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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 1.395 by root, Fri May 6 07:22:14 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"
8 17
9#include <stdio.h> 18#include <stdio.h>
10#include <errno.h> 19#include <errno.h>
11#include <assert.h> 20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
34#endif
12 35
13#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
14# include <unistd.h> 37# include <unistd.h>
15# include <sys/mman.h> 38# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
31#else 54#else
32# define PAGESIZE 0 55# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 56# define BOOT_PAGESIZE (void)0
34#endif 57#endif
35 58
36#if USE_VALGRIND 59#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 60# include <valgrind/valgrind.h>
38#endif 61#endif
39 62
40/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 64static int cctx_max_idle = 4;
42 65
43#define PERL_VERSION_ATLEAST(a,b,c) \ 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44 (PERL_REVISION > (a) \ 67# 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 68#endif
53# ifndef call_sv 69
54# define call_sv perl_call_sv 70#ifndef CORO_STACKGUARD
71# define CORO_STACKGUARD 0
55# endif 72#endif
56# ifndef get_sv 73
57# define get_sv perl_get_sv 74/* prefer perl internal functions over our own? */
75#ifndef CORO_PREFER_PERL_FUNCTIONS
76# define CORO_PREFER_PERL_FUNCTIONS 0
58# endif 77#endif
59# ifndef get_cv 78
60# define get_cv perl_get_cv 79/* The next macros try to return the current stack pointer, in an as
80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
85# define dSTACKLEVEL volatile void *stacklevel
86# define STACKLEVEL ((void *)&stacklevel)
61# endif 87#endif
62# ifndef IS_PADGV 88
63# define IS_PADGV(v) 0 89#define IN_DESTRUCT PL_dirty
90
91#if __GNUC__ >= 3
92# define attribute(x) __attribute__(x)
93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
95#else
96# define attribute(x)
97# define expect(expr,value) (expr)
98# define INLINE static
64# endif 99#endif
65# ifndef IS_PADCONST 100
66# define IS_PADCONST(v) 0 101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
104#define NOINLINE attribute ((noinline))
105
106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
108
109#ifdef USE_ITHREADS
110# if CORO_PTHREAD
111static void *coro_thx;
67# endif 112# endif
68#endif 113#endif
69 114
70/* 5.8.7 */ 115#ifdef __linux
71#ifndef SvRV_set 116# include <time.h> /* for timespec */
72# define SvRV_set(s,v) SvRV(s) = (v) 117# include <syscall.h> /* for SYS_* */
118# ifdef SYS_clock_gettime
119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
120# define CORO_CLOCK_MONOTONIC 1
121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
122# endif
73#endif 123#endif
74 124
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 125static double (*nvtime)(); /* so why doesn't it take void? */
76# undef STACKGUARD 126static void (*u2time)(pTHX_ UV ret[2]);
77#endif
78 127
79#ifndef STACKGUARD 128/* we hijack an hopefully unused CV flag for our purposes */
80# define STACKGUARD 0 129#define CVf_SLF 0x4000
81#endif 130static OP *pp_slf (pTHX);
82 131
83/* prefer perl internal functions over our own? */ 132static U32 cctx_gen;
84#ifndef PREFER_PERL_FUNCTIONS 133static 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; 134static struct CoroAPI coroapi;
124static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
136static JMPENV *main_top_env;
125static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
126static SV *coro_mortal; /* will be freed after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
149
150/* async_pool helper stuff */
151static SV *sv_pool_rss;
152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
157
158/* Coro::AnyEvent */
159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
127 166
128static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
129static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
130 169
170enum {
171 CC_MAPPED = 0x01,
172 CC_NOREUSE = 0x02, /* throw this away after tracing */
173 CC_TRACE = 0x04,
174 CC_TRACE_SUB = 0x08, /* trace sub calls */
175 CC_TRACE_LINE = 0x10, /* trace each statement */
176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
177};
178
131/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
132typedef struct coro_cctx { 180typedef struct coro_cctx
181{
133 struct coro_cctx *next; 182 struct coro_cctx *next;
134 183
135 /* the stack */ 184 /* the stack */
136 void *sptr; 185 void *sptr;
137 long ssize; /* positive == mmap, otherwise malloc */ 186 size_t ssize;
138 187
139 /* cpu state */ 188 /* cpu state */
140 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141 JMPENV *top_env; 191 JMPENV *top_env;
142 coro_context cctx; 192 coro_context cctx;
143 193
144 int inuse; 194 U32 gen;
145
146#if USE_VALGRIND 195#if CORO_USE_VALGRIND
147 int valgrind_id; 196 int valgrind_id;
148#endif 197#endif
198 unsigned char flags;
149} coro_cctx; 199} coro_cctx;
150 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
151enum { 205enum {
152 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
153 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
154 CF_NEW = 0x0004, /* ahs never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
155}; 212};
156 213
157/* this is a structure representing a perl-level coroutine */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
158struct coro { 215typedef struct
159 /* the c coroutine allocated to this perl coroutine, if any */ 216{
160 coro_cctx *cctx; 217 SV *defsv;
161 218 AV *defav;
162 /* data associated with this coroutine (initial args) */ 219 SV *errsv;
163 AV *args; 220 SV *irsgv;
164 int refcnt; 221 HV *hinthv;
165 int save; /* CORO_SAVE flags */
166 int flags; /* CF_ flags */
167
168 /* optionally saved, might be zero */
169 AV *defav; /* @_ */
170 SV *defsv; /* $_ */
171 SV *errsv; /* $@ */
172 SV *irssv; /* $/ */
173 SV *irssv_sv; /* real $/ cache */
174
175#define VAR(name,type) type name; 222#define VAR(name,type) type name;
176# include "state.h" 223# include "state.h"
177#undef VAR 224#undef VAR
225} perl_slots;
226
227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
228
229/* this is a structure representing a perl-level coroutine */
230struct coro {
231 /* the C coroutine allocated to this perl coroutine, if any */
232 coro_cctx *cctx;
233
234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
238 struct CoroSLF slf_frame; /* saved slf frame */
239 AV *mainstack;
240 perl_slots *slot; /* basically the saved sp */
241
242 CV *startcv; /* the CV to execute */
243 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
178 251
179 /* coro process data */ 252 /* coro process data */
180 int prio; 253 int prio;
254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
256
257 /* async_pool */
258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
271
272 /* linked list */
273 struct coro *next, *prev;
181}; 274};
182 275
183typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
184typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
185 278
279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
283
284/** Coro ********************************************************************/
285
286#define CORO_PRIO_MAX 3
287#define CORO_PRIO_HIGH 1
288#define CORO_PRIO_NORMAL 0
289#define CORO_PRIO_LOW -1
290#define CORO_PRIO_IDLE -3
291#define CORO_PRIO_MIN -4
292
293/* for Coro.pm */
294static SV *coro_current;
295static SV *coro_readyhook;
296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
298static struct coro *coro_first;
299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
372
373/** lowlevel stuff **********************************************************/
374
375static SV *
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
186static AV * 385static AV *
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV *
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504static AV *
187coro_clone_padlist (CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
188{ 506{
189 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
190 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
191 509
192 newpadlist = newAV (); 510 newpadlist = newAV ();
193 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
194#if PERL_VERSION_ATLEAST (5,9,0) 512#if PERL_VERSION_ATLEAST (5,10,0)
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
196#else 514#else
197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
198#endif 516#endif
199 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
200 --AvFILLp (padlist); 518 --AvFILLp (padlist);
201 519
202 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
203 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
204 522
205 return newpadlist; 523 return newpadlist;
206} 524}
207 525
208static void 526static void
209free_padlist (AV *padlist) 527free_padlist (pTHX_ AV *padlist)
210{ 528{
211 /* may be during global destruction */ 529 /* may be during global destruction */
212 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
213 { 531 {
214 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
215 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
216 { 535 {
217 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
218 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
219 { 538 I32 j = AvFILLp (av);
220 SV *sv; 539
221 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
222 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
223
224 SvREFCNT_dec (*svp);
225 }
226 } 545 }
227 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
228 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
229 } 551 }
230} 552}
231 553
232static int 554static int
233coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
234{ 556{
235 AV *padlist; 557 AV *padlist;
236 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
237 559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
563
238 /* casting is fun. */ 564 /* casting is fun. */
239 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240 free_padlist (padlist); 566 free_padlist (aTHX_ padlist);
241 567
242 SvREFCNT_dec (av); 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
243 569
244 return 0; 570 return 0;
245} 571}
246 572
247#define PERL_MAGIC_coro PERL_MAGIC_ext 573static MGVTBL coro_cv_vtbl = {
248 574 0, 0, 0, 0,
249static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 575 coro_cv_free
250 576};
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
257 577
258/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
259static void 579static void
260get_padlist (CV *cv) 580get_padlist (pTHX_ CV *cv)
261{ 581{
262 MAGIC *mg = CORO_MAGIC (cv); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
263 AV *av; 583 AV *av;
264 584
265 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267 else 587 else
268 { 588 {
269#if PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
270 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
271 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
272 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
273 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
274 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
275#else 596#else
276 CvPADLIST (cv) = coro_clone_padlist (cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
277#endif 598#endif
278 } 599 }
279} 600}
280 601
281static void 602static void
282put_padlist (CV *cv) 603put_padlist (pTHX_ CV *cv)
283{ 604{
284 MAGIC *mg = CORO_MAGIC (cv); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
285 AV *av; 606 AV *av;
286 607
287 if (!mg) 608 if (expect_false (!mg))
288 { 609 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 }
294 610
295 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
296 612
297 if (AvFILLp (av) >= AvMAX (av)) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
298 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
299 615
300 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301} 617}
302 618
303#define SB do { 619/** load & save, init *******************************************************/
304#define SE } while (0)
305 620
306#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 621/* swap sv heads, at least logically */
307
308static void 622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
674
675static void
309load_perl (Coro__State c) 676load_perl (pTHX_ Coro__State c)
310{ 677{
678 perl_slots *slot = c->slot;
679 c->slot = 0;
680
681 PL_mainstack = c->mainstack;
682
683 GvSV (PL_defgv) = slot->defsv;
684 GvAV (PL_defgv) = slot->defav;
685 GvSV (PL_errgv) = slot->errsv;
686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
688
311#define VAR(name,type) PL_ ## name = c->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
312# include "state.h" 690 # include "state.h"
313#undef VAR 691 #undef VAR
314
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 }
329 692
330 { 693 {
331 dSP; 694 dSP;
695
332 CV *cv; 696 CV *cv;
333 697
334 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
336 { 700 {
337 put_padlist (cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
338 CvDEPTH (cv) = PTR2IV (POPs); 702 CvDEPTH (cv) = PTR2IV (POPs);
339 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
340 } 704 }
341 705
342 PUTBACK; 706 PUTBACK;
343 } 707 }
344}
345 708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
729}
730
346static void 731static void
347save_perl (Coro__State c) 732save_perl (pTHX_ Coro__State c)
348{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
349 { 755 {
350 dSP; 756 dSP;
351 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 761 /*
356 * the worst thing you can imagine happens first - we have to save 762 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 763 * (and reinitialize) all cv's in the whole callchain :(
358 */ 764 */
359 765
360 EXTEND (SP, 3 + 1);
361 PUSHs (Nullsv); 766 XPUSHs (Nullsv);
362 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
363 for (;;) 768 for (;;)
364 { 769 {
365 while (cxix >= 0) 770 while (expect_true (cxix >= 0))
366 { 771 {
367 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
368 773
369 if (CxTYPE (cx) == CXt_SUB) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
370 { 775 {
371 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
372 777
373 if (CvDEPTH (cv)) 778 if (expect_true (CvDEPTH (cv)))
374 { 779 {
375 EXTEND (SP, 3); 780 EXTEND (SP, 3);
376 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
377 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
378 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
379 784
380 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
381 get_padlist (cv); 786 get_padlist (aTHX_ cv);
382 } 787 }
383 } 788 }
384 } 789 }
385 790
386 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
387 break; 792 break;
388 793
389 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
390 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
391 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
392 } 797 }
393 798
394 PUTBACK; 799 PUTBACK;
395 } 800 }
396 801
397 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 802 /* allocate some space on the context stack for our purposes */
398 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 803 /* we manually unroll here, as usually 2 slots is enough */
399 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 804 if (SLOT_COUNT >= 1) CXINC;
400 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 805 if (SLOT_COUNT >= 2) CXINC;
806 if (SLOT_COUNT >= 3) CXINC;
807 {
808 unsigned int i;
809 for (i = 3; i < SLOT_COUNT; ++i)
