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Comparing Coro/Coro/State.xs (file contents):
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC vs.
Revision 1.464 by root, Wed Jun 22 22:53:49 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/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */
100#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
103
104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
105# undef CORO_STACKGUARD
106#endif
107
108#ifndef CORO_STACKGUARD
109# define CORO_STACKGUARD 0
110#endif 83#endif
111 84
112/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
113#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
114# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif 88#endif
116 89
117/* 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
118 * portable way as possible. */ 91 * portable way as possible. */
119#define dSTACKLEVEL volatile char stacklevel
120#define STACKLEVEL ((void *)&stacklevel)
121
122#define IN_DESTRUCT (PL_main_cv == Nullcv)
123
124#if __GNUC__ >= 3 92#if __GNUC__ >= 4
125# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
126# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
127# define expect(expr,value) __builtin_expect ((expr),(value))
128#else 95#else
129# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
130# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
131# define expect(expr,value) (expr)
132#endif 98#endif
133 99
134#define expect_false(expr) expect ((expr) != 0, 0) 100#define IN_DESTRUCT PL_dirty
135#define expect_true(expr) expect ((expr) != 0, 1)
136
137#define NOINLINE attribute ((noinline))
138 101
139#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
140 104
141#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
142static perl_mutex coro_mutex; 106# if CORO_PTHREAD
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif 108# endif
109#endif
149 110
150/* helper storage struct for Coro::AIO */ 111#ifdef __linux
151struct io_state 112# include <time.h> /* for timespec */
152{ 113# include <syscall.h> /* for SYS_* */
153 AV *res; 114# ifdef SYS_clock_gettime
154 int errorno; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
155 I32 laststype; 116# define CORO_CLOCK_MONOTONIC 1
156 int laststatval; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
157 Stat_t statcache; 118# endif
158}; 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
159 126
160static 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]);
161 129
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;
162static size_t coro_stacksize = CORO_STACKSIZE; 136static size_t cctx_stacksize = CORO_STACKSIZE;
163static struct CoroAPI coroapi; 137static struct CoroAPI coroapi;
164static AV *main_mainstack; /* used to differentiate between $main and others */ 138static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env; 139static JMPENV *main_top_env;
166static HV *coro_state_stash, *coro_stash; 140static HV *coro_state_stash, *coro_stash;
167static volatile SV *coro_mortal; /* will be freed after next transfer */ 141static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
142
143static AV *av_destroy; /* destruction queue */
144static SV *sv_manager; /* the manager coro */
145static SV *sv_idle; /* $Coro::idle */
168 146
169static GV *irsgv; /* $/ */ 147static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */ 148static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook; 149static SV *rv_diehook;
172static SV *rv_warnhook; 150static SV *rv_warnhook;
173static HV *hv_sig; /* %SIG */
174 151
175/* async_pool helper stuff */ 152/* async_pool helper stuff */
176static SV *sv_pool_rss; 153static SV *sv_pool_rss;
177static SV *sv_pool_size; 154static SV *sv_pool_size;
155static SV *sv_async_pool_idle; /* description string */
178static AV *av_async_pool; 156static AV *av_async_pool; /* idle pool */
157static SV *sv_Coro; /* class string */
158static CV *cv_pool_handler;
179 159
180/* Coro::AnyEvent */ 160/* Coro::AnyEvent */
181static SV *sv_activity; 161static SV *sv_activity;
182 162
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
183static struct coro_cctx *cctx_first; 169static struct coro_cctx *cctx_first;
184static int cctx_count, cctx_idle; 170static int cctx_count, cctx_idle;
185 171
186enum { 172enum
173{
187 CC_MAPPED = 0x01, 174 CC_MAPPED = 0x01,
188 CC_NOREUSE = 0x02, /* throw this away after tracing */ 175 CC_NOREUSE = 0x02, /* throw this away after tracing */
189 CC_TRACE = 0x04, 176 CC_TRACE = 0x04,
190 CC_TRACE_SUB = 0x08, /* trace sub calls */ 177 CC_TRACE_SUB = 0x08, /* trace sub calls */
191 CC_TRACE_LINE = 0x10, /* trace each statement */ 178 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 179 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193}; 180};
194 181
195/* this is a structure representing a c-level coroutine */ 182/* this is a structure representing a c-level coroutine */
196typedef struct coro_cctx { 183typedef struct coro_cctx
184{
197 struct coro_cctx *next; 185 struct coro_cctx *next;
198 186
199 /* the stack */ 187 /* the stack */
200 void *sptr; 188 struct coro_stack stack;
201 size_t ssize;
202 189
203 /* cpu state */ 190 /* cpu state */
204 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
205 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
206 JMPENV *top_env; 195 JMPENV *top_env;
207 coro_context cctx; 196 coro_context cctx;
208 197
198 U32 gen;
209#if CORO_USE_VALGRIND 199#if CORO_USE_VALGRIND
210 int valgrind_id; 200 int valgrind_id;
211#endif 201#endif
212 unsigned char flags; 202 unsigned char flags;
213} coro_cctx; 203} coro_cctx;
214 204
205static coro_cctx *cctx_current; /* the currently running cctx */
206
207/*****************************************************************************/
208
209static MGVTBL coro_state_vtbl;
210
215enum { 211enum
212{
216 CF_RUNNING = 0x0001, /* coroutine is running */ 213 CF_RUNNING = 0x0001, /* coroutine is running */
217 CF_READY = 0x0002, /* coroutine is ready */ 214 CF_READY = 0x0002, /* coroutine is ready */
218 CF_NEW = 0x0004, /* has never been switched to */ 215 CF_NEW = 0x0004, /* has never been switched to */
219 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) */
220}; 219};
221 220
222/* 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 */
223typedef struct { 222typedef struct
224 SV *defsv; 223{
225 AV *defav;
226 SV *errsv;
227 SV *irsgv;
228#define VAR(name,type) type name; 224 #define VARx(name,expr,type) type name;
229# include "state.h" 225 #include "state.h"
230#undef VAR
231} perl_slots; 226} perl_slots;
232 227
228/* how many context stack entries do we need for perl_slots */
233#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))
234 230
235/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
236struct coro { 232struct coro
233{
237 /* the c coroutine allocated to this perl coroutine, if any */ 234 /* the C coroutine allocated to this perl coroutine, if any */
238 coro_cctx *cctx; 235 coro_cctx *cctx;
239 236
240 /* process data */ 237 /* ready queue */
238 struct coro *next_ready;
239
240 /* state data */
241 struct CoroSLF slf_frame; /* saved slf frame */
241 AV *mainstack; 242 AV *mainstack;
242 perl_slots *slot; /* basically the saved sp */ 243 perl_slots *slot; /* basically the saved sp */
243 244
245 CV *startcv; /* the CV to execute */
244 AV *args; /* data associated with this coroutine (initial args) */ 246 AV *args; /* data associated with this coroutine (initial args) */
245 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */ 247 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */ 248 HV *hv; /* the perl hash associated with this coro, if any */
248 249
249 /* statistics */ 250 /* statistics */
250 int usecount; /* number of transfers to this coro */ 251 int usecount; /* number of transfers to this coro */
251 252
252 /* coro process data */ 253 /* coro process data */
253 int prio; 254 int prio;
254 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 */
255 259
256 /* async_pool */ 260 /* async_pool */
257 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;
258 274
259 /* linked list */ 275 /* linked list */
260 struct coro *next, *prev; 276 struct coro *next, *prev;
261}; 277};
262 278
263typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
264typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
265 281
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
266/** Coro ********************************************************************/ 287/** Coro ********************************************************************/
267 288
268#define PRIO_MAX 3 289#define CORO_PRIO_MAX 3
269#define PRIO_HIGH 1 290#define CORO_PRIO_HIGH 1
270#define PRIO_NORMAL 0 291#define CORO_PRIO_NORMAL 0
271#define PRIO_LOW -1 292#define CORO_PRIO_LOW -1
272#define PRIO_IDLE -3 293#define CORO_PRIO_IDLE -3
273#define PRIO_MIN -4 294#define CORO_PRIO_MIN -4
274 295
275/* for Coro.pm */ 296/* for Coro.pm */
276static SV *coro_current; 297static SV *coro_current;
277static SV *coro_readyhook; 298static SV *coro_readyhook;
278static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 299static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
279static int coro_nready; 300static CV *cv_coro_run;
280static 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
281 398
282/** lowlevel stuff **********************************************************/ 399/** lowlevel stuff **********************************************************/
283 400
284static SV * 401static SV * ecb_noinline
285coro_get_sv (pTHX_ const char *name, int create) 402coro_get_sv (pTHX_ const char *name, int create)
286{ 403{
287#if PERL_VERSION_ATLEAST (5,10,0) 404#if PERL_VERSION_ATLEAST (5,10,0)
288 /* 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 */
289 get_sv (name, create); 406 get_sv (name, create);
290#endif 407#endif
291 return get_sv (name, create); 408 return get_sv (name, create);
292} 409}
293 410
294static AV * 411static AV * ecb_noinline
295coro_get_av (pTHX_ const char *name, int create) 412coro_get_av (pTHX_ const char *name, int create)
296{ 413{
297#if PERL_VERSION_ATLEAST (5,10,0) 414#if PERL_VERSION_ATLEAST (5,10,0)
298 /* 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 */
299 get_av (name, create); 416 get_av (name, create);
300#endif 417#endif
301 return get_av (name, create); 418 return get_av (name, create);
302} 419}
303 420
304static HV * 421static HV * ecb_noinline
305coro_get_hv (pTHX_ const char *name, int create) 422coro_get_hv (pTHX_ const char *name, int create)
306{ 423{
307#if PERL_VERSION_ATLEAST (5,10,0) 424#if PERL_VERSION_ATLEAST (5,10,0)
308 /* 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 */
309 get_hv (name, create); 426 get_hv (name, create);
310#endif 427#endif
311 return get_hv (name, create); 428 return get_hv (name, create);
312} 429}
313 430
314static 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 *
315coro_clone_padlist (pTHX_ CV *cv) 537coro_derive_padlist (pTHX_ CV *cv)
316{ 538{
317 AV *padlist = CvPADLIST (cv); 539 PADLIST *padlist = CvPADLIST (cv);
318 AV *newpadlist, *newpad; 540 PADLIST *newpadlist;
541 PADNAMELIST *padnames;
542 PAD *newpad;
543 PADOFFSET off = PadlistMAX (padlist) + 1;
319 544
320 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. */
321 AvREAL_off (newpadlist); 573 AvREAL_off (newpadlist);
322#if PERL_VERSION_ATLEAST (5,10,0)
323 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
324#else
325 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
326#endif 574#endif
327 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
328 --AvFILLp (padlist);
329 575
330 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 576 /* Already extended to 2 elements by newPADLIST. */
331 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;
332 584
333 return newpadlist; 585 return newpadlist;
334} 586}
335 587
336static void 588ecb_inline void
337free_padlist (pTHX_ AV *padlist) 589free_padlist (pTHX_ PADLIST *padlist)
338{ 590{
339 /* may be during global destruction */ 591 /* may be during global destruction */
340 if (SvREFCNT (padlist)) 592 if (!IN_DESTRUCT)
341 { 593 {
342 I32 i = AvFILLp (padlist); 594 I32 i = PadlistMAX (padlist);
343 while (i >= 0) 595
596 while (i > 0) /* special-case index 0 */
344 { 597 {
345 SV **svp = av_fetch (padlist, i--, FALSE); 598 /* we try to be extra-careful here */
599 PAD *pad = PadlistARRAY (padlist)[i--];
600
346 if (svp) 601 if (pad)
347 { 602 {
348 SV *sv; 603 I32 j = PadMAX (pad);
349 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 604
605 while (j >= 0)
350 SvREFCNT_dec (sv); 606 SvREFCNT_dec (PadARRAY (pad)[j--]);
351 607
608 PadMAX (pad) = -1;
352 SvREFCNT_dec (*svp); 609 SvREFCNT_dec (pad);
353 } 610 }
354 } 611 }
355 612
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);
356 SvREFCNT_dec ((SV*)padlist); 621 SvREFCNT_dec ((SV*)padlist);
622#endif
357 } 623 }
358} 624}
359 625
360static int 626static int
361coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 627coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
362{ 628{
363 AV *padlist; 629 PADLIST *padlist;
364 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;
365 632
366 /* casting is fun. */ 633 /* perl manages to free our internal AV and _then_ call us */
367 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 634 if (IN_DESTRUCT)
635 return 0;
636
637 while (len--)
368 free_padlist (aTHX_ padlist); 638 free_padlist (aTHX_ padlists[len]);
369
370 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
371 639
372 return 0; 640 return 0;
373} 641}
374
375#define CORO_MAGIC_type_cv PERL_MAGIC_ext
376#define CORO_MAGIC_type_state PERL_MAGIC_ext
377 642
378static MGVTBL coro_cv_vtbl = { 643static MGVTBL coro_cv_vtbl = {
379 0, 0, 0, 0, 644 0, 0, 0, 0,
380 coro_cv_free 645 coro_cv_free
381}; 646};
382 647
383#define CORO_MAGIC(sv,type) \
384 SvMAGIC (sv) \
385 ? SvMAGIC (sv)->mg_type == type \
386 ? SvMAGIC (sv) \
387 : mg_find (sv, type) \
388 : 0
389
390#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
391#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
392
393static struct coro *
394SvSTATE_ (pTHX_ SV *coro)
395{
396 HV *stash;
397 MAGIC *mg;
398
399 if (SvROK (coro))
400 coro = SvRV (coro);
401
402 if (expect_false (SvTYPE (coro) != SVt_PVHV))
403 croak ("Coro::State object required");
404
405 stash = SvSTASH (coro);
406 if (expect_false (stash != coro_stash && stash != coro_state_stash))
407 {
408 /* very slow, but rare, check */
409 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
410 croak ("Coro::State object required");
411 }
412
413 mg = CORO_MAGIC_state (coro);
414 return (struct coro *)mg->mg_ptr;
415}
416
417#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
418
419/* the next two functions merely cache the padlists */ 648/* the next two functions merely cache the padlists */
420static void 649ecb_inline void
421get_padlist (pTHX_ CV *cv) 650get_padlist (pTHX_ CV *cv)
422{ 651{
423 MAGIC *mg = CORO_MAGIC_cv (cv); 652 MAGIC *mg = CORO_MAGIC_cv (cv);
424 AV *av; 653 size_t *lenp;
425 654
426 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 655 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
427 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 656 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
428 else 657 else
429 { 658 {
430#if CORO_PREFER_PERL_FUNCTIONS 659#if CORO_PREFER_PERL_FUNCTIONS
431 /* this is probably cleaner? but also slower! */ 660 /* this is probably cleaner? but also slower! */
432 /* in practise, it seems to be less stable */ 661 /* in practise, it seems to be less stable */
433 CV *cp = Perl_cv_clone (cv); 662 CV *cp = Perl_cv_clone (aTHX_ cv);
434 CvPADLIST (cv) = CvPADLIST (cp); 663 CvPADLIST (cv) = CvPADLIST (cp);
435 CvPADLIST (cp) = 0; 664 CvPADLIST (cp) = 0;
436 SvREFCNT_dec (cp); 665 SvREFCNT_dec (cp);
437#else 666#else
438 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 667 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
439#endif 668#endif
440 } 669 }
441} 670}
442 671
443static void 672ecb_inline void
444put_padlist (pTHX_ CV *cv) 673put_padlist (pTHX_ CV *cv)
445{ 674{
446 MAGIC *mg = CORO_MAGIC_cv (cv); 675 MAGIC *mg = CORO_MAGIC_cv (cv);
447 AV *av;
448 676
449 if (expect_false (!mg)) 677 if (ecb_expect_false (!mg))
678 {
450 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);
451 687
452 av = (AV *)mg->mg_obj; 688 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
453
454 if (expect_false (AvFILLp (av) >= AvMAX (av)))
455 av_extend (av, AvMAX (av) + 1);
456
457 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
458} 689}
459 690
460/** 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);
461 764
462static void 765static void
463load_perl (pTHX_ Coro__State c) 766load_perl (pTHX_ Coro__State c)
464{ 767{
465 perl_slots *slot = c->slot; 768 perl_slots *slot = c->slot;
466 c->slot = 0; 769 c->slot = 0;
467 770
468 PL_mainstack = c->mainstack; 771 PL_mainstack = c->mainstack;
469 772
470 GvSV (PL_defgv) = slot->defsv; 773#if CORO_JIT
471 GvAV (PL_defgv) = slot->defav; 774 load_perl_slots (slot);
472 GvSV (PL_errgv) = slot->errsv; 775#else
473 GvSV (irsgv) = slot->irsgv;
474
475 #define VAR(name,type) PL_ ## name = slot->name; 776 #define VARx(name,expr,type) expr = slot->name;
476 # include "state.h" 777 #include "state.h"
477 #undef VAR 778#endif
478 779
479 { 780 {
480 dSP; 781 dSP;
481 782
482 CV *cv; 783 CV *cv;
483 784
484 /* now do the ugly restore mess */ 785 /* now do the ugly restore mess */
485 while (expect_true (cv = (CV *)POPs)) 786 while (ecb_expect_true (cv = (CV *)POPs))
486 { 787 {
487 put_padlist (aTHX_ cv); /* mark this padlist as available */ 788 put_padlist (aTHX_ cv); /* mark this padlist as available */
488 CvDEPTH (cv) = PTR2IV (POPs); 789 CvDEPTH (cv) = PTR2IV (POPs);
489 CvPADLIST (cv) = (AV *)POPs; 790 CvPADLIST (cv) = (PADLIST *)POPs;
490 } 791 }
491 792
492 PUTBACK; 793 PUTBACK;
493 } 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);
494} 824}
495 825
496static void 826static void
497save_perl (pTHX_ Coro__State c) 827save_perl (pTHX_ Coro__State c)
498{ 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
499 { 858 {
500 dSP; 859 dSP;
501 I32 cxix = cxstack_ix; 860 I32 cxix = cxstack_ix;
502 PERL_CONTEXT *ccstk = cxstack; 861 PERL_CONTEXT *ccstk = cxstack;
503 PERL_SI *top_si = PL_curstackinfo; 862 PERL_SI *top_si = PL_curstackinfo;
… …
509 868
510 XPUSHs (Nullsv); 869 XPUSHs (Nullsv);
511 /* this loop was inspired by pp_caller */ 870 /* this loop was inspired by pp_caller */
512 for (;;) 871 for (;;)
513 { 872 {
514 while (expect_true (cxix >= 0)) 873 while (ecb_expect_true (cxix >= 0))
515 { 874 {
516 PERL_CONTEXT *cx = &ccstk[cxix--]; 875 PERL_CONTEXT *cx = &ccstk[cxix--];
517 876
518 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))
519 { 878 {
520 CV *cv = cx->blk_sub.cv; 879 CV *cv = cx->blk_sub.cv;
521 880
522 if (expect_true (CvDEPTH (cv))) 881 if (ecb_expect_true (CvDEPTH (cv)))
523 { 882 {
524 EXTEND (SP, 3); 883 EXTEND (SP, 3);
525 PUSHs ((SV *)CvPADLIST (cv)); 884 PUSHs ((SV *)CvPADLIST (cv));
526 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv))); 885 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
527 PUSHs ((SV *)cv); 886 PUSHs ((SV *)cv);
… …
530 get_padlist (aTHX_ cv); 889 get_padlist (aTHX_ cv);
531 } 890 }
532 } 891 }
533 } 892 }
534 893
535 if (expect_true (top_si->si_type == PERLSI_MAIN)) 894 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
536 break; 895 break;
537 896
538 top_si = top_si->si_prev; 897 top_si = top_si->si_prev;
539 ccstk = top_si->si_cxstack; 898 ccstk = top_si->si_cxstack;
540 cxix = top_si->si_cxix; 899 cxix = top_si->si_cxix;
… …
542 901
543 PUTBACK; 902 PUTBACK;
544 } 903 }
545 904
546 /* allocate some space on the context stack for our purposes */ 905 /* allocate some space on the context stack for our purposes */
547 /* we manually unroll here, as usually 2 slots is enough */ 906 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
548 if (SLOT_COUNT >= 1) CXINC;
549 if (SLOT_COUNT >= 2) CXINC;
550 if (SLOT_COUNT >= 3) CXINC;
551 { 907 {
552 int i; 908 unsigned int i;
909
553 for (i = 3; i < SLOT_COUNT; ++i) 910 for (i = 0; i < SLOT_COUNT; ++i)
554 CXINC; 911 CXINC;
555 } 912
556 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 913 cxstack_ix -= SLOT_COUNT; /* undo allocation */
914 }
557 915
558 c->mainstack = PL_mainstack; 916 c->mainstack = PL_mainstack;
559 917
560 { 918 {
561 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 919 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
562 920
563 slot->defav = GvAV (PL_defgv); 921#if CORO_JIT
564 slot->defsv = DEFSV; 922 save_perl_slots (slot);
565 slot->errsv = ERRSV; 923#else
566 slot->irsgv = GvSV (irsgv);
567
568 #define VAR(name,type) slot->name = PL_ ## name; 924 #define VARx(name,expr,type) slot->name = expr;
569 # include "state.h" 925 #include "state.h"
570 #undef VAR 926#endif
571 } 927 }
572} 928}
573 929
574/* 930/*
575 * allocate various perl stacks. This is an exact copy 931 * allocate various perl stacks. This is almost an exact copy
576 * of perl.c:init_stacks, except that it uses less memory 932 * of perl.c:init_stacks, except that it uses less memory
577 * on the (sometimes correct) assumption that coroutines do 933 * on the (sometimes correct) assumption that coroutines do
578 * not usually need a lot of stackspace. 934 * not usually need a lot of stackspace.
