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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 1.276 by root, Sat Nov 15 07:49:48 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
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
50# endif 153# 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
59#endif
60 154
61/* The next macro should declare a variable stacklevel that contains and approximation
62 * to the current C stack pointer. Its property is that it changes with each call
63 * and should be unique. */
64#define dSTACKLEVEL int stacklevel
65#define STACKLEVEL ((void *)&stacklevel)
66
67#define IN_DESTRUCT (PL_main_cv == Nullcv)
68
69#include "CoroAPI.h"
70
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 155#else
156
78# define LOCK (void)0 157# define LOCK (void)0
79# define UNLOCK (void)0 158# define UNLOCK (void)0
80#endif
81 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
82static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
83static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
84static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
86 213
87/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 215typedef struct coro_cctx
216{
89 struct coro_stack *next; 217 struct coro_cctx *next;
90 218
91 /* the stack */ 219 /* the stack */
92 void *sptr; 220 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 221 size_t ssize;
94 222
95 /* cpu state */ 223 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97 JMPENV *top_env; 226 JMPENV *top_env;
98 coro_context cctx; 227 coro_context cctx;
99} coro_stack; 228
229 U32 gen;
230#if CORO_USE_VALGRIND
231 int valgrind_id;
232#endif
233 unsigned char flags;
234} coro_cctx;
235
236enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
242
243/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct
245{
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
100 256
101/* this is a structure representing a perl-level coroutine */ 257/* this is a structure representing a perl-level coroutine */
102struct coro { 258struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 259 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 260 coro_cctx *cctx;
105 261
106 /* data associated with this coroutine (initial args) */ 262 /* process data */
107 AV *args; 263 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; 264 AV *mainstack;
123 SV **stack_sp; 265 perl_slots *slot; /* basically the saved sp */
124 OP *op; 266
125 SV **curpad; 267 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 268 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 269 int flags; /* CF_ flags */
128 SV **stack_base; 270 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 271
130 SV **tmps_stack; 272 /* statistics */
131 I32 tmps_floor; 273 int usecount; /* number of transfers to this coro */
132 I32 tmps_ix;
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;
148 274
149 /* coro process data */ 275 /* coro process data */
150 int prio; 276 int prio;
277 SV *throw; /* exception to be thrown */
278
279 /* async_pool */
280 SV *saved_deffh;
281
282 /* linked list */
283 struct coro *next, *prev;
151}; 284};
152 285
153typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
155 288
289static struct CoroSLF slf_frame; /* the current slf frame */
290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
156static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
157coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
158{ 341{
159 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
161 344
162 newpadlist = newAV (); 345 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 351#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 353 --AvFILLp (padlist);
171 354
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
174 357
175 return newpadlist; 358 return newpadlist;
176} 359}
177 360
178static void 361static void
179free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
180{ 363{
181 /* may be during global destruction */ 364 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
183 { 366 {
184 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
205 AV *padlist; 388 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
207 390
208 /* casting is fun. */ 391 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
211 394
212 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 396
214 return 0; 397 return 0;
215} 398}
216 399
217#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
218 402
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
220 443
221/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
222static void 445static void
223get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
224{ 447{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
226 450
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 453 else
230 { 454 {
231#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
237#else 462#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239#endif 464#endif
240 } 465 }
241} 466}
242 467
243static void 468static void
244put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
245{ 470{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
247 473
248 if (!mg) 474 if (expect_false (!mg))
249 { 475 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 }
255 476
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
257}
258 478
259#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
261 481
262#define LOAD(state) load_state((state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 483}
264 484
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
266 486
267static void 487static void
268load_state(Coro__State c) 488load_perl (pTHX_ Coro__State c)
269{ 489{
270 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 491 c->slot = 0;
272 492
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 493 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;
303 494
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
307 503
308 { 504 {
309 dSP; 505 dSP;
506
310 CV *cv; 507 CV *cv;
311 508
312 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
314 { 511 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
321 } 514 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 515 }
325 516
326 PUTBACK; 517 PUTBACK;
327 } 518 }
328}
329 519
520 slf_frame = c->slf_frame;
521}
522
330static void 523static void
331save_state(Coro__State c, int flags) 524save_perl (pTHX_ Coro__State c)
332{ 525{
526 c->slf_frame = slf_frame;
527
333 { 528 {
334 dSP; 529 dSP;
335 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 534 /*
340 * the worst thing you can imagine happens first - we have to save 535 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
342 */ 537 */
343 538
344 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
346 for (;;) 541 for (;;)
347 { 542 {
348 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
349 { 544 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
351 546
352 if (CxTYPE(cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
353 { 548 {
354 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
550
355 if (CvDEPTH(cv)) 551 if (expect_true (CvDEPTH (cv)))
356 { 552 {
357 EXTEND (SP, CvDEPTH(cv)*2); 553 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)); 554 PUSHs ((SV *)CvPADLIST (cv));
555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
368 557
558 CvDEPTH (cv) = 0;
369 get_padlist (cv); 559 get_padlist (aTHX_ cv);
370 } 560 }
371 } 561 }
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 } 562 }
381 563
382 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 565 break;
384 566
385 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
388 } 570 }
389 571
390 PUTBACK; 572 PUTBACK;
391 } 573 }
392 574
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
396 586
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; 587 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 588
404 c->op = PL_op; 589 {
