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Comparing Coro/Coro/State.xs (file contents):
Revision 1.128 by root, Fri Dec 22 04:22:28 2006 UTC vs.
Revision 1.411 by root, Mon Jun 13 08:38:15 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
8 18
19#include <stddef.h>
9#include <stdio.h> 20#include <stdio.h>
10#include <errno.h> 21#include <errno.h>
11#include <assert.h> 22#include <assert.h>
12 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
37
13#ifdef HAVE_MMAP 38#if HAVE_MMAP
14# include <unistd.h> 39# include <unistd.h>
15# include <sys/mman.h> 40# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON 42# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
31#else 56#else
32# define PAGESIZE 0 57# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
34#endif 59#endif
35 60
36#if USE_VALGRIND 61#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
38#endif 63#endif
39 64
40/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
42 67
43#define PERL_VERSION_ATLEAST(a,b,c) \ 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44 (PERL_REVISION > (a) \ 69# undef CORO_STACKGUARD
45 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48
49#if !PERL_VERSION_ATLEAST (5,6,0)
50# ifndef PL_ppaddr
51# define PL_ppaddr ppaddr
52# endif 70#endif
53# ifndef call_sv 71
54# define call_sv perl_call_sv 72#ifndef CORO_STACKGUARD
73# define CORO_STACKGUARD 0
55# endif 74#endif
56# ifndef get_sv 75
57# define get_sv perl_get_sv 76/* prefer perl internal functions over our own? */
77#ifndef CORO_PREFER_PERL_FUNCTIONS
78# define CORO_PREFER_PERL_FUNCTIONS 0
58# endif 79#endif
59# ifndef get_cv 80
60# define get_cv perl_get_cv 81/* The next macros try to return the current stack pointer, in an as
82 * portable way as possible. */
83#if __GNUC__ >= 4
84# define dSTACKLEVEL int stacklevel_dummy
85# define STACKLEVEL __builtin_frame_address (0)
86#else
87# define dSTACKLEVEL volatile void *stacklevel
88# define STACKLEVEL ((void *)&stacklevel)
61# endif 89#endif
62# ifndef IS_PADGV 90
63# define IS_PADGV(v) 0 91#define IN_DESTRUCT PL_dirty
64# endif 92
65# ifndef IS_PADCONST 93#include "CoroAPI.h"
66# define IS_PADCONST(v) 0 94#define GCoroAPI (&coroapi) /* very sneaky */
95
96#ifdef USE_ITHREADS
97# if CORO_PTHREAD
98static void *coro_thx;
67# endif 99# endif
68#endif 100#endif
69 101
70/* 5.8.7 */ 102/* used in state.h */
71#ifndef SvRV_set 103#define VAR(name,type) VARx(name, PL_ ## name, type)
72# define SvRV_set(s,v) SvRV(s) = (v) 104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
73#endif 113#endif
74 114
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115static double (*nvtime)(); /* so why doesn't it take void? */
76# undef STACKGUARD 116static void (*u2time)(pTHX_ UV ret[2]);
77#endif
78 117
79#ifndef STACKGUARD 118/* we hijack an hopefully unused CV flag for our purposes */
80# define STACKGUARD 0 119#define CVf_SLF 0x4000
81#endif 120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
82 122
83/* prefer perl internal functions over our own? */ 123static U32 cctx_gen;
84#ifndef PREFER_PERL_FUNCTIONS 124static size_t cctx_stacksize = CORO_STACKSIZE;
85# define PREFER_PERL_FUNCTIONS 0
86#endif
87
88/* The next macro should declare a variable stacklevel that contains and approximation
89 * to the current C stack pointer. Its property is that it changes with each call
90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
92#define STACKLEVEL ((void *)&stacklevel)
93
94#define IN_DESTRUCT (PL_main_cv == Nullcv)
95
96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98#else
99# define attribute(x)
100#endif
101
102#define NOINLINE attribute ((noinline))
103
104#include "CoroAPI.h"
105
106#ifdef USE_ITHREADS
107static perl_mutex coro_mutex;
108# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
109# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
110#else
111# define LOCK (void)0
112# define UNLOCK (void)0
113#endif
114
115struct io_state
116{
117 int errorno;
118 I32 laststype;
119 int laststatval;
120 Stat_t statcache;
121};
122
123static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
124static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
127static JMPENV *main_top_env;
125static HV *coro_state_stash, *coro_stash; 128static HV *coro_state_stash, *coro_stash;
126static SV *coro_mortal; /* will be freed after next transfer */ 129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
130
131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
134
135static GV *irsgv; /* $/ */
136static GV *stdoutgv; /* *STDOUT */
137static SV *rv_diehook;
138static SV *rv_warnhook;
139static HV *hv_sig; /* %SIG */
140
141/* async_pool helper stuff */
142static SV *sv_pool_rss;
143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
127 157
128static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
129static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
130 160
161enum
162{
163 CC_MAPPED = 0x01,
164 CC_NOREUSE = 0x02, /* throw this away after tracing */
165 CC_TRACE = 0x04,
166 CC_TRACE_SUB = 0x08, /* trace sub calls */
167 CC_TRACE_LINE = 0x10, /* trace each statement */
168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
169};
170
131/* this is a structure representing a c-level coroutine */ 171/* this is a structure representing a c-level coroutine */
132typedef struct coro_cctx { 172typedef struct coro_cctx
173{
133 struct coro_cctx *next; 174 struct coro_cctx *next;
134 175
135 /* the stack */ 176 /* the stack */
136 void *sptr; 177 void *sptr;
137 long ssize; /* positive == mmap, otherwise malloc */ 178 size_t ssize;
138 179
139 /* cpu state */ 180 /* cpu state */
140 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 181 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
182 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141 JMPENV *top_env; 183 JMPENV *top_env;
142 coro_context cctx; 184 coro_context cctx;
143 185
144 int inuse; 186 U32 gen;
145
146#if USE_VALGRIND 187#if CORO_USE_VALGRIND
147 int valgrind_id; 188 int valgrind_id;
148#endif 189#endif
190 unsigned char flags;
149} coro_cctx; 191} coro_cctx;
150 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
151enum { 199enum
200{
152 CF_RUNNING = 0x0001, /* coroutine is running */ 201 CF_RUNNING = 0x0001, /* coroutine is running */
153 CF_READY = 0x0002, /* coroutine is ready */ 202 CF_READY = 0x0002, /* coroutine is ready */
154 CF_NEW = 0x0004, /* ahs never been switched to */ 203 CF_NEW = 0x0004, /* has never been switched to */
204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
155}; 207};
156 208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212#define VARx(name,expr,type) type name;
213# include "state.h"
214#undef VARx
215} perl_slots;
216
217/* how many context stack entries do we need for perl_slots */
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219
157/* this is a structure representing a perl-level coroutine */ 220/* this is a structure representing a perl-level coroutine */
158struct coro { 221struct coro
222{
159 /* the c coroutine allocated to this perl coroutine, if any */ 223 /* the C coroutine allocated to this perl coroutine, if any */
160 coro_cctx *cctx; 224 coro_cctx *cctx;
161 225
226 /* ready queue */
227 struct coro *next_ready;
228
229 /* state data */
230 struct CoroSLF slf_frame; /* saved slf frame */
231 AV *mainstack;
232 perl_slots *slot; /* basically the saved sp */
233
234 CV *startcv; /* the CV to execute */
162 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
163 AV *args;
164 int refcnt;
165 int save; /* CORO_SAVE flags */
166 int flags; /* CF_ flags */ 236 int flags; /* CF_ flags */
237 HV *hv; /* the perl hash associated with this coro, if any */
167 238
168 /* optionally saved, might be zero */ 239 /* statistics */
169 AV *defav; /* @_ */ 240 int usecount; /* number of transfers to this coro */
170 SV *defsv; /* $_ */
171 SV *errsv; /* $@ */
172 SV *irssv; /* $/ */
173 SV *irssv_sv; /* real $/ cache */
174
175#define VAR(name,type) type name;
176# include "state.h"
177#undef VAR
178 241
179 /* coro process data */ 242 /* coro process data */
180 int prio; 243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
248
249 /* async_pool */
250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
263
264 /* linked list */
265 struct coro *next, *prev;
181}; 266};
182 267
183typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
184typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
185 270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275
276/** Coro ********************************************************************/
277
278#define CORO_PRIO_MAX 3
279#define CORO_PRIO_HIGH 1
280#define CORO_PRIO_NORMAL 0
281#define CORO_PRIO_LOW -1
282#define CORO_PRIO_IDLE -3
283#define CORO_PRIO_MIN -4
284
285/* for Coro.pm */
286static SV *coro_current;
287static SV *coro_readyhook;
288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 /* APPLE doesn't have HAVE_MMAP though */
297 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
298 #ifndef CORO_JIT_TYPE
299 #if __x86_64 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "amd64-unix"
301 #elif __i386 && CORO_JIT_UNIXY
302 #define CORO_JIT_TYPE "x86-unix"
303 #endif
304 #endif
305#endif
306
307#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
308 #undef CORO_JIT
309#endif
310
311#if CORO_JIT
312 typedef void (*load_save_perl_slots_type)(perl_slots *);
313 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
314#endif
315
316/** Coro::Select ************************************************************/
317
318static OP *(*coro_old_pp_sselect) (pTHX);
319static SV *coro_select_select;
320
321/* horrible hack, but if it works... */
186static AV * 322static OP *
323coro_pp_sselect (pTHX)
324{
325 dSP;
326 PUSHMARK (SP - 4); /* fake argument list */
327 XPUSHs (coro_select_select);
328 PUTBACK;
329
330 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
331 PL_op->op_flags |= OPf_STACKED;
332 PL_op->op_private = 0;
333 return PL_ppaddr [OP_ENTERSUB](aTHX);
334}
335
336/** time stuff **************************************************************/
337
338#ifdef HAS_GETTIMEOFDAY
339
340ECB_INLINE void
341coro_u2time (pTHX_ UV ret[2])
342{
343 struct timeval tv;
344 gettimeofday (&tv, 0);
345
346 ret [0] = tv.tv_sec;
347 ret [1] = tv.tv_usec;
348}
349
350ECB_INLINE double
351coro_nvtime (void)
352{
353 struct timeval tv;
354 gettimeofday (&tv, 0);
355
356 return tv.tv_sec + tv.tv_usec * 1e-6;
357}
358
359ECB_INLINE void
360time_init (pTHX)
361{
362 nvtime = coro_nvtime;
363 u2time = coro_u2time;
364}
365
366#else
367
368ECB_INLINE void
369time_init (pTHX)
370{
371 SV **svp;
372
373 require_pv ("Time/HiRes.pm");
374
375 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
376
377 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
378 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
379
380 nvtime = INT2PTR (double (*)(), SvIV (*svp));
381
382 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
383 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
384}
385
386#endif
387
388/** lowlevel stuff **********************************************************/
389
390static SV * ecb_noinline
391coro_get_sv (pTHX_ const char *name, int create)
392{
393#if PERL_VERSION_ATLEAST (5,10,0)
394 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
395 get_sv (name, create);
396#endif
397 return get_sv (name, create);
398}
399
400static AV * ecb_noinline
401coro_get_av (pTHX_ const char *name, int create)
402{
403#if PERL_VERSION_ATLEAST (5,10,0)
404 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
405 get_av (name, create);
406#endif
407 return get_av (name, create);
408}
409
410static HV * ecb_noinline
411coro_get_hv (pTHX_ const char *name, int create)
412{
413#if PERL_VERSION_ATLEAST (5,10,0)
414 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
415 get_hv (name, create);
416#endif
417 return get_hv (name, create);
418}
419
420ECB_INLINE void
421coro_times_update (void)
422{
423#ifdef coro_clock_gettime
424 struct timespec ts;
425
426 ts.tv_sec = ts.tv_nsec = 0;
427 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
428 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
432 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
433#else
434 dTHX;
435 UV tv[2];
436
437 u2time (aTHX_ tv);
438 time_real [0] = tv [0];
439 time_real [1] = tv [1] * 1000;
440#endif
441}
442
443ECB_INLINE void
444coro_times_add (struct coro *c)
445{
446 c->t_real [1] += time_real [1];
447 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
448 c->t_real [0] += time_real [0];
449
450 c->t_cpu [1] += time_cpu [1];
451 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
452 c->t_cpu [0] += time_cpu [0];
453}
454
455ECB_INLINE void
456coro_times_sub (struct coro *c)
457{
458 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
459 c->t_real [1] -= time_real [1];
460 c->t_real [0] -= time_real [0];
461
462 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
463 c->t_cpu [1] -= time_cpu [1];
464 c->t_cpu [0] -= time_cpu [0];
465}
466
467/*****************************************************************************/
468/* magic glue */
469
470#define CORO_MAGIC_type_cv 26
471#define CORO_MAGIC_type_state PERL_MAGIC_ext
472
473#define CORO_MAGIC_NN(sv, type) \
474 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
475 ? SvMAGIC (sv) \
476 : mg_find (sv, type))
477
478#define CORO_MAGIC(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)) \
480 ? CORO_MAGIC_NN (sv, type) \
481 : 0)
482
483#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
484#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
485
486ECB_INLINE MAGIC *
487SvSTATEhv_p (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (ecb_expect_true (
492 SvTYPE (coro) == SVt_PVHV
493 && (mg = CORO_MAGIC_state (coro))
494 && mg->mg_virtual == &coro_state_vtbl
495 ))
496 return mg;
497
498 return 0;
499}
500
501ECB_INLINE struct coro *
502SvSTATE_ (pTHX_ SV *coro)
503{
504 MAGIC *mg;
505
506 if (SvROK (coro))
507 coro = SvRV (coro);
508
509 mg = SvSTATEhv_p (aTHX_ coro);
510 if (!mg)
511 croak ("Coro::State object required");
512
513 return (struct coro *)mg->mg_ptr;
514}
515
516#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
517
518/* faster than SvSTATE, but expects a coroutine hv */
519#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
520#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
521
522/*****************************************************************************/
523/* padlist management and caching */
524
525ECB_INLINE AV *
187coro_clone_padlist (CV *cv) 526coro_derive_padlist (pTHX_ CV *cv)
188{ 527{
189 AV *padlist = CvPADLIST (cv); 528 AV *padlist = CvPADLIST (cv);
190 AV *newpadlist, *newpad; 529 AV *newpadlist, *newpad;
191 530
192 newpadlist = newAV (); 531 newpadlist = newAV ();
193 AvREAL_off (newpadlist); 532 AvREAL_off (newpadlist);
194#if PERL_VERSION_ATLEAST (5,9,0) 533#if PERL_VERSION_ATLEAST (5,10,0)
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
196#else 535#else
197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 536 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
198#endif 537#endif
199 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 538 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
200 --AvFILLp (padlist); 539 --AvFILLp (padlist);
201 540
202 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 541 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
203 av_store (newpadlist, 1, (SV *)newpad); 542 av_store (newpadlist, 1, (SV *)newpad);
204 543
205 return newpadlist; 544 return newpadlist;
206} 545}
207 546
208static void 547ECB_INLINE void
209free_padlist (AV *padlist) 548free_padlist (pTHX_ AV *padlist)
210{ 549{
211 /* may be during global destruction */ 550 /* may be during global destruction */
212 if (SvREFCNT (padlist)) 551 if (!IN_DESTRUCT)
213 { 552 {
214 I32 i = AvFILLp (padlist); 553 I32 i = AvFILLp (padlist);
215 while (i >= 0) 554
555 while (i > 0) /* special-case index 0 */
216 { 556 {
217 SV **svp = av_fetch (padlist, i--, FALSE); 557 /* we try to be extra-careful here */
218 if (svp) 558 AV *av = (AV *)AvARRAY (padlist)[i--];
219 { 559 I32 j = AvFILLp (av);
220 SV *sv; 560
221 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 561 while (j >= 0)
562 SvREFCNT_dec (AvARRAY (av)[j--]);
563
564 AvFILLp (av) = -1;
222 SvREFCNT_dec (sv); 565 SvREFCNT_dec (av);
223
224 SvREFCNT_dec (*svp);
225 }
226 } 566 }
227 567
568 SvREFCNT_dec (AvARRAY (padlist)[0]);
569
570 AvFILLp (padlist) = -1;
228 SvREFCNT_dec ((SV*)padlist); 571 SvREFCNT_dec ((SV*)padlist);
229 } 572 }
230} 573}
231 574
232static int 575static int
233coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 576coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
234{ 577{
235 AV *padlist; 578 AV *padlist;
236 AV *av = (AV *)mg->mg_obj; 579 AV *av = (AV *)mg->mg_obj;
237 580
581 /* perl manages to free our internal AV and _then_ call us */
582 if (IN_DESTRUCT)
583 return 0;
584
238 /* casting is fun. */ 585 /* casting is fun. */
239 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 586 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240 free_padlist (padlist); 587 free_padlist (aTHX_ padlist);
241 588
242 SvREFCNT_dec (av); 589 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
243 590
244 return 0; 591 return 0;
245} 592}
246 593
247#define PERL_MAGIC_coro PERL_MAGIC_ext 594static MGVTBL coro_cv_vtbl = {
248 595 0, 0, 0, 0,
249static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 596 coro_cv_free
250 597};
251#define CORO_MAGIC(cv) \
252 SvMAGIC (cv) \
253 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254 ? SvMAGIC (cv) \
255 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
256 : 0
257 598
258/* the next two functions merely cache the padlists */ 599/* the next two functions merely cache the padlists */
259static void 600ECB_INLINE void
260get_padlist (CV *cv) 601get_padlist (pTHX_ CV *cv)
261{ 602{
262 MAGIC *mg = CORO_MAGIC (cv); 603 MAGIC *mg = CORO_MAGIC_cv (cv);
263 AV *av; 604 AV *av;
264 605
265 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 606 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 607 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267 else 608 else
268 { 609 {
269#if PREFER_PERL_FUNCTIONS 610#if CORO_PREFER_PERL_FUNCTIONS
270 /* this is probably cleaner, but also slower? */ 611 /* this is probably cleaner? but also slower! */
612 /* in practise, it seems to be less stable */
271 CV *cp = Perl_cv_clone (cv); 613 CV *cp = Perl_cv_clone (aTHX_ cv);
272 CvPADLIST (cv) = CvPADLIST (cp); 614 CvPADLIST (cv) = CvPADLIST (cp);
273 CvPADLIST (cp) = 0; 615 CvPADLIST (cp) = 0;
274 SvREFCNT_dec (cp); 616 SvREFCNT_dec (cp);
275#else 617#else
276 CvPADLIST (cv) = coro_clone_padlist (cv); 618 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
277#endif 619#endif
278 } 620 }
279} 621}
280 622
281static void 623ECB_INLINE void
282put_padlist (CV *cv) 624put_padlist (pTHX_ CV *cv)
283{ 625{
284 MAGIC *mg = CORO_MAGIC (cv); 626 MAGIC *mg = CORO_MAGIC_cv (cv);
285 AV *av; 627 AV *av;
286 628
287 if (!mg) 629 if (ecb_expect_false (!mg))
288 { 630 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
289 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291 mg->mg_virtual = &vtbl_coro;
292 mg->mg_obj = (SV *)newAV ();
293 }
294 631
295 av = (AV *)mg->mg_obj; 632 av = (AV *)mg->mg_obj;
296 633
297 if (AvFILLp (av) >= AvMAX (av)) 634 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
298 av_extend (av, AvMAX (av) + 1); 635 av_extend (av, AvFILLp (av) + 1);
299 636
300 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 637 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301} 638}
302 639
303#define SB do { 640/** load & save, init *******************************************************/
304#define SE } while (0)
305 641
306#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 642/* swap sv heads, at least logically */
307
308static void 643static void
644swap_svs (pTHX_ Coro__State c)
645{
646 int i;
647
648 for (i = 0; i <= AvFILLp (c->swap_sv); )
649 {
650 SV *a = AvARRAY (c->swap_sv)[i++];
651 SV *b = AvARRAY (c->swap_sv)[i++];
652
653 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
654 SV tmp;
655
656 /* swap sv_any */
657 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
658
659 /* swap sv_flags */
660 SvFLAGS (&tmp) = SvFLAGS (a);
661 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
662 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
663
664#if PERL_VERSION_ATLEAST (5,10,0)
665 /* perl 5.10 complicates this _quite_ a bit, but it also is
666 * much faster, so no quarrels here. alternatively, we could
667 * sv_upgrade to avoid this.
