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Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.275 by root, Sat Nov 15 06:26:52 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.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
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
33 105
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 107# undef CORO_STACKGUARD
36#endif 108#endif
37 109
38#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 111# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
51# endif 153# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61 154
62#define SUB_INIT "Coro::State::initialize"
63
64/* The next macro should declare a variable stacklevel that contains and approximation
65 * to the current C stack pointer. Its property is that it changes with each call
66 * and should be unique. */
67#define dSTACKLEVEL void *stacklevel = &stacklevel
68
69#define IN_DESTRUCT (PL_main_cv == Nullcv)
70
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else 155#else
156
80# define LOCK (void)0 157# define LOCK (void)0
81# define UNLOCK (void)0 158# define UNLOCK (void)0
82#endif
83 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
85static 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;
86static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
87static 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;
88 187
89/* this is actually not only the c stack but also c registers etc... */ 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;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
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
214/* this is a structure representing a c-level coroutine */
90typedef struct { 215typedef struct coro_cctx
91 int refcnt; /* pointer reference counter */ 216{
92 int usecnt; /* shared by how many coroutines */ 217 struct coro_cctx *next;
93 int gencnt; /* generation counter */
94 218
219 /* the stack */
220 void *sptr;
221 size_t ssize;
222
223 /* cpu state */
224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
226 JMPENV *top_env;
95 coro_context cctx; 227 coro_context cctx;
96 228
97 void *sptr; 229 U32 gen;
98 long ssize; /* positive == mmap, otherwise malloc */ 230#if CORO_USE_VALGRIND
99} coro_stack; 231 int valgrind_id;
232#endif
233 unsigned char flags;
234} coro_cctx;
100 235
236enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
242
243/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct
245{
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
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 */
101struct coro { 258struct coro {
102 /* the optional C context */ 259 /* the C coroutine allocated to this perl coroutine, if any */
103 coro_stack *stack; 260 coro_cctx *cctx;
104 void *cursp;
105 int gencnt;
106 261
107 /* optionally saved, might be zero */ 262 /* process data */
108 AV *defav; 263 struct CoroSLF slf_frame; /* saved slf frame */
109 SV *defsv;
110 SV *errsv;
111
112 /* saved global state not related to stacks */
113 U8 dowarn;
114 I32 in_eval;
115
116 /* the stacks and related info (callchain etc..) */
117 PERL_SI *curstackinfo;
118 AV *curstack;
119 AV *mainstack; 264 AV *mainstack;
120 SV **stack_sp; 265 perl_slots *slot; /* basically the saved sp */
121 OP *op; 266
122 SV **curpad; 267 AV *args; /* data associated with this coroutine (initial args) */
123 AV *comppad; 268 int refcnt; /* coroutines are refcounted, yes */
124 CV *compcv; 269 int flags; /* CF_ flags */
125 SV **stack_base; 270 HV *hv; /* the perl hash associated with this coro, if any */
126 SV **stack_max; 271
127 SV **tmps_stack; 272 /* statistics */
128 I32 tmps_floor; 273 int usecount; /* number of transfers to this coro */
129 I32 tmps_ix;
130 I32 tmps_max;
131 I32 *markstack;
132 I32 *markstack_ptr;
133 I32 *markstack_max;
134 I32 *scopestack;
135 I32 scopestack_ix;
136 I32 scopestack_max;
137 ANY *savestack;
138 I32 savestack_ix;
139 I32 savestack_max;
140 OP **retstack;
141 I32 retstack_ix;
142 I32 retstack_max;
143 PMOP *curpm;
144 COP *curcop;
145 JMPENV *top_env;
146 274
147 /* coro process data */ 275 /* coro process data */
148 int prio; 276 int prio;
277 SV *throw; /* exception to be thrown */
149 278
150 /* data associated with this coroutine (initial args) */ 279 /* async_pool */
151 AV *args; 280 SV *saved_deffh;
152 int refcnt; 281
282 /* linked list */
283 struct coro *next, *prev;
153}; 284};
154 285
155typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
157 288
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
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
158static AV * 339static AV *
159coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
160{ 341{
161 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
163 344
164 newpadlist = newAV (); 345 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 351#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 353 --AvFILLp (padlist);
173 354
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
176 357
177 return newpadlist; 358 return newpadlist;
178} 359}
179 360
… …
209 390
210 /* casting is fun. */ 391 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 393 free_padlist (aTHX_ padlist);
213 394
214 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 396
216 return 0; 397 return 0;
217} 398}
218 399
219#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
220 402
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222 443
223/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
224static void 445static void
225get_padlist (pTHX_ CV *cv) 446get_padlist (pTHX_ CV *cv)
226{ 447{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
228 450
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 453 else
232 { 454 {
233#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 458 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
239#else 462#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 466}
244 467
245static void 468static void
246put_padlist (pTHX_ CV *cv) 469put_padlist (pTHX_ CV *cv)
247{ 470{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
249 473
250 if (!mg) 474 if (expect_false (!mg))
251 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 476
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
259}
260 478
261#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
263 481
264#define LOAD(state) load_state(aTHX_ (state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 483}
266 484
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
268 486
269static void 487static void
270load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
271{ 489{
272 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 491 c->slot = 0;
274 492
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 PL_top_env = c->top_env;
306 494
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
310 503
311 { 504 {
312 dSP; 505 dSP;
506
313 CV *cv; 507 CV *cv;
314 508
315 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
317 { 511 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
324 } 514 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 515 }
328 516
329 PUTBACK; 517 PUTBACK;
330 } 518 }
331}
332 519
520 slf_frame = c->slf_frame;
521}
522
333static void 523static void
334save_state(pTHX_ Coro__State c, int flags) 524save_perl (pTHX_ Coro__State c)
335{ 525{
526 c->slf_frame = slf_frame;
527
336 { 528 {
337 dSP; 529 dSP;
338 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
340 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
342 /* 534 /*
343 * 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
344 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
345 */ 537 */
346 538
347 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
349 for (;;) 541 for (;;)
350 { 542 {
351 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
352 { 544 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
354 546
355 if (CxTYPE(cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 548 {
357 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
550
358 if (CvDEPTH(cv)) 551 if (expect_true (CvDEPTH (cv)))
359 { 552 {
360 EXTEND (SP, CvDEPTH(cv)*2); 553 EXTEND (SP, 3);
361
362 while (--CvDEPTH(cv))
363 {
364 /* this tells the restore code to increment CvDEPTH */
365 PUSHs (Nullsv);
366 PUSHs ((SV *)cv);
367 }
368
369 PUSHs ((SV *)CvPADLIST(cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
371 557
