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Comparing Coro/Coro/State.xs (file contents):
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC vs.
Revision 1.321 by root, Sat Nov 22 02:09:54 2008 UTC

1#define CORO_CLONE 1 //D
2
1#include "libcoro/coro.c" 3#include "libcoro/coro.c"
2 4
3#define PERL_NO_GET_CONTEXT 5#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 6#define PERL_EXT
5 7
6#include "EXTERN.h" 8#include "EXTERN.h"
7#include "perl.h" 9#include "perl.h"
8#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
9 12
10#include "patchlevel.h" 13#include "patchlevel.h"
11 14
12#include <stdio.h> 15#include <stdio.h>
13#include <errno.h> 16#include <errno.h>
… …
15 18
16#ifdef WIN32 19#ifdef WIN32
17# undef setjmp 20# undef setjmp
18# undef longjmp 21# undef longjmp
19# undef _exit 22# undef _exit
20# define setjmp _setjmp // deep magic, don't ask 23# define setjmp _setjmp /* deep magic */
21#else 24#else
22# include <inttypes.h> /* most portable stdint.h */ 25# include <inttypes.h> /* most portable stdint.h */
23#endif 26#endif
24 27
25#ifdef HAVE_MMAP 28#ifdef HAVE_MMAP
… …
45# define BOOT_PAGESIZE (void)0 48# define BOOT_PAGESIZE (void)0
46#endif 49#endif
47 50
48#if CORO_USE_VALGRIND 51#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 52# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif 53#endif
54 54
55/* the maximum number of idle cctx that will be pooled */ 55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 56static int cctx_max_idle = 4;
57 57
58#define PERL_VERSION_ATLEAST(a,b,c) \ 58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \ 59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \ 60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \ 61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 62 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
63 63
64#if !PERL_VERSION_ATLEAST (5,6,0) 64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr 65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
67# endif 67# endif
… …
80# ifndef IS_PADCONST 80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
82# endif 82# endif
83#endif 83#endif
84 84
85/* 5.11 */
86#ifndef CxHASARGS
87# define CxHASARGS(cx) (cx)->blk_sub.hasargs
88#endif
89
90/* 5.10.0 */
91#ifndef SvREFCNT_inc_NN
92# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
93#endif
94
85/* 5.8.8 */ 95/* 5.8.8 */
86#ifndef GV_NOTQUAL 96#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0 97# define GV_NOTQUAL 0
88#endif 98#endif
89#ifndef newSV 99#ifndef newSV
90# define newSV(l) NEWSV(0,l) 100# define newSV(l) NEWSV(0,l)
91#endif 101#endif
92 102#ifndef CvISXSUB_on
93/* 5.11 */ 103# define CvISXSUB_on(cv) (void)cv
94#ifndef CxHASARGS 104#endif
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs 105#ifndef CvISXSUB
106# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
107#endif
108#ifndef Newx
109# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
96#endif 110#endif
97 111
98/* 5.8.7 */ 112/* 5.8.7 */
99#ifndef SvRV_set 113#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 114# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 127# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 128#endif
115 129
116/* The next macros try to return the current stack pointer, in an as 130/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */ 131 * portable way as possible. */
132#if __GNUC__ >= 4
133# define dSTACKLEVEL int stacklevel_dummy
134# define STACKLEVEL __builtin_frame_address (0)
135#else
118#define dSTACKLEVEL volatile char stacklevel 136# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 137# define STACKLEVEL ((void *)&stacklevel)
138#endif
120 139
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 140#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 141
123#if __GNUC__ >= 3 142#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 143# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 144# define expect(expr,value) __builtin_expect ((expr),(value))
145# define INLINE static inline
127#else 146#else
128# define attribute(x) 147# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 148# define expect(expr,value) (expr)
149# define INLINE static
131#endif 150#endif
132 151
133#define expect_false(expr) expect ((expr) != 0, 0) 152#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 153#define expect_true(expr) expect ((expr) != 0, 1)
135 154
136#define NOINLINE attribute ((noinline)) 155#define NOINLINE attribute ((noinline))
137 156
138#include "CoroAPI.h" 157#include "CoroAPI.h"
158#define GCoroAPI (&coroapi) /* very sneaky */
139 159
140#ifdef USE_ITHREADS 160#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 161# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 162static void *coro_thx;
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif 163# endif
164#endif
148 165
149/* helper storage struct for Coro::AIO */ 166static double (*nvtime)(); /* so why doesn't it take void? */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157 167
168/* we hijack an hopefully unused CV flag for our purposes */
169#define CVf_SLF 0x4000
170static OP *pp_slf (pTHX);
171
172static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 173static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 174static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 175static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 176static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 177static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 178static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
179
180static AV *av_destroy; /* destruction queue */
181static SV *sv_manager; /* the manager coro */
164 182
165static GV *irsgv; /* $/ */ 183static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 184static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 185static SV *rv_diehook;
168static SV *rv_warnhook; 186static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 187static HV *hv_sig; /* %SIG */
170 188
171/* async_pool helper stuff */ 189/* async_pool helper stuff */
172static SV *sv_pool_rss; 190static SV *sv_pool_rss;
173static SV *sv_pool_size; 191static SV *sv_pool_size;
192static SV *sv_async_pool_idle; /* description string */
174static AV *av_async_pool; 193static AV *av_async_pool; /* idle pool */
194static SV *sv_Coro; /* class string */
195static CV *cv_pool_handler;
196static CV *cv_coro_state_new;
197
198/* Coro::AnyEvent */
199static SV *sv_activity;
175 200
176static struct coro_cctx *cctx_first; 201static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle; 202static int cctx_count, cctx_idle;
178 203
179enum { 204enum {
… …
184 CC_TRACE_LINE = 0x10, /* trace each statement */ 209 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 210 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186}; 211};
187 212
188/* this is a structure representing a c-level coroutine */ 213/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx { 214typedef struct coro_cctx
215{
190 struct coro_cctx *next; 216 struct coro_cctx *next;
191 217
192 /* the stack */ 218 /* the stack */
193 void *sptr; 219 void *sptr;
194 size_t ssize; 220 size_t ssize;
… …
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 224 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env; 225 JMPENV *top_env;
200 coro_context cctx; 226 coro_context cctx;
201 227
228 U32 gen;
202#if CORO_USE_VALGRIND 229#if CORO_USE_VALGRIND
203 int valgrind_id; 230 int valgrind_id;
204#endif 231#endif
205 unsigned char flags; 232 unsigned char flags;
206} coro_cctx; 233} coro_cctx;
… …
211 CF_NEW = 0x0004, /* has never been switched to */ 238 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 239 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213}; 240};
214 241
215/* the structure where most of the perl state is stored, overlaid on the cxstack */ 242/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct { 243typedef struct
244{
217 SV *defsv; 245 SV *defsv;
218 AV *defav; 246 AV *defav;
219 SV *errsv; 247 SV *errsv;
220 SV *irsgv; 248 SV *irsgv;
221#define VAR(name,type) type name; 249#define VAR(name,type) type name;
… …
225 253
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 254#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227 255
228/* this is a structure representing a perl-level coroutine */ 256/* this is a structure representing a perl-level coroutine */
229struct coro { 257struct coro {
230 /* the c coroutine allocated to this perl coroutine, if any */ 258 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx; 259 coro_cctx *cctx;
232 260
233 /* process data */ 261 /* state data */
262 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack; 263 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */ 264 perl_slots *slot; /* basically the saved sp */
236 265
266 CV *startcv; /* the CV to execute */
237 AV *args; /* data associated with this coroutine (initial args) */ 267 AV *args; /* data associated with this coroutine (initial args) */
238 int refcnt; /* coroutines are refcounted, yes */ 268 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */ 269 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */ 270 HV *hv; /* the perl hash associated with this coro, if any */
271 void (*on_destroy)(pTHX_ struct coro *coro);
241 272
242 /* statistics */ 273 /* statistics */
243 int usecount; /* number of transfers to this coro */ 274 int usecount; /* number of transfers to this coro */
244 275
245 /* coro process data */ 276 /* coro process data */
246 int prio; 277 int prio;
247 SV *throw; /* exception to be thrown */ 278 SV *except; /* exception to be thrown */
279 SV *rouse_cb;
248 280
249 /* async_pool */ 281 /* async_pool */
250 SV *saved_deffh; 282 SV *saved_deffh;
283 SV *invoke_cb;
284 AV *invoke_av;
251 285
252 /* linked list */ 286 /* linked list */
253 struct coro *next, *prev; 287 struct coro *next, *prev;
254}; 288};
255 289
256typedef struct coro *Coro__State; 290typedef struct coro *Coro__State;
257typedef struct coro *Coro__State_or_hashref; 291typedef struct coro *Coro__State_or_hashref;
292
293/* the following variables are effectively part of the perl context */
294/* and get copied between struct coro and these variables */
295/* the mainr easonw e don't support windows process emulation */
296static struct CoroSLF slf_frame; /* the current slf frame */
258 297
259/** Coro ********************************************************************/ 298/** Coro ********************************************************************/
260 299
261#define PRIO_MAX 3 300#define PRIO_MAX 3
262#define PRIO_HIGH 1 301#define PRIO_HIGH 1
… …
265#define PRIO_IDLE -3 304#define PRIO_IDLE -3
266#define PRIO_MIN -4 305#define PRIO_MIN -4
267 306
268/* for Coro.pm */ 307/* for Coro.pm */
269static SV *coro_current; 308static SV *coro_current;
309static SV *coro_readyhook;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 310static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
271static int coro_nready; 311static CV *cv_coro_run, *cv_coro_terminate;
272static struct coro *coro_first; 312static struct coro *coro_first;
313#define coro_nready coroapi.nready
273 314
274/** lowlevel stuff **********************************************************/ 315/** lowlevel stuff **********************************************************/
275 316
276static SV * 317static SV *
277coro_get_sv (pTHX_ const char *name, int create) 318coro_get_sv (pTHX_ const char *name, int create)
… …
301 get_hv (name, create); 342 get_hv (name, create);
302#endif 343#endif
303 return get_hv (name, create); 344 return get_hv (name, create);
304} 345}
305 346
347/* may croak */
348INLINE CV *
349coro_sv_2cv (pTHX_ SV *sv)
350{
351 HV *st;
352 GV *gvp;
353 return sv_2cv (sv, &st, &gvp, 0);
354}
355
306static AV * 356static AV *
307coro_clone_padlist (pTHX_ CV *cv) 357coro_derive_padlist (pTHX_ CV *cv)
308{ 358{
309 AV *padlist = CvPADLIST (cv); 359 AV *padlist = CvPADLIST (cv);
310 AV *newpadlist, *newpad; 360 AV *newpadlist, *newpad;
311 361
312 newpadlist = newAV (); 362 newpadlist = newAV ();
… …
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 367 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif 368#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 369 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist); 370 --AvFILLp (padlist);
321 371
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 372 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
323 av_store (newpadlist, 1, (SV *)newpad); 373 av_store (newpadlist, 1, (SV *)newpad);
324 374
325 return newpadlist; 375 return newpadlist;
326} 376}
327 377
… …
357 407
358 /* casting is fun. */ 408 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 409 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist); 410 free_padlist (aTHX_ padlist);
361 411
412 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
413
362 return 0; 414 return 0;
363} 415}
364 416
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext 417#define CORO_MAGIC_type_cv 26
366#define CORO_MAGIC_type_state PERL_MAGIC_ext 418#define CORO_MAGIC_type_state PERL_MAGIC_ext
367 419
368static MGVTBL coro_cv_vtbl = { 420static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0, 421 0, 0, 0, 0,
370 coro_cv_free 422 coro_cv_free
371}; 423};
372 424
425#define CORO_MAGIC_NN(sv, type) \
426 (expect_true (SvMAGIC (sv)->mg_type == type) \
427 ? SvMAGIC (sv) \
428 : mg_find (sv, type))
429
373#define CORO_MAGIC(sv,type) \ 430#define CORO_MAGIC(sv, type) \
374 SvMAGIC (sv) \ 431 (expect_true (SvMAGIC (sv)) \
375 ? SvMAGIC (sv)->mg_type == type \ 432 ? CORO_MAGIC_NN (sv, type) \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0 433 : 0)
379 434
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 435#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
381#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 436#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
382 437
383static struct coro * 438INLINE struct coro *
384SvSTATE_ (pTHX_ SV *coro) 439SvSTATE_ (pTHX_ SV *coro)
385{ 440{
386 HV *stash; 441 HV *stash;
387 MAGIC *mg; 442 MAGIC *mg;
388 443
… …
403 mg = CORO_MAGIC_state (coro); 458 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr; 459 return (struct coro *)mg->mg_ptr;
405} 460}
406 461
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 462#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
463
464/* faster than SvSTATE, but expects a coroutine hv */
465#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
466#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408 467
409/* the next two functions merely cache the padlists */ 468/* the next two functions merely cache the padlists */
410static void 469static void
411get_padlist (pTHX_ CV *cv) 470get_padlist (pTHX_ CV *cv)
412{ 471{
… …
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 475 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 476 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else 477 else
419 { 478 {
420#if CORO_PREFER_PERL_FUNCTIONS 479#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */ 480 /* this is probably cleaner? but also slower! */
481 /* in practise, it seems to be less stable */
422 CV *cp = Perl_cv_clone (cv); 482 CV *cp = Perl_cv_clone (aTHX_ cv);
423 CvPADLIST (cv) = CvPADLIST (cp); 483 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0; 484 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp); 485 SvREFCNT_dec (cp);
426#else 486#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 487 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
428#endif 488#endif
429 } 489 }
430} 490}
431 491
432static void 492static void
… …
478 CvPADLIST (cv) = (AV *)POPs; 538 CvPADLIST (cv) = (AV *)POPs;
479 } 539 }
480 540
481 PUTBACK; 541 PUTBACK;
482 } 542 }
543
544 slf_frame = c->slf_frame;
545 CORO_THROW = c->except;
483} 546}
484 547
485static void 548static void
486save_perl (pTHX_ Coro__State c) 549save_perl (pTHX_ Coro__State c)
487{ 550{
551 c->except = CORO_THROW;
552 c->slf_frame = slf_frame;
553
488 { 554 {
489 dSP; 555 dSP;
490 I32 cxix = cxstack_ix; 556 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack; 557 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo; 558 PERL_SI *top_si = PL_curstackinfo;
… …
510 576
511 if (expect_true (CvDEPTH (cv))) 577 if (expect_true (CvDEPTH (cv)))
512 { 578 {
513 EXTEND (SP, 3); 579 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv)); 580 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 581 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516 PUSHs ((SV *)cv); 582 PUSHs ((SV *)cv);
517 583
518 CvDEPTH (cv) = 0; 584 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv); 585 get_padlist (aTHX_ cv);
520 } 586 }
… …
559 #undef VAR 625 #undef VAR
560 } 626 }
561} 627}
562 628
563/* 629/*
564 * allocate various perl stacks. This is an exact copy 630 * allocate various perl stacks. This is almost an exact copy
565 * of perl.c:init_stacks, except that it uses less memory 631 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do 632 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace. 633 * not usually need a lot of stackspace.
