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Comparing Coro/Coro/State.xs (file contents):
Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC vs.
Revision 1.317 by root, Thu Nov 20 06:28:52 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
146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
103 149
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)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif 158# 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 GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static SV *sv_async_pool_idle;
185static AV *av_async_pool;
186static SV *sv_Coro;
187static CV *cv_pool_handler;
188static CV *cv_coro_state_new;
189
190/* Coro::AnyEvent */
191static SV *sv_activity;
130 192
131static struct coro_cctx *cctx_first; 193static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 194static int cctx_count, cctx_idle;
133 195
196enum {
197 CC_MAPPED = 0x01,
198 CC_NOREUSE = 0x02, /* throw this away after tracing */
199 CC_TRACE = 0x04,
200 CC_TRACE_SUB = 0x08, /* trace sub calls */
201 CC_TRACE_LINE = 0x10, /* trace each statement */
202 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
203};
204
134/* this is a structure representing a c-level coroutine */ 205/* this is a structure representing a c-level coroutine */
135typedef struct coro_cctx { 206typedef struct coro_cctx
207{
136 struct coro_cctx *next; 208 struct coro_cctx *next;
137 209
138 /* the stack */ 210 /* the stack */
139 void *sptr; 211 void *sptr;
140 long ssize; /* positive == mmap, otherwise malloc */ 212 size_t ssize;
141 213
142 /* cpu state */ 214 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 215 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 */ 216 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env; 217 JMPENV *top_env;
146 coro_context cctx; 218 coro_context cctx;
147 219
148 int inuse; 220 U32 gen;
149
150#if USE_VALGRIND 221#if CORO_USE_VALGRIND
151 int valgrind_id; 222 int valgrind_id;
152#endif 223#endif
224 unsigned char flags;
153} coro_cctx; 225} coro_cctx;
154 226
155enum { 227enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */ 228 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 229 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */ 230 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 231 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160}; 232};
161 233
162/* this is a structure representing a perl-level coroutine */ 234/* the structure where most of the perl state is stored, overlaid on the cxstack */
163struct coro { 235typedef struct
164 /* the c coroutine allocated to this perl coroutine, if any */ 236{
165 coro_cctx *cctx; 237 SV *defsv;
166 238 AV *defav;
167 /* data associated with this coroutine (initial args) */ 239 SV *errsv;
168 AV *args; 240 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; 241#define VAR(name,type) type name;
181# include "state.h" 242# include "state.h"
182#undef VAR 243#undef VAR
244} perl_slots;
245
246#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
247
248/* this is a structure representing a perl-level coroutine */
249struct coro {
250 /* the C coroutine allocated to this perl coroutine, if any */
251 coro_cctx *cctx;
252
253 /* state data */
254 struct CoroSLF slf_frame; /* saved slf frame */
255 AV *mainstack;
256 perl_slots *slot; /* basically the saved sp */
257
258 CV *startcv; /* the CV to execute */
259 AV *args; /* data associated with this coroutine (initial args) */
260 int refcnt; /* coroutines are refcounted, yes */
261 int flags; /* CF_ flags */
262 HV *hv; /* the perl hash associated with this coro, if any */
263 void (*on_destroy)(pTHX_ struct coro *coro);
264
265 /* statistics */
266 int usecount; /* number of transfers to this coro */
183 267
184 /* coro process data */ 268 /* coro process data */
185 int prio; 269 int prio;
270 SV *except; /* exception to be thrown */
271 SV *rouse_cb;
272
273 /* async_pool */
274 SV *saved_deffh;
275 SV *invoke_cb;
276 AV *invoke_av;
277
278 /* linked list */
279 struct coro *next, *prev;
186}; 280};
187 281
188typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
189typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
190 284
285/* the following variables are effectively part of the perl context */
286/* and get copied between struct coro and these variables */
287/* the mainr easonw e don't support windows process emulation */
288static struct CoroSLF slf_frame; /* the current slf frame */
289
290/** Coro ********************************************************************/
291
292#define PRIO_MAX 3
293#define PRIO_HIGH 1
294#define PRIO_NORMAL 0
295#define PRIO_LOW -1
296#define PRIO_IDLE -3
297#define PRIO_MIN -4
298
299/* for Coro.pm */
300static SV *coro_current;
301static SV *coro_readyhook;
302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303static CV *cv_coro_run, *cv_coro_terminate;
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
191static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339/* may croak */
340INLINE CV *
341coro_sv_2cv (pTHX_ SV *sv)
342{
343 HV *st;
344 GV *gvp;
345 return sv_2cv (sv, &st, &gvp, 0);
346}
347
348static AV *
192coro_clone_padlist (CV *cv) 349coro_clone_padlist (pTHX_ CV *cv)
193{ 350{
194 AV *padlist = CvPADLIST (cv); 351 AV *padlist = CvPADLIST (cv);
195 AV *newpadlist, *newpad; 352 AV *newpadlist, *newpad;
196 353
197 newpadlist = newAV (); 354 newpadlist = newAV ();
198 AvREAL_off (newpadlist); 355 AvREAL_off (newpadlist);
199#if PERL_VERSION_ATLEAST (5,9,0) 356#if PERL_VERSION_ATLEAST (5,10,0)
200 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 357 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
201#else 358#else
202 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 359 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
203#endif 360#endif
204 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 361 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
205 --AvFILLp (padlist); 362 --AvFILLp (padlist);
206 363
207 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 364 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
208 av_store (newpadlist, 1, (SV *)newpad); 365 av_store (newpadlist, 1, (SV *)newpad);
209 366
210 return newpadlist; 367 return newpadlist;
211} 368}
212 369
213static void 370static void
214free_padlist (AV *padlist) 371free_padlist (pTHX_ AV *padlist)
215{ 372{
216 /* may be during global destruction */ 373 /* may be during global destruction */
217 if (SvREFCNT (padlist)) 374 if (SvREFCNT (padlist))
218 { 375 {
219 I32 i = AvFILLp (padlist); 376 I32 i = AvFILLp (padlist);
… …
240 AV *padlist; 397 AV *padlist;
241 AV *av = (AV *)mg->mg_obj; 398 AV *av = (AV *)mg->mg_obj;
242 399
243 /* casting is fun. */ 400 /* casting is fun. */
244 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 401 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
245 free_padlist (padlist); 402 free_padlist (aTHX_ padlist);
246 403
247 SvREFCNT_dec (av); 404 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
248 405
249 return 0; 406 return 0;
250} 407}
251 408
409#define CORO_MAGIC_type_cv 26
252#define PERL_MAGIC_coro PERL_MAGIC_ext 410#define CORO_MAGIC_type_state PERL_MAGIC_ext
253 411
254static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 412static MGVTBL coro_cv_vtbl = {
413 0, 0, 0, 0,
414 coro_cv_free
415};
255 416
256#define CORO_MAGIC(cv) \ 417#define CORO_MAGIC_NN(sv, type) \
418 (expect_true (SvMAGIC (sv)->mg_type == type) \
257 SvMAGIC (cv) \ 419 ? SvMAGIC (sv) \
258 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 420 : mg_find (sv, type))
259 ? SvMAGIC (cv) \ 421
260 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 422#define CORO_MAGIC(sv, type) \
423 (expect_true (SvMAGIC (sv)) \
424 ? CORO_MAGIC_NN (sv, type) \
261 : 0 425 : 0)
426
427#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
428#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
429
430INLINE struct coro *
431SvSTATE_ (pTHX_ SV *coro)
432{
433 HV *stash;
434 MAGIC *mg;
435
436 if (SvROK (coro))
437 coro = SvRV (coro);
438
439 if (expect_false (SvTYPE (coro) != SVt_PVHV))
440 croak ("Coro::State object required");
441
442 stash = SvSTASH (coro);
443 if (expect_false (stash != coro_stash && stash != coro_state_stash))
444 {
445 /* very slow, but rare, check */
446 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
447 croak ("Coro::State object required");
448 }
449
450 mg = CORO_MAGIC_state (coro);
451 return (struct coro *)mg->mg_ptr;
452}
453
454#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
455
456/* faster than SvSTATE, but expects a coroutine hv */
457#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
458#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
262 459
263/* the next two functions merely cache the padlists */ 460/* the next two functions merely cache the padlists */
264static void 461static void
265get_padlist (CV *cv) 462get_padlist (pTHX_ CV *cv)
266{ 463{
267 MAGIC *mg = CORO_MAGIC (cv); 464 MAGIC *mg = CORO_MAGIC_cv (cv);
268 AV *av; 465 AV *av;
269 466
270 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 467 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
271 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 468 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
272 else 469 else
273 { 470 {
274#if PREFER_PERL_FUNCTIONS 471#if CORO_PREFER_PERL_FUNCTIONS
275 /* this is probably cleaner, but also slower? */ 472 /* this is probably cleaner? but also slower! */
473 /* in practise, it seems to be less stable */
276 CV *cp = Perl_cv_clone (cv); 474 CV *cp = Perl_cv_clone (aTHX_ cv);
277 CvPADLIST (cv) = CvPADLIST (cp); 475 CvPADLIST (cv) = CvPADLIST (cp);
278 CvPADLIST (cp) = 0; 476 CvPADLIST (cp) = 0;
279 SvREFCNT_dec (cp); 477 SvREFCNT_dec (cp);
280#else 478#else
281 CvPADLIST (cv) = coro_clone_padlist (cv); 479 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
282#endif 480#endif
283 } 481 }
284} 482}
285 483
286static void 484static void
287put_padlist (CV *cv) 485put_padlist (pTHX_ CV *cv)
288{ 486{
289 MAGIC *mg = CORO_MAGIC (cv); 487 MAGIC *mg = CORO_MAGIC_cv (cv);
290 AV *av; 488 AV *av;
291 489
292 if (!mg) 490 if (expect_false (!mg))
293 { 491 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
294 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
295 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296 mg->mg_virtual = &vtbl_coro;
297 mg->mg_obj = (SV *)newAV ();
298 }
299 492
300 av = (AV *)mg->mg_obj; 493 av = (AV *)mg->mg_obj;
301 494
302 if (AvFILLp (av) >= AvMAX (av)) 495 if (expect_false (AvFILLp (av) >= AvMAX (av)))
303 av_extend (av, AvMAX (av) + 1); 496 av_extend (av, AvMAX (av) + 1);
304 497
305 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 498 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306} 499}
307 500
308#define SB do { 501/** load & save, init *******************************************************/
309#define SE } while (0)
310 502
311#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
312
313static void 503static void
314load_perl (Coro__State c) 504load_perl (pTHX_ Coro__State c)
315{ 505{
506 perl_slots *slot = c->slot;
507 c->slot = 0;
508
509 PL_mainstack = c->mainstack;
510
511 GvSV (PL_defgv) = slot->defsv;
512 GvAV (PL_defgv) = slot->defav;
513 GvSV (PL_errgv) = slot->errsv;
514 GvSV (irsgv) = slot->irsgv;
515
316#define VAR(name,type) PL_ ## name = c->name; 516 #define VAR(name,type) PL_ ## name = slot->name;
317# include "state.h" 517 # include "state.h"
318#undef VAR 518 #undef VAR
319
320 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
321 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
322 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
323 if (c->irssv)
324 {
325 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
326 SvREFCNT_dec (c->irssv);
327 else
328 {
329 REPLACE_SV (PL_rs, c->irssv);
330 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
331 sv_setsv (c->irssv_sv, PL_rs);
332 }
333 }
334 519
335 { 520 {
336 dSP; 521 dSP;
522
337 CV *cv; 523 CV *cv;
338 524
339 /* now do the ugly restore mess */ 525 /* now do the ugly restore mess */
340 while ((cv = (CV *)POPs)) 526 while (expect_true (cv = (CV *)POPs))
341 { 527 {
342 put_padlist (cv); /* mark this padlist as available */ 528 put_padlist (aTHX_ cv); /* mark this padlist as available */
343 CvDEPTH (cv) = PTR2IV (POPs); 529 CvDEPTH (cv) = PTR2IV (POPs);
344 CvPADLIST (cv) = (AV *)POPs; 530 CvPADLIST (cv) = (AV *)POPs;
345 } 531 }
346 532
347 PUTBACK; 533 PUTBACK;
348 } 534 }
349}
350 535
536 slf_frame = c->slf_frame;
537 CORO_THROW = c->except;
538}
539
351static void 540static void
352save_perl (Coro__State c) 541save_perl (pTHX_ Coro__State c)
353{ 542{
543 c->except = CORO_THROW;
544 c->slf_frame = slf_frame;
545
354 { 546 {
355 dSP; 547 dSP;
356 I32 cxix = cxstack_ix; 548 I32 cxix = cxstack_ix;
357 PERL_CONTEXT *ccstk = cxstack; 549 PERL_CONTEXT *ccstk = cxstack;
358 PERL_SI *top_si = PL_curstackinfo; 550 PERL_SI *top_si = PL_curstackinfo;
… …
360 /* 552 /*
361 * the worst thing you can imagine happens first - we have to save 553 * the worst thing you can imagine happens first - we have to save
362 * (and reinitialize) all cv's in the whole callchain :( 554 * (and reinitialize) all cv's in the whole callchain :(
363 */ 555 */
364 556
365 EXTEND (SP, 3 + 1);
366 PUSHs (Nullsv); 557 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 558 /* this loop was inspired by pp_caller */
368 for (;;) 559 for (;;)
369 { 560 {
370 while (cxix >= 0) 561 while (expect_true (cxix >= 0))
371 { 562 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 563 PERL_CONTEXT *cx = &ccstk[cxix--];
373 564
374 if (CxTYPE (cx) == CXt_SUB) 565 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 566 {
376 CV *cv = cx->blk_sub.cv; 567 CV *cv = cx->blk_sub.cv;
377 568
378 if (CvDEPTH (cv)) 569 if (expect_true (CvDEPTH (cv)))
379 { 570 {
380 EXTEND (SP, 3); 571 EXTEND (SP, 3);
381 PUSHs ((SV *)CvPADLIST (cv)); 572 PUSHs ((SV *)CvPADLIST (cv));
382 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 573 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
383 PUSHs ((SV *)cv); 574 PUSHs ((SV *)cv);
384 575
385 CvDEPTH (cv) = 0; 576 CvDEPTH (cv) = 0;
386 get_padlist (cv); 577 get_padlist (aTHX_ cv);
387 } 578 }
388 } 579 }
389 } 580 }
390 581
391 if (top_si->si_type == PERLSI_MAIN) 582 if (expect_true (top_si->si_type == PERLSI_MAIN))
392 break; 583 break;
393 584
394 top_si = top_si->si_prev; 585 top_si = top_si->si_prev;
395 ccstk = top_si->si_cxstack; 586 ccstk = top_si->si_cxstack;
396 cxix = top_si->si_cxix; 587 cxix = top_si->si_cxix;
397 } 588 }
398 589
399 PUTBACK; 590 PUTBACK;
400 } 591 }
401 592
402 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 593 /* allocate some space on the context stack for our purposes */
403 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 594 /* we manually unroll here, as usually 2 slots is enough */
404 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 595 if (SLOT_COUNT >= 1) CXINC;
405 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 596 if (SLOT_COUNT >= 2) CXINC;
597 if (SLOT_COUNT >= 3) CXINC;
598 {
599 int i;
600 for (i = 3; i < SLOT_COUNT; ++i)
601 CXINC;
602 }
603 cxstack_ix -= SLOT_COUNT; /* undo allocation */
406 604
605 c->mainstack = PL_mainstack;
606
607 {
608 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
609
610 slot->defav = GvAV (PL_defgv);
611 slot->defsv = DEFSV;
612 slot->errsv = ERRSV;
613 slot->irsgv = GvSV (irsgv);
614
407#define VAR(name,type)c->name = PL_ ## name; 615 #define VAR(name,type) slot->name = PL_ ## name;
408# include "state.h" 616 # include "state.h"
409#undef VAR 617 #undef VAR
618 }
410} 619}
411 620
412/* 621/*
413 * allocate various perl stacks. This is an exact copy 622 * allocate various perl stacks. This is almost an exact copy
414 * of perl.c:init_stacks, except that it uses less memory 623 * of perl.c:init_stacks, except that it uses less memory
415 * on the (sometimes correct) assumption that coroutines do 624 * on the (sometimes correct) assumption that coroutines do
416 * not usually need a lot of stackspace. 625 * not usually need a lot of stackspace.
