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Comparing Coro/Coro/State.xs (file contents):
Revision 1.225 by root, Wed Mar 12 14:13:11 2008 UTC vs.
Revision 1.462 by root, Wed Jun 22 20:24:38 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"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
11 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
12#include <stdio.h> 23#include <stdio.h>
13#include <errno.h> 24#include <errno.h>
14#include <assert.h> 25#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
16 26
17#ifdef HAVE_MMAP 27#ifndef SvREFCNT_dec_NN
18# include <unistd.h> 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
19# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS
21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
23# else
24# undef HAVE_MMAP
25# endif 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;
26# endif 47# endif
27# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
28# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
29# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
31static long pagesize; 52# define PadMAX AvFILLp
32# else 53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
33# define BOOT_PAGESIZE (void)0
34# endif 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
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
35#else 74#else
36# define PAGESIZE 0 75# include <inttypes.h> /* most portable stdint.h */
37# define BOOT_PAGESIZE (void)0
38#endif
39
40#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 76#endif
46 77
47/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
49 80
50#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
51 (PERL_REVISION > (a) \ 82# define HAS_SCOPESTACK_NAME 1
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.8 */
78#ifndef GV_NOTQUAL
79# define GV_NOTQUAL 0
80#endif
81#ifndef newSV
82# define newSV(l) NEWSV(0,l)
83#endif
84
85/* 5.11 */
86#ifndef CxHASARGS
87# define CxHASARGS(cx) (cx)->blk_sub.hasargs
88#endif
89
90/* 5.8.7 */
91#ifndef SvRV_set
92# define SvRV_set(s,v) SvRV(s) = (v)
93#endif
94
95#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
96# undef CORO_STACKGUARD
97#endif
98
99#ifndef CORO_STACKGUARD
100# define CORO_STACKGUARD 0
101#endif 83#endif
102 84
103/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
104#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
105# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
106#endif 88#endif
107 89
108/* 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
109 * portable way as possible. */ 91 * portable way as possible. */
110#define dSTACKLEVEL volatile char stacklevel
111#define STACKLEVEL ((void *)&stacklevel)
112
113#define IN_DESTRUCT (PL_main_cv == Nullcv)
114
115#if __GNUC__ >= 3 92#if __GNUC__ >= 4
116# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
117# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
118# define expect(expr,value) __builtin_expect ((expr),(value))
119#else 95#else
120# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
121# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
122# define expect(expr,value) (expr)
123#endif 98#endif
124 99
125#define expect_false(expr) expect ((expr) != 0, 0) 100#define IN_DESTRUCT PL_dirty
126#define expect_true(expr) expect ((expr) != 0, 1)
127
128#define NOINLINE attribute ((noinline))
129 101
130#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
131 104
132#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
133static perl_mutex coro_mutex; 106# if CORO_PTHREAD
134# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
135# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
136#else
137# define LOCK (void)0
138# define UNLOCK (void)0
139#endif 108# endif
109#endif
140 110
141/* helper storage struct for Coro::AIO */ 111#ifdef __linux
142struct io_state 112# include <time.h> /* for timespec */
143{ 113# include <syscall.h> /* for SYS_* */
144 int errorno; 114# ifdef SYS_clock_gettime
145 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
146 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
147 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
148}; 118# endif
119#endif
149 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
150static size_t coro_stacksize = CORO_STACKSIZE; 130static size_t cctx_stacksize = CORO_STACKSIZE;
151static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
152static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
153static JMPENV *main_top_env; 133static JMPENV *main_top_env;
154static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
155static volatile SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
156 140
157static GV *irsgv; /* $/ */ 141static GV *irsgv; /* $/ */
158static GV *stdoutgv; /* *STDOUT */ 142static GV *stdoutgv; /* *STDOUT */
159static SV *rv_diehook; 143static SV *rv_diehook;
160static SV *rv_warnhook; 144static SV *rv_warnhook;
161static HV *hv_sig; /* %SIG */
162 145
163/* async_pool helper stuff */ 146/* async_pool helper stuff */
164static SV *sv_pool_rss; 147static SV *sv_pool_rss;
165static SV *sv_pool_size; 148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
166static AV *av_async_pool; 150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
167 162
168static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
169static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
170 165
171enum { 166enum
167{
172 CC_MAPPED = 0x01, 168 CC_MAPPED = 0x01,
173 CC_NOREUSE = 0x02, /* throw this away after tracing */ 169 CC_NOREUSE = 0x02, /* throw this away after tracing */
174 CC_TRACE = 0x04, 170 CC_TRACE = 0x04,
175 CC_TRACE_SUB = 0x08, /* trace sub calls */ 171 CC_TRACE_SUB = 0x08, /* trace sub calls */
176 CC_TRACE_LINE = 0x10, /* trace each statement */ 172 CC_TRACE_LINE = 0x10, /* trace each statement */
177 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
178}; 174};
179 175
180/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
181typedef struct coro_cctx { 177typedef struct coro_cctx
178{
182 struct coro_cctx *next; 179 struct coro_cctx *next;
183 180
184 /* the stack */ 181 /* the stack */
185 void *sptr; 182 struct coro_stack stack;
186 size_t ssize;
187 183
188 /* cpu state */ 184 /* cpu state */
189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
191 JMPENV *top_env; 189 JMPENV *top_env;
192 coro_context cctx; 190 coro_context cctx;
193 191
192 U32 gen;
194#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
195 int valgrind_id; 194 int valgrind_id;
196#endif 195#endif
197 unsigned char flags; 196 unsigned char flags;
198} coro_cctx; 197} coro_cctx;
199 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
200enum { 205enum
206{
201 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
202 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
203 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
204 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
205}; 213};
206 214
207/* the structure where most of the perl state is stored, overlaid on the cxstack */ 215/* the structure where most of the perl state is stored, overlaid on the cxstack */
208typedef struct { 216typedef struct
209 SV *defsv; 217{
210 AV *defav;
211 SV *errsv;
212 SV *irsgv;
213#define VAR(name,type) type name; 218 #define VARx(name,expr,type) type name;
214# include "state.h" 219 #include "state.h"
215#undef VAR
216} perl_slots; 220} perl_slots;
217 221
222/* how many context stack entries do we need for perl_slots */
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219 224
220/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
221struct coro { 226struct coro
227{
222 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
223 coro_cctx *cctx; 229 coro_cctx *cctx;
224 230
225 /* process data */ 231 /* ready queue */
232 struct coro *next_ready;
233
234 /* state data */
235 struct CoroSLF slf_frame; /* saved slf frame */
226 AV *mainstack; 236 AV *mainstack;
227 perl_slots *slot; /* basically the saved sp */ 237 perl_slots *slot; /* basically the saved sp */
228 238
239 CV *startcv; /* the CV to execute */
229 AV *args; /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
230 int refcnt; /* coroutines are refcounted, yes */
231 int flags; /* CF_ flags */ 241 int flags; /* CF_ flags */
232 HV *hv; /* the perl hash associated with this coro, if any */ 242 HV *hv; /* the perl hash associated with this coro, if any */
233 243
234 /* statistics */ 244 /* statistics */
235 int usecount; /* number of transfers to this coro */ 245 int usecount; /* number of transfers to this coro */
236 246
237 /* coro process data */ 247 /* coro process data */
238 int prio; 248 int prio;
239 SV *throw; /* exception to be thrown */ 249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
240 253
241 /* async_pool */ 254 /* async_pool */
242 SV *saved_deffh; 255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
243 268
244 /* linked list */ 269 /* linked list */
245 struct coro *next, *prev; 270 struct coro *next, *prev;
246}; 271};
247 272
248typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
249typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
250 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
251/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
252 282
253#define PRIO_MAX 3 283#define CORO_PRIO_MAX 3
254#define PRIO_HIGH 1 284#define CORO_PRIO_HIGH 1
255#define PRIO_NORMAL 0 285#define CORO_PRIO_NORMAL 0
256#define PRIO_LOW -1 286#define CORO_PRIO_LOW -1
257#define PRIO_IDLE -3 287#define CORO_PRIO_IDLE -3
258#define PRIO_MIN -4 288#define CORO_PRIO_MIN -4
259 289
260/* for Coro.pm */ 290/* for Coro.pm */
261static SV *coro_current; 291static SV *coro_current;
262static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static SV *coro_readyhook;
263static int coro_nready; 293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
264static struct coro *coro_first; 295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
329{
330 dSP;
331 PUSHMARK (SP - 4); /* fake argument list */
332 XPUSHs (coro_select_select);
333 PUTBACK;
334
335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
336 PL_op->op_flags |= OPf_STACKED;
337 PL_op->op_private = 0;
338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
376 SV **svp;
377
378 require_pv ("Time/HiRes.pm");
379
380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
381
382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
265 392
266/** lowlevel stuff **********************************************************/ 393/** lowlevel stuff **********************************************************/
267 394
268static SV * 395static SV * ecb_noinline
269coro_get_sv (pTHX_ const char *name, int create) 396coro_get_sv (pTHX_ const char *name, int create)
270{ 397{
271#if PERL_VERSION_ATLEAST (5,9,0) 398#if PERL_VERSION_ATLEAST (5,10,0)
272 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
273 get_sv (name, create); 400 get_sv (name, create);
274#endif 401#endif
275 return get_sv (name, create); 402 return get_sv (name, create);
276} 403}
277 404
278static AV * 405static AV * ecb_noinline
279coro_get_av (pTHX_ const char *name, int create) 406coro_get_av (pTHX_ const char *name, int create)
280{ 407{
281#if PERL_VERSION_ATLEAST (5,9,0) 408#if PERL_VERSION_ATLEAST (5,10,0)
282 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
283 get_av (name, create); 410 get_av (name, create);
284#endif 411#endif
285 return get_av (name, create); 412 return get_av (name, create);
286} 413}
287 414
288static HV * 415static HV * ecb_noinline
289coro_get_hv (pTHX_ const char *name, int create) 416coro_get_hv (pTHX_ const char *name, int create)
290{ 417{
291#if PERL_VERSION_ATLEAST (5,9,0) 418#if PERL_VERSION_ATLEAST (5,10,0)
292 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
293 get_hv (name, create); 420 get_hv (name, create);
294#endif 421#endif
295 return get_hv (name, create); 422 return get_hv (name, create);
296} 423}
297 424
298static AV * 425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
299coro_clone_padlist (pTHX_ CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
300{ 532{
301 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
302 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
303 538
304 newpadlist = newAV (); 539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
305 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
306#if PERL_VERSION_ATLEAST (5,9,0)
307 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
308#else
309 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
310#endif 568#endif
311 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
312 --AvFILLp (padlist);
313 569
314 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
315 av_store (newpadlist, 1, (SV *)newpad); 571 PadlistMAX (newpadlist) = 1;
572
573 padnames = PadlistNAMES (padlist);
574 ++PadnamelistREFCNT (padnames);
575 PadlistNAMES (newpadlist) = padnames;
576
577 PadlistARRAY (newpadlist)[1] = newpad;
316 578
317 return newpadlist; 579 return newpadlist;
318} 580}
319 581
320static void 582ecb_inline void
321free_padlist (pTHX_ AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
322{ 584{
323 /* may be during global destruction */ 585 /* may be during global destruction */
324 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
325 { 587 {
326 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
327 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
328 { 591 {
329 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
330 if (svp) 595 if (pad)
331 { 596 {
332 SV *sv; 597 I32 j = PadMAX (pad);
333 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
334 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
335 601
602 PadMAX (pad) = -1;
336 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
337 } 604 }
338 } 605 }
339 606
607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
608
609#if NEWPADAPI
610 Safefree (PadlistARRAY (padlist));
611 Safefree (padlist);
612#else
613 AvFILLp (padlist) = -1;
614 AvREAL_off (padlist);
340 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
341 } 617 }
342} 618}
343 619
344static int 620static int
345coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
346{ 622{
347 AV *padlist; 623 PADLIST *padlist;
348 AV *av = (AV *)mg->mg_obj; 624 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
625 size_t len = *(size_t *)mg->mg_ptr;
349 626
350 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
351 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
352 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
353 633
354 return 0; 634 return 0;
355} 635}
356
357#define CORO_MAGIC_type_cv PERL_MAGIC_ext
358#define CORO_MAGIC_type_state PERL_MAGIC_ext
359 636
360static MGVTBL coro_cv_vtbl = { 637static MGVTBL coro_cv_vtbl = {
361 0, 0, 0, 0, 638 0, 0, 0, 0,
362 coro_cv_free 639 coro_cv_free
363}; 640};
364 641
365#define CORO_MAGIC(sv,type) \
366 SvMAGIC (sv) \
367 ? SvMAGIC (sv)->mg_type == type \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type) \
370 : 0
371
372#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
373#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
374
375static struct coro *
376SvSTATE_ (pTHX_ SV *coro)
377{
378 HV *stash;
379 MAGIC *mg;
380
381 if (SvROK (coro))
382 coro = SvRV (coro);
383
384 if (expect_false (SvTYPE (coro) != SVt_PVHV))
385 croak ("Coro::State object required");
386
387 stash = SvSTASH (coro);
388 if (expect_false (stash != coro_stash && stash != coro_state_stash))
389 {
390 /* very slow, but rare, check */
391 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
392 croak ("Coro::State object required");
393 }
394
395 mg = CORO_MAGIC_state (coro);
396 return (struct coro *)mg->mg_ptr;
397}
398
399#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
400
401/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
402static void 643ecb_inline void
403get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
404{ 645{
405 MAGIC *mg = CORO_MAGIC_cv (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
406 AV *av; 647 size_t *lenp;
407 648
408 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
409 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
410 else 651 else
411 { 652 {
412#if CORO_PREFER_PERL_FUNCTIONS 653#if CORO_PREFER_PERL_FUNCTIONS
413 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
414 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
415 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
416 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
417 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
418#else 660#else
419 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
420#endif 662#endif
421 } 663 }
422} 664}
423 665
424static void 666ecb_inline void
425put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
426{ 668{
427 MAGIC *mg = CORO_MAGIC_cv (cv); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
428 AV *av;
429 670
430 if (expect_false (!mg)) 671 if (ecb_expect_false (!mg))
672 {
431 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 673 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
674 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
675 mg->mg_len = 1; /* so mg_free frees mg_ptr */
676 }
677 else
678 Renew (mg->mg_ptr,
679 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
680 char);
432 681
433 av = (AV *)mg->mg_obj; 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
434
435 if (expect_false (AvFILLp (av) >= AvMAX (av)))
436 av_extend (av, AvMAX (av) + 1);
437
438 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
439} 683}
440 684
441/** load & save, init *******************************************************/ 685/** load & save, init *******************************************************/
686
687ecb_inline void
688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
692
693 /* swap sv_any */
694 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
695
696 /* swap sv_flags */
697 SvFLAGS (&tmp) = SvFLAGS (a);
698 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
699 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
700
701#if PERL_VERSION_ATLEAST (5,10,0)
702 /* perl 5.10 and later complicates this _quite_ a bit, but it also
703 * is much faster, so no quarrels here. alternatively, we could
704 * sv_upgrade to avoid this.
705 */
706 {
707 /* swap sv_u */
708 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
709
710 /* if SvANY points to the head, we need to adjust the pointers,
711 * as the pointer for a still points to b, and maybe vice versa.
