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Comparing Coro/Coro/State.xs (file contents):
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC vs.
Revision 1.279 by root, Sun Nov 16 08:59:16 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 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 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
70/* 5.8.7 */ 101/* 5.8.7 */
71#ifndef SvRV_set 102#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 104#endif
74 105
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 107# undef CORO_STACKGUARD
77#endif 108#endif
78 109
79#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 111# define CORO_STACKGUARD 0
81#endif 112#endif
82 113
83/* prefer perl internal functions over our own? */ 114/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 115#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 117#endif
87 118
88/* The next macro should declare a variable stacklevel that contains and approximation 119/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 120 * portable way as possible. */
90 * and should be unique. */ 121#if __GNUC__ >= 4
91#define dSTACKLEVEL int stacklevel 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
92#define STACKLEVEL ((void *)&stacklevel) 123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
93 126
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
95 128
96#if __GNUC__ >= 3 129#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
99#else 133#else
100# define attribute(x) 134# define attribute(x)
101# define BARRIER 135# define expect(expr,value) (expr)
136# define INLINE static
102#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
103 141
104#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
105 143
106#include "CoroAPI.h" 144#include "CoroAPI.h"
107 145
108#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
109static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
111# 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
112#else 155#else
156
113# define LOCK (void)0 157# define LOCK (void)0
114# define UNLOCK (void)0 158# define UNLOCK (void)0
115#endif
116 159
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 */
117struct io_state 168struct io_state
118{ 169{
170 AV *res;
119 int errorno; 171 int errorno;
120 I32 laststype; 172 I32 laststype; /* U16 in 5.10.0 */
121 int laststatval; 173 int laststatval;
122 Stat_t statcache; 174 Stat_t statcache;
123}; 175};
124 176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
125static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
126static 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;
127static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
128static 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;
129 201
130static struct coro_cctx *cctx_first; 202static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 203static int cctx_count, cctx_idle;
132 204
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
133/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 215typedef struct coro_cctx
216{
135 struct coro_cctx *next; 217 struct coro_cctx *next;
136 218
137 /* the stack */ 219 /* the stack */
138 void *sptr; 220 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 221 size_t ssize;
140 222
141 /* cpu state */ 223 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
143 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
144 JMPENV *top_env; 226 JMPENV *top_env;
145 coro_context cctx; 227 coro_context cctx;
146 228
147 int inuse; 229 U32 gen;
148
149#if USE_VALGRIND 230#if CORO_USE_VALGRIND
150 int valgrind_id; 231 int valgrind_id;
151#endif 232#endif
233 unsigned char flags;
152} coro_cctx; 234} coro_cctx;
153 235
154enum { 236enum {
155 CF_RUNNING = 0x0001, /* coroutine is running */ 237 CF_RUNNING = 0x0001, /* coroutine is running */
156 CF_READY = 0x0002, /* coroutine is ready */ 238 CF_READY = 0x0002, /* coroutine is ready */
157 CF_NEW = 0x0004, /* ahs never been switched to */ 239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
158}; 241};
159 242
160/* this is a structure representing a perl-level coroutine */ 243/* the structure where most of the perl state is stored, overlaid on the cxstack */
161struct coro { 244typedef struct
162 /* the c coroutine allocated to this perl coroutine, if any */ 245{
163 coro_cctx *cctx; 246 SV *defsv;
164 247 AV *defav;
165 /* data associated with this coroutine (initial args) */ 248 SV *errsv;
166 AV *args; 249 SV *irsgv;
167 int refcnt;
168 int save; /* CORO_SAVE flags */
169 int flags; /* CF_ flags */
170
171 /* optionally saved, might be zero */
172 AV *defav; /* @_ */
173 SV *defsv; /* $_ */
174 SV *errsv; /* $@ */
175 SV *irssv; /* $/ */
176 SV *irssv_sv; /* real $/ cache */
177
178#define VAR(name,type) type name; 250#define VAR(name,type) type name;
179# include "state.h" 251# include "state.h"
180#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 */
181 274
182 /* coro process data */ 275 /* coro process data */
183 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;
184}; 284};
185 285
186typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
187typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
188 288
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
189static 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 *
190coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
191{ 341{
192 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
193 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
194 344
195 newpadlist = newAV (); 345 newpadlist = newAV ();
196 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
197#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
198 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
199#else 349#else
200 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
201#endif 351#endif
202 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
203 --AvFILLp (padlist); 353 --AvFILLp (padlist);
204 354
205 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
206 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
207 357
208 return newpadlist; 358 return newpadlist;
209} 359}
210 360
211static void 361static void
212free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
213{ 363{
214 /* may be during global destruction */ 364 /* may be during global destruction */
215 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
216 { 366 {
217 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
238 AV *padlist; 388 AV *padlist;
239 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
240 390
241 /* casting is fun. */ 391 /* casting is fun. */
242 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
243 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
244 394
245 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
246 396
247 return 0; 397 return 0;
248} 398}
249 399
250#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
251 402
252static 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};
253 407
254#define CORO_MAGIC(cv) \ 408#define CORO_MAGIC(sv, type) \
255 SvMAGIC (cv) \ 409 SvMAGIC (sv) \
256 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 410 ? SvMAGIC (sv)->mg_type == type \
257 ? SvMAGIC (cv) \ 411 ? SvMAGIC (sv) \
258 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 412 : mg_find (sv, type) \
259 : 0 413 : 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))
260 443
261/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
262static void 445static void
263get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
264{ 447{
265 MAGIC *mg = CORO_MAGIC (cv); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
266 AV *av; 449 AV *av;
267 450
268 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
269 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
270 else 453 else
271 { 454 {
272#if PREFER_PERL_FUNCTIONS 455#if CORO_PREFER_PERL_FUNCTIONS
273 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
274 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
275 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
276 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
277 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
278#else 462#else
279 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
280#endif 464#endif
281 } 465 }
