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Comparing Coro/Coro/State.xs (file contents):
Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC vs.
Revision 1.277 by root, Sat Nov 15 18:40:55 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# 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 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
75/* 5.8.7 */ 101/* 5.8.7 */
76#ifndef SvRV_set 102#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 104#endif
79 105
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD 107# undef CORO_STACKGUARD
90#endif 108#endif
91 109
92#ifndef CORO_STACKGUARD 110#ifndef CORO_STACKGUARD
… …
98# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif 117#endif
100 118
101/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */ 120 * portable way as possible. */
103#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
104#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
105 126
106#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
107 128
108#if __GNUC__ >= 3 129#if __GNUC__ >= 3
109# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
110# define BARRIER __asm__ __volatile__ ("" : : : "memory")
111# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
112#else 133#else
113# define attribute(x) 134# define attribute(x)
114# define BARRIER
115# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
116#endif 137#endif
117 138
118#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
119#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
120 141
121#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
122 143
123#include "CoroAPI.h" 144#include "CoroAPI.h"
124 145
125#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
126static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
127# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
128# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
129#else 155#else
156
130# define LOCK (void)0 157# define LOCK (void)0
131# define UNLOCK (void)0 158# define UNLOCK (void)0
159
132#endif 160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
133 166
134/* helper storage struct for Coro::AIO */ 167/* helper storage struct for Coro::AIO */
135struct io_state 168struct io_state
136{ 169{
170 AV *res;
137 int errorno; 171 int errorno;
138 I32 laststype; 172 I32 laststype; /* U16 in 5.10.0 */
139 int laststatval; 173 int laststatval;
140 Stat_t statcache; 174 Stat_t statcache;
141}; 175};
142 176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
143static size_t coro_stacksize = CORO_STACKSIZE; 180static size_t cctx_stacksize = CORO_STACKSIZE;
144static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
145static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
146static JMPENV *main_top_env; 183static JMPENV *main_top_env;
147static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
148static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
149 187
150static GV *irsgv; /* $/ */ 188static GV *irsgv; /* $/ */
151static GV *stdoutgv; /* *STDOUT */ 189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
152 193
153/* async_pool helper stuff */ 194/* async_pool helper stuff */
154static SV *sv_pool_rss; 195static SV *sv_pool_rss;
155static SV *sv_pool_size; 196static SV *sv_pool_size;
156static AV *av_async_pool; 197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
157 201
158static struct coro_cctx *cctx_first; 202static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle; 203static int cctx_count, cctx_idle;
160 204
161enum { 205enum {
… …
166 CC_TRACE_LINE = 0x10, /* trace each statement */ 210 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168}; 212};
169 213
170/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
171typedef struct coro_cctx { 215typedef struct coro_cctx
216{
172 struct coro_cctx *next; 217 struct coro_cctx *next;
173 218
174 /* the stack */ 219 /* the stack */
175 void *sptr; 220 void *sptr;
176 size_t ssize; 221 size_t ssize;
… …
179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
181 JMPENV *top_env; 226 JMPENV *top_env;
182 coro_context cctx; 227 coro_context cctx;
183 228
229 U32 gen;
184#if CORO_USE_VALGRIND 230#if CORO_USE_VALGRIND
185 int valgrind_id; 231 int valgrind_id;
186#endif 232#endif
187 unsigned char flags; 233 unsigned char flags;
188} coro_cctx; 234} coro_cctx;
… …
192 CF_READY = 0x0002, /* coroutine is ready */ 238 CF_READY = 0x0002, /* coroutine is ready */
193 CF_NEW = 0x0004, /* has never been switched to */ 239 CF_NEW = 0x0004, /* has never been switched to */
194 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
195}; 241};
196 242
197/* this is a structure representing a perl-level coroutine */ 243/* the structure where most of the perl state is stored, overlaid on the cxstack */
198struct coro { 244typedef struct
199 /* the c coroutine allocated to this perl coroutine, if any */ 245{
200 coro_cctx *cctx; 246 SV *defsv;
201 247 AV *defav;
202 /* data associated with this coroutine (initial args) */ 248 SV *errsv;
203 AV *args; 249 SV *irsgv;
204 int refcnt;
205 int flags; /* CF_ flags */
206
207 /* optionally saved, might be zero */
208 AV *defav; /* @_ */
209 SV *defsv; /* $_ */
210 SV *errsv; /* $@ */
211 SV *deffh; /* default filehandle */
212 SV *irssv; /* $/ */
213 SV *irssv_sv; /* real $/ cache */
214
215#define VAR(name,type) type name; 250#define VAR(name,type) type name;
216# include "state.h" 251# include "state.h"
217#undef VAR 252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is a structure representing a perl-level coroutine */
258struct coro {
259 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx;
261
262 /* process data */
263 struct CoroSLF slf_frame; /* saved slf frame */
264 AV *mainstack;
265 perl_slots *slot; /* basically the saved sp */
266
267 AV *args; /* data associated with this coroutine (initial args) */
268 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */
218 271
219 /* statistics */ 272 /* statistics */
220 int usecount; /* number of transfers to this coro */ 273 int usecount; /* number of transfers to this coro */
221 274
222 /* coro process data */ 275 /* coro process data */
223 int prio; 276 int prio;
224 //SV *throw; 277 SV *throw; /* exception to be thrown */
225 278
226 /* async_pool */ 279 /* async_pool */
227 SV *saved_deffh; 280 SV *saved_deffh;
228 281
229 /* linked list */ 282 /* linked list */
230 struct coro *next, *prev; 283 struct coro *next, *prev;
231 HV *hv; /* the perl hash associated with this coro, if any */
232}; 284};
233 285
234typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
235typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
288
289static struct CoroSLF slf_frame; /* the current slf frame */
236 290
237/** Coro ********************************************************************/ 291/** Coro ********************************************************************/
238 292
239#define PRIO_MAX 3 293#define PRIO_MAX 3
240#define PRIO_HIGH 1 294#define PRIO_HIGH 1
… …
243#define PRIO_IDLE -3 297#define PRIO_IDLE -3
244#define PRIO_MIN -4 298#define PRIO_MIN -4
245 299
246/* for Coro.pm */ 300/* for Coro.pm */
247static SV *coro_current; 301static SV *coro_current;
302static SV *coro_readyhook;
248static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
249static int coro_nready;
250static struct coro *coro_first; 304static struct coro *coro_first;
305#define coro_nready coroapi.nready
251 306
252/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
253 338
254static AV * 339static AV *
255coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
256{ 341{
257 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
258 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
259 344
260 newpadlist = newAV (); 345 newpadlist = newAV ();
261 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
262#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
263 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
264#else 349#else
265 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
266#endif 351#endif
267 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
268 --AvFILLp (padlist); 353 --AvFILLp (padlist);
269 354
270 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
271 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
272 357
273 return newpadlist; 358 return newpadlist;
274} 359}
275 360
… …
305 390
306 /* casting is fun. */ 391 /* casting is fun. */
307 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
308 free_padlist (aTHX_ padlist); 393 free_padlist (aTHX_ padlist);
309 394
310 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
311 396
312 return 0; 397 return 0;
313} 398}
314 399
315#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
316 402