568 */ 634 */
569#if CORO_PREFER_PERL_FUNCTIONS 635#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks 636# define coro_init_stacks(thx) init_stacks ()
571#else 637#else
572static void 638static void
573coro_init_stacks (pTHX) 639coro_init_stacks (pTHX)
574{ 640{
575 PL_curstackinfo = new_stackinfo(32, 8); 641 PL_curstackinfo = new_stackinfo(32, 8);
… …
612 678
613/* 679/*
614 * destroy the stacks, the callchain etc... 680 * destroy the stacks, the callchain etc...
615 */ 681 */
616static void 682static void
617coro_destroy_stacks (pTHX) 683coro_destruct_stacks (pTHX)
618{ 684{
619 while (PL_curstackinfo->si_next) 685 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next; 686 PL_curstackinfo = PL_curstackinfo->si_next;
621 687
622 while (PL_curstackinfo) 688 while (PL_curstackinfo)
… …
638#if !PERL_VERSION_ATLEAST (5,10,0) 704#if !PERL_VERSION_ATLEAST (5,10,0)
639 Safefree (PL_retstack); 705 Safefree (PL_retstack);
640#endif 706#endif
641} 707}
642 708
709#define CORO_RSS \
710 rss += sizeof (SYM (curstackinfo)); \
711 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
713 rss += SYM (tmps_max) * sizeof (SV *); \
714 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
715 rss += SYM (scopestack_max) * sizeof (I32); \
716 rss += SYM (savestack_max) * sizeof (ANY);
717
643static size_t 718static size_t
644coro_rss (pTHX_ struct coro *coro) 719coro_rss (pTHX_ struct coro *coro)
645{ 720{
646 size_t rss = sizeof (*coro); 721 size_t rss = sizeof (*coro);
647 722
648 if (coro->mainstack) 723 if (coro->mainstack)
649 { 724 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING) 725 if (coro->flags & CF_RUNNING)
654 { 726 {
655 slot = &tmp_slot; 727 #define SYM(sym) PL_ ## sym
656 728 CORO_RSS;
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR 729 #undef SYM
660 } 730 }
661 else 731 else
662 slot = coro->slot; 732 {
663 733 #define SYM(sym) coro->slot->sym
664 rss += sizeof (slot->curstackinfo); 734 CORO_RSS;
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 735 #undef SYM
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 736 }
667 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY);
671
672#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *);
674#endif
675 } 737 }
676 738
677 return rss; 739 return rss;
678} 740}
679 741
680/** coroutine stack handling ************************************************/ 742/** coroutine stack handling ************************************************/
681 743
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 744static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 745static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
746static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
747
748/* apparently < 5.8.8 */
749#ifndef MgPV_nolen_const
750#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
751 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
752 (const char*)(mg)->mg_ptr)
753#endif
684 754
685/* 755/*
686 * This overrides the default magic get method of %SIG elements. 756 * This overrides the default magic get method of %SIG elements.
687 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 757 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
688 * and instead of tryign to save and restore the hash elements, we just provide 758 * and instead of tryign to save and restore the hash elements, we just provide
… …
696{ 766{
697 const char *s = MgPV_nolen_const (mg); 767 const char *s = MgPV_nolen_const (mg);
698 768
699 if (*s == '_') 769 if (*s == '_')
700 { 770 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 771 SV **svp = 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
779 return 0;
780 }
703 } 781 }
704 782
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 783 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
784}
785
786static int
787coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
788{
789 const char *s = MgPV_nolen_const (mg);
790
791 if (*s == '_')
792 {
793 SV **svp = 0;
794
795 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
796 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
797
798 if (svp)
799 {
800 SV *old = *svp;
801 *svp = 0;
802 SvREFCNT_dec (old);
803 return 0;
804 }
805 }
806
807 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
706} 808}
707 809
708static int 810static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 811coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710{ 812{
… …
728 830
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 831 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730} 832}
731 833
732static void 834static void
835prepare_nop (pTHX_ struct coro_transfer_args *ta)
836{
837 /* kind of mega-hacky, but works */
838 ta->next = ta->prev = (struct coro *)ta;
839}
840
841static int
842slf_check_nop (pTHX_ struct CoroSLF *frame)
843{
844 return 0;
845}
846
847static int
848slf_check_repeat (pTHX_ struct CoroSLF *frame)
849{
850 return 1;
851}
852
853static UNOP coro_setup_op;
854
855static void NOINLINE /* noinline to keep it out of the transfer fast path */
733coro_setup (pTHX_ struct coro *coro) 856coro_setup (pTHX_ struct coro *coro)
734{ 857{
735 /* 858 /*
736 * emulate part of the perl startup here. 859 * emulate part of the perl startup here.
737 */ 860 */
… …
757 GvSV (PL_defgv) = newSV (0); 880 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0; 881 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0); 882 GvSV (PL_errgv) = newSV (0);
760 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 883 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
761 PL_rs = newSVsv (GvSV (irsgv)); 884 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 885 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763 886
764 { 887 {
765 dSP; 888 dSP;
766 LOGOP myop; 889 UNOP myop;
767 890
768 Zero (&myop, 1, LOGOP); 891 Zero (&myop, 1, UNOP);
769 myop.op_next = Nullop; 892 myop.op_next = Nullop;
893 myop.op_type = OP_ENTERSUB;
770 myop.op_flags = OPf_WANT_VOID; 894 myop.op_flags = OPf_WANT_VOID;
771 895
772 PUSHMARK (SP); 896 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 897 PUSHs ((SV *)coro->startcv);
774 PUTBACK; 898 PUTBACK;
775 PL_op = (OP *)&myop; 899 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 900 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN;
778 } 901 }
779 902
780 /* this newly created coroutine might be run on an existing cctx which most 903 /* this newly created coroutine might be run on an existing cctx which most
781 * likely was suspended in set_stacklevel, called from entersub. 904 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
782 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783 * so we ENTER here for symmetry
784 */ 905 */
785 ENTER; 906 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
786} 907 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
787 908
909 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
910 coro_setup_op.op_next = PL_op;
911 coro_setup_op.op_type = OP_ENTERSUB;
912 coro_setup_op.op_ppaddr = pp_slf;
913 /* no flags etc. required, as an init function won't be called */
914
915 PL_op = (OP *)&coro_setup_op;
916
917 /* copy throw, in case it was set before coro_setup */
918 CORO_THROW = coro->except;
919}
920
788static void 921static void
789coro_destroy (pTHX_ struct coro *coro) 922coro_destruct (pTHX_ struct coro *coro)
790{ 923{
791 if (!IN_DESTRUCT) 924 if (!IN_DESTRUCT)
792 { 925 {
793 /* restore all saved variables and stuff */ 926 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0); 927 LEAVE_SCOPE (0);
… …
814 947
815 SvREFCNT_dec (PL_diehook); 948 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook); 949 SvREFCNT_dec (PL_warnhook);
817 950
818 SvREFCNT_dec (coro->saved_deffh); 951 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw); 952 SvREFCNT_dec (coro->rouse_cb);
953 SvREFCNT_dec (coro->invoke_cb);
954 SvREFCNT_dec (coro->invoke_av);
820 955
821 coro_destroy_stacks (aTHX); 956 coro_destruct_stacks (aTHX);
822} 957}
823 958
824static void 959INLINE void
825free_coro_mortal (pTHX) 960free_coro_mortal (pTHX)
826{ 961{
827 if (expect_true (coro_mortal)) 962 if (expect_true (coro_mortal))
828 { 963 {
829 SvREFCNT_dec (coro_mortal); 964 SvREFCNT_dec (coro_mortal);
… …
834static int 969static int
835runops_trace (pTHX) 970runops_trace (pTHX)
836{ 971{
837 COP *oldcop = 0; 972 COP *oldcop = 0;
838 int oldcxix = -2; 973 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 974 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx; 975 coro_cctx *cctx = coro->cctx;
841 976
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 977 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 { 978 {
844 PERL_ASYNC_CHECK (); 979 PERL_ASYNC_CHECK ();
… …
863 : cx->blk_gimme == G_SCALAR ? bot + 1 998 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot; 999 : bot;
865 1000
866 av_extend (av, top - bot); 1001 av_extend (av, top - bot);
867 while (bot < top) 1002 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++)); 1003 av_push (av, SvREFCNT_inc_NN (*bot++));
869 1004
870 PL_runops = RUNOPS_DEFAULT; 1005 PL_runops = RUNOPS_DEFAULT;
871 ENTER; 1006 ENTER;
872 SAVETMPS; 1007 SAVETMPS;
873 EXTEND (SP, 3); 1008 EXTEND (SP, 3);
… …
896 { 1031 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1032 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 1033
899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1034 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
900 { 1035 {
901 runops_proc_t old_runops = PL_runops;
902 dSP; 1036 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv); 1037 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0)); 1038 SV *fullname = sv_2mortal (newSV (0));
905 1039
906 if (isGV (gv)) 1040 if (isGV (gv))
… …
911 SAVETMPS; 1045 SAVETMPS;
912 EXTEND (SP, 3); 1046 EXTEND (SP, 3);
913 PUSHMARK (SP); 1047 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes); 1048 PUSHs (&PL_sv_yes);
915 PUSHs (fullname); 1049 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1050 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK; 1051 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1052 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
919 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1053 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN; 1054 SPAGAIN;
921 FREETMPS; 1055 FREETMPS;
… …
953 1087
954 TAINT_NOT; 1088 TAINT_NOT;
955 return 0; 1089 return 0;
956} 1090}
957 1091
958/* inject a fake call to Coro::State::_cctx_init into the execution */ 1092static struct coro_cctx *cctx_ssl_cctx;
959/* _cctx_init should be careful, as it could be called at almost any time */ 1093static struct CoroSLF cctx_ssl_frame;
960/* during execution of a perl program */ 1094
1095static void
1096slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1097{
1098 ta->prev = (struct coro *)cctx_ssl_cctx;
1099 ta->next = 0;
1100}
1101
1102static int
1103slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1104{
1105 *frame = cctx_ssl_frame;
1106
1107 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1108}
1109
1110/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
