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Comparing Coro/Coro/State.xs (file contents):
Revision 1.241 by root, Mon Jul 21 02:39:15 2008 UTC vs.
Revision 1.373 by root, Thu Oct 1 23:51:33 2009 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
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 10
10#include "patchlevel.h" 11#include "schmorp.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#include <assert.h> 15#include <assert.h>
15 16
16#ifdef WIN32 17#ifdef WIN32
17# undef setjmp 18# undef setjmp
18# undef longjmp 19# undef longjmp
19# undef _exit 20# undef _exit
20# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
21#else 22#else
22# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
23#endif 24#endif
24 25
25#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
45# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
46#endif 47#endif
47 48
48#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif 51#endif
54 52
55/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr
67# endif
68# ifndef call_sv
69# define call_sv perl_call_sv
70# endif
71# ifndef get_sv
72# define get_sv perl_get_sv
73# endif
74# ifndef get_cv
75# define get_cv perl_get_cv
76# endif
77# ifndef IS_PADGV
78# define IS_PADGV(v) 0
79# endif
80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0
82# endif
83#endif
84
85/* 5.8.8 */
86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102 55
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD 57# undef CORO_STACKGUARD
105#endif 58#endif
106 59
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 67#endif
115 68
116/* 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
117 * 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
118#define dSTACKLEVEL volatile char stacklevel 75# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
120 78
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
122 80
123#if __GNUC__ >= 3 81#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
127#else 85#else
128# define attribute(x) 86# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 87# define expect(expr,value) (expr)
88# define INLINE static
131#endif 89#endif
132 90
133#define expect_false(expr) expect ((expr) != 0, 0) 91#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 92#define expect_true(expr) expect ((expr) != 0, 1)
135 93
136#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
137 95
138#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
139 98
140#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 100# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif 103#endif
148 104
149/* helper storage struct for Coro::AIO */ 105#ifdef __linux
150struct io_state 106# include <time.h> /* for timespec */
151{ 107# include <syscall.h> /* for SYS_* */
152 int errorno; 108# ifdef SYS_clock_gettime
153 I32 laststype; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
154 int laststatval; 110# define CORO_CLOCK_MONOTONIC 1
155 Stat_t statcache; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
156}; 112# endif
113#endif
157 114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
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;
158static size_t coro_stacksize = CORO_STACKSIZE; 123static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 126static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
163static 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 */
164 133
165static GV *irsgv; /* $/ */ 134static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 135static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 136static SV *rv_diehook;
168static SV *rv_warnhook; 137static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 138static HV *hv_sig; /* %SIG */
170 139
171/* async_pool helper stuff */ 140/* async_pool helper stuff */
172static SV *sv_pool_rss; 141static SV *sv_pool_rss;
173static SV *sv_pool_size; 142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
174static AV *av_async_pool; 144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
175 147
176/* Coro::AnyEvent */ 148/* Coro::AnyEvent */
177static SV *sv_activity; 149static SV *sv_activity;
150
151/* enable processtime/realtime profiling */
152static char enable_times;
153typedef U32 coro_ts[2];
154static coro_ts time_real, time_cpu;
155static char times_valid;
178 156
179static struct coro_cctx *cctx_first; 157static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle; 158static int cctx_count, cctx_idle;
181 159
182enum { 160enum {
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 165 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 167};
190 168
191/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 170typedef struct coro_cctx
171{
193 struct coro_cctx *next; 172 struct coro_cctx *next;
194 173
195 /* the stack */ 174 /* the stack */
196 void *sptr; 175 void *sptr;
197 size_t ssize; 176 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 181 JMPENV *top_env;
203 coro_context cctx; 182 coro_context cctx;
204 183
184 U32 gen;
205#if CORO_USE_VALGRIND 185#if CORO_USE_VALGRIND
206 int valgrind_id; 186 int valgrind_id;
207#endif 187#endif
208 unsigned char flags; 188 unsigned char flags;
209} coro_cctx; 189} coro_cctx;
210 190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
211enum { 195enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */ 196 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */ 197 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */ 198 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
216}; 201};
217 202
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 203/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 204typedef struct
205{
220 SV *defsv; 206 SV *defsv;
221 AV *defav; 207 AV *defav;
222 SV *errsv; 208 SV *errsv;
223 SV *irsgv; 209 SV *irsgv;
210 HV *hinthv;
224#define VAR(name,type) type name; 211#define VAR(name,type) type name;
225# include "state.h" 212# include "state.h"
226#undef VAR 213#undef VAR
227} perl_slots; 214} perl_slots;
228 215
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 217
231/* this is a structure representing a perl-level coroutine */ 218/* this is a structure representing a perl-level coroutine */
232struct coro { 219struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 220 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 221 coro_cctx *cctx;
235 222
236 /* process data */ 223 /* ready queue */
224 struct coro *next_ready;
225
226 /* state data */
227 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 228 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 229 perl_slots *slot; /* basically the saved sp */
239 230
231 CV *startcv; /* the CV to execute */
240 AV *args; /* data associated with this coroutine (initial args) */ 232 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 233 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 234 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 235 HV *hv; /* the perl hash associated with this coro, if any */
236 void (*on_destroy)(pTHX_ struct coro *coro);
244 237
245 /* statistics */ 238 /* statistics */
246 int usecount; /* number of transfers to this coro */ 239 int usecount; /* number of transfers to this coro */
247 240
248 /* coro process data */ 241 /* coro process data */
249 int prio; 242 int prio;
250 SV *throw; /* exception to be thrown */ 243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
251 245
252 /* async_pool */ 246 /* async_pool */
253 SV *saved_deffh; 247 SV *saved_deffh;
248 SV *invoke_cb;
249 AV *invoke_av;
250
251 /* on_enter/on_leave */
252 AV *on_enter;
253 AV *on_leave;
254
255 /* times */
256 coro_ts t_cpu, t_real;
254 257
255 /* linked list */ 258 /* linked list */
256 struct coro *next, *prev; 259 struct coro *next, *prev;
257}; 260};
258 261
259typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
261 264
265/* the following variables are effectively part of the perl context */
266/* and get copied between struct coro and these variables */
267/* the mainr easonw e don't support windows process emulation */
268static struct CoroSLF slf_frame; /* the current slf frame */
269
262/** Coro ********************************************************************/ 270/** Coro ********************************************************************/
263 271
264#define PRIO_MAX 3 272#define CORO_PRIO_MAX 3
265#define PRIO_HIGH 1 273#define CORO_PRIO_HIGH 1
266#define PRIO_NORMAL 0 274#define CORO_PRIO_NORMAL 0
267#define PRIO_LOW -1 275#define CORO_PRIO_LOW -1
268#define PRIO_IDLE -3 276#define CORO_PRIO_IDLE -3
269#define PRIO_MIN -4 277#define CORO_PRIO_MIN -4
270 278
271/* for Coro.pm */ 279/* for Coro.pm */
272static SV *coro_current; 280static SV *coro_current;
273static SV *coro_readyhook; 281static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
275static int coro_nready; 283static CV *cv_coro_run, *cv_coro_terminate;
276static struct coro *coro_first; 284static struct coro *coro_first;
285#define coro_nready coroapi.nready
286
287/** Coro::Select ************************************************************/
288
289static OP *(*coro_old_pp_sselect) (pTHX);
290static SV *coro_select_select;
291
292/* horrible hack, but if it works... */
293static OP *
294coro_pp_sselect (pTHX)
295{
296 dSP;
297 PUSHMARK (SP - 4); /* fake argument list */
298 XPUSHs (coro_select_select);
299 PUTBACK;
300
301 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
302 PL_op->op_flags |= OPf_STACKED;
303 PL_op->op_private = 0;
304 return PL_ppaddr [OP_ENTERSUB](aTHX);
305}
277 306
278/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
279 308
280static SV * 309static SV *
281coro_get_sv (pTHX_ const char *name, int create) 310coro_get_sv (pTHX_ const char *name, int create)
… …
305 get_hv (name, create); 334 get_hv (name, create);
306#endif 335#endif
307 return get_hv (name, create); 336 return get_hv (name, create);
308} 337}
309 338
339INLINE void
340coro_times_update ()
341{
342#ifdef coro_clock_gettime
343 struct timespec ts;
344
345 ts.tv_sec = ts.tv_nsec = 0;
346 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
347 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
348
349 ts.tv_sec = ts.tv_nsec = 0;
350 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
351 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
352#else
353 dTHX;
354 UV tv[2];
355
356 u2time (aTHX_ tv);
357 time_real [0] = tv [0];
358 time_real [1] = tv [1] * 1000;
359#endif
360}
361
362INLINE void
363coro_times_add (struct coro *c)
364{
365 c->t_real [1] += time_real [1];
366 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
367 c->t_real [0] += time_real [0];
368
369 c->t_cpu [1] += time_cpu [1];
370 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
371 c->t_cpu [0] += time_cpu [0];
372}
373
374INLINE void
375coro_times_sub (struct coro *c)
376{
377 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
378 c->t_real [1] -= time_real [1];
379 c->t_real [0] -= time_real [0];
380
381 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
382 c->t_cpu [1] -= time_cpu [1];
383 c->t_cpu [0] -= time_cpu [0];
384}
385
386/*****************************************************************************/
387/* magic glue */
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392#define CORO_MAGIC_NN(sv, type) \
393 (expect_true (SvMAGIC (sv)->mg_type == type) \
394 ? SvMAGIC (sv) \
395 : mg_find (sv, type))
396
397#define CORO_MAGIC(sv, type) \
398 (expect_true (SvMAGIC (sv)) \
399 ? CORO_MAGIC_NN (sv, type) \
400 : 0)
401
402#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
403#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
404
405INLINE struct coro *
406SvSTATE_ (pTHX_ SV *coro)
407{
408 HV *stash;
409 MAGIC *mg;
410
411 if (SvROK (coro))
412 coro = SvRV (coro);
413
414 if (expect_false (SvTYPE (coro) != SVt_PVHV))
415 croak ("Coro::State object required");
416
417 stash = SvSTASH (coro);
418 if (expect_false (stash != coro_stash && stash != coro_state_stash))
419 {
420 /* very slow, but rare, check */
