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Comparing Coro/Coro/State.xs (file contents):
Revision 1.251 by root, Thu Oct 30 09:44:31 2008 UTC vs.
Revision 1.366 by root, Tue Jul 21 03:39:58 2009 UTC

… …
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h" 9#include "perliol.h"
10 10
11#include "patchlevel.h" 11#include "schmorp.h"
12 12
13#include <stdio.h> 13#include <stdio.h>
14#include <errno.h> 14#include <errno.h>
15#include <assert.h> 15#include <assert.h>
16 16
17#ifdef WIN32 17#ifdef WIN32
18# undef setjmp 18# undef setjmp
19# undef longjmp 19# undef longjmp
20# undef _exit 20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
22#else 22#else
23# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif 24#endif
25 25
26#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108 55
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD 57# undef CORO_STACKGUARD
111#endif 58#endif
112 59
… …
119# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif 67#endif
121 68
122/* 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
123 * 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
124#define dSTACKLEVEL volatile char stacklevel 75# define dSTACKLEVEL volatile void *stacklevel
125#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
126 78
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
128 80
129#if __GNUC__ >= 3 81#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value)) 83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
133#else 85#else
134# define attribute(x) 86# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr) 87# define expect(expr,value) (expr)
88# define INLINE static
137#endif 89#endif
138 90
139#define expect_false(expr) expect ((expr) != 0, 0) 91#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1) 92#define expect_true(expr) expect ((expr) != 0, 1)
141 93
142#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
143 95
144#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
145 98
146#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
147static perl_mutex coro_mutex; 100# if CORO_PTHREAD
148# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
149# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
150#else
151# define LOCK (void)0
152# define UNLOCK (void)0
153#endif 103#endif
154 104
155/* helper storage struct for Coro::AIO */ 105#ifdef __linux
156struct io_state 106# include <time.h> /* for timespec */
157{ 107# include <syscall.h> /* for SYS_* */
158 AV *res; 108# ifdef SYS_clock_gettime
159 int errorno; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
160 I32 laststype; 110# define CORO_CLOCK_MONOTONIC 1
161 int laststatval; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
162 Stat_t statcache; 112# endif
163}; 113#endif
164 114
165static double (*nvtime)(); /* so why doesn't it take void? */ 115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
166 117
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;
167static size_t coro_stacksize = CORO_STACKSIZE; 123static size_t cctx_stacksize = CORO_STACKSIZE;
168static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
169static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env; 126static JMPENV *main_top_env;
171static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
172static 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 */
173 133
174static GV *irsgv; /* $/ */ 134static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */ 135static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook; 136static SV *rv_diehook;
177static SV *rv_warnhook; 137static SV *rv_warnhook;
178static HV *hv_sig; /* %SIG */ 138static HV *hv_sig; /* %SIG */
179 139
180/* async_pool helper stuff */ 140/* async_pool helper stuff */
181static SV *sv_pool_rss; 141static SV *sv_pool_rss;
182static SV *sv_pool_size; 142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
183static AV *av_async_pool; 144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
184 148
185/* Coro::AnyEvent */ 149/* Coro::AnyEvent */
186static SV *sv_activity; 150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
187 157
188static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
189static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
190 160
191enum { 161enum {
… …
196 CC_TRACE_LINE = 0x10, /* trace each statement */ 166 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198}; 168};
199 169
200/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
201typedef struct coro_cctx { 171typedef struct coro_cctx
172{
202 struct coro_cctx *next; 173 struct coro_cctx *next;
203 174
204 /* the stack */ 175 /* the stack */
205 void *sptr; 176 void *sptr;
206 size_t ssize; 177 size_t ssize;
… …
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env; 182 JMPENV *top_env;
212 coro_context cctx; 183 coro_context cctx;
213 184
185 U32 gen;
214#if CORO_USE_VALGRIND 186#if CORO_USE_VALGRIND
215 int valgrind_id; 187 int valgrind_id;
216#endif 188#endif
217 unsigned char flags; 189 unsigned char flags;
218} coro_cctx; 190} coro_cctx;
219 191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
220enum { 196enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */ 197 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */ 198 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */ 199 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
225}; 202};
226 203
227/* the structure where most of the perl state is stored, overlaid on the cxstack */ 204/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct { 205typedef struct
206{
229 SV *defsv; 207 SV *defsv;
230 AV *defav; 208 AV *defav;
231 SV *errsv; 209 SV *errsv;
232 SV *irsgv; 210 SV *irsgv;
211 HV *hinthv;
233#define VAR(name,type) type name; 212#define VAR(name,type) type name;
234# include "state.h" 213# include "state.h"
235#undef VAR 214#undef VAR
236} perl_slots; 215} perl_slots;
237 216
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
239 218
240/* this is a structure representing a perl-level coroutine */ 219/* this is a structure representing a perl-level coroutine */
241struct coro { 220struct coro {
242 /* the c coroutine allocated to this perl coroutine, if any */ 221 /* the C coroutine allocated to this perl coroutine, if any */
243 coro_cctx *cctx; 222 coro_cctx *cctx;
244 223
245 /* process data */ 224 /* ready queue */
225 struct coro *next_ready;
226
227 /* state data */
228 struct CoroSLF slf_frame; /* saved slf frame */
246 AV *mainstack; 229 AV *mainstack;
247 perl_slots *slot; /* basically the saved sp */ 230 perl_slots *slot; /* basically the saved sp */
248 231
232 CV *startcv; /* the CV to execute */
249 AV *args; /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
250 int refcnt; /* coroutines are refcounted, yes */ 234 int refcnt; /* coroutines are refcounted, yes */
251 int flags; /* CF_ flags */ 235 int flags; /* CF_ flags */
252 HV *hv; /* the perl hash associated with this coro, if any */ 236 HV *hv; /* the perl hash associated with this coro, if any */
237 void (*on_destroy)(pTHX_ struct coro *coro);
253 238
254 /* statistics */ 239 /* statistics */
255 int usecount; /* number of transfers to this coro */ 240 int usecount; /* number of transfers to this coro */
256 241
257 /* coro process data */ 242 /* coro process data */
258 int prio; 243 int prio;
259 SV *throw; /* exception to be thrown */ 244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
260 246
261 /* async_pool */ 247 /* async_pool */
262 SV *saved_deffh; 248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
263 258
264 /* linked list */ 259 /* linked list */
265 struct coro *next, *prev; 260 struct coro *next, *prev;
266}; 261};
267 262
268typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
269typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
270 265
266/* the following variables are effectively part of the perl context */
267/* and get copied between struct coro and these variables */
268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
271/** Coro ********************************************************************/ 271/** Coro ********************************************************************/
272 272
273#define PRIO_MAX 3 273#define CORO_PRIO_MAX 3
274#define PRIO_HIGH 1 274#define CORO_PRIO_HIGH 1
275#define PRIO_NORMAL 0 275#define CORO_PRIO_NORMAL 0
276#define PRIO_LOW -1 276#define CORO_PRIO_LOW -1
277#define PRIO_IDLE -3 277#define CORO_PRIO_IDLE -3
278#define PRIO_MIN -4 278#define CORO_PRIO_MIN -4
279 279
280/* for Coro.pm */ 280/* for Coro.pm */
281static SV *coro_current; 281static SV *coro_current;
282static SV *coro_readyhook; 282static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static int coro_nready; 284static CV *cv_coro_run, *cv_coro_terminate;
285static struct coro *coro_first; 285static struct coro *coro_first;
286#define coro_nready coroapi.nready
287
288/** Coro::Select ************************************************************/
289
290static OP *(*coro_old_pp_sselect) (pTHX);
291static SV *coro_select_select;
292
293/* horrible hack, but if it works... */
294static OP *
295coro_pp_sselect (aTHX)
296{
297 dSP;
298 PUSHMARK (SP - 4); /* fake argument list */
299 XPUSHs (coro_select_select);
300 PUTBACK;
301
302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
303 PL_op->op_flags |= OPf_STACKED;
304 PL_op->op_private = 0;
305 return PL_ppaddr [OP_ENTERSUB](aTHX);
306}
286 307
287/** lowlevel stuff **********************************************************/ 308/** lowlevel stuff **********************************************************/
288 309
289static SV * 310static SV *
290coro_get_sv (pTHX_ const char *name, int create) 311coro_get_sv (pTHX_ const char *name, int create)
… …
314 get_hv (name, create); 335 get_hv (name, create);
315#endif 336#endif
316 return get_hv (name, create); 337 return get_hv (name, create);
317} 338}
318 339
340INLINE void
341coro_times_update ()
342{
343#ifdef coro_clock_gettime
344 struct timespec ts;
345
346 ts.tv_sec = ts.tv_nsec = 0;
347 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
348 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
349
350 ts.tv_sec = ts.tv_nsec = 0;
351 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
352 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
353#else
354 dTHX;
355 UV tv[2];
356
357 u2time (aTHX_ tv);
358 time_real [0] = tv [0];
359 time_real [1] = tv [1] * 1000;
360#endif
361}
362
363INLINE void
364coro_times_add (struct coro *c)
365{
366 c->t_real [1] += time_real [1];
367 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
368 c->t_real [0] += time_real [0];
369
370 c->t_cpu [1] += time_cpu [1];
371 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
372 c->t_cpu [0] += time_cpu [0];
373}
374
375INLINE void
376coro_times_sub (struct coro *c)
377{
378 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
379 c->t_real [1] -= time_real [1];
380 c->t_real [0] -= time_real [0];
381
382 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
383 c->t_cpu [1] -= time_cpu [1];
384 c->t_cpu [0] -= time_cpu [0];
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
319static AV * 439static AV *
320coro_clone_padlist (pTHX_ CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
321{ 441{
322 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
323 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
324 444
325 newpadlist = newAV (); 445 newpadlist = newAV ();
… …
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
331#endif 451#endif
332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
333 --AvFILLp (padlist); 453 --AvFILLp (padlist);
334 454
335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
336 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
337 457
338 return newpadlist; 458 return newpadlist;
339} 459}
340 460
341static void 461static void
342free_padlist (pTHX_ AV *padlist) 462free_padlist (pTHX_ AV *padlist)
343{ 463{
344 /* may be during global destruction */ 464 /* may be during global destruction */
345 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
346 { 466 {
347 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
348 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
349 { 470 {
350 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
351 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
352 { 473 I32 j = AvFILLp (av);
353 SV *sv; 474
354 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
355 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
356
357 SvREFCNT_dec (*svp);
358 }
359 } 480 }
360 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
361 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
362 } 486 }
363} 487}
364 488
365static int 489static int
366coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
367{ 491{
368 AV *padlist; 492 AV *padlist;
369 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
370 498
371 /* casting is fun. */ 499 /* casting is fun. */
372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
373 free_padlist (aTHX_ padlist); 501 free_padlist (aTHX_ padlist);
374 502
375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
376 504
377 return 0; 505 return 0;
378} 506}
379
380#define CORO_MAGIC_type_cv PERL_MAGIC_ext
381#define CORO_MAGIC_type_state PERL_MAGIC_ext
382 507
383static MGVTBL coro_cv_vtbl = { 508static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0, 509 0, 0, 0, 0,
385 coro_cv_free 510 coro_cv_free
386}; 511};
387
388#define CORO_MAGIC(sv,type) \
389 SvMAGIC (sv) \
390 ? SvMAGIC (sv)->mg_type == type \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type) \
393 : 0
394
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
397
398static struct coro *
399SvSTATE_ (pTHX_ SV *coro)
400{
401 HV *stash;
402 MAGIC *mg;
403
404 if (SvROK (coro))
405 coro = SvRV (coro);
406
407 if (expect_false (SvTYPE (coro) != SVt_PVHV))
408 croak ("Coro::State object required");
409
410 stash = SvSTASH (coro);
411 if (expect_false (stash != coro_stash && stash != coro_state_stash))
412 {
413 /* very slow, but rare, check */
414 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
