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Comparing Coro/Coro/State.xs (file contents):
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC vs.
Revision 1.381 by root, Sat Oct 23 09:28:50 2010 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 setjmp
28# undef longjmp
29# undef _exit
30# define setjmp _setjmp /* deep magic */
31#else
32# include <inttypes.h> /* most portable stdint.h */
33#endif
14 34
15#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
16# include <unistd.h> 36# include <unistd.h>
17# include <sys/mman.h> 37# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 38# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 55# define BOOT_PAGESIZE (void)0
36#endif 56#endif
37 57
38#if CORO_USE_VALGRIND 58#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 59# 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 60#endif
44 61
45/* the maximum number of idle cctx that will be pooled */ 62/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 63static 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 64
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 66# undef CORO_STACKGUARD
82#endif 67#endif
83 68
… …
88/* prefer perl internal functions over our own? */ 73/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 74#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 75# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 76#endif
92 77
93/* The next macro should declare a variable stacklevel that contains and approximation 78/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 79 * portable way as possible. */
95 * and should be unique. */ 80#if __GNUC__ >= 4
96#define dSTACKLEVEL int stacklevel 81# define dSTACKLEVEL int stacklevel_dummy
82# define STACKLEVEL __builtin_frame_address (0)
83#else
84# define dSTACKLEVEL volatile void *stacklevel
97#define STACKLEVEL ((void *)&stacklevel) 85# define STACKLEVEL ((void *)&stacklevel)
86#endif
98 87
99#define IN_DESTRUCT (PL_main_cv == Nullcv) 88#define IN_DESTRUCT PL_dirty
100 89
101#if __GNUC__ >= 3 90#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x) 91# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 92# define expect(expr,value) __builtin_expect ((expr), (value))
93# define INLINE static inline
104#else 94#else
105# define attribute(x) 95# define attribute(x)
106# define BARRIER 96# define expect(expr,value) (expr)
97# define INLINE static
107#endif 98#endif
108 99
100#define expect_false(expr) expect ((expr) != 0, 0)
101#define expect_true(expr) expect ((expr) != 0, 1)
102
109#define NOINLINE attribute ((noinline)) 103#define NOINLINE attribute ((noinline))
110 104
111#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
112 107
113#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 109# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 110static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 111# endif
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 112#endif
121 113
122/* helper storage struct for Coro::AIO */ 114#ifdef __linux
123struct io_state 115# include <time.h> /* for timespec */
124{ 116# include <syscall.h> /* for SYS_* */
125 int errorno; 117# ifdef SYS_clock_gettime
126 I32 laststype; 118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
127 int laststatval; 119# define CORO_CLOCK_MONOTONIC 1
128 Stat_t statcache; 120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
129}; 121# endif
122#endif
130 123
124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
130
131static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 132static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 135static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 136static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
138
139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
142
143static GV *irsgv; /* $/ */
144static GV *stdoutgv; /* *STDOUT */
145static SV *rv_diehook;
146static SV *rv_warnhook;
147static HV *hv_sig; /* %SIG */
148
149/* async_pool helper stuff */
150static SV *sv_pool_rss;
151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
156
157/* Coro::AnyEvent */
158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
137 165
138static struct coro_cctx *cctx_first; 166static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 167static int cctx_count, cctx_idle;
140 168
169enum {
170 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176};
177
141/* this is a structure representing a c-level coroutine */ 178/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 179typedef struct coro_cctx
180{
143 struct coro_cctx *next; 181 struct coro_cctx *next;
144 182
145 /* the stack */ 183 /* the stack */
146 void *sptr; 184 void *sptr;
147 size_t ssize; 185 size_t ssize;
… …
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 188 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 189 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
152 JMPENV *top_env; 190 JMPENV *top_env;
153 coro_context cctx; 191 coro_context cctx;
154 192
193 U32 gen;
155#if CORO_USE_VALGRIND 194#if CORO_USE_VALGRIND
156 int valgrind_id; 195 int valgrind_id;
157#endif 196#endif
158 char inuse, mapped; 197 unsigned char flags;
159} coro_cctx; 198} coro_cctx;
199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
160 203
161enum { 204enum {
162 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
166}; 210};
167 211
168/* this is a structure representing a perl-level coroutine */ 212/* the structure where most of the perl state is stored, overlaid on the cxstack */
169struct coro { 213typedef struct
170 /* the c coroutine allocated to this perl coroutine, if any */ 214{
171 coro_cctx *cctx; 215 SV *defsv;
172 216 AV *defav;
173 /* data associated with this coroutine (initial args) */ 217 SV *errsv;
174 AV *args; 218 SV *irsgv;
175 int refcnt; 219 HV *hinthv;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */
178
179 /* optionally saved, might be zero */
180 AV *defav; /* @_ */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name; 220#define VAR(name,type) type name;
188# include "state.h" 221# include "state.h"
189#undef VAR 222#undef VAR
223} perl_slots;
224
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
226
227/* this is a structure representing a perl-level coroutine */
228struct coro {
229 /* the C coroutine allocated to this perl coroutine, if any */
230 coro_cctx *cctx;
231
232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
236 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */
239
240 CV *startcv; /* the CV to execute */
241 AV *args; /* data associated with this coroutine (initial args) */
242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro);
246
247 /* statistics */
248 int usecount; /* number of transfers to this coro */
190 249
191 /* coro process data */ 250 /* coro process data */
192 int prio; 251 int prio;
252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
193 269
194 /* linked list */ 270 /* linked list */
195 struct coro *next, *prev; 271 struct coro *next, *prev;
196 HV *hv; /* the perl hash associated with this coro, if any */
197}; 272};
198 273
199typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
200typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
201 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
202/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
203 283
204#define PRIO_MAX 3 284#define CORO_PRIO_MAX 3
205#define PRIO_HIGH 1 285#define CORO_PRIO_HIGH 1
206#define PRIO_NORMAL 0 286#define CORO_PRIO_NORMAL 0
207#define PRIO_LOW -1 287#define CORO_PRIO_LOW -1
208#define PRIO_IDLE -3 288#define CORO_PRIO_IDLE -3
209#define PRIO_MIN -4 289#define CORO_PRIO_MIN -4
210 290
211/* for Coro.pm */ 291/* for Coro.pm */
212static SV *coro_current; 292static SV *coro_current;
213static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static SV *coro_readyhook;
214static int coro_nready; 294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
215static struct coro *first; 296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
307{
308 dSP;
309 PUSHMARK (SP - 4); /* fake argument list */
310 XPUSHs (coro_select_select);
311 PUTBACK;
312
313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
314 PL_op->op_flags |= OPf_STACKED;
315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
216 318
217/** lowlevel stuff **********************************************************/ 319/** lowlevel stuff **********************************************************/
218 320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
323{
324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
330
219static AV * 331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351INLINE void
352coro_times_update ()
353{
354#ifdef coro_clock_gettime
355 struct timespec ts;
356
357 ts.tv_sec = ts.tv_nsec = 0;
358 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
359 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
360
361 ts.tv_sec = ts.tv_nsec = 0;
362 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
363 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
364#else
365 dTHX;
366 UV tv[2];
367
368 u2time (aTHX_ tv);
369 time_real [0] = tv [0];
370 time_real [1] = tv [1] * 1000;
371#endif
372}
373
374INLINE void
375coro_times_add (struct coro *c)
376{
377 c->t_real [1] += time_real [1];
378 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
379 c->t_real [0] += time_real [0];
380
381 c->t_cpu [1] += time_cpu [1];
382 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
383 c->t_cpu [0] += time_cpu [0];
384}
385
386INLINE void
387coro_times_sub (struct coro *c)
388{
389 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
390 c->t_real [1] -= time_real [1];
391 c->t_real [0] -= time_real [0];
392
393 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
394 c->t_cpu [1] -= time_cpu [1];
395 c->t_cpu [0] -= time_cpu [0];
396}
397
398/*****************************************************************************/
399/* magic glue */
400
401#define CORO_MAGIC_type_cv 26
402#define CORO_MAGIC_type_state PERL_MAGIC_ext
403
404#define CORO_MAGIC_NN(sv, type) \
405 (expect_true (SvMAGIC (sv)->mg_type == type) \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type))
408
409#define CORO_MAGIC(sv, type) \
410 (expect_true (SvMAGIC (sv)) \
411 ? CORO_MAGIC_NN (sv, type) \
412 : 0)
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442
443/* faster than SvSTATE, but expects a coroutine hv */
444#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
445#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
446
447/*****************************************************************************/
448/* padlist management and caching */
449
450static AV *
220coro_clone_padlist (pTHX_ CV *cv) 451coro_derive_padlist (pTHX_ CV *cv)
221{ 452{
222 AV *padlist = CvPADLIST (cv); 453 AV *padlist = CvPADLIST (cv);
223 AV *newpadlist, *newpad; 454 AV *newpadlist, *newpad;
224 455
225 newpadlist = newAV (); 456 newpadlist = newAV ();
226 AvREAL_off (newpadlist); 457 AvREAL_off (newpadlist);
227#if PERL_VERSION_ATLEAST (5,9,0) 458#if PERL_VERSION_ATLEAST (5,10,0)
228 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 459 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
229#else 460#else
230 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 461 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
231#endif 462#endif
232 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 463 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
233 --AvFILLp (padlist); 464 --AvFILLp (padlist);
234 465
235 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 466 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
236 av_store (newpadlist, 1, (SV *)newpad); 467 av_store (newpadlist, 1, (SV *)newpad);
237 468
238 return newpadlist; 469 return newpadlist;
239} 470}
240 471
241static void 472static void
242free_padlist (pTHX_ AV *padlist) 473free_padlist (pTHX_ AV *padlist)
243{ 474{
244 /* may be during global destruction */ 475 /* may be during global destruction */
245 if (SvREFCNT (padlist)) 476 if (!IN_DESTRUCT)
246 { 477 {
247 I32 i = AvFILLp (padlist); 478 I32 i = AvFILLp (padlist);
248 while (i >= 0) 479
480 while (i > 0) /* special-case index 0 */
249 { 481 {
250 SV **svp = av_fetch (padlist, i--, FALSE); 482 /* we try to be extra-careful here */
251 if (svp) 483 AV *av = (AV *)AvARRAY (padlist)[i--];
252 { 484 I32 j = AvFILLp (av);
253 SV *sv; 485
254 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 486 while (j >= 0)
487 SvREFCNT_dec (AvARRAY (av)[j--]);
488
489 AvFILLp (av) = -1;
255 SvREFCNT_dec (sv); 490 SvREFCNT_dec (av);
256
257 SvREFCNT_dec (*svp);
258 }
259 } 491 }
260 492
493 SvREFCNT_dec (AvARRAY (padlist)[0]);
494
495 AvFILLp (padlist) = -1;
261 SvREFCNT_dec ((SV*)padlist); 496 SvREFCNT_dec ((SV*)padlist);
262 } 497 }
263} 498}
264 499
265static int 500static int
266coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 501coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267{ 502{
268 AV *padlist; 503 AV *padlist;
269 AV *av = (AV *)mg->mg_obj; 504 AV *av = (AV *)mg->mg_obj;
505
506 /* perl manages to free our internal AV and _then_ call us */
507 if (IN_DESTRUCT)
508 return 0;
270 509
271 /* casting is fun. */ 510 /* casting is fun. */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 511 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273 free_padlist (aTHX_ padlist); 512 free_padlist (aTHX_ padlist);
274 513
275 SvREFCNT_dec (av); 514 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
276 515
277 return 0; 516 return 0;
278} 517}
279 518
280#define PERL_MAGIC_coro PERL_MAGIC_ext 519static MGVTBL coro_cv_vtbl = {
281 520 0, 0, 0, 0,
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 521 coro_cv_free
283 522};
284#define CORO_MAGIC(cv) \
285 SvMAGIC (cv) \
286 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
287 ? SvMAGIC (cv) \
288 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
289 : 0
290 523
291/* the next two functions merely cache the padlists */ 524/* the next two functions merely cache the padlists */
292static void 525static void
293get_padlist (pTHX_ CV *cv) 526get_padlist (pTHX_ CV *cv)
294{ 527{
295 MAGIC *mg = CORO_MAGIC (cv); 528 MAGIC *mg = CORO_MAGIC_cv (cv);
296 AV *av; 529 AV *av;
297 530
298 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 531 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
299 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 532 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
300 else 533 else
301 { 534 {
302#if CORO_PREFER_PERL_FUNCTIONS 535#if CORO_PREFER_PERL_FUNCTIONS
303 /* this is probably cleaner, but also slower? */ 536 /* this is probably cleaner? but also slower! */
537 /* in practise, it seems to be less stable */
304 CV *cp = Perl_cv_clone (cv); 538 CV *cp = Perl_cv_clone (aTHX_ cv);
305 CvPADLIST (cv) = CvPADLIST (cp); 539 CvPADLIST (cv) = CvPADLIST (cp);
306 CvPADLIST (cp) = 0; 540 CvPADLIST (cp) = 0;
307 SvREFCNT_dec (cp); 541 SvREFCNT_dec (cp);
308#else 542#else
309 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 543 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
310#endif 544#endif
311 } 545 }
312} 546}
313 547
314static void 548static void
315put_padlist (pTHX_ CV *cv) 549put_padlist (pTHX_ CV *cv)
316{ 550{
317 MAGIC *mg = CORO_MAGIC (cv); 551 MAGIC *mg = CORO_MAGIC_cv (cv);
318 AV *av; 552 AV *av;
319 553
320 if (!mg) 554 if (expect_false (!mg))
321 { 555 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
322 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
323 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
324 mg->mg_virtual = &vtbl_coro;
325 mg->mg_obj = (SV *)newAV ();
326 }
327 556
328 av = (AV *)mg->mg_obj; 557 av = (AV *)mg->mg_obj;
329 558
330 if (AvFILLp (av) >= AvMAX (av)) 559 if (expect_false (AvFILLp (av) >= AvMAX (av)))
331 av_extend (av, AvMAX (av) + 1); 560 av_extend (av, AvFILLp (av) + 1);
332 561
333 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 562 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
334} 563}
335 564
336/** load & save, init *******************************************************/ 565/** load & save, init *******************************************************/
337 566
338#define SB do { 567/* swap sv heads, at least logically */
339#define SE } while (0) 568static void
569swap_svs (pTHX_ Coro__State c)
570{
571 int i;
340 572
341#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 573 for (i = 0; i <= AvFILLp (c->swap_sv); )
574 {
575 SV *a = AvARRAY (c->swap_sv)[i++];
576 SV *b = AvARRAY (c->swap_sv)[i++];
577
578 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
579 SV tmp;
580
581 /* swap sv_any */
582 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
583
584 /* swap sv_flags */
585 SvFLAGS (&tmp) = SvFLAGS (a);
586 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
587 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
588
589#if PERL_VERSION_ATLEAST (5,10,0)
590 /* perl 5.10 complicates this _quite_ a bit, but it also is
591 * is much faster, so no quarrels here. alternatively, we could
592 * sv_upgrade to avoid this.
593 */
594 {
595 /* swap sv_u */
596 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
597
598 /* if SvANY points to the head, we need to adjust the pointers,
599 * as the pointer for a still points to b, and maybe vice versa.
