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Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.281 by root, Sun Nov 16 10:12:38 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# if CORO_PTHREAD
148static void *coro_thx;
51# endif 149# 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 150#endif
60#endif
61 151
62#define SUB_INIT "Coro::State::initialize" 152/* helper storage struct for Coro::AIO */
153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
63 161
64/* The next macro should declare a variable stacklevel that contains and approximation 162static double (*nvtime)(); /* so why doesn't it take void? */
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
68 163
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
70 165static size_t cctx_stacksize = CORO_STACKSIZE;
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
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
88 172
89/* this is actually not just the c stack but also c registers etc... */ 173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
186
187static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle;
189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
199/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 200typedef struct coro_cctx
201{
91 struct coro_stack *next; 202 struct coro_cctx *next;
92 203
93 void *idle_sp; 204 /* the stack */
94 void *sptr; 205 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
96 207
97 /* cpu state */ 208 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env;
98 coro_context cctx; 212 coro_context cctx;
99} coro_stack;
100 213
101static coro_stack *main_stack; 214 U32 gen;
215#if CORO_USE_VALGRIND
216 int valgrind_id;
217#endif
218 unsigned char flags;
219} coro_cctx;
102 220
221enum {
222 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
226};
227
228/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct
230{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
103struct coro { 243struct coro {
104 /* optionally saved, might be zero */ 244 /* the C coroutine allocated to this perl coroutine, if any */
105 AV *defav; 245 coro_cctx *cctx;
106 SV *defsv;
107 SV *errsv;
108
109 /* saved global state not related to stacks */
110 U8 dowarn;
111 I32 in_eval;
112 246
113 /* the c stack, if any */ 247 /* process data */
114 coro_stack *stack; 248 struct CoroSLF slf_frame; /* saved slf frame */
115
116 /* the stacks and related info (callchain etc..) */
117 PERL_SI *curstackinfo;
118 AV *curstack;
119 AV *mainstack; 249 AV *mainstack;
120 SV **stack_sp; 250 perl_slots *slot; /* basically the saved sp */
121 OP *op; 251
122 SV **curpad; 252 AV *args; /* data associated with this coroutine (initial args) */
123 AV *comppad; 253 int refcnt; /* coroutines are refcounted, yes */
124 CV *compcv; 254 int flags; /* CF_ flags */
125 SV **stack_base; 255 HV *hv; /* the perl hash associated with this coro, if any */
126 SV **stack_max; 256 void (*on_destroy)(pTHX_ struct coro *coro);
127 SV **tmps_stack; 257
128 I32 tmps_floor; 258 /* statistics */
129 I32 tmps_ix; 259 int usecount; /* number of transfers to this coro */
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;
146 260
147 /* coro process data */ 261 /* coro process data */
148 int prio; 262 int prio;
263 SV *throw; /* exception to be thrown */
149 264
150 /* data associated with this coroutine (initial args) */ 265 /* async_pool */
151 AV *args; 266 SV *saved_deffh;
152 int refcnt; 267
268 /* linked list */
269 struct coro *next, *prev;
153}; 270};
154 271
155typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
157 274
275static struct CoroSLF slf_frame; /* the current slf frame */
276
277/** Coro ********************************************************************/
278
279#define PRIO_MAX 3
280#define PRIO_HIGH 1
281#define PRIO_NORMAL 0
282#define PRIO_LOW -1
283#define PRIO_IDLE -3
284#define PRIO_MIN -4
285
286/* for Coro.pm */
287static SV *coro_current;
288static SV *coro_readyhook;
289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** lowlevel stuff **********************************************************/
294
295static SV *
296coro_get_sv (pTHX_ const char *name, int create)
297{
298#if PERL_VERSION_ATLEAST (5,10,0)
299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
300 get_sv (name, create);
301#endif
302 return get_sv (name, create);
303}
304
305static AV *
306coro_get_av (pTHX_ const char *name, int create)
307{
308#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create);
311#endif
312 return get_av (name, create);
313}
314
315static HV *
316coro_get_hv (pTHX_ const char *name, int create)
317{
318#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create);
321#endif
322 return get_hv (name, create);
323}
324
158static AV * 325static AV *
159coro_clone_padlist (pTHX_ CV *cv) 326coro_clone_padlist (pTHX_ CV *cv)
160{ 327{
161 AV *padlist = CvPADLIST (cv); 328 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 329 AV *newpadlist, *newpad;
163 330
164 newpadlist = newAV (); 331 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 332 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 333#if PERL_VERSION_ATLEAST (5,10,0)
334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
335#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 337#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 339 --AvFILLp (padlist);
173 340
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
176 343
177 return newpadlist; 344 return newpadlist;
178} 345}
179 346
… …
209 376
210 /* casting is fun. */ 377 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 379 free_padlist (aTHX_ padlist);
213 380
214 SvREFCNT_dec (av); 381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 382
216 return 0; 383 return 0;
217} 384}
218 385
219#define PERL_MAGIC_coro PERL_MAGIC_ext 386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 388
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 389static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0,
391 coro_cv_free
392};
393
394#define CORO_MAGIC(sv, type) \
395 expect_true (SvMAGIC (sv)) \
396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
397 ? SvMAGIC (sv) \
398 : mg_find (sv, type) \
399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
406{
407 HV *stash;
408 MAGIC *mg;
409
410 if (SvROK (coro))
411 coro = SvRV (coro);
412
413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
414 croak ("Coro::State object required");
415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
222 442
223/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
224static void 444static void
225get_padlist (pTHX_ CV *cv) 445get_padlist (pTHX_ CV *cv)
226{ 446{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
228 449
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 452 else
232 { 453 {
233#if 0 454#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 457 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 458 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 459 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 460 SvREFCNT_dec (cp);
239#else 461#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 465}
244 466
245static void 467static void
246put_padlist (pTHX_ CV *cv) 468put_padlist (pTHX_ CV *cv)
247{ 469{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
249 472
250 if (!mg) 473 if (expect_false (!mg))
251 { 474 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 }
257 475
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 476 av = (AV *)mg->mg_obj;
259}
260 477
261#define SB do { 478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 479 av_extend (av, AvMAX (av) + 1);
263 480
264#define LOAD(state) load_state(aTHX_ (state)); 481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 482}
266 483
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 484/** load & save, init *******************************************************/
268 485
269static void 486static void
270load_state(pTHX_ Coro__State c) 487load_perl (pTHX_ Coro__State c)
271{ 488{
272 PL_dowarn = c->dowarn; 489 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 490 c->slot = 0;
274 491
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 492 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;
306 493
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 494 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 495 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
310 502
311 { 503 {
312 dSP; 504 dSP;
505
313 CV *cv; 506 CV *cv;
314 507
315 /* now do the ugly restore mess */ 508 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 509 while (expect_true (cv = (CV *)POPs))
