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Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
33 105
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 107# undef CORO_STACKGUARD
36#endif 108#endif
37 109
38#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 111# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
51# endif 153# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61 154
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64
65/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69
70#define IN_DESTRUCT (PL_main_cv == Nullcv)
71
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else 155#else
156
81# define LOCK (void)0 157# define LOCK (void)0
82# define UNLOCK (void)0 158# define UNLOCK (void)0
83#endif
84 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
85static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
87static HV *coro_state_stash; 184static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
91 187
92/* this is actually not only the c stack but also c registers etc... */ 188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
214/* this is a structure representing a c-level coroutine */
93typedef struct { 215typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 216{
95 int usecnt; /* shared by how many coroutines */ 217 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 218
219 /* the stack */
220 void *sptr;
221 size_t ssize;
222
223 /* cpu state */
224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
226 JMPENV *top_env;
98 coro_context cctx; 227 coro_context cctx;
99 228
100 void *sptr; 229 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 230#if CORO_USE_VALGRIND
102} coro_stack; 231 int valgrind_id;
232#endif
233 unsigned char flags;
234} coro_cctx;
103 235
236enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
242
243/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct
245{
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is a structure representing a perl-level coroutine */
104struct coro { 258struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 259 /* the C coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 260 coro_cctx *cctx;
107 261
108 /* the optional C context */ 262 /* process data */
109 coro_stack *stack; 263 struct CoroSLF slf_frame; /* saved slf frame */
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 264 AV *mainstack;
126 SV **stack_sp; 265 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 266
153 /* data associated with this coroutine (initial args) */ 267 AV *args; /* data associated with this coroutine (initial args) */
154 AV *args; 268 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */
271
272 /* statistics */
273 int usecount; /* number of transfers to this coro */
274
275 /* coro process data */
276 int prio;
277 SV *throw; /* exception to be thrown */
278
279 /* async_pool */
280 SV *saved_deffh;
281
282 /* linked list */
283 struct coro *next, *prev;
155}; 284};
156 285
157typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
159 288
289static struct CoroSLF slf_frame; /* the current slf frame */
290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
160static AV * 339static AV *
161coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
162{ 341{
163 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
165 344
166 newpadlist = newAV (); 345 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
168#if PERL_VERSION < 9 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#endif 351#endif
173 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174 --AvFILLp (padlist); 353 --AvFILLp (padlist);
175 354
176 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
177 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
178 357
179 return newpadlist; 358 return newpadlist;
180} 359}
181 360
… …
211 390
212 /* casting is fun. */ 391 /* casting is fun. */
213 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214 free_padlist (aTHX_ padlist); 393 free_padlist (aTHX_ padlist);
215 394
216 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
217 396
218 return 0; 397 return 0;
219} 398}
220 399
221#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
222 402
223static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
224 443
225/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
226static void 445static void
227get_padlist (pTHX_ CV *cv) 446get_padlist (pTHX_ CV *cv)
228{ 447{
229 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
230 450
231 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
232 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233 else 453 else
234 { 454 {
235#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
236 /* this should work - but it doesn't :( */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
237 CV *cp = Perl_cv_clone (aTHX_ cv); 458 CV *cp = Perl_cv_clone (cv);
238 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
239 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
240 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
241#else 462#else
242 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
245} 466}
246 467
247static void 468static void
248put_padlist (pTHX_ CV *cv) 469put_padlist (pTHX_ CV *cv)
249{ 470{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
251 473
252 if (!mg) 474 if (expect_false (!mg))
253 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
254 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256 mg->mg_virtual = &vtbl_coro;
257 mg->mg_obj = (SV *)newAV ();
258 }
259 476
260 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
261}
262 478
263#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
264#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
265 481
266#define LOAD(state) load_state(aTHX_ (state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 483}
268 484
269#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
270 486
271static void 487static void
272load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
273{ 489{
274 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
275 PL_in_eval = c->in_eval; 491 c->slot = 0;
276 492
277 PL_curstackinfo = c->curstackinfo;
278 PL_curstack = c->curstack;
279 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
280 PL_stack_sp = c->stack_sp;
281 PL_op = c->op;
282 PL_curpad = c->curpad;
283 PL_comppad = c->comppad;
284 PL_compcv = c->compcv;
285 PL_stack_base = c->stack_base;
286 PL_stack_max = c->stack_max;
287 PL_tmps_stack = c->tmps_stack;
288 PL_tmps_floor = c->tmps_floor;
289 PL_tmps_ix = c->tmps_ix;
290 PL_tmps_max = c->tmps_max;
291 PL_markstack = c->markstack;
292 PL_markstack_ptr = c->markstack_ptr;
293 PL_markstack_max = c->markstack_max;
294 PL_scopestack = c->scopestack;
295 PL_scopestack_ix = c->scopestack_ix;
296 PL_scopestack_max = c->scopestack_max;
297 PL_savestack = c->savestack;
298 PL_savestack_ix = c->savestack_ix;
299 PL_savestack_max = c->savestack_max;
300#if PERL_VERSION < 9
301 PL_retstack = c->retstack;
302 PL_retstack_ix = c->retstack_ix;
303 PL_retstack_max = c->retstack_max;
304#endif
305 PL_curpm = c->curpm;
306 PL_curcop = c->curcop;
307 PL_top_env = c->top_env;
308 494
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
312 503
313 { 504 {
314 dSP; 505 dSP;
506
315 CV *cv; 507 CV *cv;
316 508
317 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
319 { 511 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
326 } 514 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 515 }
330 516
331 PUTBACK; 517 PUTBACK;
332 } 518 }
333}
334 519
520 slf_frame = c->slf_frame;
521}
522
335static void 523static void
336save_state(pTHX_ Coro__State c, int flags) 524save_perl (pTHX_ Coro__State c)
337{ 525{
526 c->slf_frame = slf_frame;
527
338 { 528 {
339 dSP; 529 dSP;
340 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
344 /* 534 /*
345 * the worst thing you can imagine happens first - we have to save 535 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
347 */ 537 */
348 538
349 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
351 for (;;) 541 for (;;)
352 { 542 {
353 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
354 { 544 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
356 546
357 if (CxTYPE(cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358 { 548 {
359 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
550
360 if (CvDEPTH(cv)) 551 if (expect_true (CvDEPTH (cv)))
361 { 552 {
362 EXTEND (SP, CvDEPTH(cv)*2); 553 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
373 557
558 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 559 get_padlist (aTHX_ cv);
375 } 560 }
376 } 561 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 562 }