810 CXINC;
811 }
812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 813
814 c->mainstack = PL_mainstack;
815
816 {
817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
818
819 slot->defav = GvAV (PL_defgv);
820 slot->defsv = DEFSV;
821 slot->errsv = ERRSV;
822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
824
402#define VAR(name,type)c->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
403# include "state.h" 826 # include "state.h"
404#undef VAR 827 #undef VAR
828 }
405} 829}
406 830
407/* 831/*
408 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
409 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
410 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
411 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
412 */ 836 */
413#if PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
414# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
415#else 839#else
416static void 840static void
417coro_init_stacks () 841coro_init_stacks (pTHX)
418{ 842{
419 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 843 PL_curstackinfo = new_stackinfo(32, 8);
420 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
421 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
422 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423 847
424 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
425 PL_stack_sp = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
426 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427 851
428 New(50,PL_tmps_stack,128,SV*); 852 New(50,PL_tmps_stack,32,SV*);
429 PL_tmps_floor = -1; 853 PL_tmps_floor = -1;
430 PL_tmps_ix = -1; 854 PL_tmps_ix = -1;
431 PL_tmps_max = 128; 855 PL_tmps_max = 32;
432 856
433 New(54,PL_markstack,32,I32); 857 New(54,PL_markstack,16,I32);
434 PL_markstack_ptr = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
435 PL_markstack_max = PL_markstack + 32; 859 PL_markstack_max = PL_markstack + 16;
436 860
437#ifdef SET_MARK_OFFSET 861#ifdef SET_MARK_OFFSET
438 SET_MARK_OFFSET; 862 SET_MARK_OFFSET;
439#endif 863#endif
440 864
441 New(54,PL_scopestack,32,I32); 865 New(54,PL_scopestack,8,I32);
442 PL_scopestack_ix = 0; 866 PL_scopestack_ix = 0;
443 PL_scopestack_max = 32; 867 PL_scopestack_max = 8;
444 868
445 New(54,PL_savestack,64,ANY); 869 New(54,PL_savestack,24,ANY);
446 PL_savestack_ix = 0; 870 PL_savestack_ix = 0;
447 PL_savestack_max = 64; 871 PL_savestack_max = 24;
448 872
449#if !PERL_VERSION_ATLEAST (5,9,0) 873#if !PERL_VERSION_ATLEAST (5,10,0)
450 New(54,PL_retstack,16,OP*); 874 New(54,PL_retstack,4,OP*);
451 PL_retstack_ix = 0; 875 PL_retstack_ix = 0;
452 PL_retstack_max = 16; 876 PL_retstack_max = 4;
453#endif 877#endif
454} 878}
455#endif 879#endif
456 880
457/* 881/*
458 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
459 */ 883 */
460static void 884static void
461coro_destroy_stacks () 885coro_destruct_stacks (pTHX)
462{ 886{
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) 887 while (PL_curstackinfo->si_next)
477 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
478 889
479 while (PL_curstackinfo) 890 while (PL_curstackinfo)
480 { 891 {
… …
490 901
491 Safefree (PL_tmps_stack); 902 Safefree (PL_tmps_stack);
492 Safefree (PL_markstack); 903 Safefree (PL_markstack);
493 Safefree (PL_scopestack); 904 Safefree (PL_scopestack);
494 Safefree (PL_savestack); 905 Safefree (PL_savestack);
495#if !PERL_VERSION_ATLEAST (5,9,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
496 Safefree (PL_retstack); 907 Safefree (PL_retstack);
497#endif 908#endif
498} 909}
499 910
911#define CORO_RSS \
912 rss += sizeof (SYM (curstackinfo)); \
913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
919
920static size_t
921coro_rss (pTHX_ struct coro *coro)
922{
923 size_t rss = sizeof (*coro);
924
925 if (coro->mainstack)
926 {
927 if (coro->flags & CF_RUNNING)
928 {
929 #define SYM(sym) PL_ ## sym
930 CORO_RSS;
931 #undef SYM
932 }
933 else
934 {
935 #define SYM(sym) coro->slot->sym
936 CORO_RSS;
937 #undef SYM
938 }
939 }
940
941 return rss;
942}
943
944/** coroutine stack handling ************************************************/
945
946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
948static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
949
950/* apparently < 5.8.8 */
951#ifndef MgPV_nolen_const
952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
954 (const char*)(mg)->mg_ptr)
955#endif
956
957/*
958 * This overrides the default magic get method of %SIG elements.
959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
960 * and instead of trying to save and restore the hash elements, we just provide
961 * readback here.
962 */
500static void 963static int
501setup_coro (struct coro *coro) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
965{
966 const char *s = MgPV_nolen_const (mg);
967
968 if (*s == '_')
969 {
970 SV **svp = 0;
971
972 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
973 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
974
975 if (svp)
976 {
977 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
978 return 0;
979 }
980 }
981
982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
983}
984
985static int
986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
987{
988 const char *s = MgPV_nolen_const (mg);
989
990 if (*s == '_')
991 {
992 SV **svp = 0;
993
994 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
996
997 if (svp)
998 {
999 SV *old = *svp;
1000 *svp = 0;
1001 SvREFCNT_dec (old);
1002 return 0;
1003 }
1004 }
1005
1006 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1007}
1008
1009static int
1010coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1011{
1012 const char *s = MgPV_nolen_const (mg);
1013
1014 if (*s == '_')
1015 {
1016 SV **svp = 0;
1017
1018 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1020
1021 if (svp)
1022 {
1023 SV *old = *svp;
1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1025 SvREFCNT_dec (old);
1026 return 0;
1027 }
1028 }
1029
1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1031}
1032
1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
1040static int
1041slf_check_nop (pTHX_ struct CoroSLF *frame)
1042{
1043 return 0;
1044}
1045
1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
1055init_perl (pTHX_ struct coro *coro)
502{ 1056{
503 /* 1057 /*
504 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
505 */ 1059 */
506
507 coro_init_stacks (); 1060 coro_init_stacks (aTHX);
508 1061
1062 PL_runops = RUNOPS_DEFAULT;
509 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
510 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
511 PL_curpm = 0; 1069 PL_curpm = 0;
1070 PL_curpad = 0;
512 PL_localizing = 0; 1071 PL_localizing = 0;
513 PL_dirty = 0;
514 PL_restartop = 0; 1072 PL_restartop = 0;
1073#if PERL_VERSION_ATLEAST (5,10,0)
1074 PL_parser = 0;
1075#endif
1076 PL_hints = 0;
1077
1078 /* recreate the die/warn hooks */
1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1081
1082 GvSV (PL_defgv) = newSV (0);
1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
1084 GvSV (PL_errgv) = newSV (0);
1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
1087 PL_rs = newSVsv (GvSV (irsgv));
1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
515 1089
516 { 1090 {
517 dSP; 1091 dSP;
518 LOGOP myop; 1092 UNOP myop;
519 1093
520 SvREFCNT_dec (GvAV (PL_defgv));
521 GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523 Zero (&myop, 1, LOGOP); 1094 Zero (&myop, 1, UNOP);
524 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
525 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
526 1098
527 PUSHMARK (SP); 1099 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1100 PUSHs ((SV *)coro->startcv);
529 PUTBACK; 1101 PUTBACK;
530 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
531 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532 SPAGAIN;
533 } 1104 }
534 1105
535 ENTER; /* necessary e.g. for dounwind */ 1106 /* this newly created coroutine might be run on an existing cctx which most
536} 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1108 */
1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
537 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
538static void 1132static void
1133coro_unwind_stacks (pTHX)
1134{
1135 if (!IN_DESTRUCT)
1136 {
1137 /* restore all saved variables and stuff */
1138 LEAVE_SCOPE (0);
1139 assert (PL_tmps_floor == -1);
1140
1141 /* free all temporaries */
1142 FREETMPS;
1143 assert (PL_tmps_ix == -1);
1144
1145 /* unwind all extra stacks */
1146 POPSTACK_TO (PL_mainstack);
1147
1148 /* unwind main stack */
1149 dounwind (-1);
1150 }
1151}
1152
1153static void
1154destroy_perl (pTHX_ struct coro *coro)
1155{
1156 SV *svf [9];
1157
1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 /*SvRV_set (coro_current, (SV *)coro->hv);*/
1165 load_perl (aTHX_ coro);
1166
1167 coro_unwind_stacks (aTHX);
1168 coro_destruct_stacks (aTHX);
1169
1170 /* restore swapped sv's */
1171 SWAP_SVS (coro);
1172
1173 // now save some sv's to be free'd later
1174 svf [0] = GvSV (PL_defgv);
1175 svf [1] = (SV *)GvAV (PL_defgv);
1176 svf [2] = GvSV (PL_errgv);
1177 svf [3] = (SV *)PL_defoutgv;
1178 svf [4] = PL_rs;
1179 svf [5] = GvSV (irsgv);
1180 svf [6] = (SV *)GvHV (PL_hintgv);
1181 svf [7] = PL_diehook;
1182 svf [8] = PL_warnhook;
1183 assert (9 == sizeof (svf) / sizeof (*svf));
1184
1185 /*SvRV_set (coro_current, (SV *)current->hv);*/
1186 load_perl (aTHX_ current);
1187 }
1188
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1193 SvREFCNT_dec (svf [i]);
1194
1195 SvREFCNT_dec (coro->saved_deffh);
1196 SvREFCNT_dec (coro->rouse_cb);
1197 SvREFCNT_dec (coro->invoke_cb);
1198 SvREFCNT_dec (coro->invoke_av);
1199 }
1200}
1201
1202INLINE void
539free_coro_mortal () 1203free_coro_mortal (pTHX)
540{ 1204{
541 if (coro_mortal) 1205 if (expect_true (coro_mortal))
542 { 1206 {
543 SvREFCNT_dec (coro_mortal); 1207 SvREFCNT_dec (coro_mortal);
544 coro_mortal = 0; 1208 coro_mortal = 0;
545 } 1209 }
546} 1210}
547 1211
548/* inject a fake call to Coro::State::_cctx_init into the execution */ 1212static int
1213runops_trace (pTHX)
1214{
1215 COP *oldcop = 0;
1216 int oldcxix = -2;
1217
1218 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1219 {
1220 PERL_ASYNC_CHECK ();
1221
1222 if (cctx_current->flags & CC_TRACE_ALL)
1223 {
1224 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1225 {
1226 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1227 SV **bot, **top;
1228 AV *av = newAV (); /* return values */
1229 SV **cb;
1230 dSP;
1231
1232 GV *gv = CvGV (cx->blk_sub.cv);
1233 SV *fullname = sv_2mortal (newSV (0));
1234 if (isGV (gv))
1235 gv_efullname3 (fullname, gv, 0);
1236
1237 bot = PL_stack_base + cx->blk_oldsp + 1;
1238 top = cx->blk_gimme == G_ARRAY ? SP + 1
1239 : cx->blk_gimme == G_SCALAR ? bot + 1
1240 : bot;
1241
1242 av_extend (av, top - bot);
1243 while (bot < top)
1244 av_push (av, SvREFCNT_inc_NN (*bot++));
1245
1246 PL_runops = RUNOPS_DEFAULT;
1247 ENTER;
1248 SAVETMPS;
1249 EXTEND (SP, 3);
1250 PUSHMARK (SP);
1251 PUSHs (&PL_sv_no);
1252 PUSHs (fullname);
1253 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1254 PUTBACK;
1255 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1256 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1257 SPAGAIN;
1258 FREETMPS;
1259 LEAVE;
1260 PL_runops = runops_trace;
1261 }
1262
1263 if (oldcop != PL_curcop)
1264 {
1265 oldcop = PL_curcop;
1266
1267 if (PL_curcop != &PL_compiling)
1268 {
1269 SV **cb;
1270
1271 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1272 {
1273 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1274
1275 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1276 {
1277 dSP;
1278 GV *gv = CvGV (cx->blk_sub.cv);
1279 SV *fullname = sv_2mortal (newSV (0));
1280
1281 if (isGV (gv))
1282 gv_efullname3 (fullname, gv, 0);
1283
1284 PL_runops = RUNOPS_DEFAULT;
1285 ENTER;
1286 SAVETMPS;
1287 EXTEND (SP, 3);
1288 PUSHMARK (SP);
1289 PUSHs (&PL_sv_yes);
1290 PUSHs (fullname);
1291 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1292 PUTBACK;
1293 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1294 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1295 SPAGAIN;
1296 FREETMPS;
1297 LEAVE;
1298 PL_runops = runops_trace;
1299 }
1300
1301 oldcxix = cxstack_ix;
1302 }
1303
1304 if (cctx_current->flags & CC_TRACE_LINE)
1305 {
1306 dSP;
1307
1308 PL_runops = RUNOPS_DEFAULT;
1309 ENTER;
1310 SAVETMPS;
1311 EXTEND (SP, 3);
1312 PL_runops = RUNOPS_DEFAULT;
1313 PUSHMARK (SP);
1314 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1315 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1316 PUTBACK;
1317 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1318 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1319 SPAGAIN;
1320 FREETMPS;
1321 LEAVE;
1322 PL_runops = runops_trace;
1323 }
1324 }
1325 }
1326 }
1327 }
1328
1329 TAINT_NOT;
1330 return 0;
1331}
1332
1333static struct CoroSLF cctx_ssl_frame;
1334
1335static void
1336slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1337{
1338 ta->prev = 0;
1339}
1340
1341static int
1342slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1343{
1344 *frame = cctx_ssl_frame;
1345
1346 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1347}
1348
1349/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
549static void NOINLINE 1350static void NOINLINE
550prepare_cctx (coro_cctx *cctx) 1351cctx_prepare (pTHX)
551{ 1352{
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
570coro_run (void *arg)
571{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */
573 UNLOCK;
574
575 /*
576 * this is a _very_ stripped down perl interpreter ;)
577 */
578 PL_top_env = &PL_start_env; 1353 PL_top_env = &PL_start_env;
579 1354
1355 if (cctx_current->flags & CC_TRACE)
1356 PL_runops = runops_trace;
1357
1358 /* we already must be executing an SLF op, there is no other valid way
1359 * that can lead to creation of a new cctx */
1360 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1361 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1362
1363 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1364 cctx_ssl_frame = slf_frame;
1365
1366 slf_frame.prepare = slf_prepare_set_stacklevel;
1367 slf_frame.check = slf_check_set_stacklevel;
1368}
1369
1370/* the tail of transfer: execute stuff we can only do after a transfer */
1371INLINE void
1372transfer_tail (pTHX)
1373{
1374 free_coro_mortal (aTHX);
1375}
1376
1377/*
1378 * this is a _very_ stripped down perl interpreter ;)
1379 */
1380static void
1381cctx_run (void *arg)
1382{
1383#ifdef USE_ITHREADS
1384# if CORO_PTHREAD
1385 PERL_SET_CONTEXT (coro_thx);
1386# endif
1387#endif
1388 {
1389 dTHX;
1390
1391 /* normally we would need to skip the entersub here */
1392 /* not doing so will re-execute it, which is exactly what we want */
1393 /* PL_nop = PL_nop->op_next */
1394
580 /* inject call to cctx_init */ 1395 /* inject a fake subroutine call to cctx_init */
581 prepare_cctx ((coro_cctx *)arg); 1396 cctx_prepare (aTHX);
582 1397
1398 /* cctx_run is the alternative tail of transfer() */
1399 transfer_tail (aTHX);
1400
583 /* somebody will hit me for both perl_run and PL_restartop */ 1401 /* somebody or something will hit me for both perl_run and PL_restartop */
584 PL_restartop = PL_op; 1402 PL_restartop = PL_op;
585 perl_run (PL_curinterp); 1403 perl_run (PL_curinterp);
1404 /*
1405 * Unfortunately, there is no way to get at the return values of the
1406 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1407 * runtime errors here, as this is just a random interpreter, not a thread.