712 */
713 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
714 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
715 svany_in_head_set |= 1 << SVt_NV;
716 #endif
717
718 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
719
720 if (svany_in_head (SvTYPE (a)))
721 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
722
723 if (svany_in_head (SvTYPE (b)))
724 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
725 }
726#endif
727}
728
729/* swap sv heads, at least logically */
730static void
731swap_svs_enter (pTHX_ Coro__State c)
732{
733 int i;
734
735 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
736 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
737}
738
739static void
740swap_svs_leave (pTHX_ Coro__State c)
741{
742 int i;
743
744 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
745 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
746}
747
748#define SWAP_SVS_ENTER(coro) \
749 if (ecb_expect_false ((coro)->swap_sv)) \
750 swap_svs_enter (aTHX_ (coro))
751
752#define SWAP_SVS_LEAVE(coro) \
753 if (ecb_expect_false ((coro)->swap_sv)) \
754 swap_svs_leave (aTHX_ (coro))
755
756static void
757on_enterleave_call (pTHX_ SV *cb);
442 758
443static void 759static void
444load_perl (pTHX_ Coro__State c) 760load_perl (pTHX_ Coro__State c)
445{ 761{
446 perl_slots *slot = c->slot; 762 perl_slots *slot = c->slot;
447 c->slot = 0; 763 c->slot = 0;
448 764
449 PL_mainstack = c->mainstack; 765 PL_mainstack = c->mainstack;
450 766
451 GvSV (PL_defgv) = slot->defsv; 767#if CORO_JIT
452 GvAV (PL_defgv) = slot->defav; 768 load_perl_slots (slot);
453 GvSV (PL_errgv) = slot->errsv; 769#else
454 GvSV (irsgv) = slot->irsgv;
455
456 #define VAR(name,type) PL_ ## name = slot->name; 770 #define VARx(name,expr,type) expr = slot->name;
457 # include "state.h" 771 #include "state.h"
458 #undef VAR 772#endif
459 773
460 { 774 {
461 dSP; 775 dSP;
462 776
463 CV *cv; 777 CV *cv;
464 778
465 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
466 while (expect_true (cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
467 { 781 {
468 put_padlist (aTHX_ cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
469 CvDEPTH (cv) = PTR2IV (POPs); 783 CvDEPTH (cv) = PTR2IV (POPs);
470 CvPADLIST (cv) = (AV *)POPs; 784 CvPADLIST (cv) = (PADLIST *)POPs;
471 } 785 }
472 786
473 PUTBACK; 787 PUTBACK;
474 } 788 }
789
790 slf_frame = c->slf_frame;
791 CORO_THROW = c->except;
792
793 if (ecb_expect_false (enable_times))
794 {
795 if (ecb_expect_false (!times_valid))
796 coro_times_update ();
797
798 coro_times_sub (c);
799 }
800
801 if (ecb_expect_false (c->on_enter))
802 {
803 int i;
804
805 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
806 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
807 }
808
809 if (ecb_expect_false (c->on_enter_xs))
810 {
811 int i;
812
813 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
815 }
816
817 SWAP_SVS_ENTER (c);
475} 818}
476 819
477static void 820static void
478save_perl (pTHX_ Coro__State c) 821save_perl (pTHX_ Coro__State c)
479{ 822{
823 SWAP_SVS_LEAVE (c);
824
825 if (ecb_expect_false (c->on_leave_xs))
826 {
827 int i;
828
829 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
830 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
831 }
832
833 if (ecb_expect_false (c->on_leave))
834 {
835 int i;
836
837 for (i = AvFILLp (c->on_leave); i >= 0; --i)
838 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
839 }
840
841 times_valid = 0;
842
843 if (ecb_expect_false (enable_times))
844 {
845 coro_times_update (); times_valid = 1;
846 coro_times_add (c);
847 }
848
849 c->except = CORO_THROW;
850 c->slf_frame = slf_frame;
851
480 { 852 {
481 dSP; 853 dSP;
482 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
483 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
484 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
490 862
491 XPUSHs (Nullsv); 863 XPUSHs (Nullsv);
492 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
493 for (;;) 865 for (;;)
494 { 866 {
495 while (expect_true (cxix >= 0)) 867 while (ecb_expect_true (cxix >= 0))
496 { 868 {
497 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
498 870
499 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
500 { 872 {
501 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
502 874
503 if (expect_true (CvDEPTH (cv))) 875 if (ecb_expect_true (CvDEPTH (cv)))
504 { 876 {
505 EXTEND (SP, 3); 877 EXTEND (SP, 3);
506 PUSHs ((SV *)CvPADLIST (cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
507 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
508 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
509 881
510 CvDEPTH (cv) = 0; 882 CvDEPTH (cv) = 0;
511 get_padlist (aTHX_ cv); 883 get_padlist (aTHX_ cv);
512 } 884 }
513 } 885 }
514 } 886 }
515 887
516 if (expect_true (top_si->si_type == PERLSI_MAIN)) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
517 break; 889 break;
518 890
519 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
520 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
521 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
… …
523 895
524 PUTBACK; 896 PUTBACK;
525 } 897 }
526 898
527 /* allocate some space on the context stack for our purposes */ 899 /* allocate some space on the context stack for our purposes */
528 /* we manually unroll here, as usually 2 slots is enough */ 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
529 if (SLOT_COUNT >= 1) CXINC;
530 if (SLOT_COUNT >= 2) CXINC;
531 if (SLOT_COUNT >= 3) CXINC;
532 { 901 {
533 int i; 902 unsigned int i;
903
534 for (i = 3; i < SLOT_COUNT; ++i) 904 for (i = 0; i < SLOT_COUNT; ++i)
535 CXINC; 905 CXINC;
536 } 906
537 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
908 }
538 909
539 c->mainstack = PL_mainstack; 910 c->mainstack = PL_mainstack;
540 911
541 { 912 {
542 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
543 914
544 slot->defav = GvAV (PL_defgv); 915#if CORO_JIT
545 slot->defsv = DEFSV; 916 save_perl_slots (slot);
546 slot->errsv = ERRSV; 917#else
547 slot->irsgv = GvSV (irsgv);
548
549 #define VAR(name,type) slot->name = PL_ ## name; 918 #define VARx(name,expr,type) slot->name = expr;
550 # include "state.h" 919 #include "state.h"
551 #undef VAR 920#endif
552 } 921 }
553} 922}
554 923
555/* 924/*
556 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
557 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
558 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
559 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
560 */ 929 */
561#if CORO_PREFER_PERL_FUNCTIONS 930#if CORO_PREFER_PERL_FUNCTIONS
562# define coro_init_stacks init_stacks 931# define coro_init_stacks(thx) init_stacks ()
563#else 932#else
564static void 933static void
565coro_init_stacks (pTHX) 934coro_init_stacks (pTHX)
566{ 935{
567 PL_curstackinfo = new_stackinfo(32, 8); 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
568 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
569 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
570 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
571 940
572 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
… …
587#endif 956#endif
588 957
589 New(54,PL_scopestack,8,I32); 958 New(54,PL_scopestack,8,I32);
590 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
591 PL_scopestack_max = 8; 960 PL_scopestack_max = 8;
961#if HAS_SCOPESTACK_NAME
962 New(54,PL_scopestack_name,8,const char*);
963#endif
592 964
593 New(54,PL_savestack,24,ANY); 965 New(54,PL_savestack,24,ANY);
594 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
595 PL_savestack_max = 24; 967 PL_savestack_max = 24;
596
597#if !PERL_VERSION_ATLEAST (5,9,0) 968#if !PERL_VERSION_ATLEAST (5,24,0)
969 /* perl 5.24 moves SS_MAXPUSH optimisation from */
970 /* the header macros to PL_savestack_max */
971 PL_savestack_max -= SS_MAXPUSH;
972#endif
973
974#if !PERL_VERSION_ATLEAST (5,10,0)
598 New(54,PL_retstack,4,OP*); 975 New(54,PL_retstack,4,OP*);
599 PL_retstack_ix = 0; 976 PL_retstack_ix = 0;
600 PL_retstack_max = 4; 977 PL_retstack_max = 4;
601#endif 978#endif
602} 979}
… …
604 981
605/* 982/*
606 * destroy the stacks, the callchain etc... 983 * destroy the stacks, the callchain etc...
607 */ 984 */
608static void 985static void
609coro_destroy_stacks (pTHX) 986coro_destruct_stacks (pTHX)
610{ 987{
611 while (PL_curstackinfo->si_next) 988 while (PL_curstackinfo->si_next)
612 PL_curstackinfo = PL_curstackinfo->si_next; 989 PL_curstackinfo = PL_curstackinfo->si_next;
613 990
614 while (PL_curstackinfo) 991 while (PL_curstackinfo)
… …
624 } 1001 }
625 1002
626 Safefree (PL_tmps_stack); 1003 Safefree (PL_tmps_stack);
627 Safefree (PL_markstack); 1004 Safefree (PL_markstack);
628 Safefree (PL_scopestack); 1005 Safefree (PL_scopestack);
1006#if HAS_SCOPESTACK_NAME
1007 Safefree (PL_scopestack_name);
1008#endif
629 Safefree (PL_savestack); 1009 Safefree (PL_savestack);
630#if !PERL_VERSION_ATLEAST (5,9,0) 1010#if !PERL_VERSION_ATLEAST (5,10,0)
631 Safefree (PL_retstack); 1011 Safefree (PL_retstack);
632#endif 1012#endif
633} 1013}
1014
1015#define CORO_RSS \
1016 rss += sizeof (SYM (curstackinfo)); \
1017 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1018 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1019 rss += SYM (tmps_max) * sizeof (SV *); \
1020 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1021 rss += SYM (scopestack_max) * sizeof (I32); \
1022 rss += SYM (savestack_max) * sizeof (ANY);
634 1023
635static size_t 1024static size_t
636coro_rss (pTHX_ struct coro *coro) 1025coro_rss (pTHX_ struct coro *coro)
637{ 1026{
638 size_t rss = sizeof (*coro); 1027 size_t rss = sizeof (*coro);
639 1028
640 if (coro->mainstack) 1029 if (coro->mainstack)
641 { 1030 {
642 perl_slots tmp_slot;
643 perl_slots *slot;
644
645 if (coro->flags & CF_RUNNING) 1031 if (coro->flags & CF_RUNNING)
646 { 1032 {
647 slot = &tmp_slot; 1033 #define SYM(sym) PL_ ## sym
648 1034 CORO_RSS;
649 #define VAR(name,type) slot->name = PL_ ## name;
650 # include "state.h"
651 #undef VAR 1035 #undef SYM
652 } 1036 }
653 else 1037 else
654 slot = coro->slot; 1038 {
655 1039 #define SYM(sym) coro->slot->sym
656 rss += sizeof (slot->curstackinfo); 1040 CORO_RSS;
657 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1041 #undef SYM
658 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 1042 }
659 rss += slot->tmps_max * sizeof (SV *);
660 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
661 rss += slot->scopestack_max * sizeof (I32);
662 rss += slot->savestack_max * sizeof (ANY);
663
664#if !PERL_VERSION_ATLEAST (5,9,0)
665 rss += slot->retstack_max * sizeof (OP *);
666#endif
667 } 1043 }
668 1044
669 return rss; 1045 return rss;
670} 1046}
671 1047
672/** coroutine stack handling ************************************************/ 1048/** coroutine stack handling ************************************************/
673 1049
674static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 1050static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
675static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 1051static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1052static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1053
1054/* apparently < 5.8.8 */
1055#ifndef MgPV_nolen_const
1056#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1057 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1058 (const char*)(mg)->mg_ptr)
1059#endif
676 1060
677/* 1061/*
678 * This overrides the default magic get method of %SIG elements. 1062 * This overrides the default magic get method of %SIG elements.
679 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 1063 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
680 * and instead of tryign to save and restore the hash elements, we just provide 1064 * and instead of trying to save and restore the hash elements (extremely slow),
681 * readback here. 1065 * we just provide our own readback here.
682 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
683 * not expecting this to actually change the hook. This is a potential problem
684 * when a schedule happens then, but we ignore this.
685 */ 1066 */
686static int 1067static int ecb_cold
687coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 1068coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
688{ 1069{
689 const char *s = MgPV_nolen_const (mg); 1070 const char *s = MgPV_nolen_const (mg);
690 1071
691 if (*s == '_') 1072 if (*s == '_')
692 { 1073 {
693 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 1074 SV **svp = 0;
694 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 1075
1076 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1077 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1078
1079 if (svp)
1080 {
1081 SV *ssv;
1082
1083 if (!*svp)
1084 ssv = &PL_sv_undef;
1085 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1086 ssv = sv_2mortal (newRV_inc (*svp));
1087 else
1088 ssv = *svp;
1089
1090 sv_setsv (sv, ssv);
1091 return 0;
1092 }
695 } 1093 }
696 1094
697 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 1095 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
698} 1096}
699 1097
700static int 1098static int ecb_cold
701coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 1099coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
702{ 1100{
703 const char *s = MgPV_nolen_const (mg); 1101 const char *s = MgPV_nolen_const (mg);
704 1102
705 if (*s == '_') 1103 if (*s == '_')
706 { 1104 {
… …
710 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1108 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
711 1109
712 if (svp) 1110 if (svp)
713 { 1111 {
714 SV *old = *svp; 1112 SV *old = *svp;
715 *svp = newSVsv (sv); 1113 *svp = 0;
716 SvREFCNT_dec (old); 1114 SvREFCNT_dec (old);
717 return; 1115 return 0;
718 } 1116 }
719 } 1117 }
720 1118
1119 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1120}
1121
1122static int ecb_cold
1123coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1124{
1125 const char *s = MgPV_nolen_const (mg);
1126
1127 if (*s == '_')
1128 {
1129 SV **svp = 0;
1130
1131 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1132 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1133
1134 if (svp)
1135 {
1136 SV *old = *svp;
1137 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1138 SvREFCNT_dec (old);
1139 return 0;
1140 }
1141 }
1142
721 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1143 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
722} 1144}
723 1145
724static void 1146static void
1147prepare_nop (pTHX_ struct coro_transfer_args *ta)
1148{
1149 /* kind of mega-hacky, but works */
1150 ta->next = ta->prev = (struct coro *)ta;
1151}
1152
1153static int
1154slf_check_nop (pTHX_ struct CoroSLF *frame)
1155{
1156 return 0;
1157}
1158
1159static int
1160slf_check_repeat (pTHX_ struct CoroSLF *frame)
1161{
1162 return 1;
1163}
1164
1165static UNOP init_perl_op;
1166
1167ecb_noinline static void /* noinline to keep it out of the transfer fast path */
725coro_setup (pTHX_ struct coro *coro) 1168init_perl (pTHX_ struct coro *coro)
726{ 1169{
727 /* 1170 /*
728 * emulate part of the perl startup here. 1171 * emulate part of the perl startup here.
729 */ 1172 */
730 coro_init_stacks (aTHX); 1173 coro_init_stacks (aTHX);
731 1174
732 PL_runops = RUNOPS_DEFAULT; 1175 PL_runops = RUNOPS_DEFAULT;
733 PL_curcop = &PL_compiling; 1176 PL_curcop = &PL_compiling;
734 PL_in_eval = EVAL_NULL; 1177 PL_in_eval = EVAL_NULL;
735 PL_comppad = 0; 1178 PL_comppad = 0;
1179 PL_comppad_name = 0;
1180 PL_comppad_name_fill = 0;
1181 PL_comppad_name_floor = 0;
736 PL_curpm = 0; 1182 PL_curpm = 0;
737 PL_curpad = 0; 1183 PL_curpad = 0;
738 PL_localizing = 0; 1184 PL_localizing = 0;
739 PL_dirty = 0;
740 PL_restartop = 0; 1185 PL_restartop = 0;
1186#if PERL_VERSION_ATLEAST (5,10,0)
1187 PL_parser = 0;
1188#endif
1189 PL_hints = 0;
741 1190
742 /* recreate the die/warn hooks */ 1191 /* recreate the die/warn hooks */
743 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1192 PL_diehook = SvREFCNT_inc (rv_diehook);
744 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1193 PL_warnhook = SvREFCNT_inc (rv_warnhook);
745 1194
746 GvSV (PL_defgv) = newSV (0); 1195 GvSV (PL_defgv) = newSV (0);
747 GvAV (PL_defgv) = coro->args; coro->args = 0; 1196 GvAV (PL_defgv) = coro->args; coro->args = 0;
748 GvSV (PL_errgv) = newSV (0); 1197 GvSV (PL_errgv) = newSV (0);
749 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1198 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1199 GvHV (PL_hintgv) = newHV ();
1200#if PERL_VERSION_ATLEAST (5,10,0)
1201 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1202#endif
750 PL_rs = newSVsv (GvSV (irsgv)); 1203 PL_rs = newSVsv (GvSV (irsgv));
751 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1204 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
752 1205
753 { 1206 {
754 dSP; 1207 dSP;
755 LOGOP myop; 1208 UNOP myop;
756 1209