415 croak ("Coro::State object required");
416 }
417
418 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr;
420}
421
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
423 512
424/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
425static void 514static void
426get_padlist (pTHX_ CV *cv) 515get_padlist (pTHX_ CV *cv)
427{ 516{
… …
433 else 522 else
434 { 523 {
435#if CORO_PREFER_PERL_FUNCTIONS 524#if CORO_PREFER_PERL_FUNCTIONS
436 /* this is probably cleaner? but also slower! */ 525 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */ 526 /* in practise, it seems to be less stable */
438 CV *cp = Perl_cv_clone (cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
439 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
440 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
441 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
442#else 531#else
443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
444#endif 533#endif
445 } 534 }
446} 535}
447 536
448static void 537static void
… …
455 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
456 545
457 av = (AV *)mg->mg_obj; 546 av = (AV *)mg->mg_obj;
458 547
459 if (expect_false (AvFILLp (av) >= AvMAX (av))) 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
460 av_extend (av, AvMAX (av) + 1); 549 av_extend (av, AvFILLp (av) + 1);
461 550
462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
463} 552}
464 553
465/** load & save, init *******************************************************/ 554/** load & save, init *******************************************************/
555
556static void
557on_enterleave_call (pTHX_ SV *cb);
466 558
467static void 559static void
468load_perl (pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
469{ 561{
470 perl_slots *slot = c->slot; 562 perl_slots *slot = c->slot;
471 c->slot = 0; 563 c->slot = 0;
472 564
473 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
474 566
475 GvSV (PL_defgv) = slot->defsv; 567 GvSV (PL_defgv) = slot->defsv;
476 GvAV (PL_defgv) = slot->defav; 568 GvAV (PL_defgv) = slot->defav;
477 GvSV (PL_errgv) = slot->errsv; 569 GvSV (PL_errgv) = slot->errsv;
478 GvSV (irsgv) = slot->irsgv; 570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
479 572
480 #define VAR(name,type) PL_ ## name = slot->name; 573 #define VAR(name,type) PL_ ## name = slot->name;
481 # include "state.h" 574 # include "state.h"
482 #undef VAR 575 #undef VAR
483 576
… …
494 CvPADLIST (cv) = (AV *)POPs; 587 CvPADLIST (cv) = (AV *)POPs;
495 } 588 }
496 589
497 PUTBACK; 590 PUTBACK;
498 } 591 }
592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (enable_times))
597 {
598 if (expect_false (!times_valid))
599 coro_times_update ();
600
601 coro_times_sub (c);
602 }
603
604 if (expect_false (c->on_enter))
605 {
606 int i;
607
608 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
610 }
499} 611}
500 612
501static void 613static void
502save_perl (pTHX_ Coro__State c) 614save_perl (pTHX_ Coro__State c)
503{ 615{
616 if (expect_false (c->on_leave))
617 {
618 int i;
619
620 for (i = AvFILLp (c->on_leave); i >= 0; --i)
621 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
622 }
623
624 times_valid = 0;
625
626 if (expect_false (enable_times))
627 {
628 coro_times_update (); times_valid = 1;
629 coro_times_add (c);
630 }
631
632 c->except = CORO_THROW;
633 c->slf_frame = slf_frame;
634
504 { 635 {
505 dSP; 636 dSP;
506 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
507 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
508 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
518 { 649 {
519 while (expect_true (cxix >= 0)) 650 while (expect_true (cxix >= 0))
520 { 651 {
521 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
522 653
523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
524 { 655 {
525 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
526 657
527 if (expect_true (CvDEPTH (cv))) 658 if (expect_true (CvDEPTH (cv)))
528 { 659 {
… …
552 /* we manually unroll here, as usually 2 slots is enough */ 683 /* we manually unroll here, as usually 2 slots is enough */
553 if (SLOT_COUNT >= 1) CXINC; 684 if (SLOT_COUNT >= 1) CXINC;
554 if (SLOT_COUNT >= 2) CXINC; 685 if (SLOT_COUNT >= 2) CXINC;
555 if (SLOT_COUNT >= 3) CXINC; 686 if (SLOT_COUNT >= 3) CXINC;
556 { 687 {
557 int i; 688 unsigned int i;
558 for (i = 3; i < SLOT_COUNT; ++i) 689 for (i = 3; i < SLOT_COUNT; ++i)
559 CXINC; 690 CXINC;
560 } 691 }
561 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 692 cxstack_ix -= SLOT_COUNT; /* undo allocation */
562 693
563 c->mainstack = PL_mainstack; 694 c->mainstack = PL_mainstack;
564 695
565 { 696 {
566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
567 698
568 slot->defav = GvAV (PL_defgv); 699 slot->defav = GvAV (PL_defgv);
569 slot->defsv = DEFSV; 700 slot->defsv = DEFSV;
570 slot->errsv = ERRSV; 701 slot->errsv = ERRSV;
571 slot->irsgv = GvSV (irsgv); 702 slot->irsgv = GvSV (irsgv);
703 slot->hinthv = GvHV (PL_hintgv);
572 704
573 #define VAR(name,type) slot->name = PL_ ## name; 705 #define VAR(name,type) slot->name = PL_ ## name;
574 # include "state.h" 706 # include "state.h"
575 #undef VAR 707 #undef VAR
576 } 708 }
577} 709}
578 710
579/* 711/*
580 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
581 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
582 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
583 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
584 */ 716 */
585#if CORO_PREFER_PERL_FUNCTIONS 717#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks 718# define coro_init_stacks(thx) init_stacks ()
587#else 719#else
588static void 720static void
589coro_init_stacks (pTHX) 721coro_init_stacks (pTHX)
590{ 722{
591 PL_curstackinfo = new_stackinfo(32, 8); 723 PL_curstackinfo = new_stackinfo(32, 8);
… …
628 760
629/* 761/*
630 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
631 */ 763 */
632static void 764static void
633coro_destroy_stacks (pTHX) 765coro_destruct_stacks (pTHX)
634{ 766{
635 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
636 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
637 769
638 while (PL_curstackinfo) 770 while (PL_curstackinfo)
… …
654#if !PERL_VERSION_ATLEAST (5,10,0) 786#if !PERL_VERSION_ATLEAST (5,10,0)
655 Safefree (PL_retstack); 787 Safefree (PL_retstack);
656#endif 788#endif
657} 789}
658 790
791#define CORO_RSS \
792 rss += sizeof (SYM (curstackinfo)); \
793 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
794 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
795 rss += SYM (tmps_max) * sizeof (SV *); \
796 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
797 rss += SYM (scopestack_max) * sizeof (I32); \
798 rss += SYM (savestack_max) * sizeof (ANY);
799
659static size_t 800static size_t
660coro_rss (pTHX_ struct coro *coro) 801coro_rss (pTHX_ struct coro *coro)
661{ 802{
662 size_t rss = sizeof (*coro); 803 size_t rss = sizeof (*coro);
663 804
664 if (coro->mainstack) 805 if (coro->mainstack)
665 { 806 {
666 perl_slots tmp_slot;
667 perl_slots *slot;
668
669 if (coro->flags & CF_RUNNING) 807 if (coro->flags & CF_RUNNING)
670 { 808 {
671 slot = &tmp_slot; 809 #define SYM(sym) PL_ ## sym
672 810 CORO_RSS;
673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR 811 #undef SYM
676 } 812 }
677 else 813 else
678 slot = coro->slot;
679
680 if (slot)
681 { 814 {
682 rss += sizeof (slot->curstackinfo); 815 #define SYM(sym) coro->slot->sym
683 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 816 CORO_RSS;
684 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 817 #undef SYM
685 rss += slot->tmps_max * sizeof (SV *);
686 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
687 rss += slot->scopestack_max * sizeof (I32);
688 rss += slot->savestack_max * sizeof (ANY);
689
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 rss += slot->retstack_max * sizeof (OP *);
692#endif
693 } 818 }
694 } 819 }
695 820
696 return rss; 821 return rss;
697} 822}
… …
710#endif 835#endif
711 836
712/* 837/*
713 * This overrides the default magic get method of %SIG elements. 838 * This overrides the default magic get method of %SIG elements.
714 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 839 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
715 * and instead of tryign to save and restore the hash elements, we just provide 840 * and instead of trying to save and restore the hash elements, we just provide
716 * readback here. 841 * readback here.
717 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
718 * not expecting this to actually change the hook. This is a potential problem
719 * when a schedule happens then, but we ignore this.
720 */ 842 */
721static int 843static int
722coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
723{ 845{
724 const char *s = MgPV_nolen_const (mg); 846 const char *s = MgPV_nolen_const (mg);
… …
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778 900
779 if (svp) 901 if (svp)
780 { 902 {
781 SV *old = *svp; 903 SV *old = *svp;
782 *svp = newSVsv (sv); 904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
783 SvREFCNT_dec (old); 905 SvREFCNT_dec (old);
784 return 0; 906 return 0;
785 } 907 }
786 } 908 }
787 909
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789} 911}
790 912
791static void 913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
920static int
921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
792coro_setup (pTHX_ struct coro *coro) 935coro_setup (pTHX_ struct coro *coro)
793{ 936{
794 /* 937 /*
795 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
796 */ 939 */
… …
798 941
799 PL_runops = RUNOPS_DEFAULT; 942 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling; 943 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL; 944 PL_in_eval = EVAL_NULL;
802 PL_comppad = 0; 945 PL_comppad = 0;
946 PL_comppad_name = 0;
947 PL_comppad_name_fill = 0;
948 PL_comppad_name_floor = 0;
803 PL_curpm = 0; 949 PL_curpm = 0;
804 PL_curpad = 0; 950 PL_curpad = 0;
805 PL_localizing = 0; 951 PL_localizing = 0;
806 PL_dirty = 0; 952 PL_dirty = 0;
807 PL_restartop = 0; 953 PL_restartop = 0;
808#if PERL_VERSION_ATLEAST (5,10,0) 954#if PERL_VERSION_ATLEAST (5,10,0)
809 PL_parser = 0; 955 PL_parser = 0;
810#endif 956#endif
957 PL_hints = 0;
811 958
812 /* recreate the die/warn hooks */ 959 /* recreate the die/warn hooks */
813 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 960 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
814 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 961 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
815 962
816 GvSV (PL_defgv) = newSV (0); 963 GvSV (PL_defgv) = newSV (0);
817 GvAV (PL_defgv) = coro->args; coro->args = 0; 964 GvAV (PL_defgv) = coro->args; coro->args = 0;
818 GvSV (PL_errgv) = newSV (0); 965 GvSV (PL_errgv) = newSV (0);
819 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 966 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
967 GvHV (PL_hintgv) = 0;
820 PL_rs = newSVsv (GvSV (irsgv)); 968 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 969 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822 970
823 { 971 {
824 dSP; 972 dSP;
825 LOGOP myop; 973 UNOP myop;
826 974
827 Zero (&myop, 1, LOGOP); 975 Zero (&myop, 1, UNOP);
828 myop.op_next = Nullop; 976 myop.op_next = Nullop;
977 myop.op_type = OP_ENTERSUB;
829 myop.op_flags = OPf_WANT_VOID; 978 myop.op_flags = OPf_WANT_VOID;
830 979
831 PUSHMARK (SP); 980 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 981 PUSHs ((SV *)coro->startcv);
833 PUTBACK; 982 PUTBACK;
834 PL_op = (OP *)&myop; 983 PL_op = (OP *)&myop;
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 984 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836 SPAGAIN;
837 } 985 }
838 986
839 /* this newly created coroutine might be run on an existing cctx which most 987 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub. 988 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */ 989 */
844 ENTER; 990 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
845} 991 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
846 992
993 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
994 coro_setup_op.op_next = PL_op;
995 coro_setup_op.op_type = OP_ENTERSUB;
996 coro_setup_op.op_ppaddr = pp_slf;
997 /* no flags etc. required, as an init function won't be called */
998
999 PL_op = (OP *)&coro_setup_op;
1000
1001 /* copy throw, in case it was set before coro_setup */
1002 CORO_THROW = coro->except;
1003
1004 if (expect_false (enable_times))
1005 {
1006 coro_times_update ();
1007 coro_times_sub (coro);
1008 }
1009}
1010
847static void 1011static void
848coro_destroy (pTHX_ struct coro *coro) 1012coro_unwind_stacks (pTHX)
849{ 1013{
850 if (!IN_DESTRUCT) 1014 if (!IN_DESTRUCT)
851 { 1015 {
852 /* restore all saved variables and stuff */ 1016 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0); 1017 LEAVE_SCOPE (0);
… …
861 POPSTACK_TO (PL_mainstack); 1025 POPSTACK_TO (PL_mainstack);
862 1026
863 /* unwind main stack */ 1027 /* unwind main stack */
864 dounwind (-1); 1028 dounwind (-1);
865 } 1029 }
1030}
866 1031
867 SvREFCNT_dec (GvSV (PL_defgv)); 1032static void
868 SvREFCNT_dec (GvAV (PL_defgv)); 1033coro_destruct_perl (pTHX_ struct coro *coro)
869 SvREFCNT_dec (GvSV (PL_errgv)); 1034{
870 SvREFCNT_dec (PL_defoutgv); 1035 SV *svf [9];
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
873 1036
874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876 1037 {
1038 struct coro *current = SvSTATE_current;
1039
1040 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1041
1042 save_perl (aTHX_ current);
1043 load_perl (aTHX_ coro);
1044
1045 coro_unwind_stacks (aTHX);
1046 coro_destruct_stacks (aTHX);
1047
1048 // now save some sv's to be free'd later
1049 svf [0] = GvSV (PL_defgv);
1050 svf [1] = (SV *)GvAV (PL_defgv);
1051 svf [2] = GvSV (PL_errgv);
1052 svf [3] = (SV *)PL_defoutgv;
1053 svf [4] = PL_rs;
1054 svf [5] = GvSV (irsgv);
1055 svf [6] = (SV *)GvHV (PL_hintgv);
1056 svf [7] = PL_diehook;
1057 svf [8] = PL_warnhook;
1058 assert (9 == sizeof (svf) / sizeof (*svf));
1059
