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Comparing Coro/Coro/State.xs (file contents):
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC vs.
Revision 1.371 by root, Sat Aug 22 22:36:23 2009 UTC

… …
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#include "perliol.h"
10 10
11#include "patchlevel.h" 11#include "schmorp.h"
12 12
13#include <stdio.h> 13#include <stdio.h>
14#include <errno.h> 14#include <errno.h>
15#include <assert.h> 15#include <assert.h>
16 16
17#ifdef WIN32 17#ifdef WIN32
18# undef setjmp 18# undef setjmp
19# undef longjmp 19# undef longjmp
20# undef _exit 20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
22#else 22#else
23# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif 24#endif
25 25
26#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */
100#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
103 55
104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
105# undef CORO_STACKGUARD 57# undef CORO_STACKGUARD
106#endif 58#endif
107 59
… …
114# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif 67#endif
116 68
117/* The next macros try to return the current stack pointer, in an as 69/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */ 70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
119#define dSTACKLEVEL volatile char stacklevel 75# define dSTACKLEVEL volatile void *stacklevel
120#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
121 78
122#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
123 80
124#if __GNUC__ >= 3 81#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value)) 83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
128#else 85#else
129# define attribute(x) 86# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr) 87# define expect(expr,value) (expr)
88# define INLINE static
132#endif 89#endif
133 90
134#define expect_false(expr) expect ((expr) != 0, 0) 91#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1) 92#define expect_true(expr) expect ((expr) != 0, 1)
136 93
137#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
138 95
139#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
140 98
141#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
142static perl_mutex coro_mutex; 100# if CORO_PTHREAD
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif 103#endif
149 104
150/* helper storage struct for Coro::AIO */ 105#ifdef __linux
151struct io_state 106# include <time.h> /* for timespec */
152{ 107# include <syscall.h> /* for SYS_* */
153 AV *res; 108# ifdef SYS_clock_gettime
154 int errorno; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
155 I32 laststype; 110# define CORO_CLOCK_MONOTONIC 1
156 int laststatval; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
157 Stat_t statcache; 112# endif
158}; 113#endif
159 114
160static double (*nvtime)(); /* so why doesn't it take void? */ 115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
161 117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
162static size_t coro_stacksize = CORO_STACKSIZE; 123static size_t cctx_stacksize = CORO_STACKSIZE;
163static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
164static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env; 126static JMPENV *main_top_env;
166static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
167static volatile SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
129
130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
168 133
169static GV *irsgv; /* $/ */ 134static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */ 135static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook; 136static SV *rv_diehook;
172static SV *rv_warnhook; 137static SV *rv_warnhook;
173static HV *hv_sig; /* %SIG */ 138static HV *hv_sig; /* %SIG */
174 139
175/* async_pool helper stuff */ 140/* async_pool helper stuff */
176static SV *sv_pool_rss; 141static SV *sv_pool_rss;
177static SV *sv_pool_size; 142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
178static AV *av_async_pool; 144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
179 147
180/* Coro::AnyEvent */ 148/* Coro::AnyEvent */
181static SV *sv_activity; 149static SV *sv_activity;
150
151/* enable processtime/realtime profiling */
152static char enable_times;
153typedef U32 coro_ts[2];
154static coro_ts time_real, time_cpu;
155static char times_valid;
182 156
183static struct coro_cctx *cctx_first; 157static struct coro_cctx *cctx_first;
184static int cctx_count, cctx_idle; 158static int cctx_count, cctx_idle;
185 159
186enum { 160enum {
… …
191 CC_TRACE_LINE = 0x10, /* trace each statement */ 165 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193}; 167};
194 168
195/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
196typedef struct coro_cctx { 170typedef struct coro_cctx
171{
197 struct coro_cctx *next; 172 struct coro_cctx *next;
198 173
199 /* the stack */ 174 /* the stack */
200 void *sptr; 175 void *sptr;
201 size_t ssize; 176 size_t ssize;
… …
204 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
205 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
206 JMPENV *top_env; 181 JMPENV *top_env;
207 coro_context cctx; 182 coro_context cctx;
208 183
184 U32 gen;
209#if CORO_USE_VALGRIND 185#if CORO_USE_VALGRIND
210 int valgrind_id; 186 int valgrind_id;
211#endif 187#endif
212 unsigned char flags; 188 unsigned char flags;
213} coro_cctx; 189} coro_cctx;
214 190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
215enum { 195enum {
216 CF_RUNNING = 0x0001, /* coroutine is running */ 196 CF_RUNNING = 0x0001, /* coroutine is running */
217 CF_READY = 0x0002, /* coroutine is ready */ 197 CF_READY = 0x0002, /* coroutine is ready */
218 CF_NEW = 0x0004, /* has never been switched to */ 198 CF_NEW = 0x0004, /* has never been switched to */
219 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
220}; 201};
221 202
222/* the structure where most of the perl state is stored, overlaid on the cxstack */ 203/* the structure where most of the perl state is stored, overlaid on the cxstack */
223typedef struct { 204typedef struct
205{
224 SV *defsv; 206 SV *defsv;
225 AV *defav; 207 AV *defav;
226 SV *errsv; 208 SV *errsv;
227 SV *irsgv; 209 SV *irsgv;
210 HV *hinthv;
228#define VAR(name,type) type name; 211#define VAR(name,type) type name;
229# include "state.h" 212# include "state.h"
230#undef VAR 213#undef VAR
231} perl_slots; 214} perl_slots;
232 215
233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
234 217
235/* this is a structure representing a perl-level coroutine */ 218/* this is a structure representing a perl-level coroutine */
236struct coro { 219struct coro {
237 /* the c coroutine allocated to this perl coroutine, if any */ 220 /* the C coroutine allocated to this perl coroutine, if any */
238 coro_cctx *cctx; 221 coro_cctx *cctx;
239 222
240 /* process data */ 223 /* ready queue */
224 struct coro *next_ready;
225
226 /* state data */
227 struct CoroSLF slf_frame; /* saved slf frame */
241 AV *mainstack; 228 AV *mainstack;
242 perl_slots *slot; /* basically the saved sp */ 229 perl_slots *slot; /* basically the saved sp */
243 230
231 CV *startcv; /* the CV to execute */
244 AV *args; /* data associated with this coroutine (initial args) */ 232 AV *args; /* data associated with this coroutine (initial args) */
245 int refcnt; /* coroutines are refcounted, yes */ 233 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */ 234 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */ 235 HV *hv; /* the perl hash associated with this coro, if any */
236 void (*on_destroy)(pTHX_ struct coro *coro);
248 237
249 /* statistics */ 238 /* statistics */
250 int usecount; /* number of transfers to this coro */ 239 int usecount; /* number of transfers to this coro */
251 240
252 /* coro process data */ 241 /* coro process data */
253 int prio; 242 int prio;
254 SV *throw; /* exception to be thrown */ 243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
255 245
256 /* async_pool */ 246 /* async_pool */
257 SV *saved_deffh; 247 SV *saved_deffh;
248 SV *invoke_cb;
249 AV *invoke_av;
250
251 /* on_enter/on_leave */
252 AV *on_enter;
253 AV *on_leave;
254
255 /* times */
256 coro_ts t_cpu, t_real;
258 257
259 /* linked list */ 258 /* linked list */
260 struct coro *next, *prev; 259 struct coro *next, *prev;
261}; 260};
262 261
263typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
264typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
265 264
265/* the following variables are effectively part of the perl context */
266/* and get copied between struct coro and these variables */
267/* the mainr easonw e don't support windows process emulation */
268static struct CoroSLF slf_frame; /* the current slf frame */
269
266/** Coro ********************************************************************/ 270/** Coro ********************************************************************/
267 271
268#define PRIO_MAX 3 272#define CORO_PRIO_MAX 3
269#define PRIO_HIGH 1 273#define CORO_PRIO_HIGH 1
270#define PRIO_NORMAL 0 274#define CORO_PRIO_NORMAL 0
271#define PRIO_LOW -1 275#define CORO_PRIO_LOW -1
272#define PRIO_IDLE -3 276#define CORO_PRIO_IDLE -3
273#define PRIO_MIN -4 277#define CORO_PRIO_MIN -4
274 278
275/* for Coro.pm */ 279/* for Coro.pm */
276static SV *coro_current; 280static SV *coro_current;
277static SV *coro_readyhook; 281static SV *coro_readyhook;
278static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
279static int coro_nready; 283static CV *cv_coro_run, *cv_coro_terminate;
280static struct coro *coro_first; 284static struct coro *coro_first;
285#define coro_nready coroapi.nready
286
287/** Coro::Select ************************************************************/
288
289static OP *(*coro_old_pp_sselect) (pTHX);
290static SV *coro_select_select;
291
292/* horrible hack, but if it works... */
293static OP *
294coro_pp_sselect (pTHX)
295{
296 dSP;
297 PUSHMARK (SP - 4); /* fake argument list */
298 XPUSHs (coro_select_select);
299 PUTBACK;
300
301 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
302 PL_op->op_flags |= OPf_STACKED;
303 PL_op->op_private = 0;
304 return PL_ppaddr [OP_ENTERSUB](aTHX);
305}
281 306
282/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
283 308
284static SV * 309static SV *
285coro_get_sv (pTHX_ const char *name, int create) 310coro_get_sv (pTHX_ const char *name, int create)
… …
309 get_hv (name, create); 334 get_hv (name, create);
310#endif 335#endif
311 return get_hv (name, create); 336 return get_hv (name, create);
312} 337}
313 338
339INLINE void
340coro_times_update ()
341{
342#ifdef coro_clock_gettime
343 struct timespec ts;
344
345 ts.tv_sec = ts.tv_nsec = 0;
346 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
347 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
348
349 ts.tv_sec = ts.tv_nsec = 0;
350 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
351 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
352#else
353 dTHX;
354 UV tv[2];
355
356 u2time (aTHX_ tv);
357 time_real [0] = tv [0];
358 time_real [1] = tv [1] * 1000;
359#endif
360}
361
362INLINE void
363coro_times_add (struct coro *c)
364{
365 c->t_real [1] += time_real [1];
366 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
367 c->t_real [0] += time_real [0];
368
369 c->t_cpu [1] += time_cpu [1];
370 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
371 c->t_cpu [0] += time_cpu [0];
372}
373
374INLINE void
375coro_times_sub (struct coro *c)
376{
377 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
378 c->t_real [1] -= time_real [1];
379 c->t_real [0] -= time_real [0];
380
381 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
382 c->t_cpu [1] -= time_cpu [1];
383 c->t_cpu [0] -= time_cpu [0];
384}
385
386/*****************************************************************************/
387/* magic glue */
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392#define CORO_MAGIC_NN(sv, type) \
393 (expect_true (SvMAGIC (sv)->mg_type == type) \
394 ? SvMAGIC (sv) \
395 : mg_find (sv, type))
396
397#define CORO_MAGIC(sv, type) \
398 (expect_true (SvMAGIC (sv)) \
399 ? CORO_MAGIC_NN (sv, type) \
400 : 0)
401
402#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
403#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
404
405INLINE struct coro *
406SvSTATE_ (pTHX_ SV *coro)
407{
408 HV *stash;
409 MAGIC *mg;
410
411 if (SvROK (coro))
412 coro = SvRV (coro);
413
414 if (expect_false (SvTYPE (coro) != SVt_PVHV))
415 croak ("Coro::State object required");
416
417 stash = SvSTASH (coro);
418 if (expect_false (stash != coro_stash && stash != coro_state_stash))
419 {
420 /* very slow, but rare, check */
421 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
422 croak ("Coro::State object required");
423 }
424
425 mg = CORO_MAGIC_state (coro);
426 return (struct coro *)mg->mg_ptr;
427}
428
429#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
430
431/* faster than SvSTATE, but expects a coroutine hv */
432#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
433#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
434
435/*****************************************************************************/
436/* padlist management and caching */
437
314static AV * 438static AV *
315coro_clone_padlist (pTHX_ CV *cv) 439coro_derive_padlist (pTHX_ CV *cv)
316{ 440{
317 AV *padlist = CvPADLIST (cv); 441 AV *padlist = CvPADLIST (cv);
318 AV *newpadlist, *newpad; 442 AV *newpadlist, *newpad;
319 443
320 newpadlist = newAV (); 444 newpadlist = newAV ();
… …
325 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
326#endif 450#endif
327 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
328 --AvFILLp (padlist); 452 --AvFILLp (padlist);
329 453
330 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
331 av_store (newpadlist, 1, (SV *)newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
332 456
333 return newpadlist; 457 return newpadlist;
334} 458}
335 459
336static void 460static void
337free_padlist (pTHX_ AV *padlist) 461free_padlist (pTHX_ AV *padlist)
338{ 462{
339 /* may be during global destruction */ 463 /* may be during global destruction */
340 if (SvREFCNT (padlist)) 464 if (!IN_DESTRUCT)
341 { 465 {
342 I32 i = AvFILLp (padlist); 466 I32 i = AvFILLp (padlist);
343 while (i >= 0) 467
468 while (i > 0) /* special-case index 0 */
344 { 469 {
345 SV **svp = av_fetch (padlist, i--, FALSE); 470 /* we try to be extra-careful here */
346 if (svp) 471 AV *av = (AV *)AvARRAY (padlist)[i--];
347 { 472 I32 j = AvFILLp (av);
348 SV *sv; 473
349 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 474 while (j >= 0)
475 SvREFCNT_dec (AvARRAY (av)[j--]);
476
477 AvFILLp (av) = -1;