282} 466}
283 467
284static void 468static void
285put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
286{ 470{
287 MAGIC *mg = CORO_MAGIC (cv); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
288 AV *av; 472 AV *av;
289 473
290 if (!mg) 474 if (expect_false (!mg))
291 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
292 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
293 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
294 mg->mg_virtual = &vtbl_coro;
295 mg->mg_obj = (SV *)newAV ();
296 }
297 476
298 av = (AV *)mg->mg_obj; 477 av = (AV *)mg->mg_obj;
299 478
300 if (AvFILLp (av) >= AvMAX (av)) 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
301 av_extend (av, AvMAX (av) + 1); 480 av_extend (av, AvMAX (av) + 1);
302 481
303 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
304} 483}
305 484
306#define SB do { 485/** load & save, init *******************************************************/
307#define SE } while (0)
308 486
309#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
310
311static void 487static void
312load_perl (Coro__State c) 488load_perl (pTHX_ Coro__State c)
313{ 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
314#define VAR(name,type) PL_ ## name = c->name; 500 #define VAR(name,type) PL_ ## name = slot->name;
315# include "state.h" 501 # include "state.h"
316#undef VAR 502 #undef VAR
317
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321 if (c->irssv)
322 {
323 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
324 SvREFCNT_dec (c->irssv);
325 else
326 {
327 REPLACE_SV (PL_rs, c->irssv);
328 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
329 sv_setsv (c->irssv_sv, PL_rs);
330 }
331 }
332 503
333 { 504 {
334 dSP; 505 dSP;
506
335 CV *cv; 507 CV *cv;
336 508
337 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
338 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
339 { 511 {
340 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
341 CvDEPTH (cv) = PTR2IV (POPs); 513 CvDEPTH (cv) = PTR2IV (POPs);
342 CvPADLIST (cv) = (AV *)POPs; 514 CvPADLIST (cv) = (AV *)POPs;
343 } 515 }
344 516
345 PUTBACK; 517 PUTBACK;
346 } 518 }
347}
348 519
520 slf_frame = c->slf_frame;
521}
522
349static void 523static void
350save_perl (Coro__State c) 524save_perl (pTHX_ Coro__State c)
351{ 525{
526 c->slf_frame = slf_frame;
527
352 { 528 {
353 dSP; 529 dSP;
354 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
355 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
356 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
358 /* 534 /*
359 * 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
360 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
361 */ 537 */
362 538
363 EXTEND (SP, 3 + 1);
364 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
365 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
366 for (;;) 541 for (;;)
367 { 542 {
368 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
369 { 544 {
370 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
371 546
372 if (CxTYPE (cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
373 { 548 {
374 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
375 550
376 if (CvDEPTH (cv)) 551 if (expect_true (CvDEPTH (cv)))
377 { 552 {
378 EXTEND (SP, 3); 553 EXTEND (SP, 3);
379 PUSHs ((SV *)CvPADLIST (cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
380 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
382 557
383 CvDEPTH (cv) = 0; 558 CvDEPTH (cv) = 0;
384 get_padlist (cv); 559 get_padlist (aTHX_ cv);
385 } 560 }
386 } 561 }
387 } 562 }
388 563
389 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
390 break; 565 break;
391 566
392 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
393 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
394 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
395 } 570 }
396 571
397 PUTBACK; 572 PUTBACK;
398 } 573 }
399 574
400 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
401 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
402 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
403 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 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 */
404 586
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
405#define VAR(name,type)c->name = PL_ ## name; 597 #define VAR(name,type) slot->name = PL_ ## name;
406# include "state.h" 598 # include "state.h"
407#undef VAR 599 #undef VAR
600 }
408} 601}
409 602
410/* 603/*
411 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
412 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
413 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
414 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
415 */ 608 */
416#if PREFER_PERL_FUNCTIONS 609#if CORO_PREFER_PERL_FUNCTIONS
417# define coro_init_stacks init_stacks 610# define coro_init_stacks init_stacks
418#else 611#else
419static void 612static void
420coro_init_stacks () 613coro_init_stacks (pTHX)
421{ 614{
422 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 615 PL_curstackinfo = new_stackinfo(32, 8);
423 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
424 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
425 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
426 619
427 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
428 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
429 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
430 623
431 New(50,PL_tmps_stack,128,SV*); 624 New(50,PL_tmps_stack,32,SV*);
432 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
433 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
434 PL_tmps_max = 128; 627 PL_tmps_max = 32;
435 628
436 New(54,PL_markstack,32,I32); 629 New(54,PL_markstack,16,I32);
437 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
438 PL_markstack_max = PL_markstack + 32; 631 PL_markstack_max = PL_markstack + 16;
439 632
440#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
441 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
442#endif 635#endif
443 636
444 New(54,PL_scopestack,32,I32); 637 New(54,PL_scopestack,8,I32);
445 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
446 PL_scopestack_max = 32; 639 PL_scopestack_max = 8;
447 640
448 New(54,PL_savestack,64,ANY); 641 New(54,PL_savestack,24,ANY);
449 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
450 PL_savestack_max = 64; 643 PL_savestack_max = 24;
451 644
452#if !PERL_VERSION_ATLEAST (5,9,0) 645#if !PERL_VERSION_ATLEAST (5,10,0)
453 New(54,PL_retstack,16,OP*); 646 New(54,PL_retstack,4,OP*);
454 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
455 PL_retstack_max = 16; 648 PL_retstack_max = 4;
456#endif 649#endif
457} 650}
458#endif 651#endif
459 652
460/* 653/*
461 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
462 */ 655 */
463static void 656static void
464coro_destroy_stacks () 657coro_destruct_stacks (pTHX)
465{ 658{
466 if (!IN_DESTRUCT)
467 {
468 /* restore all saved variables and stuff */
469 LEAVE_SCOPE (0);
470 assert (PL_tmps_floor == -1);
471
472 /* free all temporaries */
473 FREETMPS;
474 assert (PL_tmps_ix == -1);
475
476 POPSTACK_TO (PL_mainstack);
477 }
478
479 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
480 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
481 661
482 while (PL_curstackinfo) 662 while (PL_curstackinfo)
483 { 663 {
… …
493 673
494 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
495 Safefree (PL_markstack); 675 Safefree (PL_markstack);
496 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
497 Safefree (PL_savestack); 677 Safefree (PL_savestack);
498#if !PERL_VERSION_ATLEAST (5,9,0) 678#if !PERL_VERSION_ATLEAST (5,10,0)
499 Safefree (PL_retstack); 679 Safefree (PL_retstack);
500#endif 680#endif
501} 681}
502 682
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 */
503static void 745static int
504setup_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)
505{ 830{
506 /* 831 /*
507 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
508 */ 833 */
509
510 coro_init_stacks (); 834 coro_init_stacks (aTHX);
511 835
836 PL_runops = RUNOPS_DEFAULT;
512 PL_curcop = &PL_compiling; 837 PL_curcop = &PL_compiling;
513 PL_in_eval = EVAL_NULL; 838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
514 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