757 Zero (&myop, 1, LOGOP); 1210 Zero (&myop, 1, UNOP);
758 myop.op_next = Nullop; 1211 myop.op_next = Nullop;
1212 myop.op_type = OP_ENTERSUB;
759 myop.op_flags = OPf_WANT_VOID; 1213 myop.op_flags = OPf_WANT_VOID;
760 1214
761 PUSHMARK (SP); 1215 PUSHMARK (SP);
762 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1216 PUSHs ((SV *)coro->startcv);
763 PUTBACK; 1217 PUTBACK;
764 PL_op = (OP *)&myop; 1218 PL_op = (OP *)&myop;
765 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1219 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
766 SPAGAIN;
767 } 1220 }
768 1221
769 /* this newly created coroutine might be run on an existing cctx which most 1222 /* this newly created coroutine might be run on an existing cctx which most
770 * likely was suspended in set_stacklevel, called from entersub. 1223 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
771 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
772 * so we ENTER here for symmetry
773 */ 1224 */
774 ENTER; 1225 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
775} 1226 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1227 slf_frame.destroy = 0;
776 1228
1229 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1230 init_perl_op.op_next = PL_op;
1231 init_perl_op.op_type = OP_ENTERSUB;
1232 init_perl_op.op_ppaddr = pp_slf;
1233 /* no flags etc. required, as an init function won't be called */
1234
1235 PL_op = (OP *)&init_perl_op;
1236
1237 /* copy throw, in case it was set before init_perl */
1238 CORO_THROW = coro->except;
1239
1240 SWAP_SVS_ENTER (coro);
1241
1242 if (ecb_expect_false (enable_times))
1243 {
1244 coro_times_update ();
1245 coro_times_sub (coro);
1246 }
1247}
1248
777static void 1249static void
778coro_destroy (pTHX_ struct coro *coro) 1250coro_unwind_stacks (pTHX)
779{ 1251{
780 if (!IN_DESTRUCT) 1252 if (!IN_DESTRUCT)
781 { 1253 {
782 /* restore all saved variables and stuff */ 1254 /* restore all saved variables and stuff */
783 LEAVE_SCOPE (0); 1255 LEAVE_SCOPE (0);
… …
791 POPSTACK_TO (PL_mainstack); 1263 POPSTACK_TO (PL_mainstack);
792 1264
793 /* unwind main stack */ 1265 /* unwind main stack */
794 dounwind (-1); 1266 dounwind (-1);
795 } 1267 }
1268}
796 1269
797 SvREFCNT_dec (GvSV (PL_defgv)); 1270static void
798 SvREFCNT_dec (GvAV (PL_defgv)); 1271destroy_perl (pTHX_ struct coro *coro)
799 SvREFCNT_dec (GvSV (PL_errgv)); 1272{
800 SvREFCNT_dec (PL_defoutgv); 1273 SV *svf [9];
801 SvREFCNT_dec (PL_rs);
802 SvREFCNT_dec (GvSV (irsgv));
803 1274
804 SvREFCNT_dec (PL_diehook);
805 SvREFCNT_dec (PL_warnhook);
806 1275 {
1276 SV *old_current = SvRV (coro_current);
1277 struct coro *current = SvSTATE (old_current);
1278
1279 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1280
1281 save_perl (aTHX_ current);
1282
1283 /* this will cause transfer_check to croak on block*/
1284 SvRV_set (coro_current, (SV *)coro->hv);
1285
1286 load_perl (aTHX_ coro);
1287
1288 /* restore swapped sv's */
1289 SWAP_SVS_LEAVE (coro);
1290
1291 coro_unwind_stacks (aTHX);
1292
1293 coro_destruct_stacks (aTHX);
1294
1295 /* now save some sv's to be free'd later */
1296 svf [0] = GvSV (PL_defgv);
1297 svf [1] = (SV *)GvAV (PL_defgv);
1298 svf [2] = GvSV (PL_errgv);
1299 svf [3] = (SV *)PL_defoutgv;
1300 svf [4] = PL_rs;
1301 svf [5] = GvSV (irsgv);
1302 svf [6] = (SV *)GvHV (PL_hintgv);
1303 svf [7] = PL_diehook;
1304 svf [8] = PL_warnhook;
1305 assert (9 == sizeof (svf) / sizeof (*svf));
1306
1307 SvRV_set (coro_current, old_current);
1308
1309 load_perl (aTHX_ current);
1310 }
1311
1312 {
1313 unsigned int i;
1314
1315 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1316 SvREFCNT_dec (svf [i]);
1317
807 SvREFCNT_dec (coro->saved_deffh); 1318 SvREFCNT_dec (coro->saved_deffh);
808 SvREFCNT_dec (coro->throw); 1319 SvREFCNT_dec (coro->rouse_cb);
809 1320 SvREFCNT_dec (coro->invoke_cb);
810 coro_destroy_stacks (aTHX); 1321 SvREFCNT_dec (coro->invoke_av);
1322 SvREFCNT_dec (coro->on_enter_xs);
1323 SvREFCNT_dec (coro->on_leave_xs);
1324 }
811} 1325}
812 1326
813static void 1327ecb_inline void
814free_coro_mortal (pTHX) 1328free_coro_mortal (pTHX)
815{ 1329{
816 if (expect_true (coro_mortal)) 1330 if (ecb_expect_true (coro_mortal))
817 { 1331 {
818 SvREFCNT_dec (coro_mortal); 1332 SvREFCNT_dec ((SV *)coro_mortal);
819 coro_mortal = 0; 1333 coro_mortal = 0;
820 } 1334 }
821} 1335}
822 1336
823static int 1337static int
824runops_trace (pTHX) 1338runops_trace (pTHX)
825{ 1339{
826 COP *oldcop = 0; 1340 COP *oldcop = 0;
827 int oldcxix = -2; 1341 int oldcxix = -2;
828 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
829 coro_cctx *cctx = coro->cctx;
830 1342
831 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1343 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
832 { 1344 {
833 PERL_ASYNC_CHECK (); 1345 PERL_ASYNC_CHECK ();
834 1346
835 if (cctx->flags & CC_TRACE_ALL) 1347 if (cctx_current->flags & CC_TRACE_ALL)
836 { 1348 {
837 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1349 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
838 { 1350 {
839 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1351 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
840 SV **bot, **top; 1352 SV **bot, **top;
841 AV *av = newAV (); /* return values */ 1353 AV *av = newAV (); /* return values */
842 SV **cb; 1354 SV **cb;
… …
852 : cx->blk_gimme == G_SCALAR ? bot + 1 1364 : cx->blk_gimme == G_SCALAR ? bot + 1
853 : bot; 1365 : bot;
854 1366
855 av_extend (av, top - bot); 1367 av_extend (av, top - bot);
856 while (bot < top) 1368 while (bot < top)
857 av_push (av, SvREFCNT_inc (*bot++)); 1369 av_push (av, SvREFCNT_inc_NN (*bot++));
858 1370
859 PL_runops = RUNOPS_DEFAULT; 1371 PL_runops = RUNOPS_DEFAULT;
860 ENTER; 1372 ENTER;
861 SAVETMPS; 1373 SAVETMPS;
862 EXTEND (SP, 3); 1374 EXTEND (SP, 3);
… …
879 1391
880 if (PL_curcop != &PL_compiling) 1392 if (PL_curcop != &PL_compiling)
881 { 1393 {
882 SV **cb; 1394 SV **cb;
883 1395
884 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1396 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
885 { 1397 {
886 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1398 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
887 1399
888 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1400 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
889 { 1401 {
890 runops_proc_t old_runops = PL_runops;
891 dSP; 1402 dSP;
892 GV *gv = CvGV (cx->blk_sub.cv); 1403 GV *gv = CvGV (cx->blk_sub.cv);
893 SV *fullname = sv_2mortal (newSV (0)); 1404 SV *fullname = sv_2mortal (newSV (0));
894 1405
895 if (isGV (gv)) 1406 if (isGV (gv))
… …
900 SAVETMPS; 1411 SAVETMPS;
901 EXTEND (SP, 3); 1412 EXTEND (SP, 3);
902 PUSHMARK (SP); 1413 PUSHMARK (SP);
903 PUSHs (&PL_sv_yes); 1414 PUSHs (&PL_sv_yes);
904 PUSHs (fullname); 1415 PUSHs (fullname);
905 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1416 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
906 PUTBACK; 1417 PUTBACK;
907 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1418 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
908 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1419 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
909 SPAGAIN; 1420 SPAGAIN;
910 FREETMPS; 1421 FREETMPS;
… …
913 } 1424 }
914 1425
915 oldcxix = cxstack_ix; 1426 oldcxix = cxstack_ix;
916 } 1427 }
917 1428
918 if (cctx->flags & CC_TRACE_LINE) 1429 if (cctx_current->flags & CC_TRACE_LINE)
919 { 1430 {
920 dSP; 1431 dSP;
921 1432
922 PL_runops = RUNOPS_DEFAULT; 1433 PL_runops = RUNOPS_DEFAULT;
923 ENTER; 1434 ENTER;
… …
942 1453
943 TAINT_NOT; 1454 TAINT_NOT;
944 return 0; 1455 return 0;
945} 1456}
946 1457
947/* inject a fake call to Coro::State::_cctx_init into the execution */ 1458static struct CoroSLF cctx_ssl_frame;
948/* _cctx_init should be careful, as it could be called at almost any time */
949/* during execution of a perl program */
950static void NOINLINE
951cctx_prepare (pTHX_ coro_cctx *cctx)
952{
953 dSP;
954 LOGOP myop;
955 1459
1460static void
1461slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1462{
1463 ta->prev = 0;
1464}
1465
1466static int
1467slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1468{
1469 *frame = cctx_ssl_frame;
1470
1471 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1472}
1473
1474/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1475static void ecb_noinline
1476cctx_prepare (pTHX)
1477{
956 PL_top_env = &PL_start_env; 1478 PL_top_env = &PL_start_env;
957 1479
958 if (cctx->flags & CC_TRACE) 1480 if (cctx_current->flags & CC_TRACE)
959 PL_runops = runops_trace; 1481 PL_runops = runops_trace;
960 1482
961 Zero (&myop, 1, LOGOP); 1483 /* we already must be executing an SLF op, there is no other valid way
962 myop.op_next = PL_op; 1484 * that can lead to creation of a new cctx */
963 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1485 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1486 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
964 1487
965 PUSHMARK (SP); 1488 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
966 EXTEND (SP, 2); 1489 cctx_ssl_frame = slf_frame;
967 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1490
968 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1491 slf_frame.prepare = slf_prepare_set_stacklevel;
969 PUTBACK; 1492 slf_frame.check = slf_check_set_stacklevel;
970 PL_op = (OP *)&myop; 1493}
971 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1494
972 SPAGAIN; 1495/* the tail of transfer: execute stuff we can only do after a transfer */
1496ecb_inline void
1497transfer_tail (pTHX)
1498{
1499 free_coro_mortal (aTHX);
1500}
1501
1502/* try to exit the same way perl's main function would do */
1503/* we do not bother resetting the environment or other things *7
1504/* that are not, uhm, essential */
1505/* this obviously also doesn't work when perl is embedded */
1506static void ecb_noinline ecb_cold
1507perlish_exit (pTHX)
1508{
1509 int exitstatus = perl_destruct (PL_curinterp);
1510 perl_free (PL_curinterp);
1511 exit (exitstatus);
973} 1512}
974 1513
975/* 1514/*
976 * this is a _very_ stripped down perl interpreter ;) 1515 * this is a _very_ stripped down perl interpreter ;)
977 */ 1516 */
978static void 1517static void
979cctx_run (void *arg) 1518cctx_run (void *arg)
980{ 1519{
1520#ifdef USE_ITHREADS
1521# if CORO_PTHREAD
1522 PERL_SET_CONTEXT (coro_thx);
1523# endif
1524#endif
1525 {
981 dTHX; 1526 dTHX;
982 1527
983 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1528 /* normally we would need to skip the entersub here */
984 UNLOCK; 1529 /* not doing so will re-execute it, which is exactly what we want */
985
986 /* we now skip the entersub that lead to transfer() */
987 PL_op = PL_op->op_next; 1530 /* PL_nop = PL_nop->op_next */
988 1531
989 /* inject a fake subroutine call to cctx_init */ 1532 /* inject a fake subroutine call to cctx_init */
990 cctx_prepare (aTHX_ (coro_cctx *)arg); 1533 cctx_prepare (aTHX);
991 1534
1535 /* cctx_run is the alternative tail of transfer() */
1536 transfer_tail (aTHX);
1537
992 /* somebody or something will hit me for both perl_run and PL_restartop */ 1538 /* somebody or something will hit me for both perl_run and PL_restartop */
993 PL_restartop = PL_op; 1539 PL_restartop = PL_op;
994 perl_run (PL_curinterp); 1540 perl_run (PL_curinterp);
995
996 /* 1541 /*
1542 * Unfortunately, there is no way to get at the return values of the
1543 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1544 * runtime errors here, as this is just a random interpreter, not a thread.
1545 */
1546
1547 /*
997 * If perl-run returns we assume exit() was being called or the coro 1548 * If perl-run returns we assume exit() was being called or the coro
998 * fell off the end, which seems to be the only valid (non-bug) 1549 * fell off the end, which seems to be the only valid (non-bug)
999 * reason for perl_run to return. We try to exit by jumping to the 1550 * reason for perl_run to return. We try to mimic whatever perl is normally
1000 * bootstrap-time "top" top_env, as we cannot restore the "main" 1551 * doing in that case. YMMV.
1001 * coroutine as Coro has no such concept
1002 */ 1552 */
1003 PL_top_env = main_top_env; 1553 perlish_exit (aTHX);
1004 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1554 }
1005} 1555}
1006 1556
1007static coro_cctx * 1557static coro_cctx *
1008cctx_new () 1558cctx_new (void)
1009{ 1559{
1010 coro_cctx *cctx; 1560 coro_cctx *cctx;
1011 void *stack_start;
1012 size_t stack_size;
1013 1561
1014 ++cctx_count; 1562 ++cctx_count;
1015
1016 Newz (0, cctx, 1, coro_cctx); 1563 New (0, cctx, 1, coro_cctx);
1017 1564
1018#if HAVE_MMAP 1565 cctx->gen = cctx_gen;
1019 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1566 cctx->flags = 0;
1020 /* mmap supposedly does allocate-on-write for us */ 1567 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1021 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1022 1568
1023 if (cctx->sptr != (void *)-1) 1569 return cctx;
1024 { 1570}
1025# if CORO_STACKGUARD 1571
1026 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1572/* create a new cctx only suitable as source */
1027# endif 1573static coro_cctx *
1028 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1574cctx_new_empty (void)
1029 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1575{
1030 cctx->flags |= CC_MAPPED; 1576 coro_cctx *cctx = cctx_new ();
1577
1578 cctx->stack.sptr = 0;
1579 coro_create (&cctx->cctx, 0, 0, 0, 0);
1580
1581 return cctx;
1582}
1583
1584/* create a new cctx suitable as destination/running a perl interpreter */
1585static coro_cctx *
1586cctx_new_run (void)
1587{
1588 coro_cctx *cctx = cctx_new ();
1589
1590 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1031 } 1591 {
1032 else
1033#endif
1034 {
1035 cctx->ssize = coro_stacksize * (long)sizeof (long);
1036 New (0, cctx->sptr, coro_stacksize, long);
1037
1038 if (!cctx->sptr)
1039 {
1040 perror ("FATAL: unable to allocate stack for coroutine"); 1592 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1041 _exit (EXIT_FAILURE); 1593 _exit (EXIT_FAILURE);
1042 }
1043
1044 stack_start = cctx->sptr;
1045 stack_size = cctx->ssize;
1046 } 1594 }
1047 1595
1048 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1049 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1596 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1050 1597
1051 return cctx; 1598 return cctx;
1052} 1599}
1053 1600
1054static void 1601static void
1055cctx_destroy (coro_cctx *cctx) 1602cctx_destroy (coro_cctx *cctx)
1056{ 1603{
1057 if (!cctx) 1604 if (!cctx)
1058 return; 1605 return;
1059 1606
1607 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1608
1060 --cctx_count; 1609 --cctx_count;
1610 coro_destroy (&cctx->cctx);
1061 1611
1062#if CORO_USE_VALGRIND 1612 coro_stack_free (&cctx->stack);
1063 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1064#endif
1065
1066#if HAVE_MMAP
1067 if (cctx->flags & CC_MAPPED)
1068 munmap (cctx->sptr, cctx->ssize);
1069 else
1070#endif
1071 Safefree (cctx->sptr);
1072 1613
1073 Safefree (cctx); 1614 Safefree (cctx);
1074} 1615}
1075 1616
1076/* wether this cctx should be destructed */ 1617/* wether this cctx should be destructed */
1077#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1618#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1078 1619
1079static coro_cctx * 1620static coro_cctx *
1080cctx_get (pTHX) 1621cctx_get (pTHX)
1081{ 1622{
1082 while (expect_true (cctx_first)) 1623 while (ecb_expect_true (cctx_first))
1083 { 1624 {
1084 coro_cctx *cctx = cctx_first; 1625 coro_cctx *cctx = cctx_first;
1085 cctx_first = cctx->next; 1626 cctx_first = cctx->next;
1086 --cctx_idle; 1627 --cctx_idle;
1087 1628
1088 if (expect_true (!CCTX_EXPIRED (cctx))) 1629 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1089 return cctx; 1630 return cctx;
1090 1631
1091 cctx_destroy (cctx); 1632 cctx_destroy (cctx);
1092 } 1633 }
1093 1634
1094 return cctx_new (); 1635 return cctx_new_run ();
1095} 1636}
1096 1637
1097static void 1638static void
1098cctx_put (coro_cctx *cctx) 1639cctx_put (coro_cctx *cctx)
1099{ 1640{
1641 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1642
1100 /* free another cctx if overlimit */ 1643 /* free another cctx if overlimit */
1101 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1644 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1102 { 1645 {
1103 coro_cctx *first = cctx_first; 1646 coro_cctx *first = cctx_first;
1104 cctx_first = first->next; 1647 cctx_first = first->next;
1105 --cctx_idle; 1648 --cctx_idle;
1106 1649
… …
1115/** coroutine switching *****************************************************/ 1658/** coroutine switching *****************************************************/
1116 1659
1117static void 1660static void
1118transfer_check (pTHX_ struct coro *prev, struct coro *next) 1661transfer_check (pTHX_ struct coro *prev, struct coro *next)
1119{ 1662{
1663 /* TODO: throwing up here is considered harmful */
