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Comparing Coro/Coro/State.xs (file contents):
Revision 1.8 by root, Thu Jul 19 04:13:22 2001 UTC vs.
Revision 1.393 by root, Fri Apr 29 17:38:56 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
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#if 1 16#include "schmorp.h"
6# define CHK(x) (void *)0 17
18#include <stdio.h>
19#include <errno.h>
20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
7#else 32#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 33# include <inttypes.h> /* most portable stdint.h */
9#endif 34#endif
10 35
11#define MAY_FLUSH /* increases codesize */ 36#ifdef HAVE_MMAP
37# include <unistd.h>
38# include <sys/mman.h>
39# ifndef MAP_ANONYMOUS
40# ifdef MAP_ANON
41# define MAP_ANONYMOUS MAP_ANON
42# else
43# undef HAVE_MMAP
44# endif
45# endif
46# include <limits.h>
47# ifndef PAGESIZE
48# define PAGESIZE pagesize
49# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
50static long pagesize;
51# else
52# define BOOT_PAGESIZE (void)0
53# endif
54#else
55# define PAGESIZE 0
56# define BOOT_PAGESIZE (void)0
57#endif
12 58
13#define SUB_INIT "Coro::State::_newcoro" 59#if CORO_USE_VALGRIND
60# include <valgrind/valgrind.h>
61#endif
14 62
15#define SAVE_DEFAV 0x00000001 63/* the maximum number of idle cctx that will be pooled */
16#define SAVE_DEFSV 0x00000002 64static int cctx_max_idle = 4;
17#define SAVE_ERRSV 0x00000004
18 65
19#define SAVE_ALL -1 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
67# undef CORO_STACKGUARD
68#endif
20 69
70#ifndef CORO_STACKGUARD
71# define CORO_STACKGUARD 0
72#endif
73
74/* prefer perl internal functions over our own? */
75#ifndef CORO_PREFER_PERL_FUNCTIONS
76# define CORO_PREFER_PERL_FUNCTIONS 0
77#endif
78
79/* The next macros try to return the current stack pointer, in an as
80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
85# define dSTACKLEVEL volatile void *stacklevel
86# define STACKLEVEL ((void *)&stacklevel)
87#endif
88
89#define IN_DESTRUCT PL_dirty
90
91#if __GNUC__ >= 3
92# define attribute(x) __attribute__(x)
93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
95#else
96# define attribute(x)
97# define expect(expr,value) (expr)
98# define INLINE static
99#endif
100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
104#define NOINLINE attribute ((noinline))
105
106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
108
109#ifdef USE_ITHREADS
110# if CORO_PTHREAD
111static void *coro_thx;
112# endif
113#endif
114
115#ifdef __linux
116# include <time.h> /* for timespec */
117# include <syscall.h> /* for SYS_* */
118# ifdef SYS_clock_gettime
119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
120# define CORO_CLOCK_MONOTONIC 1
121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
122# endif
123#endif
124
125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131
132static U32 cctx_gen;
133static size_t cctx_stacksize = CORO_STACKSIZE;
134static struct CoroAPI coroapi;
135static AV *main_mainstack; /* used to differentiate between $main and others */
136static JMPENV *main_top_env;
137static HV *coro_state_stash, *coro_stash;
138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
149
150/* async_pool helper stuff */
151static SV *sv_pool_rss;
152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
157
158/* Coro::AnyEvent */
159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
166
167static struct coro_cctx *cctx_first;
168static int cctx_count, cctx_idle;
169
170enum {
171 CC_MAPPED = 0x01,
172 CC_NOREUSE = 0x02, /* throw this away after tracing */
173 CC_TRACE = 0x04,
174 CC_TRACE_SUB = 0x08, /* trace sub calls */
175 CC_TRACE_LINE = 0x10, /* trace each statement */
176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
177};
178
179/* this is a structure representing a c-level coroutine */
180typedef struct coro_cctx
181{
182 struct coro_cctx *next;
183
184 /* the stack */
185 void *sptr;
186 size_t ssize;
187
188 /* cpu state */
189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
191 JMPENV *top_env;
192 coro_context cctx;
193
194 U32 gen;
195#if CORO_USE_VALGRIND
196 int valgrind_id;
197#endif
198 unsigned char flags;
199} coro_cctx;
200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
205enum {
206 CF_RUNNING = 0x0001, /* coroutine is running */
207 CF_READY = 0x0002, /* coroutine is ready */
208 CF_NEW = 0x0004, /* has never been switched to */
209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
212};
213
214/* the structure where most of the perl state is stored, overlaid on the cxstack */
215typedef struct
216{
217 SV *defsv;
218 AV *defav;
219 SV *errsv;
220 SV *irsgv;
221 HV *hinthv;
222#define VAR(name,type) type name;
223# include "state.h"
224#undef VAR
225} perl_slots;
226
227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
228
229/* this is a structure representing a perl-level coroutine */
21struct coro { 230struct coro {
22 /* optionally saved, might be zero */ 231 /* the C coroutine allocated to this perl coroutine, if any */
23 AV *defav; 232 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 233
30 /* the stacks and related info (callchain etc..) */ 234 /* ready queue */
31 PERL_SI *curstackinfo; 235 struct coro *next_ready;
32 AV *curstack; 236
237 /* state data */
238 struct CoroSLF slf_frame; /* saved slf frame */
33 AV *mainstack; 239 AV *mainstack;
34 SV **stack_sp; 240 perl_slots *slot; /* basically the saved sp */
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 241
242 CV *startcv; /* the CV to execute */
57 /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
251
252 /* coro process data */
253 int prio;
254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
256
257 /* async_pool */
258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
271
272 /* linked list */
273 struct coro *next, *prev;
59}; 274};
60 275
61typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
63 278
64static HV *padlist_cache; 279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
65 283
66/* mostly copied from op.c:cv_clone2 */ 284/** Coro ********************************************************************/
67STATIC AV * 285
68clone_padlist (AV *protopadlist) 286#define CORO_PRIO_MAX 3
287#define CORO_PRIO_HIGH 1
288#define CORO_PRIO_NORMAL 0
289#define CORO_PRIO_LOW -1
290#define CORO_PRIO_IDLE -3
291#define CORO_PRIO_MIN -4
292
293/* for Coro.pm */
294static SV *coro_current;
295static SV *coro_readyhook;
296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
298static struct coro *coro_first;
299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
69{ 309{
70 AV *av; 310 dSP;
71 I32 ix; 311 PUSHMARK (SP - 4); /* fake argument list */
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 312 XPUSHs (coro_select_select);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 313 PUTBACK;
74 SV **pname = AvARRAY (protopad_name); 314
75 SV **ppad = AvARRAY (protopad); 315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
76 I32 fname = AvFILLp (protopad_name); 316 PL_op->op_flags |= OPf_STACKED;
77 I32 fpad = AvFILLp (protopad); 317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
372
373/** lowlevel stuff **********************************************************/
374
375static SV *
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV *
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV *
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504static AV *
505coro_derive_padlist (pTHX_ CV *cv)
506{
507 AV *padlist = CvPADLIST (cv);
78 AV *newpadlist, *newpad_name, *newpad; 508 AV *newpadlist, *newpad;
79 SV **npad;
80
81 newpad_name = newAV ();
82 for (ix = fname; ix >= 0; ix--)
83 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
84
85 newpad = newAV ();
86 av_fill (newpad, AvFILLp (protopad));
87 npad = AvARRAY (newpad);
88 509
89 newpadlist = newAV (); 510 newpadlist = newAV ();
90 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 512#if PERL_VERSION_ATLEAST (5,10,0)
513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
514#else
515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
516#endif
517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
518 --AvFILLp (padlist);
519
520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
92 av_store (newpadlist, 1, (SV *) newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
93 522
94 av = newAV (); /* will be @_ */ 523 return newpadlist;
95 av_extend (av, 0); 524}
96 av_store (newpad, 0, (SV *) av);
97 AvFLAGS (av) = AVf_REIFY;
98 525
99 for (ix = fpad; ix > 0; ix--) 526static void
527free_padlist (pTHX_ AV *padlist)
528{
529 /* may be during global destruction */
530 if (!IN_DESTRUCT)
100 { 531 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 532 I32 i = AvFILLp (padlist);
102 if (namesv && namesv != &PL_sv_undef) 533
534 while (i > 0) /* special-case index 0 */
103 { 535 {
104 char *name = SvPVX (namesv); /* XXX */ 536 /* we try to be extra-careful here */
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 537 AV *av = (AV *)AvARRAY (padlist)[i--];
106 { /* lexical from outside? */ 538 I32 j = AvFILLp (av);
107 npad[ix] = SvREFCNT_inc (ppad[ix]); 539
108 } 540 while (j >= 0)
109 else 541 SvREFCNT_dec (AvARRAY (av)[j--]);
110 { /* our own lexical */ 542
111 SV *sv; 543 AvFILLp (av) = -1;
112 if (*name == '&') 544 SvREFCNT_dec (av);
113 sv = SvREFCNT_inc (ppad[ix]);
114 else if (*name == '@')
115 sv = (SV *) newAV ();
116 else if (*name == '%')
117 sv = (SV *) newHV ();
118 else
119 sv = NEWSV (0, 0);
120 if (!SvPADBUSY (sv))
121 SvPADMY_on (sv);
122 npad[ix] = sv;
123 }
124 } 545 }
125 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 546
126 { 547 SvREFCNT_dec (AvARRAY (padlist)[0]);
127 npad[ix] = SvREFCNT_inc (ppad[ix]); 548
128 } 549 AvFILLp (padlist) = -1;
550 SvREFCNT_dec ((SV*)padlist);
551 }
552}
553
554static int
555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
556{
557 AV *padlist;
558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
563
564 /* casting is fun. */
565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
566 free_padlist (aTHX_ padlist);
567
568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
569
570 return 0;
571}
572
573static MGVTBL coro_cv_vtbl = {
574 0, 0, 0, 0,
575 coro_cv_free
576};
577
578/* the next two functions merely cache the padlists */
579static void
580get_padlist (pTHX_ CV *cv)
581{
582 MAGIC *mg = CORO_MAGIC_cv (cv);
583 AV *av;
584
585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
129 else 587 else
130 { 588 {
131 SV *sv = NEWSV (0, 0); 589#if CORO_PREFER_PERL_FUNCTIONS
132 SvPADTMP_on (sv); 590 /* this is probably cleaner? but also slower! */
133 npad[ix] = sv; 591 /* in practise, it seems to be less stable */
134 } 592 CV *cp = Perl_cv_clone (aTHX_ cv);
135 } 593 CvPADLIST (cv) = CvPADLIST (cp);
136 594 CvPADLIST (cp) = 0;
137#if 0 /* return -ENOTUNDERSTOOD */ 595 SvREFCNT_dec (cp);
138 /* Now that vars are all in place, clone nested closures. */ 596#else
139 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
140 for (ix = fpad; ix > 0; ix--) {
141 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
142 if (namesv
143 && namesv != &PL_sv_undef
144 && !(SvFLAGS(namesv) & SVf_FAKE)
145 && *SvPVX(namesv) == '&'
146 && CvCLONE(ppad[ix]))
147 {
148 CV *kid = cv_clone((CV*)ppad[ix]);
149 SvREFCNT_dec(ppad[ix]);
150 CvCLONE_on(kid);
151 SvPADMY_on(kid);
152 npad[ix] = (SV*)kid;
153 }
154 }
155#endif 598#endif
156 599 }
157 return newpadlist;
158} 600}
159 601
160#ifdef MAY_FLUSH 602static void
161STATIC AV * 603put_padlist (pTHX_ CV *cv)
162free_padlist (AV *padlist)
163{ 604{
164 /* may be during global destruction */ 605 MAGIC *mg = CORO_MAGIC_cv (cv);
165 if (SvREFCNT(padlist)) 606 AV *av;
607
608 if (expect_false (!mg))
609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
610
611 av = (AV *)mg->mg_obj;
612
613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
614 av_extend (av, AvFILLp (av) + 1);
615
616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
617}
618
619/** load & save, init *******************************************************/
620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
166 { 628 {
167 I32 i = AvFILLp(padlist); 629 SV *a = AvARRAY (c->swap_sv)[i++];
168 while (i >= 0) 630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
169 { 648 {
170 SV **svp = av_fetch(padlist, i--, FALSE); 649 /* swap sv_u */
