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Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.285 by root, Mon Nov 17 04:17:20 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 <stdio.h> 83/* 5.11 */
33#include <errno.h> 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
34 105
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 107# undef CORO_STACKGUARD
37#endif 108#endif
38 109
39#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
40# define STACKGUARD 0 111# define CORO_STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147# if CORO_PTHREAD
148static void *coro_thx;
52# endif 149# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 150#endif
61#endif
62 151
63/* The next macro should declare a variable stacklevel that contains and approximation 152/* helper storage struct for Coro::AIO */
64 * to the current C stack pointer. Its property is that it changes with each call 153struct io_state
65 * and should be unique. */ 154{
66#define dSTACKLEVEL int stacklevel 155 AV *res;
67#define STACKLEVEL ((void *)&stacklevel) 156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
68 161
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 162static double (*nvtime)(); /* so why doesn't it take void? */
70 163
71#include "CoroAPI.h" 164static U32 cctx_gen;
72 165static size_t cctx_stacksize = CORO_STACKSIZE;
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
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
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
88 197
89/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 199typedef struct coro_cctx
200{
91 struct coro_stack *next; 201 struct coro_cctx *next;
92 202
93 /* the stack */ 203 /* the stack */
94 void *sptr; 204 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 205 size_t ssize;
96 206
97 /* cpu state */ 207 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 210 JMPENV *top_env;
100 coro_context cctx; 211 coro_context cctx;
101} coro_stack; 212
213 U32 gen;
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 240
103/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
104struct coro { 242struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 244 coro_cctx *cctx;
107 245
108 /* data associated with this coroutine (initial args) */ 246 /* state data */
109 AV *args; 247 struct CoroSLF slf_frame; /* saved slf frame */
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 248 AV *mainstack;
125 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
126 OP *op; 250
127 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
128 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
129 CV *compcv; 253 int flags; /* CF_ flags */
130 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 255 void (*on_destroy)(pTHX_ struct coro *coro);
132 SV **tmps_stack; 256
133 I32 tmps_floor; 257 /* statistics */
134 I32 tmps_ix; 258 int usecount; /* number of transfers to this coro */
135 I32 tmps_max;
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 259
151 /* coro process data */ 260 /* coro process data */
152 int prio; 261 int prio;
262 SV *throw; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
153}; 269};
154 270
155typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
157 273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278static SV *coro_throw;
279
280/** Coro ********************************************************************/
281
282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
158static AV * 328static AV *
159coro_clone_padlist (pTHX_ CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
160{ 330{
161 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
163 333
164 newpadlist = newAV (); 334 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 340#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 342 --AvFILLp (padlist);
173 343
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
176 346
177 return newpadlist; 347 return newpadlist;
178} 348}
179 349
… …
209 379
210 /* casting is fun. */ 380 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
213 383
214 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 385
216 return 0; 386 return 0;
217} 387}
218 388
219#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_cv PERL_MAGIC_ext
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 391
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC(sv, type) \
398 expect_true (SvMAGIC (sv)) \
399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
400 ? SvMAGIC (sv) \
401 : mg_find (sv, type) \
402 : 0
403
404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
408SvSTATE_ (pTHX_ SV *coro)
409{
410 HV *stash;
411 MAGIC *mg;
412
413 if (SvROK (coro))
414 coro = SvRV (coro);
415
416 if (expect_false (SvTYPE (coro) != SVt_PVHV))
417 croak ("Coro::State object required");
418
419 stash = SvSTASH (coro);
420 if (expect_false (stash != coro_stash && stash != coro_state_stash))
421 {
422 /* very slow, but rare, check */
423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
424 croak ("Coro::State object required");
425 }
426
427 mg = CORO_MAGIC_state (coro);
428 return (struct coro *)mg->mg_ptr;
429}
430
431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
222 445
223/* the next two functions merely cache the padlists */ 446/* the next two functions merely cache the padlists */
224static void 447static void
225get_padlist (pTHX_ CV *cv) 448get_padlist (pTHX_ CV *cv)
226{ 449{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 450 MAGIC *mg = CORO_MAGIC_cv (cv);
451 AV *av;
228 452
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 453 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 454 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 455 else
232 { 456 {
233#if 0 457#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 458 /* this is probably cleaner? but also slower! */
459 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 460 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 461 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 462 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 463 SvREFCNT_dec (cp);
239#else 464#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 465 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 468}
244 469
245static void 470static void
246put_padlist (pTHX_ CV *cv) 471put_padlist (pTHX_ CV *cv)
247{ 472{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 473 MAGIC *mg = CORO_MAGIC_cv (cv);
474 AV *av;
249 475
250 if (!mg) 476 if (expect_false (!mg))
251 { 477 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 }
257 478
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 479 av = (AV *)mg->mg_obj;
259}
260 480
261#define SB do { 481 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 482 av_extend (av, AvMAX (av) + 1);
263 483
264#define LOAD(state) load_state(aTHX_ (state)); 484 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 485}
266 486
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 487/** load & save, init *******************************************************/
268 488
269static void 489static void
270load_state(pTHX_ Coro__State c) 490load_perl (pTHX_ Coro__State c)
271{ 491{
272 PL_dowarn = c->dowarn; 492 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 493 c->slot = 0;
274 494
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 495 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;
305 496
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 497 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 498 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 499 GvSV (PL_errgv) = slot->errsv;
500 GvSV (irsgv) = slot->irsgv;
501
502 #define VAR(name,type) PL_ ## name = slot->name;
503 # include "state.h"
504 #undef VAR
309 505
310 { 506 {
311 dSP; 507 dSP;
508
312 CV *cv; 509 CV *cv;
313 510
314 /* now do the ugly restore mess */ 511 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 512 while (expect_true (cv = (CV *)POPs))
316 { 513 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 514 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 515 CvDEPTH (cv) = PTR2IV (POPs);
323 } 516 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 517 }
327 518
328 PUTBACK; 519 PUTBACK;
329 } 520 }
330}
331 521
522 slf_frame = c->slf_frame;
523 coro_throw = c->throw;
524}
525
332static void 526static void
333save_state(pTHX_ Coro__State c, int flags) 527save_perl (pTHX_ Coro__State c)
334{ 528{
529 c->throw = coro_throw;
530 c->slf_frame = slf_frame;
531
335 { 532 {
336 dSP; 533 dSP;
337 I32 cxix = cxstack_ix; 534 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 535 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 536 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 538 /*
342 * the worst thing you can imagine happens first - we have to save 539 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 540 * (and reinitialize) all cv's in the whole callchain :(
344 */ 541 */
345 542
346 PUSHs (Nullsv); 543 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 544 /* this loop was inspired by pp_caller */
348 for (;;) 545 for (;;)
349 { 546 {
350 while (cxix >= 0) 547 while (expect_true (cxix >= 0))
351 { 548 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 549 PERL_CONTEXT *cx = &ccstk[cxix--];
353 550
354 if (CxTYPE(cx) == CXt_SUB) 551 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 552 {
356 CV *cv = cx->blk_sub.cv; 553 CV *cv = cx->blk_sub.cv;
554
357 if (CvDEPTH(cv)) 555 if (expect_true (CvDEPTH (cv)))
358 { 556 {
359 EXTEND (SP, CvDEPTH(cv)*2); 557 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 558 PUSHs ((SV *)CvPADLIST (cv));
559 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 560 PUSHs ((SV *)cv);
370 561
562 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 563 get_padlist (aTHX_ cv);
372 } 564 }
373 } 565 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 566 }
383 567
384 if (top_si->si_type == PERLSI_MAIN) 568 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 569 break;
386 570
387 top_si = top_si->si_prev; 571 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 572 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 573 cxix = top_si->si_cxix;
390 } 574 }
391 575
392 PUTBACK; 576 PUTBACK;
393 } 577 }
394 578
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 579 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 580 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 581 if (SLOT_COUNT >= 1) CXINC;
582 if (SLOT_COUNT >= 2) CXINC;
583 if (SLOT_COUNT >= 3) CXINC;
584 {
585 int i;
586 for (i = 3; i < SLOT_COUNT; ++i)
587 CXINC;
588 }
589 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 590
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 591 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 592
406 c->op = PL_op; 593 {
407 c->curpad = PL_curpad; 594 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 595
409 c->compcv = PL_compcv; 596 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 597 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 598 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 599 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 600
414 c->tmps_ix = PL_tmps_ix; 601 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 602 # include "state.h"
416 c->markstack = PL_markstack; 603 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 604 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432} 605}
433 606
434/* 607/*
435 * allocate various perl stacks. This is an exact copy 608 * allocate various perl stacks. This is almost an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 609 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 610 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 611 * not usually need a lot of stackspace.
