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Comparing Coro/Coro/State.xs (file contents):
Revision 1.187 by root, Fri Oct 5 20:31:18 2007 UTC vs.
Revision 1.388 by root, Wed Feb 23 07:14:22 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"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#include <stdio.h> 18#include <stdio.h>
12#include <errno.h> 19#include <errno.h>
13#include <assert.h> 20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#ifdef 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
14 35
15#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
16# include <unistd.h> 37# include <unistd.h>
17# include <sys/mman.h> 38# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 56# define BOOT_PAGESIZE (void)0
36#endif 57#endif
37 58
38#if CORO_USE_VALGRIND 59#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 60# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 61#endif
44 62
45/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 64static int cctx_max_idle = 4;
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79 65
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
82#endif 68#endif
83 69
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 76# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 77#endif
92 78
93/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
95#define dSTACKLEVEL volatile char stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
97 88
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
99 90
100#if __GNUC__ >= 3 91#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
103#else 95#else
104# define attribute(x) 96# define attribute(x)
105# define BARRIER 97# define expect(expr,value) (expr)
98# define INLINE static
106#endif 99#endif
107 100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
108#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
109 105
110#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
111 108
112#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 110# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 111static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 112# endif
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 113#endif
120 114
121/* helper storage struct for Coro::AIO */ 115#ifdef __linux
122struct io_state 116# include <time.h> /* for timespec */
123{ 117# include <syscall.h> /* for SYS_* */
124 int errorno; 118# ifdef SYS_clock_gettime
125 I32 laststype; 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 120# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 122# endif
123#endif
129 124
125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131
132static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 136static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136 139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
137static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
138 149
139/* async_pool helper stuff */ 150/* async_pool helper stuff */
140static SV *sv_pool_rss; 151static SV *sv_pool_rss;
141static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
142static AV *av_async_pool; 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;
143 166
144static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
146 169
147enum { 170enum {
… …
152 CC_TRACE_LINE = 0x10, /* trace each statement */ 175 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154}; 177};
155 178
156/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx { 180typedef struct coro_cctx
181{
158 struct coro_cctx *next; 182 struct coro_cctx *next;
159 183
160 /* the stack */ 184 /* the stack */
161 void *sptr; 185 void *sptr;
162 size_t ssize; 186 size_t ssize;
… …
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env; 191 JMPENV *top_env;
168 coro_context cctx; 192 coro_context cctx;
169 193
194 U32 gen;
170#if CORO_USE_VALGRIND 195#if CORO_USE_VALGRIND
171 int valgrind_id; 196 int valgrind_id;
172#endif 197#endif
173 unsigned char flags; 198 unsigned char flags;
174} coro_cctx; 199} coro_cctx;
175 200
201coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
176enum { 205enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
181}; 211};
182 212
183/* this is a structure representing a perl-level coroutine */ 213/* the structure where most of the perl state is stored, overlaid on the cxstack */
184struct coro { 214typedef struct
185 /* the c coroutine allocated to this perl coroutine, if any */ 215{
186 coro_cctx *cctx; 216 SV *defsv;
187 217 AV *defav;
188 /* data associated with this coroutine (initial args) */ 218 SV *errsv;
189 AV *args; 219 SV *irsgv;
190 int refcnt; 220 HV *hinthv;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name; 221#define VAR(name,type) type name;
202# include "state.h" 222# include "state.h"
203#undef VAR 223#undef VAR
224} perl_slots;
225
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227
228/* this is a structure representing a perl-level coroutine */
229struct coro {
230 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx;
232
233 /* ready queue */
234 struct coro *next_ready;
235
236 /* state data */
237 struct CoroSLF slf_frame; /* saved slf frame */
238 AV *mainstack;
239 perl_slots *slot; /* basically the saved sp */
240
241 CV *startcv; /* the CV to execute */
242 AV *args; /* data associated with this coroutine (initial args) */
243 int refcnt; /* coroutines are refcounted, yes */
244 int flags; /* CF_ flags */
245 HV *hv; /* the perl hash associated with this coro, if any */
246 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
204 247
205 /* statistics */ 248 /* statistics */
206 int usecount; /* number of transfers to this coro */ 249 int usecount; /* number of transfers to this coro */
207 250
208 /* coro process data */ 251 /* coro process data */
209 int prio; 252 int prio;
210 //SV *throw; 253 SV *except; /* exception to be thrown */
254 SV *rouse_cb;
211 255
212 /* async_pool */ 256 /* async_pool */
213 SV *saved_deffh; 257 SV *saved_deffh;
258 SV *invoke_cb;
259 AV *invoke_av;
260
261 /* on_enter/on_leave */
262 AV *on_enter;
263 AV *on_leave;
264
265 /* swap_sv */
266 AV *swap_sv;
267
268 /* times */
269 coro_ts t_cpu, t_real;
214 270
215 /* linked list */ 271 /* linked list */
216 struct coro *next, *prev; 272 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
218}; 273};
219 274
220typedef struct coro *Coro__State; 275typedef struct coro *Coro__State;
221typedef struct coro *Coro__State_or_hashref; 276typedef struct coro *Coro__State_or_hashref;
222 277
278/* the following variables are effectively part of the perl context */
279/* and get copied between struct coro and these variables */
280/* the mainr easonw e don't support windows process emulation */
281static struct CoroSLF slf_frame; /* the current slf frame */
282
223/** Coro ********************************************************************/ 283/** Coro ********************************************************************/
224 284
225#define PRIO_MAX 3 285#define CORO_PRIO_MAX 3
226#define PRIO_HIGH 1 286#define CORO_PRIO_HIGH 1
227#define PRIO_NORMAL 0 287#define CORO_PRIO_NORMAL 0
228#define PRIO_LOW -1 288#define CORO_PRIO_LOW -1
229#define PRIO_IDLE -3 289#define CORO_PRIO_IDLE -3
230#define PRIO_MIN -4 290#define CORO_PRIO_MIN -4
231 291
232/* for Coro.pm */ 292/* for Coro.pm */
233static SV *coro_current; 293static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 294static SV *coro_readyhook;
235static int coro_nready; 295static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
296static CV *cv_coro_run, *cv_coro_terminate;
236static struct coro *coro_first; 297static struct coro *coro_first;
298#define coro_nready coroapi.nready
299
300/** Coro::Select ************************************************************/
301
302static OP *(*coro_old_pp_sselect) (pTHX);
303static SV *coro_select_select;
304
305/* horrible hack, but if it works... */
306static OP *
307coro_pp_sselect (pTHX)
308{
309 dSP;
310 PUSHMARK (SP - 4); /* fake argument list */
311 XPUSHs (coro_select_select);
312 PUTBACK;
313
314 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
315 PL_op->op_flags |= OPf_STACKED;
316 PL_op->op_private = 0;
317 return PL_ppaddr [OP_ENTERSUB](aTHX);
318}
319
320/** time stuff **************************************************************/
321
322#ifdef HAS_GETTIMEOFDAY
323
324static void
325coro_u2time (pTHX_ UV ret[2])
326{
327 struct timeval tv;
328 gettimeofday (&tv, 0);
329
330 ret [0] = tv.tv_sec;
331 ret [1] = tv.tv_usec;
332}
333
334static double
335coro_nvtime ()
336{
337 struct timeval tv;
338 gettimeofday (&tv, 0);
339
340 return tv.tv_sec + tv.tv_usec * 1e-6;
341}
342
343static void
344time_init (pTHX)
345{
346 nvtime = coro_nvtime;
347 u2time = coro_u2time;
348}
349
350#else
351
352static void
353time_init (pTHX)
354{
355 SV **svp;
356
357 require_pv ("Time/HiRes.pm");
358
359 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
360
361 if (!svp) croak ("Time::HiRes is required, but missing.");
362 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
363
364 nvtime = INT2PTR (double (*)(), SvIV (*svp));
365
366 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
367 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
368}
369
370#endif
237 371
238/** lowlevel stuff **********************************************************/ 372/** lowlevel stuff **********************************************************/
239 373
374static SV *
375coro_get_sv (pTHX_ const char *name, int create)
376{
377#if PERL_VERSION_ATLEAST (5,10,0)
378 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
379 get_sv (name, create);
380#endif
381 return get_sv (name, create);
382}
383
240static AV * 384static AV *
385coro_get_av (pTHX_ const char *name, int create)
386{
387#if PERL_VERSION_ATLEAST (5,10,0)
388 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
389 get_av (name, create);
390#endif
391 return get_av (name, create);
392}
393
394static HV *
395coro_get_hv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_hv (name, create);
400#endif
401 return get_hv (name, create);
402}
403
404INLINE void
405coro_times_update ()
406{
407#ifdef coro_clock_gettime
408 struct timespec ts;
409
410 ts.tv_sec = ts.tv_nsec = 0;
411 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
412 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
413
414 ts.tv_sec = ts.tv_nsec = 0;
415 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
416 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
417#else
418 dTHX;
419 UV tv[2];
420
421 u2time (aTHX_ tv);
422 time_real [0] = tv [0];
423 time_real [1] = tv [1] * 1000;
424#endif
425}
426
427INLINE void
428coro_times_add (struct coro *c)
429{
430 c->t_real [1] += time_real [1];
431 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
432 c->t_real [0] += time_real [0];
433
434 c->t_cpu [1] += time_cpu [1];
435 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
436 c->t_cpu [0] += time_cpu [0];
437}
438
439INLINE void
440coro_times_sub (struct coro *c)
441{
442 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
443 c->t_real [1] -= time_real [1];
444 c->t_real [0] -= time_real [0];
445
446 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
447 c->t_cpu [1] -= time_cpu [1];
448 c->t_cpu [0] -= time_cpu [0];
449}
450
451/*****************************************************************************/
452/* magic glue */
453
454#define CORO_MAGIC_type_cv 26
455#define CORO_MAGIC_type_state PERL_MAGIC_ext
456
457#define CORO_MAGIC_NN(sv, type) \
458 (expect_true (SvMAGIC (sv)->mg_type == type) \
459 ? SvMAGIC (sv) \
460 : mg_find (sv, type))
461
462#define CORO_MAGIC(sv, type) \
463 (expect_true (SvMAGIC (sv)) \
464 ? CORO_MAGIC_NN (sv, type) \
465 : 0)
466
467#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
468#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
469
470INLINE struct coro *
471SvSTATE_ (pTHX_ SV *coro)
472{
473 HV *stash;
474 MAGIC *mg;
475
476 if (SvROK (coro))
477 coro = SvRV (coro);
478
479 if (expect_false (SvTYPE (coro) != SVt_PVHV))
480 croak ("Coro::State object required");
481
482 stash = SvSTASH (coro);
483 if (expect_false (stash != coro_stash && stash != coro_state_stash))
484 {
485 /* very slow, but rare, check */
486 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
487 croak ("Coro::State object required");
488 }
489
490 mg = CORO_MAGIC_state (coro);
491 return (struct coro *)mg->mg_ptr;
492}
493
494#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
495
496/* faster than SvSTATE, but expects a coroutine hv */
497#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
498#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
499
500/*****************************************************************************/
501/* padlist management and caching */
502
503static AV *
241coro_clone_padlist (pTHX_ CV *cv) 504coro_derive_padlist (pTHX_ CV *cv)
242{ 505{
243 AV *padlist = CvPADLIST (cv); 506 AV *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad; 507 AV *newpadlist, *newpad;
245 508
246 newpadlist = newAV (); 509 newpadlist = newAV ();
247 AvREAL_off (newpadlist); 510 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0) 511#if PERL_VERSION_ATLEAST (5,10,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 512 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else 513#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 514 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif 515#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 516 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist); 517 --AvFILLp (padlist);
255 518
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 519 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
257 av_store (newpadlist, 1, (SV *)newpad); 520 av_store (newpadlist, 1, (SV *)newpad);
258 521
259 return newpadlist; 522 return newpadlist;
260} 523}
261 524
262static void 525static void
263free_padlist (pTHX_ AV *padlist) 526free_padlist (pTHX_ AV *padlist)
264{ 527{
265 /* may be during global destruction */ 528 /* may be during global destruction */
266 if (SvREFCNT (padlist)) 529 if (!IN_DESTRUCT)
267 { 530 {
268 I32 i = AvFILLp (padlist); 531 I32 i = AvFILLp (padlist);
269 while (i >= 0) 532
533 while (i > 0) /* special-case index 0 */
270 { 534 {
271 SV **svp = av_fetch (padlist, i--, FALSE); 535 /* we try to be extra-careful here */
272 if (svp) 536 AV *av = (AV *)AvARRAY (padlist)[i--];
273 { 537 I32 j = AvFILLp (av);
274 SV *sv; 538
275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 539 while (j >= 0)
540 SvREFCNT_dec (AvARRAY (av)[j--]);
541
542 AvFILLp (av) = -1;
276 SvREFCNT_dec (sv); 543 SvREFCNT_dec (av);
277
278 SvREFCNT_dec (*svp);
279 }
280 } 544 }
281 545
546 SvREFCNT_dec (AvARRAY (padlist)[0]);
547
548 AvFILLp (padlist) = -1;
282 SvREFCNT_dec ((SV*)padlist); 549 SvREFCNT_dec ((SV*)padlist);
283 } 550 }
284} 551}
285 552
286static int 553static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 554coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{ 555{
289 AV *padlist; 556 AV *padlist;
290 AV *av = (AV *)mg->mg_obj; 557 AV *av = (AV *)mg->mg_obj;
558
559 /* perl manages to free our internal AV and _then_ call us */
560 if (IN_DESTRUCT)
561 return 0;
291 562
292 /* casting is fun. */ 563 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 564 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist); 565 free_padlist (aTHX_ padlist);
295 566
296 SvREFCNT_dec (av); 567 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
297 568
298 return 0; 569 return 0;
299} 570}
300 571
301#define PERL_MAGIC_coro PERL_MAGIC_ext 572static MGVTBL coro_cv_vtbl = {
302 573 0, 0, 0, 0,
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 574 coro_cv_free
304 575};
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337 576
338/* the next two functions merely cache the padlists */ 577/* the next two functions merely cache the padlists */
339static void 578static void
340get_padlist (pTHX_ CV *cv) 579get_padlist (pTHX_ CV *cv)
341{ 580{
342 MAGIC *mg = CORO_MAGIC (cv); 581 MAGIC *mg = CORO_MAGIC_cv (cv);
343 AV *av; 582 AV *av;
344 583
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 584 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 585 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
347 else 586 else
348 { 587 {
349#if CORO_PREFER_PERL_FUNCTIONS 588#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */ 589 /* this is probably cleaner? but also slower! */
590 /* in practise, it seems to be less stable */
351 CV *cp = Perl_cv_clone (cv); 591 CV *cp = Perl_cv_clone (aTHX_ cv);
352 CvPADLIST (cv) = CvPADLIST (cp); 592 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0; 593 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp); 594 SvREFCNT_dec (cp);
355#else 595#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 596 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
357#endif 597#endif
358 } 598 }
359} 599}
360 600
361static void 601static void
362put_padlist (pTHX_ CV *cv) 602put_padlist (pTHX_ CV *cv)
363{ 603{
364 MAGIC *mg = CORO_MAGIC (cv); 604 MAGIC *mg = CORO_MAGIC_cv (cv);
365 AV *av; 605 AV *av;
366 606
367 if (!mg) 607 if (expect_false (!mg))
368 { 608 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
374 609
375 av = (AV *)mg->mg_obj; 610 av = (AV *)mg->mg_obj;
376 611
377 if (AvFILLp (av) >= AvMAX (av)) 612 if (expect_false (AvFILLp (av) >= AvMAX (av)))
378 av_extend (av, AvMAX (av) + 1); 613 av_extend (av, AvFILLp (av) + 1);
379 614
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 615 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381} 616}
382 617
383/** load & save, init *******************************************************/ 618/** load & save, init *******************************************************/
384 619
620/* swap sv heads, at least logically */
621static void
622swap_svs (pTHX_ Coro__State c)
623{
624 int i;
625
626 for (i = 0; i <= AvFILLp (c->swap_sv); )
627 {
628 SV *a = AvARRAY (c->swap_sv)[i++];
629 SV *b = AvARRAY (c->swap_sv)[i++];
630
631 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
632 SV tmp;
633
634 /* swap sv_any */
635 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
636
637 /* swap sv_flags */
638 SvFLAGS (&tmp) = SvFLAGS (a);
639 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
640 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
641
642#if PERL_VERSION_ATLEAST (5,10,0)
643 /* perl 5.10 complicates this _quite_ a bit, but it also is
644 * much faster, so no quarrels here. alternatively, we could
645 * sv_upgrade to avoid this.
