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Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.434 by root, Sat Nov 2 19:48:50 2013 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 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if USE_VALGRIND 18#define ECB_NO_THREADS 1
10# include <valgrind/valgrind.h> 19#include "ecb.h"
11#endif
12 20
13#define PERL_VERSION_ATLEAST(a,b,c) \ 21#include <stddef.h>
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
40#include <stdio.h> 22#include <stdio.h>
41#include <errno.h> 23#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h> 24#include <assert.h>
53# include <sys/mman.h> 25
54# ifndef MAP_ANONYMOUS 26#ifndef SVs_PADSTALE
55# ifdef MAP_ANON 27# define SVs_PADSTALE 0
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
60# endif 38# endif
61# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
62# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
63# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
65static long pagesize; 43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
66# else 53#else
67# define BOOT_PAGESIZE (void)0 54# include <inttypes.h> /* most portable stdint.h */
55#endif
56
57/* the maximum number of idle cctx that will be pooled */
58static int cctx_max_idle = 4;
59
60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
61# define HAS_SCOPESTACK_NAME 1
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
83
84#ifdef USE_ITHREADS
85# if CORO_PTHREAD
86static void *coro_thx;
68# endif 87# endif
69#else 88#endif
70# define PAGESIZE 0 89
71# define BOOT_PAGESIZE (void)0 90#ifdef __linux
91# include <time.h> /* for timespec */
92# include <syscall.h> /* for SYS_* */
93# ifdef SYS_clock_gettime
94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
95# define CORO_CLOCK_MONOTONIC 1
96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
72#endif 97# endif
73
74/* The next macro should declare a variable stacklevel that contains and approximation
75 * to the current C stack pointer. Its property is that it changes with each call
76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
78#define STACKLEVEL ((void *)&stacklevel)
79
80#define IN_DESTRUCT (PL_main_cv == Nullcv)
81
82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif 98#endif
87 99
88#define NOINLINE attribute ((noinline)) 100static double (*nvtime)(); /* so why doesn't it take void? */
101static void (*u2time)(pTHX_ UV ret[2]);
89 102
90#include "CoroAPI.h" 103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
91 107
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */ 108static U32 cctx_gen;
93 109static size_t cctx_stacksize = CORO_STACKSIZE;
94#ifdef USE_ITHREADS
95static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif
102
103static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
112static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
125
126/* async_pool helper stuff */
127static SV *sv_pool_rss;
128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
107 142
108static struct coro_cctx *cctx_first; 143static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 144static int cctx_count, cctx_idle;
110 145
146enum
147{
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
111/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 157typedef struct coro_cctx
158{
113 struct coro_cctx *next; 159 struct coro_cctx *next;
114 160
115 /* the stack */ 161 /* the stack */
116 void *sptr; 162 struct coro_stack stack;
117 long ssize; /* positive == mmap, otherwise malloc */
118 163
119 /* cpu state */ 164 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
121 JMPENV *top_env; 169 JMPENV *top_env;
122 coro_context cctx; 170 coro_context cctx;
123 171
172 U32 gen;
124#if USE_VALGRIND 173#if CORO_USE_VALGRIND
125 int valgrind_id; 174 int valgrind_id;
126#endif 175#endif
176 unsigned char flags;
127} coro_cctx; 177} coro_cctx;
128 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
185enum
186{
187 CF_RUNNING = 0x0001, /* coroutine is running */
188 CF_READY = 0x0002, /* coroutine is ready */
189 CF_NEW = 0x0004, /* has never been switched to */
190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
193};
194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
204
129/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
130struct coro { 206struct coro
207{
131 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
132 coro_cctx *cctx; 209 coro_cctx *cctx;
133 210
211 /* ready queue */
212 struct coro *next_ready;
213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
216 AV *mainstack;
217 perl_slots *slot; /* basically the saved sp */
218
219 CV *startcv; /* the CV to execute */
134 /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
135 AV *args; 221 int flags; /* CF_ flags */
136 int refcnt; 222 HV *hv; /* the perl hash associated with this coro, if any */
137 223
138 /* optionally saved, might be zero */ 224 /* statistics */
139 AV *defav; 225 int usecount; /* number of transfers to this coro */
140 SV *defsv;
141 SV *errsv;
142
143#define VAR(name,type) type name;
144# include "state.h"
145#undef VAR
146 226
147 /* coro process data */ 227 /* coro process data */
148 int prio; 228 int prio;
229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
233
234 /* async_pool */
235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
248
249 /* linked list */
250 struct coro *next, *prev;
149}; 251};
150 252
151typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
152typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
153 255
256/* the following variables are effectively part of the perl context */
257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
261/** Coro ********************************************************************/
262
263#define CORO_PRIO_MAX 3
264#define CORO_PRIO_HIGH 1
265#define CORO_PRIO_NORMAL 0
266#define CORO_PRIO_LOW -1
267#define CORO_PRIO_IDLE -3
268#define CORO_PRIO_MIN -4
269
270/* for Coro.pm */
271static SV *coro_current;
272static SV *coro_readyhook;
273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if ECB_AMD64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
154static AV * 307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
372
373/** lowlevel stuff **********************************************************/
374
375static SV * ecb_noinline
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV * ecb_noinline
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV * ecb_noinline
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405ecb_inline void
406coro_times_update (void)
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428ecb_inline void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440ecb_inline void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
155coro_clone_padlist (CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
156{ 512{
157 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
158 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET off = PadlistMAX (padlist) + 1;
159 517
160 newpadlist = newAV (); 518#if NEWPADAPI
519
520 while (!PadlistARRAY (padlist)[off - 1])
521 --off;
522
523 Perl_pad_push (aTHX_ padlist, off);
524 newpad = PadlistARRAY (padlist)[off];
525 PadlistARRAY (padlist)[off] = 0;
526
527#else
528
529#if PERL_VERSION_ATLEAST (5,10,0)
530 Perl_pad_push (aTHX_ padlist, off);
531#else
532 Perl_pad_push (aTHX_ padlist, off, 1);
533#endif
534
535 newpad = PadlistARRAY (padlist)[off];
536 PadlistMAX (padlist) = off - 1;
537
538#endif
539
540 newPADLIST (newpadlist);
541#if !PERL_VERSION_ATLEAST(5,15,3)
542 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
161 AvREAL_off (newpadlist); 543 AvREAL_off (newpadlist);
162#if PERL_VERSION_ATLEAST (5,9,0) 544#endif
163 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 545
546 /* Already extended to 2 elements by newPADLIST. */
547 PadlistMAX (newpadlist) = 1;
548 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
549 PadlistARRAY (newpadlist)[1] = newpad;
550
551 return newpadlist;
552}
553
554ecb_inline void
555free_padlist (pTHX_ PADLIST *padlist)
556{
557 /* may be during global destruction */
558 if (!IN_DESTRUCT)
559 {
560 I32 i = PadlistMAX (padlist);
561
562 while (i > 0) /* special-case index 0 */
563 {
564 /* we try to be extra-careful here */
565 PAD *pad = PadlistARRAY (padlist)[i--];
566 I32 j = PadMAX (pad);
567
568 while (j >= 0)
569 SvREFCNT_dec (PadARRAY (pad)[j--]);
570
571 PadMAX (pad) = -1;
572 SvREFCNT_dec (pad);
573 }
574
575 SvREFCNT_dec (PadlistNAMES (padlist));
576
577#if NEWPADAPI
578 Safefree (PadlistARRAY (padlist));
579 Safefree (padlist);
164#else 580#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#endif
167 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
168 --AvFILLp (padlist);
169
170 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *)newpad);
172
173 return newpadlist;
174}
175
176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
181 {
182 I32 i = AvFILLp (padlist); 581 AvFILLp (padlist) = -1;
183 while (i >= 0) 582 AvREAL_off (padlist);
184 {
185 SV **svp = av_fetch (padlist, i--, FALSE);
186 if (svp)
187 {
188 SV *sv;
189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
190 SvREFCNT_dec (sv);
191
192 SvREFCNT_dec (*svp);
193 }
194 }
195
196 SvREFCNT_dec ((SV*)padlist); 583 SvREFCNT_dec ((SV*)padlist);
584#endif
197 } 585 }
198} 586}
199 587
200static int 588static int
201coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 589coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
202{ 590{
203 AV *padlist; 591 PADLIST *padlist;
204 AV *av = (AV *)mg->mg_obj; 592 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
593 size_t len = *(size_t *)mg->mg_ptr;
205 594
206 /* casting is fun. */ 595 /* perl manages to free our internal AV and _then_ call us */
207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 596 if (IN_DESTRUCT)
597 return 0;
598
599 while (len--)
208 free_padlist (padlist); 600 free_padlist (aTHX_ padlists[len]);
209
210 SvREFCNT_dec (av);
211 601
212 return 0; 602 return 0;
213} 603}
214 604
215#define PERL_MAGIC_coro PERL_MAGIC_ext 605static MGVTBL coro_cv_vtbl = {
216 606 0, 0, 0, 0,
217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 607 coro_cv_free
218 608};
219#define CORO_MAGIC(cv) \
220 SvMAGIC (cv) \
221 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
222 ? SvMAGIC (cv) \
223 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
224 : 0
225 609
226/* the next two functions merely cache the padlists */ 610/* the next two functions merely cache the padlists */
227static void 611ecb_inline void
228get_padlist (CV *cv) 612get_padlist (pTHX_ CV *cv)
229{ 613{
230 MAGIC *mg = CORO_MAGIC (cv); 614 MAGIC *mg = CORO_MAGIC_cv (cv);
231 AV *av; 615 size_t *lenp;
232 616
233 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 617 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
234 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 618 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
235 else 619 else
236 { 620 {
237#if 0 621#if CORO_PREFER_PERL_FUNCTIONS
238 /* this is probably cleaner, but also slower? */ 622 /* this is probably cleaner? but also slower! */
623 /* in practise, it seems to be less stable */
239 CV *cp = Perl_cv_clone (cv); 624 CV *cp = Perl_cv_clone (aTHX_ cv);
240 CvPADLIST (cv) = CvPADLIST (cp); 625 CvPADLIST (cv) = CvPADLIST (cp);
241 CvPADLIST (cp) = 0; 626 CvPADLIST (cp) = 0;
242 SvREFCNT_dec (cp); 627 SvREFCNT_dec (cp);
243#else 628#else
244 CvPADLIST (cv) = coro_clone_padlist (cv); 629 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
245#endif 630#endif
246 } 631 }
247} 632}
248 633
249static void 634ecb_inline void
250put_padlist (CV *cv) 635put_padlist (pTHX_ CV *cv)
251{ 636{
252 MAGIC *mg = CORO_MAGIC (cv); 637 MAGIC *mg = CORO_MAGIC_cv (cv);
253 AV *av;
254 638
255 if (!mg) 639 if (ecb_expect_false (!mg))
256 {
257 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259 mg->mg_virtual = &vtbl_coro;
260 mg->mg_obj = (SV *)newAV ();
261 } 640 {
641 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
642 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
643 mg->mg_len = 1; /* so mg_free frees mg_ptr */
644 }
645 else
646 Renew (mg->mg_ptr,
647 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
648 char);
262 649
263 av = (AV *)mg->mg_obj; 650 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
264
265 if (AvFILLp (av) >= AvMAX (av))
266 av_extend (av, AvMAX (av) + 1);
267
268 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269} 651}
270 652
271#define SB do { 653/** load & save, init *******************************************************/
272#define SE } while (0)
273 654
274#define LOAD(state) load_state((state)); 655ecb_inline void
275#define SAVE(state,flags) save_state((state),(flags)); 656swap_sv (SV *a, SV *b)
657{
658 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
659 SV tmp;
276 660
277#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 661 /* swap sv_any */
662 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
278 663
664 /* swap sv_flags */
665 SvFLAGS (&tmp) = SvFLAGS (a);
666 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
667 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
668
669#if PERL_VERSION_ATLEAST (5,10,0)
670 /* perl 5.10 and later complicates this _quite_ a bit, but it also
671 * is much faster, so no quarrels here. alternatively, we could
672 * sv_upgrade to avoid this.
673 */
674 {
675 /* swap sv_u */
676 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
677
678 /* if SvANY points to the head, we need to adjust the pointers,
679 * as the pointer for a still points to b, and maybe vice versa.