1060 load_perl (aTHX_ current);
1061 }
1062
1063 {
1064 unsigned int i;
1065
1066 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1067 SvREFCNT_dec (svf [i]);
1068
877 SvREFCNT_dec (coro->saved_deffh); 1069 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw); 1070 SvREFCNT_dec (coro->rouse_cb);
879 1071 SvREFCNT_dec (coro->invoke_cb);
880 coro_destroy_stacks (aTHX); 1072 SvREFCNT_dec (coro->invoke_av);
1073 }
881} 1074}
882 1075
883static void 1076INLINE void
884free_coro_mortal (pTHX) 1077free_coro_mortal (pTHX)
885{ 1078{
886 if (expect_true (coro_mortal)) 1079 if (expect_true (coro_mortal))
887 { 1080 {
888 SvREFCNT_dec (coro_mortal); 1081 SvREFCNT_dec (coro_mortal);
… …
893static int 1086static int
894runops_trace (pTHX) 1087runops_trace (pTHX)
895{ 1088{
896 COP *oldcop = 0; 1089 COP *oldcop = 0;
897 int oldcxix = -2; 1090 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx;
900 1091
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1092 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 { 1093 {
903 PERL_ASYNC_CHECK (); 1094 PERL_ASYNC_CHECK ();
904 1095
905 if (cctx->flags & CC_TRACE_ALL) 1096 if (cctx_current->flags & CC_TRACE_ALL)
906 { 1097 {
907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1098 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
908 { 1099 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1100 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910 SV **bot, **top; 1101 SV **bot, **top;
911 AV *av = newAV (); /* return values */ 1102 AV *av = newAV (); /* return values */
912 SV **cb; 1103 SV **cb;
… …
949 1140
950 if (PL_curcop != &PL_compiling) 1141 if (PL_curcop != &PL_compiling)
951 { 1142 {
952 SV **cb; 1143 SV **cb;
953 1144
954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1145 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
955 { 1146 {
956 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1147 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
957 1148
958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1149 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
959 { 1150 {
960 runops_proc_t old_runops = PL_runops;
961 dSP; 1151 dSP;
962 GV *gv = CvGV (cx->blk_sub.cv); 1152 GV *gv = CvGV (cx->blk_sub.cv);
963 SV *fullname = sv_2mortal (newSV (0)); 1153 SV *fullname = sv_2mortal (newSV (0));
964 1154
965 if (isGV (gv)) 1155 if (isGV (gv))
… …
970 SAVETMPS; 1160 SAVETMPS;
971 EXTEND (SP, 3); 1161 EXTEND (SP, 3);
972 PUSHMARK (SP); 1162 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes); 1163 PUSHs (&PL_sv_yes);
974 PUSHs (fullname); 1164 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1165 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK; 1166 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1167 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1168 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN; 1169 SPAGAIN;
980 FREETMPS; 1170 FREETMPS;
… …
983 } 1173 }
984 1174
985 oldcxix = cxstack_ix; 1175 oldcxix = cxstack_ix;
986 } 1176 }
987 1177
988 if (cctx->flags & CC_TRACE_LINE) 1178 if (cctx_current->flags & CC_TRACE_LINE)
989 { 1179 {
990 dSP; 1180 dSP;
991 1181
992 PL_runops = RUNOPS_DEFAULT; 1182 PL_runops = RUNOPS_DEFAULT;
993 ENTER; 1183 ENTER;
… …
1012 1202
1013 TAINT_NOT; 1203 TAINT_NOT;
1014 return 0; 1204 return 0;
1015} 1205}
1016 1206
1017/* inject a fake call to Coro::State::_cctx_init into the execution */ 1207static struct CoroSLF cctx_ssl_frame;
1018/* _cctx_init should be careful, as it could be called at almost any time */ 1208
1019/* during execution of a perl program */ 1209static void
1210slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1211{
1212 ta->prev = 0;
1213}
1214
1215static int
1216slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1217{
1218 *frame = cctx_ssl_frame;
1219
1220 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1221}
1222
1223/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1020static void NOINLINE 1224static void NOINLINE
1021cctx_prepare (pTHX_ coro_cctx *cctx) 1225cctx_prepare (pTHX)
1022{ 1226{
1023 dSP;
1024 LOGOP myop;
1025
1026 PL_top_env = &PL_start_env; 1227 PL_top_env = &PL_start_env;
1027 1228
1028 if (cctx->flags & CC_TRACE) 1229 if (cctx_current->flags & CC_TRACE)
1029 PL_runops = runops_trace; 1230 PL_runops = runops_trace;
1030 1231
1031 Zero (&myop, 1, LOGOP); 1232 /* we already must be executing an SLF op, there is no other valid way
1032 myop.op_next = PL_op; 1233 * that can lead to creation of a new cctx */
1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1234 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1235 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1034 1236
1035 PUSHMARK (SP); 1237 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1036 EXTEND (SP, 2); 1238 cctx_ssl_frame = slf_frame;
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1239
1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1240 slf_frame.prepare = slf_prepare_set_stacklevel;
1039 PUTBACK; 1241 slf_frame.check = slf_check_set_stacklevel;
1040 PL_op = (OP *)&myop; 1242}
1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1243
1042 SPAGAIN; 1244/* the tail of transfer: execute stuff we can only do after a transfer */
1245INLINE void
1246transfer_tail (pTHX)
1247{
1248 free_coro_mortal (aTHX);
1043} 1249}
1044 1250
1045/* 1251/*
1046 * this is a _very_ stripped down perl interpreter ;) 1252 * this is a _very_ stripped down perl interpreter ;)
1047 */ 1253 */
1048static void 1254static void
1049cctx_run (void *arg) 1255cctx_run (void *arg)
1050{ 1256{
1257#ifdef USE_ITHREADS
1258# if CORO_PTHREAD
1259 PERL_SET_CONTEXT (coro_thx);
1260# endif
1261#endif
1262 {
1051 dTHX; 1263 dTHX;
1052 1264
1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1265 /* normally we would need to skip the entersub here */
1054 UNLOCK; 1266 /* not doing so will re-execute it, which is exactly what we want */
1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next; 1267 /* PL_nop = PL_nop->op_next */
1058 1268
1059 /* inject a fake subroutine call to cctx_init */ 1269 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg); 1270 cctx_prepare (aTHX);
1061 1271
1272 /* cctx_run is the alternative tail of transfer() */
1273 transfer_tail (aTHX);
1274
1062 /* somebody or something will hit me for both perl_run and PL_restartop */ 1275 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op; 1276 PL_restartop = PL_op;
1064 perl_run (PL_curinterp); 1277 perl_run (PL_curinterp);
1065
1066 /* 1278 /*
1279 * Unfortunately, there is no way to get at the return values of the
1280 * coro body here, as perl_run destroys these
1281 */
1282
1283 /*
1067 * 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
1068 * 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)
1069 * 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
1070 * bootstrap-time "top" top_env, as we cannot restore the "main" 1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1071 * 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.
1072 */ 1291 */
1073 PL_top_env = main_top_env; 1292 PL_top_env = main_top_env;
1074 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 }
1075} 1295}
1076 1296
1077static coro_cctx * 1297static coro_cctx *
1078cctx_new () 1298cctx_new ()
1079{ 1299{
1080 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 ();
1081 void *stack_start; 1329 void *stack_start;
1082 size_t stack_size; 1330 size_t stack_size;
1083 1331
1084 ++cctx_count;
1085
1086 Newz (0, cctx, 1, coro_cctx);
1087
1088#if HAVE_MMAP 1332#if HAVE_MMAP
1089 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;
1090 /* mmap supposedly does allocate-on-write for us */ 1334 /* mmap supposedly does allocate-on-write for us */
1091 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);
1092 1336
1093 if (cctx->sptr != (void *)-1) 1337 if (cctx->sptr != (void *)-1)
1094 { 1338 {
1095# if CORO_STACKGUARD 1339 #if CORO_STACKGUARD
1096 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1097# endif 1341 #endif
1098 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1099 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1100 cctx->flags |= CC_MAPPED; 1344 cctx->flags |= CC_MAPPED;
1101 } 1345 }
1102 else 1346 else
1103#endif 1347#endif
1104 { 1348 {
1105 cctx->ssize = coro_stacksize * (long)sizeof (long); 1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1106 New (0, cctx->sptr, coro_stacksize, long); 1350 New (0, cctx->sptr, cctx_stacksize, long);
1107 1351
1108 if (!cctx->sptr) 1352 if (!cctx->sptr)
1109 { 1353 {
1110 perror ("FATAL: unable to allocate stack for coroutine"); 1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1111 _exit (EXIT_FAILURE); 1355 _exit (EXIT_FAILURE);
1112 } 1356 }
1113 1357
1114 stack_start = cctx->sptr; 1358 stack_start = cctx->sptr;
1115 stack_size = cctx->ssize; 1359 stack_size = cctx->ssize;
1116 } 1360 }
1117 1361
1118 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
1119 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);
1120 1367
1121 return cctx; 1368 return cctx;
1122} 1369}
1123 1370
… …
1125cctx_destroy (coro_cctx *cctx) 1372cctx_destroy (coro_cctx *cctx)
1126{ 1373{
1127 if (!cctx) 1374 if (!cctx)
1128 return; 1375 return;
1129 1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1130 --cctx_count; 1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1131 1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1132#if CORO_USE_VALGRIND 1385 #if CORO_USE_VALGRIND
1133 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
1134#endif 1393#endif
1135
1136#if HAVE_MMAP
1137 if (cctx->flags & CC_MAPPED)
1138 munmap (cctx->sptr, cctx->ssize);
1139 else
1140#endif
1141 Safefree (cctx->sptr); 1394 Safefree (cctx->sptr);
1395 }
1142 1396
1143 Safefree (cctx); 1397 Safefree (cctx);
1144} 1398}
1145 1399
1146/* wether this cctx should be destructed */ 1400/* wether this cctx should be destructed */
1147#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))
1148 1402
1149static coro_cctx * 1403static coro_cctx *
1150cctx_get (pTHX) 1404cctx_get (pTHX)
1151{ 1405{
1152 while (expect_true (cctx_first)) 1406 while (expect_true (cctx_first))
… …
1159 return cctx; 1413 return cctx;
1160 1414
1161 cctx_destroy (cctx); 1415 cctx_destroy (cctx);
1162 } 1416 }
1163 1417
1164 return cctx_new (); 1418 return cctx_new_run ();
1165} 1419}
1166 1420
1167static void 1421static void
1168cctx_put (coro_cctx *cctx) 1422cctx_put (coro_cctx *cctx)
1169{ 1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1170 /* free another cctx if overlimit */ 1426 /* free another cctx if overlimit */
1171 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1427 if (expect_false (cctx_idle >= cctx_max_idle))
1172 { 1428 {
1173 coro_cctx *first = cctx_first; 1429 coro_cctx *first = cctx_first;
1174 cctx_first = first->next; 1430 cctx_first = first->next;
1175 --cctx_idle; 1431 --cctx_idle;
1176 1432
… …
1185/** coroutine switching *****************************************************/ 1441/** coroutine switching *****************************************************/
1186 1442
1187static void 1443static void
1188transfer_check (pTHX_ struct coro *prev, struct coro *next) 1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1189{ 1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1190 if (expect_true (prev != next)) 1448 if (expect_true (prev != next))
1191 { 1449 {
1192 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1193 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1194 1452
1195 if (expect_false (next->flags & CF_RUNNING))
1196 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1197
1198 if (expect_false (next->flags & CF_DESTROYED)) 1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1199 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,");
1200 1455
1201#if !PERL_VERSION_ATLEAST (5,10,0) 1456#if !PERL_VERSION_ATLEAST (5,10,0)
1202 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1203 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,");
1204#endif 1459#endif
1205 } 1460 }
1206} 1461}
1207 1462
1208/* always use the TRANSFER macro */ 1463/* always use the TRANSFER macro */
1209static void NOINLINE 1464static void NOINLINE /* noinline so we have a fixed stackframe */
1210transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1211{ 1466{
1212 dSTACKLEVEL; 1467 dSTACKLEVEL;
1213 static volatile int has_throw;
1214 1468
1215 /* sometimes transfer is only called to set idle_sp */ 1469 /* sometimes transfer is only called to set idle_sp */
1216 if (expect_false (!next)) 1470 if (expect_false (!prev))
1217 { 1471 {
1218 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1472 cctx_current->idle_sp = STACKLEVEL;
1219 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 */
1220 } 1474 }
1221 else if (expect_true (prev != next)) 1475 else if (expect_true (prev != next))
1222 { 1476 {
1223 coro_cctx *prev__cctx; 1477 coro_cctx *cctx_prev;
1224 1478
1225 if (expect_false (prev->flags & CF_NEW)) 1479 if (expect_false (prev->flags & CF_NEW))
1226 { 1480 {
1227 /* create a new empty context */ 1481 /* create a new empty/source context */
1228 Newz (0, prev->cctx, 1, coro_cctx);
1229 prev->flags &= ~CF_NEW; 1482 prev->flags &= ~CF_NEW;
1230 prev->flags |= CF_RUNNING; 1483 prev->flags |= CF_RUNNING;
1231 } 1484 }
1232 1485
1233 prev->flags &= ~CF_RUNNING; 1486 prev->flags &= ~CF_RUNNING;
1234 next->flags |= CF_RUNNING; 1487 next->flags |= CF_RUNNING;
1235
1236 LOCK;
1237 1488
1238 /* first get rid of the old state */ 1489 /* first get rid of the old state */
1239 save_perl (aTHX_ prev); 1490 save_perl (aTHX_ prev);
1240 1491
1241 if (expect_false (next->flags & CF_NEW)) 1492 if (expect_false (next->flags & CF_NEW))
… …
1246 coro_setup (aTHX_ next); 1497 coro_setup (aTHX_ next);
1247 } 1498 }
1248 else 1499 else
1249 load_perl (aTHX_ next); 1500 load_perl (aTHX_ next);
1250 1501
1251 prev__cctx = prev->cctx;
1252
1253 /* possibly "free" the cctx */ 1502 /* possibly untie and reuse the cctx */
1254 if (expect_true ( 1503 if (expect_true (
1255 prev__cctx->idle_sp == STACKLEVEL 1504 cctx_current->idle_sp == STACKLEVEL