417 */ 626 */
418#if PREFER_PERL_FUNCTIONS 627#if CORO_PREFER_PERL_FUNCTIONS
419# define coro_init_stacks init_stacks 628# define coro_init_stacks(thx) init_stacks ()
420#else 629#else
421static void 630static void
422coro_init_stacks () 631coro_init_stacks (pTHX)
423{ 632{
424 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 633 PL_curstackinfo = new_stackinfo(32, 8);
425 PL_curstackinfo->si_type = PERLSI_MAIN; 634 PL_curstackinfo->si_type = PERLSI_MAIN;
426 PL_curstack = PL_curstackinfo->si_stack; 635 PL_curstack = PL_curstackinfo->si_stack;
427 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 636 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
428 637
429 PL_stack_base = AvARRAY(PL_curstack); 638 PL_stack_base = AvARRAY(PL_curstack);
430 PL_stack_sp = PL_stack_base; 639 PL_stack_sp = PL_stack_base;
431 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 640 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
432 641
433 New(50,PL_tmps_stack,128,SV*); 642 New(50,PL_tmps_stack,32,SV*);
434 PL_tmps_floor = -1; 643 PL_tmps_floor = -1;
435 PL_tmps_ix = -1; 644 PL_tmps_ix = -1;
436 PL_tmps_max = 128; 645 PL_tmps_max = 32;
437 646
438 New(54,PL_markstack,32,I32); 647 New(54,PL_markstack,16,I32);
439 PL_markstack_ptr = PL_markstack; 648 PL_markstack_ptr = PL_markstack;
440 PL_markstack_max = PL_markstack + 32; 649 PL_markstack_max = PL_markstack + 16;
441 650
442#ifdef SET_MARK_OFFSET 651#ifdef SET_MARK_OFFSET
443 SET_MARK_OFFSET; 652 SET_MARK_OFFSET;
444#endif 653#endif
445 654
446 New(54,PL_scopestack,32,I32); 655 New(54,PL_scopestack,8,I32);
447 PL_scopestack_ix = 0; 656 PL_scopestack_ix = 0;
448 PL_scopestack_max = 32; 657 PL_scopestack_max = 8;
449 658
450 New(54,PL_savestack,64,ANY); 659 New(54,PL_savestack,24,ANY);
451 PL_savestack_ix = 0; 660 PL_savestack_ix = 0;
452 PL_savestack_max = 64; 661 PL_savestack_max = 24;
453 662
454#if !PERL_VERSION_ATLEAST (5,9,0) 663#if !PERL_VERSION_ATLEAST (5,10,0)
455 New(54,PL_retstack,16,OP*); 664 New(54,PL_retstack,4,OP*);
456 PL_retstack_ix = 0; 665 PL_retstack_ix = 0;
457 PL_retstack_max = 16; 666 PL_retstack_max = 4;
458#endif 667#endif
459} 668}
460#endif 669#endif
461 670
462/* 671/*
463 * destroy the stacks, the callchain etc... 672 * destroy the stacks, the callchain etc...
464 */ 673 */
465static void 674static void
466coro_destroy_stacks () 675coro_destruct_stacks (pTHX)
467{ 676{
468 if (!IN_DESTRUCT)
469 {
470 /* restore all saved variables and stuff */
471 LEAVE_SCOPE (0);
472 assert (PL_tmps_floor == -1);
473
474 /* free all temporaries */
475 FREETMPS;
476 assert (PL_tmps_ix == -1);
477
478 /* unwind all extra stacks */
479 POPSTACK_TO (PL_mainstack);
480
481 /* unwind main stack */
482 dounwind (-1);
483 }
484
485 while (PL_curstackinfo->si_next) 677 while (PL_curstackinfo->si_next)
486 PL_curstackinfo = PL_curstackinfo->si_next; 678 PL_curstackinfo = PL_curstackinfo->si_next;
487 679
488 while (PL_curstackinfo) 680 while (PL_curstackinfo)
489 { 681 {
… …
499 691
500 Safefree (PL_tmps_stack); 692 Safefree (PL_tmps_stack);
501 Safefree (PL_markstack); 693 Safefree (PL_markstack);
502 Safefree (PL_scopestack); 694 Safefree (PL_scopestack);
503 Safefree (PL_savestack); 695 Safefree (PL_savestack);
504#if !PERL_VERSION_ATLEAST (5,9,0) 696#if !PERL_VERSION_ATLEAST (5,10,0)
505 Safefree (PL_retstack); 697 Safefree (PL_retstack);
506#endif 698#endif
507} 699}
508 700
701#define CORO_RSS \
702 rss += sizeof (SYM (curstackinfo)); \
703 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
705 rss += SYM (tmps_max) * sizeof (SV *); \
706 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
707 rss += SYM (scopestack_max) * sizeof (I32); \
708 rss += SYM (savestack_max) * sizeof (ANY);
709
710static size_t
711coro_rss (pTHX_ struct coro *coro)
712{
713 size_t rss = sizeof (*coro);
714
715 if (coro->mainstack)
716 {
717 if (coro->flags & CF_RUNNING)
718 {
719 #define SYM(sym) PL_ ## sym
720 CORO_RSS;
721 #undef SYM
722 }
723 else
724 {
725 #define SYM(sym) coro->slot->sym
726 CORO_RSS;
727 #undef SYM
728 }
729 }
730
731 return rss;
732}
733
734/** coroutine stack handling ************************************************/
735
736static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
737static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
739
740/* apparently < 5.8.8 */
741#ifndef MgPV_nolen_const
742#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
743 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
744 (const char*)(mg)->mg_ptr)
745#endif
746
747/*
748 * This overrides the default magic get method of %SIG elements.
749 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
750 * and instead of tryign to save and restore the hash elements, we just provide
751 * readback here.
752 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
753 * not expecting this to actually change the hook. This is a potential problem
754 * when a schedule happens then, but we ignore this.
755 */
509static void 756static int
510setup_coro (struct coro *coro) 757coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
758{
759 const char *s = MgPV_nolen_const (mg);
760
761 if (*s == '_')
762 {
763 SV **svp = 0;
764
765 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
766 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
767
768 if (svp)
769 {
770 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
771 return 0;
772 }
773 }
774
775 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
776}
777
778static int
779coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
780{
781 const char *s = MgPV_nolen_const (mg);
782
783 if (*s == '_')
784 {
785 SV **svp = 0;
786
787 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
788 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
789
790 if (svp)
791 {
792 SV *old = *svp;
793 *svp = 0;
794 SvREFCNT_dec (old);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = newSVsv (sv);
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
824}
825
826static void
827prepare_nop (pTHX_ struct coro_transfer_args *ta)
828{
829 /* kind of mega-hacky, but works */
830 ta->next = ta->prev = (struct coro *)ta;
831}
832
833static int
834slf_check_nop (pTHX_ struct CoroSLF *frame)
835{
836 return 0;
837}
838
839static UNOP coro_setup_op;
840
841static void NOINLINE /* noinline to keep it out of the transfer fast path */
842coro_setup (pTHX_ struct coro *coro)
511{ 843{
512 /* 844 /*
513 * emulate part of the perl startup here. 845 * emulate part of the perl startup here.
