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Comparing Coro/Coro/State.xs (file contents):
Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC vs.
Revision 1.359 by root, Mon Jun 29 05:07:19 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#include <setjmp.h> 21# define setjmp _setjmp /* deep magic */
21#else 22#else
22# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
23#endif 24#endif
24 25
25#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
45# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
46#endif 47#endif
47 48
48#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif 51#endif
54 52
55/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
57 55
58#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
63 61
64#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr 63# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
67# endif 65# endif
… …
80# ifndef IS_PADCONST 78# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
82# endif 80# endif
83#endif 81#endif
84 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
85/* 5.8.8 */ 93/* 5.8.8 */
86#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
88#endif 96#endif
89#ifndef newSV 97#ifndef newSV
90# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
91#endif 99#endif
92 100#ifndef CvISXSUB_on
93/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
94#ifndef CxHASARGS 102#endif
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs 103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
96#endif 108#endif
97 109
98/* 5.8.7 */ 110/* 5.8.7 */
99#ifndef SvRV_set 111#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 126#endif
115 127
116/* The next macros try to return the current stack pointer, in an as 128/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */ 129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
118#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
120 137
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_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 */ 164#ifdef __linux
150struct io_state 165# include <time.h> /* for timespec */
151{ 166# include <syscall.h> /* for SYS_* */
152 int errorno; 167# ifdef SYS_clock_gettime
153 I32 laststype; 168# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
154 int laststatval; 169# define CORO_CLOCK_MONOTONIC 1
155 Stat_t statcache; 170# define CORO_CLOCK_THREAD_CPUTIME_ID 3
156}; 171# endif
172#endif
157 173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176/* we hijack an hopefully unused CV flag for our purposes */
177#define CVf_SLF 0x4000
178static OP *pp_slf (pTHX);
179
180static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 181static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 182static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 183static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 184static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 185static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 186static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
187
188static AV *av_destroy; /* destruction queue */
189static SV *sv_manager; /* the manager coro */
190static SV *sv_idle; /* $Coro::idle */
164 191
165static GV *irsgv; /* $/ */ 192static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 193static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 194static SV *rv_diehook;
168static SV *rv_warnhook; 195static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 196static HV *hv_sig; /* %SIG */
170 197
171/* async_pool helper stuff */ 198/* async_pool helper stuff */
172static SV *sv_pool_rss; 199static SV *sv_pool_rss;
173static SV *sv_pool_size; 200static SV *sv_pool_size;
201static SV *sv_async_pool_idle; /* description string */
174static AV *av_async_pool; 202static AV *av_async_pool; /* idle pool */
203static SV *sv_Coro; /* class string */
204static CV *cv_pool_handler;
205static CV *cv_coro_state_new;
206
207/* Coro::AnyEvent */
208static SV *sv_activity;
209
210/* enable processtime/realtime profiling */
211static char profile_times;
212typedef U32 coro_ts[2];
175 213
176static struct coro_cctx *cctx_first; 214static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle; 215static int cctx_count, cctx_idle;
178 216
179enum { 217enum {
… …
184 CC_TRACE_LINE = 0x10, /* trace each statement */ 222 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 223 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186}; 224};
187 225
188/* this is a structure representing a c-level coroutine */ 226/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx { 227typedef struct coro_cctx
228{
190 struct coro_cctx *next; 229 struct coro_cctx *next;
191 230
192 /* the stack */ 231 /* the stack */
193 void *sptr; 232 void *sptr;
194 size_t ssize; 233 size_t ssize;
… …
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 236 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 237 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env; 238 JMPENV *top_env;
200 coro_context cctx; 239 coro_context cctx;
201 240
241 U32 gen;
202#if CORO_USE_VALGRIND 242#if CORO_USE_VALGRIND
203 int valgrind_id; 243 int valgrind_id;
204#endif 244#endif
205 unsigned char flags; 245 unsigned char flags;
206} coro_cctx; 246} coro_cctx;
247
248coro_cctx *cctx_current; /* the currently running cctx */
249
250/*****************************************************************************/
207 251
208enum { 252enum {
209 CF_RUNNING = 0x0001, /* coroutine is running */ 253 CF_RUNNING = 0x0001, /* coroutine is running */
210 CF_READY = 0x0002, /* coroutine is ready */ 254 CF_READY = 0x0002, /* coroutine is ready */
211 CF_NEW = 0x0004, /* has never been switched to */ 255 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 256 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
257 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
213}; 258};
214 259
215/* the structure where most of the perl state is stored, overlaid on the cxstack */ 260/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct { 261typedef struct
262{
217 SV *defsv; 263 SV *defsv;
218 AV *defav; 264 AV *defav;
219 SV *errsv; 265 SV *errsv;
220 SV *irsgv; 266 SV *irsgv;
267 HV *hinthv;
221#define VAR(name,type) type name; 268#define VAR(name,type) type name;
222# include "state.h" 269# include "state.h"
223#undef VAR 270#undef VAR
224} perl_slots; 271} perl_slots;
225 272
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 273#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227 274
228/* this is a structure representing a perl-level coroutine */ 275/* this is a structure representing a perl-level coroutine */
229struct coro { 276struct coro {
230 /* the c coroutine allocated to this perl coroutine, if any */ 277 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx; 278 coro_cctx *cctx;
232 279
233 /* process data */ 280 /* ready queue */
281 struct coro *next_ready;
282
283 /* state data */
284 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack; 285 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */ 286 perl_slots *slot; /* basically the saved sp */
236 287
288 CV *startcv; /* the CV to execute */
237 AV *args; /* data associated with this coroutine (initial args) */ 289 AV *args; /* data associated with this coroutine (initial args) */
238 int refcnt; /* coroutines are refcounted, yes */ 290 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */ 291 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */ 292 HV *hv; /* the perl hash associated with this coro, if any */
293 void (*on_destroy)(pTHX_ struct coro *coro);
241 294
242 /* statistics */ 295 /* statistics */
243 int usecount; /* number of transfers to this coro */ 296 int usecount; /* number of transfers to this coro */
244 297
245 /* coro process data */ 298 /* coro process data */
246 int prio; 299 int prio;
247 SV *throw; /* exception to be thrown */ 300 SV *except; /* exception to be thrown */
301 SV *rouse_cb;
248 302
249 /* async_pool */ 303 /* async_pool */
250 SV *saved_deffh; 304 SV *saved_deffh;
305 SV *invoke_cb;
306 AV *invoke_av;
307
308 /* on_enter/on_leave */
309 AV *on_enter;
310 AV *on_leave;
251 311
252 /* linked list */ 312 /* linked list */
253 struct coro *next, *prev; 313 struct coro *next, *prev;
254}; 314};
255 315
256typedef struct coro *Coro__State; 316typedef struct coro *Coro__State;
257typedef struct coro *Coro__State_or_hashref; 317typedef struct coro *Coro__State_or_hashref;
258 318
319/* the following variables are effectively part of the perl context */
320/* and get copied between struct coro and these variables */
321/* the mainr easonw e don't support windows process emulation */
322static struct CoroSLF slf_frame; /* the current slf frame */
323
259/** Coro ********************************************************************/ 324/** Coro ********************************************************************/
260 325
261#define PRIO_MAX 3 326#define CORO_PRIO_MAX 3
262#define PRIO_HIGH 1 327#define CORO_PRIO_HIGH 1
263#define PRIO_NORMAL 0 328#define CORO_PRIO_NORMAL 0
264#define PRIO_LOW -1 329#define CORO_PRIO_LOW -1
265#define PRIO_IDLE -3 330#define CORO_PRIO_IDLE -3
266#define PRIO_MIN -4 331#define CORO_PRIO_MIN -4
267 332
268/* for Coro.pm */ 333/* for Coro.pm */
269static SV *coro_current; 334static SV *coro_current;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 335static SV *coro_readyhook;
271static int coro_nready; 336static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
337static CV *cv_coro_run, *cv_coro_terminate;
272static struct coro *coro_first; 338static struct coro *coro_first;
339#define coro_nready coroapi.nready
273 340
274/** lowlevel stuff **********************************************************/ 341/** lowlevel stuff **********************************************************/
275 342
276static SV * 343static SV *
277coro_get_sv (pTHX_ const char *name, int create) 344coro_get_sv (pTHX_ const char *name, int create)
… …
301 get_hv (name, create); 368 get_hv (name, create);
302#endif 369#endif
303 return get_hv (name, create); 370 return get_hv (name, create);
304} 371}
305 372
373/* may croak */
374INLINE CV *
375coro_sv_2cv (pTHX_ SV *sv)
376{
377 HV *st;
378 GV *gvp;
379 CV *cv = sv_2cv (sv, &st, &gvp, 0);
380
381 if (!cv)
382 croak ("code reference expected");
383
384 return cv;
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
306static AV * 439static AV *
307coro_clone_padlist (pTHX_ CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
308{ 441{
309 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
310 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
311 444
312 newpadlist = newAV (); 445 newpadlist = newAV ();
… …
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif 451#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist); 453 --AvFILLp (padlist);
321 454
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
323 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
324 457
325 return newpadlist; 458 return newpadlist;
326} 459}
327 460
328static void 461static void
329free_padlist (pTHX_ AV *padlist) 462free_padlist (pTHX_ AV *padlist)
330{ 463{
331 /* may be during global destruction */ 464 /* may be during global destruction */
332 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
333 { 466 {
334 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
335 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
336 { 470 {
337 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
338 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
339 { 473 I32 j = AvFILLp (av);
340 SV *sv; 474
341 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
342 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
343
344 SvREFCNT_dec (*svp);
345 }
346 } 480 }
347 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
348 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
349 } 486 }
350} 487}
351 488
352static int 489static int
353coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
354{ 491{
355 AV *padlist; 492 AV *padlist;
356 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return;
357 498
358 /* casting is fun. */ 499 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist); 501 free_padlist (aTHX_ padlist);
361 502
503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
504
362 return 0; 505 return 0;
363} 506}
364
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext
366#define CORO_MAGIC_type_state PERL_MAGIC_ext
367 507
368static MGVTBL coro_cv_vtbl = { 508static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0, 509 0, 0, 0, 0,
370 coro_cv_free 510 coro_cv_free
371}; 511};
372
373#define CORO_MAGIC(sv,type) \
374 SvMAGIC (sv) \
375 ? SvMAGIC (sv)->mg_type == type \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0
379
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
381#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
382
383static struct coro *
384SvSTATE_ (pTHX_ SV *coro)
385{
386 HV *stash;
387 MAGIC *mg;
388
389 if (SvROK (coro))
390 coro = SvRV (coro);
391
392 if (expect_false (SvTYPE (coro) != SVt_PVHV))
393 croak ("Coro::State object required");
394
395 stash = SvSTASH (coro);
396 if (expect_false (stash != coro_stash && stash != coro_state_stash))
397 {
398 /* very slow, but rare, check */
399 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
400 croak ("Coro::State object required");
401 }
402
403 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr;
405}
406
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
408 512
409/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
410static void 514static void
411get_padlist (pTHX_ CV *cv) 515get_padlist (pTHX_ CV *cv)
412{ 516{
… …
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else 522 else
419 { 523 {
420#if CORO_PREFER_PERL_FUNCTIONS 524#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */ 525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
422 CV *cp = Perl_cv_clone (cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
423 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
426#else 531#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
428#endif 533#endif
429 } 534 }
430} 535}
431 536
432static void 537static void
… …
439 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
440 545
441 av = (AV *)mg->mg_obj; 546 av = (AV *)mg->mg_obj;
442 547
443 if (expect_false (AvFILLp (av) >= AvMAX (av))) 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
444 av_extend (av, AvMAX (av) + 1); 549 av_extend (av, AvFILLp (av) + 1);
445 550
446 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
447} 552}
448 553
449/** load & save, init *******************************************************/ 554/** load & save, init *******************************************************/
555
556static void
557on_enterleave_call (pTHX_ SV *cb);
450 558
451static void 559static void
452load_perl (pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
453{ 561{
454 perl_slots *slot = c->slot; 562 perl_slots *slot = c->slot;
455 c->slot = 0; 563 c->slot = 0;
456 564
457 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
458 566
459 GvSV (PL_defgv) = slot->defsv; 567 GvSV (PL_defgv) = slot->defsv;
460 GvAV (PL_defgv) = slot->defav; 568 GvAV (PL_defgv) = slot->defav;
461 GvSV (PL_errgv) = slot->errsv; 569 GvSV (PL_errgv) = slot->errsv;
462 GvSV (irsgv) = slot->irsgv; 570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
463 572
464 #define VAR(name,type) PL_ ## name = slot->name; 573 #define VAR(name,type) PL_ ## name = slot->name;
465 # include "state.h" 574 # include "state.h"
466 #undef VAR 575 #undef VAR
467 576
… …
478 CvPADLIST (cv) = (AV *)POPs; 587 CvPADLIST (cv) = (AV *)POPs;
479 } 588 }
480 589
481 PUTBACK; 590 PUTBACK;
482 } 591 }
592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (c->on_enter))
597 {
598 int i;
599
600 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
601 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
602 }
483} 603}
484 604
485static void 605static void
486save_perl (pTHX_ Coro__State c) 606save_perl (pTHX_ Coro__State c)
487{ 607{
608 if (expect_false (c->on_leave))
609 {
610 int i;
611
612 for (i = AvFILLp (c->on_leave); i >= 0; --i)
613 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
614 }
615
616 c->except = CORO_THROW;
617 c->slf_frame = slf_frame;
618
488 { 619 {
489 dSP; 620 dSP;
490 I32 cxix = cxstack_ix; 621 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack; 622 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo; 623 PERL_SI *top_si = PL_curstackinfo;
… …
502 { 633 {
503 while (expect_true (cxix >= 0)) 634 while (expect_true (cxix >= 0))
504 { 635 {
505 PERL_CONTEXT *cx = &ccstk[cxix--]; 636 PERL_CONTEXT *cx = &ccstk[cxix--];
506 637
507 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 638 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
508 { 639 {
509 CV *cv = cx->blk_sub.cv; 640 CV *cv = cx->blk_sub.cv;
510 641
511 if (expect_true (CvDEPTH (cv))) 642 if (expect_true (CvDEPTH (cv)))
512 { 643 {
513 EXTEND (SP, 3); 644 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv)); 645 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 646 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516 PUSHs ((SV *)cv); 647 PUSHs ((SV *)cv);
517 648
518 CvDEPTH (cv) = 0; 649 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv); 650 get_padlist (aTHX_ cv);
520 } 651 }
… …
547 c->mainstack = PL_mainstack; 678 c->mainstack = PL_mainstack;
548 679
549 { 680 {
550 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 681 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
551 682
552 slot->defav = GvAV (PL_defgv); 683 slot->defav = GvAV (PL_defgv);
553 slot->defsv = DEFSV; 684 slot->defsv = DEFSV;
554 slot->errsv = ERRSV; 685 slot->errsv = ERRSV;
555 slot->irsgv = GvSV (irsgv); 686 slot->irsgv = GvSV (irsgv);
687 slot->hinthv = GvHV (PL_hintgv);
556 688
557 #define VAR(name,type) slot->name = PL_ ## name; 689 #define VAR(name,type) slot->name = PL_ ## name;
558 # include "state.h" 690 # include "state.h"
559 #undef VAR 691 #undef VAR
560 } 692 }
561} 693}
562 694
563/* 695/*
564 * allocate various perl stacks. This is an exact copy 696 * allocate various perl stacks. This is almost an exact copy
565 * of perl.c:init_stacks, except that it uses less memory 697 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do 698 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace. 699 * not usually need a lot of stackspace.
