ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.209 by root, Wed Oct 10 02:58:17 2007 UTC vs.
Revision 1.356 by root, Sat Jun 27 14:06:59 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>
14#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
15#include <inttypes.h> /* portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif
16 25
17#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
18# include <unistd.h> 27# include <unistd.h>
19# include <sys/mman.h> 28# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
38#endif 47#endif
39 48
40#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 51#endif
46 52
47/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
49 55
50#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
55 61
56#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr 63# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
59# endif 65# endif
… …
72# ifndef IS_PADCONST 78# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
74# endif 80# endif
75#endif 81#endif
76 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
77/* 5.8.7 */ 110/* 5.8.7 */
78#ifndef SvRV_set 111#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
80#endif 113#endif
81 114
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 116# undef CORO_STACKGUARD
92#endif 117#endif
93 118
94#ifndef CORO_STACKGUARD 119#ifndef CORO_STACKGUARD
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 126#endif
102 127
103/* 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
104 * 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
105#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
106#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
107 137
108#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
109 139
110#if __GNUC__ >= 3 140#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
114#else 144#else
115# define attribute(x) 145# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr) 146# define expect(expr,value) (expr)
147# define INLINE static
118#endif 148#endif
119 149
120#define expect_false(expr) expect ((expr) != 0, 0) 150#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1) 151#define expect_true(expr) expect ((expr) != 0, 1)
122 152
123#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
124 154
125#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
126 157
127#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 159# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 161# endif
162#endif
135 163
136#define strpair(const) const, sizeof (const) - 1 164static double (*nvtime)(); /* so why doesn't it take void? */
137 165
138/* helper storage struct for Coro::AIO */ 166/* we hijack an hopefully unused CV flag for our purposes */
139struct io_state 167#define CVf_SLF 0x4000
140{ 168static OP *pp_slf (pTHX);
141 int errorno;
142 I32 laststype;
143 int laststatval;
144 Stat_t statcache;
145};
146 169
170static U32 cctx_gen;
147static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
148static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
149static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
150static JMPENV *main_top_env; 174static JMPENV *main_top_env;
151static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
152static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
153 181
154static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
155static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
156 184static SV *rv_diehook;
185static SV *rv_warnhook;
157static HV *hv_sig; /* %SIG */ 186static HV *hv_sig; /* %SIG */
158static SV *sv_diehook;
159static SV *sv_warnhook;
160 187
161/* async_pool helper stuff */ 188/* async_pool helper stuff */
162static SV *sv_pool_rss; 189static SV *sv_pool_rss;
163static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
164static AV *av_async_pool; 192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
165 196
166static struct coro_cctx *cctx_first[3]; /* index by GIMME_V type, void, scalar, array */ 197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
167static int cctx_count, cctx_idle[3]; 201static int cctx_count, cctx_idle;
168 202
169enum { 203enum {
170 CC_MAPPED = 0x01, 204 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */ 205 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04, 206 CC_TRACE = 0x04,
… …
174 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176}; 210};
177 211
178/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
179typedef struct coro_cctx { 213typedef struct coro_cctx
214{
180 struct coro_cctx *next; 215 struct coro_cctx *next;
181 216
182 /* the stack */ 217 /* the stack */
183 void *sptr; 218 void *sptr;
184 size_t ssize; 219 size_t ssize;
… …
187 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
188 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
189 JMPENV *top_env; 224 JMPENV *top_env;
190 coro_context cctx; 225 coro_context cctx;
191 226
227 U32 gen;
192#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
193 int valgrind_id; 229 int valgrind_id;
194#endif 230#endif
195 unsigned char flags; 231 unsigned char flags;
196} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
197 237
198enum { 238enum {
199 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
200 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
201 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
202 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
203}; 244};
204 245
205/* the structure where most of the perl state is stored, overlaid on the cxstack */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
206typedef struct { 247typedef struct
248{
207 SV *defsv; 249 SV *defsv;
208 AV *defav; 250 AV *defav;
209 SV *errsv; 251 SV *errsv;
210 SV *irsgv; 252 SV *irsgv;
253 HV *hinthv;
211#define VAR(name,type) type name; 254#define VAR(name,type) type name;
212# include "state.h" 255# include "state.h"
213#undef VAR 256#undef VAR
214} perl_slots; 257} perl_slots;
215 258
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217 260
218/* this is a structure representing a perl-level coroutine */ 261/* this is a structure representing a perl-level coroutine */
219struct coro { 262struct coro {
220 /* the c coroutine allocated to this perl coroutine, if any */ 263 /* the C coroutine allocated to this perl coroutine, if any */
221 coro_cctx *cctx; 264 coro_cctx *cctx;
222 int gimme;
223 265
224 /* process data */ 266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
225 AV *mainstack; 271 AV *mainstack;
226 perl_slots *slot; /* basically the saved sp */ 272 perl_slots *slot; /* basically the saved sp */
227 273
274 CV *startcv; /* the CV to execute */
228 AV *args; /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
229 int refcnt; /* coroutines are refcounted, yes */ 276 int refcnt; /* coroutines are refcounted, yes */
230 int flags; /* CF_ flags */ 277 int flags; /* CF_ flags */
231 HV *hv; /* the perl hash associated with this coro, if any */ 278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
232 280
233 /* statistics */ 281 /* statistics */
234 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
235 283
236 /* coro process data */ 284 /* coro process data */
237 int prio; 285 int prio;
238 SV *throw; /* exception to be thrown */ 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
239 288
240 /* async_pool */ 289 /* async_pool */
241 SV *saved_deffh; 290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
242 297
243 /* linked list */ 298 /* linked list */
244 struct coro *next, *prev; 299 struct coro *next, *prev;
245}; 300};
246 301
247typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
248typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
304
305/* the following variables are effectively part of the perl context */
306/* and get copied between struct coro and these variables */
307/* the mainr easonw e don't support windows process emulation */
308static struct CoroSLF slf_frame; /* the current slf frame */
249 309
250/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
251 311
252#define PRIO_MAX 3 312#define PRIO_MAX 3
253#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
256#define PRIO_IDLE -3 316#define PRIO_IDLE -3
257#define PRIO_MIN -4 317#define PRIO_MIN -4
258 318
259/* for Coro.pm */ 319/* for Coro.pm */
260static SV *coro_current; 320static SV *coro_current;
261static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
262static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
263static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
264 326
265/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
266 328
267static SV * 329static SV *
268coro_get_sv (const char *name, int create) 330coro_get_sv (pTHX_ const char *name, int create)
269{ 331{
270#if PERL_VERSION_ATLEAST (5,9,0) 332#if PERL_VERSION_ATLEAST (5,10,0)
271 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
272 get_sv (name, create); 334 get_sv (name, create);
273#endif 335#endif
274 return get_sv (name, create); 336 return get_sv (name, create);
275} 337}
276 338
277static AV * 339static AV *
278coro_get_av (const char *name, int create) 340coro_get_av (pTHX_ const char *name, int create)
279{ 341{
280#if PERL_VERSION_ATLEAST (5,9,0) 342#if PERL_VERSION_ATLEAST (5,10,0)
281 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
282 get_av (name, create); 344 get_av (name, create);
283#endif 345#endif
284 return get_av (name, create); 346 return get_av (name, create);
285} 347}
286 348
287static HV * 349static HV *
288coro_get_hv (const char *name, int create) 350coro_get_hv (pTHX_ const char *name, int create)
289{ 351{
290#if PERL_VERSION_ATLEAST (5,9,0) 352#if PERL_VERSION_ATLEAST (5,10,0)
291 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
292 get_hv (name, create); 354 get_hv (name, create);
293#endif 355#endif
294 return get_hv (name, create); 356 return get_hv (name, create);
295} 357}
296 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
370 return cv;
371}
372
373/*****************************************************************************/
374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
297static AV * 425static AV *
298coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
299{ 427{
300 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
301 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
302 430
303 newpadlist = newAV (); 431 newpadlist = newAV ();
304 AvREAL_off (newpadlist); 432 AvREAL_off (newpadlist);
305#if PERL_VERSION_ATLEAST (5,9,0) 433#if PERL_VERSION_ATLEAST (5,10,0)
306 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
307#else 435#else
308 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
309#endif 437#endif
310 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
311 --AvFILLp (padlist); 439 --AvFILLp (padlist);
312 440
313 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
314 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
315 443
316 return newpadlist; 444 return newpadlist;
317} 445}
318 446
319static void 447static void
320free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
321{ 449{
322 /* may be during global destruction */ 450 /* may be during global destruction */
323 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
324 { 452 {
325 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
326 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
327 { 456 {
328 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
329 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
330 { 459 I32 j = AvFILLp (av);
331 SV *sv; 460
332 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
333 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
334
335 SvREFCNT_dec (*svp);
336 }
337 } 466 }
338 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
339 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
340 } 472 }
341} 473}
342 474
343static int 475static int
… …
348 480
349 /* casting is fun. */ 481 /* casting is fun. */
350 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
351 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
352 484
353 SvREFCNT_dec (av); 485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
354 486
355 return 0; 487 return 0;
356} 488}
357 489
358#define PERL_MAGIC_coro PERL_MAGIC_ext 490static MGVTBL coro_cv_vtbl = {
359 491 0, 0, 0, 0,
360static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 492 coro_cv_free
361 493};
362#define CORO_MAGIC(cv) \
363 SvMAGIC (cv) \
364 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
365 ? SvMAGIC (cv) \
366 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
367 : 0
368
369static struct coro *
370SvSTATE_ (pTHX_ SV *coro)
371{
372 HV *stash;
373 MAGIC *mg;
374
375 if (SvROK (coro))
376 coro = SvRV (coro);
377
378 if (expect_false (SvTYPE (coro) != SVt_PVHV))
379 croak ("Coro::State object required");
380
381 stash = SvSTASH (coro);
382 if (expect_false (stash != coro_stash && stash != coro_state_stash))
383 {
384 /* very slow, but rare, check */
385 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
386 croak ("Coro::State object required");
387 }
388
389 mg = CORO_MAGIC (coro);
390 return (struct coro *)mg->mg_ptr;
391}
392
393#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
394 494
395/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
396static void 496static void
397get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
398{ 498{
399 MAGIC *mg = CORO_MAGIC (cv); 499 MAGIC *mg = CORO_MAGIC_cv (cv);
400 AV *av; 500 AV *av;
401 501
402 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
403 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
404 else 504 else
405 { 505 {
406#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
407 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
408 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
409 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
410 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
411 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
412#else 513#else
413 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
414#endif 515#endif
415 } 516 }
416} 517}
417 518
418static void 519static void
419put_padlist (pTHX_ CV *cv) 520put_padlist (pTHX_ CV *cv)
420{ 521{
421 MAGIC *mg = CORO_MAGIC (cv); 522 MAGIC *mg = CORO_MAGIC_cv (cv);
422 AV *av; 523 AV *av;
423 524
424 if (expect_false (!mg)) 525 if (expect_false (!mg))
425 { 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
426 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
427 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
428 mg->mg_virtual = &vtbl_coro;
429 mg->mg_obj = (SV *)newAV ();
430 }
431 527
432 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
433 529
434 if (expect_false (AvFILLp (av) >= AvMAX (av))) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
435 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
436 532
437 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
438} 534}
439 535
440/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
441 540
442static void 541static void
443load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
444{ 543{
445 perl_slots *slot = c->slot; 544 perl_slots *slot = c->slot;
446 c->slot = 0; 545 c->slot = 0;
447 546
448 PL_mainstack = c->mainstack; 547 PL_mainstack = c->mainstack;
449 548
450 GvSV (PL_defgv) = slot->defsv; 549 GvSV (PL_defgv) = slot->defsv;
451 GvAV (PL_defgv) = slot->defav; 550 GvAV (PL_defgv) = slot->defav;
452 GvSV (PL_errgv) = slot->errsv; 551 GvSV (PL_errgv) = slot->errsv;
453 GvSV (irsgv) = slot->irsgv; 552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
454 554
455 #define VAR(name,type) PL_ ## name = slot->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
456 # include "state.h" 556 # include "state.h"
457 #undef VAR 557 #undef VAR
458
459 /*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
460 /*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
461 558
462 { 559 {
463 dSP; 560 dSP;
464 561
465 CV *cv; 562 CV *cv;
… …
472 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
473 } 570 }
474 571
475 PUTBACK; 572 PUTBACK;
476 } 573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
477} 585}
478 586
479static void 587static void
480save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
481{ 589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
482 { 601 {
483 dSP; 602 dSP;
484 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
485 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
486 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
496 { 615 {
497 while (expect_true (cxix >= 0)) 616 while (expect_true (cxix >= 0))
498 { 617 {
499 PERL_CONTEXT *cx = &ccstk[cxix--]; 618 PERL_CONTEXT *cx = &ccstk[cxix--];
500 619
501 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 620 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
502 { 621 {
503 CV *cv = cx->blk_sub.cv; 622 CV *cv = cx->blk_sub.cv;
504 623
505 if (expect_true (CvDEPTH (cv))) 624 if (expect_true (CvDEPTH (cv)))
506 { 625 {
507 EXTEND (SP, 3); 626 EXTEND (SP, 3);
508 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
509 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
510 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
511 630
512 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
513 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
514 } 633 }
… …
541 c->mainstack = PL_mainstack; 660 c->mainstack = PL_mainstack;
542 661
543 { 662 {
544 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
545 664
546 slot->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
547 slot->defsv = DEFSV; 666 slot->defsv = DEFSV;
548 slot->errsv = ERRSV; 667 slot->errsv = ERRSV;
549 slot->irsgv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
550 670
551 #define VAR(name,type) slot->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
552 # include "state.h" 672 # include "state.h"
553 #undef VAR 673 #undef VAR
554 } 674 }
555} 675}
556 676
557/* 677/*
558 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
559 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
560 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
561 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
562 */ 682 */
563#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
564# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
565#else 685#else
566static void 686static void
567coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
568{ 688{
569 PL_curstackinfo = new_stackinfo(32, 8); 689 PL_curstackinfo = new_stackinfo(32, 8);
… …
594 714
595 New(54,PL_savestack,24,ANY); 715 New(54,PL_savestack,24,ANY);
596 PL_savestack_ix = 0; 716 PL_savestack_ix = 0;
597 PL_savestack_max = 24; 717 PL_savestack_max = 24;
598 718
599#if !PERL_VERSION_ATLEAST (5,9,0) 719#if !PERL_VERSION_ATLEAST (5,10,0)
600 New(54,PL_retstack,4,OP*); 720 New(54,PL_retstack,4,OP*);
601 PL_retstack_ix = 0; 721 PL_retstack_ix = 0;
602 PL_retstack_max = 4; 722 PL_retstack_max = 4;
603#endif 723#endif
604} 724}
… …
606 726
607/* 727/*
608 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
609 */ 729 */
610static void 730static void
611coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
612{ 732{
613 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
614 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
615 735
616 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
627 747
628 Safefree (PL_tmps_stack); 748 Safefree (PL_tmps_stack);
629 Safefree (PL_markstack); 749 Safefree (PL_markstack);
630 Safefree (PL_scopestack); 750 Safefree (PL_scopestack);
631 Safefree (PL_savestack); 751 Safefree (PL_savestack);
632#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
633 Safefree (PL_retstack); 753 Safefree (PL_retstack);
634#endif 754#endif
635} 755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
636 765
637static size_t 766static size_t
638coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
639{ 768{
640 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
641 770
642 if (coro->mainstack) 771 if (coro->mainstack)
643 { 772 {
644 perl_slots tmp_slot;
645 perl_slots *slot;
646
647 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
648 { 774 {
649 slot = &tmp_slot; 775 #define SYM(sym) PL_ ## sym
650 776 CORO_RSS;
651 #define VAR(name,type) slot->name = PL_ ## name;
652 # include "state.h"
653 #undef VAR 777 #undef SYM
654 } 778 }
655 else 779 else
656 slot = coro->slot; 780 {
657 781 #define SYM(sym) coro->slot->sym
658 rss += sizeof (slot->curstackinfo); 782 CORO_RSS;
659 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 783 #undef SYM
660 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 784 }
661 rss += slot->tmps_max * sizeof (SV *);
662 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
663 rss += slot->scopestack_max * sizeof (I32);
664 rss += slot->savestack_max * sizeof (ANY);
665
666#if !PERL_VERSION_ATLEAST (5,9,0)
667 rss += slot->retstack_max * sizeof (OP *);
668#endif
669 } 785 }
670 786
671 return rss; 787 return rss;
672} 788}
673 789
674/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
675 791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
676static void 809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
677coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
678{ 902{
679 /* 903 /*
680 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
681 */ 905 */
… …
683 907
684 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
685 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
686 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
687 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
688 PL_curpm = 0; 915 PL_curpm = 0;
689 PL_curpad = 0; 916 PL_curpad = 0;
690 PL_localizing = 0; 917 PL_localizing = 0;
691 PL_dirty = 0; 918 PL_dirty = 0;
692 PL_restartop = 0; 919 PL_restartop = 0;
693 PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0); 920#if PERL_VERSION_ATLEAST (5,10,0)
694 PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0); 921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
695 928
696 GvSV (PL_defgv) = newSV (0); 929 GvSV (PL_defgv) = newSV (0);
697 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
698 GvSV (PL_errgv) = newSV (0); 931 GvSV (PL_errgv) = newSV (0);
699 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
700 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
701 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
702 936
703 { 937 {
704 dSP; 938 dSP;
705 LOGOP myop; 939 UNOP myop;
706 940
707 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
708 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
709 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
710 945
711 PUSHMARK (SP); 946 PUSHMARK (SP);
712 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 947 PUSHs ((SV *)coro->startcv);
713 PUTBACK; 948 PUTBACK;
714 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
715 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
716 SPAGAIN;
717
718 /*
719 * now its very tricky. the "tail" of the next transfer might end up
720 * either in a new cctx, or an existing one.
