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Comparing Coro/Coro/State.xs (file contents):
Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC vs.
Revision 1.322 by root, Sat Nov 22 05:13:34 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
… …
15 16
16#ifdef WIN32 17#ifdef WIN32
17# undef setjmp 18# undef setjmp
18# undef longjmp 19# undef longjmp
19# undef _exit 20# undef _exit
20#include <setjmp.h> 21# define setjmp _setjmp /* deep magic */
21#else 22#else
22# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
23#endif 24#endif
24 25
25#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
45# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
46#endif 47#endif
47 48
48#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 50# 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 51#endif
54 52
55/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
57 55
58#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
63 61
64#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr 63# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
67# endif 65# endif
… …
80# ifndef IS_PADCONST 78# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
82# endif 80# endif
83#endif 81#endif
84 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
85/* 5.8.8 */ 93/* 5.8.8 */
86#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
88#endif 96#endif
89#ifndef newSV 97#ifndef newSV
90# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
91#endif 99#endif
92 100#ifndef CvISXSUB_on
93/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
94#ifndef CxHASARGS 102#endif
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs 103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
96#endif 108#endif
97 109
98/* 5.8.7 */ 110/* 5.8.7 */
99#ifndef SvRV_set 111#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 126#endif
115 127
116/* The next macros try to return the current stack pointer, in an as 128/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */ 129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
118#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
120 137
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 139
123#if __GNUC__ >= 3 140#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
127#else 144#else
128# define attribute(x) 145# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 146# define expect(expr,value) (expr)
147# define INLINE static
131#endif 148#endif
132 149
133#define expect_false(expr) expect ((expr) != 0, 0) 150#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 151#define expect_true(expr) expect ((expr) != 0, 1)
135 152
136#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
137 154
138#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
139 157
140#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 159# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static 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 161# endif
162#endif
148 163
149/* helper storage struct for Coro::AIO */ 164static 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};
157 165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 174static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
164 180
165static GV *irsgv; /* $/ */ 181static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 182static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 183static SV *rv_diehook;
168static SV *rv_warnhook; 184static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 185static HV *hv_sig; /* %SIG */
170 186
171/* async_pool helper stuff */ 187/* async_pool helper stuff */
172static SV *sv_pool_rss; 188static SV *sv_pool_rss;
173static SV *sv_pool_size; 189static SV *sv_pool_size;
190static SV *sv_async_pool_idle; /* description string */
174static AV *av_async_pool; 191static AV *av_async_pool; /* idle pool */
192static SV *sv_Coro; /* class string */
193static CV *cv_pool_handler;
194static CV *cv_coro_state_new;
195
196/* Coro::AnyEvent */
197static SV *sv_activity;
175 198
176static struct coro_cctx *cctx_first; 199static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle; 200static int cctx_count, cctx_idle;
178 201
179enum { 202enum {
… …
184 CC_TRACE_LINE = 0x10, /* trace each statement */ 207 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 208 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186}; 209};
187 210
188/* this is a structure representing a c-level coroutine */ 211/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx { 212typedef struct coro_cctx
213{
190 struct coro_cctx *next; 214 struct coro_cctx *next;
191 215
192 /* the stack */ 216 /* the stack */
193 void *sptr; 217 void *sptr;
194 size_t ssize; 218 size_t ssize;
… …
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 221 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 */ 222 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env; 223 JMPENV *top_env;
200 coro_context cctx; 224 coro_context cctx;
201 225
226 U32 gen;
202#if CORO_USE_VALGRIND 227#if CORO_USE_VALGRIND
203 int valgrind_id; 228 int valgrind_id;
204#endif 229#endif
205 unsigned char flags; 230 unsigned char flags;
206} coro_cctx; 231} coro_cctx;
232
233coro_cctx *cctx_current; /* the currently running cctx */
234
235/*****************************************************************************/
207 236
208enum { 237enum {
209 CF_RUNNING = 0x0001, /* coroutine is running */ 238 CF_RUNNING = 0x0001, /* coroutine is running */
210 CF_READY = 0x0002, /* coroutine is ready */ 239 CF_READY = 0x0002, /* coroutine is ready */
211 CF_NEW = 0x0004, /* has never been switched to */ 240 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213}; 242};
214 243
215/* the structure where most of the perl state is stored, overlaid on the cxstack */ 244/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct { 245typedef struct
246{
217 SV *defsv; 247 SV *defsv;
218 AV *defav; 248 AV *defav;
219 SV *errsv; 249 SV *errsv;
220 SV *irsgv; 250 SV *irsgv;
221#define VAR(name,type) type name; 251#define VAR(name,type) type name;
… …
225 255
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 256#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227 257
228/* this is a structure representing a perl-level coroutine */ 258/* this is a structure representing a perl-level coroutine */
229struct coro { 259struct coro {
230 /* the c coroutine allocated to this perl coroutine, if any */ 260 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx; 261 coro_cctx *cctx;
232 262
233 /* process data */ 263 /* state data */
264 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack; 265 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */ 266 perl_slots *slot; /* basically the saved sp */
236 267
268 CV *startcv; /* the CV to execute */
237 AV *args; /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
238 int refcnt; /* coroutines are refcounted, yes */ 270 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */ 271 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */ 272 HV *hv; /* the perl hash associated with this coro, if any */
273 void (*on_destroy)(pTHX_ struct coro *coro);
241 274
242 /* statistics */ 275 /* statistics */
243 int usecount; /* number of transfers to this coro */ 276 int usecount; /* number of transfers to this coro */
244 277
245 /* coro process data */ 278 /* coro process data */
246 int prio; 279 int prio;
247 SV *throw; /* exception to be thrown */ 280 SV *except; /* exception to be thrown */
281 SV *rouse_cb;
248 282
249 /* async_pool */ 283 /* async_pool */
250 SV *saved_deffh; 284 SV *saved_deffh;
285 SV *invoke_cb;
286 AV *invoke_av;
251 287
252 /* linked list */ 288 /* linked list */
253 struct coro *next, *prev; 289 struct coro *next, *prev;
254}; 290};
255 291
256typedef struct coro *Coro__State; 292typedef struct coro *Coro__State;
257typedef struct coro *Coro__State_or_hashref; 293typedef struct coro *Coro__State_or_hashref;
294
295/* the following variables are effectively part of the perl context */
296/* and get copied between struct coro and these variables */
297/* the mainr easonw e don't support windows process emulation */
298static struct CoroSLF slf_frame; /* the current slf frame */
258 299
259/** Coro ********************************************************************/ 300/** Coro ********************************************************************/
260 301
261#define PRIO_MAX 3 302#define PRIO_MAX 3
262#define PRIO_HIGH 1 303#define PRIO_HIGH 1
… …
265#define PRIO_IDLE -3 306#define PRIO_IDLE -3
266#define PRIO_MIN -4 307#define PRIO_MIN -4
267 308
268/* for Coro.pm */ 309/* for Coro.pm */
269static SV *coro_current; 310static SV *coro_current;
311static SV *coro_readyhook;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 312static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
271static int coro_nready; 313static CV *cv_coro_run, *cv_coro_terminate;
272static struct coro *coro_first; 314static struct coro *coro_first;
315#define coro_nready coroapi.nready
273 316
274/** lowlevel stuff **********************************************************/ 317/** lowlevel stuff **********************************************************/
275 318
276static SV * 319static SV *
277coro_get_sv (pTHX_ const char *name, int create) 320coro_get_sv (pTHX_ const char *name, int create)
… …
301 get_hv (name, create); 344 get_hv (name, create);
302#endif 345#endif
303 return get_hv (name, create); 346 return get_hv (name, create);
304} 347}
305 348
349/* may croak */
350INLINE CV *
351coro_sv_2cv (pTHX_ SV *sv)
352{
353 HV *st;
354 GV *gvp;
355 return sv_2cv (sv, &st, &gvp, 0);
356}
357
306static AV * 358static AV *
307coro_clone_padlist (pTHX_ CV *cv) 359coro_derive_padlist (pTHX_ CV *cv)
308{ 360{
309 AV *padlist = CvPADLIST (cv); 361 AV *padlist = CvPADLIST (cv);
310 AV *newpadlist, *newpad; 362 AV *newpadlist, *newpad;
311 363
312 newpadlist = newAV (); 364 newpadlist = newAV ();
… …
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif 370#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 371 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist); 372 --AvFILLp (padlist);
321 373
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 374 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
323 av_store (newpadlist, 1, (SV *)newpad); 375 av_store (newpadlist, 1, (SV *)newpad);
324 376
325 return newpadlist; 377 return newpadlist;
326} 378}
327 379
… …
357 409
358 /* casting is fun. */ 410 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 411 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist); 412 free_padlist (aTHX_ padlist);
361 413
414 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
415
362 return 0; 416 return 0;
363} 417}
364 418
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext 419#define CORO_MAGIC_type_cv 26
366#define CORO_MAGIC_type_state PERL_MAGIC_ext 420#define CORO_MAGIC_type_state PERL_MAGIC_ext
367 421
368static MGVTBL coro_cv_vtbl = { 422static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0, 423 0, 0, 0, 0,
370 coro_cv_free 424 coro_cv_free
371}; 425};
372 426
427#define CORO_MAGIC_NN(sv, type) \
428 (expect_true (SvMAGIC (sv)->mg_type == type) \
429 ? SvMAGIC (sv) \
430 : mg_find (sv, type))
431
373#define CORO_MAGIC(sv,type) \ 432#define CORO_MAGIC(sv, type) \
374 SvMAGIC (sv) \ 433 (expect_true (SvMAGIC (sv)) \
375 ? SvMAGIC (sv)->mg_type == type \ 434 ? CORO_MAGIC_NN (sv, type) \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0 435 : 0)
379 436
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 437#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) 438#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
382 439
383static struct coro * 440INLINE struct coro *
384SvSTATE_ (pTHX_ SV *coro) 441SvSTATE_ (pTHX_ SV *coro)
385{ 442{
386 HV *stash; 443 HV *stash;
387 MAGIC *mg; 444 MAGIC *mg;
388 445
… …
403 mg = CORO_MAGIC_state (coro); 460 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr; 461 return (struct coro *)mg->mg_ptr;
405} 462}
406 463
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 464#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
465
466/* faster than SvSTATE, but expects a coroutine hv */
467#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
468#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408 469
409/* the next two functions merely cache the padlists */ 470/* the next two functions merely cache the padlists */
410static void 471static void
411get_padlist (pTHX_ CV *cv) 472get_padlist (pTHX_ CV *cv)
412{ 473{
… …
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 477 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 478 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else 479 else
419 { 480 {
420#if CORO_PREFER_PERL_FUNCTIONS 481#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */ 482 /* this is probably cleaner? but also slower! */
483 /* in practise, it seems to be less stable */
422 CV *cp = Perl_cv_clone (cv); 484 CV *cp = Perl_cv_clone (aTHX_ cv);
423 CvPADLIST (cv) = CvPADLIST (cp); 485 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0; 486 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp); 487 SvREFCNT_dec (cp);
426#else 488#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 489 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
428#endif 490#endif
429 } 491 }
430} 492}
431 493
432static void 494static void
… …
478 CvPADLIST (cv) = (AV *)POPs; 540 CvPADLIST (cv) = (AV *)POPs;
479 } 541 }
480 542
481 PUTBACK; 543 PUTBACK;
482 } 544 }
545
546 slf_frame = c->slf_frame;
547 CORO_THROW = c->except;
483} 548}
484 549
485static void 550static void
486save_perl (pTHX_ Coro__State c) 551save_perl (pTHX_ Coro__State c)
487{ 552{
553 c->except = CORO_THROW;
554 c->slf_frame = slf_frame;
555
488 { 556 {
489 dSP; 557 dSP;
490 I32 cxix = cxstack_ix; 558 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack; 559 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo; 560 PERL_SI *top_si = PL_curstackinfo;
… …
510 578
511 if (expect_true (CvDEPTH (cv))) 579 if (expect_true (CvDEPTH (cv)))
512 { 580 {
513 EXTEND (SP, 3); 581 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv)); 582 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 583 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516 PUSHs ((SV *)cv); 584 PUSHs ((SV *)cv);
517 585
518 CvDEPTH (cv) = 0; 586 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv); 587 get_padlist (aTHX_ cv);
520 } 588 }
… …
559 #undef VAR 627 #undef VAR
560 } 628 }
561} 629}
562 630
563/* 631/*
564 * allocate various perl stacks. This is an exact copy 632 * allocate various perl stacks. This is almost an exact copy
565 * of perl.c:init_stacks, except that it uses less memory 633 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do 634 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace. 635 * not usually need a lot of stackspace.
568 */ 636 */
569#if CORO_PREFER_PERL_FUNCTIONS 637#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks 638# define coro_init_stacks(thx) init_stacks ()
571#else 639#else
572static void 640static void
573coro_init_stacks (pTHX) 641coro_init_stacks (pTHX)
574{ 642{
575 PL_curstackinfo = new_stackinfo(32, 8); 643 PL_curstackinfo = new_stackinfo(32, 8);
… …
612 680
613/* 681/*
614 * destroy the stacks, the callchain etc... 682 * destroy the stacks, the callchain etc...
615 */ 683 */
616static void 684static void
617coro_destroy_stacks (pTHX) 685coro_destruct_stacks (pTHX)
618{ 686{
619 while (PL_curstackinfo->si_next) 687 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next; 688 PL_curstackinfo = PL_curstackinfo->si_next;
621 689
622 while (PL_curstackinfo) 690 while (PL_curstackinfo)
… …
638#if !PERL_VERSION_ATLEAST (5,10,0) 706#if !PERL_VERSION_ATLEAST (5,10,0)
639 Safefree (PL_retstack); 707 Safefree (PL_retstack);
640#endif 708#endif
641} 709}
642 710
711#define CORO_RSS \
712 rss += sizeof (SYM (curstackinfo)); \
713 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
714 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
715 rss += SYM (tmps_max) * sizeof (SV *); \
716 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
717 rss += SYM (scopestack_max) * sizeof (I32); \
718 rss += SYM (savestack_max) * sizeof (ANY);
719
643static size_t 720static size_t
644coro_rss (pTHX_ struct coro *coro) 721coro_rss (pTHX_ struct coro *coro)
645{ 722{
646 size_t rss = sizeof (*coro); 723 size_t rss = sizeof (*coro);
647 724
648 if (coro->mainstack) 725 if (coro->mainstack)
649 { 726 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING) 727 if (coro->flags & CF_RUNNING)
654 { 728 {
655 slot = &tmp_slot; 729 #define SYM(sym) PL_ ## sym
656 730 CORO_RSS;
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR 731 #undef SYM
660 } 732 }
661 else 733 else
662 slot = coro->slot; 734 {
663 735 #define SYM(sym) coro->slot->sym
664 rss += sizeof (slot->curstackinfo); 736 CORO_RSS;
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 737 #undef SYM
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 738 }
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 } 739 }
676 740
677 return rss; 741 return rss;
678} 742}
679 743
680/** coroutine stack handling ************************************************/ 744/** coroutine stack handling ************************************************/
681 745
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 746static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 747static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
748static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
749
750/* apparently < 5.8.8 */
751#ifndef MgPV_nolen_const
752#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
753 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
754 (const char*)(mg)->mg_ptr)
755#endif
684 756
685/* 757/*
686 * This overrides the default magic get method of %SIG elements. 758 * 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 759 * 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 760 * and instead of tryign to save and restore the hash elements, we just provide
… …
696{ 768{
697 const char *s = MgPV_nolen_const (mg); 769 const char *s = MgPV_nolen_const (mg);
698 770
699 if (*s == '_') 771 if (*s == '_')
700 { 772 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 773 SV **svp = 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
781 return 0;
782 }
703 } 783 }
704 784
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 785 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = 0;
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
706} 810}
707 811
708static int 812static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 813coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710{ 814{
… …
728 832
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 833 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730} 834}
731 835
732static void 836static void
837prepare_nop (pTHX_ struct coro_transfer_args *ta)
838{
839 /* kind of mega-hacky, but works */
840 ta->next = ta->prev = (struct coro *)ta;
841}
842
843static int
844slf_check_nop (pTHX_ struct CoroSLF *frame)
845{
846 return 0;
847}
848
849static int
850slf_check_repeat (pTHX_ struct CoroSLF *frame)
851{
852 return 1;
853}
854
855static UNOP coro_setup_op;
856
857static void NOINLINE /* noinline to keep it out of the transfer fast path */
733coro_setup (pTHX_ struct coro *coro) 858coro_setup (pTHX_ struct coro *coro)
734{ 859{
735 /* 860 /*
736 * emulate part of the perl startup here. 861 * emulate part of the perl startup here.
737 */ 862 */
… …
757 GvSV (PL_defgv) = newSV (0); 882 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0; 883 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0); 884 GvSV (PL_errgv) = newSV (0);
760 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 885 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
761 PL_rs = newSVsv (GvSV (irsgv)); 886 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 887 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763 888
764 { 889 {
765 dSP; 890 dSP;
766 LOGOP myop; 891 UNOP myop;
767 892
768 Zero (&myop, 1, LOGOP); 893 Zero (&myop, 1, UNOP);
769 myop.op_next = Nullop; 894 myop.op_next = Nullop;
895 myop.op_type = OP_ENTERSUB;
770 myop.op_flags = OPf_WANT_VOID; 896 myop.op_flags = OPf_WANT_VOID;
771 897
772 PUSHMARK (SP); 898 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 899 PUSHs ((SV *)coro->startcv);
774 PUTBACK; 900 PUTBACK;
775 PL_op = (OP *)&myop; 901 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 902 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN;
778 } 903 }
779 904
780 /* this newly created coroutine might be run on an existing cctx which most 905 /* this newly created coroutine might be run on an existing cctx which most
781 * likely was suspended in set_stacklevel, called from entersub. 906 * 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 */ 907 */
785 ENTER; 908 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
786} 909 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
787 910
911 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
912 coro_setup_op.op_next = PL_op;
913 coro_setup_op.op_type = OP_ENTERSUB;
914 coro_setup_op.op_ppaddr = pp_slf;
915 /* no flags etc. required, as an init function won't be called */
916
917 PL_op = (OP *)&coro_setup_op;
918
919 /* copy throw, in case it was set before coro_setup */
920 CORO_THROW = coro->except;
921}
922
788static void 923static void
789coro_destroy (pTHX_ struct coro *coro) 924coro_destruct (pTHX_ struct coro *coro)
790{ 925{
791 if (!IN_DESTRUCT) 926 if (!IN_DESTRUCT)
792 { 927 {
793 /* restore all saved variables and stuff */ 928 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0); 929 LEAVE_SCOPE (0);
… …
814 949
815 SvREFCNT_dec (PL_diehook); 950 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook); 951 SvREFCNT_dec (PL_warnhook);
817 952
818 SvREFCNT_dec (coro->saved_deffh); 953 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw); 954 SvREFCNT_dec (coro->rouse_cb);
955 SvREFCNT_dec (coro->invoke_cb);
956 SvREFCNT_dec (coro->invoke_av);
820 957
821 coro_destroy_stacks (aTHX); 958 coro_destruct_stacks (aTHX);
822} 959}
823 960
824static void 961INLINE void
825free_coro_mortal (pTHX) 962free_coro_mortal (pTHX)
826{ 963{
827 if (expect_true (coro_mortal)) 964 if (expect_true (coro_mortal))
828 { 965 {
829 SvREFCNT_dec (coro_mortal); 966 SvREFCNT_dec (coro_mortal);
… …
834static int 971static int
835runops_trace (pTHX) 972runops_trace (pTHX)
836{ 973{
837 COP *oldcop = 0; 974 COP *oldcop = 0;
838 int oldcxix = -2; 975 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 976 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx; 977 coro_cctx *cctx = coro->cctx;
841 978
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 979 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 { 980 {
844 PERL_ASYNC_CHECK (); 981 PERL_ASYNC_CHECK ();
… …
863 : cx->blk_gimme == G_SCALAR ? bot + 1 1000 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot; 1001 : bot;
865 1002
866 av_extend (av, top - bot); 1003 av_extend (av, top - bot);
867 while (bot < top) 1004 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++)); 1005 av_push (av, SvREFCNT_inc_NN (*bot++));
869 1006
870 PL_runops = RUNOPS_DEFAULT; 1007 PL_runops = RUNOPS_DEFAULT;
871 ENTER; 1008 ENTER;
872 SAVETMPS; 1009 SAVETMPS;
873 EXTEND (SP, 3); 1010 EXTEND (SP, 3);
… …
896 { 1033 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1034 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 1035
899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1036 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
900 { 1037 {
901 runops_proc_t old_runops = PL_runops;
902 dSP; 1038 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv); 1039 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0)); 1040 SV *fullname = sv_2mortal (newSV (0));
905 1041
906 if (isGV (gv)) 1042 if (isGV (gv))
… …
911 SAVETMPS; 1047 SAVETMPS;
912 EXTEND (SP, 3); 1048 EXTEND (SP, 3);
913 PUSHMARK (SP); 1049 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes); 1050 PUSHs (&PL_sv_yes);
915 PUSHs (fullname); 1051 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1052 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK; 1053 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1054 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); 1055 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN; 1056 SPAGAIN;
921 FREETMPS; 1057 FREETMPS;
… …
953 1089
954 TAINT_NOT; 1090 TAINT_NOT;
955 return 0; 1091 return 0;
956} 1092}
957 1093
958/* inject a fake call to Coro::State::_cctx_init into the execution */ 1094static struct CoroSLF cctx_ssl_frame;
959/* _cctx_init should be careful, as it could be called at almost any time */ 1095
960/* during execution of a perl program */ 1096static void
1097slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1098{
1099 ta->prev = 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)
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_current->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_frame = slf_frame;
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1126