421 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
422 croak ("Coro::State object required");
423 }
424
425 mg = CORO_MAGIC_state (coro);
426 return (struct coro *)mg->mg_ptr;
427}
428
429#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
430
431/* faster than SvSTATE, but expects a coroutine hv */
432#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
433#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
434
435/*****************************************************************************/
436/* padlist management and caching */
437
310static AV * 438static AV *
311coro_clone_padlist (pTHX_ CV *cv) 439coro_derive_padlist (pTHX_ CV *cv)
312{ 440{
313 AV *padlist = CvPADLIST (cv); 441 AV *padlist = CvPADLIST (cv);
314 AV *newpadlist, *newpad; 442 AV *newpadlist, *newpad;
315 443
316 newpadlist = newAV (); 444 newpadlist = newAV ();
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 450#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 452 --AvFILLp (padlist);
325 453
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
327 av_store (newpadlist, 1, (SV *)newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
328 456
329 return newpadlist; 457 return newpadlist;
330} 458}
331 459
332static void 460static void
333free_padlist (pTHX_ AV *padlist) 461free_padlist (pTHX_ AV *padlist)
334{ 462{
335 /* may be during global destruction */ 463 /* may be during global destruction */
336 if (SvREFCNT (padlist)) 464 if (!IN_DESTRUCT)
337 { 465 {
338 I32 i = AvFILLp (padlist); 466 I32 i = AvFILLp (padlist);
339 while (i >= 0) 467
468 while (i > 0) /* special-case index 0 */
340 { 469 {
341 SV **svp = av_fetch (padlist, i--, FALSE); 470 /* we try to be extra-careful here */
342 if (svp) 471 AV *av = (AV *)AvARRAY (padlist)[i--];
343 { 472 I32 j = AvFILLp (av);
344 SV *sv; 473
345 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 474 while (j >= 0)
475 SvREFCNT_dec (AvARRAY (av)[j--]);
476
477 AvFILLp (av) = -1;
346 SvREFCNT_dec (sv); 478 SvREFCNT_dec (av);
347
348 SvREFCNT_dec (*svp);
349 }
350 } 479 }
351 480
481 SvREFCNT_dec (AvARRAY (padlist)[0]);
482
483 AvFILLp (padlist) = -1;
352 SvREFCNT_dec ((SV*)padlist); 484 SvREFCNT_dec ((SV*)padlist);
353 } 485 }
354} 486}
355 487
356static int 488static int
357coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
358{ 490{
359 AV *padlist; 491 AV *padlist;
360 AV *av = (AV *)mg->mg_obj; 492 AV *av = (AV *)mg->mg_obj;
493
494 /* perl manages to free our internal AV and _then_ call us */
495 if (IN_DESTRUCT)
496 return 0;
361 497
362 /* casting is fun. */ 498 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 500 free_padlist (aTHX_ padlist);
365 501
502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
503
366 return 0; 504 return 0;
367} 505}
368
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 506
372static MGVTBL coro_cv_vtbl = { 507static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 508 0, 0, 0, 0,
374 coro_cv_free 509 coro_cv_free
375}; 510};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
412 511
413/* the next two functions merely cache the padlists */ 512/* the next two functions merely cache the padlists */
414static void 513static void
415get_padlist (pTHX_ CV *cv) 514get_padlist (pTHX_ CV *cv)
416{ 515{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 519 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 520 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 521 else
423 { 522 {
424#if CORO_PREFER_PERL_FUNCTIONS 523#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 524 /* this is probably cleaner? but also slower! */
525 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 526 CV *cp = Perl_cv_clone (aTHX_ cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 527 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 528 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 529 SvREFCNT_dec (cp);
430#else 530#else
431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
432#endif 532#endif
433 } 533 }
434} 534}
435 535
436static void 536static void
… …
443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
444 544
445 av = (AV *)mg->mg_obj; 545 av = (AV *)mg->mg_obj;
446 546
447 if (expect_false (AvFILLp (av) >= AvMAX (av))) 547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
448 av_extend (av, AvMAX (av) + 1); 548 av_extend (av, AvFILLp (av) + 1);
449 549
450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
451} 551}
452 552
453/** load & save, init *******************************************************/ 553/** load & save, init *******************************************************/
554
555static void
556on_enterleave_call (pTHX_ SV *cb);
454 557
455static void 558static void
456load_perl (pTHX_ Coro__State c) 559load_perl (pTHX_ Coro__State c)
457{ 560{
458 perl_slots *slot = c->slot; 561 perl_slots *slot = c->slot;
459 c->slot = 0; 562 c->slot = 0;
460 563
461 PL_mainstack = c->mainstack; 564 PL_mainstack = c->mainstack;
462 565
463 GvSV (PL_defgv) = slot->defsv; 566 GvSV (PL_defgv) = slot->defsv;
464 GvAV (PL_defgv) = slot->defav; 567 GvAV (PL_defgv) = slot->defav;
465 GvSV (PL_errgv) = slot->errsv; 568 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv; 569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
467 571
468 #define VAR(name,type) PL_ ## name = slot->name; 572 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h" 573 # include "state.h"
470 #undef VAR 574 #undef VAR
471 575
… …
482 CvPADLIST (cv) = (AV *)POPs; 586 CvPADLIST (cv) = (AV *)POPs;
483 } 587 }
484 588
485 PUTBACK; 589 PUTBACK;
486 } 590 }
591
592 slf_frame = c->slf_frame;
593 CORO_THROW = c->except;
594
595 if (expect_false (enable_times))
596 {
597 if (expect_false (!times_valid))
598 coro_times_update ();
599
600 coro_times_sub (c);
601 }
602
603 if (expect_false (c->on_enter))
604 {
605 int i;
606
607 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
608 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
609 }
487} 610}
488 611
489static void 612static void
490save_perl (pTHX_ Coro__State c) 613save_perl (pTHX_ Coro__State c)
491{ 614{
615 if (expect_false (c->on_leave))
616 {
617 int i;
618
619 for (i = AvFILLp (c->on_leave); i >= 0; --i)
620 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
621 }
622
623 times_valid = 0;
624
625 if (expect_false (enable_times))
626 {
627 coro_times_update (); times_valid = 1;
628 coro_times_add (c);
629 }
630
631 c->except = CORO_THROW;
632 c->slf_frame = slf_frame;
633
492 { 634 {
493 dSP; 635 dSP;
494 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
506 { 648 {
507 while (expect_true (cxix >= 0)) 649 while (expect_true (cxix >= 0))
508 { 650 {
509 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
510 652
511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 653 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
512 { 654 {
513 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
514 656
515 if (expect_true (CvDEPTH (cv))) 657 if (expect_true (CvDEPTH (cv)))
516 { 658 {
… …
540 /* we manually unroll here, as usually 2 slots is enough */ 682 /* we manually unroll here, as usually 2 slots is enough */
541 if (SLOT_COUNT >= 1) CXINC; 683 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC; 684 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC; 685 if (SLOT_COUNT >= 3) CXINC;
544 { 686 {
545 int i; 687 unsigned int i;
546 for (i = 3; i < SLOT_COUNT; ++i) 688 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC; 689 CXINC;
548 } 690 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
550 692
551 c->mainstack = PL_mainstack; 693 c->mainstack = PL_mainstack;
552 694
553 { 695 {
554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
555 697
556 slot->defav = GvAV (PL_defgv); 698 slot->defav = GvAV (PL_defgv);
557 slot->defsv = DEFSV; 699 slot->defsv = DEFSV;
558 slot->errsv = ERRSV; 700 slot->errsv = ERRSV;
559 slot->irsgv = GvSV (irsgv); 701 slot->irsgv = GvSV (irsgv);
702 slot->hinthv = GvHV (PL_hintgv);
560 703
561 #define VAR(name,type) slot->name = PL_ ## name; 704 #define VAR(name,type) slot->name = PL_ ## name;
562 # include "state.h" 705 # include "state.h"
563 #undef VAR 706 #undef VAR
564 } 707 }
565} 708}
566 709
567/* 710/*
568 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 713 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 714 * not usually need a lot of stackspace.
572 */ 715 */
573#if CORO_PREFER_PERL_FUNCTIONS 716#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks 717# define coro_init_stacks(thx) init_stacks ()
575#else 718#else
576static void 719static void
577coro_init_stacks (pTHX) 720coro_init_stacks (pTHX)
578{ 721{
579 PL_curstackinfo = new_stackinfo(32, 8); 722 PL_curstackinfo = new_stackinfo(32, 8);
… …
616 759
617/* 760/*
618 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
619 */ 762 */
620static void 763static void
621coro_destroy_stacks (pTHX) 764coro_destruct_stacks (pTHX)
622{ 765{
623 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
625 768
626 while (PL_curstackinfo) 769 while (PL_curstackinfo)
… …
642#if !PERL_VERSION_ATLEAST (5,10,0) 785#if !PERL_VERSION_ATLEAST (5,10,0)
643 Safefree (PL_retstack); 786 Safefree (PL_retstack);
644#endif 787#endif
645} 788}
646 789
790#define CORO_RSS \
791 rss += sizeof (SYM (curstackinfo)); \
792 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
793 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
794 rss += SYM (tmps_max) * sizeof (SV *); \
795 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
796 rss += SYM (scopestack_max) * sizeof (I32); \
797 rss += SYM (savestack_max) * sizeof (ANY);
798
647static size_t 799static size_t
648coro_rss (pTHX_ struct coro *coro) 800coro_rss (pTHX_ struct coro *coro)
649{ 801{
650 size_t rss = sizeof (*coro); 802 size_t rss = sizeof (*coro);
651 803
652 if (coro->mainstack) 804 if (coro->mainstack)
653 { 805 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING) 806 if (coro->flags & CF_RUNNING)
658 { 807 {
659 slot = &tmp_slot; 808 #define SYM(sym) PL_ ## sym
660 809 CORO_RSS;
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR 810 #undef SYM
664 } 811 }
665 else 812 else
666 slot = coro->slot; 813 {
667 814 #define SYM(sym) coro->slot->sym
668 rss += sizeof (slot->curstackinfo); 815 CORO_RSS;
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 816 #undef SYM
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 817 }
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 } 818 }
680 819
681 return rss; 820 return rss;
682} 821}
683 822
… …
695#endif 834#endif
696 835
697/* 836/*
698 * This overrides the default magic get method of %SIG elements. 837 * This overrides the default magic get method of %SIG elements.
699 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
700 * and instead of tryign to save and restore the hash elements, we just provide 839 * and instead of trying to save and restore the hash elements, we just provide
701 * readback here. 840 * readback here.
702 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
703 * not expecting this to actually change the hook. This is a potential problem
704 * when a schedule happens then, but we ignore this.
705 */ 841 */
706static int 842static int
707coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
708{ 844{
709 const char *s = MgPV_nolen_const (mg); 845 const char *s = MgPV_nolen_const (mg);
… …
762 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
763 899
764 if (svp) 900 if (svp)
765 { 901 {
766 SV *old = *svp; 902 SV *old = *svp;
767 *svp = newSVsv (sv); 903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
768 SvREFCNT_dec (old); 904 SvREFCNT_dec (old);
769 return 0; 905 return 0;
770 } 906 }
771 } 907 }
772 908
773 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
774} 910}
775 911
776static void 912static void
913prepare_nop (pTHX_ struct coro_transfer_args *ta)
914{
915 /* kind of mega-hacky, but works */
916 ta->next = ta->prev = (struct coro *)ta;
917}
918
919static int
920slf_check_nop (pTHX_ struct CoroSLF *frame)
921{