171 SV *sv = svp ? *svp : Nullsv; 650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
172 if (sv) 651
173 SvREFCNT_dec(sv); 652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
174 } 663 }
175
176 SvREFCNT_dec((SV*)padlist);
177 }
178}
179#endif 664#endif
180
181/* the next two functions merely cache the padlists */
182STATIC void
183get_padlist (CV *cv)
184{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
186
187 if (he && AvFILLp ((AV *)*he) >= 0)
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
189 else
190 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
191}
192
193STATIC void
194put_padlist (CV *cv)
195{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
197
198 if (SvTYPE (*he) != SVt_PVAV)
199 { 665 }
200 SvREFCNT_dec (*he);
201 *he = (SV *)newAV ();
202 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205} 666}
206 667
207#ifdef MAY_FLUSH 668#define SWAP_SVS(coro) \
208STATIC void 669 if (expect_false ((coro)->swap_sv)) \
209flush_padlist_cache () 670 swap_svs (aTHX_ (coro))
210{
211 HV *hv = padlist_cache;
212 padlist_cache = newHV ();
213 671
214 if (hv_iterinit (hv))
215 {
216 HE *he;
217 AV *padlist;
218
219 while (!!(he = hv_iternext (hv)))
220 {
221 AV *av = (AV *)HeVAL(he);
222
223 /* casting is fun. */
224 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
225 free_padlist (padlist);
226 }
227 }
228
229 SvREFCNT_dec (hv);
230}
231#endif
232
233#define SB do {
234#define SE } while (0)
235
236#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
237#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
238
239#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240
241static void 672static void
673on_enterleave_call (pTHX_ SV *cb);
674
675static void
242load_state(pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
243{ 677{
244 PL_dowarn = c->dowarn; 678 perl_slots *slot = c->slot;
679 c->slot = 0;
245 680
246 PL_curstackinfo = c->curstackinfo;
247 PL_curstack = c->curstack;
248 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
249 PL_stack_sp = c->stack_sp;
250 PL_op = c->op;
251 PL_curpad = c->curpad;
252 PL_stack_base = c->stack_base;
253 PL_stack_max = c->stack_max;
254 PL_tmps_stack = c->tmps_stack;
255 PL_tmps_floor = c->tmps_floor;
256 PL_tmps_ix = c->tmps_ix;
257 PL_tmps_max = c->tmps_max;
258 PL_markstack = c->markstack;
259 PL_markstack_ptr = c->markstack_ptr;
260 PL_markstack_max = c->markstack_max;
261 PL_scopestack = c->scopestack;
262 PL_scopestack_ix = c->scopestack_ix;
263 PL_scopestack_max = c->scopestack_max;
264 PL_savestack = c->savestack;
265 PL_savestack_ix = c->savestack_ix;
266 PL_savestack_max = c->savestack_max;
267 PL_retstack = c->retstack;
268 PL_retstack_ix = c->retstack_ix;
269 PL_retstack_max = c->retstack_max;
270 PL_curcop = c->curcop;
271 682
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 683 GvSV (PL_defgv) = slot->defsv;
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 684 GvAV (PL_defgv) = slot->defav;
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 685 GvSV (PL_errgv) = slot->errsv;
686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
688
689 #define VAR(name,type) PL_ ## name = slot->name;
690 # include "state.h"
691 #undef VAR
275 692
276 { 693 {
277 dSP; 694 dSP;
695
278 CV *cv; 696 CV *cv;
279 697
280 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
282 { 700 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 702 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 703 CvPADLIST (cv) = (AV *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 704 }
296 705
297 PUTBACK; 706 PUTBACK;
298 } 707 }
299}
300 708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
729}
730
301static void 731static void
302save_state(pTHX_ Coro__State c, int flags) 732save_perl (pTHX_ Coro__State c)
303{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
304 { 755 {
305 dSP; 756 dSP;
306 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
758 PERL_CONTEXT *ccstk = cxstack;
307 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
308 PERL_CONTEXT *ccstk = cxstack;
309 760
310 /* 761 /*
311 * the worst thing you can imagine happens first - we have to save 762 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 763 * (and reinitialize) all cv's in the whole callchain :(
313 */ 764 */
314 765
315 PUSHs (Nullsv); 766 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
317 for (;;) 768 for (;;)
318 { 769 {
319 do 770 while (expect_true (cxix >= 0))
320 { 771 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
322 773
323 if (CxTYPE(cx) == CXt_SUB) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
324 { 775 {
325 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
777
326 if (CvDEPTH(cv)) 778 if (expect_true (CvDEPTH (cv)))
327 { 779 {
328#ifdef USE_THREADS
329 /*XPUSHs ((SV *)CvOWNER(cv));*/
330 /*CvOWNER(cv) = 0;*/
331 /*error must unlock this cv etc.. etc...*/
332#endif
333 EXTEND (SP, CvDEPTH(cv)*2); 780 EXTEND (SP, 3);
334
335 while (--CvDEPTH(cv))
336 {
337 /* this tells the restore code to increment CvDEPTH */
338 PUSHs (Nullsv);
339 PUSHs ((SV *)cv);
340 }
341
342 PUSHs ((SV *)CvPADLIST(cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
344 784
345 get_padlist (cv); /* this is a monster */ 785 CvDEPTH (cv) = 0;
786 get_padlist (aTHX_ cv);
346 } 787 }
347 } 788 }
348 else if (CxTYPE(cx) == CXt_FORMAT)
349 {
350 /* I never used formats, so how should I know how these are implemented? */
351 /* my bold guess is as a simple, plain sub... */
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353 }
354 } 789 }
355 while (cxix >= 0);
356 790
357 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
358 break; 792 break;
359 793
360 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
361 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
362 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
363 } 797 }
364 798
365 PUTBACK; 799 PUTBACK;
366 } 800 }
367 801
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 802 /* allocate some space on the context stack for our purposes */
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 803 /* we manually unroll here, as usually 2 slots is enough */
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 804 if (SLOT_COUNT >= 1) CXINC;
805 if (SLOT_COUNT >= 2) CXINC;
806 if (SLOT_COUNT >= 3) CXINC;
807 {
808 unsigned int i;
809 for (i = 3; i < SLOT_COUNT; ++i)
810 CXINC;
811 }
812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
371 813
372 c->dowarn = PL_dowarn;
373
374 c->curstackinfo = PL_curstackinfo;
375 c->curstack = PL_curstack;
376 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
377 c->stack_sp = PL_stack_sp; 815
378 c->op = PL_op; 816 {
379 c->curpad = PL_curpad; 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
818
819 slot->defav = GvAV (PL_defgv);
820 slot->defsv = DEFSV;
821 slot->errsv = ERRSV;
822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
824
825 #define VAR(name,type) slot->name = PL_ ## name;
826 # include "state.h"
827 #undef VAR
828 }
829}
830
831/*
832 * allocate various perl stacks. This is almost an exact copy
833 * of perl.c:init_stacks, except that it uses less memory
834 * on the (sometimes correct) assumption that coroutines do
835 * not usually need a lot of stackspace.
836 */
837#if CORO_PREFER_PERL_FUNCTIONS
838# define coro_init_stacks(thx) init_stacks ()
839#else
840static void
841coro_init_stacks (pTHX)
842{
843 PL_curstackinfo = new_stackinfo(32, 8);
844 PL_curstackinfo->si_type = PERLSI_MAIN;
845 PL_curstack = PL_curstackinfo->si_stack;
846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
847
848 PL_stack_base = AvARRAY(PL_curstack);
380 c->stack_base = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
381 c->stack_max = PL_stack_max; 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
382 c->tmps_stack = PL_tmps_stack; 851
383 c->tmps_floor = PL_tmps_floor; 852 New(50,PL_tmps_stack,32,SV*);
384 c->tmps_ix = PL_tmps_ix; 853 PL_tmps_floor = -1;
385 c->tmps_max = PL_tmps_max; 854 PL_tmps_ix = -1;
855 PL_tmps_max = 32;
856
857 New(54,PL_markstack,16,I32);
386 c->markstack = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
387 c->markstack_ptr = PL_markstack_ptr; 859 PL_markstack_max = PL_markstack + 16;
388 c->markstack_max = PL_markstack_max; 860
389 c->scopestack = PL_scopestack; 861#ifdef SET_MARK_OFFSET
390 c->scopestack_ix = PL_scopestack_ix; 862 SET_MARK_OFFSET;
391 c->scopestack_max = PL_scopestack_max; 863#endif
392 c->savestack = PL_savestack; 864
393 c->savestack_ix = PL_savestack_ix; 865 New(54,PL_scopestack,8,I32);
394 c->savestack_max = PL_savestack_max; 866 PL_scopestack_ix = 0;
395 c->retstack = PL_retstack; 867 PL_scopestack_max = 8;
396 c->retstack_ix = PL_retstack_ix; 868
397 c->retstack_max = PL_retstack_max; 869 New(54,PL_savestack,24,ANY);
398 c->curcop = PL_curcop; 870 PL_savestack_ix = 0;
871 PL_savestack_max = 24;
872
873#if !PERL_VERSION_ATLEAST (5,10,0)
874 New(54,PL_retstack,4,OP*);
875 PL_retstack_ix = 0;
876 PL_retstack_max = 4;
877#endif
399} 878}
879#endif
400 880
401/* 881/*
402 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
403 * still there is a memleak of 128 bytes...
404 */ 883 */
405STATIC void 884static void
406destroy_stacks(pTHX) 885coro_destruct_stacks (pTHX)
407{ 886{
408 /* is this ugly, I ask? */
409 while (PL_scopestack_ix)
410 LEAVE;
411
412 /* sure it is, but more important: is it correct?? :/ */
413 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
414 FREETMPS;
415
416 while (PL_curstackinfo->si_next) 887 while (PL_curstackinfo->si_next)
417 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
418 889
419 while (PL_curstackinfo) 890 while (PL_curstackinfo)
420 { 891 {
421 PERL_SI *p = PL_curstackinfo->si_prev; 892 PERL_SI *p = PL_curstackinfo->si_prev;
422 893
423 { 894 if (!IN_DESTRUCT)
424 dSP;
425 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
426 PUTBACK; /* possibly superfluous */
427 }
428
429 dounwind(-1);
430
431 SvREFCNT_dec(PL_curstackinfo->si_stack); 895 SvREFCNT_dec (PL_curstackinfo->si_stack);
896
432 Safefree(PL_curstackinfo->si_cxstack); 897 Safefree (PL_curstackinfo->si_cxstack);
433 Safefree(PL_curstackinfo); 898 Safefree (PL_curstackinfo);
434 PL_curstackinfo = p; 899 PL_curstackinfo = p;
435 } 900 }
436 901
437 Safefree(PL_tmps_stack); 902 Safefree (PL_tmps_stack);
438 Safefree(PL_markstack); 903 Safefree (PL_markstack);
439 Safefree(PL_scopestack); 904 Safefree (PL_scopestack);
440 Safefree(PL_savestack); 905 Safefree (PL_savestack);
906#if !PERL_VERSION_ATLEAST (5,10,0)
441 Safefree(PL_retstack); 907 Safefree (PL_retstack);
908#endif
442} 909}
443 910
444STATIC void 911#define CORO_RSS \
445transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 912 rss += sizeof (SYM (curstackinfo)); \
446{ 913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
447 dSP; 914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
448 919
449 if (prev != next) 920static size_t
450 { 921coro_rss (pTHX_ struct coro *coro)
451 /* 922{
452 * this could be done in newprocess which would lead to 923 size_t rss = sizeof (*coro);
453 * extremely elegant and fast (just SAVE/LOAD) 924
454 * code here, but lazy allocation of stacks has also
455 * some virtues and the overhead of the if() is nil.
456 */
457 if (next->mainstack) 925 if (coro->mainstack)
926 {
927 if (coro->flags & CF_RUNNING)
458 { 928 {
459 SAVE (prev, flags); 929 #define SYM(sym) PL_ ## sym
460 LOAD (next); 930 CORO_RSS;
461 /* mark this state as in-use */ 931 #undef SYM
462 next->mainstack = 0;
463 next->tmps_ix = -2;
464 }
465 else if (next->tmps_ix == -2)
466 {
467 croak ("tried to transfer to running coroutine");
468 } 932 }
469 else 933 else
470 { 934 {
935 #define SYM(sym) coro->slot->sym
936 CORO_RSS;
937 #undef SYM
471 /* 938 }
939 }
940
941 return rss;
942}
943
944/** coroutine stack handling ************************************************/
945
946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
948static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
949
950/* apparently < 5.8.8 */
951#ifndef MgPV_nolen_const
952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
954 (const char*)(mg)->mg_ptr)
955#endif
956
957/*
958 * This overrides the default magic get method of %SIG elements.
959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
960 * and instead of trying to save and restore the hash elements, we just provide
961 * readback here.
