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Comparing Coro/Coro/State.xs (file contents):
Revision 1.138 by root, Sun Jan 14 20:49:45 2007 UTC vs.
Revision 1.320 by root, Fri Nov 21 07:29:04 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
48 61
49#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
50# ifndef PL_ppaddr 63# ifndef PL_ppaddr
51# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
52# endif 65# endif
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
70/* 5.8.7 */ 107/* 5.8.7 */
71#ifndef SvRV_set 108#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 109# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 110#endif
74 111
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 113# undef CORO_STACKGUARD
77#endif 114#endif
78 115
79#ifndef STACKGUARD 116#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 117# define CORO_STACKGUARD 0
81#endif 118#endif
82 119
83/* prefer perl internal functions over our own? */ 120/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 121#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 122# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 123#endif
87 124
88/* The next macro should declare a variable stacklevel that contains and approximation 125/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 126 * portable way as possible. */
90 * and should be unique. */ 127#if __GNUC__ >= 4
91#define dSTACKLEVEL int stacklevel 128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
92#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
93 134
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
95 136
96#if __GNUC__ >= 3 137#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
99#else 141#else
100# define attribute(x) 142# define attribute(x)
101# define BARRIER 143# define expect(expr,value) (expr)
144# define INLINE static
102#endif 145#endif
103 146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
149
104#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
105 151
106#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
107 154
108#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
109static perl_mutex coro_mutex; 156# if CORO_PTHREAD
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static void *coro_thx;
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 158# endif
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif 159#endif
116 160
117/* helper storage struct for Coro::AIO */ 161static double (*nvtime)(); /* so why doesn't it take void? */
118struct io_state
119{
120 int errorno;
121 I32 laststype;
122 int laststatval;
123 Stat_t statcache;
124};
125 162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
126static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
127static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
128static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
129static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177
178static GV *irsgv; /* $/ */
179static GV *stdoutgv; /* *STDOUT */
180static SV *rv_diehook;
181static SV *rv_warnhook;
182static HV *hv_sig; /* %SIG */
183
184/* async_pool helper stuff */
185static SV *sv_pool_rss;
186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191static CV *cv_coro_state_new;
192
193/* Coro::AnyEvent */
194static SV *sv_activity;
130 195
131static struct coro_cctx *cctx_first; 196static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 197static int cctx_count, cctx_idle;
133 198
199enum {
200 CC_MAPPED = 0x01,
201 CC_NOREUSE = 0x02, /* throw this away after tracing */
202 CC_TRACE = 0x04,
203 CC_TRACE_SUB = 0x08, /* trace sub calls */
204 CC_TRACE_LINE = 0x10, /* trace each statement */
205 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
206};
207
134/* this is a structure representing a c-level coroutine */ 208/* this is a structure representing a c-level coroutine */
135typedef struct coro_cctx { 209typedef struct coro_cctx
210{
136 struct coro_cctx *next; 211 struct coro_cctx *next;
137 212
138 /* the stack */ 213 /* the stack */
139 void *sptr; 214 void *sptr;
140 long ssize; /* positive == mmap, otherwise malloc */ 215 size_t ssize;
141 216
142 /* cpu state */ 217 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 218 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 219 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env; 220 JMPENV *top_env;
146 coro_context cctx; 221 coro_context cctx;
147 222
148 int inuse; 223 U32 gen;
149
150#if USE_VALGRIND 224#if CORO_USE_VALGRIND
151 int valgrind_id; 225 int valgrind_id;
152#endif 226#endif
227 unsigned char flags;
153} coro_cctx; 228} coro_cctx;
154 229
155enum { 230enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */ 231 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 232 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */ 233 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 234 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160}; 235};
161 236
162/* this is a structure representing a perl-level coroutine */ 237/* the structure where most of the perl state is stored, overlaid on the cxstack */
163struct coro { 238typedef struct
164 /* the c coroutine allocated to this perl coroutine, if any */ 239{
165 coro_cctx *cctx; 240 SV *defsv;
166 241 AV *defav;
167 /* data associated with this coroutine (initial args) */ 242 SV *errsv;
168 AV *args; 243 SV *irsgv;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */
172
173 /* optionally saved, might be zero */
174 AV *defav; /* @_ */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name; 244#define VAR(name,type) type name;
181# include "state.h" 245# include "state.h"
182#undef VAR 246#undef VAR
247} perl_slots;
248
249#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
250
251/* this is a structure representing a perl-level coroutine */
252struct coro {
253 /* the C coroutine allocated to this perl coroutine, if any */
254 coro_cctx *cctx;
255
256 /* state data */
257 struct CoroSLF slf_frame; /* saved slf frame */
258 AV *mainstack;
259 perl_slots *slot; /* basically the saved sp */
260
261 CV *startcv; /* the CV to execute */
262 AV *args; /* data associated with this coroutine (initial args) */
263 int refcnt; /* coroutines are refcounted, yes */
264 int flags; /* CF_ flags */
265 HV *hv; /* the perl hash associated with this coro, if any */
266 void (*on_destroy)(pTHX_ struct coro *coro);
267
268 /* statistics */
269 int usecount; /* number of transfers to this coro */
183 270
184 /* coro process data */ 271 /* coro process data */
185 int prio; 272 int prio;
273 SV *except; /* exception to be thrown */
274 SV *rouse_cb;
275
276 /* async_pool */
277 SV *saved_deffh;
278 SV *invoke_cb;
279 AV *invoke_av;
280
281 /* linked list */
282 struct coro *next, *prev;
186}; 283};
187 284
188typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
189typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
287
288/* the following variables are effectively part of the perl context */
289/* and get copied between struct coro and these variables */
290/* the mainr easonw e don't support windows process emulation */
291static struct CoroSLF slf_frame; /* the current slf frame */
190 292
191/** Coro ********************************************************************/ 293/** Coro ********************************************************************/
192 294
193#define PRIO_MAX 3 295#define PRIO_MAX 3
194#define PRIO_HIGH 1 296#define PRIO_HIGH 1
… …
197#define PRIO_IDLE -3 299#define PRIO_IDLE -3
198#define PRIO_MIN -4 300#define PRIO_MIN -4
199 301
200/* for Coro.pm */ 302/* for Coro.pm */
201static SV *coro_current; 303static SV *coro_current;
304static SV *coro_readyhook;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 305static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
203static int coro_nready; 306static CV *cv_coro_run, *cv_coro_terminate;
307static struct coro *coro_first;
308#define coro_nready coroapi.nready
204 309
205/** lowlevel stuff **********************************************************/ 310/** lowlevel stuff **********************************************************/
206 311
312static SV *
313coro_get_sv (pTHX_ const char *name, int create)
314{
315#if PERL_VERSION_ATLEAST (5,10,0)
316 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
317 get_sv (name, create);
318#endif
319 return get_sv (name, create);
320}
321
207static AV * 322static AV *
323coro_get_av (pTHX_ const char *name, int create)
324{
325#if PERL_VERSION_ATLEAST (5,10,0)
326 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
327 get_av (name, create);
328#endif
329 return get_av (name, create);
330}
331
332static HV *
333coro_get_hv (pTHX_ const char *name, int create)
334{
335#if PERL_VERSION_ATLEAST (5,10,0)
336 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
337 get_hv (name, create);
338#endif
339 return get_hv (name, create);
340}
341
342/* may croak */
343INLINE CV *
344coro_sv_2cv (pTHX_ SV *sv)
345{
346 HV *st;
347 GV *gvp;
348 return sv_2cv (sv, &st, &gvp, 0);
349}
350
351static AV *
208coro_clone_padlist (CV *cv) 352coro_clone_padlist (pTHX_ CV *cv)
209{ 353{
210 AV *padlist = CvPADLIST (cv); 354 AV *padlist = CvPADLIST (cv);
211 AV *newpadlist, *newpad; 355 AV *newpadlist, *newpad;
212 356
213 newpadlist = newAV (); 357 newpadlist = newAV ();
214 AvREAL_off (newpadlist); 358 AvREAL_off (newpadlist);
215#if PERL_VERSION_ATLEAST (5,9,0) 359#if PERL_VERSION_ATLEAST (5,10,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else 361#else
218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 362 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif 363#endif
220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 364 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
221 --AvFILLp (padlist); 365 --AvFILLp (padlist);
222 366
223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 367 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
224 av_store (newpadlist, 1, (SV *)newpad); 368 av_store (newpadlist, 1, (SV *)newpad);
225 369
226 return newpadlist; 370 return newpadlist;
227} 371}
228 372
229static void 373static void
230free_padlist (AV *padlist) 374free_padlist (pTHX_ AV *padlist)
231{ 375{
232 /* may be during global destruction */ 376 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 377 if (SvREFCNT (padlist))
234 { 378 {
235 I32 i = AvFILLp (padlist); 379 I32 i = AvFILLp (padlist);
… …
256 AV *padlist; 400 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 401 AV *av = (AV *)mg->mg_obj;
258 402
259 /* casting is fun. */ 403 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 404 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 405 free_padlist (aTHX_ padlist);
262 406
263 SvREFCNT_dec (av); 407 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
264 408
265 return 0; 409 return 0;
266} 410}
267 411
412#define CORO_MAGIC_type_cv 26
268#define PERL_MAGIC_coro PERL_MAGIC_ext 413#define CORO_MAGIC_type_state PERL_MAGIC_ext
269 414
270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 415static MGVTBL coro_cv_vtbl = {
416 0, 0, 0, 0,
417 coro_cv_free
418};
271 419
272#define CORO_MAGIC(cv) \ 420#define CORO_MAGIC_NN(sv, type) \
421 (expect_true (SvMAGIC (sv)->mg_type == type) \
273 SvMAGIC (cv) \ 422 ? SvMAGIC (sv) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 423 : mg_find (sv, type))
275 ? SvMAGIC (cv) \ 424
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 425#define CORO_MAGIC(sv, type) \
426 (expect_true (SvMAGIC (sv)) \
427 ? CORO_MAGIC_NN (sv, type) \
277 : 0 428 : 0)
429
430#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
431#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
432
433INLINE struct coro *
434SvSTATE_ (pTHX_ SV *coro)
435{
436 HV *stash;
437 MAGIC *mg;
438
439 if (SvROK (coro))
440 coro = SvRV (coro);
441
442 if (expect_false (SvTYPE (coro) != SVt_PVHV))
443 croak ("Coro::State object required");
444
445 stash = SvSTASH (coro);
446 if (expect_false (stash != coro_stash && stash != coro_state_stash))
447 {
448 /* very slow, but rare, check */
449 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
450 croak ("Coro::State object required");
451 }
452
453 mg = CORO_MAGIC_state (coro);
454 return (struct coro *)mg->mg_ptr;
455}
456
457#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
458
459/* faster than SvSTATE, but expects a coroutine hv */
460#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
461#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
278 462
279/* the next two functions merely cache the padlists */ 463/* the next two functions merely cache the padlists */
280static void 464static void
281get_padlist (CV *cv) 465get_padlist (pTHX_ CV *cv)
282{ 466{
283 MAGIC *mg = CORO_MAGIC (cv); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
284 AV *av; 468 AV *av;
285 469
286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 470 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 471 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288 else 472 else
289 { 473 {