317 { 510 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 511 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 512 CvDEPTH (cv) = PTR2IV (POPs);
324 } 513 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 514 }
328 515
329 PUTBACK; 516 PUTBACK;
330 } 517 }
331}
332 518
519 slf_frame = c->slf_frame;
520}
521
333static void 522static void
334save_state(pTHX_ Coro__State c, int flags) 523save_perl (pTHX_ Coro__State c)
335{ 524{
525 c->slf_frame = slf_frame;
526
336 { 527 {
337 dSP; 528 dSP;
338 I32 cxix = cxstack_ix; 529 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 530 PERL_CONTEXT *ccstk = cxstack;
340 PERL_SI *top_si = PL_curstackinfo; 531 PERL_SI *top_si = PL_curstackinfo;
… …
342 /* 533 /*
343 * the worst thing you can imagine happens first - we have to save 534 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :( 535 * (and reinitialize) all cv's in the whole callchain :(
345 */ 536 */
346 537
347 PUSHs (Nullsv); 538 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 539 /* this loop was inspired by pp_caller */
349 for (;;) 540 for (;;)
350 { 541 {
351 while (cxix >= 0) 542 while (expect_true (cxix >= 0))
352 { 543 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 544 PERL_CONTEXT *cx = &ccstk[cxix--];
354 545
355 if (CxTYPE(cx) == CXt_SUB) 546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 547 {
357 CV *cv = cx->blk_sub.cv; 548 CV *cv = cx->blk_sub.cv;
549
358 if (CvDEPTH(cv)) 550 if (expect_true (CvDEPTH (cv)))
359 { 551 {
360 EXTEND (SP, CvDEPTH(cv)*2); 552 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)); 553 PUSHs ((SV *)CvPADLIST (cv));
554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 555 PUSHs ((SV *)cv);
371 556
557 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 558 get_padlist (aTHX_ cv);
373 } 559 }
374 } 560 }
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 } 561 }
384 562
385 if (top_si->si_type == PERLSI_MAIN) 563 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 564 break;
387 565
388 top_si = top_si->si_prev; 566 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 567 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 568 cxix = top_si->si_cxix;
391 } 569 }
392 570
393 PUTBACK; 571 PUTBACK;
394 } 572 }
395 573
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 574 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 575 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 576 if (SLOT_COUNT >= 1) CXINC;
577 if (SLOT_COUNT >= 2) CXINC;
578 if (SLOT_COUNT >= 3) CXINC;
579 {
580 int i;
581 for (i = 3; i < SLOT_COUNT; ++i)
582 CXINC;
583 }
584 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 585
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; 586 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 587
407 c->op = PL_op; 588 {
408 c->curpad = PL_curpad; 589 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 590
410 c->compcv = PL_compcv; 591 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 592 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 593 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 594 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 595
415 c->tmps_ix = PL_tmps_ix; 596 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 597 # include "state.h"
417 c->markstack = PL_markstack; 598 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 599 }
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} 600}
435 601
436/* 602/*
437 * allocate various perl stacks. This is an exact copy 603 * allocate various perl stacks. This is almost an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 604 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 605 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 606 * not usually need a lot of stackspace.
441 */ 607 */
608#if CORO_PREFER_PERL_FUNCTIONS
609# define coro_init_stacks init_stacks
610#else
442static void 611static void
443coro_init_stacks (pTHX) 612coro_init_stacks (pTHX)
444{ 613{
445 LOCK; 614 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; 615 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 616 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 618
452 PL_stack_base = AvARRAY(PL_curstack); 619 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 620 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 622
456 New(50,PL_tmps_stack,96,SV*); 623 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 624 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 625 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 626 PL_tmps_max = 32;
460 627
461 New(54,PL_markstack,16,I32); 628 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 629 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 630 PL_markstack_max = PL_markstack + 16;
464 631
465#ifdef SET_MARK_OFFSET 632#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 633 SET_MARK_OFFSET;
467#endif 634#endif
468 635
469 New(54,PL_scopestack,16,I32); 636 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 637 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 638 PL_scopestack_max = 8;
472 639
473 New(54,PL_savestack,96,ANY); 640 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 641 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 642 PL_savestack_max = 24;
476 643
477#if PERL_VERSION < 9 644#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 645 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 646 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 647 PL_retstack_max = 4;
481#endif 648#endif
482
483 UNLOCK;
484} 649}
650#endif
485 651
486/* 652/*
487 * destroy the stacks, the callchain etc... 653 * destroy the stacks, the callchain etc...
488 */ 654 */
489static void 655static void
490destroy_stacks(pTHX) 656coro_destruct_stacks (pTHX)
491{ 657{
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) 658 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 659 PL_curstackinfo = PL_curstackinfo->si_next;
505 660
506 while (PL_curstackinfo) 661 while (PL_curstackinfo)
507 { 662 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 663 PERL_SI *p = PL_curstackinfo->si_prev;
509 664
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 665 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 666 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 667
522 Safefree (PL_curstackinfo->si_cxstack); 668 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 669 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 670 PL_curstackinfo = p;
525 } 671 }
526 672
527 Safefree (PL_tmps_stack); 673 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 674 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 675 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 676 Safefree (PL_savestack);
531#if PERL_VERSION < 9 677#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 678 Safefree (PL_retstack);
533#endif 679#endif
534} 680}
535 681
682static size_t
683coro_rss (pTHX_ struct coro *coro)
684{
685 size_t rss = sizeof (*coro);
686
687 if (coro->mainstack)
688 {
689 perl_slots tmp_slot;
690 perl_slots *slot;
691
692 if (coro->flags & CF_RUNNING)
693 {
694 slot = &tmp_slot;
695
696 #define VAR(name,type) slot->name = PL_ ## name;
697 # include "state.h"
698 #undef VAR
699 }
700 else
701 slot = coro->slot;
702
703 if (slot)
704 {
705 rss += sizeof (slot->curstackinfo);
706 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
708 rss += slot->tmps_max * sizeof (SV *);
709 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
710 rss += slot->scopestack_max * sizeof (I32);
711 rss += slot->savestack_max * sizeof (ANY);
712
713#if !PERL_VERSION_ATLEAST (5,10,0)
714 rss += slot->retstack_max * sizeof (OP *);
715#endif
716 }
717 }
718
719 return rss;
720}
721
722/** coroutine stack handling ************************************************/
723
724static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
727
728/* apparently < 5.8.8 */
729#ifndef MgPV_nolen_const
730#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
731 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
732 (const char*)(mg)->mg_ptr)
733#endif
734
735/*
736 * This overrides the default magic get method of %SIG elements.
737 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
738 * and instead of tryign to save and restore the hash elements, we just provide
739 * readback here.
740 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
741 * not expecting this to actually change the hook. This is a potential problem
742 * when a schedule happens then, but we ignore this.