600 */
601 #define svany_in_head(type) \
602 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
603
604 if (svany_in_head (SvTYPE (a)))
605 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
606
607 if (svany_in_head (SvTYPE (b)))
608 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
609 }
610#endif
611 }
612}
613
614#define SWAP_SVS(coro) \
615 if (expect_false ((coro)->swap_sv)) \
616 swap_svs (aTHX_ (coro))
617
618static void
619on_enterleave_call (pTHX_ SV *cb);
342 620
343static void 621static void
344load_perl (pTHX_ Coro__State c) 622load_perl (pTHX_ Coro__State c)
345{ 623{
624 perl_slots *slot = c->slot;
625 c->slot = 0;
626
627 PL_mainstack = c->mainstack;
628
629 GvSV (PL_defgv) = slot->defsv;
630 GvAV (PL_defgv) = slot->defav;
631 GvSV (PL_errgv) = slot->errsv;
632 GvSV (irsgv) = slot->irsgv;
633 GvHV (PL_hintgv) = slot->hinthv;
634
346#define VAR(name,type) PL_ ## name = c->name; 635 #define VAR(name,type) PL_ ## name = slot->name;
347# include "state.h" 636 # include "state.h"
348#undef VAR 637 #undef VAR
349
350 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
354
355 if (c->irssv)
356 {
357 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
358 {
359 SvREFCNT_dec (c->irssv);
360 c->irssv = 0;
361 }
362 else
363 {
364 REPLACE_SV (PL_rs, c->irssv);
365 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
366 sv_setsv (c->irssv_sv, PL_rs);
367 }
368 }
369 638
370 { 639 {
371 dSP; 640 dSP;
641
372 CV *cv; 642 CV *cv;
373 643
374 /* now do the ugly restore mess */ 644 /* now do the ugly restore mess */
375 while ((cv = (CV *)POPs)) 645 while (expect_true (cv = (CV *)POPs))
376 { 646 {
377 put_padlist (aTHX_ cv); /* mark this padlist as available */ 647 put_padlist (aTHX_ cv); /* mark this padlist as available */
378 CvDEPTH (cv) = PTR2IV (POPs); 648 CvDEPTH (cv) = PTR2IV (POPs);
379 CvPADLIST (cv) = (AV *)POPs; 649 CvPADLIST (cv) = (AV *)POPs;
380 } 650 }
381 651
382 PUTBACK; 652 PUTBACK;
383 } 653 }
654
655 slf_frame = c->slf_frame;
656 CORO_THROW = c->except;
657
658 if (expect_false (enable_times))
659 {
660 if (expect_false (!times_valid))
661 coro_times_update ();
662
663 coro_times_sub (c);
664 }
665
666 if (expect_false (c->on_enter))
667 {
668 int i;
669
670 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
671 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
672 }
673
674 SWAP_SVS (c);
384} 675}
385 676
386static void 677static void
387save_perl (pTHX_ Coro__State c) 678save_perl (pTHX_ Coro__State c)
388{ 679{
680 SWAP_SVS (c);
681
682 if (expect_false (c->on_leave))
683 {
684 int i;
685
686 for (i = AvFILLp (c->on_leave); i >= 0; --i)
687 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
688 }
689
690 times_valid = 0;
691
692 if (expect_false (enable_times))
693 {
694 coro_times_update (); times_valid = 1;
695 coro_times_add (c);
696 }
697
698 c->except = CORO_THROW;
699 c->slf_frame = slf_frame;
700
389 { 701 {
390 dSP; 702 dSP;
391 I32 cxix = cxstack_ix; 703 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 704 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 705 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 707 /*
396 * the worst thing you can imagine happens first - we have to save 708 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 709 * (and reinitialize) all cv's in the whole callchain :(
398 */ 710 */
399 711
400 EXTEND (SP, 3 + 1);
401 PUSHs (Nullsv); 712 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 713 /* this loop was inspired by pp_caller */
403 for (;;) 714 for (;;)
404 { 715 {
405 while (cxix >= 0) 716 while (expect_true (cxix >= 0))
406 { 717 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 718 PERL_CONTEXT *cx = &ccstk[cxix--];
408 719
409 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 720 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
410 { 721 {
411 CV *cv = cx->blk_sub.cv; 722 CV *cv = cx->blk_sub.cv;
412 723
413 if (CvDEPTH (cv)) 724 if (expect_true (CvDEPTH (cv)))
414 { 725 {
415 EXTEND (SP, 3); 726 EXTEND (SP, 3);
416 PUSHs ((SV *)CvPADLIST (cv)); 727 PUSHs ((SV *)CvPADLIST (cv));
417 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 728 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 729 PUSHs ((SV *)cv);
419 730
420 CvDEPTH (cv) = 0; 731 CvDEPTH (cv) = 0;
421 get_padlist (aTHX_ cv); 732 get_padlist (aTHX_ cv);
422 } 733 }
423 } 734 }
424 } 735 }
425 736
426 if (top_si->si_type == PERLSI_MAIN) 737 if (expect_true (top_si->si_type == PERLSI_MAIN))
427 break; 738 break;
428 739
429 top_si = top_si->si_prev; 740 top_si = top_si->si_prev;
430 ccstk = top_si->si_cxstack; 741 ccstk = top_si->si_cxstack;
431 cxix = top_si->si_cxix; 742 cxix = top_si->si_cxix;
432 } 743 }
433 744
434 PUTBACK; 745 PUTBACK;
435 } 746 }
436 747
437 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 748 /* allocate some space on the context stack for our purposes */
438 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 749 /* we manually unroll here, as usually 2 slots is enough */
439 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 750 if (SLOT_COUNT >= 1) CXINC;
440 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 751 if (SLOT_COUNT >= 2) CXINC;
441 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 752 if (SLOT_COUNT >= 3) CXINC;
753 {
754 unsigned int i;
755 for (i = 3; i < SLOT_COUNT; ++i)
756 CXINC;
757 }
758 cxstack_ix -= SLOT_COUNT; /* undo allocation */
442 759
760 c->mainstack = PL_mainstack;
761
762 {
763 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
764
765 slot->defav = GvAV (PL_defgv);
766 slot->defsv = DEFSV;
767 slot->errsv = ERRSV;
768 slot->irsgv = GvSV (irsgv);
769 slot->hinthv = GvHV (PL_hintgv);
770
443#define VAR(name,type)c->name = PL_ ## name; 771 #define VAR(name,type) slot->name = PL_ ## name;
444# include "state.h" 772 # include "state.h"
445#undef VAR 773 #undef VAR
774 }
446} 775}
447 776
448/* 777/*
449 * allocate various perl stacks. This is an exact copy 778 * allocate various perl stacks. This is almost an exact copy
450 * of perl.c:init_stacks, except that it uses less memory 779 * of perl.c:init_stacks, except that it uses less memory
451 * on the (sometimes correct) assumption that coroutines do 780 * on the (sometimes correct) assumption that coroutines do
452 * not usually need a lot of stackspace. 781 * not usually need a lot of stackspace.
453 */ 782 */
454#if CORO_PREFER_PERL_FUNCTIONS 783#if CORO_PREFER_PERL_FUNCTIONS
455# define coro_init_stacks init_stacks 784# define coro_init_stacks(thx) init_stacks ()
456#else 785#else
457static void 786static void
458coro_init_stacks (pTHX) 787coro_init_stacks (pTHX)
459{ 788{
460 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 789 PL_curstackinfo = new_stackinfo(32, 8);
461 PL_curstackinfo->si_type = PERLSI_MAIN; 790 PL_curstackinfo->si_type = PERLSI_MAIN;
462 PL_curstack = PL_curstackinfo->si_stack; 791 PL_curstack = PL_curstackinfo->si_stack;
463 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 792 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
464 793
465 PL_stack_base = AvARRAY(PL_curstack); 794 PL_stack_base = AvARRAY(PL_curstack);
466 PL_stack_sp = PL_stack_base; 795 PL_stack_sp = PL_stack_base;
467 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 796 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
468 797
469 New(50,PL_tmps_stack,128,SV*); 798 New(50,PL_tmps_stack,32,SV*);
470 PL_tmps_floor = -1; 799 PL_tmps_floor = -1;
471 PL_tmps_ix = -1; 800 PL_tmps_ix = -1;
472 PL_tmps_max = 128; 801 PL_tmps_max = 32;
473 802
474 New(54,PL_markstack,32,I32); 803 New(54,PL_markstack,16,I32);
475 PL_markstack_ptr = PL_markstack; 804 PL_markstack_ptr = PL_markstack;
476 PL_markstack_max = PL_markstack + 32; 805 PL_markstack_max = PL_markstack + 16;
477 806
478#ifdef SET_MARK_OFFSET 807#ifdef SET_MARK_OFFSET
479 SET_MARK_OFFSET; 808 SET_MARK_OFFSET;
480#endif 809#endif
481 810
482 New(54,PL_scopestack,32,I32); 811 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 812 PL_scopestack_ix = 0;
484 PL_scopestack_max = 32; 813 PL_scopestack_max = 8;
485 814
486 New(54,PL_savestack,64,ANY); 815 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 816 PL_savestack_ix = 0;
488 PL_savestack_max = 64; 817 PL_savestack_max = 24;
489 818
490#if !PERL_VERSION_ATLEAST (5,9,0) 819#if !PERL_VERSION_ATLEAST (5,10,0)
491 New(54,PL_retstack,16,OP*); 820 New(54,PL_retstack,4,OP*);
492 PL_retstack_ix = 0; 821 PL_retstack_ix = 0;
493 PL_retstack_max = 16; 822 PL_retstack_max = 4;
494#endif 823#endif
495} 824}
496#endif 825#endif
497 826
498/* 827/*
499 * destroy the stacks, the callchain etc... 828 * destroy the stacks, the callchain etc...
500 */ 829 */
501static void 830static void
502coro_destroy_stacks (pTHX) 831coro_destruct_stacks (pTHX)
503{ 832{
504 if (!IN_DESTRUCT)
505 {
506 /* restore all saved variables and stuff */
507 LEAVE_SCOPE (0);
508 assert (PL_tmps_floor == -1);
509
510 /* free all temporaries */
511 FREETMPS;
512 assert (PL_tmps_ix == -1);
513
514 /* unwind all extra stacks */
515 POPSTACK_TO (PL_mainstack);
516
517 /* unwind main stack */
518 dounwind (-1);
519 }
520
521 while (PL_curstackinfo->si_next) 833 while (PL_curstackinfo->si_next)
522 PL_curstackinfo = PL_curstackinfo->si_next; 834 PL_curstackinfo = PL_curstackinfo->si_next;
523 835
524 while (PL_curstackinfo) 836 while (PL_curstackinfo)
525 { 837 {
… …
535 847
536 Safefree (PL_tmps_stack); 848 Safefree (PL_tmps_stack);
537 Safefree (PL_markstack); 849 Safefree (PL_markstack);
538 Safefree (PL_scopestack); 850 Safefree (PL_scopestack);
539 Safefree (PL_savestack); 851 Safefree (PL_savestack);
540#if !PERL_VERSION_ATLEAST (5,9,0) 852#if !PERL_VERSION_ATLEAST (5,10,0)
541 Safefree (PL_retstack); 853 Safefree (PL_retstack);
542#endif 854#endif
543} 855}
544 856
857#define CORO_RSS \
858 rss += sizeof (SYM (curstackinfo)); \
859 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
860 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
861 rss += SYM (tmps_max) * sizeof (SV *); \
862 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
863 rss += SYM (scopestack_max) * sizeof (I32); \
864 rss += SYM (savestack_max) * sizeof (ANY);
865
866static size_t
867coro_rss (pTHX_ struct coro *coro)
868{
869 size_t rss = sizeof (*coro);
870
871 if (coro->mainstack)
872 {
873 if (coro->flags & CF_RUNNING)
874 {
875 #define SYM(sym) PL_ ## sym
876 CORO_RSS;
877 #undef SYM
878 }
879 else
880 {
881 #define SYM(sym) coro->slot->sym
882 CORO_RSS;
883 #undef SYM
884 }
885 }
886
887 return rss;
888}
889
545/** coroutine stack handling ************************************************/ 890/** coroutine stack handling ************************************************/
546 891
892static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
893static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
894static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
895
896/* apparently < 5.8.8 */
897#ifndef MgPV_nolen_const
898#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
899 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
900 (const char*)(mg)->mg_ptr)
901#endif
902
903/*
904 * This overrides the default magic get method of %SIG elements.
905 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
906 * and instead of trying to save and restore the hash elements, we just provide
907 * readback here.
908 */
547static void 909static int
910coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
911{
912 const char *s = MgPV_nolen_const (mg);
913
914 if (*s == '_')
915 {
916 SV **svp = 0;
917
918 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
919 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
920
921 if (svp)
922 {
923 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
924 return 0;
925 }
926 }
927
928 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
929}
930
931static int
932coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
933{
934 const char *s = MgPV_nolen_const (mg);
935
936 if (*s == '_')
937 {
938 SV **svp = 0;
939
940 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
941 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
942
943 if (svp)
944 {
945 SV *old = *svp;
946 *svp = 0;
947 SvREFCNT_dec (old);
948 return 0;
949 }
950 }
951
952 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
953}
954
955static int
956coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
957{
958 const char *s = MgPV_nolen_const (mg);
959
960 if (*s == '_')
961 {
962 SV **svp = 0;
963
964 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
965 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
966
967 if (svp)
968 {
969 SV *old = *svp;
970 *svp = SvOK (sv) ? newSVsv (sv) : 0;
971 SvREFCNT_dec (old);
972 return 0;
973 }
974 }
975
976 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
977}
978
979static void
980prepare_nop (pTHX_ struct coro_transfer_args *ta)
981{
982 /* kind of mega-hacky, but works */
983 ta->next = ta->prev = (struct coro *)ta;
984}
985
986static int
987slf_check_nop (pTHX_ struct CoroSLF *frame)
988{
989 return 0;
990}
991
992static int
993slf_check_repeat (pTHX_ struct CoroSLF *frame)
994{
995 return 1;
996}
997
998static UNOP init_perl_op;
999
1000static void NOINLINE /* noinline to keep it out of the transfer fast path */
548setup_coro (pTHX_ struct coro *coro) 1001init_perl (pTHX_ struct coro *coro)
549{ 1002{
550 /* 1003 /*
551 * emulate part of the perl startup here. 1004 * emulate part of the perl startup here.