405 c->curpad = PL_curpad; 590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 591
407 c->compcv = PL_compcv; 592 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 593 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 594 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 595 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 596
412 c->tmps_ix = PL_tmps_ix; 597 #define VAR(name,type) slot->name = PL_ ## name;
413 c->tmps_max = PL_tmps_max; 598 # include "state.h"
414 c->markstack = PL_markstack; 599 #undef VAR
415 c->markstack_ptr = PL_markstack_ptr; 600 }
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} 601}
431 602
432/* 603/*
433 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
437 */ 608 */
609#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks
611#else
438static void 612static void
439coro_init_stacks () 613coro_init_stacks (pTHX)
440{ 614{
441 LOCK; 615 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; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
445 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
446 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
447 619
448 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
449 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
450 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
451 623
452 New(50,PL_tmps_stack,96,SV*); 624 New(50,PL_tmps_stack,32,SV*);
453 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
454 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
455 PL_tmps_max = 96; 627 PL_tmps_max = 32;
456 628
457 New(54,PL_markstack,16,I32); 629 New(54,PL_markstack,16,I32);
458 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
459 PL_markstack_max = PL_markstack + 16; 631 PL_markstack_max = PL_markstack + 16;
460 632
461#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
462 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
463#endif 635#endif
464 636
465 New(54,PL_scopestack,16,I32); 637 New(54,PL_scopestack,8,I32);
466 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
467 PL_scopestack_max = 16; 639 PL_scopestack_max = 8;
468 640
469 New(54,PL_savestack,96,ANY); 641 New(54,PL_savestack,24,ANY);
470 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
471 PL_savestack_max = 96; 643 PL_savestack_max = 24;
472 644
473#if PERL_VERSION < 9 645#if !PERL_VERSION_ATLEAST (5,10,0)
474 New(54,PL_retstack,8,OP*); 646 New(54,PL_retstack,4,OP*);
475 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
476 PL_retstack_max = 8; 648 PL_retstack_max = 4;
477#endif 649#endif
478
479 UNLOCK;
480} 650}
651#endif
481 652
482/* 653/*
483 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
484 */ 655 */
485static void 656static void
486destroy_stacks() 657coro_destruct_stacks (pTHX)
487{ 658{
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) 659 while (PL_curstackinfo->si_next)
500 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
501 661
502 while (PL_curstackinfo) 662 while (PL_curstackinfo)
503 { 663 {
504 PERL_SI *p = PL_curstackinfo->si_prev; 664 PERL_SI *p = PL_curstackinfo->si_prev;
505 665
506 { /*D*//*remove*/
507 dSP;
508 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
509 PUTBACK; /* possibly superfluous */
510 }
511
512 if (!IN_DESTRUCT) 666 if (!IN_DESTRUCT)
513 {
514 dounwind (-1);/*D*//*remove*/
515 SvREFCNT_dec (PL_curstackinfo->si_stack); 667 SvREFCNT_dec (PL_curstackinfo->si_stack);
516 }
517 668
518 Safefree (PL_curstackinfo->si_cxstack); 669 Safefree (PL_curstackinfo->si_cxstack);
519 Safefree (PL_curstackinfo); 670 Safefree (PL_curstackinfo);
520 PL_curstackinfo = p; 671 PL_curstackinfo = p;
521 } 672 }
522 673
523 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
524 Safefree (PL_markstack); 675 Safefree (PL_markstack);
525 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
526 Safefree (PL_savestack); 677 Safefree (PL_savestack);
527#if PERL_VERSION < 9 678#if !PERL_VERSION_ATLEAST (5,10,0)
528 Safefree (PL_retstack); 679 Safefree (PL_retstack);
529#endif 680#endif
530} 681}
531 682
683static size_t
684coro_rss (pTHX_ struct coro *coro)
685{
686 size_t rss = sizeof (*coro);
687
688 if (coro->mainstack)
689 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING)
694 {
695 slot = &tmp_slot;
696
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
700 }
701 else
702 slot = coro->slot;
703
704 if (slot)
705 {
706 rss += sizeof (slot->curstackinfo);
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 }
718 }
719
720 return rss;
721}
722
723/** coroutine stack handling ************************************************/
724
725static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
727static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
728
729/* apparently < 5.8.8 */
730#ifndef MgPV_nolen_const
731#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
732 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
733 (const char*)(mg)->mg_ptr)
734#endif
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
532static void 745static int
533setup_coro (struct coro *coro) 746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816prepare_nop (aTHX_ struct coro_transfer_args *ta)
817{
818 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta;
820}
821
822static int
823slf_check_nop (aTHX)
824{
825 return 0;
826}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
534{ 830{
535 /* 831 /*
536 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
537 */ 833 */
538 dTHX; 834 coro_init_stacks (aTHX);
835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882
883static void
884coro_destruct (pTHX_ struct coro *coro)
885{
886 if (!IN_DESTRUCT)
887 {
888 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0);
890 assert (PL_tmps_floor == -1);
891
892 /* free all temporaries */
893 FREETMPS;
894 assert (PL_tmps_ix == -1);
895
896 /* unwind all extra stacks */
897 POPSTACK_TO (PL_mainstack);
898
899 /* unwind main stack */
900 dounwind (-1);
901 }
902
903 SvREFCNT_dec (GvSV (PL_defgv));
904 SvREFCNT_dec (GvAV (PL_defgv));
905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
915
916 coro_destruct_stacks (aTHX);
917}
918
919INLINE void
920free_coro_mortal (pTHX)
921{
922 if (expect_true (coro_mortal))
923 {
924 SvREFCNT_dec (coro_mortal);
925 coro_mortal = 0;
926 }
927}
928
929static int
930runops_trace (pTHX)
931{
932 COP *oldcop = 0;
933 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 {
939 PERL_ASYNC_CHECK ();
940
941 if (cctx->flags & CC_TRACE_ALL)
942 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
944 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top;
947 AV *av = newAV (); /* return values */
948 SV **cb;
949 dSP;
950
951 GV *gv = CvGV (cx->blk_sub.cv);
952 SV *fullname = sv_2mortal (newSV (0));
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 bot = PL_stack_base + cx->blk_oldsp + 1;
957 top = cx->blk_gimme == G_ARRAY ? SP + 1
958 : cx->blk_gimme == G_SCALAR ? bot + 1
959 : bot;
960
961 av_extend (av, top - bot);
962 while (bot < top)
963 av_push (av, SvREFCNT_inc_NN (*bot++));
964
965 PL_runops = RUNOPS_DEFAULT;
966 ENTER;
967 SAVETMPS;
968 EXTEND (SP, 3);
969 PUSHMARK (SP);
970 PUSHs (&PL_sv_no);
971 PUSHs (fullname);
972 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
973 PUTBACK;
974 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
975 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
976 SPAGAIN;
977 FREETMPS;
978 LEAVE;
979 PL_runops = runops_trace;
980 }
981
982 if (oldcop != PL_curcop)
983 {
984 oldcop = PL_curcop;
985
986 if (PL_curcop != &PL_compiling)
987 {
988 SV **cb;
989
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
991 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 {
996 runops_proc_t old_runops = PL_runops;
997 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0));
1000
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 ENTER;
1006 SAVETMPS;
1007 EXTEND (SP, 3);
1008 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN;
