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Comparing Coro/Coro/State.xs (file contents):
Revision 1.176 by root, Sun Sep 30 13:50:38 2007 UTC vs.
Revision 1.414 by root, Wed Jun 29 16:08:31 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
10 18
19#include <stddef.h>
11#include <stdio.h> 20#include <stdio.h>
12#include <errno.h> 21#include <errno.h>
13#include <assert.h> 22#include <assert.h>
14 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
37
15#ifdef HAVE_MMAP 38#if HAVE_MMAP
16# include <unistd.h> 39# include <unistd.h>
17# include <sys/mman.h> 40# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON 42# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
35# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
36#endif 59#endif
37 60
38#if CORO_USE_VALGRIND 61#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 63#endif
44 64
45/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
47 67
48#define PERL_VERSION_ATLEAST(a,b,c) \ 68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 69# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 70#endif
79 71
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 73# undef CORO_STACKGUARD
82#endif 74#endif
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 82# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 83#endif
92 84
93/* The next macros try to return the current stack pointer, in an as 85/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 86 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3 87#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 88# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 89# define STACKLEVEL __builtin_frame_address (0)
103#else 90#else
104# define attribute(x) 91# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 92# define STACKLEVEL ((void *)&stacklevel)
106#endif 93#endif
107 94
108#define NOINLINE attribute ((noinline)) 95#define IN_DESTRUCT PL_dirty
109 96
110#include "CoroAPI.h" 97#include "CoroAPI.h"
98#define GCoroAPI (&coroapi) /* very sneaky */
111 99
112#ifdef USE_ITHREADS 100#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 101# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 102static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 103# endif
104#endif
120 105
121/* helper storage struct for Coro::AIO */ 106/* used in state.h */
122struct io_state 107#define VAR(name,type) VARx(name, PL_ ## name, type)
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129 108
109#ifdef __linux
110# include <time.h> /* for timespec */
111# include <syscall.h> /* for SYS_* */
112# ifdef SYS_clock_gettime
113# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
114# define CORO_CLOCK_MONOTONIC 1
115# define CORO_CLOCK_THREAD_CPUTIME_ID 3
116# endif
117#endif
118
119static double (*nvtime)(); /* so why doesn't it take void? */
120static void (*u2time)(pTHX_ UV ret[2]);
121
122/* we hijack an hopefully unused CV flag for our purposes */
123#define CVf_SLF 0x4000
124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
126
127static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 128static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 131static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 132static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
134
135static AV *av_destroy; /* destruction queue */
136static SV *sv_manager; /* the manager coro */
137static SV *sv_idle; /* $Coro::idle */
138
139static GV *irsgv; /* $/ */
140static GV *stdoutgv; /* *STDOUT */
141static SV *rv_diehook;
142static SV *rv_warnhook;
143static HV *hv_sig; /* %SIG */
136 144
137/* async_pool helper stuff */ 145/* async_pool helper stuff */
138static SV *sv_pool_rss; 146static SV *sv_pool_rss;
139static SV *sv_pool_size; 147static SV *sv_pool_size;
148static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 149static AV *av_async_pool; /* idle pool */
150static SV *sv_Coro; /* class string */
151static CV *cv_pool_handler;
152
153/* Coro::AnyEvent */
154static SV *sv_activity;
155
156/* enable processtime/realtime profiling */
157static char enable_times;
158typedef U32 coro_ts[2];
159static coro_ts time_real, time_cpu;
160static char times_valid;
141 161
142static struct coro_cctx *cctx_first; 162static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 163static int cctx_count, cctx_idle;
144 164
145enum { 165enum
166{
146 CC_MAPPED = 0x01, 167 CC_MAPPED = 0x01,
147 CC_NOREUSE = 0x02, /* throw this away after tracing */ 168 CC_NOREUSE = 0x02, /* throw this away after tracing */
148 CC_TRACE = 0x04, 169 CC_TRACE = 0x04,
149 CC_TRACE_SUB = 0x08, /* trace sub calls */ 170 CC_TRACE_SUB = 0x08, /* trace sub calls */
150 CC_TRACE_LINE = 0x10, /* trace each statement */ 171 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152}; 173};
153 174
154/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
155typedef struct coro_cctx { 176typedef struct coro_cctx
177{
156 struct coro_cctx *next; 178 struct coro_cctx *next;
157 179
158 /* the stack */ 180 /* the stack */
159 void *sptr; 181 void *sptr;
160 size_t ssize; 182 size_t ssize;
… …
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
165 JMPENV *top_env; 187 JMPENV *top_env;
166 coro_context cctx; 188 coro_context cctx;
167 189
190 U32 gen;
168#if CORO_USE_VALGRIND 191#if CORO_USE_VALGRIND
169 int valgrind_id; 192 int valgrind_id;
170#endif 193#endif
171 unsigned char flags; 194 unsigned char flags;
172} coro_cctx; 195} coro_cctx;
173 196
197static coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201static MGVTBL coro_state_vtbl;
202
174enum { 203enum
204{
175 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
176 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 208 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
179}; 211};
180 212
213/* the structure where most of the perl state is stored, overlaid on the cxstack */
214typedef struct
215{
216#define VARx(name,expr,type) type name;
217# include "state.h"
218#undef VARx
219} perl_slots;
220
221/* how many context stack entries do we need for perl_slots */
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
223
181/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
182struct coro { 225struct coro
226{
183 /* the c coroutine allocated to this perl coroutine, if any */ 227 /* the C coroutine allocated to this perl coroutine, if any */
184 coro_cctx *cctx; 228 coro_cctx *cctx;
185 229
230 /* ready queue */
231 struct coro *next_ready;
232
233 /* state data */
234 struct CoroSLF slf_frame; /* saved slf frame */
235 AV *mainstack;
236 perl_slots *slot; /* basically the saved sp */
237
238 CV *startcv; /* the CV to execute */
186 /* data associated with this coroutine (initial args) */ 239 AV *args; /* data associated with this coroutine (initial args) */
187 AV *args;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */ 240 int flags; /* CF_ flags */
191 241 HV *hv; /* the perl hash associated with this coro, if any */
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name;
201# include "state.h"
202#undef VAR
203 242
204 /* statistics */ 243 /* statistics */
205 int usecount; /* number of switches to this coro */ 244 int usecount; /* number of transfers to this coro */
206 245
207 /* coro process data */ 246 /* coro process data */
208 int prio; 247 int prio;
248 SV *except; /* exception to be thrown */
249 SV *rouse_cb; /* last rouse callback */
250 AV *on_destroy; /* callbacks or coros to notify on destroy */
251 AV *status; /* the exit status list */
252
253 /* async_pool */
254 SV *saved_deffh;
255 SV *invoke_cb;
256 AV *invoke_av;
257
258 /* on_enter/on_leave */
259 AV *on_enter;
260 AV *on_leave;
261
262 /* swap_sv */
263 AV *swap_sv;
264
265 /* times */
266 coro_ts t_cpu, t_real;
209 267
210 /* linked list */ 268 /* linked list */
211 struct coro *next, *prev; 269 struct coro *next, *prev;
212 HV *hv; /* the perl hash associated with this coro, if any */
213}; 270};
214 271
215typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
216typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
217 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the main reason we don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
218/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
219 281
220#define PRIO_MAX 3 282#define CORO_PRIO_MAX 3
221#define PRIO_HIGH 1 283#define CORO_PRIO_HIGH 1
222#define PRIO_NORMAL 0 284#define CORO_PRIO_NORMAL 0
223#define PRIO_LOW -1 285#define CORO_PRIO_LOW -1
224#define PRIO_IDLE -3 286#define CORO_PRIO_IDLE -3
225#define PRIO_MIN -4 287#define CORO_PRIO_MIN -4
226 288
227/* for Coro.pm */ 289/* for Coro.pm */
228static SV *coro_current; 290static SV *coro_current;
229static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static SV *coro_readyhook;
230static int coro_nready; 292static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
293static CV *cv_coro_run;
231static struct coro *coro_first; 294static struct coro *coro_first;
295#define coro_nready coroapi.nready
296
297/** JIT *********************************************************************/
298
299#if CORO_JIT
300 /* APPLE doesn't have HAVE_MMAP though */
301 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
302 #ifndef CORO_JIT_TYPE
303 #if __x86_64 && CORO_JIT_UNIXY
304 #define CORO_JIT_TYPE "amd64-unix"
305 #elif __i386 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "x86-unix"
307 #endif
308 #endif
309#endif
310
311#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
312 #undef CORO_JIT
313#endif
314
315#if CORO_JIT
316 typedef void (*load_save_perl_slots_type)(perl_slots *);
317 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
318#endif
319
320/** Coro::Select ************************************************************/
321
322static OP *(*coro_old_pp_sselect) (pTHX);
323static SV *coro_select_select;
324
325/* horrible hack, but if it works... */
326static OP *
327coro_pp_sselect (pTHX)
328{
329 dSP;
330 PUSHMARK (SP - 4); /* fake argument list */
331 XPUSHs (coro_select_select);
332 PUTBACK;
333
334 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
335 PL_op->op_flags |= OPf_STACKED;
336 PL_op->op_private = 0;
337 return PL_ppaddr [OP_ENTERSUB](aTHX);
338}
339
340/** time stuff **************************************************************/
341
342#ifdef HAS_GETTIMEOFDAY
343
344ecb_inline void
345coro_u2time (pTHX_ UV ret[2])
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 ret [0] = tv.tv_sec;
351 ret [1] = tv.tv_usec;
352}
353
354ecb_inline double
355coro_nvtime (void)
356{
357 struct timeval tv;
358 gettimeofday (&tv, 0);
359
360 return tv.tv_sec + tv.tv_usec * 1e-6;
361}
362
363ecb_inline void
364time_init (pTHX)
365{
366 nvtime = coro_nvtime;
367 u2time = coro_u2time;
368}
369
370#else
371
372ecb_inline void
373time_init (pTHX)
374{
375 SV **svp;
376
377 require_pv ("Time/HiRes.pm");
378
379 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
380
381 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
382 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
383
384 nvtime = INT2PTR (double (*)(), SvIV (*svp));
385
386 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
387 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
388}
389
390#endif
232 391
233/** lowlevel stuff **********************************************************/ 392/** lowlevel stuff **********************************************************/
234 393
235static AV * 394static SV * ecb_noinline
395coro_get_sv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_sv (name, create);
400#endif
401 return get_sv (name, create);
402}
403
404static AV * ecb_noinline
405coro_get_av (pTHX_ const char *name, int create)
406{
407#if PERL_VERSION_ATLEAST (5,10,0)
408 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
409 get_av (name, create);
410#endif
411 return get_av (name, create);
412}
413
414static HV * ecb_noinline
415coro_get_hv (pTHX_ const char *name, int create)
416{
417#if PERL_VERSION_ATLEAST (5,10,0)
418 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
419 get_hv (name, create);
420#endif
421 return get_hv (name, create);
422}
423
424ecb_inline void
425coro_times_update (void)
426{
427#ifdef coro_clock_gettime
428 struct timespec ts;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
432 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
433
434 ts.tv_sec = ts.tv_nsec = 0;
435 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
436 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
437#else
438 dTHX;
439 UV tv[2];
440
441 u2time (aTHX_ tv);
442 time_real [0] = tv [0];
443 time_real [1] = tv [1] * 1000;
444#endif
445}
446
447ecb_inline void
448coro_times_add (struct coro *c)
449{
450 c->t_real [1] += time_real [1];
451 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
452 c->t_real [0] += time_real [0];
453
454 c->t_cpu [1] += time_cpu [1];
455 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
456 c->t_cpu [0] += time_cpu [0];
457}
458
459ecb_inline void
460coro_times_sub (struct coro *c)
461{
462 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
463 c->t_real [1] -= time_real [1];
464 c->t_real [0] -= time_real [0];
465
466 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
467 c->t_cpu [1] -= time_cpu [1];
468 c->t_cpu [0] -= time_cpu [0];
469}
470
471/*****************************************************************************/
472/* magic glue */
473
474#define CORO_MAGIC_type_cv 26
475#define CORO_MAGIC_type_state PERL_MAGIC_ext
476
477#define CORO_MAGIC_NN(sv, type) \
478 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
479 ? SvMAGIC (sv) \
480 : mg_find (sv, type))
481
482#define CORO_MAGIC(sv, type) \
483 (ecb_expect_true (SvMAGIC (sv)) \
484 ? CORO_MAGIC_NN (sv, type) \
485 : 0)
486
487#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
488#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
489
490ecb_inline MAGIC *
491SvSTATEhv_p (pTHX_ SV *coro)
492{
493 MAGIC *mg;
494
495 if (ecb_expect_true (
496 SvTYPE (coro) == SVt_PVHV
497 && (mg = CORO_MAGIC_state (coro))
498 && mg->mg_virtual == &coro_state_vtbl
499 ))
500 return mg;
501
502 return 0;
503}
504
505ecb_inline struct coro *
506SvSTATE_ (pTHX_ SV *coro)
507{
508 MAGIC *mg;
509
510 if (SvROK (coro))
511 coro = SvRV (coro);
512
513 mg = SvSTATEhv_p (aTHX_ coro);
514 if (!mg)
515 croak ("Coro::State object required");
516
517 return (struct coro *)mg->mg_ptr;
518}
519
520#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
521
522/* faster than SvSTATE, but expects a coroutine hv */
523#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
524#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
525
526/*****************************************************************************/
527/* padlist management and caching */
528
529ecb_inline AV *
236coro_clone_padlist (pTHX_ CV *cv) 530coro_derive_padlist (pTHX_ CV *cv)
237{ 531{
238 AV *padlist = CvPADLIST (cv); 532 AV *padlist = CvPADLIST (cv);
239 AV *newpadlist, *newpad; 533 AV *newpadlist, *newpad;
240 534
241 newpadlist = newAV (); 535 newpadlist = newAV ();
242 AvREAL_off (newpadlist); 536 AvREAL_off (newpadlist);
243#if PERL_VERSION_ATLEAST (5,9,0) 537#if PERL_VERSION_ATLEAST (5,10,0)
244 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
245#else 539#else
246 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
247#endif 541#endif
248 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 542 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
249 --AvFILLp (padlist); 543 --AvFILLp (padlist);
250 544
251 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 545 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
252 av_store (newpadlist, 1, (SV *)newpad); 546 av_store (newpadlist, 1, (SV *)newpad);
253 547
254 return newpadlist; 548 return newpadlist;
255} 549}
256 550
257static void 551ecb_inline void
258free_padlist (pTHX_ AV *padlist) 552free_padlist (pTHX_ AV *padlist)
259{ 553{
260 /* may be during global destruction */ 554 /* may be during global destruction */
261 if (SvREFCNT (padlist)) 555 if (!IN_DESTRUCT)
262 { 556 {
263 I32 i = AvFILLp (padlist); 557 I32 i = AvFILLp (padlist);
264 while (i >= 0) 558
559 while (i > 0) /* special-case index 0 */
265 { 560 {
266 SV **svp = av_fetch (padlist, i--, FALSE); 561 /* we try to be extra-careful here */
267 if (svp) 562 AV *av = (AV *)AvARRAY (padlist)[i--];
268 { 563 I32 j = AvFILLp (av);
269 SV *sv; 564
270 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 565 while (j >= 0)
566 SvREFCNT_dec (AvARRAY (av)[j--]);
567
568 AvFILLp (av) = -1;
271 SvREFCNT_dec (sv); 569 SvREFCNT_dec (av);
272
273 SvREFCNT_dec (*svp);
274 }
275 } 570 }
276 571
572 SvREFCNT_dec (AvARRAY (padlist)[0]);
573
574 AvFILLp (padlist) = -1;
277 SvREFCNT_dec ((SV*)padlist); 575 SvREFCNT_dec ((SV*)padlist);
278 } 576 }
279} 577}
280 578
281static int 579static int
282coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 580coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
283{ 581{
284 AV *padlist; 582 AV *padlist;
285 AV *av = (AV *)mg->mg_obj; 583 AV *av = (AV *)mg->mg_obj;
584
585 /* perl manages to free our internal AV and _then_ call us */
586 if (IN_DESTRUCT)
587 return 0;
286 588
287 /* casting is fun. */ 589 /* casting is fun. */
288 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 590 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
289 free_padlist (aTHX_ padlist); 591 free_padlist (aTHX_ padlist);
290 592
291 SvREFCNT_dec (av); 593 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
292 594
293 return 0; 595 return 0;
294} 596}
295 597
296#define PERL_MAGIC_coro PERL_MAGIC_ext 598static MGVTBL coro_cv_vtbl = {
297 599 0, 0, 0, 0,
298static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 600 coro_cv_free
299 601};
300#define CORO_MAGIC(cv) \
301 SvMAGIC (cv) \
302 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
303 ? SvMAGIC (cv) \
304 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
305 : 0
306
307static struct coro *
308SvSTATE_ (pTHX_ SV *coro)
309{
310 HV *stash;
311 MAGIC *mg;
312
313 if (SvROK (coro))
314 coro = SvRV (coro);
315
316 if (SvTYPE (coro) != SVt_PVHV)
317 croak ("Coro::State object required");
318
319 stash = SvSTASH (coro);
320 if (stash != coro_stash && stash != coro_state_stash)
321 {
322 /* very slow, but rare, check */
323 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
324 croak ("Coro::State object required");
325 }
326
327 mg = CORO_MAGIC (coro);
328 return (struct coro *)mg->mg_ptr;
329}
330
331#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
332 602
333/* the next two functions merely cache the padlists */ 603/* the next two functions merely cache the padlists */
334static void 604ecb_inline void
335get_padlist (pTHX_ CV *cv) 605get_padlist (pTHX_ CV *cv)
336{ 606{
337 MAGIC *mg = CORO_MAGIC (cv); 607 MAGIC *mg = CORO_MAGIC_cv (cv);
338 AV *av; 608 AV *av;
339 609
340 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 610 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
341 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 611 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
342 else 612 else
343 { 613 {
344#if CORO_PREFER_PERL_FUNCTIONS 614#if CORO_PREFER_PERL_FUNCTIONS
345 /* this is probably cleaner, but also slower? */ 615 /* this is probably cleaner? but also slower! */
616 /* in practise, it seems to be less stable */
346 CV *cp = Perl_cv_clone (cv); 617 CV *cp = Perl_cv_clone (aTHX_ cv);
347 CvPADLIST (cv) = CvPADLIST (cp); 618 CvPADLIST (cv) = CvPADLIST (cp);
348 CvPADLIST (cp) = 0; 619 CvPADLIST (cp) = 0;
349 SvREFCNT_dec (cp); 620 SvREFCNT_dec (cp);
350#else 621#else
351 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 622 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
352#endif 623#endif
353 } 624 }
354} 625}
355 626
356static void 627ecb_inline void
357put_padlist (pTHX_ CV *cv) 628put_padlist (pTHX_ CV *cv)
358{ 629{
359 MAGIC *mg = CORO_MAGIC (cv); 630 MAGIC *mg = CORO_MAGIC_cv (cv);
360 AV *av; 631 AV *av;
361 632
362 if (!mg) 633 if (ecb_expect_false (!mg))
363 { 634 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
364 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
365 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
366 mg->mg_virtual = &vtbl_coro;
367 mg->mg_obj = (SV *)newAV ();
368 }
369 635
370 av = (AV *)mg->mg_obj; 636 av = (AV *)mg->mg_obj;
371 637
372 if (AvFILLp (av) >= AvMAX (av)) 638 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
373 av_extend (av, AvMAX (av) + 1); 639 av_extend (av, AvFILLp (av) + 1);
374 640
375 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 641 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
376} 642}
377 643
378/** load & save, init *******************************************************/ 644/** load & save, init *******************************************************/
379 645
380#define SB do { 646/* swap sv heads, at least logically */
381#define SE } while (0) 647static void
648swap_svs (pTHX_ Coro__State c)
649{
650 int i;
382 651
383#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 652 for (i = 0; i <= AvFILLp (c->swap_sv); )
653 {
654 SV *a = AvARRAY (c->swap_sv)[i++];
655 SV *b = AvARRAY (c->swap_sv)[i++];
656
657 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
658 SV tmp;
659
660 /* swap sv_any */
661 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
662
663 /* swap sv_flags */
664 SvFLAGS (&tmp) = SvFLAGS (a);
665 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
666 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
667
668#if PERL_VERSION_ATLEAST (5,10,0)
669 /* perl 5.10 complicates this _quite_ a bit, but it also is
670 * much faster, so no quarrels here. alternatively, we could
671 * sv_upgrade to avoid this.