290#if PREFER_PERL_FUNCTIONS 474#if CORO_PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */ 475 /* this is probably cleaner? but also slower! */
476 /* in practise, it seems to be less stable */
292 CV *cp = Perl_cv_clone (cv); 477 CV *cp = Perl_cv_clone (aTHX_ cv);
293 CvPADLIST (cv) = CvPADLIST (cp); 478 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0; 479 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp); 480 SvREFCNT_dec (cp);
296#else 481#else
297 CvPADLIST (cv) = coro_clone_padlist (cv); 482 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
298#endif 483#endif
299 } 484 }
300} 485}
301 486
302static void 487static void
303put_padlist (CV *cv) 488put_padlist (pTHX_ CV *cv)
304{ 489{
305 MAGIC *mg = CORO_MAGIC (cv); 490 MAGIC *mg = CORO_MAGIC_cv (cv);
306 AV *av; 491 AV *av;
307 492
308 if (!mg) 493 if (expect_false (!mg))
309 { 494 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312 mg->mg_virtual = &vtbl_coro;
313 mg->mg_obj = (SV *)newAV ();
314 }
315 495
316 av = (AV *)mg->mg_obj; 496 av = (AV *)mg->mg_obj;
317 497
318 if (AvFILLp (av) >= AvMAX (av)) 498 if (expect_false (AvFILLp (av) >= AvMAX (av)))
319 av_extend (av, AvMAX (av) + 1); 499 av_extend (av, AvMAX (av) + 1);
320 500
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 501 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322} 502}
323 503
324/** load & save, init *******************************************************/ 504/** load & save, init *******************************************************/
325 505
326#define SB do {
327#define SE } while (0)
328
329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330
331static void 506static void
332load_perl (Coro__State c) 507load_perl (pTHX_ Coro__State c)
333{ 508{
509 perl_slots *slot = c->slot;
510 c->slot = 0;
511
512 PL_mainstack = c->mainstack;
513
514 GvSV (PL_defgv) = slot->defsv;
515 GvAV (PL_defgv) = slot->defav;
516 GvSV (PL_errgv) = slot->errsv;
517 GvSV (irsgv) = slot->irsgv;
518
334#define VAR(name,type) PL_ ## name = c->name; 519 #define VAR(name,type) PL_ ## name = slot->name;
335# include "state.h" 520 # include "state.h"
336#undef VAR 521 #undef VAR
337
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
352 522
353 { 523 {
354 dSP; 524 dSP;
525
355 CV *cv; 526 CV *cv;
356 527
357 /* now do the ugly restore mess */ 528 /* now do the ugly restore mess */
358 while ((cv = (CV *)POPs)) 529 while (expect_true (cv = (CV *)POPs))
359 { 530 {
360 put_padlist (cv); /* mark this padlist as available */ 531 put_padlist (aTHX_ cv); /* mark this padlist as available */
361 CvDEPTH (cv) = PTR2IV (POPs); 532 CvDEPTH (cv) = PTR2IV (POPs);
362 CvPADLIST (cv) = (AV *)POPs; 533 CvPADLIST (cv) = (AV *)POPs;
363 } 534 }
364 535
365 PUTBACK; 536 PUTBACK;
366 } 537 }
367}
368 538
539 slf_frame = c->slf_frame;
540 CORO_THROW = c->except;
541}
542
369static void 543static void
370save_perl (Coro__State c) 544save_perl (pTHX_ Coro__State c)
371{ 545{
546 c->except = CORO_THROW;
547 c->slf_frame = slf_frame;
548
372 { 549 {
373 dSP; 550 dSP;
374 I32 cxix = cxstack_ix; 551 I32 cxix = cxstack_ix;
375 PERL_CONTEXT *ccstk = cxstack; 552 PERL_CONTEXT *ccstk = cxstack;
376 PERL_SI *top_si = PL_curstackinfo; 553 PERL_SI *top_si = PL_curstackinfo;
… …
378 /* 555 /*
379 * the worst thing you can imagine happens first - we have to save 556 * the worst thing you can imagine happens first - we have to save
380 * (and reinitialize) all cv's in the whole callchain :( 557 * (and reinitialize) all cv's in the whole callchain :(
381 */ 558 */
382 559
383 EXTEND (SP, 3 + 1);
384 PUSHs (Nullsv); 560 XPUSHs (Nullsv);
385 /* this loop was inspired by pp_caller */ 561 /* this loop was inspired by pp_caller */
386 for (;;) 562 for (;;)
387 { 563 {
388 while (cxix >= 0) 564 while (expect_true (cxix >= 0))
389 { 565 {
390 PERL_CONTEXT *cx = &ccstk[cxix--]; 566 PERL_CONTEXT *cx = &ccstk[cxix--];
391 567
392 if (CxTYPE (cx) == CXt_SUB) 568 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
393 { 569 {
394 CV *cv = cx->blk_sub.cv; 570 CV *cv = cx->blk_sub.cv;
395 571
396 if (CvDEPTH (cv)) 572 if (expect_true (CvDEPTH (cv)))
397 { 573 {
398 EXTEND (SP, 3); 574 EXTEND (SP, 3);
399 PUSHs ((SV *)CvPADLIST (cv)); 575 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 576 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
401 PUSHs ((SV *)cv); 577 PUSHs ((SV *)cv);
402 578
403 CvDEPTH (cv) = 0; 579 CvDEPTH (cv) = 0;
404 get_padlist (cv); 580 get_padlist (aTHX_ cv);
405 } 581 }
406 } 582 }
407 } 583 }
408 584
409 if (top_si->si_type == PERLSI_MAIN) 585 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 586 break;
411 587
412 top_si = top_si->si_prev; 588 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 589 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 590 cxix = top_si->si_cxix;
415 } 591 }
416 592
417 PUTBACK; 593 PUTBACK;
418 } 594 }
419 595
420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 596 /* allocate some space on the context stack for our purposes */
421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 597 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 598 if (SLOT_COUNT >= 1) CXINC;
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 599 if (SLOT_COUNT >= 2) CXINC;
600 if (SLOT_COUNT >= 3) CXINC;
601 {
602 int i;
603 for (i = 3; i < SLOT_COUNT; ++i)
604 CXINC;
605 }
606 cxstack_ix -= SLOT_COUNT; /* undo allocation */
424 607
608 c->mainstack = PL_mainstack;
609
610 {
611 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
612
613 slot->defav = GvAV (PL_defgv);
614 slot->defsv = DEFSV;
615 slot->errsv = ERRSV;
616 slot->irsgv = GvSV (irsgv);
617
425#define VAR(name,type)c->name = PL_ ## name; 618 #define VAR(name,type) slot->name = PL_ ## name;
426# include "state.h" 619 # include "state.h"
427#undef VAR 620 #undef VAR
621 }
428} 622}
429 623
430/* 624/*
431 * allocate various perl stacks. This is an exact copy 625 * allocate various perl stacks. This is almost an exact copy
432 * of perl.c:init_stacks, except that it uses less memory 626 * of perl.c:init_stacks, except that it uses less memory
433 * on the (sometimes correct) assumption that coroutines do 627 * on the (sometimes correct) assumption that coroutines do
434 * not usually need a lot of stackspace. 628 * not usually need a lot of stackspace.
435 */ 629 */
436#if PREFER_PERL_FUNCTIONS 630#if CORO_PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks 631# define coro_init_stacks(thx) init_stacks ()
438#else 632#else
439static void 633static void
440coro_init_stacks () 634coro_init_stacks (pTHX)
441{ 635{
442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 636 PL_curstackinfo = new_stackinfo(32, 8);
443 PL_curstackinfo->si_type = PERLSI_MAIN; 637 PL_curstackinfo->si_type = PERLSI_MAIN;
444 PL_curstack = PL_curstackinfo->si_stack; 638 PL_curstack = PL_curstackinfo->si_stack;
445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 639 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446 640
447 PL_stack_base = AvARRAY(PL_curstack); 641 PL_stack_base = AvARRAY(PL_curstack);
448 PL_stack_sp = PL_stack_base; 642 PL_stack_sp = PL_stack_base;
449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 643 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450 644
451 New(50,PL_tmps_stack,128,SV*); 645 New(50,PL_tmps_stack,32,SV*);
452 PL_tmps_floor = -1; 646 PL_tmps_floor = -1;
453 PL_tmps_ix = -1; 647 PL_tmps_ix = -1;
454 PL_tmps_max = 128; 648 PL_tmps_max = 32;
455 649
456 New(54,PL_markstack,32,I32); 650 New(54,PL_markstack,16,I32);
457 PL_markstack_ptr = PL_markstack; 651 PL_markstack_ptr = PL_markstack;
458 PL_markstack_max = PL_markstack + 32; 652 PL_markstack_max = PL_markstack + 16;
459 653
460#ifdef SET_MARK_OFFSET 654#ifdef SET_MARK_OFFSET
461 SET_MARK_OFFSET; 655 SET_MARK_OFFSET;
462#endif 656#endif
463 657
464 New(54,PL_scopestack,32,I32); 658 New(54,PL_scopestack,8,I32);
465 PL_scopestack_ix = 0; 659 PL_scopestack_ix = 0;
466 PL_scopestack_max = 32; 660 PL_scopestack_max = 8;
467 661
468 New(54,PL_savestack,64,ANY); 662 New(54,PL_savestack,24,ANY);
469 PL_savestack_ix = 0; 663 PL_savestack_ix = 0;
470 PL_savestack_max = 64; 664 PL_savestack_max = 24;
471 665
472#if !PERL_VERSION_ATLEAST (5,9,0) 666#if !PERL_VERSION_ATLEAST (5,10,0)
473 New(54,PL_retstack,16,OP*); 667 New(54,PL_retstack,4,OP*);
474 PL_retstack_ix = 0; 668 PL_retstack_ix = 0;
475 PL_retstack_max = 16; 669 PL_retstack_max = 4;
476#endif 670#endif
477} 671}
478#endif 672#endif
479 673
480/* 674/*
481 * destroy the stacks, the callchain etc... 675 * destroy the stacks, the callchain etc...
482 */ 676 */
483static void 677static void
484coro_destroy_stacks () 678coro_destruct_stacks (pTHX)
485{ 679{
486 if (!IN_DESTRUCT)
487 {
488 /* restore all saved variables and stuff */
489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
491
492 /* free all temporaries */
493 FREETMPS;
494 assert (PL_tmps_ix == -1);
495
496 /* unwind all extra stacks */
497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
501 }
502
503 while (PL_curstackinfo->si_next) 680 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 681 PL_curstackinfo = PL_curstackinfo->si_next;
505 682
506 while (PL_curstackinfo) 683 while (PL_curstackinfo)
507 { 684 {
… …
517 694
518 Safefree (PL_tmps_stack); 695 Safefree (PL_tmps_stack);
519 Safefree (PL_markstack); 696 Safefree (PL_markstack);
520 Safefree (PL_scopestack); 697 Safefree (PL_scopestack);
521 Safefree (PL_savestack); 698 Safefree (PL_savestack);
522#if !PERL_VERSION_ATLEAST (5,9,0) 699#if !PERL_VERSION_ATLEAST (5,10,0)
523 Safefree (PL_retstack); 700 Safefree (PL_retstack);
524#endif 701#endif
525} 702}
526 703
704#define CORO_RSS \
705 rss += sizeof (SYM (curstackinfo)); \
706 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
708 rss += SYM (tmps_max) * sizeof (SV *); \
709 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
710 rss += SYM (scopestack_max) * sizeof (I32); \
711 rss += SYM (savestack_max) * sizeof (ANY);
712
713static size_t
714coro_rss (pTHX_ struct coro *coro)
715{
716 size_t rss = sizeof (*coro);
717
718 if (coro->mainstack)
719 {
720 if (coro->flags & CF_RUNNING)
721 {
722 #define SYM(sym) PL_ ## sym
723 CORO_RSS;
724 #undef SYM
725 }
726 else
727 {
728 #define SYM(sym) coro->slot->sym
729 CORO_RSS;
730 #undef SYM
731 }
732 }
733
734 return rss;
735}
736
527/** coroutine stack handling ************************************************/ 737/** coroutine stack handling ************************************************/
528 738
739static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
740static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
741static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
742
743/* apparently < 5.8.8 */
744#ifndef MgPV_nolen_const
745#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
746 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
747 (const char*)(mg)->mg_ptr)
748#endif
749
750/*
751 * This overrides the default magic get method of %SIG elements.
752 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
753 * and instead of tryign to save and restore the hash elements, we just provide
754 * readback here.
755 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
756 * not expecting this to actually change the hook. This is a potential problem
757 * when a schedule happens then, but we ignore this.
758 */
529static void 759static int
530setup_coro (struct coro *coro) 760coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
761{
762 const char *s = MgPV_nolen_const (mg);
763
764 if (*s == '_')
765 {
766 SV **svp = 0;
767
768 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
769 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
770
771 if (svp)
772 {
773 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
774 return 0;
775 }
776 }
777
778 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = 0;
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
803}
804
805static int
806coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
807{
808 const char *s = MgPV_nolen_const (mg);
809
810 if (*s == '_')
811 {
812 SV **svp = 0;
813
814 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
815 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
816
817 if (svp)
818 {
819 SV *old = *svp;
820 *svp = newSVsv (sv);
821 SvREFCNT_dec (old);
822 return 0;
823 }
824 }
825
826 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
827}
828
829static void
830prepare_nop (pTHX_ struct coro_transfer_args *ta)
831{
832 /* kind of mega-hacky, but works */
833 ta->next = ta->prev = (struct coro *)ta;
834}
835
836static int
837slf_check_nop (pTHX_ struct CoroSLF *frame)
838{
839 return 0;
840}
841
842static int
843slf_check_repeat (pTHX_ struct CoroSLF *frame)
844{
845 return 1;
846}
847
848static UNOP coro_setup_op;
849
850static void NOINLINE /* noinline to keep it out of the transfer fast path */
851coro_setup (pTHX_ struct coro *coro)
531{ 852{
532 /* 853 /*
533 * emulate part of the perl startup here. 854 * emulate part of the perl startup here.
