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Comparing Coro/Coro/State.xs (file contents):
Revision 1.263 by root, Wed Nov 12 04:49:06 2008 UTC vs.
Revision 1.398 by root, Sat May 7 14:11:10 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 BARRIER __asm__ __volatile__ ("" : : : "memory")
129# define expect(expr,value) __builtin_expect ((expr),(value)) 93# define expect(expr,value) __builtin_expect ((expr), (value))
130# define INLINE static inline 94# define INLINE static inline
131#else 95#else
132# define attribute(x) 96# define attribute(x)
133# define BARRIER
134# define expect(expr,value) (expr) 97# define expect(expr,value) (expr)
135# define INLINE static 98# define INLINE static
136#endif 99#endif
137 100
138#define expect_false(expr) expect ((expr) != 0, 0) 101#define expect_false(expr) expect ((expr) != 0, 0)
139#define expect_true(expr) expect ((expr) != 0, 1) 102#define expect_true(expr) expect ((expr) != 0, 1)
140 103
141#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
142 105
143#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
144 108
145#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
146
147static perl_mutex coro_lock;
148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
150# if CORO_PTHREAD 110# if CORO_PTHREAD
151static void *coro_thx; 111static void *coro_thx;
152# endif 112# endif
153
154#else
155
156# define LOCK (void)0
157# define UNLOCK (void)0
158
159#endif 113#endif
160 114
161# undef LOCK 115#ifdef __linux
162# define LOCK (void)0 116# include <time.h> /* for timespec */
163# undef UNLOCK 117# include <syscall.h> /* for SYS_* */
164# define UNLOCK (void)0 118# ifdef SYS_clock_gettime
165 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
166/* helper storage struct for Coro::AIO */ 120# define CORO_CLOCK_MONOTONIC 1
167struct io_state 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
168{ 122# endif
169 AV *res; 123#endif
170 int errorno;
171 I32 laststype; /* U16 in 5.10.0 */
172 int laststatval;
173 Stat_t statcache;
174};
175 124
176static 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);
131static void slf_destroy (pTHX_ struct coro *coro);
177 132
178static U32 cctx_gen; 133static U32 cctx_gen;
179static size_t cctx_stacksize = CORO_STACKSIZE; 134static size_t cctx_stacksize = CORO_STACKSIZE;
180static struct CoroAPI coroapi; 135static struct CoroAPI coroapi;
181static AV *main_mainstack; /* used to differentiate between $main and others */ 136static AV *main_mainstack; /* used to differentiate between $main and others */
182static JMPENV *main_top_env; 137static JMPENV *main_top_env;
183static HV *coro_state_stash, *coro_stash; 138static HV *coro_state_stash, *coro_stash;
184static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 139static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
185static volatile struct coro *transfer_next;
186 140
187struct transfer_args 141static AV *av_destroy; /* destruction queue */
188{ 142static SV *sv_manager; /* the manager coro */
189 struct coro *prev, *next; 143static SV *sv_idle; /* $Coro::idle */
190};
191 144
192static GV *irsgv; /* $/ */ 145static GV *irsgv; /* $/ */
193static GV *stdoutgv; /* *STDOUT */ 146static GV *stdoutgv; /* *STDOUT */
194static SV *rv_diehook; 147static SV *rv_diehook;
195static SV *rv_warnhook; 148static SV *rv_warnhook;
196static HV *hv_sig; /* %SIG */ 149static HV *hv_sig; /* %SIG */
197 150
198/* async_pool helper stuff */ 151/* async_pool helper stuff */
199static SV *sv_pool_rss; 152static SV *sv_pool_rss;
200static SV *sv_pool_size; 153static SV *sv_pool_size;
154static SV *sv_async_pool_idle; /* description string */
201static AV *av_async_pool; 155static AV *av_async_pool; /* idle pool */
156static SV *sv_Coro; /* class string */
157static CV *cv_pool_handler;
202 158
203/* Coro::AnyEvent */ 159/* Coro::AnyEvent */
204static SV *sv_activity; 160static SV *sv_activity;
161
162/* enable processtime/realtime profiling */
163static char enable_times;
164typedef U32 coro_ts[2];
165static coro_ts time_real, time_cpu;
166static char times_valid;
205 167
206static struct coro_cctx *cctx_first; 168static struct coro_cctx *cctx_first;
207static int cctx_count, cctx_idle; 169static int cctx_count, cctx_idle;
208 170
209enum { 171enum {
… …
214 CC_TRACE_LINE = 0x10, /* trace each statement */ 176 CC_TRACE_LINE = 0x10, /* trace each statement */
215 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 177 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
216}; 178};
217 179
218/* this is a structure representing a c-level coroutine */ 180/* this is a structure representing a c-level coroutine */
219typedef struct coro_cctx { 181typedef struct coro_cctx
182{
220 struct coro_cctx *next; 183 struct coro_cctx *next;
221 184
222 /* the stack */ 185 /* the stack */
223 void *sptr; 186 void *sptr;
224 size_t ssize; 187 size_t ssize;
… …
234 int valgrind_id; 197 int valgrind_id;
235#endif 198#endif
236 unsigned char flags; 199 unsigned char flags;
237} coro_cctx; 200} coro_cctx;
238 201
202static coro_cctx *cctx_current; /* the currently running cctx */
203
204/*****************************************************************************/
205
239enum { 206enum {
240 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
241 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
242 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
243 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
244}; 213};
245 214
246/* the structure where most of the perl state is stored, overlaid on the cxstack */ 215/* the structure where most of the perl state is stored, overlaid on the cxstack */
247typedef struct { 216typedef struct
217{
248 SV *defsv; 218 SV *defsv;
249 AV *defav; 219 AV *defav;
250 SV *errsv; 220 SV *errsv;
251 SV *irsgv; 221 SV *irsgv;
222 HV *hinthv;
252#define VAR(name,type) type name; 223#define VAR(name,type) type name;
253# include "state.h" 224# include "state.h"
254#undef VAR 225#undef VAR
255} perl_slots; 226} perl_slots;
256 227
228// how many context stack entries do we need for perl_slots
257#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
258 230
259/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
260struct coro { 232struct coro {
261 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the C coroutine allocated to this perl coroutine, if any */
262 coro_cctx *cctx; 234 coro_cctx *cctx;
263 235
264 /* process data */ 236 /* ready queue */
237 struct coro *next_ready;
238
239 /* state data */
240 struct CoroSLF slf_frame; /* saved slf frame */
265 AV *mainstack; 241 AV *mainstack;
266 perl_slots *slot; /* basically the saved sp */ 242 perl_slots *slot; /* basically the saved sp */
267 243
244 CV *startcv; /* the CV to execute */
268 AV *args; /* data associated with this coroutine (initial args) */ 245 AV *args; /* data associated with this coroutine (initial args) */
269 int refcnt; /* coroutines are refcounted, yes */ 246 int refcnt; /* coroutines are refcounted, yes */
270 int flags; /* CF_ flags */ 247 int flags; /* CF_ flags */
271 HV *hv; /* the perl hash associated with this coro, if any */ 248 HV *hv; /* the perl hash associated with this coro, if any */
272 249
273 /* statistics */ 250 /* statistics */
274 int usecount; /* number of transfers to this coro */ 251 int usecount; /* number of transfers to this coro */
275 252
276 /* coro process data */ 253 /* coro process data */
277 int prio; 254 int prio;
278 SV *throw; /* exception to be thrown */ 255 SV *except; /* exception to be thrown */
256 SV *rouse_cb;
279 257
280 /* async_pool */ 258 /* async_pool */
281 SV *saved_deffh; 259 SV *saved_deffh;
260 SV *invoke_cb;
261 AV *invoke_av;
262
263 /* on_enter/on_leave */
264 AV *on_enter;
265 AV *on_leave;
266
267 /* swap_sv */
268 AV *swap_sv;
269
270 /* times */
271 coro_ts t_cpu, t_real;
282 272
283 /* linked list */ 273 /* linked list */
284 struct coro *next, *prev; 274 struct coro *next, *prev;
285}; 275};
286 276
287typedef struct coro *Coro__State; 277typedef struct coro *Coro__State;
288typedef struct coro *Coro__State_or_hashref; 278typedef struct coro *Coro__State_or_hashref;
289 279
280/* the following variables are effectively part of the perl context */
281/* and get copied between struct coro and these variables */
282/* the main reason we don't support windows process emulation */
283static struct CoroSLF slf_frame; /* the current slf frame */
284
290/** Coro ********************************************************************/ 285/** Coro ********************************************************************/
291 286
292#define PRIO_MAX 3 287#define CORO_PRIO_MAX 3
293#define PRIO_HIGH 1 288#define CORO_PRIO_HIGH 1
294#define PRIO_NORMAL 0 289#define CORO_PRIO_NORMAL 0
295#define PRIO_LOW -1 290#define CORO_PRIO_LOW -1
296#define PRIO_IDLE -3 291#define CORO_PRIO_IDLE -3
297#define PRIO_MIN -4 292#define CORO_PRIO_MIN -4
298 293
299/* for Coro.pm */ 294/* for Coro.pm */
300static SV *coro_current; 295static SV *coro_current;
301static SV *coro_readyhook; 296static SV *coro_readyhook;
302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 297static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
303static int coro_nready; 298static CV *cv_coro_run;
304static struct coro *coro_first; 299static struct coro *coro_first;
300#define coro_nready coroapi.nready
301
302/** Coro::Select ************************************************************/
303
304static OP *(*coro_old_pp_sselect) (pTHX);
305static SV *coro_select_select;
306
307/* horrible hack, but if it works... */
308static OP *
309coro_pp_sselect (pTHX)
310{
311 dSP;
312 PUSHMARK (SP - 4); /* fake argument list */
313 XPUSHs (coro_select_select);
314 PUTBACK;
315
316 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
317 PL_op->op_flags |= OPf_STACKED;
318 PL_op->op_private = 0;
319 return PL_ppaddr [OP_ENTERSUB](aTHX);
320}
321
322/** time stuff **************************************************************/
323
324#ifdef HAS_GETTIMEOFDAY
325
326static void
327coro_u2time (pTHX_ UV ret[2])
328{
329 struct timeval tv;
330 gettimeofday (&tv, 0);
331
332 ret [0] = tv.tv_sec;
333 ret [1] = tv.tv_usec;
334}
335
336static double
337coro_nvtime ()
338{
339 struct timeval tv;
340 gettimeofday (&tv, 0);
341
342 return tv.tv_sec + tv.tv_usec * 1e-6;
343}
344
345static void
346time_init (pTHX)
347{
348 nvtime = coro_nvtime;
349 u2time = coro_u2time;
350}
351
352#else
353
354static void
355time_init (pTHX)
356{
357 SV **svp;
358
359 require_pv ("Time/HiRes.pm");
360
361 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
362
363 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
364 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
365
366 nvtime = INT2PTR (double (*)(), SvIV (*svp));
367
368 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
369 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
370}
371
372#endif
305 373
306/** lowlevel stuff **********************************************************/ 374/** lowlevel stuff **********************************************************/
307 375
308static SV * 376static SV *
309coro_get_sv (pTHX_ const char *name, int create) 377coro_get_sv (pTHX_ const char *name, int create)
… …
333 get_hv (name, create); 401 get_hv (name, create);
334#endif 402#endif
335 return get_hv (name, create); 403 return get_hv (name, create);
336} 404}
337 405
406INLINE void
407coro_times_update ()
408{
409#ifdef coro_clock_gettime
410 struct timespec ts;
411
412 ts.tv_sec = ts.tv_nsec = 0;
413 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
414 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
415
416 ts.tv_sec = ts.tv_nsec = 0;
417 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
418 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
419#else
420 dTHX;
421 UV tv[2];
422
423 u2time (aTHX_ tv);
424 time_real [0] = tv [0];
425 time_real [1] = tv [1] * 1000;
426#endif
427}
428
429INLINE void
430coro_times_add (struct coro *c)
431{
432 c->t_real [1] += time_real [1];
433 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
434 c->t_real [0] += time_real [0];
435
436 c->t_cpu [1] += time_cpu [1];
437 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
438 c->t_cpu [0] += time_cpu [0];
439}
440
441INLINE void
442coro_times_sub (struct coro *c)
443{
444 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
445 c->t_real [1] -= time_real [1];
446 c->t_real [0] -= time_real [0];
447
448 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
449 c->t_cpu [1] -= time_cpu [1];
450 c->t_cpu [0] -= time_cpu [0];
451}
452
453/*****************************************************************************/
454/* magic glue */
455
456#define CORO_MAGIC_type_cv 26
457#define CORO_MAGIC_type_state PERL_MAGIC_ext
458
459#define CORO_MAGIC_NN(sv, type) \
460 (expect_true (SvMAGIC (sv)->mg_type == type) \
461 ? SvMAGIC (sv) \
462 : mg_find (sv, type))
463
464#define CORO_MAGIC(sv, type) \
465 (expect_true (SvMAGIC (sv)) \
466 ? CORO_MAGIC_NN (sv, type) \
467 : 0)
468
469#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
470#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
471
472INLINE struct coro *
473SvSTATE_ (pTHX_ SV *coro)
474{
475 HV *stash;
476 MAGIC *mg;
477
478 if (SvROK (coro))
479 coro = SvRV (coro);
480
481 if (expect_false (SvTYPE (coro) != SVt_PVHV))
482 croak ("Coro::State object required");
483
484 stash = SvSTASH (coro);
485 if (expect_false (stash != coro_stash && stash != coro_state_stash))
486 {
487 /* very slow, but rare, check */
488 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
489 croak ("Coro::State object required");
490 }
491
492 mg = CORO_MAGIC_state (coro);
493 return (struct coro *)mg->mg_ptr;
494}
495
496#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
497
498/* faster than SvSTATE, but expects a coroutine hv */
499#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
500#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
501
502/*****************************************************************************/
503/* padlist management and caching */
504
338static AV * 505static AV *
339coro_clone_padlist (pTHX_ CV *cv) 506coro_derive_padlist (pTHX_ CV *cv)
340{ 507{
341 AV *padlist = CvPADLIST (cv); 508 AV *padlist = CvPADLIST (cv);
342 AV *newpadlist, *newpad; 509 AV *newpadlist, *newpad;
343 510
344 newpadlist = newAV (); 511 newpadlist = newAV ();
… …
349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 516 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
350#endif 517#endif
351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 518 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
352 --AvFILLp (padlist); 519 --AvFILLp (padlist);
353 520
354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 521 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
355 av_store (newpadlist, 1, (SV *)newpad); 522 av_store (newpadlist, 1, (SV *)newpad);
356 523
357 return newpadlist; 524 return newpadlist;
358} 525}
359 526
360static void 527static void
361free_padlist (pTHX_ AV *padlist) 528free_padlist (pTHX_ AV *padlist)
362{ 529{
363 /* may be during global destruction */ 530 /* may be during global destruction */
364 if (SvREFCNT (padlist)) 531 if (!IN_DESTRUCT)
365 { 532 {
366 I32 i = AvFILLp (padlist); 533 I32 i = AvFILLp (padlist);
367 while (i >= 0) 534
535 while (i > 0) /* special-case index 0 */
368 { 536 {
369 SV **svp = av_fetch (padlist, i--, FALSE); 537 /* we try to be extra-careful here */
370 if (svp) 538 AV *av = (AV *)AvARRAY (padlist)[i--];
371 { 539 I32 j = AvFILLp (av);
372 SV *sv; 540
373 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 541 while (j >= 0)
542 SvREFCNT_dec (AvARRAY (av)[j--]);
543
544 AvFILLp (av) = -1;
374 SvREFCNT_dec (sv); 545 SvREFCNT_dec (av);
375
376 SvREFCNT_dec (*svp);
377 }
378 } 546 }
379 547
548 SvREFCNT_dec (AvARRAY (padlist)[0]);
549
550 AvFILLp (padlist) = -1;
380 SvREFCNT_dec ((SV*)padlist); 551 SvREFCNT_dec ((SV*)padlist);
381 } 552 }
382} 553}
383 554
384static int 555static int
385coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 556coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
386{ 557{
387 AV *padlist; 558 AV *padlist;
388 AV *av = (AV *)mg->mg_obj; 559 AV *av = (AV *)mg->mg_obj;
560
561 /* perl manages to free our internal AV and _then_ call us */
562 if (IN_DESTRUCT)
563 return 0;
389 564
390 /* casting is fun. */ 565 /* casting is fun. */
391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 566 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
392 free_padlist (aTHX_ padlist); 567 free_padlist (aTHX_ padlist);
393 568
394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 569 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
395 570
396 return 0; 571 return 0;
397} 572}
398
399#define CORO_MAGIC_type_cv PERL_MAGIC_ext
400#define CORO_MAGIC_type_state PERL_MAGIC_ext
401 573
402static MGVTBL coro_cv_vtbl = { 574static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0, 575 0, 0, 0, 0,
404 coro_cv_free 576 coro_cv_free
405}; 577};
406
407#define CORO_MAGIC(sv, type) \
408 SvMAGIC (sv) \
409 ? SvMAGIC (sv)->mg_type == type \
410 ? SvMAGIC (sv) \
411 : mg_find (sv, type) \
412 : 0
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442 578
443/* the next two functions merely cache the padlists */ 579/* the next two functions merely cache the padlists */
444static void 580static void
445get_padlist (pTHX_ CV *cv) 581get_padlist (pTHX_ CV *cv)
446{ 582{
… …
452 else 588 else
453 { 589 {
454#if CORO_PREFER_PERL_FUNCTIONS 590#if CORO_PREFER_PERL_FUNCTIONS
455 /* this is probably cleaner? but also slower! */ 591 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */ 592 /* in practise, it seems to be less stable */
457 CV *cp = Perl_cv_clone (cv); 593 CV *cp = Perl_cv_clone (aTHX_ cv);
458 CvPADLIST (cv) = CvPADLIST (cp); 594 CvPADLIST (cv) = CvPADLIST (cp);
459 CvPADLIST (cp) = 0; 595 CvPADLIST (cp) = 0;
460 SvREFCNT_dec (cp); 596 SvREFCNT_dec (cp);
461#else 597#else
462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 598 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
463#endif 599#endif
464 } 600 }
465} 601}
466 602
467static void 603static void
… …
474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 610 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
475 611
476 av = (AV *)mg->mg_obj; 612 av = (AV *)mg->mg_obj;
477 613
478 if (expect_false (AvFILLp (av) >= AvMAX (av))) 614 if (expect_false (AvFILLp (av) >= AvMAX (av)))
479 av_extend (av, AvMAX (av) + 1); 615 av_extend (av, AvFILLp (av) + 1);
480 616
481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 617 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
482} 618}
483 619
484/** load & save, init *******************************************************/ 620/** load & save, init *******************************************************/
621
622/* swap sv heads, at least logically */
623static void
624swap_svs (pTHX_ Coro__State c)
625{
626 int i;
627
628 for (i = 0; i <= AvFILLp (c->swap_sv); )
629 {
630 SV *a = AvARRAY (c->swap_sv)[i++];
631 SV *b = AvARRAY (c->swap_sv)[i++];
632
633 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
634 SV tmp;
635
636 /* swap sv_any */
637 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
638
639 /* swap sv_flags */
640 SvFLAGS (&tmp) = SvFLAGS (a);
641 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
642 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
643
644#if PERL_VERSION_ATLEAST (5,10,0)
645 /* perl 5.10 complicates this _quite_ a bit, but it also is
646 * much faster, so no quarrels here. alternatively, we could
647 * sv_upgrade to avoid this.