1408 */
586 1409
587 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1410 /*
588 abort (); 1411 * If perl-run returns we assume exit() was being called or the coro
1412 * fell off the end, which seems to be the only valid (non-bug)
1413 * reason for perl_run to return. We try to exit by jumping to the
1414 * bootstrap-time "top" top_env, as we cannot restore the "main"
1415 * coroutine as Coro has no such concept.
1416 * This actually isn't valid with the pthread backend, but OSes requiring
1417 * that backend are too broken to do it in a standards-compliant way.
1418 */
1419 PL_top_env = main_top_env;
1420 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1421 }
589} 1422}
590 1423
591static coro_cctx * 1424static coro_cctx *
592cctx_new () 1425cctx_new ()
593{ 1426{
594 coro_cctx *cctx; 1427 coro_cctx *cctx;
595 1428
596 ++cctx_count; 1429 ++cctx_count;
597
598 Newz (0, cctx, 1, coro_cctx); 1430 New (0, cctx, 1, coro_cctx);
1431
1432 cctx->gen = cctx_gen;
1433 cctx->flags = 0;
1434 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1435
1436 return cctx;
1437}
1438
1439/* create a new cctx only suitable as source */
1440static coro_cctx *
1441cctx_new_empty ()
1442{
1443 coro_cctx *cctx = cctx_new ();
1444
1445 cctx->sptr = 0;
1446 coro_create (&cctx->cctx, 0, 0, 0, 0);
1447
1448 return cctx;
1449}
1450
1451/* create a new cctx suitable as destination/running a perl interpreter */
1452static coro_cctx *
1453cctx_new_run ()
1454{
1455 coro_cctx *cctx = cctx_new ();
1456 void *stack_start;
1457 size_t stack_size;
599 1458
600#if HAVE_MMAP 1459#if HAVE_MMAP
601
602 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1460 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603 /* mmap supposedly does allocate-on-write for us */ 1461 /* 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); 1462 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 1463
606 if (cctx->sptr == (void *)-1) 1464 if (cctx->sptr != (void *)-1)
607 {
608 perror ("FATAL: unable to mmap stack for coroutine");
609 _exit (EXIT_FAILURE);
610 } 1465 {
611 1466 #if CORO_STACKGUARD
612# if STACKGUARD
613 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1467 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614# endif 1468 #endif
615 1469 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
616#else 1470 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
617 1471 cctx->flags |= CC_MAPPED;
618 cctx->ssize = STACKSIZE * (long)sizeof (long);
619 New (0, cctx->sptr, STACKSIZE, long);
620
621 if (!cctx->sptr)
622 { 1472 }
623 perror ("FATAL: unable to malloc stack for coroutine"); 1473 else
624 _exit (EXIT_FAILURE);
625 }
626
627#endif 1474#endif
1475 {
1476 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1477 New (0, cctx->sptr, cctx_stacksize, long);
628 1478
1479 if (!cctx->sptr)
1480 {
1481 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1482 _exit (EXIT_FAILURE);
1483 }
1484
1485 stack_start = cctx->sptr;
1486 stack_size = cctx->ssize;
1487 }
1488
629#if USE_VALGRIND 1489 #if CORO_USE_VALGRIND
630 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1490 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 1491 #endif
635 1492
636 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1493 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
637 1494
638 return cctx; 1495 return cctx;
639} 1496}
640 1497
641static void 1498static void
642cctx_destroy (coro_cctx *cctx) 1499cctx_destroy (coro_cctx *cctx)
643{ 1500{
644 if (!cctx) 1501 if (!cctx)
645 return; 1502 return;
646 1503
1504 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1505
647 --cctx_count; 1506 --cctx_count;
1507 coro_destroy (&cctx->cctx);
648 1508
649#if USE_VALGRIND 1509 /* coro_transfer creates new, empty cctx's */
1510 if (cctx->sptr)
1511 {
1512 #if CORO_USE_VALGRIND
650 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1513 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1514 #endif
1515
1516#if HAVE_MMAP
1517 if (cctx->flags & CC_MAPPED)
1518 munmap (cctx->sptr, cctx->ssize);
1519 else
651#endif 1520#endif
652
653#if HAVE_MMAP
654 munmap (cctx->sptr, cctx->ssize);
655#else
656 Safefree (cctx->sptr); 1521 Safefree (cctx->sptr);
657#endif 1522 }
658 1523
659 Safefree (cctx); 1524 Safefree (cctx);
660} 1525}
661 1526
1527/* wether this cctx should be destructed */
1528#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1529
662static coro_cctx * 1530static coro_cctx *
663cctx_get () 1531cctx_get (pTHX)
664{ 1532{
665 coro_cctx *cctx; 1533 while (expect_true (cctx_first))
666
667 if (cctx_first)
668 { 1534 {
669 cctx = cctx_first; 1535 coro_cctx *cctx = cctx_first;
670 cctx_first = cctx->next; 1536 cctx_first = cctx->next;
671 --cctx_idle; 1537 --cctx_idle;
672 } 1538
673 else 1539 if (expect_true (!CCTX_EXPIRED (cctx)))
674 { 1540 return cctx;
675 cctx = cctx_new (); 1541
676 PL_op = PL_op->op_next; 1542 cctx_destroy (cctx);
677 } 1543 }
678 1544
679 return cctx; 1545 return cctx_new_run ();
680} 1546}
681 1547
682static void 1548static void
683cctx_put (coro_cctx *cctx) 1549cctx_put (coro_cctx *cctx)
684{ 1550{
1551 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1552
685 /* free another cctx if overlimit */ 1553 /* free another cctx if overlimit */
686 if (cctx_idle >= MAX_IDLE_CCTX) 1554 if (expect_false (cctx_idle >= cctx_max_idle))
687 { 1555 {
688 coro_cctx *first = cctx_first; 1556 coro_cctx *first = cctx_first;
689 cctx_first = first->next; 1557 cctx_first = first->next;
690 --cctx_idle; 1558 --cctx_idle;
691 1559
692 assert (!first->inuse);
693 cctx_destroy (first); 1560 cctx_destroy (first);
694 } 1561 }
695 1562
696 ++cctx_idle; 1563 ++cctx_idle;
697 cctx->next = cctx_first; 1564 cctx->next = cctx_first;
698 cctx_first = cctx; 1565 cctx_first = cctx;
699} 1566}
700 1567
701/* never call directly, always through the coro_state_transfer global variable */ 1568/** coroutine switching *****************************************************/
702static void NOINLINE 1569
1570static void
703transfer (struct coro *prev, struct coro *next) 1571transfer_check (pTHX_ struct coro *prev, struct coro *next)
1572{
1573 /* TODO: throwing up here is considered harmful */
1574
1575 if (expect_true (prev != next))
1576 {
1577 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1579
1580 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1582
1583#if !PERL_VERSION_ATLEAST (5,10,0)
1584 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1586#endif
1587 }
1588}
1589
1590/* always use the TRANSFER macro */
1591static void NOINLINE /* noinline so we have a fixed stackframe */
1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
704{ 1593{
705 dSTACKLEVEL; 1594 dSTACKLEVEL;
706 1595
707 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
708 if (!next) 1597 if (expect_false (!prev))
709 { 1598 {
710 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1599 cctx_current->idle_sp = STACKLEVEL;
711 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712 }
713 else if (prev != next)
714 { 1601 }
1602 else if (expect_true (prev != next))
1603 {
715 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
716 1605
717 if (prev->flags & CF_NEW) 1606 if (expect_false (prev->flags & CF_NEW))
718 { 1607 {
719 /* create a new empty context */ 1608 /* create a new empty/source context */
720 Newz (0, prev->cctx, 1, coro_cctx);
721 prev->cctx->inuse = 1;
722 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
723 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
724 } 1611 }
725 1612
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; 1613 prev->flags &= ~CF_RUNNING;
734 next->flags |= CF_RUNNING; 1614 next->flags |= CF_RUNNING;
735 1615
736 LOCK; 1616 /* first get rid of the old state */
1617 save_perl (aTHX_ prev);
737 1618
738 if (next->flags & CF_NEW) 1619 if (expect_false (next->flags & CF_NEW))
739 { 1620 {
740 /* need to start coroutine */ 1621 /* need to start coroutine */
741 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
742 /* first get rid of the old state */
743 save_perl (prev);
744 /* setup coroutine call */ 1623 /* setup coroutine call */
745 setup_coro (next); 1624 init_perl (aTHX_ next);
746 /* need a new stack */
747 assert (!next->cctx);
748 } 1625 }
749 else 1626 else
1627 load_perl (aTHX_ next);
1628
1629 /* possibly untie and reuse the cctx */
1630 if (expect_true (
1631 cctx_current->idle_sp == STACKLEVEL
1632 && !(cctx_current->flags & CC_TRACE)
1633 && !force_cctx
1634 ))
750 { 1635 {
751 /* coroutine already started */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
752 save_perl (prev); 1637 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); 1638
1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1641 if (expect_false (CCTX_EXPIRED (cctx_current)))
1642 if (expect_true (!next->cctx))
1643 next->cctx = cctx_get (aTHX);
1644
1645 cctx_put (cctx_current);
754 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
755 1649
756 prev__cctx = prev->cctx; 1650 ++next->usecount;
757 1651
758 /* possibly "free" the cctx */ 1652 cctx_prev = cctx_current;
759 if (prev__cctx->idle_sp == STACKLEVEL) 1653 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1654
1655 next->cctx = 0;
1656
1657 if (expect_false (cctx_prev != cctx_current))
760 { 1658 {
761 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1659 cctx_prev->top_env = PL_top_env;
762 assert (PL_top_env == prev__cctx->top_env); 1660 PL_top_env = cctx_current->top_env;
763 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
764 prev->cctx = 0;
765
766 cctx_put (prev__cctx);
767 prev__cctx->inuse = 0;
768 } 1662 }
769 1663
770 if (!next->cctx) 1664 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 } 1665 }
788} 1666}
789 1667
790struct transfer_args 1668#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) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
796 1670
1671/** high level stuff ********************************************************/
1672
797static void 1673static void
798coro_state_destroy (struct coro *coro) 1674coro_state_destroy (pTHX_ struct coro *coro)
799{ 1675{
800 if (coro->refcnt--) 1676 if (coro->flags & CF_DESTROYED)
801 return; 1677 return;
802 1678
803 if (coro->mainstack && coro->mainstack != main_mainstack) 1679 /* this callback is reserved for slf functions needing to do cleanup */
804 { 1680 if (coro->on_destroy && !PL_dirty)
805 struct coro temp; 1681 coro->on_destroy (aTHX_ coro);
806 Zero (&temp, 1, struct coro);
807 temp.save = CORO_SAVE_ALL;
808 1682
1683 /*
1684 * The on_destroy above most likely is from an SLF call.
