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Comparing Coro/Coro/State.xs (file contents):
Revision 1.248 by root, Mon Sep 29 12:40:50 2008 UTC vs.
Revision 1.367 by root, Mon Aug 3 09:19:57 2009 UTC

… …
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h" 9#include "perliol.h"
10 10
11#include "patchlevel.h" 11#include "schmorp.h"
12 12
13#include <stdio.h> 13#include <stdio.h>
14#include <errno.h> 14#include <errno.h>
15#include <assert.h> 15#include <assert.h>
16 16
17#ifdef WIN32 17#ifdef WIN32
18# undef setjmp 18# undef setjmp
19# undef longjmp 19# undef longjmp
20# undef _exit 20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
22#else 22#else
23# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif 24#endif
25 25
26#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */
100#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
103 55
104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
105# undef CORO_STACKGUARD 57# undef CORO_STACKGUARD
106#endif 58#endif
107 59
… …
114# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif 67#endif
116 68
117/* The next macros try to return the current stack pointer, in an as 69/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */ 70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
119#define dSTACKLEVEL volatile char stacklevel 75# define dSTACKLEVEL volatile void *stacklevel
120#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
121 78
122#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
123 80
124#if __GNUC__ >= 3 81#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value)) 83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
128#else 85#else
129# define attribute(x) 86# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr) 87# define expect(expr,value) (expr)
88# define INLINE static
132#endif 89#endif
133 90
134#define expect_false(expr) expect ((expr) != 0, 0) 91#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1) 92#define expect_true(expr) expect ((expr) != 0, 1)
136 93
137#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
138 95
139#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
140 98
141#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
142static perl_mutex coro_mutex; 100# if CORO_PTHREAD
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif 103#endif
149 104
150/* helper storage struct for Coro::AIO */ 105#ifdef __linux
151struct io_state 106# include <time.h> /* for timespec */
152{ 107# include <syscall.h> /* for SYS_* */
153 int errorno; 108# ifdef SYS_clock_gettime
154 I32 laststype; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
155 int laststatval; 110# define CORO_CLOCK_MONOTONIC 1
156 Stat_t statcache; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
157}; 112# endif
113#endif
158 114
159static double (*nvtime)(); /* so why doesn't it take void? */ 115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
160 117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
161static size_t coro_stacksize = CORO_STACKSIZE; 123static size_t cctx_stacksize = CORO_STACKSIZE;
162static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
163static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env; 126static JMPENV *main_top_env;
165static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
166static volatile SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
129
130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
167 133
168static GV *irsgv; /* $/ */ 134static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */ 135static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook; 136static SV *rv_diehook;
171static SV *rv_warnhook; 137static SV *rv_warnhook;
172static HV *hv_sig; /* %SIG */ 138static HV *hv_sig; /* %SIG */
173 139
174/* async_pool helper stuff */ 140/* async_pool helper stuff */
175static SV *sv_pool_rss; 141static SV *sv_pool_rss;
176static SV *sv_pool_size; 142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
177static AV *av_async_pool; 144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
178 148
179/* Coro::AnyEvent */ 149/* Coro::AnyEvent */
180static SV *sv_activity; 150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
181 157
182static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
183static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
184 160
185enum { 161enum {
… …
190 CC_TRACE_LINE = 0x10, /* trace each statement */ 166 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192}; 168};
193 169
194/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx { 171typedef struct coro_cctx
172{
196 struct coro_cctx *next; 173 struct coro_cctx *next;
197 174
198 /* the stack */ 175 /* the stack */
199 void *sptr; 176 void *sptr;
200 size_t ssize; 177 size_t ssize;
… …
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env; 182 JMPENV *top_env;
206 coro_context cctx; 183 coro_context cctx;
207 184
185 U32 gen;
208#if CORO_USE_VALGRIND 186#if CORO_USE_VALGRIND
209 int valgrind_id; 187 int valgrind_id;
210#endif 188#endif
211 unsigned char flags; 189 unsigned char flags;
212} coro_cctx; 190} coro_cctx;
213 191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
214enum { 196enum {
215 CF_RUNNING = 0x0001, /* coroutine is running */ 197 CF_RUNNING = 0x0001, /* coroutine is running */
216 CF_READY = 0x0002, /* coroutine is ready */ 198 CF_READY = 0x0002, /* coroutine is ready */
217 CF_NEW = 0x0004, /* has never been switched to */ 199 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
219}; 202};
220 203
221/* the structure where most of the perl state is stored, overlaid on the cxstack */ 204/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct { 205typedef struct
206{
223 SV *defsv; 207 SV *defsv;
224 AV *defav; 208 AV *defav;
225 SV *errsv; 209 SV *errsv;
226 SV *irsgv; 210 SV *irsgv;
211 HV *hinthv;
227#define VAR(name,type) type name; 212#define VAR(name,type) type name;
228# include "state.h" 213# include "state.h"
229#undef VAR 214#undef VAR
230} perl_slots; 215} perl_slots;
231 216
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233 218
234/* this is a structure representing a perl-level coroutine */ 219/* this is a structure representing a perl-level coroutine */
235struct coro { 220struct coro {
236 /* the c coroutine allocated to this perl coroutine, if any */ 221 /* the C coroutine allocated to this perl coroutine, if any */
237 coro_cctx *cctx; 222 coro_cctx *cctx;
238 223
239 /* process data */ 224 /* ready queue */
225 struct coro *next_ready;
226
227 /* state data */
228 struct CoroSLF slf_frame; /* saved slf frame */
240 AV *mainstack; 229 AV *mainstack;
241 perl_slots *slot; /* basically the saved sp */ 230 perl_slots *slot; /* basically the saved sp */
242 231
232 CV *startcv; /* the CV to execute */
243 AV *args; /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */ 234 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */ 235 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */ 236 HV *hv; /* the perl hash associated with this coro, if any */
237 void (*on_destroy)(pTHX_ struct coro *coro);
247 238
248 /* statistics */ 239 /* statistics */
249 int usecount; /* number of transfers to this coro */ 240 int usecount; /* number of transfers to this coro */
250 241
251 /* coro process data */ 242 /* coro process data */
252 int prio; 243 int prio;
253 SV *throw; /* exception to be thrown */ 244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
254 246
255 /* async_pool */ 247 /* async_pool */
256 SV *saved_deffh; 248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
257 258
258 /* linked list */ 259 /* linked list */
259 struct coro *next, *prev; 260 struct coro *next, *prev;
260}; 261};
261 262
262typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
263typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
264 265
266/* the following variables are effectively part of the perl context */
267/* and get copied between struct coro and these variables */
268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
265/** Coro ********************************************************************/ 271/** Coro ********************************************************************/
266 272
267#define PRIO_MAX 3 273#define CORO_PRIO_MAX 3
268#define PRIO_HIGH 1 274#define CORO_PRIO_HIGH 1
269#define PRIO_NORMAL 0 275#define CORO_PRIO_NORMAL 0
270#define PRIO_LOW -1 276#define CORO_PRIO_LOW -1
271#define PRIO_IDLE -3 277#define CORO_PRIO_IDLE -3
272#define PRIO_MIN -4 278#define CORO_PRIO_MIN -4
273 279
274/* for Coro.pm */ 280/* for Coro.pm */
275static SV *coro_current; 281static SV *coro_current;
276static SV *coro_readyhook; 282static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
278static int coro_nready; 284static CV *cv_coro_run, *cv_coro_terminate;
279static struct coro *coro_first; 285static struct coro *coro_first;
286#define coro_nready coroapi.nready
287
288/** Coro::Select ************************************************************/
289
290static OP *(*coro_old_pp_sselect) (pTHX);
291static SV *coro_select_select;
292
293/* horrible hack, but if it works... */
294static OP *
295coro_pp_sselect (aTHX)
296{
297 dSP;
298 PUSHMARK (SP - 4); /* fake argument list */
299 XPUSHs (coro_select_select);
300 PUTBACK;
301
302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
303 PL_op->op_flags |= OPf_STACKED;
304 PL_op->op_private = 0;
305 return PL_ppaddr [OP_ENTERSUB](aTHX);
306}
280 307
281/** lowlevel stuff **********************************************************/ 308/** lowlevel stuff **********************************************************/
282 309
283static SV * 310static SV *
284coro_get_sv (pTHX_ const char *name, int create) 311coro_get_sv (pTHX_ const char *name, int create)
… …
308 get_hv (name, create); 335 get_hv (name, create);
309#endif 336#endif
310 return get_hv (name, create); 337 return get_hv (name, create);
311} 338}
312 339
340INLINE void
341coro_times_update ()
342{
343#ifdef coro_clock_gettime
344 struct timespec ts;
345
346 ts.tv_sec = ts.tv_nsec = 0;
347 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
348 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
349
350 ts.tv_sec = ts.tv_nsec = 0;
351 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
352 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
353#else
354 dTHX;
355 UV tv[2];
356
357 u2time (aTHX_ tv);
358 time_real [0] = tv [0];
359 time_real [1] = tv [1] * 1000;
360#endif
361}
362
363INLINE void
364coro_times_add (struct coro *c)
365{
366 c->t_real [1] += time_real [1];
367 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
368 c->t_real [0] += time_real [0];
369
370 c->t_cpu [1] += time_cpu [1];
371 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
372 c->t_cpu [0] += time_cpu [0];
373}
374
375INLINE void
376coro_times_sub (struct coro *c)
377{
378 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
379 c->t_real [1] -= time_real [1];
380 c->t_real [0] -= time_real [0];
381
382 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
383 c->t_cpu [1] -= time_cpu [1];
384 c->t_cpu [0] -= time_cpu [0];
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
313static AV * 439static AV *
314coro_clone_padlist (pTHX_ CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
315{ 441{
316 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
317 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
318 444
319 newpadlist = newAV (); 445 newpadlist = newAV ();
… …
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif 451#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist); 453 --AvFILLp (padlist);
328 454
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
330 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
331 457
332 return newpadlist; 458 return newpadlist;
333} 459}
334 460
335static void 461static void
336free_padlist (pTHX_ AV *padlist) 462free_padlist (pTHX_ AV *padlist)
337{ 463{
338 /* may be during global destruction */ 464 /* may be during global destruction */
339 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
340 { 466 {
341 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
342 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
343 { 470 {
344 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
345 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
346 { 473 I32 j = AvFILLp (av);
347 SV *sv; 474
348 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
349 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
350
351 SvREFCNT_dec (*svp);
352 }
353 } 480 }
354 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
355 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
356 } 486 }
357} 487}
358 488
359static int 489static int
360coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
361{ 491{
362 AV *padlist; 492 AV *padlist;
363 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
364 498
365 /* casting is fun. */ 499 /* casting is fun. */
366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
367 free_padlist (aTHX_ padlist); 501 free_padlist (aTHX_ padlist);
368 502
369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
370 504
371 return 0; 505 return 0;
372} 506}
373
374#define CORO_MAGIC_type_cv PERL_MAGIC_ext
375#define CORO_MAGIC_type_state PERL_MAGIC_ext
376 507
377static MGVTBL coro_cv_vtbl = { 508static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0, 509 0, 0, 0, 0,
379 coro_cv_free 510 coro_cv_free
380}; 511};
381
382#define CORO_MAGIC(sv,type) \
383 SvMAGIC (sv) \
384 ? SvMAGIC (sv)->mg_type == type \
385 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \
387 : 0
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391
392static struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417 512
418/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
419static void 514static void
420get_padlist (pTHX_ CV *cv) 515get_padlist (pTHX_ CV *cv)
421{ 516{
… …
427 else 522 else
428 { 523 {
429#if CORO_PREFER_PERL_FUNCTIONS 524#if CORO_PREFER_PERL_FUNCTIONS