721 * in case of an existing one we have to take care of whatever
722 * entersub and transfer do to the perl stack.
723 */
724 ENTER;
725 EXTEND (SP, 4);
726 PUSHs ((SV *)0); /* items */
727 PUSHs ((SV *)0); /* ix, set_stacklevel */
728 PUSHs ((SV *)(sp - PL_stack_base + 1)); /* ax */
729 PUSHs ((SV *)0); /* again */
730 PUTBACK;
731 } 951 }
732}
733 952
953 /* this newly created coroutine might be run on an existing cctx which most
954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
734static void 971static void
735coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
736{ 973{
737 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
738 { 975 {
739 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
740 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
748 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
749 986
750 /* unwind main stack */ 987 /* unwind main stack */
751 dounwind (-1); 988 dounwind (-1);
752 } 989 }
990}
753 991
754 SvREFCNT_dec (GvSV (PL_defgv)); 992static void
755 SvREFCNT_dec (GvAV (PL_defgv)); 993coro_destruct_perl (pTHX_ struct coro *coro)
756 SvREFCNT_dec (GvSV (PL_errgv)); 994{
757 SvREFCNT_dec (PL_defoutgv); 995 SV *svf [9];
758 SvREFCNT_dec (PL_rs);
759 SvREFCNT_dec (GvSV (irsgv));
760 996
761 SvREFCNT_dec (PL_diehook);
762 SvREFCNT_dec (PL_warnhook);
763 997 {
998 struct coro *current = SvSTATE_current;
999
1000 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1001
1002 save_perl (aTHX_ current);
1003 load_perl (aTHX_ coro);
1004
1005 coro_unwind_stacks (aTHX);
1006 coro_destruct_stacks (aTHX);
1007
1008 // now save some sv's to be free'd later
1009 svf [0] = GvSV (PL_defgv);
1010 svf [1] = (SV *)GvAV (PL_defgv);
1011 svf [2] = GvSV (PL_errgv);
1012 svf [3] = (SV *)PL_defoutgv;
1013 svf [4] = PL_rs;
1014 svf [5] = GvSV (irsgv);
1015 svf [6] = (SV *)GvHV (PL_hintgv);
1016 svf [7] = PL_diehook;
1017 svf [8] = PL_warnhook;
1018 assert (9 == sizeof (svf) / sizeof (*svf));
1019
1020 load_perl (aTHX_ current);
1021 }
1022
1023 {
1024 int i;
1025
1026 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1027 SvREFCNT_dec (svf [i]);
1028
764 SvREFCNT_dec (coro->saved_deffh); 1029 SvREFCNT_dec (coro->saved_deffh);
765 SvREFCNT_dec (coro->throw); 1030 SvREFCNT_dec (coro->rouse_cb);
766 1031 SvREFCNT_dec (coro->invoke_cb);
767 coro_destroy_stacks (aTHX); 1032 SvREFCNT_dec (coro->invoke_av);
1033 }
768} 1034}
769 1035
770static void 1036INLINE void
771free_coro_mortal (pTHX) 1037free_coro_mortal (pTHX)
772{ 1038{
773 if (expect_true (coro_mortal)) 1039 if (expect_true (coro_mortal))
774 { 1040 {
775 SvREFCNT_dec (coro_mortal); 1041 SvREFCNT_dec (coro_mortal);
… …
780static int 1046static int
781runops_trace (pTHX) 1047runops_trace (pTHX)
782{ 1048{
783 COP *oldcop = 0; 1049 COP *oldcop = 0;
784 int oldcxix = -2; 1050 int oldcxix = -2;
785 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
786 coro_cctx *cctx = coro->cctx;
787 1051
788 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1052 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
789 { 1053 {
790 PERL_ASYNC_CHECK (); 1054 PERL_ASYNC_CHECK ();
791 1055
792 if (cctx->flags & CC_TRACE_ALL) 1056 if (cctx_current->flags & CC_TRACE_ALL)
793 { 1057 {
794 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1058 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
795 { 1059 {
796 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1060 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
797 SV **bot, **top; 1061 SV **bot, **top;
798 AV *av = newAV (); /* return values */ 1062 AV *av = newAV (); /* return values */
799 SV **cb; 1063 SV **cb;
… …
809 : cx->blk_gimme == G_SCALAR ? bot + 1 1073 : cx->blk_gimme == G_SCALAR ? bot + 1
810 : bot; 1074 : bot;
811 1075
812 av_extend (av, top - bot); 1076 av_extend (av, top - bot);
813 while (bot < top) 1077 while (bot < top)
814 av_push (av, SvREFCNT_inc (*bot++)); 1078 av_push (av, SvREFCNT_inc_NN (*bot++));
815 1079
816 PL_runops = RUNOPS_DEFAULT; 1080 PL_runops = RUNOPS_DEFAULT;
817 ENTER; 1081 ENTER;
818 SAVETMPS; 1082 SAVETMPS;
819 EXTEND (SP, 3); 1083 EXTEND (SP, 3);
820 PUSHMARK (SP); 1084 PUSHMARK (SP);
821 PUSHs (&PL_sv_no); 1085 PUSHs (&PL_sv_no);
822 PUSHs (fullname); 1086 PUSHs (fullname);
823 PUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 1087 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
824 PUTBACK; 1088 PUTBACK;
825 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0); 1089 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
826 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1090 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
827 SPAGAIN; 1091 SPAGAIN;
828 FREETMPS; 1092 FREETMPS;
829 LEAVE; 1093 LEAVE;
830 PL_runops = runops_trace; 1094 PL_runops = runops_trace;
… …
836 1100
837 if (PL_curcop != &PL_compiling) 1101 if (PL_curcop != &PL_compiling)
838 { 1102 {
839 SV **cb; 1103 SV **cb;
840 1104
841 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1105 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
842 { 1106 {
843 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1107 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
844 1108
845 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1109 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
846 { 1110 {
847 runops_proc_t old_runops = PL_runops;
848 dSP; 1111 dSP;
849 GV *gv = CvGV (cx->blk_sub.cv); 1112 GV *gv = CvGV (cx->blk_sub.cv);
850 SV *fullname = sv_2mortal (newSV (0)); 1113 SV *fullname = sv_2mortal (newSV (0));
851 1114
852 if (isGV (gv)) 1115 if (isGV (gv))
… …
857 SAVETMPS; 1120 SAVETMPS;
858 EXTEND (SP, 3); 1121 EXTEND (SP, 3);
859 PUSHMARK (SP); 1122 PUSHMARK (SP);
860 PUSHs (&PL_sv_yes); 1123 PUSHs (&PL_sv_yes);
861 PUSHs (fullname); 1124 PUSHs (fullname);
862 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1125 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
863 PUTBACK; 1126 PUTBACK;
864 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0); 1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
865 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
866 SPAGAIN; 1129 SPAGAIN;
867 FREETMPS; 1130 FREETMPS;
868 LEAVE; 1131 LEAVE;
869 PL_runops = runops_trace; 1132 PL_runops = runops_trace;
870 } 1133 }
871 1134
872 oldcxix = cxstack_ix; 1135 oldcxix = cxstack_ix;
873 } 1136 }
874 1137
875 if (cctx->flags & CC_TRACE_LINE) 1138 if (cctx_current->flags & CC_TRACE_LINE)
876 { 1139 {
877 dSP; 1140 dSP;
878 1141
879 PL_runops = RUNOPS_DEFAULT; 1142 PL_runops = RUNOPS_DEFAULT;
880 ENTER; 1143 ENTER;
… …
883 PL_runops = RUNOPS_DEFAULT; 1146 PL_runops = RUNOPS_DEFAULT;
884 PUSHMARK (SP); 1147 PUSHMARK (SP);
885 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); 1148 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
886 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); 1149 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
887 PUTBACK; 1150 PUTBACK;
888 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0); 1151 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
889 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1152 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
890 SPAGAIN; 1153 SPAGAIN;
891 FREETMPS; 1154 FREETMPS;
892 LEAVE; 1155 LEAVE;
893 PL_runops = runops_trace; 1156 PL_runops = runops_trace;
… …
899 1162
900 TAINT_NOT; 1163 TAINT_NOT;
901 return 0; 1164 return 0;
902} 1165}
903 1166
904/* inject a fake call to Coro::State::_cctx_init into the execution */ 1167static struct CoroSLF cctx_ssl_frame;
905/* _cctx_init should be careful, as it could be called at almost any time */ 1168
906/* during execution of a perl program */ 1169static void
1170slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1171{
1172 ta->prev = 0;
1173}
1174
1175static int
1176slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1177{
1178 *frame = cctx_ssl_frame;
1179
1180 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1181}
1182
1183/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
907static void NOINLINE 1184static void NOINLINE
908cctx_prepare (pTHX_ coro_cctx *cctx) 1185cctx_prepare (pTHX)
909{ 1186{
910 dSP;
911 LOGOP myop;
912
913 PL_top_env = &PL_start_env; 1187 PL_top_env = &PL_start_env;
914 1188
915 if (cctx->flags & CC_TRACE) 1189 if (cctx_current->flags & CC_TRACE)
916 PL_runops = runops_trace; 1190 PL_runops = runops_trace;
917 1191
918 Zero (&myop, 1, LOGOP); 1192 /* we already must be executing an SLF op, there is no other valid way
919 myop.op_next = PL_op; 1193 * that can lead to creation of a new cctx */
920 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1194 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1195 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
921 1196
922 PUSHMARK (SP); 1197 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
923 EXTEND (SP, 2); 1198 cctx_ssl_frame = slf_frame;
924 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1199
925 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1200 slf_frame.prepare = slf_prepare_set_stacklevel;
926 PUTBACK; 1201 slf_frame.check = slf_check_set_stacklevel;
927 PL_op = (OP *)&myop; 1202}
928 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1203
929 SPAGAIN; 1204/* the tail of transfer: execute stuff we can only do after a transfer */
1205INLINE void
1206transfer_tail (pTHX)
1207{
1208 free_coro_mortal (aTHX);
930} 1209}
931 1210
932/* 1211/*
933 * this is a _very_ stripped down perl interpreter ;) 1212 * this is a _very_ stripped down perl interpreter ;)
934 */ 1213 */
935static void 1214static void
936cctx_run (void *arg) 1215cctx_run (void *arg)
937{ 1216{
1217#ifdef USE_ITHREADS
1218# if CORO_PTHREAD
1219 PERL_SET_CONTEXT (coro_thx);
1220# endif
1221#endif
1222 {
938 dTHX; 1223 dTHX;
939 1224
940 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1225 /* normally we would need to skip the entersub here */
941 UNLOCK; 1226 /* not doing so will re-execute it, which is exactly what we want */
942
943 /* we now skip the entersub that lead to transfer() */
944 PL_op = PL_op->op_next; 1227 /* PL_nop = PL_nop->op_next */
945 1228
946 /* inject a fake subroutine call to cctx_init */ 1229 /* inject a fake subroutine call to cctx_init */
947 cctx_prepare (aTHX_ (coro_cctx *)arg); 1230 cctx_prepare (aTHX);
948 1231
1232 /* cctx_run is the alternative tail of transfer() */
1233 transfer_tail (aTHX);
1234
949 /* somebody or something will hit me for both perl_run and PL_restartop */ 1235 /* somebody or something will hit me for both perl_run and PL_restartop */
950 PL_restartop = PL_op; 1236 PL_restartop = PL_op;
951 perl_run (PL_curinterp); 1237 perl_run (PL_curinterp);
952
953 /* 1238 /*
1239 * Unfortunately, there is no way to get at the return values of the
1240 * coro body here, as perl_run destroys these
1241 */
1242
1243 /*
954 * If perl-run returns we assume exit() was being called or the coro 1244 * If perl-run returns we assume exit() was being called or the coro
955 * fell off the end, which seems to be the only valid (non-bug) 1245 * fell off the end, which seems to be the only valid (non-bug)
956 * reason for perl_run to return. We try to exit by jumping to the 1246 * reason for perl_run to return. We try to exit by jumping to the
957 * bootstrap-time "top" top_env, as we cannot restore the "main" 1247 * bootstrap-time "top" top_env, as we cannot restore the "main"
958 * coroutine as Coro has no such concept 1248 * coroutine as Coro has no such concept.