1664
1120 if (expect_true (prev != next)) 1665 if (ecb_expect_true (prev != next))
1121 { 1666 {
1122 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1667 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1123 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1668 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1124 1669
1125 if (expect_false (next->flags & CF_RUNNING)) 1670 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1126 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1127
1128 if (expect_false (next->flags & CF_DESTROYED))
1129 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1671 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1130 1672
1131 if (
1132#if PERL_VERSION_ATLEAST (5,9,0) 1673#if !PERL_VERSION_ATLEAST (5,10,0)
1133 expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
1134#else
1135 expect_false (PL_lex_state != LEX_NOTPARSING) 1674 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1136#endif
1137 )
1138 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1675 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1676#endif
1139 } 1677 }
1140} 1678}
1141 1679
1142/* always use the TRANSFER macro */ 1680/* always use the TRANSFER macro */
1143static void NOINLINE 1681static void ecb_noinline /* noinline so we have a fixed stackframe */
1144transfer (pTHX_ struct coro *prev, struct coro *next) 1682transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1145{ 1683{
1146 dSTACKLEVEL; 1684 dSTACKLEVEL;
1147 static volatile int has_throw;
1148 1685
1149 /* sometimes transfer is only called to set idle_sp */ 1686 /* sometimes transfer is only called to set idle_sp */
1150 if (expect_false (!next)) 1687 if (ecb_expect_false (!prev))
1151 { 1688 {
1152 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1689 cctx_current->idle_sp = STACKLEVEL;
1153 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1690 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1154 } 1691 }
1155 else if (expect_true (prev != next)) 1692 else if (ecb_expect_true (prev != next))
1156 { 1693 {
1157 coro_cctx *prev__cctx; 1694 coro_cctx *cctx_prev;
1158 1695
1159 if (expect_false (prev->flags & CF_NEW)) 1696 if (ecb_expect_false (prev->flags & CF_NEW))
1160 { 1697 {
1161 /* create a new empty context */ 1698 /* create a new empty/source context */
1162 Newz (0, prev->cctx, 1, coro_cctx);
1163 prev->flags &= ~CF_NEW; 1699 prev->flags &= ~CF_NEW;
1164 prev->flags |= CF_RUNNING; 1700 prev->flags |= CF_RUNNING;
1165 } 1701 }
1166 1702
1167 prev->flags &= ~CF_RUNNING; 1703 prev->flags &= ~CF_RUNNING;
1168 next->flags |= CF_RUNNING; 1704 next->flags |= CF_RUNNING;
1169 1705
1170 LOCK;
1171
1172 /* first get rid of the old state */ 1706 /* first get rid of the old state */
1173 save_perl (aTHX_ prev); 1707 save_perl (aTHX_ prev);
1174 1708
1175 if (expect_false (next->flags & CF_NEW)) 1709 if (ecb_expect_false (next->flags & CF_NEW))
1176 { 1710 {
1177 /* need to start coroutine */ 1711 /* need to start coroutine */
1178 next->flags &= ~CF_NEW; 1712 next->flags &= ~CF_NEW;
1179 /* setup coroutine call */ 1713 /* setup coroutine call */
1180 coro_setup (aTHX_ next); 1714 init_perl (aTHX_ next);
1181 } 1715 }
1182 else 1716 else
1183 load_perl (aTHX_ next); 1717 load_perl (aTHX_ next);
1184 1718
1185 prev__cctx = prev->cctx;
1186
1187 /* possibly "free" the cctx */ 1719 /* possibly untie and reuse the cctx */
1188 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1720 if (ecb_expect_true (
1721 cctx_current->idle_sp == STACKLEVEL
1722 && !(cctx_current->flags & CC_TRACE)
1723 && !force_cctx
1724 ))
1189 { 1725 {
1190 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1726 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1191 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1727 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1192 1728
1193 prev->cctx = 0;
1194
1195 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1729 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1196 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1730 /* without this the next cctx_get might destroy the running cctx while still in use */
1197 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1731 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1198 if (!next->cctx) 1732 if (ecb_expect_true (!next->cctx))
1199 next->cctx = cctx_get (aTHX); 1733 next->cctx = cctx_get (aTHX);
1200 1734
1201 cctx_put (prev__cctx); 1735 cctx_put (cctx_current);
1202 } 1736 }
1737 else
1738 prev->cctx = cctx_current;
1203 1739
1204 ++next->usecount; 1740 ++next->usecount;
1205 1741
1206 if (expect_true (!next->cctx)) 1742 cctx_prev = cctx_current;
1207 next->cctx = cctx_get (aTHX); 1743 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1208 1744
1209 has_throw = !!next->throw; 1745 next->cctx = 0;
1210 1746
1211 if (expect_false (prev__cctx != next->cctx)) 1747 if (ecb_expect_false (cctx_prev != cctx_current))
1212 { 1748 {
1213 prev__cctx->top_env = PL_top_env; 1749 cctx_prev->top_env = PL_top_env;
1214 PL_top_env = next->cctx->top_env; 1750 PL_top_env = cctx_current->top_env;
1215 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1751 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1216 } 1752 }
1217 1753
1218 free_coro_mortal (aTHX); 1754 transfer_tail (aTHX);
1219 UNLOCK;
1220
1221 if (expect_false (has_throw))
1222 {
1223 struct coro *coro = SvSTATE (coro_current);
1224
1225 if (coro->throw)
1226 {
1227 SV *exception = coro->throw;
1228 coro->throw = 0;
1229 sv_setsv (ERRSV, exception);
1230 croak (0);
1231 }
1232 }
1233 } 1755 }
1234} 1756}
1235 1757
1236struct transfer_args
1237{
1238 struct coro *prev, *next;
1239};
1240
1241#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1758#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1242#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1759#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1243 1760
1244/** high level stuff ********************************************************/ 1761/** high level stuff ********************************************************/
1245 1762
1763/* this function is actually Coro, not Coro::State, but we call it from here */
1764/* because it is convenient - but it hasn't been declared yet for that reason */
1246static int 1765static void
1766coro_call_on_destroy (pTHX_ struct coro *coro);
1767
1768static void
1247coro_state_destroy (pTHX_ struct coro *coro) 1769coro_state_destroy (pTHX_ struct coro *coro)
1248{ 1770{
1249 if (coro->flags & CF_DESTROYED) 1771 if (coro->flags & CF_ZOMBIE)
1250 return 0; 1772 return;
1251 1773
1774 slf_destroy (aTHX_ coro);
1775
1252 coro->flags |= CF_DESTROYED; 1776 coro->flags |= CF_ZOMBIE;
1253 1777
1254 if (coro->flags & CF_READY) 1778 if (coro->flags & CF_READY)
1255 { 1779 {
1256 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1780 /* reduce nready, as destroying a ready coro effectively unreadies it */
1257 /* alternative: look through all ready queues and remove the coro */ 1781 /* alternative: look through all ready queues and remove the coro */
1258 LOCK;
1259 --coro_nready; 1782 --coro_nready;
1260 UNLOCK;
1261 } 1783 }
1262 else 1784 else
1263 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1785 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1264
1265 if (coro->mainstack && coro->mainstack != main_mainstack)
1266 {
1267 struct coro temp;
1268
1269 if (coro->flags & CF_RUNNING)
1270 croak ("FATAL: tried to destroy currently running coroutine");
1271
1272 save_perl (aTHX_ &temp);
1273 load_perl (aTHX_ coro);
1274
1275 coro_destroy (aTHX_ coro);
1276
1277 load_perl (aTHX_ &temp);
1278
1279 coro->slot = 0;
1280 }
1281
1282 cctx_destroy (coro->cctx);
1283 SvREFCNT_dec (coro->args);
1284 1786
1285 if (coro->next) coro->next->prev = coro->prev; 1787 if (coro->next) coro->next->prev = coro->prev;
1286 if (coro->prev) coro->prev->next = coro->next; 1788 if (coro->prev) coro->prev->next = coro->next;
1287 if (coro == coro_first) coro_first = coro->next; 1789 if (coro == coro_first) coro_first = coro->next;
1288 1790
1289 return 1; 1791 if (coro->mainstack
1792 && coro->mainstack != main_mainstack
1793 && coro->slot
1794 && !PL_dirty)
1795 destroy_perl (aTHX_ coro);
1796
1797 cctx_destroy (coro->cctx);
1798 SvREFCNT_dec (coro->startcv);
1799 SvREFCNT_dec (coro->args);
1800 SvREFCNT_dec (coro->swap_sv);
1801 SvREFCNT_dec (CORO_THROW);
1802
1803 coro_call_on_destroy (aTHX_ coro);
1804
1805 /* more destruction mayhem in coro_state_free */
1290} 1806}
1291 1807
1292static int 1808static int
1293coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1809coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1294{ 1810{
1295 struct coro *coro = (struct coro *)mg->mg_ptr; 1811 struct coro *coro = (struct coro *)mg->mg_ptr;
1296 mg->mg_ptr = 0; 1812 mg->mg_ptr = 0;
1297 1813
1298 coro->hv = 0;
1299
1300 if (--coro->refcnt < 0)
1301 {
1302 coro_state_destroy (aTHX_ coro); 1814 coro_state_destroy (aTHX_ coro);
1815 SvREFCNT_dec (coro->on_destroy);
1816 SvREFCNT_dec (coro->status);
1817
1303 Safefree (coro); 1818 Safefree (coro);
1304 }
1305 1819
1306 return 0; 1820 return 0;
1307} 1821}
1308 1822
1309static int 1823static int ecb_cold
1310coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1824coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1311{ 1825{
1312 struct coro *coro = (struct coro *)mg->mg_ptr; 1826 /* called when perl clones the current process the slow way (windows process emulation) */
1313 1827 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1314 ++coro->refcnt; 1828 mg->mg_ptr = 0;
1829 mg->mg_virtual = 0;
1315 1830
1316 return 0; 1831 return 0;
1317} 1832}
1318 1833
1319static MGVTBL coro_state_vtbl = { 1834static MGVTBL coro_state_vtbl = {
… …
1326# define MGf_DUP 0 1841# define MGf_DUP 0
1327#endif 1842#endif
1328}; 1843};
1329 1844
1330static void 1845static void
1331prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1846prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1332{ 1847{
1333 ta->prev = SvSTATE (prev_sv); 1848 ta->prev = SvSTATE (prev_sv);
1334 ta->next = SvSTATE (next_sv); 1849 ta->next = SvSTATE (next_sv);
1335 TRANSFER_CHECK (*ta); 1850 TRANSFER_CHECK (*ta);
1336} 1851}
1337 1852
1338static void 1853static void
1339api_transfer (SV *prev_sv, SV *next_sv) 1854api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1855{
1856 struct coro_transfer_args ta;
1857
1858 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1859 TRANSFER (ta, 1);
1860}
1861
1862/** Coro ********************************************************************/
1863
1864ecb_inline void
1865coro_enq (pTHX_ struct coro *coro)
1866{
1867 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1868
1869 SvREFCNT_inc_NN (coro->hv);
1870
1871 coro->next_ready = 0;
1872 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1873 ready [1] = coro;
1874}
1875
1876ecb_inline struct coro *
1877coro_deq (pTHX)
1878{
1879 int prio;
1880
1881 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1882 {
1883 struct coro **ready = coro_ready [prio];
1884
1885 if (ready [0])
1886 {
1887 struct coro *coro = ready [0];
1888 ready [0] = coro->next_ready;
1889 return coro;
1890 }
1891 }
1892
1893 return 0;
1894}
1895
1896static void
1897invoke_sv_ready_hook_helper (void)
1340{ 1898{
1341 dTHX; 1899 dTHX;
1342 struct transfer_args ta; 1900 dSP;
1343 1901
1344 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1902 ENTER;
1345 TRANSFER (ta); 1903 SAVETMPS;
1346}
1347 1904
1348/** Coro ********************************************************************/ 1905 PUSHMARK (SP);
1906 PUTBACK;
1907 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1349 1908
1350static void 1909 FREETMPS;
1351coro_enq (pTHX_ SV *coro_sv) 1910 LEAVE;
1352{
1353 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1354}
1355
1356static SV *
1357coro_deq (pTHX)
1358{
1359 int prio;
1360
1361 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1362 if (AvFILLp (coro_ready [prio]) >= 0)
1363 return av_shift (coro_ready [prio]);
1364
1365 return 0;
1366} 1911}
1367 1912
1368static int 1913static int
1369api_ready (SV *coro_sv) 1914api_ready (pTHX_ SV *coro_sv)
1370{ 1915{
1371 dTHX;
1372 struct coro *coro;
1373
1374 if (SvROK (coro_sv))
1375 coro_sv = SvRV (coro_sv);
1376
1377 coro = SvSTATE (coro_sv); 1916 struct coro *coro = SvSTATE (coro_sv);
1378 1917
1379 if (coro->flags & CF_READY) 1918 if (coro->flags & CF_READY)
1380 return 0; 1919 return 0;
1381 1920
1382 coro->flags |= CF_READY; 1921 coro->flags |= CF_READY;
1383 1922
1384 LOCK; 1923 coro_enq (aTHX_ coro);
1385 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1924
1386 ++coro_nready; 1925 if (!coro_nready++)
1387 UNLOCK; 1926 if (coroapi.readyhook)
1927 coroapi.readyhook ();
1388 1928
1389 return 1; 1929 return 1;
1390} 1930}
1391 1931
1392static int 1932static int
1393api_is_ready (SV *coro_sv) 1933api_is_ready (pTHX_ SV *coro_sv)
1394{ 1934{
1395 dTHX;
1396 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1935 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1397} 1936}
1398 1937
1399static void 1938/* expects to own a reference to next->hv */
1939ecb_inline void
1400prepare_schedule (pTHX_ struct transfer_args *ta) 1940prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1401{ 1941{
1402 SV *prev_sv, *next_sv;
1403
1404 for (;;)
1405 {
1406 LOCK;
1407 next_sv = coro_deq (aTHX);
1408
1409 /* nothing to schedule: call the idle handler */
1410 if (expect_false (!next_sv))
1411 {
1412 dSP;
1413 UNLOCK;
1414
1415 ENTER;
1416 SAVETMPS;
1417
1418 PUSHMARK (SP);
1419 PUTBACK;
1420 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1421 SPAGAIN;
1422
1423 FREETMPS;
1424 LEAVE;
1425 continue;
1426 }
1427
1428 ta->next = SvSTATE (next_sv);
1429
1430 /* cannot transfer to destroyed coros, skip and look for next */
1431 if (expect_false (ta->next->flags & CF_DESTROYED))
1432 {
1433 UNLOCK;
1434 SvREFCNT_dec (next_sv);
1435 /* coro_nready is already taken care of by destroy */
1436 continue;
1437 }
1438
1439 --coro_nready;
1440 UNLOCK;
1441 break;
1442 }
1443
1444 /* free this only after the transfer */
1445 prev_sv = SvRV (coro_current); 1942 SV *prev_sv = SvRV (coro_current);
1943
1446 ta->prev = SvSTATE (prev_sv); 1944 ta->prev = SvSTATE_hv (prev_sv);
1945 ta->next = next;
1946
1447 TRANSFER_CHECK (*ta); 1947 TRANSFER_CHECK (*ta);
1448 assert (ta->next->flags & CF_READY); 1948
1449 ta->next->flags &= ~CF_READY;
1450 SvRV_set (coro_current, next_sv); 1949 SvRV_set (coro_current, (SV *)next->hv);
1451 1950
1452 LOCK;
1453 free_coro_mortal (aTHX); 1951 free_coro_mortal (aTHX);
1454 coro_mortal = prev_sv; 1952 coro_mortal = prev_sv;
1455 UNLOCK;
1456} 1953}
1457 1954
1458static void 1955static void
1956prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1957{
1958 for (;;)
1959 {
1960 struct coro *next = coro_deq (aTHX);
1961
1962 if (ecb_expect_true (next))
1963 {
1964 /* cannot transfer to destroyed coros, skip and look for next */
1965 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1966 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1967 else
1968 {
1969 next->flags &= ~CF_READY;
1970 --coro_nready;
1971
1972 prepare_schedule_to (aTHX_ ta, next);
1973 break;
1974 }
1975 }
1976 else
1977 {
1978 /* nothing to schedule: call the idle handler */
1979 if (SvROK (sv_idle)
1980 && SvOBJECT (SvRV (sv_idle)))
1981 {
1982 if (SvRV (sv_idle) == SvRV (coro_current))
1983 {
1984 require_pv ("Carp");
1985
1986 {
1987 dSP;
1988
1989 ENTER;
1990 SAVETMPS;
1991
1992 PUSHMARK (SP);
1993 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1994 PUTBACK;
1995 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1996
1997 FREETMPS;
1998 LEAVE;
1999 }
2000 }
2001
2002 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2003 api_ready (aTHX_ SvRV (sv_idle));
2004 --coro_nready;
2005 }
2006 else
2007 {
2008 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2009 dSP;
2010
2011 ENTER;
2012 SAVETMPS;
2013
2014 PUSHMARK (SP);
2015 PUTBACK;
2016 call_sv (sv_idle, G_VOID | G_DISCARD);
2017
2018 FREETMPS;
2019 LEAVE;
2020 }
2021 }
2022 }
2023}
2024
2025ecb_inline void
1459prepare_cede (pTHX_ struct transfer_args *ta) 2026prepare_cede (pTHX_ struct coro_transfer_args *ta)
1460{ 2027{
1461 api_ready (coro_current); 2028 api_ready (aTHX_ coro_current);
1462 prepare_schedule (aTHX_ ta); 2029 prepare_schedule (aTHX_ ta);
1463} 2030}
1464 2031
2032ecb_inline void
2033prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2034{
2035 SV *prev = SvRV (coro_current);
2036
2037 if (coro_nready)
2038 {
2039 prepare_schedule (aTHX_ ta);
2040 api_ready (aTHX_ prev);
2041 }
2042 else
2043 prepare_nop (aTHX_ ta);
2044}
2045
2046static void
2047api_schedule (pTHX)
2048{
2049 struct coro_transfer_args ta;
2050
2051 prepare_schedule (aTHX_ &ta);
2052 TRANSFER (ta, 1);
2053}
2054
2055static void
2056api_schedule_to (pTHX_ SV *coro_sv)
2057{
2058 struct coro_transfer_args ta;
2059 struct coro *next = SvSTATE (coro_sv);
2060