1016 FREETMPS;
1017 LEAVE;
1018 PL_runops = runops_trace;
1019 }
1020
1021 oldcxix = cxstack_ix;
1022 }
1023
1024 if (cctx->flags & CC_TRACE_LINE)
1025 {
1026 dSP;
1027
1028 PL_runops = RUNOPS_DEFAULT;
1029 ENTER;
1030 SAVETMPS;
1031 EXTEND (SP, 3);
1032 PL_runops = RUNOPS_DEFAULT;
1033 PUSHMARK (SP);
1034 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1035 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
1043 }
1044 }
1045 }
1046 }
1047 }
1048
1049 TAINT_NOT;
1050 return 0;
1051}
1052
1053static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
1064static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx)
1066{
539 dSP; 1067 dSP;
540 UNOP myop; 1068 UNOP myop;
541 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
542 1069
543 coro_init_stacks (); 1070 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 1071
549 SPAGAIN; 1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
550 1074
551 Zero (&myop, 1, UNOP); 1075 Zero (&myop, 1, UNOP);
552 myop.op_next = Nullop; 1076 myop.op_next = PL_op;
553 myop.op_flags = OPf_WANT_VOID; 1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
554 1078
1079 PUSHMARK (SP);
1080 EXTEND (SP, 2);
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1083 PUTBACK;
555 PL_op = (OP *)&myop; 1084 PL_op = (OP *)&myop;
556
557 PUSHMARK(SP);
558 XPUSHs (sub_init);
559 PUTBACK;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN; 1086 SPAGAIN;
562
563 ENTER; /* necessary e.g. for dounwind */
564} 1087}
565 1088
566static void 1089/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void
1091transfer_tail (pTHX)
1092{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
567free_coro_mortal () 1097 free_coro_mortal (aTHX);
568{
569 if (coro_mortal)
570 {
571 SvREFCNT_dec (coro_mortal);
572 coro_mortal = 0;
573 }
574}
575
576static void
577coro_run (void *arg)
578{
579 /*
580 * this is a _very_ stripped down perl interpreter ;)
581 */
582 dTHX;
583 int ret;
584
585 UNLOCK; 1098 UNLOCK;
586 1099
587 PL_top_env = &PL_start_env; 1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
588 1103
589 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1104 next->throw = 0;
590 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
591 1109
592 /* continue at cctx_init, without entersub */ 1110/*
593 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE)); 1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
594 1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX);
1134
595 /* somebody will hit me for both perl_run and PL_restartop */ 1135 /* somebody or something will hit me for both perl_run and PL_restartop */
596 ret = perl_run (PERL_GET_CONTEXT); 1136 PL_restartop = PL_op;
597 printf ("ret %d\n", ret);//D 1137 perl_run (PL_curinterp);
598 1138
599 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1139 /*
600 abort (); 1140 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept
1145 */
1146 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
601} 1149}
602 1150
603static coro_stack * 1151static coro_cctx *
604stack_new () 1152cctx_new ()
605{ 1153{
606 coro_stack *stack; 1154 coro_cctx *cctx;
607 1155
1156 ++cctx_count;
608 New (0, stack, 1, coro_stack); 1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
609 1185
610#if HAVE_MMAP 1186#if HAVE_MMAP
611
612 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
613 /* mmap suppsedly does allocate-on-write for us */ 1188 /* 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); 1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
615 1190
616 if (stack->sptr == (void *)-1) 1191 if (cctx->sptr != (void *)-1)
1192 {
1193 #if CORO_STACKGUARD
1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1195 #endif
1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1198 cctx->flags |= CC_MAPPED;
617 { 1199 }
1200 else
1201#endif
1202 {
1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1204 New (0, cctx->sptr, cctx_stacksize, long);
1205
1206 if (!cctx->sptr)
1207 {
618 perror ("FATAL: unable to mmap stack for coroutine"); 1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
619 _exit (EXIT_FAILURE); 1209 _exit (EXIT_FAILURE);
620 } 1210 }
621 1211
622# if STACKGUARD 1212 stack_start = cctx->sptr;
623 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1213 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 { 1214 }
633 perror (stderr, "FATAL: unable to malloc stack for coroutine");
634 _exit (EXIT_FAILURE);
635 }
636 1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
637#endif 1218 #endif
638 1219
639 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
640 1221
641 return stack; 1222 return cctx;
642} 1223}
643 1224
644static void 1225static void
645stack_free (coro_stack *stack) 1226cctx_destroy (coro_cctx *cctx)
646{ 1227{
647 if (!stack) 1228 if (!cctx)
648 return; 1229 return;
649 1230
1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
1233
1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1239 #endif
1240
650#if HAVE_MMAP 1241#if HAVE_MMAP
651 munmap (stack->sptr, stack->ssize); 1242 if (cctx->flags & CC_MAPPED)
652#else 1243 munmap (cctx->sptr, cctx->ssize);
1244 else
1245#endif
653 Safefree (stack->sptr); 1246 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 } 1247 }
676 1248
677 return stack; 1249 Safefree (cctx);
678} 1250}
679 1251
680static void 1252/* wether this cctx should be destructed */
681stack_put (coro_stack *stack) 1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
682{
683 stack->next = stack_first;
684 stack_first = stack;
685}
686 1254
687/* never call directly, always through the coro_state_transfer global variable */ 1255static coro_cctx *
1256cctx_get (pTHX)
1257{
1258 while (expect_true (cctx_first))
1259 {
1260 coro_cctx *cctx = cctx_first;
1261 cctx_first = cctx->next;
1262 --cctx_idle;
1263
1264 if (expect_true (!CCTX_EXPIRED (cctx)))
1265 return cctx;
1266
1267 cctx_destroy (cctx);
1268 }
1269
1270 return cctx_new_run ();
1271}
1272
688static void 1273static void
1274cctx_put (coro_cctx *cctx)
1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
1278 /* free another cctx if overlimit */
1279 if (expect_false (cctx_idle >= cctx_max_idle))
1280 {
1281 coro_cctx *first = cctx_first;
1282 cctx_first = first->next;
1283 --cctx_idle;
1284
1285 cctx_destroy (first);
1286 }
1287
1288 ++cctx_idle;
1289 cctx->next = cctx_first;
1290 cctx_first = cctx;
1291}
1292
1293/** coroutine switching *****************************************************/
1294
1295static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{
1298 if (expect_true (prev != next))
1299 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
1313 }
1314}
1315
1316/* always use the TRANSFER macro */
1317static void NOINLINE
689transfer_impl (struct coro *prev, struct coro *next, int flags) 1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
690{ 1319{
691 dSTACKLEVEL; 1320 dSTACKLEVEL;
692 1321
693 /* sometimes transfer is only called to set idle_sp */ 1322 /* sometimes transfer is only called to set idle_sp */
694 if (flags == TRANSFER_SET_STACKLEVEL) 1323 if (expect_false (!next))
695 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1324 {
696 else if (prev != next) 1325 ((coro_cctx *)prev)->idle_sp = stacklevel;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
697 { 1327 }
1328 else if (expect_true (prev != next))
1329 {
698 coro_stack *prev__stack; 1330 coro_cctx *prev__cctx;
1331
1332 if (expect_false (prev->flags & CF_NEW))
1333 {
1334 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING;
1338 }
1339
1340 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING;
699 1342
700 LOCK; 1343 LOCK;
701 1344
702 if (next->mainstack) 1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
1348 if (expect_false (next->flags & CF_NEW))
703 { 1349 {
704 /* coroutine already started */ 1350 /* need to start coroutine */
705 SAVE (prev, flags); 1351 next->flags &= ~CF_NEW;