672 */
673 {
674 /* swap sv_u */
675 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
676
677 /* if SvANY points to the head, we need to adjust the pointers,
678 * as the pointer for a still points to b, and maybe vice versa.
679 */
680 #define svany_in_head(type) \
681 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
682
683 if (svany_in_head (SvTYPE (a)))
684 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
685
686 if (svany_in_head (SvTYPE (b)))
687 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
688 }
689#endif
690 }
691}
692
693#define SWAP_SVS(coro) \
694 if (ecb_expect_false ((coro)->swap_sv)) \
695 swap_svs (aTHX_ (coro))
696
697static void
698on_enterleave_call (pTHX_ SV *cb);
384 699
385static void 700static void
386load_perl (pTHX_ Coro__State c) 701load_perl (pTHX_ Coro__State c)
387{ 702{
388#define VAR(name,type) PL_ ## name = c->name; 703 perl_slots *slot = c->slot;
704 c->slot = 0;
705
706 PL_mainstack = c->mainstack;
707
708#if CORO_JIT
709 load_perl_slots (slot);
710#else
711 #define VARx(name,expr,type) expr = slot->name;
389# include "state.h" 712 # include "state.h"
390#undef VAR 713 #undef VARx
391 714#endif
392 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
393 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
394 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
395 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
396
397 if (c->irssv)
398 {
399 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
400 {
401 SvREFCNT_dec (c->irssv);
402 c->irssv = 0;
403 }
404 else
405 {
406 REPLACE_SV (PL_rs, c->irssv);
407 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
408 sv_setsv (c->irssv_sv, PL_rs);
409 }
410 }
411 715
412 { 716 {
413 dSP; 717 dSP;
718
414 CV *cv; 719 CV *cv;
415 720
416 /* now do the ugly restore mess */ 721 /* now do the ugly restore mess */
417 while ((cv = (CV *)POPs)) 722 while (ecb_expect_true (cv = (CV *)POPs))
418 { 723 {
419 put_padlist (aTHX_ cv); /* mark this padlist as available */ 724 put_padlist (aTHX_ cv); /* mark this padlist as available */
420 CvDEPTH (cv) = PTR2IV (POPs); 725 CvDEPTH (cv) = PTR2IV (POPs);
421 CvPADLIST (cv) = (AV *)POPs; 726 CvPADLIST (cv) = (AV *)POPs;
422 } 727 }
423 728
424 PUTBACK; 729 PUTBACK;
425 } 730 }
731
732 slf_frame = c->slf_frame;
733 CORO_THROW = c->except;
734
735 if (ecb_expect_false (enable_times))
736 {
737 if (ecb_expect_false (!times_valid))
738 coro_times_update ();
739
740 coro_times_sub (c);
741 }
742
743 if (ecb_expect_false (c->on_enter))
744 {
745 int i;
746
747 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
748 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
749 }
750
751 SWAP_SVS (c);
426} 752}
427 753
428static void 754static void
429save_perl (pTHX_ Coro__State c) 755save_perl (pTHX_ Coro__State c)
430{ 756{
757 SWAP_SVS (c);
758
759 if (ecb_expect_false (c->on_leave))
760 {
761 int i;
762
763 for (i = AvFILLp (c->on_leave); i >= 0; --i)
764 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
765 }
766
767 times_valid = 0;
768
769 if (ecb_expect_false (enable_times))
770 {
771 coro_times_update (); times_valid = 1;
772 coro_times_add (c);
773 }
774
775 c->except = CORO_THROW;
776 c->slf_frame = slf_frame;
777
431 { 778 {
432 dSP; 779 dSP;
433 I32 cxix = cxstack_ix; 780 I32 cxix = cxstack_ix;
434 PERL_CONTEXT *ccstk = cxstack; 781 PERL_CONTEXT *ccstk = cxstack;
435 PERL_SI *top_si = PL_curstackinfo; 782 PERL_SI *top_si = PL_curstackinfo;
… …
441 788
442 XPUSHs (Nullsv); 789 XPUSHs (Nullsv);
443 /* this loop was inspired by pp_caller */ 790 /* this loop was inspired by pp_caller */
444 for (;;) 791 for (;;)
445 { 792 {
446 while (cxix >= 0) 793 while (ecb_expect_true (cxix >= 0))
447 { 794 {
448 PERL_CONTEXT *cx = &ccstk[cxix--]; 795 PERL_CONTEXT *cx = &ccstk[cxix--];
449 796
450 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 797 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
451 { 798 {
452 CV *cv = cx->blk_sub.cv; 799 CV *cv = cx->blk_sub.cv;
453 800
454 if (CvDEPTH (cv)) 801 if (ecb_expect_true (CvDEPTH (cv)))
455 { 802 {
456 EXTEND (SP, 3); 803 EXTEND (SP, 3);
457 PUSHs ((SV *)CvPADLIST (cv)); 804 PUSHs ((SV *)CvPADLIST (cv));
458 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 805 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
459 PUSHs ((SV *)cv); 806 PUSHs ((SV *)cv);
460 807
461 CvDEPTH (cv) = 0; 808 CvDEPTH (cv) = 0;
462 get_padlist (aTHX_ cv); 809 get_padlist (aTHX_ cv);
463 } 810 }
464 } 811 }
465 } 812 }
466 813
467 if (top_si->si_type == PERLSI_MAIN) 814 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
468 break; 815 break;
469 816
470 top_si = top_si->si_prev; 817 top_si = top_si->si_prev;
471 ccstk = top_si->si_cxstack; 818 ccstk = top_si->si_cxstack;
472 cxix = top_si->si_cxix; 819 cxix = top_si->si_cxix;
473 } 820 }
474 821
475 PUTBACK; 822 PUTBACK;
476 } 823 }
477 824
478 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 825 /* allocate some space on the context stack for our purposes */
479 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 826 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
480 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 827 {
481 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 828 unsigned int i;
482 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
483 829
484#define VAR(name,type)c->name = PL_ ## name; 830 for (i = 0; i < SLOT_COUNT; ++i)
831 CXINC;
832
833 cxstack_ix -= SLOT_COUNT; /* undo allocation */
834 }
835
836 c->mainstack = PL_mainstack;
837
838 {
839 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
840
841#if CORO_JIT
842 save_perl_slots (slot);
843#else
844 #define VARx(name,expr,type) slot->name = expr;
485# include "state.h" 845 # include "state.h"
486#undef VAR 846 #undef VARx
847#endif
848 }
487} 849}
488 850
489/* 851/*
490 * allocate various perl stacks. This is an exact copy 852 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 853 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 854 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 855 * not usually need a lot of stackspace.
494 */ 856 */
495#if CORO_PREFER_PERL_FUNCTIONS 857#if CORO_PREFER_PERL_FUNCTIONS
496# define coro_init_stacks init_stacks 858# define coro_init_stacks(thx) init_stacks ()
497#else 859#else
498static void 860static void
499coro_init_stacks (pTHX) 861coro_init_stacks (pTHX)
500{ 862{
501 PL_curstackinfo = new_stackinfo(64, 6); 863 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
502 PL_curstackinfo->si_type = PERLSI_MAIN; 864 PL_curstackinfo->si_type = PERLSI_MAIN;
503 PL_curstack = PL_curstackinfo->si_stack; 865 PL_curstack = PL_curstackinfo->si_stack;
504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 866 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505 867
506 PL_stack_base = AvARRAY(PL_curstack); 868 PL_stack_base = AvARRAY(PL_curstack);
507 PL_stack_sp = PL_stack_base; 869 PL_stack_sp = PL_stack_base;
508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 870 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509 871
510 New(50,PL_tmps_stack,64,SV*); 872 New(50,PL_tmps_stack,32,SV*);
511 PL_tmps_floor = -1; 873 PL_tmps_floor = -1;
512 PL_tmps_ix = -1; 874 PL_tmps_ix = -1;
513 PL_tmps_max = 64; 875 PL_tmps_max = 32;
514 876
515 New(54,PL_markstack,16,I32); 877 New(54,PL_markstack,16,I32);
516 PL_markstack_ptr = PL_markstack; 878 PL_markstack_ptr = PL_markstack;
517 PL_markstack_max = PL_markstack + 16; 879 PL_markstack_max = PL_markstack + 16;
518 880
519#ifdef SET_MARK_OFFSET 881#ifdef SET_MARK_OFFSET
520 SET_MARK_OFFSET; 882 SET_MARK_OFFSET;
521#endif 883#endif
522 884
523 New(54,PL_scopestack,16,I32); 885 New(54,PL_scopestack,8,I32);
524 PL_scopestack_ix = 0; 886 PL_scopestack_ix = 0;
525 PL_scopestack_max = 16; 887 PL_scopestack_max = 8;
888#if HAS_SCOPESTACK_NAME
889 New(54,PL_scopestack_name,8,const char*);
890#endif
526 891
527 New(54,PL_savestack,64,ANY); 892 New(54,PL_savestack,24,ANY);
528 PL_savestack_ix = 0; 893 PL_savestack_ix = 0;
529 PL_savestack_max = 64; 894 PL_savestack_max = 24;
530 895
531#if !PERL_VERSION_ATLEAST (5,9,0) 896#if !PERL_VERSION_ATLEAST (5,10,0)
532 New(54,PL_retstack,4,OP*); 897 New(54,PL_retstack,4,OP*);
533 PL_retstack_ix = 0; 898 PL_retstack_ix = 0;
534 PL_retstack_max = 4; 899 PL_retstack_max = 4;
535#endif 900#endif
536} 901}
… …
538 903
539/* 904/*
540 * destroy the stacks, the callchain etc... 905 * destroy the stacks, the callchain etc...
541 */ 906 */
542static void 907static void
543coro_destroy_stacks (pTHX) 908coro_destruct_stacks (pTHX)
544{ 909{
545 if (!IN_DESTRUCT)
546 {
547 /* restore all saved variables and stuff */
548 LEAVE_SCOPE (0);
549 assert (PL_tmps_floor == -1);
550
551 /* free all temporaries */
552 FREETMPS;
553 assert (PL_tmps_ix == -1);
554
555 /* unwind all extra stacks */
556 POPSTACK_TO (PL_mainstack);
557
558 /* unwind main stack */
559 dounwind (-1);
560 }
561
562 while (PL_curstackinfo->si_next) 910 while (PL_curstackinfo->si_next)
563 PL_curstackinfo = PL_curstackinfo->si_next; 911 PL_curstackinfo = PL_curstackinfo->si_next;
564 912
565 while (PL_curstackinfo) 913 while (PL_curstackinfo)
566 { 914 {
… …
575 } 923 }
576 924
577 Safefree (PL_tmps_stack); 925 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 926 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 927 Safefree (PL_scopestack);
928#if HAS_SCOPESTACK_NAME
929 Safefree (PL_scopestack_name);
930#endif
580 Safefree (PL_savestack); 931 Safefree (PL_savestack);
581#if !PERL_VERSION_ATLEAST (5,9,0) 932#if !PERL_VERSION_ATLEAST (5,10,0)
582 Safefree (PL_retstack); 933 Safefree (PL_retstack);
583#endif 934#endif
584} 935}
936
937#define CORO_RSS \
938 rss += sizeof (SYM (curstackinfo)); \
939 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
940 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
941 rss += SYM (tmps_max) * sizeof (SV *); \
942 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
943 rss += SYM (scopestack_max) * sizeof (I32); \
944 rss += SYM (savestack_max) * sizeof (ANY);
585 945
586static size_t 946static size_t
587coro_rss (pTHX_ struct coro *coro) 947coro_rss (pTHX_ struct coro *coro)
588{ 948{
589 size_t rss = sizeof (coro); 949 size_t rss = sizeof (*coro);
590 950
591 if (coro->mainstack) 951 if (coro->mainstack)
592 { 952 {
593 if (coro->flags & CF_RUNNING) 953 if (coro->flags & CF_RUNNING)
594 { 954 {
595 #define VAR(name,type)coro->name = PL_ ## name; 955 #define SYM(sym) PL_ ## sym
596 # include "state.h" 956 CORO_RSS;
597 #undef VAR 957 #undef SYM
598 } 958 }
599 959 else
600 rss += sizeof (coro->curstackinfo); 960 {
601 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 961 #define SYM(sym) coro->slot->sym
602 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 962 CORO_RSS;
603 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 963 #undef SYM
604 rss += coro->tmps_max * sizeof (SV *); 964 }
605 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
606 rss += coro->scopestack_max * sizeof (I32);
607 rss += coro->savestack_max * sizeof (ANY);
608
609#if !PERL_VERSION_ATLEAST (5,9,0)
610 rss += coro->retstack_max * sizeof (OP *);
611#endif
612 } 965 }
613 966
614 return rss; 967 return rss;
615} 968}
616 969
617/** coroutine stack handling ************************************************/ 970/** coroutine stack handling ************************************************/
618 971
972static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
973static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
974static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
975
976/* apparently < 5.8.8 */
977#ifndef MgPV_nolen_const
978#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
979 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
980 (const char*)(mg)->mg_ptr)
981#endif
982
983/*
984 * This overrides the default magic get method of %SIG elements.
985 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
986 * and instead of trying to save and restore the hash elements (extremely slow),
987 * we just provide our own readback here.
988 */
989static int ecb_cold
990coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
991{
992 const char *s = MgPV_nolen_const (mg);
993
994 if (*s == '_')
995 {
996 SV **svp = 0;
997
998 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
999 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1000
1001 if (svp)
1002 {
1003 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
1004 return 0;
1005 }
1006 }
1007
1008 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1009}
1010
1011static int ecb_cold
1012coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *old = *svp;
1026 *svp = 0;
1027 SvREFCNT_dec (old);
1028 return 0;
1029 }
1030 }
1031
1032 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1033}
1034
1035static int ecb_cold
1036coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1037{
1038 const char *s = MgPV_nolen_const (mg);
1039
1040 if (*s == '_')
1041 {
1042 SV **svp = 0;
1043
1044 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1045 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1046
1047 if (svp)
1048 {
1049 SV *old = *svp;
1050 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1051 SvREFCNT_dec (old);
1052 return 0;
1053 }
1054 }
1055
1056 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1057}
1058
1059static void
1060prepare_nop (pTHX_ struct coro_transfer_args *ta)
1061{
1062 /* kind of mega-hacky, but works */
1063 ta->next = ta->prev = (struct coro *)ta;
1064}
1065
619static void 1066static int
1067slf_check_nop (pTHX_ struct CoroSLF *frame)
1068{
1069 return 0;
1070}
1071
1072static int
1073slf_check_repeat (pTHX_ struct CoroSLF *frame)
1074{
1075 return 1;
1076}
1077
1078static UNOP init_perl_op;
1079
1080ecb_noinline static void /* noinline to keep it out of the transfer fast path */
620setup_coro (pTHX_ struct coro *coro) 1081init_perl (pTHX_ struct coro *coro)
621{ 1082{
622 /* 1083 /*
623 * emulate part of the perl startup here. 1084 * emulate part of the perl startup here.