743 */
536static void 744static int
537setup_coro (struct coro *coro) 745coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
746{
747 const char *s = MgPV_nolen_const (mg);
748
749 if (*s == '_')
750 {
751 SV **svp = 0;
752
753 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
754 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
755
756 if (svp)
757 {
758 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
759 return 0;
760 }
761 }
762
763 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
764}
765
766static int
767coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 SV *old = *svp;
781 *svp = 0;
782 SvREFCNT_dec (old);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = newSVsv (sv);
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
812}
813
814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
828coro_setup (pTHX_ struct coro *coro)
538{ 829{
539 /* 830 /*
540 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
541 */ 832 */
542 dTHX; 833 coro_init_stacks (aTHX);
834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880}
881
882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
903 SvREFCNT_dec (GvAV (PL_defgv));
904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
914
915 coro_destruct_stacks (aTHX);
916}
917
918INLINE void
919free_coro_mortal (pTHX)
920{
921 if (expect_true (coro_mortal))
922 {
923 SvREFCNT_dec (coro_mortal);
924 coro_mortal = 0;
925 }
926}
927
928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 {
938 PERL_ASYNC_CHECK ();
939
940 if (cctx->flags & CC_TRACE_ALL)
941 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top;
946 AV *av = newAV (); /* return values */
947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
986 {
987 SV **cb;
988
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
990 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 {
995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
1021 }
1022
1023 if (cctx->flags & CC_TRACE_LINE)
1024 {
1025 dSP;
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PL_runops = RUNOPS_DEFAULT;
1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043 }
1044 }
1045 }
1046 }
1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
1063static void NOINLINE
1064cctx_prepare (pTHX_ coro_cctx *cctx)
1065{
543 dSP; 1066 dSP;
544 UNOP myop; 1067 UNOP myop;
545 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546 1068
547 coro_init_stacks (aTHX); 1069 PL_top_env = &PL_start_env;
548 /*PL_curcop = 0;*/
549 /*PL_in_eval = PL_in_eval;*/ /* inherit */
550 SvREFCNT_dec (GvAV (PL_defgv));
551 GvAV (PL_defgv) = coro->args; coro->args = 0;
552 1070
553 SPAGAIN; 1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
554 1073
555 Zero (&myop, 1, UNOP); 1074 Zero (&myop, 1, UNOP);
556 myop.op_next = Nullop; 1075 myop.op_next = PL_op;
557 myop.op_flags = OPf_WANT_VOID; 1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558 1077
1078 PUSHMARK (SP);
1079 EXTEND (SP, 2);
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1082 PUTBACK;
559 PL_op = (OP *)&myop; 1083 PL_op = (OP *)&myop;
560
561 PUSHMARK(SP);
562 XPUSHs (sub_init);
563 PUTBACK;
564 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565 SPAGAIN; 1085 SPAGAIN;
566
567 ENTER; /* necessary e.g. for dounwind */
568} 1086}
569 1087
570static void 1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
571transfer_tail () 1090transfer_tail (pTHX)
572{ 1091{
573 if (coro_mortal) 1092 struct coro *next = (struct coro *)transfer_next;
574 { 1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
575 SvREFCNT_dec (coro_mortal); 1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
576 coro_mortal = 0; 1095
1096 free_coro_mortal (aTHX);
1097
1098 if (expect_false (next->throw))
577 } 1099 {
1100 SV *exception = sv_2mortal (next->throw);
578 1101
579 UNLOCK; 1102 next->throw = 0;
1103 sv_setsv (ERRSV, exception);
1104 croak (0);
1105 }
580} 1106}
581 1107
582static void 1108/*
583coro_run (void *arg)
584{
585 /*
586 * this is a _very_ stripped down perl interpreter ;) 1109 * this is a _very_ stripped down perl interpreter ;)
587 */ 1110 */
1111static void
1112cctx_run (void *arg)
1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
588 dTHX; 1120 dTHX;
589 1121
1122 /* normally we would need to skip the entersub here */
1123 /* not doing so will re-execute it, which is exactly what we want */
1124 /* PL_nop = PL_nop->op_next */
1125
1126 /* inject a fake subroutine call to cctx_init */
1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
1128
1129 /* cctx_run is the alternative tail of transfer() */
1130 /* TODO: throwing an exception here might be deadly, VERIFY */
590 transfer_tail (); 1131 transfer_tail (aTHX);
591 1132
592 PL_top_env = &PL_start_env;
593 PL_restartop = PL_op->op_next;
594 /* somebody will hit me for both perl_run and PL_restart_top */ 1133 /* somebody or something will hit me for both perl_run and PL_restartop */
595 perl_run (aTHX_ PERL_GET_CONTEXT); 1134 PL_restartop = PL_op;
1135 perl_run (PL_curinterp);
596 1136
597 abort (); 1137 /*
1138 * If perl-run returns we assume exit() was being called or the coro
1139 * fell off the end, which seems to be the only valid (non-bug)
1140 * reason for perl_run to return. We try to exit by jumping to the
1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1142 * coroutine as Coro has no such concept
1143 */
1144 PL_top_env = main_top_env;
1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
598} 1147}
599 1148
600static coro_stack * 1149static coro_cctx *
601stack_new () 1150cctx_new ()
602{ 1151{
603 coro_stack *stack; 1152 coro_cctx *cctx;
604 1153
1154 ++cctx_count;
605 New (0, stack, 1, coro_stack); 1155 New (0, cctx, 1, coro_cctx);
1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1181 void *stack_start;
1182 size_t stack_size;
606 1183
607#if HAVE_MMAP 1184#if HAVE_MMAP
608 1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 1186 /* mmap supposedly does allocate-on-write for us */
610 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611 1188
612 if (stack->sptr == (void *)-1) 1189 if (cctx->sptr != (void *)-1)
1190 {
1191 #if CORO_STACKGUARD
1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1193 #endif
1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1196 cctx->flags |= CC_MAPPED;
613 { 1197 }
614 fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n"); 1198 else
1199#endif
1200 {
1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1202 New (0, cctx->sptr, cctx_stacksize, long);
1203
1204 if (!cctx->sptr)
1205 {
1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
615 _exit (EXIT_FAILURE); 1207 _exit (EXIT_FAILURE);
616 } 1208 }
617 1209
618 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1210 stack_start = cctx->sptr;
619 1211 stack_size = cctx->ssize;
620#else
621
622 stack->ssize = STACKSIZE * (long)sizeof (long);
623 New (0, stack->sptr, STACKSIZE, long);
624
625 if (!stack->sptr)
626 { 1212 }
627 fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628 _exit (EXIT_FAILURE);
629 }
630 1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
631#endif 1216 #endif
632 1217
633 coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize); 1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
634 1219
635 return stack; 1220 return cctx;
636} 1221}
637 1222
638static void 1223static void
639stack_free (coro_stack *stack) 1224cctx_destroy (coro_cctx *cctx)
640{ 1225{
641 if (!stack || stack == main_stack) 1226 if (!cctx)
642 return; 1227 return;
643 1228
1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
1231
1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1237 #endif