2061 SvREFCNT_inc_NN (coro_sv);
2062 prepare_schedule_to (aTHX_ &ta, next);
2063}
2064
1465static int 2065static int
1466prepare_cede_notself (pTHX_ struct transfer_args *ta) 2066api_cede (pTHX)
1467{ 2067{
1468 if (coro_nready) 2068 struct coro_transfer_args ta;
1469 { 2069
1470 SV *prev = SvRV (coro_current);
1471 prepare_schedule (aTHX_ ta); 2070 prepare_cede (aTHX_ &ta);
1472 api_ready (prev); 2071
2072 if (ecb_expect_true (ta.prev != ta.next))
2073 {
2074 TRANSFER (ta, 1);
1473 return 1; 2075 return 1;
1474 } 2076 }
1475 else 2077 else
1476 return 0; 2078 return 0;
1477} 2079}
1478 2080
1479static void
1480api_schedule (void)
1481{
1482 dTHX;
1483 struct transfer_args ta;
1484
1485 prepare_schedule (aTHX_ &ta);
1486 TRANSFER (ta);
1487}
1488
1489static int 2081static int
1490api_cede (void) 2082api_cede_notself (pTHX)
1491{ 2083{
1492 dTHX; 2084 if (coro_nready)
2085 {
1493 struct transfer_args ta; 2086 struct coro_transfer_args ta;
1494 2087
1495 prepare_cede (aTHX_ &ta); 2088 prepare_cede_notself (aTHX_ &ta);
1496
1497 if (expect_true (ta.prev != ta.next))
1498 {
1499 TRANSFER (ta); 2089 TRANSFER (ta, 1);
1500 return 1; 2090 return 1;
1501 } 2091 }
1502 else 2092 else
1503 return 0; 2093 return 0;
1504} 2094}
1505 2095
1506static int 2096static void
1507api_cede_notself (void)
1508{
1509 dTHX;
1510 struct transfer_args ta;
1511
1512 if (prepare_cede_notself (aTHX_ &ta))
1513 {
1514 TRANSFER (ta);
1515 return 1;
1516 }
1517 else
1518 return 0;
1519}
1520
1521static void
1522api_trace (SV *coro_sv, int flags) 2097api_trace (pTHX_ SV *coro_sv, int flags)
1523{ 2098{
1524 dTHX;
1525 struct coro *coro = SvSTATE (coro_sv); 2099 struct coro *coro = SvSTATE (coro_sv);
1526 2100
2101 if (coro->flags & CF_RUNNING)
2102 croak ("cannot enable tracing on a running coroutine, caught");
2103
1527 if (flags & CC_TRACE) 2104 if (flags & CC_TRACE)
1528 { 2105 {
1529 if (!coro->cctx) 2106 if (!coro->cctx)
1530 coro->cctx = cctx_new (); 2107 coro->cctx = cctx_new_run ();
1531 else if (!(coro->cctx->flags & CC_TRACE)) 2108 else if (!(coro->cctx->flags & CC_TRACE))
1532 croak ("cannot enable tracing on coroutine with custom stack"); 2109 croak ("cannot enable tracing on coroutine with custom stack, caught");
1533 2110
1534 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2111 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1535 } 2112 }
1536 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2113 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1537 { 2114 {
… …
1542 else 2119 else
1543 coro->slot->runops = RUNOPS_DEFAULT; 2120 coro->slot->runops = RUNOPS_DEFAULT;
1544 } 2121 }
1545} 2122}
1546 2123
2124static void
2125coro_push_av (pTHX_ AV *av, I32 gimme_v)
2126{
2127 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2128 {
2129 dSP;
2130
2131 if (gimme_v == G_SCALAR)
2132 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2133 else
2134 {
2135 int i;
2136 EXTEND (SP, AvFILLp (av) + 1);
2137
2138 for (i = 0; i <= AvFILLp (av); ++i)
2139 PUSHs (AvARRAY (av)[i]);
2140 }
2141
2142 PUTBACK;
2143 }
2144}
2145
2146static void
2147coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2148{
2149 if (!coro->on_destroy)
2150 coro->on_destroy = newAV ();
2151
2152 av_push (coro->on_destroy, cb);
2153}
2154
2155static void
2156slf_destroy_join (pTHX_ struct CoroSLF *frame)
2157{
2158 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2159}
2160
2161static int
2162slf_check_join (pTHX_ struct CoroSLF *frame)
2163{
2164 struct coro *coro = (struct coro *)frame->data;
2165
2166 if (!coro->status)
2167 return 1;
2168
2169 frame->destroy = 0;
2170
2171 coro_push_av (aTHX_ coro->status, GIMME_V);
2172
2173 SvREFCNT_dec ((SV *)coro->hv);
2174
2175 return 0;
2176}
2177
2178static void
2179slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2182
2183 if (items > 1)
2184 croak ("join called with too many arguments");
2185
2186 if (coro->status)
2187 frame->prepare = prepare_nop;
2188 else
2189 {
2190 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2191 frame->prepare = prepare_schedule;
2192 }
2193
2194 frame->check = slf_check_join;
2195 frame->destroy = slf_destroy_join;
2196 frame->data = (void *)coro;
2197 SvREFCNT_inc (coro->hv);
2198}
2199
2200static void
2201coro_call_on_destroy (pTHX_ struct coro *coro)
2202{
2203 AV *od = coro->on_destroy;
2204
2205 if (!od)
2206 return;
2207
2208 coro->on_destroy = 0;
2209 sv_2mortal ((SV *)od);
2210
2211 while (AvFILLp (od) >= 0)
2212 {
2213 SV *cb = sv_2mortal (av_pop (od));
2214
2215 /* coro hv's (and only hv's at the moment) are supported as well */
2216 if (SvSTATEhv_p (aTHX_ cb))
2217 api_ready (aTHX_ cb);
2218 else
2219 {
2220 dSP; /* don't disturb outer sp */
2221 PUSHMARK (SP);
2222
2223 if (coro->status)
2224 {
2225 PUTBACK;
2226 coro_push_av (aTHX_ coro->status, G_ARRAY);
2227 SPAGAIN;
2228 }
2229
2230 PUTBACK;
2231 call_sv (cb, G_VOID | G_DISCARD);
2232 }
2233 }
2234}
2235
2236static void
2237coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2238{
2239 AV *av;
2240
2241 if (coro->status)
2242 {
2243 av = coro->status;
2244 av_clear (av);
2245 }
2246 else
2247 av = coro->status = newAV ();
2248
2249 /* items are actually not so common, so optimise for this case */
2250 if (items)
2251 {
2252 int i;
2253
2254 av_extend (av, items - 1);
2255
2256 for (i = 0; i < items; ++i)
2257 av_push (av, SvREFCNT_inc_NN (arg [i]));
2258 }
2259}
2260
2261static void
2262slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2263{
2264 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2265 api_ready (aTHX_ sv_manager);
2266
2267 frame->prepare = prepare_schedule;
2268 frame->check = slf_check_repeat;
2269
2270 /* as a minor optimisation, we could unwind all stacks here */
2271 /* but that puts extra pressure on pp_slf, and is not worth much */
2272 /*coro_unwind_stacks (aTHX);*/
2273}
2274
2275static void
2276slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2277{
2278 HV *coro_hv = (HV *)SvRV (coro_current);
2279
2280 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2281 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2282}
2283
2284static void
2285slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2286{
2287 HV *coro_hv;
2288 struct coro *coro;
2289
2290 if (items <= 0)
2291 croak ("Coro::cancel called without coro object,");
2292
2293 coro = SvSTATE (arg [0]);
2294 coro_hv = coro->hv;
2295
2296 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2297
2298 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2299 {
2300 /* coro currently busy cancelling something, so just notify it */
2301 coro->slf_frame.data = (void *)coro;
2302
2303 frame->prepare = prepare_nop;
2304 frame->check = slf_check_nop;
2305 }
2306 else if (coro_hv == (HV *)SvRV (coro_current))
2307 {
2308 /* cancelling the current coro is allowed, and equals terminate */
2309 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2310 }
2311 else
2312 {
2313 struct coro *self = SvSTATE_current;
2314
2315 if (!self)
2316 croak ("Coro::cancel called outside of thread content,");
2317
2318 /* otherwise we cancel directly, purely for speed reasons
2319 * unfortunately, this requires some magic trickery, as
2320 * somebody else could cancel us, so we have to fight the cancellation.
2321 * this is ugly, and hopefully fully worth the extra speed.
2322 * besides, I can't get the slow-but-safe version working...
2323 */
2324 slf_frame.data = 0;
2325 self->flags |= CF_NOCANCEL;
2326 coro_state_destroy (aTHX_ coro);
2327 self->flags &= ~CF_NOCANCEL;
2328
2329 if (slf_frame.data)
2330 {
2331 /* while we were busy we have been cancelled, so terminate */
2332 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2333 }
2334 else
2335 {
2336 frame->prepare = prepare_nop;
2337 frame->check = slf_check_nop;
2338 }
2339 }
2340}
2341
2342static int
2343slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2344{
2345 frame->prepare = 0;
2346 coro_unwind_stacks (aTHX);
2347
2348 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2349
2350 return 1;
2351}
2352
2353static int
2354safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2355{
2356 if (coro->cctx)
2357 croak ("coro inside C callback, unable to cancel at this time, caught");
2358
2359 if (coro->flags & CF_NEW)
2360 {
2361 coro_set_status (aTHX_ coro, arg, items);
2362 coro_state_destroy (aTHX_ coro);
2363 }
2364 else
2365 {
2366 if (!coro->slf_frame.prepare)
2367 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2368
2369 slf_destroy (aTHX_ coro);
2370
2371 coro_set_status (aTHX_ coro, arg, items);
2372 coro->slf_frame.prepare = prepare_nop;
2373 coro->slf_frame.check = slf_check_safe_cancel;
2374
2375 api_ready (aTHX_ (SV *)coro->hv);
2376 }
2377
2378 return 1;
2379}
2380
2381/*****************************************************************************/
2382/* async pool handler */
2383
2384static int
2385slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2386{
2387 HV *hv = (HV *)SvRV (coro_current);
2388 struct coro *coro = (struct coro *)frame->data;
2389
2390 if (!coro->invoke_cb)
2391 return 1; /* loop till we have invoke */
2392 else
2393 {
2394 hv_store (hv, "desc", sizeof ("desc") - 1,
2395 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2396
2397 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2398
2399 {
2400 dSP;
2401 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2402 PUTBACK;
2403 }
2404
2405 SvREFCNT_dec (GvAV (PL_defgv));
2406 GvAV (PL_defgv) = coro->invoke_av;
2407 coro->invoke_av = 0;
2408
2409 return 0;
2410 }
2411}
2412
2413static void
2414slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2415{
2416 HV *hv = (HV *)SvRV (coro_current);
2417 struct coro *coro = SvSTATE_hv ((SV *)hv);
2418
2419 if (ecb_expect_true (coro->saved_deffh))
2420 {
2421 /* subsequent iteration */
2422 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2423 coro->saved_deffh = 0;
2424
2425 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2426 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2427 {
2428 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2429 return;
2430 }
2431 else
2432 {
2433 av_clear (GvAV (PL_defgv));
2434 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2435
2436 if (ecb_expect_false (coro->swap_sv))
2437 {
2438 swap_svs_leave (coro);
2439 SvREFCNT_dec_NN (coro->swap_sv);
2440 coro->swap_sv = 0;
2441 }
2442
2443 coro->prio = 0;
2444
2445 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2446 api_trace (aTHX_ coro_current, 0);
2447
2448 frame->prepare = prepare_schedule;
2449 av_push (av_async_pool, SvREFCNT_inc (hv));
2450 }
2451 }
2452 else
2453 {
2454 /* first iteration, simply fall through */
2455 frame->prepare = prepare_nop;
2456 }
2457
2458 frame->check = slf_check_pool_handler;
2459 frame->data = (void *)coro;
2460}
2461
2462/*****************************************************************************/
2463/* rouse callback */
2464
2465#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2466
2467static void
2468coro_rouse_callback (pTHX_ CV *cv)
2469{
2470 dXSARGS;
2471 SV *data = (SV *)S_GENSUB_ARG;
2472
2473 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2474 {
2475 /* first call, set args */
2476 SV *coro = SvRV (data);
2477 AV *av = newAV ();
2478
2479 SvRV_set (data, (SV *)av);
2480
2481 /* better take a full copy of the arguments */
2482 while (items--)
2483 av_store (av, items, newSVsv (ST (items)));
2484
2485 api_ready (aTHX_ coro);
2486 SvREFCNT_dec (coro);
2487 }
2488
2489 XSRETURN_EMPTY;
2490}
2491
2492static int
2493slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2494{
2495 SV *data = (SV *)frame->data;
2496
2497 if (CORO_THROW)
2498 return 0;
2499
2500 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2501 return 1;
2502
2503 /* now push all results on the stack */
2504 {
2505 dSP;
2506 AV *av = (AV *)SvRV (data);
2507 int i;
2508
2509 EXTEND (SP, AvFILLp (av) + 1);
2510 for (i = 0; i <= AvFILLp (av); ++i)
2511 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2512
2513 /* we have stolen the elements, so set length to zero and free */
2514 AvFILLp (av) = -1;
2515 av_undef (av);
2516
2517 PUTBACK;
2518 }
2519
2520 return 0;
2521}
2522
2523static void
2524slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 SV *cb;
2527
2528 if (items)
2529 cb = arg [0];
2530 else
2531 {
2532 struct coro *coro = SvSTATE_current;
2533
2534 if (!coro->rouse_cb)
2535 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2536
2537 cb = sv_2mortal (coro->rouse_cb);
2538 coro->rouse_cb = 0;
2539 }
2540
2541 if (!SvROK (cb)
2542 || SvTYPE (SvRV (cb)) != SVt_PVCV
2543 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2544 croak ("Coro::rouse_wait called with illegal callback argument,");
2545
2546 {
2547 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2548 SV *data = (SV *)S_GENSUB_ARG;
2549
2550 frame->data = (void *)data;
2551 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2552 frame->check = slf_check_rouse_wait;
2553 }
2554}
2555
2556static SV *
2557coro_new_rouse_cb (pTHX)
2558{
2559 HV *hv = (HV *)SvRV (coro_current);
2560 struct coro *coro = SvSTATE_hv (hv);
2561 SV *data = newRV_inc ((SV *)hv);
2562 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2563
2564 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2565 SvREFCNT_dec (data); /* magicext increases the refcount */
2566
2567 SvREFCNT_dec (coro->rouse_cb);
2568 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2569
2570 return cb;
2571}
2572
2573/*****************************************************************************/
2574/* schedule-like-function opcode (SLF) */
2575
2576static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2577static const CV *slf_cv;
2578static SV **slf_argv;
2579static int slf_argc, slf_arga; /* count, allocated */
2580static I32 slf_ax; /* top of stack, for restore */
2581
2582/* this restores the stack in the case we patched the entersub, to */
2583/* recreate the stack frame as perl will on following calls */
2584/* since entersub cleared the stack */
2585static OP *
2586pp_restore (pTHX)
2587{
2588 int i;
2589 SV **SP = PL_stack_base + slf_ax;
2590
2591 PUSHMARK (SP);
2592
2593 EXTEND (SP, slf_argc + 1);
2594
2595 for (i = 0; i < slf_argc; ++i)
2596 PUSHs (sv_2mortal (slf_argv [i]));
2597
2598 PUSHs ((SV *)CvGV (slf_cv));
2599
2600 RETURNOP (slf_restore.op_first);
2601}
2602
2603static void
2604slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2605{
2606 SV **arg = (SV **)slf_frame.data;
2607
2608 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2609}
2610
2611static void
2612slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 if (items != 2)
2615 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2616
2617 frame->prepare = slf_prepare_transfer;
2618 frame->check = slf_check_nop;
2619 frame->data = (void *)arg; /* let's hope it will stay valid */
2620}
2621
2622static void
2623slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2624{
2625 frame->prepare = prepare_schedule;
2626 frame->check = slf_check_nop;
2627}
2628
2629static void
2630slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2631{
2632 struct coro *next = (struct coro *)slf_frame.data;
2633
2634 SvREFCNT_inc_NN (next->hv);
2635 prepare_schedule_to (aTHX_ ta, next);
2636}
2637
2638static void
2639slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 if (!items)
2642 croak ("Coro::schedule_to expects a coroutine argument, caught");
2643
2644 frame->data = (void *)SvSTATE (arg [0]);
2645 frame->prepare = slf_prepare_schedule_to;
2646 frame->check = slf_check_nop;
2647}
2648
2649static void
2650slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2651{
2652 api_ready (aTHX_ SvRV (coro_current));
2653
2654 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2655}
2656
2657static void
2658slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 frame->prepare = prepare_cede;
2661 frame->check = slf_check_nop;
2662}
2663
2664static void
2665slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 frame->prepare = prepare_cede_notself;
2668 frame->check = slf_check_nop;
2669}
2670
2671/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2672static void
2673slf_destroy (pTHX_ struct coro *coro)
2674{
2675 struct CoroSLF frame = coro->slf_frame;
2676
2677 /*
2678 * The on_destroy below most likely is from an SLF call.
2679 * Since by definition the SLF call will not finish when we destroy
2680 * the coro, we will have to force-finish it here, otherwise
2681 * cleanup functions cannot call SLF functions.
2682 */
2683 coro->slf_frame.prepare = 0;
2684
2685 /* this callback is reserved for slf functions needing to do cleanup */
2686 if (frame.destroy && frame.prepare && !PL_dirty)
2687 frame.destroy (aTHX_ &frame);
2688}
2689
2690/*
2691 * these not obviously related functions are all rolled into one
2692 * function to increase chances that they all will call transfer with the same
2693 * stack offset
2694 * SLF stands for "schedule-like-function".
