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Comparing Coro/Coro/State.xs (file contents):
Revision 1.213 by root, Thu Oct 11 00:40:48 2007 UTC vs.
Revision 1.373 by root, Thu Oct 1 23:51:33 2009 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "schmorp.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
15#include <inttypes.h> /* portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif
16 25
17#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
18# include <unistd.h> 27# include <unistd.h>
19# include <sys/mman.h> 28# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
38#endif 47#endif
39 48
40#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 51#endif
46 52
47/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
49
50#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.7 */
78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89 55
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 57# undef CORO_STACKGUARD
92#endif 58#endif
93 59
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 67#endif
102 68
103/* 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
104 * 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
105#define dSTACKLEVEL volatile char stacklevel 75# define dSTACKLEVEL volatile void *stacklevel
106#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
107 78
108#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
109 80
110#if __GNUC__ >= 3 81#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value)) 83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
114#else 85#else
115# define attribute(x) 86# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr) 87# define expect(expr,value) (expr)
88# define INLINE static
118#endif 89#endif
119 90
120#define expect_false(expr) expect ((expr) != 0, 0) 91#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1) 92#define expect_true(expr) expect ((expr) != 0, 1)
122 93
123#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
124 95
125#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
126 98
127#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 100# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 103#endif
135 104
136/* helper storage struct for Coro::AIO */ 105#ifdef __linux
137struct io_state 106# include <time.h> /* for timespec */
138{ 107# include <syscall.h> /* for SYS_* */
139 int errorno; 108# ifdef SYS_clock_gettime
140 I32 laststype; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
141 int laststatval; 110# define CORO_CLOCK_MONOTONIC 1
142 Stat_t statcache; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
143}; 112# endif
113#endif
144 114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
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;
145static size_t coro_stacksize = CORO_STACKSIZE; 123static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 126static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
150static 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 */
151 133
152static GV *irsgv; /* $/ */ 134static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 135static GV *stdoutgv; /* *STDOUT */
154 136static SV *rv_diehook;
137static SV *rv_warnhook;
155static HV *hv_sig; /* %SIG */ 138static HV *hv_sig; /* %SIG */
156static SV *sv_diehook;
157static SV *sv_warnhook;
158 139
159/* async_pool helper stuff */ 140/* async_pool helper stuff */
160static SV *sv_pool_rss; 141static SV *sv_pool_rss;
161static SV *sv_pool_size; 142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
162static AV *av_async_pool; 144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147
148/* Coro::AnyEvent */
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;
163 156
164static struct coro_cctx *cctx_first; 157static struct coro_cctx *cctx_first;
165static int cctx_count, cctx_idle; 158static int cctx_count, cctx_idle;
166 159
167enum { 160enum {
… …
172 CC_TRACE_LINE = 0x10, /* trace each statement */ 165 CC_TRACE_LINE = 0x10, /* trace each statement */
173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
174}; 167};
175 168
176/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
177typedef struct coro_cctx { 170typedef struct coro_cctx
171{
178 struct coro_cctx *next; 172 struct coro_cctx *next;
179 173
180 /* the stack */ 174 /* the stack */
181 void *sptr; 175 void *sptr;
182 size_t ssize; 176 size_t ssize;
… …
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 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 */
187 JMPENV *top_env; 181 JMPENV *top_env;
188 coro_context cctx; 182 coro_context cctx;
189 183
184 U32 gen;
190#if CORO_USE_VALGRIND 185#if CORO_USE_VALGRIND
191 int valgrind_id; 186 int valgrind_id;
192#endif 187#endif
193 unsigned char flags; 188 unsigned char flags;
194} coro_cctx; 189} coro_cctx;
195 190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
196enum { 195enum {
197 CF_RUNNING = 0x0001, /* coroutine is running */ 196 CF_RUNNING = 0x0001, /* coroutine is running */
198 CF_READY = 0x0002, /* coroutine is ready */ 197 CF_READY = 0x0002, /* coroutine is ready */
199 CF_NEW = 0x0004, /* has never been switched to */ 198 CF_NEW = 0x0004, /* has never been switched to */
200 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 */
201}; 201};
202 202
203/* 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 */
204typedef struct { 204typedef struct
205{
205 SV *defsv; 206 SV *defsv;
206 AV *defav; 207 AV *defav;
207 SV *errsv; 208 SV *errsv;
208 SV *irsgv; 209 SV *irsgv;
210 HV *hinthv;
209#define VAR(name,type) type name; 211#define VAR(name,type) type name;
210# include "state.h" 212# include "state.h"
211#undef VAR 213#undef VAR
212} perl_slots; 214} perl_slots;
213 215
214#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))
215 217
216/* this is a structure representing a perl-level coroutine */ 218/* this is a structure representing a perl-level coroutine */
217struct coro { 219struct coro {
218 /* the c coroutine allocated to this perl coroutine, if any */ 220 /* the C coroutine allocated to this perl coroutine, if any */
219 coro_cctx *cctx; 221 coro_cctx *cctx;
220 222
221 /* process data */ 223 /* ready queue */
224 struct coro *next_ready;
225
226 /* state data */
227 struct CoroSLF slf_frame; /* saved slf frame */
222 AV *mainstack; 228 AV *mainstack;
223 perl_slots *slot; /* basically the saved sp */ 229 perl_slots *slot; /* basically the saved sp */
224 230
231 CV *startcv; /* the CV to execute */
225 AV *args; /* data associated with this coroutine (initial args) */ 232 AV *args; /* data associated with this coroutine (initial args) */
226 int refcnt; /* coroutines are refcounted, yes */ 233 int refcnt; /* coroutines are refcounted, yes */
227 int flags; /* CF_ flags */ 234 int flags; /* CF_ flags */
228 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);
229 237
230 /* statistics */ 238 /* statistics */
231 int usecount; /* number of transfers to this coro */ 239 int usecount; /* number of transfers to this coro */
232 240
233 /* coro process data */ 241 /* coro process data */
234 int prio; 242 int prio;
235 SV *throw; /* exception to be thrown */ 243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
236 245
237 /* async_pool */ 246 /* async_pool */
238 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;
239 257
240 /* linked list */ 258 /* linked list */
241 struct coro *next, *prev; 259 struct coro *next, *prev;
242}; 260};
243 261
244typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
245typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
246 264
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
247/** Coro ********************************************************************/ 270/** Coro ********************************************************************/
248 271
249#define PRIO_MAX 3 272#define CORO_PRIO_MAX 3
250#define PRIO_HIGH 1 273#define CORO_PRIO_HIGH 1
251#define PRIO_NORMAL 0 274#define CORO_PRIO_NORMAL 0
252#define PRIO_LOW -1 275#define CORO_PRIO_LOW -1
253#define PRIO_IDLE -3 276#define CORO_PRIO_IDLE -3
254#define PRIO_MIN -4 277#define CORO_PRIO_MIN -4
255 278
256/* for Coro.pm */ 279/* for Coro.pm */
257static SV *coro_current; 280static SV *coro_current;
258static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 281static SV *coro_readyhook;
259static int coro_nready; 282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
283static CV *cv_coro_run, *cv_coro_terminate;
260static 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}
261 306
262/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
263 308
264static SV * 309static SV *
265coro_get_sv (pTHX_ const char *name, int create) 310coro_get_sv (pTHX_ const char *name, int create)
266{ 311{
267#if PERL_VERSION_ATLEAST (5,9,0) 312#if PERL_VERSION_ATLEAST (5,10,0)
268 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
269 get_sv (name, create); 314 get_sv (name, create);
270#endif 315#endif
271 return get_sv (name, create); 316 return get_sv (name, create);
272} 317}
273 318
274static AV * 319static AV *
275coro_get_av (pTHX_ const char *name, int create) 320coro_get_av (pTHX_ const char *name, int create)
276{ 321{
277#if PERL_VERSION_ATLEAST (5,9,0) 322#if PERL_VERSION_ATLEAST (5,10,0)
278 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
279 get_av (name, create); 324 get_av (name, create);
280#endif 325#endif
281 return get_av (name, create); 326 return get_av (name, create);
282} 327}
283 328
284static HV * 329static HV *
285coro_get_hv (pTHX_ const char *name, int create) 330coro_get_hv (pTHX_ const char *name, int create)
286{ 331{
287#if PERL_VERSION_ATLEAST (5,9,0) 332#if PERL_VERSION_ATLEAST (5,10,0)
288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
289 get_hv (name, create); 334 get_hv (name, create);
290#endif 335#endif
291 return get_hv (name, create); 336 return get_hv (name, create);
292} 337}
293 338
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
294static AV * 438static AV *
295coro_clone_padlist (pTHX_ CV *cv) 439coro_derive_padlist (pTHX_ CV *cv)
296{ 440{
297 AV *padlist = CvPADLIST (cv); 441 AV *padlist = CvPADLIST (cv);
298 AV *newpadlist, *newpad; 442 AV *newpadlist, *newpad;
299 443
300 newpadlist = newAV (); 444 newpadlist = newAV ();
301 AvREAL_off (newpadlist); 445 AvREAL_off (newpadlist);
302#if PERL_VERSION_ATLEAST (5,9,0) 446#if PERL_VERSION_ATLEAST (5,10,0)
303 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 447 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
304#else 448#else
305 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
306#endif 450#endif
307 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
308 --AvFILLp (padlist); 452 --AvFILLp (padlist);
309 453
310 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
311 av_store (newpadlist, 1, (SV *)newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
312 456
313 return newpadlist; 457 return newpadlist;
314} 458}
315 459
316static void 460static void
317free_padlist (pTHX_ AV *padlist) 461free_padlist (pTHX_ AV *padlist)
318{ 462{
319 /* may be during global destruction */ 463 /* may be during global destruction */
320 if (SvREFCNT (padlist)) 464 if (!IN_DESTRUCT)
321 { 465 {
322 I32 i = AvFILLp (padlist); 466 I32 i = AvFILLp (padlist);
323 while (i >= 0) 467
468 while (i > 0) /* special-case index 0 */
324 { 469 {
325 SV **svp = av_fetch (padlist, i--, FALSE); 470 /* we try to be extra-careful here */
326 if (svp) 471 AV *av = (AV *)AvARRAY (padlist)[i--];
327 { 472 I32 j = AvFILLp (av);
328 SV *sv; 473
329 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 474 while (j >= 0)
475 SvREFCNT_dec (AvARRAY (av)[j--]);
476
477 AvFILLp (av) = -1;
330 SvREFCNT_dec (sv); 478 SvREFCNT_dec (av);
331
332 SvREFCNT_dec (*svp);
333 }
334 } 479 }
335 480
481 SvREFCNT_dec (AvARRAY (padlist)[0]);
482
483 AvFILLp (padlist) = -1;
336 SvREFCNT_dec ((SV*)padlist); 484 SvREFCNT_dec ((SV*)padlist);
337 } 485 }
338} 486}
339 487
340static int 488static int
341coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
342{ 490{
343 AV *padlist; 491 AV *padlist;
344 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;
345 497
346 /* casting is fun. */ 498 /* casting is fun. */
347 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
348 free_padlist (aTHX_ padlist); 500 free_padlist (aTHX_ padlist);
349 501
350 SvREFCNT_dec (av); 502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
351 503
352 return 0; 504 return 0;
353} 505}
354 506
355#define PERL_MAGIC_coro PERL_MAGIC_ext 507static MGVTBL coro_cv_vtbl = {
356 508 0, 0, 0, 0,
357static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 509 coro_cv_free
358 510};
359#define CORO_MAGIC(cv) \
360 SvMAGIC (cv) \
361 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
362 ? SvMAGIC (cv) \
363 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
364 : 0
365
366static struct coro *
367SvSTATE_ (pTHX_ SV *coro)
368{
369 HV *stash;
370 MAGIC *mg;
371
372 if (SvROK (coro))
373 coro = SvRV (coro);
374
375 if (expect_false (SvTYPE (coro) != SVt_PVHV))
376 croak ("Coro::State object required");
377
378 stash = SvSTASH (coro);
379 if (expect_false (stash != coro_stash && stash != coro_state_stash))
380 {
381 /* very slow, but rare, check */
382 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
383 croak ("Coro::State object required");
384 }
385
386 mg = CORO_MAGIC (coro);
387 return (struct coro *)mg->mg_ptr;
388}
389
390#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
391 511
