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Comparing Coro/Coro/State.xs (file contents):
Revision 1.266 by root, Fri Nov 14 03:26:22 2008 UTC vs.
Revision 1.395 by root, Fri May 6 07:22:14 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
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
12 17
13#include <stdio.h> 18#include <stdio.h>
14#include <errno.h> 19#include <errno.h>
15#include <assert.h> 20#include <assert.h>
16 21
17#ifdef WIN32 22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
18# undef setjmp 28# undef setjmp
19# undef longjmp 29# undef longjmp
20# undef _exit 30# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 31# define setjmp _setjmp /* deep magic */
22#else 32#else
23# include <inttypes.h> /* most portable stdint.h */ 33# include <inttypes.h> /* most portable stdint.h */
24#endif 34#endif
25 35
26#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
… …
51#endif 61#endif
52 62
53/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 64static int cctx_max_idle = 4;
55 65
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
108#endif 68#endif
109 69
110#ifndef CORO_STACKGUARD 70#ifndef CORO_STACKGUARD
… …
116# define CORO_PREFER_PERL_FUNCTIONS 0 76# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif 77#endif
118 78
119/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
121#define dSTACKLEVEL volatile char stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
122#define STACKLEVEL ((void *)&stacklevel) 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
123 88
124#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
125 90
126#if __GNUC__ >= 3 91#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value)) 93# define expect(expr,value) __builtin_expect ((expr), (value))
129# define INLINE static inline 94# define INLINE static inline
130#else 95#else
131# define attribute(x) 96# define attribute(x)
132# define expect(expr,value) (expr) 97# define expect(expr,value) (expr)
133# define INLINE static 98# define INLINE static
… …
137#define expect_true(expr) expect ((expr) != 0, 1) 102#define expect_true(expr) expect ((expr) != 0, 1)
138 103
139#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
140 105
141#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
142 108
143#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD 110# if CORO_PTHREAD
149static void *coro_thx; 111static void *coro_thx;
150# endif 112# endif
151
152#else
153
154# define LOCK (void)0
155# define UNLOCK (void)0
156
157#endif 113#endif
158 114
159# undef LOCK 115#ifdef __linux
160# define LOCK (void)0 116# include <time.h> /* for timespec */
161# undef UNLOCK 117# include <syscall.h> /* for SYS_* */
162# define UNLOCK (void)0 118# ifdef SYS_clock_gettime
163 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
164/* helper storage struct for Coro::AIO */ 120# define CORO_CLOCK_MONOTONIC 1
165struct io_state 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
166{ 122# endif
167 AV *res; 123#endif
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173 124
174static double (*nvtime)(); /* so why doesn't it take void? */ 125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
175 131
176static U32 cctx_gen; 132static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
178static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
179static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env; 136static JMPENV *main_top_env;
181static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
184 139
185struct transfer_args 140static AV *av_destroy; /* destruction queue */
186{ 141static SV *sv_manager; /* the manager coro */
187 struct coro *prev, *next; 142static SV *sv_idle; /* $Coro::idle */
188};
189 143
190static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook; 146static SV *rv_diehook;
193static SV *rv_warnhook; 147static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */ 148static HV *hv_sig; /* %SIG */
195 149
196/* async_pool helper stuff */ 150/* async_pool helper stuff */
197static SV *sv_pool_rss; 151static SV *sv_pool_rss;
198static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
199static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
200 157
201/* Coro::AnyEvent */ 158/* Coro::AnyEvent */
202static SV *sv_activity; 159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
203 166
204static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
206 169
207enum { 170enum {
… …
212 CC_TRACE_LINE = 0x10, /* trace each statement */ 175 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214}; 177};
215 178
216/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx { 180typedef struct coro_cctx
181{
218 struct coro_cctx *next; 182 struct coro_cctx *next;
219 183
220 /* the stack */ 184 /* the stack */
221 void *sptr; 185 void *sptr;
222 size_t ssize; 186 size_t ssize;
… …
232 int valgrind_id; 196 int valgrind_id;
233#endif 197#endif
234 unsigned char flags; 198 unsigned char flags;
235} coro_cctx; 199} coro_cctx;
236 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
237enum { 205enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
242}; 212};
243 213
244/* the structure where most of the perl state is stored, overlaid on the cxstack */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct { 215typedef struct
216{
246 SV *defsv; 217 SV *defsv;
247 AV *defav; 218 AV *defav;
248 SV *errsv; 219 SV *errsv;
249 SV *irsgv; 220 SV *irsgv;
221 HV *hinthv;
250#define VAR(name,type) type name; 222#define VAR(name,type) type name;
251# include "state.h" 223# include "state.h"
252#undef VAR 224#undef VAR
253} perl_slots; 225} perl_slots;
254 226
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256 228
257/* this is a structure representing a perl-level coroutine */ 229/* this is a structure representing a perl-level coroutine */
258struct coro { 230struct coro {
259 /* the c coroutine allocated to this perl coroutine, if any */ 231 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 232 coro_cctx *cctx;
261 233
262 /* process data */ 234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
238 struct CoroSLF slf_frame; /* saved slf frame */
263 AV *mainstack; 239 AV *mainstack;
264 perl_slots *slot; /* basically the saved sp */ 240 perl_slots *slot; /* basically the saved sp */
265 241
242 CV *startcv; /* the CV to execute */
266 AV *args; /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
267 int refcnt; /* coroutines are refcounted, yes */ 244 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */ 245 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */ 246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
270 248
271 /* statistics */ 249 /* statistics */
272 int usecount; /* number of transfers to this coro */ 250 int usecount; /* number of transfers to this coro */
273 251
274 /* coro process data */ 252 /* coro process data */
275 int prio; 253 int prio;
276 SV *throw; /* exception to be thrown */ 254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
277 256
278 /* async_pool */ 257 /* async_pool */
279 SV *saved_deffh; 258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
280 271
281 /* linked list */ 272 /* linked list */
282 struct coro *next, *prev; 273 struct coro *next, *prev;
283}; 274};
284 275
285typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
286typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
287 278
279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
283
288/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
289 285
290#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
291#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
292#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
293#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
294#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
295#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
296 292
297/* for Coro.pm */ 293/* for Coro.pm */
298static SV *coro_current; 294static SV *coro_current;
299static SV *coro_readyhook; 295static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
301static int coro_nready; 297static CV *cv_coro_run, *cv_coro_terminate;
302static struct coro *coro_first; 298static struct coro *coro_first;
299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
303 372
304/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
305 374
306static SV * 375static SV *
307coro_get_sv (pTHX_ const char *name, int create) 376coro_get_sv (pTHX_ const char *name, int create)
… …
331 get_hv (name, create); 400 get_hv (name, create);
332#endif 401#endif
333 return get_hv (name, create); 402 return get_hv (name, create);
334} 403}
335 404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
336static AV * 504static AV *
337coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
338{ 506{
339 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
340 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
341 509
342 newpadlist = newAV (); 510 newpadlist = newAV ();
… …
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
348#endif 516#endif
349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
350 --AvFILLp (padlist); 518 --AvFILLp (padlist);
351 519
352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
353 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
354 522
355 return newpadlist; 523 return newpadlist;
356} 524}
357 525
358static void 526static void
359free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
360{ 528{
361 /* may be during global destruction */ 529 /* may be during global destruction */
362 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
363 { 531 {
364 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
365 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
366 { 535 {
367 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
368 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
369 { 538 I32 j = AvFILLp (av);
370 SV *sv; 539
371 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
372 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
373
374 SvREFCNT_dec (*svp);
375 }
376 } 545 }
377 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
378 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
379 } 551 }
380} 552}
381 553
382static int 554static int
383coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
384{ 556{
385 AV *padlist; 557 AV *padlist;
386 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
387 563
388 /* casting is fun. */ 564 /* casting is fun. */
389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
390 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
391 567
392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393 569
394 return 0; 570 return 0;
395} 571}
396
397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
399 572
400static MGVTBL coro_cv_vtbl = { 573static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0, 574 0, 0, 0, 0,
402 coro_cv_free 575 coro_cv_free
403}; 576};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
440 577
441/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
442static void 579static void
443get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
444{ 581{
… …
450 else 587 else
451 { 588 {
452#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
453 /* this is probably cleaner? but also slower! */ 590 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */ 591 /* in practise, it seems to be less stable */
455 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
456 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
457 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
458 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
459#else 596#else
460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
461#endif 598#endif
462 } 599 }
463} 600}
464 601
465static void 602static void
… …
472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
473 610
474 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
475 612
476 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
477 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
478 615
479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
480} 617}
481 618
482/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
483 674
484static void 675static void
485load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
486{ 677{
487 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
488 c->slot = 0; 679 c->slot = 0;
489 680
490 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
491 682
492 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
493 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
494 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
496 688
497 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h" 690 # include "state.h"
499 #undef VAR 691 #undef VAR
500 692
… …
511 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
512 } 704 }
513 705
514 PUTBACK; 706 PUTBACK;
515 } 707 }
708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
516} 729}
517 730
518static void 731static void
519save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
520{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
521 { 755 {
522 dSP; 756 dSP;
523 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
524 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
525 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
535 { 769 {
536 while (expect_true (cxix >= 0)) 770 while (expect_true (cxix >= 0))
537 { 771 {
538 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
539 773
540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
541 { 775 {
542 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
543 777
544 if (expect_true (CvDEPTH (cv))) 778 if (expect_true (CvDEPTH (cv)))
545 { 779 {
… …
569 /* we manually unroll here, as usually 2 slots is enough */ 803 /* we manually unroll here, as usually 2 slots is enough */
570 if (SLOT_COUNT >= 1) CXINC; 804 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC; 805 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC; 806 if (SLOT_COUNT >= 3) CXINC;
573 { 807 {
574 int i; 808 unsigned int i;
575 for (i = 3; i < SLOT_COUNT; ++i) 809 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC; 810 CXINC;
577 } 811 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
579 813
580 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
581 815
582 { 816 {
583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
584 818
585 slot->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
586 slot->defsv = DEFSV; 820 slot->defsv = DEFSV;
587 slot->errsv = ERRSV; 821 slot->errsv = ERRSV;
588 slot->irsgv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
589 824
590 #define VAR(name,type) slot->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
591 # include "state.h" 826 # include "state.h"
592 #undef VAR 827 #undef VAR
593 } 828 }
594} 829}
595 830
596/* 831/*
597 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
598 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
599 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
600 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
601 */ 836 */
602#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
604#else 839#else
605static void 840static void
606coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
607{ 842{
608 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 8);
… …
671#if !PERL_VERSION_ATLEAST (5,10,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
672 Safefree (PL_retstack); 907 Safefree (PL_retstack);
673#endif 908#endif
674} 909}
675 910
911#define CORO_RSS \
912 rss += sizeof (SYM (curstackinfo)); \
913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
919
676static size_t 920static size_t
677coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
678{ 922{
679 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
680 924
681 if (coro->mainstack) 925 if (coro->mainstack)
682 { 926 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
687 { 928 {
688 slot = &tmp_slot; 929 #define SYM(sym) PL_ ## sym
689 930 CORO_RSS;
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR 931 #undef SYM
693 } 932 }
694 else 933 else
695 slot = coro->slot;
696
697 if (slot)
698 { 934 {
699 rss += sizeof (slot->curstackinfo); 935 #define SYM(sym) coro->slot->sym
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 936 CORO_RSS;
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 937 #undef SYM
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 } 938 }
711 } 939 }
712 940
713 return rss; 941 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 SV **bot = SP;
728
729 int gimme = GIMME_V;
730
731 /* make sure we put something on the stack in scalar context */
732 if (gimme == G_SCALAR)
733 {
734 if (sp == bot)
735 XPUSHs (&PL_sv_undef);
736
737 SP = bot + 1;
738 }
739
740 PUTBACK;
741} 942}
742 943
743/** coroutine stack handling ************************************************/ 944/** coroutine stack handling ************************************************/
744 945
745static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
… …
754#endif 955#endif
755 956
756/* 957/*
757 * This overrides the default magic get method of %SIG elements. 958 * This overrides the default magic get method of %SIG elements.
758 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
759 * and instead of tryign to save and restore the hash elements, we just provide 960 * and instead of trying to save and restore the hash elements, we just provide
760 * readback here. 961 * readback here.
761 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
762 * not expecting this to actually change the hook. This is a potential problem
763 * when a schedule happens then, but we ignore this.
764 */ 962 */
765static int 963static int
766coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
767{ 965{
768 const char *s = MgPV_nolen_const (mg); 966 const char *s = MgPV_nolen_const (mg);
… …
821 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
822 1020
823 if (svp) 1021 if (svp)
824 { 1022 {
825 SV *old = *svp; 1023 SV *old = *svp;
826 *svp = newSVsv (sv); 1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
827 SvREFCNT_dec (old); 1025 SvREFCNT_dec (old);
828 return 0; 1026 return 0;
829 } 1027 }
830 } 1028 }
831 1029
832 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833} 1031}
834 1032
835static void 1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
1040static int
1041slf_check_nop (pTHX_ struct CoroSLF *frame)
1042{
1043 return 0;
1044}
1045
1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
836coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
837{ 1056{
838 /* 1057 /*
839 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
840 */ 1059 */
841 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
842 1061
843 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
844 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
845 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
846 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
847 PL_curpm = 0; 1069 PL_curpm = 0;
848 PL_curpad = 0; 1070 PL_curpad = 0;
849 PL_localizing = 0; 1071 PL_localizing = 0;
850 PL_dirty = 0;
851 PL_restartop = 0; 1072 PL_restartop = 0;
852#if PERL_VERSION_ATLEAST (5,10,0) 1073#if PERL_VERSION_ATLEAST (5,10,0)
853 PL_parser = 0; 1074 PL_parser = 0;
854#endif 1075#endif
1076 PL_hints = 0;
855 1077
856 /* recreate the die/warn hooks */ 1078 /* recreate the die/warn hooks */
857 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
858 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
859 1081
860 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
861 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
862 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
863 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
864 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
865 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
866 1089
867 { 1090 {
868 dSP; 1091 dSP;
869 UNOP myop; 1092 UNOP myop;
870 1093
871 Zero (&myop, 1, UNOP); 1094 Zero (&myop, 1, UNOP);
872 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
873 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
874 1098
875 PUSHMARK (SP); 1099 PUSHMARK (SP);
876 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1100 PUSHs ((SV *)coro->startcv);
877 PUTBACK; 1101 PUTBACK;
878 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
879 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880 SPAGAIN;
881 } 1104 }
882 1105
883 /* this newly created coroutine might be run on an existing cctx which most 1106 /* this newly created coroutine might be run on an existing cctx which most
884 * likely was suspended in set_stacklevel, called from pp_set_stacklevel, 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
885 * so we have to emulate entering pp_set_stacklevel here.