350 SvREFCNT_dec (sv); 478 SvREFCNT_dec (av);
351
352 SvREFCNT_dec (*svp);
353 }
354 } 479 }
355 480
481 SvREFCNT_dec (AvARRAY (padlist)[0]);
482
483 AvFILLp (padlist) = -1;
356 SvREFCNT_dec ((SV*)padlist); 484 SvREFCNT_dec ((SV*)padlist);
357 } 485 }
358} 486}
359 487
360static int 488static int
361coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
362{ 490{
363 AV *padlist; 491 AV *padlist;
364 AV *av = (AV *)mg->mg_obj; 492 AV *av = (AV *)mg->mg_obj;
493
494 /* perl manages to free our internal AV and _then_ call us */
495 if (IN_DESTRUCT)
496 return 0;
365 497
366 /* casting is fun. */ 498 /* casting is fun. */
367 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
368 free_padlist (aTHX_ padlist); 500 free_padlist (aTHX_ padlist);
369 501
370 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
371 503
372 return 0; 504 return 0;
373} 505}
374
375#define CORO_MAGIC_type_cv PERL_MAGIC_ext
376#define CORO_MAGIC_type_state PERL_MAGIC_ext
377 506
378static MGVTBL coro_cv_vtbl = { 507static MGVTBL coro_cv_vtbl = {
379 0, 0, 0, 0, 508 0, 0, 0, 0,
380 coro_cv_free 509 coro_cv_free
381}; 510};
382
383#define CORO_MAGIC(sv,type) \
384 SvMAGIC (sv) \
385 ? SvMAGIC (sv)->mg_type == type \
386 ? SvMAGIC (sv) \
387 : mg_find (sv, type) \
388 : 0
389
390#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
391#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
392
393static struct coro *
394SvSTATE_ (pTHX_ SV *coro)
395{
396 HV *stash;
397 MAGIC *mg;
398
399 if (SvROK (coro))
400 coro = SvRV (coro);
401
402 if (expect_false (SvTYPE (coro) != SVt_PVHV))
403 croak ("Coro::State object required");
404
405 stash = SvSTASH (coro);
406 if (expect_false (stash != coro_stash && stash != coro_state_stash))
407 {
408 /* very slow, but rare, check */
409 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
410 croak ("Coro::State object required");
411 }
412
413 mg = CORO_MAGIC_state (coro);
414 return (struct coro *)mg->mg_ptr;
415}
416
417#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
418 511
419/* the next two functions merely cache the padlists */ 512/* the next two functions merely cache the padlists */
420static void 513static void
421get_padlist (pTHX_ CV *cv) 514get_padlist (pTHX_ CV *cv)
422{ 515{
… …
428 else 521 else
429 { 522 {
430#if CORO_PREFER_PERL_FUNCTIONS 523#if CORO_PREFER_PERL_FUNCTIONS
431 /* this is probably cleaner? but also slower! */ 524 /* this is probably cleaner? but also slower! */
432 /* in practise, it seems to be less stable */ 525 /* in practise, it seems to be less stable */
433 CV *cp = Perl_cv_clone (cv); 526 CV *cp = Perl_cv_clone (aTHX_ cv);
434 CvPADLIST (cv) = CvPADLIST (cp); 527 CvPADLIST (cv) = CvPADLIST (cp);
435 CvPADLIST (cp) = 0; 528 CvPADLIST (cp) = 0;
436 SvREFCNT_dec (cp); 529 SvREFCNT_dec (cp);
437#else 530#else
438 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
439#endif 532#endif
440 } 533 }
441} 534}
442 535
443static void 536static void
… …
450 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
451 544
452 av = (AV *)mg->mg_obj; 545 av = (AV *)mg->mg_obj;
453 546
454 if (expect_false (AvFILLp (av) >= AvMAX (av))) 547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
455 av_extend (av, AvMAX (av) + 1); 548 av_extend (av, AvFILLp (av) + 1);
456 549
457 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
458} 551}
459 552
460/** load & save, init *******************************************************/ 553/** load & save, init *******************************************************/
554
555static void
556on_enterleave_call (pTHX_ SV *cb);
461 557
462static void 558static void
463load_perl (pTHX_ Coro__State c) 559load_perl (pTHX_ Coro__State c)
464{ 560{
465 perl_slots *slot = c->slot; 561 perl_slots *slot = c->slot;
466 c->slot = 0; 562 c->slot = 0;
467 563
468 PL_mainstack = c->mainstack; 564 PL_mainstack = c->mainstack;
469 565
470 GvSV (PL_defgv) = slot->defsv; 566 GvSV (PL_defgv) = slot->defsv;
471 GvAV (PL_defgv) = slot->defav; 567 GvAV (PL_defgv) = slot->defav;
472 GvSV (PL_errgv) = slot->errsv; 568 GvSV (PL_errgv) = slot->errsv;
473 GvSV (irsgv) = slot->irsgv; 569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
474 571
475 #define VAR(name,type) PL_ ## name = slot->name; 572 #define VAR(name,type) PL_ ## name = slot->name;
476 # include "state.h" 573 # include "state.h"
477 #undef VAR 574 #undef VAR
478 575
… …
489 CvPADLIST (cv) = (AV *)POPs; 586 CvPADLIST (cv) = (AV *)POPs;
490 } 587 }
491 588
492 PUTBACK; 589 PUTBACK;
493 } 590 }
591
592 slf_frame = c->slf_frame;
593 CORO_THROW = c->except;
594
595 if (expect_false (enable_times))
596 {
597 if (expect_false (!times_valid))
598 coro_times_update ();
599
600 coro_times_sub (c);
601 }
602
603 if (expect_false (c->on_enter))
604 {
605 int i;
606
607 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
608 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
609 }
494} 610}
495 611
496static void 612static void
497save_perl (pTHX_ Coro__State c) 613save_perl (pTHX_ Coro__State c)
498{ 614{
615 if (expect_false (c->on_leave))
616 {
617 int i;
618
619 for (i = AvFILLp (c->on_leave); i >= 0; --i)
620 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
621 }
622
623 times_valid = 0;
624
625 if (expect_false (enable_times))
626 {
627 coro_times_update (); times_valid = 1;
628 coro_times_add (c);
629 }
630
631 c->except = CORO_THROW;
632 c->slf_frame = slf_frame;
633
499 { 634 {
500 dSP; 635 dSP;
501 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
502 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
503 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
513 { 648 {
514 while (expect_true (cxix >= 0)) 649 while (expect_true (cxix >= 0))
515 { 650 {
516 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
517 652
518 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 653 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
519 { 654 {
520 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
521 656
522 if (expect_true (CvDEPTH (cv))) 657 if (expect_true (CvDEPTH (cv)))
523 { 658 {
… …
547 /* we manually unroll here, as usually 2 slots is enough */ 682 /* we manually unroll here, as usually 2 slots is enough */
548 if (SLOT_COUNT >= 1) CXINC; 683 if (SLOT_COUNT >= 1) CXINC;
549 if (SLOT_COUNT >= 2) CXINC; 684 if (SLOT_COUNT >= 2) CXINC;
550 if (SLOT_COUNT >= 3) CXINC; 685 if (SLOT_COUNT >= 3) CXINC;
551 { 686 {
552 int i; 687 unsigned int i;
553 for (i = 3; i < SLOT_COUNT; ++i) 688 for (i = 3; i < SLOT_COUNT; ++i)
554 CXINC; 689 CXINC;
555 } 690 }
556 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
557 692
558 c->mainstack = PL_mainstack; 693 c->mainstack = PL_mainstack;
559 694
560 { 695 {
561 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
562 697
563 slot->defav = GvAV (PL_defgv); 698 slot->defav = GvAV (PL_defgv);
564 slot->defsv = DEFSV; 699 slot->defsv = DEFSV;
565 slot->errsv = ERRSV; 700 slot->errsv = ERRSV;
566 slot->irsgv = GvSV (irsgv); 701 slot->irsgv = GvSV (irsgv);
702 slot->hinthv = GvHV (PL_hintgv);
567 703
568 #define VAR(name,type) slot->name = PL_ ## name; 704 #define VAR(name,type) slot->name = PL_ ## name;
569 # include "state.h" 705 # include "state.h"
570 #undef VAR 706 #undef VAR
571 } 707 }
572} 708}
573 709
574/* 710/*
575 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
576 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
577 * on the (sometimes correct) assumption that coroutines do 713 * on the (sometimes correct) assumption that coroutines do
578 * not usually need a lot of stackspace. 714 * not usually need a lot of stackspace.
579 */ 715 */
580#if CORO_PREFER_PERL_FUNCTIONS 716#if CORO_PREFER_PERL_FUNCTIONS
581# define coro_init_stacks init_stacks 717# define coro_init_stacks(thx) init_stacks ()
582#else 718#else
583static void 719static void
584coro_init_stacks (pTHX) 720coro_init_stacks (pTHX)
585{ 721{
586 PL_curstackinfo = new_stackinfo(32, 8); 722 PL_curstackinfo = new_stackinfo(32, 8);
… …
623 759
624/* 760/*
625 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
626 */ 762 */
627static void 763static void
628coro_destroy_stacks (pTHX) 764coro_destruct_stacks (pTHX)
629{ 765{
630 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
631 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
632 768
633 while (PL_curstackinfo) 769 while (PL_curstackinfo)
… …
649#if !PERL_VERSION_ATLEAST (5,10,0) 785#if !PERL_VERSION_ATLEAST (5,10,0)
650 Safefree (PL_retstack); 786 Safefree (PL_retstack);
651#endif 787#endif
652} 788}
653 789
790#define CORO_RSS \
791 rss += sizeof (SYM (curstackinfo)); \
792 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
793 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
794 rss += SYM (tmps_max) * sizeof (SV *); \
795 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
796 rss += SYM (scopestack_max) * sizeof (I32); \
797 rss += SYM (savestack_max) * sizeof (ANY);
798
654static size_t 799static size_t
655coro_rss (pTHX_ struct coro *coro) 800coro_rss (pTHX_ struct coro *coro)
656{ 801{
657 size_t rss = sizeof (*coro); 802 size_t rss = sizeof (*coro);
658 803
659 if (coro->mainstack) 804 if (coro->mainstack)
660 { 805 {
661 perl_slots tmp_slot;
662 perl_slots *slot;
663
664 if (coro->flags & CF_RUNNING) 806 if (coro->flags & CF_RUNNING)
665 { 807 {
666 slot = &tmp_slot; 808 #define SYM(sym) PL_ ## sym
667 809 CORO_RSS;
668 #define VAR(name,type) slot->name = PL_ ## name;
669 # include "state.h"
670 #undef VAR 810 #undef SYM
671 } 811 }
672 else 812 else
673 slot = coro->slot;
674
675 if (slot)
676 { 813 {
677 rss += sizeof (slot->curstackinfo); 814 #define SYM(sym) coro->slot->sym
678 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 815 CORO_RSS;
679 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 816 #undef SYM
680 rss += slot->tmps_max * sizeof (SV *);
681 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
682 rss += slot->scopestack_max * sizeof (I32);
683 rss += slot->savestack_max * sizeof (ANY);
684
685#if !PERL_VERSION_ATLEAST (5,10,0)
686 rss += slot->retstack_max * sizeof (OP *);
687#endif
688 } 817 }
689 } 818 }
690 819
691 return rss; 820 return rss;
692} 821}
… …
705#endif 834#endif
706 835
707/* 836/*
708 * This overrides the default magic get method of %SIG elements. 837 * This overrides the default magic get method of %SIG elements.
709 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
710 * and instead of tryign to save and restore the hash elements, we just provide 839 * and instead of trying to save and restore the hash elements, we just provide
711 * readback here. 840 * readback here.
712 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
713 * not expecting this to actually change the hook. This is a potential problem
714 * when a schedule happens then, but we ignore this.
715 */ 841 */
716static int 842static int
717coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
718{ 844{
719 const char *s = MgPV_nolen_const (mg); 845 const char *s = MgPV_nolen_const (mg);
… …
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773 899
774 if (svp) 900 if (svp)
775 { 901 {
776 SV *old = *svp; 902 SV *old = *svp;
777 *svp = newSVsv (sv); 903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
778 SvREFCNT_dec (old); 904 SvREFCNT_dec (old);
779 return 0; 905 return 0;
780 } 906 }
781 } 907 }
782 908
783 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
784} 910}
785 911
786static void 912static void
913prepare_nop (pTHX_ struct coro_transfer_args *ta)
914{
915 /* kind of mega-hacky, but works */
916 ta->next = ta->prev = (struct coro *)ta;
917}
918
919static int
920slf_check_nop (pTHX_ struct CoroSLF *frame)
921{
922 return 0;
923}
924
925static int
926slf_check_repeat (pTHX_ struct CoroSLF *frame)
927{
928 return 1;
929}
930
931static UNOP coro_setup_op;
932
933static void NOINLINE /* noinline to keep it out of the transfer fast path */
787coro_setup (pTHX_ struct coro *coro) 934coro_setup (pTHX_ struct coro *coro)
788{ 935{
789 /* 936 /*
790 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
791 */ 938 */
… …
793 940
794 PL_runops = RUNOPS_DEFAULT; 941 PL_runops = RUNOPS_DEFAULT;
795 PL_curcop = &PL_compiling; 942 PL_curcop = &PL_compiling;
796 PL_in_eval = EVAL_NULL; 943 PL_in_eval = EVAL_NULL;
797 PL_comppad = 0; 944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
798 PL_curpm = 0; 948 PL_curpm = 0;
799 PL_curpad = 0; 949 PL_curpad = 0;
800 PL_localizing = 0; 950 PL_localizing = 0;
801 PL_dirty = 0; 951 PL_dirty = 0;
802 PL_restartop = 0; 952 PL_restartop = 0;
803#if PERL_VERSION_ATLEAST (5,10,0) 953#if PERL_VERSION_ATLEAST (5,10,0)
804 PL_parser = 0; 954 PL_parser = 0;
805#endif 955#endif
956 PL_hints = 0;
806 957
807 /* recreate the die/warn hooks */ 958 /* recreate the die/warn hooks */
808 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
809 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
810 961
811 GvSV (PL_defgv) = newSV (0); 962 GvSV (PL_defgv) = newSV (0);
812 GvAV (PL_defgv) = coro->args; coro->args = 0; 963 GvAV (PL_defgv) = coro->args; coro->args = 0;
813 GvSV (PL_errgv) = newSV (0); 964 GvSV (PL_errgv) = newSV (0);
814 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 965 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
966 GvHV (PL_hintgv) = 0;
815 PL_rs = newSVsv (GvSV (irsgv)); 967 PL_rs = newSVsv (GvSV (irsgv));
816 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
817 969
818 { 970 {
819 dSP; 971 dSP;
820 LOGOP myop; 972 UNOP myop;
821 973
822 Zero (&myop, 1, LOGOP); 974 Zero (&myop, 1, UNOP);
823 myop.op_next = Nullop; 975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
824 myop.op_flags = OPf_WANT_VOID; 977 myop.op_flags = OPf_WANT_VOID;
825 978
826 PUSHMARK (SP); 979 PUSHMARK (SP);
827 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 980 PUSHs ((SV *)coro->startcv);
828 PUTBACK; 981 PUTBACK;
829 PL_op = (OP *)&myop; 982 PL_op = (OP *)&myop;
830 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
831 SPAGAIN;
832 } 984 }
833 985
834 /* this newly created coroutine might be run on an existing cctx which most 986 /* this newly created coroutine might be run on an existing cctx which most
835 * likely was suspended in set_stacklevel, called from entersub. 987 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
836 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837 * so we ENTER here for symmetry
838 */ 988 */
839 ENTER; 989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
840} 990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
841 991
992 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
993 coro_setup_op.op_next = PL_op;
994 coro_setup_op.op_type = OP_ENTERSUB;
995 coro_setup_op.op_ppaddr = pp_slf;