579 */ 935 */
580#if CORO_PREFER_PERL_FUNCTIONS 936#if CORO_PREFER_PERL_FUNCTIONS
581# define coro_init_stacks init_stacks 937# define coro_init_stacks(thx) init_stacks ()
582#else 938#else
583static void 939static void
584coro_init_stacks (pTHX) 940coro_init_stacks (pTHX)
585{ 941{
586 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() */
587 PL_curstackinfo->si_type = PERLSI_MAIN; 943 PL_curstackinfo->si_type = PERLSI_MAIN;
588 PL_curstack = PL_curstackinfo->si_stack; 944 PL_curstack = PL_curstackinfo->si_stack;
589 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 945 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
590 946
591 PL_stack_base = AvARRAY(PL_curstack); 947 PL_stack_base = AvARRAY(PL_curstack);
… …
606#endif 962#endif
607 963
608 New(54,PL_scopestack,8,I32); 964 New(54,PL_scopestack,8,I32);
609 PL_scopestack_ix = 0; 965 PL_scopestack_ix = 0;
610 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
611 970
612 New(54,PL_savestack,24,ANY); 971 New(54,PL_savestack,24,ANY);
613 PL_savestack_ix = 0; 972 PL_savestack_ix = 0;
614 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
615 979
616#if !PERL_VERSION_ATLEAST (5,10,0) 980#if !PERL_VERSION_ATLEAST (5,10,0)
617 New(54,PL_retstack,4,OP*); 981 New(54,PL_retstack,4,OP*);
618 PL_retstack_ix = 0; 982 PL_retstack_ix = 0;
619 PL_retstack_max = 4; 983 PL_retstack_max = 4;
… …
623 987
624/* 988/*
625 * destroy the stacks, the callchain etc... 989 * destroy the stacks, the callchain etc...
626 */ 990 */
627static void 991static void
628coro_destroy_stacks (pTHX) 992coro_destruct_stacks (pTHX)
629{ 993{
630 while (PL_curstackinfo->si_next) 994 while (PL_curstackinfo->si_next)
631 PL_curstackinfo = PL_curstackinfo->si_next; 995 PL_curstackinfo = PL_curstackinfo->si_next;
632 996
633 while (PL_curstackinfo) 997 while (PL_curstackinfo)
… …
643 } 1007 }
644 1008
645 Safefree (PL_tmps_stack); 1009 Safefree (PL_tmps_stack);
646 Safefree (PL_markstack); 1010 Safefree (PL_markstack);
647 Safefree (PL_scopestack); 1011 Safefree (PL_scopestack);
1012#if HAS_SCOPESTACK_NAME
1013 Safefree (PL_scopestack_name);
1014#endif
648 Safefree (PL_savestack); 1015 Safefree (PL_savestack);
649#if !PERL_VERSION_ATLEAST (5,10,0) 1016#if !PERL_VERSION_ATLEAST (5,10,0)
650 Safefree (PL_retstack); 1017 Safefree (PL_retstack);
651#endif 1018#endif
652} 1019}
653 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
654static size_t 1030static size_t
655coro_rss (pTHX_ struct coro *coro) 1031coro_rss (pTHX_ struct coro *coro)
656{ 1032{
657 size_t rss = sizeof (*coro); 1033 size_t rss = sizeof (*coro);
658 1034
659 if (coro->mainstack) 1035 if (coro->mainstack)
660 { 1036 {
661 perl_slots tmp_slot;
662 perl_slots *slot;
663
664 if (coro->flags & CF_RUNNING) 1037 if (coro->flags & CF_RUNNING)
665 { 1038 {
666 slot = &tmp_slot; 1039 #define SYM(sym) PL_ ## sym
667 1040 CORO_RSS;
668 #define VAR(name,type) slot->name = PL_ ## name;
669 # include "state.h"
670 #undef VAR 1041 #undef SYM
671 } 1042 }
672 else 1043 else
673 slot = coro->slot;
674
675 if (slot)
676 { 1044 {
677 rss += sizeof (slot->curstackinfo); 1045 #define SYM(sym) coro->slot->sym
678 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1046 CORO_RSS;
679 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 1047 #undef SYM
680 rss += slot->tmps_max * sizeof (SV *);
681 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
682 rss += slot->scopestack_max * sizeof (I32);
683 rss += slot->savestack_max * sizeof (ANY);
684
685#if !PERL_VERSION_ATLEAST (5,10,0)
686 rss += slot->retstack_max * sizeof (OP *);
687#endif
688 } 1048 }
689 } 1049 }
690 1050
691 return rss; 1051 return rss;
692} 1052}
693 1053
694/** coroutine stack handling ************************************************/ 1054/** provide custom get/set/clear methods for %SIG elements ******************/
695
696static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
698static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
699 1055
700/* apparently < 5.8.8 */ 1056/* apparently < 5.8.8 */
701#ifndef MgPV_nolen_const 1057#ifndef MgPV_nolen_const
702#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ 1058#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
703 SvPV_nolen((SV*)((mg)->mg_ptr)) : \ 1059 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
704 (const char*)(mg)->mg_ptr) 1060 (const char*)(mg)->mg_ptr)
705#endif 1061#endif
706 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 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1070 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1071 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1072 return 1;
1073}
1074
1075/* perl does not have a %SIG vtbl, we provide one so we can override */
1076/* the cwvtblagic for %SIG members */
1077static const MGVTBL coro_sig_vtbl = {
1078 0, 0, 0, 0, 0,
1079 coro_sig_copy
1080};
1081
707/* 1082/*
708 * This overrides the default magic get method of %SIG elements. 1083 * This overrides the default magic get method of %SIG elements.
709 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 1084 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
710 * and instead of tryign to save and restore the hash elements, we just provide 1085 * and instead of trying to save and restore the hash elements (extremely slow),
711 * readback here. 1086 * we just provide our own readback here.
712 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
713 * not expecting this to actually change the hook. This is a potential problem
714 * when a schedule happens then, but we ignore this.
715 */ 1087 */
716static int 1088static int ecb_cold
717coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 1089coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
718{ 1090{
719 const char *s = MgPV_nolen_const (mg); 1091 const char *s = MgPV_nolen_const (mg);
720 1092
721 if (*s == '_') 1093 if (*s == '_')
722 { 1094 {
723 SV **svp = 0; 1095 SV **svp = 0;
724 1096
725 if (strEQ (s, "__DIE__" )) svp = &PL_diehook; 1097 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
726 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1098 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
727 1099
728 if (svp) 1100 if (svp)
729 { 1101 {
730 sv_setsv (sv, *svp ? *svp : &PL_sv_undef); 1102 SV *ssv;
1103
1104 if (!*svp)
1105 ssv = &PL_sv_undef;
1106 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1107 ssv = sv_2mortal (newRV_inc (*svp));
1108 else
1109 ssv = *svp;
1110
1111 sv_setsv (sv, ssv);
731 return 0; 1112 return 0;
732 } 1113 }
733 } 1114 }
734 1115
735 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 1116 return PL_vtbl_sigelem.svt_get ? PL_vtbl_sigelem.svt_get (aTHX_ sv, mg) : 0;
736} 1117}
737 1118
738static int 1119static int ecb_cold
739coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg) 1120coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
740{ 1121{
741 const char *s = MgPV_nolen_const (mg); 1122 const char *s = MgPV_nolen_const (mg);
742 1123
743 if (*s == '_') 1124 if (*s == '_')
… …
754 SvREFCNT_dec (old); 1135 SvREFCNT_dec (old);
755 return 0; 1136 return 0;
756 } 1137 }
757 } 1138 }
758 1139
759 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0; 1140 return PL_vtbl_sigelem.svt_clear ? PL_vtbl_sigelem.svt_clear (aTHX_ sv, mg) : 0;
760} 1141}
761 1142
762static int 1143static int ecb_cold
763coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 1144coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
764{ 1145{
765 const char *s = MgPV_nolen_const (mg); 1146 const char *s = MgPV_nolen_const (mg);
766 1147
767 if (*s == '_') 1148 if (*s == '_')
… …
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1153 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773 1154
774 if (svp) 1155 if (svp)
775 { 1156 {
776 SV *old = *svp; 1157 SV *old = *svp;
777 *svp = newSVsv (sv); 1158 *svp = SvOK (sv) ? newSVsv (sv) : 0;
778 SvREFCNT_dec (old); 1159 SvREFCNT_dec (old);
779 return 0; 1160 return 0;
780 } 1161 }
781 } 1162 }
782 1163
783 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1164 return PL_vtbl_sigelem.svt_set ? PL_vtbl_sigelem.svt_set (aTHX_ sv, mg) : 0;
784} 1165}
785 1166
1167static void
1168prepare_nop (pTHX_ struct coro_transfer_args *ta)
1169{
1170 /* kind of mega-hacky, but works */
1171 ta->next = ta->prev = (struct coro *)ta;
1172}
1173
786static void 1174static int
1175slf_check_nop (pTHX_ struct CoroSLF *frame)
1176{
1177 return 0;
1178}
1179
1180static int
1181slf_check_repeat (pTHX_ struct CoroSLF *frame)
1182{
1183 return 1;
1184}
1185
1186/** coroutine stack handling ************************************************/
1187
1188static UNOP init_perl_op;
1189
1190ecb_noinline static void /* noinline to keep it out of the transfer fast path */
787coro_setup (pTHX_ struct coro *coro) 1191init_perl (pTHX_ struct coro *coro)
788{ 1192{
789 /* 1193 /*
790 * emulate part of the perl startup here. 1194 * emulate part of the perl startup here.
791 */ 1195 */
792 coro_init_stacks (aTHX); 1196 coro_init_stacks (aTHX);
793 1197
794 PL_runops = RUNOPS_DEFAULT; 1198 PL_runops = RUNOPS_DEFAULT;
795 PL_curcop = &PL_compiling; 1199 PL_curcop = &PL_compiling;
796 PL_in_eval = EVAL_NULL; 1200 PL_in_eval = EVAL_NULL;
797 PL_comppad = 0; 1201 PL_comppad = 0;
1202 PL_comppad_name = 0;
1203 PL_comppad_name_fill = 0;
1204 PL_comppad_name_floor = 0;
798 PL_curpm = 0; 1205 PL_curpm = 0;
799 PL_curpad = 0; 1206 PL_curpad = 0;
800 PL_localizing = 0; 1207 PL_localizing = 0;
801 PL_dirty = 0;
802 PL_restartop = 0; 1208 PL_restartop = 0;
803#if PERL_VERSION_ATLEAST (5,10,0) 1209#if PERL_VERSION_ATLEAST (5,10,0)
804 PL_parser = 0; 1210 PL_parser = 0;
805#endif 1211#endif
1212 PL_hints = 0;
806 1213
807 /* recreate the die/warn hooks */ 1214 /* recreate the die/warn hooks */
808 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1215 PL_diehook = SvREFCNT_inc (rv_diehook);
809 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1216 PL_warnhook = SvREFCNT_inc (rv_warnhook);
810 1217
811 GvSV (PL_defgv) = newSV (0); 1218 GvSV (PL_defgv) = newSV (0);
812 GvAV (PL_defgv) = coro->args; coro->args = 0; 1219 GvAV (PL_defgv) = coro->args; coro->args = 0;
813 GvSV (PL_errgv) = newSV (0); 1220 GvSV (PL_errgv) = newSV (0);
814 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1221 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1222 GvHV (PL_hintgv) = newHV ();
1223#if PERL_VERSION_ATLEAST (5,10,0)
1224 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1225#endif
815 PL_rs = newSVsv (GvSV (irsgv)); 1226 PL_rs = newSVsv (GvSV (irsgv));
816 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1227 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
817 1228
818 { 1229 {
819 dSP; 1230 dSP;
820 LOGOP myop; 1231 UNOP myop;
821 1232
822 Zero (&myop, 1, LOGOP); 1233 Zero (&myop, 1, UNOP);
823 myop.op_next = Nullop; 1234 myop.op_next = Nullop;
1235 myop.op_type = OP_ENTERSUB;
824 myop.op_flags = OPf_WANT_VOID; 1236 myop.op_flags = OPf_WANT_VOID;
825 1237
826 PUSHMARK (SP); 1238 PUSHMARK (SP);
827 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1239 PUSHs ((SV *)coro->startcv);
828 PUTBACK; 1240 PUTBACK;
829 PL_op = (OP *)&myop; 1241 PL_op = (OP *)&myop;
830 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1242 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
831 SPAGAIN;
832 } 1243 }
833 1244
834 /* this newly created coroutine might be run on an existing cctx which most 1245 /* this newly created coroutine might be run on an existing cctx which most
835 * likely was suspended in set_stacklevel, called from entersub. 1246 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
836 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837 * so we ENTER here for symmetry
838 */ 1247 */
839 ENTER; 1248 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
840} 1249 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1250 slf_frame.destroy = 0;
841 1251
1252 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1253 init_perl_op.op_next = PL_op;
1254 init_perl_op.op_type = OP_ENTERSUB;
1255 init_perl_op.op_ppaddr = pp_slf;
1256 /* no flags etc. required, as an init function won't be called */
1257
1258 PL_op = (OP *)&init_perl_op;
1259
1260 /* copy throw, in case it was set before init_perl */
1261 CORO_THROW = coro->except;
1262
1263 SWAP_SVS_ENTER (coro);
1264
1265 if (ecb_expect_false (enable_times))
1266 {
1267 coro_times_update ();
1268 coro_times_sub (coro);
1269 }
1270}
1271
842static void 1272static void
843coro_destroy (pTHX_ struct coro *coro) 1273coro_unwind_stacks (pTHX)
844{ 1274{
845 if (!IN_DESTRUCT) 1275 if (!IN_DESTRUCT)
846 { 1276 {
847 /* restore all saved variables and stuff */ 1277 /* restore all saved variables and stuff */
848 LEAVE_SCOPE (0); 1278 LEAVE_SCOPE (0);
… …
856 POPSTACK_TO (PL_mainstack); 1286 POPSTACK_TO (PL_mainstack);
857 1287
858 /* unwind main stack */ 1288 /* unwind main stack */
859 dounwind (-1); 1289 dounwind (-1);
860 } 1290 }
1291}
861 1292
862 SvREFCNT_dec (GvSV (PL_defgv)); 1293static void
863 SvREFCNT_dec (GvAV (PL_defgv)); 1294destroy_perl (pTHX_ struct coro *coro)
864 SvREFCNT_dec (GvSV (PL_errgv)); 1295{
865 SvREFCNT_dec (PL_defoutgv); 1296 SV *svf [9];
866 SvREFCNT_dec (PL_rs);
867 SvREFCNT_dec (GvSV (irsgv));
868 1297
869 SvREFCNT_dec (PL_diehook);
870 SvREFCNT_dec (PL_warnhook);
871 1298 {
1299 SV *old_current = SvRV (coro_current);
1300 struct coro *current = SvSTATE (old_current);
1301
1302 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1303
1304 save_perl (aTHX_ current);
1305
1306 /* this will cause transfer_check to croak on block*/
1307 SvRV_set (coro_current, (SV *)coro->hv);
1308
1309 load_perl (aTHX_ coro);
1310
1311 /* restore swapped sv's */
1312 SWAP_SVS_LEAVE (coro);
1313
1314 coro_unwind_stacks (aTHX);
1315
1316 coro_destruct_stacks (aTHX);
1317
1318 /* now save some sv's to be free'd later */
1319 svf [0] = GvSV (PL_defgv);
1320 svf [1] = (SV *)GvAV (PL_defgv);
1321 svf [2] = GvSV (PL_errgv);
1322 svf [3] = (SV *)PL_defoutgv;
1323 svf [4] = PL_rs;
1324 svf [5] = GvSV (irsgv);
1325 svf [6] = (SV *)GvHV (PL_hintgv);
1326 svf [7] = PL_diehook;
1327 svf [8] = PL_warnhook;
1328 assert (9 == sizeof (svf) / sizeof (*svf));
1329
1330 SvRV_set (coro_current, old_current);
1331
1332 load_perl (aTHX_ current);
1333 }
1334
1335 {
1336 unsigned int i;
1337
1338 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1339 SvREFCNT_dec (svf [i]);
1340
872 SvREFCNT_dec (coro->saved_deffh); 1341 SvREFCNT_dec (coro->saved_deffh);
873 SvREFCNT_dec (coro->throw); 1342 SvREFCNT_dec (coro->rouse_cb);
874 1343 SvREFCNT_dec (coro->invoke_cb);
875 coro_destroy_stacks (aTHX); 1344 SvREFCNT_dec (coro->invoke_av);
1345 SvREFCNT_dec (coro->on_enter_xs);
1346 SvREFCNT_dec (coro->on_leave_xs);
1347 }
876} 1348}
877 1349
878static void 1350ecb_inline void
879free_coro_mortal (pTHX) 1351free_coro_mortal (pTHX)
880{ 1352{
881 if (expect_true (coro_mortal)) 1353 if (ecb_expect_true (coro_mortal))
882 { 1354 {
883 SvREFCNT_dec (coro_mortal); 1355 SvREFCNT_dec ((SV *)coro_mortal);
884 coro_mortal = 0; 1356 coro_mortal = 0;
885 } 1357 }
886} 1358}
887 1359
888static int 1360static int
889runops_trace (pTHX) 1361runops_trace (pTHX)
890{ 1362{
891 COP *oldcop = 0; 1363 COP *oldcop = 0;
892 int oldcxix = -2; 1364 int oldcxix = -2;
893 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
894 coro_cctx *cctx = coro->cctx;
895 1365
896 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1366 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
897 { 1367 {
898 PERL_ASYNC_CHECK (); 1368 PERL_ASYNC_CHECK ();
899 1369
900 if (cctx->flags & CC_TRACE_ALL) 1370 if (cctx_current->flags & CC_TRACE_ALL)
901 { 1371 {
902 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1372 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
903 { 1373 {
904 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1374 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
905 SV **bot, **top; 1375 SV **bot, **top;
906 AV *av = newAV (); /* return values */ 1376 AV *av = newAV (); /* return values */
907 SV **cb; 1377 SV **cb;
… …
944 1414
945 if (PL_curcop != &PL_compiling) 1415 if (PL_curcop != &PL_compiling)
946 { 1416 {
947 SV **cb; 1417 SV **cb;
948 1418
949 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1419 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
950 { 1420 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1421 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952 1422
953 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1423 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
954 { 1424 {
955 runops_proc_t old_runops = PL_runops;
956 dSP; 1425 dSP;
957 GV *gv = CvGV (cx->blk_sub.cv); 1426 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0)); 1427 SV *fullname = sv_2mortal (newSV (0));
959 1428
960 if (isGV (gv)) 1429 if (isGV (gv))
… …
965 SAVETMPS; 1434 SAVETMPS;
966 EXTEND (SP, 3); 1435 EXTEND (SP, 3);
967 PUSHMARK (SP); 1436 PUSHMARK (SP);
968 PUSHs (&PL_sv_yes); 1437 PUSHs (&PL_sv_yes);
969 PUSHs (fullname); 1438 PUSHs (fullname);
970 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1439 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
971 PUTBACK; 1440 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1441 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1442 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN; 1443 SPAGAIN;
975 FREETMPS; 1444 FREETMPS;
… …
978 } 1447 }
979 1448