430 /* this is probably cleaner? but also slower! */ 525 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */ 526 /* in practise, it seems to be less stable */
432 CV *cp = Perl_cv_clone (cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
433 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
434 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
435 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
436#else 531#else
437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
438#endif 533#endif
439 } 534 }
440} 535}
441 536
442static void 537static void
… …
449 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
450 545
451 av = (AV *)mg->mg_obj; 546 av = (AV *)mg->mg_obj;
452 547
453 if (expect_false (AvFILLp (av) >= AvMAX (av))) 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
454 av_extend (av, AvMAX (av) + 1); 549 av_extend (av, AvFILLp (av) + 1);
455 550
456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
457} 552}
458 553
459/** load & save, init *******************************************************/ 554/** load & save, init *******************************************************/
555
556static void
557on_enterleave_call (pTHX_ SV *cb);
460 558
461static void 559static void
462load_perl (pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
463{ 561{
464 perl_slots *slot = c->slot; 562 perl_slots *slot = c->slot;
465 c->slot = 0; 563 c->slot = 0;
466 564
467 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
468 566
469 GvSV (PL_defgv) = slot->defsv; 567 GvSV (PL_defgv) = slot->defsv;
470 GvAV (PL_defgv) = slot->defav; 568 GvAV (PL_defgv) = slot->defav;
471 GvSV (PL_errgv) = slot->errsv; 569 GvSV (PL_errgv) = slot->errsv;
472 GvSV (irsgv) = slot->irsgv; 570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
473 572
474 #define VAR(name,type) PL_ ## name = slot->name; 573 #define VAR(name,type) PL_ ## name = slot->name;
475 # include "state.h" 574 # include "state.h"
476 #undef VAR 575 #undef VAR
477 576
… …
488 CvPADLIST (cv) = (AV *)POPs; 587 CvPADLIST (cv) = (AV *)POPs;
489 } 588 }
490 589
491 PUTBACK; 590 PUTBACK;
492 } 591 }
592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (enable_times))
597 {
598 if (expect_false (!times_valid))
599 coro_times_update ();
600
601 coro_times_sub (c);
602 }
603
604 if (expect_false (c->on_enter))
605 {
606 int i;
607
608 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
610 }
493} 611}
494 612
495static void 613static void
496save_perl (pTHX_ Coro__State c) 614save_perl (pTHX_ Coro__State c)
497{ 615{
616 if (expect_false (c->on_leave))
617 {
618 int i;
619
620 for (i = AvFILLp (c->on_leave); i >= 0; --i)
621 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
622 }
623
624 times_valid = 0;
625
626 if (expect_false (enable_times))
627 {
628 coro_times_update (); times_valid = 1;
629 coro_times_add (c);
630 }
631
632 c->except = CORO_THROW;
633 c->slf_frame = slf_frame;
634
498 { 635 {
499 dSP; 636 dSP;
500 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
501 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
502 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
512 { 649 {
513 while (expect_true (cxix >= 0)) 650 while (expect_true (cxix >= 0))
514 { 651 {
515 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
516 653
517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
518 { 655 {
519 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
520 657
521 if (expect_true (CvDEPTH (cv))) 658 if (expect_true (CvDEPTH (cv)))
522 { 659 {
… …
546 /* we manually unroll here, as usually 2 slots is enough */ 683 /* we manually unroll here, as usually 2 slots is enough */
547 if (SLOT_COUNT >= 1) CXINC; 684 if (SLOT_COUNT >= 1) CXINC;
548 if (SLOT_COUNT >= 2) CXINC; 685 if (SLOT_COUNT >= 2) CXINC;
549 if (SLOT_COUNT >= 3) CXINC; 686 if (SLOT_COUNT >= 3) CXINC;
550 { 687 {
551 int i; 688 unsigned int i;
552 for (i = 3; i < SLOT_COUNT; ++i) 689 for (i = 3; i < SLOT_COUNT; ++i)
553 CXINC; 690 CXINC;
554 } 691 }
555 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 692 cxstack_ix -= SLOT_COUNT; /* undo allocation */
556 693
557 c->mainstack = PL_mainstack; 694 c->mainstack = PL_mainstack;
558 695
559 { 696 {
560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
561 698
562 slot->defav = GvAV (PL_defgv); 699 slot->defav = GvAV (PL_defgv);
563 slot->defsv = DEFSV; 700 slot->defsv = DEFSV;
564 slot->errsv = ERRSV; 701 slot->errsv = ERRSV;
565 slot->irsgv = GvSV (irsgv); 702 slot->irsgv = GvSV (irsgv);
703 slot->hinthv = GvHV (PL_hintgv);
566 704
567 #define VAR(name,type) slot->name = PL_ ## name; 705 #define VAR(name,type) slot->name = PL_ ## name;
568 # include "state.h" 706 # include "state.h"
569 #undef VAR 707 #undef VAR
570 } 708 }
571} 709}
572 710
573/* 711/*
574 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
575 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
576 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
577 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
578 */ 716 */
579#if CORO_PREFER_PERL_FUNCTIONS 717#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks 718# define coro_init_stacks(thx) init_stacks ()
581#else 719#else
582static void 720static void
583coro_init_stacks (pTHX) 721coro_init_stacks (pTHX)
584{ 722{
585 PL_curstackinfo = new_stackinfo(32, 8); 723 PL_curstackinfo = new_stackinfo(32, 8);
… …
622 760
623/* 761/*
624 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
625 */ 763 */
626static void 764static void
627coro_destroy_stacks (pTHX) 765coro_destruct_stacks (pTHX)
628{ 766{
629 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
630 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
631 769
632 while (PL_curstackinfo) 770 while (PL_curstackinfo)
… …
648#if !PERL_VERSION_ATLEAST (5,10,0) 786#if !PERL_VERSION_ATLEAST (5,10,0)
649 Safefree (PL_retstack); 787 Safefree (PL_retstack);
650#endif 788#endif
651} 789}
652 790
791#define CORO_RSS \
792 rss += sizeof (SYM (curstackinfo)); \
793 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
794 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
795 rss += SYM (tmps_max) * sizeof (SV *); \
796 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
797 rss += SYM (scopestack_max) * sizeof (I32); \
798 rss += SYM (savestack_max) * sizeof (ANY);
799
653static size_t 800static size_t
654coro_rss (pTHX_ struct coro *coro) 801coro_rss (pTHX_ struct coro *coro)
655{ 802{
656 size_t rss = sizeof (*coro); 803 size_t rss = sizeof (*coro);
657 804
658 if (coro->mainstack) 805 if (coro->mainstack)
659 { 806 {
660 perl_slots tmp_slot;
661 perl_slots *slot;
662
663 if (coro->flags & CF_RUNNING) 807 if (coro->flags & CF_RUNNING)
664 { 808 {
665 slot = &tmp_slot; 809 #define SYM(sym) PL_ ## sym
666 810 CORO_RSS;
667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR 811 #undef SYM
670 } 812 }
671 else 813 else
672 slot = coro->slot;
673
674 if (slot)
675 { 814 {
676 rss += sizeof (slot->curstackinfo); 815 #define SYM(sym) coro->slot->sym
677 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 816 CORO_RSS;
678 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 817 #undef SYM
679 rss += slot->tmps_max * sizeof (SV *);
680 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
681 rss += slot->scopestack_max * sizeof (I32);
682 rss += slot->savestack_max * sizeof (ANY);
683
684#if !PERL_VERSION_ATLEAST (5,10,0)
685 rss += slot->retstack_max * sizeof (OP *);
686#endif
687 } 818 }
688 } 819 }
689 820
690 return rss; 821 return rss;
691} 822}
… …
704#endif 835#endif
705 836
706/* 837/*
707 * This overrides the default magic get method of %SIG elements. 838 * This overrides the default magic get method of %SIG elements.
708 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 839 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
709 * and instead of tryign to save and restore the hash elements, we just provide 840 * and instead of trying to save and restore the hash elements, we just provide
710 * readback here. 841 * readback here.
711 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
712 * not expecting this to actually change the hook. This is a potential problem
713 * when a schedule happens then, but we ignore this.
714 */ 842 */
715static int 843static int
716coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
717{ 845{
718 const char *s = MgPV_nolen_const (mg); 846 const char *s = MgPV_nolen_const (mg);
… …
771 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
772 900
773 if (svp) 901 if (svp)
774 { 902 {
775 SV *old = *svp; 903 SV *old = *svp;
776 *svp = newSVsv (sv); 904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
777 SvREFCNT_dec (old); 905 SvREFCNT_dec (old);
778 return 0; 906 return 0;
779 } 907 }
780 } 908 }
781 909
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783} 911}
784 912
785static void 913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
920static int
921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
786coro_setup (pTHX_ struct coro *coro) 935coro_setup (pTHX_ struct coro *coro)
787{ 936{
788 /* 937 /*
789 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
790 */ 939 */
… …
792 941
793 PL_runops = RUNOPS_DEFAULT; 942 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling; 943 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL; 944 PL_in_eval = EVAL_NULL;
796 PL_comppad = 0; 945 PL_comppad = 0;
946 PL_comppad_name = 0;
947 PL_comppad_name_fill = 0;
948 PL_comppad_name_floor = 0;
797 PL_curpm = 0; 949 PL_curpm = 0;
798 PL_curpad = 0; 950 PL_curpad = 0;
799 PL_localizing = 0; 951 PL_localizing = 0;
800 PL_dirty = 0; 952 PL_dirty = 0;
801 PL_restartop = 0; 953 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0) 954#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0; 955 PL_parser = 0;
804#endif 956#endif
957 PL_hints = 0;
805 958
806 /* recreate the die/warn hooks */ 959 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 960 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 961 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809 962
810 GvSV (PL_defgv) = newSV (0); 963 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0; 964 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0); 965 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 966 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
967 GvHV (PL_hintgv) = 0;
814 PL_rs = newSVsv (GvSV (irsgv)); 968 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 969 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
816 970
817 { 971 {
818 dSP; 972 dSP;
819 LOGOP myop; 973 UNOP myop;
820 974
821 Zero (&myop, 1, LOGOP); 975 Zero (&myop, 1, UNOP);
822 myop.op_next = Nullop; 976 myop.op_next = Nullop;
977 myop.op_type = OP_ENTERSUB;
823 myop.op_flags = OPf_WANT_VOID; 978 myop.op_flags = OPf_WANT_VOID;
824 979
825 PUSHMARK (SP); 980 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 981 PUSHs ((SV *)coro->startcv);
827 PUTBACK; 982 PUTBACK;
828 PL_op = (OP *)&myop; 983 PL_op = (OP *)&myop;
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 984 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN;
831 } 985 }
832 986
833 /* this newly created coroutine might be run on an existing cctx which most 987 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub. 988 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */ 989 */
838 ENTER; 990 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
839} 991 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
840 992
993 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
994 coro_setup_op.op_next = PL_op;
995 coro_setup_op.op_type = OP_ENTERSUB;
996 coro_setup_op.op_ppaddr = pp_slf;
997 /* no flags etc. required, as an init function won't be called */
998
999 PL_op = (OP *)&coro_setup_op;
1000
1001 /* copy throw, in case it was set before coro_setup */
1002 CORO_THROW = coro->except;
1003
1004 if (expect_false (enable_times))
1005 {
1006 coro_times_update ();
1007 coro_times_sub (coro);
1008 }
1009}
1010
841static void 1011static void
842coro_destroy (pTHX_ struct coro *coro) 1012coro_unwind_stacks (pTHX)
843{ 1013{
844 if (!IN_DESTRUCT) 1014 if (!IN_DESTRUCT)
845 { 1015 {
846 /* restore all saved variables and stuff */ 1016 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0); 1017 LEAVE_SCOPE (0);
… …
855 POPSTACK_TO (PL_mainstack); 1025 POPSTACK_TO (PL_mainstack);
856 1026
857 /* unwind main stack */ 1027 /* unwind main stack */
858 dounwind (-1); 1028 dounwind (-1);
859 } 1029 }
1030}
860 1031
861 SvREFCNT_dec (GvSV (PL_defgv)); 1032static void
862 SvREFCNT_dec (GvAV (PL_defgv)); 1033coro_destruct_perl (pTHX_ struct coro *coro)
863 SvREFCNT_dec (GvSV (PL_errgv)); 1034{
864 SvREFCNT_dec (PL_defoutgv); 1035 SV *svf [9];
865 SvREFCNT_dec (PL_rs);
866 SvREFCNT_dec (GvSV (irsgv));
867 1036
868 SvREFCNT_dec (PL_diehook);
869 SvREFCNT_dec (PL_warnhook);
870 1037 {
1038 struct coro *current = SvSTATE_current;
1039
1040 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1041
1042 save_perl (aTHX_ current);
1043 load_perl (aTHX_ coro);
1044
1045 coro_unwind_stacks (aTHX);
1046 coro_destruct_stacks (aTHX);
1047
1048 // now save some sv's to be free'd later
1049 svf [0] = GvSV (PL_defgv);
1050 svf [1] = (SV *)GvAV (PL_defgv);
1051 svf [2] = GvSV (PL_errgv);
1052 svf [3] = (SV *)PL_defoutgv;
1053 svf [4] = PL_rs;
1054 svf [5] = GvSV (irsgv);
1055 svf [6] = (SV *)GvHV (PL_hintgv);
1056 svf [7] = PL_diehook;
1057 svf [8] = PL_warnhook;
1058 assert (9 == sizeof (svf) / sizeof (*svf));
1059
1060 load_perl (aTHX_ current);
1061 }
1062
1063 {
1064 unsigned int i;
1065
1066 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1067 SvREFCNT_dec (svf [i]);
1068
871 SvREFCNT_dec (coro->saved_deffh); 1069 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw); 1070 SvREFCNT_dec (coro->rouse_cb);
873 1071 SvREFCNT_dec (coro->invoke_cb);
874 coro_destroy_stacks (aTHX); 1072 SvREFCNT_dec (coro->invoke_av);
1073 }
875} 1074}
876 1075
877static void 1076INLINE void
878free_coro_mortal (pTHX) 1077free_coro_mortal (pTHX)
