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Comparing Coro/Coro/State.xs (file contents):
Revision 1.160 by root, Sat Sep 22 22:39:15 2007 UTC vs.
Revision 1.392 by root, Fri Apr 29 15:43:27 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#include <stdio.h> 18#include <stdio.h>
12#include <errno.h> 19#include <errno.h>
13#include <assert.h> 20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
34#endif
14 35
15#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
16# include <unistd.h> 37# include <unistd.h>
17# include <sys/mman.h> 38# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 56# define BOOT_PAGESIZE (void)0
36#endif 57#endif
37 58
38#if CORO_USE_VALGRIND 59#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 60# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 61#endif
44 62
45/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 64static int cctx_max_idle = 4;
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79 65
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
82#endif 68#endif
83 69
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 76# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 77#endif
92 78
93/* 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
94 * 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
95#define dSTACKLEVEL volatile char stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
97 88
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
99 90
100#if __GNUC__ >= 3 91#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
103#else 95#else
104# define attribute(x) 96# define attribute(x)
105# define BARRIER 97# define expect(expr,value) (expr)
98# define INLINE static
106#endif 99#endif
107 100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
108#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
109 105
110#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
111 108
112#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 110# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 111static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 112# endif
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 113#endif
120 114
121/* helper storage struct for Coro::AIO */ 115#ifdef __linux
122struct io_state 116# include <time.h> /* for timespec */
123{ 117# include <syscall.h> /* for SYS_* */
124 int errorno; 118# ifdef SYS_clock_gettime
125 I32 laststype; 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 120# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 122# endif
123#endif
129 124
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);
131
132static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 136static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
136 149
137/* async_pool helper stuff */ 150/* async_pool helper stuff */
138static SV *sv_pool_rss; 151static SV *sv_pool_rss;
139static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
157
158/* Coro::AnyEvent */
159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
141 166
142static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
144 169
170enum {
171 CC_MAPPED = 0x01,
172 CC_NOREUSE = 0x02, /* throw this away after tracing */
173 CC_TRACE = 0x04,
174 CC_TRACE_SUB = 0x08, /* trace sub calls */
175 CC_TRACE_LINE = 0x10, /* trace each statement */
176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
177};
178
145/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
146typedef struct coro_cctx { 180typedef struct coro_cctx
181{
147 struct coro_cctx *next; 182 struct coro_cctx *next;
148 183
149 /* the stack */ 184 /* the stack */
150 void *sptr; 185 void *sptr;
151 size_t ssize; 186 size_t ssize;
… …
154 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
155 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
156 JMPENV *top_env; 191 JMPENV *top_env;
157 coro_context cctx; 192 coro_context cctx;
158 193
194 U32 gen;
159#if CORO_USE_VALGRIND 195#if CORO_USE_VALGRIND
160 int valgrind_id; 196 int valgrind_id;
161#endif 197#endif
162 char inuse, mapped; 198 unsigned char flags;
163} coro_cctx; 199} coro_cctx;
200
201coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
164 204
165enum { 205enum {
166 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
167 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
168 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
169 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
170}; 211};
171 212
172/* this is a structure representing a perl-level coroutine */ 213/* the structure where most of the perl state is stored, overlaid on the cxstack */
173struct coro { 214typedef struct
174 /* the c coroutine allocated to this perl coroutine, if any */ 215{
175 coro_cctx *cctx; 216 SV *defsv;
176 217 AV *defav;
177 /* data associated with this coroutine (initial args) */ 218 SV *errsv;
178 AV *args; 219 SV *irsgv;
179 int refcnt; 220 HV *hinthv;
180 int save; /* CORO_SAVE flags */
181 int flags; /* CF_ flags */
182
183 /* optionally saved, might be zero */
184 AV *defav; /* @_ */
185 SV *defsv; /* $_ */
186 SV *errsv; /* $@ */
187 GV *deffh; /* default filehandle */
188 SV *irssv; /* $/ */
189 SV *irssv_sv; /* real $/ cache */
190
191#define VAR(name,type) type name; 221#define VAR(name,type) type name;
192# include "state.h" 222# include "state.h"
193#undef VAR 223#undef VAR
224} perl_slots;
225
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227
228/* this is a structure representing a perl-level coroutine */
229struct coro {
230 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx;
232
233 /* ready queue */
234 struct coro *next_ready;
235
236 /* state data */
237 struct CoroSLF slf_frame; /* saved slf frame */
238 AV *mainstack;
239 perl_slots *slot; /* basically the saved sp */
240
241 CV *startcv; /* the CV to execute */
242 AV *args; /* data associated with this coroutine (initial args) */
243 int refcnt; /* coroutines are refcounted, yes */
244 int flags; /* CF_ flags */
245 HV *hv; /* the perl hash associated with this coro, if any */
246 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
247
248 /* statistics */
249 int usecount; /* number of transfers to this coro */
194 250
195 /* coro process data */ 251 /* coro process data */
196 int prio; 252 int prio;
253 SV *except; /* exception to be thrown */
254 SV *rouse_cb;
255
256 /* async_pool */
257 SV *saved_deffh;
258 SV *invoke_cb;
259 AV *invoke_av;
260
261 /* on_enter/on_leave */
262 AV *on_enter;
263 AV *on_leave;
264
265 /* swap_sv */
266 AV *swap_sv;
267
268 /* times */
269 coro_ts t_cpu, t_real;
197 270
198 /* linked list */ 271 /* linked list */
199 struct coro *next, *prev; 272 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 273};
202 274
203typedef struct coro *Coro__State; 275typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 276typedef struct coro *Coro__State_or_hashref;
205 277
278/* the following variables are effectively part of the perl context */
279/* and get copied between struct coro and these variables */
280/* the mainr easonw e don't support windows process emulation */
281static struct CoroSLF slf_frame; /* the current slf frame */
282
206/** Coro ********************************************************************/ 283/** Coro ********************************************************************/
207 284
208#define PRIO_MAX 3 285#define CORO_PRIO_MAX 3
209#define PRIO_HIGH 1 286#define CORO_PRIO_HIGH 1
210#define PRIO_NORMAL 0 287#define CORO_PRIO_NORMAL 0
211#define PRIO_LOW -1 288#define CORO_PRIO_LOW -1
212#define PRIO_IDLE -3 289#define CORO_PRIO_IDLE -3
213#define PRIO_MIN -4 290#define CORO_PRIO_MIN -4
214 291
215/* for Coro.pm */ 292/* for Coro.pm */
216static SV *coro_current; 293static SV *coro_current;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 294static SV *coro_readyhook;
218static int coro_nready; 295static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
296static CV *cv_coro_run, *cv_coro_terminate;
219static struct coro *coro_first; 297static struct coro *coro_first;
298#define coro_nready coroapi.nready
299
300/** Coro::Select ************************************************************/
301
302static OP *(*coro_old_pp_sselect) (pTHX);
303static SV *coro_select_select;
304
305/* horrible hack, but if it works... */
306static OP *
307coro_pp_sselect (pTHX)
308{
309 dSP;
310 PUSHMARK (SP - 4); /* fake argument list */
311 XPUSHs (coro_select_select);
312 PUTBACK;
313
314 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
315 PL_op->op_flags |= OPf_STACKED;
316 PL_op->op_private = 0;
317 return PL_ppaddr [OP_ENTERSUB](aTHX);
318}
319
320/** time stuff **************************************************************/
321
322#ifdef HAS_GETTIMEOFDAY
323
324static void
325coro_u2time (pTHX_ UV ret[2])
326{
327 struct timeval tv;
328 gettimeofday (&tv, 0);
329
330 ret [0] = tv.tv_sec;
331 ret [1] = tv.tv_usec;
332}
333
334static double
335coro_nvtime ()
336{
337 struct timeval tv;
338 gettimeofday (&tv, 0);
339
340 return tv.tv_sec + tv.tv_usec * 1e-6;
341}
342
343static void
344time_init (pTHX)
345{
346 nvtime = coro_nvtime;
347 u2time = coro_u2time;
348}
349
350#else
351
352static void
353time_init (pTHX)
354{
355 SV **svp;
356
357 require_pv ("Time/HiRes.pm");
358
359 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
360
361 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
362 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
363
364 nvtime = INT2PTR (double (*)(), SvIV (*svp));
365
366 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
367 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
368}
369
370#endif
220 371
221/** lowlevel stuff **********************************************************/ 372/** lowlevel stuff **********************************************************/
222 373
374static SV *
375coro_get_sv (pTHX_ const char *name, int create)
376{
377#if PERL_VERSION_ATLEAST (5,10,0)
378 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
379 get_sv (name, create);
380#endif
381 return get_sv (name, create);
382}
383
223static AV * 384static AV *
385coro_get_av (pTHX_ const char *name, int create)
386{
387#if PERL_VERSION_ATLEAST (5,10,0)
388 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
389 get_av (name, create);
390#endif
391 return get_av (name, create);
392}
393
394static HV *
395coro_get_hv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_hv (name, create);
400#endif
401 return get_hv (name, create);
402}
403
404INLINE void
405coro_times_update ()
406{
407#ifdef coro_clock_gettime
408 struct timespec ts;
409
410 ts.tv_sec = ts.tv_nsec = 0;
411 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
412 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
413
414 ts.tv_sec = ts.tv_nsec = 0;
415 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
416 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
417#else
418 dTHX;
419 UV tv[2];
420
421 u2time (aTHX_ tv);
422 time_real [0] = tv [0];
423 time_real [1] = tv [1] * 1000;
424#endif
425}
426
427INLINE void
428coro_times_add (struct coro *c)
429{
430 c->t_real [1] += time_real [1];
431 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
432 c->t_real [0] += time_real [0];
433
434 c->t_cpu [1] += time_cpu [1];
435 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
436 c->t_cpu [0] += time_cpu [0];
437}
438
439INLINE void
440coro_times_sub (struct coro *c)
441{
442 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
443 c->t_real [1] -= time_real [1];
444 c->t_real [0] -= time_real [0];
445
446 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
447 c->t_cpu [1] -= time_cpu [1];
448 c->t_cpu [0] -= time_cpu [0];
449}
450
451/*****************************************************************************/
452/* magic glue */
453
454#define CORO_MAGIC_type_cv 26
455#define CORO_MAGIC_type_state PERL_MAGIC_ext
456
457#define CORO_MAGIC_NN(sv, type) \
458 (expect_true (SvMAGIC (sv)->mg_type == type) \
459 ? SvMAGIC (sv) \
460 : mg_find (sv, type))
461
462#define CORO_MAGIC(sv, type) \
463 (expect_true (SvMAGIC (sv)) \
464 ? CORO_MAGIC_NN (sv, type) \
465 : 0)
466
467#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
468#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
469
470INLINE struct coro *
471SvSTATE_ (pTHX_ SV *coro)
472{
473 HV *stash;
474 MAGIC *mg;
475
476 if (SvROK (coro))
477 coro = SvRV (coro);
478
479 if (expect_false (SvTYPE (coro) != SVt_PVHV))
480 croak ("Coro::State object required");
481
482 stash = SvSTASH (coro);
483 if (expect_false (stash != coro_stash && stash != coro_state_stash))
484 {
485 /* very slow, but rare, check */
486 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
487 croak ("Coro::State object required");
488 }
489
490 mg = CORO_MAGIC_state (coro);
491 return (struct coro *)mg->mg_ptr;
492}
493
494#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
495
496/* faster than SvSTATE, but expects a coroutine hv */
497#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
498#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
499
500/*****************************************************************************/
501/* padlist management and caching */
502
503static AV *
224coro_clone_padlist (pTHX_ CV *cv) 504coro_derive_padlist (pTHX_ CV *cv)
225{ 505{
226 AV *padlist = CvPADLIST (cv); 506 AV *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 507 AV *newpadlist, *newpad;
228 508
229 newpadlist = newAV (); 509 newpadlist = newAV ();
230 AvREAL_off (newpadlist); 510 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0) 511#if PERL_VERSION_ATLEAST (5,10,0)
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 512 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
233#else 513#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 514 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif 515#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 516 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist); 517 --AvFILLp (padlist);
238 518
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 519 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
240 av_store (newpadlist, 1, (SV *)newpad); 520 av_store (newpadlist, 1, (SV *)newpad);
241 521
242 return newpadlist; 522 return newpadlist;
243} 523}
244 524
245static void 525static void
246free_padlist (pTHX_ AV *padlist) 526free_padlist (pTHX_ AV *padlist)
247{ 527{
248 /* may be during global destruction */ 528 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 529 if (!IN_DESTRUCT)
250 { 530 {
251 I32 i = AvFILLp (padlist); 531 I32 i = AvFILLp (padlist);
252 while (i >= 0) 532
533 while (i > 0) /* special-case index 0 */
253 { 534 {
254 SV **svp = av_fetch (padlist, i--, FALSE); 535 /* we try to be extra-careful here */
255 if (svp) 536 AV *av = (AV *)AvARRAY (padlist)[i--];
256 { 537 I32 j = AvFILLp (av);
257 SV *sv; 538
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 539 while (j >= 0)
540 SvREFCNT_dec (AvARRAY (av)[j--]);
541
542 AvFILLp (av) = -1;
259 SvREFCNT_dec (sv); 543 SvREFCNT_dec (av);
260
261 SvREFCNT_dec (*svp);
262 }
263 } 544 }
264 545
546 SvREFCNT_dec (AvARRAY (padlist)[0]);
547
548 AvFILLp (padlist) = -1;
265 SvREFCNT_dec ((SV*)padlist); 549 SvREFCNT_dec ((SV*)padlist);
266 } 550 }
267} 551}
268 552
269static int 553static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 554coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 555{
272 AV *padlist; 556 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 557 AV *av = (AV *)mg->mg_obj;
558
559 /* perl manages to free our internal AV and _then_ call us */
560 if (IN_DESTRUCT)
561 return 0;
274 562
275 /* casting is fun. */ 563 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 564 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 565 free_padlist (aTHX_ padlist);
278 566
279 SvREFCNT_dec (av); 567 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280 568
281 return 0; 569 return 0;
282} 570}
283 571
284#define PERL_MAGIC_coro PERL_MAGIC_ext 572static MGVTBL coro_cv_vtbl = {
285 573 0, 0, 0, 0,
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 574 coro_cv_free
287 575};
288#define CORO_MAGIC(cv) \
289 SvMAGIC (cv) \
290 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
291 ? SvMAGIC (cv) \
292 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
293 : 0
294 576
295/* the next two functions merely cache the padlists */ 577/* the next two functions merely cache the padlists */
296static void 578static void
297get_padlist (pTHX_ CV *cv) 579get_padlist (pTHX_ CV *cv)
298{ 580{
299 MAGIC *mg = CORO_MAGIC (cv); 581 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 582 AV *av;
301 583
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 584 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 585 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
304 else 586 else
305 { 587 {
306#if CORO_PREFER_PERL_FUNCTIONS 588#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 589 /* this is probably cleaner? but also slower! */
590 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 591 CV *cp = Perl_cv_clone (aTHX_ cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 592 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 593 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 594 SvREFCNT_dec (cp);
312#else 595#else
313 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 596 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
314#endif 597#endif
315 } 598 }
316} 599}
317 600
318static void 601static void
319put_padlist (pTHX_ CV *cv) 602put_padlist (pTHX_ CV *cv)
320{ 603{
321 MAGIC *mg = CORO_MAGIC (cv); 604 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av; 605 AV *av;
323 606
324 if (!mg) 607 if (expect_false (!mg))
325 { 608 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
326 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
327 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
328 mg->mg_virtual = &vtbl_coro;
329 mg->mg_obj = (SV *)newAV ();
330 }
331 609
332 av = (AV *)mg->mg_obj; 610 av = (AV *)mg->mg_obj;
333 611
334 if (AvFILLp (av) >= AvMAX (av)) 612 if (expect_false (AvFILLp (av) >= AvMAX (av)))
335 av_extend (av, AvMAX (av) + 1); 613 av_extend (av, AvFILLp (av) + 1);
336 614
337 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 615 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338} 616}
339 617
340/** load & save, init *******************************************************/ 618/** load & save, init *******************************************************/
341 619
342#define SB do { 620/* swap sv heads, at least logically */
343#define SE } while (0) 621static void
622swap_svs (pTHX_ Coro__State c)
623{
624 int i;
344 625
345#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 626 for (i = 0; i <= AvFILLp (c->swap_sv); )
627 {
628 SV *a = AvARRAY (c->swap_sv)[i++];
629 SV *b = AvARRAY (c->swap_sv)[i++];
630
631 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
632 SV tmp;
633
634 /* swap sv_any */
635 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
636
637 /* swap sv_flags */
638 SvFLAGS (&tmp) = SvFLAGS (a);
639 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
640 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
641
642#if PERL_VERSION_ATLEAST (5,10,0)
643 /* perl 5.10 complicates this _quite_ a bit, but it also is
644 * much faster, so no quarrels here. alternatively, we could
645 * sv_upgrade to avoid this.