980 oldcxix = cxstack_ix; 1449 oldcxix = cxstack_ix;
981 } 1450 }
982 1451
983 if (cctx->flags & CC_TRACE_LINE) 1452 if (cctx_current->flags & CC_TRACE_LINE)
984 { 1453 {
985 dSP; 1454 dSP;
986 1455
987 PL_runops = RUNOPS_DEFAULT; 1456 PL_runops = RUNOPS_DEFAULT;
988 ENTER; 1457 ENTER;
… …
1007 1476
1008 TAINT_NOT; 1477 TAINT_NOT;
1009 return 0; 1478 return 0;
1010} 1479}
1011 1480
1012/* inject a fake call to Coro::State::_cctx_init into the execution */ 1481static struct CoroSLF cctx_ssl_frame;
1013/* _cctx_init should be careful, as it could be called at almost any time */
1014/* during execution of a perl program */
1015static void NOINLINE
1016cctx_prepare (pTHX_ coro_cctx *cctx)
1017{
1018 dSP;
1019 LOGOP myop;
1020 1482
1483static void
1484slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1485{
1486 ta->prev = 0;
1487}
1488
1489static int
1490slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1491{
1492 *frame = cctx_ssl_frame;
1493
1494 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1495}
1496
1497/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1498static void ecb_noinline
1499cctx_prepare (pTHX)
1500{
1021 PL_top_env = &PL_start_env; 1501 PL_top_env = &PL_start_env;
1022 1502
1023 if (cctx->flags & CC_TRACE) 1503 if (cctx_current->flags & CC_TRACE)
1024 PL_runops = runops_trace; 1504 PL_runops = runops_trace;
1025 1505
1026 Zero (&myop, 1, LOGOP); 1506 /* we already must be executing an SLF op, there is no other valid way
1027 myop.op_next = PL_op; 1507 * that can lead to creation of a new cctx */
1028 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1508 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1509 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1029 1510
1030 PUSHMARK (SP); 1511 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1031 EXTEND (SP, 2); 1512 cctx_ssl_frame = slf_frame;
1032 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1513
1033 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1514 slf_frame.prepare = slf_prepare_set_stacklevel;
1034 PUTBACK; 1515 slf_frame.check = slf_check_set_stacklevel;
1035 PL_op = (OP *)&myop; 1516}
1036 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1517
1037 SPAGAIN; 1518/* the tail of transfer: execute stuff we can only do after a transfer */
1519ecb_inline void
1520transfer_tail (pTHX)
1521{
1522 free_coro_mortal (aTHX);
1523}
1524
1525/* try to exit the same way perl's main function would do */
1526/* we do not bother resetting the environment or other things *7
1527/* that are not, uhm, essential */
1528/* this obviously also doesn't work when perl is embedded */
1529static void ecb_noinline ecb_cold
1530perlish_exit (pTHX)
1531{
1532 int exitstatus = perl_destruct (PL_curinterp);
1533 perl_free (PL_curinterp);
1534 exit (exitstatus);
1038} 1535}
1039 1536
1040/* 1537/*
1041 * this is a _very_ stripped down perl interpreter ;) 1538 * this is a _very_ stripped down perl interpreter ;)
1042 */ 1539 */
1043static void 1540static void
1044cctx_run (void *arg) 1541cctx_run (void *arg)
1045{ 1542{
1543#ifdef USE_ITHREADS
1544# if CORO_PTHREAD
1545 PERL_SET_CONTEXT (coro_thx);
1546# endif
1547#endif
1548 {
1046 dTHX; 1549 dTHX;
1047 1550
1048 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1551 /* normally we would need to skip the entersub here */
1049 UNLOCK; 1552 /* not doing so will re-execute it, which is exactly what we want */
1050
1051 /* we now skip the entersub that lead to transfer() */
1052 PL_op = PL_op->op_next; 1553 /* PL_nop = PL_nop->op_next */
1053 1554
1054 /* inject a fake subroutine call to cctx_init */ 1555 /* inject a fake subroutine call to cctx_init */
1055 cctx_prepare (aTHX_ (coro_cctx *)arg); 1556 cctx_prepare (aTHX);
1056 1557
1558 /* cctx_run is the alternative tail of transfer() */
1559 transfer_tail (aTHX);
1560
1057 /* somebody or something will hit me for both perl_run and PL_restartop */ 1561 /* somebody or something will hit me for both perl_run and PL_restartop */
1058 PL_restartop = PL_op; 1562 PL_restartop = PL_op;
1059 perl_run (PL_curinterp); 1563 perl_run (PL_curinterp);
1060
1061 /* 1564 /*
1565 * Unfortunately, there is no way to get at the return values of the
1566 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1567 * runtime errors here, as this is just a random interpreter, not a thread.
1568 */
1569
1570 /*
1571 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1572 * requires PL_scopestack_ix, so do it here if required.
1573 */
1574 if (!PL_scopestack_ix)
1575 ENTER;
1576
1577 /*
1062 * If perl-run returns we assume exit() was being called or the coro 1578 * If perl-run returns we assume exit() was being called or the coro
1063 * fell off the end, which seems to be the only valid (non-bug) 1579 * fell off the end, which seems to be the only valid (non-bug)
1064 * reason for perl_run to return. We try to exit by jumping to the 1580 * reason for perl_run to return. We try to mimic whatever perl is normally
1065 * bootstrap-time "top" top_env, as we cannot restore the "main" 1581 * doing in that case. YMMV.
1066 * coroutine as Coro has no such concept
1067 */ 1582 */
1068 PL_top_env = main_top_env; 1583 perlish_exit (aTHX);
1069 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1584 }
1070} 1585}
1071 1586
1072static coro_cctx * 1587static coro_cctx *
1073cctx_new () 1588cctx_new (void)
1074{ 1589{
1075 coro_cctx *cctx; 1590 coro_cctx *cctx;
1076 void *stack_start;
1077 size_t stack_size;
1078 1591
1079 ++cctx_count; 1592 ++cctx_count;
1080
1081 Newz (0, cctx, 1, coro_cctx); 1593 New (0, cctx, 1, coro_cctx);
1082 1594
1083#if HAVE_MMAP 1595 cctx->gen = cctx_gen;
1084 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1596 cctx->flags = 0;
1085 /* mmap supposedly does allocate-on-write for us */ 1597 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1086 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1087 1598
1088 if (cctx->sptr != (void *)-1) 1599 return cctx;
1089 { 1600}
1090# if CORO_STACKGUARD 1601
1091 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1602/* create a new cctx only suitable as source */
1092# endif 1603static coro_cctx *
1093 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1604cctx_new_empty (void)
1094 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1605{
1095 cctx->flags |= CC_MAPPED; 1606 coro_cctx *cctx = cctx_new ();
1607
1608 cctx->stack.sptr = 0;
1609 coro_create (&cctx->cctx, 0, 0, 0, 0);
1610
1611 return cctx;
1612}
1613
1614/* create a new cctx suitable as destination/running a perl interpreter */
1615static coro_cctx *
1616cctx_new_run (void)
1617{
1618 coro_cctx *cctx = cctx_new ();
1619
1620 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1096 } 1621 {
1097 else
1098#endif
1099 {
1100 cctx->ssize = coro_stacksize * (long)sizeof (long);
1101 New (0, cctx->sptr, coro_stacksize, long);
1102
1103 if (!cctx->sptr)
1104 {
1105 perror ("FATAL: unable to allocate stack for coroutine"); 1622 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1106 _exit (EXIT_FAILURE); 1623 _exit (EXIT_FAILURE);
1107 }
1108
1109 stack_start = cctx->sptr;
1110 stack_size = cctx->ssize;
1111 } 1624 }
1112 1625
1113 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1114 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1626 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1115 1627
1116 return cctx; 1628 return cctx;
1117} 1629}
1118 1630
1119static void 1631static void
1120cctx_destroy (coro_cctx *cctx) 1632cctx_destroy (coro_cctx *cctx)
1121{ 1633{
1122 if (!cctx) 1634 if (!cctx)
1123 return; 1635 return;
1124 1636
1637 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1638
1125 --cctx_count; 1639 --cctx_count;
1640 coro_destroy (&cctx->cctx);
1126 1641
1127#if CORO_USE_VALGRIND 1642 coro_stack_free (&cctx->stack);
1128 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1129#endif
1130
1131#if HAVE_MMAP
1132 if (cctx->flags & CC_MAPPED)
1133 munmap (cctx->sptr, cctx->ssize);
1134 else
1135#endif
1136 Safefree (cctx->sptr);
1137 1643
1138 Safefree (cctx); 1644 Safefree (cctx);
1139} 1645}
1140 1646
1141/* wether this cctx should be destructed */ 1647/* wether this cctx should be destructed */
1142#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1648#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1143 1649
1144static coro_cctx * 1650static coro_cctx *
1145cctx_get (pTHX) 1651cctx_get (pTHX)
1146{ 1652{
1147 while (expect_true (cctx_first)) 1653 while (ecb_expect_true (cctx_first))
1148 { 1654 {
1149 coro_cctx *cctx = cctx_first; 1655 coro_cctx *cctx = cctx_first;
1150 cctx_first = cctx->next; 1656 cctx_first = cctx->next;
1151 --cctx_idle; 1657 --cctx_idle;
1152 1658
1153 if (expect_true (!CCTX_EXPIRED (cctx))) 1659 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1154 return cctx; 1660 return cctx;
1155 1661
1156 cctx_destroy (cctx); 1662 cctx_destroy (cctx);
1157 } 1663 }
1158 1664
1159 return cctx_new (); 1665 return cctx_new_run ();
1160} 1666}
1161 1667
1162static void 1668static void
1163cctx_put (coro_cctx *cctx) 1669cctx_put (coro_cctx *cctx)
1164{ 1670{
1671 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1672
1165 /* free another cctx if overlimit */ 1673 /* free another cctx if overlimit */
1166 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1674 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1167 { 1675 {
1168 coro_cctx *first = cctx_first; 1676 coro_cctx *first = cctx_first;
1169 cctx_first = first->next; 1677 cctx_first = first->next;
1170 --cctx_idle; 1678 --cctx_idle;
1171 1679
… …
1180/** coroutine switching *****************************************************/ 1688/** coroutine switching *****************************************************/
1181 1689
1182static void 1690static void
1183transfer_check (pTHX_ struct coro *prev, struct coro *next) 1691transfer_check (pTHX_ struct coro *prev, struct coro *next)
1184{ 1692{
1693 /* TODO: throwing up here is considered harmful */
1694
1185 if (expect_true (prev != next)) 1695 if (ecb_expect_true (prev != next))
1186 { 1696 {
1187 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1697 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1188 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1698 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1189 1699
1190 if (expect_false (next->flags & CF_RUNNING)) 1700 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1191 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1192
1193 if (expect_false (next->flags & CF_DESTROYED))
1194 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1701 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1195 1702
1196#if !PERL_VERSION_ATLEAST (5,10,0) 1703#if !PERL_VERSION_ATLEAST (5,10,0)
1197 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1704 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1198 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1705 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1199#endif 1706#endif
1200 } 1707 }
1201} 1708}
1202 1709
1203/* always use the TRANSFER macro */ 1710/* always use the TRANSFER macro */
1204static void NOINLINE 1711static void ecb_noinline /* noinline so we have a fixed stackframe */
1205transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1712transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1206{ 1713{
1207 dSTACKLEVEL; 1714 dSTACKLEVEL;
1208 static volatile int has_throw;
1209 1715
1210 /* sometimes transfer is only called to set idle_sp */ 1716 /* sometimes transfer is only called to set idle_sp */
1211 if (expect_false (!next)) 1717 if (ecb_expect_false (!prev))
1212 { 1718 {
1213 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1719 cctx_current->idle_sp = STACKLEVEL;
1214 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1720 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1215 } 1721 }
1216 else if (expect_true (prev != next)) 1722 else if (ecb_expect_true (prev != next))
1217 { 1723 {
1218 coro_cctx *prev__cctx; 1724 coro_cctx *cctx_prev;
1219 1725
1220 if (expect_false (prev->flags & CF_NEW)) 1726 if (ecb_expect_false (prev->flags & CF_NEW))
1221 { 1727 {
1222 /* create a new empty context */ 1728 /* create a new empty/source context */
1223 Newz (0, prev->cctx, 1, coro_cctx);
1224 prev->flags &= ~CF_NEW; 1729 prev->flags &= ~CF_NEW;
1225 prev->flags |= CF_RUNNING; 1730 prev->flags |= CF_RUNNING;
1226 } 1731 }
1227 1732
1228 prev->flags &= ~CF_RUNNING; 1733 prev->flags &= ~CF_RUNNING;
1229 next->flags |= CF_RUNNING; 1734 next->flags |= CF_RUNNING;
1230 1735
1231 LOCK;
1232
1233 /* first get rid of the old state */ 1736 /* first get rid of the old state */
1234 save_perl (aTHX_ prev); 1737 save_perl (aTHX_ prev);
1235 1738
1236 if (expect_false (next->flags & CF_NEW)) 1739 if (ecb_expect_false (next->flags & CF_NEW))
1237 { 1740 {
1238 /* need to start coroutine */ 1741 /* need to start coroutine */
1239 next->flags &= ~CF_NEW; 1742 next->flags &= ~CF_NEW;
1240 /* setup coroutine call */ 1743 /* setup coroutine call */
1241 coro_setup (aTHX_ next); 1744 init_perl (aTHX_ next);
1242 } 1745 }
1243 else 1746 else
1244 load_perl (aTHX_ next); 1747 load_perl (aTHX_ next);
1245 1748
1246 prev__cctx = prev->cctx;
1247
1248 /* possibly "free" the cctx */ 1749 /* possibly untie and reuse the cctx */
1249 if (expect_true ( 1750 if (ecb_expect_true (
1250 prev__cctx->idle_sp == STACKLEVEL 1751 cctx_current->idle_sp == STACKLEVEL
1251 && !(prev__cctx->flags & CC_TRACE) 1752 && !(cctx_current->flags & CC_TRACE)
1252 && !force_cctx 1753 && !force_cctx
1253 )) 1754 ))
1254 { 1755 {
1255 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1756 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1256 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1757 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1257 1758
1258 prev->cctx = 0;
1259
1260 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1759 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1261 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1760 /* without this the next cctx_get might destroy the running cctx while still in use */
1262 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1761 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1263 if (!next->cctx) 1762 if (ecb_expect_true (!next->cctx))
1264 next->cctx = cctx_get (aTHX); 1763 next->cctx = cctx_get (aTHX);
1265 1764
1266 cctx_put (prev__cctx); 1765 cctx_put (cctx_current);
1267 } 1766 }
1767 else
1768 prev->cctx = cctx_current;
1268 1769
1269 ++next->usecount; 1770 ++next->usecount;
1270 1771
1271 if (expect_true (!next->cctx)) 1772 cctx_prev = cctx_current;
1272 next->cctx = cctx_get (aTHX); 1773 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1273 1774
1274 has_throw = !!next->throw; 1775 next->cctx = 0;
1275 1776
1276 if (expect_false (prev__cctx != next->cctx)) 1777 if (ecb_expect_false (cctx_prev != cctx_current))
1277 { 1778 {
1278 prev__cctx->top_env = PL_top_env; 1779 cctx_prev->top_env = PL_top_env;
1279 PL_top_env = next->cctx->top_env; 1780 PL_top_env = cctx_current->top_env;
1280 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1781 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1281 } 1782 }
1282 1783
1283 free_coro_mortal (aTHX); 1784 transfer_tail (aTHX);
1284 UNLOCK;
1285
1286 if (expect_false (has_throw))
1287 {
1288 struct coro *coro = SvSTATE (coro_current);
1289
1290 if (coro->throw)
1291 {
1292 SV *exception = coro->throw;
1293 coro->throw = 0;
1294 sv_setsv (ERRSV, exception);
1295 croak (0);
1296 }
1297 }
1298 } 1785 }
1299} 1786}
1300
1301struct transfer_args
1302{
1303 struct coro *prev, *next;
1304};
1305 1787
1306#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1788#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1307#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1789#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308 1790
1309/** high level stuff ********************************************************/ 1791/** high level stuff ********************************************************/
1310 1792
1793/* this function is actually Coro, not Coro::State, but we call it from here */
1794/* because it is convenient - but it hasn't been declared yet for that reason */
1311static int 1795static void
1796coro_call_on_destroy (pTHX_ struct coro *coro);
1797
1798static void
1312coro_state_destroy (pTHX_ struct coro *coro) 1799coro_state_destroy (pTHX_ struct coro *coro)
1313{ 1800{
1314 if (coro->flags & CF_DESTROYED) 1801 if (coro->flags & CF_ZOMBIE)
1315 return 0; 1802 return;
1316 1803
1804 slf_destroy (aTHX_ coro);
1805
1317 coro->flags |= CF_DESTROYED; 1806 coro->flags |= CF_ZOMBIE;
1318 1807
1319 if (coro->flags & CF_READY) 1808 if (coro->flags & CF_READY)
1320 { 1809 {
1321 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1810 /* reduce nready, as destroying a ready coro effectively unreadies it */
1322 /* alternative: look through all ready queues and remove the coro */ 1811 /* alternative: look through all ready queues and remove the coro */
1323 LOCK;
1324 --coro_nready; 1812 --coro_nready;
1325 UNLOCK;
1326 } 1813 }
1327 else 1814 else
1328 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1815 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1329
1330 if (coro->mainstack && coro->mainstack != main_mainstack)
1331 {
1332 struct coro temp;
1333
1334 if (coro->flags & CF_RUNNING)
1335 croak ("FATAL: tried to destroy currently running coroutine");
1336