515 PL_localizing = 0; 842 PL_localizing = 0;
516 PL_dirty = 0; 843 PL_dirty = 0;
517 PL_restartop = 0; 844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
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);
518 859
519 { 860 {
520 dSP; 861 dSP;
521 LOGOP myop; 862 UNOP myop;
522 863
523 SvREFCNT_dec (GvAV (PL_defgv));
524 GvAV (PL_defgv) = coro->args; coro->args = 0;
525
526 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
527 myop.op_next = Nullop; 865 myop.op_next = Nullop;
528 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
529 867
530 PUSHMARK (SP); 868 PUSHMARK (SP);
531 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
532 PUTBACK; 870 PUTBACK;
533 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
534 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535 SPAGAIN; 873 SPAGAIN;
536 } 874 }
537 875
538 ENTER; /* necessary e.g. for dounwind */ 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 */
539} 881}
540 882
541static 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
542free_coro_mortal () 920free_coro_mortal (pTHX)
543{ 921{
544 if (coro_mortal) 922 if (expect_true (coro_mortal))
545 { 923 {
546 SvREFCNT_dec (coro_mortal); 924 SvREFCNT_dec (coro_mortal);
547 coro_mortal = 0; 925 coro_mortal = 0;
548 } 926 }
549} 927}
550 928
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
551/* inject a fake call to Coro::State::_cctx_init into the execution */ 1060/* inject a fake call to Coro::State::_cctx_init into the execution */
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 */
552static void NOINLINE 1064static void NOINLINE
553prepare_cctx (coro_cctx *cctx) 1065cctx_prepare (pTHX_ coro_cctx *cctx)
554{ 1066{
555 dSP; 1067 dSP;
556 LOGOP myop; 1068 UNOP myop;
557 1069
1070 PL_top_env = &PL_start_env;
1071
1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
1074
558 Zero (&myop, 1, LOGOP); 1075 Zero (&myop, 1, UNOP);
559 myop.op_next = PL_op; 1076 myop.op_next = PL_op;
560 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561 1078
562 PUSHMARK (SP); 1079 PUSHMARK (SP);
563 EXTEND (SP, 2); 1080 EXTEND (SP, 2);
564 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
565 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
566 PUTBACK; 1083 PUTBACK;
567 PL_op = (OP *)&myop; 1084 PL_op = (OP *)&myop;
568 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
569 SPAGAIN; 1086 SPAGAIN;
570} 1087}
571 1088
572static void 1089/* the tail of transfer: execute stuff we can only do after a transfer */
573coro_run (void *arg) 1090INLINE void
1091transfer_tail (pTHX)
574{ 1092{
575 /* coro_run is the alternative tail of transfer(), so unlock here. */ 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);
576 UNLOCK; 1098 UNLOCK;
577 1099
578 /* 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/*
579 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
580 */ 1112 */
581 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;
582 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
583 /* inject call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
584 prepare_cctx ((coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
585 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
586 /* 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 */
587 PL_restartop = PL_op; 1136 PL_restartop = PL_op;
588 perl_run (PL_curinterp); 1137 perl_run (PL_curinterp);
589 1138
590 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1139 /*
591 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 }
592} 1149}
593 1150
594static coro_cctx * 1151static coro_cctx *
595cctx_new () 1152cctx_new ()
596{ 1153{
597 coro_cctx *cctx; 1154 coro_cctx *cctx;
598 1155
599 ++cctx_count; 1156 ++cctx_count;
600
601 Newz (0, cctx, 1, coro_cctx); 1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
602 1185
603#if HAVE_MMAP 1186#if HAVE_MMAP
604
605 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
606 /* mmap supposedly does allocate-on-write for us */ 1188 /* mmap supposedly does allocate-on-write for us */
607 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);
608 1190
609 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;
610 { 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 {
611 perror ("FATAL: unable to mmap stack for coroutine"); 1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
612 _exit (EXIT_FAILURE); 1209 _exit (EXIT_FAILURE);
613 } 1210 }
614 1211
615# if STACKGUARD 1212 stack_start = cctx->sptr;
616 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1213 stack_size = cctx->ssize;
617# endif
618
619#else
620
621 cctx->ssize = STACKSIZE * (long)sizeof (long);
622 New (0, cctx->sptr, STACKSIZE, long);
623
624 if (!cctx->sptr)
625 { 1214 }
626 perror ("FATAL: unable to malloc stack for coroutine");
627 _exit (EXIT_FAILURE);
628 }
629 1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
630#endif 1218 #endif
631 1219
632#if USE_VALGRIND 1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
633 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
634 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
635 cctx->ssize + (char *)cctx->sptr
636 );
637#endif
638
639 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
640 1221
641 return cctx; 1222 return cctx;
642} 1223}
643 1224
644static void 1225static void
… …
646{ 1227{
647 if (!cctx) 1228 if (!cctx)
648 return; 1229 return;
649 1230
650 --cctx_count; 1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
651 1233
652#if USE_VALGRIND 1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
653 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
654#endif 1239 #endif
655 1240
656#if HAVE_MMAP 1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
657 munmap (cctx->sptr, cctx->ssize); 1243 munmap (cctx->sptr, cctx->ssize);
658#else 1244 else
1245#endif
659 Safefree (cctx->sptr); 1246 Safefree (cctx->sptr);
660#endif 1247 }
661 1248
662 Safefree (cctx); 1249 Safefree (cctx);
663} 1250}
664 1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
665static coro_cctx * 1255static coro_cctx *
666cctx_get () 1256cctx_get (pTHX)
667{ 1257{
668 coro_cctx *cctx; 1258 while (expect_true (cctx_first))
669
670 if (cctx_first)
671 { 1259 {
672 cctx = cctx_first; 1260 coro_cctx *cctx = cctx_first;
673 cctx_first = cctx->next; 1261 cctx_first = cctx->next;
674 --cctx_idle; 1262 --cctx_idle;
675 } 1263
676 else 1264 if (expect_true (!CCTX_EXPIRED (cctx)))
677 { 1265 return cctx;
678 cctx = cctx_new (); 1266
679 PL_op = PL_op->op_next; 1267 cctx_destroy (cctx);
680 } 1268 }
681 1269
682 return cctx; 1270 return cctx_new_run ();
683} 1271}
684 1272
685static void 1273static void
686cctx_put (coro_cctx *cctx) 1274cctx_put (coro_cctx *cctx)
687{ 1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
688 /* free another cctx if overlimit */ 1278 /* free another cctx if overlimit */
689 if (cctx_idle >= MAX_IDLE_CCTX) 1279 if (expect_false (cctx_idle >= cctx_max_idle))
690 { 1280 {
691 coro_cctx *first = cctx_first; 1281 coro_cctx *first = cctx_first;
692 cctx_first = first->next; 1282 cctx_first = first->next;
693 --cctx_idle; 1283 --cctx_idle;
694 1284
695 assert (!first->inuse);
696 cctx_destroy (first); 1285 cctx_destroy (first);
697 } 1286 }
698 1287
699 ++cctx_idle; 1288 ++cctx_idle;
700 cctx->next = cctx_first; 1289 cctx->next = cctx_first;
701 cctx_first = cctx; 1290 cctx_first = cctx;
702} 1291}
703 1292
704/* 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 */
705static void NOINLINE 1317static void NOINLINE
706transfer (struct coro *prev, struct coro *next) 1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
707{ 1319{
708 dSTACKLEVEL; 1320 dSTACKLEVEL;
709 1321
710 /* sometimes transfer is only called to set idle_sp */ 1322 /* sometimes transfer is only called to set idle_sp */
711 if (!next) 1323 if (expect_false (!next))
712 { 1324 {
713 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
714 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
715 } 1327 }
716 else if (prev != next) 1328 else if (expect_true (prev != next))
717 { 1329 {
718 coro_cctx *prev__cctx; 1330 coro_cctx *prev__cctx;
719 1331
720 if (prev->flags & CF_NEW) 1332 if (expect_false (prev->flags & CF_NEW))
721 { 1333 {
722 /* create a new empty context */ 1334 /* create a new empty/source context */