552 */ 1005 */
553 coro_init_stacks (aTHX); 1006 coro_init_stacks (aTHX);
554 1007
1008 PL_runops = RUNOPS_DEFAULT;
555 PL_curcop = &PL_compiling; 1009 PL_curcop = &PL_compiling;
556 PL_in_eval = EVAL_NULL; 1010 PL_in_eval = EVAL_NULL;
557 PL_comppad = 0; 1011 PL_comppad = 0;
1012 PL_comppad_name = 0;
1013 PL_comppad_name_fill = 0;
1014 PL_comppad_name_floor = 0;
558 PL_curpm = 0; 1015 PL_curpm = 0;
1016 PL_curpad = 0;
559 PL_localizing = 0; 1017 PL_localizing = 0;
560 PL_dirty = 0; 1018 PL_dirty = 0;
561 PL_restartop = 0; 1019 PL_restartop = 0;
1020#if PERL_VERSION_ATLEAST (5,10,0)
1021 PL_parser = 0;
1022#endif
1023 PL_hints = 0;
1024
1025 /* recreate the die/warn hooks */
1026 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1027 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1028
1029 GvSV (PL_defgv) = newSV (0);
1030 GvAV (PL_defgv) = coro->args; coro->args = 0;
1031 GvSV (PL_errgv) = newSV (0);
1032 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1033 GvHV (PL_hintgv) = 0;
1034 PL_rs = newSVsv (GvSV (irsgv));
1035 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
562 1036
563 { 1037 {
564 dSP; 1038 dSP;
565 LOGOP myop; 1039 UNOP myop;
566 1040
567 SvREFCNT_dec (GvAV (PL_defgv));
568 GvAV (PL_defgv) = coro->args; coro->args = 0;
569
570 Zero (&myop, 1, LOGOP); 1041 Zero (&myop, 1, UNOP);
571 myop.op_next = Nullop; 1042 myop.op_next = Nullop;
1043 myop.op_type = OP_ENTERSUB;
572 myop.op_flags = OPf_WANT_VOID; 1044 myop.op_flags = OPf_WANT_VOID;
573 1045
574 PUSHMARK (SP); 1046 PUSHMARK (SP);
575 XPUSHs (av_shift (GvAV (PL_defgv))); 1047 PUSHs ((SV *)coro->startcv);
576 PUTBACK; 1048 PUTBACK;
577 PL_op = (OP *)&myop; 1049 PL_op = (OP *)&myop;
578 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1050 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
579 SPAGAIN;
580 } 1051 }
581 1052
582 ENTER; /* necessary e.g. for dounwind */ 1053 /* this newly created coroutine might be run on an existing cctx which most
583} 1054 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1055 */
1056 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1057 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
584 1058
1059 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1060 init_perl_op.op_next = PL_op;
1061 init_perl_op.op_type = OP_ENTERSUB;
1062 init_perl_op.op_ppaddr = pp_slf;
1063 /* no flags etc. required, as an init function won't be called */
1064
1065 PL_op = (OP *)&init_perl_op;
1066
1067 /* copy throw, in case it was set before init_perl */
1068 CORO_THROW = coro->except;
1069
1070 SWAP_SVS (coro);
1071
1072 if (expect_false (enable_times))
1073 {
1074 coro_times_update ();
1075 coro_times_sub (coro);
1076 }
1077}
1078
585static void 1079static void
1080coro_unwind_stacks (pTHX)
1081{
1082 if (!IN_DESTRUCT)
1083 {
1084 /* restore all saved variables and stuff */
1085 LEAVE_SCOPE (0);
1086 assert (PL_tmps_floor == -1);
1087
1088 /* free all temporaries */
1089 FREETMPS;
1090 assert (PL_tmps_ix == -1);
1091
1092 /* unwind all extra stacks */
1093 POPSTACK_TO (PL_mainstack);
1094
1095 /* unwind main stack */
1096 dounwind (-1);
1097 }
1098}
1099
1100static void
1101destroy_perl (pTHX_ struct coro *coro)
1102{
1103 SV *svf [9];
1104
1105 {
1106 struct coro *current = SvSTATE_current;
1107
1108 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1109
1110 save_perl (aTHX_ current);
1111 load_perl (aTHX_ coro);
1112
1113 coro_unwind_stacks (aTHX);
1114 coro_destruct_stacks (aTHX);
1115
1116 /* restore swapped sv's */
1117 SWAP_SVS (coro);
1118
1119 // now save some sv's to be free'd later
1120 svf [0] = GvSV (PL_defgv);
1121 svf [1] = (SV *)GvAV (PL_defgv);
1122 svf [2] = GvSV (PL_errgv);
1123 svf [3] = (SV *)PL_defoutgv;
1124 svf [4] = PL_rs;
1125 svf [5] = GvSV (irsgv);
1126 svf [6] = (SV *)GvHV (PL_hintgv);
1127 svf [7] = PL_diehook;
1128 svf [8] = PL_warnhook;
1129 assert (9 == sizeof (svf) / sizeof (*svf));
1130
1131 load_perl (aTHX_ current);
1132 }
1133
1134 {
1135 unsigned int i;
1136
1137 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1138 SvREFCNT_dec (svf [i]);
1139
1140 SvREFCNT_dec (coro->saved_deffh);
1141 SvREFCNT_dec (coro->rouse_cb);
1142 SvREFCNT_dec (coro->invoke_cb);
1143 SvREFCNT_dec (coro->invoke_av);
1144 }
1145}
1146
1147INLINE void
586free_coro_mortal (pTHX) 1148free_coro_mortal (pTHX)
587{ 1149{
588 if (coro_mortal) 1150 if (expect_true (coro_mortal))
589 { 1151 {
590 SvREFCNT_dec (coro_mortal); 1152 SvREFCNT_dec (coro_mortal);
591 coro_mortal = 0; 1153 coro_mortal = 0;
592 } 1154 }
593} 1155}
594 1156
595/* inject a fake call to Coro::State::_cctx_init into the execution */ 1157static int
596/* _cctx_init should be careful, as it could be called at almost any time */ 1158runops_trace (pTHX)
597/* during execution of a perl program */ 1159{
1160 COP *oldcop = 0;
1161 int oldcxix = -2;
1162
1163 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1164 {
1165 PERL_ASYNC_CHECK ();
1166
1167 if (cctx_current->flags & CC_TRACE_ALL)
1168 {
1169 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1170 {
1171 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1172 SV **bot, **top;
1173 AV *av = newAV (); /* return values */
1174 SV **cb;
1175 dSP;
1176
1177 GV *gv = CvGV (cx->blk_sub.cv);
1178 SV *fullname = sv_2mortal (newSV (0));
1179 if (isGV (gv))
1180 gv_efullname3 (fullname, gv, 0);
1181
1182 bot = PL_stack_base + cx->blk_oldsp + 1;
1183 top = cx->blk_gimme == G_ARRAY ? SP + 1
1184 : cx->blk_gimme == G_SCALAR ? bot + 1
1185 : bot;
1186
1187 av_extend (av, top - bot);
1188 while (bot < top)
1189 av_push (av, SvREFCNT_inc_NN (*bot++));
1190
1191 PL_runops = RUNOPS_DEFAULT;
1192 ENTER;
1193 SAVETMPS;
1194 EXTEND (SP, 3);
1195 PUSHMARK (SP);
1196 PUSHs (&PL_sv_no);
1197 PUSHs (fullname);
1198 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1199 PUTBACK;
1200 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1201 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1202 SPAGAIN;
1203 FREETMPS;
1204 LEAVE;
1205 PL_runops = runops_trace;
1206 }
1207
1208 if (oldcop != PL_curcop)
1209 {
1210 oldcop = PL_curcop;
1211
1212 if (PL_curcop != &PL_compiling)
1213 {
1214 SV **cb;
1215
1216 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1217 {
1218 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1219
1220 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1221 {
1222 dSP;
1223 GV *gv = CvGV (cx->blk_sub.cv);
1224 SV *fullname = sv_2mortal (newSV (0));
1225
1226 if (isGV (gv))
1227 gv_efullname3 (fullname, gv, 0);
1228
1229 PL_runops = RUNOPS_DEFAULT;
1230 ENTER;
1231 SAVETMPS;
1232 EXTEND (SP, 3);
1233 PUSHMARK (SP);
1234 PUSHs (&PL_sv_yes);
1235 PUSHs (fullname);
1236 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1237 PUTBACK;
1238 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1239 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1240 SPAGAIN;
1241 FREETMPS;
1242 LEAVE;
1243 PL_runops = runops_trace;
1244 }
1245
1246 oldcxix = cxstack_ix;
1247 }
1248
1249 if (cctx_current->flags & CC_TRACE_LINE)
1250 {
1251 dSP;
1252
1253 PL_runops = RUNOPS_DEFAULT;
1254 ENTER;
1255 SAVETMPS;
1256 EXTEND (SP, 3);
1257 PL_runops = RUNOPS_DEFAULT;
1258 PUSHMARK (SP);
1259 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1260 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1261 PUTBACK;
1262 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1263 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1264 SPAGAIN;
1265 FREETMPS;
1266 LEAVE;
1267 PL_runops = runops_trace;
1268 }
1269 }
1270 }
1271 }
1272 }
1273
1274 TAINT_NOT;
1275 return 0;
1276}
1277
1278static struct CoroSLF cctx_ssl_frame;
1279
1280static void
1281slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1282{
1283 ta->prev = 0;
1284}
1285
1286static int
1287slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1288{
1289 *frame = cctx_ssl_frame;
1290
1291 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1292}
1293
1294/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
598static void NOINLINE 1295static void NOINLINE
599prepare_cctx (pTHX_ coro_cctx *cctx) 1296cctx_prepare (pTHX)
600{ 1297{
601 dSP; 1298 PL_top_env = &PL_start_env;
602 LOGOP myop;
603 1299
604 Zero (&myop, 1, LOGOP); 1300 if (cctx_current->flags & CC_TRACE)
605 myop.op_next = PL_op; 1301 PL_runops = runops_trace;
606 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
607 1302
608 PUSHMARK (SP); 1303 /* we already must be executing an SLF op, there is no other valid way
609 EXTEND (SP, 2); 1304 * that can lead to creation of a new cctx */
610 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1305 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
611 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1306 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
612 PUTBACK; 1307
613 PL_op = (OP *)&myop; 1308 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
614 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1309 cctx_ssl_frame = slf_frame;
615 SPAGAIN; 1310
1311 slf_frame.prepare = slf_prepare_set_stacklevel;
1312 slf_frame.check = slf_check_set_stacklevel;
1313}
1314
1315/* the tail of transfer: execute stuff we can only do after a transfer */
1316INLINE void
1317transfer_tail (pTHX)
1318{
1319 free_coro_mortal (aTHX);
616} 1320}
617 1321
618/* 1322/*
619 * this is a _very_ stripped down perl interpreter ;) 1323 * this is a _very_ stripped down perl interpreter ;)
620 */ 1324 */
621static void 1325static void
622coro_run (void *arg) 1326cctx_run (void *arg)
623{ 1327{
1328#ifdef USE_ITHREADS
1329# if CORO_PTHREAD
1330 PERL_SET_CONTEXT (coro_thx);
1331# endif
1332#endif
1333 {
624 dTHX; 1334 dTHX;
625 1335
626 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1336 /* normally we would need to skip the entersub here */
627 UNLOCK; 1337 /* not doing so will re-execute it, which is exactly what we want */
1338 /* PL_nop = PL_nop->op_next */
628 1339
629 PL_top_env = &PL_start_env;
630
631 /* inject a fake subroutine call to cctx_init */ 1340 /* inject a fake subroutine call to cctx_init */
632 prepare_cctx (aTHX_ (coro_cctx *)arg); 1341 cctx_prepare (aTHX);
633 1342
1343 /* cctx_run is the alternative tail of transfer() */
1344 transfer_tail (aTHX);
1345
634 /* somebody or something will hit me for both perl_run and PL_restartop */ 1346 /* somebody or something will hit me for both perl_run and PL_restartop */
635 PL_restartop = PL_op; 1347 PL_restartop = PL_op;
636 perl_run (PL_curinterp); 1348 perl_run (PL_curinterp);
637
638 /* 1349 /*
1350 * Unfortunately, there is no way to get at the return values of the
1351 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1352 * runtime errors here, as this is just a random interpreter, not a thread.
1353 */
1354
1355 /*
639 * If perl-run returns we assume exit() was being called or the coro 1356 * If perl-run returns we assume exit() was being called or the coro
640 * fell off the end, which seems to be the only valid (non-bug) 1357 * fell off the end, which seems to be the only valid (non-bug)
641 * reason for perl_run to return. We try to exit by jumping to the 1358 * reason for perl_run to return. We try to exit by jumping to the
642 * bootstrap-time "top" top_env, as we cannot restore the "main" 1359 * bootstrap-time "top" top_env, as we cannot restore the "main"
643 * coroutine as Coro has no such concept 1360 * coroutine as Coro has no such concept.
1361 * This actually isn't valid with the pthread backend, but OSes requiring
1362 * that backend are too broken to do it in a standards-compliant way.
