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Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.264 by root, Fri Nov 14 02:29:09 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
33 105
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 107# undef CORO_STACKGUARD
36#endif 108#endif
37 109
38#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 111# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
122#define STACKLEVEL ((void *)&stacklevel)
123
124#define IN_DESTRUCT (PL_main_cv == Nullcv)
125
126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
130#else
131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
138
139#define NOINLINE attribute ((noinline))
140
141#include "CoroAPI.h"
142
143#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
51# endif 150# 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
61 151
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 152#else
153
80# define LOCK (void)0 154# define LOCK (void)0
81# define UNLOCK (void)0 155# define UNLOCK (void)0
82#endif
83 156
157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163
164/* helper storage struct for Coro::AIO */
165struct io_state
166{
167 AV *res;
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 181static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
88 184
89/* this is actually not just the c stack but also c registers etc... */ 185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
203
204static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
215
216/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 217typedef struct coro_cctx {
91 struct coro_stack *next; 218 struct coro_cctx *next;
92 219
93 void *idle_sp; 220 /* the stack */
94 void *sptr; 221 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 222 size_t ssize;
96 223
97 /* cpu state */ 224 /* cpu state */
225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
227 JMPENV *top_env;
98 coro_context cctx; 228 coro_context cctx;
99} coro_stack;
100 229
101static coro_stack *main_stack; 230 U32 gen;
231#if CORO_USE_VALGRIND
232 int valgrind_id;
233#endif
234 unsigned char flags;
235} coro_cctx;
102 236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct {
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is a structure representing a perl-level coroutine */
103struct coro { 258struct coro {
104 /* optionally saved, might be zero */ 259 /* the c coroutine allocated to this perl coroutine, if any */
105 AV *defav; 260 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;
112 261
113 /* the c stack, if any */ 262 /* 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; 263 AV *mainstack;
120 SV **stack_sp; 264 perl_slots *slot; /* basically the saved sp */
121 OP *op; 265
122 SV **curpad; 266 AV *args; /* data associated with this coroutine (initial args) */
123 AV *comppad; 267 int refcnt; /* coroutines are refcounted, yes */
124 CV *compcv; 268 int flags; /* CF_ flags */
125 SV **stack_base; 269 HV *hv; /* the perl hash associated with this coro, if any */
126 SV **stack_max; 270
127 SV **tmps_stack; 271 /* statistics */
128 I32 tmps_floor; 272 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;
146 273
147 /* coro process data */ 274 /* coro process data */
148 int prio; 275 int prio;
276 SV *throw; /* exception to be thrown */
149 277
150 /* data associated with this coroutine (initial args) */ 278 /* async_pool */
151 AV *args; 279 SV *saved_deffh;
152 int refcnt; 280
281 /* linked list */
282 struct coro *next, *prev;
153}; 283};
154 284
155typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
157 287
288/** Coro ********************************************************************/
289
290#define PRIO_MAX 3
291#define PRIO_HIGH 1
292#define PRIO_NORMAL 0
293#define PRIO_LOW -1
294#define PRIO_IDLE -3
295#define PRIO_MIN -4
296
297/* for Coro.pm */
298static SV *coro_current;
299static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301static int coro_nready;
302static struct coro *coro_first;
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
308{
309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
158static AV * 336static AV *
159coro_clone_padlist (pTHX_ CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
160{ 338{
161 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
163 341
164 newpadlist = newAV (); 342 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 348#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 350 --AvFILLp (padlist);
173 351
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
176 354
177 return newpadlist; 355 return newpadlist;
178} 356}
179 357
… …
209 387
210 /* casting is fun. */ 388 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 390 free_padlist (aTHX_ padlist);
213 391
214 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 393
216 return 0; 394 return 0;
217} 395}
218 396
219#define PERL_MAGIC_coro PERL_MAGIC_ext 397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 399
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222 440
223/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
224static void 442static void
225get_padlist (pTHX_ CV *cv) 443get_padlist (pTHX_ CV *cv)
226{ 444{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
228 447
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 450 else
232 { 451 {
233#if 0 452#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 455 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
239#else 459#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 463}
244 464
245static void 465static void
246put_padlist (pTHX_ CV *cv) 466put_padlist (pTHX_ CV *cv)
247{ 467{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
249 470
250 if (!mg) 471 if (expect_false (!mg))
251 { 472 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 }
257 473
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 474 av = (AV *)mg->mg_obj;
259}
260 475
261#define SB do { 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 477 av_extend (av, AvMAX (av) + 1);
263 478
264#define LOAD(state) load_state(aTHX_ (state)); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 480}
266 481
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 482/** load & save, init *******************************************************/
268 483
269static void 484static void
270load_state(pTHX_ Coro__State c) 485load_perl (pTHX_ Coro__State c)
271{ 486{
272 PL_dowarn = c->dowarn; 487 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 488 c->slot = 0;
274 489
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 490 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;
306 491
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 492 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 493 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
497 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h"
499 #undef VAR
310 500
311 { 501 {
312 dSP; 502 dSP;
503
313 CV *cv; 504 CV *cv;
314 505
315 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
317 { 508 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 510 CvDEPTH (cv) = PTR2IV (POPs);
324 } 511 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 512 }
328 513
329 PUTBACK; 514 PUTBACK;
330 } 515 }
331} 516}
332 517
333static void 518static void
334save_state(pTHX_ Coro__State c, int flags) 519save_perl (pTHX_ Coro__State c)
335{ 520{
336 { 521 {
337 dSP; 522 dSP;
338 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
342 /* 527 /*
343 * the worst thing you can imagine happens first - we have to save 528 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
345 */ 530 */
346 531
347 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
349 for (;;) 534 for (;;)
350 { 535 {
351 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
352 { 537 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
354 539
355 if (CxTYPE(cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 541 {
357 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
543
358 if (CvDEPTH(cv)) 544 if (expect_true (CvDEPTH (cv)))
359 { 545 {
360 EXTEND (SP, CvDEPTH(cv)*2); 546 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)); 547 PUSHs ((SV *)CvPADLIST (cv));
548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
371 550
551 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 552 get_padlist (aTHX_ cv);
373 } 553 }
374 } 554 }
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 } 555 }
384 556
385 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 558 break;
387 559
388 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
391 } 563 }
392 564
393 PUTBACK; 565 PUTBACK;
394 } 566 }
395 567
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 579
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; 580 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 581
407 c->op = PL_op; 582 {
408 c->curpad = PL_curpad; 583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 584
410 c->compcv = PL_compcv; 585 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 586 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 587 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 588 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 589
415 c->tmps_ix = PL_tmps_ix; 590 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 591 # include "state.h"
417 c->markstack = PL_markstack; 592 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 593 }
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} 594}
435 595
436/* 596/*
437 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
441 */ 601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
442static void 605static void
443coro_init_stacks (pTHX) 606coro_init_stacks (pTHX)
444{ 607{
445 LOCK; 608 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; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 612
452 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 616
456 New(50,PL_tmps_stack,96,SV*); 617 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 620 PL_tmps_max = 32;
460 621
461 New(54,PL_markstack,16,I32); 622 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 624 PL_markstack_max = PL_markstack + 16;
464 625
465#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
467#endif 628#endif
468 629
469 New(54,PL_scopestack,16,I32); 630 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 632 PL_scopestack_max = 8;
472 633
473 New(54,PL_savestack,96,ANY); 634 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 636 PL_savestack_max = 24;
476 637
477#if PERL_VERSION < 9 638#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 639 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 641 PL_retstack_max = 4;
481#endif 642#endif
482
483 UNLOCK;
484} 643}
644#endif
485 645
486/* 646/*
487 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
488 */ 648 */
489static void 649static void
490destroy_stacks(pTHX) 650coro_destruct_stacks (pTHX)
491{ 651{
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) 652 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
505 654
506 while (PL_curstackinfo) 655 while (PL_curstackinfo)
507 { 656 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
509 658
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 659 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 660 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 661
522 Safefree (PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 663 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 664 PL_curstackinfo = p;
525 } 665 }
526 666
527 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 668 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 670 Safefree (PL_savestack);
531#if PERL_VERSION < 9 671#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 672 Safefree (PL_retstack);
533#endif 673#endif
534} 674}
535 675
676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 }
711 }
712
713 return rss;
714}
715
716/** coroutine stack handling ************************************************/
717
718static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
719static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
720static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
721
722/* apparently < 5.8.8 */
723#ifndef MgPV_nolen_const
724#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
725 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
726 (const char*)(mg)->mg_ptr)
727#endif
728
729/* we sometimes need to create the effect of entersub calling us */
730#define SSL_HEAD (void)0
731/* we somtimes need to create the effect of leaving via entersub */
732#define SSL_TAIL (void)0
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
536static void 813static void
537setup_coro (struct coro *coro) 814coro_setup (pTHX_ struct coro *coro)
538{ 815{
539 /* 816 /*
540 * emulate part of the perl startup here. 817 * emulate part of the perl startup here.