534 */ 855 */
535
536 coro_init_stacks (); 856 coro_init_stacks (aTHX);
537 857
858 PL_runops = RUNOPS_DEFAULT;
538 PL_curcop = &PL_compiling; 859 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL; 860 PL_in_eval = EVAL_NULL;
861 PL_comppad = 0;
540 PL_curpm = 0; 862 PL_curpm = 0;
863 PL_curpad = 0;
541 PL_localizing = 0; 864 PL_localizing = 0;
542 PL_dirty = 0; 865 PL_dirty = 0;
543 PL_restartop = 0; 866 PL_restartop = 0;
867#if PERL_VERSION_ATLEAST (5,10,0)
868 PL_parser = 0;
869#endif
870
871 /* recreate the die/warn hooks */
872 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
873 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
874
875 GvSV (PL_defgv) = newSV (0);
876 GvAV (PL_defgv) = coro->args; coro->args = 0;
877 GvSV (PL_errgv) = newSV (0);
878 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
879 PL_rs = newSVsv (GvSV (irsgv));
880 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
544 881
545 { 882 {
546 dSP; 883 dSP;
547 LOGOP myop; 884 UNOP myop;
548 885
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP); 886 Zero (&myop, 1, UNOP);
553 myop.op_next = Nullop; 887 myop.op_next = Nullop;
888 myop.op_type = OP_ENTERSUB;
554 myop.op_flags = OPf_WANT_VOID; 889 myop.op_flags = OPf_WANT_VOID;
555 890
556 PUSHMARK (SP); 891 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 892 PUSHs ((SV *)coro->startcv);
558 PUTBACK; 893 PUTBACK;
559 PL_op = (OP *)&myop; 894 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 895 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN;
562 } 896 }
563 897
564 ENTER; /* necessary e.g. for dounwind */ 898 /* this newly created coroutine might be run on an existing cctx which most
565} 899 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
900 */
901 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
902 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
566 903
904 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
905 coro_setup_op.op_next = PL_op;
906 coro_setup_op.op_type = OP_ENTERSUB;
907 coro_setup_op.op_ppaddr = pp_slf;
908 /* no flags etc. required, as an init function won't be called */
909
910 PL_op = (OP *)&coro_setup_op;
911
912 /* copy throw, in case it was set before coro_setup */
913 CORO_THROW = coro->except;
914}
915
567static void 916static void
917coro_destruct (pTHX_ struct coro *coro)
918{
919 if (!IN_DESTRUCT)
920 {
921 /* restore all saved variables and stuff */
922 LEAVE_SCOPE (0);
923 assert (PL_tmps_floor == -1);
924
925 /* free all temporaries */
926 FREETMPS;
927 assert (PL_tmps_ix == -1);
928
929 /* unwind all extra stacks */
930 POPSTACK_TO (PL_mainstack);
931
932 /* unwind main stack */
933 dounwind (-1);
934 }
935
936 SvREFCNT_dec (GvSV (PL_defgv));
937 SvREFCNT_dec (GvAV (PL_defgv));
938 SvREFCNT_dec (GvSV (PL_errgv));
939 SvREFCNT_dec (PL_defoutgv);
940 SvREFCNT_dec (PL_rs);
941 SvREFCNT_dec (GvSV (irsgv));
942
943 SvREFCNT_dec (PL_diehook);
944 SvREFCNT_dec (PL_warnhook);
945
946 SvREFCNT_dec (coro->saved_deffh);
947 SvREFCNT_dec (coro->rouse_cb);
948 SvREFCNT_dec (coro->invoke_cb);
949 SvREFCNT_dec (coro->invoke_av);
950
951 coro_destruct_stacks (aTHX);
952}
953
954INLINE void
568free_coro_mortal () 955free_coro_mortal (pTHX)
569{ 956{
570 if (coro_mortal) 957 if (expect_true (coro_mortal))
571 { 958 {
572 SvREFCNT_dec (coro_mortal); 959 SvREFCNT_dec (coro_mortal);
573 coro_mortal = 0; 960 coro_mortal = 0;
574 } 961 }
575} 962}
576 963
577/* inject a fake call to Coro::State::_cctx_init into the execution */ 964static int
965runops_trace (pTHX)
966{
967 COP *oldcop = 0;
968 int oldcxix = -2;
969 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
970 coro_cctx *cctx = coro->cctx;
971
972 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
973 {
974 PERL_ASYNC_CHECK ();
975
976 if (cctx->flags & CC_TRACE_ALL)
977 {
978 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
979 {
980 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
981 SV **bot, **top;
982 AV *av = newAV (); /* return values */
983 SV **cb;
984 dSP;
985
986 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0));
988 if (isGV (gv))
989 gv_efullname3 (fullname, gv, 0);
990
991 bot = PL_stack_base + cx->blk_oldsp + 1;
992 top = cx->blk_gimme == G_ARRAY ? SP + 1
993 : cx->blk_gimme == G_SCALAR ? bot + 1
994 : bot;
995
996 av_extend (av, top - bot);
997 while (bot < top)
998 av_push (av, SvREFCNT_inc_NN (*bot++));
999
1000 PL_runops = RUNOPS_DEFAULT;
1001 ENTER;
1002 SAVETMPS;
1003 EXTEND (SP, 3);
1004 PUSHMARK (SP);
1005 PUSHs (&PL_sv_no);
1006 PUSHs (fullname);
1007 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1008 PUTBACK;
1009 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1010 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1011 SPAGAIN;
1012 FREETMPS;
1013 LEAVE;
1014 PL_runops = runops_trace;
1015 }
1016
1017 if (oldcop != PL_curcop)
1018 {
1019 oldcop = PL_curcop;
1020
1021 if (PL_curcop != &PL_compiling)
1022 {
1023 SV **cb;
1024
1025 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1026 {
1027 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1028
1029 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1030 {
1031 dSP;
1032 GV *gv = CvGV (cx->blk_sub.cv);
1033 SV *fullname = sv_2mortal (newSV (0));
1034
1035 if (isGV (gv))
1036 gv_efullname3 (fullname, gv, 0);
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PUSHMARK (SP);
1043 PUSHs (&PL_sv_yes);
1044 PUSHs (fullname);
1045 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054
1055 oldcxix = cxstack_ix;
1056 }
1057
1058 if (cctx->flags & CC_TRACE_LINE)
1059 {
1060 dSP;
1061
1062 PL_runops = RUNOPS_DEFAULT;
1063 ENTER;
1064 SAVETMPS;
1065 EXTEND (SP, 3);
1066 PL_runops = RUNOPS_DEFAULT;
1067 PUSHMARK (SP);
1068 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1069 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1070 PUTBACK;
1071 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1072 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1073 SPAGAIN;
1074 FREETMPS;
1075 LEAVE;
1076 PL_runops = runops_trace;
1077 }
1078 }
1079 }
1080 }
1081 }
1082
1083 TAINT_NOT;
1084 return 0;
1085}
1086
1087static struct coro_cctx *cctx_ssl_cctx;
1088static struct CoroSLF cctx_ssl_frame;
1089
1090static void
1091slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1092{
1093 ta->prev = (struct coro *)cctx_ssl_cctx;
1094 ta->next = 0;
1095}
1096
1097static int
1098slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1099{
1100 *frame = cctx_ssl_frame;
1101
1102 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1103}
1104
1105/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
578static void NOINLINE 1106static void NOINLINE
579prepare_cctx (coro_cctx *cctx) 1107cctx_prepare (pTHX_ coro_cctx *cctx)
580{ 1108{
581 dSP;
582 LOGOP myop;
583
584 Zero (&myop, 1, LOGOP);
585 myop.op_next = PL_op;
586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
587
588 PUSHMARK (SP);
589 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK;
593 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595 SPAGAIN;
596}
597
598static void
599coro_run (void *arg)
600{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK;
603
604 /*
605 * this is a _very_ stripped down perl interpreter ;)
606 */
607 PL_top_env = &PL_start_env; 1109 PL_top_env = &PL_start_env;
608 1110
1111 if (cctx->flags & CC_TRACE)
1112 PL_runops = runops_trace;
1113
1114 /* we already must be executing an SLF op, there is no other valid way
1115 * that can lead to creation of a new cctx */
1116 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1117 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1118
1119 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1120 cctx_ssl_cctx = cctx;
1121 cctx_ssl_frame = slf_frame;
1122
1123 slf_frame.prepare = slf_prepare_set_stacklevel;
1124 slf_frame.check = slf_check_set_stacklevel;
1125}
1126
1127/* the tail of transfer: execute stuff we can only do after a transfer */
1128INLINE void
1129transfer_tail (pTHX)
1130{
1131 free_coro_mortal (aTHX);
1132}
1133
1134/*
1135 * this is a _very_ stripped down perl interpreter ;)
1136 */
1137static void
1138cctx_run (void *arg)
1139{
1140#ifdef USE_ITHREADS
1141# if CORO_PTHREAD
1142 PERL_SET_CONTEXT (coro_thx);
1143# endif
1144#endif
1145 {
1146 dTHX;
1147
1148 /* normally we would need to skip the entersub here */
1149 /* not doing so will re-execute it, which is exactly what we want */
1150 /* PL_nop = PL_nop->op_next */
1151
609 /* inject call to cctx_init */ 1152 /* inject a fake subroutine call to cctx_init */
610 prepare_cctx ((coro_cctx *)arg); 1153 cctx_prepare (aTHX_ (coro_cctx *)arg);
611 1154
1155 /* cctx_run is the alternative tail of transfer() */
1156 transfer_tail (aTHX);
1157
612 /* somebody will hit me for both perl_run and PL_restartop */ 1158 /* somebody or something will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op; 1159 PL_restartop = PL_op;
614 perl_run (PL_curinterp); 1160 perl_run (PL_curinterp);
1161 /*
1162 * Unfortunately, there is no way to get at the return values of the
1163 * coro body here, as perl_run destroys these
1164 */
615 1165
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1166 /*
617 abort (); 1167 * If perl-run returns we assume exit() was being called or the coro
1168 * fell off the end, which seems to be the only valid (non-bug)
1169 * reason for perl_run to return. We try to exit by jumping to the
1170 * bootstrap-time "top" top_env, as we cannot restore the "main"
1171 * coroutine as Coro has no such concept
1172 */
1173 PL_top_env = main_top_env;
1174 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1175 }
618} 1176}
619 1177
620static coro_cctx * 1178static coro_cctx *
621cctx_new () 1179cctx_new ()
622{ 1180{
623 coro_cctx *cctx; 1181 coro_cctx *cctx;
624 1182
625 ++cctx_count; 1183 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx); 1184 New (0, cctx, 1, coro_cctx);
1185
1186 cctx->gen = cctx_gen;
1187 cctx->flags = 0;
1188 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx only suitable as source */
1194static coro_cctx *
1195cctx_new_empty ()
1196{
1197 coro_cctx *cctx = cctx_new ();
1198
1199 cctx->sptr = 0;
1200 coro_create (&cctx->cctx, 0, 0, 0, 0);
1201
1202 return cctx;
1203}
1204
1205/* create a new cctx suitable as destination/running a perl interpreter */
1206static coro_cctx *
1207cctx_new_run ()
1208{
1209 coro_cctx *cctx = cctx_new ();
1210 void *stack_start;
1211 size_t stack_size;
628 1212
629#if HAVE_MMAP 1213#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1214 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */ 1215 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1216 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634 1217
635 if (cctx->sptr == (void *)-1) 1218 if (cctx->sptr != (void *)-1)
636 {
637 perror ("FATAL: unable to mmap stack for coroutine");
638 _exit (EXIT_FAILURE);
639 } 1219 {
640 1220 #if CORO_STACKGUARD
641# if STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1221 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
643# endif 1222 #endif
644 1223 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
645#else 1224 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
646 1225 cctx->flags |= CC_MAPPED;
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 { 1226 }
652 perror ("FATAL: unable to malloc stack for coroutine"); 1227 else
653 _exit (EXIT_FAILURE);
654 }
655
656#endif 1228#endif
1229 {
1230 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1231 New (0, cctx->sptr, cctx_stacksize, long);
657 1232
1233 if (!cctx->sptr)
1234 {
1235 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1236 _exit (EXIT_FAILURE);
1237 }
1238
1239 stack_start = cctx->sptr;
1240 stack_size = cctx->ssize;
1241 }
1242
658#if USE_VALGRIND 1243 #if CORO_USE_VALGRIND
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1244 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif 1245 #endif
664 1246
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1247 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
666 1248
667 return cctx; 1249 return cctx;
668} 1250}
669 1251
670static void 1252static void
… …
672{ 1254{
673 if (!cctx) 1255 if (!cctx)
674 return; 1256 return;
675 1257
676 --cctx_count; 1258 --cctx_count;
1259 coro_destroy (&cctx->cctx);
677 1260
678#if USE_VALGRIND 1261 /* coro_transfer creates new, empty cctx's */
1262 if (cctx->sptr)
1263 {
1264 #if CORO_USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1265 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1266 #endif
1267
1268#if HAVE_MMAP
1269 if (cctx->flags & CC_MAPPED)
1270 munmap (cctx->sptr, cctx->ssize);
1271 else
680#endif 1272#endif
681
682#if HAVE_MMAP
683 munmap (cctx->sptr, cctx->ssize);
684#else
685 Safefree (cctx->sptr); 1273 Safefree (cctx->sptr);
686#endif 1274 }
687 1275
688 Safefree (cctx); 1276 Safefree (cctx);
689} 1277}
690 1278
1279/* wether this cctx should be destructed */
1280#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1281
691static coro_cctx * 1282static coro_cctx *
692cctx_get () 1283cctx_get (pTHX)
693{ 1284{
694 coro_cctx *cctx; 1285 while (expect_true (cctx_first))
695
696 if (cctx_first)
697 { 1286 {
698 cctx = cctx_first; 1287 coro_cctx *cctx = cctx_first;
699 cctx_first = cctx->next; 1288 cctx_first = cctx->next;
700 --cctx_idle; 1289 --cctx_idle;
701 } 1290
702 else 1291 if (expect_true (!CCTX_EXPIRED (cctx)))
703 { 1292 return cctx;
704 cctx = cctx_new (); 1293
705 PL_op = PL_op->op_next; 1294 cctx_destroy (cctx);