568 */ 700 */
569#if CORO_PREFER_PERL_FUNCTIONS 701#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks 702# define coro_init_stacks(thx) init_stacks ()
571#else 703#else
572static void 704static void
573coro_init_stacks (pTHX) 705coro_init_stacks (pTHX)
574{ 706{
575 PL_curstackinfo = new_stackinfo(32, 8); 707 PL_curstackinfo = new_stackinfo(32, 8);
… …
612 744
613/* 745/*
614 * destroy the stacks, the callchain etc... 746 * destroy the stacks, the callchain etc...
615 */ 747 */
616static void 748static void
617coro_destroy_stacks (pTHX) 749coro_destruct_stacks (pTHX)
618{ 750{
619 while (PL_curstackinfo->si_next) 751 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next; 752 PL_curstackinfo = PL_curstackinfo->si_next;
621 753
622 while (PL_curstackinfo) 754 while (PL_curstackinfo)
… …
638#if !PERL_VERSION_ATLEAST (5,10,0) 770#if !PERL_VERSION_ATLEAST (5,10,0)
639 Safefree (PL_retstack); 771 Safefree (PL_retstack);
640#endif 772#endif
641} 773}
642 774
775#define CORO_RSS \
776 rss += sizeof (SYM (curstackinfo)); \
777 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
778 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
779 rss += SYM (tmps_max) * sizeof (SV *); \
780 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
781 rss += SYM (scopestack_max) * sizeof (I32); \
782 rss += SYM (savestack_max) * sizeof (ANY);
783
643static size_t 784static size_t
644coro_rss (pTHX_ struct coro *coro) 785coro_rss (pTHX_ struct coro *coro)
645{ 786{
646 size_t rss = sizeof (*coro); 787 size_t rss = sizeof (*coro);
647 788
648 if (coro->mainstack) 789 if (coro->mainstack)
649 { 790 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING) 791 if (coro->flags & CF_RUNNING)
654 { 792 {
655 slot = &tmp_slot; 793 #define SYM(sym) PL_ ## sym
656 794 CORO_RSS;
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR 795 #undef SYM
660 } 796 }
661 else 797 else
662 slot = coro->slot; 798 {
663 799 #define SYM(sym) coro->slot->sym
664 rss += sizeof (slot->curstackinfo); 800 CORO_RSS;
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 801 #undef SYM
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 802 }
667 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY);
671
672#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *);
674#endif
675 } 803 }
676 804
677 return rss; 805 return rss;
678} 806}
679 807
680/** coroutine stack handling ************************************************/ 808/** coroutine stack handling ************************************************/
681 809
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 810static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 811static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
812static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
813
814/* apparently < 5.8.8 */
815#ifndef MgPV_nolen_const
816#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
817 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
818 (const char*)(mg)->mg_ptr)
819#endif
684 820
685/* 821/*
686 * This overrides the default magic get method of %SIG elements. 822 * This overrides the default magic get method of %SIG elements.
687 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 823 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
688 * and instead of tryign to save and restore the hash elements, we just provide 824 * and instead of trying to save and restore the hash elements, we just provide
689 * readback here. 825 * readback here.
690 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
691 * not expecting this to actually change the hook. This is a potential problem
692 * when a schedule happens then, but we ignore this.
693 */ 826 */
694static int 827static int
695coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 828coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
696{ 829{
697 const char *s = MgPV_nolen_const (mg); 830 const char *s = MgPV_nolen_const (mg);
698 831
699 if (*s == '_') 832 if (*s == '_')
700 { 833 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 834 SV **svp = 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 835
836 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
837 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
838
839 if (svp)
840 {
841 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
842 return 0;
843 }
703 } 844 }
704 845
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 846 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
706} 847}
707 848
708static int 849static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 850coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
710{ 851{
711 const char *s = MgPV_nolen_const (mg); 852 const char *s = MgPV_nolen_const (mg);
712 853
713 if (*s == '_') 854 if (*s == '_')
714 { 855 {
… …
718 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 859 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
719 860
720 if (svp) 861 if (svp)
721 { 862 {
722 SV *old = *svp; 863 SV *old = *svp;
723 *svp = newSVsv (sv); 864 *svp = 0;
724 SvREFCNT_dec (old); 865 SvREFCNT_dec (old);
725 return 0; 866 return 0;
726 } 867 }
727 } 868 }
728 869
870 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
871}
872
873static int
874coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
875{
876 const char *s = MgPV_nolen_const (mg);
877
878 if (*s == '_')
879 {
880 SV **svp = 0;
881
882 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
883 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
884
885 if (svp)
886 {
887 SV *old = *svp;
888 *svp = SvOK (sv) ? newSVsv (sv) : 0;
889 SvREFCNT_dec (old);
890 return 0;
891 }
892 }
893
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 894 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730} 895}
731 896
732static void 897static void
898prepare_nop (pTHX_ struct coro_transfer_args *ta)
899{
900 /* kind of mega-hacky, but works */
901 ta->next = ta->prev = (struct coro *)ta;
902}
903
904static int
905slf_check_nop (pTHX_ struct CoroSLF *frame)
906{
907 return 0;
908}
909
910static int
911slf_check_repeat (pTHX_ struct CoroSLF *frame)
912{
913 return 1;
914}
915
916static UNOP coro_setup_op;
917
918static void NOINLINE /* noinline to keep it out of the transfer fast path */
733coro_setup (pTHX_ struct coro *coro) 919coro_setup (pTHX_ struct coro *coro)
734{ 920{
735 /* 921 /*
736 * emulate part of the perl startup here. 922 * emulate part of the perl startup here.