558 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 559 get_padlist (aTHX_ cv);
373 } 560 }
374 } 561 }
375#ifdef CXt_FORMAT
376 else if (CxTYPE(cx) == CXt_FORMAT)
377 {
378 /* I never used formats, so how should I know how these are implemented? */
379 /* my bold guess is as a simple, plain sub... */
380 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381 }
382#endif
383 } 562 }
384 563
385 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 565 break;
387 566
388 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
391 } 570 }
392 571
393 PUTBACK; 572 PUTBACK;
394 } 573 }
395 574
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 586
400 c->dowarn = PL_dowarn;
401 c->in_eval = PL_in_eval;
402
403 c->curstackinfo = PL_curstackinfo;
404 c->curstack = PL_curstack;
405 c->mainstack = PL_mainstack; 587 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 588
407 c->op = PL_op; 589 {
408 c->curpad = PL_curpad; 590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 591
410 c->compcv = PL_compcv; 592 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 593 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 594 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 595 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 596
415 c->tmps_ix = PL_tmps_ix; 597 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 598 # include "state.h"
417 c->markstack = PL_markstack; 599 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 600 }
419 c->markstack_max = PL_markstack_max;
420 c->scopestack = PL_scopestack;
421 c->scopestack_ix = PL_scopestack_ix;
422 c->scopestack_max = PL_scopestack_max;
423 c->savestack = PL_savestack;
424 c->savestack_ix = PL_savestack_ix;
425 c->savestack_max = PL_savestack_max;
426#if PERL_VERSION < 9
427 c->retstack = PL_retstack;
428 c->retstack_ix = PL_retstack_ix;
429 c->retstack_max = PL_retstack_max;
430#endif
431 c->curpm = PL_curpm;
432 c->curcop = PL_curcop;
433 c->top_env = PL_top_env;
434} 601}
435 602
436/* 603/*
437 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
441 */ 608 */
609#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks
611#else
442static void 612static void
443coro_init_stacks (pTHX) 613coro_init_stacks (pTHX)
444{ 614{
445 LOCK; 615 PL_curstackinfo = new_stackinfo(32, 8);
446
447 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 619
452 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 623
456 New(50,PL_tmps_stack,96,SV*); 624 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 627 PL_tmps_max = 32;
460 628
461 New(54,PL_markstack,16,I32); 629 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 631 PL_markstack_max = PL_markstack + 16;
464 632
465#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
467#endif 635#endif
468 636
469 New(54,PL_scopestack,16,I32); 637 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 639 PL_scopestack_max = 8;
472 640
473 New(54,PL_savestack,96,ANY); 641 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 643 PL_savestack_max = 24;
476 644
477#if PERL_VERSION < 9 645#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 646 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 648 PL_retstack_max = 4;
481#endif 649#endif
482
483 UNLOCK;
484} 650}
651#endif
485 652
486/* 653/*
487 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
488 */ 655 */
489static void 656static void
490destroy_stacks(pTHX) 657coro_destruct_stacks (pTHX)
491{ 658{
492 if (!IN_DESTRUCT)
493 {
494 /* is this ugly, I ask? */
495 LEAVE_SCOPE (0);
496
497 /* sure it is, but more important: is it correct?? :/ */
498 FREETMPS;
499
500 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501 }
502
503 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
505 661
506 while (PL_curstackinfo) 662 while (PL_curstackinfo)
507 { 663 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 664 PERL_SI *p = PL_curstackinfo->si_prev;
509 665
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 666 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 667 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 668
522 Safefree (PL_curstackinfo->si_cxstack); 669 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 670 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 671 PL_curstackinfo = p;
525 } 672 }
526 673
527 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 675 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 677 Safefree (PL_savestack);
531#if PERL_VERSION < 9 678#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 679 Safefree (PL_retstack);
533#endif 680#endif
534} 681}
535 682
536static void 683static size_t
537allocate_stack (Coro__State ctx, int alloc) 684coro_rss (pTHX_ struct coro *coro)
538{ 685{
539 coro_stack *stack; 686 size_t rss = sizeof (*coro);
540 687
541 New (0, stack, 1, coro_stack); 688 if (coro->mainstack)
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546
547 if (alloc)
548 { 689 {
549#if HAVE_MMAP 690 perl_slots tmp_slot;
550 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 691 perl_slots *slot;
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 692
552 if (stack->sptr != (void *)-1) 693 if (coro->flags & CF_RUNNING)
553 { 694 {
554# if STACKGUARD 695 slot = &tmp_slot;
555 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 696
556# endif 697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
557 } 700 }
558 else 701 else
559#endif 702 slot = coro->slot;
703
704 if (slot)
560 { 705 {
561 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 706 rss += sizeof (slot->curstackinfo);
562 New (0, stack->sptr, STACKSIZE, long); 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
563 } 717 }
564 } 718 }
565 else
566 stack->sptr = 0;
567 719
568 ctx->stack = stack; 720 return rss;
569} 721}
570 722
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 */
571static void 745static int
572deallocate_stack (Coro__State ctx) 746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
573{ 747{
574 coro_stack *stack = ctx->stack; 748 const char *s = MgPV_nolen_const (mg);
575 749
576 ctx->stack = 0; 750 if (*s == '_')
577
578 if (stack)
579 { 751 {
580 if (!--stack->refcnt) 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)
581 { 758 {
582#ifdef HAVE_MMAP 759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
583 if (stack->ssize > 0 && stack->sptr) 760 return 0;
584 munmap (stack->sptr, stack->ssize);
585 else
586#endif
587 Safefree (stack->sptr);
588
589 Safefree (stack);
590 } 761 }
591 else if (ctx->gencnt == stack->gencnt) 762 }
592 --stack->usecnt; 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 == '_')
593 } 773 {
594} 774 SV **svp = 0;
595 775
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
596static void 791static int
597setup_coro (void *arg) 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 (aTHX_ 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 (aTHX)
824{
825 return 0;
826}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
598{ 830{
599 /* 831 /*
600 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
601 */ 833 */
602 dTHX;
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX); 834 coro_init_stacks (aTHX);
608 /*PL_curcop = 0;*/ 835
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882
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));
610 SvREFCNT_dec (GvAV (PL_defgv)); 904 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
612 909
613 SPAGAIN; 910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
614 915
615 if (ctx->stack) 916 coro_destruct_stacks (aTHX);
616 { 917}
617 ctx->cursp = 0;
618 918
619 PUSHMARK(SP); 919INLINE void
620 PUTBACK; 920free_coro_mortal (pTHX)
621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 921{
622 922 if (expect_true (coro_mortal))
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
626 croak ("FATAL: CCTXT coroutine returned!");
627 } 923 {
628 else 924 SvREFCNT_dec (coro_mortal);
925 coro_mortal = 0;
629 { 926 }
630 UNOP myop; 927}
631 928
632 Zero(&myop, 1, UNOP); 929static int
633 myop.op_next = Nullop; 930runops_trace (pTHX)
634 myop.op_flags = OPf_WANT_VOID; 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;
635 936
636 PL_op = (OP *)&myop; 937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
637
638 PUSHMARK(SP);
639 XPUSHs (sub_init);
640 /*
641 * the next line is slightly wrong, as PL_op->op_next
642 * is actually being executed so we skip the first op.