886 */ 1108 */
887 SSL_HEAD; 1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
888} 1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
889 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
890static void 1132static void
891coro_destruct (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
892{ 1134{
893 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
894 { 1136 {
895 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
896 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
904 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
905 1147
906 /* unwind main stack */ 1148 /* unwind main stack */
907 dounwind (-1); 1149 dounwind (-1);
908 } 1150 }
1151}
909 1152
910 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
911 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
912 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
913 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
914 SvREFCNT_dec (PL_rs);
915 SvREFCNT_dec (GvSV (irsgv));
916 1157
917 SvREFCNT_dec (PL_diehook);
918 SvREFCNT_dec (PL_warnhook);
919 1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 /*SvRV_set (coro_current, (SV *)coro->hv);*/
1165 load_perl (aTHX_ coro);
1166
1167 coro_unwind_stacks (aTHX);
1168 coro_destruct_stacks (aTHX);
1169
1170 /* restore swapped sv's */
1171 SWAP_SVS (coro);
1172
1173 // now save some sv's to be free'd later
1174 svf [0] = GvSV (PL_defgv);
1175 svf [1] = (SV *)GvAV (PL_defgv);
1176 svf [2] = GvSV (PL_errgv);
1177 svf [3] = (SV *)PL_defoutgv;
1178 svf [4] = PL_rs;
1179 svf [5] = GvSV (irsgv);
1180 svf [6] = (SV *)GvHV (PL_hintgv);
1181 svf [7] = PL_diehook;
1182 svf [8] = PL_warnhook;
1183 assert (9 == sizeof (svf) / sizeof (*svf));
1184
1185 /*SvRV_set (coro_current, (SV *)current->hv);*/
1186 load_perl (aTHX_ current);
1187 }
1188
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1193 SvREFCNT_dec (svf [i]);
1194
920 SvREFCNT_dec (coro->saved_deffh); 1195 SvREFCNT_dec (coro->saved_deffh);
921 SvREFCNT_dec (coro->throw); 1196 SvREFCNT_dec (coro->rouse_cb);
922 1197 SvREFCNT_dec (coro->invoke_cb);
923 coro_destruct_stacks (aTHX); 1198 SvREFCNT_dec (coro->invoke_av);
1199 }
924} 1200}
925 1201
926INLINE void 1202INLINE void
927free_coro_mortal (pTHX) 1203free_coro_mortal (pTHX)
928{ 1204{
… …
936static int 1212static int
937runops_trace (pTHX) 1213runops_trace (pTHX)
938{ 1214{
939 COP *oldcop = 0; 1215 COP *oldcop = 0;
940 int oldcxix = -2; 1216 int oldcxix = -2;
941 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
942 coro_cctx *cctx = coro->cctx;
943 1217
944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1218 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945 { 1219 {
946 PERL_ASYNC_CHECK (); 1220 PERL_ASYNC_CHECK ();
947 1221
948 if (cctx->flags & CC_TRACE_ALL) 1222 if (cctx_current->flags & CC_TRACE_ALL)
949 { 1223 {
950 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1224 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
951 { 1225 {
952 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1226 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
953 SV **bot, **top; 1227 SV **bot, **top;
954 AV *av = newAV (); /* return values */ 1228 AV *av = newAV (); /* return values */
955 SV **cb; 1229 SV **cb;
… …
992 1266
993 if (PL_curcop != &PL_compiling) 1267 if (PL_curcop != &PL_compiling)
994 { 1268 {
995 SV **cb; 1269 SV **cb;
996 1270
997 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1271 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
998 { 1272 {
999 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1273 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1000 1274
1001 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1275 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1002 { 1276 {
1003 runops_proc_t old_runops = PL_runops;
1004 dSP; 1277 dSP;
1005 GV *gv = CvGV (cx->blk_sub.cv); 1278 GV *gv = CvGV (cx->blk_sub.cv);
1006 SV *fullname = sv_2mortal (newSV (0)); 1279 SV *fullname = sv_2mortal (newSV (0));
1007 1280
1008 if (isGV (gv)) 1281 if (isGV (gv))
… …
1013 SAVETMPS; 1286 SAVETMPS;
1014 EXTEND (SP, 3); 1287 EXTEND (SP, 3);
1015 PUSHMARK (SP); 1288 PUSHMARK (SP);
1016 PUSHs (&PL_sv_yes); 1289 PUSHs (&PL_sv_yes);
1017 PUSHs (fullname); 1290 PUSHs (fullname);
1018 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1291 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1019 PUTBACK; 1292 PUTBACK;
1020 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1293 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1021 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1294 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1022 SPAGAIN; 1295 SPAGAIN;
1023 FREETMPS; 1296 FREETMPS;
… …
1026 } 1299 }
1027 1300
1028 oldcxix = cxstack_ix; 1301 oldcxix = cxstack_ix;
1029 } 1302 }
1030 1303
1031 if (cctx->flags & CC_TRACE_LINE) 1304 if (cctx_current->flags & CC_TRACE_LINE)
1032 { 1305 {
1033 dSP; 1306 dSP;
1034 1307
1035 PL_runops = RUNOPS_DEFAULT; 1308 PL_runops = RUNOPS_DEFAULT;
1036 ENTER; 1309 ENTER;
… …
1055 1328
1056 TAINT_NOT; 1329 TAINT_NOT;
1057 return 0; 1330 return 0;
1058} 1331}
1059 1332
1333static struct CoroSLF cctx_ssl_frame;
1334
1060static void 1335static void
1061prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1336slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1062{ 1337{
1063 ta->prev = (struct coro *)cctx;
1064 ta->next = 0; 1338 ta->prev = 0;
1065} 1339}
1066 1340
1067/* inject a fake call to Coro::State::_cctx_init into the execution */ 1341static int
1068/* _cctx_init should be careful, as it could be called at almost any time */ 1342slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1069/* during execution of a perl program */ 1343{
1070/* also initialises PL_top_env */ 1344 *frame = cctx_ssl_frame;
1345
1346 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1347}
1348
1349/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1071static void NOINLINE 1350static void NOINLINE
1072cctx_prepare (pTHX_ coro_cctx *cctx) 1351cctx_prepare (pTHX)
1073{ 1352{
1074 dSP;
1075 UNOP myop;
1076
1077 PL_top_env = &PL_start_env; 1353 PL_top_env = &PL_start_env;
1078 1354
1079 if (cctx->flags & CC_TRACE) 1355 if (cctx_current->flags & CC_TRACE)
1080 PL_runops = runops_trace; 1356 PL_runops = runops_trace;
1081 1357
1082 Zero (&myop, 1, UNOP); 1358 /* we already must be executing an SLF op, there is no other valid way
1083 myop.op_next = PL_op; 1359 * that can lead to creation of a new cctx */
1084 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1360 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1361 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1085 1362
1086 PUSHMARK (SP); 1363 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1087 EXTEND (SP, 2); 1364 cctx_ssl_frame = slf_frame;
1088 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1365
1089 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1366 slf_frame.prepare = slf_prepare_set_stacklevel;
1090 PUTBACK; 1367 slf_frame.check = slf_check_set_stacklevel;
1091 PL_op = (OP *)&myop;
1092 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1093 SPAGAIN;
1094} 1368}
1095 1369
1096/* the tail of transfer: execute stuff we can only do after a transfer */ 1370/* the tail of transfer: execute stuff we can only do after a transfer */
1097INLINE void 1371INLINE void
1098transfer_tail (pTHX) 1372transfer_tail (pTHX)
1099{ 1373{
1100 struct coro *next = (struct coro *)transfer_next;
1101 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104 free_coro_mortal (aTHX); 1374 free_coro_mortal (aTHX);
1105 UNLOCK;
1106
1107 if (expect_false (next->throw))
1108 {
1109 SV *exception = sv_2mortal (next->throw);
1110
1111 next->throw = 0;
1112 sv_setsv (ERRSV, exception);
1113 croak (0);
1114 }
1115} 1375}
1116 1376
1117/* 1377/*
1118 * this is a _very_ stripped down perl interpreter ;) 1378 * this is a _very_ stripped down perl interpreter ;)
1119 */ 1379 */
… …
1126# endif 1386# endif
1127#endif 1387#endif
1128 { 1388 {
1129 dTHX; 1389 dTHX;
1130 1390
1131 /* we are the alternative tail to pp_set_stacklevel */ 1391 /* normally we would need to skip the entersub here */
1132 /* so do the same things here */ 1392 /* not doing so will re-execute it, which is exactly what we want */
1133 SSL_TAIL;
1134
1135 /* we now skip the op that did lead to transfer() */
1136 PL_op = PL_op->op_next; 1393 /* PL_nop = PL_nop->op_next */
1137 1394
1138 /* inject a fake subroutine call to cctx_init */ 1395 /* inject a fake subroutine call to cctx_init */
1139 cctx_prepare (aTHX_ (coro_cctx *)arg); 1396 cctx_prepare (aTHX);
1140 1397
1141 /* cctx_run is the alternative tail of transfer() */ 1398 /* cctx_run is the alternative tail of transfer() */
1142 transfer_tail (aTHX); 1399 transfer_tail (aTHX);
1143 1400
1144 /* somebody or something will hit me for both perl_run and PL_restartop */ 1401 /* somebody or something will hit me for both perl_run and PL_restartop */
1145 PL_restartop = PL_op; 1402 PL_restartop = PL_op;
1146 perl_run (PL_curinterp); 1403 perl_run (PL_curinterp);
1404 /*
1405 * Unfortunately, there is no way to get at the return values of the
1406 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1407 * runtime errors here, as this is just a random interpreter, not a thread.
1408 */
1147 1409
1148 /* 1410 /*
1149 * If perl-run returns we assume exit() was being called or the coro 1411 * If perl-run returns we assume exit() was being called or the coro
1150 * fell off the end, which seems to be the only valid (non-bug) 1412 * fell off the end, which seems to be the only valid (non-bug)
1151 * reason for perl_run to return. We try to exit by jumping to the 1413 * reason for perl_run to return. We try to exit by jumping to the
1152 * bootstrap-time "top" top_env, as we cannot restore the "main" 1414 * bootstrap-time "top" top_env, as we cannot restore the "main"
1153 * coroutine as Coro has no such concept 1415 * coroutine as Coro has no such concept.
1416 * This actually isn't valid with the pthread backend, but OSes requiring
1417 * that backend are too broken to do it in a standards-compliant way.