392/* the next two functions merely cache the padlists */ 512/* the next two functions merely cache the padlists */
393static void 513static void
394get_padlist (pTHX_ CV *cv) 514get_padlist (pTHX_ CV *cv)
395{ 515{
396 MAGIC *mg = CORO_MAGIC (cv); 516 MAGIC *mg = CORO_MAGIC_cv (cv);
397 AV *av; 517 AV *av;
398 518
399 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 519 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
400 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 520 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
401 else 521 else
402 { 522 {
403#if CORO_PREFER_PERL_FUNCTIONS 523#if CORO_PREFER_PERL_FUNCTIONS
404 /* this is probably cleaner, but also slower? */ 524 /* this is probably cleaner? but also slower! */
525 /* in practise, it seems to be less stable */
405 CV *cp = Perl_cv_clone (cv); 526 CV *cp = Perl_cv_clone (aTHX_ cv);
406 CvPADLIST (cv) = CvPADLIST (cp); 527 CvPADLIST (cv) = CvPADLIST (cp);
407 CvPADLIST (cp) = 0; 528 CvPADLIST (cp) = 0;
408 SvREFCNT_dec (cp); 529 SvREFCNT_dec (cp);
409#else 530#else
410 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
411#endif 532#endif
412 } 533 }
413} 534}
414 535
415static void 536static void
416put_padlist (pTHX_ CV *cv) 537put_padlist (pTHX_ CV *cv)
417{ 538{
418 MAGIC *mg = CORO_MAGIC (cv); 539 MAGIC *mg = CORO_MAGIC_cv (cv);
419 AV *av; 540 AV *av;
420 541
421 if (expect_false (!mg)) 542 if (expect_false (!mg))
422 { 543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
423 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
424 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
425 mg->mg_virtual = &vtbl_coro;
426 mg->mg_obj = (SV *)newAV ();
427 }
428 544
429 av = (AV *)mg->mg_obj; 545 av = (AV *)mg->mg_obj;
430 546
431 if (expect_false (AvFILLp (av) >= AvMAX (av))) 547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
432 av_extend (av, AvMAX (av) + 1); 548 av_extend (av, AvFILLp (av) + 1);
433 549
434 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
435} 551}
436 552
437/** load & save, init *******************************************************/ 553/** load & save, init *******************************************************/
554
555static void
556on_enterleave_call (pTHX_ SV *cb);
438 557
439static void 558static void
440load_perl (pTHX_ Coro__State c) 559load_perl (pTHX_ Coro__State c)
441{ 560{
442 perl_slots *slot = c->slot; 561 perl_slots *slot = c->slot;
443 c->slot = 0; 562 c->slot = 0;
444 563
445 PL_mainstack = c->mainstack; 564 PL_mainstack = c->mainstack;
446 565
447 GvSV (PL_defgv) = slot->defsv; 566 GvSV (PL_defgv) = slot->defsv;
448 GvAV (PL_defgv) = slot->defav; 567 GvAV (PL_defgv) = slot->defav;
449 GvSV (PL_errgv) = slot->errsv; 568 GvSV (PL_errgv) = slot->errsv;
450 GvSV (irsgv) = slot->irsgv; 569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
451 571
452 #define VAR(name,type) PL_ ## name = slot->name; 572 #define VAR(name,type) PL_ ## name = slot->name;
453 # include "state.h" 573 # include "state.h"
454 #undef VAR 574 #undef VAR
455
456 /*hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);*/
457 /*hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);*/
458 575
459 { 576 {
460 dSP; 577 dSP;
461 578
462 CV *cv; 579 CV *cv;
… …
469 CvPADLIST (cv) = (AV *)POPs; 586 CvPADLIST (cv) = (AV *)POPs;
470 } 587 }
471 588
472 PUTBACK; 589 PUTBACK;
473 } 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 }
474} 610}
475 611
476static void 612static void
477save_perl (pTHX_ Coro__State c) 613save_perl (pTHX_ Coro__State c)
478{ 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
479 { 634 {
480 dSP; 635 dSP;
481 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
482 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
483 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
493 { 648 {
494 while (expect_true (cxix >= 0)) 649 while (expect_true (cxix >= 0))
495 { 650 {
496 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
497 652
498 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))
499 { 654 {
500 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
501 656
502 if (expect_true (CvDEPTH (cv))) 657 if (expect_true (CvDEPTH (cv)))
503 { 658 {
504 EXTEND (SP, 3); 659 EXTEND (SP, 3);
505 PUSHs ((SV *)CvPADLIST (cv)); 660 PUSHs ((SV *)CvPADLIST (cv));
506 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 661 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
507 PUSHs ((SV *)cv); 662 PUSHs ((SV *)cv);
508 663
509 CvDEPTH (cv) = 0; 664 CvDEPTH (cv) = 0;
510 get_padlist (aTHX_ cv); 665 get_padlist (aTHX_ cv);
511 } 666 }
… …
527 /* we manually unroll here, as usually 2 slots is enough */ 682 /* we manually unroll here, as usually 2 slots is enough */
528 if (SLOT_COUNT >= 1) CXINC; 683 if (SLOT_COUNT >= 1) CXINC;
529 if (SLOT_COUNT >= 2) CXINC; 684 if (SLOT_COUNT >= 2) CXINC;
530 if (SLOT_COUNT >= 3) CXINC; 685 if (SLOT_COUNT >= 3) CXINC;
531 { 686 {
532 int i; 687 unsigned int i;
533 for (i = 3; i < SLOT_COUNT; ++i) 688 for (i = 3; i < SLOT_COUNT; ++i)
534 CXINC; 689 CXINC;
535 } 690 }
536 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
537 692
538 c->mainstack = PL_mainstack; 693 c->mainstack = PL_mainstack;
539 694
540 { 695 {
541 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
542 697
543 slot->defav = GvAV (PL_defgv); 698 slot->defav = GvAV (PL_defgv);
544 slot->defsv = DEFSV; 699 slot->defsv = DEFSV;
545 slot->errsv = ERRSV; 700 slot->errsv = ERRSV;
546 slot->irsgv = GvSV (irsgv); 701 slot->irsgv = GvSV (irsgv);
702 slot->hinthv = GvHV (PL_hintgv);
547 703
548 #define VAR(name,type) slot->name = PL_ ## name; 704 #define VAR(name,type) slot->name = PL_ ## name;
549 # include "state.h" 705 # include "state.h"
550 #undef VAR 706 #undef VAR
551 } 707 }
552} 708}
553 709
554/* 710/*
555 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
556 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
557 * on the (sometimes correct) assumption that coroutines do 713 * on the (sometimes correct) assumption that coroutines do
558 * not usually need a lot of stackspace. 714 * not usually need a lot of stackspace.
559 */ 715 */
560#if CORO_PREFER_PERL_FUNCTIONS 716#if CORO_PREFER_PERL_FUNCTIONS
561# define coro_init_stacks init_stacks 717# define coro_init_stacks(thx) init_stacks ()
562#else 718#else
563static void 719static void
564coro_init_stacks (pTHX) 720coro_init_stacks (pTHX)
565{ 721{
566 PL_curstackinfo = new_stackinfo(32, 8); 722 PL_curstackinfo = new_stackinfo(32, 8);
… …
591 747
592 New(54,PL_savestack,24,ANY); 748 New(54,PL_savestack,24,ANY);
593 PL_savestack_ix = 0; 749 PL_savestack_ix = 0;
594 PL_savestack_max = 24; 750 PL_savestack_max = 24;
595 751
596#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
597 New(54,PL_retstack,4,OP*); 753 New(54,PL_retstack,4,OP*);
598 PL_retstack_ix = 0; 754 PL_retstack_ix = 0;
599 PL_retstack_max = 4; 755 PL_retstack_max = 4;
600#endif 756#endif
601} 757}
… …
603 759
604/* 760/*
605 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
606 */ 762 */
607static void 763static void
608coro_destroy_stacks (pTHX) 764coro_destruct_stacks (pTHX)
609{ 765{
610 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
611 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
612 768
613 while (PL_curstackinfo) 769 while (PL_curstackinfo)
… …
624 780
625 Safefree (PL_tmps_stack); 781 Safefree (PL_tmps_stack);
626 Safefree (PL_markstack); 782 Safefree (PL_markstack);
627 Safefree (PL_scopestack); 783 Safefree (PL_scopestack);
628 Safefree (PL_savestack); 784 Safefree (PL_savestack);
629#if !PERL_VERSION_ATLEAST (5,9,0) 785#if !PERL_VERSION_ATLEAST (5,10,0)
630 Safefree (PL_retstack); 786 Safefree (PL_retstack);
631#endif 787#endif
632} 788}
633 789
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
634static size_t 799static size_t
635coro_rss (pTHX_ struct coro *coro) 800coro_rss (pTHX_ struct coro *coro)
636{ 801{
637 size_t rss = sizeof (*coro); 802 size_t rss = sizeof (*coro);
638 803
639 if (coro->mainstack) 804 if (coro->mainstack)
640 { 805 {
641 perl_slots tmp_slot;
642 perl_slots *slot;
643
644 if (coro->flags & CF_RUNNING) 806 if (coro->flags & CF_RUNNING)
645 { 807 {
646 slot = &tmp_slot; 808 #define SYM(sym) PL_ ## sym
647 809 CORO_RSS;
648 #define VAR(name,type) slot->name = PL_ ## name;
649 # include "state.h"
650 #undef VAR 810 #undef SYM
651 } 811 }
652 else 812 else
653 slot = coro->slot; 813 {
814 #define SYM(sym) coro->slot->sym
815 CORO_RSS;
816 #undef SYM
817 }
818 }
654 819
655 rss += sizeof (slot->curstackinfo); 820 return rss;
656 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 821}
657 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
658 rss += slot->tmps_max * sizeof (SV *);
659 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
660 rss += slot->scopestack_max * sizeof (I32);
661 rss += slot->savestack_max * sizeof (ANY);
662 822
663#if !PERL_VERSION_ATLEAST (5,9,0) 823/** coroutine stack handling ************************************************/
664 rss += slot->retstack_max * sizeof (OP *); 824
825static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
826static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
828
829/* apparently < 5.8.8 */
830#ifndef MgPV_nolen_const
831#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
832 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
833 (const char*)(mg)->mg_ptr)
665#endif 834#endif
835
836/*
837 * This overrides the default magic get method of %SIG elements.
838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
839 * and instead of trying to save and restore the hash elements, we just provide
840 * readback here.
841 */
842static int
843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
844{
845 const char *s = MgPV_nolen_const (mg);
846
847 if (*s == '_')
666 } 848 {
849 SV **svp = 0;
667 850
851 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
852 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
853
854 if (svp)
855 {
856 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
857 return 0;
858 }
859 }
860
861 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
862}
863
864static int
865coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
866{
867 const char *s = MgPV_nolen_const (mg);
868
869 if (*s == '_')
870 {
871 SV **svp = 0;
872
873 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
874 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
875
876 if (svp)
877 {
878 SV *old = *svp;
879 *svp = 0;
880 SvREFCNT_dec (old);
881 return 0;
882 }
883 }
884
885 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
886}
887
888static int
889coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
890{
891 const char *s = MgPV_nolen_const (mg);
892
893 if (*s == '_')
894 {
895 SV **svp = 0;
896
897 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
899
900 if (svp)
901 {
902 SV *old = *svp;
903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
904 SvREFCNT_dec (old);
905 return 0;
906 }
907 }
908
909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
910}
911
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{
668 return rss; 922 return 0;
669} 923}
670 924
671/** coroutine stack handling ************************************************/
672
673static void 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 */
674coro_setup (pTHX_ struct coro *coro) 934coro_setup (pTHX_ struct coro *coro)
675{ 935{
676 /* 936 /*
677 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
678 */ 938 */
… …
680 940
681 PL_runops = RUNOPS_DEFAULT; 941 PL_runops = RUNOPS_DEFAULT;
682 PL_curcop = &PL_compiling; 942 PL_curcop = &PL_compiling;
683 PL_in_eval = EVAL_NULL; 943 PL_in_eval = EVAL_NULL;
684 PL_comppad = 0; 944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
685 PL_curpm = 0; 948 PL_curpm = 0;
686 PL_curpad = 0; 949 PL_curpad = 0;
687 PL_localizing = 0; 950 PL_localizing = 0;
688 PL_dirty = 0; 951 PL_dirty = 0;
689 PL_restartop = 0; 952 PL_restartop = 0;
953#if PERL_VERSION_ATLEAST (5,10,0)
954 PL_parser = 0;
955#endif
956 PL_hints = 0;
957
958 /* recreate the die/warn hooks */
690 PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0); 959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
691 PL_warnhook = 0; hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0); 960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
692 961
693 GvSV (PL_defgv) = newSV (0); 962 GvSV (PL_defgv) = newSV (0);
694 GvAV (PL_defgv) = coro->args; coro->args = 0; 963 GvAV (PL_defgv) = coro->args; coro->args = 0;
695 GvSV (PL_errgv) = newSV (0); 964 GvSV (PL_errgv) = newSV (0);
696 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;
697 PL_rs = newSVsv (GvSV (irsgv)); 967 PL_rs = newSVsv (GvSV (irsgv));
698 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
699 969
700 { 970 {
701 dSP; 971 dSP;
702 LOGOP myop; 972 UNOP myop;
703 973
704 Zero (&myop, 1, LOGOP); 974 Zero (&myop, 1, UNOP);
705 myop.op_next = Nullop; 975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
706 myop.op_flags = OPf_WANT_VOID; 977 myop.op_flags = OPf_WANT_VOID;
707 978
708 PUSHMARK (SP); 979 PUSHMARK (SP);
709 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 980 PUSHs ((SV *)coro->startcv);
710 PUTBACK; 981 PUTBACK;
711 PL_op = (OP *)&myop; 982 PL_op = (OP *)&myop;
712 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
713 SPAGAIN;
714 } 984 }
715 985
716 /* 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
717 * 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.