643 * that doesn't matter, though, since it is only
644 * pp_nextstate and we never return...
645 * ah yes, and I don't care anyways ;)
646 */
647 PUTBACK;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN;
650
651 ENTER; /* necessary e.g. for dounwind */
652 } 938 {
653} 939 PERL_ASYNC_CHECK ();
654 940
655static void 941 if (cctx->flags & CC_TRACE_ALL)
656continue_coro (void *arg)
657{
658 /*
659 * this is a _very_ stripped down perl interpreter ;)
660 */
661 dTHX;
662 Coro__State ctx = (Coro__State)arg;
663
664 PL_top_env = &PL_start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673/* never call directly, always through the coro_state_transfer global variable */
674static void
675transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
676{
677 dSTACKLEVEL;
678
679 if (prev != next)
680 {
681 /* has this coro been created yet? */
682 if (next->mainstack)
683 { 942 {
684 LOCK; 943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
685 SAVE (prev, flags);
686 LOAD (next);
687 UNLOCK;
688
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 { 944 {
696 if (!prev->stack) 945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 allocate_stack (prev, 0); 946 SV **bot, **top;
698 else if (prev->cursp != stacklevel 947 AV *av = newAV (); /* return values */
699 && prev->stack->usecnt > 1) 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)
700 { 987 {
701 prev->gencnt = ++prev->stack->gencnt; 988 SV **cb;
702 prev->stack->usecnt = 1;
703 }
704 989
705 /* has our stack been invalidated? */ 990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 { 991 {
708 deallocate_stack (next); 992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
709 allocate_stack (next, 1); 993
710 coro_create (&(next->stack->cctx), 994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
711 continue_coro, (void *)next, 995 {
712 next->stack->sptr, labs (next->stack->ssize)); 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;
713 } 1022 }
714 1023
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1024 if (cctx->flags & CC_TRACE_LINE)
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else
725 {
726 LOCK;
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729
730 /* create the coroutine for the first time */
731 if (flags & TRANSFER_SAVE_CCTXT)
732 {
733 if (!prev->stack)
734 allocate_stack (prev, 0);
735
736 /* the new coroutine starts with start_env again */
737 PL_top_env = &PL_start_env;
738
739 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740 { 1025 {
741 setup_coro (next); 1026 dSP;
742 next->cursp = stacklevel;
743 1027
744 prev->stack->refcnt++; 1028 PL_runops = RUNOPS_DEFAULT;
745 prev->stack->usecnt++; 1029 ENTER;
746 next->stack = prev->stack; 1030 SAVETMPS;
747 next->gencnt = prev->gencnt; 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;
748 } 1043 }
749 else
750 {
751 assert (!next->stack);
752 allocate_stack (next, 1);
753 coro_create (&(next->stack->cctx),
754 setup_coro, (void *)next,
755 next->stack->sptr, labs (next->stack->ssize));
756 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757 prev->cursp = stacklevel;
758 /* don't add any code here */
759 } 1044 }
760 } 1045 }
761 else
762 {
763 setup_coro (next);
764 next->cursp = stacklevel;
765 }
766 } 1046 }
767 } 1047 }
768 1048
769 LOCK; 1049 TAINT_NOT;
770 if (coro_mortal) 1050 return 0;
771 { 1051}
772 SvREFCNT_dec (coro_mortal); 1052
773 coro_mortal = 0; 1053static void
774 } 1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
1064static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx)
1066{
1067 dSP;
1068 UNOP myop;
1069
1070 PL_top_env = &PL_start_env;
1071
1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
1074
1075 Zero (&myop, 1, UNOP);
1076 myop.op_next = PL_op;
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1078
1079 PUSHMARK (SP);
1080 EXTEND (SP, 2);
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1083 PUTBACK;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086 SPAGAIN;
1087}
1088
1089/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void
1091transfer_tail (pTHX)
1092{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097 free_coro_mortal (aTHX);
775 UNLOCK; 1098 UNLOCK;
776}
777 1099
778/* use this function pointer to call the above function */ 1100 if (expect_false (next->throw))
779/* this is done to increase chances of the compiler not inlining the call */ 1101 {
780void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1102 SV *exception = sv_2mortal (next->throw);
781 1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
782static void 1113static void
783coro_state_destroy (struct coro *coro) 1114cctx_run (void *arg)
784{ 1115{
785 if (coro->refcnt--) 1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
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
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
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
1135 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op;
1137 perl_run (PL_curinterp);
1138
1139 /*
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 }
1149}
1150
1151static coro_cctx *
1152cctx_new ()
1153{
1154 coro_cctx *cctx;
1155
1156 ++cctx_count;
1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
1185
1186#if HAVE_MMAP
1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1188 /* mmap supposedly does allocate-on-write for us */
1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1190
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;
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 {
1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1209 _exit (EXIT_FAILURE);
1210 }
1211
1212 stack_start = cctx->sptr;
1213 stack_size = cctx->ssize;
1214 }
1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1218 #endif
1219
1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1221
1222 return cctx;
1223}
1224
1225static void
1226cctx_destroy (coro_cctx *cctx)
1227{
1228 if (!cctx)
786 return; 1229 return;
787 1230
1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
1233
1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1239 #endif
1240
1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
1243 munmap (cctx->sptr, cctx->ssize);
1244 else
1245#endif
1246 Safefree (cctx->sptr);
1247 }
1248
1249 Safefree (cctx);
1250}
1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
1255static coro_cctx *
1256cctx_get (pTHX)
1257{
1258 while (expect_true (cctx_first))
1259 {
1260 coro_cctx *cctx = cctx_first;
1261 cctx_first = cctx->next;
1262 --cctx_idle;
1263
1264 if (expect_true (!CCTX_EXPIRED (cctx)))
1265 return cctx;
1266
1267 cctx_destroy (cctx);
1268 }
1269
1270 return cctx_new_run ();
1271}
1272
1273static void
1274cctx_put (coro_cctx *cctx)
1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
1278 /* free another cctx if overlimit */
1279 if (expect_false (cctx_idle >= cctx_max_idle))
1280 {
1281 coro_cctx *first = cctx_first;
1282 cctx_first = first->next;
1283 --cctx_idle;
1284
1285 cctx_destroy (first);
1286 }
1287
1288 ++cctx_idle;
1289 cctx->next = cctx_first;
1290 cctx_first = cctx;
1291}
1292
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 */
1317static void NOINLINE
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{
1320 dSTACKLEVEL;
1321
1322 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next))
1324 {
1325 ((coro_cctx *)prev)->idle_sp = stacklevel;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 }