680 */
681 #define svany_in_head(type) \
682 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
683
684 if (svany_in_head (SvTYPE (a)))
685 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
686
687 if (svany_in_head (SvTYPE (b)))
688 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
689 }
690#endif
691}
692
693/* swap sv heads, at least logically */
279static void 694static void
695swap_svs (pTHX_ Coro__State c)
696{
697 int i;
698
699 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
700 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
701}
702
703#define SWAP_SVS(coro) \
704 if (ecb_expect_false ((coro)->swap_sv)) \
705 swap_svs (aTHX_ (coro))
706
707static void
708on_enterleave_call (pTHX_ SV *cb);
709
710static void
280load_state(Coro__State c) 711load_perl (pTHX_ Coro__State c)
281{ 712{
282#define VAR(name,type) PL_ ## name = c->name; 713 perl_slots *slot = c->slot;
714 c->slot = 0;
715
716 PL_mainstack = c->mainstack;
717
718#if CORO_JIT
719 load_perl_slots (slot);
720#else
721 #define VARx(name,expr,type) expr = slot->name;
283# include "state.h" 722 #include "state.h"
284#undef VAR 723#endif
285
286 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
289 724
290 { 725 {
291 dSP; 726 dSP;
727
292 CV *cv; 728 CV *cv;
293 729
294 /* now do the ugly restore mess */ 730 /* now do the ugly restore mess */
295 while ((cv = (CV *)POPs)) 731 while (ecb_expect_true (cv = (CV *)POPs))
296 { 732 {
297 put_padlist (cv); /* mark this padlist as available */ 733 put_padlist (aTHX_ cv); /* mark this padlist as available */
298 CvDEPTH (cv) = PTR2IV (POPs); 734 CvDEPTH (cv) = PTR2IV (POPs);
299 CvPADLIST (cv) = (AV *)POPs; 735 CvPADLIST (cv) = (PADLIST *)POPs;
300 } 736 }
301 737
302 PUTBACK; 738 PUTBACK;
303 } 739 }
304}
305 740
741 slf_frame = c->slf_frame;
742 CORO_THROW = c->except;
743
744 if (ecb_expect_false (enable_times))
745 {
746 if (ecb_expect_false (!times_valid))
747 coro_times_update ();
748
749 coro_times_sub (c);
750 }
751
752 if (ecb_expect_false (c->on_enter))
753 {
754 int i;
755
756 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
757 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
758 }
759
760 SWAP_SVS (c);
761}
762
306static void 763static void
307save_state(Coro__State c, int flags) 764save_perl (pTHX_ Coro__State c)
308{ 765{
766 SWAP_SVS (c);
767
768 if (ecb_expect_false (c->on_leave))
769 {
770 int i;
771
772 for (i = AvFILLp (c->on_leave); i >= 0; --i)
773 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
774 }
775
776 times_valid = 0;
777
778 if (ecb_expect_false (enable_times))
779 {
780 coro_times_update (); times_valid = 1;
781 coro_times_add (c);
782 }
783
784 c->except = CORO_THROW;
785 c->slf_frame = slf_frame;
786
309 { 787 {
310 dSP; 788 dSP;
311 I32 cxix = cxstack_ix; 789 I32 cxix = cxstack_ix;
312 PERL_CONTEXT *ccstk = cxstack; 790 PERL_CONTEXT *ccstk = cxstack;
313 PERL_SI *top_si = PL_curstackinfo; 791 PERL_SI *top_si = PL_curstackinfo;
… …
315 /* 793 /*
316 * the worst thing you can imagine happens first - we have to save 794 * the worst thing you can imagine happens first - we have to save
317 * (and reinitialize) all cv's in the whole callchain :( 795 * (and reinitialize) all cv's in the whole callchain :(
318 */ 796 */
319 797
320 PUSHs (Nullsv); 798 XPUSHs (Nullsv);
321 /* this loop was inspired by pp_caller */ 799 /* this loop was inspired by pp_caller */
322 for (;;) 800 for (;;)
323 { 801 {
324 while (cxix >= 0) 802 while (ecb_expect_true (cxix >= 0))
325 { 803 {
326 PERL_CONTEXT *cx = &ccstk[cxix--]; 804 PERL_CONTEXT *cx = &ccstk[cxix--];
327 805
328 if (CxTYPE(cx) == CXt_SUB) 806 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
329 { 807 {
330 CV *cv = cx->blk_sub.cv; 808 CV *cv = cx->blk_sub.cv;
331 809
332 if (CvDEPTH (cv)) 810 if (ecb_expect_true (CvDEPTH (cv)))
333 { 811 {
334 EXTEND (SP, 3); 812 EXTEND (SP, 3);
335
336 PUSHs ((SV *)CvPADLIST(cv)); 813 PUSHs ((SV *)CvPADLIST (cv));
337 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 814 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
338 PUSHs ((SV *)cv); 815 PUSHs ((SV *)cv);
339 816
340 CvDEPTH (cv) = 0; 817 CvDEPTH (cv) = 0;
341 get_padlist (cv); 818 get_padlist (aTHX_ cv);
342 } 819 }
343 } 820 }
344#ifdef CXt_FORMAT
345 else if (CxTYPE(cx) == CXt_FORMAT)
346 {
347 /* I never used formats, so how should I know how these are implemented? */
348 /* my bold guess is as a simple, plain sub... */
349 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
350 }
351#endif
352 } 821 }
353 822
354 if (top_si->si_type == PERLSI_MAIN) 823 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
355 break; 824 break;
356 825
357 top_si = top_si->si_prev; 826 top_si = top_si->si_prev;
358 ccstk = top_si->si_cxstack; 827 ccstk = top_si->si_cxstack;
359 cxix = top_si->si_cxix; 828 cxix = top_si->si_cxix;
360 } 829 }
361 830
362 PUTBACK; 831 PUTBACK;
363 } 832 }
364 833
365 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 834 /* allocate some space on the context stack for our purposes */
366 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 835 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
367 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 836 {
837 unsigned int i;
368 838
369#define VAR(name,type)c->name = PL_ ## name; 839 for (i = 0; i < SLOT_COUNT; ++i)
840 CXINC;
841
842 cxstack_ix -= SLOT_COUNT; /* undo allocation */
843 }
844
845 c->mainstack = PL_mainstack;
846
847 {
848 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
849
850#if CORO_JIT
851 save_perl_slots (slot);
852#else
853 #define VARx(name,expr,type) slot->name = expr;
370# include "state.h" 854 #include "state.h"
371#undef VAR 855#endif
856 }
372} 857}
373 858
374/* 859/*
375 * allocate various perl stacks. This is an exact copy 860 * allocate various perl stacks. This is almost an exact copy
376 * of perl.c:init_stacks, except that it uses less memory 861 * of perl.c:init_stacks, except that it uses less memory
377 * on the (sometimes correct) assumption that coroutines do 862 * on the (sometimes correct) assumption that coroutines do
378 * not usually need a lot of stackspace. 863 * not usually need a lot of stackspace.
379 */ 864 */
865#if CORO_PREFER_PERL_FUNCTIONS
866# define coro_init_stacks(thx) init_stacks ()
867#else
380static void 868static void
381coro_init_stacks () 869coro_init_stacks (pTHX)
382{ 870{
383 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 871 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
384 PL_curstackinfo->si_type = PERLSI_MAIN; 872 PL_curstackinfo->si_type = PERLSI_MAIN;
385 PL_curstack = PL_curstackinfo->si_stack; 873 PL_curstack = PL_curstackinfo->si_stack;
386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 874 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387 875
388 PL_stack_base = AvARRAY(PL_curstack); 876 PL_stack_base = AvARRAY(PL_curstack);
389 PL_stack_sp = PL_stack_base; 877 PL_stack_sp = PL_stack_base;
390 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 878 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391 879
392 New(50,PL_tmps_stack,96,SV*); 880 New(50,PL_tmps_stack,32,SV*);
393 PL_tmps_floor = -1; 881 PL_tmps_floor = -1;
394 PL_tmps_ix = -1; 882 PL_tmps_ix = -1;
395 PL_tmps_max = 96; 883 PL_tmps_max = 32;
396 884
397 New(54,PL_markstack,16,I32); 885 New(54,PL_markstack,16,I32);
398 PL_markstack_ptr = PL_markstack; 886 PL_markstack_ptr = PL_markstack;
399 PL_markstack_max = PL_markstack + 16; 887 PL_markstack_max = PL_markstack + 16;
400 888
401#ifdef SET_MARK_OFFSET 889#ifdef SET_MARK_OFFSET
402 SET_MARK_OFFSET; 890 SET_MARK_OFFSET;
403#endif 891#endif
404 892
405 New(54,PL_scopestack,16,I32); 893 New(54,PL_scopestack,8,I32);
406 PL_scopestack_ix = 0; 894 PL_scopestack_ix = 0;
407 PL_scopestack_max = 16; 895 PL_scopestack_max = 8;
896#if HAS_SCOPESTACK_NAME
897 New(54,PL_scopestack_name,8,const char*);
898#endif
408 899
409 New(54,PL_savestack,96,ANY); 900 New(54,PL_savestack,24,ANY);
410 PL_savestack_ix = 0; 901 PL_savestack_ix = 0;
411 PL_savestack_max = 96; 902 PL_savestack_max = 24;
412 903
413#if !PERL_VERSION_ATLEAST (5,9,0) 904#if !PERL_VERSION_ATLEAST (5,10,0)
414 New(54,PL_retstack,8,OP*); 905 New(54,PL_retstack,4,OP*);
415 PL_retstack_ix = 0; 906 PL_retstack_ix = 0;
416 PL_retstack_max = 8; 907 PL_retstack_max = 4;
417#endif 908#endif
418} 909}
910#endif
419 911
420/* 912/*
421 * destroy the stacks, the callchain etc... 913 * destroy the stacks, the callchain etc...
422 */ 914 */
423static void 915static void
424coro_destroy_stacks () 916coro_destruct_stacks (pTHX)
425{ 917{
426 if (!IN_DESTRUCT)
427 {
428 /* is this ugly, I ask? */
429 LEAVE_SCOPE (0);
430
431 /* sure it is, but more important: is it correct?? :/ */
432 FREETMPS;
433
434 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
435 }
436
437 while (PL_curstackinfo->si_next) 918 while (PL_curstackinfo->si_next)
438 PL_curstackinfo = PL_curstackinfo->si_next; 919 PL_curstackinfo = PL_curstackinfo->si_next;
439 920
440 while (PL_curstackinfo) 921 while (PL_curstackinfo)
441 { 922 {
442 PERL_SI *p = PL_curstackinfo->si_prev; 923 PERL_SI *p = PL_curstackinfo->si_prev;
443 924
444 { /*D*//*remove*/
445 dSP;
446 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447 PUTBACK; /* possibly superfluous */
448 }
449
450 if (!IN_DESTRUCT) 925 if (!IN_DESTRUCT)
451 {
452 dounwind (-1);/*D*//*remove*/
453 SvREFCNT_dec (PL_curstackinfo->si_stack); 926 SvREFCNT_dec (PL_curstackinfo->si_stack);
454 }
455 927
456 Safefree (PL_curstackinfo->si_cxstack); 928 Safefree (PL_curstackinfo->si_cxstack);
457 Safefree (PL_curstackinfo); 929 Safefree (PL_curstackinfo);
458 PL_curstackinfo = p; 930 PL_curstackinfo = p;
459 } 931 }
460 932
461 Safefree (PL_tmps_stack); 933 Safefree (PL_tmps_stack);
462 Safefree (PL_markstack); 934 Safefree (PL_markstack);
463 Safefree (PL_scopestack); 935 Safefree (PL_scopestack);
936#if HAS_SCOPESTACK_NAME
937 Safefree (PL_scopestack_name);
938#endif
464 Safefree (PL_savestack); 939 Safefree (PL_savestack);
465#if !PERL_VERSION_ATLEAST (5,9,0) 940#if !PERL_VERSION_ATLEAST (5,10,0)
466 Safefree (PL_retstack); 941 Safefree (PL_retstack);
467#endif 942#endif
468} 943}
469 944
945#define CORO_RSS \
946 rss += sizeof (SYM (curstackinfo)); \
947 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
948 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
949 rss += SYM (tmps_max) * sizeof (SV *); \
950 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
951 rss += SYM (scopestack_max) * sizeof (I32); \
952 rss += SYM (savestack_max) * sizeof (ANY);
953
954static size_t
955coro_rss (pTHX_ struct coro *coro)
956{
957 size_t rss = sizeof (*coro);
958
959 if (coro->mainstack)
960 {
961 if (coro->flags & CF_RUNNING)
962 {
963 #define SYM(sym) PL_ ## sym
964 CORO_RSS;
965 #undef SYM
966 }
967 else
968 {
969 #define SYM(sym) coro->slot->sym
970 CORO_RSS;
971 #undef SYM
972 }
973 }
974
975 return rss;
976}
977
978/** coroutine stack handling ************************************************/
979
980static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
981static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
982static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
983
984/* apparently < 5.8.8 */
985#ifndef MgPV_nolen_const
986#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
987 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
988 (const char*)(mg)->mg_ptr)
989#endif
990
991/*
992 * This overrides the default magic get method of %SIG elements.
993 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
994 * and instead of trying to save and restore the hash elements (extremely slow),
995 * we just provide our own readback here.
996 */
997static int ecb_cold
998coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
999{
1000 const char *s = MgPV_nolen_const (mg);
1001
1002 if (*s == '_')
1003 {
1004 SV **svp = 0;
1005
1006 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1007 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1008
1009 if (svp)
1010 {
1011 SV *ssv;
1012
1013 if (!*svp)
1014 ssv = &PL_sv_undef;
1015 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1016 ssv = sv_2mortal (newRV_inc (*svp));
1017 else
1018 ssv = *svp;
1019
1020 sv_setsv (sv, ssv);
1021 return 0;
1022 }
1023 }
1024
1025 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1026}
1027
1028static int ecb_cold
1029coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1030{
1031 const char *s = MgPV_nolen_const (mg);
1032
1033 if (*s == '_')
1034 {
1035 SV **svp = 0;
1036
1037 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1038 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1039
1040 if (svp)
1041 {
1042 SV *old = *svp;
1043 *svp = 0;
1044 SvREFCNT_dec (old);
1045 return 0;
1046 }
1047 }
1048
1049 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1050}
1051
1052static int ecb_cold
1053coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1054{
1055 const char *s = MgPV_nolen_const (mg);
1056
1057 if (*s == '_')
1058 {
1059 SV **svp = 0;
1060
1061 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1062 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1063
1064 if (svp)
1065 {
1066 SV *old = *svp;
1067 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1068 SvREFCNT_dec (old);
1069 return 0;
1070 }
1071 }
1072
1073 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1074}
1075
1076static void
1077prepare_nop (pTHX_ struct coro_transfer_args *ta)
1078{
1079 /* kind of mega-hacky, but works */
1080 ta->next = ta->prev = (struct coro *)ta;
1081}
1082
470static void 1083static int
471setup_coro (struct coro *coro) 1084slf_check_nop (pTHX_ struct CoroSLF *frame)
1085{
1086 return 0;
1087}
1088
1089static int
1090slf_check_repeat (pTHX_ struct CoroSLF *frame)
1091{
1092 return 1;
1093}
1094
1095static UNOP init_perl_op;
1096
1097ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1098init_perl (pTHX_ struct coro *coro)
472{ 1099{
473 /* 1100 /*
474 * emulate part of the perl startup here. 1101 * emulate part of the perl startup here.
