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Comparing Coro/Coro/State.xs (file contents):
Revision 1.189 by root, Fri Oct 5 20:38:43 2007 UTC vs.
Revision 1.393 by root, Fri Apr 29 17:38:56 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 */
136 143
137static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
138static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
139 149
140/* async_pool helper stuff */ 150/* async_pool helper stuff */
141static SV *sv_pool_rss; 151static SV *sv_pool_rss;
142static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
143static 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;
144 166
145static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
146static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
147 169
148enum { 170enum {
… …
153 CC_TRACE_LINE = 0x10, /* trace each statement */ 175 CC_TRACE_LINE = 0x10, /* trace each statement */
154 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
155}; 177};
156 178
157/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
158typedef struct coro_cctx { 180typedef struct coro_cctx
181{
159 struct coro_cctx *next; 182 struct coro_cctx *next;
160 183
161 /* the stack */ 184 /* the stack */
162 void *sptr; 185 void *sptr;
163 size_t ssize; 186 size_t ssize;
… …
166 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
167 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 */
168 JMPENV *top_env; 191 JMPENV *top_env;
169 coro_context cctx; 192 coro_context cctx;
170 193
194 U32 gen;
171#if CORO_USE_VALGRIND 195#if CORO_USE_VALGRIND
172 int valgrind_id; 196 int valgrind_id;
173#endif 197#endif
174 unsigned char flags; 198 unsigned char flags;
175} coro_cctx; 199} coro_cctx;
176 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
177enum { 205enum {
178 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
179 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
180 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
181 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) */
182}; 212};
183 213
184/* this is a structure representing a perl-level coroutine */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
185struct coro { 215typedef struct
186 /* the c coroutine allocated to this perl coroutine, if any */ 216{
187 coro_cctx *cctx; 217 SV *defsv;
188 218 AV *defav;
189 /* data associated with this coroutine (initial args) */ 219 SV *errsv;
190 AV *args; 220 SV *irsgv;
191 int refcnt; 221 HV *hinthv;
192 int flags; /* CF_ flags */
193
194 /* optionally saved, might be zero */
195 AV *defav; /* @_ */
196 SV *defsv; /* $_ */
197 SV *errsv; /* $@ */
198 SV *deffh; /* default filehandle */
199 SV *irssv; /* $/ */
200 SV *irssv_sv; /* real $/ cache */
201
202#define VAR(name,type) type name; 222#define VAR(name,type) type name;
203# include "state.h" 223# include "state.h"
204#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 */
205 248
206 /* statistics */ 249 /* statistics */
207 int usecount; /* number of transfers to this coro */ 250 int usecount; /* number of transfers to this coro */
208 251
209 /* coro process data */ 252 /* coro process data */
210 int prio; 253 int prio;
211 //SV *throw; 254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
212 256
213 /* async_pool */ 257 /* async_pool */
214 SV *saved_deffh; 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;
215 271
216 /* linked list */ 272 /* linked list */
217 struct coro *next, *prev; 273 struct coro *next, *prev;
218 HV *hv; /* the perl hash associated with this coro, if any */
219}; 274};
220 275
221typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
222typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
223 278
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
224/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
225 285
226#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
227#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
228#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
229#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
230#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
231#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
232 292
233/* for Coro.pm */ 293/* for Coro.pm */
234static SV *coro_current; 294static SV *coro_current;
235static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 295static SV *coro_readyhook;
236static 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;
237static 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
238 372
239/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
240 374
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
241static 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 *
242coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
243{ 506{
244 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
245 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
246 509
247 newpadlist = newAV (); 510 newpadlist = newAV ();
248 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
249#if PERL_VERSION_ATLEAST (5,9,0) 512#if PERL_VERSION_ATLEAST (5,10,0)
250 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
251#else 514#else
252 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
253#endif 516#endif
254 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
255 --AvFILLp (padlist); 518 --AvFILLp (padlist);
256 519
257 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
258 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
259 522
260 return newpadlist; 523 return newpadlist;
261} 524}
262 525
263static void 526static void
264free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
265{ 528{
266 /* may be during global destruction */ 529 /* may be during global destruction */
267 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
268 { 531 {
269 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
270 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
271 { 535 {
272 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
273 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
274 { 538 I32 j = AvFILLp (av);
275 SV *sv; 539
276 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
277 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
278
279 SvREFCNT_dec (*svp);
280 }
281 } 545 }
282 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
283 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
284 } 551 }
285} 552}
286 553
287static int 554static int
288coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
289{ 556{
290 AV *padlist; 557 AV *padlist;
291 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;
292 563
293 /* casting is fun. */ 564 /* casting is fun. */
294 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
295 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
296 567
297 SvREFCNT_dec (av); 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
298 569
299 return 0; 570 return 0;
300} 571}
301 572
302#define PERL_MAGIC_coro PERL_MAGIC_ext 573static MGVTBL coro_cv_vtbl = {
303 574 0, 0, 0, 0,
304static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 575 coro_cv_free
305 576};
306#define CORO_MAGIC(cv) \
307 SvMAGIC (cv) \
308 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
309 ? SvMAGIC (cv) \
310 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
311 : 0
312
313static struct coro *
314SvSTATE_ (pTHX_ SV *coro)
315{
316 HV *stash;
317 MAGIC *mg;
318
319 if (SvROK (coro))
320 coro = SvRV (coro);
321
322 if (SvTYPE (coro) != SVt_PVHV)
323 croak ("Coro::State object required");
324
325 stash = SvSTASH (coro);
326 if (stash != coro_stash && stash != coro_state_stash)
327 {
328 /* very slow, but rare, check */
329 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
330 croak ("Coro::State object required");
331 }
332
333 mg = CORO_MAGIC (coro);
334 return (struct coro *)mg->mg_ptr;
335}
336
337#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
338 577
339/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
340static void 579static void
341get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
342{ 581{
343 MAGIC *mg = CORO_MAGIC (cv); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
344 AV *av; 583 AV *av;
345 584
346 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
347 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
348 else 587 else
349 { 588 {
350#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
351 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
352 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
353 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
354 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
355 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
356#else 596#else
357 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
358#endif 598#endif
359 } 599 }
360} 600}
361 601
362static void 602static void
363put_padlist (pTHX_ CV *cv) 603put_padlist (pTHX_ CV *cv)
364{ 604{
365 MAGIC *mg = CORO_MAGIC (cv); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
366 AV *av; 606 AV *av;
367 607
368 if (!mg) 608 if (expect_false (!mg))
369 { 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
370 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
371 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
372 mg->mg_virtual = &vtbl_coro;
373 mg->mg_obj = (SV *)newAV ();
374 }
375 610
376 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
377 612
378 if (AvFILLp (av) >= AvMAX (av)) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
379 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
380 615
381 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
382} 617}
383 618
384/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
385 620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
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);
674
386static void 675static void
387load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
388{ 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
389#define VAR(name,type) PL_ ## name = c->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
390# include "state.h" 690 # include "state.h"
391#undef VAR 691 #undef VAR
392
393 GvSV (PL_defgv) = c->defsv;
394 GvAV (PL_defgv) = c->defav;
395 GvSV (PL_errgv) = c->errsv;
396 GvSV (irsgv) = c->irssv_sv;
397 692
398 { 693 {
399 dSP; 694 dSP;
695
400 CV *cv; 696 CV *cv;
401 697
402 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
403 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
404 { 700 {
405 put_padlist (aTHX_ cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
406 CvDEPTH (cv) = PTR2IV (POPs); 702 CvDEPTH (cv) = PTR2IV (POPs);
407 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
408 } 704 }
409 705
410 PUTBACK; 706 PUTBACK;
411 } 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);
412} 729}
413 730
414static void 731static void
415save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
416{ 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
417 { 755 {
418 dSP; 756 dSP;
419 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
420 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
421 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
427 765
428 XPUSHs (Nullsv); 766 XPUSHs (Nullsv);
429 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
430 for (;;) 768 for (;;)
431 { 769 {
432 while (cxix >= 0) 770 while (expect_true (cxix >= 0))
433 { 771 {
434 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
435 773
436 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
437 { 775 {
438 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
439 777
440 if (CvDEPTH (cv)) 778 if (expect_true (CvDEPTH (cv)))
441 { 779 {
442 EXTEND (SP, 3); 780 EXTEND (SP, 3);
443 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
444 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
445 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
446 784
447 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
448 get_padlist (aTHX_ cv); 786 get_padlist (aTHX_ cv);
449 } 787 }
450 } 788 }
451 } 789 }
452 790
453 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
454 break; 792 break;
455 793
456 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
457 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
458 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
459 } 797 }
460 798
461 PUTBACK; 799 PUTBACK;
462 } 800 }
463 801
802 /* allocate some space on the context stack for our purposes */
803 /* we manually unroll here, as usually 2 slots is enough */
804 if (SLOT_COUNT >= 1) CXINC;
805 if (SLOT_COUNT >= 2) CXINC;
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 */
813
814 c->mainstack = PL_mainstack;
815
816 {
817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
818
464 c->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
465 c->defsv = DEFSV; 820 slot->defsv = DEFSV;
466 c->errsv = ERRSV; 821 slot->errsv = ERRSV;
467 c->irssv_sv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
468 824
469#define VAR(name,type)c->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
470# include "state.h" 826 # include "state.h"
471#undef VAR 827 #undef VAR
828 }
472} 829}
473 830
474/* 831/*
475 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
476 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
477 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
478 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
479 */ 836 */
480#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
481# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
482#else 839#else
483static void 840static void
484coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
485{ 842{
486 PL_curstackinfo = new_stackinfo(64, 6); 843 PL_curstackinfo = new_stackinfo(32, 8);
487 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
488 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
489 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490 847
491 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
492 PL_stack_sp = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
493 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494 851
495 New(50,PL_tmps_stack,64,SV*); 852 New(50,PL_tmps_stack,32,SV*);
496 PL_tmps_floor = -1; 853 PL_tmps_floor = -1;
497 PL_tmps_ix = -1; 854 PL_tmps_ix = -1;
498 PL_tmps_max = 64; 855 PL_tmps_max = 32;
499 856
500 New(54,PL_markstack,16,I32); 857 New(54,PL_markstack,16,I32);
501 PL_markstack_ptr = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
502 PL_markstack_max = PL_markstack + 16; 859 PL_markstack_max = PL_markstack + 16;
503 860
504#ifdef SET_MARK_OFFSET 861#ifdef SET_MARK_OFFSET