668 */
669 {
670 /* swap sv_u */
671 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
672
673 /* if SvANY points to the head, we need to adjust the pointers,
674 * as the pointer for a still points to b, and maybe vice versa.
675 */
676 #define svany_in_head(type) \
677 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
678
679 if (svany_in_head (SvTYPE (a)))
680 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
681
682 if (svany_in_head (SvTYPE (b)))
683 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
684 }
685#endif
686 }
687}
688
689#define SWAP_SVS(coro) \
690 if (ecb_expect_false ((coro)->swap_sv)) \
691 swap_svs (aTHX_ (coro))
692
693static void
694on_enterleave_call (pTHX_ SV *cb);
695
696static void
309load_perl (Coro__State c) 697load_perl (pTHX_ Coro__State c)
310{ 698{
311#define VAR(name,type) PL_ ## name = c->name; 699 perl_slots *slot = c->slot;
700 c->slot = 0;
701
702 PL_mainstack = c->mainstack;
703
704#if CORO_JIT
705 load_perl_slots (slot);
706#else
707 #define VARx(name,expr,type) expr = slot->name;
312# include "state.h" 708 # include "state.h"
313#undef VAR 709 #undef VARx
314 710#endif
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318 if (c->irssv)
319 {
320 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321 SvREFCNT_dec (c->irssv);
322 else
323 {
324 REPLACE_SV (PL_rs, c->irssv);
325 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326 sv_setsv (c->irssv_sv, PL_rs);
327 }
328 }
329 711
330 { 712 {
331 dSP; 713 dSP;
714
332 CV *cv; 715 CV *cv;
333 716
334 /* now do the ugly restore mess */ 717 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 718 while (ecb_expect_true (cv = (CV *)POPs))
336 { 719 {
337 put_padlist (cv); /* mark this padlist as available */ 720 put_padlist (aTHX_ cv); /* mark this padlist as available */
338 CvDEPTH (cv) = PTR2IV (POPs); 721 CvDEPTH (cv) = PTR2IV (POPs);
339 CvPADLIST (cv) = (AV *)POPs; 722 CvPADLIST (cv) = (AV *)POPs;
340 } 723 }
341 724
342 PUTBACK; 725 PUTBACK;
343 } 726 }
344}
345 727
728 slf_frame = c->slf_frame;
729 CORO_THROW = c->except;
730
731 if (ecb_expect_false (enable_times))
732 {
733 if (ecb_expect_false (!times_valid))
734 coro_times_update ();
735
736 coro_times_sub (c);
737 }
738
739 if (ecb_expect_false (c->on_enter))
740 {
741 int i;
742
743 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
744 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
745 }
746
747 SWAP_SVS (c);
748}
749
346static void 750static void
347save_perl (Coro__State c) 751save_perl (pTHX_ Coro__State c)
348{ 752{
753 SWAP_SVS (c);
754
755 if (ecb_expect_false (c->on_leave))
756 {
757 int i;
758
759 for (i = AvFILLp (c->on_leave); i >= 0; --i)
760 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
761 }
762
763 times_valid = 0;
764
765 if (ecb_expect_false (enable_times))
766 {
767 coro_times_update (); times_valid = 1;
768 coro_times_add (c);
769 }
770
771 c->except = CORO_THROW;
772 c->slf_frame = slf_frame;
773
349 { 774 {
350 dSP; 775 dSP;
351 I32 cxix = cxstack_ix; 776 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 777 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 778 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 780 /*
356 * the worst thing you can imagine happens first - we have to save 781 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 782 * (and reinitialize) all cv's in the whole callchain :(
358 */ 783 */
359 784
360 EXTEND (SP, 3 + 1);
361 PUSHs (Nullsv); 785 XPUSHs (Nullsv);
362 /* this loop was inspired by pp_caller */ 786 /* this loop was inspired by pp_caller */
363 for (;;) 787 for (;;)
364 { 788 {
365 while (cxix >= 0) 789 while (ecb_expect_true (cxix >= 0))
366 { 790 {
367 PERL_CONTEXT *cx = &ccstk[cxix--]; 791 PERL_CONTEXT *cx = &ccstk[cxix--];
368 792
369 if (CxTYPE (cx) == CXt_SUB) 793 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
370 { 794 {
371 CV *cv = cx->blk_sub.cv; 795 CV *cv = cx->blk_sub.cv;
372 796
373 if (CvDEPTH (cv)) 797 if (ecb_expect_true (CvDEPTH (cv)))
374 { 798 {
375 EXTEND (SP, 3); 799 EXTEND (SP, 3);
376 PUSHs ((SV *)CvPADLIST (cv)); 800 PUSHs ((SV *)CvPADLIST (cv));
377 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 801 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
378 PUSHs ((SV *)cv); 802 PUSHs ((SV *)cv);
379 803
380 CvDEPTH (cv) = 0; 804 CvDEPTH (cv) = 0;
381 get_padlist (cv); 805 get_padlist (aTHX_ cv);
382 } 806 }
383 } 807 }
384 } 808 }
385 809
386 if (top_si->si_type == PERLSI_MAIN) 810 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
387 break; 811 break;
388 812
389 top_si = top_si->si_prev; 813 top_si = top_si->si_prev;
390 ccstk = top_si->si_cxstack; 814 ccstk = top_si->si_cxstack;
391 cxix = top_si->si_cxix; 815 cxix = top_si->si_cxix;
392 } 816 }
393 817
394 PUTBACK; 818 PUTBACK;
395 } 819 }
396 820
397 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 821 /* allocate some space on the context stack for our purposes */
398 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 822 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
399 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 823 {
400 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 824 unsigned int i;
401 825
402#define VAR(name,type)c->name = PL_ ## name; 826 for (i = 0; i < SLOT_COUNT; ++i)
827 CXINC;
828
829 cxstack_ix -= SLOT_COUNT; /* undo allocation */
830 }
831
832 c->mainstack = PL_mainstack;
833
834 {
835 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
836
837#if CORO_JIT
838 save_perl_slots (slot);
839#else
840 #define VARx(name,expr,type) slot->name = expr;
403# include "state.h" 841 # include "state.h"
404#undef VAR 842 #undef VARx
843#endif
844 }
405} 845}
406 846
407/* 847/*
408 * allocate various perl stacks. This is an exact copy 848 * allocate various perl stacks. This is almost an exact copy
409 * of perl.c:init_stacks, except that it uses less memory 849 * of perl.c:init_stacks, except that it uses less memory
410 * on the (sometimes correct) assumption that coroutines do 850 * on the (sometimes correct) assumption that coroutines do
411 * not usually need a lot of stackspace. 851 * not usually need a lot of stackspace.
412 */ 852 */
413#if PREFER_PERL_FUNCTIONS 853#if CORO_PREFER_PERL_FUNCTIONS
414# define coro_init_stacks init_stacks 854# define coro_init_stacks(thx) init_stacks ()
415#else 855#else
416static void 856static void
417coro_init_stacks () 857coro_init_stacks (pTHX)
418{ 858{
419 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 859 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
420 PL_curstackinfo->si_type = PERLSI_MAIN; 860 PL_curstackinfo->si_type = PERLSI_MAIN;
421 PL_curstack = PL_curstackinfo->si_stack; 861 PL_curstack = PL_curstackinfo->si_stack;
422 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 862 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423 863
424 PL_stack_base = AvARRAY(PL_curstack); 864 PL_stack_base = AvARRAY(PL_curstack);
425 PL_stack_sp = PL_stack_base; 865 PL_stack_sp = PL_stack_base;
426 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 866 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427 867
428 New(50,PL_tmps_stack,128,SV*); 868 New(50,PL_tmps_stack,32,SV*);
429 PL_tmps_floor = -1; 869 PL_tmps_floor = -1;
430 PL_tmps_ix = -1; 870 PL_tmps_ix = -1;
431 PL_tmps_max = 128; 871 PL_tmps_max = 32;
432 872
433 New(54,PL_markstack,32,I32); 873 New(54,PL_markstack,16,I32);
434 PL_markstack_ptr = PL_markstack; 874 PL_markstack_ptr = PL_markstack;
435 PL_markstack_max = PL_markstack + 32; 875 PL_markstack_max = PL_markstack + 16;
436 876
437#ifdef SET_MARK_OFFSET 877#ifdef SET_MARK_OFFSET
438 SET_MARK_OFFSET; 878 SET_MARK_OFFSET;
439#endif 879#endif
440 880
441 New(54,PL_scopestack,32,I32); 881 New(54,PL_scopestack,8,I32);
442 PL_scopestack_ix = 0; 882 PL_scopestack_ix = 0;
443 PL_scopestack_max = 32; 883 PL_scopestack_max = 8;
444 884
445 New(54,PL_savestack,64,ANY); 885 New(54,PL_savestack,24,ANY);
446 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
447 PL_savestack_max = 64; 887 PL_savestack_max = 24;
448 888
449#if !PERL_VERSION_ATLEAST (5,9,0) 889#if !PERL_VERSION_ATLEAST (5,10,0)
450 New(54,PL_retstack,16,OP*); 890 New(54,PL_retstack,4,OP*);
451 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
452 PL_retstack_max = 16; 892 PL_retstack_max = 4;
453#endif 893#endif
454} 894}
455#endif 895#endif
456 896
457/* 897/*
458 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
459 */ 899 */
460static void 900static void
461coro_destroy_stacks () 901coro_destruct_stacks (pTHX)
462{ 902{
463 if (!IN_DESTRUCT)
464 {
465 /* restore all saved variables and stuff */
466 LEAVE_SCOPE (0);
467 assert (PL_tmps_floor == -1);
468
469 /* free all temporaries */
470 FREETMPS;
471 assert (PL_tmps_ix == -1);
472
473 POPSTACK_TO (PL_mainstack);
474 }
475
476 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
477 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
478 905
479 while (PL_curstackinfo) 906 while (PL_curstackinfo)
480 { 907 {
… …
490 917
491 Safefree (PL_tmps_stack); 918 Safefree (PL_tmps_stack);
492 Safefree (PL_markstack); 919 Safefree (PL_markstack);
493 Safefree (PL_scopestack); 920 Safefree (PL_scopestack);
494 Safefree (PL_savestack); 921 Safefree (PL_savestack);
495#if !PERL_VERSION_ATLEAST (5,9,0) 922#if !PERL_VERSION_ATLEAST (5,10,0)
496 Safefree (PL_retstack); 923 Safefree (PL_retstack);
497#endif 924#endif
498} 925}
499 926
927#define CORO_RSS \
928 rss += sizeof (SYM (curstackinfo)); \
929 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
930 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
931 rss += SYM (tmps_max) * sizeof (SV *); \
932 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
933 rss += SYM (scopestack_max) * sizeof (I32); \
934 rss += SYM (savestack_max) * sizeof (ANY);
935
936static size_t
937coro_rss (pTHX_ struct coro *coro)
938{
939 size_t rss = sizeof (*coro);
940
941 if (coro->mainstack)
942 {
943 if (coro->flags & CF_RUNNING)
944 {
945 #define SYM(sym) PL_ ## sym
946 CORO_RSS;
947 #undef SYM
948 }
949 else
950 {
951 #define SYM(sym) coro->slot->sym
952 CORO_RSS;
953 #undef SYM
954 }
955 }
956
957 return rss;
958}
959
960/** coroutine stack handling ************************************************/
961
962static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
963static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
964static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
965
966/* apparently < 5.8.8 */
967#ifndef MgPV_nolen_const
968#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
969 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
970 (const char*)(mg)->mg_ptr)
971#endif
972
973/*
974 * This overrides the default magic get method of %SIG elements.
975 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
976 * and instead of trying to save and restore the hash elements (extremely slow),
977 * we just provide our own readback here.
978 */
979static int ecb_cold
980coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
981{
982 const char *s = MgPV_nolen_const (mg);
983
984 if (*s == '_')
985 {
986 SV **svp = 0;
987
988 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
989 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
990
991 if (svp)
992 {
993 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
994 return 0;
995 }
996 }
997
998 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
999}
1000
1001static int ecb_cold
1002coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1003{
1004 const char *s = MgPV_nolen_const (mg);
1005
1006 if (*s == '_')
1007 {
1008 SV **svp = 0;
1009
1010 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1011 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1012
1013 if (svp)
1014 {
1015 SV *old = *svp;
1016 *svp = 0;
1017 SvREFCNT_dec (old);
1018 return 0;
1019 }
1020 }
1021
1022 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1023}
1024
1025static int ecb_cold
1026coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1027{
1028 const char *s = MgPV_nolen_const (mg);
1029
1030 if (*s == '_')
1031 {
1032 SV **svp = 0;
1033
1034 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1035 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1036
1037 if (svp)
1038 {
1039 SV *old = *svp;
1040 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1041 SvREFCNT_dec (old);
1042 return 0;
1043 }
1044 }
1045
1046 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1047}
1048
1049static void
1050prepare_nop (pTHX_ struct coro_transfer_args *ta)
1051{
1052 /* kind of mega-hacky, but works */
1053 ta->next = ta->prev = (struct coro *)ta;
1054}
1055
500static void 1056static int
501setup_coro (struct coro *coro) 1057slf_check_nop (pTHX_ struct CoroSLF *frame)
1058{
1059 return 0;
1060}
1061
1062static int
1063slf_check_repeat (pTHX_ struct CoroSLF *frame)
1064{
1065 return 1;
1066}
1067
1068static UNOP init_perl_op;
1069
1070ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1071init_perl (pTHX_ struct coro *coro)
502{ 1072{
503 /* 1073 /*
504 * emulate part of the perl startup here. 1074 * emulate part of the perl startup here.