514 */ 846 */
515
516 coro_init_stacks (); 847 coro_init_stacks (aTHX);
517 848
849 PL_runops = RUNOPS_DEFAULT;
518 PL_curcop = &PL_compiling; 850 PL_curcop = &PL_compiling;
519 PL_in_eval = EVAL_NULL; 851 PL_in_eval = EVAL_NULL;
852 PL_comppad = 0;
520 PL_curpm = 0; 853 PL_curpm = 0;
854 PL_curpad = 0;
521 PL_localizing = 0; 855 PL_localizing = 0;
522 PL_dirty = 0; 856 PL_dirty = 0;
523 PL_restartop = 0; 857 PL_restartop = 0;
858#if PERL_VERSION_ATLEAST (5,10,0)
859 PL_parser = 0;
860#endif
861
862 /* recreate the die/warn hooks */
863 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
864 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
865
866 GvSV (PL_defgv) = newSV (0);
867 GvAV (PL_defgv) = coro->args; coro->args = 0;
868 GvSV (PL_errgv) = newSV (0);
869 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
870 PL_rs = newSVsv (GvSV (irsgv));
871 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
524 872
525 { 873 {
526 dSP; 874 dSP;
527 LOGOP myop; 875 UNOP myop;
528 876
529 SvREFCNT_dec (GvAV (PL_defgv));
530 GvAV (PL_defgv) = coro->args; coro->args = 0;
531
532 Zero (&myop, 1, LOGOP); 877 Zero (&myop, 1, UNOP);
533 myop.op_next = Nullop; 878 myop.op_next = Nullop;
879 myop.op_type = OP_ENTERSUB;
534 myop.op_flags = OPf_WANT_VOID; 880 myop.op_flags = OPf_WANT_VOID;
535 881
536 PUSHMARK (SP); 882 PUSHMARK (SP);
537 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 883 PUSHs ((SV *)coro->startcv);
538 PUTBACK; 884 PUTBACK;
539 PL_op = (OP *)&myop; 885 PL_op = (OP *)&myop;
540 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 886 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
541 SPAGAIN;
542 } 887 }
543 888
544 ENTER; /* necessary e.g. for dounwind */ 889 /* this newly created coroutine might be run on an existing cctx which most
545} 890 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
891 */
892 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
893 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
546 894
895 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
896 coro_setup_op.op_next = PL_op;
897 coro_setup_op.op_type = OP_CUSTOM;
898 coro_setup_op.op_ppaddr = pp_slf;
899 /* no flags etc. required, as an init function won't be called */
900
901 PL_op = (OP *)&coro_setup_op;
902
903 /* copy throw, in case it was set before coro_setup */
904 CORO_THROW = coro->except;
905}
906
547static void 907static void
908coro_destruct (pTHX_ struct coro *coro)
909{
910 if (!IN_DESTRUCT)
911 {
912 /* restore all saved variables and stuff */
913 LEAVE_SCOPE (0);
914 assert (PL_tmps_floor == -1);
915
916 /* free all temporaries */
917 FREETMPS;
918 assert (PL_tmps_ix == -1);
919
920 /* unwind all extra stacks */
921 POPSTACK_TO (PL_mainstack);
922
923 /* unwind main stack */
924 dounwind (-1);
925 }
926
927 SvREFCNT_dec (GvSV (PL_defgv));
928 SvREFCNT_dec (GvAV (PL_defgv));
929 SvREFCNT_dec (GvSV (PL_errgv));
930 SvREFCNT_dec (PL_defoutgv);
931 SvREFCNT_dec (PL_rs);
932 SvREFCNT_dec (GvSV (irsgv));
933
934 SvREFCNT_dec (PL_diehook);
935 SvREFCNT_dec (PL_warnhook);
936
937 SvREFCNT_dec (coro->saved_deffh);
938 SvREFCNT_dec (coro->rouse_cb);
939 SvREFCNT_dec (coro->invoke_cb);
940 SvREFCNT_dec (coro->invoke_av);
941
942 coro_destruct_stacks (aTHX);
943}
944
945INLINE void
548free_coro_mortal () 946free_coro_mortal (pTHX)
549{ 947{
550 if (coro_mortal) 948 if (expect_true (coro_mortal))
551 { 949 {
552 SvREFCNT_dec (coro_mortal); 950 SvREFCNT_dec (coro_mortal);
553 coro_mortal = 0; 951 coro_mortal = 0;
554 } 952 }
555} 953}
556 954
557/* inject a fake call to Coro::State::_cctx_init into the execution */ 955static int
956runops_trace (pTHX)
957{
958 COP *oldcop = 0;
959 int oldcxix = -2;
960 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
961 coro_cctx *cctx = coro->cctx;
962
963 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
964 {
965 PERL_ASYNC_CHECK ();
966
967 if (cctx->flags & CC_TRACE_ALL)
968 {
969 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
970 {
971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
972 SV **bot, **top;
973 AV *av = newAV (); /* return values */
974 SV **cb;
975 dSP;
976
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979 if (isGV (gv))
980 gv_efullname3 (fullname, gv, 0);
981
982 bot = PL_stack_base + cx->blk_oldsp + 1;
983 top = cx->blk_gimme == G_ARRAY ? SP + 1
984 : cx->blk_gimme == G_SCALAR ? bot + 1
985 : bot;
986
987 av_extend (av, top - bot);
988 while (bot < top)
989 av_push (av, SvREFCNT_inc_NN (*bot++));
990
991 PL_runops = RUNOPS_DEFAULT;
992 ENTER;
993 SAVETMPS;
994 EXTEND (SP, 3);
995 PUSHMARK (SP);
996 PUSHs (&PL_sv_no);
997 PUSHs (fullname);
998 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
999 PUTBACK;
1000 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1001 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1002 SPAGAIN;
1003 FREETMPS;
1004 LEAVE;
1005 PL_runops = runops_trace;
1006 }
1007
1008 if (oldcop != PL_curcop)
1009 {
1010 oldcop = PL_curcop;
1011
1012 if (PL_curcop != &PL_compiling)
1013 {
1014 SV **cb;
1015
1016 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1017 {
1018 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1019
1020 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1021 {
1022 runops_proc_t old_runops = PL_runops;
1023 dSP;
1024 GV *gv = CvGV (cx->blk_sub.cv);
1025 SV *fullname = sv_2mortal (newSV (0));
1026
1027 if (isGV (gv))
1028 gv_efullname3 (fullname, gv, 0);
1029
1030 PL_runops = RUNOPS_DEFAULT;
1031 ENTER;
1032 SAVETMPS;
1033 EXTEND (SP, 3);
1034 PUSHMARK (SP);
1035 PUSHs (&PL_sv_yes);
1036 PUSHs (fullname);
1037 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1038 PUTBACK;
1039 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1040 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1041 SPAGAIN;
1042 FREETMPS;
1043 LEAVE;
1044 PL_runops = runops_trace;
1045 }
1046
1047 oldcxix = cxstack_ix;
1048 }
1049
1050 if (cctx->flags & CC_TRACE_LINE)
1051 {
1052 dSP;
1053
1054 PL_runops = RUNOPS_DEFAULT;
1055 ENTER;
1056 SAVETMPS;
1057 EXTEND (SP, 3);
1058 PL_runops = RUNOPS_DEFAULT;
1059 PUSHMARK (SP);
1060 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1061 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1062 PUTBACK;
1063 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1064 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1065 SPAGAIN;
1066 FREETMPS;
1067 LEAVE;
1068 PL_runops = runops_trace;
1069 }
1070 }
1071 }
1072 }
1073 }
1074
1075 TAINT_NOT;
1076 return 0;
1077}
1078
1079static struct coro_cctx *cctx_ssl_cctx;
1080static struct CoroSLF cctx_ssl_frame;
1081
1082static void
1083slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1084{
1085 ta->prev = (struct coro *)cctx_ssl_cctx;
1086 ta->next = 0;
1087}
1088
1089static int
1090slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1091{
1092 *frame = cctx_ssl_frame;
1093
1094 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1095}
1096
1097/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
558static void NOINLINE 1098static void NOINLINE
559prepare_cctx (coro_cctx *cctx) 1099cctx_prepare (pTHX_ coro_cctx *cctx)
560{ 1100{
561 dSP;
562 LOGOP myop;
563
564 Zero (&myop, 1, LOGOP);
565 myop.op_next = PL_op;
566 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
567
568 PUSHMARK (SP);
569 EXTEND (SP, 2);
570 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
571 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
572 PUTBACK;
573 PL_op = (OP *)&myop;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN;
576}
577
578static void
579coro_run (void *arg)
580{
581 /* coro_run is the alternative tail of transfer(), so unlock here. */
582 UNLOCK;
583
584 /*
585 * this is a _very_ stripped down perl interpreter ;)
586 */
587 PL_top_env = &PL_start_env; 1101 PL_top_env = &PL_start_env;
588 1102
1103 if (cctx->flags & CC_TRACE)
1104 PL_runops = runops_trace;
1105
1106 /* we already must be executing an SLF op, there is no other valid way
1107 * that can lead to creation of a new cctx */
1108 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1109 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1110
1111 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1112 cctx_ssl_cctx = cctx;
1113 cctx_ssl_frame = slf_frame;
1114
1115 slf_frame.prepare = slf_prepare_set_stacklevel;
1116 slf_frame.check = slf_check_set_stacklevel;
1117}
1118
1119/* the tail of transfer: execute stuff we can only do after a transfer */
1120INLINE void
1121transfer_tail (pTHX)
1122{
1123 free_coro_mortal (aTHX);
1124}
1125
1126/*
1127 * this is a _very_ stripped down perl interpreter ;)
1128 */
1129static void
1130cctx_run (void *arg)
1131{
1132#ifdef USE_ITHREADS
1133# if CORO_PTHREAD
1134 PERL_SET_CONTEXT (coro_thx);
1135# endif
1136#endif
1137 {
1138 dTHX;
1139
1140 /* normally we would need to skip the entersub here */
1141 /* not doing so will re-execute it, which is exactly what we want */
1142 /* PL_nop = PL_nop->op_next */
1143
589 /* inject call to cctx_init */ 1144 /* inject a fake subroutine call to cctx_init */
590 prepare_cctx ((coro_cctx *)arg); 1145 cctx_prepare (aTHX_ (coro_cctx *)arg);
591 1146
1147 /* cctx_run is the alternative tail of transfer() */
1148 transfer_tail (aTHX);
1149
592 /* somebody will hit me for both perl_run and PL_restartop */ 1150 /* somebody or something will hit me for both perl_run and PL_restartop */
593 PL_restartop = PL_op; 1151 PL_restartop = PL_op;
594 perl_run (PL_curinterp); 1152 perl_run (PL_curinterp);
1153 /*
1154 * Unfortunately, there is no way to get at the return values of the
1155 * coro body here, as perl_run destroys these
1156 */
595 1157
596 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1158 /*
597 abort (); 1159 * If perl-run returns we assume exit() was being called or the coro
1160 * fell off the end, which seems to be the only valid (non-bug)
1161 * reason for perl_run to return. We try to exit by jumping to the
1162 * bootstrap-time "top" top_env, as we cannot restore the "main"
1163 * coroutine as Coro has no such concept
1164 */
1165 PL_top_env = main_top_env;
1166 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1167 }
598} 1168}
599 1169
600static coro_cctx * 1170static coro_cctx *
601cctx_new () 1171cctx_new ()
602{ 1172{
603 coro_cctx *cctx; 1173 coro_cctx *cctx;
604 1174
605 ++cctx_count; 1175 ++cctx_count;
606
607 Newz (0, cctx, 1, coro_cctx); 1176 New (0, cctx, 1, coro_cctx);
1177
1178 cctx->gen = cctx_gen;
1179 cctx->flags = 0;
1180 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1181
1182 return cctx;
1183}
1184
1185/* create a new cctx only suitable as source */
1186static coro_cctx *
1187cctx_new_empty ()
1188{
1189 coro_cctx *cctx = cctx_new ();
1190
1191 cctx->sptr = 0;
1192 coro_create (&cctx->cctx, 0, 0, 0, 0);
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx suitable as destination/running a perl interpreter */
1198static coro_cctx *
1199cctx_new_run ()
1200{
1201 coro_cctx *cctx = cctx_new ();
1202 void *stack_start;
1203 size_t stack_size;
608 1204
609#if HAVE_MMAP 1205#if HAVE_MMAP
610
611 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1206 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
612 /* mmap supposedly does allocate-on-write for us */ 1207 /* mmap supposedly does allocate-on-write for us */
613 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1208 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614 1209
615 if (cctx->sptr == (void *)-1) 1210 if (cctx->sptr != (void *)-1)
1211 {
1212 #if CORO_STACKGUARD
1213 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1214 #endif
1215 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1216 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1217 cctx->flags |= CC_MAPPED;
616 { 1218 }
1219 else
1220#endif
1221 {
1222 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1223 New (0, cctx->sptr, cctx_stacksize, long);
1224
1225 if (!cctx->sptr)
1226 {
617 perror ("FATAL: unable to mmap stack for coroutine"); 1227 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
618 _exit (EXIT_FAILURE); 1228 _exit (EXIT_FAILURE);
619 } 1229 }
620 1230
621# if STACKGUARD 1231 stack_start = cctx->sptr;
622 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1232 stack_size = cctx->ssize;
623# endif
624
625#else
626
627 cctx->ssize = STACKSIZE * (long)sizeof (long);
628 New (0, cctx->sptr, STACKSIZE, long);
629
630 if (!cctx->sptr)
631 { 1233 }
632 perror ("FATAL: unable to malloc stack for coroutine");
633 _exit (EXIT_FAILURE);
634 }
635 1234
1235 #if CORO_USE_VALGRIND
1236 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
636#endif 1237 #endif
637 1238
638#if USE_VALGRIND 1239 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
639 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
640 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
641 cctx->ssize + (char *)cctx->sptr
642 );
643#endif
644
645 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
646 1240
647 return cctx; 1241 return cctx;
648} 1242}
649 1243