505 SET_MARK_OFFSET; 862 SET_MARK_OFFSET;
506#endif 863#endif
507 864
508 New(54,PL_scopestack,16,I32); 865 New(54,PL_scopestack,8,I32);
509 PL_scopestack_ix = 0; 866 PL_scopestack_ix = 0;
510 PL_scopestack_max = 16; 867 PL_scopestack_max = 8;
511 868
512 New(54,PL_savestack,64,ANY); 869 New(54,PL_savestack,24,ANY);
513 PL_savestack_ix = 0; 870 PL_savestack_ix = 0;
514 PL_savestack_max = 64; 871 PL_savestack_max = 24;
515 872
516#if !PERL_VERSION_ATLEAST (5,9,0) 873#if !PERL_VERSION_ATLEAST (5,10,0)
517 New(54,PL_retstack,4,OP*); 874 New(54,PL_retstack,4,OP*);
518 PL_retstack_ix = 0; 875 PL_retstack_ix = 0;
519 PL_retstack_max = 4; 876 PL_retstack_max = 4;
520#endif 877#endif
521} 878}
… …
523 880
524/* 881/*
525 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
526 */ 883 */
527static void 884static void
528coro_destroy_stacks (pTHX) 885coro_destruct_stacks (pTHX)
529{ 886{
530 while (PL_curstackinfo->si_next) 887 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
532 889
533 while (PL_curstackinfo) 890 while (PL_curstackinfo)
… …
544 901
545 Safefree (PL_tmps_stack); 902 Safefree (PL_tmps_stack);
546 Safefree (PL_markstack); 903 Safefree (PL_markstack);
547 Safefree (PL_scopestack); 904 Safefree (PL_scopestack);
548 Safefree (PL_savestack); 905 Safefree (PL_savestack);
549#if !PERL_VERSION_ATLEAST (5,9,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
550 Safefree (PL_retstack); 907 Safefree (PL_retstack);
551#endif 908#endif
552} 909}
553 910
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
554static size_t 920static size_t
555coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
556{ 922{
557 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
558 924
559 if (coro->mainstack) 925 if (coro->mainstack)
560 { 926 {
561 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
562 { 928 {
563 #define VAR(name,type)coro->name = PL_ ## name; 929 #define SYM(sym) PL_ ## sym
564 # include "state.h" 930 CORO_RSS;
565 #undef VAR 931 #undef SYM
566 } 932 }
933 else
934 {
935 #define SYM(sym) coro->slot->sym
936 CORO_RSS;
937 #undef SYM
938 }
939 }
567 940
568 rss += sizeof (coro->curstackinfo); 941 return rss;
569 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 942}
570 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
571 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
572 rss += coro->tmps_max * sizeof (SV *);
573 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
574 rss += coro->scopestack_max * sizeof (I32);
575 rss += coro->savestack_max * sizeof (ANY);
576 943
577#if !PERL_VERSION_ATLEAST (5,9,0) 944/** coroutine stack handling ************************************************/
578 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)
579#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 == '_')
580 } 969 {
970 SV **svp = 0;
581 971
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{
582 return rss; 1043 return 0;
583} 1044}
584 1045
585/** coroutine stack handling ************************************************/
586
587static 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 */
588coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
589{ 1056{
590 /* 1057 /*
591 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
592 */ 1059 */
593 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
594 1061
595 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
596 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
597 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
598 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
599 PL_curpm = 0; 1069 PL_curpm = 0;
1070 PL_curpad = 0;
600 PL_localizing = 0; 1071 PL_localizing = 0;
601 PL_dirty = 0;
602 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);
603 1081
604 GvSV (PL_defgv) = NEWSV (0, 0); 1082 GvSV (PL_defgv) = newSV (0);
605 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
606 GvSV (PL_errgv) = NEWSV (0, 0); 1084 GvSV (PL_errgv) = newSV (0);
607 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
608 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
609 PL_defoutgv = SvREFCNT_inc (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
610 1089
611 { 1090 {
612 dSP; 1091 dSP;
613 LOGOP myop; 1092 UNOP myop;
614 1093
615 Zero (&myop, 1, LOGOP); 1094 Zero (&myop, 1, UNOP);
616 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
617 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
618 1098
619 PUSHMARK (SP); 1099 PUSHMARK (SP);
620 XPUSHs (av_shift (GvAV (PL_defgv))); 1100 PUSHs ((SV *)coro->startcv);
621 PUTBACK; 1101 PUTBACK;
622 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
623 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
624 SPAGAIN;
625 } 1104 }
626 1105
627 ENTER; /* necessary e.g. for dounwind */ 1106 /* this newly created coroutine might be run on an existing cctx which most
628} 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 */
629 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
630static void 1132static void
631coro_destroy (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
632{ 1134{
633 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
634 { 1136 {
635 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
636 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
644 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
645 1147
646 /* unwind main stack */ 1148 /* unwind main stack */
647 dounwind (-1); 1149 dounwind (-1);
648 } 1150 }
1151}
649 1152
650 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
651 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
652 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
653 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
654 SvREFCNT_dec (PL_rs);
655 SvREFCNT_dec (GvSV (irsgv));
656 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 load_perl (aTHX_ coro);
1165
1166 coro_unwind_stacks (aTHX);
1167 coro_destruct_stacks (aTHX);
1168
1169 /* restore swapped sv's */
1170 SWAP_SVS (coro);
1171
1172 // now save some sv's to be free'd later
1173 svf [0] = GvSV (PL_defgv);
1174 svf [1] = (SV *)GvAV (PL_defgv);
1175 svf [2] = GvSV (PL_errgv);
1176 svf [3] = (SV *)PL_defoutgv;
1177 svf [4] = PL_rs;
1178 svf [5] = GvSV (irsgv);
1179 svf [6] = (SV *)GvHV (PL_hintgv);
1180 svf [7] = PL_diehook;
1181 svf [8] = PL_warnhook;
1182 assert (9 == sizeof (svf) / sizeof (*svf));
1183
1184 load_perl (aTHX_ current);
1185 }
1186
1187 {
1188 unsigned int i;
1189
1190 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1191 SvREFCNT_dec (svf [i]);
1192
657 SvREFCNT_dec (coro->saved_deffh); 1193 SvREFCNT_dec (coro->saved_deffh);
658 //SvREFCNT_dec (coro->throw); 1194 SvREFCNT_dec (coro->rouse_cb);
659 1195 SvREFCNT_dec (coro->invoke_cb);
660 coro_destroy_stacks (aTHX); 1196 SvREFCNT_dec (coro->invoke_av);
1197 }
661} 1198}
662 1199
663static void 1200INLINE void
664free_coro_mortal (pTHX) 1201free_coro_mortal (pTHX)
665{ 1202{
666 if (coro_mortal) 1203 if (expect_true (coro_mortal))
667 { 1204 {
668 SvREFCNT_dec (coro_mortal); 1205 SvREFCNT_dec (coro_mortal);
669 coro_mortal = 0; 1206 coro_mortal = 0;
670 } 1207 }
671} 1208}
… …
673static int 1210static int
674runops_trace (pTHX) 1211runops_trace (pTHX)
675{ 1212{
676 COP *oldcop = 0; 1213 COP *oldcop = 0;
677 int oldcxix = -2; 1214 int oldcxix = -2;
678 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
679 coro_cctx *cctx = coro->cctx;
680 1215
681 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
682 { 1217 {
683 PERL_ASYNC_CHECK (); 1218 PERL_ASYNC_CHECK ();
684 1219
685 if (cctx->flags & CC_TRACE_ALL) 1220 if (cctx_current->flags & CC_TRACE_ALL)
686 { 1221 {
687 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1222 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
688 { 1223 {
689 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
690 SV **bot, **top; 1225 SV **bot, **top;
691 AV *av = newAV (); /* return values */ 1226 AV *av = newAV (); /* return values */
692 SV **cb; 1227 SV **cb;
… …
700 bot = PL_stack_base + cx->blk_oldsp + 1; 1235 bot = PL_stack_base + cx->blk_oldsp + 1;
701 top = cx->blk_gimme == G_ARRAY ? SP + 1 1236 top = cx->blk_gimme == G_ARRAY ? SP + 1
702 : cx->blk_gimme == G_SCALAR ? bot + 1 1237 : cx->blk_gimme == G_SCALAR ? bot + 1
703 : bot; 1238 : bot;
704 1239
1240 av_extend (av, top - bot);
705 while (bot < top) 1241 while (bot < top)
706 av_push (av, SvREFCNT_inc (*bot++)); 1242 av_push (av, SvREFCNT_inc_NN (*bot++));
707 1243
708 PL_runops = RUNOPS_DEFAULT; 1244 PL_runops = RUNOPS_DEFAULT;
709 ENTER; 1245 ENTER;
710 SAVETMPS; 1246 SAVETMPS;
711 EXTEND (SP, 3); 1247 EXTEND (SP, 3);
… …
728 1264
729 if (PL_curcop != &PL_compiling) 1265 if (PL_curcop != &PL_compiling)
730 { 1266 {
731 SV **cb; 1267 SV **cb;
732 1268
733 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
734 { 1270 {
735 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
736 1272
737 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
738 { 1274 {
739 runops_proc_t old_runops = PL_runops;
740 dSP; 1275 dSP;
741 GV *gv = CvGV (cx->blk_sub.cv); 1276 GV *gv = CvGV (cx->blk_sub.cv);
742 SV *fullname = sv_2mortal (newSV (0)); 1277 SV *fullname = sv_2mortal (newSV (0));
743 1278
744 if (isGV (gv)) 1279 if (isGV (gv))
… …
749 SAVETMPS; 1284 SAVETMPS;
750 EXTEND (SP, 3); 1285 EXTEND (SP, 3);
751 PUSHMARK (SP); 1286 PUSHMARK (SP);
752 PUSHs (&PL_sv_yes); 1287 PUSHs (&PL_sv_yes);
753 PUSHs (fullname); 1288 PUSHs (fullname);
754 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1289 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
755 PUTBACK; 1290 PUTBACK;
756 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1291 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
757 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1292 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
758 SPAGAIN; 1293 SPAGAIN;
759 FREETMPS; 1294 FREETMPS;
… …
762 } 1297 }
763 1298
764 oldcxix = cxstack_ix; 1299 oldcxix = cxstack_ix;
765 } 1300 }
766 1301
767 if (cctx->flags & CC_TRACE_LINE) 1302 if (cctx_current->flags & CC_TRACE_LINE)
768 { 1303 {
769 dSP; 1304 dSP;
770 1305
771 PL_runops = RUNOPS_DEFAULT; 1306 PL_runops = RUNOPS_DEFAULT;
772 ENTER; 1307 ENTER;
… …
791 1326
792 TAINT_NOT; 1327 TAINT_NOT;
793 return 0; 1328 return 0;
794} 1329}
795 1330
796/* inject a fake call to Coro::State::_cctx_init into the execution */ 1331static struct CoroSLF cctx_ssl_frame;
797/* _cctx_init should be careful, as it could be called at almost any time */ 1332
798/* during execution of a perl program */ 1333static void
1334slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1335{
1336 ta->prev = 0;
1337}
1338
1339static int
1340slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1341{
1342 *frame = cctx_ssl_frame;
1343
1344 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1345}
1346
1347/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
799static void NOINLINE 1348static void NOINLINE
800prepare_cctx (pTHX_ coro_cctx *cctx) 1349cctx_prepare (pTHX)
801{ 1350{
802 dSP;
803 LOGOP myop;
804
805 PL_top_env = &PL_start_env; 1351 PL_top_env = &PL_start_env;
806 1352
807 if (cctx->flags & CC_TRACE) 1353 if (cctx_current->flags & CC_TRACE)
808 PL_runops = runops_trace; 1354 PL_runops = runops_trace;
809 1355
810 Zero (&myop, 1, LOGOP); 1356 /* we already must be executing an SLF op, there is no other valid way
811 myop.op_next = PL_op; 1357 * that can lead to creation of a new cctx */
812 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1358 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1359 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
813 1360
814 PUSHMARK (SP); 1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
815 EXTEND (SP, 2); 1362 cctx_ssl_frame = slf_frame;
816 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1363
817 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1364 slf_frame.prepare = slf_prepare_set_stacklevel;
818 PUTBACK; 1365 slf_frame.check = slf_check_set_stacklevel;
819 PL_op = (OP *)&myop; 1366}
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1367
821 SPAGAIN; 1368/* the tail of transfer: execute stuff we can only do after a transfer */
1369INLINE void
1370transfer_tail (pTHX)
1371{
1372 free_coro_mortal (aTHX);
822} 1373}
823 1374
824/* 1375/*
825 * this is a _very_ stripped down perl interpreter ;) 1376 * this is a _very_ stripped down perl interpreter ;)
826 */ 1377 */
827static void 1378static void
828coro_run (void *arg) 1379cctx_run (void *arg)
829{ 1380{
1381#ifdef USE_ITHREADS
1382# if CORO_PTHREAD
1383 PERL_SET_CONTEXT (coro_thx);
1384# endif
1385#endif
1386 {
830 dTHX; 1387 dTHX;
831 1388
832 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1389 /* normally we would need to skip the entersub here */
833 UNLOCK; 1390 /* not doing so will re-execute it, which is exactly what we want */
834
835 /* we now skip the entersub that lead to transfer() */
836 PL_op = PL_op->op_next; 1391 /* PL_nop = PL_nop->op_next */
837 1392
838 /* inject a fake subroutine call to cctx_init */ 1393 /* inject a fake subroutine call to cctx_init */
839 prepare_cctx (aTHX_ (coro_cctx *)arg); 1394 cctx_prepare (aTHX);
840 1395
1396 /* cctx_run is the alternative tail of transfer() */
1397 transfer_tail (aTHX);
1398
841 /* somebody or something will hit me for both perl_run and PL_restartop */ 1399 /* somebody or something will hit me for both perl_run and PL_restartop */
842 PL_restartop = PL_op; 1400 PL_restartop = PL_op;
843 perl_run (PL_curinterp); 1401 perl_run (PL_curinterp);
844
845 /* 1402 /*
1403 * Unfortunately, there is no way to get at the return values of the
1404 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1405 * runtime errors here, as this is just a random interpreter, not a thread.
1406 */
1407
1408 /*
846 * If perl-run returns we assume exit() was being called or the coro 1409 * If perl-run returns we assume exit() was being called or the coro
847 * fell off the end, which seems to be the only valid (non-bug) 1410 * fell off the end, which seems to be the only valid (non-bug)
848 * reason for perl_run to return. We try to exit by jumping to the 1411 * reason for perl_run to return. We try to exit by jumping to the
849 * bootstrap-time "top" top_env, as we cannot restore the "main" 1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
850 * coroutine as Coro has no such concept 1413 * coroutine as Coro has no such concept.
1414 * This actually isn't valid with the pthread backend, but OSes requiring
1415 * that backend are too broken to do it in a standards-compliant way.