1238
644#if HAVE_MMAP 1239#if HAVE_MMAP
645 munmap (stack->sptr, stack->ssize); 1240 if (cctx->flags & CC_MAPPED)
646#else 1241 munmap (cctx->sptr, cctx->ssize);
1242 else
1243#endif
647 Safefree (stack->sptr); 1244 Safefree (cctx->sptr);
648#endif 1245 }
649 1246
650 Safefree (stack); 1247 Safefree (cctx);
651} 1248}
652 1249
653static coro_stack *stack_first; 1250/* wether this cctx should be destructed */
1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
654 1252
655static void 1253static coro_cctx *
656stack_get (struct coro *coro) 1254cctx_get (pTHX)
657{ 1255{
658 if (stack_first) 1256 while (expect_true (cctx_first))
1257 {
1258 coro_cctx *cctx = cctx_first;
1259 cctx_first = cctx->next;
1260 --cctx_idle;
1261
1262 if (expect_true (!CCTX_EXPIRED (cctx)))
1263 return cctx;
1264
1265 cctx_destroy (cctx);
659 { 1266 }
660 coro->stack = stack_first; 1267
1268 return cctx_new_run ();
1269}
1270
1271static void
1272cctx_put (coro_cctx *cctx)
1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
1276 /* free another cctx if overlimit */
1277 if (expect_false (cctx_idle >= cctx_max_idle))
1278 {
1279 coro_cctx *first = cctx_first;
661 stack_first = stack_first->next; 1280 cctx_first = first->next;
1281 --cctx_idle;
1282
1283 cctx_destroy (first);
1284 }
1285
1286 ++cctx_idle;
1287 cctx->next = cctx_first;
1288 cctx_first = cctx;
1289}
1290
1291/** coroutine switching *****************************************************/
1292
1293static void
1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1295{
1296 if (expect_true (prev != next))
662 } 1297 {
663 else 1298 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
664 coro->stack = stack_new (); 1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
665}
666 1300
667static void 1301 if (expect_false (next->flags & CF_RUNNING))
668stack_put (coro_stack *stack) 1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
669{
670 stack->next = stack_first;
671 stack_first = stack;
672}
673 1303
674/* never call directly, always through the coro_state_transfer global variable */ 1304 if (expect_false (next->flags & CF_DESTROYED))
675static void 1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1306
1307#if !PERL_VERSION_ATLEAST (5,10,0)
1308 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1310#endif
1311 }
1312}
1313
1314/* always use the TRANSFER macro */
1315static void NOINLINE
676transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
677{ 1317{
678 dSTACKLEVEL; 1318 dSTACKLEVEL;
679 1319
680 /* sometimes transfer is only called to set idle_sp */ 1320 /* sometimes transfer is only called to set idle_sp */
681 if (!prev->stack->idle_sp) 1321 if (expect_false (!next))
682 prev->stack->idle_sp = stacklevel; 1322 {
683 1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
684 LOCK; 1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685
686 if (prev != next)
687 { 1325 }
688 coro_stack *prev_stack = prev->stack; 1326 else if (expect_true (prev != next))
1327 {
1328 coro_cctx *prev__cctx;
689 1329
690 /* possibly "free" the stack */ 1330 if (expect_false (prev->flags & CF_NEW))
691 if (prev_stack->idle_sp == stacklevel)
692 { 1331 {
693 stack_put (prev_stack); 1332 /* create a new empty/source context */
694 prev->stack = 0; 1333 prev->cctx = cctx_new_empty ();
1334 prev->flags &= ~CF_NEW;
1335 prev->flags |= CF_RUNNING;
695 } 1336 }
696 1337
697 if (next->mainstack) 1338 prev->flags &= ~CF_RUNNING;
1339 next->flags |= CF_RUNNING;
1340
1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
1343
1344 if (expect_false (next->flags & CF_NEW))
698 { 1345 {
699 /* coroutine already started */ 1346 /* need to start coroutine */
700 SAVE (prev, flags); 1347 next->flags &= ~CF_NEW;
701 LOAD (next); 1348 /* setup coroutine call */
1349 coro_setup (aTHX_ next);
702 } 1350 }
703 else 1351 else
1352 load_perl (aTHX_ next);
1353
1354 prev__cctx = prev->cctx;
1355
1356 /* possibly untie and reuse the cctx */
1357 if (expect_true (
1358 prev__cctx->idle_sp == (void *)stacklevel
1359 && !(prev__cctx->flags & CC_TRACE)
1360 && !force_cctx
1361 ))
704 { 1362 {
705 /* need to start coroutine */ 1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
706 /* first get rid of the old state */ 1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
707 SAVE (prev, -1); 1365
708 /* setup coroutine call */ 1366 prev->cctx = 0;
709 setup_coro (next); 1367
710 /* need to change stack from main_stack to real one */ 1368 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
711 next->stack = 0; 1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1370 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1371 if (!next->cctx)
1372 next->cctx = cctx_get (aTHX);
1373
1374 cctx_put (prev__cctx);
712 } 1375 }
713 1376
714 if (!next->stack) 1377 ++next->usecount;
715 stack_get (next);
716 1378
717 if (prev_stack != next->stack) 1379 if (expect_true (!next->cctx))
1380 next->cctx = cctx_get (aTHX);
1381
1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1384
1385 if (expect_false (prev__cctx != next->cctx))
1386 {
1387 prev__cctx->top_env = PL_top_env;
1388 PL_top_env = next->cctx->top_env;
718 coro_transfer (&prev_stack->cctx, &next->stack->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
719 } 1390 }
720 1391
721 transfer_tail (); 1392 transfer_tail (aTHX);
1393 }
722} 1394}
723 1395
724/* use this function pointer to call the above function */ 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
725/* this is done to increase chances of the compiler not inlining the call */ 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
726void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
727 1398
1399/** high level stuff ********************************************************/
1400
728static void 1401static int
729coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
730{ 1403{
731 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
732 return; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
733 1420
734 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
735 { 1422 {
736 struct coro temp; 1423 struct coro temp;
737 1424
738 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
739 LOAD (aTHX_ coro); 1428 load_perl (aTHX_ coro);
740 1429
741 destroy_stacks (aTHX); 1430 coro_destruct (aTHX_ coro);
742 1431
743 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
744 1433
745 coro->mainstack = 0; 1434 coro->slot = 0;
746 } 1435 }
747 1436
748 stack_free (coro->stack); 1437 cctx_destroy (coro->cctx);
749 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
750 Safefree (coro); 1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
751} 1445}
752 1446
753static int 1447static int
754coro_state_clear (SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755{ 1449{
756 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
757 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
758 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
759 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
760 1460
761 return 0; 1461 return 0;
762} 1462}
763 1463
764static int 1464static int
765coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766{ 1466{
767 struct coro *coro = (struct coro *)mg->mg_ptr; 1467 struct coro *coro = (struct coro *)mg->mg_ptr;
768 1468
769 ++coro->refcnt; 1469 ++coro->refcnt;
770 1470
771 return 0; 1471 return 0;
772} 1472}
773 1473
774static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
775 1484
776static struct coro *
777SvSTATE (SV *coro)
778{
779 HV *stash;
780 MAGIC *mg;
781
782 if (SvROK (coro))
783 coro = SvRV (coro);
784
