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Comparing Coro/Coro/State.xs (file contents):
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs.
Revision 1.415 by root, Tue Aug 30 07:48:53 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"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
8 18
19#include <stddef.h>
9#include <stdio.h> 20#include <stdio.h>
10#include <errno.h> 21#include <errno.h>
11#include <assert.h> 22#include <assert.h>
12 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
37
13#ifdef HAVE_MMAP 38#if HAVE_MMAP
14# include <unistd.h> 39# include <unistd.h>
15# include <sys/mman.h> 40# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON 42# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
31#else 56#else
32# define PAGESIZE 0 57# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
34#endif 59#endif
35 60
36#if USE_VALGRIND 61#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
38#endif 63#endif
39 64
40/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
42 67
43#define PERL_VERSION_ATLEAST(a,b,c) \ 68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
44 (PERL_REVISION > (a) \ 69# define HAS_SCOPESTACK_NAME 1
45 || (PERL_REVISION == (a) \ 70#endif
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48 71
49#if !PERL_VERSION_ATLEAST (5,6,0) 72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50# ifndef PL_ppaddr 73# undef CORO_STACKGUARD
51# define PL_ppaddr ppaddr 74#endif
75
76#ifndef CORO_STACKGUARD
77# define CORO_STACKGUARD 0
78#endif
79
80/* prefer perl internal functions over our own? */
81#ifndef CORO_PREFER_PERL_FUNCTIONS
82# define CORO_PREFER_PERL_FUNCTIONS 0
83#endif
84
85/* The next macros try to return the current stack pointer, in an as
86 * portable way as possible. */
87#if __GNUC__ >= 4
88# define dSTACKLEVEL int stacklevel_dummy
89# define STACKLEVEL __builtin_frame_address (0)
90#else
91# define dSTACKLEVEL volatile void *stacklevel
92# define STACKLEVEL ((void *)&stacklevel)
93#endif
94
95#define IN_DESTRUCT PL_dirty
96
97#include "CoroAPI.h"
98#define GCoroAPI (&coroapi) /* very sneaky */
99
100#ifdef USE_ITHREADS
101# if CORO_PTHREAD
102static void *coro_thx;
52# endif 103# endif
53# ifndef call_sv 104#endif
54# define call_sv perl_call_sv 105
106/* used in state.h */
107#define VAR(name,type) VARx(name, PL_ ## name, type)
108
109#ifdef __linux
110# include <time.h> /* for timespec */
111# include <syscall.h> /* for SYS_* */
112# ifdef SYS_clock_gettime
113# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
114# define CORO_CLOCK_MONOTONIC 1
115# define CORO_CLOCK_THREAD_CPUTIME_ID 3
55# endif 116# endif
56# ifndef get_sv
57# define get_sv perl_get_sv
58# endif 117#endif
59# ifndef get_cv
60# define get_cv perl_get_cv
61# endif
62# ifndef IS_PADGV
63# define IS_PADGV(v) 0
64# endif
65# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0
67# endif
68#endif
69 118
70/* 5.8.7 */ 119static double (*nvtime)(); /* so why doesn't it take void? */
71#ifndef SvRV_set 120static void (*u2time)(pTHX_ UV ret[2]);
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
74 121
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 122/* we hijack an hopefully unused CV flag for our purposes */
76# undef STACKGUARD 123#define CVf_SLF 0x4000
77#endif 124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
78 126
79#ifndef STACKGUARD 127static U32 cctx_gen;
80# define STACKGUARD 0 128static size_t cctx_stacksize = CORO_STACKSIZE;
81#endif
82
83/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0
86#endif
87
88/* The next macro should declare a variable stacklevel that contains and approximation
89 * to the current C stack pointer. Its property is that it changes with each call
90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
92#define STACKLEVEL ((void *)&stacklevel)
93
94#define IN_DESTRUCT (PL_main_cv == Nullcv)
95
96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory")
99#else
100# define attribute(x)
101# define BARRIER
102#endif
103
104#define NOINLINE attribute ((noinline))
105
106#include "CoroAPI.h"
107
108#ifdef USE_ITHREADS
109static perl_mutex coro_mutex;
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif
116
117struct io_state
118{
119 int errorno;
120 I32 laststype;
121 int laststatval;
122 Stat_t statcache;
123};
124
125static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
126static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
131static JMPENV *main_top_env;
127static HV *coro_state_stash, *coro_stash; 132static HV *coro_state_stash, *coro_stash;
128static SV *coro_mortal; /* will be freed after next transfer */ 133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
134
135static AV *av_destroy; /* destruction queue */
136static SV *sv_manager; /* the manager coro */
137static SV *sv_idle; /* $Coro::idle */
138
139static GV *irsgv; /* $/ */
140static GV *stdoutgv; /* *STDOUT */
141static SV *rv_diehook;
142static SV *rv_warnhook;
143static HV *hv_sig; /* %SIG */
144
145/* async_pool helper stuff */
146static SV *sv_pool_rss;
147static SV *sv_pool_size;
148static SV *sv_async_pool_idle; /* description string */
149static AV *av_async_pool; /* idle pool */
150static SV *sv_Coro; /* class string */
151static CV *cv_pool_handler;
152
153/* Coro::AnyEvent */
154static SV *sv_activity;
155
156/* enable processtime/realtime profiling */
157static char enable_times;
158typedef U32 coro_ts[2];
159static coro_ts time_real, time_cpu;
160static char times_valid;
129 161
130static struct coro_cctx *cctx_first; 162static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 163static int cctx_count, cctx_idle;
132 164
165enum
166{
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
133/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 176typedef struct coro_cctx
177{
135 struct coro_cctx *next; 178 struct coro_cctx *next;
136 179
137 /* the stack */ 180 /* the stack */
138 void *sptr; 181 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 182 size_t ssize;
140 183
141 /* cpu state */ 184 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
143 JMPENV *top_env; 187 JMPENV *top_env;
144 coro_context cctx; 188 coro_context cctx;
145 189
146 int inuse; 190 U32 gen;
147
148#if USE_VALGRIND 191#if CORO_USE_VALGRIND
149 int valgrind_id; 192 int valgrind_id;
150#endif 193#endif
194 unsigned char flags;
151} coro_cctx; 195} coro_cctx;
152 196
197static coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201static MGVTBL coro_state_vtbl;
202
153enum { 203enum
204{
154 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
155 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
156 CF_NEW = 0x0004, /* ahs never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
208 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
157}; 211};
158 212
213/* the structure where most of the perl state is stored, overlaid on the cxstack */
214typedef struct
215{
216#define VARx(name,expr,type) type name;
217# include "state.h"
218#undef VARx
219} perl_slots;
220
221/* how many context stack entries do we need for perl_slots */
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
223
159/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
160struct coro { 225struct coro
226{
161 /* the c coroutine allocated to this perl coroutine, if any */ 227 /* the C coroutine allocated to this perl coroutine, if any */
162 coro_cctx *cctx; 228 coro_cctx *cctx;
163 229
230 /* ready queue */
231 struct coro *next_ready;
232
233 /* state data */
234 struct CoroSLF slf_frame; /* saved slf frame */
235 AV *mainstack;
236 perl_slots *slot; /* basically the saved sp */
237
238 CV *startcv; /* the CV to execute */
164 /* data associated with this coroutine (initial args) */ 239 AV *args; /* data associated with this coroutine (initial args) */
165 AV *args;
166 int refcnt;
167 int save; /* CORO_SAVE flags */
168 int flags; /* CF_ flags */ 240 int flags; /* CF_ flags */
241 HV *hv; /* the perl hash associated with this coro, if any */
169 242
170 /* optionally saved, might be zero */ 243 /* statistics */
171 AV *defav; /* @_ */ 244 int usecount; /* number of transfers to this coro */
172 SV *defsv; /* $_ */
173 SV *errsv; /* $@ */
174 SV *irssv; /* $/ */
175 SV *irssv_sv; /* real $/ cache */
176
177#define VAR(name,type) type name;
178# include "state.h"
179#undef VAR
180 245
181 /* coro process data */ 246 /* coro process data */
182 int prio; 247 int prio;
248 SV *except; /* exception to be thrown */
249 SV *rouse_cb; /* last rouse callback */
250 AV *on_destroy; /* callbacks or coros to notify on destroy */
251 AV *status; /* the exit status list */
252
253 /* async_pool */
254 SV *saved_deffh;
255 SV *invoke_cb;
256 AV *invoke_av;
257
258 /* on_enter/on_leave */
259 AV *on_enter;
260 AV *on_leave;
261
262 /* swap_sv */
263 AV *swap_sv;
264
265 /* times */
266 coro_ts t_cpu, t_real;
267
268 /* linked list */
269 struct coro *next, *prev;
183}; 270};
184 271
185typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
186typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
187 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the main reason we don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
280/** Coro ********************************************************************/
281
282#define CORO_PRIO_MAX 3
283#define CORO_PRIO_HIGH 1
284#define CORO_PRIO_NORMAL 0
285#define CORO_PRIO_LOW -1
286#define CORO_PRIO_IDLE -3
287#define CORO_PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
293static CV *cv_coro_run;
294static struct coro *coro_first;
295#define coro_nready coroapi.nready
296
297/** JIT *********************************************************************/
298
299#if CORO_JIT
300 /* APPLE doesn't have HAVE_MMAP though */
301 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
302 #ifndef CORO_JIT_TYPE
303 #if __x86_64 && CORO_JIT_UNIXY
304 #define CORO_JIT_TYPE "amd64-unix"
305 #elif __i386 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "x86-unix"
307 #endif
308 #endif
309#endif
310
311#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
312 #undef CORO_JIT
313#endif
314
315#if CORO_JIT
316 typedef void (*load_save_perl_slots_type)(perl_slots *);
317 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
318#endif
319
320/** Coro::Select ************************************************************/
321
322static OP *(*coro_old_pp_sselect) (pTHX);
323static SV *coro_select_select;
324
325/* horrible hack, but if it works... */
188static AV * 326static OP *
327coro_pp_sselect (pTHX)
328{
329 dSP;
330 PUSHMARK (SP - 4); /* fake argument list */
331 XPUSHs (coro_select_select);
332 PUTBACK;
333
334 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
335 PL_op->op_flags |= OPf_STACKED;
336 PL_op->op_private = 0;
337 return PL_ppaddr [OP_ENTERSUB](aTHX);
338}
339
340/** time stuff **************************************************************/
341
342#ifdef HAS_GETTIMEOFDAY
343
344ecb_inline void
345coro_u2time (pTHX_ UV ret[2])
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 ret [0] = tv.tv_sec;
351 ret [1] = tv.tv_usec;
352}
353
354ecb_inline double
355coro_nvtime (void)
356{
357 struct timeval tv;
358 gettimeofday (&tv, 0);
359
360 return tv.tv_sec + tv.tv_usec * 1e-6;
361}
362
363ecb_inline void
364time_init (pTHX)
365{
366 nvtime = coro_nvtime;
367 u2time = coro_u2time;
368}
369
370#else
371
372ecb_inline void
373time_init (pTHX)
374{
375 SV **svp;
376
377 require_pv ("Time/HiRes.pm");
378
379 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
380
381 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
382 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
383
384 nvtime = INT2PTR (double (*)(), SvIV (*svp));
385
386 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
387 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
388}
389
390#endif
391
392/** lowlevel stuff **********************************************************/
393
394static SV * ecb_noinline
395coro_get_sv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_sv (name, create);
400#endif
401 return get_sv (name, create);
402}
403
404static AV * ecb_noinline
405coro_get_av (pTHX_ const char *name, int create)
406{
407#if PERL_VERSION_ATLEAST (5,10,0)
408 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
409 get_av (name, create);
410#endif
411 return get_av (name, create);
412}
413
414static HV * ecb_noinline
415coro_get_hv (pTHX_ const char *name, int create)
416{
417#if PERL_VERSION_ATLEAST (5,10,0)
418 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
419 get_hv (name, create);
420#endif
421 return get_hv (name, create);
422}
423
424ecb_inline void
425coro_times_update (void)
426{
427#ifdef coro_clock_gettime
428 struct timespec ts;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
432 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
433
434 ts.tv_sec = ts.tv_nsec = 0;
435 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
436 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
437#else
438 dTHX;
439 UV tv[2];
440
441 u2time (aTHX_ tv);
442 time_real [0] = tv [0];
443 time_real [1] = tv [1] * 1000;
444#endif
445}
446
447ecb_inline void
448coro_times_add (struct coro *c)
449{
450 c->t_real [1] += time_real [1];
451 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
452 c->t_real [0] += time_real [0];
453
454 c->t_cpu [1] += time_cpu [1];
455 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
456 c->t_cpu [0] += time_cpu [0];
457}
458
459ecb_inline void
460coro_times_sub (struct coro *c)
461{
462 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
463 c->t_real [1] -= time_real [1];
464 c->t_real [0] -= time_real [0];
465
466 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
467 c->t_cpu [1] -= time_cpu [1];
468 c->t_cpu [0] -= time_cpu [0];
469}
470
471/*****************************************************************************/
472/* magic glue */
473
474#define CORO_MAGIC_type_cv 26
475#define CORO_MAGIC_type_state PERL_MAGIC_ext
476
477#define CORO_MAGIC_NN(sv, type) \
478 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
479 ? SvMAGIC (sv) \
480 : mg_find (sv, type))
481
482#define CORO_MAGIC(sv, type) \
483 (ecb_expect_true (SvMAGIC (sv)) \
484 ? CORO_MAGIC_NN (sv, type) \
485 : 0)
486
487#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
488#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
489
490ecb_inline MAGIC *
491SvSTATEhv_p (pTHX_ SV *coro)
492{
493 MAGIC *mg;
494
495 if (ecb_expect_true (
496 SvTYPE (coro) == SVt_PVHV
497 && (mg = CORO_MAGIC_state (coro))
498 && mg->mg_virtual == &coro_state_vtbl
499 ))
500 return mg;
501
502 return 0;
503}
504
505ecb_inline struct coro *
506SvSTATE_ (pTHX_ SV *coro)
507{
508 MAGIC *mg;
509
510 if (SvROK (coro))
511 coro = SvRV (coro);
512
513 mg = SvSTATEhv_p (aTHX_ coro);
514 if (!mg)
515 croak ("Coro::State object required");
516
517 return (struct coro *)mg->mg_ptr;
518}
519
520#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
521
522/* faster than SvSTATE, but expects a coroutine hv */
523#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
524#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
525
526/*****************************************************************************/
527/* padlist management and caching */
528
529ecb_inline AV *
189coro_clone_padlist (CV *cv) 530coro_derive_padlist (pTHX_ CV *cv)
190{ 531{
191 AV *padlist = CvPADLIST (cv); 532 AV *padlist = CvPADLIST (cv);
192 AV *newpadlist, *newpad; 533 AV *newpadlist, *newpad;
193 534
194 newpadlist = newAV (); 535 newpadlist = newAV ();
195 AvREAL_off (newpadlist); 536 AvREAL_off (newpadlist);
196#if PERL_VERSION_ATLEAST (5,9,0) 537#if PERL_VERSION_ATLEAST (5,10,0)
197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
198#else 539#else
199 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
200#endif 541#endif
201 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 542 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
202 --AvFILLp (padlist); 543 --AvFILLp (padlist);
203 544
204 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 545 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
205 av_store (newpadlist, 1, (SV *)newpad); 546 av_store (newpadlist, 1, (SV *)newpad);
206 547
207 return newpadlist; 548 return newpadlist;
208} 549}
209 550
210static void 551ecb_inline void
211free_padlist (AV *padlist) 552free_padlist (pTHX_ AV *padlist)
212{ 553{
213 /* may be during global destruction */ 554 /* may be during global destruction */
214 if (SvREFCNT (padlist)) 555 if (!IN_DESTRUCT)
215 { 556 {
216 I32 i = AvFILLp (padlist); 557 I32 i = AvFILLp (padlist);
217 while (i >= 0) 558
559 while (i > 0) /* special-case index 0 */
218 { 560 {
219 SV **svp = av_fetch (padlist, i--, FALSE); 561 /* we try to be extra-careful here */
220 if (svp) 562 AV *av = (AV *)AvARRAY (padlist)[i--];
221 { 563 I32 j = AvFILLp (av);
222 SV *sv; 564
223 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 565 while (j >= 0)
566 SvREFCNT_dec (AvARRAY (av)[j--]);
567
568 AvFILLp (av) = -1;
224 SvREFCNT_dec (sv); 569 SvREFCNT_dec (av);
225
226 SvREFCNT_dec (*svp);
227 }
228 } 570 }
229 571
572 SvREFCNT_dec (AvARRAY (padlist)[0]);
573
574 AvFILLp (padlist) = -1;
230 SvREFCNT_dec ((SV*)padlist); 575 SvREFCNT_dec ((SV*)padlist);
231 } 576 }
232} 577}
233 578
234static int 579static int
235coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 580coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
236{ 581{
237 AV *padlist; 582 AV *padlist;
238 AV *av = (AV *)mg->mg_obj; 583 AV *av = (AV *)mg->mg_obj;
239 584
585 /* perl manages to free our internal AV and _then_ call us */
586 if (IN_DESTRUCT)
587 return 0;
588
240 /* casting is fun. */ 589 /* casting is fun. */
241 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 590 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
242 free_padlist (padlist); 591 free_padlist (aTHX_ padlist);
243 592
244 SvREFCNT_dec (av); 593 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
245 594
246 return 0; 595 return 0;
247} 596}
248 597
249#define PERL_MAGIC_coro PERL_MAGIC_ext 598static MGVTBL coro_cv_vtbl = {
250 599 0, 0, 0, 0,
251static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 600 coro_cv_free
252 601};
253#define CORO_MAGIC(cv) \
254 SvMAGIC (cv) \
255 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
256 ? SvMAGIC (cv) \
257 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
258 : 0
259 602
260/* the next two functions merely cache the padlists */ 603/* the next two functions merely cache the padlists */
261static void 604ecb_inline void
262get_padlist (CV *cv) 605get_padlist (pTHX_ CV *cv)
263{ 606{
264 MAGIC *mg = CORO_MAGIC (cv); 607 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 608 AV *av;
266 609
267 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 610 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
268 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 611 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
269 else 612 else
270 { 613 {
271#if PREFER_PERL_FUNCTIONS 614#if CORO_PREFER_PERL_FUNCTIONS
272 /* this is probably cleaner, but also slower? */ 615 /* this is probably cleaner? but also slower! */
616 /* in practise, it seems to be less stable */
273 CV *cp = Perl_cv_clone (cv); 617 CV *cp = Perl_cv_clone (aTHX_ cv);
274 CvPADLIST (cv) = CvPADLIST (cp); 618 CvPADLIST (cv) = CvPADLIST (cp);
275 CvPADLIST (cp) = 0; 619 CvPADLIST (cp) = 0;
276 SvREFCNT_dec (cp); 620 SvREFCNT_dec (cp);
277#else 621#else
278 CvPADLIST (cv) = coro_clone_padlist (cv); 622 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
279#endif 623#endif
280 } 624 }
281} 625}
282 626
283static void 627ecb_inline void
284put_padlist (CV *cv) 628put_padlist (pTHX_ CV *cv)
285{ 629{
286 MAGIC *mg = CORO_MAGIC (cv); 630 MAGIC *mg = CORO_MAGIC_cv (cv);
287 AV *av; 631 AV *av;
288 632
289 if (!mg) 633 if (ecb_expect_false (!mg))
290 { 634 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
291 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
292 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
293 mg->mg_virtual = &vtbl_coro;
294 mg->mg_obj = (SV *)newAV ();
295 }
296 635
297 av = (AV *)mg->mg_obj; 636 av = (AV *)mg->mg_obj;
298 637
299 if (AvFILLp (av) >= AvMAX (av)) 638 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
300 av_extend (av, AvMAX (av) + 1); 639 av_extend (av, AvFILLp (av) + 1);
301 640
302 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 641 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
303} 642}
304 643
305#define SB do { 644/** load & save, init *******************************************************/
306#define SE } while (0)
307 645
308#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 646/* swap sv heads, at least logically */
309
310static void 647static void
648swap_svs (pTHX_ Coro__State c)
649{
650 int i;
651
652 for (i = 0; i <= AvFILLp (c->swap_sv); )
653 {
654 SV *a = AvARRAY (c->swap_sv)[i++];
655 SV *b = AvARRAY (c->swap_sv)[i++];
656
657 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
658 SV tmp;
659
660 /* swap sv_any */
661 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
662
663 /* swap sv_flags */
664 SvFLAGS (&tmp) = SvFLAGS (a);
665 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
666 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
667
668#if PERL_VERSION_ATLEAST (5,10,0)
669 /* perl 5.10 complicates this _quite_ a bit, but it also is
670 * much faster, so no quarrels here. alternatively, we could
671 * sv_upgrade to avoid this.