996 /* no flags etc. required, as an init function won't be called */
997
998 PL_op = (OP *)&coro_setup_op;
999
1000 /* copy throw, in case it was set before coro_setup */
1001 CORO_THROW = coro->except;
1002
1003 if (expect_false (enable_times))
1004 {
1005 coro_times_update ();
1006 coro_times_sub (coro);
1007 }
1008}
1009
842static void 1010static void
843coro_destroy (pTHX_ struct coro *coro) 1011coro_unwind_stacks (pTHX)
844{ 1012{
845 if (!IN_DESTRUCT) 1013 if (!IN_DESTRUCT)
846 { 1014 {
847 /* restore all saved variables and stuff */ 1015 /* restore all saved variables and stuff */
848 LEAVE_SCOPE (0); 1016 LEAVE_SCOPE (0);
… …
856 POPSTACK_TO (PL_mainstack); 1024 POPSTACK_TO (PL_mainstack);
857 1025
858 /* unwind main stack */ 1026 /* unwind main stack */
859 dounwind (-1); 1027 dounwind (-1);
860 } 1028 }
1029}
861 1030
862 SvREFCNT_dec (GvSV (PL_defgv)); 1031static void
863 SvREFCNT_dec (GvAV (PL_defgv)); 1032coro_destruct_perl (pTHX_ struct coro *coro)
864 SvREFCNT_dec (GvSV (PL_errgv)); 1033{
865 SvREFCNT_dec (PL_defoutgv); 1034 SV *svf [9];
866 SvREFCNT_dec (PL_rs);
867 SvREFCNT_dec (GvSV (irsgv));
868 1035
869 SvREFCNT_dec (PL_diehook);
870 SvREFCNT_dec (PL_warnhook);
871 1036 {
1037 struct coro *current = SvSTATE_current;
1038
1039 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1040
1041 save_perl (aTHX_ current);
1042 load_perl (aTHX_ coro);
1043
1044 coro_unwind_stacks (aTHX);
1045 coro_destruct_stacks (aTHX);
1046
1047 // now save some sv's to be free'd later
1048 svf [0] = GvSV (PL_defgv);
1049 svf [1] = (SV *)GvAV (PL_defgv);
1050 svf [2] = GvSV (PL_errgv);
1051 svf [3] = (SV *)PL_defoutgv;
1052 svf [4] = PL_rs;
1053 svf [5] = GvSV (irsgv);
1054 svf [6] = (SV *)GvHV (PL_hintgv);
1055 svf [7] = PL_diehook;
1056 svf [8] = PL_warnhook;
1057 assert (9 == sizeof (svf) / sizeof (*svf));
1058
1059 load_perl (aTHX_ current);
1060 }
1061
1062 {
1063 unsigned int i;
1064
1065 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1066 SvREFCNT_dec (svf [i]);
1067
872 SvREFCNT_dec (coro->saved_deffh); 1068 SvREFCNT_dec (coro->saved_deffh);
873 SvREFCNT_dec (coro->throw); 1069 SvREFCNT_dec (coro->rouse_cb);
874 1070 SvREFCNT_dec (coro->invoke_cb);
875 coro_destroy_stacks (aTHX); 1071 SvREFCNT_dec (coro->invoke_av);
1072 }
876} 1073}
877 1074
878static void 1075INLINE void
879free_coro_mortal (pTHX) 1076free_coro_mortal (pTHX)
880{ 1077{
881 if (expect_true (coro_mortal)) 1078 if (expect_true (coro_mortal))
882 { 1079 {
883 SvREFCNT_dec (coro_mortal); 1080 SvREFCNT_dec (coro_mortal);
… …
888static int 1085static int
889runops_trace (pTHX) 1086runops_trace (pTHX)
890{ 1087{
891 COP *oldcop = 0; 1088 COP *oldcop = 0;
892 int oldcxix = -2; 1089 int oldcxix = -2;
893 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
894 coro_cctx *cctx = coro->cctx;
895 1090
896 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
897 { 1092 {
898 PERL_ASYNC_CHECK (); 1093 PERL_ASYNC_CHECK ();
899 1094
900 if (cctx->flags & CC_TRACE_ALL) 1095 if (cctx_current->flags & CC_TRACE_ALL)
901 { 1096 {
902 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1097 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
903 { 1098 {
904 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
905 SV **bot, **top; 1100 SV **bot, **top;
906 AV *av = newAV (); /* return values */ 1101 AV *av = newAV (); /* return values */
907 SV **cb; 1102 SV **cb;
… …
944 1139
945 if (PL_curcop != &PL_compiling) 1140 if (PL_curcop != &PL_compiling)
946 { 1141 {
947 SV **cb; 1142 SV **cb;
948 1143
949 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
950 { 1145 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952 1147
953 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
954 { 1149 {
955 runops_proc_t old_runops = PL_runops;
956 dSP; 1150 dSP;
957 GV *gv = CvGV (cx->blk_sub.cv); 1151 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0)); 1152 SV *fullname = sv_2mortal (newSV (0));
959 1153
960 if (isGV (gv)) 1154 if (isGV (gv))
… …
965 SAVETMPS; 1159 SAVETMPS;
966 EXTEND (SP, 3); 1160 EXTEND (SP, 3);
967 PUSHMARK (SP); 1161 PUSHMARK (SP);
968 PUSHs (&PL_sv_yes); 1162 PUSHs (&PL_sv_yes);
969 PUSHs (fullname); 1163 PUSHs (fullname);
970 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1164 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
971 PUTBACK; 1165 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1166 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1167 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN; 1168 SPAGAIN;
975 FREETMPS; 1169 FREETMPS;
… …
978 } 1172 }
979 1173
980 oldcxix = cxstack_ix; 1174 oldcxix = cxstack_ix;
981 } 1175 }
982 1176
983 if (cctx->flags & CC_TRACE_LINE) 1177 if (cctx_current->flags & CC_TRACE_LINE)
984 { 1178 {
985 dSP; 1179 dSP;
986 1180
987 PL_runops = RUNOPS_DEFAULT; 1181 PL_runops = RUNOPS_DEFAULT;
988 ENTER; 1182 ENTER;
… …
1007 1201
1008 TAINT_NOT; 1202 TAINT_NOT;
1009 return 0; 1203 return 0;
1010} 1204}
1011 1205
1012/* inject a fake call to Coro::State::_cctx_init into the execution */ 1206static struct CoroSLF cctx_ssl_frame;
1013/* _cctx_init should be careful, as it could be called at almost any time */ 1207
1014/* during execution of a perl program */ 1208static void
1209slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1210{
1211 ta->prev = 0;
1212}
1213
1214static int
1215slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1216{
1217 *frame = cctx_ssl_frame;
1218
1219 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1220}
1221
1222/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1015static void NOINLINE 1223static void NOINLINE
1016cctx_prepare (pTHX_ coro_cctx *cctx) 1224cctx_prepare (pTHX)
1017{ 1225{
1018 dSP;
1019 LOGOP myop;
1020
1021 PL_top_env = &PL_start_env; 1226 PL_top_env = &PL_start_env;
1022 1227
1023 if (cctx->flags & CC_TRACE) 1228 if (cctx_current->flags & CC_TRACE)
1024 PL_runops = runops_trace; 1229 PL_runops = runops_trace;
1025 1230
1026 Zero (&myop, 1, LOGOP); 1231 /* we already must be executing an SLF op, there is no other valid way
1027 myop.op_next = PL_op; 1232 * that can lead to creation of a new cctx */
1028 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1233 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1234 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1029 1235
1030 PUSHMARK (SP); 1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1031 EXTEND (SP, 2); 1237 cctx_ssl_frame = slf_frame;
1032 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1238
1033 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1239 slf_frame.prepare = slf_prepare_set_stacklevel;
1034 PUTBACK; 1240 slf_frame.check = slf_check_set_stacklevel;
1035 PL_op = (OP *)&myop; 1241}
1036 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1242
1037 SPAGAIN; 1243/* the tail of transfer: execute stuff we can only do after a transfer */
1244INLINE void
1245transfer_tail (pTHX)
1246{
1247 free_coro_mortal (aTHX);
1038} 1248}
1039 1249
1040/* 1250/*
1041 * this is a _very_ stripped down perl interpreter ;) 1251 * this is a _very_ stripped down perl interpreter ;)
1042 */ 1252 */
1043static void 1253static void
1044cctx_run (void *arg) 1254cctx_run (void *arg)
1045{ 1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
1046 dTHX; 1262 dTHX;
1047 1263
1048 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1264 /* normally we would need to skip the entersub here */
1049 UNLOCK; 1265 /* not doing so will re-execute it, which is exactly what we want */
1050
1051 /* we now skip the entersub that lead to transfer() */
1052 PL_op = PL_op->op_next; 1266 /* PL_nop = PL_nop->op_next */
1053 1267
1054 /* inject a fake subroutine call to cctx_init */ 1268 /* inject a fake subroutine call to cctx_init */
1055 cctx_prepare (aTHX_ (coro_cctx *)arg); 1269 cctx_prepare (aTHX);
1056 1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
1057 /* somebody or something will hit me for both perl_run and PL_restartop */ 1274 /* somebody or something will hit me for both perl_run and PL_restartop */
1058 PL_restartop = PL_op; 1275 PL_restartop = PL_op;
1059 perl_run (PL_curinterp); 1276 perl_run (PL_curinterp);
1060
1061 /* 1277 /*
1278 * Unfortunately, there is no way to get at the return values of the
1279 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1280 * runtime errors here, as this is just a random interpreter, not a thread.
1281 */
1282
1283 /*
1062 * If perl-run returns we assume exit() was being called or the coro 1284 * If perl-run returns we assume exit() was being called or the coro
1063 * fell off the end, which seems to be the only valid (non-bug) 1285 * fell off the end, which seems to be the only valid (non-bug)
1064 * reason for perl_run to return. We try to exit by jumping to the 1286 * reason for perl_run to return. We try to exit by jumping to the
1065 * bootstrap-time "top" top_env, as we cannot restore the "main" 1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1066 * coroutine as Coro has no such concept 1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1067 */ 1291 */
1068 PL_top_env = main_top_env; 1292 PL_top_env = main_top_env;
1069 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
1070} 1295}
1071 1296
1072static coro_cctx * 1297static coro_cctx *
1073cctx_new () 1298cctx_new ()
1074{ 1299{
1075 coro_cctx *cctx; 1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1076 void *stack_start; 1329 void *stack_start;
1077 size_t stack_size; 1330 size_t stack_size;
1078 1331
1079 ++cctx_count;
1080
1081 Newz (0, cctx, 1, coro_cctx);
1082
1083#if HAVE_MMAP 1332#if HAVE_MMAP
1084 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1085 /* mmap supposedly does allocate-on-write for us */ 1334 /* mmap supposedly does allocate-on-write for us */
1086 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1087 1336
1088 if (cctx->sptr != (void *)-1) 1337 if (cctx->sptr != (void *)-1)
1089 { 1338 {
1090# if CORO_STACKGUARD 1339 #if CORO_STACKGUARD
1091 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1092# endif 1341 #endif
1093 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1094 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1095 cctx->flags |= CC_MAPPED; 1344 cctx->flags |= CC_MAPPED;
1096 } 1345 }
1097 else 1346 else
1098#endif 1347#endif
1099 { 1348 {
1100 cctx->ssize = coro_stacksize * (long)sizeof (long); 1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1101 New (0, cctx->sptr, coro_stacksize, long); 1350 New (0, cctx->sptr, cctx_stacksize, long);
1102 1351
1103 if (!cctx->sptr) 1352 if (!cctx->sptr)
1104 { 1353 {
1105 perror ("FATAL: unable to allocate stack for coroutine"); 1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1106 _exit (EXIT_FAILURE); 1355 _exit (EXIT_FAILURE);
1107 } 1356 }
1108 1357
1109 stack_start = cctx->sptr; 1358 stack_start = cctx->sptr;
1110 stack_size = cctx->ssize; 1359 stack_size = cctx->ssize;
1111 } 1360 }
1112 1361
1113 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1114 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1115 1367
1116 return cctx; 1368 return cctx;
1117} 1369}
1118 1370
… …
1120cctx_destroy (coro_cctx *cctx) 1372cctx_destroy (coro_cctx *cctx)
1121{ 1373{
1122 if (!cctx) 1374 if (!cctx)
1123 return; 1375 return;
1124 1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1125 --cctx_count; 1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1126 1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1127#if CORO_USE_VALGRIND 1385 #if CORO_USE_VALGRIND
1128 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
1129#endif 1393#endif
1130
1131#if HAVE_MMAP
1132 if (cctx->flags & CC_MAPPED)
1133 munmap (cctx->sptr, cctx->ssize);
1134 else
1135#endif
1136 Safefree (cctx->sptr); 1394 Safefree (cctx->sptr);
1395 }
1137 1396
1138 Safefree (cctx); 1397 Safefree (cctx);
1139} 1398}
1140 1399
1141/* wether this cctx should be destructed */ 1400/* wether this cctx should be destructed */
1142#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1143 1402
1144static coro_cctx * 1403static coro_cctx *
1145cctx_get (pTHX) 1404cctx_get (pTHX)
1146{ 1405{
1147 while (expect_true (cctx_first)) 1406 while (expect_true (cctx_first))
… …
1154 return cctx; 1413 return cctx;
1155 1414
1156 cctx_destroy (cctx); 1415 cctx_destroy (cctx);
1157 } 1416 }
1158 1417
1159 return cctx_new (); 1418 return cctx_new_run ();
1160} 1419}
1161 1420
1162static void 1421static void
1163cctx_put (coro_cctx *cctx) 1422cctx_put (coro_cctx *cctx)
1164{ 1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1165 /* free another cctx if overlimit */ 1426 /* free another cctx if overlimit */
1166 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1427 if (expect_false (cctx_idle >= cctx_max_idle))
1167 { 1428 {
1168 coro_cctx *first = cctx_first; 1429 coro_cctx *first = cctx_first;
1169 cctx_first = first->next; 1430 cctx_first = first->next;
1170 --cctx_idle; 1431 --cctx_idle;
1171 1432
… …
1180/** coroutine switching *****************************************************/ 1441/** coroutine switching *****************************************************/
1181 1442
1182static void 1443static void
1183transfer_check (pTHX_ struct coro *prev, struct coro *next) 1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1184{ 1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1185 if (expect_true (prev != next)) 1448 if (expect_true (prev != next))
1186 { 1449 {
1187 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1188 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1189 1452
1190 if (expect_false (next->flags & CF_RUNNING))
1191 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1192
1193 if (expect_false (next->flags & CF_DESTROYED)) 1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1194 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1195 1455
1196#if !PERL_VERSION_ATLEAST (5,10,0) 1456#if !PERL_VERSION_ATLEAST (5,10,0)
1197 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1198 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1199#endif 1459#endif
1200 } 1460 }
1201} 1461}
1202 1462
1203/* always use the TRANSFER macro */ 1463/* always use the TRANSFER macro */
1204static void NOINLINE 1464static void NOINLINE /* noinline so we have a fixed stackframe */
1205transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1206{ 1466{
1207 dSTACKLEVEL; 1467 dSTACKLEVEL;
1208 static volatile int has_throw;
1209 1468
1210 /* sometimes transfer is only called to set idle_sp */ 1469 /* sometimes transfer is only called to set idle_sp */
1211 if (expect_false (!next)) 1470 if (expect_false (!prev))
1212 { 1471 {
1213 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1472 cctx_current->idle_sp = STACKLEVEL;