650static void 1244static void
… …
652{ 1246{
653 if (!cctx) 1247 if (!cctx)
654 return; 1248 return;
655 1249
656 --cctx_count; 1250 --cctx_count;
1251 coro_destroy (&cctx->cctx);
657 1252
658#if USE_VALGRIND 1253 /* coro_transfer creates new, empty cctx's */
1254 if (cctx->sptr)
1255 {
1256 #if CORO_USE_VALGRIND
659 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1257 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
660#endif 1258 #endif
661 1259
662#if HAVE_MMAP 1260#if HAVE_MMAP
1261 if (cctx->flags & CC_MAPPED)
663 munmap (cctx->sptr, cctx->ssize); 1262 munmap (cctx->sptr, cctx->ssize);
664#else 1263 else
1264#endif
665 Safefree (cctx->sptr); 1265 Safefree (cctx->sptr);
666#endif 1266 }
667 1267
668 Safefree (cctx); 1268 Safefree (cctx);
669} 1269}
670 1270
1271/* wether this cctx should be destructed */
1272#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1273
671static coro_cctx * 1274static coro_cctx *
672cctx_get () 1275cctx_get (pTHX)
673{ 1276{
674 coro_cctx *cctx; 1277 while (expect_true (cctx_first))
675
676 if (cctx_first)
677 { 1278 {
678 cctx = cctx_first; 1279 coro_cctx *cctx = cctx_first;
679 cctx_first = cctx->next; 1280 cctx_first = cctx->next;
680 --cctx_idle; 1281 --cctx_idle;
681 } 1282
682 else 1283 if (expect_true (!CCTX_EXPIRED (cctx)))
683 { 1284 return cctx;
684 cctx = cctx_new (); 1285
685 PL_op = PL_op->op_next; 1286 cctx_destroy (cctx);
686 } 1287 }
687 1288
688 return cctx; 1289 return cctx_new_run ();
689} 1290}
690 1291
691static void 1292static void
692cctx_put (coro_cctx *cctx) 1293cctx_put (coro_cctx *cctx)
693{ 1294{
1295 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1296
694 /* free another cctx if overlimit */ 1297 /* free another cctx if overlimit */
695 if (cctx_idle >= MAX_IDLE_CCTX) 1298 if (expect_false (cctx_idle >= cctx_max_idle))
696 { 1299 {
697 coro_cctx *first = cctx_first; 1300 coro_cctx *first = cctx_first;
698 cctx_first = first->next; 1301 cctx_first = first->next;
699 --cctx_idle; 1302 --cctx_idle;
700 1303
701 assert (!first->inuse);
702 cctx_destroy (first); 1304 cctx_destroy (first);
703 } 1305 }
704 1306
705 ++cctx_idle; 1307 ++cctx_idle;
706 cctx->next = cctx_first; 1308 cctx->next = cctx_first;
707 cctx_first = cctx; 1309 cctx_first = cctx;
708} 1310}
709 1311
710/* never call directly, always through the coro_state_transfer global variable */ 1312/** coroutine switching *****************************************************/
711static void NOINLINE 1313
1314static void
712transfer (struct coro *prev, struct coro *next) 1315transfer_check (pTHX_ struct coro *prev, struct coro *next)
1316{
1317 /* TODO: throwing up here is considered harmful */
1318
1319 if (expect_true (prev != next))
1320 {
1321 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1322 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1323
1324 if (expect_false (next->flags & CF_RUNNING))
1325 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1326
1327 if (expect_false (next->flags & CF_DESTROYED))
1328 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1329
1330#if !PERL_VERSION_ATLEAST (5,10,0)
1331 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1332 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1333#endif
1334 }
1335}
1336
1337/* always use the TRANSFER macro */
1338static void NOINLINE /* noinline so we have a fixed stackframe */
1339transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
713{ 1340{
714 dSTACKLEVEL; 1341 dSTACKLEVEL;
715 1342
716 /* sometimes transfer is only called to set idle_sp */ 1343 /* sometimes transfer is only called to set idle_sp */
717 if (!next) 1344 if (expect_false (!next))
718 { 1345 {
719 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1346 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
720 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1347 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
721 } 1348 }
722 else if (prev != next) 1349 else if (expect_true (prev != next))
723 { 1350 {
724 coro_cctx *prev__cctx; 1351 coro_cctx *prev__cctx;
725 1352
726 if (prev->flags & CF_NEW) 1353 if (expect_false (prev->flags & CF_NEW))
727 { 1354 {
728 /* create a new empty context */ 1355 /* create a new empty/source context */
729 Newz (0, prev->cctx, 1, coro_cctx); 1356 prev->cctx = cctx_new_empty ();
730 prev->cctx->inuse = 1;
731 prev->flags &= ~CF_NEW; 1357 prev->flags &= ~CF_NEW;
732 prev->flags |= CF_RUNNING; 1358 prev->flags |= CF_RUNNING;
733 } 1359 }
734 1360
735 /*TODO: must not croak here */
736 if (!prev->flags & CF_RUNNING)
737 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
738
739 if (next->flags & CF_RUNNING)
740 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
741
742 if (next->flags & CF_DESTROYED)
743 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
744
745 prev->flags &= ~CF_RUNNING; 1361 prev->flags &= ~CF_RUNNING;
746 next->flags |= CF_RUNNING; 1362 next->flags |= CF_RUNNING;
747 1363
748 LOCK; 1364 /* first get rid of the old state */
1365 save_perl (aTHX_ prev);
749 1366
750 if (next->flags & CF_NEW) 1367 if (expect_false (next->flags & CF_NEW))
751 { 1368 {
752 /* need to start coroutine */ 1369 /* need to start coroutine */
753 next->flags &= ~CF_NEW; 1370 next->flags &= ~CF_NEW;
754 /* first get rid of the old state */
755 save_perl (prev);
756 /* setup coroutine call */ 1371 /* setup coroutine call */
757 setup_coro (next); 1372 coro_setup (aTHX_ next);
758 /* need a new stack */
759 assert (!next->cctx);
760 } 1373 }
761 else 1374 else
1375 load_perl (aTHX_ next);
1376
1377 prev__cctx = prev->cctx;
1378
1379 /* possibly untie and reuse the cctx */
1380 if (expect_true (
1381 prev__cctx->idle_sp == STACKLEVEL
1382 && !(prev__cctx->flags & CC_TRACE)
1383 && !force_cctx
1384 ))
762 { 1385 {
763 /* coroutine already started */ 1386 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
764 save_perl (prev); 1387 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
765 load_perl (next); 1388
1389 prev->cctx = 0;
1390
1391 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1392 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1393 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1394 if (!next->cctx)
1395 next->cctx = cctx_get (aTHX);
1396
1397 cctx_put (prev__cctx);
766 } 1398 }
767 1399
768 prev__cctx = prev->cctx; 1400 ++next->usecount;
769 1401
770 /* possibly "free" the cctx */
771 if (prev__cctx->idle_sp == STACKLEVEL)
772 {
773 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
774 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
775
776 prev->cctx = 0;
777
778 cctx_put (prev__cctx);
779 prev__cctx->inuse = 0;
780 }
781
782 if (!next->cctx) 1402 if (expect_true (!next->cctx))
783 {
784 next->cctx = cctx_get (); 1403 next->cctx = cctx_get (aTHX);
785 assert (!next->cctx->inuse);
786 next->cctx->inuse = 1;
787 }
788 1404
789 if (prev__cctx != next->cctx) 1405 if (expect_false (prev__cctx != next->cctx))
790 { 1406 {
791 prev__cctx->top_env = PL_top_env; 1407 prev__cctx->top_env = PL_top_env;
792 PL_top_env = next->cctx->top_env; 1408 PL_top_env = next->cctx->top_env;
793 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1409 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
794 } 1410 }
795 1411
796 free_coro_mortal (); 1412 transfer_tail (aTHX);
797 UNLOCK;
798 } 1413 }
799} 1414}
800 1415
801struct transfer_args 1416#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
802{
803 struct coro *prev, *next;
804};
805
806#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1417#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1418
1419/** high level stuff ********************************************************/
807 1420
808static int 1421static int
809coro_state_destroy (struct coro *coro) 1422coro_state_destroy (pTHX_ struct coro *coro)
810{ 1423{
811 if (coro->flags & CF_DESTROYED) 1424 if (coro->flags & CF_DESTROYED)
812 return 0; 1425 return 0;
813 1426
1427 if (coro->on_destroy)
1428 coro->on_destroy (aTHX_ coro);
1429
814 coro->flags |= CF_DESTROYED; 1430 coro->flags |= CF_DESTROYED;
1431
1432 if (coro->flags & CF_READY)
1433 {
1434 /* reduce nready, as destroying a ready coro effectively unreadies it */
1435 /* alternative: look through all ready queues and remove the coro */
1436 --coro_nready;
1437 }
1438 else
1439 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
815 1440
816 if (coro->mainstack && coro->mainstack != main_mainstack) 1441 if (coro->mainstack && coro->mainstack != main_mainstack)
817 { 1442 {
818 assert (!(coro->flags & CF_RUNNING));
819
820 struct coro temp; 1443 struct coro temp;
821 Zero (&temp, 1, struct coro);
822 temp.save = CORO_SAVE_ALL;
823 1444
824 if (coro->flags & CF_RUNNING) 1445 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
825 croak ("FATAL: tried to destroy currently running coroutine");
826 1446
827 save_perl (&temp); 1447 save_perl (aTHX_ &temp);
828 load_perl (coro); 1448 load_perl (aTHX_ coro);
829 1449
830 coro_destroy_stacks (); 1450 coro_destruct (aTHX_ coro);
831 1451
832 load_perl (&temp); /* this will get rid of defsv etc.. */ 1452 load_perl (aTHX_ &temp);
833 1453
834 coro->mainstack = 0; 1454 coro->slot = 0;
835 } 1455 }
836 1456
837 cctx_destroy (coro->cctx); 1457 cctx_destroy (coro->cctx);
1458 SvREFCNT_dec (coro->startcv);
838 SvREFCNT_dec (coro->args); 1459 SvREFCNT_dec (coro->args);
1460 SvREFCNT_dec (CORO_THROW);
1461
1462 if (coro->next) coro->next->prev = coro->prev;
1463 if (coro->prev) coro->prev->next = coro->next;
1464 if (coro == coro_first) coro_first = coro->next;
839 1465
840 return 1; 1466 return 1;
841} 1467}
842 1468
843static int 1469static int
844coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1470coro_state_free (pTHX_ SV *sv, MAGIC *mg)
845{ 1471{
846 struct coro *coro = (struct coro *)mg->mg_ptr; 1472 struct coro *coro = (struct coro *)mg->mg_ptr;
847 mg->mg_ptr = 0; 1473 mg->mg_ptr = 0;
848 1474
1475 coro->hv = 0;
1476
849 if (--coro->refcnt < 0) 1477 if (--coro->refcnt < 0)
850 { 1478 {
851 coro_state_destroy (coro); 1479 coro_state_destroy (aTHX_ coro);
852 Safefree (coro); 1480 Safefree (coro);
853 } 1481 }
854 1482
855 return 0; 1483 return 0;
856} 1484}
… …
874#else 1502#else
875# define MGf_DUP 0 1503# define MGf_DUP 0
876#endif 1504#endif
877}; 1505};
878 1506
879static struct coro *
880SvSTATE (SV *coro)
881{
882 HV *stash;
883 MAGIC *mg;
884
885 if (SvROK (coro))
886 coro = SvRV (coro);
887
888 stash = SvSTASH (coro);
889 if (stash != coro_stash && stash != coro_state_stash)
890 {
891 /* very slow, but rare, check */
892 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
893 croak ("Coro::State object required");
894 }
895
896 mg = SvMAGIC (coro);
897 assert (mg->mg_type == PERL_MAGIC_ext);
898 return (struct coro *)mg->mg_ptr;
899}
900
901static void 1507static void
902prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1508prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
903{ 1509{
904 ta->prev = SvSTATE (prev_sv); 1510 ta->prev = SvSTATE (prev_sv);
905 ta->next = SvSTATE (next_sv); 1511 ta->next = SvSTATE (next_sv);
1512 TRANSFER_CHECK (*ta);
906} 1513}
907 1514
908static void 1515static void
909api_transfer (SV *prev_sv, SV *next_sv) 1516api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
910{ 1517{
911 struct transfer_args ta; 1518 struct coro_transfer_args ta;
912 1519
913 prepare_transfer (&ta, prev_sv, next_sv); 1520 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
914 TRANSFER (ta); 1521 TRANSFER (ta, 1);
1522}
1523
1524/*****************************************************************************/
1525/* gensub: simple closure generation utility */
1526
1527#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1528
1529/* create a closure from XS, returns a code reference */
1530/* the arg can be accessed via GENSUB_ARG from the callback */
1531/* the callback must use dXSARGS/XSRETURN */
1532static SV *
1533gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1534{
1535 CV *cv = (CV *)newSV (0);
1536
1537 sv_upgrade ((SV *)cv, SVt_PVCV);
1538
1539 CvANON_on (cv);
1540 CvISXSUB_on (cv);
1541 CvXSUB (cv) = xsub;
1542 GENSUB_ARG = arg;
1543
1544 return newRV_noinc ((SV *)cv);
1545}
1546
1547/** Coro ********************************************************************/
1548
1549INLINE void
1550coro_enq (pTHX_ struct coro *coro)
1551{
1552 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1553}
1554
1555INLINE SV *
1556coro_deq (pTHX)
1557{
1558 int prio;
1559
1560 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1561 if (AvFILLp (coro_ready [prio]) >= 0)
1562 return av_shift (coro_ready [prio]);
1563
1564 return 0;
915} 1565}
916 1566
917static int 1567static int
918api_save (SV *coro_sv, int new_save)
919{
920 struct coro *coro = SvSTATE (coro_sv);
921 int old_save = coro->save;
922
923 if (new_save >= 0)
924 coro->save = new_save;
925
926 return old_save;
927}
928
929/** Coro ********************************************************************/
930
931#define PRIO_MAX 3
932#define PRIO_HIGH 1