672 */
673 {
674 /* swap sv_u */
675 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
676
677 /* if SvANY points to the head, we need to adjust the pointers,
678 * as the pointer for a still points to b, and maybe vice versa.
679 */
680 #define svany_in_head(type) \
681 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
682
683 if (svany_in_head (SvTYPE (a)))
684 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
685
686 if (svany_in_head (SvTYPE (b)))
687 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
688 }
689#endif
690 }
691}
692
693#define SWAP_SVS(coro) \
694 if (ecb_expect_false ((coro)->swap_sv)) \
695 swap_svs (aTHX_ (coro))
696
697static void
698on_enterleave_call (pTHX_ SV *cb);
699
700static void
311load_perl (Coro__State c) 701load_perl (pTHX_ Coro__State c)
312{ 702{
313#define VAR(name,type) PL_ ## name = c->name; 703 perl_slots *slot = c->slot;
704 c->slot = 0;
705
706 PL_mainstack = c->mainstack;
707
708#if CORO_JIT
709 load_perl_slots (slot);
710#else
711 #define VARx(name,expr,type) expr = slot->name;
314# include "state.h" 712 # include "state.h"
315#undef VAR 713 #undef VARx
316 714#endif
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320 if (c->irssv)
321 {
322 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
323 SvREFCNT_dec (c->irssv);
324 else
325 {
326 REPLACE_SV (PL_rs, c->irssv);
327 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
328 sv_setsv (c->irssv_sv, PL_rs);
329 }
330 }
331 715
332 { 716 {
333 dSP; 717 dSP;
718
334 CV *cv; 719 CV *cv;
335 720
336 /* now do the ugly restore mess */ 721 /* now do the ugly restore mess */
337 while ((cv = (CV *)POPs)) 722 while (ecb_expect_true (cv = (CV *)POPs))
338 { 723 {
339 put_padlist (cv); /* mark this padlist as available */ 724 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvDEPTH (cv) = PTR2IV (POPs); 725 CvDEPTH (cv) = PTR2IV (POPs);
341 CvPADLIST (cv) = (AV *)POPs; 726 CvPADLIST (cv) = (AV *)POPs;
342 } 727 }
343 728
344 PUTBACK; 729 PUTBACK;
345 } 730 }
346}
347 731
732 slf_frame = c->slf_frame;
733 CORO_THROW = c->except;
734
735 if (ecb_expect_false (enable_times))
736 {
737 if (ecb_expect_false (!times_valid))
738 coro_times_update ();
739
740 coro_times_sub (c);
741 }
742
743 if (ecb_expect_false (c->on_enter))
744 {
745 int i;
746
747 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
748 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
749 }
750
751 SWAP_SVS (c);
752}
753
348static void 754static void
349save_perl (Coro__State c) 755save_perl (pTHX_ Coro__State c)
350{ 756{
757 SWAP_SVS (c);
758
759 if (ecb_expect_false (c->on_leave))
760 {
761 int i;
762
763 for (i = AvFILLp (c->on_leave); i >= 0; --i)
764 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
765 }
766
767 times_valid = 0;
768
769 if (ecb_expect_false (enable_times))
770 {
771 coro_times_update (); times_valid = 1;
772 coro_times_add (c);
773 }
774
775 c->except = CORO_THROW;
776 c->slf_frame = slf_frame;
777
351 { 778 {
352 dSP; 779 dSP;
353 I32 cxix = cxstack_ix; 780 I32 cxix = cxstack_ix;
354 PERL_CONTEXT *ccstk = cxstack; 781 PERL_CONTEXT *ccstk = cxstack;
355 PERL_SI *top_si = PL_curstackinfo; 782 PERL_SI *top_si = PL_curstackinfo;
… …
357 /* 784 /*
358 * the worst thing you can imagine happens first - we have to save 785 * the worst thing you can imagine happens first - we have to save
359 * (and reinitialize) all cv's in the whole callchain :( 786 * (and reinitialize) all cv's in the whole callchain :(
360 */ 787 */
361 788
362 EXTEND (SP, 3 + 1);
363 PUSHs (Nullsv); 789 XPUSHs (Nullsv);
364 /* this loop was inspired by pp_caller */ 790 /* this loop was inspired by pp_caller */
365 for (;;) 791 for (;;)
366 { 792 {
367 while (cxix >= 0) 793 while (ecb_expect_true (cxix >= 0))
368 { 794 {
369 PERL_CONTEXT *cx = &ccstk[cxix--]; 795 PERL_CONTEXT *cx = &ccstk[cxix--];
370 796
371 if (CxTYPE (cx) == CXt_SUB) 797 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
372 { 798 {
373 CV *cv = cx->blk_sub.cv; 799 CV *cv = cx->blk_sub.cv;
374 800
375 if (CvDEPTH (cv)) 801 if (ecb_expect_true (CvDEPTH (cv)))
376 { 802 {
377 EXTEND (SP, 3); 803 EXTEND (SP, 3);
378 PUSHs ((SV *)CvPADLIST (cv)); 804 PUSHs ((SV *)CvPADLIST (cv));
379 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 805 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
380 PUSHs ((SV *)cv); 806 PUSHs ((SV *)cv);
381 807
382 CvDEPTH (cv) = 0; 808 CvDEPTH (cv) = 0;
383 get_padlist (cv); 809 get_padlist (aTHX_ cv);
384 } 810 }
385 } 811 }
386 } 812 }
387 813
388 if (top_si->si_type == PERLSI_MAIN) 814 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 815 break;
390 816
391 top_si = top_si->si_prev; 817 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 818 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 819 cxix = top_si->si_cxix;
394 } 820 }
395 821
396 PUTBACK; 822 PUTBACK;
397 } 823 }
398 824
399 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 825 /* allocate some space on the context stack for our purposes */
400 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 826 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
401 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 827 {
402 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 828 unsigned int i;
403 829
404#define VAR(name,type)c->name = PL_ ## name; 830 for (i = 0; i < SLOT_COUNT; ++i)
831 CXINC;
832
833 cxstack_ix -= SLOT_COUNT; /* undo allocation */
834 }
835
836 c->mainstack = PL_mainstack;
837
838 {
839 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
840
841#if CORO_JIT
842 save_perl_slots (slot);
843#else
844 #define VARx(name,expr,type) slot->name = expr;
405# include "state.h" 845 # include "state.h"
406#undef VAR 846 #undef VARx
847#endif
848 }
407} 849}
408 850
409/* 851/*
410 * allocate various perl stacks. This is an exact copy 852 * allocate various perl stacks. This is almost an exact copy
411 * of perl.c:init_stacks, except that it uses less memory 853 * of perl.c:init_stacks, except that it uses less memory
412 * on the (sometimes correct) assumption that coroutines do 854 * on the (sometimes correct) assumption that coroutines do
413 * not usually need a lot of stackspace. 855 * not usually need a lot of stackspace.
414 */ 856 */
415#if PREFER_PERL_FUNCTIONS 857#if CORO_PREFER_PERL_FUNCTIONS
416# define coro_init_stacks init_stacks 858# define coro_init_stacks(thx) init_stacks ()
417#else 859#else
418static void 860static void
419coro_init_stacks () 861coro_init_stacks (pTHX)
420{ 862{
421 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 863 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
422 PL_curstackinfo->si_type = PERLSI_MAIN; 864 PL_curstackinfo->si_type = PERLSI_MAIN;
423 PL_curstack = PL_curstackinfo->si_stack; 865 PL_curstack = PL_curstackinfo->si_stack;
424 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 866 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
425 867
426 PL_stack_base = AvARRAY(PL_curstack); 868 PL_stack_base = AvARRAY(PL_curstack);
427 PL_stack_sp = PL_stack_base; 869 PL_stack_sp = PL_stack_base;
428 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 870 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
429 871
430 New(50,PL_tmps_stack,128,SV*); 872 New(50,PL_tmps_stack,32,SV*);
431 PL_tmps_floor = -1; 873 PL_tmps_floor = -1;
432 PL_tmps_ix = -1; 874 PL_tmps_ix = -1;
433 PL_tmps_max = 128; 875 PL_tmps_max = 32;
434 876
435 New(54,PL_markstack,32,I32); 877 New(54,PL_markstack,16,I32);
436 PL_markstack_ptr = PL_markstack; 878 PL_markstack_ptr = PL_markstack;
437 PL_markstack_max = PL_markstack + 32; 879 PL_markstack_max = PL_markstack + 16;
438 880
439#ifdef SET_MARK_OFFSET 881#ifdef SET_MARK_OFFSET
440 SET_MARK_OFFSET; 882 SET_MARK_OFFSET;
441#endif 883#endif
442 884
443 New(54,PL_scopestack,32,I32); 885 New(54,PL_scopestack,8,I32);
444 PL_scopestack_ix = 0; 886 PL_scopestack_ix = 0;
445 PL_scopestack_max = 32; 887 PL_scopestack_max = 8;
888#if HAS_SCOPESTACK_NAME
889 New(54,PL_scopestack_name,8,const char*);
890#endif
446 891
447 New(54,PL_savestack,64,ANY); 892 New(54,PL_savestack,24,ANY);
448 PL_savestack_ix = 0; 893 PL_savestack_ix = 0;
449 PL_savestack_max = 64; 894 PL_savestack_max = 24;
450 895
451#if !PERL_VERSION_ATLEAST (5,9,0) 896#if !PERL_VERSION_ATLEAST (5,10,0)
452 New(54,PL_retstack,16,OP*); 897 New(54,PL_retstack,4,OP*);
453 PL_retstack_ix = 0; 898 PL_retstack_ix = 0;
454 PL_retstack_max = 16; 899 PL_retstack_max = 4;
455#endif 900#endif
456} 901}
457#endif 902#endif
458 903
459/* 904/*
460 * destroy the stacks, the callchain etc... 905 * destroy the stacks, the callchain etc...
461 */ 906 */
462static void 907static void
463coro_destroy_stacks () 908coro_destruct_stacks (pTHX)
464{ 909{
465 if (!IN_DESTRUCT)
466 {
467 /* restore all saved variables and stuff */
468 LEAVE_SCOPE (0);
469 assert (PL_tmps_floor == -1);
470
471 /* free all temporaries */
472 FREETMPS;
473 assert (PL_tmps_ix == -1);
474
475 POPSTACK_TO (PL_mainstack);
476 }
477
478 while (PL_curstackinfo->si_next) 910 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 911 PL_curstackinfo = PL_curstackinfo->si_next;
480 912
481 while (PL_curstackinfo) 913 while (PL_curstackinfo)
482 { 914 {
… …
491 } 923 }
492 924
493 Safefree (PL_tmps_stack); 925 Safefree (PL_tmps_stack);
494 Safefree (PL_markstack); 926 Safefree (PL_markstack);
495 Safefree (PL_scopestack); 927 Safefree (PL_scopestack);
928#if HAS_SCOPESTACK_NAME
929 Safefree (PL_scopestack_name);
930#endif
496 Safefree (PL_savestack); 931 Safefree (PL_savestack);
497#if !PERL_VERSION_ATLEAST (5,9,0) 932#if !PERL_VERSION_ATLEAST (5,10,0)
498 Safefree (PL_retstack); 933 Safefree (PL_retstack);
499#endif 934#endif
500} 935}
501 936
937#define CORO_RSS \
938 rss += sizeof (SYM (curstackinfo)); \
939 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
940 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
941 rss += SYM (tmps_max) * sizeof (SV *); \
942 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
943 rss += SYM (scopestack_max) * sizeof (I32); \
944 rss += SYM (savestack_max) * sizeof (ANY);
945
946static size_t
947coro_rss (pTHX_ struct coro *coro)
948{
949 size_t rss = sizeof (*coro);
950
951 if (coro->mainstack)
952 {
953 if (coro->flags & CF_RUNNING)
954 {
955 #define SYM(sym) PL_ ## sym
956 CORO_RSS;
957 #undef SYM
958 }
959 else
960 {
961 #define SYM(sym) coro->slot->sym
962 CORO_RSS;
963 #undef SYM
964 }
965 }
966
967 return rss;
968}
969
970/** coroutine stack handling ************************************************/
971
972static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
973static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
974static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
975
976/* apparently < 5.8.8 */
977#ifndef MgPV_nolen_const
978#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
979 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
980 (const char*)(mg)->mg_ptr)
981#endif
982
983/*
984 * This overrides the default magic get method of %SIG elements.
985 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
986 * and instead of trying to save and restore the hash elements (extremely slow),
987 * we just provide our own readback here.