386 563
387 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 565 break;
389 566
390 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
393 } 570 }
394 571
395 PUTBACK; 572 PUTBACK;
396 } 573 }
397 574
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 586
402 c->dowarn = PL_dowarn;
403 c->in_eval = PL_in_eval;
404
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack; 587 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 588
409 c->op = PL_op; 589 {
410 c->curpad = PL_curpad; 590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 591
412 c->compcv = PL_compcv; 592 slot->defav = GvAV (PL_defgv);
413 c->stack_base = PL_stack_base; 593 slot->defsv = DEFSV;
414 c->stack_max = PL_stack_max; 594 slot->errsv = ERRSV;
415 c->tmps_stack = PL_tmps_stack; 595 slot->irsgv = GvSV (irsgv);
416 c->tmps_floor = PL_tmps_floor; 596
417 c->tmps_ix = PL_tmps_ix; 597 #define VAR(name,type) slot->name = PL_ ## name;
418 c->tmps_max = PL_tmps_max; 598 # include "state.h"
419 c->markstack = PL_markstack; 599 #undef VAR
420 c->markstack_ptr = PL_markstack_ptr; 600 }
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435 c->top_env = PL_top_env;
436} 601}
437 602
438/* 603/*
439 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
443 */ 608 */
609#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks
611#else
444static void 612static void
445coro_init_stacks (pTHX) 613coro_init_stacks (pTHX)
446{ 614{
447 LOCK; 615 PL_curstackinfo = new_stackinfo(32, 8);
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 619
454 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 623
458 New(50,PL_tmps_stack,96,SV*); 624 New(50,PL_tmps_stack,32,SV*);
459 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 627 PL_tmps_max = 32;
462 628
463 New(54,PL_markstack,16,I32); 629 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 631 PL_markstack_max = PL_markstack + 16;
466 632
467#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
469#endif 635#endif
470 636
471 New(54,PL_scopestack,16,I32); 637 New(54,PL_scopestack,8,I32);
472 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 639 PL_scopestack_max = 8;
474 640
475 New(54,PL_savestack,96,ANY); 641 New(54,PL_savestack,24,ANY);
476 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 643 PL_savestack_max = 24;
478 644
479#if PERL_VERSION < 9 645#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 646 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 648 PL_retstack_max = 4;
483#endif 649#endif
484
485 UNLOCK;
486} 650}
651#endif
487 652
488/* 653/*
489 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
490 */ 655 */
491static void 656static void
492destroy_stacks(pTHX) 657coro_destruct_stacks (pTHX)
493{ 658{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 LEAVE_SCOPE (0);
498
499 /* sure it is, but more important: is it correct?? :/ */
500 FREETMPS;
501
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 }
504
505 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
507 661
508 while (PL_curstackinfo) 662 while (PL_curstackinfo)
509 { 663 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 664 PERL_SI *p = PL_curstackinfo->si_prev;
511 665
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 666 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 667 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 668
524 Safefree (PL_curstackinfo->si_cxstack); 669 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 670 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 671 PL_curstackinfo = p;
527 } 672 }
528 673
529 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 675 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
532 Safefree (PL_savestack); 677 Safefree (PL_savestack);
533#if PERL_VERSION < 9 678#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree (PL_retstack); 679 Safefree (PL_retstack);
535#endif 680#endif
536} 681}
537 682
538static void 683static size_t
539allocate_stack (Coro__State ctx, int alloc) 684coro_rss (pTHX_ struct coro *coro)
540{ 685{
541 coro_stack *stack; 686 size_t rss = sizeof (*coro);
542 687
543 New (0, stack, 1, coro_stack); 688 if (coro->mainstack)
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548
549 if (alloc)
550 { 689 {
551#if HAVE_MMAP 690 perl_slots tmp_slot;
552 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 691 perl_slots *slot;
553 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 692
554 if (stack->sptr != (void *)-1) 693 if (coro->flags & CF_RUNNING)
555 { 694 {
556# if STACKGUARD 695 slot = &tmp_slot;
557 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 696
558# endif 697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
559 } 700 }
560 else 701 else
561#endif 702 slot = coro->slot;
703
704 if (slot)
562 { 705 {
563 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 706 rss += sizeof (slot->curstackinfo);
564 New (0, stack->sptr, STACKSIZE, long); 707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
565 } 717 }
566 } 718 }
567 else
568 stack->sptr = 0;
569 719
570 ctx->stack = stack; 720 return rss;
571} 721}
572 722
723/** coroutine stack handling ************************************************/
724
725static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
727static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
728
729/* apparently < 5.8.8 */
730#ifndef MgPV_nolen_const
731#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
732 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
733 (const char*)(mg)->mg_ptr)
734#endif
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
573static void 745static int
574deallocate_stack (Coro__State ctx) 746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
575{ 747{
576 coro_stack *stack = ctx->stack; 748 const char *s = MgPV_nolen_const (mg);
577 749
578 ctx->stack = 0; 750 if (*s == '_')
579
580 if (stack)
581 { 751 {
582 if (!--stack->refcnt) 752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
583 { 758 {
584#ifdef HAVE_MMAP 759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
585 if (stack->ssize > 0 && stack->sptr) 760 return 0;
586 munmap (stack->sptr, stack->ssize);
587 else
588#endif
589 Safefree (stack->sptr);
590
591 Safefree (stack);
592 } 761 }
593 else if (ctx->gencnt == stack->gencnt) 762 }
594 --stack->usecnt; 763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
595 } 773 {
596} 774 SV **svp = 0;
597 775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
598static void 791static int
599setup_coro (void *arg) 792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816prepare_nop (pTHX_ struct coro_transfer_args *ta)
817{
818 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta;
820}
821
822static int
823slf_check_nop (pTHX_ struct CoroSLF *frame)
824{
825 return 0;
826}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
600{ 830{
601 /* 831 /*
602 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
603 */ 833 */
604 dTHX;
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 834 coro_init_stacks (aTHX);
610 /*PL_curcop = 0;*/ 835
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882
883static void
884coro_destruct (pTHX_ struct coro *coro)
885{
886 if (!IN_DESTRUCT)
887 {
888 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0);
890 assert (PL_tmps_floor == -1);
891
892 /* free all temporaries */
893 FREETMPS;
894 assert (PL_tmps_ix == -1);
895
896 /* unwind all extra stacks */
897 POPSTACK_TO (PL_mainstack);
898
899 /* unwind main stack */
900 dounwind (-1);
901 }
902
903 SvREFCNT_dec (GvSV (PL_defgv));
612 SvREFCNT_dec (GvAV (PL_defgv)); 904 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
614 909
615 SPAGAIN; 910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
616 915
617 if (ctx->stack) 916 coro_destruct_stacks (aTHX);
618 { 917}
619 ctx->cursp = 0;
620 918
621 PUSHMARK(SP); 919INLINE void
622 PUTBACK; 920free_coro_mortal (pTHX)
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 921{
624 922 if (expect_true (coro_mortal))
625 if (SvTRUE (ERRSV))
626 croak (NULL);
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 } 923 {
630 else 924 SvREFCNT_dec (coro_mortal);
925 coro_mortal = 0;
631 { 926 }
632 UNOP myop; 927}
633 928
634 Zero(&myop, 1, UNOP); 929static int
635 myop.op_next = Nullop; 930runops_trace (pTHX)
636 myop.op_flags = OPf_WANT_VOID; 931{
932 COP *oldcop = 0;
933 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
637 936
638 PL_op = (OP *)&myop; 937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
639
640 PUSHMARK(SP);
641 XPUSHs (sub_init);
642 /*
643 * the next line is slightly wrong, as PL_op->op_next
644 * is actually being executed so we skip the first op.