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1127 slf_frame.prepare = slf_prepare_set_stacklevel;
980 PUTBACK; 1128 slf_frame.check = slf_check_set_stacklevel;
981 PL_op = (OP *)&myop; 1129}
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1130
983 SPAGAIN; 1131/* the tail of transfer: execute stuff we can only do after a transfer */
1132INLINE void
1133transfer_tail (pTHX)
1134{
1135 free_coro_mortal (aTHX);
984} 1136}
985 1137
986/* 1138/*
987 * this is a _very_ stripped down perl interpreter ;) 1139 * this is a _very_ stripped down perl interpreter ;)
988 */ 1140 */
989static void 1141static void
990cctx_run (void *arg) 1142cctx_run (void *arg)
991{ 1143{
1144#ifdef USE_ITHREADS
1145# if CORO_PTHREAD
1146 PERL_SET_CONTEXT (coro_thx);
1147# endif
1148#endif
1149 {
992 dTHX; 1150 dTHX;
993 1151
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1152 /* normally we would need to skip the entersub here */
995 UNLOCK; 1153 /* 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; 1154 /* PL_nop = PL_nop->op_next */
999 1155
1000 /* inject a fake subroutine call to cctx_init */ 1156 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg); 1157 cctx_prepare (aTHX);
1002 1158
1159 /* cctx_run is the alternative tail of transfer() */
1160 transfer_tail (aTHX);
1161
1003 /* somebody or something will hit me for both perl_run and PL_restartop */ 1162 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op; 1163 PL_restartop = PL_op;
1005 perl_run (PL_curinterp); 1164 perl_run (PL_curinterp);
1006
1007 /* 1165 /*
1166 * Unfortunately, there is no way to get at the return values of the
1167 * coro body here, as perl_run destroys these
1168 */
1169
1170 /*
1008 * If perl-run returns we assume exit() was being called or the coro 1171 * 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) 1172 * 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 1173 * 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" 1174 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept 1175 * coroutine as Coro has no such concept
1013 */ 1176 */
1014 PL_top_env = main_top_env; 1177 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1178 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1179 }
1016} 1180}
1017 1181
1018static coro_cctx * 1182static coro_cctx *
1019cctx_new () 1183cctx_new ()
1020{ 1184{
1021 coro_cctx *cctx; 1185 coro_cctx *cctx;
1186
1187 ++cctx_count;
1188 New (0, cctx, 1, coro_cctx);
1189
1190 cctx->gen = cctx_gen;
1191 cctx->flags = 0;
1192 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx only suitable as source */
1198static coro_cctx *
1199cctx_new_empty ()
1200{
1201 coro_cctx *cctx = cctx_new ();
1202
1203 cctx->sptr = 0;
1204 coro_create (&cctx->cctx, 0, 0, 0, 0);
1205
1206 return cctx;
1207}
1208
1209/* create a new cctx suitable as destination/running a perl interpreter */
1210static coro_cctx *
1211cctx_new_run ()
1212{
1213 coro_cctx *cctx = cctx_new ();
1022 void *stack_start; 1214 void *stack_start;
1023 size_t stack_size; 1215 size_t stack_size;
1024 1216
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP 1217#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1218 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */ 1219 /* 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); 1220 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033 1221
1034 if (cctx->sptr != (void *)-1) 1222 if (cctx->sptr != (void *)-1)
1035 { 1223 {
1036# if CORO_STACKGUARD 1224 #if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1225 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif 1226 #endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1227 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1228 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED; 1229 cctx->flags |= CC_MAPPED;
1042 } 1230 }
1043 else 1231 else
1044#endif 1232#endif
1045 { 1233 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long); 1234 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long); 1235 New (0, cctx->sptr, cctx_stacksize, long);
1048 1236
1049 if (!cctx->sptr) 1237 if (!cctx->sptr)
1050 { 1238 {
1051 perror ("FATAL: unable to allocate stack for coroutine"); 1239 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052 _exit (EXIT_FAILURE); 1240 _exit (EXIT_FAILURE);
1053 } 1241 }
1054 1242
1055 stack_start = cctx->sptr; 1243 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize; 1244 stack_size = cctx->ssize;
1057 } 1245 }
1058 1246
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1247 #if CORO_USE_VALGRIND
1248 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1249 #endif
1250
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1251 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061 1252
1062 return cctx; 1253 return cctx;
1063} 1254}
1064 1255
… …
1066cctx_destroy (coro_cctx *cctx) 1257cctx_destroy (coro_cctx *cctx)
1067{ 1258{
1068 if (!cctx) 1259 if (!cctx)
1069 return; 1260 return;
1070 1261
1262 assert (cctx != cctx_current);//D temporary
1263
1071 --cctx_count; 1264 --cctx_count;
1265 coro_destroy (&cctx->cctx);
1072 1266
1267 /* coro_transfer creates new, empty cctx's */
1268 if (cctx->sptr)
1269 {
1073#if CORO_USE_VALGRIND 1270 #if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1271 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif 1272 #endif
1076 1273
1077#if HAVE_MMAP 1274#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED) 1275 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize); 1276 munmap (cctx->sptr, cctx->ssize);
1080 else 1277 else
1081#endif 1278#endif
1082 Safefree (cctx->sptr); 1279 Safefree (cctx->sptr);
1280 }
1083 1281
1084 Safefree (cctx); 1282 Safefree (cctx);
1085} 1283}
1086 1284
1087/* wether this cctx should be destructed */ 1285/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1286#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1089 1287
1090static coro_cctx * 1288static coro_cctx *
1091cctx_get (pTHX) 1289cctx_get (pTHX)
1092{ 1290{
1093 while (expect_true (cctx_first)) 1291 while (expect_true (cctx_first))
… …
1100 return cctx; 1298 return cctx;
1101 1299
1102 cctx_destroy (cctx); 1300 cctx_destroy (cctx);
1103 } 1301 }
1104 1302
1105 return cctx_new (); 1303 return cctx_new_run ();
1106} 1304}
1107 1305
1108static void 1306static void
1109cctx_put (coro_cctx *cctx) 1307cctx_put (coro_cctx *cctx)
1110{ 1308{
1309 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1310
1111 /* free another cctx if overlimit */ 1311 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1312 if (expect_false (cctx_idle >= cctx_max_idle))
1113 { 1313 {
1114 coro_cctx *first = cctx_first; 1314 coro_cctx *first = cctx_first;
1115 cctx_first = first->next; 1315 cctx_first = first->next;
1116 --cctx_idle; 1316 --cctx_idle;
1117 1317
… …
1126/** coroutine switching *****************************************************/ 1326/** coroutine switching *****************************************************/
1127 1327
1128static void 1328static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next) 1329transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{ 1330{
1331 /* TODO: throwing up here is considered harmful */
1332
1131 if (expect_true (prev != next)) 1333 if (expect_true (prev != next))
1132 { 1334 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1335 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"); 1336 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1135 1337
1136 if (expect_false (next->flags & CF_RUNNING)) 1338 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"); 1339 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1138 1340
1139 if (expect_false (next->flags & CF_DESTROYED)) 1341 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"); 1342 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1141 1343
1142#if !PERL_VERSION_ATLEAST (5,10,0) 1344#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1345 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"); 1346 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1145#endif 1347#endif
1146 } 1348 }
1147} 1349}
1148 1350
1149/* always use the TRANSFER macro */ 1351/* always use the TRANSFER macro */
1150static void NOINLINE 1352static void NOINLINE /* noinline so we have a fixed stackframe */
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1353transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{ 1354{
1153 dSTACKLEVEL; 1355 dSTACKLEVEL;
1154 static volatile int has_throw;
1155 1356
1156 /* sometimes transfer is only called to set idle_sp */ 1357 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next)) 1358 if (expect_false (!prev))
1158 { 1359 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1360 cctx_current->idle_sp = STACKLEVEL;
1160 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1361 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1161 } 1362 }
1162 else if (expect_true (prev != next)) 1363 else if (expect_true (prev != next))
1163 { 1364 {
1164 coro_cctx *prev__cctx; 1365 coro_cctx *cctx_prev;
1165 1366
1166 if (expect_false (prev->flags & CF_NEW)) 1367 if (expect_false (prev->flags & CF_NEW))
1167 { 1368 {
1168 /* create a new empty context */ 1369 /* create a new empty/source context */
1169 Newz (0, prev->cctx, 1, coro_cctx);
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))
… …
1187 coro_setup (aTHX_ next); 1385 coro_setup (aTHX_ next);
1188 } 1386 }
1189 else 1387 else
1190 load_perl (aTHX_ next); 1388 load_perl (aTHX_ next);
1191 1389
1192 prev__cctx = prev->cctx;
1193
1194 /* possibly "free" the cctx */ 1390 /* possibly untie and reuse the cctx */
1195 if (expect_true ( 1391 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL 1392 cctx_current->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE) 1393 && !(cctx_current->flags & CC_TRACE)
1198 && !force_cctx 1394 && !force_cctx
1199 )) 1395 ))
1200 { 1396 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1397 /* 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)); 1398 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1203
1204 prev->cctx = 0;
1205 1399
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1400 /* 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 */ 1401 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1208 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1402 if (expect_false (CCTX_EXPIRED (cctx_current)))