988 */
989static int ecb_cold
990coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
991{
992 const char *s = MgPV_nolen_const (mg);
993
994 if (*s == '_')
995 {
996 SV **svp = 0;
997
998 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
999 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1000
1001 if (svp)
1002 {
1003 SV *ssv;
1004
1005 if (!*svp)
1006 ssv = &PL_sv_undef;
1007 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1008 ssv = sv_2mortal (newRV_inc (*svp));
1009 else
1010 ssv = *svp;
1011
1012 sv_setsv (sv, ssv);
1013 return 0;
1014 }
1015 }
1016
1017 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1018}
1019
1020static int ecb_cold
1021coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1022{
1023 const char *s = MgPV_nolen_const (mg);
1024
1025 if (*s == '_')
1026 {
1027 SV **svp = 0;
1028
1029 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1030 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1031
1032 if (svp)
1033 {
1034 SV *old = *svp;
1035 *svp = 0;
1036 SvREFCNT_dec (old);
1037 return 0;
1038 }
1039 }
1040
1041 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1042}
1043
1044static int ecb_cold
1045coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1046{
1047 const char *s = MgPV_nolen_const (mg);
1048
1049 if (*s == '_')
1050 {
1051 SV **svp = 0;
1052
1053 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1054 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1055
1056 if (svp)
1057 {
1058 SV *old = *svp;
1059 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1060 SvREFCNT_dec (old);
1061 return 0;
1062 }
1063 }
1064
1065 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1066}
1067
1068static void
1069prepare_nop (pTHX_ struct coro_transfer_args *ta)
1070{
1071 /* kind of mega-hacky, but works */
1072 ta->next = ta->prev = (struct coro *)ta;
1073}
1074
502static void 1075static int
503setup_coro (struct coro *coro) 1076slf_check_nop (pTHX_ struct CoroSLF *frame)
1077{
1078 return 0;
1079}
1080
1081static int
1082slf_check_repeat (pTHX_ struct CoroSLF *frame)
1083{
1084 return 1;
1085}
1086
1087static UNOP init_perl_op;
1088
1089ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1090init_perl (pTHX_ struct coro *coro)
504{ 1091{
505 /* 1092 /*
506 * emulate part of the perl startup here. 1093 * emulate part of the perl startup here.
507 */ 1094 */
508
509 coro_init_stacks (); 1095 coro_init_stacks (aTHX);
510 1096
1097 PL_runops = RUNOPS_DEFAULT;
511 PL_curcop = &PL_compiling; 1098 PL_curcop = &PL_compiling;
512 PL_in_eval = EVAL_NULL; 1099 PL_in_eval = EVAL_NULL;
1100 PL_comppad = 0;
1101 PL_comppad_name = 0;
1102 PL_comppad_name_fill = 0;
1103 PL_comppad_name_floor = 0;
513 PL_curpm = 0; 1104 PL_curpm = 0;
1105 PL_curpad = 0;
514 PL_localizing = 0; 1106 PL_localizing = 0;
515 PL_dirty = 0;
516 PL_restartop = 0; 1107 PL_restartop = 0;
1108#if PERL_VERSION_ATLEAST (5,10,0)
1109 PL_parser = 0;
1110#endif
1111 PL_hints = 0;
1112
1113 /* recreate the die/warn hooks */
1114 PL_diehook = SvREFCNT_inc (rv_diehook);
1115 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1116
1117 GvSV (PL_defgv) = newSV (0);
1118 GvAV (PL_defgv) = coro->args; coro->args = 0;
1119 GvSV (PL_errgv) = newSV (0);
1120 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1121 GvHV (PL_hintgv) = 0;
1122 PL_rs = newSVsv (GvSV (irsgv));
1123 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
517 1124
518 { 1125 {
519 dSP; 1126 dSP;
520 LOGOP myop; 1127 UNOP myop;
521 1128
522 SvREFCNT_dec (GvAV (PL_defgv));
523 GvAV (PL_defgv) = coro->args; coro->args = 0;
524
525 Zero (&myop, 1, LOGOP); 1129 Zero (&myop, 1, UNOP);
526 myop.op_next = Nullop; 1130 myop.op_next = Nullop;
1131 myop.op_type = OP_ENTERSUB;
527 myop.op_flags = OPf_WANT_VOID; 1132 myop.op_flags = OPf_WANT_VOID;
528 1133
529 PUSHMARK (SP); 1134 PUSHMARK (SP);
530 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1135 PUSHs ((SV *)coro->startcv);
531 PUTBACK; 1136 PUTBACK;
532 PL_op = (OP *)&myop; 1137 PL_op = (OP *)&myop;
533 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1138 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
534 SPAGAIN;
535 } 1139 }
536 1140
537 ENTER; /* necessary e.g. for dounwind */ 1141 /* this newly created coroutine might be run on an existing cctx which most
538} 1142 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1143 */
1144 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1145 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1146 slf_frame.destroy = 0;
539 1147
1148 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1149 init_perl_op.op_next = PL_op;
1150 init_perl_op.op_type = OP_ENTERSUB;
1151 init_perl_op.op_ppaddr = pp_slf;
1152 /* no flags etc. required, as an init function won't be called */
1153
1154 PL_op = (OP *)&init_perl_op;
1155
1156 /* copy throw, in case it was set before init_perl */
1157 CORO_THROW = coro->except;
1158
1159 SWAP_SVS (coro);
1160
1161 if (ecb_expect_false (enable_times))
1162 {
1163 coro_times_update ();
1164 coro_times_sub (coro);
1165 }
1166}
1167
540static void 1168static void
1169coro_unwind_stacks (pTHX)
1170{
1171 if (!IN_DESTRUCT)
1172 {
1173 /* restore all saved variables and stuff */
1174 LEAVE_SCOPE (0);
1175 assert (PL_tmps_floor == -1);
1176
1177 /* free all temporaries */
1178 FREETMPS;
1179 assert (PL_tmps_ix == -1);
1180
1181 /* unwind all extra stacks */
1182 POPSTACK_TO (PL_mainstack);
1183
1184 /* unwind main stack */
1185 dounwind (-1);
1186 }
1187}
1188
1189static void
1190destroy_perl (pTHX_ struct coro *coro)
1191{
1192 SV *svf [9];
1193
1194 {
1195 SV *old_current = SvRV (coro_current);
1196 struct coro *current = SvSTATE (old_current);
1197
1198 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1199
1200 save_perl (aTHX_ current);
1201
1202 /* this will cause transfer_check to croak on block*/
1203 SvRV_set (coro_current, (SV *)coro->hv);
1204
1205 load_perl (aTHX_ coro);
1206
1207 coro_unwind_stacks (aTHX);
1208
1209 /* restore swapped sv's */
1210 SWAP_SVS (coro);
1211
1212 coro_destruct_stacks (aTHX);
1213
1214 /* now save some sv's to be free'd later */
1215 svf [0] = GvSV (PL_defgv);
1216 svf [1] = (SV *)GvAV (PL_defgv);
1217 svf [2] = GvSV (PL_errgv);
1218 svf [3] = (SV *)PL_defoutgv;
1219 svf [4] = PL_rs;
1220 svf [5] = GvSV (irsgv);
1221 svf [6] = (SV *)GvHV (PL_hintgv);
1222 svf [7] = PL_diehook;
1223 svf [8] = PL_warnhook;
1224 assert (9 == sizeof (svf) / sizeof (*svf));
1225
1226 SvRV_set (coro_current, old_current);
1227
1228 load_perl (aTHX_ current);
1229 }
1230
1231 {
1232 unsigned int i;
1233
1234 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1235 SvREFCNT_dec (svf [i]);
1236
1237 SvREFCNT_dec (coro->saved_deffh);
1238 SvREFCNT_dec (coro->rouse_cb);
1239 SvREFCNT_dec (coro->invoke_cb);
1240 SvREFCNT_dec (coro->invoke_av);
1241 }
1242}
1243
1244ecb_inline void
541free_coro_mortal () 1245free_coro_mortal (pTHX)
542{ 1246{
543 if (coro_mortal) 1247 if (ecb_expect_true (coro_mortal))
544 { 1248 {
545 SvREFCNT_dec (coro_mortal); 1249 SvREFCNT_dec ((SV *)coro_mortal);
546 coro_mortal = 0; 1250 coro_mortal = 0;
547 } 1251 }
548} 1252}
549 1253
550/* inject a fake call to Coro::State::_cctx_init into the execution */
551static void NOINLINE
552prepare_cctx (coro_cctx *cctx)
553{
554 dSP;
555 LOGOP myop;
556
557 Zero (&myop, 1, LOGOP);
558 myop.op_next = PL_op;
559 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560
561 PUSHMARK (SP);
562 EXTEND (SP, 2);
563 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
564 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
565 PUTBACK;
566 PL_op = (OP *)&myop;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN;
569}
570
571static void 1254static int
572coro_run (void *arg) 1255runops_trace (pTHX)
573{ 1256{
574 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1257 COP *oldcop = 0;
575 UNLOCK; 1258 int oldcxix = -2;
576 1259
577 /* 1260 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
578 * this is a _very_ stripped down perl interpreter ;) 1261 {
579 */ 1262 PERL_ASYNC_CHECK ();
1263
1264 if (cctx_current->flags & CC_TRACE_ALL)
1265 {
1266 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1267 {
1268 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1269 SV **bot, **top;
1270 AV *av = newAV (); /* return values */
1271 SV **cb;
1272 dSP;
1273
1274 GV *gv = CvGV (cx->blk_sub.cv);
1275 SV *fullname = sv_2mortal (newSV (0));
1276 if (isGV (gv))
1277 gv_efullname3 (fullname, gv, 0);
1278
1279 bot = PL_stack_base + cx->blk_oldsp + 1;
1280 top = cx->blk_gimme == G_ARRAY ? SP + 1
1281 : cx->blk_gimme == G_SCALAR ? bot + 1
1282 : bot;
1283
1284 av_extend (av, top - bot);
1285 while (bot < top)
1286 av_push (av, SvREFCNT_inc_NN (*bot++));
1287
1288 PL_runops = RUNOPS_DEFAULT;
1289 ENTER;
1290 SAVETMPS;
1291 EXTEND (SP, 3);
1292 PUSHMARK (SP);
1293 PUSHs (&PL_sv_no);
1294 PUSHs (fullname);
1295 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1296 PUTBACK;
1297 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1298 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1299 SPAGAIN;
1300 FREETMPS;
1301 LEAVE;
1302 PL_runops = runops_trace;
1303 }
1304
1305 if (oldcop != PL_curcop)
1306 {
1307 oldcop = PL_curcop;
1308
1309 if (PL_curcop != &PL_compiling)
1310 {
1311 SV **cb;
1312
1313 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1314 {
1315 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1316
1317 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1318 {
1319 dSP;
1320 GV *gv = CvGV (cx->blk_sub.cv);
1321 SV *fullname = sv_2mortal (newSV (0));
1322
1323 if (isGV (gv))
1324 gv_efullname3 (fullname, gv, 0);
1325
1326 PL_runops = RUNOPS_DEFAULT;
1327 ENTER;
1328 SAVETMPS;
1329 EXTEND (SP, 3);
1330 PUSHMARK (SP);
1331 PUSHs (&PL_sv_yes);
1332 PUSHs (fullname);
1333 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1334 PUTBACK;
1335 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1336 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1337 SPAGAIN;
1338 FREETMPS;
1339 LEAVE;
1340 PL_runops = runops_trace;
1341 }
1342
1343 oldcxix = cxstack_ix;
1344 }
1345
1346 if (cctx_current->flags & CC_TRACE_LINE)
1347 {
1348 dSP;
1349
1350 PL_runops = RUNOPS_DEFAULT;
1351 ENTER;
1352 SAVETMPS;
1353 EXTEND (SP, 3);
1354 PL_runops = RUNOPS_DEFAULT;
1355 PUSHMARK (SP);
1356 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1357 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1358 PUTBACK;
1359 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1360 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1361 SPAGAIN;
1362 FREETMPS;
1363 LEAVE;
1364 PL_runops = runops_trace;
1365 }
1366 }
1367 }
1368 }
1369 }
1370
1371 TAINT_NOT;
1372 return 0;
1373}
1374
1375static struct CoroSLF cctx_ssl_frame;
1376
1377static void
1378slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1379{
1380 ta->prev = 0;
1381}
1382
1383static int
1384slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1385{
1386 *frame = cctx_ssl_frame;
1387
1388 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1389}
1390
1391/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1392static void ecb_noinline
1393cctx_prepare (pTHX)
1394{
580 PL_top_env = &PL_start_env; 1395 PL_top_env = &PL_start_env;
581 1396
1397 if (cctx_current->flags & CC_TRACE)
1398 PL_runops = runops_trace;
1399
1400 /* we already must be executing an SLF op, there is no other valid way
1401 * that can lead to creation of a new cctx */
1402 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1403 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1404
1405 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1406 cctx_ssl_frame = slf_frame;
1407
1408 slf_frame.prepare = slf_prepare_set_stacklevel;
1409 slf_frame.check = slf_check_set_stacklevel;
1410}
1411
1412/* the tail of transfer: execute stuff we can only do after a transfer */
1413ecb_inline void
1414transfer_tail (pTHX)
1415{
1416 free_coro_mortal (aTHX);
1417}
1418
1419/*
1420 * this is a _very_ stripped down perl interpreter ;)
1421 */
1422static void
1423cctx_run (void *arg)
1424{
1425#ifdef USE_ITHREADS
1426# if CORO_PTHREAD
1427 PERL_SET_CONTEXT (coro_thx);
1428# endif
1429#endif
1430 {
1431 dTHX;
1432
1433 /* normally we would need to skip the entersub here */
1434 /* not doing so will re-execute it, which is exactly what we want */
1435 /* PL_nop = PL_nop->op_next */
1436
582 /* inject call to cctx_init */ 1437 /* inject a fake subroutine call to cctx_init */
583 prepare_cctx ((coro_cctx *)arg); 1438 cctx_prepare (aTHX);
584 1439
1440 /* cctx_run is the alternative tail of transfer() */
1441 transfer_tail (aTHX);
1442
585 /* somebody will hit me for both perl_run and PL_restartop */ 1443 /* somebody or something will hit me for both perl_run and PL_restartop */
586 PL_restartop = PL_op; 1444 PL_restartop = PL_op;
587 perl_run (PL_curinterp); 1445 perl_run (PL_curinterp);
1446 /*
1447 * Unfortunately, there is no way to get at the return values of the
1448 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1449 * runtime errors here, as this is just a random interpreter, not a thread.
1450 */
588 1451
589 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1452 /*
590 abort (); 1453 * If perl-run returns we assume exit() was being called or the coro
1454 * fell off the end, which seems to be the only valid (non-bug)
1455 * reason for perl_run to return. We try to exit by jumping to the
1456 * bootstrap-time "top" top_env, as we cannot restore the "main"
1457 * coroutine as Coro has no such concept.
1458 * This actually isn't valid with the pthread backend, but OSes requiring
1459 * that backend are too broken to do it in a standards-compliant way.