439 */ 612 */
613#if CORO_PREFER_PERL_FUNCTIONS
614# define coro_init_stacks init_stacks
615#else
440static void 616static void
441coro_init_stacks (pTHX) 617coro_init_stacks (pTHX)
442{ 618{
443 LOCK; 619 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 620 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 621 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 622 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 623
450 PL_stack_base = AvARRAY(PL_curstack); 624 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 625 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 626 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 627
454 New(50,PL_tmps_stack,96,SV*); 628 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 629 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 630 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 631 PL_tmps_max = 32;
458 632
459 New(54,PL_markstack,16,I32); 633 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 634 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 635 PL_markstack_max = PL_markstack + 16;
462 636
463#ifdef SET_MARK_OFFSET 637#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 638 SET_MARK_OFFSET;
465#endif 639#endif
466 640
467 New(54,PL_scopestack,16,I32); 641 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 642 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 643 PL_scopestack_max = 8;
470 644
471 New(54,PL_savestack,96,ANY); 645 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 646 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 647 PL_savestack_max = 24;
474 648
475#if PERL_VERSION < 9 649#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 650 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 651 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 652 PL_retstack_max = 4;
479#endif 653#endif
480
481 UNLOCK;
482} 654}
655#endif
483 656
484/* 657/*
485 * destroy the stacks, the callchain etc... 658 * destroy the stacks, the callchain etc...
486 */ 659 */
487static void 660static void
488destroy_stacks(pTHX) 661coro_destruct_stacks (pTHX)
489{ 662{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 663 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 664 PL_curstackinfo = PL_curstackinfo->si_next;
503 665
504 while (PL_curstackinfo) 666 while (PL_curstackinfo)
505 { 667 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 668 PERL_SI *p = PL_curstackinfo->si_prev;
507 669
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 670 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 671 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 672
520 Safefree (PL_curstackinfo->si_cxstack); 673 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 674 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 675 PL_curstackinfo = p;
523 } 676 }
524 677
525 Safefree (PL_tmps_stack); 678 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 679 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 680 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 681 Safefree (PL_savestack);
529#if PERL_VERSION < 9 682#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 683 Safefree (PL_retstack);
531#endif 684#endif
532} 685}
533 686
687static size_t
688coro_rss (pTHX_ struct coro *coro)
689{
690 size_t rss = sizeof (*coro);
691
692 if (coro->mainstack)
693 {
694 perl_slots tmp_slot;
695 perl_slots *slot;
696
697 if (coro->flags & CF_RUNNING)
698 {
699 slot = &tmp_slot;
700
701 #define VAR(name,type) slot->name = PL_ ## name;
702 # include "state.h"
703 #undef VAR
704 }
705 else
706 slot = coro->slot;
707
708 if (slot)
709 {
710 rss += sizeof (slot->curstackinfo);
711 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
713 rss += slot->tmps_max * sizeof (SV *);
714 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
715 rss += slot->scopestack_max * sizeof (I32);
716 rss += slot->savestack_max * sizeof (ANY);
717
718#if !PERL_VERSION_ATLEAST (5,10,0)
719 rss += slot->retstack_max * sizeof (OP *);
720#endif
721 }
722 }
723
724 return rss;
725}
726
727/** coroutine stack handling ************************************************/
728
729static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
730static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
731static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
732
733/* apparently < 5.8.8 */
734#ifndef MgPV_nolen_const
735#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
736 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
737 (const char*)(mg)->mg_ptr)
738#endif
739
740/*
741 * This overrides the default magic get method of %SIG elements.
742 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
743 * and instead of tryign to save and restore the hash elements, we just provide
744 * readback here.
745 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
746 * not expecting this to actually change the hook. This is a potential problem
747 * when a schedule happens then, but we ignore this.
748 */
534static void 749static int
535setup_coro (struct coro *coro) 750coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
751{
752 const char *s = MgPV_nolen_const (mg);
753
754 if (*s == '_')
755 {
756 SV **svp = 0;
757
758 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
759 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
760
761 if (svp)
762 {
763 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
764 return 0;
765 }
766 }
767
768 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
769}
770
771static int
772coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
773{
774 const char *s = MgPV_nolen_const (mg);
775
776 if (*s == '_')
777 {
778 SV **svp = 0;
779
780 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
781 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
782
783 if (svp)
784 {
785 SV *old = *svp;
786 *svp = 0;
787 SvREFCNT_dec (old);
788 return 0;
789 }
790 }
791
792 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
793}
794
795static int
796coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
797{
798 const char *s = MgPV_nolen_const (mg);
799
800 if (*s == '_')
801 {
802 SV **svp = 0;
803
804 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806
807 if (svp)
808 {
809 SV *old = *svp;
810 *svp = newSVsv (sv);
811 SvREFCNT_dec (old);
812 return 0;
813 }
814 }
815
816 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
817}
818
819static void
820prepare_nop (pTHX_ struct coro_transfer_args *ta)
821{
822 /* kind of mega-hacky, but works */
823 ta->next = ta->prev = (struct coro *)ta;
824}
825
826static int
827slf_check_nop (pTHX_ struct CoroSLF *frame)
828{
829 return 0;
830}
831
832static void NOINLINE /* noinline to keep it out of the transfer fast path */
833coro_setup (pTHX_ struct coro *coro)
536{ 834{
537 /* 835 /*
538 * emulate part of the perl startup here. 836 * emulate part of the perl startup here.
539 */ 837 */
540 dTHX; 838 coro_init_stacks (aTHX);
839
840 PL_runops = RUNOPS_DEFAULT;
841 PL_curcop = &PL_compiling;
842 PL_in_eval = EVAL_NULL;
843 PL_comppad = 0;
844 PL_curpm = 0;
845 PL_curpad = 0;
846 PL_localizing = 0;
847 PL_dirty = 0;
848 PL_restartop = 0;
849#if PERL_VERSION_ATLEAST (5,10,0)
850 PL_parser = 0;
851#endif
852
853 /* recreate the die/warn hooks */
854 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
855 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
856
857 GvSV (PL_defgv) = newSV (0);
858 GvAV (PL_defgv) = coro->args; coro->args = 0;
859 GvSV (PL_errgv) = newSV (0);
860 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
861 PL_rs = newSVsv (GvSV (irsgv));
862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
863
864 {
865 dSP;
866 UNOP myop;
867
868 Zero (&myop, 1, UNOP);
869 myop.op_next = Nullop;
870 myop.op_flags = OPf_WANT_VOID;
871
872 PUSHMARK (SP);
873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
874 PUTBACK;
875 PL_op = (OP *)&myop;
876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
877 SPAGAIN;
878 }
879
880 /* this newly created coroutine might be run on an existing cctx which most
881 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
882 */
883 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
884 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
885
886 coro_throw = coro->throw;
887}
888
889static void
890coro_destruct (pTHX_ struct coro *coro)
891{
892 if (!IN_DESTRUCT)
893 {
894 /* restore all saved variables and stuff */
895 LEAVE_SCOPE (0);
896 assert (PL_tmps_floor == -1);
897
898 /* free all temporaries */
899 FREETMPS;
900 assert (PL_tmps_ix == -1);
901
902 /* unwind all extra stacks */
903 POPSTACK_TO (PL_mainstack);
904
