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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 1.268 by root, Fri Nov 14 06:41:41 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
33 105
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 107# undef CORO_STACKGUARD
36#endif 108#endif
37 109
38#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 111# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
51# endif 153# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61 154
62#define SUB_INIT "Coro::State::initialize"
63
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 */
186static volatile struct coro *transfer_next;
88 187
89/* this is actually not just the c stack but also c registers etc... */ 188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
218
219/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 220typedef struct coro_cctx {
91 struct coro_stack *next; 221 struct coro_cctx *next;
92 222
93 void *idle_sp; 223 /* the stack */
94 void *sptr; 224 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 225 size_t ssize;
96 226
97 /* cpu state */ 227 /* cpu state */
228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
230 JMPENV *top_env;
98 coro_context cctx; 231 coro_context cctx;
99} coro_stack;
100 232
101static coro_stack *main_stack; 233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
102 239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
103struct coro { 261struct coro {
104 /* optionally saved, might be zero */ 262 /* the c coroutine allocated to this perl coroutine, if any */
105 AV *defav; 263 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;
112 264
113 /* the c stack, if any */ 265 /* 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; 266 AV *mainstack;
120 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
121 OP *op; 268
122 SV **curpad; 269 AV *args; /* data associated with this coroutine (initial args) */
123 AV *comppad; 270 int refcnt; /* coroutines are refcounted, yes */
124 CV *compcv; 271 int flags; /* CF_ flags */
125 SV **stack_base; 272 HV *hv; /* the perl hash associated with this coro, if any */
126 SV **stack_max; 273
127 SV **tmps_stack; 274 /* statistics */
128 I32 tmps_floor; 275 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;
146 276
147 /* coro process data */ 277 /* coro process data */
148 int prio; 278 int prio;
279 SV *throw; /* exception to be thrown */
149 280
150 /* data associated with this coroutine (initial args) */ 281 /* async_pool */
151 AV *args; 282 SV *saved_deffh;
152 int refcnt; 283
284 /* linked list */
285 struct coro *next, *prev;
153}; 286};
154 287
155typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
157 290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static int coro_nready;
305static struct coro *coro_first;
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
158static AV * 339static AV *
159coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
160{ 341{
161 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
163 344
164 newpadlist = newAV (); 345 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 351#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 353 --AvFILLp (padlist);
173 354
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
176 357
177 return newpadlist; 358 return newpadlist;
178} 359}
179 360
… …
209 390
210 /* casting is fun. */ 391 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 393 free_padlist (aTHX_ padlist);
213 394
214 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 396
216 return 0; 397 return 0;
217} 398}
218 399
219#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 402
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222 443
223/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
224static void 445static void
225get_padlist (pTHX_ CV *cv) 446get_padlist (pTHX_ CV *cv)
226{ 447{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
228 450
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 453 else
232 { 454 {
233#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 458 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
239#else 462#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 466}
244 467
245static void 468static void
246put_padlist (pTHX_ CV *cv) 469put_padlist (pTHX_ CV *cv)
247{ 470{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
249 473
250 if (!mg) 474 if (expect_false (!mg))
251 { 475 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 }
257 476
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
259}
260 478
261#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
263 481
264#define LOAD(state) load_state(aTHX_ (state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 483}
266 484
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
268 486
269static void 487static void
270load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
271{ 489{
272 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 491 c->slot = 0;
274 492
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 493 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;
306 494
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
310 503
311 { 504 {
312 dSP; 505 dSP;
506
313 CV *cv; 507 CV *cv;
314 508
315 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
317 { 511 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
324 } 514 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 515 }
328 516
329 PUTBACK; 517 PUTBACK;
330 } 518 }
331} 519}
332 520
333static void 521static void
334save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
335{ 523{
336 { 524 {
337 dSP; 525 dSP;
338 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
342 /* 530 /*
343 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
345 */ 533 */
346 534
347 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
349 for (;;) 537 for (;;)
350 { 538 {
351 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
352 { 540 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
354 542
355 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 544 {
357 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
358 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
359 { 548 {
360 EXTEND (SP, CvDEPTH(cv)*2); 549 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)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
371 553
554 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 555 get_padlist (aTHX_ cv);
373 } 556 }
374 } 557 }
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 } 558 }
384 559
385 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 561 break;
387 562
388 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
391 } 566 }
392 567
393 PUTBACK; 568 PUTBACK;
394 } 569 }
395 570
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 582
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; 583 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 584
407 c->op = PL_op; 585 {
408 c->curpad = PL_curpad; 586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 587