933#define PRIO_NORMAL 0
934#define PRIO_LOW -1
935#define PRIO_IDLE -3
936#define PRIO_MIN -4
937
938/* for Coro.pm */
939static SV *coro_current;
940static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
941static int coro_nready;
942
943static void
944coro_enq (SV *coro_sv)
945{
946 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
947 coro_nready++;
948}
949
950static SV *
951coro_deq (int min_prio)
952{
953 int prio = PRIO_MAX - PRIO_MIN;
954
955 min_prio -= PRIO_MIN;
956 if (min_prio < 0)
957 min_prio = 0;
958
959 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
960 if (AvFILLp (coro_ready [prio]) >= 0)
961 {
962 coro_nready--;
963 return av_shift (coro_ready [prio]);
964 }
965
966 return 0;
967}
968
969static int
970api_ready (SV *coro_sv) 1568api_ready (pTHX_ SV *coro_sv)
971{ 1569{
972 struct coro *coro; 1570 struct coro *coro;
1571 SV *sv_hook;
1572 void (*xs_hook)(void);
973 1573
974 if (SvROK (coro_sv)) 1574 if (SvROK (coro_sv))
975 coro_sv = SvRV (coro_sv); 1575 coro_sv = SvRV (coro_sv);
976 1576
977 coro = SvSTATE (coro_sv); 1577 coro = SvSTATE (coro_sv);
… …
979 if (coro->flags & CF_READY) 1579 if (coro->flags & CF_READY)
980 return 0; 1580 return 0;
981 1581
982 coro->flags |= CF_READY; 1582 coro->flags |= CF_READY;
983 1583
984 LOCK; 1584 sv_hook = coro_nready ? 0 : coro_readyhook;
985 coro_enq (SvREFCNT_inc (coro_sv)); 1585 xs_hook = coro_nready ? 0 : coroapi.readyhook;
986 UNLOCK; 1586
1587 coro_enq (aTHX_ coro);
1588 ++coro_nready;
1589
1590 if (sv_hook)
1591 {
1592 dSP;
1593
1594 ENTER;
1595 SAVETMPS;
1596
1597 PUSHMARK (SP);
1598 PUTBACK;
1599 call_sv (sv_hook, G_VOID | G_DISCARD);
1600
1601 FREETMPS;
1602 LEAVE;
1603 }
1604
1605 if (xs_hook)
1606 xs_hook ();
987 1607
988 return 1; 1608 return 1;
989} 1609}
990 1610
991static int 1611static int
992api_is_ready (SV *coro_sv) 1612api_is_ready (pTHX_ SV *coro_sv)
993{ 1613{
994 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1614 return !!(SvSTATE (coro_sv)->flags & CF_READY);
995} 1615}
996 1616
1617/* expects to own a reference to next->hv */
1618INLINE void
1619prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1620{
1621 SV *prev_sv = SvRV (coro_current);
1622
1623 ta->prev = SvSTATE_hv (prev_sv);
1624 ta->next = next;
1625
1626 TRANSFER_CHECK (*ta);
1627
1628 SvRV_set (coro_current, (SV *)next->hv);
1629
1630 free_coro_mortal (aTHX);
1631 coro_mortal = prev_sv;
1632}
1633
997static void 1634static void
998prepare_schedule (struct transfer_args *ta) 1635prepare_schedule (pTHX_ struct coro_transfer_args *ta)
999{ 1636{
1000 SV *prev_sv, *next_sv;
1001
1002 for (;;) 1637 for (;;)
1003 { 1638 {
1004 LOCK;
1005 next_sv = coro_deq (PRIO_MIN); 1639 SV *next_sv = coro_deq (aTHX);
1006 UNLOCK;
1007 1640
1641 if (expect_true (next_sv))
1642 {
1643 struct coro *next = SvSTATE_hv (next_sv);
1644
1645 /* cannot transfer to destroyed coros, skip and look for next */
1646 if (expect_false (next->flags & CF_DESTROYED))
1647 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1648 else
1649 {
1650 next->flags &= ~CF_READY;
1651 --coro_nready;
1652
1653 return prepare_schedule_to (aTHX_ ta, next);
1654 }
1655 }
1656 else
1657 {
1008 /* nothing to schedule: call the idle handler */ 1658 /* nothing to schedule: call the idle handler */
1009 if (!next_sv) 1659 dSP;
1660
1661 ENTER;
1662 SAVETMPS;
1663
1664 PUSHMARK (SP);
1665 PUTBACK;
1666 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1667
1668 FREETMPS;
1669 LEAVE;
1670 }
1671 }
1672}
1673
1674INLINE void
1675prepare_cede (pTHX_ struct coro_transfer_args *ta)
1676{
1677 api_ready (aTHX_ coro_current);
1678 prepare_schedule (aTHX_ ta);
1679}
1680
1681INLINE void
1682prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1683{
1684 SV *prev = SvRV (coro_current);
1685
1686 if (coro_nready)
1687 {
1688 prepare_schedule (aTHX_ ta);
1689 api_ready (aTHX_ prev);
1690 }
1691 else
1692 prepare_nop (aTHX_ ta);
1693}
1694
1695static void
1696api_schedule (pTHX)
1697{
1698 struct coro_transfer_args ta;
1699
1700 prepare_schedule (aTHX_ &ta);
1701 TRANSFER (ta, 1);
1702}
1703
1704static void
1705api_schedule_to (pTHX_ SV *coro_sv)
1706{
1707 struct coro_transfer_args ta;
1708 struct coro *next = SvSTATE (coro_sv);
1709
1710 SvREFCNT_inc_NN (coro_sv);
1711 prepare_schedule_to (aTHX_ &ta, next);
1712}
1713
1714static int
1715api_cede (pTHX)
1716{
1717 struct coro_transfer_args ta;
1718
1719 prepare_cede (aTHX_ &ta);
1720
1721 if (expect_true (ta.prev != ta.next))
1722 {
1723 TRANSFER (ta, 1);
1724 return 1;
1725 }
1726 else
1727 return 0;
1728}
1729
1730static int
1731api_cede_notself (pTHX)
1732{
1733 if (coro_nready)
1734 {
1735 struct coro_transfer_args ta;
1736
1737 prepare_cede_notself (aTHX_ &ta);
1738 TRANSFER (ta, 1);
1739 return 1;
1740 }
1741 else
1742 return 0;
1743}
1744
1745static void
1746api_trace (pTHX_ SV *coro_sv, int flags)
1747{
1748 struct coro *coro = SvSTATE (coro_sv);
1749
1750 if (flags & CC_TRACE)
1751 {
1752 if (!coro->cctx)
1753 coro->cctx = cctx_new_run ();
1754 else if (!(coro->cctx->flags & CC_TRACE))
1755 croak ("cannot enable tracing on coroutine with custom stack,");
1756
1757 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1758 }
1759 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1760 {
1761 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1762
1763 if (coro->flags & CF_RUNNING)
1764 PL_runops = RUNOPS_DEFAULT;
1765 else
1766 coro->slot->runops = RUNOPS_DEFAULT;
1767 }
1768}
1769
1770/*****************************************************************************/
1771/* async pool handler */
1772
1773static int
1774slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1775{
1776 HV *hv = (HV *)SvRV (coro_current);
1777 struct coro *coro = (struct coro *)frame->data;
1778
1779 if (!coro->invoke_cb)
1780 return 1; /* loop till we have invoke */
1781 else
1782 {
1783 hv_store (hv, "desc", sizeof ("desc") - 1,
1784 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1785
1786 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1787
1788 {
1789 dSP;
1790 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1791 PUTBACK;
1792 }
1793
1794 SvREFCNT_dec (GvAV (PL_defgv));
1795 GvAV (PL_defgv) = coro->invoke_av;
1796 coro->invoke_av = 0;
1797
1798 return 0;
1799 }
1800}
1801
1802static void
1803slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1804{
1805 HV *hv = (HV *)SvRV (coro_current);
1806 struct coro *coro = SvSTATE_hv ((SV *)hv);
1807
1808 if (expect_true (coro->saved_deffh))
1809 {
1810 /* subsequent iteration */
1811 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1812 coro->saved_deffh = 0;
1813
1814 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1815 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1816 {
1817 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1818 coro->invoke_av = newAV ();
1819
1820 frame->prepare = prepare_nop;
1821 }
1822 else
1823 {
1824 av_clear (GvAV (PL_defgv));
1825 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1826
1827 coro->prio = 0;
1828
1829 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1830 api_trace (aTHX_ coro_current, 0);
1831
1832 frame->prepare = prepare_schedule;
1833 av_push (av_async_pool, SvREFCNT_inc (hv));
1834 }
1835 }
1836 else
1837 {
1838 /* first iteration, simply fall through */
1839 frame->prepare = prepare_nop;
1840 }
1841
1842 frame->check = slf_check_pool_handler;
1843 frame->data = (void *)coro;
1844}
1845
1846/*****************************************************************************/
1847/* rouse callback */
1848
1849#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1850
1851static void
1852coro_rouse_callback (pTHX_ CV *cv)
1853{
1854 dXSARGS;
1855 SV *data = (SV *)GENSUB_ARG;
1856
1857 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1858 {
1859 /* first call, set args */
1860 AV *av = newAV ();
1861 SV *coro = SvRV (data);
1862
1863 SvRV_set (data, (SV *)av);
1864 api_ready (aTHX_ coro);
1865 SvREFCNT_dec (coro);
1866
1867 /* better take a full copy of the arguments */
1868 while (items--)
1869 av_store (av, items, newSVsv (ST (items)));
1870 }
1871
1872 XSRETURN_EMPTY;
1873}
1874
1875static int
1876slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1877{
1878 SV *data = (SV *)frame->data;
1879
1880 if (CORO_THROW)
1881 return 0;
1882
1883 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1884 return 1;
1885
1886 /* now push all results on the stack */
1887 {
1888 dSP;
1889 AV *av = (AV *)SvRV (data);
1890 int i;
1891
1892 EXTEND (SP, AvFILLp (av) + 1);
1893 for (i = 0; i <= AvFILLp (av); ++i)
1894 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1895
1896 /* we have stolen the elements, so ste length to zero and free */
1897 AvFILLp (av) = -1;
1898 av_undef (av);
1899
1900 PUTBACK;
1901 }
1902
1903 return 0;
1904}
1905
1906static void
1907slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1908{
1909 SV *cb;
1910
1911 if (items)
1912 cb = arg [0];
1913 else
1914 {
1915 struct coro *coro = SvSTATE_current;
1916
1917 if (!coro->rouse_cb)
1918 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1919
1920 cb = sv_2mortal (coro->rouse_cb);
1921 coro->rouse_cb = 0;
1922 }
1923
1924 if (!SvROK (cb)
1925 || SvTYPE (SvRV (cb)) != SVt_PVCV
1926 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1927 croak ("Coro::rouse_wait called with illegal callback argument,");
1928
1929 {
1930 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1931 SV *data = (SV *)GENSUB_ARG;
1932
1933 frame->data = (void *)data;
1934 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1935 frame->check = slf_check_rouse_wait;
1936 }
1937}
1938
1939static SV *
1940coro_new_rouse_cb (pTHX)
1941{
1942 HV *hv = (HV *)SvRV (coro_current);
1943 struct coro *coro = SvSTATE_hv (hv);
1944 SV *data = newRV_inc ((SV *)hv);
1945 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1946
1947 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1948 SvREFCNT_dec (data); /* magicext increases the refcount */
1949
1950 SvREFCNT_dec (coro->rouse_cb);
1951 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1952
1953 return cb;
1954}
1955
1956/*****************************************************************************/
1957/* schedule-like-function opcode (SLF) */
1958
1959static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1960static const CV *slf_cv;
1961static SV **slf_argv;
1962static int slf_argc, slf_arga; /* count, allocated */
1963static I32 slf_ax; /* top of stack, for restore */
1964
1965/* this restores the stack in the case we patched the entersub, to */
1966/* recreate the stack frame as perl will on following calls */
1967/* since entersub cleared the stack */
1968static OP *
1969pp_restore (pTHX)
1970{
1971 int i;
1972 SV **SP = PL_stack_base + slf_ax;
1973
1974 PUSHMARK (SP);
1975
1976 EXTEND (SP, slf_argc + 1);
1977
1978 for (i = 0; i < slf_argc; ++i)
1979 PUSHs (sv_2mortal (slf_argv [i]));
1980
1981 PUSHs ((SV *)CvGV (slf_cv));
1982
1983 RETURNOP (slf_restore.op_first);
1984}
1985
1986static void
1987slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1988{
1989 SV **arg = (SV **)slf_frame.data;
1990
1991 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1992}
1993
1994static void
1995slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1996{
1997 if (items != 2)
1998 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1999
2000 frame->prepare = slf_prepare_transfer;
2001 frame->check = slf_check_nop;
2002 frame->data = (void *)arg; /* let's hope it will stay valid */
2003}
2004
2005static void
2006slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2007{
2008 frame->prepare = prepare_schedule;
2009 frame->check = slf_check_nop;
2010}
2011
2012static void
2013slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2014{
2015 struct coro *next = (struct coro *)slf_frame.data;
2016
2017 SvREFCNT_inc_NN (next->hv);
2018 prepare_schedule_to (aTHX_ ta, next);
2019}
2020
2021static void
2022slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2023{
2024 if (!items)
2025 croak ("Coro::schedule_to expects a coroutine argument, caught");
2026
2027 frame->data = (void *)SvSTATE (arg [0]);
2028 frame->prepare = slf_prepare_schedule_to;
2029 frame->check = slf_check_nop;
2030}
2031
2032static void
2033slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2034{
2035 api_ready (aTHX_ SvRV (coro_current));
2036
2037 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2038}
2039
2040static void
2041slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2042{
2043 frame->prepare = prepare_cede;
2044 frame->check = slf_check_nop;
2045}
2046
2047static void
2048slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2049{
2050 frame->prepare = prepare_cede_notself;
2051 frame->check = slf_check_nop;
2052}
2053
2054/*
2055 * these not obviously related functions are all rolled into one
2056 * function to increase chances that they all will call transfer with the same
2057 * stack offset
2058 * SLF stands for "schedule-like-function".