648 */
649 {
650 /* swap sv_u */
651 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
652
653 /* if SvANY points to the head, we need to adjust the pointers,
654 * as the pointer for a still points to b, and maybe vice versa.
655 */
656 #define svany_in_head(type) \
657 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
658
659 if (svany_in_head (SvTYPE (a)))
660 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
661
662 if (svany_in_head (SvTYPE (b)))
663 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
664 }
665#endif
666 }
667}
668
669#define SWAP_SVS(coro) \
670 if (expect_false ((coro)->swap_sv)) \
671 swap_svs (aTHX_ (coro))
672
673static void
674on_enterleave_call (pTHX_ SV *cb);
485 675
486static void 676static void
487load_perl (pTHX_ Coro__State c) 677load_perl (pTHX_ Coro__State c)
488{ 678{
489 perl_slots *slot = c->slot; 679 perl_slots *slot = c->slot;
490 c->slot = 0; 680 c->slot = 0;
491 681
492 PL_mainstack = c->mainstack; 682 PL_mainstack = c->mainstack;
493 683
494 GvSV (PL_defgv) = slot->defsv; 684 GvSV (PL_defgv) = slot->defsv;
495 GvAV (PL_defgv) = slot->defav; 685 GvAV (PL_defgv) = slot->defav;
496 GvSV (PL_errgv) = slot->errsv; 686 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv; 687 GvSV (irsgv) = slot->irsgv;
688 GvHV (PL_hintgv) = slot->hinthv;
498 689
499 #define VAR(name,type) PL_ ## name = slot->name; 690 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h" 691 # include "state.h"
501 #undef VAR 692 #undef VAR
502 693
… …
513 CvPADLIST (cv) = (AV *)POPs; 704 CvPADLIST (cv) = (AV *)POPs;
514 } 705 }
515 706
516 PUTBACK; 707 PUTBACK;
517 } 708 }
709
710 slf_frame = c->slf_frame;
711 CORO_THROW = c->except;
712
713 if (expect_false (enable_times))
714 {
715 if (expect_false (!times_valid))
716 coro_times_update ();
717
718 coro_times_sub (c);
719 }
720
721 if (expect_false (c->on_enter))
722 {
723 int i;
724
725 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
726 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
727 }
728
729 SWAP_SVS (c);
518} 730}
519 731
520static void 732static void
521save_perl (pTHX_ Coro__State c) 733save_perl (pTHX_ Coro__State c)
522{ 734{
735 SWAP_SVS (c);
736
737 if (expect_false (c->on_leave))
738 {
739 int i;
740
741 for (i = AvFILLp (c->on_leave); i >= 0; --i)
742 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
743 }
744
745 times_valid = 0;
746
747 if (expect_false (enable_times))
748 {
749 coro_times_update (); times_valid = 1;
750 coro_times_add (c);
751 }
752
753 c->except = CORO_THROW;
754 c->slf_frame = slf_frame;
755
523 { 756 {
524 dSP; 757 dSP;
525 I32 cxix = cxstack_ix; 758 I32 cxix = cxstack_ix;
526 PERL_CONTEXT *ccstk = cxstack; 759 PERL_CONTEXT *ccstk = cxstack;
527 PERL_SI *top_si = PL_curstackinfo; 760 PERL_SI *top_si = PL_curstackinfo;
… …
537 { 770 {
538 while (expect_true (cxix >= 0)) 771 while (expect_true (cxix >= 0))
539 { 772 {
540 PERL_CONTEXT *cx = &ccstk[cxix--]; 773 PERL_CONTEXT *cx = &ccstk[cxix--];
541 774
542 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 775 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
543 { 776 {
544 CV *cv = cx->blk_sub.cv; 777 CV *cv = cx->blk_sub.cv;
545 778
546 if (expect_true (CvDEPTH (cv))) 779 if (expect_true (CvDEPTH (cv)))
547 { 780 {
… …
566 799
567 PUTBACK; 800 PUTBACK;
568 } 801 }
569 802
570 /* allocate some space on the context stack for our purposes */ 803 /* allocate some space on the context stack for our purposes */
571 /* we manually unroll here, as usually 2 slots is enough */ 804 if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
572 if (SLOT_COUNT >= 1) CXINC;
573 if (SLOT_COUNT >= 2) CXINC;
574 if (SLOT_COUNT >= 3) CXINC;
575 { 805 {
576 int i; 806 unsigned int i;
807
577 for (i = 3; i < SLOT_COUNT; ++i) 808 for (i = 0; i < SLOT_COUNT; ++i)
578 CXINC; 809 CXINC;
579 } 810
580 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 811 cxstack_ix -= SLOT_COUNT; /* undo allocation */
812 }
581 813
582 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
583 815
584 { 816 {
585 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
586 818
587 slot->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
588 slot->defsv = DEFSV; 820 slot->defsv = DEFSV;
589 slot->errsv = ERRSV; 821 slot->errsv = ERRSV;
590 slot->irsgv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
591 824
592 #define VAR(name,type) slot->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
593 # include "state.h" 826 # include "state.h"
594 #undef VAR 827 #undef VAR
595 } 828 }
596} 829}
597 830
598/* 831/*
599 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
600 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
601 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
602 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
603 */ 836 */
604#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
605# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
606#else 839#else
607static void 840static void
608coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
609{ 842{
610 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
611 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
612 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
613 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
614 847
615 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
… …
673#if !PERL_VERSION_ATLEAST (5,10,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
674 Safefree (PL_retstack); 907 Safefree (PL_retstack);
675#endif 908#endif
676} 909}
677 910
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
678static size_t 920static size_t
679coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
680{ 922{
681 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
682 924
683 if (coro->mainstack) 925 if (coro->mainstack)
684 { 926 {
685 perl_slots tmp_slot;
686 perl_slots *slot;
687
688 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
689 { 928 {
690 slot = &tmp_slot; 929 #define SYM(sym) PL_ ## sym
691 930 CORO_RSS;
692 #define VAR(name,type) slot->name = PL_ ## name;
693 # include "state.h"
694 #undef VAR 931 #undef SYM
695 } 932 }
696 else 933 else
697 slot = coro->slot;
698
699 if (slot)
700 { 934 {
701 rss += sizeof (slot->curstackinfo); 935 #define SYM(sym) coro->slot->sym
702 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 936 CORO_RSS;
703 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 937 #undef SYM
704 rss += slot->tmps_max * sizeof (SV *);
705 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
706 rss += slot->scopestack_max * sizeof (I32);
707 rss += slot->savestack_max * sizeof (ANY);
708
709#if !PERL_VERSION_ATLEAST (5,10,0)
710 rss += slot->retstack_max * sizeof (OP *);
711#endif
712 } 938 }
713 } 939 }
714 940
715 return rss; 941 return rss;
716} 942}
… …
726#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ 952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
727 SvPV_nolen((SV*)((mg)->mg_ptr)) : \ 953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
728 (const char*)(mg)->mg_ptr) 954 (const char*)(mg)->mg_ptr)
729#endif 955#endif
730 956
731/* we sometimes need to create the effect of entersub calling us */
732#define ENTERSUB_HEAD ENTER; SAVETMPS
733/* we somtimes need to create the effect of leaving via entersub */
734#define ENTERSUB_TAIL LEAVE
735
736/* 957/*
737 * This overrides the default magic get method of %SIG elements. 958 * This overrides the default magic get method of %SIG elements.
738 * 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
739 * 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
740 * readback here. 961 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */ 962 */
745static int 963static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{ 965{
748 const char *s = MgPV_nolen_const (mg); 966 const char *s = MgPV_nolen_const (mg);
… …
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802 1020
803 if (svp) 1021 if (svp)
804 { 1022 {
805 SV *old = *svp; 1023 SV *old = *svp;
806 *svp = newSVsv (sv); 1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
807 SvREFCNT_dec (old); 1025 SvREFCNT_dec (old);
808 return 0; 1026 return 0;
809 } 1027 }
810 } 1028 }
811 1029
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813} 1031}
814 1032
815static 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 */
816coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
817{ 1056{
818 /* 1057 /*
819 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
820 */ 1059 */
821 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
822 1061
823 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
824 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
825 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
826 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
827 PL_curpm = 0; 1069 PL_curpm = 0;
828 PL_curpad = 0; 1070 PL_curpad = 0;
829 PL_localizing = 0; 1071 PL_localizing = 0;
830 PL_dirty = 0;
831 PL_restartop = 0; 1072 PL_restartop = 0;
832#if PERL_VERSION_ATLEAST (5,10,0) 1073#if PERL_VERSION_ATLEAST (5,10,0)
833 PL_parser = 0; 1074 PL_parser = 0;
834#endif 1075#endif
1076 PL_hints = 0;
835 1077
836 /* recreate the die/warn hooks */ 1078 /* recreate the die/warn hooks */
837 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 );
838 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);
839 1081
840 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
841 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
842 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
843 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;
844 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
845 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
846 1089
847 { 1090 {
848 dSP; 1091 dSP;
849 UNOP myop; 1092 UNOP myop;
850 1093
851 Zero (&myop, 1, UNOP); 1094 Zero (&myop, 1, UNOP);
852 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
853 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
854 1098
855 PUSHMARK (SP); 1099 PUSHMARK (SP);
856 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1100 PUSHs ((SV *)coro->startcv);
857 PUTBACK; 1101 PUTBACK;
858 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
859 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
860 SPAGAIN;
861 } 1104 }
862 1105
863 /* 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
864 * likely was suspended in set_stacklevel, called from entersub. 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
865 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
866 * so we ENTER here for symmetry.
867 */ 1108 */
868 ENTERSUB_HEAD; 1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
869} 1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
870 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
871static void 1132static void
872coro_destruct (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
873{ 1134{
874 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
875 { 1136 {
876 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
877 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
885 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
886 1147
887 /* unwind main stack */ 1148 /* unwind main stack */
888 dounwind (-1); 1149 dounwind (-1);
889 } 1150 }
1151}
890 1152
891 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
892 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
893 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
894 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
895 SvREFCNT_dec (PL_rs);
896 SvREFCNT_dec (GvSV (irsgv));
897 1157
898 SvREFCNT_dec (PL_diehook);
899 SvREFCNT_dec (PL_warnhook);
900 1158 {
1159 SV *old_current = SvRV (coro_current);
1160 struct coro *current = SvSTATE (old_current);
1161
1162 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1163
1164 save_perl (aTHX_ current);
1165
1166 /* this will cause transfer_check to croak on block*/
1167 SvRV_set (coro_current, (SV *)coro->hv);
1168
1169 load_perl (aTHX_ coro);
1170
1171 coro_unwind_stacks (aTHX);
1172 coro_destruct_stacks (aTHX);
1173
1174 /* restore swapped sv's */
1175 SWAP_SVS (coro);
1176
1177 // now save some sv's to be free'd later
1178 svf [0] = GvSV (PL_defgv);
1179 svf [1] = (SV *)GvAV (PL_defgv);
1180 svf [2] = GvSV (PL_errgv);
1181 svf [3] = (SV *)PL_defoutgv;
1182 svf [4] = PL_rs;
1183 svf [5] = GvSV (irsgv);
1184 svf [6] = (SV *)GvHV (PL_hintgv);
1185 svf [7] = PL_diehook;
1186 svf [8] = PL_warnhook;
1187 assert (9 == sizeof (svf) / sizeof (*svf));
1188
1189 SvRV_set (coro_current, old_current);
1190
1191 load_perl (aTHX_ current);
1192 }
1193
1194 {
1195 unsigned int i;
1196
1197 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1198 SvREFCNT_dec (svf [i]);
1199
901 SvREFCNT_dec (coro->saved_deffh); 1200 SvREFCNT_dec (coro->saved_deffh);
902 SvREFCNT_dec (coro->throw); 1201 SvREFCNT_dec (coro->rouse_cb);
903 1202 SvREFCNT_dec (coro->invoke_cb);
904 coro_destruct_stacks (aTHX); 1203 SvREFCNT_dec (coro->invoke_av);
1204 }
905} 1205}
906 1206
907INLINE void 1207INLINE void
908free_coro_mortal (pTHX) 1208free_coro_mortal (pTHX)
909{ 1209{
… …
917static int 1217static int
918runops_trace (pTHX) 1218runops_trace (pTHX)
919{ 1219{
920 COP *oldcop = 0; 1220 COP *oldcop = 0;
921 int oldcxix = -2; 1221 int oldcxix = -2;
922 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
923 coro_cctx *cctx = coro->cctx;
924 1222
925 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1223 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
926 { 1224 {
927 PERL_ASYNC_CHECK (); 1225 PERL_ASYNC_CHECK ();
928 1226
929 if (cctx->flags & CC_TRACE_ALL) 1227 if (cctx_current->flags & CC_TRACE_ALL)
930 { 1228 {
931 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1229 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
932 { 1230 {
933 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1231 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
934 SV **bot, **top; 1232 SV **bot, **top;
935 AV *av = newAV (); /* return values */ 1233 AV *av = newAV (); /* return values */
936 SV **cb; 1234 SV **cb;
… …
973 1271
974 if (PL_curcop != &PL_compiling) 1272 if (PL_curcop != &PL_compiling)
975 { 1273 {
976 SV **cb; 1274 SV **cb;
977 1275
978 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1276 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
979 { 1277 {
980 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1278 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
981 1279
982 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1280 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
983 { 1281 {
984 runops_proc_t old_runops = PL_runops;
985 dSP; 1282 dSP;
986 GV *gv = CvGV (cx->blk_sub.cv); 1283 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0)); 1284 SV *fullname = sv_2mortal (newSV (0));
988 1285
989 if (isGV (gv)) 1286 if (isGV (gv))
… …
994 SAVETMPS; 1291 SAVETMPS;
995 EXTEND (SP, 3); 1292 EXTEND (SP, 3);
996 PUSHMARK (SP); 1293 PUSHMARK (SP);
997 PUSHs (&PL_sv_yes); 1294 PUSHs (&PL_sv_yes);
998 PUSHs (fullname); 1295 PUSHs (fullname);
999 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1296 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1000 PUTBACK; 1297 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1298 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1002 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1299 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1003 SPAGAIN; 1300 SPAGAIN;
1004 FREETMPS; 1301 FREETMPS;
… …
1007 } 1304 }
1008 1305
1009 oldcxix = cxstack_ix; 1306 oldcxix = cxstack_ix;
1010 } 1307 }
1011 1308
1012 if (cctx->flags & CC_TRACE_LINE) 1309 if (cctx_current->flags & CC_TRACE_LINE)
1013 { 1310 {
1014 dSP; 1311 dSP;
1015 1312
1016 PL_runops = RUNOPS_DEFAULT; 1313 PL_runops = RUNOPS_DEFAULT;
1017 ENTER; 1314 ENTER;
… …
1036 1333
1037 TAINT_NOT; 1334 TAINT_NOT;
1038 return 0; 1335 return 0;
1039} 1336}
1040 1337
1338static struct CoroSLF cctx_ssl_frame;
1339
1041static void 1340static void
1042prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1341slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1043{ 1342{
1044 ta->prev = (struct coro *)cctx;
1045 ta->next = 0; 1343 ta->prev = 0;
1046} 1344}
1047 1345
1048/* inject a fake call to Coro::State::_cctx_init into the execution */ 1346static int
1049/* _cctx_init should be careful, as it could be called at almost any time */ 1347slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1050/* during execution of a perl program */ 1348{
1051/* also initialises PL_top_env */ 1349 *frame = cctx_ssl_frame;
1350
1351 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1352}
1353
1354/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1052static void NOINLINE 1355static void NOINLINE
1053cctx_prepare (pTHX_ coro_cctx *cctx) 1356cctx_prepare (pTHX)
1054{ 1357{
1055 dSP;
1056 UNOP myop;
1057
1058 PL_top_env = &PL_start_env; 1358 PL_top_env = &PL_start_env;
1059 1359
1060 if (cctx->flags & CC_TRACE) 1360 if (cctx_current->flags & CC_TRACE)
1061 PL_runops = runops_trace; 1361 PL_runops = runops_trace;
1062 1362
1063 Zero (&myop, 1, UNOP); 1363 /* we already must be executing an SLF op, there is no other valid way
1064 myop.op_next = PL_op; 1364 * that can lead to creation of a new cctx */
1065 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1365 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1366 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1066 1367
1067 PUSHMARK (SP); 1368 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1068 EXTEND (SP, 2); 1369 cctx_ssl_frame = slf_frame;
1069 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1370
1070 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1371 slf_frame.prepare = slf_prepare_set_stacklevel;
1071 PUTBACK; 1372 slf_frame.check = slf_check_set_stacklevel;
1072 PL_op = (OP *)&myop;
1073 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1074 SPAGAIN;
1075} 1373}
1076 1374
1077/* the tail of transfer: execute stuff we can only do after a transfer */ 1375/* the tail of transfer: execute stuff we can only do after a transfer */
1078INLINE void 1376INLINE void
1079transfer_tail (pTHX) 1377transfer_tail (pTHX)
1080{ 1378{
1081 struct coro *next = (struct coro *)transfer_next;
1082 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1083 assert (("FATAL: transfer_next was zero in transfer_tail (please report)", next));
1084
1085 free_coro_mortal (aTHX); 1379 free_coro_mortal (aTHX);
1086 UNLOCK;
1087
1088 if (expect_false (next->throw))
1089 {
1090 SV *exception = sv_2mortal (next->throw);
1091
1092 next->throw = 0;
1093 sv_setsv (ERRSV, exception);
1094 croak (0);
1095 }
1096} 1380}
1097 1381
1098/* 1382/*
1099 * this is a _very_ stripped down perl interpreter ;) 1383 * this is a _very_ stripped down perl interpreter ;)
1100 */ 1384 */
… …
1107# endif 1391# endif
1108#endif 1392#endif
1109 { 1393 {
1110 dTHX; 1394 dTHX;
1111 1395
1112 /* entersub called ENTER, but we never 'returned', undo that here */ 1396 /* normally we would need to skip the entersub here */
1113 ENTERSUB_TAIL; 1397 /* not doing so will re-execute it, which is exactly what we want */
1114
1115 /* we now skip the entersub that did lead to transfer() */
1116 PL_op = PL_op->op_next; 1398 /* PL_nop = PL_nop->op_next */
1117 1399
1118 /* inject a fake subroutine call to cctx_init */ 1400 /* inject a fake subroutine call to cctx_init */
1119 cctx_prepare (aTHX_ (coro_cctx *)arg); 1401 cctx_prepare (aTHX);
1120 1402
1121 /* cctx_run is the alternative tail of transfer() */ 1403 /* cctx_run is the alternative tail of transfer() */
1122 transfer_tail (aTHX); 1404 transfer_tail (aTHX);
1123 1405
1124 /* somebody or something will hit me for both perl_run and PL_restartop */ 1406 /* somebody or something will hit me for both perl_run and PL_restartop */
1125 PL_restartop = PL_op; 1407 PL_restartop = PL_op;
1126 perl_run (PL_curinterp); 1408 perl_run (PL_curinterp);
1409 /*
1410 * Unfortunately, there is no way to get at the return values of the
1411 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1412 * runtime errors here, as this is just a random interpreter, not a thread.
1413 */
1127 1414
1128 /* 1415 /*
1129 * If perl-run returns we assume exit() was being called or the coro 1416 * If perl-run returns we assume exit() was being called or the coro
1130 * fell off the end, which seems to be the only valid (non-bug) 1417 * fell off the end, which seems to be the only valid (non-bug)
1131 * reason for perl_run to return. We try to exit by jumping to the 1418 * reason for perl_run to return. We try to exit by jumping to the
1132 * bootstrap-time "top" top_env, as we cannot restore the "main" 1419 * bootstrap-time "top" top_env, as we cannot restore the "main"
1133 * coroutine as Coro has no such concept 1420 * coroutine as Coro has no such concept.
1421 * This actually isn't valid with the pthread backend, but OSes requiring
1422 * that backend are too broken to do it in a standards-compliant way.
1134 */ 1423 */
1135 PL_top_env = main_top_env; 1424 PL_top_env = main_top_env;
1136 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1425 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1137 } 1426 }
1138} 1427}
… …
1192 cctx->ssize = cctx_stacksize * (long)sizeof (long); 1481 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1193 New (0, cctx->sptr, cctx_stacksize, long); 1482 New (0, cctx->sptr, cctx_stacksize, long);
1194 1483
1195 if (!cctx->sptr) 1484 if (!cctx->sptr)
1196 { 1485 {
1197 perror ("FATAL: unable to allocate stack for coroutine"); 1486 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1198 _exit (EXIT_FAILURE); 1487 _exit (EXIT_FAILURE);
1199 } 1488 }
1200 1489
1201 stack_start = cctx->sptr; 1490 stack_start = cctx->sptr;
1202 stack_size = cctx->ssize; 1491 stack_size = cctx->ssize;
… …
1214static void 1503static void
1215cctx_destroy (coro_cctx *cctx) 1504cctx_destroy (coro_cctx *cctx)
1216{ 1505{
1217 if (!cctx) 1506 if (!cctx)
1218 return; 1507 return;
1508
1509 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1219 1510
1220 --cctx_count; 1511 --cctx_count;
1221 coro_destroy (&cctx->cctx); 1512 coro_destroy (&cctx->cctx);
1222 1513
1223 /* coro_transfer creates new, empty cctx's */ 1514 /* coro_transfer creates new, empty cctx's */
… …
1282/** coroutine switching *****************************************************/ 1573/** coroutine switching *****************************************************/
1283 1574
1284static void 1575static void
1285transfer_check (pTHX_ struct coro *prev, struct coro *next) 1576transfer_check (pTHX_ struct coro *prev, struct coro *next)
1286{ 1577{
1578 /* TODO: throwing up here is considered harmful */
1579
1287 if (expect_true (prev != next)) 1580 if (expect_true (prev != next))
1288 { 1581 {
1289 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1582 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1290 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1583 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1291 1584
1292 if (expect_false (next->flags & CF_RUNNING))
1293 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1294
1295 if (expect_false (next->flags & CF_DESTROYED)) 1585 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1296 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1586 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1297 1587
1298#if !PERL_VERSION_ATLEAST (5,10,0) 1588#if !PERL_VERSION_ATLEAST (5,10,0)
1299 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1589 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1300 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1590 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1301#endif 1591#endif
1302 } 1592 }
1303} 1593}
1304 1594
1305/* always use the TRANSFER macro */ 1595/* always use the TRANSFER macro */
1306static void NOINLINE 1596static void NOINLINE /* noinline so we have a fixed stackframe */
1307transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1597transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1308{ 1598{
1309 dSTACKLEVEL; 1599 dSTACKLEVEL;
1310 1600
1311 /* sometimes transfer is only called to set idle_sp */ 1601 /* sometimes transfer is only called to set idle_sp */
1312 if (expect_false (!next)) 1602 if (expect_false (!prev))
1313 { 1603 {
1314 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1604 cctx_current->idle_sp = STACKLEVEL;
1315 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1605 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1316 } 1606 }
1317 else if (expect_true (prev != next)) 1607 else if (expect_true (prev != next))
1318 { 1608 {
1319 coro_cctx *prev__cctx; 1609 coro_cctx *cctx_prev;
1320 1610
1321 if (expect_false (prev->flags & CF_NEW)) 1611 if (expect_false (prev->flags & CF_NEW))
1322 { 1612 {
1323 /* create a new empty/source context */ 1613 /* create a new empty/source context */
1324 prev->cctx = cctx_new_empty ();
1325 prev->flags &= ~CF_NEW; 1614 prev->flags &= ~CF_NEW;
1326 prev->flags |= CF_RUNNING; 1615 prev->flags |= CF_RUNNING;
1327 } 1616 }
1328 1617
1329 prev->flags &= ~CF_RUNNING; 1618 prev->flags &= ~CF_RUNNING;
1330 next->flags |= CF_RUNNING; 1619 next->flags |= CF_RUNNING;
1331
1332 LOCK;
1333 1620
1334 /* first get rid of the old state */ 1621 /* first get rid of the old state */
1335 save_perl (aTHX_ prev); 1622 save_perl (aTHX_ prev);
1336 1623
1337 if (expect_false (next->flags & CF_NEW)) 1624 if (expect_false (next->flags & CF_NEW))
1338 { 1625 {
1339 /* need to start coroutine */ 1626 /* need to start coroutine */
1340 next->flags &= ~CF_NEW; 1627 next->flags &= ~CF_NEW;
1341 /* setup coroutine call */ 1628 /* setup coroutine call */
1342 coro_setup (aTHX_ next); 1629 init_perl (aTHX_ next);
1343 } 1630 }
1344 else 1631 else
1345 load_perl (aTHX_ next); 1632 load_perl (aTHX_ next);
1346 1633
1347 prev__cctx = prev->cctx;
1348
1349 /* possibly untie and reuse the cctx */ 1634 /* possibly untie and reuse the cctx */
1350 if (expect_true ( 1635 if (expect_true (
1351 prev__cctx->idle_sp == STACKLEVEL 1636 cctx_current->idle_sp == STACKLEVEL
1352 && !(prev__cctx->flags & CC_TRACE) 1637 && !(cctx_current->flags & CC_TRACE)
1353 && !force_cctx 1638 && !force_cctx
1354 )) 1639 ))
1355 { 1640 {
1356 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1641 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1357 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1642 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1358 1643
1359 prev->cctx = 0;
1360
1361 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1644 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1362 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1645 /* without this the next cctx_get might destroy the running cctx while still in use */
1363 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1646 if (expect_false (CCTX_EXPIRED (cctx_current)))
1364 if (!next->cctx) 1647 if (expect_true (!next->cctx))
1365 next->cctx = cctx_get (aTHX); 1648 next->cctx = cctx_get (aTHX);
1366 1649
1367 cctx_put (prev__cctx); 1650 cctx_put (cctx_current);
1368 } 1651 }
1652 else
1653 prev->cctx = cctx_current;
1369 1654
1370 ++next->usecount; 1655 ++next->usecount;
1371 1656
1372 if (expect_true (!next->cctx)) 1657 cctx_prev = cctx_current;
1373 next->cctx = cctx_get (aTHX); 1658 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1374 1659
1375 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1660 next->cctx = 0;
1376 transfer_next = next;
1377 1661
1378 if (expect_false (prev__cctx != next->cctx)) 1662 if (expect_false (cctx_prev != cctx_current))
1379 { 1663 {
1380 prev__cctx->top_env = PL_top_env; 1664 cctx_prev->top_env = PL_top_env;
1381 PL_top_env = next->cctx->top_env; 1665 PL_top_env = cctx_current->top_env;
1382 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1666 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1383 } 1667 }
1384 1668
1385 transfer_tail (aTHX); 1669 transfer_tail (aTHX);
1386 } 1670 }
1387} 1671}
… …
1389#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1673#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1390#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1674#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1391 1675
1392/** high level stuff ********************************************************/ 1676/** high level stuff ********************************************************/
1393 1677
1394static int 1678static void
1395coro_state_destroy (pTHX_ struct coro *coro) 1679coro_state_destroy (pTHX_ struct coro *coro)
1396{ 1680{
1397 if (coro->flags & CF_DESTROYED) 1681 if (coro->flags & CF_DESTROYED)
1398 return 0; 1682 return;
1683
1684 slf_destroy (aTHX_ coro);
1399 1685
1400 coro->flags |= CF_DESTROYED; 1686 coro->flags |= CF_DESTROYED;
1401 1687
1402 if (coro->flags & CF_READY) 1688 if (coro->flags & CF_READY)
1403 { 1689 {
1404 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1690 /* reduce nready, as destroying a ready coro effectively unreadies it */
1405 /* alternative: look through all ready queues and remove the coro */ 1691 /* alternative: look through all ready queues and remove the coro */
1406 LOCK;
1407 --coro_nready; 1692 --coro_nready;
1408 UNLOCK;
1409 } 1693 }
1410 else 1694 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1695 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412 1696
1413 if (coro->mainstack && coro->mainstack != main_mainstack) 1697 if (coro->mainstack
1414 { 1698 && coro->mainstack != main_mainstack
1415 struct coro temp; 1699 && coro->slot
1416 1700 && !PL_dirty)
1417 if (coro->flags & CF_RUNNING)
1418 croak ("FATAL: tried to destroy currently running coroutine");
1419
1420 save_perl (aTHX_ &temp);
1421 load_perl (aTHX_ coro); 1701 destroy_perl (aTHX_ coro);
1422
1423 coro_destruct (aTHX_ coro);
1424
1425 load_perl (aTHX_ &temp);
1426
1427 coro->slot = 0;
1428 }
1429
1430 cctx_destroy (coro->cctx);
1431 SvREFCNT_dec (coro->args);
1432 1702
1433 if (coro->next) coro->next->prev = coro->prev; 1703 if (coro->next) coro->next->prev = coro->prev;
1434 if (coro->prev) coro->prev->next = coro->next; 1704 if (coro->prev) coro->prev->next = coro->next;
1435 if (coro == coro_first) coro_first = coro->next; 1705 if (coro == coro_first) coro_first = coro->next;
1436 1706
1437 return 1; 1707 cctx_destroy (coro->cctx);
1708 SvREFCNT_dec (coro->startcv);
1709 SvREFCNT_dec (coro->args);
1710 SvREFCNT_dec (coro->swap_sv);
1711 SvREFCNT_dec (CORO_THROW);
1438} 1712}
1439 1713
1440static int 1714static int
1441coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1715coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1442{ 1716{
… …
1474# define MGf_DUP 0 1748# define MGf_DUP 0
1475#endif 1749#endif
1476}; 1750};
1477 1751
1478static void 1752static void
1479prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1753prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1480{ 1754{
1481 ta->prev = SvSTATE (prev_sv); 1755 ta->prev = SvSTATE (prev_sv);
1482 ta->next = SvSTATE (next_sv); 1756 ta->next = SvSTATE (next_sv);
1483 TRANSFER_CHECK (*ta); 1757 TRANSFER_CHECK (*ta);
1484} 1758}
1485 1759
1486static void 1760static void
1487api_transfer (SV *prev_sv, SV *next_sv) 1761api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1488{ 1762{
1489 dTHX;
1490 struct transfer_args ta; 1763 struct coro_transfer_args ta;
1491 1764
1492 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1765 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1493 TRANSFER (ta, 1); 1766 TRANSFER (ta, 1);
1494} 1767}
1495 1768
1496/** Coro ********************************************************************/ 1769/** Coro ********************************************************************/
1497 1770
1498static void 1771INLINE void
1499coro_enq (pTHX_ SV *coro_sv) 1772coro_enq (pTHX_ struct coro *coro)
1500{ 1773{
1501 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1774 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1502}
1503 1775
1504static SV * 1776 SvREFCNT_inc_NN (coro->hv);
1777
1778 coro->next_ready = 0;
1779 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1780 ready [1] = coro;
1781}
1782
1783INLINE struct coro *
1505coro_deq (pTHX) 1784coro_deq (pTHX)
1506{ 1785{
1507 int prio; 1786 int prio;
1508 1787
1509 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1788 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1510 if (AvFILLp (coro_ready [prio]) >= 0) 1789 {
1511 return av_shift (coro_ready [prio]); 1790 struct coro **ready = coro_ready [prio];
1791
1792 if (ready [0])
1793 {
1794 struct coro *coro = ready [0];
1795 ready [0] = coro->next_ready;
1796 return coro;
1797 }
1798 }
1512 1799
1513 return 0; 1800 return 0;
1514} 1801}
1515 1802
1803static void
1804invoke_sv_ready_hook_helper (void)
1805{
1806 dTHX;
1807 dSP;
1808
1809 ENTER;
1810 SAVETMPS;
1811
1812 PUSHMARK (SP);
1813 PUTBACK;
1814 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1815
1816 FREETMPS;
1817 LEAVE;
1818}
1819
1516static int 1820static int
1517api_ready (SV *coro_sv) 1821api_ready (pTHX_ SV *coro_sv)
1518{ 1822{
1519 dTHX;
1520 struct coro *coro;
1521 SV *sv_hook;
1522 void (*xs_hook)(void);
1523
1524 if (SvROK (coro_sv))
1525 coro_sv = SvRV (coro_sv);
1526
1527 coro = SvSTATE (coro_sv); 1823 struct coro *coro = SvSTATE (coro_sv);
1528 1824
1529 if (coro->flags & CF_READY) 1825 if (coro->flags & CF_READY)
1530 return 0; 1826 return 0;
1531 1827
1532 coro->flags |= CF_READY; 1828 coro->flags |= CF_READY;
1533 1829
1534 LOCK; 1830 coro_enq (aTHX_ coro);
1535 1831
1536 sv_hook = coro_nready ? 0 : coro_readyhook; 1832 if (!coro_nready++)
1537 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1833 if (coroapi.readyhook)
1538 1834 coroapi.readyhook ();
1539 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1540 ++coro_nready;
1541
1542 UNLOCK;
1543
1544 if (sv_hook)
1545 {
1546 dSP;
1547
1548 ENTER;
1549 SAVETMPS;
1550
1551 PUSHMARK (SP);
1552 PUTBACK;
1553 call_sv (sv_hook, G_DISCARD);
1554 SPAGAIN;
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1562 1835
1563 return 1; 1836 return 1;
1564} 1837}
1565 1838
1566static int 1839static int
1567api_is_ready (SV *coro_sv) 1840api_is_ready (pTHX_ SV *coro_sv)
1568{ 1841{
1569 dTHX;
1570
1571 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1842 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1572} 1843}
1573 1844
1845/* expects to own a reference to next->hv */
1574INLINE void 1846INLINE void
1575prepare_schedule (pTHX_ struct transfer_args *ta) 1847prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1576{ 1848{
1577 SV *prev_sv, *next_sv;
1578
1579 for (;;)
1580 {
1581 LOCK;
1582 next_sv = coro_deq (aTHX);
1583
1584 /* nothing to schedule: call the idle handler */
1585 if (expect_false (!next_sv))
1586 {
1587 dSP;
1588 UNLOCK;
1589
1590 ENTER;
1591 SAVETMPS;
1592
1593 PUSHMARK (SP);
1594 PUTBACK;
1595 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1596 SPAGAIN;
1597
1598 FREETMPS;
1599 LEAVE;
1600 continue;
1601 }
1602
1603 ta->next = SvSTATE (next_sv);
1604
1605 /* cannot transfer to destroyed coros, skip and look for next */
1606 if (expect_false (ta->next->flags & CF_DESTROYED))
1607 {
1608 UNLOCK;
1609 SvREFCNT_dec (next_sv);
1610 /* coro_nready has already been taken care of by destroy */
1611 continue;
1612 }
1613
1614 --coro_nready;
1615 UNLOCK;
1616 break;
1617 }
1618
1619 /* free this only after the transfer */
1620 prev_sv = SvRV (coro_current); 1849 SV *prev_sv = SvRV (coro_current);
1850
1621 ta->prev = SvSTATE (prev_sv); 1851 ta->prev = SvSTATE_hv (prev_sv);
1852 ta->next = next;
1853
1622 TRANSFER_CHECK (*ta); 1854 TRANSFER_CHECK (*ta);
1623 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1855
1624 ta->next->flags &= ~CF_READY;
1625 SvRV_set (coro_current, next_sv); 1856 SvRV_set (coro_current, (SV *)next->hv);
1626 1857
1627 LOCK;
1628 free_coro_mortal (aTHX); 1858 free_coro_mortal (aTHX);
1629 coro_mortal = prev_sv; 1859 coro_mortal = prev_sv;
1630 UNLOCK; 1860}
1861
1862static void
1863prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1864{
1865 for (;;)
1866 {
1867 struct coro *next = coro_deq (aTHX);
1868
1869 if (expect_true (next))
1870 {
1871 /* cannot transfer to destroyed coros, skip and look for next */
1872 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1873 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1874 else
1875 {
1876 next->flags &= ~CF_READY;
1877 --coro_nready;
1878
1879 prepare_schedule_to (aTHX_ ta, next);
1880 break;
1881 }
1882 }
1883 else
1884 {
1885 /* nothing to schedule: call the idle handler */
1886 if (SvROK (sv_idle)
1887 && SvOBJECT (SvRV (sv_idle)))
1888 {
1889 if (SvRV (sv_idle) == SvRV (coro_current))
1890 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1891
1892 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1893 api_ready (aTHX_ SvRV (sv_idle));
1894 --coro_nready;
1895 }
1896 else
1897 {
1898 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1899 dSP;
1900
1901 ENTER;
1902 SAVETMPS;
1903
1904 PUSHMARK (SP);
1905 PUTBACK;
1906 call_sv (sv_idle, G_VOID | G_DISCARD);
1907
1908 FREETMPS;
1909 LEAVE;
1910 }
1911 }
1912 }
1631} 1913}
1632 1914
1633INLINE void 1915INLINE void
1634prepare_cede (pTHX_ struct transfer_args *ta) 1916prepare_cede (pTHX_ struct coro_transfer_args *ta)
1635{ 1917{
1636 api_ready (coro_current); 1918 api_ready (aTHX_ coro_current);
1637 prepare_schedule (aTHX_ ta); 1919 prepare_schedule (aTHX_ ta);
1638} 1920}
1639 1921
1922INLINE void
1923prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1924{
1925 SV *prev = SvRV (coro_current);
1926
1927 if (coro_nready)
1928 {
1929 prepare_schedule (aTHX_ ta);
1930 api_ready (aTHX_ prev);
1931 }
1932 else
1933 prepare_nop (aTHX_ ta);
1934}
1935
1936static void
1937api_schedule (pTHX)
1938{
1939 struct coro_transfer_args ta;
1940
1941 prepare_schedule (aTHX_ &ta);
1942 TRANSFER (ta, 1);
1943}
1944
1945static void
1946api_schedule_to (pTHX_ SV *coro_sv)
1947{
1948 struct coro_transfer_args ta;
1949 struct coro *next = SvSTATE (coro_sv);
1950
1951 SvREFCNT_inc_NN (coro_sv);
1952 prepare_schedule_to (aTHX_ &ta, next);
1953}
1954
1640static int 1955static int
1641prepare_cede_notself (pTHX_ struct transfer_args *ta) 1956api_cede (pTHX)
1642{ 1957{
1643 if (coro_nready) 1958 struct coro_transfer_args ta;
1644 { 1959
1645 SV *prev = SvRV (coro_current);
1646 prepare_schedule (aTHX_ ta); 1960 prepare_cede (aTHX_ &ta);
1647 api_ready (prev); 1961
1962 if (expect_true (ta.prev != ta.next))
1963 {
1964 TRANSFER (ta, 1);
1648 return 1; 1965 return 1;
1649 } 1966 }
1650 else 1967 else
1651 return 0; 1968 return 0;
1652} 1969}
1653 1970
1654static void
1655api_schedule (void)
1656{
1657 dTHX;
1658 struct transfer_args ta;
1659
1660 prepare_schedule (aTHX_ &ta);
1661 TRANSFER (ta, 1);
1662}
1663
1664static int 1971static int
1665api_cede (void) 1972api_cede_notself (pTHX)
1666{ 1973{
1667 dTHX; 1974 if (coro_nready)
1975 {
1668 struct transfer_args ta; 1976 struct coro_transfer_args ta;
1669 1977
1670 prepare_cede (aTHX_ &ta); 1978 prepare_cede_notself (aTHX_ &ta);
1671
1672 if (expect_true (ta.prev != ta.next))
1673 {
1674 TRANSFER (ta, 1); 1979 TRANSFER (ta, 1);
1675 return 1; 1980 return 1;
1676 } 1981 }
1677 else 1982 else
1678 return 0; 1983 return 0;
1679} 1984}
1680 1985
1681static int 1986static void
1682api_cede_notself (void)
1683{
1684 dTHX;
1685 struct transfer_args ta;
1686
1687 if (prepare_cede_notself (aTHX_ &ta))
1688 {
1689 TRANSFER (ta, 1);
1690 return 1;
1691 }
1692 else
1693 return 0;
1694}
1695
1696static void
1697api_trace (SV *coro_sv, int flags) 1987api_trace (pTHX_ SV *coro_sv, int flags)
1698{ 1988{
1699 dTHX;
1700 struct coro *coro = SvSTATE (coro_sv); 1989 struct coro *coro = SvSTATE (coro_sv);
1990
1991 if (coro->flags & CF_RUNNING)
1992 croak ("cannot enable tracing on a running coroutine, caught");
1701 1993
1702 if (flags & CC_TRACE) 1994 if (flags & CC_TRACE)
1703 { 1995 {
1704 if (!coro->cctx) 1996 if (!coro->cctx)
1705 coro->cctx = cctx_new_run (); 1997 coro->cctx = cctx_new_run ();
1706 else if (!(coro->cctx->flags & CC_TRACE)) 1998 else if (!(coro->cctx->flags & CC_TRACE))
1707 croak ("cannot enable tracing on coroutine with custom stack"); 1999 croak ("cannot enable tracing on coroutine with custom stack, caught");
1708 2000
1709 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2001 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1710 } 2002 }
1711 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2003 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1712 { 2004 {
… …
1717 else 2009 else
1718 coro->slot->runops = RUNOPS_DEFAULT; 2010 coro->slot->runops = RUNOPS_DEFAULT;
1719 } 2011 }
1720} 2012}
1721 2013
1722#if 0 2014static void
2015coro_call_on_destroy (pTHX_ struct coro *coro)
2016{
2017 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2018
2019 if (on_destroyp)
2020 {
2021 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2022 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2023 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2024
2025 while (AvFILLp (on_destroy) >= 0)
2026 {
2027 dSP; /* don't disturb outer sp */
2028 SV *cb = av_pop (on_destroy);
2029
2030 PUSHMARK (SP);
2031
2032 if (statusp)
2033 {
2034 int i;
2035 EXTEND (SP, AvFILLp (status) + 1);
2036
2037 for (i = 0; i <= AvFILLp (status); ++i)
2038 PUSHs (AvARRAY (status)[i]);
2039 }
2040
2041 PUTBACK;
2042 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2043 }
2044 }
2045}
2046
2047static void
2048coro_set_status (pTHX_ HV *coro_hv, SV **arg, int items)
2049{
2050 AV *av = newAV ();
2051
2052 /* items are actually not so common, so optimise for this case */
2053 if (items)
2054 {
2055 int i;
2056
2057 av_extend (av, items - 1);
2058
2059 for (i = 0; i < items; ++i)
2060 av_push (av, SvREFCNT_inc_NN (arg [i]));
2061 }
2062
2063 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2064}
2065
2066static void
2067slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2068{
2069 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2070 api_ready (aTHX_ sv_manager);
2071
2072 frame->prepare = prepare_schedule;
2073 frame->check = slf_check_repeat;
2074
2075 /* as a minor optimisation, we could unwind all stacks here */
2076 /* but that puts extra pressure on pp_slf, and is not worth much */
2077 /*coro_unwind_stacks (aTHX);*/
2078}
2079
2080static void
2081slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 HV *coro_hv = (HV *)SvRV (coro_current);
2084
2085 coro_set_status (aTHX_ coro_hv, arg, items);
2086 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2087}
2088
2089static void
2090slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2091{
2092 HV *coro_hv;
2093 struct coro *coro;
2094
2095 if (items <= 0)
2096 croak ("Coro::cancel called without coro object,");
2097
2098 coro = SvSTATE (arg [0]);
2099 coro_hv = coro->hv;
2100
2101 coro_set_status (aTHX_ coro_hv, arg + 1, items - 1);
2102
2103 if (expect_false (coro->flags & CF_NOCANCEL))
2104 {
2105 /* coro currently busy cancelling something, so just notify it */
2106 coro->slf_frame.data = (void *)coro;
2107
2108 frame->prepare = prepare_nop;
2109 frame->check = slf_check_nop;
2110 }
2111 else if (coro_hv == (HV *)SvRV (coro_current))
2112 {
2113 /* cancelling the current coro is allowed, and equals terminate */
2114 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2115 }
2116 else
2117 {
2118 struct coro *self = SvSTATE_current;
2119
2120 /* otherwise we cancel directly, purely for speed reasons
2121 * unfortunately, this requires some magic trickery, as
2122 * somebody else could cancel us, so we have to fight the cancellation.