706 LOAD (next); 1352 /* setup coroutine call */
1353 coro_setup (aTHX_ next);
707 } 1354 }
708 else 1355 else
1356 load_perl (aTHX_ next);
1357
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */
1361 if (expect_true (
1362 prev__cctx->idle_sp == stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
709 { 1366 {
710 /* need to start coroutine */ 1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
711 /* first get rid of the old state */ 1368 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); 1369
713 /* setup coroutine call */ 1370 prev->cctx = 0;
714 setup_coro (next); 1371
715 /* need a stack */ 1372 /* 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; 1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1376 next->cctx = cctx_get (aTHX);
1377
1378 cctx_put (prev__cctx);
717 } 1379 }
718 1380
719 if (!prev->stack) 1381 ++next->usecount;
720 /* create a new empty context */
721 Newz (0, prev->stack, 1, coro_stack);
722 1382
723 prev__stack = prev->stack; 1383 if (expect_true (!next->cctx))
1384 next->cctx = cctx_get (aTHX);
724 1385
725 /* possibly "free" the stack */ 1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
726 if (prev__stack->idle_sp == STACKLEVEL) 1387 transfer_next = next;
1388
1389 if (expect_false (prev__cctx != next->cctx))
727 { 1390 {
728 stack_put (prev__stack); 1391 prev__cctx->top_env = PL_top_env;
729 prev->stack = 0; 1392 PL_top_env = next->cctx->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
730 } 1394 }
731 1395
732 if (!next->stack) 1396 transfer_tail (aTHX);
733 next->stack = stack_get (); 1397 }
1398}
734 1399
735 if (prev__stack != next->stack) 1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
736 { 1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
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 1402
742 free_coro_mortal (); 1403/** high level stuff ********************************************************/
743 1404
1405static int
1406coro_state_destroy (pTHX_ struct coro *coro)
1407{
1408 if (coro->flags & CF_DESTROYED)
1409 return 0;
1410
1411 coro->flags |= CF_DESTROYED;
1412
1413 if (coro->flags & CF_READY)
1414 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready;
744 UNLOCK; 1419 UNLOCK;
745 } 1420 }
746} 1421 else
747 1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
748/* use this function pointer to call the above function */
749/* this is done to increase chances of the compiler not inlining the call */
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
753struct transfer_args
754{
755 struct coro *prev, *next;
756 int flags;
757};
758
759#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
760
761static void
762coro_state_destroy (struct coro *coro)
763{
764 if (coro->refcnt--)
765 return;
766 1423
767 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
768 { 1425 {
769 struct coro temp; 1426 struct coro temp;
770 1427
771 SAVE ((&temp), TRANSFER_SAVE_ALL); 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
772 LOAD (coro);
773 1429
774 destroy_stacks (); 1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro);
775 1432
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1433 coro_destruct (aTHX_ coro);
777 1434
1435 load_perl (aTHX_ &temp);
1436
778 coro->mainstack = 0; 1437 coro->slot = 0;
779 } 1438 }
780 1439
781 stack_free (coro->stack); 1440 cctx_destroy (coro->cctx);
782 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
783 Safefree (coro); 1442
1443 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next;
1446
1447 return 1;
784} 1448}
785 1449
786static int 1450static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788{ 1452{
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1453 struct coro *coro = (struct coro *)mg->mg_ptr;
790 mg->mg_ptr = 0; 1454 mg->mg_ptr = 0;
791 1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
792 coro_state_destroy (coro); 1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
793 1463
794 return 0; 1464 return 0;
795} 1465}
796 1466
797static int 1467static int
… …
802 ++coro->refcnt; 1472 ++coro->refcnt;
803 1473
804 return 0; 1474 return 0;
805} 1475}
806 1476
807static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1477static MGVTBL coro_state_vtbl = {
1478 0, 0, 0, 0,
1479 coro_state_free,
1480 0,
1481#ifdef MGf_DUP
1482 coro_state_dup,
1483#else
1484# define MGf_DUP 0
1485#endif
1486};
808 1487
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 1488static void
832prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
833{ 1490{
834 ta->prev = SvSTATE (prev); 1491 ta->prev = SvSTATE (prev_sv);
835 ta->next = SvSTATE (next); 1492 ta->next = SvSTATE (next_sv);
836 ta->flags = flags; 1493 TRANSFER_CHECK (*ta);
837} 1494}
838 1495
839static void 1496static void
840api_transfer (SV *prev, SV *next, int flags) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
841{ 1498{
842 dTHX;
843 struct transfer_args ta; 1499 struct coro_transfer_args ta;
844 1500
845 prepare_transfer (&ta, prev, next, flags); 1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
846 TRANSFER (ta); 1502 TRANSFER (ta, 1);
847} 1503}
848 1504
849/** Coro ********************************************************************/ 1505/** Coro ********************************************************************/
850 1506
851#define PRIO_MAX 3
852#define PRIO_HIGH 1
853#define PRIO_NORMAL 0
854#define PRIO_LOW -1
855#define PRIO_IDLE -3
856#define PRIO_MIN -4
857
858/* for Coro.pm */
859static GV *coro_current, *coro_idle;
860static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
861static int coro_nready;
862
863static void 1507static void
864coro_enq (SV *sv) 1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
865{ 1515{
866 int prio; 1516 int prio;
867 1517
868 if (SvTYPE (sv) != SVt_PVHV) 1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
869 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
870 1521
871 prio = SvSTATE (sv)->prio; 1522 return 0;
1523}
872 1524
873 av_push (coro_ready [prio - PRIO_MIN], sv); 1525static int
1526api_ready (pTHX_ SV *coro_sv)
1527{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv);
1536
1537 if (coro->flags & CF_READY)
1538 return 0;
1539
1540 coro->flags |= CF_READY;
1541
1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
874 coro_nready++; 1548 ++coro_nready;
1549
1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570
1571 return 1;
1572}
1573
1574static int
1575api_is_ready (pTHX_ SV *coro_sv)
1576{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578}
1579
1580INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1582{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1633 LOCK;
1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1636 UNLOCK;
1637}
1638
1639INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{
1642 api_ready (aTHX_ coro_current);
1643 prepare_schedule (aTHX_ ta);
1644}
1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
1655 }
1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1667}
1668
1669static int
1670api_cede (pTHX)
1671{
1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static int
1686api_cede_notself (pTHX)
1687{
1688 if (coro_nready)
1689 {
1690 struct coro_transfer_args ta;
1691
1692 prepare_cede_notself (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694 return 1;
1695 }
1696 else
1697 return 0;
1698}
1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
1725#if 0
1726static int
1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1728{
1729 AV *padlist;
1730 AV *av = (AV *)mg->mg_obj;
1731
1732 abort ();
1733
1734 return 0;
1735}
1736
1737static MGVTBL coro_gensub_vtbl = {
1738 0, 0, 0, 0,
1739 coro_gensub_free
1740};
1741#endif
1742
1743/*****************************************************************************/
1744/* PerlIO::cede */
1745
1746typedef struct
1747{
1748 PerlIOBuf base;
1749 NV next, every;
1750} PerlIOCede;
1751
1752static IV
1753PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1758 self->next = nvtime () + self->every;