922 return 0;
923}
924
925static int
926slf_check_repeat (pTHX_ struct CoroSLF *frame)
927{
928 return 1;
929}
930
931static UNOP coro_setup_op;
932
933static void NOINLINE /* noinline to keep it out of the transfer fast path */
777coro_setup (pTHX_ struct coro *coro) 934coro_setup (pTHX_ struct coro *coro)
778{ 935{
779 /* 936 /*
780 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
781 */ 938 */
… …
783 940
784 PL_runops = RUNOPS_DEFAULT; 941 PL_runops = RUNOPS_DEFAULT;
785 PL_curcop = &PL_compiling; 942 PL_curcop = &PL_compiling;
786 PL_in_eval = EVAL_NULL; 943 PL_in_eval = EVAL_NULL;
787 PL_comppad = 0; 944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
788 PL_curpm = 0; 948 PL_curpm = 0;
789 PL_curpad = 0; 949 PL_curpad = 0;
790 PL_localizing = 0; 950 PL_localizing = 0;
791 PL_dirty = 0; 951 PL_dirty = 0;
792 PL_restartop = 0; 952 PL_restartop = 0;
793#if PERL_VERSION_ATLEAST (5,10,0) 953#if PERL_VERSION_ATLEAST (5,10,0)
794 PL_parser = 0; 954 PL_parser = 0;
795#endif 955#endif
956 PL_hints = 0;
796 957
797 /* recreate the die/warn hooks */ 958 /* recreate the die/warn hooks */
798 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
799 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
800 961
801 GvSV (PL_defgv) = newSV (0); 962 GvSV (PL_defgv) = newSV (0);
802 GvAV (PL_defgv) = coro->args; coro->args = 0; 963 GvAV (PL_defgv) = coro->args; coro->args = 0;
803 GvSV (PL_errgv) = newSV (0); 964 GvSV (PL_errgv) = newSV (0);
804 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 965 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
966 GvHV (PL_hintgv) = 0;
805 PL_rs = newSVsv (GvSV (irsgv)); 967 PL_rs = newSVsv (GvSV (irsgv));
806 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
807 969
808 { 970 {
809 dSP; 971 dSP;
810 LOGOP myop; 972 UNOP myop;
811 973
812 Zero (&myop, 1, LOGOP); 974 Zero (&myop, 1, UNOP);
813 myop.op_next = Nullop; 975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
814 myop.op_flags = OPf_WANT_VOID; 977 myop.op_flags = OPf_WANT_VOID;
815 978
816 PUSHMARK (SP); 979 PUSHMARK (SP);
817 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 980 PUSHs ((SV *)coro->startcv);
818 PUTBACK; 981 PUTBACK;
819 PL_op = (OP *)&myop; 982 PL_op = (OP *)&myop;
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
821 SPAGAIN;
822 } 984 }
823 985
824 /* this newly created coroutine might be run on an existing cctx which most 986 /* this newly created coroutine might be run on an existing cctx which most
825 * likely was suspended in set_stacklevel, called from entersub. 987 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
826 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
827 * so we ENTER here for symmetry
828 */ 988 */
829 ENTER; 989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
830} 990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
831 991
992 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
993 coro_setup_op.op_next = PL_op;
994 coro_setup_op.op_type = OP_ENTERSUB;
995 coro_setup_op.op_ppaddr = pp_slf;
996 /* no flags etc. required, as an init function won't be called */
997
998 PL_op = (OP *)&coro_setup_op;
999
1000 /* copy throw, in case it was set before coro_setup */
1001 CORO_THROW = coro->except;
1002
1003 if (expect_false (enable_times))
1004 {
1005 coro_times_update ();
1006 coro_times_sub (coro);
1007 }
1008}
1009
832static void 1010static void
833coro_destroy (pTHX_ struct coro *coro) 1011coro_unwind_stacks (pTHX)
834{ 1012{
835 if (!IN_DESTRUCT) 1013 if (!IN_DESTRUCT)
836 { 1014 {
837 /* restore all saved variables and stuff */ 1015 /* restore all saved variables and stuff */
838 LEAVE_SCOPE (0); 1016 LEAVE_SCOPE (0);
… …
846 POPSTACK_TO (PL_mainstack); 1024 POPSTACK_TO (PL_mainstack);
847 1025
848 /* unwind main stack */ 1026 /* unwind main stack */
849 dounwind (-1); 1027 dounwind (-1);
850 } 1028 }
1029}
851 1030
852 SvREFCNT_dec (GvSV (PL_defgv)); 1031static void
853 SvREFCNT_dec (GvAV (PL_defgv)); 1032coro_destruct_perl (pTHX_ struct coro *coro)
854 SvREFCNT_dec (GvSV (PL_errgv)); 1033{
855 SvREFCNT_dec (PL_defoutgv); 1034 SV *svf [9];
856 SvREFCNT_dec (PL_rs);
857 SvREFCNT_dec (GvSV (irsgv));
858 1035
859 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook);
861 1036 {
1037 struct coro *current = SvSTATE_current;
1038
1039 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1040
1041 save_perl (aTHX_ current);
1042 load_perl (aTHX_ coro);
1043
1044 coro_unwind_stacks (aTHX);
1045 coro_destruct_stacks (aTHX);
1046
1047 // now save some sv's to be free'd later
1048 svf [0] = GvSV (PL_defgv);
1049 svf [1] = (SV *)GvAV (PL_defgv);
1050 svf [2] = GvSV (PL_errgv);
1051 svf [3] = (SV *)PL_defoutgv;
1052 svf [4] = PL_rs;
1053 svf [5] = GvSV (irsgv);
1054 svf [6] = (SV *)GvHV (PL_hintgv);
1055 svf [7] = PL_diehook;
1056 svf [8] = PL_warnhook;
1057 assert (9 == sizeof (svf) / sizeof (*svf));
1058
1059 load_perl (aTHX_ current);
1060 }
1061
1062 {
1063 unsigned int i;
1064
1065 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1066 SvREFCNT_dec (svf [i]);
1067
862 SvREFCNT_dec (coro->saved_deffh); 1068 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw); 1069 SvREFCNT_dec (coro->rouse_cb);
864 1070 SvREFCNT_dec (coro->invoke_cb);
865 coro_destroy_stacks (aTHX); 1071 SvREFCNT_dec (coro->invoke_av);
1072 }
866} 1073}
867 1074
868static void 1075INLINE void
869free_coro_mortal (pTHX) 1076free_coro_mortal (pTHX)
870{ 1077{
871 if (expect_true (coro_mortal)) 1078 if (expect_true (coro_mortal))
872 { 1079 {
873 SvREFCNT_dec (coro_mortal); 1080 SvREFCNT_dec (coro_mortal);
… …
878static int 1085static int
879runops_trace (pTHX) 1086runops_trace (pTHX)
880{ 1087{
881 COP *oldcop = 0; 1088 COP *oldcop = 0;
882 int oldcxix = -2; 1089 int oldcxix = -2;
883 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
884 coro_cctx *cctx = coro->cctx;
885 1090
886 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
887 { 1092 {
888 PERL_ASYNC_CHECK (); 1093 PERL_ASYNC_CHECK ();
889 1094
890 if (cctx->flags & CC_TRACE_ALL) 1095 if (cctx_current->flags & CC_TRACE_ALL)
891 { 1096 {
892 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1097 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
893 { 1098 {
894 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
895 SV **bot, **top; 1100 SV **bot, **top;
896 AV *av = newAV (); /* return values */ 1101 AV *av = newAV (); /* return values */
897 SV **cb; 1102 SV **cb;
… …
907 : cx->blk_gimme == G_SCALAR ? bot + 1 1112 : cx->blk_gimme == G_SCALAR ? bot + 1
908 : bot; 1113 : bot;
909 1114
910 av_extend (av, top - bot); 1115 av_extend (av, top - bot);
911 while (bot < top) 1116 while (bot < top)
912 av_push (av, SvREFCNT_inc (*bot++)); 1117 av_push (av, SvREFCNT_inc_NN (*bot++));
913 1118
914 PL_runops = RUNOPS_DEFAULT; 1119 PL_runops = RUNOPS_DEFAULT;
915 ENTER; 1120 ENTER;
916 SAVETMPS; 1121 SAVETMPS;
917 EXTEND (SP, 3); 1122 EXTEND (SP, 3);
… …
934 1139
935 if (PL_curcop != &PL_compiling) 1140 if (PL_curcop != &PL_compiling)
936 { 1141 {
937 SV **cb; 1142 SV **cb;
938 1143
939 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
940 { 1145 {
941 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
942 1147
943 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
944 { 1149 {
945 runops_proc_t old_runops = PL_runops;
946 dSP; 1150 dSP;
947 GV *gv = CvGV (cx->blk_sub.cv); 1151 GV *gv = CvGV (cx->blk_sub.cv);
948 SV *fullname = sv_2mortal (newSV (0)); 1152 SV *fullname = sv_2mortal (newSV (0));
949 1153
950 if (isGV (gv)) 1154 if (isGV (gv))
… …
955 SAVETMPS; 1159 SAVETMPS;
956 EXTEND (SP, 3); 1160 EXTEND (SP, 3);
957 PUSHMARK (SP); 1161 PUSHMARK (SP);
958 PUSHs (&PL_sv_yes); 1162 PUSHs (&PL_sv_yes);
959 PUSHs (fullname); 1163 PUSHs (fullname);
960 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1164 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
961 PUTBACK; 1165 PUTBACK;
962 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1166 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
963 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1167 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
964 SPAGAIN; 1168 SPAGAIN;
965 FREETMPS; 1169 FREETMPS;
… …
968 } 1172 }
969 1173
970 oldcxix = cxstack_ix; 1174 oldcxix = cxstack_ix;
971 } 1175 }
972 1176
973 if (cctx->flags & CC_TRACE_LINE) 1177 if (cctx_current->flags & CC_TRACE_LINE)
974 { 1178 {
975 dSP; 1179 dSP;
976 1180
977 PL_runops = RUNOPS_DEFAULT; 1181 PL_runops = RUNOPS_DEFAULT;
978 ENTER; 1182 ENTER;
… …
997 1201
998 TAINT_NOT; 1202 TAINT_NOT;
999 return 0; 1203 return 0;
1000} 1204}
1001 1205
1002/* inject a fake call to Coro::State::_cctx_init into the execution */ 1206static struct CoroSLF cctx_ssl_frame;
1003/* _cctx_init should be careful, as it could be called at almost any time */ 1207
1004/* during execution of a perl program */ 1208static void
1209slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1210{
1211 ta->prev = 0;
1212}
1213
1214static int
1215slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1216{
1217 *frame = cctx_ssl_frame;
1218
1219 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1220}
1221
1222/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1005static void NOINLINE 1223static void NOINLINE
1006cctx_prepare (pTHX_ coro_cctx *cctx) 1224cctx_prepare (pTHX)
1007{ 1225{
1008 dSP;
1009 LOGOP myop;
1010
1011 PL_top_env = &PL_start_env; 1226 PL_top_env = &PL_start_env;
1012 1227
1013 if (cctx->flags & CC_TRACE) 1228 if (cctx_current->flags & CC_TRACE)
1014 PL_runops = runops_trace; 1229 PL_runops = runops_trace;
1015 1230
1016 Zero (&myop, 1, LOGOP); 1231 /* we already must be executing an SLF op, there is no other valid way
1017 myop.op_next = PL_op; 1232 * that can lead to creation of a new cctx */
1018 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1233 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1234 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1019 1235
1020 PUSHMARK (SP); 1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1021 EXTEND (SP, 2); 1237 cctx_ssl_frame = slf_frame;
1022 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1238
1023 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1239 slf_frame.prepare = slf_prepare_set_stacklevel;
1024 PUTBACK; 1240 slf_frame.check = slf_check_set_stacklevel;
1025 PL_op = (OP *)&myop; 1241}
1026 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1242
1027 SPAGAIN; 1243/* the tail of transfer: execute stuff we can only do after a transfer */
1244INLINE void
1245transfer_tail (pTHX)
1246{
1247 free_coro_mortal (aTHX);
1028} 1248}
1029 1249
1030/* 1250/*
1031 * this is a _very_ stripped down perl interpreter ;) 1251 * this is a _very_ stripped down perl interpreter ;)
1032 */ 1252 */
1033static void 1253static void
1034cctx_run (void *arg) 1254cctx_run (void *arg)
1035{ 1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
1036 dTHX; 1262 dTHX;
1037 1263
1038 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1264 /* normally we would need to skip the entersub here */
1039 UNLOCK; 1265 /* not doing so will re-execute it, which is exactly what we want */
1040
1041 /* we now skip the entersub that lead to transfer() */
1042 PL_op = PL_op->op_next; 1266 /* PL_nop = PL_nop->op_next */
1043 1267
1044 /* inject a fake subroutine call to cctx_init */ 1268 /* inject a fake subroutine call to cctx_init */
1045 cctx_prepare (aTHX_ (coro_cctx *)arg); 1269 cctx_prepare (aTHX);
1046 1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
1047 /* somebody or something will hit me for both perl_run and PL_restartop */ 1274 /* somebody or something will hit me for both perl_run and PL_restartop */
1048 PL_restartop = PL_op; 1275 PL_restartop = PL_op;
1049 perl_run (PL_curinterp); 1276 perl_run (PL_curinterp);
1050
1051 /* 1277 /*
1278 * Unfortunately, there is no way to get at the return values of the
1279 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1280 * runtime errors here, as this is just a random interpreter, not a thread.