1337 save_perl (aTHX_ &temp);
1338 load_perl (aTHX_ coro);
1339
1340 coro_destroy (aTHX_ coro);
1341
1342 load_perl (aTHX_ &temp);
1343
1344 coro->slot = 0;
1345 }
1346
1347 cctx_destroy (coro->cctx);
1348 SvREFCNT_dec (coro->args);
1349 1816
1350 if (coro->next) coro->next->prev = coro->prev; 1817 if (coro->next) coro->next->prev = coro->prev;
1351 if (coro->prev) coro->prev->next = coro->next; 1818 if (coro->prev) coro->prev->next = coro->next;
1352 if (coro == coro_first) coro_first = coro->next; 1819 if (coro == coro_first) coro_first = coro->next;
1353 1820
1354 return 1; 1821 if (coro->mainstack
1822 && coro->mainstack != main_mainstack
1823 && coro->slot
1824 && !PL_dirty)
1825 destroy_perl (aTHX_ coro);
1826
1827 cctx_destroy (coro->cctx);
1828 SvREFCNT_dec (coro->startcv);
1829 SvREFCNT_dec (coro->args);
1830 SvREFCNT_dec (coro->swap_sv);
1831 SvREFCNT_dec (CORO_THROW);
1832
1833 coro_call_on_destroy (aTHX_ coro);
1834
1835 /* more destruction mayhem in coro_state_free */
1355} 1836}
1356 1837
1357static int 1838static int
1358coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1839coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1359{ 1840{
1360 struct coro *coro = (struct coro *)mg->mg_ptr; 1841 struct coro *coro = (struct coro *)mg->mg_ptr;
1361 mg->mg_ptr = 0; 1842 mg->mg_ptr = 0;
1362 1843
1363 coro->hv = 0;
1364
1365 if (--coro->refcnt < 0)
1366 {
1367 coro_state_destroy (aTHX_ coro); 1844 coro_state_destroy (aTHX_ coro);
1845 SvREFCNT_dec (coro->on_destroy);
1846 SvREFCNT_dec (coro->status);
1847
1368 Safefree (coro); 1848 Safefree (coro);
1369 }
1370 1849
1371 return 0; 1850 return 0;
1372} 1851}
1373 1852
1374static int 1853static int ecb_cold
1375coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1854coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1376{ 1855{
1377 struct coro *coro = (struct coro *)mg->mg_ptr; 1856 /* called when perl clones the current process the slow way (windows process emulation) */
1378 1857 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1379 ++coro->refcnt; 1858 mg->mg_ptr = 0;
1859 mg->mg_virtual = 0;
1380 1860
1381 return 0; 1861 return 0;
1382} 1862}
1383 1863
1384static MGVTBL coro_state_vtbl = { 1864static MGVTBL coro_state_vtbl = {
… …
1391# define MGf_DUP 0 1871# define MGf_DUP 0
1392#endif 1872#endif
1393}; 1873};
1394 1874
1395static void 1875static void
1396prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1876prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1397{ 1877{
1398 ta->prev = SvSTATE (prev_sv); 1878 ta->prev = SvSTATE (prev_sv);
1399 ta->next = SvSTATE (next_sv); 1879 ta->next = SvSTATE (next_sv);
1400 TRANSFER_CHECK (*ta); 1880 TRANSFER_CHECK (*ta);
1401} 1881}
1402 1882
1403static void 1883static void
1404api_transfer (SV *prev_sv, SV *next_sv) 1884api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1405{ 1885{
1406 dTHX;
1407 struct transfer_args ta; 1886 struct coro_transfer_args ta;
1408 1887
1409 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1888 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1410 TRANSFER (ta, 1); 1889 TRANSFER (ta, 1);
1411} 1890}
1412 1891
1413/** Coro ********************************************************************/ 1892/** Coro ********************************************************************/
1414 1893
1415static void 1894ecb_inline void
1416coro_enq (pTHX_ SV *coro_sv) 1895coro_enq (pTHX_ struct coro *coro)
1417{ 1896{
1418 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1897 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1419}
1420 1898
1421static SV * 1899 SvREFCNT_inc_NN (coro->hv);
1900
1901 coro->next_ready = 0;
1902 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1903 ready [1] = coro;
1904}
1905
1906ecb_inline struct coro *
1422coro_deq (pTHX) 1907coro_deq (pTHX)
1423{ 1908{
1424 int prio; 1909 int prio;
1425 1910
1426 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1911 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1427 if (AvFILLp (coro_ready [prio]) >= 0) 1912 {
1428 return av_shift (coro_ready [prio]); 1913 struct coro **ready = coro_ready [prio];
1914
1915 if (ready [0])
1916 {
1917 struct coro *coro = ready [0];
1918 ready [0] = coro->next_ready;
1919 return coro;
1920 }
1921 }
1429 1922
1430 return 0; 1923 return 0;
1431} 1924}
1432 1925
1926static void
1927invoke_sv_ready_hook_helper (void)
1928{
1929 dTHX;
1930 dSP;
1931
1932 ENTER;
1933 SAVETMPS;
1934
1935 PUSHMARK (SP);
1936 PUTBACK;
1937 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1938
1939 FREETMPS;
1940 LEAVE;
1941}
1942
1433static int 1943static int
1434api_ready (SV *coro_sv) 1944api_ready (pTHX_ SV *coro_sv)
1435{ 1945{
1436 dTHX;
1437 struct coro *coro;
1438 SV *sv_hook;
1439 void (*xs_hook)(void);
1440
1441 if (SvROK (coro_sv))
1442 coro_sv = SvRV (coro_sv);
1443
1444 coro = SvSTATE (coro_sv); 1946 struct coro *coro = SvSTATE (coro_sv);
1445 1947
1446 if (coro->flags & CF_READY) 1948 if (coro->flags & CF_READY)
1447 return 0; 1949 return 0;
1448 1950
1449 coro->flags |= CF_READY; 1951 coro->flags |= CF_READY;
1450 1952
1451 LOCK; 1953 coro_enq (aTHX_ coro);
1452 1954
1453 sv_hook = coro_nready ? 0 : coro_readyhook; 1955 if (!coro_nready++)
1454 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1956 if (coroapi.readyhook)
1455 1957 coroapi.readyhook ();
1456 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1457 ++coro_nready;
1458
1459 UNLOCK;
1460
1461 if (sv_hook)
1462 {
1463 dSP;
1464
1465 ENTER;
1466 SAVETMPS;
1467
1468 PUSHMARK (SP);
1469 PUTBACK;
1470 call_sv (sv_hook, G_DISCARD);
1471 SPAGAIN;
1472
1473 FREETMPS;
1474 LEAVE;
1475 }
1476
1477 if (xs_hook)
1478 xs_hook ();
1479 1958
1480 return 1; 1959 return 1;
1481} 1960}
1482 1961
1483static int 1962static int
1484api_is_ready (SV *coro_sv) 1963api_is_ready (pTHX_ SV *coro_sv)
1485{ 1964{
1486 dTHX;
1487 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1965 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488} 1966}
1489 1967
1490static void 1968/* expects to own a reference to next->hv */
1969ecb_inline void
1491prepare_schedule (pTHX_ struct transfer_args *ta) 1970prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1492{ 1971{
1493 SV *prev_sv, *next_sv;
1494
1495 for (;;)
1496 {
1497 LOCK;
1498 next_sv = coro_deq (aTHX);
1499
1500 /* nothing to schedule: call the idle handler */
1501 if (expect_false (!next_sv))
1502 {
1503 dSP;
1504 UNLOCK;
1505
1506 ENTER;
1507 SAVETMPS;
1508
1509 PUSHMARK (SP);
1510 PUTBACK;
1511 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1512 SPAGAIN;
1513
1514 FREETMPS;
1515 LEAVE;
1516 continue;
1517 }
1518
1519 ta->next = SvSTATE (next_sv);
1520
1521 /* cannot transfer to destroyed coros, skip and look for next */
1522 if (expect_false (ta->next->flags & CF_DESTROYED))
1523 {
1524 UNLOCK;
1525 SvREFCNT_dec (next_sv);
1526 /* coro_nready is already taken care of by destroy */
1527 continue;
1528 }
1529
1530 --coro_nready;
1531 UNLOCK;
1532 break;
1533 }
1534
1535 /* free this only after the transfer */
1536 prev_sv = SvRV (coro_current); 1972 SV *prev_sv = SvRV (coro_current);
1973
1537 ta->prev = SvSTATE (prev_sv); 1974 ta->prev = SvSTATE_hv (prev_sv);
1975 ta->next = next;
1976
1538 TRANSFER_CHECK (*ta); 1977 TRANSFER_CHECK (*ta);
1539 assert (ta->next->flags & CF_READY); 1978
1540 ta->next->flags &= ~CF_READY;
1541 SvRV_set (coro_current, next_sv); 1979 SvRV_set (coro_current, (SV *)next->hv);
1542 1980
1543 LOCK;
1544 free_coro_mortal (aTHX); 1981 free_coro_mortal (aTHX);
1545 coro_mortal = prev_sv; 1982 coro_mortal = prev_sv;
1546 UNLOCK;
1547} 1983}
1548 1984
1549static void 1985static void
1986prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1987{
1988 for (;;)
1989 {
1990 struct coro *next = coro_deq (aTHX);
1991
1992 if (ecb_expect_true (next))
1993 {
1994 /* cannot transfer to destroyed coros, skip and look for next */
1995 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1996 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1997 else
1998 {
1999 next->flags &= ~CF_READY;
2000 --coro_nready;
2001
2002 prepare_schedule_to (aTHX_ ta, next);
2003 break;
2004 }
2005 }
2006 else
2007 {
2008 /* nothing to schedule: call the idle handler */
2009 if (SvROK (sv_idle)
2010 && SvOBJECT (SvRV (sv_idle)))
2011 {
2012 if (SvRV (sv_idle) == SvRV (coro_current))
2013 {
2014 require_pv ("Carp");
2015
2016 {
2017 dSP;
2018
2019 ENTER;
2020 SAVETMPS;
2021
2022 PUSHMARK (SP);
2023 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2024 PUTBACK;
2025 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2026
2027 FREETMPS;
2028 LEAVE;
2029 }
2030 }
2031
2032 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2033 api_ready (aTHX_ SvRV (sv_idle));
2034 --coro_nready;
2035 }
2036 else
2037 {
2038 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2039 dSP;
2040
2041 ENTER;
2042 SAVETMPS;
2043
2044 PUSHMARK (SP);
2045 PUTBACK;
2046 call_sv (sv_idle, G_VOID | G_DISCARD);
2047
2048 FREETMPS;
2049 LEAVE;
2050 }
2051 }
2052 }
2053}
2054
2055ecb_inline void
1550prepare_cede (pTHX_ struct transfer_args *ta) 2056prepare_cede (pTHX_ struct coro_transfer_args *ta)
1551{ 2057{
1552 api_ready (coro_current); 2058 api_ready (aTHX_ coro_current);
1553 prepare_schedule (aTHX_ ta); 2059 prepare_schedule (aTHX_ ta);
1554} 2060}
1555 2061
2062ecb_inline void
2063prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2064{
2065 SV *prev = SvRV (coro_current);
2066
2067 if (coro_nready)
2068 {
2069 prepare_schedule (aTHX_ ta);
2070 api_ready (aTHX_ prev);
2071 }
2072 else
2073 prepare_nop (aTHX_ ta);
2074}
2075
2076static void
2077api_schedule (pTHX)
2078{
2079 struct coro_transfer_args ta;
2080
2081 prepare_schedule (aTHX_ &ta);
2082 TRANSFER (ta, 1);
2083}
2084
2085static void
2086api_schedule_to (pTHX_ SV *coro_sv)
2087{
2088 struct coro_transfer_args ta;
2089 struct coro *next = SvSTATE (coro_sv);
2090
2091 SvREFCNT_inc_NN (coro_sv);
2092 prepare_schedule_to (aTHX_ &ta, next);
2093}
2094
1556static int 2095static int
1557prepare_cede_notself (pTHX_ struct transfer_args *ta) 2096api_cede (pTHX)
1558{ 2097{
1559 if (coro_nready) 2098 struct coro_transfer_args ta;
1560 { 2099
1561 SV *prev = SvRV (coro_current);
1562 prepare_schedule (aTHX_ ta); 2100 prepare_cede (aTHX_ &ta);
1563 api_ready (prev); 2101
2102 if (ecb_expect_true (ta.prev != ta.next))
2103 {
2104 TRANSFER (ta, 1);
1564 return 1; 2105 return 1;
1565 } 2106 }
1566 else 2107 else
1567 return 0; 2108 return 0;
1568} 2109}
1569 2110
1570static void
1571api_schedule (void)
1572{
1573 dTHX;
1574 struct transfer_args ta;
1575
1576 prepare_schedule (aTHX_ &ta);
1577 TRANSFER (ta, 1);
1578}
1579
1580static int 2111static int
1581api_cede (void) 2112api_cede_notself (pTHX)
1582{ 2113{
1583 dTHX; 2114 if (coro_nready)
2115 {
1584 struct transfer_args ta; 2116 struct coro_transfer_args ta;
1585 2117
1586 prepare_cede (aTHX_ &ta); 2118 prepare_cede_notself (aTHX_ &ta);
1587
1588 if (expect_true (ta.prev != ta.next))
1589 {
1590 TRANSFER (ta, 1); 2119 TRANSFER (ta, 1);
1591 return 1; 2120 return 1;
1592 } 2121 }
1593 else 2122 else
1594 return 0; 2123 return 0;
1595} 2124}
1596 2125
1597static int 2126static void
1598api_cede_notself (void)
1599{
1600 dTHX;
1601 struct transfer_args ta;
1602
1603 if (prepare_cede_notself (aTHX_ &ta))
1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1610}
1611
1612static void
1613api_trace (SV *coro_sv, int flags) 2127api_trace (pTHX_ SV *coro_sv, int flags)
1614{ 2128{
1615 dTHX;
1616 struct coro *coro = SvSTATE (coro_sv); 2129 struct coro *coro = SvSTATE (coro_sv);
1617 2130
2131 if (coro->flags & CF_RUNNING)
2132 croak ("cannot enable tracing on a running coroutine, caught");
2133
1618 if (flags & CC_TRACE) 2134 if (flags & CC_TRACE)
1619 { 2135 {
1620 if (!coro->cctx) 2136 if (!coro->cctx)
1621 coro->cctx = cctx_new (); 2137 coro->cctx = cctx_new_run ();
1622 else if (!(coro->cctx->flags & CC_TRACE)) 2138 else if (!(coro->cctx->flags & CC_TRACE))
1623 croak ("cannot enable tracing on coroutine with custom stack"); 2139 croak ("cannot enable tracing on coroutine with custom stack, caught");
1624 2140
1625 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2141 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1626 } 2142 }
1627 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2143 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628 { 2144 {
… …
1633 else 2149 else
1634 coro->slot->runops = RUNOPS_DEFAULT; 2150 coro->slot->runops = RUNOPS_DEFAULT;
1635 } 2151 }
1636} 2152}
1637 2153
2154static void
2155coro_push_av (pTHX_ AV *av, I32 gimme_v)
2156{
2157 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2158 {
2159 dSP;
2160
2161 if (gimme_v == G_SCALAR)
2162 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2163 else
2164 {
2165 int i;
2166 EXTEND (SP, AvFILLp (av) + 1);
2167
2168 for (i = 0; i <= AvFILLp (av); ++i)
2169 PUSHs (AvARRAY (av)[i]);
2170 }
2171
2172 PUTBACK;
2173 }
2174}
2175
2176static void
2177coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2178{
2179 if (!coro->on_destroy)
2180 coro->on_destroy = newAV ();
2181
2182 av_push (coro->on_destroy, cb);
2183}
2184
2185static void
2186slf_destroy_join (pTHX_ struct CoroSLF *frame)
2187{
2188 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2189}
2190
1638static int 2191static int
1639coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2192slf_check_join (pTHX_ struct CoroSLF *frame)
1640{ 2193{
1641 AV *padlist; 2194 struct coro *coro = (struct coro *)frame->data;
1642 AV *av = (AV *)mg->mg_obj;
1643 2195
1644 abort (); 2196 if (!coro->status)
2197 return 1;
2198
2199 frame->destroy = 0;
2200
2201 coro_push_av (aTHX_ coro->status, GIMME_V);
2202
2203 SvREFCNT_dec ((SV *)coro->hv);
1645 2204
1646 return 0; 2205 return 0;
1647} 2206}
1648 2207
1649static MGVTBL coro_gensub_vtbl = { 2208static void
1650 0, 0, 0, 0, 2209slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1651 coro_gensub_free 2210{
1652}; 2211 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2212
2213 if (items > 1)
2214 croak ("join called with too many arguments");
2215
2216 if (coro->status)
2217 frame->prepare = prepare_nop;
2218 else
2219 {
2220 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2221 frame->prepare = prepare_schedule;
2222 }
2223
2224 frame->check = slf_check_join;
2225 frame->destroy = slf_destroy_join;
2226 frame->data = (void *)coro;
2227 SvREFCNT_inc (coro->hv);
2228}
2229
2230static void
2231coro_call_on_destroy (pTHX_ struct coro *coro)
2232{
2233 AV *od = coro->on_destroy;
2234
2235 if (!od)
2236 return;
2237
2238 coro->on_destroy = 0;
2239 sv_2mortal ((SV *)od);
2240
2241 while (AvFILLp (od) >= 0)
2242 {
2243 SV *cb = sv_2mortal (av_pop (od));
2244
2245 /* coro hv's (and only hv's at the moment) are supported as well */
2246 if (SvSTATEhv_p (aTHX_ cb))
2247 api_ready (aTHX_ cb);
2248 else
2249 {
2250 dSP; /* don't disturb outer sp */
2251 PUSHMARK (SP);
2252
2253 if (coro->status)
2254 {
2255 PUTBACK;
2256 coro_push_av (aTHX_ coro->status, G_ARRAY);
2257 SPAGAIN;
2258 }
2259
2260 PUTBACK;
2261 call_sv (cb, G_VOID | G_DISCARD);
2262 }
2263 }
2264}
2265
2266static void
2267coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2268{
2269 AV *av;
2270
2271 if (coro->status)
2272 {
2273 av = coro->status;
2274 av_clear (av);
2275 }
2276 else
2277 av = coro->status = newAV ();
2278
2279 /* items are actually not so common, so optimise for this case */
2280 if (items)
2281 {
2282 int i;
2283
2284 av_extend (av, items - 1);
2285
2286 for (i = 0; i < items; ++i)
2287 av_push (av, SvREFCNT_inc_NN (arg [i]));
2288 }
2289}
2290
2291static void
2292slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2293{
2294 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2295 api_ready (aTHX_ sv_manager);
2296
2297 frame->prepare = prepare_schedule;
2298 frame->check = slf_check_repeat;
2299
2300 /* as a minor optimisation, we could unwind all stacks here */
2301 /* but that puts extra pressure on pp_slf, and is not worth much */
2302 /*coro_unwind_stacks (aTHX);*/
2303}
2304
2305static void
2306slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2307{
2308 HV *coro_hv = (HV *)SvRV (coro_current);
2309
2310 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2311 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2312}
2313
2314static void
2315slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 HV *coro_hv;
2318 struct coro *coro;
2319
2320 if (items <= 0)
2321 croak ("Coro::cancel called without coro object,");
2322
2323 coro = SvSTATE (arg [0]);
2324 coro_hv = coro->hv;
2325
2326 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2327
2328 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2329 {
2330 /* coro currently busy cancelling something, so just notify it */
2331 coro->slf_frame.data = (void *)coro;
2332
2333 frame->prepare = prepare_nop;
2334 frame->check = slf_check_nop;
2335 }
2336 else if (coro_hv == (HV *)SvRV (coro_current))
2337 {
2338 /* cancelling the current coro is allowed, and equals terminate */
2339 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2340 }
2341 else
2342 {
2343 struct coro *self = SvSTATE_current;
2344
2345 if (!self)
2346 croak ("Coro::cancel called outside of thread content,");
2347
2348 /* otherwise we cancel directly, purely for speed reasons
2349 * unfortunately, this requires some magic trickery, as
2350 * somebody else could cancel us, so we have to fight the cancellation.
