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Comparing Coro/Coro/State.xs (file contents):
Revision 1.238 by root, Sat May 31 12:10:55 2008 UTC vs.
Revision 1.347 by root, Wed Jun 10 00:00:02 2009 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# define setjmp _setjmp // deep magic, don't ask 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_dirty
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 */
180static SV *sv_idle; /* $Coro::idle */
164 181
165static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 184static SV *rv_diehook;
168static SV *rv_warnhook; 185static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 186static HV *hv_sig; /* %SIG */
170 187
171/* async_pool helper stuff */ 188/* async_pool helper stuff */
172static SV *sv_pool_rss; 189static SV *sv_pool_rss;
173static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
174static AV *av_async_pool; 192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
175 196
176/* Coro::AnyEvent */ 197/* Coro::AnyEvent */
177static SV *sv_activity; 198static SV *sv_activity;
178 199
179static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 210};
190 211
191/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 213typedef struct coro_cctx
214{
193 struct coro_cctx *next; 215 struct coro_cctx *next;
194 216
195 /* the stack */ 217 /* the stack */
196 void *sptr; 218 void *sptr;
197 size_t ssize; 219 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 224 JMPENV *top_env;
203 coro_context cctx; 225 coro_context cctx;
204 226
227 U32 gen;
205#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
206 int valgrind_id; 229 int valgrind_id;
207#endif 230#endif
208 unsigned char flags; 231 unsigned char flags;
209} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
210 237
211enum { 238enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
216}; 244};
217 245
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 247typedef struct
248{
220 SV *defsv; 249 SV *defsv;
221 AV *defav; 250 AV *defav;
222 SV *errsv; 251 SV *errsv;
223 SV *irsgv; 252 SV *irsgv;
253 HV *hinthv;
224#define VAR(name,type) type name; 254#define VAR(name,type) type name;
225# include "state.h" 255# include "state.h"
226#undef VAR 256#undef VAR
227} perl_slots; 257} perl_slots;
228 258
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 260
231/* this is a structure representing a perl-level coroutine */ 261/* this is a structure representing a perl-level coroutine */
232struct coro { 262struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 263 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 264 coro_cctx *cctx;
235 265
236 /* process data */ 266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 271 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 272 perl_slots *slot; /* basically the saved sp */
239 273
274 CV *startcv; /* the CV to execute */
240 AV *args; /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 276 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 277 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
244 280
245 /* statistics */ 281 /* statistics */
246 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
247 283
248 /* coro process data */ 284 /* coro process data */
249 int prio; 285 int prio;
250 SV *throw; /* exception to be thrown */ 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
251 288
252 /* async_pool */ 289 /* async_pool */
253 SV *saved_deffh; 290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
254 297
255 /* linked list */ 298 /* linked list */
256 struct coro *next, *prev; 299 struct coro *next, *prev;
257}; 300};
258 301
259typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
304
305/* the following variables are effectively part of the perl context */
306/* and get copied between struct coro and these variables */
307/* the mainr easonw e don't support windows process emulation */
308static struct CoroSLF slf_frame; /* the current slf frame */
261 309
262/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
263 311
264#define PRIO_MAX 3 312#define PRIO_MAX 3
265#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 317#define PRIO_MIN -4
270 318
271/* for Coro.pm */ 319/* for Coro.pm */
272static SV *coro_current; 320static SV *coro_current;
273static SV *coro_readyhook; 321static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
275static int coro_nready; 323static CV *cv_coro_run, *cv_coro_terminate;
276static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
277 326
278/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
279 328
280static SV * 329static SV *
281coro_get_sv (pTHX_ const char *name, int create) 330coro_get_sv (pTHX_ const char *name, int create)
… …
305 get_hv (name, create); 354 get_hv (name, create);
306#endif 355#endif
307 return get_hv (name, create); 356 return get_hv (name, create);
308} 357}
309 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
370 return cv;
371}
372
373/*****************************************************************************/
374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
310static AV * 425static AV *
311coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
312{ 427{
313 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
314 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
315 430
316 newpadlist = newAV (); 431 newpadlist = newAV ();
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 437#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 439 --AvFILLp (padlist);
325 440
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
327 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
328 443
329 return newpadlist; 444 return newpadlist;
330} 445}
331 446
332static void 447static void
333free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
334{ 449{
335 /* may be during global destruction */ 450 /* may be during global destruction */
336 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
337 { 452 {
338 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
339 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
340 { 456 {
341 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
342 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
343 { 459 I32 j = AvFILLp (av);
344 SV *sv; 460
345 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
346 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
347
348 SvREFCNT_dec (*svp);
349 }
350 } 466 }
351 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
352 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
353 } 472 }
354} 473}
355 474
356static int 475static int
… …
361 480
362 /* casting is fun. */ 481 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
365 484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
366 return 0; 487 return 0;
367} 488}
368
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 489
372static MGVTBL coro_cv_vtbl = { 490static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 491 0, 0, 0, 0,
374 coro_cv_free 492 coro_cv_free
375}; 493};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
412 494
413/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
414static void 496static void
415get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
416{ 498{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 504 else
423 { 505 {
424#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
430#else 513#else
431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
432#endif 515#endif
433 } 516 }
434} 517}
435 518
436static void 519static void
… …
443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
444 527
445 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
446 529
447 if (expect_false (AvFILLp (av) >= AvMAX (av))) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
448 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
449 532
450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
451} 534}
452 535
453/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
454 540
455static void 541static void
456load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
457{ 543{
458 perl_slots *slot = c->slot; 544 perl_slots *slot = c->slot;
459 c->slot = 0; 545 c->slot = 0;
460 546
461 PL_mainstack = c->mainstack; 547 PL_mainstack = c->mainstack;
462 548
463 GvSV (PL_defgv) = slot->defsv; 549 GvSV (PL_defgv) = slot->defsv;
464 GvAV (PL_defgv) = slot->defav; 550 GvAV (PL_defgv) = slot->defav;
465 GvSV (PL_errgv) = slot->errsv; 551 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv; 552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
467 554
468 #define VAR(name,type) PL_ ## name = slot->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h" 556 # include "state.h"
470 #undef VAR 557 #undef VAR
471 558
… …
482 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
483 } 570 }
484 571
485 PUTBACK; 572 PUTBACK;
486 } 573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
487} 585}
488 586
489static void 587static void
490save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
491{ 589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
492 { 601 {
493 dSP; 602 dSP;
494 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
551 c->mainstack = PL_mainstack; 660 c->mainstack = PL_mainstack;
552 661
553 { 662 {
554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
555 664
556 slot->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
557 slot->defsv = DEFSV; 666 slot->defsv = DEFSV;
558 slot->errsv = ERRSV; 667 slot->errsv = ERRSV;
559 slot->irsgv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
560 670
561 #define VAR(name,type) slot->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
562 # include "state.h" 672 # include "state.h"
563 #undef VAR 673 #undef VAR
564 } 674 }
565} 675}
566 676
567/* 677/*
568 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
572 */ 682 */
573#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
575#else 685#else
576static void 686static void
577coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
578{ 688{
579 PL_curstackinfo = new_stackinfo(32, 8); 689 PL_curstackinfo = new_stackinfo(32, 8);
… …
616 726
617/* 727/*
618 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
619 */ 729 */
620static void 730static void
621coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
622{ 732{
623 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
625 735
626 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
642#if !PERL_VERSION_ATLEAST (5,10,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
643 Safefree (PL_retstack); 753 Safefree (PL_retstack);
644#endif 754#endif
645} 755}
646 756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
647static size_t 766static size_t
648coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
649{ 768{
650 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
651 770
652 if (coro->mainstack) 771 if (coro->mainstack)
653 { 772 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
658 { 774 {
659 slot = &tmp_slot; 775 #define SYM(sym) PL_ ## sym
660 776 CORO_RSS;
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR 777 #undef SYM
664 } 778 }
665 else 779 else
666 slot = coro->slot; 780 {
667 781 #define SYM(sym) coro->slot->sym
668 rss += sizeof (slot->curstackinfo); 782 CORO_RSS;
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 783 #undef SYM
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 784 }
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 } 785 }
680 786
681 return rss; 787 return rss;
682} 788}
683 789
684/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
685 791
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
688 795
689/* apparently < 5.8.8 */ 796/* apparently < 5.8.8 */
690#undef MgPV_nolen_const
691#ifndef MgPV_nolen_const 797#ifndef MgPV_nolen_const
692#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ 798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
693 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \ 799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
694 (const char*)(mg)->mg_ptr) 800 (const char*)(mg)->mg_ptr)
695#endif 801#endif
696 802
697/* 803/*
698 * This overrides the default magic get method of %SIG elements. 804 * This overrides the default magic get method of %SIG elements.
699 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
700 * and instead of tryign to save and restore the hash elements, we just provide 806 * and instead of trying to save and restore the hash elements, we just provide
701 * readback here. 807 * readback here.
702 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
703 * not expecting this to actually change the hook. This is a potential problem
704 * when a schedule happens then, but we ignore this.