851 */ 1416 */
852 PL_top_env = main_top_env; 1417 PL_top_env = main_top_env;
853 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1418 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1419 }
854} 1420}
855 1421
856static coro_cctx * 1422static coro_cctx *
857cctx_new () 1423cctx_new ()
858{ 1424{
859 coro_cctx *cctx; 1425 coro_cctx *cctx;
1426
1427 ++cctx_count;
1428 New (0, cctx, 1, coro_cctx);
1429
1430 cctx->gen = cctx_gen;
1431 cctx->flags = 0;
1432 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1433
1434 return cctx;
1435}
1436
1437/* create a new cctx only suitable as source */
1438static coro_cctx *
1439cctx_new_empty ()
1440{
1441 coro_cctx *cctx = cctx_new ();
1442
1443 cctx->sptr = 0;
1444 coro_create (&cctx->cctx, 0, 0, 0, 0);
1445
1446 return cctx;
1447}
1448
1449/* create a new cctx suitable as destination/running a perl interpreter */
1450static coro_cctx *
1451cctx_new_run ()
1452{
1453 coro_cctx *cctx = cctx_new ();
860 void *stack_start; 1454 void *stack_start;
861 size_t stack_size; 1455 size_t stack_size;
862 1456
863 ++cctx_count;
864
865 Newz (0, cctx, 1, coro_cctx);
866
867#if HAVE_MMAP 1457#if HAVE_MMAP
868
869 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1458 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
870 /* mmap supposedly does allocate-on-write for us */ 1459 /* mmap supposedly does allocate-on-write for us */
871 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1460 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
872 1461
873 if (cctx->sptr != (void *)-1) 1462 if (cctx->sptr != (void *)-1)
874 { 1463 {
875# if CORO_STACKGUARD 1464 #if CORO_STACKGUARD
876 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1465 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
877# endif 1466 #endif
878 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1467 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
879 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1468 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
880 cctx->flags |= CC_MAPPED; 1469 cctx->flags |= CC_MAPPED;
881 } 1470 }
882 else 1471 else
883#endif 1472#endif
884 { 1473 {
885 cctx->ssize = coro_stacksize * (long)sizeof (long); 1474 cctx->ssize = cctx_stacksize * (long)sizeof (long);
886 New (0, cctx->sptr, coro_stacksize, long); 1475 New (0, cctx->sptr, cctx_stacksize, long);
887 1476
888 if (!cctx->sptr) 1477 if (!cctx->sptr)
889 { 1478 {
890 perror ("FATAL: unable to allocate stack for coroutine"); 1479 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
891 _exit (EXIT_FAILURE); 1480 _exit (EXIT_FAILURE);
892 } 1481 }
893 1482
894 stack_start = cctx->sptr; 1483 stack_start = cctx->sptr;
895 stack_size = cctx->ssize; 1484 stack_size = cctx->ssize;
896 } 1485 }
897 1486
898 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1487 #if CORO_USE_VALGRIND
1488 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1489 #endif
1490
899 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1491 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
900 1492
901 return cctx; 1493 return cctx;
902} 1494}
903 1495
904static void 1496static void
905cctx_destroy (coro_cctx *cctx) 1497cctx_destroy (coro_cctx *cctx)
906{ 1498{
907 if (!cctx) 1499 if (!cctx)
908 return; 1500 return;
909 1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
910 --cctx_count; 1504 --cctx_count;
1505 coro_destroy (&cctx->cctx);
911 1506
1507 /* coro_transfer creates new, empty cctx's */
1508 if (cctx->sptr)
1509 {
912#if CORO_USE_VALGRIND 1510 #if CORO_USE_VALGRIND
913 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1511 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1512 #endif
1513
1514#if HAVE_MMAP
1515 if (cctx->flags & CC_MAPPED)
1516 munmap (cctx->sptr, cctx->ssize);
1517 else
914#endif 1518#endif
915
916#if HAVE_MMAP
917 if (cctx->flags & CC_MAPPED)
918 munmap (cctx->sptr, cctx->ssize);
919 else
920#endif
921 Safefree (cctx->sptr); 1519 Safefree (cctx->sptr);
1520 }
922 1521
923 Safefree (cctx); 1522 Safefree (cctx);
924} 1523}
1524
1525/* wether this cctx should be destructed */
1526#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
925 1527
926static coro_cctx * 1528static coro_cctx *
927cctx_get (pTHX) 1529cctx_get (pTHX)
928{ 1530{
929 while (cctx_first) 1531 while (expect_true (cctx_first))
930 { 1532 {
931 coro_cctx *cctx = cctx_first; 1533 coro_cctx *cctx = cctx_first;
932 cctx_first = cctx->next; 1534 cctx_first = cctx->next;
933 --cctx_idle; 1535 --cctx_idle;
934 1536
935 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1537 if (expect_true (!CCTX_EXPIRED (cctx)))
936 return cctx; 1538 return cctx;
937 1539
938 cctx_destroy (cctx); 1540 cctx_destroy (cctx);
939 } 1541 }
940 1542
941 return cctx_new (); 1543 return cctx_new_run ();
942} 1544}
943 1545
944static void 1546static void
945cctx_put (coro_cctx *cctx) 1547cctx_put (coro_cctx *cctx)
946{ 1548{
1549 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1550
947 /* free another cctx if overlimit */ 1551 /* free another cctx if overlimit */
948 if (cctx_idle >= MAX_IDLE_CCTX) 1552 if (expect_false (cctx_idle >= cctx_max_idle))
949 { 1553 {
950 coro_cctx *first = cctx_first; 1554 coro_cctx *first = cctx_first;
951 cctx_first = first->next; 1555 cctx_first = first->next;
952 --cctx_idle; 1556 --cctx_idle;
953 1557
… …
959 cctx_first = cctx; 1563 cctx_first = cctx;
960} 1564}
961 1565
962/** coroutine switching *****************************************************/ 1566/** coroutine switching *****************************************************/
963 1567
964static void NOINLINE 1568static void
965transfer_check (pTHX_ struct coro *prev, struct coro *next) 1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
966{ 1570{
967 if (prev != next) 1571 /* TODO: throwing up here is considered harmful */
1572
1573 if (expect_true (prev != next))
968 { 1574 {
969 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
970 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1576 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
971 1577
972 if (next->flags & CF_RUNNING) 1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
973 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
974
975 if (next->flags & CF_DESTROYED)
976 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1579 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
977 1580
1581#if !PERL_VERSION_ATLEAST (5,10,0)
978 if (PL_lex_state != LEX_NOTPARSING) 1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
979 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1583 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1584#endif
980 } 1585 }
981} 1586}
982 1587
983/* always use the TRANSFER macro */ 1588/* always use the TRANSFER macro */
984static void NOINLINE 1589static void NOINLINE /* noinline so we have a fixed stackframe */
985transfer (pTHX_ struct coro *prev, struct coro *next) 1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
986{ 1591{
987 dSTACKLEVEL; 1592 dSTACKLEVEL;
988 1593
989 /* sometimes transfer is only called to set idle_sp */ 1594 /* sometimes transfer is only called to set idle_sp */
990 if (!next) 1595 if (expect_false (!prev))
991 { 1596 {
992 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1597 cctx_current->idle_sp = STACKLEVEL;
993 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1598 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
994 }
995 else if (prev != next)
996 { 1599 }
1600 else if (expect_true (prev != next))
1601 {
997 coro_cctx *prev__cctx; 1602 coro_cctx *cctx_prev;
998 1603
999 if (prev->flags & CF_NEW) 1604 if (expect_false (prev->flags & CF_NEW))
1000 { 1605 {
1001 /* create a new empty context */ 1606 /* create a new empty/source context */
1002 Newz (0, prev->cctx, 1, coro_cctx);
1003 prev->flags &= ~CF_NEW; 1607 prev->flags &= ~CF_NEW;
1004 prev->flags |= CF_RUNNING; 1608 prev->flags |= CF_RUNNING;
1005 } 1609 }
1006 1610
1007 prev->flags &= ~CF_RUNNING; 1611 prev->flags &= ~CF_RUNNING;
1008 next->flags |= CF_RUNNING; 1612 next->flags |= CF_RUNNING;
1009 1613
1010 LOCK; 1614 /* first get rid of the old state */
1615 save_perl (aTHX_ prev);
1011 1616
1012 if (next->flags & CF_NEW) 1617 if (expect_false (next->flags & CF_NEW))
1013 { 1618 {
1014 /* need to start coroutine */ 1619 /* need to start coroutine */
1015 next->flags &= ~CF_NEW; 1620 next->flags &= ~CF_NEW;
1016 /* first get rid of the old state */
1017 save_perl (aTHX_ prev);
1018 /* setup coroutine call */ 1621 /* setup coroutine call */
1019 coro_setup (aTHX_ next); 1622 init_perl (aTHX_ next);
1020 } 1623 }
1021 else 1624 else
1625 load_perl (aTHX_ next);
1626
1627 /* possibly untie and reuse the cctx */
1628 if (expect_true (
1629 cctx_current->idle_sp == STACKLEVEL
1630 && !(cctx_current->flags & CC_TRACE)
1631 && !force_cctx
1632 ))
1022 { 1633 {
1023 /* coroutine already started */ 1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1024 save_perl (aTHX_ prev); 1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1025 load_perl (aTHX_ next); 1636
1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1640 if (expect_true (!next->cctx))
1641 next->cctx = cctx_get (aTHX);
1642
1643 cctx_put (cctx_current);
1026 } 1644 }
1645 else
1646 prev->cctx = cctx_current;
1027 1647
1028 prev__cctx = prev->cctx; 1648 ++next->usecount;
1029 1649
1030 /* possibly "free" the cctx */ 1650 cctx_prev = cctx_current;
1031 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1652
1653 next->cctx = 0;
1654
1655 if (expect_false (cctx_prev != cctx_current))
1032 { 1656 {
1033 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1657 cctx_prev->top_env = PL_top_env;
1034 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1658 PL_top_env = cctx_current->top_env;
1035 1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1036 prev->cctx = 0;
1037
1038 cctx_put (prev__cctx);
1039 } 1660 }
1040 1661
1041 ++next->usecount; 1662 transfer_tail (aTHX);
1042
1043 if (!next->cctx)
1044 next->cctx = cctx_get (aTHX);
1045
1046 if (prev__cctx != next->cctx)
1047 {
1048 prev__cctx->top_env = PL_top_env;
1049 PL_top_env = next->cctx->top_env;
1050 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1051 }
1052
1053 free_coro_mortal (aTHX);
1054 UNLOCK;
1055 } 1663 }
1056} 1664}
1057 1665
1058struct transfer_args
1059{
1060 struct coro *prev, *next;
1061};
1062
1063#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1666#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1064#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1667#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1065 1668
1066/** high level stuff ********************************************************/ 1669/** high level stuff ********************************************************/
1067 1670
1068static int 1671static int
1069coro_state_destroy (pTHX_ struct coro *coro) 1672coro_state_destroy (pTHX_ struct coro *coro)
1070{ 1673{
1071 if (coro->flags & CF_DESTROYED) 1674 if (coro->flags & CF_DESTROYED)
1072 return 0; 1675 return 0;
1676
1677 if (coro->on_destroy && !PL_dirty)
1678 coro->on_destroy (aTHX_ coro);
1679
1680 /*
1681 * The on_destroy above most likely is from an SLF call.
1682 * Since by definition the SLF call will not finish when we destroy
1683 * the coro, we will have to force-finish it here, otherwise
1684 * cleanup functions cannot call SLF functions.