879{ 1078{
880 if (expect_true (coro_mortal)) 1079 if (expect_true (coro_mortal))
881 { 1080 {
882 SvREFCNT_dec (coro_mortal); 1081 SvREFCNT_dec (coro_mortal);
… …
887static int 1086static int
888runops_trace (pTHX) 1087runops_trace (pTHX)
889{ 1088{
890 COP *oldcop = 0; 1089 COP *oldcop = 0;
891 int oldcxix = -2; 1090 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx;
894 1091
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1092 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 { 1093 {
897 PERL_ASYNC_CHECK (); 1094 PERL_ASYNC_CHECK ();
898 1095
899 if (cctx->flags & CC_TRACE_ALL) 1096 if (cctx_current->flags & CC_TRACE_ALL)
900 { 1097 {
901 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1098 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
902 { 1099 {
903 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1100 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
904 SV **bot, **top; 1101 SV **bot, **top;
905 AV *av = newAV (); /* return values */ 1102 AV *av = newAV (); /* return values */
906 SV **cb; 1103 SV **cb;
… …
916 : cx->blk_gimme == G_SCALAR ? bot + 1 1113 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot; 1114 : bot;
918 1115
919 av_extend (av, top - bot); 1116 av_extend (av, top - bot);
920 while (bot < top) 1117 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++)); 1118 av_push (av, SvREFCNT_inc_NN (*bot++));
922 1119
923 PL_runops = RUNOPS_DEFAULT; 1120 PL_runops = RUNOPS_DEFAULT;
924 ENTER; 1121 ENTER;
925 SAVETMPS; 1122 SAVETMPS;
926 EXTEND (SP, 3); 1123 EXTEND (SP, 3);
… …
943 1140
944 if (PL_curcop != &PL_compiling) 1141 if (PL_curcop != &PL_compiling)
945 { 1142 {
946 SV **cb; 1143 SV **cb;
947 1144
948 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1145 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
949 { 1146 {
950 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1147 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
951 1148
952 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1149 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
953 { 1150 {
954 runops_proc_t old_runops = PL_runops;
955 dSP; 1151 dSP;
956 GV *gv = CvGV (cx->blk_sub.cv); 1152 GV *gv = CvGV (cx->blk_sub.cv);
957 SV *fullname = sv_2mortal (newSV (0)); 1153 SV *fullname = sv_2mortal (newSV (0));
958 1154
959 if (isGV (gv)) 1155 if (isGV (gv))
… …
964 SAVETMPS; 1160 SAVETMPS;
965 EXTEND (SP, 3); 1161 EXTEND (SP, 3);
966 PUSHMARK (SP); 1162 PUSHMARK (SP);
967 PUSHs (&PL_sv_yes); 1163 PUSHs (&PL_sv_yes);
968 PUSHs (fullname); 1164 PUSHs (fullname);
969 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1165 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
970 PUTBACK; 1166 PUTBACK;
971 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1167 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
972 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1168 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
973 SPAGAIN; 1169 SPAGAIN;
974 FREETMPS; 1170 FREETMPS;
… …
977 } 1173 }
978 1174
979 oldcxix = cxstack_ix; 1175 oldcxix = cxstack_ix;
980 } 1176 }
981 1177
982 if (cctx->flags & CC_TRACE_LINE) 1178 if (cctx_current->flags & CC_TRACE_LINE)
983 { 1179 {
984 dSP; 1180 dSP;
985 1181
986 PL_runops = RUNOPS_DEFAULT; 1182 PL_runops = RUNOPS_DEFAULT;
987 ENTER; 1183 ENTER;
… …
1006 1202
1007 TAINT_NOT; 1203 TAINT_NOT;
1008 return 0; 1204 return 0;
1009} 1205}
1010 1206
1011/* inject a fake call to Coro::State::_cctx_init into the execution */ 1207static struct CoroSLF cctx_ssl_frame;
1012/* _cctx_init should be careful, as it could be called at almost any time */ 1208
1013/* during execution of a perl program */ 1209static void
1210slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1211{
1212 ta->prev = 0;
1213}
1214
1215static int
1216slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1217{
1218 *frame = cctx_ssl_frame;
1219
1220 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1221}
1222
1223/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1014static void NOINLINE 1224static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx) 1225cctx_prepare (pTHX)
1016{ 1226{
1017 dSP;
1018 LOGOP myop;
1019
1020 PL_top_env = &PL_start_env; 1227 PL_top_env = &PL_start_env;
1021 1228
1022 if (cctx->flags & CC_TRACE) 1229 if (cctx_current->flags & CC_TRACE)
1023 PL_runops = runops_trace; 1230 PL_runops = runops_trace;
1024 1231
1025 Zero (&myop, 1, LOGOP); 1232 /* we already must be executing an SLF op, there is no other valid way
1026 myop.op_next = PL_op; 1233 * that can lead to creation of a new cctx */
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1234 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1235 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1028 1236
1029 PUSHMARK (SP); 1237 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1030 EXTEND (SP, 2); 1238 cctx_ssl_frame = slf_frame;
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1239
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1240 slf_frame.prepare = slf_prepare_set_stacklevel;
1033 PUTBACK; 1241 slf_frame.check = slf_check_set_stacklevel;
1034 PL_op = (OP *)&myop; 1242}
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1243
1036 SPAGAIN; 1244/* the tail of transfer: execute stuff we can only do after a transfer */
1245INLINE void
1246transfer_tail (pTHX)
1247{
1248 free_coro_mortal (aTHX);
1037} 1249}
1038 1250
1039/* 1251/*
1040 * this is a _very_ stripped down perl interpreter ;) 1252 * this is a _very_ stripped down perl interpreter ;)
1041 */ 1253 */
1042static void 1254static void
1043cctx_run (void *arg) 1255cctx_run (void *arg)
1044{ 1256{
1257#ifdef USE_ITHREADS
1258# if CORO_PTHREAD
1259 PERL_SET_CONTEXT (coro_thx);
1260# endif
1261#endif
1262 {
1045 dTHX; 1263 dTHX;
1046 1264
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1265 /* normally we would need to skip the entersub here */
1048 UNLOCK; 1266 /* not doing so will re-execute it, which is exactly what we want */
1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next; 1267 /* PL_nop = PL_nop->op_next */
1052 1268
1053 /* inject a fake subroutine call to cctx_init */ 1269 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg); 1270 cctx_prepare (aTHX);
1055 1271
1272 /* cctx_run is the alternative tail of transfer() */
1273 transfer_tail (aTHX);
1274
1056 /* somebody or something will hit me for both perl_run and PL_restartop */ 1275 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op; 1276 PL_restartop = PL_op;
1058 perl_run (PL_curinterp); 1277 perl_run (PL_curinterp);
1059
1060 /* 1278 /*
1279 * Unfortunately, there is no way to get at the return values of the
1280 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1281 * runtime errors here, as this is just a random interpreter, not a thread.
1282 */
1283
1284 /*
1061 * If perl-run returns we assume exit() was being called or the coro 1285 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug) 1286 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the 1287 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main" 1288 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept 1289 * coroutine as Coro has no such concept.
1290 * This actually isn't valid with the pthread backend, but OSes requiring
1291 * that backend are too broken to do it in a standards-compliant way.
1066 */ 1292 */
1067 PL_top_env = main_top_env; 1293 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1294 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1295 }
1069} 1296}
1070 1297
1071static coro_cctx * 1298static coro_cctx *
1072cctx_new () 1299cctx_new ()
1073{ 1300{
1074 coro_cctx *cctx; 1301 coro_cctx *cctx;
1302
1303 ++cctx_count;
1304 New (0, cctx, 1, coro_cctx);
1305
1306 cctx->gen = cctx_gen;
1307 cctx->flags = 0;
1308 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1309
1310 return cctx;
1311}
1312
1313/* create a new cctx only suitable as source */
1314static coro_cctx *
1315cctx_new_empty ()
1316{
1317 coro_cctx *cctx = cctx_new ();
1318
1319 cctx->sptr = 0;
1320 coro_create (&cctx->cctx, 0, 0, 0, 0);
1321
1322 return cctx;
1323}
1324
1325/* create a new cctx suitable as destination/running a perl interpreter */
1326static coro_cctx *
1327cctx_new_run ()
1328{
1329 coro_cctx *cctx = cctx_new ();
1075 void *stack_start; 1330 void *stack_start;
1076 size_t stack_size; 1331 size_t stack_size;
1077 1332
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP 1333#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1334 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */ 1335 /* mmap supposedly does allocate-on-write for us */
1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1336 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086 1337
1087 if (cctx->sptr != (void *)-1) 1338 if (cctx->sptr != (void *)-1)
1088 { 1339 {
1089# if CORO_STACKGUARD 1340 #if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1341 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif 1342 #endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1343 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1344 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED; 1345 cctx->flags |= CC_MAPPED;
1095 } 1346 }
1096 else 1347 else
1097#endif 1348#endif
1098 { 1349 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long); 1350 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long); 1351 New (0, cctx->sptr, cctx_stacksize, long);
1101 1352
1102 if (!cctx->sptr) 1353 if (!cctx->sptr)
1103 { 1354 {
1104 perror ("FATAL: unable to allocate stack for coroutine"); 1355 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1105 _exit (EXIT_FAILURE); 1356 _exit (EXIT_FAILURE);
1106 } 1357 }
1107 1358
1108 stack_start = cctx->sptr; 1359 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize; 1360 stack_size = cctx->ssize;
1110 } 1361 }
1111 1362
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1363 #if CORO_USE_VALGRIND
1364 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1365 #endif
1366
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1367 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114 1368
1115 return cctx; 1369 return cctx;
1116} 1370}
1117 1371
… …
1119cctx_destroy (coro_cctx *cctx) 1373cctx_destroy (coro_cctx *cctx)
1120{ 1374{
1121 if (!cctx) 1375 if (!cctx)
1122 return; 1376 return;
1123 1377
1378 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1379
1124 --cctx_count; 1380 --cctx_count;
1381 coro_destroy (&cctx->cctx);
1125 1382
1383 /* coro_transfer creates new, empty cctx's */
1384 if (cctx->sptr)
1385 {
1126#if CORO_USE_VALGRIND 1386 #if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1387 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1388 #endif
1389
1390#if HAVE_MMAP
1391 if (cctx->flags & CC_MAPPED)
1392 munmap (cctx->sptr, cctx->ssize);
1393 else
1128#endif 1394#endif
1129
1130#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize);
1133 else
1134#endif
1135 Safefree (cctx->sptr); 1395 Safefree (cctx->sptr);
1396 }
1136 1397
1137 Safefree (cctx); 1398 Safefree (cctx);
1138} 1399}
1139 1400
1140/* wether this cctx should be destructed */ 1401/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1402#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1142 1403
1143static coro_cctx * 1404static coro_cctx *
1144cctx_get (pTHX) 1405cctx_get (pTHX)
1145{ 1406{
1146 while (expect_true (cctx_first)) 1407 while (expect_true (cctx_first))
… …
1153 return cctx; 1414 return cctx;
1154 1415
1155 cctx_destroy (cctx); 1416 cctx_destroy (cctx);
1156 } 1417 }
1157 1418
1158 return cctx_new (); 1419 return cctx_new_run ();
1159} 1420}
1160 1421
1161static void 1422static void
1162cctx_put (coro_cctx *cctx) 1423cctx_put (coro_cctx *cctx)
1163{ 1424{
1425 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1426
1164 /* free another cctx if overlimit */ 1427 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1428 if (expect_false (cctx_idle >= cctx_max_idle))
1166 { 1429 {
1167 coro_cctx *first = cctx_first; 1430 coro_cctx *first = cctx_first;
1168 cctx_first = first->next; 1431 cctx_first = first->next;
1169 --cctx_idle; 1432 --cctx_idle;
1170 1433
… …
1179/** coroutine switching *****************************************************/ 1442/** coroutine switching *****************************************************/
1180 1443
1181static void 1444static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next) 1445transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{ 1446{
1447 /* TODO: throwing up here is considered harmful */
1448
1184 if (expect_true (prev != next)) 1449 if (expect_true (prev != next))
1185 { 1450 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1451 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1452 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1188 1453
1189 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1191
1192 if (expect_false (next->flags & CF_DESTROYED)) 1454 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1455 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1194 1456
1195#if !PERL_VERSION_ATLEAST (5,10,0) 1457#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1458 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1459 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1198#endif 1460#endif
1199 } 1461 }
1200} 1462}
1201 1463
1202/* always use the TRANSFER macro */ 1464/* always use the TRANSFER macro */
1203static void NOINLINE 1465static void NOINLINE /* noinline so we have a fixed stackframe */
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1466transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{ 1467{
1206 dSTACKLEVEL; 1468 dSTACKLEVEL;
1207 static volatile int has_throw;
1208 1469
1209 /* sometimes transfer is only called to set idle_sp */ 1470 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next)) 1471 if (expect_false (!prev))
1211 { 1472 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1473 cctx_current->idle_sp = STACKLEVEL;