1281 */
1282
1283 /*
1052 * If perl-run returns we assume exit() was being called or the coro 1284 * If perl-run returns we assume exit() was being called or the coro
1053 * fell off the end, which seems to be the only valid (non-bug) 1285 * fell off the end, which seems to be the only valid (non-bug)
1054 * reason for perl_run to return. We try to exit by jumping to the 1286 * reason for perl_run to return. We try to exit by jumping to the
1055 * bootstrap-time "top" top_env, as we cannot restore the "main" 1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1056 * coroutine as Coro has no such concept 1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1057 */ 1291 */
1058 PL_top_env = main_top_env; 1292 PL_top_env = main_top_env;
1059 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
1060} 1295}
1061 1296
1062static coro_cctx * 1297static coro_cctx *
1063cctx_new () 1298cctx_new ()
1064{ 1299{
1065 coro_cctx *cctx; 1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1066 void *stack_start; 1329 void *stack_start;
1067 size_t stack_size; 1330 size_t stack_size;
1068 1331
1069 ++cctx_count;
1070
1071 Newz (0, cctx, 1, coro_cctx);
1072
1073#if HAVE_MMAP 1332#if HAVE_MMAP
1074 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1075 /* mmap supposedly does allocate-on-write for us */ 1334 /* mmap supposedly does allocate-on-write for us */
1076 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1077 1336
1078 if (cctx->sptr != (void *)-1) 1337 if (cctx->sptr != (void *)-1)
1079 { 1338 {
1080# if CORO_STACKGUARD 1339 #if CORO_STACKGUARD
1081 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1082# endif 1341 #endif
1083 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1084 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1085 cctx->flags |= CC_MAPPED; 1344 cctx->flags |= CC_MAPPED;
1086 } 1345 }
1087 else 1346 else
1088#endif 1347#endif
1089 { 1348 {
1090 cctx->ssize = coro_stacksize * (long)sizeof (long); 1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1091 New (0, cctx->sptr, coro_stacksize, long); 1350 New (0, cctx->sptr, cctx_stacksize, long);
1092 1351
1093 if (!cctx->sptr) 1352 if (!cctx->sptr)
1094 { 1353 {
1095 perror ("FATAL: unable to allocate stack for coroutine"); 1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1096 _exit (EXIT_FAILURE); 1355 _exit (EXIT_FAILURE);
1097 } 1356 }
1098 1357
1099 stack_start = cctx->sptr; 1358 stack_start = cctx->sptr;
1100 stack_size = cctx->ssize; 1359 stack_size = cctx->ssize;
1101 } 1360 }
1102 1361
1103 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1104 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1105 1367
1106 return cctx; 1368 return cctx;
1107} 1369}
1108 1370
… …
1110cctx_destroy (coro_cctx *cctx) 1372cctx_destroy (coro_cctx *cctx)
1111{ 1373{
1112 if (!cctx) 1374 if (!cctx)
1113 return; 1375 return;
1114 1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1115 --cctx_count; 1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1116 1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1117#if CORO_USE_VALGRIND 1385 #if CORO_USE_VALGRIND
1118 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
1119#endif 1393#endif
1120
1121#if HAVE_MMAP
1122 if (cctx->flags & CC_MAPPED)
1123 munmap (cctx->sptr, cctx->ssize);
1124 else
1125#endif
1126 Safefree (cctx->sptr); 1394 Safefree (cctx->sptr);
1395 }
1127 1396
1128 Safefree (cctx); 1397 Safefree (cctx);
1129} 1398}
1130 1399
1131/* wether this cctx should be destructed */ 1400/* wether this cctx should be destructed */
1132#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1133 1402
1134static coro_cctx * 1403static coro_cctx *
1135cctx_get (pTHX) 1404cctx_get (pTHX)
1136{ 1405{
1137 while (expect_true (cctx_first)) 1406 while (expect_true (cctx_first))
… …
1144 return cctx; 1413 return cctx;
1145 1414
1146 cctx_destroy (cctx); 1415 cctx_destroy (cctx);
1147 } 1416 }
1148 1417
1149 return cctx_new (); 1418 return cctx_new_run ();
1150} 1419}
1151 1420
1152static void 1421static void
1153cctx_put (coro_cctx *cctx) 1422cctx_put (coro_cctx *cctx)
1154{ 1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1155 /* free another cctx if overlimit */ 1426 /* free another cctx if overlimit */
1156 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1427 if (expect_false (cctx_idle >= cctx_max_idle))
1157 { 1428 {
1158 coro_cctx *first = cctx_first; 1429 coro_cctx *first = cctx_first;
1159 cctx_first = first->next; 1430 cctx_first = first->next;
1160 --cctx_idle; 1431 --cctx_idle;
1161 1432
… …
1170/** coroutine switching *****************************************************/ 1441/** coroutine switching *****************************************************/
1171 1442
1172static void 1443static void
1173transfer_check (pTHX_ struct coro *prev, struct coro *next) 1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1174{ 1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1175 if (expect_true (prev != next)) 1448 if (expect_true (prev != next))
1176 { 1449 {
1177 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1178 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1179 1452
1180 if (expect_false (next->flags & CF_RUNNING))
1181 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1182
1183 if (expect_false (next->flags & CF_DESTROYED)) 1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1184 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1185 1455
1186#if !PERL_VERSION_ATLEAST (5,10,0) 1456#if !PERL_VERSION_ATLEAST (5,10,0)
1187 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1188 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1189#endif 1459#endif
1190 } 1460 }
1191} 1461}
1192 1462
1193/* always use the TRANSFER macro */ 1463/* always use the TRANSFER macro */
1194static void NOINLINE 1464static void NOINLINE /* noinline so we have a fixed stackframe */
1195transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1196{ 1466{
1197 dSTACKLEVEL; 1467 dSTACKLEVEL;
1198 static volatile int has_throw;
1199 1468
1200 /* sometimes transfer is only called to set idle_sp */ 1469 /* sometimes transfer is only called to set idle_sp */
1201 if (expect_false (!next)) 1470 if (expect_false (!prev))
1202 { 1471 {
1203 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1472 cctx_current->idle_sp = STACKLEVEL;
1204 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1205 } 1474 }
1206 else if (expect_true (prev != next)) 1475 else if (expect_true (prev != next))
1207 { 1476 {
1208 coro_cctx *prev__cctx; 1477 coro_cctx *cctx_prev;
1209 1478
1210 if (expect_false (prev->flags & CF_NEW)) 1479 if (expect_false (prev->flags & CF_NEW))
1211 { 1480 {
1212 /* create a new empty context */ 1481 /* create a new empty/source context */
1213 Newz (0, prev->cctx, 1, coro_cctx);
1214 prev->flags &= ~CF_NEW; 1482 prev->flags &= ~CF_NEW;
1215 prev->flags |= CF_RUNNING; 1483 prev->flags |= CF_RUNNING;
1216 } 1484 }
1217 1485
1218 prev->flags &= ~CF_RUNNING; 1486 prev->flags &= ~CF_RUNNING;
1219 next->flags |= CF_RUNNING; 1487 next->flags |= CF_RUNNING;
1220
1221 LOCK;
1222 1488
1223 /* first get rid of the old state */ 1489 /* first get rid of the old state */
1224 save_perl (aTHX_ prev); 1490 save_perl (aTHX_ prev);
1225 1491
1226 if (expect_false (next->flags & CF_NEW)) 1492 if (expect_false (next->flags & CF_NEW))
… …
1231 coro_setup (aTHX_ next); 1497 coro_setup (aTHX_ next);
1232 } 1498 }
1233 else 1499 else
1234 load_perl (aTHX_ next); 1500 load_perl (aTHX_ next);
1235 1501
1236 prev__cctx = prev->cctx;
1237
1238 /* possibly "free" the cctx */ 1502 /* possibly untie and reuse the cctx */
1239 if (expect_true ( 1503 if (expect_true (
1240 prev__cctx->idle_sp == STACKLEVEL 1504 cctx_current->idle_sp == STACKLEVEL
1241 && !(prev__cctx->flags & CC_TRACE) 1505 && !(cctx_current->flags & CC_TRACE)
1242 && !force_cctx 1506 && !force_cctx
1243 )) 1507 ))
1244 { 1508 {
1245 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1246 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1247 1511
1248 prev->cctx = 0;
1249
1250 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1251 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1252 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1253 if (!next->cctx) 1515 if (expect_true (!next->cctx))
1254 next->cctx = cctx_get (aTHX); 1516 next->cctx = cctx_get (aTHX);
1255 1517
1256 cctx_put (prev__cctx); 1518 cctx_put (cctx_current);
1257 } 1519 }
1520 else
1521 prev->cctx = cctx_current;
1258 1522
1259 ++next->usecount; 1523 ++next->usecount;
1260 1524
1261 if (expect_true (!next->cctx)) 1525 cctx_prev = cctx_current;
1262 next->cctx = cctx_get (aTHX); 1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1263 1527
1264 has_throw = !!next->throw; 1528 next->cctx = 0;
1265 1529
1266 if (expect_false (prev__cctx != next->cctx)) 1530 if (expect_false (cctx_prev != cctx_current))
1267 { 1531 {
1268 prev__cctx->top_env = PL_top_env; 1532 cctx_prev->top_env = PL_top_env;
1269 PL_top_env = next->cctx->top_env; 1533 PL_top_env = cctx_current->top_env;
1270 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1271 } 1535 }
1272 1536
1273 free_coro_mortal (aTHX); 1537 transfer_tail (aTHX);
1274 UNLOCK;
1275
1276 if (expect_false (has_throw))
1277 {
1278 struct coro *coro = SvSTATE (coro_current);
1279
1280 if (coro->throw)
1281 {
1282 SV *exception = coro->throw;
1283 coro->throw = 0;
1284 sv_setsv (ERRSV, exception);
1285 croak (0);
1286 }
1287 }
1288 } 1538 }
1289} 1539}
1290
1291struct transfer_args
1292{
1293 struct coro *prev, *next;
1294};
1295 1540
1296#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1297#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1298 1543
1299/** high level stuff ********************************************************/ 1544/** high level stuff ********************************************************/
… …
1301static int 1546static int
1302coro_state_destroy (pTHX_ struct coro *coro) 1547coro_state_destroy (pTHX_ struct coro *coro)
1303{ 1548{
1304 if (coro->flags & CF_DESTROYED) 1549 if (coro->flags & CF_DESTROYED)
1305 return 0; 1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1306 1554
1307 coro->flags |= CF_DESTROYED; 1555 coro->flags |= CF_DESTROYED;
1308 1556
1309 if (coro->flags & CF_READY) 1557 if (coro->flags & CF_READY)
1310 { 1558 {
1311 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1312 /* alternative: look through all ready queues and remove the coro */ 1560 /* alternative: look through all ready queues and remove the coro */
1313 LOCK;
1314 --coro_nready; 1561 --coro_nready;
1315 UNLOCK;
1316 } 1562 }
1317 else 1563 else
1318 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1319 1565
1320 if (coro->mainstack && coro->mainstack != main_mainstack) 1566 if (coro->mainstack
1321 { 1567 && coro->mainstack != main_mainstack
1322 struct coro temp; 1568 && coro->slot
1323 1569 && !PL_dirty)
1324 if (coro->flags & CF_RUNNING)
1325 croak ("FATAL: tried to destroy currently running coroutine");
1326
1327 save_perl (aTHX_ &temp);
1328 load_perl (aTHX_ coro);
1329
1330 coro_destroy (aTHX_ coro); 1570 coro_destruct_perl (aTHX_ coro);
1331
1332 load_perl (aTHX_ &temp);
1333
1334 coro->slot = 0;
1335 }
1336 1571
1337 cctx_destroy (coro->cctx); 1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1338 SvREFCNT_dec (coro->args); 1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1339 1576
1340 if (coro->next) coro->next->prev = coro->prev; 1577 if (coro->next) coro->next->prev = coro->prev;
1341 if (coro->prev) coro->prev->next = coro->next; 1578 if (coro->prev) coro->prev->next = coro->next;
1342 if (coro == coro_first) coro_first = coro->next; 1579 if (coro == coro_first) coro_first = coro->next;
1343 1580
… …
1381# define MGf_DUP 0 1618# define MGf_DUP 0
1382#endif 1619#endif
1383}; 1620};
1384 1621
1385static void 1622static void
1386prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1387{ 1624{
1388 ta->prev = SvSTATE (prev_sv); 1625 ta->prev = SvSTATE (prev_sv);
1389 ta->next = SvSTATE (next_sv); 1626 ta->next = SvSTATE (next_sv);
1390 TRANSFER_CHECK (*ta); 1627 TRANSFER_CHECK (*ta);
1391} 1628}
1392 1629
1393static void 1630static void
1394api_transfer (SV *prev_sv, SV *next_sv) 1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1395{ 1632{
1396 dTHX;
1397 struct transfer_args ta; 1633 struct coro_transfer_args ta;
1398 1634
1399 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1400 TRANSFER (ta, 1); 1636 TRANSFER (ta, 1);
1401} 1637}
1402 1638
1403/** Coro ********************************************************************/ 1639/** Coro ********************************************************************/
1404 1640
1405static void 1641INLINE void
1406coro_enq (pTHX_ SV *coro_sv) 1642coro_enq (pTHX_ struct coro *coro)
1407{ 1643{
1408 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1409}
1410 1645
1411static SV * 1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1412coro_deq (pTHX) 1654coro_deq (pTHX)
1413{ 1655{
1414 int prio; 1656 int prio;
1415 1657
1416 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1417 if (AvFILLp (coro_ready [prio]) >= 0) 1659 {