718 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
719 * so we ENTER here for symmetry
720 */ 988 */
721 ENTER; 989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
722} 990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
723 991
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
724static void 1010static void
725coro_destroy (pTHX_ struct coro *coro) 1011coro_unwind_stacks (pTHX)
726{ 1012{
727 if (!IN_DESTRUCT) 1013 if (!IN_DESTRUCT)
728 { 1014 {
729 /* restore all saved variables and stuff */ 1015 /* restore all saved variables and stuff */
730 LEAVE_SCOPE (0); 1016 LEAVE_SCOPE (0);
… …
738 POPSTACK_TO (PL_mainstack); 1024 POPSTACK_TO (PL_mainstack);
739 1025
740 /* unwind main stack */ 1026 /* unwind main stack */
741 dounwind (-1); 1027 dounwind (-1);
742 } 1028 }
1029}
743 1030
744 SvREFCNT_dec (GvSV (PL_defgv)); 1031static void
745 SvREFCNT_dec (GvAV (PL_defgv)); 1032coro_destruct_perl (pTHX_ struct coro *coro)
746 SvREFCNT_dec (GvSV (PL_errgv)); 1033{
747 SvREFCNT_dec (PL_defoutgv); 1034 SV *svf [9];
748 SvREFCNT_dec (PL_rs);
749 SvREFCNT_dec (GvSV (irsgv));
750 1035
751 SvREFCNT_dec (PL_diehook);
752 SvREFCNT_dec (PL_warnhook);
753 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
754 SvREFCNT_dec (coro->saved_deffh); 1068 SvREFCNT_dec (coro->saved_deffh);
755 SvREFCNT_dec (coro->throw); 1069 SvREFCNT_dec (coro->rouse_cb);
756 1070 SvREFCNT_dec (coro->invoke_cb);
757 coro_destroy_stacks (aTHX); 1071 SvREFCNT_dec (coro->invoke_av);
1072 }
758} 1073}
759 1074
760static void 1075INLINE void
761free_coro_mortal (pTHX) 1076free_coro_mortal (pTHX)
762{ 1077{
763 if (expect_true (coro_mortal)) 1078 if (expect_true (coro_mortal))
764 { 1079 {
765 SvREFCNT_dec (coro_mortal); 1080 SvREFCNT_dec (coro_mortal);
… …
770static int 1085static int
771runops_trace (pTHX) 1086runops_trace (pTHX)
772{ 1087{
773 COP *oldcop = 0; 1088 COP *oldcop = 0;
774 int oldcxix = -2; 1089 int oldcxix = -2;
775 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
776 coro_cctx *cctx = coro->cctx;
777 1090
778 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
779 { 1092 {
780 PERL_ASYNC_CHECK (); 1093 PERL_ASYNC_CHECK ();
781 1094
782 if (cctx->flags & CC_TRACE_ALL) 1095 if (cctx_current->flags & CC_TRACE_ALL)
783 { 1096 {
784 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)
785 { 1098 {
786 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
787 SV **bot, **top; 1100 SV **bot, **top;
788 AV *av = newAV (); /* return values */ 1101 AV *av = newAV (); /* return values */
789 SV **cb; 1102 SV **cb;
… …
799 : cx->blk_gimme == G_SCALAR ? bot + 1 1112 : cx->blk_gimme == G_SCALAR ? bot + 1
800 : bot; 1113 : bot;
801 1114
802 av_extend (av, top - bot); 1115 av_extend (av, top - bot);
803 while (bot < top) 1116 while (bot < top)
804 av_push (av, SvREFCNT_inc (*bot++)); 1117 av_push (av, SvREFCNT_inc_NN (*bot++));
805 1118
806 PL_runops = RUNOPS_DEFAULT; 1119 PL_runops = RUNOPS_DEFAULT;
807 ENTER; 1120 ENTER;
808 SAVETMPS; 1121 SAVETMPS;
809 EXTEND (SP, 3); 1122 EXTEND (SP, 3);
… …
826 1139
827 if (PL_curcop != &PL_compiling) 1140 if (PL_curcop != &PL_compiling)
828 { 1141 {
829 SV **cb; 1142 SV **cb;
830 1143
831 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
832 { 1145 {
833 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
834 1147
835 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
836 { 1149 {
837 runops_proc_t old_runops = PL_runops;
838 dSP; 1150 dSP;
839 GV *gv = CvGV (cx->blk_sub.cv); 1151 GV *gv = CvGV (cx->blk_sub.cv);
840 SV *fullname = sv_2mortal (newSV (0)); 1152 SV *fullname = sv_2mortal (newSV (0));
841 1153
842 if (isGV (gv)) 1154 if (isGV (gv))
… …
847 SAVETMPS; 1159 SAVETMPS;
848 EXTEND (SP, 3); 1160 EXTEND (SP, 3);
849 PUSHMARK (SP); 1161 PUSHMARK (SP);
850 PUSHs (&PL_sv_yes); 1162 PUSHs (&PL_sv_yes);
851 PUSHs (fullname); 1163 PUSHs (fullname);
852 PUSHs (cx->blk_sub.hasargs ? 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);
853 PUTBACK; 1165 PUTBACK;
854 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);
855 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);
856 SPAGAIN; 1168 SPAGAIN;
857 FREETMPS; 1169 FREETMPS;
… …
860 } 1172 }
861 1173
862 oldcxix = cxstack_ix; 1174 oldcxix = cxstack_ix;
863 } 1175 }
864 1176
865 if (cctx->flags & CC_TRACE_LINE) 1177 if (cctx_current->flags & CC_TRACE_LINE)
866 { 1178 {
867 dSP; 1179 dSP;
868 1180
869 PL_runops = RUNOPS_DEFAULT; 1181 PL_runops = RUNOPS_DEFAULT;
870 ENTER; 1182 ENTER;
… …
889 1201
890 TAINT_NOT; 1202 TAINT_NOT;
891 return 0; 1203 return 0;
892} 1204}
893 1205
894/* inject a fake call to Coro::State::_cctx_init into the execution */ 1206static struct CoroSLF cctx_ssl_frame;
895/* _cctx_init should be careful, as it could be called at almost any time */ 1207
896/* 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 */
897static void NOINLINE 1223static void NOINLINE
898cctx_prepare (pTHX_ coro_cctx *cctx) 1224cctx_prepare (pTHX)
899{ 1225{
900 dSP;
901 LOGOP myop;
902
903 PL_top_env = &PL_start_env; 1226 PL_top_env = &PL_start_env;
904 1227
905 if (cctx->flags & CC_TRACE) 1228 if (cctx_current->flags & CC_TRACE)
906 PL_runops = runops_trace; 1229 PL_runops = runops_trace;
907 1230
908 Zero (&myop, 1, LOGOP); 1231 /* we already must be executing an SLF op, there is no other valid way
909 myop.op_next = PL_op; 1232 * that can lead to creation of a new cctx */
910 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));
911 1235
912 PUSHMARK (SP); 1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
913 EXTEND (SP, 2); 1237 cctx_ssl_frame = slf_frame;
914 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1238
915 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1239 slf_frame.prepare = slf_prepare_set_stacklevel;
916 PUTBACK; 1240 slf_frame.check = slf_check_set_stacklevel;
917 PL_op = (OP *)&myop; 1241}
918 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1242
919 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);
920} 1248}
921 1249
922/* 1250/*
923 * this is a _very_ stripped down perl interpreter ;) 1251 * this is a _very_ stripped down perl interpreter ;)
924 */ 1252 */
925static void 1253static void
926cctx_run (void *arg) 1254cctx_run (void *arg)
927{ 1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
928 dTHX; 1262 dTHX;
929 1263
930 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1264 /* normally we would need to skip the entersub here */
931 UNLOCK; 1265 /* not doing so will re-execute it, which is exactly what we want */
932
933 /* we now skip the entersub that lead to transfer() */
934 PL_op = PL_op->op_next; 1266 /* PL_nop = PL_nop->op_next */
935 1267
936 /* inject a fake subroutine call to cctx_init */ 1268 /* inject a fake subroutine call to cctx_init */
937 cctx_prepare (aTHX_ (coro_cctx *)arg); 1269 cctx_prepare (aTHX);
938 1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
939 /* 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 */
940 PL_restartop = PL_op; 1275 PL_restartop = PL_op;
941 perl_run (PL_curinterp); 1276 perl_run (PL_curinterp);
942
943 /* 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 /*
944 * 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
945 * 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)
946 * 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
947 * bootstrap-time "top" top_env, as we cannot restore the "main" 1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
948 * 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.
