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Comparing Coro/Coro/State.xs (file contents):
Revision 1.162 by root, Sun Sep 23 21:49:58 2007 UTC vs.
Revision 1.395 by root, Fri May 6 07:22:14 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#include <stdio.h> 18#include <stdio.h>
12#include <errno.h> 19#include <errno.h>
13#include <assert.h> 20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
34#endif
14 35
15#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
16# include <unistd.h> 37# include <unistd.h>
17# include <sys/mman.h> 38# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 56# define BOOT_PAGESIZE (void)0
36#endif 57#endif
37 58
38#if CORO_USE_VALGRIND 59#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 60# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 61#endif
44 62
45/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 64static int cctx_max_idle = 4;
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79 65
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
82#endif 68#endif
83 69
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 76# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 77#endif
92 78
93/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
95#define dSTACKLEVEL volatile char stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
97 88
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
99 90
100#if __GNUC__ >= 3 91#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
103#else 95#else
104# define attribute(x) 96# define attribute(x)
105# define BARRIER 97# define expect(expr,value) (expr)
98# define INLINE static
106#endif 99#endif
107 100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
108#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
109 105
110#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
111 108
112#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 110# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 111static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 112# endif
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 113#endif
120 114
121/* helper storage struct for Coro::AIO */ 115#ifdef __linux
122struct io_state 116# include <time.h> /* for timespec */
123{ 117# include <syscall.h> /* for SYS_* */
124 int errorno; 118# ifdef SYS_clock_gettime
125 I32 laststype; 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 120# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 122# endif
123#endif
129 124
125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131
132static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 136static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
136 149
137/* async_pool helper stuff */ 150/* async_pool helper stuff */
138static SV *sv_pool_rss; 151static SV *sv_pool_rss;
139static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
157
158/* Coro::AnyEvent */
159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
141 166
142static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
144 169
170enum {
171 CC_MAPPED = 0x01,
172 CC_NOREUSE = 0x02, /* throw this away after tracing */
173 CC_TRACE = 0x04,
174 CC_TRACE_SUB = 0x08, /* trace sub calls */
175 CC_TRACE_LINE = 0x10, /* trace each statement */
176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
177};
178
145/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
146typedef struct coro_cctx { 180typedef struct coro_cctx
181{
147 struct coro_cctx *next; 182 struct coro_cctx *next;
148 183
149 /* the stack */ 184 /* the stack */
150 void *sptr; 185 void *sptr;
151 size_t ssize; 186 size_t ssize;
… …
154 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
155 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
156 JMPENV *top_env; 191 JMPENV *top_env;
157 coro_context cctx; 192 coro_context cctx;
158 193
194 U32 gen;
159#if CORO_USE_VALGRIND 195#if CORO_USE_VALGRIND
160 int valgrind_id; 196 int valgrind_id;
161#endif 197#endif
162 char inuse, mapped; 198 unsigned char flags;
163} coro_cctx; 199} coro_cctx;
200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
164 204
165enum { 205enum {
166 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
167 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
168 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
169 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
170}; 212};
171 213
172/* this is a structure representing a perl-level coroutine */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
173struct coro { 215typedef struct
174 /* the c coroutine allocated to this perl coroutine, if any */ 216{
175 coro_cctx *cctx; 217 SV *defsv;
176 218 AV *defav;
177 /* data associated with this coroutine (initial args) */ 219 SV *errsv;
178 AV *args; 220 SV *irsgv;
179 int refcnt; 221 HV *hinthv;
180 int save; /* CORO_SAVE flags */
181 int flags; /* CF_ flags */
182
183 /* optionally saved, might be zero */
184 AV *defav; /* @_ */
185 SV *defsv; /* $_ */
186 SV *errsv; /* $@ */
187 GV *deffh; /* default filehandle */
188 SV *irssv; /* $/ */
189 SV *irssv_sv; /* real $/ cache */
190
191#define VAR(name,type) type name; 222#define VAR(name,type) type name;
192# include "state.h" 223# include "state.h"
193#undef VAR 224#undef VAR
225} perl_slots;
226
227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
228
229/* this is a structure representing a perl-level coroutine */
230struct coro {
231 /* the C coroutine allocated to this perl coroutine, if any */
232 coro_cctx *cctx;
233
234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
238 struct CoroSLF slf_frame; /* saved slf frame */
239 AV *mainstack;
240 perl_slots *slot; /* basically the saved sp */
241
242 CV *startcv; /* the CV to execute */
243 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
194 251
195 /* coro process data */ 252 /* coro process data */
196 int prio; 253 int prio;
254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
256
257 /* async_pool */
258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
197 271
198 /* linked list */ 272 /* linked list */
199 struct coro *next, *prev; 273 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 274};
202 275
203typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
205 278
279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
283
206/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
207 285
208#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
209#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
210#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
211#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
212#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
213#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
214 292
215/* for Coro.pm */ 293/* for Coro.pm */
216static SV *coro_current; 294static SV *coro_current;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 295static SV *coro_readyhook;
218static int coro_nready; 296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
219static struct coro *coro_first; 298static struct coro *coro_first;
299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
220 372
221/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
222 374
375static SV *
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
223static AV * 385static AV *
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV *
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504static AV *
224coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
225{ 506{
226 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
228 509
229 newpadlist = newAV (); 510 newpadlist = newAV ();
230 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0) 512#if PERL_VERSION_ATLEAST (5,10,0)
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
233#else 514#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif 516#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist); 518 --AvFILLp (padlist);
238 519
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
240 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
241 522
242 return newpadlist; 523 return newpadlist;
243} 524}
244 525
245static void 526static void
246free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
247{ 528{
248 /* may be during global destruction */ 529 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
250 { 531 {
251 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
252 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
253 { 535 {
254 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
255 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
256 { 538 I32 j = AvFILLp (av);
257 SV *sv; 539
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
259 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
260
261 SvREFCNT_dec (*svp);
262 }
263 } 545 }
264 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
265 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
266 } 551 }
267} 552}
268 553
269static int 554static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 556{
272 AV *padlist; 557 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
274 563
275 /* casting is fun. */ 564 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
278 567
279 SvREFCNT_dec (av); 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280 569
281 return 0; 570 return 0;
282} 571}
283 572
284#define PERL_MAGIC_coro PERL_MAGIC_ext 573static MGVTBL coro_cv_vtbl = {
285 574 0, 0, 0, 0,
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 575 coro_cv_free
287 576};
288#define CORO_MAGIC(cv) \
289 SvMAGIC (cv) \
290 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
291 ? SvMAGIC (cv) \
292 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
293 : 0
294 577
295/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
296static void 579static void
297get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
298{ 581{
299 MAGIC *mg = CORO_MAGIC (cv); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 583 AV *av;
301 584
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
304 else 587 else
305 { 588 {
306#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
312#else 596#else
313 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
314#endif 598#endif
315 } 599 }
316} 600}
317 601
318static void 602static void
319put_padlist (pTHX_ CV *cv) 603put_padlist (pTHX_ CV *cv)
320{ 604{
321 MAGIC *mg = CORO_MAGIC (cv); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av; 606 AV *av;
323 607
324 if (!mg) 608 if (expect_false (!mg))
325 { 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
326 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
327 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
328 mg->mg_virtual = &vtbl_coro;
329 mg->mg_obj = (SV *)newAV ();
330 }
331 610
332 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
333 612
334 if (AvFILLp (av) >= AvMAX (av)) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
335 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
336 615
337 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338} 617}
339 618
340/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
341 620
342#define SB do { 621/* swap sv heads, at least logically */
343#define SE } while (0) 622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
344 626
345#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
346 674
347static void 675static void
348load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
349{ 677{
678 perl_slots *slot = c->slot;
679 c->slot = 0;
680
681 PL_mainstack = c->mainstack;
682
683 GvSV (PL_defgv) = slot->defsv;
684 GvAV (PL_defgv) = slot->defav;
685 GvSV (PL_errgv) = slot->errsv;
686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
688
350#define VAR(name,type) PL_ ## name = c->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
351# include "state.h" 690 # include "state.h"
352#undef VAR 691 #undef VAR
353
354 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
355 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
356 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
357 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
358
359 if (c->irssv)
360 {
361 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
362 {
363 SvREFCNT_dec (c->irssv);
364 c->irssv = 0;
365 }
366 else
367 {
368 REPLACE_SV (PL_rs, c->irssv);
369 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
370 sv_setsv (c->irssv_sv, PL_rs);
371 }
372 }
373 692
374 { 693 {
375 dSP; 694 dSP;
695
376 CV *cv; 696 CV *cv;
377 697
378 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
380 { 700 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 702 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
384 } 704 }
385 705
386 PUTBACK; 706 PUTBACK;
387 } 707 }
708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
388} 729}
389 730
390static void 731static void
391save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
392{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
393 { 755 {
394 dSP; 756 dSP;
395 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
403 765
404 XPUSHs (Nullsv); 766 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
406 for (;;) 768 for (;;)
407 { 769 {
408 while (cxix >= 0) 770 while (expect_true (cxix >= 0))
409 { 771 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
411 773
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
413 { 775 {
414 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
415 777
416 if (CvDEPTH (cv)) 778 if (expect_true (CvDEPTH (cv)))
417 { 779 {
418 EXTEND (SP, 3); 780 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
422 784
423 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 786 get_padlist (aTHX_ cv);
425 } 787 }
426 } 788 }
427 } 789 }
428 790
429 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 792 break;
431 793
432 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
435 } 797 }
436 798
437 PUTBACK; 799 PUTBACK;
438 } 800 }
439 801
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 802 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 803 /* we manually unroll here, as usually 2 slots is enough */
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 804 if (SLOT_COUNT >= 1) CXINC;
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 805 if (SLOT_COUNT >= 2) CXINC;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 806 if (SLOT_COUNT >= 3) CXINC;
807 {
808 unsigned int i;
809 for (i = 3; i < SLOT_COUNT; ++i)
810 CXINC;
811 }
812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
445 813
814 c->mainstack = PL_mainstack;
815
816 {
817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
818
819 slot->defav = GvAV (PL_defgv);
820 slot->defsv = DEFSV;
821 slot->errsv = ERRSV;
822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
824
446#define VAR(name,type)c->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
447# include "state.h" 826 # include "state.h"
448#undef VAR 827 #undef VAR
828 }
449} 829}
450 830
451/* 831/*
452 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
456 */ 836 */
457#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
459#else 839#else
460static void 840static void
461coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
462{ 842{
463 PL_curstackinfo = new_stackinfo(64, 6); 843 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 847
468 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 851
472 New(50,PL_tmps_stack,64,SV*); 852 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 853 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 854 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 855 PL_tmps_max = 32;
476 856
477 New(54,PL_markstack,16,I32); 857 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 859 PL_markstack_max = PL_markstack + 16;
480 860
481#ifdef SET_MARK_OFFSET 861#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 862 SET_MARK_OFFSET;
483#endif 863#endif
484 864
485 New(54,PL_scopestack,16,I32); 865 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 866 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 867 PL_scopestack_max = 8;
488 868
489 New(54,PL_savestack,64,ANY); 869 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 870 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 871 PL_savestack_max = 24;
492 872
493#if !PERL_VERSION_ATLEAST (5,9,0) 873#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 874 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 875 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 876 PL_retstack_max = 4;
497#endif 877#endif
498} 878}
… …
500 880
501/* 881/*
502 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
503 */ 883 */
504static void 884static void
505coro_destroy_stacks (pTHX) 885coro_destruct_stacks (pTHX)
506{ 886{
507 if (!IN_DESTRUCT)
508 {
509 /* restore all saved variables and stuff */
510 LEAVE_SCOPE (0);
511 assert (PL_tmps_floor == -1);
512
513 /* free all temporaries */
514 FREETMPS;
515 assert (PL_tmps_ix == -1);
516
517 /* unwind all extra stacks */
518 POPSTACK_TO (PL_mainstack);
519
520 /* unwind main stack */
521 dounwind (-1);
522 }
523
524 while (PL_curstackinfo->si_next) 887 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
526 889
527 while (PL_curstackinfo) 890 while (PL_curstackinfo)
528 { 891 {
… …
538 901
539 Safefree (PL_tmps_stack); 902 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 903 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 904 Safefree (PL_scopestack);
542 Safefree (PL_savestack); 905 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 907 Safefree (PL_retstack);
545#endif 908#endif
546} 909}
547 910
911#define CORO_RSS \
912 rss += sizeof (SYM (curstackinfo)); \
913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
919
548static size_t 920static size_t
549coro_rss (struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
550{ 922{
551 size_t rss = sizeof (coro); 923 size_t rss = sizeof (*coro);
552 924
553 if (coro->mainstack) 925 if (coro->mainstack)
554 { 926 {
555 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
556 { 928 {
557 #define VAR(name,type)coro->name = PL_ ## name; 929 #define SYM(sym) PL_ ## sym
558 # include "state.h" 930 CORO_RSS;
559 #undef VAR 931 #undef SYM
560 } 932 }
933 else
934 {
935 #define SYM(sym) coro->slot->sym
936 CORO_RSS;
937 #undef SYM
938 }
939 }
561 940
562 rss += sizeof (coro->curstackinfo); 941 return rss;
563 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 942}
564 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
566 rss += coro->tmps_max * sizeof (SV *);
567 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
568 rss += coro->scopestack_max * sizeof (I32);
569 rss += coro->savestack_max * sizeof (ANY);
570 943
571#if !PERL_VERSION_ATLEAST (5,9,0) 944/** coroutine stack handling ************************************************/
572 rss += coro->retstack_max * sizeof (OP *); 945
946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
948static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
949
950/* apparently < 5.8.8 */
951#ifndef MgPV_nolen_const
952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
954 (const char*)(mg)->mg_ptr)
573#endif 955#endif
956
957/*
958 * This overrides the default magic get method of %SIG elements.