317static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
318 407
319#define CORO_MAGIC(cv) \ 408#define CORO_MAGIC(sv, type) \
320 SvMAGIC (cv) \ 409 SvMAGIC (sv) \
321 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 410 ? SvMAGIC (sv)->mg_type == type \
322 ? SvMAGIC (cv) \ 411 ? SvMAGIC (sv) \
323 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 412 : mg_find (sv, type) \
324 : 0 413 : 0
325 414
326static struct coro * 415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
327SvSTATE_ (pTHX_ SV *coro) 419SvSTATE_ (pTHX_ SV *coro)
328{ 420{
329 HV *stash; 421 HV *stash;
330 MAGIC *mg; 422 MAGIC *mg;
331 423
… …
341 /* very slow, but rare, check */ 433 /* very slow, but rare, check */
342 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
343 croak ("Coro::State object required"); 435 croak ("Coro::State object required");
344 } 436 }
345 437
346 mg = CORO_MAGIC (coro); 438 mg = CORO_MAGIC_state (coro);
347 return (struct coro *)mg->mg_ptr; 439 return (struct coro *)mg->mg_ptr;
348} 440}
349 441
350#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
351 443
352/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
353static void 445static void
354get_padlist (pTHX_ CV *cv) 446get_padlist (pTHX_ CV *cv)
355{ 447{
356 MAGIC *mg = CORO_MAGIC (cv); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
357 AV *av; 449 AV *av;
358 450
359 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
360 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
361 else 453 else
362 { 454 {
363#if CORO_PREFER_PERL_FUNCTIONS 455#if CORO_PREFER_PERL_FUNCTIONS
364 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
365 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
366 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
367 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
368 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
369#else 462#else
… …
373} 466}
374 467
375static void 468static void
376put_padlist (pTHX_ CV *cv) 469put_padlist (pTHX_ CV *cv)
377{ 470{
378 MAGIC *mg = CORO_MAGIC (cv); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
379 AV *av; 472 AV *av;
380 473
381 if (expect_false (!mg)) 474 if (expect_false (!mg))
382 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
383 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
384 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
385 mg->mg_virtual = &vtbl_coro;
386 mg->mg_obj = (SV *)newAV ();
387 }
388 476
389 av = (AV *)mg->mg_obj; 477 av = (AV *)mg->mg_obj;
390 478
391 if (expect_false (AvFILLp (av) >= AvMAX (av))) 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
392 av_extend (av, AvMAX (av) + 1); 480 av_extend (av, AvMAX (av) + 1);
… …
397/** load & save, init *******************************************************/ 485/** load & save, init *******************************************************/
398 486
399static void 487static void
400load_perl (pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
401{ 489{
490 perl_slots *slot = c->slot;
491 c->slot = 0;
492
493 PL_mainstack = c->mainstack;
494
495 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
402#define VAR(name,type) PL_ ## name = c->name; 500 #define VAR(name,type) PL_ ## name = slot->name;
403# include "state.h" 501 # include "state.h"
404#undef VAR 502 #undef VAR
405
406 GvSV (PL_defgv) = c->defsv;
407 GvAV (PL_defgv) = c->defav;
408 GvSV (PL_errgv) = c->errsv;
409 GvSV (irsgv) = c->irssv_sv;
410 503
411 { 504 {
412 dSP; 505 dSP;
506
413 CV *cv; 507 CV *cv;
414 508
415 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
416 while (expect_true (cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
417 { 511 {
… …
420 CvPADLIST (cv) = (AV *)POPs; 514 CvPADLIST (cv) = (AV *)POPs;
421 } 515 }
422 516
423 PUTBACK; 517 PUTBACK;
424 } 518 }
519
520 slf_frame = c->slf_frame;
425} 521}
426 522
427static void 523static void
428save_perl (pTHX_ Coro__State c) 524save_perl (pTHX_ Coro__State c)
429{ 525{
526 c->slf_frame = slf_frame;
527
430 { 528 {
431 dSP; 529 dSP;
432 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
433 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
434 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
452 550
453 if (expect_true (CvDEPTH (cv))) 551 if (expect_true (CvDEPTH (cv)))
454 { 552 {
455 EXTEND (SP, 3); 553 EXTEND (SP, 3);
456 PUSHs ((SV *)CvPADLIST (cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
457 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
458 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
459 557
460 CvDEPTH (cv) = 0; 558 CvDEPTH (cv) = 0;
461 get_padlist (aTHX_ cv); 559 get_padlist (aTHX_ cv);
462 } 560 }
… …
472 } 570 }
473 571
474 PUTBACK; 572 PUTBACK;
475 } 573 }
476 574
575 /* allocate some space on the context stack for our purposes */
576 /* we manually unroll here, as usually 2 slots is enough */
577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
586
587 c->mainstack = PL_mainstack;
588
589 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591
477 c->defav = GvAV (PL_defgv); 592 slot->defav = GvAV (PL_defgv);
478 c->defsv = DEFSV; 593 slot->defsv = DEFSV;
479 c->errsv = ERRSV; 594 slot->errsv = ERRSV;
480 c->irssv_sv = GvSV (irsgv); 595 slot->irsgv = GvSV (irsgv);
481 596
482#define VAR(name,type)c->name = PL_ ## name; 597 #define VAR(name,type) slot->name = PL_ ## name;
483# include "state.h" 598 # include "state.h"
484#undef VAR 599 #undef VAR
600 }
485} 601}
486 602
487/* 603/*
488 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
489 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
490 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
491 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
492 */ 608 */
493#if CORO_PREFER_PERL_FUNCTIONS 609#if CORO_PREFER_PERL_FUNCTIONS
494# define coro_init_stacks init_stacks 610# define coro_init_stacks init_stacks
495#else 611#else
496static void 612static void
497coro_init_stacks (pTHX) 613coro_init_stacks (pTHX)
498{ 614{
499 PL_curstackinfo = new_stackinfo(64, 6); 615 PL_curstackinfo = new_stackinfo(32, 8);
500 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 619
504 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 623
508 New(50,PL_tmps_stack,64,SV*); 624 New(50,PL_tmps_stack,32,SV*);
509 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
511 PL_tmps_max = 64; 627 PL_tmps_max = 32;
512 628
513 New(54,PL_markstack,16,I32); 629 New(54,PL_markstack,16,I32);
514 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 631 PL_markstack_max = PL_markstack + 16;
516 632
517#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
519#endif 635#endif
520 636
521 New(54,PL_scopestack,16,I32); 637 New(54,PL_scopestack,8,I32);
522 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 639 PL_scopestack_max = 8;
524 640
525 New(54,PL_savestack,64,ANY); 641 New(54,PL_savestack,24,ANY);
526 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
527 PL_savestack_max = 64; 643 PL_savestack_max = 24;
528 644
529#if !PERL_VERSION_ATLEAST (5,9,0) 645#if !PERL_VERSION_ATLEAST (5,10,0)
530 New(54,PL_retstack,4,OP*); 646 New(54,PL_retstack,4,OP*);
531 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
532 PL_retstack_max = 4; 648 PL_retstack_max = 4;
533#endif 649#endif
534} 650}
… …
536 652
537/* 653/*
538 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
539 */ 655 */
540static void 656static void
541coro_destroy_stacks (pTHX) 657coro_destruct_stacks (pTHX)
542{ 658{
543 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
544 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
545 661
546 while (PL_curstackinfo) 662 while (PL_curstackinfo)
… …
557 673
558 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
559 Safefree (PL_markstack); 675 Safefree (PL_markstack);
560 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
561 Safefree (PL_savestack); 677 Safefree (PL_savestack);
562#if !PERL_VERSION_ATLEAST (5,9,0) 678#if !PERL_VERSION_ATLEAST (5,10,0)
563 Safefree (PL_retstack); 679 Safefree (PL_retstack);
564#endif 680#endif
565} 681}
566 682
567static size_t 683static size_t
… …
569{ 685{
570 size_t rss = sizeof (*coro); 686 size_t rss = sizeof (*coro);
571 687
572 if (coro->mainstack) 688 if (coro->mainstack)
573 { 689 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
574 if (coro->flags & CF_RUNNING) 693 if (coro->flags & CF_RUNNING)
575 { 694 {
695 slot = &tmp_slot;
696
576 #define VAR(name,type)coro->name = PL_ ## name; 697 #define VAR(name,type) slot->name = PL_ ## name;
577 # include "state.h" 698 # include "state.h"
578 #undef VAR 699 #undef VAR
579 } 700 }
701 else
702 slot = coro->slot;
580 703
704 if (slot)
705 {
581 rss += sizeof (coro->curstackinfo); 706 rss += sizeof (slot->curstackinfo);