1418 return av_shift (coro_ready [prio]); 1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1419 1669
1420 return 0; 1670 return 0;
1421} 1671}
1422 1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
1676 dTHX;
1677 dSP;
1678
1679 ENTER;
1680 SAVETMPS;
1681
1682 PUSHMARK (SP);
1683 PUTBACK;
1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1685
1686 FREETMPS;
1687 LEAVE;
1688}
1689
1423static int 1690static int
1424api_ready (SV *coro_sv) 1691api_ready (pTHX_ SV *coro_sv)
1425{ 1692{
1426 dTHX;
1427 struct coro *coro;
1428 SV *sv_hook;
1429 void (*xs_hook)(void);
1430
1431 if (SvROK (coro_sv))
1432 coro_sv = SvRV (coro_sv);
1433
1434 coro = SvSTATE (coro_sv); 1693 struct coro *coro = SvSTATE (coro_sv);
1435 1694
1436 if (coro->flags & CF_READY) 1695 if (coro->flags & CF_READY)
1437 return 0; 1696 return 0;
1438 1697
1439 coro->flags |= CF_READY; 1698 coro->flags |= CF_READY;
1440 1699
1441 LOCK; 1700 coro_enq (aTHX_ coro);
1442 1701
1443 sv_hook = coro_nready ? 0 : coro_readyhook; 1702 if (!coro_nready++)
1444 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1703 if (coroapi.readyhook)
1445 1704 coroapi.readyhook ();
1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1447 ++coro_nready;
1448
1449 UNLOCK;
1450
1451 if (sv_hook)
1452 {
1453 dSP;
1454
1455 ENTER;
1456 SAVETMPS;
1457
1458 PUSHMARK (SP);
1459 PUTBACK;
1460 call_sv (sv_hook, G_DISCARD);
1461 SPAGAIN;
1462
1463 FREETMPS;
1464 LEAVE;
1465 }
1466
1467 if (xs_hook)
1468 xs_hook ();
1469 1705
1470 return 1; 1706 return 1;
1471} 1707}
1472 1708
1473static int 1709static int
1474api_is_ready (SV *coro_sv) 1710api_is_ready (pTHX_ SV *coro_sv)
1475{ 1711{
1476 dTHX;
1477 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1478} 1713}
1479 1714
1480static void 1715/* expects to own a reference to next->hv */
1716INLINE void
1481prepare_schedule (pTHX_ struct transfer_args *ta) 1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1482{ 1718{
1483 SV *prev_sv, *next_sv;
1484
1485 for (;;)
1486 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX);
1489
1490 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv))
1492 {
1493 dSP;
1494 UNLOCK;
1495
1496 ENTER;
1497 SAVETMPS;
1498
1499 PUSHMARK (SP);
1500 PUTBACK;
1501 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1502 SPAGAIN;
1503
1504 FREETMPS;
1505 LEAVE;
1506 continue;
1507 }
1508
1509 ta->next = SvSTATE (next_sv);
1510
1511 /* cannot transfer to destroyed coros, skip and look for next */
1512 if (expect_false (ta->next->flags & CF_DESTROYED))
1513 {
1514 UNLOCK;
1515 SvREFCNT_dec (next_sv);
1516 /* coro_nready is already taken care of by destroy */
1517 continue;
1518 }
1519
1520 --coro_nready;
1521 UNLOCK;
1522 break;
1523 }
1524
1525 /* free this only after the transfer */
1526 prev_sv = SvRV (coro_current); 1719 SV *prev_sv = SvRV (coro_current);
1720
1527 ta->prev = SvSTATE (prev_sv); 1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1528 TRANSFER_CHECK (*ta); 1724 TRANSFER_CHECK (*ta);
1529 assert (ta->next->flags & CF_READY); 1725
1530 ta->next->flags &= ~CF_READY;
1531 SvRV_set (coro_current, next_sv); 1726 SvRV_set (coro_current, (SV *)next->hv);
1532 1727
1533 LOCK;
1534 free_coro_mortal (aTHX); 1728 free_coro_mortal (aTHX);
1535 coro_mortal = prev_sv; 1729 coro_mortal = prev_sv;
1536 UNLOCK;
1537} 1730}
1538 1731
1539static void 1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
1736 {
1737 struct coro *next = coro_deq (aTHX);
1738
1739 if (expect_true (next))
1740 {
1741 /* cannot transfer to destroyed coros, skip and look for next */
1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1744 else
1745 {
1746 next->flags &= ~CF_READY;
1747 --coro_nready;
1748
1749 prepare_schedule_to (aTHX_ ta, next);
1750 break;
1751 }
1752 }
1753 else
1754 {
1755 /* nothing to schedule: call the idle handler */
1756 if (SvROK (sv_idle)
1757 && SvOBJECT (SvRV (sv_idle)))
1758 {
1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1760 api_ready (aTHX_ SvRV (sv_idle));
1761 --coro_nready;
1762 }
1763 else
1764 {
1765 /* TODO: deprecated, remove, cannot work reliably *//*D*/
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
1540prepare_cede (pTHX_ struct transfer_args *ta) 1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
1541{ 1784{
1542 api_ready (coro_current); 1785 api_ready (aTHX_ coro_current);
1543 prepare_schedule (aTHX_ ta); 1786 prepare_schedule (aTHX_ ta);
1544} 1787}
1545 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
1546static int 1822static int
1547prepare_cede_notself (pTHX_ struct transfer_args *ta) 1823api_cede (pTHX)
1548{ 1824{
1549 if (coro_nready) 1825 struct coro_transfer_args ta;
1550 { 1826
1551 SV *prev = SvRV (coro_current);
1552 prepare_schedule (aTHX_ ta); 1827 prepare_cede (aTHX_ &ta);
1553 api_ready (prev); 1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
1554 return 1; 1832 return 1;
1555 } 1833 }
1556 else 1834 else
1557 return 0; 1835 return 0;
1558} 1836}
1559 1837
1560static void
1561api_schedule (void)
1562{
1563 dTHX;
1564 struct transfer_args ta;
1565
1566 prepare_schedule (aTHX_ &ta);
1567 TRANSFER (ta, 1);
1568}
1569
1570static int 1838static int
1571api_cede (void) 1839api_cede_notself (pTHX)
1572{ 1840{
1573 dTHX; 1841 if (coro_nready)
1842 {
1574 struct transfer_args ta; 1843 struct coro_transfer_args ta;
1575 1844
1576 prepare_cede (aTHX_ &ta); 1845 prepare_cede_notself (aTHX_ &ta);
1577
1578 if (expect_true (ta.prev != ta.next))
1579 {
1580 TRANSFER (ta, 1); 1846 TRANSFER (ta, 1);
1581 return 1; 1847 return 1;
1582 } 1848 }
1583 else 1849 else
1584 return 0; 1850 return 0;
1585} 1851}
1586 1852
1587static int 1853static void
1588api_cede_notself (void)
1589{
1590 dTHX;
1591 struct transfer_args ta;
1592
1593 if (prepare_cede_notself (aTHX_ &ta))
1594 {
1595 TRANSFER (ta, 1);
1596 return 1;
1597 }
1598 else
1599 return 0;
1600}
1601
1602static void
1603api_trace (SV *coro_sv, int flags) 1854api_trace (pTHX_ SV *coro_sv, int flags)
1604{ 1855{
1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv); 1856 struct coro *coro = SvSTATE (coro_sv);
1607 1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1608 if (flags & CC_TRACE) 1861 if (flags & CC_TRACE)
1609 { 1862 {
1610 if (!coro->cctx) 1863 if (!coro->cctx)
1611 coro->cctx = cctx_new (); 1864 coro->cctx = cctx_new_run ();
1612 else if (!(coro->cctx->flags & CC_TRACE)) 1865 else if (!(coro->cctx->flags & CC_TRACE))
1613 croak ("cannot enable tracing on coroutine with custom stack"); 1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1614 1867
1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1616 } 1869 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 { 1871 {
… …
1623 else 1876 else
1624 coro->slot->runops = RUNOPS_DEFAULT; 1877 coro->slot->runops = RUNOPS_DEFAULT;
1625 } 1878 }
1626} 1879}
1627 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 /* items are actually not so common, so optimise for this case */
1922 if (items)
1923 {
1924 av_extend (av, items - 1);
1925
1926 for (i = 0; i < items; ++i)
1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
1928 }
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
1950 struct coro *coro = (struct coro *)frame->data;
1951
1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
1965 }
1966
1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)S_GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2105 SV *data = (SV *)S_GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
2111}
2112
2113static SV *
2114coro_new_rouse_cb (pTHX)
2115{
2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2120
2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2122 SvREFCNT_dec (data); /* magicext increases the refcount */
2123
2124 SvREFCNT_dec (coro->rouse_cb);
2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
2258 {
2259 /* ampersand-form of call, use @_ instead of stack */
2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2337 slf_cv = cv;
2338
2339 /* we patch the op, and then re-run the whole call */
2340 /* we have to put the same argument on the stack for this to work */
2341 /* and this will be done by pp_restore */
2342 slf_restore.op_next = (OP *)&slf_restore;
2343 slf_restore.op_type = OP_CUSTOM;
2344 slf_restore.op_ppaddr = pp_restore;
2345 slf_restore.op_first = PL_op;
2346
2347 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2348
2349 if (PL_op->op_flags & OPf_STACKED)
2350 {
2351 if (items > slf_arga)
2352 {
2353 slf_arga = items;
2354 free (slf_argv);
2355 slf_argv = malloc (slf_arga * sizeof (SV *));
2356 }
2357
2358 slf_argc = items;
2359
2360 for (i = 0; i < items; ++i)
2361 slf_argv [i] = SvREFCNT_inc (arg [i]);
2362 }
2363 else
2364 slf_argc = 0;
2365
2366 PL_op->op_ppaddr = pp_slf;
2367 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2368
2369 PL_op = (OP *)&slf_restore;
2370}
2371
2372/*****************************************************************************/
2373/* dynamic wind */
2374
2375static void
2376on_enterleave_call (pTHX_ SV *cb)
2377{
2378 dSP;
2379
2380 PUSHSTACK;
2381
2382 PUSHMARK (SP);
2383 PUTBACK;
2384 call_sv (cb, G_VOID | G_DISCARD);
2385 SPAGAIN;
2386
2387 POPSTACK;
2388}
2389
2390static SV *
2391coro_avp_pop_and_free (pTHX_ AV **avp)
2392{
2393 AV *av = *avp;
2394 SV *res = av_pop (av);
2395
2396 if (AvFILLp (av) < 0)
2397 {
2398 *avp = 0;
2399 SvREFCNT_dec (av);
2400 }
2401
2402 return res;
2403}
2404
2405static void
2406coro_pop_on_enter (pTHX_ void *coro)
2407{
2408 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2409 SvREFCNT_dec (cb);
2410}
2411
2412static void
2413coro_pop_on_leave (pTHX_ void *coro)
2414{
2415 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2416 on_enterleave_call (aTHX_ sv_2mortal (cb));
2417}
2418
2419/*****************************************************************************/
2420/* PerlIO::cede */
2421
2422typedef struct
2423{
2424 PerlIOBuf base;
2425 NV next, every;
2426} PerlIOCede;
2427
2428static IV
2429PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432
2433 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2434 self->next = nvtime () + self->every;
2435
2436 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2437}
2438
2439static SV *
2440PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2441{
2442 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2443
2444 return newSVnv (self->every);
2445}
2446
2447static IV
2448PerlIOCede_flush (pTHX_ PerlIO *f)
2449{
2450 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2451 double now = nvtime ();
2452
2453 if (now >= self->next)
2454 {
2455 api_cede (aTHX);
2456 self->next = now + self->every;
2457 }
2458
2459 return PerlIOBuf_flush (aTHX_ f);
2460}
2461
2462static PerlIO_funcs PerlIO_cede =
2463{
2464 sizeof(PerlIO_funcs),
2465 "cede",
2466 sizeof(PerlIOCede),
2467 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2468 PerlIOCede_pushed,
2469 PerlIOBuf_popped,
2470 PerlIOBuf_open,
2471 PerlIOBase_binmode,
2472 PerlIOCede_getarg,
2473 PerlIOBase_fileno,
2474 PerlIOBuf_dup,
2475 PerlIOBuf_read,
2476 PerlIOBuf_unread,
2477 PerlIOBuf_write,
2478 PerlIOBuf_seek,
2479 PerlIOBuf_tell,
2480 PerlIOBuf_close,
2481 PerlIOCede_flush,
2482 PerlIOBuf_fill,
2483 PerlIOBase_eof,
2484 PerlIOBase_error,
2485 PerlIOBase_clearerr,
2486 PerlIOBase_setlinebuf,
2487 PerlIOBuf_get_base,
2488 PerlIOBuf_bufsiz,
2489 PerlIOBuf_get_ptr,
2490 PerlIOBuf_get_cnt,
2491 PerlIOBuf_set_ptrcnt,
2492};
2493
2494/*****************************************************************************/
2495/* Coro::Semaphore & Coro::Signal */
2496
2497static SV *
2498coro_waitarray_new (pTHX_ int count)
2499{
2500 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2501 AV *av = newAV ();
2502 SV **ary;
2503
2504 /* unfortunately, building manually saves memory */
2505 Newx (ary, 2, SV *);
2506 AvALLOC (av) = ary;
2507#if PERL_VERSION_ATLEAST (5,10,0)
2508 AvARRAY (av) = ary;
2509#else
2510 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2511 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2512 SvPVX ((SV *)av) = (char *)ary;
2513#endif
2514 AvMAX (av) = 1;
2515 AvFILLp (av) = 0;
2516 ary [0] = newSViv (count);
2517
2518 return newRV_noinc ((SV *)av);
2519}
2520
2521/* semaphore */
2522
2523static void
2524coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2525{
2526 SV *count_sv = AvARRAY (av)[0];
2527 IV count = SvIVX (count_sv);
2528
2529 count += adjust;
2530 SvIVX (count_sv) = count;
2531
2532 /* now wake up as many waiters as are expected to lock */
2533 while (count > 0 && AvFILLp (av) > 0)
2534 {
2535 SV *cb;
2536
2537 /* swap first two elements so we can shift a waiter */
2538 AvARRAY (av)[0] = AvARRAY (av)[1];
2539 AvARRAY (av)[1] = count_sv;
2540 cb = av_shift (av);
2541
2542 if (SvOBJECT (cb))
2543 {
2544 api_ready (aTHX_ cb);
2545 --count;
2546 }
2547 else if (SvTYPE (cb) == SVt_PVCV)
2548 {
2549 dSP;
2550 PUSHMARK (SP);
2551 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2554 }
2555
2556 SvREFCNT_dec (cb);
2557 }
2558}
2559
2560static void
2561coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2562{