624 */ 1085 */
625 coro_init_stacks (aTHX); 1086 coro_init_stacks (aTHX);
626 1087
627 PL_runops = RUNOPS_DEFAULT; 1088 PL_runops = RUNOPS_DEFAULT;
628 PL_curcop = &PL_compiling; 1089 PL_curcop = &PL_compiling;
629 PL_in_eval = EVAL_NULL; 1090 PL_in_eval = EVAL_NULL;
630 PL_comppad = 0; 1091 PL_comppad = 0;
1092 PL_comppad_name = 0;
1093 PL_comppad_name_fill = 0;
1094 PL_comppad_name_floor = 0;
631 PL_curpm = 0; 1095 PL_curpm = 0;
1096 PL_curpad = 0;
632 PL_localizing = 0; 1097 PL_localizing = 0;
633 PL_dirty = 0;
634 PL_restartop = 0; 1098 PL_restartop = 0;
1099#if PERL_VERSION_ATLEAST (5,10,0)
1100 PL_parser = 0;
1101#endif
1102 PL_hints = 0;
1103
1104 /* recreate the die/warn hooks */
1105 PL_diehook = SvREFCNT_inc (rv_diehook);
1106 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1107
1108 GvSV (PL_defgv) = newSV (0);
1109 GvAV (PL_defgv) = coro->args; coro->args = 0;
1110 GvSV (PL_errgv) = newSV (0);
1111 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1112 GvHV (PL_hintgv) = 0;
1113 PL_rs = newSVsv (GvSV (irsgv));
1114 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
635 1115
636 { 1116 {
637 dSP; 1117 dSP;
638 LOGOP myop; 1118 UNOP myop;
639 1119
640 SvREFCNT_dec (GvAV (PL_defgv));
641 GvAV (PL_defgv) = coro->args; coro->args = 0;
642
643 Zero (&myop, 1, LOGOP); 1120 Zero (&myop, 1, UNOP);
644 myop.op_next = Nullop; 1121 myop.op_next = Nullop;
1122 myop.op_type = OP_ENTERSUB;
645 myop.op_flags = OPf_WANT_VOID; 1123 myop.op_flags = OPf_WANT_VOID;
646 1124
647 PUSHMARK (SP); 1125 PUSHMARK (SP);
648 XPUSHs (av_shift (GvAV (PL_defgv))); 1126 PUSHs ((SV *)coro->startcv);
649 PUTBACK; 1127 PUTBACK;
650 PL_op = (OP *)&myop; 1128 PL_op = (OP *)&myop;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1129 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653 } 1130 }
654 1131
655 ENTER; /* necessary e.g. for dounwind */ 1132 /* this newly created coroutine might be run on an existing cctx which most
656} 1133 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1134 */
1135 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1136 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1137 slf_frame.destroy = 0;
657 1138
1139 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1140 init_perl_op.op_next = PL_op;
1141 init_perl_op.op_type = OP_ENTERSUB;
1142 init_perl_op.op_ppaddr = pp_slf;
1143 /* no flags etc. required, as an init function won't be called */
1144
1145 PL_op = (OP *)&init_perl_op;
1146
1147 /* copy throw, in case it was set before init_perl */
1148 CORO_THROW = coro->except;
1149
1150 SWAP_SVS (coro);
1151
1152 if (ecb_expect_false (enable_times))
1153 {
1154 coro_times_update ();
1155 coro_times_sub (coro);
1156 }
1157}
1158
658static void 1159static void
1160coro_unwind_stacks (pTHX)
1161{
1162 if (!IN_DESTRUCT)
1163 {
1164 /* restore all saved variables and stuff */
1165 LEAVE_SCOPE (0);
1166 assert (PL_tmps_floor == -1);
1167
1168 /* free all temporaries */
1169 FREETMPS;
1170 assert (PL_tmps_ix == -1);
1171
1172 /* unwind all extra stacks */
1173 POPSTACK_TO (PL_mainstack);
1174
1175 /* unwind main stack */
1176 dounwind (-1);
1177 }
1178}
1179
1180static void
1181destroy_perl (pTHX_ struct coro *coro)
1182{
1183 SV *svf [9];
1184
1185 {
1186 SV *old_current = SvRV (coro_current);
1187 struct coro *current = SvSTATE (old_current);
1188
1189 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1190
1191 save_perl (aTHX_ current);
1192
1193 /* this will cause transfer_check to croak on block*/
1194 SvRV_set (coro_current, (SV *)coro->hv);
1195
1196 load_perl (aTHX_ coro);
1197
1198 coro_unwind_stacks (aTHX);
1199
1200 /* restore swapped sv's */
1201 SWAP_SVS (coro);
1202
1203 coro_destruct_stacks (aTHX);
1204
1205 /* now save some sv's to be free'd later */
1206 svf [0] = GvSV (PL_defgv);
1207 svf [1] = (SV *)GvAV (PL_defgv);
1208 svf [2] = GvSV (PL_errgv);
1209 svf [3] = (SV *)PL_defoutgv;
1210 svf [4] = PL_rs;
1211 svf [5] = GvSV (irsgv);
1212 svf [6] = (SV *)GvHV (PL_hintgv);
1213 svf [7] = PL_diehook;
1214 svf [8] = PL_warnhook;
1215 assert (9 == sizeof (svf) / sizeof (*svf));
1216
1217 SvRV_set (coro_current, old_current);
1218
1219 load_perl (aTHX_ current);
1220 }
1221
1222 {
1223 unsigned int i;
1224
1225 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1226 SvREFCNT_dec (svf [i]);
1227
1228 SvREFCNT_dec (coro->saved_deffh);
1229 SvREFCNT_dec (coro->rouse_cb);
1230 SvREFCNT_dec (coro->invoke_cb);
1231 SvREFCNT_dec (coro->invoke_av);
1232 }
1233}
1234
1235ecb_inline void
659free_coro_mortal (pTHX) 1236free_coro_mortal (pTHX)
660{ 1237{
661 if (coro_mortal) 1238 if (ecb_expect_true (coro_mortal))
662 { 1239 {
663 SvREFCNT_dec (coro_mortal); 1240 SvREFCNT_dec ((SV *)coro_mortal);
664 coro_mortal = 0; 1241 coro_mortal = 0;
665 } 1242 }
666} 1243}
667 1244
668static int 1245static int
669runops_trace (pTHX) 1246runops_trace (pTHX)
670{ 1247{
671 COP *oldcop = 0; 1248 COP *oldcop = 0;
672 int oldcxix = -2; 1249 int oldcxix = -2;
673 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
674 coro_cctx *cctx = coro->cctx;
675 1250
676 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1251 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
677 { 1252 {
678 PERL_ASYNC_CHECK (); 1253 PERL_ASYNC_CHECK ();
679 1254
680 if (cctx->flags & CC_TRACE_ALL) 1255 if (cctx_current->flags & CC_TRACE_ALL)
681 { 1256 {
682 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1257 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
683 { 1258 {
684 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1259 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
685 SV **bot, **top; 1260 SV **bot, **top;
686 AV *av = newAV (); /* return values */ 1261 AV *av = newAV (); /* return values */
687 SV **cb; 1262 SV **cb;
… …
695 bot = PL_stack_base + cx->blk_oldsp + 1; 1270 bot = PL_stack_base + cx->blk_oldsp + 1;
696 top = cx->blk_gimme == G_ARRAY ? SP + 1 1271 top = cx->blk_gimme == G_ARRAY ? SP + 1
697 : cx->blk_gimme == G_SCALAR ? bot + 1 1272 : cx->blk_gimme == G_SCALAR ? bot + 1
698 : bot; 1273 : bot;
699 1274
1275 av_extend (av, top - bot);
700 while (bot < top) 1276 while (bot < top)
701 av_push (av, SvREFCNT_inc (*bot++)); 1277 av_push (av, SvREFCNT_inc_NN (*bot++));
702 1278
703 PL_runops = RUNOPS_DEFAULT; 1279 PL_runops = RUNOPS_DEFAULT;
704 ENTER; 1280 ENTER;
705 SAVETMPS; 1281 SAVETMPS;
706 EXTEND (SP, 3); 1282 EXTEND (SP, 3);
… …
723 1299
724 if (PL_curcop != &PL_compiling) 1300 if (PL_curcop != &PL_compiling)
725 { 1301 {
726 SV **cb; 1302 SV **cb;
727 1303
728 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1304 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
729 { 1305 {
730 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1306 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
731 1307
732 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1308 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
733 { 1309 {
734 runops_proc_t old_runops = PL_runops;
735 dSP; 1310 dSP;
736 GV *gv = CvGV (cx->blk_sub.cv); 1311 GV *gv = CvGV (cx->blk_sub.cv);
737 SV *fullname = sv_2mortal (newSV (0)); 1312 SV *fullname = sv_2mortal (newSV (0));
738 1313
739 if (isGV (gv)) 1314 if (isGV (gv))
… …
744 SAVETMPS; 1319 SAVETMPS;
745 EXTEND (SP, 3); 1320 EXTEND (SP, 3);
746 PUSHMARK (SP); 1321 PUSHMARK (SP);
747 PUSHs (&PL_sv_yes); 1322 PUSHs (&PL_sv_yes);
748 PUSHs (fullname); 1323 PUSHs (fullname);
749 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1324 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
750 PUTBACK; 1325 PUTBACK;
751 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1326 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
752 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1327 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
753 SPAGAIN; 1328 SPAGAIN;
754 FREETMPS; 1329 FREETMPS;
… …
757 } 1332 }
758 1333
759 oldcxix = cxstack_ix; 1334 oldcxix = cxstack_ix;
760 } 1335 }
761 1336
762 if (cctx->flags & CC_TRACE_LINE) 1337 if (cctx_current->flags & CC_TRACE_LINE)
763 { 1338 {
764 dSP; 1339 dSP;
765 1340
766 PL_runops = RUNOPS_DEFAULT; 1341 PL_runops = RUNOPS_DEFAULT;
767 ENTER; 1342 ENTER;
… …
786 1361
787 TAINT_NOT; 1362 TAINT_NOT;
788 return 0; 1363 return 0;
789} 1364}
790 1365
791/* inject a fake call to Coro::State::_cctx_init into the execution */ 1366static struct CoroSLF cctx_ssl_frame;
792/* _cctx_init should be careful, as it could be called at almost any time */
793/* during execution of a perl program */
794static void NOINLINE
795prepare_cctx (pTHX_ coro_cctx *cctx)
796{
797 dSP;
798 LOGOP myop;
799 1367
1368static void
1369slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1370{
1371 ta->prev = 0;
1372}
1373
1374static int
1375slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1376{
1377 *frame = cctx_ssl_frame;
1378
1379 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1380}
1381
1382/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1383static void ecb_noinline
1384cctx_prepare (pTHX)
1385{
800 PL_top_env = &PL_start_env; 1386 PL_top_env = &PL_start_env;
801 1387
802 if (cctx->flags & CC_TRACE) 1388 if (cctx_current->flags & CC_TRACE)
803 PL_runops = runops_trace; 1389 PL_runops = runops_trace;
804 1390
805 Zero (&myop, 1, LOGOP); 1391 /* we already must be executing an SLF op, there is no other valid way
806 myop.op_next = PL_op; 1392 * that can lead to creation of a new cctx */
807 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1393 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1394 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
808 1395
809 PUSHMARK (SP); 1396 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
810 EXTEND (SP, 2); 1397 cctx_ssl_frame = slf_frame;
811 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1398
812 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1399 slf_frame.prepare = slf_prepare_set_stacklevel;
813 PUTBACK; 1400 slf_frame.check = slf_check_set_stacklevel;
814 PL_op = (OP *)&myop; 1401}
815 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1402
816 SPAGAIN; 1403/* the tail of transfer: execute stuff we can only do after a transfer */
1404ecb_inline void
1405transfer_tail (pTHX)
1406{
1407 free_coro_mortal (aTHX);
817} 1408}
818 1409
819/* 1410/*
820 * this is a _very_ stripped down perl interpreter ;) 1411 * this is a _very_ stripped down perl interpreter ;)
821 */ 1412 */
822static void 1413static void
823coro_run (void *arg) 1414cctx_run (void *arg)
824{ 1415{
1416#ifdef USE_ITHREADS
1417# if CORO_PTHREAD
1418 PERL_SET_CONTEXT (coro_thx);
1419# endif
1420#endif
1421 {
825 dTHX; 1422 dTHX;
826 1423
827 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1424 /* normally we would need to skip the entersub here */
828 UNLOCK; 1425 /* not doing so will re-execute it, which is exactly what we want */
829
830 /* we now skip the entersub that lead to transfer() */
831 PL_op = PL_op->op_next; 1426 /* PL_nop = PL_nop->op_next */
832 1427
833 /* inject a fake subroutine call to cctx_init */ 1428 /* inject a fake subroutine call to cctx_init */
834 prepare_cctx (aTHX_ (coro_cctx *)arg); 1429 cctx_prepare (aTHX);
835 1430
1431 /* cctx_run is the alternative tail of transfer() */
1432 transfer_tail (aTHX);
1433
836 /* somebody or something will hit me for both perl_run and PL_restartop */ 1434 /* somebody or something will hit me for both perl_run and PL_restartop */
837 PL_restartop = PL_op; 1435 PL_restartop = PL_op;
838 perl_run (PL_curinterp); 1436 perl_run (PL_curinterp);
839
840 /* 1437 /*
1438 * Unfortunately, there is no way to get at the return values of the
1439 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1440 * runtime errors here, as this is just a random interpreter, not a thread.
1441 */
1442
1443 /*
841 * If perl-run returns we assume exit() was being called or the coro 1444 * If perl-run returns we assume exit() was being called or the coro
842 * fell off the end, which seems to be the only valid (non-bug) 1445 * fell off the end, which seems to be the only valid (non-bug)
843 * reason for perl_run to return. We try to exit by jumping to the 1446 * reason for perl_run to return. We try to exit by jumping to the
844 * bootstrap-time "top" top_env, as we cannot restore the "main" 1447 * bootstrap-time "top" top_env, as we cannot restore the "main"
845 * coroutine as Coro has no such concept 1448 * coroutine as Coro has no such concept.
1449 * This actually isn't valid with the pthread backend, but OSes requiring
1450 * that backend are too broken to do it in a standards-compliant way.