475 */ 1102 */
476
477 coro_init_stacks (); 1103 coro_init_stacks (aTHX);
478 1104
1105 PL_runops = RUNOPS_DEFAULT;
1106 PL_curcop = &PL_compiling;
1107 PL_in_eval = EVAL_NULL;
479 PL_curcop = 0; 1108 PL_comppad = 0;
480 PL_in_eval = 0; 1109 PL_comppad_name = 0;
1110 PL_comppad_name_fill = 0;
1111 PL_comppad_name_floor = 0;
481 PL_curpm = 0; 1112 PL_curpm = 0;
1113 PL_curpad = 0;
1114 PL_localizing = 0;
1115 PL_restartop = 0;
1116#if PERL_VERSION_ATLEAST (5,10,0)
1117 PL_parser = 0;
1118#endif
1119 PL_hints = 0;
1120
1121 /* recreate the die/warn hooks */
1122 PL_diehook = SvREFCNT_inc (rv_diehook);
1123 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1124
1125 GvSV (PL_defgv) = newSV (0);
1126 GvAV (PL_defgv) = coro->args; coro->args = 0;
1127 GvSV (PL_errgv) = newSV (0);
1128 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1129 GvHV (PL_hintgv) = 0;
1130 PL_rs = newSVsv (GvSV (irsgv));
1131 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
482 1132
483 { 1133 {
484 dSP; 1134 dSP;
485 LOGOP myop; 1135 UNOP myop;
486 1136
487 /* I have no idea why this is needed, but it is */ 1137 Zero (&myop, 1, UNOP);
1138 myop.op_next = Nullop;
1139 myop.op_type = OP_ENTERSUB;
1140 myop.op_flags = OPf_WANT_VOID;
1141
488 PUSHMARK (SP); 1142 PUSHMARK (SP);
489 1143 PUSHs ((SV *)coro->startcv);
490 SvREFCNT_dec (GvAV (PL_defgv)); 1144 PUTBACK;
491 GvAV (PL_defgv) = coro->args; coro->args = 0;
492
493 Zero (&myop, 1, LOGOP);
494 myop.op_next = Nullop;
495 myop.op_flags = OPf_WANT_VOID;
496
497 PL_op = (OP *)&myop; 1145 PL_op = (OP *)&myop;
498
499 PUSHMARK (SP);
500 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501 PUTBACK;
502 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1146 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503 SPAGAIN;
504
505 ENTER; /* necessary e.g. for dounwind */
506 } 1147 }
507}
508 1148
1149 /* this newly created coroutine might be run on an existing cctx which most
1150 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1151 */
1152 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1153 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1154 slf_frame.destroy = 0;
1155
1156 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1157 init_perl_op.op_next = PL_op;
1158 init_perl_op.op_type = OP_ENTERSUB;
1159 init_perl_op.op_ppaddr = pp_slf;
1160 /* no flags etc. required, as an init function won't be called */
1161
1162 PL_op = (OP *)&init_perl_op;
1163
1164 /* copy throw, in case it was set before init_perl */
1165 CORO_THROW = coro->except;
1166
1167 SWAP_SVS (coro);
1168
1169 if (ecb_expect_false (enable_times))
1170 {
1171 coro_times_update ();
1172 coro_times_sub (coro);
1173 }
1174}
1175
509static void 1176static void
1177coro_unwind_stacks (pTHX)
1178{
1179 if (!IN_DESTRUCT)
1180 {
1181 /* restore all saved variables and stuff */
1182 LEAVE_SCOPE (0);
1183 assert (PL_tmps_floor == -1);
1184
1185 /* free all temporaries */
1186 FREETMPS;
1187 assert (PL_tmps_ix == -1);
1188
1189 /* unwind all extra stacks */
1190 POPSTACK_TO (PL_mainstack);
1191
1192 /* unwind main stack */
1193 dounwind (-1);
1194 }
1195}
1196
1197static void
1198destroy_perl (pTHX_ struct coro *coro)
1199{
1200 SV *svf [9];
1201
1202 {
1203 SV *old_current = SvRV (coro_current);
1204 struct coro *current = SvSTATE (old_current);
1205
1206 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1207
1208 save_perl (aTHX_ current);
1209
1210 /* this will cause transfer_check to croak on block*/
1211 SvRV_set (coro_current, (SV *)coro->hv);
1212
1213 load_perl (aTHX_ coro);
1214
1215 coro_unwind_stacks (aTHX);
1216
1217 /* restore swapped sv's */
1218 SWAP_SVS (coro);
1219
1220 coro_destruct_stacks (aTHX);
1221
1222 /* now save some sv's to be free'd later */
1223 svf [0] = GvSV (PL_defgv);
1224 svf [1] = (SV *)GvAV (PL_defgv);
1225 svf [2] = GvSV (PL_errgv);
1226 svf [3] = (SV *)PL_defoutgv;
1227 svf [4] = PL_rs;
1228 svf [5] = GvSV (irsgv);
1229 svf [6] = (SV *)GvHV (PL_hintgv);
1230 svf [7] = PL_diehook;
1231 svf [8] = PL_warnhook;
1232 assert (9 == sizeof (svf) / sizeof (*svf));
1233
1234 SvRV_set (coro_current, old_current);
1235
1236 load_perl (aTHX_ current);
1237 }
1238
1239 {
1240 unsigned int i;
1241
1242 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1243 SvREFCNT_dec (svf [i]);
1244
1245 SvREFCNT_dec (coro->saved_deffh);
1246 SvREFCNT_dec (coro->rouse_cb);
1247 SvREFCNT_dec (coro->invoke_cb);
1248 SvREFCNT_dec (coro->invoke_av);
1249 }
1250}
1251
1252ecb_inline void
510free_coro_mortal () 1253free_coro_mortal (pTHX)
511{ 1254{
512 if (coro_mortal) 1255 if (ecb_expect_true (coro_mortal))
513 { 1256 {
514 SvREFCNT_dec (coro_mortal); 1257 SvREFCNT_dec ((SV *)coro_mortal);
515 coro_mortal = 0; 1258 coro_mortal = 0;
516 } 1259 }
517} 1260}
518 1261
519static void NOINLINE
520prepare_cctx (coro_cctx *cctx)
521{
522 dSP;
523 LOGOP myop;
524
525 Zero (&myop, 1, LOGOP);
526 myop.op_next = PL_op;
527 myop.op_flags = OPf_WANT_VOID;
528
529 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530
531 PUSHMARK (SP);
532 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533 PUTBACK;
534 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
535 SPAGAIN;
536}
537
538static void 1262static int
539coro_run (void *arg) 1263runops_trace (pTHX)
540{ 1264{
541 /* coro_run is the alternative epilogue of transfer() */ 1265 COP *oldcop = 0;
542 UNLOCK; 1266 int oldcxix = -2;
543 1267
544 /* 1268 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
545 * this is a _very_ stripped down perl interpreter ;) 1269 {
546 */ 1270 PERL_ASYNC_CHECK ();
1271
1272 if (cctx_current->flags & CC_TRACE_ALL)
1273 {
1274 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1275 {
1276 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1277 SV **bot, **top;
1278 AV *av = newAV (); /* return values */
1279 SV **cb;
1280 dSP;
1281
1282 GV *gv = CvGV (cx->blk_sub.cv);
1283 SV *fullname = sv_2mortal (newSV (0));
1284 if (isGV (gv))
1285 gv_efullname3 (fullname, gv, 0);
1286
1287 bot = PL_stack_base + cx->blk_oldsp + 1;
1288 top = cx->blk_gimme == G_ARRAY ? SP + 1
1289 : cx->blk_gimme == G_SCALAR ? bot + 1
1290 : bot;
1291
1292 av_extend (av, top - bot);
1293 while (bot < top)
1294 av_push (av, SvREFCNT_inc_NN (*bot++));
1295
1296 PL_runops = RUNOPS_DEFAULT;
1297 ENTER;
1298 SAVETMPS;
1299 EXTEND (SP, 3);
1300 PUSHMARK (SP);
1301 PUSHs (&PL_sv_no);
1302 PUSHs (fullname);
1303 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1304 PUTBACK;
1305 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1306 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1307 SPAGAIN;
1308 FREETMPS;
1309 LEAVE;
1310 PL_runops = runops_trace;
1311 }
1312
1313 if (oldcop != PL_curcop)
1314 {
1315 oldcop = PL_curcop;
1316
1317 if (PL_curcop != &PL_compiling)
1318 {
1319 SV **cb;
1320
1321 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1322 {
1323 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1324
1325 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1326 {
1327 dSP;
1328 GV *gv = CvGV (cx->blk_sub.cv);
1329 SV *fullname = sv_2mortal (newSV (0));
1330
1331 if (isGV (gv))
1332 gv_efullname3 (fullname, gv, 0);
1333
1334 PL_runops = RUNOPS_DEFAULT;
1335 ENTER;
1336 SAVETMPS;
1337 EXTEND (SP, 3);
1338 PUSHMARK (SP);
1339 PUSHs (&PL_sv_yes);
1340 PUSHs (fullname);
1341 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1342 PUTBACK;
1343 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1344 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1345 SPAGAIN;
1346 FREETMPS;
1347 LEAVE;
1348 PL_runops = runops_trace;
1349 }
1350
1351 oldcxix = cxstack_ix;
1352 }
1353
1354 if (cctx_current->flags & CC_TRACE_LINE)
1355 {
1356 dSP;
1357
1358 PL_runops = RUNOPS_DEFAULT;
1359 ENTER;
1360 SAVETMPS;
1361 EXTEND (SP, 3);
1362 PL_runops = RUNOPS_DEFAULT;
1363 PUSHMARK (SP);
1364 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1365 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1366 PUTBACK;
1367 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1368 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1369 SPAGAIN;
1370 FREETMPS;
1371 LEAVE;
1372 PL_runops = runops_trace;
1373 }
1374 }
1375 }
1376 }
1377 }
1378
1379 TAINT_NOT;
1380 return 0;
1381}
1382
1383static struct CoroSLF cctx_ssl_frame;
1384
1385static void
1386slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1387{
1388 ta->prev = 0;
1389}
1390
1391static int
1392slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1393{
1394 *frame = cctx_ssl_frame;
1395
1396 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1397}
1398
1399/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1400static void ecb_noinline
1401cctx_prepare (pTHX)
1402{
547 PL_top_env = &PL_start_env; 1403 PL_top_env = &PL_start_env;
548 1404
1405 if (cctx_current->flags & CC_TRACE)
1406 PL_runops = runops_trace;
1407
1408 /* we already must be executing an SLF op, there is no other valid way
1409 * that can lead to creation of a new cctx */
1410 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1411 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1412
1413 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1414 cctx_ssl_frame = slf_frame;
1415
1416 slf_frame.prepare = slf_prepare_set_stacklevel;
1417 slf_frame.check = slf_check_set_stacklevel;
1418}
1419
1420/* the tail of transfer: execute stuff we can only do after a transfer */
1421ecb_inline void
1422transfer_tail (pTHX)
1423{
1424 free_coro_mortal (aTHX);
1425}
1426
1427/* try to exit the same way perl's main function would do */
1428/* we do not bother resetting the environment or other things *7
1429/* that are not, uhm, essential */
1430/* this obviously also doesn't work when perl is embedded */
1431static void ecb_noinline ecb_cold
1432perlish_exit (pTHX)
1433{
1434 int exitstatus = perl_destruct (PL_curinterp);
1435 perl_free (PL_curinterp);
1436 exit (exitstatus);
1437}
1438
1439/*
1440 * this is a _very_ stripped down perl interpreter ;)
1441 */
1442static void
1443cctx_run (void *arg)
1444{
1445#ifdef USE_ITHREADS
1446# if CORO_PTHREAD
1447 PERL_SET_CONTEXT (coro_thx);
1448# endif
1449#endif
1450 {
1451 dTHX;
1452
1453 /* normally we would need to skip the entersub here */
1454 /* not doing so will re-execute it, which is exactly what we want */
1455 /* PL_nop = PL_nop->op_next */
1456
549 /* inject call to cctx_init */ 1457 /* inject a fake subroutine call to cctx_init */
550 prepare_cctx ((coro_cctx *)arg); 1458 cctx_prepare (aTHX);
551 1459
1460 /* cctx_run is the alternative tail of transfer() */
1461 transfer_tail (aTHX);
1462
552 /* somebody will hit me for both perl_run and PL_restartop */ 1463 /* somebody or something will hit me for both perl_run and PL_restartop */
1464 PL_restartop = PL_op;
553 perl_run (PL_curinterp); 1465 perl_run (PL_curinterp);
1466 /*
1467 * Unfortunately, there is no way to get at the return values of the
1468 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1469 * runtime errors here, as this is just a random interpreter, not a thread.
1470 */
554 1471
555 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1472 /*
556 abort (); 1473 * If perl-run returns we assume exit() was being called or the coro
1474 * fell off the end, which seems to be the only valid (non-bug)
1475 * reason for perl_run to return. We try to mimic whatever perl is normally
1476 * doing in that case. YMMV.
1477 */
1478 perlish_exit (aTHX);
1479 }
557} 1480}
558 1481
559static coro_cctx * 1482static coro_cctx *
560cctx_new () 1483cctx_new (void)
561{ 1484{
562 coro_cctx *cctx; 1485 coro_cctx *cctx;
563 1486
564 ++cctx_count; 1487 ++cctx_count;
565
566 New (0, cctx, 1, coro_cctx); 1488 New (0, cctx, 1, coro_cctx);
567 1489
568#if HAVE_MMAP 1490 cctx->gen = cctx_gen;
1491 cctx->flags = 0;
1492 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
569 1493
570 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1494 return cctx;
571 /* mmap suppsedly does allocate-on-write for us */ 1495}
572 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573 1496
574 if (cctx->sptr == (void *)-1) 1497/* create a new cctx only suitable as source */
1498static coro_cctx *
1499cctx_new_empty (void)
1500{
1501 coro_cctx *cctx = cctx_new ();
1502
1503 cctx->stack.sptr = 0;
1504 coro_create (&cctx->cctx, 0, 0, 0, 0);
1505
1506 return cctx;
1507}
1508
1509/* create a new cctx suitable as destination/running a perl interpreter */
1510static coro_cctx *
1511cctx_new_run (void)
1512{
1513 coro_cctx *cctx = cctx_new ();
1514
1515 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
575 { 1516 {
576 perror ("FATAL: unable to mmap stack for coroutine"); 1517 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
577 _exit (EXIT_FAILURE); 1518 _exit (EXIT_FAILURE);
578 } 1519 }
579 1520
580# if STACKGUARD
581 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
582# endif
583
584#else
585
586 cctx->ssize = STACKSIZE * (long)sizeof (long);
587 New (0, cctx->sptr, STACKSIZE, long);
588
589 if (!cctx->sptr)
590 {
591 perror ("FATAL: unable to malloc stack for coroutine");
592 _exit (EXIT_FAILURE);
593 }
594
595#endif
596
597#if USE_VALGRIND
598 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600 cctx->ssize + (char *)cctx->sptr
601 );
602#endif
603
604 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1521 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
605 1522
606 return cctx; 1523 return cctx;
607} 1524}
608 1525
609static void 1526static void
610cctx_free (coro_cctx *cctx) 1527cctx_destroy (coro_cctx *cctx)
611{ 1528{
612 if (!cctx) 1529 if (!cctx)
613 return; 1530 return;
614 1531
1532 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1533
615 --cctx_count; 1534 --cctx_count;
1535 coro_destroy (&cctx->cctx);
616 1536
617#if USE_VALGRIND 1537 coro_stack_free (&cctx->stack);
618 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619#endif
620
621#if HAVE_MMAP
622 munmap (cctx->sptr, cctx->ssize);
623#else
624 Safefree (cctx->sptr);
625#endif
626 1538
627 Safefree (cctx); 1539 Safefree (cctx);
628} 1540}
629 1541
1542/* wether this cctx should be destructed */
1543#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1544
630static coro_cctx * 1545static coro_cctx *
631cctx_get () 1546cctx_get (pTHX)
632{ 1547{
633 coro_cctx *cctx; 1548 while (ecb_expect_true (cctx_first))
634
635 if (cctx_first)
636 { 1549 {
1550 coro_cctx *cctx = cctx_first;
1551 cctx_first = cctx->next;
637 --cctx_idle; 1552 --cctx_idle;
638 cctx = cctx_first; 1553
639 cctx_first = cctx->next; 1554 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
640 } 1555 return cctx;
641 else 1556
642 { 1557 cctx_destroy (cctx);
643 cctx = cctx_new ();
644 PL_op = PL_op->op_next;
645 } 1558 }
646 1559
647 return cctx; 1560 return cctx_new_run ();
648} 1561}
649 1562
650static void 1563static void
651cctx_put (coro_cctx *cctx) 1564cctx_put (coro_cctx *cctx)
652{ 1565{
1566 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1567
1568 /* free another cctx if overlimit */
1569 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1570 {
1571 coro_cctx *first = cctx_first;
1572 cctx_first = first->next;
1573 --cctx_idle;
1574
1575 cctx_destroy (first);
1576 }
1577
653 ++cctx_idle; 1578 ++cctx_idle;
654 cctx->next = cctx_first; 1579 cctx->next = cctx_first;