410 c->compcv = PL_compcv; 588 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 589 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 590 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 591 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 592
415 c->tmps_ix = PL_tmps_ix; 593 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 594 # include "state.h"
417 c->markstack = PL_markstack; 595 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 596 }
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} 597}
435 598
436/* 599/*
437 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
441 */ 604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
442static void 608static void
443coro_init_stacks (pTHX) 609coro_init_stacks (pTHX)
444{ 610{
445 LOCK; 611 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; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 615
452 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 619
456 New(50,PL_tmps_stack,96,SV*); 620 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 623 PL_tmps_max = 32;
460 624
461 New(54,PL_markstack,16,I32); 625 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 627 PL_markstack_max = PL_markstack + 16;
464 628
465#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
467#endif 631#endif
468 632
469 New(54,PL_scopestack,16,I32); 633 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 635 PL_scopestack_max = 8;
472 636
473 New(54,PL_savestack,96,ANY); 637 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 639 PL_savestack_max = 24;
476 640
477#if PERL_VERSION < 9 641#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 644 PL_retstack_max = 4;
481#endif 645#endif
482
483 UNLOCK;
484} 646}
647#endif
485 648
486/* 649/*
487 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
488 */ 651 */
489static void 652static void
490destroy_stacks(pTHX) 653coro_destruct_stacks (pTHX)
491{ 654{
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) 655 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
505 657
506 while (PL_curstackinfo) 658 while (PL_curstackinfo)
507 { 659 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
509 661
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 662 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 664
522 Safefree (PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 666 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 667 PL_curstackinfo = p;
525 } 668 }
526 669
527 Safefree (PL_tmps_stack); 670 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 671 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 672 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 673 Safefree (PL_savestack);
531#if PERL_VERSION < 9 674#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 675 Safefree (PL_retstack);
533#endif 676#endif
534} 677}
535 678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_set_stacklevel calling us */
722#define SSL_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_set_stacklevel */
724#define SSL_TAIL set_stacklevel_tail (aTHX)
725
726INLINE void
727set_stacklevel_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
536static void 838static void
537setup_coro (struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
538{ 840{
539 /* 841 /*
540 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
541 */ 843 */
542 dTHX; 844 coro_init_stacks (aTHX);
845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_flags = OPf_WANT_VOID;
877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
881 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SSL_HEAD;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
930free_coro_mortal (pTHX)
931{
932 if (expect_true (coro_mortal))
933 {
934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
936 }
937}
938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_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 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
1074static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx)
1076{
543 dSP; 1077 dSP;
544 UNOP myop; 1078 UNOP myop;
545 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546 1079
547 coro_init_stacks (aTHX); 1080 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 1081
553 SPAGAIN; 1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
554 1084
555 Zero (&myop, 1, UNOP); 1085 Zero (&myop, 1, UNOP);
556 myop.op_next = Nullop; 1086 myop.op_next = PL_op;
557 myop.op_flags = OPf_WANT_VOID; 1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558 1088
1089 PUSHMARK (SP);
1090 EXTEND (SP, 2);
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1093 PUTBACK;
559 PL_op = (OP *)&myop; 1094 PL_op = (OP *)&myop;
560
561 PUSHMARK(SP);
562 XPUSHs (sub_init);
563 PUTBACK;
564 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565 SPAGAIN; 1096 SPAGAIN;
566
567 ENTER; /* necessary e.g. for dounwind */
568} 1097}
569 1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
570static void 1123static void
1124cctx_run (void *arg)
1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SSL_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
571transfer_tail () 1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150
1151 /*
1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1161}
1162
1163static coro_cctx *
1164cctx_new ()
572{ 1165{
573 if (coro_mortal) 1166 coro_cctx *cctx;
574 { 1167
575 SvREFCNT_dec (coro_mortal); 1168 ++cctx_count;
576 coro_mortal = 0; 1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
1198#if HAVE_MMAP
1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1200 /* mmap supposedly does allocate-on-write for us */
1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1202
1203 if (cctx->sptr != (void *)-1)
577 } 1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
578 1217
579 UNLOCK; 1218 if (!cctx->sptr)
1219 {
1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1221 _exit (EXIT_FAILURE);
1222 }
1223
1224 stack_start = cctx->sptr;
1225 stack_size = cctx->ssize;
1226 }
1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1233
1234 return cctx;
580} 1235}
581 1236
582static void 1237static void
583coro_run (void *arg) 1238cctx_destroy (coro_cctx *cctx)
584{ 1239{
585 /* 1240 if (!cctx)
586 * this is a _very_ stripped down perl interpreter ;) 1241 return;
587 */
588 dTHX;
589 1242
590 transfer_tail (); 1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
591 1245
592 PL_top_env = &PL_start_env; 1246 /* coro_transfer creates new, empty cctx's */
593 PL_restartop = PL_op; 1247 if (cctx->sptr)
594 /* somebody will hit me for both perl_run and PL_restart_top */ 1248 {
595 perl_run (aTHX_ PERL_GET_CONTEXT); 1249 #if CORO_USE_VALGRIND
596 1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
597 abort (); 1251 #endif
598}
599
600static coro_stack *
601stack_new ()
602{
603 coro_stack *stack;
604
605 New (0, stack, 1, coro_stack);
606 1252
607#if HAVE_MMAP 1253#if HAVE_MMAP
608 1254 if (cctx->flags & CC_MAPPED)