1249 * This actually isn't valid with the pthread backend, but OSes requiring
1250 * that backend are too broken to do it in a standards-compliant way.
959 */ 1251 */
960 PL_top_env = main_top_env; 1252 PL_top_env = main_top_env;
961 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1253 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1254 }
962} 1255}
963 1256
964static coro_cctx * 1257static coro_cctx *
965cctx_new () 1258cctx_new ()
966{ 1259{
967 coro_cctx *cctx; 1260 coro_cctx *cctx;
1261
1262 ++cctx_count;
1263 New (0, cctx, 1, coro_cctx);
1264
1265 cctx->gen = cctx_gen;
1266 cctx->flags = 0;
1267 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1268
1269 return cctx;
1270}
1271
1272/* create a new cctx only suitable as source */
1273static coro_cctx *
1274cctx_new_empty ()
1275{
1276 coro_cctx *cctx = cctx_new ();
1277
1278 cctx->sptr = 0;
1279 coro_create (&cctx->cctx, 0, 0, 0, 0);
1280
1281 return cctx;
1282}
1283
1284/* create a new cctx suitable as destination/running a perl interpreter */
1285static coro_cctx *
1286cctx_new_run ()
1287{
1288 coro_cctx *cctx = cctx_new ();
968 void *stack_start; 1289 void *stack_start;
969 size_t stack_size; 1290 size_t stack_size;
970 1291
971 ++cctx_count;
972
973 Newz (0, cctx, 1, coro_cctx);
974
975#if HAVE_MMAP 1292#if HAVE_MMAP
976 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1293 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
977 /* mmap supposedly does allocate-on-write for us */ 1294 /* mmap supposedly does allocate-on-write for us */
978 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1295 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
979 1296
980 if (cctx->sptr != (void *)-1) 1297 if (cctx->sptr != (void *)-1)
981 { 1298 {
982# if CORO_STACKGUARD 1299 #if CORO_STACKGUARD
983 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1300 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
984# endif 1301 #endif
985 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1302 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
986 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1303 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
987 cctx->flags |= CC_MAPPED; 1304 cctx->flags |= CC_MAPPED;
988 } 1305 }
989 else 1306 else
990#endif 1307#endif
991 { 1308 {
992 cctx->ssize = coro_stacksize * (long)sizeof (long); 1309 cctx->ssize = cctx_stacksize * (long)sizeof (long);
993 New (0, cctx->sptr, coro_stacksize, long); 1310 New (0, cctx->sptr, cctx_stacksize, long);
994 1311
995 if (!cctx->sptr) 1312 if (!cctx->sptr)
996 { 1313 {
997 perror ("FATAL: unable to allocate stack for coroutine"); 1314 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
998 _exit (EXIT_FAILURE); 1315 _exit (EXIT_FAILURE);
999 } 1316 }
1000 1317
1001 stack_start = cctx->sptr; 1318 stack_start = cctx->sptr;
1002 stack_size = cctx->ssize; 1319 stack_size = cctx->ssize;
1003 } 1320 }
1004 1321
1005 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1322 #if CORO_USE_VALGRIND
1323 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1324 #endif
1325
1006 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1326 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1007 1327
1008 return cctx; 1328 return cctx;
1009} 1329}
1010 1330
… …
1012cctx_destroy (coro_cctx *cctx) 1332cctx_destroy (coro_cctx *cctx)
1013{ 1333{
1014 if (!cctx) 1334 if (!cctx)
1015 return; 1335 return;
1016 1336
1337 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1338
1017 --cctx_count; 1339 --cctx_count;
1340 coro_destroy (&cctx->cctx);
1018 1341
1342 /* coro_transfer creates new, empty cctx's */
1343 if (cctx->sptr)
1344 {
1019#if CORO_USE_VALGRIND 1345 #if CORO_USE_VALGRIND
1020 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1346 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1021#endif 1347 #endif
1022 1348
1023#if HAVE_MMAP 1349#if HAVE_MMAP
1024 if (cctx->flags & CC_MAPPED) 1350 if (cctx->flags & CC_MAPPED)
1025 munmap (cctx->sptr, cctx->ssize); 1351 munmap (cctx->sptr, cctx->ssize);
1026 else 1352 else
1027#endif 1353#endif
1028 Safefree (cctx->sptr); 1354 Safefree (cctx->sptr);
1355 }
1029 1356
1030 Safefree (cctx); 1357 Safefree (cctx);
1031} 1358}
1032 1359
1033/* wether this cctx should be destructed */ 1360/* wether this cctx should be destructed */
1034#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1361#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1035 1362
1036static coro_cctx * 1363static coro_cctx *
1037cctx_get (pTHX_ int gimme) 1364cctx_get (pTHX)
1038{ 1365{
1039 while (expect_true (cctx_first[gimme])) 1366 while (expect_true (cctx_first))
1040 { 1367 {
1041 coro_cctx *cctx = cctx_first[gimme]; 1368 coro_cctx *cctx = cctx_first;
1042 cctx_first[gimme] = cctx->next; 1369 cctx_first = cctx->next;
1043 --cctx_idle[gimme]; 1370 --cctx_idle;
1044 1371
1045 if (expect_true (!CCTX_EXPIRED (cctx))) 1372 if (expect_true (!CCTX_EXPIRED (cctx)))
1046 return cctx; 1373 return cctx;
1047 1374
1048 cctx_destroy (cctx); 1375 cctx_destroy (cctx);
1049 } 1376 }
1050 1377
1051 assert (!gimme);
1052 return cctx_new (); 1378 return cctx_new_run ();
1053} 1379}
1054 1380
1055static void 1381static void
1056cctx_put (coro_cctx *cctx, int gimme) 1382cctx_put (coro_cctx *cctx)
1057{ 1383{
1384 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1385
1058 /* free another cctx if overlimit */ 1386 /* free another cctx if overlimit */
1059 if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX)) 1387 if (expect_false (cctx_idle >= cctx_max_idle))
1060 { 1388 {
1061 coro_cctx *first = cctx_first[gimme]; 1389 coro_cctx *first = cctx_first;
1062 cctx_first[gimme] = first->next; 1390 cctx_first = first->next;
1063 --cctx_idle[gimme]; 1391 --cctx_idle;
1064 1392
1065 cctx_destroy (first); 1393 cctx_destroy (first);
1066 } 1394 }
1067 1395
1068 ++cctx_idle[gimme]; 1396 ++cctx_idle;
1069 cctx->next = cctx_first[gimme]; 1397 cctx->next = cctx_first;
1070 cctx_first[gimme] = cctx; 1398 cctx_first = cctx;
1071} 1399}
1072 1400
1073/** coroutine switching *****************************************************/ 1401/** coroutine switching *****************************************************/
1074 1402
1075static void 1403static void
1076transfer_check (pTHX_ struct coro *prev, struct coro *next) 1404transfer_check (pTHX_ struct coro *prev, struct coro *next)
1077{ 1405{
1406 /* TODO: throwing up here is considered harmful */
1407
1078 if (expect_true (prev != next)) 1408 if (expect_true (prev != next))
1079 { 1409 {
1080 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1410 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1081 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1411 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1082 1412
1083 if (expect_false (next->flags & CF_RUNNING))
1084 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1085
1086 if (expect_false (next->flags & CF_DESTROYED)) 1413 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1087 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1414 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1088 1415
1089 if (
1090#if PERL_VERSION_ATLEAST (5,9,0) 1416#if !PERL_VERSION_ATLEAST (5,10,0)
1091 expect_false (PL_parser)
1092#else
1093 expect_false (PL_lex_state != LEX_NOTPARSING) 1417 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1094#endif
1095 )
1096 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1418 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1419#endif
1097 } 1420 }
1098} 1421}
1099 1422
1100/* always use the TRANSFER macro */ 1423/* always use the TRANSFER macro */
1101static void NOINLINE 1424static void NOINLINE /* noinline so we have a fixed stackframe */
1102transfer (pTHX_ struct coro *prev, struct coro *next) 1425transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1103{ 1426{
1104 dSTACKLEVEL; 1427 dSTACKLEVEL;
1105 1428
1106 /* sometimes transfer is only called to set idle_sp */ 1429 /* sometimes transfer is only called to set idle_sp */
1107 if (expect_false (!next)) 1430 if (expect_false (!prev))
1108 { 1431 {
1109 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1432 cctx_current->idle_sp = STACKLEVEL;
1110 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1433 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1111 } 1434 }
1112 else if (expect_true (prev != next)) 1435 else if (expect_true (prev != next))
1113 { 1436 {
1114 coro_cctx *prev__cctx; 1437 coro_cctx *cctx_prev;
1115 1438
1116 if (expect_false (prev->flags & CF_NEW)) 1439 if (expect_false (prev->flags & CF_NEW))
1117 { 1440 {
1118 /* create a new empty context */ 1441 /* create a new empty/source context */
1119 Newz (0, prev->cctx, 1, coro_cctx);
1120 prev->flags &= ~CF_NEW; 1442 prev->flags &= ~CF_NEW;
1121 prev->flags |= CF_RUNNING; 1443 prev->flags |= CF_RUNNING;
1122 } 1444 }
1123 1445
1124 prev->flags &= ~CF_RUNNING; 1446 prev->flags &= ~CF_RUNNING;
1125 next->flags |= CF_RUNNING; 1447 next->flags |= CF_RUNNING;
1126 1448
1127 LOCK; 1449 /* first get rid of the old state */
1450 save_perl (aTHX_ prev);
1128 1451
1129 if (expect_false (next->flags & CF_NEW)) 1452 if (expect_false (next->flags & CF_NEW))
1130 { 1453 {
1131 /* need to start coroutine */ 1454 /* need to start coroutine */
1132 next->flags &= ~CF_NEW; 1455 next->flags &= ~CF_NEW;
1133 /* first get rid of the old state */
1134 save_perl (aTHX_ prev);
1135 /* setup coroutine call */ 1456 /* setup coroutine call */
1136 coro_setup (aTHX_ next); 1457 coro_setup (aTHX_ next);
1137 } 1458 }
1138 else 1459 else
1460 load_perl (aTHX_ next);
1461
1462 /* possibly untie and reuse the cctx */
1463 if (expect_true (
1464 cctx_current->idle_sp == STACKLEVEL
1465 && !(cctx_current->flags & CC_TRACE)
1466 && !force_cctx
1467 ))
1139 { 1468 {
1140 /* coroutine already started */ 1469 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1141 save_perl (aTHX_ prev); 1470 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1142 load_perl (aTHX_ next); 1471
1472 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1473 /* without this the next cctx_get might destroy the running cctx while still in use */
1474 if (expect_false (CCTX_EXPIRED (cctx_current)))
1475 if (expect_true (!next->cctx))
1476 next->cctx = cctx_get (aTHX);
1477
1478 cctx_put (cctx_current);
1143 } 1479 }
1480 else
1481 prev->cctx = cctx_current;
1144 1482
1145 prev__cctx = prev->cctx; 1483 ++next->usecount;
1146 1484
1147 /* possibly "free" the cctx */ 1485 cctx_prev = cctx_current;
1148 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1486 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1487
1488 next->cctx = 0;
1489
1490 if (expect_false (cctx_prev != cctx_current))
1149 { 1491 {
1150 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1492 cctx_prev->top_env = PL_top_env;
1151 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1493 PL_top_env = cctx_current->top_env;
1152 1494 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1153 prev->cctx = 0;
1154
1155 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1156 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1157 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1158 if (!next->cctx)
1159 next->cctx = cctx_get (aTHX_ next->gimme);
1160
1161 cctx_put (prev__cctx, prev->gimme);
1162 } 1495 }
1163 1496
1164 ++next->usecount; 1497 transfer_tail (aTHX);
1165
1166 if (expect_true (!next->cctx))
1167 next->cctx = cctx_get (aTHX_ next->gimme);
1168
1169 if (expect_false (prev__cctx != next->cctx))
1170 {
1171 prev__cctx->top_env = PL_top_env;
1172 PL_top_env = next->cctx->top_env;
1173 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1174 }
1175
1176 free_coro_mortal (aTHX);
1177 UNLOCK;
1178
1179 if (expect_false (prev->throw || next->throw))
1180 {
1181 struct coro *coro = SvSTATE (coro_current);
1182
1183 if (coro->throw)
1184 {
1185 SV *exception = coro->throw;
1186 coro->throw = 0;
1187 sv_setsv (ERRSV, exception);
1188 croak (0);
1189 }
1190 }
1191 } 1498 }
1192} 1499}
1193 1500
1194struct transfer_args
1195{
1196 struct coro *prev, *next;
1197};
1198
1199#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1501#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1200#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1502#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1201 1503
1202/** high level stuff ********************************************************/ 1504/** high level stuff ********************************************************/
1203 1505
1204static int 1506static int
1205coro_state_destroy (pTHX_ struct coro *coro) 1507coro_state_destroy (pTHX_ struct coro *coro)
1206{ 1508{
1207 if (coro->flags & CF_DESTROYED) 1509 if (coro->flags & CF_DESTROYED)
1208 return 0; 1510 return 0;
1511
1512 if (coro->on_destroy && !PL_dirty)
1513 coro->on_destroy (aTHX_ coro);
1209 1514
1210 coro->flags |= CF_DESTROYED; 1515 coro->flags |= CF_DESTROYED;
1211 1516
1212 if (coro->flags & CF_READY) 1517 if (coro->flags & CF_READY)
1213 { 1518 {
1214 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1519 /* reduce nready, as destroying a ready coro effectively unreadies it */
1215 /* alternative: look through all ready queues and remove the coro */ 1520 /* alternative: look through all ready queues and remove the coro */
1216 LOCK;
1217 --coro_nready; 1521 --coro_nready;
1218 UNLOCK;
1219 } 1522 }
1220 else 1523 else
1221 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1524 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1222 1525