959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
960 * and instead of trying to save and restore the hash elements, we just provide
961 * readback here.
962 */
963static int
964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
965{
966 const char *s = MgPV_nolen_const (mg);
967
968 if (*s == '_')
574 } 969 {
970 SV **svp = 0;
575 971
972 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
973 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
974
975 if (svp)
976 {
977 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
978 return 0;
979 }
980 }
981
982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
983}
984
985static int
986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
987{
988 const char *s = MgPV_nolen_const (mg);
989
990 if (*s == '_')
991 {
992 SV **svp = 0;
993
994 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
996
997 if (svp)
998 {
999 SV *old = *svp;
1000 *svp = 0;
1001 SvREFCNT_dec (old);
1002 return 0;
1003 }
1004 }
1005
1006 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1007}
1008
1009static int
1010coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1011{
1012 const char *s = MgPV_nolen_const (mg);
1013
1014 if (*s == '_')
1015 {
1016 SV **svp = 0;
1017
1018 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1020
1021 if (svp)
1022 {
1023 SV *old = *svp;
1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1025 SvREFCNT_dec (old);
1026 return 0;
1027 }
1028 }
1029
1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1031}
1032
1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
1040static int
1041slf_check_nop (pTHX_ struct CoroSLF *frame)
1042{
576 return rss; 1043 return 0;
577} 1044}
578 1045
579/** coroutine stack handling ************************************************/
580
581static void 1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
583{ 1056{
584 /* 1057 /*
585 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
586 */ 1059 */
587 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
588 1061
1062 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
592 PL_curpm = 0; 1069 PL_curpm = 0;
1070 PL_curpad = 0;
593 PL_localizing = 0; 1071 PL_localizing = 0;
594 PL_dirty = 0;
595 PL_restartop = 0; 1072 PL_restartop = 0;
1073#if PERL_VERSION_ATLEAST (5,10,0)
1074 PL_parser = 0;
1075#endif
1076 PL_hints = 0;
1077
1078 /* recreate the die/warn hooks */
1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1081
1082 GvSV (PL_defgv) = newSV (0);
1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
1084 GvSV (PL_errgv) = newSV (0);
1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
1087 PL_rs = newSVsv (GvSV (irsgv));
1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 1089
597 { 1090 {
598 dSP; 1091 dSP;
599 LOGOP myop; 1092 UNOP myop;
600 1093
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 1094 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
606 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
607 1098
608 PUSHMARK (SP); 1099 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 1100 PUSHs ((SV *)coro->startcv);
610 PUTBACK; 1101 PUTBACK;
611 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN;
614 } 1104 }
615 1105
616 ENTER; /* necessary e.g. for dounwind */ 1106 /* this newly created coroutine might be run on an existing cctx which most
617} 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1108 */
1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
618 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
619static void 1132static void
1133coro_unwind_stacks (pTHX)
1134{
1135 if (!IN_DESTRUCT)
1136 {
1137 /* restore all saved variables and stuff */
1138 LEAVE_SCOPE (0);
1139 assert (PL_tmps_floor == -1);
1140
1141 /* free all temporaries */
1142 FREETMPS;
1143 assert (PL_tmps_ix == -1);
1144
1145 /* unwind all extra stacks */
1146 POPSTACK_TO (PL_mainstack);
1147
1148 /* unwind main stack */
1149 dounwind (-1);
1150 }
1151}
1152
1153static void
1154destroy_perl (pTHX_ struct coro *coro)
1155{
1156 SV *svf [9];
1157
1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 /*SvRV_set (coro_current, (SV *)coro->hv);*/
1165 load_perl (aTHX_ coro);
1166
1167 coro_unwind_stacks (aTHX);
1168 coro_destruct_stacks (aTHX);
1169
1170 /* restore swapped sv's */
1171 SWAP_SVS (coro);
1172
1173 // now save some sv's to be free'd later
1174 svf [0] = GvSV (PL_defgv);
1175 svf [1] = (SV *)GvAV (PL_defgv);
1176 svf [2] = GvSV (PL_errgv);
1177 svf [3] = (SV *)PL_defoutgv;
1178 svf [4] = PL_rs;
1179 svf [5] = GvSV (irsgv);
1180 svf [6] = (SV *)GvHV (PL_hintgv);
1181 svf [7] = PL_diehook;
1182 svf [8] = PL_warnhook;
1183 assert (9 == sizeof (svf) / sizeof (*svf));
1184
1185 /*SvRV_set (coro_current, (SV *)current->hv);*/
1186 load_perl (aTHX_ current);
1187 }
1188
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1193 SvREFCNT_dec (svf [i]);
1194
1195 SvREFCNT_dec (coro->saved_deffh);
1196 SvREFCNT_dec (coro->rouse_cb);
1197 SvREFCNT_dec (coro->invoke_cb);
1198 SvREFCNT_dec (coro->invoke_av);
1199 }
1200}
1201
1202INLINE void
620free_coro_mortal (pTHX) 1203free_coro_mortal (pTHX)
621{ 1204{
622 if (coro_mortal) 1205 if (expect_true (coro_mortal))
623 { 1206 {
624 SvREFCNT_dec (coro_mortal); 1207 SvREFCNT_dec (coro_mortal);
625 coro_mortal = 0; 1208 coro_mortal = 0;
626 } 1209 }
627} 1210}
628 1211
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 1212static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 1213runops_trace (pTHX)
631/* during execution of a perl program */ 1214{
1215 COP *oldcop = 0;
1216 int oldcxix = -2;
1217
1218 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1219 {
1220 PERL_ASYNC_CHECK ();
1221
1222 if (cctx_current->flags & CC_TRACE_ALL)
1223 {
1224 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1225 {
1226 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1227 SV **bot, **top;
1228 AV *av = newAV (); /* return values */
1229 SV **cb;
1230 dSP;
1231
1232 GV *gv = CvGV (cx->blk_sub.cv);
1233 SV *fullname = sv_2mortal (newSV (0));
1234 if (isGV (gv))
1235 gv_efullname3 (fullname, gv, 0);
1236
1237 bot = PL_stack_base + cx->blk_oldsp + 1;
1238 top = cx->blk_gimme == G_ARRAY ? SP + 1
1239 : cx->blk_gimme == G_SCALAR ? bot + 1
1240 : bot;
1241
1242 av_extend (av, top - bot);
1243 while (bot < top)
1244 av_push (av, SvREFCNT_inc_NN (*bot++));
1245
1246 PL_runops = RUNOPS_DEFAULT;
1247 ENTER;
1248 SAVETMPS;
1249 EXTEND (SP, 3);
1250 PUSHMARK (SP);
1251 PUSHs (&PL_sv_no);
1252 PUSHs (fullname);
1253 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1254 PUTBACK;
1255 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1256 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1257 SPAGAIN;
1258 FREETMPS;
1259 LEAVE;
1260 PL_runops = runops_trace;
1261 }
1262
1263 if (oldcop != PL_curcop)
1264 {
1265 oldcop = PL_curcop;
1266
1267 if (PL_curcop != &PL_compiling)
1268 {
1269 SV **cb;
1270
1271 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1272 {
1273 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1274
1275 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1276 {
1277 dSP;
1278 GV *gv = CvGV (cx->blk_sub.cv);
1279 SV *fullname = sv_2mortal (newSV (0));
1280
1281 if (isGV (gv))
1282 gv_efullname3 (fullname, gv, 0);
1283
1284 PL_runops = RUNOPS_DEFAULT;
1285 ENTER;
1286 SAVETMPS;
1287 EXTEND (SP, 3);
1288 PUSHMARK (SP);
1289 PUSHs (&PL_sv_yes);
1290 PUSHs (fullname);
1291 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1292 PUTBACK;
1293 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1294 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1295 SPAGAIN;
1296 FREETMPS;
1297 LEAVE;
1298 PL_runops = runops_trace;
1299 }
1300
1301 oldcxix = cxstack_ix;
1302 }
1303
1304 if (cctx_current->flags & CC_TRACE_LINE)
1305 {
1306 dSP;
1307
1308 PL_runops = RUNOPS_DEFAULT;
1309 ENTER;
1310 SAVETMPS;
1311 EXTEND (SP, 3);
1312 PL_runops = RUNOPS_DEFAULT;
1313 PUSHMARK (SP);
1314 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1315 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1316 PUTBACK;
1317 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1318 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1319 SPAGAIN;
1320 FREETMPS;
1321 LEAVE;
1322 PL_runops = runops_trace;
1323 }
1324 }
1325 }
1326 }
1327 }
1328
1329 TAINT_NOT;
1330 return 0;
1331}
1332
1333static struct CoroSLF cctx_ssl_frame;
1334
1335static void
1336slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1337{
1338 ta->prev = 0;
1339}
1340
1341static int
1342slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1343{
1344 *frame = cctx_ssl_frame;
1345
1346 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1347}
1348
1349/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
632static void NOINLINE 1350static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx) 1351cctx_prepare (pTHX)
634{ 1352{
635 dSP; 1353 PL_top_env = &PL_start_env;
636 LOGOP myop;
637 1354
638 Zero (&myop, 1, LOGOP); 1355 if (cctx_current->flags & CC_TRACE)
639 myop.op_next = PL_op; 1356 PL_runops = runops_trace;
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
641 1357
642 PUSHMARK (SP); 1358 /* we already must be executing an SLF op, there is no other valid way
643 EXTEND (SP, 2); 1359 * that can lead to creation of a new cctx */
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1360 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1361 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
646 PUTBACK; 1362
647 PL_op = (OP *)&myop; 1363 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1364 cctx_ssl_frame = slf_frame;
649 SPAGAIN; 1365
1366 slf_frame.prepare = slf_prepare_set_stacklevel;
1367 slf_frame.check = slf_check_set_stacklevel;
1368}
1369
1370/* the tail of transfer: execute stuff we can only do after a transfer */
1371INLINE void
1372transfer_tail (pTHX)
1373{
1374 free_coro_mortal (aTHX);
650} 1375}
651 1376
652/* 1377/*
653 * this is a _very_ stripped down perl interpreter ;) 1378 * this is a _very_ stripped down perl interpreter ;)
654 */ 1379 */
655static void 1380static void
656coro_run (void *arg) 1381cctx_run (void *arg)
657{ 1382{
1383#ifdef USE_ITHREADS
1384# if CORO_PTHREAD
1385 PERL_SET_CONTEXT (coro_thx);
1386# endif
1387#endif
1388 {
658 dTHX; 1389 dTHX;
659 1390
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1391 /* normally we would need to skip the entersub here */
661 UNLOCK; 1392 /* not doing so will re-execute it, which is exactly what we want */
1393 /* PL_nop = PL_nop->op_next */
662 1394
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1395 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1396 cctx_prepare (aTHX);
667 1397
1398 /* cctx_run is the alternative tail of transfer() */
1399 transfer_tail (aTHX);
1400
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1401 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1402 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1403 perl_run (PL_curinterp);
671
672 /* 1404 /*
1405 * Unfortunately, there is no way to get at the return values of the
1406 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1407 * runtime errors here, as this is just a random interpreter, not a thread.
1408 */
1409
1410 /*
673 * If perl-run returns we assume exit() was being called or the coro 1411 * If perl-run returns we assume exit() was being called or the coro
674 * fell off the end, which seems to be the only valid (non-bug) 1412 * fell off the end, which seems to be the only valid (non-bug)
675 * reason for perl_run to return. We try to exit by jumping to the 1413 * reason for perl_run to return. We try to exit by jumping to the
676 * bootstrap-time "top" top_env, as we cannot restore the "main" 1414 * bootstrap-time "top" top_env, as we cannot restore the "main"
677 * coroutine as Coro has no such concept 1415 * coroutine as Coro has no such concept.
1416 * This actually isn't valid with the pthread backend, but OSes requiring
1417 * that backend are too broken to do it in a standards-compliant way.