1209 if (!next->cctx) 1403 if (!next->cctx)
1210 next->cctx = cctx_get (aTHX); 1404 next->cctx = cctx_get (aTHX);
1211 1405
1212 cctx_put (prev__cctx); 1406 cctx_put (cctx_current);
1407 assert (!prev->cctx);//D temporary
1213 } 1408 }
1409 else
1410 prev->cctx = cctx_current;
1214 1411
1215 ++next->usecount; 1412 ++next->usecount;
1216 1413
1217 if (expect_true (!next->cctx)) 1414 cctx_prev = cctx_current;
1218 next->cctx = cctx_get (aTHX); 1415 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1219 1416
1220 has_throw = !!next->throw; 1417 next->cctx = 0;
1221 1418
1222 if (expect_false (prev__cctx != next->cctx)) 1419 if (expect_false (cctx_prev != cctx_current))
1223 { 1420 {
1224 prev__cctx->top_env = PL_top_env; 1421 cctx_prev->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env; 1422 PL_top_env = cctx_current->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1423 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1227 } 1424 }
1228 1425
1229 free_coro_mortal (aTHX); 1426 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 } 1427 }
1245} 1428}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251 1429
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1430#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) 1431#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254 1432
1255/** high level stuff ********************************************************/ 1433/** high level stuff ********************************************************/
… …
1257static int 1435static int
1258coro_state_destroy (pTHX_ struct coro *coro) 1436coro_state_destroy (pTHX_ struct coro *coro)
1259{ 1437{
1260 if (coro->flags & CF_DESTROYED) 1438 if (coro->flags & CF_DESTROYED)
1261 return 0; 1439 return 0;
1440
1441 if (coro->on_destroy)
1442 coro->on_destroy (aTHX_ coro);
1262 1443
1263 coro->flags |= CF_DESTROYED; 1444 coro->flags |= CF_DESTROYED;
1264 1445
1265 if (coro->flags & CF_READY) 1446 if (coro->flags & CF_READY)
1266 { 1447 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1448 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */ 1449 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready; 1450 --coro_nready;
1271 UNLOCK;
1272 } 1451 }
1273 else 1452 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1453 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275 1454
1276 if (coro->mainstack && coro->mainstack != main_mainstack) 1455 if (coro->mainstack && coro->mainstack != main_mainstack)
1277 { 1456 {
1278 struct coro temp; 1457 struct coro temp;
1279 1458
1280 if (coro->flags & CF_RUNNING) 1459 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282 1460
1283 save_perl (aTHX_ &temp); 1461 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro); 1462 load_perl (aTHX_ coro);
1285 1463
1286 coro_destroy (aTHX_ coro); 1464 coro_destruct (aTHX_ coro);
1287 1465
1288 load_perl (aTHX_ &temp); 1466 load_perl (aTHX_ &temp);
1289 1467
1290 coro->slot = 0; 1468 coro->slot = 0;
1291 } 1469 }
1292 1470
1293 cctx_destroy (coro->cctx); 1471 cctx_destroy (coro->cctx);
1472 SvREFCNT_dec (coro->startcv);
1294 SvREFCNT_dec (coro->args); 1473 SvREFCNT_dec (coro->args);
1474 SvREFCNT_dec (CORO_THROW);
1295 1475
1296 if (coro->next) coro->next->prev = coro->prev; 1476 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next; 1477 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next; 1478 if (coro == coro_first) coro_first = coro->next;
1299 1479
… …
1337# define MGf_DUP 0 1517# define MGf_DUP 0
1338#endif 1518#endif
1339}; 1519};
1340 1520
1341static void 1521static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1522prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{ 1523{
1344 ta->prev = SvSTATE (prev_sv); 1524 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv); 1525 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta); 1526 TRANSFER_CHECK (*ta);
1347} 1527}
1348 1528
1349static void 1529static void
1350api_transfer (SV *prev_sv, SV *next_sv) 1530api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351{ 1531{
1352 dTHX;
1353 struct transfer_args ta; 1532 struct coro_transfer_args ta;
1354 1533
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1534 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1); 1535 TRANSFER (ta, 1);
1357} 1536}
1358 1537
1538/*****************************************************************************/
1539/* gensub: simple closure generation utility */
1540
1541#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1542
1543/* create a closure from XS, returns a code reference */
1544/* the arg can be accessed via GENSUB_ARG from the callback */
1545/* the callback must use dXSARGS/XSRETURN */
1546static SV *
1547gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1548{
1549 CV *cv = (CV *)newSV (0);
1550
1551 sv_upgrade ((SV *)cv, SVt_PVCV);
1552
1553 CvANON_on (cv);
1554 CvISXSUB_on (cv);
1555 CvXSUB (cv) = xsub;
1556 GENSUB_ARG = arg;
1557
1558 return newRV_noinc ((SV *)cv);
1559}
1560
1359/** Coro ********************************************************************/ 1561/** Coro ********************************************************************/
1360 1562
1361static void 1563INLINE void
1362coro_enq (pTHX_ SV *coro_sv) 1564coro_enq (pTHX_ struct coro *coro)
1363{ 1565{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1566 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1365} 1567}
1366 1568
1367static SV * 1569INLINE SV *
1368coro_deq (pTHX) 1570coro_deq (pTHX)
1369{ 1571{
1370 int prio; 1572 int prio;
1371 1573
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1574 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1375 1577
1376 return 0; 1578 return 0;
1377} 1579}
1378 1580
1379static int 1581static int
1380api_ready (SV *coro_sv) 1582api_ready (pTHX_ SV *coro_sv)
1381{ 1583{
1382 dTHX;
1383 struct coro *coro; 1584 struct coro *coro;
1585 SV *sv_hook;
1586 void (*xs_hook)(void);
1384 1587
1385 if (SvROK (coro_sv)) 1588 if (SvROK (coro_sv))
1386 coro_sv = SvRV (coro_sv); 1589 coro_sv = SvRV (coro_sv);
1387 1590
1388 coro = SvSTATE (coro_sv); 1591 coro = SvSTATE (coro_sv);
… …
1390 if (coro->flags & CF_READY) 1593 if (coro->flags & CF_READY)
1391 return 0; 1594 return 0;
1392 1595
1393 coro->flags |= CF_READY; 1596 coro->flags |= CF_READY;
1394 1597
1395 LOCK; 1598 sv_hook = coro_nready ? 0 : coro_readyhook;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1599 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1600
1601 coro_enq (aTHX_ coro);
1397 ++coro_nready; 1602 ++coro_nready;
1398 UNLOCK; 1603
1604 if (sv_hook)
1605 {
1606 dSP;
1607
1608 ENTER;
1609 SAVETMPS;
1610
1611 PUSHMARK (SP);
1612 PUTBACK;
1613 call_sv (sv_hook, G_VOID | G_DISCARD);
1614
1615 FREETMPS;
1616 LEAVE;
1617 }
1618
1619 if (xs_hook)
1620 xs_hook ();
1399 1621
1400 return 1; 1622 return 1;
1401} 1623}
1402 1624
1403static int 1625static int
1404api_is_ready (SV *coro_sv) 1626api_is_ready (pTHX_ SV *coro_sv)
1405{ 1627{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1628 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408} 1629}
1409 1630
1631/* expects to own a reference to next->hv */
1632INLINE void
1633prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1634{
1635 SV *prev_sv = SvRV (coro_current);
1636
1637 ta->prev = SvSTATE_hv (prev_sv);
1638 ta->next = next;
1639
1640 TRANSFER_CHECK (*ta);
1641
1642 SvRV_set (coro_current, (SV *)next->hv);
1643
1644 free_coro_mortal (aTHX);
1645 coro_mortal = prev_sv;
1646}
1647
1410static void 1648static void
1411prepare_schedule (pTHX_ struct transfer_args *ta) 1649prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1412{ 1650{
1413 SV *prev_sv, *next_sv;
1414
1415 for (;;) 1651 for (;;)
1416 { 1652 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX); 1653 SV *next_sv = coro_deq (aTHX);
1419 1654
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv)) 1655 if (expect_true (next_sv))
1422 { 1656 {
1657 struct coro *next = SvSTATE_hv (next_sv);
1658
1659 /* cannot transfer to destroyed coros, skip and look for next */
1660 if (expect_false (next->flags & CF_DESTROYED))
1661 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1662 else
1663 {
1664 next->flags &= ~CF_READY;
1665 --coro_nready;
1666
1667 prepare_schedule_to (aTHX_ ta, next);
1668 break;
1669 }
1670 }
1671 else
1672 {
1673 /* nothing to schedule: call the idle handler */
1423 dSP; 1674 dSP;
1424 UNLOCK;
1425 1675
1426 ENTER; 1676 ENTER;
1427 SAVETMPS; 1677 SAVETMPS;
1428 1678
1429 PUSHMARK (SP); 1679 PUSHMARK (SP);
1430 PUTBACK; 1680 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1681 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1432 SPAGAIN;
1433 1682
1434 FREETMPS; 1683 FREETMPS;
1435 LEAVE; 1684 LEAVE;
1436 continue;
1437 } 1685 }
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 } 1686 }
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} 1687}
1468 1688
1469static void 1689INLINE void
1470prepare_cede (pTHX_ struct transfer_args *ta) 1690prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471{ 1691{
1472 api_ready (coro_current); 1692 api_ready (aTHX_ coro_current);
1473 prepare_schedule (aTHX_ ta); 1693 prepare_schedule (aTHX_ ta);
1474} 1694}
1475 1695
1696INLINE void
1697prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1698{
1699 SV *prev = SvRV (coro_current);
1700
1701 if (coro_nready)
1702 {
1703 prepare_schedule (aTHX_ ta);
1704 api_ready (aTHX_ prev);
1705 }
1706 else
1707 prepare_nop (aTHX_ ta);
1708}
1709
1710static void
1711api_schedule (pTHX)
1712{
1713 struct coro_transfer_args ta;
1714
1715 prepare_schedule (aTHX_ &ta);
1716 TRANSFER (ta, 1);
1717}
1718
1719static void
1720api_schedule_to (pTHX_ SV *coro_sv)
1721{
1722 struct coro_transfer_args ta;
1723 struct coro *next = SvSTATE (coro_sv);
1724
1725 SvREFCNT_inc_NN (coro_sv);
1726 prepare_schedule_to (aTHX_ &ta, next);
1727}
1728
1476static int 1729static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta) 1730api_cede (pTHX)
1478{ 1731{
1479 if (coro_nready) 1732 struct coro_transfer_args ta;
1480 { 1733
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta); 1734 prepare_cede (aTHX_ &ta);
1483 api_ready (prev); 1735
1736 if (expect_true (ta.prev != ta.next))
1737 {
1738 TRANSFER (ta, 1);
1484 return 1; 1739 return 1;
1485 } 1740 }
1486 else 1741 else
1487 return 0; 1742 return 0;