905 /* unwind main stack */
906 dounwind (-1);
907 }
908
909 SvREFCNT_dec (GvSV (PL_defgv));
910 SvREFCNT_dec (GvAV (PL_defgv));
911 SvREFCNT_dec (GvSV (PL_errgv));
912 SvREFCNT_dec (PL_defoutgv);
913 SvREFCNT_dec (PL_rs);
914 SvREFCNT_dec (GvSV (irsgv));
915
916 SvREFCNT_dec (PL_diehook);
917 SvREFCNT_dec (PL_warnhook);
918
919 SvREFCNT_dec (coro->saved_deffh);
920 SvREFCNT_dec (coro_throw);
921
922 coro_destruct_stacks (aTHX);
923}
924
925INLINE void
926free_coro_mortal (pTHX)
927{
928 if (expect_true (coro_mortal))
929 {
930 SvREFCNT_dec (coro_mortal);
931 coro_mortal = 0;
932 }
933}
934
935static int
936runops_trace (pTHX)
937{
938 COP *oldcop = 0;
939 int oldcxix = -2;
940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
941 coro_cctx *cctx = coro->cctx;
942
943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
944 {
945 PERL_ASYNC_CHECK ();
946
947 if (cctx->flags & CC_TRACE_ALL)
948 {
949 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
950 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952 SV **bot, **top;
953 AV *av = newAV (); /* return values */
954 SV **cb;
955 dSP;
956
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 bot = PL_stack_base + cx->blk_oldsp + 1;
963 top = cx->blk_gimme == G_ARRAY ? SP + 1
964 : cx->blk_gimme == G_SCALAR ? bot + 1
965 : bot;
966
967 av_extend (av, top - bot);
968 while (bot < top)
969 av_push (av, SvREFCNT_inc_NN (*bot++));
970
971 PL_runops = RUNOPS_DEFAULT;
972 ENTER;
973 SAVETMPS;
974 EXTEND (SP, 3);
975 PUSHMARK (SP);
976 PUSHs (&PL_sv_no);
977 PUSHs (fullname);
978 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
979 PUTBACK;
980 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
981 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
982 SPAGAIN;
983 FREETMPS;
984 LEAVE;
985 PL_runops = runops_trace;
986 }
987
988 if (oldcop != PL_curcop)
989 {
990 oldcop = PL_curcop;
991
992 if (PL_curcop != &PL_compiling)
993 {
994 SV **cb;
995
996 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
997 {
998 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
999
1000 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1001 {
1002 runops_proc_t old_runops = PL_runops;
1003 dSP;
1004 GV *gv = CvGV (cx->blk_sub.cv);
1005 SV *fullname = sv_2mortal (newSV (0));
1006
1007 if (isGV (gv))
1008 gv_efullname3 (fullname, gv, 0);
1009
1010 PL_runops = RUNOPS_DEFAULT;
1011 ENTER;
1012 SAVETMPS;
1013 EXTEND (SP, 3);
1014 PUSHMARK (SP);
1015 PUSHs (&PL_sv_yes);
1016 PUSHs (fullname);
1017 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1018 PUTBACK;
1019 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1020 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1021 SPAGAIN;
1022 FREETMPS;
1023 LEAVE;
1024 PL_runops = runops_trace;
1025 }
1026
1027 oldcxix = cxstack_ix;
1028 }
1029
1030 if (cctx->flags & CC_TRACE_LINE)
1031 {
1032 dSP;
1033
1034 PL_runops = RUNOPS_DEFAULT;
1035 ENTER;
1036 SAVETMPS;
1037 EXTEND (SP, 3);
1038 PL_runops = RUNOPS_DEFAULT;
1039 PUSHMARK (SP);
1040 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1041 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1042 PUTBACK;
1043 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1044 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1045 SPAGAIN;
1046 FREETMPS;
1047 LEAVE;
1048 PL_runops = runops_trace;
1049 }
1050 }
1051 }
1052 }
1053 }
1054
1055 TAINT_NOT;
1056 return 0;
1057}
1058
1059static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1061{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0;
1064}
1065
1066/* inject a fake call to Coro::State::_cctx_init into the execution */
1067/* _cctx_init should be careful, as it could be called at almost any time */
1068/* during execution of a perl program */
1069/* also initialises PL_top_env */
1070static void NOINLINE
1071cctx_prepare (pTHX_ coro_cctx *cctx)
1072{
541 dSP; 1073 dSP;
542 UNOP myop; 1074 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544 1075
545 coro_init_stacks (aTHX); 1076 PL_top_env = &PL_start_env;
546 /*PL_curcop = 0;*/
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */
548 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0;
550 1077
551 SPAGAIN; 1078 if (cctx->flags & CC_TRACE)
1079 PL_runops = runops_trace;
552 1080
553 Zero (&myop, 1, UNOP); 1081 Zero (&myop, 1, UNOP);
554 myop.op_next = Nullop; 1082 myop.op_next = PL_op;
555 myop.op_flags = OPf_WANT_VOID; 1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556 1084
1085 PUSHMARK (SP);
1086 EXTEND (SP, 2);
1087 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1089 PUTBACK;
557 PL_op = (OP *)&myop; 1090 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN; 1092 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 1093}
567 1094
568static void 1095/* the tail of transfer: execute stuff we can only do after a transfer */
1096INLINE void
1097transfer_tail (pTHX)
1098{
569free_coro_mortal () 1099 free_coro_mortal (aTHX);
570{
571 if (coro_mortal)
572 {
573 SvREFCNT_dec (coro_mortal);
574 coro_mortal = 0;
575 }
576} 1100}
577 1101
578static void 1102/*
579coro_run (void *arg)
580{
581 /*
582 * this is a _very_ stripped down perl interpreter ;) 1103 * this is a _very_ stripped down perl interpreter ;)
583 */ 1104 */
1105static void
1106cctx_run (void *arg)
1107{
1108#ifdef USE_ITHREADS
1109# if CORO_PTHREAD
1110 PERL_SET_CONTEXT (coro_thx);
1111# endif
1112#endif
1113 {
584 dTHX; 1114 dTHX;
585 int ret;
586 1115
587 UNLOCK; 1116 /* normally we would need to skip the entersub here */
1117 /* not doing so will re-execute it, which is exactly what we want */
1118 /* PL_nop = PL_nop->op_next */
588 1119
589 PL_top_env = &PL_start_env; 1120 /* inject a fake subroutine call to cctx_init */
1121 cctx_prepare (aTHX_ (coro_cctx *)arg);
590 1122
591 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1123 /* cctx_run is the alternative tail of transfer() */
592 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1124 transfer_tail (aTHX);
593 1125
594 /* continue at cctx_init, without entersub */
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597 /* somebody will hit me for both perl_run and PL_restartop */ 1126 /* somebody or something will hit me for both perl_run and PL_restartop */
598 ret = perl_run (aTHX_ PERL_GET_CONTEXT); 1127 PL_restartop = PL_op;
599 printf ("ret %d\n", ret);//D 1128 perl_run (PL_curinterp);
600 1129
601 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1130 /*
602 abort (); 1131 * If perl-run returns we assume exit() was being called or the coro
1132 * fell off the end, which seems to be the only valid (non-bug)
1133 * reason for perl_run to return. We try to exit by jumping to the
1134 * bootstrap-time "top" top_env, as we cannot restore the "main"
1135 * coroutine as Coro has no such concept
1136 */
1137 PL_top_env = main_top_env;
1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 }
603} 1140}
604 1141
605static coro_stack * 1142static coro_cctx *
606stack_new () 1143cctx_new ()
607{ 1144{
608 coro_stack *stack; 1145 coro_cctx *cctx;
609 1146
1147 ++cctx_count;
610 New (0, stack, 1, coro_stack); 1148 New (0, cctx, 1, coro_cctx);
1149
1150 cctx->gen = cctx_gen;
1151 cctx->flags = 0;
1152 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1153
1154 return cctx;
1155}
1156
1157/* create a new cctx only suitable as source */
1158static coro_cctx *
1159cctx_new_empty ()
1160{
1161 coro_cctx *cctx = cctx_new ();
1162
1163 cctx->sptr = 0;
1164 coro_create (&cctx->cctx, 0, 0, 0, 0);
1165
1166 return cctx;
1167}
1168
1169/* create a new cctx suitable as destination/running a perl interpreter */
1170static coro_cctx *
1171cctx_new_run ()
1172{
1173 coro_cctx *cctx = cctx_new ();
1174 void *stack_start;
1175 size_t stack_size;
611 1176
612#if HAVE_MMAP 1177#if HAVE_MMAP
613
614 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1178 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615 /* mmap suppsedly does allocate-on-write for us */ 1179 /* mmap supposedly does allocate-on-write for us */
616 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1180 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617 1181
618 if (stack->sptr == (void *)-1) 1182 if (cctx->sptr != (void *)-1)
1183 {
1184 #if CORO_STACKGUARD
1185 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1186 #endif
1187 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1188 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1189 cctx->flags |= CC_MAPPED;
619 { 1190 }
1191 else
1192#endif
1193 {
1194 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1195 New (0, cctx->sptr, cctx_stacksize, long);
1196
1197 if (!cctx->sptr)
1198 {