949 */ 1291 */
950 PL_top_env = main_top_env; 1292 PL_top_env = main_top_env;
951 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 }
952} 1295}
953 1296
954static coro_cctx * 1297static coro_cctx *
955cctx_new () 1298cctx_new ()
956{ 1299{
957 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 ();
958 void *stack_start; 1329 void *stack_start;
959 size_t stack_size; 1330 size_t stack_size;
960 1331
961 ++cctx_count;
962
963 Newz (0, cctx, 1, coro_cctx);
964
965#if HAVE_MMAP 1332#if HAVE_MMAP
966 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;
967 /* mmap supposedly does allocate-on-write for us */ 1334 /* mmap supposedly does allocate-on-write for us */
968 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);
969 1336
970 if (cctx->sptr != (void *)-1) 1337 if (cctx->sptr != (void *)-1)
971 { 1338 {
972# if CORO_STACKGUARD 1339 #if CORO_STACKGUARD
973 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
974# endif 1341 #endif
975 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
976 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
977 cctx->flags |= CC_MAPPED; 1344 cctx->flags |= CC_MAPPED;
978 } 1345 }
979 else 1346 else
980#endif 1347#endif
981 { 1348 {
982 cctx->ssize = coro_stacksize * (long)sizeof (long); 1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
983 New (0, cctx->sptr, coro_stacksize, long); 1350 New (0, cctx->sptr, cctx_stacksize, long);
984 1351
985 if (!cctx->sptr) 1352 if (!cctx->sptr)
986 { 1353 {
987 perror ("FATAL: unable to allocate stack for coroutine"); 1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
988 _exit (EXIT_FAILURE); 1355 _exit (EXIT_FAILURE);
989 } 1356 }
990 1357
991 stack_start = cctx->sptr; 1358 stack_start = cctx->sptr;
992 stack_size = cctx->ssize; 1359 stack_size = cctx->ssize;
993 } 1360 }
994 1361
995 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
996 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);
997 1367
998 return cctx; 1368 return cctx;
999} 1369}
1000 1370
… …
1002cctx_destroy (coro_cctx *cctx) 1372cctx_destroy (coro_cctx *cctx)
1003{ 1373{
1004 if (!cctx) 1374 if (!cctx)
1005 return; 1375 return;
1006 1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1007 --cctx_count; 1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1008 1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1009#if CORO_USE_VALGRIND 1385 #if CORO_USE_VALGRIND
1010 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
1011#endif 1393#endif
1012
1013#if HAVE_MMAP
1014 if (cctx->flags & CC_MAPPED)
1015 munmap (cctx->sptr, cctx->ssize);
1016 else
1017#endif
1018 Safefree (cctx->sptr); 1394 Safefree (cctx->sptr);
1395 }
1019 1396
1020 Safefree (cctx); 1397 Safefree (cctx);
1021} 1398}
1022 1399
1023/* wether this cctx should be destructed */ 1400/* wether this cctx should be destructed */
1024#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))
1025 1402
1026static coro_cctx * 1403static coro_cctx *
1027cctx_get (pTHX) 1404cctx_get (pTHX)
1028{ 1405{
1029 while (expect_true (cctx_first)) 1406 while (expect_true (cctx_first))
… …
1036 return cctx; 1413 return cctx;
1037 1414
1038 cctx_destroy (cctx); 1415 cctx_destroy (cctx);
1039 } 1416 }
1040 1417
1041 return cctx_new (); 1418 return cctx_new_run ();
1042} 1419}
1043 1420
1044static void 1421static void
1045cctx_put (coro_cctx *cctx) 1422cctx_put (coro_cctx *cctx)
1046{ 1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1047 /* free another cctx if overlimit */ 1426 /* free another cctx if overlimit */
1048 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1427 if (expect_false (cctx_idle >= cctx_max_idle))
1049 { 1428 {
1050 coro_cctx *first = cctx_first; 1429 coro_cctx *first = cctx_first;
1051 cctx_first = first->next; 1430 cctx_first = first->next;
1052 --cctx_idle; 1431 --cctx_idle;
1053 1432
… …
1062/** coroutine switching *****************************************************/ 1441/** coroutine switching *****************************************************/
1063 1442
1064static void 1443static void
1065transfer_check (pTHX_ struct coro *prev, struct coro *next) 1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1066{ 1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1067 if (expect_true (prev != next)) 1448 if (expect_true (prev != next))
1068 { 1449 {
1069 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1070 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,");
1071 1452
1072 if (expect_false (next->flags & CF_RUNNING))
1073 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1074
1075 if (expect_false (next->flags & CF_DESTROYED)) 1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1076 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,");
1077 1455
1078 if (
1079#if PERL_VERSION_ATLEAST (5,9,0) 1456#if !PERL_VERSION_ATLEAST (5,10,0)
1080 expect_false (PL_parser)
1081#else
1082 expect_false (PL_lex_state != LEX_NOTPARSING) 1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1083#endif 1459#endif
1084 )
1085 croak ("Coro::State::transfer called while parsing, but this is not supported");
1086 } 1460 }
1087} 1461}
1088 1462
1089/* always use the TRANSFER macro */ 1463/* always use the TRANSFER macro */
1090static void NOINLINE 1464static void NOINLINE /* noinline so we have a fixed stackframe */
1091transfer (pTHX_ struct coro *prev, struct coro *next) 1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1092{ 1466{
1093 dSTACKLEVEL; 1467 dSTACKLEVEL;
1094 1468
1095 /* sometimes transfer is only called to set idle_sp */ 1469 /* sometimes transfer is only called to set idle_sp */
1096 if (expect_false (!next)) 1470 if (expect_false (!prev))
1097 { 1471 {
1098 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1472 cctx_current->idle_sp = STACKLEVEL;
1099 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 */
1100 } 1474 }
1101 else if (expect_true (prev != next)) 1475 else if (expect_true (prev != next))
1102 { 1476 {
1103 coro_cctx *prev__cctx; 1477 coro_cctx *cctx_prev;
1104 1478
1105 if (expect_false (prev->flags & CF_NEW)) 1479 if (expect_false (prev->flags & CF_NEW))
1106 { 1480 {
1107 /* create a new empty context */ 1481 /* create a new empty/source context */
1108 Newz (0, prev->cctx, 1, coro_cctx);
1109 prev->flags &= ~CF_NEW; 1482 prev->flags &= ~CF_NEW;
1110 prev->flags |= CF_RUNNING; 1483 prev->flags |= CF_RUNNING;
1111 } 1484 }
1112 1485
1113 prev->flags &= ~CF_RUNNING; 1486 prev->flags &= ~CF_RUNNING;
1114 next->flags |= CF_RUNNING; 1487 next->flags |= CF_RUNNING;
1115 1488
1116 LOCK; 1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
1117 1491
1118 if (expect_false (next->flags & CF_NEW)) 1492 if (expect_false (next->flags & CF_NEW))
1119 { 1493 {
1120 /* need to start coroutine */ 1494 /* need to start coroutine */
1121 next->flags &= ~CF_NEW; 1495 next->flags &= ~CF_NEW;
1122 /* first get rid of the old state */
1123 save_perl (aTHX_ prev);
1124 /* setup coroutine call */ 1496 /* setup coroutine call */
1125 coro_setup (aTHX_ next); 1497 coro_setup (aTHX_ next);
1126 } 1498 }
1127 else 1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
1128 { 1508 {
1129 /* coroutine already started */ 1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1130 save_perl (aTHX_ prev); 1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1131 load_perl (aTHX_ next); 1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
1132 } 1519 }
1520 else
1521 prev->cctx = cctx_current;
1133 1522
1134 prev__cctx = prev->cctx; 1523 ++next->usecount;
1135 1524
1136 /* possibly "free" the cctx */ 1525 cctx_prev = cctx_current;
1137 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
1138 { 1531 {
1139 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1532 cctx_prev->top_env = PL_top_env;
1140 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1533 PL_top_env = cctx_current->top_env;
1141 1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1142 prev->cctx = 0;
1143
1144 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1145 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1146 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1147 if (!next->cctx)
1148 next->cctx = cctx_get (aTHX);
1149
1150 cctx_put (prev__cctx);
1151 } 1535 }
1152 1536
1153 ++next->usecount; 1537 transfer_tail (aTHX);
1154
1155 if (expect_true (!next->cctx))
1156 next->cctx = cctx_get (aTHX);
1157
1158 if (expect_false (prev__cctx != next->cctx))
1159 {
1160 prev__cctx->top_env = PL_top_env;
1161 PL_top_env = next->cctx->top_env;
1162 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1163 }
1164
1165 free_coro_mortal (aTHX);
1166 UNLOCK;
1167
1168 if (expect_false (prev->throw || next->throw))
1169 {
1170 struct coro *coro = SvSTATE (coro_current);
1171
1172 if (coro->throw)
1173 {
1174 SV *exception = coro->throw;
1175 coro->throw = 0;
1176 sv_setsv (ERRSV, exception);
1177 croak (0);
1178 }
1179 }
1180 } 1538 }
1181} 1539}
1182 1540
1183struct transfer_args
1184{
1185 struct coro *prev, *next;
1186};
1187
1188#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1189#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1190 1543
1191/** high level stuff ********************************************************/ 1544/** high level stuff ********************************************************/
1192 1545
1193static int 1546static int
1194coro_state_destroy (pTHX_ struct coro *coro) 1547coro_state_destroy (pTHX_ struct coro *coro)
1195{ 1548{
1196 if (coro->flags & CF_DESTROYED) 1549 if (coro->flags & CF_DESTROYED)
1197 return 0; 1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1198 1554
1199 coro->flags |= CF_DESTROYED; 1555 coro->flags |= CF_DESTROYED;
1200 1556
1201 if (coro->flags & CF_READY) 1557 if (coro->flags & CF_READY)
1202 { 1558 {
1203 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1204 /* alternative: look through all ready queues and remove the coro */ 1560 /* alternative: look through all ready queues and remove the coro */
1205 LOCK;
1206 --coro_nready; 1561 --coro_nready;
1207 UNLOCK;
1208 } 1562 }
1209 else 1563 else
1210 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 */
1211 1565
1212 if (coro->mainstack && coro->mainstack != main_mainstack) 1566 if (coro->mainstack
1213 { 1567 && coro->mainstack != main_mainstack
1214 struct coro temp; 1568 && coro->slot
1215 1569 && !PL_dirty)
1216 if (coro->flags & CF_RUNNING)
1217 croak ("FATAL: tried to destroy currently running coroutine");
1218
1219 save_perl (aTHX_ &temp);
1220 load_perl (aTHX_ coro);
1221
1222 coro_destroy (aTHX_ coro); 1570 coro_destruct_perl (aTHX_ coro);
1223
1224 load_perl (aTHX_ &temp);
1225
1226 coro->slot = 0;
1227 }
1228 1571
1229 cctx_destroy (coro->cctx); 1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1230 SvREFCNT_dec (coro->args); 1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1231 1576
1232 if (coro->next) coro->next->prev = coro->prev; 1577 if (coro->next) coro->next->prev = coro->prev;
1233 if (coro->prev) coro->prev->next = coro->next; 1578 if (coro->prev) coro->prev->next = coro->next;
1234 if (coro == coro_first) coro_first = coro->next; 1579 if (coro == coro_first) coro_first = coro->next;
1235 1580
… …
1273# define MGf_DUP 0 1618# define MGf_DUP 0
1274#endif 1619#endif
1275}; 1620};
1276 1621
1277static void 1622static void
1278prepare_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)
1279{ 1624{
1280 ta->prev = SvSTATE (prev_sv); 1625 ta->prev = SvSTATE (prev_sv);
1281 ta->next = SvSTATE (next_sv); 1626 ta->next = SvSTATE (next_sv);
1282 TRANSFER_CHECK (*ta); 1627 TRANSFER_CHECK (*ta);
1283} 1628}
1284 1629
1285static void 1630static void
1286api_transfer (SV *prev_sv, SV *next_sv) 1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1632{
1633 struct coro_transfer_args ta;
1634
1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
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 *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
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 }
1669
1670 return 0;
1671}
1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1287{ 1675{
1288 dTHX; 1676 dTHX;
1289 struct transfer_args ta; 1677 dSP;
1290 1678
1291 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1679 ENTER;
1292 TRANSFER (ta); 1680 SAVETMPS;
1293}
1294 1681
1295/** Coro ********************************************************************/ 1682 PUSHMARK (SP);
1683 PUTBACK;
1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1296 1685
1297static void 1686 FREETMPS;
1298coro_enq (pTHX_ SV *coro_sv) 1687 LEAVE;
1299{
1300 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1301}
1302
1303static SV *
1304coro_deq (pTHX_ int min_prio)
1305{
1306 int prio = PRIO_MAX - PRIO_MIN;
1307
1308 min_prio -= PRIO_MIN;
1309 if (min_prio < 0)
1310 min_prio = 0;
1311
1312 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1313 if (AvFILLp (coro_ready [prio]) >= 0)
1314 return av_shift (coro_ready [prio]);
1315
1316 return 0;
1317} 1688}
1318 1689
1319static int 1690static int
1320api_ready (SV *coro_sv) 1691api_ready (pTHX_ SV *coro_sv)
1321{ 1692{
1322 dTHX;
1323 struct coro *coro;