1685 */
1686 coro->slf_frame.prepare = 0;
1073 1687
1074 coro->flags |= CF_DESTROYED; 1688 coro->flags |= CF_DESTROYED;
1075 1689
1076 if (coro->flags & CF_READY) 1690 if (coro->flags & CF_READY)
1077 { 1691 {
1078 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1692 /* reduce nready, as destroying a ready coro effectively unreadies it */
1079 /* alternative: look through all ready queues and remove the coro */ 1693 /* alternative: look through all ready queues and remove the coro */
1080 LOCK;
1081 --coro_nready; 1694 --coro_nready;
1082 UNLOCK;
1083 } 1695 }
1084 else 1696 else
1085 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1697 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1086 1698
1087 if (coro->mainstack && coro->mainstack != main_mainstack) 1699 if (coro->mainstack
1088 { 1700 && coro->mainstack != main_mainstack
1089 struct coro temp; 1701 && coro->slot
1090 1702 && !PL_dirty)
1091 if (coro->flags & CF_RUNNING)
1092 croak ("FATAL: tried to destroy currently running coroutine");
1093
1094 save_perl (aTHX_ &temp);
1095 load_perl (aTHX_ coro); 1703 destroy_perl (aTHX_ coro);
1096
1097 coro_destroy (aTHX_ coro);
1098
1099 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1100
1101 coro->mainstack = 0;
1102 }
1103
1104 cctx_destroy (coro->cctx);
1105 SvREFCNT_dec (coro->args);
1106 1704
1107 if (coro->next) coro->next->prev = coro->prev; 1705 if (coro->next) coro->next->prev = coro->prev;
1108 if (coro->prev) coro->prev->next = coro->next; 1706 if (coro->prev) coro->prev->next = coro->next;
1109 if (coro == coro_first) coro_first = coro->next; 1707 if (coro == coro_first) coro_first = coro->next;
1708
1709 cctx_destroy (coro->cctx);
1710 SvREFCNT_dec (coro->startcv);
1711 SvREFCNT_dec (coro->args);
1712 SvREFCNT_dec (coro->swap_sv);
1713 SvREFCNT_dec (CORO_THROW);
1110 1714
1111 return 1; 1715 return 1;
1112} 1716}
1113 1717
1114static int 1718static int
… …
1148# define MGf_DUP 0 1752# define MGf_DUP 0
1149#endif 1753#endif
1150}; 1754};
1151 1755
1152static void 1756static void
1153prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1757prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1154{ 1758{
1155 ta->prev = SvSTATE (prev_sv); 1759 ta->prev = SvSTATE (prev_sv);
1156 ta->next = SvSTATE (next_sv); 1760 ta->next = SvSTATE (next_sv);
1157 TRANSFER_CHECK (*ta); 1761 TRANSFER_CHECK (*ta);
1158} 1762}
1159 1763
1160static void 1764static void
1161api_transfer (SV *prev_sv, SV *next_sv) 1765api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1766{
1767 struct coro_transfer_args ta;
1768
1769 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1770 TRANSFER (ta, 1);
1771}
1772
1773/** Coro ********************************************************************/
1774
1775INLINE void
1776coro_enq (pTHX_ struct coro *coro)
1777{
1778 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1779
1780 SvREFCNT_inc_NN (coro->hv);
1781
1782 coro->next_ready = 0;
1783 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1784 ready [1] = coro;
1785}
1786
1787INLINE struct coro *
1788coro_deq (pTHX)
1789{
1790 int prio;
1791
1792 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1793 {
1794 struct coro **ready = coro_ready [prio];
1795
1796 if (ready [0])
1797 {
1798 struct coro *coro = ready [0];
1799 ready [0] = coro->next_ready;
1800 return coro;
1801 }
1802 }
1803
1804 return 0;
1805}
1806
1807static void
1808invoke_sv_ready_hook_helper (void)
1162{ 1809{
1163 dTHX; 1810 dTHX;
1164 struct transfer_args ta; 1811 dSP;
1165 1812
1166 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1813 ENTER;
1167 TRANSFER (ta); 1814 SAVETMPS;
1168}
1169 1815
1170/** Coro ********************************************************************/ 1816 PUSHMARK (SP);
1817 PUTBACK;
1818 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1171 1819
1172static void 1820 FREETMPS;
1173coro_enq (pTHX_ SV *coro_sv) 1821 LEAVE;
1174{
1175 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1176}
1177
1178static SV *
1179coro_deq (pTHX_ int min_prio)
1180{
1181 int prio = PRIO_MAX - PRIO_MIN;
1182
1183 min_prio -= PRIO_MIN;
1184 if (min_prio < 0)
1185 min_prio = 0;
1186
1187 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1188 if (AvFILLp (coro_ready [prio]) >= 0)
1189 return av_shift (coro_ready [prio]);
1190
1191 return 0;
1192} 1822}
1193 1823
1194static int 1824static int
1195api_ready (SV *coro_sv) 1825api_ready (pTHX_ SV *coro_sv)
1196{ 1826{
1197 dTHX;
1198 struct coro *coro;
1199
1200 if (SvROK (coro_sv))
1201 coro_sv = SvRV (coro_sv);
1202
1203 coro = SvSTATE (coro_sv); 1827 struct coro *coro = SvSTATE (coro_sv);
1204 1828
1205 if (coro->flags & CF_READY) 1829 if (coro->flags & CF_READY)
1206 return 0; 1830 return 0;
1207 1831
1208 coro->flags |= CF_READY; 1832 coro->flags |= CF_READY;
1209 1833
1210 LOCK; 1834 coro_enq (aTHX_ coro);
1211 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1835
1212 ++coro_nready; 1836 if (!coro_nready++)
1213 UNLOCK; 1837 if (coroapi.readyhook)
1838 coroapi.readyhook ();
1214 1839
1215 return 1; 1840 return 1;
1216} 1841}
1217 1842
1218static int 1843static int
1219api_is_ready (SV *coro_sv) 1844api_is_ready (pTHX_ SV *coro_sv)
1220{ 1845{
1221 dTHX;
1222 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1846 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1223} 1847}
1224 1848
1225static void 1849/* expects to own a reference to next->hv */
1850INLINE void
1226prepare_schedule (pTHX_ struct transfer_args *ta) 1851prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1227{ 1852{
1228 SV *prev_sv, *next_sv;
1229
1230 for (;;)
1231 {
1232 LOCK;
1233 next_sv = coro_deq (aTHX_ PRIO_MIN);
1234
1235 /* nothing to schedule: call the idle handler */
1236 if (!next_sv)
1237 {
1238 dSP;
1239 UNLOCK;
1240
1241 ENTER;
1242 SAVETMPS;
1243
1244 PUSHMARK (SP);
1245 PUTBACK;
1246 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1247
1248 FREETMPS;
1249 LEAVE;
1250 continue;
1251 }
1252
1253 ta->next = SvSTATE (next_sv);
1254
1255 /* cannot transfer to destroyed coros, skip and look for next */
1256 if (ta->next->flags & CF_DESTROYED)
1257 {
1258 UNLOCK;
1259 SvREFCNT_dec (next_sv);
1260 /* coro_nready is already taken care of by destroy */
1261 continue;
1262 }
1263
1264 --coro_nready;
1265 UNLOCK;
1266 break;
1267 }
1268
1269 /* free this only after the transfer */
1270 prev_sv = SvRV (coro_current); 1853 SV *prev_sv = SvRV (coro_current);
1854
1271 ta->prev = SvSTATE (prev_sv); 1855 ta->prev = SvSTATE_hv (prev_sv);
1856 ta->next = next;
1857
1272 TRANSFER_CHECK (*ta); 1858 TRANSFER_CHECK (*ta);
1273 assert (ta->next->flags & CF_READY); 1859
1274 ta->next->flags &= ~CF_READY;
1275 SvRV_set (coro_current, next_sv); 1860 SvRV_set (coro_current, (SV *)next->hv);
1276 1861
1277 LOCK;
1278 free_coro_mortal (aTHX); 1862 free_coro_mortal (aTHX);
1279 coro_mortal = prev_sv; 1863 coro_mortal = prev_sv;
1280 UNLOCK;
1281} 1864}
1282 1865
1283static void 1866static void
1867prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1868{
1869 for (;;)
1870 {
1871 struct coro *next = coro_deq (aTHX);
1872
1873 if (expect_true (next))
1874 {
1875 /* cannot transfer to destroyed coros, skip and look for next */
1876 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1877 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1878 else
1879 {
1880 next->flags &= ~CF_READY;
1881 --coro_nready;
1882
1883 prepare_schedule_to (aTHX_ ta, next);
1884 break;
1885 }
1886 }
1887 else
1888 {
1889 /* nothing to schedule: call the idle handler */
1890 if (SvROK (sv_idle)
1891 && SvOBJECT (SvRV (sv_idle)))
1892 {
1893 if (SvRV (sv_idle) == SvRV (coro_current))
1894 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1895
1896 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1897 api_ready (aTHX_ SvRV (sv_idle));
1898 --coro_nready;
1899 }
1900 else
1901 {
1902 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1903 dSP;
1904
1905 ENTER;
1906 SAVETMPS;
1907
1908 PUSHMARK (SP);
1909 PUTBACK;
1910 call_sv (sv_idle, G_VOID | G_DISCARD);
1911
1912 FREETMPS;
1913 LEAVE;
1914 }
1915 }
1916 }
1917}
1918
1919INLINE void
1284prepare_cede (pTHX_ struct transfer_args *ta) 1920prepare_cede (pTHX_ struct coro_transfer_args *ta)
1285{ 1921{
1286 api_ready (coro_current); 1922 api_ready (aTHX_ coro_current);
1287 prepare_schedule (aTHX_ ta); 1923 prepare_schedule (aTHX_ ta);
1288} 1924}
1289 1925
1926INLINE void
1927prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1928{
1929 SV *prev = SvRV (coro_current);
1930
1931 if (coro_nready)
1932 {
1933 prepare_schedule (aTHX_ ta);
1934 api_ready (aTHX_ prev);
1935 }
1936 else
1937 prepare_nop (aTHX_ ta);
1938}
1939
1940static void
1941api_schedule (pTHX)
1942{
1943 struct coro_transfer_args ta;
1944
1945 prepare_schedule (aTHX_ &ta);
1946 TRANSFER (ta, 1);
1947}
1948
1949static void
1950api_schedule_to (pTHX_ SV *coro_sv)
1951{
1952 struct coro_transfer_args ta;
1953 struct coro *next = SvSTATE (coro_sv);
1954
1955 SvREFCNT_inc_NN (coro_sv);
1956 prepare_schedule_to (aTHX_ &ta, next);
1957}
1958
1290static int 1959static int
1291prepare_cede_notself (pTHX_ struct transfer_args *ta) 1960api_cede (pTHX)
1292{ 1961{
1293 if (coro_nready) 1962 struct coro_transfer_args ta;
1294 { 1963
1295 SV *prev = SvRV (coro_current);
1296 prepare_schedule (aTHX_ ta); 1964 prepare_cede (aTHX_ &ta);
1297 api_ready (prev); 1965
1966 if (expect_true (ta.prev != ta.next))
1967 {
1968 TRANSFER (ta, 1);
1298 return 1; 1969 return 1;
1299 } 1970 }
1300 else 1971 else
1301 return 0; 1972 return 0;
1302} 1973}
1303 1974
1304static void
1305api_schedule (void)
1306{
1307 dTHX;
1308 struct transfer_args ta;
1309
1310 prepare_schedule (aTHX_ &ta);
1311 TRANSFER (ta);
1312}
1313
1314static int 1975static int
1315api_cede (void) 1976api_cede_notself (pTHX)
1316{ 1977{
1317 dTHX; 1978 if (coro_nready)
1979 {
1318 struct transfer_args ta; 1980 struct coro_transfer_args ta;
1319 1981
1320 prepare_cede (aTHX_ &ta); 1982 prepare_cede_notself (aTHX_ &ta);
1321
1322 if (ta.prev != ta.next)
1323 {
1324 TRANSFER (ta); 1983 TRANSFER (ta, 1);
1325 return 1; 1984 return 1;
1326 } 1985 }
1327 else 1986 else
1328 return 0; 1987 return 0;
1329} 1988}
1330 1989
1331static int 1990static void
1332api_cede_notself (void)
1333{
1334 dTHX;
1335 struct transfer_args ta;
1336
1337 if (prepare_cede_notself (aTHX_ &ta))
1338 {
1339 TRANSFER (ta);
1340 return 1;
1341 }
1342 else
1343 return 0;
1344}
1345
1346static void
1347api_trace (SV *coro_sv, int flags) 1991api_trace (pTHX_ SV *coro_sv, int flags)
1348{ 1992{
1349 dTHX;
1350 struct coro *coro = SvSTATE (coro_sv); 1993 struct coro *coro = SvSTATE (coro_sv);
1351 1994
1995 if (coro->flags & CF_RUNNING)
1996 croak ("cannot enable tracing on a running coroutine, caught");
1997
1352 if (flags & CC_TRACE) 1998 if (flags & CC_TRACE)
1353 { 1999 {
1354 if (!coro->cctx) 2000 if (!coro->cctx)
1355 coro->cctx = cctx_new (); 2001 coro->cctx = cctx_new_run ();
1356 else if (!(coro->cctx->flags & CC_TRACE)) 2002 else if (!(coro->cctx->flags & CC_TRACE))
1357 croak ("cannot enable tracing on coroutine with custom stack"); 2003 croak ("cannot enable tracing on coroutine with custom stack, caught");
1358 2004
1359 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2005 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1360 } 2006 }
1361 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2007 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1362 { 2008 {
1363 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2009 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1364 2010
1365 if (coro->flags & CF_RUNNING) 2011 if (coro->flags & CF_RUNNING)
1366 PL_runops = RUNOPS_DEFAULT; 2012 PL_runops = RUNOPS_DEFAULT;
1367 else 2013 else
1368 coro->runops = RUNOPS_DEFAULT; 2014 coro->slot->runops = RUNOPS_DEFAULT;
2015 }
2016}
2017
2018static void
2019coro_call_on_destroy (pTHX_ struct coro *coro)
2020{
2021 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2022
2023 if (on_destroyp)
2024 {
2025 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2026 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2027 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2028
2029 while (AvFILLp (on_destroy) >= 0)
2030 {
2031 dSP; /* don't disturb outer sp */
2032 SV *cb = av_pop (on_destroy);
2033
2034 PUSHMARK (SP);
2035
2036 if (statusp)
2037 {
2038 int i;
2039 EXTEND (SP, AvFILLp (status) + 1);
2040
2041 for (i = 0; i <= AvFILLp (status); ++i)
2042 PUSHs (AvARRAY (status)[i]);
2043 }
2044
2045 PUTBACK;
2046 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2047 }
2048 }
2049}
2050
2051static void
2052coro_set_status (HV *coro_hv, SV **arg, int items)
2053{
2054 AV *av = newAV ();
2055
2056 /* items are actually not so common, so optimise for this case */
2057 if (items)
2058 {
2059 int i;
2060
2061 av_extend (av, items - 1);
2062
2063 for (i = 0; i < items; ++i)
2064 av_push (av, SvREFCNT_inc_NN (arg [i]));
2065 }
2066
2067 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2068}
2069
2070static void
2071slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2072{
2073 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2074 api_ready (aTHX_ sv_manager);
2075
2076 frame->prepare = prepare_schedule;
2077 frame->check = slf_check_repeat;
2078
2079 /* as a minor optimisation, we could unwind all stacks here */
2080 /* but that puts extra pressure on pp_slf, and is not worth much */
2081 /*coro_unwind_stacks (aTHX);*/
2082}
2083
2084static void
2085slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2086{
2087 HV *coro_hv = (HV *)SvRV (coro_current);
2088
2089 coro_set_status (coro_hv, arg, items);
2090 slf_init_terminate_cancel_common (frame, coro_hv);
2091}
2092
2093static void
2094slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2095{
2096 HV *coro_hv;
2097 struct coro *coro;
2098
2099 if (items <= 0)
2100 croak ("Coro::cancel called without coro object,");
2101
2102 coro = SvSTATE (arg [0]);
2103 coro_hv = coro->hv;
2104
2105 coro_set_status (coro_hv, arg + 1, items - 1);
2106
2107 if (expect_false (coro->flags & CF_NOCANCEL))
2108 {
2109 /* coro currently busy cancelling something, so just notify it */
2110 coro->slf_frame.data = (void *)coro;
2111
2112 frame->prepare = prepare_nop;
2113 frame->check = slf_check_nop;
2114 }
2115 else if (coro_hv == (HV *)SvRV (coro_current))
2116 {
2117 /* cancelling the current coro is allowed, and equals terminate */
2118 slf_init_terminate_cancel_common (frame, coro_hv);
2119 }
2120 else
2121 {
2122 struct coro *self = SvSTATE_current;
2123
2124 /* otherwise we cancel directly, purely for speed reasons
2125 * unfortunately, this requires some magic trickery, as
2126 * somebody else could cancel us, so we have to fight the cancellation.