646 */
647 {
648 /* swap sv_u */
649 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
650
651 /* if SvANY points to the head, we need to adjust the pointers,
652 * as the pointer for a still points to b, and maybe vice versa.
653 */
654 #define svany_in_head(type) \
655 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
656
657 if (svany_in_head (SvTYPE (a)))
658 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
659
660 if (svany_in_head (SvTYPE (b)))
661 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
662 }
663#endif
664 }
665}
666
667#define SWAP_SVS(coro) \
668 if (expect_false ((coro)->swap_sv)) \
669 swap_svs (aTHX_ (coro))
670
671static void
672on_enterleave_call (pTHX_ SV *cb);
673
385static void 674static void
386load_perl (pTHX_ Coro__State c) 675load_perl (pTHX_ Coro__State c)
387{ 676{
677 perl_slots *slot = c->slot;
678 c->slot = 0;
679
680 PL_mainstack = c->mainstack;
681
682 GvSV (PL_defgv) = slot->defsv;
683 GvAV (PL_defgv) = slot->defav;
684 GvSV (PL_errgv) = slot->errsv;
685 GvSV (irsgv) = slot->irsgv;
686 GvHV (PL_hintgv) = slot->hinthv;
687
388#define VAR(name,type) PL_ ## name = c->name; 688 #define VAR(name,type) PL_ ## name = slot->name;
389# include "state.h" 689 # include "state.h"
390#undef VAR 690 #undef VAR
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 GvSV (irsgv) = c->irssv_sv;
396 691
397 { 692 {
398 dSP; 693 dSP;
694
399 CV *cv; 695 CV *cv;
400 696
401 /* now do the ugly restore mess */ 697 /* now do the ugly restore mess */
402 while ((cv = (CV *)POPs)) 698 while (expect_true (cv = (CV *)POPs))
403 { 699 {
404 put_padlist (aTHX_ cv); /* mark this padlist as available */ 700 put_padlist (aTHX_ cv); /* mark this padlist as available */
405 CvDEPTH (cv) = PTR2IV (POPs); 701 CvDEPTH (cv) = PTR2IV (POPs);
406 CvPADLIST (cv) = (AV *)POPs; 702 CvPADLIST (cv) = (AV *)POPs;
407 } 703 }
408 704
409 PUTBACK; 705 PUTBACK;
410 } 706 }
707
708 slf_frame = c->slf_frame;
709 CORO_THROW = c->except;
710
711 if (expect_false (enable_times))
712 {
713 if (expect_false (!times_valid))
714 coro_times_update ();
715
716 coro_times_sub (c);
717 }
718
719 if (expect_false (c->on_enter))
720 {
721 int i;
722
723 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
724 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
725 }
726
727 SWAP_SVS (c);
411} 728}
412 729
413static void 730static void
414save_perl (pTHX_ Coro__State c) 731save_perl (pTHX_ Coro__State c)
415{ 732{
733 SWAP_SVS (c);
734
735 if (expect_false (c->on_leave))
736 {
737 int i;
738
739 for (i = AvFILLp (c->on_leave); i >= 0; --i)
740 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
741 }
742
743 times_valid = 0;
744
745 if (expect_false (enable_times))
746 {
747 coro_times_update (); times_valid = 1;
748 coro_times_add (c);
749 }
750
751 c->except = CORO_THROW;
752 c->slf_frame = slf_frame;
753
416 { 754 {
417 dSP; 755 dSP;
418 I32 cxix = cxstack_ix; 756 I32 cxix = cxstack_ix;
419 PERL_CONTEXT *ccstk = cxstack; 757 PERL_CONTEXT *ccstk = cxstack;
420 PERL_SI *top_si = PL_curstackinfo; 758 PERL_SI *top_si = PL_curstackinfo;
… …
426 764
427 XPUSHs (Nullsv); 765 XPUSHs (Nullsv);
428 /* this loop was inspired by pp_caller */ 766 /* this loop was inspired by pp_caller */
429 for (;;) 767 for (;;)
430 { 768 {
431 while (cxix >= 0) 769 while (expect_true (cxix >= 0))
432 { 770 {
433 PERL_CONTEXT *cx = &ccstk[cxix--]; 771 PERL_CONTEXT *cx = &ccstk[cxix--];
434 772
435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 773 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
436 { 774 {
437 CV *cv = cx->blk_sub.cv; 775 CV *cv = cx->blk_sub.cv;
438 776
439 if (CvDEPTH (cv)) 777 if (expect_true (CvDEPTH (cv)))
440 { 778 {
441 EXTEND (SP, 3); 779 EXTEND (SP, 3);
442 PUSHs ((SV *)CvPADLIST (cv)); 780 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 781 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
444 PUSHs ((SV *)cv); 782 PUSHs ((SV *)cv);
445 783
446 CvDEPTH (cv) = 0; 784 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv); 785 get_padlist (aTHX_ cv);
448 } 786 }
449 } 787 }
450 } 788 }
451 789
452 if (top_si->si_type == PERLSI_MAIN) 790 if (expect_true (top_si->si_type == PERLSI_MAIN))
453 break; 791 break;
454 792
455 top_si = top_si->si_prev; 793 top_si = top_si->si_prev;
456 ccstk = top_si->si_cxstack; 794 ccstk = top_si->si_cxstack;
457 cxix = top_si->si_cxix; 795 cxix = top_si->si_cxix;
458 } 796 }
459 797
460 PUTBACK; 798 PUTBACK;
461 } 799 }
462 800
801 /* allocate some space on the context stack for our purposes */
802 /* we manually unroll here, as usually 2 slots is enough */
803 if (SLOT_COUNT >= 1) CXINC;
804 if (SLOT_COUNT >= 2) CXINC;
805 if (SLOT_COUNT >= 3) CXINC;
806 {
807 unsigned int i;
808 for (i = 3; i < SLOT_COUNT; ++i)
809 CXINC;
810 }
811 cxstack_ix -= SLOT_COUNT; /* undo allocation */
812
813 c->mainstack = PL_mainstack;
814
815 {
816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
817
463 c->defav = GvAV (PL_defgv); 818 slot->defav = GvAV (PL_defgv);
464 c->defsv = DEFSV; 819 slot->defsv = DEFSV;
465 c->errsv = ERRSV; 820 slot->errsv = ERRSV;
466 c->irssv_sv = GvSV (irsgv); 821 slot->irsgv = GvSV (irsgv);
822 slot->hinthv = GvHV (PL_hintgv);
467 823
468#define VAR(name,type)c->name = PL_ ## name; 824 #define VAR(name,type) slot->name = PL_ ## name;
469# include "state.h" 825 # include "state.h"
470#undef VAR 826 #undef VAR
827 }
471} 828}
472 829
473/* 830/*
474 * allocate various perl stacks. This is an exact copy 831 * allocate various perl stacks. This is almost an exact copy
475 * of perl.c:init_stacks, except that it uses less memory 832 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do 833 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace. 834 * not usually need a lot of stackspace.
478 */ 835 */
479#if CORO_PREFER_PERL_FUNCTIONS 836#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks 837# define coro_init_stacks(thx) init_stacks ()
481#else 838#else
482static void 839static void
483coro_init_stacks (pTHX) 840coro_init_stacks (pTHX)
484{ 841{
485 PL_curstackinfo = new_stackinfo(64, 6); 842 PL_curstackinfo = new_stackinfo(32, 8);
486 PL_curstackinfo->si_type = PERLSI_MAIN; 843 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack; 844 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489 846
490 PL_stack_base = AvARRAY(PL_curstack); 847 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base; 848 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 849 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493 850
494 New(50,PL_tmps_stack,64,SV*); 851 New(50,PL_tmps_stack,32,SV*);
495 PL_tmps_floor = -1; 852 PL_tmps_floor = -1;
496 PL_tmps_ix = -1; 853 PL_tmps_ix = -1;
497 PL_tmps_max = 64; 854 PL_tmps_max = 32;
498 855
499 New(54,PL_markstack,16,I32); 856 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack; 857 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16; 858 PL_markstack_max = PL_markstack + 16;
502 859
503#ifdef SET_MARK_OFFSET 860#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET; 861 SET_MARK_OFFSET;
505#endif 862#endif
506 863
507 New(54,PL_scopestack,16,I32); 864 New(54,PL_scopestack,8,I32);
508 PL_scopestack_ix = 0; 865 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16; 866 PL_scopestack_max = 8;
510 867
511 New(54,PL_savestack,64,ANY); 868 New(54,PL_savestack,24,ANY);
512 PL_savestack_ix = 0; 869 PL_savestack_ix = 0;
513 PL_savestack_max = 64; 870 PL_savestack_max = 24;
514 871
515#if !PERL_VERSION_ATLEAST (5,9,0) 872#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,4,OP*); 873 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 874 PL_retstack_ix = 0;
518 PL_retstack_max = 4; 875 PL_retstack_max = 4;
519#endif 876#endif
520} 877}
… …
522 879
523/* 880/*
524 * destroy the stacks, the callchain etc... 881 * destroy the stacks, the callchain etc...
525 */ 882 */
526static void 883static void
527coro_destroy_stacks (pTHX) 884coro_destruct_stacks (pTHX)
528{ 885{
529 while (PL_curstackinfo->si_next) 886 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next; 887 PL_curstackinfo = PL_curstackinfo->si_next;
531 888
532 while (PL_curstackinfo) 889 while (PL_curstackinfo)
… …
543 900
544 Safefree (PL_tmps_stack); 901 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 902 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 903 Safefree (PL_scopestack);
547 Safefree (PL_savestack); 904 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 905#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 906 Safefree (PL_retstack);
550#endif 907#endif
551} 908}
552 909
910#define CORO_RSS \
911 rss += sizeof (SYM (curstackinfo)); \
912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
918
553static size_t 919static size_t
554coro_rss (pTHX_ struct coro *coro) 920coro_rss (pTHX_ struct coro *coro)
555{ 921{
556 size_t rss = sizeof (*coro); 922 size_t rss = sizeof (*coro);
557 923
558 if (coro->mainstack) 924 if (coro->mainstack)
559 { 925 {
560 if (coro->flags & CF_RUNNING) 926 if (coro->flags & CF_RUNNING)
561 { 927 {
562 #define VAR(name,type)coro->name = PL_ ## name; 928 #define SYM(sym) PL_ ## sym
563 # include "state.h" 929 CORO_RSS;
564 #undef VAR 930 #undef SYM
565 } 931 }
932 else
933 {
934 #define SYM(sym) coro->slot->sym
935 CORO_RSS;
936 #undef SYM
937 }
938 }
566 939
567 rss += sizeof (coro->curstackinfo); 940 return rss;
568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 941}
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575 942
576#if !PERL_VERSION_ATLEAST (5,9,0) 943/** coroutine stack handling ************************************************/
577 rss += coro->retstack_max * sizeof (OP *); 944
945static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
948
949/* apparently < 5.8.8 */
950#ifndef MgPV_nolen_const
951#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
952 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
953 (const char*)(mg)->mg_ptr)
578#endif 954#endif
955
956/*
957 * This overrides the default magic get method of %SIG elements.
958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
959 * and instead of trying to save and restore the hash elements, we just provide
960 * readback here.