1324
1325 if (SvROK (coro_sv))
1326 coro_sv = SvRV (coro_sv);
1327
1328 coro = SvSTATE (coro_sv); 1693 struct coro *coro = SvSTATE (coro_sv);
1329 1694
1330 if (coro->flags & CF_READY) 1695 if (coro->flags & CF_READY)
1331 return 0; 1696 return 0;
1332 1697
1333 coro->flags |= CF_READY; 1698 coro->flags |= CF_READY;
1334 1699
1335 LOCK; 1700 coro_enq (aTHX_ coro);
1336 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1701
1337 ++coro_nready; 1702 if (!coro_nready++)
1338 UNLOCK; 1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
1339 1705
1340 return 1; 1706 return 1;
1341} 1707}
1342 1708
1343static int 1709static int
1344api_is_ready (SV *coro_sv) 1710api_is_ready (pTHX_ SV *coro_sv)
1345{ 1711{
1346 dTHX;
1347 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1348} 1713}
1349 1714
1350static void 1715/* expects to own a reference to next->hv */
1716INLINE void
1351prepare_schedule (pTHX_ struct transfer_args *ta) 1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1352{ 1718{
1353 SV *prev_sv, *next_sv;
1354
1355 for (;;)
1356 {
1357 LOCK;
1358 next_sv = coro_deq (aTHX_ PRIO_MIN);
1359
1360 /* nothing to schedule: call the idle handler */
1361 if (expect_false (!next_sv))
1362 {
1363 dSP;
1364 UNLOCK;
1365
1366 ENTER;
1367 SAVETMPS;
1368
1369 PUSHMARK (SP);
1370 PUTBACK;
1371 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1372
1373 FREETMPS;
1374 LEAVE;
1375 continue;
1376 }
1377
1378 ta->next = SvSTATE (next_sv);
1379
1380 /* cannot transfer to destroyed coros, skip and look for next */
1381 if (expect_false (ta->next->flags & CF_DESTROYED))
1382 {
1383 UNLOCK;
1384 SvREFCNT_dec (next_sv);
1385 /* coro_nready is already taken care of by destroy */
1386 continue;
1387 }
1388
1389 --coro_nready;
1390 UNLOCK;
1391 break;
1392 }
1393
1394 /* free this only after the transfer */
1395 prev_sv = SvRV (coro_current); 1719 SV *prev_sv = SvRV (coro_current);
1720
1396 ta->prev = SvSTATE (prev_sv); 1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1397 TRANSFER_CHECK (*ta); 1724 TRANSFER_CHECK (*ta);
1398 assert (ta->next->flags & CF_READY); 1725
1399 ta->next->flags &= ~CF_READY;
1400 SvRV_set (coro_current, next_sv); 1726 SvRV_set (coro_current, (SV *)next->hv);
1401 1727
1402 LOCK;
1403 free_coro_mortal (aTHX); 1728 free_coro_mortal (aTHX);
1404 coro_mortal = prev_sv; 1729 coro_mortal = prev_sv;
1405 UNLOCK;
1406} 1730}
1407 1731
1408static 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 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
1778 }
1779 }
1780}
1781
1782INLINE void
1409prepare_cede (pTHX_ struct transfer_args *ta) 1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
1410{ 1784{
1411 api_ready (coro_current); 1785 api_ready (aTHX_ coro_current);
1412 prepare_schedule (aTHX_ ta); 1786 prepare_schedule (aTHX_ ta);
1413} 1787}
1414 1788
1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
1793
1794 if (coro_nready)
1795 {
1796 prepare_schedule (aTHX_ ta);
1797 api_ready (aTHX_ prev);
1798 }
1799 else
1800 prepare_nop (aTHX_ ta);
1801}
1802
1803static void
1804api_schedule (pTHX)
1805{
1806 struct coro_transfer_args ta;
1807
1808 prepare_schedule (aTHX_ &ta);
1809 TRANSFER (ta, 1);
1810}
1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1415static int 1822static int
1416prepare_cede_notself (pTHX_ struct transfer_args *ta) 1823api_cede (pTHX)
1417{ 1824{
1418 if (coro_nready) 1825 struct coro_transfer_args ta;
1419 { 1826
1420 SV *prev = SvRV (coro_current);
1421 prepare_schedule (aTHX_ ta); 1827 prepare_cede (aTHX_ &ta);
1422 api_ready (prev); 1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
1423 return 1; 1832 return 1;
1424 } 1833 }
1425 else 1834 else
1426 return 0; 1835 return 0;
1427} 1836}
1428 1837
1429static void
1430api_schedule (void)
1431{
1432 dTHX;
1433 struct transfer_args ta;
1434
1435 prepare_schedule (aTHX_ &ta);
1436 TRANSFER (ta);
1437}
1438
1439static int 1838static int
1440api_cede (void) 1839api_cede_notself (pTHX)
1441{ 1840{
1442 dTHX; 1841 if (coro_nready)
1842 {
1443 struct transfer_args ta; 1843 struct coro_transfer_args ta;
1444 1844
1445 prepare_cede (aTHX_ &ta); 1845 prepare_cede_notself (aTHX_ &ta);
1446
1447 if (expect_true (ta.prev != ta.next))
1448 {
1449 TRANSFER (ta); 1846 TRANSFER (ta, 1);
1450 return 1; 1847 return 1;
1451 } 1848 }
1452 else 1849 else
1453 return 0; 1850 return 0;
1454} 1851}
1455 1852
1456static int 1853static void
1457api_cede_notself (void)
1458{
1459 dTHX;
1460 struct transfer_args ta;
1461
1462 if (prepare_cede_notself (aTHX_ &ta))
1463 {
1464 TRANSFER (ta);
1465 return 1;
1466 }
1467 else
1468 return 0;
1469}
1470
1471static void
1472api_trace (SV *coro_sv, int flags) 1854api_trace (pTHX_ SV *coro_sv, int flags)
1473{ 1855{
1474 dTHX;
1475 struct coro *coro = SvSTATE (coro_sv); 1856 struct coro *coro = SvSTATE (coro_sv);
1476 1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1477 if (flags & CC_TRACE) 1861 if (flags & CC_TRACE)
1478 { 1862 {
1479 if (!coro->cctx) 1863 if (!coro->cctx)
1480 coro->cctx = cctx_new (); 1864 coro->cctx = cctx_new_run ();
1481 else if (!(coro->cctx->flags & CC_TRACE)) 1865 else if (!(coro->cctx->flags & CC_TRACE))
1482 croak ("cannot enable tracing on coroutine with custom stack"); 1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1483 1867
1484 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1485 } 1869 }
1486 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1487 { 1871 {
… …
1492 else 1876 else
1493 coro->slot->runops = RUNOPS_DEFAULT; 1877 coro->slot->runops = RUNOPS_DEFAULT;
1494 } 1878 }
1495} 1879}
1496 1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
1892 {
1893 dSP; /* don't disturb outer sp */
1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1910 }
1911 }
1912}
1913
1914static void
1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
1920
1921 /* items are actually not so common, so optimise for this case */
1922 if (items)
1923 {
1924 av_extend (av, items - 1);
1925
1926 for (i = 0; i < items; ++i)
1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
1928 }
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
1950 struct coro *coro = (struct coro *)frame->data;
1951
1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
1965 }
1966
1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)S_GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2105 SV *data = (SV *)S_GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
2111}
2112
2113static SV *
2114coro_new_rouse_cb (pTHX)
2115{
2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2120
2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2122 SvREFCNT_dec (data); /* magicext increases the refcount */
2123
2124 SvREFCNT_dec (coro->rouse_cb);
2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
2258 {
2259 /* ampersand-form of call, use @_ instead of stack */
2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2337 slf_cv = cv;
2338
2339 /* we patch the op, and then re-run the whole call */
2340 /* we have to put the same argument on the stack for this to work */
2341 /* and this will be done by pp_restore */
2342 slf_restore.op_next = (OP *)&slf_restore;
2343 slf_restore.op_type = OP_CUSTOM;
2344 slf_restore.op_ppaddr = pp_restore;
2345 slf_restore.op_first = PL_op;
2346
2347 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2348
2349 if (PL_op->op_flags & OPf_STACKED)
2350 {
2351 if (items > slf_arga)
2352 {
2353 slf_arga = items;
2354 free (slf_argv);
2355 slf_argv = malloc (slf_arga * sizeof (SV *));
2356 }
2357
2358 slf_argc = items;
2359
2360 for (i = 0; i < items; ++i)
2361 slf_argv [i] = SvREFCNT_inc (arg [i]);
2362 }
2363 else
2364 slf_argc = 0;
2365
2366 PL_op->op_ppaddr = pp_slf;
2367 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2368
2369 PL_op = (OP *)&slf_restore;
2370}
2371
2372/*****************************************************************************/
2373/* dynamic wind */
2374
2375static void
2376on_enterleave_call (pTHX_ SV *cb)
2377{
2378 dSP;
2379
2380 PUSHSTACK;
2381
2382 PUSHMARK (SP);
2383 PUTBACK;
2384 call_sv (cb, G_VOID | G_DISCARD);
2385 SPAGAIN;
2386
2387 POPSTACK;
2388}
2389
2390static SV *
2391coro_avp_pop_and_free (pTHX_ AV **avp)
2392{
2393 AV *av = *avp;
2394 SV *res = av_pop (av);
2395
2396 if (AvFILLp (av) < 0)
2397 {
2398 *avp = 0;
2399 SvREFCNT_dec (av);
2400 }
2401
2402 return res;
2403}
2404
2405static void
2406coro_pop_on_enter (pTHX_ void *coro)
2407{
2408 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2409 SvREFCNT_dec (cb);
2410}
2411
2412static void
2413coro_pop_on_leave (pTHX_ void *coro)
2414{
2415 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2416 on_enterleave_call (aTHX_ sv_2mortal (cb));
2417}
2418
2419/*****************************************************************************/
2420/* PerlIO::cede */
2421
2422typedef struct
2423{
2424 PerlIOBuf base;
2425 NV next, every;
2426} PerlIOCede;
2427
2428static IV
2429PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432
2433 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2434 self->next = nvtime () + self->every;
2435
2436 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2437}
2438
2439static SV *
2440PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2441{
2442 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2443
2444 return newSVnv (self->every);
2445}
2446
2447static IV
2448PerlIOCede_flush (pTHX_ PerlIO *f)
2449{
2450 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2451 double now = nvtime ();
2452
2453 if (now >= self->next)
2454 {
2455 api_cede (aTHX);
2456 self->next = now + self->every;
2457 }
2458
2459 return PerlIOBuf_flush (aTHX_ f);
2460}
2461
2462static PerlIO_funcs PerlIO_cede =
2463{
2464 sizeof(PerlIO_funcs),
2465 "cede",
2466 sizeof(PerlIOCede),
2467 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2468 PerlIOCede_pushed,
2469 PerlIOBuf_popped,
2470 PerlIOBuf_open,
2471 PerlIOBase_binmode,
2472 PerlIOCede_getarg,
2473 PerlIOBase_fileno,
2474 PerlIOBuf_dup,
2475 PerlIOBuf_read,
2476 PerlIOBuf_unread,
2477 PerlIOBuf_write,
2478 PerlIOBuf_seek,
2479 PerlIOBuf_tell,
2480 PerlIOBuf_close,
2481 PerlIOCede_flush,
2482 PerlIOBuf_fill,
2483 PerlIOBase_eof,
2484 PerlIOBase_error,
2485 PerlIOBase_clearerr,
2486 PerlIOBase_setlinebuf,
2487 PerlIOBuf_get_base,
2488 PerlIOBuf_bufsiz,
2489 PerlIOBuf_get_ptr,
2490 PerlIOBuf_get_cnt,
2491 PerlIOBuf_set_ptrcnt,
2492};
2493
2494/*****************************************************************************/
2495/* Coro::Semaphore & Coro::Signal */
2496
2497static SV *
2498coro_waitarray_new (pTHX_ int count)
2499{
2500 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2501 AV *av = newAV ();
2502 SV **ary;
2503
2504 /* unfortunately, building manually saves memory */
2505 Newx (ary, 2, SV *);
2506 AvALLOC (av) = ary;
2507#if PERL_VERSION_ATLEAST (5,10,0)
2508 AvARRAY (av) = ary;
2509#else
2510 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2511 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2512 SvPVX ((SV *)av) = (char *)ary;
2513#endif
2514 AvMAX (av) = 1;
2515 AvFILLp (av) = 0;
2516 ary [0] = newSViv (count);
2517
2518 return newRV_noinc ((SV *)av);
2519}
2520
2521/* semaphore */
2522
2523static void
2524coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2525{
2526 SV *count_sv = AvARRAY (av)[0];
2527 IV count = SvIVX (count_sv);
2528
2529 count += adjust;
2530 SvIVX (count_sv) = count;
2531
2532 /* now wake up as many waiters as are expected to lock */
2533 while (count > 0 && AvFILLp (av) > 0)
2534 {
2535 SV *cb;
2536
2537 /* swap first two elements so we can shift a waiter */
2538 AvARRAY (av)[0] = AvARRAY (av)[1];
2539 AvARRAY (av)[1] = count_sv;
2540 cb = av_shift (av);
2541
2542 if (SvOBJECT (cb))
2543 {
2544 api_ready (aTHX_ cb);
2545 --count;
2546 }
2547 else if (SvTYPE (cb) == SVt_PVCV)
2548 {
2549 dSP;
2550 PUSHMARK (SP);
2551 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2554 }
2555
2556 SvREFCNT_dec (cb);
2557 }
2558}
2559
2560static void
2561coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2562{
2563 /* call $sem->adjust (0) to possibly wake up some other waiters */
2564 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2565}
2566
2567static int
2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2569{
2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
2572
2573 /* if we are about to throw, don't actually acquire the lock, just throw */
2574 if (CORO_THROW)
2575 return 0;
2576 else if (SvIVX (count_sv) > 0)
2577 {
2578 SvSTATE_current->on_destroy = 0;
2579
2580 if (acquire)
2581 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2582 else
2583 coro_semaphore_adjust (aTHX_ av, 0);
2584
2585 return 0;
2586 }
2587 else
2588 {
2589 int i;
2590 /* if we were woken up but can't down, we look through the whole */
2591 /* waiters list and only add us if we aren't in there already */
2592 /* this avoids some degenerate memory usage cases */
2593
2594 for (i = 1; i <= AvFILLp (av); ++i)
2595 if (AvARRAY (av)[i] == SvRV (coro_current))
2596 return 1;
2597