541 */ 818 */
542 dTHX; 819 coro_init_stacks (aTHX);
820
821 PL_runops = RUNOPS_DEFAULT;
822 PL_curcop = &PL_compiling;
823 PL_in_eval = EVAL_NULL;
824 PL_comppad = 0;
825 PL_curpm = 0;
826 PL_curpad = 0;
827 PL_localizing = 0;
828 PL_dirty = 0;
829 PL_restartop = 0;
830#if PERL_VERSION_ATLEAST (5,10,0)
831 PL_parser = 0;
832#endif
833
834 /* recreate the die/warn hooks */
835 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
836 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
837
838 GvSV (PL_defgv) = newSV (0);
839 GvAV (PL_defgv) = coro->args; coro->args = 0;
840 GvSV (PL_errgv) = newSV (0);
841 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
842 PL_rs = newSVsv (GvSV (irsgv));
843 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
844
845 {
846 dSP;
847 UNOP myop;
848
849 Zero (&myop, 1, UNOP);
850 myop.op_next = Nullop;
851 myop.op_flags = OPf_WANT_VOID;
852
853 PUSHMARK (SP);
854 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
855 PUTBACK;
856 PL_op = (OP *)&myop;
857 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
858 SPAGAIN;
859 }
860
861 /* this newly created coroutine might be run on an existing cctx which most
862 * likely was suspended in set_stacklevel, called from entersub.
863 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
864 * so we ENTER here for symmetry.
865 */
866 SSL_HEAD;
867}
868
869static void
870coro_destruct (pTHX_ struct coro *coro)
871{
872 if (!IN_DESTRUCT)
873 {
874 /* restore all saved variables and stuff */
875 LEAVE_SCOPE (0);
876 assert (PL_tmps_floor == -1);
877
878 /* free all temporaries */
879 FREETMPS;
880 assert (PL_tmps_ix == -1);
881
882 /* unwind all extra stacks */
883 POPSTACK_TO (PL_mainstack);
884
885 /* unwind main stack */
886 dounwind (-1);
887 }
888
889 SvREFCNT_dec (GvSV (PL_defgv));
890 SvREFCNT_dec (GvAV (PL_defgv));
891 SvREFCNT_dec (GvSV (PL_errgv));
892 SvREFCNT_dec (PL_defoutgv);
893 SvREFCNT_dec (PL_rs);
894 SvREFCNT_dec (GvSV (irsgv));
895
896 SvREFCNT_dec (PL_diehook);
897 SvREFCNT_dec (PL_warnhook);
898
899 SvREFCNT_dec (coro->saved_deffh);
900 SvREFCNT_dec (coro->throw);
901
902 coro_destruct_stacks (aTHX);
903}
904
905INLINE void
906free_coro_mortal (pTHX)
907{
908 if (expect_true (coro_mortal))
909 {
910 SvREFCNT_dec (coro_mortal);
911 coro_mortal = 0;
912 }
913}
914
915static int
916runops_trace (pTHX)
917{
918 COP *oldcop = 0;
919 int oldcxix = -2;
920 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
921 coro_cctx *cctx = coro->cctx;
922
923 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
924 {
925 PERL_ASYNC_CHECK ();
926
927 if (cctx->flags & CC_TRACE_ALL)
928 {
929 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
930 {
931 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
932 SV **bot, **top;
933 AV *av = newAV (); /* return values */
934 SV **cb;
935 dSP;
936
937 GV *gv = CvGV (cx->blk_sub.cv);
938 SV *fullname = sv_2mortal (newSV (0));
939 if (isGV (gv))
940 gv_efullname3 (fullname, gv, 0);
941
942 bot = PL_stack_base + cx->blk_oldsp + 1;
943 top = cx->blk_gimme == G_ARRAY ? SP + 1
944 : cx->blk_gimme == G_SCALAR ? bot + 1
945 : bot;
946
947 av_extend (av, top - bot);
948 while (bot < top)
949 av_push (av, SvREFCNT_inc_NN (*bot++));
950
951 PL_runops = RUNOPS_DEFAULT;
952 ENTER;
953 SAVETMPS;
954 EXTEND (SP, 3);
955 PUSHMARK (SP);
956 PUSHs (&PL_sv_no);
957 PUSHs (fullname);
958 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
959 PUTBACK;
960 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
961 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
962 SPAGAIN;
963 FREETMPS;
964 LEAVE;
965 PL_runops = runops_trace;
966 }
967
968 if (oldcop != PL_curcop)
969 {
970 oldcop = PL_curcop;
971
972 if (PL_curcop != &PL_compiling)
973 {
974 SV **cb;
975
976 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
977 {
978 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
979
980 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
981 {
982 runops_proc_t old_runops = PL_runops;
983 dSP;
984 GV *gv = CvGV (cx->blk_sub.cv);
985 SV *fullname = sv_2mortal (newSV (0));
986
987 if (isGV (gv))
988 gv_efullname3 (fullname, gv, 0);
989
990 PL_runops = RUNOPS_DEFAULT;
991 ENTER;
992 SAVETMPS;
993 EXTEND (SP, 3);
994 PUSHMARK (SP);
995 PUSHs (&PL_sv_yes);
996 PUSHs (fullname);
997 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
998 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN;
1002 FREETMPS;
1003 LEAVE;
1004 PL_runops = runops_trace;
1005 }
1006
1007 oldcxix = cxstack_ix;
1008 }
1009
1010 if (cctx->flags & CC_TRACE_LINE)
1011 {
1012 dSP;
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PL_runops = RUNOPS_DEFAULT;
1019 PUSHMARK (SP);
1020 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1021 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030 }
1031 }
1032 }
1033 }
1034
1035 TAINT_NOT;
1036 return 0;
1037}
1038
1039static void
1040prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1041{
1042 ta->prev = (struct coro *)cctx;
1043 ta->next = 0;
1044}
1045
1046/* inject a fake call to Coro::State::_cctx_init into the execution */
1047/* _cctx_init should be careful, as it could be called at almost any time */
1048/* during execution of a perl program */
1049/* also initialises PL_top_env */
1050static void NOINLINE
1051cctx_prepare (pTHX_ coro_cctx *cctx)
1052{
543 dSP; 1053 dSP;
544 UNOP myop; 1054 UNOP myop;
545 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546 1055
547 coro_init_stacks (aTHX); 1056 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 1057
553 SPAGAIN; 1058 if (cctx->flags & CC_TRACE)
1059 PL_runops = runops_trace;
554 1060
555 Zero (&myop, 1, UNOP); 1061 Zero (&myop, 1, UNOP);
556 myop.op_next = Nullop; 1062 myop.op_next = PL_op;
557 myop.op_flags = OPf_WANT_VOID; 1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558 1064
1065 PUSHMARK (SP);
1066 EXTEND (SP, 2);
1067 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1068 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1069 PUTBACK;
559 PL_op = (OP *)&myop; 1070 PL_op = (OP *)&myop;
560
561 PUSHMARK(SP);
562 XPUSHs (sub_init);
563 PUTBACK;
564 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565 SPAGAIN; 1072 SPAGAIN;
566
567 ENTER; /* necessary e.g. for dounwind */
568} 1073}
569 1074
1075/* the tail of transfer: execute stuff we can only do after a transfer */
1076INLINE void
1077transfer_tail (pTHX)
1078{
1079 struct coro *next = (struct coro *)transfer_next;
1080 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1082
1083 free_coro_mortal (aTHX);
1084 UNLOCK;
1085
1086 if (expect_false (next->throw))
1087 {
1088 SV *exception = sv_2mortal (next->throw);
1089
1090 next->throw = 0;
1091 sv_setsv (ERRSV, exception);
1092 croak (0);
1093 }
1094}
1095
1096/*
1097 * this is a _very_ stripped down perl interpreter ;)
1098 */
570static void 1099static void
1100cctx_run (void *arg)
1101{
1102#ifdef USE_ITHREADS
1103# if CORO_PTHREAD
1104 PERL_SET_CONTEXT (coro_thx);
1105# endif
1106#endif
1107 {
1108 dTHX;
1109
1110 /* entersub called ENTER, but we never 'returned', undo that here */
1111 SSL_TAIL;
