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Comparing Coro/Coro/State.xs (file contents):
Revision 1.12 by root, Sun Jul 22 03:24:10 2001 UTC vs.
Revision 1.404 by root, Fri Jun 10 12:27:02 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#include "ecb.h"
18
19#include <stddef.h>
20#include <stdio.h>
21#include <errno.h>
22#include <assert.h>
23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
7#else 34#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 35# include <inttypes.h> /* most portable stdint.h */
9#endif 36#endif
10 37
11#define MAY_FLUSH /* increases codesize */ 38#ifdef HAVE_MMAP
39# include <unistd.h>
40# include <sys/mman.h>
41# ifndef MAP_ANONYMOUS
42# ifdef MAP_ANON
43# define MAP_ANONYMOUS MAP_ANON
44# else
45# undef HAVE_MMAP
46# endif
47# endif
48# include <limits.h>
49# ifndef PAGESIZE
50# define PAGESIZE pagesize
51# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
52static long pagesize;
53# else
54# define BOOT_PAGESIZE (void)0
55# endif
56#else
57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
59#endif
12 60
13#define SUB_INIT "Coro::State::initialize" 61#if CORO_USE_VALGRIND
62# include <valgrind/valgrind.h>
63#endif
14 64
15#define TRANSFER_SAVE_DEFAV 0x00000001 65/* the maximum number of idle cctx that will be pooled */
16#define TRANSFER_SAVE_DEFSV 0x00000002 66static int cctx_max_idle = 4;
17#define TRANSFER_SAVE_ERRSV 0x00000004
18 67
19#define TRANSFER_SAVE_ALL -1 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
69# undef CORO_STACKGUARD
70#endif
20 71
21struct coro { 72#ifndef CORO_STACKGUARD
22 /* optionally saved, might be zero */ 73# define CORO_STACKGUARD 0
74#endif
75
76/* prefer perl internal functions over our own? */
77#ifndef CORO_PREFER_PERL_FUNCTIONS
78# define CORO_PREFER_PERL_FUNCTIONS 0
79#endif
80
81/* The next macros try to return the current stack pointer, in an as
82 * portable way as possible. */
83#if __GNUC__ >= 4
84# define dSTACKLEVEL int stacklevel_dummy
85# define STACKLEVEL __builtin_frame_address (0)
86#else
87# define dSTACKLEVEL volatile void *stacklevel
88# define STACKLEVEL ((void *)&stacklevel)
89#endif
90
91#define IN_DESTRUCT PL_dirty
92
93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
95
96#ifdef USE_ITHREADS
97# if CORO_PTHREAD
98static void *coro_thx;
99# endif
100#endif
101
102#ifdef __linux
103# include <time.h> /* for timespec */
104# include <syscall.h> /* for SYS_* */
105# ifdef SYS_clock_gettime
106# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
107# define CORO_CLOCK_MONOTONIC 1
108# define CORO_CLOCK_THREAD_CPUTIME_ID 3
109# endif
110#endif
111
112static double (*nvtime)(); /* so why doesn't it take void? */
113static void (*u2time)(pTHX_ UV ret[2]);
114
115/* we hijack an hopefully unused CV flag for our purposes */
116#define CVf_SLF 0x4000
117static OP *pp_slf (pTHX);
118static void slf_destroy (pTHX_ struct coro *coro);
119
120static U32 cctx_gen;
121static size_t cctx_stacksize = CORO_STACKSIZE;
122static struct CoroAPI coroapi;
123static AV *main_mainstack; /* used to differentiate between $main and others */
124static JMPENV *main_top_env;
125static HV *coro_state_stash, *coro_stash;
126static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
127
128static AV *av_destroy; /* destruction queue */
129static SV *sv_manager; /* the manager coro */
130static SV *sv_idle; /* $Coro::idle */
131
132static GV *irsgv; /* $/ */
133static GV *stdoutgv; /* *STDOUT */
134static SV *rv_diehook;
135static SV *rv_warnhook;
136static HV *hv_sig; /* %SIG */
137
138/* async_pool helper stuff */
139static SV *sv_pool_rss;
140static SV *sv_pool_size;
141static SV *sv_async_pool_idle; /* description string */
142static AV *av_async_pool; /* idle pool */
143static SV *sv_Coro; /* class string */
144static CV *cv_pool_handler;
145
146/* Coro::AnyEvent */
147static SV *sv_activity;
148
149/* enable processtime/realtime profiling */
150static char enable_times;
151typedef U32 coro_ts[2];
152static coro_ts time_real, time_cpu;
153static char times_valid;
154
155static struct coro_cctx *cctx_first;
156static int cctx_count, cctx_idle;
157
158enum
159{
160 CC_MAPPED = 0x01,
161 CC_NOREUSE = 0x02, /* throw this away after tracing */
162 CC_TRACE = 0x04,
163 CC_TRACE_SUB = 0x08, /* trace sub calls */
164 CC_TRACE_LINE = 0x10, /* trace each statement */
165 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
166};
167
168/* this is a structure representing a c-level coroutine */
169typedef struct coro_cctx
170{
171 struct coro_cctx *next;
172
173 /* the stack */
174 void *sptr;
175 size_t ssize;
176
177 /* cpu state */
178 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
179 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
180 JMPENV *top_env;
181 coro_context cctx;
182
183 U32 gen;
184#if CORO_USE_VALGRIND
185 int valgrind_id;
186#endif
187 unsigned char flags;
188} coro_cctx;
189
190static coro_cctx *cctx_current; /* the currently running cctx */
191
192/*****************************************************************************/
193
194static MGVTBL coro_state_vtbl;
195
196enum
197{
198 CF_RUNNING = 0x0001, /* coroutine is running */
199 CF_READY = 0x0002, /* coroutine is ready */
200 CF_NEW = 0x0004, /* has never been switched to */
201 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
202 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
203 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
204};
205
206/* the structure where most of the perl state is stored, overlaid on the cxstack */
207typedef struct
208{
209 SV *defsv;
23 AV *defav; 210 AV *defav;
24 SV *defsv;
25 SV *errsv; 211 SV *errsv;
26 212 SV *irsgv;
27 /* saved global state not related to stacks */ 213 HV *hinthv;
28 U8 dowarn; 214#define VAR(name,type) type name;
215# include "state.h"
216#undef VAR
217} perl_slots;
29 218
30 /* the stacks and related info (callchain etc..) */ 219// how many context stack entries do we need for perl_slots
31 PERL_SI *curstackinfo; 220#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
32 AV *curstack; 221
222/* this is a structure representing a perl-level coroutine */
223struct coro
224{
225 /* the C coroutine allocated to this perl coroutine, if any */
226 coro_cctx *cctx;
227
228 /* ready queue */
229 struct coro *next_ready;
230
231 /* state data */
232 struct CoroSLF slf_frame; /* saved slf frame */
33 AV *mainstack; 233 AV *mainstack;
34 SV **stack_sp; 234 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;
56 235
236 CV *startcv; /* the CV to execute */
57 /* data associated with this coroutine (initial args) */ 237 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 238 int flags; /* CF_ flags */
239 HV *hv; /* the perl hash associated with this coro, if any */
240
241 /* statistics */
242 int usecount; /* number of transfers to this coro */
243
244 /* coro process data */
245 int prio;
246 SV *except; /* exception to be thrown */
247 SV *rouse_cb; /* last rouse callback */
248 AV *on_destroy; /* callbacks or coros to notify on destroy */
249 AV *status; /* the exit status list */
250
251 /* async_pool */
252 SV *saved_deffh;
253 SV *invoke_cb;
254 AV *invoke_av;
255
256 /* on_enter/on_leave */
257 AV *on_enter;
258 AV *on_leave;
259
260 /* swap_sv */
261 AV *swap_sv;
262
263 /* times */
264 coro_ts t_cpu, t_real;
265
266 /* linked list */
267 struct coro *next, *prev;
59}; 268};
60 269
61typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
63 272
64static AV *main_mainstack; /* used to differentiate between $main and others */ 273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the main reason we don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
65 277
66static HV *padlist_cache; 278/** Coro ********************************************************************/
67 279
68/* mostly copied from op.c:cv_clone2 */ 280#define CORO_PRIO_MAX 3
69STATIC AV * 281#define CORO_PRIO_HIGH 1
70clone_padlist (AV *protopadlist) 282#define CORO_PRIO_NORMAL 0
283#define CORO_PRIO_LOW -1
284#define CORO_PRIO_IDLE -3
285#define CORO_PRIO_MIN -4
286
287/* for Coro.pm */
288static SV *coro_current;
289static SV *coro_readyhook;
290static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
291static CV *cv_coro_run;
292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** Coro::Select ************************************************************/
296
297static OP *(*coro_old_pp_sselect) (pTHX);
298static SV *coro_select_select;
299
300/* horrible hack, but if it works... */
301static OP *
302coro_pp_sselect (pTHX)
71{ 303{
72 AV *av; 304 dSP;
73 I32 ix; 305 PUSHMARK (SP - 4); /* fake argument list */
74 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 306 XPUSHs (coro_select_select);
75 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 307 PUTBACK;
76 SV **pname = AvARRAY (protopad_name); 308
77 SV **ppad = AvARRAY (protopad); 309 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
78 I32 fname = AvFILLp (protopad_name); 310 PL_op->op_flags |= OPf_STACKED;
79 I32 fpad = AvFILLp (protopad); 311 PL_op->op_private = 0;
312 return PL_ppaddr [OP_ENTERSUB](aTHX);
313}
314
315/** time stuff **************************************************************/
316
317#ifdef HAS_GETTIMEOFDAY
318
319ECB_INLINE void
320coro_u2time (pTHX_ UV ret[2])
321{
322 struct timeval tv;
323 gettimeofday (&tv, 0);
324
325 ret [0] = tv.tv_sec;
326 ret [1] = tv.tv_usec;
327}
328
329ECB_INLINE double
330coro_nvtime ()
331{
332 struct timeval tv;
333 gettimeofday (&tv, 0);
334
335 return tv.tv_sec + tv.tv_usec * 1e-6;
336}
337
338ECB_INLINE void
339time_init (pTHX)
340{
341 nvtime = coro_nvtime;
342 u2time = coro_u2time;
343}
344
345#else
346
347ECB_INLINE void
348time_init (pTHX)
349{
350 SV **svp;
351
352 require_pv ("Time/HiRes.pm");
353
354 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
355
356 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
357 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
358
359 nvtime = INT2PTR (double (*)(), SvIV (*svp));
360
361 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
362 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
363}
364
365#endif
366
367/** lowlevel stuff **********************************************************/
368
369static SV * ecb_noinline
370coro_get_sv (pTHX_ const char *name, int create)
371{
372#if PERL_VERSION_ATLEAST (5,10,0)
373 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
374 get_sv (name, create);
375#endif
376 return get_sv (name, create);
377}
378
379static AV * ecb_noinline
380coro_get_av (pTHX_ const char *name, int create)
381{
382#if PERL_VERSION_ATLEAST (5,10,0)
383 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
384 get_av (name, create);
385#endif
386 return get_av (name, create);
387}
388
389static HV * ecb_noinline
390coro_get_hv (pTHX_ const char *name, int create)
391{
392#if PERL_VERSION_ATLEAST (5,10,0)
393 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
394 get_hv (name, create);
395#endif
396 return get_hv (name, create);
397}
398
399ECB_INLINE void
400coro_times_update ()
401{
402#ifdef coro_clock_gettime
403 struct timespec ts;
404
405 ts.tv_sec = ts.tv_nsec = 0;
406 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
407 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
408
409 ts.tv_sec = ts.tv_nsec = 0;
410 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
411 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
412#else
413 dTHX;
414 UV tv[2];
415
416 u2time (aTHX_ tv);
417 time_real [0] = tv [0];
418 time_real [1] = tv [1] * 1000;
419#endif
420}
421
422ECB_INLINE void
423coro_times_add (struct coro *c)
424{
425 c->t_real [1] += time_real [1];
426 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
427 c->t_real [0] += time_real [0];
428
429 c->t_cpu [1] += time_cpu [1];
430 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
431 c->t_cpu [0] += time_cpu [0];
432}
433
434ECB_INLINE void
435coro_times_sub (struct coro *c)
436{
437 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
438 c->t_real [1] -= time_real [1];
439 c->t_real [0] -= time_real [0];
440
441 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
442 c->t_cpu [1] -= time_cpu [1];
443 c->t_cpu [0] -= time_cpu [0];
444}
445
446/*****************************************************************************/
447/* magic glue */
448
449#define CORO_MAGIC_type_cv 26
450#define CORO_MAGIC_type_state PERL_MAGIC_ext
451
452#define CORO_MAGIC_NN(sv, type) \
453 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
454 ? SvMAGIC (sv) \
455 : mg_find (sv, type))
456
457#define CORO_MAGIC(sv, type) \
458 (ecb_expect_true (SvMAGIC (sv)) \
459 ? CORO_MAGIC_NN (sv, type) \
460 : 0)
461
462#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
463#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
464
465ECB_INLINE MAGIC *
466SvSTATEhv_p (pTHX_ SV *coro)
467{
468 MAGIC *mg;
469
470 if (ecb_expect_true (
471 SvTYPE (coro) == SVt_PVHV
472 && (mg = CORO_MAGIC_state (coro))
473 && mg->mg_virtual == &coro_state_vtbl
474 ))
475 return mg;
476
477 return 0;
478}
479
480ECB_INLINE struct coro *
481SvSTATE_ (pTHX_ SV *coro)
482{
483 MAGIC *mg;
484
485 if (SvROK (coro))
486 coro = SvRV (coro);
487
488 mg = SvSTATEhv_p (aTHX_ coro);
489 if (!mg)
490 croak ("Coro::State object required");
491
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
504ECB_INLINE AV *
505coro_derive_padlist (pTHX_ CV *cv)
506{
507 AV *padlist = CvPADLIST (cv);
80 AV *newpadlist, *newpad_name, *newpad; 508 AV *newpadlist, *newpad;