2351 * this is ugly, and hopefully fully worth the extra speed.
2352 * besides, I can't get the slow-but-safe version working...
2353 */
2354 slf_frame.data = 0;
2355 self->flags |= CF_NOCANCEL;
2356 coro_state_destroy (aTHX_ coro);
2357 self->flags &= ~CF_NOCANCEL;
2358
2359 if (slf_frame.data)
2360 {
2361 /* while we were busy we have been cancelled, so terminate */
2362 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2363 }
2364 else
2365 {
2366 frame->prepare = prepare_nop;
2367 frame->check = slf_check_nop;
2368 }
2369 }
2370}
2371
2372static int
2373slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2374{
2375 frame->prepare = 0;
2376 coro_unwind_stacks (aTHX);
2377
2378 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2379
2380 return 1;
2381}
2382
2383static int
2384safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2385{
2386 if (coro->cctx)
2387 croak ("coro inside C callback, unable to cancel at this time, caught");
2388
2389 if (coro->flags & CF_NEW)
2390 {
2391 coro_set_status (aTHX_ coro, arg, items);
2392 coro_state_destroy (aTHX_ coro);
2393 }
2394 else
2395 {
2396 if (!coro->slf_frame.prepare)
2397 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2398
2399 slf_destroy (aTHX_ coro);
2400
2401 coro_set_status (aTHX_ coro, arg, items);
2402 coro->slf_frame.prepare = prepare_nop;
2403 coro->slf_frame.check = slf_check_safe_cancel;
2404
2405 api_ready (aTHX_ (SV *)coro->hv);
2406 }
2407
2408 return 1;
2409}
2410
2411/*****************************************************************************/
2412/* async pool handler */
2413
2414static int
2415slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2416{
2417 HV *hv = (HV *)SvRV (coro_current);
2418 struct coro *coro = (struct coro *)frame->data;
2419
2420 if (!coro->invoke_cb)
2421 return 1; /* loop till we have invoke */
2422 else
2423 {
2424 hv_store (hv, "desc", sizeof ("desc") - 1,
2425 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2426
2427 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2428
2429 {
2430 dSP;
2431 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2432 PUTBACK;
2433 }
2434
2435 SvREFCNT_dec (GvAV (PL_defgv));
2436 GvAV (PL_defgv) = coro->invoke_av;
2437 coro->invoke_av = 0;
2438
2439 return 0;
2440 }
2441}
2442
2443static void
2444slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2445{
2446 HV *hv = (HV *)SvRV (coro_current);
2447 struct coro *coro = SvSTATE_hv ((SV *)hv);
2448
2449 if (ecb_expect_true (coro->saved_deffh))
2450 {
2451 /* subsequent iteration */
2452 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2453 coro->saved_deffh = 0;
2454
2455 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2456 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2457 {
2458 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2459 return;
2460 }
2461 else
2462 {
2463 av_clear (GvAV (PL_defgv));
2464 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2465
2466 if (ecb_expect_false (coro->swap_sv))
2467 {
2468 swap_svs_leave (coro);
2469 SvREFCNT_dec_NN (coro->swap_sv);
2470 coro->swap_sv = 0;
2471 }
2472
2473 coro->prio = 0;
2474
2475 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2476 api_trace (aTHX_ coro_current, 0);
2477
2478 frame->prepare = prepare_schedule;
2479 av_push (av_async_pool, SvREFCNT_inc (hv));
2480 }
2481 }
2482 else
2483 {
2484 /* first iteration, simply fall through */
2485 frame->prepare = prepare_nop;
2486 }
2487
2488 frame->check = slf_check_pool_handler;
2489 frame->data = (void *)coro;
2490}
2491
2492/*****************************************************************************/
2493/* rouse callback */
2494
2495#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2496
2497static void
2498coro_rouse_callback (pTHX_ CV *cv)
2499{
2500 dXSARGS;
2501 SV *data = (SV *)S_GENSUB_ARG;
2502
2503 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2504 {
2505 /* first call, set args */
2506 SV *coro = SvRV (data);
2507 AV *av = newAV ();
2508
2509 SvRV_set (data, (SV *)av);
2510
2511 /* better take a full copy of the arguments */
2512 while (items--)
2513 av_store (av, items, newSVsv (ST (items)));
2514
2515 api_ready (aTHX_ coro);
2516 SvREFCNT_dec (coro);
2517 }
2518
2519 XSRETURN_EMPTY;
2520}
2521
2522static int
2523slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2524{
2525 SV *data = (SV *)frame->data;
2526
2527 if (CORO_THROW)
2528 return 0;
2529
2530 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2531 return 1;
2532
2533 /* now push all results on the stack */
2534 {
2535 dSP;
2536 AV *av = (AV *)SvRV (data);
2537 int i;
2538
2539 EXTEND (SP, AvFILLp (av) + 1);
2540 for (i = 0; i <= AvFILLp (av); ++i)
2541 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2542
2543 /* we have stolen the elements, so set length to zero and free */
2544 AvFILLp (av) = -1;
2545 av_undef (av);
2546
2547 PUTBACK;
2548 }
2549
2550 return 0;
2551}
2552
2553static void
2554slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2555{
2556 SV *cb;
2557
2558 if (items)
2559 cb = arg [0];
2560 else
2561 {
2562 struct coro *coro = SvSTATE_current;
2563
2564 if (!coro->rouse_cb)
2565 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2566
2567 cb = sv_2mortal (coro->rouse_cb);
2568 coro->rouse_cb = 0;
2569 }
2570
2571 if (!SvROK (cb)
2572 || SvTYPE (SvRV (cb)) != SVt_PVCV
2573 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2574 croak ("Coro::rouse_wait called with illegal callback argument,");
2575
2576 {
2577 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2578 SV *data = (SV *)S_GENSUB_ARG;
2579
2580 frame->data = (void *)data;
2581 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2582 frame->check = slf_check_rouse_wait;
2583 }
2584}
2585
2586static SV *
2587coro_new_rouse_cb (pTHX)
2588{
2589 HV *hv = (HV *)SvRV (coro_current);
2590 struct coro *coro = SvSTATE_hv (hv);
2591 SV *data = newRV_inc ((SV *)hv);
2592 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2593
2594 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2595 SvREFCNT_dec (data); /* magicext increases the refcount */
2596
2597 SvREFCNT_dec (coro->rouse_cb);
2598 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2599
2600 return cb;
2601}
2602
2603/*****************************************************************************/
2604/* schedule-like-function opcode (SLF) */
2605
2606static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2607static const CV *slf_cv;
2608static SV **slf_argv;
2609static int slf_argc, slf_arga; /* count, allocated */
2610static I32 slf_ax; /* top of stack, for restore */
2611
2612/* this restores the stack in the case we patched the entersub, to */
2613/* recreate the stack frame as perl will on following calls */
2614/* since entersub cleared the stack */
2615static OP *
2616pp_restore (pTHX)
2617{
2618 int i;
2619 SV **SP = PL_stack_base + slf_ax;
2620
2621 PUSHMARK (SP);
2622
2623 EXTEND (SP, slf_argc + 1);
2624
2625 for (i = 0; i < slf_argc; ++i)
2626 PUSHs (sv_2mortal (slf_argv [i]));
2627
2628 PUSHs ((SV *)CvGV (slf_cv));
2629
2630 RETURNOP (slf_restore.op_first);
2631}
2632
2633static void
2634slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2635{
2636 SV **arg = (SV **)slf_frame.data;
2637
2638 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2639}
2640
2641static void
2642slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2643{
2644 if (items != 2)
2645 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2646
2647 frame->prepare = slf_prepare_transfer;
2648 frame->check = slf_check_nop;
2649 frame->data = (void *)arg; /* let's hope it will stay valid */
2650}
2651
2652static void
2653slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2654{
2655 frame->prepare = prepare_schedule;
2656 frame->check = slf_check_nop;
2657}
2658
2659static void
2660slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2661{
2662 struct coro *next = (struct coro *)slf_frame.data;
2663
2664 SvREFCNT_inc_NN (next->hv);
2665 prepare_schedule_to (aTHX_ ta, next);
2666}
2667
2668static void
2669slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2670{
2671 if (!items)
2672 croak ("Coro::schedule_to expects a coroutine argument, caught");
2673
2674 frame->data = (void *)SvSTATE (arg [0]);
2675 frame->prepare = slf_prepare_schedule_to;
2676 frame->check = slf_check_nop;
2677}
2678
2679static void
2680slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2681{
2682 api_ready (aTHX_ SvRV (coro_current));
2683
2684 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2685}
2686
2687static void
2688slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2689{
2690 frame->prepare = prepare_cede;
2691 frame->check = slf_check_nop;
2692}
2693
2694static void
2695slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2696{
2697 frame->prepare = prepare_cede_notself;
2698 frame->check = slf_check_nop;
2699}
2700
2701/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2702static void
2703slf_destroy (pTHX_ struct coro *coro)
2704{
2705 struct CoroSLF frame = coro->slf_frame;
2706
2707 /*
2708 * The on_destroy below most likely is from an SLF call.
2709 * Since by definition the SLF call will not finish when we destroy
2710 * the coro, we will have to force-finish it here, otherwise
2711 * cleanup functions cannot call SLF functions.
2712 */
2713 coro->slf_frame.prepare = 0;
2714
2715 /* this callback is reserved for slf functions needing to do cleanup */
2716 if (frame.destroy && frame.prepare && !PL_dirty)
2717 frame.destroy (aTHX_ &frame);
2718}
2719
2720/*
2721 * these not obviously related functions are all rolled into one
2722 * function to increase chances that they all will call transfer with the same
2723 * stack offset
2724 * SLF stands for "schedule-like-function".