723 Newz (0, prev->cctx, 1, coro_cctx); 1335 prev->cctx = cctx_new_empty ();
724 prev->cctx->inuse = 1;
725 prev->flags &= ~CF_NEW; 1336 prev->flags &= ~CF_NEW;
726 prev->flags |= CF_RUNNING; 1337 prev->flags |= CF_RUNNING;
727 } 1338 }
728 1339
729 /*TODO: must not croak here */
730 if (!prev->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
732
733 if (next->flags & CF_RUNNING)
734 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
735
736 prev->flags &= ~CF_RUNNING; 1340 prev->flags &= ~CF_RUNNING;
737 next->flags |= CF_RUNNING; 1341 next->flags |= CF_RUNNING;
738 1342
739 LOCK; 1343 LOCK;
740 1344
1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
741 if (next->flags & CF_NEW) 1348 if (expect_false (next->flags & CF_NEW))
742 { 1349 {
743 /* need to start coroutine */ 1350 /* need to start coroutine */
744 next->flags &= ~CF_NEW; 1351 next->flags &= ~CF_NEW;
745 /* first get rid of the old state */
746 save_perl (prev);
747 /* setup coroutine call */ 1352 /* setup coroutine call */
748 setup_coro (next); 1353 coro_setup (aTHX_ next);
749 /* need a new stack */
750 assert (!next->cctx);
751 } 1354 }
752 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 ))
753 { 1366 {
754 /* coroutine already started */ 1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
755 save_perl (prev); 1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
756 load_perl (next); 1369
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);
757 } 1379 }
758 1380
759 prev__cctx = prev->cctx; 1381 ++next->usecount;
760 1382
761 /* possibly "free" the cctx */
762 if (prev__cctx->idle_sp == STACKLEVEL)
763 {
764 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
765 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
766
767 prev->cctx = 0;
768
769 cctx_put (prev__cctx);
770 prev__cctx->inuse = 0;
771 }
772
773 if (!next->cctx) 1383 if (expect_true (!next->cctx))
774 {
775 next->cctx = cctx_get (); 1384 next->cctx = cctx_get (aTHX);
776 assert (!next->cctx->inuse);
777 next->cctx->inuse = 1;
778 }
779 1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1388
780 if (prev__cctx != next->cctx) 1389 if (expect_false (prev__cctx != next->cctx))
781 { 1390 {
782 prev__cctx->top_env = PL_top_env; 1391 prev__cctx->top_env = PL_top_env;
783 PL_top_env = next->cctx->top_env; 1392 PL_top_env = next->cctx->top_env;
784 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
785 } 1394 }
786 1395
787 free_coro_mortal (); 1396 transfer_tail (aTHX);
1397 }
1398}
788 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;
789 UNLOCK; 1419 UNLOCK;
790 } 1420 }
791} 1421 else
792 1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
793struct transfer_args
794{
795 struct coro *prev, *next;
796};
797
798#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
799
800static void
801coro_state_destroy (struct coro *coro)
802{
803 if (coro->refcnt--)
804 return;
805 1423
806 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
807 { 1425 {
808 struct coro temp; 1426 struct coro temp;
809 Zero (&temp, 1, struct coro);
810 temp.save = CORO_SAVE_ALL;
811 1427
812 if (coro->flags & CF_RUNNING) 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
813 croak ("FATAL: tried to destroy currently running coroutine");
814 1429
815 save_perl (&temp); 1430 save_perl (aTHX_ &temp);
816 load_perl (coro); 1431 load_perl (aTHX_ coro);
817 1432
818 coro_destroy_stacks (); 1433 coro_destruct (aTHX_ coro);
819 1434
820 load_perl (&temp); /* this will get rid of defsv etc.. */ 1435 load_perl (aTHX_ &temp);
821 1436
822 coro->mainstack = 0; 1437 coro->slot = 0;
823 } 1438 }
824 1439
825 cctx_destroy (coro->cctx); 1440 cctx_destroy (coro->cctx);
826 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
827 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;
828} 1448}
829 1449
830static int 1450static int
831coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
832{ 1452{
833 struct coro *coro = (struct coro *)mg->mg_ptr; 1453 struct coro *coro = (struct coro *)mg->mg_ptr;
834 mg->mg_ptr = 0; 1454 mg->mg_ptr = 0;
835 1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
836 coro_state_destroy (coro); 1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
837 1463
838 return 0; 1464 return 0;
839} 1465}
840 1466
841static int 1467static int
… …
848 return 0; 1474 return 0;
849} 1475}
850 1476
851static MGVTBL coro_state_vtbl = { 1477static MGVTBL coro_state_vtbl = {
852 0, 0, 0, 0, 1478 0, 0, 0, 0,
853 coro_state_clear, 1479 coro_state_free,
854 0, 1480 0,
855#ifdef MGf_DUP 1481#ifdef MGf_DUP
856 coro_state_dup, 1482 coro_state_dup,
857#else 1483#else
858# define MGf_DUP 0 1484# define MGf_DUP 0
859#endif 1485#endif
860}; 1486};
861 1487
862static struct coro *
863SvSTATE (SV *coro)
864{
865 HV *stash;
866 MAGIC *mg;
867
868 if (SvROK (coro))
869 coro = SvRV (coro);
870
871 stash = SvSTASH (coro);
872 if (stash != coro_stash && stash != coro_state_stash)
873 {
874 /* very slow, but rare, check */
875 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
876 croak ("Coro::State object required");
877 }
878
879 mg = SvMAGIC (coro);
880 assert (mg->mg_type == PERL_MAGIC_ext);
881 return (struct coro *)mg->mg_ptr;
882}
883
884static void 1488static void
885prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
886{ 1490{
887 ta->prev = SvSTATE (prev_sv); 1491 ta->prev = SvSTATE (prev_sv);
888 ta->next = SvSTATE (next_sv); 1492 ta->next = SvSTATE (next_sv);
1493 TRANSFER_CHECK (*ta);
889} 1494}
890 1495
891static void 1496static void
892api_transfer (SV *prev_sv, SV *next_sv) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
893{ 1498{
894 struct transfer_args ta; 1499 struct coro_transfer_args ta;
895 1500
896 prepare_transfer (&ta, prev_sv, next_sv); 1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
897 TRANSFER (ta); 1502 TRANSFER (ta, 1);
1503}
1504
1505/** Coro ********************************************************************/
1506
1507static void
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)
1515{
1516 int prio;
1517
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
1521
1522 return 0;
898} 1523}
899 1524
900static int 1525static int
901api_save (SV *coro_sv, int new_save)
902{
903 struct coro *coro = SvSTATE (coro_sv);
904 int old_save = coro->save;
905
906 if (new_save >= 0)
907 coro->save = new_save;
908
909 return old_save;
910}
911
912/** Coro ********************************************************************/
913
914#define PRIO_MAX 3
915#define PRIO_HIGH 1
916#define PRIO_NORMAL 0
917#define PRIO_LOW -1
918#define PRIO_IDLE -3
919#define PRIO_MIN -4
920
921/* for Coro.pm */
922static SV *coro_current;
923static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
924static int coro_nready;
925
926static void
927coro_enq (SV *coro_sv)
928{
929 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
930 coro_nready++;
931}
932
933static SV *
934coro_deq (int min_prio)
935{
936 int prio = PRIO_MAX - PRIO_MIN;
937
938 min_prio -= PRIO_MIN;
939 if (min_prio < 0)
940 min_prio = 0;
941
942 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
943 if (AvFILLp (coro_ready [prio]) >= 0)
944 {
945 coro_nready--;
946 return av_shift (coro_ready [prio]);
947 }
948
949 return 0;
950}
951
952static int
953api_ready (SV *coro_sv) 1526api_ready (pTHX_ SV *coro_sv)
954{ 1527{
955 struct coro *coro; 1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
956 1531
957 if (SvROK (coro_sv)) 1532 if (SvROK (coro_sv))
958 coro_sv = SvRV (coro_sv); 1533 coro_sv = SvRV (coro_sv);
959 1534
960 coro = SvSTATE (coro_sv); 1535 coro = SvSTATE (coro_sv);
… …
963 return 0; 1538 return 0;
964 1539
965 coro->flags |= CF_READY; 1540 coro->flags |= CF_READY;
966 1541
967 LOCK; 1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
968 coro_enq (SvREFCNT_inc (coro_sv)); 1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1548 ++coro_nready;
1549
969 UNLOCK; 1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
970 1570
971 return 1; 1571 return 1;
972} 1572}
973 1573
974static int 1574static int
975api_is_ready (SV *coro_sv) 1575api_is_ready (pTHX_ SV *coro_sv)
976{ 1576{
977 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
978} 1578}
979 1579
980static void 1580INLINE void
981prepare_schedule (struct transfer_args *ta) 1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