1214 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1215 } 1474 }
1216 else if (expect_true (prev != next)) 1475 else if (expect_true (prev != next))
1217 { 1476 {
1218 coro_cctx *prev__cctx; 1477 coro_cctx *cctx_prev;
1219 1478
1220 if (expect_false (prev->flags & CF_NEW)) 1479 if (expect_false (prev->flags & CF_NEW))
1221 { 1480 {
1222 /* create a new empty context */ 1481 /* create a new empty/source context */
1223 Newz (0, prev->cctx, 1, coro_cctx);
1224 prev->flags &= ~CF_NEW; 1482 prev->flags &= ~CF_NEW;
1225 prev->flags |= CF_RUNNING; 1483 prev->flags |= CF_RUNNING;
1226 } 1484 }
1227 1485
1228 prev->flags &= ~CF_RUNNING; 1486 prev->flags &= ~CF_RUNNING;
1229 next->flags |= CF_RUNNING; 1487 next->flags |= CF_RUNNING;
1230
1231 LOCK;
1232 1488
1233 /* first get rid of the old state */ 1489 /* first get rid of the old state */
1234 save_perl (aTHX_ prev); 1490 save_perl (aTHX_ prev);
1235 1491
1236 if (expect_false (next->flags & CF_NEW)) 1492 if (expect_false (next->flags & CF_NEW))
… …
1241 coro_setup (aTHX_ next); 1497 coro_setup (aTHX_ next);
1242 } 1498 }
1243 else 1499 else
1244 load_perl (aTHX_ next); 1500 load_perl (aTHX_ next);
1245 1501
1246 prev__cctx = prev->cctx;
1247
1248 /* possibly "free" the cctx */ 1502 /* possibly untie and reuse the cctx */
1249 if (expect_true ( 1503 if (expect_true (
1250 prev__cctx->idle_sp == STACKLEVEL 1504 cctx_current->idle_sp == STACKLEVEL
1251 && !(prev__cctx->flags & CC_TRACE) 1505 && !(cctx_current->flags & CC_TRACE)
1252 && !force_cctx 1506 && !force_cctx
1253 )) 1507 ))
1254 { 1508 {
1255 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1256 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1257 1511
1258 prev->cctx = 0;
1259
1260 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1261 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1262 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1263 if (!next->cctx) 1515 if (expect_true (!next->cctx))
1264 next->cctx = cctx_get (aTHX); 1516 next->cctx = cctx_get (aTHX);
1265 1517
1266 cctx_put (prev__cctx); 1518 cctx_put (cctx_current);
1267 } 1519 }
1520 else
1521 prev->cctx = cctx_current;
1268 1522
1269 ++next->usecount; 1523 ++next->usecount;
1270 1524
1271 if (expect_true (!next->cctx)) 1525 cctx_prev = cctx_current;
1272 next->cctx = cctx_get (aTHX); 1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1273 1527
1274 has_throw = !!next->throw; 1528 next->cctx = 0;
1275 1529
1276 if (expect_false (prev__cctx != next->cctx)) 1530 if (expect_false (cctx_prev != cctx_current))
1277 { 1531 {
1278 prev__cctx->top_env = PL_top_env; 1532 cctx_prev->top_env = PL_top_env;
1279 PL_top_env = next->cctx->top_env; 1533 PL_top_env = cctx_current->top_env;
1280 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1281 } 1535 }
1282 1536
1283 free_coro_mortal (aTHX); 1537 transfer_tail (aTHX);
1284 UNLOCK;
1285
1286 if (expect_false (has_throw))
1287 {
1288 struct coro *coro = SvSTATE (coro_current);
1289
1290 if (coro->throw)
1291 {
1292 SV *exception = coro->throw;
1293 coro->throw = 0;
1294 sv_setsv (ERRSV, exception);
1295 croak (0);
1296 }
1297 }
1298 } 1538 }
1299} 1539}
1300
1301struct transfer_args
1302{
1303 struct coro *prev, *next;
1304};
1305 1540
1306#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1307#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308 1543
1309/** high level stuff ********************************************************/ 1544/** high level stuff ********************************************************/
… …
1311static int 1546static int
1312coro_state_destroy (pTHX_ struct coro *coro) 1547coro_state_destroy (pTHX_ struct coro *coro)
1313{ 1548{
1314 if (coro->flags & CF_DESTROYED) 1549 if (coro->flags & CF_DESTROYED)
1315 return 0; 1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1316 1554
1317 coro->flags |= CF_DESTROYED; 1555 coro->flags |= CF_DESTROYED;
1318 1556
1319 if (coro->flags & CF_READY) 1557 if (coro->flags & CF_READY)
1320 { 1558 {
1321 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1322 /* alternative: look through all ready queues and remove the coro */ 1560 /* alternative: look through all ready queues and remove the coro */
1323 LOCK;
1324 --coro_nready; 1561 --coro_nready;
1325 UNLOCK;
1326 } 1562 }
1327 else 1563 else
1328 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1329 1565
1330 if (coro->mainstack && coro->mainstack != main_mainstack) 1566 if (coro->mainstack
1331 { 1567 && coro->mainstack != main_mainstack
1332 struct coro temp; 1568 && coro->slot
1333 1569 && !PL_dirty)
1334 if (coro->flags & CF_RUNNING)
1335 croak ("FATAL: tried to destroy currently running coroutine");
1336
1337 save_perl (aTHX_ &temp);
1338 load_perl (aTHX_ coro);
1339
1340 coro_destroy (aTHX_ coro); 1570 coro_destruct_perl (aTHX_ coro);
1341
1342 load_perl (aTHX_ &temp);
1343
1344 coro->slot = 0;
1345 }
1346 1571
1347 cctx_destroy (coro->cctx); 1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1348 SvREFCNT_dec (coro->args); 1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1349 1576
1350 if (coro->next) coro->next->prev = coro->prev; 1577 if (coro->next) coro->next->prev = coro->prev;
1351 if (coro->prev) coro->prev->next = coro->next; 1578 if (coro->prev) coro->prev->next = coro->next;
1352 if (coro == coro_first) coro_first = coro->next; 1579 if (coro == coro_first) coro_first = coro->next;
1353 1580
… …
1391# define MGf_DUP 0 1618# define MGf_DUP 0
1392#endif 1619#endif
1393}; 1620};
1394 1621
1395static void 1622static void
1396prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1397{ 1624{
1398 ta->prev = SvSTATE (prev_sv); 1625 ta->prev = SvSTATE (prev_sv);
1399 ta->next = SvSTATE (next_sv); 1626 ta->next = SvSTATE (next_sv);
1400 TRANSFER_CHECK (*ta); 1627 TRANSFER_CHECK (*ta);
1401} 1628}
1402 1629
1403static void 1630static void
1404api_transfer (SV *prev_sv, SV *next_sv) 1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1405{ 1632{
1406 dTHX;
1407 struct transfer_args ta; 1633 struct coro_transfer_args ta;
1408 1634
1409 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1410 TRANSFER (ta, 1); 1636 TRANSFER (ta, 1);
1411} 1637}
1412 1638
1413/** Coro ********************************************************************/ 1639/** Coro ********************************************************************/
1414 1640
1415static void 1641INLINE void
1416coro_enq (pTHX_ SV *coro_sv) 1642coro_enq (pTHX_ struct coro *coro)
1417{ 1643{
1418 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1419}
1420 1645
1421static SV * 1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1422coro_deq (pTHX) 1654coro_deq (pTHX)
1423{ 1655{
1424 int prio; 1656 int prio;
1425 1657
1426 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1427 if (AvFILLp (coro_ready [prio]) >= 0) 1659 {
1428 return av_shift (coro_ready [prio]); 1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1429 1669
1430 return 0; 1670 return 0;
1431} 1671}
1432 1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
1676 dTHX;
1677 dSP;
1678
1679 ENTER;
1680 SAVETMPS;
1681
1682 PUSHMARK (SP);
1683 PUTBACK;
1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1685
1686 FREETMPS;
1687 LEAVE;
1688}
1689
1433static int 1690static int
1434api_ready (SV *coro_sv) 1691api_ready (pTHX_ SV *coro_sv)
1435{ 1692{
1436 dTHX;
1437 struct coro *coro;
1438 SV *sv_hook;
1439 void (*xs_hook)(void);
1440
1441 if (SvROK (coro_sv))
1442 coro_sv = SvRV (coro_sv);
1443
1444 coro = SvSTATE (coro_sv); 1693 struct coro *coro = SvSTATE (coro_sv);
1445 1694
1446 if (coro->flags & CF_READY) 1695 if (coro->flags & CF_READY)
1447 return 0; 1696 return 0;
1448 1697
1449 coro->flags |= CF_READY; 1698 coro->flags |= CF_READY;
1450 1699
1451 LOCK; 1700 coro_enq (aTHX_ coro);
1452 1701
1453 sv_hook = coro_nready ? 0 : coro_readyhook; 1702 if (!coro_nready++)
1454 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1703 if (coroapi.readyhook)
1455 1704 coroapi.readyhook ();
1456 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1457 ++coro_nready;
1458
1459 UNLOCK;
1460
1461 if (sv_hook)
1462 {
1463 dSP;
1464
1465 ENTER;
1466 SAVETMPS;
1467
1468 PUSHMARK (SP);
1469 PUTBACK;
1470 call_sv (sv_hook, G_DISCARD);
1471 SPAGAIN;
1472
1473 FREETMPS;
1474 LEAVE;
1475 }
1476
1477 if (xs_hook)
1478 xs_hook ();
1479 1705
1480 return 1; 1706 return 1;
1481} 1707}
1482 1708
1483static int 1709static int
1484api_is_ready (SV *coro_sv) 1710api_is_ready (pTHX_ SV *coro_sv)
1485{ 1711{
1486 dTHX;
1487 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488} 1713}
1489 1714
1490static void 1715/* expects to own a reference to next->hv */
1716INLINE void
1491prepare_schedule (pTHX_ struct transfer_args *ta) 1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1492{ 1718{
1493 SV *prev_sv, *next_sv;
1494
1495 for (;;)
1496 {
1497 LOCK;
1498 next_sv = coro_deq (aTHX);
1499
1500 /* nothing to schedule: call the idle handler */
1501 if (expect_false (!next_sv))
1502 {
1503 dSP;
1504 UNLOCK;
1505
1506 ENTER;
1507 SAVETMPS;
1508
1509 PUSHMARK (SP);
1510 PUTBACK;
1511 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1512 SPAGAIN;
1513
1514 FREETMPS;
1515 LEAVE;
1516 continue;
1517 }
1518
1519 ta->next = SvSTATE (next_sv);
1520
1521 /* cannot transfer to destroyed coros, skip and look for next */
1522 if (expect_false (ta->next->flags & CF_DESTROYED))
1523 {
1524 UNLOCK;
1525 SvREFCNT_dec (next_sv);
1526 /* coro_nready is already taken care of by destroy */
1527 continue;
1528 }
1529
1530 --coro_nready;
1531 UNLOCK;
1532 break;
1533 }
1534
1535 /* free this only after the transfer */
1536 prev_sv = SvRV (coro_current); 1719 SV *prev_sv = SvRV (coro_current);
1720
1537 ta->prev = SvSTATE (prev_sv); 1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1538 TRANSFER_CHECK (*ta); 1724 TRANSFER_CHECK (*ta);
1539 assert (ta->next->flags & CF_READY); 1725
1540 ta->next->flags &= ~CF_READY;
1541 SvRV_set (coro_current, next_sv); 1726 SvRV_set (coro_current, (SV *)next->hv);
1542 1727
1543 LOCK;
1544 free_coro_mortal (aTHX); 1728 free_coro_mortal (aTHX);
1545 coro_mortal = prev_sv; 1729 coro_mortal = prev_sv;
1546 UNLOCK;
1547} 1730}
1548 1731
1549static void 1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
1736 {
1737 struct coro *next = coro_deq (aTHX);
1738
1739 if (expect_true (next))
1740 {
1741 /* cannot transfer to destroyed coros, skip and look for next */
1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1744 else
1745 {
1746 next->flags &= ~CF_READY;
1747 --coro_nready;
1748
1749 prepare_schedule_to (aTHX_ ta, next);
1750 break;
1751 }
1752 }
1753 else
1754 {
1755 /* nothing to schedule: call the idle handler */
1756 if (SvROK (sv_idle)
1757 && SvOBJECT (SvRV (sv_idle)))
1758 {
1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1760 api_ready (aTHX_ SvRV (sv_idle));
1761 --coro_nready;
1762 }
1763 else
1764 {
1765 dSP;
1766
1767 ENTER;
1768 SAVETMPS;
1769
1770 PUSHMARK (SP);
1771 PUTBACK;
1772 call_sv (sv_idle, G_VOID | G_DISCARD);
1773
1774 FREETMPS;
1775 LEAVE;
1776 }
1777 }
1778 }
1779}
1780
1781INLINE void
1550prepare_cede (pTHX_ struct transfer_args *ta) 1782prepare_cede (pTHX_ struct coro_transfer_args *ta)
1551{ 1783{
1552 api_ready (coro_current); 1784 api_ready (aTHX_ coro_current);
1553 prepare_schedule (aTHX_ ta); 1785 prepare_schedule (aTHX_ ta);
1554} 1786}
1555 1787
1788INLINE void
1789prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1790{
1791 SV *prev = SvRV (coro_current);
1792
1793 if (coro_nready)
1794 {
1795 prepare_schedule (aTHX_ ta);
1796 api_ready (aTHX_ prev);
1797 }
1798 else
1799 prepare_nop (aTHX_ ta);
1800}
1801
1802static void
1803api_schedule (pTHX)
1804{
1805 struct coro_transfer_args ta;
1806
1807 prepare_schedule (aTHX_ &ta);
1808 TRANSFER (ta, 1);
1809}
1810
1811static void
1812api_schedule_to (pTHX_ SV *coro_sv)
1813{
1814 struct coro_transfer_args ta;
1815 struct coro *next = SvSTATE (coro_sv);
1816
1817 SvREFCNT_inc_NN (coro_sv);
1818 prepare_schedule_to (aTHX_ &ta, next);
1819}
1820
1556static int 1821static int
1557prepare_cede_notself (pTHX_ struct transfer_args *ta) 1822api_cede (pTHX)
1558{ 1823{
1559 if (coro_nready) 1824 struct coro_transfer_args ta;
1560 { 1825
1561 SV *prev = SvRV (coro_current);
1562 prepare_schedule (aTHX_ ta); 1826 prepare_cede (aTHX_ &ta);
1563 api_ready (prev); 1827
1828 if (expect_true (ta.prev != ta.next))
1829 {
1830 TRANSFER (ta, 1);
1564 return 1; 1831 return 1;
1565 } 1832 }
1566 else 1833 else
1567 return 0; 1834 return 0;
1568} 1835}
1569 1836
1570static void
1571api_schedule (void)
1572{
1573 dTHX;
1574 struct transfer_args ta;
1575
1576 prepare_schedule (aTHX_ &ta);
1577 TRANSFER (ta, 1);
1578}
1579
1580static int 1837static int
1581api_cede (void) 1838api_cede_notself (pTHX)
1582{ 1839{
1583 dTHX; 1840 if (coro_nready)
1841 {
1584 struct transfer_args ta; 1842 struct coro_transfer_args ta;
1585 1843
1586 prepare_cede (aTHX_ &ta); 1844 prepare_cede_notself (aTHX_ &ta);
1587
1588 if (expect_true (ta.prev != ta.next))
1589 {
1590 TRANSFER (ta, 1); 1845 TRANSFER (ta, 1);
1591 return 1; 1846 return 1;
1592 } 1847 }
1593 else 1848 else
1594 return 0; 1849 return 0;
1595} 1850}
1596 1851
1597static int 1852static void
1598api_cede_notself (void)
1599{
1600 dTHX;
1601 struct transfer_args ta;
1602
1603 if (prepare_cede_notself (aTHX_ &ta))
1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1610}
1611
1612static void
1613api_trace (SV *coro_sv, int flags) 1853api_trace (pTHX_ SV *coro_sv, int flags)
1614{ 1854{
1615 dTHX;
1616 struct coro *coro = SvSTATE (coro_sv); 1855 struct coro *coro = SvSTATE (coro_sv);
1617 1856
1857 if (coro->flags & CF_RUNNING)
1858 croak ("cannot enable tracing on a running coroutine, caught");
1859
1618 if (flags & CC_TRACE) 1860 if (flags & CC_TRACE)
1619 { 1861 {
1620 if (!coro->cctx) 1862 if (!coro->cctx)
1621 coro->cctx = cctx_new (); 1863 coro->cctx = cctx_new_run ();
1622 else if (!(coro->cctx->flags & CC_TRACE)) 1864 else if (!(coro->cctx->flags & CC_TRACE))
1623 croak ("cannot enable tracing on coroutine with custom stack"); 1865 croak ("cannot enable tracing on coroutine with custom stack, caught");
1624 1866
1625 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1867 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1626 } 1868 }
1627 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1869 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628 { 1870 {
… …
1633 else 1875 else
1634 coro->slot->runops = RUNOPS_DEFAULT; 1876 coro->slot->runops = RUNOPS_DEFAULT;
1635 } 1877 }
1636} 1878}
1637 1879
1880static void
1881coro_call_on_destroy (pTHX_ struct coro *coro)
1882{
