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Comparing Coro/Coro/State.xs (file contents):
Revision 1.91 by root, Sat Nov 25 01:14:11 2006 UTC vs.
Revision 1.256 by root, Sat Nov 8 13:32:18 2008 UTC

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

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