646 */
647 {
648 /* swap sv_u */
649 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
650
651 /* if SvANY points to the head, we need to adjust the pointers,
652 * as the pointer for a still points to b, and maybe vice versa.
653 */
654 #define svany_in_head(type) \
655 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
656
657 if (svany_in_head (SvTYPE (a)))
658 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
659
660 if (svany_in_head (SvTYPE (b)))
661 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
662 }
663#endif
664 }
665}
666
667#define SWAP_SVS(coro) \
668 if (expect_false ((coro)->swap_sv)) \
669 swap_svs (aTHX_ (coro))
670
671static void
672on_enterleave_call (pTHX_ SV *cb);
346 673
347static void 674static void
348load_perl (pTHX_ Coro__State c) 675load_perl (pTHX_ Coro__State c)
349{ 676{
677 perl_slots *slot = c->slot;
678 c->slot = 0;
679
680 PL_mainstack = c->mainstack;
681
682 GvSV (PL_defgv) = slot->defsv;
683 GvAV (PL_defgv) = slot->defav;
684 GvSV (PL_errgv) = slot->errsv;
685 GvSV (irsgv) = slot->irsgv;
686 GvHV (PL_hintgv) = slot->hinthv;
687
350#define VAR(name,type) PL_ ## name = c->name; 688 #define VAR(name,type) PL_ ## name = slot->name;
351# include "state.h" 689 # include "state.h"
352#undef VAR 690 #undef VAR
353
354 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
355 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
356 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
357 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
358
359 if (c->irssv)
360 {
361 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
362 {
363 SvREFCNT_dec (c->irssv);
364 c->irssv = 0;
365 }
366 else
367 {
368 REPLACE_SV (PL_rs, c->irssv);
369 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
370 sv_setsv (c->irssv_sv, PL_rs);
371 }
372 }
373 691
374 { 692 {
375 dSP; 693 dSP;
694
376 CV *cv; 695 CV *cv;
377 696
378 /* now do the ugly restore mess */ 697 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 698 while (expect_true (cv = (CV *)POPs))
380 { 699 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 700 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 701 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 702 CvPADLIST (cv) = (AV *)POPs;
384 } 703 }
385 704
386 PUTBACK; 705 PUTBACK;
387 } 706 }
707
708 slf_frame = c->slf_frame;
709 CORO_THROW = c->except;
710
711 if (expect_false (enable_times))
712 {
713 if (expect_false (!times_valid))
714 coro_times_update ();
715
716 coro_times_sub (c);
717 }
718
719 if (expect_false (c->on_enter))
720 {
721 int i;
722
723 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
724 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
725 }
726
727 SWAP_SVS (c);
388} 728}
389 729
390static void 730static void
391save_perl (pTHX_ Coro__State c) 731save_perl (pTHX_ Coro__State c)
392{ 732{
733 SWAP_SVS (c);
734
735 if (expect_false (c->on_leave))
736 {
737 int i;
738
739 for (i = AvFILLp (c->on_leave); i >= 0; --i)
740 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
741 }
742
743 times_valid = 0;
744
745 if (expect_false (enable_times))
746 {
747 coro_times_update (); times_valid = 1;
748 coro_times_add (c);
749 }
750
751 c->except = CORO_THROW;
752 c->slf_frame = slf_frame;
753
393 { 754 {
394 dSP; 755 dSP;
395 I32 cxix = cxstack_ix; 756 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 757 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 758 PERL_SI *top_si = PL_curstackinfo;
… …
403 764
404 XPUSHs (Nullsv); 765 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 766 /* this loop was inspired by pp_caller */
406 for (;;) 767 for (;;)
407 { 768 {
408 while (cxix >= 0) 769 while (expect_true (cxix >= 0))
409 { 770 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 771 PERL_CONTEXT *cx = &ccstk[cxix--];
411 772
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 773 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
413 { 774 {
414 CV *cv = cx->blk_sub.cv; 775 CV *cv = cx->blk_sub.cv;
415 776
416 if (CvDEPTH (cv)) 777 if (expect_true (CvDEPTH (cv)))
417 { 778 {
418 EXTEND (SP, 3); 779 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 780 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 781 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 782 PUSHs ((SV *)cv);
422 783
423 CvDEPTH (cv) = 0; 784 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 785 get_padlist (aTHX_ cv);
425 } 786 }
426 } 787 }
427 } 788 }
428 789
429 if (top_si->si_type == PERLSI_MAIN) 790 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 791 break;
431 792
432 top_si = top_si->si_prev; 793 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 794 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 795 cxix = top_si->si_cxix;
435 } 796 }
436 797
437 PUTBACK; 798 PUTBACK;
438 } 799 }
439 800
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 801 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 802 /* we manually unroll here, as usually 2 slots is enough */
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 803 if (SLOT_COUNT >= 1) CXINC;
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 804 if (SLOT_COUNT >= 2) CXINC;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 805 if (SLOT_COUNT >= 3) CXINC;
806 {
807 unsigned int i;
808 for (i = 3; i < SLOT_COUNT; ++i)
809 CXINC;
810 }
811 cxstack_ix -= SLOT_COUNT; /* undo allocation */
445 812
813 c->mainstack = PL_mainstack;
814
815 {
816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
817
818 slot->defav = GvAV (PL_defgv);
819 slot->defsv = DEFSV;
820 slot->errsv = ERRSV;
821 slot->irsgv = GvSV (irsgv);
822 slot->hinthv = GvHV (PL_hintgv);
823
446#define VAR(name,type)c->name = PL_ ## name; 824 #define VAR(name,type) slot->name = PL_ ## name;
447# include "state.h" 825 # include "state.h"
448#undef VAR 826 #undef VAR
827 }
449} 828}
450 829
451/* 830/*
452 * allocate various perl stacks. This is an exact copy 831 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 832 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 833 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 834 * not usually need a lot of stackspace.
456 */ 835 */
457#if CORO_PREFER_PERL_FUNCTIONS 836#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 837# define coro_init_stacks(thx) init_stacks ()
459#else 838#else
460static void 839static void
461coro_init_stacks (pTHX) 840coro_init_stacks (pTHX)
462{ 841{
463 PL_curstackinfo = new_stackinfo(64, 6); 842 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 843 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 844 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 846
468 PL_stack_base = AvARRAY(PL_curstack); 847 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 848 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 849 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 850
472 New(50,PL_tmps_stack,64,SV*); 851 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 852 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 853 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 854 PL_tmps_max = 32;
476 855
477 New(54,PL_markstack,16,I32); 856 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 857 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 858 PL_markstack_max = PL_markstack + 16;
480 859
481#ifdef SET_MARK_OFFSET 860#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 861 SET_MARK_OFFSET;
483#endif 862#endif
484 863
485 New(54,PL_scopestack,16,I32); 864 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 865 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 866 PL_scopestack_max = 8;
488 867
489 New(54,PL_savestack,64,ANY); 868 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 869 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 870 PL_savestack_max = 24;
492 871
493#if !PERL_VERSION_ATLEAST (5,9,0) 872#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 873 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 874 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 875 PL_retstack_max = 4;
497#endif 876#endif
498} 877}
… …
500 879
501/* 880/*
502 * destroy the stacks, the callchain etc... 881 * destroy the stacks, the callchain etc...
503 */ 882 */
504static void 883static void
505coro_destroy_stacks (pTHX) 884coro_destruct_stacks (pTHX)
506{ 885{
507 if (!IN_DESTRUCT)
508 {
509 /* restore all saved variables and stuff */
510 LEAVE_SCOPE (0);
511 assert (PL_tmps_floor == -1);
512
513 /* free all temporaries */
514 FREETMPS;
515 assert (PL_tmps_ix == -1);
516
517 /* unwind all extra stacks */
518 POPSTACK_TO (PL_mainstack);
519
520 /* unwind main stack */
521 dounwind (-1);
522 }
523
524 while (PL_curstackinfo->si_next) 886 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 887 PL_curstackinfo = PL_curstackinfo->si_next;
526 888
527 while (PL_curstackinfo) 889 while (PL_curstackinfo)
528 { 890 {
… …
538 900
539 Safefree (PL_tmps_stack); 901 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 902 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 903 Safefree (PL_scopestack);
542 Safefree (PL_savestack); 904 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 905#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 906 Safefree (PL_retstack);
545#endif 907#endif
546} 908}
547 909
910#define CORO_RSS \
911 rss += sizeof (SYM (curstackinfo)); \
912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
918
548static size_t 919static size_t
549coro_rss (struct coro *coro) 920coro_rss (pTHX_ struct coro *coro)
550{ 921{
551 size_t rss = sizeof (coro); 922 size_t rss = sizeof (*coro);
552 923
553 if (coro->mainstack) 924 if (coro->mainstack)
554 { 925 {
555 if (coro->flags & CF_RUNNING) 926 if (coro->flags & CF_RUNNING)
556 { 927 {
557 #define VAR(name,type)coro->name = PL_ ## name; 928 #define SYM(sym) PL_ ## sym
558 # include "state.h" 929 CORO_RSS;
559 #undef VAR 930 #undef SYM
560 } 931 }
932 else
933 {
934 #define SYM(sym) coro->slot->sym
935 CORO_RSS;
936 #undef SYM
937 }
938 }
561 939
562 rss += sizeof (coro->curstackinfo); 940 return rss;
563 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 941}
564 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
566 rss += coro->tmps_max * sizeof (SV *);
567 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
568 rss += coro->scopestack_max * sizeof (I32);
569 rss += coro->savestack_max * sizeof (ANY);
570 942
571#if !PERL_VERSION_ATLEAST (5,9,0) 943/** coroutine stack handling ************************************************/
572 rss += coro->retstack_max * sizeof (OP *); 944
945static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
948
949/* apparently < 5.8.8 */
950#ifndef MgPV_nolen_const
951#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
952 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
953 (const char*)(mg)->mg_ptr)
573#endif 954#endif
955
956/*
957 * This overrides the default magic get method of %SIG elements.
958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
959 * and instead of trying to save and restore the hash elements, we just provide
960 * readback here.