1685 * Since by definition the SLF call will not finish when we destroy
1686 * the coro, we will have to force-finish it here, otherwise
1687 * cleanup functions cannot call SLF functions.
1688 */
1689 coro->slf_frame.prepare = 0;
1690
1691 coro->flags |= CF_DESTROYED;
1692
809 if (coro->flags & CF_RUNNING) 1693 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 } 1694 {
1695 /* reduce nready, as destroying a ready coro effectively unreadies it */
1696 /* alternative: look through all ready queues and remove the coro */
1697 --coro_nready;
1698 }
1699 else
1700 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1701
1702 if (coro->mainstack
1703 && coro->mainstack != main_mainstack
1704 && coro->slot
1705 && !PL_dirty)
1706 destroy_perl (aTHX_ coro);
1707
1708 if (coro->next) coro->next->prev = coro->prev;
1709 if (coro->prev) coro->prev->next = coro->next;
1710 if (coro == coro_first) coro_first = coro->next;
821 1711
822 cctx_destroy (coro->cctx); 1712 cctx_destroy (coro->cctx);
1713 SvREFCNT_dec (coro->startcv);
823 SvREFCNT_dec (coro->args); 1714 SvREFCNT_dec (coro->args);
824 Safefree (coro); 1715 SvREFCNT_dec (coro->swap_sv);
1716 SvREFCNT_dec (CORO_THROW);
825} 1717}
826 1718
827static int 1719static int
828coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1720coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829{ 1721{
830 struct coro *coro = (struct coro *)mg->mg_ptr; 1722 struct coro *coro = (struct coro *)mg->mg_ptr;
831 mg->mg_ptr = 0; 1723 mg->mg_ptr = 0;
832 1724
1725 coro->hv = 0;
1726
1727 if (--coro->refcnt < 0)
1728 {
833 coro_state_destroy (coro); 1729 coro_state_destroy (aTHX_ coro);
1730 Safefree (coro);
1731 }
834 1732
835 return 0; 1733 return 0;
836} 1734}
837 1735
838static int 1736static int
… …
845 return 0; 1743 return 0;
846} 1744}
847 1745
848static MGVTBL coro_state_vtbl = { 1746static MGVTBL coro_state_vtbl = {
849 0, 0, 0, 0, 1747 0, 0, 0, 0,
850 coro_state_clear, 1748 coro_state_free,
851 0, 1749 0,
852#ifdef MGf_DUP 1750#ifdef MGf_DUP
853 coro_state_dup, 1751 coro_state_dup,
854#else 1752#else
855# define MGf_DUP 0 1753# define MGf_DUP 0
856#endif 1754#endif
857}; 1755};
858 1756
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 1757static void
882prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1758prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
883{ 1759{
884 ta->prev = SvSTATE (prev_sv); 1760 ta->prev = SvSTATE (prev_sv);
885 ta->next = SvSTATE (next_sv); 1761 ta->next = SvSTATE (next_sv);
1762 TRANSFER_CHECK (*ta);
886} 1763}
887 1764
888static void 1765static void
889api_transfer (SV *prev_sv, SV *next_sv) 1766api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
890{ 1767{
891 struct transfer_args ta; 1768 struct coro_transfer_args ta;
892 1769
893 prepare_transfer (&ta, prev_sv, next_sv); 1770 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894 TRANSFER (ta); 1771 TRANSFER (ta, 1);
1772}
1773
1774/** Coro ********************************************************************/
1775
1776INLINE void
1777coro_enq (pTHX_ struct coro *coro)
1778{
1779 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1780
1781 SvREFCNT_inc_NN (coro->hv);
1782
1783 coro->next_ready = 0;
1784 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1785 ready [1] = coro;
1786}
1787
1788INLINE struct coro *
1789coro_deq (pTHX)
1790{
1791 int prio;
1792
1793 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1794 {
1795 struct coro **ready = coro_ready [prio];
1796
1797 if (ready [0])
1798 {
1799 struct coro *coro = ready [0];
1800 ready [0] = coro->next_ready;
1801 return coro;
1802 }
1803 }
1804
1805 return 0;
1806}
1807
1808static void
1809invoke_sv_ready_hook_helper (void)
1810{
1811 dTHX;
1812 dSP;
1813
1814 ENTER;
1815 SAVETMPS;
1816
1817 PUSHMARK (SP);
1818 PUTBACK;
1819 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1820
1821 FREETMPS;
1822 LEAVE;
895} 1823}
896 1824
897static int 1825static int
898api_save (SV *coro_sv, int new_save) 1826api_ready (pTHX_ SV *coro_sv)
899{ 1827{
900 struct coro *coro = SvSTATE (coro_sv); 1828 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 1829
959 if (coro->flags & CF_READY) 1830 if (coro->flags & CF_READY)
960 return 0; 1831 return 0;
961 1832
962 coro->flags |= CF_READY; 1833 coro->flags |= CF_READY;
963 1834
964 LOCK; 1835 coro_enq (aTHX_ coro);
965 coro_enq (SvREFCNT_inc (coro_sv)); 1836
966 UNLOCK; 1837 if (!coro_nready++)
1838 if (coroapi.readyhook)
1839 coroapi.readyhook ();
967 1840
968 return 1; 1841 return 1;
969} 1842}
970 1843
971static int 1844static int
972api_is_ready (SV *coro_sv) 1845api_is_ready (pTHX_ SV *coro_sv)
973{ 1846{
974 return !!SvSTATE (coro_sv)->flags & CF_READY; 1847 return !!(SvSTATE (coro_sv)->flags & CF_READY);
975} 1848}
976 1849
1850/* expects to own a reference to next->hv */
1851INLINE void
1852prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1853{
1854 SV *prev_sv = SvRV (coro_current);
1855
1856 ta->prev = SvSTATE_hv (prev_sv);
1857 ta->next = next;
1858
1859 TRANSFER_CHECK (*ta);
1860
1861 SvRV_set (coro_current, (SV *)next->hv);
1862
1863 free_coro_mortal (aTHX);
1864 coro_mortal = prev_sv;
1865}
1866
977static void 1867static void
978prepare_schedule (struct transfer_args *ta) 1868prepare_schedule (pTHX_ struct coro_transfer_args *ta)
979{ 1869{
980 SV *prev, *next;
981
982 for (;;) 1870 for (;;)
983 { 1871 {
984 LOCK; 1872 struct coro *next = coro_deq (aTHX);
985 next = coro_deq (PRIO_MIN);
986 UNLOCK;
987 1873
988 if (next) 1874 if (expect_true (next))
1875 {
1876 /* cannot transfer to destroyed coros, skip and look for next */
1877 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1878 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1879 else
1880 {
1881 next->flags &= ~CF_READY;
1882 --coro_nready;
1883
1884 prepare_schedule_to (aTHX_ ta, next);
989 break; 1885 break;
1886 }
1887 }
1888 else
1889 {
1890 /* nothing to schedule: call the idle handler */
1891 if (SvROK (sv_idle)
1892 && SvOBJECT (SvRV (sv_idle)))
1893 {
1894 if (SvRV (sv_idle) == SvRV (coro_current))
1895 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1896
1897 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1898 api_ready (aTHX_ SvRV (sv_idle));
1899 --coro_nready;
1900 }
1901 else
1902 {
1903 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1904 dSP;
1905
1906 ENTER;
1907 SAVETMPS;
1908
1909 PUSHMARK (SP);
1910 PUTBACK;
1911 call_sv (sv_idle, G_VOID | G_DISCARD);
1912
1913 FREETMPS;
1914 LEAVE;
1915 }
1916 }
1917 }
1918}
1919
1920INLINE void
1921prepare_cede (pTHX_ struct coro_transfer_args *ta)
1922{
1923 api_ready (aTHX_ coro_current);
1924 prepare_schedule (aTHX_ ta);
1925}
1926
1927INLINE void
1928prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1929{
1930 SV *prev = SvRV (coro_current);
1931
1932 if (coro_nready)
1933 {
1934 prepare_schedule (aTHX_ ta);
1935 api_ready (aTHX_ prev);
1936 }
1937 else
1938 prepare_nop (aTHX_ ta);
1939}
1940
1941static void
1942api_schedule (pTHX)
1943{
1944 struct coro_transfer_args ta;
1945
1946 prepare_schedule (aTHX_ &ta);
1947 TRANSFER (ta, 1);
1948}
1949
1950static void
1951api_schedule_to (pTHX_ SV *coro_sv)
1952{
1953 struct coro_transfer_args ta;
1954 struct coro *next = SvSTATE (coro_sv);
1955
1956 SvREFCNT_inc_NN (coro_sv);
1957 prepare_schedule_to (aTHX_ &ta, next);
1958}
1959
1960static int
1961api_cede (pTHX)
1962{
1963 struct coro_transfer_args ta;
1964
1965 prepare_cede (aTHX_ &ta);
1966
1967 if (expect_true (ta.prev != ta.next))
1968 {
1969 TRANSFER (ta, 1);
1970 return 1;
1971 }
1972 else
1973 return 0;
1974}
1975
1976static int
1977api_cede_notself (pTHX)
1978{
1979 if (coro_nready)
1980 {
1981 struct coro_transfer_args ta;
1982
1983 prepare_cede_notself (aTHX_ &ta);
1984 TRANSFER (ta, 1);
1985 return 1;
1986 }
1987 else
1988 return 0;
1989}
1990
1991static void
1992api_trace (pTHX_ SV *coro_sv, int flags)
1993{
1994 struct coro *coro = SvSTATE (coro_sv);
1995
1996 if (coro->flags & CF_RUNNING)
1997 croak ("cannot enable tracing on a running coroutine, caught");
1998
1999 if (flags & CC_TRACE)
2000 {
2001 if (!coro->cctx)
2002 coro->cctx = cctx_new_run ();
2003 else if (!(coro->cctx->flags & CC_TRACE))
2004 croak ("cannot enable tracing on coroutine with custom stack, caught");
2005
2006 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2007 }
2008 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2009 {
2010 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2011
2012 if (coro->flags & CF_RUNNING)
2013 PL_runops = RUNOPS_DEFAULT;
2014 else
2015 coro->slot->runops = RUNOPS_DEFAULT;
2016 }
2017}
2018
2019static void
2020coro_call_on_destroy (pTHX_ struct coro *coro)
2021{
2022 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2023
2024 if (on_destroyp)
2025 {
2026 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2027 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2028 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2029
2030 while (AvFILLp (on_destroy) >= 0)
2031 {
2032 dSP; /* don't disturb outer sp */
2033 SV *cb = av_pop (on_destroy);
2034
2035 PUSHMARK (SP);
2036
2037 if (statusp)
2038 {
2039 int i;
2040 EXTEND (SP, AvFILLp (status) + 1);
2041
2042 for (i = 0; i <= AvFILLp (status); ++i)
2043 PUSHs (AvARRAY (status)[i]);
2044 }
2045
2046 PUTBACK;
2047 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2048 }
2049 }
2050}
2051
2052static void
2053coro_set_status (HV *coro_hv, SV **arg, int items)
2054{
2055 AV *av = newAV ();
2056
2057 /* items are actually not so common, so optimise for this case */
2058 if (items)
2059 {
2060 int i;
2061
2062 av_extend (av, items - 1);
2063
2064 for (i = 0; i < items; ++i)
2065 av_push (av, SvREFCNT_inc_NN (arg [i]));
2066 }
2067
2068 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2069}
2070
2071static void
2072slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2073{
2074 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2075 api_ready (aTHX_ sv_manager);
2076
2077 frame->prepare = prepare_schedule;
2078 frame->check = slf_check_repeat;
2079
2080 /* as a minor optimisation, we could unwind all stacks here */
2081 /* but that puts extra pressure on pp_slf, and is not worth much */
2082 /*coro_unwind_stacks (aTHX);*/
2083}
2084
2085static void
2086slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2087{
2088 HV *coro_hv = (HV *)SvRV (coro_current);
2089
2090 coro_set_status (coro_hv, arg, items);
2091 slf_init_terminate_cancel_common (frame, coro_hv);
2092}
2093
2094static void
2095slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 HV *coro_hv;
2098 struct coro *coro;
2099
2100 if (items <= 0)
2101 croak ("Coro::cancel called without coro object,");
2102
2103 coro = SvSTATE (arg [0]);
2104 coro_hv = coro->hv;
2105
2106 coro_set_status (coro_hv, arg + 1, items - 1);
2107
2108 if (expect_false (coro->flags & CF_NOCANCEL))
2109 {
2110 /* coro currently busy cancelling something, so just notify it */
2111 coro->slf_frame.data = (void *)coro;
2112
2113 frame->prepare = prepare_nop;
2114 frame->check = slf_check_nop;
2115 }
2116 else if (coro_hv == (HV *)SvRV (coro_current))
2117 {
2118 /* cancelling the current coro is allowed, and equals terminate */
2119 slf_init_terminate_cancel_common (frame, coro_hv);
2120 }
2121 else
2122 {
2123 struct coro *self = SvSTATE_current;
2124
2125 /* otherwise we cancel directly, purely for speed reasons
2126 * unfortunately, this requires some magic trickery, as
2127 * somebody else could cancel us, so we have to fight the cancellation.