1460 */
1461 PL_top_env = main_top_env;
1462 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1463 }
591} 1464}
592 1465
593static coro_cctx * 1466static coro_cctx *
594cctx_new () 1467cctx_new (void)
595{ 1468{
596 coro_cctx *cctx; 1469 coro_cctx *cctx;
597 1470
598 ++cctx_count; 1471 ++cctx_count;
599
600 Newz (0, cctx, 1, coro_cctx); 1472 New (0, cctx, 1, coro_cctx);
1473
1474 cctx->gen = cctx_gen;
1475 cctx->flags = 0;
1476 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1477
1478 return cctx;
1479}
1480
1481/* create a new cctx only suitable as source */
1482static coro_cctx *
1483cctx_new_empty (void)
1484{
1485 coro_cctx *cctx = cctx_new ();
1486
1487 cctx->sptr = 0;
1488 coro_create (&cctx->cctx, 0, 0, 0, 0);
1489
1490 return cctx;
1491}
1492
1493/* create a new cctx suitable as destination/running a perl interpreter */
1494static coro_cctx *
1495cctx_new_run (void)
1496{
1497 coro_cctx *cctx = cctx_new ();
1498 void *stack_start;
1499 size_t stack_size;
601 1500
602#if HAVE_MMAP 1501#if HAVE_MMAP
603
604 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1502 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
605 /* mmap supposedly does allocate-on-write for us */ 1503 /* mmap supposedly does allocate-on-write for us */
606 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1504 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
607 1505
608 if (cctx->sptr == (void *)-1) 1506 if (cctx->sptr != (void *)-1)
1507 {
1508 #if CORO_STACKGUARD
1509 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1510 #endif
1511 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1512 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1513 cctx->flags |= CC_MAPPED;
609 { 1514 }
1515 else
1516#endif
1517 {
1518 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1519 New (0, cctx->sptr, cctx_stacksize, long);
1520
1521 if (!cctx->sptr)
1522 {
610 perror ("FATAL: unable to mmap stack for coroutine"); 1523 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
611 _exit (EXIT_FAILURE); 1524 _exit (EXIT_FAILURE);
612 } 1525 }
613 1526
614# if STACKGUARD 1527 stack_start = cctx->sptr;
615 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1528 stack_size = cctx->ssize;
616# endif
617
618#else
619
620 cctx->ssize = STACKSIZE * (long)sizeof (long);
621 New (0, cctx->sptr, STACKSIZE, long);
622
623 if (!cctx->sptr)
624 { 1529 }
625 perror ("FATAL: unable to malloc stack for coroutine");
626 _exit (EXIT_FAILURE);
627 }
628 1530
1531 #if CORO_USE_VALGRIND
1532 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
629#endif 1533 #endif
630 1534
631#if USE_VALGRIND 1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
632 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
633 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
634 cctx->ssize + (char *)cctx->sptr
635 );
636#endif
637
638 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
639 1536
640 return cctx; 1537 return cctx;
641} 1538}
642 1539
643static void 1540static void
644cctx_destroy (coro_cctx *cctx) 1541cctx_destroy (coro_cctx *cctx)
645{ 1542{
646 if (!cctx) 1543 if (!cctx)
647 return; 1544 return;
648 1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
649 --cctx_count; 1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
650 1550
651#if USE_VALGRIND 1551 /* coro_transfer creates new, empty cctx's */
1552 if (cctx->sptr)
1553 {
1554 #if CORO_USE_VALGRIND
652 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1555 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
653#endif 1556 #endif
654 1557
655#if HAVE_MMAP 1558#if HAVE_MMAP
1559 if (cctx->flags & CC_MAPPED)
656 munmap (cctx->sptr, cctx->ssize); 1560 munmap (cctx->sptr, cctx->ssize);
657#else 1561 else
1562#endif
658 Safefree (cctx->sptr); 1563 Safefree (cctx->sptr);
659#endif 1564 }
660 1565
661 Safefree (cctx); 1566 Safefree (cctx);
662} 1567}
663 1568
1569/* wether this cctx should be destructed */
1570#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1571
664static coro_cctx * 1572static coro_cctx *
665cctx_get () 1573cctx_get (pTHX)
666{ 1574{
667 coro_cctx *cctx; 1575 while (ecb_expect_true (cctx_first))
668
669 if (cctx_first)
670 { 1576 {
671 cctx = cctx_first; 1577 coro_cctx *cctx = cctx_first;
672 cctx_first = cctx->next; 1578 cctx_first = cctx->next;
673 --cctx_idle; 1579 --cctx_idle;
674 } 1580
675 else 1581 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
676 { 1582 return cctx;
677 cctx = cctx_new (); 1583
678 PL_op = PL_op->op_next; 1584 cctx_destroy (cctx);
679 } 1585 }
680 1586
681 return cctx; 1587 return cctx_new_run ();
682} 1588}
683 1589
684static void 1590static void
685cctx_put (coro_cctx *cctx) 1591cctx_put (coro_cctx *cctx)
686{ 1592{
1593 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1594
687 /* free another cctx if overlimit */ 1595 /* free another cctx if overlimit */
688 if (cctx_idle >= MAX_IDLE_CCTX) 1596 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
689 { 1597 {
690 coro_cctx *first = cctx_first; 1598 coro_cctx *first = cctx_first;
691 cctx_first = first->next; 1599 cctx_first = first->next;
692 --cctx_idle; 1600 --cctx_idle;
693 1601
694 assert (!first->inuse);
695 cctx_destroy (first); 1602 cctx_destroy (first);
696 } 1603 }
697 1604
698 ++cctx_idle; 1605 ++cctx_idle;
699 cctx->next = cctx_first; 1606 cctx->next = cctx_first;
700 cctx_first = cctx; 1607 cctx_first = cctx;
701} 1608}
702 1609
703/* never call directly, always through the coro_state_transfer global variable */ 1610/** coroutine switching *****************************************************/
704static void NOINLINE 1611
1612static void
705transfer (struct coro *prev, struct coro *next) 1613transfer_check (pTHX_ struct coro *prev, struct coro *next)
1614{
1615 /* TODO: throwing up here is considered harmful */
1616
1617 if (ecb_expect_true (prev != next))
1618 {
1619 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1620 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1621
1622 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1623 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1624
1625#if !PERL_VERSION_ATLEAST (5,10,0)
1626 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1627 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1628#endif
1629 }
1630}
1631
1632/* always use the TRANSFER macro */
1633static void ecb_noinline /* noinline so we have a fixed stackframe */
1634transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
706{ 1635{
707 dSTACKLEVEL; 1636 dSTACKLEVEL;
708 1637
709 /* sometimes transfer is only called to set idle_sp */ 1638 /* sometimes transfer is only called to set idle_sp */
710 if (!next) 1639 if (ecb_expect_false (!prev))
711 { 1640 {
712 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1641 cctx_current->idle_sp = STACKLEVEL;
713 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1642 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
714 }
715 else if (prev != next)
716 { 1643 }
1644 else if (ecb_expect_true (prev != next))
1645 {
717 coro_cctx *prev__cctx; 1646 coro_cctx *cctx_prev;
718 1647
719 if (prev->flags & CF_NEW) 1648 if (ecb_expect_false (prev->flags & CF_NEW))
720 { 1649 {
721 /* create a new empty context */ 1650 /* create a new empty/source context */
722 Newz (0, prev->cctx, 1, coro_cctx);
723 prev->cctx->inuse = 1;
724 prev->flags &= ~CF_NEW; 1651 prev->flags &= ~CF_NEW;
725 prev->flags |= CF_RUNNING; 1652 prev->flags |= CF_RUNNING;
726 } 1653 }
727 1654
728 /*TODO: must not croak here */
729 if (!prev->flags & CF_RUNNING)
730 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
731
732 if (next->flags & CF_RUNNING)
733 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
734
735 prev->flags &= ~CF_RUNNING; 1655 prev->flags &= ~CF_RUNNING;
736 next->flags |= CF_RUNNING; 1656 next->flags |= CF_RUNNING;
737 1657
738 LOCK; 1658 /* first get rid of the old state */
1659 save_perl (aTHX_ prev);
739 1660
740 if (next->flags & CF_NEW) 1661 if (ecb_expect_false (next->flags & CF_NEW))
741 { 1662 {
742 /* need to start coroutine */ 1663 /* need to start coroutine */
743 next->flags &= ~CF_NEW; 1664 next->flags &= ~CF_NEW;
744 /* first get rid of the old state */
745 save_perl (prev);
746 /* setup coroutine call */ 1665 /* setup coroutine call */
747 setup_coro (next); 1666 init_perl (aTHX_ next);
748 /* need a new stack */
749 assert (!next->cctx);
750 } 1667 }
751 else 1668 else
1669 load_perl (aTHX_ next);
1670
1671 /* possibly untie and reuse the cctx */
1672 if (ecb_expect_true (
1673 cctx_current->idle_sp == STACKLEVEL
1674 && !(cctx_current->flags & CC_TRACE)
1675 && !force_cctx
1676 ))
752 { 1677 {
753 /* coroutine already started */ 1678 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
754 save_perl (prev); 1679 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
755 load_perl (next); 1680
1681 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1682 /* without this the next cctx_get might destroy the running cctx while still in use */
1683 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1684 if (ecb_expect_true (!next->cctx))
1685 next->cctx = cctx_get (aTHX);
1686
1687 cctx_put (cctx_current);
756 } 1688 }
1689 else
1690 prev->cctx = cctx_current;
757 1691
758 prev__cctx = prev->cctx; 1692 ++next->usecount;
759 1693
760 /* possibly "free" the cctx */ 1694 cctx_prev = cctx_current;
761 if (prev__cctx->idle_sp == STACKLEVEL) 1695 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1696
1697 next->cctx = 0;
1698
1699 if (ecb_expect_false (cctx_prev != cctx_current))
762 { 1700 {
763 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1701 cctx_prev->top_env = PL_top_env;
764 assert (PL_top_env == prev__cctx->top_env); 1702 PL_top_env = cctx_current->top_env;
765 1703 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
766 prev->cctx = 0;
767
768 cctx_put (prev__cctx);
769 prev__cctx->inuse = 0;
770 } 1704 }
771 1705
772 if (!next->cctx) 1706 transfer_tail (aTHX);
773 {
774 next->cctx = cctx_get ();
775 assert (!next->cctx->inuse);
776 next->cctx->inuse = 1;
777 }
778
779 if (prev__cctx != next->cctx)
780 {
781 prev__cctx->top_env = PL_top_env;
782 PL_top_env = next->cctx->top_env;
783 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
784 }
785
786 free_coro_mortal ();
787
788 UNLOCK;
789 } 1707 }
790} 1708}
791 1709
792struct transfer_args 1710#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
793{
794 struct coro *prev, *next;
795};
796
797#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1711#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
798 1712
1713/** high level stuff ********************************************************/
1714
1715/* this function is actually Coro, not Coro::State, but we call it from here */
1716/* because it is convenient - but it hasn't been declared yet for that reason */
799static void 1717static void
1718coro_call_on_destroy (pTHX_ struct coro *coro);
1719
1720static void
800coro_state_destroy (struct coro *coro) 1721coro_state_destroy (pTHX_ struct coro *coro)
801{ 1722{
802 if (coro->refcnt--) 1723 if (coro->flags & CF_ZOMBIE)
803 return; 1724 return;
804 1725
805 if (coro->mainstack && coro->mainstack != main_mainstack) 1726 slf_destroy (aTHX_ coro);
806 {
807 struct coro temp;
808 Zero (&temp, 1, struct coro);
809 temp.save = CORO_SAVE_ALL;
810 1727
1728 coro->flags |= CF_ZOMBIE;
1729
811 if (coro->flags & CF_RUNNING) 1730 if (coro->flags & CF_READY)
812 croak ("FATAL: tried to destroy currently running coroutine");
813
814 save_perl (&temp);
815 load_perl (coro);
816
817 coro_destroy_stacks ();
818
819 load_perl (&temp); /* this will get rid of defsv etc.. */
820
821 coro->mainstack = 0;
822 } 1731 {
1732 /* reduce nready, as destroying a ready coro effectively unreadies it */
1733 /* alternative: look through all ready queues and remove the coro */
1734 --coro_nready;
1735 }
1736 else
1737 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1738
1739 if (coro->next) coro->next->prev = coro->prev;
1740 if (coro->prev) coro->prev->next = coro->next;
1741 if (coro == coro_first) coro_first = coro->next;
1742
1743 if (coro->mainstack
1744 && coro->mainstack != main_mainstack
1745 && coro->slot
1746 && !PL_dirty)
1747 destroy_perl (aTHX_ coro);
823 1748
824 cctx_destroy (coro->cctx); 1749 cctx_destroy (coro->cctx);
1750 SvREFCNT_dec (coro->startcv);
825 SvREFCNT_dec (coro->args); 1751 SvREFCNT_dec (coro->args);
826 Safefree (coro); 1752 SvREFCNT_dec (coro->swap_sv);
1753 SvREFCNT_dec (CORO_THROW);
1754
1755 coro_call_on_destroy (aTHX_ coro);
1756
1757 /* more destruction mayhem in coro_state_free */
827} 1758}
828 1759
829static int 1760static int
830coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1761coro_state_free (pTHX_ SV *sv, MAGIC *mg)
831{ 1762{
832 struct coro *coro = (struct coro *)mg->mg_ptr; 1763 struct coro *coro = (struct coro *)mg->mg_ptr;
833 mg->mg_ptr = 0; 1764 mg->mg_ptr = 0;
834 1765
835 coro_state_destroy (coro); 1766 coro_state_destroy (aTHX_ coro);
1767 SvREFCNT_dec (coro->on_destroy);
1768 SvREFCNT_dec (coro->status);
1769
1770 Safefree (coro);
836 1771
837 return 0; 1772 return 0;
838} 1773}
839 1774
840static int 1775static int ecb_cold
841coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1776coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
842{ 1777{
843 struct coro *coro = (struct coro *)mg->mg_ptr; 1778 /* called when perl clones the current process the slow way (windows process emulation) */
844 1779 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
845 ++coro->refcnt; 1780 mg->mg_ptr = 0;
1781 mg->mg_virtual = 0;
846 1782
847 return 0; 1783 return 0;
848} 1784}
849 1785
850static MGVTBL coro_state_vtbl = { 1786static MGVTBL coro_state_vtbl = {
851 0, 0, 0, 0, 1787 0, 0, 0, 0,
852 coro_state_clear, 1788 coro_state_free,
853 0, 1789 0,
854#ifdef MGf_DUP 1790#ifdef MGf_DUP
855 coro_state_dup, 1791 coro_state_dup,
856#else 1792#else
857# define MGf_DUP 0 1793# define MGf_DUP 0
858#endif 1794#endif
859}; 1795};
860 1796
861static struct coro *
862SvSTATE (SV *coro)
863{
864 HV *stash;
865 MAGIC *mg;
866
867 if (SvROK (coro))
868 coro = SvRV (coro);
869
870 stash = SvSTASH (coro);
871 if (stash != coro_stash && stash != coro_state_stash)
872 {
873 /* very slow, but rare, check */
874 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
875 croak ("Coro::State object required");
876 }
877
878 mg = SvMAGIC (coro);
879 assert (mg->mg_type == PERL_MAGIC_ext);
880 return (struct coro *)mg->mg_ptr;
881}
882
883static void 1797static void
884prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1798prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
885{ 1799{
886 ta->prev = SvSTATE (prev_sv); 1800 ta->prev = SvSTATE (prev_sv);
887 ta->next = SvSTATE (next_sv); 1801 ta->next = SvSTATE (next_sv);
1802 TRANSFER_CHECK (*ta);
888} 1803}
889 1804
890static void 1805static void
891api_transfer (SV *prev_sv, SV *next_sv) 1806api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
892{ 1807{
893 struct transfer_args ta; 1808 struct coro_transfer_args ta;
894 1809
895 prepare_transfer (&ta, prev_sv, next_sv); 1810 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
896 TRANSFER (ta); 1811 TRANSFER (ta, 1);
1812}
1813
1814/** Coro ********************************************************************/
1815
1816ecb_inline void
1817coro_enq (pTHX_ struct coro *coro)
1818{
1819 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1820
1821 SvREFCNT_inc_NN (coro->hv);
1822
1823 coro->next_ready = 0;
1824 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1825 ready [1] = coro;
1826}
1827
1828ecb_inline struct coro *
1829coro_deq (pTHX)
1830{
1831 int prio;
1832
1833 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1834 {
1835 struct coro **ready = coro_ready [prio];
1836
1837 if (ready [0])
1838 {
1839 struct coro *coro = ready [0];
1840 ready [0] = coro->next_ready;
1841 return coro;
1842 }
1843 }
1844
1845 return 0;
1846}
1847
1848static void
1849invoke_sv_ready_hook_helper (void)
1850{
1851 dTHX;
1852 dSP;
1853
1854 ENTER;
1855 SAVETMPS;
1856
1857 PUSHMARK (SP);
1858 PUTBACK;
1859 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1860
1861 FREETMPS;
1862 LEAVE;
897} 1863}
898 1864
899static int 1865static int
900api_save (SV *coro_sv, int new_save) 1866api_ready (pTHX_ SV *coro_sv)
901{ 1867{
902 struct coro *coro = SvSTATE (coro_sv); 1868 struct coro *coro = SvSTATE (coro_sv);
903 int old_save = coro->save;
904
905 if (new_save >= 0)
906 coro->save = new_save;
907
908 return old_save;
909}
910
911/** Coro ********************************************************************/
912
913#define PRIO_MAX 3
914#define PRIO_HIGH 1
915#define PRIO_NORMAL 0
916#define PRIO_LOW -1
917#define PRIO_IDLE -3
918#define PRIO_MIN -4
919
920/* for Coro.pm */
921static SV *coro_current;
922static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
923static int coro_nready;
924
925static void
926coro_enq (SV *coro_sv)
927{
928 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
929 coro_nready++;
930}
931
932static SV *
933coro_deq (int min_prio)
934{
935 int prio = PRIO_MAX - PRIO_MIN;
936
937 min_prio -= PRIO_MIN;
938 if (min_prio < 0)
939 min_prio = 0;
940
941 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
942 if (AvFILLp (coro_ready [prio]) >= 0)
943 {
944 coro_nready--;
945 return av_shift (coro_ready [prio]);
946 }
947
948 return 0;
949}
950
951static int
952api_ready (SV *coro_sv)
953{
954 struct coro *coro;
955
956 if (SvROK (coro_sv))
957 coro_sv = SvRV (coro_sv);
958
959 coro = SvSTATE (coro_sv);
960 1869
961 if (coro->flags & CF_READY) 1870 if (coro->flags & CF_READY)
962 return 0; 1871 return 0;
963 1872
964 coro->flags |= CF_READY; 1873 coro->flags |= CF_READY;
965 1874
966 LOCK; 1875 coro_enq (aTHX_ coro);
967 coro_enq (SvREFCNT_inc (coro_sv)); 1876
968 UNLOCK; 1877 if (!coro_nready++)
1878 if (coroapi.readyhook)
1879 coroapi.readyhook ();
969 1880
970 return 1; 1881 return 1;
971} 1882}
972 1883
973static int 1884static int
974api_is_ready (SV *coro_sv) 1885api_is_ready (pTHX_ SV *coro_sv)
975{ 1886{
976 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1887 return !!(SvSTATE (coro_sv)->flags & CF_READY);
977} 1888}
978 1889
1890/* expects to own a reference to next->hv */