1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1474 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 } 1475 }
1215 else if (expect_true (prev != next)) 1476 else if (expect_true (prev != next))
1216 { 1477 {
1217 coro_cctx *prev__cctx; 1478 coro_cctx *cctx_prev;
1218 1479
1219 if (expect_false (prev->flags & CF_NEW)) 1480 if (expect_false (prev->flags & CF_NEW))
1220 { 1481 {
1221 /* create a new empty context */ 1482 /* create a new empty/source context */
1222 Newz (0, prev->cctx, 1, coro_cctx);
1223 prev->flags &= ~CF_NEW; 1483 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING; 1484 prev->flags |= CF_RUNNING;
1225 } 1485 }
1226 1486
1227 prev->flags &= ~CF_RUNNING; 1487 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING; 1488 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231 1489
1232 /* first get rid of the old state */ 1490 /* first get rid of the old state */
1233 save_perl (aTHX_ prev); 1491 save_perl (aTHX_ prev);
1234 1492
1235 if (expect_false (next->flags & CF_NEW)) 1493 if (expect_false (next->flags & CF_NEW))
… …
1240 coro_setup (aTHX_ next); 1498 coro_setup (aTHX_ next);
1241 } 1499 }
1242 else 1500 else
1243 load_perl (aTHX_ next); 1501 load_perl (aTHX_ next);
1244 1502
1245 prev__cctx = prev->cctx;
1246
1247 /* possibly "free" the cctx */ 1503 /* possibly untie and reuse the cctx */
1248 if (expect_true ( 1504 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL 1505 cctx_current->idle_sp == STACKLEVEL
1250 && !(prev__cctx->flags & CC_TRACE) 1506 && !(cctx_current->flags & CC_TRACE)
1251 && !force_cctx 1507 && !force_cctx
1252 )) 1508 ))
1253 { 1509 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1510 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1511 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1256 1512
1257 prev->cctx = 0;
1258
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1513 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1514 /* without this the next cctx_get might destroy the running cctx while still in use */
1261 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1515 if (expect_false (CCTX_EXPIRED (cctx_current)))
1262 if (!next->cctx) 1516 if (expect_true (!next->cctx))
1263 next->cctx = cctx_get (aTHX); 1517 next->cctx = cctx_get (aTHX);
1264 1518
1265 cctx_put (prev__cctx); 1519 cctx_put (cctx_current);
1266 } 1520 }
1521 else
1522 prev->cctx = cctx_current;
1267 1523
1268 ++next->usecount; 1524 ++next->usecount;
1269 1525
1270 if (expect_true (!next->cctx)) 1526 cctx_prev = cctx_current;
1271 next->cctx = cctx_get (aTHX); 1527 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1272 1528
1273 has_throw = !!next->throw; 1529 next->cctx = 0;
1274 1530
1275 if (expect_false (prev__cctx != next->cctx)) 1531 if (expect_false (cctx_prev != cctx_current))
1276 { 1532 {
1277 prev__cctx->top_env = PL_top_env; 1533 cctx_prev->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env; 1534 PL_top_env = cctx_current->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1535 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1280 } 1536 }
1281 1537
1282 free_coro_mortal (aTHX); 1538 transfer_tail (aTHX);
1283 UNLOCK;
1284
1285 if (expect_false (has_throw))
1286 {
1287 struct coro *coro = SvSTATE (coro_current);
1288
1289 if (coro->throw)
1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
1294 croak (0);
1295 }
1296 }
1297 } 1539 }
1298} 1540}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304 1541
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1542#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1543#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307 1544
1308/** high level stuff ********************************************************/ 1545/** high level stuff ********************************************************/
… …
1310static int 1547static int
1311coro_state_destroy (pTHX_ struct coro *coro) 1548coro_state_destroy (pTHX_ struct coro *coro)
1312{ 1549{
1313 if (coro->flags & CF_DESTROYED) 1550 if (coro->flags & CF_DESTROYED)
1314 return 0; 1551 return 0;
1552
1553 if (coro->on_destroy && !PL_dirty)
1554 coro->on_destroy (aTHX_ coro);
1315 1555
1316 coro->flags |= CF_DESTROYED; 1556 coro->flags |= CF_DESTROYED;
1317 1557
1318 if (coro->flags & CF_READY) 1558 if (coro->flags & CF_READY)
1319 { 1559 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1560 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */ 1561 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready; 1562 --coro_nready;
1324 UNLOCK;
1325 } 1563 }
1326 else 1564 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1565 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328 1566
1329 if (coro->mainstack && coro->mainstack != main_mainstack) 1567 if (coro->mainstack
1330 { 1568 && coro->mainstack != main_mainstack
1331 struct coro temp; 1569 && coro->slot
1332 1570 && !PL_dirty)
1333 if (coro->flags & CF_RUNNING)
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335
1336 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro);
1338
1339 coro_destroy (aTHX_ coro); 1571 coro_destruct_perl (aTHX_ coro);
1340
1341 load_perl (aTHX_ &temp);
1342
1343 coro->slot = 0;
1344 }
1345 1572
1346 cctx_destroy (coro->cctx); 1573 cctx_destroy (coro->cctx);
1574 SvREFCNT_dec (coro->startcv);
1347 SvREFCNT_dec (coro->args); 1575 SvREFCNT_dec (coro->args);
1576 SvREFCNT_dec (CORO_THROW);
1348 1577
1349 if (coro->next) coro->next->prev = coro->prev; 1578 if (coro->next) coro->next->prev = coro->prev;
1350 if (coro->prev) coro->prev->next = coro->next; 1579 if (coro->prev) coro->prev->next = coro->next;
1351 if (coro == coro_first) coro_first = coro->next; 1580 if (coro == coro_first) coro_first = coro->next;
1352 1581
… …
1390# define MGf_DUP 0 1619# define MGf_DUP 0
1391#endif 1620#endif
1392}; 1621};
1393 1622
1394static void 1623static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1624prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{ 1625{
1397 ta->prev = SvSTATE (prev_sv); 1626 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv); 1627 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta); 1628 TRANSFER_CHECK (*ta);
1400} 1629}
1401 1630
1402static void 1631static void
1403api_transfer (SV *prev_sv, SV *next_sv) 1632api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1404{ 1633{
1405 dTHX;
1406 struct transfer_args ta; 1634 struct coro_transfer_args ta;
1407 1635
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1636 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1); 1637 TRANSFER (ta, 1);
1410} 1638}
1411 1639
1412/** Coro ********************************************************************/ 1640/** Coro ********************************************************************/
1413 1641
1414static void 1642INLINE void
1415coro_enq (pTHX_ SV *coro_sv) 1643coro_enq (pTHX_ struct coro *coro)
1416{ 1644{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1645 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1418}
1419 1646
1420static SV * 1647 SvREFCNT_inc_NN (coro->hv);
1648
1649 coro->next_ready = 0;
1650 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1651 ready [1] = coro;
1652}
1653
1654INLINE struct coro *
1421coro_deq (pTHX) 1655coro_deq (pTHX)
1422{ 1656{
1423 int prio; 1657 int prio;
1424 1658
1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1659 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1426 if (AvFILLp (coro_ready [prio]) >= 0) 1660 {
1427 return av_shift (coro_ready [prio]); 1661 struct coro **ready = coro_ready [prio];
1662
1663 if (ready [0])
1664 {
1665 struct coro *coro = ready [0];
1666 ready [0] = coro->next_ready;
1667 return coro;
1668 }
1669 }
1428 1670
1429 return 0; 1671 return 0;
1430} 1672}
1431 1673
1674static void
1675invoke_sv_ready_hook_helper (void)
1676{
1677 dTHX;
1678 dSP;
1679
1680 ENTER;
1681 SAVETMPS;
1682
1683 PUSHMARK (SP);
1684 PUTBACK;
1685 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1686
1687 FREETMPS;
1688 LEAVE;
1689}
1690
1432static int 1691static int
1433api_ready (SV *coro_sv) 1692api_ready (pTHX_ SV *coro_sv)
1434{ 1693{
1435 dTHX;
1436 struct coro *coro;
1437 SV *sv_hook;
1438 void (*xs_hook)(void);
1439
1440 if (SvROK (coro_sv))
1441 coro_sv = SvRV (coro_sv);
1442
1443 coro = SvSTATE (coro_sv); 1694 struct coro *coro = SvSTATE (coro_sv);
1444 1695
1445 if (coro->flags & CF_READY) 1696 if (coro->flags & CF_READY)
1446 return 0; 1697 return 0;
1447 1698
1448 coro->flags |= CF_READY; 1699 coro->flags |= CF_READY;
1449 1700
1450 LOCK; 1701 coro_enq (aTHX_ coro);
1451 1702
1452 sv_hook = coro_nready ? 0 : coro_readyhook; 1703 if (!coro_nready++)
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1704 if (coroapi.readyhook)
1454 1705 coroapi.readyhook ();
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1456 ++coro_nready;
1457
1458 UNLOCK;
1459
1460 if (sv_hook)
1461 {
1462 dSP;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (sv_hook, G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 }
1475
1476 if (xs_hook)
1477 xs_hook ();
1478 1706
1479 return 1; 1707 return 1;
1480} 1708}
1481 1709
1482static int 1710static int
1483api_is_ready (SV *coro_sv) 1711api_is_ready (pTHX_ SV *coro_sv)
1484{ 1712{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1713 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487} 1714}
1488 1715
1489static void 1716/* expects to own a reference to next->hv */
1717INLINE void
1490prepare_schedule (pTHX_ struct transfer_args *ta) 1718prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1491{ 1719{
1492 SV *prev_sv, *next_sv;
1493
1494 for (;;)
1495 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX);
1498
1499 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv))
1501 {
1502 dSP;
1503 UNLOCK;
1504
1505 ENTER;
1506 SAVETMPS;
1507
1508 PUSHMARK (SP);
1509 PUTBACK;
1510 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1511 SPAGAIN;
1512
1513 FREETMPS;
1514 LEAVE;
1515 continue;
1516 }
1517
1518 ta->next = SvSTATE (next_sv);
1519
1520 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */
1526 continue;
1527 }
1528
1529 --coro_nready;
1530 UNLOCK;
1531 break;
1532 }
1533
1534 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current); 1720 SV *prev_sv = SvRV (coro_current);
1721
1536 ta->prev = SvSTATE (prev_sv); 1722 ta->prev = SvSTATE_hv (prev_sv);
1723 ta->next = next;
1724
1537 TRANSFER_CHECK (*ta); 1725 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY); 1726
1539 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv); 1727 SvRV_set (coro_current, (SV *)next->hv);
1541 1728
1542 LOCK;
1543 free_coro_mortal (aTHX); 1729 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv; 1730 coro_mortal = prev_sv;
1545 UNLOCK;
1546} 1731}
1547 1732
1548static void 1733static void
1734prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1735{
1736 for (;;)
1737 {
1738 struct coro *next = coro_deq (aTHX);
1739
1740 if (expect_true (next))
1741 {
1742 /* cannot transfer to destroyed coros, skip and look for next */
1743 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1744 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1745 else
1746 {
1747 next->flags &= ~CF_READY;
1748 --coro_nready;
1749
1750 prepare_schedule_to (aTHX_ ta, next);
1751 break;
1752 }
1753 }
1754 else
1755 {
1756 /* nothing to schedule: call the idle handler */
1757 if (SvROK (sv_idle)
1758 && SvOBJECT (SvRV (sv_idle)))
1759 {
1760 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1761 api_ready (aTHX_ SvRV (sv_idle));
1762 --coro_nready;
1763 }
1764 else
1765 {
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
1778 }
1779 }
1780}
1781
1782INLINE void
1549prepare_cede (pTHX_ struct transfer_args *ta) 1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
1550{ 1784{
1551 api_ready (coro_current); 1785 api_ready (aTHX_ coro_current);
1552 prepare_schedule (aTHX_ ta); 1786 prepare_schedule (aTHX_ ta);
1553} 1787}
1554 1788
1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
1793
1794 if (coro_nready)
1795 {
1796 prepare_schedule (aTHX_ ta);
1797 api_ready (aTHX_ prev);
1798 }
1799 else
1800 prepare_nop (aTHX_ ta);
1801}
1802
1803static void
1804api_schedule (pTHX)
1805{
1806 struct coro_transfer_args ta;
1807
1808 prepare_schedule (aTHX_ &ta);
1809 TRANSFER (ta, 1);
1810}
1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1555static int 1822static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta) 1823api_cede (pTHX)
1557{ 1824{
1558 if (coro_nready) 1825 struct coro_transfer_args ta;
1559 { 1826
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta); 1827 prepare_cede (aTHX_ &ta);
1562 api_ready (prev); 1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
1563 return 1; 1832 return 1;
1564 } 1833 }
1565 else 1834 else
1566 return 0; 1835 return 0;
1567} 1836}
1568 1837
1569static void
1570api_schedule (void)
1571{
1572 dTHX;
1573 struct transfer_args ta;
1574
1575 prepare_schedule (aTHX_ &ta);
1576 TRANSFER (ta, 1);
1577}
1578
1579static int 1838static int
1580api_cede (void) 1839api_cede_notself (pTHX)
1581{ 1840{
1582 dTHX; 1841 if (coro_nready)
1842 {
1583 struct transfer_args ta; 1843 struct coro_transfer_args ta;
1584 1844
1585 prepare_cede (aTHX_ &ta); 1845 prepare_cede_notself (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1); 1846 TRANSFER (ta, 1);
1590 return 1; 1847 return 1;
1591 } 1848 }
1592 else 1849 else
1593 return 0; 1850 return 0;
1594} 1851}
1595 1852
1596static int 1853static void
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
1603 {
1604 TRANSFER (ta, 1);
1605 return 1;
1606 }
1607 else
1608 return 0;
1609}
1610
1611static void
1612api_trace (SV *coro_sv, int flags) 1854api_trace (pTHX_ SV *coro_sv, int flags)
1613{ 1855{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv); 1856 struct coro *coro = SvSTATE (coro_sv);
1616 1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1617 if (flags & CC_TRACE) 1861 if (flags & CC_TRACE)
1618 { 1862 {
1619 if (!coro->cctx) 1863 if (!coro->cctx)