705 */ 808 */
706static int 809static int
707coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
708{ 811{
709 const char *s = MgPV_nolen_const (mg); 812 const char *s = MgPV_nolen_const (mg);
710 813
711 if (*s == '_') 814 if (*s == '_')
712 { 815 {
713 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 816 SV **svp = 0;
714 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
715 } 826 }
716 827
717 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
718} 829}
719 830
720static int 831static int
721coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
722{ 833{
723 const char *s = MgPV_nolen_const (mg); 834 const char *s = MgPV_nolen_const (mg);
724 835
725 if (*s == '_') 836 if (*s == '_')
726 { 837 {
… …
730 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
731 842
732 if (svp) 843 if (svp)
733 { 844 {
734 SV *old = *svp; 845 SV *old = *svp;
735 *svp = newSVsv (sv); 846 *svp = 0;
736 SvREFCNT_dec (old); 847 SvREFCNT_dec (old);
737 return 0; 848 return 0;
738 } 849 }
739 } 850 }
740 851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
741 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
742} 877}
743 878
744static void 879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
745coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
746{ 902{
747 /* 903 /*
748 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
749 */ 905 */
… …
751 907
752 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
753 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
754 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
755 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
756 PL_curpm = 0; 915 PL_curpm = 0;
757 PL_curpad = 0; 916 PL_curpad = 0;
758 PL_localizing = 0; 917 PL_localizing = 0;
759 PL_dirty = 0; 918 PL_dirty = 0;
760 PL_restartop = 0; 919 PL_restartop = 0;
761#if PERL_VERSION_ATLEAST (5,10,0) 920#if PERL_VERSION_ATLEAST (5,10,0)
762 PL_parser = 0; 921 PL_parser = 0;
763#endif 922#endif
923 PL_hints = 0;
764 924
765 /* recreate the die/warn hooks */ 925 /* recreate the die/warn hooks */
766 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
767 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
768 928
769 GvSV (PL_defgv) = newSV (0); 929 GvSV (PL_defgv) = newSV (0);
770 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
771 GvSV (PL_errgv) = newSV (0); 931 GvSV (PL_errgv) = newSV (0);
772 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
773 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
774 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
775 936
776 { 937 {
777 dSP; 938 dSP;
778 LOGOP myop; 939 UNOP myop;
779 940
780 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
781 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
782 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
783 945
784 PUSHMARK (SP); 946 PUSHMARK (SP);
785 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 947 PUSHs ((SV *)coro->startcv);
786 PUTBACK; 948 PUTBACK;
787 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
788 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
789 SPAGAIN;
790 } 951 }
791 952
792 /* this newly created coroutine might be run on an existing cctx which most 953 /* this newly created coroutine might be run on an existing cctx which most
793 * likely was suspended in set_stacklevel, called from entersub. 954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
794 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
795 * so we ENTER here for symmetry
796 */ 955 */
797 ENTER; 956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
798} 957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
799 958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
800static void 971static void
801coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
802{ 973{
803 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
804 { 975 {
805 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
806 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
814 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
815 986
816 /* unwind main stack */ 987 /* unwind main stack */
817 dounwind (-1); 988 dounwind (-1);
818 } 989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
819 996
820 SvREFCNT_dec (GvSV (PL_defgv)); 997 SvREFCNT_dec (GvSV (PL_defgv));
821 SvREFCNT_dec (GvAV (PL_defgv)); 998 SvREFCNT_dec (GvAV (PL_defgv));
822 SvREFCNT_dec (GvSV (PL_errgv)); 999 SvREFCNT_dec (GvSV (PL_errgv));
823 SvREFCNT_dec (PL_defoutgv); 1000 SvREFCNT_dec (PL_defoutgv);
824 SvREFCNT_dec (PL_rs); 1001 SvREFCNT_dec (PL_rs);
825 SvREFCNT_dec (GvSV (irsgv)); 1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
826 1004
827 SvREFCNT_dec (PL_diehook); 1005 SvREFCNT_dec (PL_diehook);
828 SvREFCNT_dec (PL_warnhook); 1006 SvREFCNT_dec (PL_warnhook);
829 1007
830 SvREFCNT_dec (coro->saved_deffh); 1008 SvREFCNT_dec (coro->saved_deffh);
831 SvREFCNT_dec (coro->throw); 1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
832 1012
833 coro_destroy_stacks (aTHX); 1013 coro_destruct_stacks (aTHX);
834} 1014}
835 1015
836static void 1016INLINE void
837free_coro_mortal (pTHX) 1017free_coro_mortal (pTHX)
838{ 1018{
839 if (expect_true (coro_mortal)) 1019 if (expect_true (coro_mortal))
840 { 1020 {
841 SvREFCNT_dec (coro_mortal); 1021 SvREFCNT_dec (coro_mortal);
… …
846static int 1026static int
847runops_trace (pTHX) 1027runops_trace (pTHX)
848{ 1028{
849 COP *oldcop = 0; 1029 COP *oldcop = 0;
850 int oldcxix = -2; 1030 int oldcxix = -2;
851 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
852 coro_cctx *cctx = coro->cctx;
853 1031
854 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
855 { 1033 {
856 PERL_ASYNC_CHECK (); 1034 PERL_ASYNC_CHECK ();
857 1035
858 if (cctx->flags & CC_TRACE_ALL) 1036 if (cctx_current->flags & CC_TRACE_ALL)
859 { 1037 {
860 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
861 { 1039 {
862 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
863 SV **bot, **top; 1041 SV **bot, **top;
864 AV *av = newAV (); /* return values */ 1042 AV *av = newAV (); /* return values */
865 SV **cb; 1043 SV **cb;
… …
875 : cx->blk_gimme == G_SCALAR ? bot + 1 1053 : cx->blk_gimme == G_SCALAR ? bot + 1
876 : bot; 1054 : bot;
877 1055
878 av_extend (av, top - bot); 1056 av_extend (av, top - bot);
879 while (bot < top) 1057 while (bot < top)
880 av_push (av, SvREFCNT_inc (*bot++)); 1058 av_push (av, SvREFCNT_inc_NN (*bot++));
881 1059
882 PL_runops = RUNOPS_DEFAULT; 1060 PL_runops = RUNOPS_DEFAULT;
883 ENTER; 1061 ENTER;
884 SAVETMPS; 1062 SAVETMPS;
885 EXTEND (SP, 3); 1063 EXTEND (SP, 3);
… …
902 1080
903 if (PL_curcop != &PL_compiling) 1081 if (PL_curcop != &PL_compiling)
904 { 1082 {
905 SV **cb; 1083 SV **cb;
906 1084
907 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
908 { 1086 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910 1088
911 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
912 { 1090 {
913 runops_proc_t old_runops = PL_runops;
914 dSP; 1091 dSP;
915 GV *gv = CvGV (cx->blk_sub.cv); 1092 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0)); 1093 SV *fullname = sv_2mortal (newSV (0));
917 1094
918 if (isGV (gv)) 1095 if (isGV (gv))
… …
923 SAVETMPS; 1100 SAVETMPS;
924 EXTEND (SP, 3); 1101 EXTEND (SP, 3);
925 PUSHMARK (SP); 1102 PUSHMARK (SP);
926 PUSHs (&PL_sv_yes); 1103 PUSHs (&PL_sv_yes);
927 PUSHs (fullname); 1104 PUSHs (fullname);
928 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
929 PUTBACK; 1106 PUTBACK;
930 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
931 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
932 SPAGAIN; 1109 SPAGAIN;
933 FREETMPS; 1110 FREETMPS;
… …
936 } 1113 }
937 1114
938 oldcxix = cxstack_ix; 1115 oldcxix = cxstack_ix;
939 } 1116 }
940 1117
941 if (cctx->flags & CC_TRACE_LINE) 1118 if (cctx_current->flags & CC_TRACE_LINE)
942 { 1119 {
943 dSP; 1120 dSP;
944 1121
945 PL_runops = RUNOPS_DEFAULT; 1122 PL_runops = RUNOPS_DEFAULT;
946 ENTER; 1123 ENTER;
… …
965 1142
966 TAINT_NOT; 1143 TAINT_NOT;
967 return 0; 1144 return 0;
968} 1145}
969 1146
970/* inject a fake call to Coro::State::_cctx_init into the execution */ 1147static struct CoroSLF cctx_ssl_frame;
971/* _cctx_init should be careful, as it could be called at almost any time */ 1148
972/* during execution of a perl program */ 1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
973static void NOINLINE 1164static void NOINLINE
974cctx_prepare (pTHX_ coro_cctx *cctx) 1165cctx_prepare (pTHX)
975{ 1166{
976 dSP;
977 LOGOP myop;
978
979 PL_top_env = &PL_start_env; 1167 PL_top_env = &PL_start_env;
980 1168
981 if (cctx->flags & CC_TRACE) 1169 if (cctx_current->flags & CC_TRACE)
982 PL_runops = runops_trace; 1170 PL_runops = runops_trace;
983 1171
984 Zero (&myop, 1, LOGOP); 1172 /* we already must be executing an SLF op, there is no other valid way
985 myop.op_next = PL_op; 1173 * that can lead to creation of a new cctx */
986 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
987 1176
988 PUSHMARK (SP); 1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
989 EXTEND (SP, 2); 1178 cctx_ssl_frame = slf_frame;
990 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1179
991 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1180 slf_frame.prepare = slf_prepare_set_stacklevel;
992 PUTBACK; 1181 slf_frame.check = slf_check_set_stacklevel;
993 PL_op = (OP *)&myop; 1182}
994 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1183
995 SPAGAIN; 1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
996} 1189}
997 1190
998/* 1191/*
999 * this is a _very_ stripped down perl interpreter ;) 1192 * this is a _very_ stripped down perl interpreter ;)
1000 */ 1193 */
1001static void 1194static void
1002cctx_run (void *arg) 1195cctx_run (void *arg)
1003{ 1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
1004 dTHX; 1203 dTHX;
1005 1204
1006 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1205 /* normally we would need to skip the entersub here */
1007 UNLOCK; 1206 /* not doing so will re-execute it, which is exactly what we want */
1008
1009 /* we now skip the entersub that lead to transfer() */
1010 PL_op = PL_op->op_next; 1207 /* PL_nop = PL_nop->op_next */
1011 1208
1012 /* inject a fake subroutine call to cctx_init */ 1209 /* inject a fake subroutine call to cctx_init */
1013 cctx_prepare (aTHX_ (coro_cctx *)arg); 1210 cctx_prepare (aTHX);
1014 1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
1015 /* somebody or something will hit me for both perl_run and PL_restartop */ 1215 /* somebody or something will hit me for both perl_run and PL_restartop */
1016 PL_restartop = PL_op; 1216 PL_restartop = PL_op;
1017 perl_run (PL_curinterp); 1217 perl_run (PL_curinterp);
1018
1019 /* 1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
1020 * If perl-run returns we assume exit() was being called or the coro 1224 * If perl-run returns we assume exit() was being called or the coro
1021 * fell off the end, which seems to be the only valid (non-bug) 1225 * fell off the end, which seems to be the only valid (non-bug)
1022 * reason for perl_run to return. We try to exit by jumping to the 1226 * reason for perl_run to return. We try to exit by jumping to the
1023 * bootstrap-time "top" top_env, as we cannot restore the "main" 1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
1024 * coroutine as Coro has no such concept 1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
1025 */ 1231 */
1026 PL_top_env = main_top_env; 1232 PL_top_env = main_top_env;
1027 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
1028} 1235}
1029 1236
1030static coro_cctx * 1237static coro_cctx *
1031cctx_new () 1238cctx_new ()
1032{ 1239{
1033 coro_cctx *cctx; 1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
1034 void *stack_start; 1269 void *stack_start;
1035 size_t stack_size; 1270 size_t stack_size;
1036 1271
1037 ++cctx_count;
1038
1039 Newz (0, cctx, 1, coro_cctx);
1040
1041#if HAVE_MMAP 1272#if HAVE_MMAP
1042 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1043 /* mmap supposedly does allocate-on-write for us */ 1274 /* mmap supposedly does allocate-on-write for us */
1044 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1045 1276
1046 if (cctx->sptr != (void *)-1) 1277 if (cctx->sptr != (void *)-1)
1047 { 1278 {
1048# if CORO_STACKGUARD 1279 #if CORO_STACKGUARD
1049 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1050# endif 1281 #endif
1051 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1052 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1053 cctx->flags |= CC_MAPPED; 1284 cctx->flags |= CC_MAPPED;
1054 } 1285 }
1055 else 1286 else
1056#endif 1287#endif
1057 { 1288 {
1058 cctx->ssize = coro_stacksize * (long)sizeof (long); 1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1059 New (0, cctx->sptr, coro_stacksize, long); 1290 New (0, cctx->sptr, cctx_stacksize, long);
1060 1291
1061 if (!cctx->sptr) 1292 if (!cctx->sptr)
1062 { 1293 {
1063 perror ("FATAL: unable to allocate stack for coroutine"); 1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1064 _exit (EXIT_FAILURE); 1295 _exit (EXIT_FAILURE);
1065 } 1296 }
1066 1297
1067 stack_start = cctx->sptr; 1298 stack_start = cctx->sptr;
1068 stack_size = cctx->ssize; 1299 stack_size = cctx->ssize;
1069 } 1300 }
1070 1301
1071 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
1072 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1073 1307
1074 return cctx; 1308 return cctx;
1075} 1309}
1076 1310
… …
1078cctx_destroy (coro_cctx *cctx) 1312cctx_destroy (coro_cctx *cctx)
1079{ 1313{
1080 if (!cctx) 1314 if (!cctx)
1081 return; 1315 return;
1082 1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
1083 --cctx_count; 1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
1084 1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
1085#if CORO_USE_VALGRIND 1325 #if CORO_USE_VALGRIND