609 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 1255 munmap (cctx->sptr, cctx->ssize);
610 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1256 else
611 1257#endif
612 if (stack->sptr == (void *)-1) 1258 Safefree (cctx->sptr);
613 { 1259 }
614 fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n"); 1260
615 _exit (EXIT_FAILURE); 1261 Safefree (cctx);
1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
1267static coro_cctx *
1268cctx_get (pTHX)
1269{
1270 while (expect_true (cctx_first))
616 } 1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
1274 --cctx_idle;
617 1275
618 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1276 if (expect_true (!CCTX_EXPIRED (cctx)))
1277 return cctx;
619 1278
620#else 1279 cctx_destroy (cctx);
621
622 stack->ssize = STACKSIZE * (long)sizeof (long);
623 New (0, stack->sptr, STACKSIZE, long);
624
625 if (!stack->sptr)
626 { 1280 }
627 fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628 _exit (EXIT_FAILURE);
629 }
630 1281
631#endif 1282 return cctx_new_run ();
632
633 coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635 return stack;
636} 1283}
637 1284
638static void 1285static void
639stack_free (coro_stack *stack) 1286cctx_put (coro_cctx *cctx)
640{ 1287{
641 if (!stack || stack == main_stack) 1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
642 return;
643 1289
644#if HAVE_MMAP 1290 /* free another cctx if overlimit */
645 munmap (stack->sptr, stack->ssize); 1291 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 { 1292 {
667 stack = stack_new (); 1293 coro_cctx *first = cctx_first;
668 PL_op = PL_op->op_next; 1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
669 } 1298 }
670 1299
671 return stack; 1300 ++cctx_idle;
1301 cctx->next = cctx_first;
1302 cctx_first = cctx;
672} 1303}
1304
1305/** coroutine switching *****************************************************/
673 1306
674static void 1307static void
675stack_put (coro_stack *stack) 1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
676{ 1309{
677 stack->next = stack_first; 1310 if (expect_true (prev != next))
678 stack_first = stack; 1311 {
679} 1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
680 1314
681/* never call directly, always through the coro_state_transfer global variable */ 1315 if (expect_false (next->flags & CF_RUNNING))
682static void 1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
1329static void NOINLINE
683transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
684{ 1331{
685 dSTACKLEVEL; 1332 dSTACKLEVEL;
686 1333
687 /* sometimes transfer is only called to set idle_sp */ 1334 /* sometimes transfer is only called to set idle_sp */
688 if (!prev->stack->idle_sp) 1335 if (expect_false (!next))
689 prev->stack->idle_sp = stacklevel; 1336 {
690 1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
691 LOCK; 1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
692
693 if (prev != next)
694 { 1339 }
695 coro_stack *prev_stack = prev->stack; 1340 else if (expect_true (prev != next))
1341 {
1342 coro_cctx *prev__cctx;
696 1343
697 /* possibly "free" the stack */ 1344 if (expect_false (prev->flags & CF_NEW))
698 if (0 && prev_stack->idle_sp == stacklevel)
699 { 1345 {
700 stack_put (prev_stack); 1346 /* create a new empty/source context */
701 prev->stack = 0; 1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING;
702 } 1350 }
703 1351
704 if (next->mainstack) 1352 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
705 { 1361 {
706 /* coroutine already started */ 1362 /* need to start coroutine */
707 SAVE (prev, flags); 1363 next->flags &= ~CF_NEW;
708 LOAD (next); 1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
709 } 1366 }
710 else 1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
711 { 1378 {
712 /* need to start coroutine */ 1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
713 /* first get rid of the old state */ 1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
714 SAVE (prev, -1); 1381
715 /* setup coroutine call */ 1382 prev->cctx = 0;
716 setup_coro (next); 1383
717 /* need to change stack from main_stack to real one */ 1384 /* 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; 1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
719 } 1391 }
720 1392
721 if (!next->stack) 1393 ++next->usecount;
722 next->stack = stack_get ();
723 1394
724 if (prev_stack != next->stack) 1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
725 coro_transfer (&prev_stack->cctx, &next->stack->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
726 } 1406 }
727 1407
728 transfer_tail (); 1408 transfer_tail (aTHX);
1409 }
729} 1410}
730 1411
731/* use this function pointer to call the above function */ 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
732/* this is done to increase chances of the compiler not inlining the call */ 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
733void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
734 1414
1415/** high level stuff ********************************************************/
1416
735static void 1417static int
736coro_state_destroy (struct coro *coro) 1418coro_state_destroy (pTHX_ struct coro *coro)
737{ 1419{
738 if (coro->refcnt--) 1420 if (coro->flags & CF_DESTROYED)
739 return; 1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
1431 UNLOCK;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
740 1435
741 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
742 { 1437 {
743 struct coro temp; 1438 struct coro temp;
744 1439
745 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
746 LOAD (aTHX_ coro); 1444 load_perl (aTHX_ coro);
747 1445
748 destroy_stacks (aTHX); 1446 coro_destruct (aTHX_ coro);
749 1447
750 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1448 load_perl (aTHX_ &temp);
751 1449
752 coro->mainstack = 0; 1450 coro->slot = 0;
753 } 1451 }
754 1452
755 stack_free (coro->stack); 1453 cctx_destroy (coro->cctx);
756 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
757 Safefree (coro); 1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
758} 1461}
759 1462
760static int 1463static int
761coro_state_clear (SV *sv, MAGIC *mg) 1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
762{ 1465{
763 struct coro *coro = (struct coro *)mg->mg_ptr; 1466 struct coro *coro = (struct coro *)mg->mg_ptr;
764 mg->mg_ptr = 0; 1467 mg->mg_ptr = 0;
765 1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
766 coro_state_destroy (coro); 1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
767 1476
768 return 0; 1477 return 0;
769} 1478}
770 1479
771static int 1480static int
772coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1481coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
773{ 1482{
774 struct coro *coro = (struct coro *)mg->mg_ptr; 1483 struct coro *coro = (struct coro *)mg->mg_ptr;
775 1484
776 ++coro->refcnt; 1485 ++coro->refcnt;
777 1486
778 return 0; 1487 return 0;
779} 1488}
780 1489
781static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1490static MGVTBL coro_state_vtbl = {