962 */
963static int
964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
965{
966 const char *s = MgPV_nolen_const (mg);
967
968 if (*s == '_')
969 {
970 SV **svp = 0;
971
972 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
973 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
974
975 if (svp)
976 {
977 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
978 return 0;
979 }
980 }
981
982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
983}
984
985static int
986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
987{
988 const char *s = MgPV_nolen_const (mg);
989
990 if (*s == '_')
991 {
992 SV **svp = 0;
993
994 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
996
997 if (svp)
998 {
999 SV *old = *svp;
1000 *svp = 0;
1001 SvREFCNT_dec (old);
1002 return 0;
1003 }
1004 }
1005
1006 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1007}
1008
1009static int
1010coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1011{
1012 const char *s = MgPV_nolen_const (mg);
1013
1014 if (*s == '_')
1015 {
1016 SV **svp = 0;
1017
1018 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1020
1021 if (svp)
1022 {
1023 SV *old = *svp;
1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1025 SvREFCNT_dec (old);
1026 return 0;
1027 }
1028 }
1029
1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1031}
1032
1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
1040static int
1041slf_check_nop (pTHX_ struct CoroSLF *frame)
1042{
1043 return 0;
1044}
1045
1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
1055init_perl (pTHX_ struct coro *coro)
1056{
1057 /*
472 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
473 */ 1059 */
1060 coro_init_stacks (aTHX);
1061
1062 PL_runops = RUNOPS_DEFAULT;
1063 PL_curcop = &PL_compiling;
1064 PL_in_eval = EVAL_NULL;
1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
1069 PL_curpm = 0;
1070 PL_curpad = 0;
1071 PL_localizing = 0;
1072 PL_restartop = 0;
1073#if PERL_VERSION_ATLEAST (5,10,0)
1074 PL_parser = 0;
1075#endif
1076 PL_hints = 0;
1077
1078 /* recreate the die/warn hooks */
1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1081
1082 GvSV (PL_defgv) = newSV (0);
1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
1084 GvSV (PL_errgv) = newSV (0);
1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
1087 PL_rs = newSVsv (GvSV (irsgv));
1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1089
1090 {
1091 dSP;
474 UNOP myop; 1092 UNOP myop;
475 1093
476 SAVE (prev, -1); /* first get rid of the old state */
477
478 init_stacks (); /* from perl.c */
479 SPAGAIN;
480
481 PL_op = (OP *)&myop;
482 /*PL_curcop = 0;*/
483 SvREFCNT_dec (GvAV (PL_defgv));
484 GvAV (PL_defgv) = next->args;
485
486 Zero(&myop, 1, UNOP); 1094 Zero (&myop, 1, UNOP);
487 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
488 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
489 1098
1099 PUSHMARK (SP);
1100 PUSHs ((SV *)coro->startcv);
1101 PUTBACK;
1102 PL_op = (OP *)&myop;
1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1104 }
1105
1106 /* this newly created coroutine might be run on an existing cctx which most
1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1108 */
1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
1132static void
1133coro_unwind_stacks (pTHX)
1134{
1135 if (!IN_DESTRUCT)
1136 {
1137 /* restore all saved variables and stuff */
1138 LEAVE_SCOPE (0);
1139 assert (PL_tmps_floor == -1);
1140
1141 /* free all temporaries */
1142 FREETMPS;
1143 assert (PL_tmps_ix == -1);
1144
1145 /* unwind all extra stacks */
1146 POPSTACK_TO (PL_mainstack);
1147
1148 /* unwind main stack */
1149 dounwind (-1);
1150 }
1151}
1152
1153static void
1154destroy_perl (pTHX_ struct coro *coro)
1155{
1156 SV *svf [9];
1157
1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 load_perl (aTHX_ coro);
1165
1166 coro_unwind_stacks (aTHX);
1167 coro_destruct_stacks (aTHX);
1168
1169 /* restore swapped sv's */
1170 SWAP_SVS (coro);
1171
1172 // now save some sv's to be free'd later
1173 svf [0] = GvSV (PL_defgv);
1174 svf [1] = (SV *)GvAV (PL_defgv);
1175 svf [2] = GvSV (PL_errgv);
1176 svf [3] = (SV *)PL_defoutgv;
1177 svf [4] = PL_rs;
1178 svf [5] = GvSV (irsgv);
1179 svf [6] = (SV *)GvHV (PL_hintgv);
1180 svf [7] = PL_diehook;
1181 svf [8] = PL_warnhook;
1182 assert (9 == sizeof (svf) / sizeof (*svf));
1183
1184 load_perl (aTHX_ current);
1185 }
1186
1187 {
1188 unsigned int i;
1189
1190 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1191 SvREFCNT_dec (svf [i]);
1192
1193 SvREFCNT_dec (coro->saved_deffh);
1194 SvREFCNT_dec (coro->rouse_cb);
1195 SvREFCNT_dec (coro->invoke_cb);
1196 SvREFCNT_dec (coro->invoke_av);
1197 }
1198}
1199
1200INLINE void
1201free_coro_mortal (pTHX)
1202{
1203 if (expect_true (coro_mortal))
1204 {
1205 SvREFCNT_dec (coro_mortal);
1206 coro_mortal = 0;
1207 }
1208}
1209
1210static int
1211runops_trace (pTHX)
1212{
1213 COP *oldcop = 0;
1214 int oldcxix = -2;
1215
1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1217 {
1218 PERL_ASYNC_CHECK ();
1219
1220 if (cctx_current->flags & CC_TRACE_ALL)
1221 {
1222 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1223 {
1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1225 SV **bot, **top;
1226 AV *av = newAV (); /* return values */
1227 SV **cb;
1228 dSP;
1229
1230 GV *gv = CvGV (cx->blk_sub.cv);
1231 SV *fullname = sv_2mortal (newSV (0));
1232 if (isGV (gv))
1233 gv_efullname3 (fullname, gv, 0);
1234
1235 bot = PL_stack_base + cx->blk_oldsp + 1;
1236 top = cx->blk_gimme == G_ARRAY ? SP + 1
1237 : cx->blk_gimme == G_SCALAR ? bot + 1
1238 : bot;
1239
1240 av_extend (av, top - bot);
1241 while (bot < top)
1242 av_push (av, SvREFCNT_inc_NN (*bot++));
1243
1244 PL_runops = RUNOPS_DEFAULT;
1245 ENTER;
1246 SAVETMPS;
1247 EXTEND (SP, 3);
1248 PUSHMARK (SP);
1249 PUSHs (&PL_sv_no);
1250 PUSHs (fullname);
1251 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1252 PUTBACK;
1253 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1254 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1255 SPAGAIN;
1256 FREETMPS;
1257 LEAVE;
1258 PL_runops = runops_trace;
1259 }
1260
1261 if (oldcop != PL_curcop)
1262 {
1263 oldcop = PL_curcop;
1264
1265 if (PL_curcop != &PL_compiling)
1266 {
1267 SV **cb;
1268
1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1270 {
1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1272
1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1274 {
1275 dSP;
1276 GV *gv = CvGV (cx->blk_sub.cv);
1277 SV *fullname = sv_2mortal (newSV (0));
1278
1279 if (isGV (gv))
1280 gv_efullname3 (fullname, gv, 0);
1281
1282 PL_runops = RUNOPS_DEFAULT;
1283 ENTER;
1284 SAVETMPS;
1285 EXTEND (SP, 3);
1286 PUSHMARK (SP);
1287 PUSHs (&PL_sv_yes);
1288 PUSHs (fullname);
1289 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1290 PUTBACK;
1291 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1292 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1293 SPAGAIN;
1294 FREETMPS;
1295 LEAVE;
1296 PL_runops = runops_trace;
1297 }
1298
1299 oldcxix = cxstack_ix;
1300 }
1301
1302 if (cctx_current->flags & CC_TRACE_LINE)
1303 {
1304 dSP;
1305
1306 PL_runops = RUNOPS_DEFAULT;
1307 ENTER;
1308 SAVETMPS;
1309 EXTEND (SP, 3);
1310 PL_runops = RUNOPS_DEFAULT;
1311 PUSHMARK (SP);
1312 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1313 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1314 PUTBACK;
1315 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1316 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1317 SPAGAIN;
1318 FREETMPS;
1319 LEAVE;
1320 PL_runops = runops_trace;
1321 }
1322 }
1323 }
1324 }
1325 }
1326
1327 TAINT_NOT;
1328 return 0;
1329}
1330
1331static struct CoroSLF cctx_ssl_frame;
1332
1333static void
1334slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1335{
1336 ta->prev = 0;
1337}
1338
1339static int
1340slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1341{
1342 *frame = cctx_ssl_frame;
1343
1344 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1345}
1346
1347/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1348static void NOINLINE
1349cctx_prepare (pTHX)
1350{
1351 PL_top_env = &PL_start_env;
1352
1353 if (cctx_current->flags & CC_TRACE)
1354 PL_runops = runops_trace;
1355
1356 /* we already must be executing an SLF op, there is no other valid way
1357 * that can lead to creation of a new cctx */
1358 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1359 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1360
1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1362 cctx_ssl_frame = slf_frame;
1363
1364 slf_frame.prepare = slf_prepare_set_stacklevel;
1365 slf_frame.check = slf_check_set_stacklevel;
1366}
1367
1368/* the tail of transfer: execute stuff we can only do after a transfer */
1369INLINE void
1370transfer_tail (pTHX)
1371{
1372 free_coro_mortal (aTHX);
1373}
1374
1375/*
1376 * this is a _very_ stripped down perl interpreter ;)
1377 */
1378static void
1379cctx_run (void *arg)
1380{
1381#ifdef USE_ITHREADS
1382# if CORO_PTHREAD
1383 PERL_SET_CONTEXT (coro_thx);
1384# endif
1385#endif
1386 {
1387 dTHX;
1388
1389 /* normally we would need to skip the entersub here */
1390 /* not doing so will re-execute it, which is exactly what we want */
1391 /* PL_nop = PL_nop->op_next */
1392
1393 /* inject a fake subroutine call to cctx_init */
1394 cctx_prepare (aTHX);
1395
1396 /* cctx_run is the alternative tail of transfer() */
1397 transfer_tail (aTHX);
1398
1399 /* somebody or something will hit me for both perl_run and PL_restartop */
1400 PL_restartop = PL_op;
1401 perl_run (PL_curinterp);
1402 /*
1403 * Unfortunately, there is no way to get at the return values of the
1404 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1405 * runtime errors here, as this is just a random interpreter, not a thread.
1406 */
1407
1408 /*
1409 * If perl-run returns we assume exit() was being called or the coro
1410 * fell off the end, which seems to be the only valid (non-bug)
1411 * reason for perl_run to return. We try to exit by jumping to the
1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
1413 * coroutine as Coro has no such concept.
1414 * This actually isn't valid with the pthread backend, but OSes requiring
1415 * that backend are too broken to do it in a standards-compliant way.