1086 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1087#endif 1327 #endif
1088 1328
1089#if HAVE_MMAP 1329#if HAVE_MMAP
1090 if (cctx->flags & CC_MAPPED) 1330 if (cctx->flags & CC_MAPPED)
1091 munmap (cctx->sptr, cctx->ssize); 1331 munmap (cctx->sptr, cctx->ssize);
1092 else 1332 else
1093#endif 1333#endif
1094 Safefree (cctx->sptr); 1334 Safefree (cctx->sptr);
1335 }
1095 1336
1096 Safefree (cctx); 1337 Safefree (cctx);
1097} 1338}
1098 1339
1099/* wether this cctx should be destructed */ 1340/* wether this cctx should be destructed */
1100#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1101 1342
1102static coro_cctx * 1343static coro_cctx *
1103cctx_get (pTHX) 1344cctx_get (pTHX)
1104{ 1345{
1105 while (expect_true (cctx_first)) 1346 while (expect_true (cctx_first))
… …
1112 return cctx; 1353 return cctx;
1113 1354
1114 cctx_destroy (cctx); 1355 cctx_destroy (cctx);
1115 } 1356 }
1116 1357
1117 return cctx_new (); 1358 return cctx_new_run ();
1118} 1359}
1119 1360
1120static void 1361static void
1121cctx_put (coro_cctx *cctx) 1362cctx_put (coro_cctx *cctx)
1122{ 1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
1123 /* free another cctx if overlimit */ 1366 /* free another cctx if overlimit */
1124 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1367 if (expect_false (cctx_idle >= cctx_max_idle))
1125 { 1368 {
1126 coro_cctx *first = cctx_first; 1369 coro_cctx *first = cctx_first;
1127 cctx_first = first->next; 1370 cctx_first = first->next;
1128 --cctx_idle; 1371 --cctx_idle;
1129 1372
… …
1138/** coroutine switching *****************************************************/ 1381/** coroutine switching *****************************************************/
1139 1382
1140static void 1383static void
1141transfer_check (pTHX_ struct coro *prev, struct coro *next) 1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1142{ 1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1143 if (expect_true (prev != next)) 1388 if (expect_true (prev != next))
1144 { 1389 {
1145 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1390 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1146 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1147 1392
1148 if (expect_false (next->flags & CF_RUNNING))
1149 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1150
1151 if (expect_false (next->flags & CF_DESTROYED)) 1393 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1152 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1153 1395
1154#if !PERL_VERSION_ATLEAST (5,10,0) 1396#if !PERL_VERSION_ATLEAST (5,10,0)
1155 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1156 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1157#endif 1399#endif
1158 } 1400 }
1159} 1401}
1160 1402
1161/* always use the TRANSFER macro */ 1403/* always use the TRANSFER macro */
1162static void NOINLINE 1404static void NOINLINE /* noinline so we have a fixed stackframe */
1163transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1164{ 1406{
1165 dSTACKLEVEL; 1407 dSTACKLEVEL;
1166 static volatile int has_throw;
1167 1408
1168 /* sometimes transfer is only called to set idle_sp */ 1409 /* sometimes transfer is only called to set idle_sp */
1169 if (expect_false (!next)) 1410 if (expect_false (!prev))
1170 { 1411 {
1171 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1412 cctx_current->idle_sp = STACKLEVEL;
1172 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1173 } 1414 }
1174 else if (expect_true (prev != next)) 1415 else if (expect_true (prev != next))
1175 { 1416 {
1176 coro_cctx *prev__cctx; 1417 coro_cctx *cctx_prev;
1177 1418
1178 if (expect_false (prev->flags & CF_NEW)) 1419 if (expect_false (prev->flags & CF_NEW))
1179 { 1420 {
1180 /* create a new empty context */ 1421 /* create a new empty/source context */
1181 Newz (0, prev->cctx, 1, coro_cctx);
1182 prev->flags &= ~CF_NEW; 1422 prev->flags &= ~CF_NEW;
1183 prev->flags |= CF_RUNNING; 1423 prev->flags |= CF_RUNNING;
1184 } 1424 }
1185 1425
1186 prev->flags &= ~CF_RUNNING; 1426 prev->flags &= ~CF_RUNNING;
1187 next->flags |= CF_RUNNING; 1427 next->flags |= CF_RUNNING;
1188
1189 LOCK;
1190 1428
1191 /* first get rid of the old state */ 1429 /* first get rid of the old state */
1192 save_perl (aTHX_ prev); 1430 save_perl (aTHX_ prev);
1193 1431
1194 if (expect_false (next->flags & CF_NEW)) 1432 if (expect_false (next->flags & CF_NEW))
… …
1199 coro_setup (aTHX_ next); 1437 coro_setup (aTHX_ next);
1200 } 1438 }
1201 else 1439 else
1202 load_perl (aTHX_ next); 1440 load_perl (aTHX_ next);
1203 1441
1204 prev__cctx = prev->cctx;
1205
1206 /* possibly "free" the cctx */ 1442 /* possibly untie and reuse the cctx */
1207 if (expect_true ( 1443 if (expect_true (
1208 prev__cctx->idle_sp == STACKLEVEL 1444 cctx_current->idle_sp == STACKLEVEL
1209 && !(prev__cctx->flags & CC_TRACE) 1445 && !(cctx_current->flags & CC_TRACE)
1210 && !force_cctx 1446 && !force_cctx
1211 )) 1447 ))
1212 { 1448 {
1213 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1214 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1450 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1215 1451
1216 prev->cctx = 0;
1217
1218 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1219 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1220 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1221 if (!next->cctx) 1455 if (expect_true (!next->cctx))
1222 next->cctx = cctx_get (aTHX); 1456 next->cctx = cctx_get (aTHX);
1223 1457
1224 cctx_put (prev__cctx); 1458 cctx_put (cctx_current);
1225 } 1459 }
1460 else
1461 prev->cctx = cctx_current;
1226 1462
1227 ++next->usecount; 1463 ++next->usecount;
1228 1464
1229 if (expect_true (!next->cctx)) 1465 cctx_prev = cctx_current;
1230 next->cctx = cctx_get (aTHX); 1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1231 1467
1232 has_throw = !!next->throw; 1468 next->cctx = 0;
1233 1469
1234 if (expect_false (prev__cctx != next->cctx)) 1470 if (expect_false (cctx_prev != cctx_current))
1235 { 1471 {
1236 prev__cctx->top_env = PL_top_env; 1472 cctx_prev->top_env = PL_top_env;
1237 PL_top_env = next->cctx->top_env; 1473 PL_top_env = cctx_current->top_env;
1238 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1239 } 1475 }
1240 1476
1241 free_coro_mortal (aTHX); 1477 transfer_tail (aTHX);
1242 UNLOCK;
1243
1244 if (expect_false (has_throw))
1245 {
1246 struct coro *coro = SvSTATE (coro_current);
1247
1248 if (coro->throw)
1249 {
1250 SV *exception = coro->throw;
1251 coro->throw = 0;
1252 sv_setsv (ERRSV, exception);
1253 croak (0);
1254 }
1255 }
1256 } 1478 }
1257} 1479}
1258
1259struct transfer_args
1260{
1261 struct coro *prev, *next;
1262};
1263 1480
1264#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1265#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1266 1483
1267/** high level stuff ********************************************************/ 1484/** high level stuff ********************************************************/
… …
1269static int 1486static int
1270coro_state_destroy (pTHX_ struct coro *coro) 1487coro_state_destroy (pTHX_ struct coro *coro)
1271{ 1488{
1272 if (coro->flags & CF_DESTROYED) 1489 if (coro->flags & CF_DESTROYED)
1273 return 0; 1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
1274 1494
1275 coro->flags |= CF_DESTROYED; 1495 coro->flags |= CF_DESTROYED;
1276 1496
1277 if (coro->flags & CF_READY) 1497 if (coro->flags & CF_READY)
1278 { 1498 {
1279 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
1280 /* alternative: look through all ready queues and remove the coro */ 1500 /* alternative: look through all ready queues and remove the coro */
1281 LOCK;
1282 --coro_nready; 1501 --coro_nready;
1283 UNLOCK;
1284 } 1502 }
1285 else 1503 else
1286 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1287 1505
1288 if (coro->mainstack && coro->mainstack != main_mainstack) 1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
1289 { 1510 {
1290 struct coro temp; 1511 struct coro *current = SvSTATE_current;
1291 1512
1292 if (coro->flags & CF_RUNNING) 1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1293 croak ("FATAL: tried to destroy currently running coroutine");
1294 1514
1295 save_perl (aTHX_ &temp); 1515 save_perl (aTHX_ current);
1296 load_perl (aTHX_ coro); 1516 load_perl (aTHX_ coro);
1297 1517
1298 coro_destroy (aTHX_ coro); 1518 coro_destruct_perl (aTHX_ coro);
1299 1519
1300 load_perl (aTHX_ &temp); 1520 load_perl (aTHX_ current);
1301 1521
1302 coro->slot = 0; 1522 coro->slot = 0;
1303 } 1523 }
1304 1524
1305 cctx_destroy (coro->cctx); 1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
1306 SvREFCNT_dec (coro->args); 1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
1307 1529
1308 if (coro->next) coro->next->prev = coro->prev; 1530 if (coro->next) coro->next->prev = coro->prev;
1309 if (coro->prev) coro->prev->next = coro->next; 1531 if (coro->prev) coro->prev->next = coro->next;
1310 if (coro == coro_first) coro_first = coro->next; 1532 if (coro == coro_first) coro_first = coro->next;
1311 1533
… …
1349# define MGf_DUP 0 1571# define MGf_DUP 0
1350#endif 1572#endif
1351}; 1573};
1352 1574
1353static void 1575static void
1354prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1355{ 1577{
1356 ta->prev = SvSTATE (prev_sv); 1578 ta->prev = SvSTATE (prev_sv);
1357 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE (next_sv);
1358 TRANSFER_CHECK (*ta); 1580 TRANSFER_CHECK (*ta);
1359} 1581}
1360 1582
1361static void 1583static void
1362api_transfer (SV *prev_sv, SV *next_sv) 1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1363{ 1585{
1364 dTHX;
1365 struct transfer_args ta; 1586 struct coro_transfer_args ta;
1366 1587
1367 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1368 TRANSFER (ta, 1); 1589 TRANSFER (ta, 1);
1369} 1590}
1370 1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
1600static SV *
1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1602{
1603 CV *cv = (CV *)newSV (0);
1604
1605 sv_upgrade ((SV *)cv, SVt_PVCV);
1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1613}
1614
1371/** Coro ********************************************************************/ 1615/** Coro ********************************************************************/
1372 1616
1373static void 1617INLINE void
1374coro_enq (pTHX_ SV *coro_sv) 1618coro_enq (pTHX_ struct coro *coro)
1375{ 1619{
1376 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1377}
1378 1621
1379static SV * 1622 SvREFCNT_inc_NN (coro->hv);
1623
1624 coro->next_ready = 0;
1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1626 ready [1] = coro;
1627}
1628
1629INLINE struct coro *
1380coro_deq (pTHX) 1630coro_deq (pTHX)
1381{ 1631{
1382 int prio; 1632 int prio;
1383 1633
1384 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1385 if (AvFILLp (coro_ready [prio]) >= 0) 1635 {
1386 return av_shift (coro_ready [prio]); 1636 struct coro **ready = coro_ready [prio];
1387 1637
1388 return 0; 1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1389} 1645}
1390 1646
1391static int 1647static int
1392api_ready (SV *coro_sv) 1648api_ready (pTHX_ SV *coro_sv)
1393{ 1649{
1394 dTHX;
1395 struct coro *coro; 1650 struct coro *coro;
1396 SV *sv_hook; 1651 SV *sv_hook;
1397 void (*xs_hook)(void); 1652 void (*xs_hook)(void);
1398 1653
1399 if (SvROK (coro_sv))
1400 coro_sv = SvRV (coro_sv);
1401
1402 coro = SvSTATE (coro_sv); 1654 coro = SvSTATE (coro_sv);
1403 1655
1404 if (coro->flags & CF_READY) 1656 if (coro->flags & CF_READY)
1405 return 0; 1657 return 0;
1406 1658
1407 coro->flags |= CF_READY; 1659 coro->flags |= CF_READY;
1408 1660
1409 LOCK;
1410
1411 sv_hook = coro_nready ? 0 : coro_readyhook; 1661 sv_hook = coro_nready ? 0 : coro_readyhook;
1412 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1662 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1413 1663
1414 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1664 coro_enq (aTHX_ coro);
1415 ++coro_nready; 1665 ++coro_nready;
1416 1666
1417 UNLOCK;
1418
1419 if (sv_hook) 1667 if (sv_hook)
1420 { 1668 {
1421 dSP; 1669 dSP;
1422 1670
1423 ENTER; 1671 ENTER;
1424 SAVETMPS; 1672 SAVETMPS;
1425 1673
1426 PUSHMARK (SP); 1674 PUSHMARK (SP);
1427 PUTBACK; 1675 PUTBACK;
1428 call_sv (sv_hook, G_DISCARD); 1676 call_sv (sv_hook, G_VOID | G_DISCARD);
1429 SPAGAIN;
1430 1677
1431 FREETMPS; 1678 FREETMPS;
1432 LEAVE; 1679 LEAVE;
1433 } 1680 }
1434 1681
… …
1437 1684
1438 return 1; 1685 return 1;
1439} 1686}
1440 1687
1441static int 1688static int
1442api_is_ready (SV *coro_sv) 1689api_is_ready (pTHX_ SV *coro_sv)
1443{ 1690{
1444 dTHX;
1445 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1691 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1446} 1692}
1447 1693
1448static void 1694/* expects to own a reference to next->hv */
1695INLINE void
1449prepare_schedule (pTHX_ struct transfer_args *ta) 1696prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1450{ 1697{
1451 SV *prev_sv, *next_sv;
1452
1453 for (;;)
1454 {
1455 LOCK;
1456 next_sv = coro_deq (aTHX);
1457
1458 /* nothing to schedule: call the idle handler */
1459 if (expect_false (!next_sv))
1460 {
1461 dSP;
1462 UNLOCK;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 continue;
1475 }
1476
1477 ta->next = SvSTATE (next_sv);
1478
1479 /* cannot transfer to destroyed coros, skip and look for next */
1480 if (expect_false (ta->next->flags & CF_DESTROYED))
1481 {
1482 UNLOCK;
1483 SvREFCNT_dec (next_sv);
1484 /* coro_nready is already taken care of by destroy */
1485 continue;
1486 }
1487
1488 --coro_nready;
1489 UNLOCK;
1490 break;
1491 }
1492
1493 /* free this only after the transfer */
1494 prev_sv = SvRV (coro_current); 1698 SV *prev_sv = SvRV (coro_current);
1699
1495 ta->prev = SvSTATE (prev_sv); 1700 ta->prev = SvSTATE_hv (prev_sv);
1701 ta->next = next;
1702