2563 /* call $sem->adjust (0) to possibly wake up some other waiters */
2564 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2565}
2566
2567static int
2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2569{
2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
2572
2573 /* if we are about to throw, don't actually acquire the lock, just throw */
2574 if (CORO_THROW)
2575 return 0;
2576 else if (SvIVX (count_sv) > 0)
2577 {
2578 SvSTATE_current->on_destroy = 0;
2579
2580 if (acquire)
2581 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2582 else
2583 coro_semaphore_adjust (aTHX_ av, 0);
2584
2585 return 0;
2586 }
2587 else
2588 {
2589 int i;
2590 /* if we were woken up but can't down, we look through the whole */
2591 /* waiters list and only add us if we aren't in there already */
2592 /* this avoids some degenerate memory usage cases */
2593
2594 for (i = 1; i <= AvFILLp (av); ++i)
2595 if (AvARRAY (av)[i] == SvRV (coro_current))
2596 return 1;
2597
2598 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2599 return 1;
2600 }
2601}
2602
2603static int
2604slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2607}
2608
2609static int
2610slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2611{
2612 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2613}
2614
2615static void
2616slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2617{
2618 AV *av = (AV *)SvRV (arg [0]);
2619
2620 if (SvIVX (AvARRAY (av)[0]) > 0)
2621 {
2622 frame->data = (void *)av;
2623 frame->prepare = prepare_nop;
2624 }
2625 else
2626 {
2627 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2628
2629 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2630 frame->prepare = prepare_schedule;
2631
2632 /* to avoid race conditions when a woken-up coro gets terminated */
2633 /* we arrange for a temporary on_destroy that calls adjust (0) */
2634 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2635 }
2636}
2637
2638static void
2639slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2642 frame->check = slf_check_semaphore_down;
2643}
2644
2645static void
2646slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (items >= 2)
2649 {
2650 /* callback form */
2651 AV *av = (AV *)SvRV (arg [0]);
2652 SV *cb_cv = s_get_cv_croak (arg [1]);
2653
2654 av_push (av, SvREFCNT_inc_NN (cb_cv));
2655
2656 if (SvIVX (AvARRAY (av)[0]) > 0)
2657 coro_semaphore_adjust (aTHX_ av, 0);
2658
2659 frame->prepare = prepare_nop;
2660 frame->check = slf_check_nop;
2661 }
2662 else
2663 {
2664 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2665 frame->check = slf_check_semaphore_wait;
2666 }
2667}
2668
2669/* signal */
2670
2671static void
2672coro_signal_wake (pTHX_ AV *av, int count)
2673{
2674 SvIVX (AvARRAY (av)[0]) = 0;
2675
2676 /* now signal count waiters */
2677 while (count > 0 && AvFILLp (av) > 0)
2678 {
2679 SV *cb;
2680
2681 /* swap first two elements so we can shift a waiter */
2682 cb = AvARRAY (av)[0];
2683 AvARRAY (av)[0] = AvARRAY (av)[1];
2684 AvARRAY (av)[1] = cb;
2685
2686 cb = av_shift (av);
2687
2688 if (SvTYPE (cb) == SVt_PVCV)
2689 {
2690 dSP;
2691 PUSHMARK (SP);
2692 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2693 PUTBACK;
2694 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2695 }
2696 else
2697 {
2698 api_ready (aTHX_ cb);
2699 sv_setiv (cb, 0); /* signal waiter */
2700 }
2701
2702 SvREFCNT_dec (cb);
2703
2704 --count;
2705 }
2706}
2707
2708static int
2709slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2710{
2711 /* if we are about to throw, also stop waiting */
2712 return SvROK ((SV *)frame->data) && !CORO_THROW;
2713}
2714
2715static void
2716slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 AV *av = (AV *)SvRV (arg [0]);
2719
2720 if (items >= 2)
2721 {
2722 SV *cb_cv = s_get_cv_croak (arg [1]);
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]))
2726 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else if (SvIVX (AvARRAY (av)[0]))
2732 {
2733 SvIVX (AvARRAY (av)[0]) = 0;
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2740
2741 av_push (av, waiter);
2742
2743 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2744 frame->prepare = prepare_schedule;
2745 frame->check = slf_check_signal_wait;
2746 }
2747}
2748
2749/*****************************************************************************/
2750/* Coro::AIO */
2751
2752#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2753
2754/* helper storage struct */
2755struct io_state
2756{
2757 int errorno;
2758 I32 laststype; /* U16 in 5.10.0 */
2759 int laststatval;
2760 Stat_t statcache;
2761};
2762
2763static void
2764coro_aio_callback (pTHX_ CV *cv)
2765{
2766 dXSARGS;
2767 AV *state = (AV *)S_GENSUB_ARG;
2768 SV *coro = av_pop (state);
2769 SV *data_sv = newSV (sizeof (struct io_state));
2770
2771 av_extend (state, items - 1);
2772
2773 sv_upgrade (data_sv, SVt_PV);
2774 SvCUR_set (data_sv, sizeof (struct io_state));
2775 SvPOK_only (data_sv);
2776
2777 {
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 data->errorno = errno;
2781 data->laststype = PL_laststype;
2782 data->laststatval = PL_laststatval;
2783 data->statcache = PL_statcache;
2784 }
2785
2786 /* now build the result vector out of all the parameters and the data_sv */
2787 {
2788 int i;
2789
2790 for (i = 0; i < items; ++i)
2791 av_push (state, SvREFCNT_inc_NN (ST (i)));
2792 }
2793
2794 av_push (state, data_sv);
2795
2796 api_ready (aTHX_ coro);
2797 SvREFCNT_dec (coro);
2798 SvREFCNT_dec ((AV *)state);
2799}
2800
2801static int
2802slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2803{
2804 AV *state = (AV *)frame->data;
2805
2806 /* if we are about to throw, return early */
2807 /* this does not cancel the aio request, but at least */
2808 /* it quickly returns */
2809 if (CORO_THROW)
2810 return 0;
2811
2812 /* one element that is an RV? repeat! */
2813 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2814 return 1;
2815
2816 /* restore status */
2817 {
2818 SV *data_sv = av_pop (state);
2819 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2820
2821 errno = data->errorno;
2822 PL_laststype = data->laststype;
2823 PL_laststatval = data->laststatval;
2824 PL_statcache = data->statcache;
2825
2826 SvREFCNT_dec (data_sv);
2827 }
2828
2829 /* push result values */
2830 {
2831 dSP;
2832 int i;
2833
2834 EXTEND (SP, AvFILLp (state) + 1);
2835 for (i = 0; i <= AvFILLp (state); ++i)
2836 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2837
2838 PUTBACK;
2839 }
2840
2841 return 0;
2842}
2843
2844static void
2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2846{
2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2848 SV *coro_hv = SvRV (coro_current);
2849 struct coro *coro = SvSTATE_hv (coro_hv);
2850
2851 /* put our coroutine id on the state arg */
2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
2853
2854 /* first see whether we have a non-zero priority and set it as AIO prio */
2855 if (coro->prio)
2856 {
2857 dSP;
2858
2859 static SV *prio_cv;
2860 static SV *prio_sv;
2861
2862 if (expect_false (!prio_cv))
2863 {
2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2865 prio_sv = newSViv (0);
2866 }
2867
2868 PUSHMARK (SP);
2869 sv_setiv (prio_sv, coro->prio);
2870 XPUSHs (prio_sv);
2871
2872 PUTBACK;
2873 call_sv (prio_cv, G_VOID | G_DISCARD);
2874 }
2875
2876 /* now call the original request */
2877 {
2878 dSP;
2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2880 int i;
2881
2882 PUSHMARK (SP);
2883
2884 /* first push all args to the stack */
2885 EXTEND (SP, items + 1);
2886
2887 for (i = 0; i < items; ++i)
2888 PUSHs (arg [i]);
2889
2890 /* now push the callback closure */
2891 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2892
2893 /* now call the AIO function - we assume our request is uncancelable */
2894 PUTBACK;
2895 call_sv ((SV *)req, G_VOID | G_DISCARD);
2896 }
2897
2898 /* now that the requets is going, we loop toll we have a result */
2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
2902}
2903
2904static void
2905coro_aio_req_xs (pTHX_ CV *cv)
2906{
2907 dXSARGS;
2908
2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2910
2911 XSRETURN_EMPTY;
2912}
2913
2914/*****************************************************************************/
2915
2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
2919
2920/*****************************************************************************/
2921
2922static SV *
2923coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2924{
2925 SV *coro_sv;
2926 struct coro *coro;
2927 MAGIC *mg;
2928 HV *hv;
2929 SV *cb;
2930 int i;
2931
2932 if (argc > 0)
2933 {
2934 cb = s_get_cv_croak (argv [0]);
2935
2936 if (!is_coro)
2937 {
2938 if (CvISXSUB (cb))
2939 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2940
2941 if (!CvROOT (cb))
2942 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2943 }
2944 }
2945
2946 Newz (0, coro, 1, struct coro);
2947 coro->args = newAV ();
2948 coro->flags = CF_NEW;
2949
2950 if (coro_first) coro_first->prev = coro;
2951 coro->next = coro_first;
2952 coro_first = coro;
2953
2954 coro->hv = hv = newHV ();
2955 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2956 mg->mg_flags |= MGf_DUP;
2957 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2958
2959 if (argc > 0)
2960 {
2961 av_extend (coro->args, argc + is_coro - 1);
2962
2963 if (is_coro)
2964 {
2965 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2966 cb = (SV *)cv_coro_run;
2967 }
2968
2969 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2970
2971 for (i = 1; i < argc; i++)
2972 av_push (coro->args, newSVsv (argv [i]));
2973 }
2974
2975 return coro_sv;
2976}
2977
1628MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2978MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1629 2979
1630PROTOTYPES: DISABLE 2980PROTOTYPES: DISABLE
1631 2981
1632BOOT: 2982BOOT:
1633{ 2983{
1634#ifdef USE_ITHREADS 2984#ifdef USE_ITHREADS
1635 MUTEX_INIT (&coro_mutex); 2985# if CORO_PTHREAD
2986 coro_thx = PERL_GET_CONTEXT;
2987# endif
1636#endif 2988#endif
1637 BOOT_PAGESIZE; 2989 BOOT_PAGESIZE;
2990
2991 cctx_current = cctx_new_empty ();
1638 2992
1639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2993 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2994 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1641 2995
1642 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2996 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1658 main_top_env = PL_top_env; 3012 main_top_env = PL_top_env;
1659 3013
1660 while (main_top_env->je_prev) 3014 while (main_top_env->je_prev)
1661 main_top_env = main_top_env->je_prev; 3015 main_top_env = main_top_env->je_prev;
1662 3016
3017 {
3018 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3019
3020 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3021 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3022
3023 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3024 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3025 }
3026
1663 coroapi.ver = CORO_API_VERSION; 3027 coroapi.ver = CORO_API_VERSION;
1664 coroapi.rev = CORO_API_REVISION; 3028 coroapi.rev = CORO_API_REVISION;
3029
1665 coroapi.transfer = api_transfer; 3030 coroapi.transfer = api_transfer;
1666 3031
3032 coroapi.sv_state = SvSTATE_;
3033 coroapi.execute_slf = api_execute_slf;
3034 coroapi.prepare_nop = prepare_nop;
3035 coroapi.prepare_schedule = prepare_schedule;
3036 coroapi.prepare_cede = prepare_cede;
3037 coroapi.prepare_cede_notself = prepare_cede_notself;
3038
3039 {
3040 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3041
3042 if (!svp) croak ("Time::HiRes is required");
3043 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3044
3045 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3046
3047 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3048 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3049 }
3050
1667 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3051 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1668} 3052}
1669 3053
1670SV * 3054SV *
1671new (char *klass, ...) 3055new (SV *klass, ...)
3056 ALIAS:
3057 Coro::new = 1
1672 CODE: 3058 CODE:
1673{ 3059 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1674 struct coro *coro; 3060 OUTPUT:
1675 MAGIC *mg;
1676 HV *hv;
1677 int i;
1678
1679 Newz (0, coro, 1, struct coro);
1680 coro->args = newAV ();
1681 coro->flags = CF_NEW;
1682
1683 if (coro_first) coro_first->prev = coro;
1684 coro->next = coro_first;
1685 coro_first = coro;
1686
1687 coro->hv = hv = newHV ();
1688 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1689 mg->mg_flags |= MGf_DUP;
1690 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1691
1692 av_extend (coro->args, items - 1);
1693 for (i = 1; i < items; i++)
1694 av_push (coro->args, newSVsv (ST (i)));
1695}
1696 OUTPUT:
1697 RETVAL 3061 RETVAL
1698 3062
1699# these not obviously related functions are all rolled into the same xs
1700# function to increase chances that they all will call transfer with the same
1701# stack offset
1702void 3063void
1703_set_stacklevel (...) 3064transfer (...)