644 */ 1363 */
645 PL_top_env = main_top_env; 1364 PL_top_env = main_top_env;
646 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1365 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1366 }
647} 1367}
648 1368
649static coro_cctx * 1369static coro_cctx *
650cctx_new () 1370cctx_new ()
651{ 1371{
652 coro_cctx *cctx; 1372 coro_cctx *cctx;
1373
1374 ++cctx_count;
1375 New (0, cctx, 1, coro_cctx);
1376
1377 cctx->gen = cctx_gen;
1378 cctx->flags = 0;
1379 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1380
1381 return cctx;
1382}
1383
1384/* create a new cctx only suitable as source */
1385static coro_cctx *
1386cctx_new_empty ()
1387{
1388 coro_cctx *cctx = cctx_new ();
1389
1390 cctx->sptr = 0;
1391 coro_create (&cctx->cctx, 0, 0, 0, 0);
1392
1393 return cctx;
1394}
1395
1396/* create a new cctx suitable as destination/running a perl interpreter */
1397static coro_cctx *
1398cctx_new_run ()
1399{
1400 coro_cctx *cctx = cctx_new ();
653 void *stack_start; 1401 void *stack_start;
654 size_t stack_size; 1402 size_t stack_size;
655 1403
656 ++cctx_count;
657
658 Newz (0, cctx, 1, coro_cctx);
659
660#if HAVE_MMAP 1404#if HAVE_MMAP
661
662 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1405 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
663 /* mmap supposedly does allocate-on-write for us */ 1406 /* mmap supposedly does allocate-on-write for us */
664 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1407 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
665 1408
666 if (cctx->sptr != (void *)-1) 1409 if (cctx->sptr != (void *)-1)
667 { 1410 {
668# if CORO_STACKGUARD 1411 #if CORO_STACKGUARD
669 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1412 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
670# endif 1413 #endif
671 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1414 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
672 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1415 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
673 cctx->mapped = 1; 1416 cctx->flags |= CC_MAPPED;
674 } 1417 }
675 else 1418 else
676#endif 1419#endif
677 { 1420 {
678 cctx->ssize = coro_stacksize * (long)sizeof (long); 1421 cctx->ssize = cctx_stacksize * (long)sizeof (long);
679 New (0, cctx->sptr, coro_stacksize, long); 1422 New (0, cctx->sptr, cctx_stacksize, long);
680 1423
681 if (!cctx->sptr) 1424 if (!cctx->sptr)
682 { 1425 {
683 perror ("FATAL: unable to allocate stack for coroutine"); 1426 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
684 _exit (EXIT_FAILURE); 1427 _exit (EXIT_FAILURE);
685 } 1428 }
686 1429
687 stack_start = cctx->sptr; 1430 stack_start = cctx->sptr;
688 stack_size = cctx->ssize; 1431 stack_size = cctx->ssize;
689 } 1432 }
690 1433
691 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1434 #if CORO_USE_VALGRIND
1435 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1436 #endif
1437
692 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1438 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
693 1439
694 return cctx; 1440 return cctx;
695} 1441}
696 1442
697static void 1443static void
698cctx_destroy (coro_cctx *cctx) 1444cctx_destroy (coro_cctx *cctx)
699{ 1445{
700 if (!cctx) 1446 if (!cctx)
701 return; 1447 return;
702 1448
1449 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1450
703 --cctx_count; 1451 --cctx_count;
1452 coro_destroy (&cctx->cctx);
704 1453
1454 /* coro_transfer creates new, empty cctx's */
1455 if (cctx->sptr)
1456 {
705#if CORO_USE_VALGRIND 1457 #if CORO_USE_VALGRIND
706 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1458 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1459 #endif
1460
1461#if HAVE_MMAP
1462 if (cctx->flags & CC_MAPPED)
1463 munmap (cctx->sptr, cctx->ssize);
1464 else
707#endif 1465#endif
708
709#if HAVE_MMAP
710 if (cctx->mapped)
711 munmap (cctx->sptr, cctx->ssize);
712 else
713#endif
714 Safefree (cctx->sptr); 1466 Safefree (cctx->sptr);
1467 }
715 1468
716 Safefree (cctx); 1469 Safefree (cctx);
717} 1470}
1471
1472/* wether this cctx should be destructed */
1473#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
718 1474
719static coro_cctx * 1475static coro_cctx *
720cctx_get (pTHX) 1476cctx_get (pTHX)
721{ 1477{
722 while (cctx_first) 1478 while (expect_true (cctx_first))
723 { 1479 {
724 coro_cctx *cctx = cctx_first; 1480 coro_cctx *cctx = cctx_first;
725 cctx_first = cctx->next; 1481 cctx_first = cctx->next;
726 --cctx_idle; 1482 --cctx_idle;
727 1483
728 if (cctx->ssize >= coro_stacksize) 1484 if (expect_true (!CCTX_EXPIRED (cctx)))
729 return cctx; 1485 return cctx;
730 1486
731 cctx_destroy (cctx); 1487 cctx_destroy (cctx);
732 } 1488 }
733 1489
734 PL_op = PL_op->op_next;
735 return cctx_new (); 1490 return cctx_new_run ();
736} 1491}
737 1492
738static void 1493static void
739cctx_put (coro_cctx *cctx) 1494cctx_put (coro_cctx *cctx)
740{ 1495{
1496 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1497
741 /* free another cctx if overlimit */ 1498 /* free another cctx if overlimit */
742 if (cctx_idle >= MAX_IDLE_CCTX) 1499 if (expect_false (cctx_idle >= cctx_max_idle))
743 { 1500 {
744 coro_cctx *first = cctx_first; 1501 coro_cctx *first = cctx_first;
745 cctx_first = first->next; 1502 cctx_first = first->next;
746 --cctx_idle; 1503 --cctx_idle;
747 1504
748 assert (!first->inuse);
749 cctx_destroy (first); 1505 cctx_destroy (first);
750 } 1506 }
751 1507
752 ++cctx_idle; 1508 ++cctx_idle;
753 cctx->next = cctx_first; 1509 cctx->next = cctx_first;
754 cctx_first = cctx; 1510 cctx_first = cctx;
755} 1511}
756 1512
757/** coroutine switching *****************************************************/ 1513/** coroutine switching *****************************************************/
758 1514
759/* never call directly, always through the coro_state_transfer global variable */ 1515static void
760static void NOINLINE
761transfer (pTHX_ struct coro *prev, struct coro *next) 1516transfer_check (pTHX_ struct coro *prev, struct coro *next)
1517{
1518 /* TODO: throwing up here is considered harmful */
1519
1520 if (expect_true (prev != next))
1521 {
1522 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1523 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1524
1525 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1526 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1527
1528#if !PERL_VERSION_ATLEAST (5,10,0)
1529 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1530 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1531#endif
1532 }
1533}
1534
1535/* always use the TRANSFER macro */
1536static void NOINLINE /* noinline so we have a fixed stackframe */
1537transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
762{ 1538{
763 dSTACKLEVEL; 1539 dSTACKLEVEL;
764 1540
765 /* sometimes transfer is only called to set idle_sp */ 1541 /* sometimes transfer is only called to set idle_sp */
766 if (!next) 1542 if (expect_false (!prev))
767 { 1543 {
768 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1544 cctx_current->idle_sp = STACKLEVEL;
769 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1545 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
770 }
771 else if (prev != next)
772 { 1546 }
1547 else if (expect_true (prev != next))
1548 {
773 coro_cctx *prev__cctx; 1549 coro_cctx *cctx_prev;
774 1550
775 if (prev->flags & CF_NEW) 1551 if (expect_false (prev->flags & CF_NEW))
776 { 1552 {
777 /* create a new empty context */ 1553 /* create a new empty/source context */
778 Newz (0, prev->cctx, 1, coro_cctx);
779 prev->cctx->inuse = 1;
780 prev->flags &= ~CF_NEW; 1554 prev->flags &= ~CF_NEW;
781 prev->flags |= CF_RUNNING; 1555 prev->flags |= CF_RUNNING;
782 } 1556 }
783 1557
784 /*TODO: must not croak here */
785 if (!prev->flags & CF_RUNNING)
786 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
787
788 if (next->flags & CF_RUNNING)
789 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
790
791 if (next->flags & CF_DESTROYED)
792 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
793
794 prev->flags &= ~CF_RUNNING; 1558 prev->flags &= ~CF_RUNNING;
795 next->flags |= CF_RUNNING; 1559 next->flags |= CF_RUNNING;
796 1560
797 LOCK; 1561 /* first get rid of the old state */
1562 save_perl (aTHX_ prev);
798 1563
799 if (next->flags & CF_NEW) 1564 if (expect_false (next->flags & CF_NEW))
800 { 1565 {
801 /* need to start coroutine */ 1566 /* need to start coroutine */
802 next->flags &= ~CF_NEW; 1567 next->flags &= ~CF_NEW;
803 /* first get rid of the old state */
804 save_perl (aTHX_ prev);
805 /* setup coroutine call */ 1568 /* setup coroutine call */
806 setup_coro (aTHX_ next); 1569 init_perl (aTHX_ next);
807 /* need a new stack */
808 assert (!next->cctx);
809 } 1570 }
810 else 1571 else
1572 load_perl (aTHX_ next);
1573
1574 /* possibly untie and reuse the cctx */
1575 if (expect_true (
1576 cctx_current->idle_sp == STACKLEVEL
1577 && !(cctx_current->flags & CC_TRACE)
1578 && !force_cctx
1579 ))
811 { 1580 {
812 /* coroutine already started */ 1581 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
813 save_perl (aTHX_ prev); 1582 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
814 load_perl (aTHX_ next); 1583
1584 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1585 /* without this the next cctx_get might destroy the running cctx while still in use */
1586 if (expect_false (CCTX_EXPIRED (cctx_current)))
1587 if (expect_true (!next->cctx))
1588 next->cctx = cctx_get (aTHX);
1589
1590 cctx_put (cctx_current);
815 } 1591 }
1592 else
1593 prev->cctx = cctx_current;
816 1594
817 prev__cctx = prev->cctx; 1595 ++next->usecount;
818 1596
819 /* possibly "free" the cctx */ 1597 cctx_prev = cctx_current;
820 if (prev__cctx->idle_sp == STACKLEVEL) 1598 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1599
1600 next->cctx = 0;
1601
1602 if (expect_false (cctx_prev != cctx_current))
821 { 1603 {
822 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1604 cctx_prev->top_env = PL_top_env;
823 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1605 PL_top_env = cctx_current->top_env;
824 1606 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
825 prev->cctx = 0;
826
827 cctx_put (prev__cctx);
828 prev__cctx->inuse = 0;
829 } 1607 }
830 1608
831 if (!next->cctx) 1609 transfer_tail (aTHX);
832 {
833 next->cctx = cctx_get (aTHX);
834 assert (!next->cctx->inuse);
835 next->cctx->inuse = 1;
836 }
837
838 if (prev__cctx != next->cctx)
839 {
840 prev__cctx->top_env = PL_top_env;
841 PL_top_env = next->cctx->top_env;
842 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
843 }
844
845 free_coro_mortal (aTHX);
846 UNLOCK;
847 } 1610 }
848} 1611}
849 1612
850struct transfer_args 1613#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
851{
852 struct coro *prev, *next;
853};
854
855#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1614#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
856 1615
857/** high level stuff ********************************************************/ 1616/** high level stuff ********************************************************/
858 1617
859static int 1618static int
860coro_state_destroy (pTHX_ struct coro *coro) 1619coro_state_destroy (pTHX_ struct coro *coro)
861{ 1620{
862 if (coro->flags & CF_DESTROYED) 1621 if (coro->flags & CF_DESTROYED)
863 return 0; 1622 return 0;
1623
1624 if (coro->on_destroy && !PL_dirty)
1625 coro->on_destroy (aTHX_ coro);
864 1626
865 coro->flags |= CF_DESTROYED; 1627 coro->flags |= CF_DESTROYED;
866 1628
867 if (coro->flags & CF_READY) 1629 if (coro->flags & CF_READY)
868 { 1630 {
869 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1631 /* reduce nready, as destroying a ready coro effectively unreadies it */
870 /* alternative: look through all ready queues and remove the coro */ 1632 /* alternative: look through all ready queues and remove the coro */
871 LOCK;
872 --coro_nready; 1633 --coro_nready;
873 UNLOCK;
874 } 1634 }
875 else 1635 else
876 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1636 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
877 1637
878 if (coro->mainstack && coro->mainstack != main_mainstack) 1638 if (coro->mainstack
879 { 1639 && coro->mainstack != main_mainstack
880 struct coro temp; 1640 && coro->slot
881 1641 && !PL_dirty)
882 assert (!(coro->flags & CF_RUNNING));
883
884 Zero (&temp, 1, struct coro);
885 temp.save = CORO_SAVE_ALL;
886
887 if (coro->flags & CF_RUNNING)
888 croak ("FATAL: tried to destroy currently running coroutine");
889
890 save_perl (aTHX_ &temp);
891 load_perl (aTHX_ coro); 1642 destroy_perl (aTHX_ coro);
892
893 coro_destroy_stacks (aTHX);
894
895 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
896
897 coro->mainstack = 0;
898 }
899
900 cctx_destroy (coro->cctx);
901 SvREFCNT_dec (coro->args);
902 1643
903 if (coro->next) coro->next->prev = coro->prev; 1644 if (coro->next) coro->next->prev = coro->prev;
904 if (coro->prev) coro->prev->next = coro->next; 1645 if (coro->prev) coro->prev->next = coro->next;
905 if (coro == first) first = coro->next; 1646 if (coro == coro_first) coro_first = coro->next;
1647
1648 cctx_destroy (coro->cctx);
1649 SvREFCNT_dec (coro->startcv);
1650 SvREFCNT_dec (coro->args);
1651 SvREFCNT_dec (coro->swap_sv);
1652 SvREFCNT_dec (CORO_THROW);
906 1653
907 return 1; 1654 return 1;
908} 1655}
909 1656
910static int 1657static int
… …
943#else 1690#else
944# define MGf_DUP 0 1691# define MGf_DUP 0
945#endif 1692#endif
946}; 1693};
947 1694
948static struct coro *
949SvSTATE_ (pTHX_ SV *coro)
950{
951 HV *stash;
952 MAGIC *mg;
953
954 if (SvROK (coro))
955 coro = SvRV (coro);
956
957 stash = SvSTASH (coro);
958 if (stash != coro_stash && stash != coro_state_stash)
959 {
960 /* very slow, but rare, check */
961 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
962 croak ("Coro::State object required");
963 }
964
965 mg = CORO_MAGIC (coro);
966 return (struct coro *)mg->mg_ptr;
967}
968
969#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
970
971static void 1695static void
972prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1696prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
973{ 1697{
974 ta->prev = SvSTATE (prev_sv); 1698 ta->prev = SvSTATE (prev_sv);
975 ta->next = SvSTATE (next_sv); 1699 ta->next = SvSTATE (next_sv);
1700 TRANSFER_CHECK (*ta);
976} 1701}
977 1702
978static void 1703static void
979api_transfer (SV *prev_sv, SV *next_sv) 1704api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1705{
1706 struct coro_transfer_args ta;
1707
1708 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1709 TRANSFER (ta, 1);
1710}
1711
1712/** Coro ********************************************************************/
1713
1714INLINE void
1715coro_enq (pTHX_ struct coro *coro)
1716{
1717 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1718
1719 SvREFCNT_inc_NN (coro->hv);
1720
1721 coro->next_ready = 0;
1722 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1723 ready [1] = coro;
1724}
1725
1726INLINE struct coro *
1727coro_deq (pTHX)
1728{
1729 int prio;
1730
1731 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1732 {
1733 struct coro **ready = coro_ready [prio];
1734
1735 if (ready [0])
1736 {