620 perror ("FATAL: unable to mmap stack for coroutine"); 1199 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
621 _exit (EXIT_FAILURE); 1200 _exit (EXIT_FAILURE);
622 } 1201 }
623 1202
624# if STACKGUARD 1203 stack_start = cctx->sptr;
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1204 stack_size = cctx->ssize;
626# endif
627
628#else
629
630 stack->ssize = STACKSIZE * (long)sizeof (long);
631 New (0, stack->sptr, STACKSIZE, long);
632
633 if (!stack->sptr)
634 { 1205 }
635 perror (stderr, "FATAL: unable to malloc stack for coroutine");
636 _exit (EXIT_FAILURE);
637 }
638 1206
1207 #if CORO_USE_VALGRIND
1208 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
639#endif 1209 #endif
640 1210
641 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1211 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
642 1212
643 return stack; 1213 return cctx;
644} 1214}
645 1215
646static void 1216static void
647stack_free (coro_stack *stack) 1217cctx_destroy (coro_cctx *cctx)
648{ 1218{
649 if (!stack) 1219 if (!cctx)
650 return; 1220 return;
651 1221
1222 --cctx_count;
1223 coro_destroy (&cctx->cctx);
1224
1225 /* coro_transfer creates new, empty cctx's */
1226 if (cctx->sptr)
1227 {
1228 #if CORO_USE_VALGRIND
1229 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1230 #endif
1231
652#if HAVE_MMAP 1232#if HAVE_MMAP
653 munmap (stack->sptr, stack->ssize); 1233 if (cctx->flags & CC_MAPPED)
654#else 1234 munmap (cctx->sptr, cctx->ssize);
1235 else
1236#endif
655 Safefree (stack->sptr); 1237 Safefree (cctx->sptr);
656#endif
657
658 Safefree (stack);
659}
660
661static coro_stack *stack_first;
662
663static coro_stack *
664stack_get ()
665{
666 coro_stack *stack;
667
668 if (stack_first)
669 {
670 stack = stack_first;
671 stack_first = stack->next;
672 }
673 else
674 {
675 stack = stack_new ();
676 PL_op = PL_op->op_next;
677 } 1238 }
678 1239
679 return stack; 1240 Safefree (cctx);
680} 1241}
681 1242
682static void 1243/* wether this cctx should be destructed */
683stack_put (coro_stack *stack) 1244#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
684{
685 stack->next = stack_first;
686 stack_first = stack;
687}
688 1245
689/* never call directly, always through the coro_state_transfer global variable */ 1246static coro_cctx *
1247cctx_get (pTHX)
1248{
1249 while (expect_true (cctx_first))
1250 {
1251 coro_cctx *cctx = cctx_first;
1252 cctx_first = cctx->next;
1253 --cctx_idle;
1254
1255 if (expect_true (!CCTX_EXPIRED (cctx)))
1256 return cctx;
1257
1258 cctx_destroy (cctx);
1259 }
1260
1261 return cctx_new_run ();
1262}
1263
690static void 1264static void
1265cctx_put (coro_cctx *cctx)
1266{
1267 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1268
1269 /* free another cctx if overlimit */
1270 if (expect_false (cctx_idle >= cctx_max_idle))
1271 {
1272 coro_cctx *first = cctx_first;
1273 cctx_first = first->next;
1274 --cctx_idle;
1275
1276 cctx_destroy (first);
1277 }
1278
1279 ++cctx_idle;
1280 cctx->next = cctx_first;
1281 cctx_first = cctx;
1282}
1283
1284/** coroutine switching *****************************************************/
1285
1286static void
1287transfer_check (pTHX_ struct coro *prev, struct coro *next)
1288{
1289 /* TODO: throwing up here is considered harmful */
1290
1291 if (expect_true (prev != next))
1292 {
1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1295
1296 if (expect_false (next->flags & CF_RUNNING))
1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1298
1299 if (expect_false (next->flags & CF_DESTROYED))
1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1301
1302#if !PERL_VERSION_ATLEAST (5,10,0)
1303 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1305#endif
1306 }
1307}
1308
1309/* always use the TRANSFER macro */
1310static void NOINLINE /* noinline so we have a fixed stackframe */
691transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
692{ 1312{
693 dSTACKLEVEL; 1313 dSTACKLEVEL;
694 1314
695 /* sometimes transfer is only called to set idle_sp */ 1315 /* sometimes transfer is only called to set idle_sp */
696 if (flags == TRANSFER_SET_STACKLEVEL) 1316 if (expect_false (!next))
697 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1317 {
698 else if (prev != next) 1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
699 { 1320 }
1321 else if (expect_true (prev != next))
1322 {
700 coro_stack *prev__stack; 1323 coro_cctx *prev__cctx;
701 1324
702 LOCK; 1325 if (expect_false (prev->flags & CF_NEW))
703
704 if (next->mainstack)
705 { 1326 {
706 /* coroutine already started */ 1327 /* create a new empty/source context */
707 SAVE (prev, flags); 1328 prev->cctx = cctx_new_empty ();
708 LOAD (next); 1329 prev->flags &= ~CF_NEW;
1330 prev->flags |= CF_RUNNING;
1331 }
1332
1333 prev->flags &= ~CF_RUNNING;
1334 next->flags |= CF_RUNNING;
1335
1336 /* first get rid of the old state */
1337 save_perl (aTHX_ prev);
1338
1339 if (expect_false (next->flags & CF_NEW))
1340 {
1341 /* need to start coroutine */
1342 next->flags &= ~CF_NEW;
1343 /* setup coroutine call */
1344 coro_setup (aTHX_ next);
709 } 1345 }
710 else 1346 else
1347 load_perl (aTHX_ next);
1348
1349 prev__cctx = prev->cctx;
1350
1351 /* possibly untie and reuse the cctx */
1352 if (expect_true (
1353 prev__cctx->idle_sp == (void *)stacklevel
1354 && !(prev__cctx->flags & CC_TRACE)
1355 && !force_cctx
1356 ))
711 { 1357 {
712 /* need to start coroutine */ 1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
713 /* first get rid of the old state */ 1359 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); 1360
715 /* setup coroutine call */ 1361 prev->cctx = 0;
716 setup_coro (next); 1362
717 /* need a stack */ 1363 /* 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; 1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1365 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1366 if (!next->cctx)
1367 next->cctx = cctx_get (aTHX);
1368
1369 cctx_put (prev__cctx);
719 } 1370 }
720 1371
721 if (!prev->stack) 1372 ++next->usecount;
722 /* create a new empty context */
723 Newz (0, prev->stack, 1, coro_stack);
724 1373
725 prev__stack = prev->stack; 1374 if (expect_true (!next->cctx))
1375 next->cctx = cctx_get (aTHX);
726 1376
727 /* possibly "free" the stack */ 1377 if (expect_false (prev__cctx != next->cctx))
728 if (prev__stack->idle_sp == STACKLEVEL)
729 { 1378 {
730 stack_put (prev__stack); 1379 prev__cctx->top_env = PL_top_env;
731 prev->stack = 0; 1380 PL_top_env = next->cctx->top_env;
1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
732 } 1382 }
733 1383
734 if (!next->stack) 1384 transfer_tail (aTHX);
735 next->stack = stack_get ();
736
737 if (prev__stack != next->stack)
738 {
739 prev__stack->top_env = PL_top_env;
740 PL_top_env = next->stack->top_env;
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 } 1385 }
748} 1386}
749 1387
750/* use this function pointer to call the above function */ 1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
751/* this is done to increase chances of the compiler not inlining the call */ 1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754 1390
755struct transfer_args 1391/** high level stuff ********************************************************/
756{
757 struct coro *prev, *next;
758 int flags;
759};
760 1392
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void 1393static int
764coro_state_destroy (struct coro *coro) 1394coro_state_destroy (pTHX_ struct coro *coro)
765{ 1395{
766 if (coro->refcnt--) 1396 if (coro->flags & CF_DESTROYED)
767 return; 1397 return 0;
1398
1399 if (coro->on_destroy)
1400 coro->on_destroy (aTHX_ coro);
1401
1402 coro->flags |= CF_DESTROYED;
1403
1404 if (coro->flags & CF_READY)
1405 {
1406 /* reduce nready, as destroying a ready coro effectively unreadies it */
1407 /* alternative: look through all ready queues and remove the coro */
1408 --coro_nready;
1409 }
1410 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768 1412
769 if (coro->mainstack && coro->mainstack != main_mainstack) 1413 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1414 {
771 struct coro temp; 1415 struct coro temp;
772 1416
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418
1419 save_perl (aTHX_ &temp);
774 LOAD (aTHX_ coro); 1420 load_perl (aTHX_ coro);
775 1421
776 destroy_stacks (aTHX); 1422 coro_destruct (aTHX_ coro);
777 1423
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1424 load_perl (aTHX_ &temp);
779 1425
780 coro->mainstack = 0; 1426 coro->slot = 0;
781 } 1427 }
782 1428
783 stack_free (coro->stack); 1429 cctx_destroy (coro->cctx);
784 SvREFCNT_dec (coro->args); 1430 SvREFCNT_dec (coro->args);