1759
1760 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
875} 1761}
876 1762
877static SV * 1763static SV *
878coro_deq (int min_prio) 1764PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
879{ 1765{
880 int prio = PRIO_MAX - PRIO_MIN; 1766 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
881 1767
882 min_prio -= PRIO_MIN; 1768 return newSVnv (self->every);
883 if (min_prio < 0) 1769}
884 min_prio = 0;
885 1770
886 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1771static IV
887 if (AvFILLp (coro_ready [prio]) >= 0) 1772PerlIOCede_flush (pTHX_ PerlIO *f)
1773{
1774 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1775 double now = nvtime ();
1776
1777 if (now >= self->next)
1778 {
1779 api_cede (aTHX);
1780 self->next = now + self->every;
1781 }
1782
1783 return PerlIOBuf_flush (aTHX_ f);
1784}
1785
1786static PerlIO_funcs PerlIO_cede =
1787{
1788 sizeof(PerlIO_funcs),
1789 "cede",
1790 sizeof(PerlIOCede),
1791 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1792 PerlIOCede_pushed,
1793 PerlIOBuf_popped,
1794 PerlIOBuf_open,
1795 PerlIOBase_binmode,
1796 PerlIOCede_getarg,
1797 PerlIOBase_fileno,
1798 PerlIOBuf_dup,
1799 PerlIOBuf_read,
1800 PerlIOBuf_unread,
1801 PerlIOBuf_write,
1802 PerlIOBuf_seek,
1803 PerlIOBuf_tell,
1804 PerlIOBuf_close,
1805 PerlIOCede_flush,
1806 PerlIOBuf_fill,
1807 PerlIOBase_eof,
1808 PerlIOBase_error,
1809 PerlIOBase_clearerr,
1810 PerlIOBase_setlinebuf,
1811 PerlIOBuf_get_base,
1812 PerlIOBuf_bufsiz,
1813 PerlIOBuf_get_ptr,
1814 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt,
1816};
1817
1818/*****************************************************************************/
1819
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP *
1831pp_restore (pTHX)
1832{
1833 dSP;
1834
1835 PUSHMARK (SP);
1836
1837 EXTEND (SP, 3);
1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841 PUSHs ((SV *)CvGV (slf_cv));
1842
1843 RETURNOP (slf_restore.op_first);
1844}
1845
1846static void
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851
1852static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1856
1857 frame->prepare = slf_prepare_set_stacklevel;
1858 frame->check = slf_check_nop;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861
1862static void
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 {
1921 /* first iteration */
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926
1927 /* do a quick consistency check on the "function" object, and if it isn't */
1928 /* for us, divert to the real entersub */
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1930 return PL_ppaddr[OP_ENTERSUB](aTHX);
1931
1932 /* pop args */
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
1936 {
1937 /* ampersand-form of call, use @_ instead of stack */
1938 AV *av = GvAV (PL_defgv);
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 }
1942
1943 PUTBACK;
1944
1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
1953 {
1954 struct coro_transfer_args ta;
1955
1956 slf_frame.prepare (aTHX_ &ta);
1957 TRANSFER (ta, 0);
1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
1967
1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
888 { 1972 {
889 coro_nready--; 1973 if (sp == bot)
890 return av_shift (coro_ready [prio]); 1974 XPUSHs (&PL_sv_undef);
1975
1976 SP = bot + 1;
891 } 1977 }
892 1978
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; 1979 PUTBACK;
937 call_sv (GvSV (coro_idle), G_DISCARD); 1980 }
938 1981
939 FREETMPS; 1982 return NORMAL;
940 LEAVE; 1983}
1984
1985static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1987{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1989
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016}
2017
2018/*****************************************************************************/
2019
2020static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2022{
2023 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0];
2025
2026 if (SvIVX (count_sv) > 0)
2027 {
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2029 return 0;
941 } 2030 }
2031 else
942 } 2032 {
2033 int i;
2034 /* if we were woken up but can't down, we look through the whole */
2035 /* waiters list and only add us if we aren't in there already */
2036 /* this avoids some degenerate memory usage cases */
943 2037
944 prev = SvRV (current); 2038 for (i = 1; i <= AvFILLp (av); ++i)
945 SvRV (current) = next; 2039 if (AvARRAY (av)[i] == SvRV (coro_current))
2040 return 1;
946 2041
947 /* free this only after the transfer */ 2042 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
948 free_coro_mortal (); 2043 return 1;
949 coro_mortal = prev; 2044 }
950
951 ta->prev = SvSTATE (prev);
952 ta->next = SvSTATE (next);
953 ta->flags = TRANSFER_SAVE_ALL;
954
955 UNLOCK;
956} 2045}
957 2046
958static void 2047static void
959prepare_cede (struct transfer_args *ta) 2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
960{ 2049{
961 LOCK; 2050 AV *av = (AV *)SvRV (arg [0]);
962 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
963 UNLOCK;
964 2051
965 prepare_schedule (ta); 2052 if (SvIVX (AvARRAY (av)[0]) > 0)
966} 2053 {
2054 frame->data = (void *)av;
2055 frame->prepare = prepare_nop;
2056 }
2057 else
2058 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
967 2060
968static void 2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
969api_schedule (void) 2062 frame->prepare = prepare_schedule;
970{ 2063 }
971 dTHX;
972 struct transfer_args ta;
973 2064
974 prepare_schedule (&ta); 2065 frame->check = slf_check_semaphore_down;
975 TRANSFER (ta);
976}
977 2066
978static void
979api_cede (void)
980{
981 dTHX;
982 struct transfer_args ta;
983
984 prepare_cede (&ta);
985 TRANSFER (ta);
986} 2067}
987 2068
988MODULE = Coro::State PACKAGE = Coro::State 2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
989 2070
990PROTOTYPES: DISABLE 2071PROTOTYPES: DISABLE
991 2072
992BOOT: 2073BOOT:
993{ 2074{
994#ifdef USE_ITHREADS 2075#ifdef USE_ITHREADS
995 MUTEX_INIT (&coro_mutex); 2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT;
2079# endif
996#endif 2080#endif
997 BOOT_PAGESIZE; 2081 BOOT_PAGESIZE;
998 2082
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2088 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2089
2090 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2091 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2092 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2093
999 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2094 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1000 2095
1001 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2096 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1002 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2097 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1003 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2098 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2099 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1004 2100
1005 main_mainstack = PL_mainstack; 2101 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env;
1006 2103
2104 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev;
2106
1007 coroapi.ver = CORO_API_VERSION; 2107 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION;
2109
1008 coroapi.transfer = api_transfer; 2110 coroapi.transfer = api_transfer;
2111
2112 coroapi.sv_state = SvSTATE_;
2113 coroapi.execute_slf = api_execute_slf;
2114 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself;
2118
2119 {
2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2121
2122 if (!svp) croak ("Time::HiRes is required");
2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2124
2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2126 }
1009 2127
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011} 2129}
1012 2130
1013SV * 2131SV *
1014new (char *klass, ...) 2132new (char *klass, ...)