2128 * this is ugly, and hopefully fully worth the extra speed.
2129 * besides, I can't get the slow-but-safe version working...
2130 */
2131 slf_frame.data = 0;
2132 self->flags |= CF_NOCANCEL;
2133
2134 coro_state_destroy (aTHX_ coro);
2135 coro_call_on_destroy (aTHX_ coro);
2136
2137 self->flags &= ~CF_NOCANCEL;
2138
2139 if (slf_frame.data)
2140 {
2141 /* while we were busy we have been cancelled, so terminate */
2142 slf_init_terminate_cancel_common (frame, self->hv);
2143 }
2144 else
2145 {
2146 frame->prepare = prepare_nop;
2147 frame->check = slf_check_nop;
2148 }
2149 }
2150}
2151
2152/*****************************************************************************/
2153/* async pool handler */
2154
2155static int
2156slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2157{
2158 HV *hv = (HV *)SvRV (coro_current);
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->invoke_cb)
2162 return 1; /* loop till we have invoke */
2163 else
2164 {
2165 hv_store (hv, "desc", sizeof ("desc") - 1,
2166 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2167
2168 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
990 2169
991 { 2170 {
992 dSP; 2171 dSP;
993 2172 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
994 ENTER;
995 SAVETMPS;
996
997 PUSHMARK (SP);
998 PUTBACK; 2173 PUTBACK;
999 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001 FREETMPS;
1002 LEAVE;
1003 } 2174 }
2175
2176 SvREFCNT_dec (GvAV (PL_defgv));
2177 GvAV (PL_defgv) = coro->invoke_av;
2178 coro->invoke_av = 0;
2179
2180 return 0;
2181 }
2182}
2183
2184static void
2185slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *hv = (HV *)SvRV (coro_current);
2188 struct coro *coro = SvSTATE_hv ((SV *)hv);
2189
2190 if (expect_true (coro->saved_deffh))
1004 } 2191 {
2192 /* subsequent iteration */
2193 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2194 coro->saved_deffh = 0;
1005 2195
2196 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2197 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2198 {
2199 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2200 coro->invoke_av = newAV ();
2201
2202 frame->prepare = prepare_nop;
2203 }
2204 else
2205 {
2206 av_clear (GvAV (PL_defgv));
2207 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2208
2209 coro->prio = 0;
2210
2211 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2212 api_trace (aTHX_ coro_current, 0);
2213
2214 frame->prepare = prepare_schedule;
2215 av_push (av_async_pool, SvREFCNT_inc (hv));
2216 }
2217 }
2218 else
2219 {
2220 /* first iteration, simply fall through */
2221 frame->prepare = prepare_nop;
2222 }
2223
2224 frame->check = slf_check_pool_handler;
2225 frame->data = (void *)coro;
2226}
2227
2228/*****************************************************************************/
2229/* rouse callback */
2230
2231#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2232
2233static void
2234coro_rouse_callback (pTHX_ CV *cv)
2235{
2236 dXSARGS;
2237 SV *data = (SV *)S_GENSUB_ARG;
2238
2239 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2240 {
2241 /* first call, set args */
2242 SV *coro = SvRV (data);
2243 AV *av = newAV ();
2244
2245 SvRV_set (data, (SV *)av);
2246
2247 /* better take a full copy of the arguments */
2248 while (items--)
2249 av_store (av, items, newSVsv (ST (items)));
2250
2251 api_ready (aTHX_ coro);
2252 SvREFCNT_dec (coro);
2253 }
2254
2255 XSRETURN_EMPTY;
2256}
2257
2258static int
2259slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2260{
2261 SV *data = (SV *)frame->data;
2262
2263 if (CORO_THROW)
2264 return 0;
2265
2266 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2267 return 1;
2268
2269 /* now push all results on the stack */
2270 {
2271 dSP;
2272 AV *av = (AV *)SvRV (data);
2273 int i;
2274
2275 EXTEND (SP, AvFILLp (av) + 1);
2276 for (i = 0; i <= AvFILLp (av); ++i)
2277 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2278
2279 /* we have stolen the elements, so set length to zero and free */
2280 AvFILLp (av) = -1;
2281 av_undef (av);
2282
2283 PUTBACK;
2284 }
2285
2286 return 0;
2287}
2288
2289static void
2290slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 SV *cb;
2293
2294 if (items)
2295 cb = arg [0];
2296 else
2297 {
2298 struct coro *coro = SvSTATE_current;
2299
2300 if (!coro->rouse_cb)
2301 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2302
2303 cb = sv_2mortal (coro->rouse_cb);
2304 coro->rouse_cb = 0;
2305 }
2306
2307 if (!SvROK (cb)
2308 || SvTYPE (SvRV (cb)) != SVt_PVCV
2309 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2310 croak ("Coro::rouse_wait called with illegal callback argument,");
2311
2312 {
2313 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2314 SV *data = (SV *)S_GENSUB_ARG;
2315
2316 frame->data = (void *)data;
2317 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2318 frame->check = slf_check_rouse_wait;
2319 }
2320}
2321
2322static SV *
2323coro_new_rouse_cb (pTHX)
2324{
1006 prev = SvRV (coro_current); 2325 HV *hv = (HV *)SvRV (coro_current);
1007 SvRV_set (coro_current, next); 2326 struct coro *coro = SvSTATE_hv (hv);
2327 SV *data = newRV_inc ((SV *)hv);
2328 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
1008 2329
1009 /* free this only after the transfer */ 2330 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1010 LOCK; 2331 SvREFCNT_dec (data); /* magicext increases the refcount */
1011 free_coro_mortal ();
1012 UNLOCK;
1013 coro_mortal = prev;
1014 2332
1015 assert (!SvROK(prev));//D 2333 SvREFCNT_dec (coro->rouse_cb);
1016 assert (!SvROK(next));//D 2334 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1017 2335
1018 ta->prev = SvSTATE (prev); 2336 return cb;
1019 ta->next = SvSTATE (next);
1020
1021 assert (ta->next->flags & CF_READY);
1022 ta->next->flags &= ~CF_READY;
1023} 2337}
1024 2338
2339/*****************************************************************************/
2340/* schedule-like-function opcode (SLF) */
2341
2342static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2343static const CV *slf_cv;
2344static SV **slf_argv;
2345static int slf_argc, slf_arga; /* count, allocated */
2346static I32 slf_ax; /* top of stack, for restore */
2347
2348/* this restores the stack in the case we patched the entersub, to */
2349/* recreate the stack frame as perl will on following calls */
2350/* since entersub cleared the stack */
2351static OP *
2352pp_restore (pTHX)
2353{
2354 int i;
2355 SV **SP = PL_stack_base + slf_ax;
2356
2357 PUSHMARK (SP);
2358
2359 EXTEND (SP, slf_argc + 1);
2360
2361 for (i = 0; i < slf_argc; ++i)
2362 PUSHs (sv_2mortal (slf_argv [i]));
2363
2364 PUSHs ((SV *)CvGV (slf_cv));
2365
2366 RETURNOP (slf_restore.op_first);
2367}
2368
1025static void 2369static void
2370slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2371{
2372 SV **arg = (SV **)slf_frame.data;
2373
2374 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2375}
2376
2377static void
2378slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2379{
2380 if (items != 2)
2381 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2382
2383 frame->prepare = slf_prepare_transfer;
2384 frame->check = slf_check_nop;
2385 frame->data = (void *)arg; /* let's hope it will stay valid */
2386}
2387
2388static void
2389slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2390{
2391 frame->prepare = prepare_schedule;
2392 frame->check = slf_check_nop;
2393}
2394
2395static void
1026prepare_cede (struct transfer_args *ta) 2396slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1027{ 2397{
2398 struct coro *next = (struct coro *)slf_frame.data;
2399
2400 SvREFCNT_inc_NN (next->hv);
2401 prepare_schedule_to (aTHX_ ta, next);
2402}
2403
2404static void
2405slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2406{
2407 if (!items)
2408 croak ("Coro::schedule_to expects a coroutine argument, caught");
2409
2410 frame->data = (void *)SvSTATE (arg [0]);
2411 frame->prepare = slf_prepare_schedule_to;
2412 frame->check = slf_check_nop;
2413}
2414
2415static void
2416slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2417{
1028 api_ready (coro_current); 2418 api_ready (aTHX_ SvRV (coro_current));
1029 2419
1030 prepare_schedule (ta); 2420 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1031} 2421}
1032 2422
1033static void 2423static void
1034api_schedule (void) 2424slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1035{ 2425{
2426 frame->prepare = prepare_cede;
2427 frame->check = slf_check_nop;
2428}
2429
2430static void
2431slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 frame->prepare = prepare_cede_notself;
2434 frame->check = slf_check_nop;
2435}
2436
2437/*
2438 * these not obviously related functions are all rolled into one
2439 * function to increase chances that they all will call transfer with the same
2440 * stack offset
2441 * SLF stands for "schedule-like-function".