706 } 1295 }
707 1296
708 return cctx; 1297 return cctx_new_run ();
709} 1298}
710 1299
711static void 1300static void
712cctx_put (coro_cctx *cctx) 1301cctx_put (coro_cctx *cctx)
713{ 1302{
1303 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1304
714 /* free another cctx if overlimit */ 1305 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX) 1306 if (expect_false (cctx_idle >= cctx_max_idle))
716 { 1307 {
717 coro_cctx *first = cctx_first; 1308 coro_cctx *first = cctx_first;
718 cctx_first = first->next; 1309 cctx_first = first->next;
719 --cctx_idle; 1310 --cctx_idle;
720 1311
721 assert (!first->inuse);
722 cctx_destroy (first); 1312 cctx_destroy (first);
723 } 1313 }
724 1314
725 ++cctx_idle; 1315 ++cctx_idle;
726 cctx->next = cctx_first; 1316 cctx->next = cctx_first;
727 cctx_first = cctx; 1317 cctx_first = cctx;
728} 1318}
729 1319
730/** coroutine switching *****************************************************/ 1320/** coroutine switching *****************************************************/
731 1321
732/* never call directly, always through the coro_state_transfer global variable */ 1322static void
733static void NOINLINE
734transfer (struct coro *prev, struct coro *next) 1323transfer_check (pTHX_ struct coro *prev, struct coro *next)
1324{
1325 /* TODO: throwing up here is considered harmful */
1326
1327 if (expect_true (prev != next))
1328 {
1329 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1330 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1331
1332 if (expect_false (next->flags & CF_RUNNING))
1333 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1334
1335 if (expect_false (next->flags & CF_DESTROYED))
1336 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1337
1338#if !PERL_VERSION_ATLEAST (5,10,0)
1339 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1340 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1341#endif
1342 }
1343}
1344
1345/* always use the TRANSFER macro */
1346static void NOINLINE /* noinline so we have a fixed stackframe */
1347transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
735{ 1348{
736 dSTACKLEVEL; 1349 dSTACKLEVEL;
737 1350
738 /* sometimes transfer is only called to set idle_sp */ 1351 /* sometimes transfer is only called to set idle_sp */
739 if (!next) 1352 if (expect_false (!next))
740 { 1353 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1354 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1355 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 } 1356 }
744 else if (prev != next) 1357 else if (expect_true (prev != next))
745 { 1358 {
746 coro_cctx *prev__cctx; 1359 coro_cctx *prev__cctx;
747 1360
748 if (prev->flags & CF_NEW) 1361 if (expect_false (prev->flags & CF_NEW))
749 { 1362 {
750 /* create a new empty context */ 1363 /* create a new empty/source context */
751 Newz (0, prev->cctx, 1, coro_cctx); 1364 prev->cctx = cctx_new_empty ();
752 prev->cctx->inuse = 1;
753 prev->flags &= ~CF_NEW; 1365 prev->flags &= ~CF_NEW;
754 prev->flags |= CF_RUNNING; 1366 prev->flags |= CF_RUNNING;
755 } 1367 }
756 1368
757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING; 1369 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING; 1370 next->flags |= CF_RUNNING;
769 1371
770 LOCK; 1372 /* first get rid of the old state */
1373 save_perl (aTHX_ prev);
771 1374
772 if (next->flags & CF_NEW) 1375 if (expect_false (next->flags & CF_NEW))
773 { 1376 {
774 /* need to start coroutine */ 1377 /* need to start coroutine */
775 next->flags &= ~CF_NEW; 1378 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */ 1379 /* setup coroutine call */
779 setup_coro (next); 1380 coro_setup (aTHX_ next);
780 /* need a new stack */
781 assert (!next->cctx);
782 } 1381 }
783 else 1382 else
1383 load_perl (aTHX_ next);
1384
1385 prev__cctx = prev->cctx;
1386
1387 /* possibly untie and reuse the cctx */
1388 if (expect_true (
1389 prev__cctx->idle_sp == STACKLEVEL
1390 && !(prev__cctx->flags & CC_TRACE)
1391 && !force_cctx
1392 ))
784 { 1393 {
785 /* coroutine already started */ 1394 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
786 save_perl (prev); 1395 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
787 load_perl (next); 1396
1397 prev->cctx = 0;
1398
1399 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1400 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1401 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1402 if (!next->cctx)
1403 next->cctx = cctx_get (aTHX);
1404
1405 cctx_put (prev__cctx);
788 } 1406 }
789 1407
790 prev__cctx = prev->cctx; 1408 ++next->usecount;
791 1409
792 /* possibly "free" the cctx */
793 if (prev__cctx->idle_sp == STACKLEVEL)
794 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 }
803
804 if (!next->cctx) 1410 if (expect_true (!next->cctx))
805 {
806 next->cctx = cctx_get (); 1411 next->cctx = cctx_get (aTHX);
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810 1412
811 if (prev__cctx != next->cctx) 1413 if (expect_false (prev__cctx != next->cctx))
812 { 1414 {
813 prev__cctx->top_env = PL_top_env; 1415 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env; 1416 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1417 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 } 1418 }
817 1419
818 free_coro_mortal (); 1420 transfer_tail (aTHX);
819 UNLOCK;
820 } 1421 }
821} 1422}
822 1423
823struct transfer_args 1424#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
824{
825 struct coro *prev, *next;
826};
827
828#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1425#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829 1426
830/** high level stuff ********************************************************/ 1427/** high level stuff ********************************************************/
831 1428
832static int 1429static int
833coro_state_destroy (struct coro *coro) 1430coro_state_destroy (pTHX_ struct coro *coro)
834{ 1431{
835 if (coro->flags & CF_DESTROYED) 1432 if (coro->flags & CF_DESTROYED)
836 return 0; 1433 return 0;
1434
1435 if (coro->on_destroy)
1436 coro->on_destroy (aTHX_ coro);
837 1437
838 coro->flags |= CF_DESTROYED; 1438 coro->flags |= CF_DESTROYED;
839 1439
840 if (coro->flags & CF_READY) 1440 if (coro->flags & CF_READY)
841 { 1441 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1442 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove it */ 1443 /* alternative: look through all ready queues and remove the coro */
844 LOCK;
845 --coro_nready; 1444 --coro_nready;
846 UNLOCK;
847 } 1445 }
848 else 1446 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1447 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850 1448
851 if (coro->mainstack && coro->mainstack != main_mainstack) 1449 if (coro->mainstack && coro->mainstack != main_mainstack)
852 { 1450 {
853 assert (!(coro->flags & CF_RUNNING));
854
855 struct coro temp; 1451 struct coro temp;
856 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL;
858 1452
859 if (coro->flags & CF_RUNNING) 1453 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
860 croak ("FATAL: tried to destroy currently running coroutine");
861 1454
862 save_perl (&temp); 1455 save_perl (aTHX_ &temp);
863 load_perl (coro); 1456 load_perl (aTHX_ coro);
864 1457
865 coro_destroy_stacks (); 1458 coro_destruct (aTHX_ coro);
866 1459
867 load_perl (&temp); /* this will get rid of defsv etc.. */ 1460 load_perl (aTHX_ &temp);
868 1461
869 coro->mainstack = 0; 1462 coro->slot = 0;
870 } 1463 }
871 1464
872 cctx_destroy (coro->cctx); 1465 cctx_destroy (coro->cctx);
1466 SvREFCNT_dec (coro->startcv);
873 SvREFCNT_dec (coro->args); 1467 SvREFCNT_dec (coro->args);
1468 SvREFCNT_dec (CORO_THROW);
1469
1470 if (coro->next) coro->next->prev = coro->prev;
1471 if (coro->prev) coro->prev->next = coro->next;
1472 if (coro == coro_first) coro_first = coro->next;
874 1473
875 return 1; 1474 return 1;
876} 1475}
877 1476
878static int 1477static int
879coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1478coro_state_free (pTHX_ SV *sv, MAGIC *mg)
880{ 1479{
881 struct coro *coro = (struct coro *)mg->mg_ptr; 1480 struct coro *coro = (struct coro *)mg->mg_ptr;
882 mg->mg_ptr = 0; 1481 mg->mg_ptr = 0;
883 1482
1483 coro->hv = 0;
1484
884 if (--coro->refcnt < 0) 1485 if (--coro->refcnt < 0)
885 { 1486 {
886 coro_state_destroy (coro); 1487 coro_state_destroy (aTHX_ coro);
887 Safefree (coro); 1488 Safefree (coro);
888 } 1489 }
889 1490
890 return 0; 1491 return 0;
891} 1492}
… …
909#else 1510#else
910# define MGf_DUP 0 1511# define MGf_DUP 0
911#endif 1512#endif
912}; 1513};
913 1514
914static struct coro *
915SvSTATE (SV *coro)
916{
917 HV *stash;
918 MAGIC *mg;
919
920 if (SvROK (coro))
921 coro = SvRV (coro);
922
923 stash = SvSTASH (coro);
924 if (stash != coro_stash && stash != coro_state_stash)
925 {
926 /* very slow, but rare, check */
927 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928 croak ("Coro::State object required");
929 }
930
931 mg = SvMAGIC (coro);
932 assert (mg->mg_type == PERL_MAGIC_ext);
933 return (struct coro *)mg->mg_ptr;
934}
935
936static void 1515static void
937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1516prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
938{ 1517{
939 ta->prev = SvSTATE (prev_sv); 1518 ta->prev = SvSTATE (prev_sv);
940 ta->next = SvSTATE (next_sv); 1519 ta->next = SvSTATE (next_sv);
1520 TRANSFER_CHECK (*ta);
941} 1521}
942 1522
943static void 1523static void
944api_transfer (SV *prev_sv, SV *next_sv) 1524api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
945{ 1525{
946 struct transfer_args ta; 1526 struct coro_transfer_args ta;
947 1527
948 prepare_transfer (&ta, prev_sv, next_sv); 1528 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
949 TRANSFER (ta); 1529 TRANSFER (ta, 1);
950} 1530}
951 1531
952static int 1532/*****************************************************************************/
953api_save (SV *coro_sv, int new_save) 1533/* gensub: simple closure generation utility */
954{
955 struct coro *coro = SvSTATE (coro_sv);
956 int old_save = coro->save;
957 1534
958 if (new_save >= 0) 1535#define GENSUB_ARG CvXSUBANY (cv).any_ptr
959 coro->save = new_save;
960 1536
961 return old_save; 1537/* create a closure from XS, returns a code reference */
1538/* the arg can be accessed via GENSUB_ARG from the callback */
1539/* the callback must use dXSARGS/XSRETURN */
1540static SV *
1541gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1542{
1543 CV *cv = (CV *)newSV (0);
1544
1545 sv_upgrade ((SV *)cv, SVt_PVCV);
1546
1547 CvANON_on (cv);
1548 CvISXSUB_on (cv);
1549 CvXSUB (cv) = xsub;
1550 GENSUB_ARG = arg;
1551
1552 return newRV_noinc ((SV *)cv);
962} 1553}
963 1554
964/** Coro ********************************************************************/ 1555/** Coro ********************************************************************/
965 1556
966static void 1557INLINE void
967coro_enq (SV *coro_sv) 1558coro_enq (pTHX_ struct coro *coro)
968{ 1559{
969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1560 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
970} 1561}
971 1562
972static SV * 1563INLINE SV *
973coro_deq (int min_prio) 1564coro_deq (pTHX)
974{ 1565{
975 int prio = PRIO_MAX - PRIO_MIN; 1566 int prio;
976 1567
977 min_prio -= PRIO_MIN;
978 if (min_prio < 0)
979 min_prio = 0;
980
981 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1568 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
982 if (AvFILLp (coro_ready [prio]) >= 0) 1569 if (AvFILLp (coro_ready [prio]) >= 0)
983 return av_shift (coro_ready [prio]); 1570 return av_shift (coro_ready [prio]);
984 1571
985 return 0; 1572 return 0;
986} 1573}
987 1574
988static int 1575static int
989api_ready (SV *coro_sv) 1576api_ready (pTHX_ SV *coro_sv)
990{ 1577{
991 struct coro *coro; 1578 struct coro *coro;
1579 SV *sv_hook;
1580 void (*xs_hook)(void);
992 1581
993 if (SvROK (coro_sv)) 1582 if (SvROK (coro_sv))
994 coro_sv = SvRV (coro_sv); 1583 coro_sv = SvRV (coro_sv);
995 1584
996 coro = SvSTATE (coro_sv); 1585 coro = SvSTATE (coro_sv);
… …
998 if (coro->flags & CF_READY) 1587 if (coro->flags & CF_READY)
999 return 0; 1588 return 0;
1000 1589
1001 coro->flags |= CF_READY; 1590 coro->flags |= CF_READY;
1002 1591
1003 LOCK; 1592 sv_hook = coro_nready ? 0 : coro_readyhook;
1004 coro_enq (SvREFCNT_inc (coro_sv)); 1593 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1594
1595 coro_enq (aTHX_ coro);
1005 ++coro_nready; 1596 ++coro_nready;
1006 UNLOCK; 1597
1598 if (sv_hook)
1599 {
1600 dSP;
1601
1602 ENTER;
1603 SAVETMPS;
1604
1605 PUSHMARK (SP);
1606 PUTBACK;
1607 call_sv (sv_hook, G_VOID | G_DISCARD);
1608
1609 FREETMPS;
1610 LEAVE;
1611 }
1612
1613 if (xs_hook)
1614 xs_hook ();
1007 1615
1008 return 1; 1616 return 1;
1009} 1617}
1010 1618
1011static int 1619static int
1012api_is_ready (SV *coro_sv) 1620api_is_ready (pTHX_ SV *coro_sv)
1013{ 1621{
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1622 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015} 1623}
1016 1624
1625/* expects to own a reference to next->hv */
1626INLINE void
1627prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1628{
1629 SV *prev_sv = SvRV (coro_current);
1630
1631 ta->prev = SvSTATE_hv (prev_sv);
1632 ta->next = next;
1633
1634 TRANSFER_CHECK (*ta);
1635
1636 SvRV_set (coro_current, (SV *)next->hv);
1637
1638 free_coro_mortal (aTHX);
1639 coro_mortal = prev_sv;
1640}
1641
1017static void 1642static void