1015 CODE: 2133 CODE:
1016{ 2134{
1017 struct coro *coro; 2135 struct coro *coro;
2136 MAGIC *mg;
1018 HV *hv; 2137 HV *hv;
1019 int i; 2138 int i;
1020 2139
1021 Newz (0, coro, 1, struct coro); 2140 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV (); 2141 coro->args = newAV ();
2142 coro->flags = CF_NEW;
1023 2143
2144 if (coro_first) coro_first->prev = coro;
2145 coro->next = coro_first;
2146 coro_first = coro;
2147
1024 hv = newHV (); 2148 coro->hv = hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027 2152
2153 av_extend (coro->args, items - 1);
1028 for (i = 1; i < items; i++) 2154 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i))); 2155 av_push (coro->args, newSVsv (ST (i)));
1030
1031 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1032 /*coro->stack = 0;*/
1033} 2156}
1034 OUTPUT: 2157 OUTPUT:
1035 RETVAL 2158 RETVAL
1036 2159
1037void 2160void
1038_set_stacklevel (...) 2161_set_stacklevel (...)
1039 ALIAS: 2162 CODE:
1040 Coro::State::transfer = 1 2163 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 2164
1102void 2165void
1103_clone_state_from (SV *dst, SV *src) 2166transfer (...)
2167 PROTOTYPE: $$
1104 CODE: 2168 CODE:
1105{ 2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1106 struct coro *coro_src = SvSTATE (src);
1107 2170
1108 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2171bool
1109 2172_destroy (SV *coro_sv)
1110 ++coro_src->refcnt; 2173 CODE:
1111 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112} 2175 OUTPUT:
2176 RETVAL
1113 2177
1114void 2178void
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) 2179_exit (int code)
1122 int code
1123 PROTOTYPE: $ 2180 PROTOTYPE: $
1124 CODE: 2181 CODE:
1125 _exit (code); 2182 _exit (code);
1126 2183
2184int
2185cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$
2187 CODE:
2188 RETVAL = cctx_stacksize;
2189 if (new_stacksize)
2190 {
2191 cctx_stacksize = new_stacksize;
2192 ++cctx_gen;
2193 }
2194 OUTPUT:
2195 RETVAL
2196
2197int
2198cctx_max_idle (int max_idle = 0)
2199 PROTOTYPE: ;$
2200 CODE:
2201 RETVAL = cctx_max_idle;
2202 if (max_idle > 1)
2203 cctx_max_idle = max_idle;
2204 OUTPUT:
2205 RETVAL
2206
2207int
2208cctx_count ()
2209 PROTOTYPE:
2210 CODE:
2211 RETVAL = cctx_count;
2212 OUTPUT:
2213 RETVAL
2214
2215int
2216cctx_idle ()
2217 PROTOTYPE:
2218 CODE:
2219 RETVAL = cctx_idle;
2220 OUTPUT:
2221 RETVAL
2222
2223void
2224list ()
2225 PROTOTYPE:
2226 PPCODE:
2227{
2228 struct coro *coro;
2229 for (coro = coro_first; coro; coro = coro->next)
2230 if (coro->hv)
2231 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2232}
2233
2234void
2235call (Coro::State coro, SV *coderef)
2236 ALIAS:
2237 eval = 1
2238 CODE:
2239{
2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2241 {
2242 struct coro temp;
2243
2244 if (!(coro->flags & CF_RUNNING))
2245 {
2246 PUTBACK;
2247 save_perl (aTHX_ &temp);
2248 load_perl (aTHX_ coro);
2249 }
2250
2251 {
2252 dSP;
2253 ENTER;
2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK;
2257 PUSHMARK (SP);
2258
2259 if (ix)
2260 eval_sv (coderef, 0);
2261 else
2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2263
2264 POPSTACK;
2265 SPAGAIN;
2266 FREETMPS;
2267 LEAVE;
2268 PUTBACK;
2269 }
2270
2271 if (!(coro->flags & CF_RUNNING))
2272 {
2273 save_perl (aTHX_ coro);
2274 load_perl (aTHX_ &temp);
2275 SPAGAIN;
2276 }
2277 }
2278}
2279
2280SV *
2281is_ready (Coro::State coro)
2282 PROTOTYPE: $
2283 ALIAS:
2284 is_ready = CF_READY
2285 is_running = CF_RUNNING
2286 is_new = CF_NEW
2287 is_destroyed = CF_DESTROYED
2288 CODE:
2289 RETVAL = boolSV (coro->flags & ix);
2290 OUTPUT:
2291 RETVAL
2292
2293void
2294throw (Coro::State self, SV *throw = &PL_sv_undef)
2295 PROTOTYPE: $;$
2296 CODE:
2297 SvREFCNT_dec (self->throw);
2298 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2299
2300void
2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags
2304
2305SV *
2306has_cctx (Coro::State coro)
2307 PROTOTYPE: $
2308 CODE:
2309 RETVAL = boolSV (!!coro->cctx);
2310 OUTPUT:
2311 RETVAL
2312
2313int
2314is_traced (Coro::State coro)
2315 PROTOTYPE: $
2316 CODE:
2317 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2318 OUTPUT:
2319 RETVAL
2320
2321UV
2322rss (Coro::State coro)
2323 PROTOTYPE: $
2324 ALIAS:
2325 usecount = 1
2326 CODE:
2327 switch (ix)
2328 {
2329 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2330 case 1: RETVAL = coro->usecount; break;
2331 }
2332 OUTPUT:
2333 RETVAL
2334
2335void
2336force_cctx ()
2337 PROTOTYPE:
2338 CODE:
2339 struct coro *coro = SvSTATE (coro_current);
2340 coro->cctx->idle_sp = 0;
2341
2342void
2343swap_defsv (Coro::State self)
2344 PROTOTYPE: $
2345 ALIAS:
2346 swap_defav = 1
2347 CODE:
2348 if (!self->slot)
2349 croak ("cannot swap state with coroutine that has no saved state,");
2350 else
2351 {
2352 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2353 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354
2355 SV *tmp = *src; *src = *dst; *dst = tmp;
2356 }
2357
1127MODULE = Coro::State PACKAGE = Coro 2358MODULE = Coro::State PACKAGE = Coro
1128 2359
1129BOOT: 2360BOOT:
1130{ 2361{
1131 int i; 2362 int i;
1132 2363
2364 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2367
2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2369 SvREADONLY_on (coro_current);