1154 */ 1418 */
1155 PL_top_env = main_top_env; 1419 PL_top_env = main_top_env;
1156 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1420 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1157 } 1421 }
1158} 1422}
… …
1235cctx_destroy (coro_cctx *cctx) 1499cctx_destroy (coro_cctx *cctx)
1236{ 1500{
1237 if (!cctx) 1501 if (!cctx)
1238 return; 1502 return;
1239 1503
1504 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1505
1240 --cctx_count; 1506 --cctx_count;
1241 coro_destroy (&cctx->cctx); 1507 coro_destroy (&cctx->cctx);
1242 1508
1243 /* coro_transfer creates new, empty cctx's */ 1509 /* coro_transfer creates new, empty cctx's */
1244 if (cctx->sptr) 1510 if (cctx->sptr)
… …
1302/** coroutine switching *****************************************************/ 1568/** coroutine switching *****************************************************/
1303 1569
1304static void 1570static void
1305transfer_check (pTHX_ struct coro *prev, struct coro *next) 1571transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306{ 1572{
1573 /* TODO: throwing up here is considered harmful */
1574
1307 if (expect_true (prev != next)) 1575 if (expect_true (prev != next))
1308 { 1576 {
1309 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1577 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1311 1579
1312 if (expect_false (next->flags & CF_RUNNING))
1313 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1314
1315 if (expect_false (next->flags & CF_DESTROYED)) 1580 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1316 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1317 1582
1318#if !PERL_VERSION_ATLEAST (5,10,0) 1583#if !PERL_VERSION_ATLEAST (5,10,0)
1319 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1584 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1321#endif 1586#endif
1322 } 1587 }
1323} 1588}
1324 1589
1325/* always use the TRANSFER macro */ 1590/* always use the TRANSFER macro */
1326static void NOINLINE 1591static void NOINLINE /* noinline so we have a fixed stackframe */
1327transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328{ 1593{
1329 dSTACKLEVEL; 1594 dSTACKLEVEL;
1330 1595
1331 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
1332 if (expect_false (!next)) 1597 if (expect_false (!prev))
1333 { 1598 {
1334 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1599 cctx_current->idle_sp = STACKLEVEL;
1335 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1336 } 1601 }
1337 else if (expect_true (prev != next)) 1602 else if (expect_true (prev != next))
1338 { 1603 {
1339 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
1340 1605
1341 if (expect_false (prev->flags & CF_NEW)) 1606 if (expect_false (prev->flags & CF_NEW))
1342 { 1607 {
1343 /* create a new empty/source context */ 1608 /* create a new empty/source context */
1344 prev->cctx = cctx_new_empty ();
1345 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
1346 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
1347 } 1611 }
1348 1612
1349 prev->flags &= ~CF_RUNNING; 1613 prev->flags &= ~CF_RUNNING;
1350 next->flags |= CF_RUNNING; 1614 next->flags |= CF_RUNNING;
1351
1352 LOCK;
1353 1615
1354 /* first get rid of the old state */ 1616 /* first get rid of the old state */
1355 save_perl (aTHX_ prev); 1617 save_perl (aTHX_ prev);
1356 1618
1357 if (expect_false (next->flags & CF_NEW)) 1619 if (expect_false (next->flags & CF_NEW))
1358 { 1620 {
1359 /* need to start coroutine */ 1621 /* need to start coroutine */
1360 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
1361 /* setup coroutine call */ 1623 /* setup coroutine call */
1362 coro_setup (aTHX_ next); 1624 init_perl (aTHX_ next);
1363 } 1625 }
1364 else 1626 else
1365 load_perl (aTHX_ next); 1627 load_perl (aTHX_ next);
1366 1628
1367 prev__cctx = prev->cctx;
1368
1369 /* possibly untie and reuse the cctx */ 1629 /* possibly untie and reuse the cctx */
1370 if (expect_true ( 1630 if (expect_true (
1371 prev__cctx->idle_sp == STACKLEVEL 1631 cctx_current->idle_sp == STACKLEVEL
1372 && !(prev__cctx->flags & CC_TRACE) 1632 && !(cctx_current->flags & CC_TRACE)
1373 && !force_cctx 1633 && !force_cctx
1374 )) 1634 ))
1375 { 1635 {
1376 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1377 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1378 1638
1379 prev->cctx = 0;
1380
1381 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1382 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1383 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1641 if (expect_false (CCTX_EXPIRED (cctx_current)))
1384 if (!next->cctx) 1642 if (expect_true (!next->cctx))
1385 next->cctx = cctx_get (aTHX); 1643 next->cctx = cctx_get (aTHX);
1386 1644
1387 cctx_put (prev__cctx); 1645 cctx_put (cctx_current);
1388 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
1389 1649
1390 ++next->usecount; 1650 ++next->usecount;
1391 1651
1392 if (expect_true (!next->cctx)) 1652 cctx_prev = cctx_current;
1393 next->cctx = cctx_get (aTHX); 1653 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1394 1654
1395 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1655 next->cctx = 0;
1396 transfer_next = next;
1397 1656
1398 if (expect_false (prev__cctx != next->cctx)) 1657 if (expect_false (cctx_prev != cctx_current))
1399 { 1658 {
1400 prev__cctx->top_env = PL_top_env; 1659 cctx_prev->top_env = PL_top_env;
1401 PL_top_env = next->cctx->top_env; 1660 PL_top_env = cctx_current->top_env;
1402 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1403 } 1662 }
1404 1663
1405 transfer_tail (aTHX); 1664 transfer_tail (aTHX);
1406 } 1665 }
1407} 1666}
… …
1409#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1410#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1411 1670
1412/** high level stuff ********************************************************/ 1671/** high level stuff ********************************************************/
1413 1672
1414static int 1673static void
1415coro_state_destroy (pTHX_ struct coro *coro) 1674coro_state_destroy (pTHX_ struct coro *coro)
1416{ 1675{
1417 if (coro->flags & CF_DESTROYED) 1676 if (coro->flags & CF_DESTROYED)
1418 return 0; 1677 return;
1678
1679 /* this callback is reserved for slf functions needing to do cleanup */
1680 if (coro->on_destroy && !PL_dirty)
1681 coro->on_destroy (aTHX_ coro);
1682
1683 /*
1684 * The on_destroy above most likely is from an SLF call.
1685 * Since by definition the SLF call will not finish when we destroy
1686 * the coro, we will have to force-finish it here, otherwise
1687 * cleanup functions cannot call SLF functions.
1688 */
1689 coro->slf_frame.prepare = 0;
1419 1690
1420 coro->flags |= CF_DESTROYED; 1691 coro->flags |= CF_DESTROYED;
1421 1692
1422 if (coro->flags & CF_READY) 1693 if (coro->flags & CF_READY)
1423 { 1694 {
1424 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1695 /* reduce nready, as destroying a ready coro effectively unreadies it */
1425 /* alternative: look through all ready queues and remove the coro */ 1696 /* alternative: look through all ready queues and remove the coro */
1426 LOCK;
1427 --coro_nready; 1697 --coro_nready;
1428 UNLOCK;
1429 } 1698 }
1430 else 1699 else
1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1700 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432 1701
1433 if (coro->mainstack && coro->mainstack != main_mainstack) 1702 if (coro->mainstack
1434 { 1703 && coro->mainstack != main_mainstack
1435 struct coro temp; 1704 && coro->slot
1436 1705 && !PL_dirty)
1437 if (coro->flags & CF_RUNNING)
1438 croak ("FATAL: tried to destroy currently running coroutine");
1439
1440 save_perl (aTHX_ &temp);
1441 load_perl (aTHX_ coro); 1706 destroy_perl (aTHX_ coro);
1442
1443 coro_destruct (aTHX_ coro);
1444
1445 load_perl (aTHX_ &temp);
1446
1447 coro->slot = 0;
1448 }
1449
1450 cctx_destroy (coro->cctx);
1451 SvREFCNT_dec (coro->args);
1452 1707
1453 if (coro->next) coro->next->prev = coro->prev; 1708 if (coro->next) coro->next->prev = coro->prev;
1454 if (coro->prev) coro->prev->next = coro->next; 1709 if (coro->prev) coro->prev->next = coro->next;
1455 if (coro == coro_first) coro_first = coro->next; 1710 if (coro == coro_first) coro_first = coro->next;
1456 1711
1457 return 1; 1712 cctx_destroy (coro->cctx);
1713 SvREFCNT_dec (coro->startcv);
1714 SvREFCNT_dec (coro->args);
1715 SvREFCNT_dec (coro->swap_sv);
1716 SvREFCNT_dec (CORO_THROW);
1458} 1717}
1459 1718
1460static int 1719static int
1461coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1720coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1462{ 1721{
… …
1494# define MGf_DUP 0 1753# define MGf_DUP 0
1495#endif 1754#endif
1496}; 1755};
1497 1756
1498static void 1757static void
1499prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1758prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1500{ 1759{
1501 ta->prev = SvSTATE (prev_sv); 1760 ta->prev = SvSTATE (prev_sv);
1502 ta->next = SvSTATE (next_sv); 1761 ta->next = SvSTATE (next_sv);
1503 TRANSFER_CHECK (*ta); 1762 TRANSFER_CHECK (*ta);
1504} 1763}
1505 1764
1506static void 1765static void
1507api_transfer (SV *prev_sv, SV *next_sv) 1766api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1508{ 1767{
1509 dTHX;
1510 struct transfer_args ta; 1768 struct coro_transfer_args ta;
1511 1769
1512 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1770 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513 TRANSFER (ta, 1); 1771 TRANSFER (ta, 1);
1514} 1772}
1515 1773
1516/** Coro ********************************************************************/ 1774/** Coro ********************************************************************/
1517 1775
1518static void 1776INLINE void
1519coro_enq (pTHX_ SV *coro_sv) 1777coro_enq (pTHX_ struct coro *coro)
1520{ 1778{
1521 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1779 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1522}
1523 1780
1524static SV * 1781 SvREFCNT_inc_NN (coro->hv);
1782
1783 coro->next_ready = 0;
1784 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1785 ready [1] = coro;
1786}
1787
1788INLINE struct coro *
1525coro_deq (pTHX) 1789coro_deq (pTHX)
1526{ 1790{
1527 int prio; 1791 int prio;
1528 1792
1529 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1793 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1530 if (AvFILLp (coro_ready [prio]) >= 0) 1794 {
1531 return av_shift (coro_ready [prio]); 1795 struct coro **ready = coro_ready [prio];
1796
1797 if (ready [0])
1798 {
1799 struct coro *coro = ready [0];
1800 ready [0] = coro->next_ready;
1801 return coro;
1802 }
1803 }
1532 1804
1533 return 0; 1805 return 0;
1534} 1806}
1535 1807
1808static void
1809invoke_sv_ready_hook_helper (void)
1810{
1811 dTHX;
1812 dSP;
1813
1814 ENTER;
1815 SAVETMPS;
1816
1817 PUSHMARK (SP);
1818 PUTBACK;
1819 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1820
1821 FREETMPS;
1822 LEAVE;
1823}
1824
1536static int 1825static int
1537api_ready (SV *coro_sv) 1826api_ready (pTHX_ SV *coro_sv)
1538{ 1827{
1539 dTHX;
1540 struct coro *coro;
1541 SV *sv_hook;
1542 void (*xs_hook)(void);
1543
1544 if (SvROK (coro_sv))
1545 coro_sv = SvRV (coro_sv);
1546
1547 coro = SvSTATE (coro_sv); 1828 struct coro *coro = SvSTATE (coro_sv);
1548 1829
1549 if (coro->flags & CF_READY) 1830 if (coro->flags & CF_READY)
1550 return 0; 1831 return 0;
1551 1832
1552 coro->flags |= CF_READY; 1833 coro->flags |= CF_READY;
1553 1834
1554 LOCK; 1835 coro_enq (aTHX_ coro);
1555 1836
1556 sv_hook = coro_nready ? 0 : coro_readyhook; 1837 if (!coro_nready++)
1557 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1838 if (coroapi.readyhook)
1558 1839 coroapi.readyhook ();
1559 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1560 ++coro_nready;
1561
1562 UNLOCK;
1563
1564 if (sv_hook)
1565 {
1566 dSP;
1567
1568 ENTER;
1569 SAVETMPS;
1570
1571 PUSHMARK (SP);
1572 PUTBACK;
1573 call_sv (sv_hook, G_DISCARD);
1574 SPAGAIN;
1575
1576 FREETMPS;
1577 LEAVE;
1578 }
1579
1580 if (xs_hook)
1581 xs_hook ();
1582 1840
1583 return 1; 1841 return 1;
1584} 1842}
1585 1843
1586static int 1844static int
1587api_is_ready (SV *coro_sv) 1845api_is_ready (pTHX_ SV *coro_sv)
1588{ 1846{
1589 dTHX;
1590
1591 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1847 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592} 1848}
1593 1849
1850/* expects to own a reference to next->hv */
1594INLINE void 1851INLINE void
1595prepare_schedule (pTHX_ struct transfer_args *ta) 1852prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1596{ 1853{
1597 SV *prev_sv, *next_sv;
1598
1599 for (;;)
1600 {
1601 LOCK;
1602 next_sv = coro_deq (aTHX);
1603
1604 /* nothing to schedule: call the idle handler */
1605 if (expect_false (!next_sv))
1606 {
1607 dSP;
1608 UNLOCK;
1609
1610 ENTER;
1611 SAVETMPS;
1612
1613 PUSHMARK (SP);
1614 PUTBACK;
1615 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1616 SPAGAIN;
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 UNLOCK;
1629 SvREFCNT_dec (next_sv);
1630 /* coro_nready has already been taken care of by destroy */
1631 continue;
1632 }
1633
1634 --coro_nready;
1635 UNLOCK;
1636 break;
1637 }
1638
1639 /* free this only after the transfer */
1640 prev_sv = SvRV (coro_current); 1854 SV *prev_sv = SvRV (coro_current);
1855
1641 ta->prev = SvSTATE (prev_sv); 1856 ta->prev = SvSTATE_hv (prev_sv);
1857 ta->next = next;
1858
1642 TRANSFER_CHECK (*ta); 1859 TRANSFER_CHECK (*ta);
1643 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1860
1644 ta->next->flags &= ~CF_READY;
1645 SvRV_set (coro_current, next_sv); 1861 SvRV_set (coro_current, (SV *)next->hv);
1646 1862
1647 LOCK;
1648 free_coro_mortal (aTHX); 1863 free_coro_mortal (aTHX);
1649 coro_mortal = prev_sv; 1864 coro_mortal = prev_sv;
1650 UNLOCK; 1865}
1866
1867static void
1868prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1869{
1870 for (;;)
1871 {
1872 struct coro *next = coro_deq (aTHX);
1873
1874 if (expect_true (next))
1875 {
1876 /* cannot transfer to destroyed coros, skip and look for next */
1877 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1878 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1879 else
1880 {
1881 next->flags &= ~CF_READY;
1882 --coro_nready;
1883
1884 prepare_schedule_to (aTHX_ ta, next);
1885 break;
1886 }
1887 }
1888 else
1889 {
1890 /* nothing to schedule: call the idle handler */
1891 if (SvROK (sv_idle)
1892 && SvOBJECT (SvRV (sv_idle)))
1893 {
1894 if (SvRV (sv_idle) == SvRV (coro_current))
1895 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1896
1897 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1898 api_ready (aTHX_ SvRV (sv_idle));
1899 --coro_nready;
1900 }
1901 else
1902 {
1903 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1904 dSP;
1905
1906 ENTER;
1907 SAVETMPS;
1908
1909 PUSHMARK (SP);
1910 PUTBACK;
1911 call_sv (sv_idle, G_VOID | G_DISCARD);
1912
1913 FREETMPS;
1914 LEAVE;
1915 }