1328 else if (expect_true (prev != next))
1329 {
1330 coro_cctx *prev__cctx;
1331
1332 if (expect_false (prev->flags & CF_NEW))
1333 {
1334 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING;
1338 }
1339
1340 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344
1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
1348 if (expect_false (next->flags & CF_NEW))
1349 {
1350 /* need to start coroutine */
1351 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */
1353 coro_setup (aTHX_ next);
1354 }
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 == stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
1366 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
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);
1379 }
1380
1381 ++next->usecount;
1382
1383 if (expect_true (!next->cctx))
1384 next->cctx = cctx_get (aTHX);
1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1388
1389 if (expect_false (prev__cctx != next->cctx))
1390 {
1391 prev__cctx->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1394 }
1395
1396 transfer_tail (aTHX);
1397 }
1398}
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;
1419 UNLOCK;
1420 }
1421 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423
788 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
789 { 1425 {
790 struct coro temp; 1426 struct coro temp;
791 1427
792 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1429
1430 save_perl (aTHX_ &temp);
793 LOAD (aTHX_ coro); 1431 load_perl (aTHX_ coro);
794 1432
795 destroy_stacks (aTHX); 1433 coro_destruct (aTHX_ coro);
796 1434
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1435 load_perl (aTHX_ &temp);
798 1436
799 coro->mainstack = 0; 1437 coro->slot = 0;
800 } 1438 }
801 1439
802 deallocate_stack (coro); 1440 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
804 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;
805} 1448}
806 1449
807static int 1450static int
808coro_state_clear (SV *sv, MAGIC *mg) 1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809{ 1452{
810 struct coro *coro = (struct coro *)mg->mg_ptr; 1453 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0; 1454 mg->mg_ptr = 0;
812 1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
813 coro_state_destroy (coro); 1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
814 1463
815 return 0; 1464 return 0;
816} 1465}
817 1466
818static int 1467static int
819coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1468coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820{ 1469{
821 struct coro *coro = (struct coro *)mg->mg_ptr; 1470 struct coro *coro = (struct coro *)mg->mg_ptr;
822 1471
823 ++coro->refcnt; 1472 ++coro->refcnt;
824 1473
825 return 0; 1474 return 0;
826} 1475}
827 1476
828static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1477static MGVTBL coro_state_vtbl = {
1478 0, 0, 0, 0,
1479 coro_state_free,
1480 0,
1481#ifdef MGf_DUP
1482 coro_state_dup,
1483#else
1484# define MGf_DUP 0
1485#endif
1486};
829 1487
830static struct coro *
831SvSTATE (SV *coro)
832{
833 HV *stash;
834 MAGIC *mg;
835
836 if (SvROK (coro))
837 coro = SvRV (coro);
838
839 stash = SvSTASH (coro);
840 if (stash != coro_stash && stash != coro_state_stash)
841 {
842 /* very slow, but rare, check */
843 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
844 croak ("Coro::State object required");
845 }
846
847 mg = SvMAGIC (coro);
848 assert (mg->mg_type == PERL_MAGIC_ext);
849 return (struct coro *)mg->mg_ptr;
850}
851
852static void 1488static void
1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1490{
1491 ta->prev = SvSTATE (prev_sv);
1492 ta->next = SvSTATE (next_sv);
1493 TRANSFER_CHECK (*ta);
1494}
1495
1496static void
853api_transfer (pTHX_ SV *prev, SV *next, int flags) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
854{ 1498{
855 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1499 struct coro_transfer_args ta;
1500
1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1502 TRANSFER (ta, 1);
856} 1503}
857 1504
858/** Coro ********************************************************************/ 1505/** Coro ********************************************************************/
859 1506
860#define PRIO_MAX 3
861#define PRIO_HIGH 1
862#define PRIO_NORMAL 0
863#define PRIO_LOW -1
864#define PRIO_IDLE -3
865#define PRIO_MIN -4
866
867/* for Coro.pm */
868static GV *coro_current, *coro_idle;
869static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870static int coro_nready;
871
872static void 1507static void
873coro_enq (pTHX_ SV *sv) 1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
874{ 1515{
875 int prio; 1516 int prio;
876 1517
877 if (SvTYPE (sv) != SVt_PVHV) 1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
878 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
879 1521
880 prio = SvSTATE (sv)->prio; 1522 return 0;
1523}
881 1524
882 av_push (coro_ready [prio - PRIO_MIN], sv); 1525static int
1526api_ready (pTHX_ SV *coro_sv)
1527{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv);
1536
1537 if (coro->flags & CF_READY)
1538 return 0;
1539
1540 coro->flags |= CF_READY;
1541
1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
883 coro_nready++; 1548 ++coro_nready;
1549
1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570
1571 return 1;
1572}
1573
1574static int
1575api_is_ready (pTHX_ SV *coro_sv)
1576{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578}
1579
1580INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1582{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1633 LOCK;
1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1636 UNLOCK;
1637}
1638
1639INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{
1642 api_ready (aTHX_ coro_current);
1643 prepare_schedule (aTHX_ ta);
1644}
1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
1655 }
1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1667}
1668
1669static int
1670api_cede (pTHX)
1671{
1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static int
1686api_cede_notself (pTHX)
1687{
1688 if (coro_nready)
1689 {
1690 struct coro_transfer_args ta;
1691
1692 prepare_cede_notself (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694 return 1;
1695 }
1696 else
1697 return 0;
1698}
1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
1725#if 0
1726static int
1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1728{
1729 AV *padlist;
1730 AV *av = (AV *)mg->mg_obj;
1731
1732 abort ();
1733
1734 return 0;
1735}
1736
1737static MGVTBL coro_gensub_vtbl = {
1738 0, 0, 0, 0,
1739 coro_gensub_free
1740};
1741#endif
1742
1743/*****************************************************************************/
1744/* PerlIO::cede */
1745
1746typedef struct
1747{
1748 PerlIOBuf base;
1749 NV next, every;
1750} PerlIOCede;
1751
1752static IV
1753PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1758 self->next = nvtime () + self->every;
1759
1760 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
884} 1761}
885 1762
886static SV * 1763static SV *
887coro_deq (pTHX_ int min_prio) 1764PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
888{ 1765{
889 int prio = PRIO_MAX - PRIO_MIN; 1766 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
890 1767
891 min_prio -= PRIO_MIN; 1768 return newSVnv (self->every);
892 if (min_prio < 0) 1769}
893 min_prio = 0;
894 1770
895 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1771static IV