785 Safefree (coro); 1431
1432 if (coro->next) coro->next->prev = coro->prev;
1433 if (coro->prev) coro->prev->next = coro->next;
1434 if (coro == coro_first) coro_first = coro->next;
1435
1436 return 1;
786} 1437}
787 1438
788static int 1439static int
789coro_state_clear (SV *sv, MAGIC *mg) 1440coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790{ 1441{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1442 struct coro *coro = (struct coro *)mg->mg_ptr;
792 mg->mg_ptr = 0; 1443 mg->mg_ptr = 0;
793 1444
1445 coro->hv = 0;
1446
1447 if (--coro->refcnt < 0)
1448 {
794 coro_state_destroy (coro); 1449 coro_state_destroy (aTHX_ coro);
1450 Safefree (coro);
1451 }
795 1452
796 return 0; 1453 return 0;
797} 1454}
798 1455
799static int 1456static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1457coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801{ 1458{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1459 struct coro *coro = (struct coro *)mg->mg_ptr;
803 1460
804 ++coro->refcnt; 1461 ++coro->refcnt;
805 1462
806 return 0; 1463 return 0;
807} 1464}
808 1465
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1466static MGVTBL coro_state_vtbl = {
1467 0, 0, 0, 0,
1468 coro_state_free,
1469 0,
1470#ifdef MGf_DUP
1471 coro_state_dup,
1472#else
1473# define MGf_DUP 0
1474#endif
1475};
810 1476
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void 1477static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1478prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
835{ 1479{
836 ta->prev = SvSTATE (prev); 1480 ta->prev = SvSTATE (prev_sv);
837 ta->next = SvSTATE (next); 1481 ta->next = SvSTATE (next_sv);
838 ta->flags = flags; 1482 TRANSFER_CHECK (*ta);
839} 1483}
840 1484
841static void 1485static void
842api_transfer (SV *prev, SV *next, int flags) 1486api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
843{ 1487{
844 dTHX;
845 struct transfer_args ta; 1488 struct coro_transfer_args ta;
846 1489
847 prepare_transfer (aTHX_ &ta, prev, next, flags); 1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848 TRANSFER (ta); 1491 TRANSFER (ta, 1);
849} 1492}
850 1493
851/** Coro ********************************************************************/ 1494/** Coro ********************************************************************/
852 1495
853#define PRIO_MAX 3 1496INLINE void
854#define PRIO_HIGH 1 1497coro_enq (pTHX_ struct coro *coro)
855#define PRIO_NORMAL 0 1498{
856#define PRIO_LOW -1 1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
857#define PRIO_IDLE -3 1500}
858#define PRIO_MIN -4
859 1501
860/* for Coro.pm */ 1502INLINE SV *
861static GV *coro_current, *coro_idle; 1503coro_deq (pTHX)
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void
866coro_enq (pTHX_ SV *sv)
867{ 1504{
868 int prio; 1505 int prio;
869 1506
870 if (SvTYPE (sv) != SVt_PVHV) 1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
871 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1508 if (AvFILLp (coro_ready [prio]) >= 0)
1509 return av_shift (coro_ready [prio]);
872 1510
873 prio = SvSTATE (sv)->prio; 1511 return 0;
1512}
874 1513
875 av_push (coro_ready [prio - PRIO_MIN], sv); 1514static int
1515api_ready (pTHX_ SV *coro_sv)
1516{
1517 struct coro *coro;
1518 SV *sv_hook;
1519 void (*xs_hook)(void);
1520
1521 if (SvROK (coro_sv))
1522 coro_sv = SvRV (coro_sv);
1523
1524 coro = SvSTATE (coro_sv);
1525
1526 if (coro->flags & CF_READY)
1527 return 0;
1528
1529 coro->flags |= CF_READY;
1530
1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1533
1534 coro_enq (aTHX_ coro);
876 coro_nready++; 1535 ++coro_nready;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1555
1556 return 1;
1557}
1558
1559static int
1560api_is_ready (pTHX_ SV *coro_sv)
1561{
1562 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1563}
1564
1565INLINE void
1566prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1567{
1568 SV *prev_sv, *next_sv;
1569
1570 for (;;)
1571 {
1572 next_sv = coro_deq (aTHX);
1573
1574 /* nothing to schedule: call the idle handler */
1575 if (expect_false (!next_sv))
1576 {
1577 dSP;
1578
1579 ENTER;
1580 SAVETMPS;
1581
1582 PUSHMARK (SP);
1583 PUTBACK;
1584 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1585 SPAGAIN;
1586
1587 FREETMPS;
1588 LEAVE;
1589 continue;
1590 }
1591
1592 ta->next = SvSTATE_hv (next_sv);
1593
1594 /* cannot transfer to destroyed coros, skip and look for next */
1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1596 {
1597 SvREFCNT_dec (next_sv);
1598 /* coro_nready has already been taken care of by destroy */
1599 continue;
1600 }
1601
1602 --coro_nready;
1603 break;
1604 }
1605
1606 /* free this only after the transfer */
1607 prev_sv = SvRV (coro_current);
1608 ta->prev = SvSTATE_hv (prev_sv);
1609 TRANSFER_CHECK (*ta);
1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1611 ta->next->flags &= ~CF_READY;
1612 SvRV_set (coro_current, next_sv);
1613
1614 free_coro_mortal (aTHX);
1615 coro_mortal = prev_sv;
1616}
1617
1618INLINE void
1619prepare_cede (pTHX_ struct coro_transfer_args *ta)
1620{
1621 api_ready (aTHX_ coro_current);
1622 prepare_schedule (aTHX_ ta);
1623}
1624
1625INLINE void
1626prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1627{
1628 SV *prev = SvRV (coro_current);
1629
1630 if (coro_nready)
1631 {
1632 prepare_schedule (aTHX_ ta);
1633 api_ready (aTHX_ prev);
1634 }
1635 else
1636 prepare_nop (aTHX_ ta);
1637}
1638
1639static void
1640api_schedule (pTHX)
1641{
1642 struct coro_transfer_args ta;
1643
1644 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1);
1646}
1647
1648static int
1649api_cede (pTHX)
1650{
1651 struct coro_transfer_args ta;
1652
1653 prepare_cede (aTHX_ &ta);
1654
1655 if (expect_true (ta.prev != ta.next))
1656 {
1657 TRANSFER (ta, 1);
1658 return 1;
1659 }
1660 else
1661 return 0;
1662}
1663
1664static int
1665api_cede_notself (pTHX)
1666{
1667 if (coro_nready)
1668 {
1669 struct coro_transfer_args ta;
1670
1671 prepare_cede_notself (aTHX_ &ta);
1672 TRANSFER (ta, 1);
1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
1678
1679static void
1680api_trace (pTHX_ SV *coro_sv, int flags)
1681{
1682 struct coro *coro = SvSTATE (coro_sv);
1683
1684 if (flags & CC_TRACE)
1685 {
1686 if (!coro->cctx)
1687 coro->cctx = cctx_new_run ();
1688 else if (!(coro->cctx->flags & CC_TRACE))
1689 croak ("cannot enable tracing on coroutine with custom stack,");
1690
1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1692 }
1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1694 {
1695 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1696
1697 if (coro->flags & CF_RUNNING)
1698 PL_runops = RUNOPS_DEFAULT;
1699 else
1700 coro->slot->runops = RUNOPS_DEFAULT;
1701 }
1702}
1703
1704/*****************************************************************************/
1705/* PerlIO::cede */
1706
1707typedef struct
1708{
1709 PerlIOBuf base;
1710 NV next, every;
1711} PerlIOCede;
1712
1713static IV
1714PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1715{
1716 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1717
1718 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1719 self->next = nvtime () + self->every;
1720
1721 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
877} 1722}
878 1723
879static SV * 1724static SV *
880coro_deq (pTHX_ int min_prio) 1725PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
881{ 1726{
882 int prio = PRIO_MAX - PRIO_MIN; 1727 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
883 1728
884 min_prio -= PRIO_MIN; 1729 return newSVnv (self->every);
885 if (min_prio < 0) 1730}
886 min_prio = 0;
887 1731
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1732static IV
889 if (AvFILLp (coro_ready [prio]) >= 0) 1733PerlIOCede_flush (pTHX_ PerlIO *f)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736 double now = nvtime ();
1737
1738 if (now >= self->next)
1739 {
1740 api_cede (aTHX);
1741 self->next = now + self->every;
1742 }
1743
1744 return PerlIOBuf_flush (aTHX_ f);
1745}
1746
1747static PerlIO_funcs PerlIO_cede =
1748{
1749 sizeof(PerlIO_funcs),
1750 "cede",
1751 sizeof(PerlIOCede),
1752 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1753 PerlIOCede_pushed,
1754 PerlIOBuf_popped,
1755 PerlIOBuf_open,
1756 PerlIOBase_binmode,
1757 PerlIOCede_getarg,
1758 PerlIOBase_fileno,
1759 PerlIOBuf_dup,
1760 PerlIOBuf_read,
1761 PerlIOBuf_unread,
1762 PerlIOBuf_write,
1763 PerlIOBuf_seek,
1764 PerlIOBuf_tell,
1765 PerlIOBuf_close,
1766 PerlIOCede_flush,
1767 PerlIOBuf_fill,
1768 PerlIOBase_eof,
1769 PerlIOBase_error,
1770 PerlIOBase_clearerr,
1771 PerlIOBase_setlinebuf,
1772 PerlIOBuf_get_base,
1773 PerlIOBuf_bufsiz,