737 */ 923 */
… …
739 925
740 PL_runops = RUNOPS_DEFAULT; 926 PL_runops = RUNOPS_DEFAULT;
741 PL_curcop = &PL_compiling; 927 PL_curcop = &PL_compiling;
742 PL_in_eval = EVAL_NULL; 928 PL_in_eval = EVAL_NULL;
743 PL_comppad = 0; 929 PL_comppad = 0;
930 PL_comppad_name = 0;
931 PL_comppad_name_fill = 0;
932 PL_comppad_name_floor = 0;
744 PL_curpm = 0; 933 PL_curpm = 0;
745 PL_curpad = 0; 934 PL_curpad = 0;
746 PL_localizing = 0; 935 PL_localizing = 0;
747 PL_dirty = 0; 936 PL_dirty = 0;
748 PL_restartop = 0; 937 PL_restartop = 0;
749#if PERL_VERSION_ATLEAST (5,10,0) 938#if PERL_VERSION_ATLEAST (5,10,0)
750 PL_parser = 0; 939 PL_parser = 0;
751#endif 940#endif
941 PL_hints = 0;
752 942
753 /* recreate the die/warn hooks */ 943 /* recreate the die/warn hooks */
754 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 944 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
755 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 945 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
756 946
757 GvSV (PL_defgv) = newSV (0); 947 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0; 948 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0); 949 GvSV (PL_errgv) = newSV (0);
760 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 950 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
951 GvHV (PL_hintgv) = 0;
761 PL_rs = newSVsv (GvSV (irsgv)); 952 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 953 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763 954
764 { 955 {
765 dSP; 956 dSP;
766 LOGOP myop; 957 UNOP myop;
767 958
768 Zero (&myop, 1, LOGOP); 959 Zero (&myop, 1, UNOP);
769 myop.op_next = Nullop; 960 myop.op_next = Nullop;
961 myop.op_type = OP_ENTERSUB;
770 myop.op_flags = OPf_WANT_VOID; 962 myop.op_flags = OPf_WANT_VOID;
771 963
772 PUSHMARK (SP); 964 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 965 PUSHs ((SV *)coro->startcv);
774 PUTBACK; 966 PUTBACK;
775 PL_op = (OP *)&myop; 967 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 968 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN;
778 } 969 }
779 970
780 /* this newly created coroutine might be run on an existing cctx which most 971 /* this newly created coroutine might be run on an existing cctx which most
781 * likely was suspended in set_stacklevel, called from entersub. 972 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
782 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783 * so we ENTER here for symmetry
784 */ 973 */
785 ENTER; 974 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
786} 975 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
787 976
977 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
978 coro_setup_op.op_next = PL_op;
979 coro_setup_op.op_type = OP_ENTERSUB;
980 coro_setup_op.op_ppaddr = pp_slf;
981 /* no flags etc. required, as an init function won't be called */
982
983 PL_op = (OP *)&coro_setup_op;
984
985 /* copy throw, in case it was set before coro_setup */
986 CORO_THROW = coro->except;
987}
988
788static void 989static void
789coro_destroy (pTHX_ struct coro *coro) 990coro_unwind_stacks (pTHX)
790{ 991{
791 if (!IN_DESTRUCT) 992 if (!IN_DESTRUCT)
792 { 993 {
793 /* restore all saved variables and stuff */ 994 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0); 995 LEAVE_SCOPE (0);
… …
802 POPSTACK_TO (PL_mainstack); 1003 POPSTACK_TO (PL_mainstack);
803 1004
804 /* unwind main stack */ 1005 /* unwind main stack */
805 dounwind (-1); 1006 dounwind (-1);
806 } 1007 }
1008}
807 1009
808 SvREFCNT_dec (GvSV (PL_defgv)); 1010static void
809 SvREFCNT_dec (GvAV (PL_defgv)); 1011coro_destruct_perl (pTHX_ struct coro *coro)
810 SvREFCNT_dec (GvSV (PL_errgv)); 1012{
811 SvREFCNT_dec (PL_defoutgv); 1013 SV *svf [9];
812 SvREFCNT_dec (PL_rs);
813 SvREFCNT_dec (GvSV (irsgv));
814 1014
815 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook);
817 1015 {
1016 struct coro *current = SvSTATE_current;
1017
1018 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1019
1020 save_perl (aTHX_ current);
1021 load_perl (aTHX_ coro);
1022
1023 coro_unwind_stacks (aTHX);
1024 coro_destruct_stacks (aTHX);
1025
1026 // now save some sv's to be free'd later
1027 svf [0] = GvSV (PL_defgv);
1028 svf [1] = (SV *)GvAV (PL_defgv);
1029 svf [2] = GvSV (PL_errgv);
1030 svf [3] = (SV *)PL_defoutgv;
1031 svf [4] = PL_rs;
1032 svf [5] = GvSV (irsgv);
1033 svf [6] = (SV *)GvHV (PL_hintgv);
1034 svf [7] = PL_diehook;
1035 svf [8] = PL_warnhook;
1036 assert (9 == sizeof (svf) / sizeof (*svf));
1037
1038 load_perl (aTHX_ current);
1039 }
1040
1041 {
1042 int i;
1043
1044 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1045 SvREFCNT_dec (svf [i]);
1046
818 SvREFCNT_dec (coro->saved_deffh); 1047 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw); 1048 SvREFCNT_dec (coro->rouse_cb);
820 1049 SvREFCNT_dec (coro->invoke_cb);
821 coro_destroy_stacks (aTHX); 1050 SvREFCNT_dec (coro->invoke_av);
1051 }
822} 1052}
823 1053
824static void 1054INLINE void
825free_coro_mortal (pTHX) 1055free_coro_mortal (pTHX)
826{ 1056{
827 if (expect_true (coro_mortal)) 1057 if (expect_true (coro_mortal))
828 { 1058 {
829 SvREFCNT_dec (coro_mortal); 1059 SvREFCNT_dec (coro_mortal);
… …
834static int 1064static int
835runops_trace (pTHX) 1065runops_trace (pTHX)
836{ 1066{
837 COP *oldcop = 0; 1067 COP *oldcop = 0;
838 int oldcxix = -2; 1068 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx;
841 1069
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1070 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 { 1071 {
844 PERL_ASYNC_CHECK (); 1072 PERL_ASYNC_CHECK ();
845 1073
846 if (cctx->flags & CC_TRACE_ALL) 1074 if (cctx_current->flags & CC_TRACE_ALL)
847 { 1075 {
848 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1076 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
849 { 1077 {
850 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1078 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
851 SV **bot, **top; 1079 SV **bot, **top;
852 AV *av = newAV (); /* return values */ 1080 AV *av = newAV (); /* return values */
853 SV **cb; 1081 SV **cb;
… …
863 : cx->blk_gimme == G_SCALAR ? bot + 1 1091 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot; 1092 : bot;
865 1093
866 av_extend (av, top - bot); 1094 av_extend (av, top - bot);
867 while (bot < top) 1095 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++)); 1096 av_push (av, SvREFCNT_inc_NN (*bot++));
869 1097
870 PL_runops = RUNOPS_DEFAULT; 1098 PL_runops = RUNOPS_DEFAULT;
871 ENTER; 1099 ENTER;
872 SAVETMPS; 1100 SAVETMPS;
873 EXTEND (SP, 3); 1101 EXTEND (SP, 3);
… …
890 1118
891 if (PL_curcop != &PL_compiling) 1119 if (PL_curcop != &PL_compiling)
892 { 1120 {
893 SV **cb; 1121 SV **cb;
894 1122
895 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1123 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
896 { 1124 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1125 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 1126
899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1127 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
900 { 1128 {
901 runops_proc_t old_runops = PL_runops;
902 dSP; 1129 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv); 1130 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0)); 1131 SV *fullname = sv_2mortal (newSV (0));
905 1132
906 if (isGV (gv)) 1133 if (isGV (gv))
… …
911 SAVETMPS; 1138 SAVETMPS;
912 EXTEND (SP, 3); 1139 EXTEND (SP, 3);
913 PUSHMARK (SP); 1140 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes); 1141 PUSHs (&PL_sv_yes);
915 PUSHs (fullname); 1142 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1143 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK; 1144 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1145 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
919 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1146 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN; 1147 SPAGAIN;
921 FREETMPS; 1148 FREETMPS;
… …
924 } 1151 }
925 1152
926 oldcxix = cxstack_ix; 1153 oldcxix = cxstack_ix;
927 } 1154 }
928 1155
929 if (cctx->flags & CC_TRACE_LINE) 1156 if (cctx_current->flags & CC_TRACE_LINE)
930 { 1157 {
931 dSP; 1158 dSP;
932 1159
933 PL_runops = RUNOPS_DEFAULT; 1160 PL_runops = RUNOPS_DEFAULT;
934 ENTER; 1161 ENTER;
… …
953 1180
954 TAINT_NOT; 1181 TAINT_NOT;
955 return 0; 1182 return 0;
956} 1183}
957 1184
958/* inject a fake call to Coro::State::_cctx_init into the execution */ 1185static struct CoroSLF cctx_ssl_frame;
959/* _cctx_init should be careful, as it could be called at almost any time */ 1186
960/* during execution of a perl program */ 1187static void
1188slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1189{
1190 ta->prev = 0;
1191}
1192
1193static int
1194slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1195{
1196 *frame = cctx_ssl_frame;
1197
1198 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1199}
1200
1201/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
961static void NOINLINE 1202static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx) 1203cctx_prepare (pTHX)
963{ 1204{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env; 1205 PL_top_env = &PL_start_env;
968 1206
969 if (cctx->flags & CC_TRACE) 1207 if (cctx_current->flags & CC_TRACE)
970 PL_runops = runops_trace; 1208 PL_runops = runops_trace;
971 1209
972 Zero (&myop, 1, LOGOP); 1210 /* we already must be executing an SLF op, there is no other valid way
973 myop.op_next = PL_op; 1211 * that can lead to creation of a new cctx */
974 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1212 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1213 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
975 1214
976 PUSHMARK (SP); 1215 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
977 EXTEND (SP, 2); 1216 cctx_ssl_frame = slf_frame;
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1217
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1218 slf_frame.prepare = slf_prepare_set_stacklevel;
980 PUTBACK; 1219 slf_frame.check = slf_check_set_stacklevel;
981 PL_op = (OP *)&myop; 1220}
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1221
983 SPAGAIN; 1222/* the tail of transfer: execute stuff we can only do after a transfer */
1223INLINE void
1224transfer_tail (pTHX)
1225{
1226 free_coro_mortal (aTHX);
984} 1227}
985 1228
986/* 1229/*
987 * this is a _very_ stripped down perl interpreter ;) 1230 * this is a _very_ stripped down perl interpreter ;)
988 */ 1231 */
989static void 1232static void
990cctx_run (void *arg) 1233cctx_run (void *arg)
991{ 1234{
1235#ifdef USE_ITHREADS
1236# if CORO_PTHREAD
1237 PERL_SET_CONTEXT (coro_thx);
1238# endif
1239#endif
1240 {
992 dTHX; 1241 dTHX;
993 1242
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1243 /* normally we would need to skip the entersub here */
995 UNLOCK; 1244 /* not doing so will re-execute it, which is exactly what we want */
996
997 /* we now skip the entersub that lead to transfer() */
998 PL_op = PL_op->op_next; 1245 /* PL_nop = PL_nop->op_next */
999 1246
1000 /* inject a fake subroutine call to cctx_init */ 1247 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg); 1248 cctx_prepare (aTHX);
1002 1249
1250 /* cctx_run is the alternative tail of transfer() */
1251 transfer_tail (aTHX);
1252
1003 /* somebody or something will hit me for both perl_run and PL_restartop */ 1253 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op; 1254 PL_restartop = PL_op;
1005 perl_run (PL_curinterp); 1255 perl_run (PL_curinterp);
1006
1007 /* 1256 /*
1257 * Unfortunately, there is no way to get at the return values of the
1258 * coro body here, as perl_run destroys these
1259 */
1260
1261 /*
1008 * If perl-run returns we assume exit() was being called or the coro 1262 * If perl-run returns we assume exit() was being called or the coro
1009 * fell off the end, which seems to be the only valid (non-bug) 1263 * fell off the end, which seems to be the only valid (non-bug)
1010 * reason for perl_run to return. We try to exit by jumping to the 1264 * reason for perl_run to return. We try to exit by jumping to the
1011 * bootstrap-time "top" top_env, as we cannot restore the "main" 1265 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept 1266 * coroutine as Coro has no such concept.
1267 * This actually isn't valid with the pthread backend, but OSes requiring
1268 * that backend are too broken to do it in a standards-compliant way.