1223 if (coro->mainstack && coro->mainstack != main_mainstack) 1526 if (coro->mainstack
1224 { 1527 && coro->mainstack != main_mainstack
1225 struct coro temp; 1528 && coro->slot
1226 1529 && !PL_dirty)
1227 if (coro->flags & CF_RUNNING)
1228 croak ("FATAL: tried to destroy currently running coroutine");
1229
1230 save_perl (aTHX_ &temp);
1231 load_perl (aTHX_ coro);
1232
1233 coro_destroy (aTHX_ coro); 1530 coro_destruct_perl (aTHX_ coro);
1234
1235 load_perl (aTHX_ &temp);
1236
1237 coro->slot = 0;
1238 }
1239 1531
1240 cctx_destroy (coro->cctx); 1532 cctx_destroy (coro->cctx);
1533 SvREFCNT_dec (coro->startcv);
1241 SvREFCNT_dec (coro->args); 1534 SvREFCNT_dec (coro->args);
1535 SvREFCNT_dec (CORO_THROW);
1242 1536
1243 if (coro->next) coro->next->prev = coro->prev; 1537 if (coro->next) coro->next->prev = coro->prev;
1244 if (coro->prev) coro->prev->next = coro->next; 1538 if (coro->prev) coro->prev->next = coro->next;
1245 if (coro == coro_first) coro_first = coro->next; 1539 if (coro == coro_first) coro_first = coro->next;
1246 1540
… …
1284# define MGf_DUP 0 1578# define MGf_DUP 0
1285#endif 1579#endif
1286}; 1580};
1287 1581
1288static void 1582static void
1289prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1583prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1290{ 1584{
1291 ta->prev = SvSTATE (prev_sv); 1585 ta->prev = SvSTATE (prev_sv);
1292 ta->next = SvSTATE (next_sv); 1586 ta->next = SvSTATE (next_sv);
1293 TRANSFER_CHECK (*ta); 1587 TRANSFER_CHECK (*ta);
1294} 1588}
1295 1589
1296static void 1590static void
1297api_transfer (SV *prev_sv, SV *next_sv) 1591api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1298{ 1592{
1299 dTHX;
1300 struct transfer_args ta; 1593 struct coro_transfer_args ta;
1301 1594
1302 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1595 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1303 TRANSFER (ta); 1596 TRANSFER (ta, 1);
1597}
1598
1599/*****************************************************************************/
1600/* gensub: simple closure generation utility */
1601
1602#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1603
1604/* create a closure from XS, returns a code reference */
1605/* the arg can be accessed via GENSUB_ARG from the callback */
1606/* the callback must use dXSARGS/XSRETURN */
1607static SV *
1608gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1609{
1610 CV *cv = (CV *)newSV (0);
1611
1612 sv_upgrade ((SV *)cv, SVt_PVCV);
1613
1614 CvANON_on (cv);
1615 CvISXSUB_on (cv);
1616 CvXSUB (cv) = xsub;
1617 GENSUB_ARG = arg;
1618
1619 return newRV_noinc ((SV *)cv);
1304} 1620}
1305 1621
1306/** Coro ********************************************************************/ 1622/** Coro ********************************************************************/
1307 1623
1308static void 1624INLINE void
1309coro_enq (pTHX_ SV *coro_sv) 1625coro_enq (pTHX_ struct coro *coro)
1310{ 1626{
1311 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1627 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1312}
1313 1628
1314static SV * 1629 SvREFCNT_inc_NN (coro->hv);
1315coro_deq (pTHX_ int min_prio)
1316{
1317 int prio = PRIO_MAX - PRIO_MIN;
1318 1630
1319 min_prio -= PRIO_MIN; 1631 coro->next_ready = 0;
1320 if (min_prio < 0) 1632 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1321 min_prio = 0; 1633 ready [1] = coro;
1634}
1322 1635
1636INLINE struct coro *
1637coro_deq (pTHX)
1638{
1639 int prio;
1640
1323 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1641 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1324 if (AvFILLp (coro_ready [prio]) >= 0) 1642 {
1325 return av_shift (coro_ready [prio]); 1643 struct coro **ready = coro_ready [prio];
1644
1645 if (ready [0])
1646 {
1647 struct coro *coro = ready [0];
1648 ready [0] = coro->next_ready;
1649 return coro;
1650 }
1651 }
1326 1652
1327 return 0; 1653 return 0;
1328} 1654}
1329 1655
1330static int 1656static int
1331api_ready (SV *coro_sv) 1657api_ready (pTHX_ SV *coro_sv)
1332{ 1658{
1333 dTHX;
1334 struct coro *coro; 1659 struct coro *coro;
1335 1660 SV *sv_hook;
1336 if (SvROK (coro_sv)) 1661 void (*xs_hook)(void);
1337 coro_sv = SvRV (coro_sv);
1338 1662
1339 coro = SvSTATE (coro_sv); 1663 coro = SvSTATE (coro_sv);
1340 1664
1341 if (coro->flags & CF_READY) 1665 if (coro->flags & CF_READY)
1342 return 0; 1666 return 0;
1343 1667
1344 coro->flags |= CF_READY; 1668 coro->flags |= CF_READY;
1345 1669
1346 LOCK; 1670 sv_hook = coro_nready ? 0 : coro_readyhook;
1347 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1671 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1672
1673 coro_enq (aTHX_ coro);
1348 ++coro_nready; 1674 ++coro_nready;
1349 UNLOCK; 1675
1676 if (sv_hook)
1677 {
1678 dSP;
1679
1680 ENTER;
1681 SAVETMPS;
1682
1683 PUSHMARK (SP);
1684 PUTBACK;
1685 call_sv (sv_hook, G_VOID | G_DISCARD);
1686
1687 FREETMPS;
1688 LEAVE;
1689 }
1690
1691 if (xs_hook)
1692 xs_hook ();
1350 1693
1351 return 1; 1694 return 1;
1352} 1695}
1353 1696
1354static int 1697static int
1355api_is_ready (SV *coro_sv) 1698api_is_ready (pTHX_ SV *coro_sv)
1356{ 1699{
1357 dTHX;
1358 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1700 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1359} 1701}
1360 1702
1361static void 1703/* expects to own a reference to next->hv */
1704INLINE void
1362prepare_schedule (pTHX_ struct transfer_args *ta) 1705prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1363{ 1706{
1364 SV *prev_sv, *next_sv;
1365
1366 for (;;)
1367 {
1368 LOCK;
1369 next_sv = coro_deq (aTHX_ PRIO_MIN);
1370
1371 /* nothing to schedule: call the idle handler */
1372 if (expect_false (!next_sv))
1373 {
1374 dSP;
1375 UNLOCK;
1376
1377 ENTER;
1378 SAVETMPS;
1379
1380 PUSHMARK (SP);
1381 PUTBACK;
1382 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1383
1384 FREETMPS;
1385 LEAVE;
1386 continue;
1387 }
1388
1389 ta->next = SvSTATE (next_sv);
1390
1391 /* cannot transfer to destroyed coros, skip and look for next */
1392 if (expect_false (ta->next->flags & CF_DESTROYED))
1393 {
1394 UNLOCK;
1395 SvREFCNT_dec (next_sv);
1396 /* coro_nready is already taken care of by destroy */
1397 continue;
1398 }
1399
1400 --coro_nready;
1401 UNLOCK;
1402 break;
1403 }
1404
1405 /* free this only after the transfer */
1406 prev_sv = SvRV (coro_current); 1707 SV *prev_sv = SvRV (coro_current);
1708
1407 ta->prev = SvSTATE (prev_sv); 1709 ta->prev = SvSTATE_hv (prev_sv);
1710 ta->next = next;
1711
1408 TRANSFER_CHECK (*ta); 1712 TRANSFER_CHECK (*ta);
1409 assert (ta->next->flags & CF_READY); 1713
1410 ta->next->flags &= ~CF_READY;
1411 SvRV_set (coro_current, next_sv); 1714 SvRV_set (coro_current, (SV *)next->hv);
1412 1715
1413 LOCK;
1414 free_coro_mortal (aTHX); 1716 free_coro_mortal (aTHX);
1415 coro_mortal = prev_sv; 1717 coro_mortal = prev_sv;
1416 UNLOCK;
1417} 1718}
1418 1719
1419static void 1720static void
1721prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1722{
1723 for (;;)
1724 {
1725 struct coro *next = coro_deq (aTHX);
1726
1727 if (expect_true (next))
1728 {
1729 /* cannot transfer to destroyed coros, skip and look for next */
1730 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1731 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1732 else
1733 {
1734 next->flags &= ~CF_READY;
1735 --coro_nready;
1736
1737 prepare_schedule_to (aTHX_ ta, next);
1738 break;
1739 }
1740 }
1741 else
1742 {
1743 /* nothing to schedule: call the idle handler */
1744 if (SvROK (sv_idle)
1745 && SvOBJECT (SvRV (sv_idle)))
1746 {
1747 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1748 api_ready (aTHX_ SvRV (sv_idle));
1749 --coro_nready;
1750 }
1751 else
1752 {
1753 dSP;
1754
1755 ENTER;
1756 SAVETMPS;
1757
1758 PUSHMARK (SP);
1759 PUTBACK;
1760 call_sv (sv_idle, G_VOID | G_DISCARD);
1761
1762 FREETMPS;
1763 LEAVE;
1764 }
1765 }
1766 }
1767}
1768
1769INLINE void
1420prepare_cede (pTHX_ struct transfer_args *ta) 1770prepare_cede (pTHX_ struct coro_transfer_args *ta)
1421{ 1771{
1422 api_ready (coro_current); 1772 api_ready (aTHX_ coro_current);
1423 prepare_schedule (aTHX_ ta); 1773 prepare_schedule (aTHX_ ta);
1424} 1774}
1425 1775
1776INLINE void
1777prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1778{
1779 SV *prev = SvRV (coro_current);
1780
1781 if (coro_nready)
1782 {
1783 prepare_schedule (aTHX_ ta);
1784 api_ready (aTHX_ prev);
1785 }
1786 else
1787 prepare_nop (aTHX_ ta);
1788}
1789
1790static void
1791api_schedule (pTHX)
1792{
1793 struct coro_transfer_args ta;
1794
1795 prepare_schedule (aTHX_ &ta);
1796 TRANSFER (ta, 1);
1797}
1798
1799static void
1800api_schedule_to (pTHX_ SV *coro_sv)
1801{
1802 struct coro_transfer_args ta;
1803 struct coro *next = SvSTATE (coro_sv);
1804
1805 SvREFCNT_inc_NN (coro_sv);
1806 prepare_schedule_to (aTHX_ &ta, next);
1807}
1808
1426static int 1809static int
1427prepare_cede_notself (pTHX_ struct transfer_args *ta) 1810api_cede (pTHX)
1428{ 1811{
1429 if (coro_nready) 1812 struct coro_transfer_args ta;
1430 { 1813
1431 SV *prev = SvRV (coro_current);
1432 prepare_schedule (aTHX_ ta); 1814 prepare_cede (aTHX_ &ta);
1433 api_ready (prev); 1815
1816 if (expect_true (ta.prev != ta.next))
1817 {
1818 TRANSFER (ta, 1);
1434 return 1; 1819 return 1;
1435 } 1820 }
1436 else 1821 else
1437 return 0; 1822 return 0;
1438} 1823}
1439 1824
1440static void
1441api_schedule (void)
1442{
1443 dTHX;
1444 struct transfer_args ta;
1445
1446 prepare_schedule (aTHX_ &ta);
1447 TRANSFER (ta);
1448}
1449
1450static int 1825static int
1451api_cede (void) 1826api_cede_notself (pTHX)
1452{ 1827{
1453 dTHX; 1828 if (coro_nready)
1829 {
1454 struct transfer_args ta; 1830 struct coro_transfer_args ta;
1455 1831
1456 prepare_cede (aTHX_ &ta); 1832 prepare_cede_notself (aTHX_ &ta);
1457
1458 if (expect_true (ta.prev != ta.next))
1459 {
1460 TRANSFER (ta); 1833 TRANSFER (ta, 1);
1461 return 1; 1834 return 1;
1462 } 1835 }
1463 else 1836 else
1464 return 0; 1837 return 0;
1465} 1838}
1466 1839
1467static int 1840static void
1468api_cede_notself (void)
1469{
1470 dTHX;
1471 struct transfer_args ta;
1472
1473 if (prepare_cede_notself (aTHX_ &ta))
1474 {
1475 TRANSFER (ta);
1476 return 1;
1477 }
1478 else
1479 return 0;
1480}
1481
1482static void
1483api_trace (SV *coro_sv, int flags) 1841api_trace (pTHX_ SV *coro_sv, int flags)
1484{ 1842{
1485 dTHX;
1486 struct coro *coro = SvSTATE (coro_sv); 1843 struct coro *coro = SvSTATE (coro_sv);
1487 1844
1845 if (coro->flags & CF_RUNNING)
1846 croak ("cannot enable tracing on a running coroutine, caught");
1847
1488 if (flags & CC_TRACE) 1848 if (flags & CC_TRACE)
1489 { 1849 {
1490 if (!coro->cctx) 1850 if (!coro->cctx)
1491 coro->cctx = cctx_new (); 1851 coro->cctx = cctx_new_run ();
1492 else if (!(coro->cctx->flags & CC_TRACE)) 1852 else if (!(coro->cctx->flags & CC_TRACE))
1493 croak ("cannot enable tracing on coroutine with custom stack"); 1853 croak ("cannot enable tracing on coroutine with custom stack, caught");
1494 1854
1495 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1855 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1496 } 1856 }
1497 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1857 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1498 { 1858 {
… …
1503 else 1863 else
1504 coro->slot->runops = RUNOPS_DEFAULT; 1864 coro->slot->runops = RUNOPS_DEFAULT;
1505 } 1865 }
1506} 1866}
1507 1867
1868static void
1869coro_call_on_destroy (pTHX_ struct coro *coro)
1870{
1871 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1872 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1873
1874 if (on_destroyp)
1875 {
1876 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1877
1878 while (AvFILLp (on_destroy) >= 0)
1879 {
1880 dSP; /* don't disturb outer sp */
1881 SV *cb = av_pop (on_destroy);
1882
1883 PUSHMARK (SP);
1884
1885 if (statusp)
1886 {
1887 int i;
1888 AV *status = (AV *)SvRV (*statusp);
1889 EXTEND (SP, AvFILLp (status) + 1);
1890
1891 for (i = 0; i <= AvFILLp (status); ++i)
1892 PUSHs (AvARRAY (status)[i]);
1893 }
1894
1895 PUTBACK;
1896 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1897 }
1898 }
1899}
1900
1901static void
1902slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 int i;
1905 HV *hv = (HV *)SvRV (coro_current);
1906 AV *av = newAV ();
1907
1908 av_extend (av, items - 1);
1909 for (i = 0; i < items; ++i)
1910 av_push (av, SvREFCNT_inc_NN (arg [i]));
1911
1912 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1913
1914 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1915 api_ready (aTHX_ sv_manager);
1916
1917 frame->prepare = prepare_schedule;
1918 frame->check = slf_check_repeat;
1919
1920 /* as a minor optimisation, we could unwind all stacks here */
1921 /* but that puts extra pressure on pp_slf, and is not worth much */
1922 /*coro_unwind_stacks (aTHX);*/
1923}
1924
1925/*****************************************************************************/
1926/* async pool handler */
1927
1928static int
1929slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1930{
1931 HV *hv = (HV *)SvRV (coro_current);
1932 struct coro *coro = (struct coro *)frame->data;
1933
1934 if (!coro->invoke_cb)
1935 return 1; /* loop till we have invoke */
1936 else
1937 {
1938 hv_store (hv, "desc", sizeof ("desc") - 1,
1939 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1940
1941 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1942
1943 {
1944 dSP;