2123 * this is ugly, and hopefully fully worth the extra speed.
2124 * besides, I can't get the slow-but-safe version working...
2125 */
2126 slf_frame.data = 0;
2127 self->flags |= CF_NOCANCEL;
2128
2129 coro_state_destroy (aTHX_ coro);
2130 coro_call_on_destroy (aTHX_ coro);
2131
2132 self->flags &= ~CF_NOCANCEL;
2133
2134 if (slf_frame.data)
2135 {
2136 /* while we were busy we have been cancelled, so terminate */
2137 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2138 }
2139 else
2140 {
2141 frame->prepare = prepare_nop;
2142 frame->check = slf_check_nop;
2143 }
2144 }
2145}
2146
1723static int 2147static int
1724coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2148slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
1725{ 2149{
1726 AV *padlist; 2150 frame->prepare = 0;
1727 AV *av = (AV *)mg->mg_obj; 2151 coro_unwind_stacks (aTHX);
1728 2152
1729 abort (); 2153 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2154
2155 return 1;
2156}
2157
2158static int
2159safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2160{
2161 if (coro->cctx)
2162 croak ("coro inside C callback, unable to cancel at this time, caught");
2163
2164 if (coro->flags & CF_NEW)
2165 {
2166 coro_set_status (aTHX_ coro->hv, arg, items);
2167 coro_state_destroy (aTHX_ coro);
2168 coro_call_on_destroy (aTHX_ coro);
2169 }
2170 else
2171 {
2172 if (!coro->slf_frame.prepare)
2173 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2174
2175 slf_destroy (aTHX_ coro);
2176
2177 coro_set_status (aTHX_ coro->hv, arg, items);
2178 coro->slf_frame.prepare = prepare_nop;
2179 coro->slf_frame.check = slf_check_safe_cancel;
2180
2181 api_ready (aTHX_ coro->hv);
2182 }
2183
2184 return 1;
2185}
2186
2187/*****************************************************************************/
2188/* async pool handler */
2189
2190static int
2191slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2192{
2193 HV *hv = (HV *)SvRV (coro_current);
2194 struct coro *coro = (struct coro *)frame->data;
2195
2196 if (!coro->invoke_cb)
2197 return 1; /* loop till we have invoke */
2198 else
2199 {
2200 hv_store (hv, "desc", sizeof ("desc") - 1,
2201 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2202
2203 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2204
2205 {
2206 dSP;
2207 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2208 PUTBACK;
2209 }
2210
2211 SvREFCNT_dec (GvAV (PL_defgv));
2212 GvAV (PL_defgv) = coro->invoke_av;
2213 coro->invoke_av = 0;
2214
2215 return 0;
2216 }
2217}
2218
2219static void
2220slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2221{
2222 HV *hv = (HV *)SvRV (coro_current);
2223 struct coro *coro = SvSTATE_hv ((SV *)hv);
2224
2225 if (expect_true (coro->saved_deffh))
2226 {
2227 /* subsequent iteration */
2228 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2229 coro->saved_deffh = 0;
2230
2231 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2232 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2233 {
2234 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2235 return;
2236 }
2237 else
2238 {
2239 av_clear (GvAV (PL_defgv));
2240 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2241
2242 coro->prio = 0;
2243
2244 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2245 api_trace (aTHX_ coro_current, 0);
2246
2247 frame->prepare = prepare_schedule;
2248 av_push (av_async_pool, SvREFCNT_inc (hv));
2249 }
2250 }
2251 else
2252 {
2253 /* first iteration, simply fall through */
2254 frame->prepare = prepare_nop;
2255 }
2256
2257 frame->check = slf_check_pool_handler;
2258 frame->data = (void *)coro;
2259}
2260
2261/*****************************************************************************/
2262/* rouse callback */
2263
2264#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2265
2266static void
2267coro_rouse_callback (pTHX_ CV *cv)
2268{
2269 dXSARGS;
2270 SV *data = (SV *)S_GENSUB_ARG;
2271
2272 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2273 {
2274 /* first call, set args */
2275 SV *coro = SvRV (data);
2276 AV *av = newAV ();
2277
2278 SvRV_set (data, (SV *)av);
2279
2280 /* better take a full copy of the arguments */
2281 while (items--)
2282 av_store (av, items, newSVsv (ST (items)));
2283
2284 api_ready (aTHX_ coro);
2285 SvREFCNT_dec (coro);
2286 }
2287
2288 XSRETURN_EMPTY;
2289}
2290
2291static int
2292slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2293{
2294 SV *data = (SV *)frame->data;
2295
2296 if (CORO_THROW)
2297 return 0;
2298
2299 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2300 return 1;
2301
2302 /* now push all results on the stack */
2303 {
2304 dSP;
2305 AV *av = (AV *)SvRV (data);
2306 int i;
2307
2308 EXTEND (SP, AvFILLp (av) + 1);
2309 for (i = 0; i <= AvFILLp (av); ++i)
2310 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2311
2312 /* we have stolen the elements, so set length to zero and free */
2313 AvFILLp (av) = -1;
2314 av_undef (av);
2315
2316 PUTBACK;
2317 }
1730 2318
1731 return 0; 2319 return 0;
1732} 2320}
1733 2321
1734static MGVTBL coro_gensub_vtbl = { 2322static void
1735 0, 0, 0, 0, 2323slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1736 coro_gensub_free 2324{
1737}; 2325 SV *cb;
1738#endif 2326
2327 if (items)
2328 cb = arg [0];
2329 else
2330 {
2331 struct coro *coro = SvSTATE_current;
2332
2333 if (!coro->rouse_cb)
2334 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2335
2336 cb = sv_2mortal (coro->rouse_cb);
2337 coro->rouse_cb = 0;
2338 }
2339
2340 if (!SvROK (cb)
2341 || SvTYPE (SvRV (cb)) != SVt_PVCV
2342 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2343 croak ("Coro::rouse_wait called with illegal callback argument,");
2344
2345 {
2346 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2347 SV *data = (SV *)S_GENSUB_ARG;
2348
2349 frame->data = (void *)data;
2350 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2351 frame->check = slf_check_rouse_wait;
2352 }
2353}
2354
2355static SV *
2356coro_new_rouse_cb (pTHX)
2357{
2358 HV *hv = (HV *)SvRV (coro_current);
2359 struct coro *coro = SvSTATE_hv (hv);
2360 SV *data = newRV_inc ((SV *)hv);
2361 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2362
2363 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2364 SvREFCNT_dec (data); /* magicext increases the refcount */
2365
2366 SvREFCNT_dec (coro->rouse_cb);
2367 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2368
2369 return cb;
2370}
2371
2372/*****************************************************************************/
2373/* schedule-like-function opcode (SLF) */
2374
2375static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2376static const CV *slf_cv;
2377static SV **slf_argv;
2378static int slf_argc, slf_arga; /* count, allocated */
2379static I32 slf_ax; /* top of stack, for restore */
2380
2381/* this restores the stack in the case we patched the entersub, to */
2382/* recreate the stack frame as perl will on following calls */
2383/* since entersub cleared the stack */
2384static OP *
2385pp_restore (pTHX)
2386{
2387 int i;
2388 SV **SP = PL_stack_base + slf_ax;
2389
2390 PUSHMARK (SP);
2391
2392 EXTEND (SP, slf_argc + 1);
2393
2394 for (i = 0; i < slf_argc; ++i)
2395 PUSHs (sv_2mortal (slf_argv [i]));
2396
2397 PUSHs ((SV *)CvGV (slf_cv));
2398
2399 RETURNOP (slf_restore.op_first);
2400}
2401
2402static void
2403slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2404{
2405 SV **arg = (SV **)slf_frame.data;
2406
2407 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2408}
2409
2410static void
2411slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2412{
2413 if (items != 2)
2414 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2415
2416 frame->prepare = slf_prepare_transfer;
2417 frame->check = slf_check_nop;
2418 frame->data = (void *)arg; /* let's hope it will stay valid */
2419}
2420
2421static void
2422slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 frame->prepare = prepare_schedule;
2425 frame->check = slf_check_nop;
2426}
2427
2428static void
2429slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2430{
2431 struct coro *next = (struct coro *)slf_frame.data;
2432
2433 SvREFCNT_inc_NN (next->hv);
2434 prepare_schedule_to (aTHX_ ta, next);
2435}
2436
2437static void
2438slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2439{
2440 if (!items)
2441 croak ("Coro::schedule_to expects a coroutine argument, caught");
2442
2443 frame->data = (void *)SvSTATE (arg [0]);
2444 frame->prepare = slf_prepare_schedule_to;
2445 frame->check = slf_check_nop;
2446}
2447
2448static void
2449slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2450{
2451 api_ready (aTHX_ SvRV (coro_current));
2452
2453 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2454}
2455
2456static void
2457slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2458{
2459 frame->prepare = prepare_cede;
2460 frame->check = slf_check_nop;
2461}
2462
2463static void
2464slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2465{
2466 frame->prepare = prepare_cede_notself;
2467 frame->check = slf_check_nop;
2468}
2469
2470/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2471static void
2472slf_destroy (pTHX_ struct coro *coro)
2473{
2474 /* this callback is reserved for slf functions needing to do cleanup */
2475 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2476 coro->slf_frame.destroy (aTHX_ coro);
2477
2478 /*
2479 * The on_destroy above most likely is from an SLF call.
2480 * Since by definition the SLF call will not finish when we destroy
2481 * the coro, we will have to force-finish it here, otherwise
2482 * cleanup functions cannot call SLF functions.
2483 */
2484 coro->slf_frame.prepare = 0;
2485}
2486
2487/*
2488 * these not obviously related functions are all rolled into one
2489 * function to increase chances that they all will call transfer with the same
2490 * stack offset
2491 * SLF stands for "schedule-like-function".