81 SV **npad;
82
83 newpad_name = newAV ();
84 for (ix = fname; ix >= 0; ix--)
85 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
86
87 newpad = newAV ();
88 av_fill (newpad, AvFILLp (protopad));
89 npad = AvARRAY (newpad);
90 509
91 newpadlist = newAV (); 510 newpadlist = newAV ();
92 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
93 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]));
94 av_store (newpadlist, 1, (SV *) newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
95 522
96 av = newAV (); /* will be @_ */ 523 return newpadlist;
97 av_extend (av, 0); 524}
98 av_store (newpad, 0, (SV *) av);
99 AvFLAGS (av) = AVf_REIFY;
100 525
101 for (ix = fpad; ix > 0; ix--) 526ECB_INLINE void
527free_padlist (pTHX_ AV *padlist)
528{
529 /* may be during global destruction */
530 if (!IN_DESTRUCT)
102 { 531 {
103 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 532 I32 i = AvFILLp (padlist);
104 if (namesv && namesv != &PL_sv_undef) 533
534 while (i > 0) /* special-case index 0 */
105 { 535 {
106 char *name = SvPVX (namesv); /* XXX */ 536 /* we try to be extra-careful here */
107 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 537 AV *av = (AV *)AvARRAY (padlist)[i--];
108 { /* lexical from outside? */ 538 I32 j = AvFILLp (av);
109 npad[ix] = SvREFCNT_inc (ppad[ix]); 539
110 } 540 while (j >= 0)
111 else 541 SvREFCNT_dec (AvARRAY (av)[j--]);
112 { /* our own lexical */ 542
113 SV *sv; 543 AvFILLp (av) = -1;
114 if (*name == '&') 544 SvREFCNT_dec (av);
115 sv = SvREFCNT_inc (ppad[ix]);
116 else if (*name == '@')
117 sv = (SV *) newAV ();
118 else if (*name == '%')
119 sv = (SV *) newHV ();
120 else
121 sv = NEWSV (0, 0);
122 if (!SvPADBUSY (sv))
123 SvPADMY_on (sv);
124 npad[ix] = sv;
125 }
126 } 545 }
127 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 546
128 { 547 SvREFCNT_dec (AvARRAY (padlist)[0]);
129 npad[ix] = SvREFCNT_inc (ppad[ix]); 548
130 } 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 */
579ECB_INLINE void
580get_padlist (pTHX_ CV *cv)
581{
582 MAGIC *mg = CORO_MAGIC_cv (cv);
583 AV *av;
584
585 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
131 else 587 else
132 { 588 {
133 SV *sv = NEWSV (0, 0); 589#if CORO_PREFER_PERL_FUNCTIONS
134 SvPADTMP_on (sv); 590 /* this is probably cleaner? but also slower! */
135 npad[ix] = sv; 591 /* in practise, it seems to be less stable */
136 } 592 CV *cp = Perl_cv_clone (aTHX_ cv);
137 } 593 CvPADLIST (cv) = CvPADLIST (cp);
138 594 CvPADLIST (cp) = 0;
139#if 0 /* return -ENOTUNDERSTOOD */ 595 SvREFCNT_dec (cp);
140 /* Now that vars are all in place, clone nested closures. */ 596#else
141 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
142 for (ix = fpad; ix > 0; ix--) {
143 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
144 if (namesv
145 && namesv != &PL_sv_undef
146 && !(SvFLAGS(namesv) & SVf_FAKE)
147 && *SvPVX(namesv) == '&'
148 && CvCLONE(ppad[ix]))
149 {
150 CV *kid = cv_clone((CV*)ppad[ix]);
151 SvREFCNT_dec(ppad[ix]);
152 CvCLONE_on(kid);
153 SvPADMY_on(kid);
154 npad[ix] = (SV*)kid;
155 }
156 }
157#endif 598#endif
158 599 }
159 return newpadlist;
160} 600}
161 601
162#ifdef MAY_FLUSH 602ECB_INLINE void
163STATIC AV * 603put_padlist (pTHX_ CV *cv)
164free_padlist (AV *padlist)
165{ 604{
166 /* may be during global destruction */ 605 MAGIC *mg = CORO_MAGIC_cv (cv);
167 if (SvREFCNT(padlist)) 606 AV *av;
607
608 if (ecb_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 (ecb_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); )
168 { 628 {
169 I32 i = AvFILLp(padlist); 629 SV *a = AvARRAY (c->swap_sv)[i++];
170 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 */
171 { 648 {
172 SV **svp = av_fetch(padlist, i--, FALSE); 649 /* swap sv_u */
173 SV *sv = svp ? *svp : Nullsv; 650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
174 if (sv) 651
175 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);
176 } 663 }
177
178 SvREFCNT_dec((SV*)padlist);
179 }
180}
181#endif 664#endif
182
183/* the next two functions merely cache the padlists */
184STATIC void
185get_padlist (CV *cv)
186{
187 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
188
189 if (he && AvFILLp ((AV *)*he) >= 0)
190 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
191 else
192 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
193}
194
195STATIC void
196put_padlist (CV *cv)
197{
198 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
199
200 if (SvTYPE (*he) != SVt_PVAV)
201 { 665 }
202 SvREFCNT_dec (*he);
203 *he = (SV *)newAV ();
204 }
205
206 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
207} 666}
208 667
209#ifdef MAY_FLUSH 668#define SWAP_SVS(coro) \
210STATIC void 669 if (ecb_expect_false ((coro)->swap_sv)) \
211flush_padlist_cache () 670 swap_svs (aTHX_ (coro))
212{
213 HV *hv = padlist_cache;
214 padlist_cache = newHV ();
215 671
216 if (hv_iterinit (hv))
217 {
218 HE *he;
219 AV *padlist;
220
221 while (!!(he = hv_iternext (hv)))
222 {
223 AV *av = (AV *)HeVAL(he);
224
225 /* casting is fun. */
226 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
227 free_padlist (padlist);
228 }
229 }
230
231 SvREFCNT_dec (hv);
232}
233#endif
234
235#define SB do {
236#define SE } while (0)
237
238#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
239#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
240
241#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
242
243static void 672static void
673on_enterleave_call (pTHX_ SV *cb);
674
675static void
244load_state(pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
245{ 677{
246 PL_dowarn = c->dowarn; 678 perl_slots *slot = c->slot;
679 c->slot = 0;
247 680
248 PL_curstackinfo = c->curstackinfo;
249 PL_curstack = c->curstack;
250 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
251 PL_stack_sp = c->stack_sp;
252 PL_op = c->op;
253 PL_curpad = c->curpad;
254 PL_stack_base = c->stack_base;
255 PL_stack_max = c->stack_max;
256 PL_tmps_stack = c->tmps_stack;
257 PL_tmps_floor = c->tmps_floor;
258 PL_tmps_ix = c->tmps_ix;
259 PL_tmps_max = c->tmps_max;
260 PL_markstack = c->markstack;
261 PL_markstack_ptr = c->markstack_ptr;
262 PL_markstack_max = c->markstack_max;
263 PL_scopestack = c->scopestack;
264 PL_scopestack_ix = c->scopestack_ix;
265 PL_scopestack_max = c->scopestack_max;
266 PL_savestack = c->savestack;
267 PL_savestack_ix = c->savestack_ix;
268 PL_savestack_max = c->savestack_max;
269 PL_retstack = c->retstack;
270 PL_retstack_ix = c->retstack_ix;
271 PL_retstack_max = c->retstack_max;
272 PL_curcop = c->curcop;
273 682
274 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 683 GvSV (PL_defgv) = slot->defsv;
275 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 684 GvAV (PL_defgv) = slot->defav;
276 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
277 692
278 { 693 {
279 dSP; 694 dSP;
695
280 CV *cv; 696 CV *cv;
281 697
282 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
283 while ((cv = (CV *)POPs)) 699 while (ecb_expect_true (cv = (CV *)POPs))
284 { 700 {
285 AV *padlist = (AV *)POPs;
286
287 if (padlist)
288 {
289 put_padlist (cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
290 CvPADLIST(cv) = padlist; 702 CvDEPTH (cv) = PTR2IV (POPs);
291#ifdef USE_THREADS 703 CvPADLIST (cv) = (AV *)POPs;
292 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
293#endif
294 }
295
296 ++CvDEPTH(cv);
297 } 704 }
298 705
299 PUTBACK; 706 PUTBACK;
300 } 707 }
301}
302 708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (ecb_expect_false (enable_times))
713 {
714 if (ecb_expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (ecb_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
303static void 731static void
304save_state(pTHX_ Coro__State c, int flags) 732save_perl (pTHX_ Coro__State c)
305{ 733{
734 SWAP_SVS (c);
735
736 if (ecb_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 (ecb_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
306 { 755 {
307 dSP; 756 dSP;
308 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
309 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
310 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
312 /* 761 /*
313 * 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
314 * (and reinitialize) all cv's in the whole callchain :( 763 * (and reinitialize) all cv's in the whole callchain :(
315 */ 764 */
316 765
317 PUSHs (Nullsv); 766 XPUSHs (Nullsv);
318 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
319 for (;;) 768 for (;;)
320 { 769 {
321 do 770 while (ecb_expect_true (cxix >= 0))
322 { 771 {
323 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
324 773
325 if (CxTYPE(cx) == CXt_SUB) 774 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
326 { 775 {
327 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
777
328 if (CvDEPTH(cv)) 778 if (ecb_expect_true (CvDEPTH (cv)))
329 { 779 {
330#ifdef USE_THREADS
331 /*XPUSHs ((SV *)CvOWNER(cv));*/
332 /*CvOWNER(cv) = 0;*/
333 /*error must unlock this cv etc.. etc...*/
334#endif
335 EXTEND (SP, CvDEPTH(cv)*2); 780 EXTEND (SP, 3);
336
337 while (--CvDEPTH(cv))
338 {
339 /* this tells the restore code to increment CvDEPTH */
340 PUSHs (Nullsv);
341 PUSHs ((SV *)cv);
342 }
343
344 PUSHs ((SV *)CvPADLIST(cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
345 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
346 784
347 get_padlist (cv); /* this is a monster */ 785 CvDEPTH (cv) = 0;
786 get_padlist (aTHX_ cv);
348 } 787 }
349 } 788 }
350 else if (CxTYPE(cx) == CXt_FORMAT)
351 {
352 /* I never used formats, so how should I know how these are implemented? */
353 /* my bold guess is as a simple, plain sub... */
354 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
355 }
356 } 789 }
357 while (cxix >= 0);
358 790
359 if (top_si->si_type == PERLSI_MAIN) 791 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
360 break; 792 break;
361 793
362 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
363 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
364 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
365 } 797 }
366 798
367 PUTBACK; 799 PUTBACK;
368 } 800 }
369 801
370 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 802 /* allocate some space on the context stack for our purposes */
371 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 803 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
372 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 804 {
805 unsigned int i;
373 806
374 /* I have not the slightest idea of why av_reify is necessary */ 807 for (i = 0; i < SLOT_COUNT; ++i)
375 /* but if it's missing the defav contents magically get replaced sometimes */ 808 CXINC;
376 if (c->defav)
377 av_reify (c->defav);
378 809
379 c->dowarn = PL_dowarn; 810 cxstack_ix -= SLOT_COUNT; /* undo allocation */
811 }
380 812
381 c->curstackinfo = PL_curstackinfo;
382 c->curstack = PL_curstack;
383 c->mainstack = PL_mainstack; 813 c->mainstack = PL_mainstack;
384 c->stack_sp = PL_stack_sp; 814
385 c->op = PL_op; 815 {
386 c->curpad = PL_curpad; 816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
817
818 slot->defav = GvAV (PL_defgv);
819 slot->defsv = DEFSV;
820 slot->errsv = ERRSV;
821 slot->irsgv = GvSV (irsgv);
822 slot->hinthv = GvHV (PL_hintgv);
823
824 #define VAR(name,type) slot->name = PL_ ## name;
825 # include "state.h"
826 #undef VAR
827 }
828}
829
830/*
831 * allocate various perl stacks. This is almost an exact copy
832 * of perl.c:init_stacks, except that it uses less memory
833 * on the (sometimes correct) assumption that coroutines do
834 * not usually need a lot of stackspace.
835 */
836#if CORO_PREFER_PERL_FUNCTIONS
837# define coro_init_stacks(thx) init_stacks ()
838#else
839static void
840coro_init_stacks (pTHX)
841{
842 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
843 PL_curstackinfo->si_type = PERLSI_MAIN;
844 PL_curstack = PL_curstackinfo->si_stack;
845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
846
847 PL_stack_base = AvARRAY(PL_curstack);
387 c->stack_base = PL_stack_base; 848 PL_stack_sp = PL_stack_base;
388 c->stack_max = PL_stack_max; 849 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
389 c->tmps_stack = PL_tmps_stack; 850
390 c->tmps_floor = PL_tmps_floor; 851 New(50,PL_tmps_stack,32,SV*);
391 c->tmps_ix = PL_tmps_ix; 852 PL_tmps_floor = -1;
392 c->tmps_max = PL_tmps_max; 853 PL_tmps_ix = -1;
854 PL_tmps_max = 32;
855
856 New(54,PL_markstack,16,I32);
393 c->markstack = PL_markstack; 857 PL_markstack_ptr = PL_markstack;
394 c->markstack_ptr = PL_markstack_ptr; 858 PL_markstack_max = PL_markstack + 16;
395 c->markstack_max = PL_markstack_max; 859
396 c->scopestack = PL_scopestack; 860#ifdef SET_MARK_OFFSET
397 c->scopestack_ix = PL_scopestack_ix; 861 SET_MARK_OFFSET;
398 c->scopestack_max = PL_scopestack_max; 862#endif
399 c->savestack = PL_savestack; 863
400 c->savestack_ix = PL_savestack_ix; 864 New(54,PL_scopestack,8,I32);
401 c->savestack_max = PL_savestack_max; 865 PL_scopestack_ix = 0;
402 c->retstack = PL_retstack; 866 PL_scopestack_max = 8;
403 c->retstack_ix = PL_retstack_ix; 867
404 c->retstack_max = PL_retstack_max; 868 New(54,PL_savestack,24,ANY);
405 c->curcop = PL_curcop; 869 PL_savestack_ix = 0;
870 PL_savestack_max = 24;
871
872#if !PERL_VERSION_ATLEAST (5,10,0)
873 New(54,PL_retstack,4,OP*);
874 PL_retstack_ix = 0;
875 PL_retstack_max = 4;
876#endif
406} 877}
878#endif
407 879
408/* 880/*
409 * destroy the stacks, the callchain etc... 881 * destroy the stacks, the callchain etc...
410 * still there is a memleak of 128 bytes...