2695 */
2696static OP *
2697pp_slf (pTHX)
2698{
2699 I32 checkmark; /* mark SP to see how many elements check has pushed */
2700
2701 /* set up the slf frame, unless it has already been set-up */
2702 /* the latter happens when a new coro has been started */
2703 /* or when a new cctx was attached to an existing coroutine */
2704 if (ecb_expect_true (!slf_frame.prepare))
2705 {
2706 /* first iteration */
2707 dSP;
2708 SV **arg = PL_stack_base + TOPMARK + 1;
2709 int items = SP - arg; /* args without function object */
2710 SV *gv = *sp;
2711
2712 /* do a quick consistency check on the "function" object, and if it isn't */
2713 /* for us, divert to the real entersub */
2714 if (SvTYPE (gv) != SVt_PVGV
2715 || !GvCV (gv)
2716 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2717 return PL_ppaddr[OP_ENTERSUB](aTHX);
2718
2719 if (!(PL_op->op_flags & OPf_STACKED))
2720 {
2721 /* ampersand-form of call, use @_ instead of stack */
2722 AV *av = GvAV (PL_defgv);
2723 arg = AvARRAY (av);
2724 items = AvFILLp (av) + 1;
2725 }
2726
2727 /* now call the init function, which needs to set up slf_frame */
2728 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2729 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2730
2731 /* pop args */
2732 SP = PL_stack_base + POPMARK;
2733
2734 PUTBACK;
2735 }
2736
2737 /* now that we have a slf_frame, interpret it! */
2738 /* we use a callback system not to make the code needlessly */
2739 /* complicated, but so we can run multiple perl coros from one cctx */
2740
2741 do
2742 {
2743 struct coro_transfer_args ta;
2744
2745 slf_frame.prepare (aTHX_ &ta);
2746 TRANSFER (ta, 0);
2747
2748 checkmark = PL_stack_sp - PL_stack_base;
2749 }
2750 while (slf_frame.check (aTHX_ &slf_frame));
2751
2752 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2753
2754 /* exception handling */
2755 if (ecb_expect_false (CORO_THROW))
2756 {
2757 SV *exception = sv_2mortal (CORO_THROW);
2758
2759 CORO_THROW = 0;
2760 sv_setsv (ERRSV, exception);
2761 croak (0);
2762 }
2763
2764 /* return value handling - mostly like entersub */
2765 /* make sure we put something on the stack in scalar context */
2766 if (GIMME_V == G_SCALAR
2767 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2768 {
2769 dSP;
2770 SV **bot = PL_stack_base + checkmark;
2771
2772 if (sp == bot) /* too few, push undef */
2773 bot [1] = &PL_sv_undef;
2774 else /* too many, take last one */
2775 bot [1] = *sp;
2776
2777 SP = bot + 1;
2778
2779 PUTBACK;
2780 }
2781
2782 return NORMAL;
2783}
2784
2785static void
2786api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2787{
2788 int i;
2789 SV **arg = PL_stack_base + ax;
2790 int items = PL_stack_sp - arg + 1;
2791
2792 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2793
2794 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2795 && PL_op->op_ppaddr != pp_slf)
2796 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2797
2798 CvFLAGS (cv) |= CVf_SLF;
2799 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2800 slf_cv = cv;
2801
2802 /* we patch the op, and then re-run the whole call */
2803 /* we have to put the same argument on the stack for this to work */
2804 /* and this will be done by pp_restore */
2805 slf_restore.op_next = (OP *)&slf_restore;
2806 slf_restore.op_type = OP_CUSTOM;
2807 slf_restore.op_ppaddr = pp_restore;
2808 slf_restore.op_first = PL_op;
2809
2810 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2811
2812 if (PL_op->op_flags & OPf_STACKED)
2813 {
2814 if (items > slf_arga)
2815 {
2816 slf_arga = items;
2817 Safefree (slf_argv);
2818 New (0, slf_argv, slf_arga, SV *);
2819 }
2820
2821 slf_argc = items;
2822
2823 for (i = 0; i < items; ++i)
2824 slf_argv [i] = SvREFCNT_inc (arg [i]);
2825 }
2826 else
2827 slf_argc = 0;
2828
2829 PL_op->op_ppaddr = pp_slf;
2830 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2831
2832 PL_op = (OP *)&slf_restore;
2833}
2834
2835/*****************************************************************************/
2836/* dynamic wind */
2837
2838static void
2839on_enterleave_call (pTHX_ SV *cb)
2840{
2841 dSP;
2842
2843 PUSHSTACK;
2844
2845 PUSHMARK (SP);
2846 PUTBACK;
2847 call_sv (cb, G_VOID | G_DISCARD);
2848 SPAGAIN;
2849
2850 POPSTACK;
2851}
2852
2853static SV *
2854coro_avp_pop_and_free (pTHX_ AV **avp)
2855{
2856 AV *av = *avp;
2857 SV *res = av_pop (av);
2858
2859 if (AvFILLp (av) < 0)
2860 {
2861 *avp = 0;
2862 SvREFCNT_dec (av);
2863 }
2864
2865 return res;
2866}
2867
2868static void
2869coro_pop_on_enter (pTHX_ void *coro)
2870{
2871 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2872 SvREFCNT_dec (cb);
2873}
2874
2875static void
2876coro_pop_on_leave (pTHX_ void *coro)
2877{
2878 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2879 on_enterleave_call (aTHX_ sv_2mortal (cb));
2880}
2881
2882static void
2883enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2884{
2885 if (!hook)
2886 return;
2887
2888 if (!*avp)
2889 {
2890 *avp = newAV ();
2891 AvREAL_off (*avp);
2892 }
2893
2894 av_push (*avp, (SV *)hook);
2895 av_push (*avp, (SV *)arg);
2896}
2897
2898static void
2899enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2900{
2901 AV *av = *avp;
2902 int i;
2903
2904 if (!av)
2905 return;
2906
2907 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2908 if (AvARRAY (av)[i] == (SV *)hook)
2909 {
2910 if (execute)
2911 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2912
2913 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2914 av_pop (av);
2915 av_pop (av);
2916 break;
2917 }
2918
2919 if (AvFILLp (av) >= 0)
2920 {
2921 *avp = 0;
2922 SvREFCNT_dec_NN (av);
2923 }
2924}
2925
2926static void
2927api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2928{
2929 struct coro *coro = SvSTATE (coro_sv);
2930
2931 if (SvSTATE_current == coro)
2932 if (enter)
2933 enter (aTHX_ enter_arg);
2934
2935 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2936 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2937}
2938
2939static void
2940api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2941{
2942 struct coro *coro = SvSTATE (coro_sv);
2943
2944 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2945 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2946}
2947
2948static void
2949savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2950{
2951 struct coro *coro = SvSTATE_current;
2952
2953 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2954}
2955
2956static void
2957savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2958{
2959 struct coro *coro = SvSTATE_current;
2960
2961 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2962}
2963
2964static void
2965api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2966{
2967 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2968
2969 /* this ought to be much cheaper than malloc + a single destructor call */
2970 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2971 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2972}
2973
2974/*****************************************************************************/
2975/* PerlIO::cede */
2976
2977typedef struct
2978{
2979 PerlIOBuf base;
2980 NV next, every;
2981} PerlIOCede;
2982
2983static IV ecb_cold
2984PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2985{
2986 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2987
2988 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2989 self->next = nvtime () + self->every;
2990
2991 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2992}
2993
2994static SV * ecb_cold
2995PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2996{
2997 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2998
2999 return newSVnv (self->every);
3000}
3001
3002static IV
3003PerlIOCede_flush (pTHX_ PerlIO *f)
3004{
3005 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3006 double now = nvtime ();
3007
3008 if (now >= self->next)
3009 {
3010 api_cede (aTHX);
3011 self->next = now + self->every;
3012 }
3013
3014 return PerlIOBuf_flush (aTHX_ f);
3015}
3016
3017static PerlIO_funcs PerlIO_cede =
3018{
3019 sizeof(PerlIO_funcs),
3020 "cede",
3021 sizeof(PerlIOCede),
3022 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3023 PerlIOCede_pushed,
3024 PerlIOBuf_popped,
3025 PerlIOBuf_open,
3026 PerlIOBase_binmode,
3027 PerlIOCede_getarg,
3028 PerlIOBase_fileno,
3029 PerlIOBuf_dup,
3030 PerlIOBuf_read,
3031 PerlIOBuf_unread,
3032 PerlIOBuf_write,
3033 PerlIOBuf_seek,
3034 PerlIOBuf_tell,
3035 PerlIOBuf_close,
3036 PerlIOCede_flush,
3037 PerlIOBuf_fill,
3038 PerlIOBase_eof,
3039 PerlIOBase_error,
3040 PerlIOBase_clearerr,
3041 PerlIOBase_setlinebuf,
3042 PerlIOBuf_get_base,
3043 PerlIOBuf_bufsiz,
3044 PerlIOBuf_get_ptr,
3045 PerlIOBuf_get_cnt,
3046 PerlIOBuf_set_ptrcnt,
3047};
3048
3049/*****************************************************************************/
3050/* Coro::Semaphore & Coro::Signal */
3051
3052static SV *
3053coro_waitarray_new (pTHX_ int count)
3054{
3055 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3056 AV *av = newAV ();
3057 SV **ary;
3058
3059 /* unfortunately, building manually saves memory */
3060 Newx (ary, 2, SV *);
3061 AvALLOC (av) = ary;
3062#if PERL_VERSION_ATLEAST (5,10,0)
3063 AvARRAY (av) = ary;
3064#else
3065 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3066 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3067 SvPVX ((SV *)av) = (char *)ary;
3068#endif
3069 AvMAX (av) = 1;
3070 AvFILLp (av) = 0;
3071 ary [0] = newSViv (count);
3072
3073 return newRV_noinc ((SV *)av);
3074}
3075
3076/* semaphore */
3077
3078static void
3079coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3080{
3081 SV *count_sv = AvARRAY (av)[0];
3082 IV count = SvIVX (count_sv);
3083
3084 count += adjust;
3085 SvIVX (count_sv) = count;
3086
3087 /* now wake up as many waiters as are expected to lock */
3088 while (count > 0 && AvFILLp (av) > 0)
3089 {
3090 SV *cb;
3091
3092 /* swap first two elements so we can shift a waiter */
3093 AvARRAY (av)[0] = AvARRAY (av)[1];
3094 AvARRAY (av)[1] = count_sv;
3095 cb = av_shift (av);
3096
3097 if (SvOBJECT (cb))
3098 {
3099 api_ready (aTHX_ cb);
3100 --count;
3101 }
3102 else if (SvTYPE (cb) == SVt_PVCV)
3103 {
3104 dSP;
3105 PUSHMARK (SP);
3106 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3107 PUTBACK;
3108 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3109 }
3110
3111 SvREFCNT_dec_NN (cb);
3112 }
3113}
3114
3115static void
3116coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3117{
3118 /* call $sem->adjust (0) to possibly wake up some other waiters */
3119 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3120}
3121
3122static int
3123slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3124{
3125 AV *av = (AV *)frame->data;
3126 SV *count_sv = AvARRAY (av)[0];
3127 SV *coro_hv = SvRV (coro_current);
3128
3129 frame->destroy = 0;
3130
3131 /* if we are about to throw, don't actually acquire the lock, just throw */
3132 if (ecb_expect_false (CORO_THROW))
3133 {
3134 /* we still might be responsible for the semaphore, so wake up others */
3135 coro_semaphore_adjust (aTHX_ av, 0);
3136
3137 return 0;
3138 }
3139 else if (SvIVX (count_sv) > 0)
3140 {
3141 if (acquire)
3142 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3143 else
3144 coro_semaphore_adjust (aTHX_ av, 0);
3145
3146 return 0;
3147 }
3148 else
3149 {
3150 int i;
3151 /* if we were woken up but can't down, we look through the whole */
3152 /* waiters list and only add us if we aren't in there already */
3153 /* this avoids some degenerate memory usage cases */
3154 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3155 if (AvARRAY (av)[i] == coro_hv)
3156 return 1;
3157
3158 av_push (av, SvREFCNT_inc (coro_hv));
3159 return 1;
3160 }
3161}
3162
3163static int
3164slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3165{
3166 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3167}
3168
3169static int
3170slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3171{
3172 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3173}
3174
3175static void
3176slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3177{
3178 AV *av = (AV *)SvRV (arg [0]);
3179
3180 if (SvIVX (AvARRAY (av)[0]) > 0)
3181 {
3182 frame->data = (void *)av;
3183 frame->prepare = prepare_nop;
3184 }
3185 else
3186 {
3187 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3188
3189 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3190 frame->prepare = prepare_schedule;
3191 /* to avoid race conditions when a woken-up coro gets terminated */
3192 /* we arrange for a temporary on_destroy that calls adjust (0) */
3193 frame->destroy = coro_semaphore_destroy;
3194 }
3195}
3196
3197static void
3198slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3199{
3200 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3201 frame->check = slf_check_semaphore_down;
3202}
3203
3204static void
3205slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3206{
3207 if (items >= 2)
3208 {
3209 /* callback form */
3210 AV *av = (AV *)SvRV (arg [0]);
3211 SV *cb_cv = s_get_cv_croak (arg [1]);
3212
3213 av_push (av, SvREFCNT_inc_NN (cb_cv));
3214
3215 if (SvIVX (AvARRAY (av)[0]) > 0)
3216 coro_semaphore_adjust (aTHX_ av, 0);
3217
3218 frame->prepare = prepare_nop;
3219 frame->check = slf_check_nop;
3220 }
3221 else
3222 {
3223 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3224 frame->check = slf_check_semaphore_wait;
3225 }
3226}
3227
3228/* signal */
3229
3230static void
3231coro_signal_wake (pTHX_ AV *av, int count)
3232{
3233 SvIVX (AvARRAY (av)[0]) = 0;
3234
3235 /* now signal count waiters */
3236 while (count > 0 && AvFILLp (av) > 0)
3237 {
3238 SV *cb;
3239
3240 /* swap first two elements so we can shift a waiter */
3241 cb = AvARRAY (av)[0];
3242 AvARRAY (av)[0] = AvARRAY (av)[1];
3243 AvARRAY (av)[1] = cb;
3244
3245 cb = av_shift (av);
3246
3247 if (SvTYPE (cb) == SVt_PVCV)
3248 {
3249 dSP;
3250 PUSHMARK (SP);
3251 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3252 PUTBACK;
3253 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3254 }
3255 else
3256 {
3257 api_ready (aTHX_ cb);
3258 sv_setiv (cb, 0); /* signal waiter */
3259 }
3260
3261 SvREFCNT_dec_NN (cb);
3262
3263 --count;
3264 }
3265}
3266
3267static int
3268slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3269{
3270 /* if we are about to throw, also stop waiting */
3271 return SvROK ((SV *)frame->data) && !CORO_THROW;
3272}
3273
3274static void
3275slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3276{
3277 AV *av = (AV *)SvRV (arg [0]);
3278
3279 if (items >= 2)
3280 {
3281 SV *cb_cv = s_get_cv_croak (arg [1]);
3282 av_push (av, SvREFCNT_inc_NN (cb_cv));
3283
3284 if (SvIVX (AvARRAY (av)[0]))
3285 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3286
3287 frame->prepare = prepare_nop;
3288 frame->check = slf_check_nop;
3289 }
3290 else if (SvIVX (AvARRAY (av)[0]))
3291 {
3292 SvIVX (AvARRAY (av)[0]) = 0;
3293 frame->prepare = prepare_nop;
3294 frame->check = slf_check_nop;
3295 }
3296 else
3297 {
3298 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3299
3300 av_push (av, waiter);
3301
3302 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3303 frame->prepare = prepare_schedule;
3304 frame->check = slf_check_signal_wait;
3305 }
3306}
3307
3308/*****************************************************************************/
3309/* Coro::AIO */
3310
3311#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3312
3313/* helper storage struct */
3314struct io_state
3315{
3316 int errorno;
3317 I32 laststype; /* U16 in 5.10.0 */
3318 int laststatval;
3319 Stat_t statcache;
3320};
3321
3322static void
3323coro_aio_callback (pTHX_ CV *cv)
3324{
3325 dXSARGS;
3326 AV *state = (AV *)S_GENSUB_ARG;
3327 SV *coro = av_pop (state);
3328 SV *data_sv = newSV (sizeof (struct io_state));
3329
3330 av_extend (state, items - 1);
3331
3332 sv_upgrade (data_sv, SVt_PV);
3333 SvCUR_set (data_sv, sizeof (struct io_state));
3334 SvPOK_only (data_sv);
3335
3336 {
3337 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3338
3339 data->errorno = errno;
3340 data->laststype = PL_laststype;
3341 data->laststatval = PL_laststatval;
3342 data->statcache = PL_statcache;
3343 }
3344
3345 /* now build the result vector out of all the parameters and the data_sv */
3346 {
3347 int i;
3348
3349 for (i = 0; i < items; ++i)
3350 av_push (state, SvREFCNT_inc_NN (ST (i)));
3351 }
3352
3353 av_push (state, data_sv);
3354
3355 api_ready (aTHX_ coro);
3356 SvREFCNT_dec_NN (coro);
3357 SvREFCNT_dec_NN ((AV *)state);
3358}
3359
3360static int
3361slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3362{
3363 AV *state = (AV *)frame->data;
3364
3365 /* if we are about to throw, return early */
3366 /* this does not cancel the aio request, but at least */
3367 /* it quickly returns */
3368 if (CORO_THROW)
3369 return 0;
3370
3371 /* one element that is an RV? repeat! */
3372 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3373 return 1;
3374
3375 /* restore status */
3376 {
3377 SV *data_sv = av_pop (state);
3378 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3379
3380 errno = data->errorno;
3381 PL_laststype = data->laststype;
3382 PL_laststatval = data->laststatval;
3383 PL_statcache = data->statcache;
3384
3385 SvREFCNT_dec_NN (data_sv);
3386 }
3387
3388 /* push result values */
3389 {
3390 dSP;
3391 int i;
3392
3393 EXTEND (SP, AvFILLp (state) + 1);
3394 for (i = 0; i <= AvFILLp (state); ++i)
3395 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3396
3397 PUTBACK;
3398 }
3399
3400 return 0;
3401}
3402
3403static void
3404slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3405{
3406 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3407 SV *coro_hv = SvRV (coro_current);
3408 struct coro *coro = SvSTATE_hv (coro_hv);
3409
3410 /* put our coroutine id on the state arg */
3411 av_push (state, SvREFCNT_inc_NN (coro_hv));
3412
3413 /* first see whether we have a non-zero priority and set it as AIO prio */
3414 if (coro->prio)
3415 {
3416 dSP;
3417
3418 static SV *prio_cv;
3419 static SV *prio_sv;
3420
3421 if (ecb_expect_false (!prio_cv))
3422 {
3423 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3424 prio_sv = newSViv (0);
3425 }
3426
3427 PUSHMARK (SP);
3428 sv_setiv (prio_sv, coro->prio);
3429 XPUSHs (prio_sv);
3430
3431 PUTBACK;
3432 call_sv (prio_cv, G_VOID | G_DISCARD);
3433 }
3434
3435 /* now call the original request */
3436 {
3437 dSP;
3438 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3439 int i;
3440
3441 PUSHMARK (SP);
3442
3443 /* first push all args to the stack */
3444 EXTEND (SP, items + 1);
3445
3446 for (i = 0; i < items; ++i)
3447 PUSHs (arg [i]);
3448
3449 /* now push the callback closure */
3450 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3451
3452 /* now call the AIO function - we assume our request is uncancelable */
3453 PUTBACK;
3454 call_sv ((SV *)req, G_VOID | G_DISCARD);
3455 }
3456
3457 /* now that the request is going, we loop till we have a result */
3458 frame->data = (void *)state;
3459 frame->prepare = prepare_schedule;
3460 frame->check = slf_check_aio_req;
3461}
3462
3463static void
3464coro_aio_req_xs (pTHX_ CV *cv)
3465{
3466 dXSARGS;
3467
3468 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3469
3470 XSRETURN_EMPTY;
3471}
3472
3473/*****************************************************************************/
3474
3475#if CORO_CLONE
3476# include "clone.c"
3477#endif
3478
3479/*****************************************************************************/
3480
3481static SV *
3482coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3483{
3484 SV *coro_sv;
3485 struct coro *coro;
3486 MAGIC *mg;
3487 HV *hv;
3488 SV *cb;
3489 int i;
3490
3491 if (argc > 0)
3492 {
3493 cb = s_get_cv_croak (argv [0]);
3494
3495 if (!is_coro)
3496 {
3497 if (CvISXSUB (cb))