1945 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1946 PUTBACK;
1947 }
1948
1949 SvREFCNT_dec (GvAV (PL_defgv));
1950 GvAV (PL_defgv) = coro->invoke_av;
1951 coro->invoke_av = 0;
1952
1953 return 0;
1954 }
1955}
1956
1957static void
1958slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1959{
1960 HV *hv = (HV *)SvRV (coro_current);
1961 struct coro *coro = SvSTATE_hv ((SV *)hv);
1962
1963 if (expect_true (coro->saved_deffh))
1964 {
1965 /* subsequent iteration */
1966 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1967 coro->saved_deffh = 0;
1968
1969 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1970 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1971 {
1972 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1973 coro->invoke_av = newAV ();
1974
1975 frame->prepare = prepare_nop;
1976 }
1977 else
1978 {
1979 av_clear (GvAV (PL_defgv));
1980 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1981
1982 coro->prio = 0;
1983
1984 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1985 api_trace (aTHX_ coro_current, 0);
1986
1987 frame->prepare = prepare_schedule;
1988 av_push (av_async_pool, SvREFCNT_inc (hv));
1989 }
1990 }
1991 else
1992 {
1993 /* first iteration, simply fall through */
1994 frame->prepare = prepare_nop;
1995 }
1996
1997 frame->check = slf_check_pool_handler;
1998 frame->data = (void *)coro;
1999}
2000
2001/*****************************************************************************/
2002/* rouse callback */
2003
2004#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2005
2006static void
2007coro_rouse_callback (pTHX_ CV *cv)
2008{
2009 dXSARGS;
2010 SV *data = (SV *)GENSUB_ARG;
2011
2012 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2013 {
2014 /* first call, set args */
2015 SV *coro = SvRV (data);
2016 AV *av = newAV ();
2017
2018 SvRV_set (data, (SV *)av);
2019
2020 /* better take a full copy of the arguments */
2021 while (items--)
2022 av_store (av, items, newSVsv (ST (items)));
2023
2024 api_ready (aTHX_ coro);
2025 SvREFCNT_dec (coro);
2026 }
2027
2028 XSRETURN_EMPTY;
2029}
2030
2031static int
2032slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2033{
2034 SV *data = (SV *)frame->data;
2035
2036 if (CORO_THROW)
2037 return 0;
2038
2039 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2040 return 1;
2041
2042 /* now push all results on the stack */
2043 {
2044 dSP;
2045 AV *av = (AV *)SvRV (data);
2046 int i;
2047
2048 EXTEND (SP, AvFILLp (av) + 1);
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2051
2052 /* we have stolen the elements, so set length to zero and free */
2053 AvFILLp (av) = -1;
2054 av_undef (av);
2055
2056 PUTBACK;
2057 }
2058
2059 return 0;
2060}
2061
2062static void
2063slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 SV *cb;
2066
2067 if (items)
2068 cb = arg [0];
2069 else
2070 {
2071 struct coro *coro = SvSTATE_current;
2072
2073 if (!coro->rouse_cb)
2074 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2075
2076 cb = sv_2mortal (coro->rouse_cb);
2077 coro->rouse_cb = 0;
2078 }
2079
2080 if (!SvROK (cb)
2081 || SvTYPE (SvRV (cb)) != SVt_PVCV
2082 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2083 croak ("Coro::rouse_wait called with illegal callback argument,");
2084
2085 {
2086 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2087 SV *data = (SV *)GENSUB_ARG;
2088
2089 frame->data = (void *)data;
2090 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2091 frame->check = slf_check_rouse_wait;
2092 }
2093}
2094
2095static SV *
2096coro_new_rouse_cb (pTHX)
2097{
2098 HV *hv = (HV *)SvRV (coro_current);
2099 struct coro *coro = SvSTATE_hv (hv);
2100 SV *data = newRV_inc ((SV *)hv);
2101 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2102
2103 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2104 SvREFCNT_dec (data); /* magicext increases the refcount */
2105
2106 SvREFCNT_dec (coro->rouse_cb);
2107 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2108
2109 return cb;
2110}
2111
2112/*****************************************************************************/
2113/* schedule-like-function opcode (SLF) */
2114
2115static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2116static const CV *slf_cv;
2117static SV **slf_argv;
2118static int slf_argc, slf_arga; /* count, allocated */
2119static I32 slf_ax; /* top of stack, for restore */
2120
2121/* this restores the stack in the case we patched the entersub, to */
2122/* recreate the stack frame as perl will on following calls */
2123/* since entersub cleared the stack */
2124static OP *
2125pp_restore (pTHX)
2126{
2127 int i;
2128 SV **SP = PL_stack_base + slf_ax;
2129
2130 PUSHMARK (SP);
2131
2132 EXTEND (SP, slf_argc + 1);
2133
2134 for (i = 0; i < slf_argc; ++i)
2135 PUSHs (sv_2mortal (slf_argv [i]));
2136
2137 PUSHs ((SV *)CvGV (slf_cv));
2138
2139 RETURNOP (slf_restore.op_first);
2140}
2141
2142static void
2143slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2144{
2145 SV **arg = (SV **)slf_frame.data;
2146
2147 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2148}
2149
2150static void
2151slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 if (items != 2)
2154 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2155
2156 frame->prepare = slf_prepare_transfer;
2157 frame->check = slf_check_nop;
2158 frame->data = (void *)arg; /* let's hope it will stay valid */
2159}
2160
2161static void
2162slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 frame->prepare = prepare_schedule;
2165 frame->check = slf_check_nop;
2166}
2167
2168static void
2169slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2170{
2171 struct coro *next = (struct coro *)slf_frame.data;
2172
2173 SvREFCNT_inc_NN (next->hv);
2174 prepare_schedule_to (aTHX_ ta, next);
2175}
2176
2177static void
2178slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 if (!items)
2181 croak ("Coro::schedule_to expects a coroutine argument, caught");
2182
2183 frame->data = (void *)SvSTATE (arg [0]);
2184 frame->prepare = slf_prepare_schedule_to;
2185 frame->check = slf_check_nop;
2186}
2187
2188static void
2189slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 api_ready (aTHX_ SvRV (coro_current));
2192
2193 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2194}
2195
2196static void
2197slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede;
2200 frame->check = slf_check_nop;
2201}
2202
2203static void
2204slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 frame->prepare = prepare_cede_notself;
2207 frame->check = slf_check_nop;
2208}
2209
2210/*
2211 * these not obviously related functions are all rolled into one
2212 * function to increase chances that they all will call transfer with the same
2213 * stack offset
2214 * SLF stands for "schedule-like-function".
2215 */
2216static OP *
2217pp_slf (pTHX)
2218{
2219 I32 checkmark; /* mark SP to see how many elements check has pushed */
2220
2221 /* set up the slf frame, unless it has already been set-up */
2222 /* the latter happens when a new coro has been started */
2223 /* or when a new cctx was attached to an existing coroutine */
2224 if (expect_true (!slf_frame.prepare))
2225 {
2226 /* first iteration */
2227 dSP;
2228 SV **arg = PL_stack_base + TOPMARK + 1;
2229 int items = SP - arg; /* args without function object */
2230 SV *gv = *sp;
2231
2232 /* do a quick consistency check on the "function" object, and if it isn't */
2233 /* for us, divert to the real entersub */
2234 if (SvTYPE (gv) != SVt_PVGV
2235 || !GvCV (gv)
2236 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2237 return PL_ppaddr[OP_ENTERSUB](aTHX);
2238
2239 if (!(PL_op->op_flags & OPf_STACKED))
2240 {
2241 /* ampersand-form of call, use @_ instead of stack */
2242 AV *av = GvAV (PL_defgv);
2243 arg = AvARRAY (av);
2244 items = AvFILLp (av) + 1;
2245 }
2246
2247 /* now call the init function, which needs to set up slf_frame */
2248 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2249 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2250
2251 /* pop args */
2252 SP = PL_stack_base + POPMARK;
2253
2254 PUTBACK;
2255 }
2256
2257 /* now that we have a slf_frame, interpret it! */
2258 /* we use a callback system not to make the code needlessly */
2259 /* complicated, but so we can run multiple perl coros from one cctx */
2260
2261 do
2262 {
2263 struct coro_transfer_args ta;
2264
2265 slf_frame.prepare (aTHX_ &ta);
2266 TRANSFER (ta, 0);
2267
2268 checkmark = PL_stack_sp - PL_stack_base;
2269 }
2270 while (slf_frame.check (aTHX_ &slf_frame));
2271
2272 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2273
2274 /* exception handling */
2275 if (expect_false (CORO_THROW))
2276 {
2277 SV *exception = sv_2mortal (CORO_THROW);
2278
2279 CORO_THROW = 0;
2280 sv_setsv (ERRSV, exception);
2281 croak (0);
2282 }
2283
2284 /* return value handling - mostly like entersub */
2285 /* make sure we put something on the stack in scalar context */
2286 if (GIMME_V == G_SCALAR)
2287 {
2288 dSP;
2289 SV **bot = PL_stack_base + checkmark;
2290
2291 if (sp == bot) /* too few, push undef */
2292 bot [1] = &PL_sv_undef;
2293 else if (sp != bot + 1) /* too many, take last one */
2294 bot [1] = *sp;
2295
2296 SP = bot + 1;
2297
2298 PUTBACK;
2299 }
2300
2301 return NORMAL;
2302}
2303
2304static void
2305api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2306{
2307 int i;
2308 SV **arg = PL_stack_base + ax;
2309 int items = PL_stack_sp - arg + 1;
2310
2311 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2312
2313 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2314 && PL_op->op_ppaddr != pp_slf)
2315 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2316
2317 CvFLAGS (cv) |= CVf_SLF;
2318 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2319 slf_cv = cv;
2320
2321 /* we patch the op, and then re-run the whole call */
2322 /* we have to put the same argument on the stack for this to work */
2323 /* and this will be done by pp_restore */
2324 slf_restore.op_next = (OP *)&slf_restore;
2325 slf_restore.op_type = OP_CUSTOM;
2326 slf_restore.op_ppaddr = pp_restore;
2327 slf_restore.op_first = PL_op;
2328
2329 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2330
2331 if (PL_op->op_flags & OPf_STACKED)
2332 {
2333 if (items > slf_arga)
2334 {
2335 slf_arga = items;
2336 free (slf_argv);
2337 slf_argv = malloc (slf_arga * sizeof (SV *));
2338 }
2339
2340 slf_argc = items;
2341
2342 for (i = 0; i < items; ++i)
2343 slf_argv [i] = SvREFCNT_inc (arg [i]);
2344 }
2345 else
2346 slf_argc = 0;
2347
2348 PL_op->op_ppaddr = pp_slf;
2349 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2350
2351 PL_op = (OP *)&slf_restore;
2352}
2353
2354/*****************************************************************************/
2355/* dynamic wind */
2356
2357static void
2358on_enterleave_call (pTHX_ SV *cb)
2359{
2360 dSP;
2361
2362 PUSHSTACK;
2363
2364 PUSHMARK (SP);
2365 PUTBACK;
2366 call_sv (cb, G_VOID | G_DISCARD);
2367 SPAGAIN;
2368
2369 POPSTACK;
2370}
2371
2372static SV *
2373coro_avp_pop_and_free (pTHX_ AV **avp)
2374{
2375 AV *av = *avp;
2376 SV *res = av_pop (av);
2377
2378 if (AvFILLp (av) < 0)
2379 {
2380 *avp = 0;
2381 SvREFCNT_dec (av);
2382 }
2383
2384 return res;
2385}
2386
2387static void
2388coro_pop_on_enter (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2391 SvREFCNT_dec (cb);
2392}
2393
2394static void
2395coro_pop_on_leave (pTHX_ void *coro)
2396{
2397 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2398 on_enterleave_call (aTHX_ sv_2mortal (cb));
2399}
2400
2401/*****************************************************************************/
2402/* PerlIO::cede */
2403
2404typedef struct
2405{
2406 PerlIOBuf base;
2407 NV next, every;
2408} PerlIOCede;
2409
2410static IV
2411PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2412{
2413 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2414
2415 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2416 self->next = nvtime () + self->every;
2417
2418 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2419}
2420
2421static SV *
2422PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2423{
2424 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2425
2426 return newSVnv (self->every);
2427}
2428
2429static IV
2430PerlIOCede_flush (pTHX_ PerlIO *f)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433 double now = nvtime ();
2434
2435 if (now >= self->next)
2436 {
2437 api_cede (aTHX);
2438 self->next = now + self->every;
2439 }
2440
2441 return PerlIOBuf_flush (aTHX_ f);
2442}
2443
2444static PerlIO_funcs PerlIO_cede =
2445{
2446 sizeof(PerlIO_funcs),
2447 "cede",
2448 sizeof(PerlIOCede),
2449 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2450 PerlIOCede_pushed,
2451 PerlIOBuf_popped,
2452 PerlIOBuf_open,
2453 PerlIOBase_binmode,
2454 PerlIOCede_getarg,
2455 PerlIOBase_fileno,
2456 PerlIOBuf_dup,
2457 PerlIOBuf_read,
2458 PerlIOBuf_unread,
2459 PerlIOBuf_write,
2460 PerlIOBuf_seek,
2461 PerlIOBuf_tell,
2462 PerlIOBuf_close,
2463 PerlIOCede_flush,
2464 PerlIOBuf_fill,
2465 PerlIOBase_eof,
2466 PerlIOBase_error,
2467 PerlIOBase_clearerr,
2468 PerlIOBase_setlinebuf,
2469 PerlIOBuf_get_base,
2470 PerlIOBuf_bufsiz,
2471 PerlIOBuf_get_ptr,
2472 PerlIOBuf_get_cnt,
2473 PerlIOBuf_set_ptrcnt,
2474};
2475
2476/*****************************************************************************/
2477/* Coro::Semaphore & Coro::Signal */
2478
2479static SV *
2480coro_waitarray_new (pTHX_ int count)
2481{