655 cctx_first = cctx; 1580 cctx_first = cctx;
656} 1581}
657 1582
658/* never call directly, always through the coro_state_transfer global variable */ 1583/** coroutine switching *****************************************************/
659static void NOINLINE 1584
1585static void
1586transfer_check (pTHX_ struct coro *prev, struct coro *next)
1587{
1588 /* TODO: throwing up here is considered harmful */
1589
1590 if (ecb_expect_true (prev != next))
1591 {
1592 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1593 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1594
1595 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1596 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1597
1598#if !PERL_VERSION_ATLEAST (5,10,0)
1599 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1600 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1601#endif
1602 }
1603}
1604
1605/* always use the TRANSFER macro */
1606static void ecb_noinline /* noinline so we have a fixed stackframe */
660transfer (struct coro *prev, struct coro *next, int flags) 1607transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
661{ 1608{
662 dSTACKLEVEL; 1609 dSTACKLEVEL;
663 1610
664 /* sometimes transfer is only called to set idle_sp */ 1611 /* sometimes transfer is only called to set idle_sp */
665 if (flags == TRANSFER_SET_STACKLEVEL) 1612 if (ecb_expect_false (!prev))
1613 {
666 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1614 cctx_current->idle_sp = STACKLEVEL;
667 else if (prev != next) 1615 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
668 { 1616 }
1617 else if (ecb_expect_true (prev != next))
1618 {
669 coro_cctx *prev__cctx; 1619 coro_cctx *cctx_prev;
670 1620
671 LOCK; 1621 if (ecb_expect_false (prev->flags & CF_NEW))
672
673 if (next->mainstack)
674 { 1622 {
675 /* coroutine already started */ 1623 /* create a new empty/source context */
676 SAVE (prev, flags); 1624 prev->flags &= ~CF_NEW;
677 LOAD (next); 1625 prev->flags |= CF_RUNNING;
1626 }
1627
1628 prev->flags &= ~CF_RUNNING;
1629 next->flags |= CF_RUNNING;
1630
1631 /* first get rid of the old state */
1632 save_perl (aTHX_ prev);
1633
1634 if (ecb_expect_false (next->flags & CF_NEW))
1635 {
1636 /* need to start coroutine */
1637 next->flags &= ~CF_NEW;
1638 /* setup coroutine call */
1639 init_perl (aTHX_ next);
678 } 1640 }
679 else 1641 else
1642 load_perl (aTHX_ next);
1643
1644 /* possibly untie and reuse the cctx */
1645 if (ecb_expect_true (
1646 cctx_current->idle_sp == STACKLEVEL
1647 && !(cctx_current->flags & CC_TRACE)
1648 && !force_cctx
1649 ))
680 { 1650 {
681 /* need to start coroutine */ 1651 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
682 /* first get rid of the old state */ 1652 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
683 SAVE (prev, -1); 1653
684 /* setup coroutine call */ 1654 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
685 setup_coro (next); 1655 /* without this the next cctx_get might destroy the running cctx while still in use */
686 /* need a stack */ 1656 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
687 next->cctx = 0; 1657 if (ecb_expect_true (!next->cctx))
1658 next->cctx = cctx_get (aTHX);
1659
1660 cctx_put (cctx_current);
688 } 1661 }
1662 else
1663 prev->cctx = cctx_current;
689 1664
690 if (!prev->cctx) 1665 ++next->usecount;
691 /* create a new empty context */
692 Newz (0, prev->cctx, 1, coro_cctx);
693 1666
694 prev__cctx = prev->cctx; 1667 cctx_prev = cctx_current;
1668 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
695 1669
696 /* possibly "free" the cctx */ 1670 next->cctx = 0;
697 if (prev__cctx->idle_sp == STACKLEVEL) 1671
1672 if (ecb_expect_false (cctx_prev != cctx_current))
698 { 1673 {
699 assert (PL_top_env == prev__cctx->top_env);//D 1674 cctx_prev->top_env = PL_top_env;
700 cctx_put (prev__cctx); 1675 PL_top_env = cctx_current->top_env;
701 prev->cctx = 0; 1676 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
702 } 1677 }
703 1678
704 if (!next->cctx) 1679 transfer_tail (aTHX);
705 next->cctx = cctx_get ();
706
707 if (prev__cctx != next->cctx)
708 {
709 prev__cctx->top_env = PL_top_env;
710 PL_top_env = next->cctx->top_env;
711 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712 }
713
714 free_coro_mortal ();
715
716 UNLOCK;
717 } 1680 }
718} 1681}
719 1682
720struct transfer_args 1683#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
721{
722 struct coro *prev, *next;
723 int flags;
724};
725
726#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1684#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
727 1685
1686/** high level stuff ********************************************************/
1687
1688/* this function is actually Coro, not Coro::State, but we call it from here */
1689/* because it is convenient - but it hasn't been declared yet for that reason */
728static void 1690static void
1691coro_call_on_destroy (pTHX_ struct coro *coro);
1692
1693static void
729coro_state_destroy (struct coro *coro) 1694coro_state_destroy (pTHX_ struct coro *coro)
730{ 1695{
731 if (coro->refcnt--) 1696 if (coro->flags & CF_ZOMBIE)
732 return; 1697 return;
733 1698
734 if (coro->mainstack && coro->mainstack != main_mainstack) 1699 slf_destroy (aTHX_ coro);
735 {
736 struct coro temp;
737 1700
738 SAVE ((&temp), TRANSFER_SAVE_ALL); 1701 coro->flags |= CF_ZOMBIE;
739 LOAD (coro);
740 1702
741 coro_destroy_stacks (); 1703 if (coro->flags & CF_READY)
742
743 LOAD ((&temp)); /* this will get rid of defsv etc.. */
744
745 coro->mainstack = 0;
746 } 1704 {
1705 /* reduce nready, as destroying a ready coro effectively unreadies it */
1706 /* alternative: look through all ready queues and remove the coro */
1707 --coro_nready;
1708 }
1709 else
1710 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
747 1711
1712 if (coro->next) coro->next->prev = coro->prev;
1713 if (coro->prev) coro->prev->next = coro->next;
1714 if (coro == coro_first) coro_first = coro->next;
1715
1716 if (coro->mainstack
1717 && coro->mainstack != main_mainstack
1718 && coro->slot
1719 && !PL_dirty)
1720 destroy_perl (aTHX_ coro);
1721
748 cctx_free (coro->cctx); 1722 cctx_destroy (coro->cctx);
1723 SvREFCNT_dec (coro->startcv);
749 SvREFCNT_dec (coro->args); 1724 SvREFCNT_dec (coro->args);
750 Safefree (coro); 1725 SvREFCNT_dec (coro->swap_sv);
1726 SvREFCNT_dec (CORO_THROW);
1727
1728 coro_call_on_destroy (aTHX_ coro);
1729
1730 /* more destruction mayhem in coro_state_free */
751} 1731}
752 1732
753static int 1733static int
754coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1734coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755{ 1735{
756 struct coro *coro = (struct coro *)mg->mg_ptr; 1736 struct coro *coro = (struct coro *)mg->mg_ptr;
757 mg->mg_ptr = 0; 1737 mg->mg_ptr = 0;
758 1738
759 coro_state_destroy (coro); 1739 coro_state_destroy (aTHX_ coro);
1740 SvREFCNT_dec (coro->on_destroy);
1741 SvREFCNT_dec (coro->status);
1742
1743 Safefree (coro);
760 1744
761 return 0; 1745 return 0;
762} 1746}
763 1747
764static int 1748static int ecb_cold
765coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1749coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766{ 1750{
767 struct coro *coro = (struct coro *)mg->mg_ptr; 1751 /* called when perl clones the current process the slow way (windows process emulation) */
768 1752 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
769 ++coro->refcnt; 1753 mg->mg_ptr = 0;
1754 mg->mg_virtual = 0;
770 1755
771 return 0; 1756 return 0;
772} 1757}
773 1758
774static MGVTBL coro_state_vtbl = { 1759static MGVTBL coro_state_vtbl = {
775 0, 0, 0, 0, 1760 0, 0, 0, 0,
776 coro_state_clear, 1761 coro_state_free,
777 0, 1762 0,
778#ifdef MGf_DUP 1763#ifdef MGf_DUP
779 coro_state_dup, 1764 coro_state_dup,
780#else 1765#else
781# define MGf_DUP 0 1766# define MGf_DUP 0
782#endif 1767#endif
783}; 1768};
784 1769
785static struct coro *
786SvSTATE (SV *coro)
787{
788 HV *stash;
789 MAGIC *mg;
790
791 if (SvROK (coro))
792 coro = SvRV (coro);
793
794 stash = SvSTASH (coro);
795 if (stash != coro_stash && stash != coro_state_stash)
796 {
797 /* very slow, but rare, check */
798 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799 croak ("Coro::State object required");
800 }
801
802 mg = SvMAGIC (coro);
803 assert (mg->mg_type == PERL_MAGIC_ext);
804 return (struct coro *)mg->mg_ptr;
805}
806
807static void 1770static void
808prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1771prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
809{ 1772{
810 ta->prev = SvSTATE (prev); 1773 ta->prev = SvSTATE (prev_sv);
811 ta->next = SvSTATE (next); 1774 ta->next = SvSTATE (next_sv);
812 ta->flags = flags; 1775 TRANSFER_CHECK (*ta);
813} 1776}
814 1777
815static void 1778static void
816api_transfer (SV *prev, SV *next, int flags) 1779api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1780{
1781 struct coro_transfer_args ta;
1782
1783 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1784 TRANSFER (ta, 1);
1785}
1786
1787/** Coro ********************************************************************/
1788
1789ecb_inline void
1790coro_enq (pTHX_ struct coro *coro)
1791{
1792 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1793
1794 SvREFCNT_inc_NN (coro->hv);
1795
1796 coro->next_ready = 0;
1797 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1798 ready [1] = coro;
1799}
1800
1801ecb_inline struct coro *
1802coro_deq (pTHX)
1803{
1804 int prio;
1805
1806 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1807 {
1808 struct coro **ready = coro_ready [prio];
1809
1810 if (ready [0])
1811 {
1812 struct coro *coro = ready [0];
1813 ready [0] = coro->next_ready;
1814 return coro;
1815 }
1816 }
1817
1818 return 0;
1819}
1820
1821static void
1822invoke_sv_ready_hook_helper (void)
817{ 1823{
818 dTHX; 1824 dTHX;
1825 dSP;
1826
1827 ENTER;
1828 SAVETMPS;
1829
1830 PUSHMARK (SP);
1831 PUTBACK;
1832 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1833
1834 FREETMPS;
1835 LEAVE;
1836}
1837
1838static int
1839api_ready (pTHX_ SV *coro_sv)
1840{
1841 struct coro *coro = SvSTATE (coro_sv);
1842
1843 if (coro->flags & CF_READY)
1844 return 0;
1845
1846 coro->flags |= CF_READY;
1847
1848 coro_enq (aTHX_ coro);
1849
1850 if (!coro_nready++)
1851 if (coroapi.readyhook)
1852 coroapi.readyhook ();
1853
1854 return 1;
1855}
1856
1857static int
1858api_is_ready (pTHX_ SV *coro_sv)
1859{
1860 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1861}
1862
1863/* expects to own a reference to next->hv */
1864ecb_inline void
1865prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1866{
1867 SV *prev_sv = SvRV (coro_current);
1868
1869 ta->prev = SvSTATE_hv (prev_sv);
1870 ta->next = next;
1871
1872 TRANSFER_CHECK (*ta);
1873
1874 SvRV_set (coro_current, (SV *)next->hv);
1875
1876 free_coro_mortal (aTHX);
1877 coro_mortal = prev_sv;
1878}
1879
1880static void
1881prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1882{
1883 for (;;)
1884 {
1885 struct coro *next = coro_deq (aTHX);
1886
1887 if (ecb_expect_true (next))
1888 {
1889 /* cannot transfer to destroyed coros, skip and look for next */
1890 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1891 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1892 else
1893 {
1894 next->flags &= ~CF_READY;
1895 --coro_nready;
1896
1897 prepare_schedule_to (aTHX_ ta, next);
1898 break;
1899 }
1900 }
1901 else
1902 {
1903 /* nothing to schedule: call the idle handler */
1904 if (SvROK (sv_idle)
1905 && SvOBJECT (SvRV (sv_idle)))
1906 {
1907 if (SvRV (sv_idle) == SvRV (coro_current))
1908 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1909
1910 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1911 api_ready (aTHX_ SvRV (sv_idle));
1912 --coro_nready;
1913 }
1914 else
1915 {
1916 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1917 dSP;
1918
1919 ENTER;
1920 SAVETMPS;
1921
1922 PUSHMARK (SP);
1923 PUTBACK;
1924 call_sv (sv_idle, G_VOID | G_DISCARD);
1925
1926 FREETMPS;
1927 LEAVE;
1928 }
1929 }
1930 }
1931}
1932
1933ecb_inline void
1934prepare_cede (pTHX_ struct coro_transfer_args *ta)
1935{
1936 api_ready (aTHX_ coro_current);
1937 prepare_schedule (aTHX_ ta);
1938}
1939
1940ecb_inline void
1941prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1942{
1943 SV *prev = SvRV (coro_current);
1944
1945 if (coro_nready)
1946 {
1947 prepare_schedule (aTHX_ ta);
1948 api_ready (aTHX_ prev);
1949 }
1950 else
1951 prepare_nop (aTHX_ ta);
1952}
1953
1954static void
1955api_schedule (pTHX)
1956{
819 struct transfer_args ta; 1957 struct coro_transfer_args ta;
820 1958
821 prepare_transfer (&ta, prev, next, flags); 1959 prepare_schedule (aTHX_ &ta);
822 TRANSFER (ta); 1960 TRANSFER (ta, 1);
823} 1961}
824 1962
825/** Coro ********************************************************************/ 1963static void
1964api_schedule_to (pTHX_ SV *coro_sv)
1965{
1966 struct coro_transfer_args ta;
1967 struct coro *next = SvSTATE (coro_sv);
826 1968
827#define PRIO_MAX 3 1969 SvREFCNT_inc_NN (coro_sv);
828#define PRIO_HIGH 1 1970 prepare_schedule_to (aTHX_ &ta, next);
829#define PRIO_NORMAL 0 1971}
830#define PRIO_LOW -1
831#define PRIO_IDLE -3
832#define PRIO_MIN -4
833 1972
834/* for Coro.pm */
835static GV *coro_current, *coro_idle;
836static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
837static int coro_nready;
838
839static void 1973static int
840coro_enq (SV *sv) 1974api_cede (pTHX)
841{ 1975{
842 int prio; 1976 struct coro_transfer_args ta;
843 1977
844 if (SvTYPE (sv) != SVt_PVHV) 1978 prepare_cede (aTHX_ &ta);
845 croak ("Coro::ready tried to enqueue something that is not a coroutine");
846 1979
847 prio = SvSTATE (sv)->prio; 1980 if (ecb_expect_true (ta.prev != ta.next))
1981 {
1982 TRANSFER (ta, 1);
1983 return 1;
1984 }
1985 else
1986 return 0;
1987}
848 1988
849 av_push (coro_ready [prio - PRIO_MIN], sv); 1989static int
1990api_cede_notself (pTHX)
1991{
850 coro_nready++; 1992 if (coro_nready)
851} 1993 {
1994 struct coro_transfer_args ta;
852 1995
853static SV * 1996 prepare_cede_notself (aTHX_ &ta);
854coro_deq (int min_prio) 1997 TRANSFER (ta, 1);
855{ 1998 return 1;
856 int prio = PRIO_MAX - PRIO_MIN; 1999 }
2000 else
2001 return 0;
2002}
857 2003
858 min_prio -= PRIO_MIN; 2004static void
859 if (min_prio < 0) 2005api_trace (pTHX_ SV *coro_sv, int flags)
860 min_prio = 0; 2006{
2007 struct coro *coro = SvSTATE (coro_sv);
861 2008
862 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2009 if (coro->flags & CF_RUNNING)
863 if (AvFILLp (coro_ready [prio]) >= 0) 2010 croak ("cannot enable tracing on a running coroutine, caught");
2011
2012 if (flags & CC_TRACE)
2013 {
2014 if (!coro->cctx)
2015 coro->cctx = cctx_new_run ();
2016 else if (!(coro->cctx->flags & CC_TRACE))
2017 croak ("cannot enable tracing on coroutine with custom stack, caught");
2018
2019 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2020 }
2021 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2022 {
2023 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2024
2025 if (coro->flags & CF_RUNNING)
2026 PL_runops = RUNOPS_DEFAULT;
2027 else
2028 coro->slot->runops = RUNOPS_DEFAULT;
2029 }
2030}
2031
2032static void
2033coro_push_av (pTHX_ AV *av, I32 gimme_v)
2034{
2035 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2036 {
2037 dSP;
2038
2039 if (gimme_v == G_SCALAR)
2040 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2041 else
864 { 2042 {
865 coro_nready--; 2043 int i;
866 return av_shift (coro_ready [prio]); 2044 EXTEND (SP, AvFILLp (av) + 1);
2045
2046 for (i = 0; i <= AvFILLp (av); ++i)
2047 PUSHs (AvARRAY (av)[i]);
867 } 2048 }
2049
2050 PUTBACK;
2051 }
2052}
2053
2054static void
2055coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2056{
2057 if (!coro->on_destroy)
2058 coro->on_destroy = newAV ();
2059
2060 av_push (coro->on_destroy, cb);
2061}
2062
2063static void
2064slf_destroy_join (pTHX_ struct CoroSLF *frame)
2065{
2066 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2067}
2068
2069static int
2070slf_check_join (pTHX_ struct CoroSLF *frame)
2071{
2072 struct coro *coro = (struct coro *)frame->data;
2073
2074 if (!coro->status)
2075 return 1;
2076
2077 frame->destroy = 0;
2078
2079 coro_push_av (aTHX_ coro->status, GIMME_V);
2080
2081 SvREFCNT_dec ((SV *)coro->hv);
868 2082
869 return 0; 2083 return 0;
870} 2084}
871 2085
872static void 2086static void
873api_ready (SV *coro) 2087slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
874{ 2088{
875 dTHX; 2089 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
876 2090
877 if (SvROK (coro)) 2091 if (items > 1)
878 coro = SvRV (coro); 2092 croak ("join called with too many arguments");
879 2093
880 LOCK; 2094 if (coro->status)
881 coro_enq (SvREFCNT_inc (coro)); 2095 frame->prepare = prepare_nop;
882 UNLOCK; 2096 else
883} 2097 {
884 2098 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
885static void 2099 frame->prepare = prepare_schedule;
886prepare_schedule (struct transfer_args *ta)
887{
888 SV *current, *prev, *next;
889
890 current = GvSV (coro_current);
891
892 for (;;)
893 { 2100 }
894 LOCK;
895 next = coro_deq (PRIO_MIN);
896 UNLOCK;
897 2101
898 if (next) 2102 frame->check = slf_check_join;
899 break; 2103 frame->destroy = slf_destroy_join;
2104 frame->data = (void *)coro;
2105 SvREFCNT_inc (coro->hv);
2106}
2107
2108static void
2109coro_call_on_destroy (pTHX_ struct coro *coro)
2110{
2111 AV *od = coro->on_destroy;
2112
2113 if (!od)
2114 return;
2115
2116 coro->on_destroy = 0;
2117 sv_2mortal ((SV *)od);
2118
2119 while (AvFILLp (od) >= 0)
2120 {
2121 SV *cb = sv_2mortal (av_pop (od));
2122
2123 /* coro hv's (and only hv's at the moment) are supported as well */
2124 if (SvSTATEhv_p (aTHX_ cb))
2125 api_ready (aTHX_ cb);
2126 else
2127 {
2128 dSP; /* don't disturb outer sp */
2129 PUSHMARK (SP);
2130
2131 if (coro->status)
2132 {
2133 PUTBACK;
2134 coro_push_av (aTHX_ coro->status, G_ARRAY);
2135 SPAGAIN;
2136 }
2137
2138 PUTBACK;
2139 call_sv (cb, G_VOID | G_DISCARD);
2140 }
2141 }
2142}
2143
2144static void
2145coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2146{
2147 AV *av;
2148
2149 if (coro->status)
2150 {
2151 av = coro->status;
2152 av_clear (av);
2153 }
2154 else
2155 av = coro->status = newAV ();
2156
2157 /* items are actually not so common, so optimise for this case */
2158 if (items)
2159 {
2160 int i;
2161
2162 av_extend (av, items - 1);
2163
2164 for (i = 0; i < items; ++i)
2165 av_push (av, SvREFCNT_inc_NN (arg [i]));
2166 }
2167}
2168
2169static void
2170slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2171{
2172 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2173 api_ready (aTHX_ sv_manager);
2174
2175 frame->prepare = prepare_schedule;
2176 frame->check = slf_check_repeat;
2177
2178 /* as a minor optimisation, we could unwind all stacks here */
2179 /* but that puts extra pressure on pp_slf, and is not worth much */
2180 /*coro_unwind_stacks (aTHX);*/
2181}
2182
2183static void
2184slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *coro_hv = (HV *)SvRV (coro_current);
2187
2188 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2189 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2190}
2191
2192static void
2193slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2194{
2195 HV *coro_hv;
2196 struct coro *coro;
2197
2198 if (items <= 0)
2199 croak ("Coro::cancel called without coro object,");
2200
2201 coro = SvSTATE (arg [0]);
2202 coro_hv = coro->hv;
2203
2204 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2205
2206 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2207 {
2208 /* coro currently busy cancelling something, so just notify it */
2209 coro->slf_frame.data = (void *)coro;
2210
2211 frame->prepare = prepare_nop;
2212 frame->check = slf_check_nop;
2213 }
2214 else if (coro_hv == (HV *)SvRV (coro_current))
2215 {
2216 /* cancelling the current coro is allowed, and equals terminate */
2217 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2218 }
2219 else
2220 {
2221 struct coro *self = SvSTATE_current;
2222
2223 /* otherwise we cancel directly, purely for speed reasons
2224 * unfortunately, this requires some magic trickery, as
2225 * somebody else could cancel us, so we have to fight the cancellation.
2226 * this is ugly, and hopefully fully worth the extra speed.
2227 * besides, I can't get the slow-but-safe version working...
2228 */
2229 slf_frame.data = 0;
2230 self->flags |= CF_NOCANCEL;
2231 coro_state_destroy (aTHX_ coro);
2232 self->flags &= ~CF_NOCANCEL;
2233
2234 if (slf_frame.data)
2235 {
2236 /* while we were busy we have been cancelled, so terminate */
2237 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2238 }
2239 else
2240 {
2241 frame->prepare = prepare_nop;
2242 frame->check = slf_check_nop;
2243 }
2244 }
2245}
2246
2247static int
2248slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2249{
2250 frame->prepare = 0;
2251 coro_unwind_stacks (aTHX);
2252
2253 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2254
2255 return 1;
2256}
2257
2258static int
2259safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2260{
2261 if (coro->cctx)
2262 croak ("coro inside C callback, unable to cancel at this time, caught");
2263
2264 if (coro->flags & CF_NEW)
2265 {
2266 coro_set_status (aTHX_ coro, arg, items);
2267 coro_state_destroy (aTHX_ coro);
2268 }
2269 else
2270 {
2271 if (!coro->slf_frame.prepare)
2272 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2273
2274 slf_destroy (aTHX_ coro);
2275
2276 coro_set_status (aTHX_ coro, arg, items);
2277 coro->slf_frame.prepare = prepare_nop;
2278 coro->slf_frame.check = slf_check_safe_cancel;
2279
2280 api_ready (aTHX_ (SV *)coro->hv);
2281 }
2282
2283 return 1;
2284}
2285
2286/*****************************************************************************/
2287/* async pool handler */
2288
2289static int
2290slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2291{
2292 HV *hv = (HV *)SvRV (coro_current);
2293 struct coro *coro = (struct coro *)frame->data;
2294
2295 if (!coro->invoke_cb)
2296 return 1; /* loop till we have invoke */
2297 else
2298 {
2299 hv_store (hv, "desc", sizeof ("desc") - 1,
2300 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2301
2302 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
900 2303
901 { 2304 {
902 dSP; 2305 dSP;
903 2306 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
904 ENTER;
905 SAVETMPS;
906
907 PUSHMARK (SP);
908 PUTBACK; 2307 PUTBACK;
909 call_sv (GvSV (coro_idle), G_DISCARD);
910
911 FREETMPS;
912 LEAVE;
913 } 2308 }
2309
2310 SvREFCNT_dec (GvAV (PL_defgv));
2311 GvAV (PL_defgv) = coro->invoke_av;
2312 coro->invoke_av = 0;
2313
2314 return 0;
2315 }
2316}
2317
2318static void
2319slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2320{
2321 HV *hv = (HV *)SvRV (coro_current);
2322 struct coro *coro = SvSTATE_hv ((SV *)hv);
2323
2324 if (ecb_expect_true (coro->saved_deffh))
914 } 2325 {
2326 /* subsequent iteration */
2327 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2328 coro->saved_deffh = 0;
915 2329
916 prev = SvRV (current); 2330 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
917 SvRV (current) = next; 2331 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2332 {
2333 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2334 return;
2335 }
2336 else
2337 {
2338 av_clear (GvAV (PL_defgv));
2339 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
918 2340
919 /* free this only after the transfer */ 2341 coro->prio = 0;
920 LOCK;
921 free_coro_mortal ();
922 UNLOCK;
923 coro_mortal = prev;
924 2342
925 ta->prev = SvSTATE (prev); 2343 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
926 ta->next = SvSTATE (next); 2344 api_trace (aTHX_ coro_current, 0);
927 ta->flags = TRANSFER_SAVE_ALL;
928}
929 2345
2346 frame->prepare = prepare_schedule;
2347 av_push (av_async_pool, SvREFCNT_inc (hv));
2348 }
2349 }
2350 else
2351 {
2352 /* first iteration, simply fall through */
2353 frame->prepare = prepare_nop;
2354 }
2355
2356 frame->check = slf_check_pool_handler;
2357 frame->data = (void *)coro;
2358}
2359
2360/*****************************************************************************/
2361/* rouse callback */
2362
2363#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2364
2365static void
2366coro_rouse_callback (pTHX_ CV *cv)
2367{
2368 dXSARGS;
2369 SV *data = (SV *)S_GENSUB_ARG;
2370
2371 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2372 {
2373 /* first call, set args */
2374 SV *coro = SvRV (data);
2375 AV *av = newAV ();
2376
2377 SvRV_set (data, (SV *)av);
2378
2379 /* better take a full copy of the arguments */
2380 while (items--)
2381 av_store (av, items, newSVsv (ST (items)));
2382
2383 api_ready (aTHX_ coro);
2384 SvREFCNT_dec (coro);
2385 }
2386
2387 XSRETURN_EMPTY;
2388}
2389
930static void 2390static int
2391slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2392{
2393 SV *data = (SV *)frame->data;
2394
2395 if (CORO_THROW)
2396 return 0;
2397
2398 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2399 return 1;
2400
2401 /* now push all results on the stack */
2402 {
2403 dSP;
2404 AV *av = (AV *)SvRV (data);
2405 int i;
2406
2407 EXTEND (SP, AvFILLp (av) + 1);
2408 for (i = 0; i <= AvFILLp (av); ++i)
2409 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2410
2411 /* we have stolen the elements, so set length to zero and free */
2412 AvFILLp (av) = -1;
2413 av_undef (av);
2414
2415 PUTBACK;
2416 }
2417
2418 return 0;
2419}
2420
2421static void
2422slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 SV *cb;
2425
2426 if (items)
2427 cb = arg [0];
2428 else
2429 {
2430 struct coro *coro = SvSTATE_current;
2431
2432 if (!coro->rouse_cb)
2433 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2434
2435 cb = sv_2mortal (coro->rouse_cb);
2436 coro->rouse_cb = 0;
2437 }
2438
2439 if (!SvROK (cb)
2440 || SvTYPE (SvRV (cb)) != SVt_PVCV
2441 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2442 croak ("Coro::rouse_wait called with illegal callback argument,");
2443
2444 {
2445 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2446 SV *data = (SV *)S_GENSUB_ARG;
2447
2448 frame->data = (void *)data;
2449 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2450 frame->check = slf_check_rouse_wait;
2451 }
2452}
2453
2454static SV *
2455coro_new_rouse_cb (pTHX)
2456{
2457 HV *hv = (HV *)SvRV (coro_current);
2458 struct coro *coro = SvSTATE_hv (hv);
2459 SV *data = newRV_inc ((SV *)hv);
2460 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2461
2462 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2463 SvREFCNT_dec (data); /* magicext increases the refcount */
2464
2465 SvREFCNT_dec (coro->rouse_cb);
2466 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2467
2468 return cb;
2469}
2470
2471/*****************************************************************************/
2472/* schedule-like-function opcode (SLF) */
2473
2474static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2475static const CV *slf_cv;
2476static SV **slf_argv;
2477static int slf_argc, slf_arga; /* count, allocated */
2478static I32 slf_ax; /* top of stack, for restore */
2479
2480/* this restores the stack in the case we patched the entersub, to */
2481/* recreate the stack frame as perl will on following calls */
2482/* since entersub cleared the stack */
2483static OP *
2484pp_restore (pTHX)
2485{
2486 int i;
2487 SV **SP = PL_stack_base + slf_ax;
2488
2489 PUSHMARK (SP);
2490
2491 EXTEND (SP, slf_argc + 1);
2492
2493 for (i = 0; i < slf_argc; ++i)
2494 PUSHs (sv_2mortal (slf_argv [i]));
2495
2496 PUSHs ((SV *)CvGV (slf_cv));
2497
2498 RETURNOP (slf_restore.op_first);
2499}
2500
2501static void
2502slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2503{
2504 SV **arg = (SV **)slf_frame.data;
2505
2506 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2507}
2508
2509static void
2510slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2511{
2512 if (items != 2)
2513 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2514
2515 frame->prepare = slf_prepare_transfer;
2516 frame->check = slf_check_nop;
2517 frame->data = (void *)arg; /* let's hope it will stay valid */
2518}
2519
2520static void
2521slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2522{
2523 frame->prepare = prepare_schedule;
2524 frame->check = slf_check_nop;
2525}
2526
2527static void
931prepare_cede (struct transfer_args *ta) 2528slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
932{ 2529{
933 LOCK; 2530 struct coro *next = (struct coro *)slf_frame.data;
934 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935 UNLOCK;
936 2531
2532 SvREFCNT_inc_NN (next->hv);
937 prepare_schedule (ta); 2533 prepare_schedule_to (aTHX_ ta, next);
938} 2534}
939 2535
940static void 2536static void
941api_schedule (void) 2537slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
942{ 2538{
943 dTHX; 2539 if (!items)
2540 croak ("Coro::schedule_to expects a coroutine argument, caught");
2541
2542 frame->data = (void *)SvSTATE (arg [0]);
2543 frame->prepare = slf_prepare_schedule_to;
2544 frame->check = slf_check_nop;
2545}
2546
2547static void
2548slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 api_ready (aTHX_ SvRV (coro_current));
2551
2552 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2553}
2554
2555static void
2556slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 frame->prepare = prepare_cede;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2564{
2565 frame->prepare = prepare_cede_notself;
2566 frame->check = slf_check_nop;
2567}
2568
2569/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2570static void
2571slf_destroy (pTHX_ struct coro *coro)
2572{
2573 /* this callback is reserved for slf functions needing to do cleanup */
2574 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2575 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2576
2577 /*
2578 * The on_destroy above most likely is from an SLF call.
2579 * Since by definition the SLF call will not finish when we destroy
2580 * the coro, we will have to force-finish it here, otherwise
2581 * cleanup functions cannot call SLF functions.
2582 */
2583 coro->slf_frame.prepare = 0;
2584}
2585
2586/*
2587 * these not obviously related functions are all rolled into one
2588 * function to increase chances that they all will call transfer with the same
2589 * stack offset
2590 * SLF stands for "schedule-like-function".