1916 }
1917 }
1651} 1918}
1652 1919
1653INLINE void 1920INLINE void
1654prepare_cede (pTHX_ struct transfer_args *ta) 1921prepare_cede (pTHX_ struct coro_transfer_args *ta)
1655{ 1922{
1656 api_ready (coro_current); 1923 api_ready (aTHX_ coro_current);
1657 prepare_schedule (aTHX_ ta); 1924 prepare_schedule (aTHX_ ta);
1658} 1925}
1659 1926
1927INLINE void
1928prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1929{
1930 SV *prev = SvRV (coro_current);
1931
1932 if (coro_nready)
1933 {
1934 prepare_schedule (aTHX_ ta);
1935 api_ready (aTHX_ prev);
1936 }
1937 else
1938 prepare_nop (aTHX_ ta);
1939}
1940
1941static void
1942api_schedule (pTHX)
1943{
1944 struct coro_transfer_args ta;
1945
1946 prepare_schedule (aTHX_ &ta);
1947 TRANSFER (ta, 1);
1948}
1949
1950static void
1951api_schedule_to (pTHX_ SV *coro_sv)
1952{
1953 struct coro_transfer_args ta;
1954 struct coro *next = SvSTATE (coro_sv);
1955
1956 SvREFCNT_inc_NN (coro_sv);
1957 prepare_schedule_to (aTHX_ &ta, next);
1958}
1959
1660static int 1960static int
1661prepare_cede_notself (pTHX_ struct transfer_args *ta) 1961api_cede (pTHX)
1662{ 1962{
1663 if (coro_nready) 1963 struct coro_transfer_args ta;
1664 { 1964
1665 SV *prev = SvRV (coro_current);
1666 prepare_schedule (aTHX_ ta); 1965 prepare_cede (aTHX_ &ta);
1667 api_ready (prev); 1966
1967 if (expect_true (ta.prev != ta.next))
1968 {
1969 TRANSFER (ta, 1);
1668 return 1; 1970 return 1;
1669 } 1971 }
1670 else 1972 else
1671 return 0; 1973 return 0;
1672} 1974}
1673 1975
1674static void
1675api_schedule (void)
1676{
1677 dTHX;
1678 struct transfer_args ta;
1679
1680 prepare_schedule (aTHX_ &ta);
1681 TRANSFER (ta, 1);
1682}
1683
1684static int 1976static int
1685api_cede (void) 1977api_cede_notself (pTHX)
1686{ 1978{
1687 dTHX; 1979 if (coro_nready)
1980 {
1688 struct transfer_args ta; 1981 struct coro_transfer_args ta;
1689 1982
1690 prepare_cede (aTHX_ &ta); 1983 prepare_cede_notself (aTHX_ &ta);
1691
1692 if (expect_true (ta.prev != ta.next))
1693 {
1694 TRANSFER (ta, 1); 1984 TRANSFER (ta, 1);
1695 return 1; 1985 return 1;
1696 } 1986 }
1697 else 1987 else
1698 return 0; 1988 return 0;
1699} 1989}
1700 1990
1701static int 1991static void
1702api_cede_notself (void)
1703{
1704 dTHX;
1705 struct transfer_args ta;
1706
1707 if (prepare_cede_notself (aTHX_ &ta))
1708 {
1709 TRANSFER (ta, 1);
1710 return 1;
1711 }
1712 else
1713 return 0;
1714}
1715
1716static void
1717api_trace (SV *coro_sv, int flags) 1992api_trace (pTHX_ SV *coro_sv, int flags)
1718{ 1993{
1719 dTHX;
1720 struct coro *coro = SvSTATE (coro_sv); 1994 struct coro *coro = SvSTATE (coro_sv);
1995
1996 if (coro->flags & CF_RUNNING)
1997 croak ("cannot enable tracing on a running coroutine, caught");
1721 1998
1722 if (flags & CC_TRACE) 1999 if (flags & CC_TRACE)
1723 { 2000 {
1724 if (!coro->cctx) 2001 if (!coro->cctx)
1725 coro->cctx = cctx_new_run (); 2002 coro->cctx = cctx_new_run ();
1726 else if (!(coro->cctx->flags & CC_TRACE)) 2003 else if (!(coro->cctx->flags & CC_TRACE))
1727 croak ("cannot enable tracing on coroutine with custom stack"); 2004 croak ("cannot enable tracing on coroutine with custom stack, caught");
1728 2005
1729 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2006 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1730 } 2007 }
1731 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2008 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1732 { 2009 {
… …
1737 else 2014 else
1738 coro->slot->runops = RUNOPS_DEFAULT; 2015 coro->slot->runops = RUNOPS_DEFAULT;
1739 } 2016 }
1740} 2017}
1741 2018
1742#if 0 2019static void
2020coro_call_on_destroy (pTHX_ struct coro *coro)
2021{
2022 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2023
2024 if (on_destroyp)
2025 {
2026 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2027 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2028 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2029
2030 while (AvFILLp (on_destroy) >= 0)
2031 {
2032 dSP; /* don't disturb outer sp */
2033 SV *cb = av_pop (on_destroy);
2034
2035 PUSHMARK (SP);
2036
2037 if (statusp)
2038 {
2039 int i;
2040 EXTEND (SP, AvFILLp (status) + 1);
2041
2042 for (i = 0; i <= AvFILLp (status); ++i)
2043 PUSHs (AvARRAY (status)[i]);
2044 }
2045
2046 PUTBACK;
2047 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2048 }
2049 }
2050}
2051
2052static void
2053coro_set_status (HV *coro_hv, SV **arg, int items)
2054{
2055 AV *av = newAV ();
2056
2057 /* items are actually not so common, so optimise for this case */
2058 if (items)
2059 {
2060 int i;
2061
2062 av_extend (av, items - 1);
2063
2064 for (i = 0; i < items; ++i)
2065 av_push (av, SvREFCNT_inc_NN (arg [i]));
2066 }
2067
2068 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2069}
2070
2071static void
2072slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2073{
2074 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2075 api_ready (aTHX_ sv_manager);
2076
2077 frame->prepare = prepare_schedule;
2078 frame->check = slf_check_repeat;
2079
2080 /* as a minor optimisation, we could unwind all stacks here */
2081 /* but that puts extra pressure on pp_slf, and is not worth much */
2082 /*coro_unwind_stacks (aTHX);*/
2083}
2084
2085static void
2086slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2087{
2088 HV *coro_hv = (HV *)SvRV (coro_current);
2089
2090 coro_set_status (coro_hv, arg, items);
2091 slf_init_terminate_cancel_common (frame, coro_hv);
2092}
2093
2094static void
2095slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 HV *coro_hv;
2098 struct coro *coro;
2099
2100 if (items <= 0)
2101 croak ("Coro::cancel called without coro object,");
2102
2103 coro = SvSTATE (arg [0]);
2104 coro_hv = coro->hv;
2105
2106 coro_set_status (coro_hv, arg + 1, items - 1);
2107
2108 if (expect_false (coro->flags & CF_NOCANCEL))
2109 {
2110 /* coro currently busy cancelling something, so just notify it */
2111 coro->slf_frame.data = (void *)coro;
2112
2113 frame->prepare = prepare_nop;
2114 frame->check = slf_check_nop;
2115 }
2116 else if (coro_hv == (HV *)SvRV (coro_current))
2117 {
2118 /* cancelling the current coro is allowed, and equals terminate */
2119 slf_init_terminate_cancel_common (frame, coro_hv);
2120 }
2121 else
2122 {
2123 struct coro *self = SvSTATE_current;
2124
2125 /* otherwise we cancel directly, purely for speed reasons
2126 * unfortunately, this requires some magic trickery, as
2127 * somebody else could cancel us, so we have to fight the cancellation.
2128 * this is ugly, and hopefully fully worth the extra speed.
2129 * besides, I can't get the slow-but-safe version working...
2130 */
2131 slf_frame.data = 0;
2132 self->flags |= CF_NOCANCEL;
2133
2134 coro_state_destroy (aTHX_ coro);
2135 coro_call_on_destroy (aTHX_ coro);
2136
2137 self->flags &= ~CF_NOCANCEL;
2138
2139 if (slf_frame.data)
2140 {
2141 /* while we were busy we have been cancelled, so terminate */
2142 slf_init_terminate_cancel_common (frame, self->hv);
2143 }
2144 else
2145 {
2146 frame->prepare = prepare_nop;
2147 frame->check = slf_check_nop;
2148 }
2149 }
2150}
2151
2152/*****************************************************************************/
2153/* async pool handler */
2154
1743static int 2155static int
1744coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2156slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1745{ 2157{
1746 AV *padlist; 2158 HV *hv = (HV *)SvRV (coro_current);
1747 AV *av = (AV *)mg->mg_obj; 2159 struct coro *coro = (struct coro *)frame->data;
1748 2160
1749 abort (); 2161 if (!coro->invoke_cb)
2162 return 1; /* loop till we have invoke */
2163 else
2164 {
2165 hv_store (hv, "desc", sizeof ("desc") - 1,
2166 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2167
2168 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2169
2170 {
2171 dSP;
2172 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2173 PUTBACK;
2174 }
2175
2176 SvREFCNT_dec (GvAV (PL_defgv));
2177 GvAV (PL_defgv) = coro->invoke_av;
2178 coro->invoke_av = 0;
2179
2180 return 0;
2181 }
2182}
2183
2184static void
2185slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *hv = (HV *)SvRV (coro_current);
2188 struct coro *coro = SvSTATE_hv ((SV *)hv);
2189
2190 if (expect_true (coro->saved_deffh))
2191 {
2192 /* subsequent iteration */
2193 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2194 coro->saved_deffh = 0;
2195
2196 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2197 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2198 {
2199 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2200 coro->invoke_av = newAV ();
2201
2202 frame->prepare = prepare_nop;
2203 }
2204 else
2205 {
2206 av_clear (GvAV (PL_defgv));
2207 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2208
2209 coro->prio = 0;
2210
2211 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2212 api_trace (aTHX_ coro_current, 0);
2213
2214 frame->prepare = prepare_schedule;
2215 av_push (av_async_pool, SvREFCNT_inc (hv));
2216 }
2217 }
2218 else
2219 {
2220 /* first iteration, simply fall through */
2221 frame->prepare = prepare_nop;
2222 }
2223
2224 frame->check = slf_check_pool_handler;
2225 frame->data = (void *)coro;
2226}
2227
2228/*****************************************************************************/
2229/* rouse callback */
2230
2231#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2232
2233static void
2234coro_rouse_callback (pTHX_ CV *cv)
2235{
2236 dXSARGS;
2237 SV *data = (SV *)S_GENSUB_ARG;
2238
2239 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2240 {
2241 /* first call, set args */
2242 SV *coro = SvRV (data);
2243 AV *av = newAV ();
2244
2245 SvRV_set (data, (SV *)av);
2246
2247 /* better take a full copy of the arguments */
2248 while (items--)
2249 av_store (av, items, newSVsv (ST (items)));
2250
2251 api_ready (aTHX_ coro);
2252 SvREFCNT_dec (coro);
2253 }
2254
2255 XSRETURN_EMPTY;
2256}
2257
2258static int
2259slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2260{
2261 SV *data = (SV *)frame->data;
2262
2263 if (CORO_THROW)
2264 return 0;
2265
2266 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2267 return 1;
2268
2269 /* now push all results on the stack */
2270 {
2271 dSP;
2272 AV *av = (AV *)SvRV (data);
2273 int i;
2274
2275 EXTEND (SP, AvFILLp (av) + 1);
2276 for (i = 0; i <= AvFILLp (av); ++i)
2277 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2278
2279 /* we have stolen the elements, so set length to zero and free */
2280 AvFILLp (av) = -1;
2281 av_undef (av);
2282
2283 PUTBACK;
2284 }
1750 2285
1751 return 0; 2286 return 0;
1752} 2287}
1753 2288
1754static MGVTBL coro_gensub_vtbl = { 2289static void
1755 0, 0, 0, 0, 2290slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1756 coro_gensub_free 2291{
1757}; 2292 SV *cb;
1758#endif 2293
2294 if (items)
2295 cb = arg [0];
2296 else
2297 {
2298 struct coro *coro = SvSTATE_current;
2299
2300 if (!coro->rouse_cb)
2301 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2302
2303 cb = sv_2mortal (coro->rouse_cb);
2304 coro->rouse_cb = 0;
2305 }
2306
2307 if (!SvROK (cb)
2308 || SvTYPE (SvRV (cb)) != SVt_PVCV
2309 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2310 croak ("Coro::rouse_wait called with illegal callback argument,");
2311
2312 {
2313 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2314 SV *data = (SV *)S_GENSUB_ARG;
2315
2316 frame->data = (void *)data;
2317 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2318 frame->check = slf_check_rouse_wait;
2319 }
2320}
2321
2322static SV *
2323coro_new_rouse_cb (pTHX)
2324{
2325 HV *hv = (HV *)SvRV (coro_current);
2326 struct coro *coro = SvSTATE_hv (hv);
2327 SV *data = newRV_inc ((SV *)hv);
2328 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2329
2330 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2331 SvREFCNT_dec (data); /* magicext increases the refcount */
2332
2333 SvREFCNT_dec (coro->rouse_cb);
2334 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2335
2336 return cb;
2337}
2338
2339/*****************************************************************************/
2340/* schedule-like-function opcode (SLF) */
2341
2342static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2343static const CV *slf_cv;
2344static SV **slf_argv;
2345static int slf_argc, slf_arga; /* count, allocated */
2346static I32 slf_ax; /* top of stack, for restore */
2347
2348/* this restores the stack in the case we patched the entersub, to */
2349/* recreate the stack frame as perl will on following calls */
2350/* since entersub cleared the stack */
2351static OP *
2352pp_restore (pTHX)
2353{
2354 int i;
2355 SV **SP = PL_stack_base + slf_ax;
2356
2357 PUSHMARK (SP);
2358
2359 EXTEND (SP, slf_argc + 1);
2360
2361 for (i = 0; i < slf_argc; ++i)
2362 PUSHs (sv_2mortal (slf_argv [i]));
2363
2364 PUSHs ((SV *)CvGV (slf_cv));
2365
2366 RETURNOP (slf_restore.op_first);
2367}
2368
2369static void
2370slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2371{
2372 SV **arg = (SV **)slf_frame.data;
2373
2374 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2375}
2376
2377static void
2378slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2379{
2380 if (items != 2)
2381 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2382
2383 frame->prepare = slf_prepare_transfer;
2384 frame->check = slf_check_nop;
2385 frame->data = (void *)arg; /* let's hope it will stay valid */
2386}
2387
2388static void
2389slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2390{
2391 frame->prepare = prepare_schedule;
2392 frame->check = slf_check_nop;
2393}
2394
2395static void
2396slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2397{
2398 struct coro *next = (struct coro *)slf_frame.data;
2399
2400 SvREFCNT_inc_NN (next->hv);
2401 prepare_schedule_to (aTHX_ ta, next);
2402}
2403
2404static void
2405slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2406{
2407 if (!items)
2408 croak ("Coro::schedule_to expects a coroutine argument, caught");
2409
2410 frame->data = (void *)SvSTATE (arg [0]);
2411 frame->prepare = slf_prepare_schedule_to;
2412 frame->check = slf_check_nop;
2413}
2414
2415static void
2416slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2417{
2418 api_ready (aTHX_ SvRV (coro_current));
2419
2420 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2421}
2422
2423static void
2424slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2425{
2426 frame->prepare = prepare_cede;
2427 frame->check = slf_check_nop;
2428}
2429
2430static void
2431slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 frame->prepare = prepare_cede_notself;
2434 frame->check = slf_check_nop;
2435}
2436
2437/*
2438 * these not obviously related functions are all rolled into one
2439 * function to increase chances that they all will call transfer with the same
2440 * stack offset
2441 * SLF stands for "schedule-like-function".