582 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
583 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
584 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
585 rss += coro->tmps_max * sizeof (SV *); 709 rss += slot->tmps_max * sizeof (SV *);
586 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
587 rss += coro->scopestack_max * sizeof (I32); 711 rss += slot->scopestack_max * sizeof (I32);
588 rss += coro->savestack_max * sizeof (ANY); 712 rss += slot->savestack_max * sizeof (ANY);
589 713
590#if !PERL_VERSION_ATLEAST (5,9,0) 714#if !PERL_VERSION_ATLEAST (5,10,0)
591 rss += coro->retstack_max * sizeof (OP *); 715 rss += slot->retstack_max * sizeof (OP *);
592#endif 716#endif
717 }
593 } 718 }
594 719
595 return rss; 720 return rss;
596} 721}
597 722
598/** coroutine stack handling ************************************************/ 723/** coroutine stack handling ************************************************/
724
725static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
727static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
728
729/* apparently < 5.8.8 */
730#ifndef MgPV_nolen_const
731#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
732 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
733 (const char*)(mg)->mg_ptr)
734#endif
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
745static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816prepare_nop (pTHX_ struct coro_transfer_args *ta)
817{
818 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta;
820}
821
822static int
823slf_check_nop (pTHX_ struct CoroSLF *frame)
824{
825 return 0;
826}
599 827
600static void 828static void
601coro_setup (pTHX_ struct coro *coro) 829coro_setup (pTHX_ struct coro *coro)
602{ 830{
603 /* 831 /*
… …
608 PL_runops = RUNOPS_DEFAULT; 836 PL_runops = RUNOPS_DEFAULT;
609 PL_curcop = &PL_compiling; 837 PL_curcop = &PL_compiling;
610 PL_in_eval = EVAL_NULL; 838 PL_in_eval = EVAL_NULL;
611 PL_comppad = 0; 839 PL_comppad = 0;
612 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
613 PL_localizing = 0; 842 PL_localizing = 0;
614 PL_dirty = 0; 843 PL_dirty = 0;
615 PL_restartop = 0; 844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
616 852
617 GvSV (PL_defgv) = newSV (0); 853 GvSV (PL_defgv) = newSV (0);
618 GvAV (PL_defgv) = coro->args; coro->args = 0; 854 GvAV (PL_defgv) = coro->args; coro->args = 0;
619 GvSV (PL_errgv) = newSV (0); 855 GvSV (PL_errgv) = newSV (0);
620 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
621 PL_rs = newSVsv (GvSV (irsgv)); 857 PL_rs = newSVsv (GvSV (irsgv));
622 PL_defoutgv = SvREFCNT_inc (stdoutgv); 858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
623
624 ENTER; /* necessary e.g. for dounwind */
625 859
626 { 860 {
627 dSP; 861 dSP;
628 LOGOP myop; 862 UNOP myop;
629 863
630 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
631 myop.op_next = Nullop; 865 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
633 867
634 PUSHMARK (SP); 868 PUSHMARK (SP);
635 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
636 PUTBACK; 870 PUTBACK;
637 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
638 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
639 SPAGAIN; 873 SPAGAIN;
640 } 874 }
641}
642 875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882
643static void 883static void
644coro_destroy (pTHX_ struct coro *coro) 884coro_destruct (pTHX_ struct coro *coro)
645{ 885{
646 if (!IN_DESTRUCT) 886 if (!IN_DESTRUCT)
647 { 887 {
648 /* restore all saved variables and stuff */ 888 /* restore all saved variables and stuff */
649 LEAVE_SCOPE (0); 889 LEAVE_SCOPE (0);
… …
665 SvREFCNT_dec (GvSV (PL_errgv)); 905 SvREFCNT_dec (GvSV (PL_errgv));
666 SvREFCNT_dec (PL_defoutgv); 906 SvREFCNT_dec (PL_defoutgv);
667 SvREFCNT_dec (PL_rs); 907 SvREFCNT_dec (PL_rs);
668 SvREFCNT_dec (GvSV (irsgv)); 908 SvREFCNT_dec (GvSV (irsgv));
669 909
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
670 SvREFCNT_dec (coro->saved_deffh); 913 SvREFCNT_dec (coro->saved_deffh);
671 //SvREFCNT_dec (coro->throw); 914 SvREFCNT_dec (coro->throw);
672 915
673 coro_destroy_stacks (aTHX); 916 coro_destruct_stacks (aTHX);
674} 917}
675 918
676static void 919INLINE void
677free_coro_mortal (pTHX) 920free_coro_mortal (pTHX)
678{ 921{
679 if (expect_true (coro_mortal)) 922 if (expect_true (coro_mortal))
680 { 923 {
681 SvREFCNT_dec (coro_mortal); 924 SvREFCNT_dec (coro_mortal);
… …
715 : cx->blk_gimme == G_SCALAR ? bot + 1 958 : cx->blk_gimme == G_SCALAR ? bot + 1
716 : bot; 959 : bot;
717 960
718 av_extend (av, top - bot); 961 av_extend (av, top - bot);
719 while (bot < top) 962 while (bot < top)
720 av_push (av, SvREFCNT_inc (*bot++)); 963 av_push (av, SvREFCNT_inc_NN (*bot++));
721 964
722 PL_runops = RUNOPS_DEFAULT; 965 PL_runops = RUNOPS_DEFAULT;
723 ENTER; 966 ENTER;
724 SAVETMPS; 967 SAVETMPS;
725 EXTEND (SP, 3); 968 EXTEND (SP, 3);
… …
763 SAVETMPS; 1006 SAVETMPS;
764 EXTEND (SP, 3); 1007 EXTEND (SP, 3);
765 PUSHMARK (SP); 1008 PUSHMARK (SP);
766 PUSHs (&PL_sv_yes); 1009 PUSHs (&PL_sv_yes);
767 PUSHs (fullname); 1010 PUSHs (fullname);
768 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
769 PUTBACK; 1012 PUTBACK;
770 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
771 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
772 SPAGAIN; 1015 SPAGAIN;
773 FREETMPS; 1016 FREETMPS;
… …
805 1048
806 TAINT_NOT; 1049 TAINT_NOT;
807 return 0; 1050 return 0;
808} 1051}
809 1052
1053static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
810/* inject a fake call to Coro::State::_cctx_init into the execution */ 1060/* inject a fake call to Coro::State::_cctx_init into the execution */
811/* _cctx_init should be careful, as it could be called at almost any time */ 1061/* _cctx_init should be careful, as it could be called at almost any time */
812/* during execution of a perl program */ 1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
813static void NOINLINE 1064static void NOINLINE
814prepare_cctx (pTHX_ coro_cctx *cctx) 1065cctx_prepare (pTHX_ coro_cctx *cctx)
815{ 1066{
816 dSP; 1067 dSP;
817 LOGOP myop; 1068 UNOP myop;
818 1069
819 PL_top_env = &PL_start_env; 1070 PL_top_env = &PL_start_env;
820 1071
821 if (cctx->flags & CC_TRACE) 1072 if (cctx->flags & CC_TRACE)
822 PL_runops = runops_trace; 1073 PL_runops = runops_trace;
823 1074
824 Zero (&myop, 1, LOGOP); 1075 Zero (&myop, 1, UNOP);
825 myop.op_next = PL_op; 1076 myop.op_next = PL_op;
826 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
827 1078
828 PUSHMARK (SP); 1079 PUSHMARK (SP);
829 EXTEND (SP, 2); 1080 EXTEND (SP, 2);
830 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
831 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
832 PUTBACK; 1083 PUTBACK;
833 PL_op = (OP *)&myop; 1084 PL_op = (OP *)&myop;
834 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
835 SPAGAIN; 1086 SPAGAIN;
836} 1087}
837 1088
1089/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void
1091transfer_tail (pTHX)
1092{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097 free_coro_mortal (aTHX);
1098 UNLOCK;
1099
1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
1109
838/* 1110/*
839 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
840 */ 1112 */
841static void 1113static void
842coro_run (void *arg) 1114cctx_run (void *arg)
843{ 1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
844 dTHX; 1122 dTHX;
845 1123
846 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1124 /* normally we would need to skip the entersub here */
847 UNLOCK; 1125 /* not doing so will re-execute it, which is exactly what we want */
848
849 /* we now skip the entersub that lead to transfer() */
850 PL_op = PL_op->op_next; 1126 /* PL_nop = PL_nop->op_next */
851 1127
852 /* inject a fake subroutine call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
853 prepare_cctx (aTHX_ (coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
854 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX);
1134
855 /* somebody or something will hit me for both perl_run and PL_restartop */ 1135 /* somebody or something will hit me for both perl_run and PL_restartop */
856 PL_restartop = PL_op; 1136 PL_restartop = PL_op;
857 perl_run (PL_curinterp); 1137 perl_run (PL_curinterp);
858 1138
859 /* 1139 /*
860 * If perl-run returns we assume exit() was being called or the coro 1140 * If perl-run returns we assume exit() was being called or the coro
861 * fell off the end, which seems to be the only valid (non-bug) 1141 * fell off the end, which seems to be the only valid (non-bug)
862 * reason for perl_run to return. We try to exit by jumping to the 1142 * reason for perl_run to return. We try to exit by jumping to the