2492 */
2493static OP *
2494pp_slf (pTHX)
2495{
2496 I32 checkmark; /* mark SP to see how many elements check has pushed */
2497
2498 /* set up the slf frame, unless it has already been set-up */
2499 /* the latter happens when a new coro has been started */
2500 /* or when a new cctx was attached to an existing coroutine */
2501 if (expect_true (!slf_frame.prepare))
2502 {
2503 /* first iteration */
2504 dSP;
2505 SV **arg = PL_stack_base + TOPMARK + 1;
2506 int items = SP - arg; /* args without function object */
2507 SV *gv = *sp;
2508
2509 /* do a quick consistency check on the "function" object, and if it isn't */
2510 /* for us, divert to the real entersub */
2511 if (SvTYPE (gv) != SVt_PVGV
2512 || !GvCV (gv)
2513 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2514 return PL_ppaddr[OP_ENTERSUB](aTHX);
2515
2516 if (!(PL_op->op_flags & OPf_STACKED))
2517 {
2518 /* ampersand-form of call, use @_ instead of stack */
2519 AV *av = GvAV (PL_defgv);
2520 arg = AvARRAY (av);
2521 items = AvFILLp (av) + 1;
2522 }
2523
2524 /* now call the init function, which needs to set up slf_frame */
2525 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2526 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2527
2528 /* pop args */
2529 SP = PL_stack_base + POPMARK;
2530
2531 PUTBACK;
2532 }
2533
2534 /* now that we have a slf_frame, interpret it! */
2535 /* we use a callback system not to make the code needlessly */
2536 /* complicated, but so we can run multiple perl coros from one cctx */
2537
2538 do
2539 {
2540 struct coro_transfer_args ta;
2541
2542 slf_frame.prepare (aTHX_ &ta);
2543 TRANSFER (ta, 0);
2544
2545 checkmark = PL_stack_sp - PL_stack_base;
2546 }
2547 while (slf_frame.check (aTHX_ &slf_frame));
2548
2549 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2550
2551 /* exception handling */
2552 if (expect_false (CORO_THROW))
2553 {
2554 SV *exception = sv_2mortal (CORO_THROW);
2555
2556 CORO_THROW = 0;
2557 sv_setsv (ERRSV, exception);
2558 croak (0);
2559 }
2560
2561 /* return value handling - mostly like entersub */
2562 /* make sure we put something on the stack in scalar context */
2563 if (GIMME_V == G_SCALAR)
2564 {
2565 dSP;
2566 SV **bot = PL_stack_base + checkmark;
2567
2568 if (sp == bot) /* too few, push undef */
2569 bot [1] = &PL_sv_undef;
2570 else if (sp != bot + 1) /* too many, take last one */
2571 bot [1] = *sp;
2572
2573 SP = bot + 1;
2574
2575 PUTBACK;
2576 }
2577
2578 return NORMAL;
2579}
2580
2581static void
2582api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2583{
2584 int i;
2585 SV **arg = PL_stack_base + ax;
2586 int items = PL_stack_sp - arg + 1;
2587
2588 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2589
2590 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2591 && PL_op->op_ppaddr != pp_slf)
2592 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2593
2594 CvFLAGS (cv) |= CVf_SLF;
2595 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2596 slf_cv = cv;
2597
2598 /* we patch the op, and then re-run the whole call */
2599 /* we have to put the same argument on the stack for this to work */
2600 /* and this will be done by pp_restore */
2601 slf_restore.op_next = (OP *)&slf_restore;
2602 slf_restore.op_type = OP_CUSTOM;
2603 slf_restore.op_ppaddr = pp_restore;
2604 slf_restore.op_first = PL_op;
2605
2606 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2607
2608 if (PL_op->op_flags & OPf_STACKED)
2609 {
2610 if (items > slf_arga)
2611 {
2612 slf_arga = items;
2613 Safefree (slf_argv);
2614 New (0, slf_argv, slf_arga, SV *);
2615 }
2616
2617 slf_argc = items;
2618
2619 for (i = 0; i < items; ++i)
2620 slf_argv [i] = SvREFCNT_inc (arg [i]);
2621 }
2622 else
2623 slf_argc = 0;
2624
2625 PL_op->op_ppaddr = pp_slf;
2626 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2627
2628 PL_op = (OP *)&slf_restore;
2629}
2630
2631/*****************************************************************************/
2632/* dynamic wind */
2633
2634static void
2635on_enterleave_call (pTHX_ SV *cb)
2636{
2637 dSP;
2638
2639 PUSHSTACK;
2640
2641 PUSHMARK (SP);
2642 PUTBACK;
2643 call_sv (cb, G_VOID | G_DISCARD);
2644 SPAGAIN;
2645
2646 POPSTACK;
2647}
2648
2649static SV *
2650coro_avp_pop_and_free (pTHX_ AV **avp)
2651{
2652 AV *av = *avp;
2653 SV *res = av_pop (av);
2654
2655 if (AvFILLp (av) < 0)
2656 {
2657 *avp = 0;
2658 SvREFCNT_dec (av);
2659 }
2660
2661 return res;
2662}
2663
2664static void
2665coro_pop_on_enter (pTHX_ void *coro)
2666{
2667 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2668 SvREFCNT_dec (cb);
2669}
2670
2671static void
2672coro_pop_on_leave (pTHX_ void *coro)
2673{
2674 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2675 on_enterleave_call (aTHX_ sv_2mortal (cb));
2676}
1739 2677
1740/*****************************************************************************/ 2678/*****************************************************************************/
1741/* PerlIO::cede */ 2679/* PerlIO::cede */
1742 2680
1743typedef struct 2681typedef struct
… …
1771 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2709 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1772 double now = nvtime (); 2710 double now = nvtime ();
1773 2711
1774 if (now >= self->next) 2712 if (now >= self->next)
1775 { 2713 {
1776 api_cede (); 2714 api_cede (aTHX);
1777 self->next = now + self->every; 2715 self->next = now + self->every;
1778 } 2716 }
1779 2717
1780 return PerlIOBuf_flush (aTHX_ f); 2718 return PerlIOBuf_flush (aTHX_ f);
1781} 2719}
… …
1810 PerlIOBuf_get_ptr, 2748 PerlIOBuf_get_ptr,
1811 PerlIOBuf_get_cnt, 2749 PerlIOBuf_get_cnt,
1812 PerlIOBuf_set_ptrcnt, 2750 PerlIOBuf_set_ptrcnt,
1813}; 2751};
1814 2752
2753/*****************************************************************************/
2754/* Coro::Semaphore & Coro::Signal */
2755
2756static SV *
2757coro_waitarray_new (pTHX_ int count)
2758{
2759 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2760 AV *av = newAV ();
2761 SV **ary;
2762
2763 /* unfortunately, building manually saves memory */
2764 Newx (ary, 2, SV *);
2765 AvALLOC (av) = ary;
2766#if PERL_VERSION_ATLEAST (5,10,0)
2767 AvARRAY (av) = ary;
2768#else
2769 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2770 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2771 SvPVX ((SV *)av) = (char *)ary;
2772#endif
2773 AvMAX (av) = 1;
2774 AvFILLp (av) = 0;
2775 ary [0] = newSViv (count);
2776
2777 return newRV_noinc ((SV *)av);
2778}
2779
2780/* semaphore */
2781
2782static void
2783coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2784{
2785 SV *count_sv = AvARRAY (av)[0];
2786 IV count = SvIVX (count_sv);
2787
2788 count += adjust;
2789 SvIVX (count_sv) = count;
2790
2791 /* now wake up as many waiters as are expected to lock */
2792 while (count > 0 && AvFILLp (av) > 0)
2793 {
2794 SV *cb;
2795
2796 /* swap first two elements so we can shift a waiter */
2797 AvARRAY (av)[0] = AvARRAY (av)[1];
2798 AvARRAY (av)[1] = count_sv;
2799 cb = av_shift (av);
2800
2801 if (SvOBJECT (cb))
2802 {
2803 api_ready (aTHX_ cb);
2804 --count;
2805 }
2806 else if (SvTYPE (cb) == SVt_PVCV)
2807 {
2808 dSP;
2809 PUSHMARK (SP);
2810 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2811 PUTBACK;
2812 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2813 }
2814
2815 SvREFCNT_dec (cb);
2816 }
2817}
2818
2819static void
2820coro_semaphore_destroy (pTHX_ struct coro *coro)
2821{
2822 /* call $sem->adjust (0) to possibly wake up some other waiters */
2823 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2824}
2825
2826static int
2827slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2828{
2829 AV *av = (AV *)frame->data;
2830 SV *count_sv = AvARRAY (av)[0];
2831
2832 /* if we are about to throw, don't actually acquire the lock, just throw */
2833 if (CORO_THROW)
2834 return 0;
2835 else if (SvIVX (count_sv) > 0)
2836 {
2837 frame->destroy = 0;
2838
2839 if (acquire)
2840 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2841 else
2842 coro_semaphore_adjust (aTHX_ av, 0);
2843
2844 return 0;
2845 }
2846 else
2847 {
2848 int i;
2849 /* if we were woken up but can't down, we look through the whole */
2850 /* waiters list and only add us if we aren't in there already */
2851 /* this avoids some degenerate memory usage cases */
2852
2853 for (i = 1; i <= AvFILLp (av); ++i)
2854 if (AvARRAY (av)[i] == SvRV (coro_current))
2855 return 1;
2856
2857 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2858 return 1;
2859 }
2860}
2861
2862static int
2863slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2864{
2865 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2866}
2867
2868static int
2869slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2870{
2871 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2872}
2873
2874static void
2875slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2876{
2877 AV *av = (AV *)SvRV (arg [0]);
2878
2879 if (SvIVX (AvARRAY (av)[0]) > 0)
2880 {
2881 frame->data = (void *)av;
2882 frame->prepare = prepare_nop;
2883 }
2884 else
2885 {
2886 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2887
2888 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2889 frame->prepare = prepare_schedule;
2890 /* to avoid race conditions when a woken-up coro gets terminated */
2891 /* we arrange for a temporary on_destroy that calls adjust (0) */
2892 frame->destroy = coro_semaphore_destroy;
2893 }
2894}
2895
2896static void
2897slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2898{
2899 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2900 frame->check = slf_check_semaphore_down;
2901}
2902
2903static void
2904slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2905{
2906 if (items >= 2)
2907 {
2908 /* callback form */
2909 AV *av = (AV *)SvRV (arg [0]);
2910 SV *cb_cv = s_get_cv_croak (arg [1]);
2911
2912 av_push (av, SvREFCNT_inc_NN (cb_cv));
2913
2914 if (SvIVX (AvARRAY (av)[0]) > 0)
2915 coro_semaphore_adjust (aTHX_ av, 0);
2916
2917 frame->prepare = prepare_nop;
2918 frame->check = slf_check_nop;
2919 }
2920 else
2921 {
2922 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2923 frame->check = slf_check_semaphore_wait;
2924 }
2925}
2926
2927/* signal */
2928
2929static void
2930coro_signal_wake (pTHX_ AV *av, int count)
2931{
2932 SvIVX (AvARRAY (av)[0]) = 0;
2933
2934 /* now signal count waiters */
2935 while (count > 0 && AvFILLp (av) > 0)
2936 {
2937 SV *cb;
2938
2939 /* swap first two elements so we can shift a waiter */
2940 cb = AvARRAY (av)[0];
2941 AvARRAY (av)[0] = AvARRAY (av)[1];
2942 AvARRAY (av)[1] = cb;
2943
2944 cb = av_shift (av);
2945
2946 if (SvTYPE (cb) == SVt_PVCV)
2947 {
2948 dSP;
2949 PUSHMARK (SP);
2950 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2951 PUTBACK;
2952 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2953 }
2954 else
2955 {
2956 api_ready (aTHX_ cb);
2957 sv_setiv (cb, 0); /* signal waiter */
2958 }
2959
2960 SvREFCNT_dec (cb);
2961
2962 --count;
2963 }
2964}
2965
2966static int
2967slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2968{
2969 /* if we are about to throw, also stop waiting */
2970 return SvROK ((SV *)frame->data) && !CORO_THROW;
2971}
2972
2973static void
2974slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2975{
2976 AV *av = (AV *)SvRV (arg [0]);
2977
2978 if (items >= 2)
2979 {
2980 SV *cb_cv = s_get_cv_croak (arg [1]);
2981 av_push (av, SvREFCNT_inc_NN (cb_cv));
2982
2983 if (SvIVX (AvARRAY (av)[0]))
2984 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2985
2986 frame->prepare = prepare_nop;
2987 frame->check = slf_check_nop;
2988 }
2989 else if (SvIVX (AvARRAY (av)[0]))
2990 {
2991 SvIVX (AvARRAY (av)[0]) = 0;
2992 frame->prepare = prepare_nop;
2993 frame->check = slf_check_nop;
2994 }
2995 else
2996 {
2997 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2998
2999 av_push (av, waiter);
3000
3001 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3002 frame->prepare = prepare_schedule;
3003 frame->check = slf_check_signal_wait;
3004 }
3005}
3006
3007/*****************************************************************************/
3008/* Coro::AIO */
3009
3010#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3011
3012/* helper storage struct */
3013struct io_state
3014{
3015 int errorno;
3016 I32 laststype; /* U16 in 5.10.0 */
3017 int laststatval;
3018 Stat_t statcache;
3019};
3020
3021static void
3022coro_aio_callback (pTHX_ CV *cv)
3023{
3024 dXSARGS;
3025 AV *state = (AV *)S_GENSUB_ARG;
3026 SV *coro = av_pop (state);
3027 SV *data_sv = newSV (sizeof (struct io_state));
3028
3029 av_extend (state, items - 1);
3030
3031 sv_upgrade (data_sv, SVt_PV);
3032 SvCUR_set (data_sv, sizeof (struct io_state));
3033 SvPOK_only (data_sv);
3034
3035 {
3036 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3037
3038 data->errorno = errno;
3039 data->laststype = PL_laststype;
3040 data->laststatval = PL_laststatval;
3041 data->statcache = PL_statcache;
3042 }
3043
3044 /* now build the result vector out of all the parameters and the data_sv */
3045 {
3046 int i;
3047
3048 for (i = 0; i < items; ++i)
3049 av_push (state, SvREFCNT_inc_NN (ST (i)));
3050 }
3051
3052 av_push (state, data_sv);
3053
3054 api_ready (aTHX_ coro);
3055 SvREFCNT_dec (coro);
3056 SvREFCNT_dec ((AV *)state);
3057}
3058
3059static int
3060slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3061{
3062 AV *state = (AV *)frame->data;
3063
3064 /* if we are about to throw, return early */
3065 /* this does not cancel the aio request, but at least */
3066 /* it quickly returns */
3067 if (CORO_THROW)
3068 return 0;
3069
3070 /* one element that is an RV? repeat! */
3071 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3072 return 1;
3073
3074 /* restore status */
3075 {
3076 SV *data_sv = av_pop (state);
3077 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3078
3079 errno = data->errorno;
3080 PL_laststype = data->laststype;
3081 PL_laststatval = data->laststatval;
3082 PL_statcache = data->statcache;
3083
3084 SvREFCNT_dec (data_sv);
3085 }
3086
3087 /* push result values */
3088 {
3089 dSP;
3090 int i;
3091
3092 EXTEND (SP, AvFILLp (state) + 1);
3093 for (i = 0; i <= AvFILLp (state); ++i)
3094 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3095
3096 PUTBACK;
3097 }
3098
3099 return 0;
3100}
3101
3102static void
3103slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3104{
3105 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3106 SV *coro_hv = SvRV (coro_current);
3107 struct coro *coro = SvSTATE_hv (coro_hv);
3108
3109 /* put our coroutine id on the state arg */
3110 av_push (state, SvREFCNT_inc_NN (coro_hv));
3111
3112 /* first see whether we have a non-zero priority and set it as AIO prio */
3113 if (coro->prio)
3114 {
3115 dSP;
3116
3117 static SV *prio_cv;
3118 static SV *prio_sv;
3119
3120 if (expect_false (!prio_cv))
3121 {
3122 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3123 prio_sv = newSViv (0);
3124 }
3125
3126 PUSHMARK (SP);
3127 sv_setiv (prio_sv, coro->prio);
3128 XPUSHs (prio_sv);
3129
3130 PUTBACK;
3131 call_sv (prio_cv, G_VOID | G_DISCARD);
3132 }
3133
3134 /* now call the original request */
3135 {
3136 dSP;
3137 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3138 int i;
3139
3140 PUSHMARK (SP);
3141
3142 /* first push all args to the stack */
3143 EXTEND (SP, items + 1);
3144
3145 for (i = 0; i < items; ++i)
3146 PUSHs (arg [i]);
3147
3148 /* now push the callback closure */
3149 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3150
3151 /* now call the AIO function - we assume our request is uncancelable */
3152 PUTBACK;
3153 call_sv ((SV *)req, G_VOID | G_DISCARD);
3154 }
3155
3156 /* now that the request is going, we loop till we have a result */
3157 frame->data = (void *)state;
3158 frame->prepare = prepare_schedule;
3159 frame->check = slf_check_aio_req;
3160}
3161
3162static void
3163coro_aio_req_xs (pTHX_ CV *cv)
3164{
3165 dXSARGS;
3166
3167 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3168
3169 XSRETURN_EMPTY;
3170}
3171
3172/*****************************************************************************/
3173
3174#if CORO_CLONE
3175# include "clone.c"
3176#endif
3177
3178/*****************************************************************************/
3179
3180static SV *
3181coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3182{
3183 SV *coro_sv;
3184 struct coro *coro;
3185 MAGIC *mg;
3186 HV *hv;
3187 SV *cb;
3188 int i;
3189
3190 if (argc > 0)
3191 {
3192 cb = s_get_cv_croak (argv [0]);
3193
3194 if (!is_coro)
3195 {
3196 if (CvISXSUB (cb))
3197 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3198
3199 if (!CvROOT (cb))
3200 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3201 }
3202 }
3203
3204 Newz (0, coro, 1, struct coro);
3205 coro->args = newAV ();
3206 coro->flags = CF_NEW;
3207
3208 if (coro_first) coro_first->prev = coro;
3209 coro->next = coro_first;
3210 coro_first = coro;
3211
3212 coro->hv = hv = newHV ();
3213 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3214 mg->mg_flags |= MGf_DUP;
3215 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3216
3217 if (argc > 0)
3218 {
3219 av_extend (coro->args, argc + is_coro - 1);
3220
3221 if (is_coro)
3222 {
3223 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3224 cb = (SV *)cv_coro_run;
3225 }
3226
3227 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3228
3229 for (i = 1; i < argc; i++)
3230 av_push (coro->args, newSVsv (argv [i]));
3231 }
3232
3233 return coro_sv;
3234}
1815 3235
1816MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3236MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1817 3237
1818PROTOTYPES: DISABLE 3238PROTOTYPES: DISABLE
1819 3239
1820BOOT: 3240BOOT:
1821{ 3241{
1822#ifdef USE_ITHREADS 3242#ifdef USE_ITHREADS
1823 MUTEX_INIT (&coro_lock);
1824# if CORO_PTHREAD 3243# if CORO_PTHREAD
1825 coro_thx = PERL_GET_CONTEXT; 3244 coro_thx = PERL_GET_CONTEXT;
1826# endif 3245# endif
1827#endif 3246#endif
1828 BOOT_PAGESIZE; 3247 BOOT_PAGESIZE;
1829 3248
3249 cctx_current = cctx_new_empty ();
3250
1830 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3251 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1831 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3252 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1832 3253
1833 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3254 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1834 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3255 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
1849 main_top_env = PL_top_env; 3270 main_top_env = PL_top_env;
1850 3271
1851 while (main_top_env->je_prev) 3272 while (main_top_env->je_prev)
1852 main_top_env = main_top_env->je_prev; 3273 main_top_env = main_top_env->je_prev;
1853 3274
1854 coroapi.ver = CORO_API_VERSION;
1855 coroapi.rev = CORO_API_REVISION;
1856 coroapi.transfer = api_transfer;
1857
1858 { 3275 {
1859 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3276 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
1860 3277
1861 if (!svp) croak ("Time::HiRes is required"); 3278 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
1862 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3279 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
1863 3280
1864 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3281 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3282 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
1865 } 3283 }
1866 3284
3285 coroapi.ver = CORO_API_VERSION;
3286 coroapi.rev = CORO_API_REVISION;
3287
3288 coroapi.transfer = api_transfer;
3289
3290 coroapi.sv_state = SvSTATE_;
3291 coroapi.execute_slf = api_execute_slf;
3292 coroapi.prepare_nop = prepare_nop;
3293 coroapi.prepare_schedule = prepare_schedule;
3294 coroapi.prepare_cede = prepare_cede;
3295 coroapi.prepare_cede_notself = prepare_cede_notself;
3296
3297 time_init (aTHX);
3298
1867 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3299 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1868} 3300}
1869 3301
1870SV * 3302SV *
1871new (char *klass, ...) 3303new (SV *klass, ...)
3304 ALIAS:
3305 Coro::new = 1
1872 CODE: 3306 CODE:
1873{ 3307 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1874 struct coro *coro;
1875 MAGIC *mg;
1876 HV *hv;
1877 int i;
1878
1879 Newz (0, coro, 1, struct coro);
1880 coro->args = newAV ();
1881 coro->flags = CF_NEW;
1882
1883 if (coro_first) coro_first->prev = coro;
1884 coro->next = coro_first;
1885 coro_first = coro;
1886
1887 coro->hv = hv = newHV ();
1888 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1889 mg->mg_flags |= MGf_DUP;
1890 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1891
1892 av_extend (coro->args, items - 1);
1893 for (i = 1; i < items; i++)
1894 av_push (coro->args, newSVsv (ST (i)));
1895}
1896 OUTPUT:
1897 RETVAL
1898
1899# these not obviously related functions are all rolled into the same xs
1900# function to increase chances that they all will call transfer with the same
1901# stack offset
1902void
1903_set_stacklevel (...)
1904 ALIAS:
1905 Coro::State::transfer = 1
1906 Coro::schedule = 2
1907 Coro::cede = 3
1908 Coro::cede_notself = 4
1909 CODE:
1910{
1911 struct transfer_args ta;
1912
1913 PUTBACK;
1914 switch (ix)
1915 {
1916 case 0:
1917 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1918 break;
1919
1920 case 1:
1921 if (items != 2)
1922 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1923
1924 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1925 break;
1926
1927 case 2:
1928 prepare_schedule (aTHX_ &ta);
1929 break;
1930
1931 case 3:
1932 prepare_cede (aTHX_ &ta);
1933 break;
1934
1935 case 4:
1936 if (!prepare_cede_notself (aTHX_ &ta))
1937 XSRETURN_EMPTY;
1938
1939 break;
1940 }
1941 SPAGAIN;
1942
1943 BARRIER;
1944 PUTBACK;
1945 TRANSFER (ta, 0);
1946 SPAGAIN; /* might be the sp of a different coroutine now */
1947 /* be extra careful not to ever do anything after TRANSFER */
1948}
1949
1950bool
1951_destroy (SV *coro_sv)
1952 CODE:
1953 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1954 OUTPUT: 3308 OUTPUT:
1955 RETVAL 3309 RETVAL
3310
3311void
3312transfer (...)
3313 PROTOTYPE: $$
3314 CODE:
3315 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1956 3316
1957void 3317void
1958_exit (int code) 3318_exit (int code)
1959 PROTOTYPE: $ 3319 PROTOTYPE: $
1960 CODE: 3320 CODE:
1961 _exit (code); 3321 _exit (code);
1962 3322
3323SV *
3324clone (Coro::State coro)
3325 CODE:
3326{
3327#if CORO_CLONE
3328 struct coro *ncoro = coro_clone (aTHX_ coro);
3329 MAGIC *mg;
3330 /* TODO: too much duplication */
3331 ncoro->hv = newHV ();
3332 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3333 mg->mg_flags |= MGf_DUP;
3334 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3335#else
3336 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3337#endif
3338}
3339 OUTPUT:
3340 RETVAL
3341
1963int 3342int
1964cctx_stacksize (int new_stacksize = 0) 3343cctx_stacksize (int new_stacksize = 0)
3344 PROTOTYPE: ;$
1965 CODE: 3345 CODE:
1966 RETVAL = cctx_stacksize; 3346 RETVAL = cctx_stacksize;
1967 if (new_stacksize) 3347 if (new_stacksize)
1968 { 3348 {
1969 cctx_stacksize = new_stacksize; 3349 cctx_stacksize = new_stacksize;
… …
1972 OUTPUT: 3352 OUTPUT:
1973 RETVAL 3353 RETVAL
1974 3354
1975int 3355int
1976cctx_max_idle (int max_idle = 0) 3356cctx_max_idle (int max_idle = 0)
3357 PROTOTYPE: ;$
1977 CODE: 3358 CODE:
1978 RETVAL = cctx_max_idle; 3359 RETVAL = cctx_max_idle;
1979 if (max_idle > 1) 3360 if (max_idle > 1)
1980 cctx_max_idle = max_idle; 3361 cctx_max_idle = max_idle;
1981 OUTPUT: 3362 OUTPUT:
1982 RETVAL 3363 RETVAL
1983 3364
1984int 3365int
1985cctx_count () 3366cctx_count ()
3367 PROTOTYPE:
1986 CODE: 3368 CODE:
1987 RETVAL = cctx_count; 3369 RETVAL = cctx_count;
1988 OUTPUT: 3370 OUTPUT:
1989 RETVAL 3371 RETVAL
1990 3372
1991int 3373int
1992cctx_idle () 3374cctx_idle ()
3375 PROTOTYPE:
1993 CODE: 3376 CODE:
1994 RETVAL = cctx_idle; 3377 RETVAL = cctx_idle;
1995 OUTPUT: 3378 OUTPUT:
1996 RETVAL 3379 RETVAL
1997 3380
1998void 3381void
1999list () 3382list ()
3383 PROTOTYPE:
2000 PPCODE: 3384 PPCODE:
2001{ 3385{
2002 struct coro *coro; 3386 struct coro *coro;
2003 for (coro = coro_first; coro; coro = coro->next) 3387 for (coro = coro_first; coro; coro = coro->next)
2004 if (coro->hv) 3388 if (coro->hv)
… …
2011 eval = 1 3395 eval = 1
2012 CODE: 3396 CODE:
2013{ 3397{
2014 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3398 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2015 { 3399 {
2016 struct coro temp; 3400 struct coro *current = SvSTATE_current;
3401 struct CoroSLF slf_save;
2017 3402
2018 if (!(coro->flags & CF_RUNNING)) 3403 if (current != coro)
2019 { 3404 {
2020 PUTBACK; 3405 PUTBACK;
2021 save_perl (aTHX_ &temp); 3406 save_perl (aTHX_ current);
2022 load_perl (aTHX_ coro); 3407 load_perl (aTHX_ coro);
3408 /* the coro is most likely in an active SLF call.
3409 * while not strictly required (the code we execute is
3410 * not allowed to call any SLF functions), it's cleaner
3411 * to reinitialise the slf_frame and restore it later.
3412 * This might one day allow us to actually do SLF calls
3413 * from code executed here.
3414 */
3415 slf_save = slf_frame;
3416 slf_frame.prepare = 0;
3417 SPAGAIN;
2023 } 3418 }
2024 3419
2025 {
2026 dSP;
2027 ENTER;
2028 SAVETMPS;
2029 PUTBACK;
2030 PUSHSTACK; 3420 PUSHSTACK;
3421
2031 PUSHMARK (SP); 3422 PUSHMARK (SP);
3423 PUTBACK;
2032 3424
2033 if (ix) 3425 if (ix)
2034 eval_sv (coderef, 0); 3426 eval_sv (coderef, 0);
2035 else 3427 else
2036 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3428 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2037 3429
2038 POPSTACK; 3430 POPSTACK;
2039 SPAGAIN; 3431 SPAGAIN;
2040 FREETMPS;
2041 LEAVE;
2042 PUTBACK;
2043 }
2044 3432
2045 if (!(coro->flags & CF_RUNNING)) 3433 if (current != coro)
2046 { 3434 {
3435 PUTBACK;
3436 slf_frame = slf_save;
2047 save_perl (aTHX_ coro); 3437 save_perl (aTHX_ coro);
2048 load_perl (aTHX_ &temp); 3438 load_perl (aTHX_ current);
2049 SPAGAIN; 3439 SPAGAIN;
2050 } 3440 }
2051 } 3441 }
2052} 3442}
2053 3443
… …
2057 ALIAS: 3447 ALIAS:
2058 is_ready = CF_READY 3448 is_ready = CF_READY
2059 is_running = CF_RUNNING 3449 is_running = CF_RUNNING
2060 is_new = CF_NEW 3450 is_new = CF_NEW
2061 is_destroyed = CF_DESTROYED 3451 is_destroyed = CF_DESTROYED
3452 is_suspended = CF_SUSPENDED
2062 CODE: 3453 CODE:
2063 RETVAL = boolSV (coro->flags & ix); 3454 RETVAL = boolSV (coro->flags & ix);
2064 OUTPUT: 3455 OUTPUT:
2065 RETVAL 3456 RETVAL
2066 3457
2067void 3458void
2068throw (Coro::State self, SV *throw = &PL_sv_undef) 3459throw (Coro::State self, SV *exception = &PL_sv_undef)
2069 PROTOTYPE: $;$ 3460 PROTOTYPE: $;$
2070 CODE: 3461 CODE:
3462{
3463 struct coro *current = SvSTATE_current;
3464 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2071 SvREFCNT_dec (self->throw); 3465 SvREFCNT_dec (*exceptionp);
2072 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3466 SvGETMAGIC (exception);
3467 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3468}
2073 3469
2074void 3470void
2075api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3471api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3472 PROTOTYPE: $;$
3473 C_ARGS: aTHX_ coro, flags
2076 3474
2077SV * 3475SV *
2078has_cctx (Coro::State coro) 3476has_cctx (Coro::State coro)
2079 PROTOTYPE: $ 3477 PROTOTYPE: $
2080 CODE: 3478 CODE:
2081 RETVAL = boolSV (!!coro->cctx); 3479 /* maybe manage the running flag differently */
3480 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2082 OUTPUT: 3481 OUTPUT:
2083 RETVAL 3482 RETVAL
2084 3483
2085int 3484int
2086is_traced (Coro::State coro) 3485is_traced (Coro::State coro)
… …
2104 OUTPUT: 3503 OUTPUT:
2105 RETVAL 3504 RETVAL
2106 3505
2107void 3506void
2108force_cctx () 3507force_cctx ()
3508 PROTOTYPE:
2109 CODE: 3509 CODE:
2110 struct coro *coro = SvSTATE (coro_current);
2111 coro->cctx->idle_sp = 0; 3510 cctx_current->idle_sp = 0;
2112 3511
2113void 3512void
2114swap_defsv (Coro::State self) 3513swap_defsv (Coro::State self)
2115 PROTOTYPE: $ 3514 PROTOTYPE: $
2116 ALIAS: 3515 ALIAS:
2117 swap_defav = 1 3516 swap_defav = 1
2118 CODE: 3517 CODE:
2119 if (!self->slot) 3518 if (!self->slot)
2120 croak ("cannot swap state with coroutine that has no saved state"); 3519 croak ("cannot swap state with coroutine that has no saved state,");
2121 else 3520 else
2122 { 3521 {
2123 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3522 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2124 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3523 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2125 3524
2126 SV *tmp = *src; *src = *dst; *dst = tmp; 3525 SV *tmp = *src; *src = *dst; *dst = tmp;
2127 } 3526 }
2128 3527
3528void
3529cancel (Coro::State self)
3530 CODE:
3531 coro_state_destroy (aTHX_ self);
3532
3533SV *
3534enable_times (int enabled = enable_times)
3535 CODE:
3536{
3537 RETVAL = boolSV (enable_times);
3538
3539 if (enabled != enable_times)
3540 {
3541 enable_times = enabled;
3542
3543 coro_times_update ();
3544 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3545 }
3546}
3547 OUTPUT:
3548 RETVAL
3549
3550void
3551times (Coro::State self)
3552 PPCODE:
3553{
3554 struct coro *current = SvSTATE (coro_current);
3555
3556 if (expect_false (current == self))
3557 {
3558 coro_times_update ();
3559 coro_times_add (SvSTATE (coro_current));
3560 }
3561
3562 EXTEND (SP, 2);
3563 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3564 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3565
3566 if (expect_false (current == self))
3567 coro_times_sub (SvSTATE (coro_current));
3568}
3569
3570void
3571swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3572 CODE:
3573{
3574 struct coro *current = SvSTATE_current;
3575
3576 if (current == coro)
3577 SWAP_SVS (current);
3578
3579 if (!coro->swap_sv)
3580 coro->swap_sv = newAV ();
3581
3582 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3583 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3584
3585 if (current == coro)
3586 SWAP_SVS (current);
3587}
3588
3589
2129MODULE = Coro::State PACKAGE = Coro 3590MODULE = Coro::State PACKAGE = Coro
2130 3591
2131BOOT: 3592BOOT:
2132{ 3593{
2133 int i;
2134
2135 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2136 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3594 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2137 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3595 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2138 3596 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
2139 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3597 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2140 SvREADONLY_on (coro_current); 3598 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3599 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3600 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3601 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2141 3602
3603 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3604 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3605 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3606 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3607
2142 coro_stash = gv_stashpv ("Coro", TRUE); 3608 coro_stash = gv_stashpv ("Coro", TRUE);
2143 3609
2144 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3610 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2145 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3611 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2146 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3612 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2147 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3613 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2148 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3614 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2149 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3615 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2150
2151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2152 coro_ready[i] = newAV ();
2153 3616
2154 { 3617 {
2155 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3618 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2156 3619
2157 coroapi.schedule = api_schedule; 3620 coroapi.schedule = api_schedule;
3621 coroapi.schedule_to = api_schedule_to;
2158 coroapi.cede = api_cede; 3622 coroapi.cede = api_cede;
2159 coroapi.cede_notself = api_cede_notself; 3623 coroapi.cede_notself = api_cede_notself;
2160 coroapi.ready = api_ready; 3624 coroapi.ready = api_ready;
2161 coroapi.is_ready = api_is_ready; 3625 coroapi.is_ready = api_is_ready;
2162 coroapi.nready = &coro_nready; 3626 coroapi.nready = coro_nready;
2163 coroapi.current = coro_current; 3627 coroapi.current = coro_current;
2164 3628
2165 GCoroAPI = &coroapi; 3629 /*GCoroAPI = &coroapi;*/
2166 sv_setiv (sv, (IV)&coroapi); 3630 sv_setiv (sv, (IV)&coroapi);
2167 SvREADONLY_on (sv); 3631 SvREADONLY_on (sv);
2168 } 3632 }
2169} 3633}
3634
3635SV *
3636async (...)
3637 PROTOTYPE: &@
3638 CODE:
3639 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3640 api_ready (aTHX_ RETVAL);
3641 OUTPUT:
3642 RETVAL
3643
3644void
3645_destroy (Coro::State coro)
3646 CODE:
3647 /* used by the manager thread */
3648 coro_state_destroy (aTHX_ coro);
3649 coro_call_on_destroy (aTHX_ coro);
3650
3651void
3652terminate (...)
3653 CODE:
3654 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3655
3656void
3657cancel (...)
3658 CODE:
3659 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3660
3661int
3662safe_cancel (Coro::State self, ...)
3663 C_ARGS: aTHX_ self, &ST (1), items - 1
3664
3665void
3666schedule (...)
3667 CODE:
3668 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3669
3670void
3671schedule_to (...)