1416 */
1417 PL_top_env = main_top_env;
1418 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1419 }
1420}
1421
1422static coro_cctx *
1423cctx_new ()
1424{
1425 coro_cctx *cctx;
1426
1427 ++cctx_count;
1428 New (0, cctx, 1, coro_cctx);
1429
1430 cctx->gen = cctx_gen;
1431 cctx->flags = 0;
1432 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1433
1434 return cctx;
1435}
1436
1437/* create a new cctx only suitable as source */
1438static coro_cctx *
1439cctx_new_empty ()
1440{
1441 coro_cctx *cctx = cctx_new ();
1442
1443 cctx->sptr = 0;
1444 coro_create (&cctx->cctx, 0, 0, 0, 0);
1445
1446 return cctx;
1447}
1448
1449/* create a new cctx suitable as destination/running a perl interpreter */
1450static coro_cctx *
1451cctx_new_run ()
1452{
1453 coro_cctx *cctx = cctx_new ();
1454 void *stack_start;
1455 size_t stack_size;
1456
1457#if HAVE_MMAP
1458 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1459 /* mmap supposedly does allocate-on-write for us */
1460 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1461
1462 if (cctx->sptr != (void *)-1)
1463 {
1464 #if CORO_STACKGUARD
1465 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1466 #endif
1467 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1468 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1469 cctx->flags |= CC_MAPPED;
1470 }
1471 else
1472#endif
1473 {
1474 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1475 New (0, cctx->sptr, cctx_stacksize, long);
1476
1477 if (!cctx->sptr)
1478 {
1479 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1480 _exit (EXIT_FAILURE);
1481 }
1482
1483 stack_start = cctx->sptr;
1484 stack_size = cctx->ssize;
1485 }
1486
1487 #if CORO_USE_VALGRIND
1488 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1489 #endif
1490
1491 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1492
1493 return cctx;
1494}
1495
1496static void
1497cctx_destroy (coro_cctx *cctx)
1498{
1499 if (!cctx)
1500 return;
1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
1504 --cctx_count;
1505 coro_destroy (&cctx->cctx);
1506
1507 /* coro_transfer creates new, empty cctx's */
1508 if (cctx->sptr)
1509 {
1510 #if CORO_USE_VALGRIND
1511 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1512 #endif
1513
1514#if HAVE_MMAP
1515 if (cctx->flags & CC_MAPPED)
1516 munmap (cctx->sptr, cctx->ssize);
1517 else
1518#endif
1519 Safefree (cctx->sptr);
1520 }
1521
1522 Safefree (cctx);
1523}
1524
1525/* wether this cctx should be destructed */
1526#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1527
1528static coro_cctx *
1529cctx_get (pTHX)
1530{
1531 while (expect_true (cctx_first))
1532 {
1533 coro_cctx *cctx = cctx_first;
1534 cctx_first = cctx->next;
1535 --cctx_idle;
1536
1537 if (expect_true (!CCTX_EXPIRED (cctx)))
1538 return cctx;
1539
1540 cctx_destroy (cctx);
1541 }
1542
1543 return cctx_new_run ();
1544}
1545
1546static void
1547cctx_put (coro_cctx *cctx)
1548{
1549 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1550
1551 /* free another cctx if overlimit */
1552 if (expect_false (cctx_idle >= cctx_max_idle))
1553 {
1554 coro_cctx *first = cctx_first;
1555 cctx_first = first->next;
1556 --cctx_idle;
1557
1558 cctx_destroy (first);
1559 }
1560
1561 ++cctx_idle;
1562 cctx->next = cctx_first;
1563 cctx_first = cctx;
1564}
1565
1566/** coroutine switching *****************************************************/
1567
1568static void
1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
1570{
1571 /* TODO: throwing up here is considered harmful */
1572
1573 if (expect_true (prev != next))
1574 {
1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1576 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1577
1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1579 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1580
1581#if !PERL_VERSION_ATLEAST (5,10,0)
1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1583 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1584#endif
1585 }
1586}
1587
1588/* always use the TRANSFER macro */
1589static void NOINLINE /* noinline so we have a fixed stackframe */
1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1591{
1592 dSTACKLEVEL;
1593
1594 /* sometimes transfer is only called to set idle_sp */
1595 if (expect_false (!prev))
1596 {
1597 cctx_current->idle_sp = STACKLEVEL;
1598 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1599 }
1600 else if (expect_true (prev != next))
1601 {
1602 coro_cctx *cctx_prev;
1603
1604 if (expect_false (prev->flags & CF_NEW))
1605 {
1606 /* create a new empty/source context */
1607 prev->flags &= ~CF_NEW;
1608 prev->flags |= CF_RUNNING;
1609 }
1610
1611 prev->flags &= ~CF_RUNNING;
1612 next->flags |= CF_RUNNING;
1613
1614 /* first get rid of the old state */
1615 save_perl (aTHX_ prev);
1616
1617 if (expect_false (next->flags & CF_NEW))
1618 {
1619 /* need to start coroutine */
1620 next->flags &= ~CF_NEW;
1621 /* setup coroutine call */
1622 init_perl (aTHX_ next);
1623 }
1624 else
1625 load_perl (aTHX_ next);
1626
1627 /* possibly untie and reuse the cctx */
1628 if (expect_true (
1629 cctx_current->idle_sp == STACKLEVEL
1630 && !(cctx_current->flags & CC_TRACE)
1631 && !force_cctx
1632 ))
1633 {
1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1636
1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1640 if (expect_true (!next->cctx))
1641 next->cctx = cctx_get (aTHX);
1642
1643 cctx_put (cctx_current);
1644 }
1645 else
1646 prev->cctx = cctx_current;
1647
1648 ++next->usecount;
1649
1650 cctx_prev = cctx_current;
1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1652
1653 next->cctx = 0;
1654
1655 if (expect_false (cctx_prev != cctx_current))
1656 {
1657 cctx_prev->top_env = PL_top_env;
1658 PL_top_env = cctx_current->top_env;
1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1660 }
1661
1662 transfer_tail (aTHX);
1663 }
1664}
1665
1666#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1667#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1668
1669/** high level stuff ********************************************************/
1670
1671static int
1672coro_state_destroy (pTHX_ struct coro *coro)
1673{
1674 if (coro->flags & CF_DESTROYED)
1675 return 0;
1676
1677 if (coro->on_destroy && !PL_dirty)
1678 coro->on_destroy (aTHX_ coro);
1679
1680 /*
1681 * The on_destroy above most likely is from an SLF call.
1682 * Since by definition the SLF call will not finish when we destroy
1683 * the coro, we will have to force-finish it here, otherwise
1684 * cleanup functions cannot call SLF functions.
1685 */
1686 coro->slf_frame.prepare = 0;
1687
1688 coro->flags |= CF_DESTROYED;
1689
1690 if (coro->flags & CF_READY)
1691 {
1692 /* reduce nready, as destroying a ready coro effectively unreadies it */
1693 /* alternative: look through all ready queues and remove the coro */
1694 --coro_nready;
1695 }
1696 else
1697 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1698
1699 if (coro->mainstack
1700 && coro->mainstack != main_mainstack
1701 && coro->slot
1702 && !PL_dirty)
1703 destroy_perl (aTHX_ coro);
1704
1705 if (coro->next) coro->next->prev = coro->prev;
1706 if (coro->prev) coro->prev->next = coro->next;
1707 if (coro == coro_first) coro_first = coro->next;
1708
1709 cctx_destroy (coro->cctx);
1710 SvREFCNT_dec (coro->startcv);
1711 SvREFCNT_dec (coro->args);
1712 SvREFCNT_dec (coro->swap_sv);
1713 SvREFCNT_dec (CORO_THROW);
1714
1715 return 1;
1716}
1717
1718static int
1719coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1720{
1721 struct coro *coro = (struct coro *)mg->mg_ptr;
1722 mg->mg_ptr = 0;
1723
1724 coro->hv = 0;
1725
1726 if (--coro->refcnt < 0)
1727 {
1728 coro_state_destroy (aTHX_ coro);
1729 Safefree (coro);
1730 }
1731
1732 return 0;
1733}
1734
1735static int
1736coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1737{
1738 struct coro *coro = (struct coro *)mg->mg_ptr;
1739
1740 ++coro->refcnt;
1741
1742 return 0;
1743}
1744
1745static MGVTBL coro_state_vtbl = {
1746 0, 0, 0, 0,
1747 coro_state_free,
1748 0,
1749#ifdef MGf_DUP
1750 coro_state_dup,
1751#else
1752# define MGf_DUP 0
1753#endif
1754};
1755
1756static void
1757prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1758{
1759 ta->prev = SvSTATE (prev_sv);
1760 ta->next = SvSTATE (next_sv);
1761 TRANSFER_CHECK (*ta);
1762}
1763
1764static void
1765api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1766{
1767 struct coro_transfer_args ta;
1768
1769 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1770 TRANSFER (ta, 1);
1771}
1772
1773/** Coro ********************************************************************/
1774
1775INLINE void
1776coro_enq (pTHX_ struct coro *coro)
1777{
1778 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1779
1780 SvREFCNT_inc_NN (coro->hv);
1781
1782 coro->next_ready = 0;
1783 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1784 ready [1] = coro;
1785}
1786
1787INLINE struct coro *
1788coro_deq (pTHX)
1789{
1790 int prio;
1791
1792 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1793 {
1794 struct coro **ready = coro_ready [prio];
1795
1796 if (ready [0])
1797 {
1798 struct coro *coro = ready [0];
1799 ready [0] = coro->next_ready;
1800 return coro;
1801 }
1802 }
1803
1804 return 0;
1805}
1806
1807static void
1808invoke_sv_ready_hook_helper (void)
1809{
1810 dTHX;
1811 dSP;
1812
1813 ENTER;
1814 SAVETMPS;
1815
1816 PUSHMARK (SP);
1817 PUTBACK;
1818 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1819
1820 FREETMPS;
1821 LEAVE;
1822}
1823
1824static int
1825api_ready (pTHX_ SV *coro_sv)
1826{
1827 struct coro *coro = SvSTATE (coro_sv);
1828
1829 if (coro->flags & CF_READY)
1830 return 0;
1831
1832 coro->flags |= CF_READY;
1833
1834 coro_enq (aTHX_ coro);
1835
1836 if (!coro_nready++)
1837 if (coroapi.readyhook)
1838 coroapi.readyhook ();
1839
1840 return 1;
1841}
1842
1843static int
1844api_is_ready (pTHX_ SV *coro_sv)
1845{
1846 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1847}
1848
1849/* expects to own a reference to next->hv */
1850INLINE void
1851prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1852{
1853 SV *prev_sv = SvRV (coro_current);
1854
1855 ta->prev = SvSTATE_hv (prev_sv);
1856 ta->next = next;
1857
1858 TRANSFER_CHECK (*ta);
1859
1860 SvRV_set (coro_current, (SV *)next->hv);
1861
1862 free_coro_mortal (aTHX);
1863 coro_mortal = prev_sv;
1864}
1865
1866static void
1867prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1868{
1869 for (;;)
1870 {
1871 struct coro *next = coro_deq (aTHX);
1872
1873 if (expect_true (next))
1874 {
1875 /* cannot transfer to destroyed coros, skip and look for next */
1876 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1877 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1878 else
1879 {
1880 next->flags &= ~CF_READY;
1881 --coro_nready;
1882
1883 prepare_schedule_to (aTHX_ ta, next);
1884 break;
1885 }
1886 }
1887 else
1888 {
1889 /* nothing to schedule: call the idle handler */
1890 if (SvROK (sv_idle)
1891 && SvOBJECT (SvRV (sv_idle)))
1892 {
1893 if (SvRV (sv_idle) == SvRV (coro_current))
1894 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1895
1896 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1897 api_ready (aTHX_ SvRV (sv_idle));
1898 --coro_nready;
1899 }
1900 else
1901 {
1902 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1903 dSP;
1904
1905 ENTER;
1906 SAVETMPS;
1907
1908 PUSHMARK (SP);
1909 PUTBACK;
1910 call_sv (sv_idle, G_VOID | G_DISCARD);
1911
1912 FREETMPS;
1913 LEAVE;
1914 }
1915 }
1916 }
1917}
1918
1919INLINE void
1920prepare_cede (pTHX_ struct coro_transfer_args *ta)
1921{
1922 api_ready (aTHX_ coro_current);
1923 prepare_schedule (aTHX_ ta);
1924}
1925
1926INLINE void
1927prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1928{
1929 SV *prev = SvRV (coro_current);
1930
1931 if (coro_nready)
1932 {
1933 prepare_schedule (aTHX_ ta);
1934 api_ready (aTHX_ prev);
1935 }
1936 else
1937 prepare_nop (aTHX_ ta);
1938}
1939
1940static void
1941api_schedule (pTHX)
1942{
1943 struct coro_transfer_args ta;
1944
1945 prepare_schedule (aTHX_ &ta);
1946 TRANSFER (ta, 1);
1947}
1948
1949static void
1950api_schedule_to (pTHX_ SV *coro_sv)
1951{
1952 struct coro_transfer_args ta;
1953 struct coro *next = SvSTATE (coro_sv);
1954
1955 SvREFCNT_inc_NN (coro_sv);
1956 prepare_schedule_to (aTHX_ &ta, next);
1957}
1958
1959static int
1960api_cede (pTHX)
1961{
1962 struct coro_transfer_args ta;
1963
1964 prepare_cede (aTHX_ &ta);
1965
1966 if (expect_true (ta.prev != ta.next))
1967 {
1968 TRANSFER (ta, 1);
1969 return 1;
1970 }
1971 else
1972 return 0;
1973}
1974
1975static int
1976api_cede_notself (pTHX)
1977{
1978 if (coro_nready)
1979 {
1980 struct coro_transfer_args ta;
1981
1982 prepare_cede_notself (aTHX_ &ta);
1983 TRANSFER (ta, 1);
1984 return 1;
1985 }
1986 else
1987 return 0;
1988}
1989
1990static void
1991api_trace (pTHX_ SV *coro_sv, int flags)
1992{
1993 struct coro *coro = SvSTATE (coro_sv);
1994
1995 if (coro->flags & CF_RUNNING)
1996 croak ("cannot enable tracing on a running coroutine, caught");
1997
1998 if (flags & CC_TRACE)
1999 {
2000 if (!coro->cctx)
2001 coro->cctx = cctx_new_run ();
2002 else if (!(coro->cctx->flags & CC_TRACE))
2003 croak ("cannot enable tracing on coroutine with custom stack, caught");
2004
2005 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2006 }
2007 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2008 {
2009 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2010
2011 if (coro->flags & CF_RUNNING)
2012 PL_runops = RUNOPS_DEFAULT;
2013 else
2014 coro->slot->runops = RUNOPS_DEFAULT;
2015 }
2016}
2017
2018static void
2019coro_call_on_destroy (pTHX_ struct coro *coro)
2020{
2021 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2022
2023 if (on_destroyp)
2024 {
2025 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2026 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2027 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2028
2029 while (AvFILLp (on_destroy) >= 0)
2030 {
2031 dSP; /* don't disturb outer sp */
2032 SV *cb = av_pop (on_destroy);
2033
490 PUSHMARK(SP); 2034 PUSHMARK (SP);
491 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); 2035
492 /* 2036 if (statusp)
493 * the next line is slightly wrong, as PL_op->op_next
494 * is actually being executed so we skip the first op.
495 * that doesn't matter, though, since it is only
496 * pp_nextstate and we never return...