2482 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2483 AV *av = newAV ();
2484 SV **ary;
2485
2486 /* unfortunately, building manually saves memory */
2487 Newx (ary, 2, SV *);
2488 AvALLOC (av) = ary;
2489#if PERL_VERSION_ATLEAST (5,10,0)
2490 AvARRAY (av) = ary;
2491#else
2492 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2493 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2494 SvPVX ((SV *)av) = (char *)ary;
2495#endif
2496 AvMAX (av) = 1;
2497 AvFILLp (av) = 0;
2498 ary [0] = newSViv (count);
2499
2500 return newRV_noinc ((SV *)av);
2501}
2502
2503/* semaphore */
2504
2505static void
2506coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2507{
2508 SV *count_sv = AvARRAY (av)[0];
2509 IV count = SvIVX (count_sv);
2510
2511 count += adjust;
2512 SvIVX (count_sv) = count;
2513
2514 /* now wake up as many waiters as are expected to lock */
2515 while (count > 0 && AvFILLp (av) > 0)
2516 {
2517 SV *cb;
2518
2519 /* swap first two elements so we can shift a waiter */
2520 AvARRAY (av)[0] = AvARRAY (av)[1];
2521 AvARRAY (av)[1] = count_sv;
2522 cb = av_shift (av);
2523
2524 if (SvOBJECT (cb))
2525 {
2526 api_ready (aTHX_ cb);
2527 --count;
2528 }
2529 else if (SvTYPE (cb) == SVt_PVCV)
2530 {
2531 dSP;
2532 PUSHMARK (SP);
2533 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2534 PUTBACK;
2535 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2536 }
2537
2538 SvREFCNT_dec (cb);
2539 }
2540}
2541
2542static void
2543coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2544{
2545 /* call $sem->adjust (0) to possibly wake up some other waiters */
2546 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2547}
2548
2549static int
2550slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2551{
2552 AV *av = (AV *)frame->data;
2553 SV *count_sv = AvARRAY (av)[0];
2554
2555 /* if we are about to throw, don't actually acquire the lock, just throw */
2556 if (CORO_THROW)
2557 return 0;
2558 else if (SvIVX (count_sv) > 0)
2559 {
2560 SvSTATE_current->on_destroy = 0;
2561
2562 if (acquire)
2563 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2564 else
2565 coro_semaphore_adjust (aTHX_ av, 0);
2566
2567 return 0;
2568 }
2569 else
2570 {
2571 int i;
2572 /* if we were woken up but can't down, we look through the whole */
2573 /* waiters list and only add us if we aren't in there already */
2574 /* this avoids some degenerate memory usage cases */
2575
2576 for (i = 1; i <= AvFILLp (av); ++i)
2577 if (AvARRAY (av)[i] == SvRV (coro_current))
2578 return 1;
2579
2580 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2581 return 1;
2582 }
2583}
2584
2585static int
2586slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2587{
2588 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2589}
2590
2591static int
2592slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2593{
2594 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2595}
2596
2597static void
2598slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 AV *av = (AV *)SvRV (arg [0]);
2601
2602 if (SvIVX (AvARRAY (av)[0]) > 0)
2603 {
2604 frame->data = (void *)av;
2605 frame->prepare = prepare_nop;
2606 }
2607 else
2608 {
2609 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2610
2611 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2612 frame->prepare = prepare_schedule;
2613
2614 /* to avoid race conditions when a woken-up coro gets terminated */
2615 /* we arrange for a temporary on_destroy that calls adjust (0) */
2616 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2617 }
2618}
2619
2620static void
2621slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_down;
2625}
2626
2627static void
2628slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2629{
2630 if (items >= 2)
2631 {
2632 /* callback form */
2633 AV *av = (AV *)SvRV (arg [0]);
2634 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2635
2636 av_push (av, SvREFCNT_inc_NN (cb_cv));
2637
2638 if (SvIVX (AvARRAY (av)[0]) > 0)
2639 coro_semaphore_adjust (aTHX_ av, 0);
2640
2641 frame->prepare = prepare_nop;
2642 frame->check = slf_check_nop;
2643 }
2644 else
2645 {
2646 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2647 frame->check = slf_check_semaphore_wait;
2648 }
2649}
2650
2651/* signal */
2652
2653static void
2654coro_signal_wake (pTHX_ AV *av, int count)
2655{
2656 SvIVX (AvARRAY (av)[0]) = 0;
2657
2658 /* now signal count waiters */
2659 while (count > 0 && AvFILLp (av) > 0)
2660 {
2661 SV *cb;
2662
2663 /* swap first two elements so we can shift a waiter */
2664 cb = AvARRAY (av)[0];
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = cb;
2667
2668 cb = av_shift (av);
2669
2670 if (SvTYPE (cb) == SVt_PVCV)
2671 {
2672 dSP;
2673 PUSHMARK (SP);
2674 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2675 PUTBACK;
2676 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2677 }
2678 else
2679 {
2680 api_ready (aTHX_ cb);
2681 sv_setiv (cb, 0); /* signal waiter */
2682 }
2683
2684 SvREFCNT_dec (cb);
2685
2686 --count;
2687 }
2688}
2689
2690static int
2691slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2692{
2693 /* if we are about to throw, also stop waiting */
2694 return SvROK ((SV *)frame->data) && !CORO_THROW;
2695}
2696
2697static void
2698slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2699{
2700 AV *av = (AV *)SvRV (arg [0]);
2701
2702 if (items >= 2)
2703 {
2704 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2705 av_push (av, SvREFCNT_inc_NN (cb_cv));
2706
2707 if (SvIVX (AvARRAY (av)[0]))
2708 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2709
2710 frame->prepare = prepare_nop;
2711 frame->check = slf_check_nop;
2712 }
2713 else if (SvIVX (AvARRAY (av)[0]))
2714 {
2715 SvIVX (AvARRAY (av)[0]) = 0;
2716 frame->prepare = prepare_nop;
2717 frame->check = slf_check_nop;
2718 }
2719 else
2720 {
2721 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2722
2723 av_push (av, waiter);
2724
2725 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2726 frame->prepare = prepare_schedule;
2727 frame->check = slf_check_signal_wait;
2728 }
2729}
2730
2731/*****************************************************************************/
2732/* Coro::AIO */
2733
2734#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2735
2736/* helper storage struct */
2737struct io_state
2738{
2739 int errorno;
2740 I32 laststype; /* U16 in 5.10.0 */
2741 int laststatval;
2742 Stat_t statcache;
2743};
2744
2745static void
2746coro_aio_callback (pTHX_ CV *cv)
2747{
2748 dXSARGS;
2749 AV *state = (AV *)GENSUB_ARG;
2750 SV *coro = av_pop (state);
2751 SV *data_sv = newSV (sizeof (struct io_state));
2752
2753 av_extend (state, items - 1);
2754
2755 sv_upgrade (data_sv, SVt_PV);
2756 SvCUR_set (data_sv, sizeof (struct io_state));
2757 SvPOK_only (data_sv);
2758
2759 {
2760 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2761
2762 data->errorno = errno;
2763 data->laststype = PL_laststype;
2764 data->laststatval = PL_laststatval;
2765 data->statcache = PL_statcache;
2766 }
2767
2768 /* now build the result vector out of all the parameters and the data_sv */
2769 {
2770 int i;
2771
2772 for (i = 0; i < items; ++i)
2773 av_push (state, SvREFCNT_inc_NN (ST (i)));
2774 }
2775
2776 av_push (state, data_sv);
2777
2778 api_ready (aTHX_ coro);
2779 SvREFCNT_dec (coro);
2780 SvREFCNT_dec ((AV *)state);
2781}
2782
2783static int
2784slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2785{
2786 AV *state = (AV *)frame->data;
2787
2788 /* if we are about to throw, return early */
2789 /* this does not cancel the aio request, but at least */
2790 /* it quickly returns */
2791 if (CORO_THROW)
2792 return 0;
2793
2794 /* one element that is an RV? repeat! */
2795 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2796 return 1;
2797
2798 /* restore status */
2799 {
2800 SV *data_sv = av_pop (state);
2801 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2802
2803 errno = data->errorno;
2804 PL_laststype = data->laststype;
2805 PL_laststatval = data->laststatval;
2806 PL_statcache = data->statcache;
2807
2808 SvREFCNT_dec (data_sv);
2809 }
2810
2811 /* push result values */
2812 {
2813 dSP;
2814 int i;
2815
2816 EXTEND (SP, AvFILLp (state) + 1);
2817 for (i = 0; i <= AvFILLp (state); ++i)
2818 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2819
2820 PUTBACK;
2821 }
2822
2823 return 0;
2824}
2825
2826static void
2827slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2828{
2829 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2830 SV *coro_hv = SvRV (coro_current);
2831 struct coro *coro = SvSTATE_hv (coro_hv);
2832
2833 /* put our coroutine id on the state arg */
2834 av_push (state, SvREFCNT_inc_NN (coro_hv));
2835
2836 /* first see whether we have a non-zero priority and set it as AIO prio */
2837 if (coro->prio)
2838 {
2839 dSP;
2840
2841 static SV *prio_cv;
2842 static SV *prio_sv;
2843
2844 if (expect_false (!prio_cv))
2845 {
2846 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2847 prio_sv = newSViv (0);
2848 }
2849
2850 PUSHMARK (SP);
2851 sv_setiv (prio_sv, coro->prio);
2852 XPUSHs (prio_sv);
2853
2854 PUTBACK;
2855 call_sv (prio_cv, G_VOID | G_DISCARD);
2856 }
2857
2858 /* now call the original request */
2859 {
2860 dSP;
2861 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2862 int i;
2863
2864 PUSHMARK (SP);
2865
2866 /* first push all args to the stack */
2867 EXTEND (SP, items + 1);
2868
2869 for (i = 0; i < items; ++i)
2870 PUSHs (arg [i]);
2871
2872 /* now push the callback closure */
2873 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2874
2875 /* now call the AIO function - we assume our request is uncancelable */
2876 PUTBACK;
2877 call_sv ((SV *)req, G_VOID | G_DISCARD);
2878 }
2879
2880 /* now that the requets is going, we loop toll we have a result */
2881 frame->data = (void *)state;
2882 frame->prepare = prepare_schedule;
2883 frame->check = slf_check_aio_req;
2884}
2885
2886static void
2887coro_aio_req_xs (pTHX_ CV *cv)
2888{
2889 dXSARGS;
2890
2891 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2892
2893 XSRETURN_EMPTY;
2894}
2895
2896/*****************************************************************************/
2897
2898#if CORO_CLONE
2899# include "clone.c"
2900#endif
2901
1508MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2902MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1509 2903
1510PROTOTYPES: DISABLE 2904PROTOTYPES: DISABLE
1511 2905
1512BOOT: 2906BOOT:
1513{ 2907{
1514#ifdef USE_ITHREADS 2908#ifdef USE_ITHREADS
1515 MUTEX_INIT (&coro_mutex); 2909# if CORO_PTHREAD
2910 coro_thx = PERL_GET_CONTEXT;
2911# endif
1516#endif 2912#endif
1517 BOOT_PAGESIZE; 2913 BOOT_PAGESIZE;
2914
2915 cctx_current = cctx_new_empty ();
1518 2916
1519 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2917 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1520 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2918 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1521 2919
2920 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2921 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2922 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2923
1522 hv_sig = coro_get_hv ("SIG", TRUE); 2924 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1523 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE); 2925 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1524 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE); 2926 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1525
1526 if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
1527 if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
1528 2927
1529 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2928 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1530 2929
1531 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2930 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1532 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2931 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1537 main_top_env = PL_top_env; 2936 main_top_env = PL_top_env;
1538 2937
1539 while (main_top_env->je_prev) 2938 while (main_top_env->je_prev)
1540 main_top_env = main_top_env->je_prev; 2939 main_top_env = main_top_env->je_prev;
1541 2940
2941 {
2942 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2943
2944 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2945 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2946
2947 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2948 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2949 }
2950
1542 coroapi.ver = CORO_API_VERSION; 2951 coroapi.ver = CORO_API_VERSION;
2952 coroapi.rev = CORO_API_REVISION;
2953
1543 coroapi.transfer = api_transfer; 2954 coroapi.transfer = api_transfer;
2955
2956 coroapi.sv_state = SvSTATE_;
2957 coroapi.execute_slf = api_execute_slf;
2958 coroapi.prepare_nop = prepare_nop;
2959 coroapi.prepare_schedule = prepare_schedule;
2960 coroapi.prepare_cede = prepare_cede;
2961 coroapi.prepare_cede_notself = prepare_cede_notself;
2962
2963 {
2964 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2965
2966 if (!svp) croak ("Time::HiRes is required");
2967 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2968
2969 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2970 }
1544 2971
1545 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2972 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1546} 2973}
1547 2974
1548SV * 2975SV *
1549new (char *klass, ...) 2976new (char *klass, ...)