961static void NOINLINE 1111static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx) 1112cctx_prepare (pTHX_ coro_cctx *cctx)
963{ 1113{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env; 1114 PL_top_env = &PL_start_env;
968 1115
969 if (cctx->flags & CC_TRACE) 1116 if (cctx->flags & CC_TRACE)
970 PL_runops = runops_trace; 1117 PL_runops = runops_trace;
971 1118
972 Zero (&myop, 1, LOGOP); 1119 /* we already must be executing an SLF op, there is no other valid way
973 myop.op_next = PL_op; 1120 * that can lead to creation of a new cctx */
974 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1121 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1122 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
975 1123
976 PUSHMARK (SP); 1124 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
977 EXTEND (SP, 2); 1125 cctx_ssl_cctx = cctx;
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1126 cctx_ssl_frame = slf_frame;
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1127
980 PUTBACK; 1128 slf_frame.prepare = slf_prepare_set_stacklevel;
981 PL_op = (OP *)&myop; 1129 slf_frame.check = slf_check_set_stacklevel;
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1130}
983 SPAGAIN; 1131
1132/* the tail of transfer: execute stuff we can only do after a transfer */
1133INLINE void
1134transfer_tail (pTHX)
1135{
1136 free_coro_mortal (aTHX);
984} 1137}
985 1138
986/* 1139/*
987 * this is a _very_ stripped down perl interpreter ;) 1140 * this is a _very_ stripped down perl interpreter ;)
988 */ 1141 */
989static void 1142static void
990cctx_run (void *arg) 1143cctx_run (void *arg)
991{ 1144{
1145#ifdef USE_ITHREADS
1146# if CORO_PTHREAD
1147 PERL_SET_CONTEXT (coro_thx);
1148# endif
1149#endif
1150 {
992 dTHX; 1151 dTHX;
993 1152
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1153 /* normally we would need to skip the entersub here */
995 UNLOCK; 1154 /* not doing so will re-execute it, which is exactly what we want */
996
997 /* we now skip the entersub that lead to transfer() */
998 PL_op = PL_op->op_next; 1155 /* PL_nop = PL_nop->op_next */
999 1156
1000 /* inject a fake subroutine call to cctx_init */ 1157 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg); 1158 cctx_prepare (aTHX_ (coro_cctx *)arg);
1002 1159
1160 /* cctx_run is the alternative tail of transfer() */
1161 transfer_tail (aTHX);
1162
1003 /* somebody or something will hit me for both perl_run and PL_restartop */ 1163 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op; 1164 PL_restartop = PL_op;
1005 perl_run (PL_curinterp); 1165 perl_run (PL_curinterp);
1006
1007 /* 1166 /*
1167 * Unfortunately, there is no way to get at the return values of the
1168 * coro body here, as perl_run destroys these
1169 */
1170
1171 /*
1008 * If perl-run returns we assume exit() was being called or the coro 1172 * If perl-run returns we assume exit() was being called or the coro
1009 * fell off the end, which seems to be the only valid (non-bug) 1173 * fell off the end, which seems to be the only valid (non-bug)
1010 * reason for perl_run to return. We try to exit by jumping to the 1174 * reason for perl_run to return. We try to exit by jumping to the
1011 * bootstrap-time "top" top_env, as we cannot restore the "main" 1175 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept 1176 * coroutine as Coro has no such concept
1013 */ 1177 */
1014 PL_top_env = main_top_env; 1178 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1179 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1180 }
1016} 1181}
1017 1182
1018static coro_cctx * 1183static coro_cctx *
1019cctx_new () 1184cctx_new ()
1020{ 1185{
1021 coro_cctx *cctx; 1186 coro_cctx *cctx;
1187
1188 ++cctx_count;
1189 New (0, cctx, 1, coro_cctx);
1190
1191 cctx->gen = cctx_gen;
1192 cctx->flags = 0;
1193 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1194
1195 return cctx;
1196}
1197
1198/* create a new cctx only suitable as source */
1199static coro_cctx *
1200cctx_new_empty ()
1201{
1202 coro_cctx *cctx = cctx_new ();
1203
1204 cctx->sptr = 0;
1205 coro_create (&cctx->cctx, 0, 0, 0, 0);
1206
1207 return cctx;
1208}
1209
1210/* create a new cctx suitable as destination/running a perl interpreter */
1211static coro_cctx *
1212cctx_new_run ()
1213{
1214 coro_cctx *cctx = cctx_new ();
1022 void *stack_start; 1215 void *stack_start;
1023 size_t stack_size; 1216 size_t stack_size;
1024 1217
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP 1218#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1219 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */ 1220 /* mmap supposedly does allocate-on-write for us */
1032 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1221 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033 1222
1034 if (cctx->sptr != (void *)-1) 1223 if (cctx->sptr != (void *)-1)
1035 { 1224 {
1036# if CORO_STACKGUARD 1225 #if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1226 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif 1227 #endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1228 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1229 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED; 1230 cctx->flags |= CC_MAPPED;
1042 } 1231 }
1043 else 1232 else
1044#endif 1233#endif
1045 { 1234 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long); 1235 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long); 1236 New (0, cctx->sptr, cctx_stacksize, long);
1048 1237
1049 if (!cctx->sptr) 1238 if (!cctx->sptr)
1050 { 1239 {
1051 perror ("FATAL: unable to allocate stack for coroutine"); 1240 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052 _exit (EXIT_FAILURE); 1241 _exit (EXIT_FAILURE);
1053 } 1242 }
1054 1243
1055 stack_start = cctx->sptr; 1244 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize; 1245 stack_size = cctx->ssize;
1057 } 1246 }
1058 1247
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1248 #if CORO_USE_VALGRIND
1249 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1250 #endif
1251
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1252 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061 1253
1062 return cctx; 1254 return cctx;
1063} 1255}
1064 1256
… …
1067{ 1259{
1068 if (!cctx) 1260 if (!cctx)
1069 return; 1261 return;
1070 1262
1071 --cctx_count; 1263 --cctx_count;
1264 coro_destroy (&cctx->cctx);
1072 1265
1266 /* coro_transfer creates new, empty cctx's */
1267 if (cctx->sptr)
1268 {
1073#if CORO_USE_VALGRIND 1269 #if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1270 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif 1271 #endif
1076 1272
1077#if HAVE_MMAP 1273#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED) 1274 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize); 1275 munmap (cctx->sptr, cctx->ssize);
1080 else 1276 else
1081#endif 1277#endif
1082 Safefree (cctx->sptr); 1278 Safefree (cctx->sptr);
1279 }
1083 1280
1084 Safefree (cctx); 1281 Safefree (cctx);
1085} 1282}
1086 1283
1087/* wether this cctx should be destructed */ 1284/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1285#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1089 1286
1090static coro_cctx * 1287static coro_cctx *
1091cctx_get (pTHX) 1288cctx_get (pTHX)
1092{ 1289{
1093 while (expect_true (cctx_first)) 1290 while (expect_true (cctx_first))
… …
1100 return cctx; 1297 return cctx;
1101 1298
1102 cctx_destroy (cctx); 1299 cctx_destroy (cctx);
1103 } 1300 }
1104 1301
1105 return cctx_new (); 1302 return cctx_new_run ();
1106} 1303}
1107 1304
1108static void 1305static void
1109cctx_put (coro_cctx *cctx) 1306cctx_put (coro_cctx *cctx)
1110{ 1307{
1308 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1309
1111 /* free another cctx if overlimit */ 1310 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1311 if (expect_false (cctx_idle >= cctx_max_idle))
1113 { 1312 {
1114 coro_cctx *first = cctx_first; 1313 coro_cctx *first = cctx_first;
1115 cctx_first = first->next; 1314 cctx_first = first->next;
1116 --cctx_idle; 1315 --cctx_idle;
1117 1316
… …
1126/** coroutine switching *****************************************************/ 1325/** coroutine switching *****************************************************/
1127 1326
1128static void 1327static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next) 1328transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{ 1329{
1330 /* TODO: throwing up here is considered harmful */
1331
1131 if (expect_true (prev != next)) 1332 if (expect_true (prev != next))
1132 { 1333 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1334 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1335 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1135 1336
1136 if (expect_false (next->flags & CF_RUNNING)) 1337 if (expect_false (next->flags & CF_RUNNING))
1137 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1338 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1138 1339
1139 if (expect_false (next->flags & CF_DESTROYED)) 1340 if (expect_false (next->flags & CF_DESTROYED))
1140 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1341 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1141 1342
1142#if !PERL_VERSION_ATLEAST (5,10,0) 1343#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1344 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1345 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1145#endif 1346#endif
1146 } 1347 }
1147} 1348}
1148 1349
1149/* always use the TRANSFER macro */ 1350/* always use the TRANSFER macro */
1150static void NOINLINE 1351static void NOINLINE /* noinline so we have a fixed stackframe */
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1352transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{ 1353{
1153 dSTACKLEVEL; 1354 dSTACKLEVEL;
1154 static volatile int has_throw;
1155 1355
1156 /* sometimes transfer is only called to set idle_sp */ 1356 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next)) 1357 if (expect_false (!next))
1158 { 1358 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1359 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1163 { 1363 {
1164 coro_cctx *prev__cctx; 1364 coro_cctx *prev__cctx;
1165 1365
1166 if (expect_false (prev->flags & CF_NEW)) 1366 if (expect_false (prev->flags & CF_NEW))
1167 { 1367 {
1168 /* create a new empty context */ 1368 /* create a new empty/source context */
1169 Newz (0, prev->cctx, 1, coro_cctx); 1369 prev->cctx = cctx_new_empty ();
1170 prev->flags &= ~CF_NEW; 1370 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING; 1371 prev->flags |= CF_RUNNING;
1172 } 1372 }
1173 1373
1174 prev->flags &= ~CF_RUNNING; 1374 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING; 1375 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178 1376
1179 /* first get rid of the old state */ 1377 /* first get rid of the old state */
1180 save_perl (aTHX_ prev); 1378 save_perl (aTHX_ prev);
1181 1379
1182 if (expect_false (next->flags & CF_NEW)) 1380 if (expect_false (next->flags & CF_NEW))
… …
1189 else 1387 else
1190 load_perl (aTHX_ next); 1388 load_perl (aTHX_ next);
1191 1389