497 * ah yes, and I don't care anyways ;)
498 */ 2037 {
2038 int i;
2039 EXTEND (SP, AvFILLp (status) + 1);
2040
2041 for (i = 0; i <= AvFILLp (status); ++i)
2042 PUSHs (AvARRAY (status)[i]);
2043 }
2044
499 PUTBACK; 2045 PUTBACK;
500 PL_op = pp_entersub(aTHX); 2046 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
501 SPAGAIN;
502
503 ENTER; /* necessary e.g. for dounwind */
504 } 2047 }
505 } 2048 }
506} 2049}
507 2050
2051static void
2052coro_set_status (HV *coro_hv, SV **arg, int items)
2053{
2054 AV *av = newAV ();
2055
2056 /* items are actually not so common, so optimise for this case */
2057 if (items)
2058 {
2059 int i;
2060
2061 av_extend (av, items - 1);
2062
2063 for (i = 0; i < items; ++i)
2064 av_push (av, SvREFCNT_inc_NN (arg [i]));
2065 }
2066
2067 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2068}
2069
2070static void
2071slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2072{
2073 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2074 api_ready (aTHX_ sv_manager);
2075
2076 frame->prepare = prepare_schedule;
2077 frame->check = slf_check_repeat;
2078
2079 /* as a minor optimisation, we could unwind all stacks here */
2080 /* but that puts extra pressure on pp_slf, and is not worth much */
2081 /*coro_unwind_stacks (aTHX);*/
2082}
2083
2084static void
2085slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2086{
2087 HV *coro_hv = (HV *)SvRV (coro_current);
2088
2089 coro_set_status (coro_hv, arg, items);
2090 slf_init_terminate_cancel_common (frame, coro_hv);
2091}
2092
2093static void
2094slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2095{
2096 HV *coro_hv;
2097 struct coro *coro;
2098
2099 if (items <= 0)
2100 croak ("Coro::cancel called without coro object,");
2101
2102 coro = SvSTATE (arg [0]);
2103 coro_hv = coro->hv;
2104
2105 coro_set_status (coro_hv, arg + 1, items - 1);
2106
2107 if (expect_false (coro->flags & CF_NOCANCEL))
2108 {
2109 /* coro currently busy cancelling something, so just notify it */
2110 coro->slf_frame.data = (void *)coro;
2111
2112 frame->prepare = prepare_nop;
2113 frame->check = slf_check_nop;
2114 }
2115 else if (coro_hv == (HV *)SvRV (coro_current))
2116 {
2117 /* cancelling the current coro is allowed, and equals terminate */
2118 slf_init_terminate_cancel_common (frame, coro_hv);
2119 }
2120 else
2121 {
2122 struct coro *self = SvSTATE_current;
2123
2124 /* otherwise we cancel directly, purely for speed reasons
2125 * unfortunately, this requires some magic trickery, as
2126 * somebody else could cancel us, so we have to fight the cancellation.
2127 * this is ugly, and hopefully fully worth the extra speed.
2128 * besides, I can't get the slow-but-safe version working...
2129 */
2130 slf_frame.data = 0;
2131 self->flags |= CF_NOCANCEL;
2132
2133 coro_state_destroy (aTHX_ coro);
2134 coro_call_on_destroy (aTHX_ coro);
2135
2136 self->flags &= ~CF_NOCANCEL;
2137
2138 if (slf_frame.data)
2139 {
2140 /* while we were busy we have been cancelled, so terminate */
2141 slf_init_terminate_cancel_common (frame, self->hv);
2142 }
2143 else
2144 {
2145 frame->prepare = prepare_nop;
2146 frame->check = slf_check_nop;
2147 }
2148 }
2149}
2150
2151/*****************************************************************************/
2152/* async pool handler */
2153
2154static int
2155slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2156{
2157 HV *hv = (HV *)SvRV (coro_current);
2158 struct coro *coro = (struct coro *)frame->data;
2159
2160 if (!coro->invoke_cb)
2161 return 1; /* loop till we have invoke */
2162 else
2163 {
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2168
2169 {
2170 dSP;
2171 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2172 PUTBACK;
2173 }
2174
2175 SvREFCNT_dec (GvAV (PL_defgv));
2176 GvAV (PL_defgv) = coro->invoke_av;
2177 coro->invoke_av = 0;
2178
2179 return 0;
2180 }
2181}
2182
2183static void
2184slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *hv = (HV *)SvRV (coro_current);
2187 struct coro *coro = SvSTATE_hv ((SV *)hv);
2188
2189 if (expect_true (coro->saved_deffh))
2190 {
2191 /* subsequent iteration */
2192 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2193 coro->saved_deffh = 0;
2194
2195 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2196 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2197 {
2198 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2199 coro->invoke_av = newAV ();
2200
2201 frame->prepare = prepare_nop;
2202 }
2203 else
2204 {
2205 av_clear (GvAV (PL_defgv));
2206 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2207
2208 coro->prio = 0;
2209
2210 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2211 api_trace (aTHX_ coro_current, 0);
2212
2213 frame->prepare = prepare_schedule;
2214 av_push (av_async_pool, SvREFCNT_inc (hv));
2215 }
2216 }
2217 else
2218 {
2219 /* first iteration, simply fall through */
2220 frame->prepare = prepare_nop;
2221 }
2222
2223 frame->check = slf_check_pool_handler;
2224 frame->data = (void *)coro;
2225}
2226
2227/*****************************************************************************/
2228/* rouse callback */
2229
2230#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2231
2232static void
2233coro_rouse_callback (pTHX_ CV *cv)
2234{
2235 dXSARGS;
2236 SV *data = (SV *)S_GENSUB_ARG;
2237
2238 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2239 {
2240 /* first call, set args */
2241 SV *coro = SvRV (data);
2242 AV *av = newAV ();
2243
2244 SvRV_set (data, (SV *)av);
2245
2246 /* better take a full copy of the arguments */
2247 while (items--)
2248 av_store (av, items, newSVsv (ST (items)));
2249
2250 api_ready (aTHX_ coro);
2251 SvREFCNT_dec (coro);
2252 }
2253
2254 XSRETURN_EMPTY;
2255}
2256
2257static int
2258slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2259{
2260 SV *data = (SV *)frame->data;
2261
2262 if (CORO_THROW)
2263 return 0;
2264
2265 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2266 return 1;
2267
2268 /* now push all results on the stack */
2269 {
2270 dSP;
2271 AV *av = (AV *)SvRV (data);
2272 int i;
2273
2274 EXTEND (SP, AvFILLp (av) + 1);
2275 for (i = 0; i <= AvFILLp (av); ++i)
2276 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2277
2278 /* we have stolen the elements, so set length to zero and free */
2279 AvFILLp (av) = -1;
2280 av_undef (av);
2281
2282 PUTBACK;
2283 }
2284
2285 return 0;
2286}
2287
2288static void
2289slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2290{
2291 SV *cb;
2292
2293 if (items)
2294 cb = arg [0];
2295 else
2296 {
2297 struct coro *coro = SvSTATE_current;
2298
2299 if (!coro->rouse_cb)
2300 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2301
2302 cb = sv_2mortal (coro->rouse_cb);
2303 coro->rouse_cb = 0;
2304 }
2305
2306 if (!SvROK (cb)
2307 || SvTYPE (SvRV (cb)) != SVt_PVCV
2308 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2309 croak ("Coro::rouse_wait called with illegal callback argument,");
2310
2311 {
2312 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2313 SV *data = (SV *)S_GENSUB_ARG;
2314
2315 frame->data = (void *)data;
2316 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2317 frame->check = slf_check_rouse_wait;
2318 }
2319}
2320
2321static SV *
2322coro_new_rouse_cb (pTHX)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv (hv);
2326 SV *data = newRV_inc ((SV *)hv);
2327 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2328
2329 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2330 SvREFCNT_dec (data); /* magicext increases the refcount */
2331
2332 SvREFCNT_dec (coro->rouse_cb);
2333 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2334
2335 return cb;
2336}
2337
2338/*****************************************************************************/
2339/* schedule-like-function opcode (SLF) */
2340
2341static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2342static const CV *slf_cv;
2343static SV **slf_argv;
2344static int slf_argc, slf_arga; /* count, allocated */
2345static I32 slf_ax; /* top of stack, for restore */
2346
2347/* this restores the stack in the case we patched the entersub, to */
2348/* recreate the stack frame as perl will on following calls */
2349/* since entersub cleared the stack */
2350static OP *
2351pp_restore (pTHX)
2352{
2353 int i;
2354 SV **SP = PL_stack_base + slf_ax;
2355
2356 PUSHMARK (SP);
2357
2358 EXTEND (SP, slf_argc + 1);
2359
2360 for (i = 0; i < slf_argc; ++i)
2361 PUSHs (sv_2mortal (slf_argv [i]));
2362
2363 PUSHs ((SV *)CvGV (slf_cv));
2364
2365 RETURNOP (slf_restore.op_first);
2366}
2367
2368static void
2369slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2370{
2371 SV **arg = (SV **)slf_frame.data;
2372
2373 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2374}
2375
2376static void
2377slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items != 2)
2380 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2381
2382 frame->prepare = slf_prepare_transfer;
2383 frame->check = slf_check_nop;
2384 frame->data = (void *)arg; /* let's hope it will stay valid */
2385}
2386
2387static void
2388slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2389{
2390 frame->prepare = prepare_schedule;
2391 frame->check = slf_check_nop;
2392}
2393
2394static void
2395slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2396{
2397 struct coro *next = (struct coro *)slf_frame.data;
2398
2399 SvREFCNT_inc_NN (next->hv);
2400 prepare_schedule_to (aTHX_ ta, next);
2401}
2402
2403static void
2404slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 if (!items)
2407 croak ("Coro::schedule_to expects a coroutine argument, caught");
2408
2409 frame->data = (void *)SvSTATE (arg [0]);
2410 frame->prepare = slf_prepare_schedule_to;
2411 frame->check = slf_check_nop;
2412}
2413
2414static void
2415slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2416{
2417 api_ready (aTHX_ SvRV (coro_current));
2418
2419 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2420}
2421
2422static void
2423slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 frame->prepare = prepare_cede;
2426 frame->check = slf_check_nop;
2427}
2428
2429static void
2430slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2431{
2432 frame->prepare = prepare_cede_notself;
2433 frame->check = slf_check_nop;
2434}
2435
2436/*
2437 * these not obviously related functions are all rolled into one
2438 * function to increase chances that they all will call transfer with the same
2439 * stack offset
2440 * SLF stands for "schedule-like-function".