1488} 1743}
1489 1744
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 1745static int
1501api_cede (void) 1746api_cede_notself (pTHX)
1502{ 1747{
1503 dTHX; 1748 if (coro_nready)
1749 {
1504 struct transfer_args ta; 1750 struct coro_transfer_args ta;
1505 1751
1506 prepare_cede (aTHX_ &ta); 1752 prepare_cede_notself (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1); 1753 TRANSFER (ta, 1);
1511 return 1; 1754 return 1;
1512 } 1755 }
1513 else 1756 else
1514 return 0; 1757 return 0;
1515} 1758}
1516 1759
1517static int 1760static 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) 1761api_trace (pTHX_ SV *coro_sv, int flags)
1534{ 1762{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv); 1763 struct coro *coro = SvSTATE (coro_sv);
1537 1764
1538 if (flags & CC_TRACE) 1765 if (flags & CC_TRACE)
1539 { 1766 {
1540 if (!coro->cctx) 1767 if (!coro->cctx)
1541 coro->cctx = cctx_new (); 1768 coro->cctx = cctx_new_run ();
1542 else if (!(coro->cctx->flags & CC_TRACE)) 1769 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack"); 1770 croak ("cannot enable tracing on coroutine with custom stack,");
1544 1771
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1772 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 } 1773 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1774 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 { 1775 {
… …
1553 else 1780 else
1554 coro->slot->runops = RUNOPS_DEFAULT; 1781 coro->slot->runops = RUNOPS_DEFAULT;
1555 } 1782 }
1556} 1783}
1557 1784
1785static void
1786coro_call_on_destroy (pTHX_ struct coro *coro)
1787{
1788 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1789 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1790
1791 if (on_destroyp)
1792 {
1793 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1794
1795 while (AvFILLp (on_destroy) >= 0)
1796 {
1797 dSP; /* don't disturb outer sp */
1798 SV *cb = av_pop (on_destroy);
1799
1800 PUSHMARK (SP);
1801
1802 if (statusp)
1803 {
1804 int i;
1805 AV *status = (AV *)SvRV (*statusp);
1806 EXTEND (SP, AvFILLp (status) + 1);
1807
1808 for (i = 0; i <= AvFILLp (status); ++i)
1809 PUSHs (AvARRAY (status)[i]);
1810 }
1811
1812 PUTBACK;
1813 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1814 }
1815 }
1816}
1817
1818static void
1819slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1820{
1821 int i;
1822 HV *hv = (HV *)SvRV (coro_current);
1823 AV *av = newAV ();
1824
1825 av_extend (av, items - 1);
1826 for (i = 0; i < items; ++i)
1827 av_push (av, SvREFCNT_inc_NN (arg [i]));
1828
1829 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1830
1831 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1832 api_ready (aTHX_ sv_manager);
1833
1834 frame->prepare = prepare_schedule;
1835 frame->check = slf_check_repeat;
1836}
1837
1838/*****************************************************************************/
1839/* async pool handler */
1840
1841static int
1842slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1843{
1844 HV *hv = (HV *)SvRV (coro_current);
1845 struct coro *coro = (struct coro *)frame->data;
1846
1847 if (!coro->invoke_cb)
1848 return 1; /* loop till we have invoke */
1849 else
1850 {
1851 hv_store (hv, "desc", sizeof ("desc") - 1,
1852 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1853
1854 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1855
1856 {
1857 dSP;
1858 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1859 PUTBACK;
1860 }
1861
1862 SvREFCNT_dec (GvAV (PL_defgv));
1863 GvAV (PL_defgv) = coro->invoke_av;
1864 coro->invoke_av = 0;
1865
1866 return 0;
1867 }
1868}
1869
1870static void
1871slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1872{
1873 HV *hv = (HV *)SvRV (coro_current);
1874 struct coro *coro = SvSTATE_hv ((SV *)hv);
1875
1876 if (expect_true (coro->saved_deffh))
1877 {
1878 /* subsequent iteration */
1879 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1880 coro->saved_deffh = 0;
1881
1882 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1883 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1884 {
1885 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1886 coro->invoke_av = newAV ();
1887
1888 frame->prepare = prepare_nop;
1889 }
1890 else
1891 {
1892 av_clear (GvAV (PL_defgv));
1893 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1894
1895 coro->prio = 0;
1896
1897 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1898 api_trace (aTHX_ coro_current, 0);
1899
1900 frame->prepare = prepare_schedule;
1901 av_push (av_async_pool, SvREFCNT_inc (hv));
1902 }
1903 }
1904 else
1905 {
1906 /* first iteration, simply fall through */
1907 frame->prepare = prepare_nop;
1908 }
1909
1910 frame->check = slf_check_pool_handler;
1911 frame->data = (void *)coro;
1912}
1913
1914/*****************************************************************************/
1915/* rouse callback */
1916
1917#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1918
1919static void
1920coro_rouse_callback (pTHX_ CV *cv)
1921{
1922 dXSARGS;
1923 SV *data = (SV *)GENSUB_ARG;
1924
1925 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1926 {
1927 /* first call, set args */
1928 AV *av = newAV ();
1929 SV *coro = SvRV (data);
1930
1931 SvRV_set (data, (SV *)av);
1932 api_ready (aTHX_ coro);
1933 SvREFCNT_dec (coro);
1934
1935 /* better take a full copy of the arguments */
1936 while (items--)
1937 av_store (av, items, newSVsv (ST (items)));
1938 }
1939
1940 XSRETURN_EMPTY;
1941}
1942
1943static int
1944slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1945{
1946 SV *data = (SV *)frame->data;
1947
1948 if (CORO_THROW)
1949 return 0;
1950
1951 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1952 return 1;
1953
1954 /* now push all results on the stack */
1955 {
1956 dSP;
1957 AV *av = (AV *)SvRV (data);
1958 int i;
1959
1960 EXTEND (SP, AvFILLp (av) + 1);
1961 for (i = 0; i <= AvFILLp (av); ++i)
1962 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1963
1964 /* we have stolen the elements, so ste length to zero and free */
1965 AvFILLp (av) = -1;
1966 av_undef (av);
1967
1968 PUTBACK;
1969 }
1970
1971 return 0;
1972}
1973
1974static void
1975slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1976{
1977 SV *cb;
1978
1979 if (items)
1980 cb = arg [0];
1981 else
1982 {
1983 struct coro *coro = SvSTATE_current;
1984
1985 if (!coro->rouse_cb)
1986 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1987
1988 cb = sv_2mortal (coro->rouse_cb);
1989 coro->rouse_cb = 0;
1990 }
1991
1992 if (!SvROK (cb)
1993 || SvTYPE (SvRV (cb)) != SVt_PVCV
1994 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1995 croak ("Coro::rouse_wait called with illegal callback argument,");
1996
1997 {
1998 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1999 SV *data = (SV *)GENSUB_ARG;
2000
2001 frame->data = (void *)data;
2002 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2003 frame->check = slf_check_rouse_wait;
2004 }
2005}
2006
2007static SV *
2008coro_new_rouse_cb (pTHX)
2009{
2010 HV *hv = (HV *)SvRV (coro_current);
2011 struct coro *coro = SvSTATE_hv (hv);
2012 SV *data = newRV_inc ((SV *)hv);
2013 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2014
2015 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2016 SvREFCNT_dec (data); /* magicext increases the refcount */
2017
2018 SvREFCNT_dec (coro->rouse_cb);
2019 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2020
2021 return cb;
2022}
2023
2024/*****************************************************************************/
2025/* schedule-like-function opcode (SLF) */
2026
2027static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2028static const CV *slf_cv;
2029static SV **slf_argv;
2030static int slf_argc, slf_arga; /* count, allocated */
2031static I32 slf_ax; /* top of stack, for restore */
2032
2033/* this restores the stack in the case we patched the entersub, to */
2034/* recreate the stack frame as perl will on following calls */
2035/* since entersub cleared the stack */
2036static OP *
2037pp_restore (pTHX)
2038{
2039 int i;
2040 SV **SP = PL_stack_base + slf_ax;
2041
2042 PUSHMARK (SP);
2043
2044 EXTEND (SP, slf_argc + 1);
2045
2046 for (i = 0; i < slf_argc; ++i)
2047 PUSHs (sv_2mortal (slf_argv [i]));
2048
2049 PUSHs ((SV *)CvGV (slf_cv));
2050
2051 RETURNOP (slf_restore.op_first);
2052}
2053
2054static void
2055slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2056{
2057 SV **arg = (SV **)slf_frame.data;
2058
2059 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2060}
2061
2062static void
2063slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 if (items != 2)
2066 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2067
2068 frame->prepare = slf_prepare_transfer;
2069 frame->check = slf_check_nop;
2070 frame->data = (void *)arg; /* let's hope it will stay valid */
2071}
2072
2073static void
2074slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2075{
2076 frame->prepare = prepare_schedule;
2077 frame->check = slf_check_nop;
2078}
2079
2080static void
2081slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2082{
2083 struct coro *next = (struct coro *)slf_frame.data;
2084
2085 SvREFCNT_inc_NN (next->hv);
2086 prepare_schedule_to (aTHX_ ta, next);
2087}
2088
2089static void
2090slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2091{
2092 if (!items)
2093 croak ("Coro::schedule_to expects a coroutine argument, caught");
2094
2095 frame->data = (void *)SvSTATE (arg [0]);
2096 frame->prepare = slf_prepare_schedule_to;
2097 frame->check = slf_check_nop;
2098}
2099
2100static void
2101slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2102{
2103 api_ready (aTHX_ SvRV (coro_current));
2104
2105 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2106}
2107
2108static void
2109slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2110{
2111 frame->prepare = prepare_cede;
2112 frame->check = slf_check_nop;
2113}
2114
2115static void
2116slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2117{
2118 frame->prepare = prepare_cede_notself;
2119 frame->check = slf_check_nop;
2120}
2121
2122/*
2123 * these not obviously related functions are all rolled into one
2124 * function to increase chances that they all will call transfer with the same
2125 * stack offset
2126 * SLF stands for "schedule-like-function".