1112
1113 /* we now skip the op that did lead to transfer() */
1114 PL_op = PL_op->op_next;
1115
1116 /* inject a fake subroutine call to cctx_init */
1117 cctx_prepare (aTHX_ (coro_cctx *)arg);
1118
1119 /* cctx_run is the alternative tail of transfer() */
571transfer_tail () 1120 transfer_tail (aTHX);
1121
1122 /* somebody or something will hit me for both perl_run and PL_restartop */
1123 PL_restartop = PL_op;
1124 perl_run (PL_curinterp);
1125
1126 /*
1127 * If perl-run returns we assume exit() was being called or the coro
1128 * fell off the end, which seems to be the only valid (non-bug)
1129 * reason for perl_run to return. We try to exit by jumping to the
1130 * bootstrap-time "top" top_env, as we cannot restore the "main"
1131 * coroutine as Coro has no such concept
1132 */
1133 PL_top_env = main_top_env;
1134 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1135 }
1136}
1137
1138static coro_cctx *
1139cctx_new ()
572{ 1140{
573 if (coro_mortal) 1141 coro_cctx *cctx;
574 { 1142
575 SvREFCNT_dec (coro_mortal); 1143 ++cctx_count;
576 coro_mortal = 0; 1144 New (0, cctx, 1, coro_cctx);
1145
1146 cctx->gen = cctx_gen;
1147 cctx->flags = 0;
1148 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1149
1150 return cctx;
1151}
1152
1153/* create a new cctx only suitable as source */
1154static coro_cctx *
1155cctx_new_empty ()
1156{
1157 coro_cctx *cctx = cctx_new ();
1158
1159 cctx->sptr = 0;
1160 coro_create (&cctx->cctx, 0, 0, 0, 0);
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx suitable as destination/running a perl interpreter */
1166static coro_cctx *
1167cctx_new_run ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170 void *stack_start;
1171 size_t stack_size;
1172
1173#if HAVE_MMAP
1174 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1175 /* mmap supposedly does allocate-on-write for us */
1176 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1177
1178 if (cctx->sptr != (void *)-1)
577 } 1179 {
1180 #if CORO_STACKGUARD
1181 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1182 #endif
1183 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1184 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1185 cctx->flags |= CC_MAPPED;
1186 }
1187 else
1188#endif
1189 {
1190 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1191 New (0, cctx->sptr, cctx_stacksize, long);
578 1192
579 UNLOCK; 1193 if (!cctx->sptr)
1194 {
1195 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1196 _exit (EXIT_FAILURE);
1197 }
1198
1199 stack_start = cctx->sptr;
1200 stack_size = cctx->ssize;
1201 }
1202
1203 #if CORO_USE_VALGRIND
1204 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1205 #endif
1206
1207 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1208
1209 return cctx;
580} 1210}
581 1211
582static void 1212static void
583coro_run (void *arg) 1213cctx_destroy (coro_cctx *cctx)
584{ 1214{
585 /* 1215 if (!cctx)
586 * this is a _very_ stripped down perl interpreter ;) 1216 return;
587 */
588 dTHX;
589 1217
590 transfer_tail (); 1218 --cctx_count;
1219 coro_destroy (&cctx->cctx);
591 1220
592 PL_top_env = &PL_start_env; 1221 /* coro_transfer creates new, empty cctx's */
593 PL_restartop = PL_op->op_next; 1222 if (cctx->sptr)
594 /* somebody will hit me for both perl_run and PL_restart_top */ 1223 {
595 perl_run (aTHX_ PERL_GET_CONTEXT); 1224 #if CORO_USE_VALGRIND
596 1225 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
597 abort (); 1226 #endif
598}
599
600static coro_stack *
601stack_new ()
602{
603 coro_stack *stack;
604
605 New (0, stack, 1, coro_stack);
606 1227
607#if HAVE_MMAP 1228#if HAVE_MMAP
608 1229 if (cctx->flags & CC_MAPPED)
609 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 1230 munmap (cctx->sptr, cctx->ssize);
610 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1231 else
611 1232#endif
612 if (stack->sptr == (void *)-1) 1233 Safefree (cctx->sptr);
613 { 1234 }
614 fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n"); 1235
615 _exit (EXIT_FAILURE); 1236 Safefree (cctx);
1237}
1238
1239/* wether this cctx should be destructed */
1240#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1241
1242static coro_cctx *
1243cctx_get (pTHX)
1244{
1245 while (expect_true (cctx_first))
616 } 1246 {
1247 coro_cctx *cctx = cctx_first;
1248 cctx_first = cctx->next;
1249 --cctx_idle;
617 1250
618 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1251 if (expect_true (!CCTX_EXPIRED (cctx)))
1252 return cctx;
619 1253
620#else 1254 cctx_destroy (cctx);
621
622 stack->ssize = STACKSIZE * (long)sizeof (long);
623 New (0, stack->sptr, STACKSIZE, long);
624
625 if (!stack->sptr)
626 { 1255 }
627 fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628 _exit (EXIT_FAILURE);
629 }
630 1256
631#endif 1257 return cctx_new_run ();
632
633 coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635 return stack;
636} 1258}
637 1259
638static void 1260static void
639stack_free (coro_stack *stack) 1261cctx_put (coro_cctx *cctx)
640{ 1262{
641 if (!stack || stack == main_stack) 1263 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
642 return;
643 1264
644#if HAVE_MMAP 1265 /* free another cctx if overlimit */
645 munmap (stack->sptr, stack->ssize); 1266 if (expect_false (cctx_idle >= cctx_max_idle))
646#else 1267 {
647 Safefree (stack->sptr); 1268 coro_cctx *first = cctx_first;
648#endif 1269 cctx_first = first->next;
1270 --cctx_idle;
649 1271
650 Safefree (stack); 1272 cctx_destroy (first);
651} 1273 }
652 1274
653static coro_stack *stack_first; 1275 ++cctx_idle;
1276 cctx->next = cctx_first;
1277 cctx_first = cctx;
1278}
1279
1280/** coroutine switching *****************************************************/
654 1281
655static void 1282static void
656stack_get (struct coro *coro) 1283transfer_check (pTHX_ struct coro *prev, struct coro *next)
657{ 1284{
658 if (stack_first) 1285 if (expect_true (prev != next))
659 {
660 coro->stack = stack_first;
661 stack_first = stack_first->next;
662 } 1286 {
663 else 1287 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
664 coro->stack = stack_new (); 1288 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
665}
666 1289
667static void 1290 if (expect_false (next->flags & CF_RUNNING))
668stack_put (coro_stack *stack) 1291 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
669{
670 stack->next = stack_first;
671 stack_first = stack;
672}
673 1292
674/* never call directly, always through the coro_state_transfer global variable */ 1293 if (expect_false (next->flags & CF_DESTROYED))
675static void 1294 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1295
1296#if !PERL_VERSION_ATLEAST (5,10,0)
1297 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1298 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1299#endif
1300 }
1301}
1302
1303/* always use the TRANSFER macro */
1304static void NOINLINE
676transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1305transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
677{ 1306{
678 dSTACKLEVEL; 1307 dSTACKLEVEL;
679 1308
680 /* sometimes transfer is only called to set idle_sp */ 1309 /* sometimes transfer is only called to set idle_sp */