678 */ 1418 */
679 PL_top_env = main_top_env; 1419 PL_top_env = main_top_env;
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1420 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1421 }
681} 1422}
682 1423
683static coro_cctx * 1424static coro_cctx *
684cctx_new () 1425cctx_new ()
685{ 1426{
686 coro_cctx *cctx; 1427 coro_cctx *cctx;
1428
1429 ++cctx_count;
1430 New (0, cctx, 1, coro_cctx);
1431
1432 cctx->gen = cctx_gen;
1433 cctx->flags = 0;
1434 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1435
1436 return cctx;
1437}
1438
1439/* create a new cctx only suitable as source */
1440static coro_cctx *
1441cctx_new_empty ()
1442{
1443 coro_cctx *cctx = cctx_new ();
1444
1445 cctx->sptr = 0;
1446 coro_create (&cctx->cctx, 0, 0, 0, 0);
1447
1448 return cctx;
1449}
1450
1451/* create a new cctx suitable as destination/running a perl interpreter */
1452static coro_cctx *
1453cctx_new_run ()
1454{
1455 coro_cctx *cctx = cctx_new ();
687 void *stack_start; 1456 void *stack_start;
688 size_t stack_size; 1457 size_t stack_size;
689 1458
690 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx);
693
694#if HAVE_MMAP 1459#if HAVE_MMAP
695
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1460 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
697 /* mmap supposedly does allocate-on-write for us */ 1461 /* mmap supposedly does allocate-on-write for us */
698 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1462 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1463
700 if (cctx->sptr != (void *)-1) 1464 if (cctx->sptr != (void *)-1)
701 { 1465 {
702# if CORO_STACKGUARD 1466 #if CORO_STACKGUARD
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1467 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
704# endif 1468 #endif
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1469 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1470 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
707 cctx->mapped = 1; 1471 cctx->flags |= CC_MAPPED;
708 } 1472 }
709 else 1473 else
710#endif 1474#endif
711 { 1475 {
712 cctx->ssize = coro_stacksize * (long)sizeof (long); 1476 cctx->ssize = cctx_stacksize * (long)sizeof (long);
713 New (0, cctx->sptr, coro_stacksize, long); 1477 New (0, cctx->sptr, cctx_stacksize, long);
714 1478
715 if (!cctx->sptr) 1479 if (!cctx->sptr)
716 { 1480 {
717 perror ("FATAL: unable to allocate stack for coroutine"); 1481 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1482 _exit (EXIT_FAILURE);
719 } 1483 }
720 1484
721 stack_start = cctx->sptr; 1485 stack_start = cctx->sptr;
722 stack_size = cctx->ssize; 1486 stack_size = cctx->ssize;
723 } 1487 }
724 1488
725 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1489 #if CORO_USE_VALGRIND
1490 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1491 #endif
1492
726 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1493 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
727 1494
728 return cctx; 1495 return cctx;
729} 1496}
730 1497
731static void 1498static void
732cctx_destroy (coro_cctx *cctx) 1499cctx_destroy (coro_cctx *cctx)
733{ 1500{
734 if (!cctx) 1501 if (!cctx)
735 return; 1502 return;
736 1503
1504 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1505
737 --cctx_count; 1506 --cctx_count;
1507 coro_destroy (&cctx->cctx);
738 1508
1509 /* coro_transfer creates new, empty cctx's */
1510 if (cctx->sptr)
1511 {
739#if CORO_USE_VALGRIND 1512 #if CORO_USE_VALGRIND
740 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1513 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1514 #endif
1515
1516#if HAVE_MMAP
1517 if (cctx->flags & CC_MAPPED)
1518 munmap (cctx->sptr, cctx->ssize);
1519 else
741#endif 1520#endif
742
743#if HAVE_MMAP
744 if (cctx->mapped)
745 munmap (cctx->sptr, cctx->ssize);
746 else
747#endif
748 Safefree (cctx->sptr); 1521 Safefree (cctx->sptr);
1522 }
749 1523
750 Safefree (cctx); 1524 Safefree (cctx);
751} 1525}
1526
1527/* wether this cctx should be destructed */
1528#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1529
753static coro_cctx * 1530static coro_cctx *
754cctx_get (pTHX) 1531cctx_get (pTHX)
755{ 1532{
756 while (cctx_first) 1533 while (expect_true (cctx_first))
757 { 1534 {
758 coro_cctx *cctx = cctx_first; 1535 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1536 cctx_first = cctx->next;
760 --cctx_idle; 1537 --cctx_idle;
761 1538
762 if (cctx->ssize >= coro_stacksize) 1539 if (expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1540 return cctx;
764 1541
765 cctx_destroy (cctx); 1542 cctx_destroy (cctx);
766 } 1543 }
767 1544
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1545 return cctx_new_run ();
770} 1546}
771 1547
772static void 1548static void
773cctx_put (coro_cctx *cctx) 1549cctx_put (coro_cctx *cctx)
774{ 1550{
1551 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1552
775 /* free another cctx if overlimit */ 1553 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1554 if (expect_false (cctx_idle >= cctx_max_idle))
777 { 1555 {
778 coro_cctx *first = cctx_first; 1556 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1557 cctx_first = first->next;
780 --cctx_idle; 1558 --cctx_idle;
781 1559
782 assert (!first->inuse);
783 cctx_destroy (first); 1560 cctx_destroy (first);
784 } 1561 }
785 1562
786 ++cctx_idle; 1563 ++cctx_idle;
787 cctx->next = cctx_first; 1564 cctx->next = cctx_first;
788 cctx_first = cctx; 1565 cctx_first = cctx;
789} 1566}
790 1567
791/** coroutine switching *****************************************************/ 1568/** coroutine switching *****************************************************/
792 1569
793/* never call directly, always through the coro_state_transfer global variable */ 1570static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1571transfer_check (pTHX_ struct coro *prev, struct coro *next)
1572{
1573 /* TODO: throwing up here is considered harmful */
1574
1575 if (expect_true (prev != next))
1576 {
1577 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1579
1580 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1582
1583#if !PERL_VERSION_ATLEAST (5,10,0)
1584 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1586#endif
1587 }
1588}
1589
1590/* always use the TRANSFER macro */
1591static void NOINLINE /* noinline so we have a fixed stackframe */
1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1593{
797 dSTACKLEVEL; 1594 dSTACKLEVEL;
798 1595
799 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1597 if (expect_false (!prev))
801 { 1598 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1599 cctx_current->idle_sp = STACKLEVEL;
803 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 }
805 else if (prev != next)
806 { 1601 }
1602 else if (expect_true (prev != next))
1603 {
807 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
808 1605
809 if (prev->flags & CF_NEW) 1606 if (expect_false (prev->flags & CF_NEW))
810 { 1607 {
811 /* create a new empty context */ 1608 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx);
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
816 } 1611 }
817 1612
818 /*TODO: must not croak here */
819 if (!prev->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
821
822 if (next->flags & CF_RUNNING)
823 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
824
825 if (next->flags & CF_DESTROYED)
826 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
827
828 prev->flags &= ~CF_RUNNING; 1613 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1614 next->flags |= CF_RUNNING;
830 1615
831 LOCK; 1616 /* first get rid of the old state */
1617 save_perl (aTHX_ prev);
832 1618
833 if (next->flags & CF_NEW) 1619 if (expect_false (next->flags & CF_NEW))
834 { 1620 {
835 /* need to start coroutine */ 1621 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1623 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1624 init_perl (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1625 }
844 else 1626 else
1627 load_perl (aTHX_ next);
1628
1629 /* possibly untie and reuse the cctx */
1630 if (expect_true (
1631 cctx_current->idle_sp == STACKLEVEL
1632 && !(cctx_current->flags & CC_TRACE)
1633 && !force_cctx
1634 ))
845 { 1635 {
846 /* coroutine already started */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
848 load_perl (aTHX_ next); 1638
1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1641 if (expect_false (CCTX_EXPIRED (cctx_current)))
1642 if (expect_true (!next->cctx))
1643 next->cctx = cctx_get (aTHX);
1644
1645 cctx_put (cctx_current);
849 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
850 1649
851 prev__cctx = prev->cctx; 1650 ++next->usecount;
852 1651
853 /* possibly "free" the cctx */ 1652 cctx_prev = cctx_current;
854 if (prev__cctx->idle_sp == STACKLEVEL) 1653 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1654
1655 next->cctx = 0;
1656
1657 if (expect_false (cctx_prev != cctx_current))
855 { 1658 {
856 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1659 cctx_prev->top_env = PL_top_env;
857 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1660 PL_top_env = cctx_current->top_env;
858 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
859 prev->cctx = 0;
860
861 cctx_put (prev__cctx);
862 prev__cctx->inuse = 0;
863 } 1662 }
864 1663
865 if (!next->cctx) 1664 transfer_tail (aTHX);
866 {
867 next->cctx = cctx_get (aTHX);
868 assert (!next->cctx->inuse);
869 next->cctx->inuse = 1;
870 }
871
872 if (prev__cctx != next->cctx)
873 {
874 prev__cctx->top_env = PL_top_env;
875 PL_top_env = next->cctx->top_env;
876 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877 }
878
879 free_coro_mortal (aTHX);
880 UNLOCK;
881 } 1665 }
882} 1666}
883 1667
884struct transfer_args 1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
885{
886 struct coro *prev, *next;
887};
888
889#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1670
891/** high level stuff ********************************************************/ 1671/** high level stuff ********************************************************/
892 1672
893static int 1673static void
894coro_state_destroy (pTHX_ struct coro *coro) 1674coro_state_destroy (pTHX_ struct coro *coro)
895{ 1675{
896 if (coro->flags & CF_DESTROYED) 1676 if (coro->flags & CF_DESTROYED)
897 return 0; 1677 return;
1678
1679 /* this callback is reserved for slf functions needing to do cleanup */
1680 if (coro->on_destroy && !PL_dirty)
1681 coro->on_destroy (aTHX_ coro);
1682
1683 /*
1684 * The on_destroy above most likely is from an SLF call.
1685 * Since by definition the SLF call will not finish when we destroy
1686 * the coro, we will have to force-finish it here, otherwise
1687 * cleanup functions cannot call SLF functions.
1688 */
1689 coro->slf_frame.prepare = 0;
898 1690
899 coro->flags |= CF_DESTROYED; 1691 coro->flags |= CF_DESTROYED;
900 1692
901 if (coro->flags & CF_READY) 1693 if (coro->flags & CF_READY)
902 { 1694 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1695 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1696 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1697 --coro_nready;
907 UNLOCK;
908 } 1698 }
909 else 1699 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1700 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
911 1701
912 if (coro->mainstack && coro->mainstack != main_mainstack) 1702 if (coro->mainstack
913 { 1703 && coro->mainstack != main_mainstack
914 struct coro temp; 1704 && coro->slot
915 1705 && !PL_dirty)
916 assert (!(coro->flags & CF_RUNNING));
917
918 Zero (&temp, 1, struct coro);
919 temp.save = CORO_SAVE_ALL;
920
921 if (coro->flags & CF_RUNNING)
922 croak ("FATAL: tried to destroy currently running coroutine");
923
924 save_perl (aTHX_ &temp);
925 load_perl (aTHX_ coro); 1706 destroy_perl (aTHX_ coro);
926
927 coro_destroy_stacks (aTHX);
928
929 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
930
931 coro->mainstack = 0;
932 }
933
934 cctx_destroy (coro->cctx);
935 SvREFCNT_dec (coro->args);
936 1707
937 if (coro->next) coro->next->prev = coro->prev; 1708 if (coro->next) coro->next->prev = coro->prev;
938 if (coro->prev) coro->prev->next = coro->next; 1709 if (coro->prev) coro->prev->next = coro->next;
939 if (coro == coro_first) coro_first = coro->next; 1710 if (coro == coro_first) coro_first = coro->next;
940 1711
941 return 1; 1712 cctx_destroy (coro->cctx);
1713 SvREFCNT_dec (coro->startcv);
1714 SvREFCNT_dec (coro->args);
1715 SvREFCNT_dec (coro->swap_sv);
1716 SvREFCNT_dec (CORO_THROW);
942} 1717}
943 1718
944static int 1719static int
945coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1720coro_state_free (pTHX_ SV *sv, MAGIC *mg)
946{ 1721{
… …
977#else 1752#else
978# define MGf_DUP 0 1753# define MGf_DUP 0
979#endif 1754#endif
980}; 1755};
981 1756
982static struct coro *
983SvSTATE_ (pTHX_ SV *coro)
984{
985 HV *stash;
986 MAGIC *mg;
987
988 if (SvROK (coro))
989 coro = SvRV (coro);
990
991 stash = SvSTASH (coro);
992 if (stash != coro_stash && stash != coro_state_stash)
993 {
994 /* very slow, but rare, check */
995 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
996 croak ("Coro::State object required");
997 }
998
999 mg = CORO_MAGIC (coro);
1000 return (struct coro *)mg->mg_ptr;
1001}
1002
1003#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1004
1005static void 1757static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1758prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1759{
1008 ta->prev = SvSTATE (prev_sv); 1760 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1761 ta->next = SvSTATE (next_sv);
1762 TRANSFER_CHECK (*ta);
1010} 1763}
1011 1764
1012static void 1765static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1766api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1767{
1768 struct coro_transfer_args ta;
1769
1770 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1771 TRANSFER (ta, 1);
1772}
1773
1774/** Coro ********************************************************************/
1775
1776INLINE void
1777coro_enq (pTHX_ struct coro *coro)
1778{
1779 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1780
1781 SvREFCNT_inc_NN (coro->hv);
1782
1783 coro->next_ready = 0;
1784 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1785 ready [1] = coro;
1786}
1787
1788INLINE struct coro *
1789coro_deq (pTHX)
1790{
1791 int prio;
1792
1793 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1794 {
1795 struct coro **ready = coro_ready [prio];
1796
1797 if (ready [0])
1798 {
1799 struct coro *coro = ready [0];
1800 ready [0] = coro->next_ready;
1801 return coro;
1802 }
1803 }
1804
1805 return 0;
1806}
1807
1808static void
1809invoke_sv_ready_hook_helper (void)
1014{ 1810{
1015 dTHX; 1811 dTHX;
1016 struct transfer_args ta; 1812 dSP;
1017 1813
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1814 ENTER;
1019 TRANSFER (ta); 1815 SAVETMPS;
1816
1817 PUSHMARK (SP);
1818 PUTBACK;
1819 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1820
1821 FREETMPS;
1822 LEAVE;
1020} 1823}
1021 1824
1022static int 1825static int
1023api_save (SV *coro_sv, int new_save) 1826api_ready (pTHX_ SV *coro_sv)
1024{ 1827{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv); 1828 struct coro *coro = SvSTATE (coro_sv);
1027 int old_save = coro->save;
1028
1029 if (new_save >= 0)
1030 coro->save = new_save;
1031
1032 return old_save;
1033}
1034
1035/** Coro ********************************************************************/
1036
1037static void
1038coro_enq (pTHX_ SV *coro_sv)
1039{
1040 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1041}
1042
1043static SV *
1044coro_deq (pTHX_ int min_prio)
1045{
1046 int prio = PRIO_MAX - PRIO_MIN;
1047
1048 min_prio -= PRIO_MIN;
1049 if (min_prio < 0)
1050 min_prio = 0;
1051
1052 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1053 if (AvFILLp (coro_ready [prio]) >= 0)
