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Comparing Coro/Coro/State.xs (file contents):
Revision 1.252 by root, Tue Nov 4 12:08:44 2008 UTC vs.
Revision 1.468 by root, Sat Oct 29 19:12:46 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
12 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
13#include <stdio.h> 23#include <stdio.h>
14#include <errno.h> 24#include <errno.h>
15#include <assert.h> 25#include <assert.h>
16 26
17#ifdef WIN32 27#ifndef SvREFCNT_dec_NN
28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
47# endif
48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
49# define PadlistMAX(pl) AvFILLp (pl)
50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
51# define PadARRAY AvARRAY
52# define PadMAX AvFILLp
53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
18# undef setjmp 70# undef setjmp
19# undef longjmp 71# undef longjmp
20# undef _exit 72# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 73# define setjmp _setjmp /* deep magic */
22#else 74#else
23# include <inttypes.h> /* most portable stdint.h */ 75# include <inttypes.h> /* most portable stdint.h */
24#endif 76#endif
25 77
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
58 80
59#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
60 (PERL_REVISION > (a) \ 82# define HAS_SCOPESTACK_NAME 1
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif 83#endif
116 84
117/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif 88#endif
121 89
122/* The next macros try to return the current stack pointer, in an as 90/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */ 91 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel
125#define STACKLEVEL ((void *)&stacklevel)
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3 92#if __GNUC__ >= 4
130# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
131# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else 95#else
134# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
135# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
136# define expect(expr,value) (expr)
137#endif 98#endif
138 99
139#define expect_false(expr) expect ((expr) != 0, 0) 100#define IN_DESTRUCT PL_dirty
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143 101
144#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
145 104
146#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
147static perl_mutex coro_mutex; 106# if CORO_PTHREAD
148# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
149# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
150#else
151# define LOCK (void)0
152# define UNLOCK (void)0
153#endif 108# endif
109#endif
154 110
155/* helper storage struct for Coro::AIO */ 111#ifdef __linux
156struct io_state 112# include <time.h> /* for timespec */
157{ 113# include <syscall.h> /* for SYS_* */
158 AV *res; 114# ifdef SYS_clock_gettime
159 int errorno; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
160 I32 laststype; 116# define CORO_CLOCK_MONOTONIC 1
161 int laststatval; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
162 Stat_t statcache; 118# endif
163}; 119#endif
120
121/* perl usually suppressed asserts. for debugging, we sometimes force it to be on */
122#if 0
123# undef NDEBUG
124# include <assert.h>
125#endif
164 126
165static double (*nvtime)(); /* so why doesn't it take void? */ 127static double (*nvtime)(); /* so why doesn't it take void? */
128static void (*u2time)(pTHX_ UV ret[2]);
166 129
130/* we hijack an hopefully unused CV flag for our purposes */
131#define CVf_SLF 0x4000
132static OP *pp_slf (pTHX);
133static void slf_destroy (pTHX_ struct coro *coro);
134
135static U32 cctx_gen;
167static size_t coro_stacksize = CORO_STACKSIZE; 136static size_t cctx_stacksize = CORO_STACKSIZE;
168static struct CoroAPI coroapi; 137static struct CoroAPI coroapi;
169static AV *main_mainstack; /* used to differentiate between $main and others */ 138static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env; 139static JMPENV *main_top_env;
171static HV *coro_state_stash, *coro_stash; 140static HV *coro_state_stash, *coro_stash;
172static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 141static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
173 142
143static AV *av_destroy; /* destruction queue */
144static SV *sv_manager; /* the manager coro */
145static SV *sv_idle; /* $Coro::idle */
146
174static GV *irsgv; /* $/ */ 147static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */ 148static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook; 149static SV *rv_diehook;
177static SV *rv_warnhook; 150static SV *rv_warnhook;
178static HV *hv_sig; /* %SIG */
179 151
180/* async_pool helper stuff */ 152/* async_pool helper stuff */
181static SV *sv_pool_rss; 153static SV *sv_pool_rss;
182static SV *sv_pool_size; 154static SV *sv_pool_size;
155static SV *sv_async_pool_idle; /* description string */
183static AV *av_async_pool; 156static AV *av_async_pool; /* idle pool */
157static SV *sv_Coro; /* class string */
158static CV *cv_pool_handler;
184 159
185/* Coro::AnyEvent */ 160/* Coro::AnyEvent */
186static SV *sv_activity; 161static SV *sv_activity;
187 162
163/* enable processtime/realtime profiling */
164static char enable_times;
165typedef U32 coro_ts[2];
166static coro_ts time_real, time_cpu;
167static char times_valid;
168
188static struct coro_cctx *cctx_first; 169static struct coro_cctx *cctx_first;
189static int cctx_count, cctx_idle; 170static int cctx_count, cctx_idle;
190 171
191enum { 172enum
173{
192 CC_MAPPED = 0x01, 174 CC_MAPPED = 0x01,
193 CC_NOREUSE = 0x02, /* throw this away after tracing */ 175 CC_NOREUSE = 0x02, /* throw this away after tracing */
194 CC_TRACE = 0x04, 176 CC_TRACE = 0x04,
195 CC_TRACE_SUB = 0x08, /* trace sub calls */ 177 CC_TRACE_SUB = 0x08, /* trace sub calls */
196 CC_TRACE_LINE = 0x10, /* trace each statement */ 178 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 179 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198}; 180};
199 181
200/* this is a structure representing a c-level coroutine */ 182/* this is a structure representing a c-level coroutine */
201typedef struct coro_cctx { 183typedef struct coro_cctx
184{
202 struct coro_cctx *next; 185 struct coro_cctx *next;
203 186
204 /* the stack */ 187 /* the stack */
205 void *sptr; 188 struct coro_stack stack;
206 size_t ssize;
207 189
208 /* cpu state */ 190 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 191 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
192#ifndef NDEBUG
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 193 JMPENV *idle_te; /* same as idle_sp, but for top_env */
194#endif
211 JMPENV *top_env; 195 JMPENV *top_env;
212 coro_context cctx; 196 coro_context cctx;
213 197
198 U32 gen;
214#if CORO_USE_VALGRIND 199#if CORO_USE_VALGRIND
215 int valgrind_id; 200 int valgrind_id;
216#endif 201#endif
217 unsigned char flags; 202 unsigned char flags;
218} coro_cctx; 203} coro_cctx;
219 204
205static coro_cctx *cctx_current; /* the currently running cctx */
206
207/*****************************************************************************/
208
209static MGVTBL coro_state_vtbl;
210
220enum { 211enum
212{
221 CF_RUNNING = 0x0001, /* coroutine is running */ 213 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */ 214 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */ 215 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 216 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
217 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
218 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
225}; 219};
226 220
227/* the structure where most of the perl state is stored, overlaid on the cxstack */ 221/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct { 222typedef struct
229 SV *defsv; 223{
230 AV *defav;
231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name; 224 #define VARx(name,expr,type) type name;
234# include "state.h" 225 #include "state.h"
235#undef VAR
236} perl_slots; 226} perl_slots;
237 227
228/* how many context stack entries do we need for perl_slots */
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
239 230
240/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
241struct coro { 232struct coro
233{
242 /* the c coroutine allocated to this perl coroutine, if any */ 234 /* the C coroutine allocated to this perl coroutine, if any */
243 coro_cctx *cctx; 235 coro_cctx *cctx;
244 236
245 /* process data */ 237 /* ready queue */
238 struct coro *next_ready;
239
240 /* state data */
241 struct CoroSLF slf_frame; /* saved slf frame */
246 AV *mainstack; 242 AV *mainstack;
247 perl_slots *slot; /* basically the saved sp */ 243 perl_slots *slot; /* basically the saved sp */
248 244
245 CV *startcv; /* the CV to execute */
249 AV *args; /* data associated with this coroutine (initial args) */ 246 AV *args; /* data associated with this coroutine (initial args) */
250 int refcnt; /* coroutines are refcounted, yes */
251 int flags; /* CF_ flags */ 247 int flags; /* CF_ flags */
252 HV *hv; /* the perl hash associated with this coro, if any */ 248 HV *hv; /* the perl hash associated with this coro, if any */
253 249
254 /* statistics */ 250 /* statistics */
255 int usecount; /* number of transfers to this coro */ 251 int usecount; /* number of transfers to this coro */
256 252
257 /* coro process data */ 253 /* coro process data */
258 int prio; 254 int prio;
259 SV *throw; /* exception to be thrown */ 255 SV *except; /* exception to be thrown */
256 SV *rouse_cb; /* last rouse callback */
257 AV *on_destroy; /* callbacks or coros to notify on destroy */
258 AV *status; /* the exit status list */
260 259
261 /* async_pool */ 260 /* async_pool */
262 SV *saved_deffh; 261 SV *saved_deffh;
262 SV *invoke_cb;
263 AV *invoke_av;
264
265 /* on_enter/on_leave */
266 AV *on_enter; AV *on_enter_xs;
267 AV *on_leave; AV *on_leave_xs;
268
269 /* swap_sv */
270 AV *swap_sv;
271
272 /* times */
273 coro_ts t_cpu, t_real;
263 274
264 /* linked list */ 275 /* linked list */
265 struct coro *next, *prev; 276 struct coro *next, *prev;
266}; 277};
267 278
268typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
269typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
270 281
282/* the following variables are effectively part of the perl context */
283/* and get copied between struct coro and these variables */
284/* the main reason we don't support windows process emulation */
285static struct CoroSLF slf_frame; /* the current slf frame */
286
271/** Coro ********************************************************************/ 287/** Coro ********************************************************************/
272 288
273#define PRIO_MAX 3 289#define CORO_PRIO_MAX 3
274#define PRIO_HIGH 1 290#define CORO_PRIO_HIGH 1
275#define PRIO_NORMAL 0 291#define CORO_PRIO_NORMAL 0
276#define PRIO_LOW -1 292#define CORO_PRIO_LOW -1
277#define PRIO_IDLE -3 293#define CORO_PRIO_IDLE -3
278#define PRIO_MIN -4 294#define CORO_PRIO_MIN -4
279 295
280/* for Coro.pm */ 296/* for Coro.pm */
281static SV *coro_current; 297static SV *coro_current;
282static SV *coro_readyhook; 298static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 299static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static int coro_nready; 300static CV *cv_coro_run;
285static struct coro *coro_first; 301static struct coro *coro_first;
302#define coro_nready coroapi.nready
303
304/** JIT *********************************************************************/
305
306#if CORO_JIT
307 /* APPLE doesn't have mmap though */
308 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
309 #ifndef CORO_JIT_TYPE
310 #if ECB_AMD64 && CORO_JIT_UNIXY
311 #define CORO_JIT_TYPE "amd64-unix"
312 #elif __i386 && CORO_JIT_UNIXY
313 #define CORO_JIT_TYPE "x86-unix"
314 #endif
315 #endif
316#endif
317
318#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
319 #undef CORO_JIT
320#endif
321
322#if CORO_JIT
323 typedef void (*load_save_perl_slots_type)(perl_slots *);
324 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
325#endif
326
327/** Coro::Select ************************************************************/
328
329static OP *(*coro_old_pp_sselect) (pTHX);
330static SV *coro_select_select;
331
332/* horrible hack, but if it works... */
333static OP *
334coro_pp_sselect (pTHX)
335{
336 dSP;
337 PUSHMARK (SP - 4); /* fake argument list */
338 XPUSHs (coro_select_select);
339 PUTBACK;
340
341 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
342 PL_op->op_flags |= OPf_STACKED;
343 PL_op->op_private = 0;
344 return PL_ppaddr [OP_ENTERSUB](aTHX);
345}
346
347/** time stuff **************************************************************/
348
349#ifdef HAS_GETTIMEOFDAY
350
351ecb_inline void
352coro_u2time (pTHX_ UV ret[2])
353{
354 struct timeval tv;
355 gettimeofday (&tv, 0);
356
357 ret [0] = tv.tv_sec;
358 ret [1] = tv.tv_usec;
359}
360
361ecb_inline double
362coro_nvtime (void)
363{
364 struct timeval tv;
365 gettimeofday (&tv, 0);
366
367 return tv.tv_sec + tv.tv_usec * 1e-6;
368}
369
370ecb_inline void
371time_init (pTHX)
372{
373 nvtime = coro_nvtime;
374 u2time = coro_u2time;
375}
376
377#else
378
379ecb_inline void
380time_init (pTHX)
381{
382 SV **svp;
383
384 require_pv ("Time/HiRes.pm");
385
386 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
387
388 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
389 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
390
391 nvtime = INT2PTR (double (*)(), SvIV (*svp));
392
393 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
394 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
395}
396
397#endif
286 398
287/** lowlevel stuff **********************************************************/ 399/** lowlevel stuff **********************************************************/
288 400
289static SV * 401static SV * ecb_noinline
290coro_get_sv (pTHX_ const char *name, int create) 402coro_get_sv (pTHX_ const char *name, int create)
291{ 403{
292#if PERL_VERSION_ATLEAST (5,10,0) 404#if PERL_VERSION_ATLEAST (5,10,0)
293 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
294 get_sv (name, create); 406 get_sv (name, create);
295#endif 407#endif
296 return get_sv (name, create); 408 return get_sv (name, create);
297} 409}
298 410
299static AV * 411static AV * ecb_noinline
300coro_get_av (pTHX_ const char *name, int create) 412coro_get_av (pTHX_ const char *name, int create)
301{ 413{
302#if PERL_VERSION_ATLEAST (5,10,0) 414#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 415 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_av (name, create); 416 get_av (name, create);
305#endif 417#endif
306 return get_av (name, create); 418 return get_av (name, create);
307} 419}
308 420
309static HV * 421static HV * ecb_noinline
310coro_get_hv (pTHX_ const char *name, int create) 422coro_get_hv (pTHX_ const char *name, int create)
311{ 423{
312#if PERL_VERSION_ATLEAST (5,10,0) 424#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 425 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_hv (name, create); 426 get_hv (name, create);
315#endif 427#endif
316 return get_hv (name, create); 428 return get_hv (name, create);
317} 429}
318 430
319static AV * 431ecb_inline void
432coro_times_update (void)
433{
434#ifdef coro_clock_gettime
435 struct timespec ts;
436
437 ts.tv_sec = ts.tv_nsec = 0;
438 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
439 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
440
441 ts.tv_sec = ts.tv_nsec = 0;
442 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
443 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
444#else
445 dTHX;
446 UV tv[2];
447
448 u2time (aTHX_ tv);
449 time_real [0] = tv [0];
450 time_real [1] = tv [1] * 1000;
451#endif
452}
453
454ecb_inline void
455coro_times_add (struct coro *c)
456{
457 c->t_real [1] += time_real [1];
458 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
459 c->t_real [0] += time_real [0];
460
461 c->t_cpu [1] += time_cpu [1];
462 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
463 c->t_cpu [0] += time_cpu [0];
464}
465
466ecb_inline void
467coro_times_sub (struct coro *c)
468{
469 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
470 c->t_real [1] -= time_real [1];
471 c->t_real [0] -= time_real [0];
472
473 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
474 c->t_cpu [1] -= time_cpu [1];
475 c->t_cpu [0] -= time_cpu [0];
476}
477
478/*****************************************************************************/
479/* magic glue */
480
481#define CORO_MAGIC_type_cv 26
482#define CORO_MAGIC_type_state PERL_MAGIC_ext
483
484#define CORO_MAGIC_NN(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
486 ? SvMAGIC (sv) \
487 : mg_find (sv, type))
488
489#define CORO_MAGIC(sv, type) \
490 (ecb_expect_true (SvMAGIC (sv)) \
491 ? CORO_MAGIC_NN (sv, type) \
492 : 0)
493
494#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
495#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
496
497ecb_inline MAGIC *
498SvSTATEhv_p (pTHX_ SV *coro)
499{
500 MAGIC *mg;
501
502 if (ecb_expect_true (
503 SvTYPE (coro) == SVt_PVHV
504 && (mg = CORO_MAGIC_state (coro))
505 && mg->mg_virtual == &coro_state_vtbl
506 ))
507 return mg;
508
509 return 0;
510}
511
512ecb_inline struct coro *
513SvSTATE_ (pTHX_ SV *coro_sv)
514{
515 MAGIC *mg;
516
517 if (SvROK (coro_sv))
518 coro_sv = SvRV (coro_sv);
519
520 mg = SvSTATEhv_p (aTHX_ coro_sv);
521 if (!mg)
522 croak ("Coro::State object required");
523
524 return (struct coro *)mg->mg_ptr;
525}
526
527#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
528
529/* faster than SvSTATE, but expects a coroutine hv */
530#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
531#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
532
533/*****************************************************************************/
534/* padlist management and caching */
535
536ecb_inline PADLIST *
320coro_clone_padlist (pTHX_ CV *cv) 537coro_derive_padlist (pTHX_ CV *cv)
321{ 538{
322 AV *padlist = CvPADLIST (cv); 539 PADLIST *padlist = CvPADLIST (cv);
323 AV *newpadlist, *newpad; 540 PADLIST *newpadlist;
541 PADNAMELIST *padnames;
542 PAD *newpad;
543 PADOFFSET off = PadlistMAX (padlist) + 1;
324 544
325 newpadlist = newAV (); 545#if NEWPADAPI
546
547 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
548 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
549 while (!PadlistARRAY (padlist)[off - 1])
550 --off;
551
552 Perl_pad_push (aTHX_ padlist, off);
553
554 newpad = PadlistARRAY (padlist)[off];
555 PadlistARRAY (padlist)[off] = 0;
556
557#else
558
559#if PERL_VERSION_ATLEAST (5,10,0)
560 Perl_pad_push (aTHX_ padlist, off);
561#else
562 Perl_pad_push (aTHX_ padlist, off, 1);
563#endif
564
565 newpad = PadlistARRAY (padlist)[off];
566 PadlistMAX (padlist) = off - 1;
567
568#endif
569
570 newPADLIST (newpadlist);
571#if !PERL_VERSION_ATLEAST(5,15,3)
572 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
326 AvREAL_off (newpadlist); 573 AvREAL_off (newpadlist);
327#if PERL_VERSION_ATLEAST (5,10,0)
328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
329#else
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
331#endif 574#endif
332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
333 --AvFILLp (padlist);
334 575
335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 576 /* Already extended to 2 elements by newPADLIST. */
336 av_store (newpadlist, 1, (SV *)newpad); 577 PadlistMAX (newpadlist) = 1;
578
579 padnames = PadlistNAMES (padlist);
580 ++PadnamelistREFCNT (padnames);
581 PadlistNAMES (newpadlist) = padnames;
582
583 PadlistARRAY (newpadlist)[1] = newpad;
337 584
338 return newpadlist; 585 return newpadlist;
339} 586}
340 587
341static void 588ecb_inline void
342free_padlist (pTHX_ AV *padlist) 589free_padlist (pTHX_ PADLIST *padlist)
343{ 590{
344 /* may be during global destruction */ 591 /* may be during global destruction */
345 if (SvREFCNT (padlist)) 592 if (!IN_DESTRUCT)
346 { 593 {
347 I32 i = AvFILLp (padlist); 594 I32 i = PadlistMAX (padlist);
348 while (i >= 0) 595
596 while (i > 0) /* special-case index 0 */
349 { 597 {
350 SV **svp = av_fetch (padlist, i--, FALSE); 598 /* we try to be extra-careful here */
599 PAD *pad = PadlistARRAY (padlist)[i--];
600
351 if (svp) 601 if (pad)
352 { 602 {
353 SV *sv; 603 I32 j = PadMAX (pad);
354 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 604
605 while (j >= 0)
355 SvREFCNT_dec (sv); 606 SvREFCNT_dec (PadARRAY (pad)[j--]);
356 607
608 PadMAX (pad) = -1;
357 SvREFCNT_dec (*svp); 609 SvREFCNT_dec (pad);
358 } 610 }
359 } 611 }
360 612
613 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
614
615#if NEWPADAPI
616 Safefree (PadlistARRAY (padlist));
617 Safefree (padlist);
618#else
619 AvFILLp (padlist) = -1;
620 AvREAL_off (padlist);
361 SvREFCNT_dec ((SV*)padlist); 621 SvREFCNT_dec ((SV*)padlist);
622#endif
362 } 623 }
363} 624}
364 625
365static int 626static int
366coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 627coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
367{ 628{
368 AV *padlist; 629 PADLIST *padlist;
369 AV *av = (AV *)mg->mg_obj; 630 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
631 size_t len = *(size_t *)mg->mg_ptr;
370 632
371 /* casting is fun. */ 633 /* perl manages to free our internal AV and _then_ call us */
372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 634 if (IN_DESTRUCT)
635 return 0;
636
637 while (len--)
373 free_padlist (aTHX_ padlist); 638 free_padlist (aTHX_ padlists[len]);
374
375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
376 639
377 return 0; 640 return 0;
378} 641}
379
380#define CORO_MAGIC_type_cv PERL_MAGIC_ext
381#define CORO_MAGIC_type_state PERL_MAGIC_ext
382 642
383static MGVTBL coro_cv_vtbl = { 643static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0, 644 0, 0, 0, 0,
385 coro_cv_free 645 coro_cv_free
386}; 646};
387 647
388#define CORO_MAGIC(sv,type) \
389 SvMAGIC (sv) \
390 ? SvMAGIC (sv)->mg_type == type \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type) \
393 : 0
394
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
397
398static struct coro *
399SvSTATE_ (pTHX_ SV *coro)
400{
401 HV *stash;
402 MAGIC *mg;
403
404 if (SvROK (coro))
405 coro = SvRV (coro);
406
407 if (expect_false (SvTYPE (coro) != SVt_PVHV))
408 croak ("Coro::State object required");
409
410 stash = SvSTASH (coro);
411 if (expect_false (stash != coro_stash && stash != coro_state_stash))
412 {
413 /* very slow, but rare, check */
414 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
415 croak ("Coro::State object required");
416 }
417
418 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr;
420}
421
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
423
424/* the next two functions merely cache the padlists */ 648/* the next two functions merely cache the padlists */
425static void 649ecb_inline void
426get_padlist (pTHX_ CV *cv) 650get_padlist (pTHX_ CV *cv)
427{ 651{
428 MAGIC *mg = CORO_MAGIC_cv (cv); 652 MAGIC *mg = CORO_MAGIC_cv (cv);
429 AV *av; 653 size_t *lenp;
430 654
431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 655 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 656 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
433 else 657 else
434 { 658 {
435#if CORO_PREFER_PERL_FUNCTIONS 659#if CORO_PREFER_PERL_FUNCTIONS
436 /* this is probably cleaner? but also slower! */ 660 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */ 661 /* in practise, it seems to be less stable */
438 CV *cp = Perl_cv_clone (cv); 662 CV *cp = Perl_cv_clone (aTHX_ cv);
439 CvPADLIST (cv) = CvPADLIST (cp); 663 CvPADLIST (cv) = CvPADLIST (cp);
440 CvPADLIST (cp) = 0; 664 CvPADLIST (cp) = 0;
441 SvREFCNT_dec (cp); 665 SvREFCNT_dec (cp);
442#else 666#else
443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 667 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
444#endif 668#endif
445 } 669 }
446} 670}
447 671
448static void 672ecb_inline void
449put_padlist (pTHX_ CV *cv) 673put_padlist (pTHX_ CV *cv)
450{ 674{
451 MAGIC *mg = CORO_MAGIC_cv (cv); 675 MAGIC *mg = CORO_MAGIC_cv (cv);
452 AV *av;
453 676
454 if (expect_false (!mg)) 677 if (ecb_expect_false (!mg))
678 {
455 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 679 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
680 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
681 mg->mg_len = 1; /* so mg_free frees mg_ptr */
682 }
683 else
684 Renew (mg->mg_ptr,
685 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
686 char);
456 687
457 av = (AV *)mg->mg_obj; 688 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
458
459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
460 av_extend (av, AvMAX (av) + 1);
461
462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
463} 689}
464 690
465/** load & save, init *******************************************************/ 691/** load & save, init *******************************************************/
692
693ecb_inline void
694swap_sv (SV *a, SV *b)
695{
696 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
697 SV tmp;
698
699 /* swap sv_any */
700 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
701
702 /* swap sv_flags */
703 SvFLAGS (&tmp) = SvFLAGS (a);
704 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
705 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
706
707#if PERL_VERSION_ATLEAST (5,10,0)
708 /* perl 5.10 and later complicates this _quite_ a bit, but it also
709 * is much faster, so no quarrels here. alternatively, we could
710 * sv_upgrade to avoid this.
711 */
712 {
713 /* swap sv_u */
714 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
715
716 /* if SvANY points to the head, we need to adjust the pointers,
717 * as the pointer for a still points to b, and maybe vice versa.
718 */
719 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
720 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
721 svany_in_head_set |= 1 << SVt_NV;
722 #endif
723
724 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
725
726 if (svany_in_head (SvTYPE (a)))
727 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
728
729 if (svany_in_head (SvTYPE (b)))
730 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
731 }
732#endif
733}
734
735/* swap sv heads, at least logically */
736static void
737swap_svs_enter (pTHX_ Coro__State c)
738{
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
742 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
743}
744
745static void
746swap_svs_leave (pTHX_ Coro__State c)
747{
748 int i;
749
750 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
751 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
752}
753
754#define SWAP_SVS_ENTER(coro) \
755 if (ecb_expect_false ((coro)->swap_sv)) \
756 swap_svs_enter (aTHX_ (coro))
757
758#define SWAP_SVS_LEAVE(coro) \
759 if (ecb_expect_false ((coro)->swap_sv)) \
760 swap_svs_leave (aTHX_ (coro))
761
762static void
763on_enterleave_call (pTHX_ SV *cb);
466 764
467static void 765static void
468load_perl (pTHX_ Coro__State c) 766load_perl (pTHX_ Coro__State c)
469{ 767{
470 perl_slots *slot = c->slot; 768 perl_slots *slot = c->slot;
471 c->slot = 0; 769 c->slot = 0;
472 770
473 PL_mainstack = c->mainstack; 771 PL_mainstack = c->mainstack;
474 772
475 GvSV (PL_defgv) = slot->defsv; 773#if CORO_JIT
476 GvAV (PL_defgv) = slot->defav; 774 load_perl_slots (slot);
477 GvSV (PL_errgv) = slot->errsv; 775#else
478 GvSV (irsgv) = slot->irsgv;
479
480 #define VAR(name,type) PL_ ## name = slot->name; 776 #define VARx(name,expr,type) expr = slot->name;
481 # include "state.h" 777 #include "state.h"
482 #undef VAR 778#endif
483 779
484 { 780 {
485 dSP; 781 dSP;
486 782
487 CV *cv; 783 CV *cv;
488 784
489 /* now do the ugly restore mess */ 785 /* now do the ugly restore mess */
490 while (expect_true (cv = (CV *)POPs)) 786 while (ecb_expect_true (cv = (CV *)POPs))
491 { 787 {
492 put_padlist (aTHX_ cv); /* mark this padlist as available */ 788 put_padlist (aTHX_ cv); /* mark this padlist as available */
493 CvDEPTH (cv) = PTR2IV (POPs); 789 CvDEPTH (cv) = PTR2IV (POPs);
494 CvPADLIST (cv) = (AV *)POPs; 790 CvPADLIST (cv) = (PADLIST *)POPs;
495 } 791 }
496 792
497 PUTBACK; 793 PUTBACK;
498 } 794 }
795
796 slf_frame = c->slf_frame;
797 CORO_THROW = c->except;
798
799 if (ecb_expect_false (enable_times))
800 {
801 if (ecb_expect_false (!times_valid))
802 coro_times_update ();
803
804 coro_times_sub (c);
805 }
806
807 if (ecb_expect_false (c->on_enter))
808 {
809 int i;
810
811 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
812 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
813 }
814
815 if (ecb_expect_false (c->on_enter_xs))
816 {
817 int i;
818
819 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
820 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
821 }
822
823 SWAP_SVS_ENTER (c);
499} 824}
500 825
501static void 826static void
502save_perl (pTHX_ Coro__State c) 827save_perl (pTHX_ Coro__State c)
503{ 828{
829 SWAP_SVS_LEAVE (c);
830
831 if (ecb_expect_false (c->on_leave_xs))
832 {
833 int i;
834
835 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
836 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
837 }
838
839 if (ecb_expect_false (c->on_leave))
840 {
841 int i;
842
843 for (i = AvFILLp (c->on_leave); i >= 0; --i)
844 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
845 }
846
847 times_valid = 0;
848
849 if (ecb_expect_false (enable_times))
850 {
851 coro_times_update (); times_valid = 1;
852 coro_times_add (c);
853 }
854
855 c->except = CORO_THROW;
856 c->slf_frame = slf_frame;
857
504 { 858 {
505 dSP; 859 dSP;
506 I32 cxix = cxstack_ix; 860 I32 cxix = cxstack_ix;
507 PERL_CONTEXT *ccstk = cxstack; 861 PERL_CONTEXT *ccstk = cxstack;
508 PERL_SI *top_si = PL_curstackinfo; 862 PERL_SI *top_si = PL_curstackinfo;
… …
514 868
515 XPUSHs (Nullsv); 869 XPUSHs (Nullsv);
516 /* this loop was inspired by pp_caller */ 870 /* this loop was inspired by pp_caller */
517 for (;;) 871 for (;;)
518 { 872 {
519 while (expect_true (cxix >= 0)) 873 while (ecb_expect_true (cxix >= 0))
520 { 874 {
521 PERL_CONTEXT *cx = &ccstk[cxix--]; 875 PERL_CONTEXT *cx = &ccstk[cxix--];
522 876
523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 877 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
524 { 878 {
525 CV *cv = cx->blk_sub.cv; 879 CV *cv = cx->blk_sub.cv;
526 880
527 if (expect_true (CvDEPTH (cv))) 881 if (ecb_expect_true (CvDEPTH (cv)))
528 { 882 {
529 EXTEND (SP, 3); 883 EXTEND (SP, 3);
530 PUSHs ((SV *)CvPADLIST (cv)); 884 PUSHs ((SV *)CvPADLIST (cv));
531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv))); 885 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
532 PUSHs ((SV *)cv); 886 PUSHs ((SV *)cv);
… …
535 get_padlist (aTHX_ cv); 889 get_padlist (aTHX_ cv);
536 } 890 }
537 } 891 }
538 } 892 }
539 893
540 if (expect_true (top_si->si_type == PERLSI_MAIN)) 894 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
541 break; 895 break;
542 896
543 top_si = top_si->si_prev; 897 top_si = top_si->si_prev;
544 ccstk = top_si->si_cxstack; 898 ccstk = top_si->si_cxstack;
545 cxix = top_si->si_cxix; 899 cxix = top_si->si_cxix;
… …
547 901
548 PUTBACK; 902 PUTBACK;
549 } 903 }
550 904
551 /* allocate some space on the context stack for our purposes */ 905 /* allocate some space on the context stack for our purposes */
552 /* we manually unroll here, as usually 2 slots is enough */ 906 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
553 if (SLOT_COUNT >= 1) CXINC;
554 if (SLOT_COUNT >= 2) CXINC;
555 if (SLOT_COUNT >= 3) CXINC;
556 { 907 {
557 int i; 908 unsigned int i;
909
558 for (i = 3; i < SLOT_COUNT; ++i) 910 for (i = 0; i < SLOT_COUNT; ++i)
559 CXINC; 911 CXINC;
560 } 912
561 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 913 cxstack_ix -= SLOT_COUNT; /* undo allocation */
914 }
562 915
563 c->mainstack = PL_mainstack; 916 c->mainstack = PL_mainstack;
564 917
565 { 918 {
566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 919 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
567 920
568 slot->defav = GvAV (PL_defgv); 921#if CORO_JIT
569 slot->defsv = DEFSV; 922 save_perl_slots (slot);
570 slot->errsv = ERRSV; 923#else
571 slot->irsgv = GvSV (irsgv);
572
573 #define VAR(name,type) slot->name = PL_ ## name; 924 #define VARx(name,expr,type) slot->name = expr;
574 # include "state.h" 925 #include "state.h"
575 #undef VAR 926#endif
576 } 927 }
577} 928}
578 929
579/* 930/*
580 * allocate various perl stacks. This is an exact copy 931 * allocate various perl stacks. This is almost an exact copy
581 * of perl.c:init_stacks, except that it uses less memory 932 * of perl.c:init_stacks, except that it uses less memory
582 * on the (sometimes correct) assumption that coroutines do 933 * on the (sometimes correct) assumption that coroutines do
583 * not usually need a lot of stackspace. 934 * not usually need a lot of stackspace.
584 */ 935 */
585#if CORO_PREFER_PERL_FUNCTIONS 936#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks 937# define coro_init_stacks(thx) init_stacks ()
587#else 938#else
588static void 939static void
589coro_init_stacks (pTHX) 940coro_init_stacks (pTHX)
590{ 941{
591 PL_curstackinfo = new_stackinfo(32, 8); 942 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
592 PL_curstackinfo->si_type = PERLSI_MAIN; 943 PL_curstackinfo->si_type = PERLSI_MAIN;
593 PL_curstack = PL_curstackinfo->si_stack; 944 PL_curstack = PL_curstackinfo->si_stack;
594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 945 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
595 946
596 PL_stack_base = AvARRAY(PL_curstack); 947 PL_stack_base = AvARRAY(PL_curstack);
… …
611#endif 962#endif
612 963
613 New(54,PL_scopestack,8,I32); 964 New(54,PL_scopestack,8,I32);
614 PL_scopestack_ix = 0; 965 PL_scopestack_ix = 0;
615 PL_scopestack_max = 8; 966 PL_scopestack_max = 8;
967#if HAS_SCOPESTACK_NAME
968 New(54,PL_scopestack_name,8,const char*);
969#endif
616 970
617 New(54,PL_savestack,24,ANY); 971 New(54,PL_savestack,24,ANY);
618 PL_savestack_ix = 0; 972 PL_savestack_ix = 0;
619 PL_savestack_max = 24; 973 PL_savestack_max = 24;
974#if PERL_VERSION_ATLEAST (5,24,0)
975 /* perl 5.24 moves SS_MAXPUSH optimisation from */
976 /* the header macros to PL_savestack_max */
977 PL_savestack_max -= SS_MAXPUSH;
978#endif
620 979
621#if !PERL_VERSION_ATLEAST (5,10,0) 980#if !PERL_VERSION_ATLEAST (5,10,0)
622 New(54,PL_retstack,4,OP*); 981 New(54,PL_retstack,4,OP*);
623 PL_retstack_ix = 0; 982 PL_retstack_ix = 0;
624 PL_retstack_max = 4; 983 PL_retstack_max = 4;
… …
628 987
629/* 988/*
630 * destroy the stacks, the callchain etc... 989 * destroy the stacks, the callchain etc...
631 */ 990 */
632static void 991static void
633coro_destroy_stacks (pTHX) 992coro_destruct_stacks (pTHX)
634{ 993{
635 while (PL_curstackinfo->si_next) 994 while (PL_curstackinfo->si_next)
636 PL_curstackinfo = PL_curstackinfo->si_next; 995 PL_curstackinfo = PL_curstackinfo->si_next;
637 996
638 while (PL_curstackinfo) 997 while (PL_curstackinfo)
… …
648 } 1007 }
649 1008
650 Safefree (PL_tmps_stack); 1009 Safefree (PL_tmps_stack);
651 Safefree (PL_markstack); 1010 Safefree (PL_markstack);
652 Safefree (PL_scopestack); 1011 Safefree (PL_scopestack);
1012#if HAS_SCOPESTACK_NAME
1013 Safefree (PL_scopestack_name);
1014#endif
653 Safefree (PL_savestack); 1015 Safefree (PL_savestack);
654#if !PERL_VERSION_ATLEAST (5,10,0) 1016#if !PERL_VERSION_ATLEAST (5,10,0)
655 Safefree (PL_retstack); 1017 Safefree (PL_retstack);
656#endif 1018#endif
657} 1019}
658 1020
1021#define CORO_RSS \
1022 rss += sizeof (SYM (curstackinfo)); \
1023 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1024 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1025 rss += SYM (tmps_max) * sizeof (SV *); \
1026 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1027 rss += SYM (scopestack_max) * sizeof (I32); \
1028 rss += SYM (savestack_max) * sizeof (ANY);
1029
659static size_t 1030static size_t
660coro_rss (pTHX_ struct coro *coro) 1031coro_rss (pTHX_ struct coro *coro)
661{ 1032{
662 size_t rss = sizeof (*coro); 1033 size_t rss = sizeof (*coro);
663 1034
664 if (coro->mainstack) 1035 if (coro->mainstack)
665 { 1036 {
666 perl_slots tmp_slot;
667 perl_slots *slot;
668
669 if (coro->flags & CF_RUNNING) 1037 if (coro->flags & CF_RUNNING)
670 { 1038 {
671 slot = &tmp_slot; 1039 #define SYM(sym) PL_ ## sym
672 1040 CORO_RSS;
673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR 1041 #undef SYM
676 } 1042 }
677 else 1043 else
678 slot = coro->slot;
679
680 if (slot)
681 { 1044 {
682 rss += sizeof (slot->curstackinfo); 1045 #define SYM(sym) coro->slot->sym
683 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1046 CORO_RSS;
684 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 1047 #undef SYM
685 rss += slot->tmps_max * sizeof (SV *);
686 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
687 rss += slot->scopestack_max * sizeof (I32);
688 rss += slot->savestack_max * sizeof (ANY);
689
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 rss += slot->retstack_max * sizeof (OP *);
692#endif
693 } 1048 }
694 } 1049 }
695 1050
696 return rss; 1051 return rss;
697} 1052}
698 1053
699/** coroutine stack handling ************************************************/ 1054/** provide custom get/set/clear methods for %SIG elements ******************/
700
701static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
702static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
703static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
704 1055
705/* apparently < 5.8.8 */ 1056/* apparently < 5.8.8 */
706#ifndef MgPV_nolen_const 1057#ifndef MgPV_nolen_const
707#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ 1058#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
708 SvPV_nolen((SV*)((mg)->mg_ptr)) : \ 1059 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
709 (const char*)(mg)->mg_ptr) 1060 (const char*)(mg)->mg_ptr)
710#endif 1061#endif
711 1062
1063/* this will be a patched copy of PL_vtbl_sigelem */
1064static MGVTBL coro_sigelem_vtbl;
1065
1066static int ecb_cold
1067coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1068{
1069 char *key = SvPV_nolen ((SV *)name);
1070
1071 /* do what mg_copy normally does */
1072 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1073 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1074
1075 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1076 if (*key == '_'
1077 && (strEQ (key, "__DIE__")
1078 || strEQ (key, "__WARN__")))
1079 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1080
1081 return 1;
1082}
1083
1084/* perl does not have a %SIG vtbl, we provide one so we can override */
1085/* the magic vtbl for the __DIE__ and __WARN__ members */
1086static const MGVTBL coro_sig_vtbl = {
1087 0, 0, 0, 0, 0,
1088 coro_sig_copy
1089};
1090
712/* 1091/*
713 * This overrides the default magic get method of %SIG elements. 1092 * This overrides the default magic get method of %SIG elements.
714 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 1093 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
715 * and instead of tryign to save and restore the hash elements, we just provide 1094 * and instead of trying to save and restore the hash elements (extremely slow),
716 * readback here. 1095 * we just provide our own readback here.
717 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
718 * not expecting this to actually change the hook. This is a potential problem
719 * when a schedule happens then, but we ignore this.
720 */ 1096 */
1097static int ecb_cold
1098coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1099{
1100 const char *s = MgPV_nolen_const (mg);
1101 /* the key must be either __DIE__ or __WARN__ here */
1102 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1103
1104 SV *ssv;
1105
1106 if (!*svp)
1107 ssv = &PL_sv_undef;
1108 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1109 ssv = sv_2mortal (newRV_inc (*svp));
1110 else
1111 ssv = *svp;
1112
1113 sv_setsv (sv, ssv);
1114 return 0;
1115}
1116
1117static int ecb_cold
1118coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 const char *s = MgPV_nolen_const (mg);
1121 /* the key must be either __DIE__ or __WARN__ here */
1122 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1123
1124 SV *old = *svp;
1125 *svp = 0;
1126 SvREFCNT_dec (old);
1127 return 0;
1128}
1129
1130static int ecb_cold
1131coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1132{
1133 const char *s = MgPV_nolen_const (mg);
1134 /* the key must be either __DIE__ or __WARN__ here */
1135 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1136
1137 SV *old = *svp;
1138 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1139 SvREFCNT_dec (old);
1140 return 0;
1141}
1142
1143static void
1144prepare_nop (pTHX_ struct coro_transfer_args *ta)
1145{
1146 /* kind of mega-hacky, but works */
1147 ta->next = ta->prev = (struct coro *)ta;
1148}
1149
721static int 1150static int
722coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 1151slf_check_nop (pTHX_ struct CoroSLF *frame)
723{ 1152{
724 const char *s = MgPV_nolen_const (mg); 1153 return 0;
725
726 if (*s == '_')
727 {
728 SV **svp = 0;
729
730 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
731 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
732
733 if (svp)
734 {
735 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
736 return 0;
737 }
738 }
739
740 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
741} 1154}
742 1155
743static int 1156static int
744coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg) 1157slf_check_repeat (pTHX_ struct CoroSLF *frame)
745{ 1158{
746 const char *s = MgPV_nolen_const (mg); 1159 return 1;
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 SV *old = *svp;
758 *svp = 0;
759 SvREFCNT_dec (old);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
765} 1160}
766 1161
767static int 1162/** coroutine stack handling ************************************************/
768coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771 1163
772 if (*s == '_') 1164static UNOP init_perl_op;
773 {
774 SV **svp = 0;
775 1165
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook; 1166ecb_noinline static void /* noinline to keep it out of the transfer fast path */
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = newSVsv (sv);
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789}
790
791static void
792coro_setup (pTHX_ struct coro *coro) 1167init_perl (pTHX_ struct coro *coro)
793{ 1168{
794 /* 1169 /*
795 * emulate part of the perl startup here. 1170 * emulate part of the perl startup here.
796 */ 1171 */
797 coro_init_stacks (aTHX); 1172 coro_init_stacks (aTHX);
798 1173
799 PL_runops = RUNOPS_DEFAULT; 1174 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling; 1175 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL; 1176 PL_in_eval = EVAL_NULL;
802 PL_comppad = 0; 1177 PL_comppad = 0;
1178 PL_comppad_name = 0;
1179 PL_comppad_name_fill = 0;
1180 PL_comppad_name_floor = 0;
803 PL_curpm = 0; 1181 PL_curpm = 0;
804 PL_curpad = 0; 1182 PL_curpad = 0;
805 PL_localizing = 0; 1183 PL_localizing = 0;
806 PL_dirty = 0;
807 PL_restartop = 0; 1184 PL_restartop = 0;
808#if PERL_VERSION_ATLEAST (5,10,0) 1185#if PERL_VERSION_ATLEAST (5,10,0)
809 PL_parser = 0; 1186 PL_parser = 0;
810#endif 1187#endif
1188 PL_hints = 0;
811 1189
812 /* recreate the die/warn hooks */ 1190 /* recreate the die/warn hooks */
813 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1191 PL_diehook = SvREFCNT_inc (rv_diehook);
814 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1192 PL_warnhook = SvREFCNT_inc (rv_warnhook);
815 1193
816 GvSV (PL_defgv) = newSV (0); 1194 GvSV (PL_defgv) = newSV (0);
817 GvAV (PL_defgv) = coro->args; coro->args = 0; 1195 GvAV (PL_defgv) = coro->args; coro->args = 0;
818 GvSV (PL_errgv) = newSV (0); 1196 GvSV (PL_errgv) = newSV (0);
819 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1197 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1198 GvHV (PL_hintgv) = newHV ();
1199#if PERL_VERSION_ATLEAST (5,10,0)
1200 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1201#endif
820 PL_rs = newSVsv (GvSV (irsgv)); 1202 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1203 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822 1204
823 { 1205 {
824 dSP; 1206 dSP;
825 LOGOP myop; 1207 UNOP myop;
826 1208
827 Zero (&myop, 1, LOGOP); 1209 Zero (&myop, 1, UNOP);
828 myop.op_next = Nullop; 1210 myop.op_next = Nullop;
1211 myop.op_type = OP_ENTERSUB;
829 myop.op_flags = OPf_WANT_VOID; 1212 myop.op_flags = OPf_WANT_VOID;
830 1213
831 PUSHMARK (SP); 1214 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1215 PUSHs ((SV *)coro->startcv);
833 PUTBACK; 1216 PUTBACK;
834 PL_op = (OP *)&myop; 1217 PL_op = (OP *)&myop;
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1218 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836 SPAGAIN;
837 } 1219 }
838 1220
839 /* this newly created coroutine might be run on an existing cctx which most 1221 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub. 1222 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */ 1223 */
844 ENTER; 1224 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
845} 1225 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1226 slf_frame.destroy = 0;
846 1227
1228 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1229 init_perl_op.op_next = PL_op;
1230 init_perl_op.op_type = OP_ENTERSUB;
1231 init_perl_op.op_ppaddr = pp_slf;
1232 /* no flags etc. required, as an init function won't be called */
1233
1234 PL_op = (OP *)&init_perl_op;
1235
1236 /* copy throw, in case it was set before init_perl */
1237 CORO_THROW = coro->except;
1238
1239 SWAP_SVS_ENTER (coro);
1240
1241 if (ecb_expect_false (enable_times))
1242 {
1243 coro_times_update ();
1244 coro_times_sub (coro);
1245 }
1246}
1247
847static void 1248static void
848coro_destroy (pTHX_ struct coro *coro) 1249coro_unwind_stacks (pTHX)
849{ 1250{
850 if (!IN_DESTRUCT) 1251 if (!IN_DESTRUCT)
851 { 1252 {
852 /* restore all saved variables and stuff */ 1253 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0); 1254 LEAVE_SCOPE (0);
… …
861 POPSTACK_TO (PL_mainstack); 1262 POPSTACK_TO (PL_mainstack);
862 1263
863 /* unwind main stack */ 1264 /* unwind main stack */
864 dounwind (-1); 1265 dounwind (-1);
865 } 1266 }
1267}
866 1268
867 SvREFCNT_dec (GvSV (PL_defgv)); 1269static void
868 SvREFCNT_dec (GvAV (PL_defgv)); 1270destroy_perl (pTHX_ struct coro *coro)
869 SvREFCNT_dec (GvSV (PL_errgv)); 1271{
870 SvREFCNT_dec (PL_defoutgv); 1272 SV *svf [9];
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
873 1273
874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876 1274 {
1275 SV *old_current = SvRV (coro_current);
1276 struct coro *current = SvSTATE (old_current);
1277
1278 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1279
1280 save_perl (aTHX_ current);
1281
1282 /* this will cause transfer_check to croak on block*/
1283 SvRV_set (coro_current, (SV *)coro->hv);
1284
1285 load_perl (aTHX_ coro);
1286
1287 /* restore swapped sv's */
1288 SWAP_SVS_LEAVE (coro);
1289
1290 coro_unwind_stacks (aTHX);
1291
1292 coro_destruct_stacks (aTHX);
1293
1294 /* now save some sv's to be free'd later */
1295 svf [0] = GvSV (PL_defgv);
1296 svf [1] = (SV *)GvAV (PL_defgv);
1297 svf [2] = GvSV (PL_errgv);
1298 svf [3] = (SV *)PL_defoutgv;
1299 svf [4] = PL_rs;
1300 svf [5] = GvSV (irsgv);
1301 svf [6] = (SV *)GvHV (PL_hintgv);
1302 svf [7] = PL_diehook;
1303 svf [8] = PL_warnhook;
1304 assert (9 == sizeof (svf) / sizeof (*svf));
1305
1306 SvRV_set (coro_current, old_current);
1307
1308 load_perl (aTHX_ current);
1309 }
1310
1311 {
1312 unsigned int i;
1313
1314 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1315 SvREFCNT_dec (svf [i]);
1316
877 SvREFCNT_dec (coro->saved_deffh); 1317 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw); 1318 SvREFCNT_dec (coro->rouse_cb);
879 1319 SvREFCNT_dec (coro->invoke_cb);
880 coro_destroy_stacks (aTHX); 1320 SvREFCNT_dec (coro->invoke_av);
1321 SvREFCNT_dec (coro->on_enter_xs);
1322 SvREFCNT_dec (coro->on_leave_xs);
1323 }
881} 1324}
882 1325
883static void 1326ecb_inline void
884free_coro_mortal (pTHX) 1327free_coro_mortal (pTHX)
885{ 1328{
886 if (expect_true (coro_mortal)) 1329 if (ecb_expect_true (coro_mortal))
887 { 1330 {
888 SvREFCNT_dec (coro_mortal); 1331 SvREFCNT_dec ((SV *)coro_mortal);
889 coro_mortal = 0; 1332 coro_mortal = 0;
890 } 1333 }
891} 1334}
892 1335
893static int 1336static int
894runops_trace (pTHX) 1337runops_trace (pTHX)
895{ 1338{
896 COP *oldcop = 0; 1339 COP *oldcop = 0;
897 int oldcxix = -2; 1340 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx;
900 1341
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1342 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 { 1343 {
903 PERL_ASYNC_CHECK (); 1344 PERL_ASYNC_CHECK ();
904 1345
905 if (cctx->flags & CC_TRACE_ALL) 1346 if (cctx_current->flags & CC_TRACE_ALL)
906 { 1347 {
907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1348 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
908 { 1349 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1350 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910 SV **bot, **top; 1351 SV **bot, **top;
911 AV *av = newAV (); /* return values */ 1352 AV *av = newAV (); /* return values */
912 SV **cb; 1353 SV **cb;
… …
949 1390
950 if (PL_curcop != &PL_compiling) 1391 if (PL_curcop != &PL_compiling)
951 { 1392 {
952 SV **cb; 1393 SV **cb;
953 1394
954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1395 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
955 { 1396 {
956 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1397 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
957 1398
958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1399 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
959 { 1400 {
960 runops_proc_t old_runops = PL_runops;
961 dSP; 1401 dSP;
962 GV *gv = CvGV (cx->blk_sub.cv); 1402 GV *gv = CvGV (cx->blk_sub.cv);
963 SV *fullname = sv_2mortal (newSV (0)); 1403 SV *fullname = sv_2mortal (newSV (0));
964 1404
965 if (isGV (gv)) 1405 if (isGV (gv))
… …
970 SAVETMPS; 1410 SAVETMPS;
971 EXTEND (SP, 3); 1411 EXTEND (SP, 3);
972 PUSHMARK (SP); 1412 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes); 1413 PUSHs (&PL_sv_yes);
974 PUSHs (fullname); 1414 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1415 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK; 1416 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1417 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1418 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN; 1419 SPAGAIN;
980 FREETMPS; 1420 FREETMPS;
… …
983 } 1423 }
984 1424
985 oldcxix = cxstack_ix; 1425 oldcxix = cxstack_ix;
986 } 1426 }
987 1427
988 if (cctx->flags & CC_TRACE_LINE) 1428 if (cctx_current->flags & CC_TRACE_LINE)
989 { 1429 {
990 dSP; 1430 dSP;
991 1431
992 PL_runops = RUNOPS_DEFAULT; 1432 PL_runops = RUNOPS_DEFAULT;
993 ENTER; 1433 ENTER;
… …
1012 1452
1013 TAINT_NOT; 1453 TAINT_NOT;
1014 return 0; 1454 return 0;
1015} 1455}
1016 1456
1017/* inject a fake call to Coro::State::_cctx_init into the execution */ 1457static struct CoroSLF cctx_ssl_frame;
1018/* _cctx_init should be careful, as it could be called at almost any time */
1019/* during execution of a perl program */
1020static void NOINLINE
1021cctx_prepare (pTHX_ coro_cctx *cctx)
1022{
1023 dSP;
1024 LOGOP myop;
1025 1458
1459static void
1460slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1461{
1462 ta->prev = 0;
1463}
1464
1465static int
1466slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1467{
1468 *frame = cctx_ssl_frame;
1469
1470 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1471}
1472
1473/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1474static void ecb_noinline
1475cctx_prepare (pTHX)
1476{
1026 PL_top_env = &PL_start_env; 1477 PL_top_env = &PL_start_env;
1027 1478
1028 if (cctx->flags & CC_TRACE) 1479 if (cctx_current->flags & CC_TRACE)
1029 PL_runops = runops_trace; 1480 PL_runops = runops_trace;
1030 1481
1031 Zero (&myop, 1, LOGOP); 1482 /* we already must be executing an SLF op, there is no other valid way
1032 myop.op_next = PL_op; 1483 * that can lead to creation of a new cctx */
1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1484 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1485 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1034 1486
1035 PUSHMARK (SP); 1487 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1036 EXTEND (SP, 2); 1488 cctx_ssl_frame = slf_frame;
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1489
1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1490 slf_frame.prepare = slf_prepare_set_stacklevel;
1039 PUTBACK; 1491 slf_frame.check = slf_check_set_stacklevel;
1040 PL_op = (OP *)&myop; 1492}
1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1493
1042 SPAGAIN; 1494/* the tail of transfer: execute stuff we can only do after a transfer */
1495ecb_inline void
1496transfer_tail (pTHX)
1497{
1498 free_coro_mortal (aTHX);
1499}
1500
1501/* try to exit the same way perl's main function would do */
1502/* we do not bother resetting the environment or other things *7
1503/* that are not, uhm, essential */
1504/* this obviously also doesn't work when perl is embedded */
1505static void ecb_noinline ecb_cold
1506perlish_exit (pTHX)
1507{
1508 int exitstatus = perl_destruct (PL_curinterp);
1509 perl_free (PL_curinterp);
1510 exit (exitstatus);
1043} 1511}
1044 1512
1045/* 1513/*
1046 * this is a _very_ stripped down perl interpreter ;) 1514 * this is a _very_ stripped down perl interpreter ;)
1047 */ 1515 */
1048static void 1516static void
1049cctx_run (void *arg) 1517cctx_run (void *arg)
1050{ 1518{
1519#ifdef USE_ITHREADS
1520# if CORO_PTHREAD
1521 PERL_SET_CONTEXT (coro_thx);
1522# endif
1523#endif
1524 {
1051 dTHX; 1525 dTHX;
1052 1526
1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1527 /* normally we would need to skip the entersub here */
1054 UNLOCK; 1528 /* not doing so will re-execute it, which is exactly what we want */
1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next; 1529 /* PL_nop = PL_nop->op_next */
1058 1530
1059 /* inject a fake subroutine call to cctx_init */ 1531 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg); 1532 cctx_prepare (aTHX);
1061 1533
1534 /* cctx_run is the alternative tail of transfer() */
1535 transfer_tail (aTHX);
1536
1062 /* somebody or something will hit me for both perl_run and PL_restartop */ 1537 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op; 1538 PL_restartop = PL_op;
1064 perl_run (PL_curinterp); 1539 perl_run (PL_curinterp);
1065
1066 /* 1540 /*
1541 * Unfortunately, there is no way to get at the return values of the
1542 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1543 * runtime errors here, as this is just a random interpreter, not a thread.
1544 */
1545
1546 /*
1547 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1548 * requires PL_scopestack_ix, so do it here if required.
1549 */
1550 if (!PL_scopestack_ix)
1551 ENTER;
1552
1553 /*
1067 * If perl-run returns we assume exit() was being called or the coro 1554 * If perl-run returns we assume exit() was being called or the coro
1068 * fell off the end, which seems to be the only valid (non-bug) 1555 * fell off the end, which seems to be the only valid (non-bug)
1069 * reason for perl_run to return. We try to exit by jumping to the 1556 * reason for perl_run to return. We try to mimic whatever perl is normally
1070 * bootstrap-time "top" top_env, as we cannot restore the "main" 1557 * doing in that case. YMMV.
1071 * coroutine as Coro has no such concept
1072 */ 1558 */
1073 PL_top_env = main_top_env; 1559 perlish_exit (aTHX);
1074 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1560 }
1075} 1561}
1076 1562
1077static coro_cctx * 1563static coro_cctx *
1078cctx_new () 1564cctx_new (void)
1079{ 1565{
1080 coro_cctx *cctx; 1566 coro_cctx *cctx;
1081 void *stack_start;
1082 size_t stack_size;
1083 1567
1084 ++cctx_count; 1568 ++cctx_count;
1085
1086 Newz (0, cctx, 1, coro_cctx); 1569 New (0, cctx, 1, coro_cctx);
1087 1570
1088#if HAVE_MMAP 1571 cctx->gen = cctx_gen;
1089 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1572 cctx->flags = 0;
1090 /* mmap supposedly does allocate-on-write for us */ 1573 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1091 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1092 1574
1093 if (cctx->sptr != (void *)-1) 1575 return cctx;
1094 { 1576}
1095# if CORO_STACKGUARD 1577
1096 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1578/* create a new cctx only suitable as source */
1097# endif 1579static coro_cctx *
1098 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1580cctx_new_empty (void)
1099 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1581{
1100 cctx->flags |= CC_MAPPED; 1582 coro_cctx *cctx = cctx_new ();
1583
1584 cctx->stack.sptr = 0;
1585 coro_create (&cctx->cctx, 0, 0, 0, 0);
1586
1587 return cctx;
1588}
1589
1590/* create a new cctx suitable as destination/running a perl interpreter */
1591static coro_cctx *
1592cctx_new_run (void)
1593{
1594 coro_cctx *cctx = cctx_new ();
1595
1596 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1101 } 1597 {
1102 else
1103#endif
1104 {
1105 cctx->ssize = coro_stacksize * (long)sizeof (long);
1106 New (0, cctx->sptr, coro_stacksize, long);
1107
1108 if (!cctx->sptr)
1109 {
1110 perror ("FATAL: unable to allocate stack for coroutine"); 1598 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1111 _exit (EXIT_FAILURE); 1599 _exit (EXIT_FAILURE);
1112 }
1113
1114 stack_start = cctx->sptr;
1115 stack_size = cctx->ssize;
1116 } 1600 }
1117 1601
1118 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1119 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1602 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1120 1603
1121 return cctx; 1604 return cctx;
1122} 1605}
1123 1606
1124static void 1607static void
1125cctx_destroy (coro_cctx *cctx) 1608cctx_destroy (coro_cctx *cctx)
1126{ 1609{
1127 if (!cctx) 1610 if (!cctx)
1128 return; 1611 return;
1129 1612
1613 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1614
1130 --cctx_count; 1615 --cctx_count;
1616 coro_destroy (&cctx->cctx);
1131 1617
1132#if CORO_USE_VALGRIND 1618 coro_stack_free (&cctx->stack);
1133 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1134#endif
1135
1136#if HAVE_MMAP
1137 if (cctx->flags & CC_MAPPED)
1138 munmap (cctx->sptr, cctx->ssize);
1139 else
1140#endif
1141 Safefree (cctx->sptr);
1142 1619
1143 Safefree (cctx); 1620 Safefree (cctx);
1144} 1621}
1145 1622
1146/* wether this cctx should be destructed */ 1623/* wether this cctx should be destructed */
1147#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1624#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1148 1625
1149static coro_cctx * 1626static coro_cctx *
1150cctx_get (pTHX) 1627cctx_get (pTHX)
1151{ 1628{
1152 while (expect_true (cctx_first)) 1629 while (ecb_expect_true (cctx_first))
1153 { 1630 {
1154 coro_cctx *cctx = cctx_first; 1631 coro_cctx *cctx = cctx_first;
1155 cctx_first = cctx->next; 1632 cctx_first = cctx->next;
1156 --cctx_idle; 1633 --cctx_idle;
1157 1634
1158 if (expect_true (!CCTX_EXPIRED (cctx))) 1635 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1159 return cctx; 1636 return cctx;
1160 1637
1161 cctx_destroy (cctx); 1638 cctx_destroy (cctx);
1162 } 1639 }
1163 1640
1164 return cctx_new (); 1641 return cctx_new_run ();
1165} 1642}
1166 1643
1167static void 1644static void
1168cctx_put (coro_cctx *cctx) 1645cctx_put (coro_cctx *cctx)
1169{ 1646{
1647 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1648
1170 /* free another cctx if overlimit */ 1649 /* free another cctx if overlimit */
1171 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1650 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1172 { 1651 {
1173 coro_cctx *first = cctx_first; 1652 coro_cctx *first = cctx_first;
1174 cctx_first = first->next; 1653 cctx_first = first->next;
1175 --cctx_idle; 1654 --cctx_idle;
1176 1655
… …
1185/** coroutine switching *****************************************************/ 1664/** coroutine switching *****************************************************/
1186 1665
1187static void 1666static void
1188transfer_check (pTHX_ struct coro *prev, struct coro *next) 1667transfer_check (pTHX_ struct coro *prev, struct coro *next)
1189{ 1668{
1669 /* TODO: throwing up here is considered harmful */
1670
1190 if (expect_true (prev != next)) 1671 if (ecb_expect_true (prev != next))
1191 { 1672 {
1192 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1673 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1193 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1674 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1194 1675
1195 if (expect_false (next->flags & CF_RUNNING)) 1676 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1196 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1197
1198 if (expect_false (next->flags & CF_DESTROYED))
1199 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1677 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1200 1678
1201#if !PERL_VERSION_ATLEAST (5,10,0) 1679#if !PERL_VERSION_ATLEAST (5,10,0)
1202 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1680 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1203 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1681 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1204#endif 1682#endif
1205 } 1683 }
1206} 1684}
1207 1685
1208/* always use the TRANSFER macro */ 1686/* always use the TRANSFER macro */
1209static void NOINLINE 1687static void ecb_noinline /* noinline so we have a fixed stackframe */
1210transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1688transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1211{ 1689{
1212 dSTACKLEVEL; 1690 dSTACKLEVEL;
1213 1691
1214 /* sometimes transfer is only called to set idle_sp */ 1692 /* sometimes transfer is only called to set idle_sp */
1215 if (expect_false (!next)) 1693 if (ecb_expect_false (!prev))
1216 { 1694 {
1217 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1695 cctx_current->idle_sp = STACKLEVEL;
1218 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1696 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1219 } 1697 }
1220 else if (expect_true (prev != next)) 1698 else if (ecb_expect_true (prev != next))
1221 { 1699 {
1222 static volatile int has_throw;
1223 coro_cctx *prev__cctx; 1700 coro_cctx *cctx_prev;
1224 1701
1225 if (expect_false (prev->flags & CF_NEW)) 1702 if (ecb_expect_false (prev->flags & CF_NEW))
1226 { 1703 {
1227 /* create a new empty context */ 1704 /* create a new empty/source context */
1228 Newz (0, prev->cctx, 1, coro_cctx);
1229 prev->flags &= ~CF_NEW; 1705 prev->flags &= ~CF_NEW;
1230 prev->flags |= CF_RUNNING; 1706 prev->flags |= CF_RUNNING;
1231 } 1707 }
1232 1708
1233 prev->flags &= ~CF_RUNNING; 1709 prev->flags &= ~CF_RUNNING;
1234 next->flags |= CF_RUNNING; 1710 next->flags |= CF_RUNNING;
1235 1711
1236 LOCK;
1237
1238 /* first get rid of the old state */ 1712 /* first get rid of the old state */
1239 save_perl (aTHX_ prev); 1713 save_perl (aTHX_ prev);
1240 1714
1241 if (expect_false (next->flags & CF_NEW)) 1715 if (ecb_expect_false (next->flags & CF_NEW))
1242 { 1716 {
1243 /* need to start coroutine */ 1717 /* need to start coroutine */
1244 next->flags &= ~CF_NEW; 1718 next->flags &= ~CF_NEW;
1245 /* setup coroutine call */ 1719 /* setup coroutine call */
1246 coro_setup (aTHX_ next); 1720 init_perl (aTHX_ next);
1247 } 1721 }
1248 else 1722 else
1249 load_perl (aTHX_ next); 1723 load_perl (aTHX_ next);
1250 1724
1251 prev__cctx = prev->cctx;
1252
1253 /* possibly "free" the cctx */ 1725 /* possibly untie and reuse the cctx */
1254 if (expect_true ( 1726 if (ecb_expect_true (
1255 prev__cctx->idle_sp == STACKLEVEL 1727 cctx_current->idle_sp == STACKLEVEL
1256 && !(prev__cctx->flags & CC_TRACE) 1728 && !(cctx_current->flags & CC_TRACE)
1257 && !force_cctx 1729 && !force_cctx
1258 )) 1730 ))
1259 { 1731 {
1260 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1732 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1261 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1733 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1262 1734
1263 prev->cctx = 0;
1264
1265 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1735 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1266 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1736 /* without this the next cctx_get might destroy the running cctx while still in use */
1267 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1737 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1268 if (!next->cctx) 1738 if (ecb_expect_true (!next->cctx))
1269 next->cctx = cctx_get (aTHX); 1739 next->cctx = cctx_get (aTHX);
1270 1740
1271 cctx_put (prev__cctx); 1741 cctx_put (cctx_current);
1272 } 1742 }
1743 else
1744 prev->cctx = cctx_current;
1273 1745
1274 ++next->usecount; 1746 ++next->usecount;
1275 1747
1276 if (expect_true (!next->cctx)) 1748 cctx_prev = cctx_current;
1277 next->cctx = cctx_get (aTHX); 1749 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1278 1750
1279 has_throw = !!next->throw; 1751 next->cctx = 0;
1280 1752
1281 if (expect_false (prev__cctx != next->cctx)) 1753 if (ecb_expect_false (cctx_prev != cctx_current))
1282 { 1754 {
1283 prev__cctx->top_env = PL_top_env; 1755 cctx_prev->top_env = PL_top_env;
1284 PL_top_env = next->cctx->top_env; 1756 PL_top_env = cctx_current->top_env;
1285 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1757 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1286 } 1758 }
1287 1759
1288 free_coro_mortal (aTHX); 1760 transfer_tail (aTHX);
1289 UNLOCK;
1290
1291 if (expect_false (has_throw))
1292 {
1293 struct coro *coro = SvSTATE (coro_current);
1294
1295 if (coro->throw)
1296 {
1297 SV *exception = coro->throw;
1298 coro->throw = 0;
1299 sv_setsv (ERRSV, exception);
1300 croak (0);
1301 }
1302 }
1303 } 1761 }
1304} 1762}
1305
1306struct transfer_args
1307{
1308 struct coro *prev, *next;
1309};
1310 1763
1311#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1764#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1312#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1765#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1313 1766
1314/** high level stuff ********************************************************/ 1767/** high level stuff ********************************************************/
1315 1768
1769/* this function is actually Coro, not Coro::State, but we call it from here */
1770/* because it is convenient - but it hasn't been declared yet for that reason */
1316static int 1771static void
1772coro_call_on_destroy (pTHX_ struct coro *coro);
1773
1774static void
1317coro_state_destroy (pTHX_ struct coro *coro) 1775coro_state_destroy (pTHX_ struct coro *coro)
1318{ 1776{
1319 if (coro->flags & CF_DESTROYED) 1777 if (coro->flags & CF_ZOMBIE)
1320 return 0; 1778 return;
1321 1779
1780 slf_destroy (aTHX_ coro);
1781
1322 coro->flags |= CF_DESTROYED; 1782 coro->flags |= CF_ZOMBIE;
1323 1783
1324 if (coro->flags & CF_READY) 1784 if (coro->flags & CF_READY)
1325 { 1785 {
1326 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1786 /* reduce nready, as destroying a ready coro effectively unreadies it */
1327 /* alternative: look through all ready queues and remove the coro */ 1787 /* alternative: look through all ready queues and remove the coro */
1328 LOCK;
1329 --coro_nready; 1788 --coro_nready;
1330 UNLOCK;
1331 } 1789 }
1332 else 1790 else
1333 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1791 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1334
1335 if (coro->mainstack && coro->mainstack != main_mainstack)
1336 {
1337 struct coro temp;
1338
1339 if (coro->flags & CF_RUNNING)
1340 croak ("FATAL: tried to destroy currently running coroutine");
1341
1342 save_perl (aTHX_ &temp);
1343 load_perl (aTHX_ coro);
1344
1345 coro_destroy (aTHX_ coro);
1346
1347 load_perl (aTHX_ &temp);
1348
1349 coro->slot = 0;
1350 }
1351
1352 cctx_destroy (coro->cctx);
1353 SvREFCNT_dec (coro->args);
1354 1792
1355 if (coro->next) coro->next->prev = coro->prev; 1793 if (coro->next) coro->next->prev = coro->prev;
1356 if (coro->prev) coro->prev->next = coro->next; 1794 if (coro->prev) coro->prev->next = coro->next;
1357 if (coro == coro_first) coro_first = coro->next; 1795 if (coro == coro_first) coro_first = coro->next;
1358 1796
1359 return 1; 1797 if (coro->mainstack
1798 && coro->mainstack != main_mainstack
1799 && coro->slot
1800 && !PL_dirty)
1801 destroy_perl (aTHX_ coro);
1802
1803 cctx_destroy (coro->cctx);
1804 SvREFCNT_dec (coro->startcv);
1805 SvREFCNT_dec (coro->args);
1806 SvREFCNT_dec (coro->swap_sv);
1807 SvREFCNT_dec (CORO_THROW);
1808
1809 coro_call_on_destroy (aTHX_ coro);
1810
1811 /* more destruction mayhem in coro_state_free */
1360} 1812}
1361 1813
1362static int 1814static int
1363coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1815coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1364{ 1816{
1365 struct coro *coro = (struct coro *)mg->mg_ptr; 1817 struct coro *coro = (struct coro *)mg->mg_ptr;
1366 mg->mg_ptr = 0; 1818 mg->mg_ptr = 0;
1367 1819
1368 coro->hv = 0;
1369
1370 if (--coro->refcnt < 0)
1371 {
1372 coro_state_destroy (aTHX_ coro); 1820 coro_state_destroy (aTHX_ coro);
1821 SvREFCNT_dec (coro->on_destroy);
1822 SvREFCNT_dec (coro->status);
1823
1373 Safefree (coro); 1824 Safefree (coro);
1374 }
1375 1825
1376 return 0; 1826 return 0;
1377} 1827}
1378 1828
1379static int 1829static int ecb_cold
1380coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1830coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1381{ 1831{
1382 struct coro *coro = (struct coro *)mg->mg_ptr; 1832 /* called when perl clones the current process the slow way (windows process emulation) */
1383 1833 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1384 ++coro->refcnt; 1834 mg->mg_ptr = 0;
1835 mg->mg_virtual = 0;
1385 1836
1386 return 0; 1837 return 0;
1387} 1838}
1388 1839
1389static MGVTBL coro_state_vtbl = { 1840static MGVTBL coro_state_vtbl = {
… …
1396# define MGf_DUP 0 1847# define MGf_DUP 0
1397#endif 1848#endif
1398}; 1849};
1399 1850
1400static void 1851static void
1401prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1852prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1402{ 1853{
1403 ta->prev = SvSTATE (prev_sv); 1854 ta->prev = SvSTATE (prev_sv);
1404 ta->next = SvSTATE (next_sv); 1855 ta->next = SvSTATE (next_sv);
1405 TRANSFER_CHECK (*ta); 1856 TRANSFER_CHECK (*ta);
1406} 1857}
1407 1858
1408static void 1859static void
1409api_transfer (SV *prev_sv, SV *next_sv) 1860api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1410{ 1861{
1411 dTHX;
1412 struct transfer_args ta; 1862 struct coro_transfer_args ta;
1413 1863
1414 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1864 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1415 TRANSFER (ta, 1); 1865 TRANSFER (ta, 1);
1416} 1866}
1417 1867
1418/** Coro ********************************************************************/ 1868/** Coro ********************************************************************/
1419 1869
1420static void 1870ecb_inline void
1421coro_enq (pTHX_ SV *coro_sv) 1871coro_enq (pTHX_ struct coro *coro)
1422{ 1872{
1423 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1873 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1424}
1425 1874
1426static SV * 1875 SvREFCNT_inc_NN (coro->hv);
1876
1877 coro->next_ready = 0;
1878 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1879 ready [1] = coro;
1880}
1881
1882ecb_inline struct coro *
1427coro_deq (pTHX) 1883coro_deq (pTHX)
1428{ 1884{
1429 int prio; 1885 int prio;
1430 1886
1431 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1887 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1432 if (AvFILLp (coro_ready [prio]) >= 0) 1888 {
1433 return av_shift (coro_ready [prio]); 1889 struct coro **ready = coro_ready [prio];
1890
1891 if (ready [0])
1892 {
1893 struct coro *coro = ready [0];
1894 ready [0] = coro->next_ready;
1895 return coro;
1896 }
1897 }
1434 1898
1435 return 0; 1899 return 0;
1436} 1900}
1437 1901
1902static void
1903invoke_sv_ready_hook_helper (void)
1904{
1905 dTHX;
1906 dSP;
1907
1908 ENTER;
1909 SAVETMPS;
1910
1911 PUSHMARK (SP);
1912 PUTBACK;
1913 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1914
1915 FREETMPS;
1916 LEAVE;
1917}
1918
1438static int 1919static int
1439api_ready (SV *coro_sv) 1920api_ready (pTHX_ SV *coro_sv)
1440{ 1921{
1441 dTHX;
1442 struct coro *coro;
1443 SV *sv_hook;
1444 void (*xs_hook)(void);
1445
1446 if (SvROK (coro_sv))
1447 coro_sv = SvRV (coro_sv);
1448
1449 coro = SvSTATE (coro_sv); 1922 struct coro *coro = SvSTATE (coro_sv);
1450 1923
1451 if (coro->flags & CF_READY) 1924 if (coro->flags & CF_READY)
1452 return 0; 1925 return 0;
1453 1926
1454 coro->flags |= CF_READY; 1927 coro->flags |= CF_READY;
1455 1928
1456 LOCK; 1929 coro_enq (aTHX_ coro);
1457 1930
1458 sv_hook = coro_nready ? 0 : coro_readyhook; 1931 if (!coro_nready++)
1459 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1932 if (coroapi.readyhook)
1460 1933 coroapi.readyhook ();
1461 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1462 ++coro_nready;
1463
1464 UNLOCK;
1465
1466 if (sv_hook)
1467 {
1468 dSP;
1469
1470 ENTER;
1471 SAVETMPS;
1472
1473 PUSHMARK (SP);
1474 PUTBACK;
1475 call_sv (sv_hook, G_DISCARD);
1476 SPAGAIN;
1477
1478 FREETMPS;
1479 LEAVE;
1480 }
1481
1482 if (xs_hook)
1483 xs_hook ();
1484 1934
1485 return 1; 1935 return 1;
1486} 1936}
1487 1937
1488static int 1938static int
1489api_is_ready (SV *coro_sv) 1939api_is_ready (pTHX_ SV *coro_sv)
1490{ 1940{
1491 dTHX;
1492 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1941 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1493} 1942}
1494 1943
1495static void 1944/* expects to own a reference to next->hv */
1945ecb_inline void
1496prepare_schedule (pTHX_ struct transfer_args *ta) 1946prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1497{ 1947{
1498 SV *prev_sv, *next_sv;
1499
1500 for (;;)
1501 {
1502 LOCK;
1503 next_sv = coro_deq (aTHX);
1504
1505 /* nothing to schedule: call the idle handler */
1506 if (expect_false (!next_sv))
1507 {
1508 dSP;
1509 UNLOCK;
1510
1511 ENTER;
1512 SAVETMPS;
1513
1514 PUSHMARK (SP);
1515 PUTBACK;
1516 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1517 SPAGAIN;
1518
1519 FREETMPS;
1520 LEAVE;
1521 continue;
1522 }
1523
1524 ta->next = SvSTATE (next_sv);
1525
1526 /* cannot transfer to destroyed coros, skip and look for next */
1527 if (expect_false (ta->next->flags & CF_DESTROYED))
1528 {
1529 UNLOCK;
1530 SvREFCNT_dec (next_sv);
1531 /* coro_nready is already taken care of by destroy */
1532 continue;
1533 }
1534
1535 --coro_nready;
1536 UNLOCK;
1537 break;
1538 }
1539
1540 /* free this only after the transfer */
1541 prev_sv = SvRV (coro_current); 1948 SV *prev_sv = SvRV (coro_current);
1949
1542 ta->prev = SvSTATE (prev_sv); 1950 ta->prev = SvSTATE_hv (prev_sv);
1951 ta->next = next;
1952
1543 TRANSFER_CHECK (*ta); 1953 TRANSFER_CHECK (*ta);
1544 assert (ta->next->flags & CF_READY); 1954
1545 ta->next->flags &= ~CF_READY;
1546 SvRV_set (coro_current, next_sv); 1955 SvRV_set (coro_current, (SV *)next->hv);
1547 1956
1548 LOCK;
1549 free_coro_mortal (aTHX); 1957 free_coro_mortal (aTHX);
1550 coro_mortal = prev_sv; 1958 coro_mortal = prev_sv;
1551 UNLOCK;
1552} 1959}
1553 1960
1554static void 1961static void
1962prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1963{
1964 for (;;)
1965 {
1966 struct coro *next = coro_deq (aTHX);
1967
1968 if (ecb_expect_true (next))
1969 {
1970 /* cannot transfer to destroyed coros, skip and look for next */
1971 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1972 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1973 else
1974 {
1975 next->flags &= ~CF_READY;
1976 --coro_nready;
1977
1978 prepare_schedule_to (aTHX_ ta, next);
1979 break;
1980 }
1981 }
1982 else
1983 {
1984 /* nothing to schedule: call the idle handler */
1985 if (SvROK (sv_idle)
1986 && SvOBJECT (SvRV (sv_idle)))
1987 {
1988 if (SvRV (sv_idle) == SvRV (coro_current))
1989 {
1990 require_pv ("Carp");
1991
1992 {
1993 dSP;
1994
1995 ENTER;
1996 SAVETMPS;
1997
1998 PUSHMARK (SP);
1999 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2000 PUTBACK;
2001 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2002
2003 FREETMPS;
2004 LEAVE;
2005 }
2006 }
2007
2008 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2009 api_ready (aTHX_ SvRV (sv_idle));
2010 --coro_nready;
2011 }
2012 else
2013 {
2014 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2015 dSP;
2016
2017 ENTER;
2018 SAVETMPS;
2019
2020 PUSHMARK (SP);
2021 PUTBACK;
2022 call_sv (sv_idle, G_VOID | G_DISCARD);
2023
2024 FREETMPS;
2025 LEAVE;
2026 }
2027 }
2028 }
2029}
2030
2031ecb_inline void
1555prepare_cede (pTHX_ struct transfer_args *ta) 2032prepare_cede (pTHX_ struct coro_transfer_args *ta)
1556{ 2033{
1557 api_ready (coro_current); 2034 api_ready (aTHX_ coro_current);
1558 prepare_schedule (aTHX_ ta); 2035 prepare_schedule (aTHX_ ta);
1559} 2036}
1560 2037
2038ecb_inline void
2039prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2040{
2041 SV *prev = SvRV (coro_current);
2042
2043 if (coro_nready)
2044 {
2045 prepare_schedule (aTHX_ ta);
2046 api_ready (aTHX_ prev);
2047 }
2048 else
2049 prepare_nop (aTHX_ ta);
2050}
2051
2052static void
2053api_schedule (pTHX)
2054{
2055 struct coro_transfer_args ta;
2056
2057 prepare_schedule (aTHX_ &ta);
2058 TRANSFER (ta, 1);
2059}
2060
2061static void
2062api_schedule_to (pTHX_ SV *coro_sv)
2063{
2064 struct coro_transfer_args ta;
2065 struct coro *next = SvSTATE (coro_sv);
2066
2067 SvREFCNT_inc_NN (coro_sv);
2068 prepare_schedule_to (aTHX_ &ta, next);
2069}
2070
1561static int 2071static int
1562prepare_cede_notself (pTHX_ struct transfer_args *ta) 2072api_cede (pTHX)
1563{ 2073{
1564 if (coro_nready) 2074 struct coro_transfer_args ta;
1565 { 2075
1566 SV *prev = SvRV (coro_current);
1567 prepare_schedule (aTHX_ ta); 2076 prepare_cede (aTHX_ &ta);
1568 api_ready (prev); 2077
2078 if (ecb_expect_true (ta.prev != ta.next))
2079 {
2080 TRANSFER (ta, 1);
1569 return 1; 2081 return 1;
1570 } 2082 }
1571 else 2083 else
1572 return 0; 2084 return 0;
1573} 2085}
1574 2086
1575static void
1576api_schedule (void)
1577{
1578 dTHX;
1579 struct transfer_args ta;
1580
1581 prepare_schedule (aTHX_ &ta);
1582 TRANSFER (ta, 1);
1583}
1584
1585static int 2087static int
1586api_cede (void) 2088api_cede_notself (pTHX)
1587{ 2089{
1588 dTHX; 2090 if (coro_nready)
2091 {
1589 struct transfer_args ta; 2092 struct coro_transfer_args ta;
1590 2093
1591 prepare_cede (aTHX_ &ta); 2094 prepare_cede_notself (aTHX_ &ta);
1592
1593 if (expect_true (ta.prev != ta.next))
1594 {
1595 TRANSFER (ta, 1); 2095 TRANSFER (ta, 1);
1596 return 1; 2096 return 1;
1597 } 2097 }
1598 else 2098 else
1599 return 0; 2099 return 0;
1600} 2100}
1601 2101
1602static int 2102static void
1603api_cede_notself (void)
1604{
1605 dTHX;
1606 struct transfer_args ta;
1607
1608 if (prepare_cede_notself (aTHX_ &ta))
1609 {
1610 TRANSFER (ta, 1);
1611 return 1;
1612 }
1613 else
1614 return 0;
1615}
1616
1617static void
1618api_trace (SV *coro_sv, int flags) 2103api_trace (pTHX_ SV *coro_sv, int flags)
1619{ 2104{
1620 dTHX;
1621 struct coro *coro = SvSTATE (coro_sv); 2105 struct coro *coro = SvSTATE (coro_sv);
1622 2106
2107 if (coro->flags & CF_RUNNING)
2108 croak ("cannot enable tracing on a running coroutine, caught");
2109
1623 if (flags & CC_TRACE) 2110 if (flags & CC_TRACE)
1624 { 2111 {
1625 if (!coro->cctx) 2112 if (!coro->cctx)
1626 coro->cctx = cctx_new (); 2113 coro->cctx = cctx_new_run ();
1627 else if (!(coro->cctx->flags & CC_TRACE)) 2114 else if (!(coro->cctx->flags & CC_TRACE))
1628 croak ("cannot enable tracing on coroutine with custom stack"); 2115 croak ("cannot enable tracing on coroutine with custom stack, caught");
1629 2116
1630 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2117 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1631 } 2118 }
1632 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2119 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1633 { 2120 {
… …
1638 else 2125 else
1639 coro->slot->runops = RUNOPS_DEFAULT; 2126 coro->slot->runops = RUNOPS_DEFAULT;
1640 } 2127 }
1641} 2128}
1642 2129
2130static void
2131coro_push_av (pTHX_ AV *av, I32 gimme_v)
2132{
2133 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2134 {
2135 dSP;
2136
2137 if (gimme_v == G_SCALAR)
2138 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2139 else
2140 {
2141 int i;
2142 EXTEND (SP, AvFILLp (av) + 1);
2143
2144 for (i = 0; i <= AvFILLp (av); ++i)
2145 PUSHs (AvARRAY (av)[i]);
2146 }
2147
2148 PUTBACK;
2149 }
2150}
2151
2152static void
2153coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2154{
2155 if (!coro->on_destroy)
2156 coro->on_destroy = newAV ();
2157
2158 av_push (coro->on_destroy, cb);
2159}
2160
2161static void
2162slf_destroy_join (pTHX_ struct CoroSLF *frame)
2163{
2164 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2165}
2166
1643static int 2167static int
1644coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2168slf_check_join (pTHX_ struct CoroSLF *frame)
1645{ 2169{
1646 AV *padlist; 2170 struct coro *coro = (struct coro *)frame->data;
1647 AV *av = (AV *)mg->mg_obj;
1648 2171
1649 abort (); 2172 if (!coro->status)
2173 return 1;
2174
2175 frame->destroy = 0;
2176
2177 coro_push_av (aTHX_ coro->status, GIMME_V);
2178
2179 SvREFCNT_dec ((SV *)coro->hv);
1650 2180
1651 return 0; 2181 return 0;
1652} 2182}
1653 2183
1654static MGVTBL coro_gensub_vtbl = { 2184static void
1655 0, 0, 0, 0, 2185slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1656 coro_gensub_free 2186{
1657}; 2187 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2188
2189 if (items > 1)
2190 croak ("join called with too many arguments");
2191
2192 if (coro->status)
2193 frame->prepare = prepare_nop;
2194 else
2195 {
2196 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2197 frame->prepare = prepare_schedule;
2198 }
2199
2200 frame->check = slf_check_join;
2201 frame->destroy = slf_destroy_join;
2202 frame->data = (void *)coro;
2203 SvREFCNT_inc (coro->hv);
2204}
2205
2206static void
2207coro_call_on_destroy (pTHX_ struct coro *coro)
2208{
2209 AV *od = coro->on_destroy;
2210
2211 if (!od)
2212 return;
2213
2214 coro->on_destroy = 0;
2215 sv_2mortal ((SV *)od);
2216
2217 while (AvFILLp (od) >= 0)
2218 {
2219 SV *cb = sv_2mortal (av_pop (od));
2220
2221 /* coro hv's (and only hv's at the moment) are supported as well */
2222 if (SvSTATEhv_p (aTHX_ cb))
2223 api_ready (aTHX_ cb);
2224 else
2225 {
2226 dSP; /* don't disturb outer sp */
2227 PUSHMARK (SP);
2228
2229 if (coro->status)
2230 {
2231 PUTBACK;
2232 coro_push_av (aTHX_ coro->status, G_ARRAY);
2233 SPAGAIN;
2234 }
2235
2236 PUTBACK;
2237 call_sv (cb, G_VOID | G_DISCARD);
2238 }
2239 }
2240}
2241
2242static void
2243coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2244{
2245 AV *av;
2246
2247 if (coro->status)
2248 {
2249 av = coro->status;
2250 av_clear (av);
2251 }
2252 else
2253 av = coro->status = newAV ();
2254
2255 /* items are actually not so common, so optimise for this case */
2256 if (items)
2257 {
2258 int i;
2259
2260 av_extend (av, items - 1);
2261
2262 for (i = 0; i < items; ++i)
2263 av_push (av, SvREFCNT_inc_NN (arg [i]));
2264 }
2265}
2266
2267static void
2268slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2269{
2270 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2271 api_ready (aTHX_ sv_manager);
2272
2273 frame->prepare = prepare_schedule;
2274 frame->check = slf_check_repeat;
2275
2276 /* as a minor optimisation, we could unwind all stacks here */
2277 /* but that puts extra pressure on pp_slf, and is not worth much */
2278 /*coro_unwind_stacks (aTHX);*/
2279}
2280
2281static void
2282slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 HV *coro_hv = (HV *)SvRV (coro_current);
2285
2286 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2287 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2288}
2289
2290static void
2291slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 HV *coro_hv;
2294 struct coro *coro;
2295
2296 if (items <= 0)
2297 croak ("Coro::cancel called without coro object,");
2298
2299 coro = SvSTATE (arg [0]);
2300 coro_hv = coro->hv;
2301
2302 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2303
2304 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2305 {
2306 /* coro currently busy cancelling something, so just notify it */
2307 coro->slf_frame.data = (void *)coro;
2308
2309 frame->prepare = prepare_nop;
2310 frame->check = slf_check_nop;
2311 }
2312 else if (coro_hv == (HV *)SvRV (coro_current))
2313 {
2314 /* cancelling the current coro is allowed, and equals terminate */
2315 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2316 }
2317 else
2318 {
2319 struct coro *self = SvSTATE_current;
2320
2321 if (!self)
2322 croak ("Coro::cancel called outside of thread content,");
2323
2324 /* otherwise we cancel directly, purely for speed reasons
2325 * unfortunately, this requires some magic trickery, as
2326 * somebody else could cancel us, so we have to fight the cancellation.
2327 * this is ugly, and hopefully fully worth the extra speed.
2328 * besides, I can't get the slow-but-safe version working...
2329 */
2330 slf_frame.data = 0;
2331 self->flags |= CF_NOCANCEL;
2332 coro_state_destroy (aTHX_ coro);
2333 self->flags &= ~CF_NOCANCEL;
2334
2335 if (slf_frame.data)
2336 {
2337 /* while we were busy we have been cancelled, so terminate */
2338 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2339 }
2340 else
2341 {
2342 frame->prepare = prepare_nop;
2343 frame->check = slf_check_nop;
2344 }
2345 }
2346}
2347
2348static int
2349slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2350{
2351 frame->prepare = 0;
2352 coro_unwind_stacks (aTHX);
2353
2354 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2355
2356 return 1;
2357}
2358
2359static int
2360safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2361{
2362 if (coro->cctx)
2363 croak ("coro inside C callback, unable to cancel at this time, caught");
2364
2365 if (coro->flags & CF_NEW)
2366 {
2367 coro_set_status (aTHX_ coro, arg, items);
2368 coro_state_destroy (aTHX_ coro);
2369 }
2370 else
2371 {
2372 if (!coro->slf_frame.prepare)
2373 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2374
2375 slf_destroy (aTHX_ coro);
2376
2377 coro_set_status (aTHX_ coro, arg, items);
2378 coro->slf_frame.prepare = prepare_nop;
2379 coro->slf_frame.check = slf_check_safe_cancel;
2380
2381 api_ready (aTHX_ (SV *)coro->hv);
2382 }
2383
2384 return 1;
2385}
2386
2387/*****************************************************************************/
2388/* async pool handler */
2389
2390static int
2391slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2392{
2393 HV *hv = (HV *)SvRV (coro_current);
2394 struct coro *coro = (struct coro *)frame->data;
2395
2396 if (!coro->invoke_cb)
2397 return 1; /* loop till we have invoke */
2398 else
2399 {
2400 hv_store (hv, "desc", sizeof ("desc") - 1,
2401 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2402
2403 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2404
2405 {
2406 dSP;
2407 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2408 PUTBACK;
2409 }
2410
2411 SvREFCNT_dec (GvAV (PL_defgv));
2412 GvAV (PL_defgv) = coro->invoke_av;
2413 coro->invoke_av = 0;
2414
2415 return 0;
2416 }
2417}
2418
2419static void
2420slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2421{
2422 HV *hv = (HV *)SvRV (coro_current);
2423 struct coro *coro = SvSTATE_hv ((SV *)hv);
2424
2425 if (ecb_expect_true (coro->saved_deffh))
2426 {
2427 /* subsequent iteration */
2428 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2429 coro->saved_deffh = 0;
2430
2431 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2432 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2433 {
2434 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2435 return;
2436 }
2437 else
2438 {
2439 av_clear (GvAV (PL_defgv));
2440 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2441
2442 if (ecb_expect_false (coro->swap_sv))
2443 {
2444 SWAP_SVS_LEAVE (coro);
2445 SvREFCNT_dec_NN (coro->swap_sv);
2446 coro->swap_sv = 0;
2447 }
2448
2449 coro->prio = 0;
2450
2451 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2452 api_trace (aTHX_ coro_current, 0);
2453
2454 frame->prepare = prepare_schedule;
2455 av_push (av_async_pool, SvREFCNT_inc (hv));
2456 }
2457 }
2458 else
2459 {
2460 /* first iteration, simply fall through */
2461 frame->prepare = prepare_nop;
2462 }
2463
2464 frame->check = slf_check_pool_handler;
2465 frame->data = (void *)coro;
2466}
2467
2468/*****************************************************************************/
2469/* rouse callback */
2470
2471#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2472
2473static void
2474coro_rouse_callback (pTHX_ CV *cv)
2475{
2476 dXSARGS;
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2480 {
2481 /* first call, set args */
2482 SV *coro = SvRV (data);
2483 AV *av = newAV ();
2484
2485 SvRV_set (data, (SV *)av);
2486
2487 /* better take a full copy of the arguments */
2488 while (items--)
2489 av_store (av, items, newSVsv (ST (items)));
2490
2491 api_ready (aTHX_ coro);
2492 SvREFCNT_dec (coro);
2493 }
2494
2495 XSRETURN_EMPTY;
2496}
2497
2498static int
2499slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2500{
2501 SV *data = (SV *)frame->data;
2502
2503 if (CORO_THROW)
2504 return 0;
2505
2506 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2507 return 1;
2508
2509 /* now push all results on the stack */
2510 {
2511 dSP;
2512 AV *av = (AV *)SvRV (data);
2513 int i;
2514
2515 EXTEND (SP, AvFILLp (av) + 1);
2516 for (i = 0; i <= AvFILLp (av); ++i)
2517 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2518
2519 /* we have stolen the elements, so set length to zero and free */
2520 AvFILLp (av) = -1;
2521 av_undef (av);
2522
2523 PUTBACK;
2524 }
2525
2526 return 0;
2527}
2528
2529static void
2530slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 SV *cb;
2533
2534 if (items)
2535 cb = arg [0];
2536 else
2537 {
2538 struct coro *coro = SvSTATE_current;
2539
2540 if (!coro->rouse_cb)
2541 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2542
2543 cb = sv_2mortal (coro->rouse_cb);
2544 coro->rouse_cb = 0;
2545 }
2546
2547 if (!SvROK (cb)
2548 || SvTYPE (SvRV (cb)) != SVt_PVCV
2549 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2550 croak ("Coro::rouse_wait called with illegal callback argument,");
2551
2552 {
2553 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2554 SV *data = (SV *)S_GENSUB_ARG;
2555
2556 frame->data = (void *)data;
2557 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2558 frame->check = slf_check_rouse_wait;
2559 }
2560}
2561
2562static SV *
2563coro_new_rouse_cb (pTHX)
2564{
2565 HV *hv = (HV *)SvRV (coro_current);
2566 struct coro *coro = SvSTATE_hv (hv);
2567 SV *data = newRV_inc ((SV *)hv);
2568 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2569
2570 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2571 SvREFCNT_dec (data); /* magicext increases the refcount */
2572
2573 SvREFCNT_dec (coro->rouse_cb);
2574 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2575
2576 return cb;
2577}
2578
2579/*****************************************************************************/
2580/* schedule-like-function opcode (SLF) */
2581
2582static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2583static const CV *slf_cv;
2584static SV **slf_argv;
2585static int slf_argc, slf_arga; /* count, allocated */
2586static I32 slf_ax; /* top of stack, for restore */
2587
2588/* this restores the stack in the case we patched the entersub, to */
2589/* recreate the stack frame as perl will on following calls */
2590/* since entersub cleared the stack */
2591static OP *
2592pp_restore (pTHX)
2593{
2594 int i;
2595 SV **SP = PL_stack_base + slf_ax;
2596
2597 PUSHMARK (SP);
2598
2599 EXTEND (SP, slf_argc + 1);
2600
2601 for (i = 0; i < slf_argc; ++i)
2602 PUSHs (sv_2mortal (slf_argv [i]));
2603
2604 PUSHs ((SV *)CvGV (slf_cv));
2605
2606 RETURNOP (slf_restore.op_first);
2607}
2608
2609static void
2610slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2611{
2612 SV **arg = (SV **)slf_frame.data;
2613
2614 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2615}
2616
2617static void
2618slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 if (items != 2)
2621 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2622
2623 frame->prepare = slf_prepare_transfer;
2624 frame->check = slf_check_nop;
2625 frame->data = (void *)arg; /* let's hope it will stay valid */
2626}
2627
2628static void
2629slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2630{
2631 frame->prepare = prepare_schedule;
2632 frame->check = slf_check_nop;
2633}
2634
2635static void
2636slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2637{
2638 struct coro *next = (struct coro *)slf_frame.data;
2639
2640 SvREFCNT_inc_NN (next->hv);
2641 prepare_schedule_to (aTHX_ ta, next);
2642}
2643
2644static void
2645slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 if (!items)
2648 croak ("Coro::schedule_to expects a coroutine argument, caught");
2649
2650 frame->data = (void *)SvSTATE (arg [0]);
2651 frame->prepare = slf_prepare_schedule_to;
2652 frame->check = slf_check_nop;
2653}
2654
2655static void
2656slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2657{
2658 api_ready (aTHX_ SvRV (coro_current));
2659
2660 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2661}
2662
2663static void
2664slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2665{
2666 frame->prepare = prepare_cede;
2667 frame->check = slf_check_nop;
2668}
2669
2670static void
2671slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2672{
2673 frame->prepare = prepare_cede_notself;
2674 frame->check = slf_check_nop;
2675}
2676
2677/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2678static void
2679slf_destroy (pTHX_ struct coro *coro)
2680{
2681 struct CoroSLF frame = coro->slf_frame;
2682
2683 /*
2684 * The on_destroy below most likely is from an SLF call.
2685 * Since by definition the SLF call will not finish when we destroy
2686 * the coro, we will have to force-finish it here, otherwise
2687 * cleanup functions cannot call SLF functions.
2688 */
2689 coro->slf_frame.prepare = 0;
2690
2691 /* this callback is reserved for slf functions needing to do cleanup */
2692 if (frame.destroy && frame.prepare && !PL_dirty)
2693 frame.destroy (aTHX_ &frame);
2694}
2695
2696/*
2697 * these not obviously related functions are all rolled into one
2698 * function to increase chances that they all will call transfer with the same
2699 * stack offset
2700 * SLF stands for "schedule-like-function".
2701 */
2702static OP *
2703pp_slf (pTHX)
2704{
2705 I32 checkmark; /* mark SP to see how many elements check has pushed */
2706
2707 /* set up the slf frame, unless it has already been set-up */
2708 /* the latter happens when a new coro has been started */
2709 /* or when a new cctx was attached to an existing coroutine */
2710 if (ecb_expect_true (!slf_frame.prepare))
2711 {
2712 /* first iteration */
2713 dSP;
2714 SV **arg = PL_stack_base + TOPMARK + 1;
2715 int items = SP - arg; /* args without function object */
2716 SV *gv = *sp;
2717
2718 /* do a quick consistency check on the "function" object, and if it isn't */
2719 /* for us, divert to the real entersub */
2720 if (SvTYPE (gv) != SVt_PVGV
2721 || !GvCV (gv)
2722 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2723 return PL_ppaddr[OP_ENTERSUB](aTHX);
2724
2725 if (!(PL_op->op_flags & OPf_STACKED))
2726 {
2727 /* ampersand-form of call, use @_ instead of stack */
2728 AV *av = GvAV (PL_defgv);
2729 arg = AvARRAY (av);
2730 items = AvFILLp (av) + 1;
2731 }
2732
2733 /* now call the init function, which needs to set up slf_frame */
2734 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2735 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2736
2737 /* pop args */
2738 SP = PL_stack_base + POPMARK;
2739
2740 PUTBACK;
2741 }
2742
2743 /* now that we have a slf_frame, interpret it! */
2744 /* we use a callback system not to make the code needlessly */
2745 /* complicated, but so we can run multiple perl coros from one cctx */
2746
2747 do
2748 {
2749 struct coro_transfer_args ta;
2750
2751 slf_frame.prepare (aTHX_ &ta);
2752 TRANSFER (ta, 0);
2753
2754 checkmark = PL_stack_sp - PL_stack_base;
2755 }
2756 while (slf_frame.check (aTHX_ &slf_frame));
2757
2758 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2759
2760 /* exception handling */
2761 if (ecb_expect_false (CORO_THROW))
2762 {
2763 SV *exception = sv_2mortal (CORO_THROW);
2764
2765 CORO_THROW = 0;
2766 sv_setsv (ERRSV, exception);
2767 croak (0);
2768 }
2769
2770 /* return value handling - mostly like entersub */
2771 /* make sure we put something on the stack in scalar context */
2772 if (GIMME_V == G_SCALAR
2773 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2774 {
2775 dSP;
2776 SV **bot = PL_stack_base + checkmark;
2777
2778 if (sp == bot) /* too few, push undef */
2779 bot [1] = &PL_sv_undef;
2780 else /* too many, take last one */
2781 bot [1] = *sp;
2782
2783 SP = bot + 1;
2784
2785 PUTBACK;
2786 }
2787
2788 return NORMAL;
2789}
2790
2791static void
2792api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2793{
2794 int i;
2795 SV **arg = PL_stack_base + ax;
2796 int items = PL_stack_sp - arg + 1;
2797
2798 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2799
2800 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2801 && PL_op->op_ppaddr != pp_slf)
2802 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2803
2804 CvFLAGS (cv) |= CVf_SLF;
2805 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2806 slf_cv = cv;
2807
2808 /* we patch the op, and then re-run the whole call */
2809 /* we have to put the same argument on the stack for this to work */
2810 /* and this will be done by pp_restore */
2811 slf_restore.op_next = (OP *)&slf_restore;
2812 slf_restore.op_type = OP_CUSTOM;
2813 slf_restore.op_ppaddr = pp_restore;
2814 slf_restore.op_first = PL_op;
2815
2816 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2817
2818 if (PL_op->op_flags & OPf_STACKED)
2819 {
2820 if (items > slf_arga)
2821 {
2822 slf_arga = items;
2823 Safefree (slf_argv);
2824 New (0, slf_argv, slf_arga, SV *);
2825 }
2826
2827 slf_argc = items;
2828
2829 for (i = 0; i < items; ++i)
2830 slf_argv [i] = SvREFCNT_inc (arg [i]);
2831 }
2832 else
2833 slf_argc = 0;
2834
2835 PL_op->op_ppaddr = pp_slf;
2836 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2837
2838 PL_op = (OP *)&slf_restore;
2839}
2840
2841/*****************************************************************************/
2842/* dynamic wind */
2843
2844static void
2845on_enterleave_call (pTHX_ SV *cb)
2846{
2847 dSP;
2848
2849 PUSHSTACK;
2850
2851 PUSHMARK (SP);
2852 PUTBACK;
2853 call_sv (cb, G_VOID | G_DISCARD);
2854 SPAGAIN;
2855
2856 POPSTACK;
2857}
2858
2859static SV *
2860coro_avp_pop_and_free (pTHX_ AV **avp)
2861{
2862 AV *av = *avp;
2863 SV *res = av_pop (av);
2864
2865 if (AvFILLp (av) < 0)
2866 {
2867 *avp = 0;
2868 SvREFCNT_dec (av);
2869 }
2870
2871 return res;
2872}
2873
2874static void
2875coro_pop_on_enter (pTHX_ void *coro)
2876{
2877 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2878 SvREFCNT_dec (cb);
2879}
2880
2881static void
2882coro_pop_on_leave (pTHX_ void *coro)
2883{
2884 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2885 on_enterleave_call (aTHX_ sv_2mortal (cb));
2886}
2887
2888static void
2889enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2890{
2891 if (!hook)
2892 return;
2893
2894 if (!*avp)
2895 {
2896 *avp = newAV ();
2897 AvREAL_off (*avp);
2898 }
2899
2900 av_push (*avp, (SV *)hook);
2901 av_push (*avp, (SV *)arg);
2902}
2903
2904static void
2905enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2906{
2907 AV *av = *avp;
2908 int i;
2909
2910 if (!av)
2911 return;
2912
2913 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2914 if (AvARRAY (av)[i] == (SV *)hook)
2915 {
2916 if (execute)
2917 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2918
2919 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2920 av_pop (av);
2921 av_pop (av);
2922 break;
2923 }
2924
2925 if (AvFILLp (av) >= 0)
2926 {
2927 *avp = 0;
2928 SvREFCNT_dec_NN (av);
2929 }
2930}
2931
2932static void
2933api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2934{
2935 struct coro *coro = SvSTATE (coro_sv);
2936
2937 if (SvSTATE_current == coro)
2938 if (enter)
2939 enter (aTHX_ enter_arg);
2940
2941 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2942 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2943}
2944
2945static void
2946api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2947{
2948 struct coro *coro = SvSTATE (coro_sv);
2949
2950 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2951 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2952}
2953
2954static void
2955savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2956{
2957 struct coro *coro = SvSTATE_current;
2958
2959 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2960}
2961
2962static void
2963savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2964{
2965 struct coro *coro = SvSTATE_current;
2966
2967 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2968}
2969
2970static void
2971api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2972{
2973 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2974
2975 /* this ought to be much cheaper than malloc + a single destructor call */
2976 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2977 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2978}
1658 2979
1659/*****************************************************************************/ 2980/*****************************************************************************/
1660/* PerlIO::cede */ 2981/* PerlIO::cede */
1661 2982
1662typedef struct 2983typedef struct
1663{ 2984{
1664 PerlIOBuf base; 2985 PerlIOBuf base;
1665 NV next, every; 2986 NV next, every;
1666} PerlIOCede; 2987} PerlIOCede;
1667 2988
1668static IV 2989static IV ecb_cold
1669PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab) 2990PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1670{ 2991{
1671 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2992 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1672 2993
1673 self->every = SvCUR (arg) ? SvNV (arg) : 0.01; 2994 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1674 self->next = nvtime () + self->every; 2995 self->next = nvtime () + self->every;
1675 2996
1676 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab); 2997 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1677} 2998}
1678 2999
1679static SV * 3000static SV * ecb_cold
1680PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags) 3001PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1681{ 3002{
1682 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 3003 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1683 3004
1684 return newSVnv (self->every); 3005 return newSVnv (self->every);
… …
1690 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 3011 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1691 double now = nvtime (); 3012 double now = nvtime ();
1692 3013
1693 if (now >= self->next) 3014 if (now >= self->next)
1694 { 3015 {
1695 api_cede (); 3016 api_cede (aTHX);
1696 self->next = now + self->every; 3017 self->next = now + self->every;
1697 } 3018 }
1698 3019
1699 return PerlIOBuf_flush (aTHX_ f); 3020 return PerlIOBuf_flush (aTHX_ f);
1700} 3021}
… …
1729 PerlIOBuf_get_ptr, 3050 PerlIOBuf_get_ptr,
1730 PerlIOBuf_get_cnt, 3051 PerlIOBuf_get_cnt,
1731 PerlIOBuf_set_ptrcnt, 3052 PerlIOBuf_set_ptrcnt,
1732}; 3053};
1733 3054
3055/*****************************************************************************/
3056/* Coro::Semaphore & Coro::Signal */
3057
3058static SV *
3059coro_waitarray_new (pTHX_ int count)
3060{
3061 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3062 AV *av = newAV ();
3063 SV **ary;
3064
3065 /* unfortunately, building manually saves memory */
3066 Newx (ary, 2, SV *);
3067 AvALLOC (av) = ary;
3068#if PERL_VERSION_ATLEAST (5,10,0)
3069 AvARRAY (av) = ary;
3070#else
3071 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3072 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3073 SvPVX ((SV *)av) = (char *)ary;
3074#endif
3075 AvMAX (av) = 1;
3076 AvFILLp (av) = 0;
3077 ary [0] = newSViv (count);
3078
3079 return newRV_noinc ((SV *)av);
3080}
3081
3082/* semaphore */
3083
3084static void
3085coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3086{
3087 SV *count_sv = AvARRAY (av)[0];
3088 IV count = SvIVX (count_sv);
3089
3090 count += adjust;
3091 SvIVX (count_sv) = count;
3092
3093 /* now wake up as many waiters as are expected to lock */
3094 while (count > 0 && AvFILLp (av) > 0)
3095 {
3096 SV *cb;
3097
3098 /* swap first two elements so we can shift a waiter */
3099 AvARRAY (av)[0] = AvARRAY (av)[1];
3100 AvARRAY (av)[1] = count_sv;
3101 cb = av_shift (av);
3102
3103 if (SvOBJECT (cb))
3104 {
3105 api_ready (aTHX_ cb);
3106 --count;
3107 }
3108 else if (SvTYPE (cb) == SVt_PVCV)
3109 {
3110 dSP;
3111 PUSHMARK (SP);
3112 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3113 PUTBACK;
3114 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3115 }
3116
3117 SvREFCNT_dec_NN (cb);
3118 }
3119}
3120
3121static void
3122coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3123{
3124 /* call $sem->adjust (0) to possibly wake up some other waiters */
3125 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3126}
3127
3128static int
3129slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3130{
3131 AV *av = (AV *)frame->data;
3132 SV *count_sv = AvARRAY (av)[0];
3133 SV *coro_hv = SvRV (coro_current);
3134
3135 frame->destroy = 0;
3136
3137 /* if we are about to throw, don't actually acquire the lock, just throw */
3138 if (ecb_expect_false (CORO_THROW))
3139 {
3140 /* we still might be responsible for the semaphore, so wake up others */
3141 coro_semaphore_adjust (aTHX_ av, 0);
3142
3143 return 0;
3144 }
3145 else if (SvIVX (count_sv) > 0)
3146 {
3147 if (acquire)
3148 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3149 else
3150 coro_semaphore_adjust (aTHX_ av, 0);
3151
3152 return 0;
3153 }
3154 else
3155 {
3156 int i;
3157 /* if we were woken up but can't down, we look through the whole */
3158 /* waiters list and only add us if we aren't in there already */
3159 /* this avoids some degenerate memory usage cases */
3160 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3161 if (AvARRAY (av)[i] == coro_hv)
3162 return 1;
3163
3164 av_push (av, SvREFCNT_inc (coro_hv));
3165 return 1;
3166 }
3167}
3168
3169static int
3170slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3171{
3172 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3173}
3174
3175static int
3176slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3177{
3178 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3179}
3180
3181static void
3182slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3183{
3184 AV *av = (AV *)SvRV (arg [0]);
3185
3186 if (SvIVX (AvARRAY (av)[0]) > 0)
3187 {
3188 frame->data = (void *)av;
3189 frame->prepare = prepare_nop;
3190 }
3191 else
3192 {
3193 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3194
3195 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3196 frame->prepare = prepare_schedule;
3197 /* to avoid race conditions when a woken-up coro gets terminated */
3198 /* we arrange for a temporary on_destroy that calls adjust (0) */
3199 frame->destroy = coro_semaphore_destroy;
3200 }
3201}
3202
3203static void
3204slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3205{
3206 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3207 frame->check = slf_check_semaphore_down;
3208}
3209
3210static void
3211slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3212{
3213 if (items >= 2)
3214 {
3215 /* callback form */
3216 AV *av = (AV *)SvRV (arg [0]);
3217 SV *cb_cv = s_get_cv_croak (arg [1]);
3218
3219 av_push (av, SvREFCNT_inc_NN (cb_cv));
3220
3221 if (SvIVX (AvARRAY (av)[0]) > 0)
3222 coro_semaphore_adjust (aTHX_ av, 0);
3223
3224 frame->prepare = prepare_nop;
3225 frame->check = slf_check_nop;
3226 }
3227 else
3228 {
3229 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3230 frame->check = slf_check_semaphore_wait;
3231 }
3232}
3233
3234/* signal */
3235
3236static void
3237coro_signal_wake (pTHX_ AV *av, int count)
3238{
3239 SvIVX (AvARRAY (av)[0]) = 0;
3240
3241 /* now signal count waiters */
3242 while (count > 0 && AvFILLp (av) > 0)
3243 {
3244 SV *cb;
3245
3246 /* swap first two elements so we can shift a waiter */
3247 cb = AvARRAY (av)[0];
3248 AvARRAY (av)[0] = AvARRAY (av)[1];
3249 AvARRAY (av)[1] = cb;
3250
3251 cb = av_shift (av);
3252
3253 if (SvTYPE (cb) == SVt_PVCV)
3254 {
3255 dSP;
3256 PUSHMARK (SP);
3257 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3258 PUTBACK;
3259 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3260 }
3261 else
3262 {
3263 api_ready (aTHX_ cb);
3264 sv_setiv (cb, 0); /* signal waiter */
3265 }
3266
3267 SvREFCNT_dec_NN (cb);
3268
3269 --count;
3270 }
3271}
3272
3273static int
3274slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3275{
3276 /* if we are about to throw, also stop waiting */
3277 return SvROK ((SV *)frame->data) && !CORO_THROW;
3278}
3279
3280static void
3281slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3282{
3283 AV *av = (AV *)SvRV (arg [0]);
3284
3285 if (items >= 2)
3286 {
3287 SV *cb_cv = s_get_cv_croak (arg [1]);
3288 av_push (av, SvREFCNT_inc_NN (cb_cv));
3289
3290 if (SvIVX (AvARRAY (av)[0]))
3291 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3292
3293 frame->prepare = prepare_nop;
3294 frame->check = slf_check_nop;
3295 }
3296 else if (SvIVX (AvARRAY (av)[0]))
3297 {
3298 SvIVX (AvARRAY (av)[0]) = 0;
3299 frame->prepare = prepare_nop;
3300 frame->check = slf_check_nop;
3301 }
3302 else
3303 {
3304 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3305
3306 av_push (av, waiter);
3307
3308 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3309 frame->prepare = prepare_schedule;
3310 frame->check = slf_check_signal_wait;
3311 }
3312}
3313
3314/*****************************************************************************/
3315/* Coro::AIO */
3316
3317#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3318
3319/* helper storage struct */
3320struct io_state
3321{
3322 int errorno;
3323 I32 laststype; /* U16 in 5.10.0 */
3324 int laststatval;
3325 Stat_t statcache;
3326};
3327
3328static void
3329coro_aio_callback (pTHX_ CV *cv)
3330{
3331 dXSARGS;
3332 AV *state = (AV *)S_GENSUB_ARG;
3333 SV *coro = av_pop (state);
3334 SV *data_sv = newSV (sizeof (struct io_state));
3335
3336 av_extend (state, items - 1);
3337
3338 sv_upgrade (data_sv, SVt_PV);
3339 SvCUR_set (data_sv, sizeof (struct io_state));
3340 SvPOK_only (data_sv);
3341
3342 {
3343 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3344
3345 data->errorno = errno;
3346 data->laststype = PL_laststype;
3347 data->laststatval = PL_laststatval;
3348 data->statcache = PL_statcache;
3349 }
3350
3351 /* now build the result vector out of all the parameters and the data_sv */
3352 {
3353 int i;
3354
3355 for (i = 0; i < items; ++i)
3356 av_push (state, SvREFCNT_inc_NN (ST (i)));
3357 }
3358
3359 av_push (state, data_sv);
3360
3361 api_ready (aTHX_ coro);
3362 SvREFCNT_dec_NN (coro);
3363 SvREFCNT_dec_NN ((AV *)state);
3364}
3365
3366static int
3367slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3368{
3369 AV *state = (AV *)frame->data;
3370
3371 /* if we are about to throw, return early */
3372 /* this does not cancel the aio request, but at least */
3373 /* it quickly returns */
3374 if (CORO_THROW)
3375 return 0;
3376
3377 /* one element that is an RV? repeat! */
3378 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3379 return 1;
3380
3381 /* restore status */
3382 {
3383 SV *data_sv = av_pop (state);
3384 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3385
3386 errno = data->errorno;
3387 PL_laststype = data->laststype;
3388 PL_laststatval = data->laststatval;
3389 PL_statcache = data->statcache;
3390
3391 SvREFCNT_dec_NN (data_sv);
3392 }
3393
3394 /* push result values */
3395 {
3396 dSP;
3397 int i;
3398
3399 EXTEND (SP, AvFILLp (state) + 1);
3400 for (i = 0; i <= AvFILLp (state); ++i)
3401 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3402
3403 PUTBACK;
3404 }
3405
3406 return 0;
3407}
3408
3409static void
3410slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3411{
3412 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3413 SV *coro_hv = SvRV (coro_current);
3414 struct coro *coro = SvSTATE_hv (coro_hv);
3415
3416 /* put our coroutine id on the state arg */
3417 av_push (state, SvREFCNT_inc_NN (coro_hv));
3418
3419 /* first see whether we have a non-zero priority and set it as AIO prio */
3420 if (coro->prio)
3421 {
3422 dSP;
3423
3424 static SV *prio_cv;
3425 static SV *prio_sv;
3426
3427 if (ecb_expect_false (!prio_cv))
3428 {
3429 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3430 prio_sv = newSViv (0);
3431 }
3432
3433 PUSHMARK (SP);
3434 sv_setiv (prio_sv, coro->prio);
3435 XPUSHs (prio_sv);
3436
3437 PUTBACK;
3438 call_sv (prio_cv, G_VOID | G_DISCARD);
3439 }
3440
3441 /* now call the original request */
3442 {
3443 dSP;
3444 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3445 int i;
3446
3447 PUSHMARK (SP);
3448
3449 /* first push all args to the stack */
3450 EXTEND (SP, items + 1);
3451
3452 for (i = 0; i < items; ++i)
3453 PUSHs (arg [i]);
3454
3455 /* now push the callback closure */
3456 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3457
3458 /* now call the AIO function - we assume our request is uncancelable */
3459 PUTBACK;
3460 call_sv ((SV *)req, G_VOID | G_DISCARD);
3461 }
3462
3463 /* now that the request is going, we loop till we have a result */
3464 frame->data = (void *)state;
3465 frame->prepare = prepare_schedule;
3466 frame->check = slf_check_aio_req;
3467}
3468
3469static void
3470coro_aio_req_xs (pTHX_ CV *cv)
3471{
3472 dXSARGS;
3473
3474 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3475
3476 XSRETURN_EMPTY;
3477}
3478
3479/*****************************************************************************/
3480
3481#if CORO_CLONE
3482# include "clone.c"
3483#endif
3484
3485/*****************************************************************************/
3486
3487static SV *
3488coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3489{
3490 SV *coro_sv;
3491 struct coro *coro;
3492 MAGIC *mg;
3493 HV *hv;
3494 SV *cb;
3495 int i;
3496
3497 if (argc > 0)
3498 {
3499 cb = s_get_cv_croak (argv [0]);
3500
3501 if (!is_coro)
3502 {
3503 if (CvISXSUB (cb))
3504 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3505
3506 if (!CvROOT (cb))
3507 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3508 }
3509 }
3510
3511 Newz (0, coro, 1, struct coro);
3512 coro->args = newAV ();
3513 coro->flags = CF_NEW;
3514
3515 if (coro_first) coro_first->prev = coro;
3516 coro->next = coro_first;
3517 coro_first = coro;
3518
3519 coro->hv = hv = newHV ();
3520 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3521 mg->mg_flags |= MGf_DUP;
3522 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3523
3524 if (argc > 0)
3525 {
3526 av_extend (coro->args, argc + is_coro - 1);
3527
3528 if (is_coro)
3529 {
3530 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3531 cb = (SV *)cv_coro_run;
3532 }
3533
3534 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3535
3536 for (i = 1; i < argc; i++)
3537 av_push (coro->args, newSVsv (argv [i]));
3538 }
3539
3540 return coro_sv;
3541}
3542
3543#ifndef __cplusplus
3544ecb_cold XS(boot_Coro__State);
3545#endif
3546
3547#if CORO_JIT
3548
3549static void ecb_noinline ecb_cold
3550pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3551{
3552 dSP;
3553 AV *av = newAV ();
3554
3555 av_store (av, 3, newSVuv (d));
3556 av_store (av, 2, newSVuv (c));
3557 av_store (av, 1, newSVuv (b));
3558 av_store (av, 0, newSVuv (a));
3559
3560 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3561
3562 PUTBACK;
3563}
3564
3565static void ecb_noinline ecb_cold
3566jit_init (pTHX)
3567{
3568 dSP;
3569 SV *load, *save;
3570 char *map_base;
3571 char *load_ptr, *save_ptr;
3572 STRLEN load_len, save_len, map_len;
3573 int count;
3574
3575 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3576
3577 PUSHMARK (SP);
3578 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3579 #include "state.h"
3580 count = call_pv ("Coro::State::_jit", G_ARRAY);
3581 SPAGAIN;
3582
3583 save = POPs; save_ptr = SvPVbyte (save, save_len);
3584 load = POPs; load_ptr = SvPVbyte (load, load_len);
3585
3586 map_len = load_len + save_len + 16;
3587
3588 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3589
3590 if (map_base == (char *)MAP_FAILED)
3591 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3592
3593 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3594
3595 load_perl_slots = (load_save_perl_slots_type)map_base;
3596 memcpy (map_base, load_ptr, load_len);
3597
3598 map_base += (load_len + 15) & ~15;
3599
3600 save_perl_slots = (load_save_perl_slots_type)map_base;
3601 memcpy (map_base, save_ptr, save_len);
3602
3603 /* we are good citizens and try to make the page read-only, so the evil evil */
3604 /* hackers might have it a bit more difficult */
3605 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3606
3607 PUTBACK;
3608 eval_pv ("undef &Coro::State::_jit", 1);
3609}
3610
3611#endif
1734 3612
1735MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3613MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1736 3614
1737PROTOTYPES: DISABLE 3615PROTOTYPES: DISABLE
1738 3616
1739BOOT: 3617BOOT:
1740{ 3618{
3619#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3620#include "state.h"
1741#ifdef USE_ITHREADS 3621#ifdef USE_ITHREADS
1742 MUTEX_INIT (&coro_mutex); 3622# if CORO_PTHREAD
3623 coro_thx = PERL_GET_CONTEXT;
1743#endif 3624# endif
1744 BOOT_PAGESIZE; 3625#endif
3626 /* perl defines these to check for existance first, but why it doesn't */
3627 /* just create them one at init time is not clear to me, except for */
3628 /* programs trying to delete them, but... */
3629 /* anyway, we declare this as invalid and make sure they are initialised here */
3630 DEFSV;
3631 ERRSV;
3632
3633 cctx_current = cctx_new_empty ();
1745 3634
1746 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3635 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1747 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3636 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1748 3637
1749 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3638 {
1750 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3639 /*
1751 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr; 3640 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3641 * by coro_sig_vtbl in hash values.
3642 */
3643 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3644
3645 /* this only works if perl doesn't have a vtbl for %SIG */
3646 assert (!mg->mg_virtual);
3647
3648 /*
3649 * The irony is that the perl API itself asserts that mg_virtual
3650 * must be non-const, yet perl5porters insisted on marking their
3651 * vtbls as read-only, just to thwart perl modules from patching
3652 * them.
3653 */
3654 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3655 mg->mg_flags |= MGf_COPY;
3656
3657 coro_sigelem_vtbl = PL_vtbl_sigelem;
3658 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3659 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3660 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3661 }
1752 3662
1753 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1754 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3663 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1755 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3664 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1756 3665
1757 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3666 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1758 3667
… …
1765 main_top_env = PL_top_env; 3674 main_top_env = PL_top_env;
1766 3675
1767 while (main_top_env->je_prev) 3676 while (main_top_env->je_prev)
1768 main_top_env = main_top_env->je_prev; 3677 main_top_env = main_top_env->je_prev;
1769 3678
1770 coroapi.ver = CORO_API_VERSION;
1771 coroapi.rev = CORO_API_REVISION;
1772 coroapi.transfer = api_transfer;
1773
1774 { 3679 {
1775 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3680 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
1776 3681
1777 if (!svp) croak ("Time::HiRes is required"); 3682 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
1778 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3683 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
1779 3684
1780 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3685 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3686 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
1781 } 3687 }
1782 3688
3689 coroapi.ver = CORO_API_VERSION;
3690 coroapi.rev = CORO_API_REVISION;
3691
3692 coroapi.transfer = api_transfer;
3693
3694 coroapi.sv_state = SvSTATE_;
3695 coroapi.execute_slf = api_execute_slf;
3696 coroapi.prepare_nop = prepare_nop;
3697 coroapi.prepare_schedule = prepare_schedule;
3698 coroapi.prepare_cede = prepare_cede;
3699 coroapi.prepare_cede_notself = prepare_cede_notself;
3700
3701 time_init (aTHX);
3702
1783 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3703 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3704#if CORO_JIT
3705 PUTBACK;
3706 jit_init (aTHX);
3707 SPAGAIN;
3708#endif
1784} 3709}
1785 3710
1786SV * 3711SV *
1787new (char *klass, ...) 3712new (SV *klass, ...)
3713 ALIAS:
3714 Coro::new = 1
1788 CODE: 3715 CODE:
1789{ 3716 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1790 struct coro *coro;
1791 MAGIC *mg;
1792 HV *hv;
1793 int i;
1794
1795 Newz (0, coro, 1, struct coro);
1796 coro->args = newAV ();
1797 coro->flags = CF_NEW;
1798
1799 if (coro_first) coro_first->prev = coro;
1800 coro->next = coro_first;
1801 coro_first = coro;
1802
1803 coro->hv = hv = newHV ();
1804 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1805 mg->mg_flags |= MGf_DUP;
1806 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1807
1808 av_extend (coro->args, items - 1);
1809 for (i = 1; i < items; i++)
1810 av_push (coro->args, newSVsv (ST (i)));
1811}
1812 OUTPUT:
1813 RETVAL
1814
1815# these not obviously related functions are all rolled into the same xs
1816# function to increase chances that they all will call transfer with the same
1817# stack offset
1818void
1819_set_stacklevel (...)
1820 ALIAS:
1821 Coro::State::transfer = 1
1822 Coro::schedule = 2
1823 Coro::cede = 3
1824 Coro::cede_notself = 4
1825 CODE:
1826{
1827 struct transfer_args ta;
1828
1829 PUTBACK;
1830 switch (ix)
1831 {
1832 case 0:
1833 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1834 ta.next = 0;
1835 break;
1836
1837 case 1:
1838 if (items != 2)
1839 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1840
1841 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1842 break;
1843
1844 case 2:
1845 prepare_schedule (aTHX_ &ta);
1846 break;
1847
1848 case 3:
1849 prepare_cede (aTHX_ &ta);
1850 break;
1851
1852 case 4:
1853 if (!prepare_cede_notself (aTHX_ &ta))
1854 XSRETURN_EMPTY;
1855
1856 break;
1857 }
1858 SPAGAIN;
1859
1860 BARRIER;
1861 PUTBACK;
1862 TRANSFER (ta, 0);
1863 SPAGAIN; /* might be the sp of a different coroutine now */
1864 /* be extra careful not to ever do anything after TRANSFER */
1865}
1866
1867bool
1868_destroy (SV *coro_sv)
1869 CODE:
1870 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1871 OUTPUT: 3717 OUTPUT:
1872 RETVAL 3718 RETVAL
1873 3719
1874void 3720void
1875_exit (int code) 3721transfer (...)
1876 PROTOTYPE: $ 3722 PROTOTYPE: $$
1877 CODE: 3723 CODE:
1878 _exit (code); 3724 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3725
3726SV *
3727clone (Coro::State coro)
3728 CODE:
3729{
3730#if CORO_CLONE
3731 struct coro *ncoro = coro_clone (aTHX_ coro);
3732 MAGIC *mg;
3733 /* TODO: too much duplication */
3734 ncoro->hv = newHV ();
3735 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3736 mg->mg_flags |= MGf_DUP;
3737 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3738#else
3739 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3740#endif
3741}
3742 OUTPUT:
3743 RETVAL
1879 3744
1880int 3745int
1881cctx_stacksize (int new_stacksize = 0) 3746cctx_stacksize (int new_stacksize = 0)
3747 PROTOTYPE: ;$
1882 CODE: 3748 CODE:
1883 RETVAL = coro_stacksize; 3749 RETVAL = cctx_stacksize;
1884 if (new_stacksize) 3750 if (new_stacksize)
3751 {
1885 coro_stacksize = new_stacksize; 3752 cctx_stacksize = new_stacksize;
3753 ++cctx_gen;
3754 }
1886 OUTPUT: 3755 OUTPUT:
1887 RETVAL 3756 RETVAL
1888 3757
1889int 3758int
3759cctx_max_idle (int max_idle = 0)
3760 PROTOTYPE: ;$
3761 CODE:
3762 RETVAL = cctx_max_idle;
3763 if (max_idle > 1)
3764 cctx_max_idle = max_idle;
3765 OUTPUT:
3766 RETVAL
3767
3768int
1890cctx_count () 3769cctx_count ()
3770 PROTOTYPE:
1891 CODE: 3771 CODE:
1892 RETVAL = cctx_count; 3772 RETVAL = cctx_count;
1893 OUTPUT: 3773 OUTPUT:
1894 RETVAL 3774 RETVAL
1895 3775
1896int 3776int
1897cctx_idle () 3777cctx_idle ()
3778 PROTOTYPE:
1898 CODE: 3779 CODE:
1899 RETVAL = cctx_idle; 3780 RETVAL = cctx_idle;
1900 OUTPUT: 3781 OUTPUT:
1901 RETVAL 3782 RETVAL
1902 3783
1903void 3784void
1904list () 3785list ()
3786 PROTOTYPE:
1905 PPCODE: 3787 PPCODE:
1906{ 3788{
1907 struct coro *coro; 3789 struct coro *coro;
1908 for (coro = coro_first; coro; coro = coro->next) 3790 for (coro = coro_first; coro; coro = coro->next)
1909 if (coro->hv) 3791 if (coro->hv)
1910 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3792 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1911} 3793}
1912 3794
… …
1916 eval = 1 3798 eval = 1
1917 CODE: 3799 CODE:
1918{ 3800{
1919 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3801 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1920 { 3802 {
1921 struct coro temp; 3803 struct coro *current = SvSTATE_current;
3804 struct CoroSLF slf_save;
1922 3805
1923 if (!(coro->flags & CF_RUNNING)) 3806 if (current != coro)
1924 { 3807 {
1925 PUTBACK; 3808 PUTBACK;
1926 save_perl (aTHX_ &temp); 3809 save_perl (aTHX_ current);
1927 load_perl (aTHX_ coro); 3810 load_perl (aTHX_ coro);
3811 /* the coro is most likely in an active SLF call.
3812 * while not strictly required (the code we execute is
3813 * not allowed to call any SLF functions), it's cleaner
3814 * to reinitialise the slf_frame and restore it later.
3815 * This might one day allow us to actually do SLF calls
3816 * from code executed here.
3817 */
3818 slf_save = slf_frame;
3819 slf_frame.prepare = 0;
3820 SPAGAIN;
1928 } 3821 }
1929 3822
1930 {
1931 dSP;
1932 ENTER;
1933 SAVETMPS;
1934 PUTBACK;
1935 PUSHSTACK; 3823 PUSHSTACK;
3824
1936 PUSHMARK (SP); 3825 PUSHMARK (SP);
3826 PUTBACK;
1937 3827
1938 if (ix) 3828 if (ix)
1939 eval_sv (coderef, 0); 3829 eval_sv (coderef, 0);
1940 else 3830 else
1941 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3831 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1942 3832
1943 POPSTACK; 3833 POPSTACK;
1944 SPAGAIN; 3834 SPAGAIN;
1945 FREETMPS;
1946 LEAVE;
1947 PUTBACK;
1948 }
1949 3835
1950 if (!(coro->flags & CF_RUNNING)) 3836 if (current != coro)
1951 { 3837 {
3838 PUTBACK;
3839 slf_frame = slf_save;
1952 save_perl (aTHX_ coro); 3840 save_perl (aTHX_ coro);
1953 load_perl (aTHX_ &temp); 3841 load_perl (aTHX_ current);
1954 SPAGAIN; 3842 SPAGAIN;
1955 } 3843 }
1956 } 3844 }
1957} 3845}
1958 3846
… …
1961 PROTOTYPE: $ 3849 PROTOTYPE: $
1962 ALIAS: 3850 ALIAS:
1963 is_ready = CF_READY 3851 is_ready = CF_READY
1964 is_running = CF_RUNNING 3852 is_running = CF_RUNNING
1965 is_new = CF_NEW 3853 is_new = CF_NEW
1966 is_destroyed = CF_DESTROYED 3854 is_destroyed = CF_ZOMBIE
3855 is_zombie = CF_ZOMBIE
3856 is_suspended = CF_SUSPENDED
1967 CODE: 3857 CODE:
1968 RETVAL = boolSV (coro->flags & ix); 3858 RETVAL = boolSV (coro->flags & ix);
1969 OUTPUT: 3859 OUTPUT:
1970 RETVAL 3860 RETVAL
1971 3861
1972void 3862void
3863throw (SV *self, SV *exception = &PL_sv_undef)
3864 PROTOTYPE: $;$
3865 CODE:
3866{
3867 struct coro *coro = SvSTATE (self);
3868 struct coro *current = SvSTATE_current;
3869 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3870 SvREFCNT_dec (*exceptionp);
3871 SvGETMAGIC (exception);
3872 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3873
3874 api_ready (aTHX_ self);
3875}
3876
3877void
1973api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3878api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3879 PROTOTYPE: $;$
3880 C_ARGS: aTHX_ coro, flags
1974 3881
1975SV * 3882SV *
1976has_cctx (Coro::State coro) 3883has_cctx (Coro::State coro)
1977 PROTOTYPE: $ 3884 PROTOTYPE: $
1978 CODE: 3885 CODE:
1979 RETVAL = boolSV (!!coro->cctx); 3886 /* maybe manage the running flag differently */
3887 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1980 OUTPUT: 3888 OUTPUT:
1981 RETVAL 3889 RETVAL
1982 3890
1983int 3891int
1984is_traced (Coro::State coro) 3892is_traced (Coro::State coro)
… …
1986 CODE: 3894 CODE:
1987 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3895 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1988 OUTPUT: 3896 OUTPUT:
1989 RETVAL 3897 RETVAL
1990 3898
1991IV 3899UV
1992rss (Coro::State coro) 3900rss (Coro::State coro)
1993 PROTOTYPE: $ 3901 PROTOTYPE: $
1994 ALIAS: 3902 ALIAS:
1995 usecount = 1 3903 usecount = 1
1996 CODE: 3904 CODE:
… …
2002 OUTPUT: 3910 OUTPUT:
2003 RETVAL 3911 RETVAL
2004 3912
2005void 3913void
2006force_cctx () 3914force_cctx ()
3915 PROTOTYPE:
2007 CODE: 3916 CODE:
2008 struct coro *coro = SvSTATE (coro_current);
2009 coro->cctx->idle_sp = 0; 3917 cctx_current->idle_sp = 0;
2010 3918
2011void 3919void
2012swap_defsv (Coro::State self) 3920swap_defsv (Coro::State self)
2013 PROTOTYPE: $ 3921 PROTOTYPE: $
2014 ALIAS: 3922 ALIAS:
2015 swap_defav = 1 3923 swap_defav = 1
2016 CODE: 3924 CODE:
2017 if (!self->slot) 3925 if (!self->slot)
2018 croak ("cannot swap state with coroutine that has no saved state"); 3926 croak ("cannot swap state with coroutine that has no saved state,");
2019 else 3927 else
2020 { 3928 {
2021 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3929 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2022 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3930 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2023 3931
2024 SV *tmp = *src; *src = *dst; *dst = tmp; 3932 SV *tmp = *src; *src = *dst; *dst = tmp;
2025 } 3933 }
2026 3934
3935void
3936cancel (Coro::State self)
3937 CODE:
3938 coro_state_destroy (aTHX_ self);
3939
3940SV *
3941enable_times (int enabled = enable_times)
3942 CODE:
3943{
3944 RETVAL = boolSV (enable_times);
3945
3946 if (enabled != enable_times)
3947 {
3948 enable_times = enabled;
3949
3950 coro_times_update ();
3951 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3952 }
3953}
3954 OUTPUT:
3955 RETVAL
3956
3957void
3958times (Coro::State self)
3959 PPCODE:
3960{
3961 struct coro *current = SvSTATE (coro_current);
3962
3963 if (ecb_expect_false (current == self))
3964 {
3965 coro_times_update ();
3966 coro_times_add (SvSTATE (coro_current));
3967 }
3968
3969 EXTEND (SP, 2);
3970 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3971 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3972
3973 if (ecb_expect_false (current == self))
3974 coro_times_sub (SvSTATE (coro_current));
3975}
3976
3977void
3978swap_sv (Coro::State coro, SV *sva, SV *svb)
3979 CODE:
3980{
3981 struct coro *current = SvSTATE_current;
3982 AV *swap_sv;
3983 int i;
3984
3985 sva = SvRV (sva);
3986 svb = SvRV (svb);
3987
3988 if (current == coro)
3989 SWAP_SVS_LEAVE (current);
3990
3991 if (!coro->swap_sv)
3992 coro->swap_sv = newAV ();
3993
3994 swap_sv = coro->swap_sv;
3995
3996 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3997 {
3998 SV *a = AvARRAY (swap_sv)[i ];
3999 SV *b = AvARRAY (swap_sv)[i + 1];
4000
4001 if (a == sva && b == svb)
4002 {
4003 SvREFCNT_dec_NN (a);
4004 SvREFCNT_dec_NN (b);
4005
4006 for (; i <= AvFILLp (swap_sv) - 2; i++)
4007 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4008
4009 AvFILLp (swap_sv) -= 2;
4010
4011 goto removed;
4012 }
4013 }
4014
4015 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4016 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4017
4018 removed:
4019
4020 if (current == coro)
4021 SWAP_SVS_ENTER (current);
4022}
4023
4024
2027MODULE = Coro::State PACKAGE = Coro 4025MODULE = Coro::State PACKAGE = Coro
2028 4026
2029BOOT: 4027BOOT:
2030{ 4028{
2031 int i; 4029 if (SVt_LAST > 32)
4030 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
2032 4031
2033 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2034 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 4032 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2035 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 4033 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2036 4034 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
2037 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 4035 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2038 SvREADONLY_on (coro_current); 4036 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4037 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4038 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4039 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4040
4041 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4042 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4043 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4044 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
2039 4045
2040 coro_stash = gv_stashpv ("Coro", TRUE); 4046 coro_stash = gv_stashpv ("Coro", TRUE);
2041 4047
2042 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4048 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2043 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4049 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2044 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4050 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2045 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4051 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2046 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4052 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2047 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4053 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2048
2049 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2050 coro_ready[i] = newAV ();
2051 4054
2052 { 4055 {
2053 SV *sv = perl_get_sv ("Coro::API", TRUE); 4056 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2054 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2055 4057
2056 coroapi.schedule = api_schedule; 4058 coroapi.schedule = api_schedule;
4059 coroapi.schedule_to = api_schedule_to;
2057 coroapi.cede = api_cede; 4060 coroapi.cede = api_cede;
2058 coroapi.cede_notself = api_cede_notself; 4061 coroapi.cede_notself = api_cede_notself;
2059 coroapi.ready = api_ready; 4062 coroapi.ready = api_ready;
2060 coroapi.is_ready = api_is_ready; 4063 coroapi.is_ready = api_is_ready;
2061 coroapi.nready = &coro_nready; 4064 coroapi.nready = coro_nready;
2062 coroapi.current = coro_current; 4065 coroapi.current = coro_current;
2063 4066
4067 coroapi.enterleave_hook = api_enterleave_hook;
4068 coroapi.enterleave_unhook = api_enterleave_unhook;
4069 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4070
2064 GCoroAPI = &coroapi; 4071 /*GCoroAPI = &coroapi;*/
2065 sv_setiv (sv, (IV)&coroapi); 4072 sv_setiv (sv, (IV)&coroapi);
2066 SvREADONLY_on (sv); 4073 SvREADONLY_on (sv);
2067 } 4074 }
2068} 4075}
4076
4077SV *
4078async (...)