2977 ALIAS:
2978 Coro::new = 1
1550 CODE: 2979 CODE:
1551{ 2980{
1552 struct coro *coro; 2981 struct coro *coro;
2982 MAGIC *mg;
1553 HV *hv; 2983 HV *hv;
2984 CV *cb;
1554 int i; 2985 int i;
2986
2987 if (items > 1)
2988 {
2989 cb = coro_sv_2cv (aTHX_ ST (1));
2990
2991 if (!ix)
2992 {
2993 if (CvISXSUB (cb))
2994 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2995
2996 if (!CvROOT (cb))
2997 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2998 }
2999 }
1555 3000
1556 Newz (0, coro, 1, struct coro); 3001 Newz (0, coro, 1, struct coro);
1557 coro->args = newAV (); 3002 coro->args = newAV ();
1558 coro->flags = CF_NEW; 3003 coro->flags = CF_NEW;
1559 3004
1560 if (coro_first) coro_first->prev = coro; 3005 if (coro_first) coro_first->prev = coro;
1561 coro->next = coro_first; 3006 coro->next = coro_first;
1562 coro_first = coro; 3007 coro_first = coro;
1563 3008
1564 coro->hv = hv = newHV (); 3009 coro->hv = hv = newHV ();
1565 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3010 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3011 mg->mg_flags |= MGf_DUP;
1566 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3012 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1567 3013
3014 if (items > 1)
3015 {
1568 av_extend (coro->args, items - 1); 3016 av_extend (coro->args, items - 1 + ix - 1);
3017
3018 if (ix)
3019 {
3020 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3021 cb = cv_coro_run;
3022 }
3023
3024 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3025
1569 for (i = 1; i < items; i++) 3026 for (i = 2; i < items; i++)
1570 av_push (coro->args, newSVsv (ST (i))); 3027 av_push (coro->args, newSVsv (ST (i)));
3028 }
1571} 3029}
1572 OUTPUT: 3030 OUTPUT:
1573 RETVAL 3031 RETVAL
1574 3032
1575# these not obviously related functions are all rolled into the same xs
1576# function to increase chances that they all will call transfer with the same
1577# stack offset
1578void 3033void
1579_set_stacklevel (...) 3034transfer (...)
1580 ALIAS: 3035 PROTOTYPE: $$
1581 Coro::State::transfer = 1 3036 CODE:
1582 Coro::schedule = 2 3037 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1583 Coro::cede = 3
1584 Coro::cede_notself = 4
1585 Coro::Event::next = 5
1586 Coro::Event::next_cancel = 6
1587 PPCODE:
1588{
1589 struct transfer_args ta;
1590 int again = 0;
1591
1592 do
1593 {
1594 switch (ix)
1595 {
1596 case 0:
1597 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1598 ta.next = 0;
1599 break;
1600
1601 case 1:
1602 if (items != 2)
1603 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1604
1605 prepare_transfer (aTHX_ &ta, ST(0), ST(1));
1606 break;
1607
1608 case 2:
1609 prepare_schedule (aTHX_ &ta);
1610 break;
1611
1612 case 3:
1613 prepare_cede (aTHX_ &ta);
1614 break;
1615
1616 case 4:
1617 if (!prepare_cede_notself (aTHX_ &ta))
1618 XSRETURN_EMPTY;
1619
1620 break;
1621
1622 case 5:
1623 case 6:
1624 if (items != 1)
1625 croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
1626
1627 {
1628 SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
1629
1630 if (ev)
1631 {
1632 if (GIMME_V != G_VOID)
1633 {
1634 XPUSHs (ev);
1635 XSRETURN (1);
1636 }
1637 else
1638 XSRETURN_EMPTY;
1639 }
1640 }
1641
1642 prepare_schedule (aTHX_ &ta);
1643 again = 1;
1644 break;
1645 }
1646
1647 /* our caller, entersub, caches *only* this value */
1648 ta.prev->gimme = GIMME_V == G_VOID ? 0
1649 : GIMME_V == G_SCALAR ? 1
1650 : 2;
1651
1652 /* we need to save all local variables, as we might execute a different coroutine when transfer returns */
1653 sp += 2; /* save args */
1654 EXTEND (SP, 4);
1655 PUSHs ((SV *)(intptr_t)items);
1656 PUSHs ((SV *)(intptr_t)ix);
1657 PUSHs ((SV *)(intptr_t)ax);
1658 PUSHs ((SV *)(intptr_t)again);
1659 PUTBACK;
1660 BARRIER;
1661 TRANSFER (ta);
1662 BARRIER;
1663 SPAGAIN;
1664 again = (intptr_t)POPs;
1665 ax = (intptr_t)POPs;
1666 ix = (intptr_t)POPs;
1667 items = (intptr_t)POPs;
1668 sp -= 2; /* restore args */
1669 }
1670 while (again);
1671
1672 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1673 XSRETURN_YES;
1674
1675 XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
1676}
1677 3038
1678bool 3039bool
1679_destroy (SV *coro_sv) 3040_destroy (SV *coro_sv)
1680 CODE: 3041 CODE:
1681 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3042 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1682 OUTPUT: 3043 OUTPUT:
1683 RETVAL 3044 RETVAL
1684 3045
1685void 3046void
1686_exit (code) 3047_exit (int code)
1687 int code
1688 PROTOTYPE: $ 3048 PROTOTYPE: $
1689 CODE: 3049 CODE:
1690 _exit (code); 3050 _exit (code);
1691 3051
3052SV *
3053clone (Coro::State coro)
3054 CODE:
3055{
3056#if CORO_CLONE
3057 struct coro *ncoro = coro_clone (aTHX_ coro);
3058 MAGIC *mg;
3059 /* TODO: too much duplication */
3060 ncoro->hv = newHV ();
3061 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3062 mg->mg_flags |= MGf_DUP;
3063 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3064#else
3065 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3066#endif
3067}
3068 OUTPUT:
3069 RETVAL
3070
1692int 3071int
1693cctx_stacksize (int new_stacksize = 0) 3072cctx_stacksize (int new_stacksize = 0)
3073 PROTOTYPE: ;$
1694 CODE: 3074 CODE:
1695 RETVAL = coro_stacksize; 3075 RETVAL = cctx_stacksize;
1696 if (new_stacksize) 3076 if (new_stacksize)
3077 {
1697 coro_stacksize = new_stacksize; 3078 cctx_stacksize = new_stacksize;
3079 ++cctx_gen;
3080 }
1698 OUTPUT: 3081 OUTPUT:
1699 RETVAL 3082 RETVAL
1700 3083
1701int 3084int
3085cctx_max_idle (int max_idle = 0)
3086 PROTOTYPE: ;$
3087 CODE:
3088 RETVAL = cctx_max_idle;
3089 if (max_idle > 1)
3090 cctx_max_idle = max_idle;
3091 OUTPUT:
3092 RETVAL
3093
3094int
1702cctx_count () 3095cctx_count ()
3096 PROTOTYPE:
1703 CODE: 3097 CODE:
1704 RETVAL = cctx_count; 3098 RETVAL = cctx_count;
1705 OUTPUT: 3099 OUTPUT:
1706 RETVAL 3100 RETVAL
1707 3101
1708int 3102int
1709cctx_idle () 3103cctx_idle ()
3104 PROTOTYPE:
1710 CODE: 3105 CODE:
1711 RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2]; 3106 RETVAL = cctx_idle;
1712 OUTPUT: 3107 OUTPUT:
1713 RETVAL 3108 RETVAL
1714 3109
1715void 3110void
1716list () 3111list ()
3112 PROTOTYPE:
1717 PPCODE: 3113 PPCODE:
1718{ 3114{
1719 struct coro *coro; 3115 struct coro *coro;
1720 for (coro = coro_first; coro; coro = coro->next) 3116 for (coro = coro_first; coro; coro = coro->next)
1721 if (coro->hv) 3117 if (coro->hv)
… …
1726call (Coro::State coro, SV *coderef) 3122call (Coro::State coro, SV *coderef)
1727 ALIAS: 3123 ALIAS:
1728 eval = 1 3124 eval = 1
1729 CODE: 3125 CODE:
1730{ 3126{
1731 if (coro->mainstack) 3127 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1732 { 3128 {
1733 struct coro temp; 3129 struct coro *current = SvSTATE_current;
1734 3130
1735 if (!(coro->flags & CF_RUNNING)) 3131 if (current != coro)
1736 { 3132 {
3133 PUTBACK;
1737 save_perl (aTHX_ &temp); 3134 save_perl (aTHX_ current);
1738 load_perl (aTHX_ coro); 3135 load_perl (aTHX_ coro);
3136 SPAGAIN;
1739 } 3137 }
1740 3138
1741 {
1742 dSP;
1743 ENTER;
1744 SAVETMPS;
1745 PUTBACK;
1746 PUSHSTACK; 3139 PUSHSTACK;
3140
1747 PUSHMARK (SP); 3141 PUSHMARK (SP);
3142 PUTBACK;
1748 3143
1749 if (ix) 3144 if (ix)
1750 eval_sv (coderef, 0); 3145 eval_sv (coderef, 0);
1751 else 3146 else
1752 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3147 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1753 3148
1754 POPSTACK; 3149 POPSTACK;
1755 FREETMPS; 3150 SPAGAIN;
1756 LEAVE;
1757 }
1758 3151
1759 if (!(coro->flags & CF_RUNNING)) 3152 if (current != coro)
1760 { 3153 {
3154 PUTBACK;
1761 save_perl (aTHX_ coro); 3155 save_perl (aTHX_ coro);
1762 load_perl (aTHX_ &temp); 3156 load_perl (aTHX_ current);
3157 SPAGAIN;
1763 } 3158 }
1764 } 3159 }
1765} 3160}
1766 3161
1767SV * 3162SV *
… …
1770 ALIAS: 3165 ALIAS:
1771 is_ready = CF_READY 3166 is_ready = CF_READY
1772 is_running = CF_RUNNING 3167 is_running = CF_RUNNING
1773 is_new = CF_NEW 3168 is_new = CF_NEW
1774 is_destroyed = CF_DESTROYED 3169 is_destroyed = CF_DESTROYED
3170 is_suspended = CF_SUSPENDED
1775 CODE: 3171 CODE:
1776 RETVAL = boolSV (coro->flags & ix); 3172 RETVAL = boolSV (coro->flags & ix);
1777 OUTPUT: 3173 OUTPUT:
1778 RETVAL 3174 RETVAL
1779 3175
1780void 3176void
3177throw (Coro::State self, SV *throw = &PL_sv_undef)
3178 PROTOTYPE: $;$
3179 CODE:
3180{
3181 struct coro *current = SvSTATE_current;
3182 SV **throwp = self == current ? &CORO_THROW : &self->except;
3183 SvREFCNT_dec (*throwp);
3184 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3185}
3186
3187void
1781api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3188api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3189 PROTOTYPE: $;$
3190 C_ARGS: aTHX_ coro, flags
1782 3191
1783SV * 3192SV *
1784has_stack (Coro::State coro) 3193has_cctx (Coro::State coro)
1785 PROTOTYPE: $ 3194 PROTOTYPE: $
1786 CODE: 3195 CODE:
1787 RETVAL = boolSV (!!coro->cctx); 3196 /* maybe manage the running flag differently */
3197 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1788 OUTPUT: 3198 OUTPUT:
1789 RETVAL 3199 RETVAL
1790 3200
1791int 3201int
1792is_traced (Coro::State coro) 3202is_traced (Coro::State coro)
… …
1794 CODE: 3204 CODE:
1795 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3205 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1796 OUTPUT: 3206 OUTPUT:
1797 RETVAL 3207 RETVAL
1798 3208
1799IV 3209UV
1800rss (Coro::State coro) 3210rss (Coro::State coro)
1801 PROTOTYPE: $ 3211 PROTOTYPE: $
1802 ALIAS: 3212 ALIAS:
1803 usecount = 1 3213 usecount = 1
1804 CODE: 3214 CODE:
… …
1808 case 1: RETVAL = coro->usecount; break; 3218 case 1: RETVAL = coro->usecount; break;
1809 } 3219 }
1810 OUTPUT: 3220 OUTPUT:
1811 RETVAL 3221 RETVAL
1812 3222
3223void
3224force_cctx ()
3225 PROTOTYPE:
3226 CODE:
3227 cctx_current->idle_sp = 0;
3228
3229void
3230swap_defsv (Coro::State self)
3231 PROTOTYPE: $
3232 ALIAS:
3233 swap_defav = 1
3234 CODE:
3235 if (!self->slot)
3236 croak ("cannot swap state with coroutine that has no saved state,");
3237 else
3238 {
3239 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3240 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3241
3242 SV *tmp = *src; *src = *dst; *dst = tmp;
3243 }
3244
3245void
3246cancel (Coro::State self)
3247 CODE:
3248 coro_state_destroy (aTHX_ self);
3249 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3250
1813 3251
1814MODULE = Coro::State PACKAGE = Coro 3252MODULE = Coro::State PACKAGE = Coro
1815 3253
1816BOOT: 3254BOOT:
1817{ 3255{
1818 int i;
1819
1820 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE); 3256 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1821 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE); 3257 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3258 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3259 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3260 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1822 av_async_pool = coro_get_av ("Coro::async_pool", TRUE); 3261 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3262 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3263 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3264 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1823 3265
1824 coro_current = coro_get_sv ("Coro::current", FALSE); 3266 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1825 SvREADONLY_on (coro_current); 3267 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3268 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3269 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1826 3270
1827 coro_stash = gv_stashpv ("Coro", TRUE); 3271 coro_stash = gv_stashpv ("Coro", TRUE);
1828 3272
1829 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3273 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1830 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3274 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1831 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3275 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1832 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3276 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1833 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3277 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1834 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3278 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1835 3279
1836 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1837 coro_ready[i] = newAV ();
1838
1839 { 3280 {
1840 SV *sv = perl_get_sv ("Coro::API", TRUE); 3281 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1841 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1842 3282
1843 coroapi.schedule = api_schedule; 3283 coroapi.schedule = api_schedule;
3284 coroapi.schedule_to = api_schedule_to;
1844 coroapi.cede = api_cede; 3285 coroapi.cede = api_cede;
1845 coroapi.cede_notself = api_cede_notself; 3286 coroapi.cede_notself = api_cede_notself;
1846 coroapi.ready = api_ready; 3287 coroapi.ready = api_ready;
1847 coroapi.is_ready = api_is_ready; 3288 coroapi.is_ready = api_is_ready;
1848 coroapi.nready = &coro_nready; 3289 coroapi.nready = coro_nready;
1849 coroapi.current = coro_current; 3290 coroapi.current = coro_current;
1850 3291
1851 GCoroAPI = &coroapi; 3292 /*GCoroAPI = &coroapi;*/
1852 sv_setiv (sv, (IV)&coroapi); 3293 sv_setiv (sv, (IV)&coroapi);
1853 SvREADONLY_on (sv); 3294 SvREADONLY_on (sv);
1854 } 3295 }
1855} 3296}
3297
3298void
3299terminate (...)