1054 return av_shift (coro_ready [prio]);
1055
1056 return 0;
1057}
1058
1059static int
1060api_ready (SV *coro_sv)
1061{
1062 dTHX;
1063 struct coro *coro;
1064
1065 if (SvROK (coro_sv))
1066 coro_sv = SvRV (coro_sv);
1067
1068 coro = SvSTATE (coro_sv);
1069 1829
1070 if (coro->flags & CF_READY) 1830 if (coro->flags & CF_READY)
1071 return 0; 1831 return 0;
1072 1832
1073 coro->flags |= CF_READY; 1833 coro->flags |= CF_READY;
1074 1834
1075 LOCK; 1835 coro_enq (aTHX_ coro);
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1836
1077 ++coro_nready; 1837 if (!coro_nready++)
1078 UNLOCK; 1838 if (coroapi.readyhook)
1839 coroapi.readyhook ();
1079 1840
1080 return 1; 1841 return 1;
1081} 1842}
1082 1843
1083static int 1844static int
1084api_is_ready (SV *coro_sv) 1845api_is_ready (pTHX_ SV *coro_sv)
1085{ 1846{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1847 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1848}
1089 1849
1850/* expects to own a reference to next->hv */
1851INLINE void
1852prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1853{
1854 SV *prev_sv = SvRV (coro_current);
1855
1856 ta->prev = SvSTATE_hv (prev_sv);
1857 ta->next = next;
1858
1859 TRANSFER_CHECK (*ta);
1860
1861 SvRV_set (coro_current, (SV *)next->hv);
1862
1863 free_coro_mortal (aTHX);
1864 coro_mortal = prev_sv;
1865}
1866
1090static void 1867static void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1868prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1869{
1093 SV *prev_sv, *next_sv;
1094
1095 for (;;) 1870 for (;;)
1096 { 1871 {
1097 LOCK; 1872 struct coro *next = coro_deq (aTHX);
1098 next_sv = coro_deq (aTHX_ PRIO_MIN);
1099 1873
1874 if (expect_true (next))
1875 {
1876 /* cannot transfer to destroyed coros, skip and look for next */
1877 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1878 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1879 else
1880 {
1881 next->flags &= ~CF_READY;
1882 --coro_nready;
1883
1884 prepare_schedule_to (aTHX_ ta, next);
1885 break;
1886 }
1887 }
1888 else
1889 {
1100 /* nothing to schedule: call the idle handler */ 1890 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1891 if (SvROK (sv_idle)
1892 && SvOBJECT (SvRV (sv_idle)))
1893 {
1894 if (SvRV (sv_idle) == SvRV (coro_current))
1895 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1896
1897 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1898 api_ready (aTHX_ SvRV (sv_idle));
1899 --coro_nready;
1900 }
1901 else
1902 {
1903 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1904 dSP;
1905
1906 ENTER;
1907 SAVETMPS;
1908
1909 PUSHMARK (SP);
1910 PUTBACK;
1911 call_sv (sv_idle, G_VOID | G_DISCARD);
1912
1913 FREETMPS;
1914 LEAVE;
1915 }
1916 }
1917 }
1918}
1919
1920INLINE void
1921prepare_cede (pTHX_ struct coro_transfer_args *ta)
1922{
1923 api_ready (aTHX_ coro_current);
1924 prepare_schedule (aTHX_ ta);
1925}
1926
1927INLINE void
1928prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1929{
1930 SV *prev = SvRV (coro_current);
1931
1932 if (coro_nready)
1933 {
1934 prepare_schedule (aTHX_ ta);
1935 api_ready (aTHX_ prev);
1936 }
1937 else
1938 prepare_nop (aTHX_ ta);
1939}
1940
1941static void
1942api_schedule (pTHX)
1943{
1944 struct coro_transfer_args ta;
1945
1946 prepare_schedule (aTHX_ &ta);
1947 TRANSFER (ta, 1);
1948}
1949
1950static void
1951api_schedule_to (pTHX_ SV *coro_sv)
1952{
1953 struct coro_transfer_args ta;
1954 struct coro *next = SvSTATE (coro_sv);
1955
1956 SvREFCNT_inc_NN (coro_sv);
1957 prepare_schedule_to (aTHX_ &ta, next);
1958}
1959
1960static int
1961api_cede (pTHX)
1962{
1963 struct coro_transfer_args ta;
1964
1965 prepare_cede (aTHX_ &ta);
1966
1967 if (expect_true (ta.prev != ta.next))
1968 {
1969 TRANSFER (ta, 1);
1970 return 1;
1971 }
1972 else
1973 return 0;
1974}
1975
1976static int
1977api_cede_notself (pTHX)
1978{
1979 if (coro_nready)
1980 {
1981 struct coro_transfer_args ta;
1982
1983 prepare_cede_notself (aTHX_ &ta);
1984 TRANSFER (ta, 1);
1985 return 1;
1986 }
1987 else
1988 return 0;
1989}
1990
1991static void
1992api_trace (pTHX_ SV *coro_sv, int flags)
1993{
1994 struct coro *coro = SvSTATE (coro_sv);
1995
1996 if (coro->flags & CF_RUNNING)
1997 croak ("cannot enable tracing on a running coroutine, caught");
1998
1999 if (flags & CC_TRACE)
2000 {
2001 if (!coro->cctx)
2002 coro->cctx = cctx_new_run ();
2003 else if (!(coro->cctx->flags & CC_TRACE))
2004 croak ("cannot enable tracing on coroutine with custom stack, caught");
2005
2006 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2007 }
2008 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2009 {
2010 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2011
2012 if (coro->flags & CF_RUNNING)
2013 PL_runops = RUNOPS_DEFAULT;
2014 else
2015 coro->slot->runops = RUNOPS_DEFAULT;
2016 }
2017}
2018
2019static void
2020coro_call_on_destroy (pTHX_ struct coro *coro)
2021{
2022 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2023
2024 if (on_destroyp)
2025 {
2026 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2027 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2028 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2029
2030 while (AvFILLp (on_destroy) >= 0)
2031 {
2032 dSP; /* don't disturb outer sp */
2033 SV *cb = av_pop (on_destroy);
2034
2035 PUSHMARK (SP);
2036
2037 if (statusp)
2038 {
2039 int i;
2040 EXTEND (SP, AvFILLp (status) + 1);
2041
2042 for (i = 0; i <= AvFILLp (status); ++i)
2043 PUSHs (AvARRAY (status)[i]);
2044 }
2045
2046 PUTBACK;
2047 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2048 }
2049 }
2050}
2051
2052static void
2053coro_set_status (HV *coro_hv, SV **arg, int items)
2054{
2055 AV *av = newAV ();
2056
2057 /* items are actually not so common, so optimise for this case */
2058 if (items)
2059 {
2060 int i;
2061
2062 av_extend (av, items - 1);
2063
2064 for (i = 0; i < items; ++i)
2065 av_push (av, SvREFCNT_inc_NN (arg [i]));
2066 }
2067
2068 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2069}
2070
2071static void
2072slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2073{
2074 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2075 api_ready (aTHX_ sv_manager);
2076
2077 frame->prepare = prepare_schedule;
2078 frame->check = slf_check_repeat;
2079
2080 /* as a minor optimisation, we could unwind all stacks here */
2081 /* but that puts extra pressure on pp_slf, and is not worth much */
2082 /*coro_unwind_stacks (aTHX);*/
2083}
2084
2085static void
2086slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2087{
2088 HV *coro_hv = (HV *)SvRV (coro_current);
2089
2090 coro_set_status (coro_hv, arg, items);
2091 slf_init_terminate_cancel_common (frame, coro_hv);
2092}
2093
2094static void
2095slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 HV *coro_hv;
2098 struct coro *coro;
2099
2100 if (items <= 0)
2101 croak ("Coro::cancel called without coro object,");
2102
2103 coro = SvSTATE (arg [0]);
2104 coro_hv = coro->hv;
2105
2106 coro_set_status (coro_hv, arg + 1, items - 1);
2107
2108 if (expect_false (coro->flags & CF_NOCANCEL))
2109 {
2110 /* coro currently busy cancelling something, so just notify it */
2111 coro->slf_frame.data = (void *)coro;
2112
2113 frame->prepare = prepare_nop;
2114 frame->check = slf_check_nop;
2115 }
2116 else if (coro_hv == (HV *)SvRV (coro_current))
2117 {
2118 /* cancelling the current coro is allowed, and equals terminate */
2119 slf_init_terminate_cancel_common (frame, coro_hv);
2120 }
2121 else
2122 {
2123 struct coro *self = SvSTATE_current;
2124
2125 /* otherwise we cancel directly, purely for speed reasons
2126 * unfortunately, this requires some magic trickery, as
2127 * somebody else could cancel us, so we have to fight the cancellation.
2128 * this is ugly, and hopefully fully worth the extra speed.
2129 * besides, I can't get the slow-but-safe version working...
2130 */
2131 slf_frame.data = 0;
2132 self->flags |= CF_NOCANCEL;
2133
2134 coro_state_destroy (aTHX_ coro);
2135 coro_call_on_destroy (aTHX_ coro);
2136
2137 self->flags &= ~CF_NOCANCEL;
2138
2139 if (slf_frame.data)
2140 {
2141 /* while we were busy we have been cancelled, so terminate */
2142 slf_init_terminate_cancel_common (frame, self->hv);
2143 }
2144 else
2145 {
2146 frame->prepare = prepare_nop;
2147 frame->check = slf_check_nop;
2148 }
2149 }
2150}
2151
2152/*****************************************************************************/
2153/* async pool handler */
2154
2155static int
2156slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2157{
2158 HV *hv = (HV *)SvRV (coro_current);
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->invoke_cb)
2162 return 1; /* loop till we have invoke */
2163 else
2164 {
2165 hv_store (hv, "desc", sizeof ("desc") - 1,
2166 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2167
2168 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2169
2170 {
2171 dSP;
2172 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2173 PUTBACK;
2174 }
2175
2176 SvREFCNT_dec (GvAV (PL_defgv));
2177 GvAV (PL_defgv) = coro->invoke_av;
2178 coro->invoke_av = 0;
2179
2180 return 0;
2181 }
2182}
2183
2184static void
2185slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *hv = (HV *)SvRV (coro_current);
2188 struct coro *coro = SvSTATE_hv ((SV *)hv);
2189
2190 if (expect_true (coro->saved_deffh))
2191 {
2192 /* subsequent iteration */
2193 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2194 coro->saved_deffh = 0;
2195
2196 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2197 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2198 {
2199 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2200 coro->invoke_av = newAV ();
2201
2202 frame->prepare = prepare_nop;
2203 }
2204 else
2205 {
2206 av_clear (GvAV (PL_defgv));
2207 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2208
2209 coro->prio = 0;
2210
2211 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2212 api_trace (aTHX_ coro_current, 0);
2213
2214 frame->prepare = prepare_schedule;
2215 av_push (av_async_pool, SvREFCNT_inc (hv));
2216 }
2217 }
2218 else
2219 {
2220 /* first iteration, simply fall through */
2221 frame->prepare = prepare_nop;
2222 }
2223
2224 frame->check = slf_check_pool_handler;
2225 frame->data = (void *)coro;
2226}
2227
2228/*****************************************************************************/
2229/* rouse callback */
2230
2231#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2232
2233static void
2234coro_rouse_callback (pTHX_ CV *cv)
2235{
2236 dXSARGS;
2237 SV *data = (SV *)S_GENSUB_ARG;
2238
2239 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2240 {
2241 /* first call, set args */
2242 SV *coro = SvRV (data);
2243 AV *av = newAV ();
2244
2245 SvRV_set (data, (SV *)av);
2246
2247 /* better take a full copy of the arguments */
2248 while (items--)
2249 av_store (av, items, newSVsv (ST (items)));
2250
2251 api_ready (aTHX_ coro);
2252 SvREFCNT_dec (coro);
2253 }
2254
2255 XSRETURN_EMPTY;
2256}
2257
2258static int
2259slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2260{
2261 SV *data = (SV *)frame->data;
2262
2263 if (CORO_THROW)
2264 return 0;
2265
2266 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2267 return 1;
2268
2269 /* now push all results on the stack */
2270 {
2271 dSP;
2272 AV *av = (AV *)SvRV (data);
2273 int i;
2274
2275 EXTEND (SP, AvFILLp (av) + 1);
2276 for (i = 0; i <= AvFILLp (av); ++i)
2277 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2278
2279 /* we have stolen the elements, so set length to zero and free */
2280 AvFILLp (av) = -1;
2281 av_undef (av);
2282
2283 PUTBACK;
2284 }
2285
2286 return 0;
2287}
2288
2289static void
2290slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 SV *cb;
2293
2294 if (items)
2295 cb = arg [0];
2296 else
2297 {
2298 struct coro *coro = SvSTATE_current;
2299
2300 if (!coro->rouse_cb)
2301 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2302
2303 cb = sv_2mortal (coro->rouse_cb);
2304 coro->rouse_cb = 0;
2305 }
2306
2307 if (!SvROK (cb)
2308 || SvTYPE (SvRV (cb)) != SVt_PVCV
2309 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2310 croak ("Coro::rouse_wait called with illegal callback argument,");
2311
2312 {
2313 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2314 SV *data = (SV *)S_GENSUB_ARG;
2315
2316 frame->data = (void *)data;
2317 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2318 frame->check = slf_check_rouse_wait;
2319 }
2320}
2321
2322static SV *
2323coro_new_rouse_cb (pTHX)
2324{
2325 HV *hv = (HV *)SvRV (coro_current);
2326 struct coro *coro = SvSTATE_hv (hv);
2327 SV *data = newRV_inc ((SV *)hv);
2328 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2329
2330 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2331 SvREFCNT_dec (data); /* magicext increases the refcount */
2332
2333 SvREFCNT_dec (coro->rouse_cb);
2334 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2335
2336 return cb;
2337}
2338
2339/*****************************************************************************/
2340/* schedule-like-function opcode (SLF) */
2341
2342static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2343static const CV *slf_cv;
2344static SV **slf_argv;
2345static int slf_argc, slf_arga; /* count, allocated */
2346static I32 slf_ax; /* top of stack, for restore */
2347
2348/* this restores the stack in the case we patched the entersub, to */
2349/* recreate the stack frame as perl will on following calls */
2350/* since entersub cleared the stack */
2351static OP *
2352pp_restore (pTHX)
2353{
2354 int i;
2355 SV **SP = PL_stack_base + slf_ax;
2356
2357 PUSHMARK (SP);
2358
2359 EXTEND (SP, slf_argc + 1);
2360
2361 for (i = 0; i < slf_argc; ++i)
2362 PUSHs (sv_2mortal (slf_argv [i]));
2363
2364 PUSHs ((SV *)CvGV (slf_cv));
2365
2366 RETURNOP (slf_restore.op_first);
2367}
2368
2369static void
2370slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2371{
2372 SV **arg = (SV **)slf_frame.data;
2373
2374 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2375}
2376
2377static void
2378slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2379{
2380 if (items != 2)
2381 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2382
2383 frame->prepare = slf_prepare_transfer;
2384 frame->check = slf_check_nop;
2385 frame->data = (void *)arg; /* let's hope it will stay valid */
2386}
2387
2388static void
2389slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2390{
2391 frame->prepare = prepare_schedule;
2392 frame->check = slf_check_nop;
2393}
2394
2395static void
2396slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2397{
2398 struct coro *next = (struct coro *)slf_frame.data;
2399
2400 SvREFCNT_inc_NN (next->hv);
2401 prepare_schedule_to (aTHX_ ta, next);
2402}
2403
2404static void
2405slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2406{
2407 if (!items)
2408 croak ("Coro::schedule_to expects a coroutine argument, caught");
2409
2410 frame->data = (void *)SvSTATE (arg [0]);
2411 frame->prepare = slf_prepare_schedule_to;
2412 frame->check = slf_check_nop;
2413}
2414
2415static void
2416slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2417{
2418 api_ready (aTHX_ SvRV (coro_current));
2419
2420 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2421}
2422
2423static void
2424slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2425{
2426 frame->prepare = prepare_cede;
2427 frame->check = slf_check_nop;
2428}
2429
2430static void
2431slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 frame->prepare = prepare_cede_notself;
2434 frame->check = slf_check_nop;
2435}
2436
2437/*
2438 * these not obviously related functions are all rolled into one
2439 * function to increase chances that they all will call transfer with the same
2440 * stack offset
2441 * SLF stands for "schedule-like-function".