961 */
962static int
963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
964{
965 const char *s = MgPV_nolen_const (mg);
966
967 if (*s == '_')
574 } 968 {
969 SV **svp = 0;
575 970
971 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
972 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
973
974 if (svp)
975 {
976 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
977 return 0;
978 }
979 }
980
981 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
982}
983
984static int
985coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
986{
987 const char *s = MgPV_nolen_const (mg);
988
989 if (*s == '_')
990 {
991 SV **svp = 0;
992
993 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
994 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
995
996 if (svp)
997 {
998 SV *old = *svp;
999 *svp = 0;
1000 SvREFCNT_dec (old);
1001 return 0;
1002 }
1003 }
1004
1005 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1006}
1007
1008static int
1009coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1010{
1011 const char *s = MgPV_nolen_const (mg);
1012
1013 if (*s == '_')
1014 {
1015 SV **svp = 0;
1016
1017 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1019
1020 if (svp)
1021 {
1022 SV *old = *svp;
1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1024 SvREFCNT_dec (old);
1025 return 0;
1026 }
1027 }
1028
1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1030}
1031
1032static void
1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
1034{
1035 /* kind of mega-hacky, but works */
1036 ta->next = ta->prev = (struct coro *)ta;
1037}
1038
1039static int
1040slf_check_nop (pTHX_ struct CoroSLF *frame)
1041{
576 return rss; 1042 return 0;
577} 1043}
578 1044
579/** coroutine stack handling ************************************************/
580
581static void 1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053static void NOINLINE /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 1054init_perl (pTHX_ struct coro *coro)
583{ 1055{
584 /* 1056 /*
585 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
586 */ 1058 */
587 coro_init_stacks (aTHX); 1059 coro_init_stacks (aTHX);
588 1060
1061 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 1062 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 1063 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
592 PL_curpm = 0; 1068 PL_curpm = 0;
1069 PL_curpad = 0;
593 PL_localizing = 0; 1070 PL_localizing = 0;
594 PL_dirty = 0;
595 PL_restartop = 0; 1071 PL_restartop = 0;
1072#if PERL_VERSION_ATLEAST (5,10,0)
1073 PL_parser = 0;
1074#endif
1075 PL_hints = 0;
1076
1077 /* recreate the die/warn hooks */
1078 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1079 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1080
1081 GvSV (PL_defgv) = newSV (0);
1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
1083 GvSV (PL_errgv) = newSV (0);
1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
1086 PL_rs = newSVsv (GvSV (irsgv));
1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 1088
597 { 1089 {
598 dSP; 1090 dSP;
599 LOGOP myop; 1091 UNOP myop;
600 1092
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 1093 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
606 myop.op_flags = OPf_WANT_VOID; 1096 myop.op_flags = OPf_WANT_VOID;
607 1097
608 PUSHMARK (SP); 1098 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 1099 PUSHs ((SV *)coro->startcv);
610 PUTBACK; 1100 PUTBACK;
611 PL_op = (OP *)&myop; 1101 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN;
614 } 1103 }
615 1104
616 ENTER; /* necessary e.g. for dounwind */ 1105 /* this newly created coroutine might be run on an existing cctx which most
617} 1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1107 */
1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
618 1110
1111 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1112 init_perl_op.op_next = PL_op;
1113 init_perl_op.op_type = OP_ENTERSUB;
1114 init_perl_op.op_ppaddr = pp_slf;
1115 /* no flags etc. required, as an init function won't be called */
1116
1117 PL_op = (OP *)&init_perl_op;
1118
1119 /* copy throw, in case it was set before init_perl */
1120 CORO_THROW = coro->except;
1121
1122 SWAP_SVS (coro);
1123
1124 if (expect_false (enable_times))
1125 {
1126 coro_times_update ();
1127 coro_times_sub (coro);
1128 }
1129}
1130
619static void 1131static void
1132coro_unwind_stacks (pTHX)
1133{
1134 if (!IN_DESTRUCT)
1135 {
1136 /* restore all saved variables and stuff */
1137 LEAVE_SCOPE (0);
1138 assert (PL_tmps_floor == -1);
1139
1140 /* free all temporaries */
1141 FREETMPS;
1142 assert (PL_tmps_ix == -1);
1143
1144 /* unwind all extra stacks */
1145 POPSTACK_TO (PL_mainstack);
1146
1147 /* unwind main stack */
1148 dounwind (-1);
1149 }
1150}
1151
1152static void
1153destroy_perl (pTHX_ struct coro *coro)
1154{
1155 SV *svf [9];
1156
1157 {
1158 struct coro *current = SvSTATE_current;
1159
1160 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1161
1162 save_perl (aTHX_ current);
1163 load_perl (aTHX_ coro);
1164
1165 coro_unwind_stacks (aTHX);
1166 coro_destruct_stacks (aTHX);
1167
1168 /* restore swapped sv's */
1169 SWAP_SVS (coro);
1170
1171 // now save some sv's to be free'd later
1172 svf [0] = GvSV (PL_defgv);
1173 svf [1] = (SV *)GvAV (PL_defgv);
1174 svf [2] = GvSV (PL_errgv);
1175 svf [3] = (SV *)PL_defoutgv;
1176 svf [4] = PL_rs;
1177 svf [5] = GvSV (irsgv);
1178 svf [6] = (SV *)GvHV (PL_hintgv);
1179 svf [7] = PL_diehook;
1180 svf [8] = PL_warnhook;
1181 assert (9 == sizeof (svf) / sizeof (*svf));
1182
1183 load_perl (aTHX_ current);
1184 }
1185
1186 {
1187 unsigned int i;
1188
1189 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1190 SvREFCNT_dec (svf [i]);
1191
1192 SvREFCNT_dec (coro->saved_deffh);
1193 SvREFCNT_dec (coro->rouse_cb);
1194 SvREFCNT_dec (coro->invoke_cb);
1195 SvREFCNT_dec (coro->invoke_av);
1196 }
1197}
1198
1199INLINE void
620free_coro_mortal (pTHX) 1200free_coro_mortal (pTHX)
621{ 1201{
622 if (coro_mortal) 1202 if (expect_true (coro_mortal))
623 { 1203 {
624 SvREFCNT_dec (coro_mortal); 1204 SvREFCNT_dec (coro_mortal);
625 coro_mortal = 0; 1205 coro_mortal = 0;
626 } 1206 }
627} 1207}
628 1208
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 1209static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 1210runops_trace (pTHX)
631/* during execution of a perl program */ 1211{
1212 COP *oldcop = 0;
1213 int oldcxix = -2;
1214
1215 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1216 {
1217 PERL_ASYNC_CHECK ();
1218
1219 if (cctx_current->flags & CC_TRACE_ALL)
1220 {
1221 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1222 {
1223 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1224 SV **bot, **top;
1225 AV *av = newAV (); /* return values */
1226 SV **cb;
1227 dSP;
1228
1229 GV *gv = CvGV (cx->blk_sub.cv);
1230 SV *fullname = sv_2mortal (newSV (0));
1231 if (isGV (gv))
1232 gv_efullname3 (fullname, gv, 0);
1233
1234 bot = PL_stack_base + cx->blk_oldsp + 1;
1235 top = cx->blk_gimme == G_ARRAY ? SP + 1
1236 : cx->blk_gimme == G_SCALAR ? bot + 1
1237 : bot;
1238
1239 av_extend (av, top - bot);
1240 while (bot < top)
1241 av_push (av, SvREFCNT_inc_NN (*bot++));
1242
1243 PL_runops = RUNOPS_DEFAULT;
1244 ENTER;
1245 SAVETMPS;
1246 EXTEND (SP, 3);
1247 PUSHMARK (SP);
1248 PUSHs (&PL_sv_no);
1249 PUSHs (fullname);
1250 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1251 PUTBACK;
1252 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1253 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1254 SPAGAIN;
1255 FREETMPS;
1256 LEAVE;
1257 PL_runops = runops_trace;
1258 }
1259
1260 if (oldcop != PL_curcop)
1261 {
1262 oldcop = PL_curcop;
1263
1264 if (PL_curcop != &PL_compiling)
1265 {
1266 SV **cb;
1267
1268 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1269 {
1270 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1271
1272 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1273 {
1274 dSP;
1275 GV *gv = CvGV (cx->blk_sub.cv);
1276 SV *fullname = sv_2mortal (newSV (0));
1277
1278 if (isGV (gv))
1279 gv_efullname3 (fullname, gv, 0);
1280
1281 PL_runops = RUNOPS_DEFAULT;
1282 ENTER;
1283 SAVETMPS;
1284 EXTEND (SP, 3);
1285 PUSHMARK (SP);
1286 PUSHs (&PL_sv_yes);
1287 PUSHs (fullname);
1288 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1289 PUTBACK;
1290 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1291 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1292 SPAGAIN;
1293 FREETMPS;
1294 LEAVE;
1295 PL_runops = runops_trace;
1296 }
1297
1298 oldcxix = cxstack_ix;
1299 }
1300
1301 if (cctx_current->flags & CC_TRACE_LINE)
1302 {
1303 dSP;
1304
1305 PL_runops = RUNOPS_DEFAULT;
1306 ENTER;
1307 SAVETMPS;
1308 EXTEND (SP, 3);
1309 PL_runops = RUNOPS_DEFAULT;
1310 PUSHMARK (SP);
1311 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1312 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1313 PUTBACK;
1314 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1315 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1316 SPAGAIN;
1317 FREETMPS;
1318 LEAVE;
1319 PL_runops = runops_trace;
1320 }
1321 }
1322 }
1323 }
1324 }
1325
1326 TAINT_NOT;
1327 return 0;
1328}
1329
1330static struct CoroSLF cctx_ssl_frame;
1331
1332static void
1333slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1334{
1335 ta->prev = 0;
1336}
1337
1338static int
1339slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1340{
1341 *frame = cctx_ssl_frame;
1342
1343 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1344}
1345
1346/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
632static void NOINLINE 1347static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx) 1348cctx_prepare (pTHX)
634{ 1349{
635 dSP; 1350 PL_top_env = &PL_start_env;
636 LOGOP myop;
637 1351
638 Zero (&myop, 1, LOGOP); 1352 if (cctx_current->flags & CC_TRACE)
639 myop.op_next = PL_op; 1353 PL_runops = runops_trace;
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
641 1354
642 PUSHMARK (SP); 1355 /* we already must be executing an SLF op, there is no other valid way
643 EXTEND (SP, 2); 1356 * that can lead to creation of a new cctx */
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1357 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1358 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
646 PUTBACK; 1359
647 PL_op = (OP *)&myop; 1360 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1361 cctx_ssl_frame = slf_frame;
649 SPAGAIN; 1362
1363 slf_frame.prepare = slf_prepare_set_stacklevel;
1364 slf_frame.check = slf_check_set_stacklevel;
1365}
1366
1367/* the tail of transfer: execute stuff we can only do after a transfer */
1368INLINE void
1369transfer_tail (pTHX)
1370{
1371 free_coro_mortal (aTHX);
650} 1372}
651 1373
652/* 1374/*
653 * this is a _very_ stripped down perl interpreter ;) 1375 * this is a _very_ stripped down perl interpreter ;)
654 */ 1376 */
655static void 1377static void
656coro_run (void *arg) 1378cctx_run (void *arg)
657{ 1379{
1380#ifdef USE_ITHREADS
1381# if CORO_PTHREAD
1382 PERL_SET_CONTEXT (coro_thx);
1383# endif
1384#endif
1385 {
658 dTHX; 1386 dTHX;
659 1387
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1388 /* normally we would need to skip the entersub here */
661 UNLOCK; 1389 /* not doing so will re-execute it, which is exactly what we want */
1390 /* PL_nop = PL_nop->op_next */
662 1391
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1392 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1393 cctx_prepare (aTHX);
667 1394
1395 /* cctx_run is the alternative tail of transfer() */
1396 transfer_tail (aTHX);
1397
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1398 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1399 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1400 perl_run (PL_curinterp);
671
672 /* 1401 /*
1402 * Unfortunately, there is no way to get at the return values of the
1403 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1404 * runtime errors here, as this is just a random interpreter, not a thread.
1405 */
1406
1407 /*
673 * If perl-run returns we assume exit() was being called or the coro 1408 * If perl-run returns we assume exit() was being called or the coro
674 * fell off the end, which seems to be the only valid (non-bug) 1409 * fell off the end, which seems to be the only valid (non-bug)
675 * reason for perl_run to return. We try to exit by jumping to the 1410 * reason for perl_run to return. We try to exit by jumping to the
676 * bootstrap-time "top" top_env, as we cannot restore the "main" 1411 * bootstrap-time "top" top_env, as we cannot restore the "main"
677 * coroutine as Coro has no such concept 1412 * coroutine as Coro has no such concept.
1413 * This actually isn't valid with the pthread backend, but OSes requiring
1414 * that backend are too broken to do it in a standards-compliant way.
678 */ 1415 */
679 PL_top_env = main_top_env; 1416 PL_top_env = main_top_env;
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1417 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1418 }
681} 1419}
682 1420
683static coro_cctx * 1421static coro_cctx *
684cctx_new () 1422cctx_new ()
685{ 1423{
686 coro_cctx *cctx; 1424 coro_cctx *cctx;
1425
1426 ++cctx_count;
1427 New (0, cctx, 1, coro_cctx);
1428
1429 cctx->gen = cctx_gen;
1430 cctx->flags = 0;
1431 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1432
1433 return cctx;
1434}
1435
1436/* create a new cctx only suitable as source */
1437static coro_cctx *
1438cctx_new_empty ()
1439{
1440 coro_cctx *cctx = cctx_new ();
1441
1442 cctx->sptr = 0;
1443 coro_create (&cctx->cctx, 0, 0, 0, 0);
1444
1445 return cctx;
1446}
1447
1448/* create a new cctx suitable as destination/running a perl interpreter */
1449static coro_cctx *
1450cctx_new_run ()
1451{
1452 coro_cctx *cctx = cctx_new ();
687 void *stack_start; 1453 void *stack_start;
688 size_t stack_size; 1454 size_t stack_size;
689 1455
690 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx);
693
694#if HAVE_MMAP 1456#if HAVE_MMAP
695
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1457 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
697 /* mmap supposedly does allocate-on-write for us */ 1458 /* mmap supposedly does allocate-on-write for us */
698 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1459 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1460
700 if (cctx->sptr != (void *)-1) 1461 if (cctx->sptr != (void *)-1)
701 { 1462 {
702# if CORO_STACKGUARD 1463 #if CORO_STACKGUARD
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1464 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
704# endif 1465 #endif
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1466 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1467 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
707 cctx->mapped = 1; 1468 cctx->flags |= CC_MAPPED;
708 } 1469 }
709 else 1470 else
710#endif 1471#endif
711 { 1472 {
712 cctx->ssize = coro_stacksize * (long)sizeof (long); 1473 cctx->ssize = cctx_stacksize * (long)sizeof (long);
713 New (0, cctx->sptr, coro_stacksize, long); 1474 New (0, cctx->sptr, cctx_stacksize, long);
714 1475
715 if (!cctx->sptr) 1476 if (!cctx->sptr)
716 { 1477 {
717 perror ("FATAL: unable to allocate stack for coroutine"); 1478 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1479 _exit (EXIT_FAILURE);
719 } 1480 }
720 1481
721 stack_start = cctx->sptr; 1482 stack_start = cctx->sptr;
722 stack_size = cctx->ssize; 1483 stack_size = cctx->ssize;
723 } 1484 }
724 1485
725 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1486 #if CORO_USE_VALGRIND
1487 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1488 #endif
1489
726 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1490 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
727 1491
728 return cctx; 1492 return cctx;
729} 1493}
730 1494
731static void 1495static void
732cctx_destroy (coro_cctx *cctx) 1496cctx_destroy (coro_cctx *cctx)
733{ 1497{
734 if (!cctx) 1498 if (!cctx)
735 return; 1499 return;
736 1500
1501 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1502
737 --cctx_count; 1503 --cctx_count;
1504 coro_destroy (&cctx->cctx);
738 1505
1506 /* coro_transfer creates new, empty cctx's */
1507 if (cctx->sptr)
1508 {
739#if CORO_USE_VALGRIND 1509 #if CORO_USE_VALGRIND
740 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1510 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1511 #endif
1512
1513#if HAVE_MMAP
1514 if (cctx->flags & CC_MAPPED)
1515 munmap (cctx->sptr, cctx->ssize);
1516 else
741#endif 1517#endif
742
743#if HAVE_MMAP
744 if (cctx->mapped)
745 munmap (cctx->sptr, cctx->ssize);
746 else
747#endif
748 Safefree (cctx->sptr); 1518 Safefree (cctx->sptr);
1519 }
749 1520
750 Safefree (cctx); 1521 Safefree (cctx);
