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Comparing Coro/Coro/State.xs (file contents):
Revision 1.159 by root, Sat Sep 22 14:42:56 2007 UTC vs.
Revision 1.388 by root, Wed Feb 23 07:14:22 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#ifdef 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.");
362 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
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 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2014
2015 if (on_destroyp)
2016 {
2017 AV *on_destroy = (AV *)SvRV (*on_destroyp);
2018
2019 while (AvFILLp (on_destroy) >= 0)
2020 {
2021 dSP; /* don't disturb outer sp */
2022 SV *cb = av_pop (on_destroy);
2023
2024 PUSHMARK (SP);
2025
2026 if (statusp)
2027 {
2028 int i;
2029 AV *status = (AV *)SvRV (*statusp);
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
2043slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2044{
2045 int i;
2046 HV *hv = (HV *)SvRV (coro_current);
2047 AV *av = newAV ();
2048
2049 /* items are actually not so common, so optimise for this case */
2050 if (items)
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 (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2059
2060 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2061 api_ready (aTHX_ sv_manager);
2062
2063 frame->prepare = prepare_schedule;
2064 frame->check = slf_check_repeat;
2065
2066 /* as a minor optimisation, we could unwind all stacks here */
2067 /* but that puts extra pressure on pp_slf, and is not worth much */
2068 /*coro_unwind_stacks (aTHX);*/
2069}
2070
2071/*****************************************************************************/
2072/* async pool handler */
2073
2074static int
2075slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2076{
2077 HV *hv = (HV *)SvRV (coro_current);
2078 struct coro *coro = (struct coro *)frame->data;
2079
2080 if (!coro->invoke_cb)
2081 return 1; /* loop till we have invoke */
2082 else
2083 {
2084 hv_store (hv, "desc", sizeof ("desc") - 1,
2085 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2086
2087 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2088
2089 {
2090 dSP;
2091 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2092 PUTBACK;
2093 }
2094
2095 SvREFCNT_dec (GvAV (PL_defgv));
2096 GvAV (PL_defgv) = coro->invoke_av;
2097 coro->invoke_av = 0;
2098
2099 return 0;
2100 }
2101}
2102
2103static void
2104slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2105{
2106 HV *hv = (HV *)SvRV (coro_current);
2107 struct coro *coro = SvSTATE_hv ((SV *)hv);
2108
2109 if (expect_true (coro->saved_deffh))
2110 {
2111 /* subsequent iteration */
2112 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2113 coro->saved_deffh = 0;
2114
2115 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2116 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2117 {
2118 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2119 coro->invoke_av = newAV ();
2120
2121 frame->prepare = prepare_nop;
2122 }
2123 else
2124 {
2125 av_clear (GvAV (PL_defgv));
2126 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2127
2128 coro->prio = 0;
2129
2130 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2131 api_trace (aTHX_ coro_current, 0);
2132
2133 frame->prepare = prepare_schedule;
2134 av_push (av_async_pool, SvREFCNT_inc (hv));
2135 }
2136 }
2137 else
2138 {
2139 /* first iteration, simply fall through */
2140 frame->prepare = prepare_nop;
2141 }
2142
2143 frame->check = slf_check_pool_handler;
2144 frame->data = (void *)coro;
2145}
2146
2147/*****************************************************************************/
2148/* rouse callback */
2149
2150#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2151
2152static void
2153coro_rouse_callback (pTHX_ CV *cv)
2154{
2155 dXSARGS;
2156 SV *data = (SV *)S_GENSUB_ARG;
2157
2158 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2159 {
2160 /* first call, set args */
2161 SV *coro = SvRV (data);
2162 AV *av = newAV ();
2163
2164 SvRV_set (data, (SV *)av);
2165
2166 /* better take a full copy of the arguments */
2167 while (items--)
2168 av_store (av, items, newSVsv (ST (items)));
2169
2170 api_ready (aTHX_ coro);
2171 SvREFCNT_dec (coro);
2172 }
2173
2174 XSRETURN_EMPTY;
2175}
2176
2177static int
2178slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2179{
2180 SV *data = (SV *)frame->data;
2181
2182 if (CORO_THROW)
2183 return 0;
2184
2185 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2186 return 1;
2187
2188 /* now push all results on the stack */
2189 {
2190 dSP;
2191 AV *av = (AV *)SvRV (data);
2192 int i;
2193
2194 EXTEND (SP, AvFILLp (av) + 1);
2195 for (i = 0; i <= AvFILLp (av); ++i)
2196 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2197
2198 /* we have stolen the elements, so set length to zero and free */
2199 AvFILLp (av) = -1;
2200 av_undef (av);
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 SV *cb;
2212
2213 if (items)
2214 cb = arg [0];
2215 else
2216 {
2217 struct coro *coro = SvSTATE_current;
2218
2219 if (!coro->rouse_cb)
2220 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2221
2222 cb = sv_2mortal (coro->rouse_cb);
2223 coro->rouse_cb = 0;
2224 }
2225
2226 if (!SvROK (cb)
2227 || SvTYPE (SvRV (cb)) != SVt_PVCV
2228 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2229 croak ("Coro::rouse_wait called with illegal callback argument,");
2230
2231 {
2232 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2233 SV *data = (SV *)S_GENSUB_ARG;
2234
2235 frame->data = (void *)data;
2236 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2237 frame->check = slf_check_rouse_wait;
2238 }
2239}
2240
2241static SV *
2242coro_new_rouse_cb (pTHX)
2243{
2244 HV *hv = (HV *)SvRV (coro_current);
2245 struct coro *coro = SvSTATE_hv (hv);
2246 SV *data = newRV_inc ((SV *)hv);
2247 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2248
2249 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2250 SvREFCNT_dec (data); /* magicext increases the refcount */
2251
2252 SvREFCNT_dec (coro->rouse_cb);
2253 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2254
2255 return cb;
2256}
2257
2258/*****************************************************************************/
2259/* schedule-like-function opcode (SLF) */
2260
2261static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2262static const CV *slf_cv;
2263static SV **slf_argv;
2264static int slf_argc, slf_arga; /* count, allocated */
2265static I32 slf_ax; /* top of stack, for restore */
2266
2267/* this restores the stack in the case we patched the entersub, to */
2268/* recreate the stack frame as perl will on following calls */
2269/* since entersub cleared the stack */
2270static OP *
2271pp_restore (pTHX)
2272{
2273 int i;
2274 SV **SP = PL_stack_base + slf_ax;
2275
2276 PUSHMARK (SP);
2277
2278 EXTEND (SP, slf_argc + 1);
2279
2280 for (i = 0; i < slf_argc; ++i)
2281 PUSHs (sv_2mortal (slf_argv [i]));
2282
2283 PUSHs ((SV *)CvGV (slf_cv));
2284
2285 RETURNOP (slf_restore.op_first);
2286}
2287
2288static void
2289slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2290{
2291 SV **arg = (SV **)slf_frame.data;
2292
2293 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2294}
2295
2296static void
2297slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 if (items != 2)
2300 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2301
2302 frame->prepare = slf_prepare_transfer;
2303 frame->check = slf_check_nop;
2304 frame->data = (void *)arg; /* let's hope it will stay valid */
2305}
2306
2307static void
2308slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2309{
2310 frame->prepare = prepare_schedule;
2311 frame->check = slf_check_nop;
2312}
2313
2314static void
2315slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2316{
2317 struct coro *next = (struct coro *)slf_frame.data;
2318
2319 SvREFCNT_inc_NN (next->hv);
2320 prepare_schedule_to (aTHX_ ta, next);
2321}
2322
2323static void
2324slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 if (!items)
2327 croak ("Coro::schedule_to expects a coroutine argument, caught");
2328
2329 frame->data = (void *)SvSTATE (arg [0]);
2330 frame->prepare = slf_prepare_schedule_to;
2331 frame->check = slf_check_nop;
2332}
2333
2334static void
2335slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2336{
2337 api_ready (aTHX_ SvRV (coro_current));
2338
2339 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2340}
2341
2342static void
2343slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2344{
2345 frame->prepare = prepare_cede;
2346 frame->check = slf_check_nop;
2347}
2348
2349static void
2350slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 frame->prepare = prepare_cede_notself;
2353 frame->check = slf_check_nop;
2354}
2355
2356/*
2357 * these not obviously related functions are all rolled into one
2358 * function to increase chances that they all will call transfer with the same
2359 * stack offset
2360 * SLF stands for "schedule-like-function".