411 */ 882 */
412STATIC void 883static void
413destroy_stacks(pTHX) 884coro_destruct_stacks (pTHX)
414{ 885{
415 /* is this ugly, I ask? */
416 while (PL_scopestack_ix)
417 LEAVE;
418
419 /* sure it is, but more important: is it correct?? :/ */
420 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
421 FREETMPS;
422
423 while (PL_curstackinfo->si_next) 886 while (PL_curstackinfo->si_next)
424 PL_curstackinfo = PL_curstackinfo->si_next; 887 PL_curstackinfo = PL_curstackinfo->si_next;
425 888
426 while (PL_curstackinfo) 889 while (PL_curstackinfo)
427 { 890 {
428 PERL_SI *p = PL_curstackinfo->si_prev; 891 PERL_SI *p = PL_curstackinfo->si_prev;
429 892
430 { 893 if (!IN_DESTRUCT)
431 dSP;
432 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
433 PUTBACK; /* possibly superfluous */
434 }
435
436 dounwind(-1);
437
438 SvREFCNT_dec(PL_curstackinfo->si_stack); 894 SvREFCNT_dec (PL_curstackinfo->si_stack);
895
439 Safefree(PL_curstackinfo->si_cxstack); 896 Safefree (PL_curstackinfo->si_cxstack);
440 Safefree(PL_curstackinfo); 897 Safefree (PL_curstackinfo);
441 PL_curstackinfo = p; 898 PL_curstackinfo = p;
442 } 899 }
443 900
444 Safefree(PL_tmps_stack); 901 Safefree (PL_tmps_stack);
445 Safefree(PL_markstack); 902 Safefree (PL_markstack);
446 Safefree(PL_scopestack); 903 Safefree (PL_scopestack);
447 Safefree(PL_savestack); 904 Safefree (PL_savestack);
905#if !PERL_VERSION_ATLEAST (5,10,0)
448 Safefree(PL_retstack); 906 Safefree (PL_retstack);
907#endif
449} 908}
450 909
451STATIC void 910#define CORO_RSS \
452transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 911 rss += sizeof (SYM (curstackinfo)); \
453{ 912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
454 dSP; 913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
455 918
456 if (prev != next) 919static size_t
457 { 920coro_rss (pTHX_ struct coro *coro)
458 /* 921{
459 * this could be done in newprocess which would lead to 922 size_t rss = sizeof (*coro);
460 * extremely elegant and fast (just SAVE/LOAD) 923
461 * code here, but lazy allocation of stacks has also
462 * some virtues and the overhead of the if() is nil.
463 */
464 if (next->mainstack) 924 if (coro->mainstack)
925 {
926 if (coro->flags & CF_RUNNING)
465 { 927 {
466 SAVE (prev, flags); 928 #define SYM(sym) PL_ ## sym
467 LOAD (next); 929 CORO_RSS;
468 /* mark this state as in-use */ 930 #undef SYM
469 next->mainstack = 0;
470 next->tmps_ix = -2;
471 }
472 else if (next->tmps_ix == -2)
473 {
474 croak ("tried to transfer to running coroutine");
475 } 931 }
476 else 932 else
477 { 933 {
934 #define SYM(sym) coro->slot->sym
935 CORO_RSS;
936 #undef SYM
478 /* 937 }
938 }
939
940 return rss;
941}
942
943/** coroutine stack handling ************************************************/
944
945static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
948
949/* apparently < 5.8.8 */
950#ifndef MgPV_nolen_const
951#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
952 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
953 (const char*)(mg)->mg_ptr)
954#endif
955
956/*
957 * This overrides the default magic get method of %SIG elements.
958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
959 * and instead of trying to save and restore the hash elements (extremely slow),
960 * we just provide our own readback here.
961 */
962static int ecb_cold
963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
964{
965 const char *s = MgPV_nolen_const (mg);
966
967 if (*s == '_')
968 {
969 SV **svp = 0;
970
971 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
972 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
973
974 if (svp)
975 {
976 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
977 return 0;
978 }
979 }
980
981 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
982}
983
984static int ecb_cold
985coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
986{
987 const char *s = MgPV_nolen_const (mg);
988
989 if (*s == '_')
990 {
991 SV **svp = 0;
992
993 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
994 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
995
996 if (svp)
997 {
998 SV *old = *svp;
999 *svp = 0;
1000 SvREFCNT_dec (old);
1001 return 0;
1002 }
1003 }
1004
1005 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1006}
1007
1008static int ecb_cold
1009coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1010{
1011 const char *s = MgPV_nolen_const (mg);
1012
1013 if (*s == '_')
1014 {
1015 SV **svp = 0;
1016
1017 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1019
1020 if (svp)
1021 {
1022 SV *old = *svp;
1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1024 SvREFCNT_dec (old);
1025 return 0;
1026 }
1027 }
1028
1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1030}
1031
1032static void
1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
1034{
1035 /* kind of mega-hacky, but works */
1036 ta->next = ta->prev = (struct coro *)ta;
1037}
1038
1039static int
1040slf_check_nop (pTHX_ struct CoroSLF *frame)
1041{
1042 return 0;
1043}
1044
1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1054init_perl (pTHX_ struct coro *coro)
1055{
1056 /*
479 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
480 */ 1058 */
1059 coro_init_stacks (aTHX);
1060
1061 PL_runops = RUNOPS_DEFAULT;
1062 PL_curcop = &PL_compiling;
1063 PL_in_eval = EVAL_NULL;
1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
1068 PL_curpm = 0;
1069 PL_curpad = 0;
1070 PL_localizing = 0;
1071 PL_restartop = 0;
1072#if PERL_VERSION_ATLEAST (5,10,0)
1073 PL_parser = 0;
1074#endif
1075 PL_hints = 0;
1076
1077 /* recreate the die/warn hooks */
1078 PL_diehook = SvREFCNT_inc (rv_diehook);
1079 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1080
1081 GvSV (PL_defgv) = newSV (0);
1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
1083 GvSV (PL_errgv) = newSV (0);
1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
1086 PL_rs = newSVsv (GvSV (irsgv));
1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1088
1089 {
1090 dSP;
481 UNOP myop; 1091 UNOP myop;
482 1092
483 SAVE (prev, -1); /* first get rid of the old state */
484
485 init_stacks (); /* from perl.c */
486 SPAGAIN;
487
488 PL_op = (OP *)&myop;
489 /*PL_curcop = 0;*/
490 SvREFCNT_dec (GvAV (PL_defgv));
491 GvAV (PL_defgv) = next->args;
492
493 Zero(&myop, 1, UNOP); 1093 Zero (&myop, 1, UNOP);
494 myop.op_next = Nullop; 1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
495 myop.op_flags = OPf_WANT_VOID; 1096 myop.op_flags = OPf_WANT_VOID;
496 1097
1098 PUSHMARK (SP);
1099 PUSHs ((SV *)coro->startcv);
1100 PUTBACK;
1101 PL_op = (OP *)&myop;
1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1103 }
1104
1105 /* this newly created coroutine might be run on an existing cctx which most
1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1107 */
1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1110 slf_frame.destroy = 0;
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 (ecb_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 SV *old_current = SvRV (coro_current);
1160 struct coro *current = SvSTATE (old_current);
1161
1162 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1163
1164 save_perl (aTHX_ current);
1165
1166 /* this will cause transfer_check to croak on block*/
1167 SvRV_set (coro_current, (SV *)coro->hv);
1168
1169 load_perl (aTHX_ coro);
1170
1171 coro_unwind_stacks (aTHX);
1172
1173 /* restore swapped sv's */
1174 SWAP_SVS (coro);
1175
1176 coro_destruct_stacks (aTHX);
1177
1178 // now save some sv's to be free'd later
1179 svf [0] = GvSV (PL_defgv);
1180 svf [1] = (SV *)GvAV (PL_defgv);
1181 svf [2] = GvSV (PL_errgv);
1182 svf [3] = (SV *)PL_defoutgv;
1183 svf [4] = PL_rs;
1184 svf [5] = GvSV (irsgv);
1185 svf [6] = (SV *)GvHV (PL_hintgv);
1186 svf [7] = PL_diehook;
1187 svf [8] = PL_warnhook;
1188 assert (9 == sizeof (svf) / sizeof (*svf));
1189
1190 SvRV_set (coro_current, old_current);
1191
1192 load_perl (aTHX_ current);
1193 }
1194
1195 {
1196 unsigned int i;
1197
1198 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1199 SvREFCNT_dec (svf [i]);
1200
1201 SvREFCNT_dec (coro->saved_deffh);
1202 SvREFCNT_dec (coro->rouse_cb);
1203 SvREFCNT_dec (coro->invoke_cb);
1204 SvREFCNT_dec (coro->invoke_av);
1205 }
1206}
1207
1208ECB_INLINE void
1209free_coro_mortal (pTHX)
1210{
1211 if (ecb_expect_true (coro_mortal))
1212 {
1213 SvREFCNT_dec ((SV *)coro_mortal);
1214 coro_mortal = 0;
1215 }
1216}
1217
1218static int
1219runops_trace (pTHX)
1220{
1221 COP *oldcop = 0;
1222 int oldcxix = -2;
1223
1224 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1225 {
1226 PERL_ASYNC_CHECK ();
1227
1228 if (cctx_current->flags & CC_TRACE_ALL)
1229 {
1230 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1231 {
1232 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1233 SV **bot, **top;
1234 AV *av = newAV (); /* return values */
1235 SV **cb;
1236 dSP;
1237
1238 GV *gv = CvGV (cx->blk_sub.cv);
1239 SV *fullname = sv_2mortal (newSV (0));
1240 if (isGV (gv))
1241 gv_efullname3 (fullname, gv, 0);
1242
1243 bot = PL_stack_base + cx->blk_oldsp + 1;
1244 top = cx->blk_gimme == G_ARRAY ? SP + 1
1245 : cx->blk_gimme == G_SCALAR ? bot + 1
1246 : bot;
1247
1248 av_extend (av, top - bot);
1249 while (bot < top)
1250 av_push (av, SvREFCNT_inc_NN (*bot++));
1251
1252 PL_runops = RUNOPS_DEFAULT;
1253 ENTER;
1254 SAVETMPS;
1255 EXTEND (SP, 3);
1256 PUSHMARK (SP);
1257 PUSHs (&PL_sv_no);
1258 PUSHs (fullname);
1259 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1260 PUTBACK;
1261 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1262 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1263 SPAGAIN;
1264 FREETMPS;
1265 LEAVE;
1266 PL_runops = runops_trace;
1267 }
1268
1269 if (oldcop != PL_curcop)
1270 {
1271 oldcop = PL_curcop;
1272
1273 if (PL_curcop != &PL_compiling)
1274 {
1275 SV **cb;
1276
1277 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1278 {
1279 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1280
1281 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1282 {
1283 dSP;
1284 GV *gv = CvGV (cx->blk_sub.cv);
1285 SV *fullname = sv_2mortal (newSV (0));
1286
1287 if (isGV (gv))
1288 gv_efullname3 (fullname, gv, 0);
1289
1290 PL_runops = RUNOPS_DEFAULT;
1291 ENTER;
1292 SAVETMPS;
1293 EXTEND (SP, 3);
1294 PUSHMARK (SP);
1295 PUSHs (&PL_sv_yes);
1296 PUSHs (fullname);
1297 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1298 PUTBACK;
1299 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1300 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1301 SPAGAIN;
1302 FREETMPS;
1303 LEAVE;
1304 PL_runops = runops_trace;
1305 }
1306
1307 oldcxix = cxstack_ix;
1308 }
1309
1310 if (cctx_current->flags & CC_TRACE_LINE)
1311 {
1312 dSP;
1313
1314 PL_runops = RUNOPS_DEFAULT;
1315 ENTER;
1316 SAVETMPS;
1317 EXTEND (SP, 3);
1318 PL_runops = RUNOPS_DEFAULT;
1319 PUSHMARK (SP);
1320 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1321 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1322 PUTBACK;
1323 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1324 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1325 SPAGAIN;
1326 FREETMPS;
1327 LEAVE;
1328 PL_runops = runops_trace;
1329 }
1330 }
1331 }
1332 }
1333 }
1334
1335 TAINT_NOT;
1336 return 0;
1337}
1338
1339static struct CoroSLF cctx_ssl_frame;
1340
1341static void
1342slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1343{
1344 ta->prev = 0;
1345}
1346
1347static int
1348slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1349{
1350 *frame = cctx_ssl_frame;
1351
1352 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1353}
1354
1355/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1356static void ecb_noinline
1357cctx_prepare (pTHX)
1358{
1359 PL_top_env = &PL_start_env;
1360
1361 if (cctx_current->flags & CC_TRACE)
1362 PL_runops = runops_trace;
1363
1364 /* we already must be executing an SLF op, there is no other valid way
1365 * that can lead to creation of a new cctx */
1366 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1367 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1368
1369 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1370 cctx_ssl_frame = slf_frame;
1371
1372 slf_frame.prepare = slf_prepare_set_stacklevel;
1373 slf_frame.check = slf_check_set_stacklevel;
1374}
1375
1376/* the tail of transfer: execute stuff we can only do after a transfer */
1377ECB_INLINE void
1378transfer_tail (pTHX)
1379{
1380 free_coro_mortal (aTHX);
1381}
1382
1383/*
1384 * this is a _very_ stripped down perl interpreter ;)
1385 */
1386static void
1387cctx_run (void *arg)
1388{
1389#ifdef USE_ITHREADS
1390# if CORO_PTHREAD
1391 PERL_SET_CONTEXT (coro_thx);
1392# endif
1393#endif
1394 {
1395 dTHX;
1396
1397 /* normally we would need to skip the entersub here */
1398 /* not doing so will re-execute it, which is exactly what we want */
1399 /* PL_nop = PL_nop->op_next */
1400
1401 /* inject a fake subroutine call to cctx_init */
1402 cctx_prepare (aTHX);
1403
1404 /* cctx_run is the alternative tail of transfer() */
1405 transfer_tail (aTHX);
1406
1407 /* somebody or something will hit me for both perl_run and PL_restartop */
1408 PL_restartop = PL_op;
1409 perl_run (PL_curinterp);
1410 /*
1411 * Unfortunately, there is no way to get at the return values of the
1412 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1413 * runtime errors here, as this is just a random interpreter, not a thread.
1414 */
1415
1416 /*
1417 * If perl-run returns we assume exit() was being called or the coro
1418 * fell off the end, which seems to be the only valid (non-bug)
1419 * reason for perl_run to return. We try to exit by jumping to the
1420 * bootstrap-time "top" top_env, as we cannot restore the "main"
1421 * coroutine as Coro has no such concept.