751} 1522}
1523
1524/* wether this cctx should be destructed */
1525#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1526
753static coro_cctx * 1527static coro_cctx *
754cctx_get (pTHX) 1528cctx_get (pTHX)
755{ 1529{
756 while (cctx_first) 1530 while (expect_true (cctx_first))
757 { 1531 {
758 coro_cctx *cctx = cctx_first; 1532 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1533 cctx_first = cctx->next;
760 --cctx_idle; 1534 --cctx_idle;
761 1535
762 if (cctx->ssize >= coro_stacksize) 1536 if (expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1537 return cctx;
764 1538
765 cctx_destroy (cctx); 1539 cctx_destroy (cctx);
766 } 1540 }
767 1541
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1542 return cctx_new_run ();
770} 1543}
771 1544
772static void 1545static void
773cctx_put (coro_cctx *cctx) 1546cctx_put (coro_cctx *cctx)
774{ 1547{
1548 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1549
775 /* free another cctx if overlimit */ 1550 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1551 if (expect_false (cctx_idle >= cctx_max_idle))
777 { 1552 {
778 coro_cctx *first = cctx_first; 1553 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1554 cctx_first = first->next;
780 --cctx_idle; 1555 --cctx_idle;
781 1556
782 assert (!first->inuse);
783 cctx_destroy (first); 1557 cctx_destroy (first);
784 } 1558 }
785 1559
786 ++cctx_idle; 1560 ++cctx_idle;
787 cctx->next = cctx_first; 1561 cctx->next = cctx_first;
788 cctx_first = cctx; 1562 cctx_first = cctx;
789} 1563}
790 1564
791/** coroutine switching *****************************************************/ 1565/** coroutine switching *****************************************************/
792 1566
793/* never call directly, always through the coro_state_transfer global variable */ 1567static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1568transfer_check (pTHX_ struct coro *prev, struct coro *next)
1569{
1570 /* TODO: throwing up here is considered harmful */
1571
1572 if (expect_true (prev != next))
1573 {
1574 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1575 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1576
1577 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1578 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1579
1580#if !PERL_VERSION_ATLEAST (5,10,0)
1581 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1582 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1583#endif
1584 }
1585}
1586
1587/* always use the TRANSFER macro */
1588static void NOINLINE /* noinline so we have a fixed stackframe */
1589transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1590{
797 dSTACKLEVEL; 1591 dSTACKLEVEL;
798 1592
799 /* sometimes transfer is only called to set idle_sp */ 1593 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1594 if (expect_false (!prev))
801 { 1595 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1596 cctx_current->idle_sp = STACKLEVEL;
803 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1597 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 }
805 else if (prev != next)
806 { 1598 }
1599 else if (expect_true (prev != next))
1600 {
807 coro_cctx *prev__cctx; 1601 coro_cctx *cctx_prev;
808 1602
809 if (prev->flags & CF_NEW) 1603 if (expect_false (prev->flags & CF_NEW))
810 { 1604 {
811 /* create a new empty context */ 1605 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx);
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1606 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1607 prev->flags |= CF_RUNNING;
816 } 1608 }
817 1609
818 /*TODO: must not croak here */
819 if (!prev->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
821
822 if (next->flags & CF_RUNNING)
823 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
824
825 if (next->flags & CF_DESTROYED)
826 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
827
828 prev->flags &= ~CF_RUNNING; 1610 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1611 next->flags |= CF_RUNNING;
830 1612
831 LOCK; 1613 /* first get rid of the old state */
1614 save_perl (aTHX_ prev);
832 1615
833 if (next->flags & CF_NEW) 1616 if (expect_false (next->flags & CF_NEW))
834 { 1617 {
835 /* need to start coroutine */ 1618 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1619 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1620 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1621 init_perl (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1622 }
844 else 1623 else
1624 load_perl (aTHX_ next);
1625
1626 /* possibly untie and reuse the cctx */
1627 if (expect_true (
1628 cctx_current->idle_sp == STACKLEVEL
1629 && !(cctx_current->flags & CC_TRACE)
1630 && !force_cctx
1631 ))
845 { 1632 {
846 /* coroutine already started */ 1633 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1634 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
848 load_perl (aTHX_ next); 1635
1636 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1637 /* without this the next cctx_get might destroy the running cctx while still in use */
1638 if (expect_false (CCTX_EXPIRED (cctx_current)))
1639 if (expect_true (!next->cctx))
1640 next->cctx = cctx_get (aTHX);
1641
1642 cctx_put (cctx_current);
849 } 1643 }
1644 else
1645 prev->cctx = cctx_current;
850 1646
851 prev__cctx = prev->cctx; 1647 ++next->usecount;
852 1648
853 /* possibly "free" the cctx */ 1649 cctx_prev = cctx_current;
854 if (prev__cctx->idle_sp == STACKLEVEL) 1650 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1651
1652 next->cctx = 0;
1653
1654 if (expect_false (cctx_prev != cctx_current))
855 { 1655 {
856 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1656 cctx_prev->top_env = PL_top_env;
857 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1657 PL_top_env = cctx_current->top_env;
858 1658 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
859 prev->cctx = 0;
860
861 cctx_put (prev__cctx);
862 prev__cctx->inuse = 0;
863 } 1659 }
864 1660
865 if (!next->cctx) 1661 transfer_tail (aTHX);
866 {
867 next->cctx = cctx_get (aTHX);
868 assert (!next->cctx->inuse);
869 next->cctx->inuse = 1;
870 }
871
872 if (prev__cctx != next->cctx)
873 {
874 prev__cctx->top_env = PL_top_env;
875 PL_top_env = next->cctx->top_env;
876 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877 }
878
879 free_coro_mortal (aTHX);
880 UNLOCK;
881 } 1662 }
882} 1663}
883 1664
884struct transfer_args 1665#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
885{
886 struct coro *prev, *next;
887};
888
889#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1666#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1667
891/** high level stuff ********************************************************/ 1668/** high level stuff ********************************************************/
892 1669
893static int 1670static int
894coro_state_destroy (pTHX_ struct coro *coro) 1671coro_state_destroy (pTHX_ struct coro *coro)
895{ 1672{
896 if (coro->flags & CF_DESTROYED) 1673 if (coro->flags & CF_DESTROYED)
897 return 0; 1674 return 0;
1675
1676 if (coro->on_destroy && !PL_dirty)
1677 coro->on_destroy (aTHX_ coro);
898 1678
899 coro->flags |= CF_DESTROYED; 1679 coro->flags |= CF_DESTROYED;
900 1680
901 if (coro->flags & CF_READY) 1681 if (coro->flags & CF_READY)
902 { 1682 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1683 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1684 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1685 --coro_nready;
907 UNLOCK;
908 } 1686 }
909 else 1687 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1688 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
911 1689
912 if (coro->mainstack && coro->mainstack != main_mainstack) 1690 if (coro->mainstack
913 { 1691 && coro->mainstack != main_mainstack
914 struct coro temp; 1692 && coro->slot
915 1693 && !PL_dirty)
916 assert (!(coro->flags & CF_RUNNING));
917
918 Zero (&temp, 1, struct coro);
919 temp.save = CORO_SAVE_ALL;
920
921 if (coro->flags & CF_RUNNING)
922 croak ("FATAL: tried to destroy currently running coroutine");
923
924 save_perl (aTHX_ &temp);
925 load_perl (aTHX_ coro); 1694 destroy_perl (aTHX_ coro);
926
927 coro_destroy_stacks (aTHX);
928
929 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
930
931 coro->mainstack = 0;
932 }
933
934 cctx_destroy (coro->cctx);
935 SvREFCNT_dec (coro->args);
936 1695
937 if (coro->next) coro->next->prev = coro->prev; 1696 if (coro->next) coro->next->prev = coro->prev;
938 if (coro->prev) coro->prev->next = coro->next; 1697 if (coro->prev) coro->prev->next = coro->next;
939 if (coro == coro_first) coro_first = coro->next; 1698 if (coro == coro_first) coro_first = coro->next;
1699
1700 cctx_destroy (coro->cctx);
1701 SvREFCNT_dec (coro->startcv);
1702 SvREFCNT_dec (coro->args);
1703 SvREFCNT_dec (coro->swap_sv);
1704 SvREFCNT_dec (CORO_THROW);
940 1705
941 return 1; 1706 return 1;
942} 1707}
943 1708
944static int 1709static int
… …
977#else 1742#else
978# define MGf_DUP 0 1743# define MGf_DUP 0
979#endif 1744#endif
980}; 1745};
981 1746
982static struct coro *
983SvSTATE_ (pTHX_ SV *coro)
984{
985 HV *stash;
986 MAGIC *mg;
987
988 if (SvROK (coro))
989 coro = SvRV (coro);
990
991 stash = SvSTASH (coro);
992 if (stash != coro_stash && stash != coro_state_stash)
993 {
994 /* very slow, but rare, check */
995 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
996 croak ("Coro::State object required");
997 }
998
999 mg = CORO_MAGIC (coro);
1000 return (struct coro *)mg->mg_ptr;
1001}
1002
1003#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1004
1005static void 1747static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1748prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1749{
1008 ta->prev = SvSTATE (prev_sv); 1750 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1751 ta->next = SvSTATE (next_sv);
1752 TRANSFER_CHECK (*ta);
1010} 1753}
1011 1754
1012static void 1755static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1756api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1757{
1758 struct coro_transfer_args ta;
1759
1760 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1761 TRANSFER (ta, 1);
1762}
1763
1764/** Coro ********************************************************************/
1765
1766INLINE void
1767coro_enq (pTHX_ struct coro *coro)
1768{
1769 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1770
1771 SvREFCNT_inc_NN (coro->hv);
1772
1773 coro->next_ready = 0;
1774 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1775 ready [1] = coro;
1776}
1777
1778INLINE struct coro *
1779coro_deq (pTHX)
1780{
1781 int prio;
1782
1783 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1784 {
1785 struct coro **ready = coro_ready [prio];
1786
1787 if (ready [0])
1788 {
1789 struct coro *coro = ready [0];
1790 ready [0] = coro->next_ready;
1791 return coro;
1792 }
1793 }
1794
1795 return 0;
1796}
1797
1798static void
1799invoke_sv_ready_hook_helper (void)
1014{ 1800{
1015 dTHX; 1801 dTHX;
1016 struct transfer_args ta; 1802 dSP;
1017 1803
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1804 ENTER;
1019 TRANSFER (ta); 1805 SAVETMPS;
1806
1807 PUSHMARK (SP);
1808 PUTBACK;
1809 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1810
1811 FREETMPS;
1812 LEAVE;
1020} 1813}
1021 1814
1022static int 1815static int
1023api_save (SV *coro_sv, int new_save) 1816api_ready (pTHX_ SV *coro_sv)
1024{ 1817{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv); 1818 struct coro *coro = SvSTATE (coro_sv);
1027 int old_save = coro->save;
1028
1029 if (new_save >= 0)
1030 coro->save = new_save;
1031
1032 return old_save;
1033}
1034
1035/** Coro ********************************************************************/
1036
1037static void
1038coro_enq (pTHX_ SV *coro_sv)
1039{
1040 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1041}
1042
1043static SV *
1044coro_deq (pTHX_ int min_prio)
1045{
1046 int prio = PRIO_MAX - PRIO_MIN;
1047
1048 min_prio -= PRIO_MIN;
1049 if (min_prio < 0)
1050 min_prio = 0;
1051
1052 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1053 if (AvFILLp (coro_ready [prio]) >= 0)
1054 return av_shift (coro_ready [prio]);
1055
1056 return 0;
1057}
1058
1059static int
1060api_ready (SV *coro_sv)
1061{
1062 dTHX;
1063 struct coro *coro;
1064
1065 if (SvROK (coro_sv))
1066 coro_sv = SvRV (coro_sv);
1067
1068 coro = SvSTATE (coro_sv);
1069 1819
1070 if (coro->flags & CF_READY) 1820 if (coro->flags & CF_READY)
1071 return 0; 1821 return 0;
1072 1822
1073 coro->flags |= CF_READY; 1823 coro->flags |= CF_READY;
1074 1824
1075 LOCK; 1825 coro_enq (aTHX_ coro);
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1826
1077 ++coro_nready; 1827 if (!coro_nready++)
1078 UNLOCK; 1828 if (coroapi.readyhook)
1829 coroapi.readyhook ();
1079 1830
1080 return 1; 1831 return 1;
1081} 1832}
1082 1833
1083static int 1834static int
1084api_is_ready (SV *coro_sv) 1835api_is_ready (pTHX_ SV *coro_sv)
1085{ 1836{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1837 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1838}
1089 1839
1840/* expects to own a reference to next->hv */
1841INLINE void
1842prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1843{
1844 SV *prev_sv = SvRV (coro_current);
1845
1846 ta->prev = SvSTATE_hv (prev_sv);
1847 ta->next = next;
1848
1849 TRANSFER_CHECK (*ta);
1850
1851 SvRV_set (coro_current, (SV *)next->hv);
1852
1853 free_coro_mortal (aTHX);
1854 coro_mortal = prev_sv;
1855}
1856
1090static void 1857static void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1858prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1859{
1093 SV *prev_sv, *next_sv;
1094
1095 for (;;) 1860 for (;;)
1096 { 1861 {
1097 LOCK; 1862 struct coro *next = coro_deq (aTHX);
1098 next_sv = coro_deq (aTHX_ PRIO_MIN);
1099 1863
1864 if (expect_true (next))
1865 {
1866 /* cannot transfer to destroyed coros, skip and look for next */
1867 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1868 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1869 else
1870 {
1871 next->flags &= ~CF_READY;
1872 --coro_nready;
1873
1874 prepare_schedule_to (aTHX_ ta, next);
1875 break;
1876 }
1877 }
1878 else
1879 {
1100 /* nothing to schedule: call the idle handler */ 1880 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1881 if (SvROK (sv_idle)
1882 && SvOBJECT (SvRV (sv_idle)))
1883 {
1884 if (SvRV (sv_idle) == SvRV (coro_current))
1885 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1886
1887 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1888 api_ready (aTHX_ SvRV (sv_idle));
1889 --coro_nready;
1890 }
1891 else
1892 {
1893 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1894 dSP;
1895
1896 ENTER;
1897 SAVETMPS;
1898
1899 PUSHMARK (SP);
1900 PUTBACK;
1901 call_sv (sv_idle, G_VOID | G_DISCARD);
1902
1903 FREETMPS;
1904 LEAVE;
1905 }
1906 }
1907 }
1908}
1909
1910INLINE void
1911prepare_cede (pTHX_ struct coro_transfer_args *ta)
1912{
1913 api_ready (aTHX_ coro_current);
1914 prepare_schedule (aTHX_ ta);
1915}
1916
1917INLINE void
1918prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1919{
1920 SV *prev = SvRV (coro_current);
1921
1922 if (coro_nready)
1923 {
1924 prepare_schedule (aTHX_ ta);
1925 api_ready (aTHX_ prev);
1926 }
1927 else
1928 prepare_nop (aTHX_ ta);
1929}
1930
1931static void
1932api_schedule (pTHX)
1933{
1934 struct coro_transfer_args ta;
1935
1936 prepare_schedule (aTHX_ &ta);
1937 TRANSFER (ta, 1);
1938}
1939
1940static void
1941api_schedule_to (pTHX_ SV *coro_sv)
1942{
1943 struct coro_transfer_args ta;
1944 struct coro *next = SvSTATE (coro_sv);
1945
1946 SvREFCNT_inc_NN (coro_sv);
1947 prepare_schedule_to (aTHX_ &ta, next);
1948}
1949
1950static int
1951api_cede (pTHX)
1952{
1953 struct coro_transfer_args ta;
1954
1955 prepare_cede (aTHX_ &ta);
1956
1957 if (expect_true (ta.prev != ta.next))
1958 {
1959 TRANSFER (ta, 1);
1960 return 1;
1961 }
1962 else
1963 return 0;
1964}
1965
1966static int
1967api_cede_notself (pTHX)
1968{
1969 if (coro_nready)
1970 {
1971 struct coro_transfer_args ta;
1972
1973 prepare_cede_notself (aTHX_ &ta);
1974 TRANSFER (ta, 1);
1975 return 1;
1976 }
1977 else
1978 return 0;
1979}
1980
1981static void
1982api_trace (pTHX_ SV *coro_sv, int flags)
1983{
1984 struct coro *coro = SvSTATE (coro_sv);
1985
1986 if (coro->flags & CF_RUNNING)
1987 croak ("cannot enable tracing on a running coroutine, caught");
1988
1989 if (flags & CC_TRACE)
1990 {
1991 if (!coro->cctx)
1992 coro->cctx = cctx_new_run ();
1993 else if (!(coro->cctx->flags & CC_TRACE))
1994 croak ("cannot enable tracing on coroutine with custom stack, caught");
1995
1996 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1997 }
1998 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1999 {