961 */
962static int
963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
964{
965 const char *s = MgPV_nolen_const (mg);
966
967 if (*s == '_')
579 } 968 {
969 SV **svp = 0;
580 970
971 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
972 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
973
974 if (svp)
975 {
976 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
977 return 0;
978 }
979 }
980
981 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
982}
983
984static int
985coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
986{
987 const char *s = MgPV_nolen_const (mg);
988
989 if (*s == '_')
990 {
991 SV **svp = 0;
992
993 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
994 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
995
996 if (svp)
997 {
998 SV *old = *svp;
999 *svp = 0;
1000 SvREFCNT_dec (old);
1001 return 0;
1002 }
1003 }
1004
1005 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1006}
1007
1008static int
1009coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1010{
1011 const char *s = MgPV_nolen_const (mg);
1012
1013 if (*s == '_')
1014 {
1015 SV **svp = 0;
1016
1017 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1019
1020 if (svp)
1021 {
1022 SV *old = *svp;
1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1024 SvREFCNT_dec (old);
1025 return 0;
1026 }
1027 }
1028
1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1030}
1031
1032static void
1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
1034{
1035 /* kind of mega-hacky, but works */
1036 ta->next = ta->prev = (struct coro *)ta;
1037}
1038
1039static int
1040slf_check_nop (pTHX_ struct CoroSLF *frame)
1041{
581 return rss; 1042 return 0;
582} 1043}
583 1044
584/** coroutine stack handling ************************************************/
585
586static void 1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053static void NOINLINE /* noinline to keep it out of the transfer fast path */
587coro_setup (pTHX_ struct coro *coro) 1054init_perl (pTHX_ struct coro *coro)
588{ 1055{
589 /* 1056 /*
590 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
591 */ 1058 */
592 coro_init_stacks (aTHX); 1059 coro_init_stacks (aTHX);
593 1060
594 PL_runops = RUNOPS_DEFAULT; 1061 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 1062 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 1063 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
598 PL_curpm = 0; 1068 PL_curpm = 0;
1069 PL_curpad = 0;
599 PL_localizing = 0; 1070 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0; 1071 PL_restartop = 0;
1072#if PERL_VERSION_ATLEAST (5,10,0)
1073 PL_parser = 0;
1074#endif
1075 PL_hints = 0;
1076
1077 /* recreate the die/warn hooks */
1078 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1079 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
602 1080
603 GvSV (PL_defgv) = NEWSV (0, 0); 1081 GvSV (PL_defgv) = newSV (0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0; 1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0); 1083 GvSV (PL_errgv) = newSV (0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
607 PL_rs = newSVsv (GvSV (irsgv)); 1086 PL_rs = newSVsv (GvSV (irsgv));
608 1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
609 SvREFCNT_inc (PL_defoutgv);
610 1088
611 { 1089 {
612 dSP; 1090 dSP;
613 LOGOP myop; 1091 UNOP myop;
614 1092
615 Zero (&myop, 1, LOGOP); 1093 Zero (&myop, 1, UNOP);
616 myop.op_next = Nullop; 1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
617 myop.op_flags = OPf_WANT_VOID; 1096 myop.op_flags = OPf_WANT_VOID;
618 1097
619 PUSHMARK (SP); 1098 PUSHMARK (SP);
620 XPUSHs (av_shift (GvAV (PL_defgv))); 1099 PUSHs ((SV *)coro->startcv);
621 PUTBACK; 1100 PUTBACK;
622 PL_op = (OP *)&myop; 1101 PL_op = (OP *)&myop;
623 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
624 SPAGAIN;
625 } 1103 }
626 1104
627 ENTER; /* necessary e.g. for dounwind */ 1105 /* this newly created coroutine might be run on an existing cctx which most
628} 1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1107 */
1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
629 1110
1111 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1112 init_perl_op.op_next = PL_op;
1113 init_perl_op.op_type = OP_ENTERSUB;
1114 init_perl_op.op_ppaddr = pp_slf;
1115 /* no flags etc. required, as an init function won't be called */
1116
1117 PL_op = (OP *)&init_perl_op;
1118
1119 /* copy throw, in case it was set before init_perl */
1120 CORO_THROW = coro->except;
1121
1122 SWAP_SVS (coro);
1123
1124 if (expect_false (enable_times))
1125 {
1126 coro_times_update ();
1127 coro_times_sub (coro);
1128 }
1129}
1130
630static void 1131static void
631coro_destroy (pTHX_ struct coro *coro) 1132coro_unwind_stacks (pTHX)
632{ 1133{
633 if (!IN_DESTRUCT) 1134 if (!IN_DESTRUCT)
634 { 1135 {
635 /* restore all saved variables and stuff */ 1136 /* restore all saved variables and stuff */
636 LEAVE_SCOPE (0); 1137 LEAVE_SCOPE (0);
… …
644 POPSTACK_TO (PL_mainstack); 1145 POPSTACK_TO (PL_mainstack);
645 1146
646 /* unwind main stack */ 1147 /* unwind main stack */
647 dounwind (-1); 1148 dounwind (-1);
648 } 1149 }
1150}
649 1151
650 SvREFCNT_dec (GvSV (PL_defgv)); 1152static void
651 SvREFCNT_dec (GvAV (PL_defgv)); 1153destroy_perl (pTHX_ struct coro *coro)
652 SvREFCNT_dec (GvSV (PL_errgv)); 1154{
653 SvREFCNT_dec (PL_defoutgv); 1155 SV *svf [9];
654 SvREFCNT_dec (PL_rs);
655 SvREFCNT_dec (GvSV (irsgv));
656 1156
1157 {
1158 struct coro *current = SvSTATE_current;
1159
1160 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1161
1162 save_perl (aTHX_ current);
1163 load_perl (aTHX_ coro);
1164
1165 coro_unwind_stacks (aTHX);
1166 coro_destruct_stacks (aTHX);
1167
1168 /* restore swapped sv's */
1169 SWAP_SVS (coro);
1170
1171 // now save some sv's to be free'd later
1172 svf [0] = GvSV (PL_defgv);
1173 svf [1] = (SV *)GvAV (PL_defgv);
1174 svf [2] = GvSV (PL_errgv);
1175 svf [3] = (SV *)PL_defoutgv;
1176 svf [4] = PL_rs;
1177 svf [5] = GvSV (irsgv);
1178 svf [6] = (SV *)GvHV (PL_hintgv);
1179 svf [7] = PL_diehook;
1180 svf [8] = PL_warnhook;
1181 assert (9 == sizeof (svf) / sizeof (*svf));
1182
1183 load_perl (aTHX_ current);
1184 }
1185
1186 {
1187 unsigned int i;
1188
1189 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1190 SvREFCNT_dec (svf [i]);
1191
657 SvREFCNT_dec (coro->saved_deffh); 1192 SvREFCNT_dec (coro->saved_deffh);
658 //SvREFCNT_dec (coro->throw); 1193 SvREFCNT_dec (coro->rouse_cb);
659 1194 SvREFCNT_dec (coro->invoke_cb);
660 coro_destroy_stacks (aTHX); 1195 SvREFCNT_dec (coro->invoke_av);
1196 }
661} 1197}
662 1198
663static void 1199INLINE void
664free_coro_mortal (pTHX) 1200free_coro_mortal (pTHX)
665{ 1201{
666 if (coro_mortal) 1202 if (expect_true (coro_mortal))
667 { 1203 {
668 SvREFCNT_dec (coro_mortal); 1204 SvREFCNT_dec (coro_mortal);
669 coro_mortal = 0; 1205 coro_mortal = 0;
670 } 1206 }
671} 1207}
… …
673static int 1209static int
674runops_trace (pTHX) 1210runops_trace (pTHX)
675{ 1211{
676 COP *oldcop = 0; 1212 COP *oldcop = 0;
677 int oldcxix = -2; 1213 int oldcxix = -2;
678 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
679 coro_cctx *cctx = coro->cctx;
680 1214
681 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1215 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
682 { 1216 {
683 PERL_ASYNC_CHECK (); 1217 PERL_ASYNC_CHECK ();
684 1218
685 if (cctx->flags & CC_TRACE_ALL) 1219 if (cctx_current->flags & CC_TRACE_ALL)
686 { 1220 {
687 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1221 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
688 { 1222 {
689 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1223 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
690 SV **bot, **top; 1224 SV **bot, **top;
691 AV *av = newAV (); /* return values */ 1225 AV *av = newAV (); /* return values */
692 SV **cb; 1226 SV **cb;
… …
700 bot = PL_stack_base + cx->blk_oldsp + 1; 1234 bot = PL_stack_base + cx->blk_oldsp + 1;
701 top = cx->blk_gimme == G_ARRAY ? SP + 1 1235 top = cx->blk_gimme == G_ARRAY ? SP + 1
702 : cx->blk_gimme == G_SCALAR ? bot + 1 1236 : cx->blk_gimme == G_SCALAR ? bot + 1
703 : bot; 1237 : bot;
704 1238
1239 av_extend (av, top - bot);
705 while (bot < top) 1240 while (bot < top)
706 av_push (av, SvREFCNT_inc (*bot++)); 1241 av_push (av, SvREFCNT_inc_NN (*bot++));
707 1242
708 PL_runops = RUNOPS_DEFAULT; 1243 PL_runops = RUNOPS_DEFAULT;
709 ENTER; 1244 ENTER;
710 SAVETMPS; 1245 SAVETMPS;
711 EXTEND (SP, 3); 1246 EXTEND (SP, 3);
… …
728 1263
729 if (PL_curcop != &PL_compiling) 1264 if (PL_curcop != &PL_compiling)
730 { 1265 {
731 SV **cb; 1266 SV **cb;
732 1267
733 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1268 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
734 { 1269 {
735 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1270 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
736 1271
737 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1272 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
738 { 1273 {
739 runops_proc_t old_runops = PL_runops;
740 dSP; 1274 dSP;
741 GV *gv = CvGV (cx->blk_sub.cv); 1275 GV *gv = CvGV (cx->blk_sub.cv);
742 SV *fullname = sv_2mortal (newSV (0)); 1276 SV *fullname = sv_2mortal (newSV (0));
743 1277
744 if (isGV (gv)) 1278 if (isGV (gv))
… …
749 SAVETMPS; 1283 SAVETMPS;
750 EXTEND (SP, 3); 1284 EXTEND (SP, 3);
751 PUSHMARK (SP); 1285 PUSHMARK (SP);
752 PUSHs (&PL_sv_yes); 1286 PUSHs (&PL_sv_yes);
753 PUSHs (fullname); 1287 PUSHs (fullname);
754 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1288 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
755 PUTBACK; 1289 PUTBACK;
756 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1290 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
757 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1291 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
758 SPAGAIN; 1292 SPAGAIN;
759 FREETMPS; 1293 FREETMPS;
… …
762 } 1296 }
763 1297
764 oldcxix = cxstack_ix; 1298 oldcxix = cxstack_ix;
765 } 1299 }
766 1300
767 if (cctx->flags & CC_TRACE_LINE) 1301 if (cctx_current->flags & CC_TRACE_LINE)
768 { 1302 {
769 dSP; 1303 dSP;
770 1304
771 PL_runops = RUNOPS_DEFAULT; 1305 PL_runops = RUNOPS_DEFAULT;
772 ENTER; 1306 ENTER;
… …
791 1325
792 TAINT_NOT; 1326 TAINT_NOT;
793 return 0; 1327 return 0;
794} 1328}
795 1329
796/* inject a fake call to Coro::State::_cctx_init into the execution */ 1330static struct CoroSLF cctx_ssl_frame;
797/* _cctx_init should be careful, as it could be called at almost any time */ 1331
798/* during execution of a perl program */ 1332static void
1333slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1334{
1335 ta->prev = 0;
1336}
1337
1338static int
1339slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1340{
1341 *frame = cctx_ssl_frame;
1342
1343 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1344}
1345
1346/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
799static void NOINLINE 1347static void NOINLINE
800prepare_cctx (pTHX_ coro_cctx *cctx) 1348cctx_prepare (pTHX)
801{ 1349{
802 dSP;
803 LOGOP myop;
804
805 PL_top_env = &PL_start_env; 1350 PL_top_env = &PL_start_env;
806 1351
807 if (cctx->flags & CC_TRACE) 1352 if (cctx_current->flags & CC_TRACE)
808 PL_runops = runops_trace; 1353 PL_runops = runops_trace;
809 1354
810 Zero (&myop, 1, LOGOP); 1355 /* we already must be executing an SLF op, there is no other valid way
811 myop.op_next = PL_op; 1356 * that can lead to creation of a new cctx */
812 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1357 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1358 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
813 1359
814 PUSHMARK (SP); 1360 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
815 EXTEND (SP, 2); 1361 cctx_ssl_frame = slf_frame;
816 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1362
817 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1363 slf_frame.prepare = slf_prepare_set_stacklevel;
818 PUTBACK; 1364 slf_frame.check = slf_check_set_stacklevel;
819 PL_op = (OP *)&myop; 1365}
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1366
821 SPAGAIN; 1367/* the tail of transfer: execute stuff we can only do after a transfer */
1368INLINE void
1369transfer_tail (pTHX)
1370{
1371 free_coro_mortal (aTHX);
822} 1372}
823 1373
824/* 1374/*
825 * this is a _very_ stripped down perl interpreter ;) 1375 * this is a _very_ stripped down perl interpreter ;)
826 */ 1376 */
827static void 1377static void
828coro_run (void *arg) 1378cctx_run (void *arg)
829{ 1379{
1380#ifdef USE_ITHREADS
1381# if CORO_PTHREAD
1382 PERL_SET_CONTEXT (coro_thx);
1383# endif
1384#endif
1385 {
830 dTHX; 1386 dTHX;
831 1387
832 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1388 /* normally we would need to skip the entersub here */
833 UNLOCK; 1389 /* not doing so will re-execute it, which is exactly what we want */
834
835 /* we now skip the entersub that lead to transfer() */
836 PL_op = PL_op->op_next; 1390 /* PL_nop = PL_nop->op_next */
837 1391
838 /* inject a fake subroutine call to cctx_init */ 1392 /* inject a fake subroutine call to cctx_init */
839 prepare_cctx (aTHX_ (coro_cctx *)arg); 1393 cctx_prepare (aTHX);
840 1394
1395 /* cctx_run is the alternative tail of transfer() */
1396 transfer_tail (aTHX);
1397
841 /* somebody or something will hit me for both perl_run and PL_restartop */ 1398 /* somebody or something will hit me for both perl_run and PL_restartop */
842 PL_restartop = PL_op; 1399 PL_restartop = PL_op;
843 perl_run (PL_curinterp); 1400 perl_run (PL_curinterp);
844
845 /* 1401 /*
1402 * Unfortunately, there is no way to get at the return values of the
1403 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1404 * runtime errors here, as this is just a random interpreter, not a thread.
1405 */
1406
1407 /*
846 * If perl-run returns we assume exit() was being called or the coro 1408 * If perl-run returns we assume exit() was being called or the coro
847 * fell off the end, which seems to be the only valid (non-bug) 1409 * fell off the end, which seems to be the only valid (non-bug)
848 * reason for perl_run to return. We try to exit by jumping to the 1410 * reason for perl_run to return. We try to exit by jumping to the
849 * bootstrap-time "top" top_env, as we cannot restore the "main" 1411 * bootstrap-time "top" top_env, as we cannot restore the "main"
850 * coroutine as Coro has no such concept 1412 * coroutine as Coro has no such concept.
1413 * This actually isn't valid with the pthread backend, but OSes requiring
1414 * that backend are too broken to do it in a standards-compliant way.