2441 */
2442static OP *
2443pp_slf (pTHX)
2444{
2445 I32 checkmark; /* mark SP to see how many elements check has pushed */
2446
2447 /* set up the slf frame, unless it has already been set-up */
2448 /* the latter happens when a new coro has been started */
2449 /* or when a new cctx was attached to an existing coroutine */
2450 if (expect_true (!slf_frame.prepare))
2451 {
2452 /* first iteration */
2453 dSP;
2454 SV **arg = PL_stack_base + TOPMARK + 1;
2455 int items = SP - arg; /* args without function object */
2456 SV *gv = *sp;
2457
2458 /* do a quick consistency check on the "function" object, and if it isn't */
2459 /* for us, divert to the real entersub */
2460 if (SvTYPE (gv) != SVt_PVGV
2461 || !GvCV (gv)
2462 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2463 return PL_ppaddr[OP_ENTERSUB](aTHX);
2464
2465 if (!(PL_op->op_flags & OPf_STACKED))
2466 {
2467 /* ampersand-form of call, use @_ instead of stack */
2468 AV *av = GvAV (PL_defgv);
2469 arg = AvARRAY (av);
2470 items = AvFILLp (av) + 1;
2471 }
2472
2473 /* now call the init function, which needs to set up slf_frame */
2474 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2475 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2476
2477 /* pop args */
2478 SP = PL_stack_base + POPMARK;
2479
2480 PUTBACK;
2481 }
2482
2483 /* now that we have a slf_frame, interpret it! */
2484 /* we use a callback system not to make the code needlessly */
2485 /* complicated, but so we can run multiple perl coros from one cctx */
2486
2487 do
2488 {
2489 struct coro_transfer_args ta;
2490
2491 slf_frame.prepare (aTHX_ &ta);
2492 TRANSFER (ta, 0);
2493
2494 checkmark = PL_stack_sp - PL_stack_base;
2495 }
2496 while (slf_frame.check (aTHX_ &slf_frame));
2497
2498 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2499
2500 /* exception handling */
2501 if (expect_false (CORO_THROW))
2502 {
2503 SV *exception = sv_2mortal (CORO_THROW);
2504
2505 CORO_THROW = 0;
2506 sv_setsv (ERRSV, exception);
2507 croak (0);
2508 }
2509
2510 /* return value handling - mostly like entersub */
2511 /* make sure we put something on the stack in scalar context */
2512 if (GIMME_V == G_SCALAR)
2513 {
2514 dSP;
2515 SV **bot = PL_stack_base + checkmark;
2516
2517 if (sp == bot) /* too few, push undef */
2518 bot [1] = &PL_sv_undef;
2519 else if (sp != bot + 1) /* too many, take last one */
2520 bot [1] = *sp;
2521
2522 SP = bot + 1;
2523
2524 PUTBACK;
2525 }
2526
2527 return NORMAL;
2528}
2529
2530static void
2531api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2532{
2533 int i;
2534 SV **arg = PL_stack_base + ax;
2535 int items = PL_stack_sp - arg + 1;
2536
2537 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2538
2539 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2540 && PL_op->op_ppaddr != pp_slf)
2541 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2542
2543 CvFLAGS (cv) |= CVf_SLF;
2544 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2545 slf_cv = cv;
2546
2547 /* we patch the op, and then re-run the whole call */
2548 /* we have to put the same argument on the stack for this to work */
2549 /* and this will be done by pp_restore */
2550 slf_restore.op_next = (OP *)&slf_restore;
2551 slf_restore.op_type = OP_CUSTOM;
2552 slf_restore.op_ppaddr = pp_restore;
2553 slf_restore.op_first = PL_op;
2554
2555 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2556
2557 if (PL_op->op_flags & OPf_STACKED)
2558 {
2559 if (items > slf_arga)
2560 {
2561 slf_arga = items;
2562 Safefree (slf_argv);
2563 New (0, slf_argv, slf_arga, SV *);
2564 }
2565
2566 slf_argc = items;
2567
2568 for (i = 0; i < items; ++i)
2569 slf_argv [i] = SvREFCNT_inc (arg [i]);
2570 }
2571 else
2572 slf_argc = 0;
2573
2574 PL_op->op_ppaddr = pp_slf;
2575 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2576
2577 PL_op = (OP *)&slf_restore;
2578}
2579
2580/*****************************************************************************/
2581/* dynamic wind */
2582
2583static void
2584on_enterleave_call (pTHX_ SV *cb)
2585{
2586 dSP;
2587
2588 PUSHSTACK;
2589
2590 PUSHMARK (SP);
2591 PUTBACK;
2592 call_sv (cb, G_VOID | G_DISCARD);
2593 SPAGAIN;
2594
2595 POPSTACK;
2596}
2597
2598static SV *
2599coro_avp_pop_and_free (pTHX_ AV **avp)
2600{
2601 AV *av = *avp;
2602 SV *res = av_pop (av);
2603
2604 if (AvFILLp (av) < 0)
2605 {
2606 *avp = 0;
2607 SvREFCNT_dec (av);
2608 }
2609
2610 return res;
2611}
2612
2613static void
2614coro_pop_on_enter (pTHX_ void *coro)
2615{
2616 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2617 SvREFCNT_dec (cb);
2618}
2619
2620static void
2621coro_pop_on_leave (pTHX_ void *coro)
2622{
2623 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2624 on_enterleave_call (aTHX_ sv_2mortal (cb));
2625}
2626
2627/*****************************************************************************/
2628/* PerlIO::cede */
2629
2630typedef struct
2631{
2632 PerlIOBuf base;
2633 NV next, every;
2634} PerlIOCede;
2635
2636static IV
2637PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2638{
2639 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2640
2641 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2642 self->next = nvtime () + self->every;
2643
2644 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2645}
2646
2647static SV *
2648PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2649{
2650 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2651
2652 return newSVnv (self->every);
2653}
2654
2655static IV
2656PerlIOCede_flush (pTHX_ PerlIO *f)
2657{
2658 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2659 double now = nvtime ();
2660
2661 if (now >= self->next)
2662 {
2663 api_cede (aTHX);
2664 self->next = now + self->every;
2665 }
2666
2667 return PerlIOBuf_flush (aTHX_ f);
2668}
2669
2670static PerlIO_funcs PerlIO_cede =
2671{
2672 sizeof(PerlIO_funcs),
2673 "cede",
2674 sizeof(PerlIOCede),
2675 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2676 PerlIOCede_pushed,
2677 PerlIOBuf_popped,
2678 PerlIOBuf_open,
2679 PerlIOBase_binmode,
2680 PerlIOCede_getarg,
2681 PerlIOBase_fileno,
2682 PerlIOBuf_dup,
2683 PerlIOBuf_read,
2684 PerlIOBuf_unread,
2685 PerlIOBuf_write,
2686 PerlIOBuf_seek,
2687 PerlIOBuf_tell,
2688 PerlIOBuf_close,
2689 PerlIOCede_flush,
2690 PerlIOBuf_fill,
2691 PerlIOBase_eof,
2692 PerlIOBase_error,
2693 PerlIOBase_clearerr,
2694 PerlIOBase_setlinebuf,
2695 PerlIOBuf_get_base,
2696 PerlIOBuf_bufsiz,
2697 PerlIOBuf_get_ptr,
2698 PerlIOBuf_get_cnt,
2699 PerlIOBuf_set_ptrcnt,
2700};
2701
2702/*****************************************************************************/
2703/* Coro::Semaphore & Coro::Signal */
2704
2705static SV *
2706coro_waitarray_new (pTHX_ int count)
2707{
2708 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 SV **ary;
2711
2712 /* unfortunately, building manually saves memory */
2713 Newx (ary, 2, SV *);
2714 AvALLOC (av) = ary;
2715#if PERL_VERSION_ATLEAST (5,10,0)
2716 AvARRAY (av) = ary;
2717#else
2718 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2719 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2720 SvPVX ((SV *)av) = (char *)ary;
2721#endif
2722 AvMAX (av) = 1;
2723 AvFILLp (av) = 0;
2724 ary [0] = newSViv (count);
2725
2726 return newRV_noinc ((SV *)av);
2727}
2728
2729/* semaphore */
2730
2731static void
2732coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2733{
2734 SV *count_sv = AvARRAY (av)[0];
2735 IV count = SvIVX (count_sv);
2736
2737 count += adjust;
2738 SvIVX (count_sv) = count;
2739
2740 /* now wake up as many waiters as are expected to lock */
2741 while (count > 0 && AvFILLp (av) > 0)
2742 {
2743 SV *cb;
2744
2745 /* swap first two elements so we can shift a waiter */
2746 AvARRAY (av)[0] = AvARRAY (av)[1];
2747 AvARRAY (av)[1] = count_sv;
2748 cb = av_shift (av);
2749
2750 if (SvOBJECT (cb))
2751 {
2752 api_ready (aTHX_ cb);
2753 --count;
2754 }
2755 else if (SvTYPE (cb) == SVt_PVCV)
2756 {
2757 dSP;
2758 PUSHMARK (SP);
2759 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2760 PUTBACK;
2761 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2762 }
2763
2764 SvREFCNT_dec (cb);
2765 }
2766}
2767
2768static void
2769coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2770{
2771 /* call $sem->adjust (0) to possibly wake up some other waiters */
2772 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2773}
2774
2775static int
2776slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2777{
2778 AV *av = (AV *)frame->data;
2779 SV *count_sv = AvARRAY (av)[0];
2780
2781 /* if we are about to throw, don't actually acquire the lock, just throw */
2782 if (CORO_THROW)
2783 return 0;
2784 else if (SvIVX (count_sv) > 0)
2785 {
2786 SvSTATE_current->on_destroy = 0;
2787
2788 if (acquire)
2789 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2790 else
2791 coro_semaphore_adjust (aTHX_ av, 0);
2792
2793 return 0;
2794 }
2795 else
2796 {
2797 int i;
2798 /* if we were woken up but can't down, we look through the whole */
2799 /* waiters list and only add us if we aren't in there already */
2800 /* this avoids some degenerate memory usage cases */
2801
2802 for (i = 1; i <= AvFILLp (av); ++i)
2803 if (AvARRAY (av)[i] == SvRV (coro_current))
2804 return 1;
2805
2806 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2807 return 1;
2808 }
2809}
2810
2811static int
2812slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2813{
2814 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2815}
2816
2817static int
2818slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2819{
2820 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2821}
2822
2823static void
2824slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2825{
2826 AV *av = (AV *)SvRV (arg [0]);
2827
2828 if (SvIVX (AvARRAY (av)[0]) > 0)
2829 {
2830 frame->data = (void *)av;
2831 frame->prepare = prepare_nop;
2832 }
2833 else
2834 {
2835 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2836
2837 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2838 frame->prepare = prepare_schedule;
2839
2840 /* to avoid race conditions when a woken-up coro gets terminated */
2841 /* we arrange for a temporary on_destroy that calls adjust (0) */
2842 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2843 }
2844}
2845
2846static void
2847slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2848{
2849 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2850 frame->check = slf_check_semaphore_down;
2851}
2852
2853static void
2854slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2855{
2856 if (items >= 2)
2857 {
2858 /* callback form */
2859 AV *av = (AV *)SvRV (arg [0]);
2860 SV *cb_cv = s_get_cv_croak (arg [1]);
2861
2862 av_push (av, SvREFCNT_inc_NN (cb_cv));
2863
2864 if (SvIVX (AvARRAY (av)[0]) > 0)
2865 coro_semaphore_adjust (aTHX_ av, 0);
2866
2867 frame->prepare = prepare_nop;
2868 frame->check = slf_check_nop;
2869 }
2870 else
2871 {
2872 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2873 frame->check = slf_check_semaphore_wait;
2874 }
2875}
2876
2877/* signal */
2878
2879static void
2880coro_signal_wake (pTHX_ AV *av, int count)
2881{
2882 SvIVX (AvARRAY (av)[0]) = 0;
2883
2884 /* now signal count waiters */
2885 while (count > 0 && AvFILLp (av) > 0)
2886 {
2887 SV *cb;
2888
2889 /* swap first two elements so we can shift a waiter */
2890 cb = AvARRAY (av)[0];
2891 AvARRAY (av)[0] = AvARRAY (av)[1];
2892 AvARRAY (av)[1] = cb;
2893
2894 cb = av_shift (av);
2895
2896 if (SvTYPE (cb) == SVt_PVCV)
2897 {
2898 dSP;
2899 PUSHMARK (SP);
2900 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2901 PUTBACK;
2902 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2903 }
2904 else
2905 {
2906 api_ready (aTHX_ cb);
2907 sv_setiv (cb, 0); /* signal waiter */
2908 }
2909
2910 SvREFCNT_dec (cb);
2911
2912 --count;
2913 }
2914}
2915
2916static int
2917slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2918{
2919 /* if we are about to throw, also stop waiting */
2920 return SvROK ((SV *)frame->data) && !CORO_THROW;
2921}
2922
2923static void
2924slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2925{
2926 AV *av = (AV *)SvRV (arg [0]);
2927
2928 if (items >= 2)
2929 {
2930 SV *cb_cv = s_get_cv_croak (arg [1]);
2931 av_push (av, SvREFCNT_inc_NN (cb_cv));
2932
2933 if (SvIVX (AvARRAY (av)[0]))
2934 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2935
2936 frame->prepare = prepare_nop;
2937 frame->check = slf_check_nop;
2938 }
2939 else if (SvIVX (AvARRAY (av)[0]))
2940 {
2941 SvIVX (AvARRAY (av)[0]) = 0;
2942 frame->prepare = prepare_nop;
2943 frame->check = slf_check_nop;
2944 }
2945 else
2946 {
2947 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2948
2949 av_push (av, waiter);
2950
2951 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2952 frame->prepare = prepare_schedule;
2953 frame->check = slf_check_signal_wait;
2954 }
2955}
2956
2957/*****************************************************************************/
2958/* Coro::AIO */
2959
2960#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2961
2962/* helper storage struct */
2963struct io_state
2964{
2965 int errorno;
2966 I32 laststype; /* U16 in 5.10.0 */
2967 int laststatval;
2968 Stat_t statcache;
2969};
2970
2971static void
2972coro_aio_callback (pTHX_ CV *cv)
2973{
2974 dXSARGS;
2975 AV *state = (AV *)S_GENSUB_ARG;
2976 SV *coro = av_pop (state);
2977 SV *data_sv = newSV (sizeof (struct io_state));
2978
2979 av_extend (state, items - 1);
2980
2981 sv_upgrade (data_sv, SVt_PV);
2982 SvCUR_set (data_sv, sizeof (struct io_state));
2983 SvPOK_only (data_sv);
2984
2985 {
2986 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2987
2988 data->errorno = errno;
2989 data->laststype = PL_laststype;
2990 data->laststatval = PL_laststatval;
2991 data->statcache = PL_statcache;
2992 }
2993
2994 /* now build the result vector out of all the parameters and the data_sv */
2995 {
2996 int i;
2997
2998 for (i = 0; i < items; ++i)
2999 av_push (state, SvREFCNT_inc_NN (ST (i)));
3000 }
3001
3002 av_push (state, data_sv);
3003
3004 api_ready (aTHX_ coro);
3005 SvREFCNT_dec (coro);
3006 SvREFCNT_dec ((AV *)state);
3007}
3008
3009static int
3010slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3011{
3012 AV *state = (AV *)frame->data;
3013
3014 /* if we are about to throw, return early */
3015 /* this does not cancel the aio request, but at least */
3016 /* it quickly returns */
3017 if (CORO_THROW)
3018 return 0;
3019
3020 /* one element that is an RV? repeat! */
3021 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3022 return 1;