2442 */
2443static OP *
2444pp_slf (pTHX)
2445{
2446 I32 checkmark; /* mark SP to see how many elements check has pushed */
2447
2448 /* set up the slf frame, unless it has already been set-up */
2449 /* the latter happens when a new coro has been started */
2450 /* or when a new cctx was attached to an existing coroutine */
2451 if (expect_true (!slf_frame.prepare))
2452 {
2453 /* first iteration */
2454 dSP;
2455 SV **arg = PL_stack_base + TOPMARK + 1;
2456 int items = SP - arg; /* args without function object */
2457 SV *gv = *sp;
2458
2459 /* do a quick consistency check on the "function" object, and if it isn't */
2460 /* for us, divert to the real entersub */
2461 if (SvTYPE (gv) != SVt_PVGV
2462 || !GvCV (gv)
2463 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2464 return PL_ppaddr[OP_ENTERSUB](aTHX);
2465
2466 if (!(PL_op->op_flags & OPf_STACKED))
2467 {
2468 /* ampersand-form of call, use @_ instead of stack */
2469 AV *av = GvAV (PL_defgv);
2470 arg = AvARRAY (av);
2471 items = AvFILLp (av) + 1;
2472 }
2473
2474 /* now call the init function, which needs to set up slf_frame */
2475 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2476 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2477
2478 /* pop args */
2479 SP = PL_stack_base + POPMARK;
2480
2481 PUTBACK;
2482 }
2483
2484 /* now that we have a slf_frame, interpret it! */
2485 /* we use a callback system not to make the code needlessly */
2486 /* complicated, but so we can run multiple perl coros from one cctx */
2487
2488 do
2489 {
2490 struct coro_transfer_args ta;
2491
2492 slf_frame.prepare (aTHX_ &ta);
2493 TRANSFER (ta, 0);
2494
2495 checkmark = PL_stack_sp - PL_stack_base;
2496 }
2497 while (slf_frame.check (aTHX_ &slf_frame));
2498
2499 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2500
2501 /* exception handling */
2502 if (expect_false (CORO_THROW))
2503 {
2504 SV *exception = sv_2mortal (CORO_THROW);
2505
2506 CORO_THROW = 0;
2507 sv_setsv (ERRSV, exception);
2508 croak (0);
2509 }
2510
2511 /* return value handling - mostly like entersub */
2512 /* make sure we put something on the stack in scalar context */
2513 if (GIMME_V == G_SCALAR)
2514 {
2515 dSP;
2516 SV **bot = PL_stack_base + checkmark;
2517
2518 if (sp == bot) /* too few, push undef */
2519 bot [1] = &PL_sv_undef;
2520 else if (sp != bot + 1) /* too many, take last one */
2521 bot [1] = *sp;
2522
2523 SP = bot + 1;
2524
2525 PUTBACK;
2526 }
2527
2528 return NORMAL;
2529}
2530
2531static void
2532api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2533{
2534 int i;
2535 SV **arg = PL_stack_base + ax;
2536 int items = PL_stack_sp - arg + 1;
2537
2538 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2539
2540 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2541 && PL_op->op_ppaddr != pp_slf)
2542 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2543
2544 CvFLAGS (cv) |= CVf_SLF;
2545 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2546 slf_cv = cv;
2547
2548 /* we patch the op, and then re-run the whole call */
2549 /* we have to put the same argument on the stack for this to work */
2550 /* and this will be done by pp_restore */
2551 slf_restore.op_next = (OP *)&slf_restore;
2552 slf_restore.op_type = OP_CUSTOM;
2553 slf_restore.op_ppaddr = pp_restore;
2554 slf_restore.op_first = PL_op;
2555
2556 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2557
2558 if (PL_op->op_flags & OPf_STACKED)
2559 {
2560 if (items > slf_arga)
2561 {
2562 slf_arga = items;
2563 Safefree (slf_argv);
2564 New (0, slf_argv, slf_arga, SV *);
2565 }
2566
2567 slf_argc = items;
2568
2569 for (i = 0; i < items; ++i)
2570 slf_argv [i] = SvREFCNT_inc (arg [i]);
2571 }
2572 else
2573 slf_argc = 0;
2574
2575 PL_op->op_ppaddr = pp_slf;
2576 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2577
2578 PL_op = (OP *)&slf_restore;
2579}
2580
2581/*****************************************************************************/
2582/* dynamic wind */
2583
2584static void
2585on_enterleave_call (pTHX_ SV *cb)
2586{
2587 dSP;
2588
2589 PUSHSTACK;
2590
2591 PUSHMARK (SP);
2592 PUTBACK;
2593 call_sv (cb, G_VOID | G_DISCARD);
2594 SPAGAIN;
2595
2596 POPSTACK;
2597}
2598
2599static SV *
2600coro_avp_pop_and_free (pTHX_ AV **avp)
2601{
2602 AV *av = *avp;
2603 SV *res = av_pop (av);
2604
2605 if (AvFILLp (av) < 0)
2606 {
2607 *avp = 0;
2608 SvREFCNT_dec (av);
2609 }
2610
2611 return res;
2612}
2613
2614static void
2615coro_pop_on_enter (pTHX_ void *coro)
2616{
2617 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2618 SvREFCNT_dec (cb);
2619}
2620
2621static void
2622coro_pop_on_leave (pTHX_ void *coro)
2623{
2624 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2625 on_enterleave_call (aTHX_ sv_2mortal (cb));
2626}
1759 2627
1760/*****************************************************************************/ 2628/*****************************************************************************/
1761/* PerlIO::cede */ 2629/* PerlIO::cede */
1762 2630
1763typedef struct 2631typedef struct
… …
1791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2659 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1792 double now = nvtime (); 2660 double now = nvtime ();
1793 2661
1794 if (now >= self->next) 2662 if (now >= self->next)
1795 { 2663 {
1796 api_cede (); 2664 api_cede (aTHX);
1797 self->next = now + self->every; 2665 self->next = now + self->every;
1798 } 2666 }
1799 2667
1800 return PerlIOBuf_flush (aTHX_ f); 2668 return PerlIOBuf_flush (aTHX_ f);
1801} 2669}
… …
1831 PerlIOBuf_get_cnt, 2699 PerlIOBuf_get_cnt,
1832 PerlIOBuf_set_ptrcnt, 2700 PerlIOBuf_set_ptrcnt,
1833}; 2701};
1834 2702
1835/*****************************************************************************/ 2703/*****************************************************************************/
2704/* Coro::Semaphore & Coro::Signal */
1836 2705
1837static const CV *ssl_cv; /* for quick consistency check */
1838
1839static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1840static SV *ssl_arg0;
1841static SV *ssl_arg1;
1842
1843/* this restores the stack in the case we patched the entersub, to */
1844/* recreate the stack frame as perl will on following calls */
1845/* since entersub cleared the stack */
1846static OP * 2706static SV *
1847pp_restore (pTHX) 2707coro_waitarray_new (pTHX_ int count)
1848{ 2708{
2709 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2710 AV *av = newAV ();
2711 SV **ary;
2712
2713 /* unfortunately, building manually saves memory */
2714 Newx (ary, 2, SV *);
2715 AvALLOC (av) = ary;
2716#if PERL_VERSION_ATLEAST (5,10,0)
2717 AvARRAY (av) = ary;
2718#else
2719 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2720 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2721 SvPVX ((SV *)av) = (char *)ary;
2722#endif
2723 AvMAX (av) = 1;
2724 AvFILLp (av) = 0;
2725 ary [0] = newSViv (count);
2726
2727 return newRV_noinc ((SV *)av);
2728}
2729
2730/* semaphore */
2731
2732static void
2733coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2734{
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 count += adjust;
2739 SvIVX (count_sv) = count;
2740
2741 /* now wake up as many waiters as are expected to lock */
2742 while (count > 0 && AvFILLp (av) > 0)
2743 {
2744 SV *cb;
2745
2746 /* swap first two elements so we can shift a waiter */
2747 AvARRAY (av)[0] = AvARRAY (av)[1];
2748 AvARRAY (av)[1] = count_sv;
2749 cb = av_shift (av);
2750
2751 if (SvOBJECT (cb))
2752 {
2753 api_ready (aTHX_ cb);
2754 --count;
2755 }
2756 else if (SvTYPE (cb) == SVt_PVCV)
2757 {
2758 dSP;
2759 PUSHMARK (SP);
2760 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2761 PUTBACK;
2762 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2763 }
2764
2765 SvREFCNT_dec (cb);
2766 }
2767}
2768
2769static void
2770coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2771{
2772 /* call $sem->adjust (0) to possibly wake up some other waiters */
2773 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2774}
2775
2776static int
2777slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2778{
2779 AV *av = (AV *)frame->data;
2780 SV *count_sv = AvARRAY (av)[0];
2781
2782 /* if we are about to throw, don't actually acquire the lock, just throw */
2783 if (CORO_THROW)
2784 return 0;
2785 else if (SvIVX (count_sv) > 0)
2786 {
2787 SvSTATE_current->on_destroy = 0;
2788
2789 if (acquire)
2790 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2791 else
2792 coro_semaphore_adjust (aTHX_ av, 0);
2793
2794 return 0;
2795 }
2796 else
2797 {
2798 int i;
2799 /* if we were woken up but can't down, we look through the whole */
2800 /* waiters list and only add us if we aren't in there already */
2801 /* this avoids some degenerate memory usage cases */
2802
2803 for (i = 1; i <= AvFILLp (av); ++i)
2804 if (AvARRAY (av)[i] == SvRV (coro_current))
2805 return 1;
2806
2807 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2808 return 1;
2809 }
2810}
2811
2812static int
2813slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2814{
2815 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2816}
2817
2818static int
2819slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2820{
2821 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2822}
2823
2824static void
2825slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2826{
2827 AV *av = (AV *)SvRV (arg [0]);
2828
2829 if (SvIVX (AvARRAY (av)[0]) > 0)
2830 {
2831 frame->data = (void *)av;
2832 frame->prepare = prepare_nop;
2833 }
2834 else
2835 {
2836 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2837
2838 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2839 frame->prepare = prepare_schedule;
2840
2841 /* to avoid race conditions when a woken-up coro gets terminated */
2842 /* we arrange for a temporary on_destroy that calls adjust (0) */
2843 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2844 }
2845}
2846
2847static void
2848slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2849{
2850 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2851 frame->check = slf_check_semaphore_down;
2852}
2853
2854static void
2855slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2856{
2857 if (items >= 2)
2858 {
2859 /* callback form */
2860 AV *av = (AV *)SvRV (arg [0]);
2861 SV *cb_cv = s_get_cv_croak (arg [1]);
2862
2863 av_push (av, SvREFCNT_inc_NN (cb_cv));
2864
2865 if (SvIVX (AvARRAY (av)[0]) > 0)
2866 coro_semaphore_adjust (aTHX_ av, 0);
2867
2868 frame->prepare = prepare_nop;
2869 frame->check = slf_check_nop;
2870 }
2871 else
2872 {
2873 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2874 frame->check = slf_check_semaphore_wait;
2875 }
2876}
2877
2878/* signal */
2879
2880static void
2881coro_signal_wake (pTHX_ AV *av, int count)
2882{
2883 SvIVX (AvARRAY (av)[0]) = 0;
2884
2885 /* now signal count waiters */
2886 while (count > 0 && AvFILLp (av) > 0)
2887 {
2888 SV *cb;
2889
2890 /* swap first two elements so we can shift a waiter */
2891 cb = AvARRAY (av)[0];
2892 AvARRAY (av)[0] = AvARRAY (av)[1];
2893 AvARRAY (av)[1] = cb;
2894
2895 cb = av_shift (av);
2896
2897 if (SvTYPE (cb) == SVt_PVCV)
2898 {
2899 dSP;
2900 PUSHMARK (SP);
2901 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2902 PUTBACK;
2903 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2904 }
2905 else
2906 {
2907 api_ready (aTHX_ cb);
2908 sv_setiv (cb, 0); /* signal waiter */
2909 }
2910
2911 SvREFCNT_dec (cb);
2912
2913 --count;
2914 }
2915}
2916
2917static int
2918slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2919{
2920 /* if we are about to throw, also stop waiting */
2921 return SvROK ((SV *)frame->data) && !CORO_THROW;
2922}
2923
2924static void
2925slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2926{
2927 AV *av = (AV *)SvRV (arg [0]);
2928
2929 if (items >= 2)
2930 {
2931 SV *cb_cv = s_get_cv_croak (arg [1]);
2932 av_push (av, SvREFCNT_inc_NN (cb_cv));
2933
2934 if (SvIVX (AvARRAY (av)[0]))
2935 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2936
2937 frame->prepare = prepare_nop;
2938 frame->check = slf_check_nop;
2939 }
2940 else if (SvIVX (AvARRAY (av)[0]))
2941 {
