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Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 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
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 51#endif
77#define dSTACKLEVEL int stacklevel 52
78#define STACKLEVEL ((void *)&stacklevel) 53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
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
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
79 126
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 128
82#if __GNUC__ >= 3 129#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
84#else 133#else
85# define attribute(x) 134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
86#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
87 141
88#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
89 143
90#include "CoroAPI.h" 144#include "CoroAPI.h"
91 145
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
95static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
97# 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
98#else 155#else
156
99# define LOCK (void)0 157# define LOCK (void)0
100# define UNLOCK (void)0 158# define UNLOCK (void)0
101#endif
102 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
106static 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;
187
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
107 201
108static struct coro_cctx *cctx_first; 202static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 203static int cctx_count, cctx_idle;
110 204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
111/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 215typedef struct coro_cctx
216{
113 struct coro_cctx *next; 217 struct coro_cctx *next;
114 218
115 /* the stack */ 219 /* the stack */
116 void *sptr; 220 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 221 size_t ssize;
118 222
119 /* cpu state */ 223 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 226 JMPENV *top_env;
122 coro_context cctx; 227 coro_context cctx;
123 228
229 U32 gen;
124#if USE_VALGRIND 230#if CORO_USE_VALGRIND
125 int valgrind_id; 231 int valgrind_id;
126#endif 232#endif
233 unsigned char flags;
127} coro_cctx; 234} coro_cctx;
128 235
129/* this is a structure representing a perl-level coroutine */ 236enum {
130struct coro { 237 CF_RUNNING = 0x0001, /* coroutine is running */
131 /* the c coroutine allocated to this perl coroutine, if any */ 238 CF_READY = 0x0002, /* coroutine is ready */
132 coro_cctx *cctx; 239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
133 242
134 /* data associated with this coroutine (initial args) */ 243/* the structure where most of the perl state is stored, overlaid on the cxstack */
135 AV *args; 244typedef struct
136 int refcnt; 245{
137 246 SV *defsv;
138 /* optionally saved, might be zero */
139 AV *defav; 247 AV *defav;
140 SV *defsv;
141 SV *errsv; 248 SV *errsv;
142 249 SV *irsgv;
143#define VAR(name,type) type name; 250#define VAR(name,type) type name;
144# include "state.h" 251# include "state.h"
145#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 */
271
272 /* statistics */
273 int usecount; /* number of transfers to this coro */
146 274
147 /* coro process data */ 275 /* coro process data */
148 int prio; 276 int prio;
277 SV *throw; /* exception to be thrown */
278
279 /* async_pool */
280 SV *saved_deffh;
281
282 /* linked list */
283 struct coro *next, *prev;
149}; 284};
150 285
151typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
152typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
153 288
289static struct CoroSLF slf_frame; /* the current slf frame */
290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
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
154static AV * 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}
338
339static AV *
155coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
156{ 341{
157 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
158 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
159 344
160 newpadlist = newAV (); 345 newpadlist = newAV ();
161 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
162#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
163 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164#else 349#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#endif 351#endif
167 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
168 --AvFILLp (padlist); 353 --AvFILLp (padlist);
169 354
170 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
172 357
173 return newpadlist; 358 return newpadlist;
174} 359}
175 360
176static void 361static void
177free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
178{ 363{
179 /* may be during global destruction */ 364 /* may be during global destruction */
180 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
181 { 366 {
182 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
203 AV *padlist; 388 AV *padlist;
204 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
205 390
206 /* casting is fun. */ 391 /* casting is fun. */
207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
209 394
210 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
211 396
212 return 0; 397 return 0;
213} 398}
214 399
215#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
216 402
217static 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};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
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 *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
218 443
219/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
220static void 445static void
221get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
222{ 447{
223 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
224 450
225 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
226 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227 else 453 else
228 { 454 {
229#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
230 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
231 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
232 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
233 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
234 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
235#else 462#else
236 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237#endif 464#endif
238 } 465 }
239} 466}
240 467
241static void 468static void
242put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
243{ 470{
244 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
245 473
246 if (!mg) 474 if (expect_false (!mg))
247 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
248 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250 mg->mg_virtual = &vtbl_coro;
251 mg->mg_obj = (SV *)newAV ();
252 }
253 476
254 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
255}
256 478
257#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
258#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
259 481
260#define LOAD(state) load_state((state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261#define SAVE(state,flags) save_state((state),(flags)); 483}
262 484
263#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
264 486
265static void 487static void
266load_state(Coro__State c) 488load_perl (pTHX_ Coro__State c)
267{ 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
268#define VAR(name,type) PL_ ## name = c->name; 500 #define VAR(name,type) PL_ ## name = slot->name;
269# include "state.h" 501 # include "state.h"
270#undef VAR 502 #undef VAR
271
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275 503
276 { 504 {
277 dSP; 505 dSP;
506
278 CV *cv; 507 CV *cv;
279 508
280 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
282 { 511 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
289 } 514 CvPADLIST (cv) = (AV *)POPs;
290
291 ++CvDEPTH(cv);
292 } 515 }
293 516
294 PUTBACK; 517 PUTBACK;
295 } 518 }
296}
297 519
520 slf_frame = c->slf_frame;
521}
522
298static void 523static void
299save_state(Coro__State c, int flags) 524save_perl (pTHX_ Coro__State c)
300{ 525{
526 c->slf_frame = slf_frame;
527
301 { 528 {
302 dSP; 529 dSP;
303 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
304 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
305 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
307 /* 534 /*
308 * the worst thing you can imagine happens first - we have to save 535 * the worst thing you can imagine happens first - we have to save
309 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
310 */ 537 */
311 538
312 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
313 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
314 for (;;) 541 for (;;)
315 { 542 {
316 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
317 { 544 {
318 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
319 546
320 if (CxTYPE(cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
321 { 548 {
322 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
550
323 if (CvDEPTH(cv)) 551 if (expect_true (CvDEPTH (cv)))
324 { 552 {
325 EXTEND (SP, CvDEPTH(cv)*2); 553 EXTEND (SP, 3);
326
327 while (--CvDEPTH(cv))
328 {
329 /* this tells the restore code to increment CvDEPTH */
330 PUSHs (Nullsv);
331 PUSHs ((SV *)cv);
332 }
333
334 PUSHs ((SV *)CvPADLIST(cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
335 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
336 557
558 CvDEPTH (cv) = 0;
337 get_padlist (cv); 559 get_padlist (aTHX_ cv);
338 } 560 }
339 } 561 }
340#ifdef CXt_FORMAT
341 else if (CxTYPE(cx) == CXt_FORMAT)
342 {
343 /* I never used formats, so how should I know how these are implemented? */
344 /* my bold guess is as a simple, plain sub... */
345 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346 }
347#endif
348 } 562 }
349 563
350 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
351 break; 565 break;
352 566
353 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
354 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
355 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
356 } 570 }
357 571
358 PUTBACK; 572 PUTBACK;
359 } 573 }
360 574
361 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
362 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
363 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 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 */
364 586
587 c->mainstack = PL_mainstack;
588
589 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591
592 slot->defav = GvAV (PL_defgv);
593 slot->defsv = DEFSV;
594 slot->errsv = ERRSV;
595 slot->irsgv = GvSV (irsgv);
596
365#define VAR(name,type)c->name = PL_ ## name; 597 #define VAR(name,type) slot->name = PL_ ## name;
366# include "state.h" 598 # include "state.h"
367#undef VAR 599 #undef VAR
600 }
368} 601}
369 602
370/* 603/*
371 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
372 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
373 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
374 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
375 */ 608 */
609#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks
611#else
376static void 612static void
377coro_init_stacks () 613coro_init_stacks (pTHX)
378{ 614{
379 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 615 PL_curstackinfo = new_stackinfo(32, 8);
380 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
381 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
382 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383 619
384 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
385 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
386 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387 623
388 New(50,PL_tmps_stack,96,SV*); 624 New(50,PL_tmps_stack,32,SV*);
389 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
390 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
391 PL_tmps_max = 96; 627 PL_tmps_max = 32;
392 628
393 New(54,PL_markstack,16,I32); 629 New(54,PL_markstack,16,I32);
394 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
395 PL_markstack_max = PL_markstack + 16; 631 PL_markstack_max = PL_markstack + 16;
396 632
397#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
398 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
399#endif 635#endif
400 636
401 New(54,PL_scopestack,16,I32); 637 New(54,PL_scopestack,8,I32);
402 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
403 PL_scopestack_max = 16; 639 PL_scopestack_max = 8;
404 640
405 New(54,PL_savestack,96,ANY); 641 New(54,PL_savestack,24,ANY);
406 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
407 PL_savestack_max = 96; 643 PL_savestack_max = 24;
408 644
409#if !PERL_VERSION_ATLEAST (5,9,0) 645#if !PERL_VERSION_ATLEAST (5,10,0)
410 New(54,PL_retstack,8,OP*); 646 New(54,PL_retstack,4,OP*);
411 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
412 PL_retstack_max = 8; 648 PL_retstack_max = 4;
413#endif 649#endif
414} 650}
651#endif
415 652
416/* 653/*
417 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
418 */ 655 */
419static void 656static void
420coro_destroy_stacks () 657coro_destruct_stacks (pTHX)
421{ 658{
422 if (!IN_DESTRUCT)
423 {
424 /* is this ugly, I ask? */
425 LEAVE_SCOPE (0);
426
427 /* sure it is, but more important: is it correct?? :/ */
428 FREETMPS;
429
430 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
431 }
432
433 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
434 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
435 661
436 while (PL_curstackinfo) 662 while (PL_curstackinfo)
437 { 663 {
438 PERL_SI *p = PL_curstackinfo->si_prev; 664 PERL_SI *p = PL_curstackinfo->si_prev;
439 665
440 { /*D*//*remove*/
441 dSP;
442 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443 PUTBACK; /* possibly superfluous */
444 }
445
446 if (!IN_DESTRUCT) 666 if (!IN_DESTRUCT)
447 {
448 dounwind (-1);/*D*//*remove*/
449 SvREFCNT_dec (PL_curstackinfo->si_stack); 667 SvREFCNT_dec (PL_curstackinfo->si_stack);
450 }
451 668
452 Safefree (PL_curstackinfo->si_cxstack); 669 Safefree (PL_curstackinfo->si_cxstack);
453 Safefree (PL_curstackinfo); 670 Safefree (PL_curstackinfo);
454 PL_curstackinfo = p; 671 PL_curstackinfo = p;
455 } 672 }
456 673
457 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
458 Safefree (PL_markstack); 675 Safefree (PL_markstack);
459 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
460 Safefree (PL_savestack); 677 Safefree (PL_savestack);
461#if !PERL_VERSION_ATLEAST (5,9,0) 678#if !PERL_VERSION_ATLEAST (5,10,0)
462 Safefree (PL_retstack); 679 Safefree (PL_retstack);
463#endif 680#endif
464} 681}
465 682
683static size_t
684coro_rss (pTHX_ struct coro *coro)
685{
686 size_t rss = sizeof (*coro);
687
688 if (coro->mainstack)
689 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING)
694 {
695 slot = &tmp_slot;
696
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
700 }
701 else
702 slot = coro->slot;
703
704 if (slot)
705 {
706 rss += sizeof (slot->curstackinfo);
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 }
718 }
719
720 return rss;
721}
722
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 */
466static void 745static int
467setup_coro (struct coro *coro) 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}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
468{ 830{
469 /* 831 /*
470 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
471 */ 833 */
472
473 coro_init_stacks (); 834 coro_init_stacks (aTHX);
474 835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
475 PL_curcop = 0; 839 PL_comppad = 0;
476 PL_in_eval = 0;
477 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 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);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
478 859
479 { 860 {
480 dSP; 861 dSP;
481 LOGOP myop; 862 UNOP myop;
482 863
483 /* I have no idea why this is needed, but it is */
484 PUSHMARK (SP);
485
486 SvREFCNT_dec (GvAV (PL_defgv));
487 GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
490 myop.op_next = Nullop; 865 myop.op_next = Nullop;
491 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
492 867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
493 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
494
495 PUSHMARK (SP);
496 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497 PUTBACK;
498 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499 SPAGAIN; 873 SPAGAIN;
500
501 ENTER; /* necessary e.g. for dounwind */
502 } 874 }
503}
504 875
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
505static void 883static void
884coro_destruct (pTHX_ struct coro *coro)
885{
886 if (!IN_DESTRUCT)
887 {
888 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0);
890 assert (PL_tmps_floor == -1);
891
892 /* free all temporaries */
893 FREETMPS;
894 assert (PL_tmps_ix == -1);
895
896 /* unwind all extra stacks */
897 POPSTACK_TO (PL_mainstack);
898
899 /* unwind main stack */
900 dounwind (-1);
901 }
902
903 SvREFCNT_dec (GvSV (PL_defgv));
904 SvREFCNT_dec (GvAV (PL_defgv));
905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
915
916 coro_destruct_stacks (aTHX);
917}
918
919INLINE void
506free_coro_mortal () 920free_coro_mortal (pTHX)
507{ 921{
508 if (coro_mortal) 922 if (expect_true (coro_mortal))
509 { 923 {
510 SvREFCNT_dec (coro_mortal); 924 SvREFCNT_dec (coro_mortal);
511 coro_mortal = 0; 925 coro_mortal = 0;
512 } 926 }
513} 927}
514 928
929static int
930runops_trace (pTHX)
931{
932 COP *oldcop = 0;
933 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 {
939 PERL_ASYNC_CHECK ();
940
941 if (cctx->flags & CC_TRACE_ALL)
942 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
944 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top;
947 AV *av = newAV (); /* return values */
948 SV **cb;
949 dSP;
950
951 GV *gv = CvGV (cx->blk_sub.cv);
952 SV *fullname = sv_2mortal (newSV (0));
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 bot = PL_stack_base + cx->blk_oldsp + 1;
957 top = cx->blk_gimme == G_ARRAY ? SP + 1
958 : cx->blk_gimme == G_SCALAR ? bot + 1
959 : bot;
960
961 av_extend (av, top - bot);
962 while (bot < top)
963 av_push (av, SvREFCNT_inc_NN (*bot++));
964
965 PL_runops = RUNOPS_DEFAULT;
966 ENTER;
967 SAVETMPS;
968 EXTEND (SP, 3);
969 PUSHMARK (SP);
970 PUSHs (&PL_sv_no);
971 PUSHs (fullname);
972 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
973 PUTBACK;
974 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
975 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
976 SPAGAIN;
977 FREETMPS;
978 LEAVE;
979 PL_runops = runops_trace;
980 }
981
982 if (oldcop != PL_curcop)
983 {
984 oldcop = PL_curcop;
985
986 if (PL_curcop != &PL_compiling)
987 {
988 SV **cb;
989
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
991 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 {
996 runops_proc_t old_runops = PL_runops;
997 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0));
1000
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 ENTER;
1006 SAVETMPS;
1007 EXTEND (SP, 3);
1008 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN;
1016 FREETMPS;
1017 LEAVE;
1018 PL_runops = runops_trace;
1019 }
1020
1021 oldcxix = cxstack_ix;
1022 }
1023
1024 if (cctx->flags & CC_TRACE_LINE)
1025 {
1026 dSP;
1027
1028 PL_runops = RUNOPS_DEFAULT;
1029 ENTER;
1030 SAVETMPS;
1031 EXTEND (SP, 3);
1032 PL_runops = RUNOPS_DEFAULT;
1033 PUSHMARK (SP);
1034 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1035 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
1043 }
1044 }
1045 }
1046 }
1047 }
1048
1049 TAINT_NOT;
1050 return 0;
1051}
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
1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
515static void NOINLINE 1064static void NOINLINE
516prepare_cctx (coro_cctx *cctx) 1065cctx_prepare (pTHX_ coro_cctx *cctx)
517{ 1066{
518 dSP; 1067 dSP;
519 LOGOP myop; 1068 UNOP myop;
520 1069
1070 PL_top_env = &PL_start_env;
1071
1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
1074
521 Zero (&myop, 1, LOGOP); 1075 Zero (&myop, 1, UNOP);
522 myop.op_next = PL_op; 1076 myop.op_next = PL_op;
523 myop.op_flags = OPf_WANT_VOID; 1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
524
525 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526 1078
527 PUSHMARK (SP); 1079 PUSHMARK (SP);
1080 EXTEND (SP, 2);
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
528 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529 PUTBACK; 1083 PUTBACK;
1084 PL_op = (OP *)&myop;
530 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531 SPAGAIN; 1086 SPAGAIN;
532} 1087}
533 1088
534static void 1089/* the tail of transfer: execute stuff we can only do after a transfer */
535coro_run (void *arg) 1090INLINE void
1091transfer_tail (pTHX)
536{ 1092{
537 /* coro_run is the alternative epilogue of transfer() */ 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);
538 UNLOCK; 1098 UNLOCK;
539 1099
540 /* 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
1110/*
541 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
542 */ 1112 */
543 PL_top_env = &PL_start_env; 1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
544 1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
545 /* inject call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
546 prepare_cctx ((coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
547 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
548 /* somebody will hit me for both perl_run and PL_restartop */ 1135 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op;
549 perl_run (PL_curinterp); 1137 perl_run (PL_curinterp);
550 1138
551 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1139 /*
552 abort (); 1140 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept
1145 */
1146 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
553} 1149}
554 1150
555static coro_cctx * 1151static coro_cctx *
556cctx_new () 1152cctx_new ()
557{ 1153{
558 coro_cctx *cctx; 1154 coro_cctx *cctx;
559 1155
560 ++cctx_count; 1156 ++cctx_count;
561
562 New (0, cctx, 1, coro_cctx); 1157 New (0, cctx, 1, coro_cctx);
563 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 ();
1183 void *stack_start;
1184 size_t stack_size;
1185
564#if HAVE_MMAP 1186#if HAVE_MMAP
565
566 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567 /* mmap suppsedly does allocate-on-write for us */ 1188 /* mmap supposedly does allocate-on-write for us */
568 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);
569 1190
570 if (cctx->sptr == (void *)-1) 1191 if (cctx->sptr != (void *)-1)
1192 {
1193 #if CORO_STACKGUARD
1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1195 #endif
1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1198 cctx->flags |= CC_MAPPED;
571 { 1199 }
1200 else
1201#endif
1202 {
1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1204 New (0, cctx->sptr, cctx_stacksize, long);
1205
1206 if (!cctx->sptr)
1207 {
572 perror ("FATAL: unable to mmap stack for coroutine"); 1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
573 _exit (EXIT_FAILURE); 1209 _exit (EXIT_FAILURE);
574 } 1210 }
575 1211
576# if STACKGUARD 1212 stack_start = cctx->sptr;
577 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1213 stack_size = cctx->ssize;
578# endif
579
580#else
581
582 cctx->ssize = STACKSIZE * (long)sizeof (long);
583 New (0, cctx->sptr, STACKSIZE, long);
584
585 if (!cctx->sptr)
586 { 1214 }
587 perror ("FATAL: unable to malloc stack for coroutine");
588 _exit (EXIT_FAILURE);
589 }
590 1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
591#endif 1218 #endif
592 1219
593#if USE_VALGRIND 1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
594 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
595 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596 cctx->ssize + (char *)cctx->sptr
597 );
598#endif
599
600 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
601 1221
602 return cctx; 1222 return cctx;
603} 1223}
604 1224
605static void 1225static void
606cctx_free (coro_cctx *cctx) 1226cctx_destroy (coro_cctx *cctx)
607{ 1227{
608 if (!cctx) 1228 if (!cctx)
609 return; 1229 return;
610 1230
611 --cctx_count; 1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
612 1233
613#if USE_VALGRIND 1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
614 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615#endif 1239 #endif
616 1240
617#if HAVE_MMAP 1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
618 munmap (cctx->sptr, cctx->ssize); 1243 munmap (cctx->sptr, cctx->ssize);
619#else 1244 else
1245#endif
620 Safefree (cctx->sptr); 1246 Safefree (cctx->sptr);
621#endif 1247 }
622 1248
623 Safefree (cctx); 1249 Safefree (cctx);
624} 1250}
625 1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
626static coro_cctx * 1255static coro_cctx *
627cctx_get () 1256cctx_get (pTHX)
628{ 1257{
629 coro_cctx *cctx; 1258 while (expect_true (cctx_first))
630
631 if (cctx_first)
632 { 1259 {
1260 coro_cctx *cctx = cctx_first;
1261 cctx_first = cctx->next;
633 --cctx_idle; 1262 --cctx_idle;
634 cctx = cctx_first; 1263
635 cctx_first = cctx->next; 1264 if (expect_true (!CCTX_EXPIRED (cctx)))
636 } 1265 return cctx;
637 else 1266
638 { 1267 cctx_destroy (cctx);
639 cctx = cctx_new ();
640 PL_op = PL_op->op_next;
641 } 1268 }
642 1269
643 return cctx; 1270 return cctx_new_run ();
644} 1271}
645 1272
646static void 1273static void
647cctx_put (coro_cctx *cctx) 1274cctx_put (coro_cctx *cctx)
648{ 1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
1278 /* free another cctx if overlimit */
1279 if (expect_false (cctx_idle >= cctx_max_idle))
1280 {
1281 coro_cctx *first = cctx_first;
1282 cctx_first = first->next;
1283 --cctx_idle;
1284
1285 cctx_destroy (first);
1286 }
1287
649 ++cctx_idle; 1288 ++cctx_idle;
650 cctx->next = cctx_first; 1289 cctx->next = cctx_first;
651 cctx_first = cctx; 1290 cctx_first = cctx;
652} 1291}
653 1292
654/* never call directly, always through the coro_state_transfer global variable */ 1293/** coroutine switching *****************************************************/
1294
1295static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{
1298 if (expect_true (prev != next))
1299 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
1313 }
1314}
1315
1316/* always use the TRANSFER macro */
655static void NOINLINE 1317static void NOINLINE
656transfer (struct coro *prev, struct coro *next, int flags) 1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
657{ 1319{
658 dSTACKLEVEL; 1320 dSTACKLEVEL;
659 1321
660 /* sometimes transfer is only called to set idle_sp */ 1322 /* sometimes transfer is only called to set idle_sp */
661 if (flags == TRANSFER_SET_STACKLEVEL) 1323 if (expect_false (!next))
662 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1324 {
1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 }
663 else if (prev != next) 1328 else if (expect_true (prev != next))
664 { 1329 {
665 coro_cctx *prev__cctx; 1330 coro_cctx *prev__cctx;
666 1331
1332 if (expect_false (prev->flags & CF_NEW))
1333 {
1334 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING;
1338 }
1339
1340 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING;
1342
667 LOCK; 1343 LOCK;
668 1344
669 if (next->mainstack) 1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
1348 if (expect_false (next->flags & CF_NEW))
670 { 1349 {
671 /* coroutine already started */ 1350 /* need to start coroutine */
672 SAVE (prev, flags); 1351 next->flags &= ~CF_NEW;
673 LOAD (next); 1352 /* setup coroutine call */
1353 coro_setup (aTHX_ next);
674 } 1354 }
675 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 ))
676 { 1366 {
677 /* need to start coroutine */ 1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
678 /* first get rid of the old state */ 1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
679 SAVE (prev, -1); 1369
680 /* setup coroutine call */
681 setup_coro (next);
682 /* need a stack */
683 next->cctx = 0; 1370 prev->cctx = 0;
1371
1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1376 next->cctx = cctx_get (aTHX);
1377
1378 cctx_put (prev__cctx);
684 } 1379 }
685 1380
686 if (!prev->cctx) 1381 ++next->usecount;
687 /* create a new empty context */
688 Newz (0, prev->cctx, 1, coro_cctx);
689 1382
690 prev__cctx = prev->cctx;
691
692 /* possibly "free" the cctx */
693 if (prev__cctx->idle_sp == STACKLEVEL)
694 {
695 cctx_put (prev__cctx);
696 prev->cctx = 0;
697 }
698
699 if (!next->cctx) 1383 if (expect_true (!next->cctx))
700 next->cctx = cctx_get (); 1384 next->cctx = cctx_get (aTHX);
701 1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1388
702 if (prev__cctx != next->cctx) 1389 if (expect_false (prev__cctx != next->cctx))
703 { 1390 {
704 prev__cctx->top_env = PL_top_env; 1391 prev__cctx->top_env = PL_top_env;
705 PL_top_env = next->cctx->top_env; 1392 PL_top_env = next->cctx->top_env;
706 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707 } 1394 }
708 1395
709 free_coro_mortal (); 1396 transfer_tail (aTHX);
1397 }
1398}
710 1399
1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1402
1403/** high level stuff ********************************************************/
1404
1405static int
1406coro_state_destroy (pTHX_ struct coro *coro)
1407{
1408 if (coro->flags & CF_DESTROYED)
1409 return 0;
1410
1411 coro->flags |= CF_DESTROYED;
1412
1413 if (coro->flags & CF_READY)
1414 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready;
711 UNLOCK; 1419 UNLOCK;
712 } 1420 }
713} 1421 else
714 1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
715struct transfer_args
716{
717 struct coro *prev, *next;
718 int flags;
719};
720
721#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
722
723static void
724coro_state_destroy (struct coro *coro)
725{
726 if (coro->refcnt--)
727 return;
728 1423
729 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
730 { 1425 {
731 struct coro temp; 1426 struct coro temp;
732 1427
733 SAVE ((&temp), TRANSFER_SAVE_ALL); 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
734 LOAD (coro);
735 1429
736 coro_destroy_stacks (); 1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro);
737 1432
738 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1433 coro_destruct (aTHX_ coro);
739 1434
1435 load_perl (aTHX_ &temp);
1436
740 coro->mainstack = 0; 1437 coro->slot = 0;
741 } 1438 }
742 1439
743 cctx_free (coro->cctx); 1440 cctx_destroy (coro->cctx);
744 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
745 Safefree (coro); 1442
1443 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next;
1446
1447 return 1;
746} 1448}
747 1449
748static int 1450static int
749coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
750{ 1452{
751 struct coro *coro = (struct coro *)mg->mg_ptr; 1453 struct coro *coro = (struct coro *)mg->mg_ptr;
752 mg->mg_ptr = 0; 1454 mg->mg_ptr = 0;
753 1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
754 coro_state_destroy (coro); 1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
755 1463
756 return 0; 1464 return 0;
757} 1465}
758 1466
759static int 1467static int
… …
766 return 0; 1474 return 0;
767} 1475}
768 1476
769static MGVTBL coro_state_vtbl = { 1477static MGVTBL coro_state_vtbl = {
770 0, 0, 0, 0, 1478 0, 0, 0, 0,
771 coro_state_clear, 1479 coro_state_free,
772 0, 1480 0,
773#ifdef MGf_DUP 1481#ifdef MGf_DUP
774 coro_state_dup, 1482 coro_state_dup,
775#else 1483#else
776# define MGf_DUP 0 1484# define MGf_DUP 0
777#endif 1485#endif
778}; 1486};
779 1487
780static struct coro *
781SvSTATE (SV *coro)
782{
783 HV *stash;
784 MAGIC *mg;
785
786 if (SvROK (coro))
787 coro = SvRV (coro);
788
789 stash = SvSTASH (coro);
790 if (stash != coro_stash && stash != coro_state_stash)
791 {
792 /* very slow, but rare, check */
793 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794 croak ("Coro::State object required");
795 }
796
797 mg = SvMAGIC (coro);
798 assert (mg->mg_type == PERL_MAGIC_ext);
799 return (struct coro *)mg->mg_ptr;
800}
801
802static void 1488static void
803prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
804{ 1490{
805 ta->prev = SvSTATE (prev); 1491 ta->prev = SvSTATE (prev_sv);
806 ta->next = SvSTATE (next); 1492 ta->next = SvSTATE (next_sv);
807 ta->flags = flags; 1493 TRANSFER_CHECK (*ta);
808} 1494}
809 1495
810static void 1496static void
811api_transfer (SV *prev, SV *next, int flags) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
812{ 1498{
813 dTHX;
814 struct transfer_args ta; 1499 struct coro_transfer_args ta;
815 1500
816 prepare_transfer (&ta, prev, next, flags); 1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817 TRANSFER (ta); 1502 TRANSFER (ta, 1);
818} 1503}
819 1504
820/** Coro ********************************************************************/ 1505/** Coro ********************************************************************/
821 1506
822#define PRIO_MAX 3
823#define PRIO_HIGH 1
824#define PRIO_NORMAL 0
825#define PRIO_LOW -1
826#define PRIO_IDLE -3
827#define PRIO_MIN -4
828
829/* for Coro.pm */
830static GV *coro_current, *coro_idle;
831static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832static int coro_nready;
833
834static void 1507static void
835coro_enq (SV *sv) 1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
836{ 1515{
837 int prio; 1516 int prio;
838 1517
839 if (SvTYPE (sv) != SVt_PVHV) 1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
840 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
841 1521
842 prio = SvSTATE (sv)->prio; 1522 return 0;
1523}
843 1524
844 av_push (coro_ready [prio - PRIO_MIN], sv); 1525static int
1526api_ready (pTHX_ SV *coro_sv)
1527{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv);
1536
1537 if (coro->flags & CF_READY)
1538 return 0;
1539
1540 coro->flags |= CF_READY;
1541
1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
845 coro_nready++; 1548 ++coro_nready;
1549
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 ();
1570
1571 return 1;
1572}
1573
1574static int
1575api_is_ready (pTHX_ SV *coro_sv)
1576{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578}
1579
1580INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1582{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1633 LOCK;
1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1636 UNLOCK;
1637}
1638
1639INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{
1642 api_ready (aTHX_ coro_current);
1643 prepare_schedule (aTHX_ ta);
1644}
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
1669static int
1670api_cede (pTHX)
1671{
1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static int
1686api_cede_notself (pTHX)
1687{
1688 if (coro_nready)
1689 {
1690 struct coro_transfer_args ta;
1691
1692 prepare_cede_notself (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694 return 1;
1695 }
1696 else
1697 return 0;
1698}
1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
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);
846} 1761}
847 1762
848static SV * 1763static SV *
849coro_deq (int min_prio) 1764PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
850{ 1765{
851 int prio = PRIO_MAX - PRIO_MIN; 1766 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
852 1767
853 min_prio -= PRIO_MIN; 1768 return newSVnv (self->every);
854 if (min_prio < 0) 1769}
855 min_prio = 0;
856 1770
857 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1771static IV
858 if (AvFILLp (coro_ready [prio]) >= 0) 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)
859 { 1972 {
860 coro_nready--; 1973 if (sp == bot)
861 return av_shift (coro_ready [prio]); 1974 XPUSHs (&PL_sv_undef);
1975
1976 SP = bot + 1;
862 } 1977 }
863 1978
864 return 0;
865}
866
867static void
868api_ready (SV *coro)
869{
870 dTHX;
871
872 if (SvROK (coro))
873 coro = SvRV (coro);
874
875 LOCK;
876 coro_enq (SvREFCNT_inc (coro));
877 UNLOCK;
878}
879
880static void
881prepare_schedule (struct transfer_args *ta)
882{
883 SV *current, *prev, *next;
884
885 current = GvSV (coro_current);
886
887 for (;;)
888 {
889 LOCK;
890 next = coro_deq (PRIO_MIN);
891 UNLOCK;
892
893 if (next)
894 break;
895
896 {
897 dSP;
898
899 ENTER;
900 SAVETMPS;
901
902 PUSHMARK (SP);
903 PUTBACK; 1979 PUTBACK;
904 call_sv (GvSV (coro_idle), G_DISCARD); 1980 }
905 1981
906 FREETMPS; 1982 return NORMAL;
907 LEAVE; 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;
908 } 2030 }
2031 else
909 } 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 */
910 2037
911 prev = SvRV (current); 2038 for (i = 1; i <= AvFILLp (av); ++i)
912 SvRV (current) = next; 2039 if (AvARRAY (av)[i] == SvRV (coro_current))
2040 return 1;
913 2041
914 /* free this only after the transfer */ 2042 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
915 LOCK; 2043 return 1;
916 free_coro_mortal (); 2044 }
917 UNLOCK;
918 coro_mortal = prev;
919
920 ta->prev = SvSTATE (prev);
921 ta->next = SvSTATE (next);
922 ta->flags = TRANSFER_SAVE_ALL;
923} 2045}
924 2046
925static void 2047static void
926prepare_cede (struct transfer_args *ta) 2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
927{ 2049{
928 LOCK; 2050 AV *av = (AV *)SvRV (arg [0]);
929 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930 UNLOCK;
931 2051
932 prepare_schedule (ta); 2052 if (SvIVX (AvARRAY (av)[0]) > 0)
933} 2053 {
2054 frame->data = (void *)av;
2055 frame->prepare = prepare_nop;
2056 }
2057 else
2058 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
934 2060
935static void 2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
936api_schedule (void) 2062 frame->prepare = prepare_schedule;
937{ 2063 }
938 dTHX;
939 struct transfer_args ta;
940 2064
941 prepare_schedule (&ta); 2065 frame->check = slf_check_semaphore_down;
942 TRANSFER (ta);
943}
944 2066
945static void
946api_cede (void)
947{
948 dTHX;
949 struct transfer_args ta;
950
951 prepare_cede (&ta);
952 TRANSFER (ta);
953} 2067}
954 2068
955MODULE = Coro::State PACKAGE = Coro::State 2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956 2070
957PROTOTYPES: DISABLE 2071PROTOTYPES: DISABLE
958 2072
959BOOT: 2073BOOT:
960{ 2074{
961#ifdef USE_ITHREADS 2075#ifdef USE_ITHREADS
962 MUTEX_INIT (&coro_mutex); 2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT;
2079# endif
963#endif 2080#endif
964 BOOT_PAGESIZE; 2081 BOOT_PAGESIZE;
965 2082
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
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));
2093
966 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2094 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967 2095
968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2096 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2097 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2098 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2099 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
971 2100
972 main_mainstack = PL_mainstack; 2101 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env;
973 2103
2104 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev;
2106
974 coroapi.ver = CORO_API_VERSION; 2107 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION;
2109
975 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 }
976 2127
977 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
978} 2129}
979 2130
980SV * 2131SV *
981new (char *klass, ...) 2132new (char *klass, ...)
982 CODE: 2133 CODE:
983{ 2134{
984 struct coro *coro; 2135 struct coro *coro;
2136 MAGIC *mg;
985 HV *hv; 2137 HV *hv;
986 int i; 2138 int i;
987 2139
988 Newz (0, coro, 1, struct coro); 2140 Newz (0, coro, 1, struct coro);
989 coro->args = newAV (); 2141 coro->args = newAV ();
2142 coro->flags = CF_NEW;
990 2143
2144 if (coro_first) coro_first->prev = coro;
2145 coro->next = coro_first;
2146 coro_first = coro;
2147
991 hv = newHV (); 2148 coro->hv = hv = newHV ();
992 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;
993 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994 2152
2153 av_extend (coro->args, items - 1);
995 for (i = 1; i < items; i++) 2154 for (i = 1; i < items; i++)
996 av_push (coro->args, newSVsv (ST (i))); 2155 av_push (coro->args, newSVsv (ST (i)));
997} 2156}
998 OUTPUT: 2157 OUTPUT:
999 RETVAL 2158 RETVAL
1000 2159
1001void 2160void
1002_set_stacklevel (...) 2161_set_stacklevel (...)
1003 ALIAS: 2162 CODE:
1004 Coro::State::transfer = 1 2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1005 Coro::schedule = 2
1006 Coro::cede = 3
1007 Coro::Cont::yield = 4
1008 CODE:
1009{
1010 struct transfer_args ta;
1011
1012 switch (ix)
1013 {
1014 case 0:
1015 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1016 ta.next = 0;
1017 ta.flags = TRANSFER_SET_STACKLEVEL;
1018 break;
1019
1020 case 1:
1021 if (items != 3)
1022 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1023
1024 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1025 break;
1026
1027 case 2:
1028 prepare_schedule (&ta);
1029 break;
1030
1031 case 3:
1032 prepare_cede (&ta);
1033 break;
1034
1035 case 4:
1036 {
1037 SV *yieldstack;
1038 SV *sv;
1039 AV *defav = GvAV (PL_defgv);
1040
1041 yieldstack = *hv_fetch (
1042 (HV *)SvRV (GvSV (coro_current)),
1043 "yieldstack", sizeof ("yieldstack") - 1,
1044 0
1045 );
1046
1047 /* set up @_ -- ugly */
1048 av_clear (defav);
1049 av_fill (defav, items - 1);
1050 while (items--)
1051 av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053 sv = av_pop ((AV *)SvRV (yieldstack));
1054 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056 ta.flags = 0;
1057 SvREFCNT_dec (sv);
1058 }
1059 break;
1060
1061 }
1062
1063 TRANSFER (ta);
1064}
1065 2164
1066void 2165void
1067_clone_state_from (SV *dst, SV *src) 2166transfer (...)
2167 PROTOTYPE: $$
1068 CODE: 2168 CODE:
1069{ 2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1070 struct coro *coro_src = SvSTATE (src);
1071 2170
1072 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2171bool
1073 2172_destroy (SV *coro_sv)
1074 ++coro_src->refcnt; 2173 CODE:
1075 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1076} 2175 OUTPUT:
2176 RETVAL
1077 2177
1078void 2178void
1079_exit (code) 2179_exit (int code)
1080 int code
1081 PROTOTYPE: $ 2180 PROTOTYPE: $
1082 CODE: 2181 CODE:
1083 _exit (code); 2182 _exit (code);
1084 2183
1085int 2184int
2185cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$
2187 CODE:
2188 RETVAL = cctx_stacksize;
2189 if (new_stacksize)
2190 {
2191 cctx_stacksize = new_stacksize;
2192 ++cctx_gen;
2193 }
2194 OUTPUT:
2195 RETVAL
2196
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
1086cctx_count () 2208cctx_count ()
2209 PROTOTYPE:
1087 CODE: 2210 CODE:
1088 RETVAL = cctx_count; 2211 RETVAL = cctx_count;
1089 OUTPUT: 2212 OUTPUT:
1090 RETVAL 2213 RETVAL
1091 2214
1092int 2215int
1093cctx_idle () 2216cctx_idle ()
2217 PROTOTYPE:
1094 CODE: 2218 CODE:
1095 RETVAL = cctx_idle; 2219 RETVAL = cctx_idle;
1096 OUTPUT: 2220 OUTPUT:
1097 RETVAL 2221 RETVAL
1098 2222
2223void
2224list ()
2225 PROTOTYPE:
2226 PPCODE:
2227{
2228 struct coro *coro;
2229 for (coro = coro_first; coro; coro = coro->next)
2230 if (coro->hv)
2231 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2232}
2233
2234void
2235call (Coro::State coro, SV *coderef)
2236 ALIAS:
2237 eval = 1
2238 CODE:
2239{
2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2241 {
2242 struct coro temp;
2243
2244 if (!(coro->flags & CF_RUNNING))
2245 {
2246 PUTBACK;
2247 save_perl (aTHX_ &temp);
2248 load_perl (aTHX_ coro);
2249 }
2250
2251 {
2252 dSP;
2253 ENTER;
2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK;
2257 PUSHMARK (SP);
2258
2259 if (ix)
2260 eval_sv (coderef, 0);
2261 else
2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2263
2264 POPSTACK;
2265 SPAGAIN;
2266 FREETMPS;
2267 LEAVE;
2268 PUTBACK;
2269 }
2270
2271 if (!(coro->flags & CF_RUNNING))
2272 {
2273 save_perl (aTHX_ coro);
2274 load_perl (aTHX_ &temp);
2275 SPAGAIN;
2276 }
2277 }
2278}
2279
2280SV *
2281is_ready (Coro::State coro)
2282 PROTOTYPE: $
2283 ALIAS:
2284 is_ready = CF_READY
2285 is_running = CF_RUNNING
2286 is_new = CF_NEW
2287 is_destroyed = CF_DESTROYED
2288 CODE:
2289 RETVAL = boolSV (coro->flags & ix);
2290 OUTPUT:
2291 RETVAL
2292
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
2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags
2304
2305SV *
2306has_cctx (Coro::State coro)
2307 PROTOTYPE: $
2308 CODE:
2309 RETVAL = boolSV (!!coro->cctx);
2310 OUTPUT:
2311 RETVAL
2312
2313int
2314is_traced (Coro::State coro)
2315 PROTOTYPE: $
2316 CODE:
2317 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2318 OUTPUT:
2319 RETVAL
2320
2321UV
2322rss (Coro::State coro)
2323 PROTOTYPE: $
2324 ALIAS:
2325 usecount = 1
2326 CODE:
2327 switch (ix)
2328 {
2329 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2330 case 1: RETVAL = coro->usecount; break;
2331 }
2332 OUTPUT:
2333 RETVAL
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 }
2357
1099MODULE = Coro::State PACKAGE = Coro 2358MODULE = Coro::State PACKAGE = Coro
1100 2359
1101BOOT: 2360BOOT:
1102{ 2361{
1103 int i; 2362 int i;
1104 2363
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);
2367
2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2369 SvREADONLY_on (coro_current);
2370
1105 coro_stash = gv_stashpv ("Coro", TRUE); 2371 coro_stash = gv_stashpv ("Coro", TRUE);
1106 2372
1107 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2377 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2378 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113 2379
1114 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118 coro_ready[i] = newAV (); 2381 coro_ready[i] = newAV ();
1119 2382
1120 { 2383 {
1121 SV *sv = perl_get_sv("Coro::API", 1); 2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1122 2385
1123 coroapi.schedule = api_schedule; 2386 coroapi.schedule = api_schedule;
1124 coroapi.cede = api_cede; 2387 coroapi.cede = api_cede;
2388 coroapi.cede_notself = api_cede_notself;
1125 coroapi.ready = api_ready; 2389 coroapi.ready = api_ready;
2390 coroapi.is_ready = api_is_ready;
1126 coroapi.nready = &coro_nready; 2391 coroapi.nready = coro_nready;
1127 coroapi.current = coro_current; 2392 coroapi.current = coro_current;
1128 2393
1129 GCoroAPI = &coroapi; 2394 GCoroAPI = &coroapi;
1130 sv_setiv (sv, (IV)&coroapi); 2395 sv_setiv (sv, (IV)&coroapi);
1131 SvREADONLY_on (sv); 2396 SvREADONLY_on (sv);
1132 } 2397 }
1133} 2398}
1134 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);
2414
2415void
2416_set_current (SV *current)
2417 PROTOTYPE: $
2418 CODE:
2419 SvREFCNT_dec (SvRV (coro_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;
2430
1135int 2431int
1136prio (Coro::State coro, int newprio = 0) 2432prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$
1137 ALIAS: 2434 ALIAS:
1138 nice = 1 2435 nice = 1
1139 CODE: 2436 CODE:
1140{ 2437{
1141 RETVAL = coro->prio; 2438 RETVAL = coro->prio;
1142 2439
1143 if (items > 1) 2440 if (items > 1)
1144 { 2441 {
1145 if (ix) 2442 if (ix)
1146 newprio += coro->prio; 2443 newprio = coro->prio - newprio;
1147 2444
1148 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2445 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2446 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150 2447
1151 coro->prio = newprio; 2448 coro->prio = newprio;
1152 } 2449 }
1153} 2450}
2451 OUTPUT:
2452 RETVAL
1154 2453
1155void 2454SV *
1156ready (SV *self) 2455ready (SV *self)
1157 PROTOTYPE: $ 2456 PROTOTYPE: $
1158 CODE: 2457 CODE:
1159 api_ready (self); 2458 RETVAL = boolSV (api_ready (aTHX_ self));
2459 OUTPUT:
2460 RETVAL
1160 2461
1161int 2462int
1162nready (...) 2463nready (...)
1163 PROTOTYPE: 2464 PROTOTYPE:
1164 CODE: 2465 CODE:
1165 RETVAL = coro_nready; 2466 RETVAL = coro_nready;
1166 OUTPUT: 2467 OUTPUT:
1167 RETVAL 2468 RETVAL
1168 2469
1169MODULE = Coro::State PACKAGE = Coro::AIO 2470# for async_pool speedup
2471void
2472_pool_1 (SV *cb)
2473 CODE:
2474{
2475 struct coro *coro = SvSTATE (coro_current);
2476 HV *hv = (HV *)SvRV (coro_current);
2477 AV *defav = GvAV (PL_defgv);
2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479 AV *invoke_av;
2480 int i, len;
2481
2482 if (!invoke)
2483 {
2484 SV *old = PL_diehook;
2485 PL_diehook = 0;
2486 SvREFCNT_dec (old);
2487 croak ("\3async_pool terminate\2\n");
2488 }
2489
2490 SvREFCNT_dec (coro->saved_deffh);
2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2492
2493 hv_store (hv, "desc", sizeof ("desc") - 1,
2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2495
2496 invoke_av = (AV *)SvRV (invoke);
2497 len = av_len (invoke_av);
2498
2499 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2500
2501 if (len > 0)
2502 {
2503 av_fill (defav, len - 1);
2504 for (i = 0; i < len; ++i)
2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2506 }
2507}
2508
2509void
2510_pool_2 (SV *cb)
2511 CODE:
2512{
2513 struct coro *coro = SvSTATE (coro_current);
2514
2515 sv_setsv (cb, &PL_sv_undef);
2516
2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518 coro->saved_deffh = 0;
2519
2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
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);
2526 croak ("\3async_pool terminate\2\n");
2527 }
2528
2529 av_clear (GvAV (PL_defgv));
2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532
2533 coro->prio = 0;
2534
2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536 api_trace (aTHX_ coro_current, 0);
2537
2538 av_push (av_async_pool, newSVsv (coro_current));
2539}
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 ();
1170 2550
1171SV * 2551SV *
1172_get_state () 2552gensub (SV *sub, ...)
1173 CODE: 2553 PROTOTYPE: &;@
2554 CODE:
1174{ 2555{
1175 struct { 2556 struct coro *coro;
1176 int errorno; 2557 MAGIC *mg;
1177 int laststype; 2558 CV *xcv;
1178 int laststatval; 2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1179 Stat_t statcache; 2560 int i;
1180 } data;
1181 2561
1182 data.errorno = errno; 2562 CvGV (ncv) = CvGV (cv);
1183 data.laststype = PL_laststype; 2563 CvFILE (ncv) = CvFILE (cv);
1184 data.laststatval = PL_laststatval;
1185 data.statcache = PL_statcache;
1186 2564
1187 RETVAL = newSVpvn ((char *)&data, sizeof data); 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);
1188} 2583}
1189 OUTPUT: 2584 OUTPUT:
1190 RETVAL 2585 RETVAL
1191 2586
2587#endif
2588
2589
2590MODULE = Coro::State PACKAGE = Coro::AIO
2591
1192void 2592void
1193_set_state (char *data_) 2593_get_state (SV *self)
1194 PROTOTYPE: $ 2594 PROTOTYPE: $
2595 PPCODE:
2596{
2597 AV *defav = GvAV (PL_defgv);
2598 AV *av = newAV ();
2599 int i;
2600 SV *data_sv = newSV (sizeof (struct io_state));
2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2602 SvCUR_set (data_sv, sizeof (struct io_state));
2603 SvPOK_only (data_sv);
2604
2605 data->errorno = errno;
2606 data->laststype = PL_laststype;
2607 data->laststatval = PL_laststatval;
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);
2620}
2621
2622void
2623_set_state (SV *state)
2624 PROTOTYPE: $
2625 PPCODE:
2626{
2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
2630
2631 errno = data->errorno;
2632 PL_laststype = data->laststype;
2633 PL_laststatval = data->laststatval;
2634 PL_statcache = data->statcache;
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 (...)
1195 CODE: 2649 CODE:
1196{ 2650{
1197 struct { 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 {
1198 int errorno; 2763 int i;
1199 int laststype; 2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
1200 int laststatval; 2765 for (i = 1; i <= AvFILLp (av); ++i)
1201 Stat_t statcache; 2766 PUSHs (newSVsv (AvARRAY (av)[i]));
1202 } *data = (void *)data_; 2767 }
1203
1204 errno = data->errorno;
1205 PL_laststype = data->laststype;
1206 PL_laststatval = data->laststatval;
1207 PL_statcache = data->statcache;
1208} 2768}
2769

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