982{ 1582{
983 SV *prev, *next; 1583 SV *prev_sv, *next_sv;
984 1584
985 for (;;) 1585 for (;;)
986 { 1586 {
987 LOCK; 1587 LOCK;
988 next = coro_deq (PRIO_MIN); 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;
989 UNLOCK; 1621 UNLOCK;
990
991 if (next)
992 break; 1622 break;
993
994 {
995 dSP;
996
997 ENTER;
998 SAVETMPS;
999
1000 PUSHMARK (SP);
1001 PUTBACK;
1002 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1003
1004 FREETMPS;
1005 LEAVE;
1006 } 1623 }
1007 }
1008
1009 prev = SvRV (coro_current);
1010 SvRV_set (coro_current, next);
1011 1624
1012 /* free this only after the transfer */ 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
1013 LOCK; 1633 LOCK;
1014 free_coro_mortal (); 1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1015 UNLOCK; 1636 UNLOCK;
1016 coro_mortal = prev;
1017
1018 assert (!SvROK(prev));//D
1019 assert (!SvROK(next));//D
1020
1021 ta->prev = SvSTATE (prev);
1022 ta->next = SvSTATE (next);
1023
1024 assert (ta->next->flags & CF_READY);
1025 ta->next->flags &= ~CF_READY;
1026} 1637}
1027 1638
1028static void 1639INLINE void
1029prepare_cede (struct transfer_args *ta) 1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1030{ 1641{
1031 api_ready (coro_current); 1642 api_ready (aTHX_ coro_current);
1032 prepare_schedule (ta); 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);
1033} 1667}
1034 1668
1035static int 1669static int
1036prepare_cede_notself (struct transfer_args *ta) 1670api_cede (pTHX)
1037{ 1671{
1038 if (coro_nready) 1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1039 { 1677 {
1040 SV *prev = SvRV (coro_current); 1678 TRANSFER (ta, 1);
1041 prepare_schedule (ta);
1042 api_ready (prev);
1043 return 1; 1679 return 1;
1044 } 1680 }
1045 else 1681 else
1046 return 0; 1682 return 0;
1047} 1683}
1048 1684
1049static void
1050api_schedule (void)
1051{
1052 struct transfer_args ta;
1053
1054 prepare_schedule (&ta);
1055 TRANSFER (ta);
1056}
1057
1058static int 1685static int
1059api_cede (void) 1686api_cede_notself (pTHX)
1060{ 1687{
1688 if (coro_nready)
1689 {
1061 struct transfer_args ta; 1690 struct coro_transfer_args ta;
1062 1691
1063 prepare_cede (&ta); 1692 prepare_cede_notself (aTHX_ &ta);
1064
1065 if (ta.prev != ta.next)
1066 {
1067 TRANSFER (ta); 1693 TRANSFER (ta, 1);
1068 return 1; 1694 return 1;
1069 } 1695 }
1070 else 1696 else
1071 return 0; 1697 return 0;
1072} 1698}
1073 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/*****************************************************************************/
1726/* PerlIO::cede */
1727
1728typedef struct
1729{
1730 PerlIOBuf base;
1731 NV next, every;
1732} PerlIOCede;
1733
1734static IV
1735PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1736{
1737 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1738
1739 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1740 self->next = nvtime () + self->every;
1741
1742 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1743}
1744
1745static SV *
1746PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1747{
1748 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1749
1750 return newSVnv (self->every);
1751}
1752
1753static IV
1754PerlIOCede_flush (pTHX_ PerlIO *f)
1755{
1756 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757 double now = nvtime ();
1758
1759 if (now >= self->next)
1760 {
1761 api_cede (aTHX);
1762 self->next = now + self->every;
1763 }
1764
1765 return PerlIOBuf_flush (aTHX_ f);
1766}
1767
1768static PerlIO_funcs PerlIO_cede =
1769{
1770 sizeof(PerlIO_funcs),
1771 "cede",
1772 sizeof(PerlIOCede),
1773 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1774 PerlIOCede_pushed,
1775 PerlIOBuf_popped,
1776 PerlIOBuf_open,
1777 PerlIOBase_binmode,
1778 PerlIOCede_getarg,
1779 PerlIOBase_fileno,
1780 PerlIOBuf_dup,
1781 PerlIOBuf_read,
1782 PerlIOBuf_unread,
1783 PerlIOBuf_write,
1784 PerlIOBuf_seek,
1785 PerlIOBuf_tell,
1786 PerlIOBuf_close,
1787 PerlIOCede_flush,
1788 PerlIOBuf_fill,
1789 PerlIOBase_eof,
1790 PerlIOBase_error,
1791 PerlIOBase_clearerr,
1792 PerlIOBase_setlinebuf,
1793 PerlIOBuf_get_base,
1794 PerlIOBuf_bufsiz,
1795 PerlIOBuf_get_ptr,
1796 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt,
1798};
1799
1800/*****************************************************************************/
1801
1802static const CV *slf_cv; /* for quick consistency check */
1803
1804static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1805static SV *slf_arg0;
1806static SV *slf_arg1;
1807static SV *slf_arg2;
1808
1809/* this restores the stack in the case we patched the entersub, to */
1810/* recreate the stack frame as perl will on following calls */
1811/* since entersub cleared the stack */
1812static OP *
1813pp_restore (pTHX)
1814{
1815 dSP;
1816
1817 PUSHMARK (SP);
1818
1819 EXTEND (SP, 3);
1820 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1821 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1822 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1823 PUSHs ((SV *)CvGV (slf_cv));
1824
1825 RETURNOP (slf_restore.op_first);
1826}
1827
1828static void
1829slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1830{
1831 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1832}
1833
1834static void
1835slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1836{
1837 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1838
1839 frame->prepare = slf_prepare_set_stacklevel;
1840 frame->check = slf_check_nop;
1841 frame->data = (void *)SvIV (arg [0]);
1842}
1843
1844static void
1845slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1846{
1847 SV **arg = (SV **)slf_frame.data;
1848
1849 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1850}
1851
1852static void
1853slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1854{
1855 if (items != 2)
1856 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1857
1858 frame->prepare = slf_prepare_transfer;
1859 frame->check = slf_check_nop;
1860 frame->data = (void *)arg; /* let's hope it will stay valid */
1861}
1862
1863static void
1864slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1865{
1866 frame->prepare = prepare_schedule;
1867 frame->check = slf_check_nop;
1868}
1869
1870static void
1871slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1872{
1873 frame->prepare = prepare_cede;
1874 frame->check = slf_check_nop;
1875}
1876
1877static void
1878slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1879{
1880 frame->prepare = prepare_cede_notself;
1881 frame->check = slf_check_nop;
1882}
1883
1884/* we hijack an hopefully unused CV flag for our purposes */
1885#define CVf_SLF 0x4000
1886
1887/*
1888 * these not obviously related functions are all rolled into one
1889 * function to increase chances that they all will call transfer with the same
1890 * stack offset
1891 * SLF stands for "schedule-like-function".
1892 */
1893static OP *
1894pp_slf (pTHX)
1895{
1896 I32 checkmark; /* mark SP to see how many elements check has pushed */
1897
1898 /* set up the slf frame, unless it has already been set-up */
1899 /* the latter happens when a new coro has been started */
1900 /* or when a new cctx was attached to an existing coroutine */
1901 if (expect_true (!slf_frame.prepare))
1902 {
1903 /* first iteration */
1904 dSP;
1905 SV **arg = PL_stack_base + TOPMARK + 1;
1906 int items = SP - arg; /* args without function object */
1907 SV *gv = *sp;
1908
1909 /* do a quick consistency check on the "function" object, and if it isn't */
1910 /* for us, divert to the real entersub */
1911 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1912 return PL_ppaddr[OP_ENTERSUB](aTHX);
1913
1914 /* pop args */
1915 SP = PL_stack_base + POPMARK;
1916
1917 if (!(PL_op->op_flags & OPf_STACKED))
1918 {
1919 /* ampersand-form of call, use @_ instead of stack */
1920 AV *av = GvAV (PL_defgv);
1921 arg = AvARRAY (av);
1922 items = AvFILLp (av) + 1;
1923 }
1924
1925 PUTBACK;
1926
1927 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, GvCV (gv), arg, items);
1928 }
1929
1930 /* now interpret the slf_frame */
1931 /* we use a callback system not to make the code needlessly */
1932 /* complicated, but so we can run multiple perl coros from one cctx */
1933
1934 do
1935 {
1936 struct coro_transfer_args ta;