1704 ALIAS: 3065 PROTOTYPE: $$
1705 Coro::State::transfer = 1 3066 CODE:
1706 Coro::schedule = 2 3067 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1707 Coro::cede = 3
1708 Coro::cede_notself = 4
1709 CODE:
1710{
1711 struct transfer_args ta;
1712
1713 PUTBACK;
1714 switch (ix)
1715 {
1716 case 0:
1717 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1718 ta.next = 0;
1719 break;
1720
1721 case 1:
1722 if (items != 2)
1723 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1724
1725 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1726 break;
1727
1728 case 2:
1729 prepare_schedule (aTHX_ &ta);
1730 break;
1731
1732 case 3:
1733 prepare_cede (aTHX_ &ta);
1734 break;
1735
1736 case 4:
1737 if (!prepare_cede_notself (aTHX_ &ta))
1738 XSRETURN_EMPTY;
1739
1740 break;
1741 }
1742 SPAGAIN;
1743
1744 BARRIER;
1745 PUTBACK;
1746 TRANSFER (ta, 0);
1747 SPAGAIN; /* might be the sp of a different coroutine now */
1748 /* be extra careful not to ever do anything after TRANSFER */
1749}
1750 3068
1751bool 3069bool
1752_destroy (SV *coro_sv) 3070_destroy (SV *coro_sv)
1753 CODE: 3071 CODE:
1754 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3072 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1759_exit (int code) 3077_exit (int code)
1760 PROTOTYPE: $ 3078 PROTOTYPE: $
1761 CODE: 3079 CODE:
1762 _exit (code); 3080 _exit (code);
1763 3081
3082SV *
3083clone (Coro::State coro)
3084 CODE:
3085{
3086#if CORO_CLONE
3087 struct coro *ncoro = coro_clone (aTHX_ coro);
3088 MAGIC *mg;
3089 /* TODO: too much duplication */
3090 ncoro->hv = newHV ();
3091 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3092 mg->mg_flags |= MGf_DUP;
3093 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3094#else
3095 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3096#endif
3097}
3098 OUTPUT:
3099 RETVAL
3100
1764int 3101int
1765cctx_stacksize (int new_stacksize = 0) 3102cctx_stacksize (int new_stacksize = 0)
3103 PROTOTYPE: ;$
1766 CODE: 3104 CODE:
1767 RETVAL = coro_stacksize; 3105 RETVAL = cctx_stacksize;
1768 if (new_stacksize) 3106 if (new_stacksize)
3107 {
1769 coro_stacksize = new_stacksize; 3108 cctx_stacksize = new_stacksize;
3109 ++cctx_gen;
3110 }
1770 OUTPUT: 3111 OUTPUT:
1771 RETVAL 3112 RETVAL
1772 3113
1773int 3114int
3115cctx_max_idle (int max_idle = 0)
3116 PROTOTYPE: ;$
3117 CODE:
3118 RETVAL = cctx_max_idle;
3119 if (max_idle > 1)
3120 cctx_max_idle = max_idle;
3121 OUTPUT:
3122 RETVAL
3123
3124int
1774cctx_count () 3125cctx_count ()
3126 PROTOTYPE:
1775 CODE: 3127 CODE:
1776 RETVAL = cctx_count; 3128 RETVAL = cctx_count;
1777 OUTPUT: 3129 OUTPUT:
1778 RETVAL 3130 RETVAL
1779 3131
1780int 3132int
1781cctx_idle () 3133cctx_idle ()
3134 PROTOTYPE:
1782 CODE: 3135 CODE:
1783 RETVAL = cctx_idle; 3136 RETVAL = cctx_idle;
1784 OUTPUT: 3137 OUTPUT:
1785 RETVAL 3138 RETVAL
1786 3139
1787void 3140void
1788list () 3141list ()
3142 PROTOTYPE:
1789 PPCODE: 3143 PPCODE:
1790{ 3144{
1791 struct coro *coro; 3145 struct coro *coro;
1792 for (coro = coro_first; coro; coro = coro->next) 3146 for (coro = coro_first; coro; coro = coro->next)
1793 if (coro->hv) 3147 if (coro->hv)
… …
1798call (Coro::State coro, SV *coderef) 3152call (Coro::State coro, SV *coderef)
1799 ALIAS: 3153 ALIAS:
1800 eval = 1 3154 eval = 1
1801 CODE: 3155 CODE:
1802{ 3156{
1803 if (coro->mainstack) 3157 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1804 { 3158 {
1805 struct coro temp; 3159 struct coro *current = SvSTATE_current;
1806 3160
1807 if (!(coro->flags & CF_RUNNING)) 3161 if (current != coro)
1808 { 3162 {
1809 PUTBACK; 3163 PUTBACK;
1810 save_perl (aTHX_ &temp); 3164 save_perl (aTHX_ current);
1811 load_perl (aTHX_ coro); 3165 load_perl (aTHX_ coro);
3166 SPAGAIN;
1812 } 3167 }
1813 3168
1814 {
1815 dSP;
1816 ENTER;
1817 SAVETMPS;
1818 PUTBACK;
1819 PUSHSTACK; 3169 PUSHSTACK;
3170
1820 PUSHMARK (SP); 3171 PUSHMARK (SP);
3172 PUTBACK;
1821 3173
1822 if (ix) 3174 if (ix)
1823 eval_sv (coderef, 0); 3175 eval_sv (coderef, 0);
1824 else 3176 else
1825 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3177 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1826 3178
1827 POPSTACK; 3179 POPSTACK;
1828 SPAGAIN; 3180 SPAGAIN;
1829 FREETMPS;
1830 LEAVE;
1831 PUTBACK;
1832 }
1833 3181
1834 if (!(coro->flags & CF_RUNNING)) 3182 if (current != coro)
1835 { 3183 {
3184 PUTBACK;
1836 save_perl (aTHX_ coro); 3185 save_perl (aTHX_ coro);
1837 load_perl (aTHX_ &temp); 3186 load_perl (aTHX_ current);
1838 SPAGAIN; 3187 SPAGAIN;
1839 } 3188 }
1840 } 3189 }
1841} 3190}
1842 3191
… …
1846 ALIAS: 3195 ALIAS:
1847 is_ready = CF_READY 3196 is_ready = CF_READY
1848 is_running = CF_RUNNING 3197 is_running = CF_RUNNING
1849 is_new = CF_NEW 3198 is_new = CF_NEW
1850 is_destroyed = CF_DESTROYED 3199 is_destroyed = CF_DESTROYED
3200 is_suspended = CF_SUSPENDED
1851 CODE: 3201 CODE:
1852 RETVAL = boolSV (coro->flags & ix); 3202 RETVAL = boolSV (coro->flags & ix);
1853 OUTPUT: 3203 OUTPUT:
1854 RETVAL 3204 RETVAL
1855 3205
1856void 3206void
3207throw (Coro::State self, SV *throw = &PL_sv_undef)
3208 PROTOTYPE: $;$
3209 CODE:
3210{
3211 struct coro *current = SvSTATE_current;
3212 SV **throwp = self == current ? &CORO_THROW : &self->except;
3213 SvREFCNT_dec (*throwp);
3214 SvGETMAGIC (throw);
3215 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3216}
3217
3218void
1857api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3219api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3220 PROTOTYPE: $;$
3221 C_ARGS: aTHX_ coro, flags
1858 3222
1859SV * 3223SV *
1860has_cctx (Coro::State coro) 3224has_cctx (Coro::State coro)
1861 PROTOTYPE: $ 3225 PROTOTYPE: $
1862 CODE: 3226 CODE:
1863 RETVAL = boolSV (!!coro->cctx); 3227 /* maybe manage the running flag differently */
3228 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1864 OUTPUT: 3229 OUTPUT:
1865 RETVAL 3230 RETVAL
1866 3231
1867int 3232int
1868is_traced (Coro::State coro) 3233is_traced (Coro::State coro)
… …
1870 CODE: 3235 CODE:
1871 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3236 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1872 OUTPUT: 3237 OUTPUT:
1873 RETVAL 3238 RETVAL
1874 3239
1875IV 3240UV
1876rss (Coro::State coro) 3241rss (Coro::State coro)
1877 PROTOTYPE: $ 3242 PROTOTYPE: $
1878 ALIAS: 3243 ALIAS:
1879 usecount = 1 3244 usecount = 1
1880 CODE: 3245 CODE:
… …
1886 OUTPUT: 3251 OUTPUT:
1887 RETVAL 3252 RETVAL
1888 3253
1889void 3254void
1890force_cctx () 3255force_cctx ()
3256 PROTOTYPE:
1891 CODE: 3257 CODE:
3258 cctx_current->idle_sp = 0;
3259
3260void
3261swap_defsv (Coro::State self)
3262 PROTOTYPE: $
3263 ALIAS:
3264 swap_defav = 1
3265 CODE:
3266 if (!self->slot)
3267 croak ("cannot swap state with coroutine that has no saved state,");
3268 else
3269 {
3270 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3271 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3272
3273 SV *tmp = *src; *src = *dst; *dst = tmp;
3274 }
3275
3276void
3277cancel (Coro::State self)
3278 CODE:
3279 coro_state_destroy (aTHX_ self);
3280 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3281
3282
3283SV *
3284enable_times (int enabled = enable_times)
3285 CODE:
3286{
3287 RETVAL = boolSV (enable_times);
3288
3289 if (enabled != enable_times)
3290 {
3291 enable_times = enabled;
3292
3293 coro_times_update ();
3294 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3295 }
3296}
3297 OUTPUT:
3298 RETVAL
3299
3300void
3301times (Coro::State self)
3302 PPCODE:
3303{
1892 struct coro *coro = SvSTATE (coro_current); 3304 struct coro *current = SvSTATE (coro_current);
1893 coro->cctx->idle_sp = 0; 3305
3306 if (expect_false (current == self))
3307 {
3308 coro_times_update ();
3309 coro_times_add (SvSTATE (coro_current));
3310 }
3311
3312 EXTEND (SP, 2);
3313 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3314 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3315
3316 if (expect_false (current == self))
3317 coro_times_sub (SvSTATE (coro_current));
3318}
1894 3319
1895MODULE = Coro::State PACKAGE = Coro 3320MODULE = Coro::State PACKAGE = Coro
1896 3321
1897BOOT: 3322BOOT:
1898{ 3323{
1899 int i;
1900
1901 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1902 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3324 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1903 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3325 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1904 3326 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3327 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
1905 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3328 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1906 SvREADONLY_on (coro_current); 3329 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3330 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3331 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3332 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1907 3333
3334 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3335 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3336 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3337 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3338
1908 coro_stash = gv_stashpv ("Coro", TRUE); 3339 coro_stash = gv_stashpv ("Coro", TRUE);
1909 3340
1910 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3341 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1911 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3342 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1912 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3343 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1913 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3344 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1914 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3345 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1915 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3346 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1916
1917 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1918 coro_ready[i] = newAV ();
1919 3347
1920 { 3348 {
1921 SV *sv = perl_get_sv ("Coro::API", TRUE); 3349 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1922 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1923 3350
1924 coroapi.schedule = api_schedule; 3351 coroapi.schedule = api_schedule;
3352 coroapi.schedule_to = api_schedule_to;
1925 coroapi.cede = api_cede; 3353 coroapi.cede = api_cede;
1926 coroapi.cede_notself = api_cede_notself; 3354 coroapi.cede_notself = api_cede_notself;
1927 coroapi.ready = api_ready; 3355 coroapi.ready = api_ready;
1928 coroapi.is_ready = api_is_ready; 3356 coroapi.is_ready = api_is_ready;
1929 coroapi.nready = &coro_nready; 3357 coroapi.nready = coro_nready;
1930 coroapi.current = coro_current; 3358 coroapi.current = coro_current;
1931 3359
1932 GCoroAPI = &coroapi; 3360 /*GCoroAPI = &coroapi;*/
1933 sv_setiv (sv, (IV)&coroapi); 3361 sv_setiv (sv, (IV)&coroapi);
1934 SvREADONLY_on (sv); 3362 SvREADONLY_on (sv);
1935 } 3363 }
1936} 3364}
3365
3366SV *
3367async (...)
3368 PROTOTYPE: &@
3369 CODE:
3370 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3371 api_ready (aTHX_ RETVAL);
3372 OUTPUT:
3373 RETVAL
3374
3375void
3376terminate (...)
3377 CODE:
3378 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3379
3380void
3381schedule (...)
3382 CODE:
3383 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3384
3385void
3386schedule_to (...)
3387 CODE:
3388 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3389
3390void
3391cede_to (...)
3392 CODE:
3393 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3394
3395void
3396cede (...)
3397 CODE:
3398 CORO_EXECUTE_SLF_XS (slf_init_cede);
3399
3400void
3401cede_notself (...)
3402 CODE:
3403 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1937 3404
1938void 3405void
1939_set_current (SV *current) 3406_set_current (SV *current)
1940 PROTOTYPE: $ 3407 PROTOTYPE: $
1941 CODE: 3408 CODE:
1942 SvREFCNT_dec (SvRV (coro_current)); 3409 SvREFCNT_dec (SvRV (coro_current));
1943 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3410 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1944 3411
1945void 3412void
1946_set_readyhook (SV *hook) 3413_set_readyhook (SV *hook)
1947 PROTOTYPE: $ 3414 PROTOTYPE: $
1948 CODE: 3415 CODE:
1949 LOCK;
1950 SvREFCNT_dec (coro_readyhook); 3416 SvREFCNT_dec (coro_readyhook);
3417 SvGETMAGIC (hook);
3418 if (SvOK (hook))
3419 {
1951 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3420 coro_readyhook = newSVsv (hook);
1952 UNLOCK; 3421 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3422 }
3423 else
3424 {
3425 coro_readyhook = 0;
3426 CORO_READYHOOK = 0;
3427 }
1953 3428
1954int 3429int
1955prio (Coro::State coro, int newprio = 0) 3430prio (Coro::State coro, int newprio = 0)
3431 PROTOTYPE: $;$
1956 ALIAS: 3432 ALIAS:
1957 nice = 1 3433 nice = 1
1958 CODE: 3434 CODE:
1959{ 3435{
1960 RETVAL = coro->prio; 3436 RETVAL = coro->prio;
… …
1962 if (items > 1) 3438 if (items > 1)
1963 { 3439 {
1964 if (ix) 3440 if (ix)
1965 newprio = coro->prio - newprio; 3441 newprio = coro->prio - newprio;
1966 3442
1967 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3443 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1968 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3444 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1969 3445
1970 coro->prio = newprio; 3446 coro->prio = newprio;
1971 } 3447 }
1972} 3448}
1973 OUTPUT: 3449 OUTPUT:
… …
1975 3451
1976SV * 3452SV *
1977ready (SV *self) 3453ready (SV *self)
1978 PROTOTYPE: $ 3454 PROTOTYPE: $
1979 CODE: 3455 CODE:
1980 RETVAL = boolSV (api_ready (self)); 3456 RETVAL = boolSV (api_ready (aTHX_ self));
1981 OUTPUT: 3457 OUTPUT:
1982 RETVAL 3458 RETVAL
1983 3459
1984int 3460int
1985nready (...) 3461nready (...)