2942 SvIVX (AvARRAY (av)[0]) = 0;
2943 frame->prepare = prepare_nop;
2944 frame->check = slf_check_nop;
2945 }
2946 else
2947 {
2948 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2949
2950 av_push (av, waiter);
2951
2952 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2953 frame->prepare = prepare_schedule;
2954 frame->check = slf_check_signal_wait;
2955 }
2956}
2957
2958/*****************************************************************************/
2959/* Coro::AIO */
2960
2961#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2962
2963/* helper storage struct */
2964struct io_state
2965{
2966 int errorno;
2967 I32 laststype; /* U16 in 5.10.0 */
2968 int laststatval;
2969 Stat_t statcache;
2970};
2971
2972static void
2973coro_aio_callback (pTHX_ CV *cv)
2974{
2975 dXSARGS;
2976 AV *state = (AV *)S_GENSUB_ARG;
2977 SV *coro = av_pop (state);
2978 SV *data_sv = newSV (sizeof (struct io_state));
2979
2980 av_extend (state, items - 1);
2981
2982 sv_upgrade (data_sv, SVt_PV);
2983 SvCUR_set (data_sv, sizeof (struct io_state));
2984 SvPOK_only (data_sv);
2985
2986 {
2987 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2988
2989 data->errorno = errno;
2990 data->laststype = PL_laststype;
2991 data->laststatval = PL_laststatval;
2992 data->statcache = PL_statcache;
2993 }
2994
2995 /* now build the result vector out of all the parameters and the data_sv */
2996 {
2997 int i;
2998
2999 for (i = 0; i < items; ++i)
3000 av_push (state, SvREFCNT_inc_NN (ST (i)));
3001 }
3002
3003 av_push (state, data_sv);
3004
3005 api_ready (aTHX_ coro);
3006 SvREFCNT_dec (coro);
3007 SvREFCNT_dec ((AV *)state);
3008}
3009
3010static int
3011slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3012{
3013 AV *state = (AV *)frame->data;
3014
3015 /* if we are about to throw, return early */
3016 /* this does not cancel the aio request, but at least */
3017 /* it quickly returns */
3018 if (CORO_THROW)
3019 return 0;
3020
3021 /* one element that is an RV? repeat! */
3022 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3023 return 1;
3024
3025 /* restore status */
3026 {
3027 SV *data_sv = av_pop (state);
3028 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3029
3030 errno = data->errorno;
3031 PL_laststype = data->laststype;
3032 PL_laststatval = data->laststatval;
3033 PL_statcache = data->statcache;
3034
3035 SvREFCNT_dec (data_sv);
3036 }
3037
3038 /* push result values */
3039 {
1849 dSP; 3040 dSP;
3041 int i;
1850 3042
3043 EXTEND (SP, AvFILLp (state) + 1);
3044 for (i = 0; i <= AvFILLp (state); ++i)
3045 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3046
3047 PUTBACK;
3048 }
3049
3050 return 0;
3051}
3052
3053static void
3054slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3055{
3056 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3057 SV *coro_hv = SvRV (coro_current);
3058 struct coro *coro = SvSTATE_hv (coro_hv);
3059
3060 /* put our coroutine id on the state arg */
3061 av_push (state, SvREFCNT_inc_NN (coro_hv));
3062
3063 /* first see whether we have a non-zero priority and set it as AIO prio */
3064 if (coro->prio)
3065 {
3066 dSP;
3067
3068 static SV *prio_cv;
3069 static SV *prio_sv;
3070
3071 if (expect_false (!prio_cv))
3072 {
3073 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3074 prio_sv = newSViv (0);
3075 }
3076
3077 PUSHMARK (SP);
3078 sv_setiv (prio_sv, coro->prio);
3079 XPUSHs (prio_sv);
3080
3081 PUTBACK;
3082 call_sv (prio_cv, G_VOID | G_DISCARD);
3083 }
3084
3085 /* now call the original request */
3086 {
3087 dSP;
3088 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3089 int i;
3090
1851 PUSHMARK (SP); 3091 PUSHMARK (SP);
1852 3092
1853 EXTEND (SP, 3); 3093 /* first push all args to the stack */
1854 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0; 3094 EXTEND (SP, items + 1);
1855 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1856 PUSHs ((SV *)CvGV (ssl_cv));
1857 3095
1858 RETURNOP (ssl_restore.op_first); 3096 for (i = 0; i < items; ++i)
1859} 3097 PUSHs (arg [i]);
1860 3098
1861/* declare prototype */ 3099 /* now push the callback closure */
1862XS(XS_Coro__State__set_stacklevel); 3100 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1863 3101
1864#define OPpENTERSUB_SSL 15 3102 /* now call the AIO function - we assume our request is uncancelable */
1865
1866static OP *
1867pp_set_stacklevel (pTHX)
1868{
1869 dSP;
1870 struct transfer_args ta;
1871 SV **arg = PL_stack_base + TOPMARK + 1;
1872 int items = SP - arg; /* args without function object */
1873
1874 /* do a quick consistency check on the "function" object, and if it isn't */
1875 /* for us, divert to the real entersub */
1876 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1877 return PL_ppaddr[OP_ENTERSUB](aTHX);
1878
1879 /* pop args */
1880 SP = PL_stack_base + POPMARK;
1881
1882 if (!(PL_op->op_flags & OPf_STACKED))
1883 {
1884 /* ampersand-form of call, use @_ instead of stack */
1885 AV *av = GvAV (PL_defgv);
1886 arg = AvARRAY (av);
1887 items = AvFILLp (av) + 1;
1888 }
1889
1890 PUTBACK; 3103 PUTBACK;
1891 switch (PL_op->op_private & OPpENTERSUB_SSL) 3104 call_sv ((SV *)req, G_VOID | G_DISCARD);
1892 { 3105 }
1893 case 0:
1894 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1895 break;
1896 3106
1897 case 1: 3107 /* now that the request is going, we loop till we have a result */
1898 if (items != 2) 3108 frame->data = (void *)state;
1899 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items); 3109 frame->prepare = prepare_schedule;
3110 frame->check = slf_check_aio_req;
3111}
1900 3112
1901 prepare_transfer (aTHX_ &ta, arg [0], arg [1]); 3113static void
1902 break; 3114coro_aio_req_xs (pTHX_ CV *cv)
3115{
3116 dXSARGS;
1903 3117
1904 case 2: 3118 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1905 prepare_schedule (aTHX_ &ta);
1906 break;
1907 3119
1908 case 3: 3120 XSRETURN_EMPTY;
1909 prepare_cede (aTHX_ &ta); 3121}
1910 break;
1911 3122
1912 case 4: 3123/*****************************************************************************/
1913 if (!prepare_cede_notself (aTHX_ &ta))
1914 goto skip;
1915 3124
1916 break; 3125#if CORO_CLONE
3126# include "clone.c"
3127#endif
3128
3129/*****************************************************************************/
3130
3131static SV *
3132coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3133{
3134 SV *coro_sv;
3135 struct coro *coro;
3136 MAGIC *mg;
3137 HV *hv;
3138 SV *cb;
3139 int i;
3140
3141 if (argc > 0)
1917 } 3142 {
3143 cb = s_get_cv_croak (argv [0]);
1918 3144
1919 TRANSFER (ta, 0); 3145 if (!is_coro)
1920 SPAGAIN; 3146 {
3147 if (CvISXSUB (cb))
3148 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
1921 3149
1922skip: 3150 if (!CvROOT (cb))
1923 PUTBACK; 3151 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
1924 SSL_TAIL; 3152 }
1925 SPAGAIN; 3153 }
1926 RETURN; 3154
3155 Newz (0, coro, 1, struct coro);
3156 coro->args = newAV ();
3157 coro->flags = CF_NEW;
3158
3159 if (coro_first) coro_first->prev = coro;
3160 coro->next = coro_first;
3161 coro_first = coro;
3162
3163 coro->hv = hv = newHV ();
3164 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3167
3168 if (argc > 0)
3169 {
3170 av_extend (coro->args, argc + is_coro - 1);
3171
3172 if (is_coro)
3173 {
3174 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3175 cb = (SV *)cv_coro_run;
3176 }
3177
3178 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3179
3180 for (i = 1; i < argc; i++)
3181 av_push (coro->args, newSVsv (argv [i]));
3182 }
3183
3184 return coro_sv;
1927} 3185}
1928 3186
1929MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3187MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1930 3188
1931PROTOTYPES: DISABLE 3189PROTOTYPES: DISABLE
1932 3190
1933# these not obviously related functions are all rolled into the same xs
1934# function to increase chances that they all will call transfer with the same
1935# stack offset
1936void
1937_set_stacklevel (...)
1938 ALIAS:
1939 Coro::State::transfer = 1
1940 Coro::schedule = 2
1941 Coro::cede = 3
1942 Coro::cede_notself = 4
1943 CODE:
1944{
1945 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1946
1947 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1948 ssl_cv = cv;
1949
1950 /* we patch the op, and then re-run the whole call */
1951 /* we have to put some dummy argument on the stack for this to work */
1952 ssl_restore.op_next = (OP *)&ssl_restore;
1953 ssl_restore.op_type = OP_NULL;
1954 ssl_restore.op_ppaddr = pp_restore;
1955 ssl_restore.op_first = PL_op;
1956
1957 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1958 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1959
1960 PL_op->op_ppaddr = pp_set_stacklevel;
1961 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1962
1963 PL_op = (OP *)&ssl_restore;
1964}
1965
1966BOOT: 3191BOOT:
1967{ 3192{
1968#ifdef USE_ITHREADS 3193#ifdef USE_ITHREADS
1969 MUTEX_INIT (&coro_lock);
1970# if CORO_PTHREAD 3194# if CORO_PTHREAD
1971 coro_thx = PERL_GET_CONTEXT; 3195 coro_thx = PERL_GET_CONTEXT;
1972# endif 3196# endif
1973#endif 3197#endif
1974 BOOT_PAGESIZE; 3198 BOOT_PAGESIZE;
1975 3199
3200 cctx_current = cctx_new_empty ();
3201
1976 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3202 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1977 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3203 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1978 3204
1979 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3205 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1980 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3206 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
1995 main_top_env = PL_top_env; 3221 main_top_env = PL_top_env;
1996 3222
1997 while (main_top_env->je_prev) 3223 while (main_top_env->je_prev)
1998 main_top_env = main_top_env->je_prev; 3224 main_top_env = main_top_env->je_prev;
1999 3225
2000 coroapi.ver = CORO_API_VERSION;
2001 coroapi.rev = CORO_API_REVISION;
2002 coroapi.transfer = api_transfer;
2003
2004 { 3226 {
2005 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3227 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2006 3228
2007 if (!svp) croak ("Time::HiRes is required"); 3229 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2008 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3230 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2009 3231
2010 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3232 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3233 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2011 } 3234 }
2012 3235
3236 coroapi.ver = CORO_API_VERSION;
3237 coroapi.rev = CORO_API_REVISION;
3238
3239 coroapi.transfer = api_transfer;
3240
3241 coroapi.sv_state = SvSTATE_;
3242 coroapi.execute_slf = api_execute_slf;
3243 coroapi.prepare_nop = prepare_nop;
3244 coroapi.prepare_schedule = prepare_schedule;
3245 coroapi.prepare_cede = prepare_cede;
3246 coroapi.prepare_cede_notself = prepare_cede_notself;
3247
3248 time_init (aTHX);
3249
2013 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3250 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2014} 3251}
2015 3252
2016SV * 3253SV *
2017new (char *klass, ...) 3254new (SV *klass, ...)
3255 ALIAS:
3256 Coro::new = 1
2018 CODE: 3257 CODE:
2019{ 3258 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2020 struct coro *coro;
2021 MAGIC *mg;
2022 HV *hv;
2023 int i;
2024
2025 Newz (0, coro, 1, struct coro);
2026 coro->args = newAV ();
2027 coro->flags = CF_NEW;
2028
2029 if (coro_first) coro_first->prev = coro;
2030 coro->next = coro_first;
2031 coro_first = coro;
2032
2033 coro->hv = hv = newHV ();
2034 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2035 mg->mg_flags |= MGf_DUP;
2036 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2037
2038 av_extend (coro->args, items - 1);
2039 for (i = 1; i < items; i++)
2040 av_push (coro->args, newSVsv (ST (i)));
2041}
2042 OUTPUT:
2043 RETVAL
2044
2045bool
2046_destroy (SV *coro_sv)
2047 CODE:
2048 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2049 OUTPUT: 3259 OUTPUT:
2050 RETVAL 3260 RETVAL
3261
3262void
3263transfer (...)