846 */ 1451 */
847 PL_top_env = main_top_env; 1452 PL_top_env = main_top_env;
848 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1453 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1454 }
849} 1455}
850 1456
851static coro_cctx * 1457static coro_cctx *
852cctx_new () 1458cctx_new (void)
853{ 1459{
854 coro_cctx *cctx; 1460 coro_cctx *cctx;
1461
1462 ++cctx_count;
1463 New (0, cctx, 1, coro_cctx);
1464
1465 cctx->gen = cctx_gen;
1466 cctx->flags = 0;
1467 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1468
1469 return cctx;
1470}
1471
1472/* create a new cctx only suitable as source */
1473static coro_cctx *
1474cctx_new_empty (void)
1475{
1476 coro_cctx *cctx = cctx_new ();
1477
1478 cctx->sptr = 0;
1479 coro_create (&cctx->cctx, 0, 0, 0, 0);
1480
1481 return cctx;
1482}
1483
1484/* create a new cctx suitable as destination/running a perl interpreter */
1485static coro_cctx *
1486cctx_new_run (void)
1487{
1488 coro_cctx *cctx = cctx_new ();
855 void *stack_start; 1489 void *stack_start;
856 size_t stack_size; 1490 size_t stack_size;
857 1491
858 ++cctx_count;
859
860 Newz (0, cctx, 1, coro_cctx);
861
862#if HAVE_MMAP 1492#if HAVE_MMAP
863
864 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1493 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
865 /* mmap supposedly does allocate-on-write for us */ 1494 /* mmap supposedly does allocate-on-write for us */
866 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1495 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
867 1496
868 if (cctx->sptr != (void *)-1) 1497 if (cctx->sptr != (void *)-1)
869 { 1498 {
870# if CORO_STACKGUARD 1499 #if CORO_STACKGUARD
871 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1500 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
872# endif 1501 #endif
873 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1502 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
874 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1503 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
875 cctx->flags |= CC_MAPPED; 1504 cctx->flags |= CC_MAPPED;
876 } 1505 }
877 else 1506 else
878#endif 1507#endif
879 { 1508 {
880 cctx->ssize = coro_stacksize * (long)sizeof (long); 1509 cctx->ssize = cctx_stacksize * (long)sizeof (long);
881 New (0, cctx->sptr, coro_stacksize, long); 1510 New (0, cctx->sptr, cctx_stacksize, long);
882 1511
883 if (!cctx->sptr) 1512 if (!cctx->sptr)
884 { 1513 {
885 perror ("FATAL: unable to allocate stack for coroutine"); 1514 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
886 _exit (EXIT_FAILURE); 1515 _exit (EXIT_FAILURE);
887 } 1516 }
888 1517
889 stack_start = cctx->sptr; 1518 stack_start = cctx->sptr;
890 stack_size = cctx->ssize; 1519 stack_size = cctx->ssize;
891 } 1520 }
892 1521
893 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1522 #if CORO_USE_VALGRIND
1523 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1524 #endif
1525
894 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1526 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
895 1527
896 return cctx; 1528 return cctx;
897} 1529}
898 1530
899static void 1531static void
900cctx_destroy (coro_cctx *cctx) 1532cctx_destroy (coro_cctx *cctx)
901{ 1533{
902 if (!cctx) 1534 if (!cctx)
903 return; 1535 return;
904 1536
1537 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1538
905 --cctx_count; 1539 --cctx_count;
1540 coro_destroy (&cctx->cctx);
906 1541
1542 /* coro_transfer creates new, empty cctx's */
1543 if (cctx->sptr)
1544 {
907#if CORO_USE_VALGRIND 1545 #if CORO_USE_VALGRIND
908 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1546 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
909#endif 1547 #endif
910 1548
911#if HAVE_MMAP 1549#if HAVE_MMAP
912 if (cctx->flags & CC_MAPPED) 1550 if (cctx->flags & CC_MAPPED)
913 munmap (cctx->sptr, cctx->ssize); 1551 munmap (cctx->sptr, cctx->ssize);
914 else 1552 else
915#endif 1553#endif
916 Safefree (cctx->sptr); 1554 Safefree (cctx->sptr);
1555 }
917 1556
918 Safefree (cctx); 1557 Safefree (cctx);
919} 1558}
1559
1560/* wether this cctx should be destructed */
1561#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
920 1562
921static coro_cctx * 1563static coro_cctx *
922cctx_get (pTHX) 1564cctx_get (pTHX)
923{ 1565{
924 while (cctx_first) 1566 while (ecb_expect_true (cctx_first))
925 { 1567 {
926 coro_cctx *cctx = cctx_first; 1568 coro_cctx *cctx = cctx_first;
927 cctx_first = cctx->next; 1569 cctx_first = cctx->next;
928 --cctx_idle; 1570 --cctx_idle;
929 1571
930 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1572 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
931 return cctx; 1573 return cctx;
932 1574
933 cctx_destroy (cctx); 1575 cctx_destroy (cctx);
934 } 1576 }
935 1577
936 return cctx_new (); 1578 return cctx_new_run ();
937} 1579}
938 1580
939static void 1581static void
940cctx_put (coro_cctx *cctx) 1582cctx_put (coro_cctx *cctx)
941{ 1583{
1584 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1585
942 /* free another cctx if overlimit */ 1586 /* free another cctx if overlimit */
943 if (cctx_idle >= MAX_IDLE_CCTX) 1587 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
944 { 1588 {
945 coro_cctx *first = cctx_first; 1589 coro_cctx *first = cctx_first;
946 cctx_first = first->next; 1590 cctx_first = first->next;
947 --cctx_idle; 1591 --cctx_idle;
948 1592
… …
954 cctx_first = cctx; 1598 cctx_first = cctx;
955} 1599}
956 1600
957/** coroutine switching *****************************************************/ 1601/** coroutine switching *****************************************************/
958 1602
959static void NOINLINE 1603static void
960transfer_check (pTHX_ struct coro *prev, struct coro *next) 1604transfer_check (pTHX_ struct coro *prev, struct coro *next)
961{ 1605{
962 if (prev != next) 1606 /* TODO: throwing up here is considered harmful */
1607
1608 if (ecb_expect_true (prev != next))
963 { 1609 {
964 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1610 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
965 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1611 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
966 1612
967 if (next->flags & CF_RUNNING) 1613 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
968 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
969
970 if (next->flags & CF_DESTROYED)
971 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1614 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
972 1615
1616#if !PERL_VERSION_ATLEAST (5,10,0)
973 if (PL_lex_state != LEX_NOTPARSING) 1617 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
974 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1618 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1619#endif
975 } 1620 }
976} 1621}
977 1622
978/* always use the TRANSFER macro */ 1623/* always use the TRANSFER macro */
979static void NOINLINE 1624static void ecb_noinline /* noinline so we have a fixed stackframe */
980transfer (pTHX_ struct coro *prev, struct coro *next) 1625transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
981{ 1626{
982 dSTACKLEVEL; 1627 dSTACKLEVEL;
983 1628
984 /* sometimes transfer is only called to set idle_sp */ 1629 /* sometimes transfer is only called to set idle_sp */
985 if (!next) 1630 if (ecb_expect_false (!prev))
986 { 1631 {
987 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1632 cctx_current->idle_sp = STACKLEVEL;
988 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1633 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
989 }
990 else if (prev != next)
991 { 1634 }
1635 else if (ecb_expect_true (prev != next))
1636 {
992 coro_cctx *prev__cctx; 1637 coro_cctx *cctx_prev;
993 1638
994 if (prev->flags & CF_NEW) 1639 if (ecb_expect_false (prev->flags & CF_NEW))
995 { 1640 {
996 /* create a new empty context */ 1641 /* create a new empty/source context */
997 Newz (0, prev->cctx, 1, coro_cctx);
998 prev->flags &= ~CF_NEW; 1642 prev->flags &= ~CF_NEW;
999 prev->flags |= CF_RUNNING; 1643 prev->flags |= CF_RUNNING;
1000 } 1644 }
1001 1645
1002 prev->flags &= ~CF_RUNNING; 1646 prev->flags &= ~CF_RUNNING;
1003 next->flags |= CF_RUNNING; 1647 next->flags |= CF_RUNNING;
1004 1648
1005 LOCK; 1649 /* first get rid of the old state */
1650 save_perl (aTHX_ prev);
1006 1651
1007 if (next->flags & CF_NEW) 1652 if (ecb_expect_false (next->flags & CF_NEW))
1008 { 1653 {
1009 /* need to start coroutine */ 1654 /* need to start coroutine */
1010 next->flags &= ~CF_NEW; 1655 next->flags &= ~CF_NEW;
1011 /* first get rid of the old state */
1012 save_perl (aTHX_ prev);
1013 /* setup coroutine call */ 1656 /* setup coroutine call */
1014 setup_coro (aTHX_ next); 1657 init_perl (aTHX_ next);
1015 } 1658 }
1016 else 1659 else
1660 load_perl (aTHX_ next);
1661
1662 /* possibly untie and reuse the cctx */
1663 if (ecb_expect_true (
1664 cctx_current->idle_sp == STACKLEVEL
1665 && !(cctx_current->flags & CC_TRACE)
1666 && !force_cctx
1667 ))
1017 { 1668 {
1018 /* coroutine already started */ 1669 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1019 save_perl (aTHX_ prev); 1670 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1020 load_perl (aTHX_ next); 1671
1672 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1673 /* without this the next cctx_get might destroy the running cctx while still in use */
1674 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1675 if (ecb_expect_true (!next->cctx))
1676 next->cctx = cctx_get (aTHX);
1677
1678 cctx_put (cctx_current);
1021 } 1679 }
1680 else
1681 prev->cctx = cctx_current;
1022 1682
1023 prev__cctx = prev->cctx; 1683 ++next->usecount;
1024 1684
1025 /* possibly "free" the cctx */ 1685 cctx_prev = cctx_current;
1026 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1686 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1687
1688 next->cctx = 0;
1689
1690 if (ecb_expect_false (cctx_prev != cctx_current))
1027 { 1691 {
1028 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1692 cctx_prev->top_env = PL_top_env;
1029 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1693 PL_top_env = cctx_current->top_env;
1030 1694 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1031 prev->cctx = 0;
1032
1033 cctx_put (prev__cctx);
1034 } 1695 }
1035 1696
1036 ++next->usecount; 1697 transfer_tail (aTHX);
1037
1038 if (!next->cctx)
1039 next->cctx = cctx_get (aTHX);
1040
1041 if (prev__cctx != next->cctx)
1042 {
1043 prev__cctx->top_env = PL_top_env;
1044 PL_top_env = next->cctx->top_env;
1045 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1046 }
1047
1048 free_coro_mortal (aTHX);
1049 UNLOCK;
1050 } 1698 }
1051} 1699}
1052 1700
1053struct transfer_args
1054{
1055 struct coro *prev, *next;
1056};
1057
1058#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1701#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1059#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1702#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1060 1703
1061/** high level stuff ********************************************************/ 1704/** high level stuff ********************************************************/
1062 1705
1706/* this function is actually Coro, not Coro::State, but we call it from here */
1707/* because it is convenient - but it hasn't been declared yet for that reason */
1063static int 1708static void
1709coro_call_on_destroy (pTHX_ struct coro *coro);
1710
1711static void
1064coro_state_destroy (pTHX_ struct coro *coro) 1712coro_state_destroy (pTHX_ struct coro *coro)
1065{ 1713{
1066 if (coro->flags & CF_DESTROYED) 1714 if (coro->flags & CF_ZOMBIE)
1067 return 0; 1715 return;
1068 1716
1717 slf_destroy (aTHX_ coro);
1718
1069 coro->flags |= CF_DESTROYED; 1719 coro->flags |= CF_ZOMBIE;
1070 1720
1071 if (coro->flags & CF_READY) 1721 if (coro->flags & CF_READY)
1072 { 1722 {
1073 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1723 /* reduce nready, as destroying a ready coro effectively unreadies it */
1074 /* alternative: look through all ready queues and remove the coro */ 1724 /* alternative: look through all ready queues and remove the coro */
1075 LOCK;
1076 --coro_nready; 1725 --coro_nready;
1077 UNLOCK;
1078 } 1726 }
1079 else 1727 else
1080 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1728 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1081
1082 if (coro->mainstack && coro->mainstack != main_mainstack)
1083 {
1084 struct coro temp;
1085
1086 assert (!(coro->flags & CF_RUNNING));
1087
1088 Zero (&temp, 1, struct coro);
1089 temp.save = CORO_SAVE_ALL;
1090
1091 if (coro->flags & CF_RUNNING)
1092 croak ("FATAL: tried to destroy currently running coroutine");
1093
1094 save_perl (aTHX_ &temp);
1095 load_perl (aTHX_ coro);
1096
1097 coro_destroy_stacks (aTHX);
1098
1099 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1100
1101 coro->mainstack = 0;
1102 }
1103
1104 cctx_destroy (coro->cctx);
1105 SvREFCNT_dec (coro->args);
1106 1729
1107 if (coro->next) coro->next->prev = coro->prev; 1730 if (coro->next) coro->next->prev = coro->prev;
1108 if (coro->prev) coro->prev->next = coro->next; 1731 if (coro->prev) coro->prev->next = coro->next;
1109 if (coro == coro_first) coro_first = coro->next; 1732 if (coro == coro_first) coro_first = coro->next;
1110 1733
1111 return 1; 1734 if (coro->mainstack
1735 && coro->mainstack != main_mainstack
1736 && coro->slot
1737 && !PL_dirty)
1738 destroy_perl (aTHX_ coro);
1739
1740 cctx_destroy (coro->cctx);
1741 SvREFCNT_dec (coro->startcv);
1742 SvREFCNT_dec (coro->args);
1743 SvREFCNT_dec (coro->swap_sv);
1744 SvREFCNT_dec (CORO_THROW);
1745
1746 coro_call_on_destroy (aTHX_ coro);
1747
1748 /* more destruction mayhem in coro_state_free */
1112} 1749}
1113 1750
1114static int 1751static int
1115coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1752coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1116{ 1753{
1117 struct coro *coro = (struct coro *)mg->mg_ptr; 1754 struct coro *coro = (struct coro *)mg->mg_ptr;
1118 mg->mg_ptr = 0; 1755 mg->mg_ptr = 0;
1119 1756
1120 coro->hv = 0;
1121
1122 if (--coro->refcnt < 0)
1123 {
1124 coro_state_destroy (aTHX_ coro); 1757 coro_state_destroy (aTHX_ coro);
1758 SvREFCNT_dec (coro->on_destroy);
1759 SvREFCNT_dec (coro->status);
1760
1125 Safefree (coro); 1761 Safefree (coro);
1126 }
1127 1762
1128 return 0; 1763 return 0;
1129} 1764}
1130 1765
1131static int 1766static int ecb_cold
1132coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1767coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1133{ 1768{
1134 struct coro *coro = (struct coro *)mg->mg_ptr; 1769 /* called when perl clones the current process the slow way (windows process emulation) */
1135 1770 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1136 ++coro->refcnt; 1771 mg->mg_ptr = 0;
1772 mg->mg_virtual = 0;
1137 1773
1138 return 0; 1774 return 0;
1139} 1775}
1140 1776
1141static MGVTBL coro_state_vtbl = { 1777static MGVTBL coro_state_vtbl = {
… …
1148# define MGf_DUP 0 1784# define MGf_DUP 0
1149#endif 1785#endif
1150}; 1786};
1151 1787
1152static void 1788static void
1153prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1789prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1154{ 1790{
1155 ta->prev = SvSTATE (prev_sv); 1791 ta->prev = SvSTATE (prev_sv);
1156 ta->next = SvSTATE (next_sv); 1792 ta->next = SvSTATE (next_sv);
1157 TRANSFER_CHECK (*ta); 1793 TRANSFER_CHECK (*ta);
1158} 1794}
1159 1795
1160static void 1796static void
1161api_transfer (SV *prev_sv, SV *next_sv) 1797api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1798{
1799 struct coro_transfer_args ta;
1800
1801 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1802 TRANSFER (ta, 1);
1803}
1804
1805/** Coro ********************************************************************/
1806
1807ecb_inline void
1808coro_enq (pTHX_ struct coro *coro)
1809{
1810 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1811
1812 SvREFCNT_inc_NN (coro->hv);
1813
1814 coro->next_ready = 0;
1815 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1816 ready [1] = coro;
1817}
1818
1819ecb_inline struct coro *
1820coro_deq (pTHX)
1821{
1822 int prio;
1823
1824 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1825 {
1826 struct coro **ready = coro_ready [prio];
1827
1828 if (ready [0])
1829 {
1830 struct coro *coro = ready [0];
1831 ready [0] = coro->next_ready;
1832 return coro;
1833 }
1834 }
1835
1836 return 0;
1837}
1838
1839static void
1840invoke_sv_ready_hook_helper (void)
1162{ 1841{
1163 dTHX; 1842 dTHX;
1164 struct transfer_args ta; 1843 dSP;
1165 1844
1166 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1845 ENTER;
1167 TRANSFER (ta); 1846 SAVETMPS;
1847
1848 PUSHMARK (SP);
1849 PUTBACK;
1850 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1851
1852 FREETMPS;
1853 LEAVE;
1168} 1854}
1169 1855
1170static int 1856static int
1171api_save (SV *coro_sv, int new_save) 1857api_ready (pTHX_ SV *coro_sv)
1172{ 1858{
1173 dTHX;
1174 struct coro *coro = SvSTATE (coro_sv); 1859 struct coro *coro = SvSTATE (coro_sv);
1175 int old_save = coro->save;
1176
1177 if (new_save >= 0)
1178 coro->save = new_save;
1179
1180 return old_save;
1181}
1182
1183/** Coro ********************************************************************/
1184
1185static void
1186coro_enq (pTHX_ SV *coro_sv)
1187{
1188 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1189}
1190
1191static SV *
1192coro_deq (pTHX_ int min_prio)
1193{
1194 int prio = PRIO_MAX - PRIO_MIN;
1195
1196 min_prio -= PRIO_MIN;
1197 if (min_prio < 0)
1198 min_prio = 0;
1199
1200 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1201 if (AvFILLp (coro_ready [prio]) >= 0)
1202 return av_shift (coro_ready [prio]);
1203
1204 return 0;
1205}
1206
1207static int
1208api_ready (SV *coro_sv)
1209{
1210 dTHX;
1211 struct coro *coro;
1212
1213 if (SvROK (coro_sv))
1214 coro_sv = SvRV (coro_sv);
1215
1216 coro = SvSTATE (coro_sv);
1217 1860
1218 if (coro->flags & CF_READY) 1861 if (coro->flags & CF_READY)
1219 return 0; 1862 return 0;
1220 1863
1221 coro->flags |= CF_READY; 1864 coro->flags |= CF_READY;
1222 1865
1223 LOCK; 1866 coro_enq (aTHX_ coro);
1224 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1867
1225 ++coro_nready; 1868 if (!coro_nready++)
1226 UNLOCK; 1869 if (coroapi.readyhook)
1870 coroapi.readyhook ();
1227 1871
1228 return 1; 1872 return 1;
1229} 1873}
1230 1874
1231static int 1875static int
1232api_is_ready (SV *coro_sv) 1876api_is_ready (pTHX_ SV *coro_sv)
1233{ 1877{
1234 dTHX;
1235 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1878 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1236} 1879}
1237 1880
1238static void 1881/* expects to own a reference to next->hv */
1882ecb_inline void
1239prepare_schedule (pTHX_ struct transfer_args *ta) 1883prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1240{ 1884{
1241 SV *prev_sv, *next_sv;
1242
1243 for (;;)
1244 {
1245 LOCK;
1246 next_sv = coro_deq (aTHX_ PRIO_MIN);
1247
1248 /* nothing to schedule: call the idle handler */
1249 if (!next_sv)
1250 {
1251 dSP;
1252 UNLOCK;
1253
1254 ENTER;
1255 SAVETMPS;
1256
1257 PUSHMARK (SP);
1258 PUTBACK;
1259 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1260
1261 FREETMPS;
1262 LEAVE;
1263 continue;
1264 }
1265
1266 ta->next = SvSTATE (next_sv);
1267