2725 */
2726static OP *
2727pp_slf (pTHX)
2728{
2729 I32 checkmark; /* mark SP to see how many elements check has pushed */
2730
2731 /* set up the slf frame, unless it has already been set-up */
2732 /* the latter happens when a new coro has been started */
2733 /* or when a new cctx was attached to an existing coroutine */
2734 if (ecb_expect_true (!slf_frame.prepare))
2735 {
2736 /* first iteration */
2737 dSP;
2738 SV **arg = PL_stack_base + TOPMARK + 1;
2739 int items = SP - arg; /* args without function object */
2740 SV *gv = *sp;
2741
2742 /* do a quick consistency check on the "function" object, and if it isn't */
2743 /* for us, divert to the real entersub */
2744 if (SvTYPE (gv) != SVt_PVGV
2745 || !GvCV (gv)
2746 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2747 return PL_ppaddr[OP_ENTERSUB](aTHX);
2748
2749 if (!(PL_op->op_flags & OPf_STACKED))
2750 {
2751 /* ampersand-form of call, use @_ instead of stack */
2752 AV *av = GvAV (PL_defgv);
2753 arg = AvARRAY (av);
2754 items = AvFILLp (av) + 1;
2755 }
2756
2757 /* now call the init function, which needs to set up slf_frame */
2758 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2759 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2760
2761 /* pop args */
2762 SP = PL_stack_base + POPMARK;
2763
2764 PUTBACK;
2765 }
2766
2767 /* now that we have a slf_frame, interpret it! */
2768 /* we use a callback system not to make the code needlessly */
2769 /* complicated, but so we can run multiple perl coros from one cctx */
2770
2771 do
2772 {
2773 struct coro_transfer_args ta;
2774
2775 slf_frame.prepare (aTHX_ &ta);
2776 TRANSFER (ta, 0);
2777
2778 checkmark = PL_stack_sp - PL_stack_base;
2779 }
2780 while (slf_frame.check (aTHX_ &slf_frame));
2781
2782 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2783
2784 /* exception handling */
2785 if (ecb_expect_false (CORO_THROW))
2786 {
2787 SV *exception = sv_2mortal (CORO_THROW);
2788
2789 CORO_THROW = 0;
2790 sv_setsv (ERRSV, exception);
2791 croak (0);
2792 }
2793
2794 /* return value handling - mostly like entersub */
2795 /* make sure we put something on the stack in scalar context */
2796 if (GIMME_V == G_SCALAR
2797 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2798 {
2799 dSP;
2800 SV **bot = PL_stack_base + checkmark;
2801
2802 if (sp == bot) /* too few, push undef */
2803 bot [1] = &PL_sv_undef;
2804 else /* too many, take last one */
2805 bot [1] = *sp;
2806
2807 SP = bot + 1;
2808
2809 PUTBACK;
2810 }
2811
2812 return NORMAL;
2813}
2814
2815static void
2816api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2817{
2818 int i;
2819 SV **arg = PL_stack_base + ax;
2820 int items = PL_stack_sp - arg + 1;
2821
2822 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2823
2824 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2825 && PL_op->op_ppaddr != pp_slf)
2826 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2827
2828 CvFLAGS (cv) |= CVf_SLF;
2829 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2830 slf_cv = cv;
2831
2832 /* we patch the op, and then re-run the whole call */
2833 /* we have to put the same argument on the stack for this to work */
2834 /* and this will be done by pp_restore */
2835 slf_restore.op_next = (OP *)&slf_restore;
2836 slf_restore.op_type = OP_CUSTOM;
2837 slf_restore.op_ppaddr = pp_restore;
2838 slf_restore.op_first = PL_op;
2839
2840 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2841
2842 if (PL_op->op_flags & OPf_STACKED)
2843 {
2844 if (items > slf_arga)
2845 {
2846 slf_arga = items;
2847 Safefree (slf_argv);
2848 New (0, slf_argv, slf_arga, SV *);
2849 }
2850
2851 slf_argc = items;
2852
2853 for (i = 0; i < items; ++i)
2854 slf_argv [i] = SvREFCNT_inc (arg [i]);
2855 }
2856 else
2857 slf_argc = 0;
2858
2859 PL_op->op_ppaddr = pp_slf;
2860 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2861
2862 PL_op = (OP *)&slf_restore;
2863}
2864
2865/*****************************************************************************/
2866/* dynamic wind */
2867
2868static void
2869on_enterleave_call (pTHX_ SV *cb)
2870{
2871 dSP;
2872
2873 PUSHSTACK;
2874
2875 PUSHMARK (SP);
2876 PUTBACK;
2877 call_sv (cb, G_VOID | G_DISCARD);
2878 SPAGAIN;
2879
2880 POPSTACK;
2881}
2882
2883static SV *
2884coro_avp_pop_and_free (pTHX_ AV **avp)
2885{
2886 AV *av = *avp;
2887 SV *res = av_pop (av);
2888
2889 if (AvFILLp (av) < 0)
2890 {
2891 *avp = 0;
2892 SvREFCNT_dec (av);
2893 }
2894
2895 return res;
2896}
2897
2898static void
2899coro_pop_on_enter (pTHX_ void *coro)
2900{
2901 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2902 SvREFCNT_dec (cb);
2903}
2904
2905static void
2906coro_pop_on_leave (pTHX_ void *coro)
2907{
2908 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2909 on_enterleave_call (aTHX_ sv_2mortal (cb));
2910}
2911
2912static void
2913enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2914{
2915 if (!hook)
2916 return;
2917
2918 if (!*avp)
2919 {
2920 *avp = newAV ();
2921 AvREAL_off (*avp);
2922 }
2923
2924 av_push (*avp, (SV *)hook);
2925 av_push (*avp, (SV *)arg);
2926}
2927
2928static void
2929enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2930{
2931 AV *av = *avp;
2932 int i;
2933
2934 if (!av)
2935 return;
2936
2937 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2938 if (AvARRAY (av)[i] == (SV *)hook)
2939 {
2940 if (execute)
2941 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2942
2943 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2944 av_pop (av);
2945 av_pop (av);
2946 break;
2947 }
2948
2949 if (AvFILLp (av) >= 0)
2950 {
2951 *avp = 0;
2952 SvREFCNT_dec_NN (av);
2953 }
2954}
2955
2956static void
2957api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2958{
2959 struct coro *coro = SvSTATE (coro_sv);
2960
2961 if (SvSTATE_current == coro)
2962 if (enter)
2963 enter (aTHX_ enter_arg);
2964
2965 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2966 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2967}
2968
2969static void
2970api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2971{
2972 struct coro *coro = SvSTATE (coro_sv);
2973
2974 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2975 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2976}
2977
2978static void
2979savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2980{
2981 struct coro *coro = SvSTATE_current;
2982
2983 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2984}
2985
2986static void
2987savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2988{
2989 struct coro *coro = SvSTATE_current;
2990
2991 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2992}
2993
2994static void
2995api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2996{
2997 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2998
2999 /* this ought to be much cheaper than malloc + a single destructor call */
3000 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
3001 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
3002}
1653 3003
1654/*****************************************************************************/ 3004/*****************************************************************************/
1655/* PerlIO::cede */ 3005/* PerlIO::cede */
1656 3006
1657typedef struct 3007typedef struct
1658{ 3008{
1659 PerlIOBuf base; 3009 PerlIOBuf base;
1660 NV next, every; 3010 NV next, every;
1661} PerlIOCede; 3011} PerlIOCede;
1662 3012
1663static IV 3013static IV ecb_cold
1664PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab) 3014PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1665{ 3015{
1666 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 3016 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1667 3017
1668 self->every = SvCUR (arg) ? SvNV (arg) : 0.01; 3018 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1669 self->next = nvtime () + self->every; 3019 self->next = nvtime () + self->every;
1670 3020
1671 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab); 3021 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1672} 3022}
1673 3023
1674static SV * 3024static SV * ecb_cold
1675PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags) 3025PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1676{ 3026{
1677 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 3027 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1678 3028
1679 return newSVnv (self->every); 3029 return newSVnv (self->every);
… …
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 3035 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686 double now = nvtime (); 3036 double now = nvtime ();
1687 3037
1688 if (now >= self->next) 3038 if (now >= self->next)
1689 { 3039 {
1690 api_cede (); 3040 api_cede (aTHX);
1691 self->next = now + self->every; 3041 self->next = now + self->every;
1692 } 3042 }
1693 3043
1694 return PerlIOBuf_flush (aTHX_ f); 3044 return PerlIOBuf_flush (aTHX_ f);
1695} 3045}
… …
1724 PerlIOBuf_get_ptr, 3074 PerlIOBuf_get_ptr,
1725 PerlIOBuf_get_cnt, 3075 PerlIOBuf_get_cnt,
1726 PerlIOBuf_set_ptrcnt, 3076 PerlIOBuf_set_ptrcnt,
1727}; 3077};
1728 3078
3079/*****************************************************************************/
3080/* Coro::Semaphore & Coro::Signal */
3081
3082static SV *
3083coro_waitarray_new (pTHX_ int count)
3084{
3085 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3086 AV *av = newAV ();
3087 SV **ary;
3088
3089 /* unfortunately, building manually saves memory */
3090 Newx (ary, 2, SV *);
3091 AvALLOC (av) = ary;
3092#if PERL_VERSION_ATLEAST (5,10,0)
3093 AvARRAY (av) = ary;
3094#else
3095 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3096 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3097 SvPVX ((SV *)av) = (char *)ary;
3098#endif
3099 AvMAX (av) = 1;
3100 AvFILLp (av) = 0;
3101 ary [0] = newSViv (count);
3102
3103 return newRV_noinc ((SV *)av);
3104}
3105
3106/* semaphore */
3107
3108static void
3109coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3110{
3111 SV *count_sv = AvARRAY (av)[0];
3112 IV count = SvIVX (count_sv);
3113
3114 count += adjust;
3115 SvIVX (count_sv) = count;
3116
3117 /* now wake up as many waiters as are expected to lock */
3118 while (count > 0 && AvFILLp (av) > 0)
3119 {
3120 SV *cb;
3121
3122 /* swap first two elements so we can shift a waiter */
3123 AvARRAY (av)[0] = AvARRAY (av)[1];
3124 AvARRAY (av)[1] = count_sv;
3125 cb = av_shift (av);
3126
3127 if (SvOBJECT (cb))
3128 {
3129 api_ready (aTHX_ cb);
3130 --count;
3131 }
3132 else if (SvTYPE (cb) == SVt_PVCV)
3133 {
3134 dSP;
3135 PUSHMARK (SP);
3136 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3137 PUTBACK;
3138 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3139 }
3140
3141 SvREFCNT_dec_NN (cb);
3142 }
3143}
3144
3145static void
3146coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3147{
3148 /* call $sem->adjust (0) to possibly wake up some other waiters */
3149 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3150}
3151
3152static int
3153slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3154{
3155 AV *av = (AV *)frame->data;
3156 SV *count_sv = AvARRAY (av)[0];
3157 SV *coro_hv = SvRV (coro_current);
3158
3159 frame->destroy = 0;
3160
3161 /* if we are about to throw, don't actually acquire the lock, just throw */
3162 if (ecb_expect_false (CORO_THROW))
3163 {
3164 /* we still might be responsible for the semaphore, so wake up others */
3165 coro_semaphore_adjust (aTHX_ av, 0);
3166
3167 return 0;
3168 }
3169 else if (SvIVX (count_sv) > 0)
3170 {
3171 if (acquire)
3172 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3173 else
3174 coro_semaphore_adjust (aTHX_ av, 0);
3175
3176 return 0;
3177 }
3178 else
3179 {
3180 int i;
3181 /* if we were woken up but can't down, we look through the whole */
3182 /* waiters list and only add us if we aren't in there already */
3183 /* this avoids some degenerate memory usage cases */
3184 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3185 if (AvARRAY (av)[i] == coro_hv)
3186 return 1;
3187
3188 av_push (av, SvREFCNT_inc (coro_hv));
3189 return 1;
3190 }
3191}
3192
3193static int
3194slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3195{
3196 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3197}
3198
3199static int
3200slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3201{
3202 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3203}
3204
3205static void
3206slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3207{
3208 AV *av = (AV *)SvRV (arg [0]);
3209
3210 if (SvIVX (AvARRAY (av)[0]) > 0)
3211 {
3212 frame->data = (void *)av;
3213 frame->prepare = prepare_nop;
3214 }
3215 else
3216 {
3217 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3218
3219 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3220 frame->prepare = prepare_schedule;
3221 /* to avoid race conditions when a woken-up coro gets terminated */
3222 /* we arrange for a temporary on_destroy that calls adjust (0) */
3223 frame->destroy = coro_semaphore_destroy;
3224 }
3225}
3226
3227static void
3228slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3229{
3230 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3231 frame->check = slf_check_semaphore_down;
3232}
3233
3234static void
3235slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3236{
3237 if (items >= 2)
3238 {
3239 /* callback form */
3240 AV *av = (AV *)SvRV (arg [0]);
3241 SV *cb_cv = s_get_cv_croak (arg [1]);
3242
3243 av_push (av, SvREFCNT_inc_NN (cb_cv));
3244
3245 if (SvIVX (AvARRAY (av)[0]) > 0)
3246 coro_semaphore_adjust (aTHX_ av, 0);
3247
3248 frame->prepare = prepare_nop;
3249 frame->check = slf_check_nop;
3250 }
3251 else
3252 {
3253 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3254 frame->check = slf_check_semaphore_wait;
3255 }
3256}
3257
3258/* signal */
3259
3260static void
3261coro_signal_wake (pTHX_ AV *av, int count)
3262{
3263 SvIVX (AvARRAY (av)[0]) = 0;
3264
3265 /* now signal count waiters */
3266 while (count > 0 && AvFILLp (av) > 0)
3267 {
3268 SV *cb;
3269
3270 /* swap first two elements so we can shift a waiter */
3271 cb = AvARRAY (av)[0];
3272 AvARRAY (av)[0] = AvARRAY (av)[1];
3273 AvARRAY (av)[1] = cb;
3274
3275 cb = av_shift (av);
3276
3277 if (SvTYPE (cb) == SVt_PVCV)
3278 {
3279 dSP;
3280 PUSHMARK (SP);
3281 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3282 PUTBACK;
3283 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3284 }
3285 else
3286 {
3287 api_ready (aTHX_ cb);
3288 sv_setiv (cb, 0); /* signal waiter */
3289 }
3290
3291 SvREFCNT_dec_NN (cb);
3292
3293 --count;
3294 }
3295}
3296
3297static int
3298slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3299{
3300 /* if we are about to throw, also stop waiting */
3301 return SvROK ((SV *)frame->data) && !CORO_THROW;
3302}
3303
3304static void
3305slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3306{
3307 AV *av = (AV *)SvRV (arg [0]);
3308
3309 if (items >= 2)
3310 {
3311 SV *cb_cv = s_get_cv_croak (arg [1]);
3312 av_push (av, SvREFCNT_inc_NN (cb_cv));
3313
3314 if (SvIVX (AvARRAY (av)[0]))
3315 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3316
3317 frame->prepare = prepare_nop;
3318 frame->check = slf_check_nop;
3319 }
3320 else if (SvIVX (AvARRAY (av)[0]))
3321 {
3322 SvIVX (AvARRAY (av)[0]) = 0;
3323 frame->prepare = prepare_nop;
3324 frame->check = slf_check_nop;
3325 }
3326 else
3327 {
3328 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3329
3330 av_push (av, waiter);
3331
3332 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3333 frame->prepare = prepare_schedule;
3334 frame->check = slf_check_signal_wait;
3335 }
3336}
3337
3338/*****************************************************************************/
3339/* Coro::AIO */
3340
3341#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3342
3343/* helper storage struct */
3344struct io_state
3345{
3346 int errorno;
3347 I32 laststype; /* U16 in 5.10.0 */
3348 int laststatval;
3349 Stat_t statcache;
3350};
3351
3352static void
3353coro_aio_callback (pTHX_ CV *cv)
3354{
3355 dXSARGS;
3356 AV *state = (AV *)S_GENSUB_ARG;
3357 SV *coro = av_pop (state);
3358 SV *data_sv = newSV (sizeof (struct io_state));
3359
3360 av_extend (state, items - 1);
3361
3362 sv_upgrade (data_sv, SVt_PV);
3363 SvCUR_set (data_sv, sizeof (struct io_state));
3364 SvPOK_only (data_sv);
3365
3366 {
3367 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3368
3369 data->errorno = errno;
3370 data->laststype = PL_laststype;
3371 data->laststatval = PL_laststatval;
3372 data->statcache = PL_statcache;
3373 }
3374
3375 /* now build the result vector out of all the parameters and the data_sv */
3376 {
3377 int i;
3378
3379 for (i = 0; i < items; ++i)
3380 av_push (state, SvREFCNT_inc_NN (ST (i)));
3381 }
3382
3383 av_push (state, data_sv);
3384
3385 api_ready (aTHX_ coro);
3386 SvREFCNT_dec_NN (coro);
3387 SvREFCNT_dec_NN ((AV *)state);
3388}
3389
3390static int
3391slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3392{
3393 AV *state = (AV *)frame->data;
3394
3395 /* if we are about to throw, return early */
3396 /* this does not cancel the aio request, but at least */
3397 /* it quickly returns */
3398 if (CORO_THROW)
3399 return 0;
3400
3401 /* one element that is an RV? repeat! */
3402 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3403 return 1;
3404
3405 /* restore status */
3406 {
3407 SV *data_sv = av_pop (state);
3408 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3409
3410 errno = data->errorno;
3411 PL_laststype = data->laststype;
3412 PL_laststatval = data->laststatval;
3413 PL_statcache = data->statcache;
3414
3415 SvREFCNT_dec_NN (data_sv);
3416 }
3417
3418 /* push result values */
3419 {
3420 dSP;
3421 int i;
3422
3423 EXTEND (SP, AvFILLp (state) + 1);
3424 for (i = 0; i <= AvFILLp (state); ++i)
3425 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3426
3427 PUTBACK;
3428 }
3429
3430 return 0;
3431}
3432
3433static void
3434slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3435{
3436 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3437 SV *coro_hv = SvRV (coro_current);
3438 struct coro *coro = SvSTATE_hv (coro_hv);
3439
3440 /* put our coroutine id on the state arg */
3441 av_push (state, SvREFCNT_inc_NN (coro_hv));
3442
3443 /* first see whether we have a non-zero priority and set it as AIO prio */
3444 if (coro->prio)
3445 {
3446 dSP;
3447
3448 static SV *prio_cv;
3449 static SV *prio_sv;
3450
3451 if (ecb_expect_false (!prio_cv))
3452 {
3453 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3454 prio_sv = newSViv (0);
3455 }
3456
3457 PUSHMARK (SP);
3458 sv_setiv (prio_sv, coro->prio);
3459 XPUSHs (prio_sv);
3460
3461 PUTBACK;
3462 call_sv (prio_cv, G_VOID | G_DISCARD);
3463 }
3464
3465 /* now call the original request */
3466 {
3467 dSP;
3468 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3469 int i;
3470
3471 PUSHMARK (SP);
3472
3473 /* first push all args to the stack */
3474 EXTEND (SP, items + 1);
3475
3476 for (i = 0; i < items; ++i)
3477 PUSHs (arg [i]);
3478
3479 /* now push the callback closure */
3480 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3481
3482 /* now call the AIO function - we assume our request is uncancelable */
3483 PUTBACK;
3484 call_sv ((SV *)req, G_VOID | G_DISCARD);
3485 }
3486
3487 /* now that the request is going, we loop till we have a result */
3488 frame->data = (void *)state;
3489 frame->prepare = prepare_schedule;
3490 frame->check = slf_check_aio_req;
3491}
3492
3493static void
3494coro_aio_req_xs (pTHX_ CV *cv)
3495{
3496 dXSARGS;
3497
3498 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3499
3500 XSRETURN_EMPTY;
3501}
3502
3503/*****************************************************************************/
3504
3505#if CORO_CLONE
3506# include "clone.c"
3507#endif
3508
3509/*****************************************************************************/
3510
3511static SV *
3512coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3513{
3514 SV *coro_sv;
3515 struct coro *coro;
3516 MAGIC *mg;
3517 HV *hv;
3518 SV *cb;
3519 int i;
3520
3521 if (argc > 0)
3522 {
3523 cb = s_get_cv_croak (argv [0]);
3524
3525 if (!is_coro)
3526 {
3527 if (CvISXSUB (cb))
3528 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3529
3530 if (!CvROOT (cb))
3531 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3532 }
3533 }
3534
3535 Newz (0, coro, 1, struct coro);
3536 coro->args = newAV ();
3537 coro->flags = CF_NEW;
3538
3539 if (coro_first) coro_first->prev = coro;
3540 coro->next = coro_first;
3541 coro_first = coro;
3542
3543 coro->hv = hv = newHV ();
3544 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3545 mg->mg_flags |= MGf_DUP;
3546 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3547
3548 if (argc > 0)
3549 {
3550 av_extend (coro->args, argc + is_coro - 1);
3551
3552 if (is_coro)
3553 {
3554 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3555 cb = (SV *)cv_coro_run;
3556 }
3557
3558 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3559
3560 for (i = 1; i < argc; i++)
3561 av_push (coro->args, newSVsv (argv [i]));
3562 }
3563
3564 return coro_sv;
3565}
3566
3567#ifndef __cplusplus
3568ecb_cold XS(boot_Coro__State);
3569#endif
3570
3571#if CORO_JIT
3572
3573static void ecb_noinline ecb_cold
3574pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3575{
3576 dSP;
3577 AV *av = newAV ();
3578
3579 av_store (av, 3, newSVuv (d));
3580 av_store (av, 2, newSVuv (c));
3581 av_store (av, 1, newSVuv (b));
3582 av_store (av, 0, newSVuv (a));
3583
3584 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3585
3586 PUTBACK;
3587}
3588
3589static void ecb_noinline ecb_cold
3590jit_init (pTHX)
3591{
3592 dSP;
3593 SV *load, *save;
3594 char *map_base;
3595 char *load_ptr, *save_ptr;
3596 STRLEN load_len, save_len, map_len;
3597 int count;
3598
3599 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3600
3601 PUSHMARK (SP);
3602 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3603 #include "state.h"
3604 count = call_pv ("Coro::State::_jit", G_ARRAY);
3605 SPAGAIN;
3606
3607 save = POPs; save_ptr = SvPVbyte (save, save_len);
3608 load = POPs; load_ptr = SvPVbyte (load, load_len);
3609
3610 map_len = load_len + save_len + 16;
3611
3612 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3613
3614 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3615
3616 load_perl_slots = (load_save_perl_slots_type)map_base;
3617 memcpy (map_base, load_ptr, load_len);
3618
3619 map_base += (load_len + 15) & ~15;
3620
3621 save_perl_slots = (load_save_perl_slots_type)map_base;
3622 memcpy (map_base, save_ptr, save_len);
3623
3624 /* we are good citizens and try to make the page read-only, so the evil evil */
3625 /* hackers might have it a bit more difficult */
3626 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3627
3628 PUTBACK;
3629 eval_pv ("undef &Coro::State::_jit", 1);
3630}
3631
3632#endif
1729 3633
1730MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3634MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1731 3635
1732PROTOTYPES: DISABLE 3636PROTOTYPES: DISABLE
1733 3637
1734BOOT: 3638BOOT:
1735{ 3639{
3640#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3641#include "state.h"
1736#ifdef USE_ITHREADS 3642#ifdef USE_ITHREADS
1737 MUTEX_INIT (&coro_mutex); 3643# if CORO_PTHREAD
3644 coro_thx = PERL_GET_CONTEXT;
1738#endif 3645# endif
1739 BOOT_PAGESIZE; 3646#endif
3647 /* perl defines these to check for existance first, but why it doesn't */
3648 /* just create them one at init time is not clear to me, except for */
3649 /* programs trying to delete them, but... */
3650 /* anyway, we declare this as invalid and make sure they are initialised here */
3651 DEFSV;
3652 ERRSV;
3653
3654 cctx_current = cctx_new_empty ();
1740 3655
1741 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3656 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1742 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3657 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1743 3658
1744 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3659 {
1745 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3660 /*
1746 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr; 3661 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3662 * by coro_sig_vtbl in hash values.