785 stash = SvSTASH (coro);
786 if (stash != coro_stash && stash != coro_state_stash)
787 {
788 /* very slow, but rare, check */
789 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
790 croak ("Coro::State object required");
791 }
792
793 mg = SvMAGIC (coro);
794 assert (mg->mg_type == PERL_MAGIC_ext);
795 return (struct coro *)mg->mg_ptr;
796}
797
798static void 1485static void
1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1487{
1488 ta->prev = SvSTATE (prev_sv);
1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1491}
1492
1493static void
799api_transfer (pTHX_ SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
800{ 1495{
801 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1496 struct coro_transfer_args ta;
1497
1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1499 TRANSFER (ta, 1);
802} 1500}
803 1501
804/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
805 1503
806#define PRIO_MAX 3 1504INLINE void
807#define PRIO_HIGH 1 1505coro_enq (pTHX_ struct coro *coro)
808#define PRIO_NORMAL 0 1506{
809#define PRIO_LOW -1 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
810#define PRIO_IDLE -3 1508}
811#define PRIO_MIN -4
812 1509
813/* for Coro.pm */ 1510INLINE SV *
814static GV *coro_current, *coro_idle; 1511coro_deq (pTHX)
815static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816static int coro_nready;
817
818static void
819coro_enq (pTHX_ SV *sv)
820{ 1512{
821 int prio; 1513 int prio;
822 1514
823 if (SvTYPE (sv) != SVt_PVHV) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
824 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
825 1518
826 prio = SvSTATE (sv)->prio; 1519 return 0;
1520}
827 1521
828 av_push (coro_ready [prio - PRIO_MIN], sv); 1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
829 coro_nready++; 1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_DISCARD);
1555 SPAGAIN;
1556
1557 FREETMPS;
1558 LEAVE;
1559 }
1560
1561 if (xs_hook)
1562 xs_hook ();
1563
1564 return 1;
1565}
1566
1567static int
1568api_is_ready (pTHX_ SV *coro_sv)
1569{
1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1571}
1572
1573INLINE void
1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1575{
1576 SV *prev_sv, *next_sv;
1577
1578 for (;;)
1579 {
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586
1587 ENTER;
1588 SAVETMPS;
1589
1590 PUSHMARK (SP);
1591 PUTBACK;
1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1594
1595 FREETMPS;
1596 LEAVE;
1597 continue;
1598 }
1599
1600 ta->next = SvSTATE_hv (next_sv);
1601
1602 /* cannot transfer to destroyed coros, skip and look for next */
1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1604 {
1605 SvREFCNT_dec (next_sv);
1606 /* coro_nready has already been taken care of by destroy */
1607 continue;
1608 }
1609
1610 --coro_nready;
1611 break;
1612 }
1613
1614 /* free this only after the transfer */
1615 prev_sv = SvRV (coro_current);
1616 ta->prev = SvSTATE_hv (prev_sv);
1617 TRANSFER_CHECK (*ta);
1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1619 ta->next->flags &= ~CF_READY;
1620 SvRV_set (coro_current, next_sv);
1621
1622 free_coro_mortal (aTHX);
1623 coro_mortal = prev_sv;
1624}
1625
1626INLINE void
1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1628{
1629 api_ready (aTHX_ coro_current);
1630 prepare_schedule (aTHX_ ta);
1631}
1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
1648api_schedule (pTHX)
1649{
1650 struct coro_transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int
1657api_cede (pTHX)
1658{
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
1666 return 1;
1667 }
1668 else
1669 return 0;
1670}
1671
1672static int
1673api_cede_notself (pTHX)
1674{
1675 if (coro_nready)
1676 {
1677 struct coro_transfer_args ta;
1678
1679 prepare_cede_notself (aTHX_ &ta);
1680 TRANSFER (ta, 1);
1681 return 1;
1682 }
1683 else
1684 return 0;
1685}
1686
1687static void
1688api_trace (pTHX_ SV *coro_sv, int flags)
1689{
1690 struct coro *coro = SvSTATE (coro_sv);
1691
1692 if (flags & CC_TRACE)
1693 {
1694 if (!coro->cctx)
1695 coro->cctx = cctx_new_run ();
1696 else if (!(coro->cctx->flags & CC_TRACE))
1697 croak ("cannot enable tracing on coroutine with custom stack,");
1698
1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1700 }
1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1702 {
1703 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1704
1705 if (coro->flags & CF_RUNNING)
1706 PL_runops = RUNOPS_DEFAULT;
1707 else
1708 coro->slot->runops = RUNOPS_DEFAULT;
1709 }
1710}
1711
1712/*****************************************************************************/
1713/* PerlIO::cede */
1714
1715typedef struct
1716{
1717 PerlIOBuf base;
1718 NV next, every;
1719} PerlIOCede;
1720
1721static IV
1722PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1723{
1724 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1725
1726 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1727 self->next = nvtime () + self->every;
1728
1729 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
830} 1730}
831 1731
832static SV * 1732static SV *
833coro_deq (pTHX_ int min_prio) 1733PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
834{ 1734{
835 int prio = PRIO_MAX - PRIO_MIN; 1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
836 1736
837 min_prio -= PRIO_MIN; 1737 return newSVnv (self->every);
838 if (min_prio < 0) 1738}
839 min_prio = 0;
840 1739
841 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1740static IV
842 if (AvFILLp (coro_ready [prio]) >= 0) 1741PerlIOCede_flush (pTHX_ PerlIO *f)
1742{
1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1744 double now = nvtime ();
1745
1746 if (now >= self->next)
1747 {
1748 api_cede (aTHX);
1749 self->next = now + self->every;
1750 }
1751
1752 return PerlIOBuf_flush (aTHX_ f);
1753}
1754
1755static PerlIO_funcs PerlIO_cede =
1756{
1757 sizeof(PerlIO_funcs),
1758 "cede",
1759 sizeof(PerlIOCede),
1760 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1761 PerlIOCede_pushed,
1762 PerlIOBuf_popped,
1763 PerlIOBuf_open,
1764 PerlIOBase_binmode,
1765 PerlIOCede_getarg,
1766 PerlIOBase_fileno,
1767 PerlIOBuf_dup,
1768 PerlIOBuf_read,
1769 PerlIOBuf_unread,
1770 PerlIOBuf_write,
1771 PerlIOBuf_seek,
1772 PerlIOBuf_tell,
1773 PerlIOBuf_close,
1774 PerlIOCede_flush,
1775 PerlIOBuf_fill,
1776 PerlIOBase_eof,
1777 PerlIOBase_error,
1778 PerlIOBase_clearerr,
1779 PerlIOBase_setlinebuf,
1780 PerlIOBuf_get_base,
1781 PerlIOBuf_bufsiz,
1782 PerlIOBuf_get_ptr,
1783 PerlIOBuf_get_cnt,
1784 PerlIOBuf_set_ptrcnt,
1785};
1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
843 { 1943 {
844 coro_nready--; 1944 if (sp == bot)
845 return av_shift (coro_ready [prio]); 1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
846 } 1948 }
847 1949
848 return 0;
849}
850
851static void
852api_ready (SV *coro)
853{
854 dTHX;
855
856 if (SvROK (coro))
857 coro = SvRV (coro);
858
859 LOCK;
860 coro_enq (aTHX_ SvREFCNT_inc (coro));
861 UNLOCK;
862}
863
864static void
865api_schedule (void)
866{
867 dTHX;
868
869 SV *prev, *next;
870 SV *current = GvSV (coro_current);
871
872 for (;;)
873 {
874 LOCK;
875
876 next = coro_deq (aTHX_ PRIO_MIN);
877
878 if (next)
879 break;
880
881 UNLOCK;
882
883 {
884 dSP;
885
886 ENTER;
887 SAVETMPS;
888
889 PUSHMARK (SP);
890 PUTBACK; 1950 PUTBACK;
891 call_sv (GvSV (coro_idle), G_DISCARD); 1951 }
892 1952
893 FREETMPS; 1953 return NORMAL;
894 LEAVE; 1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, int adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as possible */
2001 while (count > 0 && AvFILLp (av) >= count)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