2000 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2001
2002 if (coro->flags & CF_RUNNING)
2003 PL_runops = RUNOPS_DEFAULT;
2004 else
2005 coro->slot->runops = RUNOPS_DEFAULT;
2006 }
2007}
2008
2009static void
2010coro_call_on_destroy (pTHX_ struct coro *coro)
2011{
2012 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2013
2014 if (on_destroyp)
2015 {
2016 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2017 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2018 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2019
2020 while (AvFILLp (on_destroy) >= 0)
2021 {
2022 dSP; /* don't disturb outer sp */
2023 SV *cb = av_pop (on_destroy);
2024
2025 PUSHMARK (SP);
2026
2027 if (statusp)
2028 {
2029 int i;
2030 EXTEND (SP, AvFILLp (status) + 1);
2031
2032 for (i = 0; i <= AvFILLp (status); ++i)
2033 PUSHs (AvARRAY (status)[i]);
2034 }
2035
2036 PUTBACK;
2037 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2038 }
2039 }
2040}
2041
2042static void
2043coro_set_status (HV *coro_hv, SV **arg, int items)
2044{
2045 AV *av = newAV ();
2046
2047 /* items are actually not so common, so optimise for this case */
2048 if (items)
2049 {
2050 int i;
2051
2052 av_extend (av, items - 1);
2053
2054 for (i = 0; i < items; ++i)
2055 av_push (av, SvREFCNT_inc_NN (arg [i]));
2056 }
2057
2058 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2059}
2060
2061static void
2062slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2063{
2064 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2065 api_ready (aTHX_ sv_manager);
2066
2067 frame->prepare = prepare_schedule;
2068 frame->check = slf_check_repeat;
2069
2070 /* as a minor optimisation, we could unwind all stacks here */
2071 /* but that puts extra pressure on pp_slf, and is not worth much */
2072 /*coro_unwind_stacks (aTHX);*/
2073}
2074
2075static void
2076slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2077{
2078 HV *coro_hv = (HV *)SvRV (coro_current);
2079
2080 coro_set_status (coro_hv, arg, items);
2081 slf_init_terminate_cancel_common (frame, coro_hv);
2082}
2083
2084static void
2085slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2086{
2087 HV *coro_hv;
2088 struct coro *coro;
2089
2090 if (items <= 0)
2091 croak ("Coro::cancel called without coro object,");
2092
2093 coro = SvSTATE (arg [0]);
2094 coro_hv = coro->hv;
2095
2096 coro_set_status (coro_hv, arg + 1, items - 1);
2097
2098 /* cancelling the current coro is allowed, and equals terminate */
2099 if (coro_hv == (HV *)SvRV (coro_current))
2100 slf_init_terminate_cancel_common (frame, coro_hv);
2101 else
2102 {
2103 /* otherwise we cancel ourselves */
2104 coro_state_destroy (aTHX_ coro);
2105 coro_call_on_destroy (aTHX_ coro);
2106
2107 frame->prepare = prepare_nop;
2108 frame->check = slf_check_nop;
2109 }
2110}
2111
2112/*****************************************************************************/
2113/* async pool handler */
2114
2115static int
2116slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2117{
2118 HV *hv = (HV *)SvRV (coro_current);
2119 struct coro *coro = (struct coro *)frame->data;
2120
2121 if (!coro->invoke_cb)
2122 return 1; /* loop till we have invoke */
2123 else
2124 {
2125 hv_store (hv, "desc", sizeof ("desc") - 1,
2126 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2127
2128 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2129
2130 {
2131 dSP;
2132 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2133 PUTBACK;
2134 }
2135
2136 SvREFCNT_dec (GvAV (PL_defgv));
2137 GvAV (PL_defgv) = coro->invoke_av;
2138 coro->invoke_av = 0;
2139
2140 return 0;
2141 }
2142}
2143
2144static void
2145slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2146{
2147 HV *hv = (HV *)SvRV (coro_current);
2148 struct coro *coro = SvSTATE_hv ((SV *)hv);
2149
2150 if (expect_true (coro->saved_deffh))
2151 {
2152 /* subsequent iteration */
2153 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2154 coro->saved_deffh = 0;
2155
2156 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2157 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2158 {
2159 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2160 coro->invoke_av = newAV ();
2161
2162 frame->prepare = prepare_nop;
2163 }
2164 else
2165 {
2166 av_clear (GvAV (PL_defgv));
2167 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2168
2169 coro->prio = 0;
2170
2171 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2172 api_trace (aTHX_ coro_current, 0);
2173
2174 frame->prepare = prepare_schedule;
2175 av_push (av_async_pool, SvREFCNT_inc (hv));
2176 }
2177 }
2178 else
2179 {
2180 /* first iteration, simply fall through */
2181 frame->prepare = prepare_nop;
2182 }
2183
2184 frame->check = slf_check_pool_handler;
2185 frame->data = (void *)coro;
2186}
2187
2188/*****************************************************************************/
2189/* rouse callback */
2190
2191#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2192
2193static void
2194coro_rouse_callback (pTHX_ CV *cv)
2195{
2196 dXSARGS;
2197 SV *data = (SV *)S_GENSUB_ARG;
2198
2199 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2200 {
2201 /* first call, set args */
2202 SV *coro = SvRV (data);
2203 AV *av = newAV ();
2204
2205 SvRV_set (data, (SV *)av);
2206
2207 /* better take a full copy of the arguments */
2208 while (items--)
2209 av_store (av, items, newSVsv (ST (items)));
2210
2211 api_ready (aTHX_ coro);
2212 SvREFCNT_dec (coro);
2213 }
2214
2215 XSRETURN_EMPTY;
2216}
2217
2218static int
2219slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2220{
2221 SV *data = (SV *)frame->data;
2222
2223 if (CORO_THROW)
2224 return 0;
2225
2226 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2227 return 1;
2228
2229 /* now push all results on the stack */
2230 {
2231 dSP;
2232 AV *av = (AV *)SvRV (data);
2233 int i;
2234
2235 EXTEND (SP, AvFILLp (av) + 1);
2236 for (i = 0; i <= AvFILLp (av); ++i)
2237 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2238
2239 /* we have stolen the elements, so set length to zero and free */
2240 AvFILLp (av) = -1;
2241 av_undef (av);
2242
2243 PUTBACK;
2244 }
2245
2246 return 0;
2247}
2248
2249static void
2250slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2251{
2252 SV *cb;
2253
2254 if (items)
2255 cb = arg [0];
2256 else
2257 {
2258 struct coro *coro = SvSTATE_current;
2259
2260 if (!coro->rouse_cb)
2261 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2262
2263 cb = sv_2mortal (coro->rouse_cb);
2264 coro->rouse_cb = 0;
2265 }
2266
2267 if (!SvROK (cb)
2268 || SvTYPE (SvRV (cb)) != SVt_PVCV
2269 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2270 croak ("Coro::rouse_wait called with illegal callback argument,");
2271
2272 {
2273 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2274 SV *data = (SV *)S_GENSUB_ARG;
2275
2276 frame->data = (void *)data;
2277 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2278 frame->check = slf_check_rouse_wait;
2279 }
2280}
2281
2282static SV *
2283coro_new_rouse_cb (pTHX)
2284{
2285 HV *hv = (HV *)SvRV (coro_current);
2286 struct coro *coro = SvSTATE_hv (hv);
2287 SV *data = newRV_inc ((SV *)hv);
2288 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2289
2290 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2291 SvREFCNT_dec (data); /* magicext increases the refcount */
2292
2293 SvREFCNT_dec (coro->rouse_cb);
2294 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2295
2296 return cb;
2297}
2298
2299/*****************************************************************************/
2300/* schedule-like-function opcode (SLF) */
2301
2302static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2303static const CV *slf_cv;
2304static SV **slf_argv;
2305static int slf_argc, slf_arga; /* count, allocated */
2306static I32 slf_ax; /* top of stack, for restore */
2307
2308/* this restores the stack in the case we patched the entersub, to */
2309/* recreate the stack frame as perl will on following calls */
2310/* since entersub cleared the stack */
2311static OP *
2312pp_restore (pTHX)
2313{
2314 int i;
2315 SV **SP = PL_stack_base + slf_ax;
2316
2317 PUSHMARK (SP);
2318
2319 EXTEND (SP, slf_argc + 1);
2320
2321 for (i = 0; i < slf_argc; ++i)
2322 PUSHs (sv_2mortal (slf_argv [i]));
2323
2324 PUSHs ((SV *)CvGV (slf_cv));
2325
2326 RETURNOP (slf_restore.op_first);
2327}
2328
2329static void
2330slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2331{
2332 SV **arg = (SV **)slf_frame.data;
2333
2334 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2335}
2336
2337static void
2338slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2339{
2340 if (items != 2)
2341 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2342
2343 frame->prepare = slf_prepare_transfer;
2344 frame->check = slf_check_nop;
2345 frame->data = (void *)arg; /* let's hope it will stay valid */
2346}
2347
2348static void
2349slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 frame->prepare = prepare_schedule;
2352 frame->check = slf_check_nop;
2353}
2354
2355static void
2356slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2357{
2358 struct coro *next = (struct coro *)slf_frame.data;
2359
2360 SvREFCNT_inc_NN (next->hv);
2361 prepare_schedule_to (aTHX_ ta, next);
2362}
2363
2364static void
2365slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2366{
2367 if (!items)
2368 croak ("Coro::schedule_to expects a coroutine argument, caught");
2369
2370 frame->data = (void *)SvSTATE (arg [0]);
2371 frame->prepare = slf_prepare_schedule_to;
2372 frame->check = slf_check_nop;
2373}
2374
2375static void
2376slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2377{
2378 api_ready (aTHX_ SvRV (coro_current));
2379
2380 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2381}
2382
2383static void
2384slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2385{
2386 frame->prepare = prepare_cede;
2387 frame->check = slf_check_nop;
2388}
2389
2390static void
2391slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2392{
2393 frame->prepare = prepare_cede_notself;
2394 frame->check = slf_check_nop;
2395}
2396
2397/*
2398 * these not obviously related functions are all rolled into one
2399 * function to increase chances that they all will call transfer with the same
2400 * stack offset
2401 * SLF stands for "schedule-like-function".
2402 */
2403static OP *
2404pp_slf (pTHX)
2405{
2406 I32 checkmark; /* mark SP to see how many elements check has pushed */
2407
2408 /* set up the slf frame, unless it has already been set-up */
2409 /* the latter happens when a new coro has been started */
2410 /* or when a new cctx was attached to an existing coroutine */
2411 if (expect_true (!slf_frame.prepare))
2412 {
2413 /* first iteration */
2414 dSP;
2415 SV **arg = PL_stack_base + TOPMARK + 1;
2416 int items = SP - arg; /* args without function object */
2417 SV *gv = *sp;
2418
2419 /* do a quick consistency check on the "function" object, and if it isn't */
2420 /* for us, divert to the real entersub */
2421 if (SvTYPE (gv) != SVt_PVGV
2422 || !GvCV (gv)
2423 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2424 return PL_ppaddr[OP_ENTERSUB](aTHX);
2425
2426 if (!(PL_op->op_flags & OPf_STACKED))
2427 {
2428 /* ampersand-form of call, use @_ instead of stack */
2429 AV *av = GvAV (PL_defgv);
2430 arg = AvARRAY (av);
2431 items = AvFILLp (av) + 1;
2432 }
2433
2434 /* now call the init function, which needs to set up slf_frame */
2435 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2436 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2437
2438 /* pop args */
2439 SP = PL_stack_base + POPMARK;
2440
2441 PUTBACK;
2442 }
2443
2444 /* now that we have a slf_frame, interpret it! */
2445 /* we use a callback system not to make the code needlessly */
2446 /* complicated, but so we can run multiple perl coros from one cctx */
2447
2448 do
2449 {
2450 struct coro_transfer_args ta;
2451
2452 slf_frame.prepare (aTHX_ &ta);
2453 TRANSFER (ta, 0);
2454
2455 checkmark = PL_stack_sp - PL_stack_base;
2456 }
2457 while (slf_frame.check (aTHX_ &slf_frame));
2458
2459 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2460
2461 /* exception handling */
2462 if (expect_false (CORO_THROW))
2463 {
2464 SV *exception = sv_2mortal (CORO_THROW);
2465
2466 CORO_THROW = 0;
2467 sv_setsv (ERRSV, exception);
2468 croak (0);
2469 }
2470
2471 /* return value handling - mostly like entersub */
2472 /* make sure we put something on the stack in scalar context */
2473 if (GIMME_V == G_SCALAR)
2474 {
2475 dSP;
2476 SV **bot = PL_stack_base + checkmark;
2477
2478 if (sp == bot) /* too few, push undef */
2479 bot [1] = &PL_sv_undef;
2480 else if (sp != bot + 1) /* too many, take last one */
2481 bot [1] = *sp;
2482
2483 SP = bot + 1;
2484
2485 PUTBACK;
2486 }
2487
2488 return NORMAL;
2489}
2490
2491static void
2492api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2493{
2494 int i;
2495 SV **arg = PL_stack_base + ax;
2496 int items = PL_stack_sp - arg + 1;
2497
2498 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2499
2500 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2501 && PL_op->op_ppaddr != pp_slf)
2502 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2503
2504 CvFLAGS (cv) |= CVf_SLF;
2505 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2506 slf_cv = cv;
2507
2508 /* we patch the op, and then re-run the whole call */
2509 /* we have to put the same argument on the stack for this to work */
2510 /* and this will be done by pp_restore */
2511 slf_restore.op_next = (OP *)&slf_restore;
2512 slf_restore.op_type = OP_CUSTOM;
2513 slf_restore.op_ppaddr = pp_restore;
2514 slf_restore.op_first = PL_op;
2515
2516 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2517
2518 if (PL_op->op_flags & OPf_STACKED)
2519 {
2520 if (items > slf_arga)
2521 {
2522 slf_arga = items;
2523 Safefree (slf_argv);
2524 New (0, slf_argv, slf_arga, SV *);
2525 }
2526
2527 slf_argc = items;
2528
2529 for (i = 0; i < items; ++i)
2530 slf_argv [i] = SvREFCNT_inc (arg [i]);
2531 }
2532 else
2533 slf_argc = 0;
2534
2535 PL_op->op_ppaddr = pp_slf;
2536 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2537
2538 PL_op = (OP *)&slf_restore;
2539}
2540
2541/*****************************************************************************/
2542/* dynamic wind */
2543
2544static void
2545on_enterleave_call (pTHX_ SV *cb)
2546{
2547 dSP;
2548
2549 PUSHSTACK;
2550
2551 PUSHMARK (SP);
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD);
2554 SPAGAIN;
2555
2556 POPSTACK;
2557}
2558
2559static SV *
2560coro_avp_pop_and_free (pTHX_ AV **avp)
2561{
2562 AV *av = *avp;
2563 SV *res = av_pop (av);
2564
2565 if (AvFILLp (av) < 0)
2566 {
2567 *avp = 0;
2568 SvREFCNT_dec (av);
2569 }
2570
2571 return res;
2572}
2573
2574static void
2575coro_pop_on_enter (pTHX_ void *coro)
2576{
2577 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2578 SvREFCNT_dec (cb);
2579}
2580
2581static void
2582coro_pop_on_leave (pTHX_ void *coro)
2583{
2584 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2585 on_enterleave_call (aTHX_ sv_2mortal (cb));
2586}
2587
2588/*****************************************************************************/
2589/* PerlIO::cede */
2590
2591typedef struct
2592{
2593 PerlIOBuf base;
2594 NV next, every;
2595} PerlIOCede;
2596
2597static IV
2598PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2599{
2600 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2601
2602 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2603 self->next = nvtime () + self->every;
2604
2605 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2606}
2607
2608static SV *
2609PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2610{
2611 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2612
2613 return newSVnv (self->every);
2614}
2615
2616static IV
2617PerlIOCede_flush (pTHX_ PerlIO *f)
2618{
2619 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2620 double now = nvtime ();
2621
2622 if (now >= self->next)
2623 {
2624 api_cede (aTHX);
2625 self->next = now + self->every;
2626 }
2627
2628 return PerlIOBuf_flush (aTHX_ f);
2629}
2630
2631static PerlIO_funcs PerlIO_cede =
2632{
2633 sizeof(PerlIO_funcs),
2634 "cede",
2635 sizeof(PerlIOCede),
2636 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2637 PerlIOCede_pushed,
2638 PerlIOBuf_popped,
2639 PerlIOBuf_open,
2640 PerlIOBase_binmode,
2641 PerlIOCede_getarg,
2642 PerlIOBase_fileno,
2643 PerlIOBuf_dup,
2644 PerlIOBuf_read,
2645 PerlIOBuf_unread,
2646 PerlIOBuf_write,
2647 PerlIOBuf_seek,
2648 PerlIOBuf_tell,
2649 PerlIOBuf_close,
2650 PerlIOCede_flush,
2651 PerlIOBuf_fill,
2652 PerlIOBase_eof,
2653 PerlIOBase_error,
2654 PerlIOBase_clearerr,
2655 PerlIOBase_setlinebuf,
2656 PerlIOBuf_get_base,
2657 PerlIOBuf_bufsiz,