863 * bootstrap-time "top" top_env, as we cannot restore the "main" 1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
864 * coroutine as Coro has no such concept 1144 * coroutine as Coro has no such concept
865 */ 1145 */
866 PL_top_env = main_top_env; 1146 PL_top_env = main_top_env;
867 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
868} 1149}
869 1150
870static coro_cctx * 1151static coro_cctx *
871cctx_new () 1152cctx_new ()
872{ 1153{
873 coro_cctx *cctx; 1154 coro_cctx *cctx;
1155
1156 ++cctx_count;
1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
874 void *stack_start; 1183 void *stack_start;
875 size_t stack_size; 1184 size_t stack_size;
876 1185
877 ++cctx_count;
878
879 Newz (0, cctx, 1, coro_cctx);
880
881#if HAVE_MMAP 1186#if HAVE_MMAP
882
883 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
884 /* mmap supposedly does allocate-on-write for us */ 1188 /* mmap supposedly does allocate-on-write for us */
885 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
886 1190
887 if (cctx->sptr != (void *)-1) 1191 if (cctx->sptr != (void *)-1)
888 { 1192 {
889# if CORO_STACKGUARD 1193 #if CORO_STACKGUARD
890 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
891# endif 1195 #endif
892 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
893 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
894 cctx->flags |= CC_MAPPED; 1198 cctx->flags |= CC_MAPPED;
895 } 1199 }
896 else 1200 else
897#endif 1201#endif
898 { 1202 {
899 cctx->ssize = coro_stacksize * (long)sizeof (long); 1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
900 New (0, cctx->sptr, coro_stacksize, long); 1204 New (0, cctx->sptr, cctx_stacksize, long);
901 1205
902 if (!cctx->sptr) 1206 if (!cctx->sptr)
903 { 1207 {
904 perror ("FATAL: unable to allocate stack for coroutine"); 1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
905 _exit (EXIT_FAILURE); 1209 _exit (EXIT_FAILURE);
906 } 1210 }
907 1211
908 stack_start = cctx->sptr; 1212 stack_start = cctx->sptr;
909 stack_size = cctx->ssize; 1213 stack_size = cctx->ssize;
910 } 1214 }
911 1215
912 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1218 #endif
1219
913 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
914 1221
915 return cctx; 1222 return cctx;
916} 1223}
917 1224
918static void 1225static void
… …
920{ 1227{
921 if (!cctx) 1228 if (!cctx)
922 return; 1229 return;
923 1230
924 --cctx_count; 1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
925 1233
1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
926#if CORO_USE_VALGRIND 1237 #if CORO_USE_VALGRIND
927 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
928#endif 1239 #endif
929 1240
930#if HAVE_MMAP 1241#if HAVE_MMAP
931 if (cctx->flags & CC_MAPPED) 1242 if (cctx->flags & CC_MAPPED)
932 munmap (cctx->sptr, cctx->ssize); 1243 munmap (cctx->sptr, cctx->ssize);
933 else 1244 else
934#endif 1245#endif
935 Safefree (cctx->sptr); 1246 Safefree (cctx->sptr);
1247 }
936 1248
937 Safefree (cctx); 1249 Safefree (cctx);
938} 1250}
939 1251
940/* wether this cctx should be destructed */ 1252/* wether this cctx should be destructed */
941#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
942 1254
943static coro_cctx * 1255static coro_cctx *
944cctx_get (pTHX) 1256cctx_get (pTHX)
945{ 1257{
946 while (expect_true (cctx_first)) 1258 while (expect_true (cctx_first))
… …
953 return cctx; 1265 return cctx;
954 1266
955 cctx_destroy (cctx); 1267 cctx_destroy (cctx);
956 } 1268 }
957 1269
958 return cctx_new (); 1270 return cctx_new_run ();
959} 1271}
960 1272
961static void 1273static void
962cctx_put (coro_cctx *cctx) 1274cctx_put (coro_cctx *cctx)
963{ 1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
964 /* free another cctx if overlimit */ 1278 /* free another cctx if overlimit */
965 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1279 if (expect_false (cctx_idle >= cctx_max_idle))
966 { 1280 {
967 coro_cctx *first = cctx_first; 1281 coro_cctx *first = cctx_first;
968 cctx_first = first->next; 1282 cctx_first = first->next;
969 --cctx_idle; 1283 --cctx_idle;
970 1284
… …
982transfer_check (pTHX_ struct coro *prev, struct coro *next) 1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
983{ 1297{
984 if (expect_true (prev != next)) 1298 if (expect_true (prev != next))
985 { 1299 {
986 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
987 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
988 1302
989 if (expect_false (next->flags & CF_RUNNING)) 1303 if (expect_false (next->flags & CF_RUNNING))
990 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
991 1305
992 if (expect_false (next->flags & CF_DESTROYED)) 1306 if (expect_false (next->flags & CF_DESTROYED))
993 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
994 1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
995 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
996 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
997 } 1313 }
998} 1314}
999 1315
1000/* always use the TRANSFER macro */ 1316/* always use the TRANSFER macro */
1001static void NOINLINE 1317static void NOINLINE
1002transfer (pTHX_ struct coro *prev, struct coro *next) 1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1003{ 1319{
1004 dSTACKLEVEL; 1320 dSTACKLEVEL;
1005 1321
1006 /* sometimes transfer is only called to set idle_sp */ 1322 /* sometimes transfer is only called to set idle_sp */
1007 if (expect_false (!next)) 1323 if (expect_false (!next))
1008 { 1324 {
1009 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1010 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1011 } 1327 }
1012 else if (expect_true (prev != next)) 1328 else if (expect_true (prev != next))
1013 { 1329 {
1014 coro_cctx *prev__cctx; 1330 coro_cctx *prev__cctx;
1015 1331
1016 if (expect_false (prev->flags & CF_NEW)) 1332 if (expect_false (prev->flags & CF_NEW))
1017 { 1333 {
1018 /* create a new empty context */ 1334 /* create a new empty/source context */
1019 Newz (0, prev->cctx, 1, coro_cctx); 1335 prev->cctx = cctx_new_empty ();
1020 prev->flags &= ~CF_NEW; 1336 prev->flags &= ~CF_NEW;
1021 prev->flags |= CF_RUNNING; 1337 prev->flags |= CF_RUNNING;
1022 } 1338 }
1023 1339
1024 prev->flags &= ~CF_RUNNING; 1340 prev->flags &= ~CF_RUNNING;
1025 next->flags |= CF_RUNNING; 1341 next->flags |= CF_RUNNING;
1026 1342
1027 LOCK; 1343 LOCK;
1344
1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1028 1347
1029 if (expect_false (next->flags & CF_NEW)) 1348 if (expect_false (next->flags & CF_NEW))
1030 { 1349 {
1031 /* need to start coroutine */ 1350 /* need to start coroutine */
1032 next->flags &= ~CF_NEW; 1351 next->flags &= ~CF_NEW;
1033 /* first get rid of the old state */
1034 save_perl (aTHX_ prev);
1035 /* setup coroutine call */ 1352 /* setup coroutine call */
1036 coro_setup (aTHX_ next); 1353 coro_setup (aTHX_ next);
1037 } 1354 }
1038 else 1355 else
1356 load_perl (aTHX_ next);
1357
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */
1361 if (expect_true (
1362 prev__cctx->idle_sp == (void *)stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
1039 { 1366 {
1040 /* coroutine already started */
1041 save_perl (aTHX_ prev);
1042 load_perl (aTHX_ next);
1043 }
1044
1045 prev__cctx = prev->cctx;
1046
1047 /* possibly "free" the cctx */
1048 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1049 {
1050 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1051 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1052 1369
1053 prev->cctx = 0; 1370 prev->cctx = 0;
1054 1371
1055 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1056 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1057 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1058 next->cctx = cctx_get (aTHX); 1376 next->cctx = cctx_get (aTHX);
1059 1377
1060 cctx_put (prev__cctx); 1378 cctx_put (prev__cctx);
1061 } 1379 }
1062 1380
1063 ++next->usecount; 1381 ++next->usecount;
1064 1382
1065 if (expect_true (!next->cctx)) 1383 if (expect_true (!next->cctx))
1066 next->cctx = cctx_get (aTHX); 1384 next->cctx = cctx_get (aTHX);
1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1067 1388
1068 if (expect_false (prev__cctx != next->cctx)) 1389 if (expect_false (prev__cctx != next->cctx))
1069 { 1390 {
1070 prev__cctx->top_env = PL_top_env; 1391 prev__cctx->top_env = PL_top_env;
1071 PL_top_env = next->cctx->top_env; 1392 PL_top_env = next->cctx->top_env;
1072 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1073 } 1394 }
1074 1395
1075 free_coro_mortal (aTHX); 1396 transfer_tail (aTHX);
1076 UNLOCK;
1077 } 1397 }
1078} 1398}
1079 1399
1080struct transfer_args
1081{
1082 struct coro *prev, *next;
1083};
1084
1085#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1086#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1087 1402