2127 * this is ugly, and hopefully fully worth the extra speed.
2128 * besides, I can't get the slow-but-safe version working...
2129 */
2130 slf_frame.data = 0;
2131 self->flags |= CF_NOCANCEL;
2132
2133 coro_state_destroy (aTHX_ coro);
2134 coro_call_on_destroy (aTHX_ coro);
2135
2136 self->flags &= ~CF_NOCANCEL;
2137
2138 if (slf_frame.data)
2139 {
2140 /* while we were busy we have been cancelled, so terminate */
2141 slf_init_terminate_cancel_common (frame, self->hv);
2142 }
2143 else
2144 {
2145 frame->prepare = prepare_nop;
2146 frame->check = slf_check_nop;
2147 }
2148 }
2149}
2150
2151/*****************************************************************************/
2152/* async pool handler */
2153
2154static int
2155slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2156{
2157 HV *hv = (HV *)SvRV (coro_current);
2158 struct coro *coro = (struct coro *)frame->data;
2159
2160 if (!coro->invoke_cb)
2161 return 1; /* loop till we have invoke */
2162 else
2163 {
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2168
2169 {
2170 dSP;
2171 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2172 PUTBACK;
1369 } 2173 }
2174
2175 SvREFCNT_dec (GvAV (PL_defgv));
2176 GvAV (PL_defgv) = coro->invoke_av;
2177 coro->invoke_av = 0;
2178
2179 return 0;
2180 }
2181}
2182
2183static void
2184slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *hv = (HV *)SvRV (coro_current);
2187 struct coro *coro = SvSTATE_hv ((SV *)hv);
2188
2189 if (expect_true (coro->saved_deffh))
2190 {
2191 /* subsequent iteration */
2192 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2193 coro->saved_deffh = 0;
2194
2195 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2196 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2197 {
2198 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2199 coro->invoke_av = newAV ();
2200
2201 frame->prepare = prepare_nop;
2202 }
2203 else
2204 {
2205 av_clear (GvAV (PL_defgv));
2206 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2207
2208 coro->prio = 0;
2209
2210 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2211 api_trace (aTHX_ coro_current, 0);
2212
2213 frame->prepare = prepare_schedule;
2214 av_push (av_async_pool, SvREFCNT_inc (hv));
2215 }
2216 }
2217 else
2218 {
2219 /* first iteration, simply fall through */
2220 frame->prepare = prepare_nop;
2221 }
2222
2223 frame->check = slf_check_pool_handler;
2224 frame->data = (void *)coro;
2225}
2226
2227/*****************************************************************************/
2228/* rouse callback */
2229
2230#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2231
2232static void
2233coro_rouse_callback (pTHX_ CV *cv)
2234{
2235 dXSARGS;
2236 SV *data = (SV *)S_GENSUB_ARG;
2237
2238 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2239 {
2240 /* first call, set args */
2241 SV *coro = SvRV (data);
2242 AV *av = newAV ();
2243
2244 SvRV_set (data, (SV *)av);
2245
2246 /* better take a full copy of the arguments */
2247 while (items--)
2248 av_store (av, items, newSVsv (ST (items)));
2249
2250 api_ready (aTHX_ coro);
2251 SvREFCNT_dec (coro);
2252 }
2253
2254 XSRETURN_EMPTY;
2255}
2256
2257static int
2258slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2259{
2260 SV *data = (SV *)frame->data;
2261
2262 if (CORO_THROW)
2263 return 0;
2264
2265 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2266 return 1;
2267
2268 /* now push all results on the stack */
2269 {
2270 dSP;
2271 AV *av = (AV *)SvRV (data);
2272 int i;
2273
2274 EXTEND (SP, AvFILLp (av) + 1);
2275 for (i = 0; i <= AvFILLp (av); ++i)
2276 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2277
2278 /* we have stolen the elements, so set length to zero and free */
2279 AvFILLp (av) = -1;
2280 av_undef (av);
2281
2282 PUTBACK;
2283 }
2284
2285 return 0;
2286}
2287
2288static void
2289slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2290{
2291 SV *cb;
2292
2293 if (items)
2294 cb = arg [0];
2295 else
2296 {
2297 struct coro *coro = SvSTATE_current;
2298
2299 if (!coro->rouse_cb)
2300 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2301
2302 cb = sv_2mortal (coro->rouse_cb);
2303 coro->rouse_cb = 0;
2304 }
2305
2306 if (!SvROK (cb)
2307 || SvTYPE (SvRV (cb)) != SVt_PVCV
2308 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2309 croak ("Coro::rouse_wait called with illegal callback argument,");
2310
2311 {
2312 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2313 SV *data = (SV *)S_GENSUB_ARG;
2314
2315 frame->data = (void *)data;
2316 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2317 frame->check = slf_check_rouse_wait;
2318 }
2319}
2320
2321static SV *
2322coro_new_rouse_cb (pTHX)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv (hv);
2326 SV *data = newRV_inc ((SV *)hv);
2327 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2328
2329 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2330 SvREFCNT_dec (data); /* magicext increases the refcount */
2331
2332 SvREFCNT_dec (coro->rouse_cb);
2333 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2334
2335 return cb;
2336}
2337
2338/*****************************************************************************/
2339/* schedule-like-function opcode (SLF) */
2340
2341static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2342static const CV *slf_cv;
2343static SV **slf_argv;
2344static int slf_argc, slf_arga; /* count, allocated */
2345static I32 slf_ax; /* top of stack, for restore */
2346
2347/* this restores the stack in the case we patched the entersub, to */
2348/* recreate the stack frame as perl will on following calls */
2349/* since entersub cleared the stack */
2350static OP *
2351pp_restore (pTHX)
2352{
2353 int i;
2354 SV **SP = PL_stack_base + slf_ax;
2355
2356 PUSHMARK (SP);
2357
2358 EXTEND (SP, slf_argc + 1);
2359
2360 for (i = 0; i < slf_argc; ++i)
2361 PUSHs (sv_2mortal (slf_argv [i]));
2362
2363 PUSHs ((SV *)CvGV (slf_cv));
2364
2365 RETURNOP (slf_restore.op_first);
2366}
2367
2368static void
2369slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2370{
2371 SV **arg = (SV **)slf_frame.data;
2372
2373 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2374}
2375
2376static void
2377slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items != 2)
2380 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2381
2382 frame->prepare = slf_prepare_transfer;
2383 frame->check = slf_check_nop;
2384 frame->data = (void *)arg; /* let's hope it will stay valid */
2385}
2386
2387static void
2388slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2389{
2390 frame->prepare = prepare_schedule;
2391 frame->check = slf_check_nop;
2392}
2393
2394static void
2395slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2396{
2397 struct coro *next = (struct coro *)slf_frame.data;
2398
2399 SvREFCNT_inc_NN (next->hv);
2400 prepare_schedule_to (aTHX_ ta, next);
2401}
2402
2403static void
2404slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 if (!items)
2407 croak ("Coro::schedule_to expects a coroutine argument, caught");
2408
2409 frame->data = (void *)SvSTATE (arg [0]);
2410 frame->prepare = slf_prepare_schedule_to;
2411 frame->check = slf_check_nop;
2412}
2413
2414static void
2415slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2416{
2417 api_ready (aTHX_ SvRV (coro_current));
2418
2419 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2420}
2421
2422static void
2423slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 frame->prepare = prepare_cede;
2426 frame->check = slf_check_nop;
2427}
2428
2429static void
2430slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2431{
2432 frame->prepare = prepare_cede_notself;
2433 frame->check = slf_check_nop;
2434}
2435
2436/*
2437 * these not obviously related functions are all rolled into one
2438 * function to increase chances that they all will call transfer with the same
2439 * stack offset
2440 * SLF stands for "schedule-like-function".