1013 */ 1269 */
1014 PL_top_env = main_top_env; 1270 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1271 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1272 }
1016} 1273}
1017 1274
1018static coro_cctx * 1275static coro_cctx *
1019cctx_new () 1276cctx_new ()
1020{ 1277{
1021 coro_cctx *cctx; 1278 coro_cctx *cctx;
1279
1280 ++cctx_count;
1281 New (0, cctx, 1, coro_cctx);
1282
1283 cctx->gen = cctx_gen;
1284 cctx->flags = 0;
1285 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1286
1287 return cctx;
1288}
1289
1290/* create a new cctx only suitable as source */
1291static coro_cctx *
1292cctx_new_empty ()
1293{
1294 coro_cctx *cctx = cctx_new ();
1295
1296 cctx->sptr = 0;
1297 coro_create (&cctx->cctx, 0, 0, 0, 0);
1298
1299 return cctx;
1300}
1301
1302/* create a new cctx suitable as destination/running a perl interpreter */
1303static coro_cctx *
1304cctx_new_run ()
1305{
1306 coro_cctx *cctx = cctx_new ();
1022 void *stack_start; 1307 void *stack_start;
1023 size_t stack_size; 1308 size_t stack_size;
1024 1309
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP 1310#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1311 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */ 1312 /* mmap supposedly does allocate-on-write for us */
1032 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1313 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033 1314
1034 if (cctx->sptr != (void *)-1) 1315 if (cctx->sptr != (void *)-1)
1035 { 1316 {
1036# if CORO_STACKGUARD 1317 #if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1318 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif 1319 #endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1320 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1321 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED; 1322 cctx->flags |= CC_MAPPED;
1042 } 1323 }
1043 else 1324 else
1044#endif 1325#endif
1045 { 1326 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long); 1327 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long); 1328 New (0, cctx->sptr, cctx_stacksize, long);
1048 1329
1049 if (!cctx->sptr) 1330 if (!cctx->sptr)
1050 { 1331 {
1051 perror ("FATAL: unable to allocate stack for coroutine"); 1332 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052 _exit (EXIT_FAILURE); 1333 _exit (EXIT_FAILURE);
1053 } 1334 }
1054 1335
1055 stack_start = cctx->sptr; 1336 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize; 1337 stack_size = cctx->ssize;
1057 } 1338 }
1058 1339
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1340 #if CORO_USE_VALGRIND
1341 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1342 #endif
1343
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1344 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061 1345
1062 return cctx; 1346 return cctx;
1063} 1347}
1064 1348
… …
1066cctx_destroy (coro_cctx *cctx) 1350cctx_destroy (coro_cctx *cctx)
1067{ 1351{
1068 if (!cctx) 1352 if (!cctx)
1069 return; 1353 return;
1070 1354
1355 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1356
1071 --cctx_count; 1357 --cctx_count;
1358 coro_destroy (&cctx->cctx);
1072 1359
1360 /* coro_transfer creates new, empty cctx's */
1361 if (cctx->sptr)
1362 {
1073#if CORO_USE_VALGRIND 1363 #if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1364 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif 1365 #endif
1076 1366
1077#if HAVE_MMAP 1367#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED) 1368 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize); 1369 munmap (cctx->sptr, cctx->ssize);
1080 else 1370 else
1081#endif 1371#endif
1082 Safefree (cctx->sptr); 1372 Safefree (cctx->sptr);
1373 }
1083 1374
1084 Safefree (cctx); 1375 Safefree (cctx);
1085} 1376}
1086 1377
1087/* wether this cctx should be destructed */ 1378/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1379#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1089 1380
1090static coro_cctx * 1381static coro_cctx *
1091cctx_get (pTHX) 1382cctx_get (pTHX)
1092{ 1383{
1093 while (expect_true (cctx_first)) 1384 while (expect_true (cctx_first))
… …
1100 return cctx; 1391 return cctx;
1101 1392
1102 cctx_destroy (cctx); 1393 cctx_destroy (cctx);
1103 } 1394 }
1104 1395
1105 return cctx_new (); 1396 return cctx_new_run ();
1106} 1397}
1107 1398
1108static void 1399static void
1109cctx_put (coro_cctx *cctx) 1400cctx_put (coro_cctx *cctx)
1110{ 1401{
1402 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1403
1111 /* free another cctx if overlimit */ 1404 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1405 if (expect_false (cctx_idle >= cctx_max_idle))
1113 { 1406 {
1114 coro_cctx *first = cctx_first; 1407 coro_cctx *first = cctx_first;
1115 cctx_first = first->next; 1408 cctx_first = first->next;
1116 --cctx_idle; 1409 --cctx_idle;
1117 1410
… …
1126/** coroutine switching *****************************************************/ 1419/** coroutine switching *****************************************************/
1127 1420
1128static void 1421static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next) 1422transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{ 1423{
1424 /* TODO: throwing up here is considered harmful */
1425
1131 if (expect_true (prev != next)) 1426 if (expect_true (prev != next))
1132 { 1427 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1428 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1429 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1135 1430
1136 if (expect_false (next->flags & CF_RUNNING))
1137 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1138
1139 if (expect_false (next->flags & CF_DESTROYED)) 1431 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1140 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1432 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1141 1433
1142#if !PERL_VERSION_ATLEAST (5,10,0) 1434#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1435 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1436 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1145#endif 1437#endif
1146 } 1438 }
1147} 1439}
1148 1440
1149/* always use the TRANSFER macro */ 1441/* always use the TRANSFER macro */
1150static void NOINLINE 1442static void NOINLINE /* noinline so we have a fixed stackframe */
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1443transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{ 1444{
1153 dSTACKLEVEL; 1445 dSTACKLEVEL;
1154 static volatile int has_throw;
1155 1446
1156 /* sometimes transfer is only called to set idle_sp */ 1447 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next)) 1448 if (expect_false (!prev))
1158 { 1449 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1450 cctx_current->idle_sp = STACKLEVEL;
1160 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1451 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1161 } 1452 }
1162 else if (expect_true (prev != next)) 1453 else if (expect_true (prev != next))
1163 { 1454 {
1164 coro_cctx *prev__cctx; 1455 coro_cctx *cctx_prev;
1165 1456
1166 if (expect_false (prev->flags & CF_NEW)) 1457 if (expect_false (prev->flags & CF_NEW))
1167 { 1458 {
1168 /* create a new empty context */ 1459 /* create a new empty/source context */
1169 Newz (0, prev->cctx, 1, coro_cctx);
1170 prev->flags &= ~CF_NEW; 1460 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING; 1461 prev->flags |= CF_RUNNING;
1172 } 1462 }
1173 1463
1174 prev->flags &= ~CF_RUNNING; 1464 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING; 1465 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178 1466
1179 /* first get rid of the old state */ 1467 /* first get rid of the old state */
1180 save_perl (aTHX_ prev); 1468 save_perl (aTHX_ prev);
1181 1469
1182 if (expect_false (next->flags & CF_NEW)) 1470 if (expect_false (next->flags & CF_NEW))
… …
1187 coro_setup (aTHX_ next); 1475 coro_setup (aTHX_ next);
1188 } 1476 }
1189 else 1477 else
1190 load_perl (aTHX_ next); 1478 load_perl (aTHX_ next);
1191 1479
1192 prev__cctx = prev->cctx;
1193
1194 /* possibly "free" the cctx */ 1480 /* possibly untie and reuse the cctx */
1195 if (expect_true ( 1481 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL 1482 cctx_current->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE) 1483 && !(cctx_current->flags & CC_TRACE)
1198 && !force_cctx 1484 && !force_cctx
1199 )) 1485 ))
1200 { 1486 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1487 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1202 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1488 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1203 1489
1204 prev->cctx = 0;
1205
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1490 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1207 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1491 /* without this the next cctx_get might destroy the running cctx while still in use */
1208 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1492 if (expect_false (CCTX_EXPIRED (cctx_current)))
1209 if (!next->cctx) 1493 if (expect_true (!next->cctx))
1210 next->cctx = cctx_get (aTHX); 1494 next->cctx = cctx_get (aTHX);
1211 1495
1212 cctx_put (prev__cctx); 1496 cctx_put (cctx_current);
1213 } 1497 }
1498 else
1499 prev->cctx = cctx_current;
1214 1500
1215 ++next->usecount; 1501 ++next->usecount;
1216 1502
1217 if (expect_true (!next->cctx)) 1503 cctx_prev = cctx_current;
1218 next->cctx = cctx_get (aTHX); 1504 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1219 1505
1220 has_throw = !!next->throw; 1506 next->cctx = 0;
1221 1507
1222 if (expect_false (prev__cctx != next->cctx)) 1508 if (expect_false (cctx_prev != cctx_current))
1223 { 1509 {
1224 prev__cctx->top_env = PL_top_env; 1510 cctx_prev->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env; 1511 PL_top_env = cctx_current->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1512 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1227 } 1513 }
1228 1514
1229 free_coro_mortal (aTHX); 1515 transfer_tail (aTHX);
1230 UNLOCK;
1231
1232 if (expect_false (has_throw))
1233 {
1234 struct coro *coro = SvSTATE (coro_current);
1235
1236 if (coro->throw)
1237 {
1238 SV *exception = coro->throw;
1239 coro->throw = 0;
1240 sv_setsv (ERRSV, exception);
1241 croak (0);
1242 }
1243 }
1244 } 1516 }
1245} 1517}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251 1518
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1519#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1253#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1520#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254 1521
1255/** high level stuff ********************************************************/ 1522/** high level stuff ********************************************************/
… …
1257static int 1524static int
1258coro_state_destroy (pTHX_ struct coro *coro) 1525coro_state_destroy (pTHX_ struct coro *coro)
1259{ 1526{
1260 if (coro->flags & CF_DESTROYED) 1527 if (coro->flags & CF_DESTROYED)
1261 return 0; 1528 return 0;
1529
1530 if (coro->on_destroy && !PL_dirty)
1531 coro->on_destroy (aTHX_ coro);
1262 1532
1263 coro->flags |= CF_DESTROYED; 1533 coro->flags |= CF_DESTROYED;
1264 1534
1265 if (coro->flags & CF_READY) 1535 if (coro->flags & CF_READY)
1266 { 1536 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1537 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */ 1538 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready; 1539 --coro_nready;
1271 UNLOCK;
1272 } 1540 }
1273 else 1541 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1542 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275 1543
1276 if (coro->mainstack && coro->mainstack != main_mainstack) 1544 if (coro->mainstack
1277 { 1545 && coro->mainstack != main_mainstack
1278 struct coro temp; 1546 && coro->slot
1279 1547 && !PL_dirty)
1280 if (coro->flags & CF_RUNNING)
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282
1283 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro);
1285
1286 coro_destroy (aTHX_ coro); 1548 coro_destruct_perl (aTHX_ coro);
1287
1288 load_perl (aTHX_ &temp);
1289
1290 coro->slot = 0;
1291 }
1292 1549
1293 cctx_destroy (coro->cctx); 1550 cctx_destroy (coro->cctx);
1551 SvREFCNT_dec (coro->startcv);
1294 SvREFCNT_dec (coro->args); 1552 SvREFCNT_dec (coro->args);
1553 SvREFCNT_dec (CORO_THROW);
1295 1554
1296 if (coro->next) coro->next->prev = coro->prev; 1555 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next; 1556 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next; 1557 if (coro == coro_first) coro_first = coro->next;
1299 1558
… …
1337# define MGf_DUP 0 1596# define MGf_DUP 0
1338#endif 1597#endif
1339}; 1598};
1340 1599
1341static void 1600static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1601prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{ 1602{
1344 ta->prev = SvSTATE (prev_sv); 1603 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv); 1604 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta); 1605 TRANSFER_CHECK (*ta);
1347} 1606}
1348 1607
1349static void 1608static void
1350api_transfer (SV *prev_sv, SV *next_sv) 1609api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351{ 1610{
1352 dTHX;
1353 struct transfer_args ta; 1611 struct coro_transfer_args ta;
1354 1612
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1613 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1); 1614 TRANSFER (ta, 1);
1357} 1615}
1358 1616