1937
1938 slf_frame.prepare (aTHX_ &ta);
1939 TRANSFER (ta, 0);
1940
1941 checkmark = PL_stack_sp - PL_stack_base;
1942 }
1943 while (slf_frame.check (aTHX_ &slf_frame));
1944
1945 {
1946 dSP;
1947 SV **bot = PL_stack_base + checkmark;
1948 int gimme = GIMME_V;
1949
1950 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1951
1952 /* make sure we put something on the stack in scalar context */
1953 if (gimme == G_SCALAR)
1954 {
1955 if (sp == bot)
1956 XPUSHs (&PL_sv_undef);
1957
1958 SP = bot + 1;
1959 }
1960
1961 PUTBACK;
1962 }
1963
1964 return NORMAL;
1965}
1966
1967static void
1968api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1969{
1970 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1971
1972 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1973 && PL_op->op_ppaddr != pp_slf)
1974 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1975
1976 if (items > 3)
1977 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1978
1979 CvFLAGS (cv) |= CVf_SLF;
1980 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981 slf_cv = cv;
1982
1983 /* we patch the op, and then re-run the whole call */
1984 /* we have to put the same argument on the stack for this to work */
1985 /* and this will be done by pp_restore */
1986 slf_restore.op_next = (OP *)&slf_restore;
1987 slf_restore.op_type = OP_NULL;
1988 slf_restore.op_ppaddr = pp_restore;
1989 slf_restore.op_first = PL_op;
1990
1991 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1992 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1993 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1994
1995 PL_op->op_ppaddr = pp_slf;
1996
1997 PL_op = (OP *)&slf_restore;
1998}
1999
2000/*****************************************************************************/
2001
1074static int 2002static int
1075api_cede_notself (void) 2003slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1076{ 2004{
1077 struct transfer_args ta; 2005 AV *av = (AV *)frame->data;
2006 SV *count_sv = AvARRAY (av)[0];
1078 2007
1079 if (prepare_cede_notself (&ta)) 2008 if (SvIVX (count_sv) > 0)
2009 {
2010 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2011 return 0;
1080 { 2012 }
1081 TRANSFER (ta); 2013 else
2014 {
2015 int i;
2016 /* if we were woken up but can't down, we look through the whole */
2017 /* waiters list and only add us if we aren't in there already */
2018 /* this avoids some degenerate memory usage cases */
2019
2020 for (i = 1; i <= AvFILLp (av); ++i)
2021 if (AvARRAY (av)[i] == SvRV (coro_current))
2022 return 1;
2023
2024 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1082 return 1; 2025 return 1;
1083 } 2026 }
2027}
2028
2029static void
2030slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2031{
2032 AV *av = (AV *)SvRV (arg [0]);
2033
2034 if (SvIVX (AvARRAY (av)[0]) > 0)
2035 {
2036 frame->data = (void *)av;
2037 frame->prepare = prepare_nop;
2038 }
1084 else 2039 else
1085 return 0; 2040 {
1086} 2041 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1087 2042
2043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2044 frame->prepare = prepare_schedule;
2045 }
2046
2047 frame->check = slf_check_semaphore_down;
2048
2049}
2050
2051/*****************************************************************************/
2052
2053#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2054
2055/* create a closure from XS, returns a code reference */
2056/* the arg can be accessed via GENSUB_ARG from the callback */
2057/* the callback must use dXSARGS/XSRETURN */
2058static SV *
2059gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2060{
2061 CV *cv = (CV *)NEWSV (0, 0);
2062
2063 sv_upgrade ((SV *)cv, SVt_PVCV);
2064
2065 CvANON_on (cv);
2066 CvISXSUB_on (cv);
2067 CvXSUB (cv) = xsub;
2068 GENSUB_ARG = arg;
2069
2070 return newRV_noinc ((SV *)cv);
2071}
2072
2073/*****************************************************************************/
2074
1088MODULE = Coro::State PACKAGE = Coro::State 2075MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1089 2076
1090PROTOTYPES: DISABLE 2077PROTOTYPES: DISABLE
1091 2078
1092BOOT: 2079BOOT:
1093{ 2080{
1094#ifdef USE_ITHREADS 2081#ifdef USE_ITHREADS
1095 MUTEX_INIT (&coro_mutex); 2082 MUTEX_INIT (&coro_lock);
2083# if CORO_PTHREAD
2084 coro_thx = PERL_GET_CONTEXT;
2085# endif
1096#endif 2086#endif
1097 BOOT_PAGESIZE; 2087 BOOT_PAGESIZE;
1098 2088
2089 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2090 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2091
2092 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2093 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2094 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2095
2096 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2097 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2098 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2099
1099 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2100 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1100 2101
2102 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2103 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1101 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2104 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1102 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1103 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1104 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1105 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2105 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1106 2106
1107 main_mainstack = PL_mainstack; 2107 main_mainstack = PL_mainstack;
2108 main_top_env = PL_top_env;
1108 2109
2110 while (main_top_env->je_prev)
2111 main_top_env = main_top_env->je_prev;
2112
1109 coroapi.ver = CORO_API_VERSION; 2113 coroapi.ver = CORO_API_VERSION;
2114 coroapi.rev = CORO_API_REVISION;
2115
1110 coroapi.transfer = api_transfer; 2116 coroapi.transfer = api_transfer;
2117
2118 coroapi.sv_state = SvSTATE_;
2119 coroapi.execute_slf = api_execute_slf;
2120 coroapi.prepare_nop = prepare_nop;
2121 coroapi.prepare_schedule = prepare_schedule;
2122 coroapi.prepare_cede = prepare_cede;
2123 coroapi.prepare_cede_notself = prepare_cede_notself;
2124
2125 {
2126 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2127
2128 if (!svp) croak ("Time::HiRes is required");
2129 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2130
2131 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2132 }
1111 2133
1112 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2134 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1113} 2135}
1114 2136
1115SV * 2137SV *
1116new (char *klass, ...) 2138new (char *klass, ...)
1117 CODE: 2139 CODE:
1118{ 2140{
1119 struct coro *coro; 2141 struct coro *coro;
2142 MAGIC *mg;
1120 HV *hv; 2143 HV *hv;
1121 int i; 2144 int i;
1122 2145
1123 Newz (0, coro, 1, struct coro); 2146 Newz (0, coro, 1, struct coro);
1124 coro->args = newAV (); 2147 coro->args = newAV ();
1125 coro->save = CORO_SAVE_ALL;
1126 coro->flags = CF_NEW; 2148 coro->flags = CF_NEW;
1127 2149
2150 if (coro_first) coro_first->prev = coro;
2151 coro->next = coro_first;
2152 coro_first = coro;
2153
1128 hv = newHV (); 2154 coro->hv = hv = newHV ();
1129 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2155 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2156 mg->mg_flags |= MGf_DUP;
1130 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2157 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1131 2158
2159 av_extend (coro->args, items - 1);
1132 for (i = 1; i < items; i++) 2160 for (i = 1; i < items; i++)
1133 av_push (coro->args, newSVsv (ST (i))); 2161 av_push (coro->args, newSVsv (ST (i)));
1134} 2162}
1135 OUTPUT: 2163 OUTPUT:
1136 RETVAL 2164 RETVAL
1137 2165
1138int 2166void
1139save (SV *coro, int new_save = -1) 2167_set_stacklevel (...)
1140 CODE: 2168 CODE:
1141 RETVAL = api_save (coro, new_save); 2169 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2170
2171void
2172transfer (...)
2173 PROTOTYPE: $$
2174 CODE:
2175 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2176
2177bool
2178_destroy (SV *coro_sv)
2179 CODE:
2180 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142 OUTPUT: 2181 OUTPUT:
1143 RETVAL 2182 RETVAL
1144 2183
1145void 2184void
1146_set_stacklevel (...)