2361 */
2362static OP *
2363pp_slf (pTHX)
2364{
2365 I32 checkmark; /* mark SP to see how many elements check has pushed */
2366
2367 /* set up the slf frame, unless it has already been set-up */
2368 /* the latter happens when a new coro has been started */
2369 /* or when a new cctx was attached to an existing coroutine */
2370 if (expect_true (!slf_frame.prepare))
2371 {
2372 /* first iteration */
2373 dSP;
2374 SV **arg = PL_stack_base + TOPMARK + 1;
2375 int items = SP - arg; /* args without function object */
2376 SV *gv = *sp;
2377
2378 /* do a quick consistency check on the "function" object, and if it isn't */
2379 /* for us, divert to the real entersub */
2380 if (SvTYPE (gv) != SVt_PVGV
2381 || !GvCV (gv)
2382 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2383 return PL_ppaddr[OP_ENTERSUB](aTHX);
2384
2385 if (!(PL_op->op_flags & OPf_STACKED))
2386 {
2387 /* ampersand-form of call, use @_ instead of stack */
2388 AV *av = GvAV (PL_defgv);
2389 arg = AvARRAY (av);
2390 items = AvFILLp (av) + 1;
2391 }
2392
2393 /* now call the init function, which needs to set up slf_frame */
2394 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2395 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2396
2397 /* pop args */
2398 SP = PL_stack_base + POPMARK;
2399
2400 PUTBACK;
2401 }
2402
2403 /* now that we have a slf_frame, interpret it! */
2404 /* we use a callback system not to make the code needlessly */
2405 /* complicated, but so we can run multiple perl coros from one cctx */
2406
2407 do
2408 {
2409 struct coro_transfer_args ta;
2410
2411 slf_frame.prepare (aTHX_ &ta);
2412 TRANSFER (ta, 0);
2413
2414 checkmark = PL_stack_sp - PL_stack_base;
2415 }
2416 while (slf_frame.check (aTHX_ &slf_frame));
2417
2418 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2419
2420 /* exception handling */
2421 if (expect_false (CORO_THROW))
2422 {
2423 SV *exception = sv_2mortal (CORO_THROW);
2424
2425 CORO_THROW = 0;
2426 sv_setsv (ERRSV, exception);
2427 croak (0);
2428 }
2429
2430 /* return value handling - mostly like entersub */
2431 /* make sure we put something on the stack in scalar context */
2432 if (GIMME_V == G_SCALAR)
2433 {
2434 dSP;
2435 SV **bot = PL_stack_base + checkmark;
2436
2437 if (sp == bot) /* too few, push undef */
2438 bot [1] = &PL_sv_undef;
2439 else if (sp != bot + 1) /* too many, take last one */
2440 bot [1] = *sp;
2441
2442 SP = bot + 1;
2443
2444 PUTBACK;
2445 }
2446
2447 return NORMAL;
2448}
2449
2450static void
2451api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2452{
2453 int i;
2454 SV **arg = PL_stack_base + ax;
2455 int items = PL_stack_sp - arg + 1;
2456
2457 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2458
2459 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2460 && PL_op->op_ppaddr != pp_slf)
2461 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2462
2463 CvFLAGS (cv) |= CVf_SLF;
2464 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2465 slf_cv = cv;
2466
2467 /* we patch the op, and then re-run the whole call */
2468 /* we have to put the same argument on the stack for this to work */
2469 /* and this will be done by pp_restore */
2470 slf_restore.op_next = (OP *)&slf_restore;
2471 slf_restore.op_type = OP_CUSTOM;
2472 slf_restore.op_ppaddr = pp_restore;
2473 slf_restore.op_first = PL_op;
2474
2475 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2476
2477 if (PL_op->op_flags & OPf_STACKED)
2478 {
2479 if (items > slf_arga)
2480 {
2481 slf_arga = items;
2482 Safefree (slf_argv);
2483 New (0, slf_argv, slf_arga, SV *);
2484 }
2485
2486 slf_argc = items;
2487
2488 for (i = 0; i < items; ++i)
2489 slf_argv [i] = SvREFCNT_inc (arg [i]);
2490 }
2491 else
2492 slf_argc = 0;
2493
2494 PL_op->op_ppaddr = pp_slf;
2495 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2496
2497 PL_op = (OP *)&slf_restore;
2498}
2499
2500/*****************************************************************************/
2501/* dynamic wind */
2502
2503static void
2504on_enterleave_call (pTHX_ SV *cb)
2505{
2506 dSP;
2507
2508 PUSHSTACK;
2509
2510 PUSHMARK (SP);
2511 PUTBACK;
2512 call_sv (cb, G_VOID | G_DISCARD);
2513 SPAGAIN;
2514
2515 POPSTACK;
2516}
2517
2518static SV *
2519coro_avp_pop_and_free (pTHX_ AV **avp)
2520{
2521 AV *av = *avp;
2522 SV *res = av_pop (av);
2523
2524 if (AvFILLp (av) < 0)
2525 {
2526 *avp = 0;
2527 SvREFCNT_dec (av);
2528 }
2529
2530 return res;
2531}
2532
2533static void
2534coro_pop_on_enter (pTHX_ void *coro)
2535{
2536 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2537 SvREFCNT_dec (cb);
2538}
2539
2540static void
2541coro_pop_on_leave (pTHX_ void *coro)
2542{
2543 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2544 on_enterleave_call (aTHX_ sv_2mortal (cb));
2545}
2546
2547/*****************************************************************************/
2548/* PerlIO::cede */
2549
2550typedef struct
2551{
2552 PerlIOBuf base;
2553 NV next, every;
2554} PerlIOCede;
2555
2556static IV
2557PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2558{
2559 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2560
2561 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2562 self->next = nvtime () + self->every;
2563
2564 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2565}
2566
2567static SV *
2568PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2569{
2570 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2571
2572 return newSVnv (self->every);
2573}
2574
2575static IV
2576PerlIOCede_flush (pTHX_ PerlIO *f)
2577{
2578 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2579 double now = nvtime ();
2580
2581 if (now >= self->next)
2582 {
2583 api_cede (aTHX);
2584 self->next = now + self->every;
2585 }
2586
2587 return PerlIOBuf_flush (aTHX_ f);
2588}
2589
2590static PerlIO_funcs PerlIO_cede =
2591{
2592 sizeof(PerlIO_funcs),
2593 "cede",
2594 sizeof(PerlIOCede),
2595 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2596 PerlIOCede_pushed,
2597 PerlIOBuf_popped,
2598 PerlIOBuf_open,
2599 PerlIOBase_binmode,
2600 PerlIOCede_getarg,
2601 PerlIOBase_fileno,
2602 PerlIOBuf_dup,
2603 PerlIOBuf_read,
2604 PerlIOBuf_unread,
2605 PerlIOBuf_write,
2606 PerlIOBuf_seek,
2607 PerlIOBuf_tell,
2608 PerlIOBuf_close,
2609 PerlIOCede_flush,
2610 PerlIOBuf_fill,
2611 PerlIOBase_eof,
2612 PerlIOBase_error,
2613 PerlIOBase_clearerr,
2614 PerlIOBase_setlinebuf,
2615 PerlIOBuf_get_base,
2616 PerlIOBuf_bufsiz,
2617 PerlIOBuf_get_ptr,
2618 PerlIOBuf_get_cnt,
2619 PerlIOBuf_set_ptrcnt,
2620};
2621
2622/*****************************************************************************/