1883 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1884 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1885
1886 if (on_destroyp)
1887 {
1888 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1889
1890 while (AvFILLp (on_destroy) >= 0)
1891 {
1892 dSP; /* don't disturb outer sp */
1893 SV *cb = av_pop (on_destroy);
1894
1895 PUSHMARK (SP);
1896
1897 if (statusp)
1898 {
1899 int i;
1900 AV *status = (AV *)SvRV (*statusp);
1901 EXTEND (SP, AvFILLp (status) + 1);
1902
1903 for (i = 0; i <= AvFILLp (status); ++i)
1904 PUSHs (AvARRAY (status)[i]);
1905 }
1906
1907 PUTBACK;
1908 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1909 }
1910 }
1911}
1912
1913static void
1914slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 int i;
1917 HV *hv = (HV *)SvRV (coro_current);
1918 AV *av = newAV ();
1919
1920 /* items are actually not so common, so optimise for this case */
1921 if (items)
1922 {
1923 av_extend (av, items - 1);
1924
1925 for (i = 0; i < items; ++i)
1926 av_push (av, SvREFCNT_inc_NN (arg [i]));
1927 }
1928
1929 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1930
1931 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1932 api_ready (aTHX_ sv_manager);
1933
1934 frame->prepare = prepare_schedule;
1935 frame->check = slf_check_repeat;
1936
1937 /* as a minor optimisation, we could unwind all stacks here */
1938 /* but that puts extra pressure on pp_slf, and is not worth much */
1939 /*coro_unwind_stacks (aTHX);*/
1940}
1941
1942/*****************************************************************************/
1943/* async pool handler */
1944
1638static int 1945static int
1639coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1946slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1640{ 1947{
1641 AV *padlist; 1948 HV *hv = (HV *)SvRV (coro_current);
1642 AV *av = (AV *)mg->mg_obj; 1949 struct coro *coro = (struct coro *)frame->data;
1643 1950
1644 abort (); 1951 if (!coro->invoke_cb)
1952 return 1; /* loop till we have invoke */
1953 else
1954 {
1955 hv_store (hv, "desc", sizeof ("desc") - 1,
1956 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1957
1958 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1959
1960 {
1961 dSP;
1962 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1963 PUTBACK;
1964 }
1965
1966 SvREFCNT_dec (GvAV (PL_defgv));
1967 GvAV (PL_defgv) = coro->invoke_av;
1968 coro->invoke_av = 0;
1969
1970 return 0;
1971 }
1972}
1973
1974static void
1975slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1976{
1977 HV *hv = (HV *)SvRV (coro_current);
1978 struct coro *coro = SvSTATE_hv ((SV *)hv);
1979
1980 if (expect_true (coro->saved_deffh))
1981 {
1982 /* subsequent iteration */
1983 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1984 coro->saved_deffh = 0;
1985
1986 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1987 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1988 {
1989 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1990 coro->invoke_av = newAV ();
1991
1992 frame->prepare = prepare_nop;
1993 }
1994 else
1995 {
1996 av_clear (GvAV (PL_defgv));
1997 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (aTHX_ coro_current, 0);
2003
2004 frame->prepare = prepare_schedule;
2005 av_push (av_async_pool, SvREFCNT_inc (hv));
2006 }
2007 }
2008 else
2009 {
2010 /* first iteration, simply fall through */
2011 frame->prepare = prepare_nop;
2012 }
2013
2014 frame->check = slf_check_pool_handler;
2015 frame->data = (void *)coro;
2016}
2017
2018/*****************************************************************************/
2019/* rouse callback */
2020
2021#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2022
2023static void
2024coro_rouse_callback (pTHX_ CV *cv)
2025{
2026 dXSARGS;
2027 SV *data = (SV *)S_GENSUB_ARG;
2028
2029 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2030 {
2031 /* first call, set args */
2032 SV *coro = SvRV (data);
2033 AV *av = newAV ();
2034
2035 SvRV_set (data, (SV *)av);
2036
2037 /* better take a full copy of the arguments */
2038 while (items--)
2039 av_store (av, items, newSVsv (ST (items)));
2040
2041 api_ready (aTHX_ coro);
2042 SvREFCNT_dec (coro);
2043 }
2044
2045 XSRETURN_EMPTY;
2046}
2047
2048static int
2049slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2050{
2051 SV *data = (SV *)frame->data;
2052
2053 if (CORO_THROW)
2054 return 0;
2055
2056 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2057 return 1;
2058
2059 /* now push all results on the stack */
2060 {
2061 dSP;
2062 AV *av = (AV *)SvRV (data);
2063 int i;
2064
2065 EXTEND (SP, AvFILLp (av) + 1);
2066 for (i = 0; i <= AvFILLp (av); ++i)
2067 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2068
2069 /* we have stolen the elements, so set length to zero and free */
2070 AvFILLp (av) = -1;
2071 av_undef (av);
2072
2073 PUTBACK;
2074 }
1645 2075
1646 return 0; 2076 return 0;
1647} 2077}
1648 2078
1649static MGVTBL coro_gensub_vtbl = { 2079static void
1650 0, 0, 0, 0, 2080slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1651 coro_gensub_free 2081{
1652}; 2082 SV *cb;
2083
2084 if (items)
2085 cb = arg [0];
2086 else
2087 {
2088 struct coro *coro = SvSTATE_current;
2089
2090 if (!coro->rouse_cb)
2091 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2092
2093 cb = sv_2mortal (coro->rouse_cb);
2094 coro->rouse_cb = 0;
2095 }
2096
2097 if (!SvROK (cb)
2098 || SvTYPE (SvRV (cb)) != SVt_PVCV
2099 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2100 croak ("Coro::rouse_wait called with illegal callback argument,");
2101
2102 {
2103 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 frame->data = (void *)data;
2107 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2108 frame->check = slf_check_rouse_wait;
2109 }
2110}
2111
2112static SV *
2113coro_new_rouse_cb (pTHX)
2114{
2115 HV *hv = (HV *)SvRV (coro_current);
2116 struct coro *coro = SvSTATE_hv (hv);
2117 SV *data = newRV_inc ((SV *)hv);
2118 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2119
2120 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2121 SvREFCNT_dec (data); /* magicext increases the refcount */
2122
2123 SvREFCNT_dec (coro->rouse_cb);
2124 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2125
2126 return cb;
2127}
2128
2129/*****************************************************************************/
2130/* schedule-like-function opcode (SLF) */
2131
2132static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2133static const CV *slf_cv;
2134static SV **slf_argv;
2135static int slf_argc, slf_arga; /* count, allocated */
2136static I32 slf_ax; /* top of stack, for restore */
2137
2138/* this restores the stack in the case we patched the entersub, to */
2139/* recreate the stack frame as perl will on following calls */
2140/* since entersub cleared the stack */
2141static OP *
2142pp_restore (pTHX)
2143{
2144 int i;
2145 SV **SP = PL_stack_base + slf_ax;
2146
2147 PUSHMARK (SP);
2148
2149 EXTEND (SP, slf_argc + 1);
2150
2151 for (i = 0; i < slf_argc; ++i)
2152 PUSHs (sv_2mortal (slf_argv [i]));
2153
2154 PUSHs ((SV *)CvGV (slf_cv));
2155
2156 RETURNOP (slf_restore.op_first);
2157}
2158
2159static void
2160slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2161{
2162 SV **arg = (SV **)slf_frame.data;
2163
2164 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2165}
2166
2167static void
2168slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2169{
2170 if (items != 2)
2171 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2172
2173 frame->prepare = slf_prepare_transfer;
2174 frame->check = slf_check_nop;
2175 frame->data = (void *)arg; /* let's hope it will stay valid */
2176}
2177
2178static void
2179slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 frame->prepare = prepare_schedule;
2182 frame->check = slf_check_nop;
2183}
2184
2185static void
2186slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2187{
2188 struct coro *next = (struct coro *)slf_frame.data;
2189
2190 SvREFCNT_inc_NN (next->hv);
2191 prepare_schedule_to (aTHX_ ta, next);
2192}
2193
2194static void
2195slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 if (!items)
2198 croak ("Coro::schedule_to expects a coroutine argument, caught");
2199
2200 frame->data = (void *)SvSTATE (arg [0]);
2201 frame->prepare = slf_prepare_schedule_to;
2202 frame->check = slf_check_nop;
2203}
2204
2205static void
2206slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
2208 api_ready (aTHX_ SvRV (coro_current));
2209
2210 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2211}
2212
2213static void
2214slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2215{
2216 frame->prepare = prepare_cede;
2217 frame->check = slf_check_nop;
2218}
2219
2220static void
2221slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2222{
2223 frame->prepare = prepare_cede_notself;
2224 frame->check = slf_check_nop;
2225}
2226
2227/*
2228 * these not obviously related functions are all rolled into one
2229 * function to increase chances that they all will call transfer with the same
2230 * stack offset
2231 * SLF stands for "schedule-like-function".
2232 */
2233static OP *
2234pp_slf (pTHX)
2235{
2236 I32 checkmark; /* mark SP to see how many elements check has pushed */
2237
2238 /* set up the slf frame, unless it has already been set-up */
2239 /* the latter happens when a new coro has been started */
2240 /* or when a new cctx was attached to an existing coroutine */
2241 if (expect_true (!slf_frame.prepare))
2242 {
2243 /* first iteration */
2244 dSP;
2245 SV **arg = PL_stack_base + TOPMARK + 1;
2246 int items = SP - arg; /* args without function object */
2247 SV *gv = *sp;
2248
2249 /* do a quick consistency check on the "function" object, and if it isn't */
2250 /* for us, divert to the real entersub */
2251 if (SvTYPE (gv) != SVt_PVGV
2252 || !GvCV (gv)
2253 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2254 return PL_ppaddr[OP_ENTERSUB](aTHX);
2255
2256 if (!(PL_op->op_flags & OPf_STACKED))
2257 {
2258 /* ampersand-form of call, use @_ instead of stack */
2259 AV *av = GvAV (PL_defgv);
2260 arg = AvARRAY (av);
2261 items = AvFILLp (av) + 1;
2262 }
2263
2264 /* now call the init function, which needs to set up slf_frame */
2265 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2266 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2267
2268 /* pop args */
2269 SP = PL_stack_base + POPMARK;
2270
2271 PUTBACK;
2272 }
2273
2274 /* now that we have a slf_frame, interpret it! */
2275 /* we use a callback system not to make the code needlessly */
2276 /* complicated, but so we can run multiple perl coros from one cctx */
2277
2278 do
2279 {
2280 struct coro_transfer_args ta;
2281
2282 slf_frame.prepare (aTHX_ &ta);
2283 TRANSFER (ta, 0);
2284
2285 checkmark = PL_stack_sp - PL_stack_base;
2286 }
2287 while (slf_frame.check (aTHX_ &slf_frame));
2288
2289 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2290
2291 /* exception handling */
2292 if (expect_false (CORO_THROW))
2293 {
2294 SV *exception = sv_2mortal (CORO_THROW);
2295
2296 CORO_THROW = 0;
2297 sv_setsv (ERRSV, exception);
2298 croak (0);
2299 }
2300
2301 /* return value handling - mostly like entersub */
2302 /* make sure we put something on the stack in scalar context */
2303 if (GIMME_V == G_SCALAR)
2304 {
2305 dSP;
2306 SV **bot = PL_stack_base + checkmark;
2307
2308 if (sp == bot) /* too few, push undef */
2309 bot [1] = &PL_sv_undef;
2310 else if (sp != bot + 1) /* too many, take last one */
2311 bot [1] = *sp;
2312
2313 SP = bot + 1;
2314
2315 PUTBACK;
2316 }
2317
2318 return NORMAL;
2319}
2320
2321static void
2322api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2323{
2324 int i;
2325 SV **arg = PL_stack_base + ax;
2326 int items = PL_stack_sp - arg + 1;
2327
2328 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2329
2330 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2331 && PL_op->op_ppaddr != pp_slf)
2332 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2333
2334 CvFLAGS (cv) |= CVf_SLF;
2335 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2336 slf_cv = cv;
2337
2338 /* we patch the op, and then re-run the whole call */
2339 /* we have to put the same argument on the stack for this to work */
2340 /* and this will be done by pp_restore */
2341 slf_restore.op_next = (OP *)&slf_restore;
2342 slf_restore.op_type = OP_CUSTOM;
2343 slf_restore.op_ppaddr = pp_restore;
2344 slf_restore.op_first = PL_op;
2345
2346 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2347
2348 if (PL_op->op_flags & OPf_STACKED)
2349 {
2350 if (items > slf_arga)
2351 {
2352 slf_arga = items;
2353 free (slf_argv);
2354 slf_argv = malloc (slf_arga * sizeof (SV *));
2355 }
2356
2357 slf_argc = items;
2358
2359 for (i = 0; i < items; ++i)
2360 slf_argv [i] = SvREFCNT_inc (arg [i]);
2361 }
2362 else
2363 slf_argc = 0;
2364
2365 PL_op->op_ppaddr = pp_slf;
2366 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2367
2368 PL_op = (OP *)&slf_restore;
2369}
2370
2371/*****************************************************************************/
2372/* dynamic wind */
2373
2374static void
2375on_enterleave_call (pTHX_ SV *cb)
2376{
2377 dSP;
2378
2379 PUSHSTACK;
2380
2381 PUSHMARK (SP);
2382 PUTBACK;
2383 call_sv (cb, G_VOID | G_DISCARD);
2384 SPAGAIN;
2385
2386 POPSTACK;
2387}
2388
2389static SV *
2390coro_avp_pop_and_free (pTHX_ AV **avp)
2391{
2392 AV *av = *avp;
2393 SV *res = av_pop (av);
2394
2395 if (AvFILLp (av) < 0)
2396 {
2397 *avp = 0;
2398 SvREFCNT_dec (av);
2399 }
2400
2401 return res;
2402}
2403
2404static void
2405coro_pop_on_enter (pTHX_ void *coro)
2406{
2407 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2408 SvREFCNT_dec (cb);
2409}
2410
2411static void
2412coro_pop_on_leave (pTHX_ void *coro)
2413{
2414 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2415 on_enterleave_call (aTHX_ sv_2mortal (cb));
2416}
1653 2417
1654/*****************************************************************************/ 2418/*****************************************************************************/
1655/* PerlIO::cede */ 2419/* PerlIO::cede */
1656 2420
1657typedef struct 2421typedef struct
… …
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2449 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686 double now = nvtime (); 2450 double now = nvtime ();
1687 2451
1688 if (now >= self->next) 2452 if (now >= self->next)
1689 { 2453 {
1690 api_cede (); 2454 api_cede (aTHX);
1691 self->next = now + self->every; 2455 self->next = now + self->every;
1692 } 2456 }
1693 2457
1694 return PerlIOBuf_flush (aTHX_ f); 2458 return PerlIOBuf_flush (aTHX_ f);
1695} 2459}
… …
1724 PerlIOBuf_get_ptr, 2488 PerlIOBuf_get_ptr,
1725 PerlIOBuf_get_cnt, 2489 PerlIOBuf_get_cnt,