2658 PerlIOBuf_get_ptr,
2659 PerlIOBuf_get_cnt,
2660 PerlIOBuf_set_ptrcnt,
2661};
2662
2663/*****************************************************************************/
2664/* Coro::Semaphore & Coro::Signal */
2665
2666static SV *
2667coro_waitarray_new (pTHX_ int count)
2668{
2669 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2670 AV *av = newAV ();
2671 SV **ary;
2672
2673 /* unfortunately, building manually saves memory */
2674 Newx (ary, 2, SV *);
2675 AvALLOC (av) = ary;
2676#if PERL_VERSION_ATLEAST (5,10,0)
2677 AvARRAY (av) = ary;
2678#else
2679 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2680 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2681 SvPVX ((SV *)av) = (char *)ary;
2682#endif
2683 AvMAX (av) = 1;
2684 AvFILLp (av) = 0;
2685 ary [0] = newSViv (count);
2686
2687 return newRV_noinc ((SV *)av);
2688}
2689
2690/* semaphore */
2691
2692static void
2693coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2694{
2695 SV *count_sv = AvARRAY (av)[0];
2696 IV count = SvIVX (count_sv);
2697
2698 count += adjust;
2699 SvIVX (count_sv) = count;
2700
2701 /* now wake up as many waiters as are expected to lock */
2702 while (count > 0 && AvFILLp (av) > 0)
2703 {
2704 SV *cb;
2705
2706 /* swap first two elements so we can shift a waiter */
2707 AvARRAY (av)[0] = AvARRAY (av)[1];
2708 AvARRAY (av)[1] = count_sv;
2709 cb = av_shift (av);
2710
2711 if (SvOBJECT (cb))
2712 {
2713 api_ready (aTHX_ cb);
2714 --count;
2715 }
2716 else if (SvTYPE (cb) == SVt_PVCV)
1102 { 2717 {
1103 dSP; 2718 dSP;
1104 UNLOCK;
1105
1106 ENTER;
1107 SAVETMPS;
1108
1109 PUSHMARK (SP); 2719 PUSHMARK (SP);
2720 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1110 PUTBACK; 2721 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2722 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1112
1113 FREETMPS;
1114 LEAVE;
1115 continue;
1116 } 2723 }
1117 2724
1118 ta->next = SvSTATE (next_sv); 2725 SvREFCNT_dec (cb);
2726 }
2727}
1119 2728
1120 /* cannot transfer to destroyed coros, skip and look for next */ 2729static void
1121 if (ta->next->flags & CF_DESTROYED) 2730coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2731{
2732 /* call $sem->adjust (0) to possibly wake up some other waiters */
2733 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2734}
2735
2736static int
2737slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2738{
2739 AV *av = (AV *)frame->data;
2740 SV *count_sv = AvARRAY (av)[0];
2741
2742 /* if we are about to throw, don't actually acquire the lock, just throw */
2743 if (CORO_THROW)
2744 return 0;
2745 else if (SvIVX (count_sv) > 0)
2746 {
2747 SvSTATE_current->on_destroy = 0;
2748
2749 if (acquire)
2750 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2751 else
2752 coro_semaphore_adjust (aTHX_ av, 0);
2753
2754 return 0;
2755 }
2756 else
2757 {
2758 int i;
2759 /* if we were woken up but can't down, we look through the whole */
2760 /* waiters list and only add us if we aren't in there already */
2761 /* this avoids some degenerate memory usage cases */
2762
2763 for (i = 1; i <= AvFILLp (av); ++i)
2764 if (AvARRAY (av)[i] == SvRV (coro_current))
2765 return 1;
2766
2767 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2768 return 1;
2769 }
2770}
2771
2772static int
2773slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2774{
2775 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2776}
2777
2778static int
2779slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2780{
2781 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2782}
2783
2784static void
2785slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2786{
2787 AV *av = (AV *)SvRV (arg [0]);
2788
2789 if (SvIVX (AvARRAY (av)[0]) > 0)
2790 {
2791 frame->data = (void *)av;
2792 frame->prepare = prepare_nop;
2793 }
2794 else
2795 {
2796 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2797
2798 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2799 frame->prepare = prepare_schedule;
2800
2801 /* to avoid race conditions when a woken-up coro gets terminated */
2802 /* we arrange for a temporary on_destroy that calls adjust (0) */
2803 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2804 }
2805}
2806
2807static void
2808slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2809{
2810 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2811 frame->check = slf_check_semaphore_down;
2812}
2813
2814static void
2815slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2816{
2817 if (items >= 2)
2818 {
2819 /* callback form */
2820 AV *av = (AV *)SvRV (arg [0]);
2821 SV *cb_cv = s_get_cv_croak (arg [1]);
2822
2823 av_push (av, SvREFCNT_inc_NN (cb_cv));
2824
2825 if (SvIVX (AvARRAY (av)[0]) > 0)
2826 coro_semaphore_adjust (aTHX_ av, 0);
2827
2828 frame->prepare = prepare_nop;
2829 frame->check = slf_check_nop;
2830 }
2831 else
2832 {
2833 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2834 frame->check = slf_check_semaphore_wait;
2835 }
2836}
2837
2838/* signal */
2839
2840static void
2841coro_signal_wake (pTHX_ AV *av, int count)
2842{
2843 SvIVX (AvARRAY (av)[0]) = 0;
2844
2845 /* now signal count waiters */
2846 while (count > 0 && AvFILLp (av) > 0)
2847 {
2848 SV *cb;
2849
2850 /* swap first two elements so we can shift a waiter */
2851 cb = AvARRAY (av)[0];
2852 AvARRAY (av)[0] = AvARRAY (av)[1];
2853 AvARRAY (av)[1] = cb;
2854
2855 cb = av_shift (av);
2856
2857 if (SvTYPE (cb) == SVt_PVCV)
1122 { 2858 {
2859 dSP;
2860 PUSHMARK (SP);
2861 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1123 UNLOCK; 2862 PUTBACK;
1124 SvREFCNT_dec (next_sv); 2863 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1125 /* coro_nready is already taken care of by destroy */
1126 continue;
1127 } 2864 }
2865 else
2866 {
2867 api_ready (aTHX_ cb);
2868 sv_setiv (cb, 0); /* signal waiter */
2869 }
1128 2870
1129 --coro_nready; 2871 SvREFCNT_dec (cb);
1130 UNLOCK;
1131 break;
1132 }
1133 2872
1134 /* free this only after the transfer */ 2873 --count;
1135 prev_sv = SvRV (coro_current); 2874 }
1136 SvRV_set (coro_current, next_sv);
1137 ta->prev = SvSTATE (prev_sv);
1138
1139 assert (ta->next->flags & CF_READY);
1140 ta->next->flags &= ~CF_READY;
1141
1142 LOCK;
1143 free_coro_mortal (aTHX);
1144 coro_mortal = prev_sv;
1145 UNLOCK;
1146}
1147
1148static void
1149prepare_cede (pTHX_ struct transfer_args *ta)
1150{
1151 api_ready (coro_current);
1152 prepare_schedule (aTHX_ ta);
1153} 2875}
1154 2876
1155static int 2877static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 2878slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1157{ 2879{
1158 if (coro_nready) 2880 /* if we are about to throw, also stop waiting */
2881 return SvROK ((SV *)frame->data) && !CORO_THROW;
2882}
2883
2884static void
2885slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2886{
2887 AV *av = (AV *)SvRV (arg [0]);
2888
2889 if (items >= 2)
2890 {
2891 SV *cb_cv = s_get_cv_croak (arg [1]);
2892 av_push (av, SvREFCNT_inc_NN (cb_cv));
2893
2894 if (SvIVX (AvARRAY (av)[0]))
2895 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2896
2897 frame->prepare = prepare_nop;
2898 frame->check = slf_check_nop;
1159 { 2899 }
1160 SV *prev = SvRV (coro_current); 2900 else if (SvIVX (AvARRAY (av)[0]))
1161 prepare_schedule (aTHX_ ta); 2901 {
1162 api_ready (prev); 2902 SvIVX (AvARRAY (av)[0]) = 0;
1163 return 1; 2903 frame->prepare = prepare_nop;
2904 frame->check = slf_check_nop;
1164 } 2905 }
1165 else 2906 else
2907 {
2908 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2909
2910 av_push (av, waiter);
2911
2912 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2913 frame->prepare = prepare_schedule;
2914 frame->check = slf_check_signal_wait;
2915 }
2916}
2917
2918/*****************************************************************************/
2919/* Coro::AIO */
2920
2921#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2922
2923/* helper storage struct */
2924struct io_state
2925{
2926 int errorno;
2927 I32 laststype; /* U16 in 5.10.0 */
2928 int laststatval;
2929 Stat_t statcache;
2930};
2931
2932static void
2933coro_aio_callback (pTHX_ CV *cv)
2934{
2935 dXSARGS;
2936 AV *state = (AV *)S_GENSUB_ARG;
2937 SV *coro = av_pop (state);
2938 SV *data_sv = newSV (sizeof (struct io_state));
2939
2940 av_extend (state, items - 1);
2941
2942 sv_upgrade (data_sv, SVt_PV);
2943 SvCUR_set (data_sv, sizeof (struct io_state));
2944 SvPOK_only (data_sv);
2945
2946 {
2947 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2948
2949 data->errorno = errno;
2950 data->laststype = PL_laststype;
2951 data->laststatval = PL_laststatval;
2952 data->statcache = PL_statcache;
2953 }
2954
2955 /* now build the result vector out of all the parameters and the data_sv */
2956 {
2957 int i;
2958
2959 for (i = 0; i < items; ++i)
2960 av_push (state, SvREFCNT_inc_NN (ST (i)));
2961 }
2962
2963 av_push (state, data_sv);
2964
2965 api_ready (aTHX_ coro);
2966 SvREFCNT_dec (coro);
2967 SvREFCNT_dec ((AV *)state);
2968}
2969
2970static int
2971slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2972{
2973 AV *state = (AV *)frame->data;
2974
2975 /* if we are about to throw, return early */
2976 /* this does not cancel the aio request, but at least */
2977 /* it quickly returns */
2978 if (CORO_THROW)
1166 return 0; 2979 return 0;
1167}
1168 2980
1169static void 2981 /* one element that is an RV? repeat! */
1170api_schedule (void) 2982 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1171{
1172 dTHX;
1173 struct transfer_args ta;
1174
1175 prepare_schedule (aTHX_ &ta);
1176 TRANSFER (ta);
1177}
1178
1179static int
1180api_cede (void)
1181{
1182 dTHX;
1183 struct transfer_args ta;
1184
1185 prepare_cede (aTHX_ &ta);
1186
1187 if (ta.prev != ta.next)
1188 {
1189 TRANSFER (ta);
1190 return 1; 2983 return 1;
2984
2985 /* restore status */
2986 {
2987 SV *data_sv = av_pop (state);
2988 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2989
2990 errno = data->errorno;
2991 PL_laststype = data->laststype;
2992 PL_laststatval = data->laststatval;
2993 PL_statcache = data->statcache;
2994
2995 SvREFCNT_dec (data_sv);
1191 } 2996 }
1192 else 2997
2998 /* push result values */
2999 {
3000 dSP;
3001 int i;
3002
3003 EXTEND (SP, AvFILLp (state) + 1);
3004 for (i = 0; i <= AvFILLp (state); ++i)
3005 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3006
3007 PUTBACK;
3008 }
3009
1193 return 0; 3010 return 0;
1194} 3011}
1195 3012
1196static int 3013static void
1197api_cede_notself (void) 3014slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1198{ 3015{
1199 dTHX; 3016 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1200 struct transfer_args ta; 3017 SV *coro_hv = SvRV (coro_current);
3018 struct coro *coro = SvSTATE_hv (coro_hv);
1201 3019
1202 if (prepare_cede_notself (aTHX_ &ta)) 3020 /* put our coroutine id on the state arg */
1203 { 3021 av_push (state, SvREFCNT_inc_NN (coro_hv));
1204 TRANSFER (ta); 3022
1205 return 1; 3023 /* first see whether we have a non-zero priority and set it as AIO prio */
3024 if (coro->prio)
1206 } 3025 {
1207 else 3026 dSP;
1208 return 0;
1209}
1210 3027
3028 static SV *prio_cv;
3029 static SV *prio_sv;
3030
3031 if (expect_false (!prio_cv))
3032 {
3033 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3034 prio_sv = newSViv (0);
3035 }
3036
3037 PUSHMARK (SP);
3038 sv_setiv (prio_sv, coro->prio);
3039 XPUSHs (prio_sv);
3040
3041 PUTBACK;
3042 call_sv (prio_cv, G_VOID | G_DISCARD);
3043 }
3044
3045 /* now call the original request */
3046 {
3047 dSP;
3048 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3049 int i;
3050
3051 PUSHMARK (SP);
3052
3053 /* first push all args to the stack */
3054 EXTEND (SP, items + 1);
3055
3056 for (i = 0; i < items; ++i)
3057 PUSHs (arg [i]);
3058
3059 /* now push the callback closure */
3060 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3061
3062 /* now call the AIO function - we assume our request is uncancelable */
3063 PUTBACK;
3064 call_sv ((SV *)req, G_VOID | G_DISCARD);
3065 }
3066
3067 /* now that the request is going, we loop till we have a result */
3068 frame->data = (void *)state;
3069 frame->prepare = prepare_schedule;
3070 frame->check = slf_check_aio_req;
3071}
3072
3073static void
3074coro_aio_req_xs (pTHX_ CV *cv)
3075{
3076 dXSARGS;
3077
3078 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3079
3080 XSRETURN_EMPTY;
3081}
3082
3083/*****************************************************************************/
3084
3085#if CORO_CLONE
3086# include "clone.c"
3087#endif
3088
3089/*****************************************************************************/
3090
3091static SV *
3092coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3093{
3094 SV *coro_sv;
3095 struct coro *coro;
3096 MAGIC *mg;
3097 HV *hv;
3098 SV *cb;
3099 int i;
3100
3101 if (argc > 0)
3102 {
3103 cb = s_get_cv_croak (argv [0]);
3104
3105 if (!is_coro)
3106 {
3107 if (CvISXSUB (cb))
3108 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3109
3110 if (!CvROOT (cb))
3111 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3112 }
3113 }
3114
3115 Newz (0, coro, 1, struct coro);
3116 coro->args = newAV ();
3117 coro->flags = CF_NEW;
3118
3119 if (coro_first) coro_first->prev = coro;
3120 coro->next = coro_first;
3121 coro_first = coro;
3122
3123 coro->hv = hv = newHV ();
3124 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3125 mg->mg_flags |= MGf_DUP;
3126 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3127
3128 if (argc > 0)
3129 {
3130 av_extend (coro->args, argc + is_coro - 1);
3131
3132 if (is_coro)
3133 {
3134 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3135 cb = (SV *)cv_coro_run;
3136 }
3137
3138 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3139
3140 for (i = 1; i < argc; i++)
3141 av_push (coro->args, newSVsv (argv [i]));
3142 }
3143
3144 return coro_sv;
3145}
3146
1211MODULE = Coro::State PACKAGE = Coro::State 3147MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 3148
1213PROTOTYPES: DISABLE 3149PROTOTYPES: DISABLE
1214 3150
1215BOOT: 3151BOOT:
1216{ 3152{
1217#ifdef USE_ITHREADS 3153#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 3154# if CORO_PTHREAD
3155 coro_thx = PERL_GET_CONTEXT;
3156# endif
1219#endif 3157#endif
1220 BOOT_PAGESIZE; 3158 BOOT_PAGESIZE;
1221 3159
3160 cctx_current = cctx_new_empty ();
3161
3162 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3163 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3164
3165 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3166 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3167 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3168
3169 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3170 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3171 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3172
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3173 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 3174
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3175 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3176 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1226 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1227 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1228 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1229 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3177 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3178 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 3179
1232 main_mainstack = PL_mainstack; 3180 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 3181 main_top_env = PL_top_env;
1234 3182
1235 while (main_top_env->je_prev) 3183 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 3184 main_top_env = main_top_env->je_prev;
1237 3185
3186 {
3187 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3188
3189 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3190 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3191
3192 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3193 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3194 }
3195
1238 coroapi.ver = CORO_API_VERSION; 3196 coroapi.ver = CORO_API_VERSION;
3197 coroapi.rev = CORO_API_REVISION;
3198
1239 coroapi.transfer = api_transfer; 3199 coroapi.transfer = api_transfer;
1240 3200
3201 coroapi.sv_state = SvSTATE_;
3202 coroapi.execute_slf = api_execute_slf;
3203 coroapi.prepare_nop = prepare_nop;
3204 coroapi.prepare_schedule = prepare_schedule;
3205 coroapi.prepare_cede = prepare_cede;
3206 coroapi.prepare_cede_notself = prepare_cede_notself;
3207
3208 time_init (aTHX);
3209
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3210 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1242} 3211}
1243 3212
1244SV * 3213SV *
1245new (char *klass, ...) 3214new (SV *klass, ...)