1192 prev__cctx = prev->cctx; 1390 prev__cctx = prev->cctx;
1193 1391
1194 /* possibly "free" the cctx */ 1392 /* possibly untie and reuse the cctx */
1195 if (expect_true ( 1393 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL 1394 prev__cctx->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE) 1395 && !(prev__cctx->flags & CC_TRACE)
1198 && !force_cctx 1396 && !force_cctx
1199 )) 1397 ))
1200 { 1398 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1399 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1202 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1400 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1203 1401
1204 prev->cctx = 0; 1402 prev->cctx = 0;
1205 1403
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1404 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1207 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1405 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1214 1412
1215 ++next->usecount; 1413 ++next->usecount;
1216 1414
1217 if (expect_true (!next->cctx)) 1415 if (expect_true (!next->cctx))
1218 next->cctx = cctx_get (aTHX); 1416 next->cctx = cctx_get (aTHX);
1219
1220 has_throw = !!next->throw;
1221 1417
1222 if (expect_false (prev__cctx != next->cctx)) 1418 if (expect_false (prev__cctx != next->cctx))
1223 { 1419 {
1224 prev__cctx->top_env = PL_top_env; 1420 prev__cctx->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env; 1421 PL_top_env = next->cctx->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1422 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1227 } 1423 }
1228 1424
1229 free_coro_mortal (aTHX); 1425 transfer_tail (aTHX);
1230 UNLOCK;
1231
1232 if (expect_false (has_throw))
1233 {
1234 struct coro *coro = SvSTATE (coro_current);
1235
1236 if (coro->throw)
1237 {
1238 SV *exception = coro->throw;
1239 coro->throw = 0;
1240 sv_setsv (ERRSV, exception);
1241 croak (0);
1242 }
1243 }
1244 } 1426 }
1245} 1427}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251 1428
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1429#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1253#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1430#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254 1431
1255/** high level stuff ********************************************************/ 1432/** high level stuff ********************************************************/
… …
1257static int 1434static int
1258coro_state_destroy (pTHX_ struct coro *coro) 1435coro_state_destroy (pTHX_ struct coro *coro)
1259{ 1436{
1260 if (coro->flags & CF_DESTROYED) 1437 if (coro->flags & CF_DESTROYED)
1261 return 0; 1438 return 0;
1439
1440 if (coro->on_destroy)
1441 coro->on_destroy (aTHX_ coro);
1262 1442
1263 coro->flags |= CF_DESTROYED; 1443 coro->flags |= CF_DESTROYED;
1264 1444
1265 if (coro->flags & CF_READY) 1445 if (coro->flags & CF_READY)
1266 { 1446 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1447 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */ 1448 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready; 1449 --coro_nready;
1271 UNLOCK;
1272 } 1450 }
1273 else 1451 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1452 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275 1453
1276 if (coro->mainstack && coro->mainstack != main_mainstack) 1454 if (coro->mainstack && coro->mainstack != main_mainstack)
1277 { 1455 {
1278 struct coro temp; 1456 struct coro temp;
1279 1457
1280 if (coro->flags & CF_RUNNING) 1458 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282 1459
1283 save_perl (aTHX_ &temp); 1460 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro); 1461 load_perl (aTHX_ coro);
1285 1462
1286 coro_destroy (aTHX_ coro); 1463 coro_destruct (aTHX_ coro);
1287 1464
1288 load_perl (aTHX_ &temp); 1465 load_perl (aTHX_ &temp);
1289 1466
1290 coro->slot = 0; 1467 coro->slot = 0;
1291 } 1468 }
1292 1469
1293 cctx_destroy (coro->cctx); 1470 cctx_destroy (coro->cctx);
1471 SvREFCNT_dec (coro->startcv);
1294 SvREFCNT_dec (coro->args); 1472 SvREFCNT_dec (coro->args);
1473 SvREFCNT_dec (CORO_THROW);
1295 1474
1296 if (coro->next) coro->next->prev = coro->prev; 1475 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next; 1476 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next; 1477 if (coro == coro_first) coro_first = coro->next;
1299 1478
… …
1337# define MGf_DUP 0 1516# define MGf_DUP 0
1338#endif 1517#endif
1339}; 1518};
1340 1519
1341static void 1520static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1521prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{ 1522{
1344 ta->prev = SvSTATE (prev_sv); 1523 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv); 1524 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta); 1525 TRANSFER_CHECK (*ta);
1347} 1526}
1348 1527
1349static void 1528static void
1350api_transfer (SV *prev_sv, SV *next_sv) 1529api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351{ 1530{
1352 dTHX;
1353 struct transfer_args ta; 1531 struct coro_transfer_args ta;
1354 1532
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1533 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1); 1534 TRANSFER (ta, 1);
1357} 1535}
1358 1536
1537/*****************************************************************************/
1538/* gensub: simple closure generation utility */
1539
1540#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1541
1542/* create a closure from XS, returns a code reference */
1543/* the arg can be accessed via GENSUB_ARG from the callback */
1544/* the callback must use dXSARGS/XSRETURN */
1545static SV *
1546gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1547{
1548 CV *cv = (CV *)newSV (0);
1549
1550 sv_upgrade ((SV *)cv, SVt_PVCV);
1551
1552 CvANON_on (cv);
1553 CvISXSUB_on (cv);
1554 CvXSUB (cv) = xsub;
1555 GENSUB_ARG = arg;
1556
1557 return newRV_noinc ((SV *)cv);
1558}
1559
1359/** Coro ********************************************************************/ 1560/** Coro ********************************************************************/
1360 1561
1361static void 1562INLINE void
1362coro_enq (pTHX_ SV *coro_sv) 1563coro_enq (pTHX_ struct coro *coro)
1363{ 1564{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1565 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1365} 1566}
1366 1567
1367static SV * 1568INLINE SV *
1368coro_deq (pTHX) 1569coro_deq (pTHX)
1369{ 1570{
1370 int prio; 1571 int prio;
1371 1572
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1573 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1375 1576
1376 return 0; 1577 return 0;
1377} 1578}
1378 1579
1379static int 1580static int
1380api_ready (SV *coro_sv) 1581api_ready (pTHX_ SV *coro_sv)
1381{ 1582{
1382 dTHX;
1383 struct coro *coro; 1583 struct coro *coro;
1584 SV *sv_hook;
1585 void (*xs_hook)(void);
1384 1586
1385 if (SvROK (coro_sv)) 1587 if (SvROK (coro_sv))
1386 coro_sv = SvRV (coro_sv); 1588 coro_sv = SvRV (coro_sv);
1387 1589
1388 coro = SvSTATE (coro_sv); 1590 coro = SvSTATE (coro_sv);
… …
1390 if (coro->flags & CF_READY) 1592 if (coro->flags & CF_READY)
1391 return 0; 1593 return 0;
1392 1594
1393 coro->flags |= CF_READY; 1595 coro->flags |= CF_READY;
1394 1596
1395 LOCK; 1597 sv_hook = coro_nready ? 0 : coro_readyhook;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1598 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1599
1600 coro_enq (aTHX_ coro);
1397 ++coro_nready; 1601 ++coro_nready;
1398 UNLOCK; 1602
1603 if (sv_hook)
1604 {
1605 dSP;
1606
1607 ENTER;
1608 SAVETMPS;
1609
1610 PUSHMARK (SP);
1611 PUTBACK;
1612 call_sv (sv_hook, G_VOID | G_DISCARD);
1613
1614 FREETMPS;
1615 LEAVE;
1616 }
1617
1618 if (xs_hook)
1619 xs_hook ();
1399 1620
1400 return 1; 1621 return 1;
1401} 1622}
1402 1623
1403static int 1624static int
1404api_is_ready (SV *coro_sv) 1625api_is_ready (pTHX_ SV *coro_sv)
1405{ 1626{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1627 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408} 1628}
1409 1629
1630/* expects to own a reference to next->hv */
1631INLINE void
1632prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1633{
1634 SV *prev_sv = SvRV (coro_current);
1635
1636 ta->prev = SvSTATE_hv (prev_sv);
1637 ta->next = next;
1638
1639 TRANSFER_CHECK (*ta);
1640
1641 SvRV_set (coro_current, (SV *)next->hv);
1642
1643 free_coro_mortal (aTHX);
1644 coro_mortal = prev_sv;
1645}
1646
1410static void 1647static void
1411prepare_schedule (pTHX_ struct transfer_args *ta) 1648prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1412{ 1649{
1413 SV *prev_sv, *next_sv;
1414
1415 for (;;) 1650 for (;;)
1416 { 1651 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX); 1652 SV *next_sv = coro_deq (aTHX);
1419 1653
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv)) 1654 if (expect_true (next_sv))
1422 { 1655 {
1656 struct coro *next = SvSTATE_hv (next_sv);
1657
1658 /* cannot transfer to destroyed coros, skip and look for next */
1659 if (expect_false (next->flags & CF_DESTROYED))
1660 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1661 else
1662 {
1663 next->flags &= ~CF_READY;
1664 --coro_nready;
1665
1666 prepare_schedule_to (aTHX_ ta, next);
1667 break;
1668 }
1669 }
1670 else
1671 {
1672 /* nothing to schedule: call the idle handler */
1423 dSP; 1673 dSP;
1424 UNLOCK;
1425 1674
1426 ENTER; 1675 ENTER;
1427 SAVETMPS; 1676 SAVETMPS;
1428 1677
1429 PUSHMARK (SP); 1678 PUSHMARK (SP);
1430 PUTBACK; 1679 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1680 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1432 SPAGAIN;
1433 1681
1434 FREETMPS; 1682 FREETMPS;
1435 LEAVE; 1683 LEAVE;
1436 continue;
1437 } 1684 }
1438
1439 ta->next = SvSTATE (next_sv);
1440
1441 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */
1447 continue;
1448 }
1449
1450 --coro_nready;
1451 UNLOCK;
1452 break;
1453 } 1685 }
1454
1455 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current);
1457 ta->prev = SvSTATE (prev_sv);
1458 TRANSFER_CHECK (*ta);
1459 assert (ta->next->flags & CF_READY);
1460 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv);
1462
1463 LOCK;
1464 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv;
1466 UNLOCK;
1467} 1686}
1468 1687
1469static void 1688INLINE void
1470prepare_cede (pTHX_ struct transfer_args *ta) 1689prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471{ 1690{
1472 api_ready (coro_current); 1691 api_ready (aTHX_ coro_current);
1473 prepare_schedule (aTHX_ ta); 1692 prepare_schedule (aTHX_ ta);
1474} 1693}
1475 1694
1695INLINE void
1696prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1697{
1698 SV *prev = SvRV (coro_current);
1699
1700 if (coro_nready)
1701 {
1702 prepare_schedule (aTHX_ ta);
1703 api_ready (aTHX_ prev);
1704 }
1705 else
1706 prepare_nop (aTHX_ ta);
1707}
1708
1709static void
1710api_schedule (pTHX)
1711{
1712 struct coro_transfer_args ta;
1713
1714 prepare_schedule (aTHX_ &ta);
1715 TRANSFER (ta, 1);
1716}
1717
1718static void
1719api_schedule_to (pTHX_ SV *coro_sv)
1720{
1721 struct coro_transfer_args ta;
1722 struct coro *next = SvSTATE (coro_sv);
1723
1724 SvREFCNT_inc_NN (coro_sv);
1725 prepare_schedule_to (aTHX_ &ta, next);
1726}
1727