1496 TRANSFER_CHECK (*ta); 1703 TRANSFER_CHECK (*ta);
1497 assert (ta->next->flags & CF_READY); 1704
1498 ta->next->flags &= ~CF_READY;
1499 SvRV_set (coro_current, next_sv); 1705 SvRV_set (coro_current, (SV *)next->hv);
1500 1706
1501 LOCK;
1502 free_coro_mortal (aTHX); 1707 free_coro_mortal (aTHX);
1503 coro_mortal = prev_sv; 1708 coro_mortal = prev_sv;
1504 UNLOCK;
1505} 1709}
1506 1710
1507static void 1711static void
1712prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1713{
1714 for (;;)
1715 {
1716 struct coro *next = coro_deq (aTHX);
1717
1718 if (expect_true (next))
1719 {
1720 /* cannot transfer to destroyed coros, skip and look for next */
1721 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1722 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1723 else
1724 {
1725 next->flags &= ~CF_READY;
1726 --coro_nready;
1727
1728 prepare_schedule_to (aTHX_ ta, next);
1729 break;
1730 }
1731 }
1732 else
1733 {
1734 /* nothing to schedule: call the idle handler */
1735 if (SvROK (sv_idle)
1736 && SvOBJECT (SvRV (sv_idle)))
1737 {
1738 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1739 api_ready (aTHX_ SvRV (sv_idle));
1740 --coro_nready;
1741 }
1742 else
1743 {
1744 dSP;
1745
1746 ENTER;
1747 SAVETMPS;
1748
1749 PUSHMARK (SP);
1750 PUTBACK;
1751 call_sv (sv_idle, G_VOID | G_DISCARD);
1752
1753 FREETMPS;
1754 LEAVE;
1755 }
1756 }
1757 }
1758}
1759
1760INLINE void
1508prepare_cede (pTHX_ struct transfer_args *ta) 1761prepare_cede (pTHX_ struct coro_transfer_args *ta)
1509{ 1762{
1510 api_ready (coro_current); 1763 api_ready (aTHX_ coro_current);
1511 prepare_schedule (aTHX_ ta); 1764 prepare_schedule (aTHX_ ta);
1512} 1765}
1513 1766
1767INLINE void
1768prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1769{
1770 SV *prev = SvRV (coro_current);
1771
1772 if (coro_nready)
1773 {
1774 prepare_schedule (aTHX_ ta);
1775 api_ready (aTHX_ prev);
1776 }
1777 else
1778 prepare_nop (aTHX_ ta);
1779}
1780
1781static void
1782api_schedule (pTHX)
1783{
1784 struct coro_transfer_args ta;
1785
1786 prepare_schedule (aTHX_ &ta);
1787 TRANSFER (ta, 1);
1788}
1789
1790static void
1791api_schedule_to (pTHX_ SV *coro_sv)
1792{
1793 struct coro_transfer_args ta;
1794 struct coro *next = SvSTATE (coro_sv);
1795
1796 SvREFCNT_inc_NN (coro_sv);
1797 prepare_schedule_to (aTHX_ &ta, next);
1798}
1799
1514static int 1800static int
1515prepare_cede_notself (pTHX_ struct transfer_args *ta) 1801api_cede (pTHX)
1516{ 1802{
1517 if (coro_nready) 1803 struct coro_transfer_args ta;
1518 { 1804
1519 SV *prev = SvRV (coro_current);
1520 prepare_schedule (aTHX_ ta); 1805 prepare_cede (aTHX_ &ta);
1521 api_ready (prev); 1806
1807 if (expect_true (ta.prev != ta.next))
1808 {
1809 TRANSFER (ta, 1);
1522 return 1; 1810 return 1;
1523 } 1811 }
1524 else 1812 else
1525 return 0; 1813 return 0;
1526} 1814}
1527 1815
1528static void
1529api_schedule (void)
1530{
1531 dTHX;
1532 struct transfer_args ta;
1533
1534 prepare_schedule (aTHX_ &ta);
1535 TRANSFER (ta, 1);
1536}
1537
1538static int 1816static int
1539api_cede (void) 1817api_cede_notself (pTHX)
1540{ 1818{
1541 dTHX; 1819 if (coro_nready)
1820 {
1542 struct transfer_args ta; 1821 struct coro_transfer_args ta;
1543 1822
1544 prepare_cede (aTHX_ &ta); 1823 prepare_cede_notself (aTHX_ &ta);
1545
1546 if (expect_true (ta.prev != ta.next))
1547 {
1548 TRANSFER (ta, 1); 1824 TRANSFER (ta, 1);
1549 return 1; 1825 return 1;
1550 } 1826 }
1551 else 1827 else
1552 return 0; 1828 return 0;
1553} 1829}
1554 1830
1555static int 1831static void
1556api_cede_notself (void)
1557{
1558 dTHX;
1559 struct transfer_args ta;
1560
1561 if (prepare_cede_notself (aTHX_ &ta))
1562 {
1563 TRANSFER (ta, 1);
1564 return 1;
1565 }
1566 else
1567 return 0;
1568}
1569
1570static void
1571api_trace (SV *coro_sv, int flags) 1832api_trace (pTHX_ SV *coro_sv, int flags)
1572{ 1833{
1573 dTHX;
1574 struct coro *coro = SvSTATE (coro_sv); 1834 struct coro *coro = SvSTATE (coro_sv);
1575 1835
1836 if (coro->flags & CF_RUNNING)
1837 croak ("cannot enable tracing on a running coroutine, caught");
1838
1576 if (flags & CC_TRACE) 1839 if (flags & CC_TRACE)
1577 { 1840 {
1578 if (!coro->cctx) 1841 if (!coro->cctx)
1579 coro->cctx = cctx_new (); 1842 coro->cctx = cctx_new_run ();
1580 else if (!(coro->cctx->flags & CC_TRACE)) 1843 else if (!(coro->cctx->flags & CC_TRACE))
1581 croak ("cannot enable tracing on coroutine with custom stack"); 1844 croak ("cannot enable tracing on coroutine with custom stack, caught");
1582 1845
1583 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1846 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1584 } 1847 }
1585 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1848 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1586 { 1849 {
… …
1591 else 1854 else
1592 coro->slot->runops = RUNOPS_DEFAULT; 1855 coro->slot->runops = RUNOPS_DEFAULT;
1593 } 1856 }
1594} 1857}
1595 1858
1859static void
1860coro_call_on_destroy (pTHX_ struct coro *coro)
1861{
1862 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1863 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1864
1865 if (on_destroyp)
1866 {
1867 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1868
1869 while (AvFILLp (on_destroy) >= 0)
1870 {
1871 dSP; /* don't disturb outer sp */
1872 SV *cb = av_pop (on_destroy);
1873
1874 PUSHMARK (SP);
1875
1876 if (statusp)
1877 {
1878 int i;
1879 AV *status = (AV *)SvRV (*statusp);
1880 EXTEND (SP, AvFILLp (status) + 1);
1881
1882 for (i = 0; i <= AvFILLp (status); ++i)
1883 PUSHs (AvARRAY (status)[i]);
1884 }
1885
1886 PUTBACK;
1887 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1888 }
1889 }
1890}
1891
1892static void
1893slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1894{
1895 int i;
1896 HV *hv = (HV *)SvRV (coro_current);
1897 AV *av = newAV ();
1898
1899 av_extend (av, items - 1);
1900 for (i = 0; i < items; ++i)
1901 av_push (av, SvREFCNT_inc_NN (arg [i]));
1902
1903 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1904
1905 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1906 api_ready (aTHX_ sv_manager);
1907
1908 frame->prepare = prepare_schedule;
1909 frame->check = slf_check_repeat;
1910
1911 /* as a minor optimisation, we could unwind all stacks here */
1912 /* but that puts extra pressure on pp_slf, and is not worth much */
1913 /*coro_unwind_stacks (aTHX);*/
1914}
1915
1916/*****************************************************************************/
1917/* async pool handler */
1918
1919static int
1920slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1921{
1922 HV *hv = (HV *)SvRV (coro_current);
1923 struct coro *coro = (struct coro *)frame->data;
1924
1925 if (!coro->invoke_cb)
1926 return 1; /* loop till we have invoke */
1927 else
1928 {
1929 hv_store (hv, "desc", sizeof ("desc") - 1,
1930 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1931
1932 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1933
1934 {
1935 dSP;
1936 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1937 PUTBACK;
1938 }
1939
1940 SvREFCNT_dec (GvAV (PL_defgv));
1941 GvAV (PL_defgv) = coro->invoke_av;
1942 coro->invoke_av = 0;
1943
1944 return 0;
1945 }
1946}
1947
1948static void
1949slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1950{
1951 HV *hv = (HV *)SvRV (coro_current);
1952 struct coro *coro = SvSTATE_hv ((SV *)hv);
1953
1954 if (expect_true (coro->saved_deffh))
1955 {
1956 /* subsequent iteration */
1957 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1958 coro->saved_deffh = 0;
1959
1960 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1961 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1962 {
1963 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1964 coro->invoke_av = newAV ();
1965
1966 frame->prepare = prepare_nop;
1967 }
1968 else
1969 {
1970 av_clear (GvAV (PL_defgv));
1971 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1972
1973 coro->prio = 0;
1974
1975 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1976 api_trace (aTHX_ coro_current, 0);
1977
1978 frame->prepare = prepare_schedule;
1979 av_push (av_async_pool, SvREFCNT_inc (hv));
1980 }
1981 }
1982 else
1983 {
1984 /* first iteration, simply fall through */
1985 frame->prepare = prepare_nop;
1986 }
1987
1988 frame->check = slf_check_pool_handler;
1989 frame->data = (void *)coro;
1990}
1991
1992/*****************************************************************************/
1993/* rouse callback */
1994
1995#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1996
1997static void
1998coro_rouse_callback (pTHX_ CV *cv)
1999{
2000 dXSARGS;
2001 SV *data = (SV *)GENSUB_ARG;
2002
2003 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2004 {
2005 /* first call, set args */
2006 SV *coro = SvRV (data);
2007 AV *av = newAV ();
2008
2009 SvRV_set (data, (SV *)av);
2010
2011 /* better take a full copy of the arguments */
2012 while (items--)
2013 av_store (av, items, newSVsv (ST (items)));
2014
2015 api_ready (aTHX_ coro);
2016 SvREFCNT_dec (coro);
2017 }
2018
2019 XSRETURN_EMPTY;
2020}
2021
2022static int
2023slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2024{
2025 SV *data = (SV *)frame->data;
2026
2027 if (CORO_THROW)
2028 return 0;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 return 1;
2032
2033 /* now push all results on the stack */
2034 {
2035 dSP;
2036 AV *av = (AV *)SvRV (data);
2037 int i;
2038
2039 EXTEND (SP, AvFILLp (av) + 1);
2040 for (i = 0; i <= AvFILLp (av); ++i)
2041 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2042
2043 /* we have stolen the elements, so set length to zero and free */
2044 AvFILLp (av) = -1;
2045 av_undef (av);
2046
2047 PUTBACK;
2048 }
2049
2050 return 0;
2051}
2052
2053static void
2054slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2055{
2056 SV *cb;
2057
2058 if (items)
2059 cb = arg [0];
2060 else
2061 {
2062 struct coro *coro = SvSTATE_current;
2063
2064 if (!coro->rouse_cb)
2065 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2066
2067 cb = sv_2mortal (coro->rouse_cb);
2068 coro->rouse_cb = 0;
2069 }
2070
2071 if (!SvROK (cb)
2072 || SvTYPE (SvRV (cb)) != SVt_PVCV
2073 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2074 croak ("Coro::rouse_wait called with illegal callback argument,");
2075
2076 {
2077 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2078 SV *data = (SV *)GENSUB_ARG;
2079
2080 frame->data = (void *)data;
2081 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2082 frame->check = slf_check_rouse_wait;
2083 }
2084}
2085
2086static SV *
2087coro_new_rouse_cb (pTHX)
2088{
2089 HV *hv = (HV *)SvRV (coro_current);
2090 struct coro *coro = SvSTATE_hv (hv);
2091 SV *data = newRV_inc ((SV *)hv);
2092 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2093
2094 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2095 SvREFCNT_dec (data); /* magicext increases the refcount */
2096
2097 SvREFCNT_dec (coro->rouse_cb);
2098 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2099
2100 return cb;
2101}
2102
2103/*****************************************************************************/
2104/* schedule-like-function opcode (SLF) */
2105
2106static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2107static const CV *slf_cv;
2108static SV **slf_argv;
2109static int slf_argc, slf_arga; /* count, allocated */
2110static I32 slf_ax; /* top of stack, for restore */
2111
2112/* this restores the stack in the case we patched the entersub, to */
2113/* recreate the stack frame as perl will on following calls */
2114/* since entersub cleared the stack */
2115static OP *
2116pp_restore (pTHX)
2117{
2118 int i;
2119 SV **SP = PL_stack_base + slf_ax;
2120
2121 PUSHMARK (SP);
2122
2123 EXTEND (SP, slf_argc + 1);
2124
2125 for (i = 0; i < slf_argc; ++i)
2126 PUSHs (sv_2mortal (slf_argv [i]));
2127
2128 PUSHs ((SV *)CvGV (slf_cv));
2129
2130 RETURNOP (slf_restore.op_first);
2131}
2132
2133static void
2134slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2135{
2136 SV **arg = (SV **)slf_frame.data;
2137
2138 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2139}
2140
2141static void
2142slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2143{
2144 if (items != 2)
2145 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2146
2147 frame->prepare = slf_prepare_transfer;
2148 frame->check = slf_check_nop;
2149 frame->data = (void *)arg; /* let's hope it will stay valid */
2150}
2151
2152static void
2153slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2154{
2155 frame->prepare = prepare_schedule;
2156 frame->check = slf_check_nop;
2157}
2158
2159static void
2160slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2161{
2162 struct coro *next = (struct coro *)slf_frame.data;
2163
2164 SvREFCNT_inc_NN (next->hv);
2165 prepare_schedule_to (aTHX_ ta, next);
2166}
2167
2168static void
2169slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (!items)
2172 croak ("Coro::schedule_to expects a coroutine argument, caught");
2173
2174 frame->data = (void *)SvSTATE (arg [0]);
2175 frame->prepare = slf_prepare_schedule_to;
2176 frame->check = slf_check_nop;
2177}
2178
2179static void
2180slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 api_ready (aTHX_ SvRV (coro_current));
2183
2184 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2185}
2186
2187static void
2188slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2189{
2190 frame->prepare = prepare_cede;
2191 frame->check = slf_check_nop;
2192}
2193
2194static void
2195slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 frame->prepare = prepare_cede_notself;
2198 frame->check = slf_check_nop;
2199}
2200
2201/*
2202 * these not obviously related functions are all rolled into one
2203 * function to increase chances that they all will call transfer with the same
2204 * stack offset
2205 * SLF stands for "schedule-like-function".