2127 */
2128static OP *
2129pp_slf (pTHX)
2130{
2131 I32 checkmark; /* mark SP to see how many elements check has pushed */
2132
2133 /* set up the slf frame, unless it has already been set-up */
2134 /* the latter happens when a new coro has been started */
2135 /* or when a new cctx was attached to an existing coroutine */
2136 if (expect_true (!slf_frame.prepare))
2137 {
2138 /* first iteration */
2139 dSP;
2140 SV **arg = PL_stack_base + TOPMARK + 1;
2141 int items = SP - arg; /* args without function object */
2142 SV *gv = *sp;
2143
2144 /* do a quick consistency check on the "function" object, and if it isn't */
2145 /* for us, divert to the real entersub */
2146 if (SvTYPE (gv) != SVt_PVGV
2147 || !GvCV (gv)
2148 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2149 return PL_ppaddr[OP_ENTERSUB](aTHX);
2150
2151 if (!(PL_op->op_flags & OPf_STACKED))
2152 {
2153 /* ampersand-form of call, use @_ instead of stack */
2154 AV *av = GvAV (PL_defgv);
2155 arg = AvARRAY (av);
2156 items = AvFILLp (av) + 1;
2157 }
2158
2159 /* now call the init function, which needs to set up slf_frame */
2160 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2161 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2162
2163 /* pop args */
2164 SP = PL_stack_base + POPMARK;
2165
2166 PUTBACK;
2167 }
2168
2169 /* now that we have a slf_frame, interpret it! */
2170 /* we use a callback system not to make the code needlessly */
2171 /* complicated, but so we can run multiple perl coros from one cctx */
2172
2173 do
2174 {
2175 struct coro_transfer_args ta;
2176
2177 slf_frame.prepare (aTHX_ &ta);
2178 TRANSFER (ta, 0);
2179
2180 checkmark = PL_stack_sp - PL_stack_base;
2181 }
2182 while (slf_frame.check (aTHX_ &slf_frame));
2183
2184 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2185
2186 /* exception handling */
2187 if (expect_false (CORO_THROW))
2188 {
2189 SV *exception = sv_2mortal (CORO_THROW);
2190
2191 CORO_THROW = 0;
2192 sv_setsv (ERRSV, exception);
2193 croak (0);
2194 }
2195
2196 /* return value handling - mostly like entersub */
2197 /* make sure we put something on the stack in scalar context */
2198 if (GIMME_V == G_SCALAR)
2199 {
2200 dSP;
2201 SV **bot = PL_stack_base + checkmark;
2202
2203 if (sp == bot) /* too few, push undef */
2204 bot [1] = &PL_sv_undef;
2205 else if (sp != bot + 1) /* too many, take last one */
2206 bot [1] = *sp;
2207
2208 SP = bot + 1;
2209
2210 PUTBACK;
2211 }
2212
2213 return NORMAL;
2214}
2215
2216static void
2217api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2218{
2219 int i;
2220 SV **arg = PL_stack_base + ax;
2221 int items = PL_stack_sp - arg + 1;
2222
2223 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2224
2225 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2226 && PL_op->op_ppaddr != pp_slf)
2227 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2228
2229 CvFLAGS (cv) |= CVf_SLF;
2230 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2231 slf_cv = cv;
2232
2233 /* we patch the op, and then re-run the whole call */
2234 /* we have to put the same argument on the stack for this to work */
2235 /* and this will be done by pp_restore */
2236 slf_restore.op_next = (OP *)&slf_restore;
2237 slf_restore.op_type = OP_CUSTOM;
2238 slf_restore.op_ppaddr = pp_restore;
2239 slf_restore.op_first = PL_op;
2240
2241 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2242
2243 if (PL_op->op_flags & OPf_STACKED)
2244 {
2245 if (items > slf_arga)
2246 {
2247 slf_arga = items;
2248 free (slf_argv);
2249 slf_argv = malloc (slf_arga * sizeof (SV *));
2250 }
2251
2252 slf_argc = items;
2253
2254 for (i = 0; i < items; ++i)
2255 slf_argv [i] = SvREFCNT_inc (arg [i]);
2256 }
2257 else
2258 slf_argc = 0;
2259
2260 PL_op->op_ppaddr = pp_slf;
2261 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2262
2263 PL_op = (OP *)&slf_restore;
2264}
2265
2266/*****************************************************************************/
2267/* PerlIO::cede */
2268
2269typedef struct
2270{
2271 PerlIOBuf base;
2272 NV next, every;
2273} PerlIOCede;
2274
2275static IV
2276PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2277{
2278 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2279
2280 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2281 self->next = nvtime () + self->every;
2282
2283 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2284}
2285
2286static SV *
2287PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2288{
2289 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2290
2291 return newSVnv (self->every);
2292}
2293
2294static IV
2295PerlIOCede_flush (pTHX_ PerlIO *f)
2296{
2297 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2298 double now = nvtime ();
2299
2300 if (now >= self->next)
2301 {
2302 api_cede (aTHX);
2303 self->next = now + self->every;
2304 }
2305
2306 return PerlIOBuf_flush (aTHX_ f);
2307}
2308
2309static PerlIO_funcs PerlIO_cede =
2310{
2311 sizeof(PerlIO_funcs),
2312 "cede",
2313 sizeof(PerlIOCede),
2314 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2315 PerlIOCede_pushed,
2316 PerlIOBuf_popped,
2317 PerlIOBuf_open,
2318 PerlIOBase_binmode,
2319 PerlIOCede_getarg,
2320 PerlIOBase_fileno,
2321 PerlIOBuf_dup,
2322 PerlIOBuf_read,
2323 PerlIOBuf_unread,
2324 PerlIOBuf_write,
2325 PerlIOBuf_seek,
2326 PerlIOBuf_tell,
2327 PerlIOBuf_close,
2328 PerlIOCede_flush,
2329 PerlIOBuf_fill,
2330 PerlIOBase_eof,
2331 PerlIOBase_error,
2332 PerlIOBase_clearerr,
2333 PerlIOBase_setlinebuf,
2334 PerlIOBuf_get_base,
2335 PerlIOBuf_bufsiz,
2336 PerlIOBuf_get_ptr,
2337 PerlIOBuf_get_cnt,
2338 PerlIOBuf_set_ptrcnt,
2339};
2340
2341/*****************************************************************************/
2342/* Coro::Semaphore & Coro::Signal */
2343
2344static SV *
2345coro_waitarray_new (pTHX_ int count)
2346{
2347 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2348 AV *av = newAV ();
2349 SV **ary;
2350
2351 /* unfortunately, building manually saves memory */
2352 Newx (ary, 2, SV *);
2353 AvALLOC (av) = ary;
2354 /*AvARRAY (av) = ary;*/
2355 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2356 AvMAX (av) = 1;
2357 AvFILLp (av) = 0;
2358 ary [0] = newSViv (count);
2359
2360 return newRV_noinc ((SV *)av);
2361}
2362
2363/* semaphore */
2364
2365static void
2366coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2367{
2368 SV *count_sv = AvARRAY (av)[0];
2369 IV count = SvIVX (count_sv);
2370
2371 count += adjust;
2372 SvIVX (count_sv) = count;
2373
2374 /* now wake up as many waiters as are expected to lock */
2375 while (count > 0 && AvFILLp (av) > 0)
2376 {
2377 SV *cb;
2378
2379 /* swap first two elements so we can shift a waiter */
2380 AvARRAY (av)[0] = AvARRAY (av)[1];
2381 AvARRAY (av)[1] = count_sv;
2382 cb = av_shift (av);
2383
2384 if (SvOBJECT (cb))
2385 {
2386 api_ready (aTHX_ cb);
2387 --count;
2388 }
2389 else if (SvTYPE (cb) == SVt_PVCV)
2390 {
2391 dSP;
2392 PUSHMARK (SP);
2393 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2394 PUTBACK;
2395 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2396 }
2397
2398 SvREFCNT_dec (cb);
2399 }
2400}
2401
2402static void
2403coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2404{
2405 /* call $sem->adjust (0) to possibly wake up some other waiters */
2406 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2407}
2408
2409static int
2410slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2411{
2412 AV *av = (AV *)frame->data;
2413 SV *count_sv = AvARRAY (av)[0];
2414
2415 /* if we are about to throw, don't actually acquire the lock, just throw */
2416 if (CORO_THROW)
2417 return 0;
2418 else if (SvIVX (count_sv) > 0)
2419 {
2420 SvSTATE_current->on_destroy = 0;
2421
2422 if (acquire)
2423 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2424 else
2425 coro_semaphore_adjust (aTHX_ av, 0);
2426
2427 return 0;
2428 }
2429 else
2430 {
2431 int i;
2432 /* if we were woken up but can't down, we look through the whole */
2433 /* waiters list and only add us if we aren't in there already */
2434 /* this avoids some degenerate memory usage cases */
2435
2436 for (i = 1; i <= AvFILLp (av); ++i)
2437 if (AvARRAY (av)[i] == SvRV (coro_current))
2438 return 1;
2439
2440 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2441 return 1;
2442 }
2443}
2444
2445static int
2446slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2449}
2450
2451static int
2452slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2453{
2454 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2455}
2456
2457static void
2458slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2459{
2460 AV *av = (AV *)SvRV (arg [0]);
2461
2462 if (SvIVX (AvARRAY (av)[0]) > 0)
2463 {
2464 frame->data = (void *)av;
2465 frame->prepare = prepare_nop;
2466 }
2467 else
2468 {
2469 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2470
2471 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2472 frame->prepare = prepare_schedule;
2473
2474 /* to avoid race conditions when a woken-up coro gets terminated */
2475 /* we arrange for a temporary on_destroy that calls adjust (0) */
2476 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2477 }
2478}
2479
2480static void
2481slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2482{
2483 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2484 frame->check = slf_check_semaphore_down;
2485}
2486
2487static void
2488slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2489{
2490 if (items >= 2)
2491 {
2492 /* callback form */
2493 AV *av = (AV *)SvRV (arg [0]);
2494 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2495
2496 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2497
2498 if (SvIVX (AvARRAY (av)[0]) > 0)
2499 coro_semaphore_adjust (aTHX_ av, 0);
2500
2501 frame->prepare = prepare_nop;
2502 frame->check = slf_check_nop;
2503 }
2504 else
2505 {
2506 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2507 frame->check = slf_check_semaphore_wait;
2508 }
2509}
2510
2511/* signal */
2512
2513static void
2514coro_signal_wake (pTHX_ AV *av, int count)
2515{
2516 SvIVX (AvARRAY (av)[0]) = 0;
2517
2518 /* now signal count waiters */
2519 while (count > 0 && AvFILLp (av) > 0)
2520 {
2521 SV *cb;
2522
2523 /* swap first two elements so we can shift a waiter */
2524 cb = AvARRAY (av)[0];
2525 AvARRAY (av)[0] = AvARRAY (av)[1];
2526 AvARRAY (av)[1] = cb;
2527
2528 cb = av_shift (av);
2529
2530 api_ready (aTHX_ cb);
2531 sv_setiv (cb, 0); /* signal waiter */
2532 SvREFCNT_dec (cb);
2533
2534 --count;
2535 }
2536}
2537
2538static int
2539slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2540{
2541 /* if we are about to throw, also stop waiting */
2542 return SvROK ((SV *)frame->data) && !CORO_THROW;
2543}
2544
2545static void
2546slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2547{
2548 AV *av = (AV *)SvRV (arg [0]);
2549
2550 if (SvIVX (AvARRAY (av)[0]))
2551 {
2552 SvIVX (AvARRAY (av)[0]) = 0;
2553 frame->prepare = prepare_nop;
2554 frame->check = slf_check_nop;
2555 }
2556 else
2557 {
2558 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2559
2560 av_push (av, waiter);
2561
2562 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2563 frame->prepare = prepare_schedule;
2564 frame->check = slf_check_signal_wait;
2565 }
2566}
2567
2568/*****************************************************************************/
2569/* Coro::AIO */
2570
2571#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2572
2573/* helper storage struct */
2574struct io_state
2575{
2576 int errorno;
2577 I32 laststype; /* U16 in 5.10.0 */
2578 int laststatval;
2579 Stat_t statcache;
2580};
2581
2582static void
2583coro_aio_callback (pTHX_ CV *cv)
2584{
2585 dXSARGS;
2586 AV *state = (AV *)GENSUB_ARG;
2587 SV *coro = av_pop (state);
2588 SV *data_sv = newSV (sizeof (struct io_state));
2589
2590 av_extend (state, items - 1);
2591
2592 sv_upgrade (data_sv, SVt_PV);
2593 SvCUR_set (data_sv, sizeof (struct io_state));
2594 SvPOK_only (data_sv);
2595
2596 {
2597 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2598
2599 data->errorno = errno;
2600 data->laststype = PL_laststype;
2601 data->laststatval = PL_laststatval;
2602 data->statcache = PL_statcache;
2603 }
2604
2605 /* now build the result vector out of all the parameters and the data_sv */
2606 {
2607 int i;
2608
2609 for (i = 0; i < items; ++i)
2610 av_push (state, SvREFCNT_inc_NN (ST (i)));
2611 }
2612
2613 av_push (state, data_sv);
2614
2615 api_ready (aTHX_ coro);
2616 SvREFCNT_dec (coro);
2617 SvREFCNT_dec ((AV *)state);
2618}
2619
2620static int
2621slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2622{
2623 AV *state = (AV *)frame->data;
2624
2625 /* if we are about to throw, return early */
2626 /* this does not cancel the aio request, but at least */
2627 /* it quickly returns */
2628 if (CORO_THROW)
2629 return 0;
2630
2631 /* one element that is an RV? repeat! */
2632 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2633 return 1;
2634
2635 /* restore status */
2636 {
2637 SV *data_sv = av_pop (state);
2638 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2639
2640 errno = data->errorno;
2641 PL_laststype = data->laststype;
2642 PL_laststatval = data->laststatval;
2643 PL_statcache = data->statcache;
2644
2645 SvREFCNT_dec (data_sv);
2646 }
2647
2648 /* push result values */
2649 {
2650 dSP;
2651 int i;
2652
2653 EXTEND (SP, AvFILLp (state) + 1);
2654 for (i = 0; i <= AvFILLp (state); ++i)
2655 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2656
2657 PUTBACK;
2658 }
2659
2660 return 0;
2661}
2662
2663static void
2664slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2665{
2666 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2667 SV *coro_hv = SvRV (coro_current);
2668 struct coro *coro = SvSTATE_hv (coro_hv);
2669
2670 /* put our coroutine id on the state arg */
2671 av_push (state, SvREFCNT_inc_NN (coro_hv));
2672
2673 /* first see whether we have a non-zero priority and set it as AIO prio */
2674 if (coro->prio)
2675 {
2676 dSP;
2677
2678 static SV *prio_cv;
2679 static SV *prio_sv;
2680
2681 if (expect_false (!prio_cv))
2682 {
2683 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2684 prio_sv = newSViv (0);
2685 }
2686
2687 PUSHMARK (SP);
2688 sv_setiv (prio_sv, coro->prio);
2689 XPUSHs (prio_sv);
2690
2691 PUTBACK;
2692 call_sv (prio_cv, G_VOID | G_DISCARD);
2693 }
2694
2695 /* now call the original request */
2696 {
2697 dSP;
2698 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2699 int i;
2700
2701 PUSHMARK (SP);
2702
2703 /* first push all args to the stack */
2704 EXTEND (SP, items + 1);
2705
2706 for (i = 0; i < items; ++i)
2707 PUSHs (arg [i]);
2708
2709 /* now push the callback closure */
2710 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2711
2712 /* now call the AIO function - we assume our request is uncancelable */
2713 PUTBACK;
2714 call_sv ((SV *)req, G_VOID | G_DISCARD);
2715 }
2716
2717 /* now that the requets is going, we loop toll we have a result */
2718 frame->data = (void *)state;
2719 frame->prepare = prepare_schedule;
2720 frame->check = slf_check_aio_req;
2721}
2722
2723static void
2724coro_aio_req_xs (pTHX_ CV *cv)
2725{
2726 dXSARGS;
2727
2728 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2729
2730 XSRETURN_EMPTY;
2731}
2732
2733/*****************************************************************************/
2734
2735#if CORO_CLONE
2736# include "clone.c"
2737#endif
2738
1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2739MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559 2740
1560PROTOTYPES: DISABLE 2741PROTOTYPES: DISABLE
1561 2742
1562BOOT: 2743BOOT:
1563{ 2744{
1564#ifdef USE_ITHREADS 2745#ifdef USE_ITHREADS
1565 MUTEX_INIT (&coro_mutex); 2746# if CORO_PTHREAD
2747 coro_thx = PERL_GET_CONTEXT;
2748# endif
1566#endif 2749#endif
1567 BOOT_PAGESIZE; 2750 BOOT_PAGESIZE;
2751
2752 cctx_current = cctx_new_empty ();
1568 2753
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2754 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2755 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571 2756
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2757 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; 2758 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; 2759 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 2760
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2761 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2762 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)); 2763 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580 2764
… …
1589 main_top_env = PL_top_env; 2773 main_top_env = PL_top_env;
1590 2774
1591 while (main_top_env->je_prev) 2775 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev; 2776 main_top_env = main_top_env->je_prev;
1593 2777
2778 {
2779 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2780
2781 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2782 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2783
2784 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2785 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2786 }
2787
1594 coroapi.ver = CORO_API_VERSION; 2788 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION; 2789 coroapi.rev = CORO_API_REVISION;
2790
1596 coroapi.transfer = api_transfer; 2791 coroapi.transfer = api_transfer;
2792
2793 coroapi.sv_state = SvSTATE_;
2794 coroapi.execute_slf = api_execute_slf;
2795 coroapi.prepare_nop = prepare_nop;
2796 coroapi.prepare_schedule = prepare_schedule;
2797 coroapi.prepare_cede = prepare_cede;
2798 coroapi.prepare_cede_notself = prepare_cede_notself;
2799
2800 {
2801 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2802
2803 if (!svp) croak ("Time::HiRes is required");
2804 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2805
2806 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2807 }
1597 2808
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2809 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599} 2810}
1600 2811
1601SV * 2812SV *
1602new (char *klass, ...) 2813new (char *klass, ...)
2814 ALIAS:
2815 Coro::new = 1
1603 CODE: 2816 CODE:
1604{ 2817{
1605 struct coro *coro; 2818 struct coro *coro;
1606 MAGIC *mg; 2819 MAGIC *mg;
1607 HV *hv; 2820 HV *hv;
2821 CV *cb;
1608 int i; 2822 int i;
2823
2824 if (items > 1)
2825 {
2826 cb = coro_sv_2cv (aTHX_ ST (1));
2827
2828 if (!ix)
2829 {
2830 if (CvISXSUB (cb))
2831 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2832
2833 if (!CvROOT (cb))
2834 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2835 }
2836 }
1609 2837
1610 Newz (0, coro, 1, struct coro); 2838 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV (); 2839 coro->args = newAV ();
1612 coro->flags = CF_NEW; 2840 coro->flags = CF_NEW;
1613 2841
… …
1618 coro->hv = hv = newHV (); 2846 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2847 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP; 2848 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2849 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622 2850
2851 if (items > 1)
2852 {
1623 av_extend (coro->args, items - 1); 2853 av_extend (coro->args, items - 1 + ix - 1);
2854
2855 if (ix)
2856 {
2857 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2858 cb = cv_coro_run;
2859 }
2860
2861 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2862
1624 for (i = 1; i < items; i++) 2863 for (i = 2; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i))); 2864 av_push (coro->args, newSVsv (ST (i)));
2865 }
1626} 2866}
1627 OUTPUT: 2867 OUTPUT:
1628 RETVAL 2868 RETVAL
1629 2869
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 2870void
1634_set_stacklevel (...) 2871transfer (...)
1635 ALIAS: 2872 PROTOTYPE: $$
1636 Coro::State::transfer = 1 2873 CODE:
1637 Coro::schedule = 2 2874 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 2875
1682bool 2876bool
1683_destroy (SV *coro_sv) 2877_destroy (SV *coro_sv)
1684 CODE: 2878 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2879 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT: 2880 OUTPUT:
1687 RETVAL 2881 RETVAL
1688 2882
1689void 2883void
1690_exit (code) 2884_exit (int code)
1691 int code
1692 PROTOTYPE: $ 2885 PROTOTYPE: $
1693 CODE: 2886 CODE:
1694 _exit (code); 2887 _exit (code);
1695 2888
2889SV *
2890clone (Coro::State coro)
2891 CODE:
2892{
2893#if CORO_CLONE
2894 struct coro *ncoro = coro_clone (coro);
2895 MAGIC *mg;
2896 /* TODO: too much duplication */
2897 ncoro->hv = newHV ();
2898 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2899 mg->mg_flags |= MGf_DUP;
2900 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2901#else
2902 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2903#endif
2904}
2905 OUTPUT:
2906 RETVAL
2907
1696int 2908int
1697cctx_stacksize (int new_stacksize = 0) 2909cctx_stacksize (int new_stacksize = 0)
2910 PROTOTYPE: ;$
1698 CODE: 2911 CODE:
1699 RETVAL = coro_stacksize; 2912 RETVAL = cctx_stacksize;
1700 if (new_stacksize) 2913 if (new_stacksize)
2914 {
1701 coro_stacksize = new_stacksize; 2915 cctx_stacksize = new_stacksize;
2916 ++cctx_gen;
2917 }
1702 OUTPUT: 2918 OUTPUT:
1703 RETVAL 2919 RETVAL
1704 2920
1705int 2921int
2922cctx_max_idle (int max_idle = 0)
2923 PROTOTYPE: ;$
2924 CODE:
2925 RETVAL = cctx_max_idle;
2926 if (max_idle > 1)
2927 cctx_max_idle = max_idle;
2928 OUTPUT:
2929 RETVAL
2930
2931int
1706cctx_count () 2932cctx_count ()
2933 PROTOTYPE:
1707 CODE: 2934 CODE:
1708 RETVAL = cctx_count; 2935 RETVAL = cctx_count;
1709 OUTPUT: 2936 OUTPUT:
1710 RETVAL 2937 RETVAL
1711 2938
1712int 2939int
1713cctx_idle () 2940cctx_idle ()
2941 PROTOTYPE:
1714 CODE: 2942 CODE:
1715 RETVAL = cctx_idle; 2943 RETVAL = cctx_idle;
1716 OUTPUT: 2944 OUTPUT:
1717 RETVAL 2945 RETVAL
1718 2946
1719void 2947void
1720list () 2948list ()
2949 PROTOTYPE:
1721 PPCODE: 2950 PPCODE:
1722{ 2951{
1723 struct coro *coro; 2952 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next) 2953 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv) 2954 if (coro->hv)
… …
1730call (Coro::State coro, SV *coderef) 2959call (Coro::State coro, SV *coderef)
1731 ALIAS: 2960 ALIAS:
1732 eval = 1 2961 eval = 1
1733 CODE: 2962 CODE:
1734{ 2963{
1735 if (coro->mainstack) 2964 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736 { 2965 {
1737 struct coro temp; 2966 struct coro temp;
1738 2967
1739 if (!(coro->flags & CF_RUNNING)) 2968 if (!(coro->flags & CF_RUNNING))
1740 { 2969 {
… …
1784 RETVAL = boolSV (coro->flags & ix); 3013 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT: 3014 OUTPUT:
1786 RETVAL 3015 RETVAL
1787 3016
1788void 3017void
3018throw (Coro::State self, SV *throw = &PL_sv_undef)
3019 PROTOTYPE: $;$
3020 CODE:
3021{
3022 struct coro *current = SvSTATE_current;
3023 SV **throwp = self == current ? &CORO_THROW : &self->except;
3024 SvREFCNT_dec (*throwp);
3025 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3026}
3027
3028void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3029api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3030 PROTOTYPE: $;$
3031 C_ARGS: aTHX_ coro, flags
1790 3032
1791SV * 3033SV *
1792has_stack (Coro::State coro) 3034has_cctx (Coro::State coro)
1793 PROTOTYPE: $ 3035 PROTOTYPE: $
1794 CODE: 3036 CODE:
1795 RETVAL = boolSV (!!coro->cctx); 3037 RETVAL = boolSV (!!coro->cctx);
1796 OUTPUT: 3038 OUTPUT:
1797 RETVAL 3039 RETVAL
… …
1802 CODE: 3044 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3045 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT: 3046 OUTPUT:
1805 RETVAL 3047 RETVAL
1806 3048
1807IV 3049UV
1808rss (Coro::State coro) 3050rss (Coro::State coro)
1809 PROTOTYPE: $ 3051 PROTOTYPE: $
1810 ALIAS: 3052 ALIAS:
1811 usecount = 1 3053 usecount = 1
1812 CODE: 3054 CODE:
… …
1818 OUTPUT: 3060 OUTPUT:
1819 RETVAL 3061 RETVAL
1820 3062
1821void 3063void
1822force_cctx () 3064force_cctx ()
3065 PROTOTYPE:
1823 CODE: 3066 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0; 3067 SvSTATE_current->cctx->idle_sp = 0;
3068
3069void
3070swap_defsv (Coro::State self)
3071 PROTOTYPE: $
3072 ALIAS:
3073 swap_defav = 1
3074 CODE:
3075 if (!self->slot)
3076 croak ("cannot swap state with coroutine that has no saved state,");
3077 else
3078 {
3079 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3080 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3081
3082 SV *tmp = *src; *src = *dst; *dst = tmp;
3083 }
3084
1826 3085
1827MODULE = Coro::State PACKAGE = Coro 3086MODULE = Coro::State PACKAGE = Coro
1828 3087
1829BOOT: 3088BOOT:
1830{ 3089{
1831 int i; 3090 int i;
1832 3091
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3092 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3093 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3094 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3095 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3096 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); 3097 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3098 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3099 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
1836 3100
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3101 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1838 SvREADONLY_on (coro_current); 3102 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3103 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3104 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1839 3105
1840 coro_stash = gv_stashpv ("Coro", TRUE); 3106 coro_stash = gv_stashpv ("Coro", TRUE);
1841 3107
1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3108 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3109 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1848 3114
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3115 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV (); 3116 coro_ready[i] = newAV ();
1851 3117
1852 { 3118 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE); 3119 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855 3120
1856 coroapi.schedule = api_schedule; 3121 coroapi.schedule = api_schedule;
3122 coroapi.schedule_to = api_schedule_to;
1857 coroapi.cede = api_cede; 3123 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself; 3124 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready; 3125 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready; 3126 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready; 3127 coroapi.nready = coro_nready;
1862 coroapi.current = coro_current; 3128 coroapi.current = coro_current;
1863 3129
1864 GCoroAPI = &coroapi; 3130 /*GCoroAPI = &coroapi;*/
1865 sv_setiv (sv, (IV)&coroapi); 3131 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv); 3132 SvREADONLY_on (sv);
1867 } 3133 }
1868} 3134}
3135
3136void
3137terminate (...)