681 if (!prev->stack->idle_sp) 1310 if (expect_false (!next))
682 prev->stack->idle_sp = stacklevel; 1311 {
683 1312 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684 LOCK; 1313 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685
686 if (prev != next)
687 { 1314 }
688 coro_stack *prev_stack = prev->stack; 1315 else if (expect_true (prev != next))
1316 {
1317 coro_cctx *prev__cctx;
689 1318
690 /* possibly "free" the stack */ 1319 if (expect_false (prev->flags & CF_NEW))
691 if (prev_stack->idle_sp == stacklevel)
692 { 1320 {
693 stack_put (prev_stack); 1321 /* create a new empty/source context */
694 prev->stack = 0; 1322 prev->cctx = cctx_new_empty ();
1323 prev->flags &= ~CF_NEW;
1324 prev->flags |= CF_RUNNING;
695 } 1325 }
696 1326
697 if (next->mainstack) 1327 prev->flags &= ~CF_RUNNING;
1328 next->flags |= CF_RUNNING;
1329
1330 LOCK;
1331
1332 /* first get rid of the old state */
1333 save_perl (aTHX_ prev);
1334
1335 if (expect_false (next->flags & CF_NEW))
698 { 1336 {
699 /* coroutine already started */ 1337 /* need to start coroutine */
700 SAVE (prev, flags); 1338 next->flags &= ~CF_NEW;
701 LOAD (next); 1339 /* setup coroutine call */
1340 coro_setup (aTHX_ next);
702 } 1341 }
703 else 1342 else
1343 load_perl (aTHX_ next);
1344
1345 prev__cctx = prev->cctx;
1346
1347 /* possibly untie and reuse the cctx */
1348 if (expect_true (
1349 prev__cctx->idle_sp == STACKLEVEL
1350 && !(prev__cctx->flags & CC_TRACE)
1351 && !force_cctx
1352 ))
704 { 1353 {
705 /* need to start coroutine */ 1354 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
706 /* first get rid of the old state */ 1355 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
707 SAVE (prev, -1); 1356
708 /* setup coroutine call */ 1357 prev->cctx = 0;
709 setup_coro (next); 1358
710 /* need to change stack from main_stack to real one */ 1359 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
711 next->stack = 0; 1360 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1361 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1362 if (!next->cctx)
1363 next->cctx = cctx_get (aTHX);
1364
1365 cctx_put (prev__cctx);
712 } 1366 }
713 1367
714 if (!next->stack) 1368 ++next->usecount;
715 stack_get (next);
716 1369
717 if (prev_stack != next->stack) 1370 if (expect_true (!next->cctx))
1371 next->cctx = cctx_get (aTHX);
1372
1373 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1374 transfer_next = next;
1375
1376 if (expect_false (prev__cctx != next->cctx))
1377 {
1378 prev__cctx->top_env = PL_top_env;
1379 PL_top_env = next->cctx->top_env;
718 coro_transfer (&prev_stack->cctx, &next->stack->cctx); 1380 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
719 } 1381 }
720 1382
721 transfer_tail (); 1383 transfer_tail (aTHX);
1384 }
722} 1385}
723 1386
724/* use this function pointer to call the above function */ 1387#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
725/* this is done to increase chances of the compiler not inlining the call */ 1388#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
726void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
727 1389
1390/** high level stuff ********************************************************/
1391
728static void 1392static int
729coro_state_destroy (struct coro *coro) 1393coro_state_destroy (pTHX_ struct coro *coro)
730{ 1394{
731 if (coro->refcnt--) 1395 if (coro->flags & CF_DESTROYED)
732 return; 1396 return 0;
1397
1398 coro->flags |= CF_DESTROYED;
1399
1400 if (coro->flags & CF_READY)
1401 {
1402 /* reduce nready, as destroying a ready coro effectively unreadies it */
1403 /* alternative: look through all ready queues and remove the coro */
1404 LOCK;
1405 --coro_nready;
1406 UNLOCK;
1407 }
1408 else
1409 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
733 1410
734 if (coro->mainstack && coro->mainstack != main_mainstack) 1411 if (coro->mainstack && coro->mainstack != main_mainstack)
735 { 1412 {
736 struct coro temp; 1413 struct coro temp;
737 1414
738 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1415 if (coro->flags & CF_RUNNING)
1416 croak ("FATAL: tried to destroy currently running coroutine");
1417
1418 save_perl (aTHX_ &temp);
739 LOAD (aTHX_ coro); 1419 load_perl (aTHX_ coro);
740 1420
741 destroy_stacks (aTHX); 1421 coro_destruct (aTHX_ coro);
742 1422
743 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1423 load_perl (aTHX_ &temp);
744 1424
745 coro->mainstack = 0; 1425 coro->slot = 0;
746 } 1426 }
747 1427
748 stack_free (coro->stack); 1428 cctx_destroy (coro->cctx);
749 SvREFCNT_dec (coro->args); 1429 SvREFCNT_dec (coro->args);
750 Safefree (coro); 1430
1431 if (coro->next) coro->next->prev = coro->prev;
1432 if (coro->prev) coro->prev->next = coro->next;
1433 if (coro == coro_first) coro_first = coro->next;
1434
1435 return 1;
751} 1436}
752 1437
753static int 1438static int
754coro_state_clear (SV *sv, MAGIC *mg) 1439coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755{ 1440{
756 struct coro *coro = (struct coro *)mg->mg_ptr; 1441 struct coro *coro = (struct coro *)mg->mg_ptr;
757 mg->mg_ptr = 0; 1442 mg->mg_ptr = 0;
758 1443
1444 coro->hv = 0;
1445
1446 if (--coro->refcnt < 0)
1447 {
759 coro_state_destroy (coro); 1448 coro_state_destroy (aTHX_ coro);
1449 Safefree (coro);
1450 }
760 1451
761 return 0; 1452 return 0;
762} 1453}
763 1454
764static int 1455static int
765coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1456coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766{ 1457{
767 struct coro *coro = (struct coro *)mg->mg_ptr; 1458 struct coro *coro = (struct coro *)mg->mg_ptr;
768 1459
769 ++coro->refcnt; 1460 ++coro->refcnt;
770 1461
771 return 0; 1462 return 0;
772} 1463}
773 1464
774static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1465static MGVTBL coro_state_vtbl = {
775 1466 0, 0, 0, 0,
776static struct coro * 1467 coro_state_free,
777SvSTATE (SV *coro) 1468 0,
778{ 1469#ifdef MGf_DUP
779 HV *stash; 1470 coro_state_dup,
780 MAGIC *mg; 1471#else
781 1472# define MGf_DUP 0
782 if (SvROK (coro)) 1473#endif
783 coro = SvRV (coro); 1474};
784
785 stash = SvSTASH (coro);
786 if (stash != coro_stash && stash != coro_state_stash)
787 {
788 /* very slow, but rare, check */
789 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
790 croak ("Coro::State object required");
791 }
792
793 mg = SvMAGIC (coro);
794 assert (mg->mg_type == PERL_MAGIC_ext);
795 return (struct coro *)mg->mg_ptr;
796}
797 1475
798static void 1476static void
1477prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1478{
1479 ta->prev = SvSTATE (prev_sv);
1480 ta->next = SvSTATE (next_sv);
1481 TRANSFER_CHECK (*ta);
1482}
1483
1484static void
799api_transfer (pTHX_ SV *prev, SV *next, int flags) 1485api_transfer (SV *prev_sv, SV *next_sv)
800{ 1486{
801 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1487 dTHX;
1488 struct transfer_args ta;
1489
1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491 TRANSFER (ta, 1);
802} 1492}
803 1493