2623/* Coro::Semaphore & Coro::Signal */
2624
2625static SV *
2626coro_waitarray_new (pTHX_ int count)
2627{
2628 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2629 AV *av = newAV ();
2630 SV **ary;
2631
2632 /* unfortunately, building manually saves memory */
2633 Newx (ary, 2, SV *);
2634 AvALLOC (av) = ary;
2635#if PERL_VERSION_ATLEAST (5,10,0)
2636 AvARRAY (av) = ary;
2637#else
2638 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2639 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2640 SvPVX ((SV *)av) = (char *)ary;
2641#endif
2642 AvMAX (av) = 1;
2643 AvFILLp (av) = 0;
2644 ary [0] = newSViv (count);
2645
2646 return newRV_noinc ((SV *)av);
2647}
2648
2649/* semaphore */
2650
2651static void
2652coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2653{
2654 SV *count_sv = AvARRAY (av)[0];
2655 IV count = SvIVX (count_sv);
2656
2657 count += adjust;
2658 SvIVX (count_sv) = count;
2659
2660 /* now wake up as many waiters as are expected to lock */
2661 while (count > 0 && AvFILLp (av) > 0)
2662 {
2663 SV *cb;
2664
2665 /* swap first two elements so we can shift a waiter */
2666 AvARRAY (av)[0] = AvARRAY (av)[1];
2667 AvARRAY (av)[1] = count_sv;
2668 cb = av_shift (av);
2669
2670 if (SvOBJECT (cb))
2671 {
2672 api_ready (aTHX_ cb);
2673 --count;
2674 }
2675 else if (SvTYPE (cb) == SVt_PVCV)
1102 { 2676 {
1103 dSP; 2677 dSP;
1104 UNLOCK;
1105
1106 ENTER;
1107 SAVETMPS;
1108
1109 PUSHMARK (SP); 2678 PUSHMARK (SP);
2679 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1110 PUTBACK; 2680 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2681 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1112
1113 FREETMPS;
1114 LEAVE;
1115 continue;
1116 } 2682 }
1117 2683
1118 ta->next = SvSTATE (next_sv); 2684 SvREFCNT_dec (cb);
2685 }
2686}
1119 2687
1120 /* cannot transfer to destroyed coros, skip and look for next */ 2688static void
1121 if (ta->next->flags & CF_DESTROYED) 2689coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2690{
2691 /* call $sem->adjust (0) to possibly wake up some other waiters */
2692 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2693}
2694
2695static int
2696slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2697{
2698 AV *av = (AV *)frame->data;
2699 SV *count_sv = AvARRAY (av)[0];
2700
2701 /* if we are about to throw, don't actually acquire the lock, just throw */
2702 if (CORO_THROW)
2703 return 0;
2704 else if (SvIVX (count_sv) > 0)
2705 {
2706 SvSTATE_current->on_destroy = 0;
2707
2708 if (acquire)
2709 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2710 else
2711 coro_semaphore_adjust (aTHX_ av, 0);
2712
2713 return 0;
2714 }
2715 else
2716 {
2717 int i;
2718 /* if we were woken up but can't down, we look through the whole */
2719 /* waiters list and only add us if we aren't in there already */
2720 /* this avoids some degenerate memory usage cases */
2721
2722 for (i = 1; i <= AvFILLp (av); ++i)
2723 if (AvARRAY (av)[i] == SvRV (coro_current))
2724 return 1;
2725
2726 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2727 return 1;
2728 }
2729}
2730
2731static int
2732slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2733{
2734 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2735}
2736
2737static int
2738slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2739{
2740 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2741}
2742
2743static void
2744slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2745{
2746 AV *av = (AV *)SvRV (arg [0]);
2747
2748 if (SvIVX (AvARRAY (av)[0]) > 0)
2749 {
2750 frame->data = (void *)av;
2751 frame->prepare = prepare_nop;
2752 }
2753 else
2754 {
2755 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2756
2757 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2758 frame->prepare = prepare_schedule;
2759
2760 /* to avoid race conditions when a woken-up coro gets terminated */
2761 /* we arrange for a temporary on_destroy that calls adjust (0) */
2762 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2763 }
2764}
2765
2766static void
2767slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2768{
2769 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2770 frame->check = slf_check_semaphore_down;
2771}
2772
2773static void
2774slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2775{
2776 if (items >= 2)
2777 {
2778 /* callback form */
2779 AV *av = (AV *)SvRV (arg [0]);
2780 SV *cb_cv = s_get_cv_croak (arg [1]);
2781
2782 av_push (av, SvREFCNT_inc_NN (cb_cv));
2783
2784 if (SvIVX (AvARRAY (av)[0]) > 0)
2785 coro_semaphore_adjust (aTHX_ av, 0);
2786
2787 frame->prepare = prepare_nop;
2788 frame->check = slf_check_nop;
2789 }
2790 else
2791 {
2792 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2793 frame->check = slf_check_semaphore_wait;
2794 }
2795}
2796
2797/* signal */
2798
2799static void
2800coro_signal_wake (pTHX_ AV *av, int count)
2801{
2802 SvIVX (AvARRAY (av)[0]) = 0;
2803
2804 /* now signal count waiters */
2805 while (count > 0 && AvFILLp (av) > 0)
2806 {
2807 SV *cb;
2808
2809 /* swap first two elements so we can shift a waiter */
2810 cb = AvARRAY (av)[0];
2811 AvARRAY (av)[0] = AvARRAY (av)[1];
2812 AvARRAY (av)[1] = cb;
2813
2814 cb = av_shift (av);
2815
2816 if (SvTYPE (cb) == SVt_PVCV)
1122 { 2817 {
2818 dSP;
2819 PUSHMARK (SP);
2820 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1123 UNLOCK; 2821 PUTBACK;
1124 SvREFCNT_dec (next_sv); 2822 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1125 /* coro_nready is already taken care of by destroy */
1126 continue;
1127 } 2823 }
2824 else
2825 {
2826 api_ready (aTHX_ cb);
2827 sv_setiv (cb, 0); /* signal waiter */
2828 }
1128 2829
1129 --coro_nready; 2830 SvREFCNT_dec (cb);
1130 UNLOCK;
1131 break;
1132 }
1133 2831
1134 /* free this only after the transfer */ 2832 --count;
1135 prev_sv = SvRV (coro_current); 2833 }
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} 2834}
1154 2835
1155static int 2836static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 2837slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1157{ 2838{
1158 if (coro_nready) 2839 /* if we are about to throw, also stop waiting */
2840 return SvROK ((SV *)frame->data) && !CORO_THROW;
2841}
2842
2843static void
2844slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2845{
2846 AV *av = (AV *)SvRV (arg [0]);
2847
2848 if (items >= 2)
2849 {
2850 SV *cb_cv = s_get_cv_croak (arg [1]);
2851 av_push (av, SvREFCNT_inc_NN (cb_cv));
2852
2853 if (SvIVX (AvARRAY (av)[0]))
2854 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2855