1268 /* cannot transfer to destroyed coros, skip and look for next */
1269 if (ta->next->flags & CF_DESTROYED)
1270 {
1271 UNLOCK;
1272 SvREFCNT_dec (next_sv);
1273 /* coro_nready is already taken care of by destroy */
1274 continue;
1275 }
1276
1277 --coro_nready;
1278 UNLOCK;
1279 break;
1280 }
1281
1282 /* free this only after the transfer */
1283 prev_sv = SvRV (coro_current); 1885 SV *prev_sv = SvRV (coro_current);
1886
1284 ta->prev = SvSTATE (prev_sv); 1887 ta->prev = SvSTATE_hv (prev_sv);
1888 ta->next = next;
1889
1285 TRANSFER_CHECK (*ta); 1890 TRANSFER_CHECK (*ta);
1286 assert (ta->next->flags & CF_READY); 1891
1287 ta->next->flags &= ~CF_READY;
1288 SvRV_set (coro_current, next_sv); 1892 SvRV_set (coro_current, (SV *)next->hv);
1289 1893
1290 LOCK;
1291 free_coro_mortal (aTHX); 1894 free_coro_mortal (aTHX);
1292 coro_mortal = prev_sv; 1895 coro_mortal = prev_sv;
1293 UNLOCK;
1294} 1896}
1295 1897
1296static void 1898static void
1899prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1900{
1901 for (;;)
1902 {
1903 struct coro *next = coro_deq (aTHX);
1904
1905 if (ecb_expect_true (next))
1906 {
1907 /* cannot transfer to destroyed coros, skip and look for next */
1908 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1909 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1910 else
1911 {
1912 next->flags &= ~CF_READY;
1913 --coro_nready;
1914
1915 prepare_schedule_to (aTHX_ ta, next);
1916 break;
1917 }
1918 }
1919 else
1920 {
1921 /* nothing to schedule: call the idle handler */
1922 if (SvROK (sv_idle)
1923 && SvOBJECT (SvRV (sv_idle)))
1924 {
1925 if (SvRV (sv_idle) == SvRV (coro_current))
1926 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1927
1928 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1929 api_ready (aTHX_ SvRV (sv_idle));
1930 --coro_nready;
1931 }
1932 else
1933 {
1934 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1935 dSP;
1936
1937 ENTER;
1938 SAVETMPS;
1939
1940 PUSHMARK (SP);
1941 PUTBACK;
1942 call_sv (sv_idle, G_VOID | G_DISCARD);
1943
1944 FREETMPS;
1945 LEAVE;
1946 }
1947 }
1948 }
1949}
1950
1951ecb_inline void
1297prepare_cede (pTHX_ struct transfer_args *ta) 1952prepare_cede (pTHX_ struct coro_transfer_args *ta)
1298{ 1953{
1299 api_ready (coro_current); 1954 api_ready (aTHX_ coro_current);
1300 prepare_schedule (aTHX_ ta); 1955 prepare_schedule (aTHX_ ta);
1301} 1956}
1302 1957
1958ecb_inline void
1959prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1960{
1961 SV *prev = SvRV (coro_current);
1962
1963 if (coro_nready)
1964 {
1965 prepare_schedule (aTHX_ ta);
1966 api_ready (aTHX_ prev);
1967 }
1968 else
1969 prepare_nop (aTHX_ ta);
1970}
1971
1972static void
1973api_schedule (pTHX)
1974{
1975 struct coro_transfer_args ta;
1976
1977 prepare_schedule (aTHX_ &ta);
1978 TRANSFER (ta, 1);
1979}
1980
1981static void
1982api_schedule_to (pTHX_ SV *coro_sv)
1983{
1984 struct coro_transfer_args ta;
1985 struct coro *next = SvSTATE (coro_sv);
1986
1987 SvREFCNT_inc_NN (coro_sv);
1988 prepare_schedule_to (aTHX_ &ta, next);
1989}
1990
1303static int 1991static int
1304prepare_cede_notself (pTHX_ struct transfer_args *ta) 1992api_cede (pTHX)
1305{ 1993{
1306 if (coro_nready) 1994 struct coro_transfer_args ta;
1307 { 1995
1308 SV *prev = SvRV (coro_current);
1309 prepare_schedule (aTHX_ ta); 1996 prepare_cede (aTHX_ &ta);
1310 api_ready (prev); 1997
1998 if (ecb_expect_true (ta.prev != ta.next))
1999 {
2000 TRANSFER (ta, 1);
1311 return 1; 2001 return 1;
1312 } 2002 }
1313 else 2003 else
1314 return 0; 2004 return 0;
1315} 2005}
1316 2006
1317static void
1318api_schedule (void)
1319{
1320 dTHX;
1321 struct transfer_args ta;
1322
1323 prepare_schedule (aTHX_ &ta);
1324 TRANSFER (ta);
1325}
1326
1327static int 2007static int
1328api_cede (void) 2008api_cede_notself (pTHX)
1329{ 2009{
1330 dTHX; 2010 if (coro_nready)
2011 {
1331 struct transfer_args ta; 2012 struct coro_transfer_args ta;
1332 2013
1333 prepare_cede (aTHX_ &ta); 2014 prepare_cede_notself (aTHX_ &ta);
1334
1335 if (ta.prev != ta.next)
1336 {
1337 TRANSFER (ta); 2015 TRANSFER (ta, 1);
1338 return 1; 2016 return 1;
1339 } 2017 }
1340 else 2018 else
1341 return 0; 2019 return 0;
1342} 2020}
1343 2021
1344static int 2022static void
1345api_cede_notself (void)
1346{
1347 dTHX;
1348 struct transfer_args ta;
1349
1350 if (prepare_cede_notself (aTHX_ &ta))
1351 {
1352 TRANSFER (ta);
1353 return 1;
1354 }
1355 else
1356 return 0;
1357}
1358
1359static void
1360api_trace (SV *coro_sv, int flags) 2023api_trace (pTHX_ SV *coro_sv, int flags)
1361{ 2024{
1362 dTHX;
1363 struct coro *coro = SvSTATE (coro_sv); 2025 struct coro *coro = SvSTATE (coro_sv);
1364 2026
2027 if (coro->flags & CF_RUNNING)
2028 croak ("cannot enable tracing on a running coroutine, caught");
2029
1365 if (flags & CC_TRACE) 2030 if (flags & CC_TRACE)
1366 { 2031 {
1367 if (!coro->cctx) 2032 if (!coro->cctx)
1368 coro->cctx = cctx_new (); 2033 coro->cctx = cctx_new_run ();
1369 else if (!(coro->cctx->flags & CC_TRACE)) 2034 else if (!(coro->cctx->flags & CC_TRACE))
1370 croak ("cannot enable tracing on coroutine with custom stack"); 2035 croak ("cannot enable tracing on coroutine with custom stack, caught");
1371 2036
1372 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2037 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1373 } 2038 }
1374 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2039 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1375 { 2040 {
1376 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2041 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1377 2042
1378 if (coro->flags & CF_RUNNING) 2043 if (coro->flags & CF_RUNNING)
1379 PL_runops = RUNOPS_DEFAULT; 2044 PL_runops = RUNOPS_DEFAULT;
1380 else 2045 else
1381 coro->runops = RUNOPS_DEFAULT; 2046 coro->slot->runops = RUNOPS_DEFAULT;
2047 }
2048}
2049
2050static void
2051coro_push_av (pTHX_ AV *av, I32 gimme_v)
2052{
2053 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2054 {
2055 dSP;
2056
2057 if (gimme_v == G_SCALAR)
2058 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2059 else
2060 {
2061 int i;
2062 EXTEND (SP, AvFILLp (av) + 1);
2063
2064 for (i = 0; i <= AvFILLp (av); ++i)
2065 PUSHs (AvARRAY (av)[i]);
2066 }
2067
2068 PUTBACK;
2069 }
2070}
2071
2072static void
2073coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2074{
2075 if (!coro->on_destroy)
2076 coro->on_destroy = newAV ();
2077
2078 av_push (coro->on_destroy, cb);
2079}
2080
2081static void
2082slf_destroy_join (pTHX_ struct CoroSLF *frame)
2083{
2084 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2085}
2086
2087static int
2088slf_check_join (pTHX_ struct CoroSLF *frame)
2089{
2090 struct coro *coro = (struct coro *)frame->data;
2091
2092 if (!coro->status)
2093 return 1;
2094
2095 frame->destroy = 0;
2096
2097 coro_push_av (aTHX_ coro->status, GIMME_V);
2098
2099 SvREFCNT_dec ((SV *)coro->hv);
2100
2101 return 0;
2102}
2103
2104static void
2105slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2108
2109 if (items > 1)
2110 croak ("join called with too many arguments");
2111
2112 if (coro->status)
2113 frame->prepare = prepare_nop;
2114 else
2115 {
2116 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2117 frame->prepare = prepare_schedule;
2118 }
2119
2120 frame->check = slf_check_join;
2121 frame->destroy = slf_destroy_join;
2122 frame->data = (void *)coro;
2123 SvREFCNT_inc (coro->hv);
2124}
2125
2126static void
2127coro_call_on_destroy (pTHX_ struct coro *coro)
2128{
2129 AV *od = coro->on_destroy;
2130
2131 if (!od)
2132 return;
2133
2134 while (AvFILLp (od) >= 0)
2135 {
2136 SV *cb = sv_2mortal (av_pop (od));
2137
2138 /* coro hv's (and only hv's at the moment) are supported as well */
2139 if (SvSTATEhv_p (aTHX_ cb))
2140 api_ready (aTHX_ cb);
2141 else
2142 {
2143 dSP; /* don't disturb outer sp */
2144 PUSHMARK (SP);
2145
2146 if (coro->status)
2147 {
2148 PUTBACK;
2149 coro_push_av (aTHX_ coro->status, G_ARRAY);
2150 SPAGAIN;
2151 }
2152
2153 PUTBACK;
2154 call_sv (cb, G_VOID | G_DISCARD);
2155 }
2156 }
2157}
2158
2159static void
2160coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2161{
2162 AV *av;
2163
2164 if (coro->status)
2165 {
2166 av = coro->status;
2167 av_clear (av);
2168 }
2169 else
2170 av = coro->status = newAV ();
2171
2172 /* items are actually not so common, so optimise for this case */
2173 if (items)
2174 {
2175 int i;
2176
2177 av_extend (av, items - 1);
2178
2179 for (i = 0; i < items; ++i)
2180 av_push (av, SvREFCNT_inc_NN (arg [i]));
2181 }
2182}
2183
2184static void
2185slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2186{
2187 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2188 api_ready (aTHX_ sv_manager);
2189
2190 frame->prepare = prepare_schedule;
2191 frame->check = slf_check_repeat;
2192
2193 /* as a minor optimisation, we could unwind all stacks here */
2194 /* but that puts extra pressure on pp_slf, and is not worth much */
2195 /*coro_unwind_stacks (aTHX);*/
2196}
2197
2198static void
2199slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2200{
2201 HV *coro_hv = (HV *)SvRV (coro_current);
2202
2203 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2204 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2205}
2206
2207static void
2208slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 HV *coro_hv;
2211 struct coro *coro;
2212
2213 if (items <= 0)
2214 croak ("Coro::cancel called without coro object,");
2215
2216 coro = SvSTATE (arg [0]);
2217 coro_hv = coro->hv;
2218
2219 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2220
2221 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2222 {
2223 /* coro currently busy cancelling something, so just notify it */
2224 coro->slf_frame.data = (void *)coro;
2225
2226 frame->prepare = prepare_nop;
2227 frame->check = slf_check_nop;
2228 }
2229 else if (coro_hv == (HV *)SvRV (coro_current))
2230 {
2231 /* cancelling the current coro is allowed, and equals terminate */
2232 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2233 }
2234 else
2235 {
2236 struct coro *self = SvSTATE_current;
2237
2238 /* otherwise we cancel directly, purely for speed reasons
2239 * unfortunately, this requires some magic trickery, as
2240 * somebody else could cancel us, so we have to fight the cancellation.
2241 * this is ugly, and hopefully fully worth the extra speed.
2242 * besides, I can't get the slow-but-safe version working...
2243 */
2244 slf_frame.data = 0;
2245 self->flags |= CF_NOCANCEL;
2246 coro_state_destroy (aTHX_ coro);
2247 self->flags &= ~CF_NOCANCEL;
2248
2249 if (slf_frame.data)
2250 {
2251 /* while we were busy we have been cancelled, so terminate */
2252 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2253 }
2254 else
2255 {
2256 frame->prepare = prepare_nop;
2257 frame->check = slf_check_nop;
2258 }
2259 }
2260}
2261
2262static int
2263slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2264{
2265 frame->prepare = 0;
2266 coro_unwind_stacks (aTHX);
2267
2268 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2269
2270 return 1;
2271}
2272
2273static int
2274safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2275{
2276 if (coro->cctx)
2277 croak ("coro inside C callback, unable to cancel at this time, caught");
2278
2279 if (coro->flags & CF_NEW)
2280 {
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro_state_destroy (aTHX_ coro);
2283 }
2284 else
2285 {
2286 if (!coro->slf_frame.prepare)
2287 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2288
2289 slf_destroy (aTHX_ coro);
2290
2291 coro_set_status (aTHX_ coro, arg, items);
2292 coro->slf_frame.prepare = prepare_nop;
2293 coro->slf_frame.check = slf_check_safe_cancel;
2294
2295 api_ready (aTHX_ (SV *)coro->hv);
2296 }
2297
2298 return 1;
2299}
2300
2301/*****************************************************************************/
2302/* async pool handler */
2303
2304static int
2305slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2306{
2307 HV *hv = (HV *)SvRV (coro_current);
2308 struct coro *coro = (struct coro *)frame->data;
2309
2310 if (!coro->invoke_cb)
2311 return 1; /* loop till we have invoke */
2312 else
2313 {
2314 hv_store (hv, "desc", sizeof ("desc") - 1,
2315 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2316
2317 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2318
2319 {
2320 dSP;
2321 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2322 PUTBACK;
1382 } 2323 }
2324
2325 SvREFCNT_dec (GvAV (PL_defgv));
2326 GvAV (PL_defgv) = coro->invoke_av;
2327 coro->invoke_av = 0;
2328
2329 return 0;
2330 }
1383} 2331}
2332
2333static void
2334slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2335{
2336 HV *hv = (HV *)SvRV (coro_current);
2337 struct coro *coro = SvSTATE_hv ((SV *)hv);
2338
2339 if (ecb_expect_true (coro->saved_deffh))
2340 {
2341 /* subsequent iteration */
2342 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2343 coro->saved_deffh = 0;
2344
2345 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2346 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2347 {
2348 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2349 return;
2350 }
2351 else
2352 {
2353 av_clear (GvAV (PL_defgv));
2354 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2355
2356 coro->prio = 0;
2357
2358 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2359 api_trace (aTHX_ coro_current, 0);
2360
2361 frame->prepare = prepare_schedule;
2362 av_push (av_async_pool, SvREFCNT_inc (hv));
2363 }
2364 }
2365 else
2366 {
2367 /* first iteration, simply fall through */
2368 frame->prepare = prepare_nop;
2369 }
2370
2371 frame->check = slf_check_pool_handler;
2372 frame->data = (void *)coro;
2373}
2374
2375/*****************************************************************************/
2376/* rouse callback */
2377
2378#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2379
2380static void
2381coro_rouse_callback (pTHX_ CV *cv)
2382{
2383 dXSARGS;
2384 SV *data = (SV *)S_GENSUB_ARG;
2385
2386 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2387 {
2388 /* first call, set args */
2389 SV *coro = SvRV (data);
2390 AV *av = newAV ();
2391
2392 SvRV_set (data, (SV *)av);
2393
2394 /* better take a full copy of the arguments */
2395 while (items--)
2396 av_store (av, items, newSVsv (ST (items)));
2397
2398 api_ready (aTHX_ coro);
2399 SvREFCNT_dec (coro);
2400 }
2401
2402 XSRETURN_EMPTY;
2403}
2404
2405static int
2406slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2407{
2408 SV *data = (SV *)frame->data;
2409
2410 if (CORO_THROW)
2411 return 0;
2412
2413 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2414 return 1;
2415
2416 /* now push all results on the stack */
2417 {
2418 dSP;
2419 AV *av = (AV *)SvRV (data);
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (av) + 1);
2423 for (i = 0; i <= AvFILLp (av); ++i)
2424 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2425
2426 /* we have stolen the elements, so set length to zero and free */
2427 AvFILLp (av) = -1;
2428 av_undef (av);
2429
2430 PUTBACK;
2431 }
2432
2433 return 0;
2434}
2435
2436static void
2437slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2438{
2439 SV *cb;
2440
2441 if (items)
2442 cb = arg [0];
2443 else
2444 {
2445 struct coro *coro = SvSTATE_current;
2446
2447 if (!coro->rouse_cb)
2448 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2449
2450 cb = sv_2mortal (coro->rouse_cb);
2451 coro->rouse_cb = 0;
2452 }
2453
2454 if (!SvROK (cb)
2455 || SvTYPE (SvRV (cb)) != SVt_PVCV
2456 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2457 croak ("Coro::rouse_wait called with illegal callback argument,");
2458
2459 {
2460 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2461 SV *data = (SV *)S_GENSUB_ARG;
2462
2463 frame->data = (void *)data;
2464 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2465 frame->check = slf_check_rouse_wait;
2466 }
2467}
2468
2469static SV *
2470coro_new_rouse_cb (pTHX)
2471{
2472 HV *hv = (HV *)SvRV (coro_current);
2473 struct coro *coro = SvSTATE_hv (hv);
2474 SV *data = newRV_inc ((SV *)hv);
2475 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2476
2477 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2478 SvREFCNT_dec (data); /* magicext increases the refcount */
2479
2480 SvREFCNT_dec (coro->rouse_cb);
2481 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2482
2483 return cb;
2484}
2485
2486/*****************************************************************************/
2487/* schedule-like-function opcode (SLF) */
2488
2489static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2490static const CV *slf_cv;
2491static SV **slf_argv;
2492static int slf_argc, slf_arga; /* count, allocated */
2493static I32 slf_ax; /* top of stack, for restore */
2494
2495/* this restores the stack in the case we patched the entersub, to */
2496/* recreate the stack frame as perl will on following calls */
2497/* since entersub cleared the stack */
2498static OP *
2499pp_restore (pTHX)
2500{
2501 int i;
2502 SV **SP = PL_stack_base + slf_ax;
2503
2504 PUSHMARK (SP);
2505
2506 EXTEND (SP, slf_argc + 1);
2507
2508 for (i = 0; i < slf_argc; ++i)
2509 PUSHs (sv_2mortal (slf_argv [i]));
2510
2511 PUSHs ((SV *)CvGV (slf_cv));
2512
2513 RETURNOP (slf_restore.op_first);
2514}
2515
2516static void
2517slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2518{
2519 SV **arg = (SV **)slf_frame.data;
2520
2521 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2522}
2523
2524static void
2525slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (items != 2)
2528 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2529
2530 frame->prepare = slf_prepare_transfer;
2531 frame->check = slf_check_nop;
2532 frame->data = (void *)arg; /* let's hope it will stay valid */
2533}
2534
2535static void
2536slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 frame->prepare = prepare_schedule;
2539 frame->check = slf_check_nop;
2540}
2541
2542static void
2543slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2544{
2545 struct coro *next = (struct coro *)slf_frame.data;
2546
2547 SvREFCNT_inc_NN (next->hv);
2548 prepare_schedule_to (aTHX_ ta, next);
2549}
2550
2551static void
2552slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2553{
2554 if (!items)
2555 croak ("Coro::schedule_to expects a coroutine argument, caught");
2556
2557 frame->data = (void *)SvSTATE (arg [0]);
2558 frame->prepare = slf_prepare_schedule_to;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2564{
2565 api_ready (aTHX_ SvRV (coro_current));
2566
2567 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2568}
2569
2570static void
2571slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 frame->prepare = prepare_cede;
2574 frame->check = slf_check_nop;
2575}
2576
2577static void
2578slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2579{
2580 frame->prepare = prepare_cede_notself;
2581 frame->check = slf_check_nop;
2582}
2583
2584/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2585static void
2586slf_destroy (pTHX_ struct coro *coro)
2587{
2588 /* this callback is reserved for slf functions needing to do cleanup */
2589 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2590 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2591
2592 /*
2593 * The on_destroy above most likely is from an SLF call.