804/** Coro ********************************************************************/ 1494/** Coro ********************************************************************/
805 1495
806#define PRIO_MAX 3
807#define PRIO_HIGH 1
808#define PRIO_NORMAL 0
809#define PRIO_LOW -1
810#define PRIO_IDLE -3
811#define PRIO_MIN -4
812
813/* for Coro.pm */
814static GV *coro_current, *coro_idle;
815static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816static int coro_nready;
817
818static void 1496static void
819coro_enq (pTHX_ SV *sv) 1497coro_enq (pTHX_ SV *coro_sv)
1498{
1499 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1500}
1501
1502static SV *
1503coro_deq (pTHX)
820{ 1504{
821 int prio; 1505 int prio;
822 1506
823 if (SvTYPE (sv) != SVt_PVHV)
824 croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826 prio = SvSTATE (sv)->prio;
827
828 av_push (coro_ready [prio - PRIO_MIN], sv);
829 coro_nready++;
830}
831
832static SV *
833coro_deq (pTHX_ int min_prio)
834{
835 int prio = PRIO_MAX - PRIO_MIN;
836
837 min_prio -= PRIO_MIN;
838 if (min_prio < 0)
839 min_prio = 0;
840
841 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
842 if (AvFILLp (coro_ready [prio]) >= 0) 1508 if (AvFILLp (coro_ready [prio]) >= 0)
843 {
844 coro_nready--;
845 return av_shift (coro_ready [prio]); 1509 return av_shift (coro_ready [prio]);
846 }
847 1510
848 return 0; 1511 return 0;
849} 1512}
850 1513
851static void 1514static int
852api_ready (SV *coro) 1515api_ready (SV *coro_sv)
853{ 1516{
854 dTHX; 1517 dTHX;
1518 struct coro *coro;
1519 SV *sv_hook;
1520 void (*xs_hook)(void);
855 1521
856 if (SvROK (coro)) 1522 if (SvROK (coro_sv))
857 coro = SvRV (coro); 1523 coro_sv = SvRV (coro_sv);
1524
1525 coro = SvSTATE (coro_sv);
1526
1527 if (coro->flags & CF_READY)
1528 return 0;
1529
1530 coro->flags |= CF_READY;
858 1531
859 LOCK; 1532 LOCK;
1533
1534 sv_hook = coro_nready ? 0 : coro_readyhook;
1535 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1536
860 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1537 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1538 ++coro_nready;
1539
861 UNLOCK; 1540 UNLOCK;
1541
1542 if (sv_hook)
1543 {
1544 dSP;
1545
1546 ENTER;
1547 SAVETMPS;
1548
1549 PUSHMARK (SP);
1550 PUTBACK;
1551 call_sv (sv_hook, G_DISCARD);
1552 SPAGAIN;
1553
1554 FREETMPS;
1555 LEAVE;
1556 }
1557
1558 if (xs_hook)
1559 xs_hook ();
1560
1561 return 1;
1562}
1563
1564static int
1565api_is_ready (SV *coro_sv)
1566{
1567 dTHX;
1568
1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1570}
1571
1572INLINE void
1573prepare_schedule (pTHX_ struct transfer_args *ta)
1574{
1575 SV *prev_sv, *next_sv;
1576
1577 for (;;)
1578 {
1579 LOCK;
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586 UNLOCK;
1587
1588 ENTER;
1589 SAVETMPS;
1590
1591 PUSHMARK (SP);
1592 PUTBACK;
1593 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1594 SPAGAIN;
1595
1596 FREETMPS;
1597 LEAVE;
1598 continue;
1599 }
1600
1601 ta->next = SvSTATE (next_sv);
1602
1603 /* cannot transfer to destroyed coros, skip and look for next */
1604 if (expect_false (ta->next->flags & CF_DESTROYED))
1605 {
1606 UNLOCK;
1607 SvREFCNT_dec (next_sv);
1608 /* coro_nready has already been taken care of by destroy */
1609 continue;
1610 }
1611
1612 --coro_nready;
1613 UNLOCK;
1614 break;
1615 }
1616
1617 /* free this only after the transfer */
1618 prev_sv = SvRV (coro_current);
1619 ta->prev = SvSTATE (prev_sv);
1620 TRANSFER_CHECK (*ta);
1621 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1622 ta->next->flags &= ~CF_READY;
1623 SvRV_set (coro_current, next_sv);
1624
1625 LOCK;
1626 free_coro_mortal (aTHX);
1627 coro_mortal = prev_sv;
1628 UNLOCK;
1629}
1630
1631INLINE void
1632prepare_cede (pTHX_ struct transfer_args *ta)
1633{
1634 api_ready (coro_current);
1635 prepare_schedule (aTHX_ ta);
1636}
1637
1638static int
1639prepare_cede_notself (pTHX_ struct transfer_args *ta)
1640{
1641 if (coro_nready)
1642 {
1643 SV *prev = SvRV (coro_current);
1644 prepare_schedule (aTHX_ ta);
1645 api_ready (prev);
1646 return 1;
1647 }
1648 else
1649 return 0;
862} 1650}
863 1651
864static void 1652static void
865api_schedule (void) 1653api_schedule (void)
866{ 1654{
867 dTHX; 1655 dTHX;
1656 struct transfer_args ta;
868 1657
869 SV *prev, *next; 1658 prepare_schedule (aTHX_ &ta);
870 SV *current = GvSV (coro_current); 1659 TRANSFER (ta, 1);
1660}
871 1661
872 for (;;) 1662static int
1663api_cede (void)
1664{
1665 dTHX;
1666 struct transfer_args ta;
1667
1668 prepare_cede (aTHX_ &ta);
1669
1670 if (expect_true (ta.prev != ta.next))
1671 {
1672 TRANSFER (ta, 1);
1673 return 1;
873 { 1674 }
874 LOCK; 1675 else
1676 return 0;
1677}
875 1678
876 next = coro_deq (aTHX_ PRIO_MIN); 1679static int
1680api_cede_notself (void)
1681{
1682 dTHX;
1683 struct transfer_args ta;
877 1684
878 if (next) 1685 if (prepare_cede_notself (aTHX_ &ta))
1686 {
1687 TRANSFER (ta, 1);
1688 return 1;
1689 }
1690 else
1691 return 0;
1692}
1693
1694static void
1695api_trace (SV *coro_sv, int flags)
1696{
1697 dTHX;
1698 struct coro *coro = SvSTATE (coro_sv);
1699
1700 if (flags & CC_TRACE)
1701 {
1702 if (!coro->cctx)
1703 coro->cctx = cctx_new_run ();
1704 else if (!(coro->cctx->flags & CC_TRACE))
1705 croak ("cannot enable tracing on coroutine with custom stack");
1706
1707 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1708 }
1709 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1710 {
1711 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1712
1713 if (coro->flags & CF_RUNNING)
1714 PL_runops = RUNOPS_DEFAULT;
1715 else
1716 coro->slot->runops = RUNOPS_DEFAULT;
1717 }
1718}
1719
1720#if 0
1721static int
1722coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1723{
1724 AV *padlist;
1725 AV *av = (AV *)mg->mg_obj;
1726
1727 abort ();
1728
1729 return 0;
1730}
1731
1732static MGVTBL coro_gensub_vtbl = {
1733 0, 0, 0, 0,
1734 coro_gensub_free
1735};
1736#endif
1737
1738/*****************************************************************************/
1739/* PerlIO::cede */
1740
1741typedef struct
1742{
1743 PerlIOBuf base;
1744 NV next, every;
1745} PerlIOCede;
1746
1747static IV
1748PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1749{
1750 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1751
1752 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1753 self->next = nvtime () + self->every;
1754
1755 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1756}
1757
1758static SV *
1759PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1760{
1761 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1762
1763 return newSVnv (self->every);
1764}
1765
1766static IV
1767PerlIOCede_flush (pTHX_ PerlIO *f)
1768{
1769 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1770 double now = nvtime ();
1771
1772 if (now >= self->next)
1773 {
1774 api_cede ();
1775 self->next = now + self->every;
1776 }
1777
1778 return PerlIOBuf_flush (aTHX_ f);
1779}
1780
1781static PerlIO_funcs PerlIO_cede =
1782{
1783 sizeof(PerlIO_funcs),
1784 "cede",
1785 sizeof(PerlIOCede),
1786 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1787 PerlIOCede_pushed,