505 */ 1075 */
506
507 coro_init_stacks (); 1076 coro_init_stacks (aTHX);
508 1077
1078 PL_runops = RUNOPS_DEFAULT;
509 PL_curcop = &PL_compiling; 1079 PL_curcop = &PL_compiling;
510 PL_in_eval = EVAL_NULL; 1080 PL_in_eval = EVAL_NULL;
1081 PL_comppad = 0;
1082 PL_comppad_name = 0;
1083 PL_comppad_name_fill = 0;
1084 PL_comppad_name_floor = 0;
511 PL_curpm = 0; 1085 PL_curpm = 0;
1086 PL_curpad = 0;
512 PL_localizing = 0; 1087 PL_localizing = 0;
513 PL_dirty = 0;
514 PL_restartop = 0; 1088 PL_restartop = 0;
1089#if PERL_VERSION_ATLEAST (5,10,0)
1090 PL_parser = 0;
1091#endif
1092 PL_hints = 0;
1093
1094 /* recreate the die/warn hooks */
1095 PL_diehook = SvREFCNT_inc (rv_diehook);
1096 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1097
1098 GvSV (PL_defgv) = newSV (0);
1099 GvAV (PL_defgv) = coro->args; coro->args = 0;
1100 GvSV (PL_errgv) = newSV (0);
1101 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1102 GvHV (PL_hintgv) = 0;
1103 PL_rs = newSVsv (GvSV (irsgv));
1104 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
515 1105
516 { 1106 {
517 dSP; 1107 dSP;
518 LOGOP myop; 1108 UNOP myop;
519 1109
520 SvREFCNT_dec (GvAV (PL_defgv));
521 GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523 Zero (&myop, 1, LOGOP); 1110 Zero (&myop, 1, UNOP);
524 myop.op_next = Nullop; 1111 myop.op_next = Nullop;
1112 myop.op_type = OP_ENTERSUB;
525 myop.op_flags = OPf_WANT_VOID; 1113 myop.op_flags = OPf_WANT_VOID;
526 1114
527 PUSHMARK (SP); 1115 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1116 PUSHs ((SV *)coro->startcv);
529 PUTBACK; 1117 PUTBACK;
530 PL_op = (OP *)&myop; 1118 PL_op = (OP *)&myop;
531 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1119 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532 SPAGAIN;
533 } 1120 }
534 1121
535 ENTER; /* necessary e.g. for dounwind */ 1122 /* this newly created coroutine might be run on an existing cctx which most
536} 1123 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1124 */
1125 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1126 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1127 slf_frame.destroy = 0;
537 1128
1129 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1130 init_perl_op.op_next = PL_op;
1131 init_perl_op.op_type = OP_ENTERSUB;
1132 init_perl_op.op_ppaddr = pp_slf;
1133 /* no flags etc. required, as an init function won't be called */
1134
1135 PL_op = (OP *)&init_perl_op;
1136
1137 /* copy throw, in case it was set before init_perl */
1138 CORO_THROW = coro->except;
1139
1140 SWAP_SVS (coro);
1141
1142 if (ecb_expect_false (enable_times))
1143 {
1144 coro_times_update ();
1145 coro_times_sub (coro);
1146 }
1147}
1148
538static void 1149static void
1150coro_unwind_stacks (pTHX)
1151{
1152 if (!IN_DESTRUCT)
1153 {
1154 /* restore all saved variables and stuff */
1155 LEAVE_SCOPE (0);
1156 assert (PL_tmps_floor == -1);
1157
1158 /* free all temporaries */
1159 FREETMPS;
1160 assert (PL_tmps_ix == -1);
1161
1162 /* unwind all extra stacks */
1163 POPSTACK_TO (PL_mainstack);
1164
1165 /* unwind main stack */
1166 dounwind (-1);
1167 }
1168}
1169
1170static void
1171destroy_perl (pTHX_ struct coro *coro)
1172{
1173 SV *svf [9];
1174
1175 {
1176 SV *old_current = SvRV (coro_current);
1177 struct coro *current = SvSTATE (old_current);
1178
1179 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1180
1181 save_perl (aTHX_ current);
1182
1183 /* this will cause transfer_check to croak on block*/
1184 SvRV_set (coro_current, (SV *)coro->hv);
1185
1186 load_perl (aTHX_ coro);
1187
1188 coro_unwind_stacks (aTHX);
1189
1190 /* restore swapped sv's */
1191 SWAP_SVS (coro);
1192
1193 coro_destruct_stacks (aTHX);
1194
1195 /* now save some sv's to be free'd later */
1196 svf [0] = GvSV (PL_defgv);
1197 svf [1] = (SV *)GvAV (PL_defgv);
1198 svf [2] = GvSV (PL_errgv);
1199 svf [3] = (SV *)PL_defoutgv;
1200 svf [4] = PL_rs;
1201 svf [5] = GvSV (irsgv);
1202 svf [6] = (SV *)GvHV (PL_hintgv);
1203 svf [7] = PL_diehook;
1204 svf [8] = PL_warnhook;
1205 assert (9 == sizeof (svf) / sizeof (*svf));
1206
1207 SvRV_set (coro_current, old_current);
1208
1209 load_perl (aTHX_ current);
1210 }
1211
1212 {
1213 unsigned int i;
1214
1215 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1216 SvREFCNT_dec (svf [i]);
1217
1218 SvREFCNT_dec (coro->saved_deffh);
1219 SvREFCNT_dec (coro->rouse_cb);
1220 SvREFCNT_dec (coro->invoke_cb);
1221 SvREFCNT_dec (coro->invoke_av);
1222 }
1223}
1224
1225ECB_INLINE void
539free_coro_mortal () 1226free_coro_mortal (pTHX)
540{ 1227{
541 if (coro_mortal) 1228 if (ecb_expect_true (coro_mortal))
542 { 1229 {
543 SvREFCNT_dec (coro_mortal); 1230 SvREFCNT_dec ((SV *)coro_mortal);
544 coro_mortal = 0; 1231 coro_mortal = 0;
545 } 1232 }
546} 1233}
547 1234
548/* inject a fake call to Coro::State::_cctx_init into the execution */
549static void NOINLINE
550prepare_cctx (coro_cctx *cctx)
551{
552 dSP;
553 LOGOP myop;
554
555 Zero (&myop, 1, LOGOP);
556 myop.op_next = PL_op;
557 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558
559 PUSHMARK (SP);
560 EXTEND (SP, 2);
561 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
562 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
563 PUTBACK;
564 PL_op = (OP *)&myop;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566 SPAGAIN;
567}
568
569static void 1235static int
570coro_run (void *arg) 1236runops_trace (pTHX)
571{ 1237{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1238 COP *oldcop = 0;
573 UNLOCK; 1239 int oldcxix = -2;
574 1240
575 /* 1241 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
576 * this is a _very_ stripped down perl interpreter ;) 1242 {
577 */ 1243 PERL_ASYNC_CHECK ();
1244
1245 if (cctx_current->flags & CC_TRACE_ALL)
1246 {
1247 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1248 {
1249 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1250 SV **bot, **top;
1251 AV *av = newAV (); /* return values */
1252 SV **cb;
1253 dSP;
1254
1255 GV *gv = CvGV (cx->blk_sub.cv);
1256 SV *fullname = sv_2mortal (newSV (0));
1257 if (isGV (gv))
1258 gv_efullname3 (fullname, gv, 0);
1259
1260 bot = PL_stack_base + cx->blk_oldsp + 1;
1261 top = cx->blk_gimme == G_ARRAY ? SP + 1
1262 : cx->blk_gimme == G_SCALAR ? bot + 1
1263 : bot;
1264
1265 av_extend (av, top - bot);
1266 while (bot < top)
1267 av_push (av, SvREFCNT_inc_NN (*bot++));
1268
1269 PL_runops = RUNOPS_DEFAULT;
1270 ENTER;
1271 SAVETMPS;
1272 EXTEND (SP, 3);
1273 PUSHMARK (SP);
1274 PUSHs (&PL_sv_no);
1275 PUSHs (fullname);
1276 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1277 PUTBACK;
1278 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1279 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1280 SPAGAIN;
1281 FREETMPS;
1282 LEAVE;
1283 PL_runops = runops_trace;
1284 }
1285
1286 if (oldcop != PL_curcop)
1287 {
1288 oldcop = PL_curcop;
1289
1290 if (PL_curcop != &PL_compiling)
1291 {
1292 SV **cb;
1293
1294 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1295 {
1296 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1297
1298 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1299 {
1300 dSP;
1301 GV *gv = CvGV (cx->blk_sub.cv);
1302 SV *fullname = sv_2mortal (newSV (0));
1303
1304 if (isGV (gv))
1305 gv_efullname3 (fullname, gv, 0);
1306
1307 PL_runops = RUNOPS_DEFAULT;
1308 ENTER;
1309 SAVETMPS;
1310 EXTEND (SP, 3);
1311 PUSHMARK (SP);
1312 PUSHs (&PL_sv_yes);
1313 PUSHs (fullname);
1314 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1315 PUTBACK;
1316 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1317 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1318 SPAGAIN;
1319 FREETMPS;
1320 LEAVE;
1321 PL_runops = runops_trace;
1322 }
1323
1324 oldcxix = cxstack_ix;
1325 }
1326
1327 if (cctx_current->flags & CC_TRACE_LINE)
1328 {
1329 dSP;
1330
1331 PL_runops = RUNOPS_DEFAULT;
1332 ENTER;
1333 SAVETMPS;
1334 EXTEND (SP, 3);
1335 PL_runops = RUNOPS_DEFAULT;
1336 PUSHMARK (SP);
1337 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1338 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1339 PUTBACK;
1340 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1341 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1342 SPAGAIN;
1343 FREETMPS;
1344 LEAVE;
1345 PL_runops = runops_trace;
1346 }
1347 }
1348 }
1349 }
1350 }
1351
1352 TAINT_NOT;
1353 return 0;
1354}
1355
1356static struct CoroSLF cctx_ssl_frame;
1357
1358static void
1359slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1360{
1361 ta->prev = 0;
1362}
1363
1364static int
1365slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1366{
1367 *frame = cctx_ssl_frame;
1368
1369 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1370}
1371
1372/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1373static void ecb_noinline
1374cctx_prepare (pTHX)
1375{
578 PL_top_env = &PL_start_env; 1376 PL_top_env = &PL_start_env;
579 1377
1378 if (cctx_current->flags & CC_TRACE)
1379 PL_runops = runops_trace;
1380
1381 /* we already must be executing an SLF op, there is no other valid way
1382 * that can lead to creation of a new cctx */
1383 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1384 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1385
1386 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1387 cctx_ssl_frame = slf_frame;
1388
1389 slf_frame.prepare = slf_prepare_set_stacklevel;
1390 slf_frame.check = slf_check_set_stacklevel;
1391}
1392
1393/* the tail of transfer: execute stuff we can only do after a transfer */
1394ECB_INLINE void
1395transfer_tail (pTHX)
1396{
1397 free_coro_mortal (aTHX);
1398}
1399
1400/*
1401 * this is a _very_ stripped down perl interpreter ;)
1402 */
1403static void
1404cctx_run (void *arg)
1405{
1406#ifdef USE_ITHREADS
1407# if CORO_PTHREAD
1408 PERL_SET_CONTEXT (coro_thx);
1409# endif
1410#endif
1411 {
1412 dTHX;
1413
1414 /* normally we would need to skip the entersub here */
1415 /* not doing so will re-execute it, which is exactly what we want */
1416 /* PL_nop = PL_nop->op_next */
1417
580 /* inject call to cctx_init */ 1418 /* inject a fake subroutine call to cctx_init */
581 prepare_cctx ((coro_cctx *)arg); 1419 cctx_prepare (aTHX);
582 1420
1421 /* cctx_run is the alternative tail of transfer() */
1422 transfer_tail (aTHX);
1423
583 /* somebody will hit me for both perl_run and PL_restartop */ 1424 /* somebody or something will hit me for both perl_run and PL_restartop */
584 PL_restartop = PL_op; 1425 PL_restartop = PL_op;
585 perl_run (PL_curinterp); 1426 perl_run (PL_curinterp);
1427 /*
1428 * Unfortunately, there is no way to get at the return values of the
1429 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1430 * runtime errors here, as this is just a random interpreter, not a thread.
1431 */
586 1432
587 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1433 /*
588 abort (); 1434 * If perl-run returns we assume exit() was being called or the coro
1435 * fell off the end, which seems to be the only valid (non-bug)
1436 * reason for perl_run to return. We try to exit by jumping to the
1437 * bootstrap-time "top" top_env, as we cannot restore the "main"
1438 * coroutine as Coro has no such concept.
1439 * This actually isn't valid with the pthread backend, but OSes requiring
1440 * that backend are too broken to do it in a standards-compliant way.