1737 struct coro *coro = ready [0];
1738 ready [0] = coro->next_ready;
1739 return coro;
1740 }
1741 }
1742
1743 return 0;
1744}
1745
1746static void
1747invoke_sv_ready_hook_helper (void)
980{ 1748{
981 dTHX; 1749 dTHX;
982 struct transfer_args ta; 1750 dSP;
983 1751
984 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1752 ENTER;
985 TRANSFER (ta); 1753 SAVETMPS;
1754
1755 PUSHMARK (SP);
1756 PUTBACK;
1757 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1758
1759 FREETMPS;
1760 LEAVE;
986} 1761}
987 1762
988static int 1763static int
989api_save (SV *coro_sv, int new_save) 1764api_ready (pTHX_ SV *coro_sv)
990{ 1765{
991 dTHX;
992 struct coro *coro = SvSTATE (coro_sv); 1766 struct coro *coro = SvSTATE (coro_sv);
993 int old_save = coro->save;
994
995 if (new_save >= 0)
996 coro->save = new_save;
997
998 return old_save;
999}
1000
1001/** Coro ********************************************************************/
1002
1003static void
1004coro_enq (pTHX_ SV *coro_sv)
1005{
1006 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1007}
1008
1009static SV *
1010coro_deq (pTHX_ int min_prio)
1011{
1012 int prio = PRIO_MAX - PRIO_MIN;
1013
1014 min_prio -= PRIO_MIN;
1015 if (min_prio < 0)
1016 min_prio = 0;
1017
1018 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1019 if (AvFILLp (coro_ready [prio]) >= 0)
1020 return av_shift (coro_ready [prio]);
1021
1022 return 0;
1023}
1024
1025static int
1026api_ready (SV *coro_sv)
1027{
1028 dTHX;
1029 struct coro *coro;
1030
1031 if (SvROK (coro_sv))
1032 coro_sv = SvRV (coro_sv);
1033
1034 coro = SvSTATE (coro_sv);
1035 1767
1036 if (coro->flags & CF_READY) 1768 if (coro->flags & CF_READY)
1037 return 0; 1769 return 0;
1038 1770
1039 coro->flags |= CF_READY; 1771 coro->flags |= CF_READY;
1040 1772
1041 LOCK; 1773 coro_enq (aTHX_ coro);
1042 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1774
1043 ++coro_nready; 1775 if (!coro_nready++)
1044 UNLOCK; 1776 if (coroapi.readyhook)
1777 coroapi.readyhook ();
1045 1778
1046 return 1; 1779 return 1;
1047} 1780}
1048 1781
1049static int 1782static int
1050api_is_ready (SV *coro_sv) 1783api_is_ready (pTHX_ SV *coro_sv)
1051{ 1784{
1052 dTHX;
1053 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1785 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1054} 1786}
1055 1787
1788/* expects to own a reference to next->hv */
1789INLINE void
1790prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1791{
1792 SV *prev_sv = SvRV (coro_current);
1793
1794 ta->prev = SvSTATE_hv (prev_sv);
1795 ta->next = next;
1796
1797 TRANSFER_CHECK (*ta);
1798
1799 SvRV_set (coro_current, (SV *)next->hv);
1800
1801 free_coro_mortal (aTHX);
1802 coro_mortal = prev_sv;
1803}
1804
1056static void 1805static void
1057prepare_schedule (pTHX_ struct transfer_args *ta) 1806prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1058{ 1807{
1059 SV *prev_sv, *next_sv;
1060
1061 for (;;) 1808 for (;;)
1062 { 1809 {
1063 LOCK; 1810 struct coro *next = coro_deq (aTHX);
1064 next_sv = coro_deq (aTHX_ PRIO_MIN);
1065 1811
1812 if (expect_true (next))
1813 {
1814 /* cannot transfer to destroyed coros, skip and look for next */
1815 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1816 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1817 else
1818 {
1819 next->flags &= ~CF_READY;
1820 --coro_nready;
1821
1822 prepare_schedule_to (aTHX_ ta, next);
1823 break;
1824 }
1825 }
1826 else
1827 {
1066 /* nothing to schedule: call the idle handler */ 1828 /* nothing to schedule: call the idle handler */
1067 if (!next_sv) 1829 if (SvROK (sv_idle)
1830 && SvOBJECT (SvRV (sv_idle)))
1831 {
1832 if (SvRV (sv_idle) == SvRV (coro_current))
1833 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1834
1835 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1836 api_ready (aTHX_ SvRV (sv_idle));
1837 --coro_nready;
1838 }
1839 else
1840 {
1841 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1842 dSP;
1843
1844 ENTER;
1845 SAVETMPS;
1846
1847 PUSHMARK (SP);
1848 PUTBACK;
1849 call_sv (sv_idle, G_VOID | G_DISCARD);
1850
1851 FREETMPS;
1852 LEAVE;
1853 }
1854 }
1855 }
1856}
1857
1858INLINE void
1859prepare_cede (pTHX_ struct coro_transfer_args *ta)
1860{
1861 api_ready (aTHX_ coro_current);
1862 prepare_schedule (aTHX_ ta);
1863}
1864
1865INLINE void
1866prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1867{
1868 SV *prev = SvRV (coro_current);
1869
1870 if (coro_nready)
1871 {
1872 prepare_schedule (aTHX_ ta);
1873 api_ready (aTHX_ prev);
1874 }
1875 else
1876 prepare_nop (aTHX_ ta);
1877}
1878
1879static void
1880api_schedule (pTHX)
1881{
1882 struct coro_transfer_args ta;
1883
1884 prepare_schedule (aTHX_ &ta);
1885 TRANSFER (ta, 1);
1886}
1887
1888static void
1889api_schedule_to (pTHX_ SV *coro_sv)
1890{
1891 struct coro_transfer_args ta;
1892 struct coro *next = SvSTATE (coro_sv);
1893
1894 SvREFCNT_inc_NN (coro_sv);
1895 prepare_schedule_to (aTHX_ &ta, next);
1896}
1897
1898static int
1899api_cede (pTHX)
1900{
1901 struct coro_transfer_args ta;
1902
1903 prepare_cede (aTHX_ &ta);
1904
1905 if (expect_true (ta.prev != ta.next))
1906 {
1907 TRANSFER (ta, 1);
1908 return 1;
1909 }
1910 else
1911 return 0;
1912}
1913
1914static int
1915api_cede_notself (pTHX)
1916{
1917 if (coro_nready)
1918 {
1919 struct coro_transfer_args ta;
1920
1921 prepare_cede_notself (aTHX_ &ta);
1922 TRANSFER (ta, 1);
1923 return 1;
1924 }
1925 else
1926 return 0;
1927}
1928
1929static void
1930api_trace (pTHX_ SV *coro_sv, int flags)
1931{
1932 struct coro *coro = SvSTATE (coro_sv);
1933
1934 if (coro->flags & CF_RUNNING)
1935 croak ("cannot enable tracing on a running coroutine, caught");
1936
1937 if (flags & CC_TRACE)
1938 {
1939 if (!coro->cctx)
1940 coro->cctx = cctx_new_run ();
1941 else if (!(coro->cctx->flags & CC_TRACE))
1942 croak ("cannot enable tracing on coroutine with custom stack, caught");
1943
1944 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1945 }
1946 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1947 {
1948 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1949
1950 if (coro->flags & CF_RUNNING)
1951 PL_runops = RUNOPS_DEFAULT;
1952 else
1953 coro->slot->runops = RUNOPS_DEFAULT;
1954 }
1955}
1956
1957static void
1958coro_call_on_destroy (pTHX_ struct coro *coro)
1959{
1960 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1961 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1962
1963 if (on_destroyp)
1964 {
1965 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1966
1967 while (AvFILLp (on_destroy) >= 0)
1968 {
1969 dSP; /* don't disturb outer sp */
1970 SV *cb = av_pop (on_destroy);
1971
1972 PUSHMARK (SP);
1973
1974 if (statusp)
1975 {
1976 int i;
1977 AV *status = (AV *)SvRV (*statusp);
1978 EXTEND (SP, AvFILLp (status) + 1);
1979
1980 for (i = 0; i <= AvFILLp (status); ++i)
1981 PUSHs (AvARRAY (status)[i]);
1982 }
1983
1984 PUTBACK;
1985 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1986 }
1987 }
1988}
1989
1990static void
1991slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 int i;
1994 HV *hv = (HV *)SvRV (coro_current);
1995 AV *av = newAV ();
1996
1997 /* items are actually not so common, so optimise for this case */
1998 if (items)
1999 {
2000 av_extend (av, items - 1);
2001
2002 for (i = 0; i < items; ++i)
2003 av_push (av, SvREFCNT_inc_NN (arg [i]));
2004 }
2005
2006 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2007
2008 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2009 api_ready (aTHX_ sv_manager);
2010
2011 frame->prepare = prepare_schedule;
2012 frame->check = slf_check_repeat;
2013
2014 /* as a minor optimisation, we could unwind all stacks here */
2015 /* but that puts extra pressure on pp_slf, and is not worth much */
2016 /*coro_unwind_stacks (aTHX);*/
2017}
2018
2019/*****************************************************************************/
2020/* async pool handler */
2021
2022static int
2023slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2024{
2025 HV *hv = (HV *)SvRV (coro_current);
2026 struct coro *coro = (struct coro *)frame->data;
2027
2028 if (!coro->invoke_cb)
2029 return 1; /* loop till we have invoke */
2030 else
2031 {
2032 hv_store (hv, "desc", sizeof ("desc") - 1,
2033 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2034
2035 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2036
2037 {
2038 dSP;
2039 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2040 PUTBACK;
2041 }
2042
2043 SvREFCNT_dec (GvAV (PL_defgv));
2044 GvAV (PL_defgv) = coro->invoke_av;
2045 coro->invoke_av = 0;
2046
2047 return 0;
2048 }
2049}
2050
2051static void
2052slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2053{
2054 HV *hv = (HV *)SvRV (coro_current);
2055 struct coro *coro = SvSTATE_hv ((SV *)hv);
2056
2057 if (expect_true (coro->saved_deffh))
2058 {
2059 /* subsequent iteration */
2060 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2061 coro->saved_deffh = 0;
2062
2063 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2064 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2065 {
2066 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2067 coro->invoke_av = newAV ();
2068
2069 frame->prepare = prepare_nop;
2070 }
2071 else
2072 {
2073 av_clear (GvAV (PL_defgv));
2074 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2075
2076 coro->prio = 0;
2077
2078 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2079 api_trace (aTHX_ coro_current, 0);
2080
2081 frame->prepare = prepare_schedule;
2082 av_push (av_async_pool, SvREFCNT_inc (hv));
2083 }
2084 }
2085 else
2086 {
2087 /* first iteration, simply fall through */
2088 frame->prepare = prepare_nop;
2089 }
2090
2091 frame->check = slf_check_pool_handler;
2092 frame->data = (void *)coro;
2093}
2094
2095/*****************************************************************************/
2096/* rouse callback */
2097
2098#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2099
2100static void
2101coro_rouse_callback (pTHX_ CV *cv)
2102{
2103 dXSARGS;
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2107 {
2108 /* first call, set args */
2109 SV *coro = SvRV (data);
2110 AV *av = newAV ();
2111
2112 SvRV_set (data, (SV *)av);
2113
2114 /* better take a full copy of the arguments */
2115 while (items--)
2116 av_store (av, items, newSVsv (ST (items)));
2117
2118 api_ready (aTHX_ coro);
2119 SvREFCNT_dec (coro);
2120 }
2121
2122 XSRETURN_EMPTY;
2123}
2124
2125static int
2126slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2127{
2128 SV *data = (SV *)frame->data;
2129
2130 if (CORO_THROW)
2131 return 0;
2132
2133 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2134 return 1;
2135
2136 /* now push all results on the stack */
2137 {
2138 dSP;
2139 AV *av = (AV *)SvRV (data);
2140 int i;
2141
2142 EXTEND (SP, AvFILLp (av) + 1);
2143 for (i = 0; i <= AvFILLp (av); ++i)
2144 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2145
2146 /* we have stolen the elements, so set length to zero and free */
2147 AvFILLp (av) = -1;
2148 av_undef (av);
2149
2150 PUTBACK;
2151 }
2152
2153 return 0;
2154}
2155
2156static void
2157slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2158{
2159 SV *cb;
2160
2161 if (items)
2162 cb = arg [0];
2163 else
2164 {
2165 struct coro *coro = SvSTATE_current;
2166
2167 if (!coro->rouse_cb)
2168 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2169
2170 cb = sv_2mortal (coro->rouse_cb);
2171 coro->rouse_cb = 0;
2172 }
2173
2174 if (!SvROK (cb)
2175 || SvTYPE (SvRV (cb)) != SVt_PVCV
2176 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2177 croak ("Coro::rouse_wait called with illegal callback argument,");
2178
2179 {
2180 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2181 SV *data = (SV *)S_GENSUB_ARG;
2182
2183 frame->data = (void *)data;
2184 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2185 frame->check = slf_check_rouse_wait;
2186 }
2187}
2188
2189static SV *
2190coro_new_rouse_cb (pTHX)
2191{
2192 HV *hv = (HV *)SvRV (coro_current);
2193 struct coro *coro = SvSTATE_hv (hv);
2194 SV *data = newRV_inc ((SV *)hv);
2195 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2196
2197 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2198 SvREFCNT_dec (data); /* magicext increases the refcount */
2199
2200 SvREFCNT_dec (coro->rouse_cb);
2201 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2202
2203 return cb;
2204}
2205
2206/*****************************************************************************/
2207/* schedule-like-function opcode (SLF) */
2208
2209static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2210static const CV *slf_cv;
2211static SV **slf_argv;
2212static int slf_argc, slf_arga; /* count, allocated */
2213static I32 slf_ax; /* top of stack, for restore */
2214
2215/* this restores the stack in the case we patched the entersub, to */
2216/* recreate the stack frame as perl will on following calls */
2217/* since entersub cleared the stack */
2218static OP *
2219pp_restore (pTHX)
2220{
2221 int i;
2222 SV **SP = PL_stack_base + slf_ax;
2223
2224 PUSHMARK (SP);
2225
2226 EXTEND (SP, slf_argc + 1);
2227
2228 for (i = 0; i < slf_argc; ++i)
2229 PUSHs (sv_2mortal (slf_argv [i]));
2230
2231 PUSHs ((SV *)CvGV (slf_cv));
2232
2233 RETURNOP (slf_restore.op_first);
2234}
2235
2236static void
2237slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2238{
2239 SV **arg = (SV **)slf_frame.data;
2240
2241 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2242}
2243
2244static void
2245slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 if (items != 2)
2248 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2249
2250 frame->prepare = slf_prepare_transfer;
2251 frame->check = slf_check_nop;
2252 frame->data = (void *)arg; /* let's hope it will stay valid */
2253}
2254
2255static void
2256slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2257{
2258 frame->prepare = prepare_schedule;
2259 frame->check = slf_check_nop;
2260}
2261
2262static void
2263slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2264{
2265 struct coro *next = (struct coro *)slf_frame.data;
2266
2267 SvREFCNT_inc_NN (next->hv);
2268 prepare_schedule_to (aTHX_ ta, next);
2269}
2270
2271static void
2272slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2273{
2274 if (!items)
2275 croak ("Coro::schedule_to expects a coroutine argument, caught");
2276
2277 frame->data = (void *)SvSTATE (arg [0]);
2278 frame->prepare = slf_prepare_schedule_to;
2279 frame->check = slf_check_nop;
2280}
2281
2282static void
2283slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2284{
2285 api_ready (aTHX_ SvRV (coro_current));
2286
2287 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2288}
2289
2290static void
2291slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 frame->prepare = prepare_cede;
2294 frame->check = slf_check_nop;
2295}
2296
2297static void
2298slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 frame->prepare = prepare_cede_notself;
2301 frame->check = slf_check_nop;
2302}
2303
2304/*
2305 * these not obviously related functions are all rolled into one
2306 * function to increase chances that they all will call transfer with the same
2307 * stack offset
2308 * SLF stands for "schedule-like-function".