782 1491 0, 0, 0, 0,
783static struct coro * 1492 coro_state_free,
784SvSTATE (SV *coro) 1493 0,
785{ 1494#ifdef MGf_DUP
786 HV *stash; 1495 coro_state_dup,
787 MAGIC *mg; 1496#else
788 1497# define MGf_DUP 0
789 if (SvROK (coro)) 1498#endif
790 coro = SvRV (coro); 1499};
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 1500
805static void 1501static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{
1504 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
1507}
1508
1509static void
806api_transfer (pTHX_ SV *prev, SV *next, int flags) 1510api_transfer (SV *prev_sv, SV *next_sv)
807{ 1511{
808 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1512 dTHX;
1513 struct transfer_args ta;
1514
1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516 TRANSFER (ta, 1);
809} 1517}
810 1518
811/** Coro ********************************************************************/ 1519/** Coro ********************************************************************/
812 1520
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 1521static void
826coro_enq (pTHX_ SV *sv) 1522coro_enq (pTHX_ SV *coro_sv)
1523{
1524 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1525}
1526
1527static SV *
1528coro_deq (pTHX)
827{ 1529{
828 int prio; 1530 int prio;
829 1531
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; ) 1532 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
849 if (AvFILLp (coro_ready [prio]) >= 0) 1533 if (AvFILLp (coro_ready [prio]) >= 0)
850 {
851 coro_nready--;
852 return av_shift (coro_ready [prio]); 1534 return av_shift (coro_ready [prio]);
853 }
854 1535
855 return 0; 1536 return 0;
856} 1537}
857 1538
1539static int
1540api_ready (SV *coro_sv)
1541{
1542 dTHX;
1543 struct coro *coro;
1544 SV *sv_hook;
1545 void (*xs_hook)(void);
1546
1547 if (SvROK (coro_sv))
1548 coro_sv = SvRV (coro_sv);
1549
1550 coro = SvSTATE (coro_sv);
1551
1552 if (coro->flags & CF_READY)
1553 return 0;
1554
1555 coro->flags |= CF_READY;
1556
1557 LOCK;
1558
1559 sv_hook = coro_nready ? 0 : coro_readyhook;
1560 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1561
1562 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1563 ++coro_nready;
1564
1565 UNLOCK;
1566
1567 if (sv_hook)
1568 {
1569 dSP;
1570
1571 ENTER;
1572 SAVETMPS;
1573
1574 PUSHMARK (SP);
1575 PUTBACK;
1576 call_sv (sv_hook, G_DISCARD);
1577 SPAGAIN;
1578
1579 FREETMPS;
1580 LEAVE;
1581 }
1582
1583 if (xs_hook)
1584 xs_hook ();
1585
1586 return 1;
1587}
1588
1589static int
1590api_is_ready (SV *coro_sv)
1591{
1592 dTHX;
1593
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct transfer_args *ta)
1599{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 LOCK;
1605 next_sv = coro_deq (aTHX);
1606
1607 /* nothing to schedule: call the idle handler */
1608 if (expect_false (!next_sv))
1609 {
1610 dSP;
1611 UNLOCK;
1612
1613 ENTER;
1614 SAVETMPS;
1615
1616 PUSHMARK (SP);
1617 PUTBACK;
1618 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1619 SPAGAIN;
1620
1621 FREETMPS;
1622 LEAVE;
1623 continue;
1624 }
1625
1626 ta->next = SvSTATE (next_sv);
1627
1628 /* cannot transfer to destroyed coros, skip and look for next */
1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1630 {
1631 UNLOCK;
1632 SvREFCNT_dec (next_sv);
1633 /* coro_nready has already been taken care of by destroy */
1634 continue;
1635 }
1636
1637 --coro_nready;
1638 UNLOCK;
1639 break;
1640 }
1641
1642 /* free this only after the transfer */
1643 prev_sv = SvRV (coro_current);
1644 ta->prev = SvSTATE (prev_sv);
1645 TRANSFER_CHECK (*ta);
1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1647 ta->next->flags &= ~CF_READY;
1648 SvRV_set (coro_current, next_sv);
1649
1650 LOCK;
1651 free_coro_mortal (aTHX);
1652 coro_mortal = prev_sv;
1653 UNLOCK;
1654}
1655
1656INLINE void
1657prepare_cede (pTHX_ struct transfer_args *ta)
1658{
1659 api_ready (coro_current);
1660 prepare_schedule (aTHX_ ta);
1661}
1662
858static void 1663static void
859api_ready (SV *coro) 1664prepare_cede_notself (pTHX_ struct transfer_args *ta)
860{ 1665{
861 dTHX; 1666 SV *prev = SvRV (coro_current);
862 1667
863 if (SvROK (coro)) 1668 if (coro_nready)
864 coro = SvRV (coro); 1669 {
865 1670 prepare_schedule (aTHX_ ta);
866 LOCK; 1671 api_ready (prev);
867 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1672 }
868 UNLOCK; 1673 else
1674 ta->prev = ta->next = SvSTATE (prev);
869} 1675}
870 1676
871static void 1677static void
872api_schedule (void) 1678api_schedule (void)
873{ 1679{
874 dTHX; 1680 dTHX;
1681 struct transfer_args ta;
875 1682
876 SV *prev, *next; 1683 prepare_schedule (aTHX_ &ta);
877 SV *current = GvSV (coro_current); 1684 TRANSFER (ta, 1);
1685}
878 1686
879 for (;;) 1687static int
1688api_cede (void)
1689{
1690 dTHX;
1691 struct transfer_args ta;
1692
1693 prepare_cede (aTHX_ &ta);
1694
1695 if (expect_true (ta.prev != ta.next))
1696 {
1697 TRANSFER (ta, 1);
1698 return 1;
880 { 1699 }
881 LOCK; 1700 else
1701 return 0;
1702}
882 1703
883 next = coro_deq (aTHX_ PRIO_MIN); 1704static int
1705api_cede_notself (void)
1706{
1707 if (coro_nready)
1708 {
1709 dTHX;
1710 struct transfer_args ta;
884 1711
885 if (next) 1712 prepare_cede_notself (aTHX_ &ta);
1713 TRANSFER (ta, 1);
1714 return 1;
1715 }
1716 else
1717 return 0;
1718}
1719
1720static void
1721api_trace (SV *coro_sv, int flags)
1722{
1723 dTHX;
1724 struct coro *coro = SvSTATE (coro_sv);
1725
1726 if (flags & CC_TRACE)
1727 {
1728 if (!coro->cctx)
1729 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack");
1732
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 {
1737 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1738
1739 if (coro->flags & CF_RUNNING)
1740 PL_runops = RUNOPS_DEFAULT;
1741 else
1742 coro->slot->runops = RUNOPS_DEFAULT;
1743 }
1744}
1745
1746#if 0
1747static int
1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1749{
1750 AV *padlist;
1751 AV *av = (AV *)mg->mg_obj;
1752
1753 abort ();
1754
1755 return 0;
1756}
1757
1758static MGVTBL coro_gensub_vtbl = {
1759 0, 0, 0, 0,
1760 coro_gensub_free
1761};
1762#endif
1763
1764/*****************************************************************************/
1765/* PerlIO::cede */
1766
1767typedef struct
1768{
1769 PerlIOBuf base;
1770 NV next, every;
1771} PerlIOCede;
1772
1773static IV
1774PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1775{
1776 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1777
1778 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1779 self->next = nvtime () + self->every;
1780
1781 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1782}
1783
1784static SV *
1785PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788
1789 return newSVnv (self->every);
1790}
1791
1792static IV
1793PerlIOCede_flush (pTHX_ PerlIO *f)
1794{
1795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796 double now = nvtime ();
1797
1798 if (now >= self->next)
1799 {
1800 api_cede ();
1801 self->next = now + self->every;
1802 }
1803