1476static int 1728static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta) 1729api_cede (pTHX)
1478{ 1730{
1479 if (coro_nready) 1731 struct coro_transfer_args ta;
1480 { 1732
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta); 1733 prepare_cede (aTHX_ &ta);
1483 api_ready (prev); 1734
1735 if (expect_true (ta.prev != ta.next))
1736 {
1737 TRANSFER (ta, 1);
1484 return 1; 1738 return 1;
1485 } 1739 }
1486 else 1740 else
1487 return 0; 1741 return 0;
1488} 1742}
1489 1743
1490static void
1491api_schedule (void)
1492{
1493 dTHX;
1494 struct transfer_args ta;
1495
1496 prepare_schedule (aTHX_ &ta);
1497 TRANSFER (ta, 1);
1498}
1499
1500static int 1744static int
1501api_cede (void) 1745api_cede_notself (pTHX)
1502{ 1746{
1503 dTHX; 1747 if (coro_nready)
1748 {
1504 struct transfer_args ta; 1749 struct coro_transfer_args ta;
1505 1750
1506 prepare_cede (aTHX_ &ta); 1751 prepare_cede_notself (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1); 1752 TRANSFER (ta, 1);
1511 return 1; 1753 return 1;
1512 } 1754 }
1513 else 1755 else
1514 return 0; 1756 return 0;
1515} 1757}
1516 1758
1517static int 1759static void
1518api_cede_notself (void)
1519{
1520 dTHX;
1521 struct transfer_args ta;
1522
1523 if (prepare_cede_notself (aTHX_ &ta))
1524 {
1525 TRANSFER (ta, 1);
1526 return 1;
1527 }
1528 else
1529 return 0;
1530}
1531
1532static void
1533api_trace (SV *coro_sv, int flags) 1760api_trace (pTHX_ SV *coro_sv, int flags)
1534{ 1761{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv); 1762 struct coro *coro = SvSTATE (coro_sv);
1537 1763
1538 if (flags & CC_TRACE) 1764 if (flags & CC_TRACE)
1539 { 1765 {
1540 if (!coro->cctx) 1766 if (!coro->cctx)
1541 coro->cctx = cctx_new (); 1767 coro->cctx = cctx_new_run ();
1542 else if (!(coro->cctx->flags & CC_TRACE)) 1768 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack"); 1769 croak ("cannot enable tracing on coroutine with custom stack,");
1544 1770
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1771 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 } 1772 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1773 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 { 1774 {
… …
1553 else 1779 else
1554 coro->slot->runops = RUNOPS_DEFAULT; 1780 coro->slot->runops = RUNOPS_DEFAULT;
1555 } 1781 }
1556} 1782}
1557 1783
1784static void
1785coro_call_on_destroy (pTHX_ struct coro *coro)
1786{
1787 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1788 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1789
1790 if (on_destroyp)
1791 {
1792 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1793
1794 while (AvFILLp (on_destroy) >= 0)
1795 {
1796 dSP; /* don't disturb outer sp */
1797 SV *cb = av_pop (on_destroy);
1798
1799 PUSHMARK (SP);
1800
1801 if (statusp)
1802 {
1803 int i;
1804 AV *status = (AV *)SvRV (*statusp);
1805 EXTEND (SP, AvFILLp (status) + 1);
1806
1807 for (i = 0; i <= AvFILLp (status); ++i)
1808 PUSHs (AvARRAY (status)[i]);
1809 }
1810
1811 PUTBACK;
1812 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1813 }
1814 }
1815}
1816
1817static void
1818slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1819{
1820 int i;
1821 HV *hv = (HV *)SvRV (coro_current);
1822 AV *av = newAV ();
1823
1824 av_extend (av, items - 1);
1825 for (i = 0; i < items; ++i)
1826 av_push (av, SvREFCNT_inc_NN (arg [i]));
1827
1828 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1829
1830 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1831 api_ready (aTHX_ sv_manager);
1832
1833 frame->prepare = prepare_schedule;
1834 frame->check = slf_check_repeat;
1835}
1836
1837/*****************************************************************************/
1838/* async pool handler */
1839
1840static int
1841slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1842{
1843 HV *hv = (HV *)SvRV (coro_current);
1844 struct coro *coro = (struct coro *)frame->data;
1845
1846 if (!coro->invoke_cb)
1847 return 1; /* loop till we have invoke */
1848 else
1849 {
1850 hv_store (hv, "desc", sizeof ("desc") - 1,
1851 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1852
1853 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1854
1855 {
1856 dSP;
1857 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1858 PUTBACK;
1859 }
1860
1861 SvREFCNT_dec (GvAV (PL_defgv));
1862 GvAV (PL_defgv) = coro->invoke_av;
1863 coro->invoke_av = 0;
1864
1865 return 0;
1866 }
1867}
1868
1869static void
1870slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1871{
1872 HV *hv = (HV *)SvRV (coro_current);
1873 struct coro *coro = SvSTATE_hv ((SV *)hv);
1874
1875 if (expect_true (coro->saved_deffh))
1876 {
1877 /* subsequent iteration */
1878 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1879 coro->saved_deffh = 0;
1880
1881 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1882 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1883 {
1884 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1885 coro->invoke_av = newAV ();
1886
1887 frame->prepare = prepare_nop;
1888 }
1889 else
1890 {
1891 av_clear (GvAV (PL_defgv));
1892 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1893
1894 coro->prio = 0;
1895
1896 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1897 api_trace (aTHX_ coro_current, 0);
1898
1899 frame->prepare = prepare_schedule;
1900 av_push (av_async_pool, SvREFCNT_inc (hv));
1901 }
1902 }
1903 else
1904 {
1905 /* first iteration, simply fall through */
1906 frame->prepare = prepare_nop;
1907 }
1908
1909 frame->check = slf_check_pool_handler;
1910 frame->data = (void *)coro;
1911}
1912
1913/*****************************************************************************/
1914/* rouse callback */
1915
1916#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1917
1918static void
1919coro_rouse_callback (pTHX_ CV *cv)
1920{
1921 dXSARGS;
1922 SV *data = (SV *)GENSUB_ARG;
1923
1924 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1925 {
1926 /* first call, set args */
1927 AV *av = newAV ();
1928 SV *coro = SvRV (data);
1929
1930 SvRV_set (data, (SV *)av);
1931 api_ready (aTHX_ coro);
1932 SvREFCNT_dec (coro);
1933
1934 /* better take a full copy of the arguments */
1935 while (items--)
1936 av_store (av, items, newSVsv (ST (items)));
1937 }
1938
1939 XSRETURN_EMPTY;
1940}
1941
1942static int
1943slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1944{
1945 SV *data = (SV *)frame->data;
1946
1947 if (CORO_THROW)
1948 return 0;
1949
1950 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1951 return 1;
1952
1953 /* now push all results on the stack */
1954 {
1955 dSP;
1956 AV *av = (AV *)SvRV (data);
1957 int i;
1958
1959 EXTEND (SP, AvFILLp (av) + 1);
1960 for (i = 0; i <= AvFILLp (av); ++i)
1961 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1962
1963 /* we have stolen the elements, so ste length to zero and free */
1964 AvFILLp (av) = -1;
1965 av_undef (av);
1966
1967 PUTBACK;
1968 }
1969
1970 return 0;
1971}
1972
1973static void
1974slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1975{
1976 SV *cb;
1977
1978 if (items)
1979 cb = arg [0];
1980 else
1981 {
1982 struct coro *coro = SvSTATE_current;
1983
1984 if (!coro->rouse_cb)
1985 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1986
1987 cb = sv_2mortal (coro->rouse_cb);
1988 coro->rouse_cb = 0;
1989 }
1990
1991 if (!SvROK (cb)
1992 || SvTYPE (SvRV (cb)) != SVt_PVCV
1993 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1994 croak ("Coro::rouse_wait called with illegal callback argument,");
1995
1996 {
1997 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1998 SV *data = (SV *)GENSUB_ARG;
1999
2000 frame->data = (void *)data;
2001 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2002 frame->check = slf_check_rouse_wait;
2003 }
2004}
2005
2006static SV *
2007coro_new_rouse_cb (pTHX)
2008{
2009 HV *hv = (HV *)SvRV (coro_current);
2010 struct coro *coro = SvSTATE_hv (hv);
2011 SV *data = newRV_inc ((SV *)hv);
2012 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2013
2014 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2015 SvREFCNT_dec (data); /* magicext increases the refcount */
2016
2017 SvREFCNT_dec (coro->rouse_cb);
2018 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2019
2020 return cb;
2021}
2022
2023/*****************************************************************************/
2024/* schedule-like-function opcode (SLF) */
2025
2026static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2027static const CV *slf_cv;
2028static SV **slf_argv;
2029static int slf_argc, slf_arga; /* count, allocated */
2030static I32 slf_ax; /* top of stack, for restore */
2031
2032/* this restores the stack in the case we patched the entersub, to */
2033/* recreate the stack frame as perl will on following calls */
2034/* since entersub cleared the stack */
2035static OP *
2036pp_restore (pTHX)
2037{
2038 int i;
2039 SV **SP = PL_stack_base + slf_ax;
2040
2041 PUSHMARK (SP);
2042
2043 EXTEND (SP, slf_argc + 1);
2044
2045 for (i = 0; i < slf_argc; ++i)
2046 PUSHs (sv_2mortal (slf_argv [i]));
2047
2048 PUSHs ((SV *)CvGV (slf_cv));
2049
2050 RETURNOP (slf_restore.op_first);
2051}
2052
2053static void
2054slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2055{
2056 SV **arg = (SV **)slf_frame.data;
2057
2058 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2059}
2060
2061static void
2062slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2063{
2064 if (items != 2)
2065 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2066
2067 frame->prepare = slf_prepare_transfer;
2068 frame->check = slf_check_nop;
2069 frame->data = (void *)arg; /* let's hope it will stay valid */
2070}
2071
2072static void
2073slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2074{
2075 frame->prepare = prepare_schedule;
2076 frame->check = slf_check_nop;
2077}
2078
2079static void
2080slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2081{
2082 struct coro *next = (struct coro *)slf_frame.data;
2083
2084 SvREFCNT_inc_NN (next->hv);
2085 prepare_schedule_to (aTHX_ ta, next);
2086}
2087
2088static void
2089slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2090{
2091 if (!items)
2092 croak ("Coro::schedule_to expects a coroutine argument, caught");
2093
2094 frame->data = (void *)SvSTATE (arg [0]);
2095 frame->prepare = slf_prepare_schedule_to;
2096 frame->check = slf_check_nop;
2097}
2098
2099static void
2100slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2101{
2102 api_ready (aTHX_ SvRV (coro_current));
2103
2104 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2105}
2106
2107static void
2108slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2109{
2110 frame->prepare = prepare_cede;
2111 frame->check = slf_check_nop;
2112}
2113
2114static void
2115slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2116{
2117 frame->prepare = prepare_cede_notself;
2118 frame->check = slf_check_nop;
2119}
2120
2121/*
2122 * these not obviously related functions are all rolled into one
2123 * function to increase chances that they all will call transfer with the same
2124 * stack offset
2125 * SLF stands for "schedule-like-function".