3023
3024 /* restore status */
3025 {
3026 SV *data_sv = av_pop (state);
3027 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3028
3029 errno = data->errorno;
3030 PL_laststype = data->laststype;
3031 PL_laststatval = data->laststatval;
3032 PL_statcache = data->statcache;
3033
3034 SvREFCNT_dec (data_sv);
3035 }
3036
3037 /* push result values */
3038 {
3039 dSP;
3040 int i;
3041
3042 EXTEND (SP, AvFILLp (state) + 1);
3043 for (i = 0; i <= AvFILLp (state); ++i)
3044 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3045
3046 PUTBACK;
3047 }
3048
3049 return 0;
3050}
3051
3052static void
3053slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3054{
3055 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3056 SV *coro_hv = SvRV (coro_current);
3057 struct coro *coro = SvSTATE_hv (coro_hv);
3058
3059 /* put our coroutine id on the state arg */
3060 av_push (state, SvREFCNT_inc_NN (coro_hv));
3061
3062 /* first see whether we have a non-zero priority and set it as AIO prio */
3063 if (coro->prio)
3064 {
3065 dSP;
3066
3067 static SV *prio_cv;
3068 static SV *prio_sv;
3069
3070 if (expect_false (!prio_cv))
3071 {
3072 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3073 prio_sv = newSViv (0);
3074 }
3075
3076 PUSHMARK (SP);
3077 sv_setiv (prio_sv, coro->prio);
3078 XPUSHs (prio_sv);
3079
3080 PUTBACK;
3081 call_sv (prio_cv, G_VOID | G_DISCARD);
3082 }
3083
3084 /* now call the original request */
3085 {
3086 dSP;
3087 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3088 int i;
3089
3090 PUSHMARK (SP);
3091
3092 /* first push all args to the stack */
3093 EXTEND (SP, items + 1);
3094
3095 for (i = 0; i < items; ++i)
3096 PUSHs (arg [i]);
3097
3098 /* now push the callback closure */
3099 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3100
3101 /* now call the AIO function - we assume our request is uncancelable */
3102 PUTBACK;
3103 call_sv ((SV *)req, G_VOID | G_DISCARD);
3104 }
3105
3106 /* now that the request is going, we loop till we have a result */
3107 frame->data = (void *)state;
3108 frame->prepare = prepare_schedule;
3109 frame->check = slf_check_aio_req;
3110}
3111
3112static void
3113coro_aio_req_xs (pTHX_ CV *cv)
3114{
3115 dXSARGS;
3116
3117 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3118
3119 XSRETURN_EMPTY;
3120}
3121
3122/*****************************************************************************/
3123
3124#if CORO_CLONE
3125# include "clone.c"
3126#endif
3127
3128/*****************************************************************************/
3129
3130static SV *
3131coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3132{
3133 SV *coro_sv;
3134 struct coro *coro;
3135 MAGIC *mg;
3136 HV *hv;
3137 SV *cb;
3138 int i;
3139
3140 if (argc > 0)
3141 {
3142 cb = s_get_cv_croak (argv [0]);
3143
3144 if (!is_coro)
3145 {
3146 if (CvISXSUB (cb))
3147 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3148
3149 if (!CvROOT (cb))
3150 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3151 }
3152 }
3153
3154 Newz (0, coro, 1, struct coro);
3155 coro->args = newAV ();
3156 coro->flags = CF_NEW;
3157
3158 if (coro_first) coro_first->prev = coro;
3159 coro->next = coro_first;
3160 coro_first = coro;
3161
3162 coro->hv = hv = newHV ();
3163 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3164 mg->mg_flags |= MGf_DUP;
3165 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3166
3167 if (argc > 0)
3168 {
3169 av_extend (coro->args, argc + is_coro - 1);
3170
3171 if (is_coro)
3172 {
3173 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3174 cb = (SV *)cv_coro_run;
3175 }
3176
3177 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3178
3179 for (i = 1; i < argc; i++)
3180 av_push (coro->args, newSVsv (argv [i]));
3181 }
3182
3183 return coro_sv;
3184}
3185
508MODULE = Coro::State PACKAGE = Coro::State 3186MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
509 3187
510PROTOTYPES: ENABLE 3188PROTOTYPES: DISABLE
511 3189
512BOOT: 3190BOOT:
3191{
3192#ifdef USE_ITHREADS
3193# if CORO_PTHREAD
3194 coro_thx = PERL_GET_CONTEXT;
3195# endif
3196#endif
3197 BOOT_PAGESIZE;
3198
3199 cctx_current = cctx_new_empty ();
3200
3201 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3202 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3203
3204 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3205 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3206 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3207
3208 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3209 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3210 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3211
513 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 3212 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
514 3213
515 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 3214 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
516 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 3215 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
517 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 3216 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3217 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
518 3218
519 if (!padlist_cache) 3219 main_mainstack = PL_mainstack;
520 padlist_cache = newHV (); 3220 main_top_env = PL_top_env;
521 3221
522Coro::State 3222 while (main_top_env->je_prev)
523_newprocess(args) 3223 main_top_env = main_top_env->je_prev;
524 SV * args 3224
3225 {
3226 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3227
3228 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3229 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3230
3231 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3232 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3233 }
3234
3235 coroapi.ver = CORO_API_VERSION;
3236 coroapi.rev = CORO_API_REVISION;
3237
3238 coroapi.transfer = api_transfer;
3239
3240 coroapi.sv_state = SvSTATE_;
3241 coroapi.execute_slf = api_execute_slf;
3242 coroapi.prepare_nop = prepare_nop;
3243 coroapi.prepare_schedule = prepare_schedule;
3244 coroapi.prepare_cede = prepare_cede;
3245 coroapi.prepare_cede_notself = prepare_cede_notself;
3246
3247 time_init (aTHX);
3248
3249 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3250}
3251
3252SV *
3253new (SV *klass, ...)
3254 ALIAS:
3255 Coro::new = 1
3256 CODE:
3257 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3258 OUTPUT:
3259 RETVAL
3260
3261void
3262transfer (...)
3263 PROTOTYPE: $$
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3266
3267void
3268_exit (int code)
525 PROTOTYPE: $ 3269 PROTOTYPE: $
3270 CODE:
3271 _exit (code);
3272
3273SV *
3274clone (Coro::State coro)
3275 CODE:
3276{
3277#if CORO_CLONE
3278 struct coro *ncoro = coro_clone (aTHX_ coro);
3279 MAGIC *mg;
3280 /* TODO: too much duplication */
3281 ncoro->hv = newHV ();
3282 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3283 mg->mg_flags |= MGf_DUP;
3284 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3285#else
3286 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3287#endif
3288}
3289 OUTPUT:
3290 RETVAL
3291
3292int
3293cctx_stacksize (int new_stacksize = 0)
3294 PROTOTYPE: ;$
3295 CODE:
3296 RETVAL = cctx_stacksize;
3297 if (new_stacksize)
3298 {
3299 cctx_stacksize = new_stacksize;
3300 ++cctx_gen;
3301 }
3302 OUTPUT:
3303 RETVAL
3304
3305int
3306cctx_max_idle (int max_idle = 0)
3307 PROTOTYPE: ;$
3308 CODE:
3309 RETVAL = cctx_max_idle;
3310 if (max_idle > 1)
3311 cctx_max_idle = max_idle;
3312 OUTPUT:
3313 RETVAL
3314
3315int
3316cctx_count ()
3317 PROTOTYPE:
3318 CODE:
3319 RETVAL = cctx_count;
3320 OUTPUT:
3321 RETVAL
3322
3323int
3324cctx_idle ()
3325 PROTOTYPE:
3326 CODE:
3327 RETVAL = cctx_idle;
3328 OUTPUT:
3329 RETVAL
3330
3331void
3332list ()
3333 PROTOTYPE:
3334 PPCODE:
3335{
3336 struct coro *coro;
3337 for (coro = coro_first; coro; coro = coro->next)
3338 if (coro->hv)
3339 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3340}
3341
3342void
3343call (Coro::State coro, SV *coderef)
3344 ALIAS:
3345 eval = 1
3346 CODE:
3347{
3348 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3349 {
3350 struct coro *current = SvSTATE_current;
3351 struct CoroSLF slf_save;
3352
3353 if (current != coro)
3354 {
3355 PUTBACK;
3356 save_perl (aTHX_ current);
3357 load_perl (aTHX_ coro);
3358 /* the coro is most likely in an active SLF call.
3359 * while not strictly required (the code we execute is
3360 * not allowed to call any SLF functions), it's cleaner
3361 * to reinitialise the slf_frame and restore it later.
3362 * This might one day allow us to actually do SLF calls
3363 * from code executed here.
3364 */
3365 slf_save = slf_frame;
3366 slf_frame.prepare = 0;
3367 SPAGAIN;
3368 }
3369
3370 PUSHSTACK;
3371
3372 PUSHMARK (SP);
3373 PUTBACK;
3374
3375 if (ix)
3376 eval_sv (coderef, 0);
3377 else
3378 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3379
3380 POPSTACK;
3381 SPAGAIN;
3382
3383 if (current != coro)
3384 {
3385 PUTBACK;
3386 slf_frame = slf_save;
3387 save_perl (aTHX_ coro);
3388 load_perl (aTHX_ current);
3389 SPAGAIN;
3390 }
3391 }
3392}
3393
3394SV *
3395is_ready (Coro::State coro)
3396 PROTOTYPE: $
3397 ALIAS:
3398 is_ready = CF_READY
3399 is_running = CF_RUNNING
3400 is_new = CF_NEW
3401 is_destroyed = CF_DESTROYED
3402 is_suspended = CF_SUSPENDED
3403 CODE:
3404 RETVAL = boolSV (coro->flags & ix);
3405 OUTPUT:
3406 RETVAL
3407
3408void
3409throw (Coro::State self, SV *exception = &PL_sv_undef)
3410 PROTOTYPE: $;$
526 CODE: 3411 CODE:
527 Coro__State coro; 3412{
3413 struct coro *current = SvSTATE_current;
3414 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3415 SvREFCNT_dec (*exceptionp);
3416 SvGETMAGIC (exception);
3417 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3418}
528 3419
529 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3420void
530 croak ("Coro::State::_newprocess expects an arrayref"); 3421api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3422 PROTOTYPE: $;$
3423 C_ARGS: aTHX_ coro, flags
3424
3425SV *
3426has_cctx (Coro::State coro)
3427 PROTOTYPE: $
3428 CODE:
3429 /* maybe manage the running flag differently */
3430 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3431 OUTPUT:
3432 RETVAL
3433
3434int
3435is_traced (Coro::State coro)
3436 PROTOTYPE: $
3437 CODE:
3438 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3439 OUTPUT:
3440 RETVAL
3441
3442UV
3443rss (Coro::State coro)
3444 PROTOTYPE: $
3445 ALIAS:
3446 usecount = 1
3447 CODE:
3448 switch (ix)
3449 {
3450 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3451 case 1: RETVAL = coro->usecount; break;
531 3452 }
532 New (0, coro, 1, struct coro); 3453 OUTPUT:
533
534 coro->mainstack = 0; /* actual work is done inside transfer */
535 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
536
537 RETVAL = coro; 3454 RETVAL
3455
3456void
3457force_cctx ()
3458 PROTOTYPE:
3459 CODE:
3460 cctx_current->idle_sp = 0;
3461
3462void
3463swap_defsv (Coro::State self)
3464 PROTOTYPE: $
3465 ALIAS:
3466 swap_defav = 1
3467 CODE:
3468 if (!self->slot)
3469 croak ("cannot swap state with coroutine that has no saved state,");
3470 else
3471 {
3472 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3473 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3474
3475 SV *tmp = *src; *src = *dst; *dst = tmp;
3476 }
3477
3478void
3479cancel (Coro::State self)
3480 CODE:
3481 coro_state_destroy (aTHX_ self);
3482
3483SV *
3484enable_times (int enabled = enable_times)
3485 CODE:
3486{
3487 RETVAL = boolSV (enable_times);
3488
3489 if (enabled != enable_times)
3490 {
3491 enable_times = enabled;
3492
3493 coro_times_update ();
3494 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3495 }
3496}
538 OUTPUT: 3497 OUTPUT:
539 RETVAL 3498 RETVAL
540 3499
541void 3500void
542transfer(prev, next, flags = SAVE_DEFAV) 3501times (Coro::State self)
543 Coro::State_or_hashref prev 3502 PPCODE:
544 Coro::State_or_hashref next 3503{
545 int flags 3504 struct coro *current = SvSTATE (coro_current);
546 PROTOTYPE: @ 3505
3506 if (expect_false (current == self))
3507 {
3508 coro_times_update ();
3509 coro_times_add (SvSTATE (coro_current));
3510 }
3511
3512 EXTEND (SP, 2);
3513 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3514 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3515
3516 if (expect_false (current == self))
3517 coro_times_sub (SvSTATE (coro_current));
3518}
3519
3520void
3521swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3522 CODE:
3523{
3524 struct coro *current = SvSTATE_current;
3525
3526 if (current == coro)
3527 SWAP_SVS (current);
3528
3529 if (!coro->swap_sv)
3530 coro->swap_sv = newAV ();
3531
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3534
3535 if (current == coro)
3536 SWAP_SVS (current);
3537}
3538
3539
3540MODULE = Coro::State PACKAGE = Coro
3541
3542BOOT:
3543{
3544 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3545 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3546 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3547 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3548 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3549 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3550 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3551 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3552 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3553
3554 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3555 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3556 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3557 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3558
3559 coro_stash = gv_stashpv ("Coro", TRUE);
3560
3561 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3562 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3563 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3564 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3565 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3566 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3567
3568 {
3569 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3570
3571 coroapi.schedule = api_schedule;
3572 coroapi.schedule_to = api_schedule_to;
3573 coroapi.cede = api_cede;
3574 coroapi.cede_notself = api_cede_notself;
3575 coroapi.ready = api_ready;
3576 coroapi.is_ready = api_is_ready;
3577 coroapi.nready = coro_nready;
3578 coroapi.current = coro_current;
3579
3580 /*GCoroAPI = &coroapi;*/
3581 sv_setiv (sv, (IV)&coroapi);
3582 SvREADONLY_on (sv);
3583 }
3584}
3585
3586SV *
3587async (...)