2598 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2599 return 1;
2600 }
2601}
2602
2603static int
2604slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2607}
2608
2609static int
2610slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2611{
2612 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2613}
2614
2615static void
2616slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2617{
2618 AV *av = (AV *)SvRV (arg [0]);
2619
2620 if (SvIVX (AvARRAY (av)[0]) > 0)
2621 {
2622 frame->data = (void *)av;
2623 frame->prepare = prepare_nop;
2624 }
2625 else
2626 {
2627 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2628
2629 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2630 frame->prepare = prepare_schedule;
2631
2632 /* to avoid race conditions when a woken-up coro gets terminated */
2633 /* we arrange for a temporary on_destroy that calls adjust (0) */
2634 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2635 }
2636}
2637
2638static void
2639slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2642 frame->check = slf_check_semaphore_down;
2643}
2644
2645static void
2646slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (items >= 2)
2649 {
2650 /* callback form */
2651 AV *av = (AV *)SvRV (arg [0]);
2652 SV *cb_cv = s_get_cv_croak (arg [1]);
2653
2654 av_push (av, SvREFCNT_inc_NN (cb_cv));
2655
2656 if (SvIVX (AvARRAY (av)[0]) > 0)
2657 coro_semaphore_adjust (aTHX_ av, 0);
2658
2659 frame->prepare = prepare_nop;
2660 frame->check = slf_check_nop;
2661 }
2662 else
2663 {
2664 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2665 frame->check = slf_check_semaphore_wait;
2666 }
2667}
2668
2669/* signal */
2670
2671static void
2672coro_signal_wake (pTHX_ AV *av, int count)
2673{
2674 SvIVX (AvARRAY (av)[0]) = 0;
2675
2676 /* now signal count waiters */
2677 while (count > 0 && AvFILLp (av) > 0)
2678 {
2679 SV *cb;
2680
2681 /* swap first two elements so we can shift a waiter */
2682 cb = AvARRAY (av)[0];
2683 AvARRAY (av)[0] = AvARRAY (av)[1];
2684 AvARRAY (av)[1] = cb;
2685
2686 cb = av_shift (av);
2687
2688 if (SvTYPE (cb) == SVt_PVCV)
2689 {
2690 dSP;
2691 PUSHMARK (SP);
2692 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2693 PUTBACK;
2694 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2695 }
2696 else
2697 {
2698 api_ready (aTHX_ cb);
2699 sv_setiv (cb, 0); /* signal waiter */
2700 }
2701
2702 SvREFCNT_dec (cb);
2703
2704 --count;
2705 }
2706}
2707
2708static int
2709slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2710{
2711 /* if we are about to throw, also stop waiting */
2712 return SvROK ((SV *)frame->data) && !CORO_THROW;
2713}
2714
2715static void
2716slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 AV *av = (AV *)SvRV (arg [0]);
2719
2720 if (items >= 2)
2721 {
2722 SV *cb_cv = s_get_cv_croak (arg [1]);
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]))
2726 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else if (SvIVX (AvARRAY (av)[0]))
2732 {
2733 SvIVX (AvARRAY (av)[0]) = 0;
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2740
2741 av_push (av, waiter);
2742
2743 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2744 frame->prepare = prepare_schedule;
2745 frame->check = slf_check_signal_wait;
2746 }
2747}
2748
2749/*****************************************************************************/
2750/* Coro::AIO */
2751
2752#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2753
2754/* helper storage struct */
2755struct io_state
2756{
2757 int errorno;
2758 I32 laststype; /* U16 in 5.10.0 */
2759 int laststatval;
2760 Stat_t statcache;
2761};
2762
2763static void
2764coro_aio_callback (pTHX_ CV *cv)
2765{
2766 dXSARGS;
2767 AV *state = (AV *)S_GENSUB_ARG;
2768 SV *coro = av_pop (state);
2769 SV *data_sv = newSV (sizeof (struct io_state));
2770
2771 av_extend (state, items - 1);
2772
2773 sv_upgrade (data_sv, SVt_PV);
2774 SvCUR_set (data_sv, sizeof (struct io_state));
2775 SvPOK_only (data_sv);
2776
2777 {
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 data->errorno = errno;
2781 data->laststype = PL_laststype;
2782 data->laststatval = PL_laststatval;
2783 data->statcache = PL_statcache;
2784 }
2785
2786 /* now build the result vector out of all the parameters and the data_sv */
2787 {
2788 int i;
2789
2790 for (i = 0; i < items; ++i)
2791 av_push (state, SvREFCNT_inc_NN (ST (i)));
2792 }
2793
2794 av_push (state, data_sv);
2795
2796 api_ready (aTHX_ coro);
2797 SvREFCNT_dec (coro);
2798 SvREFCNT_dec ((AV *)state);
2799}
2800
2801static int
2802slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2803{
2804 AV *state = (AV *)frame->data;
2805
2806 /* if we are about to throw, return early */
2807 /* this does not cancel the aio request, but at least */
2808 /* it quickly returns */
2809 if (CORO_THROW)
2810 return 0;
2811
2812 /* one element that is an RV? repeat! */
2813 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2814 return 1;
2815
2816 /* restore status */
2817 {
2818 SV *data_sv = av_pop (state);
2819 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2820
2821 errno = data->errorno;
2822 PL_laststype = data->laststype;
2823 PL_laststatval = data->laststatval;
2824 PL_statcache = data->statcache;
2825
2826 SvREFCNT_dec (data_sv);
2827 }
2828
2829 /* push result values */
2830 {
2831 dSP;
2832 int i;
2833
2834 EXTEND (SP, AvFILLp (state) + 1);
2835 for (i = 0; i <= AvFILLp (state); ++i)
2836 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2837
2838 PUTBACK;
2839 }
2840
2841 return 0;
2842}
2843
2844static void
2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2846{
2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2848 SV *coro_hv = SvRV (coro_current);
2849 struct coro *coro = SvSTATE_hv (coro_hv);
2850
2851 /* put our coroutine id on the state arg */
2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
2853
2854 /* first see whether we have a non-zero priority and set it as AIO prio */
2855 if (coro->prio)
2856 {
2857 dSP;
2858
2859 static SV *prio_cv;
2860 static SV *prio_sv;
2861
2862 if (expect_false (!prio_cv))
2863 {
2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2865 prio_sv = newSViv (0);
2866 }
2867
2868 PUSHMARK (SP);
2869 sv_setiv (prio_sv, coro->prio);
2870 XPUSHs (prio_sv);
2871
2872 PUTBACK;
2873 call_sv (prio_cv, G_VOID | G_DISCARD);
2874 }
2875
2876 /* now call the original request */
2877 {
2878 dSP;
2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2880 int i;
2881
2882 PUSHMARK (SP);
2883
2884 /* first push all args to the stack */
2885 EXTEND (SP, items + 1);
2886
2887 for (i = 0; i < items; ++i)
2888 PUSHs (arg [i]);
2889
2890 /* now push the callback closure */
2891 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2892
2893 /* now call the AIO function - we assume our request is uncancelable */
2894 PUTBACK;
2895 call_sv ((SV *)req, G_VOID | G_DISCARD);
2896 }
2897
2898 /* now that the requets is going, we loop toll we have a result */
2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
2902}
2903
2904static void
2905coro_aio_req_xs (pTHX_ CV *cv)
2906{
2907 dXSARGS;
2908
2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2910
2911 XSRETURN_EMPTY;
2912}
2913
2914/*****************************************************************************/
2915
2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
2919
2920/*****************************************************************************/
2921
2922static SV *
2923coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2924{
2925 SV *coro_sv;
2926 struct coro *coro;
2927 MAGIC *mg;
2928 HV *hv;
2929 SV *cb;
2930 int i;
2931
2932 if (argc > 0)
2933 {
2934 cb = s_get_cv_croak (argv [0]);
2935
2936 if (!is_coro)
2937 {
2938 if (CvISXSUB (cb))
2939 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2940
2941 if (!CvROOT (cb))
2942 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2943 }
2944 }
2945
2946 Newz (0, coro, 1, struct coro);
2947 coro->args = newAV ();
2948 coro->flags = CF_NEW;
2949
2950 if (coro_first) coro_first->prev = coro;
2951 coro->next = coro_first;
2952 coro_first = coro;
2953
2954 coro->hv = hv = newHV ();
2955 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2956 mg->mg_flags |= MGf_DUP;
2957 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2958
2959 if (argc > 0)
2960 {
2961 av_extend (coro->args, argc + is_coro - 1);
2962
2963 if (is_coro)
2964 {
2965 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2966 cb = (SV *)cv_coro_run;
2967 }
2968
2969 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2970
2971 for (i = 1; i < argc; i++)
2972 av_push (coro->args, newSVsv (argv [i]));
2973 }
2974
2975 return coro_sv;
2976}
2977
1497MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2978MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1498 2979
1499PROTOTYPES: DISABLE 2980PROTOTYPES: DISABLE
1500 2981
1501BOOT: 2982BOOT:
1502{ 2983{
1503#ifdef USE_ITHREADS 2984#ifdef USE_ITHREADS
1504 MUTEX_INIT (&coro_mutex); 2985# if CORO_PTHREAD
2986 coro_thx = PERL_GET_CONTEXT;
2987# endif
1505#endif 2988#endif
1506 BOOT_PAGESIZE; 2989 BOOT_PAGESIZE;
1507 2990
2991 cctx_current = cctx_new_empty ();
2992
1508 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2993 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1509 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2994 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1510 2995
2996 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2997 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2998 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2999
1511 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 3000 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1512 sv_diehook = coro_get_sv (aTHX_ "Coro::State::DIEHOOK" , TRUE); 3001 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1513 sv_warnhook = coro_get_sv (aTHX_ "Coro::State::WARNHOOK", TRUE); 3002 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1514
1515 if (!PL_diehook ) hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
1516 if (!PL_warnhook) hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
1517 3003
1518 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3004 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1519 3005
1520 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3006 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1521 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3007 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1526 main_top_env = PL_top_env; 3012 main_top_env = PL_top_env;
1527 3013
1528 while (main_top_env->je_prev) 3014 while (main_top_env->je_prev)
1529 main_top_env = main_top_env->je_prev; 3015 main_top_env = main_top_env->je_prev;
1530 3016
3017 {
3018 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3019
3020 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3021 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3022
3023 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3024 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3025 }
3026
1531 coroapi.ver = CORO_API_VERSION; 3027 coroapi.ver = CORO_API_VERSION;
1532 coroapi.rev = CORO_API_REVISION; 3028 coroapi.rev = CORO_API_REVISION;
3029
1533 coroapi.transfer = api_transfer; 3030 coroapi.transfer = api_transfer;
1534 3031
3032 coroapi.sv_state = SvSTATE_;
3033 coroapi.execute_slf = api_execute_slf;
3034 coroapi.prepare_nop = prepare_nop;
3035 coroapi.prepare_schedule = prepare_schedule;
3036 coroapi.prepare_cede = prepare_cede;
3037 coroapi.prepare_cede_notself = prepare_cede_notself;
3038
3039 {
3040 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3041
3042 if (!svp) croak ("Time::HiRes is required");
3043 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3044
3045 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3046
3047 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3048 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3049 }
3050
1535 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3051 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1536} 3052}
1537 3053
1538SV * 3054SV *
1539new (char *klass, ...) 3055new (SV *klass, ...)
3056 ALIAS:
3057 Coro::new = 1
1540 CODE: 3058 CODE:
1541{ 3059 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1542 struct coro *coro; 3060 OUTPUT:
1543 HV *hv;
1544 int i;
1545
1546 Newz (0, coro, 1, struct coro);
1547 coro->args = newAV ();
1548 coro->flags = CF_NEW;
1549
1550 if (coro_first) coro_first->prev = coro;
1551 coro->next = coro_first;
1552 coro_first = coro;
1553
1554 coro->hv = hv = newHV ();
1555 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1556 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1557
1558 av_extend (coro->args, items - 1);
1559 for (i = 1; i < items; i++)
1560 av_push (coro->args, newSVsv (ST (i)));
1561}
1562 OUTPUT:
1563 RETVAL 3061 RETVAL
1564 3062
1565# these not obviously related functions are all rolled into the same xs
1566# function to increase chances that they all will call transfer with the same
1567# stack offset
1568void 3063void
1569_set_stacklevel (...) 3064transfer (...)