2206 */
2207static OP *
2208pp_slf (pTHX)
2209{
2210 I32 checkmark; /* mark SP to see how many elements check has pushed */
2211
2212 /* set up the slf frame, unless it has already been set-up */
2213 /* the latter happens when a new coro has been started */
2214 /* or when a new cctx was attached to an existing coroutine */
2215 if (expect_true (!slf_frame.prepare))
2216 {
2217 /* first iteration */
2218 dSP;
2219 SV **arg = PL_stack_base + TOPMARK + 1;
2220 int items = SP - arg; /* args without function object */
2221 SV *gv = *sp;
2222
2223 /* do a quick consistency check on the "function" object, and if it isn't */
2224 /* for us, divert to the real entersub */
2225 if (SvTYPE (gv) != SVt_PVGV
2226 || !GvCV (gv)
2227 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2228 return PL_ppaddr[OP_ENTERSUB](aTHX);
2229
2230 if (!(PL_op->op_flags & OPf_STACKED))
2231 {
2232 /* ampersand-form of call, use @_ instead of stack */
2233 AV *av = GvAV (PL_defgv);
2234 arg = AvARRAY (av);
2235 items = AvFILLp (av) + 1;
2236 }
2237
2238 /* now call the init function, which needs to set up slf_frame */
2239 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2240 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2241
2242 /* pop args */
2243 SP = PL_stack_base + POPMARK;
2244
2245 PUTBACK;
2246 }
2247
2248 /* now that we have a slf_frame, interpret it! */
2249 /* we use a callback system not to make the code needlessly */
2250 /* complicated, but so we can run multiple perl coros from one cctx */
2251
2252 do
2253 {
2254 struct coro_transfer_args ta;
2255
2256 slf_frame.prepare (aTHX_ &ta);
2257 TRANSFER (ta, 0);
2258
2259 checkmark = PL_stack_sp - PL_stack_base;
2260 }
2261 while (slf_frame.check (aTHX_ &slf_frame));
2262
2263 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2264
2265 /* exception handling */
2266 if (expect_false (CORO_THROW))
2267 {
2268 SV *exception = sv_2mortal (CORO_THROW);
2269
2270 CORO_THROW = 0;
2271 sv_setsv (ERRSV, exception);
2272 croak (0);
2273 }
2274
2275 /* return value handling - mostly like entersub */
2276 /* make sure we put something on the stack in scalar context */
2277 if (GIMME_V == G_SCALAR)
2278 {
2279 dSP;
2280 SV **bot = PL_stack_base + checkmark;
2281
2282 if (sp == bot) /* too few, push undef */
2283 bot [1] = &PL_sv_undef;
2284 else if (sp != bot + 1) /* too many, take last one */
2285 bot [1] = *sp;
2286
2287 SP = bot + 1;
2288
2289 PUTBACK;
2290 }
2291
2292 return NORMAL;
2293}
2294
2295static void
2296api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2297{
2298 int i;
2299 SV **arg = PL_stack_base + ax;
2300 int items = PL_stack_sp - arg + 1;
2301
2302 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2303
2304 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2305 && PL_op->op_ppaddr != pp_slf)
2306 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2307
2308 CvFLAGS (cv) |= CVf_SLF;
2309 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2310 slf_cv = cv;
2311
2312 /* we patch the op, and then re-run the whole call */
2313 /* we have to put the same argument on the stack for this to work */
2314 /* and this will be done by pp_restore */
2315 slf_restore.op_next = (OP *)&slf_restore;
2316 slf_restore.op_type = OP_CUSTOM;
2317 slf_restore.op_ppaddr = pp_restore;
2318 slf_restore.op_first = PL_op;
2319
2320 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2321
2322 if (PL_op->op_flags & OPf_STACKED)
2323 {
2324 if (items > slf_arga)
2325 {
2326 slf_arga = items;
2327 free (slf_argv);
2328 slf_argv = malloc (slf_arga * sizeof (SV *));
2329 }
2330
2331 slf_argc = items;
2332
2333 for (i = 0; i < items; ++i)
2334 slf_argv [i] = SvREFCNT_inc (arg [i]);
2335 }
2336 else
2337 slf_argc = 0;
2338
2339 PL_op->op_ppaddr = pp_slf;
2340 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2341
2342 PL_op = (OP *)&slf_restore;
2343}
2344
2345/*****************************************************************************/
2346/* dynamic wind */
2347
2348static void
2349on_enterleave_call (pTHX_ SV *cb)
2350{
2351 dSP;
2352
2353 PUSHSTACK;
2354
2355 PUSHMARK (SP);
2356 PUTBACK;
2357 call_sv (cb, G_VOID | G_DISCARD);
2358 SPAGAIN;
2359
2360 POPSTACK;
2361}
2362
2363static SV *
2364coro_avp_pop_and_free (pTHX_ AV **avp)
2365{
2366 AV *av = *avp;
2367 SV *res = av_pop (av);
2368
2369 if (AvFILLp (av) < 0)
2370 {
2371 *avp = 0;
2372 SvREFCNT_dec (av);
2373 }
2374
2375 return res;
2376}
2377
2378static void
2379coro_pop_on_enter (pTHX_ void *coro)
2380{
2381 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2382 SvREFCNT_dec (cb);
2383}
2384
2385static void
2386coro_pop_on_leave (pTHX_ void *coro)
2387{
2388 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2389 on_enterleave_call (aTHX_ sv_2mortal (cb));
2390}
2391
2392/*****************************************************************************/
2393/* PerlIO::cede */
2394
2395typedef struct
2396{
2397 PerlIOBuf base;
2398 NV next, every;
2399} PerlIOCede;
2400
2401static IV
2402PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2403{
2404 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2405
2406 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2407 self->next = nvtime () + self->every;
2408
2409 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2410}
2411
2412static SV *
2413PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2414{
2415 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2416
2417 return newSVnv (self->every);
2418}
2419
2420static IV
2421PerlIOCede_flush (pTHX_ PerlIO *f)
2422{
2423 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2424 double now = nvtime ();
2425
2426 if (now >= self->next)
2427 {
2428 api_cede (aTHX);
2429 self->next = now + self->every;
2430 }
2431
2432 return PerlIOBuf_flush (aTHX_ f);
2433}
2434
2435static PerlIO_funcs PerlIO_cede =
2436{
2437 sizeof(PerlIO_funcs),
2438 "cede",
2439 sizeof(PerlIOCede),
2440 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2441 PerlIOCede_pushed,
2442 PerlIOBuf_popped,
2443 PerlIOBuf_open,
2444 PerlIOBase_binmode,
2445 PerlIOCede_getarg,
2446 PerlIOBase_fileno,
2447 PerlIOBuf_dup,
2448 PerlIOBuf_read,
2449 PerlIOBuf_unread,
2450 PerlIOBuf_write,
2451 PerlIOBuf_seek,
2452 PerlIOBuf_tell,
2453 PerlIOBuf_close,
2454 PerlIOCede_flush,
2455 PerlIOBuf_fill,
2456 PerlIOBase_eof,
2457 PerlIOBase_error,
2458 PerlIOBase_clearerr,
2459 PerlIOBase_setlinebuf,
2460 PerlIOBuf_get_base,
2461 PerlIOBuf_bufsiz,
2462 PerlIOBuf_get_ptr,
2463 PerlIOBuf_get_cnt,
2464 PerlIOBuf_set_ptrcnt,
2465};
2466
2467/*****************************************************************************/
2468/* Coro::Semaphore & Coro::Signal */
2469
2470static SV *
2471coro_waitarray_new (pTHX_ int count)
2472{
2473 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2474 AV *av = newAV ();
2475 SV **ary;
2476
2477 /* unfortunately, building manually saves memory */
2478 Newx (ary, 2, SV *);
2479 AvALLOC (av) = ary;
2480#if PERL_VERSION_ATLEAST (5,10,0)
2481 AvARRAY (av) = ary;
2482#else
2483 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2484 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2485 SvPVX ((SV *)av) = (char *)ary;
2486#endif
2487 AvMAX (av) = 1;
2488 AvFILLp (av) = 0;
2489 ary [0] = newSViv (count);
2490
2491 return newRV_noinc ((SV *)av);
2492}
2493
2494/* semaphore */
2495
2496static void
2497coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2498{
2499 SV *count_sv = AvARRAY (av)[0];
2500 IV count = SvIVX (count_sv);
2501
2502 count += adjust;
2503 SvIVX (count_sv) = count;
2504
2505 /* now wake up as many waiters as are expected to lock */
2506 while (count > 0 && AvFILLp (av) > 0)
2507 {
2508 SV *cb;
2509
2510 /* swap first two elements so we can shift a waiter */
2511 AvARRAY (av)[0] = AvARRAY (av)[1];
2512 AvARRAY (av)[1] = count_sv;
2513 cb = av_shift (av);
2514
2515 if (SvOBJECT (cb))
2516 {
2517 api_ready (aTHX_ cb);
2518 --count;
2519 }
2520 else if (SvTYPE (cb) == SVt_PVCV)
2521 {
2522 dSP;
2523 PUSHMARK (SP);
2524 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2525 PUTBACK;
2526 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2527 }
2528
2529 SvREFCNT_dec (cb);
2530 }
2531}
2532
2533static void
2534coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2535{
2536 /* call $sem->adjust (0) to possibly wake up some other waiters */
2537 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2538}
2539
2540static int
2541slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2542{
2543 AV *av = (AV *)frame->data;
2544 SV *count_sv = AvARRAY (av)[0];
2545
2546 /* if we are about to throw, don't actually acquire the lock, just throw */
2547 if (CORO_THROW)
2548 return 0;
2549 else if (SvIVX (count_sv) > 0)
2550 {
2551 SvSTATE_current->on_destroy = 0;
2552
2553 if (acquire)
2554 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2555 else
2556 coro_semaphore_adjust (aTHX_ av, 0);
2557
2558 return 0;
2559 }
2560 else
2561 {
2562 int i;
2563 /* if we were woken up but can't down, we look through the whole */
2564 /* waiters list and only add us if we aren't in there already */
2565 /* this avoids some degenerate memory usage cases */
2566
2567 for (i = 1; i <= AvFILLp (av); ++i)
2568 if (AvARRAY (av)[i] == SvRV (coro_current))
2569 return 1;
2570
2571 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2572 return 1;
2573 }
2574}
2575
2576static int
2577slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2578{
2579 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2580}
2581
2582static int
2583slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2584{
2585 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2586}
2587
2588static void
2589slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2590{
2591 AV *av = (AV *)SvRV (arg [0]);
2592
2593 if (SvIVX (AvARRAY (av)[0]) > 0)
2594 {
2595 frame->data = (void *)av;
2596 frame->prepare = prepare_nop;
2597 }
2598 else
2599 {
2600 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2601
2602 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2603 frame->prepare = prepare_schedule;
2604
2605 /* to avoid race conditions when a woken-up coro gets terminated */
2606 /* we arrange for a temporary on_destroy that calls adjust (0) */
2607 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2608 }
2609}
2610
2611static void
2612slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2615 frame->check = slf_check_semaphore_down;
2616}
2617
2618static void
2619slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2620{
2621 if (items >= 2)
2622 {
2623 /* callback form */
2624 AV *av = (AV *)SvRV (arg [0]);
2625 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2626