896 if (AvFILLp (coro_ready [prio]) >= 0) 1772PerlIOCede_flush (pTHX_ PerlIO *f)
1773{
1774 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1775 double now = nvtime ();
1776
1777 if (now >= self->next)
1778 {
1779 api_cede (aTHX);
1780 self->next = now + self->every;
1781 }
1782
1783 return PerlIOBuf_flush (aTHX_ f);
1784}
1785
1786static PerlIO_funcs PerlIO_cede =
1787{
1788 sizeof(PerlIO_funcs),
1789 "cede",
1790 sizeof(PerlIOCede),
1791 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1792 PerlIOCede_pushed,
1793 PerlIOBuf_popped,
1794 PerlIOBuf_open,
1795 PerlIOBase_binmode,
1796 PerlIOCede_getarg,
1797 PerlIOBase_fileno,
1798 PerlIOBuf_dup,
1799 PerlIOBuf_read,
1800 PerlIOBuf_unread,
1801 PerlIOBuf_write,
1802 PerlIOBuf_seek,
1803 PerlIOBuf_tell,
1804 PerlIOBuf_close,
1805 PerlIOCede_flush,
1806 PerlIOBuf_fill,
1807 PerlIOBase_eof,
1808 PerlIOBase_error,
1809 PerlIOBase_clearerr,
1810 PerlIOBase_setlinebuf,
1811 PerlIOBuf_get_base,
1812 PerlIOBuf_bufsiz,
1813 PerlIOBuf_get_ptr,
1814 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt,
1816};
1817
1818/*****************************************************************************/
1819
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP *
1831pp_restore (pTHX)
1832{
1833 dSP;
1834
1835 PUSHMARK (SP);
1836
1837 EXTEND (SP, 3);
1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841 PUSHs ((SV *)CvGV (slf_cv));
1842
1843 RETURNOP (slf_restore.op_first);
1844}
1845
1846static void
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851
1852static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1856
1857 frame->prepare = slf_prepare_set_stacklevel;
1858 frame->check = slf_check_nop;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861
1862static void
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 {
1921 /* first iteration */
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926
1927 /* do a quick consistency check on the "function" object, and if it isn't */
1928 /* for us, divert to the real entersub */
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1930 return PL_ppaddr[OP_ENTERSUB](aTHX);
1931
1932 /* pop args */
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
1936 {
1937 /* ampersand-form of call, use @_ instead of stack */
1938 AV *av = GvAV (PL_defgv);
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 }
1942
1943 PUTBACK;
1944
1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
1953 {
1954 struct coro_transfer_args ta;
1955
1956 slf_frame.prepare (aTHX_ &ta);
1957 TRANSFER (ta, 0);
1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
1967
1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
897 { 1972 {
898 coro_nready--; 1973 if (sp == bot)
899 return av_shift (coro_ready [prio]); 1974 XPUSHs (&PL_sv_undef);
1975
1976 SP = bot + 1;
900 } 1977 }
901 1978
902 return 0;
903}
904
905static void
906api_ready (SV *coro)
907{
908 dTHX;
909
910 if (SvROK (coro))
911 coro = SvRV (coro);
912
913 LOCK;
914 coro_enq (aTHX_ SvREFCNT_inc (coro));
915 UNLOCK;
916}
917
918static void
919api_schedule (void)
920{
921 dTHX;
922
923 SV *prev, *next;
924 SV *current = GvSV (coro_current);
925
926 for (;;)
927 {
928 LOCK;
929
930 next = coro_deq (aTHX_ PRIO_MIN);
931
932 if (next)
933 break;
934
935 UNLOCK;
936
937 {
938 dSP;
939
940 ENTER;
941 SAVETMPS;
942
943 PUSHMARK (SP);
944 PUTBACK; 1979 PUTBACK;
945 call_sv (GvSV (coro_idle), G_DISCARD); 1980 }
946 1981
947 FREETMPS; 1982 return NORMAL;
948 LEAVE; 1983}
1984
1985static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1987{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1989
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016}
2017
2018/*****************************************************************************/
2019
2020static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2022{
2023 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0];
2025
2026 if (SvIVX (count_sv) > 0)
2027 {
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2029 return 0;
949 } 2030 }
2031 else
950 } 2032 {
2033 int i;
2034 /* if we were woken up but can't down, we look through the whole */
2035 /* waiters list and only add us if we aren't in there already */
2036 /* this avoids some degenerate memory usage cases */
951 2037
952 prev = SvRV (current); 2038 for (i = 1; i <= AvFILLp (av); ++i)
953 SvRV (current) = next; 2039 if (AvARRAY (av)[i] == SvRV (coro_current))
2040 return 1;
954 2041
955 /* free this only after the transfer */ 2042 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
956 coro_mortal = prev; 2043 return 1;
957 2044 }
958 UNLOCK;
959
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962} 2045}
963 2046
964static void 2047static void
965api_cede (void) 2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
966{ 2049{
967 dTHX; 2050 AV *av = (AV *)SvRV (arg [0]);
968 2051
969 LOCK; 2052 if (SvIVX (AvARRAY (av)[0]) > 0)
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 2053 {
971 UNLOCK; 2054 frame->data = (void *)av;
2055 frame->prepare = prepare_nop;
2056 }
2057 else
2058 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
972 2060
973 api_schedule (); 2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
974} 2062 frame->prepare = prepare_schedule;
2063 }
975 2064
2065 frame->check = slf_check_semaphore_down;
2066
2067}
2068
976MODULE = Coro::State PACKAGE = Coro::State 2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 2070
978PROTOTYPES: DISABLE 2071PROTOTYPES: DISABLE
979 2072
980BOOT: 2073BOOT:
981{ 2074{
982#ifdef USE_ITHREADS 2075#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT;
2079# endif
984#endif 2080#endif
985 BOOT_PAGESIZE; 2081 BOOT_PAGESIZE;
986 2082
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2088 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2089
2090 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2091 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2092 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2093
987 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2094 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988 2095
989 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2096 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
990 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2097 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
991 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2098 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
992 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2099 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
993 2100
994 main_mainstack = PL_mainstack; 2101 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env;
995 2103
2104 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev;
2106
996 coroapi.ver = CORO_API_VERSION; 2107 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION;
2109
997 coroapi.transfer = api_transfer; 2110 coroapi.transfer = api_transfer;
2111
2112 coroapi.sv_state = SvSTATE_;
2113 coroapi.execute_slf = api_execute_slf;
2114 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself;
2118
2119 {
2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2121
2122 if (!svp) croak ("Time::HiRes is required");
2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2124
2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2126 }
998 2127
999 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1000} 2129}
1001 2130
1002SV * 2131SV *
1003new (char *klass, ...) 2132new (char *klass, ...)