1726 PerlIOBuf_set_ptrcnt, 2490 PerlIOBuf_set_ptrcnt,
1727}; 2491};
1728 2492
2493/*****************************************************************************/
2494/* Coro::Semaphore & Coro::Signal */
2495
2496static SV *
2497coro_waitarray_new (pTHX_ int count)
2498{
2499 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2500 AV *av = newAV ();
2501 SV **ary;
2502
2503 /* unfortunately, building manually saves memory */
2504 Newx (ary, 2, SV *);
2505 AvALLOC (av) = ary;
2506#if PERL_VERSION_ATLEAST (5,10,0)
2507 AvARRAY (av) = ary;
2508#else
2509 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2510 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2511 SvPVX ((SV *)av) = (char *)ary;
2512#endif
2513 AvMAX (av) = 1;
2514 AvFILLp (av) = 0;
2515 ary [0] = newSViv (count);
2516
2517 return newRV_noinc ((SV *)av);
2518}
2519
2520/* semaphore */
2521
2522static void
2523coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2524{
2525 SV *count_sv = AvARRAY (av)[0];
2526 IV count = SvIVX (count_sv);
2527
2528 count += adjust;
2529 SvIVX (count_sv) = count;
2530
2531 /* now wake up as many waiters as are expected to lock */
2532 while (count > 0 && AvFILLp (av) > 0)
2533 {
2534 SV *cb;
2535
2536 /* swap first two elements so we can shift a waiter */
2537 AvARRAY (av)[0] = AvARRAY (av)[1];
2538 AvARRAY (av)[1] = count_sv;
2539 cb = av_shift (av);
2540
2541 if (SvOBJECT (cb))
2542 {
2543 api_ready (aTHX_ cb);
2544 --count;
2545 }
2546 else if (SvTYPE (cb) == SVt_PVCV)
2547 {
2548 dSP;
2549 PUSHMARK (SP);
2550 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2551 PUTBACK;
2552 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2553 }
2554
2555 SvREFCNT_dec (cb);
2556 }
2557}
2558
2559static void
2560coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2561{
2562 /* call $sem->adjust (0) to possibly wake up some other waiters */
2563 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2564}
2565
2566static int
2567slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2568{
2569 AV *av = (AV *)frame->data;
2570 SV *count_sv = AvARRAY (av)[0];
2571
2572 /* if we are about to throw, don't actually acquire the lock, just throw */
2573 if (CORO_THROW)
2574 return 0;
2575 else if (SvIVX (count_sv) > 0)
2576 {
2577 SvSTATE_current->on_destroy = 0;
2578
2579 if (acquire)
2580 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2581 else
2582 coro_semaphore_adjust (aTHX_ av, 0);
2583
2584 return 0;
2585 }
2586 else
2587 {
2588 int i;
2589 /* if we were woken up but can't down, we look through the whole */
2590 /* waiters list and only add us if we aren't in there already */
2591 /* this avoids some degenerate memory usage cases */
2592
2593 for (i = 1; i <= AvFILLp (av); ++i)
2594 if (AvARRAY (av)[i] == SvRV (coro_current))
2595 return 1;
2596
2597 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2598 return 1;
2599 }
2600}
2601
2602static int
2603slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2604{
2605 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2606}
2607
2608static int
2609slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2610{
2611 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2612}
2613
2614static void
2615slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2616{
2617 AV *av = (AV *)SvRV (arg [0]);
2618
2619 if (SvIVX (AvARRAY (av)[0]) > 0)
2620 {
2621 frame->data = (void *)av;
2622 frame->prepare = prepare_nop;
2623 }
2624 else
2625 {
2626 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2627
2628 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2629 frame->prepare = prepare_schedule;
2630
2631 /* to avoid race conditions when a woken-up coro gets terminated */
2632 /* we arrange for a temporary on_destroy that calls adjust (0) */
2633 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2634 }
2635}
2636
2637static void
2638slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2639{
2640 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2641 frame->check = slf_check_semaphore_down;
2642}
2643
2644static void
2645slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 if (items >= 2)
2648 {
2649 /* callback form */
2650 AV *av = (AV *)SvRV (arg [0]);
2651 SV *cb_cv = s_get_cv_croak (arg [1]);
2652
2653 av_push (av, SvREFCNT_inc_NN (cb_cv));
2654
2655 if (SvIVX (AvARRAY (av)[0]) > 0)
2656 coro_semaphore_adjust (aTHX_ av, 0);
2657
2658 frame->prepare = prepare_nop;
2659 frame->check = slf_check_nop;
2660 }
2661 else
2662 {
2663 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2664 frame->check = slf_check_semaphore_wait;
2665 }
2666}
2667
2668/* signal */
2669
2670static void
2671coro_signal_wake (pTHX_ AV *av, int count)
2672{
2673 SvIVX (AvARRAY (av)[0]) = 0;
2674
2675 /* now signal count waiters */
2676 while (count > 0 && AvFILLp (av) > 0)
2677 {
2678 SV *cb;
2679
2680 /* swap first two elements so we can shift a waiter */
2681 cb = AvARRAY (av)[0];
2682 AvARRAY (av)[0] = AvARRAY (av)[1];
2683 AvARRAY (av)[1] = cb;
2684
2685 cb = av_shift (av);
2686
2687 if (SvTYPE (cb) == SVt_PVCV)
2688 {
2689 dSP;
2690 PUSHMARK (SP);
2691 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2692 PUTBACK;
2693 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2694 }
2695 else
2696 {
2697 api_ready (aTHX_ cb);
2698 sv_setiv (cb, 0); /* signal waiter */
2699 }
2700
2701 SvREFCNT_dec (cb);
2702
2703 --count;
2704 }
2705}
2706
2707static int
2708slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2709{
2710 /* if we are about to throw, also stop waiting */
2711 return SvROK ((SV *)frame->data) && !CORO_THROW;
2712}
2713
2714static void
2715slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 AV *av = (AV *)SvRV (arg [0]);
2718
2719 if (items >= 2)
2720 {
2721 SV *cb_cv = s_get_cv_croak (arg [1]);
2722 av_push (av, SvREFCNT_inc_NN (cb_cv));
2723
2724 if (SvIVX (AvARRAY (av)[0]))
2725 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2726
2727 frame->prepare = prepare_nop;
2728 frame->check = slf_check_nop;
2729 }
2730 else if (SvIVX (AvARRAY (av)[0]))
2731 {
2732 SvIVX (AvARRAY (av)[0]) = 0;
2733 frame->prepare = prepare_nop;
2734 frame->check = slf_check_nop;
2735 }
2736 else
2737 {
2738 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2739
2740 av_push (av, waiter);
2741
2742 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2743 frame->prepare = prepare_schedule;
2744 frame->check = slf_check_signal_wait;
2745 }
2746}
2747
2748/*****************************************************************************/
2749/* Coro::AIO */
2750
2751#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2752
2753/* helper storage struct */
2754struct io_state
2755{
2756 int errorno;
2757 I32 laststype; /* U16 in 5.10.0 */
2758 int laststatval;
2759 Stat_t statcache;
2760};
2761
2762static void
2763coro_aio_callback (pTHX_ CV *cv)
2764{
2765 dXSARGS;
2766 AV *state = (AV *)S_GENSUB_ARG;
2767 SV *coro = av_pop (state);
2768 SV *data_sv = newSV (sizeof (struct io_state));
2769
2770 av_extend (state, items - 1);
2771
2772 sv_upgrade (data_sv, SVt_PV);
2773 SvCUR_set (data_sv, sizeof (struct io_state));
2774 SvPOK_only (data_sv);
2775
2776 {
2777 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2778
2779 data->errorno = errno;
2780 data->laststype = PL_laststype;
2781 data->laststatval = PL_laststatval;
2782 data->statcache = PL_statcache;
2783 }
2784
2785 /* now build the result vector out of all the parameters and the data_sv */
2786 {
2787 int i;
2788
2789 for (i = 0; i < items; ++i)
2790 av_push (state, SvREFCNT_inc_NN (ST (i)));
2791 }
2792
2793 av_push (state, data_sv);
2794
2795 api_ready (aTHX_ coro);
2796 SvREFCNT_dec (coro);
2797 SvREFCNT_dec ((AV *)state);
2798}
2799
2800static int
2801slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2802{
2803 AV *state = (AV *)frame->data;
2804
2805 /* if we are about to throw, return early */
2806 /* this does not cancel the aio request, but at least */
2807 /* it quickly returns */
2808 if (CORO_THROW)
2809 return 0;
2810
2811 /* one element that is an RV? repeat! */
2812 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2813 return 1;
2814
2815 /* restore status */
2816 {
2817 SV *data_sv = av_pop (state);
2818 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2819
2820 errno = data->errorno;
2821 PL_laststype = data->laststype;
2822 PL_laststatval = data->laststatval;
2823 PL_statcache = data->statcache;
2824
2825 SvREFCNT_dec (data_sv);
2826 }
2827
2828 /* push result values */
2829 {
2830 dSP;
2831 int i;
2832
2833 EXTEND (SP, AvFILLp (state) + 1);
2834 for (i = 0; i <= AvFILLp (state); ++i)
2835 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2836
2837 PUTBACK;
2838 }
2839
2840 return 0;
2841}
2842
2843static void
2844slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2845{
2846 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2847 SV *coro_hv = SvRV (coro_current);
2848 struct coro *coro = SvSTATE_hv (coro_hv);
2849
2850 /* put our coroutine id on the state arg */
2851 av_push (state, SvREFCNT_inc_NN (coro_hv));
2852
2853 /* first see whether we have a non-zero priority and set it as AIO prio */
2854 if (coro->prio)
2855 {
2856 dSP;
2857
2858 static SV *prio_cv;
2859 static SV *prio_sv;
2860
2861 if (expect_false (!prio_cv))
2862 {
2863 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2864 prio_sv = newSViv (0);
2865 }
2866
2867 PUSHMARK (SP);
2868 sv_setiv (prio_sv, coro->prio);
2869 XPUSHs (prio_sv);
2870
2871 PUTBACK;
2872 call_sv (prio_cv, G_VOID | G_DISCARD);
2873 }
2874
2875 /* now call the original request */
2876 {
2877 dSP;
2878 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2879 int i;
2880
2881 PUSHMARK (SP);
2882
2883 /* first push all args to the stack */
2884 EXTEND (SP, items + 1);
2885
2886 for (i = 0; i < items; ++i)
2887 PUSHs (arg [i]);
2888
2889 /* now push the callback closure */
2890 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2891
2892 /* now call the AIO function - we assume our request is uncancelable */
2893 PUTBACK;
2894 call_sv ((SV *)req, G_VOID | G_DISCARD);
2895 }
2896
2897 /* now that the requets is going, we loop toll we have a result */
2898 frame->data = (void *)state;
2899 frame->prepare = prepare_schedule;
2900 frame->check = slf_check_aio_req;
2901}
2902
2903static void
2904coro_aio_req_xs (pTHX_ CV *cv)
2905{
2906 dXSARGS;
2907
2908 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2909
2910 XSRETURN_EMPTY;
2911}
2912
2913/*****************************************************************************/
2914
2915#if CORO_CLONE
2916# include "clone.c"
2917#endif
2918
2919/*****************************************************************************/
2920
2921static SV *
2922coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2923{
2924 SV *coro_sv;
2925 struct coro *coro;
2926 MAGIC *mg;
2927 HV *hv;
2928 SV *cb;
2929 int i;
2930
2931 if (argc > 0)
2932 {
2933 cb = s_get_cv_croak (argv [0]);
2934
2935 if (!is_coro)
2936 {
2937 if (CvISXSUB (cb))
2938 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2939
2940 if (!CvROOT (cb))
2941 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2942 }
2943 }
2944
2945 Newz (0, coro, 1, struct coro);
2946 coro->args = newAV ();
2947 coro->flags = CF_NEW;
2948
2949 if (coro_first) coro_first->prev = coro;
2950 coro->next = coro_first;
2951 coro_first = coro;
2952
2953 coro->hv = hv = newHV ();
2954 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2955 mg->mg_flags |= MGf_DUP;
2956 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2957
2958 if (argc > 0)
2959 {
2960 av_extend (coro->args, argc + is_coro - 1);
2961
2962 if (is_coro)
2963 {
2964 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2965 cb = (SV *)cv_coro_run;
2966 }
2967
2968 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2969
2970 for (i = 1; i < argc; i++)
2971 av_push (coro->args, newSVsv (argv [i]));
2972 }
2973
2974 return coro_sv;
2975}
1729 2976
1730MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2977MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1731 2978
1732PROTOTYPES: DISABLE 2979PROTOTYPES: DISABLE
1733 2980
1734BOOT: 2981BOOT:
1735{ 2982{
1736#ifdef USE_ITHREADS 2983#ifdef USE_ITHREADS
1737 MUTEX_INIT (&coro_mutex); 2984# if CORO_PTHREAD
2985 coro_thx = PERL_GET_CONTEXT;
2986# endif
1738#endif 2987#endif
1739 BOOT_PAGESIZE; 2988 BOOT_PAGESIZE;
2989
2990 cctx_current = cctx_new_empty ();
1740 2991
1741 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2992 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1742 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2993 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1743 2994
1744 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2995 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1760 main_top_env = PL_top_env; 3011 main_top_env = PL_top_env;
1761 3012
1762 while (main_top_env->je_prev) 3013 while (main_top_env->je_prev)
1763 main_top_env = main_top_env->je_prev; 3014 main_top_env = main_top_env->je_prev;
1764 3015
3016 {
3017 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3018
3019 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3020 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3021
3022 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3023 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3024 }
3025
1765 coroapi.ver = CORO_API_VERSION; 3026 coroapi.ver = CORO_API_VERSION;
1766 coroapi.rev = CORO_API_REVISION; 3027 coroapi.rev = CORO_API_REVISION;
3028
1767 coroapi.transfer = api_transfer; 3029 coroapi.transfer = api_transfer;
3030
3031 coroapi.sv_state = SvSTATE_;
3032 coroapi.execute_slf = api_execute_slf;
3033 coroapi.prepare_nop = prepare_nop;
3034 coroapi.prepare_schedule = prepare_schedule;
3035 coroapi.prepare_cede = prepare_cede;
3036 coroapi.prepare_cede_notself = prepare_cede_notself;
1768 3037
1769 { 3038 {
1770 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3039 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1771 3040
1772 if (!svp) croak ("Time::HiRes is required"); 3041 if (!svp) croak ("Time::HiRes is required");
1773 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3042 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1774 3043
1775 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3044 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3045
3046 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3047 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
1776 } 3048 }
1777 3049
1778 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3050 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1779} 3051}
1780 3052
1781SV * 3053SV *
1782new (char *klass, ...) 3054new (SV *klass, ...)