2441 */
2442static OP *
2443pp_slf (pTHX)
2444{
2445 I32 checkmark; /* mark SP to see how many elements check has pushed */
2446
2447 /* set up the slf frame, unless it has already been set-up */
2448 /* the latter happens when a new coro has been started */
2449 /* or when a new cctx was attached to an existing coroutine */
2450 if (expect_true (!slf_frame.prepare))
2451 {
2452 /* first iteration */
2453 dSP;
2454 SV **arg = PL_stack_base + TOPMARK + 1;
2455 int items = SP - arg; /* args without function object */
2456 SV *gv = *sp;
2457
2458 /* do a quick consistency check on the "function" object, and if it isn't */
2459 /* for us, divert to the real entersub */
2460 if (SvTYPE (gv) != SVt_PVGV
2461 || !GvCV (gv)
2462 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2463 return PL_ppaddr[OP_ENTERSUB](aTHX);
2464
2465 if (!(PL_op->op_flags & OPf_STACKED))
2466 {
2467 /* ampersand-form of call, use @_ instead of stack */
2468 AV *av = GvAV (PL_defgv);
2469 arg = AvARRAY (av);
2470 items = AvFILLp (av) + 1;
2471 }
2472
2473 /* now call the init function, which needs to set up slf_frame */
2474 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2475 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2476
2477 /* pop args */
2478 SP = PL_stack_base + POPMARK;
2479
2480 PUTBACK;
2481 }
2482
2483 /* now that we have a slf_frame, interpret it! */
2484 /* we use a callback system not to make the code needlessly */
2485 /* complicated, but so we can run multiple perl coros from one cctx */
2486
2487 do
2488 {
2489 struct coro_transfer_args ta;
2490
2491 slf_frame.prepare (aTHX_ &ta);
2492 TRANSFER (ta, 0);
2493
2494 checkmark = PL_stack_sp - PL_stack_base;
2495 }
2496 while (slf_frame.check (aTHX_ &slf_frame));
2497
2498 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2499
2500 /* exception handling */
2501 if (expect_false (CORO_THROW))
2502 {
2503 SV *exception = sv_2mortal (CORO_THROW);
2504
2505 CORO_THROW = 0;
2506 sv_setsv (ERRSV, exception);
2507 croak (0);
2508 }
2509
2510 /* return value handling - mostly like entersub */
2511 /* make sure we put something on the stack in scalar context */
2512 if (GIMME_V == G_SCALAR)
2513 {
2514 dSP;
2515 SV **bot = PL_stack_base + checkmark;
2516
2517 if (sp == bot) /* too few, push undef */
2518 bot [1] = &PL_sv_undef;
2519 else if (sp != bot + 1) /* too many, take last one */
2520 bot [1] = *sp;
2521
2522 SP = bot + 1;
2523
2524 PUTBACK;
2525 }
2526
2527 return NORMAL;
2528}
2529
2530static void
2531api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2532{
2533 int i;
2534 SV **arg = PL_stack_base + ax;
2535 int items = PL_stack_sp - arg + 1;
2536
2537 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2538
2539 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2540 && PL_op->op_ppaddr != pp_slf)
2541 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2542
2543 CvFLAGS (cv) |= CVf_SLF;
2544 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2545 slf_cv = cv;
2546
2547 /* we patch the op, and then re-run the whole call */
2548 /* we have to put the same argument on the stack for this to work */
2549 /* and this will be done by pp_restore */
2550 slf_restore.op_next = (OP *)&slf_restore;
2551 slf_restore.op_type = OP_CUSTOM;
2552 slf_restore.op_ppaddr = pp_restore;
2553 slf_restore.op_first = PL_op;
2554
2555 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2556
2557 if (PL_op->op_flags & OPf_STACKED)
2558 {
2559 if (items > slf_arga)
2560 {
2561 slf_arga = items;
2562 Safefree (slf_argv);
2563 New (0, slf_argv, slf_arga, SV *);
2564 }
2565
2566 slf_argc = items;
2567
2568 for (i = 0; i < items; ++i)
2569 slf_argv [i] = SvREFCNT_inc (arg [i]);
2570 }
2571 else
2572 slf_argc = 0;
2573
2574 PL_op->op_ppaddr = pp_slf;
2575 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2576
2577 PL_op = (OP *)&slf_restore;
2578}
2579
2580/*****************************************************************************/
2581/* dynamic wind */
2582
2583static void
2584on_enterleave_call (pTHX_ SV *cb)
2585{
2586 dSP;
2587
2588 PUSHSTACK;
2589
2590 PUSHMARK (SP);
2591 PUTBACK;
2592 call_sv (cb, G_VOID | G_DISCARD);
2593 SPAGAIN;
2594
2595 POPSTACK;
2596}
2597
2598static SV *
2599coro_avp_pop_and_free (pTHX_ AV **avp)
2600{
2601 AV *av = *avp;
2602 SV *res = av_pop (av);
2603
2604 if (AvFILLp (av) < 0)
2605 {
2606 *avp = 0;
2607 SvREFCNT_dec (av);
2608 }
2609
2610 return res;
2611}
2612
2613static void
2614coro_pop_on_enter (pTHX_ void *coro)
2615{
2616 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2617 SvREFCNT_dec (cb);
2618}
2619
2620static void
2621coro_pop_on_leave (pTHX_ void *coro)
2622{
2623 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2624 on_enterleave_call (aTHX_ sv_2mortal (cb));
2625}
2626
2627/*****************************************************************************/
2628/* PerlIO::cede */
2629
2630typedef struct
2631{
2632 PerlIOBuf base;
2633 NV next, every;
2634} PerlIOCede;
2635
2636static IV
2637PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2638{
2639 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2640
2641 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2642 self->next = nvtime () + self->every;
2643
2644 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2645}
2646
2647static SV *
2648PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2649{
2650 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2651
2652 return newSVnv (self->every);
2653}
2654
2655static IV
2656PerlIOCede_flush (pTHX_ PerlIO *f)
2657{
2658 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2659 double now = nvtime ();
2660
2661 if (now >= self->next)
2662 {
2663 api_cede (aTHX);
2664 self->next = now + self->every;
2665 }
2666
2667 return PerlIOBuf_flush (aTHX_ f);
2668}
2669
2670static PerlIO_funcs PerlIO_cede =
2671{
2672 sizeof(PerlIO_funcs),
2673 "cede",
2674 sizeof(PerlIOCede),
2675 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2676 PerlIOCede_pushed,
2677 PerlIOBuf_popped,
2678 PerlIOBuf_open,
2679 PerlIOBase_binmode,
2680 PerlIOCede_getarg,
2681 PerlIOBase_fileno,
2682 PerlIOBuf_dup,
2683 PerlIOBuf_read,
2684 PerlIOBuf_unread,
2685 PerlIOBuf_write,
2686 PerlIOBuf_seek,
2687 PerlIOBuf_tell,
2688 PerlIOBuf_close,
2689 PerlIOCede_flush,
2690 PerlIOBuf_fill,
2691 PerlIOBase_eof,
2692 PerlIOBase_error,
2693 PerlIOBase_clearerr,
2694 PerlIOBase_setlinebuf,
2695 PerlIOBuf_get_base,
2696 PerlIOBuf_bufsiz,
2697 PerlIOBuf_get_ptr,
2698 PerlIOBuf_get_cnt,
2699 PerlIOBuf_set_ptrcnt,
2700};
2701
2702/*****************************************************************************/
2703/* Coro::Semaphore & Coro::Signal */
2704
2705static SV *
2706coro_waitarray_new (pTHX_ int count)
2707{
2708 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 SV **ary;
2711
2712 /* unfortunately, building manually saves memory */
2713 Newx (ary, 2, SV *);
2714 AvALLOC (av) = ary;
2715#if PERL_VERSION_ATLEAST (5,10,0)
2716 AvARRAY (av) = ary;
2717#else
2718 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2719 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2720 SvPVX ((SV *)av) = (char *)ary;
2721#endif
2722 AvMAX (av) = 1;
2723 AvFILLp (av) = 0;
2724 ary [0] = newSViv (count);
2725
2726 return newRV_noinc ((SV *)av);
2727}
2728
2729/* semaphore */
2730
2731static void
2732coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2733{
2734 SV *count_sv = AvARRAY (av)[0];
2735 IV count = SvIVX (count_sv);
2736
2737 count += adjust;
2738 SvIVX (count_sv) = count;
2739
2740 /* now wake up as many waiters as are expected to lock */
2741 while (count > 0 && AvFILLp (av) > 0)
2742 {
2743 SV *cb;
2744
2745 /* swap first two elements so we can shift a waiter */
2746 AvARRAY (av)[0] = AvARRAY (av)[1];
2747 AvARRAY (av)[1] = count_sv;
2748 cb = av_shift (av);
2749
2750 if (SvOBJECT (cb))
2751 {
2752 api_ready (aTHX_ cb);
2753 --count;
2754 }
2755 else if (SvTYPE (cb) == SVt_PVCV)
2756 {
2757 dSP;
2758 PUSHMARK (SP);
2759 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2760 PUTBACK;
2761 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2762 }
2763
2764 SvREFCNT_dec (cb);
2765 }
2766}
2767
2768static void
2769coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2770{
2771 /* call $sem->adjust (0) to possibly wake up some other waiters */
2772 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2773}
2774
2775static int
2776slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2777{
2778 AV *av = (AV *)frame->data;
2779 SV *count_sv = AvARRAY (av)[0];
2780
2781 /* if we are about to throw, don't actually acquire the lock, just throw */
2782 if (CORO_THROW)
2783 return 0;
2784 else if (SvIVX (count_sv) > 0)
2785 {
2786 SvSTATE_current->on_destroy = 0;
2787
2788 if (acquire)
2789 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2790 else
2791 coro_semaphore_adjust (aTHX_ av, 0);
2792
2793 return 0;
2794 }
2795 else
2796 {
2797 int i;
2798 /* if we were woken up but can't down, we look through the whole */
2799 /* waiters list and only add us if we aren't in there already */
2800 /* this avoids some degenerate memory usage cases */
2801
2802 for (i = 1; i <= AvFILLp (av); ++i)
2803 if (AvARRAY (av)[i] == SvRV (coro_current))
2804 return 1;
2805
2806 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2807 return 1;
2808 }
2809}
2810
2811static int
2812slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2813{
2814 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2815}
2816
2817static int
2818slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2819{
2820 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2821}
2822
2823static void
2824slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2825{
2826 AV *av = (AV *)SvRV (arg [0]);
2827
2828 if (SvIVX (AvARRAY (av)[0]) > 0)
2829 {
2830 frame->data = (void *)av;
2831 frame->prepare = prepare_nop;
2832 }
2833 else
2834 {
2835 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2836
2837 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2838 frame->prepare = prepare_schedule;
2839
2840 /* to avoid race conditions when a woken-up coro gets terminated */
2841 /* we arrange for a temporary on_destroy that calls adjust (0) */
2842 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2843 }
2844}
2845
2846static void
2847slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2848{
2849 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2850 frame->check = slf_check_semaphore_down;
2851}
2852
2853static void
2854slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2855{
2856 if (items >= 2)
2857 {
2858 /* callback form */
2859 AV *av = (AV *)SvRV (arg [0]);
2860 SV *cb_cv = s_get_cv_croak (arg [1]);
2861
2862 av_push (av, SvREFCNT_inc_NN (cb_cv));
2863
2864 if (SvIVX (AvARRAY (av)[0]) > 0)
2865 coro_semaphore_adjust (aTHX_ av, 0);
2866
2867 frame->prepare = prepare_nop;
2868 frame->check = slf_check_nop;
2869 }
2870 else
2871 {
2872 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2873 frame->check = slf_check_semaphore_wait;
2874 }
2875}
2876
2877/* signal */
2878
2879static void
2880coro_signal_wake (pTHX_ AV *av, int count)
2881{
2882 SvIVX (AvARRAY (av)[0]) = 0;
2883
2884 /* now signal count waiters */
2885 while (count > 0 && AvFILLp (av) > 0)
2886 {
2887 SV *cb;
2888
2889 /* swap first two elements so we can shift a waiter */
2890 cb = AvARRAY (av)[0];
2891 AvARRAY (av)[0] = AvARRAY (av)[1];
2892 AvARRAY (av)[1] = cb;
2893
2894 cb = av_shift (av);
2895
2896 if (SvTYPE (cb) == SVt_PVCV)
2897 {
2898 dSP;
2899 PUSHMARK (SP);
2900 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2901 PUTBACK;
2902 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2903 }
2904 else
2905 {
2906 api_ready (aTHX_ cb);
2907 sv_setiv (cb, 0); /* signal waiter */
2908 }
2909
2910 SvREFCNT_dec (cb);
2911
2912 --count;
2913 }
2914}
2915
2916static int
2917slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2918{
2919 /* if we are about to throw, also stop waiting */
2920 return SvROK ((SV *)frame->data) && !CORO_THROW;
2921}
2922
2923static void
2924slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2925{
2926 AV *av = (AV *)SvRV (arg [0]);
2927
2928 if (items >= 2)
2929 {
2930 SV *cb_cv = s_get_cv_croak (arg [1]);
2931 av_push (av, SvREFCNT_inc_NN (cb_cv));
2932
2933 if (SvIVX (AvARRAY (av)[0]))
2934 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2935
2936 frame->prepare = prepare_nop;
2937 frame->check = slf_check_nop;
2938 }
2939 else if (SvIVX (AvARRAY (av)[0]))
2940 {
2941 SvIVX (AvARRAY (av)[0]) = 0;
2942 frame->prepare = prepare_nop;
2943 frame->check = slf_check_nop;
2944 }
2945 else
2946 {
2947 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2948
2949 av_push (av, waiter);
2950
2951 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2952 frame->prepare = prepare_schedule;
2953 frame->check = slf_check_signal_wait;
2954 }
2955}
2956
2957/*****************************************************************************/
2958/* Coro::AIO */