1774 PerlIOBuf_get_ptr,
1775 PerlIOBuf_get_cnt,
1776 PerlIOBuf_set_ptrcnt,
1777};
1778
1779/*****************************************************************************/
1780
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP *
1791pp_restore (pTHX)
1792{
1793 int i;
1794 SV **SP = PL_stack_base + slf_ax;
1795
1796 PUSHMARK (SP);
1797
1798 EXTEND (SP, slf_argc + 1);
1799
1800 for (i = 0; i < slf_argc; ++i)
1801 PUSHs (sv_2mortal (slf_argv [i]));
1802
1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806}
1807
1808static void
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
1934
1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
890 { 1937 {
891 coro_nready--; 1938 if (sp == bot)
892 return av_shift (coro_ready [prio]); 1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
893 } 1942 }
894 1943
895 return 0;
896}
897
898static void
899api_ready (SV *coro)
900{
901 dTHX;
902
903 if (SvROK (coro))
904 coro = SvRV (coro);
905
906 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro));
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 1944 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD); 1945 }
940 1946
941 FREETMPS; 1947 /* exception handling */
942 LEAVE; 1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
943 } 1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
1966
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (items > slf_arga)
944 } 1988 {
1989 slf_arga = items;
1990 free (slf_argv);
1991 slf_argv = malloc (slf_arga * sizeof (SV *));
1992 }
945 1993
946 prev = SvRV (current); 1994 slf_argc = items;
947 SvRV (current) = next;
948 1995
949 /* free this only after the transfer */ 1996 for (i = 0; i < items; ++i)
950 free_coro_mortal (); 1997 slf_argv [i] = SvREFCNT_inc (arg [i]);
951 coro_mortal = prev;
952 1998
953 ta->prev = SvSTATE (prev); 1999 PL_op->op_ppaddr = pp_slf;
954 ta->next = SvSTATE (next); 2000 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
955 ta->flags = TRANSFER_SAVE_ALL;
956 2001
957 UNLOCK; 2002 PL_op = (OP *)&slf_restore;
958} 2003}
959 2004
2005/*****************************************************************************/
2006
2007static void
2008coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2009{
2010 SV *count_sv = AvARRAY (av)[0];
2011 IV count = SvIVX (count_sv);
2012
2013 count += adjust;
2014 SvIVX (count_sv) = count;
2015
2016 /* now wake up as many waiters as are expected to lock */
2017 while (count > 0 && AvFILLp (av) > 0)
2018 {
2019 SV *cb;
2020
2021 /* swap first two elements so we can shift a waiter */
2022 AvARRAY (av)[0] = AvARRAY (av)[1];
2023 AvARRAY (av)[1] = count_sv;
2024 cb = av_shift (av);
2025
2026 if (SvOBJECT (cb))
2027 api_ready (aTHX_ cb);
2028 else
2029 croak ("callbacks not yet supported");
2030
2031 SvREFCNT_dec (cb);
2032
2033 --count;
2034 }
2035}
2036
2037static void
2038coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2039{
2040 /* call $sem->adjust (0) to possibly wake up some other waiters */
2041 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2042}
2043
960static void 2044static int
961prepare_cede (aTHX_ struct transfer_args *ta) 2045slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
962{ 2046{
963 LOCK; 2047 AV *av = (AV *)frame->data;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 2048 SV *count_sv = AvARRAY (av)[0];
965 UNLOCK;
966 2049
967 prepare_schedule (ta); 2050 if (SvIVX (count_sv) > 0)
968} 2051 {
2052 SvSTATE_current->on_destroy = 0;
2053 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2054 return 0;
2055 }
2056 else
2057 {
2058 int i;
2059 /* if we were woken up but can't down, we look through the whole */
2060 /* waiters list and only add us if we aren't in there already */
2061 /* this avoids some degenerate memory usage cases */
969 2062
970static void 2063 for (i = 1; i <= AvFILLp (av); ++i)
971api_schedule (void) 2064 if (AvARRAY (av)[i] == SvRV (coro_current))
972{ 2065 return 1;
973 dTHX;
974 struct transfer_args ta;
975 2066
976 prepare_schedule (&ta); 2067 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
977 TRANSFER (ta); 2068 return 1;
2069 }
978} 2070}
979 2071
980static void 2072static void
981api_cede (void) 2073slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
982{ 2074{
983 dTHX; 2075 AV *av = (AV *)SvRV (arg [0]);
984 struct transfer_args ta;
985 2076
986 prepare_cede (&ta); 2077 if (SvIVX (AvARRAY (av)[0]) > 0)
987 TRANSFER (ta); 2078 {
988} 2079 frame->data = (void *)av;
2080 frame->prepare = prepare_nop;
2081 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2082 }
2083 else
2084 {
2085 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
989 2086
2087 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2088 frame->prepare = prepare_schedule;
2089
2090 /* to avoid race conditions when a woken-up coro gets terminated */
2091 /* we arrange for a temporary on_destroy that calls adjust (0) */
2092 assert (!SvSTATE_current->on_destroy);//D
2093 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2094 }
2095
2096 frame->check = slf_check_semaphore_down;
2097
2098}
2099
2100/*****************************************************************************/
2101
2102#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2103
2104/* create a closure from XS, returns a code reference */
2105/* the arg can be accessed via GENSUB_ARG from the callback */
2106/* the callback must use dXSARGS/XSRETURN */
2107static SV *
2108gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2109{
2110 CV *cv = (CV *)NEWSV (0, 0);
2111
2112 sv_upgrade ((SV *)cv, SVt_PVCV);
2113
2114 CvANON_on (cv);
2115 CvISXSUB_on (cv);
2116 CvXSUB (cv) = xsub;
2117 GENSUB_ARG = arg;
2118
2119 return newRV_noinc ((SV *)cv);
2120}
2121
2122/*****************************************************************************/
2123
990MODULE = Coro::State PACKAGE = Coro::State 2124MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 2125
992PROTOTYPES: DISABLE 2126PROTOTYPES: DISABLE
993 2127
994BOOT: 2128BOOT:
995{ 2129{
996#ifdef USE_ITHREADS 2130#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 2131# if CORO_PTHREAD
2132 coro_thx = PERL_GET_CONTEXT;
2133# endif
998#endif 2134#endif
999 BOOT_PAGESIZE; 2135 BOOT_PAGESIZE;
1000 2136
2137 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2138 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2139
2140 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2141 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2142 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2143
2144 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2145 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2146 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2147
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2148 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 2149
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2150 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2151 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2152 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2153 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 2154
1007 main_mainstack = PL_mainstack; 2155 main_mainstack = PL_mainstack;
2156 main_top_env = PL_top_env;
1008 2157
2158 while (main_top_env->je_prev)
2159 main_top_env = main_top_env->je_prev;
2160
2161 {
2162 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2163
2164 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2165 hv_store_ent (PL_custom_op_names, slf,
2166 newSVpv ("coro_slf", 0), 0);
2167
2168 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2169 hv_store_ent (PL_custom_op_descs, slf,
2170 newSVpv ("coro schedule like function", 0), 0);
2171 }
2172
1009 coroapi.ver = CORO_API_VERSION; 2173 coroapi.ver = CORO_API_VERSION;
2174 coroapi.rev = CORO_API_REVISION;
2175
1010 coroapi.transfer = api_transfer; 2176 coroapi.transfer = api_transfer;
2177
2178 coroapi.sv_state = SvSTATE_;
2179 coroapi.execute_slf = api_execute_slf;
2180 coroapi.prepare_nop = prepare_nop;
2181 coroapi.prepare_schedule = prepare_schedule;
2182 coroapi.prepare_cede = prepare_cede;
2183 coroapi.prepare_cede_notself = prepare_cede_notself;
2184
2185 {
2186 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2187
2188 if (!svp) croak ("Time::HiRes is required");
2189 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2190
2191 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2192 }
1011 2193
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2194 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 2195}
1014 2196
1015SV * 2197SV *
1016new (char *klass, ...) 2198new (char *klass, ...)