1441 */
1442 PL_top_env = main_top_env;
1443 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1444 }
589} 1445}
590 1446
591static coro_cctx * 1447static coro_cctx *
592cctx_new () 1448cctx_new (void)
593{ 1449{
594 coro_cctx *cctx; 1450 coro_cctx *cctx;
595 1451
596 ++cctx_count; 1452 ++cctx_count;
597
598 Newz (0, cctx, 1, coro_cctx); 1453 New (0, cctx, 1, coro_cctx);
1454
1455 cctx->gen = cctx_gen;
1456 cctx->flags = 0;
1457 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1458
1459 return cctx;
1460}
1461
1462/* create a new cctx only suitable as source */
1463static coro_cctx *
1464cctx_new_empty (void)
1465{
1466 coro_cctx *cctx = cctx_new ();
1467
1468 cctx->sptr = 0;
1469 coro_create (&cctx->cctx, 0, 0, 0, 0);
1470
1471 return cctx;
1472}
1473
1474/* create a new cctx suitable as destination/running a perl interpreter */
1475static coro_cctx *
1476cctx_new_run (void)
1477{
1478 coro_cctx *cctx = cctx_new ();
1479 void *stack_start;
1480 size_t stack_size;
599 1481
600#if HAVE_MMAP 1482#if HAVE_MMAP
601
602 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1483 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603 /* mmap supposedly does allocate-on-write for us */ 1484 /* mmap supposedly does allocate-on-write for us */
604 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1485 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
605 1486
606 if (cctx->sptr == (void *)-1) 1487 if (cctx->sptr != (void *)-1)
607 {
608 perror ("FATAL: unable to mmap stack for coroutine");
609 _exit (EXIT_FAILURE);
610 } 1488 {
611 1489 #if CORO_STACKGUARD
612# if STACKGUARD
613 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1490 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614# endif 1491 #endif
615 1492 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
616#else 1493 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
617 1494 cctx->flags |= CC_MAPPED;
618 cctx->ssize = STACKSIZE * (long)sizeof (long);
619 New (0, cctx->sptr, STACKSIZE, long);
620
621 if (!cctx->sptr)
622 { 1495 }
623 perror ("FATAL: unable to malloc stack for coroutine"); 1496 else
624 _exit (EXIT_FAILURE);
625 }
626
627#endif 1497#endif
1498 {
1499 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1500 New (0, cctx->sptr, cctx_stacksize, long);
628 1501
1502 if (!cctx->sptr)
1503 {
1504 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1505 _exit (EXIT_FAILURE);
1506 }
1507
1508 stack_start = cctx->sptr;
1509 stack_size = cctx->ssize;
1510 }
1511
629#if USE_VALGRIND 1512 #if CORO_USE_VALGRIND
630 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1513 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
631 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632 cctx->ssize + (char *)cctx->sptr
633 );
634#endif 1514 #endif
635 1515
636 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1516 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
637 1517
638 return cctx; 1518 return cctx;
639} 1519}
640 1520
641static void 1521static void
642cctx_destroy (coro_cctx *cctx) 1522cctx_destroy (coro_cctx *cctx)
643{ 1523{
644 if (!cctx) 1524 if (!cctx)
645 return; 1525 return;
646 1526
1527 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1528
647 --cctx_count; 1529 --cctx_count;
1530 coro_destroy (&cctx->cctx);
648 1531
649#if USE_VALGRIND 1532 /* coro_transfer creates new, empty cctx's */
1533 if (cctx->sptr)
1534 {
1535 #if CORO_USE_VALGRIND
650 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1536 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1537 #endif
1538
1539#if HAVE_MMAP
1540 if (cctx->flags & CC_MAPPED)
1541 munmap (cctx->sptr, cctx->ssize);
1542 else
651#endif 1543#endif
652
653#if HAVE_MMAP
654 munmap (cctx->sptr, cctx->ssize);
655#else
656 Safefree (cctx->sptr); 1544 Safefree (cctx->sptr);
657#endif 1545 }
658 1546
659 Safefree (cctx); 1547 Safefree (cctx);
660} 1548}
661 1549
1550/* wether this cctx should be destructed */
1551#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1552
662static coro_cctx * 1553static coro_cctx *
663cctx_get () 1554cctx_get (pTHX)
664{ 1555{
665 coro_cctx *cctx; 1556 while (ecb_expect_true (cctx_first))
666
667 if (cctx_first)
668 { 1557 {
669 cctx = cctx_first; 1558 coro_cctx *cctx = cctx_first;
670 cctx_first = cctx->next; 1559 cctx_first = cctx->next;
671 --cctx_idle; 1560 --cctx_idle;
672 } 1561
673 else 1562 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
674 { 1563 return cctx;
675 cctx = cctx_new (); 1564
676 PL_op = PL_op->op_next; 1565 cctx_destroy (cctx);
677 } 1566 }
678 1567
679 return cctx; 1568 return cctx_new_run ();
680} 1569}
681 1570
682static void 1571static void
683cctx_put (coro_cctx *cctx) 1572cctx_put (coro_cctx *cctx)
684{ 1573{
1574 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1575
685 /* free another cctx if overlimit */ 1576 /* free another cctx if overlimit */
686 if (cctx_idle >= MAX_IDLE_CCTX) 1577 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
687 { 1578 {
688 coro_cctx *first = cctx_first; 1579 coro_cctx *first = cctx_first;
689 cctx_first = first->next; 1580 cctx_first = first->next;
690 --cctx_idle; 1581 --cctx_idle;
691 1582
692 assert (!first->inuse);
693 cctx_destroy (first); 1583 cctx_destroy (first);
694 } 1584 }
695 1585
696 ++cctx_idle; 1586 ++cctx_idle;
697 cctx->next = cctx_first; 1587 cctx->next = cctx_first;
698 cctx_first = cctx; 1588 cctx_first = cctx;
699} 1589}
700 1590
701/* never call directly, always through the coro_state_transfer global variable */ 1591/** coroutine switching *****************************************************/
702static void NOINLINE 1592
1593static void
703transfer (struct coro *prev, struct coro *next) 1594transfer_check (pTHX_ struct coro *prev, struct coro *next)
1595{
1596 /* TODO: throwing up here is considered harmful */
1597
1598 if (ecb_expect_true (prev != next))
1599 {
1600 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1601 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1602
1603 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1604 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1605
1606#if !PERL_VERSION_ATLEAST (5,10,0)
1607 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1608 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1609#endif
1610 }
1611}
1612
1613/* always use the TRANSFER macro */
1614static void ecb_noinline /* noinline so we have a fixed stackframe */
1615transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
704{ 1616{
705 dSTACKLEVEL; 1617 dSTACKLEVEL;
706 1618
707 /* sometimes transfer is only called to set idle_sp */ 1619 /* sometimes transfer is only called to set idle_sp */
708 if (!next) 1620 if (ecb_expect_false (!prev))
709 { 1621 {
710 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1622 cctx_current->idle_sp = STACKLEVEL;
711 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1623 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712 }
713 else if (prev != next)
714 { 1624 }
1625 else if (ecb_expect_true (prev != next))
1626 {
715 coro_cctx *prev__cctx; 1627 coro_cctx *cctx_prev;
716 1628
717 if (prev->flags & CF_NEW) 1629 if (ecb_expect_false (prev->flags & CF_NEW))
718 { 1630 {
719 /* create a new empty context */ 1631 /* create a new empty/source context */
720 Newz (0, prev->cctx, 1, coro_cctx);
721 prev->cctx->inuse = 1;
722 prev->flags &= ~CF_NEW; 1632 prev->flags &= ~CF_NEW;
723 prev->flags |= CF_RUNNING; 1633 prev->flags |= CF_RUNNING;
724 } 1634 }
725 1635
726 /*TODO: must not croak here */
727 if (!prev->flags & CF_RUNNING)
728 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730 if (next->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733 prev->flags &= ~CF_RUNNING; 1636 prev->flags &= ~CF_RUNNING;
734 next->flags |= CF_RUNNING; 1637 next->flags |= CF_RUNNING;
735 1638
736 LOCK; 1639 /* first get rid of the old state */
1640 save_perl (aTHX_ prev);
737 1641
738 if (next->flags & CF_NEW) 1642 if (ecb_expect_false (next->flags & CF_NEW))
739 { 1643 {
740 /* need to start coroutine */ 1644 /* need to start coroutine */
741 next->flags &= ~CF_NEW; 1645 next->flags &= ~CF_NEW;
742 /* first get rid of the old state */
743 save_perl (prev);
744 /* setup coroutine call */ 1646 /* setup coroutine call */
745 setup_coro (next); 1647 init_perl (aTHX_ next);
746 /* need a new stack */
747 assert (!next->cctx);
748 } 1648 }
749 else 1649 else
1650 load_perl (aTHX_ next);
1651
1652 /* possibly untie and reuse the cctx */
1653 if (ecb_expect_true (
1654 cctx_current->idle_sp == STACKLEVEL
1655 && !(cctx_current->flags & CC_TRACE)
1656 && !force_cctx
1657 ))
750 { 1658 {
751 /* coroutine already started */ 1659 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
752 save_perl (prev); 1660 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
753 load_perl (next); 1661
1662 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1663 /* without this the next cctx_get might destroy the running cctx while still in use */
1664 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1665 if (ecb_expect_true (!next->cctx))
1666 next->cctx = cctx_get (aTHX);
1667
1668 cctx_put (cctx_current);
754 } 1669 }
1670 else
1671 prev->cctx = cctx_current;
755 1672
756 prev__cctx = prev->cctx; 1673 ++next->usecount;
757 1674
758 /* possibly "free" the cctx */ 1675 cctx_prev = cctx_current;
759 if (prev__cctx->idle_sp == STACKLEVEL) 1676 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1677
1678 next->cctx = 0;
1679
1680 if (ecb_expect_false (cctx_prev != cctx_current))
760 { 1681 {
761 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1682 cctx_prev->top_env = PL_top_env;
762 assert (PL_top_env == prev__cctx->top_env); 1683 PL_top_env = cctx_current->top_env;
763 1684 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
764 prev->cctx = 0;
765
766 cctx_put (prev__cctx);
767 prev__cctx->inuse = 0;
768 } 1685 }
769 1686
770 if (!next->cctx) 1687 transfer_tail (aTHX);
771 {
772 next->cctx = cctx_get ();
773 assert (!next->cctx->inuse);
774 next->cctx->inuse = 1;
775 }
776
777 if (prev__cctx != next->cctx)
778 {
779 prev__cctx->top_env = PL_top_env;
780 PL_top_env = next->cctx->top_env;
781 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782 }
783
784 free_coro_mortal ();
785
786 UNLOCK;
787 } 1688 }
788} 1689}
789 1690
790struct transfer_args 1691#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
791{
792 struct coro *prev, *next;
793};
794
795#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1692#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
796 1693
1694/** high level stuff ********************************************************/
1695
1696/* this function is actually Coro, not Coro::State, but we call it from here */
1697/* because it is convenient - but it hasn't been declared yet for that reason */
797static void 1698static void
1699coro_call_on_destroy (pTHX_ struct coro *coro);
1700
1701static void
798coro_state_destroy (struct coro *coro) 1702coro_state_destroy (pTHX_ struct coro *coro)
799{ 1703{
800 if (coro->refcnt--) 1704 if (coro->flags & CF_ZOMBIE)
801 return; 1705 return;
802 1706
803 if (coro->mainstack && coro->mainstack != main_mainstack) 1707 slf_destroy (aTHX_ coro);
804 {
805 struct coro temp;
806 Zero (&temp, 1, struct coro);
807 temp.save = CORO_SAVE_ALL;
808 1708
1709 coro->flags |= CF_ZOMBIE;
1710
809 if (coro->flags & CF_RUNNING) 1711 if (coro->flags & CF_READY)
810 croak ("FATAL: tried to destroy currently running coroutine");
811
812 save_perl (&temp);
813 load_perl (coro);
814
815 coro_destroy_stacks ();
816
817 load_perl (&temp); /* this will get rid of defsv etc.. */
818
819 coro->mainstack = 0;
820 } 1712 {
1713 /* reduce nready, as destroying a ready coro effectively unreadies it */
1714 /* alternative: look through all ready queues and remove the coro */
1715 --coro_nready;
1716 }
1717 else
1718 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1719
1720 if (coro->next) coro->next->prev = coro->prev;
1721 if (coro->prev) coro->prev->next = coro->next;
1722 if (coro == coro_first) coro_first = coro->next;
1723
1724 if (coro->mainstack
1725 && coro->mainstack != main_mainstack
1726 && coro->slot
1727 && !PL_dirty)
1728 destroy_perl (aTHX_ coro);
821 1729
822 cctx_destroy (coro->cctx); 1730 cctx_destroy (coro->cctx);
1731 SvREFCNT_dec (coro->startcv);
823 SvREFCNT_dec (coro->args); 1732 SvREFCNT_dec (coro->args);
824 Safefree (coro); 1733 SvREFCNT_dec (coro->swap_sv);
1734 SvREFCNT_dec (CORO_THROW);
1735
1736 coro_call_on_destroy (aTHX_ coro);
1737
1738 /* more destruction mayhem in coro_state_free */
825} 1739}
826 1740
827static int 1741static int
828coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1742coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829{ 1743{
830 struct coro *coro = (struct coro *)mg->mg_ptr; 1744 struct coro *coro = (struct coro *)mg->mg_ptr;
831 mg->mg_ptr = 0; 1745 mg->mg_ptr = 0;
832 1746
833 coro_state_destroy (coro); 1747 coro_state_destroy (aTHX_ coro);
1748 SvREFCNT_dec (coro->on_destroy);
1749 SvREFCNT_dec (coro->status);
1750
1751 Safefree (coro);
834 1752
835 return 0; 1753 return 0;
836} 1754}
837 1755
838static int 1756static int ecb_cold
839coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1757coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
840{ 1758{
841 struct coro *coro = (struct coro *)mg->mg_ptr; 1759 /* called when perl clones the current process the slow way (windows process emulation) */
842 1760 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
843 ++coro->refcnt; 1761 mg->mg_ptr = 0;
1762 mg->mg_virtual = 0;
844 1763
845 return 0; 1764 return 0;
846} 1765}
847 1766
848static MGVTBL coro_state_vtbl = { 1767static MGVTBL coro_state_vtbl = {
849 0, 0, 0, 0, 1768 0, 0, 0, 0,
850 coro_state_clear, 1769 coro_state_free,
851 0, 1770 0,
852#ifdef MGf_DUP 1771#ifdef MGf_DUP
853 coro_state_dup, 1772 coro_state_dup,
854#else 1773#else
855# define MGf_DUP 0 1774# define MGf_DUP 0
856#endif 1775#endif
857}; 1776};
858 1777
859static struct coro *
860SvSTATE (SV *coro)
861{
862 HV *stash;
863 MAGIC *mg;
864
865 if (SvROK (coro))
866 coro = SvRV (coro);
867
868 stash = SvSTASH (coro);
869 if (stash != coro_stash && stash != coro_state_stash)
870 {
871 /* very slow, but rare, check */
872 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873 croak ("Coro::State object required");
874 }
875
876 mg = SvMAGIC (coro);
877 assert (mg->mg_type == PERL_MAGIC_ext);
878 return (struct coro *)mg->mg_ptr;
879}
880
881static void 1778static void
882prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1779prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
883{ 1780{
884 ta->prev = SvSTATE (prev_sv); 1781 ta->prev = SvSTATE (prev_sv);
885 ta->next = SvSTATE (next_sv); 1782 ta->next = SvSTATE (next_sv);
1783 TRANSFER_CHECK (*ta);
886} 1784}
887 1785
888static void 1786static void
889api_transfer (SV *prev_sv, SV *next_sv) 1787api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
890{ 1788{
891 struct transfer_args ta; 1789 struct coro_transfer_args ta;
892 1790
893 prepare_transfer (&ta, prev_sv, next_sv); 1791 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894 TRANSFER (ta); 1792 TRANSFER (ta, 1);
1793}
1794
1795/** Coro ********************************************************************/
1796
1797ECB_INLINE void
1798coro_enq (pTHX_ struct coro *coro)
1799{
1800 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1801
1802 SvREFCNT_inc_NN (coro->hv);
1803
1804 coro->next_ready = 0;
1805 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1806 ready [1] = coro;
1807}
1808
1809ECB_INLINE struct coro *
1810coro_deq (pTHX)
1811{
1812 int prio;
1813
1814 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1815 {
1816 struct coro **ready = coro_ready [prio];
1817
1818 if (ready [0])
1819 {
1820 struct coro *coro = ready [0];
1821 ready [0] = coro->next_ready;
1822 return coro;
1823 }
1824 }
1825
1826 return 0;
1827}
1828
1829static void
1830invoke_sv_ready_hook_helper (void)
1831{
1832 dTHX;
1833 dSP;
1834
1835 ENTER;
1836 SAVETMPS;
1837
1838 PUSHMARK (SP);
1839 PUTBACK;
1840 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1841
1842 FREETMPS;
1843 LEAVE;
895} 1844}
896 1845
897static int 1846static int
898api_save (SV *coro_sv, int new_save) 1847api_ready (pTHX_ SV *coro_sv)
899{ 1848{
900 struct coro *coro = SvSTATE (coro_sv); 1849 struct coro *coro = SvSTATE (coro_sv);
901 int old_save = coro->save;
902
903 if (new_save >= 0)
904 coro->save = new_save;
905
906 return old_save;
907}
908
909/** Coro ********************************************************************/
910
911#define PRIO_MAX 3
912#define PRIO_HIGH 1
913#define PRIO_NORMAL 0
914#define PRIO_LOW -1
915#define PRIO_IDLE -3
916#define PRIO_MIN -4
917
918/* for Coro.pm */
919static SV *coro_current;
920static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
921static int coro_nready;
922
923static void
924coro_enq (SV *coro_sv)
925{
926 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
927 coro_nready++;
928}
929
930static SV *
931coro_deq (int min_prio)
932{
933 int prio = PRIO_MAX - PRIO_MIN;
934
935 min_prio -= PRIO_MIN;
936 if (min_prio < 0)
937 min_prio = 0;
938
939 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
940 if (AvFILLp (coro_ready [prio]) >= 0)
941 {
942 coro_nready--;
943 return av_shift (coro_ready [prio]);
944 }
945
946 return 0;
947}
948
949static int
950api_ready (SV *coro_sv)
951{
952 struct coro *coro;
953
954 if (SvROK (coro_sv))
955 coro_sv = SvRV (coro_sv);
956
957 coro = SvSTATE (coro_sv);
958 1850
959 if (coro->flags & CF_READY) 1851 if (coro->flags & CF_READY)
960 return 0; 1852 return 0;
961 1853
962 coro->flags |= CF_READY; 1854 coro->flags |= CF_READY;
963 1855
964 LOCK; 1856 coro_enq (aTHX_ coro);
965 coro_enq (SvREFCNT_inc (coro_sv)); 1857
966 UNLOCK; 1858 if (!coro_nready++)
1859 if (coroapi.readyhook)
1860 coroapi.readyhook ();
967 1861
968 return 1; 1862 return 1;
969} 1863}
970 1864
971static int 1865static int
972api_is_ready (SV *coro_sv) 1866api_is_ready (pTHX_ SV *coro_sv)
973{ 1867{
974 return !!SvSTATE (coro_sv)->flags & CF_READY; 1868 return !!(SvSTATE (coro_sv)->flags & CF_READY);