1018prepare_schedule (struct transfer_args *ta) 1643prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1019{ 1644{
1020 SV *prev_sv, *next_sv;
1021
1022 for (;;) 1645 for (;;)
1023 { 1646 {
1024 LOCK;
1025 next_sv = coro_deq (PRIO_MIN); 1647 SV *next_sv = coro_deq (aTHX);
1026 1648
1027 /* nothing to schedule: call the idle handler */ 1649 if (expect_true (next_sv))
1028 if (!next_sv)
1029 { 1650 {
1030 UNLOCK; 1651 struct coro *next = SvSTATE_hv (next_sv);
1652
1653 /* cannot transfer to destroyed coros, skip and look for next */
1654 if (expect_false (next->flags & CF_DESTROYED))
1655 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1656 else
1657 {
1658 next->flags &= ~CF_READY;
1659 --coro_nready;
1660
1661 prepare_schedule_to (aTHX_ ta, next);
1662 break;
1663 }
1664 }
1665 else
1666 {
1667 /* nothing to schedule: call the idle handler */
1031 dSP; 1668 dSP;
1032 1669
1033 ENTER; 1670 ENTER;
1034 SAVETMPS; 1671 SAVETMPS;
1035 1672
1036 PUSHMARK (SP); 1673 PUSHMARK (SP);
1037 PUTBACK; 1674 PUTBACK;
1038 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1675 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1039 1676
1040 FREETMPS; 1677 FREETMPS;
1041 LEAVE; 1678 LEAVE;
1042 continue;
1043 } 1679 }
1044
1045 ta->next = SvSTATE (next_sv);
1046
1047 /* cannot transfer to destroyed coros, skip and look for next */
1048 if (ta->next->flags & CF_DESTROYED)
1049 {
1050 UNLOCK;
1051 SvREFCNT_dec (next_sv);
1052 /* coro_nready is already taken care of by destroy */
1053 continue;
1054 }
1055
1056 --coro_nready;
1057 UNLOCK;
1058 break;
1059 } 1680 }
1060
1061 /* free this only after the transfer */
1062 prev_sv = SvRV (coro_current);
1063 SvRV_set (coro_current, next_sv);
1064 ta->prev = SvSTATE (prev_sv);
1065
1066 assert (ta->next->flags & CF_READY);
1067 ta->next->flags &= ~CF_READY;
1068
1069 LOCK;
1070 free_coro_mortal ();
1071 coro_mortal = prev_sv;
1072 UNLOCK;
1073} 1681}
1074 1682
1075static void 1683INLINE void
1076prepare_cede (struct transfer_args *ta) 1684prepare_cede (pTHX_ struct coro_transfer_args *ta)
1077{ 1685{
1078 api_ready (coro_current); 1686 api_ready (aTHX_ coro_current);
1079 prepare_schedule (ta); 1687 prepare_schedule (aTHX_ ta);
1688}
1689
1690INLINE void
1691prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1692{
1693 SV *prev = SvRV (coro_current);
1694
1695 if (coro_nready)
1696 {
1697 prepare_schedule (aTHX_ ta);
1698 api_ready (aTHX_ prev);
1699 }
1700 else
1701 prepare_nop (aTHX_ ta);
1702}
1703
1704static void
1705api_schedule (pTHX)
1706{
1707 struct coro_transfer_args ta;
1708
1709 prepare_schedule (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711}
1712
1713static void
1714api_schedule_to (pTHX_ SV *coro_sv)
1715{
1716 struct coro_transfer_args ta;
1717 struct coro *next = SvSTATE (coro_sv);
1718
1719 SvREFCNT_inc_NN (coro_sv);
1720 prepare_schedule_to (aTHX_ &ta, next);
1080} 1721}
1081 1722
1082static int 1723static int
1083prepare_cede_notself (struct transfer_args *ta) 1724api_cede (pTHX)
1084{ 1725{
1085 if (coro_nready) 1726 struct coro_transfer_args ta;
1727
1728 prepare_cede (aTHX_ &ta);
1729
1730 if (expect_true (ta.prev != ta.next))
1086 { 1731 {
1087 SV *prev = SvRV (coro_current); 1732 TRANSFER (ta, 1);
1088 prepare_schedule (ta);
1089 api_ready (prev);
1090 return 1; 1733 return 1;
1091 } 1734 }
1092 else 1735 else
1093 return 0; 1736 return 0;
1094} 1737}
1095 1738
1096static void
1097api_schedule (void)
1098{
1099 struct transfer_args ta;
1100
1101 prepare_schedule (&ta);
1102 TRANSFER (ta);
1103}
1104
1105static int 1739static int
1106api_cede (void) 1740api_cede_notself (pTHX)
1107{ 1741{
1742 if (coro_nready)
1743 {
1108 struct transfer_args ta; 1744 struct coro_transfer_args ta;
1109 1745
1110 prepare_cede (&ta); 1746 prepare_cede_notself (aTHX_ &ta);
1111
1112 if (ta.prev != ta.next)
1113 {
1114 TRANSFER (ta); 1747 TRANSFER (ta, 1);
1115 return 1; 1748 return 1;
1116 } 1749 }
1117 else 1750 else
1118 return 0; 1751 return 0;
1119} 1752}
1120 1753
1754static void
1755api_trace (pTHX_ SV *coro_sv, int flags)
1756{
1757 struct coro *coro = SvSTATE (coro_sv);
1758
1759 if (flags & CC_TRACE)
1760 {
1761 if (!coro->cctx)
1762 coro->cctx = cctx_new_run ();
1763 else if (!(coro->cctx->flags & CC_TRACE))
1764 croak ("cannot enable tracing on coroutine with custom stack,");
1765
1766 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1767 }
1768 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1769 {
1770 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1771
1772 if (coro->flags & CF_RUNNING)
1773 PL_runops = RUNOPS_DEFAULT;
1774 else
1775 coro->slot->runops = RUNOPS_DEFAULT;
1776 }
1777}
1778
1779static void
1780coro_call_on_destroy (pTHX_ struct coro *coro)
1781{
1782 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1783 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1784
1785 if (on_destroyp)
1786 {
1787 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1788
1789 while (AvFILLp (on_destroy) >= 0)
1790 {
1791 dSP; /* don't disturb outer sp */
1792 SV *cb = av_pop (on_destroy);
1793
1794 PUSHMARK (SP);
1795
1796 if (statusp)
1797 {
1798 int i;
1799 AV *status = (AV *)SvRV (*statusp);
1800 EXTEND (SP, AvFILLp (status) + 1);
1801
1802 for (i = 0; i <= AvFILLp (status); ++i)
1803 PUSHs (AvARRAY (status)[i]);
1804 }
1805
1806 PUTBACK;
1807 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1808 }
1809 }
1810}
1811
1812static void
1813slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 int i;
1816 HV *hv = (HV *)SvRV (coro_current);
1817 AV *av = newAV ();
1818
1819 av_extend (av, items - 1);
1820 for (i = 0; i < items; ++i)
1821 av_push (av, SvREFCNT_inc_NN (arg [i]));
1822
1823 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1824
1825 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1826 api_ready (aTHX_ sv_manager);
1827
1828 frame->prepare = prepare_schedule;
1829 frame->check = slf_check_repeat;
1830}
1831
1832/*****************************************************************************/
1833/* async pool handler */
1834
1121static int 1835static int
1122api_cede_notself (void) 1836slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1123{ 1837{
1838 HV *hv = (HV *)SvRV (coro_current);
1839 struct coro *coro = (struct coro *)frame->data;
1840
1841 if (!coro->invoke_cb)
1842 return 1; /* loop till we have invoke */
1843 else
1844 {
1845 hv_store (hv, "desc", sizeof ("desc") - 1,
1846 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1847
1848 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1849
1850 {
1851 dSP;
1852 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1853 PUTBACK;
1854 }
1855
1856 SvREFCNT_dec (GvAV (PL_defgv));
1857 GvAV (PL_defgv) = coro->invoke_av;
1858 coro->invoke_av = 0;
1859
1860 return 0;
1861 }
1862}
1863
1864static void
1865slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 HV *hv = (HV *)SvRV (coro_current);
1868 struct coro *coro = SvSTATE_hv ((SV *)hv);
1869
1870 if (expect_true (coro->saved_deffh))
1871 {
1872 /* subsequent iteration */
1873 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1874 coro->saved_deffh = 0;
1875
1876 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1877 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1878 {
1879 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1880 coro->invoke_av = newAV ();
1881
1882 frame->prepare = prepare_nop;
1883 }
1884 else
1885 {
1886 av_clear (GvAV (PL_defgv));
1887 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1888
1889 coro->prio = 0;
1890
1891 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1892 api_trace (aTHX_ coro_current, 0);
1893
1894 frame->prepare = prepare_schedule;
1895 av_push (av_async_pool, SvREFCNT_inc (hv));
1896 }
1897 }
1898 else
1899 {
1900 /* first iteration, simply fall through */
1901 frame->prepare = prepare_nop;
1902 }
1903
1904 frame->check = slf_check_pool_handler;
1905 frame->data = (void *)coro;
1906}
1907
1908/*****************************************************************************/
1909/* rouse callback */
1910
1911#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1912
1913static void
1914coro_rouse_callback (pTHX_ CV *cv)
1915{
1916 dXSARGS;
1917 SV *data = (SV *)GENSUB_ARG;
1918
1919 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1920 {
1921 /* first call, set args */
1922 AV *av = newAV ();
1923 SV *coro = SvRV (data);
1924
1925 SvRV_set (data, (SV *)av);
1926 api_ready (aTHX_ coro);
1927 SvREFCNT_dec (coro);
1928
1929 /* better take a full copy of the arguments */
1930 while (items--)
1931 av_store (av, items, newSVsv (ST (items)));
1932 }
1933
1934 XSRETURN_EMPTY;
1935}
1936
1937static int
1938slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1939{
1940 SV *data = (SV *)frame->data;
1941
1942 if (CORO_THROW)
1943 return 0;
1944
1945 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1946 return 1;
1947
1948 /* now push all results on the stack */
1949 {
1950 dSP;
1951 AV *av = (AV *)SvRV (data);
1952 int i;
1953
1954 EXTEND (SP, AvFILLp (av) + 1);
1955 for (i = 0; i <= AvFILLp (av); ++i)
1956 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1957
1958 /* we have stolen the elements, so ste length to zero and free */
1959 AvFILLp (av) = -1;
1960 av_undef (av);
1961
1962 PUTBACK;
1963 }
1964
1965 return 0;
1966}
1967
1968static void
1969slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1970{
1971 SV *cb;
1972
1973 if (items)
1974 cb = arg [0];
1975 else
1976 {
1977 struct coro *coro = SvSTATE_current;
1978
1979 if (!coro->rouse_cb)
1980 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1981
1982 cb = sv_2mortal (coro->rouse_cb);
1983 coro->rouse_cb = 0;
1984 }
1985
1986 if (!SvROK (cb)
1987 || SvTYPE (SvRV (cb)) != SVt_PVCV
1988 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1989 croak ("Coro::rouse_wait called with illegal callback argument,");
1990
1991 {
1992 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1993 SV *data = (SV *)GENSUB_ARG;
1994
1995 frame->data = (void *)data;
1996 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1997 frame->check = slf_check_rouse_wait;
1998 }
1999}
2000
2001static SV *
2002coro_new_rouse_cb (pTHX)
2003{
2004 HV *hv = (HV *)SvRV (coro_current);
2005 struct coro *coro = SvSTATE_hv (hv);
2006 SV *data = newRV_inc ((SV *)hv);
2007 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2008
2009 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2010 SvREFCNT_dec (data); /* magicext increases the refcount */
2011
2012 SvREFCNT_dec (coro->rouse_cb);
2013 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2014
2015 return cb;
2016}
2017
2018/*****************************************************************************/
2019/* schedule-like-function opcode (SLF) */
2020
2021static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2022static const CV *slf_cv;
2023static SV **slf_argv;
2024static int slf_argc, slf_arga; /* count, allocated */
2025static I32 slf_ax; /* top of stack, for restore */
2026
2027/* this restores the stack in the case we patched the entersub, to */
2028/* recreate the stack frame as perl will on following calls */
2029/* since entersub cleared the stack */
2030static OP *
2031pp_restore (pTHX)
2032{
2033 int i;
2034 SV **SP = PL_stack_base + slf_ax;
2035
2036 PUSHMARK (SP);
2037
2038 EXTEND (SP, slf_argc + 1);
2039
2040 for (i = 0; i < slf_argc; ++i)
2041 PUSHs (sv_2mortal (slf_argv [i]));
2042
2043 PUSHs ((SV *)CvGV (slf_cv));
2044
2045 RETURNOP (slf_restore.op_first);
2046}
2047
2048static void
2049slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2050{
2051 SV **arg = (SV **)slf_frame.data;
2052
2053 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2054}
2055
2056static void
2057slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 if (items != 2)
2060 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2061
2062 frame->prepare = slf_prepare_transfer;
2063 frame->check = slf_check_nop;
2064 frame->data = (void *)arg; /* let's hope it will stay valid */
2065}
2066
2067static void
2068slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 frame->prepare = prepare_schedule;
2071 frame->check = slf_check_nop;
2072}
2073
2074static void
2075slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2076{
2077 struct coro *next = (struct coro *)slf_frame.data;
2078
2079 SvREFCNT_inc_NN (next->hv);
2080 prepare_schedule_to (aTHX_ ta, next);
2081}
2082
2083static void
2084slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (!items)
2087 croak ("Coro::schedule_to expects a coroutine argument, caught");
2088
2089 frame->data = (void *)SvSTATE (arg [0]);
2090 frame->prepare = slf_prepare_schedule_to;
2091 frame->check = slf_check_nop;
2092}
2093
2094static void
2095slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 api_ready (aTHX_ SvRV (coro_current));
2098
2099 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2100}
2101
2102static void
2103slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 frame->prepare = prepare_cede;
2106 frame->check = slf_check_nop;
2107}
2108
2109static void
2110slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2111{
2112 frame->prepare = prepare_cede_notself;
2113 frame->check = slf_check_nop;
2114}
2115
2116/*
2117 * these not obviously related functions are all rolled into one
2118 * function to increase chances that they all will call transfer with the same
2119 * stack offset
2120 * SLF stands for "schedule-like-function".