895 } 2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
2028static int
2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2030{
2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
2033
2034 if (SvIVX (count_sv) > 0)
896 } 2035 {
897 2036 SvSTATE_current->on_destroy = 0;
898 prev = SvRV (current); 2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
899 SvRV (current) = next; 2038 return 0;
900
901 /* free this only after the transfer */
902 coro_mortal = prev;
903
904 UNLOCK;
905
906 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
907}
908
909static int coro_cede_self;
910
911static void
912api_cede (void)
913{
914 dTHX;
915 SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
916
917 LOCK;
918
919 if (coro_cede_self)
920 {
921 AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
922 av_unshift (runqueue, 1);
923 av_store (runqueue, 0, current);
924 coro_nready++;
925 coro_cede_self = 0;
926 } 2039 }
927 else 2040 else
928 coro_enq (aTHX_ current); 2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
929 2046
930 UNLOCK; 2047 for (i = 1; i <= AvFILLp (av); ++i)
2048 if (AvARRAY (av)[i] == SvRV (coro_current))
2049 return 1;
931 2050
932 api_schedule (); 2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2052 return 1;
2053 }
933} 2054}
934 2055
2056static void
2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 AV *av = (AV *)SvRV (arg [0]);
2060
2061 if (SvIVX (AvARRAY (av)[0]) > 0)
2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 }
2066 else
2067 {
2068 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2069
2070 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2071 frame->prepare = prepare_schedule;
2072
2073 /* to avoid race conditions when a woken-up coro gets terminated */
2074 /* we arrange for a temporary on_destroy that calls adjust (0) */
2075 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2076 }
2077
2078 frame->check = slf_check_semaphore_down;
2079
2080}
2081
2082/*****************************************************************************/
2083
2084#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2085
2086/* create a closure from XS, returns a code reference */
2087/* the arg can be accessed via GENSUB_ARG from the callback */
2088/* the callback must use dXSARGS/XSRETURN */
2089static SV *
2090gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2091{
2092 CV *cv = (CV *)NEWSV (0, 0);
2093
2094 sv_upgrade ((SV *)cv, SVt_PVCV);
2095
2096 CvANON_on (cv);
2097 CvISXSUB_on (cv);
2098 CvXSUB (cv) = xsub;
2099 GENSUB_ARG = arg;
2100
2101 return newRV_noinc ((SV *)cv);
2102}
2103
2104/*****************************************************************************/
2105
935MODULE = Coro::State PACKAGE = Coro::State 2106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936 2107
937PROTOTYPES: DISABLE 2108PROTOTYPES: DISABLE
938 2109
939BOOT: 2110BOOT:
940{ 2111{
941#ifdef USE_ITHREADS 2112#ifdef USE_ITHREADS
942 MUTEX_INIT (&coro_mutex); 2113# if CORO_PTHREAD
2114 coro_thx = PERL_GET_CONTEXT;
2115# endif
943#endif 2116#endif
944 BOOT_PAGESIZE; 2117 BOOT_PAGESIZE;
945 2118
2119 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2120 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2121
2122 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2123 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2124 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2125
2126 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2127 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2128 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2129
946 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2130 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947 2131
948 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2132 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
949 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2133 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
950 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2135 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
951 2136
952 main_mainstack = PL_mainstack; 2137 main_mainstack = PL_mainstack;
2138 main_top_env = PL_top_env;
953 2139
2140 while (main_top_env->je_prev)
2141 main_top_env = main_top_env->je_prev;
2142
2143 {
2144 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2145
2146 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2147 hv_store_ent (PL_custom_op_names, slf,
2148 newSVpv ("coro_slf", 0), 0);
2149
2150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2151 hv_store_ent (PL_custom_op_descs, slf,
2152 newSVpv ("coro schedule like function", 0), 0);
2153 }
2154
954 coroapi.ver = CORO_API_VERSION; 2155 coroapi.ver = CORO_API_VERSION;
2156 coroapi.rev = CORO_API_REVISION;
2157
955 coroapi.transfer = api_transfer; 2158 coroapi.transfer = api_transfer;
956 2159
957 Newz (0, main_stack, 1, coro_stack); 2160 coroapi.sv_state = SvSTATE_;
958 main_stack->idle_sp = (void *)-1; 2161 coroapi.execute_slf = api_execute_slf;
2162 coroapi.prepare_nop = prepare_nop;
2163 coroapi.prepare_schedule = prepare_schedule;
2164 coroapi.prepare_cede = prepare_cede;
2165 coroapi.prepare_cede_notself = prepare_cede_notself;
2166
2167 {
2168 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2169
2170 if (!svp) croak ("Time::HiRes is required");
2171 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2172
2173 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2174 }
959 2175
960 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2176 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961} 2177}
962 2178
963SV * 2179SV *
964new (char *klass, ...) 2180new (char *klass, ...)
965 CODE: 2181 CODE:
966{ 2182{
967 struct coro *coro; 2183 struct coro *coro;
2184 MAGIC *mg;
968 HV *hv; 2185 HV *hv;
969 int i; 2186 int i;
970 2187
971 Newz (0, coro, 1, struct coro); 2188 Newz (0, coro, 1, struct coro);
972 coro->args = newAV (); 2189 coro->args = newAV ();
2190 coro->flags = CF_NEW;
973 2191
2192 if (coro_first) coro_first->prev = coro;
2193 coro->next = coro_first;
2194 coro_first = coro;
2195
974 hv = newHV (); 2196 coro->hv = hv = newHV ();
975 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2197 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2198 mg->mg_flags |= MGf_DUP;
976 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2199 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977 2200
978 av_push (coro->args, newSVsv (RETVAL)); 2201 av_extend (coro->args, items - 1);
979 for (i = 1; i < items; i++) 2202 for (i = 1; i < items; i++)
980 av_push (coro->args, newSVsv (ST (i))); 2203 av_push (coro->args, newSVsv (ST (i)));
981
982 coro->stack = main_stack;
983 /*coro->mainstack = 0; *//*actual work is done inside transfer */
984 /*coro->stack = 0;*/
985} 2204}
986 OUTPUT: 2205 OUTPUT:
987 RETVAL 2206 RETVAL
988 2207
989void 2208void
990transfer (prev, next, flags) 2209_set_stacklevel (...)
991 SV *prev 2210 CODE:
992 SV *next 2211 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
993 int flags
994 CODE:
995 PUTBACK;
996 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997 SPAGAIN;
998
999int
1000prio (Coro::State coro, int newprio = 0)
1001 ALIAS:
1002 nice = 1
1003 CODE:
1004{
1005 RETVAL = coro->prio;
1006
1007 if (items > 1)
1008 {
1009 if (ix)
1010 newprio += coro->prio;
1011
1012 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1013 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1014
1015 coro->prio = newprio;
1016 }
1017}
1018 2212
1019void 2213void
1020_clear_idle_sp (Coro::State self) 2214transfer (...)