2126 */
2127static OP *
2128pp_slf (pTHX)
2129{
2130 I32 checkmark; /* mark SP to see how many elements check has pushed */
2131
2132 /* set up the slf frame, unless it has already been set-up */
2133 /* the latter happens when a new coro has been started */
2134 /* or when a new cctx was attached to an existing coroutine */
2135 if (expect_true (!slf_frame.prepare))
2136 {
2137 /* first iteration */
2138 dSP;
2139 SV **arg = PL_stack_base + TOPMARK + 1;
2140 int items = SP - arg; /* args without function object */
2141 SV *gv = *sp;
2142
2143 /* do a quick consistency check on the "function" object, and if it isn't */
2144 /* for us, divert to the real entersub */
2145 if (SvTYPE (gv) != SVt_PVGV
2146 || !GvCV (gv)
2147 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2148 return PL_ppaddr[OP_ENTERSUB](aTHX);
2149
2150 if (!(PL_op->op_flags & OPf_STACKED))
2151 {
2152 /* ampersand-form of call, use @_ instead of stack */
2153 AV *av = GvAV (PL_defgv);
2154 arg = AvARRAY (av);
2155 items = AvFILLp (av) + 1;
2156 }
2157
2158 /* now call the init function, which needs to set up slf_frame */
2159 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2160 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2161
2162 /* pop args */
2163 SP = PL_stack_base + POPMARK;
2164
2165 PUTBACK;
2166 }
2167
2168 /* now that we have a slf_frame, interpret it! */
2169 /* we use a callback system not to make the code needlessly */
2170 /* complicated, but so we can run multiple perl coros from one cctx */
2171
2172 do
2173 {
2174 struct coro_transfer_args ta;
2175
2176 slf_frame.prepare (aTHX_ &ta);
2177 TRANSFER (ta, 0);
2178
2179 checkmark = PL_stack_sp - PL_stack_base;
2180 }
2181 while (slf_frame.check (aTHX_ &slf_frame));
2182
2183 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2184
2185 /* exception handling */
2186 if (expect_false (CORO_THROW))
2187 {
2188 SV *exception = sv_2mortal (CORO_THROW);
2189
2190 CORO_THROW = 0;
2191 sv_setsv (ERRSV, exception);
2192 croak (0);
2193 }
2194
2195 /* return value handling - mostly like entersub */
2196 /* make sure we put something on the stack in scalar context */
2197 if (GIMME_V == G_SCALAR)
2198 {
2199 dSP;
2200 SV **bot = PL_stack_base + checkmark;
2201
2202 if (sp == bot) /* too few, push undef */
2203 bot [1] = &PL_sv_undef;
2204 else if (sp != bot + 1) /* too many, take last one */
2205 bot [1] = *sp;
2206
2207 SP = bot + 1;
2208
2209 PUTBACK;
2210 }
2211
2212 return NORMAL;
2213}
2214
2215static void
2216api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2217{
2218 int i;
2219 SV **arg = PL_stack_base + ax;
2220 int items = PL_stack_sp - arg + 1;
2221
2222 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2223
2224 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2225 && PL_op->op_ppaddr != pp_slf)
2226 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2227
2228 CvFLAGS (cv) |= CVf_SLF;
2229 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2230 slf_cv = cv;
2231
2232 /* we patch the op, and then re-run the whole call */
2233 /* we have to put the same argument on the stack for this to work */
2234 /* and this will be done by pp_restore */
2235 slf_restore.op_next = (OP *)&slf_restore;
2236 slf_restore.op_type = OP_CUSTOM;
2237 slf_restore.op_ppaddr = pp_restore;
2238 slf_restore.op_first = PL_op;
2239
2240 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2241
2242 if (PL_op->op_flags & OPf_STACKED)
2243 {
2244 if (items > slf_arga)
2245 {
2246 slf_arga = items;
2247 free (slf_argv);
2248 slf_argv = malloc (slf_arga * sizeof (SV *));
2249 }
2250
2251 slf_argc = items;
2252
2253 for (i = 0; i < items; ++i)
2254 slf_argv [i] = SvREFCNT_inc (arg [i]);
2255 }
2256 else
2257 slf_argc = 0;
2258
2259 PL_op->op_ppaddr = pp_slf;
2260 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2261
2262 PL_op = (OP *)&slf_restore;
2263}
2264
2265/*****************************************************************************/
2266/* PerlIO::cede */
2267
2268typedef struct
2269{
2270 PerlIOBuf base;
2271 NV next, every;
2272} PerlIOCede;
2273
2274static IV
2275PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2276{
2277 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2278
2279 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2280 self->next = nvtime () + self->every;
2281
2282 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2283}
2284
2285static SV *
2286PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2287{
2288 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2289
2290 return newSVnv (self->every);
2291}
2292
2293static IV
2294PerlIOCede_flush (pTHX_ PerlIO *f)
2295{
2296 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2297 double now = nvtime ();
2298
2299 if (now >= self->next)
2300 {
2301 api_cede (aTHX);
2302 self->next = now + self->every;
2303 }
2304
2305 return PerlIOBuf_flush (aTHX_ f);
2306}
2307
2308static PerlIO_funcs PerlIO_cede =
2309{
2310 sizeof(PerlIO_funcs),
2311 "cede",
2312 sizeof(PerlIOCede),
2313 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2314 PerlIOCede_pushed,
2315 PerlIOBuf_popped,
2316 PerlIOBuf_open,
2317 PerlIOBase_binmode,
2318 PerlIOCede_getarg,
2319 PerlIOBase_fileno,
2320 PerlIOBuf_dup,
2321 PerlIOBuf_read,
2322 PerlIOBuf_unread,
2323 PerlIOBuf_write,
2324 PerlIOBuf_seek,
2325 PerlIOBuf_tell,
2326 PerlIOBuf_close,
2327 PerlIOCede_flush,
2328 PerlIOBuf_fill,
2329 PerlIOBase_eof,
2330 PerlIOBase_error,
2331 PerlIOBase_clearerr,
2332 PerlIOBase_setlinebuf,
2333 PerlIOBuf_get_base,
2334 PerlIOBuf_bufsiz,
2335 PerlIOBuf_get_ptr,
2336 PerlIOBuf_get_cnt,
2337 PerlIOBuf_set_ptrcnt,
2338};
2339
2340/*****************************************************************************/
2341/* Coro::Semaphore & Coro::Signal */
2342
2343static SV *
2344coro_waitarray_new (pTHX_ int count)
2345{
2346 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2347 AV *av = newAV ();
2348 SV **ary;
2349
2350 /* unfortunately, building manually saves memory */
2351 Newx (ary, 2, SV *);
2352 AvALLOC (av) = ary;
2353 /*AvARRAY (av) = ary;*/
2354 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2355 AvMAX (av) = 1;
2356 AvFILLp (av) = 0;
2357 ary [0] = newSViv (count);
2358
2359 return newRV_noinc ((SV *)av);
2360}
2361
2362/* semaphore */
2363
2364static void
2365coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2366{
2367 SV *count_sv = AvARRAY (av)[0];
2368 IV count = SvIVX (count_sv);
2369
2370 count += adjust;
2371 SvIVX (count_sv) = count;
2372
2373 /* now wake up as many waiters as are expected to lock */
2374 while (count > 0 && AvFILLp (av) > 0)
2375 {
2376 SV *cb;
2377
2378 /* swap first two elements so we can shift a waiter */
2379 AvARRAY (av)[0] = AvARRAY (av)[1];
2380 AvARRAY (av)[1] = count_sv;
2381 cb = av_shift (av);
2382
2383 if (SvOBJECT (cb))
2384 {
2385 api_ready (aTHX_ cb);
2386 --count;
2387 }
2388 else if (SvTYPE (cb) == SVt_PVCV)
2389 {
2390 dSP;
2391 PUSHMARK (SP);
2392 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2393 PUTBACK;
2394 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2395 }
2396
2397 SvREFCNT_dec (cb);
2398 }
2399}
2400
2401static void
2402coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2403{
2404 /* call $sem->adjust (0) to possibly wake up some other waiters */
2405 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2406}
2407
2408static int
2409slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2410{
2411 AV *av = (AV *)frame->data;
2412 SV *count_sv = AvARRAY (av)[0];
2413
2414 /* if we are about to throw, don't actually acquire the lock, just throw */
2415 if (CORO_THROW)
2416 return 0;
2417 else if (SvIVX (count_sv) > 0)
2418 {
2419 SvSTATE_current->on_destroy = 0;
2420
2421 if (acquire)
2422 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2423 else
2424 coro_semaphore_adjust (aTHX_ av, 0);
2425
2426 return 0;
2427 }
2428 else
2429 {
2430 int i;
2431 /* if we were woken up but can't down, we look through the whole */
2432 /* waiters list and only add us if we aren't in there already */
2433 /* this avoids some degenerate memory usage cases */
2434
2435 for (i = 1; i <= AvFILLp (av); ++i)
2436 if (AvARRAY (av)[i] == SvRV (coro_current))
2437 return 1;
2438
2439 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2440 return 1;
2441 }
2442}
2443
2444static int
2445slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2446{
2447 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2448}
2449
2450static int
2451slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2452{
2453 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2454}
2455
2456static void
2457slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2458{
2459 AV *av = (AV *)SvRV (arg [0]);
2460
2461 if (SvIVX (AvARRAY (av)[0]) > 0)
2462 {
2463 frame->data = (void *)av;
2464 frame->prepare = prepare_nop;
2465 }
2466 else
2467 {
2468 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2469
2470 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2471 frame->prepare = prepare_schedule;
2472
2473 /* to avoid race conditions when a woken-up coro gets terminated */
2474 /* we arrange for a temporary on_destroy that calls adjust (0) */
2475 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2476 }
2477}
2478
2479static void
2480slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2481{
2482 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2483 frame->check = slf_check_semaphore_down;
2484}
2485
2486static void
2487slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2488{
2489 if (items >= 2)
2490 {
2491 /* callback form */
2492 AV *av = (AV *)SvRV (arg [0]);
2493 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2494
2495 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2496
2497 if (SvIVX (AvARRAY (av)[0]) > 0)
2498 coro_semaphore_adjust (aTHX_ av, 0);
2499
2500 frame->prepare = prepare_nop;
2501 frame->check = slf_check_nop;
2502 }
2503 else
2504 {
2505 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2506 frame->check = slf_check_semaphore_wait;
2507 }
2508}
2509
2510/* signal */
2511
2512static void
2513coro_signal_wake (pTHX_ AV *av, int count)
2514{
2515 SvIVX (AvARRAY (av)[0]) = 0;
2516
2517 /* now signal count waiters */
2518 while (count > 0 && AvFILLp (av) > 0)
2519 {
2520 SV *cb;
2521
2522 /* swap first two elements so we can shift a waiter */
2523 cb = AvARRAY (av)[0];
2524 AvARRAY (av)[0] = AvARRAY (av)[1];
2525 AvARRAY (av)[1] = cb;
2526
2527 cb = av_shift (av);
2528
2529 api_ready (aTHX_ cb);
2530 sv_setiv (cb, 0); /* signal waiter */
2531 SvREFCNT_dec (cb);
2532
2533 --count;
2534 }
2535}
2536
2537static int
2538slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2539{
2540 /* if we are about to throw, also stop waiting */
2541 return SvROK ((SV *)frame->data) && !CORO_THROW;
2542}
2543
2544static void
2545slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 AV *av = (AV *)SvRV (arg [0]);
2548
2549 if (SvIVX (AvARRAY (av)[0]))
2550 {
2551 SvIVX (AvARRAY (av)[0]) = 0;
2552 frame->prepare = prepare_nop;
2553 frame->check = slf_check_nop;
2554 }
2555 else
2556 {
2557 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2558
2559 av_push (av, waiter);
2560
2561 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2562 frame->prepare = prepare_schedule;
2563 frame->check = slf_check_signal_wait;
2564 }
2565}
2566
2567/*****************************************************************************/
2568/* Coro::AIO */
2569
2570#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2571
2572/* helper storage struct */
2573struct io_state
2574{
2575 int errorno;
2576 I32 laststype; /* U16 in 5.10.0 */
2577 int laststatval;
2578 Stat_t statcache;
2579};
2580
2581static void
2582coro_aio_callback (pTHX_ CV *cv)
2583{
2584 dXSARGS;
2585 AV *state = (AV *)GENSUB_ARG;
2586 SV *coro = av_pop (state);
2587 SV *data_sv = newSV (sizeof (struct io_state));
2588
2589 av_extend (state, items - 1);
2590
2591 sv_upgrade (data_sv, SVt_PV);
2592 SvCUR_set (data_sv, sizeof (struct io_state));
2593 SvPOK_only (data_sv);
2594
2595 {
2596 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2597
2598 data->errorno = errno;
2599 data->laststype = PL_laststype;
2600 data->laststatval = PL_laststatval;
2601 data->statcache = PL_statcache;
2602 }
2603
2604 /* now build the result vector out of all the parameters and the data_sv */
2605 {
2606 int i;
2607
2608 for (i = 0; i < items; ++i)
2609 av_push (state, SvREFCNT_inc_NN (ST (i)));
2610 }
2611
2612 av_push (state, data_sv);
2613
2614 api_ready (aTHX_ coro);
2615 SvREFCNT_dec (coro);
2616 SvREFCNT_dec ((AV *)state);
2617}
2618
2619static int
2620slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2621{
2622 AV *state = (AV *)frame->data;
2623
2624 /* if we are about to throw, return early */
2625 /* this does not cancel the aio request, but at least */
2626 /* it quickly returns */
2627 if (CORO_THROW)
2628 return 0;
2629
2630 /* one element that is an RV? repeat! */
2631 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2632 return 1;
2633
2634 /* restore status */
2635 {
2636 SV *data_sv = av_pop (state);
2637 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2638
2639 errno = data->errorno;
2640 PL_laststype = data->laststype;
2641 PL_laststatval = data->laststatval;
2642 PL_statcache = data->statcache;
2643
2644 SvREFCNT_dec (data_sv);
2645 }
2646
2647 /* push result values */
2648 {
2649 dSP;
2650 int i;
2651
2652 EXTEND (SP, AvFILLp (state) + 1);
2653 for (i = 0; i <= AvFILLp (state); ++i)
2654 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2655
2656 PUTBACK;
2657 }
2658
2659 return 0;
2660}
2661
2662static void
2663slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2664{
2665 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2666 SV *coro_hv = SvRV (coro_current);
2667 struct coro *coro = SvSTATE_hv (coro_hv);
2668
2669 /* put our coroutine id on the state arg */