975} 1869}
976 1870
1871/* expects to own a reference to next->hv */
1872ECB_INLINE void
1873prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1874{
1875 SV *prev_sv = SvRV (coro_current);
1876
1877 ta->prev = SvSTATE_hv (prev_sv);
1878 ta->next = next;
1879
1880 TRANSFER_CHECK (*ta);
1881
1882 SvRV_set (coro_current, (SV *)next->hv);
1883
1884 free_coro_mortal (aTHX);
1885 coro_mortal = prev_sv;
1886}
1887
977static void 1888static void
978prepare_schedule (struct transfer_args *ta) 1889prepare_schedule (pTHX_ struct coro_transfer_args *ta)
979{ 1890{
980 SV *prev, *next;
981
982 for (;;) 1891 for (;;)
983 { 1892 {
984 LOCK; 1893 struct coro *next = coro_deq (aTHX);
985 next = coro_deq (PRIO_MIN);
986 UNLOCK;
987 1894
988 if (next) 1895 if (ecb_expect_true (next))
1896 {
1897 /* cannot transfer to destroyed coros, skip and look for next */
1898 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1899 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1900 else
1901 {
1902 next->flags &= ~CF_READY;
1903 --coro_nready;
1904
1905 prepare_schedule_to (aTHX_ ta, next);
989 break; 1906 break;
1907 }
1908 }
1909 else
1910 {
1911 /* nothing to schedule: call the idle handler */
1912 if (SvROK (sv_idle)
1913 && SvOBJECT (SvRV (sv_idle)))
1914 {
1915 if (SvRV (sv_idle) == SvRV (coro_current))
1916 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1917
1918 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1919 api_ready (aTHX_ SvRV (sv_idle));
1920 --coro_nready;
1921 }
1922 else
1923 {
1924 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1925 dSP;
1926
1927 ENTER;
1928 SAVETMPS;
1929
1930 PUSHMARK (SP);
1931 PUTBACK;
1932 call_sv (sv_idle, G_VOID | G_DISCARD);
1933
1934 FREETMPS;
1935 LEAVE;
1936 }
1937 }
1938 }
1939}
1940
1941ECB_INLINE void
1942prepare_cede (pTHX_ struct coro_transfer_args *ta)
1943{
1944 api_ready (aTHX_ coro_current);
1945 prepare_schedule (aTHX_ ta);
1946}
1947
1948ECB_INLINE void
1949prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1950{
1951 SV *prev = SvRV (coro_current);
1952
1953 if (coro_nready)
1954 {
1955 prepare_schedule (aTHX_ ta);
1956 api_ready (aTHX_ prev);
1957 }
1958 else
1959 prepare_nop (aTHX_ ta);
1960}
1961
1962static void
1963api_schedule (pTHX)
1964{
1965 struct coro_transfer_args ta;
1966
1967 prepare_schedule (aTHX_ &ta);
1968 TRANSFER (ta, 1);
1969}
1970
1971static void
1972api_schedule_to (pTHX_ SV *coro_sv)
1973{
1974 struct coro_transfer_args ta;
1975 struct coro *next = SvSTATE (coro_sv);
1976
1977 SvREFCNT_inc_NN (coro_sv);
1978 prepare_schedule_to (aTHX_ &ta, next);
1979}
1980
1981static int
1982api_cede (pTHX)
1983{
1984 struct coro_transfer_args ta;
1985
1986 prepare_cede (aTHX_ &ta);
1987
1988 if (ecb_expect_true (ta.prev != ta.next))
1989 {
1990 TRANSFER (ta, 1);
1991 return 1;
1992 }
1993 else
1994 return 0;
1995}
1996
1997static int
1998api_cede_notself (pTHX)
1999{
2000 if (coro_nready)
2001 {
2002 struct coro_transfer_args ta;
2003
2004 prepare_cede_notself (aTHX_ &ta);
2005 TRANSFER (ta, 1);
2006 return 1;
2007 }
2008 else
2009 return 0;
2010}
2011
2012static void
2013api_trace (pTHX_ SV *coro_sv, int flags)
2014{
2015 struct coro *coro = SvSTATE (coro_sv);
2016
2017 if (coro->flags & CF_RUNNING)
2018 croak ("cannot enable tracing on a running coroutine, caught");
2019
2020 if (flags & CC_TRACE)
2021 {
2022 if (!coro->cctx)
2023 coro->cctx = cctx_new_run ();
2024 else if (!(coro->cctx->flags & CC_TRACE))
2025 croak ("cannot enable tracing on coroutine with custom stack, caught");
2026
2027 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2028 }
2029 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2030 {
2031 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2032
2033 if (coro->flags & CF_RUNNING)
2034 PL_runops = RUNOPS_DEFAULT;
2035 else
2036 coro->slot->runops = RUNOPS_DEFAULT;
2037 }
2038}
2039
2040static void
2041coro_push_av (pTHX_ AV *av, I32 gimme_v)
2042{
2043 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2044 {
2045 dSP;
2046
2047 if (gimme_v == G_SCALAR)
2048 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2049 else
2050 {
2051 int i;
2052 EXTEND (SP, AvFILLp (av) + 1);
2053
2054 for (i = 0; i <= AvFILLp (av); ++i)
2055 PUSHs (AvARRAY (av)[i]);
2056 }
2057
2058 PUTBACK;
2059 }
2060}
2061
2062static void
2063coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2064{
2065 if (!coro->on_destroy)
2066 coro->on_destroy = newAV ();
2067
2068 av_push (coro->on_destroy, cb);
2069}
2070
2071static void
2072slf_destroy_join (pTHX_ struct CoroSLF *frame)
2073{
2074 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2075}
2076
2077static int
2078slf_check_join (pTHX_ struct CoroSLF *frame)
2079{
2080 struct coro *coro = (struct coro *)frame->data;
2081
2082 if (!coro->status)
2083 return 1;
2084
2085 frame->destroy = 0;
2086
2087 coro_push_av (aTHX_ coro->status, GIMME_V);
2088
2089 SvREFCNT_dec ((SV *)coro->hv);
2090
2091 return 0;
2092}
2093
2094static void
2095slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2098
2099 if (items > 1)
2100 croak ("join called with too many arguments");
2101
2102 if (coro->status)
2103 frame->prepare = prepare_nop;
2104 else
2105 {
2106 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2107 frame->prepare = prepare_schedule;
2108 }
2109
2110 frame->check = slf_check_join;
2111 frame->destroy = slf_destroy_join;
2112 frame->data = (void *)coro;
2113 SvREFCNT_inc (coro->hv);
2114}
2115
2116static void
2117coro_call_on_destroy (pTHX_ struct coro *coro)
2118{
2119 AV *od = coro->on_destroy;
2120
2121 if (!od)
2122 return;
2123
2124 while (AvFILLp (od) >= 0)
2125 {
2126 SV *cb = sv_2mortal (av_pop (od));
2127
2128 /* coro hv's (and only hv's at the moment) are supported as well */
2129 if (SvSTATEhv_p (aTHX_ cb))
2130 api_ready (aTHX_ cb);
2131 else
2132 {
2133 dSP; /* don't disturb outer sp */
2134 PUSHMARK (SP);
2135
2136 if (coro->status)
2137 {
2138 PUTBACK;
2139 coro_push_av (aTHX_ coro->status, G_ARRAY);
2140 SPAGAIN;
2141 }
2142
2143 PUTBACK;
2144 call_sv (cb, G_VOID | G_DISCARD);
2145 }
2146 }
2147}
2148
2149static void
2150coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2151{
2152 AV *av;
2153
2154 if (coro->status)
2155 {
2156 av = coro->status;
2157 av_clear (av);
2158 }
2159 else
2160 av = coro->status = newAV ();
2161
2162 /* items are actually not so common, so optimise for this case */
2163 if (items)
2164 {
2165 int i;
2166
2167 av_extend (av, items - 1);
2168
2169 for (i = 0; i < items; ++i)
2170 av_push (av, SvREFCNT_inc_NN (arg [i]));
2171 }
2172}
2173
2174static void
2175slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2176{
2177 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2178 api_ready (aTHX_ sv_manager);
2179
2180 frame->prepare = prepare_schedule;
2181 frame->check = slf_check_repeat;
2182
2183 /* as a minor optimisation, we could unwind all stacks here */
2184 /* but that puts extra pressure on pp_slf, and is not worth much */
2185 /*coro_unwind_stacks (aTHX);*/
2186}
2187
2188static void
2189slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 HV *coro_hv = (HV *)SvRV (coro_current);
2192
2193 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2194 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2195}
2196
2197static void
2198slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2199{
2200 HV *coro_hv;
2201 struct coro *coro;
2202
2203 if (items <= 0)
2204 croak ("Coro::cancel called without coro object,");
2205
2206 coro = SvSTATE (arg [0]);
2207 coro_hv = coro->hv;
2208
2209 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2210
2211 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2212 {
2213 /* coro currently busy cancelling something, so just notify it */
2214 coro->slf_frame.data = (void *)coro;
2215
2216 frame->prepare = prepare_nop;
2217 frame->check = slf_check_nop;
2218 }
2219 else if (coro_hv == (HV *)SvRV (coro_current))
2220 {
2221 /* cancelling the current coro is allowed, and equals terminate */
2222 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2223 }
2224 else
2225 {
2226 struct coro *self = SvSTATE_current;
2227
2228 /* otherwise we cancel directly, purely for speed reasons
2229 * unfortunately, this requires some magic trickery, as
2230 * somebody else could cancel us, so we have to fight the cancellation.
2231 * this is ugly, and hopefully fully worth the extra speed.
2232 * besides, I can't get the slow-but-safe version working...
2233 */
2234 slf_frame.data = 0;
2235 self->flags |= CF_NOCANCEL;
2236 coro_state_destroy (aTHX_ coro);
2237 self->flags &= ~CF_NOCANCEL;
2238
2239 if (slf_frame.data)
2240 {
2241 /* while we were busy we have been cancelled, so terminate */
2242 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2243 }
2244 else
2245 {
2246 frame->prepare = prepare_nop;
2247 frame->check = slf_check_nop;
2248 }
2249 }
2250}
2251
2252static int
2253slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2254{
2255 frame->prepare = 0;
2256 coro_unwind_stacks (aTHX);
2257
2258 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2259
2260 return 1;
2261}
2262
2263static int
2264safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2265{
2266 if (coro->cctx)
2267 croak ("coro inside C callback, unable to cancel at this time, caught");
2268
2269 if (coro->flags & CF_NEW)
2270 {
2271 coro_set_status (aTHX_ coro, arg, items);
2272 coro_state_destroy (aTHX_ coro);
2273 }
2274 else
2275 {
2276 if (!coro->slf_frame.prepare)
2277 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2278
2279 slf_destroy (aTHX_ coro);
2280
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro->slf_frame.prepare = prepare_nop;
2283 coro->slf_frame.check = slf_check_safe_cancel;
2284
2285 api_ready (aTHX_ (SV *)coro->hv);
2286 }
2287
2288 return 1;
2289}
2290
2291/*****************************************************************************/
2292/* async pool handler */
2293
2294static int
2295slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2296{
2297 HV *hv = (HV *)SvRV (coro_current);
2298 struct coro *coro = (struct coro *)frame->data;
2299
2300 if (!coro->invoke_cb)
2301 return 1; /* loop till we have invoke */
2302 else
2303 {
2304 hv_store (hv, "desc", sizeof ("desc") - 1,
2305 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2306
2307 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
990 2308
991 { 2309 {
992 dSP; 2310 dSP;
993 2311 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
994 ENTER;
995 SAVETMPS;
996
997 PUSHMARK (SP);
998 PUTBACK; 2312 PUTBACK;
999 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001 FREETMPS;
1002 LEAVE;
1003 } 2313 }
2314
2315 SvREFCNT_dec (GvAV (PL_defgv));
2316 GvAV (PL_defgv) = coro->invoke_av;
2317 coro->invoke_av = 0;
2318
2319 return 0;
2320 }
2321}
2322
2323static void
2324slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = SvSTATE_hv ((SV *)hv);
2328
2329 if (ecb_expect_true (coro->saved_deffh))
1004 } 2330 {
2331 /* subsequent iteration */
2332 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2333 coro->saved_deffh = 0;
1005 2334
2335 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2336 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2337 {
2338 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2339 return;
2340 }
2341 else
2342 {
2343 av_clear (GvAV (PL_defgv));
2344 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2345
2346 coro->prio = 0;
2347
2348 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2349 api_trace (aTHX_ coro_current, 0);
2350
2351 frame->prepare = prepare_schedule;
2352 av_push (av_async_pool, SvREFCNT_inc (hv));
2353 }
2354 }
2355 else
2356 {
2357 /* first iteration, simply fall through */
2358 frame->prepare = prepare_nop;
2359 }
2360
2361 frame->check = slf_check_pool_handler;
2362 frame->data = (void *)coro;
2363}
2364
2365/*****************************************************************************/
2366/* rouse callback */
2367
2368#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2369
2370static void
2371coro_rouse_callback (pTHX_ CV *cv)
2372{
2373 dXSARGS;
2374 SV *data = (SV *)S_GENSUB_ARG;
2375
2376 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2377 {
2378 /* first call, set args */
2379 SV *coro = SvRV (data);
2380 AV *av = newAV ();
2381
2382 SvRV_set (data, (SV *)av);
2383
2384 /* better take a full copy of the arguments */
2385 while (items--)
2386 av_store (av, items, newSVsv (ST (items)));
2387
2388 api_ready (aTHX_ coro);
2389 SvREFCNT_dec (coro);
2390 }
2391
2392 XSRETURN_EMPTY;
2393}
2394
2395static int
2396slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2397{
2398 SV *data = (SV *)frame->data;
2399
2400 if (CORO_THROW)
2401 return 0;
2402
2403 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2404 return 1;
2405
2406 /* now push all results on the stack */
2407 {
2408 dSP;
2409 AV *av = (AV *)SvRV (data);
2410 int i;
2411
2412 EXTEND (SP, AvFILLp (av) + 1);
2413 for (i = 0; i <= AvFILLp (av); ++i)
2414 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2415
2416 /* we have stolen the elements, so set length to zero and free */
2417 AvFILLp (av) = -1;
2418 av_undef (av);
2419
2420 PUTBACK;
2421 }
2422
2423 return 0;
2424}
2425
2426static void
2427slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2428{
2429 SV *cb;
2430
2431 if (items)
2432 cb = arg [0];
2433 else
2434 {
2435 struct coro *coro = SvSTATE_current;
2436
2437 if (!coro->rouse_cb)
2438 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2439
2440 cb = sv_2mortal (coro->rouse_cb);
2441 coro->rouse_cb = 0;
2442 }
2443
2444 if (!SvROK (cb)
2445 || SvTYPE (SvRV (cb)) != SVt_PVCV
2446 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2447 croak ("Coro::rouse_wait called with illegal callback argument,");
2448
2449 {
2450 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2451 SV *data = (SV *)S_GENSUB_ARG;
2452
2453 frame->data = (void *)data;
2454 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2455 frame->check = slf_check_rouse_wait;
2456 }
2457}
2458
2459static SV *
2460coro_new_rouse_cb (pTHX)
2461{
1006 prev = SvRV (coro_current); 2462 HV *hv = (HV *)SvRV (coro_current);
1007 SvRV_set (coro_current, next); 2463 struct coro *coro = SvSTATE_hv (hv);
2464 SV *data = newRV_inc ((SV *)hv);
2465 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
1008 2466
1009 /* free this only after the transfer */ 2467 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1010 LOCK; 2468 SvREFCNT_dec (data); /* magicext increases the refcount */
1011 free_coro_mortal ();
1012 UNLOCK;
1013 coro_mortal = prev;
1014 2469
1015 assert (!SvROK(prev));//D 2470 SvREFCNT_dec (coro->rouse_cb);
1016 assert (!SvROK(next));//D 2471 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1017 2472
1018 ta->prev = SvSTATE (prev); 2473 return cb;
1019 ta->next = SvSTATE (next);
1020
1021 assert (ta->next->flags & CF_READY);
1022 ta->next->flags &= ~CF_READY;
1023} 2474}
1024 2475
2476/*****************************************************************************/
2477/* schedule-like-function opcode (SLF) */
2478
2479static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2480static const CV *slf_cv;
2481static SV **slf_argv;
2482static int slf_argc, slf_arga; /* count, allocated */
2483static I32 slf_ax; /* top of stack, for restore */
2484
2485/* this restores the stack in the case we patched the entersub, to */
2486/* recreate the stack frame as perl will on following calls */
2487/* since entersub cleared the stack */
2488static OP *
2489pp_restore (pTHX)
2490{
2491 int i;
2492 SV **SP = PL_stack_base + slf_ax;
2493
2494 PUSHMARK (SP);
2495
2496 EXTEND (SP, slf_argc + 1);
2497
2498 for (i = 0; i < slf_argc; ++i)
2499 PUSHs (sv_2mortal (slf_argv [i]));
2500
2501 PUSHs ((SV *)CvGV (slf_cv));
2502
2503 RETURNOP (slf_restore.op_first);
2504}
2505
1025static void 2506static void
2507slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2508{
2509 SV **arg = (SV **)slf_frame.data;
2510
2511 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2512}
2513
2514static void
2515slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2516{
2517 if (items != 2)
2518 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2519
2520 frame->prepare = slf_prepare_transfer;
2521 frame->check = slf_check_nop;
2522 frame->data = (void *)arg; /* let's hope it will stay valid */
2523}
2524
2525static void
2526slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2527{
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_nop;
2530}
2531
2532static void
1026prepare_cede (struct transfer_args *ta) 2533slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1027{ 2534{
2535 struct coro *next = (struct coro *)slf_frame.data;
2536
2537 SvREFCNT_inc_NN (next->hv);
2538 prepare_schedule_to (aTHX_ ta, next);
2539}
2540
2541static void
2542slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2543{
2544 if (!items)
2545 croak ("Coro::schedule_to expects a coroutine argument, caught");
2546
2547 frame->data = (void *)SvSTATE (arg [0]);
2548 frame->prepare = slf_prepare_schedule_to;
2549 frame->check = slf_check_nop;
2550}
2551
2552static void
2553slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2554{
1028 api_ready (coro_current); 2555 api_ready (aTHX_ SvRV (coro_current));
1029 2556
1030 prepare_schedule (ta); 2557 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1031} 2558}
1032 2559
1033static void 2560static void
1034api_schedule (void) 2561slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1035{ 2562{
2563 frame->prepare = prepare_cede;
2564 frame->check = slf_check_nop;
2565}
2566
2567static void
2568slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2569{
2570 frame->prepare = prepare_cede_notself;
2571 frame->check = slf_check_nop;
2572}
2573
2574/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2575static void
2576slf_destroy (pTHX_ struct coro *coro)
2577{
2578 /* this callback is reserved for slf functions needing to do cleanup */
2579 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2580 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2581
2582 /*
2583 * The on_destroy above most likely is from an SLF call.