2309 */
2310static OP *
2311pp_slf (pTHX)
2312{
2313 I32 checkmark; /* mark SP to see how many elements check has pushed */
2314
2315 /* set up the slf frame, unless it has already been set-up */
2316 /* the latter happens when a new coro has been started */
2317 /* or when a new cctx was attached to an existing coroutine */
2318 if (expect_true (!slf_frame.prepare))
2319 {
2320 /* first iteration */
2321 dSP;
2322 SV **arg = PL_stack_base + TOPMARK + 1;
2323 int items = SP - arg; /* args without function object */
2324 SV *gv = *sp;
2325
2326 /* do a quick consistency check on the "function" object, and if it isn't */
2327 /* for us, divert to the real entersub */
2328 if (SvTYPE (gv) != SVt_PVGV
2329 || !GvCV (gv)
2330 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2331 return PL_ppaddr[OP_ENTERSUB](aTHX);
2332
2333 if (!(PL_op->op_flags & OPf_STACKED))
2334 {
2335 /* ampersand-form of call, use @_ instead of stack */
2336 AV *av = GvAV (PL_defgv);
2337 arg = AvARRAY (av);
2338 items = AvFILLp (av) + 1;
2339 }
2340
2341 /* now call the init function, which needs to set up slf_frame */
2342 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2343 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2344
2345 /* pop args */
2346 SP = PL_stack_base + POPMARK;
2347
2348 PUTBACK;
2349 }
2350
2351 /* now that we have a slf_frame, interpret it! */
2352 /* we use a callback system not to make the code needlessly */
2353 /* complicated, but so we can run multiple perl coros from one cctx */
2354
2355 do
2356 {
2357 struct coro_transfer_args ta;
2358
2359 slf_frame.prepare (aTHX_ &ta);
2360 TRANSFER (ta, 0);
2361
2362 checkmark = PL_stack_sp - PL_stack_base;
2363 }
2364 while (slf_frame.check (aTHX_ &slf_frame));
2365
2366 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2367
2368 /* exception handling */
2369 if (expect_false (CORO_THROW))
2370 {
2371 SV *exception = sv_2mortal (CORO_THROW);
2372
2373 CORO_THROW = 0;
2374 sv_setsv (ERRSV, exception);
2375 croak (0);
2376 }
2377
2378 /* return value handling - mostly like entersub */
2379 /* make sure we put something on the stack in scalar context */
2380 if (GIMME_V == G_SCALAR)
2381 {
2382 dSP;
2383 SV **bot = PL_stack_base + checkmark;
2384
2385 if (sp == bot) /* too few, push undef */
2386 bot [1] = &PL_sv_undef;
2387 else if (sp != bot + 1) /* too many, take last one */
2388 bot [1] = *sp;
2389
2390 SP = bot + 1;
2391
2392 PUTBACK;
2393 }
2394
2395 return NORMAL;
2396}
2397
2398static void
2399api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2400{
2401 int i;
2402 SV **arg = PL_stack_base + ax;
2403 int items = PL_stack_sp - arg + 1;
2404
2405 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2406
2407 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2408 && PL_op->op_ppaddr != pp_slf)
2409 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2410
2411 CvFLAGS (cv) |= CVf_SLF;
2412 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2413 slf_cv = cv;
2414
2415 /* we patch the op, and then re-run the whole call */
2416 /* we have to put the same argument on the stack for this to work */
2417 /* and this will be done by pp_restore */
2418 slf_restore.op_next = (OP *)&slf_restore;
2419 slf_restore.op_type = OP_CUSTOM;
2420 slf_restore.op_ppaddr = pp_restore;
2421 slf_restore.op_first = PL_op;
2422
2423 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2424
2425 if (PL_op->op_flags & OPf_STACKED)
2426 {
2427 if (items > slf_arga)
2428 {
2429 slf_arga = items;
2430 Safefree (slf_argv);
2431 New (0, slf_argv, slf_arga, SV *);
2432 }
2433
2434 slf_argc = items;
2435
2436 for (i = 0; i < items; ++i)
2437 slf_argv [i] = SvREFCNT_inc (arg [i]);
2438 }
2439 else
2440 slf_argc = 0;
2441
2442 PL_op->op_ppaddr = pp_slf;
2443 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2444
2445 PL_op = (OP *)&slf_restore;
2446}
2447
2448/*****************************************************************************/
2449/* dynamic wind */
2450
2451static void
2452on_enterleave_call (pTHX_ SV *cb)
2453{
2454 dSP;
2455
2456 PUSHSTACK;
2457
2458 PUSHMARK (SP);
2459 PUTBACK;
2460 call_sv (cb, G_VOID | G_DISCARD);
2461 SPAGAIN;
2462
2463 POPSTACK;
2464}
2465
2466static SV *
2467coro_avp_pop_and_free (pTHX_ AV **avp)
2468{
2469 AV *av = *avp;
2470 SV *res = av_pop (av);
2471
2472 if (AvFILLp (av) < 0)
2473 {
2474 *avp = 0;
2475 SvREFCNT_dec (av);
2476 }
2477
2478 return res;
2479}
2480
2481static void
2482coro_pop_on_enter (pTHX_ void *coro)
2483{
2484 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2485 SvREFCNT_dec (cb);
2486}
2487
2488static void
2489coro_pop_on_leave (pTHX_ void *coro)
2490{
2491 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2492 on_enterleave_call (aTHX_ sv_2mortal (cb));
2493}
2494
2495/*****************************************************************************/
2496/* PerlIO::cede */
2497
2498typedef struct
2499{
2500 PerlIOBuf base;
2501 NV next, every;
2502} PerlIOCede;
2503
2504static IV
2505PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2506{
2507 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2508
2509 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2510 self->next = nvtime () + self->every;
2511
2512 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2513}
2514
2515static SV *
2516PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2517{
2518 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2519
2520 return newSVnv (self->every);
2521}
2522
2523static IV
2524PerlIOCede_flush (pTHX_ PerlIO *f)
2525{
2526 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2527 double now = nvtime ();
2528
2529 if (now >= self->next)
2530 {
2531 api_cede (aTHX);
2532 self->next = now + self->every;
2533 }
2534
2535 return PerlIOBuf_flush (aTHX_ f);
2536}
2537
2538static PerlIO_funcs PerlIO_cede =
2539{
2540 sizeof(PerlIO_funcs),
2541 "cede",
2542 sizeof(PerlIOCede),
2543 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2544 PerlIOCede_pushed,
2545 PerlIOBuf_popped,
2546 PerlIOBuf_open,
2547 PerlIOBase_binmode,
2548 PerlIOCede_getarg,
2549 PerlIOBase_fileno,
2550 PerlIOBuf_dup,
2551 PerlIOBuf_read,
2552 PerlIOBuf_unread,
2553 PerlIOBuf_write,
2554 PerlIOBuf_seek,
2555 PerlIOBuf_tell,
2556 PerlIOBuf_close,
2557 PerlIOCede_flush,
2558 PerlIOBuf_fill,
2559 PerlIOBase_eof,
2560 PerlIOBase_error,
2561 PerlIOBase_clearerr,
2562 PerlIOBase_setlinebuf,
2563 PerlIOBuf_get_base,
2564 PerlIOBuf_bufsiz,
2565 PerlIOBuf_get_ptr,
2566 PerlIOBuf_get_cnt,
2567 PerlIOBuf_set_ptrcnt,
2568};
2569
2570/*****************************************************************************/
2571/* Coro::Semaphore & Coro::Signal */
2572
2573static SV *
2574coro_waitarray_new (pTHX_ int count)
2575{
2576 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2577 AV *av = newAV ();
2578 SV **ary;
2579
2580 /* unfortunately, building manually saves memory */
2581 Newx (ary, 2, SV *);
2582 AvALLOC (av) = ary;
2583#if PERL_VERSION_ATLEAST (5,10,0)
2584 AvARRAY (av) = ary;
2585#else
2586 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2587 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2588 SvPVX ((SV *)av) = (char *)ary;
2589#endif
2590 AvMAX (av) = 1;
2591 AvFILLp (av) = 0;
2592 ary [0] = newSViv (count);
2593
2594 return newRV_noinc ((SV *)av);
2595}
2596
2597/* semaphore */
2598
2599static void
2600coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2601{
2602 SV *count_sv = AvARRAY (av)[0];
2603 IV count = SvIVX (count_sv);
2604
2605 count += adjust;
2606 SvIVX (count_sv) = count;
2607
2608 /* now wake up as many waiters as are expected to lock */
2609 while (count > 0 && AvFILLp (av) > 0)
2610 {
2611 SV *cb;
2612
2613 /* swap first two elements so we can shift a waiter */
2614 AvARRAY (av)[0] = AvARRAY (av)[1];
2615 AvARRAY (av)[1] = count_sv;
2616 cb = av_shift (av);
2617
2618 if (SvOBJECT (cb))
2619 {
2620 api_ready (aTHX_ cb);
2621 --count;
2622 }
2623 else if (SvTYPE (cb) == SVt_PVCV)
1068 { 2624 {
1069 dSP; 2625 dSP;
1070 UNLOCK;
1071
1072 ENTER;
1073 SAVETMPS;
1074
1075 PUSHMARK (SP); 2626 PUSHMARK (SP);
2627 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1076 PUTBACK; 2628 PUTBACK;
1077 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2629 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1078
1079 FREETMPS;
1080 LEAVE;
1081 continue;
1082 } 2630 }
1083 2631
1084 ta->next = SvSTATE (next_sv); 2632 SvREFCNT_dec (cb);
2633 }
2634}
1085 2635
1086 /* cannot transfer to destroyed coros, skip and look for next */ 2636static void
1087 if (ta->next->flags & CF_DESTROYED) 2637coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2638{
2639 /* call $sem->adjust (0) to possibly wake up some other waiters */
2640 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2641}
2642
2643static int
2644slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2645{
2646 AV *av = (AV *)frame->data;
2647 SV *count_sv = AvARRAY (av)[0];
2648
2649 /* if we are about to throw, don't actually acquire the lock, just throw */
2650 if (CORO_THROW)
2651 return 0;
2652 else if (SvIVX (count_sv) > 0)
2653 {
2654 SvSTATE_current->on_destroy = 0;
2655
2656 if (acquire)
2657 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2658 else
2659 coro_semaphore_adjust (aTHX_ av, 0);
2660
2661 return 0;
2662 }
2663 else
2664 {
2665 int i;
2666 /* if we were woken up but can't down, we look through the whole */
2667 /* waiters list and only add us if we aren't in there already */
2668 /* this avoids some degenerate memory usage cases */
2669
2670 for (i = 1; i <= AvFILLp (av); ++i)
2671 if (AvARRAY (av)[i] == SvRV (coro_current))
2672 return 1;
2673
2674 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2675 return 1;
2676 }
2677}
2678
2679static int
2680slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2681{
2682 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2683}
2684
2685static int
2686slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2687{
2688 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2689}
2690
2691static void
2692slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2693{
2694 AV *av = (AV *)SvRV (arg [0]);
2695
2696 if (SvIVX (AvARRAY (av)[0]) > 0)
2697 {
2698 frame->data = (void *)av;
2699 frame->prepare = prepare_nop;
2700 }
2701 else
2702 {
2703 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2704
2705 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2706 frame->prepare = prepare_schedule;
2707
2708 /* to avoid race conditions when a woken-up coro gets terminated */
2709 /* we arrange for a temporary on_destroy that calls adjust (0) */
2710 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2711 }
2712}
2713
2714static void
2715slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2718 frame->check = slf_check_semaphore_down;
2719}
2720
2721static void
2722slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2723{
2724 if (items >= 2)
2725 {
2726 /* callback form */
2727 AV *av = (AV *)SvRV (arg [0]);
2728 SV *cb_cv = s_get_cv_croak (arg [1]);
2729
2730 av_push (av, SvREFCNT_inc_NN (cb_cv));
2731
2732 if (SvIVX (AvARRAY (av)[0]) > 0)
2733 coro_semaphore_adjust (aTHX_ av, 0);
2734
2735 frame->prepare = prepare_nop;
2736 frame->check = slf_check_nop;
2737 }
2738 else
2739 {
2740 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2741 frame->check = slf_check_semaphore_wait;
2742 }
2743}
2744
2745/* signal */
2746
2747static void
2748coro_signal_wake (pTHX_ AV *av, int count)
2749{
2750 SvIVX (AvARRAY (av)[0]) = 0;
2751
2752 /* now signal count waiters */
2753 while (count > 0 && AvFILLp (av) > 0)
2754 {
2755 SV *cb;
2756
2757 /* swap first two elements so we can shift a waiter */
2758 cb = AvARRAY (av)[0];
2759 AvARRAY (av)[0] = AvARRAY (av)[1];
2760 AvARRAY (av)[1] = cb;
2761
2762 cb = av_shift (av);
2763
2764 if (SvTYPE (cb) == SVt_PVCV)
1088 { 2765 {
2766 dSP;
2767 PUSHMARK (SP);
2768 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1089 UNLOCK; 2769 PUTBACK;
1090 SvREFCNT_dec (next_sv); 2770 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1091 /* coro_nready is already taken care of by destroy */
1092 continue;
1093 } 2771 }
2772 else
2773 {
2774 api_ready (aTHX_ cb);
2775 sv_setiv (cb, 0); /* signal waiter */
2776 }
1094 2777
1095 --coro_nready; 2778 SvREFCNT_dec (cb);
1096 UNLOCK;
1097 break;
1098 }
1099 2779
1100 /* free this only after the transfer */ 2780 --count;
1101 prev_sv = SvRV (coro_current); 2781 }
1102 SvRV_set (coro_current, next_sv);
1103 ta->prev = SvSTATE (prev_sv);
1104
1105 assert (ta->next->flags & CF_READY);
1106 ta->next->flags &= ~CF_READY;
1107
1108 LOCK;
1109 free_coro_mortal (aTHX);
1110 coro_mortal = prev_sv;
1111 UNLOCK;
1112}
1113
1114static void
1115prepare_cede (pTHX_ struct transfer_args *ta)
1116{
1117 api_ready (coro_current);
1118 prepare_schedule (aTHX_ ta);
1119} 2782}
1120 2783
1121static int 2784static int
1122prepare_cede_notself (pTHX_ struct transfer_args *ta) 2785slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1123{ 2786{
1124 if (coro_nready) 2787 /* if we are about to throw, also stop waiting */
2788 return SvROK ((SV *)frame->data) && !CORO_THROW;
2789}
2790
2791static void
2792slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2793{
2794 AV *av = (AV *)SvRV (arg [0]);
2795
2796 if (items >= 2)
2797 {
2798 SV *cb_cv = s_get_cv_croak (arg [1]);
2799 av_push (av, SvREFCNT_inc_NN (cb_cv));
2800
2801 if (SvIVX (AvARRAY (av)[0]))
2802 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2803
2804 frame->prepare = prepare_nop;
2805 frame->check = slf_check_nop;
1125 { 2806 }
1126 SV *prev = SvRV (coro_current); 2807 else if (SvIVX (AvARRAY (av)[0]))
1127 prepare_schedule (aTHX_ ta); 2808 {
1128 api_ready (prev); 2809 SvIVX (AvARRAY (av)[0]) = 0;
1129 return 1; 2810 frame->prepare = prepare_nop;
2811 frame->check = slf_check_nop;
1130 } 2812 }
1131 else 2813 else
2814 {
2815 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2816
2817 av_push (av, waiter);
2818
2819 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2820 frame->prepare = prepare_schedule;
2821 frame->check = slf_check_signal_wait;
2822 }
2823}
2824
2825/*****************************************************************************/
2826/* Coro::AIO */
2827
2828#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2829
2830/* helper storage struct */
2831struct io_state
2832{
2833 int errorno;
2834 I32 laststype; /* U16 in 5.10.0 */
2835 int laststatval;
2836 Stat_t statcache;
2837};
2838
2839static void
2840coro_aio_callback (pTHX_ CV *cv)
2841{
2842 dXSARGS;
2843 AV *state = (AV *)S_GENSUB_ARG;
2844 SV *coro = av_pop (state);
2845 SV *data_sv = newSV (sizeof (struct io_state));
2846
2847 av_extend (state, items - 1);
2848
2849 sv_upgrade (data_sv, SVt_PV);
2850 SvCUR_set (data_sv, sizeof (struct io_state));
2851 SvPOK_only (data_sv);
2852
2853 {
2854 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2855
2856 data->errorno = errno;
2857 data->laststype = PL_laststype;
2858 data->laststatval = PL_laststatval;
2859 data->statcache = PL_statcache;
2860 }
2861
2862 /* now build the result vector out of all the parameters and the data_sv */
2863 {
2864 int i;
2865
2866 for (i = 0; i < items; ++i)
2867 av_push (state, SvREFCNT_inc_NN (ST (i)));
2868 }
2869
2870 av_push (state, data_sv);
2871
2872 api_ready (aTHX_ coro);
2873 SvREFCNT_dec (coro);
2874 SvREFCNT_dec ((AV *)state);
2875}
2876
2877static int
2878slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2879{
2880 AV *state = (AV *)frame->data;
2881
2882 /* if we are about to throw, return early */
2883 /* this does not cancel the aio request, but at least */
2884 /* it quickly returns */
2885 if (CORO_THROW)
1132 return 0; 2886 return 0;
1133}
1134 2887
1135static void 2888 /* one element that is an RV? repeat! */
1136api_schedule (void) 2889 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1137{
1138 dTHX;
1139 struct transfer_args ta;
1140
1141 prepare_schedule (aTHX_ &ta);
1142 TRANSFER (ta);
1143}
1144
1145static int
1146api_cede (void)
1147{
1148 dTHX;
1149 struct transfer_args ta;
1150
1151 prepare_cede (aTHX_ &ta);
1152
1153 if (ta.prev != ta.next)
1154 {
1155 TRANSFER (ta);
1156 return 1; 2890 return 1;
2891
2892 /* restore status */
2893 {
2894 SV *data_sv = av_pop (state);
2895 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2896
2897 errno = data->errorno;
2898 PL_laststype = data->laststype;
2899 PL_laststatval = data->laststatval;
2900 PL_statcache = data->statcache;
2901
2902 SvREFCNT_dec (data_sv);
1157 } 2903 }
1158 else 2904
2905 /* push result values */
2906 {
2907 dSP;
2908 int i;
2909
2910 EXTEND (SP, AvFILLp (state) + 1);
2911 for (i = 0; i <= AvFILLp (state); ++i)
2912 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2913
2914 PUTBACK;
2915 }
2916
1159 return 0; 2917 return 0;
1160} 2918}
1161 2919
1162static int 2920static void
1163api_cede_notself (void) 2921slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1164{ 2922{
1165 dTHX; 2923 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1166 struct transfer_args ta; 2924 SV *coro_hv = SvRV (coro_current);
2925 struct coro *coro = SvSTATE_hv (coro_hv);
1167 2926
1168 if (prepare_cede_notself (aTHX_ &ta)) 2927 /* put our coroutine id on the state arg */
1169 { 2928 av_push (state, SvREFCNT_inc_NN (coro_hv));
1170 TRANSFER (ta); 2929
1171 return 1; 2930 /* first see whether we have a non-zero priority and set it as AIO prio */
2931 if (coro->prio)
1172 } 2932 {
1173 else 2933 dSP;
1174 return 0;
1175}
1176 2934
2935 static SV *prio_cv;
2936 static SV *prio_sv;
2937
2938 if (expect_false (!prio_cv))
2939 {
2940 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2941 prio_sv = newSViv (0);
2942 }
2943
2944 PUSHMARK (SP);
2945 sv_setiv (prio_sv, coro->prio);
2946 XPUSHs (prio_sv);
2947
2948 PUTBACK;
2949 call_sv (prio_cv, G_VOID | G_DISCARD);
2950 }
2951
2952 /* now call the original request */