851 */ 1415 */
852 PL_top_env = main_top_env; 1416 PL_top_env = main_top_env;
853 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1417 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1418 }
854} 1419}
855 1420
856static coro_cctx * 1421static coro_cctx *
857cctx_new () 1422cctx_new ()
858{ 1423{
859 coro_cctx *cctx; 1424 coro_cctx *cctx;
1425
1426 ++cctx_count;
1427 New (0, cctx, 1, coro_cctx);
1428
1429 cctx->gen = cctx_gen;
1430 cctx->flags = 0;
1431 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1432
1433 return cctx;
1434}
1435
1436/* create a new cctx only suitable as source */
1437static coro_cctx *
1438cctx_new_empty ()
1439{
1440 coro_cctx *cctx = cctx_new ();
1441
1442 cctx->sptr = 0;
1443 coro_create (&cctx->cctx, 0, 0, 0, 0);
1444
1445 return cctx;
1446}
1447
1448/* create a new cctx suitable as destination/running a perl interpreter */
1449static coro_cctx *
1450cctx_new_run ()
1451{
1452 coro_cctx *cctx = cctx_new ();
860 void *stack_start; 1453 void *stack_start;
861 size_t stack_size; 1454 size_t stack_size;
862 1455
863 ++cctx_count;
864
865 Newz (0, cctx, 1, coro_cctx);
866
867#if HAVE_MMAP 1456#if HAVE_MMAP
868
869 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1457 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
870 /* mmap supposedly does allocate-on-write for us */ 1458 /* mmap supposedly does allocate-on-write for us */
871 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1459 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
872 1460
873 if (cctx->sptr != (void *)-1) 1461 if (cctx->sptr != (void *)-1)
874 { 1462 {
875# if CORO_STACKGUARD 1463 #if CORO_STACKGUARD
876 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1464 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
877# endif 1465 #endif
878 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1466 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
879 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1467 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
880 cctx->flags |= CC_MAPPED; 1468 cctx->flags |= CC_MAPPED;
881 } 1469 }
882 else 1470 else
883#endif 1471#endif
884 { 1472 {
885 cctx->ssize = coro_stacksize * (long)sizeof (long); 1473 cctx->ssize = cctx_stacksize * (long)sizeof (long);
886 New (0, cctx->sptr, coro_stacksize, long); 1474 New (0, cctx->sptr, cctx_stacksize, long);
887 1475
888 if (!cctx->sptr) 1476 if (!cctx->sptr)
889 { 1477 {
890 perror ("FATAL: unable to allocate stack for coroutine"); 1478 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
891 _exit (EXIT_FAILURE); 1479 _exit (EXIT_FAILURE);
892 } 1480 }
893 1481
894 stack_start = cctx->sptr; 1482 stack_start = cctx->sptr;
895 stack_size = cctx->ssize; 1483 stack_size = cctx->ssize;
896 } 1484 }
897 1485
898 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1486 #if CORO_USE_VALGRIND
1487 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1488 #endif
1489
899 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1490 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
900 1491
901 return cctx; 1492 return cctx;
902} 1493}
903 1494
904static void 1495static void
905cctx_destroy (coro_cctx *cctx) 1496cctx_destroy (coro_cctx *cctx)
906{ 1497{
907 if (!cctx) 1498 if (!cctx)
908 return; 1499 return;
909 1500
1501 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1502
910 --cctx_count; 1503 --cctx_count;
1504 coro_destroy (&cctx->cctx);
911 1505
1506 /* coro_transfer creates new, empty cctx's */
1507 if (cctx->sptr)
1508 {
912#if CORO_USE_VALGRIND 1509 #if CORO_USE_VALGRIND
913 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1510 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1511 #endif
1512
1513#if HAVE_MMAP
1514 if (cctx->flags & CC_MAPPED)
1515 munmap (cctx->sptr, cctx->ssize);
1516 else
914#endif 1517#endif
915
916#if HAVE_MMAP
917 if (cctx->flags & CC_MAPPED)
918 munmap (cctx->sptr, cctx->ssize);
919 else
920#endif
921 Safefree (cctx->sptr); 1518 Safefree (cctx->sptr);
1519 }
922 1520
923 Safefree (cctx); 1521 Safefree (cctx);
924} 1522}
1523
1524/* wether this cctx should be destructed */
1525#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
925 1526
926static coro_cctx * 1527static coro_cctx *
927cctx_get (pTHX) 1528cctx_get (pTHX)
928{ 1529{
929 while (cctx_first) 1530 while (expect_true (cctx_first))
930 { 1531 {
931 coro_cctx *cctx = cctx_first; 1532 coro_cctx *cctx = cctx_first;
932 cctx_first = cctx->next; 1533 cctx_first = cctx->next;
933 --cctx_idle; 1534 --cctx_idle;
934 1535
935 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1536 if (expect_true (!CCTX_EXPIRED (cctx)))
936 return cctx; 1537 return cctx;
937 1538
938 cctx_destroy (cctx); 1539 cctx_destroy (cctx);
939 } 1540 }
940 1541
941 return cctx_new (); 1542 return cctx_new_run ();
942} 1543}
943 1544
944static void 1545static void
945cctx_put (coro_cctx *cctx) 1546cctx_put (coro_cctx *cctx)
946{ 1547{
1548 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1549
947 /* free another cctx if overlimit */ 1550 /* free another cctx if overlimit */
948 if (cctx_idle >= MAX_IDLE_CCTX) 1551 if (expect_false (cctx_idle >= cctx_max_idle))
949 { 1552 {
950 coro_cctx *first = cctx_first; 1553 coro_cctx *first = cctx_first;
951 cctx_first = first->next; 1554 cctx_first = first->next;
952 --cctx_idle; 1555 --cctx_idle;
953 1556
… …
959 cctx_first = cctx; 1562 cctx_first = cctx;
960} 1563}
961 1564
962/** coroutine switching *****************************************************/ 1565/** coroutine switching *****************************************************/
963 1566
964static void NOINLINE 1567static void
965transfer_check (pTHX_ struct coro *prev, struct coro *next) 1568transfer_check (pTHX_ struct coro *prev, struct coro *next)
966{ 1569{
967 if (prev != next) 1570 /* TODO: throwing up here is considered harmful */
1571
1572 if (expect_true (prev != next))
968 { 1573 {
969 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1574 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
970 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1575 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
971 1576
972 if (next->flags & CF_RUNNING) 1577 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
973 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
974
975 if (next->flags & CF_DESTROYED)
976 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1578 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
977 1579
1580#if !PERL_VERSION_ATLEAST (5,10,0)
978 if (PL_lex_state != LEX_NOTPARSING) 1581 if (expect_false (PL_lex_state != LEX_NOTPARSING))
979 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1582 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1583#endif
980 } 1584 }
981} 1585}
982 1586
983/* always use the TRANSFER macro */ 1587/* always use the TRANSFER macro */
984static void NOINLINE 1588static void NOINLINE /* noinline so we have a fixed stackframe */
985transfer (pTHX_ struct coro *prev, struct coro *next) 1589transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
986{ 1590{
987 dSTACKLEVEL; 1591 dSTACKLEVEL;
988 1592
989 /* sometimes transfer is only called to set idle_sp */ 1593 /* sometimes transfer is only called to set idle_sp */
990 if (!next) 1594 if (expect_false (!prev))
991 { 1595 {
992 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1596 cctx_current->idle_sp = STACKLEVEL;
993 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1597 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
994 }
995 else if (prev != next)
996 { 1598 }
1599 else if (expect_true (prev != next))
1600 {
997 coro_cctx *prev__cctx; 1601 coro_cctx *cctx_prev;
998 1602
999 if (prev->flags & CF_NEW) 1603 if (expect_false (prev->flags & CF_NEW))
1000 { 1604 {
1001 /* create a new empty context */ 1605 /* create a new empty/source context */
1002 Newz (0, prev->cctx, 1, coro_cctx);
1003 prev->flags &= ~CF_NEW; 1606 prev->flags &= ~CF_NEW;
1004 prev->flags |= CF_RUNNING; 1607 prev->flags |= CF_RUNNING;
1005 } 1608 }
1006 1609
1007 prev->flags &= ~CF_RUNNING; 1610 prev->flags &= ~CF_RUNNING;
1008 next->flags |= CF_RUNNING; 1611 next->flags |= CF_RUNNING;
1009 1612
1010 LOCK; 1613 /* first get rid of the old state */
1614 save_perl (aTHX_ prev);
1011 1615
1012 if (next->flags & CF_NEW) 1616 if (expect_false (next->flags & CF_NEW))
1013 { 1617 {
1014 /* need to start coroutine */ 1618 /* need to start coroutine */
1015 next->flags &= ~CF_NEW; 1619 next->flags &= ~CF_NEW;
1016 /* first get rid of the old state */
1017 save_perl (aTHX_ prev);
1018 /* setup coroutine call */ 1620 /* setup coroutine call */
1019 coro_setup (aTHX_ next); 1621 init_perl (aTHX_ next);
1020 } 1622 }
1021 else 1623 else
1624 load_perl (aTHX_ next);
1625
1626 /* possibly untie and reuse the cctx */
1627 if (expect_true (
1628 cctx_current->idle_sp == STACKLEVEL
1629 && !(cctx_current->flags & CC_TRACE)
1630 && !force_cctx
1631 ))
1022 { 1632 {
1023 /* coroutine already started */ 1633 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1024 save_perl (aTHX_ prev); 1634 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1025 load_perl (aTHX_ next); 1635
1636 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1637 /* without this the next cctx_get might destroy the running cctx while still in use */
1638 if (expect_false (CCTX_EXPIRED (cctx_current)))
1639 if (expect_true (!next->cctx))
1640 next->cctx = cctx_get (aTHX);
1641
1642 cctx_put (cctx_current);
1026 } 1643 }
1644 else
1645 prev->cctx = cctx_current;
1027 1646
1028 prev__cctx = prev->cctx; 1647 ++next->usecount;
1029 1648
1030 /* possibly "free" the cctx */ 1649 cctx_prev = cctx_current;
1031 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1650 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1651
1652 next->cctx = 0;
1653
1654 if (expect_false (cctx_prev != cctx_current))
1032 { 1655 {
1033 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1656 cctx_prev->top_env = PL_top_env;
1034 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1657 PL_top_env = cctx_current->top_env;
1035 1658 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1036 prev->cctx = 0;
1037
1038 cctx_put (prev__cctx);
1039 } 1659 }
1040 1660
1041 ++next->usecount; 1661 transfer_tail (aTHX);
1042
1043 if (!next->cctx)
1044 next->cctx = cctx_get (aTHX);
1045
1046 if (prev__cctx != next->cctx)
1047 {
1048 prev__cctx->top_env = PL_top_env;
1049 PL_top_env = next->cctx->top_env;
1050 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1051 }
1052
1053 free_coro_mortal (aTHX);
1054 UNLOCK;
1055 } 1662 }
1056} 1663}
1057 1664
1058struct transfer_args
1059{
1060 struct coro *prev, *next;
1061};
1062
1063#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1665#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1064#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1666#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1065 1667
1066/** high level stuff ********************************************************/ 1668/** high level stuff ********************************************************/
1067 1669
1068static int 1670static int
1069coro_state_destroy (pTHX_ struct coro *coro) 1671coro_state_destroy (pTHX_ struct coro *coro)
1070{ 1672{
1071 if (coro->flags & CF_DESTROYED) 1673 if (coro->flags & CF_DESTROYED)
1072 return 0; 1674 return 0;
1675
1676 if (coro->on_destroy && !PL_dirty)
1677 coro->on_destroy (aTHX_ coro);
1073 1678
1074 coro->flags |= CF_DESTROYED; 1679 coro->flags |= CF_DESTROYED;
1075 1680
1076 if (coro->flags & CF_READY) 1681 if (coro->flags & CF_READY)
1077 { 1682 {
1078 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1683 /* reduce nready, as destroying a ready coro effectively unreadies it */
1079 /* alternative: look through all ready queues and remove the coro */ 1684 /* alternative: look through all ready queues and remove the coro */
1080 LOCK;
1081 --coro_nready; 1685 --coro_nready;
1082 UNLOCK;
1083 } 1686 }
1084 else 1687 else
1085 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1688 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1086 1689
1087 if (coro->mainstack && coro->mainstack != main_mainstack) 1690 if (coro->mainstack
1088 { 1691 && coro->mainstack != main_mainstack
1089 struct coro temp; 1692 && coro->slot
1090 1693 && !PL_dirty)
1091 if (coro->flags & CF_RUNNING)
1092 croak ("FATAL: tried to destroy currently running coroutine");
1093
1094 save_perl (aTHX_ &temp);
1095 load_perl (aTHX_ coro); 1694 destroy_perl (aTHX_ coro);
1096
1097 coro_destroy (aTHX_ coro);
1098
1099 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1100
1101 coro->mainstack = 0;
1102 }
1103
1104 cctx_destroy (coro->cctx);
1105 SvREFCNT_dec (coro->args);
1106 1695
1107 if (coro->next) coro->next->prev = coro->prev; 1696 if (coro->next) coro->next->prev = coro->prev;
1108 if (coro->prev) coro->prev->next = coro->next; 1697 if (coro->prev) coro->prev->next = coro->next;
1109 if (coro == coro_first) coro_first = coro->next; 1698 if (coro == coro_first) coro_first = coro->next;
1699
1700 cctx_destroy (coro->cctx);
1701 SvREFCNT_dec (coro->startcv);
1702 SvREFCNT_dec (coro->args);
1703 SvREFCNT_dec (coro->swap_sv);
1704 SvREFCNT_dec (CORO_THROW);
1110 1705
1111 return 1; 1706 return 1;
1112} 1707}
1113 1708
1114static int 1709static int
… …
1148# define MGf_DUP 0 1743# define MGf_DUP 0
1149#endif 1744#endif
1150}; 1745};
1151 1746
1152static void 1747static void
1153prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1748prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1154{ 1749{
1155 ta->prev = SvSTATE (prev_sv); 1750 ta->prev = SvSTATE (prev_sv);
1156 ta->next = SvSTATE (next_sv); 1751 ta->next = SvSTATE (next_sv);
1157 TRANSFER_CHECK (*ta); 1752 TRANSFER_CHECK (*ta);
1158} 1753}
1159 1754
1160static void 1755static void
1161api_transfer (SV *prev_sv, SV *next_sv) 1756api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1757{
1758 struct coro_transfer_args ta;
1759
1760 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1761 TRANSFER (ta, 1);
1762}
1763
1764/** Coro ********************************************************************/
1765
1766INLINE void
1767coro_enq (pTHX_ struct coro *coro)
1768{
1769 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1770
1771 SvREFCNT_inc_NN (coro->hv);
1772
1773 coro->next_ready = 0;
1774 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1775 ready [1] = coro;
1776}
1777
1778INLINE struct coro *
1779coro_deq (pTHX)
1780{
1781 int prio;
1782
1783 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1784 {
1785 struct coro **ready = coro_ready [prio];
1786
1787 if (ready [0])
1788 {
1789 struct coro *coro = ready [0];
1790 ready [0] = coro->next_ready;
1791 return coro;
1792 }
1793 }
1794
1795 return 0;
1796}
1797
1798static void
1799invoke_sv_ready_hook_helper (void)
1162{ 1800{
1163 dTHX; 1801 dTHX;
1164 struct transfer_args ta; 1802 dSP;
1165 1803
1166 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1804 ENTER;
1167 TRANSFER (ta); 1805 SAVETMPS;
1168}
1169 1806
1170/** Coro ********************************************************************/ 1807 PUSHMARK (SP);
1808 PUTBACK;
1809 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1171 1810
1172static void 1811 FREETMPS;
1173coro_enq (pTHX_ SV *coro_sv) 1812 LEAVE;
1174{
1175 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1176}
1177
1178static SV *
1179coro_deq (pTHX_ int min_prio)
1180{
1181 int prio = PRIO_MAX - PRIO_MIN;
1182
1183 min_prio -= PRIO_MIN;
1184 if (min_prio < 0)
1185 min_prio = 0;
1186
1187 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1188 if (AvFILLp (coro_ready [prio]) >= 0)
1189 return av_shift (coro_ready [prio]);
1190
1191 return 0;
1192} 1813}
1193 1814
1194static int 1815static int
1195api_ready (SV *coro_sv) 1816api_ready (pTHX_ SV *coro_sv)
1196{ 1817{
1197 dTHX;
1198 struct coro *coro;
1199
1200 if (SvROK (coro_sv))
1201 coro_sv = SvRV (coro_sv);
1202
1203 coro = SvSTATE (coro_sv); 1818 struct coro *coro = SvSTATE (coro_sv);
1204 1819
1205 if (coro->flags & CF_READY) 1820 if (coro->flags & CF_READY)
1206 return 0; 1821 return 0;