1620 coro->cctx = cctx_new (); 1864 coro->cctx = cctx_new_run ();
1621 else if (!(coro->cctx->flags & CC_TRACE)) 1865 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack"); 1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1623 1867
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 } 1869 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 { 1871 {
… …
1632 else 1876 else
1633 coro->slot->runops = RUNOPS_DEFAULT; 1877 coro->slot->runops = RUNOPS_DEFAULT;
1634 } 1878 }
1635} 1879}
1636 1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
1892 {
1893 dSP; /* don't disturb outer sp */
1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1910 }
1911 }
1912}
1913
1914static void
1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
1920
1921 av_extend (av, items - 1);
1922 for (i = 0; i < items; ++i)
1923 av_push (av, SvREFCNT_inc_NN (arg [i]));
1924
1925 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1926
1927 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1928 api_ready (aTHX_ sv_manager);
1929
1930 frame->prepare = prepare_schedule;
1931 frame->check = slf_check_repeat;
1932
1933 /* as a minor optimisation, we could unwind all stacks here */
1934 /* but that puts extra pressure on pp_slf, and is not worth much */
1935 /*coro_unwind_stacks (aTHX);*/
1936}
1937
1938/*****************************************************************************/
1939/* async pool handler */
1940
1637static int 1941static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1942slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1639{ 1943{
1640 AV *padlist; 1944 HV *hv = (HV *)SvRV (coro_current);
1641 AV *av = (AV *)mg->mg_obj; 1945 struct coro *coro = (struct coro *)frame->data;
1642 1946
1643 abort (); 1947 if (!coro->invoke_cb)
1948 return 1; /* loop till we have invoke */
1949 else
1950 {
1951 hv_store (hv, "desc", sizeof ("desc") - 1,
1952 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1953
1954 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1955
1956 {
1957 dSP;
1958 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1959 PUTBACK;
1960 }
1961
1962 SvREFCNT_dec (GvAV (PL_defgv));
1963 GvAV (PL_defgv) = coro->invoke_av;
1964 coro->invoke_av = 0;
1965
1966 return 0;
1967 }
1968}
1969
1970static void
1971slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1972{
1973 HV *hv = (HV *)SvRV (coro_current);
1974 struct coro *coro = SvSTATE_hv ((SV *)hv);
1975
1976 if (expect_true (coro->saved_deffh))
1977 {
1978 /* subsequent iteration */
1979 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1980 coro->saved_deffh = 0;
1981
1982 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1983 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1984 {
1985 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1986 coro->invoke_av = newAV ();
1987
1988 frame->prepare = prepare_nop;
1989 }
1990 else
1991 {
1992 av_clear (GvAV (PL_defgv));
1993 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1994
1995 coro->prio = 0;
1996
1997 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1998 api_trace (aTHX_ coro_current, 0);
1999
2000 frame->prepare = prepare_schedule;
2001 av_push (av_async_pool, SvREFCNT_inc (hv));
2002 }
2003 }
2004 else
2005 {
2006 /* first iteration, simply fall through */
2007 frame->prepare = prepare_nop;
2008 }
2009
2010 frame->check = slf_check_pool_handler;
2011 frame->data = (void *)coro;
2012}
2013
2014/*****************************************************************************/
2015/* rouse callback */
2016
2017#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2018
2019static void
2020coro_rouse_callback (pTHX_ CV *cv)
2021{
2022 dXSARGS;
2023 SV *data = (SV *)S_GENSUB_ARG;
2024
2025 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2026 {
2027 /* first call, set args */
2028 SV *coro = SvRV (data);
2029 AV *av = newAV ();
2030
2031 SvRV_set (data, (SV *)av);
2032
2033 /* better take a full copy of the arguments */
2034 while (items--)
2035 av_store (av, items, newSVsv (ST (items)));
2036
2037 api_ready (aTHX_ coro);
2038 SvREFCNT_dec (coro);
2039 }
2040
2041 XSRETURN_EMPTY;
2042}
2043
2044static int
2045slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2046{
2047 SV *data = (SV *)frame->data;
2048
2049 if (CORO_THROW)
2050 return 0;
2051
2052 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2053 return 1;
2054
2055 /* now push all results on the stack */
2056 {
2057 dSP;
2058 AV *av = (AV *)SvRV (data);
2059 int i;
2060
2061 EXTEND (SP, AvFILLp (av) + 1);
2062 for (i = 0; i <= AvFILLp (av); ++i)
2063 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2064
2065 /* we have stolen the elements, so set length to zero and free */
2066 AvFILLp (av) = -1;
2067 av_undef (av);
2068
2069 PUTBACK;
2070 }
1644 2071
1645 return 0; 2072 return 0;
1646} 2073}
1647 2074
1648static MGVTBL coro_gensub_vtbl = { 2075static void
1649 0, 0, 0, 0, 2076slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1650 coro_gensub_free 2077{
1651}; 2078 SV *cb;
2079
2080 if (items)
2081 cb = arg [0];
2082 else
2083 {
2084 struct coro *coro = SvSTATE_current;
2085
2086 if (!coro->rouse_cb)
2087 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2088
2089 cb = sv_2mortal (coro->rouse_cb);
2090 coro->rouse_cb = 0;
2091 }
2092
2093 if (!SvROK (cb)
2094 || SvTYPE (SvRV (cb)) != SVt_PVCV
2095 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2096 croak ("Coro::rouse_wait called with illegal callback argument,");
2097
2098 {
2099 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2100 SV *data = (SV *)S_GENSUB_ARG;
2101
2102 frame->data = (void *)data;
2103 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2104 frame->check = slf_check_rouse_wait;
2105 }
2106}
2107
2108static SV *
2109coro_new_rouse_cb (pTHX)
2110{
2111 HV *hv = (HV *)SvRV (coro_current);
2112 struct coro *coro = SvSTATE_hv (hv);
2113 SV *data = newRV_inc ((SV *)hv);
2114 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2115
2116 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2117 SvREFCNT_dec (data); /* magicext increases the refcount */
2118
2119 SvREFCNT_dec (coro->rouse_cb);
2120 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2121
2122 return cb;
2123}
2124
2125/*****************************************************************************/
2126/* schedule-like-function opcode (SLF) */
2127
2128static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2129static const CV *slf_cv;
2130static SV **slf_argv;
2131static int slf_argc, slf_arga; /* count, allocated */
2132static I32 slf_ax; /* top of stack, for restore */
2133
2134/* this restores the stack in the case we patched the entersub, to */
2135/* recreate the stack frame as perl will on following calls */
2136/* since entersub cleared the stack */
2137static OP *
2138pp_restore (pTHX)
2139{
2140 int i;
2141 SV **SP = PL_stack_base + slf_ax;
2142
2143 PUSHMARK (SP);
2144
2145 EXTEND (SP, slf_argc + 1);
2146
2147 for (i = 0; i < slf_argc; ++i)
2148 PUSHs (sv_2mortal (slf_argv [i]));
2149
2150 PUSHs ((SV *)CvGV (slf_cv));
2151
2152 RETURNOP (slf_restore.op_first);
2153}
2154
2155static void
2156slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2157{
2158 SV **arg = (SV **)slf_frame.data;
2159
2160 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2161}
2162
2163static void
2164slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2165{
2166 if (items != 2)
2167 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2168
2169 frame->prepare = slf_prepare_transfer;
2170 frame->check = slf_check_nop;
2171 frame->data = (void *)arg; /* let's hope it will stay valid */
2172}
2173
2174static void
2175slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 frame->prepare = prepare_schedule;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
2182slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2183{
2184 struct coro *next = (struct coro *)slf_frame.data;
2185
2186 SvREFCNT_inc_NN (next->hv);
2187 prepare_schedule_to (aTHX_ ta, next);
2188}
2189
2190static void
2191slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2192{
2193 if (!items)
2194 croak ("Coro::schedule_to expects a coroutine argument, caught");
2195
2196 frame->data = (void *)SvSTATE (arg [0]);
2197 frame->prepare = slf_prepare_schedule_to;
2198 frame->check = slf_check_nop;
2199}
2200
2201static void
2202slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2203{
2204 api_ready (aTHX_ SvRV (coro_current));
2205
2206 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2207}
2208
2209static void
2210slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2211{
2212 frame->prepare = prepare_cede;
2213 frame->check = slf_check_nop;
2214}
2215
2216static void
2217slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2218{
2219 frame->prepare = prepare_cede_notself;
2220 frame->check = slf_check_nop;
2221}
2222
2223/*
2224 * these not obviously related functions are all rolled into one
2225 * function to increase chances that they all will call transfer with the same
2226 * stack offset
2227 * SLF stands for "schedule-like-function".
2228 */
2229static OP *
2230pp_slf (pTHX)
2231{
2232 I32 checkmark; /* mark SP to see how many elements check has pushed */
2233
2234 /* set up the slf frame, unless it has already been set-up */
2235 /* the latter happens when a new coro has been started */
2236 /* or when a new cctx was attached to an existing coroutine */
2237 if (expect_true (!slf_frame.prepare))
2238 {
2239 /* first iteration */
2240 dSP;
2241 SV **arg = PL_stack_base + TOPMARK + 1;
2242 int items = SP - arg; /* args without function object */
2243 SV *gv = *sp;
2244
2245 /* do a quick consistency check on the "function" object, and if it isn't */
2246 /* for us, divert to the real entersub */
2247 if (SvTYPE (gv) != SVt_PVGV
2248 || !GvCV (gv)
2249 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2250 return PL_ppaddr[OP_ENTERSUB](aTHX);
2251
2252 if (!(PL_op->op_flags & OPf_STACKED))
2253 {
2254 /* ampersand-form of call, use @_ instead of stack */
2255 AV *av = GvAV (PL_defgv);
2256 arg = AvARRAY (av);
2257 items = AvFILLp (av) + 1;
2258 }
2259
2260 /* now call the init function, which needs to set up slf_frame */
2261 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2262 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2263
2264 /* pop args */
2265 SP = PL_stack_base + POPMARK;
2266
2267 PUTBACK;
2268 }
2269
2270 /* now that we have a slf_frame, interpret it! */
2271 /* we use a callback system not to make the code needlessly */
2272 /* complicated, but so we can run multiple perl coros from one cctx */
2273
2274 do
2275 {
2276 struct coro_transfer_args ta;
2277
2278 slf_frame.prepare (aTHX_ &ta);
2279 TRANSFER (ta, 0);
2280
2281 checkmark = PL_stack_sp - PL_stack_base;
2282 }
2283 while (slf_frame.check (aTHX_ &slf_frame));
2284
2285 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2286
2287 /* exception handling */
2288 if (expect_false (CORO_THROW))
2289 {
2290 SV *exception = sv_2mortal (CORO_THROW);
2291
2292 CORO_THROW = 0;
2293 sv_setsv (ERRSV, exception);
2294 croak (0);
2295 }
2296
2297 /* return value handling - mostly like entersub */
2298 /* make sure we put something on the stack in scalar context */
2299 if (GIMME_V == G_SCALAR)
2300 {
2301 dSP;
2302 SV **bot = PL_stack_base + checkmark;
2303
2304 if (sp == bot) /* too few, push undef */
2305 bot [1] = &PL_sv_undef;
2306 else if (sp != bot + 1) /* too many, take last one */
2307 bot [1] = *sp;
2308
2309 SP = bot + 1;
2310
2311 PUTBACK;
2312 }
2313
2314 return NORMAL;
2315}
2316
2317static void
2318api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2319{
2320 int i;
2321 SV **arg = PL_stack_base + ax;
2322 int items = PL_stack_sp - arg + 1;
2323
2324 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2325
2326 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2327 && PL_op->op_ppaddr != pp_slf)
2328 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2329
2330 CvFLAGS (cv) |= CVf_SLF;
2331 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2332 slf_cv = cv;
2333
2334 /* we patch the op, and then re-run the whole call */
2335 /* we have to put the same argument on the stack for this to work */
2336 /* and this will be done by pp_restore */
2337 slf_restore.op_next = (OP *)&slf_restore;
2338 slf_restore.op_type = OP_CUSTOM;
2339 slf_restore.op_ppaddr = pp_restore;
2340 slf_restore.op_first = PL_op;
2341
2342 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2343
2344 if (PL_op->op_flags & OPf_STACKED)
2345 {
2346 if (items > slf_arga)
2347 {
2348 slf_arga = items;
2349 free (slf_argv);
2350 slf_argv = malloc (slf_arga * sizeof (SV *));
2351 }
2352
2353 slf_argc = items;
2354
2355 for (i = 0; i < items; ++i)
2356 slf_argv [i] = SvREFCNT_inc (arg [i]);
2357 }
2358 else
2359 slf_argc = 0;
2360
2361 PL_op->op_ppaddr = pp_slf;
2362 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2363
2364 PL_op = (OP *)&slf_restore;
2365}
2366
2367/*****************************************************************************/
2368/* dynamic wind */
2369
2370static void
2371on_enterleave_call (pTHX_ SV *cb)
2372{
2373 dSP;
2374
2375 PUSHSTACK;
2376
2377 PUSHMARK (SP);
2378 PUTBACK;
2379 call_sv (cb, G_VOID | G_DISCARD);
2380 SPAGAIN;
2381
2382 POPSTACK;
2383}
2384
2385static SV *
2386coro_avp_pop_and_free (pTHX_ AV **avp)
2387{
2388 AV *av = *avp;
2389 SV *res = av_pop (av);
2390
2391 if (AvFILLp (av) < 0)
2392 {
2393 *avp = 0;
2394 SvREFCNT_dec (av);
2395 }
2396
2397 return res;
2398}
2399
2400static void
2401coro_pop_on_enter (pTHX_ void *coro)
2402{
2403 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2404 SvREFCNT_dec (cb);
2405}
2406
2407static void
2408coro_pop_on_leave (pTHX_ void *coro)
2409{
2410 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2411 on_enterleave_call (aTHX_ sv_2mortal (cb));
2412}
1652 2413
1653/*****************************************************************************/ 2414/*****************************************************************************/