2370
1133 coro_stash = gv_stashpv ("Coro", TRUE); 2371 coro_stash = gv_stashpv ("Coro", TRUE);
1134 2372
1135 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1136 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1137 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1138 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1139 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2377 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1140 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2378 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1141 2379
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--; ) 2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1146 coro_ready[i] = newAV (); 2381 coro_ready[i] = newAV ();
1147 2382
1148 { 2383 {
1149 SV *sv = perl_get_sv("Coro::API", 1); 2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1150 2385
1151 coroapi.schedule = api_schedule; 2386 coroapi.schedule = api_schedule;
1152 coroapi.cede = api_cede; 2387 coroapi.cede = api_cede;
2388 coroapi.cede_notself = api_cede_notself;
1153 coroapi.ready = api_ready; 2389 coroapi.ready = api_ready;
2390 coroapi.is_ready = api_is_ready;
1154 coroapi.nready = &coro_nready; 2391 coroapi.nready = coro_nready;
1155 coroapi.current = coro_current; 2392 coroapi.current = coro_current;
1156 2393
1157 GCoroAPI = &coroapi; 2394 GCoroAPI = &coroapi;
1158 sv_setiv (sv, (IV)&coroapi); 2395 sv_setiv (sv, (IV)&coroapi);
1159 SvREADONLY_on (sv); 2396 SvREADONLY_on (sv);
1160 } 2397 }
1161} 2398}
1162 2399
2400void
2401schedule (...)
2402 CODE:
2403 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2404
2405void
2406cede (...)
2407 CODE:
2408 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2409
2410void
2411cede_notself (...)
2412 CODE:
2413 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2414
2415void
2416_set_current (SV *current)
2417 PROTOTYPE: $
2418 CODE:
2419 SvREFCNT_dec (SvRV (coro_current));
2420 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2421
2422void
2423_set_readyhook (SV *hook)
2424 PROTOTYPE: $
2425 CODE:
2426 LOCK;
2427 SvREFCNT_dec (coro_readyhook);
2428 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2429 UNLOCK;
2430
1163int 2431int
1164prio (Coro::State coro, int newprio = 0) 2432prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$
1165 ALIAS: 2434 ALIAS:
1166 nice = 1 2435 nice = 1
1167 CODE: 2436 CODE:
1168{ 2437{
1169 RETVAL = coro->prio; 2438 RETVAL = coro->prio;
1170 2439
1171 if (items > 1) 2440 if (items > 1)
1172 { 2441 {
1173 if (ix) 2442 if (ix)
1174 newprio += coro->prio; 2443 newprio = coro->prio - newprio;
1175 2444
1176 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2445 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1177 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2446 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1178 2447
1179 coro->prio = newprio; 2448 coro->prio = newprio;
1180 } 2449 }
1181} 2450}
2451 OUTPUT:
2452 RETVAL
1182 2453
1183void 2454SV *
1184ready (SV *self) 2455ready (SV *self)
1185 PROTOTYPE: $ 2456 PROTOTYPE: $
1186 CODE: 2457 CODE:
1187 api_ready (self); 2458 RETVAL = boolSV (api_ready (aTHX_ self));
2459 OUTPUT:
2460 RETVAL
1188 2461
1189int 2462int
1190nready (...) 2463nready (...)
1191 PROTOTYPE: 2464 PROTOTYPE:
1192 CODE: 2465 CODE:
1193 RETVAL = coro_nready; 2466 RETVAL = coro_nready;
1194 OUTPUT: 2467 OUTPUT:
1195 RETVAL 2468 RETVAL
1196 2469
1197MODULE = Coro::State PACKAGE = Coro::AIO 2470# for async_pool speedup
2471void
2472_pool_1 (SV *cb)
2473 CODE:
2474{
2475 struct coro *coro = SvSTATE (coro_current);
2476 HV *hv = (HV *)SvRV (coro_current);
2477 AV *defav = GvAV (PL_defgv);
2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479 AV *invoke_av;
2480 int i, len;
2481
2482 if (!invoke)
2483 {
2484 SV *old = PL_diehook;
2485 PL_diehook = 0;
2486 SvREFCNT_dec (old);
2487 croak ("\3async_pool terminate\2\n");
2488 }
2489
2490 SvREFCNT_dec (coro->saved_deffh);
2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2492
2493 hv_store (hv, "desc", sizeof ("desc") - 1,
2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2495
2496 invoke_av = (AV *)SvRV (invoke);
2497 len = av_len (invoke_av);
2498
2499 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2500
2501 if (len > 0)
2502 {
2503 av_fill (defav, len - 1);
2504 for (i = 0; i < len; ++i)
2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2506 }
2507}
2508
2509void
2510_pool_2 (SV *cb)
2511 CODE:
2512{
2513 struct coro *coro = SvSTATE (coro_current);
2514
2515 sv_setsv (cb, &PL_sv_undef);
2516
2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518 coro->saved_deffh = 0;
2519
2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2521 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2522 {
2523 SV *old = PL_diehook;
2524 PL_diehook = 0;
2525 SvREFCNT_dec (old);
2526 croak ("\3async_pool terminate\2\n");
2527 }
2528
2529 av_clear (GvAV (PL_defgv));
2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532
2533 coro->prio = 0;
2534
2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536 api_trace (aTHX_ coro_current, 0);
2537
2538 av_push (av_async_pool, newSVsv (coro_current));
2539}
2540
2541#if 0
2542
2543void
2544_generator_call (...)