1804 return PerlIOBuf_flush (aTHX_ f);
1805}
1806
1807static PerlIO_funcs PerlIO_cede =
1808{
1809 sizeof(PerlIO_funcs),
1810 "cede",
1811 sizeof(PerlIOCede),
1812 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1813 PerlIOCede_pushed,
1814 PerlIOBuf_popped,
1815 PerlIOBuf_open,
1816 PerlIOBase_binmode,
1817 PerlIOCede_getarg,
1818 PerlIOBase_fileno,
1819 PerlIOBuf_dup,
1820 PerlIOBuf_read,
1821 PerlIOBuf_unread,
1822 PerlIOBuf_write,
1823 PerlIOBuf_seek,
1824 PerlIOBuf_tell,
1825 PerlIOBuf_close,
1826 PerlIOCede_flush,
1827 PerlIOBuf_fill,
1828 PerlIOBase_eof,
1829 PerlIOBase_error,
1830 PerlIOBase_clearerr,
1831 PerlIOBase_setlinebuf,
1832 PerlIOBuf_get_base,
1833 PerlIOBuf_bufsiz,
1834 PerlIOBuf_get_ptr,
1835 PerlIOBuf_get_cnt,
1836 PerlIOBuf_set_ptrcnt,
1837};
1838
1839/*****************************************************************************/
1840
1841static const CV *ssl_cv; /* for quick consistency check */
1842
1843static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *ssl_arg0;
1845static SV *ssl_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP *
1851pp_restore (pTHX)
1852{
1853 dSP;
1854
1855 PUSHMARK (SP);
1856
1857 EXTEND (SP, 3);
1858 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1859 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1860 PUSHs ((SV *)CvGV (ssl_cv));
1861
1862 RETURNOP (ssl_restore.op_first);
1863}
1864
1865#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */
1866
1867/* declare prototype */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 */
1875static OP *
1876pp_set_stacklevel (pTHX)
1877{
1878 dSP;
1879 struct transfer_args ta;
1880 SV **arg = PL_stack_base + TOPMARK + 1;
1881 int items = SP - arg; /* args without function object */
1882
1883 /* do a quick consistency check on the "function" object, and if it isn't */
1884 /* for us, divert to the real entersub */
1885 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1886 return PL_ppaddr[OP_ENTERSUB](aTHX);
1887
1888 /* pop args */
1889 SP = PL_stack_base + POPMARK;
1890
1891 if (!(PL_op->op_flags & OPf_STACKED))
1892 {
1893 /* ampersand-form of call, use @_ instead of stack */
1894 AV *av = GvAV (PL_defgv);
1895 arg = AvARRAY (av);
1896 items = AvFILLp (av) + 1;
1897 }
1898
1899 PUTBACK;
1900 switch (PL_op->op_private & OPpENTERSUB_SSL)
1901 {
1902 case 0:
1903 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
886 break; 1904 break;
887 1905
888 UNLOCK; 1906 case 1:
1907 if (items != 2)
1908 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
889 1909
890 { 1910 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
891 dSP; 1911 break;
892 1912
893 ENTER; 1913 case 2:
894 SAVETMPS; 1914 prepare_schedule (aTHX_ &ta);
1915 break;
895 1916
896 PUSHMARK (SP); 1917 case 3:
897 PUTBACK; 1918 prepare_cede (aTHX_ &ta);
898 call_sv (GvSV (coro_idle), G_DISCARD); 1919 break;
899 1920
900 FREETMPS; 1921 case 4:
901 LEAVE; 1922 prepare_cede_notself (aTHX_ &ta);
1923 break;
902 } 1924 }
903 }
904 1925
905 prev = SvRV (current); 1926 TRANSFER (ta, 0);
906 SvRV (current) = next; 1927 SPAGAIN;
907 1928
908 /* free this only after the transfer */ 1929skip:
909 coro_mortal = prev; 1930 PUTBACK;
910 1931 SSL_TAIL;
911 UNLOCK; 1932 SPAGAIN;
912 1933 RETURN;
913 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
914} 1934}
915
916static int coro_cede_self;
917 1935
918static void 1936static void
919api_cede (void) 1937coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)
920{ 1938{
921 dTHX; 1939 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
922 SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
923 1940
924 LOCK; 1941 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1942 ssl_cv = cv;
925 1943
926 if (coro_cede_self) 1944 /* we patch the op, and then re-run the whole call */
927 { 1945 /* we have to put some dummy argument on the stack for this to work */
928 AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN]; 1946 ssl_restore.op_next = (OP *)&ssl_restore;
929 av_unshift (runqueue, 1); 1947 ssl_restore.op_type = OP_NULL;
930 av_store (runqueue, 0, current); 1948 ssl_restore.op_ppaddr = pp_restore;
931 coro_nready++; 1949 ssl_restore.op_first = PL_op;
932 coro_cede_self = 0;
933 }
934 else
935 coro_enq (aTHX_ current);
936 1950
937 UNLOCK; 1951 ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1952 ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
938 1953
939 api_schedule (); 1954 PL_op->op_ppaddr = pp_set_stacklevel;
940} 1955 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
941 1956
1957 PL_op = (OP *)&ssl_restore;
1958}
1959
942MODULE = Coro::State PACKAGE = Coro::State 1960MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
943 1961
944PROTOTYPES: DISABLE 1962PROTOTYPES: DISABLE
945 1963
946BOOT: 1964BOOT:
947{ 1965{
948#ifdef USE_ITHREADS 1966#ifdef USE_ITHREADS
949 MUTEX_INIT (&coro_mutex); 1967 MUTEX_INIT (&coro_lock);
1968# if CORO_PTHREAD
1969 coro_thx = PERL_GET_CONTEXT;
1970# endif
950#endif 1971#endif
951 BOOT_PAGESIZE; 1972 BOOT_PAGESIZE;
952 1973
1974 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1975 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1976
1977 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1978 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1979 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1980
1981 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1982 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1983 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1984
953 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1985 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
954 1986
955 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1987 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
956 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1988 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
957 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1989 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1990 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
958 1991
959 main_mainstack = PL_mainstack; 1992 main_mainstack = PL_mainstack;
1993 main_top_env = PL_top_env;
960 1994
1995 while (main_top_env->je_prev)
1996 main_top_env = main_top_env->je_prev;
1997
961 coroapi.ver = CORO_API_VERSION; 1998 coroapi.ver = CORO_API_VERSION;
1999 coroapi.rev = CORO_API_REVISION;
962 coroapi.transfer = api_transfer; 2000 coroapi.transfer = api_transfer;
963 2001
964 Newz (0, main_stack, 1, coro_stack); 2002 {
965 main_stack->idle_sp = (void *)-1; 2003 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2004
2005 if (!svp) croak ("Time::HiRes is required");
2006 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2007
2008 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2009 }
966 2010
967 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2011 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
968} 2012}
969 2013
970SV * 2014SV *
971new (char *klass, ...) 2015new (char *klass, ...)