3498 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3499
3500 if (!CvROOT (cb))
3501 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3502 }
3503 }
3504
3505 Newz (0, coro, 1, struct coro);
3506 coro->args = newAV ();
3507 coro->flags = CF_NEW;
3508
3509 if (coro_first) coro_first->prev = coro;
3510 coro->next = coro_first;
3511 coro_first = coro;
3512
3513 coro->hv = hv = newHV ();
3514 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3515 mg->mg_flags |= MGf_DUP;
3516 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3517
3518 if (argc > 0)
3519 {
3520 av_extend (coro->args, argc + is_coro - 1);
3521
3522 if (is_coro)
3523 {
3524 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3525 cb = (SV *)cv_coro_run;
3526 }
3527
3528 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3529
3530 for (i = 1; i < argc; i++)
3531 av_push (coro->args, newSVsv (argv [i]));
3532 }
3533
3534 return coro_sv;
3535}
3536
3537#ifndef __cplusplus
3538ecb_cold XS(boot_Coro__State);
3539#endif
3540
3541#if CORO_JIT
3542
3543static void ecb_noinline ecb_cold
3544pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3545{
3546 dSP;
3547 AV *av = newAV ();
3548
3549 av_store (av, 3, newSVuv (d));
3550 av_store (av, 2, newSVuv (c));
3551 av_store (av, 1, newSVuv (b));
3552 av_store (av, 0, newSVuv (a));
3553
3554 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3555
3556 PUTBACK;
3557}
3558
3559static void ecb_noinline ecb_cold
3560jit_init (pTHX)
3561{
3562 dSP;
3563 SV *load, *save;
3564 char *map_base;
3565 char *load_ptr, *save_ptr;
3566 STRLEN load_len, save_len, map_len;
3567 int count;
3568
3569 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3570
3571 PUSHMARK (SP);
3572 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3573 #include "state.h"
3574 count = call_pv ("Coro::State::_jit", G_ARRAY);
3575 SPAGAIN;
3576
3577 save = POPs; save_ptr = SvPVbyte (save, save_len);
3578 load = POPs; load_ptr = SvPVbyte (load, load_len);
3579
3580 map_len = load_len + save_len + 16;
3581
3582 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3583
3584 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3585
3586 load_perl_slots = (load_save_perl_slots_type)map_base;
3587 memcpy (map_base, load_ptr, load_len);
3588
3589 map_base += (load_len + 15) & ~15;
3590
3591 save_perl_slots = (load_save_perl_slots_type)map_base;
3592 memcpy (map_base, save_ptr, save_len);
3593
3594 /* we are good citizens and try to make the page read-only, so the evil evil */
3595 /* hackers might have it a bit more difficult */
3596 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3597
3598 PUTBACK;
3599 eval_pv ("undef &Coro::State::_jit", 1);
3600}
3601
3602#endif
3603
1547MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3604MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1548 3605
1549PROTOTYPES: DISABLE 3606PROTOTYPES: DISABLE
1550 3607
1551BOOT: 3608BOOT:
1552{ 3609{
3610#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3611#include "state.h"
1553#ifdef USE_ITHREADS 3612#ifdef USE_ITHREADS
1554 MUTEX_INIT (&coro_mutex); 3613# if CORO_PTHREAD
3614 coro_thx = PERL_GET_CONTEXT;
1555#endif 3615# endif
1556 BOOT_PAGESIZE; 3616#endif
3617 /* perl defines these to check for existance first, but why it doesn't */
3618 /* just create them one at init time is not clear to me, except for */
3619 /* programs trying to delete them, but... */
3620 /* anyway, we declare this as invalid and make sure they are initialised here */
3621 DEFSV;
3622 ERRSV;
3623
3624 cctx_current = cctx_new_empty ();
1557 3625
1558 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3626 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1559 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3627 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1560 3628
1561 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 3629 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1562 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3630 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1563 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 3631 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1564 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1565 3632
1566 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1567 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3633 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1568 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3634 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1569 3635
1570 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3636 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1571 3637
… …
1578 main_top_env = PL_top_env; 3644 main_top_env = PL_top_env;
1579 3645
1580 while (main_top_env->je_prev) 3646 while (main_top_env->je_prev)
1581 main_top_env = main_top_env->je_prev; 3647 main_top_env = main_top_env->je_prev;
1582 3648
3649 {
3650 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3651
3652 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3653 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3654
3655 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3656 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3657 }
3658
1583 coroapi.ver = CORO_API_VERSION; 3659 coroapi.ver = CORO_API_VERSION;
1584 coroapi.rev = CORO_API_REVISION; 3660 coroapi.rev = CORO_API_REVISION;
3661
1585 coroapi.transfer = api_transfer; 3662 coroapi.transfer = api_transfer;
1586 3663
3664 coroapi.sv_state = SvSTATE_;
3665 coroapi.execute_slf = api_execute_slf;
3666 coroapi.prepare_nop = prepare_nop;
3667 coroapi.prepare_schedule = prepare_schedule;
3668 coroapi.prepare_cede = prepare_cede;
3669 coroapi.prepare_cede_notself = prepare_cede_notself;
3670
3671 time_init (aTHX);
3672
1587 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3673 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3674#if CORO_JIT
3675 PUTBACK;
3676 jit_init (aTHX);
3677 SPAGAIN;
3678#endif
1588} 3679}
1589 3680
1590SV * 3681SV *
1591new (char *klass, ...) 3682new (SV *klass, ...)
3683 ALIAS:
3684 Coro::new = 1
1592 CODE: 3685 CODE:
1593{ 3686 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1594 struct coro *coro;
1595 MAGIC *mg;
1596 HV *hv;
1597 int i;
1598
1599 Newz (0, coro, 1, struct coro);
1600 coro->args = newAV ();
1601 coro->flags = CF_NEW;
1602
1603 if (coro_first) coro_first->prev = coro;
1604 coro->next = coro_first;
1605 coro_first = coro;
1606
1607 coro->hv = hv = newHV ();
1608 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1609 mg->mg_flags |= MGf_DUP;
1610 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1611
1612 av_extend (coro->args, items - 1);
1613 for (i = 1; i < items; i++)
1614 av_push (coro->args, newSVsv (ST (i)));
1615}
1616 OUTPUT:
1617 RETVAL
1618
1619# these not obviously related functions are all rolled into the same xs
1620# function to increase chances that they all will call transfer with the same
1621# stack offset
1622void
1623_set_stacklevel (...)
1624 ALIAS:
1625 Coro::State::transfer = 1
1626 Coro::schedule = 2
1627 Coro::cede = 3
1628 Coro::cede_notself = 4
1629 CODE:
1630{
1631 struct transfer_args ta;
1632
1633 PUTBACK;
1634 switch (ix)
1635 {
1636 case 0:
1637 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1638 ta.next = 0;
1639 break;
1640
1641 case 1:
1642 if (items != 2)
1643 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1644
1645 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1646 break;
1647
1648 case 2:
1649 prepare_schedule (aTHX_ &ta);
1650 break;
1651
1652 case 3:
1653 prepare_cede (aTHX_ &ta);
1654 break;
1655
1656 case 4:
1657 if (!prepare_cede_notself (aTHX_ &ta))
1658 XSRETURN_EMPTY;
1659
1660 break;
1661 }
1662 SPAGAIN;
1663
1664 BARRIER;
1665 PUTBACK;
1666 TRANSFER (ta);
1667 SPAGAIN; /* might be the sp of a different coroutine now */
1668 /* be extra careful not to ever do anything after TRANSFER */
1669}
1670
1671bool
1672_destroy (SV *coro_sv)
1673 CODE:
1674 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1675 OUTPUT: 3687 OUTPUT:
1676 RETVAL 3688 RETVAL
1677 3689
1678void 3690void
1679_exit (code) 3691transfer (...)
1680 int code
1681 PROTOTYPE: $ 3692 PROTOTYPE: $$
1682 CODE: 3693 CODE:
1683 _exit (code); 3694 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3695
3696SV *
3697clone (Coro::State coro)
3698 CODE:
3699{
3700#if CORO_CLONE
3701 struct coro *ncoro = coro_clone (aTHX_ coro);
3702 MAGIC *mg;
3703 /* TODO: too much duplication */
3704 ncoro->hv = newHV ();
3705 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3706 mg->mg_flags |= MGf_DUP;
3707 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3708#else
3709 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3710#endif
3711}
3712 OUTPUT:
3713 RETVAL
1684 3714
1685int 3715int
1686cctx_stacksize (int new_stacksize = 0) 3716cctx_stacksize (int new_stacksize = 0)
3717 PROTOTYPE: ;$
1687 CODE: 3718 CODE:
1688 RETVAL = coro_stacksize; 3719 RETVAL = cctx_stacksize;
1689 if (new_stacksize) 3720 if (new_stacksize)
3721 {
1690 coro_stacksize = new_stacksize; 3722 cctx_stacksize = new_stacksize;
3723 ++cctx_gen;
3724 }
1691 OUTPUT: 3725 OUTPUT:
1692 RETVAL 3726 RETVAL
1693 3727
1694int 3728int
3729cctx_max_idle (int max_idle = 0)
3730 PROTOTYPE: ;$
3731 CODE:
3732 RETVAL = cctx_max_idle;
3733 if (max_idle > 1)
3734 cctx_max_idle = max_idle;
3735 OUTPUT:
3736 RETVAL
3737
3738int
1695cctx_count () 3739cctx_count ()
3740 PROTOTYPE:
1696 CODE: 3741 CODE:
1697 RETVAL = cctx_count; 3742 RETVAL = cctx_count;
1698 OUTPUT: 3743 OUTPUT:
1699 RETVAL 3744 RETVAL
1700 3745
1701int 3746int
1702cctx_idle () 3747cctx_idle ()
3748 PROTOTYPE:
1703 CODE: 3749 CODE:
1704 RETVAL = cctx_idle; 3750 RETVAL = cctx_idle;
1705 OUTPUT: 3751 OUTPUT:
1706 RETVAL 3752 RETVAL
1707 3753
1708void 3754void
1709list () 3755list ()
3756 PROTOTYPE:
1710 PPCODE: 3757 PPCODE:
1711{ 3758{
1712 struct coro *coro; 3759 struct coro *coro;
1713 for (coro = coro_first; coro; coro = coro->next) 3760 for (coro = coro_first; coro; coro = coro->next)
1714 if (coro->hv) 3761 if (coro->hv)
1715 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3762 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1716} 3763}
1717 3764
… …
1719call (Coro::State coro, SV *coderef) 3766call (Coro::State coro, SV *coderef)
1720 ALIAS: 3767 ALIAS:
1721 eval = 1 3768 eval = 1
1722 CODE: 3769 CODE:
1723{ 3770{
1724 if (coro->mainstack) 3771 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1725 { 3772 {
1726 struct coro temp; 3773 struct coro *current = SvSTATE_current;
3774 struct CoroSLF slf_save;
1727 3775
1728 if (!(coro->flags & CF_RUNNING)) 3776 if (current != coro)
1729 { 3777 {
1730 PUTBACK; 3778 PUTBACK;
1731 save_perl (aTHX_ &temp); 3779 save_perl (aTHX_ current);
1732 load_perl (aTHX_ coro); 3780 load_perl (aTHX_ coro);
3781 /* the coro is most likely in an active SLF call.
3782 * while not strictly required (the code we execute is
3783 * not allowed to call any SLF functions), it's cleaner
3784 * to reinitialise the slf_frame and restore it later.
3785 * This might one day allow us to actually do SLF calls
3786 * from code executed here.
3787 */
3788 slf_save = slf_frame;
3789 slf_frame.prepare = 0;
3790 SPAGAIN;
1733 } 3791 }
1734 3792
1735 {
1736 dSP;
1737 ENTER;
1738 SAVETMPS;
1739 PUTBACK;
1740 PUSHSTACK; 3793 PUSHSTACK;
3794
1741 PUSHMARK (SP); 3795 PUSHMARK (SP);
3796 PUTBACK;
1742 3797
1743 if (ix) 3798 if (ix)
1744 eval_sv (coderef, 0); 3799 eval_sv (coderef, 0);
1745 else 3800 else
1746 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3801 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1747 3802
1748 POPSTACK; 3803 POPSTACK;
1749 SPAGAIN; 3804 SPAGAIN;
1750 FREETMPS;
1751 LEAVE;
1752 PUTBACK;
1753 }
1754 3805
1755 if (!(coro->flags & CF_RUNNING)) 3806 if (current != coro)
1756 { 3807 {
3808 PUTBACK;
3809 slf_frame = slf_save;
1757 save_perl (aTHX_ coro); 3810 save_perl (aTHX_ coro);
1758 load_perl (aTHX_ &temp); 3811 load_perl (aTHX_ current);
1759 SPAGAIN; 3812 SPAGAIN;
1760 } 3813 }
1761 } 3814 }
1762} 3815}
1763 3816
… …
1766 PROTOTYPE: $ 3819 PROTOTYPE: $
1767 ALIAS: 3820 ALIAS:
1768 is_ready = CF_READY 3821 is_ready = CF_READY
1769 is_running = CF_RUNNING 3822 is_running = CF_RUNNING
1770 is_new = CF_NEW 3823 is_new = CF_NEW
1771 is_destroyed = CF_DESTROYED 3824 is_destroyed = CF_ZOMBIE
3825 is_zombie = CF_ZOMBIE
3826 is_suspended = CF_SUSPENDED
1772 CODE: 3827 CODE:
1773 RETVAL = boolSV (coro->flags & ix); 3828 RETVAL = boolSV (coro->flags & ix);
1774 OUTPUT: 3829 OUTPUT:
1775 RETVAL 3830 RETVAL
1776 3831
1777void 3832void
3833throw (SV *self, SV *exception = &PL_sv_undef)
3834 PROTOTYPE: $;$
3835 CODE:
3836{
3837 struct coro *coro = SvSTATE (self);
3838 struct coro *current = SvSTATE_current;
3839 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3840 SvREFCNT_dec (*exceptionp);
3841 SvGETMAGIC (exception);
3842 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3843
3844 api_ready (aTHX_ self);
3845}
3846
3847void
1778api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3848api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3849 PROTOTYPE: $;$
3850 C_ARGS: aTHX_ coro, flags
1779 3851
1780SV * 3852SV *
1781has_stack (Coro::State coro) 3853has_cctx (Coro::State coro)
1782 PROTOTYPE: $ 3854 PROTOTYPE: $
1783 CODE: 3855 CODE:
1784 RETVAL = boolSV (!!coro->cctx); 3856 /* maybe manage the running flag differently */
3857 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1785 OUTPUT: 3858 OUTPUT:
1786 RETVAL 3859 RETVAL
1787 3860
1788int 3861int
1789is_traced (Coro::State coro) 3862is_traced (Coro::State coro)
… …
1791 CODE: 3864 CODE:
1792 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3865 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1793 OUTPUT: 3866 OUTPUT:
1794 RETVAL 3867 RETVAL
1795 3868
1796IV 3869UV
1797rss (Coro::State coro) 3870rss (Coro::State coro)
1798 PROTOTYPE: $ 3871 PROTOTYPE: $
1799 ALIAS: 3872 ALIAS:
1800 usecount = 1 3873 usecount = 1
1801 CODE: 3874 CODE:
… …
1805 case 1: RETVAL = coro->usecount; break; 3878 case 1: RETVAL = coro->usecount; break;
1806 } 3879 }
1807 OUTPUT: 3880 OUTPUT:
1808 RETVAL 3881 RETVAL
1809 3882
3883void
3884force_cctx ()
3885 PROTOTYPE:
3886 CODE:
3887 cctx_current->idle_sp = 0;
3888
3889void
3890swap_defsv (Coro::State self)
3891 PROTOTYPE: $
3892 ALIAS:
3893 swap_defav = 1
3894 CODE:
3895 if (!self->slot)
3896 croak ("cannot swap state with coroutine that has no saved state,");
3897 else
3898 {
3899 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3900 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3901
3902 SV *tmp = *src; *src = *dst; *dst = tmp;
3903 }
3904
3905void
3906cancel (Coro::State self)
3907 CODE:
3908 coro_state_destroy (aTHX_ self);
3909
3910SV *
3911enable_times (int enabled = enable_times)
3912 CODE:
3913{
3914 RETVAL = boolSV (enable_times);
3915
3916 if (enabled != enable_times)
3917 {
3918 enable_times = enabled;
3919
3920 coro_times_update ();
3921 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3922 }
3923}
3924 OUTPUT:
3925 RETVAL
3926
3927void
3928times (Coro::State self)
3929 PPCODE:
3930{
3931 struct coro *current = SvSTATE (coro_current);
3932
3933 if (ecb_expect_false (current == self))
3934 {
3935 coro_times_update ();
3936 coro_times_add (SvSTATE (coro_current));
3937 }
3938
3939 EXTEND (SP, 2);
3940 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3941 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3942
3943 if (ecb_expect_false (current == self))
3944 coro_times_sub (SvSTATE (coro_current));
3945}
3946
3947void
3948swap_sv (Coro::State coro, SV *sva, SV *svb)
3949 CODE:
3950{
3951 struct coro *current = SvSTATE_current;
3952 AV *swap_sv;
3953 int i;
3954
3955 sva = SvRV (sva);
3956 svb = SvRV (svb);
3957
3958 if (current == coro)
3959 SWAP_SVS_LEAVE (current);
3960
3961 if (!coro->swap_sv)
3962 coro->swap_sv = newAV ();
3963
3964 swap_sv = coro->swap_sv;
3965
3966 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3967 {
3968 SV *a = AvARRAY (swap_sv)[i ];
3969 SV *b = AvARRAY (swap_sv)[i + 1];
3970
3971 if (a == sva && b == svb)
3972 {
3973 SvREFCNT_dec_NN (a);
3974 SvREFCNT_dec_NN (b);
3975
3976 for (; i <= AvFILLp (swap_sv) - 2; i++)
3977 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3978
3979 AvFILLp (swap_sv) -= 2;
3980
3981 goto removed;
3982 }
3983 }
3984
3985 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3986 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3987
3988 removed:
3989
3990 if (current == coro)
3991 SWAP_SVS_ENTER (current);
3992}
3993
1810 3994
1811MODULE = Coro::State PACKAGE = Coro 3995MODULE = Coro::State PACKAGE = Coro
1812 3996
1813BOOT: 3997BOOT:
1814{ 3998{
1815 int i; 3999 if (SVt_LAST > 32)
4000 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1816 4001
1817 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 4002 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1818 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 4003 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4004 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4005 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1819 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 4006 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4007 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4008 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4009 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1820 4010
1821 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 4011 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1822 SvREADONLY_on (coro_current); 4012 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4013 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4014 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1823 4015
1824 coro_stash = gv_stashpv ("Coro", TRUE); 4016 coro_stash = gv_stashpv ("Coro", TRUE);
1825 4017
1826 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4018 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1827 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4019 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1828 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4020 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1829 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4021 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1830 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4022 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1831 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4023 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1832
1833 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1834 coro_ready[i] = newAV ();
1835 4024
1836 { 4025 {
1837 SV *sv = perl_get_sv ("Coro::API", TRUE); 4026 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1838 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1839 4027
1840 coroapi.schedule = api_schedule; 4028 coroapi.schedule = api_schedule;
4029 coroapi.schedule_to = api_schedule_to;
1841 coroapi.cede = api_cede; 4030 coroapi.cede = api_cede;
1842 coroapi.cede_notself = api_cede_notself; 4031 coroapi.cede_notself = api_cede_notself;
1843 coroapi.ready = api_ready; 4032 coroapi.ready = api_ready;
1844 coroapi.is_ready = api_is_ready; 4033 coroapi.is_ready = api_is_ready;
1845 coroapi.nready = &coro_nready; 4034 coroapi.nready = coro_nready;
1846 coroapi.current = coro_current; 4035 coroapi.current = coro_current;
1847 4036
4037 coroapi.enterleave_hook = api_enterleave_hook;
4038 coroapi.enterleave_unhook = api_enterleave_unhook;
4039 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4040
1848 GCoroAPI = &coroapi; 4041 /*GCoroAPI = &coroapi;*/
1849 sv_setiv (sv, (IV)&coroapi); 4042 sv_setiv (sv, (IV)&coroapi);
1850 SvREADONLY_on (sv); 4043 SvREADONLY_on (sv);
1851 } 4044 }
1852} 4045}
4046
4047SV *
4048async (...)