2959
2960#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2961
2962/* helper storage struct */
2963struct io_state
2964{
2965 int errorno;
2966 I32 laststype; /* U16 in 5.10.0 */
2967 int laststatval;
2968 Stat_t statcache;
2969};
2970
2971static void
2972coro_aio_callback (pTHX_ CV *cv)
2973{
2974 dXSARGS;
2975 AV *state = (AV *)S_GENSUB_ARG;
2976 SV *coro = av_pop (state);
2977 SV *data_sv = newSV (sizeof (struct io_state));
2978
2979 av_extend (state, items - 1);
2980
2981 sv_upgrade (data_sv, SVt_PV);
2982 SvCUR_set (data_sv, sizeof (struct io_state));
2983 SvPOK_only (data_sv);
2984
2985 {
2986 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2987
2988 data->errorno = errno;
2989 data->laststype = PL_laststype;
2990 data->laststatval = PL_laststatval;
2991 data->statcache = PL_statcache;
2992 }
2993
2994 /* now build the result vector out of all the parameters and the data_sv */
2995 {
2996 int i;
2997
2998 for (i = 0; i < items; ++i)
2999 av_push (state, SvREFCNT_inc_NN (ST (i)));
3000 }
3001
3002 av_push (state, data_sv);
3003
3004 api_ready (aTHX_ coro);
3005 SvREFCNT_dec (coro);
3006 SvREFCNT_dec ((AV *)state);
3007}
3008
3009static int
3010slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3011{
3012 AV *state = (AV *)frame->data;
3013
3014 /* if we are about to throw, return early */
3015 /* this does not cancel the aio request, but at least */
3016 /* it quickly returns */
3017 if (CORO_THROW)
3018 return 0;
3019
3020 /* one element that is an RV? repeat! */
3021 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3022 return 1;
3023
3024 /* restore status */
3025 {
3026 SV *data_sv = av_pop (state);
3027 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3028
3029 errno = data->errorno;
3030 PL_laststype = data->laststype;
3031 PL_laststatval = data->laststatval;
3032 PL_statcache = data->statcache;
3033
3034 SvREFCNT_dec (data_sv);
3035 }
3036
3037 /* push result values */
3038 {
3039 dSP;
3040 int i;
3041
3042 EXTEND (SP, AvFILLp (state) + 1);
3043 for (i = 0; i <= AvFILLp (state); ++i)
3044 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3045
3046 PUTBACK;
3047 }
3048
3049 return 0;
3050}
3051
3052static void
3053slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3054{
3055 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3056 SV *coro_hv = SvRV (coro_current);
3057 struct coro *coro = SvSTATE_hv (coro_hv);
3058
3059 /* put our coroutine id on the state arg */
3060 av_push (state, SvREFCNT_inc_NN (coro_hv));
3061
3062 /* first see whether we have a non-zero priority and set it as AIO prio */
3063 if (coro->prio)
3064 {
3065 dSP;
3066
3067 static SV *prio_cv;
3068 static SV *prio_sv;
3069
3070 if (expect_false (!prio_cv))
3071 {
3072 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3073 prio_sv = newSViv (0);
3074 }
3075
3076 PUSHMARK (SP);
3077 sv_setiv (prio_sv, coro->prio);
3078 XPUSHs (prio_sv);
3079
3080 PUTBACK;
3081 call_sv (prio_cv, G_VOID | G_DISCARD);
3082 }
3083
3084 /* now call the original request */
3085 {
3086 dSP;
3087 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3088 int i;
3089
3090 PUSHMARK (SP);
3091
3092 /* first push all args to the stack */
3093 EXTEND (SP, items + 1);
3094
3095 for (i = 0; i < items; ++i)
3096 PUSHs (arg [i]);
3097
3098 /* now push the callback closure */
3099 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3100
3101 /* now call the AIO function - we assume our request is uncancelable */
3102 PUTBACK;
3103 call_sv ((SV *)req, G_VOID | G_DISCARD);
3104 }
3105
3106 /* now that the request is going, we loop till we have a result */
3107 frame->data = (void *)state;
3108 frame->prepare = prepare_schedule;
3109 frame->check = slf_check_aio_req;
3110}
3111
3112static void
3113coro_aio_req_xs (pTHX_ CV *cv)
3114{
3115 dXSARGS;
3116
3117 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3118
3119 XSRETURN_EMPTY;
3120}
3121
3122/*****************************************************************************/
3123
3124#if CORO_CLONE
3125# include "clone.c"
3126#endif
3127
3128/*****************************************************************************/
3129
3130static SV *
3131coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3132{
3133 SV *coro_sv;
3134 struct coro *coro;
3135 MAGIC *mg;
3136 HV *hv;
3137 SV *cb;
3138 int i;
3139
3140 if (argc > 0)
3141 {
3142 cb = s_get_cv_croak (argv [0]);
3143
3144 if (!is_coro)
3145 {
3146 if (CvISXSUB (cb))
3147 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3148
3149 if (!CvROOT (cb))
3150 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3151 }
3152 }
3153
3154 Newz (0, coro, 1, struct coro);
3155 coro->args = newAV ();
3156 coro->flags = CF_NEW;
3157
3158 if (coro_first) coro_first->prev = coro;
3159 coro->next = coro_first;
3160 coro_first = coro;
3161
3162 coro->hv = hv = newHV ();
3163 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3164 mg->mg_flags |= MGf_DUP;
3165 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3166
3167 if (argc > 0)
3168 {
3169 av_extend (coro->args, argc + is_coro - 1);
3170
3171 if (is_coro)
3172 {
3173 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3174 cb = (SV *)cv_coro_run;
3175 }
3176
3177 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3178
3179 for (i = 1; i < argc; i++)
3180 av_push (coro->args, newSVsv (argv [i]));
3181 }
3182
3183 return coro_sv;
1370} 3184}
1371 3185
1372MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3186MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1373 3187
1374PROTOTYPES: DISABLE 3188PROTOTYPES: DISABLE
1375 3189
1376BOOT: 3190BOOT:
1377{ 3191{
1378#ifdef USE_ITHREADS 3192#ifdef USE_ITHREADS
1379 MUTEX_INIT (&coro_mutex); 3193# if CORO_PTHREAD
3194 coro_thx = PERL_GET_CONTEXT;
3195# endif
1380#endif 3196#endif
1381 BOOT_PAGESIZE; 3197 BOOT_PAGESIZE;
1382 3198
3199 cctx_current = cctx_new_empty ();
3200
1383 irsgv = gv_fetchpv ("/" , GV_ADD, SVt_PV); 3201 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1384 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD, SVt_PVIO); 3202 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3203
3204 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3205 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3206 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3207
3208 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3209 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3210 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1385 3211
1386 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3212 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1387 3213
1388 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3214 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1389 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3215 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1394 main_top_env = PL_top_env; 3220 main_top_env = PL_top_env;
1395 3221
1396 while (main_top_env->je_prev) 3222 while (main_top_env->je_prev)
1397 main_top_env = main_top_env->je_prev; 3223 main_top_env = main_top_env->je_prev;
1398 3224
3225 {
3226 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3227
3228 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3229 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3230
3231 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3232 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3233 }
3234
1399 coroapi.ver = CORO_API_VERSION; 3235 coroapi.ver = CORO_API_VERSION;
3236 coroapi.rev = CORO_API_REVISION;
3237
1400 coroapi.transfer = api_transfer; 3238 coroapi.transfer = api_transfer;
1401 3239
3240 coroapi.sv_state = SvSTATE_;
3241 coroapi.execute_slf = api_execute_slf;
3242 coroapi.prepare_nop = prepare_nop;
3243 coroapi.prepare_schedule = prepare_schedule;
3244 coroapi.prepare_cede = prepare_cede;
3245 coroapi.prepare_cede_notself = prepare_cede_notself;
3246
3247 time_init (aTHX);
3248
1402 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3249 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1403} 3250}
1404 3251
1405SV * 3252SV *
1406new (char *klass, ...) 3253new (SV *klass, ...)
3254 ALIAS:
3255 Coro::new = 1
1407 CODE: 3256 CODE:
1408{ 3257 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1409 struct coro *coro;
1410 HV *hv;
1411 int i;
1412
1413 Newz (0, coro, 1, struct coro);
1414 coro->args = newAV ();
1415 coro->flags = CF_NEW;
1416
1417 if (coro_first) coro_first->prev = coro;
1418 coro->next = coro_first;
1419 coro_first = coro;
1420
1421 coro->hv = hv = newHV ();
1422 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1423 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1424
1425 for (i = 1; i < items; i++)
1426 av_push (coro->args, newSVsv (ST (i)));
1427}
1428 OUTPUT:
1429 RETVAL
1430
1431# these not obviously related functions are all rolled into the same xs
1432# function to increase chances that they all will call transfer with the same
1433# stack offset
1434void
1435_set_stacklevel (...)
1436 ALIAS:
1437 Coro::State::transfer = 1
1438 Coro::schedule = 2
1439 Coro::cede = 3
1440 Coro::cede_notself = 4
1441 CODE:
1442{
1443 struct transfer_args ta;
1444
1445 switch (ix)
1446 {
1447 case 0:
1448 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1449 ta.next = 0;
1450 break;
1451
1452 case 1:
1453 if (items != 2)
1454 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1455
1456 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1457 break;
1458
1459 case 2:
1460 prepare_schedule (aTHX_ &ta);
1461 break;
1462
1463 case 3:
1464 prepare_cede (aTHX_ &ta);
1465 break;
1466
1467 case 4:
1468 if (!prepare_cede_notself (aTHX_ &ta))
1469 XSRETURN_EMPTY;
1470
1471 break;
1472 }
1473
1474 BARRIER;
1475 TRANSFER (ta);
1476
1477 if (GIMME_V != G_VOID && ta.next != ta.prev)
1478 XSRETURN_YES;
1479}
1480
1481bool
1482_destroy (SV *coro_sv)
1483 CODE:
1484 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1485 OUTPUT: 3258 OUTPUT:
1486 RETVAL 3259 RETVAL
1487 3260
1488void 3261void
3262transfer (...)
3263 PROTOTYPE: $$
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3266
3267void
1489_exit (code) 3268_exit (int code)
1490 int code
1491 PROTOTYPE: $ 3269 PROTOTYPE: $
1492 CODE: 3270 CODE:
1493 _exit (code); 3271 _exit (code);
1494 3272
3273SV *
3274clone (Coro::State coro)
3275 CODE:
3276{
3277#if CORO_CLONE
3278 struct coro *ncoro = coro_clone (aTHX_ coro);
3279 MAGIC *mg;
3280 /* TODO: too much duplication */
3281 ncoro->hv = newHV ();
3282 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3283 mg->mg_flags |= MGf_DUP;
3284 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3285#else
3286 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3287#endif
3288}
3289 OUTPUT:
3290 RETVAL
3291
1495int 3292int
1496cctx_stacksize (int new_stacksize = 0) 3293cctx_stacksize (int new_stacksize = 0)
3294 PROTOTYPE: ;$
1497 CODE: 3295 CODE:
1498 RETVAL = coro_stacksize; 3296 RETVAL = cctx_stacksize;
1499 if (new_stacksize) 3297 if (new_stacksize)
3298 {
1500 coro_stacksize = new_stacksize; 3299 cctx_stacksize = new_stacksize;
3300 ++cctx_gen;
3301 }
1501 OUTPUT: 3302 OUTPUT:
1502 RETVAL 3303 RETVAL
1503 3304
1504int 3305int
3306cctx_max_idle (int max_idle = 0)
3307 PROTOTYPE: ;$
3308 CODE:
3309 RETVAL = cctx_max_idle;
3310 if (max_idle > 1)
3311 cctx_max_idle = max_idle;
3312 OUTPUT:
3313 RETVAL
3314
3315int
1505cctx_count () 3316cctx_count ()
3317 PROTOTYPE:
1506 CODE: 3318 CODE:
1507 RETVAL = cctx_count; 3319 RETVAL = cctx_count;
1508 OUTPUT: 3320 OUTPUT:
1509 RETVAL 3321 RETVAL
1510 3322
1511int 3323int
1512cctx_idle () 3324cctx_idle ()
3325 PROTOTYPE:
1513 CODE: 3326 CODE:
1514 RETVAL = cctx_idle; 3327 RETVAL = cctx_idle;
1515 OUTPUT: 3328 OUTPUT:
1516 RETVAL 3329 RETVAL
1517 3330
1518void 3331void
1519list () 3332list ()
3333 PROTOTYPE:
1520 PPCODE: 3334 PPCODE:
1521{ 3335{
1522 struct coro *coro; 3336 struct coro *coro;
1523 for (coro = coro_first; coro; coro = coro->next) 3337 for (coro = coro_first; coro; coro = coro->next)
1524 if (coro->hv) 3338 if (coro->hv)
… …
1529call (Coro::State coro, SV *coderef) 3343call (Coro::State coro, SV *coderef)
1530 ALIAS: 3344 ALIAS:
1531 eval = 1 3345 eval = 1
1532 CODE: 3346 CODE:
1533{ 3347{
1534 if (coro->mainstack) 3348 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1535 { 3349 {
1536 struct coro temp; 3350 struct coro *current = SvSTATE_current;
1537 Zero (&temp, 1, struct coro); 3351 struct CoroSLF slf_save;
1538 3352
1539 if (!(coro->flags & CF_RUNNING)) 3353 if (current != coro)
1540 { 3354 {
3355 PUTBACK;
1541 save_perl (aTHX_ &temp); 3356 save_perl (aTHX_ current);
1542 load_perl (aTHX_ coro); 3357 load_perl (aTHX_ coro);
3358 /* the coro is most likely in an active SLF call.
3359 * while not strictly required (the code we execute is
3360 * not allowed to call any SLF functions), it's cleaner
3361 * to reinitialise the slf_frame and restore it later.
3362 * This might one day allow us to actually do SLF calls
3363 * from code executed here.