1617/*****************************************************************************/
1618/* gensub: simple closure generation utility */
1619
1620#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1621
1622/* create a closure from XS, returns a code reference */
1623/* the arg can be accessed via GENSUB_ARG from the callback */
1624/* the callback must use dXSARGS/XSRETURN */
1625static SV *
1626gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1627{
1628 CV *cv = (CV *)newSV (0);
1629
1630 sv_upgrade ((SV *)cv, SVt_PVCV);
1631
1632 CvANON_on (cv);
1633 CvISXSUB_on (cv);
1634 CvXSUB (cv) = xsub;
1635 GENSUB_ARG = arg;
1636
1637 return newRV_noinc ((SV *)cv);
1638}
1639
1359/** Coro ********************************************************************/ 1640/** Coro ********************************************************************/
1360 1641
1361static void 1642INLINE void
1362coro_enq (pTHX_ SV *coro_sv) 1643coro_enq (pTHX_ struct coro *coro)
1363{ 1644{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1645 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1365}
1366 1646
1367static SV * 1647 SvREFCNT_inc_NN (coro->hv);
1648
1649 coro->next_ready = 0;
1650 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1651 ready [1] = coro;
1652}
1653
1654INLINE struct coro *
1368coro_deq (pTHX) 1655coro_deq (pTHX)
1369{ 1656{
1370 int prio; 1657 int prio;
1371 1658
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1659 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1373 if (AvFILLp (coro_ready [prio]) >= 0) 1660 {
1374 return av_shift (coro_ready [prio]); 1661 struct coro **ready = coro_ready [prio];
1662
1663 if (ready [0])
1664 {
1665 struct coro *coro = ready [0];
1666 ready [0] = coro->next_ready;
1667 return coro;
1668 }
1669 }
1375 1670
1376 return 0; 1671 return 0;
1377} 1672}
1378 1673
1379static int 1674static int
1380api_ready (SV *coro_sv) 1675api_ready (pTHX_ SV *coro_sv)
1381{ 1676{
1382 dTHX;
1383 struct coro *coro; 1677 struct coro *coro;
1384 1678 SV *sv_hook;
1385 if (SvROK (coro_sv)) 1679 void (*xs_hook)(void);
1386 coro_sv = SvRV (coro_sv);
1387 1680
1388 coro = SvSTATE (coro_sv); 1681 coro = SvSTATE (coro_sv);
1389 1682
1390 if (coro->flags & CF_READY) 1683 if (coro->flags & CF_READY)
1391 return 0; 1684 return 0;
1392 1685
1393 coro->flags |= CF_READY; 1686 coro->flags |= CF_READY;
1394 1687
1395 LOCK; 1688 sv_hook = coro_nready ? 0 : coro_readyhook;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1689 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1690
1691 coro_enq (aTHX_ coro);
1397 ++coro_nready; 1692 ++coro_nready;
1398 UNLOCK; 1693
1694 if (sv_hook)
1695 {
1696 dSP;
1697
1698 ENTER;
1699 SAVETMPS;
1700
1701 PUSHMARK (SP);
1702 PUTBACK;
1703 call_sv (sv_hook, G_VOID | G_DISCARD);
1704
1705 FREETMPS;
1706 LEAVE;
1707 }
1708
1709 if (xs_hook)
1710 xs_hook ();
1399 1711
1400 return 1; 1712 return 1;
1401} 1713}
1402 1714
1403static int 1715static int
1404api_is_ready (SV *coro_sv) 1716api_is_ready (pTHX_ SV *coro_sv)
1405{ 1717{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1718 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408} 1719}
1409 1720
1410static void 1721/* expects to own a reference to next->hv */
1722INLINE void
1411prepare_schedule (pTHX_ struct transfer_args *ta) 1723prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1412{ 1724{
1413 SV *prev_sv, *next_sv;
1414
1415 for (;;)
1416 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX);
1419
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv))
1422 {
1423 dSP;
1424 UNLOCK;
1425
1426 ENTER;
1427 SAVETMPS;
1428
1429 PUSHMARK (SP);
1430 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1432 SPAGAIN;
1433
1434 FREETMPS;
1435 LEAVE;
1436 continue;
1437 }
1438
1439 ta->next = SvSTATE (next_sv);
1440
1441 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */
1447 continue;
1448 }
1449
1450 --coro_nready;
1451 UNLOCK;
1452 break;
1453 }
1454
1455 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current); 1725 SV *prev_sv = SvRV (coro_current);
1726
1457 ta->prev = SvSTATE (prev_sv); 1727 ta->prev = SvSTATE_hv (prev_sv);
1728 ta->next = next;
1729
1458 TRANSFER_CHECK (*ta); 1730 TRANSFER_CHECK (*ta);
1459 assert (ta->next->flags & CF_READY); 1731
1460 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv); 1732 SvRV_set (coro_current, (SV *)next->hv);
1462 1733
1463 LOCK;
1464 free_coro_mortal (aTHX); 1734 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv; 1735 coro_mortal = prev_sv;
1466 UNLOCK;
1467} 1736}
1468 1737
1469static void 1738static void
1739prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1740{
1741 for (;;)
1742 {
1743 struct coro *next = coro_deq (aTHX);
1744
1745 if (expect_true (next))
1746 {
1747 /* cannot transfer to destroyed coros, skip and look for next */
1748 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1749 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1750 else
1751 {
1752 next->flags &= ~CF_READY;
1753 --coro_nready;
1754
1755 prepare_schedule_to (aTHX_ ta, next);
1756 break;
1757 }
1758 }
1759 else
1760 {
1761 /* nothing to schedule: call the idle handler */
1762 if (SvROK (sv_idle)
1763 && SvOBJECT (SvRV (sv_idle)))
1764 {
1765 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1766 api_ready (aTHX_ SvRV (sv_idle));
1767 --coro_nready;
1768 }
1769 else
1770 {
1771 dSP;
1772
1773 ENTER;
1774 SAVETMPS;
1775
1776 PUSHMARK (SP);
1777 PUTBACK;
1778 call_sv (sv_idle, G_VOID | G_DISCARD);
1779
1780 FREETMPS;
1781 LEAVE;
1782 }
1783 }
1784 }
1785}
1786
1787INLINE void
1470prepare_cede (pTHX_ struct transfer_args *ta) 1788prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471{ 1789{
1472 api_ready (coro_current); 1790 api_ready (aTHX_ coro_current);
1473 prepare_schedule (aTHX_ ta); 1791 prepare_schedule (aTHX_ ta);
1474} 1792}
1475 1793
1794INLINE void
1795prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1796{
1797 SV *prev = SvRV (coro_current);
1798
1799 if (coro_nready)
1800 {
1801 prepare_schedule (aTHX_ ta);
1802 api_ready (aTHX_ prev);
1803 }
1804 else
1805 prepare_nop (aTHX_ ta);
1806}
1807
1808static void
1809api_schedule (pTHX)
1810{
1811 struct coro_transfer_args ta;
1812
1813 prepare_schedule (aTHX_ &ta);
1814 TRANSFER (ta, 1);
1815}
1816
1817static void
1818api_schedule_to (pTHX_ SV *coro_sv)
1819{
1820 struct coro_transfer_args ta;
1821 struct coro *next = SvSTATE (coro_sv);
1822
1823 SvREFCNT_inc_NN (coro_sv);
1824 prepare_schedule_to (aTHX_ &ta, next);
1825}
1826
1476static int 1827static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta) 1828api_cede (pTHX)
1478{ 1829{
1479 if (coro_nready) 1830 struct coro_transfer_args ta;
1480 { 1831
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta); 1832 prepare_cede (aTHX_ &ta);
1483 api_ready (prev); 1833
1834 if (expect_true (ta.prev != ta.next))
1835 {
1836 TRANSFER (ta, 1);
1484 return 1; 1837 return 1;
1485 } 1838 }
1486 else 1839 else
1487 return 0; 1840 return 0;
1488} 1841}
1489 1842
1490static void
1491api_schedule (void)
1492{
1493 dTHX;
1494 struct transfer_args ta;
1495
1496 prepare_schedule (aTHX_ &ta);
1497 TRANSFER (ta, 1);
1498}
1499
1500static int 1843static int
1501api_cede (void) 1844api_cede_notself (pTHX)
1502{ 1845{
1503 dTHX; 1846 if (coro_nready)
1847 {
1504 struct transfer_args ta; 1848 struct coro_transfer_args ta;
1505 1849
1506 prepare_cede (aTHX_ &ta); 1850 prepare_cede_notself (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1); 1851 TRANSFER (ta, 1);
1511 return 1; 1852 return 1;
1512 } 1853 }
1513 else 1854 else
1514 return 0; 1855 return 0;
1515} 1856}
1516 1857
1517static int 1858static void
1518api_cede_notself (void)
1519{
1520 dTHX;
1521 struct transfer_args ta;
1522
1523 if (prepare_cede_notself (aTHX_ &ta))
1524 {
1525 TRANSFER (ta, 1);
1526 return 1;
1527 }
1528 else
1529 return 0;
1530}
1531
1532static void
1533api_trace (SV *coro_sv, int flags) 1859api_trace (pTHX_ SV *coro_sv, int flags)
1534{ 1860{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv); 1861 struct coro *coro = SvSTATE (coro_sv);
1537 1862
1863 if (coro->flags & CF_RUNNING)
1864 croak ("cannot enable tracing on a running coroutine, caught");
1865
1538 if (flags & CC_TRACE) 1866 if (flags & CC_TRACE)
1539 { 1867 {
1540 if (!coro->cctx) 1868 if (!coro->cctx)
1541 coro->cctx = cctx_new (); 1869 coro->cctx = cctx_new_run ();
1542 else if (!(coro->cctx->flags & CC_TRACE)) 1870 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack"); 1871 croak ("cannot enable tracing on coroutine with custom stack, caught");
1544 1872
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1873 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 } 1874 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1875 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 { 1876 {
… …
1553 else 1881 else
1554 coro->slot->runops = RUNOPS_DEFAULT; 1882 coro->slot->runops = RUNOPS_DEFAULT;
1555 } 1883 }
1556} 1884}
1557 1885
1886static void
1887coro_call_on_destroy (pTHX_ struct coro *coro)
1888{
1889 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1890 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1891
1892 if (on_destroyp)
1893 {
1894 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1895
1896 while (AvFILLp (on_destroy) >= 0)
1897 {
1898 dSP; /* don't disturb outer sp */
1899 SV *cb = av_pop (on_destroy);
1900
1901 PUSHMARK (SP);
1902
1903 if (statusp)
1904 {
1905 int i;
1906 AV *status = (AV *)SvRV (*statusp);
1907 EXTEND (SP, AvFILLp (status) + 1);
1908
1909 for (i = 0; i <= AvFILLp (status); ++i)
1910 PUSHs (AvARRAY (status)[i]);
1911 }
1912
1913 PUTBACK;
1914 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1915 }
1916 }
1917}
1918
1919static void
1920slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1921{
1922 int i;
1923 HV *hv = (HV *)SvRV (coro_current);
1924 AV *av = newAV ();
1925
1926 av_extend (av, items - 1);
1927 for (i = 0; i < items; ++i)
1928 av_push (av, SvREFCNT_inc_NN (arg [i]));
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
1950 struct coro *coro = (struct coro *)frame->data;
1951
1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
1965 }
1966
1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2105 SV *data = (SV *)GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
2111}
2112
2113static SV *
2114coro_new_rouse_cb (pTHX)
2115{
2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2120
2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2122 SvREFCNT_dec (data); /* magicext increases the refcount */
2123
2124 SvREFCNT_dec (coro->rouse_cb);
2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
2258 {
2259 /* ampersand-form of call, use @_ instead of stack */
2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2337 slf_cv = cv;
2338
2339 /* we patch the op, and then re-run the whole call */
2340 /* we have to put the same argument on the stack for this to work */
2341 /* and this will be done by pp_restore */
2342 slf_restore.op_next = (OP *)&slf_restore;
2343 slf_restore.op_type = OP_CUSTOM;
2344 slf_restore.op_ppaddr = pp_restore;
2345 slf_restore.op_first = PL_op;
2346
2347 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2348
2349 if (PL_op->op_flags & OPf_STACKED)
2350 {
2351 if (items > slf_arga)
2352 {
2353 slf_arga = items;
2354 free (slf_argv);
2355 slf_argv = malloc (slf_arga * sizeof (SV *));
2356 }
2357
2358 slf_argc = items;
2359
2360 for (i = 0; i < items; ++i)
2361 slf_argv [i] = SvREFCNT_inc (arg [i]);
2362 }
2363 else
2364 slf_argc = 0;
2365
2366 PL_op->op_ppaddr = pp_slf;
2367 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2368
2369 PL_op = (OP *)&slf_restore;
2370}
2371
2372/*****************************************************************************/
2373/* dynamic wind */
2374
2375static void
2376on_enterleave_call (pTHX_ SV *cb)
2377{
2378 dSP;
2379
2380 PUSHSTACK;
2381
2382 PUSHMARK (SP);
2383 PUTBACK;
2384 call_sv (cb, G_VOID | G_DISCARD);
2385 SPAGAIN;
2386
2387 POPSTACK;
2388}
2389
2390static SV *
2391coro_avp_pop_and_free (pTHX_ AV **avp)
2392{
2393 AV *av = *avp;
2394 SV *res = av_pop (av);
2395
2396 if (AvFILLp (av) < 0)
2397 {
2398 *avp = 0;
2399 SvREFCNT_dec (av);
2400 }
2401
2402 return res;
2403}
2404
2405static void
2406coro_pop_on_enter (pTHX_ void *coro)
2407{
2408 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2409 SvREFCNT_dec (cb);
2410}
2411
2412static void
2413coro_pop_on_leave (pTHX_ void *coro)
2414{
2415 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2416 on_enterleave_call (aTHX_ sv_2mortal (cb));
2417}
2418
2419/*****************************************************************************/
2420/* PerlIO::cede */
2421
2422typedef struct
2423{
2424 PerlIOBuf base;
2425 NV next, every;
2426} PerlIOCede;
2427
2428static IV
2429PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432
2433 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2434 self->next = nvtime () + self->every;
2435
2436 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2437}
2438
2439static SV *
2440PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2441{
2442 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2443
2444 return newSVnv (self->every);
2445}
2446
2447static IV
2448PerlIOCede_flush (pTHX_ PerlIO *f)
2449{
2450 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2451 double now = nvtime ();
2452
2453 if (now >= self->next)
2454 {
2455 api_cede (aTHX);
2456 self->next = now + self->every;
2457 }
2458
2459 return PerlIOBuf_flush (aTHX_ f);
2460}
2461
2462static PerlIO_funcs PerlIO_cede =