3215 ALIAS:
3216 Coro::new = 1
1246 CODE: 3217 CODE:
1247{ 3218 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1248 struct coro *coro;
1249 HV *hv;
1250 int i;
1251
1252 Newz (0, coro, 1, struct coro);
1253 coro->args = newAV ();
1254 coro->save = CORO_SAVE_DEF;
1255 coro->flags = CF_NEW;
1256
1257 if (coro_first) coro_first->prev = coro;
1258 coro->next = coro_first;
1259 coro_first = coro;
1260
1261 coro->hv = hv = newHV ();
1262 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1263 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264
1265 for (i = 1; i < items; i++)
1266 av_push (coro->args, newSVsv (ST (i)));
1267}
1268 OUTPUT:
1269 RETVAL
1270
1271int
1272save (SV *coro, int new_save = -1)
1273 CODE:
1274 RETVAL = api_save (coro, new_save);
1275 OUTPUT: 3219 OUTPUT:
1276 RETVAL 3220 RETVAL
1277 3221
1278int 3222void
1279save_also (SV *coro_sv, int save_also) 3223transfer (...)
3224 PROTOTYPE: $$
1280 CODE: 3225 CODE:
1281{ 3226 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1282 struct coro *coro = SvSTATE (coro_sv);
1283 RETVAL = coro->save;
1284 coro->save |= save_also;
1285}
1286 OUTPUT:
1287 RETVAL
1288 3227
1289void 3228void
1290_set_stacklevel (...)
1291 ALIAS:
1292 Coro::State::transfer = 1
1293 Coro::schedule = 2
1294 Coro::cede = 3
1295 Coro::cede_notself = 4
1296 CODE:
1297{
1298 struct transfer_args ta;
1299
1300 switch (ix)
1301 {
1302 case 0:
1303 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1304 ta.next = 0;
1305 break;
1306
1307 case 1:
1308 if (items != 2)
1309 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1310
1311 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1312 break;
1313
1314 case 2:
1315 prepare_schedule (aTHX_ &ta);
1316 break;
1317
1318 case 3:
1319 prepare_cede (aTHX_ &ta);
1320 break;
1321
1322 case 4:
1323 if (!prepare_cede_notself (aTHX_ &ta))
1324 XSRETURN_EMPTY;
1325
1326 break;
1327 }
1328
1329 BARRIER;
1330 TRANSFER (ta);
1331
1332 if (GIMME_V != G_VOID && ta.next != ta.prev)
1333 XSRETURN_YES;
1334}
1335
1336bool
1337_destroy (SV *coro_sv)
1338 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT:
1341 RETVAL
1342
1343void
1344_exit (code) 3229_exit (int code)
1345 int code
1346 PROTOTYPE: $ 3230 PROTOTYPE: $
1347 CODE: 3231 CODE:
1348 _exit (code); 3232 _exit (code);
1349 3233
3234SV *
3235clone (Coro::State coro)
3236 CODE:
3237{
3238#if CORO_CLONE
3239 struct coro *ncoro = coro_clone (aTHX_ coro);
3240 MAGIC *mg;
3241 /* TODO: too much duplication */
3242 ncoro->hv = newHV ();
3243 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3244 mg->mg_flags |= MGf_DUP;
3245 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3246#else
3247 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3248#endif
3249}
3250 OUTPUT:
3251 RETVAL
3252
1350int 3253int
1351cctx_stacksize (int new_stacksize = 0) 3254cctx_stacksize (int new_stacksize = 0)
3255 PROTOTYPE: ;$
1352 CODE: 3256 CODE:
1353 RETVAL = coro_stacksize; 3257 RETVAL = cctx_stacksize;
1354 if (new_stacksize) 3258 if (new_stacksize)
3259 {
1355 coro_stacksize = new_stacksize; 3260 cctx_stacksize = new_stacksize;
3261 ++cctx_gen;
3262 }
1356 OUTPUT: 3263 OUTPUT:
1357 RETVAL 3264 RETVAL
1358 3265
1359int 3266int
3267cctx_max_idle (int max_idle = 0)
3268 PROTOTYPE: ;$
3269 CODE:
3270 RETVAL = cctx_max_idle;
3271 if (max_idle > 1)
3272 cctx_max_idle = max_idle;
3273 OUTPUT:
3274 RETVAL
3275
3276int
1360cctx_count () 3277cctx_count ()
3278 PROTOTYPE:
1361 CODE: 3279 CODE:
1362 RETVAL = cctx_count; 3280 RETVAL = cctx_count;
1363 OUTPUT: 3281 OUTPUT:
1364 RETVAL 3282 RETVAL
1365 3283
1366int 3284int
1367cctx_idle () 3285cctx_idle ()
3286 PROTOTYPE:
1368 CODE: 3287 CODE:
1369 RETVAL = cctx_idle; 3288 RETVAL = cctx_idle;
1370 OUTPUT: 3289 OUTPUT:
1371 RETVAL 3290 RETVAL
1372 3291
1373void 3292void
1374list () 3293list ()
3294 PROTOTYPE:
1375 PPCODE: 3295 PPCODE:
1376{ 3296{
1377 struct coro *coro; 3297 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 3298 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 3299 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3300 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 3301}
1382 3302
1383void 3303void
1384_eval (Coro::State coro, SV *coderef) 3304call (Coro::State coro, SV *coderef)
3305 ALIAS:
3306 eval = 1
1385 CODE: 3307 CODE:
1386{ 3308{
1387 if (coro->mainstack) 3309 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1388 { 3310 {
1389 struct coro temp; 3311 struct coro *current = SvSTATE_current;
1390 Zero (&temp, 1, struct coro);
1391 temp.save = CORO_SAVE_ALL;
1392 3312
1393 if (!(coro->flags & CF_RUNNING)) 3313 if (current != coro)
1394 { 3314 {
3315 PUTBACK;
1395 save_perl (aTHX_ &temp); 3316 save_perl (aTHX_ current);
1396 load_perl (aTHX_ coro); 3317 load_perl (aTHX_ coro);
3318 SPAGAIN;
1397 } 3319 }
1398 3320
1399 { 3321 PUSHSTACK;
1400 dSP; 3322
1401 ENTER;
1402 SAVETMPS;
1403 PUSHMARK (SP); 3323 PUSHMARK (SP);
1404 PUTBACK; 3324 PUTBACK;
3325
3326 if (ix)
3327 eval_sv (coderef, 0);
3328 else
1405 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3329 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3330
3331 POPSTACK;
1406 SPAGAIN; 3332 SPAGAIN;
1407 FREETMPS;
1408 LEAVE;
1409 PUTBACK;
1410 }
1411 3333
1412 if (!(coro->flags & CF_RUNNING)) 3334 if (current != coro)
1413 { 3335 {
3336 PUTBACK;
1414 save_perl (aTHX_ coro); 3337 save_perl (aTHX_ coro);
1415 load_perl (aTHX_ &temp); 3338 load_perl (aTHX_ current);
3339 SPAGAIN;
1416 } 3340 }
1417 } 3341 }
1418} 3342}
1419 3343
1420SV * 3344SV *
1421is_ready (Coro::State coro) 3345is_ready (Coro::State coro)
1422 PROTOTYPE: $ 3346 PROTOTYPE: $
1423 ALIAS: 3347 ALIAS:
1424 is_ready = CF_READY 3348 is_ready = CF_READY
1425 is_running = CF_RUNNING 3349 is_running = CF_RUNNING
1426 is_new = CF_NEW 3350 is_new = CF_NEW
1427 is_destroyed = CF_DESTROYED 3351 is_destroyed = CF_DESTROYED
3352 is_suspended = CF_SUSPENDED
1428 CODE: 3353 CODE:
1429 RETVAL = boolSV (coro->flags & ix); 3354 RETVAL = boolSV (coro->flags & ix);
1430 OUTPUT: 3355 OUTPUT:
1431 RETVAL 3356 RETVAL
1432 3357
1433IV 3358void
3359throw (Coro::State self, SV *exception = &PL_sv_undef)
3360 PROTOTYPE: $;$
3361 CODE:
3362{
3363 struct coro *current = SvSTATE_current;
3364 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3365 SvREFCNT_dec (*exceptionp);
3366 SvGETMAGIC (exception);
3367 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3368}
3369
3370void
3371api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3372 PROTOTYPE: $;$
3373 C_ARGS: aTHX_ coro, flags
3374
3375SV *
3376has_cctx (Coro::State coro)
3377 PROTOTYPE: $
3378 CODE:
3379 /* maybe manage the running flag differently */
3380 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3381 OUTPUT:
3382 RETVAL
3383
3384int
3385is_traced (Coro::State coro)
3386 PROTOTYPE: $
3387 CODE:
3388 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3389 OUTPUT:
3390 RETVAL
3391
3392UV
1434rss (Coro::State coro) 3393rss (Coro::State coro)
1435 PROTOTYPE: $ 3394 PROTOTYPE: $
3395 ALIAS:
3396 usecount = 1
1436 CODE: 3397 CODE:
1437 RETVAL = coro_rss (coro); 3398 switch (ix)
3399 {
3400 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3401 case 1: RETVAL = coro->usecount; break;
3402 }
1438 OUTPUT: 3403 OUTPUT:
1439 RETVAL 3404 RETVAL
1440 3405
3406void
3407force_cctx ()
3408 PROTOTYPE:
3409 CODE:
3410 cctx_current->idle_sp = 0;
3411
3412void
3413swap_defsv (Coro::State self)
3414 PROTOTYPE: $
3415 ALIAS:
3416 swap_defav = 1
3417 CODE:
3418 if (!self->slot)
3419 croak ("cannot swap state with coroutine that has no saved state,");
3420 else
3421 {
3422 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3423 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3424
3425 SV *tmp = *src; *src = *dst; *dst = tmp;
3426 }
3427
3428void
3429cancel (Coro::State self)
3430 CODE:
3431 coro_state_destroy (aTHX_ self);
3432
3433SV *
3434enable_times (int enabled = enable_times)
3435 CODE:
3436{
3437 RETVAL = boolSV (enable_times);
3438
3439 if (enabled != enable_times)
3440 {
3441 enable_times = enabled;
3442
3443 coro_times_update ();
3444 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3445 }
3446}
3447 OUTPUT:
3448 RETVAL
3449
3450void
3451times (Coro::State self)
3452 PPCODE:
3453{
3454 struct coro *current = SvSTATE (coro_current);
3455
3456 if (expect_false (current == self))
3457 {
3458 coro_times_update ();
3459 coro_times_add (SvSTATE (coro_current));
3460 }
3461
3462 EXTEND (SP, 2);
3463 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3464 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3465
3466 if (expect_false (current == self))
3467 coro_times_sub (SvSTATE (coro_current));
3468}
3469
3470void
3471swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3472 CODE:
3473{
3474 struct coro *current = SvSTATE_current;
3475
3476 if (current == coro)
3477 SWAP_SVS (current);
3478
3479 if (!coro->swap_sv)
3480 coro->swap_sv = newAV ();
3481
3482 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3483 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3484
3485 if (current == coro)
3486 SWAP_SVS (current);
3487}
3488
1441 3489
1442MODULE = Coro::State PACKAGE = Coro 3490MODULE = Coro::State PACKAGE = Coro
1443 3491
1444BOOT: 3492BOOT:
1445{ 3493{
1446 int i;
1447
1448 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3494 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1449 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3495 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3496 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3497 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3498 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1450 av_async_pool = get_av ("Coro::async_pool", TRUE); 3499 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3500 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3501 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3502 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1451 3503
1452 coro_current = get_sv ("Coro::current", FALSE); 3504 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1453 SvREADONLY_on (coro_current); 3505 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1454 3506 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3507 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3508
1455 coro_stash = gv_stashpv ("Coro", TRUE); 3509 coro_stash = gv_stashpv ("Coro", TRUE);
1456 3510
1457 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3511 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1458 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3512 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1459 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3513 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1460 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3514 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1461 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3515 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1462 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3516 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1463
1464 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1465 coro_ready[i] = newAV ();
1466 3517
1467 { 3518 {
1468 SV *sv = perl_get_sv("Coro::API", 1); 3519 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1469 3520
1470 coroapi.schedule = api_schedule; 3521 coroapi.schedule = api_schedule;
1471 coroapi.save = api_save; 3522 coroapi.schedule_to = api_schedule_to;
1472 coroapi.cede = api_cede; 3523 coroapi.cede = api_cede;
1473 coroapi.cede_notself = api_cede_notself; 3524 coroapi.cede_notself = api_cede_notself;
1474 coroapi.ready = api_ready; 3525 coroapi.ready = api_ready;
1475 coroapi.is_ready = api_is_ready; 3526 coroapi.is_ready = api_is_ready;
1476 coroapi.nready = &coro_nready; 3527 coroapi.nready = coro_nready;
1477 coroapi.current = coro_current; 3528 coroapi.current = coro_current;
1478 3529
1479 GCoroAPI = &coroapi; 3530 /*GCoroAPI = &coroapi;*/
1480 sv_setiv (sv, (IV)&coroapi); 3531 sv_setiv (sv, (IV)&coroapi);
1481 SvREADONLY_on (sv); 3532 SvREADONLY_on (sv);
1482 } 3533 }
1483} 3534}
3535
3536SV *
3537async (...)