2856 frame->prepare = prepare_nop;
2857 frame->check = slf_check_nop;
1159 { 2858 }
1160 SV *prev = SvRV (coro_current); 2859 else if (SvIVX (AvARRAY (av)[0]))
1161 prepare_schedule (aTHX_ ta); 2860 {
1162 api_ready (prev); 2861 SvIVX (AvARRAY (av)[0]) = 0;
1163 return 1; 2862 frame->prepare = prepare_nop;
2863 frame->check = slf_check_nop;
1164 } 2864 }
1165 else 2865 else
2866 {
2867 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2868
2869 av_push (av, waiter);
2870
2871 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2872 frame->prepare = prepare_schedule;
2873 frame->check = slf_check_signal_wait;
2874 }
2875}
2876
2877/*****************************************************************************/
2878/* Coro::AIO */
2879
2880#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2881
2882/* helper storage struct */
2883struct io_state
2884{
2885 int errorno;
2886 I32 laststype; /* U16 in 5.10.0 */
2887 int laststatval;
2888 Stat_t statcache;
2889};
2890
2891static void
2892coro_aio_callback (pTHX_ CV *cv)
2893{
2894 dXSARGS;
2895 AV *state = (AV *)S_GENSUB_ARG;
2896 SV *coro = av_pop (state);
2897 SV *data_sv = newSV (sizeof (struct io_state));
2898
2899 av_extend (state, items - 1);
2900
2901 sv_upgrade (data_sv, SVt_PV);
2902 SvCUR_set (data_sv, sizeof (struct io_state));
2903 SvPOK_only (data_sv);
2904
2905 {
2906 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2907
2908 data->errorno = errno;
2909 data->laststype = PL_laststype;
2910 data->laststatval = PL_laststatval;
2911 data->statcache = PL_statcache;
2912 }
2913
2914 /* now build the result vector out of all the parameters and the data_sv */
2915 {
2916 int i;
2917
2918 for (i = 0; i < items; ++i)
2919 av_push (state, SvREFCNT_inc_NN (ST (i)));
2920 }
2921
2922 av_push (state, data_sv);
2923
2924 api_ready (aTHX_ coro);
2925 SvREFCNT_dec (coro);
2926 SvREFCNT_dec ((AV *)state);
2927}
2928
2929static int
2930slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2931{
2932 AV *state = (AV *)frame->data;
2933
2934 /* if we are about to throw, return early */
2935 /* this does not cancel the aio request, but at least */
2936 /* it quickly returns */
2937 if (CORO_THROW)
1166 return 0; 2938 return 0;
1167}
1168 2939
1169static void 2940 /* one element that is an RV? repeat! */
1170api_schedule (void) 2941 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; 2942 return 1;
2943
2944 /* restore status */
2945 {
2946 SV *data_sv = av_pop (state);
2947 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2948
2949 errno = data->errorno;
2950 PL_laststype = data->laststype;
2951 PL_laststatval = data->laststatval;
2952 PL_statcache = data->statcache;
2953
2954 SvREFCNT_dec (data_sv);
1191 } 2955 }
1192 else 2956
2957 /* push result values */
2958 {
2959 dSP;
2960 int i;
2961
2962 EXTEND (SP, AvFILLp (state) + 1);
2963 for (i = 0; i <= AvFILLp (state); ++i)
2964 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2965
2966 PUTBACK;
2967 }
2968
1193 return 0; 2969 return 0;
1194} 2970}
1195 2971
1196static int 2972static void
1197api_cede_notself (void) 2973slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1198{ 2974{
1199 dTHX; 2975 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1200 struct transfer_args ta; 2976 SV *coro_hv = SvRV (coro_current);
2977 struct coro *coro = SvSTATE_hv (coro_hv);
1201 2978
1202 if (prepare_cede_notself (aTHX_ &ta)) 2979 /* put our coroutine id on the state arg */
1203 { 2980 av_push (state, SvREFCNT_inc_NN (coro_hv));
1204 TRANSFER (ta); 2981
1205 return 1; 2982 /* first see whether we have a non-zero priority and set it as AIO prio */
2983 if (coro->prio)
1206 } 2984 {
1207 else 2985 dSP;
1208 return 0;
1209}
1210 2986
2987 static SV *prio_cv;
2988 static SV *prio_sv;
2989
2990 if (expect_false (!prio_cv))
2991 {
2992 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2993 prio_sv = newSViv (0);
2994 }
2995
2996 PUSHMARK (SP);
2997 sv_setiv (prio_sv, coro->prio);
2998 XPUSHs (prio_sv);
2999
3000 PUTBACK;
3001 call_sv (prio_cv, G_VOID | G_DISCARD);
3002 }
3003
3004 /* now call the original request */
3005 {
3006 dSP;
3007 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3008 int i;
3009
3010 PUSHMARK (SP);
3011
3012 /* first push all args to the stack */
3013 EXTEND (SP, items + 1);
3014
3015 for (i = 0; i < items; ++i)
3016 PUSHs (arg [i]);
3017
3018 /* now push the callback closure */
3019 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3020
3021 /* now call the AIO function - we assume our request is uncancelable */
3022 PUTBACK;
3023 call_sv ((SV *)req, G_VOID | G_DISCARD);
3024 }
3025
3026 /* now that the request is going, we loop till we have a result */
3027 frame->data = (void *)state;
3028 frame->prepare = prepare_schedule;
3029 frame->check = slf_check_aio_req;
3030}
3031
3032static void
3033coro_aio_req_xs (pTHX_ CV *cv)
3034{
3035 dXSARGS;
3036
3037 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3038
3039 XSRETURN_EMPTY;
3040}
3041
3042/*****************************************************************************/
3043
3044#if CORO_CLONE
3045# include "clone.c"
3046#endif
3047
3048/*****************************************************************************/
3049
3050static SV *
3051coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3052{
3053 SV *coro_sv;
3054 struct coro *coro;
3055 MAGIC *mg;
3056 HV *hv;
3057 SV *cb;
3058 int i;
3059
3060 if (argc > 0)
3061 {
3062 cb = s_get_cv_croak (argv [0]);
3063
3064 if (!is_coro)
3065 {
3066 if (CvISXSUB (cb))
3067 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3068
3069 if (!CvROOT (cb))
3070 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3071 }
3072 }
3073
3074 Newz (0, coro, 1, struct coro);
3075 coro->args = newAV ();
3076 coro->flags = CF_NEW;
3077
3078 if (coro_first) coro_first->prev = coro;
3079 coro->next = coro_first;
3080 coro_first = coro;
3081
3082 coro->hv = hv = newHV ();
3083 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3084 mg->mg_flags |= MGf_DUP;
3085 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3086
3087 if (argc > 0)
3088 {
3089 av_extend (coro->args, argc + is_coro - 1);
3090
3091 if (is_coro)
3092 {
3093 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3094 cb = (SV *)cv_coro_run;
3095 }
3096
3097 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3098
3099 for (i = 1; i < argc; i++)
3100 av_push (coro->args, newSVsv (argv [i]));
3101 }
3102
3103 return coro_sv;
3104}
3105
1211MODULE = Coro::State PACKAGE = Coro::State 3106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 3107
1213PROTOTYPES: DISABLE 3108PROTOTYPES: DISABLE