2442 */
2443static OP *
2444pp_slf (pTHX)
2445{
2446 I32 checkmark; /* mark SP to see how many elements check has pushed */
2447
2448 /* set up the slf frame, unless it has already been set-up */
2449 /* the latter happens when a new coro has been started */
2450 /* or when a new cctx was attached to an existing coroutine */
2451 if (expect_true (!slf_frame.prepare))
2452 {
2453 /* first iteration */
2454 dSP;
2455 SV **arg = PL_stack_base + TOPMARK + 1;
2456 int items = SP - arg; /* args without function object */
2457 SV *gv = *sp;
2458
2459 /* do a quick consistency check on the "function" object, and if it isn't */
2460 /* for us, divert to the real entersub */
2461 if (SvTYPE (gv) != SVt_PVGV
2462 || !GvCV (gv)
2463 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2464 return PL_ppaddr[OP_ENTERSUB](aTHX);
2465
2466 if (!(PL_op->op_flags & OPf_STACKED))
2467 {
2468 /* ampersand-form of call, use @_ instead of stack */
2469 AV *av = GvAV (PL_defgv);
2470 arg = AvARRAY (av);
2471 items = AvFILLp (av) + 1;
2472 }
2473
2474 /* now call the init function, which needs to set up slf_frame */
2475 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2476 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2477
2478 /* pop args */
2479 SP = PL_stack_base + POPMARK;
2480
2481 PUTBACK;
2482 }
2483
2484 /* now that we have a slf_frame, interpret it! */
2485 /* we use a callback system not to make the code needlessly */
2486 /* complicated, but so we can run multiple perl coros from one cctx */
2487
2488 do
2489 {
1036 struct transfer_args ta; 2490 struct coro_transfer_args ta;
1037 2491
1038 prepare_schedule (&ta); 2492 slf_frame.prepare (aTHX_ &ta);
1039 TRANSFER (ta); 2493 TRANSFER (ta, 0);
1040}
1041 2494
2495 checkmark = PL_stack_sp - PL_stack_base;
2496 }
2497 while (slf_frame.check (aTHX_ &slf_frame));
2498
2499 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2500
2501 /* exception handling */
2502 if (expect_false (CORO_THROW))
2503 {
2504 SV *exception = sv_2mortal (CORO_THROW);
2505
2506 CORO_THROW = 0;
2507 sv_setsv (ERRSV, exception);
2508 croak (0);
2509 }
2510
2511 /* return value handling - mostly like entersub */
2512 /* make sure we put something on the stack in scalar context */
2513 if (GIMME_V == G_SCALAR)
2514 {
2515 dSP;
2516 SV **bot = PL_stack_base + checkmark;
2517
2518 if (sp == bot) /* too few, push undef */
2519 bot [1] = &PL_sv_undef;
2520 else if (sp != bot + 1) /* too many, take last one */
2521 bot [1] = *sp;
2522
2523 SP = bot + 1;
2524
2525 PUTBACK;
2526 }
2527
2528 return NORMAL;
2529}
2530
2531static void
2532api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2533{
2534 int i;
2535 SV **arg = PL_stack_base + ax;
2536 int items = PL_stack_sp - arg + 1;
2537
2538 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2539
2540 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2541 && PL_op->op_ppaddr != pp_slf)
2542 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2543
2544 CvFLAGS (cv) |= CVf_SLF;
2545 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2546 slf_cv = cv;
2547
2548 /* we patch the op, and then re-run the whole call */
2549 /* we have to put the same argument on the stack for this to work */
2550 /* and this will be done by pp_restore */
2551 slf_restore.op_next = (OP *)&slf_restore;
2552 slf_restore.op_type = OP_CUSTOM;
2553 slf_restore.op_ppaddr = pp_restore;
2554 slf_restore.op_first = PL_op;
2555
2556 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2557
2558 if (PL_op->op_flags & OPf_STACKED)
2559 {
2560 if (items > slf_arga)
2561 {
2562 slf_arga = items;
2563 Safefree (slf_argv);
2564 New (0, slf_argv, slf_arga, SV *);
2565 }
2566
2567 slf_argc = items;
2568
2569 for (i = 0; i < items; ++i)
2570 slf_argv [i] = SvREFCNT_inc (arg [i]);
2571 }
2572 else
2573 slf_argc = 0;
2574
2575 PL_op->op_ppaddr = pp_slf;
2576 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2577
2578 PL_op = (OP *)&slf_restore;
2579}
2580
2581/*****************************************************************************/
2582/* dynamic wind */
2583
2584static void
2585on_enterleave_call (pTHX_ SV *cb)
2586{
2587 dSP;
2588
2589 PUSHSTACK;
2590
2591 PUSHMARK (SP);
2592 PUTBACK;
2593 call_sv (cb, G_VOID | G_DISCARD);
2594 SPAGAIN;
2595
2596 POPSTACK;
2597}
2598
2599static SV *
2600coro_avp_pop_and_free (pTHX_ AV **avp)
2601{
2602 AV *av = *avp;
2603 SV *res = av_pop (av);
2604
2605 if (AvFILLp (av) < 0)
2606 {
2607 *avp = 0;
2608 SvREFCNT_dec (av);
2609 }
2610
2611 return res;
2612}
2613
2614static void
2615coro_pop_on_enter (pTHX_ void *coro)
2616{
2617 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2618 SvREFCNT_dec (cb);
2619}
2620
2621static void
2622coro_pop_on_leave (pTHX_ void *coro)
2623{
2624 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2625 on_enterleave_call (aTHX_ sv_2mortal (cb));
2626}
2627
2628/*****************************************************************************/
2629/* PerlIO::cede */
2630
2631typedef struct
2632{
2633 PerlIOBuf base;
2634 NV next, every;
2635} PerlIOCede;
2636
2637static IV
2638PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2639{
2640 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2641
2642 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2643 self->next = nvtime () + self->every;
2644
2645 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2646}
2647
2648static SV *
2649PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2650{
2651 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2652
2653 return newSVnv (self->every);
2654}
2655
2656static IV
2657PerlIOCede_flush (pTHX_ PerlIO *f)
2658{
2659 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2660 double now = nvtime ();
2661
2662 if (now >= self->next)
2663 {
2664 api_cede (aTHX);
2665 self->next = now + self->every;
2666 }
2667
2668 return PerlIOBuf_flush (aTHX_ f);
2669}
2670
2671static PerlIO_funcs PerlIO_cede =
2672{
2673 sizeof(PerlIO_funcs),
2674 "cede",
2675 sizeof(PerlIOCede),
2676 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2677 PerlIOCede_pushed,
2678 PerlIOBuf_popped,
2679 PerlIOBuf_open,
2680 PerlIOBase_binmode,
2681 PerlIOCede_getarg,
2682 PerlIOBase_fileno,
2683 PerlIOBuf_dup,
2684 PerlIOBuf_read,
2685 PerlIOBuf_unread,
2686 PerlIOBuf_write,
2687 PerlIOBuf_seek,
2688 PerlIOBuf_tell,
2689 PerlIOBuf_close,
2690 PerlIOCede_flush,
2691 PerlIOBuf_fill,
2692 PerlIOBase_eof,
2693 PerlIOBase_error,
2694 PerlIOBase_clearerr,
2695 PerlIOBase_setlinebuf,
2696 PerlIOBuf_get_base,
2697 PerlIOBuf_bufsiz,
2698 PerlIOBuf_get_ptr,
2699 PerlIOBuf_get_cnt,
2700 PerlIOBuf_set_ptrcnt,
2701};
2702
2703/*****************************************************************************/
2704/* Coro::Semaphore & Coro::Signal */
2705
2706static SV *
2707coro_waitarray_new (pTHX_ int count)
2708{
2709 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2710 AV *av = newAV ();
2711 SV **ary;
2712
2713 /* unfortunately, building manually saves memory */
2714 Newx (ary, 2, SV *);
2715 AvALLOC (av) = ary;
2716#if PERL_VERSION_ATLEAST (5,10,0)
2717 AvARRAY (av) = ary;
2718#else
2719 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2720 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2721 SvPVX ((SV *)av) = (char *)ary;
2722#endif
2723 AvMAX (av) = 1;
2724 AvFILLp (av) = 0;
2725 ary [0] = newSViv (count);
2726
2727 return newRV_noinc ((SV *)av);
2728}
2729
2730/* semaphore */
2731
2732static void
2733coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2734{
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 count += adjust;
2739 SvIVX (count_sv) = count;
2740
2741 /* now wake up as many waiters as are expected to lock */
2742 while (count > 0 && AvFILLp (av) > 0)
2743 {
2744 SV *cb;
2745
2746 /* swap first two elements so we can shift a waiter */
2747 AvARRAY (av)[0] = AvARRAY (av)[1];
2748 AvARRAY (av)[1] = count_sv;
2749 cb = av_shift (av);
2750
2751 if (SvOBJECT (cb))
2752 {
2753 api_ready (aTHX_ cb);
2754 --count;
2755 }
2756 else if (SvTYPE (cb) == SVt_PVCV)
2757 {
2758 dSP;
2759 PUSHMARK (SP);
2760 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2761 PUTBACK;
2762 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2763 }
2764
2765 SvREFCNT_dec (cb);
2766 }
2767}
2768
2769static void
2770coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2771{
2772 /* call $sem->adjust (0) to possibly wake up some other waiters */
2773 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2774}
2775
1042static void 2776static int
1043api_cede (void) 2777slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1044{ 2778{
1045 struct transfer_args ta; 2779 AV *av = (AV *)frame->data;
2780 SV *count_sv = AvARRAY (av)[0];
1046 2781
1047 prepare_cede (&ta); 2782 /* if we are about to throw, don't actually acquire the lock, just throw */
1048 TRANSFER (ta); 2783 if (CORO_THROW)
1049} 2784 return 0;
2785 else if (SvIVX (count_sv) > 0)
2786 {
2787 SvSTATE_current->on_destroy = 0;
1050 2788
2789 if (acquire)
2790 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2791 else
2792 coro_semaphore_adjust (aTHX_ av, 0);
2793
2794 return 0;
2795 }
2796 else
2797 {
2798 int i;
2799 /* if we were woken up but can't down, we look through the whole */
2800 /* waiters list and only add us if we aren't in there already */
2801 /* this avoids some degenerate memory usage cases */
2802
2803 for (i = 1; i <= AvFILLp (av); ++i)
2804 if (AvARRAY (av)[i] == SvRV (coro_current))
2805 return 1;
2806
2807 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2808 return 1;
2809 }
2810}
2811
2812static int
2813slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2814{
2815 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2816}
2817
2818static int
2819slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2820{
2821 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2822}
2823
2824static void
2825slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2826{
2827 AV *av = (AV *)SvRV (arg [0]);
2828
2829 if (SvIVX (AvARRAY (av)[0]) > 0)
2830 {
2831 frame->data = (void *)av;
2832 frame->prepare = prepare_nop;
2833 }
2834 else
2835 {
2836 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2837
2838 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2839 frame->prepare = prepare_schedule;
2840
2841 /* to avoid race conditions when a woken-up coro gets terminated */
2842 /* we arrange for a temporary on_destroy that calls adjust (0) */
2843 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2844 }
2845}
2846
2847static void
2848slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2849{
2850 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2851 frame->check = slf_check_semaphore_down;
2852}
2853
2854static void
2855slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2856{
2857 if (items >= 2)
2858 {
2859 /* callback form */
2860 AV *av = (AV *)SvRV (arg [0]);
2861 SV *cb_cv = s_get_cv_croak (arg [1]);
2862
2863 av_push (av, SvREFCNT_inc_NN (cb_cv));
2864
2865 if (SvIVX (AvARRAY (av)[0]) > 0)
2866 coro_semaphore_adjust (aTHX_ av, 0);
2867
2868 frame->prepare = prepare_nop;
2869 frame->check = slf_check_nop;
2870 }
2871 else
2872 {
2873 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2874 frame->check = slf_check_semaphore_wait;
2875 }
2876}
2877
2878/* signal */
2879
2880static void
2881coro_signal_wake (pTHX_ AV *av, int count)
2882{
2883 SvIVX (AvARRAY (av)[0]) = 0;
2884
2885 /* now signal count waiters */
2886 while (count > 0 && AvFILLp (av) > 0)
2887 {
2888 SV *cb;
2889
2890 /* swap first two elements so we can shift a waiter */
2891 cb = AvARRAY (av)[0];
2892 AvARRAY (av)[0] = AvARRAY (av)[1];
2893 AvARRAY (av)[1] = cb;
2894
2895 cb = av_shift (av);
2896
2897 if (SvTYPE (cb) == SVt_PVCV)
2898 {
2899 dSP;
2900 PUSHMARK (SP);
2901 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2902 PUTBACK;
2903 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2904 }
2905 else
2906 {
2907 api_ready (aTHX_ cb);
2908 sv_setiv (cb, 0); /* signal waiter */
2909 }
2910
2911 SvREFCNT_dec (cb);
2912
2913 --count;
2914 }
2915}
2916
2917static int
2918slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2919{
2920 /* if we are about to throw, also stop waiting */
2921 return SvROK ((SV *)frame->data) && !CORO_THROW;
2922}
2923
2924static void
2925slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2926{
2927 AV *av = (AV *)SvRV (arg [0]);
2928
2929 if (items >= 2)
2930 {
2931 SV *cb_cv = s_get_cv_croak (arg [1]);
2932 av_push (av, SvREFCNT_inc_NN (cb_cv));
2933
2934 if (SvIVX (AvARRAY (av)[0]))
2935 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2936
2937 frame->prepare = prepare_nop;
2938 frame->check = slf_check_nop;
2939 }
2940 else if (SvIVX (AvARRAY (av)[0]))
2941 {
2942 SvIVX (AvARRAY (av)[0]) = 0;
2943 frame->prepare = prepare_nop;
2944 frame->check = slf_check_nop;
2945 }
2946 else
2947 {
2948 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2949
2950 av_push (av, waiter);
2951
2952 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2953 frame->prepare = prepare_schedule;
2954 frame->check = slf_check_signal_wait;
2955 }
2956}
2957
2958/*****************************************************************************/
2959/* Coro::AIO */
2960
2961#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2962
2963/* helper storage struct */
2964struct io_state
2965{
2966 int errorno;
2967 I32 laststype; /* U16 in 5.10.0 */
2968 int laststatval;
2969 Stat_t statcache;
2970};
2971
2972static void
2973coro_aio_callback (pTHX_ CV *cv)
2974{
2975 dXSARGS;
2976 AV *state = (AV *)S_GENSUB_ARG;
2977 SV *coro = av_pop (state);
2978 SV *data_sv = newSV (sizeof (struct io_state));
2979
2980 av_extend (state, items - 1);
2981
2982 sv_upgrade (data_sv, SVt_PV);
2983 SvCUR_set (data_sv, sizeof (struct io_state));
2984 SvPOK_only (data_sv);
2985
2986 {
2987 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2988
2989 data->errorno = errno;
2990 data->laststype = PL_laststype;
2991 data->laststatval = PL_laststatval;
2992 data->statcache = PL_statcache;
2993 }
2994
2995 /* now build the result vector out of all the parameters and the data_sv */
2996 {
2997 int i;
2998
2999 for (i = 0; i < items; ++i)
3000 av_push (state, SvREFCNT_inc_NN (ST (i)));
3001 }
3002
3003 av_push (state, data_sv);
3004
3005 api_ready (aTHX_ coro);
3006 SvREFCNT_dec (coro);
3007 SvREFCNT_dec ((AV *)state);
3008}
3009
3010static int
3011slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3012{
3013 AV *state = (AV *)frame->data;
3014
3015 /* if we are about to throw, return early */
3016 /* this does not cancel the aio request, but at least */
3017 /* it quickly returns */
3018 if (CORO_THROW)
3019 return 0;
3020
3021 /* one element that is an RV? repeat! */
3022 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3023 return 1;
3024
3025 /* restore status */
3026 {
3027 SV *data_sv = av_pop (state);
3028 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3029
3030 errno = data->errorno;
3031 PL_laststype = data->laststype;
3032 PL_laststatval = data->laststatval;
3033 PL_statcache = data->statcache;
3034