1256 && !(prev__cctx->flags & CC_TRACE) 1505 && !(cctx_current->flags & CC_TRACE)
1257 && !force_cctx 1506 && !force_cctx
1258 )) 1507 ))
1259 { 1508 {
1260 /* 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 */
1261 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));
1262 1511
1263 prev->cctx = 0;
1264
1265 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1266 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1267 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1268 if (!next->cctx) 1515 if (expect_true (!next->cctx))
1269 next->cctx = cctx_get (aTHX); 1516 next->cctx = cctx_get (aTHX);
1270 1517
1271 cctx_put (prev__cctx); 1518 cctx_put (cctx_current);
1272 } 1519 }
1520 else
1521 prev->cctx = cctx_current;
1273 1522
1274 ++next->usecount; 1523 ++next->usecount;
1275 1524
1276 if (expect_true (!next->cctx)) 1525 cctx_prev = cctx_current;
1277 next->cctx = cctx_get (aTHX); 1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1278 1527
1279 has_throw = !!next->throw; 1528 next->cctx = 0;
1280 1529
1281 if (expect_false (prev__cctx != next->cctx)) 1530 if (expect_false (cctx_prev != cctx_current))
1282 { 1531 {
1283 prev__cctx->top_env = PL_top_env; 1532 cctx_prev->top_env = PL_top_env;
1284 PL_top_env = next->cctx->top_env; 1533 PL_top_env = cctx_current->top_env;
1285 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1286 } 1535 }
1287 1536
1288 free_coro_mortal (aTHX); 1537 transfer_tail (aTHX);
1289 UNLOCK;
1290
1291 if (expect_false (has_throw))
1292 {
1293 struct coro *coro = SvSTATE (coro_current);
1294
1295 if (coro->throw)
1296 {
1297 SV *exception = coro->throw;
1298 coro->throw = 0;
1299 sv_setsv (ERRSV, exception);
1300 croak (0);
1301 }
1302 }
1303 } 1538 }
1304} 1539}
1305
1306struct transfer_args
1307{
1308 struct coro *prev, *next;
1309};
1310 1540
1311#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))
1312#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1313 1543
1314/** high level stuff ********************************************************/ 1544/** high level stuff ********************************************************/
… …
1316static int 1546static int
1317coro_state_destroy (pTHX_ struct coro *coro) 1547coro_state_destroy (pTHX_ struct coro *coro)
1318{ 1548{
1319 if (coro->flags & CF_DESTROYED) 1549 if (coro->flags & CF_DESTROYED)
1320 return 0; 1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1321 1554
1322 coro->flags |= CF_DESTROYED; 1555 coro->flags |= CF_DESTROYED;
1323 1556
1324 if (coro->flags & CF_READY) 1557 if (coro->flags & CF_READY)
1325 { 1558 {
1326 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1327 /* alternative: look through all ready queues and remove the coro */ 1560 /* alternative: look through all ready queues and remove the coro */
1328 LOCK;
1329 --coro_nready; 1561 --coro_nready;
1330 UNLOCK;
1331 } 1562 }
1332 else 1563 else
1333 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 */
1334 1565
1335 if (coro->mainstack && coro->mainstack != main_mainstack) 1566 if (coro->mainstack
1336 { 1567 && coro->mainstack != main_mainstack
1337 struct coro temp; 1568 && coro->slot
1338 1569 && !PL_dirty)
1339 if (coro->flags & CF_RUNNING)
1340 croak ("FATAL: tried to destroy currently running coroutine");
1341
1342 save_perl (aTHX_ &temp);
1343 load_perl (aTHX_ coro);
1344
1345 coro_destroy (aTHX_ coro); 1570 coro_destruct_perl (aTHX_ coro);
1346
1347 load_perl (aTHX_ &temp);
1348
1349 coro->slot = 0;
1350 }
1351 1571
1352 cctx_destroy (coro->cctx); 1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1353 SvREFCNT_dec (coro->args); 1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1354 1576
1355 if (coro->next) coro->next->prev = coro->prev; 1577 if (coro->next) coro->next->prev = coro->prev;
1356 if (coro->prev) coro->prev->next = coro->next; 1578 if (coro->prev) coro->prev->next = coro->next;
1357 if (coro == coro_first) coro_first = coro->next; 1579 if (coro == coro_first) coro_first = coro->next;
1358 1580
… …
1396# define MGf_DUP 0 1618# define MGf_DUP 0
1397#endif 1619#endif
1398}; 1620};
1399 1621
1400static void 1622static void
1401prepare_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)
1402{ 1624{
1403 ta->prev = SvSTATE (prev_sv); 1625 ta->prev = SvSTATE (prev_sv);
1404 ta->next = SvSTATE (next_sv); 1626 ta->next = SvSTATE (next_sv);
1405 TRANSFER_CHECK (*ta); 1627 TRANSFER_CHECK (*ta);
1406} 1628}
1407 1629
1408static void 1630static void
1409api_transfer (SV *prev_sv, SV *next_sv) 1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1410{ 1632{
1411 dTHX;
1412 struct transfer_args ta; 1633 struct coro_transfer_args ta;
1413 1634
1414 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1415 TRANSFER (ta, 1); 1636 TRANSFER (ta, 1);
1416} 1637}
1417 1638
1418/** Coro ********************************************************************/ 1639/** Coro ********************************************************************/
1419 1640
1420static void 1641INLINE void
1421coro_enq (pTHX_ SV *coro_sv) 1642coro_enq (pTHX_ struct coro *coro)
1422{ 1643{
1423 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1424}
1425 1645
1426static 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 *
1427coro_deq (pTHX) 1654coro_deq (pTHX)
1428{ 1655{
1429 int prio; 1656 int prio;
1430 1657
1431 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1432 if (AvFILLp (coro_ready [prio]) >= 0) 1659 {
1433 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 }
1434 1669
1435 return 0; 1670 return 0;
1436} 1671}
1437 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
1438static int 1690static int
1439api_ready (SV *coro_sv) 1691api_ready (pTHX_ SV *coro_sv)
1440{ 1692{
1441 dTHX;
1442 struct coro *coro;
1443 SV *sv_hook;
1444 void (*xs_hook)(void);
1445
1446 if (SvROK (coro_sv))
1447 coro_sv = SvRV (coro_sv);
1448
1449 coro = SvSTATE (coro_sv); 1693 struct coro *coro = SvSTATE (coro_sv);
1450 1694
1451 if (coro->flags & CF_READY) 1695 if (coro->flags & CF_READY)
1452 return 0; 1696 return 0;
1453 1697
1454 coro->flags |= CF_READY; 1698 coro->flags |= CF_READY;
1455 1699
1456 LOCK; 1700 coro_enq (aTHX_ coro);
1457 1701
1458 sv_hook = coro_nready ? 0 : coro_readyhook; 1702 if (!coro_nready++)
1459 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1703 if (coroapi.readyhook)
1460 1704 coroapi.readyhook ();
1461 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1462 ++coro_nready;
1463
1464 UNLOCK;
1465
1466 if (sv_hook)
1467 {
1468 dSP;
1469
1470 ENTER;
1471 SAVETMPS;
1472
1473 PUSHMARK (SP);
1474 PUTBACK;
1475 call_sv (sv_hook, G_DISCARD);
1476 SPAGAIN;
1477
1478 FREETMPS;
1479 LEAVE;
1480 }
1481
1482 if (xs_hook)
1483 xs_hook ();
1484 1705
1485 return 1; 1706 return 1;
1486} 1707}
1487 1708
1488static int 1709static int
1489api_is_ready (SV *coro_sv) 1710api_is_ready (pTHX_ SV *coro_sv)
1490{ 1711{
1491 dTHX;
1492 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1493} 1713}
1494 1714
1495static void 1715/* expects to own a reference to next->hv */
1716INLINE void
1496prepare_schedule (pTHX_ struct transfer_args *ta) 1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1497{ 1718{
1498 SV *prev_sv, *next_sv;
1499
1500 for (;;)
1501 {
1502 LOCK;
1503 next_sv = coro_deq (aTHX);
1504
1505 /* nothing to schedule: call the idle handler */
1506 if (expect_false (!next_sv))
1507 {
1508 dSP;
1509 UNLOCK;
1510
1511 ENTER;
1512 SAVETMPS;
1513
1514 PUSHMARK (SP);
1515 PUTBACK;
1516 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1517 SPAGAIN;
1518
1519 FREETMPS;
1520 LEAVE;
1521 continue;
1522 }
1523
1524 ta->next = SvSTATE (next_sv);
1525
1526 /* cannot transfer to destroyed coros, skip and look for next */
1527 if (expect_false (ta->next->flags & CF_DESTROYED))
1528 {
1529 UNLOCK;
1530 SvREFCNT_dec (next_sv);
1531 /* coro_nready is already taken care of by destroy */
1532 continue;
1533 }
1534
1535 --coro_nready;
1536 UNLOCK;
1537 break;
1538 }
1539
1540 /* free this only after the transfer */
1541 prev_sv = SvRV (coro_current); 1719 SV *prev_sv = SvRV (coro_current);
1720
1542 ta->prev = SvSTATE (prev_sv); 1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1543 TRANSFER_CHECK (*ta); 1724 TRANSFER_CHECK (*ta);
1544 assert (ta->next->flags & CF_READY); 1725
1545 ta->next->flags &= ~CF_READY;
1546 SvRV_set (coro_current, next_sv); 1726 SvRV_set (coro_current, (SV *)next->hv);
1547 1727
1548 LOCK;
1549 free_coro_mortal (aTHX); 1728 free_coro_mortal (aTHX);
1550 coro_mortal = prev_sv; 1729 coro_mortal = prev_sv;
1551 UNLOCK;
1552} 1730}
1553 1731
1554static 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 dSP;
1766
1767 ENTER;
1768 SAVETMPS;
1769
1770 PUSHMARK (SP);
1771 PUTBACK;
1772 call_sv (sv_idle, G_VOID | G_DISCARD);
1773
1774 FREETMPS;
1775 LEAVE;
1776 }
1777 }
1778 }
1779}
1780
1781INLINE void
1555prepare_cede (pTHX_ struct transfer_args *ta) 1782prepare_cede (pTHX_ struct coro_transfer_args *ta)
1556{ 1783{
1557 api_ready (coro_current); 1784 api_ready (aTHX_ coro_current);
1558 prepare_schedule (aTHX_ ta); 1785 prepare_schedule (aTHX_ ta);
1559} 1786}
1560 1787
1788INLINE void
1789prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1790{
1791 SV *prev = SvRV (coro_current);
1792
1793 if (coro_nready)
1794 {
1795 prepare_schedule (aTHX_ ta);
1796 api_ready (aTHX_ prev);
1797 }
1798 else
1799 prepare_nop (aTHX_ ta);
1800}
1801
1802static void
1803api_schedule (pTHX)
1804{
1805 struct coro_transfer_args ta;
1806
1807 prepare_schedule (aTHX_ &ta);
1808 TRANSFER (ta, 1);
1809}
1810
1811static void
1812api_schedule_to (pTHX_ SV *coro_sv)
1813{
1814 struct coro_transfer_args ta;
1815 struct coro *next = SvSTATE (coro_sv);
1816
1817 SvREFCNT_inc_NN (coro_sv);
1818 prepare_schedule_to (aTHX_ &ta, next);
1819}
1820
1561static int 1821static int
1562prepare_cede_notself (pTHX_ struct transfer_args *ta) 1822api_cede (pTHX)
1563{ 1823{
1564 if (coro_nready) 1824 struct coro_transfer_args ta;
1565 { 1825
1566 SV *prev = SvRV (coro_current);
1567 prepare_schedule (aTHX_ ta); 1826 prepare_cede (aTHX_ &ta);
1568 api_ready (prev); 1827
1828 if (expect_true (ta.prev != ta.next))
1829 {
1830 TRANSFER (ta, 1);
1569 return 1; 1831 return 1;
1570 } 1832 }
1571 else 1833 else
1572 return 0; 1834 return 0;
1573} 1835}
1574 1836
1575static void
1576api_schedule (void)
1577{
1578 dTHX;
1579 struct transfer_args ta;
1580
1581 prepare_schedule (aTHX_ &ta);
1582 TRANSFER (ta, 1);
1583}
1584
1585static int 1837static int
1586api_cede (void) 1838api_cede_notself (pTHX)
1587{ 1839{
1588 dTHX; 1840 if (coro_nready)
1841 {
1589 struct transfer_args ta; 1842 struct coro_transfer_args ta;
1590 1843
1591 prepare_cede (aTHX_ &ta); 1844 prepare_cede_notself (aTHX_ &ta);
1592
1593 if (expect_true (ta.prev != ta.next))
1594 {
1595 TRANSFER (ta, 1); 1845 TRANSFER (ta, 1);
1596 return 1; 1846 return 1;
1597 } 1847 }
1598 else 1848 else
1599 return 0; 1849 return 0;
1600} 1850}
1601 1851
1602static int 1852static void
1603api_cede_notself (void)
1604{
1605 dTHX;
1606 struct transfer_args ta;
1607
1608 if (prepare_cede_notself (aTHX_ &ta))
1609 {
1610 TRANSFER (ta, 1);
1611 return 1;
1612 }
1613 else
1614 return 0;
1615}
1616
1617static void
1618api_trace (SV *coro_sv, int flags) 1853api_trace (pTHX_ SV *coro_sv, int flags)
1619{ 1854{
1620 dTHX;
1621 struct coro *coro = SvSTATE (coro_sv); 1855 struct coro *coro = SvSTATE (coro_sv);
1622 1856
1857 if (coro->flags & CF_RUNNING)
1858 croak ("cannot enable tracing on a running coroutine, caught");
1859
1623 if (flags & CC_TRACE) 1860 if (flags & CC_TRACE)
1624 { 1861 {
1625 if (!coro->cctx) 1862 if (!coro->cctx)
1626 coro->cctx = cctx_new (); 1863 coro->cctx = cctx_new_run ();
1627 else if (!(coro->cctx->flags & CC_TRACE)) 1864 else if (!(coro->cctx->flags & CC_TRACE))
1628 croak ("cannot enable tracing on coroutine with custom stack"); 1865 croak ("cannot enable tracing on coroutine with custom stack, caught");
1629 1866
1630 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1867 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1631 } 1868 }
1632 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1869 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1633 { 1870 {
… …
1638 else 1875 else
1639 coro->slot->runops = RUNOPS_DEFAULT; 1876 coro->slot->runops = RUNOPS_DEFAULT;
1640 } 1877 }
1641} 1878}
1642 1879
1880static void
1881coro_call_on_destroy (pTHX_ struct coro *coro)
1882{
1883 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1884 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1885
1886 if (on_destroyp)
1887 {
1888 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1889
1890 while (AvFILLp (on_destroy) >= 0)
1891 {
1892 dSP; /* don't disturb outer sp */
1893 SV *cb = av_pop (on_destroy);
1894
1895 PUSHMARK (SP);
1896
1897 if (statusp)
1898 {
1899 int i;
1900 AV *status = (AV *)SvRV (*statusp);
1901 EXTEND (SP, AvFILLp (status) + 1);
1902
1903 for (i = 0; i <= AvFILLp (status); ++i)
1904 PUSHs (AvARRAY (status)[i]);
1905 }
1906
1907 PUTBACK;
1908 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1909 }
1910 }
1911}
1912
1913static void
1914slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 int i;
1917 HV *hv = (HV *)SvRV (coro_current);
1918 AV *av = newAV ();
1919
1920 av_extend (av, items - 1);
1921 for (i = 0; i < items; ++i)
1922 av_push (av, SvREFCNT_inc_NN (arg [i]));
1923
1924 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1925
1926 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1927 api_ready (aTHX_ sv_manager);
1928
1929 frame->prepare = prepare_schedule;
1930 frame->check = slf_check_repeat;
1931
1932 /* as a minor optimisation, we could unwind all stacks here */
1933 /* but that puts extra pressure on pp_slf, and is not worth much */
1934 /*coro_unwind_stacks (aTHX);*/
1935}
1936
1937/*****************************************************************************/
1938/* async pool handler */
1939
1643static int 1940static int
1644coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1941slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1645{ 1942{
1646 AV *padlist; 1943 HV *hv = (HV *)SvRV (coro_current);
1647 AV *av = (AV *)mg->mg_obj; 1944 struct coro *coro = (struct coro *)frame->data;
1648 1945
1649 abort (); 1946 if (!coro->invoke_cb)
1947 return 1; /* loop till we have invoke */
1948 else
1949 {
1950 hv_store (hv, "desc", sizeof ("desc") - 1,
1951 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1952
1953 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1954
1955 {
1956 dSP;
1957 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1958 PUTBACK;
1959 }
1960
1961 SvREFCNT_dec (GvAV (PL_defgv));
1962 GvAV (PL_defgv) = coro->invoke_av;
1963 coro->invoke_av = 0;
1964
1965 return 0;
1966 }
1967}
1968
1969static void
1970slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1971{
1972 HV *hv = (HV *)SvRV (coro_current);
1973 struct coro *coro = SvSTATE_hv ((SV *)hv);
1974
1975 if (expect_true (coro->saved_deffh))
1976 {
1977 /* subsequent iteration */
1978 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1979 coro->saved_deffh = 0;
1980
1981 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1982 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1983 {
1984 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1985 coro->invoke_av = newAV ();
1986
1987 frame->prepare = prepare_nop;
1988 }
1989 else
1990 {
1991 av_clear (GvAV (PL_defgv));
1992 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1993
1994 coro->prio = 0;
1995
1996 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1997 api_trace (aTHX_ coro_current, 0);
1998
1999 frame->prepare = prepare_schedule;
2000 av_push (av_async_pool, SvREFCNT_inc (hv));
2001 }
2002 }
2003 else
2004 {
2005 /* first iteration, simply fall through */
2006 frame->prepare = prepare_nop;
2007 }
2008
2009 frame->check = slf_check_pool_handler;
2010 frame->data = (void *)coro;
2011}
2012
2013/*****************************************************************************/
2014/* rouse callback */
2015
2016#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2017
2018static void
2019coro_rouse_callback (pTHX_ CV *cv)
2020{
2021 dXSARGS;
2022 SV *data = (SV *)S_GENSUB_ARG;
2023
2024 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2025 {
2026 /* first call, set args */
2027 SV *coro = SvRV (data);
2028 AV *av = newAV ();
2029
2030 SvRV_set (data, (SV *)av);
2031
2032 /* better take a full copy of the arguments */
2033 while (items--)
2034 av_store (av, items, newSVsv (ST (items)));
2035
2036 api_ready (aTHX_ coro);
2037 SvREFCNT_dec (coro);
2038 }
2039
2040 XSRETURN_EMPTY;
2041}
2042
2043static int
2044slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2045{
2046 SV *data = (SV *)frame->data;
2047
2048 if (CORO_THROW)
2049 return 0;
2050
2051 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2052 return 1;
2053
2054 /* now push all results on the stack */
2055 {
2056 dSP;
2057 AV *av = (AV *)SvRV (data);
2058 int i;
2059
2060 EXTEND (SP, AvFILLp (av) + 1);
2061 for (i = 0; i <= AvFILLp (av); ++i)
2062 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2063
2064 /* we have stolen the elements, so set length to zero and free */
2065 AvFILLp (av) = -1;
2066 av_undef (av);
2067
2068 PUTBACK;
2069 }
1650 2070
1651 return 0; 2071 return 0;
1652} 2072}
1653 2073
1654static MGVTBL coro_gensub_vtbl = { 2074static void
1655 0, 0, 0, 0, 2075slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1656 coro_gensub_free 2076{
1657}; 2077 SV *cb;
2078
2079 if (items)
2080 cb = arg [0];
2081 else
2082 {
2083 struct coro *coro = SvSTATE_current;
2084
2085 if (!coro->rouse_cb)
2086 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2087
2088 cb = sv_2mortal (coro->rouse_cb);
2089 coro->rouse_cb = 0;
2090 }
2091
2092 if (!SvROK (cb)
2093 || SvTYPE (SvRV (cb)) != SVt_PVCV
2094 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2095 croak ("Coro::rouse_wait called with illegal callback argument,");
2096
2097 {
2098 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2099 SV *data = (SV *)S_GENSUB_ARG;
2100
2101 frame->data = (void *)data;
2102 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2103 frame->check = slf_check_rouse_wait;
2104 }
2105}
2106
2107static SV *
2108coro_new_rouse_cb (pTHX)
2109{
2110 HV *hv = (HV *)SvRV (coro_current);
2111 struct coro *coro = SvSTATE_hv (hv);
2112 SV *data = newRV_inc ((SV *)hv);
2113 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2114
2115 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2116 SvREFCNT_dec (data); /* magicext increases the refcount */
2117
2118 SvREFCNT_dec (coro->rouse_cb);
2119 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2120
2121 return cb;
2122}
2123
2124/*****************************************************************************/
2125/* schedule-like-function opcode (SLF) */
2126
2127static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2128static const CV *slf_cv;
2129static SV **slf_argv;
2130static int slf_argc, slf_arga; /* count, allocated */
2131static I32 slf_ax; /* top of stack, for restore */
2132
2133/* this restores the stack in the case we patched the entersub, to */
2134/* recreate the stack frame as perl will on following calls */
2135/* since entersub cleared the stack */
2136static OP *
2137pp_restore (pTHX)
2138{
2139 int i;
2140 SV **SP = PL_stack_base + slf_ax;
2141
2142 PUSHMARK (SP);
2143
2144 EXTEND (SP, slf_argc + 1);
2145
2146 for (i = 0; i < slf_argc; ++i)
2147 PUSHs (sv_2mortal (slf_argv [i]));
2148
2149 PUSHs ((SV *)CvGV (slf_cv));
2150
2151 RETURNOP (slf_restore.op_first);
2152}
2153
2154static void
2155slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2156{
2157 SV **arg = (SV **)slf_frame.data;
2158
2159 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2160}
2161
2162static void
2163slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2164{
2165 if (items != 2)
2166 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2167
2168 frame->prepare = slf_prepare_transfer;
2169 frame->check = slf_check_nop;
2170 frame->data = (void *)arg; /* let's hope it will stay valid */
2171}
2172
2173static void
2174slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 frame->prepare = prepare_schedule;
2177 frame->check = slf_check_nop;
2178}
2179
2180static void
2181slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2182{
2183 struct coro *next = (struct coro *)slf_frame.data;
2184
2185 SvREFCNT_inc_NN (next->hv);
2186 prepare_schedule_to (aTHX_ ta, next);
2187}
2188
2189static void
2190slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 if (!items)
2193 croak ("Coro::schedule_to expects a coroutine argument, caught");
2194
2195 frame->data = (void *)SvSTATE (arg [0]);
2196 frame->prepare = slf_prepare_schedule_to;
2197 frame->check = slf_check_nop;
2198}
2199
2200static void
2201slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2202{
2203 api_ready (aTHX_ SvRV (coro_current));
2204
2205 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2206}
2207
2208static void
2209slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 frame->prepare = prepare_cede;
2212 frame->check = slf_check_nop;
2213}
2214
2215static void
2216slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2217{
2218 frame->prepare = prepare_cede_notself;
2219 frame->check = slf_check_nop;
2220}
2221
2222/*
2223 * these not obviously related functions are all rolled into one
2224 * function to increase chances that they all will call transfer with the same
2225 * stack offset
2226 * SLF stands for "schedule-like-function".
2227 */
2228static OP *
2229pp_slf (pTHX)
2230{
2231 I32 checkmark; /* mark SP to see how many elements check has pushed */
2232
2233 /* set up the slf frame, unless it has already been set-up */
2234 /* the latter happens when a new coro has been started */
2235 /* or when a new cctx was attached to an existing coroutine */
2236 if (expect_true (!slf_frame.prepare))
2237 {
2238 /* first iteration */
2239 dSP;
2240 SV **arg = PL_stack_base + TOPMARK + 1;
2241 int items = SP - arg; /* args without function object */
2242 SV *gv = *sp;
2243
2244 /* do a quick consistency check on the "function" object, and if it isn't */
2245 /* for us, divert to the real entersub */
2246 if (SvTYPE (gv) != SVt_PVGV
2247 || !GvCV (gv)
2248 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2249 return PL_ppaddr[OP_ENTERSUB](aTHX);
2250
2251 if (!(PL_op->op_flags & OPf_STACKED))
2252 {
2253 /* ampersand-form of call, use @_ instead of stack */
2254 AV *av = GvAV (PL_defgv);
2255 arg = AvARRAY (av);
2256 items = AvFILLp (av) + 1;
2257 }
2258
2259 /* now call the init function, which needs to set up slf_frame */
2260 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2261 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2262
2263 /* pop args */
2264 SP = PL_stack_base + POPMARK;
2265
2266 PUTBACK;
2267 }
2268
2269 /* now that we have a slf_frame, interpret it! */
2270 /* we use a callback system not to make the code needlessly */
2271 /* complicated, but so we can run multiple perl coros from one cctx */
2272
2273 do
2274 {
2275 struct coro_transfer_args ta;
2276
2277 slf_frame.prepare (aTHX_ &ta);
2278 TRANSFER (ta, 0);
2279
2280 checkmark = PL_stack_sp - PL_stack_base;
2281 }
2282 while (slf_frame.check (aTHX_ &slf_frame));
2283
2284 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2285
2286 /* exception handling */
2287 if (expect_false (CORO_THROW))
2288 {
2289 SV *exception = sv_2mortal (CORO_THROW);
2290
2291 CORO_THROW = 0;
2292 sv_setsv (ERRSV, exception);
2293 croak (0);
2294 }
2295
2296 /* return value handling - mostly like entersub */
2297 /* make sure we put something on the stack in scalar context */
2298 if (GIMME_V == G_SCALAR)
2299 {
2300 dSP;
2301 SV **bot = PL_stack_base + checkmark;
2302
2303 if (sp == bot) /* too few, push undef */
2304 bot [1] = &PL_sv_undef;
2305 else if (sp != bot + 1) /* too many, take last one */
2306 bot [1] = *sp;
2307
2308 SP = bot + 1;
2309
2310 PUTBACK;
2311 }
2312
2313 return NORMAL;
2314}
2315
2316static void
2317api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2318{
2319 int i;
2320 SV **arg = PL_stack_base + ax;
2321 int items = PL_stack_sp - arg + 1;
2322
2323 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2324
2325 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2326 && PL_op->op_ppaddr != pp_slf)
2327 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2328
2329 CvFLAGS (cv) |= CVf_SLF;
2330 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2331 slf_cv = cv;
2332
2333 /* we patch the op, and then re-run the whole call */
2334 /* we have to put the same argument on the stack for this to work */
2335 /* and this will be done by pp_restore */
2336 slf_restore.op_next = (OP *)&slf_restore;
2337 slf_restore.op_type = OP_CUSTOM;
2338 slf_restore.op_ppaddr = pp_restore;
2339 slf_restore.op_first = PL_op;
2340
2341 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2342
2343 if (PL_op->op_flags & OPf_STACKED)
2344 {
2345 if (items > slf_arga)
2346 {
2347 slf_arga = items;
2348 free (slf_argv);
2349 slf_argv = malloc (slf_arga * sizeof (SV *));
2350 }
2351
2352 slf_argc = items;
2353
2354 for (i = 0; i < items; ++i)
2355 slf_argv [i] = SvREFCNT_inc (arg [i]);
2356 }
2357 else
2358 slf_argc = 0;
2359
2360 PL_op->op_ppaddr = pp_slf;
2361 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2362
2363 PL_op = (OP *)&slf_restore;
2364}
2365
2366/*****************************************************************************/
2367/* dynamic wind */
2368
2369static void
2370on_enterleave_call (pTHX_ SV *cb)
2371{
2372 dSP;
2373
2374 PUSHSTACK;
2375
2376 PUSHMARK (SP);
2377 PUTBACK;
2378 call_sv (cb, G_VOID | G_DISCARD);
2379 SPAGAIN;
2380
2381 POPSTACK;
2382}
2383
2384static SV *
2385coro_avp_pop_and_free (pTHX_ AV **avp)
2386{
2387 AV *av = *avp;
2388 SV *res = av_pop (av);
2389
2390 if (AvFILLp (av) < 0)
2391 {
2392 *avp = 0;
2393 SvREFCNT_dec (av);
2394 }
2395
2396 return res;
2397}
2398
2399static void
2400coro_pop_on_enter (pTHX_ void *coro)
2401{
2402 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2403 SvREFCNT_dec (cb);
2404}
2405
2406static void
2407coro_pop_on_leave (pTHX_ void *coro)
2408{
2409 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2410 on_enterleave_call (aTHX_ sv_2mortal (cb));
2411}
1658 2412
1659/*****************************************************************************/ 2413/*****************************************************************************/
1660/* PerlIO::cede */ 2414/* PerlIO::cede */
1661 2415
1662typedef struct 2416typedef struct
… …
1690 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2444 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1691 double now = nvtime (); 2445 double now = nvtime ();
1692 2446
1693 if (now >= self->next) 2447 if (now >= self->next)
1694 { 2448 {
1695 api_cede (); 2449 api_cede (aTHX);
1696 self->next = now + self->every; 2450 self->next = now + self->every;
1697 } 2451 }
1698 2452
1699 return PerlIOBuf_flush (aTHX_ f); 2453 return PerlIOBuf_flush (aTHX_ f);
1700} 2454}
… …
1729 PerlIOBuf_get_ptr, 2483 PerlIOBuf_get_ptr,
1730 PerlIOBuf_get_cnt, 2484 PerlIOBuf_get_cnt,
1731 PerlIOBuf_set_ptrcnt, 2485 PerlIOBuf_set_ptrcnt,
1732}; 2486};
1733 2487
2488/*****************************************************************************/
2489/* Coro::Semaphore & Coro::Signal */
2490
2491static SV *
2492coro_waitarray_new (pTHX_ int count)
2493{
2494 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2495 AV *av = newAV ();
2496 SV **ary;
2497
2498 /* unfortunately, building manually saves memory */
2499 Newx (ary, 2, SV *);
2500 AvALLOC (av) = ary;
2501#if PERL_VERSION_ATLEAST (5,10,0)
2502 AvARRAY (av) = ary;
2503#else
2504 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2505 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2506 SvPVX ((SV *)av) = (char *)ary;
2507#endif
2508 AvMAX (av) = 1;
2509 AvFILLp (av) = 0;
2510 ary [0] = newSViv (count);
2511
2512 return newRV_noinc ((SV *)av);
2513}
2514
2515/* semaphore */
2516
2517static void
2518coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2519{
2520 SV *count_sv = AvARRAY (av)[0];
2521 IV count = SvIVX (count_sv);
2522
2523 count += adjust;
2524 SvIVX (count_sv) = count;
2525
2526 /* now wake up as many waiters as are expected to lock */
2527 while (count > 0 && AvFILLp (av) > 0)
2528 {
2529 SV *cb;
2530
2531 /* swap first two elements so we can shift a waiter */
2532 AvARRAY (av)[0] = AvARRAY (av)[1];
2533 AvARRAY (av)[1] = count_sv;
2534 cb = av_shift (av);
2535
2536 if (SvOBJECT (cb))
2537 {
2538 api_ready (aTHX_ cb);
2539 --count;
2540 }
2541 else if (SvTYPE (cb) == SVt_PVCV)
2542 {
2543 dSP;
2544 PUSHMARK (SP);
2545 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2546 PUTBACK;
2547 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2548 }
2549
2550 SvREFCNT_dec (cb);
2551 }
2552}
2553
2554static void
2555coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2556{
2557 /* call $sem->adjust (0) to possibly wake up some other waiters */
2558 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2559}
2560
2561static int
2562slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2563{
2564 AV *av = (AV *)frame->data;
2565 SV *count_sv = AvARRAY (av)[0];
2566
2567 /* if we are about to throw, don't actually acquire the lock, just throw */
2568 if (CORO_THROW)
2569 return 0;
2570 else if (SvIVX (count_sv) > 0)
2571 {
2572 SvSTATE_current->on_destroy = 0;
2573
2574 if (acquire)
2575 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2576 else
2577 coro_semaphore_adjust (aTHX_ av, 0);
2578
2579 return 0;
2580 }
2581 else
2582 {
2583 int i;
2584 /* if we were woken up but can't down, we look through the whole */
2585 /* waiters list and only add us if we aren't in there already */
2586 /* this avoids some degenerate memory usage cases */
2587
2588 for (i = 1; i <= AvFILLp (av); ++i)
2589 if (AvARRAY (av)[i] == SvRV (coro_current))
2590 return 1;
2591
2592 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2593 return 1;
2594 }
2595}
2596
2597static int
2598slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2599{
2600 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2601}
2602
2603static int
2604slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2607}
2608
2609static void
2610slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2611{
2612 AV *av = (AV *)SvRV (arg [0]);
2613
2614 if (SvIVX (AvARRAY (av)[0]) > 0)
2615 {
2616 frame->data = (void *)av;
2617 frame->prepare = prepare_nop;
2618 }
2619 else
2620 {
2621 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2622
2623 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2624 frame->prepare = prepare_schedule;
2625
2626 /* to avoid race conditions when a woken-up coro gets terminated */
2627 /* we arrange for a temporary on_destroy that calls adjust (0) */
2628 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2629 }
2630}
2631
2632static void
2633slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2634{
2635 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2636 frame->check = slf_check_semaphore_down;
2637}
2638
2639static void
2640slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 if (items >= 2)
2643 {
2644 /* callback form */
2645 AV *av = (AV *)SvRV (arg [0]);
2646 SV *cb_cv = s_get_cv_croak (arg [1]);
2647
2648 av_push (av, SvREFCNT_inc_NN (cb_cv));
2649
2650 if (SvIVX (AvARRAY (av)[0]) > 0)
2651 coro_semaphore_adjust (aTHX_ av, 0);
2652
2653 frame->prepare = prepare_nop;
2654 frame->check = slf_check_nop;
2655 }
2656 else
2657 {
2658 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2659 frame->check = slf_check_semaphore_wait;
2660 }
2661}
2662
2663/* signal */
2664
2665static void
2666coro_signal_wake (pTHX_ AV *av, int count)
2667{
2668 SvIVX (AvARRAY (av)[0]) = 0;
2669
2670 /* now signal count waiters */
2671 while (count > 0 && AvFILLp (av) > 0)
2672 {
2673 SV *cb;
2674
2675 /* swap first two elements so we can shift a waiter */
2676 cb = AvARRAY (av)[0];
2677 AvARRAY (av)[0] = AvARRAY (av)[1];
2678 AvARRAY (av)[1] = cb;
2679
2680 cb = av_shift (av);
2681
2682 if (SvTYPE (cb) == SVt_PVCV)
2683 {
2684 dSP;
2685 PUSHMARK (SP);
2686 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2687 PUTBACK;
2688 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2689 }
2690 else
2691 {
2692 api_ready (aTHX_ cb);
2693 sv_setiv (cb, 0); /* signal waiter */
2694 }
2695
2696 SvREFCNT_dec (cb);
2697
2698 --count;
2699 }
2700}
2701
2702static int
2703slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2704{
2705 /* if we are about to throw, also stop waiting */
2706 return SvROK ((SV *)frame->data) && !CORO_THROW;
2707}
2708
2709static void
2710slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2711{
2712 AV *av = (AV *)SvRV (arg [0]);
2713
2714 if (items >= 2)
2715 {
2716 SV *cb_cv = s_get_cv_croak (arg [1]);
2717 av_push (av, SvREFCNT_inc_NN (cb_cv));
2718
2719 if (SvIVX (AvARRAY (av)[0]))
2720 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2721
2722 frame->prepare = prepare_nop;
2723 frame->check = slf_check_nop;
2724 }
2725 else if (SvIVX (AvARRAY (av)[0]))
2726 {
2727 SvIVX (AvARRAY (av)[0]) = 0;
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else
2732 {
2733 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2734
2735 av_push (av, waiter);
2736
2737 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2738 frame->prepare = prepare_schedule;
2739 frame->check = slf_check_signal_wait;
2740 }
2741}
2742
2743/*****************************************************************************/
2744/* Coro::AIO */
2745
2746#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2747
2748/* helper storage struct */
2749struct io_state
2750{
2751 int errorno;
2752 I32 laststype; /* U16 in 5.10.0 */
2753 int laststatval;
2754 Stat_t statcache;
2755};
2756
2757static void
2758coro_aio_callback (pTHX_ CV *cv)
2759{
2760 dXSARGS;
2761 AV *state = (AV *)S_GENSUB_ARG;
2762 SV *coro = av_pop (state);
2763 SV *data_sv = newSV (sizeof (struct io_state));
2764
2765 av_extend (state, items - 1);
2766
2767 sv_upgrade (data_sv, SVt_PV);
2768 SvCUR_set (data_sv, sizeof (struct io_state));
2769 SvPOK_only (data_sv);
2770
2771 {
2772 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2773
2774 data->errorno = errno;
2775 data->laststype = PL_laststype;
2776 data->laststatval = PL_laststatval;
2777 data->statcache = PL_statcache;
2778 }
2779
2780 /* now build the result vector out of all the parameters and the data_sv */
2781 {
2782 int i;
2783
2784 for (i = 0; i < items; ++i)
2785 av_push (state, SvREFCNT_inc_NN (ST (i)));
2786 }
2787
2788 av_push (state, data_sv);
2789
2790 api_ready (aTHX_ coro);
2791 SvREFCNT_dec (coro);
2792 SvREFCNT_dec ((AV *)state);
2793}
2794
2795static int
2796slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2797{
2798 AV *state = (AV *)frame->data;
2799
2800 /* if we are about to throw, return early */
2801 /* this does not cancel the aio request, but at least */
2802 /* it quickly returns */
2803 if (CORO_THROW)
2804 return 0;
2805
2806 /* one element that is an RV? repeat! */
2807 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2808 return 1;
2809
2810 /* restore status */
2811 {
2812 SV *data_sv = av_pop (state);
2813 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2814
2815 errno = data->errorno;
2816 PL_laststype = data->laststype;
2817 PL_laststatval = data->laststatval;
2818 PL_statcache = data->statcache;
2819
2820 SvREFCNT_dec (data_sv);
2821 }
2822
2823 /* push result values */
2824 {
2825 dSP;
2826 int i;
2827
2828 EXTEND (SP, AvFILLp (state) + 1);
2829 for (i = 0; i <= AvFILLp (state); ++i)
2830 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2831
2832 PUTBACK;
2833 }
2834
2835 return 0;
2836}
2837
2838static void
2839slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2840{
2841 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2842 SV *coro_hv = SvRV (coro_current);
2843 struct coro *coro = SvSTATE_hv (coro_hv);
2844
2845 /* put our coroutine id on the state arg */
2846 av_push (state, SvREFCNT_inc_NN (coro_hv));
2847
2848 /* first see whether we have a non-zero priority and set it as AIO prio */
2849 if (coro->prio)
2850 {
2851 dSP;
2852
2853 static SV *prio_cv;
2854 static SV *prio_sv;
2855
2856 if (expect_false (!prio_cv))
2857 {
2858 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2859 prio_sv = newSViv (0);
2860 }
2861
2862 PUSHMARK (SP);
2863 sv_setiv (prio_sv, coro->prio);
2864 XPUSHs (prio_sv);
2865
2866 PUTBACK;
2867 call_sv (prio_cv, G_VOID | G_DISCARD);
2868 }
2869
2870 /* now call the original request */
2871 {
2872 dSP;
2873 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2874 int i;
2875
2876 PUSHMARK (SP);
2877
2878 /* first push all args to the stack */
2879 EXTEND (SP, items + 1);
2880
2881 for (i = 0; i < items; ++i)
2882 PUSHs (arg [i]);
2883
2884 /* now push the callback closure */
2885 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2886
2887 /* now call the AIO function - we assume our request is uncancelable */
2888 PUTBACK;
2889 call_sv ((SV *)req, G_VOID | G_DISCARD);
2890 }
2891
2892 /* now that the requets is going, we loop toll we have a result */
2893 frame->data = (void *)state;
2894 frame->prepare = prepare_schedule;
2895 frame->check = slf_check_aio_req;
2896}
2897
2898static void
2899coro_aio_req_xs (pTHX_ CV *cv)
2900{
2901 dXSARGS;
2902
2903 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2904
2905 XSRETURN_EMPTY;
2906}
2907
2908/*****************************************************************************/
2909
2910#if CORO_CLONE
2911# include "clone.c"
2912#endif
1734 2913
1735MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2914MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1736 2915
1737PROTOTYPES: DISABLE 2916PROTOTYPES: DISABLE
1738 2917
1739BOOT: 2918BOOT:
1740{ 2919{
1741#ifdef USE_ITHREADS 2920#ifdef USE_ITHREADS
1742 MUTEX_INIT (&coro_mutex); 2921# if CORO_PTHREAD
2922 coro_thx = PERL_GET_CONTEXT;
2923# endif
1743#endif 2924#endif
1744 BOOT_PAGESIZE; 2925 BOOT_PAGESIZE;
2926
2927 cctx_current = cctx_new_empty ();
1745 2928
1746 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2929 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1747 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2930 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1748 2931
1749 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2932 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1765 main_top_env = PL_top_env; 2948 main_top_env = PL_top_env;
1766 2949
1767 while (main_top_env->je_prev) 2950 while (main_top_env->je_prev)
1768 main_top_env = main_top_env->je_prev; 2951 main_top_env = main_top_env->je_prev;
1769 2952
2953 {
2954 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2955
2956 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2957 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2958
2959 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2960 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2961 }
2962
1770 coroapi.ver = CORO_API_VERSION; 2963 coroapi.ver = CORO_API_VERSION;
1771 coroapi.rev = CORO_API_REVISION; 2964 coroapi.rev = CORO_API_REVISION;
2965
1772 coroapi.transfer = api_transfer; 2966 coroapi.transfer = api_transfer;
2967
2968 coroapi.sv_state = SvSTATE_;
2969 coroapi.execute_slf = api_execute_slf;
2970 coroapi.prepare_nop = prepare_nop;
2971 coroapi.prepare_schedule = prepare_schedule;
2972 coroapi.prepare_cede = prepare_cede;
2973 coroapi.prepare_cede_notself = prepare_cede_notself;
1773 2974
1774 { 2975 {
1775 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2976 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1776 2977
1777 if (!svp) croak ("Time::HiRes is required"); 2978 if (!svp) croak ("Time::HiRes is required");
1778 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 2979 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1779 2980
1780 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 2981 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2982
2983 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2984 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
1781 } 2985 }
1782 2986
1783 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2987 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1784} 2988}
1785 2989
1786SV * 2990SV *
1787new (char *klass, ...) 2991new (char *klass, ...)
2992 ALIAS:
2993 Coro::new = 1
1788 CODE: 2994 CODE:
1789{ 2995{
1790 struct coro *coro; 2996 struct coro *coro;
1791 MAGIC *mg; 2997 MAGIC *mg;
1792 HV *hv; 2998 HV *hv;
2999 SV *cb;
1793 int i; 3000 int i;
3001
3002 if (items > 1)
3003 {
3004 cb = s_get_cv_croak (ST (1));
3005
3006 if (!ix)
3007 {
3008 if (CvISXSUB (cb))
3009 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3010
3011 if (!CvROOT (cb))
3012 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3013 }
3014 }
1794 3015
1795 Newz (0, coro, 1, struct coro); 3016 Newz (0, coro, 1, struct coro);
1796 coro->args = newAV (); 3017 coro->args = newAV ();
1797 coro->flags = CF_NEW; 3018 coro->flags = CF_NEW;
1798 3019
… …
1803 coro->hv = hv = newHV (); 3024 coro->hv = hv = newHV ();
1804 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 3025 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1805 mg->mg_flags |= MGf_DUP; 3026 mg->mg_flags |= MGf_DUP;
1806 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3027 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1807 3028
3029 if (items > 1)
3030 {
1808 av_extend (coro->args, items - 1); 3031 av_extend (coro->args, items - 1 + ix - 1);
3032
3033 if (ix)
3034 {
3035 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3036 cb = (SV *)cv_coro_run;
3037 }
3038
3039 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3040
1809 for (i = 1; i < items; i++) 3041 for (i = 2; i < items; i++)
1810 av_push (coro->args, newSVsv (ST (i))); 3042 av_push (coro->args, newSVsv (ST (i)));
3043 }
1811} 3044}
1812 OUTPUT: 3045 OUTPUT:
1813 RETVAL 3046 RETVAL
1814 3047
1815# these not obviously related functions are all rolled into the same xs
1816# function to increase chances that they all will call transfer with the same
1817# stack offset
1818void 3048void
1819_set_stacklevel (...) 3049transfer (...)
1820 ALIAS: 3050 PROTOTYPE: $$
1821 Coro::State::transfer = 1 3051 CODE:
1822 Coro::schedule = 2 3052 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1823 Coro::cede = 3
1824 Coro::cede_notself = 4
1825 CODE:
1826{
1827 struct transfer_args ta;
1828
1829 PUTBACK;
1830 switch (ix)
1831 {
1832 case 0:
1833 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1834 ta.next = 0;
1835 break;
1836
1837 case 1:
1838 if (items != 2)
1839 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1840
1841 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1842 break;
1843
1844 case 2:
1845 prepare_schedule (aTHX_ &ta);
1846 break;
1847
1848 case 3:
1849 prepare_cede (aTHX_ &ta);
1850 break;
1851
1852 case 4:
1853 if (!prepare_cede_notself (aTHX_ &ta))
1854 XSRETURN_EMPTY;
1855
1856 break;
1857 }
1858 SPAGAIN;
1859
1860 BARRIER;
1861 PUTBACK;
1862 TRANSFER (ta, 0);
1863 SPAGAIN; /* might be the sp of a different coroutine now */
1864 /* be extra careful not to ever do anything after TRANSFER */
1865}
1866 3053
1867bool 3054bool
1868_destroy (SV *coro_sv) 3055_destroy (SV *coro_sv)
1869 CODE: 3056 CODE:
1870 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3057 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1875_exit (int code) 3062_exit (int code)
1876 PROTOTYPE: $ 3063 PROTOTYPE: $
1877 CODE: 3064 CODE:
1878 _exit (code); 3065 _exit (code);
1879 3066
3067SV *
3068clone (Coro::State coro)
3069 CODE:
3070{
3071#if CORO_CLONE
3072 struct coro *ncoro = coro_clone (aTHX_ coro);
3073 MAGIC *mg;
3074 /* TODO: too much duplication */
3075 ncoro->hv = newHV ();
3076 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3077 mg->mg_flags |= MGf_DUP;
3078 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3079#else
3080 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3081#endif
3082}
3083 OUTPUT:
3084 RETVAL
3085
1880int 3086int
1881cctx_stacksize (int new_stacksize = 0) 3087cctx_stacksize (int new_stacksize = 0)
3088 PROTOTYPE: ;$
1882 CODE: 3089 CODE:
1883 RETVAL = coro_stacksize; 3090 RETVAL = cctx_stacksize;
1884 if (new_stacksize) 3091 if (new_stacksize)
3092 {
1885 coro_stacksize = new_stacksize; 3093 cctx_stacksize = new_stacksize;
3094 ++cctx_gen;
3095 }
1886 OUTPUT: 3096 OUTPUT:
1887 RETVAL 3097 RETVAL
1888 3098
1889int 3099int
3100cctx_max_idle (int max_idle = 0)
3101 PROTOTYPE: ;$
3102 CODE:
3103 RETVAL = cctx_max_idle;
3104 if (max_idle > 1)
3105 cctx_max_idle = max_idle;
3106 OUTPUT:
3107 RETVAL
3108
3109int
1890cctx_count () 3110cctx_count ()
3111 PROTOTYPE:
1891 CODE: 3112 CODE:
1892 RETVAL = cctx_count; 3113 RETVAL = cctx_count;
1893 OUTPUT: 3114 OUTPUT:
1894 RETVAL 3115 RETVAL
1895 3116
1896int 3117int
1897cctx_idle () 3118cctx_idle ()
3119 PROTOTYPE:
1898 CODE: 3120 CODE:
1899 RETVAL = cctx_idle; 3121 RETVAL = cctx_idle;
1900 OUTPUT: 3122 OUTPUT:
1901 RETVAL 3123 RETVAL
1902 3124
1903void 3125void
1904list () 3126list ()
3127 PROTOTYPE:
1905 PPCODE: 3128 PPCODE:
1906{ 3129{
1907 struct coro *coro; 3130 struct coro *coro;
1908 for (coro = coro_first; coro; coro = coro->next) 3131 for (coro = coro_first; coro; coro = coro->next)
1909 if (coro->hv) 3132 if (coro->hv)
… …
1916 eval = 1 3139 eval = 1
1917 CODE: 3140 CODE:
1918{ 3141{
1919 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3142 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1920 { 3143 {
1921 struct coro temp; 3144 struct coro *current = SvSTATE_current;
1922 3145
1923 if (!(coro->flags & CF_RUNNING)) 3146 if (current != coro)
1924 { 3147 {
1925 PUTBACK; 3148 PUTBACK;
1926 save_perl (aTHX_ &temp); 3149 save_perl (aTHX_ current);
1927 load_perl (aTHX_ coro); 3150 load_perl (aTHX_ coro);
3151 SPAGAIN;
1928 } 3152 }
1929 3153
1930 {
1931 dSP;
1932 ENTER;
1933 SAVETMPS;
1934 PUTBACK;
1935 PUSHSTACK; 3154 PUSHSTACK;
3155
1936 PUSHMARK (SP); 3156 PUSHMARK (SP);
3157 PUTBACK;
1937 3158
1938 if (ix) 3159 if (ix)
1939 eval_sv (coderef, 0); 3160 eval_sv (coderef, 0);
1940 else 3161 else
1941 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3162 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1942 3163
1943 POPSTACK; 3164 POPSTACK;
1944 SPAGAIN; 3165 SPAGAIN;
1945 FREETMPS;
1946 LEAVE;
1947 PUTBACK;
1948 }
1949 3166
1950 if (!(coro->flags & CF_RUNNING)) 3167 if (current != coro)
1951 { 3168 {
3169 PUTBACK;
1952 save_perl (aTHX_ coro); 3170 save_perl (aTHX_ coro);
1953 load_perl (aTHX_ &temp); 3171 load_perl (aTHX_ current);
1954 SPAGAIN; 3172 SPAGAIN;
1955 } 3173 }
1956 } 3174 }
1957} 3175}
1958 3176
… …
1962 ALIAS: 3180 ALIAS:
1963 is_ready = CF_READY 3181 is_ready = CF_READY
1964 is_running = CF_RUNNING 3182 is_running = CF_RUNNING
1965 is_new = CF_NEW 3183 is_new = CF_NEW
1966 is_destroyed = CF_DESTROYED 3184 is_destroyed = CF_DESTROYED
3185 is_suspended = CF_SUSPENDED
1967 CODE: 3186 CODE:
1968 RETVAL = boolSV (coro->flags & ix); 3187 RETVAL = boolSV (coro->flags & ix);
1969 OUTPUT: 3188 OUTPUT:
1970 RETVAL 3189 RETVAL
1971 3190
1972void 3191void
3192throw (Coro::State self, SV *throw = &PL_sv_undef)
3193 PROTOTYPE: $;$
3194 CODE:
3195{
3196 struct coro *current = SvSTATE_current;
3197 SV **throwp = self == current ? &CORO_THROW : &self->except;
3198 SvREFCNT_dec (*throwp);
3199 SvGETMAGIC (throw);
3200 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3201}
3202
3203void
1973api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3204api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3205 PROTOTYPE: $;$
3206 C_ARGS: aTHX_ coro, flags
1974 3207
1975SV * 3208SV *
1976has_cctx (Coro::State coro) 3209has_cctx (Coro::State coro)
1977 PROTOTYPE: $ 3210 PROTOTYPE: $
1978 CODE: 3211 CODE:
1979 RETVAL = boolSV (!!coro->cctx); 3212 /* maybe manage the running flag differently */
3213 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1980 OUTPUT: 3214 OUTPUT:
1981 RETVAL 3215 RETVAL
1982 3216
1983int 3217int
1984is_traced (Coro::State coro) 3218is_traced (Coro::State coro)
… …
1986 CODE: 3220 CODE:
1987 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3221 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1988 OUTPUT: 3222 OUTPUT:
1989 RETVAL 3223 RETVAL
1990 3224
1991IV 3225UV
1992rss (Coro::State coro) 3226rss (Coro::State coro)
1993 PROTOTYPE: $ 3227 PROTOTYPE: $
1994 ALIAS: 3228 ALIAS:
1995 usecount = 1 3229 usecount = 1
1996 CODE: 3230 CODE:
… …
2002 OUTPUT: 3236 OUTPUT:
2003 RETVAL 3237 RETVAL
2004 3238
2005void 3239void
2006force_cctx () 3240force_cctx ()
3241 PROTOTYPE:
2007 CODE: 3242 CODE:
2008 struct coro *coro = SvSTATE (coro_current);
2009 coro->cctx->idle_sp = 0; 3243 cctx_current->idle_sp = 0;
2010
2011void
2012throw (Coro::State self, SV *throw = &PL_sv_undef)
2013 PROTOTYPE: $;$
2014 CODE:
2015 SvREFCNT_dec (self->throw);
2016 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2017 3244
2018void 3245void
2019swap_defsv (Coro::State self) 3246swap_defsv (Coro::State self)
2020 PROTOTYPE: $ 3247 PROTOTYPE: $
2021 ALIAS: 3248 ALIAS:
2022 swap_defav = 1 3249 swap_defav = 1
2023 CODE: 3250 CODE:
2024 if (!self->slot) 3251 if (!self->slot)
2025 croak ("cannot swap state with coroutine that has no saved state"); 3252 croak ("cannot swap state with coroutine that has no saved state,");
2026 else 3253 else
2027 { 3254 {
2028 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3255 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2029 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3256 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2030 3257
2031 SV *tmp = *src; *src = *dst; *dst = tmp; 3258 SV *tmp = *src; *src = *dst; *dst = tmp;
2032 } 3259 }
2033 3260
3261void
3262cancel (Coro::State self)
3263 CODE:
3264 coro_state_destroy (aTHX_ self);
3265 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3266
3267
3268SV *
3269enable_times (int enabled = enable_times)
3270 CODE:
3271{
3272 RETVAL = boolSV (enable_times);
3273
3274 if (enabled != enable_times)
3275 {
3276 enable_times = enabled;
3277
3278 coro_times_update ();
3279 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3280 }
3281}
3282 OUTPUT:
3283 RETVAL
3284
3285void
3286times (Coro::State self)
3287 PPCODE:
3288{
3289 struct coro *current = SvSTATE (coro_current);
3290
3291 if (expect_false (current == self))
3292 {
3293 coro_times_update ();
3294 coro_times_add (SvSTATE (coro_current));
3295 }
3296
3297 EXTEND (SP, 2);
3298 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3299 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3300
3301 if (expect_false (current == self))
3302 coro_times_sub (SvSTATE (coro_current));
3303}
3304
2034MODULE = Coro::State PACKAGE = Coro 3305MODULE = Coro::State PACKAGE = Coro
2035 3306
2036BOOT: 3307BOOT:
2037{ 3308{
2038 int i;
2039
2040 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2041 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3309 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2042 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3310 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2043 3311 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3312 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2044 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3313 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2045 SvREADONLY_on (coro_current); 3314 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3315 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3316 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3317 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3318
3319 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3320 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3321 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3322 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
2046 3323
2047 coro_stash = gv_stashpv ("Coro", TRUE); 3324 coro_stash = gv_stashpv ("Coro", TRUE);
2048 3325
2049 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3326 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2050 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3327 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2051 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3328 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2052 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3329 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2053 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3330 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2054 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3331 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2055
2056 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2057 coro_ready[i] = newAV ();
2058 3332
2059 { 3333 {
2060 SV *sv = perl_get_sv ("Coro::API", TRUE); 3334 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2061 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2062 3335
2063 coroapi.schedule = api_schedule; 3336 coroapi.schedule = api_schedule;
3337 coroapi.schedule_to = api_schedule_to;
2064 coroapi.cede = api_cede; 3338 coroapi.cede = api_cede;
2065 coroapi.cede_notself = api_cede_notself; 3339 coroapi.cede_notself = api_cede_notself;
2066 coroapi.ready = api_ready; 3340 coroapi.ready = api_ready;
2067 coroapi.is_ready = api_is_ready; 3341 coroapi.is_ready = api_is_ready;
2068 coroapi.nready = &coro_nready; 3342 coroapi.nready = coro_nready;
2069 coroapi.current = coro_current; 3343 coroapi.current = coro_current;
2070 3344
2071 GCoroAPI = &coroapi; 3345 /*GCoroAPI = &coroapi;*/
2072 sv_setiv (sv, (IV)&coroapi); 3346 sv_setiv (sv, (IV)&coroapi);
2073 SvREADONLY_on (sv); 3347 SvREADONLY_on (sv);
2074 } 3348 }
2075} 3349}
3350
3351void
3352terminate (...)
3353 CODE:
3354 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3355
3356void
3357schedule (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3360
3361void
3362schedule_to (...)
3363 CODE:
3364 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3365
3366void
3367cede_to (...)
3368 CODE:
3369 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3370
3371void
3372cede (...)
3373 CODE:
3374 CORO_EXECUTE_SLF_XS (slf_init_cede);
3375
3376void
3377cede_notself (...)
3378 CODE:
3379 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2076 3380
2077void 3381void
2078_set_current (SV *current) 3382_set_current (SV *current)
2079 PROTOTYPE: $ 3383 PROTOTYPE: $
2080 CODE: 3384 CODE:
… …
2083 3387
2084void 3388void
2085_set_readyhook (SV *hook) 3389_set_readyhook (SV *hook)
2086 PROTOTYPE: $ 3390 PROTOTYPE: $
2087 CODE: 3391 CODE:
2088 LOCK;
2089 SvREFCNT_dec (coro_readyhook); 3392 SvREFCNT_dec (coro_readyhook);
3393 SvGETMAGIC (hook);
3394 if (SvOK (hook))
3395 {
2090 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3396 coro_readyhook = newSVsv (hook);
2091 UNLOCK; 3397 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3398 }
3399 else
3400 {
3401 coro_readyhook = 0;
3402 CORO_READYHOOK = 0;
3403 }
2092 3404
2093int 3405int
2094prio (Coro::State coro, int newprio = 0) 3406prio (Coro::State coro, int newprio = 0)
3407 PROTOTYPE: $;$
2095 ALIAS: 3408 ALIAS:
2096 nice = 1 3409 nice = 1
2097 CODE: 3410 CODE:
2098{ 3411{
2099 RETVAL = coro->prio; 3412 RETVAL = coro->prio;
… …
2101 if (items > 1) 3414 if (items > 1)
2102 { 3415 {
2103 if (ix) 3416 if (ix)
2104 newprio = coro->prio - newprio; 3417 newprio = coro->prio - newprio;
2105 3418
2106 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3419 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2107 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3420 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2108 3421
2109 coro->prio = newprio; 3422 coro->prio = newprio;
2110 } 3423 }
2111} 3424}
2112 OUTPUT: 3425 OUTPUT:
… …
2114 3427
2115SV * 3428SV *
2116ready (SV *self) 3429ready (SV *self)
2117 PROTOTYPE: $ 3430 PROTOTYPE: $
2118 CODE: 3431 CODE:
2119 RETVAL = boolSV (api_ready (self)); 3432 RETVAL = boolSV (api_ready (aTHX_ self));
2120 OUTPUT: 3433 OUTPUT:
2121 RETVAL 3434 RETVAL
2122 3435
2123int 3436int
2124nready (...) 3437nready (...)
… …
2126 CODE: 3439 CODE:
2127 RETVAL = coro_nready; 3440 RETVAL = coro_nready;
2128 OUTPUT: 3441 OUTPUT:
2129 RETVAL 3442 RETVAL
2130 3443
2131# for async_pool speedup
2132void 3444void
2133_pool_1 (SV *cb) 3445suspend (Coro::State self)
3446 PROTOTYPE: $
2134 CODE: 3447 CODE:
2135{ 3448 self->flags |= CF_SUSPENDED;
2136 struct coro *coro = SvSTATE (coro_current);
2137 HV *hv = (HV *)SvRV (coro_current);
2138 AV *defav = GvAV (PL_defgv);
2139 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2140 AV *invoke_av;
2141 int i, len;
2142 3449
2143 if (!invoke) 3450void
3451resume (Coro::State self)
3452 PROTOTYPE: $
3453 CODE:
3454 self->flags &= ~CF_SUSPENDED;
3455
3456void
3457_pool_handler (...)
3458 CODE:
3459 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3460
3461void
3462async_pool (SV *cv, ...)
3463 PROTOTYPE: &@
3464 PPCODE:
3465{
3466 HV *hv = (HV *)av_pop (av_async_pool);
3467 AV *av = newAV ();
3468 SV *cb = ST (0);
3469 int i;
3470
3471 av_extend (av, items - 2);
3472 for (i = 1; i < items; ++i)
3473 av_push (av, SvREFCNT_inc_NN (ST (i)));
3474
3475 if ((SV *)hv == &PL_sv_undef)
2144 { 3476 {
2145 SV *old = PL_diehook; 3477 PUSHMARK (SP);
2146 PL_diehook = 0; 3478 EXTEND (SP, 2);
2147 SvREFCNT_dec (old); 3479 PUSHs (sv_Coro);
2148 croak ("\3async_pool terminate\2\n"); 3480 PUSHs ((SV *)cv_pool_handler);
3481 PUTBACK;
3482 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3483 SPAGAIN;
3484
3485 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
2149 } 3486 }
2150 3487
2151 SvREFCNT_dec (coro->saved_deffh);
2152 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2153
2154 hv_store (hv, "desc", sizeof ("desc") - 1,
2155 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2156
2157 invoke_av = (AV *)SvRV (invoke);
2158 len = av_len (invoke_av);
2159
2160 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2161
2162 if (len > 0)
2163 { 3488 {
2164 av_fill (defav, len - 1); 3489 struct coro *coro = SvSTATE_hv (hv);
2165 for (i = 0; i < len; ++i) 3490
2166 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3491 assert (!coro->invoke_cb);
3492 assert (!coro->invoke_av);
3493 coro->invoke_cb = SvREFCNT_inc (cb);
3494 coro->invoke_av = av;
2167 } 3495 }
2168 3496
3497 api_ready (aTHX_ (SV *)hv);
3498
3499 if (GIMME_V != G_VOID)
3500 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3501 else
2169 SvREFCNT_dec (invoke); 3502 SvREFCNT_dec (hv);
2170} 3503}
2171 3504
2172void 3505SV *
2173_pool_2 (SV *cb) 3506rouse_cb ()
3507 PROTOTYPE:
2174 CODE: 3508 CODE:
2175{ 3509 RETVAL = coro_new_rouse_cb (aTHX);
2176 struct coro *coro = SvSTATE (coro_current);
2177
2178 sv_setsv (cb, &PL_sv_undef);
2179
2180 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2181 coro->saved_deffh = 0;
2182
2183 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2184 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2185 {
2186 SV *old = PL_diehook;
2187 PL_diehook = 0;
2188 SvREFCNT_dec (old);
2189 croak ("\3async_pool terminate\2\n");
2190 }
2191
2192 av_clear (GvAV (PL_defgv));
2193 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2194 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2195
2196 coro->prio = 0;
2197
2198 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2199 api_trace (coro_current, 0);
2200
2201 av_push (av_async_pool, newSVsv (coro_current));
2202}
2203
2204#if 0
2205
2206void
2207_generator_call (...)
2208 PROTOTYPE: @
2209 PPCODE:
2210 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2211 xxxx
2212 abort ();
2213
2214SV *
2215gensub (SV *sub, ...)
2216 PROTOTYPE: &;@
2217 CODE:
2218{
2219 struct coro *coro;
2220 MAGIC *mg;
2221 CV *xcv;
2222 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2223 int i;
2224
2225 CvGV (ncv) = CvGV (cv);
2226 CvFILE (ncv) = CvFILE (cv);
2227
2228 Newz (0, coro, 1, struct coro);
2229 coro->args = newAV ();
2230 coro->flags = CF_NEW;
2231
2232 av_extend (coro->args, items - 1);
2233 for (i = 1; i < items; i++)
2234 av_push (coro->args, newSVsv (ST (i)));
2235
2236 CvISXSUB_on (ncv);
2237 CvXSUBANY (ncv).any_ptr = (void *)coro;
2238
2239 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2240
2241 CvXSUB (ncv) = CvXSUB (xcv);
2242 CvANON_on (ncv);
2243
2244 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2245 RETVAL = newRV_noinc ((SV *)ncv);
2246}
2247 OUTPUT: 3510 OUTPUT:
2248 RETVAL 3511 RETVAL
2249 3512
2250#endif
2251
2252
2253MODULE = Coro::State PACKAGE = Coro::AIO
2254
2255void 3513void
2256_get_state (SV *self) 3514rouse_wait (...)
3515 PROTOTYPE: ;$
2257 PPCODE: 3516 PPCODE:
2258{ 3517 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2259 AV *defav = GvAV (PL_defgv);
2260 AV *av = newAV ();
2261 int i;
2262 SV *data_sv = newSV (sizeof (struct io_state));
2263 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2264 SvCUR_set (data_sv, sizeof (struct io_state));
2265 SvPOK_only (data_sv);
2266
2267 data->errorno = errno;
2268 data->laststype = PL_laststype;
2269 data->laststatval = PL_laststatval;
2270 data->statcache = PL_statcache;
2271
2272 av_extend (av, AvFILLp (defav) + 1 + 1);
2273
2274 for (i = 0; i <= AvFILLp (defav); ++i)
2275 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2276
2277 av_push (av, data_sv);
2278
2279 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2280
2281 api_ready (self);
2282}
2283 3518
2284void 3519void
2285_set_state (SV *state) 3520on_enter (SV *block)
3521 ALIAS:
3522 on_leave = 1
2286 PROTOTYPE: $ 3523 PROTOTYPE: &
3524 CODE:
3525{
3526 struct coro *coro = SvSTATE_current;
3527 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3528
3529 block = s_get_cv_croak (block);
3530
3531 if (!*avp)
3532 *avp = newAV ();
3533
3534 av_push (*avp, SvREFCNT_inc (block));
3535
3536 if (!ix)
3537 on_enterleave_call (aTHX_ block);
3538
3539 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3540 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3541 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3542}
3543
3544
3545MODULE = Coro::State PACKAGE = PerlIO::cede
3546
3547BOOT:
3548 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3549
3550
3551MODULE = Coro::State PACKAGE = Coro::Semaphore
3552
3553SV *
3554new (SV *klass, SV *count = 0)
3555 CODE:
3556{
3557 int semcnt = 1;
3558
3559 if (count)
3560 {
3561 SvGETMAGIC (count);
3562
3563 if (SvOK (count))
3564 semcnt = SvIV (count);
3565 }
3566
3567 RETVAL = sv_bless (
3568 coro_waitarray_new (aTHX_ semcnt),
3569 GvSTASH (CvGV (cv))
3570 );
3571}
3572 OUTPUT:
3573 RETVAL
3574
3575# helper for Coro::Channel and others
3576SV *
3577_alloc (int count)
3578 CODE:
3579 RETVAL = coro_waitarray_new (aTHX_ count);
3580 OUTPUT:
3581 RETVAL
3582
3583SV *
3584count (SV *self)
3585 CODE:
3586 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3587 OUTPUT:
3588 RETVAL
3589
3590void
3591up (SV *self, int adjust = 1)
3592 ALIAS:
3593 adjust = 1
3594 CODE:
3595 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3596
3597void
3598down (...)
3599 CODE:
3600 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3601
3602void
3603wait (...)
3604 CODE:
3605 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3606
3607void
3608try (SV *self)
3609 PPCODE:
3610{
3611 AV *av = (AV *)SvRV (self);
3612 SV *count_sv = AvARRAY (av)[0];
3613 IV count = SvIVX (count_sv);
3614
3615 if (count > 0)
3616 {
3617 --count;
3618 SvIVX (count_sv) = count;
3619 XSRETURN_YES;
3620 }
3621 else
3622 XSRETURN_NO;
3623}
3624
3625void
3626waiters (SV *self)
3627 PPCODE:
3628{
3629 AV *av = (AV *)SvRV (self);
3630 int wcount = AvFILLp (av) + 1 - 1;
3631
3632 if (GIMME_V == G_SCALAR)
3633 XPUSHs (sv_2mortal (newSViv (wcount)));
3634 else
3635 {
3636 int i;
3637 EXTEND (SP, wcount);
3638 for (i = 1; i <= wcount; ++i)
3639 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3640 }
3641}
3642
3643MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3644
3645void
3646_may_delete (SV *sem, int count, int extra_refs)
2287 PPCODE: 3647 PPCODE:
2288{ 3648{
2289 AV *av = (AV *)SvRV (state); 3649 AV *av = (AV *)SvRV (sem);
2290 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2291 int i;
2292 3650
2293 errno = data->errorno; 3651 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2294 PL_laststype = data->laststype; 3652 && AvFILLp (av) == 0 /* no waiters, just count */
2295 PL_laststatval = data->laststatval; 3653 && SvIV (AvARRAY (av)[0]) == count)
2296 PL_statcache = data->statcache; 3654 XSRETURN_YES;
2297 3655
3656 XSRETURN_NO;
3657}
3658
3659MODULE = Coro::State PACKAGE = Coro::Signal
3660
3661SV *
3662new (SV *klass)
3663 CODE:
3664 RETVAL = sv_bless (
3665 coro_waitarray_new (aTHX_ 0),
3666 GvSTASH (CvGV (cv))
3667 );
3668 OUTPUT:
3669 RETVAL
3670
3671void
3672wait (...)
3673 CODE:
3674 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3675
3676void
3677broadcast (SV *self)
3678 CODE:
3679{
3680 AV *av = (AV *)SvRV (self);
3681 coro_signal_wake (aTHX_ av, AvFILLp (av));
3682}
3683
3684void
3685send (SV *self)
3686 CODE:
3687{
3688 AV *av = (AV *)SvRV (self);
3689
2298 EXTEND (SP, AvFILLp (av)); 3690 if (AvFILLp (av))
2299 for (i = 0; i < AvFILLp (av); ++i) 3691 coro_signal_wake (aTHX_ av, 1);
2300 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3692 else
3693 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2301} 3694}
3695
3696IV
3697awaited (SV *self)
3698 CODE:
3699 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3700 OUTPUT:
3701 RETVAL
2302 3702
2303 3703
2304MODULE = Coro::State PACKAGE = Coro::AnyEvent 3704MODULE = Coro::State PACKAGE = Coro::AnyEvent
2305 3705
2306BOOT: 3706BOOT:
2307 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3707 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2308 3708
2309SV * 3709void
2310_schedule (...) 3710_schedule (...)
2311 PROTOTYPE: @
2312 CODE: 3711 CODE:
2313{ 3712{
2314 static int incede; 3713 static int incede;
2315 3714
2316 api_cede_notself (); 3715 api_cede_notself (aTHX);
2317 3716
2318 ++incede; 3717 ++incede;
2319 while (coro_nready >= incede && api_cede ()) 3718 while (coro_nready >= incede && api_cede (aTHX))
2320 ; 3719 ;
2321 3720
2322 sv_setsv (sv_activity, &PL_sv_undef); 3721 sv_setsv (sv_activity, &PL_sv_undef);
2323 if (coro_nready >= incede) 3722 if (coro_nready >= incede)
2324 { 3723 {
2325 PUSHMARK (SP); 3724 PUSHMARK (SP);
2326 PUTBACK; 3725 PUTBACK;
2327 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3726 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2328 SPAGAIN;
2329 } 3727 }
2330 3728
2331 --incede; 3729 --incede;
2332} 3730}
2333 3731
2334 3732
2335MODULE = Coro::State PACKAGE = PerlIO::cede 3733MODULE = Coro::State PACKAGE = Coro::AIO
2336 3734
2337BOOT: 3735void
2338 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3736_register (char *target, char *proto, SV *req)
3737 CODE:
3738{
3739 SV *req_cv = s_get_cv_croak (req);
3740 /* newXSproto doesn't return the CV on 5.8 */
3741 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3742 sv_setpv ((SV *)slf_cv, proto);
3743 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3744}
3745
3746MODULE = Coro::State PACKAGE = Coro::Select
3747
3748void
3749patch_pp_sselect ()
3750 CODE:
3751 if (!coro_old_pp_sselect)
3752 {
3753 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3754 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3755 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3756 }
3757
3758void
3759unpatch_pp_sselect ()
3760 CODE:
3761 if (coro_old_pp_sselect)
3762 {
3763 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3764 coro_old_pp_sselect = 0;
3765 }
3766
3767

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