2953 {
2954 dSP;
2955 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2956 int i;
2957
2958 PUSHMARK (SP);
2959
2960 /* first push all args to the stack */
2961 EXTEND (SP, items + 1);
2962
2963 for (i = 0; i < items; ++i)
2964 PUSHs (arg [i]);
2965
2966 /* now push the callback closure */
2967 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2968
2969 /* now call the AIO function - we assume our request is uncancelable */
2970 PUTBACK;
2971 call_sv ((SV *)req, G_VOID | G_DISCARD);
2972 }
2973
2974 /* now that the request is going, we loop till we have a result */
2975 frame->data = (void *)state;
2976 frame->prepare = prepare_schedule;
2977 frame->check = slf_check_aio_req;
2978}
2979
2980static void
2981coro_aio_req_xs (pTHX_ CV *cv)
2982{
2983 dXSARGS;
2984
2985 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2986
2987 XSRETURN_EMPTY;
2988}
2989
2990/*****************************************************************************/
2991
2992#if CORO_CLONE
2993# include "clone.c"
2994#endif
2995
2996/*****************************************************************************/
2997
2998static SV *
2999coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3000{
3001 SV *coro_sv;
3002 struct coro *coro;
3003 MAGIC *mg;
3004 HV *hv;
3005 SV *cb;
3006 int i;
3007
3008 if (argc > 0)
3009 {
3010 cb = s_get_cv_croak (argv [0]);
3011
3012 if (!is_coro)
3013 {
3014 if (CvISXSUB (cb))
3015 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3016
3017 if (!CvROOT (cb))
3018 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3019 }
3020 }
3021
3022 Newz (0, coro, 1, struct coro);
3023 coro->args = newAV ();
3024 coro->flags = CF_NEW;
3025
3026 if (coro_first) coro_first->prev = coro;
3027 coro->next = coro_first;
3028 coro_first = coro;
3029
3030 coro->hv = hv = newHV ();
3031 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3034
3035 if (argc > 0)
3036 {
3037 av_extend (coro->args, argc + is_coro - 1);
3038
3039 if (is_coro)
3040 {
3041 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3042 cb = (SV *)cv_coro_run;
3043 }
3044
3045 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3046
3047 for (i = 1; i < argc; i++)
3048 av_push (coro->args, newSVsv (argv [i]));
3049 }
3050
3051 return coro_sv;
3052}
3053
1177MODULE = Coro::State PACKAGE = Coro::State 3054MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1178 3055
1179PROTOTYPES: DISABLE 3056PROTOTYPES: DISABLE
1180 3057
1181BOOT: 3058BOOT:
1182{ 3059{
1183#ifdef USE_ITHREADS 3060#ifdef USE_ITHREADS
1184 MUTEX_INIT (&coro_mutex); 3061# if CORO_PTHREAD
3062 coro_thx = PERL_GET_CONTEXT;
3063# endif
1185#endif 3064#endif
1186 BOOT_PAGESIZE; 3065 BOOT_PAGESIZE;
1187 3066
3067 cctx_current = cctx_new_empty ();
3068
3069 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3070 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3071
3072 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3073 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3074 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3075
3076 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3077 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3078 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3079
1188 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3080 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1189 3081
1190 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3082 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1191 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3083 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1192 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1193 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1194 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1195 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3084 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1196 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3085 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1197 3086
1198 main_mainstack = PL_mainstack; 3087 main_mainstack = PL_mainstack;
1199 main_top_env = PL_top_env; 3088 main_top_env = PL_top_env;
1200 3089
1201 while (main_top_env->je_prev) 3090 while (main_top_env->je_prev)
1202 main_top_env = main_top_env->je_prev; 3091 main_top_env = main_top_env->je_prev;
1203 3092
3093 {
3094 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3095
3096 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3097 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3098
3099 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3100 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3101 }
3102
1204 coroapi.ver = CORO_API_VERSION; 3103 coroapi.ver = CORO_API_VERSION;
3104 coroapi.rev = CORO_API_REVISION;
3105
1205 coroapi.transfer = api_transfer; 3106 coroapi.transfer = api_transfer;
1206 3107
3108 coroapi.sv_state = SvSTATE_;
3109 coroapi.execute_slf = api_execute_slf;
3110 coroapi.prepare_nop = prepare_nop;
3111 coroapi.prepare_schedule = prepare_schedule;
3112 coroapi.prepare_cede = prepare_cede;
3113 coroapi.prepare_cede_notself = prepare_cede_notself;
3114
3115 {
3116 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3117
3118 if (!svp) croak ("Time::HiRes is required");
3119 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3120
3121 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3122
3123 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3124 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3125 }
3126
1207 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3127 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1208} 3128}
1209 3129
1210SV * 3130SV *
1211new (char *klass, ...) 3131new (SV *klass, ...)
3132 ALIAS:
3133 Coro::new = 1
1212 CODE: 3134 CODE:
1213{ 3135 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1214 struct coro *coro;
1215 HV *hv;
1216 int i;
1217
1218 Newz (0, coro, 1, struct coro);
1219 coro->args = newAV ();
1220 coro->save = CORO_SAVE_DEF;
1221 coro->flags = CF_NEW;
1222
1223 if (first) first->prev = coro;
1224 coro->next = first;
1225 first = coro;
1226
1227 coro->hv = hv = newHV ();
1228 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1229 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1230
1231 for (i = 1; i < items; i++)
1232 av_push (coro->args, newSVsv (ST (i)));
1233}
1234 OUTPUT:
1235 RETVAL
1236
1237int
1238save (SV *coro, int new_save = -1)
1239 CODE:
1240 RETVAL = api_save (coro, new_save);
1241 OUTPUT: 3136 OUTPUT:
1242 RETVAL 3137 RETVAL
1243 3138
1244int 3139void
1245save_also (SV *coro_sv, int save_also) 3140transfer (...)
3141 PROTOTYPE: $$
1246 CODE: 3142 CODE:
1247{ 3143 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1248 struct coro *coro = SvSTATE (coro_sv);
1249 RETVAL = coro->save;
1250 coro->save |= save_also;
1251}
1252 OUTPUT:
1253 RETVAL
1254
1255void
1256_set_stacklevel (...)
1257 ALIAS:
1258 Coro::State::transfer = 1
1259 Coro::schedule = 2
1260 Coro::cede = 3
1261 Coro::cede_notself = 4
1262 CODE:
1263{
1264 struct transfer_args ta;
1265
1266 switch (ix)
1267 {
1268 case 0:
1269 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1270 ta.next = 0;
1271 break;
1272
1273 case 1:
1274 if (items != 2)
1275 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1276
1277 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1278 break;
1279
1280 case 2:
1281 prepare_schedule (aTHX_ &ta);
1282 break;
1283
1284 case 3:
1285 prepare_cede (aTHX_ &ta);
1286 break;
1287
1288 case 4:
1289 if (!prepare_cede_notself (aTHX_ &ta))
1290 XSRETURN_EMPTY;
1291
1292 break;
1293 }
1294
1295 BARRIER;
1296 TRANSFER (ta);
1297
1298 if (GIMME_V != G_VOID && ta.next != ta.prev)
1299 XSRETURN_YES;
1300}
1301 3144
1302bool 3145bool
1303_destroy (SV *coro_sv) 3146_destroy (SV *coro_sv)
1304 CODE: 3147 CODE:
1305 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3148 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1306 OUTPUT: 3149 OUTPUT:
1307 RETVAL 3150 RETVAL
1308 3151
1309void 3152void
1310_exit (code) 3153_exit (int code)
1311 int code
1312 PROTOTYPE: $ 3154 PROTOTYPE: $
1313 CODE: 3155 CODE:
1314 _exit (code); 3156 _exit (code);
1315 3157
3158SV *
3159clone (Coro::State coro)
3160 CODE:
3161{
3162#if CORO_CLONE
3163 struct coro *ncoro = coro_clone (aTHX_ coro);
3164 MAGIC *mg;
3165 /* TODO: too much duplication */
3166 ncoro->hv = newHV ();
3167 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3168 mg->mg_flags |= MGf_DUP;
3169 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3170#else
3171 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3172#endif
3173}
3174 OUTPUT:
3175 RETVAL
3176
1316int 3177int
1317cctx_stacksize (int new_stacksize = 0) 3178cctx_stacksize (int new_stacksize = 0)
3179 PROTOTYPE: ;$
1318 CODE: 3180 CODE:
1319 RETVAL = coro_stacksize; 3181 RETVAL = cctx_stacksize;
1320 if (new_stacksize) 3182 if (new_stacksize)
3183 {
1321 coro_stacksize = new_stacksize; 3184 cctx_stacksize = new_stacksize;
3185 ++cctx_gen;
3186 }
1322 OUTPUT: 3187 OUTPUT:
1323 RETVAL 3188 RETVAL
1324 3189
1325int 3190int
3191cctx_max_idle (int max_idle = 0)
3192 PROTOTYPE: ;$
3193 CODE:
3194 RETVAL = cctx_max_idle;
3195 if (max_idle > 1)
3196 cctx_max_idle = max_idle;
3197 OUTPUT:
3198 RETVAL
3199
3200int
1326cctx_count () 3201cctx_count ()
3202 PROTOTYPE:
1327 CODE: 3203 CODE:
1328 RETVAL = cctx_count; 3204 RETVAL = cctx_count;
1329 OUTPUT: 3205 OUTPUT:
1330 RETVAL 3206 RETVAL
1331 3207
1332int 3208int
1333cctx_idle () 3209cctx_idle ()
3210 PROTOTYPE:
1334 CODE: 3211 CODE:
1335 RETVAL = cctx_idle; 3212 RETVAL = cctx_idle;
1336 OUTPUT: 3213 OUTPUT:
1337 RETVAL 3214 RETVAL
1338 3215
1339void 3216void
1340list () 3217list ()
3218 PROTOTYPE:
1341 PPCODE: 3219 PPCODE:
1342{ 3220{
1343 struct coro *coro; 3221 struct coro *coro;
1344 for (coro = first; coro; coro = coro->next) 3222 for (coro = coro_first; coro; coro = coro->next)
1345 if (coro->hv) 3223 if (coro->hv)
1346 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3224 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1347} 3225}
1348 3226
1349void 3227void
1350_eval (SV *coro_sv, SV *coderef) 3228call (Coro::State coro, SV *coderef)
3229 ALIAS:
3230 eval = 1
1351 CODE: 3231 CODE:
1352{ 3232{
1353 struct coro *coro = SvSTATE (coro_sv); 3233 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1354 if (coro->mainstack)
1355 { 3234 {
1356 struct coro temp; 3235 struct coro *current = SvSTATE_current;
1357 Zero (&temp, 1, struct coro);
1358 temp.save = CORO_SAVE_ALL;
1359 3236
1360 if (!(coro->flags & CF_RUNNING)) 3237 if (current != coro)
1361 { 3238 {
3239 PUTBACK;
1362 save_perl (aTHX_ &temp); 3240 save_perl (aTHX_ current);
1363 load_perl (aTHX_ coro); 3241 load_perl (aTHX_ coro);
3242 SPAGAIN;
1364 } 3243 }
1365 3244
1366 { 3245 PUSHSTACK;
1367 dSP; 3246
1368 ENTER;
1369 SAVETMPS;
1370 PUSHMARK (SP); 3247 PUSHMARK (SP);
1371 PUTBACK; 3248 PUTBACK;
3249
3250 if (ix)
3251 eval_sv (coderef, 0);
3252 else
1372 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3253 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3254
3255 POPSTACK;
1373 SPAGAIN; 3256 SPAGAIN;
1374 FREETMPS;
1375 LEAVE;
1376 PUTBACK;
1377 }
1378 3257
1379 if (!(coro->flags & CF_RUNNING)) 3258 if (current != coro)
1380 { 3259 {
3260 PUTBACK;
1381 save_perl (aTHX_ coro); 3261 save_perl (aTHX_ coro);
1382 load_perl (aTHX_ &temp); 3262 load_perl (aTHX_ current);
3263 SPAGAIN;
1383 } 3264 }
1384 } 3265 }
1385} 3266}
1386 3267
1387SV * 3268SV *
1388is_ready (SV *coro_sv) 3269is_ready (Coro::State coro)
1389 PROTOTYPE: $ 3270 PROTOTYPE: $
1390 ALIAS: 3271 ALIAS:
1391 is_ready = CF_READY 3272 is_ready = CF_READY
1392 is_running = CF_RUNNING 3273 is_running = CF_RUNNING
1393 is_new = CF_NEW 3274 is_new = CF_NEW
1394 is_destroyed = CF_DESTROYED 3275 is_destroyed = CF_DESTROYED
3276 is_suspended = CF_SUSPENDED
1395 CODE: 3277 CODE:
1396 struct coro *coro = SvSTATE (coro_sv);
1397 RETVAL = boolSV (coro->flags & ix); 3278 RETVAL = boolSV (coro->flags & ix);
1398 OUTPUT: 3279 OUTPUT:
1399 RETVAL 3280 RETVAL
1400 3281
3282void
3283throw (Coro::State self, SV *exception = &PL_sv_undef)
3284 PROTOTYPE: $;$
3285 CODE:
3286{
3287 struct coro *current = SvSTATE_current;
3288 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3289 SvREFCNT_dec (*exceptionp);
3290 SvGETMAGIC (exception);
3291 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3292}
3293
3294void
3295api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3296 PROTOTYPE: $;$
3297 C_ARGS: aTHX_ coro, flags
3298
3299SV *
3300has_cctx (Coro::State coro)
3301 PROTOTYPE: $
3302 CODE:
3303 /* maybe manage the running flag differently */
3304 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3305 OUTPUT:
3306 RETVAL
3307
3308int
3309is_traced (Coro::State coro)
3310 PROTOTYPE: $
3311 CODE:
3312 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3313 OUTPUT:
3314 RETVAL
3315
3316UV
3317rss (Coro::State coro)
3318 PROTOTYPE: $
3319 ALIAS:
3320 usecount = 1
3321 CODE:
3322 switch (ix)
3323 {
3324 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3325 case 1: RETVAL = coro->usecount; break;
3326 }
3327 OUTPUT:
3328 RETVAL
3329
3330void
3331force_cctx ()
3332 PROTOTYPE:
3333 CODE:
3334 cctx_current->idle_sp = 0;
3335
3336void
3337swap_defsv (Coro::State self)
3338 PROTOTYPE: $
3339 ALIAS:
3340 swap_defav = 1
3341 CODE:
3342 if (!self->slot)
3343 croak ("cannot swap state with coroutine that has no saved state,");
3344 else
3345 {
3346 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3347 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3348
3349 SV *tmp = *src; *src = *dst; *dst = tmp;
3350 }
3351
3352void
3353cancel (Coro::State self)
3354 CODE:
3355 coro_state_destroy (aTHX_ self);
3356 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3357
3358
3359SV *
3360enable_times (int enabled = enable_times)
3361 CODE:
3362{
3363 RETVAL = boolSV (enable_times);
3364
3365 if (enabled != enable_times)
3366 {
3367 enable_times = enabled;
3368
3369 coro_times_update ();
3370 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3371 }
3372}
3373 OUTPUT:
3374 RETVAL
3375
3376void
3377times (Coro::State self)
3378 PPCODE:
3379{
3380 struct coro *current = SvSTATE (coro_current);
3381
3382 if (expect_false (current == self))
3383 {
3384 coro_times_update ();
3385 coro_times_add (SvSTATE (coro_current));
3386 }
3387
3388 EXTEND (SP, 2);
3389 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3390 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3391
3392 if (expect_false (current == self))
3393 coro_times_sub (SvSTATE (coro_current));
3394}
3395
3396void
3397swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3398 CODE:
3399{
3400 struct coro *current = SvSTATE_current;
3401
3402 if (current == coro)
3403 SWAP_SVS (current);
3404
3405 if (!coro->swap_sv)
3406 coro->swap_sv = newAV ();
3407
3408 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3409 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3410
3411 if (current == coro)
3412 SWAP_SVS (current);
3413}
3414
1401 3415
1402MODULE = Coro::State PACKAGE = Coro 3416MODULE = Coro::State PACKAGE = Coro
1403 3417
1404BOOT: 3418BOOT:
1405{ 3419{
1406 int i; 3420 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3421 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3422 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3423 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3424 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3425 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3426 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3427 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3428 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1407 3429
3430 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3431 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3432 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3433 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3434
1408 coro_stash = gv_stashpv ("Coro", TRUE); 3435 coro_stash = gv_stashpv ("Coro", TRUE);
1409 3436
1410 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3437 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1411 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3438 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1412 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3439 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1413 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3440 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1414 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3441 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1415 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3442 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1416
1417 coro_current = get_sv ("Coro::current", FALSE);
1418 SvREADONLY_on (coro_current);
1419
1420 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1421 coro_ready[i] = newAV ();
1422 3443
1423 { 3444 {
1424 SV *sv = perl_get_sv("Coro::API", 1); 3445 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1425 3446
1426 coroapi.schedule = api_schedule; 3447 coroapi.schedule = api_schedule;
1427 coroapi.save = api_save; 3448 coroapi.schedule_to = api_schedule_to;
1428 coroapi.cede = api_cede; 3449 coroapi.cede = api_cede;
1429 coroapi.cede_notself = api_cede_notself; 3450 coroapi.cede_notself = api_cede_notself;
1430 coroapi.ready = api_ready; 3451 coroapi.ready = api_ready;
1431 coroapi.is_ready = api_is_ready; 3452 coroapi.is_ready = api_is_ready;
1432 coroapi.nready = &coro_nready; 3453 coroapi.nready = coro_nready;
1433 coroapi.current = coro_current; 3454 coroapi.current = coro_current;
1434 3455
1435 GCoroAPI = &coroapi; 3456 /*GCoroAPI = &coroapi;*/
1436 sv_setiv (sv, (IV)&coroapi); 3457 sv_setiv (sv, (IV)&coroapi);
1437 SvREADONLY_on (sv); 3458 SvREADONLY_on (sv);
1438 } 3459 }
1439} 3460}
3461
3462SV *
3463async (...)