2670 av_push (state, SvREFCNT_inc_NN (coro_hv));
2671
2672 /* first see whether we have a non-zero priority and set it as AIO prio */
2673 if (coro->prio)
2674 {
2675 dSP;
2676
2677 static SV *prio_cv;
2678 static SV *prio_sv;
2679
2680 if (expect_false (!prio_cv))
2681 {
2682 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2683 prio_sv = newSViv (0);
2684 }
2685
2686 PUSHMARK (SP);
2687 sv_setiv (prio_sv, coro->prio);
2688 XPUSHs (prio_sv);
2689
2690 PUTBACK;
2691 call_sv (prio_cv, G_VOID | G_DISCARD);
2692 }
2693
2694 /* now call the original request */
2695 {
2696 dSP;
2697 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2698 int i;
2699
2700 PUSHMARK (SP);
2701
2702 /* first push all args to the stack */
2703 EXTEND (SP, items + 1);
2704
2705 for (i = 0; i < items; ++i)
2706 PUSHs (arg [i]);
2707
2708 /* now push the callback closure */
2709 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2710
2711 /* now call the AIO function - we assume our request is uncancelable */
2712 PUTBACK;
2713 call_sv ((SV *)req, G_VOID | G_DISCARD);
2714 }
2715
2716 /* now that the requets is going, we loop toll we have a result */
2717 frame->data = (void *)state;
2718 frame->prepare = prepare_schedule;
2719 frame->check = slf_check_aio_req;
2720}
2721
2722static void
2723coro_aio_req_xs (pTHX_ CV *cv)
2724{
2725 dXSARGS;
2726
2727 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2728
2729 XSRETURN_EMPTY;
2730}
2731
2732/*****************************************************************************/
2733
2734#if CORO_CLONE
2735# include "clone.c"
2736#endif
2737
1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2738MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559 2739
1560PROTOTYPES: DISABLE 2740PROTOTYPES: DISABLE
1561 2741
1562BOOT: 2742BOOT:
1563{ 2743{
1564#ifdef USE_ITHREADS 2744#ifdef USE_ITHREADS
1565 MUTEX_INIT (&coro_mutex); 2745# if CORO_PTHREAD
2746 coro_thx = PERL_GET_CONTEXT;
2747# endif
1566#endif 2748#endif
1567 BOOT_PAGESIZE; 2749 BOOT_PAGESIZE;
1568 2750
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2751 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2752 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571 2753
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2754 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1573 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2755 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1574 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2756 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1575 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576 2757
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2758 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2759 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2760 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580 2761
… …
1589 main_top_env = PL_top_env; 2770 main_top_env = PL_top_env;
1590 2771
1591 while (main_top_env->je_prev) 2772 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev; 2773 main_top_env = main_top_env->je_prev;
1593 2774
2775 {
2776 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2777
2778 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2779 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2780
2781 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2782 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2783 }
2784
1594 coroapi.ver = CORO_API_VERSION; 2785 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION; 2786 coroapi.rev = CORO_API_REVISION;
2787
1596 coroapi.transfer = api_transfer; 2788 coroapi.transfer = api_transfer;
2789
2790 coroapi.sv_state = SvSTATE_;
2791 coroapi.execute_slf = api_execute_slf;
2792 coroapi.prepare_nop = prepare_nop;
2793 coroapi.prepare_schedule = prepare_schedule;
2794 coroapi.prepare_cede = prepare_cede;
2795 coroapi.prepare_cede_notself = prepare_cede_notself;
2796
2797 {
2798 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2799
2800 if (!svp) croak ("Time::HiRes is required");
2801 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2802
2803 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2804 }
1597 2805
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2806 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599} 2807}
1600 2808
1601SV * 2809SV *
1602new (char *klass, ...) 2810new (char *klass, ...)
2811 ALIAS:
2812 Coro::new = 1
1603 CODE: 2813 CODE:
1604{ 2814{
1605 struct coro *coro; 2815 struct coro *coro;
1606 MAGIC *mg; 2816 MAGIC *mg;
1607 HV *hv; 2817 HV *hv;
2818 CV *cb;
1608 int i; 2819 int i;
2820
2821 if (items > 1)
2822 {
2823 cb = coro_sv_2cv (aTHX_ ST (1));
2824
2825 if (!ix)
2826 {
2827 if (CvISXSUB (cb))
2828 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2829
2830 if (!CvROOT (cb))
2831 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2832 }
2833 }
1609 2834
1610 Newz (0, coro, 1, struct coro); 2835 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV (); 2836 coro->args = newAV ();
1612 coro->flags = CF_NEW; 2837 coro->flags = CF_NEW;
1613 2838
… …
1618 coro->hv = hv = newHV (); 2843 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2844 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP; 2845 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2846 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622 2847
2848 if (items > 1)
2849 {
1623 av_extend (coro->args, items - 1); 2850 av_extend (coro->args, items - 1 + ix - 1);
2851
2852 if (ix)
2853 {
2854 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2855 cb = cv_coro_run;
2856 }
2857
2858 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2859
1624 for (i = 1; i < items; i++) 2860 for (i = 2; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i))); 2861 av_push (coro->args, newSVsv (ST (i)));
2862 }
1626} 2863}
1627 OUTPUT: 2864 OUTPUT:
1628 RETVAL 2865 RETVAL
1629 2866
1630# these not obviously related functions are all rolled into the same xs
1631# function to increase chances that they all will call transfer with the same
1632# stack offset
1633void 2867void
1634_set_stacklevel (...) 2868transfer (...)
1635 ALIAS: 2869 PROTOTYPE: $$
1636 Coro::State::transfer = 1 2870 CODE:
1637 Coro::schedule = 2 2871 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1638 Coro::cede = 3
1639 Coro::cede_notself = 4
1640 CODE:
1641{
1642 struct transfer_args ta;
1643
1644 PUTBACK;
1645 switch (ix)
1646 {
1647 case 0:
1648 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649 ta.next = 0;
1650 break;
1651
1652 case 1:
1653 if (items != 2)
1654 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657 break;
1658
1659 case 2:
1660 prepare_schedule (aTHX_ &ta);
1661 break;
1662
1663 case 3:
1664 prepare_cede (aTHX_ &ta);
1665 break;
1666
1667 case 4:
1668 if (!prepare_cede_notself (aTHX_ &ta))
1669 XSRETURN_EMPTY;
1670
1671 break;
1672 }
1673 SPAGAIN;
1674
1675 BARRIER;
1676 PUTBACK;
1677 TRANSFER (ta, 0);
1678 SPAGAIN; /* might be the sp of a different coroutine now */
1679 /* be extra careful not to ever do anything after TRANSFER */
1680}
1681 2872
1682bool 2873bool
1683_destroy (SV *coro_sv) 2874_destroy (SV *coro_sv)
1684 CODE: 2875 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2876 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT: 2877 OUTPUT:
1687 RETVAL 2878 RETVAL
1688 2879
1689void 2880void
1690_exit (code) 2881_exit (int code)
1691 int code
1692 PROTOTYPE: $ 2882 PROTOTYPE: $
1693 CODE: 2883 CODE:
1694 _exit (code); 2884 _exit (code);
1695 2885
2886#if CORO_CLONE
2887
2888SV *
2889clone (Coro::State coro)
2890 CODE:
2891{
2892 struct coro *ncoro = coro_clone (coro);
2893 MAGIC *mg;
2894 /* TODO: too much duplication */
2895 ncoro->hv = newHV ();
2896 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2897 mg->mg_flags |= MGf_DUP;
2898 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2899}
2900 OUTPUT:
2901 RETVAL
2902
2903#endif
2904
1696int 2905int
1697cctx_stacksize (int new_stacksize = 0) 2906cctx_stacksize (int new_stacksize = 0)
2907 PROTOTYPE: ;$
1698 CODE: 2908 CODE:
1699 RETVAL = coro_stacksize; 2909 RETVAL = cctx_stacksize;
1700 if (new_stacksize) 2910 if (new_stacksize)
2911 {
1701 coro_stacksize = new_stacksize; 2912 cctx_stacksize = new_stacksize;
2913 ++cctx_gen;
2914 }
1702 OUTPUT: 2915 OUTPUT:
1703 RETVAL 2916 RETVAL
1704 2917
1705int 2918int
2919cctx_max_idle (int max_idle = 0)
2920 PROTOTYPE: ;$
2921 CODE:
2922 RETVAL = cctx_max_idle;
2923 if (max_idle > 1)
2924 cctx_max_idle = max_idle;
2925 OUTPUT:
2926 RETVAL
2927
2928int
1706cctx_count () 2929cctx_count ()
2930 PROTOTYPE:
1707 CODE: 2931 CODE:
1708 RETVAL = cctx_count; 2932 RETVAL = cctx_count;
1709 OUTPUT: 2933 OUTPUT:
1710 RETVAL 2934 RETVAL
1711 2935
1712int 2936int
1713cctx_idle () 2937cctx_idle ()
2938 PROTOTYPE:
1714 CODE: 2939 CODE:
1715 RETVAL = cctx_idle; 2940 RETVAL = cctx_idle;
1716 OUTPUT: 2941 OUTPUT:
1717 RETVAL 2942 RETVAL
1718 2943
1719void 2944void
1720list () 2945list ()
2946 PROTOTYPE:
1721 PPCODE: 2947 PPCODE:
1722{ 2948{
1723 struct coro *coro; 2949 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next) 2950 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv) 2951 if (coro->hv)
… …
1730call (Coro::State coro, SV *coderef) 2956call (Coro::State coro, SV *coderef)
1731 ALIAS: 2957 ALIAS:
1732 eval = 1 2958 eval = 1
1733 CODE: 2959 CODE:
1734{ 2960{
1735 if (coro->mainstack) 2961 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736 { 2962 {
1737 struct coro temp; 2963 struct coro temp;
1738 2964
1739 if (!(coro->flags & CF_RUNNING)) 2965 if (!(coro->flags & CF_RUNNING))
1740 { 2966 {
… …
1784 RETVAL = boolSV (coro->flags & ix); 3010 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT: 3011 OUTPUT:
1786 RETVAL 3012 RETVAL
1787 3013
1788void 3014void
3015throw (Coro::State self, SV *throw = &PL_sv_undef)
3016 PROTOTYPE: $;$
3017 CODE:
3018{
3019 struct coro *current = SvSTATE_current;
3020 SV **throwp = self == current ? &CORO_THROW : &self->except;
3021 SvREFCNT_dec (*throwp);
3022 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3023}
3024
3025void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3026api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3027 PROTOTYPE: $;$
3028 C_ARGS: aTHX_ coro, flags
1790 3029
1791SV * 3030SV *
1792has_stack (Coro::State coro) 3031has_cctx (Coro::State coro)
1793 PROTOTYPE: $ 3032 PROTOTYPE: $
1794 CODE: 3033 CODE:
1795 RETVAL = boolSV (!!coro->cctx); 3034 RETVAL = boolSV (!!coro->cctx);
1796 OUTPUT: 3035 OUTPUT:
1797 RETVAL 3036 RETVAL
… …
1802 CODE: 3041 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3042 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT: 3043 OUTPUT:
1805 RETVAL 3044 RETVAL
1806 3045
1807IV 3046UV
1808rss (Coro::State coro) 3047rss (Coro::State coro)
1809 PROTOTYPE: $ 3048 PROTOTYPE: $
1810 ALIAS: 3049 ALIAS:
1811 usecount = 1 3050 usecount = 1
1812 CODE: 3051 CODE:
… …
1818 OUTPUT: 3057 OUTPUT:
1819 RETVAL 3058 RETVAL
1820 3059
1821void 3060void
1822force_cctx () 3061force_cctx ()
3062 PROTOTYPE:
1823 CODE: 3063 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0; 3064 SvSTATE_current->cctx->idle_sp = 0;
3065
3066void
3067swap_defsv (Coro::State self)
3068 PROTOTYPE: $
3069 ALIAS:
3070 swap_defav = 1
3071 CODE:
3072 if (!self->slot)
3073 croak ("cannot swap state with coroutine that has no saved state,");
3074 else
3075 {
3076 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3077 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3078
3079 SV *tmp = *src; *src = *dst; *dst = tmp;
3080 }
3081
1826 3082
1827MODULE = Coro::State PACKAGE = Coro 3083MODULE = Coro::State PACKAGE = Coro
1828 3084
1829BOOT: 3085BOOT:
1830{ 3086{
1831 int i; 3087 int i;
1832 3088
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3089 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3090 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3091 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3092 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3093 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3094 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3095 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3096 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
1836 3097
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3098 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1838 SvREADONLY_on (coro_current); 3099 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3100 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3101 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1839 3102
1840 coro_stash = gv_stashpv ("Coro", TRUE); 3103 coro_stash = gv_stashpv ("Coro", TRUE);
1841 3104
1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3105 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3106 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1848 3111
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3112 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV (); 3113 coro_ready[i] = newAV ();
1851 3114
1852 { 3115 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE); 3116 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855 3117
1856 coroapi.schedule = api_schedule; 3118 coroapi.schedule = api_schedule;
3119 coroapi.schedule_to = api_schedule_to;
1857 coroapi.cede = api_cede; 3120 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself; 3121 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready; 3122 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready; 3123 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready; 3124 coroapi.nready = coro_nready;
1862 coroapi.current = coro_current; 3125 coroapi.current = coro_current;
1863 3126
1864 GCoroAPI = &coroapi; 3127 /*GCoroAPI = &coroapi;*/
1865 sv_setiv (sv, (IV)&coroapi); 3128 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv); 3129 SvREADONLY_on (sv);
1867 } 3130 }
1868} 3131}
3132
3133void
3134terminate (...)