3055 ALIAS:
3056 Coro::new = 1
1783 CODE: 3057 CODE:
1784{ 3058 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1785 struct coro *coro; 3059 OUTPUT:
1786 MAGIC *mg;
1787 HV *hv;
1788 int i;
1789
1790 Newz (0, coro, 1, struct coro);
1791 coro->args = newAV ();
1792 coro->flags = CF_NEW;
1793
1794 if (coro_first) coro_first->prev = coro;
1795 coro->next = coro_first;
1796 coro_first = coro;
1797
1798 coro->hv = hv = newHV ();
1799 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1800 mg->mg_flags |= MGf_DUP;
1801 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1802
1803 av_extend (coro->args, items - 1);
1804 for (i = 1; i < items; i++)
1805 av_push (coro->args, newSVsv (ST (i)));
1806}
1807 OUTPUT:
1808 RETVAL 3060 RETVAL
1809 3061
1810# these not obviously related functions are all rolled into the same xs
1811# function to increase chances that they all will call transfer with the same
1812# stack offset
1813void 3062void
1814_set_stacklevel (...) 3063transfer (...)
1815 ALIAS: 3064 PROTOTYPE: $$
1816 Coro::State::transfer = 1 3065 CODE:
1817 Coro::schedule = 2 3066 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1818 Coro::cede = 3
1819 Coro::cede_notself = 4
1820 CODE:
1821{
1822 struct transfer_args ta;
1823
1824 PUTBACK;
1825 switch (ix)
1826 {
1827 case 0:
1828 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1829 ta.next = 0;
1830 break;
1831
1832 case 1:
1833 if (items != 2)
1834 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1835
1836 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1837 break;
1838
1839 case 2:
1840 prepare_schedule (aTHX_ &ta);
1841 break;
1842
1843 case 3:
1844 prepare_cede (aTHX_ &ta);
1845 break;
1846
1847 case 4:
1848 if (!prepare_cede_notself (aTHX_ &ta))
1849 XSRETURN_EMPTY;
1850
1851 break;
1852 }
1853 SPAGAIN;
1854
1855 BARRIER;
1856 PUTBACK;
1857 TRANSFER (ta, 0);
1858 SPAGAIN; /* might be the sp of a different coroutine now */
1859 /* be extra careful not to ever do anything after TRANSFER */
1860}
1861 3067
1862bool 3068bool
1863_destroy (SV *coro_sv) 3069_destroy (SV *coro_sv)
1864 CODE: 3070 CODE:
1865 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3071 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1870_exit (int code) 3076_exit (int code)
1871 PROTOTYPE: $ 3077 PROTOTYPE: $
1872 CODE: 3078 CODE:
1873 _exit (code); 3079 _exit (code);
1874 3080
3081SV *
3082clone (Coro::State coro)
3083 CODE:
3084{
3085#if CORO_CLONE
3086 struct coro *ncoro = coro_clone (aTHX_ coro);
3087 MAGIC *mg;
3088 /* TODO: too much duplication */
3089 ncoro->hv = newHV ();
3090 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3091 mg->mg_flags |= MGf_DUP;
3092 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3093#else
3094 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3095#endif
3096}
3097 OUTPUT:
3098 RETVAL
3099
1875int 3100int
1876cctx_stacksize (int new_stacksize = 0) 3101cctx_stacksize (int new_stacksize = 0)
3102 PROTOTYPE: ;$
1877 CODE: 3103 CODE:
1878 RETVAL = coro_stacksize; 3104 RETVAL = cctx_stacksize;
1879 if (new_stacksize) 3105 if (new_stacksize)
3106 {
1880 coro_stacksize = new_stacksize; 3107 cctx_stacksize = new_stacksize;
3108 ++cctx_gen;
3109 }
1881 OUTPUT: 3110 OUTPUT:
1882 RETVAL 3111 RETVAL
1883 3112
1884int 3113int
3114cctx_max_idle (int max_idle = 0)
3115 PROTOTYPE: ;$
3116 CODE:
3117 RETVAL = cctx_max_idle;
3118 if (max_idle > 1)
3119 cctx_max_idle = max_idle;
3120 OUTPUT:
3121 RETVAL
3122
3123int
1885cctx_count () 3124cctx_count ()
3125 PROTOTYPE:
1886 CODE: 3126 CODE:
1887 RETVAL = cctx_count; 3127 RETVAL = cctx_count;
1888 OUTPUT: 3128 OUTPUT:
1889 RETVAL 3129 RETVAL
1890 3130
1891int 3131int
1892cctx_idle () 3132cctx_idle ()
3133 PROTOTYPE:
1893 CODE: 3134 CODE:
1894 RETVAL = cctx_idle; 3135 RETVAL = cctx_idle;
1895 OUTPUT: 3136 OUTPUT:
1896 RETVAL 3137 RETVAL
1897 3138
1898void 3139void
1899list () 3140list ()
3141 PROTOTYPE:
1900 PPCODE: 3142 PPCODE:
1901{ 3143{
1902 struct coro *coro; 3144 struct coro *coro;
1903 for (coro = coro_first; coro; coro = coro->next) 3145 for (coro = coro_first; coro; coro = coro->next)
1904 if (coro->hv) 3146 if (coro->hv)
… …
1911 eval = 1 3153 eval = 1
1912 CODE: 3154 CODE:
1913{ 3155{
1914 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3156 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1915 { 3157 {
1916 struct coro temp; 3158 struct coro *current = SvSTATE_current;
1917 3159
1918 if (!(coro->flags & CF_RUNNING)) 3160 if (current != coro)
1919 { 3161 {
1920 PUTBACK; 3162 PUTBACK;
1921 save_perl (aTHX_ &temp); 3163 save_perl (aTHX_ current);
1922 load_perl (aTHX_ coro); 3164 load_perl (aTHX_ coro);
3165 SPAGAIN;
1923 } 3166 }
1924 3167
1925 {
1926 dSP;
1927 ENTER;
1928 SAVETMPS;
1929 PUTBACK;
1930 PUSHSTACK; 3168 PUSHSTACK;
3169
1931 PUSHMARK (SP); 3170 PUSHMARK (SP);
3171 PUTBACK;
1932 3172
1933 if (ix) 3173 if (ix)
1934 eval_sv (coderef, 0); 3174 eval_sv (coderef, 0);
1935 else 3175 else
1936 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3176 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1937 3177
1938 POPSTACK; 3178 POPSTACK;
1939 SPAGAIN; 3179 SPAGAIN;
1940 FREETMPS;
1941 LEAVE;
1942 PUTBACK;
1943 }
1944 3180
1945 if (!(coro->flags & CF_RUNNING)) 3181 if (current != coro)
1946 { 3182 {
3183 PUTBACK;
1947 save_perl (aTHX_ coro); 3184 save_perl (aTHX_ coro);
1948 load_perl (aTHX_ &temp); 3185 load_perl (aTHX_ current);
1949 SPAGAIN; 3186 SPAGAIN;
1950 } 3187 }
1951 } 3188 }
1952} 3189}
1953 3190
… …
1957 ALIAS: 3194 ALIAS:
1958 is_ready = CF_READY 3195 is_ready = CF_READY
1959 is_running = CF_RUNNING 3196 is_running = CF_RUNNING
1960 is_new = CF_NEW 3197 is_new = CF_NEW
1961 is_destroyed = CF_DESTROYED 3198 is_destroyed = CF_DESTROYED
3199 is_suspended = CF_SUSPENDED
1962 CODE: 3200 CODE:
1963 RETVAL = boolSV (coro->flags & ix); 3201 RETVAL = boolSV (coro->flags & ix);
1964 OUTPUT: 3202 OUTPUT:
1965 RETVAL 3203 RETVAL
1966 3204
1967void 3205void
3206throw (Coro::State self, SV *throw = &PL_sv_undef)
3207 PROTOTYPE: $;$
3208 CODE:
3209{
3210 struct coro *current = SvSTATE_current;
3211 SV **throwp = self == current ? &CORO_THROW : &self->except;
3212 SvREFCNT_dec (*throwp);
3213 SvGETMAGIC (throw);
3214 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3215}
3216
3217void
1968api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3218api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3219 PROTOTYPE: $;$
3220 C_ARGS: aTHX_ coro, flags
1969 3221
1970SV * 3222SV *
1971has_cctx (Coro::State coro) 3223has_cctx (Coro::State coro)
1972 PROTOTYPE: $ 3224 PROTOTYPE: $
1973 CODE: 3225 CODE:
1974 RETVAL = boolSV (!!coro->cctx); 3226 /* maybe manage the running flag differently */
3227 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1975 OUTPUT: 3228 OUTPUT:
1976 RETVAL 3229 RETVAL
1977 3230
1978int 3231int
1979is_traced (Coro::State coro) 3232is_traced (Coro::State coro)
… …
1981 CODE: 3234 CODE:
1982 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3235 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983 OUTPUT: 3236 OUTPUT:
1984 RETVAL 3237 RETVAL
1985 3238
1986IV 3239UV
1987rss (Coro::State coro) 3240rss (Coro::State coro)
1988 PROTOTYPE: $ 3241 PROTOTYPE: $
1989 ALIAS: 3242 ALIAS:
1990 usecount = 1 3243 usecount = 1
1991 CODE: 3244 CODE:
… …
1997 OUTPUT: 3250 OUTPUT:
1998 RETVAL 3251 RETVAL
1999 3252
2000void 3253void
2001force_cctx () 3254force_cctx ()
3255 PROTOTYPE:
2002 CODE: 3256 CODE:
2003 struct coro *coro = SvSTATE (coro_current);
2004 coro->cctx->idle_sp = 0; 3257 cctx_current->idle_sp = 0;
2005
2006void
2007throw (Coro::State self, SV *throw = &PL_sv_undef)
2008 PROTOTYPE: $;$
2009 CODE:
2010 SvREFCNT_dec (self->throw);
2011 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2012 3258
2013void 3259void
2014swap_defsv (Coro::State self) 3260swap_defsv (Coro::State self)
2015 PROTOTYPE: $ 3261 PROTOTYPE: $
2016 ALIAS: 3262 ALIAS:
2017 swap_defav = 1 3263 swap_defav = 1
2018 CODE: 3264 CODE:
2019 if (!self->slot) 3265 if (!self->slot)
2020 croak ("cannot swap state with coroutine that has no saved state"); 3266 croak ("cannot swap state with coroutine that has no saved state,");
2021 else 3267 else
2022 { 3268 {
2023 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3269 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3270 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2025 3271
2026 SV *tmp = *src; *src = *dst; *dst = tmp; 3272 SV *tmp = *src; *src = *dst; *dst = tmp;
2027 } 3273 }
2028 3274
3275void
3276cancel (Coro::State self)
3277 CODE:
3278 coro_state_destroy (aTHX_ self);
3279 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3280
3281
3282SV *
3283enable_times (int enabled = enable_times)
3284 CODE:
3285{
3286 RETVAL = boolSV (enable_times);
3287
3288 if (enabled != enable_times)
3289 {
3290 enable_times = enabled;
3291
3292 coro_times_update ();
3293 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3294 }
3295}
3296 OUTPUT:
3297 RETVAL
3298
3299void
3300times (Coro::State self)
3301 PPCODE:
3302{
3303 struct coro *current = SvSTATE (coro_current);
3304
3305 if (expect_false (current == self))
3306 {
3307 coro_times_update ();
3308 coro_times_add (SvSTATE (coro_current));
3309 }
3310
3311 EXTEND (SP, 2);
3312 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3313 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3314
3315 if (expect_false (current == self))
3316 coro_times_sub (SvSTATE (coro_current));
3317}
3318
2029MODULE = Coro::State PACKAGE = Coro 3319MODULE = Coro::State PACKAGE = Coro
2030 3320
2031BOOT: 3321BOOT:
2032{ 3322{
2033 int i;
2034
2035 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2036 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3323 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2037 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3324 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2038 3325 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3326 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2039 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3327 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2040 SvREADONLY_on (coro_current); 3328 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3329 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3330 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3331 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2041 3332
3333 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3334 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3335 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3336 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3337
2042 coro_stash = gv_stashpv ("Coro", TRUE); 3338 coro_stash = gv_stashpv ("Coro", TRUE);
2043 3339
2044 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3340 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2045 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3341 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2046 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3342 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2047 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3343 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2048 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3344 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2049 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3345 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2050
2051 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2052 coro_ready[i] = newAV ();
2053 3346
2054 { 3347 {
2055 SV *sv = perl_get_sv ("Coro::API", TRUE); 3348 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2056 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2057 3349
2058 coroapi.schedule = api_schedule; 3350 coroapi.schedule = api_schedule;
3351 coroapi.schedule_to = api_schedule_to;
2059 coroapi.cede = api_cede; 3352 coroapi.cede = api_cede;
2060 coroapi.cede_notself = api_cede_notself; 3353 coroapi.cede_notself = api_cede_notself;
2061 coroapi.ready = api_ready; 3354 coroapi.ready = api_ready;
2062 coroapi.is_ready = api_is_ready; 3355 coroapi.is_ready = api_is_ready;
2063 coroapi.nready = &coro_nready; 3356 coroapi.nready = coro_nready;
2064 coroapi.current = coro_current; 3357 coroapi.current = coro_current;
2065 3358
2066 GCoroAPI = &coroapi; 3359 /*GCoroAPI = &coroapi;*/
2067 sv_setiv (sv, (IV)&coroapi); 3360 sv_setiv (sv, (IV)&coroapi);
2068 SvREADONLY_on (sv); 3361 SvREADONLY_on (sv);
2069 } 3362 }
2070} 3363}
3364
3365SV *
3366async (...)
3367 PROTOTYPE: &@
3368 CODE:
3369 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3370 api_ready (aTHX_ RETVAL);
3371 OUTPUT:
3372 RETVAL
3373
3374void
3375terminate (...)
3376 CODE:
3377 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3378
3379void
3380schedule (...)
3381 CODE:
3382 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3383
3384void
3385schedule_to (...)
3386 CODE:
3387 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3388
3389void
3390cede_to (...)
3391 CODE:
3392 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3393
3394void
3395cede (...)
3396 CODE:
3397 CORO_EXECUTE_SLF_XS (slf_init_cede);
3398
3399void
3400cede_notself (...)