1214 3109
1215BOOT: 3110BOOT:
1216{ 3111{
1217#ifdef USE_ITHREADS 3112#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 3113# if CORO_PTHREAD
3114 coro_thx = PERL_GET_CONTEXT;
3115# endif
1219#endif 3116#endif
1220 BOOT_PAGESIZE; 3117 BOOT_PAGESIZE;
1221 3118
3119 cctx_current = cctx_new_empty ();
3120
3121 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3122 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3123
3124 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3125 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3126 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3127
3128 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3129 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3130 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3131
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3132 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 3133
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3134 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3135 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)); 3136 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3137 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 3138
1232 main_mainstack = PL_mainstack; 3139 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 3140 main_top_env = PL_top_env;
1234 3141
1235 while (main_top_env->je_prev) 3142 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 3143 main_top_env = main_top_env->je_prev;
1237 3144
3145 {
3146 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3147
3148 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3149 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3150
3151 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3152 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3153 }
3154
1238 coroapi.ver = CORO_API_VERSION; 3155 coroapi.ver = CORO_API_VERSION;
3156 coroapi.rev = CORO_API_REVISION;
3157
1239 coroapi.transfer = api_transfer; 3158 coroapi.transfer = api_transfer;
1240 3159
3160 coroapi.sv_state = SvSTATE_;
3161 coroapi.execute_slf = api_execute_slf;
3162 coroapi.prepare_nop = prepare_nop;
3163 coroapi.prepare_schedule = prepare_schedule;
3164 coroapi.prepare_cede = prepare_cede;
3165 coroapi.prepare_cede_notself = prepare_cede_notself;
3166
3167 time_init (aTHX);
3168
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3169 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1242} 3170}
1243 3171
1244SV * 3172SV *
1245new (char *klass, ...) 3173new (SV *klass, ...)
3174 ALIAS:
3175 Coro::new = 1
1246 CODE: 3176 CODE:
1247{ 3177 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: 3178 OUTPUT:
1276 RETVAL 3179 RETVAL
1277 3180
1278int 3181void
1279save_also (SV *coro_sv, int save_also) 3182transfer (...)
3183 PROTOTYPE: $$
1280 CODE: 3184 CODE:
1281{ 3185 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
1289void
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 3186
1336bool 3187bool
1337_destroy (SV *coro_sv) 3188_destroy (SV *coro_sv)
1338 CODE: 3189 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3190 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT: 3191 OUTPUT:
1341 RETVAL 3192 RETVAL
1342 3193
1343void 3194void
1344_exit (code) 3195_exit (int code)
1345 int code
1346 PROTOTYPE: $ 3196 PROTOTYPE: $
1347 CODE: 3197 CODE:
1348 _exit (code); 3198 _exit (code);
1349 3199
3200SV *
3201clone (Coro::State coro)
3202 CODE:
3203{
3204#if CORO_CLONE
3205 struct coro *ncoro = coro_clone (aTHX_ coro);
3206 MAGIC *mg;
3207 /* TODO: too much duplication */
3208 ncoro->hv = newHV ();
3209 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3210 mg->mg_flags |= MGf_DUP;
3211 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3212#else
3213 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3214#endif
3215}
3216 OUTPUT:
3217 RETVAL
3218
1350int 3219int
1351cctx_stacksize (int new_stacksize = 0) 3220cctx_stacksize (int new_stacksize = 0)
3221 PROTOTYPE: ;$
1352 CODE: 3222 CODE:
1353 RETVAL = coro_stacksize; 3223 RETVAL = cctx_stacksize;
1354 if (new_stacksize) 3224 if (new_stacksize)
3225 {
1355 coro_stacksize = new_stacksize; 3226 cctx_stacksize = new_stacksize;
3227 ++cctx_gen;
3228 }
1356 OUTPUT: 3229 OUTPUT:
1357 RETVAL 3230 RETVAL
1358 3231
1359int 3232int
3233cctx_max_idle (int max_idle = 0)
3234 PROTOTYPE: ;$
3235 CODE:
3236 RETVAL = cctx_max_idle;
3237 if (max_idle > 1)
3238 cctx_max_idle = max_idle;
3239 OUTPUT:
3240 RETVAL
3241
3242int
1360cctx_count () 3243cctx_count ()
3244 PROTOTYPE:
1361 CODE: 3245 CODE:
1362 RETVAL = cctx_count; 3246 RETVAL = cctx_count;
1363 OUTPUT: 3247 OUTPUT:
1364 RETVAL 3248 RETVAL
1365 3249
1366int 3250int
1367cctx_idle () 3251cctx_idle ()
3252 PROTOTYPE:
1368 CODE: 3253 CODE:
1369 RETVAL = cctx_idle; 3254 RETVAL = cctx_idle;
1370 OUTPUT: 3255 OUTPUT:
1371 RETVAL 3256 RETVAL
1372 3257
1373void 3258void
1374list () 3259list ()
3260 PROTOTYPE:
1375 PPCODE: 3261 PPCODE:
1376{ 3262{
1377 struct coro *coro; 3263 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 3264 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 3265 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3266 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 3267}
1382 3268
1383void 3269void
1384_eval (Coro::State coro, SV *coderef) 3270call (Coro::State coro, SV *coderef)
3271 ALIAS:
3272 eval = 1
1385 CODE: 3273 CODE:
1386{ 3274{
1387 if (coro->mainstack) 3275 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1388 { 3276 {
1389 struct coro temp; 3277 struct coro *current = SvSTATE_current;
1390 Zero (&temp, 1, struct coro);
1391 temp.save = CORO_SAVE_ALL;
1392 3278
1393 if (!(coro->flags & CF_RUNNING)) 3279 if (current != coro)
1394 { 3280 {
3281 PUTBACK;
1395 save_perl (aTHX_ &temp); 3282 save_perl (aTHX_ current);
1396 load_perl (aTHX_ coro); 3283 load_perl (aTHX_ coro);
3284 SPAGAIN;
1397 } 3285 }
1398 3286
1399 { 3287 PUSHSTACK;
1400 dSP; 3288
1401 ENTER;
1402 SAVETMPS;
1403 PUSHMARK (SP); 3289 PUSHMARK (SP);
1404 PUTBACK; 3290 PUTBACK;
3291
3292 if (ix)
3293 eval_sv (coderef, 0);
3294 else
1405 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3295 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3296
3297 POPSTACK;
1406 SPAGAIN; 3298 SPAGAIN;
1407 FREETMPS;
1408 LEAVE;
1409 PUTBACK;
1410 }
1411 3299
1412 if (!(coro->flags & CF_RUNNING)) 3300 if (current != coro)
1413 { 3301 {
3302 PUTBACK;
1414 save_perl (aTHX_ coro); 3303 save_perl (aTHX_ coro);
1415 load_perl (aTHX_ &temp); 3304 load_perl (aTHX_ current);
3305 SPAGAIN;
1416 } 3306 }
1417 } 3307 }
1418} 3308}
1419 3309
1420SV * 3310SV *