3135 CODE:
3136 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3137
3138void
3139schedule (...)
3140 CODE:
3141 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3142
3143void
3144schedule_to (...)
3145 CODE:
3146 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3147
3148void
3149cede_to (...)
3150 CODE:
3151 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3152
3153void
3154cede (...)
3155 CODE:
3156 CORO_EXECUTE_SLF_XS (slf_init_cede);
3157
3158void
3159cede_notself (...)
3160 CODE:
3161 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3162
3163void
3164_cancel (Coro::State self)
3165 CODE:
3166 coro_state_destroy (aTHX_ self);
3167 coro_call_on_destroy (aTHX_ self);
1869 3168
1870void 3169void
1871_set_current (SV *current) 3170_set_current (SV *current)
1872 PROTOTYPE: $ 3171 PROTOTYPE: $
1873 CODE: 3172 CODE:
1874 SvREFCNT_dec (SvRV (coro_current)); 3173 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3174 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3175
3176void
3177_set_readyhook (SV *hook)
3178 PROTOTYPE: $
3179 CODE:
3180 SvREFCNT_dec (coro_readyhook);
3181 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1876 3182
1877int 3183int
1878prio (Coro::State coro, int newprio = 0) 3184prio (Coro::State coro, int newprio = 0)
3185 PROTOTYPE: $;$
1879 ALIAS: 3186 ALIAS:
1880 nice = 1 3187 nice = 1
1881 CODE: 3188 CODE:
1882{ 3189{
1883 RETVAL = coro->prio; 3190 RETVAL = coro->prio;
… …
1898 3205
1899SV * 3206SV *
1900ready (SV *self) 3207ready (SV *self)
1901 PROTOTYPE: $ 3208 PROTOTYPE: $
1902 CODE: 3209 CODE:
1903 RETVAL = boolSV (api_ready (self)); 3210 RETVAL = boolSV (api_ready (aTHX_ self));
1904 OUTPUT: 3211 OUTPUT:
1905 RETVAL 3212 RETVAL
1906 3213
1907int 3214int
1908nready (...) 3215nready (...)
… …
1911 RETVAL = coro_nready; 3218 RETVAL = coro_nready;
1912 OUTPUT: 3219 OUTPUT:
1913 RETVAL 3220 RETVAL
1914 3221
1915void 3222void
1916throw (Coro::State self, SV *throw = &PL_sv_undef) 3223_pool_handler (...)
3224 CODE:
3225 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3226
3227void
3228async_pool (SV *cv, ...)
1917 PROTOTYPE: $;$ 3229 PROTOTYPE: &@
3230 PPCODE:
3231{
3232 HV *hv = (HV *)av_pop (av_async_pool);
3233 AV *av = newAV ();
3234 SV *cb = ST (0);
3235 int i;
3236
3237 av_extend (av, items - 2);
3238 for (i = 1; i < items; ++i)
3239 av_push (av, SvREFCNT_inc_NN (ST (i)));
3240
3241 if ((SV *)hv == &PL_sv_undef)
3242 {
3243 PUSHMARK (SP);
3244 EXTEND (SP, 2);
3245 PUSHs (sv_Coro);
3246 PUSHs ((SV *)cv_pool_handler);
3247 PUTBACK;
3248 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3249 SPAGAIN;
3250
3251 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3252 }
3253
3254 {
3255 struct coro *coro = SvSTATE_hv (hv);
3256
3257 assert (!coro->invoke_cb);
3258 assert (!coro->invoke_av);
3259 coro->invoke_cb = SvREFCNT_inc (cb);
3260 coro->invoke_av = av;
3261 }
3262
3263 api_ready (aTHX_ (SV *)hv);
3264
3265 if (GIMME_V != G_VOID)
3266 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3267 else
3268 SvREFCNT_dec (hv);
3269}
3270
3271SV *
3272rouse_cb ()
3273 PROTOTYPE:
3274 CODE:
3275 RETVAL = coro_new_rouse_cb (aTHX);
3276 OUTPUT:
3277 RETVAL
3278
3279void
3280rouse_wait (...)
3281 PROTOTYPE: ;$
3282 PPCODE:
3283 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3284
3285
3286MODULE = Coro::State PACKAGE = PerlIO::cede
3287
3288BOOT:
3289 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3290
3291
3292MODULE = Coro::State PACKAGE = Coro::Semaphore
3293
3294SV *
3295new (SV *klass, SV *count = 0)
3296 CODE:
3297 RETVAL = sv_bless (
3298 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3299 GvSTASH (CvGV (cv))
3300 );
3301 OUTPUT:
3302 RETVAL
3303
3304# helper for Coro::Channel
3305SV *
3306_alloc (int count)
3307 CODE:
3308 RETVAL = coro_waitarray_new (aTHX_ count);
3309 OUTPUT:
3310 RETVAL
3311
3312SV *
3313count (SV *self)
3314 CODE:
3315 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3316 OUTPUT:
3317 RETVAL
3318
3319void
3320up (SV *self, int adjust = 1)
3321 ALIAS:
3322 adjust = 1
1918 CODE: 3323 CODE:
1919 SvREFCNT_dec (self->throw); 3324 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921 3325
1922void 3326void
1923swap_defsv (Coro::State self) 3327down (...)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE: 3328 CODE:
1928 if (!self->slot) 3329 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1929 croak ("cannot swap state with coroutine that has no saved state"); 3330
3331void
3332wait (...)
3333 CODE:
3334 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3335
3336void
3337try (SV *self)
3338 PPCODE:
3339{
3340 AV *av = (AV *)SvRV (self);
3341 SV *count_sv = AvARRAY (av)[0];
3342 IV count = SvIVX (count_sv);
3343
3344 if (count > 0)
3345 {
3346 --count;
3347 SvIVX (count_sv) = count;
3348 XSRETURN_YES;
3349 }
3350 else
3351 XSRETURN_NO;
3352}
3353
3354void
3355waiters (SV *self)
3356 PPCODE:
3357{
3358 AV *av = (AV *)SvRV (self);
3359 int wcount = AvFILLp (av) + 1 - 1;
3360
3361 if (GIMME_V == G_SCALAR)
3362 XPUSHs (sv_2mortal (newSViv (wcount)));
1930 else 3363 else
1931 { 3364 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3365 int i;
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3366 EXTEND (SP, wcount);
1934 3367 for (i = 1; i <= wcount; ++i)
1935 SV *tmp = *src; *src = *dst; *dst = tmp; 3368 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1936 } 3369 }
3370}
1937 3371
1938# for async_pool speedup 3372MODULE = Coro::State PACKAGE = Coro::Signal
3373
3374SV *
3375new (SV *klass)
3376 CODE:
3377 RETVAL = sv_bless (
3378 coro_waitarray_new (aTHX_ 0),
3379 GvSTASH (CvGV (cv))
3380 );
3381 OUTPUT:
3382 RETVAL
3383
1939void 3384void
1940_pool_1 (SV *cb) 3385wait (...)
1941 CODE: 3386 CODE:
1942{ 3387 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
1943 struct coro *coro = SvSTATE (coro_current);
1944 HV *hv = (HV *)SvRV (coro_current);
1945 AV *defav = GvAV (PL_defgv);
1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1947 AV *invoke_av;
1948 int i, len;
1949
1950 if (!invoke)
1951 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1953 croak ("\3async_pool terminate\2\n");
1954 }
1955
1956 SvREFCNT_dec (coro->saved_deffh);
1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1958
1959 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961
1962 invoke_av = (AV *)SvRV (invoke);
1963 len = av_len (invoke_av);
1964
1965 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1966
1967 if (len > 0)
1968 {
1969 av_fill (defav, len - 1);
1970 for (i = 0; i < len; ++i)
1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1972 }
1973
1974 SvREFCNT_dec (invoke);
1975}
1976 3388
1977void 3389void
1978_pool_2 (SV *cb) 3390broadcast (SV *self)
3391 CODE:
3392{
3393 AV *av = (AV *)SvRV (self);
3394 coro_signal_wake (aTHX_ av, AvFILLp (av));
3395}
3396
3397void
3398send (SV *self)
3399 CODE:
3400{
3401 AV *av = (AV *)SvRV (self);
3402
3403 if (AvFILLp (av))
3404 coro_signal_wake (aTHX_ av, 1);
3405 else
3406 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3407}
3408
3409IV
3410awaited (SV *self)
1979 CODE: 3411 CODE:
1980{ 3412 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1981 struct coro *coro = SvSTATE (coro_current);
1982
1983 sv_setsv (cb, &PL_sv_undef);
1984
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0;
1987
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1992 croak ("\3async_pool terminate\2\n");
1993 }
1994
1995 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0);
2003
2004 av_push (av_async_pool, newSVsv (coro_current));
2005}
2006
2007
2008MODULE = Coro::State PACKAGE = Coro::AIO
2009
2010SV *
2011_get_state ()
2012 CODE:
2013{
2014 struct io_state *data;
2015
2016 RETVAL = newSV (sizeof (struct io_state));
2017 data = (struct io_state *)SvPVX (RETVAL);
2018 SvCUR_set (RETVAL, sizeof (struct io_state));
2019 SvPOK_only (RETVAL);
2020
2021 data->errorno = errno;
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025}
2026 OUTPUT: 3413 OUTPUT:
2027 RETVAL 3414 RETVAL
2028 3415
3416
3417MODULE = Coro::State PACKAGE = Coro::AnyEvent
3418
3419BOOT:
3420 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3421
2029void 3422void
2030_set_state (char *data_) 3423_schedule (...)
2031 PROTOTYPE: $
2032 CODE: 3424 CODE:
2033{ 3425{
2034 struct io_state *data = (void *)data_; 3426 static int incede;
2035 3427
2036 errno = data->errorno; 3428 api_cede_notself (aTHX);
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041 3429
3430 ++incede;
3431 while (coro_nready >= incede && api_cede (aTHX))
3432 ;
3433
3434 sv_setsv (sv_activity, &PL_sv_undef);
3435 if (coro_nready >= incede)
3436 {
3437 PUSHMARK (SP);
3438 PUTBACK;
3439 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3440 }
3441
3442 --incede;
3443}
3444
3445
3446MODULE = Coro::State PACKAGE = Coro::AIO
3447
3448void
3449_register (char *target, char *proto, SV *req)
3450 CODE:
3451{
3452 CV *req_cv = coro_sv_2cv (aTHX_ req);
3453 /* newXSproto doesn't return the CV on 5.8 */
3454 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3455 sv_setpv ((SV *)slf_cv, proto);
3456 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3457}
3458

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