1004 CODE: 2133 CODE:
1005{ 2134{
1006 struct coro *coro; 2135 struct coro *coro;
2136 MAGIC *mg;
1007 HV *hv; 2137 HV *hv;
1008 int i; 2138 int i;
1009 2139
1010 Newz (0, coro, 1, struct coro); 2140 Newz (0, coro, 1, struct coro);
1011 coro->args = newAV (); 2141 coro->args = newAV ();
2142 coro->flags = CF_NEW;
1012 2143
2144 if (coro_first) coro_first->prev = coro;
2145 coro->next = coro_first;
2146 coro_first = coro;
2147
2148 coro->hv = hv = newHV ();
2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2152
2153 av_extend (coro->args, items - 1);
1013 for (i = 1; i < items; i++) 2154 for (i = 1; i < items; i++)
1014 av_push (coro->args, newSVsv (ST (i))); 2155 av_push (coro->args, newSVsv (ST (i)));
1015
1016 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1017 /*coro->stack = 0;*/
1018
1019 hv = newHV ();
1020 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1021 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1022} 2156}
1023 OUTPUT: 2157 OUTPUT:
1024 RETVAL 2158 RETVAL
1025 2159
1026void 2160void
1027transfer(prev, next, flags) 2161_set_stacklevel (...)
1028 SV *prev 2162 CODE:
1029 SV *next 2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1030 int flags
1031 CODE:
1032 PUTBACK;
1033 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1034 SPAGAIN;
1035
1036int
1037prio (Coro::State coro, int newprio = 0)
1038 ALIAS:
1039 nice = 1
1040 CODE:
1041{
1042 RETVAL = coro->prio;
1043
1044 if (items > 1)
1045 {
1046 if (ix)
1047 newprio += coro->prio;
1048
1049 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1050 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1051
1052 coro->prio = newprio;
1053 }
1054}
1055 2164
1056void 2165void
1057_clone_state_from (SV *dst, SV *src) 2166transfer (...)
1058 CODE: 2167 CODE:
1059{ 2168 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1060 struct coro *coro_src = SvSTATE (src);
1061 2169
1062 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2170bool
1063 2171_destroy (SV *coro_sv)
1064 ++coro_src->refcnt; 2172 CODE:
1065 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2173 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1066} 2174 OUTPUT:
2175 RETVAL
1067 2176
1068void 2177void
1069_exit (code) 2178_exit (int code)
1070 int code
1071 PROTOTYPE: $ 2179 PROTOTYPE: $
1072 CODE: 2180 CODE:
1073 _exit (code); 2181 _exit (code);
1074 2182
1075MODULE = Coro::State PACKAGE = Coro::Cont 2183int
2184cctx_stacksize (int new_stacksize = 0)
2185 PROTOTYPE: ;$
2186 CODE:
2187 RETVAL = cctx_stacksize;
2188 if (new_stacksize)
2189 {
2190 cctx_stacksize = new_stacksize;
2191 ++cctx_gen;
2192 }
2193 OUTPUT:
2194 RETVAL
2195
2196int
2197cctx_max_idle (int max_idle = 0)
2198 PROTOTYPE: ;$
2199 CODE:
2200 RETVAL = cctx_max_idle;
2201 if (max_idle > 1)
2202 cctx_max_idle = max_idle;
2203 OUTPUT:
2204 RETVAL
2205
2206int
2207cctx_count ()
2208 PROTOTYPE:
2209 CODE:
2210 RETVAL = cctx_count;
2211 OUTPUT:
2212 RETVAL
2213
2214int
2215cctx_idle ()
2216 PROTOTYPE:
2217 CODE:
2218 RETVAL = cctx_idle;
2219 OUTPUT:
2220 RETVAL
1076 2221
1077void 2222void
1078yield (...) 2223list ()
1079 PROTOTYPE: @ 2224 PROTOTYPE:
2225 PPCODE:
2226{
2227 struct coro *coro;
2228 for (coro = coro_first; coro; coro = coro->next)
2229 if (coro->hv)
2230 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2231}
2232
2233void
2234call (Coro::State coro, SV *coderef)
2235 ALIAS:
2236 eval = 1
2237 CODE:
2238{
2239 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2240 {
2241 struct coro temp;
2242
2243 if (!(coro->flags & CF_RUNNING))
2244 {
2245 PUTBACK;
2246 save_perl (aTHX_ &temp);
2247 load_perl (aTHX_ coro);
2248 }
2249
2250 {
2251 dSP;
2252 ENTER;
2253 SAVETMPS;
2254 PUTBACK;
2255 PUSHSTACK;
2256 PUSHMARK (SP);
2257
2258 if (ix)
2259 eval_sv (coderef, 0);
2260 else
2261 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2262
2263 POPSTACK;
2264 SPAGAIN;
2265 FREETMPS;
2266 LEAVE;
2267 PUTBACK;
2268 }
2269
2270 if (!(coro->flags & CF_RUNNING))
2271 {
2272 save_perl (aTHX_ coro);
2273 load_perl (aTHX_ &temp);
2274 SPAGAIN;
2275 }
2276 }
2277}
2278
2279SV *
2280is_ready (Coro::State coro)
2281 PROTOTYPE: $
2282 ALIAS:
2283 is_ready = CF_READY
2284 is_running = CF_RUNNING
2285 is_new = CF_NEW
2286 is_destroyed = CF_DESTROYED
2287 CODE:
2288 RETVAL = boolSV (coro->flags & ix);
2289 OUTPUT:
2290 RETVAL
2291
2292void
2293throw (Coro::State self, SV *throw = &PL_sv_undef)
2294 PROTOTYPE: $;$
1080 CODE: 2295 CODE:
1081{ 2296 SvREFCNT_dec (self->throw);
1082 SV *yieldstack; 2297 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1083 SV *sv;
1084 AV *defav = GvAV (PL_defgv);
1085 struct coro *prev, *next;
1086 2298
1087 yieldstack = *hv_fetch ( 2299void
1088 (HV *)SvRV (GvSV (coro_current)), 2300api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1089 "yieldstack", sizeof ("yieldstack") - 1, 2301 PROTOTYPE: $;$
2302 C_ARGS: aTHX_ coro, flags
2303
2304SV *
2305has_cctx (Coro::State coro)
2306 PROTOTYPE: $
2307 CODE:
2308 RETVAL = boolSV (!!coro->cctx);
2309 OUTPUT:
2310 RETVAL
2311
2312int
2313is_traced (Coro::State coro)
2314 PROTOTYPE: $
2315 CODE:
2316 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2317 OUTPUT:
2318 RETVAL
2319
2320UV
2321rss (Coro::State coro)
2322 PROTOTYPE: $
2323 ALIAS:
2324 usecount = 1
2325 CODE:
2326 switch (ix)
2327 {
2328 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2329 case 1: RETVAL = coro->usecount; break;
1090 0 2330 }
2331 OUTPUT:
2332 RETVAL
2333
2334void
2335force_cctx ()
2336 PROTOTYPE:
2337 CODE:
2338 struct coro *coro = SvSTATE (coro_current);
2339 coro->cctx->idle_sp = 0;
2340
2341void
2342swap_defsv (Coro::State self)
2343 PROTOTYPE: $
2344 ALIAS:
2345 swap_defav = 1
2346 CODE:
2347 if (!self->slot)
2348 croak ("cannot swap state with coroutine that has no saved state,");
2349 else
1091 ); 2350 {
2351 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2352 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1092 2353
1093 /* set up @_ -- ugly */ 2354 SV *tmp = *src; *src = *dst; *dst = tmp;
1094 av_clear (defav); 2355 }
1095 av_fill (defav, items - 1);
1096 while (items--)
1097 av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099 sv = av_pop ((AV *)SvRV (yieldstack));