2591 */
2592static OP *
2593pp_slf (pTHX)
2594{
2595 I32 checkmark; /* mark SP to see how many elements check has pushed */
2596
2597 /* set up the slf frame, unless it has already been set-up */
2598 /* the latter happens when a new coro has been started */
2599 /* or when a new cctx was attached to an existing coroutine */
2600 if (ecb_expect_true (!slf_frame.prepare))
2601 {
2602 /* first iteration */
2603 dSP;
2604 SV **arg = PL_stack_base + TOPMARK + 1;
2605 int items = SP - arg; /* args without function object */
2606 SV *gv = *sp;
2607
2608 /* do a quick consistency check on the "function" object, and if it isn't */
2609 /* for us, divert to the real entersub */
2610 if (SvTYPE (gv) != SVt_PVGV
2611 || !GvCV (gv)
2612 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2613 return PL_ppaddr[OP_ENTERSUB](aTHX);
2614
2615 if (!(PL_op->op_flags & OPf_STACKED))
2616 {
2617 /* ampersand-form of call, use @_ instead of stack */
2618 AV *av = GvAV (PL_defgv);
2619 arg = AvARRAY (av);
2620 items = AvFILLp (av) + 1;
2621 }
2622
2623 /* now call the init function, which needs to set up slf_frame */
2624 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2625 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2626
2627 /* pop args */
2628 SP = PL_stack_base + POPMARK;
2629
2630 PUTBACK;
2631 }
2632
2633 /* now that we have a slf_frame, interpret it! */
2634 /* we use a callback system not to make the code needlessly */
2635 /* complicated, but so we can run multiple perl coros from one cctx */
2636
2637 do
2638 {
944 struct transfer_args ta; 2639 struct coro_transfer_args ta;
945 2640
946 prepare_schedule (&ta); 2641 slf_frame.prepare (aTHX_ &ta);
947 TRANSFER (ta); 2642 TRANSFER (ta, 0);
948}
949 2643
2644 checkmark = PL_stack_sp - PL_stack_base;
2645 }
2646 while (slf_frame.check (aTHX_ &slf_frame));
2647
2648 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2649
2650 /* exception handling */
2651 if (ecb_expect_false (CORO_THROW))
2652 {
2653 SV *exception = sv_2mortal (CORO_THROW);
2654
2655 CORO_THROW = 0;
2656 sv_setsv (ERRSV, exception);
2657 croak (0);
2658 }
2659
2660 /* return value handling - mostly like entersub */
2661 /* make sure we put something on the stack in scalar context */
2662 if (GIMME_V == G_SCALAR
2663 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2664 {
2665 dSP;
2666 SV **bot = PL_stack_base + checkmark;
2667
2668 if (sp == bot) /* too few, push undef */
2669 bot [1] = &PL_sv_undef;
2670 else /* too many, take last one */
2671 bot [1] = *sp;
2672
2673 SP = bot + 1;
2674
2675 PUTBACK;
2676 }
2677
2678 return NORMAL;
2679}
2680
2681static void
2682api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2683{
2684 int i;
2685 SV **arg = PL_stack_base + ax;
2686 int items = PL_stack_sp - arg + 1;
2687
2688 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2689
2690 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2691 && PL_op->op_ppaddr != pp_slf)
2692 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2693
2694 CvFLAGS (cv) |= CVf_SLF;
2695 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2696 slf_cv = cv;
2697
2698 /* we patch the op, and then re-run the whole call */
2699 /* we have to put the same argument on the stack for this to work */
2700 /* and this will be done by pp_restore */
2701 slf_restore.op_next = (OP *)&slf_restore;
2702 slf_restore.op_type = OP_CUSTOM;
2703 slf_restore.op_ppaddr = pp_restore;
2704 slf_restore.op_first = PL_op;
2705
2706 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2707
2708 if (PL_op->op_flags & OPf_STACKED)
2709 {
2710 if (items > slf_arga)
2711 {
2712 slf_arga = items;
2713 Safefree (slf_argv);
2714 New (0, slf_argv, slf_arga, SV *);
2715 }
2716
2717 slf_argc = items;
2718
2719 for (i = 0; i < items; ++i)
2720 slf_argv [i] = SvREFCNT_inc (arg [i]);
2721 }
2722 else
2723 slf_argc = 0;
2724
2725 PL_op->op_ppaddr = pp_slf;
2726 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2727
2728 PL_op = (OP *)&slf_restore;
2729}
2730
2731/*****************************************************************************/
2732/* dynamic wind */
2733
2734static void
2735on_enterleave_call (pTHX_ SV *cb)
2736{
2737 dSP;
2738
2739 PUSHSTACK;
2740
2741 PUSHMARK (SP);
2742 PUTBACK;
2743 call_sv (cb, G_VOID | G_DISCARD);
2744 SPAGAIN;
2745
2746 POPSTACK;
2747}
2748
2749static SV *
2750coro_avp_pop_and_free (pTHX_ AV **avp)
2751{
2752 AV *av = *avp;
2753 SV *res = av_pop (av);
2754
2755 if (AvFILLp (av) < 0)
2756 {
2757 *avp = 0;
2758 SvREFCNT_dec (av);
2759 }
2760
2761 return res;
2762}
2763
2764static void
2765coro_pop_on_enter (pTHX_ void *coro)
2766{
2767 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2768 SvREFCNT_dec (cb);
2769}
2770
2771static void
2772coro_pop_on_leave (pTHX_ void *coro)
2773{
2774 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2775 on_enterleave_call (aTHX_ sv_2mortal (cb));
2776}
2777
2778/*****************************************************************************/
2779/* PerlIO::cede */
2780
2781typedef struct
2782{
2783 PerlIOBuf base;
2784 NV next, every;
2785} PerlIOCede;
2786
2787static IV ecb_cold
2788PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2789{
2790 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2791
2792 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2793 self->next = nvtime () + self->every;
2794
2795 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2796}
2797
2798static SV * ecb_cold
2799PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2800{
2801 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2802
2803 return newSVnv (self->every);
2804}
2805
2806static IV
2807PerlIOCede_flush (pTHX_ PerlIO *f)
2808{
2809 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2810 double now = nvtime ();
2811
2812 if (now >= self->next)
2813 {
2814 api_cede (aTHX);
2815 self->next = now + self->every;
2816 }
2817
2818 return PerlIOBuf_flush (aTHX_ f);
2819}
2820
2821static PerlIO_funcs PerlIO_cede =
2822{
2823 sizeof(PerlIO_funcs),
2824 "cede",
2825 sizeof(PerlIOCede),
2826 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2827 PerlIOCede_pushed,
2828 PerlIOBuf_popped,
2829 PerlIOBuf_open,
2830 PerlIOBase_binmode,
2831 PerlIOCede_getarg,
2832 PerlIOBase_fileno,
2833 PerlIOBuf_dup,
2834 PerlIOBuf_read,
2835 PerlIOBuf_unread,
2836 PerlIOBuf_write,
2837 PerlIOBuf_seek,
2838 PerlIOBuf_tell,
2839 PerlIOBuf_close,
2840 PerlIOCede_flush,
2841 PerlIOBuf_fill,
2842 PerlIOBase_eof,
2843 PerlIOBase_error,
2844 PerlIOBase_clearerr,
2845 PerlIOBase_setlinebuf,
2846 PerlIOBuf_get_base,
2847 PerlIOBuf_bufsiz,
2848 PerlIOBuf_get_ptr,
2849 PerlIOBuf_get_cnt,
2850 PerlIOBuf_set_ptrcnt,
2851};
2852
2853/*****************************************************************************/
2854/* Coro::Semaphore & Coro::Signal */
2855
2856static SV *
2857coro_waitarray_new (pTHX_ int count)
2858{
2859 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2860 AV *av = newAV ();
2861 SV **ary;
2862
2863 /* unfortunately, building manually saves memory */
2864 Newx (ary, 2, SV *);
2865 AvALLOC (av) = ary;
2866#if PERL_VERSION_ATLEAST (5,10,0)
2867 AvARRAY (av) = ary;
2868#else
2869 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2870 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2871 SvPVX ((SV *)av) = (char *)ary;
2872#endif
2873 AvMAX (av) = 1;
2874 AvFILLp (av) = 0;
2875 ary [0] = newSViv (count);
2876
2877 return newRV_noinc ((SV *)av);
2878}
2879
2880/* semaphore */
2881
2882static void
2883coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2884{
2885 SV *count_sv = AvARRAY (av)[0];
2886 IV count = SvIVX (count_sv);
2887
2888 count += adjust;
2889 SvIVX (count_sv) = count;
2890
2891 /* now wake up as many waiters as are expected to lock */
2892 while (count > 0 && AvFILLp (av) > 0)
2893 {
2894 SV *cb;
2895
2896 /* swap first two elements so we can shift a waiter */
2897 AvARRAY (av)[0] = AvARRAY (av)[1];
2898 AvARRAY (av)[1] = count_sv;
2899 cb = av_shift (av);
2900
2901 if (SvOBJECT (cb))
2902 {
2903 api_ready (aTHX_ cb);
2904 --count;
2905 }
2906 else if (SvTYPE (cb) == SVt_PVCV)
2907 {
2908 dSP;
2909 PUSHMARK (SP);
2910 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2911 PUTBACK;
2912 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2913 }
2914
2915 SvREFCNT_dec (cb);
2916 }
2917}
2918
2919static void
2920coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2921{
2922 /* call $sem->adjust (0) to possibly wake up some other waiters */
2923 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2924}
2925
950static void 2926static int
951api_cede (void) 2927slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
952{ 2928{
953 dTHX; 2929 AV *av = (AV *)frame->data;
954 struct transfer_args ta; 2930 SV *count_sv = AvARRAY (av)[0];
2931 SV *coro_hv = SvRV (coro_current);
955 2932
956 prepare_cede (&ta); 2933 /* if we are about to throw, don't actually acquire the lock, just throw */
957 TRANSFER (ta); 2934 if (CORO_THROW)
958} 2935 return 0;
2936 else if (SvIVX (count_sv) > 0)
2937 {
2938 frame->destroy = 0;
959 2939
2940 if (acquire)
2941 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2942 else
2943 coro_semaphore_adjust (aTHX_ av, 0);
2944
2945 return 0;
2946 }
2947 else
2948 {
2949 int i;
2950 /* if we were woken up but can't down, we look through the whole */
2951 /* waiters list and only add us if we aren't in there already */
2952 /* this avoids some degenerate memory usage cases */
2953 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2954 if (AvARRAY (av)[i] == coro_hv)
2955 return 1;
2956
2957 av_push (av, SvREFCNT_inc (coro_hv));
2958 return 1;
2959 }
2960}
2961
2962static int
2963slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2964{
2965 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2966}
2967
2968static int
2969slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2970{
2971 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2972}
2973
2974static void
2975slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2976{
2977 AV *av = (AV *)SvRV (arg [0]);
2978
2979 if (SvIVX (AvARRAY (av)[0]) > 0)
2980 {
2981 frame->data = (void *)av;
2982 frame->prepare = prepare_nop;
2983 }
2984 else
2985 {
2986 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2987
2988 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2989 frame->prepare = prepare_schedule;
2990 /* to avoid race conditions when a woken-up coro gets terminated */
2991 /* we arrange for a temporary on_destroy that calls adjust (0) */
2992 frame->destroy = coro_semaphore_destroy;
2993 }
2994}
2995
2996static void
2997slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2998{
2999 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3000 frame->check = slf_check_semaphore_down;
3001}
3002
3003static void
3004slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3005{
3006 if (items >= 2)
3007 {
3008 /* callback form */
3009 AV *av = (AV *)SvRV (arg [0]);
3010 SV *cb_cv = s_get_cv_croak (arg [1]);
3011
3012 av_push (av, SvREFCNT_inc_NN (cb_cv));
3013
3014 if (SvIVX (AvARRAY (av)[0]) > 0)
3015 coro_semaphore_adjust (aTHX_ av, 0);
3016
3017 frame->prepare = prepare_nop;
3018 frame->check = slf_check_nop;
3019 }
3020 else
3021 {
3022 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3023 frame->check = slf_check_semaphore_wait;
3024 }
3025}
3026
3027/* signal */
3028
3029static void
3030coro_signal_wake (pTHX_ AV *av, int count)
3031{
3032 SvIVX (AvARRAY (av)[0]) = 0;
3033
3034 /* now signal count waiters */
3035 while (count > 0 && AvFILLp (av) > 0)
3036 {
3037 SV *cb;
3038
3039 /* swap first two elements so we can shift a waiter */
3040 cb = AvARRAY (av)[0];
3041 AvARRAY (av)[0] = AvARRAY (av)[1];
3042 AvARRAY (av)[1] = cb;
3043
3044 cb = av_shift (av);
3045
3046 if (SvTYPE (cb) == SVt_PVCV)
3047 {
3048 dSP;
3049 PUSHMARK (SP);
3050 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3051 PUTBACK;
3052 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3053 }
3054 else
3055 {
3056 api_ready (aTHX_ cb);
3057 sv_setiv (cb, 0); /* signal waiter */
3058 }
3059
3060 SvREFCNT_dec (cb);
3061
3062 --count;
3063 }
3064}
3065
3066static int
3067slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3068{
3069 /* if we are about to throw, also stop waiting */
3070 return SvROK ((SV *)frame->data) && !CORO_THROW;
3071}
3072
3073static void
3074slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3075{
3076 AV *av = (AV *)SvRV (arg [0]);
3077
3078 if (items >= 2)
3079 {
3080 SV *cb_cv = s_get_cv_croak (arg [1]);
3081 av_push (av, SvREFCNT_inc_NN (cb_cv));
3082
3083 if (SvIVX (AvARRAY (av)[0]))
3084 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3085
3086 frame->prepare = prepare_nop;
3087 frame->check = slf_check_nop;
3088 }
3089 else if (SvIVX (AvARRAY (av)[0]))
3090 {
3091 SvIVX (AvARRAY (av)[0]) = 0;
3092 frame->prepare = prepare_nop;
3093 frame->check = slf_check_nop;
3094 }
3095 else
3096 {
3097 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3098
3099 av_push (av, waiter);
3100
3101 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3102 frame->prepare = prepare_schedule;
3103 frame->check = slf_check_signal_wait;
3104 }
3105}
3106
3107/*****************************************************************************/
3108/* Coro::AIO */
3109
3110#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3111
3112/* helper storage struct */
3113struct io_state
3114{
3115 int errorno;
3116 I32 laststype; /* U16 in 5.10.0 */
3117 int laststatval;
3118 Stat_t statcache;
3119};
3120
3121static void
3122coro_aio_callback (pTHX_ CV *cv)
3123{
3124 dXSARGS;
3125 AV *state = (AV *)S_GENSUB_ARG;
3126 SV *coro = av_pop (state);
3127 SV *data_sv = newSV (sizeof (struct io_state));
3128
3129 av_extend (state, items - 1);
3130
3131 sv_upgrade (data_sv, SVt_PV);
3132 SvCUR_set (data_sv, sizeof (struct io_state));
3133 SvPOK_only (data_sv);
3134
3135 {
3136 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3137