3138 CODE:
3139 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3140
3141void
3142schedule (...)
3143 CODE:
3144 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3145
3146void
3147schedule_to (...)
3148 CODE:
3149 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3150
3151void
3152cede_to (...)
3153 CODE:
3154 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3155
3156void
3157cede (...)
3158 CODE:
3159 CORO_EXECUTE_SLF_XS (slf_init_cede);
3160
3161void
3162cede_notself (...)
3163 CODE:
3164 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3165
3166void
3167_cancel (Coro::State self)
3168 CODE:
3169 coro_state_destroy (aTHX_ self);
3170 coro_call_on_destroy (aTHX_ self);
1869 3171
1870void 3172void
1871_set_current (SV *current) 3173_set_current (SV *current)
1872 PROTOTYPE: $ 3174 PROTOTYPE: $
1873 CODE: 3175 CODE:
1874 SvREFCNT_dec (SvRV (coro_current)); 3176 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3177 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3178
3179void
3180_set_readyhook (SV *hook)
3181 PROTOTYPE: $
3182 CODE:
3183 SvREFCNT_dec (coro_readyhook);
3184 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1876 3185
1877int 3186int
1878prio (Coro::State coro, int newprio = 0) 3187prio (Coro::State coro, int newprio = 0)
3188 PROTOTYPE: $;$
1879 ALIAS: 3189 ALIAS:
1880 nice = 1 3190 nice = 1
1881 CODE: 3191 CODE:
1882{ 3192{
1883 RETVAL = coro->prio; 3193 RETVAL = coro->prio;
… …
1898 3208
1899SV * 3209SV *
1900ready (SV *self) 3210ready (SV *self)
1901 PROTOTYPE: $ 3211 PROTOTYPE: $
1902 CODE: 3212 CODE:
1903 RETVAL = boolSV (api_ready (self)); 3213 RETVAL = boolSV (api_ready (aTHX_ self));
1904 OUTPUT: 3214 OUTPUT:
1905 RETVAL 3215 RETVAL
1906 3216
1907int 3217int
1908nready (...) 3218nready (...)
… …
1911 RETVAL = coro_nready; 3221 RETVAL = coro_nready;
1912 OUTPUT: 3222 OUTPUT:
1913 RETVAL 3223 RETVAL
1914 3224
1915void 3225void
1916throw (Coro::State self, SV *throw = &PL_sv_undef) 3226_pool_handler (...)
3227 CODE:
3228 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3229
3230void
3231async_pool (SV *cv, ...)
1917 PROTOTYPE: $;$ 3232 PROTOTYPE: &@
3233 PPCODE:
3234{
3235 HV *hv = (HV *)av_pop (av_async_pool);
3236 AV *av = newAV ();
3237 SV *cb = ST (0);
3238 int i;
3239
3240 av_extend (av, items - 2);
3241 for (i = 1; i < items; ++i)
3242 av_push (av, SvREFCNT_inc_NN (ST (i)));
3243
3244 if ((SV *)hv == &PL_sv_undef)
3245 {
3246 PUSHMARK (SP);
3247 EXTEND (SP, 2);
3248 PUSHs (sv_Coro);
3249 PUSHs ((SV *)cv_pool_handler);
3250 PUTBACK;
3251 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3252 SPAGAIN;
3253
3254 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3255 }
3256
3257 {
3258 struct coro *coro = SvSTATE_hv (hv);
3259
3260 assert (!coro->invoke_cb);
3261 assert (!coro->invoke_av);
3262 coro->invoke_cb = SvREFCNT_inc (cb);
3263 coro->invoke_av = av;
3264 }
3265
3266 api_ready (aTHX_ (SV *)hv);
3267
3268 if (GIMME_V != G_VOID)
3269 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3270 else
3271 SvREFCNT_dec (hv);
3272}
3273
3274SV *
3275rouse_cb ()
3276 PROTOTYPE:
3277 CODE:
3278 RETVAL = coro_new_rouse_cb (aTHX);
3279 OUTPUT:
3280 RETVAL
3281
3282void
3283rouse_wait (...)
3284 PROTOTYPE: ;$
3285 PPCODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3287
3288
3289MODULE = Coro::State PACKAGE = PerlIO::cede
3290
3291BOOT:
3292 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3293
3294
3295MODULE = Coro::State PACKAGE = Coro::Semaphore
3296
3297SV *
3298new (SV *klass, SV *count = 0)
3299 CODE:
3300 RETVAL = sv_bless (
3301 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3302 GvSTASH (CvGV (cv))
3303 );
3304 OUTPUT:
3305 RETVAL
3306
3307# helper for Coro::Channel
3308SV *
3309_alloc (int count)
3310 CODE:
3311 RETVAL = coro_waitarray_new (aTHX_ count);
3312 OUTPUT:
3313 RETVAL
3314
3315SV *
3316count (SV *self)
3317 CODE:
3318 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3319 OUTPUT:
3320 RETVAL
3321
3322void
3323up (SV *self, int adjust = 1)
3324 ALIAS:
3325 adjust = 1
1918 CODE: 3326 CODE:
1919 SvREFCNT_dec (self->throw); 3327 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921 3328
1922void 3329void
1923swap_defsv (Coro::State self) 3330down (...)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE: 3331 CODE:
1928 if (!self->slot) 3332 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1929 croak ("cannot swap state with coroutine that has no saved state"); 3333
3334void
3335wait (...)
3336 CODE:
3337 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3338
3339void
3340try (SV *self)
3341 PPCODE:
3342{
3343 AV *av = (AV *)SvRV (self);
3344 SV *count_sv = AvARRAY (av)[0];
3345 IV count = SvIVX (count_sv);
3346
3347 if (count > 0)
3348 {
3349 --count;
3350 SvIVX (count_sv) = count;
3351 XSRETURN_YES;
3352 }
3353 else
3354 XSRETURN_NO;
3355}
3356
3357void
3358waiters (SV *self)
3359 PPCODE:
3360{
3361 AV *av = (AV *)SvRV (self);
3362 int wcount = AvFILLp (av) + 1 - 1;
3363
3364 if (GIMME_V == G_SCALAR)
3365 XPUSHs (sv_2mortal (newSViv (wcount)));
1930 else 3366 else
1931 { 3367 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3368 int i;
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3369 EXTEND (SP, wcount);
1934 3370 for (i = 1; i <= wcount; ++i)
1935 SV *tmp = *src; *src = *dst; *dst = tmp; 3371 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1936 } 3372 }
3373}
1937 3374
1938# for async_pool speedup 3375MODULE = Coro::State PACKAGE = Coro::Signal
3376
3377SV *
3378new (SV *klass)
3379 CODE:
3380 RETVAL = sv_bless (
3381 coro_waitarray_new (aTHX_ 0),
3382 GvSTASH (CvGV (cv))
3383 );
3384 OUTPUT:
3385 RETVAL
3386
1939void 3387void
1940_pool_1 (SV *cb) 3388wait (...)
1941 CODE: 3389 CODE:
1942{ 3390 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 3391
1977void 3392void
1978_pool_2 (SV *cb) 3393broadcast (SV *self)
3394 CODE:
3395{
3396 AV *av = (AV *)SvRV (self);
3397 coro_signal_wake (aTHX_ av, AvFILLp (av));
3398}
3399
3400void
3401send (SV *self)
3402 CODE:
3403{
3404 AV *av = (AV *)SvRV (self);
3405
3406 if (AvFILLp (av))
3407 coro_signal_wake (aTHX_ av, 1);
3408 else
3409 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3410}
3411
3412IV
3413awaited (SV *self)
1979 CODE: 3414 CODE:
1980{ 3415 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: 3416 OUTPUT:
2027 RETVAL 3417 RETVAL
2028 3418
3419
3420MODULE = Coro::State PACKAGE = Coro::AnyEvent
3421
3422BOOT:
3423 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3424
2029void 3425void
2030_set_state (char *data_) 3426_schedule (...)
2031 PROTOTYPE: $
2032 CODE: 3427 CODE:
2033{ 3428{
2034 struct io_state *data = (void *)data_; 3429 static int incede;
2035 3430
2036 errno = data->errorno; 3431 api_cede_notself (aTHX);
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041 3432
3433 ++incede;
3434 while (coro_nready >= incede && api_cede (aTHX))
3435 ;
3436
3437 sv_setsv (sv_activity, &PL_sv_undef);
3438 if (coro_nready >= incede)
3439 {
3440 PUSHMARK (SP);
3441 PUTBACK;
3442 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3443 }
3444
3445 --incede;
3446}
3447
3448
3449MODULE = Coro::State PACKAGE = Coro::AIO
3450
3451void
3452_register (char *target, char *proto, SV *req)
3453 CODE:
3454{
3455 CV *req_cv = coro_sv_2cv (aTHX_ req);
3456 /* newXSproto doesn't return the CV on 5.8 */
3457 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3458 sv_setpv ((SV *)slf_cv, proto);
3459 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3460}
3461

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