1088/** high level stuff ********************************************************/ 1403/** high level stuff ********************************************************/
1089 1404
1090static int 1405static int
… …
1108 1423
1109 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
1110 { 1425 {
1111 struct coro temp; 1426 struct coro temp;
1112 1427
1113 if (coro->flags & CF_RUNNING) 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1114 croak ("FATAL: tried to destroy currently running coroutine");
1115 1429
1116 save_perl (aTHX_ &temp); 1430 save_perl (aTHX_ &temp);
1117 load_perl (aTHX_ coro); 1431 load_perl (aTHX_ coro);
1118 1432
1119 coro_destroy (aTHX_ coro); 1433 coro_destruct (aTHX_ coro);
1120 1434
1121 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1435 load_perl (aTHX_ &temp);
1122 1436
1123 coro->mainstack = 0; 1437 coro->slot = 0;
1124 } 1438 }
1125 1439
1126 cctx_destroy (coro->cctx); 1440 cctx_destroy (coro->cctx);
1127 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
1128 1442
… …
1170# define MGf_DUP 0 1484# define MGf_DUP 0
1171#endif 1485#endif
1172}; 1486};
1173 1487
1174static void 1488static void
1175prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1176{ 1490{
1177 ta->prev = SvSTATE (prev_sv); 1491 ta->prev = SvSTATE (prev_sv);
1178 ta->next = SvSTATE (next_sv); 1492 ta->next = SvSTATE (next_sv);
1179 TRANSFER_CHECK (*ta); 1493 TRANSFER_CHECK (*ta);
1180} 1494}
1181 1495
1182static void 1496static void
1183api_transfer (SV *prev_sv, SV *next_sv) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1184{ 1498{
1185 dTHX;
1186 struct transfer_args ta; 1499 struct coro_transfer_args ta;
1187 1500
1188 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1189 TRANSFER (ta); 1502 TRANSFER (ta, 1);
1190} 1503}
1191 1504
1192/** Coro ********************************************************************/ 1505/** Coro ********************************************************************/
1193 1506
1194static void 1507static void
… …
1196{ 1509{
1197 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1198} 1511}
1199 1512
1200static SV * 1513static SV *
1201coro_deq (pTHX_ int min_prio) 1514coro_deq (pTHX)
1202{ 1515{
1203 int prio = PRIO_MAX - PRIO_MIN; 1516 int prio;
1204 1517
1205 min_prio -= PRIO_MIN;
1206 if (min_prio < 0)
1207 min_prio = 0;
1208
1209 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1210 if (AvFILLp (coro_ready [prio]) >= 0) 1519 if (AvFILLp (coro_ready [prio]) >= 0)
1211 return av_shift (coro_ready [prio]); 1520 return av_shift (coro_ready [prio]);
1212 1521
1213 return 0; 1522 return 0;
1214} 1523}
1215 1524
1216static int 1525static int
1217api_ready (SV *coro_sv) 1526api_ready (pTHX_ SV *coro_sv)
1218{ 1527{
1219 dTHX;
1220 struct coro *coro; 1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1221 1531
1222 if (SvROK (coro_sv)) 1532 if (SvROK (coro_sv))
1223 coro_sv = SvRV (coro_sv); 1533 coro_sv = SvRV (coro_sv);
1224 1534
1225 coro = SvSTATE (coro_sv); 1535 coro = SvSTATE (coro_sv);
… …
1228 return 0; 1538 return 0;
1229 1539
1230 coro->flags |= CF_READY; 1540 coro->flags |= CF_READY;
1231 1541
1232 LOCK; 1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
1233 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1234 ++coro_nready; 1548 ++coro_nready;
1549
1235 UNLOCK; 1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1236 1570
1237 return 1; 1571 return 1;
1238} 1572}
1239 1573
1240static int 1574static int
1241api_is_ready (SV *coro_sv) 1575api_is_ready (pTHX_ SV *coro_sv)
1242{ 1576{
1243 dTHX;
1244 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1245} 1578}
1246 1579
1247static void 1580INLINE void
1248prepare_schedule (pTHX_ struct transfer_args *ta) 1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1249{ 1582{
1250 SV *prev_sv, *next_sv; 1583 SV *prev_sv, *next_sv;
1251 1584
1252 for (;;) 1585 for (;;)
1253 { 1586 {
1254 LOCK; 1587 LOCK;
1255 next_sv = coro_deq (aTHX_ PRIO_MIN); 1588 next_sv = coro_deq (aTHX);
1256 1589
1257 /* nothing to schedule: call the idle handler */ 1590 /* nothing to schedule: call the idle handler */
1258 if (expect_false (!next_sv)) 1591 if (expect_false (!next_sv))
1259 { 1592 {
1260 dSP; 1593 dSP;
… …
1264 SAVETMPS; 1597 SAVETMPS;
1265 1598
1266 PUSHMARK (SP); 1599 PUSHMARK (SP);
1267 PUTBACK; 1600 PUTBACK;
1268 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1269 1603
1270 FREETMPS; 1604 FREETMPS;
1271 LEAVE; 1605 LEAVE;
1272 continue; 1606 continue;
1273 } 1607 }
… …
1277 /* cannot transfer to destroyed coros, skip and look for next */ 1611 /* cannot transfer to destroyed coros, skip and look for next */
1278 if (expect_false (ta->next->flags & CF_DESTROYED)) 1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1279 { 1613 {
1280 UNLOCK; 1614 UNLOCK;
1281 SvREFCNT_dec (next_sv); 1615 SvREFCNT_dec (next_sv);
1282 /* coro_nready is already taken care of by destroy */ 1616 /* coro_nready has already been taken care of by destroy */
1283 continue; 1617 continue;
1284 } 1618 }
1285 1619
1286 --coro_nready; 1620 --coro_nready;
1287 UNLOCK; 1621 UNLOCK;
… …
1290 1624
1291 /* free this only after the transfer */ 1625 /* free this only after the transfer */
1292 prev_sv = SvRV (coro_current); 1626 prev_sv = SvRV (coro_current);
1293 ta->prev = SvSTATE (prev_sv); 1627 ta->prev = SvSTATE (prev_sv);
1294 TRANSFER_CHECK (*ta); 1628 TRANSFER_CHECK (*ta);
1295 assert (ta->next->flags & CF_READY); 1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1296 ta->next->flags &= ~CF_READY; 1630 ta->next->flags &= ~CF_READY;
1297 SvRV_set (coro_current, next_sv); 1631 SvRV_set (coro_current, next_sv);
1298 1632
1299 LOCK; 1633 LOCK;
1300 free_coro_mortal (aTHX); 1634 free_coro_mortal (aTHX);
1301 coro_mortal = prev_sv; 1635 coro_mortal = prev_sv;
1302 UNLOCK; 1636 UNLOCK;
1303} 1637}
1304 1638
1305static void 1639INLINE void
1306prepare_cede (pTHX_ struct transfer_args *ta) 1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1307{ 1641{
1308 api_ready (coro_current); 1642 api_ready (aTHX_ coro_current);
1309 prepare_schedule (aTHX_ ta); 1643 prepare_schedule (aTHX_ ta);
1310} 1644}
1311 1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
1655 }
1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1667}
1668
1312static int 1669static int
1313prepare_cede_notself (pTHX_ struct transfer_args *ta) 1670api_cede (pTHX)
1314{ 1671{
1315 if (coro_nready) 1672 struct coro_transfer_args ta;
1316 { 1673
1317 SV *prev = SvRV (coro_current);
1318 prepare_schedule (aTHX_ ta); 1674 prepare_cede (aTHX_ &ta);
1319 api_ready (prev); 1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1320 return 1; 1679 return 1;
1321 } 1680 }
1322 else 1681 else
1323 return 0; 1682 return 0;
1324} 1683}
1325 1684
1326static void
1327api_schedule (void)
1328{
1329 dTHX;
1330 struct transfer_args ta;
1331
1332 prepare_schedule (aTHX_ &ta);
1333 TRANSFER (ta);
1334}
1335
1336static int 1685static int
1337api_cede (void) 1686api_cede_notself (pTHX)
1338{ 1687{
1339 dTHX; 1688 if (coro_nready)
1689 {
1340 struct transfer_args ta; 1690 struct coro_transfer_args ta;
1341 1691
1342 prepare_cede (aTHX_ &ta); 1692 prepare_cede_notself (aTHX_ &ta);
1343
1344 if (expect_true (ta.prev != ta.next))
1345 {
1346 TRANSFER (ta); 1693 TRANSFER (ta, 1);
1347 return 1; 1694 return 1;
1348 } 1695 }
1349 else 1696 else
1350 return 0; 1697 return 0;
1351} 1698}
1352 1699
1353static int 1700static void
1354api_cede_notself (void)
1355{
1356 dTHX;
1357 struct transfer_args ta;
1358
1359 if (prepare_cede_notself (aTHX_ &ta))
1360 {
1361 TRANSFER (ta);
1362 return 1;
1363 }
1364 else
1365 return 0;
1366}
1367
1368static void
1369api_trace (SV *coro_sv, int flags) 1701api_trace (pTHX_ SV *coro_sv, int flags)
1370{ 1702{
1371 dTHX;
1372 struct coro *coro = SvSTATE (coro_sv); 1703 struct coro *coro = SvSTATE (coro_sv);
1373 1704
1374 if (flags & CC_TRACE) 1705 if (flags & CC_TRACE)
1375 { 1706 {
1376 if (!coro->cctx) 1707 if (!coro->cctx)
1377 coro->cctx = cctx_new (); 1708 coro->cctx = cctx_new_run ();
1378 else if (!(coro->cctx->flags & CC_TRACE)) 1709 else if (!(coro->cctx->flags & CC_TRACE))
1379 croak ("cannot enable tracing on coroutine with custom stack"); 1710 croak ("cannot enable tracing on coroutine with custom stack,");
1380 1711
1381 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1382 } 1713 }
1383 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1384 { 1715 {
1385 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1386 1717
1387 if (coro->flags & CF_RUNNING) 1718 if (coro->flags & CF_RUNNING)
1388 PL_runops = RUNOPS_DEFAULT; 1719 PL_runops = RUNOPS_DEFAULT;
1389 else 1720 else
1390 coro->runops = RUNOPS_DEFAULT; 1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