1421is_ready (Coro::State coro) 3311is_ready (Coro::State coro)
1422 PROTOTYPE: $ 3312 PROTOTYPE: $
1423 ALIAS: 3313 ALIAS:
1424 is_ready = CF_READY 3314 is_ready = CF_READY
1425 is_running = CF_RUNNING 3315 is_running = CF_RUNNING
1426 is_new = CF_NEW 3316 is_new = CF_NEW
1427 is_destroyed = CF_DESTROYED 3317 is_destroyed = CF_DESTROYED
3318 is_suspended = CF_SUSPENDED
1428 CODE: 3319 CODE:
1429 RETVAL = boolSV (coro->flags & ix); 3320 RETVAL = boolSV (coro->flags & ix);
1430 OUTPUT: 3321 OUTPUT:
1431 RETVAL 3322 RETVAL
1432 3323
1433IV 3324void
3325throw (Coro::State self, SV *exception = &PL_sv_undef)
3326 PROTOTYPE: $;$
3327 CODE:
3328{
3329 struct coro *current = SvSTATE_current;
3330 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3331 SvREFCNT_dec (*exceptionp);
3332 SvGETMAGIC (exception);
3333 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3334}
3335
3336void
3337api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3338 PROTOTYPE: $;$
3339 C_ARGS: aTHX_ coro, flags
3340
3341SV *
3342has_cctx (Coro::State coro)
3343 PROTOTYPE: $
3344 CODE:
3345 /* maybe manage the running flag differently */
3346 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3347 OUTPUT:
3348 RETVAL
3349
3350int
3351is_traced (Coro::State coro)
3352 PROTOTYPE: $
3353 CODE:
3354 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3355 OUTPUT:
3356 RETVAL
3357
3358UV
1434rss (Coro::State coro) 3359rss (Coro::State coro)
1435 PROTOTYPE: $ 3360 PROTOTYPE: $
3361 ALIAS:
3362 usecount = 1
1436 CODE: 3363 CODE:
1437 RETVAL = coro_rss (coro); 3364 switch (ix)
3365 {
3366 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3367 case 1: RETVAL = coro->usecount; break;
3368 }
1438 OUTPUT: 3369 OUTPUT:
1439 RETVAL 3370 RETVAL
1440 3371
3372void
3373force_cctx ()
3374 PROTOTYPE:
3375 CODE:
3376 cctx_current->idle_sp = 0;
3377
3378void
3379swap_defsv (Coro::State self)
3380 PROTOTYPE: $
3381 ALIAS:
3382 swap_defav = 1
3383 CODE:
3384 if (!self->slot)
3385 croak ("cannot swap state with coroutine that has no saved state,");
3386 else
3387 {
3388 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3389 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3390
3391 SV *tmp = *src; *src = *dst; *dst = tmp;
3392 }
3393
3394void
3395cancel (Coro::State self)
3396 CODE:
3397 coro_state_destroy (aTHX_ self);
3398 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3399
3400
3401SV *
3402enable_times (int enabled = enable_times)
3403 CODE:
3404{
3405 RETVAL = boolSV (enable_times);
3406
3407 if (enabled != enable_times)
3408 {
3409 enable_times = enabled;
3410
3411 coro_times_update ();
3412 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3413 }
3414}
3415 OUTPUT:
3416 RETVAL
3417
3418void
3419times (Coro::State self)
3420 PPCODE:
3421{
3422 struct coro *current = SvSTATE (coro_current);
3423
3424 if (expect_false (current == self))
3425 {
3426 coro_times_update ();
3427 coro_times_add (SvSTATE (coro_current));
3428 }
3429
3430 EXTEND (SP, 2);
3431 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3432 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3433
3434 if (expect_false (current == self))
3435 coro_times_sub (SvSTATE (coro_current));
3436}
3437
3438void
3439swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3440 CODE:
3441{
3442 struct coro *current = SvSTATE_current;
3443
3444 if (current == coro)
3445 SWAP_SVS (current);
3446
3447 if (!coro->swap_sv)
3448 coro->swap_sv = newAV ();
3449
3450 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3451 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3452
3453 if (current == coro)
3454 SWAP_SVS (current);
3455}
3456
1441 3457
1442MODULE = Coro::State PACKAGE = Coro 3458MODULE = Coro::State PACKAGE = Coro
1443 3459
1444BOOT: 3460BOOT:
1445{ 3461{
1446 int i;
1447
1448 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3462 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1449 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3463 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3464 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3465 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3466 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1450 av_async_pool = get_av ("Coro::async_pool", TRUE); 3467 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3468 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3469 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3470 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1451 3471
1452 coro_current = get_sv ("Coro::current", FALSE); 3472 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1453 SvREADONLY_on (coro_current); 3473 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1454 3474 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3475 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3476
1455 coro_stash = gv_stashpv ("Coro", TRUE); 3477 coro_stash = gv_stashpv ("Coro", TRUE);
1456 3478
1457 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3479 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1458 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3480 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1459 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3481 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1460 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3482 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1461 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3483 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1462 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3484 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 3485
1467 { 3486 {
1468 SV *sv = perl_get_sv("Coro::API", 1); 3487 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1469 3488
1470 coroapi.schedule = api_schedule; 3489 coroapi.schedule = api_schedule;
1471 coroapi.save = api_save; 3490 coroapi.schedule_to = api_schedule_to;
1472 coroapi.cede = api_cede; 3491 coroapi.cede = api_cede;
1473 coroapi.cede_notself = api_cede_notself; 3492 coroapi.cede_notself = api_cede_notself;
1474 coroapi.ready = api_ready; 3493 coroapi.ready = api_ready;
1475 coroapi.is_ready = api_is_ready; 3494 coroapi.is_ready = api_is_ready;
1476 coroapi.nready = &coro_nready; 3495 coroapi.nready = coro_nready;
1477 coroapi.current = coro_current; 3496 coroapi.current = coro_current;
1478 3497
1479 GCoroAPI = &coroapi; 3498 /*GCoroAPI = &coroapi;*/
1480 sv_setiv (sv, (IV)&coroapi); 3499 sv_setiv (sv, (IV)&coroapi);
1481 SvREADONLY_on (sv); 3500 SvREADONLY_on (sv);
1482 } 3501 }
1483} 3502}
3503
3504SV *
3505async (...)