1017 CODE: 2199 CODE:
1018{ 2200{
1019 struct coro *coro; 2201 struct coro *coro;
2202 MAGIC *mg;
1020 HV *hv; 2203 HV *hv;
1021 int i; 2204 int i;
1022 2205
1023 Newz (0, coro, 1, struct coro); 2206 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 2207 coro->args = newAV ();
2208 coro->flags = CF_NEW;
1025 2209
2210 if (coro_first) coro_first->prev = coro;
2211 coro->next = coro_first;
2212 coro_first = coro;
2213
1026 hv = newHV (); 2214 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2215 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2216 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2217 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 2218
2219 av_extend (coro->args, items - 1);
1030 for (i = 1; i < items; i++) 2220 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 2221 av_push (coro->args, newSVsv (ST (i)));
1032
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 2222}
1036 OUTPUT: 2223 OUTPUT:
1037 RETVAL 2224 RETVAL
1038 2225
1039void 2226void
1040_set_stacklevel (...) 2227_set_stacklevel (...)
1041 ALIAS: 2228 CODE:
1042 Coro::State::transfer = 1 2229 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1043 Coro::schedule = 2
1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
1046 CODE:
1047{
1048 struct transfer_args ta;
1049
1050 switch (ix)
1051 {
1052 case 0:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1054 ta.next = 0;
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break;
1057
1058 case 1:
1059 if (items != 3)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1061
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1063 break;
1064
1065 case 2:
1066 prepare_schedule (&ta);
1067 break;
1068
1069 case 3:
1070 prepare_cede (&ta);
1071 break;
1072
1073 case 4:
1074 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break;
1098
1099 }
1100
1101 TRANSFER (ta);
1102}
1103 2230
1104void 2231void
1105_clone_state_from (SV *dst, SV *src) 2232transfer (...)
2233 PROTOTYPE: $$
1106 CODE: 2234 CODE:
1107{ 2235 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1108 struct coro *coro_src = SvSTATE (src);
1109 2236
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2237bool
1111 2238_destroy (SV *coro_sv)
1112 ++coro_src->refcnt; 2239 CODE:
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2240 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1114} 2241 OUTPUT:
2242 RETVAL
1115 2243
1116void 2244void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 2245_exit (int code)
1124 int code
1125 PROTOTYPE: $ 2246 PROTOTYPE: $
1126 CODE: 2247 CODE:
1127 _exit (code); 2248 _exit (code);
1128 2249
2250int
2251cctx_stacksize (int new_stacksize = 0)
2252 PROTOTYPE: ;$
2253 CODE:
2254 RETVAL = cctx_stacksize;
2255 if (new_stacksize)
2256 {
2257 cctx_stacksize = new_stacksize;
2258 ++cctx_gen;
2259 }
2260 OUTPUT:
2261 RETVAL
2262
2263int
2264cctx_max_idle (int max_idle = 0)
2265 PROTOTYPE: ;$
2266 CODE:
2267 RETVAL = cctx_max_idle;
2268 if (max_idle > 1)
2269 cctx_max_idle = max_idle;
2270 OUTPUT:
2271 RETVAL
2272
2273int
2274cctx_count ()
2275 PROTOTYPE:
2276 CODE:
2277 RETVAL = cctx_count;
2278 OUTPUT:
2279 RETVAL
2280
2281int
2282cctx_idle ()
2283 PROTOTYPE:
2284 CODE:
2285 RETVAL = cctx_idle;
2286 OUTPUT:
2287 RETVAL
2288
2289void
2290list ()
2291 PROTOTYPE:
2292 PPCODE:
2293{
2294 struct coro *coro;
2295 for (coro = coro_first; coro; coro = coro->next)
2296 if (coro->hv)
2297 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2298}
2299
2300void
2301call (Coro::State coro, SV *coderef)
2302 ALIAS:
2303 eval = 1
2304 CODE:
2305{
2306 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2307 {
2308 struct coro temp;
2309
2310 if (!(coro->flags & CF_RUNNING))
2311 {
2312 PUTBACK;
2313 save_perl (aTHX_ &temp);
2314 load_perl (aTHX_ coro);
2315 }
2316
2317 {
2318 dSP;
2319 ENTER;
2320 SAVETMPS;
2321 PUTBACK;
2322 PUSHSTACK;
2323 PUSHMARK (SP);
2324
2325 if (ix)
2326 eval_sv (coderef, 0);
2327 else
2328 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2329
2330 POPSTACK;
2331 SPAGAIN;
2332 FREETMPS;
2333 LEAVE;
2334 PUTBACK;
2335 }
2336
2337 if (!(coro->flags & CF_RUNNING))
2338 {
2339 save_perl (aTHX_ coro);
2340 load_perl (aTHX_ &temp);
2341 SPAGAIN;
2342 }
2343 }
2344}
2345
2346SV *
2347is_ready (Coro::State coro)
2348 PROTOTYPE: $
2349 ALIAS:
2350 is_ready = CF_READY
2351 is_running = CF_RUNNING
2352 is_new = CF_NEW
2353 is_destroyed = CF_DESTROYED
2354 CODE:
2355 RETVAL = boolSV (coro->flags & ix);
2356 OUTPUT:
2357 RETVAL
2358
2359void
2360throw (Coro::State self, SV *throw = &PL_sv_undef)
2361 PROTOTYPE: $;$
2362 CODE:
2363{
2364 struct coro *current = SvSTATE_current;
2365 SV **throwp = self == current ? &coro_throw : &self->throw;
2366 SvREFCNT_dec (*throwp);
2367 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2368}
2369
2370void
2371api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2372 PROTOTYPE: $;$
2373 C_ARGS: aTHX_ coro, flags
2374
2375SV *
2376has_cctx (Coro::State coro)
2377 PROTOTYPE: $
2378 CODE:
2379 RETVAL = boolSV (!!coro->cctx);
2380 OUTPUT:
2381 RETVAL
2382
2383int
2384is_traced (Coro::State coro)
2385 PROTOTYPE: $
2386 CODE:
2387 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2388 OUTPUT:
2389 RETVAL
2390
2391UV
2392rss (Coro::State coro)
2393 PROTOTYPE: $
2394 ALIAS:
2395 usecount = 1
2396 CODE:
2397 switch (ix)
2398 {
2399 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2400 case 1: RETVAL = coro->usecount; break;
2401 }
2402 OUTPUT:
2403 RETVAL
2404
2405void
2406force_cctx ()
2407 PROTOTYPE:
2408 CODE:
2409 SvSTATE_current->cctx->idle_sp = 0;
2410
2411void
2412swap_defsv (Coro::State self)
2413 PROTOTYPE: $
2414 ALIAS:
2415 swap_defav = 1
2416 CODE:
2417 if (!self->slot)
2418 croak ("cannot swap state with coroutine that has no saved state,");
2419 else
2420 {
2421 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2422 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2423
2424 SV *tmp = *src; *src = *dst; *dst = tmp;
2425 }
2426
1129MODULE = Coro::State PACKAGE = Coro 2427MODULE = Coro::State PACKAGE = Coro
1130 2428
1131BOOT: 2429BOOT:
1132{ 2430{
1133 int i; 2431 int i;
1134 2432
2433 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2434 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2435 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2436
2437 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2438 SvREADONLY_on (coro_current);
2439
1135 coro_stash = gv_stashpv ("Coro", TRUE); 2440 coro_stash = gv_stashpv ("Coro", TRUE);
1136 2441
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2442 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2443 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2444 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2445 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2446 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2447 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 2448
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2449 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 2450 coro_ready[i] = newAV ();
1149 2451
1150 { 2452 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 2453 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 2454
1153 coroapi.schedule = api_schedule; 2455 coroapi.schedule = api_schedule;
1154 coroapi.cede = api_cede; 2456 coroapi.cede = api_cede;
2457 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 2458 coroapi.ready = api_ready;
2459 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 2460 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 2461 coroapi.current = coro_current;
1158 2462
1159 GCoroAPI = &coroapi; 2463 GCoroAPI = &coroapi;
1160 sv_setiv (sv, (IV)&coroapi); 2464 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 2465 SvREADONLY_on (sv);
1162 } 2466 }
1163} 2467}
1164 2468
2469void
2470schedule (...)