1100 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102 SvREFCNT_dec (sv);
1103
1104 coro_state_transfer (aTHX_ prev, next, 0);
1105}
1106 2356
1107MODULE = Coro::State PACKAGE = Coro 2357MODULE = Coro::State PACKAGE = Coro
1108 2358
1109BOOT: 2359BOOT:
1110{ 2360{
1111 int i; 2361 int i;
1112 2362
2363 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2364 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2365 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2366
2367 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2368 SvREADONLY_on (coro_current);
2369
1113 coro_stash = gv_stashpv ("Coro", TRUE); 2370 coro_stash = gv_stashpv ("Coro", TRUE);
1114 2371
1115 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2372 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1116 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2373 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1117 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2374 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2375 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2376 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2377 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121 2378
1122 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1123 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1124
1125 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2379 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126 coro_ready[i] = newAV (); 2380 coro_ready[i] = newAV ();
1127 2381
1128 { 2382 {
1129 SV *sv = perl_get_sv("Coro::API", 1); 2383 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1130 2384
1131 coroapi.schedule = api_schedule; 2385 coroapi.schedule = api_schedule;
1132 coroapi.cede = api_cede; 2386 coroapi.cede = api_cede;
2387 coroapi.cede_notself = api_cede_notself;
1133 coroapi.ready = api_ready; 2388 coroapi.ready = api_ready;
2389 coroapi.is_ready = api_is_ready;
1134 coroapi.nready = &coro_nready; 2390 coroapi.nready = coro_nready;
1135 coroapi.current = coro_current; 2391 coroapi.current = coro_current;
1136 2392
1137 GCoroAPI = &coroapi; 2393 GCoroAPI = &coroapi;
1138 sv_setiv (sv, (IV)&coroapi); 2394 sv_setiv (sv, (IV)&coroapi);
1139 SvREADONLY_on (sv); 2395 SvREADONLY_on (sv);
1140 } 2396 }
1141} 2397}
1142 2398
1143#if !PERL_MICRO
1144
1145void 2399void
1146ready (self) 2400schedule (...)
1147 SV * self 2401 CODE:
2402 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), items);
2403
2404void
2405cede (...)
2406 CODE:
2407 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), items);
2408
2409void
2410cede_notself (...)
2411 CODE:
2412 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), items);
2413
2414void
2415_set_current (SV *current)
1148 PROTOTYPE: $ 2416 PROTOTYPE: $
1149 CODE: 2417 CODE:
1150 api_ready (self); 2418 SvREFCNT_dec (SvRV (coro_current));
2419 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1151 2420
1152#endif 2421void
2422_set_readyhook (SV *hook)
2423 PROTOTYPE: $
2424 CODE:
2425 LOCK;
2426 SvREFCNT_dec (coro_readyhook);
2427 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2428 UNLOCK;
2429
2430int
2431prio (Coro::State coro, int newprio = 0)
2432 PROTOTYPE: $;$
2433 ALIAS:
2434 nice = 1
2435 CODE:
2436{
2437 RETVAL = coro->prio;
2438
2439 if (items > 1)
2440 {
2441 if (ix)
2442 newprio = coro->prio - newprio;
2443
2444 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2445 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2446
2447 coro->prio = newprio;
2448 }
2449}
2450 OUTPUT:
2451 RETVAL
2452
2453SV *
2454ready (SV *self)
2455 PROTOTYPE: $
2456 CODE:
2457 RETVAL = boolSV (api_ready (aTHX_ self));
2458 OUTPUT:
2459 RETVAL
1153 2460
1154int 2461int
1155nready (...) 2462nready (...)
1156 PROTOTYPE: 2463 PROTOTYPE:
1157 CODE: 2464 CODE:
1158 RETVAL = coro_nready; 2465 RETVAL = coro_nready;
1159 OUTPUT: 2466 OUTPUT:
1160 RETVAL 2467 RETVAL
1161 2468
2469# for async_pool speedup
1162void 2470void
1163schedule (...) 2471_pool_1 (SV *cb)
1164 PROTOTYPE:
1165 CODE: 2472 CODE:
1166 api_schedule (); 2473{
2474 struct coro *coro = SvSTATE (coro_current);
2475 HV *hv = (HV *)SvRV (coro_current);
2476 AV *defav = GvAV (PL_defgv);
2477 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2478 AV *invoke_av;
2479 int i, len;
2480
2481 if (!invoke)
2482 {
2483 SV *old = PL_diehook;
2484 PL_diehook = 0;
2485 SvREFCNT_dec (old);
2486 croak ("\3async_pool terminate\2\n");
2487 }
2488
2489 SvREFCNT_dec (coro->saved_deffh);
2490 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2491
2492 hv_store (hv, "desc", sizeof ("desc") - 1,
2493 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2494
2495 invoke_av = (AV *)SvRV (invoke);
2496 len = av_len (invoke_av);
2497
2498 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2499
2500 if (len > 0)
2501 {
2502 av_fill (defav, len - 1);
2503 for (i = 0; i < len; ++i)
2504 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2505 }
2506}
1167 2507
1168void 2508void
1169cede (...) 2509_pool_2 (SV *cb)
1170 PROTOTYPE:
1171 CODE: 2510 CODE:
1172 api_cede (); 2511{
2512 struct coro *coro = SvSTATE (coro_current);
1173 2513
1174# and these are hacks 2514 sv_setsv (cb, &PL_sv_undef);
2515
2516 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2517 coro->saved_deffh = 0;
2518
2519 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2520 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2521 {
2522 SV *old = PL_diehook;
2523 PL_diehook = 0;
2524 SvREFCNT_dec (old);
2525 croak ("\3async_pool terminate\2\n");
2526 }
2527
2528 av_clear (GvAV (PL_defgv));
2529 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2530 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2531
2532 coro->prio = 0;
2533
2534 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2535 api_trace (aTHX_ coro_current, 0);
2536
2537 av_push (av_async_pool, newSVsv (coro_current));
2538}
2539
2540#if 0
2541
2542void
2543_generator_call (...)
2544 PROTOTYPE: @
2545 PPCODE:
2546 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2547 xxxx
2548 abort ();
2549
1175SV * 2550SV *
1176_aio_get_state () 2551gensub (SV *sub, ...)