1788 PerlIOBuf_popped,
1789 PerlIOBuf_open,
1790 PerlIOBase_binmode,
1791 PerlIOCede_getarg,
1792 PerlIOBase_fileno,
1793 PerlIOBuf_dup,
1794 PerlIOBuf_read,
1795 PerlIOBuf_unread,
1796 PerlIOBuf_write,
1797 PerlIOBuf_seek,
1798 PerlIOBuf_tell,
1799 PerlIOBuf_close,
1800 PerlIOCede_flush,
1801 PerlIOBuf_fill,
1802 PerlIOBase_eof,
1803 PerlIOBase_error,
1804 PerlIOBase_clearerr,
1805 PerlIOBase_setlinebuf,
1806 PerlIOBuf_get_base,
1807 PerlIOBuf_bufsiz,
1808 PerlIOBuf_get_ptr,
1809 PerlIOBuf_get_cnt,
1810 PerlIOBuf_set_ptrcnt,
1811};
1812
1813/*****************************************************************************/
1814
1815static const CV *ssl_cv; /* for quick consistency check */
1816
1817static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1818static SV *ssl_arg0;
1819static SV *ssl_arg1;
1820
1821/* this restores the stack in the case we patched the entersub, to */
1822/* recreate the stack frame as perl will on following calls */
1823/* since entersub cleared the stack */
1824static OP *
1825pp_restore (pTHX)
1826{
1827 dSP;
1828
1829 PUSHMARK (SP);
1830
1831 EXTEND (SP, 3);
1832 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1833 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1834 PUSHs ((SV *)CvGV (ssl_cv));
1835
1836 RETURNOP (ssl_restore.op_first);
1837}
1838
1839/* declare prototype */
1840XS(XS_Coro__State__set_stacklevel);
1841
1842static OP *
1843pp_set_stacklevel (pTHX)
1844{
1845 dSP;
1846 struct transfer_args ta;
1847 SV **arg = PL_stack_base + TOPMARK + 1;
1848 int items = SP - arg; /* args without function object */
1849
1850 /* do a quick consistency check on the "function" object, and if it isn't */
1851 /* for us, divert to the real entersub */
1852 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1853 return PL_ppaddr[OP_ENTERSUB](aTHX);
1854
1855 /* pop args */
1856 SP = PL_stack_base + POPMARK;
1857
1858 if (!(PL_op->op_flags & OPf_STACKED))
1859 {
1860 /* ampersand-form of call, use @_ instead of stack */
1861 AV *av = GvAV (PL_defgv);
1862 arg = AvARRAY (av);
1863 items = AvFILLp (av) + 1;
1864 }
1865
1866 PUTBACK;
1867 switch (PL_op->op_private & 7)
1868 {
1869 case 0:
1870 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
879 break; 1871 break;
880 1872
881 UNLOCK; 1873 case 1:
1874 if (items != 2)
1875 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
882 1876
883 { 1877 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
884 dSP; 1878 break;
885 1879
886 ENTER; 1880 case 2:
887 SAVETMPS; 1881 prepare_schedule (aTHX_ &ta);
1882 break;
888 1883
889 PUSHMARK (SP); 1884 case 3:
890 PUTBACK; 1885 prepare_cede (aTHX_ &ta);
891 call_sv (GvSV (coro_idle), G_DISCARD); 1886 break;
892 1887
893 FREETMPS; 1888 case 4:
894 LEAVE; 1889 if (!prepare_cede_notself (aTHX_ &ta))
1890 RETURN;
1891
1892 break;
895 } 1893 }
896 }
897 1894
898 prev = SvRV (current); 1895 TRANSFER (ta, 0);
899 SvRV (current) = next; 1896 SPAGAIN;
900 1897
901 /* free this only after the transfer */ 1898skip:
902 coro_mortal = prev;
903 1899
904 UNLOCK; 1900 RETURN;
905
906 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
907} 1901}
908 1902
909static int coro_cede_self;
910
911static void
912api_cede (void)
913{
914 dTHX;
915 SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
916
917 LOCK;
918
919 if (coro_cede_self)
920 {
921 AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
922 av_unshift (runqueue, 1);
923 av_store (runqueue, 0, current);
924 coro_nready++;
925 coro_cede_self = 0;
926 }
927 else
928 coro_enq (aTHX_ current);
929
930 UNLOCK;
931
932 api_schedule ();
933}
934
935MODULE = Coro::State PACKAGE = Coro::State 1903MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936 1904
937PROTOTYPES: DISABLE 1905PROTOTYPES: DISABLE
938 1906
1907# these not obviously related functions are all rolled into the same xs
1908# function to increase chances that they all will call transfer with the same
1909# stack offset
1910void
1911_set_stacklevel (...)
1912 ALIAS:
1913 Coro::State::transfer = 1
1914 Coro::schedule = 2
1915 Coro::cede = 3
1916 Coro::cede_notself = 4
1917 CODE:
1918{
1919 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1920
1921 /* we patch the op, and then re-run the whole call */
1922 /* we have to put some dummy argument on the stack for this to work */
1923 /* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1924 ssl_restore.op_next = (OP *)&ssl_restore;
1925 ssl_restore.op_type = OP_NULL;
1926 ssl_restore.op_ppaddr = pp_restore;
1927 ssl_restore.op_first = PL_op;
1928
1929 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1930 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1931
1932 PL_op->op_ppaddr = pp_set_stacklevel;
1933 PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1934
1935 PL_op = (OP *)&ssl_restore;
1936}
1937
939BOOT: 1938BOOT:
940{ 1939{
941#ifdef USE_ITHREADS 1940#ifdef USE_ITHREADS
942 MUTEX_INIT (&coro_mutex); 1941 MUTEX_INIT (&coro_lock);
1942# if CORO_PTHREAD
1943 coro_thx = PERL_GET_CONTEXT;
1944# endif
943#endif 1945#endif
944 BOOT_PAGESIZE; 1946 BOOT_PAGESIZE;
945 1947
1948 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1949
1950 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1951 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1952
1953 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1954 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1955 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1956
1957 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1958 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1959 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1960
946 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1961 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947 1962
948 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1963 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
949 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1964 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
950 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1965 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1966 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
951 1967
952 main_mainstack = PL_mainstack; 1968 main_mainstack = PL_mainstack;
1969 main_top_env = PL_top_env;
953 1970
1971 while (main_top_env->je_prev)
1972 main_top_env = main_top_env->je_prev;
1973
954 coroapi.ver = CORO_API_VERSION; 1974 coroapi.ver = CORO_API_VERSION;
1975 coroapi.rev = CORO_API_REVISION;
955 coroapi.transfer = api_transfer; 1976 coroapi.transfer = api_transfer;
956 1977
957 Newz (0, main_stack, 1, coro_stack); 1978 {
958 main_stack->idle_sp = (void *)-1; 1979 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1980
1981 if (!svp) croak ("Time::HiRes is required");
1982 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1983
1984 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1985 }
959 1986
960 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1987 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961} 1988}
962 1989
963SV * 1990SV *
964new (char *klass, ...) 1991new (char *klass, ...)