2594 * Since by definition the SLF call will not finish when we destroy
2595 * the coro, we will have to force-finish it here, otherwise
2596 * cleanup functions cannot call SLF functions.
2597 */
2598 coro->slf_frame.prepare = 0;
2599}
2600
2601/*
2602 * these not obviously related functions are all rolled into one
2603 * function to increase chances that they all will call transfer with the same
2604 * stack offset
2605 * SLF stands for "schedule-like-function".
2606 */
2607static OP *
2608pp_slf (pTHX)
2609{
2610 I32 checkmark; /* mark SP to see how many elements check has pushed */
2611
2612 /* set up the slf frame, unless it has already been set-up */
2613 /* the latter happens when a new coro has been started */
2614 /* or when a new cctx was attached to an existing coroutine */
2615 if (ecb_expect_true (!slf_frame.prepare))
2616 {
2617 /* first iteration */
2618 dSP;
2619 SV **arg = PL_stack_base + TOPMARK + 1;
2620 int items = SP - arg; /* args without function object */
2621 SV *gv = *sp;
2622
2623 /* do a quick consistency check on the "function" object, and if it isn't */
2624 /* for us, divert to the real entersub */
2625 if (SvTYPE (gv) != SVt_PVGV
2626 || !GvCV (gv)
2627 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2628 return PL_ppaddr[OP_ENTERSUB](aTHX);
2629
2630 if (!(PL_op->op_flags & OPf_STACKED))
2631 {
2632 /* ampersand-form of call, use @_ instead of stack */
2633 AV *av = GvAV (PL_defgv);
2634 arg = AvARRAY (av);
2635 items = AvFILLp (av) + 1;
2636 }
2637
2638 /* now call the init function, which needs to set up slf_frame */
2639 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2640 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2641
2642 /* pop args */
2643 SP = PL_stack_base + POPMARK;
2644
2645 PUTBACK;
2646 }
2647
2648 /* now that we have a slf_frame, interpret it! */
2649 /* we use a callback system not to make the code needlessly */
2650 /* complicated, but so we can run multiple perl coros from one cctx */
2651
2652 do
2653 {
2654 struct coro_transfer_args ta;
2655
2656 slf_frame.prepare (aTHX_ &ta);
2657 TRANSFER (ta, 0);
2658
2659 checkmark = PL_stack_sp - PL_stack_base;
2660 }
2661 while (slf_frame.check (aTHX_ &slf_frame));
2662
2663 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2664
2665 /* exception handling */
2666 if (ecb_expect_false (CORO_THROW))
2667 {
2668 SV *exception = sv_2mortal (CORO_THROW);
2669
2670 CORO_THROW = 0;
2671 sv_setsv (ERRSV, exception);
2672 croak (0);
2673 }
2674
2675 /* return value handling - mostly like entersub */
2676 /* make sure we put something on the stack in scalar context */
2677 if (GIMME_V == G_SCALAR
2678 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2679 {
2680 dSP;
2681 SV **bot = PL_stack_base + checkmark;
2682
2683 if (sp == bot) /* too few, push undef */
2684 bot [1] = &PL_sv_undef;
2685 else /* too many, take last one */
2686 bot [1] = *sp;
2687
2688 SP = bot + 1;
2689
2690 PUTBACK;
2691 }
2692
2693 return NORMAL;
2694}
2695
2696static void
2697api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2698{
2699 int i;
2700 SV **arg = PL_stack_base + ax;
2701 int items = PL_stack_sp - arg + 1;
2702
2703 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2704
2705 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2706 && PL_op->op_ppaddr != pp_slf)
2707 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2708
2709 CvFLAGS (cv) |= CVf_SLF;
2710 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2711 slf_cv = cv;
2712
2713 /* we patch the op, and then re-run the whole call */
2714 /* we have to put the same argument on the stack for this to work */
2715 /* and this will be done by pp_restore */
2716 slf_restore.op_next = (OP *)&slf_restore;
2717 slf_restore.op_type = OP_CUSTOM;
2718 slf_restore.op_ppaddr = pp_restore;
2719 slf_restore.op_first = PL_op;
2720
2721 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2722
2723 if (PL_op->op_flags & OPf_STACKED)
2724 {
2725 if (items > slf_arga)
2726 {
2727 slf_arga = items;
2728 Safefree (slf_argv);
2729 New (0, slf_argv, slf_arga, SV *);
2730 }
2731
2732 slf_argc = items;
2733
2734 for (i = 0; i < items; ++i)
2735 slf_argv [i] = SvREFCNT_inc (arg [i]);
2736 }
2737 else
2738 slf_argc = 0;
2739
2740 PL_op->op_ppaddr = pp_slf;
2741 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2742
2743 PL_op = (OP *)&slf_restore;
2744}
2745
2746/*****************************************************************************/
2747/* dynamic wind */
2748
2749static void
2750on_enterleave_call (pTHX_ SV *cb)
2751{
2752 dSP;
2753
2754 PUSHSTACK;
2755
2756 PUSHMARK (SP);
2757 PUTBACK;
2758 call_sv (cb, G_VOID | G_DISCARD);
2759 SPAGAIN;
2760
2761 POPSTACK;
2762}
2763
2764static SV *
2765coro_avp_pop_and_free (pTHX_ AV **avp)
2766{
2767 AV *av = *avp;
2768 SV *res = av_pop (av);
2769
2770 if (AvFILLp (av) < 0)
2771 {
2772 *avp = 0;
2773 SvREFCNT_dec (av);
2774 }
2775
2776 return res;
2777}
2778
2779static void
2780coro_pop_on_enter (pTHX_ void *coro)
2781{
2782 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2783 SvREFCNT_dec (cb);
2784}
2785
2786static void
2787coro_pop_on_leave (pTHX_ void *coro)
2788{
2789 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2790 on_enterleave_call (aTHX_ sv_2mortal (cb));
2791}
2792
2793/*****************************************************************************/
2794/* PerlIO::cede */
2795
2796typedef struct
2797{
2798 PerlIOBuf base;
2799 NV next, every;
2800} PerlIOCede;
2801
2802static IV ecb_cold
2803PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2804{
2805 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2806
2807 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2808 self->next = nvtime () + self->every;
2809
2810 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2811}
2812
2813static SV * ecb_cold
2814PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2815{
2816 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2817
2818 return newSVnv (self->every);
2819}
2820
2821static IV
2822PerlIOCede_flush (pTHX_ PerlIO *f)
2823{
2824 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2825 double now = nvtime ();
2826
2827 if (now >= self->next)
2828 {
2829 api_cede (aTHX);
2830 self->next = now + self->every;
2831 }
2832
2833 return PerlIOBuf_flush (aTHX_ f);
2834}
2835
2836static PerlIO_funcs PerlIO_cede =
2837{
2838 sizeof(PerlIO_funcs),
2839 "cede",
2840 sizeof(PerlIOCede),
2841 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2842 PerlIOCede_pushed,
2843 PerlIOBuf_popped,
2844 PerlIOBuf_open,
2845 PerlIOBase_binmode,
2846 PerlIOCede_getarg,
2847 PerlIOBase_fileno,
2848 PerlIOBuf_dup,
2849 PerlIOBuf_read,
2850 PerlIOBuf_unread,
2851 PerlIOBuf_write,
2852 PerlIOBuf_seek,
2853 PerlIOBuf_tell,
2854 PerlIOBuf_close,
2855 PerlIOCede_flush,
2856 PerlIOBuf_fill,
2857 PerlIOBase_eof,
2858 PerlIOBase_error,
2859 PerlIOBase_clearerr,
2860 PerlIOBase_setlinebuf,
2861 PerlIOBuf_get_base,
2862 PerlIOBuf_bufsiz,
2863 PerlIOBuf_get_ptr,
2864 PerlIOBuf_get_cnt,
2865 PerlIOBuf_set_ptrcnt,
2866};
2867
2868/*****************************************************************************/
2869/* Coro::Semaphore & Coro::Signal */
2870
2871static SV *
2872coro_waitarray_new (pTHX_ int count)
2873{
2874 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2875 AV *av = newAV ();
2876 SV **ary;
2877
2878 /* unfortunately, building manually saves memory */
2879 Newx (ary, 2, SV *);
2880 AvALLOC (av) = ary;
2881#if PERL_VERSION_ATLEAST (5,10,0)
2882 AvARRAY (av) = ary;
2883#else
2884 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2885 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2886 SvPVX ((SV *)av) = (char *)ary;
2887#endif
2888 AvMAX (av) = 1;
2889 AvFILLp (av) = 0;
2890 ary [0] = newSViv (count);
2891
2892 return newRV_noinc ((SV *)av);
2893}
2894
2895/* semaphore */
2896
2897static void
2898coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2899{
2900 SV *count_sv = AvARRAY (av)[0];
2901 IV count = SvIVX (count_sv);
2902
2903 count += adjust;
2904 SvIVX (count_sv) = count;
2905
2906 /* now wake up as many waiters as are expected to lock */
2907 while (count > 0 && AvFILLp (av) > 0)
2908 {
2909 SV *cb;
2910
2911 /* swap first two elements so we can shift a waiter */
2912 AvARRAY (av)[0] = AvARRAY (av)[1];
2913 AvARRAY (av)[1] = count_sv;
2914 cb = av_shift (av);
2915
2916 if (SvOBJECT (cb))
2917 {
2918 api_ready (aTHX_ cb);
2919 --count;
2920 }
2921 else if (SvTYPE (cb) == SVt_PVCV)
2922 {
2923 dSP;
2924 PUSHMARK (SP);
2925 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2926 PUTBACK;
2927 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2928 }
2929
2930 SvREFCNT_dec (cb);
2931 }
2932}
2933
2934static void
2935coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2936{
2937 /* call $sem->adjust (0) to possibly wake up some other waiters */
2938 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2939}
2940
2941static int
2942slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2943{
2944 AV *av = (AV *)frame->data;
2945 SV *count_sv = AvARRAY (av)[0];
2946 SV *coro_hv = SvRV (coro_current);
2947
2948 /* if we are about to throw, don't actually acquire the lock, just throw */
2949 if (CORO_THROW)
2950 return 0;
2951 else if (SvIVX (count_sv) > 0)
2952 {
2953 frame->destroy = 0;
2954
2955 if (acquire)
2956 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2957 else
2958 coro_semaphore_adjust (aTHX_ av, 0);
2959
2960 return 0;
2961 }
2962 else
2963 {
2964 int i;
2965 /* if we were woken up but can't down, we look through the whole */
2966 /* waiters list and only add us if we aren't in there already */
2967 /* this avoids some degenerate memory usage cases */
2968 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2969 if (AvARRAY (av)[i] == coro_hv)
2970 return 1;
2971
2972 av_push (av, SvREFCNT_inc (coro_hv));
2973 return 1;
2974 }
2975}
2976
2977static int
2978slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2979{
2980 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2981}
2982
2983static int
2984slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2985{
2986 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2987}
2988
2989static void
2990slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2991{
2992 AV *av = (AV *)SvRV (arg [0]);
2993
2994 if (SvIVX (AvARRAY (av)[0]) > 0)
2995 {
2996 frame->data = (void *)av;
2997 frame->prepare = prepare_nop;
2998 }
2999 else
3000 {
3001 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3002
3003 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3004 frame->prepare = prepare_schedule;
3005 /* to avoid race conditions when a woken-up coro gets terminated */
3006 /* we arrange for a temporary on_destroy that calls adjust (0) */
3007 frame->destroy = coro_semaphore_destroy;
3008 }
3009}
3010
3011static void
3012slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3013{
3014 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3015 frame->check = slf_check_semaphore_down;
3016}
3017
3018static void
3019slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3020{
3021 if (items >= 2)
3022 {
3023 /* callback form */
3024 AV *av = (AV *)SvRV (arg [0]);
3025 SV *cb_cv = s_get_cv_croak (arg [1]);
3026
3027 av_push (av, SvREFCNT_inc_NN (cb_cv));
3028
3029 if (SvIVX (AvARRAY (av)[0]) > 0)
3030 coro_semaphore_adjust (aTHX_ av, 0);
3031
3032 frame->prepare = prepare_nop;
3033 frame->check = slf_check_nop;
3034 }
3035 else
3036 {
3037 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3038 frame->check = slf_check_semaphore_wait;
3039 }
3040}
3041
3042/* signal */
3043
3044static void
3045coro_signal_wake (pTHX_ AV *av, int count)
3046{
3047 SvIVX (AvARRAY (av)[0]) = 0;
3048
3049 /* now signal count waiters */
3050 while (count > 0 && AvFILLp (av) > 0)
3051 {
3052 SV *cb;
3053
3054 /* swap first two elements so we can shift a waiter */
3055 cb = AvARRAY (av)[0];
3056 AvARRAY (av)[0] = AvARRAY (av)[1];
3057 AvARRAY (av)[1] = cb;
3058
3059 cb = av_shift (av);
3060
3061 if (SvTYPE (cb) == SVt_PVCV)
3062 {
3063 dSP;
3064 PUSHMARK (SP);
3065 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3066 PUTBACK;
3067 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3068 }
3069 else
3070 {
3071 api_ready (aTHX_ cb);
3072 sv_setiv (cb, 0); /* signal waiter */
3073 }
3074
3075 SvREFCNT_dec (cb);
3076
3077 --count;
3078 }
3079}
3080
3081static int
3082slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3083{
3084 /* if we are about to throw, also stop waiting */
3085 return SvROK ((SV *)frame->data) && !CORO_THROW;
3086}
3087
3088static void
3089slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3090{
3091 AV *av = (AV *)SvRV (arg [0]);
3092
3093 if (items >= 2)
3094 {
3095 SV *cb_cv = s_get_cv_croak (arg [1]);
3096 av_push (av, SvREFCNT_inc_NN (cb_cv));
3097
3098 if (SvIVX (AvARRAY (av)[0]))
3099 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3100
3101 frame->prepare = prepare_nop;
3102 frame->check = slf_check_nop;
3103 }
3104 else if (SvIVX (AvARRAY (av)[0]))
3105 {
3106 SvIVX (AvARRAY (av)[0]) = 0;
3107 frame->prepare = prepare_nop;
3108 frame->check = slf_check_nop;
3109 }
3110 else
3111 {
3112 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3113
3114 av_push (av, waiter);
3115
3116 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3117 frame->prepare = prepare_schedule;
3118 frame->check = slf_check_signal_wait;
3119 }
3120}
3121
3122/*****************************************************************************/
3123/* Coro::AIO */
3124
3125#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3126
3127/* helper storage struct */
3128struct io_state
3129{
3130 int errorno;
3131 I32 laststype; /* U16 in 5.10.0 */
3132 int laststatval;
3133 Stat_t statcache;
3134};
3135
3136static void
3137coro_aio_callback (pTHX_ CV *cv)
3138{
3139 dXSARGS;
3140 AV *state = (AV *)S_GENSUB_ARG;
3141 SV *coro = av_pop (state);
3142 SV *data_sv = newSV (sizeof (struct io_state));
3143
3144 av_extend (state, items - 1);
3145
3146 sv_upgrade (data_sv, SVt_PV);
3147 SvCUR_set (data_sv, sizeof (struct io_state));
3148 SvPOK_only (data_sv);
3149
3150 {
3151 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3152
3153 data->errorno = errno;
3154 data->laststype = PL_laststype;
3155 data->laststatval = PL_laststatval;
3156 data->statcache = PL_statcache;
3157 }
3158
3159 /* now build the result vector out of all the parameters and the data_sv */
3160 {
3161 int i;
3162
3163 for (i = 0; i < items; ++i)
3164 av_push (state, SvREFCNT_inc_NN (ST (i)));
3165 }
3166
3167 av_push (state, data_sv);
3168
3169 api_ready (aTHX_ coro);
3170 SvREFCNT_dec (coro);
3171 SvREFCNT_dec ((AV *)state);
3172}
3173
3174static int
3175slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3176{
3177 AV *state = (AV *)frame->data;
3178
3179 /* if we are about to throw, return early */