2584 * Since by definition the SLF call will not finish when we destroy
2585 * the coro, we will have to force-finish it here, otherwise
2586 * cleanup functions cannot call SLF functions.
2587 */
2588 coro->slf_frame.prepare = 0;
2589}
2590
2591/*
2592 * these not obviously related functions are all rolled into one
2593 * function to increase chances that they all will call transfer with the same
2594 * stack offset
2595 * SLF stands for "schedule-like-function".
2596 */
2597static OP *
2598pp_slf (pTHX)
2599{
2600 I32 checkmark; /* mark SP to see how many elements check has pushed */
2601
2602 /* set up the slf frame, unless it has already been set-up */
2603 /* the latter happens when a new coro has been started */
2604 /* or when a new cctx was attached to an existing coroutine */
2605 if (ecb_expect_true (!slf_frame.prepare))
2606 {
2607 /* first iteration */
2608 dSP;
2609 SV **arg = PL_stack_base + TOPMARK + 1;
2610 int items = SP - arg; /* args without function object */
2611 SV *gv = *sp;
2612
2613 /* do a quick consistency check on the "function" object, and if it isn't */
2614 /* for us, divert to the real entersub */
2615 if (SvTYPE (gv) != SVt_PVGV
2616 || !GvCV (gv)
2617 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2618 return PL_ppaddr[OP_ENTERSUB](aTHX);
2619
2620 if (!(PL_op->op_flags & OPf_STACKED))
2621 {
2622 /* ampersand-form of call, use @_ instead of stack */
2623 AV *av = GvAV (PL_defgv);
2624 arg = AvARRAY (av);
2625 items = AvFILLp (av) + 1;
2626 }
2627
2628 /* now call the init function, which needs to set up slf_frame */
2629 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2630 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2631
2632 /* pop args */
2633 SP = PL_stack_base + POPMARK;
2634
2635 PUTBACK;
2636 }
2637
2638 /* now that we have a slf_frame, interpret it! */
2639 /* we use a callback system not to make the code needlessly */
2640 /* complicated, but so we can run multiple perl coros from one cctx */
2641
2642 do
2643 {
1036 struct transfer_args ta; 2644 struct coro_transfer_args ta;
1037 2645
1038 prepare_schedule (&ta); 2646 slf_frame.prepare (aTHX_ &ta);
1039 TRANSFER (ta); 2647 TRANSFER (ta, 0);
1040}
1041 2648
2649 checkmark = PL_stack_sp - PL_stack_base;
2650 }
2651 while (slf_frame.check (aTHX_ &slf_frame));
2652
2653 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2654
2655 /* exception handling */
2656 if (ecb_expect_false (CORO_THROW))
2657 {
2658 SV *exception = sv_2mortal (CORO_THROW);
2659
2660 CORO_THROW = 0;
2661 sv_setsv (ERRSV, exception);
2662 croak (0);
2663 }
2664
2665 /* return value handling - mostly like entersub */
2666 /* make sure we put something on the stack in scalar context */
2667 if (GIMME_V == G_SCALAR
2668 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2669 {
2670 dSP;
2671 SV **bot = PL_stack_base + checkmark;
2672
2673 if (sp == bot) /* too few, push undef */
2674 bot [1] = &PL_sv_undef;
2675 else /* too many, take last one */
2676 bot [1] = *sp;
2677
2678 SP = bot + 1;
2679
2680 PUTBACK;
2681 }
2682
2683 return NORMAL;
2684}
2685
2686static void
2687api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2688{
2689 int i;
2690 SV **arg = PL_stack_base + ax;
2691 int items = PL_stack_sp - arg + 1;
2692
2693 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2694
2695 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2696 && PL_op->op_ppaddr != pp_slf)
2697 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2698
2699 CvFLAGS (cv) |= CVf_SLF;
2700 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2701 slf_cv = cv;
2702
2703 /* we patch the op, and then re-run the whole call */
2704 /* we have to put the same argument on the stack for this to work */
2705 /* and this will be done by pp_restore */
2706 slf_restore.op_next = (OP *)&slf_restore;
2707 slf_restore.op_type = OP_CUSTOM;
2708 slf_restore.op_ppaddr = pp_restore;
2709 slf_restore.op_first = PL_op;
2710
2711 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2712
2713 if (PL_op->op_flags & OPf_STACKED)
2714 {
2715 if (items > slf_arga)
2716 {
2717 slf_arga = items;
2718 Safefree (slf_argv);
2719 New (0, slf_argv, slf_arga, SV *);
2720 }
2721
2722 slf_argc = items;
2723
2724 for (i = 0; i < items; ++i)
2725 slf_argv [i] = SvREFCNT_inc (arg [i]);
2726 }
2727 else
2728 slf_argc = 0;
2729
2730 PL_op->op_ppaddr = pp_slf;
2731 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2732
2733 PL_op = (OP *)&slf_restore;
2734}
2735
2736/*****************************************************************************/
2737/* dynamic wind */
2738
2739static void
2740on_enterleave_call (pTHX_ SV *cb)
2741{
2742 dSP;
2743
2744 PUSHSTACK;
2745
2746 PUSHMARK (SP);
2747 PUTBACK;
2748 call_sv (cb, G_VOID | G_DISCARD);
2749 SPAGAIN;
2750
2751 POPSTACK;
2752}
2753
2754static SV *
2755coro_avp_pop_and_free (pTHX_ AV **avp)
2756{
2757 AV *av = *avp;
2758 SV *res = av_pop (av);
2759
2760 if (AvFILLp (av) < 0)
2761 {
2762 *avp = 0;
2763 SvREFCNT_dec (av);
2764 }
2765
2766 return res;
2767}
2768
2769static void
2770coro_pop_on_enter (pTHX_ void *coro)
2771{
2772 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2773 SvREFCNT_dec (cb);
2774}
2775
2776static void
2777coro_pop_on_leave (pTHX_ void *coro)
2778{
2779 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2780 on_enterleave_call (aTHX_ sv_2mortal (cb));
2781}
2782
2783/*****************************************************************************/
2784/* PerlIO::cede */
2785
2786typedef struct
2787{
2788 PerlIOBuf base;
2789 NV next, every;
2790} PerlIOCede;
2791
2792static IV ecb_cold
2793PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2794{
2795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2796
2797 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2798 self->next = nvtime () + self->every;
2799
2800 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2801}
2802
2803static SV * ecb_cold
2804PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2805{
2806 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2807
2808 return newSVnv (self->every);
2809}
2810
2811static IV
2812PerlIOCede_flush (pTHX_ PerlIO *f)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815 double now = nvtime ();
2816
2817 if (now >= self->next)
2818 {
2819 api_cede (aTHX);
2820 self->next = now + self->every;
2821 }
2822
2823 return PerlIOBuf_flush (aTHX_ f);
2824}
2825
2826static PerlIO_funcs PerlIO_cede =
2827{
2828 sizeof(PerlIO_funcs),
2829 "cede",
2830 sizeof(PerlIOCede),
2831 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2832 PerlIOCede_pushed,
2833 PerlIOBuf_popped,
2834 PerlIOBuf_open,
2835 PerlIOBase_binmode,
2836 PerlIOCede_getarg,
2837 PerlIOBase_fileno,
2838 PerlIOBuf_dup,
2839 PerlIOBuf_read,
2840 PerlIOBuf_unread,
2841 PerlIOBuf_write,
2842 PerlIOBuf_seek,
2843 PerlIOBuf_tell,
2844 PerlIOBuf_close,
2845 PerlIOCede_flush,
2846 PerlIOBuf_fill,
2847 PerlIOBase_eof,
2848 PerlIOBase_error,
2849 PerlIOBase_clearerr,
2850 PerlIOBase_setlinebuf,
2851 PerlIOBuf_get_base,
2852 PerlIOBuf_bufsiz,
2853 PerlIOBuf_get_ptr,
2854 PerlIOBuf_get_cnt,
2855 PerlIOBuf_set_ptrcnt,
2856};
2857
2858/*****************************************************************************/
2859/* Coro::Semaphore & Coro::Signal */
2860
2861static SV *
2862coro_waitarray_new (pTHX_ int count)
2863{
2864 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2865 AV *av = newAV ();
2866 SV **ary;
2867
2868 /* unfortunately, building manually saves memory */
2869 Newx (ary, 2, SV *);
2870 AvALLOC (av) = ary;
2871#if PERL_VERSION_ATLEAST (5,10,0)
2872 AvARRAY (av) = ary;
2873#else
2874 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2875 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2876 SvPVX ((SV *)av) = (char *)ary;
2877#endif
2878 AvMAX (av) = 1;
2879 AvFILLp (av) = 0;
2880 ary [0] = newSViv (count);
2881
2882 return newRV_noinc ((SV *)av);
2883}
2884
2885/* semaphore */
2886
2887static void
2888coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2889{
2890 SV *count_sv = AvARRAY (av)[0];
2891 IV count = SvIVX (count_sv);
2892
2893 count += adjust;
2894 SvIVX (count_sv) = count;
2895
2896 /* now wake up as many waiters as are expected to lock */
2897 while (count > 0 && AvFILLp (av) > 0)
2898 {
2899 SV *cb;
2900
2901 /* swap first two elements so we can shift a waiter */
2902 AvARRAY (av)[0] = AvARRAY (av)[1];
2903 AvARRAY (av)[1] = count_sv;
2904 cb = av_shift (av);
2905
2906 if (SvOBJECT (cb))
2907 {
2908 api_ready (aTHX_ cb);
2909 --count;
2910 }
2911 else if (SvTYPE (cb) == SVt_PVCV)
2912 {
2913 dSP;
2914 PUSHMARK (SP);
2915 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2916 PUTBACK;
2917 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2918 }
2919
2920 SvREFCNT_dec (cb);
2921 }
2922}
2923
2924static void
2925coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2926{
2927 /* call $sem->adjust (0) to possibly wake up some other waiters */
2928 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2929}
2930
1042static void 2931static int
1043api_cede (void) 2932slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1044{ 2933{
1045 struct transfer_args ta; 2934 AV *av = (AV *)frame->data;
2935 SV *count_sv = AvARRAY (av)[0];
2936 SV *coro_hv = SvRV (coro_current);
1046 2937
1047 prepare_cede (&ta); 2938 /* if we are about to throw, don't actually acquire the lock, just throw */
1048 TRANSFER (ta); 2939 if (CORO_THROW)
1049} 2940 return 0;
2941 else if (SvIVX (count_sv) > 0)
2942 {
2943 frame->destroy = 0;
1050 2944
2945 if (acquire)
2946 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2947 else
2948 coro_semaphore_adjust (aTHX_ av, 0);
2949
2950 return 0;
2951 }
2952 else
2953 {
2954 int i;
2955 /* if we were woken up but can't down, we look through the whole */
2956 /* waiters list and only add us if we aren't in there already */
2957 /* this avoids some degenerate memory usage cases */
2958 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2959 if (AvARRAY (av)[i] == coro_hv)
2960 return 1;
2961
2962 av_push (av, SvREFCNT_inc (coro_hv));
2963 return 1;
2964 }
2965}
2966
2967static int
2968slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2969{
2970 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2971}
2972
2973static int
2974slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2975{
2976 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2977}
2978
2979static void
2980slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2981{
2982 AV *av = (AV *)SvRV (arg [0]);
2983
2984 if (SvIVX (AvARRAY (av)[0]) > 0)
2985 {
2986 frame->data = (void *)av;
2987 frame->prepare = prepare_nop;
2988 }
2989 else
2990 {
2991 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2992
2993 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2994 frame->prepare = prepare_schedule;
2995 /* to avoid race conditions when a woken-up coro gets terminated */
2996 /* we arrange for a temporary on_destroy that calls adjust (0) */
2997 frame->destroy = coro_semaphore_destroy;
2998 }
2999}
3000
3001static void
3002slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3003{
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_down;
3006}
3007
3008static void
3009slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3010{
3011 if (items >= 2)
3012 {
3013 /* callback form */
3014 AV *av = (AV *)SvRV (arg [0]);
3015 SV *cb_cv = s_get_cv_croak (arg [1]);
3016
3017 av_push (av, SvREFCNT_inc_NN (cb_cv));
3018
3019 if (SvIVX (AvARRAY (av)[0]) > 0)
3020 coro_semaphore_adjust (aTHX_ av, 0);
3021
3022 frame->prepare = prepare_nop;
3023 frame->check = slf_check_nop;
3024 }
3025 else
3026 {
3027 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3028 frame->check = slf_check_semaphore_wait;
3029 }
3030}
3031
3032/* signal */
3033
3034static void
3035coro_signal_wake (pTHX_ AV *av, int count)
3036{
3037 SvIVX (AvARRAY (av)[0]) = 0;
3038
3039 /* now signal count waiters */
3040 while (count > 0 && AvFILLp (av) > 0)
3041 {
3042 SV *cb;
3043
3044 /* swap first two elements so we can shift a waiter */
3045 cb = AvARRAY (av)[0];
3046 AvARRAY (av)[0] = AvARRAY (av)[1];
3047 AvARRAY (av)[1] = cb;
3048
3049 cb = av_shift (av);
3050
3051 if (SvTYPE (cb) == SVt_PVCV)
3052 {
3053 dSP;
3054 PUSHMARK (SP);
3055 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3056 PUTBACK;
3057 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3058 }
3059 else
3060 {
3061 api_ready (aTHX_ cb);
3062 sv_setiv (cb, 0); /* signal waiter */
3063 }
3064
3065 SvREFCNT_dec (cb);
3066
3067 --count;
3068 }
3069}
3070
3071static int
3072slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3073{
3074 /* if we are about to throw, also stop waiting */
3075 return SvROK ((SV *)frame->data) && !CORO_THROW;
3076}
3077
3078static void
3079slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3080{
3081 AV *av = (AV *)SvRV (arg [0]);
3082
3083 if (items >= 2)
3084 {
3085 SV *cb_cv = s_get_cv_croak (arg [1]);
3086 av_push (av, SvREFCNT_inc_NN (cb_cv));
3087
3088 if (SvIVX (AvARRAY (av)[0]))
3089 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3090
3091 frame->prepare = prepare_nop;
3092 frame->check = slf_check_nop;
3093 }
3094 else if (SvIVX (AvARRAY (av)[0]))
3095 {
3096 SvIVX (AvARRAY (av)[0]) = 0;
3097 frame->prepare = prepare_nop;
3098 frame->check = slf_check_nop;
3099 }
3100 else
3101 {
3102 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3103
3104 av_push (av, waiter);
3105
3106 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_signal_wait;
3109 }
3110}
3111
3112/*****************************************************************************/
3113/* Coro::AIO */
3114
3115#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3116
3117/* helper storage struct */
3118struct io_state
3119{
3120 int errorno;
3121 I32 laststype; /* U16 in 5.10.0 */
3122 int laststatval;
3123 Stat_t statcache;
3124};
3125
3126static void
3127coro_aio_callback (pTHX_ CV *cv)
3128{
3129 dXSARGS;
3130 AV *state = (AV *)S_GENSUB_ARG;
3131 SV *coro = av_pop (state);