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651 SPAGAIN;
652
653 ENTER; /* necessary e.g. for dounwind */
654 } 938 {
655} 939 PERL_ASYNC_CHECK ();
656 940
657static void 941 if (cctx->flags & CC_TRACE_ALL)
658continue_coro (void *arg)
659{
660 /*
661 * this is a _very_ stripped down perl interpreter ;)
662 */
663 dTHX;
664 Coro__State ctx = (Coro__State)arg;
665
666 PL_top_env = &ctx->start_env;
667
668 ctx->cursp = 0;
669 PL_op = PL_op->op_next;
670 CALLRUNOPS(aTHX);
671
672 abort ();
673}
674
675static void
676transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677{
678 dSTACKLEVEL;
679
680 if (prev != next)
681 {
682 if (next->mainstack)
683 { 942 {
684 LOCK; 943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
685 SAVE (prev, flags);
686 LOAD (next);
687 UNLOCK;
688
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 { 944 {
696 if (!prev->stack) 945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 allocate_stack (prev, 0); 946 SV **bot, **top;
698 else if (prev->cursp != stacklevel 947 AV *av = newAV (); /* return values */
699 && prev->stack->usecnt > 1) 948 SV **cb;
949 dSP;
950
951 GV *gv = CvGV (cx->blk_sub.cv);
952 SV *fullname = sv_2mortal (newSV (0));
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 bot = PL_stack_base + cx->blk_oldsp + 1;
957 top = cx->blk_gimme == G_ARRAY ? SP + 1
958 : cx->blk_gimme == G_SCALAR ? bot + 1
959 : bot;
960
961 av_extend (av, top - bot);
962 while (bot < top)
963 av_push (av, SvREFCNT_inc_NN (*bot++));
964
965 PL_runops = RUNOPS_DEFAULT;
966 ENTER;
967 SAVETMPS;
968 EXTEND (SP, 3);
969 PUSHMARK (SP);
970 PUSHs (&PL_sv_no);
971 PUSHs (fullname);
972 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
973 PUTBACK;
974 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
975 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
976 SPAGAIN;
977 FREETMPS;
978 LEAVE;
979 PL_runops = runops_trace;
980 }
981
982 if (oldcop != PL_curcop)
983 {
984 oldcop = PL_curcop;
985
986 if (PL_curcop != &PL_compiling)
700 { 987 {
701 prev->gencnt = ++prev->stack->gencnt; 988 SV **cb;
702 prev->stack->usecnt = 1;
703 }
704 989
705 /* has our stack been invalidated? */ 990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 { 991 {
708 deallocate_stack (next); 992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
709 allocate_stack (next, 1); 993
710 coro_create (&(next->stack->cctx), 994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
711 continue_coro, (void *)next, 995 {
712 next->stack->sptr, labs (next->stack->ssize)); 996 runops_proc_t old_runops = PL_runops;
997 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0));
1000
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 ENTER;
1006 SAVETMPS;
1007 EXTEND (SP, 3);
1008 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN;
1016 FREETMPS;
1017 LEAVE;
1018 PL_runops = runops_trace;
1019 }
1020
1021 oldcxix = cxstack_ix;
713 } 1022 }
714 1023
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1024 if (cctx->flags & CC_TRACE_LINE)
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else
725 {
726 LOCK;
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729
730 if (flags & TRANSFER_SAVE_CCTXT)
731 {
732 if (!prev->stack)
733 allocate_stack (prev, 0);
734
735 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736 { 1025 {
737 PL_top_env = &next->start_env; 1026 dSP;
738 1027
739 setup_coro (next); 1028 PL_runops = RUNOPS_DEFAULT;
740 next->cursp = stacklevel; 1029 ENTER;
741 1030 SAVETMPS;
742 prev->stack->refcnt++; 1031 EXTEND (SP, 3);
743 prev->stack->usecnt++; 1032 PL_runops = RUNOPS_DEFAULT;
744 next->stack = prev->stack; 1033 PUSHMARK (SP);
745 next->gencnt = prev->gencnt; 1034 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1035 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
746 } 1043 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 } 1044 }
758 } 1045 }
759 else
760 {
761 setup_coro (next);
762 next->cursp = stacklevel;
763 }
764 } 1046 }
765 } 1047 }
766 1048
1049 TAINT_NOT;
1050 return 0;
1051}
1052
1053static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
1064static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx)
1066{
1067 dSP;
1068 UNOP myop;
1069
1070 PL_top_env = &PL_start_env;
1071
1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
1074
1075 Zero (&myop, 1, UNOP);
1076 myop.op_next = PL_op;
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1078
1079 PUSHMARK (SP);
1080 EXTEND (SP, 2);
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1083 PUTBACK;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086 SPAGAIN;
1087}
1088
1089/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void
1091transfer_tail (pTHX)
1092{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097 free_coro_mortal (aTHX);
1098 UNLOCK;
1099
1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX);
1134
1135 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op;
1137 perl_run (PL_curinterp);
1138
1139 /*
1140 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept
1145 */
1146 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
1149}
1150
1151static coro_cctx *
1152cctx_new ()
1153{
1154 coro_cctx *cctx;
1155
1156 ++cctx_count;
1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
1185
1186#if HAVE_MMAP
1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1188 /* mmap supposedly does allocate-on-write for us */
1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1190
1191 if (cctx->sptr != (void *)-1)
1192 {
1193 #if CORO_STACKGUARD
1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1195 #endif
1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1198 cctx->flags |= CC_MAPPED;
1199 }
1200 else
1201#endif
1202 {
1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1204 New (0, cctx->sptr, cctx_stacksize, long);
1205
1206 if (!cctx->sptr)
1207 {
1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1209 _exit (EXIT_FAILURE);
1210 }
1211
1212 stack_start = cctx->sptr;
1213 stack_size = cctx->ssize;
1214 }
1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1218 #endif
1219
1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1221
1222 return cctx;
1223}
1224
1225static void
1226cctx_destroy (coro_cctx *cctx)
1227{
1228 if (!cctx)
1229 return;
1230
1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
1233
1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1239 #endif
1240
1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
1243 munmap (cctx->sptr, cctx->ssize);
1244 else
1245#endif
1246 Safefree (cctx->sptr);
1247 }
1248
1249 Safefree (cctx);
1250}
1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
1255static coro_cctx *
1256cctx_get (pTHX)
1257{
1258 while (expect_true (cctx_first))
1259 {
1260 coro_cctx *cctx = cctx_first;
1261 cctx_first = cctx->next;
1262 --cctx_idle;
1263
1264 if (expect_true (!CCTX_EXPIRED (cctx)))
1265 return cctx;
1266
1267 cctx_destroy (cctx);
1268 }
1269
1270 return cctx_new_run ();
1271}
1272
1273static void
1274cctx_put (coro_cctx *cctx)
1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
1278 /* free another cctx if overlimit */
1279 if (expect_false (cctx_idle >= cctx_max_idle))
1280 {
1281 coro_cctx *first = cctx_first;
1282 cctx_first = first->next;
1283 --cctx_idle;
1284
1285 cctx_destroy (first);
1286 }
1287
1288 ++cctx_idle;
1289 cctx->next = cctx_first;
1290 cctx_first = cctx;
1291}
1292
1293/** coroutine switching *****************************************************/
1294
1295static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{