1891ecb_inline void
1892prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1893{
1894 SV *prev_sv = SvRV (coro_current);
1895
1896 ta->prev = SvSTATE_hv (prev_sv);
1897 ta->next = next;
1898
1899 TRANSFER_CHECK (*ta);
1900
1901 SvRV_set (coro_current, (SV *)next->hv);
1902
1903 free_coro_mortal (aTHX);
1904 coro_mortal = prev_sv;
1905}
1906
979static void 1907static void
980prepare_schedule (struct transfer_args *ta) 1908prepare_schedule (pTHX_ struct coro_transfer_args *ta)
981{ 1909{
982 SV *prev, *next;
983
984 for (;;) 1910 for (;;)
985 { 1911 {
986 LOCK; 1912 struct coro *next = coro_deq (aTHX);
987 next = coro_deq (PRIO_MIN);
988 UNLOCK;
989 1913
990 if (next) 1914 if (ecb_expect_true (next))
1915 {
1916 /* cannot transfer to destroyed coros, skip and look for next */
1917 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1918 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1919 else
1920 {
1921 next->flags &= ~CF_READY;
1922 --coro_nready;
1923
1924 prepare_schedule_to (aTHX_ ta, next);
991 break; 1925 break;
1926 }
1927 }
1928 else
1929 {
1930 /* nothing to schedule: call the idle handler */
1931 if (SvROK (sv_idle)
1932 && SvOBJECT (SvRV (sv_idle)))
1933 {
1934 if (SvRV (sv_idle) == SvRV (coro_current))
1935 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1936
1937 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1938 api_ready (aTHX_ SvRV (sv_idle));
1939 --coro_nready;
1940 }
1941 else
1942 {
1943 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1944 dSP;
1945
1946 ENTER;
1947 SAVETMPS;
1948
1949 PUSHMARK (SP);
1950 PUTBACK;
1951 call_sv (sv_idle, G_VOID | G_DISCARD);
1952
1953 FREETMPS;
1954 LEAVE;
1955 }
1956 }
1957 }
1958}
1959
1960ecb_inline void
1961prepare_cede (pTHX_ struct coro_transfer_args *ta)
1962{
1963 api_ready (aTHX_ coro_current);
1964 prepare_schedule (aTHX_ ta);
1965}
1966
1967ecb_inline void
1968prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1969{
1970 SV *prev = SvRV (coro_current);
1971
1972 if (coro_nready)
1973 {
1974 prepare_schedule (aTHX_ ta);
1975 api_ready (aTHX_ prev);
1976 }
1977 else
1978 prepare_nop (aTHX_ ta);
1979}
1980
1981static void
1982api_schedule (pTHX)
1983{
1984 struct coro_transfer_args ta;
1985
1986 prepare_schedule (aTHX_ &ta);
1987 TRANSFER (ta, 1);
1988}
1989
1990static void
1991api_schedule_to (pTHX_ SV *coro_sv)
1992{
1993 struct coro_transfer_args ta;
1994 struct coro *next = SvSTATE (coro_sv);
1995
1996 SvREFCNT_inc_NN (coro_sv);
1997 prepare_schedule_to (aTHX_ &ta, next);
1998}
1999
2000static int
2001api_cede (pTHX)
2002{
2003 struct coro_transfer_args ta;
2004
2005 prepare_cede (aTHX_ &ta);
2006
2007 if (ecb_expect_true (ta.prev != ta.next))
2008 {
2009 TRANSFER (ta, 1);
2010 return 1;
2011 }
2012 else
2013 return 0;
2014}
2015
2016static int
2017api_cede_notself (pTHX)
2018{
2019 if (coro_nready)
2020 {
2021 struct coro_transfer_args ta;
2022
2023 prepare_cede_notself (aTHX_ &ta);
2024 TRANSFER (ta, 1);
2025 return 1;
2026 }
2027 else
2028 return 0;
2029}
2030
2031static void
2032api_trace (pTHX_ SV *coro_sv, int flags)
2033{
2034 struct coro *coro = SvSTATE (coro_sv);
2035
2036 if (coro->flags & CF_RUNNING)
2037 croak ("cannot enable tracing on a running coroutine, caught");
2038
2039 if (flags & CC_TRACE)
2040 {
2041 if (!coro->cctx)
2042 coro->cctx = cctx_new_run ();
2043 else if (!(coro->cctx->flags & CC_TRACE))
2044 croak ("cannot enable tracing on coroutine with custom stack, caught");
2045
2046 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2047 }
2048 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2049 {
2050 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2051
2052 if (coro->flags & CF_RUNNING)
2053 PL_runops = RUNOPS_DEFAULT;
2054 else
2055 coro->slot->runops = RUNOPS_DEFAULT;
2056 }
2057}
2058
2059static void
2060coro_push_av (pTHX_ AV *av, I32 gimme_v)
2061{
2062 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2063 {
2064 dSP;
2065
2066 if (gimme_v == G_SCALAR)
2067 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2068 else
2069 {
2070 int i;
2071 EXTEND (SP, AvFILLp (av) + 1);
2072
2073 for (i = 0; i <= AvFILLp (av); ++i)
2074 PUSHs (AvARRAY (av)[i]);
2075 }
2076
2077 PUTBACK;
2078 }
2079}
2080
2081static void
2082coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2083{
2084 if (!coro->on_destroy)
2085 coro->on_destroy = newAV ();
2086
2087 av_push (coro->on_destroy, cb);
2088}
2089
2090static void
2091slf_destroy_join (pTHX_ struct CoroSLF *frame)
2092{
2093 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2094}
2095
2096static int
2097slf_check_join (pTHX_ struct CoroSLF *frame)
2098{
2099 struct coro *coro = (struct coro *)frame->data;
2100
2101 if (!coro->status)
2102 return 1;
2103
2104 frame->destroy = 0;
2105
2106 coro_push_av (aTHX_ coro->status, GIMME_V);
2107
2108 SvREFCNT_dec ((SV *)coro->hv);
2109
2110 return 0;
2111}
2112
2113static void
2114slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2115{
2116 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2117
2118 if (items > 1)
2119 croak ("join called with too many arguments");
2120
2121 if (coro->status)
2122 frame->prepare = prepare_nop;
2123 else
2124 {
2125 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2126 frame->prepare = prepare_schedule;
2127 }
2128
2129 frame->check = slf_check_join;
2130 frame->destroy = slf_destroy_join;
2131 frame->data = (void *)coro;
2132 SvREFCNT_inc (coro->hv);
2133}
2134
2135static void
2136coro_call_on_destroy (pTHX_ struct coro *coro)
2137{
2138 AV *od = coro->on_destroy;
2139
2140 if (!od)
2141 return;
2142
2143 while (AvFILLp (od) >= 0)
2144 {
2145 SV *cb = sv_2mortal (av_pop (od));
2146
2147 /* coro hv's (and only hv's at the moment) are supported as well */
2148 if (SvSTATEhv_p (aTHX_ cb))
2149 api_ready (aTHX_ cb);
2150 else
2151 {
2152 dSP; /* don't disturb outer sp */
2153 PUSHMARK (SP);
2154
2155 if (coro->status)
2156 {
2157 PUTBACK;
2158 coro_push_av (aTHX_ coro->status, G_ARRAY);
2159 SPAGAIN;
2160 }
2161
2162 PUTBACK;
2163 call_sv (cb, G_VOID | G_DISCARD);
2164 }
2165 }
2166}
2167
2168static void
2169coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2170{
2171 AV *av;
2172
2173 if (coro->status)
2174 {
2175 av = coro->status;
2176 av_clear (av);
2177 }
2178 else
2179 av = coro->status = newAV ();
2180
2181 /* items are actually not so common, so optimise for this case */
2182 if (items)
2183 {
2184 int i;
2185
2186 av_extend (av, items - 1);
2187
2188 for (i = 0; i < items; ++i)
2189 av_push (av, SvREFCNT_inc_NN (arg [i]));
2190 }
2191}
2192
2193static void
2194slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2195{
2196 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2197 api_ready (aTHX_ sv_manager);
2198
2199 frame->prepare = prepare_schedule;
2200 frame->check = slf_check_repeat;
2201
2202 /* as a minor optimisation, we could unwind all stacks here */
2203 /* but that puts extra pressure on pp_slf, and is not worth much */
2204 /*coro_unwind_stacks (aTHX);*/
2205}
2206
2207static void
2208slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 HV *coro_hv = (HV *)SvRV (coro_current);
2211
2212 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2213 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2214}
2215
2216static void
2217slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2218{
2219 HV *coro_hv;
2220 struct coro *coro;
2221
2222 if (items <= 0)
2223 croak ("Coro::cancel called without coro object,");
2224
2225 coro = SvSTATE (arg [0]);
2226 coro_hv = coro->hv;
2227
2228 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2229
2230 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2231 {
2232 /* coro currently busy cancelling something, so just notify it */
2233 coro->slf_frame.data = (void *)coro;
2234
2235 frame->prepare = prepare_nop;
2236 frame->check = slf_check_nop;
2237 }
2238 else if (coro_hv == (HV *)SvRV (coro_current))
2239 {
2240 /* cancelling the current coro is allowed, and equals terminate */
2241 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2242 }
2243 else
2244 {
2245 struct coro *self = SvSTATE_current;
2246
2247 /* otherwise we cancel directly, purely for speed reasons
2248 * unfortunately, this requires some magic trickery, as
2249 * somebody else could cancel us, so we have to fight the cancellation.
2250 * this is ugly, and hopefully fully worth the extra speed.
2251 * besides, I can't get the slow-but-safe version working...
2252 */
2253 slf_frame.data = 0;
2254 self->flags |= CF_NOCANCEL;
2255 coro_state_destroy (aTHX_ coro);
2256 self->flags &= ~CF_NOCANCEL;
2257
2258 if (slf_frame.data)
2259 {
2260 /* while we were busy we have been cancelled, so terminate */
2261 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2262 }
2263 else
2264 {
2265 frame->prepare = prepare_nop;
2266 frame->check = slf_check_nop;
2267 }
2268 }
2269}
2270
2271static int
2272slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2273{
2274 frame->prepare = 0;
2275 coro_unwind_stacks (aTHX);
2276
2277 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2278
2279 return 1;
2280}
2281
2282static int
2283safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2284{
2285 if (coro->cctx)
2286 croak ("coro inside C callback, unable to cancel at this time, caught");
2287
2288 if (coro->flags & CF_NEW)
2289 {
2290 coro_set_status (aTHX_ coro, arg, items);
2291 coro_state_destroy (aTHX_ coro);
2292 }
2293 else
2294 {
2295 if (!coro->slf_frame.prepare)
2296 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2297
2298 slf_destroy (aTHX_ coro);
2299
2300 coro_set_status (aTHX_ coro, arg, items);
2301 coro->slf_frame.prepare = prepare_nop;
2302 coro->slf_frame.check = slf_check_safe_cancel;
2303
2304 api_ready (aTHX_ (SV *)coro->hv);
2305 }
2306
2307 return 1;
2308}
2309
2310/*****************************************************************************/
2311/* async pool handler */
2312
2313static int
2314slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2315{
2316 HV *hv = (HV *)SvRV (coro_current);
2317 struct coro *coro = (struct coro *)frame->data;
2318
2319 if (!coro->invoke_cb)
2320 return 1; /* loop till we have invoke */
2321 else
2322 {
2323 hv_store (hv, "desc", sizeof ("desc") - 1,
2324 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2325
2326 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
992 2327
993 { 2328 {
994 dSP; 2329 dSP;
995 2330 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
996 ENTER;
997 SAVETMPS;
998
999 PUSHMARK (SP);
1000 PUTBACK; 2331 PUTBACK;
1001 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1002
1003 FREETMPS;
1004 LEAVE;
1005 } 2332 }
2333
2334 SvREFCNT_dec (GvAV (PL_defgv));
2335 GvAV (PL_defgv) = coro->invoke_av;
2336 coro->invoke_av = 0;
2337
2338 return 0;
2339 }
2340}
2341
2342static void
2343slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2344{
2345 HV *hv = (HV *)SvRV (coro_current);
2346 struct coro *coro = SvSTATE_hv ((SV *)hv);
2347
2348 if (ecb_expect_true (coro->saved_deffh))
1006 } 2349 {
2350 /* subsequent iteration */
2351 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2352 coro->saved_deffh = 0;
1007 2353
1008 prev = SvRV (coro_current); 2354 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1009 SvRV_set (coro_current, next); 2355 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2356 {
2357 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2358 return;
2359 }
2360 else
2361 {
2362 av_clear (GvAV (PL_defgv));
2363 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1010 2364
1011 /* free this only after the transfer */ 2365 coro->prio = 0;
1012 LOCK;
1013 free_coro_mortal ();
1014 UNLOCK;
1015 coro_mortal = prev;
1016 2366
1017 assert (!SvROK(prev));//D 2367 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1018 assert (!SvROK(next));//D 2368 api_trace (aTHX_ coro_current, 0);
1019 2369
1020 ta->prev = SvSTATE (prev); 2370 frame->prepare = prepare_schedule;
1021 ta->next = SvSTATE (next); 2371 av_push (av_async_pool, SvREFCNT_inc (hv));
2372 }
2373 }
2374 else
2375 {
2376 /* first iteration, simply fall through */
2377 frame->prepare = prepare_nop;
2378 }
1022 2379
1023 assert (ta->next->flags & CF_READY); 2380 frame->check = slf_check_pool_handler;
1024 ta->next->flags &= ~CF_READY; 2381 frame->data = (void *)coro;
1025} 2382}
1026 2383
2384/*****************************************************************************/
2385/* rouse callback */
2386
2387#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2388
1027static void 2389static void
1028prepare_cede (struct transfer_args *ta) 2390coro_rouse_callback (pTHX_ CV *cv)
1029{ 2391{
1030 api_ready (coro_current); 2392 dXSARGS;
1031 prepare_schedule (ta); 2393 SV *data = (SV *)S_GENSUB_ARG;
2394
2395 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2396 {
2397 /* first call, set args */
2398 SV *coro = SvRV (data);
2399 AV *av = newAV ();
2400
2401 SvRV_set (data, (SV *)av);
2402
2403 /* better take a full copy of the arguments */
2404 while (items--)
2405 av_store (av, items, newSVsv (ST (items)));
2406
2407 api_ready (aTHX_ coro);
2408 SvREFCNT_dec (coro);
2409 }
2410
2411 XSRETURN_EMPTY;
1032} 2412}
1033 2413
1034static int 2414static int
1035prepare_cede_notself (struct transfer_args *ta) 2415slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1036{ 2416{
1037 if (coro_nready) 2417 SV *data = (SV *)frame->data;
2418
2419 if (CORO_THROW)
2420 return 0;
2421
2422 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2423 return 1;
2424
2425 /* now push all results on the stack */
2426 {
2427 dSP;
2428 AV *av = (AV *)SvRV (data);
2429 int i;
2430
2431 EXTEND (SP, AvFILLp (av) + 1);
2432 for (i = 0; i <= AvFILLp (av); ++i)
2433 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2434
2435 /* we have stolen the elements, so set length to zero and free */
2436 AvFILLp (av) = -1;
2437 av_undef (av);
2438
2439 PUTBACK;
2440 }
2441
2442 return 0;
2443}
2444
2445static void
2446slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2447{
2448 SV *cb;
2449
2450 if (items)
2451 cb = arg [0];
2452 else
2453 {
2454 struct coro *coro = SvSTATE_current;
2455
2456 if (!coro->rouse_cb)
2457 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2458
2459 cb = sv_2mortal (coro->rouse_cb);
2460 coro->rouse_cb = 0;
1038 { 2461 }
2462
2463 if (!SvROK (cb)
2464 || SvTYPE (SvRV (cb)) != SVt_PVCV
2465 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2466 croak ("Coro::rouse_wait called with illegal callback argument,");
2467
2468 {
2469 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2470 SV *data = (SV *)S_GENSUB_ARG;
2471
2472 frame->data = (void *)data;
2473 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2474 frame->check = slf_check_rouse_wait;
2475 }
2476}
2477
2478static SV *
2479coro_new_rouse_cb (pTHX)
2480{
2481 HV *hv = (HV *)SvRV (coro_current);
2482 struct coro *coro = SvSTATE_hv (hv);
2483 SV *data = newRV_inc ((SV *)hv);
2484 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2485
2486 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2487 SvREFCNT_dec (data); /* magicext increases the refcount */
2488
2489 SvREFCNT_dec (coro->rouse_cb);
2490 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2491
2492 return cb;
2493}
2494
2495/*****************************************************************************/
2496/* schedule-like-function opcode (SLF) */
2497
2498static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2499static const CV *slf_cv;
2500static SV **slf_argv;
2501static int slf_argc, slf_arga; /* count, allocated */
2502static I32 slf_ax; /* top of stack, for restore */
2503
2504/* this restores the stack in the case we patched the entersub, to */
2505/* recreate the stack frame as perl will on following calls */
2506/* since entersub cleared the stack */
2507static OP *
2508pp_restore (pTHX)
2509{
2510 int i;
2511 SV **SP = PL_stack_base + slf_ax;
2512
2513 PUSHMARK (SP);
2514
2515 EXTEND (SP, slf_argc + 1);
2516
2517 for (i = 0; i < slf_argc; ++i)
2518 PUSHs (sv_2mortal (slf_argv [i]));
2519
2520 PUSHs ((SV *)CvGV (slf_cv));
2521
2522 RETURNOP (slf_restore.op_first);
2523}
2524
2525static void
2526slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2527{
2528 SV **arg = (SV **)slf_frame.data;
2529
2530 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2531}
2532
2533static void
2534slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2535{
2536 if (items != 2)
2537 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2538
2539 frame->prepare = slf_prepare_transfer;
2540 frame->check = slf_check_nop;
2541 frame->data = (void *)arg; /* let's hope it will stay valid */
2542}
2543
2544static void
2545slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 frame->prepare = prepare_schedule;
2548 frame->check = slf_check_nop;
2549}
2550
2551static void
2552slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2553{
2554 struct coro *next = (struct coro *)slf_frame.data;
2555
2556 SvREFCNT_inc_NN (next->hv);
2557 prepare_schedule_to (aTHX_ ta, next);
2558}
2559
2560static void
2561slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 if (!items)
2564 croak ("Coro::schedule_to expects a coroutine argument, caught");
2565
2566 frame->data = (void *)SvSTATE (arg [0]);
2567 frame->prepare = slf_prepare_schedule_to;
2568 frame->check = slf_check_nop;
2569}
2570
2571static void
2572slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 api_ready (aTHX_ SvRV (coro_current));
2575
2576 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2577}
2578
2579static void
2580slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2581{
2582 frame->prepare = prepare_cede;
2583 frame->check = slf_check_nop;
2584}
2585
2586static void
2587slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_cede_notself;
2590 frame->check = slf_check_nop;
2591}
2592
2593/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2594static void
2595slf_destroy (pTHX_ struct coro *coro)
2596{
2597 /* this callback is reserved for slf functions needing to do cleanup */
2598 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2599 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2600
2601 /*
2602 * The on_destroy above most likely is from an SLF call.