2463{
2464 sizeof(PerlIO_funcs),
2465 "cede",
2466 sizeof(PerlIOCede),
2467 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2468 PerlIOCede_pushed,
2469 PerlIOBuf_popped,
2470 PerlIOBuf_open,
2471 PerlIOBase_binmode,
2472 PerlIOCede_getarg,
2473 PerlIOBase_fileno,
2474 PerlIOBuf_dup,
2475 PerlIOBuf_read,
2476 PerlIOBuf_unread,
2477 PerlIOBuf_write,
2478 PerlIOBuf_seek,
2479 PerlIOBuf_tell,
2480 PerlIOBuf_close,
2481 PerlIOCede_flush,
2482 PerlIOBuf_fill,
2483 PerlIOBase_eof,
2484 PerlIOBase_error,
2485 PerlIOBase_clearerr,
2486 PerlIOBase_setlinebuf,
2487 PerlIOBuf_get_base,
2488 PerlIOBuf_bufsiz,
2489 PerlIOBuf_get_ptr,
2490 PerlIOBuf_get_cnt,
2491 PerlIOBuf_set_ptrcnt,
2492};
2493
2494/*****************************************************************************/
2495/* Coro::Semaphore & Coro::Signal */
2496
2497static SV *
2498coro_waitarray_new (pTHX_ int count)
2499{
2500 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2501 AV *av = newAV ();
2502 SV **ary;
2503
2504 /* unfortunately, building manually saves memory */
2505 Newx (ary, 2, SV *);
2506 AvALLOC (av) = ary;
2507#if PERL_VERSION_ATLEAST (5,10,0)
2508 AvARRAY (av) = ary;
2509#else
2510 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2511 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2512 SvPVX ((SV *)av) = (char *)ary;
2513#endif
2514 AvMAX (av) = 1;
2515 AvFILLp (av) = 0;
2516 ary [0] = newSViv (count);
2517
2518 return newRV_noinc ((SV *)av);
2519}
2520
2521/* semaphore */
2522
2523static void
2524coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2525{
2526 SV *count_sv = AvARRAY (av)[0];
2527 IV count = SvIVX (count_sv);
2528
2529 count += adjust;
2530 SvIVX (count_sv) = count;
2531
2532 /* now wake up as many waiters as are expected to lock */
2533 while (count > 0 && AvFILLp (av) > 0)
2534 {
2535 SV *cb;
2536
2537 /* swap first two elements so we can shift a waiter */
2538 AvARRAY (av)[0] = AvARRAY (av)[1];
2539 AvARRAY (av)[1] = count_sv;
2540 cb = av_shift (av);
2541
2542 if (SvOBJECT (cb))
2543 {
2544 api_ready (aTHX_ cb);
2545 --count;
2546 }
2547 else if (SvTYPE (cb) == SVt_PVCV)
2548 {
2549 dSP;
2550 PUSHMARK (SP);
2551 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2554 }
2555
2556 SvREFCNT_dec (cb);
2557 }
2558}
2559
2560static void
2561coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2562{
2563 /* call $sem->adjust (0) to possibly wake up some other waiters */
2564 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2565}
2566
2567static int
2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2569{
2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
2572
2573 /* if we are about to throw, don't actually acquire the lock, just throw */
2574 if (CORO_THROW)
2575 return 0;
2576 else if (SvIVX (count_sv) > 0)
2577 {
2578 SvSTATE_current->on_destroy = 0;
2579
2580 if (acquire)
2581 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2582 else
2583 coro_semaphore_adjust (aTHX_ av, 0);
2584
2585 return 0;
2586 }
2587 else
2588 {
2589 int i;
2590 /* if we were woken up but can't down, we look through the whole */
2591 /* waiters list and only add us if we aren't in there already */
2592 /* this avoids some degenerate memory usage cases */
2593
2594 for (i = 1; i <= AvFILLp (av); ++i)
2595 if (AvARRAY (av)[i] == SvRV (coro_current))
2596 return 1;
2597
2598 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2599 return 1;
2600 }
2601}
2602
2603static int
2604slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2607}
2608
2609static int
2610slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2611{
2612 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2613}
2614
2615static void
2616slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2617{
2618 AV *av = (AV *)SvRV (arg [0]);
2619
2620 if (SvIVX (AvARRAY (av)[0]) > 0)
2621 {
2622 frame->data = (void *)av;
2623 frame->prepare = prepare_nop;
2624 }
2625 else
2626 {
2627 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2628
2629 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2630 frame->prepare = prepare_schedule;
2631
2632 /* to avoid race conditions when a woken-up coro gets terminated */
2633 /* we arrange for a temporary on_destroy that calls adjust (0) */
2634 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2635 }
2636}
2637
2638static void
2639slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2642 frame->check = slf_check_semaphore_down;
2643}
2644
2645static void
2646slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (items >= 2)
2649 {
2650 /* callback form */
2651 AV *av = (AV *)SvRV (arg [0]);
2652 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2653
2654 av_push (av, SvREFCNT_inc_NN (cb_cv));
2655
2656 if (SvIVX (AvARRAY (av)[0]) > 0)
2657 coro_semaphore_adjust (aTHX_ av, 0);
2658
2659 frame->prepare = prepare_nop;
2660 frame->check = slf_check_nop;
2661 }
2662 else
2663 {
2664 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2665 frame->check = slf_check_semaphore_wait;
2666 }
2667}
2668
2669/* signal */
2670
2671static void
2672coro_signal_wake (pTHX_ AV *av, int count)
2673{
2674 SvIVX (AvARRAY (av)[0]) = 0;
2675
2676 /* now signal count waiters */
2677 while (count > 0 && AvFILLp (av) > 0)
2678 {
2679 SV *cb;
2680
2681 /* swap first two elements so we can shift a waiter */
2682 cb = AvARRAY (av)[0];
2683 AvARRAY (av)[0] = AvARRAY (av)[1];
2684 AvARRAY (av)[1] = cb;
2685
2686 cb = av_shift (av);
2687
2688 if (SvTYPE (cb) == SVt_PVCV)
2689 {
2690 dSP;
2691 PUSHMARK (SP);
2692 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2693 PUTBACK;
2694 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2695 }
2696 else
2697 {
2698 api_ready (aTHX_ cb);
2699 sv_setiv (cb, 0); /* signal waiter */
2700 }
2701
2702 SvREFCNT_dec (cb);
2703
2704 --count;
2705 }
2706}
2707
2708static int
2709slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2710{
2711 /* if we are about to throw, also stop waiting */
2712 return SvROK ((SV *)frame->data) && !CORO_THROW;
2713}
2714
2715static void
2716slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 AV *av = (AV *)SvRV (arg [0]);
2719
2720 if (items >= 2)
2721 {
2722 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]))
2726 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else if (SvIVX (AvARRAY (av)[0]))
2732 {
2733 SvIVX (AvARRAY (av)[0]) = 0;
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2740
2741 av_push (av, waiter);
2742
2743 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2744 frame->prepare = prepare_schedule;
2745 frame->check = slf_check_signal_wait;
2746 }
2747}
2748
2749/*****************************************************************************/
2750/* Coro::AIO */
2751
2752#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2753
2754/* helper storage struct */
2755struct io_state
2756{
2757 int errorno;
2758 I32 laststype; /* U16 in 5.10.0 */
2759 int laststatval;
2760 Stat_t statcache;
2761};
2762
2763static void
2764coro_aio_callback (pTHX_ CV *cv)
2765{
2766 dXSARGS;
2767 AV *state = (AV *)GENSUB_ARG;
2768 SV *coro = av_pop (state);
2769 SV *data_sv = newSV (sizeof (struct io_state));
2770
2771 av_extend (state, items - 1);
2772
2773 sv_upgrade (data_sv, SVt_PV);
2774 SvCUR_set (data_sv, sizeof (struct io_state));
2775 SvPOK_only (data_sv);
2776
2777 {
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 data->errorno = errno;
2781 data->laststype = PL_laststype;
2782 data->laststatval = PL_laststatval;
2783 data->statcache = PL_statcache;
2784 }
2785
2786 /* now build the result vector out of all the parameters and the data_sv */
2787 {
2788 int i;
2789
2790 for (i = 0; i < items; ++i)
2791 av_push (state, SvREFCNT_inc_NN (ST (i)));
2792 }
2793
2794 av_push (state, data_sv);
2795
2796 api_ready (aTHX_ coro);
2797 SvREFCNT_dec (coro);
2798 SvREFCNT_dec ((AV *)state);
2799}
2800
2801static int
2802slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2803{
2804 AV *state = (AV *)frame->data;
2805
2806 /* if we are about to throw, return early */
2807 /* this does not cancel the aio request, but at least */
2808 /* it quickly returns */
2809 if (CORO_THROW)
2810 return 0;
2811
2812 /* one element that is an RV? repeat! */
2813 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2814 return 1;
2815
2816 /* restore status */
2817 {
2818 SV *data_sv = av_pop (state);
2819 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2820
2821 errno = data->errorno;
2822 PL_laststype = data->laststype;
2823 PL_laststatval = data->laststatval;
2824 PL_statcache = data->statcache;
2825
2826 SvREFCNT_dec (data_sv);
2827 }
2828
2829 /* push result values */
2830 {
2831 dSP;
2832 int i;
2833
2834 EXTEND (SP, AvFILLp (state) + 1);
2835 for (i = 0; i <= AvFILLp (state); ++i)
2836 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2837
2838 PUTBACK;
2839 }
2840
2841 return 0;
2842}
2843
2844static void
2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2846{
2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2848 SV *coro_hv = SvRV (coro_current);
2849 struct coro *coro = SvSTATE_hv (coro_hv);
2850
2851 /* put our coroutine id on the state arg */
2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
2853
2854 /* first see whether we have a non-zero priority and set it as AIO prio */
2855 if (coro->prio)
2856 {
2857 dSP;
2858
2859 static SV *prio_cv;
2860 static SV *prio_sv;
2861
2862 if (expect_false (!prio_cv))
2863 {
2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2865 prio_sv = newSViv (0);
2866 }
2867
2868 PUSHMARK (SP);
2869 sv_setiv (prio_sv, coro->prio);
2870 XPUSHs (prio_sv);
2871
2872 PUTBACK;
2873 call_sv (prio_cv, G_VOID | G_DISCARD);
2874 }
2875
2876 /* now call the original request */
2877 {
2878 dSP;
2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2880 int i;
2881
2882 PUSHMARK (SP);
2883
2884 /* first push all args to the stack */
2885 EXTEND (SP, items + 1);
2886
2887 for (i = 0; i < items; ++i)
2888 PUSHs (arg [i]);
2889
2890 /* now push the callback closure */
2891 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2892
2893 /* now call the AIO function - we assume our request is uncancelable */
2894 PUTBACK;
2895 call_sv ((SV *)req, G_VOID | G_DISCARD);
2896 }
2897
2898 /* now that the requets is going, we loop toll we have a result */
2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
2902}
2903
2904static void
2905coro_aio_req_xs (pTHX_ CV *cv)
2906{
2907 dXSARGS;
2908
2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2910
2911 XSRETURN_EMPTY;
2912}
2913
2914/*****************************************************************************/
2915
2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
2919
1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2920MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559 2921
1560PROTOTYPES: DISABLE 2922PROTOTYPES: DISABLE
1561 2923
1562BOOT: 2924BOOT:
1563{ 2925{
1564#ifdef USE_ITHREADS 2926#ifdef USE_ITHREADS
1565 MUTEX_INIT (&coro_mutex); 2927# if CORO_PTHREAD
2928 coro_thx = PERL_GET_CONTEXT;
2929# endif
1566#endif 2930#endif
1567 BOOT_PAGESIZE; 2931 BOOT_PAGESIZE;
2932
2933 cctx_current = cctx_new_empty ();
1568 2934
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2935 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2936 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571 2937
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2938 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1573 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2939 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1574 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2940 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1575 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576 2941
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2942 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2943 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2944 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580 2945
… …
1589 main_top_env = PL_top_env; 2954 main_top_env = PL_top_env;
1590 2955
1591 while (main_top_env->je_prev) 2956 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev; 2957 main_top_env = main_top_env->je_prev;
1593 2958
2959 {
2960 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2961
2962 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2963 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2964
2965 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2966 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2967 }
2968
1594 coroapi.ver = CORO_API_VERSION; 2969 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION; 2970 coroapi.rev = CORO_API_REVISION;
2971
1596 coroapi.transfer = api_transfer; 2972 coroapi.transfer = api_transfer;
1597 2973
2974 coroapi.sv_state = SvSTATE_;
2975 coroapi.execute_slf = api_execute_slf;
2976 coroapi.prepare_nop = prepare_nop;
2977 coroapi.prepare_schedule = prepare_schedule;
2978 coroapi.prepare_cede = prepare_cede;
2979 coroapi.prepare_cede_notself = prepare_cede_notself;
2980
2981 {
2982 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2983
2984 if (!svp) croak ("Time::HiRes is required");
2985 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2986
2987 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2988 }
2989
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2990 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1599} 2991}
1600 2992
1601SV * 2993SV *
1602new (char *klass, ...) 2994new (char *klass, ...)