1570 ALIAS: 3065 PROTOTYPE: $$
1571 Coro::State::transfer = 1 3066 CODE:
1572 Coro::schedule = 2 3067 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1573 Coro::cede = 3
1574 Coro::cede_notself = 4
1575 CODE:
1576{
1577 struct transfer_args ta;
1578
1579 switch (ix)
1580 {
1581 case 0:
1582 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1583 ta.next = 0;
1584 break;
1585
1586 case 1:
1587 if (items != 2)
1588 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1589
1590 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1591 break;
1592
1593 case 2:
1594 prepare_schedule (aTHX_ &ta);
1595 break;
1596
1597 case 3:
1598 prepare_cede (aTHX_ &ta);
1599 break;
1600
1601 case 4:
1602 if (!prepare_cede_notself (aTHX_ &ta))
1603 XSRETURN_EMPTY;
1604
1605 break;
1606 }
1607
1608 BARRIER;
1609 PUTBACK;
1610 TRANSFER (ta);
1611 SPAGAIN; /* might be the sp of a different coroutine now */
1612 /* be extra careful not to ever do anything after TRANSFER */
1613}
1614 3068
1615bool 3069bool
1616_destroy (SV *coro_sv) 3070_destroy (SV *coro_sv)
1617 CODE: 3071 CODE:
1618 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3072 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1619 OUTPUT: 3073 OUTPUT:
1620 RETVAL 3074 RETVAL
1621 3075
1622void 3076void
1623_exit (code) 3077_exit (int code)
1624 int code
1625 PROTOTYPE: $ 3078 PROTOTYPE: $
1626 CODE: 3079 CODE:
1627 _exit (code); 3080 _exit (code);
1628 3081
3082SV *
3083clone (Coro::State coro)
3084 CODE:
3085{
3086#if CORO_CLONE
3087 struct coro *ncoro = coro_clone (aTHX_ coro);
3088 MAGIC *mg;
3089 /* TODO: too much duplication */
3090 ncoro->hv = newHV ();
3091 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3092 mg->mg_flags |= MGf_DUP;
3093 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3094#else
3095 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3096#endif
3097}
3098 OUTPUT:
3099 RETVAL
3100
1629int 3101int
1630cctx_stacksize (int new_stacksize = 0) 3102cctx_stacksize (int new_stacksize = 0)
3103 PROTOTYPE: ;$
1631 CODE: 3104 CODE:
1632 RETVAL = coro_stacksize; 3105 RETVAL = cctx_stacksize;
1633 if (new_stacksize) 3106 if (new_stacksize)
3107 {
1634 coro_stacksize = new_stacksize; 3108 cctx_stacksize = new_stacksize;
3109 ++cctx_gen;
3110 }
1635 OUTPUT: 3111 OUTPUT:
1636 RETVAL 3112 RETVAL
1637 3113
1638int 3114int
3115cctx_max_idle (int max_idle = 0)
3116 PROTOTYPE: ;$
3117 CODE:
3118 RETVAL = cctx_max_idle;
3119 if (max_idle > 1)
3120 cctx_max_idle = max_idle;
3121 OUTPUT:
3122 RETVAL
3123
3124int
1639cctx_count () 3125cctx_count ()
3126 PROTOTYPE:
1640 CODE: 3127 CODE:
1641 RETVAL = cctx_count; 3128 RETVAL = cctx_count;
1642 OUTPUT: 3129 OUTPUT:
1643 RETVAL 3130 RETVAL
1644 3131
1645int 3132int
1646cctx_idle () 3133cctx_idle ()
3134 PROTOTYPE:
1647 CODE: 3135 CODE:
1648 RETVAL = cctx_idle; 3136 RETVAL = cctx_idle;
1649 OUTPUT: 3137 OUTPUT:
1650 RETVAL 3138 RETVAL
1651 3139
1652void 3140void
1653list () 3141list ()
3142 PROTOTYPE:
1654 PPCODE: 3143 PPCODE:
1655{ 3144{
1656 struct coro *coro; 3145 struct coro *coro;
1657 for (coro = coro_first; coro; coro = coro->next) 3146 for (coro = coro_first; coro; coro = coro->next)
1658 if (coro->hv) 3147 if (coro->hv)
… …
1663call (Coro::State coro, SV *coderef) 3152call (Coro::State coro, SV *coderef)
1664 ALIAS: 3153 ALIAS:
1665 eval = 1 3154 eval = 1
1666 CODE: 3155 CODE:
1667{ 3156{
1668 if (coro->mainstack) 3157 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1669 { 3158 {
1670 struct coro temp; 3159 struct coro *current = SvSTATE_current;
1671 3160
1672 if (!(coro->flags & CF_RUNNING)) 3161 if (current != coro)
1673 { 3162 {
3163 PUTBACK;
1674 save_perl (aTHX_ &temp); 3164 save_perl (aTHX_ current);
1675 load_perl (aTHX_ coro); 3165 load_perl (aTHX_ coro);
3166 SPAGAIN;
1676 } 3167 }
1677 3168
1678 {
1679 dSP;
1680 ENTER;
1681 SAVETMPS;
1682 PUTBACK;
1683 PUSHSTACK; 3169 PUSHSTACK;
3170
1684 PUSHMARK (SP); 3171 PUSHMARK (SP);
3172 PUTBACK;
1685 3173
1686 if (ix) 3174 if (ix)
1687 eval_sv (coderef, 0); 3175 eval_sv (coderef, 0);
1688 else 3176 else
1689 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3177 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1690 3178
1691 POPSTACK; 3179 POPSTACK;
1692 SPAGAIN; 3180 SPAGAIN;
1693 FREETMPS;
1694 LEAVE;
1695 PUTBACK;
1696 }
1697 3181
1698 if (!(coro->flags & CF_RUNNING)) 3182 if (current != coro)
1699 { 3183 {
3184 PUTBACK;
1700 save_perl (aTHX_ coro); 3185 save_perl (aTHX_ coro);
1701 load_perl (aTHX_ &temp); 3186 load_perl (aTHX_ current);
3187 SPAGAIN;
1702 } 3188 }
1703 } 3189 }
1704} 3190}
1705 3191
1706SV * 3192SV *
… …
1709 ALIAS: 3195 ALIAS:
1710 is_ready = CF_READY 3196 is_ready = CF_READY
1711 is_running = CF_RUNNING 3197 is_running = CF_RUNNING
1712 is_new = CF_NEW 3198 is_new = CF_NEW
1713 is_destroyed = CF_DESTROYED 3199 is_destroyed = CF_DESTROYED
3200 is_suspended = CF_SUSPENDED
1714 CODE: 3201 CODE:
1715 RETVAL = boolSV (coro->flags & ix); 3202 RETVAL = boolSV (coro->flags & ix);
1716 OUTPUT: 3203 OUTPUT:
1717 RETVAL 3204 RETVAL
1718 3205
1719void 3206void
3207throw (Coro::State self, SV *throw = &PL_sv_undef)
3208 PROTOTYPE: $;$
3209 CODE:
3210{
3211 struct coro *current = SvSTATE_current;
3212 SV **throwp = self == current ? &CORO_THROW : &self->except;
3213 SvREFCNT_dec (*throwp);
3214 SvGETMAGIC (throw);
3215 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3216}
3217
3218void
1720api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3219api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3220 PROTOTYPE: $;$
3221 C_ARGS: aTHX_ coro, flags
1721 3222
1722SV * 3223SV *
1723has_stack (Coro::State coro) 3224has_cctx (Coro::State coro)
1724 PROTOTYPE: $ 3225 PROTOTYPE: $
1725 CODE: 3226 CODE:
1726 RETVAL = boolSV (!!coro->cctx); 3227 /* maybe manage the running flag differently */
3228 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1727 OUTPUT: 3229 OUTPUT:
1728 RETVAL 3230 RETVAL
1729 3231
1730int 3232int
1731is_traced (Coro::State coro) 3233is_traced (Coro::State coro)
… …
1733 CODE: 3235 CODE:
1734 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3236 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1735 OUTPUT: 3237 OUTPUT:
1736 RETVAL 3238 RETVAL
1737 3239
1738IV 3240UV
1739rss (Coro::State coro) 3241rss (Coro::State coro)
1740 PROTOTYPE: $ 3242 PROTOTYPE: $
1741 ALIAS: 3243 ALIAS:
1742 usecount = 1 3244 usecount = 1
1743 CODE: 3245 CODE:
… …
1747 case 1: RETVAL = coro->usecount; break; 3249 case 1: RETVAL = coro->usecount; break;
1748 } 3250 }
1749 OUTPUT: 3251 OUTPUT:
1750 RETVAL 3252 RETVAL
1751 3253
3254void
3255force_cctx ()
3256 PROTOTYPE:
3257 CODE:
3258 cctx_current->idle_sp = 0;
3259
3260void
3261swap_defsv (Coro::State self)
3262 PROTOTYPE: $
3263 ALIAS:
3264 swap_defav = 1
3265 CODE:
3266 if (!self->slot)
3267 croak ("cannot swap state with coroutine that has no saved state,");
3268 else
3269 {
3270 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3271 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3272
3273 SV *tmp = *src; *src = *dst; *dst = tmp;
3274 }
3275
3276void
3277cancel (Coro::State self)
3278 CODE:
3279 coro_state_destroy (aTHX_ self);
3280 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3281
3282
3283SV *
3284enable_times (int enabled = enable_times)
3285 CODE:
3286{
3287 RETVAL = boolSV (enable_times);
3288
3289 if (enabled != enable_times)
3290 {
3291 enable_times = enabled;
3292
3293 coro_times_update ();
3294 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3295 }
3296}
3297 OUTPUT:
3298 RETVAL
3299
3300void
3301times (Coro::State self)
3302 PPCODE:
3303{
3304 struct coro *current = SvSTATE (coro_current);
3305
3306 if (expect_false (current == self))
3307 {
3308 coro_times_update ();
3309 coro_times_add (SvSTATE (coro_current));
3310 }
3311
3312 EXTEND (SP, 2);
3313 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3314 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3315
3316 if (expect_false (current == self))
3317 coro_times_sub (SvSTATE (coro_current));
3318}
1752 3319
1753MODULE = Coro::State PACKAGE = Coro 3320MODULE = Coro::State PACKAGE = Coro
1754 3321
1755BOOT: 3322BOOT:
1756{ 3323{
1757 int i;
1758
1759 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3324 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1760 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3325 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3326 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3327 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3328 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1761 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3329 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3330 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3331 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3332 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1762 3333
1763 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3334 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1764 SvREADONLY_on (coro_current); 3335 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1765 3336 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3337 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3338
1766 coro_stash = gv_stashpv ("Coro", TRUE); 3339 coro_stash = gv_stashpv ("Coro", TRUE);
1767 3340
1768 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3341 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1769 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3342 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1770 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3343 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1771 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3344 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1772 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3345 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1773 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3346 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1774
1775 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1776 coro_ready[i] = newAV ();
1777 3347
1778 { 3348 {
1779 SV *sv = perl_get_sv ("Coro::API", TRUE); 3349 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1780 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1781 3350
1782 coroapi.schedule = api_schedule; 3351 coroapi.schedule = api_schedule;
3352 coroapi.schedule_to = api_schedule_to;
1783 coroapi.cede = api_cede; 3353 coroapi.cede = api_cede;
1784 coroapi.cede_notself = api_cede_notself; 3354 coroapi.cede_notself = api_cede_notself;
1785 coroapi.ready = api_ready; 3355 coroapi.ready = api_ready;
1786 coroapi.is_ready = api_is_ready; 3356 coroapi.is_ready = api_is_ready;
1787 coroapi.nready = &coro_nready; 3357 coroapi.nready = coro_nready;
1788 coroapi.current = coro_current; 3358 coroapi.current = coro_current;
1789 3359
1790 GCoroAPI = &coroapi; 3360 /*GCoroAPI = &coroapi;*/
1791 sv_setiv (sv, (IV)&coroapi); 3361 sv_setiv (sv, (IV)&coroapi);
1792 SvREADONLY_on (sv); 3362 SvREADONLY_on (sv);
1793 } 3363 }
1794} 3364}
3365
3366SV *
3367async (...)
3368 PROTOTYPE: &@
3369 CODE:
3370 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3371 api_ready (aTHX_ RETVAL);
3372 OUTPUT:
3373 RETVAL
3374
3375void
3376terminate (...)
3377 CODE:
3378 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3379
3380void
3381schedule (...)
3382 CODE:
3383 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3384
3385void
3386schedule_to (...)
3387 CODE:
3388 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3389
3390void
3391cede_to (...)
3392 CODE:
3393 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3394
3395void
3396cede (...)
3397 CODE:
3398 CORO_EXECUTE_SLF_XS (slf_init_cede);
3399
3400void
3401cede_notself (...)