2627 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2628
2629 if (SvIVX (AvARRAY (av)[0]) > 0)
2630 coro_semaphore_adjust (aTHX_ av, 0);
2631
2632 frame->prepare = prepare_nop;
2633 frame->check = slf_check_nop;
2634 }
2635 else
2636 {
2637 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2638 frame->check = slf_check_semaphore_wait;
2639 }
2640}
2641
2642/* signal */
2643
2644static void
2645coro_signal_wake (pTHX_ AV *av, int count)
2646{
2647 SvIVX (AvARRAY (av)[0]) = 0;
2648
2649 /* now signal count waiters */
2650 while (count > 0 && AvFILLp (av) > 0)
2651 {
2652 SV *cb;
2653
2654 /* swap first two elements so we can shift a waiter */
2655 cb = AvARRAY (av)[0];
2656 AvARRAY (av)[0] = AvARRAY (av)[1];
2657 AvARRAY (av)[1] = cb;
2658
2659 cb = av_shift (av);
2660
2661 api_ready (aTHX_ cb);
2662 sv_setiv (cb, 0); /* signal waiter */
2663 SvREFCNT_dec (cb);
2664
2665 --count;
2666 }
2667}
2668
2669static int
2670slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2671{
2672 /* if we are about to throw, also stop waiting */
2673 return SvROK ((SV *)frame->data) && !CORO_THROW;
2674}
2675
2676static void
2677slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2678{
2679 AV *av = (AV *)SvRV (arg [0]);
2680
2681 if (SvIVX (AvARRAY (av)[0]))
2682 {
2683 SvIVX (AvARRAY (av)[0]) = 0;
2684 frame->prepare = prepare_nop;
2685 frame->check = slf_check_nop;
2686 }
2687 else
2688 {
2689 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2690
2691 av_push (av, waiter);
2692
2693 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2694 frame->prepare = prepare_schedule;
2695 frame->check = slf_check_signal_wait;
2696 }
2697}
2698
2699/*****************************************************************************/
2700/* Coro::AIO */
2701
2702#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2703
2704/* helper storage struct */
2705struct io_state
2706{
2707 int errorno;
2708 I32 laststype; /* U16 in 5.10.0 */
2709 int laststatval;
2710 Stat_t statcache;
2711};
2712
2713static void
2714coro_aio_callback (pTHX_ CV *cv)
2715{
2716 dXSARGS;
2717 AV *state = (AV *)GENSUB_ARG;
2718 SV *coro = av_pop (state);
2719 SV *data_sv = newSV (sizeof (struct io_state));
2720
2721 av_extend (state, items - 1);
2722
2723 sv_upgrade (data_sv, SVt_PV);
2724 SvCUR_set (data_sv, sizeof (struct io_state));
2725 SvPOK_only (data_sv);
2726
2727 {
2728 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2729
2730 data->errorno = errno;
2731 data->laststype = PL_laststype;
2732 data->laststatval = PL_laststatval;
2733 data->statcache = PL_statcache;
2734 }
2735
2736 /* now build the result vector out of all the parameters and the data_sv */
2737 {
2738 int i;
2739
2740 for (i = 0; i < items; ++i)
2741 av_push (state, SvREFCNT_inc_NN (ST (i)));
2742 }
2743
2744 av_push (state, data_sv);
2745
2746 api_ready (aTHX_ coro);
2747 SvREFCNT_dec (coro);
2748 SvREFCNT_dec ((AV *)state);
2749}
2750
2751static int
2752slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2753{
2754 AV *state = (AV *)frame->data;
2755
2756 /* if we are about to throw, return early */
2757 /* this does not cancel the aio request, but at least */
2758 /* it quickly returns */
2759 if (CORO_THROW)
2760 return 0;
2761
2762 /* one element that is an RV? repeat! */
2763 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2764 return 1;
2765
2766 /* restore status */
2767 {
2768 SV *data_sv = av_pop (state);
2769 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2770
2771 errno = data->errorno;
2772 PL_laststype = data->laststype;
2773 PL_laststatval = data->laststatval;
2774 PL_statcache = data->statcache;
2775
2776 SvREFCNT_dec (data_sv);
2777 }
2778
2779 /* push result values */
2780 {
2781 dSP;
2782 int i;
2783
2784 EXTEND (SP, AvFILLp (state) + 1);
2785 for (i = 0; i <= AvFILLp (state); ++i)
2786 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2787
2788 PUTBACK;
2789 }
2790
2791 return 0;
2792}
2793
2794static void
2795slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2796{
2797 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2798 SV *coro_hv = SvRV (coro_current);
2799 struct coro *coro = SvSTATE_hv (coro_hv);
2800
2801 /* put our coroutine id on the state arg */
2802 av_push (state, SvREFCNT_inc_NN (coro_hv));
2803
2804 /* first see whether we have a non-zero priority and set it as AIO prio */
2805 if (coro->prio)
2806 {
2807 dSP;
2808
2809 static SV *prio_cv;
2810 static SV *prio_sv;
2811
2812 if (expect_false (!prio_cv))
2813 {
2814 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2815 prio_sv = newSViv (0);
2816 }
2817
2818 PUSHMARK (SP);
2819 sv_setiv (prio_sv, coro->prio);
2820 XPUSHs (prio_sv);
2821
2822 PUTBACK;
2823 call_sv (prio_cv, G_VOID | G_DISCARD);
2824 }
2825
2826 /* now call the original request */
2827 {
2828 dSP;
2829 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2830 int i;
2831
2832 PUSHMARK (SP);
2833
2834 /* first push all args to the stack */
2835 EXTEND (SP, items + 1);
2836
2837 for (i = 0; i < items; ++i)
2838 PUSHs (arg [i]);
2839
2840 /* now push the callback closure */
2841 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2842
2843 /* now call the AIO function - we assume our request is uncancelable */
2844 PUTBACK;
2845 call_sv ((SV *)req, G_VOID | G_DISCARD);
2846 }
2847
2848 /* now that the requets is going, we loop toll we have a result */
2849 frame->data = (void *)state;
2850 frame->prepare = prepare_schedule;
2851 frame->check = slf_check_aio_req;
2852}
2853
2854static void
2855coro_aio_req_xs (pTHX_ CV *cv)
2856{
2857 dXSARGS;
2858
2859 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2860
2861 XSRETURN_EMPTY;
2862}
2863
2864/*****************************************************************************/
2865
2866#if CORO_CLONE
2867# include "clone.c"
2868#endif
2869
1596MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2870MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1597 2871
1598PROTOTYPES: DISABLE 2872PROTOTYPES: DISABLE
1599 2873
1600BOOT: 2874BOOT:
1601{ 2875{
1602#ifdef USE_ITHREADS 2876#ifdef USE_ITHREADS
1603 MUTEX_INIT (&coro_mutex); 2877# if CORO_PTHREAD
2878 coro_thx = PERL_GET_CONTEXT;
2879# endif
1604#endif 2880#endif
1605 BOOT_PAGESIZE; 2881 BOOT_PAGESIZE;
2882
2883 cctx_current = cctx_new_empty ();
1606 2884
1607 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2885 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1608 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2886 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1609 2887
1610 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2888 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1611 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2889 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1612 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2890 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1613 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1614 2891
1615 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2892 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1616 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2893 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1617 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2894 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1618 2895
… …
1627 main_top_env = PL_top_env; 2904 main_top_env = PL_top_env;
1628 2905
1629 while (main_top_env->je_prev) 2906 while (main_top_env->je_prev)
1630 main_top_env = main_top_env->je_prev; 2907 main_top_env = main_top_env->je_prev;
1631 2908
2909 {
2910 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2911
2912 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2913 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2914
2915 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2916 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2917 }
2918
1632 coroapi.ver = CORO_API_VERSION; 2919 coroapi.ver = CORO_API_VERSION;
1633 coroapi.rev = CORO_API_REVISION; 2920 coroapi.rev = CORO_API_REVISION;
2921
1634 coroapi.transfer = api_transfer; 2922 coroapi.transfer = api_transfer;
2923
2924 coroapi.sv_state = SvSTATE_;
2925 coroapi.execute_slf = api_execute_slf;
2926 coroapi.prepare_nop = prepare_nop;
2927 coroapi.prepare_schedule = prepare_schedule;
2928 coroapi.prepare_cede = prepare_cede;
2929 coroapi.prepare_cede_notself = prepare_cede_notself;
2930
2931 {
2932 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2933
2934 if (!svp) croak ("Time::HiRes is required");
2935 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2936
2937 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2938 }
1635 2939
1636 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2940 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1637} 2941}
1638 2942
1639SV * 2943SV *
1640new (char *klass, ...) 2944new (char *klass, ...)
2945 ALIAS:
2946 Coro::new = 1
1641 CODE: 2947 CODE:
1642{ 2948{
1643 struct coro *coro; 2949 struct coro *coro;
1644 MAGIC *mg; 2950 MAGIC *mg;
1645 HV *hv; 2951 HV *hv;
2952 CV *cb;
1646 int i; 2953 int i;
2954
2955 if (items > 1)
2956 {
2957 cb = coro_sv_2cv (aTHX_ ST (1));
2958
2959 if (!ix)
2960 {
2961 if (CvISXSUB (cb))
2962 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2963
2964 if (!CvROOT (cb))
2965 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2966 }
2967 }
1647 2968
1648 Newz (0, coro, 1, struct coro); 2969 Newz (0, coro, 1, struct coro);
1649 coro->args = newAV (); 2970 coro->args = newAV ();
1650 coro->flags = CF_NEW; 2971 coro->flags = CF_NEW;
1651 2972
… …
1656 coro->hv = hv = newHV (); 2977 coro->hv = hv = newHV ();
1657 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2978 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1658 mg->mg_flags |= MGf_DUP; 2979 mg->mg_flags |= MGf_DUP;
1659 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2980 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1660 2981
2982 if (items > 1)
2983 {
1661 av_extend (coro->args, items - 1); 2984 av_extend (coro->args, items - 1 + ix - 1);
2985
2986 if (ix)
2987 {
2988 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2989 cb = cv_coro_run;
2990 }
2991
2992 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2993
1662 for (i = 1; i < items; i++) 2994 for (i = 2; i < items; i++)
1663 av_push (coro->args, newSVsv (ST (i))); 2995 av_push (coro->args, newSVsv (ST (i)));
2996 }
1664} 2997}
1665 OUTPUT: 2998 OUTPUT:
1666 RETVAL 2999 RETVAL
1667 3000
1668# these not obviously related functions are all rolled into the same xs
1669# function to increase chances that they all will call transfer with the same
1670# stack offset
1671void 3001void
1672_set_stacklevel (...) 3002transfer (...)