1422 * This actually isn't valid with the pthread backend, but OSes requiring
1423 * that backend are too broken to do it in a standards-compliant way.
1424 */
1425 PL_top_env = main_top_env;
1426 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1427 }
1428}
1429
1430static coro_cctx *
1431cctx_new ()
1432{
1433 coro_cctx *cctx;
1434
1435 ++cctx_count;
1436 New (0, cctx, 1, coro_cctx);
1437
1438 cctx->gen = cctx_gen;
1439 cctx->flags = 0;
1440 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1441
1442 return cctx;
1443}
1444
1445/* create a new cctx only suitable as source */
1446static coro_cctx *
1447cctx_new_empty ()
1448{
1449 coro_cctx *cctx = cctx_new ();
1450
1451 cctx->sptr = 0;
1452 coro_create (&cctx->cctx, 0, 0, 0, 0);
1453
1454 return cctx;
1455}
1456
1457/* create a new cctx suitable as destination/running a perl interpreter */
1458static coro_cctx *
1459cctx_new_run ()
1460{
1461 coro_cctx *cctx = cctx_new ();
1462 void *stack_start;
1463 size_t stack_size;
1464
1465#if HAVE_MMAP
1466 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1467 /* mmap supposedly does allocate-on-write for us */
1468 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1469
1470 if (cctx->sptr != (void *)-1)
1471 {
1472 #if CORO_STACKGUARD
1473 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1474 #endif
1475 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1476 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1477 cctx->flags |= CC_MAPPED;
1478 }
1479 else
1480#endif
1481 {
1482 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1483 New (0, cctx->sptr, cctx_stacksize, long);
1484
1485 if (!cctx->sptr)
1486 {
1487 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1488 _exit (EXIT_FAILURE);
1489 }
1490
1491 stack_start = cctx->sptr;
1492 stack_size = cctx->ssize;
1493 }
1494
1495 #if CORO_USE_VALGRIND
1496 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1497 #endif
1498
1499 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1500
1501 return cctx;
1502}
1503
1504static void
1505cctx_destroy (coro_cctx *cctx)
1506{
1507 if (!cctx)
1508 return;
1509
1510 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1511
1512 --cctx_count;
1513 coro_destroy (&cctx->cctx);
1514
1515 /* coro_transfer creates new, empty cctx's */
1516 if (cctx->sptr)
1517 {
1518 #if CORO_USE_VALGRIND
1519 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1520 #endif
1521
1522#if HAVE_MMAP
1523 if (cctx->flags & CC_MAPPED)
1524 munmap (cctx->sptr, cctx->ssize);
1525 else
1526#endif
1527 Safefree (cctx->sptr);
1528 }
1529
1530 Safefree (cctx);
1531}
1532
1533/* wether this cctx should be destructed */
1534#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1535
1536static coro_cctx *
1537cctx_get (pTHX)
1538{
1539 while (ecb_expect_true (cctx_first))
1540 {
1541 coro_cctx *cctx = cctx_first;
1542 cctx_first = cctx->next;
1543 --cctx_idle;
1544
1545 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1546 return cctx;
1547
1548 cctx_destroy (cctx);
1549 }
1550
1551 return cctx_new_run ();
1552}
1553
1554static void
1555cctx_put (coro_cctx *cctx)
1556{
1557 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1558
1559 /* free another cctx if overlimit */
1560 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1561 {
1562 coro_cctx *first = cctx_first;
1563 cctx_first = first->next;
1564 --cctx_idle;
1565
1566 cctx_destroy (first);
1567 }
1568
1569 ++cctx_idle;
1570 cctx->next = cctx_first;
1571 cctx_first = cctx;
1572}
1573
1574/** coroutine switching *****************************************************/
1575
1576static void
1577transfer_check (pTHX_ struct coro *prev, struct coro *next)
1578{
1579 /* TODO: throwing up here is considered harmful */
1580
1581 if (ecb_expect_true (prev != next))
1582 {
1583 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1584 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1585
1586 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1587 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1588
1589#if !PERL_VERSION_ATLEAST (5,10,0)
1590 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1591 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1592#endif
1593 }
1594}
1595
1596/* always use the TRANSFER macro */
1597static void ecb_noinline /* noinline so we have a fixed stackframe */
1598transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1599{
1600 dSTACKLEVEL;
1601
1602 /* sometimes transfer is only called to set idle_sp */
1603 if (ecb_expect_false (!prev))
1604 {
1605 cctx_current->idle_sp = STACKLEVEL;
1606 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1607 }
1608 else if (ecb_expect_true (prev != next))
1609 {
1610 coro_cctx *cctx_prev;
1611
1612 if (ecb_expect_false (prev->flags & CF_NEW))
1613 {
1614 /* create a new empty/source context */
1615 prev->flags &= ~CF_NEW;
1616 prev->flags |= CF_RUNNING;
1617 }
1618
1619 prev->flags &= ~CF_RUNNING;
1620 next->flags |= CF_RUNNING;
1621
1622 /* first get rid of the old state */
1623 save_perl (aTHX_ prev);
1624
1625 if (ecb_expect_false (next->flags & CF_NEW))
1626 {
1627 /* need to start coroutine */
1628 next->flags &= ~CF_NEW;
1629 /* setup coroutine call */
1630 init_perl (aTHX_ next);
1631 }
1632 else
1633 load_perl (aTHX_ next);
1634
1635 /* possibly untie and reuse the cctx */
1636 if (ecb_expect_true (
1637 cctx_current->idle_sp == STACKLEVEL
1638 && !(cctx_current->flags & CC_TRACE)
1639 && !force_cctx
1640 ))
1641 {
1642 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1643 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1644
1645 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1646 /* without this the next cctx_get might destroy the running cctx while still in use */
1647 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1648 if (ecb_expect_true (!next->cctx))
1649 next->cctx = cctx_get (aTHX);
1650
1651 cctx_put (cctx_current);
1652 }
1653 else
1654 prev->cctx = cctx_current;
1655
1656 ++next->usecount;
1657
1658 cctx_prev = cctx_current;
1659 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1660
1661 next->cctx = 0;
1662
1663 if (ecb_expect_false (cctx_prev != cctx_current))
1664 {
1665 cctx_prev->top_env = PL_top_env;
1666 PL_top_env = cctx_current->top_env;
1667 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1668 }
1669
1670 transfer_tail (aTHX);
1671 }
1672}
1673
1674#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1675#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1676
1677/** high level stuff ********************************************************/
1678
1679/* this function is actually Coro, not Coro::State, but we call it from here */
1680/* because it is convenient - but it hasn't been declared yet for that reason */
1681static void
1682coro_call_on_destroy (pTHX_ struct coro *coro);
1683
1684static void
1685coro_state_destroy (pTHX_ struct coro *coro)
1686{
1687 if (coro->flags & CF_ZOMBIE)
1688 return;
1689
1690 slf_destroy (aTHX_ coro);
1691
1692 coro->flags |= CF_ZOMBIE;
1693
1694 if (coro->flags & CF_READY)
1695 {
1696 /* reduce nready, as destroying a ready coro effectively unreadies it */
1697 /* alternative: look through all ready queues and remove the coro */
1698 --coro_nready;
1699 }
1700 else
1701 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1702
1703 if (coro->next) coro->next->prev = coro->prev;
1704 if (coro->prev) coro->prev->next = coro->next;
1705 if (coro == coro_first) coro_first = coro->next;
1706
1707 if (coro->mainstack
1708 && coro->mainstack != main_mainstack
1709 && coro->slot
1710 && !PL_dirty)
1711 destroy_perl (aTHX_ coro);
1712
1713 cctx_destroy (coro->cctx);
1714 SvREFCNT_dec (coro->startcv);
1715 SvREFCNT_dec (coro->args);
1716 SvREFCNT_dec (coro->swap_sv);
1717 SvREFCNT_dec (CORO_THROW);
1718
1719 coro_call_on_destroy (aTHX_ coro);
1720
1721 /* more destruction mayhem in coro_state_free */
1722}
1723
1724static int
1725coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1726{
1727 struct coro *coro = (struct coro *)mg->mg_ptr;
1728 mg->mg_ptr = 0;
1729
1730 coro_state_destroy (aTHX_ coro);
1731 SvREFCNT_dec (coro->on_destroy);
1732 SvREFCNT_dec (coro->status);
1733
1734 Safefree (coro);
1735
1736 return 0;
1737}
1738
1739static int ecb_cold
1740coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1741{
1742 /* called when perl clones the current process the slow way (windows process emulation) */
1743 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1744 mg->mg_ptr = 0;
1745 mg->mg_virtual = 0;
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_state_vtbl = {
1751 0, 0, 0, 0,
1752 coro_state_free,
1753 0,
1754#ifdef MGf_DUP
1755 coro_state_dup,
1756#else
1757# define MGf_DUP 0
1758#endif
1759};
1760
1761static void
1762prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1763{
1764 ta->prev = SvSTATE (prev_sv);
1765 ta->next = SvSTATE (next_sv);
1766 TRANSFER_CHECK (*ta);
1767}
1768
1769static void
1770api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1771{
1772 struct coro_transfer_args ta;
1773
1774 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1775 TRANSFER (ta, 1);
1776}
1777
1778/** Coro ********************************************************************/
1779
1780ECB_INLINE void
1781coro_enq (pTHX_ struct coro *coro)
1782{
1783 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1784
1785 SvREFCNT_inc_NN (coro->hv);
1786
1787 coro->next_ready = 0;
1788 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1789 ready [1] = coro;
1790}
1791
1792ECB_INLINE struct coro *
1793coro_deq (pTHX)
1794{
1795 int prio;
1796
1797 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1798 {
1799 struct coro **ready = coro_ready [prio];
1800
1801 if (ready [0])
1802 {
1803 struct coro *coro = ready [0];
1804 ready [0] = coro->next_ready;
1805 return coro;
1806 }
1807 }
1808
1809 return 0;
1810}
1811
1812static void
1813invoke_sv_ready_hook_helper (void)
1814{
1815 dTHX;
1816 dSP;
1817
1818 ENTER;
1819 SAVETMPS;
1820
1821 PUSHMARK (SP);
1822 PUTBACK;
1823 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1824
1825 FREETMPS;
1826 LEAVE;
1827}
1828
1829static int
1830api_ready (pTHX_ SV *coro_sv)
1831{
1832 struct coro *coro = SvSTATE (coro_sv);
1833
1834 if (coro->flags & CF_READY)
1835 return 0;
1836
1837 coro->flags |= CF_READY;
1838
1839 coro_enq (aTHX_ coro);
1840
1841 if (!coro_nready++)
1842 if (coroapi.readyhook)
1843 coroapi.readyhook ();
1844
1845 return 1;
1846}
1847
1848static int
1849api_is_ready (pTHX_ SV *coro_sv)
1850{
1851 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1852}
1853
1854/* expects to own a reference to next->hv */
1855ECB_INLINE void
1856prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1857{
1858 SV *prev_sv = SvRV (coro_current);
1859
1860 ta->prev = SvSTATE_hv (prev_sv);
1861 ta->next = next;
1862
1863 TRANSFER_CHECK (*ta);
1864
1865 SvRV_set (coro_current, (SV *)next->hv);
1866
1867 free_coro_mortal (aTHX);
1868 coro_mortal = prev_sv;
1869}
1870
1871static void
1872prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1873{
1874 for (;;)
1875 {
1876 struct coro *next = coro_deq (aTHX);
1877
1878 if (ecb_expect_true (next))
1879 {
1880 /* cannot transfer to destroyed coros, skip and look for next */
1881 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1882 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1883 else
1884 {
1885 next->flags &= ~CF_READY;
1886 --coro_nready;
1887
1888 prepare_schedule_to (aTHX_ ta, next);
1889 break;
1890 }
1891 }
1892 else
1893 {
1894 /* nothing to schedule: call the idle handler */
1895 if (SvROK (sv_idle)
1896 && SvOBJECT (SvRV (sv_idle)))
1897 {
1898 if (SvRV (sv_idle) == SvRV (coro_current))
1899 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1900
1901 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1902 api_ready (aTHX_ SvRV (sv_idle));
1903 --coro_nready;
1904 }
1905 else
1906 {
1907 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1908 dSP;
1909
1910 ENTER;
1911 SAVETMPS;
1912
1913 PUSHMARK (SP);
1914 PUTBACK;
1915 call_sv (sv_idle, G_VOID | G_DISCARD);
1916
1917 FREETMPS;
1918 LEAVE;
1919 }
1920 }
1921 }
1922}
1923
1924ECB_INLINE void
1925prepare_cede (pTHX_ struct coro_transfer_args *ta)
1926{
1927 api_ready (aTHX_ coro_current);
1928 prepare_schedule (aTHX_ ta);
1929}
1930
1931ECB_INLINE void
1932prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1933{
1934 SV *prev = SvRV (coro_current);
1935
1936 if (coro_nready)
1937 {
1938 prepare_schedule (aTHX_ ta);
1939 api_ready (aTHX_ prev);
1940 }
1941 else
1942 prepare_nop (aTHX_ ta);
1943}
1944
1945static void
1946api_schedule (pTHX)
1947{
1948 struct coro_transfer_args ta;
1949
1950 prepare_schedule (aTHX_ &ta);
1951 TRANSFER (ta, 1);
1952}
1953
1954static void
1955api_schedule_to (pTHX_ SV *coro_sv)
1956{
1957 struct coro_transfer_args ta;
1958 struct coro *next = SvSTATE (coro_sv);
1959
1960 SvREFCNT_inc_NN (coro_sv);
1961 prepare_schedule_to (aTHX_ &ta, next);
1962}
1963
1964static int
1965api_cede (pTHX)
1966{
1967 struct coro_transfer_args ta;
1968
1969 prepare_cede (aTHX_ &ta);
1970
1971 if (ecb_expect_true (ta.prev != ta.next))
1972 {
1973 TRANSFER (ta, 1);
1974 return 1;
1975 }
1976 else
1977 return 0;
1978}
1979
1980static int
1981api_cede_notself (pTHX)
1982{
1983 if (coro_nready)
1984 {
1985 struct coro_transfer_args ta;
1986
1987 prepare_cede_notself (aTHX_ &ta);
1988 TRANSFER (ta, 1);
1989 return 1;
1990 }
1991 else
1992 return 0;
1993}
1994
1995static void
1996api_trace (pTHX_ SV *coro_sv, int flags)
1997{
1998 struct coro *coro = SvSTATE (coro_sv);
1999
2000 if (coro->flags & CF_RUNNING)
2001 croak ("cannot enable tracing on a running coroutine, caught");
2002
2003 if (flags & CC_TRACE)
2004 {
2005 if (!coro->cctx)
2006 coro->cctx = cctx_new_run ();
2007 else if (!(coro->cctx->flags & CC_TRACE))
2008 croak ("cannot enable tracing on coroutine with custom stack, caught");
2009
2010 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2011 }
2012 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2013 {
2014 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2015
2016 if (coro->flags & CF_RUNNING)
2017 PL_runops = RUNOPS_DEFAULT;
2018 else
2019 coro->slot->runops = RUNOPS_DEFAULT;
2020 }
2021}
2022
2023static void
2024coro_push_av (pTHX_ AV *av, I32 gimme_v)
2025{
2026 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2027 {
2028 dSP;
2029
2030 if (gimme_v == G_SCALAR)
2031 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2032 else
2033 {
2034 int i;
2035 EXTEND (SP, AvFILLp (av) + 1);
2036
2037 for (i = 0; i <= AvFILLp (av); ++i)
2038 PUSHs (AvARRAY (av)[i]);
2039 }
2040
2041 PUTBACK;
2042 }
2043}
2044
2045static void
2046coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2047{
2048 if (!coro->on_destroy)
2049 coro->on_destroy = newAV ();
2050
2051 av_push (coro->on_destroy, cb);
2052}
2053
2054static void
2055slf_destroy_join (pTHX_ struct CoroSLF *frame)
2056{
2057 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2058}
2059
2060static int
2061slf_check_join (pTHX_ struct CoroSLF *frame)
2062{
2063 struct coro *coro = (struct coro *)frame->data;
2064
2065 if (!coro->status)
2066 return 1;
2067
2068 frame->destroy = 0;
2069
2070 coro_push_av (aTHX_ coro->status, GIMME_V);
2071
2072 SvREFCNT_dec ((SV *)coro->hv);
2073
2074 return 0;
2075}
2076
2077static void
2078slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{
2080 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2081
2082 if (items > 1)
2083 croak ("join called with too many arguments");
2084
2085 if (coro->status)
2086 frame->prepare = prepare_nop;
2087 else
2088 {
2089 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2090 frame->prepare = prepare_schedule;
2091 }
2092
2093 frame->check = slf_check_join;
2094 frame->destroy = slf_destroy_join;
2095 frame->data = (void *)coro;
2096 SvREFCNT_inc (coro->hv);
2097}
2098
2099static void
2100coro_call_on_destroy (pTHX_ struct coro *coro)
2101{
2102 AV *od = coro->on_destroy;
2103
2104 if (!od)
2105 return;
2106
2107 while (AvFILLp (od) >= 0)
2108 {
2109 SV *cb = sv_2mortal (av_pop (od));
2110
2111 /* coro hv's (and only hv's at the moment) are supported as well */
2112 if (SvSTATEhv_p (aTHX_ cb))
2113 api_ready (aTHX_ cb);
2114 else
2115 {
2116 dSP; /* don't disturb outer sp */
497 PUSHMARK(SP); 2117 PUSHMARK (SP);
498 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); 2118
499 /* 2119 if (coro->status)
500 * the next line is slightly wrong, as PL_op->op_next
501 * is actually being executed so we skip the first op.