1298 if (expect_true (prev != next))
1299 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
1313 }
1314}
1315
1316/* always use the TRANSFER macro */
1317static void NOINLINE
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{
1320 dSTACKLEVEL;
1321
1322 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next))
1324 {
1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 }
1328 else if (expect_true (prev != next))
1329 {
1330 coro_cctx *prev__cctx;
1331
1332 if (expect_false (prev->flags & CF_NEW))
1333 {
1334 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING;
1338 }
1339
1340 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344
1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
1348 if (expect_false (next->flags & CF_NEW))
1349 {
1350 /* need to start coroutine */
1351 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */
1353 coro_setup (aTHX_ next);
1354 }
1355 else
1356 load_perl (aTHX_ next);
1357
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */
1361 if (expect_true (
1362 prev__cctx->idle_sp == (void *)stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
1366 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1369
1370 prev->cctx = 0;
1371
1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1376 next->cctx = cctx_get (aTHX);
1377
1378 cctx_put (prev__cctx);
1379 }
1380
1381 ++next->usecount;
1382
1383 if (expect_true (!next->cctx))
1384 next->cctx = cctx_get (aTHX);
1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1388
1389 if (expect_false (prev__cctx != next->cctx))
1390 {
1391 prev__cctx->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1394 }
1395
1396 transfer_tail (aTHX);
1397 }
1398}
1399
1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1402
1403/** high level stuff ********************************************************/
1404
1405static int
1406coro_state_destroy (pTHX_ struct coro *coro)
1407{
1408 if (coro->flags & CF_DESTROYED)
1409 return 0;
1410
1411 coro->flags |= CF_DESTROYED;
1412
1413 if (coro->flags & CF_READY)
1414 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready;
1419 UNLOCK;
1420 }
1421 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423
1424 if (coro->mainstack && coro->mainstack != main_mainstack)
1425 {
1426 struct coro temp;
1427
1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1429
1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro);
1432
1433 coro_destruct (aTHX_ coro);
1434
1435 load_perl (aTHX_ &temp);
1436
1437 coro->slot = 0;
1438 }
1439
1440 cctx_destroy (coro->cctx);
1441 SvREFCNT_dec (coro->args);
1442
1443 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next;
1446
1447 return 1;
1448}
1449
1450static int
1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1452{
1453 struct coro *coro = (struct coro *)mg->mg_ptr;
1454 mg->mg_ptr = 0;
1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
1463
1464 return 0;
1465}
1466
1467static int
1468coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1469{
1470 struct coro *coro = (struct coro *)mg->mg_ptr;
1471
1472 ++coro->refcnt;
1473
1474 return 0;
1475}
1476
1477static MGVTBL coro_state_vtbl = {
1478 0, 0, 0, 0,
1479 coro_state_free,
1480 0,
1481#ifdef MGf_DUP
1482 coro_state_dup,
1483#else
1484# define MGf_DUP 0
1485#endif
1486};
1487
1488static void
1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1490{
1491 ta->prev = SvSTATE (prev_sv);
1492 ta->next = SvSTATE (next_sv);
1493 TRANSFER_CHECK (*ta);
1494}
1495
1496static void
1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1498{
1499 struct coro_transfer_args ta;
1500
1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1502 TRANSFER (ta, 1);
1503}
1504
1505/** Coro ********************************************************************/
1506
1507static void
1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
1515{
1516 int prio;
1517
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
1521
1522 return 0;
1523}
1524
1525static int
1526api_ready (pTHX_ SV *coro_sv)
1527{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv);
1536
1537 if (coro->flags & CF_READY)
1538 return 0;
1539
1540 coro->flags |= CF_READY;
1541
767 LOCK; 1542 LOCK;
768 if (coro_mortal) 1543
769 { 1544 sv_hook = coro_nready ? 0 : coro_readyhook;
770 SvREFCNT_dec (coro_mortal); 1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
771 coro_mortal = 0; 1546
772 } 1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1548 ++coro_nready;
1549
773 UNLOCK; 1550 UNLOCK;
774} 1551
1552 if (sv_hook)
1553 {
1554 dSP;
775 1555
776#define SV_CORO(sv,func) \ 1556 ENTER;
777 do { \ 1557 SAVETMPS;
778 if (SvROK (sv)) \
779 sv = SvRV (sv); \
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796 1558
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
798 1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570
1571 return 1;
1572}
1573
799static void 1574static int
800api_transfer(pTHX_ SV *prev, SV *next, int flags) 1575api_is_ready (pTHX_ SV *coro_sv)
801{ 1576{
802 SV_CORO (prev, "Coro::transfer"); 1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
803 SV_CORO (next, "Coro::transfer");
804
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
806} 1578}
807 1579
1580INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1582{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1633 LOCK;
1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1636 UNLOCK;
1637}
1638
1639INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{
1642 api_ready (aTHX_ coro_current);
1643 prepare_schedule (aTHX_ ta);
1644}
1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
1655 }
1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1667}
1668
1669static int
1670api_cede (pTHX)
1671{
1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static int
1686api_cede_notself (pTHX)
1687{
1688 if (coro_nready)
1689 {
1690 struct coro_transfer_args ta;
1691
1692 prepare_cede_notself (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694 return 1;
1695 }
1696 else
1697 return 0;
1698}
1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
808/** Coro ********************************************************************/ 1725/*****************************************************************************/
1726/* PerlIO::cede */
809 1727
810#define PRIO_MAX 3 1728typedef struct
811#define PRIO_HIGH 1
812#define PRIO_NORMAL 0
813#define PRIO_LOW -1
814#define PRIO_IDLE -3
815#define PRIO_MIN -4
816
817/* for Coro.pm */
818static GV *coro_current, *coro_idle;
819static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820static int coro_nready;
821
822static void
823coro_enq (pTHX_ SV *sv)
824{ 1729{
825 SV **xprio; 1730 PerlIOBuf base;
826 int prio; 1731 NV next, every;
1732} PerlIOCede;
827 1733
828 if (SvTYPE (sv) != SVt_PVHV) 1734static IV
829 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1735PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1736{
1737 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
830 1738
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1739 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1740 self->next = nvtime () + self->every;
833 1741
834 prio = prio > PRIO_MAX ? PRIO_MAX 1742 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
835 : prio < PRIO_MIN ? PRIO_MIN
836 : prio;
837
838 av_push (coro_ready [prio - PRIO_MIN], sv);
839 coro_nready++;
840} 1743}
841 1744
842static SV * 1745static SV *
843coro_deq (pTHX_ int min_prio) 1746PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
844{ 1747{
845 int prio = PRIO_MAX - PRIO_MIN; 1748 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
846 1749
847 min_prio -= PRIO_MIN; 1750 return newSVnv (self->every);
848 if (min_prio < 0) 1751}
849 min_prio = 0;
850 1752
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1753static IV
852 if (av_len (coro_ready[prio]) >= 0) 1754PerlIOCede_flush (pTHX_ PerlIO *f)
1755{
1756 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757 double now = nvtime ();
1758
1759 if (now >= self->next)
1760 {
1761 api_cede (aTHX);
1762 self->next = now + self->every;
1763 }
1764
1765 return PerlIOBuf_flush (aTHX_ f);
1766}
1767
1768static PerlIO_funcs PerlIO_cede =
1769{
1770 sizeof(PerlIO_funcs),
1771 "cede",
1772 sizeof(PerlIOCede),
1773 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1774 PerlIOCede_pushed,
1775 PerlIOBuf_popped,
1776 PerlIOBuf_open,
1777 PerlIOBase_binmode,
1778 PerlIOCede_getarg,
1779 PerlIOBase_fileno,
1780 PerlIOBuf_dup,
1781 PerlIOBuf_read,
1782 PerlIOBuf_unread,
1783 PerlIOBuf_write,
1784 PerlIOBuf_seek,
1785 PerlIOBuf_tell,
1786 PerlIOBuf_close,
1787 PerlIOCede_flush,
1788 PerlIOBuf_fill,
1789 PerlIOBase_eof,
1790 PerlIOBase_error,
1791 PerlIOBase_clearerr,
1792 PerlIOBase_setlinebuf,
1793 PerlIOBuf_get_base,
1794 PerlIOBuf_bufsiz,
1795 PerlIOBuf_get_ptr,
1796 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt,
1798};
1799
1800/*****************************************************************************/
1801
1802static const CV *slf_cv; /* for quick consistency check */
1803
1804static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1805static SV *slf_arg0;
1806static SV *slf_arg1;
1807static SV *slf_arg2;
1808
1809/* this restores the stack in the case we patched the entersub, to */
1810/* recreate the stack frame as perl will on following calls */
1811/* since entersub cleared the stack */
1812static OP *
1813pp_restore (pTHX)
1814{
1815 dSP;
1816
1817 PUSHMARK (SP);
1818
1819 EXTEND (SP, 3);
1820 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1821 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1822 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1823 PUSHs ((SV *)CvGV (slf_cv));
1824
1825 RETURNOP (slf_restore.op_first);
1826}
1827
1828static void
1829slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1830{
1831 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1832}
1833
1834static void
1835slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1836{
1837 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1838
1839 frame->prepare = slf_prepare_set_stacklevel;
1840 frame->check = slf_check_nop;
1841 frame->data = (void *)SvIV (arg [0]);
1842}
1843
1844static void
1845slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1846{
1847 SV **arg = (SV **)slf_frame.data;
1848
1849 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1850}
1851
1852static void
1853slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1854{
1855 if (items != 2)
1856 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1857
1858 frame->prepare = slf_prepare_transfer;
1859 frame->check = slf_check_nop;
1860 frame->data = (void *)arg; /* let's hope it will stay valid */
1861}
1862
1863static void
1864slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1865{
1866 frame->prepare = prepare_schedule;
1867 frame->check = slf_check_nop;
1868}
1869
1870static void
1871slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1872{
1873 frame->prepare = prepare_cede;
1874 frame->check = slf_check_nop;
1875}
1876
1877static void
1878slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1879{
1880 frame->prepare = prepare_cede_notself;
1881 frame->check = slf_check_nop;
1882}
1883
1884/* we hijack an hopefully unused CV flag for our purposes */
1885#define CVf_SLF 0x4000
1886
1887/*
1888 * these not obviously related functions are all rolled into one
1889 * function to increase chances that they all will call transfer with the same
1890 * stack offset
1891 * SLF stands for "schedule-like-function".
1892 */
1893static OP *
1894pp_slf (pTHX)
1895{
1896 I32 checkmark; /* mark SP to see how many elements check has pushed */
1897
1898 /* set up the slf frame, unless it has already been set-up */
1899 /* the latter happens when a new coro has been started */
1900 /* or when a new cctx was attached to an existing coroutine */
1901 if (expect_true (!slf_frame.prepare))
1902 {
1903 /* first iteration */
1904 dSP;
1905 SV **arg = PL_stack_base + TOPMARK + 1;
1906 int items = SP - arg; /* args without function object */
1907 SV *gv = *sp;
1908
1909 /* do a quick consistency check on the "function" object, and if it isn't */
1910 /* for us, divert to the real entersub */
1911 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1912 return PL_ppaddr[OP_ENTERSUB](aTHX);
1913
1914 /* pop args */
1915 SP = PL_stack_base + POPMARK;
1916
1917 if (!(PL_op->op_flags & OPf_STACKED))
1918 {
1919 /* ampersand-form of call, use @_ instead of stack */
1920 AV *av = GvAV (PL_defgv);
1921 arg = AvARRAY (av);
1922 items = AvFILLp (av) + 1;
1923 }
1924
1925 PUTBACK;
1926
1927 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, GvCV (gv), arg, items);
1928 }
1929
1930 /* now interpret the slf_frame */
1931 /* we use a callback system not to make the code needlessly */
1932 /* complicated, but so we can run multiple perl coros from one cctx */
1933
1934 do
1935 {
1936 struct coro_transfer_args ta;
1937
1938 slf_frame.prepare (aTHX_ &ta);
1939 TRANSFER (ta, 0);
1940
1941 checkmark = PL_stack_sp - PL_stack_base;
1942 }
1943 while (slf_frame.check (aTHX_ &slf_frame));
1944
1945 {
1946 dSP;
1947 SV **bot = PL_stack_base + checkmark;
1948 int gimme = GIMME_V;
1949
1950 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1951
1952 /* make sure we put something on the stack in scalar context */
1953 if (gimme == G_SCALAR)
853 { 1954 {
854 coro_nready--; 1955 if (sp == bot)
855 return av_shift (coro_ready[prio]); 1956 XPUSHs (&PL_sv_undef);
1957
1958 SP = bot + 1;
856 } 1959 }
857 1960
1961 PUTBACK;
1962 }
1963
1964 return NORMAL;
1965}
1966
1967static void
1968api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1969{
1970 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1971
1972 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1973 && PL_op->op_ppaddr != pp_slf)
1974 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1975
1976 if (items > 3)
1977 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1978
1979 CvFLAGS (cv) |= CVf_SLF;
1980 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981 slf_cv = cv;
1982
1983 /* we patch the op, and then re-run the whole call */
1984 /* we have to put the same argument on the stack for this to work */
1985 /* and this will be done by pp_restore */
1986 slf_restore.op_next = (OP *)&slf_restore;
1987 slf_restore.op_type = OP_NULL;
1988 slf_restore.op_ppaddr = pp_restore;
1989 slf_restore.op_first = PL_op;
1990
1991 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1992 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1993 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1994
1995 PL_op->op_ppaddr = pp_slf;
1996
1997 PL_op = (OP *)&slf_restore;
1998}
1999
2000/*****************************************************************************/
2001
2002static int
2003slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2004{
2005 AV *av = (AV *)frame->data;
2006 SV *count_sv = AvARRAY (av)[0];
2007
2008 if (SvIVX (count_sv) > 0)
2009 {
2010 SvIVX (count_sv) = SvIVX (count_sv) - 1;