2603 * Since by definition the SLF call will not finish when we destroy
2604 * the coro, we will have to force-finish it here, otherwise
2605 * cleanup functions cannot call SLF functions.
2606 */
2607 coro->slf_frame.prepare = 0;
2608}
2609
2610/*
2611 * these not obviously related functions are all rolled into one
2612 * function to increase chances that they all will call transfer with the same
2613 * stack offset
2614 * SLF stands for "schedule-like-function".
2615 */
2616static OP *
2617pp_slf (pTHX)
2618{
2619 I32 checkmark; /* mark SP to see how many elements check has pushed */
2620
2621 /* set up the slf frame, unless it has already been set-up */
2622 /* the latter happens when a new coro has been started */
2623 /* or when a new cctx was attached to an existing coroutine */
2624 if (ecb_expect_true (!slf_frame.prepare))
2625 {
2626 /* first iteration */
2627 dSP;
2628 SV **arg = PL_stack_base + TOPMARK + 1;
2629 int items = SP - arg; /* args without function object */
2630 SV *gv = *sp;
2631
2632 /* do a quick consistency check on the "function" object, and if it isn't */
2633 /* for us, divert to the real entersub */
2634 if (SvTYPE (gv) != SVt_PVGV
2635 || !GvCV (gv)
2636 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2637 return PL_ppaddr[OP_ENTERSUB](aTHX);
2638
2639 if (!(PL_op->op_flags & OPf_STACKED))
2640 {
2641 /* ampersand-form of call, use @_ instead of stack */
2642 AV *av = GvAV (PL_defgv);
2643 arg = AvARRAY (av);
2644 items = AvFILLp (av) + 1;
2645 }
2646
2647 /* now call the init function, which needs to set up slf_frame */
2648 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2649 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2650
2651 /* pop args */
2652 SP = PL_stack_base + POPMARK;
2653
2654 PUTBACK;
2655 }
2656
2657 /* now that we have a slf_frame, interpret it! */
2658 /* we use a callback system not to make the code needlessly */
2659 /* complicated, but so we can run multiple perl coros from one cctx */
2660
2661 do
2662 {
2663 struct coro_transfer_args ta;
2664
2665 slf_frame.prepare (aTHX_ &ta);
2666 TRANSFER (ta, 0);
2667
2668 checkmark = PL_stack_sp - PL_stack_base;
2669 }
2670 while (slf_frame.check (aTHX_ &slf_frame));
2671
2672 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2673
2674 /* exception handling */
2675 if (ecb_expect_false (CORO_THROW))
2676 {
2677 SV *exception = sv_2mortal (CORO_THROW);
2678
2679 CORO_THROW = 0;
2680 sv_setsv (ERRSV, exception);
2681 croak (0);
2682 }
2683
2684 /* return value handling - mostly like entersub */
2685 /* make sure we put something on the stack in scalar context */
2686 if (GIMME_V == G_SCALAR
2687 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2688 {
2689 dSP;
2690 SV **bot = PL_stack_base + checkmark;
2691
2692 if (sp == bot) /* too few, push undef */
2693 bot [1] = &PL_sv_undef;
2694 else /* too many, take last one */
2695 bot [1] = *sp;
2696
2697 SP = bot + 1;
2698
2699 PUTBACK;
2700 }
2701
2702 return NORMAL;
2703}
2704
2705static void
2706api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2707{
2708 int i;
2709 SV **arg = PL_stack_base + ax;
2710 int items = PL_stack_sp - arg + 1;
2711
2712 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2713
2714 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2715 && PL_op->op_ppaddr != pp_slf)
2716 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2717
2718 CvFLAGS (cv) |= CVf_SLF;
2719 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2720 slf_cv = cv;
2721
2722 /* we patch the op, and then re-run the whole call */
2723 /* we have to put the same argument on the stack for this to work */
2724 /* and this will be done by pp_restore */
2725 slf_restore.op_next = (OP *)&slf_restore;
2726 slf_restore.op_type = OP_CUSTOM;
2727 slf_restore.op_ppaddr = pp_restore;
2728 slf_restore.op_first = PL_op;
2729
2730 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2731
2732 if (PL_op->op_flags & OPf_STACKED)
2733 {
2734 if (items > slf_arga)
2735 {
2736 slf_arga = items;
2737 Safefree (slf_argv);
2738 New (0, slf_argv, slf_arga, SV *);
2739 }
2740
2741 slf_argc = items;
2742
2743 for (i = 0; i < items; ++i)
2744 slf_argv [i] = SvREFCNT_inc (arg [i]);
2745 }
2746 else
2747 slf_argc = 0;
2748
2749 PL_op->op_ppaddr = pp_slf;
2750 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2751
2752 PL_op = (OP *)&slf_restore;
2753}
2754
2755/*****************************************************************************/
2756/* dynamic wind */
2757
2758static void
2759on_enterleave_call (pTHX_ SV *cb)
2760{
2761 dSP;
2762
2763 PUSHSTACK;
2764
2765 PUSHMARK (SP);
2766 PUTBACK;
2767 call_sv (cb, G_VOID | G_DISCARD);
2768 SPAGAIN;
2769
2770 POPSTACK;
2771}
2772
2773static SV *
2774coro_avp_pop_and_free (pTHX_ AV **avp)
2775{
2776 AV *av = *avp;
2777 SV *res = av_pop (av);
2778
2779 if (AvFILLp (av) < 0)
2780 {
2781 *avp = 0;
2782 SvREFCNT_dec (av);
2783 }
2784
2785 return res;
2786}
2787
2788static void
2789coro_pop_on_enter (pTHX_ void *coro)
2790{
2791 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2792 SvREFCNT_dec (cb);
2793}
2794
2795static void
2796coro_pop_on_leave (pTHX_ void *coro)
2797{
2798 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2799 on_enterleave_call (aTHX_ sv_2mortal (cb));
2800}
2801
2802/*****************************************************************************/
2803/* PerlIO::cede */
2804
2805typedef struct
2806{
2807 PerlIOBuf base;
2808 NV next, every;
2809} PerlIOCede;
2810
2811static IV ecb_cold
2812PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815
2816 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2817 self->next = nvtime () + self->every;
2818
2819 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2820}
2821
2822static SV * ecb_cold
2823PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2824{
2825 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2826
2827 return newSVnv (self->every);
2828}
2829
2830static IV
2831PerlIOCede_flush (pTHX_ PerlIO *f)
2832{
2833 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2834 double now = nvtime ();
2835
2836 if (now >= self->next)
2837 {
2838 api_cede (aTHX);
2839 self->next = now + self->every;
2840 }
2841
2842 return PerlIOBuf_flush (aTHX_ f);
2843}
2844
2845static PerlIO_funcs PerlIO_cede =
2846{
2847 sizeof(PerlIO_funcs),
2848 "cede",
2849 sizeof(PerlIOCede),
2850 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2851 PerlIOCede_pushed,
2852 PerlIOBuf_popped,
2853 PerlIOBuf_open,
2854 PerlIOBase_binmode,
2855 PerlIOCede_getarg,
2856 PerlIOBase_fileno,
2857 PerlIOBuf_dup,
2858 PerlIOBuf_read,
2859 PerlIOBuf_unread,
2860 PerlIOBuf_write,
2861 PerlIOBuf_seek,
2862 PerlIOBuf_tell,
2863 PerlIOBuf_close,
2864 PerlIOCede_flush,
2865 PerlIOBuf_fill,
2866 PerlIOBase_eof,
2867 PerlIOBase_error,
2868 PerlIOBase_clearerr,
2869 PerlIOBase_setlinebuf,
2870 PerlIOBuf_get_base,
2871 PerlIOBuf_bufsiz,
2872 PerlIOBuf_get_ptr,
2873 PerlIOBuf_get_cnt,
2874 PerlIOBuf_set_ptrcnt,
2875};
2876
2877/*****************************************************************************/
2878/* Coro::Semaphore & Coro::Signal */
2879
2880static SV *
2881coro_waitarray_new (pTHX_ int count)
2882{
2883 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2884 AV *av = newAV ();
2885 SV **ary;
2886
2887 /* unfortunately, building manually saves memory */
2888 Newx (ary, 2, SV *);
2889 AvALLOC (av) = ary;
2890#if PERL_VERSION_ATLEAST (5,10,0)
2891 AvARRAY (av) = ary;
2892#else
2893 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2894 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2895 SvPVX ((SV *)av) = (char *)ary;
2896#endif
2897 AvMAX (av) = 1;
2898 AvFILLp (av) = 0;
2899 ary [0] = newSViv (count);
2900
2901 return newRV_noinc ((SV *)av);
2902}
2903
2904/* semaphore */
2905
2906static void
2907coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2908{
2909 SV *count_sv = AvARRAY (av)[0];
2910 IV count = SvIVX (count_sv);
2911
2912 count += adjust;
2913 SvIVX (count_sv) = count;
2914
2915 /* now wake up as many waiters as are expected to lock */
2916 while (count > 0 && AvFILLp (av) > 0)
2917 {
2918 SV *cb;
2919
2920 /* swap first two elements so we can shift a waiter */
2921 AvARRAY (av)[0] = AvARRAY (av)[1];
2922 AvARRAY (av)[1] = count_sv;
2923 cb = av_shift (av);
2924
2925 if (SvOBJECT (cb))
2926 {
2927 api_ready (aTHX_ cb);
2928 --count;
2929 }
2930 else if (SvTYPE (cb) == SVt_PVCV)
2931 {
2932 dSP;
2933 PUSHMARK (SP);
2934 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2935 PUTBACK;
2936 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2937 }
2938
2939 SvREFCNT_dec (cb);
2940 }
2941}
2942
2943static void
2944coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2945{
2946 /* call $sem->adjust (0) to possibly wake up some other waiters */
2947 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2948}
2949
2950static int
2951slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2952{
2953 AV *av = (AV *)frame->data;
2954 SV *count_sv = AvARRAY (av)[0];
1039 SV *prev = SvRV (coro_current); 2955 SV *coro_hv = SvRV (coro_current);
1040 prepare_schedule (ta); 2956
1041 api_ready (prev); 2957 /* if we are about to throw, don't actually acquire the lock, just throw */
2958 if (CORO_THROW)
2959 return 0;
2960 else if (SvIVX (count_sv) > 0)
2961 {
2962 frame->destroy = 0;
2963
2964 if (acquire)
2965 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2966 else
2967 coro_semaphore_adjust (aTHX_ av, 0);
2968
2969 return 0;
2970 }
2971 else
2972 {
2973 int i;
2974 /* if we were woken up but can't down, we look through the whole */
2975 /* waiters list and only add us if we aren't in there already */
2976 /* this avoids some degenerate memory usage cases */
2977 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2978 if (AvARRAY (av)[i] == coro_hv)
2979 return 1;
2980
2981 av_push (av, SvREFCNT_inc (coro_hv));
1042 return 1; 2982 return 1;
1043 } 2983 }
2984}
2985
2986static int
2987slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2988{
2989 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2990}
2991
2992static int
2993slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2994{
2995 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2996}
2997
2998static void
2999slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3000{
3001 AV *av = (AV *)SvRV (arg [0]);
3002
3003 if (SvIVX (AvARRAY (av)[0]) > 0)
3004 {
3005 frame->data = (void *)av;
3006 frame->prepare = prepare_nop;
3007 }
1044 else 3008 else
3009 {
3010 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3011
3012 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3013 frame->prepare = prepare_schedule;
3014 /* to avoid race conditions when a woken-up coro gets terminated */
3015 /* we arrange for a temporary on_destroy that calls adjust (0) */
3016 frame->destroy = coro_semaphore_destroy;
3017 }
3018}
3019
3020static void
3021slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3022{
3023 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3024 frame->check = slf_check_semaphore_down;
3025}
3026
3027static void
3028slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3029{
3030 if (items >= 2)
3031 {
3032 /* callback form */
3033 AV *av = (AV *)SvRV (arg [0]);
3034 SV *cb_cv = s_get_cv_croak (arg [1]);
3035
3036 av_push (av, SvREFCNT_inc_NN (cb_cv));
3037
3038 if (SvIVX (AvARRAY (av)[0]) > 0)
3039 coro_semaphore_adjust (aTHX_ av, 0);
3040
3041 frame->prepare = prepare_nop;
3042 frame->check = slf_check_nop;
3043 }
3044 else
3045 {
3046 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3047 frame->check = slf_check_semaphore_wait;
3048 }
3049}
3050
3051/* signal */
3052
3053static void
3054coro_signal_wake (pTHX_ AV *av, int count)
3055{
3056 SvIVX (AvARRAY (av)[0]) = 0;
3057
3058 /* now signal count waiters */
3059 while (count > 0 && AvFILLp (av) > 0)
3060 {
3061 SV *cb;
3062
3063 /* swap first two elements so we can shift a waiter */
3064 cb = AvARRAY (av)[0];
3065 AvARRAY (av)[0] = AvARRAY (av)[1];
3066 AvARRAY (av)[1] = cb;
3067
3068 cb = av_shift (av);
3069
3070 if (SvTYPE (cb) == SVt_PVCV)
3071 {
3072 dSP;
3073 PUSHMARK (SP);
3074 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3075 PUTBACK;
3076 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3077 }
3078 else
3079 {
3080 api_ready (aTHX_ cb);
3081 sv_setiv (cb, 0); /* signal waiter */
3082 }
3083
3084 SvREFCNT_dec (cb);
3085
3086 --count;
3087 }
3088}
3089
3090static int
3091slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3092{
3093 /* if we are about to throw, also stop waiting */
3094 return SvROK ((SV *)frame->data) && !CORO_THROW;
3095}
3096
3097static void
3098slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3099{
3100 AV *av = (AV *)SvRV (arg [0]);
3101
3102 if (items >= 2)
3103 {
3104 SV *cb_cv = s_get_cv_croak (arg [1]);
3105 av_push (av, SvREFCNT_inc_NN (cb_cv));
3106
3107 if (SvIVX (AvARRAY (av)[0]))
3108 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3109
3110 frame->prepare = prepare_nop;
3111 frame->check = slf_check_nop;
3112 }
3113 else if (SvIVX (AvARRAY (av)[0]))
3114 {
3115 SvIVX (AvARRAY (av)[0]) = 0;
3116 frame->prepare = prepare_nop;
3117 frame->check = slf_check_nop;
3118 }
3119 else
3120 {
3121 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3122
3123 av_push (av, waiter);
3124
3125 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3126 frame->prepare = prepare_schedule;
3127 frame->check = slf_check_signal_wait;
3128 }
3129}
3130
3131/*****************************************************************************/
3132/* Coro::AIO */
3133
3134#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3135
3136/* helper storage struct */
3137struct io_state
3138{
3139 int errorno;
3140 I32 laststype; /* U16 in 5.10.0 */
3141 int laststatval;
3142 Stat_t statcache;
3143};
3144
3145static void
3146coro_aio_callback (pTHX_ CV *cv)
3147{
3148 dXSARGS;
3149 AV *state = (AV *)S_GENSUB_ARG;
3150 SV *coro = av_pop (state);
3151 SV *data_sv = newSV (sizeof (struct io_state));
3152
3153 av_extend (state, items - 1);
3154
3155 sv_upgrade (data_sv, SVt_PV);
3156 SvCUR_set (data_sv, sizeof (struct io_state));
3157 SvPOK_only (data_sv);
3158
3159 {
3160 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3161
3162 data->errorno = errno;
3163 data->laststype = PL_laststype;
3164 data->laststatval = PL_laststatval;
3165 data->statcache = PL_statcache;
3166 }
3167