1207 1822
1208 coro->flags |= CF_READY; 1823 coro->flags |= CF_READY;
1209 1824
1210 LOCK; 1825 coro_enq (aTHX_ coro);
1211 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1826
1212 ++coro_nready; 1827 if (!coro_nready++)
1213 UNLOCK; 1828 if (coroapi.readyhook)
1829 coroapi.readyhook ();
1214 1830
1215 return 1; 1831 return 1;
1216} 1832}
1217 1833
1218static int 1834static int
1219api_is_ready (SV *coro_sv) 1835api_is_ready (pTHX_ SV *coro_sv)
1220{ 1836{
1221 dTHX;
1222 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1837 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1223} 1838}
1224 1839
1225static void 1840/* expects to own a reference to next->hv */
1841INLINE void
1226prepare_schedule (pTHX_ struct transfer_args *ta) 1842prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1227{ 1843{
1228 SV *prev_sv, *next_sv;
1229
1230 for (;;)
1231 {
1232 LOCK;
1233 next_sv = coro_deq (aTHX_ PRIO_MIN);
1234
1235 /* nothing to schedule: call the idle handler */
1236 if (!next_sv)
1237 {
1238 dSP;
1239 UNLOCK;
1240
1241 ENTER;
1242 SAVETMPS;
1243
1244 PUSHMARK (SP);
1245 PUTBACK;
1246 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1247
1248 FREETMPS;
1249 LEAVE;
1250 continue;
1251 }
1252
1253 ta->next = SvSTATE (next_sv);
1254
1255 /* cannot transfer to destroyed coros, skip and look for next */
1256 if (ta->next->flags & CF_DESTROYED)
1257 {
1258 UNLOCK;
1259 SvREFCNT_dec (next_sv);
1260 /* coro_nready is already taken care of by destroy */
1261 continue;
1262 }
1263
1264 --coro_nready;
1265 UNLOCK;
1266 break;
1267 }
1268
1269 /* free this only after the transfer */
1270 prev_sv = SvRV (coro_current); 1844 SV *prev_sv = SvRV (coro_current);
1845
1271 ta->prev = SvSTATE (prev_sv); 1846 ta->prev = SvSTATE_hv (prev_sv);
1847 ta->next = next;
1848
1272 TRANSFER_CHECK (*ta); 1849 TRANSFER_CHECK (*ta);
1273 assert (ta->next->flags & CF_READY); 1850
1274 ta->next->flags &= ~CF_READY;
1275 SvRV_set (coro_current, next_sv); 1851 SvRV_set (coro_current, (SV *)next->hv);
1276 1852
1277 LOCK;
1278 free_coro_mortal (aTHX); 1853 free_coro_mortal (aTHX);
1279 coro_mortal = prev_sv; 1854 coro_mortal = prev_sv;
1280 UNLOCK;
1281} 1855}
1282 1856
1283static void 1857static void
1858prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1859{
1860 for (;;)
1861 {
1862 struct coro *next = coro_deq (aTHX);
1863
1864 if (expect_true (next))
1865 {
1866 /* cannot transfer to destroyed coros, skip and look for next */
1867 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1868 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1869 else
1870 {
1871 next->flags &= ~CF_READY;
1872 --coro_nready;
1873
1874 prepare_schedule_to (aTHX_ ta, next);
1875 break;
1876 }
1877 }
1878 else
1879 {
1880 /* nothing to schedule: call the idle handler */
1881 if (SvROK (sv_idle)
1882 && SvOBJECT (SvRV (sv_idle)))
1883 {
1884 if (SvRV (sv_idle) == SvRV (coro_current))
1885 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1886
1887 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1888 api_ready (aTHX_ SvRV (sv_idle));
1889 --coro_nready;
1890 }
1891 else
1892 {
1893 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1894 dSP;
1895
1896 ENTER;
1897 SAVETMPS;
1898
1899 PUSHMARK (SP);
1900 PUTBACK;
1901 call_sv (sv_idle, G_VOID | G_DISCARD);
1902
1903 FREETMPS;
1904 LEAVE;
1905 }
1906 }
1907 }
1908}
1909
1910INLINE void
1284prepare_cede (pTHX_ struct transfer_args *ta) 1911prepare_cede (pTHX_ struct coro_transfer_args *ta)
1285{ 1912{
1286 api_ready (coro_current); 1913 api_ready (aTHX_ coro_current);
1287 prepare_schedule (aTHX_ ta); 1914 prepare_schedule (aTHX_ ta);
1288} 1915}
1289 1916
1917INLINE void
1918prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1919{
1920 SV *prev = SvRV (coro_current);
1921
1922 if (coro_nready)
1923 {
1924 prepare_schedule (aTHX_ ta);
1925 api_ready (aTHX_ prev);
1926 }
1927 else
1928 prepare_nop (aTHX_ ta);
1929}
1930
1931static void
1932api_schedule (pTHX)
1933{
1934 struct coro_transfer_args ta;
1935
1936 prepare_schedule (aTHX_ &ta);
1937 TRANSFER (ta, 1);
1938}
1939
1940static void
1941api_schedule_to (pTHX_ SV *coro_sv)
1942{
1943 struct coro_transfer_args ta;
1944 struct coro *next = SvSTATE (coro_sv);
1945
1946 SvREFCNT_inc_NN (coro_sv);
1947 prepare_schedule_to (aTHX_ &ta, next);
1948}
1949
1290static int 1950static int
1291prepare_cede_notself (pTHX_ struct transfer_args *ta) 1951api_cede (pTHX)
1292{ 1952{
1293 if (coro_nready) 1953 struct coro_transfer_args ta;
1294 { 1954
1295 SV *prev = SvRV (coro_current);
1296 prepare_schedule (aTHX_ ta); 1955 prepare_cede (aTHX_ &ta);
1297 api_ready (prev); 1956
1957 if (expect_true (ta.prev != ta.next))
1958 {
1959 TRANSFER (ta, 1);
1298 return 1; 1960 return 1;
1299 } 1961 }
1300 else 1962 else
1301 return 0; 1963 return 0;
1302} 1964}
1303 1965
1304static void
1305api_schedule (void)
1306{
1307 dTHX;
1308 struct transfer_args ta;
1309
1310 prepare_schedule (aTHX_ &ta);
1311 TRANSFER (ta);
1312}
1313
1314static int 1966static int
1315api_cede (void) 1967api_cede_notself (pTHX)
1316{ 1968{
1317 dTHX; 1969 if (coro_nready)
1970 {
1318 struct transfer_args ta; 1971 struct coro_transfer_args ta;
1319 1972
1320 prepare_cede (aTHX_ &ta); 1973 prepare_cede_notself (aTHX_ &ta);
1321
1322 if (ta.prev != ta.next)
1323 {
1324 TRANSFER (ta); 1974 TRANSFER (ta, 1);
1325 return 1; 1975 return 1;
1326 } 1976 }
1327 else 1977 else
1328 return 0; 1978 return 0;
1329} 1979}
1330 1980
1331static int 1981static void
1332api_cede_notself (void)
1333{
1334 dTHX;
1335 struct transfer_args ta;
1336
1337 if (prepare_cede_notself (aTHX_ &ta))
1338 {
1339 TRANSFER (ta);
1340 return 1;
1341 }
1342 else
1343 return 0;
1344}
1345
1346static void
1347api_trace (SV *coro_sv, int flags) 1982api_trace (pTHX_ SV *coro_sv, int flags)
1348{ 1983{
1349 dTHX;
1350 struct coro *coro = SvSTATE (coro_sv); 1984 struct coro *coro = SvSTATE (coro_sv);
1351 1985
1986 if (coro->flags & CF_RUNNING)
1987 croak ("cannot enable tracing on a running coroutine, caught");
1988
1352 if (flags & CC_TRACE) 1989 if (flags & CC_TRACE)
1353 { 1990 {
1354 if (!coro->cctx) 1991 if (!coro->cctx)
1355 coro->cctx = cctx_new (); 1992 coro->cctx = cctx_new_run ();
1356 else if (!(coro->cctx->flags & CC_TRACE)) 1993 else if (!(coro->cctx->flags & CC_TRACE))
1357 croak ("cannot enable tracing on coroutine with custom stack"); 1994 croak ("cannot enable tracing on coroutine with custom stack, caught");
1358 1995
1359 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1996 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1360 } 1997 }
1361 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1998 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1362 { 1999 {
1363 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2000 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1364 2001
1365 if (coro->flags & CF_RUNNING) 2002 if (coro->flags & CF_RUNNING)
1366 PL_runops = RUNOPS_DEFAULT; 2003 PL_runops = RUNOPS_DEFAULT;
1367 else 2004 else
1368 coro->runops = RUNOPS_DEFAULT; 2005 coro->slot->runops = RUNOPS_DEFAULT;
2006 }
2007}
2008
2009static void
2010coro_call_on_destroy (pTHX_ struct coro *coro)
2011{
2012 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2013 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2014
2015 if (on_destroyp)
2016 {
2017 AV *on_destroy = (AV *)SvRV (*on_destroyp);
2018
2019 while (AvFILLp (on_destroy) >= 0)
2020 {
2021 dSP; /* don't disturb outer sp */
2022 SV *cb = av_pop (on_destroy);
2023
2024 PUSHMARK (SP);
2025
2026 if (statusp)
2027 {
2028 int i;
2029 AV *status = (AV *)SvRV (*statusp);
2030 EXTEND (SP, AvFILLp (status) + 1);
2031
2032 for (i = 0; i <= AvFILLp (status); ++i)
2033 PUSHs (AvARRAY (status)[i]);
2034 }
2035
2036 PUTBACK;
2037 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2038 }
2039 }
2040}
2041
2042static void
2043slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2044{
2045 int i;
2046 HV *hv = (HV *)SvRV (coro_current);
2047 AV *av = newAV ();
2048
2049 /* items are actually not so common, so optimise for this case */
2050 if (items)
2051 {
2052 av_extend (av, items - 1);
2053
2054 for (i = 0; i < items; ++i)
2055 av_push (av, SvREFCNT_inc_NN (arg [i]));
2056 }
2057
2058 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2059
2060 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2061 api_ready (aTHX_ sv_manager);
2062
2063 frame->prepare = prepare_schedule;
2064 frame->check = slf_check_repeat;
2065
2066 /* as a minor optimisation, we could unwind all stacks here */
2067 /* but that puts extra pressure on pp_slf, and is not worth much */
2068 /*coro_unwind_stacks (aTHX);*/
2069}
2070
2071/*****************************************************************************/
2072/* async pool handler */
2073
2074static int
2075slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2076{
2077 HV *hv = (HV *)SvRV (coro_current);
2078 struct coro *coro = (struct coro *)frame->data;
2079
2080 if (!coro->invoke_cb)
2081 return 1; /* loop till we have invoke */
2082 else
2083 {
2084 hv_store (hv, "desc", sizeof ("desc") - 1,
2085 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2086
2087 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2088
2089 {
2090 dSP;
2091 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2092 PUTBACK;
1369 } 2093 }
2094
2095 SvREFCNT_dec (GvAV (PL_defgv));
2096 GvAV (PL_defgv) = coro->invoke_av;
2097 coro->invoke_av = 0;
2098
2099 return 0;
2100 }
2101}
2102
2103static void
2104slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2105{
2106 HV *hv = (HV *)SvRV (coro_current);
2107 struct coro *coro = SvSTATE_hv ((SV *)hv);
2108
2109 if (expect_true (coro->saved_deffh))
2110 {
2111 /* subsequent iteration */
2112 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2113 coro->saved_deffh = 0;
2114
2115 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2116 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2117 {
2118 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2119 coro->invoke_av = newAV ();
2120
2121 frame->prepare = prepare_nop;
2122 }
2123 else
2124 {
2125 av_clear (GvAV (PL_defgv));
2126 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2127
2128 coro->prio = 0;
2129
2130 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2131 api_trace (aTHX_ coro_current, 0);
2132
2133 frame->prepare = prepare_schedule;
2134 av_push (av_async_pool, SvREFCNT_inc (hv));
2135 }
2136 }
2137 else
2138 {
2139 /* first iteration, simply fall through */
2140 frame->prepare = prepare_nop;
2141 }
2142
2143 frame->check = slf_check_pool_handler;
2144 frame->data = (void *)coro;
2145}
2146
2147/*****************************************************************************/
2148/* rouse callback */
2149
2150#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2151
2152static void
2153coro_rouse_callback (pTHX_ CV *cv)
2154{
2155 dXSARGS;
2156 SV *data = (SV *)S_GENSUB_ARG;
2157
2158 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2159 {
2160 /* first call, set args */
2161 SV *coro = SvRV (data);
2162 AV *av = newAV ();
2163
2164 SvRV_set (data, (SV *)av);
2165
2166 /* better take a full copy of the arguments */
2167 while (items--)
2168 av_store (av, items, newSVsv (ST (items)));
2169
2170 api_ready (aTHX_ coro);
2171 SvREFCNT_dec (coro);
2172 }
2173
2174 XSRETURN_EMPTY;
2175}
2176
2177static int
2178slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2179{
2180 SV *data = (SV *)frame->data;
2181
2182 if (CORO_THROW)
2183 return 0;
2184
2185 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2186 return 1;
2187
2188 /* now push all results on the stack */
2189 {
2190 dSP;
2191 AV *av = (AV *)SvRV (data);
2192 int i;
2193
2194 EXTEND (SP, AvFILLp (av) + 1);
2195 for (i = 0; i <= AvFILLp (av); ++i)
2196 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2197
2198 /* we have stolen the elements, so set length to zero and free */
2199 AvFILLp (av) = -1;
2200 av_undef (av);
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 SV *cb;
2212
2213 if (items)
2214 cb = arg [0];
2215 else
2216 {
2217 struct coro *coro = SvSTATE_current;
2218
2219 if (!coro->rouse_cb)
2220 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2221
2222 cb = sv_2mortal (coro->rouse_cb);
2223 coro->rouse_cb = 0;
2224 }
2225
2226 if (!SvROK (cb)
2227 || SvTYPE (SvRV (cb)) != SVt_PVCV
2228 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2229 croak ("Coro::rouse_wait called with illegal callback argument,");
2230
2231 {
2232 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2233 SV *data = (SV *)S_GENSUB_ARG;
2234
2235 frame->data = (void *)data;
2236 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2237 frame->check = slf_check_rouse_wait;
2238 }
2239}
2240
2241static SV *
2242coro_new_rouse_cb (pTHX)
2243{
2244 HV *hv = (HV *)SvRV (coro_current);
2245 struct coro *coro = SvSTATE_hv (hv);
2246 SV *data = newRV_inc ((SV *)hv);
2247 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2248
2249 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2250 SvREFCNT_dec (data); /* magicext increases the refcount */
2251
2252 SvREFCNT_dec (coro->rouse_cb);
2253 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2254
2255 return cb;
2256}
2257
2258/*****************************************************************************/
2259/* schedule-like-function opcode (SLF) */
2260
2261static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2262static const CV *slf_cv;
2263static SV **slf_argv;
2264static int slf_argc, slf_arga; /* count, allocated */
2265static I32 slf_ax; /* top of stack, for restore */
2266
2267/* this restores the stack in the case we patched the entersub, to */
2268/* recreate the stack frame as perl will on following calls */
2269/* since entersub cleared the stack */
2270static OP *
2271pp_restore (pTHX)
2272{
2273 int i;
2274 SV **SP = PL_stack_base + slf_ax;
2275
2276 PUSHMARK (SP);
2277
2278 EXTEND (SP, slf_argc + 1);
2279
2280 for (i = 0; i < slf_argc; ++i)
2281 PUSHs (sv_2mortal (slf_argv [i]));
2282
2283 PUSHs ((SV *)CvGV (slf_cv));
2284
2285 RETURNOP (slf_restore.op_first);
2286}
2287
2288static void
2289slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2290{
2291 SV **arg = (SV **)slf_frame.data;
2292
2293 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2294}
2295
2296static void
2297slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 if (items != 2)
2300 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2301
2302 frame->prepare = slf_prepare_transfer;
2303 frame->check = slf_check_nop;
2304 frame->data = (void *)arg; /* let's hope it will stay valid */
2305}
2306
2307static void
2308slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2309{
2310 frame->prepare = prepare_schedule;
2311 frame->check = slf_check_nop;
2312}
2313
2314static void
2315slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2316{
2317 struct coro *next = (struct coro *)slf_frame.data;
2318
2319 SvREFCNT_inc_NN (next->hv);
2320 prepare_schedule_to (aTHX_ ta, next);
2321}
2322
2323static void
2324slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 if (!items)
2327 croak ("Coro::schedule_to expects a coroutine argument, caught");
2328
2329 frame->data = (void *)SvSTATE (arg [0]);
2330 frame->prepare = slf_prepare_schedule_to;
2331 frame->check = slf_check_nop;
2332}
2333
2334static void
2335slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2336{
2337 api_ready (aTHX_ SvRV (coro_current));
2338
2339 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2340}
2341
2342static void
2343slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2344{
2345 frame->prepare = prepare_cede;
2346 frame->check = slf_check_nop;
2347}
2348
2349static void
2350slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 frame->prepare = prepare_cede_notself;
2353 frame->check = slf_check_nop;
2354}
2355
2356/*
2357 * these not obviously related functions are all rolled into one
2358 * function to increase chances that they all will call transfer with the same
2359 * stack offset
2360 * SLF stands for "schedule-like-function".