965 CODE: 1992 CODE:
966{ 1993{
967 struct coro *coro; 1994 struct coro *coro;
1995 MAGIC *mg;
968 HV *hv; 1996 HV *hv;
969 int i; 1997 int i;
970 1998
971 Newz (0, coro, 1, struct coro); 1999 Newz (0, coro, 1, struct coro);
972 coro->args = newAV (); 2000 coro->args = newAV ();
2001 coro->flags = CF_NEW;
973 2002
2003 if (coro_first) coro_first->prev = coro;
2004 coro->next = coro_first;
2005 coro_first = coro;
2006
974 hv = newHV (); 2007 coro->hv = hv = newHV ();
975 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2008 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2009 mg->mg_flags |= MGf_DUP;
976 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2010 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977 2011
978 av_push (coro->args, newSVsv (RETVAL)); 2012 av_extend (coro->args, items - 1);
979 for (i = 1; i < items; i++) 2013 for (i = 1; i < items; i++)
980 av_push (coro->args, newSVsv (ST (i))); 2014 av_push (coro->args, newSVsv (ST (i)));
981
982 coro->stack = main_stack;
983 /*coro->mainstack = 0; *//*actual work is done inside transfer */
984 /*coro->stack = 0;*/
985} 2015}
986 OUTPUT: 2016 OUTPUT:
987 RETVAL 2017 RETVAL
988 2018
2019bool
2020_destroy (SV *coro_sv)
2021 CODE:
2022 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2023 OUTPUT:
2024 RETVAL
2025
989void 2026void
990transfer (prev, next, flags)
991 SV *prev
992 SV *next
993 int flags
994 CODE:
995 PUTBACK;
996 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997 SPAGAIN;
998
999int
1000prio (Coro::State coro, int newprio = 0)
1001 ALIAS:
1002 nice = 1
1003 CODE:
1004{
1005 RETVAL = coro->prio;
1006
1007 if (items > 1)
1008 {
1009 if (ix)
1010 newprio += coro->prio;
1011
1012 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1013 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1014
1015 coro->prio = newprio;
1016 }
1017}
1018
1019void
1020_clear_idle_sp (Coro::State self)
1021 CODE:
1022 self->stack->idle_sp = 0;
1023
1024void
1025_clone_state_from (SV *dst, SV *src)
1026 CODE:
1027{
1028 struct coro *coro_src = SvSTATE (src);
1029
1030 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031
1032 ++coro_src->refcnt;
1033 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1034}
1035
1036void
1037_exit (code) 2027_exit (int code)
1038 int code
1039 PROTOTYPE: $ 2028 PROTOTYPE: $
1040 CODE: 2029 CODE:
1041 _exit (code); 2030 _exit (code);
1042 2031
1043MODULE = Coro::State PACKAGE = Coro::Cont 2032int
2033cctx_stacksize (int new_stacksize = 0)
2034 CODE:
2035 RETVAL = cctx_stacksize;
2036 if (new_stacksize)
2037 {
2038 cctx_stacksize = new_stacksize;
2039 ++cctx_gen;
2040 }
2041 OUTPUT:
2042 RETVAL
2043
2044int
2045cctx_max_idle (int max_idle = 0)
2046 CODE:
2047 RETVAL = cctx_max_idle;
2048 if (max_idle > 1)
2049 cctx_max_idle = max_idle;
2050 OUTPUT:
2051 RETVAL
2052
2053int
2054cctx_count ()
2055 CODE:
2056 RETVAL = cctx_count;
2057 OUTPUT:
2058 RETVAL
2059
2060int
2061cctx_idle ()
2062 CODE:
2063 RETVAL = cctx_idle;
2064 OUTPUT:
2065 RETVAL
1044 2066
1045void 2067void
1046yield (...) 2068list ()
2069 PPCODE:
2070{
2071 struct coro *coro;
2072 for (coro = coro_first; coro; coro = coro->next)
2073 if (coro->hv)
2074 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2075}
2076
2077void
2078call (Coro::State coro, SV *coderef)
2079 ALIAS:
2080 eval = 1
2081 CODE:
2082{
2083 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2084 {
2085 struct coro temp;
2086
2087 if (!(coro->flags & CF_RUNNING))
2088 {
2089 PUTBACK;
2090 save_perl (aTHX_ &temp);
2091 load_perl (aTHX_ coro);
2092 }
2093
2094 {
2095 dSP;
2096 ENTER;
2097 SAVETMPS;
2098 PUTBACK;
2099 PUSHSTACK;
2100 PUSHMARK (SP);
2101
2102 if (ix)
2103 eval_sv (coderef, 0);
2104 else
2105 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2106
2107 POPSTACK;
2108 SPAGAIN;
2109 FREETMPS;
2110 LEAVE;
2111 PUTBACK;
2112 }
2113
2114 if (!(coro->flags & CF_RUNNING))
2115 {
2116 save_perl (aTHX_ coro);
2117 load_perl (aTHX_ &temp);
2118 SPAGAIN;
2119 }
2120 }
2121}
2122
2123SV *
2124is_ready (Coro::State coro)
2125 PROTOTYPE: $
2126 ALIAS:
2127 is_ready = CF_READY
2128 is_running = CF_RUNNING
2129 is_new = CF_NEW
2130 is_destroyed = CF_DESTROYED
2131 CODE:
2132 RETVAL = boolSV (coro->flags & ix);
2133 OUTPUT:
2134 RETVAL
2135
2136void
2137throw (Coro::State self, SV *throw = &PL_sv_undef)
1047 PROTOTYPE: @ 2138 PROTOTYPE: $;$
1048 CODE: 2139 CODE:
1049{ 2140 SvREFCNT_dec (self->throw);
1050 SV *yieldstack; 2141 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1051 SV *sv;
1052 AV *defav = GvAV (PL_defgv);
1053 struct coro *prev, *next;
1054 2142
1055 yieldstack = *hv_fetch ( 2143void
1056 (HV *)SvRV (GvSV (coro_current)), 2144api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1057 "yieldstack", sizeof ("yieldstack") - 1, 2145
2146SV *
2147has_cctx (Coro::State coro)
2148 PROTOTYPE: $
2149 CODE:
2150 RETVAL = boolSV (!!coro->cctx);
2151 OUTPUT:
2152 RETVAL
2153
2154int
2155is_traced (Coro::State coro)
2156 PROTOTYPE: $
2157 CODE:
2158 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2159 OUTPUT:
2160 RETVAL
2161
2162UV
2163rss (Coro::State coro)
2164 PROTOTYPE: $
2165 ALIAS:
2166 usecount = 1
2167 CODE:
2168 switch (ix)
2169 {
2170 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2171 case 1: RETVAL = coro->usecount; break;
1058 0 2172 }
2173 OUTPUT:
2174 RETVAL
2175
2176void
2177force_cctx ()
2178 CODE:
2179 struct coro *coro = SvSTATE (coro_current);
2180 coro->cctx->idle_sp = 0;
2181
2182void
2183swap_defsv (Coro::State self)
2184 PROTOTYPE: $
2185 ALIAS:
2186 swap_defav = 1
2187 CODE:
2188 if (!self->slot)
2189 croak ("cannot swap state with coroutine that has no saved state");
2190 else
1059 ); 2191 {
2192 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2193 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1060 2194
1061 /* set up @_ -- ugly */ 2195 SV *tmp = *src; *src = *dst; *dst = tmp;
1062 av_clear (defav); 2196 }
1063 av_fill (defav, items - 1);
1064 while (items--)
1065 av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067 sv = av_pop ((AV *)SvRV (yieldstack));
1068 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1069 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1070 SvREFCNT_dec (sv);
1071
1072 coro_state_transfer (aTHX_ prev, next, 0);
1073}
1074 2197
1075MODULE = Coro::State PACKAGE = Coro 2198MODULE = Coro::State PACKAGE = Coro
1076 2199
1077BOOT: 2200BOOT:
1078{ 2201{
1079 int i; 2202 int i;
1080 2203
2204 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2205 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2206 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2207
2208 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2209 SvREADONLY_on (coro_current);
2210
1081 coro_stash = gv_stashpv ("Coro", TRUE); 2211 coro_stash = gv_stashpv ("Coro", TRUE);
1082 2212
1083 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2213 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1084 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2214 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1085 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2215 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2216 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2217 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2218 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089 2219
1090 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1091 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1092
1093 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2220 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094 coro_ready[i] = newAV (); 2221 coro_ready[i] = newAV ();
1095 2222
1096 { 2223 {
1097 SV *sv = perl_get_sv("Coro::API", 1); 2224 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1098 2225
1099 coroapi.schedule = api_schedule; 2226 coroapi.schedule = api_schedule;
1100 coroapi.cede = api_cede; 2227 coroapi.cede = api_cede;
2228 coroapi.cede_notself = api_cede_notself;
1101 coroapi.ready = api_ready; 2229 coroapi.ready = api_ready;
2230 coroapi.is_ready = api_is_ready;
1102 coroapi.nready = &coro_nready; 2231 coroapi.nready = &coro_nready;
1103 coroapi.current = coro_current; 2232 coroapi.current = coro_current;
1104 2233
1105 GCoroAPI = &coroapi; 2234 GCoroAPI = &coroapi;
1106 sv_setiv (sv, (IV)&coroapi); 2235 sv_setiv (sv, (IV)&coroapi);
1107 SvREADONLY_on (sv); 2236 SvREADONLY_on (sv);
1108 } 2237 }
1109} 2238}
1110 2239
1111void 2240void
2241_set_current (SV *current)
2242 PROTOTYPE: $
2243 CODE:
2244 SvREFCNT_dec (SvRV (coro_current));
2245 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2246
2247void
2248_set_readyhook (SV *hook)
2249 PROTOTYPE: $
2250 CODE:
2251 LOCK;
2252 SvREFCNT_dec (coro_readyhook);
2253 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2254 UNLOCK;
2255
2256int
2257prio (Coro::State coro, int newprio = 0)
2258 ALIAS:
2259 nice = 1
2260 CODE:
2261{
2262 RETVAL = coro->prio;
2263
2264 if (items > 1)
2265 {
2266 if (ix)
2267 newprio = coro->prio - newprio;
2268
2269 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2270 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2271
2272 coro->prio = newprio;
2273 }
2274}
2275 OUTPUT:
2276 RETVAL
2277
2278SV *
1112ready (SV *self) 2279ready (SV *self)
1113 PROTOTYPE: $ 2280 PROTOTYPE: $
1114 CODE: 2281 CODE:
1115 api_ready (self); 2282 RETVAL = boolSV (api_ready (self));
2283 OUTPUT:
2284 RETVAL
1116 2285
1117int 2286int
1118nready (...) 2287nready (...)