2215 PROTOTYPE: $$
1021 CODE: 2216 CODE:
1022 self->stack->idle_sp = 0; 2217 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2218
2219bool
2220_destroy (SV *coro_sv)
2221 CODE:
2222 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2223 OUTPUT:
2224 RETVAL
1023 2225
1024void 2226void
1025_clone_state_from (SV *dst, SV *src)
1026 CODE:
1027{
1028 struct coro *coro_src = SvSTATE (src);
1029
1030 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031
1032 ++coro_src->refcnt;
1033 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1034}
1035
1036void
1037_exit (code) 2227_exit (int code)
1038 int code
1039 PROTOTYPE: $ 2228 PROTOTYPE: $
1040 CODE: 2229 CODE:
1041 _exit (code); 2230 _exit (code);
1042 2231
1043MODULE = Coro::State PACKAGE = Coro::Cont 2232int
2233cctx_stacksize (int new_stacksize = 0)
2234 PROTOTYPE: ;$
2235 CODE:
2236 RETVAL = cctx_stacksize;
2237 if (new_stacksize)
2238 {
2239 cctx_stacksize = new_stacksize;
2240 ++cctx_gen;
2241 }
2242 OUTPUT:
2243 RETVAL
2244
2245int
2246cctx_max_idle (int max_idle = 0)
2247 PROTOTYPE: ;$
2248 CODE:
2249 RETVAL = cctx_max_idle;
2250 if (max_idle > 1)
2251 cctx_max_idle = max_idle;
2252 OUTPUT:
2253 RETVAL
2254
2255int
2256cctx_count ()
2257 PROTOTYPE:
2258 CODE:
2259 RETVAL = cctx_count;
2260 OUTPUT:
2261 RETVAL
2262
2263int
2264cctx_idle ()
2265 PROTOTYPE:
2266 CODE:
2267 RETVAL = cctx_idle;
2268 OUTPUT:
2269 RETVAL
1044 2270
1045void 2271void
1046yield (...) 2272list ()
1047 PROTOTYPE: @ 2273 PROTOTYPE:
2274 PPCODE:
2275{
2276 struct coro *coro;
2277 for (coro = coro_first; coro; coro = coro->next)
2278 if (coro->hv)
2279 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2280}
2281
2282void
2283call (Coro::State coro, SV *coderef)
2284 ALIAS:
2285 eval = 1
2286 CODE:
2287{
2288 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2289 {
2290 struct coro temp;
2291
2292 if (!(coro->flags & CF_RUNNING))
2293 {
2294 PUTBACK;
2295 save_perl (aTHX_ &temp);
2296 load_perl (aTHX_ coro);
2297 }
2298
2299 {
2300 dSP;
2301 ENTER;
2302 SAVETMPS;
2303 PUTBACK;
2304 PUSHSTACK;
2305 PUSHMARK (SP);
2306
2307 if (ix)
2308 eval_sv (coderef, 0);
2309 else
2310 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2311
2312 POPSTACK;
2313 SPAGAIN;
2314 FREETMPS;
2315 LEAVE;
2316 PUTBACK;
2317 }
2318
2319 if (!(coro->flags & CF_RUNNING))
2320 {
2321 save_perl (aTHX_ coro);
2322 load_perl (aTHX_ &temp);
2323 SPAGAIN;
2324 }
2325 }
2326}
2327
2328SV *
2329is_ready (Coro::State coro)
2330 PROTOTYPE: $
2331 ALIAS:
2332 is_ready = CF_READY
2333 is_running = CF_RUNNING
2334 is_new = CF_NEW
2335 is_destroyed = CF_DESTROYED
2336 CODE:
2337 RETVAL = boolSV (coro->flags & ix);
2338 OUTPUT:
2339 RETVAL
2340
2341void
2342throw (Coro::State self, SV *throw = &PL_sv_undef)
2343 PROTOTYPE: $;$
1048 CODE: 2344 CODE:
1049{ 2345 SvREFCNT_dec (self->throw);
1050 SV *yieldstack; 2346 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1051 SV *sv;
1052 AV *defav = GvAV (PL_defgv);
1053 struct coro *prev, *next;
1054 2347
1055 yieldstack = *hv_fetch ( 2348void
1056 (HV *)SvRV (GvSV (coro_current)), 2349api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1057 "yieldstack", sizeof ("yieldstack") - 1, 2350 PROTOTYPE: $;$
2351 C_ARGS: aTHX_ coro, flags
2352
2353SV *
2354has_cctx (Coro::State coro)
2355 PROTOTYPE: $
2356 CODE:
2357 RETVAL = boolSV (!!coro->cctx);
2358 OUTPUT:
2359 RETVAL
2360
2361int
2362is_traced (Coro::State coro)
2363 PROTOTYPE: $
2364 CODE:
2365 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2366 OUTPUT:
2367 RETVAL
2368
2369UV
2370rss (Coro::State coro)
2371 PROTOTYPE: $
2372 ALIAS:
2373 usecount = 1
2374 CODE:
2375 switch (ix)
2376 {
2377 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2378 case 1: RETVAL = coro->usecount; break;
1058 0 2379 }
2380 OUTPUT:
2381 RETVAL
2382
2383void
2384force_cctx ()
2385 PROTOTYPE:
2386 CODE:
2387 SvSTATE_current->cctx->idle_sp = 0;
2388
2389void
2390swap_defsv (Coro::State self)
2391 PROTOTYPE: $
2392 ALIAS:
2393 swap_defav = 1
2394 CODE:
2395 if (!self->slot)
2396 croak ("cannot swap state with coroutine that has no saved state,");
2397 else
1059 ); 2398 {
2399 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2400 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1060 2401
1061 /* set up @_ -- ugly */ 2402 SV *tmp = *src; *src = *dst; *dst = tmp;
1062 av_clear (defav); 2403 }
1063 av_fill (defav, items - 1);
1064 while (items--)
1065 av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067 sv = av_pop ((AV *)SvRV (yieldstack));
1068 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1069 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1070 SvREFCNT_dec (sv);
1071
1072 coro_state_transfer (aTHX_ prev, next, 0);
1073}
1074 2404
1075MODULE = Coro::State PACKAGE = Coro 2405MODULE = Coro::State PACKAGE = Coro
1076 2406
1077BOOT: 2407BOOT:
1078{ 2408{
1079 int i; 2409 int i;
1080 2410
2411 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2412 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2413 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2414
2415 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2416 SvREADONLY_on (coro_current);
2417
1081 coro_stash = gv_stashpv ("Coro", TRUE); 2418 coro_stash = gv_stashpv ("Coro", TRUE);
1082 2419
1083 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2420 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1084 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2421 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1085 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2422 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2423 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2424 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2425 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089 2426
1090 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1091 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1092
1093 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2427 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094 coro_ready[i] = newAV (); 2428 coro_ready[i] = newAV ();
1095 2429
1096 { 2430 {
1097 SV *sv = perl_get_sv("Coro::API", 1); 2431 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1098 2432
1099 coroapi.schedule = api_schedule; 2433 coroapi.schedule = api_schedule;
1100 coroapi.cede = api_cede; 2434 coroapi.cede = api_cede;
2435 coroapi.cede_notself = api_cede_notself;
1101 coroapi.ready = api_ready; 2436 coroapi.ready = api_ready;
2437 coroapi.is_ready = api_is_ready;
1102 coroapi.nready = &coro_nready; 2438 coroapi.nready = coro_nready;
1103 coroapi.current = coro_current; 2439 coroapi.current = coro_current;
1104 2440
1105 GCoroAPI = &coroapi; 2441 GCoroAPI = &coroapi;
1106 sv_setiv (sv, (IV)&coroapi); 2442 sv_setiv (sv, (IV)&coroapi);
1107 SvREADONLY_on (sv); 2443 SvREADONLY_on (sv);
1108 } 2444 }
1109} 2445}
1110 2446
1111void 2447void
2448schedule (...)
2449 CODE:
2450 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2451
2452void
2453cede (...)
2454 CODE:
2455 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2456
2457void
2458cede_notself (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2461
2462void
2463_set_current (SV *current)
2464 PROTOTYPE: $
2465 CODE:
2466 SvREFCNT_dec (SvRV (coro_current));
2467 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2468
2469void
2470_set_readyhook (SV *hook)
2471 PROTOTYPE: $
2472 CODE:
2473 SvREFCNT_dec (coro_readyhook);
2474 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2475
2476int
2477prio (Coro::State coro, int newprio = 0)
2478 PROTOTYPE: $;$
2479 ALIAS:
2480 nice = 1
2481 CODE:
2482{
2483 RETVAL = coro->prio;
2484
2485 if (items > 1)
2486 {
2487 if (ix)
2488 newprio = coro->prio - newprio;
2489
2490 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2491 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2492
2493 coro->prio = newprio;
2494 }
2495}
2496 OUTPUT:
2497 RETVAL
2498
2499SV *
1112ready (SV *self) 2500ready (SV *self)
1113 PROTOTYPE: $ 2501 PROTOTYPE: $
1114 CODE: 2502 CODE:
1115 api_ready (self); 2503 RETVAL = boolSV (api_ready (aTHX_ self));
2504 OUTPUT:
2505 RETVAL
1116 2506
1117int 2507int
1118nready (...) 2508nready (...)