502 * that doesn't matter, though, since it is only
503 * pp_nextstate and we never return...
504 * ah yes, and I don't care anyways ;)
505 */ 2120 {
2121 PUTBACK;
2122 coro_push_av (aTHX_ coro->status, G_ARRAY);
2123 SPAGAIN;
2124 }
2125
506 PUTBACK; 2126 PUTBACK;
507 PL_op = pp_entersub(aTHX); 2127 call_sv (cb, G_VOID | G_DISCARD);
508 SPAGAIN;
509
510 ENTER; /* necessary e.g. for dounwind */
511 } 2128 }
512 } 2129 }
513} 2130}
514 2131
2132static void
2133coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2134{
2135 AV *av;
2136
2137 if (coro->status)
2138 {
2139 av = coro->status;
2140 av_clear (av);
2141 }
2142 else
2143 av = coro->status = newAV ();
2144
2145 /* items are actually not so common, so optimise for this case */
2146 if (items)
2147 {
2148 int i;
2149
2150 av_extend (av, items - 1);
2151
2152 for (i = 0; i < items; ++i)
2153 av_push (av, SvREFCNT_inc_NN (arg [i]));
2154 }
2155}
2156
2157static void
2158slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2159{
2160 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2161 api_ready (aTHX_ sv_manager);
2162
2163 frame->prepare = prepare_schedule;
2164 frame->check = slf_check_repeat;
2165
2166 /* as a minor optimisation, we could unwind all stacks here */
2167 /* but that puts extra pressure on pp_slf, and is not worth much */
2168 /*coro_unwind_stacks (aTHX);*/
2169}
2170
2171static void
2172slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2173{
2174 HV *coro_hv = (HV *)SvRV (coro_current);
2175
2176 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2177 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2178}
2179
2180static void
2181slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2182{
2183 HV *coro_hv;
2184 struct coro *coro;
2185
2186 if (items <= 0)
2187 croak ("Coro::cancel called without coro object,");
2188
2189 coro = SvSTATE (arg [0]);
2190 coro_hv = coro->hv;
2191
2192 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2193
2194 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2195 {
2196 /* coro currently busy cancelling something, so just notify it */
2197 coro->slf_frame.data = (void *)coro;
2198
2199 frame->prepare = prepare_nop;
2200 frame->check = slf_check_nop;
2201 }
2202 else if (coro_hv == (HV *)SvRV (coro_current))
2203 {
2204 /* cancelling the current coro is allowed, and equals terminate */
2205 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2206 }
2207 else
2208 {
2209 struct coro *self = SvSTATE_current;
2210
2211 /* otherwise we cancel directly, purely for speed reasons
2212 * unfortunately, this requires some magic trickery, as
2213 * somebody else could cancel us, so we have to fight the cancellation.
2214 * this is ugly, and hopefully fully worth the extra speed.
2215 * besides, I can't get the slow-but-safe version working...
2216 */
2217 slf_frame.data = 0;
2218 self->flags |= CF_NOCANCEL;
2219 coro_state_destroy (aTHX_ coro);
2220 self->flags &= ~CF_NOCANCEL;
2221
2222 if (slf_frame.data)
2223 {
2224 /* while we were busy we have been cancelled, so terminate */
2225 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2226 }
2227 else
2228 {
2229 frame->prepare = prepare_nop;
2230 frame->check = slf_check_nop;
2231 }
2232 }
2233}
2234
2235static int
2236slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2237{
2238 frame->prepare = 0;
2239 coro_unwind_stacks (aTHX);
2240
2241 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2242
2243 return 1;
2244}
2245
2246static int
2247safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2248{
2249 if (coro->cctx)
2250 croak ("coro inside C callback, unable to cancel at this time, caught");
2251
2252 if (coro->flags & CF_NEW)
2253 {
2254 coro_set_status (aTHX_ coro, arg, items);
2255 coro_state_destroy (aTHX_ coro);
2256 }
2257 else
2258 {
2259 if (!coro->slf_frame.prepare)
2260 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2261
2262 slf_destroy (aTHX_ coro);
2263
2264 coro_set_status (aTHX_ coro, arg, items);
2265 coro->slf_frame.prepare = prepare_nop;
2266 coro->slf_frame.check = slf_check_safe_cancel;
2267
2268 api_ready (aTHX_ (SV *)coro->hv);
2269 }
2270
2271 return 1;
2272}
2273
2274/*****************************************************************************/
2275/* async pool handler */
2276
2277static int
2278slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2279{
2280 HV *hv = (HV *)SvRV (coro_current);
2281 struct coro *coro = (struct coro *)frame->data;
2282
2283 if (!coro->invoke_cb)
2284 return 1; /* loop till we have invoke */
2285 else
2286 {
2287 hv_store (hv, "desc", sizeof ("desc") - 1,
2288 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2289
2290 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2291
2292 {
2293 dSP;
2294 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2295 PUTBACK;
2296 }
2297
2298 SvREFCNT_dec (GvAV (PL_defgv));
2299 GvAV (PL_defgv) = coro->invoke_av;
2300 coro->invoke_av = 0;
2301
2302 return 0;
2303 }
2304}
2305
2306static void
2307slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2308{
2309 HV *hv = (HV *)SvRV (coro_current);
2310 struct coro *coro = SvSTATE_hv ((SV *)hv);
2311
2312 if (ecb_expect_true (coro->saved_deffh))
2313 {
2314 /* subsequent iteration */
2315 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2316 coro->saved_deffh = 0;
2317
2318 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2319 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2320 {
2321 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2322 return;
2323 }
2324 else
2325 {
2326 av_clear (GvAV (PL_defgv));
2327 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2328
2329 coro->prio = 0;
2330
2331 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2332 api_trace (aTHX_ coro_current, 0);
2333
2334 frame->prepare = prepare_schedule;
2335 av_push (av_async_pool, SvREFCNT_inc (hv));
2336 }
2337 }
2338 else
2339 {
2340 /* first iteration, simply fall through */
2341 frame->prepare = prepare_nop;
2342 }
2343
2344 frame->check = slf_check_pool_handler;
2345 frame->data = (void *)coro;
2346}
2347
2348/*****************************************************************************/
2349/* rouse callback */
2350
2351#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2352
2353static void
2354coro_rouse_callback (pTHX_ CV *cv)
2355{
2356 dXSARGS;
2357 SV *data = (SV *)S_GENSUB_ARG;
2358
2359 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2360 {
2361 /* first call, set args */
2362 SV *coro = SvRV (data);
2363 AV *av = newAV ();
2364
2365 SvRV_set (data, (SV *)av);
2366
2367 /* better take a full copy of the arguments */
2368 while (items--)
2369 av_store (av, items, newSVsv (ST (items)));
2370
2371 api_ready (aTHX_ coro);
2372 SvREFCNT_dec (coro);
2373 }
2374
2375 XSRETURN_EMPTY;
2376}
2377
2378static int
2379slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2380{
2381 SV *data = (SV *)frame->data;
2382
2383 if (CORO_THROW)
2384 return 0;
2385
2386 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2387 return 1;
2388
2389 /* now push all results on the stack */
2390 {
2391 dSP;
2392 AV *av = (AV *)SvRV (data);
2393 int i;
2394
2395 EXTEND (SP, AvFILLp (av) + 1);
2396 for (i = 0; i <= AvFILLp (av); ++i)
2397 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2398
2399 /* we have stolen the elements, so set length to zero and free */
2400 AvFILLp (av) = -1;
2401 av_undef (av);
2402
2403 PUTBACK;
2404 }
2405
2406 return 0;
2407}
2408
2409static void
2410slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2411{
2412 SV *cb;
2413
2414 if (items)
2415 cb = arg [0];
2416 else
2417 {
2418 struct coro *coro = SvSTATE_current;
2419
2420 if (!coro->rouse_cb)
2421 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2422
2423 cb = sv_2mortal (coro->rouse_cb);
2424 coro->rouse_cb = 0;
2425 }
2426
2427 if (!SvROK (cb)
2428 || SvTYPE (SvRV (cb)) != SVt_PVCV
2429 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2430 croak ("Coro::rouse_wait called with illegal callback argument,");
2431
2432 {
2433 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2434 SV *data = (SV *)S_GENSUB_ARG;
2435
2436 frame->data = (void *)data;
2437 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2438 frame->check = slf_check_rouse_wait;
2439 }
2440}
2441
2442static SV *
2443coro_new_rouse_cb (pTHX)
2444{
2445 HV *hv = (HV *)SvRV (coro_current);
2446 struct coro *coro = SvSTATE_hv (hv);
2447 SV *data = newRV_inc ((SV *)hv);
2448 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2449
2450 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2451 SvREFCNT_dec (data); /* magicext increases the refcount */
2452
2453 SvREFCNT_dec (coro->rouse_cb);
2454 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2455
2456 return cb;
2457}
2458
2459/*****************************************************************************/
2460/* schedule-like-function opcode (SLF) */
2461
2462static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2463static const CV *slf_cv;
2464static SV **slf_argv;
2465static int slf_argc, slf_arga; /* count, allocated */
2466static I32 slf_ax; /* top of stack, for restore */
2467
2468/* this restores the stack in the case we patched the entersub, to */
2469/* recreate the stack frame as perl will on following calls */
2470/* since entersub cleared the stack */
2471static OP *
2472pp_restore (pTHX)
2473{
2474 int i;
2475 SV **SP = PL_stack_base + slf_ax;
2476
2477 PUSHMARK (SP);
2478
2479 EXTEND (SP, slf_argc + 1);
2480
2481 for (i = 0; i < slf_argc; ++i)
2482 PUSHs (sv_2mortal (slf_argv [i]));
2483
2484 PUSHs ((SV *)CvGV (slf_cv));
2485
2486 RETURNOP (slf_restore.op_first);
2487}
2488
2489static void
2490slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2491{
2492 SV **arg = (SV **)slf_frame.data;
2493
2494 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2495}
2496
2497static void
2498slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2499{
2500 if (items != 2)
2501 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2502
2503 frame->prepare = slf_prepare_transfer;
2504 frame->check = slf_check_nop;
2505 frame->data = (void *)arg; /* let's hope it will stay valid */
2506}
2507
2508static void
2509slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2510{
2511 frame->prepare = prepare_schedule;
2512 frame->check = slf_check_nop;
2513}
2514
2515static void
2516slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2517{
2518 struct coro *next = (struct coro *)slf_frame.data;
2519
2520 SvREFCNT_inc_NN (next->hv);
2521 prepare_schedule_to (aTHX_ ta, next);
2522}
2523
2524static void
2525slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (!items)
2528 croak ("Coro::schedule_to expects a coroutine argument, caught");
2529
2530 frame->data = (void *)SvSTATE (arg [0]);
2531 frame->prepare = slf_prepare_schedule_to;
2532 frame->check = slf_check_nop;
2533}
2534
2535static void
2536slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 api_ready (aTHX_ SvRV (coro_current));
2539
2540 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2541}
2542
2543static void
2544slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2545{
2546 frame->prepare = prepare_cede;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 frame->prepare = prepare_cede_notself;
2554 frame->check = slf_check_nop;
2555}
2556
2557/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2558static void
2559slf_destroy (pTHX_ struct coro *coro)
2560{
2561 /* this callback is reserved for slf functions needing to do cleanup */
2562 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2563 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2564
2565 /*
2566 * The on_destroy above most likely is from an SLF call.