3132 SV *data_sv = newSV (sizeof (struct io_state));
3133
3134 av_extend (state, items - 1);
3135
3136 sv_upgrade (data_sv, SVt_PV);
3137 SvCUR_set (data_sv, sizeof (struct io_state));
3138 SvPOK_only (data_sv);
3139
3140 {
3141 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3142
3143 data->errorno = errno;
3144 data->laststype = PL_laststype;
3145 data->laststatval = PL_laststatval;
3146 data->statcache = PL_statcache;
3147 }
3148
3149 /* now build the result vector out of all the parameters and the data_sv */
3150 {
3151 int i;
3152
3153 for (i = 0; i < items; ++i)
3154 av_push (state, SvREFCNT_inc_NN (ST (i)));
3155 }
3156
3157 av_push (state, data_sv);
3158
3159 api_ready (aTHX_ coro);
3160 SvREFCNT_dec (coro);
3161 SvREFCNT_dec ((AV *)state);
3162}
3163
3164static int
3165slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3166{
3167 AV *state = (AV *)frame->data;
3168
3169 /* if we are about to throw, return early */
3170 /* this does not cancel the aio request, but at least */
3171 /* it quickly returns */
3172 if (CORO_THROW)
3173 return 0;
3174
3175 /* one element that is an RV? repeat! */
3176 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3177 return 1;
3178
3179 /* restore status */
3180 {
3181 SV *data_sv = av_pop (state);
3182 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3183
3184 errno = data->errorno;
3185 PL_laststype = data->laststype;
3186 PL_laststatval = data->laststatval;
3187 PL_statcache = data->statcache;
3188
3189 SvREFCNT_dec (data_sv);
3190 }
3191
3192 /* push result values */
3193 {
3194 dSP;
3195 int i;
3196
3197 EXTEND (SP, AvFILLp (state) + 1);
3198 for (i = 0; i <= AvFILLp (state); ++i)
3199 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3200
3201 PUTBACK;
3202 }
3203
3204 return 0;
3205}
3206
3207static void
3208slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3209{
3210 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3211 SV *coro_hv = SvRV (coro_current);
3212 struct coro *coro = SvSTATE_hv (coro_hv);
3213
3214 /* put our coroutine id on the state arg */
3215 av_push (state, SvREFCNT_inc_NN (coro_hv));
3216
3217 /* first see whether we have a non-zero priority and set it as AIO prio */
3218 if (coro->prio)
3219 {
3220 dSP;
3221
3222 static SV *prio_cv;
3223 static SV *prio_sv;
3224
3225 if (ecb_expect_false (!prio_cv))
3226 {
3227 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3228 prio_sv = newSViv (0);
3229 }
3230
3231 PUSHMARK (SP);
3232 sv_setiv (prio_sv, coro->prio);
3233 XPUSHs (prio_sv);
3234
3235 PUTBACK;
3236 call_sv (prio_cv, G_VOID | G_DISCARD);
3237 }
3238
3239 /* now call the original request */
3240 {
3241 dSP;
3242 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3243 int i;
3244
3245 PUSHMARK (SP);
3246
3247 /* first push all args to the stack */
3248 EXTEND (SP, items + 1);
3249
3250 for (i = 0; i < items; ++i)
3251 PUSHs (arg [i]);
3252
3253 /* now push the callback closure */
3254 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3255
3256 /* now call the AIO function - we assume our request is uncancelable */
3257 PUTBACK;
3258 call_sv ((SV *)req, G_VOID | G_DISCARD);
3259 }
3260
3261 /* now that the request is going, we loop till we have a result */
3262 frame->data = (void *)state;
3263 frame->prepare = prepare_schedule;
3264 frame->check = slf_check_aio_req;
3265}
3266
3267static void
3268coro_aio_req_xs (pTHX_ CV *cv)
3269{
3270 dXSARGS;
3271
3272 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3273
3274 XSRETURN_EMPTY;
3275}
3276
3277/*****************************************************************************/
3278
3279#if CORO_CLONE
3280# include "clone.c"
3281#endif
3282
3283/*****************************************************************************/
3284
3285static SV *
3286coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3287{
3288 SV *coro_sv;
3289 struct coro *coro;
3290 MAGIC *mg;
3291 HV *hv;
3292 SV *cb;
3293 int i;
3294
3295 if (argc > 0)
3296 {
3297 cb = s_get_cv_croak (argv [0]);
3298
3299 if (!is_coro)
3300 {
3301 if (CvISXSUB (cb))
3302 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3303
3304 if (!CvROOT (cb))
3305 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3306 }
3307 }
3308
3309 Newz (0, coro, 1, struct coro);
3310 coro->args = newAV ();
3311 coro->flags = CF_NEW;
3312
3313 if (coro_first) coro_first->prev = coro;
3314 coro->next = coro_first;
3315 coro_first = coro;
3316
3317 coro->hv = hv = newHV ();
3318 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3319 mg->mg_flags |= MGf_DUP;
3320 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3321
3322 if (argc > 0)
3323 {
3324 av_extend (coro->args, argc + is_coro - 1);
3325
3326 if (is_coro)
3327 {
3328 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3329 cb = (SV *)cv_coro_run;
3330 }
3331
3332 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3333
3334 for (i = 1; i < argc; i++)
3335 av_push (coro->args, newSVsv (argv [i]));
3336 }
3337
3338 return coro_sv;
3339}
3340
3341#ifndef __cplusplus
3342ecb_cold XS(boot_Coro__State);
3343#endif
3344
3345#if CORO_JIT
3346
3347static void ecb_noinline ecb_cold
3348pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3349{
3350 dSP;
3351 AV *av = newAV ();
3352
3353 av_store (av, 3, newSVuv (d));
3354 av_store (av, 2, newSVuv (c));
3355 av_store (av, 1, newSVuv (b));
3356 av_store (av, 0, newSVuv (a));
3357
3358 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3359
3360 PUTBACK;
3361}
3362
3363static void ecb_noinline ecb_cold
3364jit_init (pTHX)
3365{
3366 dSP;
3367 SV *load, *save;
3368 char *map_base;
3369 char *load_ptr, *save_ptr;
3370 STRLEN load_len, save_len, map_len;
3371 int count;
3372
3373 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3374
3375 PUSHMARK (SP);
3376#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3377# include "state.h"
3378#undef VARx
3379 count = call_pv ("Coro::State::_jit", G_ARRAY);
3380 SPAGAIN;
3381
3382 save = POPs; save_ptr = SvPVbyte (save, save_len);
3383 load = POPs; load_ptr = SvPVbyte (load, load_len);
3384
3385 map_len = load_len + save_len + 16;
3386
3387 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3388
3389 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3390
3391 load_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, load_ptr, load_len);
3393
3394 map_base += (load_len + 15) & ~15;
3395
3396 save_perl_slots = (load_save_perl_slots_type)map_base;
3397 memcpy (map_base, save_ptr, save_len);
3398
3399 /* we are good citizens and try to make the page read-only, so the evil evil */
3400 /* hackers might have it a bit more difficult */
3401 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3402
3403 PUTBACK;
3404 eval_pv ("undef &Coro::State::_jit", 1);
3405}
3406
3407#endif
3408
1051MODULE = Coro::State PACKAGE = Coro::State 3409MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052 3410
1053PROTOTYPES: DISABLE 3411PROTOTYPES: DISABLE
1054 3412
1055BOOT: 3413BOOT:
1056{ 3414{
1057#ifdef USE_ITHREADS 3415#ifdef USE_ITHREADS
1058 MUTEX_INIT (&coro_mutex); 3416# if CORO_PTHREAD
3417 coro_thx = PERL_GET_CONTEXT;
3418# endif
1059#endif 3419#endif
1060 BOOT_PAGESIZE; 3420 BOOT_PAGESIZE;
1061 3421
3422 /* perl defines these to check for existance first, but why it doesn't */
3423 /* just create them one at init time is not clear to me, except for */
3424 /* programs trying to delete them, but... */
3425 /* anyway, we declare this as invalid and make sure they are initialised here */
3426 DEFSV;
3427 ERRSV;
3428
3429 cctx_current = cctx_new_empty ();
3430
3431 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3432 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3433
3434 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3435 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3436 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3437
3438 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3439 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3440 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3441
1062 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3442 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063 3443
3444 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3445 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3446 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1065 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1066 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1068 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3447 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069 3448
1070 main_mainstack = PL_mainstack; 3449 main_mainstack = PL_mainstack;
3450 main_top_env = PL_top_env;
1071 3451
3452 while (main_top_env->je_prev)
3453 main_top_env = main_top_env->je_prev;
3454
3455 {
3456 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3457
3458 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3459 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3460
3461 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3462 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3463 }
3464
1072 coroapi.ver = CORO_API_VERSION; 3465 coroapi.ver = CORO_API_VERSION;
3466 coroapi.rev = CORO_API_REVISION;
3467
1073 coroapi.transfer = api_transfer; 3468 coroapi.transfer = api_transfer;
1074 3469
3470 coroapi.sv_state = SvSTATE_;
3471 coroapi.execute_slf = api_execute_slf;
3472 coroapi.prepare_nop = prepare_nop;
3473 coroapi.prepare_schedule = prepare_schedule;
3474 coroapi.prepare_cede = prepare_cede;
3475 coroapi.prepare_cede_notself = prepare_cede_notself;
3476
3477 time_init (aTHX);
3478
1075 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3479 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3480#if CORO_JIT
3481 PUTBACK;
3482 jit_init (aTHX);
3483 SPAGAIN;
3484#endif
1076} 3485}
1077 3486
1078SV * 3487SV *
1079new (char *klass, ...) 3488new (SV *klass, ...)
3489 ALIAS:
3490 Coro::new = 1
1080 CODE: 3491 CODE:
1081{ 3492 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1082 struct coro *coro;
1083 HV *hv;
1084 int i;
1085
1086 Newz (0, coro, 1, struct coro);
1087 coro->args = newAV ();
1088 coro->save = CORO_SAVE_ALL;
1089 coro->flags = CF_NEW;
1090
1091 hv = newHV ();
1092 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1093 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1094
1095 for (i = 1; i < items; i++)
1096 av_push (coro->args, newSVsv (ST (i)));
1097}
1098 OUTPUT:
1099 RETVAL
1100
1101int
1102save (SV *coro, int new_save = -1)
1103 CODE:
1104 RETVAL = api_save (coro, new_save);
1105 OUTPUT: 3493 OUTPUT:
1106 RETVAL 3494 RETVAL
1107 3495
1108void 3496void
1109_set_stacklevel (...) 3497transfer (...)
1110 ALIAS: 3498 PROTOTYPE: $$
1111 Coro::State::transfer = 1 3499 CODE:
1112 Coro::schedule = 2 3500 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1113 Coro::cede = 3
1114 CODE:
1115{
1116 struct transfer_args ta;
1117
1118 switch (ix)
1119 {
1120 case 0:
1121 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1122 ta.next = 0;
1123 break;
1124
1125 case 1:
1126 if (items != 2)
1127 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1128
1129 prepare_transfer (&ta, ST (0), ST (1));
1130 break;
1131
1132 case 2:
1133 prepare_schedule (&ta);
1134 break;
1135
1136 case 3:
1137 prepare_cede (&ta);
1138 break;
1139 }
1140
1141 TRANSFER (ta);
1142}
1143 3501
1144void 3502void
1145_clone_state_from (SV *dst, SV *src)
1146 CODE:
1147{
1148 struct coro *coro_src = SvSTATE (src);
1149
1150 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1151
1152 ++coro_src->refcnt;
1153 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1154}
1155
1156void
1157_exit (code) 3503_exit (int code)
1158 int code
1159 PROTOTYPE: $ 3504 PROTOTYPE: $
1160 CODE: 3505 CODE:
1161 _exit (code); 3506 _exit (code);
1162 3507
3508SV *
3509clone (Coro::State coro)
3510 CODE:
3511{
3512#if CORO_CLONE
3513 struct coro *ncoro = coro_clone (aTHX_ coro);
3514 MAGIC *mg;
3515 /* TODO: too much duplication */
3516 ncoro->hv = newHV ();
3517 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3518 mg->mg_flags |= MGf_DUP;
3519 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3520#else
3521 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3522#endif
3523}
3524 OUTPUT:
3525 RETVAL
3526
3527int
3528cctx_stacksize (int new_stacksize = 0)
3529 PROTOTYPE: ;$
3530 CODE:
3531 RETVAL = cctx_stacksize;
3532 if (new_stacksize)
3533 {
3534 cctx_stacksize = new_stacksize;
3535 ++cctx_gen;
3536 }
3537 OUTPUT:
3538 RETVAL
3539
3540int
3541cctx_max_idle (int max_idle = 0)
3542 PROTOTYPE: ;$
3543 CODE:
3544 RETVAL = cctx_max_idle;
3545 if (max_idle > 1)
3546 cctx_max_idle = max_idle;
3547 OUTPUT:
3548 RETVAL
3549
1163int 3550int
1164cctx_count () 3551cctx_count ()
3552 PROTOTYPE:
1165 CODE: 3553 CODE:
1166 RETVAL = cctx_count; 3554 RETVAL = cctx_count;
1167 OUTPUT: 3555 OUTPUT:
1168 RETVAL 3556 RETVAL
1169 3557
1170int 3558int
1171cctx_idle () 3559cctx_idle ()
3560 PROTOTYPE:
1172 CODE: 3561 CODE:
1173 RETVAL = cctx_idle; 3562 RETVAL = cctx_idle;
1174 OUTPUT: 3563 OUTPUT:
1175 RETVAL 3564 RETVAL
1176 3565
3566void
3567list ()
3568 PROTOTYPE:
3569 PPCODE:
3570{
3571 struct coro *coro;
3572 for (coro = coro_first; coro; coro = coro->next)
3573 if (coro->hv)
3574 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3575}
3576
3577void
3578call (Coro::State coro, SV *coderef)
3579 ALIAS:
3580 eval = 1
3581 CODE:
3582{
3583 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3584 {
3585 struct coro *current = SvSTATE_current;
3586 struct CoroSLF slf_save;
3587
3588 if (current != coro)
3589 {
3590 PUTBACK;
3591 save_perl (aTHX_ current);
3592 load_perl (aTHX_ coro);
3593 /* the coro is most likely in an active SLF call.
3594 * while not strictly required (the code we execute is
3595 * not allowed to call any SLF functions), it's cleaner
3596 * to reinitialise the slf_frame and restore it later.
3597 * This might one day allow us to actually do SLF calls
3598 * from code executed here.