3168 /* now build the result vector out of all the parameters and the data_sv */
3169 {
3170 int i;
3171
3172 for (i = 0; i < items; ++i)
3173 av_push (state, SvREFCNT_inc_NN (ST (i)));
3174 }
3175
3176 av_push (state, data_sv);
3177
3178 api_ready (aTHX_ coro);
3179 SvREFCNT_dec (coro);
3180 SvREFCNT_dec ((AV *)state);
3181}
3182
3183static int
3184slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3185{
3186 AV *state = (AV *)frame->data;
3187
3188 /* if we are about to throw, return early */
3189 /* this does not cancel the aio request, but at least */
3190 /* it quickly returns */
3191 if (CORO_THROW)
1045 return 0; 3192 return 0;
1046}
1047 3193
1048static void 3194 /* one element that is an RV? repeat! */
1049api_schedule (void) 3195 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1050{
1051 struct transfer_args ta;
1052
1053 prepare_schedule (&ta);
1054 TRANSFER (ta);
1055}
1056
1057static int
1058api_cede (void)
1059{
1060 struct transfer_args ta;
1061
1062 prepare_cede (&ta);
1063
1064 if (ta.prev != ta.next)
1065 {
1066 TRANSFER (ta);
1067 return 1; 3196 return 1;
3197
3198 /* restore status */
3199 {
3200 SV *data_sv = av_pop (state);
3201 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3202
3203 errno = data->errorno;
3204 PL_laststype = data->laststype;
3205 PL_laststatval = data->laststatval;
3206 PL_statcache = data->statcache;
3207
3208 SvREFCNT_dec (data_sv);
1068 } 3209 }
1069 else 3210
3211 /* push result values */
3212 {
3213 dSP;
3214 int i;
3215
3216 EXTEND (SP, AvFILLp (state) + 1);
3217 for (i = 0; i <= AvFILLp (state); ++i)
3218 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3219
3220 PUTBACK;
3221 }
3222
1070 return 0; 3223 return 0;
1071} 3224}
1072 3225
1073static int 3226static void
1074api_cede_notself (void) 3227slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1075{ 3228{
1076 struct transfer_args ta; 3229 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3230 SV *coro_hv = SvRV (coro_current);
3231 struct coro *coro = SvSTATE_hv (coro_hv);
1077 3232
1078 if (prepare_cede_notself (&ta)) 3233 /* put our coroutine id on the state arg */
1079 { 3234 av_push (state, SvREFCNT_inc_NN (coro_hv));
1080 TRANSFER (ta); 3235
1081 return 1; 3236 /* first see whether we have a non-zero priority and set it as AIO prio */
3237 if (coro->prio)
1082 } 3238 {
1083 else 3239 dSP;
1084 return 0;
1085}
1086 3240
3241 static SV *prio_cv;
3242 static SV *prio_sv;
3243
3244 if (ecb_expect_false (!prio_cv))
3245 {
3246 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3247 prio_sv = newSViv (0);
3248 }
3249
3250 PUSHMARK (SP);
3251 sv_setiv (prio_sv, coro->prio);
3252 XPUSHs (prio_sv);
3253
3254 PUTBACK;
3255 call_sv (prio_cv, G_VOID | G_DISCARD);
3256 }
3257
3258 /* now call the original request */
3259 {
3260 dSP;
3261 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3262 int i;
3263
3264 PUSHMARK (SP);
3265
3266 /* first push all args to the stack */
3267 EXTEND (SP, items + 1);
3268
3269 for (i = 0; i < items; ++i)
3270 PUSHs (arg [i]);
3271
3272 /* now push the callback closure */
3273 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3274
3275 /* now call the AIO function - we assume our request is uncancelable */
3276 PUTBACK;
3277 call_sv ((SV *)req, G_VOID | G_DISCARD);
3278 }
3279
3280 /* now that the request is going, we loop till we have a result */
3281 frame->data = (void *)state;
3282 frame->prepare = prepare_schedule;
3283 frame->check = slf_check_aio_req;
3284}
3285
3286static void
3287coro_aio_req_xs (pTHX_ CV *cv)
3288{
3289 dXSARGS;
3290
3291 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3292
3293 XSRETURN_EMPTY;
3294}
3295
3296/*****************************************************************************/
3297
3298#if CORO_CLONE
3299# include "clone.c"
3300#endif
3301
3302/*****************************************************************************/
3303
3304static SV *
3305coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3306{
3307 SV *coro_sv;
3308 struct coro *coro;
3309 MAGIC *mg;
3310 HV *hv;
3311 SV *cb;
3312 int i;
3313
3314 if (argc > 0)
3315 {
3316 cb = s_get_cv_croak (argv [0]);
3317
3318 if (!is_coro)
3319 {
3320 if (CvISXSUB (cb))
3321 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3322
3323 if (!CvROOT (cb))
3324 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3325 }
3326 }
3327
3328 Newz (0, coro, 1, struct coro);
3329 coro->args = newAV ();
3330 coro->flags = CF_NEW;
3331
3332 if (coro_first) coro_first->prev = coro;
3333 coro->next = coro_first;
3334 coro_first = coro;
3335
3336 coro->hv = hv = newHV ();
3337 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3338 mg->mg_flags |= MGf_DUP;
3339 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3340
3341 if (argc > 0)
3342 {
3343 av_extend (coro->args, argc + is_coro - 1);
3344
3345 if (is_coro)
3346 {
3347 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3348 cb = (SV *)cv_coro_run;
3349 }
3350
3351 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3352
3353 for (i = 1; i < argc; i++)
3354 av_push (coro->args, newSVsv (argv [i]));
3355 }
3356
3357 return coro_sv;
3358}
3359
3360#ifndef __cplusplus
3361ecb_cold XS(boot_Coro__State);
3362#endif
3363
3364#if CORO_JIT
3365
3366static void ecb_noinline ecb_cold
3367pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3368{
3369 dSP;
3370 AV *av = newAV ();
3371
3372 av_store (av, 3, newSVuv (d));
3373 av_store (av, 2, newSVuv (c));
3374 av_store (av, 1, newSVuv (b));
3375 av_store (av, 0, newSVuv (a));
3376
3377 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3378
3379 PUTBACK;
3380}
3381
3382static void ecb_noinline ecb_cold
3383jit_init (pTHX)
3384{
3385 dSP;
3386 SV *load, *save;
3387 char *map_base;
3388 char *load_ptr, *save_ptr;
3389 STRLEN load_len, save_len, map_len;
3390 int count;
3391
3392 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3393
3394 PUSHMARK (SP);
3395#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3396# include "state.h"
3397#undef VARx
3398 count = call_pv ("Coro::State::_jit", G_ARRAY);
3399 SPAGAIN;
3400
3401 save = POPs; save_ptr = SvPVbyte (save, save_len);
3402 load = POPs; load_ptr = SvPVbyte (load, load_len);
3403
3404 map_len = load_len + save_len + 16;
3405
3406 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3407
3408 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3409
3410 load_perl_slots = (load_save_perl_slots_type)map_base;
3411 memcpy (map_base, load_ptr, load_len);
3412
3413 map_base += (load_len + 15) & ~15;
3414
3415 save_perl_slots = (load_save_perl_slots_type)map_base;
3416 memcpy (map_base, save_ptr, save_len);
3417
3418 /* we are good citizens and try to make the page read-only, so the evil evil */
3419 /* hackers might have it a bit more difficult */
3420 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3421
3422 PUTBACK;
3423 eval_pv ("undef &Coro::State::_jit", 1);
3424}
3425
3426#endif
3427
1087MODULE = Coro::State PACKAGE = Coro::State 3428MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1088 3429
1089PROTOTYPES: DISABLE 3430PROTOTYPES: DISABLE
1090 3431
1091BOOT: 3432BOOT:
1092{ 3433{
1093#ifdef USE_ITHREADS 3434#ifdef USE_ITHREADS
1094 MUTEX_INIT (&coro_mutex); 3435# if CORO_PTHREAD
3436 coro_thx = PERL_GET_CONTEXT;
3437# endif
1095#endif 3438#endif
1096 BOOT_PAGESIZE; 3439 BOOT_PAGESIZE;
1097 3440
3441 /* perl defines these to check for existance first, but why it doesn't */
3442 /* just create them one at init time is not clear to me, except for */
3443 /* programs trying to delete them, but... */
3444 /* anyway, we declare this as invalid and make sure they are initialised here */
3445 DEFSV;
3446 ERRSV;
3447
3448 cctx_current = cctx_new_empty ();
3449
3450 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3451 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3452
3453 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3454 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3455 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3456
3457 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3458 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3459 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3460
1098 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3461 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1099 3462
3463 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3464 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1100 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3465 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1101 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1102 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1103 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1104 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3466 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1105 3467
1106 main_mainstack = PL_mainstack; 3468 main_mainstack = PL_mainstack;
3469 main_top_env = PL_top_env;
1107 3470
3471 while (main_top_env->je_prev)
3472 main_top_env = main_top_env->je_prev;
3473
3474 {
3475 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3476
3477 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3478 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3479
3480 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3481 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3482 }
3483
1108 coroapi.ver = CORO_API_VERSION; 3484 coroapi.ver = CORO_API_VERSION;
3485 coroapi.rev = CORO_API_REVISION;
3486
1109 coroapi.transfer = api_transfer; 3487 coroapi.transfer = api_transfer;
1110 3488
3489 coroapi.sv_state = SvSTATE_;
3490 coroapi.execute_slf = api_execute_slf;
3491 coroapi.prepare_nop = prepare_nop;
3492 coroapi.prepare_schedule = prepare_schedule;
3493 coroapi.prepare_cede = prepare_cede;
3494 coroapi.prepare_cede_notself = prepare_cede_notself;
3495
3496 time_init (aTHX);
3497
1111 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3498 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3499#if CORO_JIT
3500 PUTBACK;
3501 jit_init (aTHX);
3502 SPAGAIN;
3503#endif
1112} 3504}
1113 3505
1114SV * 3506SV *
1115new (char *klass, ...) 3507new (SV *klass, ...)
3508 ALIAS:
3509 Coro::new = 1
1116 CODE: 3510 CODE:
1117{ 3511 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1118 struct coro *coro;
1119 HV *hv;
1120 int i;
1121
1122 Newz (0, coro, 1, struct coro);
1123 coro->args = newAV ();
1124 coro->save = CORO_SAVE_ALL;
1125 coro->flags = CF_NEW;
1126
1127 hv = newHV ();
1128 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1129 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1130
1131 for (i = 1; i < items; i++)
1132 av_push (coro->args, newSVsv (ST (i)));
1133}
1134 OUTPUT:
1135 RETVAL
1136
1137int
1138save (SV *coro, int new_save = -1)
1139 CODE:
1140 RETVAL = api_save (coro, new_save);
1141 OUTPUT: 3512 OUTPUT:
1142 RETVAL 3513 RETVAL
1143 3514
1144void 3515void
1145_set_stacklevel (...) 3516transfer (...)
1146 ALIAS: 3517 PROTOTYPE: $$
1147 Coro::State::transfer = 1 3518 CODE:
1148 Coro::schedule = 2 3519 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1149 Coro::cede = 3
1150 Coro::cede_notself = 4
1151 CODE:
1152{
1153 struct transfer_args ta;
1154
1155 switch (ix)
1156 {
1157 case 0:
1158 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1159 ta.next = 0;
1160 break;
1161
1162 case 1:
1163 if (items != 2)
1164 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1165
1166 prepare_transfer (&ta, ST (0), ST (1));
1167 break;
1168
1169 case 2:
1170 prepare_schedule (&ta);
1171 break;
1172
1173 case 3:
1174 prepare_cede (&ta);
1175 break;
1176
1177 case 4:
1178 if (!prepare_cede_notself (&ta))
1179 XSRETURN_EMPTY;
1180
1181 break;
1182 }
1183
1184 BARRIER;
1185 TRANSFER (ta);
1186}
1187 3520
1188void 3521void
1189_clone_state_from (SV *dst, SV *src)
1190 CODE:
1191{
1192 struct coro *coro_src = SvSTATE (src);
1193
1194 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1195
1196 ++coro_src->refcnt;
1197 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1198}
1199
1200void
1201_exit (code) 3522_exit (int code)
1202 int code
1203 PROTOTYPE: $ 3523 PROTOTYPE: $
1204 CODE: 3524 CODE:
1205 _exit (code); 3525 _exit (code);
1206 3526
3527SV *
3528clone (Coro::State coro)
3529 CODE:
3530{
3531#if CORO_CLONE
3532 struct coro *ncoro = coro_clone (aTHX_ coro);
3533 MAGIC *mg;
3534 /* TODO: too much duplication */
3535 ncoro->hv = newHV ();
3536 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3537 mg->mg_flags |= MGf_DUP;
3538 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3539#else
3540 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3541#endif
3542}
3543 OUTPUT:
3544 RETVAL
3545
3546int
3547cctx_stacksize (int new_stacksize = 0)
3548 PROTOTYPE: ;$
3549 CODE:
3550 RETVAL = cctx_stacksize;
3551 if (new_stacksize)
3552 {
3553 cctx_stacksize = new_stacksize;
3554 ++cctx_gen;
3555 }
3556 OUTPUT:
3557 RETVAL
3558
3559int
3560cctx_max_idle (int max_idle = 0)
3561 PROTOTYPE: ;$
3562 CODE:
3563 RETVAL = cctx_max_idle;
3564 if (max_idle > 1)
3565 cctx_max_idle = max_idle;
3566 OUTPUT:
3567 RETVAL
3568
1207int 3569int
1208cctx_count () 3570cctx_count ()
3571 PROTOTYPE:
1209 CODE: 3572 CODE:
1210 RETVAL = cctx_count; 3573 RETVAL = cctx_count;
1211 OUTPUT: 3574 OUTPUT:
1212 RETVAL 3575 RETVAL
1213 3576
1214int 3577int
1215cctx_idle () 3578cctx_idle ()
3579 PROTOTYPE:
1216 CODE: 3580 CODE:
1217 RETVAL = cctx_idle; 3581 RETVAL = cctx_idle;
1218 OUTPUT: 3582 OUTPUT:
1219 RETVAL 3583 RETVAL
1220 3584
3585void
3586list ()
3587 PROTOTYPE:
3588 PPCODE:
3589{
3590 struct coro *coro;
3591 for (coro = coro_first; coro; coro = coro->next)
3592 if (coro->hv)
3593 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3594}
3595
3596void
3597call (Coro::State coro, SV *coderef)
3598 ALIAS:
3599 eval = 1
3600 CODE:
3601{
3602 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3603 {
3604 struct coro *current = SvSTATE_current;
3605 struct CoroSLF slf_save;
3606
3607 if (current != coro)
3608 {
3609 PUTBACK;
3610 save_perl (aTHX_ current);
3611 load_perl (aTHX_ coro);
3612 /* the coro is most likely in an active SLF call.
3613 * while not strictly required (the code we execute is
3614 * not allowed to call any SLF functions), it's cleaner
3615 * to reinitialise the slf_frame and restore it later.
3616 * This might one day allow us to actually do SLF calls
3617 * from code executed here.