2545 PROTOTYPE: @
2546 PPCODE:
2547 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548 xxxx
2549 abort ();
1198 2550
1199SV * 2551SV *
1200_get_state () 2552gensub (SV *sub, ...)
1201 CODE: 2553 PROTOTYPE: &;@
2554 CODE:
1202{ 2555{
1203 struct { 2556 struct coro *coro;
1204 int errorno; 2557 MAGIC *mg;
1205 int laststype; 2558 CV *xcv;
1206 int laststatval; 2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1207 Stat_t statcache; 2560 int i;
1208 } data;
1209 2561
1210 data.errorno = errno; 2562 CvGV (ncv) = CvGV (cv);
1211 data.laststype = PL_laststype; 2563 CvFILE (ncv) = CvFILE (cv);
1212 data.laststatval = PL_laststatval;
1213 data.statcache = PL_statcache;
1214 2564
1215 RETVAL = newSVpvn ((char *)&data, sizeof data); 2565 Newz (0, coro, 1, struct coro);
2566 coro->args = newAV ();
2567 coro->flags = CF_NEW;
2568
2569 av_extend (coro->args, items - 1);
2570 for (i = 1; i < items; i++)
2571 av_push (coro->args, newSVsv (ST (i)));
2572
2573 CvISXSUB_on (ncv);
2574 CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578 CvXSUB (ncv) = CvXSUB (xcv);
2579 CvANON_on (ncv);
2580
2581 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582 RETVAL = newRV_noinc ((SV *)ncv);
1216} 2583}
1217 OUTPUT: 2584 OUTPUT:
1218 RETVAL 2585 RETVAL
1219 2586
2587#endif
2588
2589
2590MODULE = Coro::State PACKAGE = Coro::AIO
2591
1220void 2592void
1221_set_state (char *data_) 2593_get_state (SV *self)
1222 PROTOTYPE: $ 2594 PROTOTYPE: $
2595 PPCODE:
2596{
2597 AV *defav = GvAV (PL_defgv);
2598 AV *av = newAV ();
2599 int i;
2600 SV *data_sv = newSV (sizeof (struct io_state));
2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2602 SvCUR_set (data_sv, sizeof (struct io_state));
2603 SvPOK_only (data_sv);
2604
2605 data->errorno = errno;
2606 data->laststype = PL_laststype;
2607 data->laststatval = PL_laststatval;
2608 data->statcache = PL_statcache;
2609
2610 av_extend (av, AvFILLp (defav) + 1 + 1);
2611
2612 for (i = 0; i <= AvFILLp (defav); ++i)
2613 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2614
2615 av_push (av, data_sv);
2616
2617 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619 api_ready (aTHX_ self);
2620}
2621
2622void
2623_set_state (SV *state)
2624 PROTOTYPE: $
2625 PPCODE:
2626{
2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
2630
2631 errno = data->errorno;
2632 PL_laststype = data->laststype;
2633 PL_laststatval = data->laststatval;
2634 PL_statcache = data->statcache;
2635
2636 EXTEND (SP, AvFILLp (av));
2637 for (i = 0; i < AvFILLp (av); ++i)
2638 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639}
2640
2641
2642MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644BOOT:
2645 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647SV *
2648_schedule (...)
1223 CODE: 2649 CODE:
1224{ 2650{
1225 struct { 2651 static int incede;
2652
2653 api_cede_notself (aTHX);
2654
2655 ++incede;
2656 while (coro_nready >= incede && api_cede (aTHX))
2657 ;
2658
2659 sv_setsv (sv_activity, &PL_sv_undef);
2660 if (coro_nready >= incede)
2661 {
2662 PUSHMARK (SP);
2663 PUTBACK;
2664 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665 SPAGAIN;
2666 }
2667
2668 --incede;
2669}
2670
2671
2672MODULE = Coro::State PACKAGE = PerlIO::cede
2673
2674BOOT:
2675 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676
2677MODULE = Coro::State PACKAGE = Coro::Semaphore
2678
2679SV *
2680new (SV *klass, SV *count_ = 0)
2681 CODE:
2682{
2683 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2684 AV *av = newAV ();
2685 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2686 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2687}
2688 OUTPUT:
2689 RETVAL
2690
2691SV *
2692count (SV *self)
2693 CODE:
2694 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2695 OUTPUT:
2696 RETVAL
2697
2698void
2699up (SV *self, int adjust = 1)
2700 ALIAS:
2701 adjust = 1
2702 CODE:
2703{
2704 AV *av = (AV *)SvRV (self);
2705 SV *count_sv = AvARRAY (av)[0];
2706 IV count = SvIVX (count_sv);
2707
2708 count += ix ? adjust : 1;
2709 SvIVX (count_sv) = count;
2710
2711 /* now wake up as many waiters as possible */
2712 while (count > 0 && AvFILLp (av) >= count)
2713 {
2714 SV *cb;
2715
2716 /* swap first two elements so we can shift a waiter */
2717 AvARRAY (av)[0] = AvARRAY (av)[1];
2718 AvARRAY (av)[1] = count_sv;
2719 cb = av_shift (av);
2720
2721 if (SvOBJECT (cb))
2722 api_ready (cb);
2723 else
2724 croak ("callbacks not yet supported");
2725
2726 SvREFCNT_dec (cb);
2727 }
2728}
2729
2730void
2731down (SV *self)
2732 CODE:
2733 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
1226 int errorno; 2763 int i;
1227 int laststype; 2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
1228 int laststatval; 2765 for (i = 1; i <= AvFILLp (av); ++i)
1229 Stat_t statcache; 2766 PUSHs (newSVsv (AvARRAY (av)[i]));
1230 } *data = (void *)data_; 2767 }
1231
1232 errno = data->errorno;
1233 PL_laststype = data->laststype;
1234 PL_laststatval = data->laststatval;
1235 PL_statcache = data->statcache;
1236} 2768}
2769

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