3672 CODE:
3673 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3674
3675void
3676cede_to (...)
3677 CODE:
3678 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3679
3680void
3681cede (...)
3682 CODE:
3683 CORO_EXECUTE_SLF_XS (slf_init_cede);
3684
3685void
3686cede_notself (...)
3687 CODE:
3688 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2170 3689
2171void 3690void
2172_set_current (SV *current) 3691_set_current (SV *current)
2173 PROTOTYPE: $ 3692 PROTOTYPE: $
2174 CODE: 3693 CODE:
… …
2177 3696
2178void 3697void
2179_set_readyhook (SV *hook) 3698_set_readyhook (SV *hook)
2180 PROTOTYPE: $ 3699 PROTOTYPE: $
2181 CODE: 3700 CODE:
2182 LOCK;
2183 SvREFCNT_dec (coro_readyhook); 3701 SvREFCNT_dec (coro_readyhook);
3702 SvGETMAGIC (hook);
3703 if (SvOK (hook))
3704 {
2184 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3705 coro_readyhook = newSVsv (hook);
2185 UNLOCK; 3706 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3707 }
3708 else
3709 {
3710 coro_readyhook = 0;
3711 CORO_READYHOOK = 0;
3712 }
2186 3713
2187int 3714int
2188prio (Coro::State coro, int newprio = 0) 3715prio (Coro::State coro, int newprio = 0)
3716 PROTOTYPE: $;$
2189 ALIAS: 3717 ALIAS:
2190 nice = 1 3718 nice = 1
2191 CODE: 3719 CODE:
2192{ 3720{
2193 RETVAL = coro->prio; 3721 RETVAL = coro->prio;
… …
2195 if (items > 1) 3723 if (items > 1)
2196 { 3724 {
2197 if (ix) 3725 if (ix)
2198 newprio = coro->prio - newprio; 3726 newprio = coro->prio - newprio;
2199 3727
2200 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3728 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2201 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3729 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2202 3730
2203 coro->prio = newprio; 3731 coro->prio = newprio;
2204 } 3732 }
2205} 3733}
2206 OUTPUT: 3734 OUTPUT:
… …
2208 3736
2209SV * 3737SV *
2210ready (SV *self) 3738ready (SV *self)
2211 PROTOTYPE: $ 3739 PROTOTYPE: $
2212 CODE: 3740 CODE:
2213 RETVAL = boolSV (api_ready (self)); 3741 RETVAL = boolSV (api_ready (aTHX_ self));
2214 OUTPUT: 3742 OUTPUT:
2215 RETVAL 3743 RETVAL
2216 3744
2217int 3745int
2218nready (...) 3746nready (...)
… …
2220 CODE: 3748 CODE:
2221 RETVAL = coro_nready; 3749 RETVAL = coro_nready;
2222 OUTPUT: 3750 OUTPUT:
2223 RETVAL 3751 RETVAL
2224 3752
2225# for async_pool speedup
2226void 3753void
2227_pool_1 (SV *cb) 3754suspend (Coro::State self)
3755 PROTOTYPE: $
2228 CODE: 3756 CODE:
2229{ 3757 self->flags |= CF_SUSPENDED;
2230 struct coro *coro = SvSTATE (coro_current);
2231 HV *hv = (HV *)SvRV (coro_current);
2232 AV *defav = GvAV (PL_defgv);
2233 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2234 AV *invoke_av;
2235 int i, len;
2236 3758
2237 if (!invoke) 3759void
3760resume (Coro::State self)
3761 PROTOTYPE: $
3762 CODE:
3763 self->flags &= ~CF_SUSPENDED;
3764
3765void
3766_pool_handler (...)
3767 CODE:
3768 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3769
3770void
3771async_pool (SV *cv, ...)
3772 PROTOTYPE: &@
3773 PPCODE:
3774{
3775 HV *hv = (HV *)av_pop (av_async_pool);
3776 AV *av = newAV ();
3777 SV *cb = ST (0);
3778 int i;
3779
3780 av_extend (av, items - 2);
3781 for (i = 1; i < items; ++i)
3782 av_push (av, SvREFCNT_inc_NN (ST (i)));
3783
3784 if ((SV *)hv == &PL_sv_undef)
2238 { 3785 {
2239 SV *old = PL_diehook; 3786 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2240 PL_diehook = 0; 3787 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2241 SvREFCNT_dec (old); 3788 SvREFCNT_dec (sv);
2242 croak ("\3async_pool terminate\2\n");
2243 } 3789 }
2244 3790
2245 SvREFCNT_dec (coro->saved_deffh);
2246 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2247
2248 hv_store (hv, "desc", sizeof ("desc") - 1,
2249 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2250
2251 invoke_av = (AV *)SvRV (invoke);
2252 len = av_len (invoke_av);
2253
2254 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2255
2256 if (len > 0)
2257 { 3791 {
2258 av_fill (defav, len - 1); 3792 struct coro *coro = SvSTATE_hv (hv);
2259 for (i = 0; i < len; ++i) 3793
2260 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3794 assert (!coro->invoke_cb);
3795 assert (!coro->invoke_av);
3796 coro->invoke_cb = SvREFCNT_inc (cb);
3797 coro->invoke_av = av;
2261 } 3798 }
2262 3799
3800 api_ready (aTHX_ (SV *)hv);
3801
3802 if (GIMME_V != G_VOID)
3803 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3804 else
2263 SvREFCNT_dec (invoke); 3805 SvREFCNT_dec (hv);
2264} 3806}
2265 3807
2266void 3808SV *
2267_pool_2 (SV *cb) 3809rouse_cb ()
3810 PROTOTYPE:
2268 CODE: 3811 CODE:
2269{ 3812 RETVAL = coro_new_rouse_cb (aTHX);
2270 struct coro *coro = SvSTATE (coro_current);
2271
2272 sv_setsv (cb, &PL_sv_undef);
2273
2274 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2275 coro->saved_deffh = 0;
2276
2277 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2278 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2279 {
2280 SV *old = PL_diehook;
2281 PL_diehook = 0;
2282 SvREFCNT_dec (old);
2283 croak ("\3async_pool terminate\2\n");
2284 }
2285
2286 av_clear (GvAV (PL_defgv));
2287 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2288 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2289
2290 coro->prio = 0;
2291
2292 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2293 api_trace (coro_current, 0);
2294
2295 av_push (av_async_pool, newSVsv (coro_current));
2296}
2297
2298#if 0
2299
2300void
2301_generator_call (...)
2302 PROTOTYPE: @
2303 PPCODE:
2304 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2305 xxxx
2306 abort ();
2307
2308SV *
2309gensub (SV *sub, ...)
2310 PROTOTYPE: &;@
2311 CODE:
2312{
2313 struct coro *coro;
2314 MAGIC *mg;
2315 CV *xcv;
2316 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2317 int i;
2318
2319 CvGV (ncv) = CvGV (cv);
2320 CvFILE (ncv) = CvFILE (cv);
2321
2322 Newz (0, coro, 1, struct coro);
2323 coro->args = newAV ();
2324 coro->flags = CF_NEW;
2325
2326 av_extend (coro->args, items - 1);
2327 for (i = 1; i < items; i++)
2328 av_push (coro->args, newSVsv (ST (i)));
2329
2330 CvISXSUB_on (ncv);
2331 CvXSUBANY (ncv).any_ptr = (void *)coro;
2332
2333 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2334
2335 CvXSUB (ncv) = CvXSUB (xcv);
2336 CvANON_on (ncv);
2337
2338 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2339 RETVAL = newRV_noinc ((SV *)ncv);
2340}
2341 OUTPUT: 3813 OUTPUT:
2342 RETVAL 3814 RETVAL
2343 3815
2344#endif
2345
2346
2347MODULE = Coro::State PACKAGE = Coro::AIO
2348
2349void 3816void
2350_get_state (SV *self) 3817rouse_wait (...)
3818 PROTOTYPE: ;$
2351 PPCODE: 3819 PPCODE:
2352{ 3820 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2353 AV *defav = GvAV (PL_defgv);
2354 AV *av = newAV ();
2355 int i;
2356 SV *data_sv = newSV (sizeof (struct io_state));
2357 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2358 SvCUR_set (data_sv, sizeof (struct io_state));
2359 SvPOK_only (data_sv);
2360
2361 data->errorno = errno;
2362 data->laststype = PL_laststype;
2363 data->laststatval = PL_laststatval;
2364 data->statcache = PL_statcache;
2365
2366 av_extend (av, AvFILLp (defav) + 1 + 1);
2367
2368 for (i = 0; i <= AvFILLp (defav); ++i)
2369 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2370
2371 av_push (av, data_sv);
2372
2373 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2374
2375 api_ready (self);
2376}
2377 3821
2378void 3822void
2379_set_state (SV *state) 3823on_enter (SV *block)
3824 ALIAS:
3825 on_leave = 1
2380 PROTOTYPE: $ 3826 PROTOTYPE: &
3827 CODE:
3828{
3829 struct coro *coro = SvSTATE_current;
3830 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3831
3832 block = s_get_cv_croak (block);
3833
3834 if (!*avp)
3835 *avp = newAV ();
3836
3837 av_push (*avp, SvREFCNT_inc (block));
3838
3839 if (!ix)
3840 on_enterleave_call (aTHX_ block);
3841
3842 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3843 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3844 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3845}
3846
3847
3848MODULE = Coro::State PACKAGE = PerlIO::cede
3849
3850BOOT:
3851 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3852
3853
3854MODULE = Coro::State PACKAGE = Coro::Semaphore
3855
3856SV *
3857new (SV *klass, SV *count = 0)
3858 CODE:
3859{
3860 int semcnt = 1;
3861
3862 if (count)
3863 {
3864 SvGETMAGIC (count);
3865
3866 if (SvOK (count))
3867 semcnt = SvIV (count);
3868 }
3869
3870 RETVAL = sv_bless (
3871 coro_waitarray_new (aTHX_ semcnt),
3872 GvSTASH (CvGV (cv))
3873 );
3874}
3875 OUTPUT:
3876 RETVAL
3877
3878# helper for Coro::Channel and others
3879SV *
3880_alloc (int count)
3881 CODE:
3882 RETVAL = coro_waitarray_new (aTHX_ count);
3883 OUTPUT:
3884 RETVAL
3885
3886SV *
3887count (SV *self)
3888 CODE:
3889 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3890 OUTPUT:
3891 RETVAL
3892
3893void
3894up (SV *self, int adjust = 1)
3895 ALIAS:
3896 adjust = 1
3897 CODE:
3898 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3899
3900void
3901down (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3904
3905void
3906wait (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3909
3910void
3911try (SV *self)
3912 PPCODE:
3913{
3914 AV *av = (AV *)SvRV (self);
3915 SV *count_sv = AvARRAY (av)[0];
3916 IV count = SvIVX (count_sv);
3917
3918 if (count > 0)
3919 {
3920 --count;
3921 SvIVX (count_sv) = count;
3922 XSRETURN_YES;
3923 }
3924 else
3925 XSRETURN_NO;
3926}
3927
3928void
3929waiters (SV *self)
3930 PPCODE:
3931{
3932 AV *av = (AV *)SvRV (self);
3933 int wcount = AvFILLp (av) + 1 - 1;
3934
3935 if (GIMME_V == G_SCALAR)
3936 XPUSHs (sv_2mortal (newSViv (wcount)));
3937 else
3938 {
3939 int i;
3940 EXTEND (SP, wcount);
3941 for (i = 1; i <= wcount; ++i)
3942 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3943 }
3944}
3945
3946MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3947
3948void
3949_may_delete (SV *sem, int count, int extra_refs)
2381 PPCODE: 3950 PPCODE:
2382{ 3951{
2383 AV *av = (AV *)SvRV (state); 3952 AV *av = (AV *)SvRV (sem);
2384 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2385 int i;
2386 3953
2387 errno = data->errorno; 3954 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2388 PL_laststype = data->laststype; 3955 && AvFILLp (av) == 0 /* no waiters, just count */
2389 PL_laststatval = data->laststatval; 3956 && SvIV (AvARRAY (av)[0]) == count)
2390 PL_statcache = data->statcache; 3957 XSRETURN_YES;
2391 3958
3959 XSRETURN_NO;
3960}
3961
3962MODULE = Coro::State PACKAGE = Coro::Signal
3963
3964SV *
3965new (SV *klass)
3966 CODE:
3967 RETVAL = sv_bless (
3968 coro_waitarray_new (aTHX_ 0),
3969 GvSTASH (CvGV (cv))
3970 );
3971 OUTPUT:
3972 RETVAL
3973
3974void
3975wait (...)
3976 CODE:
3977 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3978
3979void
3980broadcast (SV *self)
3981 CODE:
3982{
3983 AV *av = (AV *)SvRV (self);
3984 coro_signal_wake (aTHX_ av, AvFILLp (av));
3985}
3986
3987void
3988send (SV *self)
3989 CODE:
3990{
3991 AV *av = (AV *)SvRV (self);
3992
2392 EXTEND (SP, AvFILLp (av)); 3993 if (AvFILLp (av))
2393 for (i = 0; i < AvFILLp (av); ++i) 3994 coro_signal_wake (aTHX_ av, 1);
2394 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3995 else
3996 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2395} 3997}
3998
3999IV
4000awaited (SV *self)
4001 CODE:
4002 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4003 OUTPUT:
4004 RETVAL
2396 4005
2397 4006
2398MODULE = Coro::State PACKAGE = Coro::AnyEvent 4007MODULE = Coro::State PACKAGE = Coro::AnyEvent
2399 4008
2400BOOT: 4009BOOT:
2401 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 4010 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2402 4011
2403SV * 4012void
2404_schedule (...) 4013_schedule (...)
2405 PROTOTYPE: @
2406 CODE: 4014 CODE:
2407{ 4015{
2408 static int incede; 4016 static int incede;
2409 4017
2410 api_cede_notself (); 4018 api_cede_notself (aTHX);
2411 4019
2412 ++incede; 4020 ++incede;
2413 while (coro_nready >= incede && api_cede ()) 4021 while (coro_nready >= incede && api_cede (aTHX))
2414 ; 4022 ;
2415 4023
2416 sv_setsv (sv_activity, &PL_sv_undef); 4024 sv_setsv (sv_activity, &PL_sv_undef);
2417 if (coro_nready >= incede) 4025 if (coro_nready >= incede)
2418 { 4026 {
2419 PUSHMARK (SP); 4027 PUSHMARK (SP);
2420 PUTBACK; 4028 PUTBACK;
2421 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 4029 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2422 SPAGAIN;
2423 } 4030 }
2424 4031
2425 --incede; 4032 --incede;
2426} 4033}
2427 4034
2428 4035
2429MODULE = Coro::State PACKAGE = PerlIO::cede 4036MODULE = Coro::State PACKAGE = Coro::AIO
2430 4037
2431BOOT: 4038void
2432 PerlIO_define_layer (aTHX_ &PerlIO_cede); 4039_register (char *target, char *proto, SV *req)
4040 CODE:
4041{
4042 SV *req_cv = s_get_cv_croak (req);
4043 /* newXSproto doesn't return the CV on 5.8 */
4044 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4045 sv_setpv ((SV *)slf_cv, proto);
4046 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4047}
2433 4048
4049MODULE = Coro::State PACKAGE = Coro::Select
4050
4051void
4052patch_pp_sselect ()
4053 CODE:
4054 if (!coro_old_pp_sselect)
4055 {
4056 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4057 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4058 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4059 }
4060
4061void
4062unpatch_pp_sselect ()
4063 CODE:
4064 if (coro_old_pp_sselect)
4065 {
4066 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4067 coro_old_pp_sselect = 0;
4068 }
4069

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