3264 PROTOTYPE: $$
3265 CODE:
3266 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2051 3267
2052void 3268void
2053_exit (int code) 3269_exit (int code)
2054 PROTOTYPE: $ 3270 PROTOTYPE: $
2055 CODE: 3271 CODE:
2056 _exit (code); 3272 _exit (code);
2057 3273
3274SV *
3275clone (Coro::State coro)
3276 CODE:
3277{
3278#if CORO_CLONE
3279 struct coro *ncoro = coro_clone (aTHX_ coro);
3280 MAGIC *mg;
3281 /* TODO: too much duplication */
3282 ncoro->hv = newHV ();
3283 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3284 mg->mg_flags |= MGf_DUP;
3285 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3286#else
3287 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3288#endif
3289}
3290 OUTPUT:
3291 RETVAL
3292
2058int 3293int
2059cctx_stacksize (int new_stacksize = 0) 3294cctx_stacksize (int new_stacksize = 0)
3295 PROTOTYPE: ;$
2060 CODE: 3296 CODE:
2061 RETVAL = cctx_stacksize; 3297 RETVAL = cctx_stacksize;
2062 if (new_stacksize) 3298 if (new_stacksize)
2063 { 3299 {
2064 cctx_stacksize = new_stacksize; 3300 cctx_stacksize = new_stacksize;
… …
2067 OUTPUT: 3303 OUTPUT:
2068 RETVAL 3304 RETVAL
2069 3305
2070int 3306int
2071cctx_max_idle (int max_idle = 0) 3307cctx_max_idle (int max_idle = 0)
3308 PROTOTYPE: ;$
2072 CODE: 3309 CODE:
2073 RETVAL = cctx_max_idle; 3310 RETVAL = cctx_max_idle;
2074 if (max_idle > 1) 3311 if (max_idle > 1)
2075 cctx_max_idle = max_idle; 3312 cctx_max_idle = max_idle;
2076 OUTPUT: 3313 OUTPUT:
2077 RETVAL 3314 RETVAL
2078 3315
2079int 3316int
2080cctx_count () 3317cctx_count ()
3318 PROTOTYPE:
2081 CODE: 3319 CODE:
2082 RETVAL = cctx_count; 3320 RETVAL = cctx_count;
2083 OUTPUT: 3321 OUTPUT:
2084 RETVAL 3322 RETVAL
2085 3323
2086int 3324int
2087cctx_idle () 3325cctx_idle ()
3326 PROTOTYPE:
2088 CODE: 3327 CODE:
2089 RETVAL = cctx_idle; 3328 RETVAL = cctx_idle;
2090 OUTPUT: 3329 OUTPUT:
2091 RETVAL 3330 RETVAL
2092 3331
2093void 3332void
2094list () 3333list ()
3334 PROTOTYPE:
2095 PPCODE: 3335 PPCODE:
2096{ 3336{
2097 struct coro *coro; 3337 struct coro *coro;
2098 for (coro = coro_first; coro; coro = coro->next) 3338 for (coro = coro_first; coro; coro = coro->next)
2099 if (coro->hv) 3339 if (coro->hv)
… …
2106 eval = 1 3346 eval = 1
2107 CODE: 3347 CODE:
2108{ 3348{
2109 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3349 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2110 { 3350 {
2111 struct coro temp; 3351 struct coro *current = SvSTATE_current;
3352 struct CoroSLF slf_save;
2112 3353
2113 if (!(coro->flags & CF_RUNNING)) 3354 if (current != coro)
2114 { 3355 {
2115 PUTBACK; 3356 PUTBACK;
2116 save_perl (aTHX_ &temp); 3357 save_perl (aTHX_ current);
2117 load_perl (aTHX_ coro); 3358 load_perl (aTHX_ coro);
3359 /* the coro is most likely in an active SLF call.
3360 * while not strictly required (the code we execute is
3361 * not allowed to call any SLF functions), it's cleaner
3362 * to reinitialise the slf_frame and restore it later.
3363 * This might one day allow us to actually do SLF calls
3364 * from code executed here.
3365 */
3366 slf_save = slf_frame;
3367 slf_frame.prepare = 0;
3368 SPAGAIN;
2118 } 3369 }
2119 3370
2120 {
2121 dSP;
2122 ENTER;
2123 SAVETMPS;
2124 PUTBACK;
2125 PUSHSTACK; 3371 PUSHSTACK;
3372
2126 PUSHMARK (SP); 3373 PUSHMARK (SP);
3374 PUTBACK;
2127 3375
2128 if (ix) 3376 if (ix)
2129 eval_sv (coderef, 0); 3377 eval_sv (coderef, 0);
2130 else 3378 else
2131 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3379 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2132 3380
2133 POPSTACK; 3381 POPSTACK;
2134 SPAGAIN; 3382 SPAGAIN;
2135 FREETMPS;
2136 LEAVE;
2137 PUTBACK;
2138 }
2139 3383
2140 if (!(coro->flags & CF_RUNNING)) 3384 if (current != coro)
2141 { 3385 {
3386 PUTBACK;
3387 slf_frame = slf_save;
2142 save_perl (aTHX_ coro); 3388 save_perl (aTHX_ coro);
2143 load_perl (aTHX_ &temp); 3389 load_perl (aTHX_ current);
2144 SPAGAIN; 3390 SPAGAIN;
2145 } 3391 }
2146 } 3392 }
2147} 3393}
2148 3394
… …
2152 ALIAS: 3398 ALIAS:
2153 is_ready = CF_READY 3399 is_ready = CF_READY
2154 is_running = CF_RUNNING 3400 is_running = CF_RUNNING
2155 is_new = CF_NEW 3401 is_new = CF_NEW
2156 is_destroyed = CF_DESTROYED 3402 is_destroyed = CF_DESTROYED
3403 is_suspended = CF_SUSPENDED
2157 CODE: 3404 CODE:
2158 RETVAL = boolSV (coro->flags & ix); 3405 RETVAL = boolSV (coro->flags & ix);
2159 OUTPUT: 3406 OUTPUT:
2160 RETVAL 3407 RETVAL
2161 3408
2162void 3409void
2163throw (Coro::State self, SV *throw = &PL_sv_undef) 3410throw (Coro::State self, SV *exception = &PL_sv_undef)
2164 PROTOTYPE: $;$ 3411 PROTOTYPE: $;$
2165 CODE: 3412 CODE:
3413{
3414 struct coro *current = SvSTATE_current;
3415 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2166 SvREFCNT_dec (self->throw); 3416 SvREFCNT_dec (*exceptionp);
2167 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3417 SvGETMAGIC (exception);
3418 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3419}
2168 3420
2169void 3421void
2170api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3422api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3423 PROTOTYPE: $;$
3424 C_ARGS: aTHX_ coro, flags
2171 3425
2172SV * 3426SV *
2173has_cctx (Coro::State coro) 3427has_cctx (Coro::State coro)
2174 PROTOTYPE: $ 3428 PROTOTYPE: $
2175 CODE: 3429 CODE:
2176 RETVAL = boolSV (!!coro->cctx); 3430 /* maybe manage the running flag differently */
3431 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2177 OUTPUT: 3432 OUTPUT:
2178 RETVAL 3433 RETVAL
2179 3434
2180int 3435int
2181is_traced (Coro::State coro) 3436is_traced (Coro::State coro)
… …
2199 OUTPUT: 3454 OUTPUT:
2200 RETVAL 3455 RETVAL
2201 3456
2202void 3457void
2203force_cctx () 3458force_cctx ()
3459 PROTOTYPE:
2204 CODE: 3460 CODE:
2205 struct coro *coro = SvSTATE (coro_current);
2206 coro->cctx->idle_sp = 0; 3461 cctx_current->idle_sp = 0;
2207 3462
2208void 3463void
2209swap_defsv (Coro::State self) 3464swap_defsv (Coro::State self)
2210 PROTOTYPE: $ 3465 PROTOTYPE: $
2211 ALIAS: 3466 ALIAS:
2212 swap_defav = 1 3467 swap_defav = 1
2213 CODE: 3468 CODE:
2214 if (!self->slot) 3469 if (!self->slot)
2215 croak ("cannot swap state with coroutine that has no saved state"); 3470 croak ("cannot swap state with coroutine that has no saved state,");
2216 else 3471 else
2217 { 3472 {
2218 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3473 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2219 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3474 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2220 3475
2221 SV *tmp = *src; *src = *dst; *dst = tmp; 3476 SV *tmp = *src; *src = *dst; *dst = tmp;
2222 } 3477 }
2223 3478
3479void
3480cancel (Coro::State self)
3481 CODE:
3482 coro_state_destroy (aTHX_ self);
3483
3484SV *
3485enable_times (int enabled = enable_times)
3486 CODE:
3487{
3488 RETVAL = boolSV (enable_times);
3489
3490 if (enabled != enable_times)
3491 {
3492 enable_times = enabled;
3493
3494 coro_times_update ();
3495 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3496 }
3497}
3498 OUTPUT:
3499 RETVAL
3500
3501void
3502times (Coro::State self)
3503 PPCODE:
3504{
3505 struct coro *current = SvSTATE (coro_current);
3506
3507 if (expect_false (current == self))
3508 {
3509 coro_times_update ();
3510 coro_times_add (SvSTATE (coro_current));
3511 }
3512
3513 EXTEND (SP, 2);
3514 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3515 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3516
3517 if (expect_false (current == self))
3518 coro_times_sub (SvSTATE (coro_current));
3519}
3520
3521void
3522swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3523 CODE:
3524{
3525 struct coro *current = SvSTATE_current;
3526
3527 if (current == coro)
3528 SWAP_SVS (current);
3529
3530 if (!coro->swap_sv)
3531 coro->swap_sv = newAV ();
3532
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3534 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3535
3536 if (current == coro)
3537 SWAP_SVS (current);
3538}
3539
3540
2224MODULE = Coro::State PACKAGE = Coro 3541MODULE = Coro::State PACKAGE = Coro
2225 3542
2226BOOT: 3543BOOT:
2227{ 3544{
2228 int i;
2229
2230 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2231 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3545 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2232 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3546 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2233 3547 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3548 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2234 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3549 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2235 SvREADONLY_on (coro_current); 3550 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3551 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3552 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3553 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2236 3554
3555 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3556 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3557 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3558 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3559
2237 coro_stash = gv_stashpv ("Coro", TRUE); 3560 coro_stash = gv_stashpv ("Coro", TRUE);
2238 3561
2239 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3562 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2240 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3563 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2241 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3564 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2242 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3565 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2243 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3566 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2244 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3567 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2245
2246 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2247 coro_ready[i] = newAV ();
2248 3568
2249 { 3569 {
2250 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3570 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2251 3571
2252 coroapi.schedule = api_schedule; 3572 coroapi.schedule = api_schedule;
3573 coroapi.schedule_to = api_schedule_to;
2253 coroapi.cede = api_cede; 3574 coroapi.cede = api_cede;
2254 coroapi.cede_notself = api_cede_notself; 3575 coroapi.cede_notself = api_cede_notself;
2255 coroapi.ready = api_ready; 3576 coroapi.ready = api_ready;
2256 coroapi.is_ready = api_is_ready; 3577 coroapi.is_ready = api_is_ready;
2257 coroapi.nready = &coro_nready; 3578 coroapi.nready = coro_nready;
2258 coroapi.current = coro_current; 3579 coroapi.current = coro_current;
2259 3580
2260 GCoroAPI = &coroapi; 3581 /*GCoroAPI = &coroapi;*/
2261 sv_setiv (sv, (IV)&coroapi); 3582 sv_setiv (sv, (IV)&coroapi);
2262 SvREADONLY_on (sv); 3583 SvREADONLY_on (sv);
2263 } 3584 }
2264} 3585}
3586
3587SV *
3588async (...)
3589 PROTOTYPE: &@
3590 CODE:
3591 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3592 api_ready (aTHX_ RETVAL);
3593 OUTPUT:
3594 RETVAL
3595
3596void
3597_destroy (Coro::State coro)
3598 CODE:
3599 /* used by the manager thread */
3600 coro_state_destroy (aTHX_ coro);
3601 coro_call_on_destroy (aTHX_ coro);
3602
3603void
3604terminate (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3607
3608void
3609cancel (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3612
3613void
3614schedule (...)
3615 CODE:
3616 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3617
3618void
3619schedule_to (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3622
3623void
3624cede_to (...)
3625 CODE:
3626 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3627
3628void
3629cede (...)
3630 CODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_cede);
3632
3633void
3634cede_notself (...)
3635 CODE:
3636 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2265 3637
2266void 3638void
2267_set_current (SV *current) 3639_set_current (SV *current)
2268 PROTOTYPE: $ 3640 PROTOTYPE: $
2269 CODE: 3641 CODE:
… …
2272 3644
2273void 3645void
2274_set_readyhook (SV *hook) 3646_set_readyhook (SV *hook)
2275 PROTOTYPE: $ 3647 PROTOTYPE: $
2276 CODE: 3648 CODE:
2277 LOCK;
2278 SvREFCNT_dec (coro_readyhook); 3649 SvREFCNT_dec (coro_readyhook);
3650 SvGETMAGIC (hook);
3651 if (SvOK (hook))
3652 {
2279 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3653 coro_readyhook = newSVsv (hook);
2280 UNLOCK; 3654 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3655 }
3656 else
3657 {
3658 coro_readyhook = 0;
3659 CORO_READYHOOK = 0;
3660 }
2281 3661
2282int 3662int
2283prio (Coro::State coro, int newprio = 0) 3663prio (Coro::State coro, int newprio = 0)
3664 PROTOTYPE: $;$
2284 ALIAS: 3665 ALIAS:
2285 nice = 1 3666 nice = 1
2286 CODE: 3667 CODE:
2287{ 3668{
2288 RETVAL = coro->prio; 3669 RETVAL = coro->prio;
… …
2290 if (items > 1) 3671 if (items > 1)
2291 { 3672 {
2292 if (ix) 3673 if (ix)
2293 newprio = coro->prio - newprio; 3674 newprio = coro->prio - newprio;
2294 3675
2295 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3676 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2296 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3677 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2297 3678
2298 coro->prio = newprio; 3679 coro->prio = newprio;
2299 } 3680 }
2300} 3681}
2301 OUTPUT: 3682 OUTPUT:
… …
2303 3684
2304SV * 3685SV *
2305ready (SV *self) 3686ready (SV *self)
2306 PROTOTYPE: $ 3687 PROTOTYPE: $
2307 CODE: 3688 CODE:
2308 RETVAL = boolSV (api_ready (self)); 3689 RETVAL = boolSV (api_ready (aTHX_ self));
2309 OUTPUT: 3690 OUTPUT:
2310 RETVAL 3691 RETVAL
2311 3692
2312int 3693int
2313nready (...) 3694nready (...)