1725#if 0
1726static int
1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1728{
1729 AV *padlist;
1730 AV *av = (AV *)mg->mg_obj;
1731
1732 abort ();
1733
1734 return 0;
1735}
1736
1737static MGVTBL coro_gensub_vtbl = {
1738 0, 0, 0, 0,
1739 coro_gensub_free
1740};
1741#endif
1742
1743/*****************************************************************************/
1744/* PerlIO::cede */
1745
1746typedef struct
1747{
1748 PerlIOBuf base;
1749 NV next, every;
1750} PerlIOCede;
1751
1752static IV
1753PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1758 self->next = nvtime () + self->every;
1759
1760 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1761}
1762
1763static SV *
1764PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1765{
1766 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1767
1768 return newSVnv (self->every);
1769}
1770
1771static IV
1772PerlIOCede_flush (pTHX_ PerlIO *f)
1773{
1774 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1775 double now = nvtime ();
1776
1777 if (now >= self->next)
1778 {
1779 api_cede (aTHX);
1780 self->next = now + self->every;
1781 }
1782
1783 return PerlIOBuf_flush (aTHX_ f);
1784}
1785
1786static PerlIO_funcs PerlIO_cede =
1787{
1788 sizeof(PerlIO_funcs),
1789 "cede",
1790 sizeof(PerlIOCede),
1791 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1792 PerlIOCede_pushed,
1793 PerlIOBuf_popped,
1794 PerlIOBuf_open,
1795 PerlIOBase_binmode,
1796 PerlIOCede_getarg,
1797 PerlIOBase_fileno,
1798 PerlIOBuf_dup,
1799 PerlIOBuf_read,
1800 PerlIOBuf_unread,
1801 PerlIOBuf_write,
1802 PerlIOBuf_seek,
1803 PerlIOBuf_tell,
1804 PerlIOBuf_close,
1805 PerlIOCede_flush,
1806 PerlIOBuf_fill,
1807 PerlIOBase_eof,
1808 PerlIOBase_error,
1809 PerlIOBase_clearerr,
1810 PerlIOBase_setlinebuf,
1811 PerlIOBuf_get_base,
1812 PerlIOBuf_bufsiz,
1813 PerlIOBuf_get_ptr,
1814 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt,
1816};
1817
1818/*****************************************************************************/
1819
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP *
1831pp_restore (pTHX)
1832{
1833 dSP;
1834
1835 PUSHMARK (SP);
1836
1837 EXTEND (SP, 3);
1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841 PUSHs ((SV *)CvGV (slf_cv));
1842
1843 RETURNOP (slf_restore.op_first);
1844}
1845
1846static void
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851
1852static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1856
1857 frame->prepare = slf_prepare_set_stacklevel;
1858 frame->check = slf_check_nop;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861
1862static void
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 {
1921 /* first iteration */
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926
1927 /* do a quick consistency check on the "function" object, and if it isn't */
1928 /* for us, divert to the real entersub */
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1930 return PL_ppaddr[OP_ENTERSUB](aTHX);
1931
1932 /* pop args */
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
1936 {
1937 /* ampersand-form of call, use @_ instead of stack */
1938 AV *av = GvAV (PL_defgv);
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 }
1942
1943 PUTBACK;
1944
1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
1953 {
1954 struct coro_transfer_args ta;
1955
1956 slf_frame.prepare (aTHX_ &ta);
1957 TRANSFER (ta, 0);
1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
1967
1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
1972 {
1973 if (sp == bot)
1974 XPUSHs (&PL_sv_undef);
1975
1976 SP = bot + 1;
1391 } 1977 }
1978
1979 PUTBACK;
1980 }
1981
1982 return NORMAL;
1983}
1984
1985static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1987{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1989
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016}
2017
2018/*****************************************************************************/
2019
2020static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2022{
2023 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0];
2025
2026 if (SvIVX (count_sv) > 0)
2027 {
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2029 return 0;
2030 }
2031 else
2032 {
2033 int i;
2034 /* if we were woken up but can't down, we look through the whole */
2035 /* waiters list and only add us if we aren't in there already */
2036 /* this avoids some degenerate memory usage cases */
2037
2038 for (i = 1; i <= AvFILLp (av); ++i)
2039 if (AvARRAY (av)[i] == SvRV (coro_current))
2040 return 1;
2041
2042 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2043 return 1;
2044 }
2045}
2046
2047static void
2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
2049{
2050 AV *av = (AV *)SvRV (arg [0]);
2051
2052 if (SvIVX (AvARRAY (av)[0]) > 0)
2053 {
2054 frame->data = (void *)av;
2055 frame->prepare = prepare_nop;
2056 }
2057 else
2058 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060
2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2062 frame->prepare = prepare_schedule;
2063 }
2064
2065 frame->check = slf_check_semaphore_down;
2066
1392} 2067}
1393 2068
1394MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1395 2070
1396PROTOTYPES: DISABLE 2071PROTOTYPES: DISABLE
1397 2072
1398BOOT: 2073BOOT:
1399{ 2074{
1400#ifdef USE_ITHREADS 2075#ifdef USE_ITHREADS
1401 MUTEX_INIT (&coro_mutex); 2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT;
2079# endif
1402#endif 2080#endif
1403 BOOT_PAGESIZE; 2081 BOOT_PAGESIZE;
1404 2082
1405 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1406 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2088 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2089
2090 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2091 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2092 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1407 2093
1408 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2094 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1409 2095
1410 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2096 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1411 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2097 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1416 main_top_env = PL_top_env; 2102 main_top_env = PL_top_env;
1417 2103
1418 while (main_top_env->je_prev) 2104 while (main_top_env->je_prev)
1419 main_top_env = main_top_env->je_prev; 2105 main_top_env = main_top_env->je_prev;
1420 2106
1421 coroapi.ver = CORO_API_VERSION; 2107 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION;
2109
1422 coroapi.transfer = api_transfer; 2110 coroapi.transfer = api_transfer;
2111
2112 coroapi.sv_state = SvSTATE_;
2113 coroapi.execute_slf = api_execute_slf;
2114 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself;
2118
2119 {
2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2121
2122 if (!svp) croak ("Time::HiRes is required");
2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2124
2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2126 }
1423 2127
1424 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1425} 2129}
1426 2130
1427SV * 2131SV *
1428new (char *klass, ...) 2132new (char *klass, ...)
1429 CODE: 2133 CODE:
1430{ 2134{
1431 struct coro *coro; 2135 struct coro *coro;
2136 MAGIC *mg;
1432 HV *hv; 2137 HV *hv;
1433 int i; 2138 int i;
1434 2139
1435 Newz (0, coro, 1, struct coro); 2140 Newz (0, coro, 1, struct coro);
1436 coro->args = newAV (); 2141 coro->args = newAV ();
… …
1439 if (coro_first) coro_first->prev = coro; 2144 if (coro_first) coro_first->prev = coro;
1440 coro->next = coro_first; 2145 coro->next = coro_first;
1441 coro_first = coro; 2146 coro_first = coro;
1442 2147
1443 coro->hv = hv = newHV (); 2148 coro->hv = hv = newHV ();
1444 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
1445 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1446 2152
1447 av_extend (coro->args, items - 1); 2153 av_extend (coro->args, items - 1);
1448 for (i = 1; i < items; i++) 2154 for (i = 1; i < items; i++)
1449 av_push (coro->args, newSVsv (ST (i))); 2155 av_push (coro->args, newSVsv (ST (i)));
1450} 2156}
1451 OUTPUT: 2157 OUTPUT:
1452 RETVAL 2158 RETVAL
1453 2159
1454# these not obviously related functions are all rolled into the same xs
1455# function to increase chances that they all will call transfer with the same
1456# stack offset
1457void 2160void
1458_set_stacklevel (...) 2161_set_stacklevel (...)
1459 ALIAS: 2162 CODE:
1460 Coro::State::transfer = 1 2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1461 Coro::schedule = 2
1462 Coro::cede = 3
1463 Coro::cede_notself = 4
1464 CODE:
1465{
1466 struct transfer_args ta;
1467 2164
1468 switch (ix) 2165void
1469 { 2166transfer (...)