2442 */
2443static OP *
2444pp_slf (pTHX)
2445{
2446 I32 checkmark; /* mark SP to see how many elements check has pushed */
2447
2448 /* set up the slf frame, unless it has already been set-up */
2449 /* the latter happens when a new coro has been started */
2450 /* or when a new cctx was attached to an existing coroutine */
2451 if (expect_true (!slf_frame.prepare))
2452 {
2453 /* first iteration */
2454 dSP;
2455 SV **arg = PL_stack_base + TOPMARK + 1;
2456 int items = SP - arg; /* args without function object */
2457 SV *gv = *sp;
2458
2459 /* do a quick consistency check on the "function" object, and if it isn't */
2460 /* for us, divert to the real entersub */
2461 if (SvTYPE (gv) != SVt_PVGV
2462 || !GvCV (gv)
2463 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2464 return PL_ppaddr[OP_ENTERSUB](aTHX);
2465
2466 if (!(PL_op->op_flags & OPf_STACKED))
2467 {
2468 /* ampersand-form of call, use @_ instead of stack */
2469 AV *av = GvAV (PL_defgv);
2470 arg = AvARRAY (av);
2471 items = AvFILLp (av) + 1;
2472 }
2473
2474 /* now call the init function, which needs to set up slf_frame */
2475 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2476 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2477
2478 /* pop args */
2479 SP = PL_stack_base + POPMARK;
2480
2481 PUTBACK;
2482 }
2483
2484 /* now that we have a slf_frame, interpret it! */
2485 /* we use a callback system not to make the code needlessly */
2486 /* complicated, but so we can run multiple perl coros from one cctx */
2487
2488 do
2489 {
2490 struct coro_transfer_args ta;
2491
2492 slf_frame.prepare (aTHX_ &ta);
2493 TRANSFER (ta, 0);
2494
2495 checkmark = PL_stack_sp - PL_stack_base;
2496 }
2497 while (slf_frame.check (aTHX_ &slf_frame));
2498
2499 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2500
2501 /* exception handling */
2502 if (expect_false (CORO_THROW))
2503 {
2504 SV *exception = sv_2mortal (CORO_THROW);
2505
2506 CORO_THROW = 0;
2507 sv_setsv (ERRSV, exception);
2508 croak (0);
2509 }
2510
2511 /* return value handling - mostly like entersub */
2512 /* make sure we put something on the stack in scalar context */
2513 if (GIMME_V == G_SCALAR)
2514 {
2515 dSP;
2516 SV **bot = PL_stack_base + checkmark;
2517
2518 if (sp == bot) /* too few, push undef */
2519 bot [1] = &PL_sv_undef;
2520 else if (sp != bot + 1) /* too many, take last one */
2521 bot [1] = *sp;
2522
2523 SP = bot + 1;
2524
2525 PUTBACK;
2526 }
2527
2528 return NORMAL;
2529}
2530
2531static void
2532api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2533{
2534 int i;
2535 SV **arg = PL_stack_base + ax;
2536 int items = PL_stack_sp - arg + 1;
2537
2538 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2539
2540 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2541 && PL_op->op_ppaddr != pp_slf)
2542 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2543
2544 CvFLAGS (cv) |= CVf_SLF;
2545 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2546 slf_cv = cv;
2547
2548 /* we patch the op, and then re-run the whole call */
2549 /* we have to put the same argument on the stack for this to work */
2550 /* and this will be done by pp_restore */
2551 slf_restore.op_next = (OP *)&slf_restore;
2552 slf_restore.op_type = OP_CUSTOM;
2553 slf_restore.op_ppaddr = pp_restore;
2554 slf_restore.op_first = PL_op;
2555
2556 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2557
2558 if (PL_op->op_flags & OPf_STACKED)
2559 {
2560 if (items > slf_arga)
2561 {
2562 slf_arga = items;
2563 Safefree (slf_argv);
2564 New (0, slf_argv, slf_arga, SV *);
2565 }
2566
2567 slf_argc = items;
2568
2569 for (i = 0; i < items; ++i)
2570 slf_argv [i] = SvREFCNT_inc (arg [i]);
2571 }
2572 else
2573 slf_argc = 0;
2574
2575 PL_op->op_ppaddr = pp_slf;
2576 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2577
2578 PL_op = (OP *)&slf_restore;
2579}
2580
2581/*****************************************************************************/
2582/* dynamic wind */
2583
2584static void
2585on_enterleave_call (pTHX_ SV *cb)
2586{
2587 dSP;
2588
2589 PUSHSTACK;
2590
2591 PUSHMARK (SP);
2592 PUTBACK;
2593 call_sv (cb, G_VOID | G_DISCARD);
2594 SPAGAIN;
2595
2596 POPSTACK;
2597}
2598
2599static SV *
2600coro_avp_pop_and_free (pTHX_ AV **avp)
2601{
2602 AV *av = *avp;
2603 SV *res = av_pop (av);
2604
2605 if (AvFILLp (av) < 0)
2606 {
2607 *avp = 0;
2608 SvREFCNT_dec (av);
2609 }
2610
2611 return res;
2612}
2613
2614static void
2615coro_pop_on_enter (pTHX_ void *coro)
2616{
2617 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2618 SvREFCNT_dec (cb);
2619}
2620
2621static void
2622coro_pop_on_leave (pTHX_ void *coro)
2623{
2624 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2625 on_enterleave_call (aTHX_ sv_2mortal (cb));
2626}
2627
2628/*****************************************************************************/
2629/* PerlIO::cede */
2630
2631typedef struct
2632{
2633 PerlIOBuf base;
2634 NV next, every;
2635} PerlIOCede;
2636
2637static IV
2638PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2639{
2640 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2641
2642 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2643 self->next = nvtime () + self->every;
2644
2645 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2646}
2647
2648static SV *
2649PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2650{
2651 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2652
2653 return newSVnv (self->every);
2654}
2655
2656static IV
2657PerlIOCede_flush (pTHX_ PerlIO *f)
2658{
2659 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2660 double now = nvtime ();
2661
2662 if (now >= self->next)
2663 {
2664 api_cede (aTHX);
2665 self->next = now + self->every;
2666 }
2667
2668 return PerlIOBuf_flush (aTHX_ f);
2669}
2670
2671static PerlIO_funcs PerlIO_cede =
2672{
2673 sizeof(PerlIO_funcs),
2674 "cede",
2675 sizeof(PerlIOCede),
2676 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2677 PerlIOCede_pushed,
2678 PerlIOBuf_popped,
2679 PerlIOBuf_open,
2680 PerlIOBase_binmode,
2681 PerlIOCede_getarg,
2682 PerlIOBase_fileno,
2683 PerlIOBuf_dup,
2684 PerlIOBuf_read,
2685 PerlIOBuf_unread,
2686 PerlIOBuf_write,
2687 PerlIOBuf_seek,
2688 PerlIOBuf_tell,
2689 PerlIOBuf_close,
2690 PerlIOCede_flush,
2691 PerlIOBuf_fill,
2692 PerlIOBase_eof,
2693 PerlIOBase_error,
2694 PerlIOBase_clearerr,
2695 PerlIOBase_setlinebuf,
2696 PerlIOBuf_get_base,
2697 PerlIOBuf_bufsiz,
2698 PerlIOBuf_get_ptr,
2699 PerlIOBuf_get_cnt,
2700 PerlIOBuf_set_ptrcnt,
2701};
2702
2703/*****************************************************************************/
2704/* Coro::Semaphore & Coro::Signal */
2705
2706static SV *
2707coro_waitarray_new (pTHX_ int count)
2708{
2709 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2710 AV *av = newAV ();
2711 SV **ary;
2712
2713 /* unfortunately, building manually saves memory */
2714 Newx (ary, 2, SV *);
2715 AvALLOC (av) = ary;
2716#if PERL_VERSION_ATLEAST (5,10,0)
2717 AvARRAY (av) = ary;
2718#else
2719 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2720 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2721 SvPVX ((SV *)av) = (char *)ary;
2722#endif
2723 AvMAX (av) = 1;
2724 AvFILLp (av) = 0;
2725 ary [0] = newSViv (count);
2726
2727 return newRV_noinc ((SV *)av);
2728}
2729
2730/* semaphore */
2731
2732static void
2733coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2734{
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 count += adjust;
2739 SvIVX (count_sv) = count;
2740
2741 /* now wake up as many waiters as are expected to lock */
2742 while (count > 0 && AvFILLp (av) > 0)
2743 {
2744 SV *cb;
2745
2746 /* swap first two elements so we can shift a waiter */
2747 AvARRAY (av)[0] = AvARRAY (av)[1];
2748 AvARRAY (av)[1] = count_sv;
2749 cb = av_shift (av);
2750
2751 if (SvOBJECT (cb))
2752 {
2753 api_ready (aTHX_ cb);
2754 --count;
2755 }
2756 else if (SvTYPE (cb) == SVt_PVCV)
1102 { 2757 {
1103 dSP; 2758 dSP;
1104 UNLOCK;
1105
1106 ENTER;
1107 SAVETMPS;
1108
1109 PUSHMARK (SP); 2759 PUSHMARK (SP);
2760 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1110 PUTBACK; 2761 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2762 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1112
1113 FREETMPS;
1114 LEAVE;
1115 continue;
1116 } 2763 }
1117 2764
1118 ta->next = SvSTATE (next_sv); 2765 SvREFCNT_dec (cb);
2766 }
2767}
1119 2768
1120 /* cannot transfer to destroyed coros, skip and look for next */ 2769static void
1121 if (ta->next->flags & CF_DESTROYED) 2770coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2771{
2772 /* call $sem->adjust (0) to possibly wake up some other waiters */
2773 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2774}
2775
2776static int
2777slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2778{
2779 AV *av = (AV *)frame->data;
2780 SV *count_sv = AvARRAY (av)[0];
2781
2782 /* if we are about to throw, don't actually acquire the lock, just throw */
2783 if (CORO_THROW)
2784 return 0;
2785 else if (SvIVX (count_sv) > 0)
2786 {
2787 SvSTATE_current->on_destroy = 0;
2788
2789 if (acquire)
2790 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2791 else
2792 coro_semaphore_adjust (aTHX_ av, 0);
2793
2794 return 0;
2795 }
2796 else
2797 {
2798 int i;
2799 /* if we were woken up but can't down, we look through the whole */
2800 /* waiters list and only add us if we aren't in there already */
2801 /* this avoids some degenerate memory usage cases */
2802
2803 for (i = 1; i <= AvFILLp (av); ++i)
2804 if (AvARRAY (av)[i] == SvRV (coro_current))
2805 return 1;
2806
2807 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2808 return 1;
2809 }
2810}
2811
2812static int
2813slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2814{
2815 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2816}
2817
2818static int
2819slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2820{
2821 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2822}
2823
2824static void
2825slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2826{
2827 AV *av = (AV *)SvRV (arg [0]);
2828
2829 if (SvIVX (AvARRAY (av)[0]) > 0)
2830 {
2831 frame->data = (void *)av;
2832 frame->prepare = prepare_nop;
2833 }
2834 else
2835 {
2836 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2837
2838 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2839 frame->prepare = prepare_schedule;
2840
2841 /* to avoid race conditions when a woken-up coro gets terminated */
2842 /* we arrange for a temporary on_destroy that calls adjust (0) */
2843 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2844 }
2845}
2846
2847static void
2848slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2849{
2850 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2851 frame->check = slf_check_semaphore_down;
2852}
2853
2854static void
2855slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2856{
2857 if (items >= 2)
2858 {
2859 /* callback form */
2860 AV *av = (AV *)SvRV (arg [0]);
2861 SV *cb_cv = s_get_cv_croak (arg [1]);
2862
2863 av_push (av, SvREFCNT_inc_NN (cb_cv));
2864
2865 if (SvIVX (AvARRAY (av)[0]) > 0)
2866 coro_semaphore_adjust (aTHX_ av, 0);
2867
2868 frame->prepare = prepare_nop;
2869 frame->check = slf_check_nop;
2870 }
2871 else
2872 {
2873 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2874 frame->check = slf_check_semaphore_wait;
2875 }
2876}
2877
2878/* signal */
2879
2880static void
2881coro_signal_wake (pTHX_ AV *av, int count)
2882{
2883 SvIVX (AvARRAY (av)[0]) = 0;
2884
2885 /* now signal count waiters */