1119 PROTOTYPE: 2288 PROTOTYPE:
1120 CODE: 2289 CODE:
1121 RETVAL = coro_nready; 2290 RETVAL = coro_nready;
1122 OUTPUT: 2291 OUTPUT:
1123 RETVAL 2292 RETVAL
1124 2293
2294# for async_pool speedup
1125void 2295void
1126schedule (...) 2296_pool_1 (SV *cb)
1127 PROTOTYPE:
1128 CODE: 2297 CODE:
1129 api_schedule (); 2298{
2299 struct coro *coro = SvSTATE (coro_current);
2300 HV *hv = (HV *)SvRV (coro_current);
2301 AV *defav = GvAV (PL_defgv);
2302 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2303 AV *invoke_av;
2304 int i, len;
2305
2306 if (!invoke)
2307 {
2308 SV *old = PL_diehook;
2309 PL_diehook = 0;
2310 SvREFCNT_dec (old);
2311 croak ("\3async_pool terminate\2\n");
2312 }
2313
2314 SvREFCNT_dec (coro->saved_deffh);
2315 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2316
2317 hv_store (hv, "desc", sizeof ("desc") - 1,
2318 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2319
2320 invoke_av = (AV *)SvRV (invoke);
2321 len = av_len (invoke_av);
2322
2323 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2324
2325 if (len > 0)
2326 {
2327 av_fill (defav, len - 1);
2328 for (i = 0; i < len; ++i)
2329 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2330 }
2331
2332 SvREFCNT_dec (invoke);
2333}
1130 2334
1131void 2335void
1132_set_cede_self () 2336_pool_2 (SV *cb)
1133 CODE: 2337 CODE:
1134 coro_cede_self = 1; 2338{
2339 struct coro *coro = SvSTATE (coro_current);
2340
2341 sv_setsv (cb, &PL_sv_undef);
2342
2343 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2344 coro->saved_deffh = 0;
2345
2346 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2347 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2348 {
2349 SV *old = PL_diehook;
2350 PL_diehook = 0;
2351 SvREFCNT_dec (old);
2352 croak ("\3async_pool terminate\2\n");
2353 }
2354
2355 av_clear (GvAV (PL_defgv));
2356 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2357 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2358
2359 coro->prio = 0;
2360
2361 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2362 api_trace (coro_current, 0);
2363
2364 av_push (av_async_pool, newSVsv (coro_current));
2365}
2366
2367#if 0
1135 2368
1136void 2369void
1137cede (...) 2370_generator_call (...)
1138 PROTOTYPE: 2371 PROTOTYPE: @
1139 CODE: 2372 PPCODE:
1140 api_cede (); 2373 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
1141 2374 xxxx
1142MODULE = Coro::State PACKAGE = Coro::AIO 2375 abort ();
1143 2376
1144SV * 2377SV *
1145_get_state () 2378gensub (SV *sub, ...)
1146 CODE: 2379 PROTOTYPE: &;@
2380 CODE:
1147{ 2381{
1148 struct { 2382 struct coro *coro;
1149 int errorno; 2383 MAGIC *mg;
1150 int laststype; 2384 CV *xcv;
1151 int laststatval; 2385 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1152 Stat_t statcache; 2386 int i;
1153 } data;
1154 2387
1155 data.errorno = errno; 2388 CvGV (ncv) = CvGV (cv);
1156 data.laststype = PL_laststype; 2389 CvFILE (ncv) = CvFILE (cv);
1157 data.laststatval = PL_laststatval;
1158 data.statcache = PL_statcache;
1159 2390
1160 RETVAL = newSVpvn ((char *)&data, sizeof data); 2391 Newz (0, coro, 1, struct coro);
2392 coro->args = newAV ();
2393 coro->flags = CF_NEW;
2394
2395 av_extend (coro->args, items - 1);
2396 for (i = 1; i < items; i++)
2397 av_push (coro->args, newSVsv (ST (i)));
2398
2399 CvISXSUB_on (ncv);
2400 CvXSUBANY (ncv).any_ptr = (void *)coro;
2401
2402 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2403
2404 CvXSUB (ncv) = CvXSUB (xcv);
2405 CvANON_on (ncv);
2406
2407 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2408 RETVAL = newRV_noinc ((SV *)ncv);
1161} 2409}
1162 OUTPUT: 2410 OUTPUT:
1163 RETVAL 2411 RETVAL
1164 2412
2413#endif
2414
2415
2416MODULE = Coro::State PACKAGE = Coro::AIO
2417
1165void 2418void
1166_set_state (char *data_) 2419_get_state (SV *self)
2420 PPCODE:
2421{
2422 AV *defav = GvAV (PL_defgv);
2423 AV *av = newAV ();
2424 int i;
2425 SV *data_sv = newSV (sizeof (struct io_state));
2426 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2427 SvCUR_set (data_sv, sizeof (struct io_state));
2428 SvPOK_only (data_sv);
2429
2430 data->errorno = errno;
2431 data->laststype = PL_laststype;
2432 data->laststatval = PL_laststatval;
2433 data->statcache = PL_statcache;
2434
2435 av_extend (av, AvFILLp (defav) + 1 + 1);
2436
2437 for (i = 0; i <= AvFILLp (defav); ++i)
2438 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2439
2440 av_push (av, data_sv);
2441
2442 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2443
2444 api_ready (self);
2445}
2446
2447void
2448_set_state (SV *state)
1167 PROTOTYPE: $ 2449 PROTOTYPE: $
2450 PPCODE:
2451{
2452 AV *av = (AV *)SvRV (state);
2453 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2454 int i;
2455
2456 errno = data->errorno;
2457 PL_laststype = data->laststype;
2458 PL_laststatval = data->laststatval;
2459 PL_statcache = data->statcache;
2460
2461 EXTEND (SP, AvFILLp (av));
2462 for (i = 0; i < AvFILLp (av); ++i)
2463 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2464}
2465
2466
2467MODULE = Coro::State PACKAGE = Coro::AnyEvent
2468
2469BOOT:
2470 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2471
2472SV *
2473_schedule (...)
2474 PROTOTYPE: @
1168 CODE: 2475 CODE:
1169{ 2476{
1170 struct { 2477 static int incede;
1171 int errorno;
1172 int laststype;
1173 int laststatval;
1174 Stat_t statcache;
1175 } *data = (void *)data_;
1176 2478
1177 errno = data->errorno; 2479 api_cede_notself ();
1178 PL_laststype = data->laststype; 2480
1179 PL_laststatval = data->laststatval; 2481 ++incede;
1180 PL_statcache = data->statcache; 2482 while (coro_nready >= incede && api_cede ())
2483 ;
2484
2485 sv_setsv (sv_activity, &PL_sv_undef);
2486 if (coro_nready >= incede)
2487 {
2488 PUSHMARK (SP);
2489 PUTBACK;
2490 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2491 SPAGAIN;
2492 }
2493
2494 --incede;
1181} 2495}
2496
2497
2498MODULE = Coro::State PACKAGE = PerlIO::cede
2499
2500BOOT:
2501 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2502

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