2121 */
2122static OP *
2123pp_slf (pTHX)
2124{
2125 I32 checkmark; /* mark SP to see how many elements check has pushed */
2126
2127 /* set up the slf frame, unless it has already been set-up */
2128 /* the latter happens when a new coro has been started */
2129 /* or when a new cctx was attached to an existing coroutine */
2130 if (expect_true (!slf_frame.prepare))
2131 {
2132 /* first iteration */
2133 dSP;
2134 SV **arg = PL_stack_base + TOPMARK + 1;
2135 int items = SP - arg; /* args without function object */
2136 SV *gv = *sp;
2137
2138 /* do a quick consistency check on the "function" object, and if it isn't */
2139 /* for us, divert to the real entersub */
2140 if (SvTYPE (gv) != SVt_PVGV
2141 || !GvCV (gv)
2142 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2143 return PL_ppaddr[OP_ENTERSUB](aTHX);
2144
2145 if (!(PL_op->op_flags & OPf_STACKED))
2146 {
2147 /* ampersand-form of call, use @_ instead of stack */
2148 AV *av = GvAV (PL_defgv);
2149 arg = AvARRAY (av);
2150 items = AvFILLp (av) + 1;
2151 }
2152
2153 /* now call the init function, which needs to set up slf_frame */
2154 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2155 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2156
2157 /* pop args */
2158 SP = PL_stack_base + POPMARK;
2159
2160 PUTBACK;
2161 }
2162
2163 /* now that we have a slf_frame, interpret it! */
2164 /* we use a callback system not to make the code needlessly */
2165 /* complicated, but so we can run multiple perl coros from one cctx */
2166
2167 do
2168 {
1124 struct transfer_args ta; 2169 struct coro_transfer_args ta;
1125 2170
1126 if (prepare_cede_notself (&ta)) 2171 slf_frame.prepare (aTHX_ &ta);
1127 {
1128 TRANSFER (ta); 2172 TRANSFER (ta, 0);
2173
2174 checkmark = PL_stack_sp - PL_stack_base;
2175 }
2176 while (slf_frame.check (aTHX_ &slf_frame));
2177
2178 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2179
2180 /* exception handling */
2181 if (expect_false (CORO_THROW))
2182 {
2183 SV *exception = sv_2mortal (CORO_THROW);
2184
2185 CORO_THROW = 0;
2186 sv_setsv (ERRSV, exception);
2187 croak (0);
2188 }
2189
2190 /* return value handling - mostly like entersub */
2191 /* make sure we put something on the stack in scalar context */
2192 if (GIMME_V == G_SCALAR)
2193 {
2194 dSP;
2195 SV **bot = PL_stack_base + checkmark;
2196
2197 if (sp == bot) /* too few, push undef */
2198 bot [1] = &PL_sv_undef;
2199 else if (sp != bot + 1) /* too many, take last one */
2200 bot [1] = *sp;
2201
2202 SP = bot + 1;
2203
2204 PUTBACK;
2205 }
2206
2207 return NORMAL;
2208}
2209
2210static void
2211api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2212{
2213 int i;
2214 SV **arg = PL_stack_base + ax;
2215 int items = PL_stack_sp - arg + 1;
2216
2217 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2218
2219 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2220 && PL_op->op_ppaddr != pp_slf)
2221 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2222
2223 CvFLAGS (cv) |= CVf_SLF;
2224 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2225 slf_cv = cv;
2226
2227 /* we patch the op, and then re-run the whole call */
2228 /* we have to put the same argument on the stack for this to work */
2229 /* and this will be done by pp_restore */
2230 slf_restore.op_next = (OP *)&slf_restore;
2231 slf_restore.op_type = OP_CUSTOM;
2232 slf_restore.op_ppaddr = pp_restore;
2233 slf_restore.op_first = PL_op;
2234
2235 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2236
2237 if (PL_op->op_flags & OPf_STACKED)
2238 {
2239 if (items > slf_arga)
2240 {
2241 slf_arga = items;
2242 free (slf_argv);
2243 slf_argv = malloc (slf_arga * sizeof (SV *));
2244 }
2245
2246 slf_argc = items;
2247
2248 for (i = 0; i < items; ++i)
2249 slf_argv [i] = SvREFCNT_inc (arg [i]);
2250 }
2251 else
2252 slf_argc = 0;
2253
2254 PL_op->op_ppaddr = pp_slf;
2255 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2256
2257 PL_op = (OP *)&slf_restore;
2258}
2259
2260/*****************************************************************************/
2261/* PerlIO::cede */
2262
2263typedef struct
2264{
2265 PerlIOBuf base;
2266 NV next, every;
2267} PerlIOCede;
2268
2269static IV
2270PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2271{
2272 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2273
2274 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2275 self->next = nvtime () + self->every;
2276
2277 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2278}
2279
2280static SV *
2281PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2282{
2283 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2284
2285 return newSVnv (self->every);
2286}
2287
2288static IV
2289PerlIOCede_flush (pTHX_ PerlIO *f)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292 double now = nvtime ();
2293
2294 if (now >= self->next)
2295 {
2296 api_cede (aTHX);
2297 self->next = now + self->every;
2298 }
2299
2300 return PerlIOBuf_flush (aTHX_ f);
2301}
2302
2303static PerlIO_funcs PerlIO_cede =
2304{
2305 sizeof(PerlIO_funcs),
2306 "cede",
2307 sizeof(PerlIOCede),
2308 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2309 PerlIOCede_pushed,
2310 PerlIOBuf_popped,
2311 PerlIOBuf_open,
2312 PerlIOBase_binmode,
2313 PerlIOCede_getarg,
2314 PerlIOBase_fileno,
2315 PerlIOBuf_dup,
2316 PerlIOBuf_read,
2317 PerlIOBuf_unread,
2318 PerlIOBuf_write,
2319 PerlIOBuf_seek,
2320 PerlIOBuf_tell,
2321 PerlIOBuf_close,
2322 PerlIOCede_flush,
2323 PerlIOBuf_fill,
2324 PerlIOBase_eof,
2325 PerlIOBase_error,
2326 PerlIOBase_clearerr,
2327 PerlIOBase_setlinebuf,
2328 PerlIOBuf_get_base,
2329 PerlIOBuf_bufsiz,
2330 PerlIOBuf_get_ptr,
2331 PerlIOBuf_get_cnt,
2332 PerlIOBuf_set_ptrcnt,
2333};
2334
2335/*****************************************************************************/
2336/* Coro::Semaphore & Coro::Signal */
2337
2338static SV *
2339coro_waitarray_new (pTHX_ int count)
2340{
2341 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2342 AV *av = newAV ();
2343 SV **ary;
2344
2345 /* unfortunately, building manually saves memory */
2346 Newx (ary, 2, SV *);
2347 AvALLOC (av) = ary;
2348 /*AvARRAY (av) = ary;*/
2349 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2350 AvMAX (av) = 1;
2351 AvFILLp (av) = 0;
2352 ary [0] = newSViv (count);
2353
2354 return newRV_noinc ((SV *)av);
2355}
2356
2357/* semaphore */
2358
2359static void
2360coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2361{
2362 SV *count_sv = AvARRAY (av)[0];
2363 IV count = SvIVX (count_sv);
2364
2365 count += adjust;
2366 SvIVX (count_sv) = count;
2367
2368 /* now wake up as many waiters as are expected to lock */
2369 while (count > 0 && AvFILLp (av) > 0)
2370 {
2371 SV *cb;
2372
2373 /* swap first two elements so we can shift a waiter */
2374 AvARRAY (av)[0] = AvARRAY (av)[1];
2375 AvARRAY (av)[1] = count_sv;
2376 cb = av_shift (av);
2377
2378 if (SvOBJECT (cb))
2379 {
2380 api_ready (aTHX_ cb);
2381 --count;
2382 }
2383 else if (SvTYPE (cb) == SVt_PVCV)
2384 {
2385 dSP;
2386 PUSHMARK (SP);
2387 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2388 PUTBACK;
2389 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2390 }
2391
2392 SvREFCNT_dec (cb);
2393 }
2394}
2395
2396static void
2397coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2398{
2399 /* call $sem->adjust (0) to possibly wake up some other waiters */
2400 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2401}
2402
2403static int
2404slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2405{
2406 AV *av = (AV *)frame->data;
2407 SV *count_sv = AvARRAY (av)[0];
2408
2409 /* if we are about to throw, don't actually acquire the lock, just throw */
2410 if (CORO_THROW)
2411 return 0;
2412 else if (SvIVX (count_sv) > 0)
2413 {
2414 SvSTATE_current->on_destroy = 0;
2415
2416 if (acquire)
2417 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2418 else
2419 coro_semaphore_adjust (aTHX_ av, 0);
2420
2421 return 0;
2422 }
2423 else
2424 {
2425 int i;
2426 /* if we were woken up but can't down, we look through the whole */
2427 /* waiters list and only add us if we aren't in there already */
2428 /* this avoids some degenerate memory usage cases */
2429
2430 for (i = 1; i <= AvFILLp (av); ++i)
2431 if (AvARRAY (av)[i] == SvRV (coro_current))
2432 return 1;
2433
2434 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1129 return 1; 2435 return 1;
1130 } 2436 }
2437}
2438
2439static int
2440slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2441{
2442 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2443}
2444
2445static int
2446slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2449}
2450
2451static void
2452slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 AV *av = (AV *)SvRV (arg [0]);
2455
2456 if (SvIVX (AvARRAY (av)[0]) > 0)
2457 {
2458 frame->data = (void *)av;
2459 frame->prepare = prepare_nop;
2460 }
1131 else 2461 else
2462 {
2463 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2464
2465 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2466 frame->prepare = prepare_schedule;
2467
2468 /* to avoid race conditions when a woken-up coro gets terminated */
2469 /* we arrange for a temporary on_destroy that calls adjust (0) */
2470 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2471 }
2472}
2473
2474static void
2475slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2476{
2477 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2478 frame->check = slf_check_semaphore_down;
2479}
2480
2481static void
2482slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 if (items >= 2)
2485 {
2486 /* callback form */
2487 AV *av = (AV *)SvRV (arg [0]);
2488 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2489
2490 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2491
2492 if (SvIVX (AvARRAY (av)[0]) > 0)
2493 coro_semaphore_adjust (aTHX_ av, 0);
2494
2495 frame->prepare = prepare_nop;
2496 frame->check = slf_check_nop;
2497 }
2498 else
2499 {
2500 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2501 frame->check = slf_check_semaphore_wait;
2502 }
2503}
2504
2505/* signal */
2506
2507static void
2508coro_signal_wake (pTHX_ AV *av, int count)
2509{
2510 SvIVX (AvARRAY (av)[0]) = 0;
2511
2512 /* now signal count waiters */
2513 while (count > 0 && AvFILLp (av) > 0)
2514 {
2515 SV *cb;
2516
2517 /* swap first two elements so we can shift a waiter */
2518 cb = AvARRAY (av)[0];
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = cb;
2521
2522 cb = av_shift (av);
2523
2524 api_ready (aTHX_ cb);
2525 sv_setiv (cb, 0); /* signal waiter */
2526 SvREFCNT_dec (cb);
2527
2528 --count;
2529 }
2530}
2531
2532static int
2533slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2534{
2535 /* if we are about to throw, also stop waiting */
2536 return SvROK ((SV *)frame->data) && !CORO_THROW;
2537}
2538
2539static void
2540slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 AV *av = (AV *)SvRV (arg [0]);
2543
2544 if (SvIVX (AvARRAY (av)[0]))
2545 {
2546 SvIVX (AvARRAY (av)[0]) = 0;
2547 frame->prepare = prepare_nop;
2548 frame->check = slf_check_nop;
2549 }
2550 else
2551 {
2552 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2553
2554 av_push (av, waiter);
2555
2556 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_signal_wait;
2559 }
2560}
2561
2562/*****************************************************************************/
2563/* Coro::AIO */
2564
2565#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2566
2567/* helper storage struct */
2568struct io_state
2569{
2570 int errorno;
2571 I32 laststype; /* U16 in 5.10.0 */
2572 int laststatval;
2573 Stat_t statcache;
2574};
2575
2576static void
2577coro_aio_callback (pTHX_ CV *cv)
2578{
2579 dXSARGS;
2580 AV *state = (AV *)GENSUB_ARG;
2581 SV *coro = av_pop (state);