2361 */
2362static OP *
2363pp_slf (pTHX)
2364{
2365 I32 checkmark; /* mark SP to see how many elements check has pushed */
2366
2367 /* set up the slf frame, unless it has already been set-up */
2368 /* the latter happens when a new coro has been started */
2369 /* or when a new cctx was attached to an existing coroutine */
2370 if (expect_true (!slf_frame.prepare))
2371 {
2372 /* first iteration */
2373 dSP;
2374 SV **arg = PL_stack_base + TOPMARK + 1;
2375 int items = SP - arg; /* args without function object */
2376 SV *gv = *sp;
2377
2378 /* do a quick consistency check on the "function" object, and if it isn't */
2379 /* for us, divert to the real entersub */
2380 if (SvTYPE (gv) != SVt_PVGV
2381 || !GvCV (gv)
2382 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2383 return PL_ppaddr[OP_ENTERSUB](aTHX);
2384
2385 if (!(PL_op->op_flags & OPf_STACKED))
2386 {
2387 /* ampersand-form of call, use @_ instead of stack */
2388 AV *av = GvAV (PL_defgv);
2389 arg = AvARRAY (av);
2390 items = AvFILLp (av) + 1;
2391 }
2392
2393 /* now call the init function, which needs to set up slf_frame */
2394 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2395 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2396
2397 /* pop args */
2398 SP = PL_stack_base + POPMARK;
2399
2400 PUTBACK;
2401 }
2402
2403 /* now that we have a slf_frame, interpret it! */
2404 /* we use a callback system not to make the code needlessly */
2405 /* complicated, but so we can run multiple perl coros from one cctx */
2406
2407 do
2408 {
2409 struct coro_transfer_args ta;
2410
2411 slf_frame.prepare (aTHX_ &ta);
2412 TRANSFER (ta, 0);
2413
2414 checkmark = PL_stack_sp - PL_stack_base;
2415 }
2416 while (slf_frame.check (aTHX_ &slf_frame));
2417
2418 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2419
2420 /* exception handling */
2421 if (expect_false (CORO_THROW))
2422 {
2423 SV *exception = sv_2mortal (CORO_THROW);
2424
2425 CORO_THROW = 0;
2426 sv_setsv (ERRSV, exception);
2427 croak (0);
2428 }
2429
2430 /* return value handling - mostly like entersub */
2431 /* make sure we put something on the stack in scalar context */
2432 if (GIMME_V == G_SCALAR)
2433 {
2434 dSP;
2435 SV **bot = PL_stack_base + checkmark;
2436
2437 if (sp == bot) /* too few, push undef */
2438 bot [1] = &PL_sv_undef;
2439 else if (sp != bot + 1) /* too many, take last one */
2440 bot [1] = *sp;
2441
2442 SP = bot + 1;
2443
2444 PUTBACK;
2445 }
2446
2447 return NORMAL;
2448}
2449
2450static void
2451api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2452{
2453 int i;
2454 SV **arg = PL_stack_base + ax;
2455 int items = PL_stack_sp - arg + 1;
2456
2457 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2458
2459 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2460 && PL_op->op_ppaddr != pp_slf)
2461 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2462
2463 CvFLAGS (cv) |= CVf_SLF;
2464 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2465 slf_cv = cv;
2466
2467 /* we patch the op, and then re-run the whole call */
2468 /* we have to put the same argument on the stack for this to work */
2469 /* and this will be done by pp_restore */
2470 slf_restore.op_next = (OP *)&slf_restore;
2471 slf_restore.op_type = OP_CUSTOM;
2472 slf_restore.op_ppaddr = pp_restore;
2473 slf_restore.op_first = PL_op;
2474
2475 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2476
2477 if (PL_op->op_flags & OPf_STACKED)
2478 {
2479 if (items > slf_arga)
2480 {
2481 slf_arga = items;
2482 Safefree (slf_argv);
2483 New (0, slf_argv, slf_arga, SV *);
2484 }
2485
2486 slf_argc = items;
2487
2488 for (i = 0; i < items; ++i)
2489 slf_argv [i] = SvREFCNT_inc (arg [i]);
2490 }
2491 else
2492 slf_argc = 0;
2493
2494 PL_op->op_ppaddr = pp_slf;
2495 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2496
2497 PL_op = (OP *)&slf_restore;
2498}
2499
2500/*****************************************************************************/
2501/* dynamic wind */
2502
2503static void
2504on_enterleave_call (pTHX_ SV *cb)
2505{
2506 dSP;
2507
2508 PUSHSTACK;
2509
2510 PUSHMARK (SP);
2511 PUTBACK;
2512 call_sv (cb, G_VOID | G_DISCARD);
2513 SPAGAIN;
2514
2515 POPSTACK;
2516}
2517
2518static SV *
2519coro_avp_pop_and_free (pTHX_ AV **avp)
2520{
2521 AV *av = *avp;
2522 SV *res = av_pop (av);
2523
2524 if (AvFILLp (av) < 0)
2525 {
2526 *avp = 0;
2527 SvREFCNT_dec (av);
2528 }
2529
2530 return res;
2531}
2532
2533static void
2534coro_pop_on_enter (pTHX_ void *coro)
2535{
2536 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2537 SvREFCNT_dec (cb);
2538}
2539
2540static void
2541coro_pop_on_leave (pTHX_ void *coro)
2542{
2543 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2544 on_enterleave_call (aTHX_ sv_2mortal (cb));
2545}
2546
2547/*****************************************************************************/
2548/* PerlIO::cede */
2549
2550typedef struct
2551{
2552 PerlIOBuf base;
2553 NV next, every;
2554} PerlIOCede;
2555
2556static IV
2557PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2558{
2559 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2560
2561 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2562 self->next = nvtime () + self->every;
2563
2564 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2565}
2566
2567static SV *
2568PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2569{
2570 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2571
2572 return newSVnv (self->every);
2573}
2574
2575static IV
2576PerlIOCede_flush (pTHX_ PerlIO *f)
2577{
2578 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2579 double now = nvtime ();
2580
2581 if (now >= self->next)
2582 {
2583 api_cede (aTHX);
2584 self->next = now + self->every;
2585 }
2586
2587 return PerlIOBuf_flush (aTHX_ f);
2588}
2589
2590static PerlIO_funcs PerlIO_cede =
2591{
2592 sizeof(PerlIO_funcs),
2593 "cede",
2594 sizeof(PerlIOCede),
2595 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2596 PerlIOCede_pushed,
2597 PerlIOBuf_popped,
2598 PerlIOBuf_open,
2599 PerlIOBase_binmode,
2600 PerlIOCede_getarg,
2601 PerlIOBase_fileno,
2602 PerlIOBuf_dup,
2603 PerlIOBuf_read,
2604 PerlIOBuf_unread,
2605 PerlIOBuf_write,
2606 PerlIOBuf_seek,
2607 PerlIOBuf_tell,
2608 PerlIOBuf_close,
2609 PerlIOCede_flush,
2610 PerlIOBuf_fill,
2611 PerlIOBase_eof,
2612 PerlIOBase_error,
2613 PerlIOBase_clearerr,
2614 PerlIOBase_setlinebuf,
2615 PerlIOBuf_get_base,
2616 PerlIOBuf_bufsiz,
2617 PerlIOBuf_get_ptr,
2618 PerlIOBuf_get_cnt,
2619 PerlIOBuf_set_ptrcnt,
2620};
2621
2622/*****************************************************************************/
2623/* Coro::Semaphore & Coro::Signal */
2624
2625static SV *
2626coro_waitarray_new (pTHX_ int count)
2627{
2628 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2629 AV *av = newAV ();
2630 SV **ary;
2631
2632 /* unfortunately, building manually saves memory */
2633 Newx (ary, 2, SV *);
2634 AvALLOC (av) = ary;
2635#if PERL_VERSION_ATLEAST (5,10,0)
2636 AvARRAY (av) = ary;
2637#else
2638 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2639 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2640 SvPVX ((SV *)av) = (char *)ary;
2641#endif
2642 AvMAX (av) = 1;
2643 AvFILLp (av) = 0;
2644 ary [0] = newSViv (count);
2645
2646 return newRV_noinc ((SV *)av);
2647}
2648
2649/* semaphore */
2650
2651static void
2652coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2653{
2654 SV *count_sv = AvARRAY (av)[0];
2655 IV count = SvIVX (count_sv);
2656
2657 count += adjust;
2658 SvIVX (count_sv) = count;
2659
2660 /* now wake up as many waiters as are expected to lock */
2661 while (count > 0 && AvFILLp (av) > 0)
2662 {
2663 SV *cb;
2664
2665 /* swap first two elements so we can shift a waiter */
2666 AvARRAY (av)[0] = AvARRAY (av)[1];
2667 AvARRAY (av)[1] = count_sv;
2668 cb = av_shift (av);
2669
2670 if (SvOBJECT (cb))
2671 {
2672 api_ready (aTHX_ cb);
2673 --count;
2674 }
2675 else if (SvTYPE (cb) == SVt_PVCV)
2676 {
2677 dSP;
2678 PUSHMARK (SP);
2679 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2680 PUTBACK;
2681 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2682 }
2683
2684 SvREFCNT_dec (cb);
2685 }
2686}
2687
2688static void
2689coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2690{
2691 /* call $sem->adjust (0) to possibly wake up some other waiters */
2692 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2693}
2694
2695static int
2696slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2697{
2698 AV *av = (AV *)frame->data;
2699 SV *count_sv = AvARRAY (av)[0];
2700
2701 /* if we are about to throw, don't actually acquire the lock, just throw */
2702 if (CORO_THROW)
2703 return 0;
2704 else if (SvIVX (count_sv) > 0)
2705 {
2706 SvSTATE_current->on_destroy = 0;
2707
2708 if (acquire)
2709 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2710 else
2711 coro_semaphore_adjust (aTHX_ av, 0);
2712
2713 return 0;
2714 }
2715 else
2716 {
2717 int i;
2718 /* if we were woken up but can't down, we look through the whole */
2719 /* waiters list and only add us if we aren't in there already */
2720 /* this avoids some degenerate memory usage cases */
2721
2722 for (i = 1; i <= AvFILLp (av); ++i)
2723 if (AvARRAY (av)[i] == SvRV (coro_current))
2724 return 1;
2725
2726 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2727 return 1;
2728 }
2729}
2730
2731static int
2732slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2733{
2734 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2735}
2736
2737static int
2738slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2739{
2740 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2741}
2742
2743static void
2744slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2745{
2746 AV *av = (AV *)SvRV (arg [0]);
2747
2748 if (SvIVX (AvARRAY (av)[0]) > 0)
2749 {
2750 frame->data = (void *)av;
2751 frame->prepare = prepare_nop;
2752 }
2753 else
2754 {
2755 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2756
2757 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2758 frame->prepare = prepare_schedule;
2759
2760 /* to avoid race conditions when a woken-up coro gets terminated */
2761 /* we arrange for a temporary on_destroy that calls adjust (0) */
2762 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2763 }
2764}
2765
2766static void
2767slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2768{
2769 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2770 frame->check = slf_check_semaphore_down;
2771}
2772
2773static void
2774slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2775{
2776 if (items >= 2)
2777 {
2778 /* callback form */
2779 AV *av = (AV *)SvRV (arg [0]);
2780 SV *cb_cv = s_get_cv_croak (arg [1]);
2781
2782 av_push (av, SvREFCNT_inc_NN (cb_cv));
2783
2784 if (SvIVX (AvARRAY (av)[0]) > 0)
2785 coro_semaphore_adjust (aTHX_ av, 0);
2786
2787 frame->prepare = prepare_nop;
2788 frame->check = slf_check_nop;
2789 }
2790 else
2791 {
2792 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2793 frame->check = slf_check_semaphore_wait;
2794 }
2795}
2796
2797/* signal */
2798
2799static void
2800coro_signal_wake (pTHX_ AV *av, int count)
2801{
2802 SvIVX (AvARRAY (av)[0]) = 0;
2803
2804 /* now signal count waiters */
2805 while (count > 0 && AvFILLp (av) > 0)
2806 {
2807 SV *cb;
2808
2809 /* swap first two elements so we can shift a waiter */
2810 cb = AvARRAY (av)[0];
2811 AvARRAY (av)[0] = AvARRAY (av)[1];
2812 AvARRAY (av)[1] = cb;
2813
2814 cb = av_shift (av);
2815
2816 if (SvTYPE (cb) == SVt_PVCV)
2817 {
2818 dSP;
2819 PUSHMARK (SP);
2820 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2821 PUTBACK;
2822 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2823 }
2824 else
2825 {
2826 api_ready (aTHX_ cb);
2827 sv_setiv (cb, 0); /* signal waiter */
2828 }
2829
2830 SvREFCNT_dec (cb);
2831
2832 --count;
2833 }
2834}
2835
2836static int
2837slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2838{
2839 /* if we are about to throw, also stop waiting */
2840 return SvROK ((SV *)frame->data) && !CORO_THROW;
2841}
2842
2843static void
2844slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2845{
2846 AV *av = (AV *)SvRV (arg [0]);
2847
2848 if (items >= 2)
2849 {
2850 SV *cb_cv = s_get_cv_croak (arg [1]);
2851 av_push (av, SvREFCNT_inc_NN (cb_cv));
2852
2853 if (SvIVX (AvARRAY (av)[0]))
2854 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2855
2856 frame->prepare = prepare_nop;
2857 frame->check = slf_check_nop;
2858 }
2859 else if (SvIVX (AvARRAY (av)[0]))
2860 {
2861 SvIVX (AvARRAY (av)[0]) = 0;
2862 frame->prepare = prepare_nop;
2863 frame->check = slf_check_nop;
2864 }
2865 else
2866 {
2867 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2868
2869 av_push (av, waiter);
2870
2871 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2872 frame->prepare = prepare_schedule;
2873 frame->check = slf_check_signal_wait;
2874 }
2875}
2876
2877/*****************************************************************************/
2878/* Coro::AIO */
2879
2880#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2881
2882/* helper storage struct */
2883struct io_state
2884{
2885 int errorno;
2886 I32 laststype; /* U16 in 5.10.0 */
2887 int laststatval;
2888 Stat_t statcache;
2889};
2890
2891static void
2892coro_aio_callback (pTHX_ CV *cv)
2893{
2894 dXSARGS;
2895 AV *state = (AV *)S_GENSUB_ARG;
2896 SV *coro = av_pop (state);
2897 SV *data_sv = newSV (sizeof (struct io_state));
2898
2899 av_extend (state, items - 1);
2900
2901 sv_upgrade (data_sv, SVt_PV);
2902 SvCUR_set (data_sv, sizeof (struct io_state));
2903 SvPOK_only (data_sv);
2904
2905 {
2906 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2907
2908 data->errorno = errno;
2909 data->laststype = PL_laststype;
2910 data->laststatval = PL_laststatval;
2911 data->statcache = PL_statcache;
2912 }
2913
2914 /* now build the result vector out of all the parameters and the data_sv */
2915 {
2916 int i;
2917
2918 for (i = 0; i < items; ++i)
2919 av_push (state, SvREFCNT_inc_NN (ST (i)));
2920 }
2921
2922 av_push (state, data_sv);
2923
2924 api_ready (aTHX_ coro);
2925 SvREFCNT_dec (coro);
2926 SvREFCNT_dec ((AV *)state);
2927}
2928
2929static int
2930slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2931{
2932 AV *state = (AV *)frame->data;
2933
2934 /* if we are about to throw, return early */
2935 /* this does not cancel the aio request, but at least */
2936 /* it quickly returns */
2937 if (CORO_THROW)
2938 return 0;
2939
2940 /* one element that is an RV? repeat! */
2941 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2942 return 1;
2943
2944 /* restore status */
2945 {
2946 SV *data_sv = av_pop (state);
2947 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2948
2949 errno = data->errorno;
2950 PL_laststype = data->laststype;
2951 PL_laststatval = data->laststatval;
2952 PL_statcache = data->statcache;
2953
2954 SvREFCNT_dec (data_sv);
2955 }
2956
2957 /* push result values */
2958 {
2959 dSP;
2960 int i;
2961
2962 EXTEND (SP, AvFILLp (state) + 1);
2963 for (i = 0; i <= AvFILLp (state); ++i)
2964 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2965
2966 PUTBACK;
2967 }
2968
2969 return 0;
2970}
2971
2972static void
2973slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2974{
2975 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2976 SV *coro_hv = SvRV (coro_current);
2977 struct coro *coro = SvSTATE_hv (coro_hv);
2978
2979 /* put our coroutine id on the state arg */
2980 av_push (state, SvREFCNT_inc_NN (coro_hv));
2981
2982 /* first see whether we have a non-zero priority and set it as AIO prio */
2983 if (coro->prio)
2984 {
2985 dSP;
2986
2987 static SV *prio_cv;
2988 static SV *prio_sv;
2989
2990 if (expect_false (!prio_cv))
2991 {
2992 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2993 prio_sv = newSViv (0);
2994 }
2995
2996 PUSHMARK (SP);
2997 sv_setiv (prio_sv, coro->prio);
2998 XPUSHs (prio_sv);
2999
3000 PUTBACK;
3001 call_sv (prio_cv, G_VOID | G_DISCARD);
3002 }
3003
3004 /* now call the original request */
3005 {
3006 dSP;
3007 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3008 int i;
3009
3010 PUSHMARK (SP);
3011
3012 /* first push all args to the stack */
3013 EXTEND (SP, items + 1);
3014
3015 for (i = 0; i < items; ++i)
3016 PUSHs (arg [i]);
3017
3018 /* now push the callback closure */
3019 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3020
3021 /* now call the AIO function - we assume our request is uncancelable */
3022 PUTBACK;
3023 call_sv ((SV *)req, G_VOID | G_DISCARD);
3024 }
3025
3026 /* now that the request is going, we loop till we have a result */
3027 frame->data = (void *)state;