… …
2315 CODE: 3696 CODE:
2316 RETVAL = coro_nready; 3697 RETVAL = coro_nready;
2317 OUTPUT: 3698 OUTPUT:
2318 RETVAL 3699 RETVAL
2319 3700
2320# for async_pool speedup
2321void 3701void
2322_pool_1 (SV *cb) 3702suspend (Coro::State self)
3703 PROTOTYPE: $
2323 CODE: 3704 CODE:
2324{ 3705 self->flags |= CF_SUSPENDED;
2325 struct coro *coro = SvSTATE (coro_current);
2326 HV *hv = (HV *)SvRV (coro_current);
2327 AV *defav = GvAV (PL_defgv);
2328 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2329 AV *invoke_av;
2330 int i, len;
2331 3706
2332 if (!invoke) 3707void
3708resume (Coro::State self)
3709 PROTOTYPE: $
3710 CODE:
3711 self->flags &= ~CF_SUSPENDED;
3712
3713void
3714_pool_handler (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3717
3718void
3719async_pool (SV *cv, ...)
3720 PROTOTYPE: &@
3721 PPCODE:
3722{
3723 HV *hv = (HV *)av_pop (av_async_pool);
3724 AV *av = newAV ();
3725 SV *cb = ST (0);
3726 int i;
3727
3728 av_extend (av, items - 2);
3729 for (i = 1; i < items; ++i)
3730 av_push (av, SvREFCNT_inc_NN (ST (i)));
3731
3732 if ((SV *)hv == &PL_sv_undef)
2333 { 3733 {
2334 SV *old = PL_diehook; 3734 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2335 PL_diehook = 0; 3735 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2336 SvREFCNT_dec (old); 3736 SvREFCNT_dec (sv);
2337 croak ("\3async_pool terminate\2\n");
2338 } 3737 }
2339 3738
2340 SvREFCNT_dec (coro->saved_deffh);
2341 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2342
2343 hv_store (hv, "desc", sizeof ("desc") - 1,
2344 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2345
2346 invoke_av = (AV *)SvRV (invoke);
2347 len = av_len (invoke_av);
2348
2349 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2350
2351 if (len > 0)
2352 { 3739 {
2353 av_fill (defav, len - 1); 3740 struct coro *coro = SvSTATE_hv (hv);
2354 for (i = 0; i < len; ++i) 3741
2355 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3742 assert (!coro->invoke_cb);
3743 assert (!coro->invoke_av);
3744 coro->invoke_cb = SvREFCNT_inc (cb);
3745 coro->invoke_av = av;
2356 } 3746 }
2357 3747
3748 api_ready (aTHX_ (SV *)hv);
3749
3750 if (GIMME_V != G_VOID)
3751 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3752 else
2358 SvREFCNT_dec (invoke); 3753 SvREFCNT_dec (hv);
2359} 3754}
2360 3755
2361void 3756SV *
2362_pool_2 (SV *cb) 3757rouse_cb ()
3758 PROTOTYPE:
2363 CODE: 3759 CODE:
2364{ 3760 RETVAL = coro_new_rouse_cb (aTHX);
2365 struct coro *coro = SvSTATE (coro_current);
2366
2367 sv_setsv (cb, &PL_sv_undef);
2368
2369 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2370 coro->saved_deffh = 0;
2371
2372 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2373 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2374 {
2375 SV *old = PL_diehook;
2376 PL_diehook = 0;
2377 SvREFCNT_dec (old);
2378 croak ("\3async_pool terminate\2\n");
2379 }
2380
2381 av_clear (GvAV (PL_defgv));
2382 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2383 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2384
2385 coro->prio = 0;
2386
2387 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2388 api_trace (coro_current, 0);
2389
2390 av_push (av_async_pool, newSVsv (coro_current));
2391}
2392
2393#if 0
2394
2395void
2396_generator_call (...)
2397 PROTOTYPE: @
2398 PPCODE:
2399 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2400 xxxx
2401 abort ();
2402
2403SV *
2404gensub (SV *sub, ...)
2405 PROTOTYPE: &;@
2406 CODE:
2407{
2408 struct coro *coro;
2409 MAGIC *mg;
2410 CV *xcv;
2411 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2412 int i;
2413
2414 CvGV (ncv) = CvGV (cv);
2415 CvFILE (ncv) = CvFILE (cv);
2416
2417 Newz (0, coro, 1, struct coro);
2418 coro->args = newAV ();
2419 coro->flags = CF_NEW;
2420
2421 av_extend (coro->args, items - 1);
2422 for (i = 1; i < items; i++)
2423 av_push (coro->args, newSVsv (ST (i)));
2424
2425 CvISXSUB_on (ncv);
2426 CvXSUBANY (ncv).any_ptr = (void *)coro;
2427
2428 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2429
2430 CvXSUB (ncv) = CvXSUB (xcv);
2431 CvANON_on (ncv);
2432
2433 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2434 RETVAL = newRV_noinc ((SV *)ncv);
2435}
2436 OUTPUT: 3761 OUTPUT:
2437 RETVAL 3762 RETVAL
2438 3763
2439#endif
2440
2441
2442MODULE = Coro::State PACKAGE = Coro::AIO
2443
2444void 3764void
2445_get_state (SV *self) 3765rouse_wait (...)
3766 PROTOTYPE: ;$
2446 PPCODE: 3767 PPCODE:
2447{ 3768 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2448 AV *defav = GvAV (PL_defgv);
2449 AV *av = newAV ();
2450 int i;
2451 SV *data_sv = newSV (sizeof (struct io_state));
2452 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2453 SvCUR_set (data_sv, sizeof (struct io_state));
2454 SvPOK_only (data_sv);
2455
2456 data->errorno = errno;
2457 data->laststype = PL_laststype;
2458 data->laststatval = PL_laststatval;
2459 data->statcache = PL_statcache;
2460
2461 av_extend (av, AvFILLp (defav) + 1 + 1);
2462
2463 for (i = 0; i <= AvFILLp (defav); ++i)
2464 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2465
2466 av_push (av, data_sv);
2467
2468 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2469
2470 api_ready (self);
2471}
2472 3769
2473void 3770void
2474_set_state (SV *state) 3771on_enter (SV *block)
3772 ALIAS:
3773 on_leave = 1
2475 PROTOTYPE: $ 3774 PROTOTYPE: &
3775 CODE:
3776{
3777 struct coro *coro = SvSTATE_current;
3778 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3779
3780 block = s_get_cv_croak (block);
3781
3782 if (!*avp)
3783 *avp = newAV ();
3784
3785 av_push (*avp, SvREFCNT_inc (block));
3786
3787 if (!ix)
3788 on_enterleave_call (aTHX_ block);
3789
3790 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3791 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3792 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3793}
3794
3795
3796MODULE = Coro::State PACKAGE = PerlIO::cede
3797
3798BOOT:
3799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3800
3801
3802MODULE = Coro::State PACKAGE = Coro::Semaphore
3803
3804SV *
3805new (SV *klass, SV *count = 0)
3806 CODE:
3807{
3808 int semcnt = 1;
3809
3810 if (count)
3811 {
3812 SvGETMAGIC (count);
3813
3814 if (SvOK (count))
3815 semcnt = SvIV (count);
3816 }
3817
3818 RETVAL = sv_bless (
3819 coro_waitarray_new (aTHX_ semcnt),
3820 GvSTASH (CvGV (cv))
3821 );
3822}
3823 OUTPUT:
3824 RETVAL
3825
3826# helper for Coro::Channel and others
3827SV *
3828_alloc (int count)
3829 CODE:
3830 RETVAL = coro_waitarray_new (aTHX_ count);
3831 OUTPUT:
3832 RETVAL
3833
3834SV *
3835count (SV *self)
3836 CODE:
3837 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3838 OUTPUT:
3839 RETVAL
3840
3841void
3842up (SV *self, int adjust = 1)
3843 ALIAS:
3844 adjust = 1
3845 CODE:
3846 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3847
3848void
3849down (...)
3850 CODE:
3851 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3852
3853void
3854wait (...)
3855 CODE:
3856 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3857
3858void
3859try (SV *self)
3860 PPCODE:
3861{
3862 AV *av = (AV *)SvRV (self);
3863 SV *count_sv = AvARRAY (av)[0];
3864 IV count = SvIVX (count_sv);
3865
3866 if (count > 0)
3867 {
3868 --count;
3869 SvIVX (count_sv) = count;
3870 XSRETURN_YES;
3871 }
3872 else
3873 XSRETURN_NO;
3874}
3875
3876void
3877waiters (SV *self)
3878 PPCODE:
3879{
3880 AV *av = (AV *)SvRV (self);
3881 int wcount = AvFILLp (av) + 1 - 1;
3882
3883 if (GIMME_V == G_SCALAR)
3884 XPUSHs (sv_2mortal (newSViv (wcount)));
3885 else
3886 {
3887 int i;
3888 EXTEND (SP, wcount);
3889 for (i = 1; i <= wcount; ++i)
3890 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3891 }
3892}
3893
3894MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3895
3896void
3897_may_delete (SV *sem, int count, int extra_refs)
2476 PPCODE: 3898 PPCODE:
2477{ 3899{
2478 AV *av = (AV *)SvRV (state); 3900 AV *av = (AV *)SvRV (sem);
2479 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2480 int i;
2481 3901
2482 errno = data->errorno; 3902 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2483 PL_laststype = data->laststype; 3903 && AvFILLp (av) == 0 /* no waiters, just count */
2484 PL_laststatval = data->laststatval; 3904 && SvIV (AvARRAY (av)[0]) == count)
2485 PL_statcache = data->statcache; 3905 XSRETURN_YES;
2486 3906
3907 XSRETURN_NO;
3908}
3909
3910MODULE = Coro::State PACKAGE = Coro::Signal
3911
3912SV *
3913new (SV *klass)
3914 CODE:
3915 RETVAL = sv_bless (
3916 coro_waitarray_new (aTHX_ 0),
3917 GvSTASH (CvGV (cv))
3918 );
3919 OUTPUT:
3920 RETVAL
3921
3922void
3923wait (...)
3924 CODE:
3925 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3926
3927void
3928broadcast (SV *self)
3929 CODE:
3930{
3931 AV *av = (AV *)SvRV (self);
3932 coro_signal_wake (aTHX_ av, AvFILLp (av));
3933}
3934
3935void
3936send (SV *self)
3937 CODE:
3938{
3939 AV *av = (AV *)SvRV (self);
3940
2487 EXTEND (SP, AvFILLp (av)); 3941 if (AvFILLp (av))
2488 for (i = 0; i < AvFILLp (av); ++i) 3942 coro_signal_wake (aTHX_ av, 1);
2489 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3943 else
3944 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2490} 3945}
3946
3947IV
3948awaited (SV *self)
3949 CODE:
3950 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3951 OUTPUT:
3952 RETVAL
2491 3953
2492 3954
2493MODULE = Coro::State PACKAGE = Coro::AnyEvent 3955MODULE = Coro::State PACKAGE = Coro::AnyEvent
2494 3956
2495BOOT: 3957BOOT:
2496 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3958 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2497 3959
2498SV * 3960void
2499_schedule (...) 3961_schedule (...)
2500 PROTOTYPE: @
2501 CODE: 3962 CODE:
2502{ 3963{
2503 static int incede; 3964 static int incede;
2504 3965
2505 api_cede_notself (); 3966 api_cede_notself (aTHX);
2506 3967
2507 ++incede; 3968 ++incede;
2508 while (coro_nready >= incede && api_cede ()) 3969 while (coro_nready >= incede && api_cede (aTHX))
2509 ; 3970 ;
2510 3971
2511 sv_setsv (sv_activity, &PL_sv_undef); 3972 sv_setsv (sv_activity, &PL_sv_undef);
2512 if (coro_nready >= incede) 3973 if (coro_nready >= incede)
2513 { 3974 {
2514 PUSHMARK (SP); 3975 PUSHMARK (SP);
2515 PUTBACK; 3976 PUTBACK;
2516 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3977 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2517 SPAGAIN;
2518 } 3978 }
2519 3979
2520 --incede; 3980 --incede;
2521} 3981}
2522 3982
2523 3983
2524MODULE = Coro::State PACKAGE = PerlIO::cede 3984MODULE = Coro::State PACKAGE = Coro::AIO
2525 3985
2526BOOT: 3986void
2527 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3987_register (char *target, char *proto, SV *req)
3988 CODE:
3989{
3990 SV *req_cv = s_get_cv_croak (req);
3991 /* newXSproto doesn't return the CV on 5.8 */
3992 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3993 sv_setpv ((SV *)slf_cv, proto);
3994 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3995}
2528 3996
3997MODULE = Coro::State PACKAGE = Coro::Select
3998
3999void
4000patch_pp_sselect ()
4001 CODE:
4002 if (!coro_old_pp_sselect)
4003 {
4004 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4005 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4006 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4007 }
4008
4009void
4010unpatch_pp_sselect ()
4011 CODE:
4012 if (coro_old_pp_sselect)
4013 {
4014 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4015 coro_old_pp_sselect = 0;
4016 }
4017

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