2059 */
2060static OP *
2061pp_slf (pTHX)
2062{
2063 I32 checkmark; /* mark SP to see how many elements check has pushed */
2064
2065 /* set up the slf frame, unless it has already been set-up */
2066 /* the latter happens when a new coro has been started */
2067 /* or when a new cctx was attached to an existing coroutine */
2068 if (expect_true (!slf_frame.prepare))
2069 {
2070 /* first iteration */
2071 dSP;
2072 SV **arg = PL_stack_base + TOPMARK + 1;
2073 int items = SP - arg; /* args without function object */
2074 SV *gv = *sp;
2075
2076 /* do a quick consistency check on the "function" object, and if it isn't */
2077 /* for us, divert to the real entersub */
2078 if (SvTYPE (gv) != SVt_PVGV
2079 || !GvCV (gv)
2080 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2081 return PL_ppaddr[OP_ENTERSUB](aTHX);
2082
2083 if (!(PL_op->op_flags & OPf_STACKED))
2084 {
2085 /* ampersand-form of call, use @_ instead of stack */
2086 AV *av = GvAV (PL_defgv);
2087 arg = AvARRAY (av);
2088 items = AvFILLp (av) + 1;
2089 }
2090
2091 /* now call the init function, which needs to set up slf_frame */
2092 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2093 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2094
2095 /* pop args */
2096 SP = PL_stack_base + POPMARK;
2097
2098 PUTBACK;
2099 }
2100
2101 /* now that we have a slf_frame, interpret it! */
2102 /* we use a callback system not to make the code needlessly */
2103 /* complicated, but so we can run multiple perl coros from one cctx */
2104
2105 do
2106 {
2107 struct coro_transfer_args ta;
2108
2109 slf_frame.prepare (aTHX_ &ta);
2110 TRANSFER (ta, 0);
2111
2112 checkmark = PL_stack_sp - PL_stack_base;
2113 }
2114 while (slf_frame.check (aTHX_ &slf_frame));
2115
2116 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2117
2118 /* exception handling */
2119 if (expect_false (CORO_THROW))
2120 {
2121 SV *exception = sv_2mortal (CORO_THROW);
2122
2123 CORO_THROW = 0;
2124 sv_setsv (ERRSV, exception);
2125 croak (0);
2126 }
2127
2128 /* return value handling - mostly like entersub */
2129 /* make sure we put something on the stack in scalar context */
2130 if (GIMME_V == G_SCALAR)
2131 {
2132 dSP;
2133 SV **bot = PL_stack_base + checkmark;
2134
2135 if (sp == bot) /* too few, push undef */
2136 bot [1] = &PL_sv_undef;
2137 else if (sp != bot + 1) /* too many, take last one */
2138 bot [1] = *sp;
2139
2140 SP = bot + 1;
2141
2142 PUTBACK;
2143 }
2144
2145 return NORMAL;
2146}
2147
2148static void
2149api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2150{
2151 int i;
2152 SV **arg = PL_stack_base + ax;
2153 int items = PL_stack_sp - arg + 1;
2154
2155 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2156
2157 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2158 && PL_op->op_ppaddr != pp_slf)
2159 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2160
2161 CvFLAGS (cv) |= CVf_SLF;
2162 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2163 slf_cv = cv;
2164
2165 /* we patch the op, and then re-run the whole call */
2166 /* we have to put the same argument on the stack for this to work */
2167 /* and this will be done by pp_restore */
2168 slf_restore.op_next = (OP *)&slf_restore;
2169 slf_restore.op_type = OP_CUSTOM;
2170 slf_restore.op_ppaddr = pp_restore;
2171 slf_restore.op_first = PL_op;
2172
2173 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2174
2175 if (PL_op->op_flags & OPf_STACKED)
2176 {
2177 if (items > slf_arga)
2178 {
2179 slf_arga = items;
2180 free (slf_argv);
2181 slf_argv = malloc (slf_arga * sizeof (SV *));
2182 }
2183
2184 slf_argc = items;
2185
2186 for (i = 0; i < items; ++i)
2187 slf_argv [i] = SvREFCNT_inc (arg [i]);
2188 }
2189 else
2190 slf_argc = 0;
2191
2192 PL_op->op_ppaddr = pp_slf;
2193 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2194
2195 PL_op = (OP *)&slf_restore;
2196}
2197
2198/*****************************************************************************/
2199/* PerlIO::cede */
2200
2201typedef struct
2202{
2203 PerlIOBuf base;
2204 NV next, every;
2205} PerlIOCede;
2206
2207static IV
2208PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2209{
2210 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2211
2212 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2213 self->next = nvtime () + self->every;
2214
2215 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2216}
2217
2218static SV *
2219PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2220{
2221 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2222
2223 return newSVnv (self->every);
2224}
2225
2226static IV
2227PerlIOCede_flush (pTHX_ PerlIO *f)
2228{
2229 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2230 double now = nvtime ();
2231
2232 if (now >= self->next)
2233 {
2234 api_cede (aTHX);
2235 self->next = now + self->every;
2236 }
2237
2238 return PerlIOBuf_flush (aTHX_ f);
2239}
2240
2241static PerlIO_funcs PerlIO_cede =
2242{
2243 sizeof(PerlIO_funcs),
2244 "cede",
2245 sizeof(PerlIOCede),
2246 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2247 PerlIOCede_pushed,
2248 PerlIOBuf_popped,
2249 PerlIOBuf_open,
2250 PerlIOBase_binmode,
2251 PerlIOCede_getarg,
2252 PerlIOBase_fileno,
2253 PerlIOBuf_dup,
2254 PerlIOBuf_read,
2255 PerlIOBuf_unread,
2256 PerlIOBuf_write,
2257 PerlIOBuf_seek,
2258 PerlIOBuf_tell,
2259 PerlIOBuf_close,
2260 PerlIOCede_flush,
2261 PerlIOBuf_fill,
2262 PerlIOBase_eof,
2263 PerlIOBase_error,
2264 PerlIOBase_clearerr,
2265 PerlIOBase_setlinebuf,
2266 PerlIOBuf_get_base,
2267 PerlIOBuf_bufsiz,
2268 PerlIOBuf_get_ptr,
2269 PerlIOBuf_get_cnt,
2270 PerlIOBuf_set_ptrcnt,
2271};
2272
2273/*****************************************************************************/
2274/* Coro::Semaphore & Coro::Signal */
2275
2276static SV *
2277coro_waitarray_new (pTHX_ int count)
2278{
2279 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2280 AV *av = newAV ();
2281 SV **ary;
2282
2283 /* unfortunately, building manually saves memory */
2284 Newx (ary, 2, SV *);
2285 AvALLOC (av) = ary;
2286 /*AvARRAY (av) = ary;*/
2287 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2288 AvMAX (av) = 1;
2289 AvFILLp (av) = 0;
2290 ary [0] = newSViv (count);
2291
2292 return newRV_noinc ((SV *)av);
2293}
2294
2295/* semaphore */
2296
2297static void
2298coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2299{
2300 SV *count_sv = AvARRAY (av)[0];
2301 IV count = SvIVX (count_sv);
2302
2303 count += adjust;
2304 SvIVX (count_sv) = count;
2305
2306 /* now wake up as many waiters as are expected to lock */
2307 while (count > 0 && AvFILLp (av) > 0)
2308 {
2309 SV *cb;
2310
2311 /* swap first two elements so we can shift a waiter */
2312 AvARRAY (av)[0] = AvARRAY (av)[1];
2313 AvARRAY (av)[1] = count_sv;
2314 cb = av_shift (av);
2315
2316 if (SvOBJECT (cb))
2317 {
2318 api_ready (aTHX_ cb);
2319 --count;
2320 }
2321 else if (SvTYPE (cb) == SVt_PVCV)
1010 { 2322 {
1011 dSP; 2323 dSP;
1012
1013 ENTER;
1014 SAVETMPS;
1015
1016 PUSHMARK (SP); 2324 PUSHMARK (SP);
2325 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1017 PUTBACK; 2326 PUTBACK;
1018 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2327 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1019
1020 FREETMPS;
1021 LEAVE;
1022 continue;
1023 } 2328 }
1024 2329
1025 ta->next = SvSTATE (next_sv); 2330 SvREFCNT_dec (cb);
2331 }
2332}
1026 2333
1027 /* cannot transfer to destroyed coros, skip and look for next */ 2334static void
1028 if (ta->next->flags & CF_DESTROYED) 2335coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2336{
2337 /* call $sem->adjust (0) to possibly wake up some other waiters */
2338 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2339}
2340
2341static int
2342slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2343{
2344 AV *av = (AV *)frame->data;
2345 SV *count_sv = AvARRAY (av)[0];
2346
2347 /* if we are about to throw, don't actually acquire the lock, just throw */
2348 if (CORO_THROW)
2349 return 0;
2350 else if (SvIVX (count_sv) > 0)
2351 {
2352 SvSTATE_current->on_destroy = 0;
2353
2354 if (acquire)
2355 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2356 else
2357 coro_semaphore_adjust (aTHX_ av, 0);
2358
2359 return 0;
2360 }
2361 else
2362 {
2363 int i;
2364 /* if we were woken up but can't down, we look through the whole */
2365 /* waiters list and only add us if we aren't in there already */
2366 /* this avoids some degenerate memory usage cases */
2367
2368 for (i = 1; i <= AvFILLp (av); ++i)
2369 if (AvARRAY (av)[i] == SvRV (coro_current))
2370 return 1;
2371
2372 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2373 return 1;
2374 }
2375}
2376
2377static int
2378slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2379{
2380 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2381}
2382
2383static int
2384slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2385{
2386 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2387}
2388
2389static void
2390slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2391{
2392 AV *av = (AV *)SvRV (arg [0]);
2393
2394 if (SvIVX (AvARRAY (av)[0]) > 0)
2395 {
2396 frame->data = (void *)av;
2397 frame->prepare = prepare_nop;
2398 }
2399 else
2400 {
2401 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2402
2403 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2404 frame->prepare = prepare_schedule;
2405
2406 /* to avoid race conditions when a woken-up coro gets terminated */
2407 /* we arrange for a temporary on_destroy that calls adjust (0) */
2408 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2409 }
2410}
2411
2412static void
2413slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2414{
2415 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2416 frame->check = slf_check_semaphore_down;
2417}
2418
2419static void
2420slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2421{
2422 if (items >= 2)
2423 {
2424 /* callback form */
2425 AV *av = (AV *)SvRV (arg [0]);
2426 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2427
2428 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2429
2430 if (SvIVX (AvARRAY (av)[0]) > 0)
2431 coro_semaphore_adjust (aTHX_ av, 0);
2432
2433 frame->prepare = prepare_nop;
2434 frame->check = slf_check_nop;
2435 }
2436 else
2437 {
2438 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2439 frame->check = slf_check_semaphore_wait;
2440 }
2441}
2442
2443/* signal */
2444
2445static void
2446coro_signal_wake (pTHX_ AV *av, int count)
2447{
2448 SvIVX (AvARRAY (av)[0]) = 0;
2449
2450 /* now signal count waiters */
2451 while (count > 0 && AvFILLp (av) > 0)
2452 {
2453 SV *cb;
2454
2455 /* swap first two elements so we can shift a waiter */
2456 cb = AvARRAY (av)[0];
2457 AvARRAY (av)[0] = AvARRAY (av)[1];
2458 AvARRAY (av)[1] = cb;
2459
2460 cb = av_shift (av);
2461
2462 api_ready (aTHX_ cb);
2463 sv_setiv (cb, 0); /* signal waiter */
2464 SvREFCNT_dec (cb);
2465
2466 --count;
2467 }
2468}
2469
2470static int
2471slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2472{
2473 /* if we are about to throw, also stop waiting */
2474 return SvROK ((SV *)frame->data) && !CORO_THROW;
2475}
2476
2477static void
2478slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2479{
2480 AV *av = (AV *)SvRV (arg [0]);
2481
2482 if (SvIVX (AvARRAY (av)[0]))
2483 {
2484 SvIVX (AvARRAY (av)[0]) = 0;
2485 frame->prepare = prepare_nop;
2486 frame->check = slf_check_nop;
2487 }
2488 else
2489 {
2490 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2491
2492 av_push (av, waiter);
2493
2494 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2495 frame->prepare = prepare_schedule;
2496 frame->check = slf_check_signal_wait;
2497 }
2498}
2499
2500/*****************************************************************************/
2501/* Coro::AIO */
2502
2503#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2504
2505/* helper storage struct */
2506struct io_state
2507{
2508 int errorno;
2509 I32 laststype; /* U16 in 5.10.0 */
2510 int laststatval;
2511 Stat_t statcache;
2512};
2513
2514static void
2515coro_aio_callback (pTHX_ CV *cv)
2516{
2517 dXSARGS;
2518 AV *state = (AV *)GENSUB_ARG;
2519 SV *coro = av_pop (state);
2520 SV *data_sv = newSV (sizeof (struct io_state));
2521
2522 av_extend (state, items - 1);
2523
2524 sv_upgrade (data_sv, SVt_PV);
2525 SvCUR_set (data_sv, sizeof (struct io_state));