3300 CODE:
3301 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3302
3303void
3304schedule (...)
3305 CODE:
3306 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3307
3308void
3309schedule_to (...)
3310 CODE:
3311 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3312
3313void
3314cede_to (...)
3315 CODE:
3316 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3317
3318void
3319cede (...)
3320 CODE:
3321 CORO_EXECUTE_SLF_XS (slf_init_cede);
3322
3323void
3324cede_notself (...)
3325 CODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1856 3327
1857void 3328void
1858_set_current (SV *current) 3329_set_current (SV *current)
1859 PROTOTYPE: $ 3330 PROTOTYPE: $
1860 CODE: 3331 CODE:
1861 SvREFCNT_dec (SvRV (coro_current)); 3332 SvREFCNT_dec (SvRV (coro_current));
1862 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3333 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3334
3335void
3336_set_readyhook (SV *hook)
3337 PROTOTYPE: $
3338 CODE:
3339 SvREFCNT_dec (coro_readyhook);
3340 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1863 3341
1864int 3342int
1865prio (Coro::State coro, int newprio = 0) 3343prio (Coro::State coro, int newprio = 0)
3344 PROTOTYPE: $;$
1866 ALIAS: 3345 ALIAS:
1867 nice = 1 3346 nice = 1
1868 CODE: 3347 CODE:
1869{ 3348{
1870 RETVAL = coro->prio; 3349 RETVAL = coro->prio;
… …
1885 3364
1886SV * 3365SV *
1887ready (SV *self) 3366ready (SV *self)
1888 PROTOTYPE: $ 3367 PROTOTYPE: $
1889 CODE: 3368 CODE:
1890 RETVAL = boolSV (api_ready (self)); 3369 RETVAL = boolSV (api_ready (aTHX_ self));
1891 OUTPUT: 3370 OUTPUT:
1892 RETVAL 3371 RETVAL
1893 3372
1894int 3373int
1895nready (...) 3374nready (...)
… …
1898 RETVAL = coro_nready; 3377 RETVAL = coro_nready;
1899 OUTPUT: 3378 OUTPUT:
1900 RETVAL 3379 RETVAL
1901 3380
1902void 3381void
1903throw (Coro::State self, SV *throw = &PL_sv_undef) 3382suspend (Coro::State self)
1904 PROTOTYPE: $;$ 3383 PROTOTYPE: $
1905 CODE: 3384 CODE:
1906 SvREFCNT_dec (self->throw); 3385 self->flags |= CF_SUSPENDED;
1907 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1908 3386
1909# for async_pool speedup
1910void 3387void
1911_pool_1 (SV *cb) 3388resume (Coro::State self)
3389 PROTOTYPE: $
1912 CODE: 3390 CODE:
1913{ 3391 self->flags &= ~CF_SUSPENDED;
1914 struct coro *coro = SvSTATE (coro_current);
1915 HV *hv = (HV *)SvRV (coro_current);
1916 AV *defav = GvAV (PL_defgv);
1917 SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
1918 AV *invoke_av;
1919 int i, len;
1920 3392
1921 if (!invoke) 3393void
1922 croak ("\3async_pool terminate\2\n"); 3394_pool_handler (...)
3395 CODE:
3396 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1923 3397
1924 SvREFCNT_dec (coro->saved_deffh); 3398void
1925 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3399async_pool (SV *cv, ...)
3400 PROTOTYPE: &@
3401 PPCODE:
3402{
3403 HV *hv = (HV *)av_pop (av_async_pool);
3404 AV *av = newAV ();
3405 SV *cb = ST (0);
3406 int i;
1926 3407
1927 hv_store (hv, "desc", sizeof ("desc") - 1, 3408 av_extend (av, items - 2);
1928 newSVpvn (strpair ("[async_pool]")), 0); 3409 for (i = 1; i < items; ++i)
3410 av_push (av, SvREFCNT_inc_NN (ST (i)));
1929 3411
1930 invoke_av = (AV *)SvRV (invoke); 3412 if ((SV *)hv == &PL_sv_undef)
1931 len = av_len (invoke_av);
1932
1933 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1934
1935 if (len > 0)
1936 { 3413 {
1937 av_fill (defav, len - 1); 3414 PUSHMARK (SP);
1938 for (i = 0; i < len; ++i) 3415 EXTEND (SP, 2);
1939 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3416 PUSHs (sv_Coro);
3417 PUSHs ((SV *)cv_pool_handler);
3418 PUTBACK;
3419 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3420 SPAGAIN;
3421
3422 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
1940 } 3423 }
1941 3424
3425 {
3426 struct coro *coro = SvSTATE_hv (hv);
3427
3428 assert (!coro->invoke_cb);
3429 assert (!coro->invoke_av);
3430 coro->invoke_cb = SvREFCNT_inc (cb);
3431 coro->invoke_av = av;
3432 }
3433
3434 api_ready (aTHX_ (SV *)hv);
3435
3436 if (GIMME_V != G_VOID)
3437 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3438 else
1942 SvREFCNT_dec (invoke); 3439 SvREFCNT_dec (hv);
1943} 3440}
1944 3441
1945void 3442SV *
1946_pool_2 (SV *cb) 3443rouse_cb ()
3444 PROTOTYPE:
1947 CODE: 3445 CODE:
1948{ 3446 RETVAL = coro_new_rouse_cb (aTHX);
1949 struct coro *coro = SvSTATE (coro_current);
1950
1951 sv_setsv (cb, &PL_sv_undef);
1952
1953 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1954 coro->saved_deffh = 0;
1955
1956 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1957 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1958 croak ("\3async_pool terminate\2\n");
1959
1960 av_clear (GvAV (PL_defgv));
1961 hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
1962 newSVpvn (strpair ("[async_pool idle]")), 0);
1963
1964 coro->prio = 0;
1965
1966 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1967 api_trace (coro_current, 0);
1968
1969 av_push (av_async_pool, newSVsv (coro_current));
1970}
1971
1972
1973MODULE = Coro::State PACKAGE = Coro::AIO
1974
1975SV *
1976_get_state ()
1977 CODE:
1978{
1979 struct io_state *data;
1980
1981 RETVAL = newSV (sizeof (struct io_state));
1982 data = (struct io_state *)SvPVX (RETVAL);
1983 SvCUR_set (RETVAL, sizeof (struct io_state));
1984 SvPOK_only (RETVAL);
1985
1986 data->errorno = errno;
1987 data->laststype = PL_laststype;
1988 data->laststatval = PL_laststatval;
1989 data->statcache = PL_statcache;
1990}
1991 OUTPUT: 3447 OUTPUT:
1992 RETVAL 3448 RETVAL
1993 3449
1994void 3450void
1995_set_state (char *data_) 3451rouse_wait (...)
3452 PROTOTYPE: ;$
3453 PPCODE:
3454 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3455
3456void
3457on_enter (SV *block)
3458 ALIAS:
3459 on_leave = 1
1996 PROTOTYPE: $ 3460 PROTOTYPE: &
1997 CODE: 3461 CODE:
1998{ 3462{
1999 struct io_state *data = (void *)data_; 3463 struct coro *coro = SvSTATE_current;
3464 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2000 3465
2001 errno = data->errorno; 3466 block = (SV *)coro_sv_2cv (aTHX_ block);
2002 PL_laststype = data->laststype;
2003 PL_laststatval = data->laststatval;
2004 PL_statcache = data->statcache;
2005}
2006 3467
3468 if (!*avp)
3469 *avp = newAV ();
3470
3471 av_push (*avp, SvREFCNT_inc (block));
3472
3473 if (!ix)
3474 on_enterleave_call (aTHX_ block);
3475
3476 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3477 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3478 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3479}
3480
3481
3482MODULE = Coro::State PACKAGE = PerlIO::cede
3483
3484BOOT:
3485 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3486
3487
3488MODULE = Coro::State PACKAGE = Coro::Semaphore
3489
3490SV *
3491new (SV *klass, SV *count = 0)
3492 CODE:
3493{
3494 int semcnt = 1;
3495
3496 if (count)
3497 {
3498 SvGETMAGIC (count);
3499
3500 if (SvOK (count))
3501 semcnt = SvIV (count);
3502 }
3503
3504 RETVAL = sv_bless (
3505 coro_waitarray_new (aTHX_ semcnt),
3506 GvSTASH (CvGV (cv))
3507 );
3508}
3509 OUTPUT:
3510 RETVAL
3511
3512# helper for Coro::Channel and others
3513SV *
3514_alloc (int count)
3515 CODE:
3516 RETVAL = coro_waitarray_new (aTHX_ count);
3517 OUTPUT:
3518 RETVAL
3519
3520SV *
3521count (SV *self)
3522 CODE:
3523 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3524 OUTPUT:
3525 RETVAL
3526
3527void
3528up (SV *self, int adjust = 1)
3529 ALIAS:
3530 adjust = 1
3531 CODE:
3532 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3533
3534void
3535down (...)
3536 CODE:
3537 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3538
3539void
3540wait (...)
3541 CODE:
3542 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3543
3544void
3545try (SV *self)
3546 PPCODE:
3547{
3548 AV *av = (AV *)SvRV (self);
3549 SV *count_sv = AvARRAY (av)[0];
3550 IV count = SvIVX (count_sv);
3551
3552 if (count > 0)
3553 {
3554 --count;
3555 SvIVX (count_sv) = count;
3556 XSRETURN_YES;
3557 }
3558 else
3559 XSRETURN_NO;
3560}
3561
3562void
3563waiters (SV *self)
3564 PPCODE:
3565{
3566 AV *av = (AV *)SvRV (self);
3567 int wcount = AvFILLp (av) + 1 - 1;
3568
3569 if (GIMME_V == G_SCALAR)
3570 XPUSHs (sv_2mortal (newSViv (wcount)));
3571 else
3572 {
3573 int i;
3574 EXTEND (SP, wcount);
3575 for (i = 1; i <= wcount; ++i)
3576 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3577 }
3578}
3579
3580MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3581
3582void
3583_may_delete (SV *sem, int count, int extra_refs)
3584 PPCODE:
3585{
3586 AV *av = (AV *)SvRV (sem);
3587
3588 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3589 && AvFILLp (av) == 0 /* no waiters, just count */
3590 && SvIV (AvARRAY (av)[0]) == count)
3591 XSRETURN_YES;
3592
3593 XSRETURN_NO;
3594}
3595
3596MODULE = Coro::State PACKAGE = Coro::Signal
3597
3598SV *
3599new (SV *klass)
3600 CODE:
3601 RETVAL = sv_bless (
3602 coro_waitarray_new (aTHX_ 0),
3603 GvSTASH (CvGV (cv))
3604 );
3605 OUTPUT:
3606 RETVAL
3607
3608void
3609wait (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3612
3613void
3614broadcast (SV *self)
3615 CODE:
3616{
3617 AV *av = (AV *)SvRV (self);
3618 coro_signal_wake (aTHX_ av, AvFILLp (av));
3619}
3620
3621void
3622send (SV *self)
3623 CODE:
3624{
3625 AV *av = (AV *)SvRV (self);
3626
3627 if (AvFILLp (av))
3628 coro_signal_wake (aTHX_ av, 1);
3629 else
3630 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3631}
3632
3633IV
3634awaited (SV *self)
3635 CODE:
3636 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3637 OUTPUT:
3638 RETVAL
3639
3640
3641MODULE = Coro::State PACKAGE = Coro::AnyEvent
3642
3643BOOT:
3644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3645
3646void
3647_schedule (...)
3648 CODE:
3649{
3650 static int incede;
3651
3652 api_cede_notself (aTHX);
3653
3654 ++incede;
3655 while (coro_nready >= incede && api_cede (aTHX))
3656 ;
3657
3658 sv_setsv (sv_activity, &PL_sv_undef);
3659 if (coro_nready >= incede)
3660 {
3661 PUSHMARK (SP);
3662 PUTBACK;
3663 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3664 }
3665
3666 --incede;
3667}
3668
3669
3670MODULE = Coro::State PACKAGE = Coro::AIO
3671
3672void
3673_register (char *target, char *proto, SV *req)
3674 CODE:
3675{
3676 CV *req_cv = coro_sv_2cv (aTHX_ req);
3677 /* newXSproto doesn't return the CV on 5.8 */
3678 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3679 sv_setpv ((SV *)slf_cv, proto);
3680 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3681}
3682

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines