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Comparing Coro/Coro/State.xs (file contents):
Revision 1.98 by root, Sun Nov 26 21:25:53 2006 UTC vs.
Revision 1.281 by root, Sun Nov 16 10:12:38 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#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)
10# ifndef PL_ppaddr 63# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
12# endif 65# endif
13# ifndef call_sv 66# ifndef call_sv
14# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 78# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
27# endif 80# endif
28#endif 81#endif
29 82
30#include <stdio.h> 83/* 5.11 */
31#include <errno.h> 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
32 105
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34# undef STACKGUARD 107# undef CORO_STACKGUARD
35#endif 108#endif
36 109
37#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
38# define STACKGUARD 0 111# define CORO_STACKGUARD 0
39#endif
40
41#ifdef HAVE_MMAP
42# include <unistd.h>
43# include <sys/mman.h>
44# ifndef MAP_ANONYMOUS
45# ifdef MAP_ANON
46# define MAP_ANONYMOUS MAP_ANON
47# else
48# undef HAVE_MMAP
49# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147# if CORO_PTHREAD
148static void *coro_thx;
50# endif 149# endif
51# include <limits.h>
52# ifndef PAGESIZE
53# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize;
56# else
57# define BOOT_PAGESIZE
58# endif 150#endif
59#endif
60 151
61/* The next macro should declare a variable stacklevel that contains and approximation 152/* helper storage struct for Coro::AIO */
62 * to the current C stack pointer. Its property is that it changes with each call 153struct io_state
63 * and should be unique. */ 154{
64#define dSTACKLEVEL int stacklevel 155 AV *res;
65#define STACKLEVEL ((void *)&stacklevel) 156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
66 161
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 162static double (*nvtime)(); /* so why doesn't it take void? */
68 163
69#include "CoroAPI.h" 164static U32 cctx_gen;
70 165static size_t cctx_stacksize = CORO_STACKSIZE;
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif
81
82static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
83static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
84static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
172
173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
186
187static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle;
189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
86 198
87/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 200typedef struct coro_cctx
201{
89 struct coro_stack *next; 202 struct coro_cctx *next;
90 203
91 /* the stack */ 204 /* the stack */
92 void *sptr; 205 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
94 207
95 /* cpu state */ 208 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97 JMPENV *top_env; 211 JMPENV *top_env;
98 coro_context cctx; 212 coro_context cctx;
99} coro_stack; 213
214 U32 gen;
215#if CORO_USE_VALGRIND
216 int valgrind_id;
217#endif
218 unsigned char flags;
219} coro_cctx;
220
221enum {
222 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
226};
227
228/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct
230{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
100 241
101/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
102struct coro { 243struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 245 coro_cctx *cctx;
105 246
106 /* data associated with this coroutine (initial args) */ 247 /* process data */
107 AV *args; 248 struct CoroSLF slf_frame; /* saved slf frame */
108 int refcnt;
109
110 /* optionally saved, might be zero */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 249 AV *mainstack;
123 SV **stack_sp; 250 perl_slots *slot; /* basically the saved sp */
124 OP *op; 251
125 SV **curpad; 252 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 253 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 254 int flags; /* CF_ flags */
128 SV **stack_base; 255 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 256 void (*on_destroy)(pTHX_ struct coro *coro);
130 SV **tmps_stack; 257
131 I32 tmps_floor; 258 /* statistics */
132 I32 tmps_ix; 259 int usecount; /* number of transfers to this coro */
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 260
149 /* coro process data */ 261 /* coro process data */
150 int prio; 262 int prio;
263 SV *throw; /* exception to be thrown */
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
151}; 270};
152 271
153typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
155 274
275static struct CoroSLF slf_frame; /* the current slf frame */
276
277/** Coro ********************************************************************/
278
279#define PRIO_MAX 3
280#define PRIO_HIGH 1
281#define PRIO_NORMAL 0
282#define PRIO_LOW -1
283#define PRIO_IDLE -3
284#define PRIO_MIN -4
285
286/* for Coro.pm */
287static SV *coro_current;
288static SV *coro_readyhook;
289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** lowlevel stuff **********************************************************/
294
295static SV *
296coro_get_sv (pTHX_ const char *name, int create)
297{
298#if PERL_VERSION_ATLEAST (5,10,0)
299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
300 get_sv (name, create);
301#endif
302 return get_sv (name, create);
303}
304
156static AV * 305static AV *
306coro_get_av (pTHX_ const char *name, int create)
307{
308#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create);
311#endif
312 return get_av (name, create);
313}
314
315static HV *
316coro_get_hv (pTHX_ const char *name, int create)
317{
318#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create);
321#endif
322 return get_hv (name, create);
323}
324
325static AV *
157coro_clone_padlist (CV *cv) 326coro_clone_padlist (pTHX_ CV *cv)
158{ 327{
159 AV *padlist = CvPADLIST (cv); 328 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 329 AV *newpadlist, *newpad;
161 330
162 newpadlist = newAV (); 331 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 332 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 333#if PERL_VERSION_ATLEAST (5,10,0)
334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
335#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 337#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 339 --AvFILLp (padlist);
171 340
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
174 343
175 return newpadlist; 344 return newpadlist;
176} 345}
177 346
178static void 347static void
179free_padlist (AV *padlist) 348free_padlist (pTHX_ AV *padlist)
180{ 349{
181 /* may be during global destruction */ 350 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 351 if (SvREFCNT (padlist))
183 { 352 {
184 I32 i = AvFILLp (padlist); 353 I32 i = AvFILLp (padlist);
… …
205 AV *padlist; 374 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 375 AV *av = (AV *)mg->mg_obj;
207 376
208 /* casting is fun. */ 377 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 379 free_padlist (aTHX_ padlist);
211 380
212 SvREFCNT_dec (av); 381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 382
214 return 0; 383 return 0;
215} 384}
216 385
217#define PERL_MAGIC_coro PERL_MAGIC_ext 386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
218 388
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 389static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0,
391 coro_cv_free
392};
393
394#define CORO_MAGIC(sv, type) \
395 expect_true (SvMAGIC (sv)) \
396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
397 ? SvMAGIC (sv) \
398 : mg_find (sv, type) \
399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
406{
407 HV *stash;
408 MAGIC *mg;
409
410 if (SvROK (coro))
411 coro = SvRV (coro);
412
413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
414 croak ("Coro::State object required");
415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
220 442
221/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
222static void 444static void
223get_padlist (CV *cv) 445get_padlist (pTHX_ CV *cv)
224{ 446{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
226 449
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 452 else
230 { 453 {
231#if 0 454#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 457 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 458 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 459 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 460 SvREFCNT_dec (cp);
237#else 461#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239#endif 463#endif
240 } 464 }
241} 465}
242 466
243static void 467static void
244put_padlist (CV *cv) 468put_padlist (pTHX_ CV *cv)
245{ 469{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
247 472
248 if (!mg) 473 if (expect_false (!mg))
249 { 474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 475
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 476 av = (AV *)mg->mg_obj;
257}
258 477
259#define SB do { 478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 479 av_extend (av, AvMAX (av) + 1);
261 480
262#define LOAD(state) load_state((state)); 481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 482}
264 483
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 484/** load & save, init *******************************************************/
266 485
267static void 486static void
268load_state(Coro__State c) 487load_perl (pTHX_ Coro__State c)
269{ 488{
270 PL_dowarn = c->dowarn; 489 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 490 c->slot = 0;
272 491
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 492 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 493
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 494 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 495 GvAV (PL_defgv) = slot->defav;
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
307 502
308 { 503 {
309 dSP; 504 dSP;
505
310 CV *cv; 506 CV *cv;
311 507
312 /* now do the ugly restore mess */ 508 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 509 while (expect_true (cv = (CV *)POPs))
314 { 510 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 511 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 512 CvDEPTH (cv) = PTR2IV (POPs);
321 } 513 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 514 }
325 515
326 PUTBACK; 516 PUTBACK;
327 } 517 }
328}
329 518
519 slf_frame = c->slf_frame;
520}
521
330static void 522static void
331save_state(Coro__State c, int flags) 523save_perl (pTHX_ Coro__State c)
332{ 524{
525 c->slf_frame = slf_frame;
526
333 { 527 {
334 dSP; 528 dSP;
335 I32 cxix = cxstack_ix; 529 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 530 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 531 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 533 /*
340 * the worst thing you can imagine happens first - we have to save 534 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 535 * (and reinitialize) all cv's in the whole callchain :(
342 */ 536 */
343 537
344 PUSHs (Nullsv); 538 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 539 /* this loop was inspired by pp_caller */
346 for (;;) 540 for (;;)
347 { 541 {
348 while (cxix >= 0) 542 while (expect_true (cxix >= 0))
349 { 543 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 544 PERL_CONTEXT *cx = &ccstk[cxix--];
351 545
352 if (CxTYPE(cx) == CXt_SUB) 546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
353 { 547 {
354 CV *cv = cx->blk_sub.cv; 548 CV *cv = cx->blk_sub.cv;
549
355 if (CvDEPTH(cv)) 550 if (expect_true (CvDEPTH (cv)))
356 { 551 {
357 EXTEND (SP, CvDEPTH(cv)*2); 552 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 553 PUSHs ((SV *)CvPADLIST (cv));
554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 555 PUSHs ((SV *)cv);
368 556
557 CvDEPTH (cv) = 0;
369 get_padlist (cv); 558 get_padlist (aTHX_ cv);
370 } 559 }
371 } 560 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 561 }
381 562
382 if (top_si->si_type == PERLSI_MAIN) 563 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 564 break;
384 565
385 top_si = top_si->si_prev; 566 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 567 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 568 cxix = top_si->si_cxix;
388 } 569 }
389 570
390 PUTBACK; 571 PUTBACK;
391 } 572 }
392 573
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 574 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 575 /* we manually unroll here, as usually 2 slots is enough */
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 576 if (SLOT_COUNT >= 1) CXINC;
577 if (SLOT_COUNT >= 2) CXINC;
578 if (SLOT_COUNT >= 3) CXINC;
579 {
580 int i;
581 for (i = 3; i < SLOT_COUNT; ++i)
582 CXINC;
583 }
584 cxstack_ix -= SLOT_COUNT; /* undo allocation */
396 585
397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
399
400 c->curstackinfo = PL_curstackinfo;
401 c->curstack = PL_curstack;
402 c->mainstack = PL_mainstack; 586 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 587
404 c->op = PL_op; 588 {
405 c->curpad = PL_curpad; 589 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 590
407 c->compcv = PL_compcv; 591 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 592 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 593 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 594 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 595
412 c->tmps_ix = PL_tmps_ix; 596 #define VAR(name,type) slot->name = PL_ ## name;
413 c->tmps_max = PL_tmps_max; 597 # include "state.h"
414 c->markstack = PL_markstack; 598 #undef VAR
415 c->markstack_ptr = PL_markstack_ptr; 599 }
416 c->markstack_max = PL_markstack_max;
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
429 c->curcop = PL_curcop;
430} 600}
431 601
432/* 602/*
433 * allocate various perl stacks. This is an exact copy 603 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 604 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 605 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 606 * not usually need a lot of stackspace.
437 */ 607 */
608#if CORO_PREFER_PERL_FUNCTIONS
609# define coro_init_stacks init_stacks
610#else
438static void 611static void
439coro_init_stacks () 612coro_init_stacks (pTHX)
440{ 613{
441 LOCK; 614 PL_curstackinfo = new_stackinfo(32, 8);
442
443 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
444 PL_curstackinfo->si_type = PERLSI_MAIN; 615 PL_curstackinfo->si_type = PERLSI_MAIN;
445 PL_curstack = PL_curstackinfo->si_stack; 616 PL_curstack = PL_curstackinfo->si_stack;
446 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
447 618
448 PL_stack_base = AvARRAY(PL_curstack); 619 PL_stack_base = AvARRAY(PL_curstack);
449 PL_stack_sp = PL_stack_base; 620 PL_stack_sp = PL_stack_base;
450 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
451 622
452 New(50,PL_tmps_stack,96,SV*); 623 New(50,PL_tmps_stack,32,SV*);
453 PL_tmps_floor = -1; 624 PL_tmps_floor = -1;
454 PL_tmps_ix = -1; 625 PL_tmps_ix = -1;
455 PL_tmps_max = 96; 626 PL_tmps_max = 32;
456 627
457 New(54,PL_markstack,16,I32); 628 New(54,PL_markstack,16,I32);
458 PL_markstack_ptr = PL_markstack; 629 PL_markstack_ptr = PL_markstack;
459 PL_markstack_max = PL_markstack + 16; 630 PL_markstack_max = PL_markstack + 16;
460 631
461#ifdef SET_MARK_OFFSET 632#ifdef SET_MARK_OFFSET
462 SET_MARK_OFFSET; 633 SET_MARK_OFFSET;
463#endif 634#endif
464 635
465 New(54,PL_scopestack,16,I32); 636 New(54,PL_scopestack,8,I32);
466 PL_scopestack_ix = 0; 637 PL_scopestack_ix = 0;
467 PL_scopestack_max = 16; 638 PL_scopestack_max = 8;
468 639
469 New(54,PL_savestack,96,ANY); 640 New(54,PL_savestack,24,ANY);
470 PL_savestack_ix = 0; 641 PL_savestack_ix = 0;
471 PL_savestack_max = 96; 642 PL_savestack_max = 24;
472 643
473#if PERL_VERSION < 9 644#if !PERL_VERSION_ATLEAST (5,10,0)
474 New(54,PL_retstack,8,OP*); 645 New(54,PL_retstack,4,OP*);
475 PL_retstack_ix = 0; 646 PL_retstack_ix = 0;
476 PL_retstack_max = 8; 647 PL_retstack_max = 4;
477#endif 648#endif
478
479 UNLOCK;
480} 649}
650#endif
481 651
482/* 652/*
483 * destroy the stacks, the callchain etc... 653 * destroy the stacks, the callchain etc...
484 */ 654 */
485static void 655static void
486destroy_stacks() 656coro_destruct_stacks (pTHX)
487{ 657{
488 if (!IN_DESTRUCT)
489 {
490 /* is this ugly, I ask? */
491 LEAVE_SCOPE (0);
492
493 /* sure it is, but more important: is it correct?? :/ */
494 FREETMPS;
495
496 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
497 }
498
499 while (PL_curstackinfo->si_next) 658 while (PL_curstackinfo->si_next)
500 PL_curstackinfo = PL_curstackinfo->si_next; 659 PL_curstackinfo = PL_curstackinfo->si_next;
501 660
502 while (PL_curstackinfo) 661 while (PL_curstackinfo)
503 { 662 {
504 PERL_SI *p = PL_curstackinfo->si_prev; 663 PERL_SI *p = PL_curstackinfo->si_prev;
505 664
506 { /*D*//*remove*/
507 dSP;
508 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
509 PUTBACK; /* possibly superfluous */
510 }
511
512 if (!IN_DESTRUCT) 665 if (!IN_DESTRUCT)
513 {
514 dounwind (-1);/*D*//*remove*/
515 SvREFCNT_dec (PL_curstackinfo->si_stack); 666 SvREFCNT_dec (PL_curstackinfo->si_stack);
516 }
517 667
518 Safefree (PL_curstackinfo->si_cxstack); 668 Safefree (PL_curstackinfo->si_cxstack);
519 Safefree (PL_curstackinfo); 669 Safefree (PL_curstackinfo);
520 PL_curstackinfo = p; 670 PL_curstackinfo = p;
521 } 671 }
522 672
523 Safefree (PL_tmps_stack); 673 Safefree (PL_tmps_stack);
524 Safefree (PL_markstack); 674 Safefree (PL_markstack);
525 Safefree (PL_scopestack); 675 Safefree (PL_scopestack);
526 Safefree (PL_savestack); 676 Safefree (PL_savestack);
527#if PERL_VERSION < 9 677#if !PERL_VERSION_ATLEAST (5,10,0)
528 Safefree (PL_retstack); 678 Safefree (PL_retstack);
529#endif 679#endif
530} 680}
531 681
682static size_t
683coro_rss (pTHX_ struct coro *coro)
684{
685 size_t rss = sizeof (*coro);
686
687 if (coro->mainstack)
688 {
689 perl_slots tmp_slot;
690 perl_slots *slot;
691
692 if (coro->flags & CF_RUNNING)
693 {
694 slot = &tmp_slot;
695
696 #define VAR(name,type) slot->name = PL_ ## name;
697 # include "state.h"
698 #undef VAR
699 }
700 else
701 slot = coro->slot;
702
703 if (slot)
704 {
705 rss += sizeof (slot->curstackinfo);
706 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
708 rss += slot->tmps_max * sizeof (SV *);
709 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
710 rss += slot->scopestack_max * sizeof (I32);
711 rss += slot->savestack_max * sizeof (ANY);
712
713#if !PERL_VERSION_ATLEAST (5,10,0)
714 rss += slot->retstack_max * sizeof (OP *);
715#endif
716 }
717 }
718
719 return rss;
720}
721
722/** coroutine stack handling ************************************************/
723
724static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
727
728/* apparently < 5.8.8 */
729#ifndef MgPV_nolen_const
730#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
731 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
732 (const char*)(mg)->mg_ptr)
733#endif
734
735/*
736 * This overrides the default magic get method of %SIG elements.
737 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
738 * and instead of tryign to save and restore the hash elements, we just provide
739 * readback here.
740 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
741 * not expecting this to actually change the hook. This is a potential problem
742 * when a schedule happens then, but we ignore this.
743 */
532static void 744static int
533setup_coro (struct coro *coro) 745coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
746{
747 const char *s = MgPV_nolen_const (mg);
748
749 if (*s == '_')
750 {
751 SV **svp = 0;
752
753 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
754 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
755
756 if (svp)
757 {
758 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
759 return 0;
760 }
761 }
762
763 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
764}
765
766static int
767coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 SV *old = *svp;
781 *svp = 0;
782 SvREFCNT_dec (old);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = newSVsv (sv);
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
812}
813
814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
828coro_setup (pTHX_ struct coro *coro)
534{ 829{
535 /* 830 /*
536 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
537 */ 832 */
538 dTHX; 833 coro_init_stacks (aTHX);
834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880}
881
882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
903 SvREFCNT_dec (GvAV (PL_defgv));
904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
914
915 coro_destruct_stacks (aTHX);
916}
917
918INLINE void
919free_coro_mortal (pTHX)
920{
921 if (expect_true (coro_mortal))
922 {
923 SvREFCNT_dec (coro_mortal);
924 coro_mortal = 0;
925 }
926}
927
928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 {
938 PERL_ASYNC_CHECK ();
939
940 if (cctx->flags & CC_TRACE_ALL)
941 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top;
946 AV *av = newAV (); /* return values */
947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
986 {
987 SV **cb;
988
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
990 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 {
995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
1021 }
1022
1023 if (cctx->flags & CC_TRACE_LINE)
1024 {
1025 dSP;
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PL_runops = RUNOPS_DEFAULT;
1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043 }
1044 }
1045 }
1046 }
1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
1063static void NOINLINE
1064cctx_prepare (pTHX_ coro_cctx *cctx)
1065{
539 dSP; 1066 dSP;
540 UNOP myop; 1067 UNOP myop;
541 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
542 1068
543 coro_init_stacks (); 1069 PL_top_env = &PL_start_env;
544 /*PL_curcop = 0;*/
545 /*PL_in_eval = PL_in_eval;*/ /* inherit */
546 SvREFCNT_dec (GvAV (PL_defgv));
547 GvAV (PL_defgv) = coro->args; coro->args = 0;
548 1070
549 SPAGAIN; 1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
550 1073
551 Zero (&myop, 1, UNOP); 1074 Zero (&myop, 1, UNOP);
552 myop.op_next = Nullop; 1075 myop.op_next = PL_op;
553 myop.op_flags = OPf_WANT_VOID; 1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
554 1077
1078 PUSHMARK (SP);
1079 EXTEND (SP, 2);
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1082 PUTBACK;
555 PL_op = (OP *)&myop; 1083 PL_op = (OP *)&myop;
556
557 PUSHMARK(SP);
558 XPUSHs (sub_init);
559 PUTBACK;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN; 1085 SPAGAIN;
562
563 ENTER; /* necessary e.g. for dounwind */
564} 1086}
565 1087
566static void 1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
1090transfer_tail (pTHX)
1091{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
567free_coro_mortal () 1096 free_coro_mortal (aTHX);
568{ 1097
569 if (coro_mortal) 1098 if (expect_false (next->throw))
570 {
571 SvREFCNT_dec (coro_mortal);
572 coro_mortal = 0;
573 } 1099 {
574} 1100 SV *exception = sv_2mortal (next->throw);
575 1101
576static void 1102 next->throw = 0;
577coro_run (void *arg) 1103 sv_setsv (ERRSV, exception);
578{ 1104 croak (0);
579 /* 1105 }
1106}
1107
1108/*
580 * this is a _very_ stripped down perl interpreter ;) 1109 * this is a _very_ stripped down perl interpreter ;)
581 */ 1110 */
1111static void
1112cctx_run (void *arg)
1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
582 dTHX; 1120 dTHX;
583 int ret;
584 1121
585 UNLOCK; 1122 /* normally we would need to skip the entersub here */
1123 /* not doing so will re-execute it, which is exactly what we want */
1124 /* PL_nop = PL_nop->op_next */
586 1125
587 PL_top_env = &PL_start_env; 1126 /* inject a fake subroutine call to cctx_init */
1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
588 1128
589 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1129 /* cctx_run is the alternative tail of transfer() */
590 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1130 /* TODO: throwing an exception here might be deadly, VERIFY */
1131 transfer_tail (aTHX);
591 1132
592 /* continue at cctx_init, without entersub */
593 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
594
595 /* somebody will hit me for both perl_run and PL_restartop */ 1133 /* somebody or something will hit me for both perl_run and PL_restartop */
596 ret = perl_run (PERL_GET_CONTEXT); 1134 PL_restartop = PL_op;
597 printf ("ret %d\n", ret);//D 1135 perl_run (PL_curinterp);
598 1136
599 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1137 /*
600 abort (); 1138 * If perl-run returns we assume exit() was being called or the coro
1139 * fell off the end, which seems to be the only valid (non-bug)
1140 * reason for perl_run to return. We try to exit by jumping to the
1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1142 * coroutine as Coro has no such concept
1143 */
1144 PL_top_env = main_top_env;
1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
601} 1147}
602 1148
603static coro_stack * 1149static coro_cctx *
604stack_new () 1150cctx_new ()
605{ 1151{
606 coro_stack *stack; 1152 coro_cctx *cctx;
607 1153
1154 ++cctx_count;
608 New (0, stack, 1, coro_stack); 1155 New (0, cctx, 1, coro_cctx);
1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1181 void *stack_start;
1182 size_t stack_size;
609 1183
610#if HAVE_MMAP 1184#if HAVE_MMAP
611
612 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
613 /* mmap suppsedly does allocate-on-write for us */ 1186 /* mmap supposedly does allocate-on-write for us */
614 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
615 1188
616 if (stack->sptr == (void *)-1) 1189 if (cctx->sptr != (void *)-1)
1190 {
1191 #if CORO_STACKGUARD
1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1193 #endif
1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1196 cctx->flags |= CC_MAPPED;
617 { 1197 }
1198 else
1199#endif
1200 {
1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1202 New (0, cctx->sptr, cctx_stacksize, long);
1203
1204 if (!cctx->sptr)
1205 {
618 perror ("FATAL: unable to mmap stack for coroutine"); 1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
619 _exit (EXIT_FAILURE); 1207 _exit (EXIT_FAILURE);
620 } 1208 }
621 1209
622# if STACKGUARD 1210 stack_start = cctx->sptr;
623 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1211 stack_size = cctx->ssize;
624# endif
625
626#else
627
628 stack->ssize = STACKSIZE * (long)sizeof (long);
629 New (0, stack->sptr, STACKSIZE, long);
630
631 if (!stack->sptr)
632 { 1212 }
633 perror (stderr, "FATAL: unable to malloc stack for coroutine");
634 _exit (EXIT_FAILURE);
635 }
636 1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
637#endif 1216 #endif
638 1217
639 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
640 1219
641 return stack; 1220 return cctx;
642} 1221}
643 1222
644static void 1223static void
645stack_free (coro_stack *stack) 1224cctx_destroy (coro_cctx *cctx)
646{ 1225{
647 if (!stack) 1226 if (!cctx)
648 return; 1227 return;
649 1228
1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
1231
1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1237 #endif
1238
650#if HAVE_MMAP 1239#if HAVE_MMAP
651 munmap (stack->sptr, stack->ssize); 1240 if (cctx->flags & CC_MAPPED)
652#else 1241 munmap (cctx->sptr, cctx->ssize);
1242 else
1243#endif
653 Safefree (stack->sptr); 1244 Safefree (cctx->sptr);
654#endif
655
656 Safefree (stack);
657}
658
659static coro_stack *stack_first;
660
661static coro_stack *
662stack_get ()
663{
664 coro_stack *stack;
665
666 if (stack_first)
667 {
668 stack = stack_first;
669 stack_first = stack->next;
670 }
671 else
672 {
673 stack = stack_new ();
674 PL_op = PL_op->op_next;
675 } 1245 }
676 1246
677 return stack; 1247 Safefree (cctx);
678} 1248}
679 1249
680static void 1250/* wether this cctx should be destructed */
681stack_put (coro_stack *stack) 1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
682{
683 stack->next = stack_first;
684 stack_first = stack;
685}
686 1252
687/* never call directly, always through the coro_state_transfer global variable */ 1253static coro_cctx *
1254cctx_get (pTHX)
1255{
1256 while (expect_true (cctx_first))
1257 {
1258 coro_cctx *cctx = cctx_first;
1259 cctx_first = cctx->next;
1260 --cctx_idle;
1261
1262 if (expect_true (!CCTX_EXPIRED (cctx)))
1263 return cctx;
1264
1265 cctx_destroy (cctx);
1266 }
1267
1268 return cctx_new_run ();
1269}
1270
688static void 1271static void
1272cctx_put (coro_cctx *cctx)
1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
1276 /* free another cctx if overlimit */
1277 if (expect_false (cctx_idle >= cctx_max_idle))
1278 {
1279 coro_cctx *first = cctx_first;
1280 cctx_first = first->next;
1281 --cctx_idle;
1282
1283 cctx_destroy (first);
1284 }
1285
1286 ++cctx_idle;
1287 cctx->next = cctx_first;
1288 cctx_first = cctx;
1289}
1290
1291/** coroutine switching *****************************************************/
1292
1293static void
1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1295{
1296 if (expect_true (prev != next))
1297 {
1298 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1300
1301 if (expect_false (next->flags & CF_RUNNING))
1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1303
1304 if (expect_false (next->flags & CF_DESTROYED))
1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1306
1307#if !PERL_VERSION_ATLEAST (5,10,0)
1308 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1310#endif
1311 }
1312}
1313
1314/* always use the TRANSFER macro */
1315static void NOINLINE
689transfer_impl (struct coro *prev, struct coro *next, int flags) 1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
690{ 1317{
691 dSTACKLEVEL; 1318 dSTACKLEVEL;
692 1319
693 /* sometimes transfer is only called to set idle_sp */ 1320 /* sometimes transfer is only called to set idle_sp */
694 if (flags == TRANSFER_SET_STACKLEVEL) 1321 if (expect_false (!next))
695 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1322 {
696 else if (prev != next) 1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
697 { 1325 }
1326 else if (expect_true (prev != next))
1327 {
698 coro_stack *prev__stack; 1328 coro_cctx *prev__cctx;
699 1329
700 LOCK; 1330 if (expect_false (prev->flags & CF_NEW))
701
702 if (next->mainstack)
703 { 1331 {
704 /* coroutine already started */ 1332 /* create a new empty/source context */
705 SAVE (prev, flags); 1333 prev->cctx = cctx_new_empty ();
706 LOAD (next); 1334 prev->flags &= ~CF_NEW;
1335 prev->flags |= CF_RUNNING;
1336 }
1337
1338 prev->flags &= ~CF_RUNNING;
1339 next->flags |= CF_RUNNING;
1340
1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
1343
1344 if (expect_false (next->flags & CF_NEW))
1345 {
1346 /* need to start coroutine */
1347 next->flags &= ~CF_NEW;
1348 /* setup coroutine call */
1349 coro_setup (aTHX_ next);
707 } 1350 }
708 else 1351 else
1352 load_perl (aTHX_ next);
1353
1354 prev__cctx = prev->cctx;
1355
1356 /* possibly untie and reuse the cctx */
1357 if (expect_true (
1358 prev__cctx->idle_sp == (void *)stacklevel
1359 && !(prev__cctx->flags & CC_TRACE)
1360 && !force_cctx
1361 ))
709 { 1362 {
710 /* need to start coroutine */ 1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
711 /* first get rid of the old state */ 1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
712 SAVE (prev, -1); 1365
713 /* setup coroutine call */ 1366 prev->cctx = 0;
714 setup_coro (next); 1367
715 /* need a stack */ 1368 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
716 next->stack = 0; 1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1370 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1371 if (!next->cctx)
1372 next->cctx = cctx_get (aTHX);
1373
1374 cctx_put (prev__cctx);
717 } 1375 }
718 1376
719 if (!prev->stack) 1377 ++next->usecount;
720 /* create a new empty context */
721 Newz (0, prev->stack, 1, coro_stack);
722 1378
723 prev__stack = prev->stack; 1379 if (expect_true (!next->cctx))
1380 next->cctx = cctx_get (aTHX);
724 1381
725 /* possibly "free" the stack */ 1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
726 if (prev__stack->idle_sp == STACKLEVEL) 1383 transfer_next = next;
1384
1385 if (expect_false (prev__cctx != next->cctx))
727 { 1386 {
728 stack_put (prev__stack); 1387 prev__cctx->top_env = PL_top_env;
729 prev->stack = 0; 1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
730 } 1390 }
731 1391
732 if (!next->stack) 1392 transfer_tail (aTHX);
733 next->stack = stack_get ();
734
735 if (prev__stack != next->stack)
736 {
737 prev__stack->top_env = PL_top_env;
738 PL_top_env = next->stack->top_env;
739 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
740 }
741
742 free_coro_mortal ();
743
744 UNLOCK;
745 } 1393 }
746} 1394}
747 1395
748/* use this function pointer to call the above function */ 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
749/* this is done to increase chances of the compiler not inlining the call */ 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
750/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
751void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
752 1398
753struct transfer_args 1399/** high level stuff ********************************************************/
754{
755 struct coro *prev, *next;
756 int flags;
757};
758 1400
759#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
760
761static void 1401static int
762coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
763{ 1403{
764 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
765 return; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
766 1420
767 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
768 { 1422 {
769 struct coro temp; 1423 struct coro temp;
770 1424
771 SAVE ((&temp), TRANSFER_SAVE_ALL); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
772 LOAD (coro);
773 1426
774 destroy_stacks (); 1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
775 1429
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1430 coro_destruct (aTHX_ coro);
777 1431
1432 load_perl (aTHX_ &temp);
1433
778 coro->mainstack = 0; 1434 coro->slot = 0;
779 } 1435 }
780 1436
781 stack_free (coro->stack); 1437 cctx_destroy (coro->cctx);
782 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
783 Safefree (coro); 1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
784} 1445}
785 1446
786static int 1447static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788{ 1449{
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
790 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
791 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
792 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
793 1460
794 return 0; 1461 return 0;
795} 1462}
796 1463
797static int 1464static int
… …
802 ++coro->refcnt; 1469 ++coro->refcnt;
803 1470
804 return 0; 1471 return 0;
805} 1472}
806 1473
807static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
808 1484
809static struct coro *
810SvSTATE (SV *coro)
811{
812 HV *stash;
813 MAGIC *mg;
814
815 if (SvROK (coro))
816 coro = SvRV (coro);
817
818 stash = SvSTASH (coro);
819 if (stash != coro_stash && stash != coro_state_stash)
820 {
821 /* very slow, but rare, check */
822 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
823 croak ("Coro::State object required");
824 }
825
826 mg = SvMAGIC (coro);
827 assert (mg->mg_type == PERL_MAGIC_ext);
828 return (struct coro *)mg->mg_ptr;
829}
830
831static void 1485static void
832prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
833{ 1487{
834 ta->prev = SvSTATE (prev); 1488 ta->prev = SvSTATE (prev_sv);
835 ta->next = SvSTATE (next); 1489 ta->next = SvSTATE (next_sv);
836 ta->flags = flags; 1490 TRANSFER_CHECK (*ta);
837} 1491}
838 1492
839static void 1493static void
840api_transfer (SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
841{ 1495{
842 dTHX;
843 struct transfer_args ta; 1496 struct coro_transfer_args ta;
844 1497
845 prepare_transfer (&ta, prev, next, flags); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
846 TRANSFER (ta); 1499 TRANSFER (ta, 1);
847} 1500}
848 1501
849/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
850 1503
851#define PRIO_MAX 3 1504INLINE void
852#define PRIO_HIGH 1 1505coro_enq (pTHX_ struct coro *coro)
853#define PRIO_NORMAL 0 1506{
854#define PRIO_LOW -1 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
855#define PRIO_IDLE -3 1508}
856#define PRIO_MIN -4
857 1509
858/* for Coro.pm */ 1510INLINE SV *
859static GV *coro_current, *coro_idle; 1511coro_deq (pTHX)
860static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
861static int coro_nready;
862
863static void
864coro_enq (SV *sv)
865{ 1512{
866 int prio; 1513 int prio;
867 1514
868 if (SvTYPE (sv) != SVt_PVHV) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
869 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
870 1518
871 prio = SvSTATE (sv)->prio; 1519 return 0;
1520}
872 1521
873 av_push (coro_ready [prio - PRIO_MIN], sv); 1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
874 coro_nready++; 1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_DISCARD);
1555 SPAGAIN;
1556
1557 FREETMPS;
1558 LEAVE;
1559 }
1560
1561 if (xs_hook)
1562 xs_hook ();
1563
1564 return 1;
1565}
1566
1567static int
1568api_is_ready (pTHX_ SV *coro_sv)
1569{
1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1571}
1572
1573INLINE void
1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1575{
1576 SV *prev_sv, *next_sv;
1577
1578 for (;;)
1579 {
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586
1587 ENTER;
1588 SAVETMPS;
1589
1590 PUSHMARK (SP);
1591 PUTBACK;
1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1594
1595 FREETMPS;
1596 LEAVE;
1597 continue;
1598 }
1599
1600 ta->next = SvSTATE_hv (next_sv);
1601
1602 /* cannot transfer to destroyed coros, skip and look for next */
1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1604 {
1605 SvREFCNT_dec (next_sv);
1606 /* coro_nready has already been taken care of by destroy */
1607 continue;
1608 }
1609
1610 --coro_nready;
1611 break;
1612 }
1613
1614 /* free this only after the transfer */
1615 prev_sv = SvRV (coro_current);
1616 ta->prev = SvSTATE_hv (prev_sv);
1617 TRANSFER_CHECK (*ta);
1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1619 ta->next->flags &= ~CF_READY;
1620 SvRV_set (coro_current, next_sv);
1621
1622 free_coro_mortal (aTHX);
1623 coro_mortal = prev_sv;
1624}
1625
1626INLINE void
1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1628{
1629 api_ready (aTHX_ coro_current);
1630 prepare_schedule (aTHX_ ta);
1631}
1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
1648api_schedule (pTHX)
1649{
1650 struct coro_transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int
1657api_cede (pTHX)
1658{
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
1666 return 1;
1667 }
1668 else
1669 return 0;
1670}
1671
1672static int
1673api_cede_notself (pTHX)
1674{
1675 if (coro_nready)
1676 {
1677 struct coro_transfer_args ta;
1678
1679 prepare_cede_notself (aTHX_ &ta);
1680 TRANSFER (ta, 1);
1681 return 1;
1682 }
1683 else
1684 return 0;
1685}
1686
1687static void
1688api_trace (pTHX_ SV *coro_sv, int flags)
1689{
1690 struct coro *coro = SvSTATE (coro_sv);
1691
1692 if (flags & CC_TRACE)
1693 {
1694 if (!coro->cctx)
1695 coro->cctx = cctx_new_run ();
1696 else if (!(coro->cctx->flags & CC_TRACE))
1697 croak ("cannot enable tracing on coroutine with custom stack,");
1698
1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1700 }
1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1702 {
1703 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1704
1705 if (coro->flags & CF_RUNNING)
1706 PL_runops = RUNOPS_DEFAULT;
1707 else
1708 coro->slot->runops = RUNOPS_DEFAULT;
1709 }
1710}
1711
1712/*****************************************************************************/
1713/* PerlIO::cede */
1714
1715typedef struct
1716{
1717 PerlIOBuf base;
1718 NV next, every;
1719} PerlIOCede;
1720
1721static IV
1722PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1723{
1724 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1725
1726 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1727 self->next = nvtime () + self->every;
1728
1729 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
875} 1730}
876 1731
877static SV * 1732static SV *
878coro_deq (int min_prio) 1733PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
879{ 1734{
880 int prio = PRIO_MAX - PRIO_MIN; 1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
881 1736
882 min_prio -= PRIO_MIN; 1737 return newSVnv (self->every);
883 if (min_prio < 0) 1738}
884 min_prio = 0;
885 1739
886 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1740static IV
887 if (AvFILLp (coro_ready [prio]) >= 0) 1741PerlIOCede_flush (pTHX_ PerlIO *f)
1742{
1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1744 double now = nvtime ();
1745
1746 if (now >= self->next)
1747 {
1748 api_cede (aTHX);
1749 self->next = now + self->every;
1750 }
1751
1752 return PerlIOBuf_flush (aTHX_ f);
1753}
1754
1755static PerlIO_funcs PerlIO_cede =
1756{
1757 sizeof(PerlIO_funcs),
1758 "cede",
1759 sizeof(PerlIOCede),
1760 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1761 PerlIOCede_pushed,
1762 PerlIOBuf_popped,
1763 PerlIOBuf_open,
1764 PerlIOBase_binmode,
1765 PerlIOCede_getarg,
1766 PerlIOBase_fileno,
1767 PerlIOBuf_dup,
1768 PerlIOBuf_read,
1769 PerlIOBuf_unread,
1770 PerlIOBuf_write,
1771 PerlIOBuf_seek,
1772 PerlIOBuf_tell,
1773 PerlIOBuf_close,
1774 PerlIOCede_flush,
1775 PerlIOBuf_fill,
1776 PerlIOBase_eof,
1777 PerlIOBase_error,
1778 PerlIOBase_clearerr,
1779 PerlIOBase_setlinebuf,
1780 PerlIOBuf_get_base,
1781 PerlIOBuf_bufsiz,
1782 PerlIOBuf_get_ptr,
1783 PerlIOBuf_get_cnt,
1784 PerlIOBuf_set_ptrcnt,
1785};
1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
888 { 1943 {
889 coro_nready--; 1944 if (sp == bot)
890 return av_shift (coro_ready [prio]); 1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
891 } 1948 }
892 1949
893 return 0;
894}
895
896static void
897api_ready (SV *coro)
898{
899 dTHX;
900
901 if (SvROK (coro))
902 coro = SvRV (coro);
903
904 LOCK;
905 coro_enq (SvREFCNT_inc (coro));
906 UNLOCK;
907}
908
909static void
910prepare_schedule (struct transfer_args *ta)
911{
912 SV *current, *prev, *next;
913
914 LOCK;
915
916 current = GvSV (coro_current);
917
918 for (;;)
919 {
920 LOCK;
921
922 next = coro_deq (PRIO_MIN);
923
924 if (next)
925 break;
926
927 UNLOCK;
928
929 {
930 dSP;
931
932 ENTER;
933 SAVETMPS;
934
935 PUSHMARK (SP);
936 PUTBACK; 1950 PUTBACK;
937 call_sv (GvSV (coro_idle), G_DISCARD); 1951 }
938 1952
939 FREETMPS; 1953 return NORMAL;
940 LEAVE; 1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, int adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as possible */
2001 while (count > 0 && AvFILLp (av) >= count)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
941 } 2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
2028static int
2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2030{
2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
2033
2034 if (SvIVX (count_sv) > 0)
942 } 2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2038 return 0;
2039 }
2040 else
2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
943 2046
944 prev = SvRV (current); 2047 for (i = 1; i <= AvFILLp (av); ++i)
945 SvRV (current) = next; 2048 if (AvARRAY (av)[i] == SvRV (coro_current))
2049 return 1;
946 2050
947 /* free this only after the transfer */ 2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
948 free_coro_mortal (); 2052 return 1;
949 coro_mortal = prev; 2053 }
950
951 ta->prev = SvSTATE (prev);
952 ta->next = SvSTATE (next);
953 ta->flags = TRANSFER_SAVE_ALL;
954
955 UNLOCK;
956} 2054}
957 2055
958static void 2056static void
959prepare_cede (struct transfer_args *ta) 2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
960{ 2058{
961 LOCK; 2059 AV *av = (AV *)SvRV (arg [0]);
962 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
963 UNLOCK;
964 2060
965 prepare_schedule (ta); 2061 if (SvIVX (AvARRAY (av)[0]) > 0)
966} 2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 }
2066 else
2067 {
2068 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
967 2069
968static void 2070 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
969api_schedule (void) 2071 frame->prepare = prepare_schedule;
970{
971 dTHX;
972 struct transfer_args ta;
973 2072
974 prepare_schedule (&ta); 2073 /* to avoid race conditions when a woken-up coro gets terminated */
975 TRANSFER (ta); 2074 /* we arrange for a temporary on_destroy that calls adjust (0) */
976} 2075 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2076 }
977 2077
978static void 2078 frame->check = slf_check_semaphore_down;
979api_cede (void)
980{
981 dTHX;
982 struct transfer_args ta;
983 2079
984 prepare_cede (&ta);
985 TRANSFER (ta);
986} 2080}
987 2081
2082/*****************************************************************************/
2083
2084#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2085
2086/* create a closure from XS, returns a code reference */
2087/* the arg can be accessed via GENSUB_ARG from the callback */
2088/* the callback must use dXSARGS/XSRETURN */
2089static SV *
2090gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2091{
2092 CV *cv = (CV *)NEWSV (0, 0);
2093
2094 sv_upgrade ((SV *)cv, SVt_PVCV);
2095
2096 CvANON_on (cv);
2097 CvISXSUB_on (cv);
2098 CvXSUB (cv) = xsub;
2099 GENSUB_ARG = arg;
2100
2101 return newRV_noinc ((SV *)cv);
2102}
2103
2104/*****************************************************************************/
2105
988MODULE = Coro::State PACKAGE = Coro::State 2106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
989 2107
990PROTOTYPES: DISABLE 2108PROTOTYPES: DISABLE
991 2109
992BOOT: 2110BOOT:
993{ 2111{
994#ifdef USE_ITHREADS 2112#ifdef USE_ITHREADS
995 MUTEX_INIT (&coro_mutex); 2113# if CORO_PTHREAD
2114 coro_thx = PERL_GET_CONTEXT;
2115# endif
996#endif 2116#endif
997 BOOT_PAGESIZE; 2117 BOOT_PAGESIZE;
998 2118
2119 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2120 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2121
2122 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2123 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2124 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2125
2126 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2127 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2128 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2129
999 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2130 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1000 2131
1001 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2132 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1002 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2133 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1003 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2135 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1004 2136
1005 main_mainstack = PL_mainstack; 2137 main_mainstack = PL_mainstack;
2138 main_top_env = PL_top_env;
1006 2139
2140 while (main_top_env->je_prev)
2141 main_top_env = main_top_env->je_prev;
2142
2143 {
2144 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2145
2146 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2147 hv_store_ent (PL_custom_op_names, slf,
2148 newSVpv ("coro_slf", 0), 0);
2149
2150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2151 hv_store_ent (PL_custom_op_descs, slf,
2152 newSVpv ("coro schedule like function", 0), 0);
2153 }
2154
1007 coroapi.ver = CORO_API_VERSION; 2155 coroapi.ver = CORO_API_VERSION;
2156 coroapi.rev = CORO_API_REVISION;
2157
1008 coroapi.transfer = api_transfer; 2158 coroapi.transfer = api_transfer;
2159
2160 coroapi.sv_state = SvSTATE_;
2161 coroapi.execute_slf = api_execute_slf;
2162 coroapi.prepare_nop = prepare_nop;
2163 coroapi.prepare_schedule = prepare_schedule;
2164 coroapi.prepare_cede = prepare_cede;
2165 coroapi.prepare_cede_notself = prepare_cede_notself;
2166
2167 {
2168 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2169
2170 if (!svp) croak ("Time::HiRes is required");
2171 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2172
2173 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2174 }
1009 2175
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2176 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011} 2177}
1012 2178
1013SV * 2179SV *
1014new (char *klass, ...) 2180new (char *klass, ...)
1015 CODE: 2181 CODE:
1016{ 2182{
1017 struct coro *coro; 2183 struct coro *coro;
2184 MAGIC *mg;
1018 HV *hv; 2185 HV *hv;
1019 int i; 2186 int i;
1020 2187
1021 Newz (0, coro, 1, struct coro); 2188 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV (); 2189 coro->args = newAV ();
2190 coro->flags = CF_NEW;
1023 2191
2192 if (coro_first) coro_first->prev = coro;
2193 coro->next = coro_first;
2194 coro_first = coro;
2195
1024 hv = newHV (); 2196 coro->hv = hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2197 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2198 mg->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2199 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027 2200
2201 av_extend (coro->args, items - 1);
1028 for (i = 1; i < items; i++) 2202 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i))); 2203 av_push (coro->args, newSVsv (ST (i)));
1030
1031 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1032 /*coro->stack = 0;*/
1033} 2204}
1034 OUTPUT: 2205 OUTPUT:
1035 RETVAL 2206 RETVAL
1036 2207
1037void 2208void
1038_set_stacklevel (...) 2209_set_stacklevel (...)
1039 ALIAS: 2210 CODE:
1040 Coro::State::transfer = 1 2211 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1041 Coro::schedule = 2
1042 Coro::cede = 3
1043 Coro::Cont::yield = 4
1044 CODE:
1045{
1046 struct transfer_args ta;
1047
1048 switch (ix)
1049 {
1050 case 0:
1051 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1052 ta.next = 0;
1053 ta.flags = TRANSFER_SET_STACKLEVEL;
1054 break;
1055
1056 case 1:
1057 if (items != 3)
1058 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1059
1060 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1061 break;
1062
1063 case 2:
1064 prepare_schedule (&ta);
1065 break;
1066
1067 case 3:
1068 prepare_cede (&ta);
1069 break;
1070
1071 case 4:
1072 {
1073 SV *yieldstack;
1074 SV *sv;
1075 AV *defav = GvAV (PL_defgv);
1076
1077 yieldstack = *hv_fetch (
1078 (HV *)SvRV (GvSV (coro_current)),
1079 "yieldstack", sizeof ("yieldstack") - 1,
1080 0
1081 );
1082
1083 /* set up @_ -- ugly */
1084 av_clear (defav);
1085 av_fill (defav, items - 1);
1086 while (items--)
1087 av_store (defav, items, SvREFCNT_inc (ST(items)));
1088
1089 sv = av_pop ((AV *)SvRV (yieldstack));
1090 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1091 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1092 ta.flags = 0;
1093 SvREFCNT_dec (sv);
1094 }
1095 break;
1096
1097 }
1098
1099 TRANSFER (ta);
1100}
1101 2212
1102void 2213void
1103_clone_state_from (SV *dst, SV *src) 2214transfer (...)
2215 PROTOTYPE: $$
1104 CODE: 2216 CODE:
1105{ 2217 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1106 struct coro *coro_src = SvSTATE (src);
1107 2218
1108 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2219bool
1109 2220_destroy (SV *coro_sv)
1110 ++coro_src->refcnt; 2221 CODE:
1111 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2222 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112} 2223 OUTPUT:
2224 RETVAL
1113 2225
1114void 2226void
1115_nonlocal_goto (IV nextop)
1116 CODE:
1117 /* uuh, somebody will kill me again for this */
1118 PL_op->op_next = INT2PTR (OP *, nextop);
1119
1120void
1121_exit (code) 2227_exit (int code)
1122 int code
1123 PROTOTYPE: $ 2228 PROTOTYPE: $
1124 CODE: 2229 CODE:
1125 _exit (code); 2230 _exit (code);
1126 2231
2232int
2233cctx_stacksize (int new_stacksize = 0)
2234 PROTOTYPE: ;$
2235 CODE:
2236 RETVAL = cctx_stacksize;
2237 if (new_stacksize)
2238 {
2239 cctx_stacksize = new_stacksize;
2240 ++cctx_gen;
2241 }
2242 OUTPUT:
2243 RETVAL
2244
2245int
2246cctx_max_idle (int max_idle = 0)
2247 PROTOTYPE: ;$
2248 CODE:
2249 RETVAL = cctx_max_idle;
2250 if (max_idle > 1)
2251 cctx_max_idle = max_idle;
2252 OUTPUT:
2253 RETVAL
2254
2255int
2256cctx_count ()
2257 PROTOTYPE:
2258 CODE:
2259 RETVAL = cctx_count;
2260 OUTPUT:
2261 RETVAL
2262
2263int
2264cctx_idle ()
2265 PROTOTYPE:
2266 CODE:
2267 RETVAL = cctx_idle;
2268 OUTPUT:
2269 RETVAL
2270
2271void
2272list ()
2273 PROTOTYPE:
2274 PPCODE:
2275{
2276 struct coro *coro;
2277 for (coro = coro_first; coro; coro = coro->next)
2278 if (coro->hv)
2279 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2280}
2281
2282void
2283call (Coro::State coro, SV *coderef)
2284 ALIAS:
2285 eval = 1
2286 CODE:
2287{
2288 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2289 {
2290 struct coro temp;
2291
2292 if (!(coro->flags & CF_RUNNING))
2293 {
2294 PUTBACK;
2295 save_perl (aTHX_ &temp);
2296 load_perl (aTHX_ coro);
2297 }
2298
2299 {
2300 dSP;
2301 ENTER;
2302 SAVETMPS;
2303 PUTBACK;
2304 PUSHSTACK;
2305 PUSHMARK (SP);
2306
2307 if (ix)
2308 eval_sv (coderef, 0);
2309 else
2310 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2311
2312 POPSTACK;
2313 SPAGAIN;
2314 FREETMPS;
2315 LEAVE;
2316 PUTBACK;
2317 }
2318
2319 if (!(coro->flags & CF_RUNNING))
2320 {
2321 save_perl (aTHX_ coro);
2322 load_perl (aTHX_ &temp);
2323 SPAGAIN;
2324 }
2325 }
2326}
2327
2328SV *
2329is_ready (Coro::State coro)
2330 PROTOTYPE: $
2331 ALIAS:
2332 is_ready = CF_READY
2333 is_running = CF_RUNNING
2334 is_new = CF_NEW
2335 is_destroyed = CF_DESTROYED
2336 CODE:
2337 RETVAL = boolSV (coro->flags & ix);
2338 OUTPUT:
2339 RETVAL
2340
2341void
2342throw (Coro::State self, SV *throw = &PL_sv_undef)
2343 PROTOTYPE: $;$
2344 CODE:
2345 SvREFCNT_dec (self->throw);
2346 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2347
2348void
2349api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2350 PROTOTYPE: $;$
2351 C_ARGS: aTHX_ coro, flags
2352
2353SV *
2354has_cctx (Coro::State coro)
2355 PROTOTYPE: $
2356 CODE:
2357 RETVAL = boolSV (!!coro->cctx);
2358 OUTPUT:
2359 RETVAL
2360
2361int
2362is_traced (Coro::State coro)
2363 PROTOTYPE: $
2364 CODE:
2365 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2366 OUTPUT:
2367 RETVAL
2368
2369UV
2370rss (Coro::State coro)
2371 PROTOTYPE: $
2372 ALIAS:
2373 usecount = 1
2374 CODE:
2375 switch (ix)
2376 {
2377 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2378 case 1: RETVAL = coro->usecount; break;
2379 }
2380 OUTPUT:
2381 RETVAL
2382
2383void
2384force_cctx ()
2385 PROTOTYPE:
2386 CODE:
2387 SvSTATE_current->cctx->idle_sp = 0;
2388
2389void
2390swap_defsv (Coro::State self)
2391 PROTOTYPE: $
2392 ALIAS:
2393 swap_defav = 1
2394 CODE:
2395 if (!self->slot)
2396 croak ("cannot swap state with coroutine that has no saved state,");
2397 else
2398 {
2399 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2400 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2401
2402 SV *tmp = *src; *src = *dst; *dst = tmp;
2403 }
2404
1127MODULE = Coro::State PACKAGE = Coro 2405MODULE = Coro::State PACKAGE = Coro
1128 2406
1129BOOT: 2407BOOT:
1130{ 2408{
1131 int i; 2409 int i;
1132 2410
2411 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2412 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2413 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2414
2415 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2416 SvREADONLY_on (coro_current);
2417
1133 coro_stash = gv_stashpv ("Coro", TRUE); 2418 coro_stash = gv_stashpv ("Coro", TRUE);
1134 2419
1135 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2420 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1136 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2421 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1137 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2422 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1138 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2423 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1139 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2424 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1140 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2425 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1141 2426
1142 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1143 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1144
1145 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2427 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1146 coro_ready[i] = newAV (); 2428 coro_ready[i] = newAV ();
1147 2429
1148 { 2430 {
1149 SV *sv = perl_get_sv("Coro::API", 1); 2431 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1150 2432
1151 coroapi.schedule = api_schedule; 2433 coroapi.schedule = api_schedule;
1152 coroapi.cede = api_cede; 2434 coroapi.cede = api_cede;
2435 coroapi.cede_notself = api_cede_notself;
1153 coroapi.ready = api_ready; 2436 coroapi.ready = api_ready;
2437 coroapi.is_ready = api_is_ready;
1154 coroapi.nready = &coro_nready; 2438 coroapi.nready = coro_nready;
1155 coroapi.current = coro_current; 2439 coroapi.current = coro_current;
1156 2440
1157 GCoroAPI = &coroapi; 2441 GCoroAPI = &coroapi;
1158 sv_setiv (sv, (IV)&coroapi); 2442 sv_setiv (sv, (IV)&coroapi);
1159 SvREADONLY_on (sv); 2443 SvREADONLY_on (sv);
1160 } 2444 }
1161} 2445}
1162 2446
2447void
2448schedule (...)
2449 CODE:
2450 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2451
2452void
2453cede (...)