3028 frame->prepare = prepare_schedule;
3029 frame->check = slf_check_aio_req;
3030}
3031
3032static void
3033coro_aio_req_xs (pTHX_ CV *cv)
3034{
3035 dXSARGS;
3036
3037 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3038
3039 XSRETURN_EMPTY;
3040}
3041
3042/*****************************************************************************/
3043
3044#if CORO_CLONE
3045# include "clone.c"
3046#endif
3047
3048/*****************************************************************************/
3049
3050static SV *
3051coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3052{
3053 SV *coro_sv;
3054 struct coro *coro;
3055 MAGIC *mg;
3056 HV *hv;
3057 SV *cb;
3058 int i;
3059
3060 if (argc > 0)
3061 {
3062 cb = s_get_cv_croak (argv [0]);
3063
3064 if (!is_coro)
3065 {
3066 if (CvISXSUB (cb))
3067 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3068
3069 if (!CvROOT (cb))
3070 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3071 }
3072 }
3073
3074 Newz (0, coro, 1, struct coro);
3075 coro->args = newAV ();
3076 coro->flags = CF_NEW;
3077
3078 if (coro_first) coro_first->prev = coro;
3079 coro->next = coro_first;
3080 coro_first = coro;
3081
3082 coro->hv = hv = newHV ();
3083 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3084 mg->mg_flags |= MGf_DUP;
3085 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3086
3087 if (argc > 0)
3088 {
3089 av_extend (coro->args, argc + is_coro - 1);
3090
3091 if (is_coro)
3092 {
3093 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3094 cb = (SV *)cv_coro_run;
3095 }
3096
3097 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3098
3099 for (i = 1; i < argc; i++)
3100 av_push (coro->args, newSVsv (argv [i]));
3101 }
3102
3103 return coro_sv;
1370} 3104}
1371 3105
1372MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1373 3107
1374PROTOTYPES: DISABLE 3108PROTOTYPES: DISABLE
1375 3109
1376BOOT: 3110BOOT:
1377{ 3111{
1378#ifdef USE_ITHREADS 3112#ifdef USE_ITHREADS
1379 MUTEX_INIT (&coro_mutex); 3113# if CORO_PTHREAD
3114 coro_thx = PERL_GET_CONTEXT;
3115# endif
1380#endif 3116#endif
1381 BOOT_PAGESIZE; 3117 BOOT_PAGESIZE;
1382 3118
3119 cctx_current = cctx_new_empty ();
3120
1383 irsgv = gv_fetchpv ("/", 1, SVt_PV); 3121 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3122 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3123
3124 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3125 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3126 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3127
3128 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3129 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3130 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1384 3131
1385 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3132 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1386 3133
1387 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3134 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1388 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3135 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1393 main_top_env = PL_top_env; 3140 main_top_env = PL_top_env;
1394 3141
1395 while (main_top_env->je_prev) 3142 while (main_top_env->je_prev)
1396 main_top_env = main_top_env->je_prev; 3143 main_top_env = main_top_env->je_prev;
1397 3144
3145 {
3146 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3147
3148 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3149 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3150
3151 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3152 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3153 }
3154
1398 coroapi.ver = CORO_API_VERSION; 3155 coroapi.ver = CORO_API_VERSION;
3156 coroapi.rev = CORO_API_REVISION;
3157
1399 coroapi.transfer = api_transfer; 3158 coroapi.transfer = api_transfer;
1400 3159
3160 coroapi.sv_state = SvSTATE_;
3161 coroapi.execute_slf = api_execute_slf;
3162 coroapi.prepare_nop = prepare_nop;
3163 coroapi.prepare_schedule = prepare_schedule;
3164 coroapi.prepare_cede = prepare_cede;
3165 coroapi.prepare_cede_notself = prepare_cede_notself;
3166
3167 time_init (aTHX);
3168
1401 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3169 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1402} 3170}
1403 3171
1404SV * 3172SV *
1405new (char *klass, ...) 3173new (SV *klass, ...)
3174 ALIAS:
3175 Coro::new = 1
1406 CODE: 3176 CODE:
1407{ 3177 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1408 struct coro *coro; 3178 OUTPUT:
1409 HV *hv;
1410 int i;
1411
1412 Newz (0, coro, 1, struct coro);
1413 coro->args = newAV ();
1414 coro->flags = CF_NEW;
1415
1416 if (coro_first) coro_first->prev = coro;
1417 coro->next = coro_first;
1418 coro_first = coro;
1419
1420 coro->hv = hv = newHV ();
1421 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1422 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1423
1424 for (i = 1; i < items; i++)
1425 av_push (coro->args, newSVsv (ST (i)));
1426}
1427 OUTPUT:
1428 RETVAL 3179 RETVAL
1429 3180
1430# these not obviously related functions are all rolled into the same xs
1431# function to increase chances that they all will call transfer with the same
1432# stack offset
1433void 3181void
1434_set_stacklevel (...) 3182transfer (...)
1435 ALIAS: 3183 PROTOTYPE: $$
1436 Coro::State::transfer = 1 3184 CODE:
1437 Coro::schedule = 2 3185 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1438 Coro::cede = 3
1439 Coro::cede_notself = 4
1440 CODE:
1441{
1442 struct transfer_args ta;
1443
1444 switch (ix)
1445 {
1446 case 0:
1447 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1448 ta.next = 0;
1449 break;
1450
1451 case 1:
1452 if (items != 2)
1453 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1454
1455 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1456 break;
1457
1458 case 2:
1459 prepare_schedule (aTHX_ &ta);
1460 break;
1461
1462 case 3:
1463 prepare_cede (aTHX_ &ta);
1464 break;
1465
1466 case 4:
1467 if (!prepare_cede_notself (aTHX_ &ta))
1468 XSRETURN_EMPTY;
1469
1470 break;
1471 }
1472
1473 BARRIER;
1474 TRANSFER (ta);
1475
1476 if (GIMME_V != G_VOID && ta.next != ta.prev)
1477 XSRETURN_YES;
1478}
1479 3186
1480bool 3187bool
1481_destroy (SV *coro_sv) 3188_destroy (SV *coro_sv)
1482 CODE: 3189 CODE:
1483 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3190 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1484 OUTPUT: 3191 OUTPUT:
1485 RETVAL 3192 RETVAL
1486 3193
1487void 3194void
1488_exit (code) 3195_exit (int code)
1489 int code
1490 PROTOTYPE: $ 3196 PROTOTYPE: $
1491 CODE: 3197 CODE:
1492 _exit (code); 3198 _exit (code);
1493 3199
3200SV *
3201clone (Coro::State coro)
3202 CODE:
3203{
3204#if CORO_CLONE
3205 struct coro *ncoro = coro_clone (aTHX_ coro);
3206 MAGIC *mg;
3207 /* TODO: too much duplication */
3208 ncoro->hv = newHV ();
3209 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3210 mg->mg_flags |= MGf_DUP;
3211 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3212#else
3213 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3214#endif
3215}
3216 OUTPUT:
3217 RETVAL
3218
1494int 3219int
1495cctx_stacksize (int new_stacksize = 0) 3220cctx_stacksize (int new_stacksize = 0)
3221 PROTOTYPE: ;$
1496 CODE: 3222 CODE:
1497 RETVAL = coro_stacksize; 3223 RETVAL = cctx_stacksize;
1498 if (new_stacksize) 3224 if (new_stacksize)
3225 {
1499 coro_stacksize = new_stacksize; 3226 cctx_stacksize = new_stacksize;
3227 ++cctx_gen;
3228 }
1500 OUTPUT: 3229 OUTPUT:
1501 RETVAL 3230 RETVAL
1502 3231
1503int 3232int
3233cctx_max_idle (int max_idle = 0)
3234 PROTOTYPE: ;$
3235 CODE:
3236 RETVAL = cctx_max_idle;
3237 if (max_idle > 1)
3238 cctx_max_idle = max_idle;
3239 OUTPUT:
3240 RETVAL
3241
3242int
1504cctx_count () 3243cctx_count ()
3244 PROTOTYPE:
1505 CODE: 3245 CODE:
1506 RETVAL = cctx_count; 3246 RETVAL = cctx_count;
1507 OUTPUT: 3247 OUTPUT:
1508 RETVAL 3248 RETVAL
1509 3249
1510int 3250int
1511cctx_idle () 3251cctx_idle ()
3252 PROTOTYPE:
1512 CODE: 3253 CODE:
1513 RETVAL = cctx_idle; 3254 RETVAL = cctx_idle;
1514 OUTPUT: 3255 OUTPUT:
1515 RETVAL 3256 RETVAL
1516 3257
1517void 3258void
1518list () 3259list ()
3260 PROTOTYPE:
1519 PPCODE: 3261 PPCODE:
1520{ 3262{
1521 struct coro *coro; 3263 struct coro *coro;
1522 for (coro = coro_first; coro; coro = coro->next) 3264 for (coro = coro_first; coro; coro = coro->next)
1523 if (coro->hv) 3265 if (coro->hv)
… …
1528call (Coro::State coro, SV *coderef) 3270call (Coro::State coro, SV *coderef)
1529 ALIAS: 3271 ALIAS:
1530 eval = 1 3272 eval = 1
1531 CODE: 3273 CODE:
1532{ 3274{
1533 if (coro->mainstack) 3275 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1534 { 3276 {
1535 struct coro temp; 3277 struct coro *current = SvSTATE_current;
1536 Zero (&temp, 1, struct coro);
1537 3278
1538 if (!(coro->flags & CF_RUNNING)) 3279 if (current != coro)
1539 { 3280 {
3281 PUTBACK;
1540 save_perl (aTHX_ &temp); 3282 save_perl (aTHX_ current);
1541 load_perl (aTHX_ coro); 3283 load_perl (aTHX_ coro);
3284 SPAGAIN;
1542 } 3285 }
1543 3286
1544 { 3287 PUSHSTACK;
1545 dSP; 3288
1546 ENTER;
1547 SAVETMPS;
1548 PUSHMARK (SP); 3289 PUSHMARK (SP);
1549 PUTBACK; 3290 PUTBACK;
3291
1550 if (ix) 3292 if (ix)
1551 eval_sv (coderef, 0); 3293 eval_sv (coderef, 0);
1552 else 3294 else
1553 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3295 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3296
3297 POPSTACK;
1554 SPAGAIN; 3298 SPAGAIN;
1555 FREETMPS;
1556 LEAVE;
1557 PUTBACK;
1558 }
1559 3299
1560 if (!(coro->flags & CF_RUNNING)) 3300 if (current != coro)
1561 { 3301 {
3302 PUTBACK;
1562 save_perl (aTHX_ coro); 3303 save_perl (aTHX_ coro);
1563 load_perl (aTHX_ &temp); 3304 load_perl (aTHX_ current);
3305 SPAGAIN;
1564 } 3306 }
1565 } 3307 }
1566} 3308}
1567 3309
1568SV * 3310SV *
… …
1571 ALIAS: 3313 ALIAS:
1572 is_ready = CF_READY 3314 is_ready = CF_READY
1573 is_running = CF_RUNNING 3315 is_running = CF_RUNNING
1574 is_new = CF_NEW 3316 is_new = CF_NEW
1575 is_destroyed = CF_DESTROYED 3317 is_destroyed = CF_DESTROYED
3318 is_suspended = CF_SUSPENDED
1576 CODE: 3319 CODE:
1577 RETVAL = boolSV (coro->flags & ix); 3320 RETVAL = boolSV (coro->flags & ix);
1578 OUTPUT: 3321 OUTPUT:
1579 RETVAL 3322 RETVAL
1580 3323
1581void 3324void
3325throw (Coro::State self, SV *exception = &PL_sv_undef)
3326 PROTOTYPE: $;$
3327 CODE:
3328{
3329 struct coro *current = SvSTATE_current;
3330 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3331 SvREFCNT_dec (*exceptionp);
3332 SvGETMAGIC (exception);
3333 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3334}
3335
3336void
1582api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3337api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3338 PROTOTYPE: $;$
3339 C_ARGS: aTHX_ coro, flags
1583 3340
1584SV * 3341SV *
1585has_stack (Coro::State coro) 3342has_cctx (Coro::State coro)
1586 PROTOTYPE: $ 3343 PROTOTYPE: $
1587 CODE: 3344 CODE:
1588 RETVAL = boolSV (!!coro->cctx); 3345 /* maybe manage the running flag differently */
3346 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1589 OUTPUT: 3347 OUTPUT:
1590 RETVAL 3348 RETVAL
1591 3349
1592int 3350int
1593is_traced (Coro::State coro) 3351is_traced (Coro::State coro)
… …
1595 CODE: 3353 CODE:
1596 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3354 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1597 OUTPUT: 3355 OUTPUT:
1598 RETVAL 3356 RETVAL
1599 3357
1600IV 3358UV
1601rss (Coro::State coro) 3359rss (Coro::State coro)
1602 PROTOTYPE: $ 3360 PROTOTYPE: $
1603 ALIAS: 3361 ALIAS:
1604 usecount = 1 3362 usecount = 1
1605 CODE: 3363 CODE:
… …
1609 case 1: RETVAL = coro->usecount; break; 3367 case 1: RETVAL = coro->usecount; break;
1610 } 3368 }
1611 OUTPUT: 3369 OUTPUT:
1612 RETVAL 3370 RETVAL
1613 3371
3372void
3373force_cctx ()
3374 PROTOTYPE:
3375 CODE:
3376 cctx_current->idle_sp = 0;
3377
3378void
3379swap_defsv (Coro::State self)
3380 PROTOTYPE: $
3381 ALIAS:
3382 swap_defav = 1
3383 CODE:
3384 if (!self->slot)
3385 croak ("cannot swap state with coroutine that has no saved state,");
3386 else
3387 {
3388 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3389 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3390
3391 SV *tmp = *src; *src = *dst; *dst = tmp;
3392 }
3393
3394void
3395cancel (Coro::State self)
3396 CODE:
3397 coro_state_destroy (aTHX_ self);
3398 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3399
3400
3401SV *
3402enable_times (int enabled = enable_times)
3403 CODE:
3404{
3405 RETVAL = boolSV (enable_times);
3406
3407 if (enabled != enable_times)
3408 {
3409 enable_times = enabled;
3410
3411 coro_times_update ();
3412 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3413 }
3414}
3415 OUTPUT:
3416 RETVAL
3417
3418void
3419times (Coro::State self)
3420 PPCODE:
3421{
3422 struct coro *current = SvSTATE (coro_current);
3423
3424 if (expect_false (current == self))
3425 {
3426 coro_times_update ();
3427 coro_times_add (SvSTATE (coro_current));
3428 }
3429
3430 EXTEND (SP, 2);
3431 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3432 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3433
3434 if (expect_false (current == self))
3435 coro_times_sub (SvSTATE (coro_current));
3436}
3437
3438void
3439swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3440 CODE:
3441{
3442 struct coro *current = SvSTATE_current;
3443
3444 if (current == coro)
3445 SWAP_SVS (current);
3446
3447 if (!coro->swap_sv)
3448 coro->swap_sv = newAV ();
3449
3450 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3451 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3452
3453 if (current == coro)
3454 SWAP_SVS (current);
3455}
3456
1614 3457
1615MODULE = Coro::State PACKAGE = Coro 3458MODULE = Coro::State PACKAGE = Coro
1616 3459
1617BOOT: 3460BOOT:
1618{ 3461{
1619 int i;
1620
1621 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3462 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1622 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3463 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3464 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3465 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3466 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1623 av_async_pool = get_av ("Coro::async_pool", TRUE); 3467 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3468 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3469 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3470 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1624 3471
1625 coro_current = get_sv ("Coro::current", FALSE); 3472 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1626 SvREADONLY_on (coro_current); 3473 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1627 3474 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3475 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3476
1628 coro_stash = gv_stashpv ("Coro", TRUE); 3477 coro_stash = gv_stashpv ("Coro", TRUE);
1629 3478
1630 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3479 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1631 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3480 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1632 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3481 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1633 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3482 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1634 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3483 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1635 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3484 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1636
1637 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1638 coro_ready[i] = newAV ();
1639 3485
1640 { 3486 {
1641 SV *sv = perl_get_sv("Coro::API", 1); 3487 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1642 3488
1643 coroapi.schedule = api_schedule; 3489 coroapi.schedule = api_schedule;
3490 coroapi.schedule_to = api_schedule_to;
1644 coroapi.cede = api_cede; 3491 coroapi.cede = api_cede;
1645 coroapi.cede_notself = api_cede_notself; 3492 coroapi.cede_notself = api_cede_notself;
1646 coroapi.ready = api_ready; 3493 coroapi.ready = api_ready;
1647 coroapi.is_ready = api_is_ready; 3494 coroapi.is_ready = api_is_ready;
1648 coroapi.nready = &coro_nready; 3495 coroapi.nready = coro_nready;
1649 coroapi.current = coro_current; 3496 coroapi.current = coro_current;
1650 3497
1651 GCoroAPI = &coroapi; 3498 /*GCoroAPI = &coroapi;*/
1652 sv_setiv (sv, (IV)&coroapi); 3499 sv_setiv (sv, (IV)&coroapi);
1653 SvREADONLY_on (sv); 3500 SvREADONLY_on (sv);
1654 } 3501 }
1655} 3502}
3503
3504SV *
3505async (...)