3663 */
3664 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3665
3666 /* this only works if perl doesn't have a vtbl for %SIG */
3667 assert (!mg->mg_virtual);
3668
3669 /*
3670 * The irony is that the perl API itself asserts that mg_virtual
3671 * must be non-const, yet perl5porters insisted on marking their
3672 * vtbls as read-only, just to thwart perl modules from patching
3673 * them.
3674 */
3675 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3676 mg->mg_flags |= MGf_COPY;
3677
3678 coro_sigelem_vtbl = PL_vtbl_sigelem;
3679 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3680 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3681 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3682 }
1747 3683
1748 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1749 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3684 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1750 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3685 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1751 3686
1752 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3687 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1753 3688
… …
1760 main_top_env = PL_top_env; 3695 main_top_env = PL_top_env;
1761 3696
1762 while (main_top_env->je_prev) 3697 while (main_top_env->je_prev)
1763 main_top_env = main_top_env->je_prev; 3698 main_top_env = main_top_env->je_prev;
1764 3699
1765 coroapi.ver = CORO_API_VERSION;
1766 coroapi.rev = CORO_API_REVISION;
1767 coroapi.transfer = api_transfer;
1768
1769 { 3700 {
1770 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3701 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
1771 3702
1772 if (!svp) croak ("Time::HiRes is required"); 3703 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
1773 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3704 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
1774 3705
1775 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3706 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3707 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
1776 } 3708 }
1777 3709
3710 coroapi.ver = CORO_API_VERSION;
3711 coroapi.rev = CORO_API_REVISION;
3712
3713 coroapi.transfer = api_transfer;
3714
3715 coroapi.sv_state = SvSTATE_;
3716 coroapi.execute_slf = api_execute_slf;
3717 coroapi.prepare_nop = prepare_nop;
3718 coroapi.prepare_schedule = prepare_schedule;
3719 coroapi.prepare_cede = prepare_cede;
3720 coroapi.prepare_cede_notself = prepare_cede_notself;
3721
3722 time_init (aTHX);
3723
1778 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3724 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3725#if CORO_JIT
3726 PUTBACK;
3727 jit_init (aTHX);
3728 SPAGAIN;
3729#endif
1779} 3730}
1780 3731
1781SV * 3732SV *
1782new (char *klass, ...) 3733new (SV *klass, ...)
3734 ALIAS:
3735 Coro::new = 1
1783 CODE: 3736 CODE:
1784{ 3737 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1785 struct coro *coro;
1786 MAGIC *mg;
1787 HV *hv;
1788 int i;
1789
1790 Newz (0, coro, 1, struct coro);
1791 coro->args = newAV ();
1792 coro->flags = CF_NEW;
1793
1794 if (coro_first) coro_first->prev = coro;
1795 coro->next = coro_first;
1796 coro_first = coro;
1797
1798 coro->hv = hv = newHV ();
1799 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1800 mg->mg_flags |= MGf_DUP;
1801 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1802
1803 av_extend (coro->args, items - 1);
1804 for (i = 1; i < items; i++)
1805 av_push (coro->args, newSVsv (ST (i)));
1806}
1807 OUTPUT:
1808 RETVAL
1809
1810# these not obviously related functions are all rolled into the same xs
1811# function to increase chances that they all will call transfer with the same
1812# stack offset
1813void
1814_set_stacklevel (...)
1815 ALIAS:
1816 Coro::State::transfer = 1
1817 Coro::schedule = 2
1818 Coro::cede = 3
1819 Coro::cede_notself = 4
1820 CODE:
1821{
1822 struct transfer_args ta;
1823
1824 PUTBACK;
1825 switch (ix)
1826 {
1827 case 0:
1828 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1829 ta.next = 0;
1830 break;
1831
1832 case 1:
1833 if (items != 2)
1834 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1835
1836 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1837 break;
1838
1839 case 2:
1840 prepare_schedule (aTHX_ &ta);
1841 break;
1842
1843 case 3:
1844 prepare_cede (aTHX_ &ta);
1845 break;
1846
1847 case 4:
1848 if (!prepare_cede_notself (aTHX_ &ta))
1849 XSRETURN_EMPTY;
1850
1851 break;
1852 }
1853 SPAGAIN;
1854
1855 BARRIER;
1856 PUTBACK;
1857 TRANSFER (ta, 0);
1858 SPAGAIN; /* might be the sp of a different coroutine now */
1859 /* be extra careful not to ever do anything after TRANSFER */
1860}
1861
1862bool
1863_destroy (SV *coro_sv)
1864 CODE:
1865 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1866 OUTPUT: 3738 OUTPUT:
1867 RETVAL 3739 RETVAL
1868 3740
1869void 3741void
1870_exit (int code) 3742transfer (...)
1871 PROTOTYPE: $ 3743 PROTOTYPE: $$
1872 CODE: 3744 CODE:
1873 _exit (code); 3745 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3746
3747SV *
3748clone (Coro::State coro)
3749 CODE:
3750{
3751#if CORO_CLONE
3752 struct coro *ncoro = coro_clone (aTHX_ coro);
3753 MAGIC *mg;
3754 /* TODO: too much duplication */
3755 ncoro->hv = newHV ();
3756 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3757 mg->mg_flags |= MGf_DUP;
3758 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3759#else
3760 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3761#endif
3762}
3763 OUTPUT:
3764 RETVAL
1874 3765
1875int 3766int
1876cctx_stacksize (int new_stacksize = 0) 3767cctx_stacksize (int new_stacksize = 0)
3768 PROTOTYPE: ;$
1877 CODE: 3769 CODE:
1878 RETVAL = coro_stacksize; 3770 RETVAL = cctx_stacksize;
1879 if (new_stacksize) 3771 if (new_stacksize)
3772 {
1880 coro_stacksize = new_stacksize; 3773 cctx_stacksize = new_stacksize;
3774 ++cctx_gen;
3775 }
1881 OUTPUT: 3776 OUTPUT:
1882 RETVAL 3777 RETVAL
1883 3778
1884int 3779int
3780cctx_max_idle (int max_idle = 0)
3781 PROTOTYPE: ;$
3782 CODE:
3783 RETVAL = cctx_max_idle;
3784 if (max_idle > 1)
3785 cctx_max_idle = max_idle;
3786 OUTPUT:
3787 RETVAL
3788
3789int
1885cctx_count () 3790cctx_count ()
3791 PROTOTYPE:
1886 CODE: 3792 CODE:
1887 RETVAL = cctx_count; 3793 RETVAL = cctx_count;
1888 OUTPUT: 3794 OUTPUT:
1889 RETVAL 3795 RETVAL
1890 3796
1891int 3797int
1892cctx_idle () 3798cctx_idle ()
3799 PROTOTYPE:
1893 CODE: 3800 CODE:
1894 RETVAL = cctx_idle; 3801 RETVAL = cctx_idle;
1895 OUTPUT: 3802 OUTPUT:
1896 RETVAL 3803 RETVAL
1897 3804
1898void 3805void
1899list () 3806list ()
3807 PROTOTYPE:
1900 PPCODE: 3808 PPCODE:
1901{ 3809{
1902 struct coro *coro; 3810 struct coro *coro;
1903 for (coro = coro_first; coro; coro = coro->next) 3811 for (coro = coro_first; coro; coro = coro->next)
1904 if (coro->hv) 3812 if (coro->hv)
1905 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3813 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1906} 3814}
1907 3815
… …
1911 eval = 1 3819 eval = 1
1912 CODE: 3820 CODE:
1913{ 3821{
1914 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3822 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1915 { 3823 {
1916 struct coro temp; 3824 struct coro *current = SvSTATE_current;
3825 struct CoroSLF slf_save;
1917 3826
1918 if (!(coro->flags & CF_RUNNING)) 3827 if (current != coro)
1919 { 3828 {
1920 PUTBACK; 3829 PUTBACK;
1921 save_perl (aTHX_ &temp); 3830 save_perl (aTHX_ current);
1922 load_perl (aTHX_ coro); 3831 load_perl (aTHX_ coro);
3832 /* the coro is most likely in an active SLF call.
3833 * while not strictly required (the code we execute is
3834 * not allowed to call any SLF functions), it's cleaner
3835 * to reinitialise the slf_frame and restore it later.
3836 * This might one day allow us to actually do SLF calls
3837 * from code executed here.
3838 */
3839 slf_save = slf_frame;
3840 slf_frame.prepare = 0;
3841 SPAGAIN;
1923 } 3842 }
1924 3843
1925 {
1926 dSP;
1927 ENTER;
1928 SAVETMPS;
1929 PUTBACK;
1930 PUSHSTACK; 3844 PUSHSTACK;
3845
1931 PUSHMARK (SP); 3846 PUSHMARK (SP);
3847 PUTBACK;
1932 3848
1933 if (ix) 3849 if (ix)
1934 eval_sv (coderef, 0); 3850 eval_sv (coderef, 0);
1935 else 3851 else
1936 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3852 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1937 3853
1938 POPSTACK; 3854 POPSTACK;
1939 SPAGAIN; 3855 SPAGAIN;
1940 FREETMPS;
1941 LEAVE;
1942 PUTBACK;
1943 }
1944 3856
1945 if (!(coro->flags & CF_RUNNING)) 3857 if (current != coro)
1946 { 3858 {
3859 PUTBACK;
3860 slf_frame = slf_save;
1947 save_perl (aTHX_ coro); 3861 save_perl (aTHX_ coro);
1948 load_perl (aTHX_ &temp); 3862 load_perl (aTHX_ current);
1949 SPAGAIN; 3863 SPAGAIN;
1950 } 3864 }
1951 } 3865 }
1952} 3866}
1953 3867
… …
1956 PROTOTYPE: $ 3870 PROTOTYPE: $
1957 ALIAS: 3871 ALIAS:
1958 is_ready = CF_READY 3872 is_ready = CF_READY
1959 is_running = CF_RUNNING 3873 is_running = CF_RUNNING
1960 is_new = CF_NEW 3874 is_new = CF_NEW
1961 is_destroyed = CF_DESTROYED 3875 is_destroyed = CF_ZOMBIE
3876 is_zombie = CF_ZOMBIE
3877 is_suspended = CF_SUSPENDED
1962 CODE: 3878 CODE:
1963 RETVAL = boolSV (coro->flags & ix); 3879 RETVAL = boolSV (coro->flags & ix);
1964 OUTPUT: 3880 OUTPUT:
1965 RETVAL 3881 RETVAL
1966 3882
1967void 3883void
3884throw (SV *self, SV *exception = &PL_sv_undef)
3885 PROTOTYPE: $;$
3886 CODE:
3887{
3888 struct coro *coro = SvSTATE (self);
3889 struct coro *current = SvSTATE_current;
3890 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3891 SvREFCNT_dec (*exceptionp);
3892 SvGETMAGIC (exception);
3893 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3894
3895 api_ready (aTHX_ self);
3896}
3897
3898void
1968api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3899api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3900 PROTOTYPE: $;$
3901 C_ARGS: aTHX_ coro, flags
1969 3902
1970SV * 3903SV *
1971has_cctx (Coro::State coro) 3904has_cctx (Coro::State coro)
1972 PROTOTYPE: $ 3905 PROTOTYPE: $
1973 CODE: 3906 CODE:
1974 RETVAL = boolSV (!!coro->cctx); 3907 /* maybe manage the running flag differently */
3908 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1975 OUTPUT: 3909 OUTPUT:
1976 RETVAL 3910 RETVAL
1977 3911
1978int 3912int
1979is_traced (Coro::State coro) 3913is_traced (Coro::State coro)
… …
1981 CODE: 3915 CODE:
1982 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3916 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983 OUTPUT: 3917 OUTPUT:
1984 RETVAL 3918 RETVAL
1985 3919
1986IV 3920UV
1987rss (Coro::State coro) 3921rss (Coro::State coro)
1988 PROTOTYPE: $ 3922 PROTOTYPE: $
1989 ALIAS: 3923 ALIAS:
1990 usecount = 1 3924 usecount = 1
1991 CODE: 3925 CODE:
… …
1997 OUTPUT: 3931 OUTPUT:
1998 RETVAL 3932 RETVAL
1999 3933
2000void 3934void
2001force_cctx () 3935force_cctx ()
3936 PROTOTYPE:
2002 CODE: 3937 CODE:
2003 struct coro *coro = SvSTATE (coro_current);
2004 coro->cctx->idle_sp = 0; 3938 cctx_current->idle_sp = 0;
2005
2006void
2007throw (Coro::State self, SV *throw = &PL_sv_undef)
2008 PROTOTYPE: $;$
2009 CODE:
2010 SvREFCNT_dec (self->throw);
2011 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2012 3939
2013void 3940void
2014swap_defsv (Coro::State self) 3941swap_defsv (Coro::State self)
2015 PROTOTYPE: $ 3942 PROTOTYPE: $
2016 ALIAS: 3943 ALIAS:
2017 swap_defav = 1 3944 swap_defav = 1
2018 CODE: 3945 CODE:
2019 if (!self->slot) 3946 if (!self->slot)
2020 croak ("cannot swap state with coroutine that has no saved state"); 3947 croak ("cannot swap state with coroutine that has no saved state,");
2021 else 3948 else
2022 { 3949 {
2023 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3950 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3951 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2025 3952
2026 SV *tmp = *src; *src = *dst; *dst = tmp; 3953 SV *tmp = *src; *src = *dst; *dst = tmp;
2027 } 3954 }
2028 3955
3956void
3957cancel (Coro::State self)
3958 CODE:
3959 coro_state_destroy (aTHX_ self);
3960
3961SV *
3962enable_times (int enabled = enable_times)
3963 CODE:
3964{
3965 RETVAL = boolSV (enable_times);
3966
3967 if (enabled != enable_times)
3968 {
3969 enable_times = enabled;
3970
3971 coro_times_update ();
3972 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3973 }
3974}
3975 OUTPUT:
3976 RETVAL
3977
3978void
3979times (Coro::State self)
3980 PPCODE:
3981{
3982 struct coro *current = SvSTATE (coro_current);
3983
3984 if (ecb_expect_false (current == self))
3985 {
3986 coro_times_update ();
3987 coro_times_add (SvSTATE (coro_current));
3988 }
3989
3990 EXTEND (SP, 2);
3991 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3992 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3993
3994 if (ecb_expect_false (current == self))
3995 coro_times_sub (SvSTATE (coro_current));
3996}
3997
3998void
3999swap_sv (Coro::State coro, SV *sva, SV *svb)
4000 CODE:
4001{
4002 struct coro *current = SvSTATE_current;
4003 AV *swap_sv;
4004 int i;
4005
4006 sva = SvRV (sva);
4007 svb = SvRV (svb);
4008
4009 if (current == coro)
4010 SWAP_SVS_LEAVE (current);
4011
4012 if (!coro->swap_sv)
4013 coro->swap_sv = newAV ();
4014
4015 swap_sv = coro->swap_sv;
4016
4017 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
4018 {
4019 SV *a = AvARRAY (swap_sv)[i ];
4020 SV *b = AvARRAY (swap_sv)[i + 1];
4021
4022 if (a == sva && b == svb)
4023 {
4024 SvREFCNT_dec_NN (a);
4025 SvREFCNT_dec_NN (b);
4026
4027 for (; i <= AvFILLp (swap_sv) - 2; i++)
4028 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4029
4030 AvFILLp (swap_sv) -= 2;
4031
4032 goto removed;
4033 }
4034 }
4035
4036 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4037 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4038
4039 removed:
4040
4041 if (current == coro)
4042 SWAP_SVS_ENTER (current);
4043}
4044
4045
2029MODULE = Coro::State PACKAGE = Coro 4046MODULE = Coro::State PACKAGE = Coro
2030 4047
2031BOOT: 4048BOOT:
2032{ 4049{
2033 int i; 4050 if (SVt_LAST > 32)
4051 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
2034 4052
2035 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2036 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 4053 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2037 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 4054 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2038 4055 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
2039 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 4056 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2040 SvREADONLY_on (coro_current); 4057 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4058 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4059 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4060 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4061
4062 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4063 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4064 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4065 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
2041 4066
2042 coro_stash = gv_stashpv ("Coro", TRUE); 4067 coro_stash = gv_stashpv ("Coro", TRUE);
2043 4068
2044 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4069 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2045 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4070 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2046 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4071 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2047 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4072 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2048 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4073 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2049 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4074 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2050
2051 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2052 coro_ready[i] = newAV ();
2053 4075
2054 { 4076 {
2055 SV *sv = perl_get_sv ("Coro::API", TRUE); 4077 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2056 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2057 4078
2058 coroapi.schedule = api_schedule; 4079 coroapi.schedule = api_schedule;
4080 coroapi.schedule_to = api_schedule_to;
2059 coroapi.cede = api_cede; 4081 coroapi.cede = api_cede;
2060 coroapi.cede_notself = api_cede_notself; 4082 coroapi.cede_notself = api_cede_notself;
2061 coroapi.ready = api_ready; 4083 coroapi.ready = api_ready;
2062 coroapi.is_ready = api_is_ready; 4084 coroapi.is_ready = api_is_ready;
2063 coroapi.nready = &coro_nready; 4085 coroapi.nready = coro_nready;
2064 coroapi.current = coro_current; 4086 coroapi.current = coro_current;
2065 4087
4088 coroapi.enterleave_hook = api_enterleave_hook;
4089 coroapi.enterleave_unhook = api_enterleave_unhook;
4090 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4091
2066 GCoroAPI = &coroapi; 4092 /*GCoroAPI = &coroapi;*/
2067 sv_setiv (sv, (IV)&coroapi); 4093 sv_setiv (sv, (IV)&coroapi);
2068 SvREADONLY_on (sv); 4094 SvREADONLY_on (sv);
2069 } 4095 }
2070} 4096}
4097
4098SV *
4099async (...)