1673 ALIAS: 3003 PROTOTYPE: $$
1674 Coro::State::transfer = 1 3004 CODE:
1675 Coro::schedule = 2 3005 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1676 Coro::cede = 3
1677 Coro::cede_notself = 4
1678 CODE:
1679{
1680 struct transfer_args ta;
1681
1682 PUTBACK;
1683 switch (ix)
1684 {
1685 case 0:
1686 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1687 ta.next = 0;
1688 break;
1689
1690 case 1:
1691 if (items != 2)
1692 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1693
1694 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1695 break;
1696
1697 case 2:
1698 prepare_schedule (aTHX_ &ta);
1699 break;
1700
1701 case 3:
1702 prepare_cede (aTHX_ &ta);
1703 break;
1704
1705 case 4:
1706 if (!prepare_cede_notself (aTHX_ &ta))
1707 XSRETURN_EMPTY;
1708
1709 break;
1710 }
1711 SPAGAIN;
1712
1713 BARRIER;
1714 PUTBACK;
1715 TRANSFER (ta, 0);
1716 SPAGAIN; /* might be the sp of a different coroutine now */
1717 /* be extra careful not to ever do anything after TRANSFER */
1718}
1719 3006
1720bool 3007bool
1721_destroy (SV *coro_sv) 3008_destroy (SV *coro_sv)
1722 CODE: 3009 CODE:
1723 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3010 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1728_exit (int code) 3015_exit (int code)
1729 PROTOTYPE: $ 3016 PROTOTYPE: $
1730 CODE: 3017 CODE:
1731 _exit (code); 3018 _exit (code);
1732 3019
3020SV *
3021clone (Coro::State coro)
3022 CODE:
3023{
3024#if CORO_CLONE
3025 struct coro *ncoro = coro_clone (aTHX_ coro);
3026 MAGIC *mg;
3027 /* TODO: too much duplication */
3028 ncoro->hv = newHV ();
3029 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3030 mg->mg_flags |= MGf_DUP;
3031 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3032#else
3033 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3034#endif
3035}
3036 OUTPUT:
3037 RETVAL
3038
1733int 3039int
1734cctx_stacksize (int new_stacksize = 0) 3040cctx_stacksize (int new_stacksize = 0)
3041 PROTOTYPE: ;$
1735 CODE: 3042 CODE:
1736 RETVAL = coro_stacksize; 3043 RETVAL = cctx_stacksize;
1737 if (new_stacksize) 3044 if (new_stacksize)
3045 {
1738 coro_stacksize = new_stacksize; 3046 cctx_stacksize = new_stacksize;
3047 ++cctx_gen;
3048 }
1739 OUTPUT: 3049 OUTPUT:
1740 RETVAL 3050 RETVAL
1741 3051
1742int 3052int
3053cctx_max_idle (int max_idle = 0)
3054 PROTOTYPE: ;$
3055 CODE:
3056 RETVAL = cctx_max_idle;
3057 if (max_idle > 1)
3058 cctx_max_idle = max_idle;
3059 OUTPUT:
3060 RETVAL
3061
3062int
1743cctx_count () 3063cctx_count ()
3064 PROTOTYPE:
1744 CODE: 3065 CODE:
1745 RETVAL = cctx_count; 3066 RETVAL = cctx_count;
1746 OUTPUT: 3067 OUTPUT:
1747 RETVAL 3068 RETVAL
1748 3069
1749int 3070int
1750cctx_idle () 3071cctx_idle ()
3072 PROTOTYPE:
1751 CODE: 3073 CODE:
1752 RETVAL = cctx_idle; 3074 RETVAL = cctx_idle;
1753 OUTPUT: 3075 OUTPUT:
1754 RETVAL 3076 RETVAL
1755 3077
1756void 3078void
1757list () 3079list ()
3080 PROTOTYPE:
1758 PPCODE: 3081 PPCODE:
1759{ 3082{
1760 struct coro *coro; 3083 struct coro *coro;
1761 for (coro = coro_first; coro; coro = coro->next) 3084 for (coro = coro_first; coro; coro = coro->next)
1762 if (coro->hv) 3085 if (coro->hv)
… …
1767call (Coro::State coro, SV *coderef) 3090call (Coro::State coro, SV *coderef)
1768 ALIAS: 3091 ALIAS:
1769 eval = 1 3092 eval = 1
1770 CODE: 3093 CODE:
1771{ 3094{
1772 if (coro->mainstack) 3095 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1773 { 3096 {
1774 struct coro temp; 3097 struct coro *current = SvSTATE_current;
1775 3098
1776 if (!(coro->flags & CF_RUNNING)) 3099 if (current != coro)
1777 { 3100 {
1778 PUTBACK; 3101 PUTBACK;
1779 save_perl (aTHX_ &temp); 3102 save_perl (aTHX_ current);
1780 load_perl (aTHX_ coro); 3103 load_perl (aTHX_ coro);
3104 SPAGAIN;
1781 } 3105 }
1782 3106
1783 {
1784 dSP;
1785 ENTER;
1786 SAVETMPS;
1787 PUTBACK;
1788 PUSHSTACK; 3107 PUSHSTACK;
3108
1789 PUSHMARK (SP); 3109 PUSHMARK (SP);
3110 PUTBACK;
1790 3111
1791 if (ix) 3112 if (ix)
1792 eval_sv (coderef, 0); 3113 eval_sv (coderef, 0);
1793 else 3114 else
1794 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3115 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1795 3116
1796 POPSTACK; 3117 POPSTACK;
1797 SPAGAIN; 3118 SPAGAIN;
1798 FREETMPS;
1799 LEAVE;
1800 PUTBACK;
1801 }
1802 3119
1803 if (!(coro->flags & CF_RUNNING)) 3120 if (current != coro)
1804 { 3121 {
3122 PUTBACK;
1805 save_perl (aTHX_ coro); 3123 save_perl (aTHX_ coro);
1806 load_perl (aTHX_ &temp); 3124 load_perl (aTHX_ current);
1807 SPAGAIN; 3125 SPAGAIN;
1808 } 3126 }
1809 } 3127 }
1810} 3128}
1811 3129
… …
1815 ALIAS: 3133 ALIAS:
1816 is_ready = CF_READY 3134 is_ready = CF_READY
1817 is_running = CF_RUNNING 3135 is_running = CF_RUNNING
1818 is_new = CF_NEW 3136 is_new = CF_NEW
1819 is_destroyed = CF_DESTROYED 3137 is_destroyed = CF_DESTROYED
3138 is_suspended = CF_SUSPENDED
1820 CODE: 3139 CODE:
1821 RETVAL = boolSV (coro->flags & ix); 3140 RETVAL = boolSV (coro->flags & ix);
1822 OUTPUT: 3141 OUTPUT:
1823 RETVAL 3142 RETVAL
1824 3143
1825void 3144void
3145throw (Coro::State self, SV *throw = &PL_sv_undef)
3146 PROTOTYPE: $;$
3147 CODE:
3148{
3149 struct coro *current = SvSTATE_current;
3150 SV **throwp = self == current ? &CORO_THROW : &self->except;
3151 SvREFCNT_dec (*throwp);
3152 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3153}
3154
3155void
1826api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3156api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3157 PROTOTYPE: $;$
3158 C_ARGS: aTHX_ coro, flags
1827 3159
1828SV * 3160SV *
1829has_cctx (Coro::State coro) 3161has_cctx (Coro::State coro)
1830 PROTOTYPE: $ 3162 PROTOTYPE: $
1831 CODE: 3163 CODE:
1832 RETVAL = boolSV (!!coro->cctx); 3164 /* maybe manage the running flag differently */
3165 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1833 OUTPUT: 3166 OUTPUT:
1834 RETVAL 3167 RETVAL
1835 3168
1836int 3169int
1837is_traced (Coro::State coro) 3170is_traced (Coro::State coro)
… …
1839 CODE: 3172 CODE:
1840 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3173 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1841 OUTPUT: 3174 OUTPUT:
1842 RETVAL 3175 RETVAL
1843 3176
1844IV 3177UV
1845rss (Coro::State coro) 3178rss (Coro::State coro)
1846 PROTOTYPE: $ 3179 PROTOTYPE: $
1847 ALIAS: 3180 ALIAS:
1848 usecount = 1 3181 usecount = 1
1849 CODE: 3182 CODE:
… …
1855 OUTPUT: 3188 OUTPUT:
1856 RETVAL 3189 RETVAL
1857 3190
1858void 3191void
1859force_cctx () 3192force_cctx ()
3193 PROTOTYPE:
1860 CODE: 3194 CODE:
1861 struct coro *coro = SvSTATE (coro_current);
1862 coro->cctx->idle_sp = 0; 3195 cctx_current->idle_sp = 0;
3196
3197void
3198swap_defsv (Coro::State self)
3199 PROTOTYPE: $
3200 ALIAS:
3201 swap_defav = 1
3202 CODE:
3203 if (!self->slot)
3204 croak ("cannot swap state with coroutine that has no saved state,");
3205 else
3206 {
3207 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3208 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3209
3210 SV *tmp = *src; *src = *dst; *dst = tmp;
3211 }
3212
3213void
3214cancel (Coro::State self)
3215 CODE:
3216 coro_state_destroy (aTHX_ self);
3217 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3218
1863 3219
1864MODULE = Coro::State PACKAGE = Coro 3220MODULE = Coro::State PACKAGE = Coro
1865 3221
1866BOOT: 3222BOOT:
1867{ 3223{
1868 int i; 3224 int i;
1869 3225
1870 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1871 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3226 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1872 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3227 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1873 3228 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3229 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
1874 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3230 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1875 SvREADONLY_on (coro_current); 3231 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3232 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3233 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3234 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3235
3236 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3237 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3238 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3239 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1876 3240
1877 coro_stash = gv_stashpv ("Coro", TRUE); 3241 coro_stash = gv_stashpv ("Coro", TRUE);
1878 3242
1879 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3243 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1880 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3244 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1881 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3245 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1882 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3246 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1883 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3247 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1884 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3248 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1885 3249
1886 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1887 coro_ready[i] = newAV ();
1888
1889 { 3250 {
1890 SV *sv = perl_get_sv ("Coro::API", TRUE); 3251 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1891 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1892 3252
1893 coroapi.schedule = api_schedule; 3253 coroapi.schedule = api_schedule;
3254 coroapi.schedule_to = api_schedule_to;
1894 coroapi.cede = api_cede; 3255 coroapi.cede = api_cede;
1895 coroapi.cede_notself = api_cede_notself; 3256 coroapi.cede_notself = api_cede_notself;
1896 coroapi.ready = api_ready; 3257 coroapi.ready = api_ready;
1897 coroapi.is_ready = api_is_ready; 3258 coroapi.is_ready = api_is_ready;
1898 coroapi.nready = &coro_nready; 3259 coroapi.nready = coro_nready;
1899 coroapi.current = coro_current; 3260 coroapi.current = coro_current;
1900 3261
1901 GCoroAPI = &coroapi; 3262 /*GCoroAPI = &coroapi;*/
1902 sv_setiv (sv, (IV)&coroapi); 3263 sv_setiv (sv, (IV)&coroapi);
1903 SvREADONLY_on (sv); 3264 SvREADONLY_on (sv);
1904 } 3265 }
1905} 3266}
3267
3268void
3269terminate (...)
3270 CODE:
3271 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3272
3273void
3274schedule (...)
3275 CODE:
3276 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3277
3278void
3279schedule_to (...)
3280 CODE:
3281 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3282
3283void
3284cede_to (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3287
3288void
3289cede (...)
3290 CODE:
3291 CORO_EXECUTE_SLF_XS (slf_init_cede);
3292
3293void
3294cede_notself (...)