3538 PROTOTYPE: &@
3539 CODE:
3540 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3541 api_ready (aTHX_ RETVAL);
3542 OUTPUT:
3543 RETVAL
3544
3545void
3546_destroy (Coro::State coro)
3547 CODE:
3548 /* used by the manager thread */
3549 coro_state_destroy (aTHX_ coro);
3550 coro_call_on_destroy (aTHX_ coro);
3551
3552void
3553terminate (...)
3554 CODE:
3555 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3556
3557void
3558cancel (...)
3559 CODE:
3560 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3561
3562void
3563schedule (...)
3564 CODE:
3565 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3566
3567void
3568schedule_to (...)
3569 CODE:
3570 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3571
3572void
3573cede_to (...)
3574 CODE:
3575 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3576
3577void
3578cede (...)
3579 CODE:
3580 CORO_EXECUTE_SLF_XS (slf_init_cede);
3581
3582void
3583cede_notself (...)
3584 CODE:
3585 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1484 3586
1485void 3587void
1486_set_current (SV *current) 3588_set_current (SV *current)
1487 PROTOTYPE: $ 3589 PROTOTYPE: $
1488 CODE: 3590 CODE:
1489 SvREFCNT_dec (SvRV (coro_current)); 3591 SvREFCNT_dec (SvRV (coro_current));
1490 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3592 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3593
3594void
3595_set_readyhook (SV *hook)
3596 PROTOTYPE: $
3597 CODE:
3598 SvREFCNT_dec (coro_readyhook);
3599 SvGETMAGIC (hook);
3600 if (SvOK (hook))
3601 {
3602 coro_readyhook = newSVsv (hook);
3603 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3604 }
3605 else
3606 {
3607 coro_readyhook = 0;
3608 CORO_READYHOOK = 0;
3609 }
1491 3610
1492int 3611int
1493prio (Coro::State coro, int newprio = 0) 3612prio (Coro::State coro, int newprio = 0)
3613 PROTOTYPE: $;$
1494 ALIAS: 3614 ALIAS:
1495 nice = 1 3615 nice = 1
1496 CODE: 3616 CODE:
1497{ 3617{
1498 RETVAL = coro->prio; 3618 RETVAL = coro->prio;
… …
1500 if (items > 1) 3620 if (items > 1)
1501 { 3621 {
1502 if (ix) 3622 if (ix)
1503 newprio = coro->prio - newprio; 3623 newprio = coro->prio - newprio;
1504 3624
1505 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3625 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1506 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3626 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1507 3627
1508 coro->prio = newprio; 3628 coro->prio = newprio;
1509 } 3629 }
1510} 3630}
1511 OUTPUT: 3631 OUTPUT:
… …
1513 3633
1514SV * 3634SV *
1515ready (SV *self) 3635ready (SV *self)
1516 PROTOTYPE: $ 3636 PROTOTYPE: $
1517 CODE: 3637 CODE:
1518 RETVAL = boolSV (api_ready (self)); 3638 RETVAL = boolSV (api_ready (aTHX_ self));
1519 OUTPUT: 3639 OUTPUT:
1520 RETVAL 3640 RETVAL
1521 3641
1522int 3642int
1523nready (...) 3643nready (...)
… …
1525 CODE: 3645 CODE:
1526 RETVAL = coro_nready; 3646 RETVAL = coro_nready;
1527 OUTPUT: 3647 OUTPUT:
1528 RETVAL 3648 RETVAL
1529 3649
1530# for async_pool speedup 3650void
3651suspend (Coro::State self)
3652 PROTOTYPE: $
3653 CODE:
3654 self->flags |= CF_SUSPENDED;
3655
3656void
3657resume (Coro::State self)
3658 PROTOTYPE: $
3659 CODE:
3660 self->flags &= ~CF_SUSPENDED;
3661
3662void
3663_pool_handler (...)
3664 CODE:
3665 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3666
3667void
3668async_pool (SV *cv, ...)
3669 PROTOTYPE: &@
3670 PPCODE:
3671{
3672 HV *hv = (HV *)av_pop (av_async_pool);
3673 AV *av = newAV ();
3674 SV *cb = ST (0);
3675 int i;
3676
3677 av_extend (av, items - 2);
3678 for (i = 1; i < items; ++i)
3679 av_push (av, SvREFCNT_inc_NN (ST (i)));
3680
3681 if ((SV *)hv == &PL_sv_undef)
3682 {
3683 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3684 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3685 SvREFCNT_dec (sv);
3686 }
3687
3688 {
3689 struct coro *coro = SvSTATE_hv (hv);
3690
3691 assert (!coro->invoke_cb);
3692 assert (!coro->invoke_av);
3693 coro->invoke_cb = SvREFCNT_inc (cb);
3694 coro->invoke_av = av;
3695 }
3696
3697 api_ready (aTHX_ (SV *)hv);
3698
3699 if (GIMME_V != G_VOID)
3700 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3701 else
3702 SvREFCNT_dec (hv);
3703}
3704
1531SV * 3705SV *
1532_pool_1 (...) 3706rouse_cb ()
3707 PROTOTYPE:
1533 CODE: 3708 CODE:
1534{ 3709 RETVAL = coro_new_rouse_cb (aTHX);
1535 int i, len;
1536 HV *hv = (HV *)SvRV (coro_current);
1537 AV *defav = GvAV (PL_defgv);
1538 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1539 AV *invoke_av;
1540
1541 if (!invoke)
1542 XSRETURN_EMPTY;
1543
1544 hv_store (hv, "desc", sizeof ("desc") - 1,
1545 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1546
1547 invoke_av = (AV *)SvRV (invoke);
1548 len = av_len (invoke_av);
1549
1550 RETVAL = SvREFCNT_inc (AvARRAY (invoke_av)[0]);
1551
1552 if (len > 0)
1553 {
1554 av_clear (defav);
1555 av_extend (defav, len);
1556 for (i = 0; i < len; ++i)
1557 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1558 }
1559
1560 SvREFCNT_dec (invoke);
1561}
1562 OUTPUT: 3710 OUTPUT:
1563 RETVAL 3711 RETVAL
1564 3712
1565void 3713void
1566_pool_2 (...) 3714rouse_wait (...)
3715 PROTOTYPE: ;$
3716 PPCODE:
3717 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3718
3719void
3720on_enter (SV *block)
3721 ALIAS:
3722 on_leave = 1
3723 PROTOTYPE: &
1567 CODE: 3724 CODE:
1568{ 3725{
1569 struct coro *coro = SvSTATE (coro_current); 3726 struct coro *coro = SvSTATE_current;
3727 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1570 3728
1571 if (coro_rss (coro) > SvIV (sv_pool_rss) 3729 block = s_get_cv_croak (block);
1572 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1573 XSRETURN_YES;
1574 3730
1575 av_clear (GvAV (PL_defgv)); 3731 if (!*avp)
1576 hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1, 3732 *avp = newAV ();
1577 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1578 coro->save = CORO_SAVE_DEF;
1579 coro->prio = 0;
1580 av_push (av_async_pool, newSVsv (coro_current));
1581 3733
1582 XSRETURN_NO; 3734 av_push (*avp, SvREFCNT_inc (block));
1583}
1584 3735
3736 if (!ix)
3737 on_enterleave_call (aTHX_ block);
1585 3738
3739 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3740 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3741 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3742}
3743
3744
3745MODULE = Coro::State PACKAGE = PerlIO::cede
3746
3747BOOT:
3748 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3749
3750
1586MODULE = Coro::State PACKAGE = Coro::AIO 3751MODULE = Coro::State PACKAGE = Coro::Semaphore
1587 3752
1588SV * 3753SV *
1589_get_state () 3754new (SV *klass, SV *count = 0)
1590 CODE: 3755 CODE:
1591{ 3756{
1592 struct io_state *data; 3757 int semcnt = 1;
1593 3758
1594 RETVAL = newSV (sizeof (struct io_state)); 3759 if (count)
1595 data = (struct io_state *)SvPVX (RETVAL); 3760 {
1596 SvCUR_set (RETVAL, sizeof (struct io_state)); 3761 SvGETMAGIC (count);
1597 SvPOK_only (RETVAL);
1598 3762
1599 data->errorno = errno; 3763 if (SvOK (count))
1600 data->laststype = PL_laststype; 3764 semcnt = SvIV (count);
1601 data->laststatval = PL_laststatval; 3765 }
1602 data->statcache = PL_statcache; 3766
3767 RETVAL = sv_bless (
3768 coro_waitarray_new (aTHX_ semcnt),
3769 GvSTASH (CvGV (cv))
3770 );
1603} 3771}
1604 OUTPUT: 3772 OUTPUT:
1605 RETVAL 3773 RETVAL
1606 3774
3775# helper for Coro::Channel and others
3776SV *
3777_alloc (int count)
3778 CODE:
3779 RETVAL = coro_waitarray_new (aTHX_ count);
3780 OUTPUT:
3781 RETVAL
3782
3783SV *
3784count (SV *self)
3785 CODE:
3786 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3787 OUTPUT:
3788 RETVAL
3789
1607void 3790void
1608_set_state (char *data_) 3791up (SV *self, int adjust = 1)
1609 PROTOTYPE: $ 3792 ALIAS:
3793 adjust = 1
3794 CODE:
3795 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3796
3797void
3798down (...)
3799 CODE:
3800 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3801
3802void
3803wait (...)
3804 CODE:
3805 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3806
3807void
3808try (SV *self)
3809 PPCODE:
3810{
3811 AV *av = (AV *)SvRV (self);
3812 SV *count_sv = AvARRAY (av)[0];
3813 IV count = SvIVX (count_sv);
3814
3815 if (count > 0)
3816 {
3817 --count;
3818 SvIVX (count_sv) = count;
3819 XSRETURN_YES;
3820 }
3821 else
3822 XSRETURN_NO;
3823}
3824
3825void
3826waiters (SV *self)
3827 PPCODE:
3828{
3829 AV *av = (AV *)SvRV (self);
3830 int wcount = AvFILLp (av) + 1 - 1;
3831
3832 if (GIMME_V == G_SCALAR)
3833 XPUSHs (sv_2mortal (newSViv (wcount)));
3834 else
3835 {
3836 int i;
3837 EXTEND (SP, wcount);
3838 for (i = 1; i <= wcount; ++i)
3839 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3840 }
3841}
3842
3843MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3844
3845void
3846_may_delete (SV *sem, int count, int extra_refs)
3847 PPCODE:
3848{
3849 AV *av = (AV *)SvRV (sem);
3850
3851 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3852 && AvFILLp (av) == 0 /* no waiters, just count */
3853 && SvIV (AvARRAY (av)[0]) == count)
3854 XSRETURN_YES;
3855
3856 XSRETURN_NO;
3857}
3858
3859MODULE = Coro::State PACKAGE = Coro::Signal
3860
3861SV *
3862new (SV *klass)
1610 CODE: 3863 CODE:
1611{ 3864 RETVAL = sv_bless (
1612 struct io_state *data = (void *)data_; 3865 coro_waitarray_new (aTHX_ 0),
3866 GvSTASH (CvGV (cv))
3867 );
3868 OUTPUT:
3869 RETVAL
1613 3870
1614 errno = data->errorno; 3871void
1615 PL_laststype = data->laststype; 3872wait (...)
1616 PL_laststatval = data->laststatval; 3873 CODE:
1617 PL_statcache = data->statcache; 3874 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
1618}
1619 3875
3876void
3877broadcast (SV *self)
3878 CODE:
3879{
3880 AV *av = (AV *)SvRV (self);
3881 coro_signal_wake (aTHX_ av, AvFILLp (av));
3882}
3883
3884void
3885send (SV *self)
3886 CODE:
3887{
3888 AV *av = (AV *)SvRV (self);
3889
3890 if (AvFILLp (av))
3891 coro_signal_wake (aTHX_ av, 1);
3892 else
3893 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3894}
3895
3896IV
3897awaited (SV *self)
3898 CODE:
3899 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3900 OUTPUT:
3901 RETVAL
3902
3903
3904MODULE = Coro::State PACKAGE = Coro::AnyEvent
3905
3906BOOT:
3907 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3908
3909void
3910_schedule (...)
3911 CODE:
3912{
3913 static int incede;
3914
3915 api_cede_notself (aTHX);
3916
3917 ++incede;
3918 while (coro_nready >= incede && api_cede (aTHX))
3919 ;
3920
3921 sv_setsv (sv_activity, &PL_sv_undef);
3922 if (coro_nready >= incede)
3923 {
3924 PUSHMARK (SP);
3925 PUTBACK;
3926 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3927 }
3928
3929 --incede;
3930}
3931
3932
3933MODULE = Coro::State PACKAGE = Coro::AIO
3934
3935void
3936_register (char *target, char *proto, SV *req)
3937 CODE:
3938{
3939 SV *req_cv = s_get_cv_croak (req);
3940 /* newXSproto doesn't return the CV on 5.8 */
3941 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3942 sv_setpv ((SV *)slf_cv, proto);
3943 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3944}
3945
3946MODULE = Coro::State PACKAGE = Coro::Select
3947
3948void
3949patch_pp_sselect ()
3950 CODE:
3951 if (!coro_old_pp_sselect)
3952 {
3953 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3954 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3955 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3956 }
3957
3958void
3959unpatch_pp_sselect ()
3960 CODE:
3961 if (coro_old_pp_sselect)
3962 {
3963 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3964 coro_old_pp_sselect = 0;
3965 }
3966

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