2886 while (count > 0 && AvFILLp (av) > 0)
2887 {
2888 SV *cb;
2889
2890 /* swap first two elements so we can shift a waiter */
2891 cb = AvARRAY (av)[0];
2892 AvARRAY (av)[0] = AvARRAY (av)[1];
2893 AvARRAY (av)[1] = cb;
2894
2895 cb = av_shift (av);
2896
2897 if (SvTYPE (cb) == SVt_PVCV)
1122 { 2898 {
2899 dSP;
2900 PUSHMARK (SP);
2901 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1123 UNLOCK; 2902 PUTBACK;
1124 SvREFCNT_dec (next_sv); 2903 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1125 /* coro_nready is already taken care of by destroy */
1126 continue;
1127 } 2904 }
2905 else
2906 {
2907 api_ready (aTHX_ cb);
2908 sv_setiv (cb, 0); /* signal waiter */
2909 }
1128 2910
1129 --coro_nready; 2911 SvREFCNT_dec (cb);
1130 UNLOCK;
1131 break;
1132 }
1133 2912
1134 /* free this only after the transfer */ 2913 --count;
1135 prev_sv = SvRV (coro_current); 2914 }
1136 SvRV_set (coro_current, next_sv);
1137 ta->prev = SvSTATE (prev_sv);
1138
1139 assert (ta->next->flags & CF_READY);
1140 ta->next->flags &= ~CF_READY;
1141
1142 LOCK;
1143 free_coro_mortal (aTHX);
1144 coro_mortal = prev_sv;
1145 UNLOCK;
1146}
1147
1148static void
1149prepare_cede (pTHX_ struct transfer_args *ta)
1150{
1151 api_ready (coro_current);
1152 prepare_schedule (aTHX_ ta);
1153} 2915}
1154 2916
1155static int 2917static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 2918slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1157{ 2919{
1158 if (coro_nready) 2920 /* if we are about to throw, also stop waiting */
2921 return SvROK ((SV *)frame->data) && !CORO_THROW;
2922}
2923
2924static void
2925slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2926{
2927 AV *av = (AV *)SvRV (arg [0]);
2928
2929 if (items >= 2)
2930 {
2931 SV *cb_cv = s_get_cv_croak (arg [1]);
2932 av_push (av, SvREFCNT_inc_NN (cb_cv));
2933
2934 if (SvIVX (AvARRAY (av)[0]))
2935 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2936
2937 frame->prepare = prepare_nop;
2938 frame->check = slf_check_nop;
1159 { 2939 }
1160 SV *prev = SvRV (coro_current); 2940 else if (SvIVX (AvARRAY (av)[0]))
1161 prepare_schedule (aTHX_ ta); 2941 {
1162 api_ready (prev); 2942 SvIVX (AvARRAY (av)[0]) = 0;
1163 return 1; 2943 frame->prepare = prepare_nop;
2944 frame->check = slf_check_nop;
1164 } 2945 }
1165 else 2946 else
2947 {
2948 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2949
2950 av_push (av, waiter);
2951
2952 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2953 frame->prepare = prepare_schedule;
2954 frame->check = slf_check_signal_wait;
2955 }
2956}
2957
2958/*****************************************************************************/
2959/* Coro::AIO */
2960
2961#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2962
2963/* helper storage struct */
2964struct io_state
2965{
2966 int errorno;
2967 I32 laststype; /* U16 in 5.10.0 */
2968 int laststatval;
2969 Stat_t statcache;
2970};
2971
2972static void
2973coro_aio_callback (pTHX_ CV *cv)
2974{
2975 dXSARGS;
2976 AV *state = (AV *)S_GENSUB_ARG;
2977 SV *coro = av_pop (state);
2978 SV *data_sv = newSV (sizeof (struct io_state));
2979
2980 av_extend (state, items - 1);
2981
2982 sv_upgrade (data_sv, SVt_PV);
2983 SvCUR_set (data_sv, sizeof (struct io_state));
2984 SvPOK_only (data_sv);
2985
2986 {
2987 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2988
2989 data->errorno = errno;
2990 data->laststype = PL_laststype;
2991 data->laststatval = PL_laststatval;
2992 data->statcache = PL_statcache;
2993 }
2994
2995 /* now build the result vector out of all the parameters and the data_sv */
2996 {
2997 int i;
2998
2999 for (i = 0; i < items; ++i)
3000 av_push (state, SvREFCNT_inc_NN (ST (i)));
3001 }
3002
3003 av_push (state, data_sv);
3004
3005 api_ready (aTHX_ coro);
3006 SvREFCNT_dec (coro);
3007 SvREFCNT_dec ((AV *)state);
3008}
3009
3010static int
3011slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3012{
3013 AV *state = (AV *)frame->data;
3014
3015 /* if we are about to throw, return early */
3016 /* this does not cancel the aio request, but at least */
3017 /* it quickly returns */
3018 if (CORO_THROW)
1166 return 0; 3019 return 0;
1167}
1168 3020
1169static void 3021 /* one element that is an RV? repeat! */
1170api_schedule (void) 3022 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1171{
1172 dTHX;
1173 struct transfer_args ta;
1174
1175 prepare_schedule (aTHX_ &ta);
1176 TRANSFER (ta);
1177}
1178
1179static int
1180api_cede (void)
1181{
1182 dTHX;
1183 struct transfer_args ta;
1184
1185 prepare_cede (aTHX_ &ta);
1186
1187 if (ta.prev != ta.next)
1188 {
1189 TRANSFER (ta);
1190 return 1; 3023 return 1;
3024
3025 /* restore status */
3026 {
3027 SV *data_sv = av_pop (state);
3028 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3029
3030 errno = data->errorno;
3031 PL_laststype = data->laststype;
3032 PL_laststatval = data->laststatval;
3033 PL_statcache = data->statcache;
3034
3035 SvREFCNT_dec (data_sv);
1191 } 3036 }
1192 else 3037
3038 /* push result values */
3039 {
3040 dSP;
3041 int i;
3042
3043 EXTEND (SP, AvFILLp (state) + 1);
3044 for (i = 0; i <= AvFILLp (state); ++i)
3045 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3046
3047 PUTBACK;
3048 }
3049
1193 return 0; 3050 return 0;
1194} 3051}
1195 3052
1196static int 3053static void
1197api_cede_notself (void) 3054slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1198{ 3055{
1199 dTHX; 3056 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1200 struct transfer_args ta; 3057 SV *coro_hv = SvRV (coro_current);
3058 struct coro *coro = SvSTATE_hv (coro_hv);
1201 3059
1202 if (prepare_cede_notself (aTHX_ &ta)) 3060 /* put our coroutine id on the state arg */
1203 { 3061 av_push (state, SvREFCNT_inc_NN (coro_hv));
1204 TRANSFER (ta); 3062
1205 return 1; 3063 /* first see whether we have a non-zero priority and set it as AIO prio */
3064 if (coro->prio)
1206 } 3065 {
1207 else 3066 dSP;
1208 return 0;
1209}
1210 3067
3068 static SV *prio_cv;
3069 static SV *prio_sv;
3070
3071 if (expect_false (!prio_cv))
3072 {
3073 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3074 prio_sv = newSViv (0);
3075 }
3076
3077 PUSHMARK (SP);
3078 sv_setiv (prio_sv, coro->prio);
3079 XPUSHs (prio_sv);
3080
3081 PUTBACK;
3082 call_sv (prio_cv, G_VOID | G_DISCARD);
3083 }
3084
3085 /* now call the original request */
3086 {
3087 dSP;
3088 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3089 int i;
3090
3091 PUSHMARK (SP);
3092
3093 /* first push all args to the stack */
3094 EXTEND (SP, items + 1);
3095
3096 for (i = 0; i < items; ++i)
3097 PUSHs (arg [i]);
3098
3099 /* now push the callback closure */
3100 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3101
3102 /* now call the AIO function - we assume our request is uncancelable */
3103 PUTBACK;
3104 call_sv ((SV *)req, G_VOID | G_DISCARD);
3105 }
3106
3107 /* now that the request is going, we loop till we have a result */
3108 frame->data = (void *)state;
3109 frame->prepare = prepare_schedule;
3110 frame->check = slf_check_aio_req;
3111}
3112
3113static void
3114coro_aio_req_xs (pTHX_ CV *cv)
3115{
3116 dXSARGS;
3117
3118 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3119
3120 XSRETURN_EMPTY;
3121}
3122
3123/*****************************************************************************/
3124
3125#if CORO_CLONE
3126# include "clone.c"
3127#endif
3128
3129/*****************************************************************************/
3130
3131static SV *
3132coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3133{
3134 SV *coro_sv;
3135 struct coro *coro;
3136 MAGIC *mg;
3137 HV *hv;
3138 SV *cb;
3139 int i;
3140
3141 if (argc > 0)
3142 {
3143 cb = s_get_cv_croak (argv [0]);
3144
3145 if (!is_coro)
3146 {
3147 if (CvISXSUB (cb))
3148 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3149
3150 if (!CvROOT (cb))
3151 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3152 }
3153 }
3154
3155 Newz (0, coro, 1, struct coro);
3156 coro->args = newAV ();
3157 coro->flags = CF_NEW;
3158
3159 if (coro_first) coro_first->prev = coro;
3160 coro->next = coro_first;
3161 coro_first = coro;
3162
3163 coro->hv = hv = newHV ();
3164 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3167
3168 if (argc > 0)
3169 {
3170 av_extend (coro->args, argc + is_coro - 1);
3171
3172 if (is_coro)
3173 {
3174 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3175 cb = (SV *)cv_coro_run;
3176 }
3177
3178 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3179
3180 for (i = 1; i < argc; i++)
3181 av_push (coro->args, newSVsv (argv [i]));
3182 }
3183
3184 return coro_sv;
3185}
3186
1211MODULE = Coro::State PACKAGE = Coro::State 3187MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 3188
1213PROTOTYPES: DISABLE 3189PROTOTYPES: DISABLE
1214 3190
1215BOOT: 3191BOOT:
1216{ 3192{
1217#ifdef USE_ITHREADS 3193#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 3194# if CORO_PTHREAD
3195 coro_thx = PERL_GET_CONTEXT;
3196# endif
1219#endif 3197#endif
1220 BOOT_PAGESIZE; 3198 BOOT_PAGESIZE;
1221 3199
3200 cctx_current = cctx_new_empty ();
3201
3202 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3203 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3204
3205 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3206 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3207 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3208
3209 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3210 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3211 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3212
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3213 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 3214
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3215 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3216 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1226 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1227 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1228 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1229 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3217 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3218 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 3219
1232 main_mainstack = PL_mainstack; 3220 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 3221 main_top_env = PL_top_env;
1234 3222
1235 while (main_top_env->je_prev) 3223 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 3224 main_top_env = main_top_env->je_prev;
1237 3225
3226 {
3227 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3228
3229 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3230 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3231
3232 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3233 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3234 }
3235
1238 coroapi.ver = CORO_API_VERSION; 3236 coroapi.ver = CORO_API_VERSION;
3237 coroapi.rev = CORO_API_REVISION;
3238
1239 coroapi.transfer = api_transfer; 3239 coroapi.transfer = api_transfer;
1240 3240
3241 coroapi.sv_state = SvSTATE_;
3242 coroapi.execute_slf = api_execute_slf;
3243 coroapi.prepare_nop = prepare_nop;
3244 coroapi.prepare_schedule = prepare_schedule;
3245 coroapi.prepare_cede = prepare_cede;
3246 coroapi.prepare_cede_notself = prepare_cede_notself;
3247
3248 time_init (aTHX);
3249
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3250 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1242} 3251}
1243 3252
1244SV * 3253SV *
1245new (char *klass, ...) 3254new (SV *klass, ...)