3588 PROTOTYPE: &@
547 CODE: 3589 CODE:
548 3590 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
549 transfer (aTHX_ prev, next, flags); 3591 api_ready (aTHX_ RETVAL);
3592 OUTPUT:
3593 RETVAL
550 3594
551void 3595void
552DESTROY(coro) 3596_destroy (Coro::State coro)
553 Coro::State coro 3597 CODE:
3598 /* used by the manager thread */
3599 coro_state_destroy (aTHX_ coro);
3600 coro_call_on_destroy (aTHX_ coro);
3601
3602void
3603terminate (...)
3604 CODE:
3605 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3606
3607void
3608cancel (...)
3609 CODE:
3610 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3611
3612void
3613schedule (...)
3614 CODE:
3615 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3616
3617void
3618schedule_to (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3621
3622void
3623cede_to (...)
3624 CODE:
3625 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3626
3627void
3628cede (...)
3629 CODE:
3630 CORO_EXECUTE_SLF_XS (slf_init_cede);
3631
3632void
3633cede_notself (...)
3634 CODE:
3635 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3636
3637void
3638_set_current (SV *current)
3639 PROTOTYPE: $
3640 CODE:
3641 SvREFCNT_dec (SvRV (coro_current));
3642 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3643
3644void
3645_set_readyhook (SV *hook)
3646 PROTOTYPE: $
554 CODE: 3647 CODE:
555 3648 SvREFCNT_dec (coro_readyhook);
556 if (coro->mainstack) 3649 SvGETMAGIC (hook);
3650 if (SvOK (hook))
3651 {
3652 coro_readyhook = newSVsv (hook);
3653 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3654 }
3655 else
557 { 3656 {
558 struct coro temp; 3657 coro_readyhook = 0;
559 3658 CORO_READYHOOK = 0;
560 SAVE(aTHX_ (&temp), SAVE_ALL);
561 LOAD(aTHX_ coro);
562
563 destroy_stacks ();
564
565 LOAD((&temp)); /* this will get rid of defsv etc.. */
566 } 3659 }
567 3660
568 Safefree (coro); 3661int
3662prio (Coro::State coro, int newprio = 0)
3663 PROTOTYPE: $;$
3664 ALIAS:
3665 nice = 1
3666 CODE:
3667{
3668 RETVAL = coro->prio;
3669
3670 if (items > 1)
3671 {
3672 if (ix)
3673 newprio = coro->prio - newprio;
3674
3675 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3676 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3677
3678 coro->prio = newprio;
3679 }
3680}
3681 OUTPUT:
3682 RETVAL
3683
3684SV *
3685ready (SV *self)
3686 PROTOTYPE: $
3687 CODE:
3688 RETVAL = boolSV (api_ready (aTHX_ self));
3689 OUTPUT:
3690 RETVAL
3691
3692int
3693nready (...)
3694 PROTOTYPE:
3695 CODE:
3696 RETVAL = coro_nready;
3697 OUTPUT:
3698 RETVAL
569 3699
570void 3700void
571flush() 3701suspend (Coro::State self)
3702 PROTOTYPE: $
572 CODE: 3703 CODE:
573#ifdef MAY_FLUSH 3704 self->flags |= CF_SUSPENDED;
574 flush_padlist_cache ();
575#endif
576
577MODULE = Coro::State PACKAGE = Coro::Cont
578
579# this is dirty and should be in it's own .xs
580 3705
581void 3706void
582result(...) 3707resume (Coro::State self)
3708 PROTOTYPE: $
3709 CODE:
3710 self->flags &= ~CF_SUSPENDED;
3711
3712void
3713_pool_handler (...)
3714 CODE:
3715 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3716
3717void
3718async_pool (SV *cv, ...)
583 PROTOTYPE: @ 3719 PROTOTYPE: &@
3720 PPCODE:
3721{
3722 HV *hv = (HV *)av_pop (av_async_pool);
3723 AV *av = newAV ();
3724 SV *cb = ST (0);
3725 int i;
3726
3727 av_extend (av, items - 2);
3728 for (i = 1; i < items; ++i)
3729 av_push (av, SvREFCNT_inc_NN (ST (i)));
3730
3731 if ((SV *)hv == &PL_sv_undef)
3732 {
3733 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3734 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3735 SvREFCNT_dec (sv);
3736 }
3737
3738 {
3739 struct coro *coro = SvSTATE_hv (hv);
3740
3741 assert (!coro->invoke_cb);
3742 assert (!coro->invoke_av);
3743 coro->invoke_cb = SvREFCNT_inc (cb);
3744 coro->invoke_av = av;
3745 }
3746
3747 api_ready (aTHX_ (SV *)hv);
3748
3749 if (GIMME_V != G_VOID)
3750 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3751 else
3752 SvREFCNT_dec (hv);
3753}
3754
3755SV *
3756rouse_cb ()
3757 PROTOTYPE:
3758 CODE:
3759 RETVAL = coro_new_rouse_cb (aTHX);
3760 OUTPUT:
3761 RETVAL
3762
3763void
3764rouse_wait (...)
3765 PROTOTYPE: ;$
3766 PPCODE:
3767 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3768
3769void
3770on_enter (SV *block)
3771 ALIAS:
3772 on_leave = 1
3773 PROTOTYPE: &
3774 CODE:
3775{
3776 struct coro *coro = SvSTATE_current;
3777 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3778
3779 block = s_get_cv_croak (block);
3780
3781 if (!*avp)
3782 *avp = newAV ();
3783
3784 av_push (*avp, SvREFCNT_inc (block));
3785
3786 if (!ix)
3787 on_enterleave_call (aTHX_ block);
3788
3789 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3790 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3791 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3792}
3793
3794
3795MODULE = Coro::State PACKAGE = PerlIO::cede
3796
3797BOOT:
3798 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3799
3800
3801MODULE = Coro::State PACKAGE = Coro::Semaphore
3802
3803SV *
3804new (SV *klass, SV *count = 0)
3805 CODE:
3806{
3807 int semcnt = 1;
3808
3809 if (count)
3810 {
3811 SvGETMAGIC (count);
3812
3813 if (SvOK (count))
3814 semcnt = SvIV (count);
3815 }
3816
3817 RETVAL = sv_bless (
3818 coro_waitarray_new (aTHX_ semcnt),
3819 GvSTASH (CvGV (cv))
3820 );
3821}
3822 OUTPUT:
3823 RETVAL
3824
3825# helper for Coro::Channel and others
3826SV *
3827_alloc (int count)
3828 CODE:
3829 RETVAL = coro_waitarray_new (aTHX_ count);
3830 OUTPUT:
3831 RETVAL
3832
3833SV *
3834count (SV *self)
3835 CODE:
3836 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3837 OUTPUT:
3838 RETVAL
3839
3840void
3841up (SV *self, int adjust = 1)
3842 ALIAS:
3843 adjust = 1
584 CODE: 3844 CODE:
585 static SV *returnstk; 3845 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
586 SV *sv;
587 AV *defav = GvAV (PL_defgv);
588 struct coro *prev, *next;
589 3846
590 if (!returnstk) 3847void
591 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3848down (...)
3849 CODE:
3850 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
592 3851
593 /* set up @_ */ 3852void
594 av_clear (defav); 3853wait (...)
595 av_fill (defav, items - 1); 3854 CODE:
596 while (items--) 3855 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
597 av_store (defav, items, SvREFCNT_inc (ST(items)));
598 3856
599 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 3857void
600 sv = av_pop ((AV *)SvRV (returnstk)); 3858try (SV *self)
601 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 3859 PPCODE:
602 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 3860{
603 SvREFCNT_dec (sv); 3861 AV *av = (AV *)SvRV (self);
604 transfer(prev, next, 0); 3862 SV *count_sv = AvARRAY (av)[0];
3863 IV count = SvIVX (count_sv);
605 3864
3865 if (count > 0)
3866 {
3867 --count;
3868 SvIVX (count_sv) = count;
3869 XSRETURN_YES;
3870 }
3871 else
3872 XSRETURN_NO;
3873}
3874
3875void
3876waiters (SV *self)
3877 PPCODE:
3878{
3879 AV *av = (AV *)SvRV (self);
3880 int wcount = AvFILLp (av) + 1 - 1;
3881
3882 if (GIMME_V == G_SCALAR)
3883 XPUSHs (sv_2mortal (newSViv (wcount)));
3884 else
3885 {
3886 int i;
3887 EXTEND (SP, wcount);
3888 for (i = 1; i <= wcount; ++i)
3889 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3890 }
3891}
3892
3893MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3894
3895void
3896_may_delete (SV *sem, int count, int extra_refs)
3897 PPCODE:
3898{
3899 AV *av = (AV *)SvRV (sem);
3900
3901 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3902 && AvFILLp (av) == 0 /* no waiters, just count */
3903 && SvIV (AvARRAY (av)[0]) == count)
3904 XSRETURN_YES;
3905
3906 XSRETURN_NO;
3907}
3908
3909MODULE = Coro::State PACKAGE = Coro::Signal
3910
3911SV *
3912new (SV *klass)
3913 CODE:
3914 RETVAL = sv_bless (
3915 coro_waitarray_new (aTHX_ 0),
3916 GvSTASH (CvGV (cv))
3917 );
3918 OUTPUT:
3919 RETVAL
3920
3921void
3922wait (...)
3923 CODE:
3924 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3925
3926void
3927broadcast (SV *self)
3928 CODE:
3929{
3930 AV *av = (AV *)SvRV (self);
3931 coro_signal_wake (aTHX_ av, AvFILLp (av));
3932}
3933
3934void
3935send (SV *self)
3936 CODE:
3937{
3938 AV *av = (AV *)SvRV (self);
3939
3940 if (AvFILLp (av))
3941 coro_signal_wake (aTHX_ av, 1);
3942 else
3943 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3944}
3945
3946IV
3947awaited (SV *self)
3948 CODE:
3949 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3950 OUTPUT:
3951 RETVAL
3952
3953
3954MODULE = Coro::State PACKAGE = Coro::AnyEvent
3955
3956BOOT:
3957 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3958
3959void
3960_schedule (...)
3961 CODE:
3962{
3963 static int incede;
3964
3965 api_cede_notself (aTHX);
3966
3967 ++incede;
3968 while (coro_nready >= incede && api_cede (aTHX))
3969 ;
3970
3971 sv_setsv (sv_activity, &PL_sv_undef);
3972 if (coro_nready >= incede)
3973 {
3974 PUSHMARK (SP);
3975 PUTBACK;
3976 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3977 }
3978
3979 --incede;
3980}
3981
3982
3983MODULE = Coro::State PACKAGE = Coro::AIO
3984
3985void
3986_register (char *target, char *proto, SV *req)
3987 CODE:
3988{
3989 SV *req_cv = s_get_cv_croak (req);
3990 /* newXSproto doesn't return the CV on 5.8 */
3991 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3992 sv_setpv ((SV *)slf_cv, proto);
3993 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3994}
3995
3996MODULE = Coro::State PACKAGE = Coro::Select
3997
3998void
3999patch_pp_sselect ()
4000 CODE:
4001 if (!coro_old_pp_sselect)
4002 {
4003 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4004 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4005 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4006 }
4007
4008void
4009unpatch_pp_sselect ()
4010 CODE:
4011 if (coro_old_pp_sselect)
4012 {
4013 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4014 coro_old_pp_sselect = 0;
4015 }
4016

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