3599 */
3600 slf_save = slf_frame;
3601 slf_frame.prepare = 0;
3602 SPAGAIN;
3603 }
3604
3605 PUSHSTACK;
3606
3607 PUSHMARK (SP);
3608 PUTBACK;
3609
3610 if (ix)
3611 eval_sv (coderef, 0);
3612 else
3613 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3614
3615 POPSTACK;
3616 SPAGAIN;
3617
3618 if (current != coro)
3619 {
3620 PUTBACK;
3621 slf_frame = slf_save;
3622 save_perl (aTHX_ coro);
3623 load_perl (aTHX_ current);
3624 SPAGAIN;
3625 }
3626 }
3627}
3628
3629SV *
3630is_ready (Coro::State coro)
3631 PROTOTYPE: $
3632 ALIAS:
3633 is_ready = CF_READY
3634 is_running = CF_RUNNING
3635 is_new = CF_NEW
3636 is_destroyed = CF_ZOMBIE
3637 is_zombie = CF_ZOMBIE
3638 is_suspended = CF_SUSPENDED
3639 CODE:
3640 RETVAL = boolSV (coro->flags & ix);
3641 OUTPUT:
3642 RETVAL
3643
3644void
3645throw (Coro::State self, SV *exception = &PL_sv_undef)
3646 PROTOTYPE: $;$
3647 CODE:
3648{
3649 struct coro *current = SvSTATE_current;
3650 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3651 SvREFCNT_dec (*exceptionp);
3652 SvGETMAGIC (exception);
3653 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3654}
3655
3656void
3657api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3658 PROTOTYPE: $;$
3659 C_ARGS: aTHX_ coro, flags
3660
3661SV *
3662has_cctx (Coro::State coro)
3663 PROTOTYPE: $
3664 CODE:
3665 /* maybe manage the running flag differently */
3666 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3667 OUTPUT:
3668 RETVAL
3669
3670int
3671is_traced (Coro::State coro)
3672 PROTOTYPE: $
3673 CODE:
3674 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3675 OUTPUT:
3676 RETVAL
3677
3678UV
3679rss (Coro::State coro)
3680 PROTOTYPE: $
3681 ALIAS:
3682 usecount = 1
3683 CODE:
3684 switch (ix)
3685 {
3686 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3687 case 1: RETVAL = coro->usecount; break;
3688 }
3689 OUTPUT:
3690 RETVAL
3691
3692void
3693force_cctx ()
3694 PROTOTYPE:
3695 CODE:
3696 cctx_current->idle_sp = 0;
3697
3698void
3699swap_defsv (Coro::State self)
3700 PROTOTYPE: $
3701 ALIAS:
3702 swap_defav = 1
3703 CODE:
3704 if (!self->slot)
3705 croak ("cannot swap state with coroutine that has no saved state,");
3706 else
3707 {
3708 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3709 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3710
3711 SV *tmp = *src; *src = *dst; *dst = tmp;
3712 }
3713
3714void
3715cancel (Coro::State self)
3716 CODE:
3717 coro_state_destroy (aTHX_ self);
3718
3719SV *
3720enable_times (int enabled = enable_times)
3721 CODE:
3722{
3723 RETVAL = boolSV (enable_times);
3724
3725 if (enabled != enable_times)
3726 {
3727 enable_times = enabled;
3728
3729 coro_times_update ();
3730 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3731 }
3732}
3733 OUTPUT:
3734 RETVAL
3735
3736void
3737times (Coro::State self)
3738 PPCODE:
3739{
3740 struct coro *current = SvSTATE (coro_current);
3741
3742 if (ecb_expect_false (current == self))
3743 {
3744 coro_times_update ();
3745 coro_times_add (SvSTATE (coro_current));
3746 }
3747
3748 EXTEND (SP, 2);
3749 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3750 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3751
3752 if (ecb_expect_false (current == self))
3753 coro_times_sub (SvSTATE (coro_current));
3754}
3755
3756void
3757swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3758 CODE:
3759{
3760 struct coro *current = SvSTATE_current;
3761
3762 if (current == coro)
3763 SWAP_SVS (current);
3764
3765 if (!coro->swap_sv)
3766 coro->swap_sv = newAV ();
3767
3768 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3769 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3770
3771 if (current == coro)
3772 SWAP_SVS (current);
3773}
3774
3775
1177MODULE = Coro::State PACKAGE = Coro 3776MODULE = Coro::State PACKAGE = Coro
1178 3777
1179BOOT: 3778BOOT:
1180{ 3779{
1181 int i; 3780 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3781 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3782 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3783 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3784 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3785 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3786 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3787 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1182 3788
3789 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3790 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3791 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3792 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3793
1183 coro_stash = gv_stashpv ("Coro", TRUE); 3794 coro_stash = gv_stashpv ("Coro", TRUE);
1184 3795
1185 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3796 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1186 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3797 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1187 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3798 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1188 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3799 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1189 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3800 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1190 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3801 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1191
1192 coro_current = get_sv ("Coro::current", FALSE);
1193 SvREADONLY_on (coro_current);
1194
1195 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1196 coro_ready[i] = newAV ();
1197 3802
1198 { 3803 {
1199 SV *sv = perl_get_sv("Coro::API", 1); 3804 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1200 3805
1201 coroapi.schedule = api_schedule; 3806 coroapi.schedule = api_schedule;
1202 coroapi.save = api_save; 3807 coroapi.schedule_to = api_schedule_to;
1203 coroapi.cede = api_cede; 3808 coroapi.cede = api_cede;
3809 coroapi.cede_notself = api_cede_notself;
1204 coroapi.ready = api_ready; 3810 coroapi.ready = api_ready;
1205 coroapi.is_ready = api_is_ready; 3811 coroapi.is_ready = api_is_ready;
1206 coroapi.nready = &coro_nready; 3812 coroapi.nready = coro_nready;
1207 coroapi.current = coro_current; 3813 coroapi.current = coro_current;
1208 3814
1209 GCoroAPI = &coroapi; 3815 /*GCoroAPI = &coroapi;*/
1210 sv_setiv (sv, (IV)&coroapi); 3816 sv_setiv (sv, (IV)&coroapi);
1211 SvREADONLY_on (sv); 3817 SvREADONLY_on (sv);
1212 } 3818 }
1213} 3819}
3820
3821SV *
3822async (...)
3823 PROTOTYPE: &@
3824 CODE:
3825 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3826 api_ready (aTHX_ RETVAL);
3827 OUTPUT:
3828 RETVAL
3829
3830void
3831_destroy (Coro::State coro)
3832 CODE:
3833 /* used by the manager thread */
3834 coro_state_destroy (aTHX_ coro);
3835
3836void
3837on_destroy (Coro::State coro, SV *cb)
3838 CODE:
3839 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3840
3841void
3842join (...)
3843 CODE:
3844 CORO_EXECUTE_SLF_XS (slf_init_join);
3845
3846void
3847terminate (...)
3848 CODE:
3849 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3850
3851void
3852cancel (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3855
3856int
3857safe_cancel (Coro::State self, ...)
3858 C_ARGS: aTHX_ self, &ST (1), items - 1
3859
3860void
3861schedule (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3864
3865void
3866schedule_to (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3869
3870void
3871cede_to (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3874
3875void
3876cede (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_cede);
3879
3880void
3881cede_notself (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1214 3884
1215void 3885void
1216_set_current (SV *current) 3886_set_current (SV *current)
1217 PROTOTYPE: $ 3887 PROTOTYPE: $
1218 CODE: 3888 CODE:
1219 SvREFCNT_dec (SvRV (coro_current)); 3889 SvREFCNT_dec (SvRV (coro_current));
1220 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3890 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3891
3892void
3893_set_readyhook (SV *hook)
3894 PROTOTYPE: $
3895 CODE:
3896 SvREFCNT_dec (coro_readyhook);
3897 SvGETMAGIC (hook);
3898 if (SvOK (hook))
3899 {
3900 coro_readyhook = newSVsv (hook);
3901 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3902 }
3903 else
3904 {
3905 coro_readyhook = 0;
3906 CORO_READYHOOK = 0;
3907 }
1221 3908
1222int 3909int
1223prio (Coro::State coro, int newprio = 0) 3910prio (Coro::State coro, int newprio = 0)
3911 PROTOTYPE: $;$
1224 ALIAS: 3912 ALIAS:
1225 nice = 1 3913 nice = 1
1226 CODE: 3914 CODE:
1227{ 3915{
1228 RETVAL = coro->prio; 3916 RETVAL = coro->prio;
1229 3917
1230 if (items > 1) 3918 if (items > 1)
1231 { 3919 {
1232 if (ix) 3920 if (ix)
1233 newprio += coro->prio; 3921 newprio = coro->prio - newprio;
1234 3922
1235 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3923 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1236 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3924 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1237 3925
1238 coro->prio = newprio; 3926 coro->prio = newprio;
1239 } 3927 }
1240} 3928}
3929 OUTPUT:
3930 RETVAL
1241 3931
1242SV * 3932SV *
1243ready (SV *self) 3933ready (SV *self)
1244 PROTOTYPE: $ 3934 PROTOTYPE: $
1245 CODE: 3935 CODE:
1246 RETVAL = boolSV (api_ready (self)); 3936 RETVAL = boolSV (api_ready (aTHX_ self));
1247 OUTPUT:
1248 RETVAL
1249
1250SV *
1251is_ready (SV *self)
1252 PROTOTYPE: $
1253 CODE:
1254 RETVAL = boolSV (api_is_ready (self));
1255 OUTPUT: 3937 OUTPUT:
1256 RETVAL 3938 RETVAL
1257 3939
1258int 3940int
1259nready (...) 3941nready (...)
… …
1261 CODE: 3943 CODE:
1262 RETVAL = coro_nready; 3944 RETVAL = coro_nready;
1263 OUTPUT: 3945 OUTPUT:
1264 RETVAL 3946 RETVAL
1265 3947
1266MODULE = Coro::State PACKAGE = Coro::AIO 3948void
3949suspend (Coro::State self)
3950 PROTOTYPE: $
3951 CODE:
3952 self->flags |= CF_SUSPENDED;
3953
3954void
3955resume (Coro::State self)
3956 PROTOTYPE: $
3957 CODE:
3958 self->flags &= ~CF_SUSPENDED;
3959
3960void
3961_pool_handler (...)
3962 CODE:
3963 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3964
3965void
3966async_pool (SV *cv, ...)
3967 PROTOTYPE: &@
3968 PPCODE:
3969{
3970 HV *hv = (HV *)av_pop (av_async_pool);
3971 AV *av = newAV ();
3972 SV *cb = ST (0);
3973 int i;
3974
3975 av_extend (av, items - 2);
3976 for (i = 1; i < items; ++i)
3977 av_push (av, SvREFCNT_inc_NN (ST (i)));
3978
3979 if ((SV *)hv == &PL_sv_undef)
3980 {
3981 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3982 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3983 SvREFCNT_dec (sv);
3984 }
3985
3986 {
3987 struct coro *coro = SvSTATE_hv (hv);
3988
3989 assert (!coro->invoke_cb);
3990 assert (!coro->invoke_av);
3991 coro->invoke_cb = SvREFCNT_inc (cb);
3992 coro->invoke_av = av;
3993 }
3994
3995 api_ready (aTHX_ (SV *)hv);
3996
3997 if (GIMME_V != G_VOID)
3998 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3999 else
4000 SvREFCNT_dec (hv);
4001}
1267 4002
1268SV * 4003SV *
1269_get_state () 4004rouse_cb ()
4005 PROTOTYPE:
1270 CODE: 4006 CODE:
1271{ 4007 RETVAL = coro_new_rouse_cb (aTHX);
1272 struct io_state *data;
1273
1274 RETVAL = newSV (sizeof (struct io_state));
1275 data = (struct io_state *)SvPVX (RETVAL);
1276 SvCUR_set (RETVAL, sizeof (struct io_state));
1277 SvPOK_only (RETVAL);
1278
1279 data->errorno = errno;
1280 data->laststype = PL_laststype;
1281 data->laststatval = PL_laststatval;
1282 data->statcache = PL_statcache;
1283}
1284 OUTPUT: 4008 OUTPUT:
1285 RETVAL 4009 RETVAL
1286 4010
1287void 4011void
1288_set_state (char *data_) 4012rouse_wait (...)
4013 PROTOTYPE: ;$
4014 PPCODE:
4015 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4016
4017void
4018on_enter (SV *block)
4019 ALIAS:
4020 on_leave = 1
1289 PROTOTYPE: $ 4021 PROTOTYPE: &
1290 CODE: 4022 CODE:
1291{ 4023{
1292 struct io_state *data = (void *)data_; 4024 struct coro *coro = SvSTATE_current;
4025 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1293 4026
1294 errno = data->errorno; 4027 block = s_get_cv_croak (block);
1295 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache;
1298}
1299 4028
4029 if (!*avp)
4030 *avp = newAV ();
4031
4032 av_push (*avp, SvREFCNT_inc (block));
4033
4034 if (!ix)
4035 on_enterleave_call (aTHX_ block);
4036
4037 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4038 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4039 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4040}
4041
4042
4043MODULE = Coro::State PACKAGE = PerlIO::cede
4044
4045BOOT:
4046 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4047
4048
4049MODULE = Coro::State PACKAGE = Coro::Semaphore
4050
4051SV *
4052new (SV *klass, SV *count = 0)
4053 CODE:
4054{
4055 int semcnt = 1;
4056
4057 if (count)
4058 {
4059 SvGETMAGIC (count);
4060
4061 if (SvOK (count))
4062 semcnt = SvIV (count);
4063 }
4064
4065 RETVAL = sv_bless (
4066 coro_waitarray_new (aTHX_ semcnt),
4067 GvSTASH (CvGV (cv))
4068 );
4069}
4070 OUTPUT:
4071 RETVAL
4072
4073# helper for Coro::Channel and others
4074SV *
4075_alloc (int count)
4076 CODE:
4077 RETVAL = coro_waitarray_new (aTHX_ count);
4078 OUTPUT:
4079 RETVAL
4080
4081SV *
4082count (SV *self)
4083 CODE:
4084 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4085 OUTPUT:
4086 RETVAL
4087
4088void
4089up (SV *self, int adjust = 1)
4090 ALIAS:
4091 adjust = 1
4092 CODE:
4093 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4094
4095void
4096down (...)
4097 CODE:
4098 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4099
4100void
4101wait (...)
4102 CODE:
4103 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4104
4105void
4106try (SV *self)
4107 PPCODE:
4108{
4109 AV *av = (AV *)SvRV (self);
4110 SV *count_sv = AvARRAY (av)[0];
4111 IV count = SvIVX (count_sv);
4112
4113 if (count > 0)
4114 {
4115 --count;
4116 SvIVX (count_sv) = count;
4117 XSRETURN_YES;
4118 }
4119 else
4120 XSRETURN_NO;
4121}
4122
4123void
4124waiters (SV *self)
4125 PPCODE:
4126{
4127 AV *av = (AV *)SvRV (self);
4128 int wcount = AvFILLp (av) + 1 - 1;
4129
4130 if (GIMME_V == G_SCALAR)
4131 XPUSHs (sv_2mortal (newSViv (wcount)));
4132 else
4133 {
4134 int i;
4135 EXTEND (SP, wcount);
4136 for (i = 1; i <= wcount; ++i)
4137 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4138 }
4139}
4140
4141MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4142
4143void
4144_may_delete (SV *sem, int count, int extra_refs)
4145 PPCODE:
4146{
4147 AV *av = (AV *)SvRV (sem);
4148
4149 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4150 && AvFILLp (av) == 0 /* no waiters, just count */
4151 && SvIV (AvARRAY (av)[0]) == count)
4152 XSRETURN_YES;
4153
4154 XSRETURN_NO;
4155}
4156
4157MODULE = Coro::State PACKAGE = Coro::Signal
4158
4159SV *
4160new (SV *klass)
4161 CODE:
4162 RETVAL = sv_bless (
4163 coro_waitarray_new (aTHX_ 0),
4164 GvSTASH (CvGV (cv))
4165 );
4166 OUTPUT:
4167 RETVAL
4168
4169void
4170wait (...)
4171 CODE:
4172 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4173
4174void
4175broadcast (SV *self)
4176 CODE:
4177{
4178 AV *av = (AV *)SvRV (self);
4179 coro_signal_wake (aTHX_ av, AvFILLp (av));
4180}
4181
4182void
4183send (SV *self)
4184 CODE:
4185{
4186 AV *av = (AV *)SvRV (self);
4187
4188 if (AvFILLp (av))
4189 coro_signal_wake (aTHX_ av, 1);
4190 else
4191 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4192}
4193
4194IV
4195awaited (SV *self)
4196 CODE:
4197 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4198 OUTPUT:
4199 RETVAL
4200
4201
4202MODULE = Coro::State PACKAGE = Coro::AnyEvent
4203
4204BOOT:
4205 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4206
4207void
4208_schedule (...)
4209 CODE:
4210{
4211 static int incede;
4212
4213 api_cede_notself (aTHX);
4214
4215 ++incede;
4216 while (coro_nready >= incede && api_cede (aTHX))
4217 ;
4218
4219 sv_setsv (sv_activity, &PL_sv_undef);
4220 if (coro_nready >= incede)
4221 {
4222 PUSHMARK (SP);
4223 PUTBACK;
4224 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4225 }
4226
4227 --incede;
4228}
4229
4230
4231MODULE = Coro::State PACKAGE = Coro::AIO
4232
4233void
4234_register (char *target, char *proto, SV *req)
4235 CODE:
4236{
4237 SV *req_cv = s_get_cv_croak (req);
4238 /* newXSproto doesn't return the CV on 5.8 */
4239 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4240 sv_setpv ((SV *)slf_cv, proto);
4241 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4242}
4243
4244MODULE = Coro::State PACKAGE = Coro::Select
4245
4246void
4247patch_pp_sselect ()
4248 CODE:
4249 if (!coro_old_pp_sselect)
4250 {
4251 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4252 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4253 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4254 }
4255
4256void
4257unpatch_pp_sselect ()
4258 CODE:
4259 if (coro_old_pp_sselect)
4260 {
4261 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4262 coro_old_pp_sselect = 0;
4263 }
4264

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