3401 CODE:
3402 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2071 3403
2072void 3404void
2073_set_current (SV *current) 3405_set_current (SV *current)
2074 PROTOTYPE: $ 3406 PROTOTYPE: $
2075 CODE: 3407 CODE:
… …
2078 3410
2079void 3411void
2080_set_readyhook (SV *hook) 3412_set_readyhook (SV *hook)
2081 PROTOTYPE: $ 3413 PROTOTYPE: $
2082 CODE: 3414 CODE:
2083 LOCK;
2084 SvREFCNT_dec (coro_readyhook); 3415 SvREFCNT_dec (coro_readyhook);
3416 SvGETMAGIC (hook);
3417 if (SvOK (hook))
3418 {
2085 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3419 coro_readyhook = newSVsv (hook);
2086 UNLOCK; 3420 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3421 }
3422 else
3423 {
3424 coro_readyhook = 0;
3425 CORO_READYHOOK = 0;
3426 }
2087 3427
2088int 3428int
2089prio (Coro::State coro, int newprio = 0) 3429prio (Coro::State coro, int newprio = 0)
3430 PROTOTYPE: $;$
2090 ALIAS: 3431 ALIAS:
2091 nice = 1 3432 nice = 1
2092 CODE: 3433 CODE:
2093{ 3434{
2094 RETVAL = coro->prio; 3435 RETVAL = coro->prio;
… …
2096 if (items > 1) 3437 if (items > 1)
2097 { 3438 {
2098 if (ix) 3439 if (ix)
2099 newprio = coro->prio - newprio; 3440 newprio = coro->prio - newprio;
2100 3441
2101 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3442 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2102 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3443 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2103 3444
2104 coro->prio = newprio; 3445 coro->prio = newprio;
2105 } 3446 }
2106} 3447}
2107 OUTPUT: 3448 OUTPUT:
… …
2109 3450
2110SV * 3451SV *
2111ready (SV *self) 3452ready (SV *self)
2112 PROTOTYPE: $ 3453 PROTOTYPE: $
2113 CODE: 3454 CODE:
2114 RETVAL = boolSV (api_ready (self)); 3455 RETVAL = boolSV (api_ready (aTHX_ self));
2115 OUTPUT: 3456 OUTPUT:
2116 RETVAL 3457 RETVAL
2117 3458
2118int 3459int
2119nready (...) 3460nready (...)
… …
2121 CODE: 3462 CODE:
2122 RETVAL = coro_nready; 3463 RETVAL = coro_nready;
2123 OUTPUT: 3464 OUTPUT:
2124 RETVAL 3465 RETVAL
2125 3466
2126# for async_pool speedup
2127void 3467void
2128_pool_1 (SV *cb) 3468suspend (Coro::State self)
3469 PROTOTYPE: $
2129 CODE: 3470 CODE:
2130{ 3471 self->flags |= CF_SUSPENDED;
2131 struct coro *coro = SvSTATE (coro_current);
2132 HV *hv = (HV *)SvRV (coro_current);
2133 AV *defav = GvAV (PL_defgv);
2134 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2135 AV *invoke_av;
2136 int i, len;
2137 3472
2138 if (!invoke) 3473void
3474resume (Coro::State self)
3475 PROTOTYPE: $
3476 CODE:
3477 self->flags &= ~CF_SUSPENDED;
3478
3479void
3480_pool_handler (...)
3481 CODE:
3482 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3483
3484void
3485async_pool (SV *cv, ...)
3486 PROTOTYPE: &@
3487 PPCODE:
3488{
3489 HV *hv = (HV *)av_pop (av_async_pool);
3490 AV *av = newAV ();
3491 SV *cb = ST (0);
3492 int i;
3493
3494 av_extend (av, items - 2);
3495 for (i = 1; i < items; ++i)
3496 av_push (av, SvREFCNT_inc_NN (ST (i)));
3497
3498 if ((SV *)hv == &PL_sv_undef)
2139 { 3499 {
2140 SV *old = PL_diehook; 3500 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2141 PL_diehook = 0; 3501 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2142 SvREFCNT_dec (old); 3502 SvREFCNT_dec (sv);
2143 croak ("\3async_pool terminate\2\n");
2144 } 3503 }
2145 3504
2146 SvREFCNT_dec (coro->saved_deffh);
2147 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2148
2149 hv_store (hv, "desc", sizeof ("desc") - 1,
2150 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2151
2152 invoke_av = (AV *)SvRV (invoke);
2153 len = av_len (invoke_av);
2154
2155 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2156
2157 if (len > 0)
2158 { 3505 {
2159 av_fill (defav, len - 1); 3506 struct coro *coro = SvSTATE_hv (hv);
2160 for (i = 0; i < len; ++i) 3507
2161 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3508 assert (!coro->invoke_cb);
3509 assert (!coro->invoke_av);
3510 coro->invoke_cb = SvREFCNT_inc (cb);
3511 coro->invoke_av = av;
2162 } 3512 }
2163 3513
3514 api_ready (aTHX_ (SV *)hv);
3515
3516 if (GIMME_V != G_VOID)
3517 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3518 else
2164 SvREFCNT_dec (invoke); 3519 SvREFCNT_dec (hv);
2165} 3520}
2166 3521
2167void 3522SV *
2168_pool_2 (SV *cb) 3523rouse_cb ()
3524 PROTOTYPE:
2169 CODE: 3525 CODE:
2170{ 3526 RETVAL = coro_new_rouse_cb (aTHX);
2171 struct coro *coro = SvSTATE (coro_current);
2172
2173 sv_setsv (cb, &PL_sv_undef);
2174
2175 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2176 coro->saved_deffh = 0;
2177
2178 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2179 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180 {
2181 SV *old = PL_diehook;
2182 PL_diehook = 0;
2183 SvREFCNT_dec (old);
2184 croak ("\3async_pool terminate\2\n");
2185 }
2186
2187 av_clear (GvAV (PL_defgv));
2188 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2189 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190
2191 coro->prio = 0;
2192
2193 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194 api_trace (coro_current, 0);
2195
2196 av_push (av_async_pool, newSVsv (coro_current));
2197}
2198
2199#if 0
2200
2201void
2202_generator_call (...)
2203 PROTOTYPE: @
2204 PPCODE:
2205 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206 xxxx
2207 abort ();
2208
2209SV *
2210gensub (SV *sub, ...)
2211 PROTOTYPE: &;@
2212 CODE:
2213{
2214 struct coro *coro;
2215 MAGIC *mg;
2216 CV *xcv;
2217 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2218 int i;
2219
2220 CvGV (ncv) = CvGV (cv);
2221 CvFILE (ncv) = CvFILE (cv);
2222
2223 Newz (0, coro, 1, struct coro);
2224 coro->args = newAV ();
2225 coro->flags = CF_NEW;
2226
2227 av_extend (coro->args, items - 1);
2228 for (i = 1; i < items; i++)
2229 av_push (coro->args, newSVsv (ST (i)));
2230
2231 CvISXSUB_on (ncv);
2232 CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236 CvXSUB (ncv) = CvXSUB (xcv);
2237 CvANON_on (ncv);
2238
2239 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2240 RETVAL = newRV_noinc ((SV *)ncv);
2241}
2242 OUTPUT: 3527 OUTPUT:
2243 RETVAL 3528 RETVAL
2244 3529
2245#endif
2246
2247
2248MODULE = Coro::State PACKAGE = Coro::AIO
2249
2250void 3530void
2251_get_state (SV *self) 3531rouse_wait (...)
3532 PROTOTYPE: ;$
2252 PPCODE: 3533 PPCODE:
2253{ 3534 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2254 AV *defav = GvAV (PL_defgv);
2255 AV *av = newAV ();
2256 int i;
2257 SV *data_sv = newSV (sizeof (struct io_state));
2258 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2259 SvCUR_set (data_sv, sizeof (struct io_state));
2260 SvPOK_only (data_sv);
2261
2262 data->errorno = errno;
2263 data->laststype = PL_laststype;
2264 data->laststatval = PL_laststatval;
2265 data->statcache = PL_statcache;
2266
2267 av_extend (av, AvFILLp (defav) + 1 + 1);
2268
2269 for (i = 0; i <= AvFILLp (defav); ++i)
2270 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2271
2272 av_push (av, data_sv);
2273
2274 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2275
2276 api_ready (self);
2277}
2278 3535
2279void 3536void
2280_set_state (SV *state) 3537on_enter (SV *block)
3538 ALIAS:
3539 on_leave = 1
2281 PROTOTYPE: $ 3540 PROTOTYPE: &
3541 CODE:
3542{
3543 struct coro *coro = SvSTATE_current;
3544 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3545
3546 block = s_get_cv_croak (block);
3547
3548 if (!*avp)
3549 *avp = newAV ();
3550
3551 av_push (*avp, SvREFCNT_inc (block));
3552
3553 if (!ix)
3554 on_enterleave_call (aTHX_ block);
3555
3556 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3557 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3558 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3559}
3560
3561
3562MODULE = Coro::State PACKAGE = PerlIO::cede
3563
3564BOOT:
3565 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3566
3567
3568MODULE = Coro::State PACKAGE = Coro::Semaphore
3569
3570SV *
3571new (SV *klass, SV *count = 0)
3572 CODE:
3573{
3574 int semcnt = 1;
3575
3576 if (count)
3577 {
3578 SvGETMAGIC (count);
3579
3580 if (SvOK (count))
3581 semcnt = SvIV (count);
3582 }
3583
3584 RETVAL = sv_bless (
3585 coro_waitarray_new (aTHX_ semcnt),
3586 GvSTASH (CvGV (cv))
3587 );
3588}
3589 OUTPUT:
3590 RETVAL
3591
3592# helper for Coro::Channel and others
3593SV *
3594_alloc (int count)
3595 CODE:
3596 RETVAL = coro_waitarray_new (aTHX_ count);
3597 OUTPUT:
3598 RETVAL
3599
3600SV *
3601count (SV *self)
3602 CODE:
3603 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3604 OUTPUT:
3605 RETVAL
3606
3607void
3608up (SV *self, int adjust = 1)
3609 ALIAS:
3610 adjust = 1
3611 CODE:
3612 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3613
3614void
3615down (...)
3616 CODE:
3617 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3618
3619void
3620wait (...)
3621 CODE:
3622 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3623
3624void
3625try (SV *self)
3626 PPCODE:
3627{
3628 AV *av = (AV *)SvRV (self);
3629 SV *count_sv = AvARRAY (av)[0];
3630 IV count = SvIVX (count_sv);
3631
3632 if (count > 0)
3633 {
3634 --count;
3635 SvIVX (count_sv) = count;
3636 XSRETURN_YES;
3637 }
3638 else
3639 XSRETURN_NO;
3640}
3641
3642void
3643waiters (SV *self)
3644 PPCODE:
3645{
3646 AV *av = (AV *)SvRV (self);
3647 int wcount = AvFILLp (av) + 1 - 1;
3648
3649 if (GIMME_V == G_SCALAR)
3650 XPUSHs (sv_2mortal (newSViv (wcount)));
3651 else
3652 {
3653 int i;
3654 EXTEND (SP, wcount);
3655 for (i = 1; i <= wcount; ++i)
3656 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3657 }
3658}
3659
3660MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3661
3662void
3663_may_delete (SV *sem, int count, int extra_refs)
2282 PPCODE: 3664 PPCODE:
2283{ 3665{
2284 AV *av = (AV *)SvRV (state); 3666 AV *av = (AV *)SvRV (sem);
2285 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2286 int i;
2287 3667
2288 errno = data->errorno; 3668 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2289 PL_laststype = data->laststype; 3669 && AvFILLp (av) == 0 /* no waiters, just count */
2290 PL_laststatval = data->laststatval; 3670 && SvIV (AvARRAY (av)[0]) == count)
2291 PL_statcache = data->statcache; 3671 XSRETURN_YES;
2292 3672
3673 XSRETURN_NO;
3674}
3675
3676MODULE = Coro::State PACKAGE = Coro::Signal
3677
3678SV *
3679new (SV *klass)
3680 CODE:
3681 RETVAL = sv_bless (
3682 coro_waitarray_new (aTHX_ 0),
3683 GvSTASH (CvGV (cv))
3684 );
3685 OUTPUT:
3686 RETVAL
3687
3688void
3689wait (...)
3690 CODE:
3691 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3692
3693void
3694broadcast (SV *self)
3695 CODE:
3696{
3697 AV *av = (AV *)SvRV (self);
3698 coro_signal_wake (aTHX_ av, AvFILLp (av));
3699}
3700
3701void
3702send (SV *self)
3703 CODE:
3704{
3705 AV *av = (AV *)SvRV (self);
3706
2293 EXTEND (SP, AvFILLp (av)); 3707 if (AvFILLp (av))
2294 for (i = 0; i < AvFILLp (av); ++i) 3708 coro_signal_wake (aTHX_ av, 1);
2295 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3709 else
3710 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2296} 3711}
3712
3713IV
3714awaited (SV *self)
3715 CODE:
3716 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3717 OUTPUT:
3718 RETVAL
2297 3719
2298 3720
2299MODULE = Coro::State PACKAGE = Coro::AnyEvent 3721MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300 3722
2301BOOT: 3723BOOT:
2302 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3724 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303 3725
2304SV * 3726void
2305_schedule (...) 3727_schedule (...)
2306 PROTOTYPE: @
2307 CODE: 3728 CODE:
2308{ 3729{
2309 static int incede; 3730 static int incede;
2310 3731
2311 api_cede_notself (); 3732 api_cede_notself (aTHX);
2312 3733
2313 ++incede; 3734 ++incede;
2314 while (coro_nready >= incede && api_cede ()) 3735 while (coro_nready >= incede && api_cede (aTHX))
2315 ; 3736 ;
2316 3737
2317 sv_setsv (sv_activity, &PL_sv_undef); 3738 sv_setsv (sv_activity, &PL_sv_undef);
2318 if (coro_nready >= incede) 3739 if (coro_nready >= incede)
2319 { 3740 {
2320 PUSHMARK (SP); 3741 PUSHMARK (SP);
2321 PUTBACK; 3742 PUTBACK;
2322 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3743 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2323 SPAGAIN;
2324 } 3744 }
2325 3745
2326 --incede; 3746 --incede;
2327} 3747}
2328 3748
2329 3749
2330MODULE = Coro::State PACKAGE = PerlIO::cede 3750MODULE = Coro::State PACKAGE = Coro::AIO
2331 3751
2332BOOT: 3752void
2333 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3753_register (char *target, char *proto, SV *req)
3754 CODE:
3755{
3756 SV *req_cv = s_get_cv_croak (req);
3757 /* newXSproto doesn't return the CV on 5.8 */
3758 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3759 sv_setpv ((SV *)slf_cv, proto);
3760 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3761}
3762
3763MODULE = Coro::State PACKAGE = Coro::Select
3764
3765void
3766patch_pp_sselect ()
3767 CODE:
3768 if (!coro_old_pp_sselect)
3769 {
3770 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3771 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3772 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3773 }
3774
3775void
3776unpatch_pp_sselect ()
3777 CODE:
3778 if (coro_old_pp_sselect)
3779 {
3780 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3781 coro_old_pp_sselect = 0;
3782 }
3783
3784

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