… …
1988 RETVAL = coro_nready; 3464 RETVAL = coro_nready;
1989 OUTPUT: 3465 OUTPUT:
1990 RETVAL 3466 RETVAL
1991 3467
1992void 3468void
1993throw (Coro::State self, SV *throw = &PL_sv_undef) 3469suspend (Coro::State self)
1994 PROTOTYPE: $;$ 3470 PROTOTYPE: $
3471 CODE:
3472 self->flags |= CF_SUSPENDED;
3473
3474void
3475resume (Coro::State self)
3476 PROTOTYPE: $
3477 CODE:
3478 self->flags &= ~CF_SUSPENDED;
3479
3480void
3481_pool_handler (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3484
3485void
3486async_pool (SV *cv, ...)
3487 PROTOTYPE: &@
3488 PPCODE:
3489{
3490 HV *hv = (HV *)av_pop (av_async_pool);
3491 AV *av = newAV ();
3492 SV *cb = ST (0);
3493 int i;
3494
3495 av_extend (av, items - 2);
3496 for (i = 1; i < items; ++i)
3497 av_push (av, SvREFCNT_inc_NN (ST (i)));
3498
3499 if ((SV *)hv == &PL_sv_undef)
3500 {
3501 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3502 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3503 SvREFCNT_dec (sv);
3504 }
3505
3506 {
3507 struct coro *coro = SvSTATE_hv (hv);
3508
3509 assert (!coro->invoke_cb);
3510 assert (!coro->invoke_av);
3511 coro->invoke_cb = SvREFCNT_inc (cb);
3512 coro->invoke_av = av;
3513 }
3514
3515 api_ready (aTHX_ (SV *)hv);
3516
3517 if (GIMME_V != G_VOID)
3518 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3519 else
3520 SvREFCNT_dec (hv);
3521}
3522
3523SV *
3524rouse_cb ()
3525 PROTOTYPE:
3526 CODE:
3527 RETVAL = coro_new_rouse_cb (aTHX);
3528 OUTPUT:
3529 RETVAL
3530
3531void
3532rouse_wait (...)
3533 PROTOTYPE: ;$
3534 PPCODE:
3535 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3536
3537void
3538on_enter (SV *block)
3539 ALIAS:
3540 on_leave = 1
3541 PROTOTYPE: &
3542 CODE:
3543{
3544 struct coro *coro = SvSTATE_current;
3545 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3546
3547 block = s_get_cv_croak (block);
3548
3549 if (!*avp)
3550 *avp = newAV ();
3551
3552 av_push (*avp, SvREFCNT_inc (block));
3553
3554 if (!ix)
3555 on_enterleave_call (aTHX_ block);
3556
3557 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3558 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3559 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3560}
3561
3562
3563MODULE = Coro::State PACKAGE = PerlIO::cede
3564
3565BOOT:
3566 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3567
3568
3569MODULE = Coro::State PACKAGE = Coro::Semaphore
3570
3571SV *
3572new (SV *klass, SV *count = 0)
3573 CODE:
3574{
3575 int semcnt = 1;
3576
3577 if (count)
3578 {
3579 SvGETMAGIC (count);
3580
3581 if (SvOK (count))
3582 semcnt = SvIV (count);
3583 }
3584
3585 RETVAL = sv_bless (
3586 coro_waitarray_new (aTHX_ semcnt),
3587 GvSTASH (CvGV (cv))
3588 );
3589}
3590 OUTPUT:
3591 RETVAL
3592
3593# helper for Coro::Channel and others
3594SV *
3595_alloc (int count)
3596 CODE:
3597 RETVAL = coro_waitarray_new (aTHX_ count);
3598 OUTPUT:
3599 RETVAL
3600
3601SV *
3602count (SV *self)
3603 CODE:
3604 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3605 OUTPUT:
3606 RETVAL
3607
3608void
3609up (SV *self, int adjust = 1)
3610 ALIAS:
3611 adjust = 1
1995 CODE: 3612 CODE:
1996 SvREFCNT_dec (self->throw); 3613 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1997 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1998 3614
1999void 3615void
2000swap_defsv (Coro::State self) 3616down (...)
2001 PROTOTYPE: $
2002 ALIAS:
2003 swap_defav = 1
2004 CODE: 3617 CODE:
2005 if (!self->slot) 3618 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2006 croak ("cannot swap state with coroutine that has no saved state"); 3619
3620void
3621wait (...)
3622 CODE:
3623 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3624
3625void
3626try (SV *self)
3627 PPCODE:
3628{
3629 AV *av = (AV *)SvRV (self);
3630 SV *count_sv = AvARRAY (av)[0];
3631 IV count = SvIVX (count_sv);
3632
3633 if (count > 0)
3634 {
3635 --count;
3636 SvIVX (count_sv) = count;
3637 XSRETURN_YES;
3638 }
3639 else
3640 XSRETURN_NO;
3641}
3642
3643void
3644waiters (SV *self)
3645 PPCODE:
3646{
3647 AV *av = (AV *)SvRV (self);
3648 int wcount = AvFILLp (av) + 1 - 1;
3649
3650 if (GIMME_V == G_SCALAR)
3651 XPUSHs (sv_2mortal (newSViv (wcount)));
2007 else 3652 else
2008 { 3653 {
2009 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3654 int i;
2010 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3655 EXTEND (SP, wcount);
2011 3656 for (i = 1; i <= wcount; ++i)
2012 SV *tmp = *src; *src = *dst; *dst = tmp; 3657 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2013 } 3658 }
3659}
2014 3660
2015# for async_pool speedup 3661MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3662
2016void 3663void
2017_pool_1 (SV *cb) 3664_may_delete (SV *sem, int count, int extra_refs)
3665 PPCODE:
3666{
3667 AV *av = (AV *)SvRV (sem);
3668
3669 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3670 && AvFILLp (av) == 0 /* no waiters, just count */
3671 && SvIV (AvARRAY (av)[0]) == count)
3672 XSRETURN_YES;
3673
3674 XSRETURN_NO;
3675}
3676
3677MODULE = Coro::State PACKAGE = Coro::Signal
3678
3679SV *
3680new (SV *klass)
2018 CODE: 3681 CODE:
2019{ 3682 RETVAL = sv_bless (
2020 struct coro *coro = SvSTATE (coro_current); 3683 coro_waitarray_new (aTHX_ 0),
2021 HV *hv = (HV *)SvRV (coro_current); 3684 GvSTASH (CvGV (cv))
2022 AV *defav = GvAV (PL_defgv); 3685 );
2023 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 3686 OUTPUT:
2024 AV *invoke_av; 3687 RETVAL
2025 int i, len;
2026
2027 if (!invoke)
2028 {
2029 SV *old = PL_diehook;
2030 PL_diehook = 0;
2031 SvREFCNT_dec (old);
2032 croak ("\3async_pool terminate\2\n");
2033 }
2034
2035 SvREFCNT_dec (coro->saved_deffh);
2036 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2037
2038 hv_store (hv, "desc", sizeof ("desc") - 1,
2039 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2040
2041 invoke_av = (AV *)SvRV (invoke);
2042 len = av_len (invoke_av);
2043
2044 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2045
2046 if (len > 0)
2047 {
2048 av_fill (defav, len - 1);
2049 for (i = 0; i < len; ++i)
2050 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2051 }
2052
2053 SvREFCNT_dec (invoke);
2054}
2055 3688
2056void 3689void
2057_pool_2 (SV *cb) 3690wait (...)
3691 CODE:
3692 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3693
3694void
3695broadcast (SV *self)
3696 CODE:
3697{
3698 AV *av = (AV *)SvRV (self);
3699 coro_signal_wake (aTHX_ av, AvFILLp (av));
3700}
3701
3702void
3703send (SV *self)
3704 CODE:
3705{
3706 AV *av = (AV *)SvRV (self);
3707
3708 if (AvFILLp (av))
3709 coro_signal_wake (aTHX_ av, 1);
3710 else
3711 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3712}
3713
3714IV
3715awaited (SV *self)
2058 CODE: 3716 CODE:
2059{ 3717 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
2060 struct coro *coro = SvSTATE (coro_current);
2061
2062 sv_setsv (cb, &PL_sv_undef);
2063
2064 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2065 coro->saved_deffh = 0;
2066
2067 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2068 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2069 {
2070 SV *old = PL_diehook;
2071 PL_diehook = 0;
2072 SvREFCNT_dec (old);
2073 croak ("\3async_pool terminate\2\n");
2074 }
2075
2076 av_clear (GvAV (PL_defgv));
2077 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2078 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2079
2080 coro->prio = 0;
2081
2082 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2083 api_trace (coro_current, 0);
2084
2085 av_push (av_async_pool, newSVsv (coro_current));
2086}
2087
2088
2089MODULE = Coro::State PACKAGE = Coro::AIO
2090
2091SV *
2092_get_state ()
2093 CODE:
2094{
2095 struct io_state *data;
2096
2097 RETVAL = newSV (sizeof (struct io_state));
2098 data = (struct io_state *)SvPVX (RETVAL);
2099 SvCUR_set (RETVAL, sizeof (struct io_state));
2100 SvPOK_only (RETVAL);
2101
2102 data->errorno = errno;
2103 data->laststype = PL_laststype;
2104 data->laststatval = PL_laststatval;
2105 data->statcache = PL_statcache;
2106}
2107 OUTPUT: 3718 OUTPUT:
2108 RETVAL 3719 RETVAL
2109 3720
2110void
2111_set_state (char *data_)
2112 PROTOTYPE: $
2113 CODE:
2114{
2115 struct io_state *data = (void *)data_;
2116
2117 errno = data->errorno;
2118 PL_laststype = data->laststype;
2119 PL_laststatval = data->laststatval;
2120 PL_statcache = data->statcache;
2121}
2122
2123 3721
2124MODULE = Coro::State PACKAGE = Coro::AnyEvent 3722MODULE = Coro::State PACKAGE = Coro::AnyEvent
2125 3723
2126BOOT: 3724BOOT:
2127 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3725 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2128 3726
2129SV * 3727void
2130_schedule (...) 3728_schedule (...)
2131 PROTOTYPE: @
2132 CODE: 3729 CODE:
2133{ 3730{
2134 static int incede; 3731 static int incede;
2135 3732
2136 api_cede_notself (); 3733 api_cede_notself (aTHX);
2137 3734
2138 ++incede; 3735 ++incede;
2139 while (coro_nready >= incede && api_cede ()) 3736 while (coro_nready >= incede && api_cede (aTHX))
2140 ; 3737 ;
2141 3738
2142 sv_setsv (sv_activity, &PL_sv_undef); 3739 sv_setsv (sv_activity, &PL_sv_undef);
2143 if (coro_nready >= incede) 3740 if (coro_nready >= incede)
2144 { 3741 {
2145 PUSHMARK (SP); 3742 PUSHMARK (SP);
2146 PUTBACK; 3743 PUTBACK;
2147 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3744 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2148 SPAGAIN;
2149 } 3745 }
2150 3746
2151 --incede; 3747 --incede;
2152} 3748}
2153 3749
3750
3751MODULE = Coro::State PACKAGE = Coro::AIO
3752
3753void
3754_register (char *target, char *proto, SV *req)
3755 CODE:
3756{
3757 SV *req_cv = s_get_cv_croak (req);
3758 /* newXSproto doesn't return the CV on 5.8 */
3759 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3760 sv_setpv ((SV *)slf_cv, proto);
3761 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3762}
3763
3764MODULE = Coro::State PACKAGE = Coro::Select
3765
3766void
3767patch_pp_sselect ()
3768 CODE:
3769 if (!coro_old_pp_sselect)
3770 {
3771 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3772 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3773 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3774 }
3775
3776void
3777unpatch_pp_sselect ()
3778 CODE:
3779 if (coro_old_pp_sselect)
3780 {
3781 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3782 coro_old_pp_sselect = 0;
3783 }
3784
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