3402 CODE:
3403 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1795 3404
1796void 3405void
1797_set_current (SV *current) 3406_set_current (SV *current)
1798 PROTOTYPE: $ 3407 PROTOTYPE: $
1799 CODE: 3408 CODE:
1800 SvREFCNT_dec (SvRV (coro_current)); 3409 SvREFCNT_dec (SvRV (coro_current));
1801 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3410 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3411
3412void
3413_set_readyhook (SV *hook)
3414 PROTOTYPE: $
3415 CODE:
3416 SvREFCNT_dec (coro_readyhook);
3417 SvGETMAGIC (hook);
3418 if (SvOK (hook))
3419 {
3420 coro_readyhook = newSVsv (hook);
3421 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3422 }
3423 else
3424 {
3425 coro_readyhook = 0;
3426 CORO_READYHOOK = 0;
3427 }
1802 3428
1803int 3429int
1804prio (Coro::State coro, int newprio = 0) 3430prio (Coro::State coro, int newprio = 0)
3431 PROTOTYPE: $;$
1805 ALIAS: 3432 ALIAS:
1806 nice = 1 3433 nice = 1
1807 CODE: 3434 CODE:
1808{ 3435{
1809 RETVAL = coro->prio; 3436 RETVAL = coro->prio;
… …
1811 if (items > 1) 3438 if (items > 1)
1812 { 3439 {
1813 if (ix) 3440 if (ix)
1814 newprio = coro->prio - newprio; 3441 newprio = coro->prio - newprio;
1815 3442
1816 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3443 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1817 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3444 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1818 3445
1819 coro->prio = newprio; 3446 coro->prio = newprio;
1820 } 3447 }
1821} 3448}
1822 OUTPUT: 3449 OUTPUT:
… …
1824 3451
1825SV * 3452SV *
1826ready (SV *self) 3453ready (SV *self)
1827 PROTOTYPE: $ 3454 PROTOTYPE: $
1828 CODE: 3455 CODE:
1829 RETVAL = boolSV (api_ready (self)); 3456 RETVAL = boolSV (api_ready (aTHX_ self));
1830 OUTPUT: 3457 OUTPUT:
1831 RETVAL 3458 RETVAL
1832 3459
1833int 3460int
1834nready (...) 3461nready (...)
… …
1837 RETVAL = coro_nready; 3464 RETVAL = coro_nready;
1838 OUTPUT: 3465 OUTPUT:
1839 RETVAL 3466 RETVAL
1840 3467
1841void 3468void
1842throw (Coro::State self, SV *throw = &PL_sv_undef) 3469suspend (Coro::State self)
1843 PROTOTYPE: $;$ 3470 PROTOTYPE: $
1844 CODE: 3471 CODE:
1845 SvREFCNT_dec (self->throw); 3472 self->flags |= CF_SUSPENDED;
1846 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1847 3473
1848# for async_pool speedup
1849void 3474void
1850_pool_1 (SV *cb) 3475resume (Coro::State self)
3476 PROTOTYPE: $
1851 CODE: 3477 CODE:
1852{ 3478 self->flags &= ~CF_SUSPENDED;
1853 struct coro *coro = SvSTATE (coro_current);
1854 HV *hv = (HV *)SvRV (coro_current);
1855 AV *defav = GvAV (PL_defgv);
1856 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1857 AV *invoke_av;
1858 int i, len;
1859 3479
1860 if (!invoke) 3480void
1861 croak ("\3async_pool terminate\2\n"); 3481_pool_handler (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1862 3484
1863 SvREFCNT_dec (coro->saved_deffh); 3485void
1864 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3486async_pool (SV *cv, ...)
3487 PROTOTYPE: &@
3488 PPCODE:
3489{
3490 HV *hv = (HV *)av_pop (av_async_pool);
3491 AV *av = newAV ();
3492 SV *cb = ST (0);
3493 int i;
1865 3494
1866 hv_store (hv, "desc", sizeof ("desc") - 1, 3495 av_extend (av, items - 2);
1867 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3496 for (i = 1; i < items; ++i)
3497 av_push (av, SvREFCNT_inc_NN (ST (i)));
1868 3498
1869 invoke_av = (AV *)SvRV (invoke); 3499 if ((SV *)hv == &PL_sv_undef)
1870 len = av_len (invoke_av);
1871
1872 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1873
1874 if (len > 0)
1875 { 3500 {
1876 av_fill (defav, len - 1); 3501 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1877 for (i = 0; i < len; ++i) 3502 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1878 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3503 SvREFCNT_dec (sv);
1879 } 3504 }
1880 3505
3506 {
3507 struct coro *coro = SvSTATE_hv (hv);
3508
3509 assert (!coro->invoke_cb);
3510 assert (!coro->invoke_av);
3511 coro->invoke_cb = SvREFCNT_inc (cb);
3512 coro->invoke_av = av;
3513 }
3514
3515 api_ready (aTHX_ (SV *)hv);
3516
3517 if (GIMME_V != G_VOID)
3518 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3519 else
1881 SvREFCNT_dec (invoke); 3520 SvREFCNT_dec (hv);
1882} 3521}
1883 3522
1884void 3523SV *
1885_pool_2 (SV *cb) 3524rouse_cb ()
3525 PROTOTYPE:
1886 CODE: 3526 CODE:
1887{ 3527 RETVAL = coro_new_rouse_cb (aTHX);
1888 struct coro *coro = SvSTATE (coro_current);
1889
1890 sv_setsv (cb, &PL_sv_undef);
1891
1892 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1893 coro->saved_deffh = 0;
1894
1895 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1896 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1897 croak ("\3async_pool terminate\2\n");
1898
1899 av_clear (GvAV (PL_defgv));
1900 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1901 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1902
1903 coro->prio = 0;
1904
1905 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1906 api_trace (coro_current, 0);
1907
1908 av_push (av_async_pool, newSVsv (coro_current));
1909}
1910
1911
1912MODULE = Coro::State PACKAGE = Coro::AIO
1913
1914SV *
1915_get_state ()
1916 CODE:
1917{
1918 struct io_state *data;
1919
1920 RETVAL = newSV (sizeof (struct io_state));
1921 data = (struct io_state *)SvPVX (RETVAL);
1922 SvCUR_set (RETVAL, sizeof (struct io_state));
1923 SvPOK_only (RETVAL);
1924
1925 data->errorno = errno;
1926 data->laststype = PL_laststype;
1927 data->laststatval = PL_laststatval;
1928 data->statcache = PL_statcache;
1929}
1930 OUTPUT: 3528 OUTPUT:
1931 RETVAL 3529 RETVAL
1932 3530
1933void 3531void
1934_set_state (char *data_) 3532rouse_wait (...)
3533 PROTOTYPE: ;$
3534 PPCODE:
3535 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3536
3537void
3538on_enter (SV *block)
3539 ALIAS:
3540 on_leave = 1
1935 PROTOTYPE: $ 3541 PROTOTYPE: &
1936 CODE: 3542 CODE:
1937{ 3543{
1938 struct io_state *data = (void *)data_; 3544 struct coro *coro = SvSTATE_current;
3545 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1939 3546
1940 errno = data->errorno; 3547 block = s_get_cv_croak (block);
1941 PL_laststype = data->laststype;
1942 PL_laststatval = data->laststatval;
1943 PL_statcache = data->statcache;
1944}
1945 3548
3549 if (!*avp)
3550 *avp = newAV ();
3551
3552 av_push (*avp, SvREFCNT_inc (block));
3553
3554 if (!ix)
3555 on_enterleave_call (aTHX_ block);
3556
3557 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3558 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3559 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3560}
3561
3562
3563MODULE = Coro::State PACKAGE = PerlIO::cede
3564
3565BOOT:
3566 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3567
3568
3569MODULE = Coro::State PACKAGE = Coro::Semaphore
3570
3571SV *
3572new (SV *klass, SV *count = 0)
3573 CODE:
3574{
3575 int semcnt = 1;
3576
3577 if (count)
3578 {
3579 SvGETMAGIC (count);
3580
3581 if (SvOK (count))
3582 semcnt = SvIV (count);
3583 }
3584
3585 RETVAL = sv_bless (
3586 coro_waitarray_new (aTHX_ semcnt),
3587 GvSTASH (CvGV (cv))
3588 );
3589}
3590 OUTPUT:
3591 RETVAL
3592
3593# helper for Coro::Channel and others
3594SV *
3595_alloc (int count)
3596 CODE:
3597 RETVAL = coro_waitarray_new (aTHX_ count);
3598 OUTPUT:
3599 RETVAL
3600
3601SV *
3602count (SV *self)
3603 CODE:
3604 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3605 OUTPUT:
3606 RETVAL
3607
3608void
3609up (SV *self, int adjust = 1)
3610 ALIAS:
3611 adjust = 1
3612 CODE:
3613 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3614
3615void
3616down (...)
3617 CODE:
3618 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3619
3620void
3621wait (...)
3622 CODE:
3623 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3624
3625void
3626try (SV *self)
3627 PPCODE:
3628{
3629 AV *av = (AV *)SvRV (self);
3630 SV *count_sv = AvARRAY (av)[0];
3631 IV count = SvIVX (count_sv);
3632
3633 if (count > 0)
3634 {
3635 --count;
3636 SvIVX (count_sv) = count;
3637 XSRETURN_YES;
3638 }
3639 else
3640 XSRETURN_NO;
3641}
3642
3643void
3644waiters (SV *self)
3645 PPCODE:
3646{
3647 AV *av = (AV *)SvRV (self);
3648 int wcount = AvFILLp (av) + 1 - 1;
3649
3650 if (GIMME_V == G_SCALAR)
3651 XPUSHs (sv_2mortal (newSViv (wcount)));
3652 else
3653 {
3654 int i;
3655 EXTEND (SP, wcount);
3656 for (i = 1; i <= wcount; ++i)
3657 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3658 }
3659}
3660
3661MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3662
3663void
3664_may_delete (SV *sem, int count, int extra_refs)
3665 PPCODE:
3666{
3667 AV *av = (AV *)SvRV (sem);
3668
3669 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3670 && AvFILLp (av) == 0 /* no waiters, just count */
3671 && SvIV (AvARRAY (av)[0]) == count)
3672 XSRETURN_YES;
3673
3674 XSRETURN_NO;
3675}
3676
3677MODULE = Coro::State PACKAGE = Coro::Signal
3678
3679SV *
3680new (SV *klass)
3681 CODE:
3682 RETVAL = sv_bless (
3683 coro_waitarray_new (aTHX_ 0),
3684 GvSTASH (CvGV (cv))
3685 );
3686 OUTPUT:
3687 RETVAL
3688
3689void
3690wait (...)
3691 CODE:
3692 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3693
3694void
3695broadcast (SV *self)
3696 CODE:
3697{
3698 AV *av = (AV *)SvRV (self);
3699 coro_signal_wake (aTHX_ av, AvFILLp (av));
3700}
3701
3702void
3703send (SV *self)
3704 CODE:
3705{
3706 AV *av = (AV *)SvRV (self);
3707
3708 if (AvFILLp (av))
3709 coro_signal_wake (aTHX_ av, 1);
3710 else
3711 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3712}
3713
3714IV
3715awaited (SV *self)
3716 CODE:
3717 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3718 OUTPUT:
3719 RETVAL
3720
3721
3722MODULE = Coro::State PACKAGE = Coro::AnyEvent
3723
3724BOOT:
3725 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3726
3727void
3728_schedule (...)
3729 CODE:
3730{
3731 static int incede;
3732
3733 api_cede_notself (aTHX);
3734
3735 ++incede;
3736 while (coro_nready >= incede && api_cede (aTHX))
3737 ;
3738
3739 sv_setsv (sv_activity, &PL_sv_undef);
3740 if (coro_nready >= incede)
3741 {
3742 PUSHMARK (SP);
3743 PUTBACK;
3744 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3745 }
3746
3747 --incede;
3748}
3749
3750
3751MODULE = Coro::State PACKAGE = Coro::AIO
3752
3753void
3754_register (char *target, char *proto, SV *req)
3755 CODE:
3756{
3757 SV *req_cv = s_get_cv_croak (req);
3758 /* newXSproto doesn't return the CV on 5.8 */
3759 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3760 sv_setpv ((SV *)slf_cv, proto);
3761 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3762}
3763
3764MODULE = Coro::State PACKAGE = Coro::Select
3765
3766void
3767patch_pp_sselect ()
3768 CODE:
3769 if (!coro_old_pp_sselect)
3770 {
3771 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3772 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3773 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3774 }
3775
3776void
3777unpatch_pp_sselect ()
3778 CODE:
3779 if (coro_old_pp_sselect)
3780 {
3781 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3782 coro_old_pp_sselect = 0;
3783 }
3784
3785

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