3035 SvREFCNT_dec (data_sv);
3036 }
3037
3038 /* push result values */
3039 {
3040 dSP;
3041 int i;
3042
3043 EXTEND (SP, AvFILLp (state) + 1);
3044 for (i = 0; i <= AvFILLp (state); ++i)
3045 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3046
3047 PUTBACK;
3048 }
3049
3050 return 0;
3051}
3052
3053static void
3054slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3055{
3056 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3057 SV *coro_hv = SvRV (coro_current);
3058 struct coro *coro = SvSTATE_hv (coro_hv);
3059
3060 /* put our coroutine id on the state arg */
3061 av_push (state, SvREFCNT_inc_NN (coro_hv));
3062
3063 /* first see whether we have a non-zero priority and set it as AIO prio */
3064 if (coro->prio)
3065 {
3066 dSP;
3067
3068 static SV *prio_cv;
3069 static SV *prio_sv;
3070
3071 if (expect_false (!prio_cv))
3072 {
3073 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3074 prio_sv = newSViv (0);
3075 }
3076
3077 PUSHMARK (SP);
3078 sv_setiv (prio_sv, coro->prio);
3079 XPUSHs (prio_sv);
3080
3081 PUTBACK;
3082 call_sv (prio_cv, G_VOID | G_DISCARD);
3083 }
3084
3085 /* now call the original request */
3086 {
3087 dSP;
3088 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3089 int i;
3090
3091 PUSHMARK (SP);
3092
3093 /* first push all args to the stack */
3094 EXTEND (SP, items + 1);
3095
3096 for (i = 0; i < items; ++i)
3097 PUSHs (arg [i]);
3098
3099 /* now push the callback closure */
3100 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3101
3102 /* now call the AIO function - we assume our request is uncancelable */
3103 PUTBACK;
3104 call_sv ((SV *)req, G_VOID | G_DISCARD);
3105 }
3106
3107 /* now that the request is going, we loop till we have a result */
3108 frame->data = (void *)state;
3109 frame->prepare = prepare_schedule;
3110 frame->check = slf_check_aio_req;
3111}
3112
3113static void
3114coro_aio_req_xs (pTHX_ CV *cv)
3115{
3116 dXSARGS;
3117
3118 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3119
3120 XSRETURN_EMPTY;
3121}
3122
3123/*****************************************************************************/
3124
3125#if CORO_CLONE
3126# include "clone.c"
3127#endif
3128
3129/*****************************************************************************/
3130
3131static SV *
3132coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3133{
3134 SV *coro_sv;
3135 struct coro *coro;
3136 MAGIC *mg;
3137 HV *hv;
3138 SV *cb;
3139 int i;
3140
3141 if (argc > 0)
3142 {
3143 cb = s_get_cv_croak (argv [0]);
3144
3145 if (!is_coro)
3146 {
3147 if (CvISXSUB (cb))
3148 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3149
3150 if (!CvROOT (cb))
3151 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3152 }
3153 }
3154
3155 Newz (0, coro, 1, struct coro);
3156 coro->args = newAV ();
3157 coro->flags = CF_NEW;
3158
3159 if (coro_first) coro_first->prev = coro;
3160 coro->next = coro_first;
3161 coro_first = coro;
3162
3163 coro->hv = hv = newHV ();
3164 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3167
3168 if (argc > 0)
3169 {
3170 av_extend (coro->args, argc + is_coro - 1);
3171
3172 if (is_coro)
3173 {
3174 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3175 cb = (SV *)cv_coro_run;
3176 }
3177
3178 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3179
3180 for (i = 1; i < argc; i++)
3181 av_push (coro->args, newSVsv (argv [i]));
3182 }
3183
3184 return coro_sv;
3185}
3186
1051MODULE = Coro::State PACKAGE = Coro::State 3187MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052 3188
1053PROTOTYPES: DISABLE 3189PROTOTYPES: DISABLE
1054 3190
1055BOOT: 3191BOOT:
1056{ 3192{
1057#ifdef USE_ITHREADS 3193#ifdef USE_ITHREADS
1058 MUTEX_INIT (&coro_mutex); 3194# if CORO_PTHREAD
3195 coro_thx = PERL_GET_CONTEXT;
3196# endif
1059#endif 3197#endif
1060 BOOT_PAGESIZE; 3198 BOOT_PAGESIZE;
1061 3199
3200 cctx_current = cctx_new_empty ();
3201
3202 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3203 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3204
3205 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3206 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3207 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3208
3209 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3210 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3211 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3212
1062 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3213 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063 3214
3215 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3216 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3217 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)); 3218 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069 3219
1070 main_mainstack = PL_mainstack; 3220 main_mainstack = PL_mainstack;
3221 main_top_env = PL_top_env;
1071 3222
3223 while (main_top_env->je_prev)
3224 main_top_env = main_top_env->je_prev;
3225
3226 {
3227 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3228
3229 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3230 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3231
3232 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3233 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3234 }
3235
1072 coroapi.ver = CORO_API_VERSION; 3236 coroapi.ver = CORO_API_VERSION;
3237 coroapi.rev = CORO_API_REVISION;
3238
1073 coroapi.transfer = api_transfer; 3239 coroapi.transfer = api_transfer;
1074 3240
3241 coroapi.sv_state = SvSTATE_;
3242 coroapi.execute_slf = api_execute_slf;
3243 coroapi.prepare_nop = prepare_nop;
3244 coroapi.prepare_schedule = prepare_schedule;
3245 coroapi.prepare_cede = prepare_cede;
3246 coroapi.prepare_cede_notself = prepare_cede_notself;
3247
3248 time_init (aTHX);
3249
1075 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3250 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1076} 3251}
1077 3252
1078SV * 3253SV *
1079new (char *klass, ...) 3254new (SV *klass, ...)
3255 ALIAS:
3256 Coro::new = 1
1080 CODE: 3257 CODE:
1081{ 3258 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: 3259 OUTPUT:
1106 RETVAL 3260 RETVAL
1107 3261
1108void 3262void
1109_set_stacklevel (...) 3263transfer (...)
1110 ALIAS: 3264 PROTOTYPE: $$
1111 Coro::State::transfer = 1 3265 CODE:
1112 Coro::schedule = 2 3266 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 3267
1144void 3268void
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) 3269_exit (int code)
1158 int code
1159 PROTOTYPE: $ 3270 PROTOTYPE: $
1160 CODE: 3271 CODE:
1161 _exit (code); 3272 _exit (code);
1162 3273
3274SV *
3275clone (Coro::State coro)
3276 CODE:
3277{
3278#if CORO_CLONE
3279 struct coro *ncoro = coro_clone (aTHX_ coro);
3280 MAGIC *mg;
3281 /* TODO: too much duplication */
3282 ncoro->hv = newHV ();
3283 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3284 mg->mg_flags |= MGf_DUP;
3285 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3286#else
3287 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3288#endif
3289}
3290 OUTPUT:
3291 RETVAL
3292
3293int
3294cctx_stacksize (int new_stacksize = 0)
3295 PROTOTYPE: ;$
3296 CODE:
3297 RETVAL = cctx_stacksize;
3298 if (new_stacksize)
3299 {
3300 cctx_stacksize = new_stacksize;
3301 ++cctx_gen;
3302 }
3303 OUTPUT:
3304 RETVAL
3305
3306int
3307cctx_max_idle (int max_idle = 0)
3308 PROTOTYPE: ;$
3309 CODE:
3310 RETVAL = cctx_max_idle;
3311 if (max_idle > 1)
3312 cctx_max_idle = max_idle;
3313 OUTPUT:
3314 RETVAL
3315
1163int 3316int
1164cctx_count () 3317cctx_count ()
3318 PROTOTYPE:
1165 CODE: 3319 CODE:
1166 RETVAL = cctx_count; 3320 RETVAL = cctx_count;
1167 OUTPUT: 3321 OUTPUT:
1168 RETVAL 3322 RETVAL
1169 3323
1170int 3324int
1171cctx_idle () 3325cctx_idle ()
3326 PROTOTYPE:
1172 CODE: 3327 CODE:
1173 RETVAL = cctx_idle; 3328 RETVAL = cctx_idle;
1174 OUTPUT: 3329 OUTPUT:
1175 RETVAL 3330 RETVAL
1176 3331
3332void
3333list ()
3334 PROTOTYPE:
3335 PPCODE:
3336{
3337 struct coro *coro;
3338 for (coro = coro_first; coro; coro = coro->next)
3339 if (coro->hv)
3340 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3341}
3342
3343void
3344call (Coro::State coro, SV *coderef)
3345 ALIAS:
3346 eval = 1
3347 CODE:
3348{
3349 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3350 {
3351 struct coro *current = SvSTATE_current;
3352 struct CoroSLF slf_save;
3353
3354 if (current != coro)
3355 {
3356 PUTBACK;
3357 save_perl (aTHX_ current);
3358 load_perl (aTHX_ coro);
3359 /* the coro is most likely in an active SLF call.
3360 * while not strictly required (the code we execute is
3361 * not allowed to call any SLF functions), it's cleaner
3362 * to reinitialise the slf_frame and restore it later.
3363 * This might one day allow us to actually do SLF calls
3364 * from code executed here.
3365 */
3366 slf_save = slf_frame;
3367 slf_frame.prepare = 0;
3368 SPAGAIN;
3369 }
3370
3371 PUSHSTACK;
3372
3373 PUSHMARK (SP);
3374 PUTBACK;
3375
3376 if (ix)
3377 eval_sv (coderef, 0);
3378 else
3379 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3380
3381 POPSTACK;
3382 SPAGAIN;
3383
3384 if (current != coro)
3385 {
3386 PUTBACK;
3387 slf_frame = slf_save;
3388 save_perl (aTHX_ coro);
3389 load_perl (aTHX_ current);
3390 SPAGAIN;
3391 }
3392 }
3393}
3394
3395SV *
3396is_ready (Coro::State coro)
3397 PROTOTYPE: $
3398 ALIAS:
3399 is_ready = CF_READY
3400 is_running = CF_RUNNING
3401 is_new = CF_NEW
3402 is_destroyed = CF_DESTROYED
3403 is_suspended = CF_SUSPENDED
3404 CODE:
3405 RETVAL = boolSV (coro->flags & ix);
3406 OUTPUT:
3407 RETVAL
3408
3409void
3410throw (Coro::State self, SV *exception = &PL_sv_undef)
3411 PROTOTYPE: $;$
3412 CODE:
3413{
3414 struct coro *current = SvSTATE_current;
3415 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3416 SvREFCNT_dec (*exceptionp);
3417 SvGETMAGIC (exception);
3418 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3419}
3420
3421void
3422api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3423 PROTOTYPE: $;$
3424 C_ARGS: aTHX_ coro, flags
3425
3426SV *
3427has_cctx (Coro::State coro)
3428 PROTOTYPE: $
3429 CODE:
3430 /* maybe manage the running flag differently */
3431 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3432 OUTPUT:
3433 RETVAL
3434
3435int
3436is_traced (Coro::State coro)
3437 PROTOTYPE: $
3438 CODE:
3439 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3440 OUTPUT:
3441 RETVAL
3442
3443UV
3444rss (Coro::State coro)
3445 PROTOTYPE: $
3446 ALIAS:
3447 usecount = 1
3448 CODE:
3449 switch (ix)
3450 {
3451 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3452 case 1: RETVAL = coro->usecount; break;
3453 }
3454 OUTPUT:
3455 RETVAL
3456
3457void
3458force_cctx ()
3459 PROTOTYPE:
3460 CODE:
3461 cctx_current->idle_sp = 0;
3462
3463void
3464swap_defsv (Coro::State self)
3465 PROTOTYPE: $
3466 ALIAS:
3467 swap_defav = 1
3468 CODE:
3469 if (!self->slot)
3470 croak ("cannot swap state with coroutine that has no saved state,");
3471 else
3472 {
3473 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3474 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3475
3476 SV *tmp = *src; *src = *dst; *dst = tmp;
3477 }
3478
3479void
3480cancel (Coro::State self)
3481 CODE:
3482 coro_state_destroy (aTHX_ self);
3483
3484SV *
3485enable_times (int enabled = enable_times)
3486 CODE:
3487{
3488 RETVAL = boolSV (enable_times);
3489
3490 if (enabled != enable_times)
3491 {
3492 enable_times = enabled;
3493
3494 coro_times_update ();
3495 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3496 }
3497}
3498 OUTPUT:
3499 RETVAL
3500
3501void
3502times (Coro::State self)
3503 PPCODE:
3504{
3505 struct coro *current = SvSTATE (coro_current);
3506
3507 if (expect_false (current == self))
3508 {
3509 coro_times_update ();
3510 coro_times_add (SvSTATE (coro_current));
3511 }
3512
3513 EXTEND (SP, 2);
3514 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3515 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3516
3517 if (expect_false (current == self))
3518 coro_times_sub (SvSTATE (coro_current));
3519}
3520
3521void
3522swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3523 CODE:
3524{
3525 struct coro *current = SvSTATE_current;
3526
3527 if (current == coro)
3528 SWAP_SVS (current);
3529
3530 if (!coro->swap_sv)
3531 coro->swap_sv = newAV ();
3532
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3534 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3535
3536 if (current == coro)
3537 SWAP_SVS (current);
3538}
3539
3540
1177MODULE = Coro::State PACKAGE = Coro 3541MODULE = Coro::State PACKAGE = Coro
1178 3542
1179BOOT: 3543BOOT:
1180{ 3544{
1181 int i; 3545 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3546 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3547 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3548 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3549 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3550 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3551 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3552 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3553 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1182 3554
3555 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3556 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3557 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3558 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3559
1183 coro_stash = gv_stashpv ("Coro", TRUE); 3560 coro_stash = gv_stashpv ("Coro", TRUE);
1184 3561
1185 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3562 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1186 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3563 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1187 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3564 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1188 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3565 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1189 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3566 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1190 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3567 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 3568
1198 { 3569 {
1199 SV *sv = perl_get_sv("Coro::API", 1); 3570 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1200 3571
1201 coroapi.schedule = api_schedule; 3572 coroapi.schedule = api_schedule;
1202 coroapi.save = api_save; 3573 coroapi.schedule_to = api_schedule_to;
1203 coroapi.cede = api_cede; 3574 coroapi.cede = api_cede;
3575 coroapi.cede_notself = api_cede_notself;
1204 coroapi.ready = api_ready; 3576 coroapi.ready = api_ready;
1205 coroapi.is_ready = api_is_ready; 3577 coroapi.is_ready = api_is_ready;
1206 coroapi.nready = &coro_nready; 3578 coroapi.nready = coro_nready;
1207 coroapi.current = coro_current; 3579 coroapi.current = coro_current;
1208 3580
1209 GCoroAPI = &coroapi; 3581 /*GCoroAPI = &coroapi;*/
1210 sv_setiv (sv, (IV)&coroapi); 3582 sv_setiv (sv, (IV)&coroapi);
1211 SvREADONLY_on (sv); 3583 SvREADONLY_on (sv);
1212 } 3584 }
1213} 3585}
3586
3587SV *
3588async (...)