2454 CODE:
2455 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2456
2457void
2458cede_notself (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2461
2462void
2463_set_current (SV *current)
2464 PROTOTYPE: $
2465 CODE:
2466 SvREFCNT_dec (SvRV (coro_current));
2467 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2468
2469void
2470_set_readyhook (SV *hook)
2471 PROTOTYPE: $
2472 CODE:
2473 SvREFCNT_dec (coro_readyhook);
2474 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2475
1163int 2476int
1164prio (Coro::State coro, int newprio = 0) 2477prio (Coro::State coro, int newprio = 0)
2478 PROTOTYPE: $;$
1165 ALIAS: 2479 ALIAS:
1166 nice = 1 2480 nice = 1
1167 CODE: 2481 CODE:
1168{ 2482{
1169 RETVAL = coro->prio; 2483 RETVAL = coro->prio;
1170 2484
1171 if (items > 1) 2485 if (items > 1)
1172 { 2486 {
1173 if (ix) 2487 if (ix)
1174 newprio += coro->prio; 2488 newprio = coro->prio - newprio;
1175 2489
1176 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2490 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1177 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2491 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1178 2492
1179 coro->prio = newprio; 2493 coro->prio = newprio;
1180 } 2494 }
1181} 2495}
2496 OUTPUT:
2497 RETVAL
1182 2498
1183void 2499SV *
1184ready (SV *self) 2500ready (SV *self)
1185 PROTOTYPE: $ 2501 PROTOTYPE: $
1186 CODE: 2502 CODE:
1187 api_ready (self); 2503 RETVAL = boolSV (api_ready (aTHX_ self));
2504 OUTPUT:
2505 RETVAL
1188 2506
1189int 2507int
1190nready (...) 2508nready (...)
1191 PROTOTYPE: 2509 PROTOTYPE:
1192 CODE: 2510 CODE:
1193 RETVAL = coro_nready; 2511 RETVAL = coro_nready;
1194 OUTPUT: 2512 OUTPUT:
1195 RETVAL 2513 RETVAL
1196 2514
2515# for async_pool speedup
2516void
2517_pool_1 (SV *cb)
2518 CODE:
2519{
2520 HV *hv = (HV *)SvRV (coro_current);
2521 struct coro *coro = SvSTATE_hv ((SV *)hv);
2522 AV *defav = GvAV (PL_defgv);
2523 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2524 AV *invoke_av;
2525 int i, len;
2526
2527 if (!invoke)
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 SvREFCNT_dec (coro->saved_deffh);
2536 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2537
2538 hv_store (hv, "desc", sizeof ("desc") - 1,
2539 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2540
2541 invoke_av = (AV *)SvRV (invoke);
2542 len = av_len (invoke_av);
2543
2544 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2545
2546 if (len > 0)
2547 {
2548 av_fill (defav, len - 1);
2549 for (i = 0; i < len; ++i)
2550 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2551 }
2552}
2553
2554void
2555_pool_2 (SV *cb)
2556 CODE:
2557{
2558 struct coro *coro = SvSTATE_current;
2559
2560 sv_setsv (cb, &PL_sv_undef);
2561
2562 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2563 coro->saved_deffh = 0;
2564
2565 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2566 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2567 {
2568 SV *old = PL_diehook;
2569 PL_diehook = 0;
2570 SvREFCNT_dec (old);
2571 croak ("\3async_pool terminate\2\n");
2572 }
2573
2574 av_clear (GvAV (PL_defgv));
2575 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2576 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2577
2578 coro->prio = 0;
2579
2580 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2581 api_trace (aTHX_ coro_current, 0);
2582
2583 av_push (av_async_pool, newSVsv (coro_current));
2584}
2585
2586
1197MODULE = Coro::State PACKAGE = Coro::AIO 2587MODULE = Coro::State PACKAGE = Coro::AIO
1198 2588
2589void
2590_get_state (SV *self)
2591 PROTOTYPE: $
2592 PPCODE:
2593{
2594 AV *defav = GvAV (PL_defgv);
2595 AV *av = newAV ();
2596 int i;
2597 SV *data_sv = newSV (sizeof (struct io_state));
2598 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2599 SvCUR_set (data_sv, sizeof (struct io_state));
2600 SvPOK_only (data_sv);
2601
2602 data->errorno = errno;
2603 data->laststype = PL_laststype;
2604 data->laststatval = PL_laststatval;
2605 data->statcache = PL_statcache;
2606
2607 av_extend (av, AvFILLp (defav) + 1 + 1);
2608
2609 for (i = 0; i <= AvFILLp (defav); ++i)
2610 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2611
2612 av_push (av, data_sv);
2613
2614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2615
2616 api_ready (aTHX_ self);
2617}
2618
2619void
2620_set_state (SV *state)
2621 PROTOTYPE: $
2622 PPCODE:
2623{
2624 AV *av = (AV *)SvRV (state);
2625 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2626 int i;
2627
2628 errno = data->errorno;
2629 PL_laststype = data->laststype;
2630 PL_laststatval = data->laststatval;
2631 PL_statcache = data->statcache;
2632
2633 EXTEND (SP, AvFILLp (av));
2634 for (i = 0; i < AvFILLp (av); ++i)
2635 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2636}
2637
2638
2639MODULE = Coro::State PACKAGE = Coro::AnyEvent
2640
2641BOOT:
2642 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2643
2644void
2645_schedule (...)
2646 CODE:
2647{
2648 static int incede;
2649
2650 api_cede_notself (aTHX);
2651
2652 ++incede;
2653 while (coro_nready >= incede && api_cede (aTHX))
2654 ;
2655
2656 sv_setsv (sv_activity, &PL_sv_undef);
2657 if (coro_nready >= incede)
2658 {
2659 PUSHMARK (SP);
2660 PUTBACK;
2661 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2662 SPAGAIN;
2663 }
2664
2665 --incede;
2666}
2667
2668
2669MODULE = Coro::State PACKAGE = PerlIO::cede
2670
2671BOOT:
2672 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2673
2674MODULE = Coro::State PACKAGE = Coro::Semaphore
2675
1199SV * 2676SV *
1200_get_state () 2677new (SV *klass, SV *count_ = 0)
1201 CODE: 2678 CODE:
1202{ 2679{
1203 struct { 2680 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1204 int errorno; 2681 AV *av = newAV ();
1205 int laststype; 2682 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1206 int laststatval; 2683 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1207 Stat_t statcache;
1208 } data;
1209
1210 data.errorno = errno;
1211 data.laststype = PL_laststype;
1212 data.laststatval = PL_laststatval;
1213 data.statcache = PL_statcache;
1214
1215 RETVAL = newSVpvn ((char *)&data, sizeof data);
1216} 2684}
1217 OUTPUT: 2685 OUTPUT:
1218 RETVAL 2686 RETVAL
1219 2687
2688SV *
2689count (SV *self)
2690 CODE:
2691 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2692 OUTPUT:
2693 RETVAL
2694
1220void 2695void
1221_set_state (char *data_) 2696up (SV *self, int adjust = 1)
1222 PROTOTYPE: $ 2697 ALIAS:
2698 adjust = 1
2699 CODE:
2700 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2701
2702void
2703down (SV *self)
2704 CODE:
2705 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2706
2707void
2708try (SV *self)
2709 PPCODE:
2710{
2711 AV *av = (AV *)SvRV (self);
2712 SV *count_sv = AvARRAY (av)[0];
2713 IV count = SvIVX (count_sv);
2714
2715 if (count > 0)
2716 {
2717 --count;
2718 SvIVX (count_sv) = count;
2719 XSRETURN_YES;
2720 }
2721 else
2722 XSRETURN_NO;
2723}
2724
2725void
2726waiters (SV *self)
1223 CODE: 2727 CODE:
1224{ 2728{
1225 struct { 2729 AV *av = (AV *)SvRV (self);
2730
2731 if (GIMME_V == G_SCALAR)
2732 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2733 else
2734 {
1226 int errorno; 2735 int i;
1227 int laststype; 2736 EXTEND (SP, AvFILLp (av) + 1 - 1);
1228 int laststatval; 2737 for (i = 1; i <= AvFILLp (av); ++i)
1229 Stat_t statcache; 2738 PUSHs (newSVsv (AvARRAY (av)[i]));
1230 } *data = (void *)data_; 2739 }
1231
1232 errno = data->errorno;
1233 PL_laststype = data->laststype;
1234 PL_laststatval = data->laststatval;
1235 PL_statcache = data->statcache;
1236} 2740}
2741

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