1654/* PerlIO::cede */ 2415/* PerlIO::cede */
1655 2416
1656typedef struct 2417typedef struct
… …
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2445 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime (); 2446 double now = nvtime ();
1686 2447
1687 if (now >= self->next) 2448 if (now >= self->next)
1688 { 2449 {
1689 api_cede (); 2450 api_cede (aTHX);
1690 self->next = now + self->every; 2451 self->next = now + self->every;
1691 } 2452 }
1692 2453
1693 return PerlIOBuf_flush (aTHX_ f); 2454 return PerlIOBuf_flush (aTHX_ f);
1694} 2455}
… …
1723 PerlIOBuf_get_ptr, 2484 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt, 2485 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt, 2486 PerlIOBuf_set_ptrcnt,
1726}; 2487};
1727 2488
2489/*****************************************************************************/
2490/* Coro::Semaphore & Coro::Signal */
2491
2492static SV *
2493coro_waitarray_new (pTHX_ int count)
2494{
2495 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2496 AV *av = newAV ();
2497 SV **ary;
2498
2499 /* unfortunately, building manually saves memory */
2500 Newx (ary, 2, SV *);
2501 AvALLOC (av) = ary;
2502#if PERL_VERSION_ATLEAST (5,10,0)
2503 AvARRAY (av) = ary;
2504#else
2505 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2506 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2507 SvPVX ((SV *)av) = (char *)ary;
2508#endif
2509 AvMAX (av) = 1;
2510 AvFILLp (av) = 0;
2511 ary [0] = newSViv (count);
2512
2513 return newRV_noinc ((SV *)av);
2514}
2515
2516/* semaphore */
2517
2518static void
2519coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2520{
2521 SV *count_sv = AvARRAY (av)[0];
2522 IV count = SvIVX (count_sv);
2523
2524 count += adjust;
2525 SvIVX (count_sv) = count;
2526
2527 /* now wake up as many waiters as are expected to lock */
2528 while (count > 0 && AvFILLp (av) > 0)
2529 {
2530 SV *cb;
2531
2532 /* swap first two elements so we can shift a waiter */
2533 AvARRAY (av)[0] = AvARRAY (av)[1];
2534 AvARRAY (av)[1] = count_sv;
2535 cb = av_shift (av);
2536
2537 if (SvOBJECT (cb))
2538 {
2539 api_ready (aTHX_ cb);
2540 --count;
2541 }
2542 else if (SvTYPE (cb) == SVt_PVCV)
2543 {
2544 dSP;
2545 PUSHMARK (SP);
2546 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2547 PUTBACK;
2548 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2549 }
2550
2551 SvREFCNT_dec (cb);
2552 }
2553}
2554
2555static void
2556coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2557{
2558 /* call $sem->adjust (0) to possibly wake up some other waiters */
2559 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2560}
2561
2562static int
2563slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2564{
2565 AV *av = (AV *)frame->data;
2566 SV *count_sv = AvARRAY (av)[0];
2567
2568 /* if we are about to throw, don't actually acquire the lock, just throw */
2569 if (CORO_THROW)
2570 return 0;
2571 else if (SvIVX (count_sv) > 0)
2572 {
2573 SvSTATE_current->on_destroy = 0;
2574
2575 if (acquire)
2576 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2577 else
2578 coro_semaphore_adjust (aTHX_ av, 0);
2579
2580 return 0;
2581 }
2582 else
2583 {
2584 int i;
2585 /* if we were woken up but can't down, we look through the whole */
2586 /* waiters list and only add us if we aren't in there already */
2587 /* this avoids some degenerate memory usage cases */
2588
2589 for (i = 1; i <= AvFILLp (av); ++i)
2590 if (AvARRAY (av)[i] == SvRV (coro_current))
2591 return 1;
2592
2593 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2594 return 1;
2595 }
2596}
2597
2598static int
2599slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2600{
2601 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2602}
2603
2604static int
2605slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2606{
2607 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2608}
2609
2610static void
2611slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2612{
2613 AV *av = (AV *)SvRV (arg [0]);
2614
2615 if (SvIVX (AvARRAY (av)[0]) > 0)
2616 {
2617 frame->data = (void *)av;
2618 frame->prepare = prepare_nop;
2619 }
2620 else
2621 {
2622 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2623
2624 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2625 frame->prepare = prepare_schedule;
2626
2627 /* to avoid race conditions when a woken-up coro gets terminated */
2628 /* we arrange for a temporary on_destroy that calls adjust (0) */
2629 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2630 }
2631}
2632
2633static void
2634slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2635{
2636 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2637 frame->check = slf_check_semaphore_down;
2638}
2639
2640static void
2641slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2642{
2643 if (items >= 2)
2644 {
2645 /* callback form */
2646 AV *av = (AV *)SvRV (arg [0]);
2647 SV *cb_cv = s_get_cv_croak (arg [1]);
2648
2649 av_push (av, SvREFCNT_inc_NN (cb_cv));
2650
2651 if (SvIVX (AvARRAY (av)[0]) > 0)
2652 coro_semaphore_adjust (aTHX_ av, 0);
2653
2654 frame->prepare = prepare_nop;
2655 frame->check = slf_check_nop;
2656 }
2657 else
2658 {
2659 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2660 frame->check = slf_check_semaphore_wait;
2661 }
2662}
2663
2664/* signal */
2665
2666static void
2667coro_signal_wake (pTHX_ AV *av, int count)
2668{
2669 SvIVX (AvARRAY (av)[0]) = 0;
2670
2671 /* now signal count waiters */
2672 while (count > 0 && AvFILLp (av) > 0)
2673 {
2674 SV *cb;
2675
2676 /* swap first two elements so we can shift a waiter */
2677 cb = AvARRAY (av)[0];
2678 AvARRAY (av)[0] = AvARRAY (av)[1];
2679 AvARRAY (av)[1] = cb;
2680
2681 cb = av_shift (av);
2682
2683 if (SvTYPE (cb) == SVt_PVCV)
2684 {
2685 dSP;
2686 PUSHMARK (SP);
2687 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2688 PUTBACK;
2689 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2690 }
2691 else
2692 {
2693 api_ready (aTHX_ cb);
2694 sv_setiv (cb, 0); /* signal waiter */
2695 }
2696
2697 SvREFCNT_dec (cb);
2698
2699 --count;
2700 }
2701}
2702
2703static int
2704slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2705{
2706 /* if we are about to throw, also stop waiting */
2707 return SvROK ((SV *)frame->data) && !CORO_THROW;
2708}
2709
2710static void
2711slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2712{
2713 AV *av = (AV *)SvRV (arg [0]);
2714
2715 if (items >= 2)
2716 {
2717 SV *cb_cv = s_get_cv_croak (arg [1]);
2718 av_push (av, SvREFCNT_inc_NN (cb_cv));
2719
2720 if (SvIVX (AvARRAY (av)[0]))
2721 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2722
2723 frame->prepare = prepare_nop;
2724 frame->check = slf_check_nop;
2725 }
2726 else if (SvIVX (AvARRAY (av)[0]))
2727 {
2728 SvIVX (AvARRAY (av)[0]) = 0;
2729 frame->prepare = prepare_nop;
2730 frame->check = slf_check_nop;
2731 }
2732 else
2733 {
2734 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2735
2736 av_push (av, waiter);
2737
2738 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2739 frame->prepare = prepare_schedule;
2740 frame->check = slf_check_signal_wait;
2741 }
2742}
2743
2744/*****************************************************************************/
2745/* Coro::AIO */
2746
2747#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2748
2749/* helper storage struct */
2750struct io_state
2751{
2752 int errorno;
2753 I32 laststype; /* U16 in 5.10.0 */
2754 int laststatval;
2755 Stat_t statcache;
2756};
2757
2758static void
2759coro_aio_callback (pTHX_ CV *cv)
2760{
2761 dXSARGS;
2762 AV *state = (AV *)S_GENSUB_ARG;
2763 SV *coro = av_pop (state);
2764 SV *data_sv = newSV (sizeof (struct io_state));
2765
2766 av_extend (state, items - 1);
2767
2768 sv_upgrade (data_sv, SVt_PV);
2769 SvCUR_set (data_sv, sizeof (struct io_state));
2770 SvPOK_only (data_sv);
2771
2772 {
2773 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2774
2775 data->errorno = errno;
2776 data->laststype = PL_laststype;
2777 data->laststatval = PL_laststatval;
2778 data->statcache = PL_statcache;
2779 }
2780
2781 /* now build the result vector out of all the parameters and the data_sv */
2782 {
2783 int i;
2784
2785 for (i = 0; i < items; ++i)
2786 av_push (state, SvREFCNT_inc_NN (ST (i)));
2787 }
2788
2789 av_push (state, data_sv);
2790
2791 api_ready (aTHX_ coro);
2792 SvREFCNT_dec (coro);
2793 SvREFCNT_dec ((AV *)state);
2794}
2795
2796static int
2797slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2798{
2799 AV *state = (AV *)frame->data;
2800
2801 /* if we are about to throw, return early */
2802 /* this does not cancel the aio request, but at least */
2803 /* it quickly returns */
2804 if (CORO_THROW)
2805 return 0;
2806
2807 /* one element that is an RV? repeat! */
2808 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2809 return 1;
2810
2811 /* restore status */
2812 {
2813 SV *data_sv = av_pop (state);
2814 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2815
2816 errno = data->errorno;
2817 PL_laststype = data->laststype;
2818 PL_laststatval = data->laststatval;
2819 PL_statcache = data->statcache;
2820
2821 SvREFCNT_dec (data_sv);
2822 }
2823
2824 /* push result values */
2825 {
2826 dSP;
2827 int i;
2828
2829 EXTEND (SP, AvFILLp (state) + 1);
2830 for (i = 0; i <= AvFILLp (state); ++i)
2831 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2832
2833 PUTBACK;
2834 }
2835
2836 return 0;
2837}
2838
2839static void
2840slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2841{
2842 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2843 SV *coro_hv = SvRV (coro_current);
2844 struct coro *coro = SvSTATE_hv (coro_hv);
2845
2846 /* put our coroutine id on the state arg */
2847 av_push (state, SvREFCNT_inc_NN (coro_hv));
2848
2849 /* first see whether we have a non-zero priority and set it as AIO prio */
2850 if (coro->prio)
2851 {
2852 dSP;
2853
2854 static SV *prio_cv;
2855 static SV *prio_sv;
2856
2857 if (expect_false (!prio_cv))
2858 {
2859 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2860 prio_sv = newSViv (0);
2861 }
2862
2863 PUSHMARK (SP);
2864 sv_setiv (prio_sv, coro->prio);
2865 XPUSHs (prio_sv);
2866
2867 PUTBACK;
2868 call_sv (prio_cv, G_VOID | G_DISCARD);
2869 }
2870
2871 /* now call the original request */
2872 {
2873 dSP;
2874 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2875 int i;
2876
2877 PUSHMARK (SP);
2878
2879 /* first push all args to the stack */
2880 EXTEND (SP, items + 1);
2881
2882 for (i = 0; i < items; ++i)
2883 PUSHs (arg [i]);
2884
2885 /* now push the callback closure */
2886 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2887
2888 /* now call the AIO function - we assume our request is uncancelable */
2889 PUTBACK;
2890 call_sv ((SV *)req, G_VOID | G_DISCARD);
2891 }
2892
2893 /* now that the requets is going, we loop toll we have a result */
2894 frame->data = (void *)state;
2895 frame->prepare = prepare_schedule;
2896 frame->check = slf_check_aio_req;
2897}
2898
2899static void
2900coro_aio_req_xs (pTHX_ CV *cv)
2901{
2902 dXSARGS;
2903
2904 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2905
2906 XSRETURN_EMPTY;
2907}
2908
2909/*****************************************************************************/
2910
2911#if CORO_CLONE
2912# include "clone.c"
2913#endif
1728 2914
1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2915MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1730 2916
1731PROTOTYPES: DISABLE 2917PROTOTYPES: DISABLE
1732 2918
1733BOOT: 2919BOOT:
1734{ 2920{
1735#ifdef USE_ITHREADS 2921#ifdef USE_ITHREADS
1736 MUTEX_INIT (&coro_mutex); 2922# if CORO_PTHREAD
2923 coro_thx = PERL_GET_CONTEXT;
2924# endif
1737#endif 2925#endif
1738 BOOT_PAGESIZE; 2926 BOOT_PAGESIZE;
2927
2928 cctx_current = cctx_new_empty ();
1739 2929
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2930 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2931 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1742 2932
1743 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2933 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1759 main_top_env = PL_top_env; 2949 main_top_env = PL_top_env;
1760 2950
1761 while (main_top_env->je_prev) 2951 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev; 2952 main_top_env = main_top_env->je_prev;
1763 2953
2954 {
2955 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2956
2957 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2958 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2959
2960 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2961 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2962 }
2963
1764 coroapi.ver = CORO_API_VERSION; 2964 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION; 2965 coroapi.rev = CORO_API_REVISION;
2966
1766 coroapi.transfer = api_transfer; 2967 coroapi.transfer = api_transfer;
2968
2969 coroapi.sv_state = SvSTATE_;
2970 coroapi.execute_slf = api_execute_slf;
2971 coroapi.prepare_nop = prepare_nop;
2972 coroapi.prepare_schedule = prepare_schedule;
2973 coroapi.prepare_cede = prepare_cede;
2974 coroapi.prepare_cede_notself = prepare_cede_notself;
1767 2975
1768 { 2976 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2977 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770 2978
1771 if (!svp) croak ("Time::HiRes is required"); 2979 if (!svp) croak ("Time::HiRes is required");
1772 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 2980 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1773 2981
1774 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 2982 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2983
2984 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2985 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
1775 } 2986 }
1776 2987
1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2988 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1778} 2989}
1779 2990
1780SV * 2991SV *
1781new (char *klass, ...) 2992new (char *klass, ...)