972 CODE: 2016 CODE:
973{ 2017{
974 struct coro *coro; 2018 struct coro *coro;
2019 MAGIC *mg;
975 HV *hv; 2020 HV *hv;
976 int i; 2021 int i;
977 2022
978 Newz (0, coro, 1, struct coro); 2023 Newz (0, coro, 1, struct coro);
979 coro->args = newAV (); 2024 coro->args = newAV ();
2025 coro->flags = CF_NEW;
980 2026
2027 if (coro_first) coro_first->prev = coro;
2028 coro->next = coro_first;
2029 coro_first = coro;
2030
981 hv = newHV (); 2031 coro->hv = hv = newHV ();
982 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2032 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2033 mg->mg_flags |= MGf_DUP;
983 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2034 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984 2035
985 av_push (coro->args, newSVsv (RETVAL)); 2036 av_extend (coro->args, items - 1);
986 for (i = 1; i < items; i++) 2037 for (i = 1; i < items; i++)
987 av_push (coro->args, newSVsv (ST (i))); 2038 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} 2039}
993 OUTPUT: 2040 OUTPUT:
994 RETVAL 2041 RETVAL
995 2042
996void 2043void
997transfer (prev, next, flags) 2044_set_stacklevel (...)
998 SV *prev 2045 ALIAS:
999 SV *next 2046 Coro::State::transfer = 1
1000 int flags 2047 Coro::schedule = 2
2048 Coro::cede = 3
2049 Coro::cede_notself = 4
1001 CODE: 2050 CODE:
1002 PUTBACK; 2051 coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);
1003 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1004 SPAGAIN;
1005 2052
1006int 2053bool
1007prio (Coro::State coro, int newprio = 0) 2054_destroy (SV *coro_sv)
1008 ALIAS: 2055 CODE:
1009 nice = 1 2056 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1010 CODE: 2057 OUTPUT:
1011{ 2058 RETVAL
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}
1025 2059
1026void 2060void
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) 2061_exit (int code)
1045 int code
1046 PROTOTYPE: $ 2062 PROTOTYPE: $
1047 CODE: 2063 CODE:
1048 _exit (code); 2064 _exit (code);
1049 2065
1050MODULE = Coro::State PACKAGE = Coro::Cont 2066int
2067cctx_stacksize (int new_stacksize = 0)
2068 CODE:
2069 RETVAL = cctx_stacksize;
2070 if (new_stacksize)
2071 {
2072 cctx_stacksize = new_stacksize;
2073 ++cctx_gen;
2074 }
2075 OUTPUT:
2076 RETVAL
2077
2078int
2079cctx_max_idle (int max_idle = 0)
2080 CODE:
2081 RETVAL = cctx_max_idle;
2082 if (max_idle > 1)
2083 cctx_max_idle = max_idle;
2084 OUTPUT:
2085 RETVAL
2086
2087int
2088cctx_count ()
2089 CODE:
2090 RETVAL = cctx_count;
2091 OUTPUT:
2092 RETVAL
2093
2094int
2095cctx_idle ()
2096 CODE:
2097 RETVAL = cctx_idle;
2098 OUTPUT:
2099 RETVAL
1051 2100
1052void 2101void
1053yield (...) 2102list ()
2103 PPCODE:
2104{
2105 struct coro *coro;
2106 for (coro = coro_first; coro; coro = coro->next)
2107 if (coro->hv)
2108 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2109}
2110
2111void
2112call (Coro::State coro, SV *coderef)
2113 ALIAS:
2114 eval = 1
2115 CODE:
2116{
2117 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2118 {
2119 struct coro temp;
2120
2121 if (!(coro->flags & CF_RUNNING))
2122 {
2123 PUTBACK;
2124 save_perl (aTHX_ &temp);
2125 load_perl (aTHX_ coro);
2126 }
2127
2128 {
2129 dSP;
2130 ENTER;
2131 SAVETMPS;
2132 PUTBACK;
2133 PUSHSTACK;
2134 PUSHMARK (SP);
2135
2136 if (ix)
2137 eval_sv (coderef, 0);
2138 else
2139 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2140
2141 POPSTACK;
2142 SPAGAIN;
2143 FREETMPS;
2144 LEAVE;
2145 PUTBACK;
2146 }
2147
2148 if (!(coro->flags & CF_RUNNING))
2149 {
2150 save_perl (aTHX_ coro);
2151 load_perl (aTHX_ &temp);
2152 SPAGAIN;
2153 }
2154 }
2155}
2156
2157SV *
2158is_ready (Coro::State coro)
2159 PROTOTYPE: $
2160 ALIAS:
2161 is_ready = CF_READY
2162 is_running = CF_RUNNING
2163 is_new = CF_NEW
2164 is_destroyed = CF_DESTROYED
2165 CODE:
2166 RETVAL = boolSV (coro->flags & ix);
2167 OUTPUT:
2168 RETVAL
2169
2170void
2171throw (Coro::State self, SV *throw = &PL_sv_undef)
1054 PROTOTYPE: @ 2172 PROTOTYPE: $;$
1055 CODE: 2173 CODE:
1056{ 2174 SvREFCNT_dec (self->throw);
1057 SV *yieldstack; 2175 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1058 SV *sv;
1059 AV *defav = GvAV (PL_defgv);
1060 struct coro *prev, *next;
1061 2176
1062 yieldstack = *hv_fetch ( 2177void
1063 (HV *)SvRV (GvSV (coro_current)), 2178api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1064 "yieldstack", sizeof ("yieldstack") - 1, 2179
2180SV *
2181has_cctx (Coro::State coro)
2182 PROTOTYPE: $
2183 CODE:
2184 RETVAL = boolSV (!!coro->cctx);
2185 OUTPUT:
2186 RETVAL
2187
2188int
2189is_traced (Coro::State coro)
2190 PROTOTYPE: $
2191 CODE:
2192 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2193 OUTPUT:
2194 RETVAL
2195
2196UV
2197rss (Coro::State coro)
2198 PROTOTYPE: $
2199 ALIAS:
2200 usecount = 1
2201 CODE:
2202 switch (ix)
2203 {
2204 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2205 case 1: RETVAL = coro->usecount; break;
1065 0 2206 }
2207 OUTPUT:
2208 RETVAL
2209
2210void
2211force_cctx ()
2212 CODE:
2213 struct coro *coro = SvSTATE (coro_current);
2214 coro->cctx->idle_sp = 0;
2215
2216void
2217swap_defsv (Coro::State self)
2218 PROTOTYPE: $
2219 ALIAS:
2220 swap_defav = 1
2221 CODE:
2222 if (!self->slot)
2223 croak ("cannot swap state with coroutine that has no saved state");
2224 else
1066 ); 2225 {
2226 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2227 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1067 2228
1068 /* set up @_ -- ugly */ 2229 SV *tmp = *src; *src = *dst; *dst = tmp;
1069 av_clear (defav); 2230 }
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 2231
1082MODULE = Coro::State PACKAGE = Coro 2232MODULE = Coro::State PACKAGE = Coro
1083 2233
1084BOOT: 2234BOOT:
1085{ 2235{
1086 int i; 2236 int i;
1087 2237
2238 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2239 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2240 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2241
2242 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2243 SvREADONLY_on (coro_current);
2244
1088 coro_stash = gv_stashpv ("Coro", TRUE); 2245 coro_stash = gv_stashpv ("Coro", TRUE);
1089 2246
1090 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2247 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1091 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2248 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1092 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2249 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1093 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2250 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1094 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2251 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1095 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2252 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1096 2253
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--; ) 2254 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1101 coro_ready[i] = newAV (); 2255 coro_ready[i] = newAV ();
1102 2256
1103 { 2257 {
1104 SV *sv = perl_get_sv("Coro::API", 1); 2258 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1105 2259
1106 coroapi.schedule = api_schedule; 2260 coroapi.schedule = api_schedule;
1107 coroapi.cede = api_cede; 2261 coroapi.cede = api_cede;
2262 coroapi.cede_notself = api_cede_notself;
1108 coroapi.ready = api_ready; 2263 coroapi.ready = api_ready;
2264 coroapi.is_ready = api_is_ready;
1109 coroapi.nready = &coro_nready; 2265 coroapi.nready = &coro_nready;
1110 coroapi.current = coro_current; 2266 coroapi.current = coro_current;
1111 2267
1112 GCoroAPI = &coroapi; 2268 GCoroAPI = &coroapi;
1113 sv_setiv (sv, (IV)&coroapi); 2269 sv_setiv (sv, (IV)&coroapi);
1114 SvREADONLY_on (sv); 2270 SvREADONLY_on (sv);
1115 } 2271 }
1116} 2272}
1117 2273
1118void 2274void
2275_set_current (SV *current)
2276 PROTOTYPE: $
2277 CODE:
2278 SvREFCNT_dec (SvRV (coro_current));
2279 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2280
2281void
2282_set_readyhook (SV *hook)
2283 PROTOTYPE: $
2284 CODE:
2285 LOCK;
2286 SvREFCNT_dec (coro_readyhook);
2287 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2288 UNLOCK;
2289
2290int
2291prio (Coro::State coro, int newprio = 0)
2292 ALIAS:
2293 nice = 1
2294 CODE:
2295{
2296 RETVAL = coro->prio;
2297
2298 if (items > 1)
2299 {
2300 if (ix)
2301 newprio = coro->prio - newprio;
2302
2303 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2304 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2305
2306 coro->prio = newprio;
2307 }
2308}
2309 OUTPUT:
2310 RETVAL
2311
2312SV *
1119ready (SV *self) 2313ready (SV *self)
1120 PROTOTYPE: $ 2314 PROTOTYPE: $
1121 CODE: 2315 CODE:
1122 api_ready (self); 2316 RETVAL = boolSV (api_ready (self));
2317 OUTPUT:
2318 RETVAL
1123 2319
1124int 2320int
1125nready (...) 2321nready (...)