3506 PROTOTYPE: &@
3507 CODE:
3508 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3509 api_ready (aTHX_ RETVAL);
3510 OUTPUT:
3511 RETVAL
3512
3513void
3514terminate (...)
3515 CODE:
3516 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3517
3518void
3519schedule (...)
3520 CODE:
3521 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3522
3523void
3524schedule_to (...)
3525 CODE:
3526 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3527
3528void
3529cede_to (...)
3530 CODE:
3531 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3532
3533void
3534cede (...)
3535 CODE:
3536 CORO_EXECUTE_SLF_XS (slf_init_cede);
3537
3538void
3539cede_notself (...)
3540 CODE:
3541 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1484 3542
1485void 3543void
1486_set_current (SV *current) 3544_set_current (SV *current)
1487 PROTOTYPE: $ 3545 PROTOTYPE: $
1488 CODE: 3546 CODE:
1489 SvREFCNT_dec (SvRV (coro_current)); 3547 SvREFCNT_dec (SvRV (coro_current));
1490 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3548 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3549
3550void
3551_set_readyhook (SV *hook)
3552 PROTOTYPE: $
3553 CODE:
3554 SvREFCNT_dec (coro_readyhook);
3555 SvGETMAGIC (hook);
3556 if (SvOK (hook))
3557 {
3558 coro_readyhook = newSVsv (hook);
3559 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3560 }
3561 else
3562 {
3563 coro_readyhook = 0;
3564 CORO_READYHOOK = 0;
3565 }
1491 3566
1492int 3567int
1493prio (Coro::State coro, int newprio = 0) 3568prio (Coro::State coro, int newprio = 0)
3569 PROTOTYPE: $;$
1494 ALIAS: 3570 ALIAS:
1495 nice = 1 3571 nice = 1
1496 CODE: 3572 CODE:
1497{ 3573{
1498 RETVAL = coro->prio; 3574 RETVAL = coro->prio;
… …
1500 if (items > 1) 3576 if (items > 1)
1501 { 3577 {
1502 if (ix) 3578 if (ix)
1503 newprio = coro->prio - newprio; 3579 newprio = coro->prio - newprio;
1504 3580
1505 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3581 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1506 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3582 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1507 3583
1508 coro->prio = newprio; 3584 coro->prio = newprio;
1509 } 3585 }
1510} 3586}
1511 OUTPUT: 3587 OUTPUT:
… …
1513 3589
1514SV * 3590SV *
1515ready (SV *self) 3591ready (SV *self)
1516 PROTOTYPE: $ 3592 PROTOTYPE: $
1517 CODE: 3593 CODE:
1518 RETVAL = boolSV (api_ready (self)); 3594 RETVAL = boolSV (api_ready (aTHX_ self));
1519 OUTPUT: 3595 OUTPUT:
1520 RETVAL 3596 RETVAL
1521 3597
1522int 3598int
1523nready (...) 3599nready (...)
… …
1525 CODE: 3601 CODE:
1526 RETVAL = coro_nready; 3602 RETVAL = coro_nready;
1527 OUTPUT: 3603 OUTPUT:
1528 RETVAL 3604 RETVAL
1529 3605
1530# for async_pool speedup 3606void
3607suspend (Coro::State self)
3608 PROTOTYPE: $
3609 CODE:
3610 self->flags |= CF_SUSPENDED;
3611
3612void
3613resume (Coro::State self)
3614 PROTOTYPE: $
3615 CODE:
3616 self->flags &= ~CF_SUSPENDED;
3617
3618void
3619_pool_handler (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3622
3623void
3624async_pool (SV *cv, ...)
3625 PROTOTYPE: &@
3626 PPCODE:
3627{
3628 HV *hv = (HV *)av_pop (av_async_pool);
3629 AV *av = newAV ();
3630 SV *cb = ST (0);
3631 int i;
3632
3633 av_extend (av, items - 2);
3634 for (i = 1; i < items; ++i)
3635 av_push (av, SvREFCNT_inc_NN (ST (i)));
3636
3637 if ((SV *)hv == &PL_sv_undef)
3638 {
3639 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3640 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3641 SvREFCNT_dec (sv);
3642 }
3643
3644 {
3645 struct coro *coro = SvSTATE_hv (hv);
3646
3647 assert (!coro->invoke_cb);
3648 assert (!coro->invoke_av);
3649 coro->invoke_cb = SvREFCNT_inc (cb);
3650 coro->invoke_av = av;
3651 }
3652
3653 api_ready (aTHX_ (SV *)hv);
3654
3655 if (GIMME_V != G_VOID)
3656 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3657 else
3658 SvREFCNT_dec (hv);
3659}
3660
1531SV * 3661SV *
1532_pool_1 (...) 3662rouse_cb ()
3663 PROTOTYPE:
1533 CODE: 3664 CODE:
1534{ 3665 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 av_clear (defav);
1551
1552 RETVAL = sv_2mortal (SvREFCNT_inc (AvARRAY (invoke_av)[0]));
1553
1554 if (len > 0)
1555 {
1556 av_extend (defav, len);
1557 for (i = 0; i < len; ++i)
1558 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1559 }
1560
1561 SvREFCNT_dec (invoke);
1562}
1563 OUTPUT: 3666 OUTPUT:
1564 RETVAL 3667 RETVAL
1565 3668
1566void 3669void
1567_pool_2 (...) 3670rouse_wait (...)