2993 ALIAS:
2994 Coro::new = 1
1782 CODE: 2995 CODE:
1783{ 2996{
1784 struct coro *coro; 2997 struct coro *coro;
1785 MAGIC *mg; 2998 MAGIC *mg;
1786 HV *hv; 2999 HV *hv;
3000 SV *cb;
1787 int i; 3001 int i;
3002
3003 if (items > 1)
3004 {
3005 cb = s_get_cv_croak (ST (1));
3006
3007 if (!ix)
3008 {
3009 if (CvISXSUB (cb))
3010 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3011
3012 if (!CvROOT (cb))
3013 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3014 }
3015 }
1788 3016
1789 Newz (0, coro, 1, struct coro); 3017 Newz (0, coro, 1, struct coro);
1790 coro->args = newAV (); 3018 coro->args = newAV ();
1791 coro->flags = CF_NEW; 3019 coro->flags = CF_NEW;
1792 3020
… …
1797 coro->hv = hv = newHV (); 3025 coro->hv = hv = newHV ();
1798 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 3026 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1799 mg->mg_flags |= MGf_DUP; 3027 mg->mg_flags |= MGf_DUP;
1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1801 3029
3030 if (items > 1)
3031 {
1802 av_extend (coro->args, items - 1); 3032 av_extend (coro->args, items - 1 + ix - 1);
3033
3034 if (ix)
3035 {
3036 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3037 cb = (SV *)cv_coro_run;
3038 }
3039
3040 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3041
1803 for (i = 1; i < items; i++) 3042 for (i = 2; i < items; i++)
1804 av_push (coro->args, newSVsv (ST (i))); 3043 av_push (coro->args, newSVsv (ST (i)));
3044 }
1805} 3045}
1806 OUTPUT: 3046 OUTPUT:
1807 RETVAL 3047 RETVAL
1808 3048
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
1812void 3049void
1813_set_stacklevel (...) 3050transfer (...)
1814 ALIAS: 3051 PROTOTYPE: $$
1815 Coro::State::transfer = 1 3052 CODE:
1816 Coro::schedule = 2 3053 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1817 Coro::cede = 3
1818 Coro::cede_notself = 4
1819 CODE:
1820{
1821 struct transfer_args ta;
1822
1823 PUTBACK;
1824 switch (ix)
1825 {
1826 case 0:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1828 ta.next = 0;
1829 break;
1830
1831 case 1:
1832 if (items != 2)
1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1834
1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1836 break;
1837
1838 case 2:
1839 prepare_schedule (aTHX_ &ta);
1840 break;
1841
1842 case 3:
1843 prepare_cede (aTHX_ &ta);
1844 break;
1845
1846 case 4:
1847 if (!prepare_cede_notself (aTHX_ &ta))
1848 XSRETURN_EMPTY;
1849
1850 break;
1851 }
1852 SPAGAIN;
1853
1854 BARRIER;
1855 PUTBACK;
1856 TRANSFER (ta, 0);
1857 SPAGAIN; /* might be the sp of a different coroutine now */
1858 /* be extra careful not to ever do anything after TRANSFER */
1859}
1860 3054
1861bool 3055bool
1862_destroy (SV *coro_sv) 3056_destroy (SV *coro_sv)
1863 CODE: 3057 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3058 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1869_exit (int code) 3063_exit (int code)
1870 PROTOTYPE: $ 3064 PROTOTYPE: $
1871 CODE: 3065 CODE:
1872 _exit (code); 3066 _exit (code);
1873 3067
3068SV *
3069clone (Coro::State coro)
3070 CODE:
3071{
3072#if CORO_CLONE
3073 struct coro *ncoro = coro_clone (aTHX_ coro);
3074 MAGIC *mg;
3075 /* TODO: too much duplication */
3076 ncoro->hv = newHV ();
3077 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3078 mg->mg_flags |= MGf_DUP;
3079 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3080#else
3081 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3082#endif
3083}
3084 OUTPUT:
3085 RETVAL
3086
1874int 3087int
1875cctx_stacksize (int new_stacksize = 0) 3088cctx_stacksize (int new_stacksize = 0)
3089 PROTOTYPE: ;$
1876 CODE: 3090 CODE:
1877 RETVAL = coro_stacksize; 3091 RETVAL = cctx_stacksize;
1878 if (new_stacksize) 3092 if (new_stacksize)
3093 {
1879 coro_stacksize = new_stacksize; 3094 cctx_stacksize = new_stacksize;
3095 ++cctx_gen;
3096 }
1880 OUTPUT: 3097 OUTPUT:
1881 RETVAL 3098 RETVAL
1882 3099
1883int 3100int
3101cctx_max_idle (int max_idle = 0)
3102 PROTOTYPE: ;$
3103 CODE:
3104 RETVAL = cctx_max_idle;
3105 if (max_idle > 1)
3106 cctx_max_idle = max_idle;
3107 OUTPUT:
3108 RETVAL
3109
3110int
1884cctx_count () 3111cctx_count ()
3112 PROTOTYPE:
1885 CODE: 3113 CODE:
1886 RETVAL = cctx_count; 3114 RETVAL = cctx_count;
1887 OUTPUT: 3115 OUTPUT:
1888 RETVAL 3116 RETVAL
1889 3117
1890int 3118int
1891cctx_idle () 3119cctx_idle ()
3120 PROTOTYPE:
1892 CODE: 3121 CODE:
1893 RETVAL = cctx_idle; 3122 RETVAL = cctx_idle;
1894 OUTPUT: 3123 OUTPUT:
1895 RETVAL 3124 RETVAL
1896 3125
1897void 3126void
1898list () 3127list ()
3128 PROTOTYPE:
1899 PPCODE: 3129 PPCODE:
1900{ 3130{
1901 struct coro *coro; 3131 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next) 3132 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv) 3133 if (coro->hv)
… …
1910 eval = 1 3140 eval = 1
1911 CODE: 3141 CODE:
1912{ 3142{
1913 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3143 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1914 { 3144 {
1915 struct coro temp; 3145 struct coro *current = SvSTATE_current;
1916 3146
1917 if (!(coro->flags & CF_RUNNING)) 3147 if (current != coro)
1918 { 3148 {
1919 PUTBACK; 3149 PUTBACK;
1920 save_perl (aTHX_ &temp); 3150 save_perl (aTHX_ current);
1921 load_perl (aTHX_ coro); 3151 load_perl (aTHX_ coro);
3152 SPAGAIN;
1922 } 3153 }
1923 3154
1924 {
1925 dSP;
1926 ENTER;
1927 SAVETMPS;
1928 PUTBACK;
1929 PUSHSTACK; 3155 PUSHSTACK;
3156
1930 PUSHMARK (SP); 3157 PUSHMARK (SP);
3158 PUTBACK;
1931 3159
1932 if (ix) 3160 if (ix)
1933 eval_sv (coderef, 0); 3161 eval_sv (coderef, 0);
1934 else 3162 else
1935 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3163 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1936 3164
1937 POPSTACK; 3165 POPSTACK;
1938 SPAGAIN; 3166 SPAGAIN;
1939 FREETMPS;
1940 LEAVE;
1941 PUTBACK;
1942 }
1943 3167
1944 if (!(coro->flags & CF_RUNNING)) 3168 if (current != coro)
1945 { 3169 {
3170 PUTBACK;
1946 save_perl (aTHX_ coro); 3171 save_perl (aTHX_ coro);
1947 load_perl (aTHX_ &temp); 3172 load_perl (aTHX_ current);
1948 SPAGAIN; 3173 SPAGAIN;
1949 } 3174 }
1950 } 3175 }
1951} 3176}
1952 3177
… …
1956 ALIAS: 3181 ALIAS:
1957 is_ready = CF_READY 3182 is_ready = CF_READY
1958 is_running = CF_RUNNING 3183 is_running = CF_RUNNING
1959 is_new = CF_NEW 3184 is_new = CF_NEW
1960 is_destroyed = CF_DESTROYED 3185 is_destroyed = CF_DESTROYED
3186 is_suspended = CF_SUSPENDED
1961 CODE: 3187 CODE:
1962 RETVAL = boolSV (coro->flags & ix); 3188 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT: 3189 OUTPUT:
1964 RETVAL 3190 RETVAL
1965 3191
1966void 3192void
3193throw (Coro::State self, SV *throw = &PL_sv_undef)
3194 PROTOTYPE: $;$
3195 CODE:
3196{
3197 struct coro *current = SvSTATE_current;
3198 SV **throwp = self == current ? &CORO_THROW : &self->except;
3199 SvREFCNT_dec (*throwp);
3200 SvGETMAGIC (throw);
3201 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3202}
3203
3204void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3205api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3206 PROTOTYPE: $;$
3207 C_ARGS: aTHX_ coro, flags
1968 3208
1969SV * 3209SV *
1970has_cctx (Coro::State coro) 3210has_cctx (Coro::State coro)
1971 PROTOTYPE: $ 3211 PROTOTYPE: $
1972 CODE: 3212 CODE:
1973 RETVAL = boolSV (!!coro->cctx); 3213 /* maybe manage the running flag differently */
3214 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1974 OUTPUT: 3215 OUTPUT:
1975 RETVAL 3216 RETVAL
1976 3217
1977int 3218int
1978is_traced (Coro::State coro) 3219is_traced (Coro::State coro)
… …
1980 CODE: 3221 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3222 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT: 3223 OUTPUT:
1983 RETVAL 3224 RETVAL
1984 3225
1985IV 3226UV
1986rss (Coro::State coro) 3227rss (Coro::State coro)
1987 PROTOTYPE: $ 3228 PROTOTYPE: $
1988 ALIAS: 3229 ALIAS:
1989 usecount = 1 3230 usecount = 1
1990 CODE: 3231 CODE:
… …
1996 OUTPUT: 3237 OUTPUT:
1997 RETVAL 3238 RETVAL
1998 3239
1999void 3240void
2000force_cctx () 3241force_cctx ()
3242 PROTOTYPE:
2001 CODE: 3243 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0; 3244 cctx_current->idle_sp = 0;
2004
2005void
2006throw (Coro::State self, SV *throw = &PL_sv_undef)
2007 PROTOTYPE: $;$
2008 CODE:
2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2011 3245
2012void 3246void
2013swap_defsv (Coro::State self) 3247swap_defsv (Coro::State self)
2014 PROTOTYPE: $ 3248 PROTOTYPE: $
2015 ALIAS: 3249 ALIAS:
2016 swap_defav = 1 3250 swap_defav = 1
2017 CODE: 3251 CODE:
2018 if (!self->slot) 3252 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state"); 3253 croak ("cannot swap state with coroutine that has no saved state,");
2020 else 3254 else
2021 { 3255 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3256 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3257 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024 3258
2025 SV *tmp = *src; *src = *dst; *dst = tmp; 3259 SV *tmp = *src; *src = *dst; *dst = tmp;
2026 } 3260 }
2027 3261
3262void
3263cancel (Coro::State self)
3264 CODE:
3265 coro_state_destroy (aTHX_ self);
3266 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3267
3268
3269SV *
3270enable_times (int enabled = enable_times)
3271 CODE:
3272{
3273 RETVAL = boolSV (enable_times);
3274
3275 if (enabled != enable_times)
3276 {
3277 enable_times = enabled;
3278
3279 coro_times_update ();
3280 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3281 }
3282}
3283 OUTPUT:
3284 RETVAL
3285
3286void
3287times (Coro::State self)
3288 PPCODE:
3289{
3290 struct coro *current = SvSTATE (coro_current);
3291
3292 if (expect_false (current == self))
3293 {
3294 coro_times_update ();
3295 coro_times_add (SvSTATE (coro_current));
3296 }
3297
3298 EXTEND (SP, 2);
3299 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3300 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3301
3302 if (expect_false (current == self))
3303 coro_times_sub (SvSTATE (coro_current));
3304}
3305
2028MODULE = Coro::State PACKAGE = Coro 3306MODULE = Coro::State PACKAGE = Coro
2029 3307
2030BOOT: 3308BOOT:
2031{ 3309{
2032 int i;
2033
2034 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2035 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3310 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2036 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3311 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2037 3312 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3313 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2038 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3314 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2039 SvREADONLY_on (coro_current); 3315 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3316 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3317 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3318 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3319
3320 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3321 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3322 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3323 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
2040 3324
2041 coro_stash = gv_stashpv ("Coro", TRUE); 3325 coro_stash = gv_stashpv ("Coro", TRUE);
2042 3326
2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3327 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3328 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3329 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3330 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3331 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3332 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2049
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV ();
2052 3333
2053 { 3334 {
2054 SV *sv = perl_get_sv ("Coro::API", TRUE); 3335 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2056 3336
2057 coroapi.schedule = api_schedule; 3337 coroapi.schedule = api_schedule;
3338 coroapi.schedule_to = api_schedule_to;
2058 coroapi.cede = api_cede; 3339 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself; 3340 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready; 3341 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready; 3342 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready; 3343 coroapi.nready = coro_nready;
2063 coroapi.current = coro_current; 3344 coroapi.current = coro_current;
2064 3345
2065 GCoroAPI = &coroapi; 3346 /*GCoroAPI = &coroapi;*/
2066 sv_setiv (sv, (IV)&coroapi); 3347 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv); 3348 SvREADONLY_on (sv);
2068 } 3349 }
2069} 3350}
3351
3352void
3353terminate (...)
3354 CODE:
3355 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3356
3357void
3358schedule (...)
3359 CODE:
3360 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3361
3362void
3363schedule_to (...)
3364 CODE:
3365 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3366
3367void
3368cede_to (...)
3369 CODE:
3370 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3371
3372void
3373cede (...)
3374 CODE:
3375 CORO_EXECUTE_SLF_XS (slf_init_cede);
3376
3377void
3378cede_notself (...)