3506 PROTOTYPE: &@
3507 CODE:
3508 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3509 api_ready (aTHX_ RETVAL);
3510 OUTPUT:
3511 RETVAL
3512
3513void
3514terminate (...)
3515 CODE:
3516 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3517
3518void
3519schedule (...)
3520 CODE:
3521 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3522
3523void
3524schedule_to (...)
3525 CODE:
3526 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3527
3528void
3529cede_to (...)
3530 CODE:
3531 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3532
3533void
3534cede (...)
3535 CODE:
3536 CORO_EXECUTE_SLF_XS (slf_init_cede);
3537
3538void
3539cede_notself (...)
3540 CODE:
3541 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1656 3542
1657void 3543void
1658_set_current (SV *current) 3544_set_current (SV *current)
1659 PROTOTYPE: $ 3545 PROTOTYPE: $
1660 CODE: 3546 CODE:
1661 SvREFCNT_dec (SvRV (coro_current)); 3547 SvREFCNT_dec (SvRV (coro_current));
1662 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3548 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3549
3550void
3551_set_readyhook (SV *hook)
3552 PROTOTYPE: $
3553 CODE:
3554 SvREFCNT_dec (coro_readyhook);
3555 SvGETMAGIC (hook);
3556 if (SvOK (hook))
3557 {
3558 coro_readyhook = newSVsv (hook);
3559 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3560 }
3561 else
3562 {
3563 coro_readyhook = 0;
3564 CORO_READYHOOK = 0;
3565 }
1663 3566
1664int 3567int
1665prio (Coro::State coro, int newprio = 0) 3568prio (Coro::State coro, int newprio = 0)
3569 PROTOTYPE: $;$
1666 ALIAS: 3570 ALIAS:
1667 nice = 1 3571 nice = 1
1668 CODE: 3572 CODE:
1669{ 3573{
1670 RETVAL = coro->prio; 3574 RETVAL = coro->prio;
… …
1672 if (items > 1) 3576 if (items > 1)
1673 { 3577 {
1674 if (ix) 3578 if (ix)
1675 newprio = coro->prio - newprio; 3579 newprio = coro->prio - newprio;
1676 3580
1677 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3581 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1678 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3582 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1679 3583
1680 coro->prio = newprio; 3584 coro->prio = newprio;
1681 } 3585 }
1682} 3586}
1683 OUTPUT: 3587 OUTPUT:
… …
1685 3589
1686SV * 3590SV *
1687ready (SV *self) 3591ready (SV *self)
1688 PROTOTYPE: $ 3592 PROTOTYPE: $
1689 CODE: 3593 CODE:
1690 RETVAL = boolSV (api_ready (self)); 3594 RETVAL = boolSV (api_ready (aTHX_ self));
1691 OUTPUT: 3595 OUTPUT:
1692 RETVAL 3596 RETVAL
1693 3597
1694int 3598int
1695nready (...) 3599nready (...)
… …
1697 CODE: 3601 CODE:
1698 RETVAL = coro_nready; 3602 RETVAL = coro_nready;
1699 OUTPUT: 3603 OUTPUT:
1700 RETVAL 3604 RETVAL
1701 3605
1702# for async_pool speedup
1703void 3606void
1704_pool_1 (SV *cb) 3607suspend (Coro::State self)
3608 PROTOTYPE: $
1705 CODE: 3609 CODE:
1706{ 3610 self->flags |= CF_SUSPENDED;
1707 struct coro *coro = SvSTATE (coro_current);
1708 HV *hv = (HV *)SvRV (coro_current);
1709 AV *defav = GvAV (PL_defgv);
1710 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1711 AV *invoke_av;
1712 int i, len;
1713 3611
1714 if (!invoke) 3612void
1715 croak ("\3terminate\2\n"); 3613resume (Coro::State self)
3614 PROTOTYPE: $
3615 CODE:
3616 self->flags &= ~CF_SUSPENDED;
1716 3617
1717 SvREFCNT_dec (coro->saved_deffh); 3618void
1718 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3619_pool_handler (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1719 3622
1720 hv_store (hv, "desc", sizeof ("desc") - 1, 3623void
1721 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3624async_pool (SV *cv, ...)
3625 PROTOTYPE: &@
3626 PPCODE:
3627{
3628 HV *hv = (HV *)av_pop (av_async_pool);
3629 AV *av = newAV ();
3630 SV *cb = ST (0);
3631 int i;
1722 3632
1723 invoke_av = (AV *)SvRV (invoke); 3633 av_extend (av, items - 2);
1724 len = av_len (invoke_av); 3634 for (i = 1; i < items; ++i)
3635 av_push (av, SvREFCNT_inc_NN (ST (i)));
1725 3636
1726 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3637 if ((SV *)hv == &PL_sv_undef)
1727
1728 if (len > 0)
1729 { 3638 {
1730 av_fill (defav, len - 1); 3639 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1731 for (i = 0; i < len; ++i) 3640 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1732 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3641 SvREFCNT_dec (sv);
1733 } 3642 }
1734 3643
3644 {
3645 struct coro *coro = SvSTATE_hv (hv);
3646
3647 assert (!coro->invoke_cb);
3648 assert (!coro->invoke_av);
3649 coro->invoke_cb = SvREFCNT_inc (cb);
3650 coro->invoke_av = av;
3651 }
3652
3653 api_ready (aTHX_ (SV *)hv);
3654
3655 if (GIMME_V != G_VOID)
3656 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3657 else
1735 SvREFCNT_dec (invoke); 3658 SvREFCNT_dec (hv);
1736} 3659}
1737 3660
1738void 3661SV *
1739_pool_2 (SV *cb) 3662rouse_cb ()
3663 PROTOTYPE:
1740 CODE: 3664 CODE:
1741{ 3665 RETVAL = coro_new_rouse_cb (aTHX);
1742 struct coro *coro = SvSTATE (coro_current);
1743
1744 sv_setsv (cb, &PL_sv_undef);
1745
1746 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1747 coro->saved_deffh = 0;
1748
1749 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1750 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1751 croak ("\3terminate\2\n");
1752
1753 av_clear (GvAV (PL_defgv));
1754 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1755 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1756
1757 coro->prio = 0;
1758
1759 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1760 api_trace (coro_current, 0);
1761
1762 av_push (av_async_pool, newSVsv (coro_current));
1763}
1764
1765
1766MODULE = Coro::State PACKAGE = Coro::AIO
1767
1768SV *
1769_get_state ()
1770 CODE:
1771{
1772 struct io_state *data;
1773
1774 RETVAL = newSV (sizeof (struct io_state));
1775 data = (struct io_state *)SvPVX (RETVAL);
1776 SvCUR_set (RETVAL, sizeof (struct io_state));
1777 SvPOK_only (RETVAL);
1778
1779 data->errorno = errno;
1780 data->laststype = PL_laststype;
1781 data->laststatval = PL_laststatval;
1782 data->statcache = PL_statcache;
1783}
1784 OUTPUT: 3666 OUTPUT:
1785 RETVAL 3667 RETVAL
1786 3668
1787void 3669void
1788_set_state (char *data_) 3670rouse_wait (...)
3671 PROTOTYPE: ;$
3672 PPCODE:
3673 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3674
3675void
3676on_enter (SV *block)
3677 ALIAS:
3678 on_leave = 1
1789 PROTOTYPE: $ 3679 PROTOTYPE: &
1790 CODE: 3680 CODE:
1791{ 3681{
1792 struct io_state *data = (void *)data_; 3682 struct coro *coro = SvSTATE_current;
3683 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1793 3684
1794 errno = data->errorno; 3685 block = s_get_cv_croak (block);
1795 PL_laststype = data->laststype;
1796 PL_laststatval = data->laststatval;
1797 PL_statcache = data->statcache;
1798}
1799 3686
3687 if (!*avp)
3688 *avp = newAV ();
3689
3690 av_push (*avp, SvREFCNT_inc (block));
3691
3692 if (!ix)
3693 on_enterleave_call (aTHX_ block);
3694
3695 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3696 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3697 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3698}
3699
3700
3701MODULE = Coro::State PACKAGE = PerlIO::cede
3702
3703BOOT:
3704 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3705
3706
3707MODULE = Coro::State PACKAGE = Coro::Semaphore
3708
3709SV *
3710new (SV *klass, SV *count = 0)
3711 CODE:
3712{
3713 int semcnt = 1;
3714
3715 if (count)
3716 {
3717 SvGETMAGIC (count);
3718
3719 if (SvOK (count))
3720 semcnt = SvIV (count);
3721 }
3722
3723 RETVAL = sv_bless (
3724 coro_waitarray_new (aTHX_ semcnt),
3725 GvSTASH (CvGV (cv))
3726 );
3727}
3728 OUTPUT:
3729 RETVAL
3730
3731# helper for Coro::Channel and others
3732SV *
3733_alloc (int count)
3734 CODE:
3735 RETVAL = coro_waitarray_new (aTHX_ count);
3736 OUTPUT:
3737 RETVAL
3738
3739SV *
3740count (SV *self)
3741 CODE:
3742 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3743 OUTPUT:
3744 RETVAL
3745
3746void
3747up (SV *self, int adjust = 1)
3748 ALIAS:
3749 adjust = 1
3750 CODE:
3751 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3752
3753void
3754down (...)
3755 CODE:
3756 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3757
3758void
3759wait (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3762
3763void
3764try (SV *self)
3765 PPCODE:
3766{
3767 AV *av = (AV *)SvRV (self);
3768 SV *count_sv = AvARRAY (av)[0];
3769 IV count = SvIVX (count_sv);
3770
3771 if (count > 0)
3772 {
3773 --count;
3774 SvIVX (count_sv) = count;
3775 XSRETURN_YES;
3776 }
3777 else
3778 XSRETURN_NO;
3779}
3780
3781void
3782waiters (SV *self)
3783 PPCODE:
3784{
3785 AV *av = (AV *)SvRV (self);
3786 int wcount = AvFILLp (av) + 1 - 1;
3787
3788 if (GIMME_V == G_SCALAR)
3789 XPUSHs (sv_2mortal (newSViv (wcount)));
3790 else
3791 {
3792 int i;
3793 EXTEND (SP, wcount);
3794 for (i = 1; i <= wcount; ++i)
3795 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3796 }
3797}
3798
3799MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3800
3801void
3802_may_delete (SV *sem, int count, int extra_refs)
3803 PPCODE:
3804{
3805 AV *av = (AV *)SvRV (sem);
3806
3807 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3808 && AvFILLp (av) == 0 /* no waiters, just count */
3809 && SvIV (AvARRAY (av)[0]) == count)
3810 XSRETURN_YES;
3811
3812 XSRETURN_NO;
3813}
3814
3815MODULE = Coro::State PACKAGE = Coro::Signal
3816
3817SV *
3818new (SV *klass)
3819 CODE:
3820 RETVAL = sv_bless (
3821 coro_waitarray_new (aTHX_ 0),
3822 GvSTASH (CvGV (cv))
3823 );
3824 OUTPUT:
3825 RETVAL
3826
3827void
3828wait (...)
3829 CODE:
3830 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3831
3832void
3833broadcast (SV *self)
3834 CODE:
3835{
3836 AV *av = (AV *)SvRV (self);
3837 coro_signal_wake (aTHX_ av, AvFILLp (av));
3838}
3839
3840void
3841send (SV *self)
3842 CODE:
3843{
3844 AV *av = (AV *)SvRV (self);
3845
3846 if (AvFILLp (av))
3847 coro_signal_wake (aTHX_ av, 1);
3848 else
3849 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3850}
3851
3852IV
3853awaited (SV *self)
3854 CODE:
3855 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3856 OUTPUT:
3857 RETVAL
3858
3859
3860MODULE = Coro::State PACKAGE = Coro::AnyEvent
3861
3862BOOT:
3863 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3864
3865void
3866_schedule (...)
3867 CODE:
3868{
3869 static int incede;
3870
3871 api_cede_notself (aTHX);
3872
3873 ++incede;
3874 while (coro_nready >= incede && api_cede (aTHX))
3875 ;
3876
3877 sv_setsv (sv_activity, &PL_sv_undef);
3878 if (coro_nready >= incede)
3879 {
3880 PUSHMARK (SP);
3881 PUTBACK;
3882 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3883 }
3884
3885 --incede;
3886}
3887
3888
3889MODULE = Coro::State PACKAGE = Coro::AIO
3890
3891void
3892_register (char *target, char *proto, SV *req)
3893 CODE:
3894{
3895 SV *req_cv = s_get_cv_croak (req);
3896 /* newXSproto doesn't return the CV on 5.8 */
3897 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3898 sv_setpv ((SV *)slf_cv, proto);
3899 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3900}
3901
3902MODULE = Coro::State PACKAGE = Coro::Select
3903
3904void
3905patch_pp_sselect ()
3906 CODE:
3907 if (!coro_old_pp_sselect)
3908 {
3909 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3910 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3911 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3912 }
3913
3914void
3915unpatch_pp_sselect ()
3916 CODE:
3917 if (coro_old_pp_sselect)
3918 {
3919 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3920 coro_old_pp_sselect = 0;
3921 }
3922

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