4079 PROTOTYPE: &@
4080 CODE:
4081 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4082 api_ready (aTHX_ RETVAL);
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087_destroy (Coro::State coro)
4088 CODE:
4089 /* used by the manager thread */
4090 coro_state_destroy (aTHX_ coro);
4091
4092void
4093on_destroy (Coro::State coro, SV *cb)
4094 CODE:
4095 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4096
4097void
4098join (...)
4099 CODE:
4100 CORO_EXECUTE_SLF_XS (slf_init_join);
4101
4102void
4103terminate (...)
4104 CODE:
4105 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4106
4107void
4108cancel (...)
4109 CODE:
4110 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4111
4112int
4113safe_cancel (Coro::State self, ...)
4114 C_ARGS: aTHX_ self, &ST (1), items - 1
4115
4116void
4117schedule (...)
4118 CODE:
4119 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4120
4121void
4122schedule_to (...)
4123 CODE:
4124 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4125
4126void
4127cede_to (...)
4128 CODE:
4129 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4130
4131void
4132cede (...)
4133 CODE:
4134 CORO_EXECUTE_SLF_XS (slf_init_cede);
4135
4136void
4137cede_notself (...)
4138 CODE:
4139 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2069 4140
2070void 4141void
2071_set_current (SV *current) 4142_set_current (SV *current)
2072 PROTOTYPE: $ 4143 PROTOTYPE: $
2073 CODE: 4144 CODE:
2074 SvREFCNT_dec (SvRV (coro_current)); 4145 SvREFCNT_dec_NN (SvRV (coro_current));
2075 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current))); 4146 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2076 4147
2077void 4148void
2078_set_readyhook (SV *hook) 4149_set_readyhook (SV *hook)
2079 PROTOTYPE: $ 4150 PROTOTYPE: $
2080 CODE: 4151 CODE:
2081 LOCK;
2082 SvREFCNT_dec (coro_readyhook); 4152 SvREFCNT_dec (coro_readyhook);
4153 SvGETMAGIC (hook);
4154 if (SvOK (hook))
4155 {
2083 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 4156 coro_readyhook = newSVsv (hook);
2084 UNLOCK; 4157 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4158 }
4159 else
4160 {
4161 coro_readyhook = 0;
4162 CORO_READYHOOK = 0;
4163 }
2085 4164
2086int 4165int
2087prio (Coro::State coro, int newprio = 0) 4166prio (Coro::State coro, int newprio = 0)
4167 PROTOTYPE: $;$
2088 ALIAS: 4168 ALIAS:
2089 nice = 1 4169 nice = 1
2090 CODE: 4170 CODE:
2091{ 4171{
2092 RETVAL = coro->prio; 4172 RETVAL = coro->prio;
… …
2094 if (items > 1) 4174 if (items > 1)
2095 { 4175 {
2096 if (ix) 4176 if (ix)
2097 newprio = coro->prio - newprio; 4177 newprio = coro->prio - newprio;
2098 4178
2099 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4179 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2100 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4180 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2101 4181
2102 coro->prio = newprio; 4182 coro->prio = newprio;
2103 } 4183 }
2104} 4184}
2105 OUTPUT: 4185 OUTPUT:
… …
2107 4187
2108SV * 4188SV *
2109ready (SV *self) 4189ready (SV *self)
2110 PROTOTYPE: $ 4190 PROTOTYPE: $
2111 CODE: 4191 CODE:
2112 RETVAL = boolSV (api_ready (self)); 4192 RETVAL = boolSV (api_ready (aTHX_ self));
2113 OUTPUT: 4193 OUTPUT:
2114 RETVAL 4194 RETVAL
2115 4195
2116int 4196int
2117nready (...) 4197nready (...)
… …
2120 RETVAL = coro_nready; 4200 RETVAL = coro_nready;
2121 OUTPUT: 4201 OUTPUT:
2122 RETVAL 4202 RETVAL
2123 4203
2124void 4204void
2125throw (Coro::State self, SV *throw = &PL_sv_undef) 4205suspend (Coro::State self)
2126 PROTOTYPE: $;$ 4206 PROTOTYPE: $
2127 CODE: 4207 CODE:
2128 SvREFCNT_dec (self->throw); 4208 self->flags |= CF_SUSPENDED;
2129 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2130 4209
2131# for async_pool speedup
2132void 4210void
2133_pool_1 (SV *cb) 4211resume (Coro::State self)
4212 PROTOTYPE: $
2134 CODE: 4213 CODE:
2135{ 4214 self->flags &= ~CF_SUSPENDED;
2136 struct coro *coro = SvSTATE (coro_current);
2137 HV *hv = (HV *)SvRV (coro_current);
2138 AV *defav = GvAV (PL_defgv);
2139 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2140 AV *invoke_av;
2141 int i, len;
2142 4215
2143 if (!invoke) 4216void
4217_pool_handler (...)
4218 CODE:
4219 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4220
4221void
4222async_pool (SV *cv, ...)
4223 PROTOTYPE: &@
4224 PPCODE:
4225{
4226 HV *hv = (HV *)av_pop (av_async_pool);
4227 AV *av = newAV ();
4228 SV *cb = ST (0);
4229 int i;
4230
4231 av_extend (av, items - 2);
4232 for (i = 1; i < items; ++i)
4233 av_push (av, SvREFCNT_inc_NN (ST (i)));
4234
4235 if ((SV *)hv == &PL_sv_undef)
2144 { 4236 {
2145 SV *old = PL_diehook; 4237 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2146 PL_diehook = 0; 4238 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2147 SvREFCNT_dec (old); 4239 SvREFCNT_dec_NN (sv);
2148 croak ("\3async_pool terminate\2\n");
2149 } 4240 }
2150 4241
2151 SvREFCNT_dec (coro->saved_deffh);
2152 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2153
2154 hv_store (hv, "desc", sizeof ("desc") - 1,
2155 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2156
2157 invoke_av = (AV *)SvRV (invoke);
2158 len = av_len (invoke_av);
2159
2160 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2161
2162 if (len > 0)
2163 { 4242 {
2164 av_fill (defav, len - 1); 4243 struct coro *coro = SvSTATE_hv (hv);
2165 for (i = 0; i < len; ++i) 4244
2166 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 4245 assert (!coro->invoke_cb);
4246 assert (!coro->invoke_av);
4247 coro->invoke_cb = SvREFCNT_inc (cb);
4248 coro->invoke_av = av;
2167 } 4249 }
2168 4250
4251 api_ready (aTHX_ (SV *)hv);
4252
4253 if (GIMME_V != G_VOID)
4254 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4255 else
2169 SvREFCNT_dec (invoke); 4256 SvREFCNT_dec_NN (hv);
2170} 4257}
2171 4258
2172void 4259SV *
2173_pool_2 (SV *cb) 4260rouse_cb ()
4261 PROTOTYPE:
2174 CODE: 4262 CODE:
2175{ 4263 RETVAL = coro_new_rouse_cb (aTHX);
2176 struct coro *coro = SvSTATE (coro_current);
2177
2178 sv_setsv (cb, &PL_sv_undef);
2179
2180 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2181 coro->saved_deffh = 0;
2182
2183 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2184 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2185 {
2186 SV *old = PL_diehook;
2187 PL_diehook = 0;
2188 SvREFCNT_dec (old);
2189 croak ("\3async_pool terminate\2\n");
2190 }
2191
2192 av_clear (GvAV (PL_defgv));
2193 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2194 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2195
2196 coro->prio = 0;
2197
2198 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2199 api_trace (coro_current, 0);
2200
2201 av_push (av_async_pool, newSVsv (coro_current));
2202}
2203
2204#if 0
2205
2206void
2207_generator_call (...)
2208 PROTOTYPE: @
2209 PPCODE:
2210 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2211 xxxx
2212 abort ();
2213
2214SV *
2215gensub (SV *sub, ...)
2216 PROTOTYPE: &;@
2217 CODE:
2218{
2219 struct coro *coro;
2220 MAGIC *mg;
2221 CV *xcv;
2222 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2223 int i;
2224
2225 CvGV (ncv) = CvGV (cv);
2226 CvFILE (ncv) = CvFILE (cv);
2227
2228 Newz (0, coro, 1, struct coro);
2229 coro->args = newAV ();
2230 coro->flags = CF_NEW;
2231
2232 av_extend (coro->args, items - 1);
2233 for (i = 1; i < items; i++)
2234 av_push (coro->args, newSVsv (ST (i)));
2235
2236 CvISXSUB_on (ncv);
2237 CvXSUBANY (ncv).any_ptr = (void *)coro;
2238
2239 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2240
2241 CvXSUB (ncv) = CvXSUB (xcv);
2242 CvANON_on (ncv);
2243
2244 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2245 RETVAL = newRV_noinc ((SV *)ncv);
2246}
2247 OUTPUT: 4264 OUTPUT:
2248 RETVAL 4265 RETVAL
2249 4266
2250#endif
2251
2252
2253MODULE = Coro::State PACKAGE = Coro::AIO
2254
2255void 4267void
2256_get_state (SV *self) 4268rouse_wait (...)
4269 PROTOTYPE: ;$
2257 PPCODE: 4270 PPCODE:
2258{ 4271 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2259 AV *defav = GvAV (PL_defgv);
2260 AV *av = newAV ();
2261 int i;
2262 SV *data_sv = newSV (sizeof (struct io_state));
2263 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2264 SvCUR_set (data_sv, sizeof (struct io_state));
2265 SvPOK_only (data_sv);
2266
2267 data->errorno = errno;
2268 data->laststype = PL_laststype;
2269 data->laststatval = PL_laststatval;
2270 data->statcache = PL_statcache;
2271
2272 av_extend (av, AvFILLp (defav) + 1 + 1);
2273
2274 for (i = 0; i <= AvFILLp (defav); ++i)
2275 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2276
2277 av_push (av, data_sv);
2278
2279 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2280
2281 api_ready (self);
2282}
2283 4272
2284void 4273void
2285_set_state (SV *state) 4274on_enter (SV *block)
4275 ALIAS:
4276 on_leave = 1
2286 PROTOTYPE: $ 4277 PROTOTYPE: &
4278 CODE:
4279{
4280 struct coro *coro = SvSTATE_current;
4281 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4282
4283 block = s_get_cv_croak (block);
4284
4285 if (!*avp)
4286 *avp = newAV ();
4287
4288 av_push (*avp, SvREFCNT_inc (block));
4289
4290 if (!ix)
4291 on_enterleave_call (aTHX_ block);
4292
4293 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4294 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4295 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4296}
4297
4298
4299MODULE = Coro::State PACKAGE = PerlIO::cede
4300
4301BOOT:
4302 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4303
4304
4305MODULE = Coro::State PACKAGE = Coro::Semaphore
4306
4307SV *
4308new (SV *klass, SV *count = 0)
4309 CODE:
4310{
4311 int semcnt = 1;
4312
4313 if (count)
4314 {
4315 SvGETMAGIC (count);
4316
4317 if (SvOK (count))
4318 semcnt = SvIV (count);
4319 }
4320
4321 RETVAL = sv_bless (
4322 coro_waitarray_new (aTHX_ semcnt),
4323 GvSTASH (CvGV (cv))
4324 );
4325}
4326 OUTPUT:
4327 RETVAL
4328
4329# helper for Coro::Channel and others
4330SV *
4331_alloc (int count)
4332 CODE:
4333 RETVAL = coro_waitarray_new (aTHX_ count);
4334 OUTPUT:
4335 RETVAL
4336
4337SV *
4338count (SV *self)
4339 CODE:
4340 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4341 OUTPUT:
4342 RETVAL
4343
4344void
4345up (SV *self)
4346 CODE:
4347 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4348
4349void
4350adjust (SV *self, int adjust)
4351 CODE:
4352 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4353
4354void
4355down (...)
4356 CODE:
4357 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4358
4359void
4360wait (...)
4361 CODE:
4362 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4363
4364void
4365try (SV *self)
4366 PPCODE:
4367{
4368 AV *av = (AV *)SvRV (self);
4369 SV *count_sv = AvARRAY (av)[0];
4370 IV count = SvIVX (count_sv);
4371
4372 if (count > 0)
4373 {
4374 --count;
4375 SvIVX (count_sv) = count;
4376 XSRETURN_YES;
4377 }
4378 else
4379 XSRETURN_NO;
4380}
4381
4382void
4383waiters (SV *self)
2287 PPCODE: 4384 PPCODE:
2288{ 4385{
4386 AV *av = (AV *)SvRV (self);
4387 int wcount = AvFILLp (av) + 1 - 1;
4388
4389 if (GIMME_V == G_SCALAR)
4390 XPUSHs (sv_2mortal (newSViv (wcount)));
4391 else
4392 {
4393 int i;
4394 EXTEND (SP, wcount);
4395 for (i = 1; i <= wcount; ++i)
4396 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4397 }
4398}
4399
4400MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4401
4402void
4403_may_delete (SV *sem, int count, unsigned int extra_refs)
4404 PPCODE:
4405{
2289 AV *av = (AV *)SvRV (state); 4406 AV *av = (AV *)SvRV (sem);
2290 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2291 int i;
2292 4407
2293 errno = data->errorno; 4408 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2294 PL_laststype = data->laststype; 4409 && AvFILLp (av) == 0 /* no waiters, just count */
2295 PL_laststatval = data->laststatval; 4410 && SvIV (AvARRAY (av)[0]) == count)
2296 PL_statcache = data->statcache; 4411 XSRETURN_YES;
2297 4412
4413 XSRETURN_NO;
4414}
4415
4416MODULE = Coro::State PACKAGE = Coro::Signal
4417
4418SV *
4419new (SV *klass)
4420 CODE:
4421 RETVAL = sv_bless (
4422 coro_waitarray_new (aTHX_ 0),
4423 GvSTASH (CvGV (cv))
4424 );
4425 OUTPUT:
4426 RETVAL
4427
4428void
4429wait (...)
4430 CODE:
4431 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4432
4433void
4434broadcast (SV *self)
4435 CODE:
4436{
4437 AV *av = (AV *)SvRV (self);
4438 coro_signal_wake (aTHX_ av, AvFILLp (av));
4439}
4440
4441void
4442send (SV *self)
4443 CODE:
4444{
4445 AV *av = (AV *)SvRV (self);
4446
2298 EXTEND (SP, AvFILLp (av)); 4447 if (AvFILLp (av))
2299 for (i = 0; i < AvFILLp (av); ++i) 4448 coro_signal_wake (aTHX_ av, 1);
2300 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 4449 else
4450 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2301} 4451}
4452
4453IV
4454awaited (SV *self)
4455 CODE:
4456 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4457 OUTPUT:
4458 RETVAL
2302 4459
2303 4460
2304MODULE = Coro::State PACKAGE = Coro::AnyEvent 4461MODULE = Coro::State PACKAGE = Coro::AnyEvent
2305 4462
2306BOOT: 4463BOOT:
2307 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 4464 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2308 4465
2309SV * 4466void
2310_schedule (...) 4467_schedule (...)
2311 PROTOTYPE: @
2312 CODE: 4468 CODE:
2313{ 4469{
2314 static int incede; 4470 static int incede;
2315 4471
2316 api_cede_notself (); 4472 api_cede_notself (aTHX);
2317 4473
2318 ++incede; 4474 ++incede;
2319 while (coro_nready >= incede && api_cede ()) 4475 while (coro_nready >= incede && api_cede (aTHX))
2320 ; 4476 ;
2321 4477
2322 sv_setsv (sv_activity, &PL_sv_undef); 4478 sv_setsv (sv_activity, &PL_sv_undef);
2323 if (coro_nready >= incede) 4479 if (coro_nready >= incede)
2324 { 4480 {
2325 PUSHMARK (SP); 4481 PUSHMARK (SP);
2326 PUTBACK; 4482 PUTBACK;
2327 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 4483 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2328 SPAGAIN;
2329 } 4484 }
2330 4485
2331 --incede; 4486 --incede;
2332} 4487}
2333 4488
2334 4489
2335MODULE = Coro::State PACKAGE = PerlIO::cede 4490MODULE = Coro::State PACKAGE = Coro::AIO
2336 4491
2337BOOT: 4492void
2338 PerlIO_define_layer (aTHX_ &PerlIO_cede); 4493_register (char *target, char *proto, SV *req)
4494 CODE:
4495{
4496 SV *req_cv = s_get_cv_croak (req);
4497 /* newXSproto doesn't return the CV on 5.8 */
4498 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4499 sv_setpv ((SV *)slf_cv, proto);
4500 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4501}
4502
4503MODULE = Coro::State PACKAGE = Coro::Select
4504
4505void
4506patch_pp_sselect ()
4507 CODE:
4508 if (!coro_old_pp_sselect)
4509 {
4510 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4511 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4512 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4513 }
4514
4515void
4516unpatch_pp_sselect ()
4517 CODE:
4518 if (coro_old_pp_sselect)
4519 {
4520 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4521 coro_old_pp_sselect = 0;
4522 }
4523
4524MODULE = Coro::State PACKAGE = Coro::Util
4525
4526void
4527_exit (int code)
4528 CODE:
4529 _exit (code);
4530
4531NV
4532time ()
4533 CODE:
4534 RETVAL = nvtime (aTHX);
4535 OUTPUT:
4536 RETVAL
4537
4538NV
4539gettimeofday ()
4540 PPCODE:
4541{
4542 UV tv [2];
4543 u2time (aTHX_ tv);
4544 EXTEND (SP, 2);
4545 PUSHs (sv_2mortal (newSVuv (tv [0])));
4546 PUSHs (sv_2mortal (newSVuv (tv [1])));
4547}
4548

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