2567 * Since by definition the SLF call will not finish when we destroy
2568 * the coro, we will have to force-finish it here, otherwise
2569 * cleanup functions cannot call SLF functions.
2570 */
2571 coro->slf_frame.prepare = 0;
2572}
2573
2574/*
2575 * these not obviously related functions are all rolled into one
2576 * function to increase chances that they all will call transfer with the same
2577 * stack offset
2578 * SLF stands for "schedule-like-function".
2579 */
2580static OP *
2581pp_slf (pTHX)
2582{
2583 I32 checkmark; /* mark SP to see how many elements check has pushed */
2584
2585 /* set up the slf frame, unless it has already been set-up */
2586 /* the latter happens when a new coro has been started */
2587 /* or when a new cctx was attached to an existing coroutine */
2588 if (ecb_expect_true (!slf_frame.prepare))
2589 {
2590 /* first iteration */
2591 dSP;
2592 SV **arg = PL_stack_base + TOPMARK + 1;
2593 int items = SP - arg; /* args without function object */
2594 SV *gv = *sp;
2595
2596 /* do a quick consistency check on the "function" object, and if it isn't */
2597 /* for us, divert to the real entersub */
2598 if (SvTYPE (gv) != SVt_PVGV
2599 || !GvCV (gv)
2600 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2601 return PL_ppaddr[OP_ENTERSUB](aTHX);
2602
2603 if (!(PL_op->op_flags & OPf_STACKED))
2604 {
2605 /* ampersand-form of call, use @_ instead of stack */
2606 AV *av = GvAV (PL_defgv);
2607 arg = AvARRAY (av);
2608 items = AvFILLp (av) + 1;
2609 }
2610
2611 /* now call the init function, which needs to set up slf_frame */
2612 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2613 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2614
2615 /* pop args */
2616 SP = PL_stack_base + POPMARK;
2617
2618 PUTBACK;
2619 }
2620
2621 /* now that we have a slf_frame, interpret it! */
2622 /* we use a callback system not to make the code needlessly */
2623 /* complicated, but so we can run multiple perl coros from one cctx */
2624
2625 do
2626 {
2627 struct coro_transfer_args ta;
2628
2629 slf_frame.prepare (aTHX_ &ta);
2630 TRANSFER (ta, 0);
2631
2632 checkmark = PL_stack_sp - PL_stack_base;
2633 }
2634 while (slf_frame.check (aTHX_ &slf_frame));
2635
2636 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2637
2638 /* exception handling */
2639 if (ecb_expect_false (CORO_THROW))
2640 {
2641 SV *exception = sv_2mortal (CORO_THROW);
2642
2643 CORO_THROW = 0;
2644 sv_setsv (ERRSV, exception);
2645 croak (0);
2646 }
2647
2648 /* return value handling - mostly like entersub */
2649 /* make sure we put something on the stack in scalar context */
2650 if (GIMME_V == G_SCALAR
2651 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2652 {
2653 dSP;
2654 SV **bot = PL_stack_base + checkmark;
2655
2656 if (sp == bot) /* too few, push undef */
2657 bot [1] = &PL_sv_undef;
2658 else /* too many, take last one */
2659 bot [1] = *sp;
2660
2661 SP = bot + 1;
2662
2663 PUTBACK;
2664 }
2665
2666 return NORMAL;
2667}
2668
2669static void
2670api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2671{
2672 int i;
2673 SV **arg = PL_stack_base + ax;
2674 int items = PL_stack_sp - arg + 1;
2675
2676 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2677
2678 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2679 && PL_op->op_ppaddr != pp_slf)
2680 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2681
2682 CvFLAGS (cv) |= CVf_SLF;
2683 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2684 slf_cv = cv;
2685
2686 /* we patch the op, and then re-run the whole call */
2687 /* we have to put the same argument on the stack for this to work */
2688 /* and this will be done by pp_restore */
2689 slf_restore.op_next = (OP *)&slf_restore;
2690 slf_restore.op_type = OP_CUSTOM;
2691 slf_restore.op_ppaddr = pp_restore;
2692 slf_restore.op_first = PL_op;
2693
2694 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2695
2696 if (PL_op->op_flags & OPf_STACKED)
2697 {
2698 if (items > slf_arga)
2699 {
2700 slf_arga = items;
2701 Safefree (slf_argv);
2702 New (0, slf_argv, slf_arga, SV *);
2703 }
2704
2705 slf_argc = items;
2706
2707 for (i = 0; i < items; ++i)
2708 slf_argv [i] = SvREFCNT_inc (arg [i]);
2709 }
2710 else
2711 slf_argc = 0;
2712
2713 PL_op->op_ppaddr = pp_slf;
2714 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2715
2716 PL_op = (OP *)&slf_restore;
2717}
2718
2719/*****************************************************************************/
2720/* dynamic wind */
2721
2722static void
2723on_enterleave_call (pTHX_ SV *cb)
2724{
2725 dSP;
2726
2727 PUSHSTACK;
2728
2729 PUSHMARK (SP);
2730 PUTBACK;
2731 call_sv (cb, G_VOID | G_DISCARD);
2732 SPAGAIN;
2733
2734 POPSTACK;
2735}
2736
2737static SV *
2738coro_avp_pop_and_free (pTHX_ AV **avp)
2739{
2740 AV *av = *avp;
2741 SV *res = av_pop (av);
2742
2743 if (AvFILLp (av) < 0)
2744 {
2745 *avp = 0;
2746 SvREFCNT_dec (av);
2747 }
2748
2749 return res;
2750}
2751
2752static void
2753coro_pop_on_enter (pTHX_ void *coro)
2754{
2755 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2756 SvREFCNT_dec (cb);
2757}
2758
2759static void
2760coro_pop_on_leave (pTHX_ void *coro)
2761{
2762 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2763 on_enterleave_call (aTHX_ sv_2mortal (cb));
2764}
2765
2766/*****************************************************************************/
2767/* PerlIO::cede */
2768
2769typedef struct
2770{
2771 PerlIOBuf base;
2772 NV next, every;
2773} PerlIOCede;
2774
2775static IV ecb_cold
2776PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2777{
2778 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2779
2780 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2781 self->next = nvtime () + self->every;
2782
2783 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2784}
2785
2786static SV * ecb_cold
2787PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2788{
2789 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2790
2791 return newSVnv (self->every);
2792}
2793
2794static IV
2795PerlIOCede_flush (pTHX_ PerlIO *f)
2796{
2797 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2798 double now = nvtime ();
2799
2800 if (now >= self->next)
2801 {
2802 api_cede (aTHX);
2803 self->next = now + self->every;
2804 }
2805
2806 return PerlIOBuf_flush (aTHX_ f);
2807}
2808
2809static PerlIO_funcs PerlIO_cede =
2810{
2811 sizeof(PerlIO_funcs),
2812 "cede",
2813 sizeof(PerlIOCede),
2814 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2815 PerlIOCede_pushed,
2816 PerlIOBuf_popped,
2817 PerlIOBuf_open,
2818 PerlIOBase_binmode,
2819 PerlIOCede_getarg,
2820 PerlIOBase_fileno,
2821 PerlIOBuf_dup,
2822 PerlIOBuf_read,
2823 PerlIOBuf_unread,
2824 PerlIOBuf_write,
2825 PerlIOBuf_seek,
2826 PerlIOBuf_tell,
2827 PerlIOBuf_close,
2828 PerlIOCede_flush,
2829 PerlIOBuf_fill,
2830 PerlIOBase_eof,
2831 PerlIOBase_error,
2832 PerlIOBase_clearerr,
2833 PerlIOBase_setlinebuf,
2834 PerlIOBuf_get_base,
2835 PerlIOBuf_bufsiz,
2836 PerlIOBuf_get_ptr,
2837 PerlIOBuf_get_cnt,
2838 PerlIOBuf_set_ptrcnt,
2839};
2840
2841/*****************************************************************************/
2842/* Coro::Semaphore & Coro::Signal */
2843
2844static SV *
2845coro_waitarray_new (pTHX_ int count)
2846{
2847 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2848 AV *av = newAV ();
2849 SV **ary;
2850
2851 /* unfortunately, building manually saves memory */
2852 Newx (ary, 2, SV *);
2853 AvALLOC (av) = ary;
2854#if PERL_VERSION_ATLEAST (5,10,0)
2855 AvARRAY (av) = ary;
2856#else
2857 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2858 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2859 SvPVX ((SV *)av) = (char *)ary;
2860#endif
2861 AvMAX (av) = 1;
2862 AvFILLp (av) = 0;
2863 ary [0] = newSViv (count);
2864
2865 return newRV_noinc ((SV *)av);
2866}
2867
2868/* semaphore */
2869
2870static void
2871coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2872{
2873 SV *count_sv = AvARRAY (av)[0];
2874 IV count = SvIVX (count_sv);
2875
2876 count += adjust;
2877 SvIVX (count_sv) = count;
2878
2879 /* now wake up as many waiters as are expected to lock */
2880 while (count > 0 && AvFILLp (av) > 0)
2881 {
2882 SV *cb;
2883
2884 /* swap first two elements so we can shift a waiter */
2885 AvARRAY (av)[0] = AvARRAY (av)[1];
2886 AvARRAY (av)[1] = count_sv;
2887 cb = av_shift (av);
2888
2889 if (SvOBJECT (cb))
2890 {
2891 api_ready (aTHX_ cb);
2892 --count;
2893 }
2894 else if (SvTYPE (cb) == SVt_PVCV)
2895 {
2896 dSP;
2897 PUSHMARK (SP);
2898 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2899 PUTBACK;
2900 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2901 }
2902
2903 SvREFCNT_dec (cb);
2904 }
2905}
2906
2907static void
2908coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2909{
2910 /* call $sem->adjust (0) to possibly wake up some other waiters */
2911 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2912}
2913
2914static int
2915slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2916{
2917 AV *av = (AV *)frame->data;
2918 SV *count_sv = AvARRAY (av)[0];
2919 SV *coro_hv = SvRV (coro_current);
2920
2921 /* if we are about to throw, don't actually acquire the lock, just throw */
2922 if (CORO_THROW)
2923 return 0;
2924 else if (SvIVX (count_sv) > 0)
2925 {
2926 frame->destroy = 0;
2927
2928 if (acquire)
2929 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2930 else
2931 coro_semaphore_adjust (aTHX_ av, 0);
2932
2933 return 0;
2934 }
2935 else
2936 {
2937 int i;
2938 /* if we were woken up but can't down, we look through the whole */
2939 /* waiters list and only add us if we aren't in there already */
2940 /* this avoids some degenerate memory usage cases */
2941 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2942 if (AvARRAY (av)[i] == coro_hv)
2943 return 1;
2944
2945 av_push (av, SvREFCNT_inc (coro_hv));
2946 return 1;
2947 }
2948}
2949
2950static int
2951slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2952{
2953 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2954}
2955
2956static int
2957slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2958{
2959 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2960}
2961
2962static void
2963slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2964{
2965 AV *av = (AV *)SvRV (arg [0]);
2966
2967 if (SvIVX (AvARRAY (av)[0]) > 0)
2968 {
2969 frame->data = (void *)av;
2970 frame->prepare = prepare_nop;
2971 }
2972 else
2973 {
2974 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2975
2976 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2977 frame->prepare = prepare_schedule;
2978 /* to avoid race conditions when a woken-up coro gets terminated */
2979 /* we arrange for a temporary on_destroy that calls adjust (0) */
2980 frame->destroy = coro_semaphore_destroy;
2981 }
2982}
2983
2984static void
2985slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2986{
2987 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2988 frame->check = slf_check_semaphore_down;
2989}
2990
2991static void
2992slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2993{
2994 if (items >= 2)
2995 {
2996 /* callback form */
2997 AV *av = (AV *)SvRV (arg [0]);
2998 SV *cb_cv = s_get_cv_croak (arg [1]);
2999
3000 av_push (av, SvREFCNT_inc_NN (cb_cv));
3001
3002 if (SvIVX (AvARRAY (av)[0]) > 0)
3003 coro_semaphore_adjust (aTHX_ av, 0);
3004
3005 frame->prepare = prepare_nop;
3006 frame->check = slf_check_nop;
3007 }
3008 else
3009 {
3010 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3011 frame->check = slf_check_semaphore_wait;
3012 }
3013}
3014
3015/* signal */
3016
3017static void
3018coro_signal_wake (pTHX_ AV *av, int count)
3019{
3020 SvIVX (AvARRAY (av)[0]) = 0;
3021
3022 /* now signal count waiters */
3023 while (count > 0 && AvFILLp (av) > 0)
3024 {
3025 SV *cb;
3026
3027 /* swap first two elements so we can shift a waiter */
3028 cb = AvARRAY (av)[0];
3029 AvARRAY (av)[0] = AvARRAY (av)[1];
3030 AvARRAY (av)[1] = cb;
3031
3032 cb = av_shift (av);
3033
3034 if (SvTYPE (cb) == SVt_PVCV)
3035 {
3036 dSP;
3037 PUSHMARK (SP);
3038 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3039 PUTBACK;
3040 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3041 }
3042 else
3043 {
3044 api_ready (aTHX_ cb);
3045 sv_setiv (cb, 0); /* signal waiter */
3046 }
3047
3048 SvREFCNT_dec (cb);
3049
3050 --count;
3051 }
3052}
3053
3054static int
3055slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3056{
3057 /* if we are about to throw, also stop waiting */
3058 return SvROK ((SV *)frame->data) && !CORO_THROW;
3059}
3060
3061static void
3062slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3063{
3064 AV *av = (AV *)SvRV (arg [0]);
3065
3066 if (items >= 2)
3067 {
3068 SV *cb_cv = s_get_cv_croak (arg [1]);
3069 av_push (av, SvREFCNT_inc_NN (cb_cv));
3070
3071 if (SvIVX (AvARRAY (av)[0]))
3072 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3073
3074 frame->prepare = prepare_nop;
3075 frame->check = slf_check_nop;
3076 }
3077 else if (SvIVX (AvARRAY (av)[0]))
3078 {
3079 SvIVX (AvARRAY (av)[0]) = 0;
3080 frame->prepare = prepare_nop;
3081 frame->check = slf_check_nop;
3082 }
3083 else
3084 {
3085 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3086
3087 av_push (av, waiter);
3088
3089 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3090 frame->prepare = prepare_schedule;
3091 frame->check = slf_check_signal_wait;
3092 }
3093}
3094
3095/*****************************************************************************/
3096/* Coro::AIO */
3097
3098#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3099
3100/* helper storage struct */
3101struct io_state
3102{
3103 int errorno;
3104 I32 laststype; /* U16 in 5.10.0 */
3105 int laststatval;
3106 Stat_t statcache;
3107};
3108
3109static void
3110coro_aio_callback (pTHX_ CV *cv)
3111{
3112 dXSARGS;
3113 AV *state = (AV *)S_GENSUB_ARG;
3114 SV *coro = av_pop (state);
3115 SV *data_sv = newSV (sizeof (struct io_state));
3116
3117 av_extend (state, items - 1);
3118
3119 sv_upgrade (data_sv, SVt_PV);
3120 SvCUR_set (data_sv, sizeof (struct io_state));
3121 SvPOK_only (data_sv);
3122
3123 {
3124 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3125
3126 data->errorno = errno;
3127 data->laststype = PL_laststype;
3128 data->laststatval = PL_laststatval;
3129 data->statcache = PL_statcache;
3130 }
3131
3132 /* now build the result vector out of all the parameters and the data_sv */
3133 {
3134 int i;
3135
3136 for (i = 0; i < items; ++i)
3137 av_push (state, SvREFCNT_inc_NN (ST (i)));
3138 }
3139
3140 av_push (state, data_sv);
3141
3142 api_ready (aTHX_ coro);
3143 SvREFCNT_dec (coro);
3144 SvREFCNT_dec ((AV *)state);
3145}
3146
3147static int
3148slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3149{
3150 AV *state = (AV *)frame->data;
3151
3152 /* if we are about to throw, return early */
3153 /* this does not cancel the aio request, but at least */