4100 PROTOTYPE: &@
4101 CODE:
4102 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4103 api_ready (aTHX_ RETVAL);
4104 OUTPUT:
4105 RETVAL
4106
4107void
4108_destroy (Coro::State coro)
4109 CODE:
4110 /* used by the manager thread */
4111 coro_state_destroy (aTHX_ coro);
4112
4113void
4114on_destroy (Coro::State coro, SV *cb)
4115 CODE:
4116 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4117
4118void
4119join (...)
4120 CODE:
4121 CORO_EXECUTE_SLF_XS (slf_init_join);
4122
4123void
4124terminate (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4127
4128void
4129cancel (...)
4130 CODE:
4131 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4132
4133int
4134safe_cancel (Coro::State self, ...)
4135 C_ARGS: aTHX_ self, &ST (1), items - 1
4136
4137void
4138schedule (...)
4139 CODE:
4140 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4141
4142void
4143schedule_to (...)
4144 CODE:
4145 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4146
4147void
4148cede_to (...)
4149 CODE:
4150 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4151
4152void
4153cede (...)
4154 CODE:
4155 CORO_EXECUTE_SLF_XS (slf_init_cede);
4156
4157void
4158cede_notself (...)
4159 CODE:
4160 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2071 4161
2072void 4162void
2073_set_current (SV *current) 4163_set_current (SV *current)
2074 PROTOTYPE: $ 4164 PROTOTYPE: $
2075 CODE: 4165 CODE:
2076 SvREFCNT_dec (SvRV (coro_current)); 4166 SvREFCNT_dec_NN (SvRV (coro_current));
2077 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current))); 4167 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2078 4168
2079void 4169void
2080_set_readyhook (SV *hook) 4170_set_readyhook (SV *hook)
2081 PROTOTYPE: $ 4171 PROTOTYPE: $
2082 CODE: 4172 CODE:
2083 LOCK;
2084 SvREFCNT_dec (coro_readyhook); 4173 SvREFCNT_dec (coro_readyhook);
4174 SvGETMAGIC (hook);
4175 if (SvOK (hook))
4176 {
2085 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 4177 coro_readyhook = newSVsv (hook);
2086 UNLOCK; 4178 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4179 }
4180 else
4181 {
4182 coro_readyhook = 0;
4183 CORO_READYHOOK = 0;
4184 }
2087 4185
2088int 4186int
2089prio (Coro::State coro, int newprio = 0) 4187prio (Coro::State coro, int newprio = 0)
4188 PROTOTYPE: $;$
2090 ALIAS: 4189 ALIAS:
2091 nice = 1 4190 nice = 1
2092 CODE: 4191 CODE:
2093{ 4192{
2094 RETVAL = coro->prio; 4193 RETVAL = coro->prio;
… …
2096 if (items > 1) 4195 if (items > 1)
2097 { 4196 {
2098 if (ix) 4197 if (ix)
2099 newprio = coro->prio - newprio; 4198 newprio = coro->prio - newprio;
2100 4199
2101 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4200 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2102 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4201 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2103 4202
2104 coro->prio = newprio; 4203 coro->prio = newprio;
2105 } 4204 }
2106} 4205}
2107 OUTPUT: 4206 OUTPUT:
… …
2109 4208
2110SV * 4209SV *
2111ready (SV *self) 4210ready (SV *self)
2112 PROTOTYPE: $ 4211 PROTOTYPE: $
2113 CODE: 4212 CODE:
2114 RETVAL = boolSV (api_ready (self)); 4213 RETVAL = boolSV (api_ready (aTHX_ self));
2115 OUTPUT: 4214 OUTPUT:
2116 RETVAL 4215 RETVAL
2117 4216
2118int 4217int
2119nready (...) 4218nready (...)
… …
2121 CODE: 4220 CODE:
2122 RETVAL = coro_nready; 4221 RETVAL = coro_nready;
2123 OUTPUT: 4222 OUTPUT:
2124 RETVAL 4223 RETVAL
2125 4224
2126# for async_pool speedup
2127void 4225void
2128_pool_1 (SV *cb) 4226suspend (Coro::State self)
4227 PROTOTYPE: $
2129 CODE: 4228 CODE:
2130{ 4229 self->flags |= CF_SUSPENDED;
2131 struct coro *coro = SvSTATE (coro_current);
2132 HV *hv = (HV *)SvRV (coro_current);
2133 AV *defav = GvAV (PL_defgv);
2134 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2135 AV *invoke_av;
2136 int i, len;
2137 4230
2138 if (!invoke) 4231void
4232resume (Coro::State self)
4233 PROTOTYPE: $
4234 CODE:
4235 self->flags &= ~CF_SUSPENDED;
4236
4237void
4238_pool_handler (...)
4239 CODE:
4240 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4241
4242void
4243async_pool (SV *cv, ...)
4244 PROTOTYPE: &@
4245 PPCODE:
4246{
4247 HV *hv = (HV *)av_pop (av_async_pool);
4248 AV *av = newAV ();
4249 SV *cb = ST (0);
4250 int i;
4251
4252 av_extend (av, items - 2);
4253 for (i = 1; i < items; ++i)
4254 av_push (av, SvREFCNT_inc_NN (ST (i)));
4255
4256 if ((SV *)hv == &PL_sv_undef)
2139 { 4257 {
2140 SV *old = PL_diehook; 4258 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2141 PL_diehook = 0; 4259 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2142 SvREFCNT_dec (old); 4260 SvREFCNT_dec_NN (sv);
2143 croak ("\3async_pool terminate\2\n");
2144 } 4261 }
2145 4262
2146 SvREFCNT_dec (coro->saved_deffh);
2147 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2148
2149 hv_store (hv, "desc", sizeof ("desc") - 1,
2150 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2151
2152 invoke_av = (AV *)SvRV (invoke);
2153 len = av_len (invoke_av);
2154
2155 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2156
2157 if (len > 0)
2158 { 4263 {
2159 av_fill (defav, len - 1); 4264 struct coro *coro = SvSTATE_hv (hv);
2160 for (i = 0; i < len; ++i) 4265
2161 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 4266 assert (!coro->invoke_cb);
4267 assert (!coro->invoke_av);
4268 coro->invoke_cb = SvREFCNT_inc (cb);
4269 coro->invoke_av = av;
2162 } 4270 }
2163 4271
4272 api_ready (aTHX_ (SV *)hv);
4273
4274 if (GIMME_V != G_VOID)
4275 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4276 else
2164 SvREFCNT_dec (invoke); 4277 SvREFCNT_dec_NN (hv);
2165} 4278}
2166 4279
2167void 4280SV *
2168_pool_2 (SV *cb) 4281rouse_cb ()
4282 PROTOTYPE:
2169 CODE: 4283 CODE:
2170{ 4284 RETVAL = coro_new_rouse_cb (aTHX);
2171 struct coro *coro = SvSTATE (coro_current);
2172
2173 sv_setsv (cb, &PL_sv_undef);
2174
2175 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2176 coro->saved_deffh = 0;
2177
2178 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2179 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180 {
2181 SV *old = PL_diehook;
2182 PL_diehook = 0;
2183 SvREFCNT_dec (old);
2184 croak ("\3async_pool terminate\2\n");
2185 }
2186
2187 av_clear (GvAV (PL_defgv));
2188 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2189 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190
2191 coro->prio = 0;
2192
2193 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194 api_trace (coro_current, 0);
2195
2196 av_push (av_async_pool, newSVsv (coro_current));
2197}
2198
2199#if 0
2200
2201void
2202_generator_call (...)
2203 PROTOTYPE: @
2204 PPCODE:
2205 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206 xxxx
2207 abort ();
2208
2209SV *
2210gensub (SV *sub, ...)
2211 PROTOTYPE: &;@
2212 CODE:
2213{
2214 struct coro *coro;
2215 MAGIC *mg;
2216 CV *xcv;
2217 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2218 int i;
2219
2220 CvGV (ncv) = CvGV (cv);
2221 CvFILE (ncv) = CvFILE (cv);
2222
2223 Newz (0, coro, 1, struct coro);
2224 coro->args = newAV ();
2225 coro->flags = CF_NEW;
2226
2227 av_extend (coro->args, items - 1);
2228 for (i = 1; i < items; i++)
2229 av_push (coro->args, newSVsv (ST (i)));
2230
2231 CvISXSUB_on (ncv);
2232 CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236 CvXSUB (ncv) = CvXSUB (xcv);
2237 CvANON_on (ncv);
2238
2239 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2240 RETVAL = newRV_noinc ((SV *)ncv);
2241}
2242 OUTPUT: 4285 OUTPUT:
2243 RETVAL 4286 RETVAL
2244 4287
2245#endif
2246
2247
2248MODULE = Coro::State PACKAGE = Coro::AIO
2249
2250void 4288void
2251_get_state (SV *self) 4289rouse_wait (...)
4290 PROTOTYPE: ;$
2252 PPCODE: 4291 PPCODE:
2253{ 4292 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2254 AV *defav = GvAV (PL_defgv);
2255 AV *av = newAV ();
2256 int i;
2257 SV *data_sv = newSV (sizeof (struct io_state));
2258 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2259 SvCUR_set (data_sv, sizeof (struct io_state));
2260 SvPOK_only (data_sv);
2261
2262 data->errorno = errno;
2263 data->laststype = PL_laststype;
2264 data->laststatval = PL_laststatval;
2265 data->statcache = PL_statcache;
2266
2267 av_extend (av, AvFILLp (defav) + 1 + 1);
2268
2269 for (i = 0; i <= AvFILLp (defav); ++i)
2270 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2271
2272 av_push (av, data_sv);
2273
2274 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2275
2276 api_ready (self);
2277}
2278 4293
2279void 4294void
2280_set_state (SV *state) 4295on_enter (SV *block)
4296 ALIAS:
4297 on_leave = 1
2281 PROTOTYPE: $ 4298 PROTOTYPE: &
4299 CODE:
4300{
4301 struct coro *coro = SvSTATE_current;
4302 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4303
4304 block = s_get_cv_croak (block);
4305
4306 if (!*avp)
4307 *avp = newAV ();
4308
4309 av_push (*avp, SvREFCNT_inc (block));
4310
4311 if (!ix)
4312 on_enterleave_call (aTHX_ block);
4313
4314 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4315 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4316 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4317}
4318
4319
4320MODULE = Coro::State PACKAGE = PerlIO::cede
4321
4322BOOT:
4323 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4324
4325
4326MODULE = Coro::State PACKAGE = Coro::Semaphore
4327
4328SV *
4329new (SV *klass, SV *count = 0)
4330 CODE:
4331{
4332 int semcnt = 1;
4333
4334 if (count)
4335 {
4336 SvGETMAGIC (count);
4337
4338 if (SvOK (count))
4339 semcnt = SvIV (count);
4340 }
4341
4342 RETVAL = sv_bless (
4343 coro_waitarray_new (aTHX_ semcnt),
4344 GvSTASH (CvGV (cv))
4345 );
4346}
4347 OUTPUT:
4348 RETVAL
4349
4350# helper for Coro::Channel and others
4351SV *
4352_alloc (int count)
4353 CODE:
4354 RETVAL = coro_waitarray_new (aTHX_ count);
4355 OUTPUT:
4356 RETVAL
4357
4358SV *
4359count (SV *self)
4360 CODE:
4361 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4362 OUTPUT:
4363 RETVAL
4364
4365void
4366up (SV *self)
4367 CODE:
4368 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4369
4370void
4371adjust (SV *self, int adjust)
4372 CODE:
4373 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4374
4375void
4376down (...)
4377 CODE:
4378 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4379
4380void
4381wait (...)
4382 CODE:
4383 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4384
4385void
4386try (SV *self)
4387 PPCODE:
4388{
4389 AV *av = (AV *)SvRV (self);
4390 SV *count_sv = AvARRAY (av)[0];
4391 IV count = SvIVX (count_sv);
4392
4393 if (count > 0)
4394 {
4395 --count;
4396 SvIVX (count_sv) = count;
4397 XSRETURN_YES;
4398 }
4399 else
4400 XSRETURN_NO;
4401}
4402
4403void
4404waiters (SV *self)
2282 PPCODE: 4405 PPCODE:
2283{ 4406{
4407 AV *av = (AV *)SvRV (self);
4408 int wcount = AvFILLp (av) + 1 - 1;
4409
4410 if (GIMME_V == G_SCALAR)
4411 XPUSHs (sv_2mortal (newSViv (wcount)));
4412 else
4413 {
4414 int i;
4415 EXTEND (SP, wcount);
4416 for (i = 1; i <= wcount; ++i)
4417 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4418 }
4419}
4420
4421MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4422
4423void
4424_may_delete (SV *sem, int count, unsigned int extra_refs)
4425 PPCODE:
4426{
2284 AV *av = (AV *)SvRV (state); 4427 AV *av = (AV *)SvRV (sem);
2285 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2286 int i;
2287 4428
2288 errno = data->errorno; 4429 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2289 PL_laststype = data->laststype; 4430 && AvFILLp (av) == 0 /* no waiters, just count */
2290 PL_laststatval = data->laststatval; 4431 && SvIV (AvARRAY (av)[0]) == count)
2291 PL_statcache = data->statcache; 4432 XSRETURN_YES;
2292 4433
4434 XSRETURN_NO;
4435}
4436
4437MODULE = Coro::State PACKAGE = Coro::Signal
4438
4439SV *
4440new (SV *klass)
4441 CODE:
4442 RETVAL = sv_bless (
4443 coro_waitarray_new (aTHX_ 0),
4444 GvSTASH (CvGV (cv))
4445 );
4446 OUTPUT:
4447 RETVAL
4448
4449void
4450wait (...)
4451 CODE:
4452 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4453
4454void
4455broadcast (SV *self)
4456 CODE:
4457{
4458 AV *av = (AV *)SvRV (self);
4459 coro_signal_wake (aTHX_ av, AvFILLp (av));
4460}
4461
4462void
4463send (SV *self)
4464 CODE:
4465{
4466 AV *av = (AV *)SvRV (self);
4467
2293 EXTEND (SP, AvFILLp (av)); 4468 if (AvFILLp (av))
2294 for (i = 0; i < AvFILLp (av); ++i) 4469 coro_signal_wake (aTHX_ av, 1);
2295 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 4470 else
4471 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2296} 4472}
4473
4474IV
4475awaited (SV *self)
4476 CODE:
4477 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4478 OUTPUT:
4479 RETVAL
2297 4480
2298 4481
2299MODULE = Coro::State PACKAGE = Coro::AnyEvent 4482MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300 4483
2301BOOT: 4484BOOT:
2302 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 4485 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303 4486
2304SV * 4487void
2305_schedule (...) 4488_schedule (...)
2306 PROTOTYPE: @
2307 CODE: 4489 CODE:
2308{ 4490{
2309 static int incede; 4491 static int incede;
2310 4492
2311 api_cede_notself (); 4493 api_cede_notself (aTHX);
2312 4494
2313 ++incede; 4495 ++incede;
2314 while (coro_nready >= incede && api_cede ()) 4496 while (coro_nready >= incede && api_cede (aTHX))
2315 ; 4497 ;
2316 4498
2317 sv_setsv (sv_activity, &PL_sv_undef); 4499 sv_setsv (sv_activity, &PL_sv_undef);
2318 if (coro_nready >= incede) 4500 if (coro_nready >= incede)
2319 { 4501 {
2320 PUSHMARK (SP); 4502 PUSHMARK (SP);
2321 PUTBACK; 4503 PUTBACK;
2322 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 4504 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2323 SPAGAIN;
2324 } 4505 }
2325 4506
2326 --incede; 4507 --incede;
2327} 4508}
2328 4509
2329 4510
2330MODULE = Coro::State PACKAGE = PerlIO::cede 4511MODULE = Coro::State PACKAGE = Coro::AIO
2331 4512
2332BOOT: 4513void
2333 PerlIO_define_layer (aTHX_ &PerlIO_cede); 4514_register (char *target, char *proto, SV *req)
4515 CODE:
4516{
4517 SV *req_cv = s_get_cv_croak (req);
4518 /* newXSproto doesn't return the CV on 5.8 */
4519 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4520 sv_setpv ((SV *)slf_cv, proto);
4521 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4522}
4523
4524MODULE = Coro::State PACKAGE = Coro::Select
4525
4526void
4527patch_pp_sselect ()
4528 CODE:
4529 if (!coro_old_pp_sselect)
4530 {
4531 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4532 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4533 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4534 }
4535
4536void
4537unpatch_pp_sselect ()
4538 CODE:
4539 if (coro_old_pp_sselect)
4540 {
4541 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4542 coro_old_pp_sselect = 0;
4543 }
4544
4545MODULE = Coro::State PACKAGE = Coro::Util
4546
4547void
4548_exit (int code)
4549 CODE:
4550 _exit (code);
4551
4552NV
4553time ()
4554 CODE:
4555 RETVAL = nvtime (aTHX);
4556 OUTPUT:
4557 RETVAL
4558
4559NV
4560gettimeofday ()
4561 PPCODE:
4562{
4563 UV tv [2];
4564 u2time (aTHX_ tv);
4565 EXTEND (SP, 2);
4566 PUSHs (sv_2mortal (newSVuv (tv [0])));
4567 PUSHs (sv_2mortal (newSVuv (tv [1])));
4568}
4569

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