3464 PROTOTYPE: &@
3465 CODE:
3466 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3467 api_ready (aTHX_ RETVAL);
3468 OUTPUT:
3469 RETVAL
3470
3471void
3472terminate (...)
3473 CODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3475
3476void
3477schedule (...)
3478 CODE:
3479 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3480
3481void
3482schedule_to (...)
3483 CODE:
3484 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3485
3486void
3487cede_to (...)
3488 CODE:
3489 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3490
3491void
3492cede (...)
3493 CODE:
3494 CORO_EXECUTE_SLF_XS (slf_init_cede);
3495
3496void
3497cede_notself (...)
3498 CODE:
3499 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1440 3500
1441void 3501void
1442_set_current (SV *current) 3502_set_current (SV *current)
1443 PROTOTYPE: $ 3503 PROTOTYPE: $
1444 CODE: 3504 CODE:
1445 SvREFCNT_dec (SvRV (coro_current)); 3505 SvREFCNT_dec (SvRV (coro_current));
1446 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3506 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3507
3508void
3509_set_readyhook (SV *hook)
3510 PROTOTYPE: $
3511 CODE:
3512 SvREFCNT_dec (coro_readyhook);
3513 SvGETMAGIC (hook);
3514 if (SvOK (hook))
3515 {
3516 coro_readyhook = newSVsv (hook);
3517 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3518 }
3519 else
3520 {
3521 coro_readyhook = 0;
3522 CORO_READYHOOK = 0;
3523 }
1447 3524
1448int 3525int
1449prio (Coro::State coro, int newprio = 0) 3526prio (Coro::State coro, int newprio = 0)
3527 PROTOTYPE: $;$
1450 ALIAS: 3528 ALIAS:
1451 nice = 1 3529 nice = 1
1452 CODE: 3530 CODE:
1453{ 3531{
1454 RETVAL = coro->prio; 3532 RETVAL = coro->prio;
… …
1456 if (items > 1) 3534 if (items > 1)
1457 { 3535 {
1458 if (ix) 3536 if (ix)
1459 newprio = coro->prio - newprio; 3537 newprio = coro->prio - newprio;
1460 3538
1461 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3539 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1462 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3540 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1463 3541
1464 coro->prio = newprio; 3542 coro->prio = newprio;
1465 } 3543 }
1466} 3544}
1467 OUTPUT: 3545 OUTPUT:
… …
1469 3547
1470SV * 3548SV *
1471ready (SV *self) 3549ready (SV *self)
1472 PROTOTYPE: $ 3550 PROTOTYPE: $
1473 CODE: 3551 CODE:
1474 RETVAL = boolSV (api_ready (self)); 3552 RETVAL = boolSV (api_ready (aTHX_ self));
1475 OUTPUT: 3553 OUTPUT:
1476 RETVAL 3554 RETVAL
1477 3555
1478int 3556int
1479nready (...) 3557nready (...)
… …
1481 CODE: 3559 CODE:
1482 RETVAL = coro_nready; 3560 RETVAL = coro_nready;
1483 OUTPUT: 3561 OUTPUT:
1484 RETVAL 3562 RETVAL
1485 3563
1486MODULE = Coro::State PACKAGE = Coro::AIO 3564void
3565suspend (Coro::State self)
3566 PROTOTYPE: $
3567 CODE:
3568 self->flags |= CF_SUSPENDED;
3569
3570void
3571resume (Coro::State self)
3572 PROTOTYPE: $
3573 CODE:
3574 self->flags &= ~CF_SUSPENDED;
3575
3576void
3577_pool_handler (...)
3578 CODE:
3579 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3580
3581void
3582async_pool (SV *cv, ...)
3583 PROTOTYPE: &@
3584 PPCODE:
3585{
3586 HV *hv = (HV *)av_pop (av_async_pool);
3587 AV *av = newAV ();
3588 SV *cb = ST (0);
3589 int i;
3590
3591 av_extend (av, items - 2);
3592 for (i = 1; i < items; ++i)
3593 av_push (av, SvREFCNT_inc_NN (ST (i)));
3594
3595 if ((SV *)hv == &PL_sv_undef)
3596 {
3597 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3598 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3599 SvREFCNT_dec (sv);
3600 }
3601
3602 {
3603 struct coro *coro = SvSTATE_hv (hv);
3604
3605 assert (!coro->invoke_cb);
3606 assert (!coro->invoke_av);
3607 coro->invoke_cb = SvREFCNT_inc (cb);
3608 coro->invoke_av = av;
3609 }
3610
3611 api_ready (aTHX_ (SV *)hv);
3612
3613 if (GIMME_V != G_VOID)
3614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3615 else
3616 SvREFCNT_dec (hv);
3617}
1487 3618
1488SV * 3619SV *
1489_get_state () 3620rouse_cb ()
3621 PROTOTYPE:
1490 CODE: 3622 CODE:
1491{ 3623 RETVAL = coro_new_rouse_cb (aTHX);
1492 struct io_state *data;
1493
1494 RETVAL = newSV (sizeof (struct io_state));
1495 data = (struct io_state *)SvPVX (RETVAL);
1496 SvCUR_set (RETVAL, sizeof (struct io_state));
1497 SvPOK_only (RETVAL);
1498
1499 data->errorno = errno;
1500 data->laststype = PL_laststype;
1501 data->laststatval = PL_laststatval;
1502 data->statcache = PL_statcache;
1503}
1504 OUTPUT: 3624 OUTPUT:
1505 RETVAL 3625 RETVAL
1506 3626
1507void 3627void
1508_set_state (char *data_) 3628rouse_wait (...)
3629 PROTOTYPE: ;$
3630 PPCODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3632
3633void
3634on_enter (SV *block)
3635 ALIAS:
3636 on_leave = 1
1509 PROTOTYPE: $ 3637 PROTOTYPE: &
1510 CODE: 3638 CODE:
1511{ 3639{
1512 struct io_state *data = (void *)data_; 3640 struct coro *coro = SvSTATE_current;
3641 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1513 3642
1514 errno = data->errorno; 3643 block = s_get_cv_croak (block);
1515 PL_laststype = data->laststype;
1516 PL_laststatval = data->laststatval;
1517 PL_statcache = data->statcache;
1518}
1519 3644
3645 if (!*avp)
3646 *avp = newAV ();
3647
3648 av_push (*avp, SvREFCNT_inc (block));
3649
3650 if (!ix)
3651 on_enterleave_call (aTHX_ block);
3652
3653 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3654 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3655 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3656}
3657
3658
3659MODULE = Coro::State PACKAGE = PerlIO::cede
3660
3661BOOT:
3662 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3663
3664
3665MODULE = Coro::State PACKAGE = Coro::Semaphore
3666
3667SV *
3668new (SV *klass, SV *count = 0)
3669 CODE:
3670{
3671 int semcnt = 1;
3672
3673 if (count)
3674 {
3675 SvGETMAGIC (count);
3676
3677 if (SvOK (count))
3678 semcnt = SvIV (count);
3679 }
3680
3681 RETVAL = sv_bless (
3682 coro_waitarray_new (aTHX_ semcnt),
3683 GvSTASH (CvGV (cv))
3684 );
3685}
3686 OUTPUT:
3687 RETVAL
3688
3689# helper for Coro::Channel and others
3690SV *
3691_alloc (int count)
3692 CODE:
3693 RETVAL = coro_waitarray_new (aTHX_ count);
3694 OUTPUT:
3695 RETVAL
3696
3697SV *
3698count (SV *self)
3699 CODE:
3700 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3701 OUTPUT:
3702 RETVAL
3703
3704void
3705up (SV *self, int adjust = 1)
3706 ALIAS:
3707 adjust = 1
3708 CODE:
3709 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3710
3711void
3712down (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3715
3716void
3717wait (...)
3718 CODE:
3719 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3720
3721void
3722try (SV *self)
3723 PPCODE:
3724{
3725 AV *av = (AV *)SvRV (self);
3726 SV *count_sv = AvARRAY (av)[0];
3727 IV count = SvIVX (count_sv);
3728
3729 if (count > 0)
3730 {
3731 --count;
3732 SvIVX (count_sv) = count;
3733 XSRETURN_YES;
3734 }
3735 else
3736 XSRETURN_NO;
3737}
3738
3739void
3740waiters (SV *self)
3741 PPCODE:
3742{
3743 AV *av = (AV *)SvRV (self);
3744 int wcount = AvFILLp (av) + 1 - 1;
3745
3746 if (GIMME_V == G_SCALAR)
3747 XPUSHs (sv_2mortal (newSViv (wcount)));
3748 else
3749 {
3750 int i;
3751 EXTEND (SP, wcount);
3752 for (i = 1; i <= wcount; ++i)
3753 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3754 }
3755}
3756
3757MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3758
3759void
3760_may_delete (SV *sem, int count, int extra_refs)
3761 PPCODE:
3762{
3763 AV *av = (AV *)SvRV (sem);
3764
3765 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3766 && AvFILLp (av) == 0 /* no waiters, just count */
3767 && SvIV (AvARRAY (av)[0]) == count)
3768 XSRETURN_YES;
3769
3770 XSRETURN_NO;
3771}
3772
3773MODULE = Coro::State PACKAGE = Coro::Signal
3774
3775SV *
3776new (SV *klass)
3777 CODE:
3778 RETVAL = sv_bless (
3779 coro_waitarray_new (aTHX_ 0),
3780 GvSTASH (CvGV (cv))
3781 );
3782 OUTPUT:
3783 RETVAL
3784
3785void
3786wait (...)
3787 CODE:
3788 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3789
3790void
3791broadcast (SV *self)
3792 CODE:
3793{
3794 AV *av = (AV *)SvRV (self);
3795 coro_signal_wake (aTHX_ av, AvFILLp (av));
3796}
3797
3798void
3799send (SV *self)
3800 CODE:
3801{
3802 AV *av = (AV *)SvRV (self);
3803
3804 if (AvFILLp (av))
3805 coro_signal_wake (aTHX_ av, 1);
3806 else
3807 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3808}
3809
3810IV
3811awaited (SV *self)
3812 CODE:
3813 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3814 OUTPUT:
3815 RETVAL
3816
3817
3818MODULE = Coro::State PACKAGE = Coro::AnyEvent
3819
3820BOOT:
3821 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3822
3823void
3824_schedule (...)
3825 CODE:
3826{
3827 static int incede;
3828
3829 api_cede_notself (aTHX);
3830
3831 ++incede;
3832 while (coro_nready >= incede && api_cede (aTHX))
3833 ;
3834
3835 sv_setsv (sv_activity, &PL_sv_undef);
3836 if (coro_nready >= incede)
3837 {
3838 PUSHMARK (SP);
3839 PUTBACK;
3840 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3841 }
3842
3843 --incede;
3844}
3845
3846
3847MODULE = Coro::State PACKAGE = Coro::AIO
3848
3849void
3850_register (char *target, char *proto, SV *req)
3851 CODE:
3852{
3853 SV *req_cv = s_get_cv_croak (req);
3854 /* newXSproto doesn't return the CV on 5.8 */
3855 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3856 sv_setpv ((SV *)slf_cv, proto);
3857 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3858}
3859
3860MODULE = Coro::State PACKAGE = Coro::Select
3861
3862void
3863patch_pp_sselect ()
3864 CODE:
3865 if (!coro_old_pp_sselect)
3866 {
3867 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3868 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3869 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3870 }
3871
3872void
3873unpatch_pp_sselect ()
3874 CODE:
3875 if (coro_old_pp_sselect)
3876 {
3877 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3878 coro_old_pp_sselect = 0;
3879 }
3880
3881

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