1470 case 0: 2167 PROTOTYPE: $$
1471 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2168 CODE:
1472 ta.next = 0; 2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1473 break;
1474
1475 case 1:
1476 if (items != 2)
1477 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1478
1479 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1480 break;
1481
1482 case 2:
1483 prepare_schedule (aTHX_ &ta);
1484 break;
1485
1486 case 3:
1487 prepare_cede (aTHX_ &ta);
1488 break;
1489
1490 case 4:
1491 if (!prepare_cede_notself (aTHX_ &ta))
1492 XSRETURN_EMPTY;
1493
1494 break;
1495 }
1496
1497 BARRIER;
1498 TRANSFER (ta);
1499
1500 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1501 XSRETURN_YES;
1502}
1503 2170
1504bool 2171bool
1505_destroy (SV *coro_sv) 2172_destroy (SV *coro_sv)
1506 CODE: 2173 CODE:
1507 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1508 OUTPUT: 2175 OUTPUT:
1509 RETVAL 2176 RETVAL
1510 2177
1511void 2178void
1512_exit (code) 2179_exit (int code)
1513 int code
1514 PROTOTYPE: $ 2180 PROTOTYPE: $
1515 CODE: 2181 CODE:
1516 _exit (code); 2182 _exit (code);
1517 2183
1518int 2184int
1519cctx_stacksize (int new_stacksize = 0) 2185cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$
1520 CODE: 2187 CODE:
1521 RETVAL = coro_stacksize; 2188 RETVAL = cctx_stacksize;
1522 if (new_stacksize) 2189 if (new_stacksize)
2190 {
1523 coro_stacksize = new_stacksize; 2191 cctx_stacksize = new_stacksize;
2192 ++cctx_gen;
2193 }
1524 OUTPUT: 2194 OUTPUT:
1525 RETVAL 2195 RETVAL
1526 2196
1527int 2197int
2198cctx_max_idle (int max_idle = 0)
2199 PROTOTYPE: ;$
2200 CODE:
2201 RETVAL = cctx_max_idle;
2202 if (max_idle > 1)
2203 cctx_max_idle = max_idle;
2204 OUTPUT:
2205 RETVAL
2206
2207int
1528cctx_count () 2208cctx_count ()
2209 PROTOTYPE:
1529 CODE: 2210 CODE:
1530 RETVAL = cctx_count; 2211 RETVAL = cctx_count;
1531 OUTPUT: 2212 OUTPUT:
1532 RETVAL 2213 RETVAL
1533 2214
1534int 2215int
1535cctx_idle () 2216cctx_idle ()
2217 PROTOTYPE:
1536 CODE: 2218 CODE:
1537 RETVAL = cctx_idle; 2219 RETVAL = cctx_idle;
1538 OUTPUT: 2220 OUTPUT:
1539 RETVAL 2221 RETVAL
1540 2222
1541void 2223void
1542list () 2224list ()
2225 PROTOTYPE:
1543 PPCODE: 2226 PPCODE:
1544{ 2227{
1545 struct coro *coro; 2228 struct coro *coro;
1546 for (coro = coro_first; coro; coro = coro->next) 2229 for (coro = coro_first; coro; coro = coro->next)
1547 if (coro->hv) 2230 if (coro->hv)
… …
1552call (Coro::State coro, SV *coderef) 2235call (Coro::State coro, SV *coderef)
1553 ALIAS: 2236 ALIAS:
1554 eval = 1 2237 eval = 1
1555 CODE: 2238 CODE:
1556{ 2239{
1557 if (coro->mainstack) 2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1558 { 2241 {
1559 struct coro temp; 2242 struct coro temp;
1560 Zero (&temp, 1, struct coro);
1561 2243
1562 if (!(coro->flags & CF_RUNNING)) 2244 if (!(coro->flags & CF_RUNNING))
1563 { 2245 {
2246 PUTBACK;
1564 save_perl (aTHX_ &temp); 2247 save_perl (aTHX_ &temp);
1565 load_perl (aTHX_ coro); 2248 load_perl (aTHX_ coro);
1566 } 2249 }
1567 2250
1568 { 2251 {
1569 dSP; 2252 dSP;
1570 ENTER; 2253 ENTER;
1571 SAVETMPS; 2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK;
1572 PUSHMARK (SP); 2257 PUSHMARK (SP);
1573 PUTBACK; 2258
1574 if (ix) 2259 if (ix)
1575 eval_sv (coderef, 0); 2260 eval_sv (coderef, 0);
1576 else 2261 else
1577 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2263
2264 POPSTACK;
1578 SPAGAIN; 2265 SPAGAIN;
1579 FREETMPS; 2266 FREETMPS;
1580 LEAVE; 2267 LEAVE;
1581 PUTBACK; 2268 PUTBACK;
1582 } 2269 }
1583 2270
1584 if (!(coro->flags & CF_RUNNING)) 2271 if (!(coro->flags & CF_RUNNING))
1585 { 2272 {
1586 save_perl (aTHX_ coro); 2273 save_perl (aTHX_ coro);
1587 load_perl (aTHX_ &temp); 2274 load_perl (aTHX_ &temp);
2275 SPAGAIN;
1588 } 2276 }
1589 } 2277 }
1590} 2278}
1591 2279
1592SV * 2280SV *
… …
1601 RETVAL = boolSV (coro->flags & ix); 2289 RETVAL = boolSV (coro->flags & ix);
1602 OUTPUT: 2290 OUTPUT:
1603 RETVAL 2291 RETVAL
1604 2292
1605void 2293void
2294throw (Coro::State self, SV *throw = &PL_sv_undef)
2295 PROTOTYPE: $;$
2296 CODE:
2297 SvREFCNT_dec (self->throw);
2298 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2299
2300void
1606api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags
1607 2304
1608SV * 2305SV *
1609has_stack (Coro::State coro) 2306has_cctx (Coro::State coro)
1610 PROTOTYPE: $ 2307 PROTOTYPE: $
1611 CODE: 2308 CODE:
1612 RETVAL = boolSV (!!coro->cctx); 2309 RETVAL = boolSV (!!coro->cctx);
1613 OUTPUT: 2310 OUTPUT:
1614 RETVAL 2311 RETVAL
… …
1619 CODE: 2316 CODE:
1620 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2317 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1621 OUTPUT: 2318 OUTPUT:
1622 RETVAL 2319 RETVAL
1623 2320
1624IV 2321UV
1625rss (Coro::State coro) 2322rss (Coro::State coro)
1626 PROTOTYPE: $ 2323 PROTOTYPE: $
1627 ALIAS: 2324 ALIAS:
1628 usecount = 1 2325 usecount = 1
1629 CODE: 2326 CODE:
… …
1633 case 1: RETVAL = coro->usecount; break; 2330 case 1: RETVAL = coro->usecount; break;
1634 } 2331 }
1635 OUTPUT: 2332 OUTPUT:
1636 RETVAL 2333 RETVAL
1637 2334
2335void
2336force_cctx ()
2337 PROTOTYPE:
2338 CODE:
2339 struct coro *coro = SvSTATE (coro_current);
2340 coro->cctx->idle_sp = 0;
2341
2342void
2343swap_defsv (Coro::State self)
2344 PROTOTYPE: $
2345 ALIAS:
2346 swap_defav = 1
2347 CODE:
2348 if (!self->slot)
2349 croak ("cannot swap state with coroutine that has no saved state,");
2350 else
2351 {
2352 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2353 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354
2355 SV *tmp = *src; *src = *dst; *dst = tmp;
2356 }
1638 2357
1639MODULE = Coro::State PACKAGE = Coro 2358MODULE = Coro::State PACKAGE = Coro
1640 2359
1641BOOT: 2360BOOT:
1642{ 2361{
1643 int i; 2362 int i;
1644 2363
1645 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1646 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1647 av_async_pool = get_av ("Coro::async_pool", TRUE); 2364 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1648 2367
1649 coro_current = get_sv ("Coro::current", FALSE); 2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1650 SvREADONLY_on (coro_current); 2369 SvREADONLY_on (coro_current);
1651 2370
1652 coro_stash = gv_stashpv ("Coro", TRUE); 2371 coro_stash = gv_stashpv ("Coro", TRUE);
1653 2372
1654 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1655 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1656 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1657 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1660 2379
1661 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1662 coro_ready[i] = newAV (); 2381 coro_ready[i] = newAV ();
1663 2382
1664 { 2383 {
1665 SV *sv = perl_get_sv("Coro::API", 1); 2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1666 2385
1667 coroapi.schedule = api_schedule; 2386 coroapi.schedule = api_schedule;
1668 coroapi.cede = api_cede; 2387 coroapi.cede = api_cede;
1669 coroapi.cede_notself = api_cede_notself; 2388 coroapi.cede_notself = api_cede_notself;
1670 coroapi.ready = api_ready; 2389 coroapi.ready = api_ready;
1671 coroapi.is_ready = api_is_ready; 2390 coroapi.is_ready = api_is_ready;
1672 coroapi.nready = &coro_nready; 2391 coroapi.nready = coro_nready;
1673 coroapi.current = coro_current; 2392 coroapi.current = coro_current;
1674 2393
1675 GCoroAPI = &coroapi; 2394 GCoroAPI = &coroapi;
1676 sv_setiv (sv, (IV)&coroapi); 2395 sv_setiv (sv, (IV)&coroapi);
1677 SvREADONLY_on (sv); 2396 SvREADONLY_on (sv);
1678 } 2397 }
1679} 2398}
2399
2400void
2401schedule (...)
2402 CODE:
2403 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2404
2405void
2406cede (...)
2407 CODE:
2408 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2409
2410void
2411cede_notself (...)
2412 CODE:
2413 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1680 2414
1681void 2415void
1682_set_current (SV *current) 2416_set_current (SV *current)
1683 PROTOTYPE: $ 2417 PROTOTYPE: $
1684 CODE: 2418 CODE:
1685 SvREFCNT_dec (SvRV (coro_current)); 2419 SvREFCNT_dec (SvRV (coro_current));
1686 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2420 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2421
2422void
2423_set_readyhook (SV *hook)
2424 PROTOTYPE: $
2425 CODE:
2426 LOCK;
2427 SvREFCNT_dec (coro_readyhook);
2428 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2429 UNLOCK;
1687 2430
1688int 2431int
1689prio (Coro::State coro, int newprio = 0) 2432prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$
1690 ALIAS: 2434 ALIAS:
1691 nice = 1 2435 nice = 1
1692 CODE: 2436 CODE:
1693{ 2437{
1694 RETVAL = coro->prio; 2438 RETVAL = coro->prio;
… …
1709 2453
1710SV * 2454SV *
1711ready (SV *self) 2455ready (SV *self)
1712 PROTOTYPE: $ 2456 PROTOTYPE: $
1713 CODE: 2457 CODE:
1714 RETVAL = boolSV (api_ready (self)); 2458 RETVAL = boolSV (api_ready (aTHX_ self));
1715 OUTPUT: 2459 OUTPUT:
1716 RETVAL 2460 RETVAL
1717 2461
1718int 2462int
1719nready (...) 2463nready (...)