3180 /* this does not cancel the aio request, but at least */
3181 /* it quickly returns */
3182 if (CORO_THROW)
3183 return 0;
3184
3185 /* one element that is an RV? repeat! */
3186 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3187 return 1;
3188
3189 /* restore status */
3190 {
3191 SV *data_sv = av_pop (state);
3192 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3193
3194 errno = data->errorno;
3195 PL_laststype = data->laststype;
3196 PL_laststatval = data->laststatval;
3197 PL_statcache = data->statcache;
3198
3199 SvREFCNT_dec (data_sv);
3200 }
3201
3202 /* push result values */
3203 {
3204 dSP;
3205 int i;
3206
3207 EXTEND (SP, AvFILLp (state) + 1);
3208 for (i = 0; i <= AvFILLp (state); ++i)
3209 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3210
3211 PUTBACK;
3212 }
3213
3214 return 0;
3215}
3216
3217static void
3218slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3219{
3220 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3221 SV *coro_hv = SvRV (coro_current);
3222 struct coro *coro = SvSTATE_hv (coro_hv);
3223
3224 /* put our coroutine id on the state arg */
3225 av_push (state, SvREFCNT_inc_NN (coro_hv));
3226
3227 /* first see whether we have a non-zero priority and set it as AIO prio */
3228 if (coro->prio)
3229 {
3230 dSP;
3231
3232 static SV *prio_cv;
3233 static SV *prio_sv;
3234
3235 if (ecb_expect_false (!prio_cv))
3236 {
3237 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3238 prio_sv = newSViv (0);
3239 }
3240
3241 PUSHMARK (SP);
3242 sv_setiv (prio_sv, coro->prio);
3243 XPUSHs (prio_sv);
3244
3245 PUTBACK;
3246 call_sv (prio_cv, G_VOID | G_DISCARD);
3247 }
3248
3249 /* now call the original request */
3250 {
3251 dSP;
3252 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3253 int i;
3254
3255 PUSHMARK (SP);
3256
3257 /* first push all args to the stack */
3258 EXTEND (SP, items + 1);
3259
3260 for (i = 0; i < items; ++i)
3261 PUSHs (arg [i]);
3262
3263 /* now push the callback closure */
3264 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3265
3266 /* now call the AIO function - we assume our request is uncancelable */
3267 PUTBACK;
3268 call_sv ((SV *)req, G_VOID | G_DISCARD);
3269 }
3270
3271 /* now that the request is going, we loop till we have a result */
3272 frame->data = (void *)state;
3273 frame->prepare = prepare_schedule;
3274 frame->check = slf_check_aio_req;
3275}
3276
3277static void
3278coro_aio_req_xs (pTHX_ CV *cv)
3279{
3280 dXSARGS;
3281
3282 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3283
3284 XSRETURN_EMPTY;
3285}
3286
3287/*****************************************************************************/
3288
3289#if CORO_CLONE
3290# include "clone.c"
3291#endif
3292
3293/*****************************************************************************/
3294
3295static SV *
3296coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3297{
3298 SV *coro_sv;
3299 struct coro *coro;
3300 MAGIC *mg;
3301 HV *hv;
3302 SV *cb;
3303 int i;
3304
3305 if (argc > 0)
3306 {
3307 cb = s_get_cv_croak (argv [0]);
3308
3309 if (!is_coro)
3310 {
3311 if (CvISXSUB (cb))
3312 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3313
3314 if (!CvROOT (cb))
3315 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3316 }
3317 }
3318
3319 Newz (0, coro, 1, struct coro);
3320 coro->args = newAV ();
3321 coro->flags = CF_NEW;
3322
3323 if (coro_first) coro_first->prev = coro;
3324 coro->next = coro_first;
3325 coro_first = coro;
3326
3327 coro->hv = hv = newHV ();
3328 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3329 mg->mg_flags |= MGf_DUP;
3330 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3331
3332 if (argc > 0)
3333 {
3334 av_extend (coro->args, argc + is_coro - 1);
3335
3336 if (is_coro)
3337 {
3338 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3339 cb = (SV *)cv_coro_run;
3340 }
3341
3342 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3343
3344 for (i = 1; i < argc; i++)
3345 av_push (coro->args, newSVsv (argv [i]));
3346 }
3347
3348 return coro_sv;
3349}
3350
3351#ifndef __cplusplus
3352ecb_cold XS(boot_Coro__State);
3353#endif
3354
3355#if CORO_JIT
3356
3357static void ecb_noinline ecb_cold
3358pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3359{
3360 dSP;
3361 AV *av = newAV ();
3362
3363 av_store (av, 3, newSVuv (d));
3364 av_store (av, 2, newSVuv (c));
3365 av_store (av, 1, newSVuv (b));
3366 av_store (av, 0, newSVuv (a));
3367
3368 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3369
3370 PUTBACK;
3371}
3372
3373static void ecb_noinline ecb_cold
3374jit_init (pTHX)
3375{
3376 dSP;
3377 SV *load, *save;
3378 char *map_base;
3379 char *load_ptr, *save_ptr;
3380 STRLEN load_len, save_len, map_len;
3381 int count;
3382
3383 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3384
3385 PUSHMARK (SP);
3386#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3387# include "state.h"
3388#undef VARx
3389 count = call_pv ("Coro::State::_jit", G_ARRAY);
3390 SPAGAIN;
3391
3392 save = POPs; save_ptr = SvPVbyte (save, save_len);
3393 load = POPs; load_ptr = SvPVbyte (load, load_len);
3394
3395 map_len = load_len + save_len + 16;
3396
3397 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3398
3399 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3400
3401 load_perl_slots = (load_save_perl_slots_type)map_base;
3402 memcpy (map_base, load_ptr, load_len);
3403
3404 map_base += (load_len + 15) & ~15;
3405
3406 save_perl_slots = (load_save_perl_slots_type)map_base;
3407 memcpy (map_base, save_ptr, save_len);
3408
3409 /* we are good citizens and try to make the page read-only, so the evil evil */
3410 /* hackers might have it a bit more difficult */
3411 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3412
3413 PUTBACK;
3414 eval_pv ("undef &Coro::State::_jit", 1);
3415}
3416
3417#endif
1384 3418
1385MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3419MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1386 3420
1387PROTOTYPES: DISABLE 3421PROTOTYPES: DISABLE
1388 3422
1389BOOT: 3423BOOT:
1390{ 3424{
1391#ifdef USE_ITHREADS 3425#ifdef USE_ITHREADS
1392 MUTEX_INIT (&coro_mutex); 3426# if CORO_PTHREAD
3427 coro_thx = PERL_GET_CONTEXT;
3428# endif
1393#endif 3429#endif
1394 BOOT_PAGESIZE; 3430 BOOT_PAGESIZE;
3431
3432 /* perl defines these to check for existance first, but why it doesn't */
3433 /* just create them one at init time is not clear to me, except for */
3434 /* programs trying to delete them, but... */
3435 /* anyway, we declare this as invalid and make sure they are initialised here */
3436 DEFSV;
3437 ERRSV;
3438
3439 cctx_current = cctx_new_empty ();
3440
3441 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3442 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3443
3444 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3445 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3446 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3447
3448 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3449 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3450 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1395 3451
1396 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3452 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1397 3453
1398 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3454 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1399 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3455 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1400 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); 3456 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1401 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); 3457 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1402 3458
1403 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1404 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1405 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1406 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1407 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1408 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1409 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1410
1411 main_mainstack = PL_mainstack; 3459 main_mainstack = PL_mainstack;
1412 main_top_env = PL_top_env; 3460 main_top_env = PL_top_env;
1413 3461
1414 while (main_top_env->je_prev) 3462 while (main_top_env->je_prev)
1415 main_top_env = main_top_env->je_prev; 3463 main_top_env = main_top_env->je_prev;
1416 3464
3465 {
3466 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3467
3468 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3469 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3470
3471 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3472 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3473 }
3474
1417 coroapi.ver = CORO_API_VERSION; 3475 coroapi.ver = CORO_API_VERSION;
3476 coroapi.rev = CORO_API_REVISION;
3477
1418 coroapi.transfer = api_transfer; 3478 coroapi.transfer = api_transfer;
1419 3479
3480 coroapi.sv_state = SvSTATE_;
3481 coroapi.execute_slf = api_execute_slf;
3482 coroapi.prepare_nop = prepare_nop;
3483 coroapi.prepare_schedule = prepare_schedule;
3484 coroapi.prepare_cede = prepare_cede;
3485 coroapi.prepare_cede_notself = prepare_cede_notself;
3486
3487 time_init (aTHX);
3488
1420 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3489 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3490#if CORO_JIT
3491 PUTBACK;
3492 jit_init (aTHX);
3493 SPAGAIN;
3494#endif
1421} 3495}
1422 3496
1423SV * 3497SV *
1424new (char *klass, ...) 3498new (SV *klass, ...)
3499 ALIAS:
3500 Coro::new = 1
1425 CODE: 3501 CODE:
1426{ 3502 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1427 struct coro *coro;
1428 HV *hv;
1429 int i;
1430
1431 Newz (0, coro, 1, struct coro);
1432 coro->args = newAV ();
1433 coro->save = CORO_SAVE_DEF;
1434 coro->flags = CF_NEW;
1435
1436 if (coro_first) coro_first->prev = coro;
1437 coro->next = coro_first;
1438 coro_first = coro;
1439
1440 coro->hv = hv = newHV ();
1441 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1442 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1443
1444 for (i = 1; i < items; i++)
1445 av_push (coro->args, newSVsv (ST (i)));
1446}
1447 OUTPUT:
1448 RETVAL
1449
1450int
1451save (SV *coro, int new_save = -1)
1452 CODE:
1453 RETVAL = api_save (coro, new_save);
1454 OUTPUT: 3503 OUTPUT:
1455 RETVAL 3504 RETVAL
1456 3505
1457int 3506void
1458save_also (SV *coro_sv, int save_also) 3507transfer (...)
3508 PROTOTYPE: $$
1459 CODE: 3509 CODE:
1460{ 3510 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1461 struct coro *coro = SvSTATE (coro_sv);
1462 RETVAL = coro->save;
1463 coro->save |= save_also;
1464}
1465 OUTPUT:
1466 RETVAL
1467 3511
1468# these not obviously related functions are all rolled into the same xs
1469# function to increase chances that they all will call transfer with the same
1470# stack offset
1471void 3512void
1472_set_stacklevel (...)
1473 ALIAS:
1474 Coro::State::transfer = 1
1475 Coro::schedule = 2
1476 Coro::cede = 3
1477 Coro::cede_notself = 4
1478 CODE:
1479{
1480 struct transfer_args ta;
1481
1482 switch (ix)
1483 {
1484 case 0:
1485 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1486 ta.next = 0;
1487 break;
1488
1489 case 1:
1490 if (items != 2)
1491 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1492
1493 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1494 break;
1495
1496 case 2:
1497 prepare_schedule (aTHX_ &ta);
1498 break;
1499
1500 case 3:
1501 prepare_cede (aTHX_ &ta);
1502 break;
1503
1504 case 4:
1505 if (!prepare_cede_notself (aTHX_ &ta))
1506 XSRETURN_EMPTY;
1507
1508 break;
1509 }
1510
1511 BARRIER;
1512 TRANSFER (ta);
1513
1514 if (GIMME_V != G_VOID && ta.next != ta.prev)
1515 XSRETURN_YES;
1516}
1517
1518bool
1519_destroy (SV *coro_sv)
1520 CODE:
1521 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1522 OUTPUT:
1523 RETVAL
1524
1525void
1526_exit (code) 3513_exit (int code)
1527 int code
1528 PROTOTYPE: $ 3514 PROTOTYPE: $
1529 CODE: 3515 CODE:
1530 _exit (code); 3516 _exit (code);
1531 3517
3518SV *
3519clone (Coro::State coro)
3520 CODE:
3521{
3522#if CORO_CLONE
3523 struct coro *ncoro = coro_clone (aTHX_ coro);
3524 MAGIC *mg;
3525 /* TODO: too much duplication */
3526 ncoro->hv = newHV ();
3527 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3528 mg->mg_flags |= MGf_DUP;
3529 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3530#else
3531 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3532#endif
3533}
3534 OUTPUT:
3535 RETVAL
3536
1532int 3537int
1533cctx_stacksize (int new_stacksize = 0) 3538cctx_stacksize (int new_stacksize = 0)
3539 PROTOTYPE: ;$
1534 CODE: 3540 CODE:
1535 RETVAL = coro_stacksize; 3541 RETVAL = cctx_stacksize;
1536 if (new_stacksize) 3542 if (new_stacksize)
3543 {
1537 coro_stacksize = new_stacksize; 3544 cctx_stacksize = new_stacksize;
3545 ++cctx_gen;
3546 }
1538 OUTPUT: 3547 OUTPUT:
1539 RETVAL 3548 RETVAL
1540 3549
1541int 3550int
3551cctx_max_idle (int max_idle = 0)
3552 PROTOTYPE: ;$
3553 CODE:
3554 RETVAL = cctx_max_idle;
3555 if (max_idle > 1)
3556 cctx_max_idle = max_idle;
3557 OUTPUT:
3558 RETVAL
3559
3560int
1542cctx_count () 3561cctx_count ()
3562 PROTOTYPE:
1543 CODE: 3563 CODE:
1544 RETVAL = cctx_count; 3564 RETVAL = cctx_count;
1545 OUTPUT: 3565 OUTPUT:
1546 RETVAL 3566 RETVAL
1547 3567
1548int 3568int
1549cctx_idle () 3569cctx_idle ()
3570 PROTOTYPE:
1550 CODE: 3571 CODE:
1551 RETVAL = cctx_idle; 3572 RETVAL = cctx_idle;
1552 OUTPUT: 3573 OUTPUT:
1553 RETVAL 3574 RETVAL
1554 3575
1555void 3576void
1556list () 3577list ()
3578 PROTOTYPE:
1557 PPCODE: 3579 PPCODE:
1558{ 3580{
1559 struct coro *coro; 3581 struct coro *coro;
1560 for (coro = coro_first; coro; coro = coro->next) 3582 for (coro = coro_first; coro; coro = coro->next)
1561 if (coro->hv) 3583 if (coro->hv)
… …
1566call (Coro::State coro, SV *coderef) 3588call (Coro::State coro, SV *coderef)
1567 ALIAS: 3589 ALIAS:
1568 eval = 1 3590 eval = 1
1569 CODE: 3591 CODE:
1570{ 3592{
1571 if (coro->mainstack) 3593 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1572 { 3594 {
1573 struct coro temp; 3595 struct coro *current = SvSTATE_current;
1574 Zero (&temp, 1, struct coro); 3596 struct CoroSLF slf_save;
1575 temp.save = CORO_SAVE_ALL;
1576 3597
1577 if (!(coro->flags & CF_RUNNING)) 3598 if (current != coro)
1578 { 3599 {
3600 PUTBACK;
1579 save_perl (aTHX_ &temp); 3601 save_perl (aTHX_ current);
1580 load_perl (aTHX_ coro); 3602 load_perl (aTHX_ coro);
3603 /* the coro is most likely in an active SLF call.
3604 * while not strictly required (the code we execute is
3605 * not allowed to call any SLF functions), it's cleaner
3606 * to reinitialise the slf_frame and restore it later.
3607 * This might one day allow us to actually do SLF calls
3608 * from code executed here.