3671 PROTOTYPE: ;$
3672 PPCODE:
3673 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3674
3675void
3676on_enter (SV *block)
3677 ALIAS:
3678 on_leave = 1
3679 PROTOTYPE: &
1568 CODE: 3680 CODE:
1569{ 3681{
1570 struct coro *coro = SvSTATE (coro_current); 3682 struct coro *coro = SvSTATE_current;
3683 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1571 3684
1572 if (coro_rss (coro) > SvIV (sv_pool_rss) 3685 block = s_get_cv_croak (block);
1573 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1574 XSRETURN_YES;
1575 3686
1576 av_clear (GvAV (PL_defgv)); 3687 if (!*avp)
1577 hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1, 3688 *avp = newAV ();
1578 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1579 coro->save = CORO_SAVE_DEF;
1580 coro->prio = 0;
1581 av_push (av_async_pool, newSVsv (coro_current));
1582 3689
1583 XSRETURN_NO; 3690 av_push (*avp, SvREFCNT_inc (block));
1584}
1585 3691
3692 if (!ix)
3693 on_enterleave_call (aTHX_ block);
1586 3694
3695 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3696 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3697 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3698}
3699
3700
3701MODULE = Coro::State PACKAGE = PerlIO::cede
3702
3703BOOT:
3704 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3705
3706
1587MODULE = Coro::State PACKAGE = Coro::AIO 3707MODULE = Coro::State PACKAGE = Coro::Semaphore
1588 3708
1589SV * 3709SV *
1590_get_state () 3710new (SV *klass, SV *count = 0)
1591 CODE: 3711 CODE:
1592{ 3712{
1593 struct io_state *data; 3713 int semcnt = 1;
1594 3714
1595 RETVAL = newSV (sizeof (struct io_state)); 3715 if (count)
1596 data = (struct io_state *)SvPVX (RETVAL); 3716 {
1597 SvCUR_set (RETVAL, sizeof (struct io_state)); 3717 SvGETMAGIC (count);
1598 SvPOK_only (RETVAL);
1599 3718
1600 data->errorno = errno; 3719 if (SvOK (count))
1601 data->laststype = PL_laststype; 3720 semcnt = SvIV (count);
1602 data->laststatval = PL_laststatval; 3721 }
1603 data->statcache = PL_statcache; 3722
3723 RETVAL = sv_bless (
3724 coro_waitarray_new (aTHX_ semcnt),
3725 GvSTASH (CvGV (cv))
3726 );
1604} 3727}
1605 OUTPUT: 3728 OUTPUT:
1606 RETVAL 3729 RETVAL
1607 3730
3731# helper for Coro::Channel and others
3732SV *
3733_alloc (int count)
3734 CODE:
3735 RETVAL = coro_waitarray_new (aTHX_ count);
3736 OUTPUT:
3737 RETVAL
3738
3739SV *
3740count (SV *self)
3741 CODE:
3742 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3743 OUTPUT:
3744 RETVAL
3745
1608void 3746void
1609_set_state (char *data_) 3747up (SV *self, int adjust = 1)
1610 PROTOTYPE: $ 3748 ALIAS:
3749 adjust = 1
3750 CODE:
3751 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3752
3753void
3754down (...)
3755 CODE:
3756 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3757
3758void
3759wait (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3762
3763void
3764try (SV *self)
3765 PPCODE:
3766{
3767 AV *av = (AV *)SvRV (self);
3768 SV *count_sv = AvARRAY (av)[0];
3769 IV count = SvIVX (count_sv);
3770
3771 if (count > 0)
3772 {
3773 --count;
3774 SvIVX (count_sv) = count;
3775 XSRETURN_YES;
3776 }
3777 else
3778 XSRETURN_NO;
3779}
3780
3781void
3782waiters (SV *self)
3783 PPCODE:
3784{
3785 AV *av = (AV *)SvRV (self);
3786 int wcount = AvFILLp (av) + 1 - 1;
3787
3788 if (GIMME_V == G_SCALAR)
3789 XPUSHs (sv_2mortal (newSViv (wcount)));
3790 else
3791 {
3792 int i;
3793 EXTEND (SP, wcount);
3794 for (i = 1; i <= wcount; ++i)
3795 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3796 }
3797}
3798
3799MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3800
3801void
3802_may_delete (SV *sem, int count, int extra_refs)
3803 PPCODE:
3804{
3805 AV *av = (AV *)SvRV (sem);
3806
3807 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3808 && AvFILLp (av) == 0 /* no waiters, just count */
3809 && SvIV (AvARRAY (av)[0]) == count)
3810 XSRETURN_YES;
3811
3812 XSRETURN_NO;
3813}
3814
3815MODULE = Coro::State PACKAGE = Coro::Signal
3816
3817SV *
3818new (SV *klass)
1611 CODE: 3819 CODE:
1612{ 3820 RETVAL = sv_bless (
1613 struct io_state *data = (void *)data_; 3821 coro_waitarray_new (aTHX_ 0),
3822 GvSTASH (CvGV (cv))
3823 );
3824 OUTPUT:
3825 RETVAL
1614 3826
1615 errno = data->errorno; 3827void
1616 PL_laststype = data->laststype; 3828wait (...)
1617 PL_laststatval = data->laststatval; 3829 CODE:
1618 PL_statcache = data->statcache; 3830 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
1619}
1620 3831
3832void
3833broadcast (SV *self)
3834 CODE:
3835{
3836 AV *av = (AV *)SvRV (self);
3837 coro_signal_wake (aTHX_ av, AvFILLp (av));
3838}
3839
3840void
3841send (SV *self)
3842 CODE:
3843{
3844 AV *av = (AV *)SvRV (self);
3845
3846 if (AvFILLp (av))
3847 coro_signal_wake (aTHX_ av, 1);
3848 else
3849 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3850}
3851
3852IV
3853awaited (SV *self)
3854 CODE:
3855 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3856 OUTPUT:
3857 RETVAL
3858
3859
3860MODULE = Coro::State PACKAGE = Coro::AnyEvent
3861
3862BOOT:
3863 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3864
3865void
3866_schedule (...)
3867 CODE:
3868{
3869 static int incede;
3870
3871 api_cede_notself (aTHX);
3872
3873 ++incede;
3874 while (coro_nready >= incede && api_cede (aTHX))
3875 ;
3876
3877 sv_setsv (sv_activity, &PL_sv_undef);
3878 if (coro_nready >= incede)
3879 {
3880 PUSHMARK (SP);
3881 PUTBACK;
3882 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3883 }
3884
3885 --incede;
3886}
3887
3888
3889MODULE = Coro::State PACKAGE = Coro::AIO
3890
3891void
3892_register (char *target, char *proto, SV *req)
3893 CODE:
3894{
3895 SV *req_cv = s_get_cv_croak (req);
3896 /* newXSproto doesn't return the CV on 5.8 */
3897 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3898 sv_setpv ((SV *)slf_cv, proto);
3899 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3900}
3901
3902MODULE = Coro::State PACKAGE = Coro::Select
3903
3904void
3905patch_pp_sselect ()
3906 CODE:
3907 if (!coro_old_pp_sselect)
3908 {
3909 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3910 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3911 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3912 }
3913
3914void
3915unpatch_pp_sselect ()
3916 CODE:
3917 if (coro_old_pp_sselect)
3918 {
3919 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3920 coro_old_pp_sselect = 0;
3921 }
3922

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