2526 SvPOK_only (data_sv);
2527
2528 {
2529 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2530
2531 data->errorno = errno;
2532 data->laststype = PL_laststype;
2533 data->laststatval = PL_laststatval;
2534 data->statcache = PL_statcache;
2535 }
2536
2537 /* now build the result vector out of all the parameters and the data_sv */
2538 {
2539 int i;
2540
2541 for (i = 0; i < items; ++i)
2542 av_push (state, SvREFCNT_inc_NN (ST (i)));
2543 }
2544
2545 av_push (state, data_sv);
2546
2547 api_ready (aTHX_ coro);
2548 SvREFCNT_dec (coro);
2549 SvREFCNT_dec ((AV *)state);
2550}
2551
2552static int
2553slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2554{
2555 AV *state = (AV *)frame->data;
2556
2557 /* if we are about to throw, return early */
2558 /* this does not cancel the aio request, but at least */
2559 /* it quickly returns */
2560 if (CORO_THROW)
2561 return 0;
2562
2563 /* one element that is an RV? repeat! */
2564 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2565 return 1;
2566
2567 /* restore status */
2568 {
2569 SV *data_sv = av_pop (state);
2570 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2571
2572 errno = data->errorno;
2573 PL_laststype = data->laststype;
2574 PL_laststatval = data->laststatval;
2575 PL_statcache = data->statcache;
2576
2577 SvREFCNT_dec (data_sv);
2578 }
2579
2580 /* push result values */
2581 {
2582 dSP;
2583 int i;
2584
2585 EXTEND (SP, AvFILLp (state) + 1);
2586 for (i = 0; i <= AvFILLp (state); ++i)
2587 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2588
2589 PUTBACK;
2590 }
2591
2592 return 0;
2593}
2594
2595static void
2596slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2597{
2598 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2599 SV *coro_hv = SvRV (coro_current);
2600 struct coro *coro = SvSTATE_hv (coro_hv);
2601
2602 /* put our coroutine id on the state arg */
2603 av_push (state, SvREFCNT_inc_NN (coro_hv));
2604
2605 /* first see whether we have a non-zero priority and set it as AIO prio */
2606 if (coro->prio)
2607 {
2608 dSP;
2609
2610 static SV *prio_cv;
2611 static SV *prio_sv;
2612
2613 if (expect_false (!prio_cv))
1029 { 2614 {
1030 SvREFCNT_dec (next_sv); 2615 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
1031 continue; 2616 prio_sv = newSViv (0);
1032 } 2617 }
1033 2618
1034 break; 2619 PUSHMARK (SP);
1035 } 2620 sv_setiv (prio_sv, coro->prio);
2621 XPUSHs (prio_sv);
1036 2622
1037 /* free this only after the transfer */ 2623 PUTBACK;
1038 prev_sv = SvRV (coro_current); 2624 call_sv (prio_cv, G_VOID | G_DISCARD);
1039 SvRV_set (coro_current, next_sv);
1040 ta->prev = SvSTATE (prev_sv);
1041
1042 assert (ta->next->flags & CF_READY);
1043 ta->next->flags &= ~CF_READY;
1044
1045 LOCK;
1046 free_coro_mortal ();
1047 coro_mortal = prev_sv;
1048 UNLOCK;
1049}
1050
1051static void
1052prepare_cede (struct transfer_args *ta)
1053{
1054 api_ready (coro_current);
1055 prepare_schedule (ta);
1056}
1057
1058static int
1059prepare_cede_notself (struct transfer_args *ta)
1060{
1061 if (coro_nready)
1062 { 2625 }
1063 SV *prev = SvRV (coro_current); 2626
1064 prepare_schedule (ta); 2627 /* now call the original request */
1065 api_ready (prev); 2628 {
1066 return 1; 2629 dSP;
2630 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2631 int i;
2632
2633 PUSHMARK (SP);
2634
2635 /* first push all args to the stack */
2636 EXTEND (SP, items + 1);
2637
2638 for (i = 0; i < items; ++i)
2639 PUSHs (arg [i]);
2640
2641 /* now push the callback closure */
2642 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2643
2644 /* now call the AIO function - we assume our request is uncancelable */
2645 PUTBACK;
2646 call_sv ((SV *)req, G_VOID | G_DISCARD);
1067 } 2647 }
1068 else
1069 return 0;
1070}
1071 2648
1072static void 2649 /* now that the requets is going, we loop toll we have a result */
1073api_schedule (void) 2650 frame->data = (void *)state;
1074{ 2651 frame->prepare = prepare_schedule;
1075 struct transfer_args ta; 2652 frame->check = slf_check_aio_req;
1076
1077 prepare_schedule (&ta);
1078 TRANSFER (ta);
1079} 2653}
1080 2654
1081static int 2655static void
1082api_cede (void) 2656coro_aio_req_xs (pTHX_ CV *cv)
1083{ 2657{
1084 struct transfer_args ta; 2658 dXSARGS;
1085 2659
1086 prepare_cede (&ta); 2660 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1087 2661
1088 if (ta.prev != ta.next) 2662 XSRETURN_EMPTY;
1089 {
1090 TRANSFER (ta);
1091 return 1;
1092 }
1093 else
1094 return 0;
1095} 2663}
1096 2664
1097static int 2665/*****************************************************************************/
1098api_cede_notself (void)
1099{
1100 struct transfer_args ta;
1101 2666
1102 if (prepare_cede_notself (&ta))
1103 {
1104 TRANSFER (ta);
1105 return 1;
1106 }
1107 else
1108 return 0;
1109}
1110
1111MODULE = Coro::State PACKAGE = Coro::State 2667MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1112 2668
1113PROTOTYPES: DISABLE 2669PROTOTYPES: DISABLE
1114 2670
1115BOOT: 2671BOOT:
1116{ 2672{
1117#ifdef USE_ITHREADS 2673#ifdef USE_ITHREADS
1118 MUTEX_INIT (&coro_mutex); 2674# if CORO_PTHREAD
2675 coro_thx = PERL_GET_CONTEXT;
2676# endif
1119#endif 2677#endif
1120 BOOT_PAGESIZE; 2678 BOOT_PAGESIZE;
1121 2679
2680 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2681 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2682
2683 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2684 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2685 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2686
2687 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2688 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2689 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2690
1122 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2691 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1123 2692
2693 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2694 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1124 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2695 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1125 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1126 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1127 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1128 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2696 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1129 2697
1130 main_mainstack = PL_mainstack; 2698 main_mainstack = PL_mainstack;
2699 main_top_env = PL_top_env;
1131 2700
2701 while (main_top_env->je_prev)
2702 main_top_env = main_top_env->je_prev;
2703
2704 {
2705 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2706
2707 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2708 hv_store_ent (PL_custom_op_names, slf,
2709 newSVpv ("coro_slf", 0), 0);
2710
2711 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2712 hv_store_ent (PL_custom_op_descs, slf,
2713 newSVpv ("coro schedule like function", 0), 0);
2714 }
2715
1132 coroapi.ver = CORO_API_VERSION; 2716 coroapi.ver = CORO_API_VERSION;
2717 coroapi.rev = CORO_API_REVISION;
2718
1133 coroapi.transfer = api_transfer; 2719 coroapi.transfer = api_transfer;
2720
2721 coroapi.sv_state = SvSTATE_;
2722 coroapi.execute_slf = api_execute_slf;
2723 coroapi.prepare_nop = prepare_nop;
2724 coroapi.prepare_schedule = prepare_schedule;
2725 coroapi.prepare_cede = prepare_cede;
2726 coroapi.prepare_cede_notself = prepare_cede_notself;
2727
2728 {
2729 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2730
2731 if (!svp) croak ("Time::HiRes is required");
2732 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2733
2734 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2735 }
1134 2736
1135 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2737 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1136} 2738}
1137 2739
1138SV * 2740SV *
1139new (char *klass, ...) 2741new (char *klass, ...)
2742 ALIAS:
2743 Coro::new = 1
1140 CODE: 2744 CODE:
1141{ 2745{
1142 struct coro *coro; 2746 struct coro *coro;
2747 MAGIC *mg;
1143 HV *hv; 2748 HV *hv;
2749 CV *cb;
1144 int i; 2750 int i;
1145 2751
2752 if (items > 1)
2753 {
2754 cb = coro_sv_2cv (aTHX_ ST (1));
2755
2756 if (!ix)
2757 {
2758 if (CvISXSUB (cb))
2759 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2760
2761 if (!CvROOT (cb))
2762 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2763 }
2764 }
2765
1146 Newz (0, coro, 1, struct coro); 2766 Newz (0, coro, 1, struct coro);
1147 coro->args = newAV (); 2767 coro->args = newAV ();
1148 coro->save = CORO_SAVE_ALL;
1149 coro->flags = CF_NEW; 2768 coro->flags = CF_NEW;
1150 2769
2770 if (coro_first) coro_first->prev = coro;
2771 coro->next = coro_first;
2772 coro_first = coro;
2773
1151 hv = newHV (); 2774 coro->hv = hv = newHV ();
1152 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2775 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2776 mg->mg_flags |= MGf_DUP;
1153 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2777 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1154 2778
2779 if (items > 1)
2780 {
2781 av_extend (coro->args, items - 1 + ix - 1);
2782
2783 if (ix)
2784 {
2785 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2786 cb = cv_coro_run;
2787 }
2788
2789 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2790
1155 for (i = 1; i < items; i++) 2791 for (i = 2; i < items; i++)
1156 av_push (coro->args, newSVsv (ST (i))); 2792 av_push (coro->args, newSVsv (ST (i)));
2793 }
1157} 2794}
1158 OUTPUT: 2795 OUTPUT:
1159 RETVAL 2796 RETVAL
1160 2797
1161int 2798void
1162save (SV *coro, int new_save = -1) 2799transfer (...)
2800 PROTOTYPE: $$
1163 CODE: 2801 CODE:
1164 RETVAL = api_save (coro, new_save); 2802 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1165 OUTPUT:
1166 RETVAL
1167
1168void
1169_set_stacklevel (...)
1170 ALIAS:
1171 Coro::State::transfer = 1
1172 Coro::schedule = 2
1173 Coro::cede = 3
1174 Coro::cede_notself = 4
1175 CODE:
1176{
1177 struct transfer_args ta;
1178
1179 switch (ix)
1180 {
1181 case 0:
1182 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1183 ta.next = 0;
1184 break;
1185
1186 case 1:
1187 if (items != 2)
1188 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1189
1190 prepare_transfer (&ta, ST (0), ST (1));
1191 break;
1192
1193 case 2:
1194 prepare_schedule (&ta);
1195 break;
1196
1197 case 3:
1198 prepare_cede (&ta);
1199 break;
1200
1201 case 4:
1202 if (!prepare_cede_notself (&ta))
1203 XSRETURN_EMPTY;
1204
1205 break;
1206 }
1207
1208 BARRIER;
1209 TRANSFER (ta);
1210
1211 if (GIMME_V != G_VOID && ta.next != ta.prev)
1212 XSRETURN_YES;
1213}
1214 2803
1215bool 2804bool
1216_destroy (SV *coro_sv) 2805_destroy (SV *coro_sv)
1217 CODE: 2806 CODE:
1218 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 2807 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1219 OUTPUT: 2808 OUTPUT:
1220 RETVAL 2809 RETVAL
1221 2810
1222void 2811void
1223_exit (code) 2812_exit (int code)
1224 int code
1225 PROTOTYPE: $ 2813 PROTOTYPE: $
1226 CODE: 2814 CODE:
1227 _exit (code); 2815 _exit (code);
1228 2816
1229int 2817int
2818cctx_stacksize (int new_stacksize = 0)
2819 PROTOTYPE: ;$
2820 CODE:
2821 RETVAL = cctx_stacksize;
2822 if (new_stacksize)
2823 {
2824 cctx_stacksize = new_stacksize;
2825 ++cctx_gen;
2826 }
2827 OUTPUT:
2828 RETVAL
2829
2830int
2831cctx_max_idle (int max_idle = 0)
2832 PROTOTYPE: ;$
2833 CODE:
2834 RETVAL = cctx_max_idle;
2835 if (max_idle > 1)
2836 cctx_max_idle = max_idle;
2837 OUTPUT:
2838 RETVAL
2839
2840int
1230cctx_count () 2841cctx_count ()
2842 PROTOTYPE:
1231 CODE: 2843 CODE:
1232 RETVAL = cctx_count; 2844 RETVAL = cctx_count;
1233 OUTPUT: 2845 OUTPUT:
1234 RETVAL 2846 RETVAL
1235 2847
1236int 2848int
1237cctx_idle () 2849cctx_idle ()
2850 PROTOTYPE:
1238 CODE: 2851 CODE:
1239 RETVAL = cctx_idle; 2852 RETVAL = cctx_idle;
1240 OUTPUT: 2853 OUTPUT:
1241 RETVAL 2854 RETVAL
1242 2855
2856void
2857list ()
2858 PROTOTYPE:
2859 PPCODE:
2860{
2861 struct coro *coro;
2862 for (coro = coro_first; coro; coro = coro->next)
2863 if (coro->hv)
2864 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2865}
2866
2867void
2868call (Coro::State coro, SV *coderef)
2869 ALIAS:
2870 eval = 1
2871 CODE:
2872{
2873 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2874 {
2875 struct coro temp;
2876
2877 if (!(coro->flags & CF_RUNNING))
2878 {
2879 PUTBACK;
2880 save_perl (aTHX_ &temp);
2881 load_perl (aTHX_ coro);
2882 }
2883