3609 */
3610 slf_save = slf_frame;
3611 slf_frame.prepare = 0;
3612 SPAGAIN;
1581 } 3613 }
1582 3614
1583 { 3615 PUSHSTACK;
1584 dSP; 3616
1585 ENTER;
1586 SAVETMPS;
1587 PUSHMARK (SP); 3617 PUSHMARK (SP);
1588 PUTBACK; 3618 PUTBACK;
3619
1589 if (ix) 3620 if (ix)
1590 eval_sv (coderef, 0); 3621 eval_sv (coderef, 0);
1591 else 3622 else
1592 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3623 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3624
3625 POPSTACK;
1593 SPAGAIN; 3626 SPAGAIN;
1594 FREETMPS;
1595 LEAVE;
1596 PUTBACK;
1597 }
1598 3627
1599 if (!(coro->flags & CF_RUNNING)) 3628 if (current != coro)
1600 { 3629 {
3630 PUTBACK;
3631 slf_frame = slf_save;
1601 save_perl (aTHX_ coro); 3632 save_perl (aTHX_ coro);
1602 load_perl (aTHX_ &temp); 3633 load_perl (aTHX_ current);
3634 SPAGAIN;
1603 } 3635 }
1604 } 3636 }
1605} 3637}
1606 3638
1607SV * 3639SV *
… …
1609 PROTOTYPE: $ 3641 PROTOTYPE: $
1610 ALIAS: 3642 ALIAS:
1611 is_ready = CF_READY 3643 is_ready = CF_READY
1612 is_running = CF_RUNNING 3644 is_running = CF_RUNNING
1613 is_new = CF_NEW 3645 is_new = CF_NEW
1614 is_destroyed = CF_DESTROYED 3646 is_destroyed = CF_ZOMBIE
3647 is_zombie = CF_ZOMBIE
3648 is_suspended = CF_SUSPENDED
1615 CODE: 3649 CODE:
1616 RETVAL = boolSV (coro->flags & ix); 3650 RETVAL = boolSV (coro->flags & ix);
1617 OUTPUT: 3651 OUTPUT:
1618 RETVAL 3652 RETVAL
1619 3653
1620void 3654void
3655throw (Coro::State self, SV *exception = &PL_sv_undef)
3656 PROTOTYPE: $;$
3657 CODE:
3658{
3659 struct coro *current = SvSTATE_current;
3660 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3661 SvREFCNT_dec (*exceptionp);
3662 SvGETMAGIC (exception);
3663 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3664}
3665
3666void
1621api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3667api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3668 PROTOTYPE: $;$
3669 C_ARGS: aTHX_ coro, flags
1622 3670
1623SV * 3671SV *
1624has_stack (Coro::State coro) 3672has_cctx (Coro::State coro)
1625 PROTOTYPE: $ 3673 PROTOTYPE: $
1626 CODE: 3674 CODE:
1627 RETVAL = boolSV (!!coro->cctx); 3675 /* maybe manage the running flag differently */
3676 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1628 OUTPUT: 3677 OUTPUT:
1629 RETVAL 3678 RETVAL
1630 3679
1631int 3680int
1632is_traced (Coro::State coro) 3681is_traced (Coro::State coro)
… …
1634 CODE: 3683 CODE:
1635 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3684 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1636 OUTPUT: 3685 OUTPUT:
1637 RETVAL 3686 RETVAL
1638 3687
1639IV 3688UV
1640rss (Coro::State coro) 3689rss (Coro::State coro)
1641 PROTOTYPE: $ 3690 PROTOTYPE: $
1642 ALIAS: 3691 ALIAS:
1643 usecount = 1 3692 usecount = 1
1644 CODE: 3693 CODE:
… …
1648 case 1: RETVAL = coro->usecount; break; 3697 case 1: RETVAL = coro->usecount; break;
1649 } 3698 }
1650 OUTPUT: 3699 OUTPUT:
1651 RETVAL 3700 RETVAL
1652 3701
3702void
3703force_cctx ()
3704 PROTOTYPE:
3705 CODE:
3706 cctx_current->idle_sp = 0;
3707
3708void
3709swap_defsv (Coro::State self)
3710 PROTOTYPE: $
3711 ALIAS:
3712 swap_defav = 1
3713 CODE:
3714 if (!self->slot)
3715 croak ("cannot swap state with coroutine that has no saved state,");
3716 else
3717 {
3718 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3719 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3720
3721 SV *tmp = *src; *src = *dst; *dst = tmp;
3722 }
3723
3724void
3725cancel (Coro::State self)
3726 CODE:
3727 coro_state_destroy (aTHX_ self);
3728
3729SV *
3730enable_times (int enabled = enable_times)
3731 CODE:
3732{
3733 RETVAL = boolSV (enable_times);
3734
3735 if (enabled != enable_times)
3736 {
3737 enable_times = enabled;
3738
3739 coro_times_update ();
3740 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3741 }
3742}
3743 OUTPUT:
3744 RETVAL
3745
3746void
3747times (Coro::State self)
3748 PPCODE:
3749{
3750 struct coro *current = SvSTATE (coro_current);
3751
3752 if (ecb_expect_false (current == self))
3753 {
3754 coro_times_update ();
3755 coro_times_add (SvSTATE (coro_current));
3756 }
3757
3758 EXTEND (SP, 2);
3759 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3760 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3761
3762 if (ecb_expect_false (current == self))
3763 coro_times_sub (SvSTATE (coro_current));
3764}
3765
3766void
3767swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3768 CODE:
3769{
3770 struct coro *current = SvSTATE_current;
3771
3772 if (current == coro)
3773 SWAP_SVS (current);
3774
3775 if (!coro->swap_sv)
3776 coro->swap_sv = newAV ();
3777
3778 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3779 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3780
3781 if (current == coro)
3782 SWAP_SVS (current);
3783}
3784
1653 3785
1654MODULE = Coro::State PACKAGE = Coro 3786MODULE = Coro::State PACKAGE = Coro
1655 3787
1656BOOT: 3788BOOT:
1657{ 3789{
1658 int i;
1659
1660 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3790 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1661 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3791 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3792 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3793 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1662 av_async_pool = get_av ("Coro::async_pool", TRUE); 3794 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3795 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3796 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3797 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1663 3798
1664 coro_current = get_sv ("Coro::current", FALSE); 3799 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1665 SvREADONLY_on (coro_current); 3800 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1666 3801 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3802 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3803
1667 coro_stash = gv_stashpv ("Coro", TRUE); 3804 coro_stash = gv_stashpv ("Coro", TRUE);
1668 3805
1669 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3806 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1670 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3807 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1671 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3808 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1672 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3809 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1673 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3810 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1674 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3811 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1675
1676 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1677 coro_ready[i] = newAV ();
1678 3812
1679 { 3813 {
1680 SV *sv = perl_get_sv("Coro::API", 1); 3814 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1681 3815
1682 coroapi.schedule = api_schedule; 3816 coroapi.schedule = api_schedule;
1683 coroapi.save = api_save; 3817 coroapi.schedule_to = api_schedule_to;
1684 coroapi.cede = api_cede; 3818 coroapi.cede = api_cede;
1685 coroapi.cede_notself = api_cede_notself; 3819 coroapi.cede_notself = api_cede_notself;
1686 coroapi.ready = api_ready; 3820 coroapi.ready = api_ready;
1687 coroapi.is_ready = api_is_ready; 3821 coroapi.is_ready = api_is_ready;
1688 coroapi.nready = &coro_nready; 3822 coroapi.nready = coro_nready;
1689 coroapi.current = coro_current; 3823 coroapi.current = coro_current;
1690 3824
1691 GCoroAPI = &coroapi; 3825 /*GCoroAPI = &coroapi;*/
1692 sv_setiv (sv, (IV)&coroapi); 3826 sv_setiv (sv, (IV)&coroapi);
1693 SvREADONLY_on (sv); 3827 SvREADONLY_on (sv);
1694 } 3828 }
1695} 3829}
3830
3831SV *
3832async (...)
3833 PROTOTYPE: &@
3834 CODE:
3835 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3836 api_ready (aTHX_ RETVAL);
3837 OUTPUT:
3838 RETVAL
3839
3840void
3841_destroy (Coro::State coro)
3842 CODE:
3843 /* used by the manager thread */
3844 coro_state_destroy (aTHX_ coro);
3845
3846void
3847on_destroy (Coro::State coro, SV *cb)
3848 CODE:
3849 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3850
3851void
3852join (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_join);
3855
3856void
3857terminate (...)
3858 CODE:
3859 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3860
3861void
3862cancel (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3865
3866int
3867safe_cancel (Coro::State self, ...)
3868 C_ARGS: aTHX_ self, &ST (1), items - 1
3869
3870void
3871schedule (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3874
3875void
3876schedule_to (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3879
3880void
3881cede_to (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3884
3885void
3886cede (...)
3887 CODE:
3888 CORO_EXECUTE_SLF_XS (slf_init_cede);
3889
3890void
3891cede_notself (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1696 3894
1697void 3895void
1698_set_current (SV *current) 3896_set_current (SV *current)
1699 PROTOTYPE: $ 3897 PROTOTYPE: $
1700 CODE: 3898 CODE:
1701 SvREFCNT_dec (SvRV (coro_current)); 3899 SvREFCNT_dec (SvRV (coro_current));
1702 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3900 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3901
3902void
3903_set_readyhook (SV *hook)
3904 PROTOTYPE: $
3905 CODE:
3906 SvREFCNT_dec (coro_readyhook);
3907 SvGETMAGIC (hook);
3908 if (SvOK (hook))
3909 {
3910 coro_readyhook = newSVsv (hook);
3911 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3912 }
3913 else
3914 {
3915 coro_readyhook = 0;
3916 CORO_READYHOOK = 0;
3917 }
1703 3918
1704int 3919int
1705prio (Coro::State coro, int newprio = 0) 3920prio (Coro::State coro, int newprio = 0)
3921 PROTOTYPE: $;$
1706 ALIAS: 3922 ALIAS:
1707 nice = 1 3923 nice = 1
1708 CODE: 3924 CODE:
1709{ 3925{
1710 RETVAL = coro->prio; 3926 RETVAL = coro->prio;
… …
1712 if (items > 1) 3928 if (items > 1)
1713 { 3929 {
1714 if (ix) 3930 if (ix)
1715 newprio = coro->prio - newprio; 3931 newprio = coro->prio - newprio;
1716 3932
1717 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3933 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1718 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3934 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1719 3935
1720 coro->prio = newprio; 3936 coro->prio = newprio;
1721 } 3937 }
1722} 3938}
1723 OUTPUT: 3939 OUTPUT:
… …
1725 3941
1726SV * 3942SV *
1727ready (SV *self) 3943ready (SV *self)
1728 PROTOTYPE: $ 3944 PROTOTYPE: $
1729 CODE: 3945 CODE:
1730 RETVAL = boolSV (api_ready (self)); 3946 RETVAL = boolSV (api_ready (aTHX_ self));
1731 OUTPUT: 3947 OUTPUT:
1732 RETVAL 3948 RETVAL
1733 3949
1734int 3950int
1735nready (...) 3951nready (...)
… …
1737 CODE: 3953 CODE:
1738 RETVAL = coro_nready; 3954 RETVAL = coro_nready;
1739 OUTPUT: 3955 OUTPUT:
1740 RETVAL 3956 RETVAL
1741 3957
1742# for async_pool speedup
1743void 3958void
1744_pool_1 (SV *cb) 3959suspend (Coro::State self)
3960 PROTOTYPE: $
1745 CODE: 3961 CODE:
1746{ 3962 self->flags |= CF_SUSPENDED;
1747 int i, len;
1748 HV *hv = (HV *)SvRV (coro_current);
1749 AV *defav = GvAV (PL_defgv);
1750 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1751 AV *invoke_av;
1752 3963
1753 if (!invoke) 3964void
1754 croak ("\3terminate\2\n"); 3965resume (Coro::State self)
3966 PROTOTYPE: $
3967 CODE:
3968 self->flags &= ~CF_SUSPENDED;
1755 3969
1756 hv_store (hv, "desc", sizeof ("desc") - 1, 3970void
1757 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3971_pool_handler (...)
3972 CODE:
3973 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1758 3974
1759 invoke_av = (AV *)SvRV (invoke); 3975void
1760 len = av_len (invoke_av); 3976async_pool (SV *cv, ...)
3977 PROTOTYPE: &@
3978 PPCODE:
3979{
3980 HV *hv = (HV *)av_pop (av_async_pool);
3981 AV *av = newAV ();
3982 SV *cb = ST (0);
3983 int i;
1761 3984
1762 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3985 av_extend (av, items - 2);
3986 for (i = 1; i < items; ++i)
3987 av_push (av, SvREFCNT_inc_NN (ST (i)));
1763 3988
1764 if (len > 0) 3989 if ((SV *)hv == &PL_sv_undef)
1765 { 3990 {
1766 av_fill (defav, len - 1); 3991 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1767 for (i = 0; i < len; ++i) 3992 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1768 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3993 SvREFCNT_dec (sv);
1769 } 3994 }
1770 3995
3996 {
3997 struct coro *coro = SvSTATE_hv (hv);
3998
3999 assert (!coro->invoke_cb);
4000 assert (!coro->invoke_av);
4001 coro->invoke_cb = SvREFCNT_inc (cb);
4002 coro->invoke_av = av;
4003 }
4004
4005 api_ready (aTHX_ (SV *)hv);
4006
4007 if (GIMME_V != G_VOID)
4008 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4009 else
1771 SvREFCNT_dec (invoke); 4010 SvREFCNT_dec (hv);
1772} 4011}
1773 4012
1774void 4013SV *
1775_pool_2 (SV *cb) 4014rouse_cb ()
4015 PROTOTYPE:
1776 CODE: 4016 CODE:
1777{ 4017 RETVAL = coro_new_rouse_cb (aTHX);
1778 struct coro *coro = SvSTATE (coro_current);
1779
1780 sv_setsv (cb, &PL_sv_undef);
1781
1782 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1783 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1784 croak ("\3terminate\2\n");
1785
1786 av_clear (GvAV (PL_defgv));
1787 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1788 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1789
1790 coro->save = CORO_SAVE_DEF;
1791 coro->prio = 0;
1792
1793 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1794 api_trace (coro_current, 0);
1795
1796 av_push (av_async_pool, newSVsv (coro_current));
1797}
1798
1799
1800MODULE = Coro::State PACKAGE = Coro::AIO
1801
1802SV *
1803_get_state ()
1804 CODE:
1805{
1806 struct io_state *data;
1807
1808 RETVAL = newSV (sizeof (struct io_state));
1809 data = (struct io_state *)SvPVX (RETVAL);
1810 SvCUR_set (RETVAL, sizeof (struct io_state));
1811 SvPOK_only (RETVAL);
1812
1813 data->errorno = errno;
1814 data->laststype = PL_laststype;
1815 data->laststatval = PL_laststatval;
1816 data->statcache = PL_statcache;
1817}
1818 OUTPUT: 4018 OUTPUT:
1819 RETVAL 4019 RETVAL
1820 4020
1821void 4021void
1822_set_state (char *data_) 4022rouse_wait (...)
4023 PROTOTYPE: ;$
4024 PPCODE:
4025 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4026
4027void
4028on_enter (SV *block)
4029 ALIAS:
4030 on_leave = 1
1823 PROTOTYPE: $ 4031 PROTOTYPE: &
1824 CODE: 4032 CODE:
1825{ 4033{
1826 struct io_state *data = (void *)data_; 4034 struct coro *coro = SvSTATE_current;
4035 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1827 4036
1828 errno = data->errorno; 4037 block = s_get_cv_croak (block);
1829 PL_laststype = data->laststype;
1830 PL_laststatval = data->laststatval;
1831 PL_statcache = data->statcache;
1832}
1833 4038
4039 if (!*avp)
4040 *avp = newAV ();
4041
4042 av_push (*avp, SvREFCNT_inc (block));
4043
4044 if (!ix)
4045 on_enterleave_call (aTHX_ block);
4046
4047 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4048 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4049 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4050}
4051
4052
4053MODULE = Coro::State PACKAGE = PerlIO::cede
4054
4055BOOT:
4056 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4057
4058
4059MODULE = Coro::State PACKAGE = Coro::Semaphore
4060
4061SV *
4062new (SV *klass, SV *count = 0)
4063 CODE:
4064{
4065 int semcnt = 1;
4066
4067 if (count)
4068 {
4069 SvGETMAGIC (count);
4070
4071 if (SvOK (count))
4072 semcnt = SvIV (count);
4073 }
4074
4075 RETVAL = sv_bless (
4076 coro_waitarray_new (aTHX_ semcnt),
4077 GvSTASH (CvGV (cv))
4078 );
4079}
4080 OUTPUT:
4081 RETVAL
4082
4083# helper for Coro::Channel and others
4084SV *
4085_alloc (int count)
4086 CODE:
4087 RETVAL = coro_waitarray_new (aTHX_ count);
4088 OUTPUT:
4089 RETVAL
4090
4091SV *
4092count (SV *self)
4093 CODE:
4094 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4095 OUTPUT:
4096 RETVAL
4097
4098void
4099up (SV *self, int adjust = 1)
4100 ALIAS:
4101 adjust = 1
4102 CODE:
4103 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4104
4105void
4106down (...)
4107 CODE:
4108 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4109
4110void
4111wait (...)
4112 CODE:
4113 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4114
4115void
4116try (SV *self)
4117 PPCODE:
4118{
4119 AV *av = (AV *)SvRV (self);
4120 SV *count_sv = AvARRAY (av)[0];
4121 IV count = SvIVX (count_sv);
4122
4123 if (count > 0)
4124 {
4125 --count;
4126 SvIVX (count_sv) = count;
4127 XSRETURN_YES;
4128 }
4129 else
4130 XSRETURN_NO;
4131}
4132
4133void
4134waiters (SV *self)
4135 PPCODE:
4136{
4137 AV *av = (AV *)SvRV (self);
4138 int wcount = AvFILLp (av) + 1 - 1;
4139
4140 if (GIMME_V == G_SCALAR)
4141 XPUSHs (sv_2mortal (newSViv (wcount)));
4142 else
4143 {
4144 int i;
4145 EXTEND (SP, wcount);
4146 for (i = 1; i <= wcount; ++i)
4147 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4148 }
4149}
4150
4151MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4152
4153void
4154_may_delete (SV *sem, int count, unsigned int extra_refs)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (sem);
4158
4159 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4160 && AvFILLp (av) == 0 /* no waiters, just count */
4161 && SvIV (AvARRAY (av)[0]) == count)
4162 XSRETURN_YES;
4163
4164 XSRETURN_NO;
4165}
4166
4167MODULE = Coro::State PACKAGE = Coro::Signal
4168
4169SV *
4170new (SV *klass)
4171 CODE:
4172 RETVAL = sv_bless (
4173 coro_waitarray_new (aTHX_ 0),
4174 GvSTASH (CvGV (cv))
4175 );
4176 OUTPUT:
4177 RETVAL
4178
4179void
4180wait (...)
4181 CODE:
4182 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4183
4184void
4185broadcast (SV *self)
4186 CODE:
4187{
4188 AV *av = (AV *)SvRV (self);
4189 coro_signal_wake (aTHX_ av, AvFILLp (av));
4190}
4191
4192void
4193send (SV *self)
4194 CODE:
4195{
4196 AV *av = (AV *)SvRV (self);
4197
4198 if (AvFILLp (av))
4199 coro_signal_wake (aTHX_ av, 1);
4200 else
4201 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4202}
4203
4204IV
4205awaited (SV *self)
4206 CODE:
4207 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4208 OUTPUT:
4209 RETVAL
4210
4211
4212MODULE = Coro::State PACKAGE = Coro::AnyEvent
4213
4214BOOT:
4215 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4216
4217void
4218_schedule (...)
4219 CODE:
4220{
4221 static int incede;
4222
4223 api_cede_notself (aTHX);
4224
4225 ++incede;
4226 while (coro_nready >= incede && api_cede (aTHX))
4227 ;
4228
4229 sv_setsv (sv_activity, &PL_sv_undef);
4230 if (coro_nready >= incede)
4231 {
4232 PUSHMARK (SP);
4233 PUTBACK;
4234 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4235 }
4236
4237 --incede;
4238}
4239
4240
4241MODULE = Coro::State PACKAGE = Coro::AIO
4242
4243void
4244_register (char *target, char *proto, SV *req)
4245 CODE:
4246{
4247 SV *req_cv = s_get_cv_croak (req);
4248 /* newXSproto doesn't return the CV on 5.8 */
4249 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4250 sv_setpv ((SV *)slf_cv, proto);
4251 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4252}
4253
4254MODULE = Coro::State PACKAGE = Coro::Select
4255
4256void
4257patch_pp_sselect ()
4258 CODE:
4259 if (!coro_old_pp_sselect)
4260 {
4261 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4262 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4263 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4264 }
4265
4266void
4267unpatch_pp_sselect ()
4268 CODE:
4269 if (coro_old_pp_sselect)
4270 {
4271 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4272 coro_old_pp_sselect = 0;
4273 }
4274

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