1126 PROTOTYPE: 2322 PROTOTYPE:
1127 CODE: 2323 CODE:
1128 RETVAL = coro_nready; 2324 RETVAL = coro_nready;
1129 OUTPUT: 2325 OUTPUT:
1130 RETVAL 2326 RETVAL
1131 2327
2328# for async_pool speedup
1132void 2329void
1133schedule (...) 2330_pool_1 (SV *cb)
1134 PROTOTYPE:
1135 CODE: 2331 CODE:
1136 api_schedule (); 2332{
2333 struct coro *coro = SvSTATE (coro_current);
2334 HV *hv = (HV *)SvRV (coro_current);
2335 AV *defav = GvAV (PL_defgv);
2336 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2337 AV *invoke_av;
2338 int i, len;
2339
2340 if (!invoke)
2341 {
2342 SV *old = PL_diehook;
2343 PL_diehook = 0;
2344 SvREFCNT_dec (old);
2345 croak ("\3async_pool terminate\2\n");
2346 }
2347
2348 SvREFCNT_dec (coro->saved_deffh);
2349 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2350
2351 hv_store (hv, "desc", sizeof ("desc") - 1,
2352 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2353
2354 invoke_av = (AV *)SvRV (invoke);
2355 len = av_len (invoke_av);
2356
2357 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2358
2359 if (len > 0)
2360 {
2361 av_fill (defav, len - 1);
2362 for (i = 0; i < len; ++i)
2363 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2364 }
2365
2366 SvREFCNT_dec (invoke);
2367}
1137 2368
1138void 2369void
1139_set_cede_self () 2370_pool_2 (SV *cb)
1140 CODE: 2371 CODE:
1141 coro_cede_self = 1; 2372{
2373 struct coro *coro = SvSTATE (coro_current);
2374
2375 sv_setsv (cb, &PL_sv_undef);
2376
2377 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2378 coro->saved_deffh = 0;
2379
2380 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2381 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2382 {
2383 SV *old = PL_diehook;
2384 PL_diehook = 0;
2385 SvREFCNT_dec (old);
2386 croak ("\3async_pool terminate\2\n");
2387 }
2388
2389 av_clear (GvAV (PL_defgv));
2390 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2391 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2392
2393 coro->prio = 0;
2394
2395 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2396 api_trace (coro_current, 0);
2397
2398 av_push (av_async_pool, newSVsv (coro_current));
2399}
2400
2401#if 0
1142 2402
1143void 2403void
1144cede (...) 2404_generator_call (...)
1145 PROTOTYPE: 2405 PROTOTYPE: @
1146 CODE: 2406 PPCODE:
1147 api_cede (); 2407 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
1148 2408 xxxx
1149MODULE = Coro::State PACKAGE = Coro::AIO 2409 abort ();
1150 2410
1151SV * 2411SV *
1152_get_state () 2412gensub (SV *sub, ...)
1153 CODE: 2413 PROTOTYPE: &;@
2414 CODE:
1154{ 2415{
1155 struct { 2416 struct coro *coro;
1156 int errorno; 2417 MAGIC *mg;
1157 int laststype; 2418 CV *xcv;
1158 int laststatval; 2419 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1159 Stat_t statcache; 2420 int i;
1160 } data;
1161 2421
1162 data.errorno = errno; 2422 CvGV (ncv) = CvGV (cv);
1163 data.laststype = PL_laststype; 2423 CvFILE (ncv) = CvFILE (cv);
1164 data.laststatval = PL_laststatval;
1165 data.statcache = PL_statcache;
1166 2424
1167 RETVAL = newSVpvn ((char *)&data, sizeof data); 2425 Newz (0, coro, 1, struct coro);
2426 coro->args = newAV ();
2427 coro->flags = CF_NEW;
2428
2429 av_extend (coro->args, items - 1);
2430 for (i = 1; i < items; i++)
2431 av_push (coro->args, newSVsv (ST (i)));
2432
2433 CvISXSUB_on (ncv);
2434 CvXSUBANY (ncv).any_ptr = (void *)coro;
2435
2436 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2437
2438 CvXSUB (ncv) = CvXSUB (xcv);
2439 CvANON_on (ncv);
2440
2441 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2442 RETVAL = newRV_noinc ((SV *)ncv);
1168} 2443}
1169 OUTPUT: 2444 OUTPUT:
1170 RETVAL 2445 RETVAL
1171 2446
2447#endif
2448
2449
2450MODULE = Coro::State PACKAGE = Coro::AIO
2451
1172void 2452void
1173_set_state (char *data_) 2453_get_state (SV *self)
2454 PPCODE:
2455{
2456 AV *defav = GvAV (PL_defgv);
2457 AV *av = newAV ();
2458 int i;
2459 SV *data_sv = newSV (sizeof (struct io_state));
2460 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2461 SvCUR_set (data_sv, sizeof (struct io_state));
2462 SvPOK_only (data_sv);
2463
2464 data->errorno = errno;
2465 data->laststype = PL_laststype;
2466 data->laststatval = PL_laststatval;
2467 data->statcache = PL_statcache;
2468
2469 av_extend (av, AvFILLp (defav) + 1 + 1);
2470
2471 for (i = 0; i <= AvFILLp (defav); ++i)
2472 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2473
2474 av_push (av, data_sv);
2475
2476 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2477
2478 api_ready (self);
2479}
2480
2481void
2482_set_state (SV *state)
1174 PROTOTYPE: $ 2483 PROTOTYPE: $
2484 PPCODE:
2485{
2486 AV *av = (AV *)SvRV (state);
2487 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2488 int i;
2489
2490 errno = data->errorno;
2491 PL_laststype = data->laststype;
2492 PL_laststatval = data->laststatval;
2493 PL_statcache = data->statcache;
2494
2495 EXTEND (SP, AvFILLp (av));
2496 for (i = 0; i < AvFILLp (av); ++i)
2497 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2498}
2499
2500
2501MODULE = Coro::State PACKAGE = Coro::AnyEvent
2502
2503BOOT:
2504 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2505
2506SV *
2507_schedule (...)
2508 PROTOTYPE: @
1175 CODE: 2509 CODE:
1176{ 2510{
1177 struct { 2511 static int incede;
1178 int errorno;
1179 int laststype;
1180 int laststatval;
1181 Stat_t statcache;
1182 } *data = (void *)data_;
1183 2512
1184 errno = data->errorno; 2513 api_cede_notself ();
1185 PL_laststype = data->laststype; 2514
1186 PL_laststatval = data->laststatval; 2515 ++incede;
1187 PL_statcache = data->statcache; 2516 while (coro_nready >= incede && api_cede ())
2517 ;
2518
2519 sv_setsv (sv_activity, &PL_sv_undef);
2520 if (coro_nready >= incede)
2521 {
2522 PUSHMARK (SP);
2523 PUTBACK;
2524 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2525 SPAGAIN;
2526 }
2527
2528 --incede;
1188} 2529}
2530
2531
2532MODULE = Coro::State PACKAGE = PerlIO::cede
2533
2534BOOT:
2535 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2536

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