858 return 0; 2011 return 0;
859} 2012 }
2013 else
2014 {
2015 int i;
2016 /* if we were woken up but can't down, we look through the whole */
2017 /* waiters list and only add us if we aren't in there already */
2018 /* this avoids some degenerate memory usage cases */
860 2019
861static void 2020 for (i = 1; i <= AvFILLp (av); ++i)
862api_ready (SV *coro) 2021 if (AvARRAY (av)[i] == SvRV (coro_current))
863{ 2022 return 1;
864 dTHX;
865 2023
866 if (SvROK (coro)) 2024 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
867 coro = SvRV (coro); 2025 return 1;
868 2026 }
869 LOCK;
870 coro_enq (aTHX_ SvREFCNT_inc (coro));
871 UNLOCK;
872} 2027}
873 2028
874static void 2029static void
875api_schedule (void) 2030slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
876{ 2031{
877 dTHX; 2032 AV *av = (AV *)SvRV (arg [0]);
878 2033
879 SV *prev, *next; 2034 if (SvIVX (AvARRAY (av)[0]) > 0)
2035 {
2036 frame->data = (void *)av;
2037 frame->prepare = prepare_nop;
2038 }
2039 else
2040 {
2041 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
880 2042
881 LOCK; 2043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2044 frame->prepare = prepare_schedule;
2045 }
882 2046
883 prev = SvRV (GvSV (coro_current)); 2047 frame->check = slf_check_semaphore_down;
884 next = coro_deq (aTHX_ PRIO_MIN);
885 2048
886 if (!next)
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889 /* free this only after the transfer */
890 coro_mortal = prev;
891 SV_CORO (prev, "Coro::schedule");
892
893 SvRV (GvSV (coro_current)) = next;
894
895 SV_CORO (next, "Coro::schedule");
896
897 UNLOCK;
898
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901} 2049}
902 2050
903static void 2051/*****************************************************************************/
904api_cede (void)
905{
906 dTHX;
907 2052
908 LOCK; 2053#define GENSUB_ARG CvXSUBANY (cv).any_ptr
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910 UNLOCK;
911 2054
912 api_schedule (); 2055/* create a closure from XS, returns a code reference */
913} 2056/* the arg can be accessed via GENSUB_ARG from the callback */
2057/* the callback must use dXSARGS/XSRETURN */
2058static SV *
2059gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2060{
2061 CV *cv = (CV *)NEWSV (0, 0);
914 2062
2063 sv_upgrade ((SV *)cv, SVt_PVCV);
2064
2065 CvANON_on (cv);
2066 CvISXSUB_on (cv);
2067 CvXSUB (cv) = xsub;
2068 GENSUB_ARG = arg;
2069
2070 return newRV_noinc ((SV *)cv);
2071}
2072
2073/*****************************************************************************/
2074
915MODULE = Coro::State PACKAGE = Coro::State 2075MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 2076
917PROTOTYPES: ENABLE 2077PROTOTYPES: DISABLE
918 2078
919BOOT: 2079BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 2080{
921#ifdef USE_ITHREADS 2081#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 2082 MUTEX_INIT (&coro_lock);
2083# if CORO_PTHREAD
2084 coro_thx = PERL_GET_CONTEXT;
2085# endif
923#endif 2086#endif
924 BOOT_PAGESIZE; 2087 BOOT_PAGESIZE;
925 2088
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2089 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2090 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2091
2092 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2093 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2094 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2095
2096 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2097 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2098 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2099
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2100 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 2101
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2102 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2103 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2104 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2105 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934 2106
935 main_mainstack = PL_mainstack; 2107 main_mainstack = PL_mainstack;
2108 main_top_env = PL_top_env;
936 2109
2110 while (main_top_env->je_prev)
2111 main_top_env = main_top_env->je_prev;
2112
937 coroapi.ver = CORO_API_VERSION; 2113 coroapi.ver = CORO_API_VERSION;
2114 coroapi.rev = CORO_API_REVISION;
2115
938 coroapi.transfer = api_transfer; 2116 coroapi.transfer = api_transfer;
939}
940 2117
941Coro::State 2118 coroapi.sv_state = SvSTATE_;
942_newprocess(args) 2119 coroapi.execute_slf = api_execute_slf;
943 SV * args 2120 coroapi.prepare_nop = prepare_nop;
944 PROTOTYPE: $ 2121 coroapi.prepare_schedule = prepare_schedule;
2122 coroapi.prepare_cede = prepare_cede;
2123 coroapi.prepare_cede_notself = prepare_cede_notself;
2124
2125 {
2126 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2127
2128 if (!svp) croak ("Time::HiRes is required");
2129 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2130
2131 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2132 }
2133
2134 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2135}
2136
2137SV *
2138new (char *klass, ...)
945 CODE: 2139 CODE:
946 Coro__State coro; 2140{
2141 struct coro *coro;
2142 MAGIC *mg;
2143 HV *hv;
2144 int i;
947 2145
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949 croak ("Coro::State::_newprocess expects an arrayref");
950
951 Newz (0, coro, 1, struct coro); 2146 Newz (0, coro, 1, struct coro);
2147 coro->args = newAV ();
2148 coro->flags = CF_NEW;
952 2149
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2150 if (coro_first) coro_first->prev = coro;
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2151 coro->next = coro_first;
955 /*coro->stack = 0;*/ 2152 coro_first = coro;
956 2153
957 /* same as JMPENV_BOOTSTRAP */ 2154 coro->hv = hv = newHV ();
958 /* we might be able to recycle start_env, but safe is safe */ 2155 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
959 /*Zero (&coro->start_env, 1, JMPENV);*/ 2156 mg->mg_flags |= MGf_DUP;
960 coro->start_env.je_ret = -1; 2157 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961 coro->start_env.je_mustcatch = TRUE;
962 2158
963 RETVAL = coro; 2159 av_extend (coro->args, items - 1);
2160 for (i = 1; i < items; i++)
2161 av_push (coro->args, newSVsv (ST (i)));
2162}
964 OUTPUT: 2163 OUTPUT:
965 RETVAL 2164 RETVAL
966 2165
967void 2166void
968transfer(prev, next, flags) 2167_set_stacklevel (...)
969 SV *prev 2168 CODE:
970 SV *next 2169 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
971 int flags
972 PROTOTYPE: @
973 CODE:
974 PUTBACK;
975 SV_CORO (next, "Coro::transfer");
976 SV_CORO (prev, "Coro::transfer");
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
978 SPAGAIN;
979 2170
980void 2171void
981DESTROY(coro) 2172transfer (...)
982 Coro::State coro 2173 PROTOTYPE: $$
983 CODE: 2174 CODE:
2175 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
984 2176
985 if (coro->mainstack && coro->mainstack != main_mainstack) 2177bool
986 { 2178_destroy (SV *coro_sv)
987 struct coro temp; 2179 CODE:
988 2180 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
989 PUTBACK; 2181 OUTPUT:
990 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 2182 RETVAL
991 LOAD (aTHX_ coro);
992 SPAGAIN;
993
994 destroy_stacks (aTHX);
995
996 LOAD ((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
998
999 coro->mainstack = 0;
1000 }
1001
1002 deallocate_stack (coro);
1003 SvREFCNT_dec (coro->args);
1004 Safefree (coro);
1005 2183
1006void 2184void
1007_exit(code) 2185_exit (int code)