2995 ALIAS:
2996 Coro::new = 1
1603 CODE: 2997 CODE:
1604{ 2998{
1605 struct coro *coro; 2999 struct coro *coro;
1606 MAGIC *mg; 3000 MAGIC *mg;
1607 HV *hv; 3001 HV *hv;
3002 CV *cb;
1608 int i; 3003 int i;
3004
3005 if (items > 1)
3006 {
3007 cb = coro_sv_2cv (aTHX_ ST (1));
3008
3009 if (!ix)
3010 {
3011 if (CvISXSUB (cb))
3012 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3013
3014 if (!CvROOT (cb))
3015 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3016 }
3017 }
1609 3018
1610 Newz (0, coro, 1, struct coro); 3019 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV (); 3020 coro->args = newAV ();
1612 coro->flags = CF_NEW; 3021 coro->flags = CF_NEW;
1613 3022
… …
1618 coro->hv = hv = newHV (); 3027 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 3028 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP; 3029 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622 3031
3032 if (items > 1)
3033 {
1623 av_extend (coro->args, items - 1); 3034 av_extend (coro->args, items - 1 + ix - 1);
3035
3036 if (ix)
3037 {
3038 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3039 cb = cv_coro_run;
3040 }
3041
3042 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3043
1624 for (i = 1; i < items; i++) 3044 for (i = 2; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i))); 3045 av_push (coro->args, newSVsv (ST (i)));
3046 }
1626} 3047}
1627 OUTPUT: 3048 OUTPUT:
1628 RETVAL 3049 RETVAL
1629 3050
1630# these not obviously related functions are all rolled into the same xs
1631# function to increase chances that they all will call transfer with the same
1632# stack offset
1633void 3051void
1634_set_stacklevel (...) 3052transfer (...)
1635 ALIAS: 3053 PROTOTYPE: $$
1636 Coro::State::transfer = 1 3054 CODE:
1637 Coro::schedule = 2 3055 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1638 Coro::cede = 3
1639 Coro::cede_notself = 4
1640 CODE:
1641{
1642 struct transfer_args ta;
1643
1644 PUTBACK;
1645 switch (ix)
1646 {
1647 case 0:
1648 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649 ta.next = 0;
1650 break;
1651
1652 case 1:
1653 if (items != 2)
1654 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657 break;
1658
1659 case 2:
1660 prepare_schedule (aTHX_ &ta);
1661 break;
1662
1663 case 3:
1664 prepare_cede (aTHX_ &ta);
1665 break;
1666
1667 case 4:
1668 if (!prepare_cede_notself (aTHX_ &ta))
1669 XSRETURN_EMPTY;
1670
1671 break;
1672 }
1673 SPAGAIN;
1674
1675 BARRIER;
1676 PUTBACK;
1677 TRANSFER (ta, 0);
1678 SPAGAIN; /* might be the sp of a different coroutine now */
1679 /* be extra careful not to ever do anything after TRANSFER */
1680}
1681 3056
1682bool 3057bool
1683_destroy (SV *coro_sv) 3058_destroy (SV *coro_sv)
1684 CODE: 3059 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3060 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT: 3061 OUTPUT:
1687 RETVAL 3062 RETVAL
1688 3063
1689void 3064void
1690_exit (code) 3065_exit (int code)
1691 int code
1692 PROTOTYPE: $ 3066 PROTOTYPE: $
1693 CODE: 3067 CODE:
1694 _exit (code); 3068 _exit (code);
1695 3069
3070SV *
3071clone (Coro::State coro)
3072 CODE:
3073{
3074#if CORO_CLONE
3075 struct coro *ncoro = coro_clone (aTHX_ coro);
3076 MAGIC *mg;
3077 /* TODO: too much duplication */
3078 ncoro->hv = newHV ();
3079 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3080 mg->mg_flags |= MGf_DUP;
3081 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3082#else
3083 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3084#endif
3085}
3086 OUTPUT:
3087 RETVAL
3088
1696int 3089int
1697cctx_stacksize (int new_stacksize = 0) 3090cctx_stacksize (int new_stacksize = 0)
3091 PROTOTYPE: ;$
1698 CODE: 3092 CODE:
1699 RETVAL = coro_stacksize; 3093 RETVAL = cctx_stacksize;
1700 if (new_stacksize) 3094 if (new_stacksize)
3095 {
1701 coro_stacksize = new_stacksize; 3096 cctx_stacksize = new_stacksize;
3097 ++cctx_gen;
3098 }
1702 OUTPUT: 3099 OUTPUT:
1703 RETVAL 3100 RETVAL
1704 3101
1705int 3102int
3103cctx_max_idle (int max_idle = 0)
3104 PROTOTYPE: ;$
3105 CODE:
3106 RETVAL = cctx_max_idle;
3107 if (max_idle > 1)
3108 cctx_max_idle = max_idle;
3109 OUTPUT:
3110 RETVAL
3111
3112int
1706cctx_count () 3113cctx_count ()
3114 PROTOTYPE:
1707 CODE: 3115 CODE:
1708 RETVAL = cctx_count; 3116 RETVAL = cctx_count;
1709 OUTPUT: 3117 OUTPUT:
1710 RETVAL 3118 RETVAL
1711 3119
1712int 3120int
1713cctx_idle () 3121cctx_idle ()
3122 PROTOTYPE:
1714 CODE: 3123 CODE:
1715 RETVAL = cctx_idle; 3124 RETVAL = cctx_idle;
1716 OUTPUT: 3125 OUTPUT:
1717 RETVAL 3126 RETVAL
1718 3127
1719void 3128void
1720list () 3129list ()
3130 PROTOTYPE:
1721 PPCODE: 3131 PPCODE:
1722{ 3132{
1723 struct coro *coro; 3133 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next) 3134 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv) 3135 if (coro->hv)
… …
1730call (Coro::State coro, SV *coderef) 3140call (Coro::State coro, SV *coderef)
1731 ALIAS: 3141 ALIAS:
1732 eval = 1 3142 eval = 1
1733 CODE: 3143 CODE:
1734{ 3144{
1735 if (coro->mainstack) 3145 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736 { 3146 {
1737 struct coro temp; 3147 struct coro *current = SvSTATE_current;
1738 3148
1739 if (!(coro->flags & CF_RUNNING)) 3149 if (current != coro)
1740 { 3150 {
1741 PUTBACK; 3151 PUTBACK;
1742 save_perl (aTHX_ &temp); 3152 save_perl (aTHX_ current);
1743 load_perl (aTHX_ coro); 3153 load_perl (aTHX_ coro);
3154 SPAGAIN;
1744 } 3155 }
1745 3156
1746 {
1747 dSP;
1748 ENTER;
1749 SAVETMPS;
1750 PUTBACK;
1751 PUSHSTACK; 3157 PUSHSTACK;
3158
1752 PUSHMARK (SP); 3159 PUSHMARK (SP);
3160 PUTBACK;
1753 3161
1754 if (ix) 3162 if (ix)
1755 eval_sv (coderef, 0); 3163 eval_sv (coderef, 0);
1756 else 3164 else
1757 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3165 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1758 3166
1759 POPSTACK; 3167 POPSTACK;
1760 SPAGAIN; 3168 SPAGAIN;
1761 FREETMPS;
1762 LEAVE;
1763 PUTBACK;
1764 }
1765 3169
1766 if (!(coro->flags & CF_RUNNING)) 3170 if (current != coro)
1767 { 3171 {
3172 PUTBACK;
1768 save_perl (aTHX_ coro); 3173 save_perl (aTHX_ coro);
1769 load_perl (aTHX_ &temp); 3174 load_perl (aTHX_ current);
1770 SPAGAIN; 3175 SPAGAIN;
1771 } 3176 }
1772 } 3177 }
1773} 3178}
1774 3179
… …
1778 ALIAS: 3183 ALIAS:
1779 is_ready = CF_READY 3184 is_ready = CF_READY
1780 is_running = CF_RUNNING 3185 is_running = CF_RUNNING
1781 is_new = CF_NEW 3186 is_new = CF_NEW
1782 is_destroyed = CF_DESTROYED 3187 is_destroyed = CF_DESTROYED
3188 is_suspended = CF_SUSPENDED
1783 CODE: 3189 CODE:
1784 RETVAL = boolSV (coro->flags & ix); 3190 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT: 3191 OUTPUT:
1786 RETVAL 3192 RETVAL
1787 3193
1788void 3194void
3195throw (Coro::State self, SV *throw = &PL_sv_undef)
3196 PROTOTYPE: $;$
3197 CODE:
3198{
3199 struct coro *current = SvSTATE_current;
3200 SV **throwp = self == current ? &CORO_THROW : &self->except;
3201 SvREFCNT_dec (*throwp);
3202 SvGETMAGIC (throw);
3203 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3204}
3205
3206void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3207api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3208 PROTOTYPE: $;$
3209 C_ARGS: aTHX_ coro, flags
1790 3210
1791SV * 3211SV *
1792has_stack (Coro::State coro) 3212has_cctx (Coro::State coro)
1793 PROTOTYPE: $ 3213 PROTOTYPE: $
1794 CODE: 3214 CODE:
1795 RETVAL = boolSV (!!coro->cctx); 3215 /* maybe manage the running flag differently */
3216 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1796 OUTPUT: 3217 OUTPUT:
1797 RETVAL 3218 RETVAL
1798 3219
1799int 3220int
1800is_traced (Coro::State coro) 3221is_traced (Coro::State coro)
… …
1802 CODE: 3223 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3224 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT: 3225 OUTPUT:
1805 RETVAL 3226 RETVAL
1806 3227
1807IV 3228UV
1808rss (Coro::State coro) 3229rss (Coro::State coro)
1809 PROTOTYPE: $ 3230 PROTOTYPE: $
1810 ALIAS: 3231 ALIAS:
1811 usecount = 1 3232 usecount = 1
1812 CODE: 3233 CODE:
… …
1818 OUTPUT: 3239 OUTPUT:
1819 RETVAL 3240 RETVAL
1820 3241
1821void 3242void
1822force_cctx () 3243force_cctx ()
3244 PROTOTYPE:
1823 CODE: 3245 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0; 3246 cctx_current->idle_sp = 0;
3247
3248void
3249swap_defsv (Coro::State self)
3250 PROTOTYPE: $
3251 ALIAS:
3252 swap_defav = 1
3253 CODE:
3254 if (!self->slot)
3255 croak ("cannot swap state with coroutine that has no saved state,");
3256 else
3257 {
3258 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3259 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3260
3261 SV *tmp = *src; *src = *dst; *dst = tmp;
3262 }
3263
3264void
3265cancel (Coro::State self)
3266 CODE:
3267 coro_state_destroy (aTHX_ self);
3268 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3269
1826 3270
1827MODULE = Coro::State PACKAGE = Coro 3271MODULE = Coro::State PACKAGE = Coro
1828 3272
1829BOOT: 3273BOOT:
1830{ 3274{
1831 int i;
1832
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3275 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3276 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3277 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3278 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3279 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3280 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3281 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3282 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3283 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1836 3284
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3285 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1838 SvREADONLY_on (coro_current); 3286 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3287 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3288 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1839 3289
1840 coro_stash = gv_stashpv ("Coro", TRUE); 3290 coro_stash = gv_stashpv ("Coro", TRUE);
1841 3291
1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3292 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3293 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1844 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3294 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1845 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3295 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1846 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3296 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1847 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3297 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1848
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV ();
1851 3298
1852 { 3299 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE); 3300 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855 3301
1856 coroapi.schedule = api_schedule; 3302 coroapi.schedule = api_schedule;
3303 coroapi.schedule_to = api_schedule_to;
1857 coroapi.cede = api_cede; 3304 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself; 3305 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready; 3306 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready; 3307 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready; 3308 coroapi.nready = coro_nready;
1862 coroapi.current = coro_current; 3309 coroapi.current = coro_current;
1863 3310
1864 GCoroAPI = &coroapi; 3311 /*GCoroAPI = &coroapi;*/
1865 sv_setiv (sv, (IV)&coroapi); 3312 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv); 3313 SvREADONLY_on (sv);
1867 } 3314 }
1868} 3315}
3316
3317void
3318terminate (...)
3319 CODE:
3320 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3321
3322void
3323schedule (...)