4049 PROTOTYPE: &@
4050 CODE:
4051 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4052 api_ready (aTHX_ RETVAL);
4053 OUTPUT:
4054 RETVAL
4055
4056void
4057_destroy (Coro::State coro)
4058 CODE:
4059 /* used by the manager thread */
4060 coro_state_destroy (aTHX_ coro);
4061
4062void
4063on_destroy (Coro::State coro, SV *cb)
4064 CODE:
4065 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4066
4067void
4068join (...)
4069 CODE:
4070 CORO_EXECUTE_SLF_XS (slf_init_join);
4071
4072void
4073terminate (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4076
4077void
4078cancel (...)
4079 CODE:
4080 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4081
4082int
4083safe_cancel (Coro::State self, ...)
4084 C_ARGS: aTHX_ self, &ST (1), items - 1
4085
4086void
4087schedule (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4090
4091void
4092schedule_to (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4095
4096void
4097cede_to (...)
4098 CODE:
4099 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4100
4101void
4102cede (...)
4103 CODE:
4104 CORO_EXECUTE_SLF_XS (slf_init_cede);
4105
4106void
4107cede_notself (...)
4108 CODE:
4109 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1853 4110
1854void 4111void
1855_set_current (SV *current) 4112_set_current (SV *current)
1856 PROTOTYPE: $ 4113 PROTOTYPE: $
1857 CODE: 4114 CODE:
1858 SvREFCNT_dec (SvRV (coro_current)); 4115 SvREFCNT_dec_NN (SvRV (coro_current));
1859 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4116 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4117
4118void
4119_set_readyhook (SV *hook)
4120 PROTOTYPE: $
4121 CODE:
4122 SvREFCNT_dec (coro_readyhook);
4123 SvGETMAGIC (hook);
4124 if (SvOK (hook))
4125 {
4126 coro_readyhook = newSVsv (hook);
4127 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4128 }
4129 else
4130 {
4131 coro_readyhook = 0;
4132 CORO_READYHOOK = 0;
4133 }
1860 4134
1861int 4135int
1862prio (Coro::State coro, int newprio = 0) 4136prio (Coro::State coro, int newprio = 0)
4137 PROTOTYPE: $;$
1863 ALIAS: 4138 ALIAS:
1864 nice = 1 4139 nice = 1
1865 CODE: 4140 CODE:
1866{ 4141{
1867 RETVAL = coro->prio; 4142 RETVAL = coro->prio;
… …
1869 if (items > 1) 4144 if (items > 1)
1870 { 4145 {
1871 if (ix) 4146 if (ix)
1872 newprio = coro->prio - newprio; 4147 newprio = coro->prio - newprio;
1873 4148
1874 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4149 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1875 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4150 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1876 4151
1877 coro->prio = newprio; 4152 coro->prio = newprio;
1878 } 4153 }
1879} 4154}
1880 OUTPUT: 4155 OUTPUT:
… …
1882 4157
1883SV * 4158SV *
1884ready (SV *self) 4159ready (SV *self)
1885 PROTOTYPE: $ 4160 PROTOTYPE: $
1886 CODE: 4161 CODE:
1887 RETVAL = boolSV (api_ready (self)); 4162 RETVAL = boolSV (api_ready (aTHX_ self));
1888 OUTPUT: 4163 OUTPUT:
1889 RETVAL 4164 RETVAL
1890 4165
1891int 4166int
1892nready (...) 4167nready (...)
… …
1895 RETVAL = coro_nready; 4170 RETVAL = coro_nready;
1896 OUTPUT: 4171 OUTPUT:
1897 RETVAL 4172 RETVAL
1898 4173
1899void 4174void
1900throw (Coro::State self, SV *throw = &PL_sv_undef) 4175suspend (Coro::State self)
1901 PROTOTYPE: $;$ 4176 PROTOTYPE: $
4177 CODE:
4178 self->flags |= CF_SUSPENDED;
4179
4180void
4181resume (Coro::State self)
4182 PROTOTYPE: $
4183 CODE:
4184 self->flags &= ~CF_SUSPENDED;
4185
4186void
4187_pool_handler (...)
4188 CODE:
4189 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4190
4191void
4192async_pool (SV *cv, ...)
4193 PROTOTYPE: &@
4194 PPCODE:
4195{
4196 HV *hv = (HV *)av_pop (av_async_pool);
4197 AV *av = newAV ();
4198 SV *cb = ST (0);
4199 int i;
4200
4201 av_extend (av, items - 2);
4202 for (i = 1; i < items; ++i)
4203 av_push (av, SvREFCNT_inc_NN (ST (i)));
4204
4205 if ((SV *)hv == &PL_sv_undef)
4206 {
4207 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4208 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4209 SvREFCNT_dec_NN (sv);
4210 }
4211
4212 {
4213 struct coro *coro = SvSTATE_hv (hv);
4214
4215 assert (!coro->invoke_cb);
4216 assert (!coro->invoke_av);
4217 coro->invoke_cb = SvREFCNT_inc (cb);
4218 coro->invoke_av = av;
4219 }
4220
4221 api_ready (aTHX_ (SV *)hv);
4222
4223 if (GIMME_V != G_VOID)
4224 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4225 else
4226 SvREFCNT_dec_NN (hv);
4227}
4228
4229SV *
4230rouse_cb ()
4231 PROTOTYPE:
4232 CODE:
4233 RETVAL = coro_new_rouse_cb (aTHX);
4234 OUTPUT:
4235 RETVAL
4236
4237void
4238rouse_wait (...)
4239 PROTOTYPE: ;$
4240 PPCODE:
4241 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4242
4243void
4244on_enter (SV *block)
4245 ALIAS:
4246 on_leave = 1
4247 PROTOTYPE: &
4248 CODE:
4249{
4250 struct coro *coro = SvSTATE_current;
4251 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4252
4253 block = s_get_cv_croak (block);
4254
4255 if (!*avp)
4256 *avp = newAV ();
4257
4258 av_push (*avp, SvREFCNT_inc (block));
4259
4260 if (!ix)
4261 on_enterleave_call (aTHX_ block);
4262
4263 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4264 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4265 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4266}
4267
4268
4269MODULE = Coro::State PACKAGE = PerlIO::cede
4270
4271BOOT:
4272 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4273
4274
4275MODULE = Coro::State PACKAGE = Coro::Semaphore
4276
4277SV *
4278new (SV *klass, SV *count = 0)
4279 CODE:
4280{
4281 int semcnt = 1;
4282
4283 if (count)
4284 {
4285 SvGETMAGIC (count);
4286
4287 if (SvOK (count))
4288 semcnt = SvIV (count);
4289 }
4290
4291 RETVAL = sv_bless (
4292 coro_waitarray_new (aTHX_ semcnt),
4293 GvSTASH (CvGV (cv))
4294 );
4295}
4296 OUTPUT:
4297 RETVAL
4298
4299# helper for Coro::Channel and others
4300SV *
4301_alloc (int count)
4302 CODE:
4303 RETVAL = coro_waitarray_new (aTHX_ count);
4304 OUTPUT:
4305 RETVAL
4306
4307SV *
4308count (SV *self)
4309 CODE:
4310 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4311 OUTPUT:
4312 RETVAL
4313
4314void
4315up (SV *self)
1902 CODE: 4316 CODE:
1903 SvREFCNT_dec (self->throw); 4317 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
1904 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1905 4318
1906void 4319void
1907swap_defsv (Coro::State self) 4320adjust (SV *self, int adjust)
1908 PROTOTYPE: $
1909 ALIAS:
1910 swap_defav = 1
1911 CODE: 4321 CODE:
1912 if (!self->slot) 4322 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
1913 croak ("cannot swap state with coroutine that has no saved state"); 4323
4324void
4325down (...)
4326 CODE:
4327 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4328
4329void
4330wait (...)
4331 CODE:
4332 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4333
4334void
4335try (SV *self)
4336 PPCODE:
4337{
4338 AV *av = (AV *)SvRV (self);
4339 SV *count_sv = AvARRAY (av)[0];
4340 IV count = SvIVX (count_sv);
4341
4342 if (count > 0)
4343 {
4344 --count;
4345 SvIVX (count_sv) = count;
4346 XSRETURN_YES;
4347 }
4348 else
4349 XSRETURN_NO;
4350}
4351
4352void
4353waiters (SV *self)
4354 PPCODE:
4355{
4356 AV *av = (AV *)SvRV (self);
4357 int wcount = AvFILLp (av) + 1 - 1;
4358
4359 if (GIMME_V == G_SCALAR)
4360 XPUSHs (sv_2mortal (newSViv (wcount)));
1914 else 4361 else
1915 { 4362 {
1916 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 4363 int i;
1917 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 4364 EXTEND (SP, wcount);
1918 4365 for (i = 1; i <= wcount; ++i)
1919 SV *tmp = *src; *src = *dst; *dst = tmp; 4366 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1920 } 4367 }
4368}
1921 4369
1922# for async_pool speedup 4370MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4371
1923void 4372void
1924_pool_1 (SV *cb) 4373_may_delete (SV *sem, int count, unsigned int extra_refs)
4374 PPCODE:
4375{
4376 AV *av = (AV *)SvRV (sem);
4377
4378 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4379 && AvFILLp (av) == 0 /* no waiters, just count */
4380 && SvIV (AvARRAY (av)[0]) == count)
4381 XSRETURN_YES;
4382
4383 XSRETURN_NO;
4384}
4385
4386MODULE = Coro::State PACKAGE = Coro::Signal
4387
4388SV *
4389new (SV *klass)
1925 CODE: 4390 CODE:
1926{ 4391 RETVAL = sv_bless (
1927 struct coro *coro = SvSTATE (coro_current); 4392 coro_waitarray_new (aTHX_ 0),
1928 HV *hv = (HV *)SvRV (coro_current); 4393 GvSTASH (CvGV (cv))
1929 AV *defav = GvAV (PL_defgv); 4394 );
1930 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 4395 OUTPUT:
1931 AV *invoke_av; 4396 RETVAL
1932 int i, len;
1933
1934 if (!invoke)
1935 {
1936 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1937 croak ("\3async_pool terminate\2\n");
1938 }
1939
1940 SvREFCNT_dec (coro->saved_deffh);
1941 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1942
1943 hv_store (hv, "desc", sizeof ("desc") - 1,
1944 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1945
1946 invoke_av = (AV *)SvRV (invoke);
1947 len = av_len (invoke_av);
1948
1949 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1950
1951 if (len > 0)
1952 {
1953 av_fill (defav, len - 1);
1954 for (i = 0; i < len; ++i)
1955 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1956 }
1957
1958 SvREFCNT_dec (invoke);
1959}
1960 4397
1961void 4398void
1962_pool_2 (SV *cb) 4399wait (...)
4400 CODE:
4401 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4402
4403void
4404broadcast (SV *self)
4405 CODE:
4406{
4407 AV *av = (AV *)SvRV (self);
4408 coro_signal_wake (aTHX_ av, AvFILLp (av));
4409}
4410
4411void
4412send (SV *self)
4413 CODE:
4414{
4415 AV *av = (AV *)SvRV (self);
4416
4417 if (AvFILLp (av))
4418 coro_signal_wake (aTHX_ av, 1);
4419 else
4420 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4421}
4422
4423IV
4424awaited (SV *self)
1963 CODE: 4425 CODE:
1964{ 4426 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1965 struct coro *coro = SvSTATE (coro_current);
1966
1967 sv_setsv (cb, &PL_sv_undef);
1968
1969 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1970 coro->saved_deffh = 0;
1971
1972 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1973 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1974 {
1975 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1976 croak ("\3async_pool terminate\2\n");
1977 }
1978
1979 av_clear (GvAV (PL_defgv));
1980 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1981 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1982
1983 coro->prio = 0;
1984
1985 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1986 api_trace (coro_current, 0);
1987
1988 av_push (av_async_pool, newSVsv (coro_current));
1989}
1990
1991
1992MODULE = Coro::State PACKAGE = Coro::AIO
1993
1994SV *
1995_get_state ()
1996 CODE:
1997{
1998 struct io_state *data;
1999
2000 RETVAL = newSV (sizeof (struct io_state));
2001 data = (struct io_state *)SvPVX (RETVAL);
2002 SvCUR_set (RETVAL, sizeof (struct io_state));
2003 SvPOK_only (RETVAL);
2004
2005 data->errorno = errno;
2006 data->laststype = PL_laststype;
2007 data->laststatval = PL_laststatval;
2008 data->statcache = PL_statcache;
2009}
2010 OUTPUT: 4427 OUTPUT:
2011 RETVAL 4428 RETVAL
2012 4429
4430
4431MODULE = Coro::State PACKAGE = Coro::AnyEvent
4432
4433BOOT:
4434 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4435
2013void 4436void
2014_set_state (char *data_) 4437_schedule (...)
2015 PROTOTYPE: $
2016 CODE: 4438 CODE:
2017{ 4439{
2018 struct io_state *data = (void *)data_; 4440 static int incede;
2019 4441
2020 errno = data->errorno; 4442 api_cede_notself (aTHX);
2021 PL_laststype = data->laststype;
2022 PL_laststatval = data->laststatval;
2023 PL_statcache = data->statcache;
2024}
2025 4443
4444 ++incede;
4445 while (coro_nready >= incede && api_cede (aTHX))
4446 ;
4447
4448 sv_setsv (sv_activity, &PL_sv_undef);
4449 if (coro_nready >= incede)
4450 {
4451 PUSHMARK (SP);
4452 PUTBACK;
4453 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4454 }
4455
4456 --incede;
4457}
4458
4459
4460MODULE = Coro::State PACKAGE = Coro::AIO
4461
4462void
4463_register (char *target, char *proto, SV *req)
4464 CODE:
4465{
4466 SV *req_cv = s_get_cv_croak (req);
4467 /* newXSproto doesn't return the CV on 5.8 */
4468 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4469 sv_setpv ((SV *)slf_cv, proto);
4470 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4471}
4472
4473MODULE = Coro::State PACKAGE = Coro::Select
4474
4475void
4476patch_pp_sselect ()
4477 CODE:
4478 if (!coro_old_pp_sselect)
4479 {
4480 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4481 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4482 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4483 }
4484
4485void
4486unpatch_pp_sselect ()
4487 CODE:
4488 if (coro_old_pp_sselect)
4489 {
4490 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4491 coro_old_pp_sselect = 0;
4492 }
4493
4494MODULE = Coro::State PACKAGE = Coro::Util
4495
4496void
4497_exit (int code)
4498 CODE:
4499 _exit (code);
4500
4501NV
4502time ()
4503 CODE:
4504 RETVAL = nvtime (aTHX);
4505 OUTPUT:
4506 RETVAL
4507
4508NV
4509gettimeofday ()
4510 PPCODE:
4511{
4512 UV tv [2];
4513 u2time (aTHX_ tv);
4514 EXTEND (SP, 2);
4515 PUSHs (sv_2mortal (newSVuv (tv [0])));
4516 PUSHs (sv_2mortal (newSVuv (tv [1])));
4517}
4518

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