2884 {
2885 dSP;
2886 ENTER;
2887 SAVETMPS;
2888 PUTBACK;
2889 PUSHSTACK;
2890 PUSHMARK (SP);
2891
2892 if (ix)
2893 eval_sv (coderef, 0);
2894 else
2895 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2896
2897 POPSTACK;
2898 SPAGAIN;
2899 FREETMPS;
2900 LEAVE;
2901 PUTBACK;
2902 }
2903
2904 if (!(coro->flags & CF_RUNNING))
2905 {
2906 save_perl (aTHX_ coro);
2907 load_perl (aTHX_ &temp);
2908 SPAGAIN;
2909 }
2910 }
2911}
2912
2913SV *
2914is_ready (Coro::State coro)
2915 PROTOTYPE: $
2916 ALIAS:
2917 is_ready = CF_READY
2918 is_running = CF_RUNNING
2919 is_new = CF_NEW
2920 is_destroyed = CF_DESTROYED
2921 CODE:
2922 RETVAL = boolSV (coro->flags & ix);
2923 OUTPUT:
2924 RETVAL
2925
2926void
2927throw (Coro::State self, SV *throw = &PL_sv_undef)
2928 PROTOTYPE: $;$
2929 CODE:
2930{
2931 struct coro *current = SvSTATE_current;
2932 SV **throwp = self == current ? &CORO_THROW : &self->except;
2933 SvREFCNT_dec (*throwp);
2934 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2935}
2936
2937void
2938api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2939 PROTOTYPE: $;$
2940 C_ARGS: aTHX_ coro, flags
2941
2942SV *
2943has_cctx (Coro::State coro)
2944 PROTOTYPE: $
2945 CODE:
2946 RETVAL = boolSV (!!coro->cctx);
2947 OUTPUT:
2948 RETVAL
2949
2950int
2951is_traced (Coro::State coro)
2952 PROTOTYPE: $
2953 CODE:
2954 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2955 OUTPUT:
2956 RETVAL
2957
2958UV
2959rss (Coro::State coro)
2960 PROTOTYPE: $
2961 ALIAS:
2962 usecount = 1
2963 CODE:
2964 switch (ix)
2965 {
2966 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2967 case 1: RETVAL = coro->usecount; break;
2968 }
2969 OUTPUT:
2970 RETVAL
2971
2972void
2973force_cctx ()
2974 PROTOTYPE:
2975 CODE:
2976 SvSTATE_current->cctx->idle_sp = 0;
2977
2978void
2979swap_defsv (Coro::State self)
2980 PROTOTYPE: $
2981 ALIAS:
2982 swap_defav = 1
2983 CODE:
2984 if (!self->slot)
2985 croak ("cannot swap state with coroutine that has no saved state,");
2986 else
2987 {
2988 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2989 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2990
2991 SV *tmp = *src; *src = *dst; *dst = tmp;
2992 }
2993
2994
1243MODULE = Coro::State PACKAGE = Coro 2995MODULE = Coro::State PACKAGE = Coro
1244 2996
1245BOOT: 2997BOOT:
1246{ 2998{
1247 int i; 2999 int i;
1248 3000
3001 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3002 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3003 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3004 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3005 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3006 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3007
3008 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3009 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3010 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3011 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3012
1249 coro_stash = gv_stashpv ("Coro", TRUE); 3013 coro_stash = gv_stashpv ("Coro", TRUE);
1250 3014
1251 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3015 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1252 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3016 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1253 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3017 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1254 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3018 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1255 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3019 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1256 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3020 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1257 3021
1258 coro_current = get_sv ("Coro::current", FALSE);
1259 SvREADONLY_on (coro_current);
1260
1261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3022 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1262 coro_ready[i] = newAV (); 3023 coro_ready[i] = newAV ();
1263 3024
1264 { 3025 {
1265 SV *sv = perl_get_sv("Coro::API", 1); 3026 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1266 3027
1267 coroapi.schedule = api_schedule; 3028 coroapi.schedule = api_schedule;
1268 coroapi.save = api_save; 3029 coroapi.schedule_to = api_schedule_to;
1269 coroapi.cede = api_cede; 3030 coroapi.cede = api_cede;
1270 coroapi.cede_notself = api_cede_notself; 3031 coroapi.cede_notself = api_cede_notself;
1271 coroapi.ready = api_ready; 3032 coroapi.ready = api_ready;
1272 coroapi.is_ready = api_is_ready; 3033 coroapi.is_ready = api_is_ready;
1273 coroapi.nready = &coro_nready; 3034 coroapi.nready = coro_nready;
1274 coroapi.current = coro_current; 3035 coroapi.current = coro_current;
1275 3036
1276 GCoroAPI = &coroapi; 3037 /*GCoroAPI = &coroapi;*/
1277 sv_setiv (sv, (IV)&coroapi); 3038 sv_setiv (sv, (IV)&coroapi);
1278 SvREADONLY_on (sv); 3039 SvREADONLY_on (sv);
1279 } 3040 }
1280} 3041}
3042
3043void
3044schedule (...)
3045 CODE:
3046 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3047
3048void
3049schedule_to (...)
3050 CODE:
3051 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3052
3053void
3054cede_to (...)
3055 CODE:
3056 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3057
3058void
3059cede (...)
3060 CODE:
3061 CORO_EXECUTE_SLF_XS (slf_init_cede);
3062
3063void
3064cede_notself (...)
3065 CODE:
3066 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1281 3067
1282void 3068void
1283_set_current (SV *current) 3069_set_current (SV *current)
1284 PROTOTYPE: $ 3070 PROTOTYPE: $
1285 CODE: 3071 CODE:
1286 SvREFCNT_dec (SvRV (coro_current)); 3072 SvREFCNT_dec (SvRV (coro_current));
1287 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3073 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3074
3075void
3076_set_readyhook (SV *hook)
3077 PROTOTYPE: $
3078 CODE:
3079 SvREFCNT_dec (coro_readyhook);
3080 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1288 3081
1289int 3082int
1290prio (Coro::State coro, int newprio = 0) 3083prio (Coro::State coro, int newprio = 0)
3084 PROTOTYPE: $;$
1291 ALIAS: 3085 ALIAS:
1292 nice = 1 3086 nice = 1
1293 CODE: 3087 CODE:
1294{ 3088{
1295 RETVAL = coro->prio; 3089 RETVAL = coro->prio;
… …
1310 3104
1311SV * 3105SV *
1312ready (SV *self) 3106ready (SV *self)
1313 PROTOTYPE: $ 3107 PROTOTYPE: $
1314 CODE: 3108 CODE:
1315 RETVAL = boolSV (api_ready (self)); 3109 RETVAL = boolSV (api_ready (aTHX_ self));
1316 OUTPUT:
1317 RETVAL
1318
1319SV *
1320is_ready (SV *self)
1321 PROTOTYPE: $
1322 CODE:
1323 RETVAL = boolSV (api_is_ready (self));
1324 OUTPUT: 3110 OUTPUT:
1325 RETVAL 3111 RETVAL
1326 3112
1327int 3113int
1328nready (...) 3114nready (...)
… …
1330 CODE: 3116 CODE:
1331 RETVAL = coro_nready; 3117 RETVAL = coro_nready;
1332 OUTPUT: 3118 OUTPUT:
1333 RETVAL 3119 RETVAL
1334 3120
1335MODULE = Coro::State PACKAGE = Coro::AIO 3121void
3122_pool_handler (...)
3123 CODE:
3124 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3125
3126void
3127async_pool (SV *cv, ...)
3128 PROTOTYPE: &@
3129 PPCODE:
3130{
3131 HV *hv = (HV *)av_pop (av_async_pool);
3132 AV *av = newAV ();
3133 SV *cb = ST (0);
3134 int i;
3135
3136 av_extend (av, items - 2);
3137 for (i = 1; i < items; ++i)
3138 av_push (av, SvREFCNT_inc_NN (ST (i)));
3139
3140 if ((SV *)hv == &PL_sv_undef)
3141 {
3142 PUSHMARK (SP);
3143 EXTEND (SP, 2);
3144 PUSHs (sv_Coro);
3145 PUSHs ((SV *)cv_pool_handler);
3146 PUTBACK;
3147 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3148 SPAGAIN;
3149
3150 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3151 }
3152
3153 {
3154 struct coro *coro = SvSTATE_hv (hv);
3155
3156 assert (!coro->invoke_cb);
3157 assert (!coro->invoke_av);
3158 coro->invoke_cb = SvREFCNT_inc (cb);
3159 coro->invoke_av = av;
3160 }
3161
3162 api_ready (aTHX_ (SV *)hv);
3163
3164 if (GIMME_V != G_VOID)
3165 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3166 else
3167 SvREFCNT_dec (hv);
3168}
1336 3169
1337SV * 3170SV *
1338_get_state () 3171rouse_cb ()
3172 PROTOTYPE:
1339 CODE: 3173 CODE:
1340{ 3174 RETVAL = coro_new_rouse_cb (aTHX);
1341 struct io_state *data;
1342
1343 RETVAL = newSV (sizeof (struct io_state));
1344 data = (struct io_state *)SvPVX (RETVAL);
1345 SvCUR_set (RETVAL, sizeof (struct io_state));
1346 SvPOK_only (RETVAL);
1347
1348 data->errorno = errno;
1349 data->laststype = PL_laststype;
1350 data->laststatval = PL_laststatval;
1351 data->statcache = PL_statcache;
1352}
1353 OUTPUT: 3175 OUTPUT:
1354 RETVAL 3176 RETVAL
1355 3177
1356void 3178void
1357_set_state (char *data_) 3179rouse_wait (...)
1358 PROTOTYPE: $ 3180 PROTOTYPE: ;$
3181 PPCODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3183
3184
3185MODULE = Coro::State PACKAGE = PerlIO::cede
3186
3187BOOT:
3188 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3189
3190
3191MODULE = Coro::State PACKAGE = Coro::Semaphore
3192
3193SV *
3194new (SV *klass, SV *count = 0)
1359 CODE: 3195 CODE:
1360{ 3196 RETVAL = sv_bless (
1361 struct io_state *data = (void *)data_; 3197 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3198 GvSTASH (CvGV (cv))
3199 );
3200 OUTPUT:
3201 RETVAL
1362 3202
1363 errno = data->errorno; 3203# helper for Coro::Channel
1364 PL_laststype = data->laststype; 3204SV *
1365 PL_laststatval = data->laststatval; 3205_alloc (int count)
1366 PL_statcache = data->statcache; 3206 CODE:
1367} 3207 RETVAL = coro_waitarray_new (aTHX_ count);
3208 OUTPUT:
3209 RETVAL
1368 3210
3211SV *
3212count (SV *self)
3213 CODE:
3214 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3215 OUTPUT:
3216 RETVAL
3217
3218void
3219up (SV *self, int adjust = 1)
3220 ALIAS:
3221 adjust = 1
3222 CODE:
3223 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3224
3225void
3226down (...)
3227 CODE:
3228 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3229
3230void
3231wait (...)
3232 CODE:
3233 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3234
3235void
3236try (SV *self)
3237 PPCODE:
3238{
3239 AV *av = (AV *)SvRV (self);
3240 SV *count_sv = AvARRAY (av)[0];
3241 IV count = SvIVX (count_sv);
3242
3243 if (count > 0)
3244 {
3245 --count;
3246 SvIVX (count_sv) = count;
3247 XSRETURN_YES;
3248 }
3249 else
3250 XSRETURN_NO;
3251}
3252
3253void
3254waiters (SV *self)
3255 PPCODE:
3256{
3257 AV *av = (AV *)SvRV (self);
3258 int wcount = AvFILLp (av) + 1 - 1;
3259
3260 if (GIMME_V == G_SCALAR)
3261 XPUSHs (sv_2mortal (newSViv (wcount)));
3262 else
3263 {
3264 int i;
3265 EXTEND (SP, wcount);
3266 for (i = 1; i <= wcount; ++i)
3267 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3268 }
3269}
3270
3271MODULE = Coro::State PACKAGE = Coro::Signal
3272
3273SV *
3274new (SV *klass)
3275 CODE:
3276 RETVAL = sv_bless (
3277 coro_waitarray_new (aTHX_ 0),
3278 GvSTASH (CvGV (cv))
3279 );
3280 OUTPUT:
3281 RETVAL
3282
3283void
3284wait (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3287
3288void
3289broadcast (SV *self)
3290 CODE:
3291{
3292 AV *av = (AV *)SvRV (self);
3293 coro_signal_wake (aTHX_ av, AvFILLp (av));
3294}
3295
3296void
3297send (SV *self)
3298 CODE:
3299{
3300 AV *av = (AV *)SvRV (self);
3301
3302 if (AvFILLp (av))
3303 coro_signal_wake (aTHX_ av, 1);
3304 else
3305 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3306}
3307
3308IV
3309awaited (SV *self)
3310 CODE:
3311 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3312 OUTPUT:
3313 RETVAL
3314
3315
3316MODULE = Coro::State PACKAGE = Coro::AnyEvent
3317
3318BOOT:
3319 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3320
3321void
3322_schedule (...)
3323 CODE:
3324{
3325 static int incede;
3326
3327 api_cede_notself (aTHX);
3328
3329 ++incede;
3330 while (coro_nready >= incede && api_cede (aTHX))
3331 ;
3332
3333 sv_setsv (sv_activity, &PL_sv_undef);
3334 if (coro_nready >= incede)
3335 {
3336 PUSHMARK (SP);
3337 PUTBACK;
3338 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3339 }
3340
3341 --incede;
3342}
3343
3344
3345MODULE = Coro::State PACKAGE = Coro::AIO
3346
3347void
3348_register (char *target, char *proto, SV *req)
3349 CODE:
3350{
3351 CV *req_cv = coro_sv_2cv (aTHX_ req);
3352 /* newXSproto doesn't return the CV on 5.8 */
3353 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3354 sv_setpv ((SV *)slf_cv, proto);
3355 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3356}
3357

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