3138 data->errorno = errno;
3139 data->laststype = PL_laststype;
3140 data->laststatval = PL_laststatval;
3141 data->statcache = PL_statcache;
3142 }
3143
3144 /* now build the result vector out of all the parameters and the data_sv */
3145 {
3146 int i;
3147
3148 for (i = 0; i < items; ++i)
3149 av_push (state, SvREFCNT_inc_NN (ST (i)));
3150 }
3151
3152 av_push (state, data_sv);
3153
3154 api_ready (aTHX_ coro);
3155 SvREFCNT_dec (coro);
3156 SvREFCNT_dec ((AV *)state);
3157}
3158
3159static int
3160slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3161{
3162 AV *state = (AV *)frame->data;
3163
3164 /* if we are about to throw, return early */
3165 /* this does not cancel the aio request, but at least */
3166 /* it quickly returns */
3167 if (CORO_THROW)
3168 return 0;
3169
3170 /* one element that is an RV? repeat! */
3171 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3172 return 1;
3173
3174 /* restore status */
3175 {
3176 SV *data_sv = av_pop (state);
3177 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3178
3179 errno = data->errorno;
3180 PL_laststype = data->laststype;
3181 PL_laststatval = data->laststatval;
3182 PL_statcache = data->statcache;
3183
3184 SvREFCNT_dec (data_sv);
3185 }
3186
3187 /* push result values */
3188 {
3189 dSP;
3190 int i;
3191
3192 EXTEND (SP, AvFILLp (state) + 1);
3193 for (i = 0; i <= AvFILLp (state); ++i)
3194 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3195
3196 PUTBACK;
3197 }
3198
3199 return 0;
3200}
3201
3202static void
3203slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3204{
3205 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3206 SV *coro_hv = SvRV (coro_current);
3207 struct coro *coro = SvSTATE_hv (coro_hv);
3208
3209 /* put our coroutine id on the state arg */
3210 av_push (state, SvREFCNT_inc_NN (coro_hv));
3211
3212 /* first see whether we have a non-zero priority and set it as AIO prio */
3213 if (coro->prio)
3214 {
3215 dSP;
3216
3217 static SV *prio_cv;
3218 static SV *prio_sv;
3219
3220 if (ecb_expect_false (!prio_cv))
3221 {
3222 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3223 prio_sv = newSViv (0);
3224 }
3225
3226 PUSHMARK (SP);
3227 sv_setiv (prio_sv, coro->prio);
3228 XPUSHs (prio_sv);
3229
3230 PUTBACK;
3231 call_sv (prio_cv, G_VOID | G_DISCARD);
3232 }
3233
3234 /* now call the original request */
3235 {
3236 dSP;
3237 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3238 int i;
3239
3240 PUSHMARK (SP);
3241
3242 /* first push all args to the stack */
3243 EXTEND (SP, items + 1);
3244
3245 for (i = 0; i < items; ++i)
3246 PUSHs (arg [i]);
3247
3248 /* now push the callback closure */
3249 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3250
3251 /* now call the AIO function - we assume our request is uncancelable */
3252 PUTBACK;
3253 call_sv ((SV *)req, G_VOID | G_DISCARD);
3254 }
3255
3256 /* now that the request is going, we loop till we have a result */
3257 frame->data = (void *)state;
3258 frame->prepare = prepare_schedule;
3259 frame->check = slf_check_aio_req;
3260}
3261
3262static void
3263coro_aio_req_xs (pTHX_ CV *cv)
3264{
3265 dXSARGS;
3266
3267 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3268
3269 XSRETURN_EMPTY;
3270}
3271
3272/*****************************************************************************/
3273
3274#if CORO_CLONE
3275# include "clone.c"
3276#endif
3277
3278/*****************************************************************************/
3279
3280static SV *
3281coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3282{
3283 SV *coro_sv;
3284 struct coro *coro;
3285 MAGIC *mg;
3286 HV *hv;
3287 SV *cb;
3288 int i;
3289
3290 if (argc > 0)
3291 {
3292 cb = s_get_cv_croak (argv [0]);
3293
3294 if (!is_coro)
3295 {
3296 if (CvISXSUB (cb))
3297 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3298
3299 if (!CvROOT (cb))
3300 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3301 }
3302 }
3303
3304 Newz (0, coro, 1, struct coro);
3305 coro->args = newAV ();
3306 coro->flags = CF_NEW;
3307
3308 if (coro_first) coro_first->prev = coro;
3309 coro->next = coro_first;
3310 coro_first = coro;
3311
3312 coro->hv = hv = newHV ();
3313 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3314 mg->mg_flags |= MGf_DUP;
3315 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3316
3317 if (argc > 0)
3318 {
3319 av_extend (coro->args, argc + is_coro - 1);
3320
3321 if (is_coro)
3322 {
3323 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3324 cb = (SV *)cv_coro_run;
3325 }
3326
3327 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3328
3329 for (i = 1; i < argc; i++)
3330 av_push (coro->args, newSVsv (argv [i]));
3331 }
3332
3333 return coro_sv;
3334}
3335
3336#ifndef __cplusplus
3337ecb_cold XS(boot_Coro__State);
3338#endif
3339
3340#if CORO_JIT
3341
3342static void ecb_noinline ecb_cold
3343pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3344{
3345 dSP;
3346 AV *av = newAV ();
3347
3348 av_store (av, 3, newSVuv (d));
3349 av_store (av, 2, newSVuv (c));
3350 av_store (av, 1, newSVuv (b));
3351 av_store (av, 0, newSVuv (a));
3352
3353 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3354
3355 PUTBACK;
3356}
3357
3358static void ecb_noinline ecb_cold
3359jit_init (pTHX)
3360{
3361 dSP;
3362 SV *load, *save;
3363 char *map_base;
3364 char *load_ptr, *save_ptr;
3365 STRLEN load_len, save_len, map_len;
3366 int count;
3367
3368 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3369
3370 PUSHMARK (SP);
3371 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3372 #include "state.h"
3373 count = call_pv ("Coro::State::_jit", G_ARRAY);
3374 SPAGAIN;
3375
3376 save = POPs; save_ptr = SvPVbyte (save, save_len);
3377 load = POPs; load_ptr = SvPVbyte (load, load_len);
3378
3379 map_len = load_len + save_len + 16;
3380
3381 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3382
3383 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3384
3385 load_perl_slots = (load_save_perl_slots_type)map_base;
3386 memcpy (map_base, load_ptr, load_len);
3387
3388 map_base += (load_len + 15) & ~15;
3389
3390 save_perl_slots = (load_save_perl_slots_type)map_base;
3391 memcpy (map_base, save_ptr, save_len);
3392
3393 /* we are good citizens and try to make the page read-only, so the evil evil */
3394 /* hackers might have it a bit more difficult */
3395 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3396
3397 PUTBACK;
3398 eval_pv ("undef &Coro::State::_jit", 1);
3399}
3400
3401#endif
3402
960MODULE = Coro::State PACKAGE = Coro::State 3403MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
961 3404
962PROTOTYPES: DISABLE 3405PROTOTYPES: DISABLE
963 3406
964BOOT: 3407BOOT:
965{ 3408{
966#ifdef USE_ITHREADS 3409#ifdef USE_ITHREADS
967 MUTEX_INIT (&coro_mutex); 3410# if CORO_PTHREAD
3411 coro_thx = PERL_GET_CONTEXT;
968#endif 3412# endif
969 BOOT_PAGESIZE; 3413#endif
3414 /* perl defines these to check for existance first, but why it doesn't */
3415 /* just create them one at init time is not clear to me, except for */
3416 /* programs trying to delete them, but... */
3417 /* anyway, we declare this as invalid and make sure they are initialised here */
3418 DEFSV;
3419 ERRSV;
3420
3421 cctx_current = cctx_new_empty ();
3422
3423 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3424 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3425
3426 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3427 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3428 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3429
3430 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3431 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3432 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
970 3433
971 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3434 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972 3435
973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3436 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3437 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3438 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3439 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976 3440
977 main_mainstack = PL_mainstack; 3441 main_mainstack = PL_mainstack;
3442 main_top_env = PL_top_env;
978 3443
3444 while (main_top_env->je_prev)
3445 main_top_env = main_top_env->je_prev;
3446
3447 {
3448 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3449
3450 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3451 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3452
3453 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3454 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3455 }
3456
979 coroapi.ver = CORO_API_VERSION; 3457 coroapi.ver = CORO_API_VERSION;
3458 coroapi.rev = CORO_API_REVISION;
3459
980 coroapi.transfer = api_transfer; 3460 coroapi.transfer = api_transfer;
981 3461
3462 coroapi.sv_state = SvSTATE_;
3463 coroapi.execute_slf = api_execute_slf;
3464 coroapi.prepare_nop = prepare_nop;
3465 coroapi.prepare_schedule = prepare_schedule;
3466 coroapi.prepare_cede = prepare_cede;
3467 coroapi.prepare_cede_notself = prepare_cede_notself;
3468
3469 time_init (aTHX);
3470
982 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3471 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3472#if CORO_JIT
3473 PUTBACK;
3474 jit_init (aTHX);
3475 SPAGAIN;
3476#endif
983} 3477}
984 3478
985SV * 3479SV *
986new (char *klass, ...) 3480new (SV *klass, ...)
3481 ALIAS:
3482 Coro::new = 1
987 CODE: 3483 CODE:
988{ 3484 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
989 struct coro *coro; 3485 OUTPUT:
990 HV *hv;
991 int i;
992
993 Newz (0, coro, 1, struct coro);
994 coro->args = newAV ();
995
996 hv = newHV ();
997 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
998 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999
1000 for (i = 1; i < items; i++)
1001 av_push (coro->args, newSVsv (ST (i)));
1002}
1003 OUTPUT:
1004 RETVAL 3486 RETVAL
1005 3487
1006void 3488void
1007_set_stacklevel (...) 3489transfer (...)
1008 ALIAS: 3490 PROTOTYPE: $$
1009 Coro::State::transfer = 1 3491 CODE:
1010 Coro::schedule = 2 3492 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1011 Coro::cede = 3
1012 Coro::Cont::yield = 4
1013 CODE:
1014{
1015 struct transfer_args ta;
1016 3493
1017 switch (ix) 3494SV *
3495clone (Coro::State coro)
3496 CODE:
3497{
3498#if CORO_CLONE
3499 struct coro *ncoro = coro_clone (aTHX_ coro);
3500 MAGIC *mg;
3501 /* TODO: too much duplication */
3502 ncoro->hv = newHV ();
3503 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3504 mg->mg_flags |= MGf_DUP;
3505 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3506#else
3507 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3508#endif
3509}
3510 OUTPUT:
3511 RETVAL
3512
3513int
3514cctx_stacksize (int new_stacksize = 0)
3515 PROTOTYPE: ;$
3516 CODE:
3517 RETVAL = cctx_stacksize;
3518 if (new_stacksize)
1018 { 3519 {
1019 case 0: 3520 cctx_stacksize = new_stacksize;
1020 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3521 ++cctx_gen;
1021 ta.next = 0;
1022 ta.flags = TRANSFER_SET_STACKLEVEL;
1023 break;
1024
1025 case 1:
1026 if (items != 3)
1027 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1028
1029 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1030 break;
1031
1032 case 2:
1033 prepare_schedule (&ta);
1034 break;
1035
1036 case 3:
1037 prepare_cede (&ta);
1038 break;
1039
1040 case 4:
1041 {
1042 SV *yieldstack;
1043 SV *sv;
1044 AV *defav = GvAV (PL_defgv);
1045
1046 yieldstack = *hv_fetch (
1047 (HV *)SvRV (GvSV (coro_current)),
1048 "yieldstack", sizeof ("yieldstack") - 1,
1049 0
1050 );
1051
1052 /* set up @_ -- ugly */
1053 av_clear (defav);
1054 av_fill (defav, items - 1);
1055 while (items--)
1056 av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058 sv = av_pop ((AV *)SvRV (yieldstack));
1059 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1060 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1061 ta.flags = 0;
1062 SvREFCNT_dec (sv);
1063 }
1064 break;
1065
1066 } 3522 }
3523 OUTPUT:
3524 RETVAL
1067 3525
1068 TRANSFER (ta); 3526int
1069} 3527cctx_max_idle (int max_idle = 0)
1070 3528 PROTOTYPE: ;$
1071void
1072_clone_state_from (SV *dst, SV *src)
1073 CODE: 3529 CODE:
1074{ 3530 RETVAL = cctx_max_idle;
1075 struct coro *coro_src = SvSTATE (src); 3531 if (max_idle > 1)
1076 3532 cctx_max_idle = max_idle;
1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3533 OUTPUT:
1078 3534 RETVAL
1079 ++coro_src->refcnt;
1080 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081}
1082
1083void
1084_exit (code)
1085 int code
1086 PROTOTYPE: $
1087 CODE:
1088 _exit (code);
1089 3535
1090int 3536int
1091cctx_count () 3537cctx_count ()
3538 PROTOTYPE:
1092 CODE: 3539 CODE:
1093 RETVAL = cctx_count; 3540 RETVAL = cctx_count;
1094 OUTPUT: 3541 OUTPUT:
1095 RETVAL 3542 RETVAL
1096 3543
1097int 3544int
1098cctx_idle () 3545cctx_idle ()
3546 PROTOTYPE:
1099 CODE: 3547 CODE:
1100 RETVAL = cctx_idle; 3548 RETVAL = cctx_idle;
1101 OUTPUT: 3549 OUTPUT:
1102 RETVAL 3550 RETVAL
1103 3551
3552void
3553list ()
3554 PROTOTYPE:
3555 PPCODE:
3556{
3557 struct coro *coro;
3558 for (coro = coro_first; coro; coro = coro->next)
3559 if (coro->hv)
3560 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3561}
3562
3563void
3564call (Coro::State coro, SV *coderef)
3565 ALIAS:
3566 eval = 1
3567 CODE:
3568{
3569 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3570 {
3571 struct coro *current = SvSTATE_current;
3572 struct CoroSLF slf_save;
3573
3574 if (current != coro)
3575 {
3576 PUTBACK;
3577 save_perl (aTHX_ current);
3578 load_perl (aTHX_ coro);
3579 /* the coro is most likely in an active SLF call.
3580 * while not strictly required (the code we execute is
3581 * not allowed to call any SLF functions), it's cleaner
3582 * to reinitialise the slf_frame and restore it later.
3583 * This might one day allow us to actually do SLF calls
3584 * from code executed here.