3154 /* it quickly returns */
3155 if (CORO_THROW)
3156 return 0;
3157
3158 /* one element that is an RV? repeat! */
3159 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3160 return 1;
3161
3162 /* restore status */
3163 {
3164 SV *data_sv = av_pop (state);
3165 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3166
3167 errno = data->errorno;
3168 PL_laststype = data->laststype;
3169 PL_laststatval = data->laststatval;
3170 PL_statcache = data->statcache;
3171
3172 SvREFCNT_dec (data_sv);
3173 }
3174
3175 /* push result values */
3176 {
3177 dSP;
3178 int i;
3179
3180 EXTEND (SP, AvFILLp (state) + 1);
3181 for (i = 0; i <= AvFILLp (state); ++i)
3182 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3183
3184 PUTBACK;
3185 }
3186
3187 return 0;
3188}
3189
3190static void
3191slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3192{
3193 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3194 SV *coro_hv = SvRV (coro_current);
3195 struct coro *coro = SvSTATE_hv (coro_hv);
3196
3197 /* put our coroutine id on the state arg */
3198 av_push (state, SvREFCNT_inc_NN (coro_hv));
3199
3200 /* first see whether we have a non-zero priority and set it as AIO prio */
3201 if (coro->prio)
3202 {
3203 dSP;
3204
3205 static SV *prio_cv;
3206 static SV *prio_sv;
3207
3208 if (ecb_expect_false (!prio_cv))
3209 {
3210 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3211 prio_sv = newSViv (0);
3212 }
3213
3214 PUSHMARK (SP);
3215 sv_setiv (prio_sv, coro->prio);
3216 XPUSHs (prio_sv);
3217
3218 PUTBACK;
3219 call_sv (prio_cv, G_VOID | G_DISCARD);
3220 }
3221
3222 /* now call the original request */
3223 {
3224 dSP;
3225 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3226 int i;
3227
3228 PUSHMARK (SP);
3229
3230 /* first push all args to the stack */
3231 EXTEND (SP, items + 1);
3232
3233 for (i = 0; i < items; ++i)
3234 PUSHs (arg [i]);
3235
3236 /* now push the callback closure */
3237 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3238
3239 /* now call the AIO function - we assume our request is uncancelable */
3240 PUTBACK;
3241 call_sv ((SV *)req, G_VOID | G_DISCARD);
3242 }
3243
3244 /* now that the request is going, we loop till we have a result */
3245 frame->data = (void *)state;
3246 frame->prepare = prepare_schedule;
3247 frame->check = slf_check_aio_req;
3248}
3249
3250static void
3251coro_aio_req_xs (pTHX_ CV *cv)
3252{
3253 dXSARGS;
3254
3255 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3256
3257 XSRETURN_EMPTY;
3258}
3259
3260/*****************************************************************************/
3261
3262#if CORO_CLONE
3263# include "clone.c"
3264#endif
3265
3266/*****************************************************************************/
3267
3268static SV *
3269coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3270{
3271 SV *coro_sv;
3272 struct coro *coro;
3273 MAGIC *mg;
3274 HV *hv;
3275 SV *cb;
3276 int i;
3277
3278 if (argc > 0)
3279 {
3280 cb = s_get_cv_croak (argv [0]);
3281
3282 if (!is_coro)
3283 {
3284 if (CvISXSUB (cb))
3285 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3286
3287 if (!CvROOT (cb))
3288 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3289 }
3290 }
3291
3292 Newz (0, coro, 1, struct coro);
3293 coro->args = newAV ();
3294 coro->flags = CF_NEW;
3295
3296 if (coro_first) coro_first->prev = coro;
3297 coro->next = coro_first;
3298 coro_first = coro;
3299
3300 coro->hv = hv = newHV ();
3301 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3302 mg->mg_flags |= MGf_DUP;
3303 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3304
3305 if (argc > 0)
3306 {
3307 av_extend (coro->args, argc + is_coro - 1);
3308
3309 if (is_coro)
3310 {
3311 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3312 cb = (SV *)cv_coro_run;
3313 }
3314
3315 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3316
3317 for (i = 1; i < argc; i++)
3318 av_push (coro->args, newSVsv (argv [i]));
3319 }
3320
3321 return coro_sv;
3322}
3323
3324#ifndef __cplusplus
3325ecb_cold XS(boot_Coro__State);
3326#endif
3327
515MODULE = Coro::State PACKAGE = Coro::State 3328MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
516 3329
517PROTOTYPES: ENABLE 3330PROTOTYPES: DISABLE
518 3331
519BOOT: 3332BOOT:
520{ /* {} necessary for stoopid perl-5.6.x */ 3333{
3334#ifdef USE_ITHREADS
3335# if CORO_PTHREAD
3336 coro_thx = PERL_GET_CONTEXT;
3337# endif
3338#endif
3339 BOOT_PAGESIZE;
3340
3341 cctx_current = cctx_new_empty ();
3342
3343 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3344 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3345
3346 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3347 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3348 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3349
3350 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3351 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3352 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3353
521 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 3354 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
522 3355
523 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3356 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
524 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3357 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
525 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3358 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
526 3359 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
527 if (!padlist_cache)
528 padlist_cache = newHV ();
529 3360
530 main_mainstack = PL_mainstack; 3361 main_mainstack = PL_mainstack;
531} 3362 main_top_env = PL_top_env;
532 3363
533Coro::State 3364 while (main_top_env->je_prev)
534_newprocess(args) 3365 main_top_env = main_top_env->je_prev;
535 SV * args 3366
3367 {
3368 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3369
3370 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3371 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3372
3373 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3374 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3375 }
3376
3377 coroapi.ver = CORO_API_VERSION;
3378 coroapi.rev = CORO_API_REVISION;
3379
3380 coroapi.transfer = api_transfer;
3381
3382 coroapi.sv_state = SvSTATE_;
3383 coroapi.execute_slf = api_execute_slf;
3384 coroapi.prepare_nop = prepare_nop;
3385 coroapi.prepare_schedule = prepare_schedule;
3386 coroapi.prepare_cede = prepare_cede;
3387 coroapi.prepare_cede_notself = prepare_cede_notself;
3388
3389 time_init (aTHX);
3390
3391 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3392}
3393
3394SV *
3395new (SV *klass, ...)
3396 ALIAS:
3397 Coro::new = 1
3398 CODE:
3399 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3400 OUTPUT:
3401 RETVAL
3402
3403void
3404transfer (...)
3405 PROTOTYPE: $$
3406 CODE:
3407 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3408
3409void
3410_exit (int code)
536 PROTOTYPE: $ 3411 PROTOTYPE: $
3412 CODE:
3413 _exit (code);
3414
3415SV *
3416clone (Coro::State coro)
3417 CODE:
3418{
3419#if CORO_CLONE
3420 struct coro *ncoro = coro_clone (aTHX_ coro);
3421 MAGIC *mg;
3422 /* TODO: too much duplication */
3423 ncoro->hv = newHV ();
3424 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3425 mg->mg_flags |= MGf_DUP;
3426 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3427#else
3428 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3429#endif
3430}
3431 OUTPUT:
3432 RETVAL
3433
3434int
3435cctx_stacksize (int new_stacksize = 0)
3436 PROTOTYPE: ;$
3437 CODE:
3438 RETVAL = cctx_stacksize;
3439 if (new_stacksize)
3440 {
3441 cctx_stacksize = new_stacksize;
3442 ++cctx_gen;
3443 }
3444 OUTPUT:
3445 RETVAL
3446
3447int
3448cctx_max_idle (int max_idle = 0)
3449 PROTOTYPE: ;$
3450 CODE:
3451 RETVAL = cctx_max_idle;
3452 if (max_idle > 1)
3453 cctx_max_idle = max_idle;
3454 OUTPUT:
3455 RETVAL
3456
3457int
3458cctx_count ()
3459 PROTOTYPE:
3460 CODE:
3461 RETVAL = cctx_count;
3462 OUTPUT:
3463 RETVAL
3464
3465int
3466cctx_idle ()
3467 PROTOTYPE:
3468 CODE:
3469 RETVAL = cctx_idle;
3470 OUTPUT:
3471 RETVAL
3472
3473void
3474list ()
3475 PROTOTYPE:
3476 PPCODE:
3477{
3478 struct coro *coro;
3479 for (coro = coro_first; coro; coro = coro->next)
3480 if (coro->hv)
3481 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3482}
3483
3484void
3485call (Coro::State coro, SV *coderef)
3486 ALIAS:
3487 eval = 1
3488 CODE:
3489{
3490 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3491 {
3492 struct coro *current = SvSTATE_current;
3493 struct CoroSLF slf_save;
3494
3495 if (current != coro)
3496 {
3497 PUTBACK;
3498 save_perl (aTHX_ current);
3499 load_perl (aTHX_ coro);
3500 /* the coro is most likely in an active SLF call.
3501 * while not strictly required (the code we execute is
3502 * not allowed to call any SLF functions), it's cleaner
3503 * to reinitialise the slf_frame and restore it later.
3504 * This might one day allow us to actually do SLF calls
3505 * from code executed here.
3506 */
3507 slf_save = slf_frame;
3508 slf_frame.prepare = 0;
3509 SPAGAIN;
3510 }
3511
3512 PUSHSTACK;
3513
3514 PUSHMARK (SP);
3515 PUTBACK;
3516
3517 if (ix)
3518 eval_sv (coderef, 0);
3519 else
3520 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3521
3522 POPSTACK;
3523 SPAGAIN;
3524
3525 if (current != coro)
3526 {
3527 PUTBACK;
3528 slf_frame = slf_save;
3529 save_perl (aTHX_ coro);
3530 load_perl (aTHX_ current);
3531 SPAGAIN;
3532 }
3533 }
3534}
3535
3536SV *
3537is_ready (Coro::State coro)
3538 PROTOTYPE: $
3539 ALIAS:
3540 is_ready = CF_READY
3541 is_running = CF_RUNNING
3542 is_new = CF_NEW
3543 is_destroyed = CF_ZOMBIE
3544 is_zombie = CF_ZOMBIE
3545 is_suspended = CF_SUSPENDED
3546 CODE:
3547 RETVAL = boolSV (coro->flags & ix);
3548 OUTPUT:
3549 RETVAL
3550
3551void
3552throw (Coro::State self, SV *exception = &PL_sv_undef)
3553 PROTOTYPE: $;$
537 CODE: 3554 CODE:
538 Coro__State coro; 3555{
3556 struct coro *current = SvSTATE_current;
3557 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3558 SvREFCNT_dec (*exceptionp);
3559 SvGETMAGIC (exception);
3560 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3561}
539 3562
540 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3563void
541 croak ("Coro::State::_newprocess expects an arrayref"); 3564api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3565 PROTOTYPE: $;$
3566 C_ARGS: aTHX_ coro, flags
3567
3568SV *
3569has_cctx (Coro::State coro)
3570 PROTOTYPE: $
3571 CODE:
3572 /* maybe manage the running flag differently */
3573 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3574 OUTPUT:
3575 RETVAL
3576
3577int
3578is_traced (Coro::State coro)
3579 PROTOTYPE: $
3580 CODE:
3581 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3582 OUTPUT:
3583 RETVAL
3584
3585UV
3586rss (Coro::State coro)
3587 PROTOTYPE: $
3588 ALIAS:
3589 usecount = 1
3590 CODE:
3591 switch (ix)
3592 {
3593 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3594 case 1: RETVAL = coro->usecount; break;
542 3595 }
543 New (0, coro, 1, struct coro); 3596 OUTPUT:
544
545 coro->mainstack = 0; /* actual work is done inside transfer */
546 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
547
548 RETVAL = coro; 3597 RETVAL
3598
3599void
3600force_cctx ()
3601 PROTOTYPE:
3602 CODE:
3603 cctx_current->idle_sp = 0;
3604
3605void
3606swap_defsv (Coro::State self)
3607 PROTOTYPE: $
3608 ALIAS:
3609 swap_defav = 1
3610 CODE:
3611 if (!self->slot)
3612 croak ("cannot swap state with coroutine that has no saved state,");
3613 else
3614 {
3615 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3616 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3617
3618 SV *tmp = *src; *src = *dst; *dst = tmp;
3619 }
3620
3621void
3622cancel (Coro::State self)
3623 CODE:
3624 coro_state_destroy (aTHX_ self);
3625
3626SV *
3627enable_times (int enabled = enable_times)
3628 CODE:
3629{
3630 RETVAL = boolSV (enable_times);
3631
3632 if (enabled != enable_times)
3633 {
3634 enable_times = enabled;
3635
3636 coro_times_update ();
3637 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3638 }
3639}
549 OUTPUT: 3640 OUTPUT:
550 RETVAL 3641 RETVAL
551 3642
552void 3643void
553transfer(prev, next, flags = TRANSFER_SAVE_ALL) 3644times (Coro::State self)
554 Coro::State_or_hashref prev 3645 PPCODE:
555 Coro::State_or_hashref next 3646{
556 int flags 3647 struct coro *current = SvSTATE (coro_current);
557 PROTOTYPE: @ 3648
3649 if (ecb_expect_false (current == self))
3650 {
3651 coro_times_update ();
3652 coro_times_add (SvSTATE (coro_current));
3653 }
3654
3655 EXTEND (SP, 2);
3656 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3657 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3658
3659 if (ecb_expect_false (current == self))
3660 coro_times_sub (SvSTATE (coro_current));
3661}
3662
3663void
3664swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3665 CODE:
3666{
3667 struct coro *current = SvSTATE_current;
3668
3669 if (current == coro)
3670 SWAP_SVS (current);
3671
3672 if (!coro->swap_sv)
3673 coro->swap_sv = newAV ();
3674
3675 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3676 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3677
3678 if (current == coro)
3679 SWAP_SVS (current);
3680}
3681
3682
3683MODULE = Coro::State PACKAGE = Coro
3684
3685BOOT:
3686{
3687 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3688 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3689 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3690 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3691 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3692 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3693 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3694 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3695
3696 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3697 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3698 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3699 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3700
3701 coro_stash = gv_stashpv ("Coro", TRUE);
3702
3703 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3704 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3705 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3706 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3707 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3708 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3709
3710 {
3711 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3712
3713 coroapi.schedule = api_schedule;
3714 coroapi.schedule_to = api_schedule_to;
3715 coroapi.cede = api_cede;
3716 coroapi.cede_notself = api_cede_notself;
3717 coroapi.ready = api_ready;
3718 coroapi.is_ready = api_is_ready;
3719 coroapi.nready = coro_nready;
3720 coroapi.current = coro_current;
3721
3722 /*GCoroAPI = &coroapi;*/
3723 sv_setiv (sv, (IV)&coroapi);
3724 SvREADONLY_on (sv);
3725 }
3726}
3727
3728SV *
3729async (...)