2582 SV *data_sv = newSV (sizeof (struct io_state));
2583
2584 av_extend (state, items - 1);
2585
2586 sv_upgrade (data_sv, SVt_PV);
2587 SvCUR_set (data_sv, sizeof (struct io_state));
2588 SvPOK_only (data_sv);
2589
2590 {
2591 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2592
2593 data->errorno = errno;
2594 data->laststype = PL_laststype;
2595 data->laststatval = PL_laststatval;
2596 data->statcache = PL_statcache;
2597 }
2598
2599 /* now build the result vector out of all the parameters and the data_sv */
2600 {
2601 int i;
2602
2603 for (i = 0; i < items; ++i)
2604 av_push (state, SvREFCNT_inc_NN (ST (i)));
2605 }
2606
2607 av_push (state, data_sv);
2608
2609 api_ready (aTHX_ coro);
2610 SvREFCNT_dec (coro);
2611 SvREFCNT_dec ((AV *)state);
2612}
2613
2614static int
2615slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2616{
2617 AV *state = (AV *)frame->data;
2618
2619 /* if we are about to throw, return early */
2620 /* this does not cancel the aio request, but at least */
2621 /* it quickly returns */
2622 if (CORO_THROW)
1132 return 0; 2623 return 0;
1133}
1134 2624
2625 /* one element that is an RV? repeat! */
2626 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2627 return 1;
2628
2629 /* restore status */
2630 {
2631 SV *data_sv = av_pop (state);
2632 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2633
2634 errno = data->errorno;
2635 PL_laststype = data->laststype;
2636 PL_laststatval = data->laststatval;
2637 PL_statcache = data->statcache;
2638
2639 SvREFCNT_dec (data_sv);
2640 }
2641
2642 /* push result values */
2643 {
2644 dSP;
2645 int i;
2646
2647 EXTEND (SP, AvFILLp (state) + 1);
2648 for (i = 0; i <= AvFILLp (state); ++i)
2649 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2650
2651 PUTBACK;
2652 }
2653
2654 return 0;
2655}
2656
2657static void
2658slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2661 SV *coro_hv = SvRV (coro_current);
2662 struct coro *coro = SvSTATE_hv (coro_hv);
2663
2664 /* put our coroutine id on the state arg */
2665 av_push (state, SvREFCNT_inc_NN (coro_hv));
2666
2667 /* first see whether we have a non-zero priority and set it as AIO prio */
2668 if (coro->prio)
2669 {
2670 dSP;
2671
2672 static SV *prio_cv;
2673 static SV *prio_sv;
2674
2675 if (expect_false (!prio_cv))
2676 {
2677 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2678 prio_sv = newSViv (0);
2679 }
2680
2681 PUSHMARK (SP);
2682 sv_setiv (prio_sv, coro->prio);
2683 XPUSHs (prio_sv);
2684
2685 PUTBACK;
2686 call_sv (prio_cv, G_VOID | G_DISCARD);
2687 }
2688
2689 /* now call the original request */
2690 {
2691 dSP;
2692 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2693 int i;
2694
2695 PUSHMARK (SP);
2696
2697 /* first push all args to the stack */
2698 EXTEND (SP, items + 1);
2699
2700 for (i = 0; i < items; ++i)
2701 PUSHs (arg [i]);
2702
2703 /* now push the callback closure */
2704 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2705
2706 /* now call the AIO function - we assume our request is uncancelable */
2707 PUTBACK;
2708 call_sv ((SV *)req, G_VOID | G_DISCARD);
2709 }
2710
2711 /* now that the requets is going, we loop toll we have a result */
2712 frame->data = (void *)state;
2713 frame->prepare = prepare_schedule;
2714 frame->check = slf_check_aio_req;
2715}
2716
2717static void
2718coro_aio_req_xs (pTHX_ CV *cv)
2719{
2720 dXSARGS;
2721
2722 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2723
2724 XSRETURN_EMPTY;
2725}
2726
2727/*****************************************************************************/
2728
1135MODULE = Coro::State PACKAGE = Coro::State 2729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1136 2730
1137PROTOTYPES: DISABLE 2731PROTOTYPES: DISABLE
1138 2732
1139BOOT: 2733BOOT:
1140{ 2734{
1141#ifdef USE_ITHREADS 2735#ifdef USE_ITHREADS
1142 MUTEX_INIT (&coro_mutex); 2736# if CORO_PTHREAD
2737 coro_thx = PERL_GET_CONTEXT;
2738# endif
1143#endif 2739#endif
1144 BOOT_PAGESIZE; 2740 BOOT_PAGESIZE;
1145 2741
2742 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2743 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2744
2745 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2746 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2747 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2748
2749 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2750 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2751 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2752
1146 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2753 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1147 2754
2755 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2756 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2757 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1150 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2758 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1153 2759
1154 main_mainstack = PL_mainstack; 2760 main_mainstack = PL_mainstack;
2761 main_top_env = PL_top_env;
1155 2762
2763 while (main_top_env->je_prev)
2764 main_top_env = main_top_env->je_prev;
2765
2766 {
2767 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2768
2769 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2770 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2771
2772 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2773 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2774 }
2775
1156 coroapi.ver = CORO_API_VERSION; 2776 coroapi.ver = CORO_API_VERSION;
2777 coroapi.rev = CORO_API_REVISION;
2778
1157 coroapi.transfer = api_transfer; 2779 coroapi.transfer = api_transfer;
2780
2781 coroapi.sv_state = SvSTATE_;
2782 coroapi.execute_slf = api_execute_slf;
2783 coroapi.prepare_nop = prepare_nop;
2784 coroapi.prepare_schedule = prepare_schedule;
2785 coroapi.prepare_cede = prepare_cede;
2786 coroapi.prepare_cede_notself = prepare_cede_notself;
2787
2788 {
2789 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2790
2791 if (!svp) croak ("Time::HiRes is required");
2792 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2793
2794 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2795 }
1158 2796
1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2797 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1160} 2798}
1161 2799
1162SV * 2800SV *
1163new (char *klass, ...) 2801new (char *klass, ...)
2802 ALIAS:
2803 Coro::new = 1
1164 CODE: 2804 CODE:
1165{ 2805{
1166 struct coro *coro; 2806 struct coro *coro;
2807 MAGIC *mg;
1167 HV *hv; 2808 HV *hv;
2809 CV *cb;
1168 int i; 2810 int i;
1169 2811
2812 if (items > 1)
2813 {
2814 cb = coro_sv_2cv (aTHX_ ST (1));
2815
2816 if (!ix)
2817 {
2818 if (CvISXSUB (cb))
2819 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2820
2821 if (!CvROOT (cb))
2822 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2823 }
2824 }
2825
1170 Newz (0, coro, 1, struct coro); 2826 Newz (0, coro, 1, struct coro);
1171 coro->args = newAV (); 2827 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL;
1173 coro->flags = CF_NEW; 2828 coro->flags = CF_NEW;
1174 2829
2830 if (coro_first) coro_first->prev = coro;
2831 coro->next = coro_first;
2832 coro_first = coro;
2833
1175 hv = newHV (); 2834 coro->hv = hv = newHV ();
1176 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2835 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2836 mg->mg_flags |= MGf_DUP;
1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2837 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1178 2838
2839 if (items > 1)
2840 {
2841 av_extend (coro->args, items - 1 + ix - 1);
2842
2843 if (ix)
2844 {
2845 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2846 cb = cv_coro_run;
2847 }
2848
2849 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2850
1179 for (i = 1; i < items; i++) 2851 for (i = 2; i < items; i++)
1180 av_push (coro->args, newSVsv (ST (i))); 2852 av_push (coro->args, newSVsv (ST (i)));
2853 }
1181} 2854}
1182 OUTPUT: 2855 OUTPUT:
1183 RETVAL 2856 RETVAL
1184 2857
1185int 2858void
1186save (SV *coro, int new_save = -1) 2859transfer (...)
2860 PROTOTYPE: $$
1187 CODE: 2861 CODE:
1188 RETVAL = api_save (coro, new_save); 2862 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1189 OUTPUT:
1190 RETVAL
1191
1192void
1193_set_stacklevel (...)
1194 ALIAS:
1195 Coro::State::transfer = 1
1196 Coro::schedule = 2
1197 Coro::cede = 3
1198 Coro::cede_notself = 4
1199 CODE:
1200{
1201 struct transfer_args ta;
1202
1203 switch (ix)
1204 {
1205 case 0:
1206 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1207 ta.next = 0;
1208 break;
1209
1210 case 1:
1211 if (items != 2)
1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213
1214 prepare_transfer (&ta, ST (0), ST (1));
1215 break;
1216
1217 case 2:
1218 prepare_schedule (&ta);
1219 break;
1220
1221 case 3:
1222 prepare_cede (&ta);
1223 break;
1224
1225 case 4:
1226 if (!prepare_cede_notself (&ta))
1227 XSRETURN_EMPTY;
1228
1229 break;
1230 }
1231
1232 BARRIER;
1233 TRANSFER (ta);
1234
1235 if (GIMME_V != G_VOID && ta.next != ta.prev)
1236 XSRETURN_YES;
1237}
1238 2863
1239bool 2864bool
1240_destroy (SV *coro_sv) 2865_destroy (SV *coro_sv)
1241 CODE: 2866 CODE:
1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 2867 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1243 OUTPUT: 2868 OUTPUT:
1244 RETVAL 2869 RETVAL
1245 2870
1246void 2871void
1247_exit (code) 2872_exit (int code)
1248 int code
1249 PROTOTYPE: $ 2873 PROTOTYPE: $
1250 CODE: 2874 CODE:
1251 _exit (code); 2875 _exit (code);
1252 2876
1253int 2877int
2878cctx_stacksize (int new_stacksize = 0)
2879 PROTOTYPE: ;$
2880 CODE:
2881 RETVAL = cctx_stacksize;
2882 if (new_stacksize)
2883 {
2884 cctx_stacksize = new_stacksize;
2885 ++cctx_gen;
2886 }
2887 OUTPUT:
2888 RETVAL
2889
2890int
2891cctx_max_idle (int max_idle = 0)
2892 PROTOTYPE: ;$
2893 CODE:
2894 RETVAL = cctx_max_idle;
2895 if (max_idle > 1)
2896 cctx_max_idle = max_idle;
2897 OUTPUT:
2898 RETVAL
2899
2900int
1254cctx_count () 2901cctx_count ()
2902 PROTOTYPE:
1255 CODE: 2903 CODE:
1256 RETVAL = cctx_count; 2904 RETVAL = cctx_count;
1257 OUTPUT: 2905 OUTPUT:
1258 RETVAL 2906 RETVAL
1259 2907
1260int 2908int
1261cctx_idle () 2909cctx_idle ()
2910 PROTOTYPE:
1262 CODE: 2911 CODE:
1263 RETVAL = cctx_idle; 2912 RETVAL = cctx_idle;
1264 OUTPUT: 2913 OUTPUT:
1265 RETVAL 2914 RETVAL
1266 2915
2916void
2917list ()
2918 PROTOTYPE:
2919 PPCODE:
2920{
2921 struct coro *coro;
2922 for (coro = coro_first; coro; coro = coro->next)
2923 if (coro->hv)
2924 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2925}
2926
2927void
2928call (Coro::State coro, SV *coderef)
2929 ALIAS:
2930 eval = 1
2931 CODE:
2932{
2933 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2934 {
2935 struct coro temp;
2936
2937 if (!(coro->flags & CF_RUNNING))
2938 {
2939 PUTBACK;
2940 save_perl (aTHX_ &temp);
2941 load_perl (aTHX_ coro);
2942 }
2943
2944 {
2945 dSP;
2946 ENTER;
2947 SAVETMPS;
2948 PUTBACK;
2949 PUSHSTACK;
2950 PUSHMARK (SP);
2951
2952 if (ix)
2953 eval_sv (coderef, 0);
2954 else
2955 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2956
2957 POPSTACK;
2958 SPAGAIN;
2959 FREETMPS;
2960 LEAVE;
2961 PUTBACK;
2962 }
2963
2964 if (!(coro->flags & CF_RUNNING))
2965 {
2966 save_perl (aTHX_ coro);
2967 load_perl (aTHX_ &temp);
2968 SPAGAIN;
2969 }
2970 }
2971}
2972
2973SV *
2974is_ready (Coro::State coro)
2975 PROTOTYPE: $
2976 ALIAS:
2977 is_ready = CF_READY
2978 is_running = CF_RUNNING
2979 is_new = CF_NEW
2980 is_destroyed = CF_DESTROYED
2981 CODE:
2982 RETVAL = boolSV (coro->flags & ix);
2983 OUTPUT:
2984 RETVAL
2985
2986void
2987throw (Coro::State self, SV *throw = &PL_sv_undef)
2988 PROTOTYPE: $;$
2989 CODE:
2990{
2991 struct coro *current = SvSTATE_current;
2992 SV **throwp = self == current ? &CORO_THROW : &self->except;
2993 SvREFCNT_dec (*throwp);