3585 */
3586 slf_save = slf_frame;
3587 slf_frame.prepare = 0;
3588 SPAGAIN;
3589 }
3590
3591 PUSHSTACK;
3592
3593 PUSHMARK (SP);
3594 PUTBACK;
3595
3596 if (ix)
3597 eval_sv (coderef, 0);
3598 else
3599 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3600
3601 POPSTACK;
3602 SPAGAIN;
3603
3604 if (current != coro)
3605 {
3606 PUTBACK;
3607 slf_frame = slf_save;
3608 save_perl (aTHX_ coro);
3609 load_perl (aTHX_ current);
3610 SPAGAIN;
3611 }
3612 }
3613}
3614
3615SV *
3616is_ready (Coro::State coro)
3617 PROTOTYPE: $
3618 ALIAS:
3619 is_ready = CF_READY
3620 is_running = CF_RUNNING
3621 is_new = CF_NEW
3622 is_destroyed = CF_ZOMBIE
3623 is_zombie = CF_ZOMBIE
3624 is_suspended = CF_SUSPENDED
3625 CODE:
3626 RETVAL = boolSV (coro->flags & ix);
3627 OUTPUT:
3628 RETVAL
3629
3630void
3631throw (SV *self, SV *exception = &PL_sv_undef)
3632 PROTOTYPE: $;$
3633 CODE:
3634{
3635 struct coro *coro = SvSTATE (self);
3636 struct coro *current = SvSTATE_current;
3637 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3638 SvREFCNT_dec (*exceptionp);
3639 SvGETMAGIC (exception);
3640 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3641
3642 api_ready (aTHX_ self);
3643}
3644
3645void
3646api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3647 PROTOTYPE: $;$
3648 C_ARGS: aTHX_ coro, flags
3649
3650SV *
3651has_cctx (Coro::State coro)
3652 PROTOTYPE: $
3653 CODE:
3654 /* maybe manage the running flag differently */
3655 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3656 OUTPUT:
3657 RETVAL
3658
3659int
3660is_traced (Coro::State coro)
3661 PROTOTYPE: $
3662 CODE:
3663 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3664 OUTPUT:
3665 RETVAL
3666
3667UV
3668rss (Coro::State coro)
3669 PROTOTYPE: $
3670 ALIAS:
3671 usecount = 1
3672 CODE:
3673 switch (ix)
3674 {
3675 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3676 case 1: RETVAL = coro->usecount; break;
3677 }
3678 OUTPUT:
3679 RETVAL
3680
3681void
3682force_cctx ()
3683 PROTOTYPE:
3684 CODE:
3685 cctx_current->idle_sp = 0;
3686
3687void
3688swap_defsv (Coro::State self)
3689 PROTOTYPE: $
3690 ALIAS:
3691 swap_defav = 1
3692 CODE:
3693 if (!self->slot)
3694 croak ("cannot swap state with coroutine that has no saved state,");
3695 else
3696 {
3697 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3698 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3699
3700 SV *tmp = *src; *src = *dst; *dst = tmp;
3701 }
3702
3703void
3704cancel (Coro::State self)
3705 CODE:
3706 coro_state_destroy (aTHX_ self);
3707
3708SV *
3709enable_times (int enabled = enable_times)
3710 CODE:
3711{
3712 RETVAL = boolSV (enable_times);
3713
3714 if (enabled != enable_times)
3715 {
3716 enable_times = enabled;
3717
3718 coro_times_update ();
3719 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3720 }
3721}
3722 OUTPUT:
3723 RETVAL
3724
3725void
3726times (Coro::State self)
3727 PPCODE:
3728{
3729 struct coro *current = SvSTATE (coro_current);
3730
3731 if (ecb_expect_false (current == self))
3732 {
3733 coro_times_update ();
3734 coro_times_add (SvSTATE (coro_current));
3735 }
3736
3737 EXTEND (SP, 2);
3738 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3739 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3740
3741 if (ecb_expect_false (current == self))
3742 coro_times_sub (SvSTATE (coro_current));
3743}
3744
3745void
3746swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3747 CODE:
3748{
3749 struct coro *current = SvSTATE_current;
3750
3751 if (current == coro)
3752 SWAP_SVS (current);
3753
3754 if (!coro->swap_sv)
3755 coro->swap_sv = newAV ();
3756
3757 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3758 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3759
3760 if (current == coro)
3761 SWAP_SVS (current);
3762}
3763
3764
1104MODULE = Coro::State PACKAGE = Coro 3765MODULE = Coro::State PACKAGE = Coro
1105 3766
1106BOOT: 3767BOOT:
1107{ 3768{
1108 int i; 3769 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3770 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3771 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3772 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3773 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3774 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3775 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3776 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1109 3777
3778 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3779 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3780 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3781 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3782
1110 coro_stash = gv_stashpv ("Coro", TRUE); 3783 coro_stash = gv_stashpv ("Coro", TRUE);
1111 3784
1112 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3785 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1113 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3786 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1114 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3787 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1115 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3788 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1116 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3789 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1117 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3790 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1118
1119 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1120 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1121
1122 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123 coro_ready[i] = newAV ();
1124 3791
1125 { 3792 {
1126 SV *sv = perl_get_sv("Coro::API", 1); 3793 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1127 3794
1128 coroapi.schedule = api_schedule; 3795 coroapi.schedule = api_schedule;
3796 coroapi.schedule_to = api_schedule_to;
1129 coroapi.cede = api_cede; 3797 coroapi.cede = api_cede;
3798 coroapi.cede_notself = api_cede_notself;
1130 coroapi.ready = api_ready; 3799 coroapi.ready = api_ready;
3800 coroapi.is_ready = api_is_ready;
1131 coroapi.nready = &coro_nready; 3801 coroapi.nready = coro_nready;
1132 coroapi.current = coro_current; 3802 coroapi.current = coro_current;
1133 3803
1134 GCoroAPI = &coroapi; 3804 /*GCoroAPI = &coroapi;*/
1135 sv_setiv (sv, (IV)&coroapi); 3805 sv_setiv (sv, (IV)&coroapi);
1136 SvREADONLY_on (sv); 3806 SvREADONLY_on (sv);
1137 } 3807 }
1138} 3808}
1139 3809
3810SV *
3811async (...)
3812 PROTOTYPE: &@
3813 CODE:
3814 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3815 api_ready (aTHX_ RETVAL);
3816 OUTPUT:
3817 RETVAL
3818
3819void
3820_destroy (Coro::State coro)
3821 CODE:
3822 /* used by the manager thread */
3823 coro_state_destroy (aTHX_ coro);
3824
3825void
3826on_destroy (Coro::State coro, SV *cb)
3827 CODE:
3828 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3829
3830void
3831join (...)
3832 CODE:
3833 CORO_EXECUTE_SLF_XS (slf_init_join);
3834
3835void
3836terminate (...)
3837 CODE:
3838 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3839
3840void
3841cancel (...)
3842 CODE:
3843 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3844
3845int
3846safe_cancel (Coro::State self, ...)
3847 C_ARGS: aTHX_ self, &ST (1), items - 1
3848
3849void
3850schedule (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3853
3854void
3855schedule_to (...)
3856 CODE:
3857 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3858
3859void
3860cede_to (...)
3861 CODE:
3862 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3863
3864void
3865cede (...)
3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_cede);
3868
3869void
3870cede_notself (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3873
3874void
3875_set_current (SV *current)
3876 PROTOTYPE: $
3877 CODE:
3878 SvREFCNT_dec (SvRV (coro_current));
3879 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3880
3881void
3882_set_readyhook (SV *hook)
3883 PROTOTYPE: $
3884 CODE:
3885 SvREFCNT_dec (coro_readyhook);
3886 SvGETMAGIC (hook);
3887 if (SvOK (hook))
3888 {
3889 coro_readyhook = newSVsv (hook);
3890 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3891 }
3892 else
3893 {
3894 coro_readyhook = 0;
3895 CORO_READYHOOK = 0;
3896 }
3897
1140int 3898int
1141prio (Coro::State coro, int newprio = 0) 3899prio (Coro::State coro, int newprio = 0)
3900 PROTOTYPE: $;$
1142 ALIAS: 3901 ALIAS:
1143 nice = 1 3902 nice = 1
1144 CODE: 3903 CODE:
1145{ 3904{
1146 RETVAL = coro->prio; 3905 RETVAL = coro->prio;
1147 3906
1148 if (items > 1) 3907 if (items > 1)
1149 { 3908 {
1150 if (ix) 3909 if (ix)
1151 newprio += coro->prio; 3910 newprio = coro->prio - newprio;
1152 3911
1153 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3912 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1154 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3913 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1155 3914
1156 coro->prio = newprio; 3915 coro->prio = newprio;
1157 } 3916 }
1158} 3917}
3918 OUTPUT:
3919 RETVAL
1159 3920
1160void 3921SV *
1161ready (SV *self) 3922ready (SV *self)
1162 PROTOTYPE: $ 3923 PROTOTYPE: $
1163 CODE: 3924 CODE:
1164 api_ready (self); 3925 RETVAL = boolSV (api_ready (aTHX_ self));
3926 OUTPUT:
3927 RETVAL
1165 3928
1166int 3929int
1167nready (...) 3930nready (...)
1168 PROTOTYPE: 3931 PROTOTYPE:
1169 CODE: 3932 CODE:
1170 RETVAL = coro_nready; 3933 RETVAL = coro_nready;
1171 OUTPUT: 3934 OUTPUT:
1172 RETVAL 3935 RETVAL
1173 3936
1174MODULE = Coro::State PACKAGE = Coro::AIO 3937void
3938suspend (Coro::State self)
3939 PROTOTYPE: $
3940 CODE:
3941 self->flags |= CF_SUSPENDED;
3942
3943void
3944resume (Coro::State self)
3945 PROTOTYPE: $
3946 CODE:
3947 self->flags &= ~CF_SUSPENDED;
3948
3949void
3950_pool_handler (...)
3951 CODE:
3952 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3953
3954void
3955async_pool (SV *cv, ...)
3956 PROTOTYPE: &@
3957 PPCODE:
3958{
3959 HV *hv = (HV *)av_pop (av_async_pool);
3960 AV *av = newAV ();
3961 SV *cb = ST (0);
3962 int i;
3963
3964 av_extend (av, items - 2);
3965 for (i = 1; i < items; ++i)
3966 av_push (av, SvREFCNT_inc_NN (ST (i)));
3967
3968 if ((SV *)hv == &PL_sv_undef)
3969 {
3970 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3971 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3972 SvREFCNT_dec (sv);
3973 }
3974
3975 {
3976 struct coro *coro = SvSTATE_hv (hv);
3977
3978 assert (!coro->invoke_cb);
3979 assert (!coro->invoke_av);
3980 coro->invoke_cb = SvREFCNT_inc (cb);
3981 coro->invoke_av = av;
3982 }
3983
3984 api_ready (aTHX_ (SV *)hv);
3985
3986 if (GIMME_V != G_VOID)
3987 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3988 else
3989 SvREFCNT_dec (hv);
3990}
1175 3991
1176SV * 3992SV *
1177_get_state () 3993rouse_cb ()
3994 PROTOTYPE:
1178 CODE: 3995 CODE:
1179{ 3996 RETVAL = coro_new_rouse_cb (aTHX);
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT: 3997 OUTPUT:
1195 RETVAL 3998 RETVAL
1196 3999
1197void 4000void
1198_set_state (char *data_) 4001rouse_wait (...)
4002 PROTOTYPE: ;$
4003 PPCODE:
4004 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4005
4006void
4007on_enter (SV *block)
4008 ALIAS:
4009 on_leave = 1
1199 PROTOTYPE: $ 4010 PROTOTYPE: &
1200 CODE: 4011 CODE:
1201{ 4012{
1202 struct { 4013 struct coro *coro = SvSTATE_current;
4014 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4015
4016 block = s_get_cv_croak (block);
4017
4018 if (!*avp)
4019 *avp = newAV ();
4020
4021 av_push (*avp, SvREFCNT_inc (block));
4022
4023 if (!ix)
4024 on_enterleave_call (aTHX_ block);
4025
4026 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4027 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4028 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4029}
4030
4031
4032MODULE = Coro::State PACKAGE = PerlIO::cede
4033
4034BOOT:
4035 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4036
4037
4038MODULE = Coro::State PACKAGE = Coro::Semaphore
4039
4040SV *
4041new (SV *klass, SV *count = 0)
4042 CODE:
4043{
4044 int semcnt = 1;
4045
4046 if (count)
4047 {
4048 SvGETMAGIC (count);
4049
4050 if (SvOK (count))
4051 semcnt = SvIV (count);
4052 }
4053
4054 RETVAL = sv_bless (
4055 coro_waitarray_new (aTHX_ semcnt),
4056 GvSTASH (CvGV (cv))
4057 );
4058}
4059 OUTPUT:
4060 RETVAL
4061
4062# helper for Coro::Channel and others
4063SV *
4064_alloc (int count)
4065 CODE:
4066 RETVAL = coro_waitarray_new (aTHX_ count);
4067 OUTPUT:
4068 RETVAL
4069
4070SV *
4071count (SV *self)
4072 CODE:
4073 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4074 OUTPUT:
4075 RETVAL
4076
4077void
4078up (SV *self, int adjust = 1)
4079 ALIAS:
4080 adjust = 1
4081 CODE:
4082 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4083
4084void
4085down (...)
4086 CODE:
4087 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4088
4089void
4090wait (...)
4091 CODE:
4092 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4093
4094void
4095try (SV *self)
4096 PPCODE:
4097{
4098 AV *av = (AV *)SvRV (self);
4099 SV *count_sv = AvARRAY (av)[0];
4100 IV count = SvIVX (count_sv);
4101
4102 if (count > 0)
4103 {
4104 --count;
4105 SvIVX (count_sv) = count;
4106 XSRETURN_YES;
4107 }
4108 else
4109 XSRETURN_NO;
4110}
4111
4112void
4113waiters (SV *self)
4114 PPCODE:
4115{
4116 AV *av = (AV *)SvRV (self);
4117 int wcount = AvFILLp (av) + 1 - 1;
4118
4119 if (GIMME_V == G_SCALAR)
4120 XPUSHs (sv_2mortal (newSViv (wcount)));
4121 else
4122 {
1203 int errorno; 4123 int i;
1204 int laststype; 4124 EXTEND (SP, wcount);
1205 int laststatval; 4125 for (i = 1; i <= wcount; ++i)
1206 Stat_t statcache; 4126 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1207 } *data = (void *)data_; 4127 }
1208
1209 errno = data->errorno;
1210 PL_laststype = data->laststype;
1211 PL_laststatval = data->laststatval;
1212 PL_statcache = data->statcache;
1213} 4128}
4129
4130MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4131
4132void
4133_may_delete (SV *sem, int count, unsigned int extra_refs)
4134 PPCODE:
4135{
4136 AV *av = (AV *)SvRV (sem);
4137
4138 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4139 && AvFILLp (av) == 0 /* no waiters, just count */
4140 && SvIV (AvARRAY (av)[0]) == count)
4141 XSRETURN_YES;
4142
4143 XSRETURN_NO;
4144}
4145
4146MODULE = Coro::State PACKAGE = Coro::Signal
4147
4148SV *
4149new (SV *klass)
4150 CODE:
4151 RETVAL = sv_bless (
4152 coro_waitarray_new (aTHX_ 0),
4153 GvSTASH (CvGV (cv))
4154 );
4155 OUTPUT:
4156 RETVAL
4157
4158void
4159wait (...)
4160 CODE:
4161 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4162
4163void
4164broadcast (SV *self)
4165 CODE:
4166{
4167 AV *av = (AV *)SvRV (self);
4168 coro_signal_wake (aTHX_ av, AvFILLp (av));
4169}
4170
4171void
4172send (SV *self)
4173 CODE:
4174{
4175 AV *av = (AV *)SvRV (self);
4176
4177 if (AvFILLp (av))
4178 coro_signal_wake (aTHX_ av, 1);
4179 else
4180 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4181}
4182
4183IV
4184awaited (SV *self)
4185 CODE:
4186 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4187 OUTPUT:
4188 RETVAL
4189
4190
4191MODULE = Coro::State PACKAGE = Coro::AnyEvent
4192
4193BOOT:
4194 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4195
4196void
4197_schedule (...)
4198 CODE:
4199{
4200 static int incede;
4201
4202 api_cede_notself (aTHX);
4203
4204 ++incede;
4205 while (coro_nready >= incede && api_cede (aTHX))
4206 ;
4207
4208 sv_setsv (sv_activity, &PL_sv_undef);
4209 if (coro_nready >= incede)
4210 {
4211 PUSHMARK (SP);
4212 PUTBACK;
4213 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4214 }
4215
4216 --incede;
4217}
4218
4219
4220MODULE = Coro::State PACKAGE = Coro::AIO
4221
4222void
4223_register (char *target, char *proto, SV *req)
4224 CODE:
4225{
4226 SV *req_cv = s_get_cv_croak (req);
4227 /* newXSproto doesn't return the CV on 5.8 */
4228 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4229 sv_setpv ((SV *)slf_cv, proto);
4230 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4231}
4232
4233MODULE = Coro::State PACKAGE = Coro::Select
4234
4235void
4236patch_pp_sselect ()
4237 CODE:
4238 if (!coro_old_pp_sselect)
4239 {
4240 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4241 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4242 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4243 }
4244
4245void
4246unpatch_pp_sselect ()
4247 CODE:
4248 if (coro_old_pp_sselect)
4249 {
4250 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4251 coro_old_pp_sselect = 0;
4252 }
4253
4254MODULE = Coro::State PACKAGE = Coro::Util
4255
4256void
4257_exit (int code)
4258 CODE:
4259 _exit (code);
4260
4261NV
4262time ()
4263 CODE:
4264 RETVAL = nvtime (aTHX);
4265 OUTPUT:
4266 RETVAL
4267
4268NV
4269gettimeofday ()
4270 PPCODE:
4271{
4272 UV tv [2];
4273 u2time (aTHX_ tv);
4274 EXTEND (SP, 2);
4275 PUSHs (sv_2mortal (newSVuv (tv [0])));
4276 PUSHs (sv_2mortal (newSVuv (tv [1])));
4277}
4278

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