3255 ALIAS:
3256 Coro::new = 1
1246 CODE: 3257 CODE:
1247{ 3258 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1248 struct coro *coro;
1249 HV *hv;
1250 int i;
1251
1252 Newz (0, coro, 1, struct coro);
1253 coro->args = newAV ();
1254 coro->save = CORO_SAVE_DEF;
1255 coro->flags = CF_NEW;
1256
1257 if (coro_first) coro_first->prev = coro;
1258 coro->next = coro_first;
1259 coro_first = coro;
1260
1261 coro->hv = hv = newHV ();
1262 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1263 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264
1265 for (i = 1; i < items; i++)
1266 av_push (coro->args, newSVsv (ST (i)));
1267}
1268 OUTPUT:
1269 RETVAL
1270
1271int
1272save (SV *coro, int new_save = -1)
1273 CODE:
1274 RETVAL = api_save (coro, new_save);
1275 OUTPUT: 3259 OUTPUT:
1276 RETVAL 3260 RETVAL
1277 3261
1278int 3262void
1279save_also (SV *coro_sv, int save_also) 3263transfer (...)
3264 PROTOTYPE: $$
1280 CODE: 3265 CODE:
1281{ 3266 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1282 struct coro *coro = SvSTATE (coro_sv);
1283 RETVAL = coro->save;
1284 coro->save |= save_also;
1285}
1286 OUTPUT:
1287 RETVAL
1288 3267
1289void 3268void
1290_set_stacklevel (...)
1291 ALIAS:
1292 Coro::State::transfer = 1
1293 Coro::schedule = 2
1294 Coro::cede = 3
1295 Coro::cede_notself = 4
1296 CODE:
1297{
1298 struct transfer_args ta;
1299
1300 switch (ix)
1301 {
1302 case 0:
1303 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1304 ta.next = 0;
1305 break;
1306
1307 case 1:
1308 if (items != 2)
1309 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1310
1311 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1312 break;
1313
1314 case 2:
1315 prepare_schedule (aTHX_ &ta);
1316 break;
1317
1318 case 3:
1319 prepare_cede (aTHX_ &ta);
1320 break;
1321
1322 case 4:
1323 if (!prepare_cede_notself (aTHX_ &ta))
1324 XSRETURN_EMPTY;
1325
1326 break;
1327 }
1328
1329 BARRIER;
1330 TRANSFER (ta);
1331
1332 if (GIMME_V != G_VOID && ta.next != ta.prev)
1333 XSRETURN_YES;
1334}
1335
1336bool
1337_destroy (SV *coro_sv)
1338 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT:
1341 RETVAL
1342
1343void
1344_exit (code) 3269_exit (int code)
1345 int code
1346 PROTOTYPE: $ 3270 PROTOTYPE: $
1347 CODE: 3271 CODE:
1348 _exit (code); 3272 _exit (code);
1349 3273
3274SV *
3275clone (Coro::State coro)
3276 CODE:
3277{
3278#if CORO_CLONE
3279 struct coro *ncoro = coro_clone (aTHX_ coro);
3280 MAGIC *mg;
3281 /* TODO: too much duplication */
3282 ncoro->hv = newHV ();
3283 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3284 mg->mg_flags |= MGf_DUP;
3285 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3286#else
3287 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3288#endif
3289}
3290 OUTPUT:
3291 RETVAL
3292
1350int 3293int
1351cctx_stacksize (int new_stacksize = 0) 3294cctx_stacksize (int new_stacksize = 0)
3295 PROTOTYPE: ;$
1352 CODE: 3296 CODE:
1353 RETVAL = coro_stacksize; 3297 RETVAL = cctx_stacksize;
1354 if (new_stacksize) 3298 if (new_stacksize)
3299 {
1355 coro_stacksize = new_stacksize; 3300 cctx_stacksize = new_stacksize;
3301 ++cctx_gen;
3302 }
1356 OUTPUT: 3303 OUTPUT:
1357 RETVAL 3304 RETVAL
1358 3305
1359int 3306int
3307cctx_max_idle (int max_idle = 0)
3308 PROTOTYPE: ;$
3309 CODE:
3310 RETVAL = cctx_max_idle;
3311 if (max_idle > 1)
3312 cctx_max_idle = max_idle;
3313 OUTPUT:
3314 RETVAL
3315
3316int
1360cctx_count () 3317cctx_count ()
3318 PROTOTYPE:
1361 CODE: 3319 CODE:
1362 RETVAL = cctx_count; 3320 RETVAL = cctx_count;
1363 OUTPUT: 3321 OUTPUT:
1364 RETVAL 3322 RETVAL
1365 3323
1366int 3324int
1367cctx_idle () 3325cctx_idle ()
3326 PROTOTYPE:
1368 CODE: 3327 CODE:
1369 RETVAL = cctx_idle; 3328 RETVAL = cctx_idle;
1370 OUTPUT: 3329 OUTPUT:
1371 RETVAL 3330 RETVAL
1372 3331
1373void 3332void
1374list () 3333list ()
3334 PROTOTYPE:
1375 PPCODE: 3335 PPCODE:
1376{ 3336{
1377 struct coro *coro; 3337 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 3338 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 3339 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3340 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 3341}
1382 3342
1383void 3343void
1384_eval (Coro::State coro, SV *coderef) 3344call (Coro::State coro, SV *coderef)
3345 ALIAS:
3346 eval = 1
1385 CODE: 3347 CODE:
1386{ 3348{
1387 if (coro->mainstack) 3349 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1388 { 3350 {
1389 struct coro temp; 3351 struct coro *current = SvSTATE_current;
1390 Zero (&temp, 1, struct coro); 3352 struct CoroSLF slf_save;
1391 temp.save = CORO_SAVE_ALL;
1392 3353
1393 if (!(coro->flags & CF_RUNNING)) 3354 if (current != coro)
1394 { 3355 {
3356 PUTBACK;
1395 save_perl (aTHX_ &temp); 3357 save_perl (aTHX_ current);
1396 load_perl (aTHX_ coro); 3358 load_perl (aTHX_ coro);
3359 /* the coro is most likely in an active SLF call.
3360 * while not strictly required (the code we execute is
3361 * not allowed to call any SLF functions), it's cleaner
3362 * to reinitialise the slf_frame and restore it later.
3363 * This might one day allow us to actually do SLF calls
3364 * from code executed here.
3365 */
3366 slf_save = slf_frame;
3367 slf_frame.prepare = 0;
3368 SPAGAIN;
1397 } 3369 }
1398 3370
1399 { 3371 PUSHSTACK;
1400 dSP; 3372
1401 ENTER;
1402 SAVETMPS;
1403 PUSHMARK (SP); 3373 PUSHMARK (SP);
1404 PUTBACK; 3374 PUTBACK;
3375
3376 if (ix)
3377 eval_sv (coderef, 0);
3378 else
1405 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3379 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3380
3381 POPSTACK;
1406 SPAGAIN; 3382 SPAGAIN;
1407 FREETMPS;
1408 LEAVE;
1409 PUTBACK;
1410 }
1411 3383
1412 if (!(coro->flags & CF_RUNNING)) 3384 if (current != coro)
1413 { 3385 {
3386 PUTBACK;
3387 slf_frame = slf_save;
1414 save_perl (aTHX_ coro); 3388 save_perl (aTHX_ coro);
1415 load_perl (aTHX_ &temp); 3389 load_perl (aTHX_ current);
3390 SPAGAIN;
1416 } 3391 }
1417 } 3392 }
1418} 3393}
1419 3394
1420SV * 3395SV *
1421is_ready (Coro::State coro) 3396is_ready (Coro::State coro)
1422 PROTOTYPE: $ 3397 PROTOTYPE: $
1423 ALIAS: 3398 ALIAS:
1424 is_ready = CF_READY 3399 is_ready = CF_READY
1425 is_running = CF_RUNNING 3400 is_running = CF_RUNNING
1426 is_new = CF_NEW 3401 is_new = CF_NEW
1427 is_destroyed = CF_DESTROYED 3402 is_destroyed = CF_DESTROYED
3403 is_suspended = CF_SUSPENDED
1428 CODE: 3404 CODE:
1429 RETVAL = boolSV (coro->flags & ix); 3405 RETVAL = boolSV (coro->flags & ix);
1430 OUTPUT: 3406 OUTPUT:
1431 RETVAL 3407 RETVAL
1432 3408
3409void
3410throw (Coro::State self, SV *exception = &PL_sv_undef)
3411 PROTOTYPE: $;$
3412 CODE:
3413{
3414 struct coro *current = SvSTATE_current;
3415 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3416 SvREFCNT_dec (*exceptionp);
3417 SvGETMAGIC (exception);
3418 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3419}
3420
3421void
3422api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3423 PROTOTYPE: $;$
3424 C_ARGS: aTHX_ coro, flags
3425
1433SV * 3426SV *
1434has_stack (Coro::State coro) 3427has_cctx (Coro::State coro)
1435 PROTOTYPE: $ 3428 PROTOTYPE: $
1436 CODE: 3429 CODE:
1437 RETVAL = boolSV (!!coro->cctx); 3430 /* maybe manage the running flag differently */
3431 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1438 OUTPUT: 3432 OUTPUT:
1439 RETVAL 3433 RETVAL
1440 3434
1441IV 3435int
3436is_traced (Coro::State coro)
3437 PROTOTYPE: $
3438 CODE:
3439 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3440 OUTPUT:
3441 RETVAL
3442
3443UV
1442rss (Coro::State coro) 3444rss (Coro::State coro)
1443 PROTOTYPE: $ 3445 PROTOTYPE: $
3446 ALIAS:
3447 usecount = 1
1444 CODE: 3448 CODE:
1445 RETVAL = coro_rss (coro); 3449 switch (ix)
3450 {
3451 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3452 case 1: RETVAL = coro->usecount; break;
3453 }
1446 OUTPUT: 3454 OUTPUT:
1447 RETVAL 3455 RETVAL
1448 3456
3457void
3458force_cctx ()
3459 PROTOTYPE:
3460 CODE:
3461 cctx_current->idle_sp = 0;
3462
3463void
3464swap_defsv (Coro::State self)
3465 PROTOTYPE: $
3466 ALIAS:
3467 swap_defav = 1
3468 CODE:
3469 if (!self->slot)
3470 croak ("cannot swap state with coroutine that has no saved state,");
3471 else
3472 {
3473 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3474 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3475
3476 SV *tmp = *src; *src = *dst; *dst = tmp;
3477 }
3478
3479void
3480cancel (Coro::State self)
3481 CODE:
3482 coro_state_destroy (aTHX_ self);
3483
3484SV *
3485enable_times (int enabled = enable_times)
3486 CODE:
3487{
3488 RETVAL = boolSV (enable_times);
3489
3490 if (enabled != enable_times)
3491 {
3492 enable_times = enabled;
3493
3494 coro_times_update ();
3495 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3496 }
3497}
3498 OUTPUT:
3499 RETVAL
3500
3501void
3502times (Coro::State self)
3503 PPCODE:
3504{
3505 struct coro *current = SvSTATE (coro_current);
3506
3507 if (expect_false (current == self))
3508 {
3509 coro_times_update ();
3510 coro_times_add (SvSTATE (coro_current));
3511 }
3512
3513 EXTEND (SP, 2);
3514 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3515 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3516
3517 if (expect_false (current == self))
3518 coro_times_sub (SvSTATE (coro_current));
3519}
3520
3521void
3522swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3523 CODE:
3524{
3525 struct coro *current = SvSTATE_current;
3526
3527 if (current == coro)
3528 SWAP_SVS (current);
3529
3530 if (!coro->swap_sv)
3531 coro->swap_sv = newAV ();
3532
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3534 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3535
3536 if (current == coro)
3537 SWAP_SVS (current);
3538}
3539
1449 3540
1450MODULE = Coro::State PACKAGE = Coro 3541MODULE = Coro::State PACKAGE = Coro
1451 3542
1452BOOT: 3543BOOT:
1453{ 3544{
1454 int i;
1455
1456 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3545 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1457 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3546 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3547 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3548 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3549 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1458 av_async_pool = get_av ("Coro::async_pool", TRUE); 3550 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3551 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3552 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3553 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1459 3554
1460 coro_current = get_sv ("Coro::current", FALSE); 3555 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1461 SvREADONLY_on (coro_current); 3556 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1462 3557 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3558 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3559
1463 coro_stash = gv_stashpv ("Coro", TRUE); 3560 coro_stash = gv_stashpv ("Coro", TRUE);
1464 3561
1465 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3562 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1466 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3563 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1467 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3564 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1468 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3565 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1469 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3566 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1470 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3567 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1471
1472 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1473 coro_ready[i] = newAV ();
1474 3568
1475 { 3569 {
1476 SV *sv = perl_get_sv("Coro::API", 1); 3570 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1477 3571
1478 coroapi.schedule = api_schedule; 3572 coroapi.schedule = api_schedule;
1479 coroapi.save = api_save; 3573 coroapi.schedule_to = api_schedule_to;
1480 coroapi.cede = api_cede; 3574 coroapi.cede = api_cede;
1481 coroapi.cede_notself = api_cede_notself; 3575 coroapi.cede_notself = api_cede_notself;
1482 coroapi.ready = api_ready; 3576 coroapi.ready = api_ready;
1483 coroapi.is_ready = api_is_ready; 3577 coroapi.is_ready = api_is_ready;
1484 coroapi.nready = &coro_nready; 3578 coroapi.nready = coro_nready;
1485 coroapi.current = coro_current; 3579 coroapi.current = coro_current;
1486 3580
1487 GCoroAPI = &coroapi; 3581 /*GCoroAPI = &coroapi;*/
1488 sv_setiv (sv, (IV)&coroapi); 3582 sv_setiv (sv, (IV)&coroapi);
1489 SvREADONLY_on (sv); 3583 SvREADONLY_on (sv);
1490 } 3584 }
1491} 3585}
3586
3587SV *
3588async (...)