3295 CODE:
3296 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1906 3297
1907void 3298void
1908_set_current (SV *current) 3299_set_current (SV *current)
1909 PROTOTYPE: $ 3300 PROTOTYPE: $
1910 CODE: 3301 CODE:
1911 SvREFCNT_dec (SvRV (coro_current)); 3302 SvREFCNT_dec (SvRV (coro_current));
1912 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3303 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1913 3304
1914void 3305void
1915_set_readyhook (SV *hook) 3306_set_readyhook (SV *hook)
1916 PROTOTYPE: $ 3307 PROTOTYPE: $
1917 CODE: 3308 CODE:
1918 LOCK;
1919 SvREFCNT_dec (coro_readyhook); 3309 SvREFCNT_dec (coro_readyhook);
1920 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3310 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1921 UNLOCK;
1922 3311
1923int 3312int
1924prio (Coro::State coro, int newprio = 0) 3313prio (Coro::State coro, int newprio = 0)
3314 PROTOTYPE: $;$
1925 ALIAS: 3315 ALIAS:
1926 nice = 1 3316 nice = 1
1927 CODE: 3317 CODE:
1928{ 3318{
1929 RETVAL = coro->prio; 3319 RETVAL = coro->prio;
… …
1944 3334
1945SV * 3335SV *
1946ready (SV *self) 3336ready (SV *self)
1947 PROTOTYPE: $ 3337 PROTOTYPE: $
1948 CODE: 3338 CODE:
1949 RETVAL = boolSV (api_ready (self)); 3339 RETVAL = boolSV (api_ready (aTHX_ self));
1950 OUTPUT: 3340 OUTPUT:
1951 RETVAL 3341 RETVAL
1952 3342
1953int 3343int
1954nready (...) 3344nready (...)
… …
1957 RETVAL = coro_nready; 3347 RETVAL = coro_nready;
1958 OUTPUT: 3348 OUTPUT:
1959 RETVAL 3349 RETVAL
1960 3350
1961void 3351void
1962throw (Coro::State self, SV *throw = &PL_sv_undef) 3352suspend (Coro::State self)
1963 PROTOTYPE: $;$ 3353 PROTOTYPE: $
3354 CODE:
3355 self->flags |= CF_SUSPENDED;
3356
3357void
3358resume (Coro::State self)
3359 PROTOTYPE: $
3360 CODE:
3361 self->flags &= ~CF_SUSPENDED;
3362
3363void
3364_pool_handler (...)
3365 CODE:
3366 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3367
3368void
3369async_pool (SV *cv, ...)
3370 PROTOTYPE: &@
3371 PPCODE:
3372{
3373 HV *hv = (HV *)av_pop (av_async_pool);
3374 AV *av = newAV ();
3375 SV *cb = ST (0);
3376 int i;
3377
3378 av_extend (av, items - 2);
3379 for (i = 1; i < items; ++i)
3380 av_push (av, SvREFCNT_inc_NN (ST (i)));
3381
3382 if ((SV *)hv == &PL_sv_undef)
3383 {
3384 PUSHMARK (SP);
3385 EXTEND (SP, 2);
3386 PUSHs (sv_Coro);
3387 PUSHs ((SV *)cv_pool_handler);
3388 PUTBACK;
3389 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3390 SPAGAIN;
3391
3392 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3393 }
3394
3395 {
3396 struct coro *coro = SvSTATE_hv (hv);
3397
3398 assert (!coro->invoke_cb);
3399 assert (!coro->invoke_av);
3400 coro->invoke_cb = SvREFCNT_inc (cb);
3401 coro->invoke_av = av;
3402 }
3403
3404 api_ready (aTHX_ (SV *)hv);
3405
3406 if (GIMME_V != G_VOID)
3407 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3408 else
3409 SvREFCNT_dec (hv);
3410}
3411
3412SV *
3413rouse_cb ()
3414 PROTOTYPE:
3415 CODE:
3416 RETVAL = coro_new_rouse_cb (aTHX);
3417 OUTPUT:
3418 RETVAL
3419
3420void
3421rouse_wait (...)
3422 PROTOTYPE: ;$
3423 PPCODE:
3424 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3425
3426void
3427on_enter (SV *block)
3428 ALIAS:
3429 on_leave = 1
3430 PROTOTYPE: &
3431 CODE:
3432{
3433 struct coro *coro = SvSTATE_current;
3434 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3435
3436 block = (SV *)coro_sv_2cv (aTHX_ block);
3437
3438 if (!*avp)
3439 *avp = newAV ();
3440
3441 av_push (*avp, SvREFCNT_inc (block));
3442
3443 if (!ix)
3444 on_enterleave_call (aTHX_ block);
3445
3446 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3447 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3448 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = PerlIO::cede
3453
3454BOOT:
3455 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::Semaphore
3459
3460SV *
3461new (SV *klass, SV *count = 0)
3462 CODE:
3463 RETVAL = sv_bless (
3464 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3465 GvSTASH (CvGV (cv))
3466 );
3467 OUTPUT:
3468 RETVAL
3469
3470# helper for Coro::Channel and others
3471SV *
3472_alloc (int count)
3473 CODE:
3474 RETVAL = coro_waitarray_new (aTHX_ count);
3475 OUTPUT:
3476 RETVAL
3477
3478SV *
3479count (SV *self)
3480 CODE:
3481 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3482 OUTPUT:
3483 RETVAL
3484
3485void
3486up (SV *self, int adjust = 1)
3487 ALIAS:
3488 adjust = 1
1964 CODE: 3489 CODE:
1965 SvREFCNT_dec (self->throw); 3490 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1966 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1967 3491
1968void 3492void
1969swap_defsv (Coro::State self) 3493down (...)
1970 PROTOTYPE: $
1971 ALIAS:
1972 swap_defav = 1
1973 CODE: 3494 CODE:
1974 if (!self->slot) 3495 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1975 croak ("cannot swap state with coroutine that has no saved state"); 3496
3497void
3498wait (...)
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3501
3502void
3503try (SV *self)
3504 PPCODE:
3505{
3506 AV *av = (AV *)SvRV (self);
3507 SV *count_sv = AvARRAY (av)[0];
3508 IV count = SvIVX (count_sv);
3509
3510 if (count > 0)
3511 {
3512 --count;
3513 SvIVX (count_sv) = count;
3514 XSRETURN_YES;
3515 }
3516 else
3517 XSRETURN_NO;
3518}
3519
3520void
3521waiters (SV *self)
3522 PPCODE:
3523{
3524 AV *av = (AV *)SvRV (self);
3525 int wcount = AvFILLp (av) + 1 - 1;
3526
3527 if (GIMME_V == G_SCALAR)
3528 XPUSHs (sv_2mortal (newSViv (wcount)));
1976 else 3529 else
1977 { 3530 {
1978 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3531 int i;
1979 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3532 EXTEND (SP, wcount);
1980 3533 for (i = 1; i <= wcount; ++i)
1981 SV *tmp = *src; *src = *dst; *dst = tmp; 3534 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1982 } 3535 }
3536}
1983 3537
1984# for async_pool speedup 3538MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3539
1985void 3540void
1986_pool_1 (SV *cb) 3541_may_delete (SV *sem, int count, int extra_refs)
3542 PPCODE:
3543{
3544 AV *av = (AV *)SvRV (sem);
3545
3546 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3547 && AvFILLp (av) == 0 /* no waiters, just count */
3548 && SvIV (AvARRAY (av)[0]) == count)
3549 XSRETURN_YES;
3550
3551 XSRETURN_NO;
3552}
3553
3554MODULE = Coro::State PACKAGE = Coro::Signal
3555
3556SV *
3557new (SV *klass)
1987 CODE: 3558 CODE:
1988{ 3559 RETVAL = sv_bless (
1989 struct coro *coro = SvSTATE (coro_current); 3560 coro_waitarray_new (aTHX_ 0),
1990 HV *hv = (HV *)SvRV (coro_current); 3561 GvSTASH (CvGV (cv))
1991 AV *defav = GvAV (PL_defgv); 3562 );
1992 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 3563 OUTPUT:
1993 AV *invoke_av; 3564 RETVAL
1994 int i, len;
1995
1996 if (!invoke)
1997 {
1998 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1999 croak ("\3async_pool terminate\2\n");
2000 }
2001
2002 SvREFCNT_dec (coro->saved_deffh);
2003 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2004
2005 hv_store (hv, "desc", sizeof ("desc") - 1,
2006 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2007
2008 invoke_av = (AV *)SvRV (invoke);
2009 len = av_len (invoke_av);
2010
2011 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2012
2013 if (len > 0)
2014 {
2015 av_fill (defav, len - 1);
2016 for (i = 0; i < len; ++i)
2017 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2018 }
2019
2020 SvREFCNT_dec (invoke);
2021}
2022 3565
2023void 3566void
2024_pool_2 (SV *cb) 3567wait (...)
3568 CODE:
3569 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3570
3571void
3572broadcast (SV *self)
3573 CODE:
3574{
3575 AV *av = (AV *)SvRV (self);
3576 coro_signal_wake (aTHX_ av, AvFILLp (av));
3577}
3578
3579void
3580send (SV *self)
3581 CODE:
3582{
3583 AV *av = (AV *)SvRV (self);
3584
3585 if (AvFILLp (av))
3586 coro_signal_wake (aTHX_ av, 1);
3587 else
3588 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3589}
3590
3591IV
3592awaited (SV *self)
2025 CODE: 3593 CODE:
2026{ 3594 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
2027 struct coro *coro = SvSTATE (coro_current);
2028
2029 sv_setsv (cb, &PL_sv_undef);
2030
2031 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2032 coro->saved_deffh = 0;
2033
2034 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2035 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2036 {
2037 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2038 croak ("\3async_pool terminate\2\n");
2039 }
2040
2041 av_clear (GvAV (PL_defgv));
2042 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2043 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2044
2045 coro->prio = 0;
2046
2047 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2048 api_trace (coro_current, 0);
2049
2050 av_push (av_async_pool, newSVsv (coro_current));
2051}
2052
2053
2054MODULE = Coro::State PACKAGE = Coro::AIO
2055
2056SV *
2057_get_state ()
2058 CODE:
2059{
2060 struct io_state *data;
2061
2062 RETVAL = newSV (sizeof (struct io_state));
2063 data = (struct io_state *)SvPVX (RETVAL);
2064 SvCUR_set (RETVAL, sizeof (struct io_state));
2065 SvPOK_only (RETVAL);
2066
2067 data->errorno = errno;
2068 data->laststype = PL_laststype;
2069 data->laststatval = PL_laststatval;
2070 data->statcache = PL_statcache;
2071}
2072 OUTPUT: 3595 OUTPUT:
2073 RETVAL 3596 RETVAL
2074 3597
2075void
2076_set_state (char *data_)
2077 PROTOTYPE: $
2078 CODE:
2079{
2080 struct io_state *data = (void *)data_;
2081
2082 errno = data->errorno;
2083 PL_laststype = data->laststype;
2084 PL_laststatval = data->laststatval;
2085 PL_statcache = data->statcache;
2086}
2087
2088 3598
2089MODULE = Coro::State PACKAGE = Coro::AnyEvent 3599MODULE = Coro::State PACKAGE = Coro::AnyEvent
2090 3600
2091BOOT: 3601BOOT:
2092 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3602 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2093 3603
2094SV * 3604void
2095_schedule (...) 3605_schedule (...)
2096 PROTOTYPE: @
2097 CODE: 3606 CODE:
2098{ 3607{
2099 static int incede; 3608 static int incede;
2100 3609
2101 api_cede_notself (); 3610 api_cede_notself (aTHX);
2102 3611
2103 ++incede; 3612 ++incede;
2104 while (coro_nready >= incede && api_cede ()) 3613 while (coro_nready >= incede && api_cede (aTHX))
2105 ; 3614 ;
2106 3615
2107 sv_setsv (sv_activity, &PL_sv_undef); 3616 sv_setsv (sv_activity, &PL_sv_undef);
2108 if (coro_nready >= incede) 3617 if (coro_nready >= incede)
2109 { 3618 {
2110 PUSHMARK (SP); 3619 PUSHMARK (SP);
2111 PUTBACK; 3620 PUTBACK;
2112 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3621 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2113 SPAGAIN;
2114 } 3622 }
2115 3623
2116 --incede; 3624 --incede;
2117} 3625}
2118 3626
3627
3628MODULE = Coro::State PACKAGE = Coro::AIO
3629
3630void
3631_register (char *target, char *proto, SV *req)
3632 CODE:
3633{
3634 CV *req_cv = coro_sv_2cv (aTHX_ req);
3635 /* newXSproto doesn't return the CV on 5.8 */
3636 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3637 sv_setpv ((SV *)slf_cv, proto);
3638 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3639}
3640

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