1119 PROTOTYPE: 2509 PROTOTYPE:
1120 CODE: 2510 CODE:
1121 RETVAL = coro_nready; 2511 RETVAL = coro_nready;
1122 OUTPUT: 2512 OUTPUT:
1123 RETVAL 2513 RETVAL
1124 2514
2515# for async_pool speedup
1125void 2516void
1126schedule (...) 2517_pool_1 (SV *cb)
1127 PROTOTYPE:
1128 CODE: 2518 CODE:
1129 api_schedule (); 2519{
2520 HV *hv = (HV *)SvRV (coro_current);
2521 struct coro *coro = SvSTATE_hv ((SV *)hv);
2522 AV *defav = GvAV (PL_defgv);
2523 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2524 AV *invoke_av;
2525 int i, len;
2526
2527 if (!invoke)
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 SvREFCNT_dec (coro->saved_deffh);
2536 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2537
2538 hv_store (hv, "desc", sizeof ("desc") - 1,
2539 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2540
2541 invoke_av = (AV *)SvRV (invoke);
2542 len = av_len (invoke_av);
2543
2544 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2545
2546 if (len > 0)
2547 {
2548 av_fill (defav, len - 1);
2549 for (i = 0; i < len; ++i)
2550 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2551 }
2552}
1130 2553
1131void 2554void
1132_set_cede_self () 2555_pool_2 (SV *cb)
1133 CODE: 2556 CODE:
1134 coro_cede_self = 1; 2557{
2558 struct coro *coro = SvSTATE_current;
2559
2560 sv_setsv (cb, &PL_sv_undef);
2561
2562 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2563 coro->saved_deffh = 0;
2564
2565 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2566 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2567 {
2568 SV *old = PL_diehook;
2569 PL_diehook = 0;
2570 SvREFCNT_dec (old);
2571 croak ("\3async_pool terminate\2\n");
2572 }
2573
2574 av_clear (GvAV (PL_defgv));
2575 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2576 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2577
2578 coro->prio = 0;
2579
2580 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2581 api_trace (aTHX_ coro_current, 0);
2582
2583 av_push (av_async_pool, newSVsv (coro_current));
2584}
2585
2586
2587MODULE = Coro::State PACKAGE = Coro::AIO
1135 2588
1136void 2589void
1137cede (...) 2590_get_state (SV *self)
1138 PROTOTYPE: 2591 PROTOTYPE: $
2592 PPCODE:
2593{
2594 AV *defav = GvAV (PL_defgv);
2595 AV *av = newAV ();
2596 int i;
2597 SV *data_sv = newSV (sizeof (struct io_state));
2598 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2599 SvCUR_set (data_sv, sizeof (struct io_state));
2600 SvPOK_only (data_sv);
2601
2602 data->errorno = errno;
2603 data->laststype = PL_laststype;
2604 data->laststatval = PL_laststatval;
2605 data->statcache = PL_statcache;
2606
2607 av_extend (av, AvFILLp (defav) + 1 + 1);
2608
2609 for (i = 0; i <= AvFILLp (defav); ++i)
2610 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2611
2612 av_push (av, data_sv);
2613
2614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2615
2616 api_ready (aTHX_ self);
2617}
2618
2619void
2620_set_state (SV *state)
2621 PROTOTYPE: $
2622 PPCODE:
2623{
2624 AV *av = (AV *)SvRV (state);
2625 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2626 int i;
2627
2628 errno = data->errorno;
2629 PL_laststype = data->laststype;
2630 PL_laststatval = data->laststatval;
2631 PL_statcache = data->statcache;
2632
2633 EXTEND (SP, AvFILLp (av));
2634 for (i = 0; i < AvFILLp (av); ++i)
2635 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2636}
2637
2638
2639MODULE = Coro::State PACKAGE = Coro::AnyEvent
2640
2641BOOT:
2642 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2643
2644void
2645_schedule (...)
1139 CODE: 2646 CODE:
2647{
2648 static int incede;
2649
1140 api_cede (); 2650 api_cede_notself (aTHX);
1141 2651
2652 ++incede;
2653 while (coro_nready >= incede && api_cede (aTHX))
2654 ;
2655
2656 sv_setsv (sv_activity, &PL_sv_undef);
2657 if (coro_nready >= incede)
2658 {
2659 PUSHMARK (SP);
2660 PUTBACK;
2661 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2662 SPAGAIN;
2663 }
2664
2665 --incede;
2666}
2667
2668
2669MODULE = Coro::State PACKAGE = PerlIO::cede
2670
2671BOOT:
2672 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2673
1142MODULE = Coro::State PACKAGE = Coro::AIO 2674MODULE = Coro::State PACKAGE = Coro::Semaphore
1143 2675
1144SV * 2676SV *
1145_get_state () 2677new (SV *klass, SV *count_ = 0)
1146 CODE: 2678 CODE:
1147{ 2679{
1148 struct { 2680 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1149 int errorno; 2681 AV *av = newAV ();
1150 int laststype; 2682 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1151 int laststatval; 2683 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1152 Stat_t statcache;
1153 } data;
1154
1155 data.errorno = errno;
1156 data.laststype = PL_laststype;
1157 data.laststatval = PL_laststatval;
1158 data.statcache = PL_statcache;
1159
1160 RETVAL = newSVpvn ((char *)&data, sizeof data);
1161} 2684}
1162 OUTPUT: 2685 OUTPUT:
1163 RETVAL 2686 RETVAL
1164 2687
2688SV *
2689count (SV *self)
2690 CODE:
2691 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2692 OUTPUT:
2693 RETVAL
2694
1165void 2695void
1166_set_state (char *data_) 2696up (SV *self, int adjust = 1)
1167 PROTOTYPE: $ 2697 ALIAS:
2698 adjust = 1
2699 CODE:
2700 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2701
2702void
2703down (SV *self)
2704 CODE:
2705 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2706
2707void
2708try (SV *self)
2709 PPCODE:
2710{
2711 AV *av = (AV *)SvRV (self);
2712 SV *count_sv = AvARRAY (av)[0];
2713 IV count = SvIVX (count_sv);
2714
2715 if (count > 0)
2716 {
2717 --count;
2718 SvIVX (count_sv) = count;
2719 XSRETURN_YES;
2720 }
2721 else
2722 XSRETURN_NO;
2723}
2724
2725void
2726waiters (SV *self)
1168 CODE: 2727 CODE:
1169{ 2728{
1170 struct { 2729 AV *av = (AV *)SvRV (self);
2730
2731 if (GIMME_V == G_SCALAR)
2732 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2733 else
2734 {
1171 int errorno; 2735 int i;
1172 int laststype; 2736 EXTEND (SP, AvFILLp (av) + 1 - 1);
1173 int laststatval; 2737 for (i = 1; i <= AvFILLp (av); ++i)
1174 Stat_t statcache; 2738 PUSHs (newSVsv (AvARRAY (av)[i]));
1175 } *data = (void *)data_; 2739 }
1176
1177 errno = data->errorno;
1178 PL_laststype = data->laststype;
1179 PL_laststatval = data->laststatval;
1180 PL_statcache = data->statcache;
1181} 2740}
2741

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