3589 PROTOTYPE: &@
3590 CODE:
3591 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3592 api_ready (aTHX_ RETVAL);
3593 OUTPUT:
3594 RETVAL
3595
3596void
3597_destroy (Coro::State coro)
3598 CODE:
3599 /* used by the manager thread */
3600 coro_state_destroy (aTHX_ coro);
3601 coro_call_on_destroy (aTHX_ coro);
3602
3603void
3604terminate (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3607
3608void
3609cancel (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3612
3613void
3614schedule (...)
3615 CODE:
3616 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3617
3618void
3619schedule_to (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3622
3623void
3624cede_to (...)
3625 CODE:
3626 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3627
3628void
3629cede (...)
3630 CODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_cede);
3632
3633void
3634cede_notself (...)
3635 CODE:
3636 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1492 3637
1493void 3638void
1494_set_current (SV *current) 3639_set_current (SV *current)
1495 PROTOTYPE: $ 3640 PROTOTYPE: $
1496 CODE: 3641 CODE:
1497 SvREFCNT_dec (SvRV (coro_current)); 3642 SvREFCNT_dec (SvRV (coro_current));
1498 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3643 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3644
3645void
3646_set_readyhook (SV *hook)
3647 PROTOTYPE: $
3648 CODE:
3649 SvREFCNT_dec (coro_readyhook);
3650 SvGETMAGIC (hook);
3651 if (SvOK (hook))
3652 {
3653 coro_readyhook = newSVsv (hook);
3654 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3655 }
3656 else
3657 {
3658 coro_readyhook = 0;
3659 CORO_READYHOOK = 0;
3660 }
1499 3661
1500int 3662int
1501prio (Coro::State coro, int newprio = 0) 3663prio (Coro::State coro, int newprio = 0)
3664 PROTOTYPE: $;$
1502 ALIAS: 3665 ALIAS:
1503 nice = 1 3666 nice = 1
1504 CODE: 3667 CODE:
1505{ 3668{
1506 RETVAL = coro->prio; 3669 RETVAL = coro->prio;
… …
1508 if (items > 1) 3671 if (items > 1)
1509 { 3672 {
1510 if (ix) 3673 if (ix)
1511 newprio = coro->prio - newprio; 3674 newprio = coro->prio - newprio;
1512 3675
1513 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3676 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1514 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3677 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1515 3678
1516 coro->prio = newprio; 3679 coro->prio = newprio;
1517 } 3680 }
1518} 3681}
1519 OUTPUT: 3682 OUTPUT:
… …
1521 3684
1522SV * 3685SV *
1523ready (SV *self) 3686ready (SV *self)
1524 PROTOTYPE: $ 3687 PROTOTYPE: $
1525 CODE: 3688 CODE:
1526 RETVAL = boolSV (api_ready (self)); 3689 RETVAL = boolSV (api_ready (aTHX_ self));
1527 OUTPUT: 3690 OUTPUT:
1528 RETVAL 3691 RETVAL
1529 3692
1530int 3693int
1531nready (...) 3694nready (...)
… …
1533 CODE: 3696 CODE:
1534 RETVAL = coro_nready; 3697 RETVAL = coro_nready;
1535 OUTPUT: 3698 OUTPUT:
1536 RETVAL 3699 RETVAL
1537 3700
1538# for async_pool speedup
1539void 3701void
1540_pool_1 (SV *cb) 3702suspend (Coro::State self)
3703 PROTOTYPE: $
1541 CODE: 3704 CODE:
1542{ 3705 self->flags |= CF_SUSPENDED;
1543 int i, len;
1544 HV *hv = (HV *)SvRV (coro_current);
1545 AV *defav = GvAV (PL_defgv);
1546 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1547 AV *invoke_av;
1548 3706
1549 if (!invoke) 3707void
1550 croak ("\3terminate\2\n"); 3708resume (Coro::State self)
3709 PROTOTYPE: $
3710 CODE:
3711 self->flags &= ~CF_SUSPENDED;
1551 3712
1552 hv_store (hv, "desc", sizeof ("desc") - 1, 3713void
1553 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3714_pool_handler (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1554 3717
1555 invoke_av = (AV *)SvRV (invoke); 3718void
1556 len = av_len (invoke_av); 3719async_pool (SV *cv, ...)
3720 PROTOTYPE: &@
3721 PPCODE:
3722{
3723 HV *hv = (HV *)av_pop (av_async_pool);
3724 AV *av = newAV ();
3725 SV *cb = ST (0);
3726 int i;
1557 3727
1558 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3728 av_extend (av, items - 2);
3729 for (i = 1; i < items; ++i)
3730 av_push (av, SvREFCNT_inc_NN (ST (i)));
1559 3731
1560 if (len > 0) 3732 if ((SV *)hv == &PL_sv_undef)
1561 { 3733 {
1562 av_fill (defav, len - 1); 3734 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1563 for (i = 0; i < len; ++i) 3735 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1564 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3736 SvREFCNT_dec (sv);
1565 } 3737 }
1566 3738
3739 {
3740 struct coro *coro = SvSTATE_hv (hv);
3741
3742 assert (!coro->invoke_cb);
3743 assert (!coro->invoke_av);
3744 coro->invoke_cb = SvREFCNT_inc (cb);
3745 coro->invoke_av = av;
3746 }
3747
3748 api_ready (aTHX_ (SV *)hv);
3749
3750 if (GIMME_V != G_VOID)
3751 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3752 else
1567 SvREFCNT_dec (invoke); 3753 SvREFCNT_dec (hv);
1568} 3754}
1569 3755
1570void 3756SV *
1571_pool_2 (SV *cb) 3757rouse_cb ()
3758 PROTOTYPE:
1572 CODE: 3759 CODE:
1573{ 3760 RETVAL = coro_new_rouse_cb (aTHX);
1574 struct coro *coro = SvSTATE (coro_current);
1575
1576 sv_setsv (cb, &PL_sv_undef);
1577
1578 if (coro_rss (coro) > SvIV (sv_pool_rss)
1579 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1580 croak ("\3terminate\2\n");
1581
1582 av_clear (GvAV (PL_defgv));
1583 hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1,
1584 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1585 coro->save = CORO_SAVE_DEF;
1586 coro->prio = 0;
1587 av_push (av_async_pool, newSVsv (coro_current));
1588}
1589
1590
1591MODULE = Coro::State PACKAGE = Coro::AIO
1592
1593SV *
1594_get_state ()
1595 CODE:
1596{
1597 struct io_state *data;
1598
1599 RETVAL = newSV (sizeof (struct io_state));
1600 data = (struct io_state *)SvPVX (RETVAL);
1601 SvCUR_set (RETVAL, sizeof (struct io_state));
1602 SvPOK_only (RETVAL);
1603
1604 data->errorno = errno;
1605 data->laststype = PL_laststype;
1606 data->laststatval = PL_laststatval;
1607 data->statcache = PL_statcache;
1608}
1609 OUTPUT: 3761 OUTPUT:
1610 RETVAL 3762 RETVAL
1611 3763
1612void 3764void
1613_set_state (char *data_) 3765rouse_wait (...)
3766 PROTOTYPE: ;$
3767 PPCODE:
3768 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3769
3770void
3771on_enter (SV *block)
3772 ALIAS:
3773 on_leave = 1
1614 PROTOTYPE: $ 3774 PROTOTYPE: &
1615 CODE: 3775 CODE:
1616{ 3776{
1617 struct io_state *data = (void *)data_; 3777 struct coro *coro = SvSTATE_current;
3778 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1618 3779
1619 errno = data->errorno; 3780 block = s_get_cv_croak (block);
1620 PL_laststype = data->laststype;
1621 PL_laststatval = data->laststatval;
1622 PL_statcache = data->statcache;
1623}
1624 3781
3782 if (!*avp)
3783 *avp = newAV ();
3784
3785 av_push (*avp, SvREFCNT_inc (block));
3786
3787 if (!ix)
3788 on_enterleave_call (aTHX_ block);
3789
3790 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3791 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3792 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3793}
3794
3795
3796MODULE = Coro::State PACKAGE = PerlIO::cede
3797
3798BOOT:
3799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3800
3801
3802MODULE = Coro::State PACKAGE = Coro::Semaphore
3803
3804SV *
3805new (SV *klass, SV *count = 0)
3806 CODE:
3807{
3808 int semcnt = 1;
3809
3810 if (count)
3811 {
3812 SvGETMAGIC (count);
3813
3814 if (SvOK (count))
3815 semcnt = SvIV (count);
3816 }
3817
3818 RETVAL = sv_bless (
3819 coro_waitarray_new (aTHX_ semcnt),
3820 GvSTASH (CvGV (cv))
3821 );
3822}
3823 OUTPUT:
3824 RETVAL
3825
3826# helper for Coro::Channel and others
3827SV *
3828_alloc (int count)
3829 CODE:
3830 RETVAL = coro_waitarray_new (aTHX_ count);
3831 OUTPUT:
3832 RETVAL
3833
3834SV *
3835count (SV *self)
3836 CODE:
3837 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3838 OUTPUT:
3839 RETVAL
3840
3841void
3842up (SV *self, int adjust = 1)
3843 ALIAS:
3844 adjust = 1
3845 CODE:
3846 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3847
3848void
3849down (...)
3850 CODE:
3851 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3852
3853void
3854wait (...)
3855 CODE:
3856 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3857
3858void
3859try (SV *self)
3860 PPCODE:
3861{
3862 AV *av = (AV *)SvRV (self);
3863 SV *count_sv = AvARRAY (av)[0];
3864 IV count = SvIVX (count_sv);
3865
3866 if (count > 0)
3867 {
3868 --count;
3869 SvIVX (count_sv) = count;
3870 XSRETURN_YES;
3871 }
3872 else
3873 XSRETURN_NO;
3874}
3875
3876void
3877waiters (SV *self)
3878 PPCODE:
3879{
3880 AV *av = (AV *)SvRV (self);
3881 int wcount = AvFILLp (av) + 1 - 1;
3882
3883 if (GIMME_V == G_SCALAR)
3884 XPUSHs (sv_2mortal (newSViv (wcount)));
3885 else
3886 {
3887 int i;
3888 EXTEND (SP, wcount);
3889 for (i = 1; i <= wcount; ++i)
3890 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3891 }
3892}
3893
3894MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3895
3896void
3897_may_delete (SV *sem, int count, int extra_refs)
3898 PPCODE:
3899{
3900 AV *av = (AV *)SvRV (sem);
3901
3902 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3903 && AvFILLp (av) == 0 /* no waiters, just count */
3904 && SvIV (AvARRAY (av)[0]) == count)
3905 XSRETURN_YES;
3906
3907 XSRETURN_NO;
3908}
3909
3910MODULE = Coro::State PACKAGE = Coro::Signal
3911
3912SV *
3913new (SV *klass)
3914 CODE:
3915 RETVAL = sv_bless (
3916 coro_waitarray_new (aTHX_ 0),
3917 GvSTASH (CvGV (cv))
3918 );
3919 OUTPUT:
3920 RETVAL
3921
3922void
3923wait (...)
3924 CODE:
3925 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3926
3927void
3928broadcast (SV *self)
3929 CODE:
3930{
3931 AV *av = (AV *)SvRV (self);
3932 coro_signal_wake (aTHX_ av, AvFILLp (av));
3933}
3934
3935void
3936send (SV *self)
3937 CODE:
3938{
3939 AV *av = (AV *)SvRV (self);
3940
3941 if (AvFILLp (av))
3942 coro_signal_wake (aTHX_ av, 1);
3943 else
3944 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3945}
3946
3947IV
3948awaited (SV *self)
3949 CODE:
3950 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3951 OUTPUT:
3952 RETVAL
3953
3954
3955MODULE = Coro::State PACKAGE = Coro::AnyEvent
3956
3957BOOT:
3958 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3959
3960void
3961_schedule (...)
3962 CODE:
3963{
3964 static int incede;
3965
3966 api_cede_notself (aTHX);
3967
3968 ++incede;
3969 while (coro_nready >= incede && api_cede (aTHX))
3970 ;
3971
3972 sv_setsv (sv_activity, &PL_sv_undef);
3973 if (coro_nready >= incede)
3974 {
3975 PUSHMARK (SP);
3976 PUTBACK;
3977 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3978 }
3979
3980 --incede;
3981}
3982
3983
3984MODULE = Coro::State PACKAGE = Coro::AIO
3985
3986void
3987_register (char *target, char *proto, SV *req)
3988 CODE:
3989{
3990 SV *req_cv = s_get_cv_croak (req);
3991 /* newXSproto doesn't return the CV on 5.8 */
3992 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3993 sv_setpv ((SV *)slf_cv, proto);
3994 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3995}
3996
3997MODULE = Coro::State PACKAGE = Coro::Select
3998
3999void
4000patch_pp_sselect ()
4001 CODE:
4002 if (!coro_old_pp_sselect)
4003 {
4004 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4005 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4006 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4007 }
4008
4009void
4010unpatch_pp_sselect ()
4011 CODE:
4012 if (coro_old_pp_sselect)
4013 {
4014 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4015 coro_old_pp_sselect = 0;
4016 }
4017

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