1177 CODE: 2552 PROTOTYPE: &;@
2553 CODE:
1178{ 2554{
1179 struct { 2555 struct coro *coro;
1180 int errorno; 2556 MAGIC *mg;
1181 int laststype; 2557 CV *xcv;
1182 int laststatval; 2558 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1183 Stat_t statcache; 2559 int i;
1184 } data;
1185 2560
1186 data.errorno = errno; 2561 CvGV (ncv) = CvGV (cv);
1187 data.laststype = PL_laststype; 2562 CvFILE (ncv) = CvFILE (cv);
1188 data.laststatval = PL_laststatval;
1189 data.statcache = PL_statcache;
1190 2563
1191 RETVAL = newSVpvn ((char *)&data, sizeof data); 2564 Newz (0, coro, 1, struct coro);
2565 coro->args = newAV ();
2566 coro->flags = CF_NEW;
2567
2568 av_extend (coro->args, items - 1);
2569 for (i = 1; i < items; i++)
2570 av_push (coro->args, newSVsv (ST (i)));
2571
2572 CvISXSUB_on (ncv);
2573 CvXSUBANY (ncv).any_ptr = (void *)coro;
2574
2575 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2576
2577 CvXSUB (ncv) = CvXSUB (xcv);
2578 CvANON_on (ncv);
2579
2580 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2581 RETVAL = newRV_noinc ((SV *)ncv);
1192} 2582}
1193 OUTPUT: 2583 OUTPUT:
1194 RETVAL 2584 RETVAL
1195 2585
2586#endif
2587
2588
2589MODULE = Coro::State PACKAGE = Coro::AIO
2590
1196void 2591void
1197_aio_set_state (char *data_) 2592_get_state (SV *self)
1198 PROTOTYPE: $ 2593 PROTOTYPE: $
2594 PPCODE:
2595{
2596 AV *defav = GvAV (PL_defgv);
2597 AV *av = newAV ();
2598 int i;
2599 SV *data_sv = newSV (sizeof (struct io_state));
2600 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2601 SvCUR_set (data_sv, sizeof (struct io_state));
2602 SvPOK_only (data_sv);
2603
2604 data->errorno = errno;
2605 data->laststype = PL_laststype;
2606 data->laststatval = PL_laststatval;
2607 data->statcache = PL_statcache;
2608
2609 av_extend (av, AvFILLp (defav) + 1 + 1);
2610
2611 for (i = 0; i <= AvFILLp (defav); ++i)
2612 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2613
2614 av_push (av, data_sv);
2615
2616 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2617
2618 api_ready (aTHX_ self);
2619}
2620
2621void
2622_set_state (SV *state)
2623 PROTOTYPE: $
2624 PPCODE:
2625{
2626 AV *av = (AV *)SvRV (state);
2627 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2628 int i;
2629
2630 errno = data->errorno;
2631 PL_laststype = data->laststype;
2632 PL_laststatval = data->laststatval;
2633 PL_statcache = data->statcache;
2634
2635 EXTEND (SP, AvFILLp (av));
2636 for (i = 0; i < AvFILLp (av); ++i)
2637 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2638}
2639
2640
2641MODULE = Coro::State PACKAGE = Coro::AnyEvent
2642
2643BOOT:
2644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2645
2646SV *
2647_schedule (...)
1199 CODE: 2648 CODE:
1200{ 2649{
1201 struct { 2650 static int incede;
2651
2652 api_cede_notself (aTHX);
2653
2654 ++incede;
2655 while (coro_nready >= incede && api_cede (aTHX))
2656 ;
2657
2658 sv_setsv (sv_activity, &PL_sv_undef);
2659 if (coro_nready >= incede)
2660 {
2661 PUSHMARK (SP);
2662 PUTBACK;
2663 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2664 SPAGAIN;
2665 }
2666
2667 --incede;
2668}
2669
2670
2671MODULE = Coro::State PACKAGE = PerlIO::cede
2672
2673BOOT:
2674 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2675
2676MODULE = Coro::State PACKAGE = Coro::Semaphore
2677
2678SV *
2679new (SV *klass, SV *count_ = 0)
2680 CODE:
2681{
2682 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2683 AV *av = newAV ();
2684 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2685 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2686}
2687 OUTPUT:
2688 RETVAL
2689
2690SV *
2691count (SV *self)
2692 CODE:
2693 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2694 OUTPUT:
2695 RETVAL
2696
2697void
2698up (SV *self, int adjust = 1)
2699 ALIAS:
2700 adjust = 1
2701 CODE:
2702{
2703 AV *av = (AV *)SvRV (self);
2704 SV *count_sv = AvARRAY (av)[0];
2705 IV count = SvIVX (count_sv);
2706
2707 count += ix ? adjust : 1;
2708 SvIVX (count_sv) = count;
2709
2710 /* now wake up as many waiters as possible */
2711 while (count > 0 && AvFILLp (av) >= count)
2712 {
2713 SV *cb;
2714
2715 /* swap first two elements so we can shift a waiter */
2716 AvARRAY (av)[0] = AvARRAY (av)[1];
2717 AvARRAY (av)[1] = count_sv;
2718 cb = av_shift (av);
2719
2720 if (SvOBJECT (cb))
2721 api_ready (cb);
2722 else
2723 croak ("callbacks not yet supported");
2724
2725 SvREFCNT_dec (cb);
2726 }
2727}
2728
2729void
2730down (SV *self)
2731 CODE:
2732 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), items);
2733
2734void
2735try (SV *self)
2736 PPCODE:
2737{
2738 AV *av = (AV *)SvRV (self);
2739 SV *count_sv = AvARRAY (av)[0];
2740 IV count = SvIVX (count_sv);
2741
2742 if (count > 0)
2743 {
2744 --count;
2745 SvIVX (count_sv) = count;
2746 XSRETURN_YES;
2747 }
2748 else
2749 XSRETURN_NO;
2750}
2751
2752void
2753waiters (SV *self)
2754 CODE:
2755{
2756 AV *av = (AV *)SvRV (self);
2757
2758 if (GIMME_V == G_SCALAR)
2759 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2760 else
2761 {
1202 int errorno; 2762 int i;
1203 int laststype; 2763 EXTEND (SP, AvFILLp (av) + 1 - 1);
1204 int laststatval; 2764 for (i = 1; i <= AvFILLp (av); ++i)
1205 Stat_t statcache; 2765 PUSHs (newSVsv (AvARRAY (av)[i]));
1206 } *data = (void *)data_; 2766 }
1207
1208 errno = data->errorno;
1209 PL_laststype = data->laststype;
1210 PL_laststatval = data->laststatval;
1211 PL_statcache = data->statcache;
1212} 2767}
2768

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