3589 PROTOTYPE: &@
3590 CODE:
3591 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3592 api_ready (aTHX_ RETVAL);
3593 OUTPUT:
3594 RETVAL
3595
3596void
3597_destroy (Coro::State coro)
3598 CODE:
3599 /* used by the manager thread */
3600 coro_state_destroy (aTHX_ coro);
3601 coro_call_on_destroy (aTHX_ coro);
3602
3603void
3604terminate (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3607
3608void
3609cancel (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3612
3613void
3614schedule (...)
3615 CODE:
3616 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3617
3618void
3619schedule_to (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3622
3623void
3624cede_to (...)
3625 CODE:
3626 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3627
3628void
3629cede (...)
3630 CODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_cede);
3632
3633void
3634cede_notself (...)
3635 CODE:
3636 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1214 3637
1215void 3638void
1216_set_current (SV *current) 3639_set_current (SV *current)
1217 PROTOTYPE: $ 3640 PROTOTYPE: $
1218 CODE: 3641 CODE:
1219 SvREFCNT_dec (SvRV (coro_current)); 3642 SvREFCNT_dec (SvRV (coro_current));
1220 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3643 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3644
3645void
3646_set_readyhook (SV *hook)
3647 PROTOTYPE: $
3648 CODE:
3649 SvREFCNT_dec (coro_readyhook);
3650 SvGETMAGIC (hook);
3651 if (SvOK (hook))
3652 {
3653 coro_readyhook = newSVsv (hook);
3654 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3655 }
3656 else
3657 {
3658 coro_readyhook = 0;
3659 CORO_READYHOOK = 0;
3660 }
1221 3661
1222int 3662int
1223prio (Coro::State coro, int newprio = 0) 3663prio (Coro::State coro, int newprio = 0)
3664 PROTOTYPE: $;$
1224 ALIAS: 3665 ALIAS:
1225 nice = 1 3666 nice = 1
1226 CODE: 3667 CODE:
1227{ 3668{
1228 RETVAL = coro->prio; 3669 RETVAL = coro->prio;
1229 3670
1230 if (items > 1) 3671 if (items > 1)
1231 { 3672 {
1232 if (ix) 3673 if (ix)
1233 newprio += coro->prio; 3674 newprio = coro->prio - newprio;
1234 3675
1235 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3676 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1236 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3677 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1237 3678
1238 coro->prio = newprio; 3679 coro->prio = newprio;
1239 } 3680 }
1240} 3681}
3682 OUTPUT:
3683 RETVAL
1241 3684
1242SV * 3685SV *
1243ready (SV *self) 3686ready (SV *self)
1244 PROTOTYPE: $ 3687 PROTOTYPE: $
1245 CODE: 3688 CODE:
1246 RETVAL = boolSV (api_ready (self)); 3689 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: 3690 OUTPUT:
1256 RETVAL 3691 RETVAL
1257 3692
1258int 3693int
1259nready (...) 3694nready (...)
… …
1261 CODE: 3696 CODE:
1262 RETVAL = coro_nready; 3697 RETVAL = coro_nready;
1263 OUTPUT: 3698 OUTPUT:
1264 RETVAL 3699 RETVAL
1265 3700
1266MODULE = Coro::State PACKAGE = Coro::AIO 3701void
3702suspend (Coro::State self)
3703 PROTOTYPE: $
3704 CODE:
3705 self->flags |= CF_SUSPENDED;
3706
3707void
3708resume (Coro::State self)
3709 PROTOTYPE: $
3710 CODE:
3711 self->flags &= ~CF_SUSPENDED;
3712
3713void
3714_pool_handler (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3717
3718void
3719async_pool (SV *cv, ...)
3720 PROTOTYPE: &@
3721 PPCODE:
3722{
3723 HV *hv = (HV *)av_pop (av_async_pool);
3724 AV *av = newAV ();
3725 SV *cb = ST (0);
3726 int i;
3727
3728 av_extend (av, items - 2);
3729 for (i = 1; i < items; ++i)
3730 av_push (av, SvREFCNT_inc_NN (ST (i)));
3731
3732 if ((SV *)hv == &PL_sv_undef)
3733 {
3734 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3735 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3736 SvREFCNT_dec (sv);
3737 }
3738
3739 {
3740 struct coro *coro = SvSTATE_hv (hv);
3741
3742 assert (!coro->invoke_cb);
3743 assert (!coro->invoke_av);
3744 coro->invoke_cb = SvREFCNT_inc (cb);
3745 coro->invoke_av = av;
3746 }
3747
3748 api_ready (aTHX_ (SV *)hv);
3749
3750 if (GIMME_V != G_VOID)
3751 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3752 else
3753 SvREFCNT_dec (hv);
3754}
1267 3755
1268SV * 3756SV *
1269_get_state () 3757rouse_cb ()
3758 PROTOTYPE:
1270 CODE: 3759 CODE:
1271{ 3760 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: 3761 OUTPUT:
1285 RETVAL 3762 RETVAL
1286 3763
1287void 3764void
1288_set_state (char *data_) 3765rouse_wait (...)
3766 PROTOTYPE: ;$
3767 PPCODE:
3768 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3769
3770void
3771on_enter (SV *block)
3772 ALIAS:
3773 on_leave = 1
1289 PROTOTYPE: $ 3774 PROTOTYPE: &
1290 CODE: 3775 CODE:
1291{ 3776{
1292 struct io_state *data = (void *)data_; 3777 struct coro *coro = SvSTATE_current;
3778 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1293 3779
1294 errno = data->errorno; 3780 block = s_get_cv_croak (block);
1295 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache;
1298}
1299 3781
3782 if (!*avp)
3783 *avp = newAV ();
3784
3785 av_push (*avp, SvREFCNT_inc (block));
3786
3787 if (!ix)
3788 on_enterleave_call (aTHX_ block);
3789
3790 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3791 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3792 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3793}
3794
3795
3796MODULE = Coro::State PACKAGE = PerlIO::cede
3797
3798BOOT:
3799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3800
3801
3802MODULE = Coro::State PACKAGE = Coro::Semaphore
3803
3804SV *
3805new (SV *klass, SV *count = 0)
3806 CODE:
3807{
3808 int semcnt = 1;
3809
3810 if (count)
3811 {
3812 SvGETMAGIC (count);
3813
3814 if (SvOK (count))
3815 semcnt = SvIV (count);
3816 }
3817
3818 RETVAL = sv_bless (
3819 coro_waitarray_new (aTHX_ semcnt),
3820 GvSTASH (CvGV (cv))
3821 );
3822}
3823 OUTPUT:
3824 RETVAL
3825
3826# helper for Coro::Channel and others
3827SV *
3828_alloc (int count)
3829 CODE:
3830 RETVAL = coro_waitarray_new (aTHX_ count);
3831 OUTPUT:
3832 RETVAL
3833
3834SV *
3835count (SV *self)
3836 CODE:
3837 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3838 OUTPUT:
3839 RETVAL
3840
3841void
3842up (SV *self, int adjust = 1)
3843 ALIAS:
3844 adjust = 1
3845 CODE:
3846 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3847
3848void
3849down (...)
3850 CODE:
3851 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3852
3853void
3854wait (...)
3855 CODE:
3856 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3857
3858void
3859try (SV *self)
3860 PPCODE:
3861{
3862 AV *av = (AV *)SvRV (self);
3863 SV *count_sv = AvARRAY (av)[0];
3864 IV count = SvIVX (count_sv);
3865
3866 if (count > 0)
3867 {
3868 --count;
3869 SvIVX (count_sv) = count;
3870 XSRETURN_YES;
3871 }
3872 else
3873 XSRETURN_NO;
3874}
3875
3876void
3877waiters (SV *self)
3878 PPCODE:
3879{
3880 AV *av = (AV *)SvRV (self);
3881 int wcount = AvFILLp (av) + 1 - 1;
3882
3883 if (GIMME_V == G_SCALAR)
3884 XPUSHs (sv_2mortal (newSViv (wcount)));
3885 else
3886 {
3887 int i;
3888 EXTEND (SP, wcount);
3889 for (i = 1; i <= wcount; ++i)
3890 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3891 }
3892}
3893
3894MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3895
3896void
3897_may_delete (SV *sem, int count, int extra_refs)
3898 PPCODE:
3899{
3900 AV *av = (AV *)SvRV (sem);
3901
3902 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3903 && AvFILLp (av) == 0 /* no waiters, just count */
3904 && SvIV (AvARRAY (av)[0]) == count)
3905 XSRETURN_YES;
3906
3907 XSRETURN_NO;
3908}
3909
3910MODULE = Coro::State PACKAGE = Coro::Signal
3911
3912SV *
3913new (SV *klass)
3914 CODE:
3915 RETVAL = sv_bless (
3916 coro_waitarray_new (aTHX_ 0),
3917 GvSTASH (CvGV (cv))
3918 );
3919 OUTPUT:
3920 RETVAL
3921
3922void
3923wait (...)
3924 CODE:
3925 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3926
3927void
3928broadcast (SV *self)
3929 CODE:
3930{
3931 AV *av = (AV *)SvRV (self);
3932 coro_signal_wake (aTHX_ av, AvFILLp (av));
3933}
3934
3935void
3936send (SV *self)
3937 CODE:
3938{
3939 AV *av = (AV *)SvRV (self);
3940
3941 if (AvFILLp (av))
3942 coro_signal_wake (aTHX_ av, 1);
3943 else
3944 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3945}
3946
3947IV
3948awaited (SV *self)
3949 CODE:
3950 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3951 OUTPUT:
3952 RETVAL
3953
3954
3955MODULE = Coro::State PACKAGE = Coro::AnyEvent
3956
3957BOOT:
3958 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3959
3960void
3961_schedule (...)
3962 CODE:
3963{
3964 static int incede;
3965
3966 api_cede_notself (aTHX);
3967
3968 ++incede;
3969 while (coro_nready >= incede && api_cede (aTHX))
3970 ;
3971
3972 sv_setsv (sv_activity, &PL_sv_undef);
3973 if (coro_nready >= incede)
3974 {
3975 PUSHMARK (SP);
3976 PUTBACK;
3977 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3978 }
3979
3980 --incede;
3981}
3982
3983
3984MODULE = Coro::State PACKAGE = Coro::AIO
3985
3986void
3987_register (char *target, char *proto, SV *req)
3988 CODE:
3989{
3990 SV *req_cv = s_get_cv_croak (req);
3991 /* newXSproto doesn't return the CV on 5.8 */
3992 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3993 sv_setpv ((SV *)slf_cv, proto);
3994 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3995}
3996
3997MODULE = Coro::State PACKAGE = Coro::Select
3998
3999void
4000patch_pp_sselect ()
4001 CODE:
4002 if (!coro_old_pp_sselect)
4003 {
4004 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4005 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4006 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4007 }
4008
4009void
4010unpatch_pp_sselect ()
4011 CODE:
4012 if (coro_old_pp_sselect)
4013 {
4014 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4015 coro_old_pp_sselect = 0;
4016 }
4017

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