1008 int code
1009 PROTOTYPE: $ 2186 PROTOTYPE: $
1010 CODE: 2187 CODE:
1011 _exit (code); 2188 _exit (code);
1012 2189
1013MODULE = Coro::State PACKAGE = Coro::Cont 2190int
2191cctx_stacksize (int new_stacksize = 0)
2192 PROTOTYPE: ;$
2193 CODE:
2194 RETVAL = cctx_stacksize;
2195 if (new_stacksize)
2196 {
2197 cctx_stacksize = new_stacksize;
2198 ++cctx_gen;
2199 }
2200 OUTPUT:
2201 RETVAL
1014 2202
1015# this is slightly dirty (should expose a c-level api) 2203int
2204cctx_max_idle (int max_idle = 0)
2205 PROTOTYPE: ;$
2206 CODE:
2207 RETVAL = cctx_max_idle;
2208 if (max_idle > 1)
2209 cctx_max_idle = max_idle;
2210 OUTPUT:
2211 RETVAL
2212
2213int
2214cctx_count ()
2215 PROTOTYPE:
2216 CODE:
2217 RETVAL = cctx_count;
2218 OUTPUT:
2219 RETVAL
2220
2221int
2222cctx_idle ()
2223 PROTOTYPE:
2224 CODE:
2225 RETVAL = cctx_idle;
2226 OUTPUT:
2227 RETVAL
1016 2228
1017void 2229void
1018yield(...) 2230list ()
1019 PROTOTYPE: @ 2231 PROTOTYPE:
2232 PPCODE:
2233{
2234 struct coro *coro;
2235 for (coro = coro_first; coro; coro = coro->next)
2236 if (coro->hv)
2237 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2238}
2239
2240void
2241call (Coro::State coro, SV *coderef)
2242 ALIAS:
2243 eval = 1
2244 CODE:
2245{
2246 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2247 {
2248 struct coro temp;
2249
2250 if (!(coro->flags & CF_RUNNING))
2251 {
2252 PUTBACK;
2253 save_perl (aTHX_ &temp);
2254 load_perl (aTHX_ coro);
2255 }
2256
2257 {
2258 dSP;
2259 ENTER;
2260 SAVETMPS;
2261 PUTBACK;
2262 PUSHSTACK;
2263 PUSHMARK (SP);
2264
2265 if (ix)
2266 eval_sv (coderef, 0);
2267 else
2268 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2269
2270 POPSTACK;
2271 SPAGAIN;
2272 FREETMPS;
2273 LEAVE;
2274 PUTBACK;
2275 }
2276
2277 if (!(coro->flags & CF_RUNNING))
2278 {
2279 save_perl (aTHX_ coro);
2280 load_perl (aTHX_ &temp);
2281 SPAGAIN;
2282 }
2283 }
2284}
2285
2286SV *
2287is_ready (Coro::State coro)
2288 PROTOTYPE: $
2289 ALIAS:
2290 is_ready = CF_READY
2291 is_running = CF_RUNNING
2292 is_new = CF_NEW
2293 is_destroyed = CF_DESTROYED
2294 CODE:
2295 RETVAL = boolSV (coro->flags & ix);
2296 OUTPUT:
2297 RETVAL
2298
2299void
2300throw (Coro::State self, SV *throw = &PL_sv_undef)
2301 PROTOTYPE: $;$
1020 CODE: 2302 CODE:
1021 SV *yieldstack; 2303 SvREFCNT_dec (self->throw);
1022 SV *sv; 2304 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1023 AV *defav = GvAV (PL_defgv);
1024 struct coro *prev, *next;
1025 2305
1026 yieldstack = *hv_fetch ( 2306void
1027 (HV *)SvRV (GvSV (coro_current)), 2307api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1028 "yieldstack", sizeof ("yieldstack") - 1, 2308 PROTOTYPE: $;$
2309 C_ARGS: aTHX_ coro, flags
2310
2311SV *
2312has_cctx (Coro::State coro)
2313 PROTOTYPE: $
2314 CODE:
2315 RETVAL = boolSV (!!coro->cctx);
2316 OUTPUT:
2317 RETVAL
2318
2319int
2320is_traced (Coro::State coro)
2321 PROTOTYPE: $
2322 CODE:
2323 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2324 OUTPUT:
2325 RETVAL
2326
2327UV
2328rss (Coro::State coro)
2329 PROTOTYPE: $
2330 ALIAS:
2331 usecount = 1
2332 CODE:
2333 switch (ix)
2334 {
2335 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2336 case 1: RETVAL = coro->usecount; break;
1029 0 2337 }
2338 OUTPUT:
2339 RETVAL
2340
2341void
2342force_cctx ()
2343 PROTOTYPE:
2344 CODE:
2345 struct coro *coro = SvSTATE (coro_current);
2346 coro->cctx->idle_sp = 0;
2347
2348void
2349swap_defsv (Coro::State self)
2350 PROTOTYPE: $
2351 ALIAS:
2352 swap_defav = 1
2353 CODE:
2354 if (!self->slot)
2355 croak ("cannot swap state with coroutine that has no saved state,");
2356 else
1030 ); 2357 {
2358 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2359 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1031 2360
1032 /* set up @_ -- ugly */ 2361 SV *tmp = *src; *src = *dst; *dst = tmp;
1033 av_clear (defav); 2362 }
1034 av_fill (defav, items - 1);
1035 while (items--)
1036 av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038 sv = av_pop ((AV *)SvRV (yieldstack));
1039 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041 SvREFCNT_dec (sv);
1042
1043 transfer (aTHX_ prev, next, 0);
1044 2363
1045MODULE = Coro::State PACKAGE = Coro 2364MODULE = Coro::State PACKAGE = Coro
1046 2365
1047# this is slightly dirty (should expose a c-level api)
1048
1049BOOT: 2366BOOT:
1050{ 2367{
1051 int i; 2368 int i;
2369
2370 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2371 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2372 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2373
2374 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2375 SvREADONLY_on (coro_current);
2376
1052 HV *stash = gv_stashpv ("Coro", TRUE); 2377 coro_stash = gv_stashpv ("Coro", TRUE);
1053 2378
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2379 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2380 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2381 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2382 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2383 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2384 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063 2385
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2386 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV (); 2387 coro_ready[i] = newAV ();
1066 2388
1067 { 2389 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 2390 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1069 2391
1070 coroapi.schedule = api_schedule; 2392 coroapi.schedule = api_schedule;
1071 coroapi.cede = api_cede; 2393 coroapi.cede = api_cede;
2394 coroapi.cede_notself = api_cede_notself;
1072 coroapi.ready = api_ready; 2395 coroapi.ready = api_ready;
2396 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 2397 coroapi.nready = coro_nready;
1074 coroapi.current = coro_current; 2398 coroapi.current = coro_current;
1075 2399
1076 GCoroAPI = &coroapi; 2400 GCoroAPI = &coroapi;
1077 sv_setiv(sv, (IV)&coroapi); 2401 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on(sv); 2402 SvREADONLY_on (sv);
1079 } 2403 }
1080} 2404}
1081 2405
1082#if !PERL_MICRO
1083
1084void 2406void
1085ready(self) 2407schedule (...)
1086 SV * self 2408 CODE:
2409 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2410
2411void
2412cede (...)
2413 CODE:
2414 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2415
2416void
2417cede_notself (...)
2418 CODE:
2419 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2420
2421void
2422_set_current (SV *current)
1087 PROTOTYPE: $ 2423 PROTOTYPE: $
1088 CODE: 2424 CODE:
1089 api_ready (self); 2425 SvREFCNT_dec (SvRV (coro_current));
2426 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1090 2427
1091#endif 2428void
2429_set_readyhook (SV *hook)
2430 PROTOTYPE: $
2431 CODE:
2432 LOCK;
2433 SvREFCNT_dec (coro_readyhook);
2434 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2435 UNLOCK;
1092 2436
1093int 2437int
2438prio (Coro::State coro, int newprio = 0)
2439 PROTOTYPE: $;$
2440 ALIAS:
2441 nice = 1
2442 CODE:
2443{
2444 RETVAL = coro->prio;
2445
2446 if (items > 1)
2447 {
2448 if (ix)
2449 newprio = coro->prio - newprio;
2450
2451 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2452 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2453
2454 coro->prio = newprio;
2455 }
2456}
2457 OUTPUT:
2458 RETVAL
2459
2460SV *
2461ready (SV *self)
2462 PROTOTYPE: $
2463 CODE:
2464 RETVAL = boolSV (api_ready (aTHX_ self));
2465 OUTPUT:
2466 RETVAL
2467
2468int
1094nready(...) 2469nready (...)