1147 ALIAS:
1148 Coro::State::transfer = 1
1149 Coro::schedule = 2
1150 Coro::cede = 3
1151 Coro::cede_notself = 4
1152 CODE:
1153{
1154 struct transfer_args ta;
1155
1156 switch (ix)
1157 {
1158 case 0:
1159 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1160 ta.next = 0;
1161 break;
1162
1163 case 1:
1164 if (items != 2)
1165 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1166
1167 prepare_transfer (&ta, ST (0), ST (1));
1168 break;
1169
1170 case 2:
1171 prepare_schedule (&ta);
1172 break;
1173
1174 case 3:
1175 prepare_cede (&ta);
1176 break;
1177
1178 case 4:
1179 if (!prepare_cede_notself (&ta))
1180 XSRETURN_EMPTY;
1181
1182 break;
1183 }
1184
1185 BARRIER;
1186 TRANSFER (ta);
1187}
1188
1189void
1190_clone_state_from (SV *dst, SV *src)
1191 CODE:
1192{
1193 struct coro *coro_src = SvSTATE (src);
1194
1195 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1196
1197 ++coro_src->refcnt;
1198 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1199}
1200
1201void
1202_exit (code) 2185_exit (int code)
1203 int code
1204 PROTOTYPE: $ 2186 PROTOTYPE: $
1205 CODE: 2187 CODE:
1206 _exit (code); 2188 _exit (code);
1207 2189
1208int 2190int
2191cctx_stacksize (int new_stacksize = 0)
2192 PROTOTYPE: ;$
2193 CODE:
2194 RETVAL = cctx_stacksize;
2195 if (new_stacksize)
2196 {
2197 cctx_stacksize = new_stacksize;
2198 ++cctx_gen;
2199 }
2200 OUTPUT:
2201 RETVAL
2202
2203int
2204cctx_max_idle (int max_idle = 0)
2205 PROTOTYPE: ;$
2206 CODE:
2207 RETVAL = cctx_max_idle;
2208 if (max_idle > 1)
2209 cctx_max_idle = max_idle;
2210 OUTPUT:
2211 RETVAL
2212
2213int
1209cctx_count () 2214cctx_count ()
2215 PROTOTYPE:
1210 CODE: 2216 CODE:
1211 RETVAL = cctx_count; 2217 RETVAL = cctx_count;
1212 OUTPUT: 2218 OUTPUT:
1213 RETVAL 2219 RETVAL
1214 2220
1215int 2221int
1216cctx_idle () 2222cctx_idle ()
2223 PROTOTYPE:
1217 CODE: 2224 CODE:
1218 RETVAL = cctx_idle; 2225 RETVAL = cctx_idle;
1219 OUTPUT: 2226 OUTPUT:
1220 RETVAL 2227 RETVAL
1221 2228
2229void
2230list ()
2231 PROTOTYPE:
2232 PPCODE:
2233{
2234 struct coro *coro;
2235 for (coro = coro_first; coro; coro = coro->next)
2236 if (coro->hv)
2237 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2238}
2239
2240void
2241call (Coro::State coro, SV *coderef)
2242 ALIAS:
2243 eval = 1
2244 CODE:
2245{
2246 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2247 {
2248 struct coro temp;
2249
2250 if (!(coro->flags & CF_RUNNING))
2251 {
2252 PUTBACK;
2253 save_perl (aTHX_ &temp);
2254 load_perl (aTHX_ coro);
2255 }
2256
2257 {
2258 dSP;
2259 ENTER;
2260 SAVETMPS;
2261 PUTBACK;
2262 PUSHSTACK;
2263 PUSHMARK (SP);
2264
2265 if (ix)
2266 eval_sv (coderef, 0);
2267 else
2268 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2269
2270 POPSTACK;
2271 SPAGAIN;
2272 FREETMPS;
2273 LEAVE;
2274 PUTBACK;
2275 }
2276
2277 if (!(coro->flags & CF_RUNNING))
2278 {
2279 save_perl (aTHX_ coro);
2280 load_perl (aTHX_ &temp);
2281 SPAGAIN;
2282 }
2283 }
2284}
2285
2286SV *
2287is_ready (Coro::State coro)
2288 PROTOTYPE: $
2289 ALIAS:
2290 is_ready = CF_READY
2291 is_running = CF_RUNNING
2292 is_new = CF_NEW
2293 is_destroyed = CF_DESTROYED
2294 CODE:
2295 RETVAL = boolSV (coro->flags & ix);
2296 OUTPUT:
2297 RETVAL
2298
2299void
2300throw (Coro::State self, SV *throw = &PL_sv_undef)
2301 PROTOTYPE: $;$
2302 CODE:
2303 SvREFCNT_dec (self->throw);
2304 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2305
2306void
2307api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2308 PROTOTYPE: $;$
2309 C_ARGS: aTHX_ coro, flags
2310
2311SV *
2312has_cctx (Coro::State coro)
2313 PROTOTYPE: $
2314 CODE:
2315 RETVAL = boolSV (!!coro->cctx);
2316 OUTPUT:
2317 RETVAL
2318
2319int
2320is_traced (Coro::State coro)
2321 PROTOTYPE: $
2322 CODE:
2323 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2324 OUTPUT:
2325 RETVAL
2326
2327UV
2328rss (Coro::State coro)
2329 PROTOTYPE: $
2330 ALIAS:
2331 usecount = 1
2332 CODE:
2333 switch (ix)
2334 {
2335 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2336 case 1: RETVAL = coro->usecount; break;
2337 }
2338 OUTPUT:
2339 RETVAL
2340
2341void
2342force_cctx ()
2343 PROTOTYPE:
2344 CODE:
2345 struct coro *coro = SvSTATE (coro_current);
2346 coro->cctx->idle_sp = 0;
2347
2348void
2349swap_defsv (Coro::State self)
2350 PROTOTYPE: $
2351 ALIAS:
2352 swap_defav = 1
2353 CODE:
2354 if (!self->slot)
2355 croak ("cannot swap state with coroutine that has no saved state,");
2356 else
2357 {
2358 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2359 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2360
2361 SV *tmp = *src; *src = *dst; *dst = tmp;
2362 }
2363
1222MODULE = Coro::State PACKAGE = Coro 2364MODULE = Coro::State PACKAGE = Coro
1223 2365
1224BOOT: 2366BOOT:
1225{ 2367{
1226 int i; 2368 int i;
1227 2369
2370 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2371 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2372 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2373
2374 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2375 SvREADONLY_on (coro_current);
2376
1228 coro_stash = gv_stashpv ("Coro", TRUE); 2377 coro_stash = gv_stashpv ("Coro", TRUE);
1229 2378
1230 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2379 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1231 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2380 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1232 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2381 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1233 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2382 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1234 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2383 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1235 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2384 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1236 2385
1237 coro_current = get_sv ("Coro::current", FALSE);
1238 SvREADONLY_on (coro_current);
1239
1240 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2386 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1241 coro_ready[i] = newAV (); 2387 coro_ready[i] = newAV ();
1242 2388
1243 { 2389 {
1244 SV *sv = perl_get_sv("Coro::API", 1); 2390 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1245 2391
1246 coroapi.schedule = api_schedule; 2392 coroapi.schedule = api_schedule;
1247 coroapi.save = api_save;
1248 coroapi.cede = api_cede; 2393 coroapi.cede = api_cede;
1249 coroapi.cede_notself = api_cede_notself; 2394 coroapi.cede_notself = api_cede_notself;
1250 coroapi.ready = api_ready; 2395 coroapi.ready = api_ready;
1251 coroapi.is_ready = api_is_ready; 2396 coroapi.is_ready = api_is_ready;
1252 coroapi.nready = &coro_nready; 2397 coroapi.nready = coro_nready;
1253 coroapi.current = coro_current; 2398 coroapi.current = coro_current;
1254 2399
1255 GCoroAPI = &coroapi; 2400 GCoroAPI = &coroapi;
1256 sv_setiv (sv, (IV)&coroapi); 2401 sv_setiv (sv, (IV)&coroapi);
1257 SvREADONLY_on (sv); 2402 SvREADONLY_on (sv);
1258 } 2403 }
1259} 2404}
2405
2406void
2407schedule (...)
2408 CODE:
2409 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2410
2411void
2412cede (...)
2413 CODE:
2414 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2415
2416void
2417cede_notself (...)
2418 CODE:
2419 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1260 2420
1261void 2421void
1262_set_current (SV *current) 2422_set_current (SV *current)
1263 PROTOTYPE: $ 2423 PROTOTYPE: $
1264 CODE: 2424 CODE:
1265 SvREFCNT_dec (SvRV (coro_current)); 2425 SvREFCNT_dec (SvRV (coro_current));
1266 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2426 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2427
2428void
2429_set_readyhook (SV *hook)
2430 PROTOTYPE: $
2431 CODE:
2432 LOCK;
2433 SvREFCNT_dec (coro_readyhook);
2434 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2435 UNLOCK;
1267 2436
1268int 2437int
1269prio (Coro::State coro, int newprio = 0) 2438prio (Coro::State coro, int newprio = 0)
2439 PROTOTYPE: $;$
1270 ALIAS: 2440 ALIAS:
1271 nice = 1 2441 nice = 1
1272 CODE: 2442 CODE:
1273{ 2443{
1274 RETVAL = coro->prio; 2444 RETVAL = coro->prio;
… …
1289 2459
1290SV * 2460SV *
1291ready (SV *self) 2461ready (SV *self)
1292 PROTOTYPE: $ 2462 PROTOTYPE: $
1293 CODE: 2463 CODE:
1294 RETVAL = boolSV (api_ready (self)); 2464 RETVAL = boolSV (api_ready (aTHX_ self));
1295 OUTPUT:
1296 RETVAL
1297
1298SV *
1299is_ready (SV *self)
1300 PROTOTYPE: $
1301 CODE:
1302 RETVAL = boolSV (api_is_ready (self));
1303 OUTPUT: 2465 OUTPUT:
1304 RETVAL 2466 RETVAL
1305 2467
1306int 2468int
1307nready (...) 2469nready (...)
… …
1309 CODE: 2471 CODE:
1310 RETVAL = coro_nready; 2472 RETVAL = coro_nready;
1311 OUTPUT: 2473 OUTPUT:
1312 RETVAL 2474 RETVAL
1313 2475
2476# for async_pool speedup
2477void
2478_pool_1 (SV *cb)
2479 CODE:
2480{
2481 struct coro *coro = SvSTATE (coro_current);
2482 HV *hv = (HV *)SvRV (coro_current);
2483 AV *defav = GvAV (PL_defgv);
2484 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2485 AV *invoke_av;
2486 int i, len;
2487
2488 if (!invoke)
2489 {
2490 SV *old = PL_diehook;
2491 PL_diehook = 0;
2492 SvREFCNT_dec (old);
2493 croak ("\3async_pool terminate\2\n");
2494 }
2495
2496 SvREFCNT_dec (coro->saved_deffh);
2497 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2498
2499 hv_store (hv, "desc", sizeof ("desc") - 1,
2500 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2501
2502 invoke_av = (AV *)SvRV (invoke);
2503 len = av_len (invoke_av);
2504
2505 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2506
2507 if (len > 0)
2508 {
2509 av_fill (defav, len - 1);
2510 for (i = 0; i < len; ++i)
2511 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2512 }
2513}
2514
2515void
2516_pool_2 (SV *cb)
2517 CODE:
2518{
2519 struct coro *coro = SvSTATE (coro_current);
2520
2521 sv_setsv (cb, &PL_sv_undef);
2522
2523 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2524 coro->saved_deffh = 0;
2525
2526 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2527 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 av_clear (GvAV (PL_defgv));
2536 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2537 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2538
2539 coro->prio = 0;
2540
2541 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2542 api_trace (aTHX_ coro_current, 0);
2543
2544 av_push (av_async_pool, newSVsv (coro_current));
2545}
2546
2547
1314MODULE = Coro::State PACKAGE = Coro::AIO 2548MODULE = Coro::State PACKAGE = Coro::AIO
1315 2549
1316SV * 2550void
1317_get_state () 2551_get_state (SV *self)
2552 PROTOTYPE: $
1318 CODE: 2553 PPCODE:
1319{ 2554{
1320 struct io_state *data; 2555 AV *defav = GvAV (PL_defgv);
1321 2556 AV *av = newAV ();
2557 int i;
1322 RETVAL = newSV (sizeof (struct io_state)); 2558 SV *data_sv = newSV (sizeof (struct io_state));
1323 data = (struct io_state *)SvPVX (RETVAL); 2559 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1324 SvCUR_set (RETVAL, sizeof (struct io_state)); 2560 SvCUR_set (data_sv, sizeof (struct io_state));
1325 SvPOK_only (RETVAL); 2561 SvPOK_only (data_sv);
1326 2562
1327 data->errorno = errno; 2563 data->errorno = errno;
1328 data->laststype = PL_laststype; 2564 data->laststype = PL_laststype;
1329 data->laststatval = PL_laststatval; 2565 data->laststatval = PL_laststatval;
1330 data->statcache = PL_statcache; 2566 data->statcache = PL_statcache;
2567
2568 av_extend (av, AvFILLp (defav) + 1 + 1);
2569
2570 for (i = 0; i <= AvFILLp (defav); ++i)
2571 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2572
2573 av_push (av, data_sv);
2574
2575 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2576
2577 api_ready (aTHX_ self);
1331} 2578}
1332 OUTPUT:
1333 RETVAL
1334 2579
1335void 2580void
1336_set_state (char *data_) 2581_set_state (SV *state)
1337 PROTOTYPE: $ 2582 PROTOTYPE: $
1338 CODE: 2583 PPCODE:
1339{ 2584{
1340 struct io_state *data = (void *)data_; 2585 AV *av = (AV *)SvRV (state);
2586 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2587 int i;
1341 2588
1342 errno = data->errorno; 2589 errno = data->errorno;
1343 PL_laststype = data->laststype; 2590 PL_laststype = data->laststype;
1344 PL_laststatval = data->laststatval; 2591 PL_laststatval = data->laststatval;
1345 PL_statcache = data->statcache; 2592 PL_statcache = data->statcache;
1346}
1347 2593
2594 EXTEND (SP, AvFILLp (av));
2595 for (i = 0; i < AvFILLp (av); ++i)
2596 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2597}
2598
2599
2600MODULE = Coro::State PACKAGE = Coro::AnyEvent
2601
2602BOOT:
2603 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2604
2605void
2606_schedule (...)
2607 CODE:
2608{
2609 static int incede;
2610
2611 api_cede_notself (aTHX);
2612
2613 ++incede;
2614 while (coro_nready >= incede && api_cede (aTHX))
2615 ;
2616
2617 sv_setsv (sv_activity, &PL_sv_undef);
2618 if (coro_nready >= incede)
2619 {
2620 PUSHMARK (SP);
2621 PUTBACK;
2622 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2623 SPAGAIN;
2624 }
2625
2626 --incede;
2627}
2628
2629
2630MODULE = Coro::State PACKAGE = PerlIO::cede
2631
2632BOOT:
2633 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2634
2635MODULE = Coro::State PACKAGE = Coro::Semaphore
2636
2637SV *
2638new (SV *klass, SV *count_ = 0)
2639 CODE:
2640{
2641 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2642 AV *av = newAV ();
2643 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2644 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2645}
2646 OUTPUT:
2647 RETVAL
2648
2649SV *
2650count (SV *self)
2651 CODE:
2652 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2653 OUTPUT:
2654 RETVAL
2655
2656void
2657up (SV *self, int adjust = 1)
2658 ALIAS:
2659 adjust = 1
2660 CODE:
2661{
2662 AV *av = (AV *)SvRV (self);
2663 SV *count_sv = AvARRAY (av)[0];
2664 IV count = SvIVX (count_sv);
2665
2666 count += ix ? adjust : 1;
2667 SvIVX (count_sv) = count;
2668
2669 /* now wake up as many waiters as possible */
2670 while (count > 0 && AvFILLp (av) >= count)
2671 {
2672 SV *cb;
2673
2674 /* swap first two elements so we can shift a waiter */
2675 AvARRAY (av)[0] = AvARRAY (av)[1];
2676 AvARRAY (av)[1] = count_sv;
2677 cb = av_shift (av);
2678
2679 if (SvOBJECT (cb))
2680 api_ready (aTHX_ cb);
2681 else
2682 croak ("callbacks not yet supported");
2683
2684 SvREFCNT_dec (cb);
2685 }
2686}
2687
2688void
2689down (SV *self)
2690 CODE:
2691 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2692
2693void
2694try (SV *self)
2695 PPCODE:
2696{
2697 AV *av = (AV *)SvRV (self);
2698 SV *count_sv = AvARRAY (av)[0];
2699 IV count = SvIVX (count_sv);
2700
2701 if (count > 0)
2702 {
2703 --count;
2704 SvIVX (count_sv) = count;
2705 XSRETURN_YES;
2706 }
2707 else
2708 XSRETURN_NO;
2709}
2710
2711void
2712waiters (SV *self)
2713 CODE:
2714{
2715 AV *av = (AV *)SvRV (self);
2716
2717 if (GIMME_V == G_SCALAR)
2718 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2719 else
2720 {
2721 int i;
2722 EXTEND (SP, AvFILLp (av) + 1 - 1);
2723 for (i = 1; i <= AvFILLp (av); ++i)
2724 PUSHs (newSVsv (AvARRAY (av)[i]));
2725 }
2726}
2727

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