3379 CODE:
3380 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2070 3381
2071void 3382void
2072_set_current (SV *current) 3383_set_current (SV *current)
2073 PROTOTYPE: $ 3384 PROTOTYPE: $
2074 CODE: 3385 CODE:
2075 SvREFCNT_dec (SvRV (coro_current)); 3386 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3387 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2077 3388
2078void 3389void
2079_set_readyhook (SV *hook) 3390_set_readyhook (SV *hook)
2080 PROTOTYPE: $ 3391 PROTOTYPE: $
2081 CODE: 3392 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook); 3393 SvREFCNT_dec (coro_readyhook);
3394 SvGETMAGIC (hook);
3395 if (SvOK (hook))
3396 {
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3397 coro_readyhook = newSVsv (hook);
2085 UNLOCK; 3398 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3399 }
3400 else
3401 {
3402 coro_readyhook = 0;
3403 CORO_READYHOOK = 0;
3404 }
2086 3405
2087int 3406int
2088prio (Coro::State coro, int newprio = 0) 3407prio (Coro::State coro, int newprio = 0)
3408 PROTOTYPE: $;$
2089 ALIAS: 3409 ALIAS:
2090 nice = 1 3410 nice = 1
2091 CODE: 3411 CODE:
2092{ 3412{
2093 RETVAL = coro->prio; 3413 RETVAL = coro->prio;
… …
2095 if (items > 1) 3415 if (items > 1)
2096 { 3416 {
2097 if (ix) 3417 if (ix)
2098 newprio = coro->prio - newprio; 3418 newprio = coro->prio - newprio;
2099 3419
2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3420 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3421 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2102 3422
2103 coro->prio = newprio; 3423 coro->prio = newprio;
2104 } 3424 }
2105} 3425}
2106 OUTPUT: 3426 OUTPUT:
… …
2108 3428
2109SV * 3429SV *
2110ready (SV *self) 3430ready (SV *self)
2111 PROTOTYPE: $ 3431 PROTOTYPE: $
2112 CODE: 3432 CODE:
2113 RETVAL = boolSV (api_ready (self)); 3433 RETVAL = boolSV (api_ready (aTHX_ self));
2114 OUTPUT: 3434 OUTPUT:
2115 RETVAL 3435 RETVAL
2116 3436
2117int 3437int
2118nready (...) 3438nready (...)
… …
2120 CODE: 3440 CODE:
2121 RETVAL = coro_nready; 3441 RETVAL = coro_nready;
2122 OUTPUT: 3442 OUTPUT:
2123 RETVAL 3443 RETVAL
2124 3444
2125# for async_pool speedup
2126void 3445void
2127_pool_1 (SV *cb) 3446suspend (Coro::State self)
3447 PROTOTYPE: $
2128 CODE: 3448 CODE:
2129{ 3449 self->flags |= CF_SUSPENDED;
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current);
2132 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av;
2135 int i, len;
2136 3450
2137 if (!invoke) 3451void
3452resume (Coro::State self)
3453 PROTOTYPE: $
3454 CODE:
3455 self->flags &= ~CF_SUSPENDED;
3456
3457void
3458_pool_handler (...)
3459 CODE:
3460 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3461
3462void
3463async_pool (SV *cv, ...)
3464 PROTOTYPE: &@
3465 PPCODE:
3466{
3467 HV *hv = (HV *)av_pop (av_async_pool);
3468 AV *av = newAV ();
3469 SV *cb = ST (0);
3470 int i;
3471
3472 av_extend (av, items - 2);
3473 for (i = 1; i < items; ++i)
3474 av_push (av, SvREFCNT_inc_NN (ST (i)));
3475
3476 if ((SV *)hv == &PL_sv_undef)
2138 { 3477 {
2139 SV *old = PL_diehook; 3478 PUSHMARK (SP);
2140 PL_diehook = 0; 3479 EXTEND (SP, 2);
2141 SvREFCNT_dec (old); 3480 PUSHs (sv_Coro);
2142 croak ("\3async_pool terminate\2\n"); 3481 PUSHs ((SV *)cv_pool_handler);
3482 PUTBACK;
3483 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3484 SPAGAIN;
3485
3486 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
2143 } 3487 }
2144 3488
2145 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2147
2148 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150
2151 invoke_av = (AV *)SvRV (invoke);
2152 len = av_len (invoke_av);
2153
2154 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2155
2156 if (len > 0)
2157 { 3489 {
2158 av_fill (defav, len - 1); 3490 struct coro *coro = SvSTATE_hv (hv);
2159 for (i = 0; i < len; ++i) 3491
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3492 assert (!coro->invoke_cb);
3493 assert (!coro->invoke_av);
3494 coro->invoke_cb = SvREFCNT_inc (cb);
3495 coro->invoke_av = av;
2161 } 3496 }
2162 3497
3498 api_ready (aTHX_ (SV *)hv);
3499
3500 if (GIMME_V != G_VOID)
3501 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3502 else
2163 SvREFCNT_dec (invoke); 3503 SvREFCNT_dec (hv);
2164} 3504}
2165 3505
2166void 3506SV *
2167_pool_2 (SV *cb) 3507rouse_cb ()
3508 PROTOTYPE:
2168 CODE: 3509 CODE:
2169{ 3510 RETVAL = coro_new_rouse_cb (aTHX);
2170 struct coro *coro = SvSTATE (coro_current);
2171
2172 sv_setsv (cb, &PL_sv_undef);
2173
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0;
2176
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 {
2180 SV *old = PL_diehook;
2181 PL_diehook = 0;
2182 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n");
2184 }
2185
2186 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189
2190 coro->prio = 0;
2191
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0);
2194
2195 av_push (av_async_pool, newSVsv (coro_current));
2196}
2197
2198#if 0
2199
2200void
2201_generator_call (...)
2202 PROTOTYPE: @
2203 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
2208SV *
2209gensub (SV *sub, ...)
2210 PROTOTYPE: &;@
2211 CODE:
2212{
2213 struct coro *coro;
2214 MAGIC *mg;
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i;
2218
2219 CvGV (ncv) = CvGV (cv);
2220 CvFILE (ncv) = CvFILE (cv);
2221
2222 Newz (0, coro, 1, struct coro);
2223 coro->args = newAV ();
2224 coro->flags = CF_NEW;
2225
2226 av_extend (coro->args, items - 1);
2227 for (i = 1; i < items; i++)
2228 av_push (coro->args, newSVsv (ST (i)));
2229
2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
2240}
2241 OUTPUT: 3511 OUTPUT:
2242 RETVAL 3512 RETVAL
2243 3513
2244#endif 3514void
3515rouse_wait (...)
3516 PROTOTYPE: ;$
3517 PPCODE:
3518 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2245 3519
3520void
3521on_enter (SV *block)
3522 ALIAS:
3523 on_leave = 1
3524 PROTOTYPE: &
3525 CODE:
3526{
3527 struct coro *coro = SvSTATE_current;
3528 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2246 3529
3530 block = s_get_cv_croak (block);
3531
3532 if (!*avp)
3533 *avp = newAV ();
3534
3535 av_push (*avp, SvREFCNT_inc (block));
3536
3537 if (!ix)
3538 on_enterleave_call (aTHX_ block);
3539
3540 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3541 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3542 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3543}
3544
3545
3546MODULE = Coro::State PACKAGE = PerlIO::cede
3547
3548BOOT:
3549 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3550
3551
2247MODULE = Coro::State PACKAGE = Coro::AIO 3552MODULE = Coro::State PACKAGE = Coro::Semaphore
2248 3553
2249SV * 3554SV *
2250_get_state () 3555new (SV *klass, SV *count = 0)
2251 CODE: 3556 CODE:
2252{ 3557{
2253 struct io_state *data; 3558 int semcnt = 1;
2254 3559
2255 RETVAL = newSV (sizeof (struct io_state)); 3560 if (count)
2256 data = (struct io_state *)SvPVX (RETVAL); 3561 {
2257 SvCUR_set (RETVAL, sizeof (struct io_state)); 3562 SvGETMAGIC (count);
2258 SvPOK_only (RETVAL);
2259 3563
2260 data->errorno = errno; 3564 if (SvOK (count))
2261 data->laststype = PL_laststype; 3565 semcnt = SvIV (count);
2262 data->laststatval = PL_laststatval; 3566 }
2263 data->statcache = PL_statcache; 3567
3568 RETVAL = sv_bless (
3569 coro_waitarray_new (aTHX_ semcnt),
3570 GvSTASH (CvGV (cv))
3571 );
2264} 3572}
2265 OUTPUT: 3573 OUTPUT:
2266 RETVAL 3574 RETVAL
2267 3575
3576# helper for Coro::Channel and others
3577SV *
3578_alloc (int count)
3579 CODE:
3580 RETVAL = coro_waitarray_new (aTHX_ count);
3581 OUTPUT:
3582 RETVAL
3583
3584SV *
3585count (SV *self)
3586 CODE:
3587 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3588 OUTPUT:
3589 RETVAL
3590
2268void 3591void
2269_set_state (char *data_) 3592up (SV *self, int adjust = 1)
2270 PROTOTYPE: $ 3593 ALIAS:
3594 adjust = 1
3595 CODE:
3596 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3597
3598void
3599down (...)
3600 CODE:
3601 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3602
3603void
3604wait (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3607
3608void
3609try (SV *self)
3610 PPCODE:
3611{
3612 AV *av = (AV *)SvRV (self);
3613 SV *count_sv = AvARRAY (av)[0];
3614 IV count = SvIVX (count_sv);
3615
3616 if (count > 0)
3617 {
3618 --count;
3619 SvIVX (count_sv) = count;
3620 XSRETURN_YES;
3621 }
3622 else
3623 XSRETURN_NO;
3624}
3625
3626void
3627waiters (SV *self)
3628 PPCODE:
3629{
3630 AV *av = (AV *)SvRV (self);
3631 int wcount = AvFILLp (av) + 1 - 1;
3632
3633 if (GIMME_V == G_SCALAR)
3634 XPUSHs (sv_2mortal (newSViv (wcount)));
3635 else
3636 {
3637 int i;
3638 EXTEND (SP, wcount);
3639 for (i = 1; i <= wcount; ++i)
3640 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3641 }
3642}
3643
3644MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3645
3646void
3647_may_delete (SV *sem, int count, int extra_refs)
3648 PPCODE:
3649{
3650 AV *av = (AV *)SvRV (sem);
3651
3652 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3653 && AvFILLp (av) == 0 /* no waiters, just count */
3654 && SvIV (AvARRAY (av)[0]) == count)
3655 XSRETURN_YES;
3656
3657 XSRETURN_NO;
3658}
3659
3660MODULE = Coro::State PACKAGE = Coro::Signal
3661
3662SV *
3663new (SV *klass)
2271 CODE: 3664 CODE:
2272{ 3665 RETVAL = sv_bless (
2273 struct io_state *data = (void *)data_; 3666 coro_waitarray_new (aTHX_ 0),
3667 GvSTASH (CvGV (cv))
3668 );
3669 OUTPUT:
3670 RETVAL
2274 3671
2275 errno = data->errorno; 3672void
2276 PL_laststype = data->laststype; 3673wait (...)
2277 PL_laststatval = data->laststatval; 3674 CODE:
2278 PL_statcache = data->statcache; 3675 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3676
3677void
3678broadcast (SV *self)
3679 CODE:
3680{
3681 AV *av = (AV *)SvRV (self);
3682 coro_signal_wake (aTHX_ av, AvFILLp (av));
2279} 3683}
3684
3685void
3686send (SV *self)
3687 CODE:
3688{
3689 AV *av = (AV *)SvRV (self);
3690
3691 if (AvFILLp (av))
3692 coro_signal_wake (aTHX_ av, 1);
3693 else
3694 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3695}
3696
3697IV
3698awaited (SV *self)
3699 CODE:
3700 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3701 OUTPUT:
3702 RETVAL
2280 3703
2281 3704
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent 3705MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283 3706
2284BOOT: 3707BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3708 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286 3709
2287SV * 3710void
2288_schedule (...) 3711_schedule (...)
2289 PROTOTYPE: @
2290 CODE: 3712 CODE:
2291{ 3713{
2292 static int incede; 3714 static int incede;
2293 3715
2294 api_cede_notself (); 3716 api_cede_notself (aTHX);
2295 3717
2296 ++incede; 3718 ++incede;
2297 while (coro_nready >= incede && api_cede ()) 3719 while (coro_nready >= incede && api_cede (aTHX))
2298 ; 3720 ;
2299 3721
2300 sv_setsv (sv_activity, &PL_sv_undef); 3722 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede) 3723 if (coro_nready >= incede)
2302 { 3724 {
2303 PUSHMARK (SP); 3725 PUSHMARK (SP);
2304 PUTBACK; 3726 PUTBACK;
2305 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3727 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2306 SPAGAIN;
2307 } 3728 }
2308 3729
2309 --incede; 3730 --incede;
2310} 3731}
2311 3732
2312 3733
2313MODULE = Coro::State PACKAGE = PerlIO::cede 3734MODULE = Coro::State PACKAGE = Coro::AIO
2314 3735
2315BOOT: 3736void
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3737_register (char *target, char *proto, SV *req)
3738 CODE:
3739{
3740 SV *req_cv = s_get_cv_croak (req);
3741 /* newXSproto doesn't return the CV on 5.8 */
3742 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3743 sv_setpv ((SV *)slf_cv, proto);
3744 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3745}
3746
3747MODULE = Coro::State PACKAGE = Coro::Select
3748
3749void
3750patch_pp_sselect ()
3751 CODE:
3752 if (!coro_old_pp_sselect)
3753 {
3754 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3755 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3756 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3757 }
3758
3759void
3760unpatch_pp_sselect ()
3761 CODE:
3762 if (coro_old_pp_sselect)
3763 {
3764 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3765 coro_old_pp_sselect = 0;
3766 }
3767
3768

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