3618 */
3619 slf_save = slf_frame;
3620 slf_frame.prepare = 0;
3621 SPAGAIN;
3622 }
3623
3624 PUSHSTACK;
3625
3626 PUSHMARK (SP);
3627 PUTBACK;
3628
3629 if (ix)
3630 eval_sv (coderef, 0);
3631 else
3632 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3633
3634 POPSTACK;
3635 SPAGAIN;
3636
3637 if (current != coro)
3638 {
3639 PUTBACK;
3640 slf_frame = slf_save;
3641 save_perl (aTHX_ coro);
3642 load_perl (aTHX_ current);
3643 SPAGAIN;
3644 }
3645 }
3646}
3647
3648SV *
3649is_ready (Coro::State coro)
3650 PROTOTYPE: $
3651 ALIAS:
3652 is_ready = CF_READY
3653 is_running = CF_RUNNING
3654 is_new = CF_NEW
3655 is_destroyed = CF_ZOMBIE
3656 is_zombie = CF_ZOMBIE
3657 is_suspended = CF_SUSPENDED
3658 CODE:
3659 RETVAL = boolSV (coro->flags & ix);
3660 OUTPUT:
3661 RETVAL
3662
3663void
3664throw (Coro::State self, SV *exception = &PL_sv_undef)
3665 PROTOTYPE: $;$
3666 CODE:
3667{
3668 struct coro *current = SvSTATE_current;
3669 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3670 SvREFCNT_dec (*exceptionp);
3671 SvGETMAGIC (exception);
3672 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3673}
3674
3675void
3676api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3677 PROTOTYPE: $;$
3678 C_ARGS: aTHX_ coro, flags
3679
3680SV *
3681has_cctx (Coro::State coro)
3682 PROTOTYPE: $
3683 CODE:
3684 /* maybe manage the running flag differently */
3685 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3686 OUTPUT:
3687 RETVAL
3688
3689int
3690is_traced (Coro::State coro)
3691 PROTOTYPE: $
3692 CODE:
3693 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3694 OUTPUT:
3695 RETVAL
3696
3697UV
3698rss (Coro::State coro)
3699 PROTOTYPE: $
3700 ALIAS:
3701 usecount = 1
3702 CODE:
3703 switch (ix)
3704 {
3705 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3706 case 1: RETVAL = coro->usecount; break;
3707 }
3708 OUTPUT:
3709 RETVAL
3710
3711void
3712force_cctx ()
3713 PROTOTYPE:
3714 CODE:
3715 cctx_current->idle_sp = 0;
3716
3717void
3718swap_defsv (Coro::State self)
3719 PROTOTYPE: $
3720 ALIAS:
3721 swap_defav = 1
3722 CODE:
3723 if (!self->slot)
3724 croak ("cannot swap state with coroutine that has no saved state,");
3725 else
3726 {
3727 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3728 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3729
3730 SV *tmp = *src; *src = *dst; *dst = tmp;
3731 }
3732
3733void
3734cancel (Coro::State self)
3735 CODE:
3736 coro_state_destroy (aTHX_ self);
3737
3738SV *
3739enable_times (int enabled = enable_times)
3740 CODE:
3741{
3742 RETVAL = boolSV (enable_times);
3743
3744 if (enabled != enable_times)
3745 {
3746 enable_times = enabled;
3747
3748 coro_times_update ();
3749 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3750 }
3751}
3752 OUTPUT:
3753 RETVAL
3754
3755void
3756times (Coro::State self)
3757 PPCODE:
3758{
3759 struct coro *current = SvSTATE (coro_current);
3760
3761 if (ecb_expect_false (current == self))
3762 {
3763 coro_times_update ();
3764 coro_times_add (SvSTATE (coro_current));
3765 }
3766
3767 EXTEND (SP, 2);
3768 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3769 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3770
3771 if (ecb_expect_false (current == self))
3772 coro_times_sub (SvSTATE (coro_current));
3773}
3774
3775void
3776swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3777 CODE:
3778{
3779 struct coro *current = SvSTATE_current;
3780
3781 if (current == coro)
3782 SWAP_SVS (current);
3783
3784 if (!coro->swap_sv)
3785 coro->swap_sv = newAV ();
3786
3787 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3788 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3789
3790 if (current == coro)
3791 SWAP_SVS (current);
3792}
3793
3794
1221MODULE = Coro::State PACKAGE = Coro 3795MODULE = Coro::State PACKAGE = Coro
1222 3796
1223BOOT: 3797BOOT:
1224{ 3798{
1225 int i; 3799 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3800 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3801 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3802 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3803 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3804 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3805 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3806 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1226 3807
3808 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3809 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3810 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3811 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3812
1227 coro_stash = gv_stashpv ("Coro", TRUE); 3813 coro_stash = gv_stashpv ("Coro", TRUE);
1228 3814
1229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3815 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3816 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1231 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3817 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1232 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3818 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1233 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3819 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1234 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3820 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1235
1236 coro_current = get_sv ("Coro::current", FALSE);
1237 SvREADONLY_on (coro_current);
1238
1239 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1240 coro_ready[i] = newAV ();
1241 3821
1242 { 3822 {
1243 SV *sv = perl_get_sv("Coro::API", 1); 3823 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1244 3824
1245 coroapi.schedule = api_schedule; 3825 coroapi.schedule = api_schedule;
1246 coroapi.save = api_save; 3826 coroapi.schedule_to = api_schedule_to;
1247 coroapi.cede = api_cede; 3827 coroapi.cede = api_cede;
1248 coroapi.cede_notself = api_cede_notself; 3828 coroapi.cede_notself = api_cede_notself;
1249 coroapi.ready = api_ready; 3829 coroapi.ready = api_ready;
1250 coroapi.is_ready = api_is_ready; 3830 coroapi.is_ready = api_is_ready;
1251 coroapi.nready = &coro_nready; 3831 coroapi.nready = coro_nready;
1252 coroapi.current = coro_current; 3832 coroapi.current = coro_current;
1253 3833
1254 GCoroAPI = &coroapi; 3834 /*GCoroAPI = &coroapi;*/
1255 sv_setiv (sv, (IV)&coroapi); 3835 sv_setiv (sv, (IV)&coroapi);
1256 SvREADONLY_on (sv); 3836 SvREADONLY_on (sv);
1257 } 3837 }
1258} 3838}
3839
3840SV *
3841async (...)
3842 PROTOTYPE: &@
3843 CODE:
3844 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3845 api_ready (aTHX_ RETVAL);
3846 OUTPUT:
3847 RETVAL
3848
3849void
3850_destroy (Coro::State coro)
3851 CODE:
3852 /* used by the manager thread */
3853 coro_state_destroy (aTHX_ coro);
3854
3855void
3856on_destroy (Coro::State coro, SV *cb)
3857 CODE:
3858 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3859
3860void
3861join (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_join);
3864
3865void
3866terminate (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3869
3870void
3871cancel (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3874
3875int
3876safe_cancel (Coro::State self, ...)
3877 C_ARGS: aTHX_ self, &ST (1), items - 1
3878
3879void
3880schedule (...)
3881 CODE:
3882 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3883
3884void
3885schedule_to (...)
3886 CODE:
3887 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3888
3889void
3890cede_to (...)
3891 CODE:
3892 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3893
3894void
3895cede (...)
3896 CODE:
3897 CORO_EXECUTE_SLF_XS (slf_init_cede);
3898
3899void
3900cede_notself (...)
3901 CODE:
3902 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1259 3903
1260void 3904void
1261_set_current (SV *current) 3905_set_current (SV *current)
1262 PROTOTYPE: $ 3906 PROTOTYPE: $
1263 CODE: 3907 CODE:
1264 SvREFCNT_dec (SvRV (coro_current)); 3908 SvREFCNT_dec (SvRV (coro_current));
1265 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3909 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3910
3911void
3912_set_readyhook (SV *hook)
3913 PROTOTYPE: $
3914 CODE:
3915 SvREFCNT_dec (coro_readyhook);
3916 SvGETMAGIC (hook);
3917 if (SvOK (hook))
3918 {
3919 coro_readyhook = newSVsv (hook);
3920 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3921 }
3922 else
3923 {
3924 coro_readyhook = 0;
3925 CORO_READYHOOK = 0;
3926 }
1266 3927
1267int 3928int
1268prio (Coro::State coro, int newprio = 0) 3929prio (Coro::State coro, int newprio = 0)
3930 PROTOTYPE: $;$
1269 ALIAS: 3931 ALIAS:
1270 nice = 1 3932 nice = 1
1271 CODE: 3933 CODE:
1272{ 3934{
1273 RETVAL = coro->prio; 3935 RETVAL = coro->prio;
… …
1275 if (items > 1) 3937 if (items > 1)
1276 { 3938 {
1277 if (ix) 3939 if (ix)
1278 newprio = coro->prio - newprio; 3940 newprio = coro->prio - newprio;
1279 3941
1280 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3942 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1281 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3943 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1282 3944
1283 coro->prio = newprio; 3945 coro->prio = newprio;
1284 } 3946 }
1285} 3947}
1286 OUTPUT: 3948 OUTPUT:
… …
1288 3950
1289SV * 3951SV *
1290ready (SV *self) 3952ready (SV *self)
1291 PROTOTYPE: $ 3953 PROTOTYPE: $
1292 CODE: 3954 CODE:
1293 RETVAL = boolSV (api_ready (self)); 3955 RETVAL = boolSV (api_ready (aTHX_ self));
1294 OUTPUT:
1295 RETVAL
1296
1297SV *
1298is_ready (SV *self)
1299 PROTOTYPE: $
1300 CODE:
1301 RETVAL = boolSV (api_is_ready (self));
1302 OUTPUT: 3956 OUTPUT:
1303 RETVAL 3957 RETVAL
1304 3958
1305int 3959int
1306nready (...) 3960nready (...)
… …
1308 CODE: 3962 CODE:
1309 RETVAL = coro_nready; 3963 RETVAL = coro_nready;
1310 OUTPUT: 3964 OUTPUT:
1311 RETVAL 3965 RETVAL
1312 3966
1313MODULE = Coro::State PACKAGE = Coro::AIO 3967void
3968suspend (Coro::State self)
3969 PROTOTYPE: $
3970 CODE:
3971 self->flags |= CF_SUSPENDED;
3972
3973void
3974resume (Coro::State self)
3975 PROTOTYPE: $
3976 CODE:
3977 self->flags &= ~CF_SUSPENDED;
3978
3979void
3980_pool_handler (...)
3981 CODE:
3982 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3983
3984void
3985async_pool (SV *cv, ...)
3986 PROTOTYPE: &@
3987 PPCODE:
3988{
3989 HV *hv = (HV *)av_pop (av_async_pool);
3990 AV *av = newAV ();
3991 SV *cb = ST (0);
3992 int i;
3993
3994 av_extend (av, items - 2);
3995 for (i = 1; i < items; ++i)
3996 av_push (av, SvREFCNT_inc_NN (ST (i)));
3997
3998 if ((SV *)hv == &PL_sv_undef)
3999 {
4000 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4001 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4002 SvREFCNT_dec (sv);
4003 }
4004
4005 {
4006 struct coro *coro = SvSTATE_hv (hv);
4007
4008 assert (!coro->invoke_cb);
4009 assert (!coro->invoke_av);
4010 coro->invoke_cb = SvREFCNT_inc (cb);
4011 coro->invoke_av = av;
4012 }
4013
4014 api_ready (aTHX_ (SV *)hv);
4015
4016 if (GIMME_V != G_VOID)
4017 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4018 else
4019 SvREFCNT_dec (hv);
4020}
1314 4021
1315SV * 4022SV *
1316_get_state () 4023rouse_cb ()
4024 PROTOTYPE:
1317 CODE: 4025 CODE:
1318{ 4026 RETVAL = coro_new_rouse_cb (aTHX);
1319 struct io_state *data;
1320
1321 RETVAL = newSV (sizeof (struct io_state));
1322 data = (struct io_state *)SvPVX (RETVAL);
1323 SvCUR_set (RETVAL, sizeof (struct io_state));
1324 SvPOK_only (RETVAL);
1325
1326 data->errorno = errno;
1327 data->laststype = PL_laststype;
1328 data->laststatval = PL_laststatval;
1329 data->statcache = PL_statcache;
1330}
1331 OUTPUT: 4027 OUTPUT:
1332 RETVAL 4028 RETVAL
1333 4029
1334void 4030void
1335_set_state (char *data_) 4031rouse_wait (...)
4032 PROTOTYPE: ;$
4033 PPCODE:
4034 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4035
4036void
4037on_enter (SV *block)
4038 ALIAS:
4039 on_leave = 1
1336 PROTOTYPE: $ 4040 PROTOTYPE: &
1337 CODE: 4041 CODE:
1338{ 4042{
1339 struct io_state *data = (void *)data_; 4043 struct coro *coro = SvSTATE_current;
4044 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1340 4045
1341 errno = data->errorno; 4046 block = s_get_cv_croak (block);
1342 PL_laststype = data->laststype;
1343 PL_laststatval = data->laststatval;
1344 PL_statcache = data->statcache;
1345}
1346 4047
4048 if (!*avp)
4049 *avp = newAV ();
4050
4051 av_push (*avp, SvREFCNT_inc (block));
4052
4053 if (!ix)
4054 on_enterleave_call (aTHX_ block);
4055
4056 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4057 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4058 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4059}
4060
4061
4062MODULE = Coro::State PACKAGE = PerlIO::cede
4063
4064BOOT:
4065 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4066
4067
4068MODULE = Coro::State PACKAGE = Coro::Semaphore
4069
4070SV *
4071new (SV *klass, SV *count = 0)
4072 CODE:
4073{
4074 int semcnt = 1;
4075
4076 if (count)
4077 {
4078 SvGETMAGIC (count);
4079
4080 if (SvOK (count))
4081 semcnt = SvIV (count);
4082 }
4083
4084 RETVAL = sv_bless (
4085 coro_waitarray_new (aTHX_ semcnt),
4086 GvSTASH (CvGV (cv))
4087 );
4088}
4089 OUTPUT:
4090 RETVAL
4091
4092# helper for Coro::Channel and others
4093SV *
4094_alloc (int count)
4095 CODE:
4096 RETVAL = coro_waitarray_new (aTHX_ count);
4097 OUTPUT:
4098 RETVAL
4099
4100SV *
4101count (SV *self)
4102 CODE:
4103 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4104 OUTPUT:
4105 RETVAL
4106
4107void
4108up (SV *self, int adjust = 1)
4109 ALIAS:
4110 adjust = 1
4111 CODE:
4112 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4113
4114void
4115down (...)
4116 CODE:
4117 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4118
4119void
4120wait (...)
4121 CODE:
4122 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4123
4124void
4125try (SV *self)
4126 PPCODE:
4127{
4128 AV *av = (AV *)SvRV (self);
4129 SV *count_sv = AvARRAY (av)[0];
4130 IV count = SvIVX (count_sv);
4131
4132 if (count > 0)
4133 {
4134 --count;
4135 SvIVX (count_sv) = count;
4136 XSRETURN_YES;
4137 }
4138 else
4139 XSRETURN_NO;
4140}
4141
4142void
4143waiters (SV *self)
4144 PPCODE:
4145{
4146 AV *av = (AV *)SvRV (self);
4147 int wcount = AvFILLp (av) + 1 - 1;
4148
4149 if (GIMME_V == G_SCALAR)
4150 XPUSHs (sv_2mortal (newSViv (wcount)));
4151 else
4152 {
4153 int i;
4154 EXTEND (SP, wcount);
4155 for (i = 1; i <= wcount; ++i)
4156 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4157 }
4158}
4159
4160MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4161
4162void
4163_may_delete (SV *sem, int count, unsigned int extra_refs)
4164 PPCODE:
4165{
4166 AV *av = (AV *)SvRV (sem);
4167
4168 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4169 && AvFILLp (av) == 0 /* no waiters, just count */
4170 && SvIV (AvARRAY (av)[0]) == count)
4171 XSRETURN_YES;
4172
4173 XSRETURN_NO;
4174}
4175
4176MODULE = Coro::State PACKAGE = Coro::Signal
4177
4178SV *
4179new (SV *klass)
4180 CODE:
4181 RETVAL = sv_bless (
4182 coro_waitarray_new (aTHX_ 0),
4183 GvSTASH (CvGV (cv))
4184 );
4185 OUTPUT:
4186 RETVAL
4187
4188void
4189wait (...)
4190 CODE:
4191 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4192
4193void
4194broadcast (SV *self)
4195 CODE:
4196{
4197 AV *av = (AV *)SvRV (self);
4198 coro_signal_wake (aTHX_ av, AvFILLp (av));
4199}
4200
4201void
4202send (SV *self)
4203 CODE:
4204{
4205 AV *av = (AV *)SvRV (self);
4206
4207 if (AvFILLp (av))
4208 coro_signal_wake (aTHX_ av, 1);
4209 else
4210 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4211}
4212
4213IV
4214awaited (SV *self)
4215 CODE:
4216 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4217 OUTPUT:
4218 RETVAL
4219
4220
4221MODULE = Coro::State PACKAGE = Coro::AnyEvent
4222
4223BOOT:
4224 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4225
4226void
4227_schedule (...)
4228 CODE:
4229{
4230 static int incede;
4231
4232 api_cede_notself (aTHX);
4233
4234 ++incede;
4235 while (coro_nready >= incede && api_cede (aTHX))
4236 ;
4237
4238 sv_setsv (sv_activity, &PL_sv_undef);
4239 if (coro_nready >= incede)
4240 {
4241 PUSHMARK (SP);
4242 PUTBACK;
4243 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4244 }
4245
4246 --incede;
4247}
4248
4249
4250MODULE = Coro::State PACKAGE = Coro::AIO
4251
4252void
4253_register (char *target, char *proto, SV *req)
4254 CODE:
4255{
4256 SV *req_cv = s_get_cv_croak (req);
4257 /* newXSproto doesn't return the CV on 5.8 */
4258 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4259 sv_setpv ((SV *)slf_cv, proto);
4260 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4261}
4262
4263MODULE = Coro::State PACKAGE = Coro::Select
4264
4265void
4266patch_pp_sselect ()
4267 CODE:
4268 if (!coro_old_pp_sselect)
4269 {
4270 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4271 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4272 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4273 }
4274
4275void
4276unpatch_pp_sselect ()
4277 CODE:
4278 if (coro_old_pp_sselect)
4279 {
4280 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4281 coro_old_pp_sselect = 0;
4282 }
4283

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