1095 PROTOTYPE: 2470 PROTOTYPE:
1096 CODE: 2471 CODE:
1097 RETVAL = coro_nready; 2472 RETVAL = coro_nready;
1098 OUTPUT: 2473 OUTPUT:
1099 RETVAL 2474 RETVAL
1100 2475
2476# for async_pool speedup
1101void 2477void
1102schedule(...) 2478_pool_1 (SV *cb)
1103 PROTOTYPE:
1104 CODE: 2479 CODE:
1105 api_schedule (); 2480{
2481 struct coro *coro = SvSTATE (coro_current);
2482 HV *hv = (HV *)SvRV (coro_current);
2483 AV *defav = GvAV (PL_defgv);
2484 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2485 AV *invoke_av;
2486 int i, len;
2487
2488 if (!invoke)
2489 {
2490 SV *old = PL_diehook;
2491 PL_diehook = 0;
2492 SvREFCNT_dec (old);
2493 croak ("\3async_pool terminate\2\n");
2494 }
2495
2496 SvREFCNT_dec (coro->saved_deffh);
2497 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2498
2499 hv_store (hv, "desc", sizeof ("desc") - 1,
2500 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2501
2502 invoke_av = (AV *)SvRV (invoke);
2503 len = av_len (invoke_av);
2504
2505 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2506
2507 if (len > 0)
2508 {
2509 av_fill (defav, len - 1);
2510 for (i = 0; i < len; ++i)
2511 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2512 }
2513}
1106 2514
1107void 2515void
1108cede(...) 2516_pool_2 (SV *cb)
1109 PROTOTYPE:
1110 CODE: 2517 CODE:
2518{
2519 struct coro *coro = SvSTATE (coro_current);
2520
2521 sv_setsv (cb, &PL_sv_undef);
2522
2523 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2524 coro->saved_deffh = 0;
2525
2526 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2527 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 av_clear (GvAV (PL_defgv));
2536 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2537 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2538
2539 coro->prio = 0;
2540
2541 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2542 api_trace (aTHX_ coro_current, 0);
2543
2544 av_push (av_async_pool, newSVsv (coro_current));
2545}
2546
2547
2548MODULE = Coro::State PACKAGE = Coro::AIO
2549
2550void
2551_get_state (SV *self)
2552 PROTOTYPE: $
2553 PPCODE:
2554{
2555 AV *defav = GvAV (PL_defgv);
2556 AV *av = newAV ();
2557 int i;
2558 SV *data_sv = newSV (sizeof (struct io_state));
2559 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2560 SvCUR_set (data_sv, sizeof (struct io_state));
2561 SvPOK_only (data_sv);
2562
2563 data->errorno = errno;
2564 data->laststype = PL_laststype;
2565 data->laststatval = PL_laststatval;
2566 data->statcache = PL_statcache;
2567
2568 av_extend (av, AvFILLp (defav) + 1 + 1);
2569
2570 for (i = 0; i <= AvFILLp (defav); ++i)
2571 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2572
2573 av_push (av, data_sv);
2574
2575 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2576
2577 api_ready (aTHX_ self);
2578}
2579
2580void
2581_set_state (SV *state)
2582 PROTOTYPE: $
2583 PPCODE:
2584{
2585 AV *av = (AV *)SvRV (state);
2586 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2587 int i;
2588
2589 errno = data->errorno;
2590 PL_laststype = data->laststype;
2591 PL_laststatval = data->laststatval;
2592 PL_statcache = data->statcache;
2593
2594 EXTEND (SP, AvFILLp (av));
2595 for (i = 0; i < AvFILLp (av); ++i)
2596 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2597}
2598
2599
2600MODULE = Coro::State PACKAGE = Coro::AnyEvent
2601
2602BOOT:
2603 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2604
2605void
2606_schedule (...)
2607 CODE:
2608{
2609 static int incede;
2610
1111 api_cede (); 2611 api_cede_notself (aTHX);
1112 2612
1113# and these are hacks 2613 ++incede;
2614 while (coro_nready >= incede && api_cede (aTHX))
2615 ;
2616
2617 sv_setsv (sv_activity, &PL_sv_undef);
2618 if (coro_nready >= incede)
2619 {
2620 PUSHMARK (SP);
2621 PUTBACK;
2622 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2623 SPAGAIN;
2624 }
2625
2626 --incede;
2627}
2628
2629
2630MODULE = Coro::State PACKAGE = PerlIO::cede
2631
2632BOOT:
2633 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2634
2635MODULE = Coro::State PACKAGE = Coro::Semaphore
2636
1114SV * 2637SV *
1115_aio_get_state () 2638new (SV *klass, SV *count_ = 0)
1116 CODE: 2639 CODE:
1117{ 2640{
1118 struct { 2641 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1119 int errorno; 2642 AV *av = newAV ();
1120 int laststype; 2643 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1121 int laststatval; 2644 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1122 Stat_t statcache;
1123 } data;
1124
1125 data.errorno = errno;
1126 data.laststype = PL_laststype;
1127 data.laststatval = PL_laststatval;
1128 data.statcache = PL_statcache;
1129
1130 RETVAL = newSVpvn ((char *)&data, sizeof data);
1131} 2645}
1132 OUTPUT: 2646 OUTPUT:
1133 RETVAL 2647 RETVAL
1134 2648
2649SV *
2650count (SV *self)
2651 CODE:
2652 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2653 OUTPUT:
2654 RETVAL
2655
1135void 2656void
1136_aio_set_state (char *data_) 2657up (SV *self, int adjust = 1)
1137 PROTOTYPE: $ 2658 ALIAS:
2659 adjust = 1
2660 CODE:
2661{
2662 AV *av = (AV *)SvRV (self);
2663 SV *count_sv = AvARRAY (av)[0];
2664 IV count = SvIVX (count_sv);
2665
2666 count += ix ? adjust : 1;
2667 SvIVX (count_sv) = count;
2668
2669 /* now wake up as many waiters as possible */
2670 while (count > 0 && AvFILLp (av) >= count)
2671 {
2672 SV *cb;
2673
2674 /* swap first two elements so we can shift a waiter */
2675 AvARRAY (av)[0] = AvARRAY (av)[1];
2676 AvARRAY (av)[1] = count_sv;
2677 cb = av_shift (av);
2678
2679 if (SvOBJECT (cb))
2680 api_ready (aTHX_ cb);
2681 else
2682 croak ("callbacks not yet supported");
2683
2684 SvREFCNT_dec (cb);
2685 }
2686}
2687
2688void
2689down (SV *self)
2690 CODE:
2691 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2692
2693void
2694try (SV *self)
2695 PPCODE:
2696{
2697 AV *av = (AV *)SvRV (self);
2698 SV *count_sv = AvARRAY (av)[0];
2699 IV count = SvIVX (count_sv);
2700
2701 if (count > 0)
2702 {
2703 --count;
2704 SvIVX (count_sv) = count;
2705 XSRETURN_YES;
2706 }
2707 else
2708 XSRETURN_NO;
2709}
2710
2711void
2712waiters (SV *self)
1138 CODE: 2713 CODE:
1139{ 2714{
1140 struct { 2715 AV *av = (AV *)SvRV (self);
2716
2717 if (GIMME_V == G_SCALAR)
2718 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2719 else
2720 {
1141 int errorno; 2721 int i;
1142 int laststype; 2722 EXTEND (SP, AvFILLp (av) + 1 - 1);
1143 int laststatval; 2723 for (i = 1; i <= AvFILLp (av); ++i)
1144 Stat_t statcache; 2724 PUSHs (newSVsv (AvARRAY (av)[i]));
1145 } *data = (void *)data_; 2725 }
1146
1147 errno = data->errorno;
1148 PL_laststype = data->laststype;
1149 PL_laststatval = data->laststatval;
1150 PL_statcache = data->statcache;
1151} 2726}
2727

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