3324 CODE:
3325 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3326
3327void
3328schedule_to (...)
3329 CODE:
3330 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3331
3332void
3333cede_to (...)
3334 CODE:
3335 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3336
3337void
3338cede (...)
3339 CODE:
3340 CORO_EXECUTE_SLF_XS (slf_init_cede);
3341
3342void
3343cede_notself (...)
3344 CODE:
3345 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1869 3346
1870void 3347void
1871_set_current (SV *current) 3348_set_current (SV *current)
1872 PROTOTYPE: $ 3349 PROTOTYPE: $
1873 CODE: 3350 CODE:
1874 SvREFCNT_dec (SvRV (coro_current)); 3351 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3352 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3353
3354void
3355_set_readyhook (SV *hook)
3356 PROTOTYPE: $
3357 CODE:
3358 SvREFCNT_dec (coro_readyhook);
3359 SvGETMAGIC (hook);
3360 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1876 3361
1877int 3362int
1878prio (Coro::State coro, int newprio = 0) 3363prio (Coro::State coro, int newprio = 0)
3364 PROTOTYPE: $;$
1879 ALIAS: 3365 ALIAS:
1880 nice = 1 3366 nice = 1
1881 CODE: 3367 CODE:
1882{ 3368{
1883 RETVAL = coro->prio; 3369 RETVAL = coro->prio;
… …
1885 if (items > 1) 3371 if (items > 1)
1886 { 3372 {
1887 if (ix) 3373 if (ix)
1888 newprio = coro->prio - newprio; 3374 newprio = coro->prio - newprio;
1889 3375
1890 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3376 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1891 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3377 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1892 3378
1893 coro->prio = newprio; 3379 coro->prio = newprio;
1894 } 3380 }
1895} 3381}
1896 OUTPUT: 3382 OUTPUT:
… …
1898 3384
1899SV * 3385SV *
1900ready (SV *self) 3386ready (SV *self)
1901 PROTOTYPE: $ 3387 PROTOTYPE: $
1902 CODE: 3388 CODE:
1903 RETVAL = boolSV (api_ready (self)); 3389 RETVAL = boolSV (api_ready (aTHX_ self));
1904 OUTPUT: 3390 OUTPUT:
1905 RETVAL 3391 RETVAL
1906 3392
1907int 3393int
1908nready (...) 3394nready (...)
… …
1911 RETVAL = coro_nready; 3397 RETVAL = coro_nready;
1912 OUTPUT: 3398 OUTPUT:
1913 RETVAL 3399 RETVAL
1914 3400
1915void 3401void
1916throw (Coro::State self, SV *throw = &PL_sv_undef) 3402suspend (Coro::State self)
1917 PROTOTYPE: $;$ 3403 PROTOTYPE: $
3404 CODE:
3405 self->flags |= CF_SUSPENDED;
3406
3407void
3408resume (Coro::State self)
3409 PROTOTYPE: $
3410 CODE:
3411 self->flags &= ~CF_SUSPENDED;
3412
3413void
3414_pool_handler (...)
3415 CODE:
3416 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3417
3418void
3419async_pool (SV *cv, ...)
3420 PROTOTYPE: &@
3421 PPCODE:
3422{
3423 HV *hv = (HV *)av_pop (av_async_pool);
3424 AV *av = newAV ();
3425 SV *cb = ST (0);
3426 int i;
3427
3428 av_extend (av, items - 2);
3429 for (i = 1; i < items; ++i)
3430 av_push (av, SvREFCNT_inc_NN (ST (i)));
3431
3432 if ((SV *)hv == &PL_sv_undef)
3433 {
3434 PUSHMARK (SP);
3435 EXTEND (SP, 2);
3436 PUSHs (sv_Coro);
3437 PUSHs ((SV *)cv_pool_handler);
3438 PUTBACK;
3439 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3440 SPAGAIN;
3441
3442 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3443 }
3444
3445 {
3446 struct coro *coro = SvSTATE_hv (hv);
3447
3448 assert (!coro->invoke_cb);
3449 assert (!coro->invoke_av);
3450 coro->invoke_cb = SvREFCNT_inc (cb);
3451 coro->invoke_av = av;
3452 }
3453
3454 api_ready (aTHX_ (SV *)hv);
3455
3456 if (GIMME_V != G_VOID)
3457 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3458 else
3459 SvREFCNT_dec (hv);
3460}
3461
3462SV *
3463rouse_cb ()
3464 PROTOTYPE:
3465 CODE:
3466 RETVAL = coro_new_rouse_cb (aTHX);
3467 OUTPUT:
3468 RETVAL
3469
3470void
3471rouse_wait (...)
3472 PROTOTYPE: ;$
3473 PPCODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3475
3476void
3477on_enter (SV *block)
3478 ALIAS:
3479 on_leave = 1
3480 PROTOTYPE: &
3481 CODE:
3482{
3483 struct coro *coro = SvSTATE_current;
3484 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3485
3486 block = (SV *)coro_sv_2cv (aTHX_ block);
3487
3488 if (!*avp)
3489 *avp = newAV ();
3490
3491 av_push (*avp, SvREFCNT_inc (block));
3492
3493 if (!ix)
3494 on_enterleave_call (aTHX_ block);
3495
3496 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3497 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3498 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3499}
3500
3501
3502MODULE = Coro::State PACKAGE = PerlIO::cede
3503
3504BOOT:
3505 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3506
3507
3508MODULE = Coro::State PACKAGE = Coro::Semaphore
3509
3510SV *
3511new (SV *klass, SV *count = 0)
3512 CODE:
3513{
3514 int semcnt = 1;
3515
3516 if (count)
3517 {
3518 SvGETMAGIC (count);
3519
3520 if (SvOK (count))
3521 semcnt = SvIV (count);
3522 }
3523
3524 RETVAL = sv_bless (
3525 coro_waitarray_new (aTHX_ semcnt),
3526 GvSTASH (CvGV (cv))
3527 );
3528}
3529 OUTPUT:
3530 RETVAL
3531
3532# helper for Coro::Channel and others
3533SV *
3534_alloc (int count)
3535 CODE:
3536 RETVAL = coro_waitarray_new (aTHX_ count);
3537 OUTPUT:
3538 RETVAL
3539
3540SV *
3541count (SV *self)
3542 CODE:
3543 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3544 OUTPUT:
3545 RETVAL
3546
3547void
3548up (SV *self, int adjust = 1)
3549 ALIAS:
3550 adjust = 1
1918 CODE: 3551 CODE:
1919 SvREFCNT_dec (self->throw); 3552 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921 3553
1922void 3554void
1923swap_defsv (Coro::State self) 3555down (...)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE: 3556 CODE:
1928 if (!self->slot) 3557 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1929 croak ("cannot swap state with coroutine that has no saved state"); 3558
3559void
3560wait (...)
3561 CODE:
3562 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3563
3564void
3565try (SV *self)
3566 PPCODE:
3567{
3568 AV *av = (AV *)SvRV (self);
3569 SV *count_sv = AvARRAY (av)[0];
3570 IV count = SvIVX (count_sv);
3571
3572 if (count > 0)
3573 {
3574 --count;
3575 SvIVX (count_sv) = count;
3576 XSRETURN_YES;
3577 }
3578 else
3579 XSRETURN_NO;
3580}
3581
3582void
3583waiters (SV *self)
3584 PPCODE:
3585{
3586 AV *av = (AV *)SvRV (self);
3587 int wcount = AvFILLp (av) + 1 - 1;
3588
3589 if (GIMME_V == G_SCALAR)
3590 XPUSHs (sv_2mortal (newSViv (wcount)));
1930 else 3591 else
1931 { 3592 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3593 int i;
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3594 EXTEND (SP, wcount);
1934 3595 for (i = 1; i <= wcount; ++i)
1935 SV *tmp = *src; *src = *dst; *dst = tmp; 3596 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1936 } 3597 }
3598}
1937 3599
1938# for async_pool speedup 3600MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3601
1939void 3602void
1940_pool_1 (SV *cb) 3603_may_delete (SV *sem, int count, int extra_refs)
3604 PPCODE:
3605{
3606 AV *av = (AV *)SvRV (sem);
3607
3608 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3609 && AvFILLp (av) == 0 /* no waiters, just count */
3610 && SvIV (AvARRAY (av)[0]) == count)
3611 XSRETURN_YES;
3612
3613 XSRETURN_NO;
3614}
3615
3616MODULE = Coro::State PACKAGE = Coro::Signal
3617
3618SV *
3619new (SV *klass)
1941 CODE: 3620 CODE:
1942{ 3621 RETVAL = sv_bless (
1943 struct coro *coro = SvSTATE (coro_current); 3622 coro_waitarray_new (aTHX_ 0),
1944 HV *hv = (HV *)SvRV (coro_current); 3623 GvSTASH (CvGV (cv))
1945 AV *defav = GvAV (PL_defgv); 3624 );
1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 3625 OUTPUT:
1947 AV *invoke_av; 3626 RETVAL
1948 int i, len;
1949
1950 if (!invoke)
1951 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1953 croak ("\3async_pool terminate\2\n");
1954 }
1955
1956 SvREFCNT_dec (coro->saved_deffh);
1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1958
1959 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961
1962 invoke_av = (AV *)SvRV (invoke);
1963 len = av_len (invoke_av);
1964
1965 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1966
1967 if (len > 0)
1968 {
1969 av_fill (defav, len - 1);
1970 for (i = 0; i < len; ++i)
1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1972 }
1973
1974 SvREFCNT_dec (invoke);
1975}
1976 3627
1977void 3628void
1978_pool_2 (SV *cb) 3629wait (...)
3630 CODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3632
3633void
3634broadcast (SV *self)
3635 CODE:
3636{
3637 AV *av = (AV *)SvRV (self);
3638 coro_signal_wake (aTHX_ av, AvFILLp (av));
3639}
3640
3641void
3642send (SV *self)
3643 CODE:
3644{
3645 AV *av = (AV *)SvRV (self);
3646
3647 if (AvFILLp (av))
3648 coro_signal_wake (aTHX_ av, 1);
3649 else
3650 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3651}
3652
3653IV
3654awaited (SV *self)
1979 CODE: 3655 CODE:
1980{ 3656 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1981 struct coro *coro = SvSTATE (coro_current);
1982
1983 sv_setsv (cb, &PL_sv_undef);
1984
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0;
1987
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1992 croak ("\3async_pool terminate\2\n");
1993 }
1994
1995 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0);
2003
2004 av_push (av_async_pool, newSVsv (coro_current));
2005}
2006
2007
2008MODULE = Coro::State PACKAGE = Coro::AIO
2009
2010SV *
2011_get_state ()
2012 CODE:
2013{
2014 struct io_state *data;
2015
2016 RETVAL = newSV (sizeof (struct io_state));
2017 data = (struct io_state *)SvPVX (RETVAL);
2018 SvCUR_set (RETVAL, sizeof (struct io_state));
2019 SvPOK_only (RETVAL);
2020
2021 data->errorno = errno;
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025}
2026 OUTPUT: 3657 OUTPUT:
2027 RETVAL 3658 RETVAL
2028 3659
3660
3661MODULE = Coro::State PACKAGE = Coro::AnyEvent
3662
3663BOOT:
3664 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3665
2029void 3666void
2030_set_state (char *data_) 3667_schedule (...)
2031 PROTOTYPE: $
2032 CODE: 3668 CODE:
2033{ 3669{
2034 struct io_state *data = (void *)data_; 3670 static int incede;
2035 3671
2036 errno = data->errorno; 3672 api_cede_notself (aTHX);
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041 3673
3674 ++incede;
3675 while (coro_nready >= incede && api_cede (aTHX))
3676 ;
3677
3678 sv_setsv (sv_activity, &PL_sv_undef);
3679 if (coro_nready >= incede)
3680 {
3681 PUSHMARK (SP);
3682 PUTBACK;
3683 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3684 }
3685
3686 --incede;
3687}
3688
3689
3690MODULE = Coro::State PACKAGE = Coro::AIO
3691
3692void
3693_register (char *target, char *proto, SV *req)
3694 CODE:
3695{
3696 CV *req_cv = coro_sv_2cv (aTHX_ req);
3697 /* newXSproto doesn't return the CV on 5.8 */
3698 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3699 sv_setpv ((SV *)slf_cv, proto);
3700 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3701}
3702

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