… …
1734 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1735 AV *invoke_av; 2479 AV *invoke_av;
1736 int i, len; 2480 int i, len;
1737 2481
1738 if (!invoke) 2482 if (!invoke)
2483 {
2484 SV *old = PL_diehook;
2485 PL_diehook = 0;
2486 SvREFCNT_dec (old);
1739 croak ("\3terminate\2\n"); 2487 croak ("\3async_pool terminate\2\n");
2488 }
1740 2489
1741 SvREFCNT_dec (coro->saved_deffh); 2490 SvREFCNT_dec (coro->saved_deffh);
1742 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1743 2492
1744 hv_store (hv, "desc", sizeof ("desc") - 1, 2493 hv_store (hv, "desc", sizeof ("desc") - 1,
1745 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1746 2495
1747 invoke_av = (AV *)SvRV (invoke); 2496 invoke_av = (AV *)SvRV (invoke);
… …
1751 2500
1752 if (len > 0) 2501 if (len > 0)
1753 { 2502 {
1754 av_fill (defav, len - 1); 2503 av_fill (defav, len - 1);
1755 for (i = 0; i < len; ++i) 2504 for (i = 0; i < len; ++i)
1756 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1757 } 2506 }
1758
1759 SvREFCNT_dec (invoke);
1760} 2507}
1761 2508
1762void 2509void
1763_pool_2 (SV *cb) 2510_pool_2 (SV *cb)
1764 CODE: 2511 CODE:
… …
1768 sv_setsv (cb, &PL_sv_undef); 2515 sv_setsv (cb, &PL_sv_undef);
1769 2516
1770 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1771 coro->saved_deffh = 0; 2518 coro->saved_deffh = 0;
1772 2519
1773 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1774 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2521 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2522 {
2523 SV *old = PL_diehook;
2524 PL_diehook = 0;
2525 SvREFCNT_dec (old);
1775 croak ("\3terminate\2\n"); 2526 croak ("\3async_pool terminate\2\n");
2527 }
1776 2528
1777 av_clear (GvAV (PL_defgv)); 2529 av_clear (GvAV (PL_defgv));
1778 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1779 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1780 2532
1781 coro->prio = 0; 2533 coro->prio = 0;
1782 2534
1783 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1784 api_trace (coro_current, 0); 2536 api_trace (aTHX_ coro_current, 0);
1785 2537
1786 av_push (av_async_pool, newSVsv (coro_current)); 2538 av_push (av_async_pool, newSVsv (coro_current));
1787} 2539}
1788 2540
2541#if 0
2542
2543void
2544_generator_call (...)
2545 PROTOTYPE: @
2546 PPCODE:
2547 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548 xxxx
2549 abort ();
2550
2551SV *
2552gensub (SV *sub, ...)
2553 PROTOTYPE: &;@
2554 CODE:
2555{
2556 struct coro *coro;
2557 MAGIC *mg;
2558 CV *xcv;
2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2560 int i;
2561
2562 CvGV (ncv) = CvGV (cv);
2563 CvFILE (ncv) = CvFILE (cv);
2564
2565 Newz (0, coro, 1, struct coro);
2566 coro->args = newAV ();
2567 coro->flags = CF_NEW;
2568
2569 av_extend (coro->args, items - 1);
2570 for (i = 1; i < items; i++)
2571 av_push (coro->args, newSVsv (ST (i)));
2572
2573 CvISXSUB_on (ncv);
2574 CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578 CvXSUB (ncv) = CvXSUB (xcv);
2579 CvANON_on (ncv);
2580
2581 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582 RETVAL = newRV_noinc ((SV *)ncv);
2583}
2584 OUTPUT:
2585 RETVAL
2586
2587#endif
2588
1789 2589
1790MODULE = Coro::State PACKAGE = Coro::AIO 2590MODULE = Coro::State PACKAGE = Coro::AIO
1791 2591
1792SV * 2592void
1793_get_state () 2593_get_state (SV *self)
2594 PROTOTYPE: $
1794 CODE: 2595 PPCODE:
1795{ 2596{
1796 struct io_state *data; 2597 AV *defav = GvAV (PL_defgv);
1797 2598 AV *av = newAV ();
2599 int i;
1798 RETVAL = newSV (sizeof (struct io_state)); 2600 SV *data_sv = newSV (sizeof (struct io_state));
1799 data = (struct io_state *)SvPVX (RETVAL); 2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1800 SvCUR_set (RETVAL, sizeof (struct io_state)); 2602 SvCUR_set (data_sv, sizeof (struct io_state));
1801 SvPOK_only (RETVAL); 2603 SvPOK_only (data_sv);
1802 2604
1803 data->errorno = errno; 2605 data->errorno = errno;
1804 data->laststype = PL_laststype; 2606 data->laststype = PL_laststype;
1805 data->laststatval = PL_laststatval; 2607 data->laststatval = PL_laststatval;
1806 data->statcache = PL_statcache; 2608 data->statcache = PL_statcache;
2609
2610 av_extend (av, AvFILLp (defav) + 1 + 1);
2611
2612 for (i = 0; i <= AvFILLp (defav); ++i)
2613 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2614
2615 av_push (av, data_sv);
2616
2617 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619 api_ready (aTHX_ self);
1807} 2620}
1808 OUTPUT:
1809 RETVAL
1810 2621
1811void 2622void
1812_set_state (char *data_) 2623_set_state (SV *state)
1813 PROTOTYPE: $ 2624 PROTOTYPE: $
1814 CODE: 2625 PPCODE:
1815{ 2626{
1816 struct io_state *data = (void *)data_; 2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
1817 2630
1818 errno = data->errorno; 2631 errno = data->errorno;
1819 PL_laststype = data->laststype; 2632 PL_laststype = data->laststype;
1820 PL_laststatval = data->laststatval; 2633 PL_laststatval = data->laststatval;
1821 PL_statcache = data->statcache; 2634 PL_statcache = data->statcache;
1822}
1823 2635
2636 EXTEND (SP, AvFILLp (av));
2637 for (i = 0; i < AvFILLp (av); ++i)
2638 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639}
2640
2641
2642MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644BOOT:
2645 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647void
2648_schedule (...)
2649 CODE:
2650{
2651 static int incede;
2652
2653 api_cede_notself (aTHX);
2654
2655 ++incede;
2656 while (coro_nready >= incede && api_cede (aTHX))
2657 ;
2658
2659 sv_setsv (sv_activity, &PL_sv_undef);
2660 if (coro_nready >= incede)
2661 {
2662 PUSHMARK (SP);
2663 PUTBACK;
2664 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665 SPAGAIN;
2666 }
2667
2668 --incede;
2669}
2670
2671
2672MODULE = Coro::State PACKAGE = PerlIO::cede
2673
2674BOOT:
2675 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676
2677MODULE = Coro::State PACKAGE = Coro::Semaphore
2678
2679SV *
2680new (SV *klass, SV *count_ = 0)
2681 CODE:
2682{
2683 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2684 AV *av = newAV ();
2685 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2686 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2687}
2688 OUTPUT:
2689 RETVAL
2690
2691SV *
2692count (SV *self)
2693 CODE:
2694 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2695 OUTPUT:
2696 RETVAL
2697
2698void
2699up (SV *self, int adjust = 1)
2700 ALIAS:
2701 adjust = 1
2702 CODE:
2703{
2704 AV *av = (AV *)SvRV (self);
2705 SV *count_sv = AvARRAY (av)[0];
2706 IV count = SvIVX (count_sv);
2707
2708 count += ix ? adjust : 1;
2709 SvIVX (count_sv) = count;
2710
2711 /* now wake up as many waiters as possible */
2712 while (count > 0 && AvFILLp (av) >= count)
2713 {
2714 SV *cb;
2715
2716 /* swap first two elements so we can shift a waiter */
2717 AvARRAY (av)[0] = AvARRAY (av)[1];
2718 AvARRAY (av)[1] = count_sv;
2719 cb = av_shift (av);
2720
2721 if (SvOBJECT (cb))
2722 api_ready (aTHX_ cb);
2723 else
2724 croak ("callbacks not yet supported");
2725
2726 SvREFCNT_dec (cb);
2727 }
2728}
2729
2730void
2731down (SV *self)
2732 CODE:
2733 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
2763 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
2765 for (i = 1; i <= AvFILLp (av); ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i]));
2767 }
2768}
2769

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