2994 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2995}
2996
2997void
2998api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2999 PROTOTYPE: $;$
3000 C_ARGS: aTHX_ coro, flags
3001
3002SV *
3003has_cctx (Coro::State coro)
3004 PROTOTYPE: $
3005 CODE:
3006 RETVAL = boolSV (!!coro->cctx);
3007 OUTPUT:
3008 RETVAL
3009
3010int
3011is_traced (Coro::State coro)
3012 PROTOTYPE: $
3013 CODE:
3014 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3015 OUTPUT:
3016 RETVAL
3017
3018UV
3019rss (Coro::State coro)
3020 PROTOTYPE: $
3021 ALIAS:
3022 usecount = 1
3023 CODE:
3024 switch (ix)
3025 {
3026 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3027 case 1: RETVAL = coro->usecount; break;
3028 }
3029 OUTPUT:
3030 RETVAL
3031
3032void
3033force_cctx ()
3034 PROTOTYPE:
3035 CODE:
3036 SvSTATE_current->cctx->idle_sp = 0;
3037
3038void
3039swap_defsv (Coro::State self)
3040 PROTOTYPE: $
3041 ALIAS:
3042 swap_defav = 1
3043 CODE:
3044 if (!self->slot)
3045 croak ("cannot swap state with coroutine that has no saved state,");
3046 else
3047 {
3048 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3049 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3050
3051 SV *tmp = *src; *src = *dst; *dst = tmp;
3052 }
3053
3054
1267MODULE = Coro::State PACKAGE = Coro 3055MODULE = Coro::State PACKAGE = Coro
1268 3056
1269BOOT: 3057BOOT:
1270{ 3058{
1271 int i; 3059 int i;
1272 3060
3061 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3062 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3063 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3064 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3065 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3066 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3067 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3068 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3069
3070 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3071 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3072 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3073 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3074
1273 coro_stash = gv_stashpv ("Coro", TRUE); 3075 coro_stash = gv_stashpv ("Coro", TRUE);
1274 3076
1275 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3077 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1276 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3078 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1277 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3079 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1278 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3080 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1279 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3081 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1280 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3082 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1281 3083
1282 coro_current = get_sv ("Coro::current", FALSE);
1283 SvREADONLY_on (coro_current);
1284
1285 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3084 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1286 coro_ready[i] = newAV (); 3085 coro_ready[i] = newAV ();
1287 3086
1288 { 3087 {
1289 SV *sv = perl_get_sv("Coro::API", 1); 3088 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1290 3089
1291 coroapi.schedule = api_schedule; 3090 coroapi.schedule = api_schedule;
1292 coroapi.save = api_save; 3091 coroapi.schedule_to = api_schedule_to;
1293 coroapi.cede = api_cede; 3092 coroapi.cede = api_cede;
1294 coroapi.cede_notself = api_cede_notself; 3093 coroapi.cede_notself = api_cede_notself;
1295 coroapi.ready = api_ready; 3094 coroapi.ready = api_ready;
1296 coroapi.is_ready = api_is_ready; 3095 coroapi.is_ready = api_is_ready;
1297 coroapi.nready = &coro_nready; 3096 coroapi.nready = coro_nready;
1298 coroapi.current = coro_current; 3097 coroapi.current = coro_current;
1299 3098
1300 GCoroAPI = &coroapi; 3099 /*GCoroAPI = &coroapi;*/
1301 sv_setiv (sv, (IV)&coroapi); 3100 sv_setiv (sv, (IV)&coroapi);
1302 SvREADONLY_on (sv); 3101 SvREADONLY_on (sv);
1303 } 3102 }
1304} 3103}
3104
3105void
3106terminate (...)
3107 CODE:
3108 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3109
3110void
3111schedule (...)
3112 CODE:
3113 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3114
3115void
3116schedule_to (...)
3117 CODE:
3118 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3119
3120void
3121cede_to (...)
3122 CODE:
3123 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3124
3125void
3126cede (...)
3127 CODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_cede);
3129
3130void
3131cede_notself (...)
3132 CODE:
3133 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3134
3135void
3136_cancel (Coro::State self)
3137 CODE:
3138 coro_state_destroy (aTHX_ self);
3139 coro_call_on_destroy (aTHX_ self);
1305 3140
1306void 3141void
1307_set_current (SV *current) 3142_set_current (SV *current)
1308 PROTOTYPE: $ 3143 PROTOTYPE: $
1309 CODE: 3144 CODE:
1310 SvREFCNT_dec (SvRV (coro_current)); 3145 SvREFCNT_dec (SvRV (coro_current));
1311 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3146 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3147
3148void
3149_set_readyhook (SV *hook)
3150 PROTOTYPE: $
3151 CODE:
3152 SvREFCNT_dec (coro_readyhook);
3153 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1312 3154
1313int 3155int
1314prio (Coro::State coro, int newprio = 0) 3156prio (Coro::State coro, int newprio = 0)
3157 PROTOTYPE: $;$
1315 ALIAS: 3158 ALIAS:
1316 nice = 1 3159 nice = 1
1317 CODE: 3160 CODE:
1318{ 3161{
1319 RETVAL = coro->prio; 3162 RETVAL = coro->prio;
… …
1334 3177
1335SV * 3178SV *
1336ready (SV *self) 3179ready (SV *self)
1337 PROTOTYPE: $ 3180 PROTOTYPE: $
1338 CODE: 3181 CODE:
1339 RETVAL = boolSV (api_ready (self)); 3182 RETVAL = boolSV (api_ready (aTHX_ self));
1340 OUTPUT:
1341 RETVAL
1342
1343SV *
1344is_ready (SV *self)
1345 PROTOTYPE: $
1346 CODE:
1347 RETVAL = boolSV (api_is_ready (self));
1348 OUTPUT: 3183 OUTPUT:
1349 RETVAL 3184 RETVAL
1350 3185
1351int 3186int
1352nready (...) 3187nready (...)
… …
1354 CODE: 3189 CODE:
1355 RETVAL = coro_nready; 3190 RETVAL = coro_nready;
1356 OUTPUT: 3191 OUTPUT:
1357 RETVAL 3192 RETVAL
1358 3193
1359MODULE = Coro::State PACKAGE = Coro::AIO 3194void
3195_pool_handler (...)
3196 CODE:
3197 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3198
3199void
3200async_pool (SV *cv, ...)
3201 PROTOTYPE: &@
3202 PPCODE:
3203{
3204 HV *hv = (HV *)av_pop (av_async_pool);
3205 AV *av = newAV ();
3206 SV *cb = ST (0);
3207 int i;
3208
3209 av_extend (av, items - 2);
3210 for (i = 1; i < items; ++i)
3211 av_push (av, SvREFCNT_inc_NN (ST (i)));
3212
3213 if ((SV *)hv == &PL_sv_undef)
3214 {
3215 PUSHMARK (SP);
3216 EXTEND (SP, 2);
3217 PUSHs (sv_Coro);
3218 PUSHs ((SV *)cv_pool_handler);
3219 PUTBACK;
3220 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3221 SPAGAIN;
3222
3223 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3224 }
3225
3226 {
3227 struct coro *coro = SvSTATE_hv (hv);
3228
3229 assert (!coro->invoke_cb);
3230 assert (!coro->invoke_av);
3231 coro->invoke_cb = SvREFCNT_inc (cb);
3232 coro->invoke_av = av;
3233 }
3234
3235 api_ready (aTHX_ (SV *)hv);
3236
3237 if (GIMME_V != G_VOID)
3238 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3239 else
3240 SvREFCNT_dec (hv);
3241}
1360 3242
1361SV * 3243SV *
1362_get_state () 3244rouse_cb ()
3245 PROTOTYPE:
1363 CODE: 3246 CODE:
1364{ 3247 RETVAL = coro_new_rouse_cb (aTHX);
1365 struct io_state *data;
1366
1367 RETVAL = newSV (sizeof (struct io_state));
1368 data = (struct io_state *)SvPVX (RETVAL);
1369 SvCUR_set (RETVAL, sizeof (struct io_state));
1370 SvPOK_only (RETVAL);
1371
1372 data->errorno = errno;
1373 data->laststype = PL_laststype;
1374 data->laststatval = PL_laststatval;
1375 data->statcache = PL_statcache;
1376}
1377 OUTPUT: 3248 OUTPUT:
1378 RETVAL 3249 RETVAL
1379 3250
1380void 3251void
1381_set_state (char *data_) 3252rouse_wait (...)
1382 PROTOTYPE: $ 3253 PROTOTYPE: ;$
3254 PPCODE:
3255 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3256
3257
3258MODULE = Coro::State PACKAGE = PerlIO::cede
3259
3260BOOT:
3261 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3262
3263
3264MODULE = Coro::State PACKAGE = Coro::Semaphore
3265
3266SV *
3267new (SV *klass, SV *count = 0)
1383 CODE: 3268 CODE:
1384{ 3269 RETVAL = sv_bless (
1385 struct io_state *data = (void *)data_; 3270 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3271 GvSTASH (CvGV (cv))
3272 );
3273 OUTPUT:
3274 RETVAL
1386 3275
1387 errno = data->errorno; 3276# helper for Coro::Channel
1388 PL_laststype = data->laststype; 3277SV *
1389 PL_laststatval = data->laststatval; 3278_alloc (int count)
1390 PL_statcache = data->statcache; 3279 CODE:
1391} 3280 RETVAL = coro_waitarray_new (aTHX_ count);
3281 OUTPUT:
3282 RETVAL
1392 3283
3284SV *
3285count (SV *self)
3286 CODE:
3287 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3288 OUTPUT:
3289 RETVAL
3290
3291void
3292up (SV *self, int adjust = 1)
3293 ALIAS:
3294 adjust = 1
3295 CODE:
3296 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3297
3298void
3299down (...)
3300 CODE:
3301 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3302
3303void
3304wait (...)
3305 CODE:
3306 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3307
3308void
3309try (SV *self)
3310 PPCODE:
3311{
3312 AV *av = (AV *)SvRV (self);
3313 SV *count_sv = AvARRAY (av)[0];
3314 IV count = SvIVX (count_sv);
3315
3316 if (count > 0)
3317 {
3318 --count;
3319 SvIVX (count_sv) = count;
3320 XSRETURN_YES;
3321 }
3322 else
3323 XSRETURN_NO;
3324}
3325
3326void
3327waiters (SV *self)
3328 PPCODE:
3329{
3330 AV *av = (AV *)SvRV (self);
3331 int wcount = AvFILLp (av) + 1 - 1;
3332
3333 if (GIMME_V == G_SCALAR)
3334 XPUSHs (sv_2mortal (newSViv (wcount)));
3335 else
3336 {
3337 int i;
3338 EXTEND (SP, wcount);
3339 for (i = 1; i <= wcount; ++i)
3340 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3341 }
3342}
3343
3344MODULE = Coro::State PACKAGE = Coro::Signal
3345
3346SV *
3347new (SV *klass)
3348 CODE:
3349 RETVAL = sv_bless (
3350 coro_waitarray_new (aTHX_ 0),
3351 GvSTASH (CvGV (cv))
3352 );
3353 OUTPUT:
3354 RETVAL
3355
3356void
3357wait (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3360
3361void
3362broadcast (SV *self)
3363 CODE:
3364{
3365 AV *av = (AV *)SvRV (self);
3366 coro_signal_wake (aTHX_ av, AvFILLp (av));
3367}
3368
3369void
3370send (SV *self)
3371 CODE:
3372{
3373 AV *av = (AV *)SvRV (self);
3374
3375 if (AvFILLp (av))
3376 coro_signal_wake (aTHX_ av, 1);
3377 else
3378 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3379}
3380
3381IV
3382awaited (SV *self)
3383 CODE:
3384 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3385 OUTPUT:
3386 RETVAL
3387
3388
3389MODULE = Coro::State PACKAGE = Coro::AnyEvent
3390
3391BOOT:
3392 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3393
3394void
3395_schedule (...)
3396 CODE:
3397{
3398 static int incede;
3399
3400 api_cede_notself (aTHX);
3401
3402 ++incede;
3403 while (coro_nready >= incede && api_cede (aTHX))
3404 ;
3405
3406 sv_setsv (sv_activity, &PL_sv_undef);
3407 if (coro_nready >= incede)
3408 {
3409 PUSHMARK (SP);
3410 PUTBACK;
3411 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3412 }
3413
3414 --incede;
3415}
3416
3417
3418MODULE = Coro::State PACKAGE = Coro::AIO
3419
3420void
3421_register (char *target, char *proto, SV *req)
3422 CODE:
3423{
3424 CV *req_cv = coro_sv_2cv (aTHX_ req);
3425 /* newXSproto doesn't return the CV on 5.8 */
3426 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3427 sv_setpv ((SV *)slf_cv, proto);
3428 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3429}
3430

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