3730 PROTOTYPE: &@
558 CODE: 3731 CODE:
559 3732 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
560 transfer (aTHX_ prev, next, flags); 3733 api_ready (aTHX_ RETVAL);
3734 OUTPUT:
3735 RETVAL
561 3736
562void 3737void
563DESTROY(coro) 3738_destroy (Coro::State coro)
564 Coro::State coro 3739 CODE:
3740 /* used by the manager thread */
3741 coro_state_destroy (aTHX_ coro);
3742
3743void
3744on_destroy (Coro::State coro, SV *cb)
3745 CODE:
3746 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3747
3748void
3749join (...)
3750 CODE:
3751 CORO_EXECUTE_SLF_XS (slf_init_join);
3752
3753void
3754terminate (...)
3755 CODE:
3756 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3757
3758void
3759cancel (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3762
3763int
3764safe_cancel (Coro::State self, ...)
3765 C_ARGS: aTHX_ self, &ST (1), items - 1
3766
3767void
3768schedule (...)
3769 CODE:
3770 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3771
3772void
3773schedule_to (...)
3774 CODE:
3775 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3776
3777void
3778cede_to (...)
3779 CODE:
3780 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3781
3782void
3783cede (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_cede);
3786
3787void
3788cede_notself (...)
3789 CODE:
3790 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3791
3792void
3793_set_current (SV *current)
3794 PROTOTYPE: $
3795 CODE:
3796 SvREFCNT_dec (SvRV (coro_current));
3797 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3798
3799void
3800_set_readyhook (SV *hook)
3801 PROTOTYPE: $
565 CODE: 3802 CODE:
566 3803 SvREFCNT_dec (coro_readyhook);
567 if (coro->mainstack && coro->mainstack != main_mainstack) 3804 SvGETMAGIC (hook);
3805 if (SvOK (hook))
3806 {
3807 coro_readyhook = newSVsv (hook);
3808 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3809 }
3810 else
568 { 3811 {
569 struct coro temp; 3812 coro_readyhook = 0;
570 3813 CORO_READYHOOK = 0;
571 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
572 LOAD(aTHX_ coro);
573
574 destroy_stacks ();
575
576 LOAD((&temp)); /* this will get rid of defsv etc.. */
577 } 3814 }
578 3815
579 Safefree (coro); 3816int
3817prio (Coro::State coro, int newprio = 0)
3818 PROTOTYPE: $;$
3819 ALIAS:
3820 nice = 1
3821 CODE:
3822{
3823 RETVAL = coro->prio;
580 3824
581 /* 3825 if (items > 1)
582 * there is one problematic case left (remember _recurse?)
583 * consider the case when we
584 * 3826 {
585 * 1. start a coroutine 3827 if (ix)
586 * 2. inside it descend into some xs functions 3828 newprio = coro->prio - newprio;
587 * 3. xs function calls a callback 3829
588 * 4. callback switches to $main 3830 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
589 * 5. $main ends - we will end inside the xs function 3831 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
590 * 6. xs function returns and perl executes - what? 3832
3833 coro->prio = newprio;
591 * 3834 }
592 * to avoid this case we recurse in this function 3835}
593 * and simply call my_exit(0), skipping other xs functions 3836 OUTPUT:
594 */ 3837 RETVAL
595 3838
596#if 0 3839SV *
3840ready (SV *self)
3841 PROTOTYPE: $
3842 CODE:
3843 RETVAL = boolSV (api_ready (aTHX_ self));
3844 OUTPUT:
3845 RETVAL
3846
3847int
3848nready (...)
3849 PROTOTYPE:
3850 CODE:
3851 RETVAL = coro_nready;
3852 OUTPUT:
3853 RETVAL
3854
597void 3855void
598_recurse() 3856suspend (Coro::State self)
3857 PROTOTYPE: $
599 CODE: 3858 CODE:
600 LEAVE; 3859 self->flags |= CF_SUSPENDED;
601 PL_stack_sp = PL_stack_base + ax - 1;
602 PL_op = PL_op->op_next;
603 CALLRUNOPS(aTHX);
604 printf ("my_exit\n");
605 my_exit (0);
606
607#endif
608 3860
609void 3861void
610flush() 3862resume (Coro::State self)
3863 PROTOTYPE: $
611 CODE: 3864 CODE:
612#ifdef MAY_FLUSH 3865 self->flags &= ~CF_SUSPENDED;
613 flush_padlist_cache ();
614#endif
615
616MODULE = Coro::State PACKAGE = Coro::Cont
617
618# this is dirty (do you hear me?) and should be in it's own .xs
619 3866
620void 3867void
621result(...) 3868_pool_handler (...)
3869 CODE:
3870 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3871
3872void
3873async_pool (SV *cv, ...)
622 PROTOTYPE: @ 3874 PROTOTYPE: &@
3875 PPCODE:
3876{
3877 HV *hv = (HV *)av_pop (av_async_pool);
3878 AV *av = newAV ();
3879 SV *cb = ST (0);
3880 int i;
3881
3882 av_extend (av, items - 2);
3883 for (i = 1; i < items; ++i)
3884 av_push (av, SvREFCNT_inc_NN (ST (i)));
3885
3886 if ((SV *)hv == &PL_sv_undef)
3887 {
3888 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3889 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3890 SvREFCNT_dec (sv);
3891 }
3892
3893 {
3894 struct coro *coro = SvSTATE_hv (hv);
3895
3896 assert (!coro->invoke_cb);
3897 assert (!coro->invoke_av);
3898 coro->invoke_cb = SvREFCNT_inc (cb);
3899 coro->invoke_av = av;
3900 }
3901
3902 api_ready (aTHX_ (SV *)hv);
3903
3904 if (GIMME_V != G_VOID)
3905 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3906 else
3907 SvREFCNT_dec (hv);
3908}
3909
3910SV *
3911rouse_cb ()
3912 PROTOTYPE:
3913 CODE:
3914 RETVAL = coro_new_rouse_cb (aTHX);
3915 OUTPUT:
3916 RETVAL
3917
3918void
3919rouse_wait (...)
3920 PROTOTYPE: ;$
3921 PPCODE:
3922 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3923
3924void
3925on_enter (SV *block)
3926 ALIAS:
3927 on_leave = 1
3928 PROTOTYPE: &
3929 CODE:
3930{
3931 struct coro *coro = SvSTATE_current;
3932 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3933
3934 block = s_get_cv_croak (block);
3935
3936 if (!*avp)
3937 *avp = newAV ();
3938
3939 av_push (*avp, SvREFCNT_inc (block));
3940
3941 if (!ix)
3942 on_enterleave_call (aTHX_ block);
3943
3944 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3945 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3946 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3947}
3948
3949
3950MODULE = Coro::State PACKAGE = PerlIO::cede
3951
3952BOOT:
3953 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3954
3955
3956MODULE = Coro::State PACKAGE = Coro::Semaphore
3957
3958SV *
3959new (SV *klass, SV *count = 0)
3960 CODE:
3961{
3962 int semcnt = 1;
3963
3964 if (count)
3965 {
3966 SvGETMAGIC (count);
3967
3968 if (SvOK (count))
3969 semcnt = SvIV (count);
3970 }
3971
3972 RETVAL = sv_bless (
3973 coro_waitarray_new (aTHX_ semcnt),
3974 GvSTASH (CvGV (cv))
3975 );
3976}
3977 OUTPUT:
3978 RETVAL
3979
3980# helper for Coro::Channel and others
3981SV *
3982_alloc (int count)
3983 CODE:
3984 RETVAL = coro_waitarray_new (aTHX_ count);
3985 OUTPUT:
3986 RETVAL
3987
3988SV *
3989count (SV *self)
3990 CODE:
3991 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3992 OUTPUT:
3993 RETVAL
3994
3995void
3996up (SV *self, int adjust = 1)
3997 ALIAS:
3998 adjust = 1
623 CODE: 3999 CODE:
624 static SV *returnstk; 4000 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
625 SV *sv;
626 AV *defav = GvAV (PL_defgv);
627 struct coro *prev, *next;
628 4001
629 if (!returnstk) 4002void
630 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 4003down (...)
4004 CODE:
4005 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
631 4006
632 /* set up @_ -- ugly */ 4007void
633 av_clear (defav); 4008wait (...)
634 av_fill (defav, items - 1); 4009 CODE:
635 while (items--) 4010 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
636 av_store (defav, items, SvREFCNT_inc (ST(items)));
637 4011
638 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 4012void
639 sv = av_pop ((AV *)SvRV (returnstk)); 4013try (SV *self)
640 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 4014 PPCODE:
641 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 4015{
642 SvREFCNT_dec (sv); 4016 AV *av = (AV *)SvRV (self);
643 transfer(prev, next, 0); 4017 SV *count_sv = AvARRAY (av)[0];
4018 IV count = SvIVX (count_sv);
644 4019
4020 if (count > 0)
4021 {
4022 --count;
4023 SvIVX (count_sv) = count;
4024 XSRETURN_YES;
4025 }
4026 else
4027 XSRETURN_NO;
4028}
4029
4030void
4031waiters (SV *self)
4032 PPCODE:
4033{
4034 AV *av = (AV *)SvRV (self);
4035 int wcount = AvFILLp (av) + 1 - 1;
4036
4037 if (GIMME_V == G_SCALAR)
4038 XPUSHs (sv_2mortal (newSViv (wcount)));
4039 else
4040 {
4041 int i;
4042 EXTEND (SP, wcount);
4043 for (i = 1; i <= wcount; ++i)
4044 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4045 }
4046}
4047
4048MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4049
4050void
4051_may_delete (SV *sem, int count, int extra_refs)
4052 PPCODE:
4053{
4054 AV *av = (AV *)SvRV (sem);
4055
4056 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4057 && AvFILLp (av) == 0 /* no waiters, just count */
4058 && SvIV (AvARRAY (av)[0]) == count)
4059 XSRETURN_YES;
4060
4061 XSRETURN_NO;
4062}
4063
4064MODULE = Coro::State PACKAGE = Coro::Signal
4065
4066SV *
4067new (SV *klass)
4068 CODE:
4069 RETVAL = sv_bless (
4070 coro_waitarray_new (aTHX_ 0),
4071 GvSTASH (CvGV (cv))
4072 );
4073 OUTPUT:
4074 RETVAL
4075
4076void
4077wait (...)
4078 CODE:
4079 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4080
4081void
4082broadcast (SV *self)
4083 CODE:
4084{
4085 AV *av = (AV *)SvRV (self);
4086 coro_signal_wake (aTHX_ av, AvFILLp (av));
4087}
4088
4089void
4090send (SV *self)
4091 CODE:
4092{
4093 AV *av = (AV *)SvRV (self);
4094
4095 if (AvFILLp (av))
4096 coro_signal_wake (aTHX_ av, 1);
4097 else
4098 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4099}
4100
4101IV
4102awaited (SV *self)
4103 CODE:
4104 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4105 OUTPUT:
4106 RETVAL
4107
4108
4109MODULE = Coro::State PACKAGE = Coro::AnyEvent
4110
4111BOOT:
4112 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4113
4114void
4115_schedule (...)
4116 CODE:
4117{
4118 static int incede;
4119
4120 api_cede_notself (aTHX);
4121
4122 ++incede;
4123 while (coro_nready >= incede && api_cede (aTHX))
4124 ;
4125
4126 sv_setsv (sv_activity, &PL_sv_undef);
4127 if (coro_nready >= incede)
4128 {
4129 PUSHMARK (SP);
4130 PUTBACK;
4131 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4132 }
4133
4134 --incede;
4135}
4136
4137
4138MODULE = Coro::State PACKAGE = Coro::AIO
4139
4140void
4141_register (char *target, char *proto, SV *req)
4142 CODE:
4143{
4144 SV *req_cv = s_get_cv_croak (req);
4145 /* newXSproto doesn't return the CV on 5.8 */
4146 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4147 sv_setpv ((SV *)slf_cv, proto);
4148 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4149}
4150
4151MODULE = Coro::State PACKAGE = Coro::Select
4152
4153void
4154patch_pp_sselect ()
4155 CODE:
4156 if (!coro_old_pp_sselect)
4157 {
4158 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4159 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4160 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4161 }
4162
4163void
4164unpatch_pp_sselect ()
4165 CODE:
4166 if (coro_old_pp_sselect)
4167 {
4168 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4169 coro_old_pp_sselect = 0;
4170 }
4171

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