2471 CODE:
2472 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2473
2474void
2475cede (...)
2476 CODE:
2477 CORO_EXECUTE_SLF_XS (slf_init_cede);
2478
2479void
2480cede_notself (...)
2481 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2483
2484void
2485_set_current (SV *current)
2486 PROTOTYPE: $
2487 CODE:
2488 SvREFCNT_dec (SvRV (coro_current));
2489 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2490
2491void
2492_set_readyhook (SV *hook)
2493 PROTOTYPE: $
2494 CODE:
2495 SvREFCNT_dec (coro_readyhook);
2496 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2497
1165int 2498int
1166prio (Coro::State coro, int newprio = 0) 2499prio (Coro::State coro, int newprio = 0)
2500 PROTOTYPE: $;$
1167 ALIAS: 2501 ALIAS:
1168 nice = 1 2502 nice = 1
1169 CODE: 2503 CODE:
1170{ 2504{
1171 RETVAL = coro->prio; 2505 RETVAL = coro->prio;
1172 2506
1173 if (items > 1) 2507 if (items > 1)
1174 { 2508 {
1175 if (ix) 2509 if (ix)
1176 newprio += coro->prio; 2510 newprio = coro->prio - newprio;
1177 2511
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2512 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2513 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 2514
1181 coro->prio = newprio; 2515 coro->prio = newprio;
1182 } 2516 }
1183} 2517}
2518 OUTPUT:
2519 RETVAL
1184 2520
1185void 2521SV *
1186ready (SV *self) 2522ready (SV *self)
1187 PROTOTYPE: $ 2523 PROTOTYPE: $
1188 CODE: 2524 CODE:
1189 api_ready (self); 2525 RETVAL = boolSV (api_ready (aTHX_ self));
2526 OUTPUT:
2527 RETVAL
1190 2528
1191int 2529int
1192nready (...) 2530nready (...)
1193 PROTOTYPE: 2531 PROTOTYPE:
1194 CODE: 2532 CODE:
1195 RETVAL = coro_nready; 2533 RETVAL = coro_nready;
1196 OUTPUT: 2534 OUTPUT:
1197 RETVAL 2535 RETVAL
1198 2536
2537# for async_pool speedup
2538void
2539_pool_1 (SV *cb)
2540 CODE:
2541{
2542 HV *hv = (HV *)SvRV (coro_current);
2543 struct coro *coro = SvSTATE_hv ((SV *)hv);
2544 AV *defav = GvAV (PL_defgv);
2545 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2546 AV *invoke_av;
2547 int i, len;
2548
2549 if (!invoke)
2550 {
2551 SV *old = PL_diehook;
2552 PL_diehook = 0;
2553 SvREFCNT_dec (old);
2554 croak ("\3async_pool terminate\2\n");
2555 }
2556
2557 SvREFCNT_dec (coro->saved_deffh);
2558 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2559
2560 hv_store (hv, "desc", sizeof ("desc") - 1,
2561 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2562
2563 invoke_av = (AV *)SvRV (invoke);
2564 len = av_len (invoke_av);
2565
2566 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2567
2568 if (len > 0)
2569 {
2570 av_fill (defav, len - 1);
2571 for (i = 0; i < len; ++i)
2572 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2573 }
2574}
2575
2576void
2577_pool_2 (SV *cb)
2578 CODE:
2579{
2580 HV *hv = (HV *)SvRV (coro_current);
2581 struct coro *coro = SvSTATE_hv ((SV *)hv);
2582
2583 sv_setsv (cb, &PL_sv_undef);
2584
2585 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2586 coro->saved_deffh = 0;
2587
2588 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2589 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2590 {
2591 SV *old = PL_diehook;
2592 PL_diehook = 0;
2593 SvREFCNT_dec (old);
2594 croak ("\3async_pool terminate\2\n");
2595 }
2596
2597 av_clear (GvAV (PL_defgv));
2598 hv_store (hv, "desc", sizeof ("desc") - 1,
2599 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2600
2601 coro->prio = 0;
2602
2603 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2604 api_trace (aTHX_ coro_current, 0);
2605
2606 av_push (av_async_pool, newSVsv (coro_current));
2607}
2608
2609
1199MODULE = Coro::State PACKAGE = Coro::AIO 2610MODULE = Coro::State PACKAGE = Coro::AIO
1200 2611
2612void
2613_get_state (SV *self)
2614 PROTOTYPE: $
2615 PPCODE:
2616{
2617 AV *defav = GvAV (PL_defgv);
2618 AV *av = newAV ();
2619 int i;
2620 SV *data_sv = newSV (sizeof (struct io_state));
2621 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2622 SvCUR_set (data_sv, sizeof (struct io_state));
2623 SvPOK_only (data_sv);
2624
2625 data->errorno = errno;
2626 data->laststype = PL_laststype;
2627 data->laststatval = PL_laststatval;
2628 data->statcache = PL_statcache;
2629
2630 av_extend (av, AvFILLp (defav) + 1 + 1);
2631
2632 for (i = 0; i <= AvFILLp (defav); ++i)
2633 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2634
2635 av_push (av, data_sv);
2636
2637 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2638
2639 api_ready (aTHX_ self);
2640}
2641
2642void
2643_set_state (SV *state)
2644 PROTOTYPE: $
2645 PPCODE:
2646{
2647 AV *av = (AV *)SvRV (state);
2648 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2649 int i;
2650
2651 errno = data->errorno;
2652 PL_laststype = data->laststype;
2653 PL_laststatval = data->laststatval;
2654 PL_statcache = data->statcache;
2655
2656 EXTEND (SP, AvFILLp (av));
2657 for (i = 0; i < AvFILLp (av); ++i)
2658 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2659}
2660
2661
2662MODULE = Coro::State PACKAGE = Coro::AnyEvent
2663
2664BOOT:
2665 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2666
2667void
2668_schedule (...)
2669 CODE:
2670{
2671 static int incede;
2672
2673 api_cede_notself (aTHX);
2674
2675 ++incede;
2676 while (coro_nready >= incede && api_cede (aTHX))
2677 ;
2678
2679 sv_setsv (sv_activity, &PL_sv_undef);
2680 if (coro_nready >= incede)
2681 {
2682 PUSHMARK (SP);
2683 PUTBACK;
2684 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2685 SPAGAIN;
2686 }
2687
2688 --incede;
2689}
2690
2691
2692MODULE = Coro::State PACKAGE = PerlIO::cede
2693
2694BOOT:
2695 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2696
2697MODULE = Coro::State PACKAGE = Coro::Semaphore
2698
1201SV * 2699SV *
1202_get_state () 2700new (SV *klass, SV *count_ = 0)
1203 CODE: 2701 CODE:
1204{ 2702{
1205 struct { 2703 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1206 int errorno; 2704 AV *av = newAV ();
1207 int laststype; 2705 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1208 int laststatval; 2706 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1209 Stat_t statcache;
1210 } data;
1211
1212 data.errorno = errno;
1213 data.laststype = PL_laststype;
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218} 2707}
1219 OUTPUT: 2708 OUTPUT:
1220 RETVAL 2709 RETVAL
1221 2710
2711SV *
2712count (SV *self)
2713 CODE:
2714 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2715 OUTPUT:
2716 RETVAL
2717
1222void 2718void
1223_set_state (char *data_) 2719up (SV *self, int adjust = 1)
1224 PROTOTYPE: $ 2720 ALIAS:
2721 adjust = 1
2722 CODE:
2723 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2724
2725void
2726down (SV *self)
2727 CODE:
2728 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2729
2730void
2731try (SV *self)
2732 PPCODE:
2733{
2734 AV *av = (AV *)SvRV (self);
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 if (count > 0)
2739 {
2740 --count;
2741 SvIVX (count_sv) = count;
2742 XSRETURN_YES;
2743 }
2744 else
2745 XSRETURN_NO;
2746}
2747
2748void
2749waiters (SV *self)
1225 CODE: 2750 CODE:
1226{ 2751{
1227 struct { 2752 AV *av = (AV *)SvRV (self);
2753
2754 if (GIMME_V == G_SCALAR)
2755 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2756 else
2757 {
1228 int errorno; 2758 int i;
1229 int laststype; 2759 EXTEND (SP, AvFILLp (av) + 1 - 1);
1230 int laststatval; 2760 for (i = 1; i <= AvFILLp (av); ++i)
1231 Stat_t statcache; 2761 PUSHs (newSVsv (AvARRAY (av)[i]));
1232 } *data = (void *)data_; 2762 }
1233
1234 errno = data->errorno;
1235 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache;
1238} 2763}
2764

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