3364 */
3365 slf_save = slf_frame;
3366 slf_frame.prepare = 0;
3367 SPAGAIN;
1543 } 3368 }
1544 3369
1545 { 3370 PUSHSTACK;
1546 dSP; 3371
1547 ENTER;
1548 SAVETMPS;
1549 PUSHMARK (SP); 3372 PUSHMARK (SP);
1550 PUTBACK; 3373 PUTBACK;
3374
1551 if (ix) 3375 if (ix)
1552 eval_sv (coderef, 0); 3376 eval_sv (coderef, 0);
1553 else 3377 else
1554 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3378 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3379
3380 POPSTACK;
1555 SPAGAIN; 3381 SPAGAIN;
1556 FREETMPS;
1557 LEAVE;
1558 PUTBACK;
1559 }
1560 3382
1561 if (!(coro->flags & CF_RUNNING)) 3383 if (current != coro)
1562 { 3384 {
3385 PUTBACK;
3386 slf_frame = slf_save;
1563 save_perl (aTHX_ coro); 3387 save_perl (aTHX_ coro);
1564 load_perl (aTHX_ &temp); 3388 load_perl (aTHX_ current);
3389 SPAGAIN;
1565 } 3390 }
1566 } 3391 }
1567} 3392}
1568 3393
1569SV * 3394SV *
… …
1572 ALIAS: 3397 ALIAS:
1573 is_ready = CF_READY 3398 is_ready = CF_READY
1574 is_running = CF_RUNNING 3399 is_running = CF_RUNNING
1575 is_new = CF_NEW 3400 is_new = CF_NEW
1576 is_destroyed = CF_DESTROYED 3401 is_destroyed = CF_DESTROYED
3402 is_suspended = CF_SUSPENDED
1577 CODE: 3403 CODE:
1578 RETVAL = boolSV (coro->flags & ix); 3404 RETVAL = boolSV (coro->flags & ix);
1579 OUTPUT: 3405 OUTPUT:
1580 RETVAL 3406 RETVAL
1581 3407
1582void 3408void
3409throw (Coro::State self, SV *exception = &PL_sv_undef)
3410 PROTOTYPE: $;$
3411 CODE:
3412{
3413 struct coro *current = SvSTATE_current;
3414 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3415 SvREFCNT_dec (*exceptionp);
3416 SvGETMAGIC (exception);
3417 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3418}
3419
3420void
1583api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3421api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3422 PROTOTYPE: $;$
3423 C_ARGS: aTHX_ coro, flags
1584 3424
1585SV * 3425SV *
1586has_stack (Coro::State coro) 3426has_cctx (Coro::State coro)
1587 PROTOTYPE: $ 3427 PROTOTYPE: $
1588 CODE: 3428 CODE:
1589 RETVAL = boolSV (!!coro->cctx); 3429 /* maybe manage the running flag differently */
3430 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1590 OUTPUT: 3431 OUTPUT:
1591 RETVAL 3432 RETVAL
1592 3433
1593int 3434int
1594is_traced (Coro::State coro) 3435is_traced (Coro::State coro)
… …
1596 CODE: 3437 CODE:
1597 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3438 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1598 OUTPUT: 3439 OUTPUT:
1599 RETVAL 3440 RETVAL
1600 3441
1601IV 3442UV
1602rss (Coro::State coro) 3443rss (Coro::State coro)
1603 PROTOTYPE: $ 3444 PROTOTYPE: $
1604 ALIAS: 3445 ALIAS:
1605 usecount = 1 3446 usecount = 1
1606 CODE: 3447 CODE:
… …
1610 case 1: RETVAL = coro->usecount; break; 3451 case 1: RETVAL = coro->usecount; break;
1611 } 3452 }
1612 OUTPUT: 3453 OUTPUT:
1613 RETVAL 3454 RETVAL
1614 3455
3456void
3457force_cctx ()
3458 PROTOTYPE:
3459 CODE:
3460 cctx_current->idle_sp = 0;
3461
3462void
3463swap_defsv (Coro::State self)
3464 PROTOTYPE: $
3465 ALIAS:
3466 swap_defav = 1
3467 CODE:
3468 if (!self->slot)
3469 croak ("cannot swap state with coroutine that has no saved state,");
3470 else
3471 {
3472 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3473 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3474
3475 SV *tmp = *src; *src = *dst; *dst = tmp;
3476 }
3477
3478void
3479cancel (Coro::State self)
3480 CODE:
3481 coro_state_destroy (aTHX_ self);
3482
3483SV *
3484enable_times (int enabled = enable_times)
3485 CODE:
3486{
3487 RETVAL = boolSV (enable_times);
3488
3489 if (enabled != enable_times)
3490 {
3491 enable_times = enabled;
3492
3493 coro_times_update ();
3494 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3495 }
3496}
3497 OUTPUT:
3498 RETVAL
3499
3500void
3501times (Coro::State self)
3502 PPCODE:
3503{
3504 struct coro *current = SvSTATE (coro_current);
3505
3506 if (expect_false (current == self))
3507 {
3508 coro_times_update ();
3509 coro_times_add (SvSTATE (coro_current));
3510 }
3511
3512 EXTEND (SP, 2);
3513 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3514 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3515
3516 if (expect_false (current == self))
3517 coro_times_sub (SvSTATE (coro_current));
3518}
3519
3520void
3521swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3522 CODE:
3523{
3524 struct coro *current = SvSTATE_current;
3525
3526 if (current == coro)
3527 SWAP_SVS (current);
3528
3529 if (!coro->swap_sv)
3530 coro->swap_sv = newAV ();
3531
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3534
3535 if (current == coro)
3536 SWAP_SVS (current);
3537}
3538
1615 3539
1616MODULE = Coro::State PACKAGE = Coro 3540MODULE = Coro::State PACKAGE = Coro
1617 3541
1618BOOT: 3542BOOT:
1619{ 3543{
1620 int i;
1621
1622 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3544 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1623 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3545 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3546 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3547 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3548 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1624 av_async_pool = get_av ("Coro::async_pool", TRUE); 3549 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3550 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3551 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3552 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1625 3553
1626 coro_current = get_sv ("Coro::current", FALSE); 3554 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1627 SvREADONLY_on (coro_current); 3555 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1628 3556 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3557 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3558
1629 coro_stash = gv_stashpv ("Coro", TRUE); 3559 coro_stash = gv_stashpv ("Coro", TRUE);
1630 3560
1631 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3561 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1632 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3562 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1633 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3563 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1634 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3564 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1635 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3565 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1636 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3566 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1637
1638 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1639 coro_ready[i] = newAV ();
1640 3567
1641 { 3568 {
1642 SV *sv = perl_get_sv("Coro::API", 1); 3569 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1643 3570
1644 coroapi.schedule = api_schedule; 3571 coroapi.schedule = api_schedule;
3572 coroapi.schedule_to = api_schedule_to;
1645 coroapi.cede = api_cede; 3573 coroapi.cede = api_cede;
1646 coroapi.cede_notself = api_cede_notself; 3574 coroapi.cede_notself = api_cede_notself;
1647 coroapi.ready = api_ready; 3575 coroapi.ready = api_ready;
1648 coroapi.is_ready = api_is_ready; 3576 coroapi.is_ready = api_is_ready;
1649 coroapi.nready = &coro_nready; 3577 coroapi.nready = coro_nready;
1650 coroapi.current = coro_current; 3578 coroapi.current = coro_current;
1651 3579
1652 GCoroAPI = &coroapi; 3580 /*GCoroAPI = &coroapi;*/
1653 sv_setiv (sv, (IV)&coroapi); 3581 sv_setiv (sv, (IV)&coroapi);
1654 SvREADONLY_on (sv); 3582 SvREADONLY_on (sv);
1655 } 3583 }
1656} 3584}
3585
3586SV *
3587async (...)
3588 PROTOTYPE: &@
3589 CODE:
3590 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3591 api_ready (aTHX_ RETVAL);
3592 OUTPUT:
3593 RETVAL
3594
3595void
3596_destroy (Coro::State coro)
3597 CODE:
3598 /* used by the manager thread */
3599 coro_state_destroy (aTHX_ coro);
3600 coro_call_on_destroy (aTHX_ coro);
3601
3602void
3603terminate (...)
3604 CODE:
3605 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3606
3607void
3608cancel (...)
3609 CODE:
3610 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3611
3612void
3613schedule (...)
3614 CODE:
3615 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3616
3617void
3618schedule_to (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3621
3622void
3623cede_to (...)
3624 CODE:
3625 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3626
3627void
3628cede (...)
3629 CODE:
3630 CORO_EXECUTE_SLF_XS (slf_init_cede);
3631
3632void
3633cede_notself (...)
3634 CODE:
3635 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1657 3636
1658void 3637void
1659_set_current (SV *current) 3638_set_current (SV *current)
1660 PROTOTYPE: $ 3639 PROTOTYPE: $
1661 CODE: 3640 CODE:
1662 SvREFCNT_dec (SvRV (coro_current)); 3641 SvREFCNT_dec (SvRV (coro_current));
1663 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3642 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3643
3644void
3645_set_readyhook (SV *hook)
3646 PROTOTYPE: $
3647 CODE:
3648 SvREFCNT_dec (coro_readyhook);
3649 SvGETMAGIC (hook);
3650 if (SvOK (hook))
3651 {
3652 coro_readyhook = newSVsv (hook);
3653 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3654 }
3655 else
3656 {
3657 coro_readyhook = 0;
3658 CORO_READYHOOK = 0;
3659 }
1664 3660
1665int 3661int
1666prio (Coro::State coro, int newprio = 0) 3662prio (Coro::State coro, int newprio = 0)
3663 PROTOTYPE: $;$
1667 ALIAS: 3664 ALIAS:
1668 nice = 1 3665 nice = 1
1669 CODE: 3666 CODE:
1670{ 3667{
1671 RETVAL = coro->prio; 3668 RETVAL = coro->prio;
… …
1673 if (items > 1) 3670 if (items > 1)
1674 { 3671 {
1675 if (ix) 3672 if (ix)
1676 newprio = coro->prio - newprio; 3673 newprio = coro->prio - newprio;
1677 3674
1678 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3675 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1679 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3676 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1680 3677
1681 coro->prio = newprio; 3678 coro->prio = newprio;
1682 } 3679 }
1683} 3680}
1684 OUTPUT: 3681 OUTPUT:
… …
1686 3683
1687SV * 3684SV *
1688ready (SV *self) 3685ready (SV *self)
1689 PROTOTYPE: $ 3686 PROTOTYPE: $
1690 CODE: 3687 CODE:
1691 RETVAL = boolSV (api_ready (self)); 3688 RETVAL = boolSV (api_ready (aTHX_ self));
1692 OUTPUT: 3689 OUTPUT:
1693 RETVAL 3690 RETVAL
1694 3691
1695int 3692int
1696nready (...) 3693nready (...)
… …
1698 CODE: 3695 CODE:
1699 RETVAL = coro_nready; 3696 RETVAL = coro_nready;
1700 OUTPUT: 3697 OUTPUT:
1701 RETVAL 3698 RETVAL
1702 3699
1703# for async_pool speedup
1704void 3700void
1705_pool_1 (SV *cb) 3701suspend (Coro::State self)
3702 PROTOTYPE: $
1706 CODE: 3703 CODE:
1707{ 3704 self->flags |= CF_SUSPENDED;
1708 struct coro *coro = SvSTATE (coro_current);
1709 HV *hv = (HV *)SvRV (coro_current);
1710 AV *defav = GvAV (PL_defgv);
1711 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1712 AV *invoke_av;
1713 int i, len;
1714 3705
1715 if (!invoke) 3706void
1716 croak ("\3terminate\2\n"); 3707resume (Coro::State self)
3708 PROTOTYPE: $
3709 CODE:
3710 self->flags &= ~CF_SUSPENDED;
1717 3711
1718 SvREFCNT_dec (coro->saved_deffh); 3712void
1719 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3713_pool_handler (...)
3714 CODE:
3715 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1720 3716
1721 hv_store (hv, "desc", sizeof ("desc") - 1, 3717void
1722 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3718async_pool (SV *cv, ...)
3719 PROTOTYPE: &@
3720 PPCODE:
3721{
3722 HV *hv = (HV *)av_pop (av_async_pool);
3723 AV *av = newAV ();
3724 SV *cb = ST (0);
3725 int i;
1723 3726
1724 invoke_av = (AV *)SvRV (invoke); 3727 av_extend (av, items - 2);
1725 len = av_len (invoke_av); 3728 for (i = 1; i < items; ++i)
3729 av_push (av, SvREFCNT_inc_NN (ST (i)));
1726 3730
1727 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3731 if ((SV *)hv == &PL_sv_undef)
1728
1729 if (len > 0)
1730 { 3732 {
1731 av_fill (defav, len - 1); 3733 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1732 for (i = 0; i < len; ++i) 3734 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1733 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3735 SvREFCNT_dec (sv);
1734 } 3736 }
1735 3737
3738 {
3739 struct coro *coro = SvSTATE_hv (hv);
3740
3741 assert (!coro->invoke_cb);
3742 assert (!coro->invoke_av);
3743 coro->invoke_cb = SvREFCNT_inc (cb);
3744 coro->invoke_av = av;
3745 }
3746
3747 api_ready (aTHX_ (SV *)hv);
3748
3749 if (GIMME_V != G_VOID)
3750 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3751 else
1736 SvREFCNT_dec (invoke); 3752 SvREFCNT_dec (hv);
1737} 3753}
1738 3754
1739void 3755SV *
1740_pool_2 (SV *cb) 3756rouse_cb ()
3757 PROTOTYPE:
1741 CODE: 3758 CODE:
1742{ 3759 RETVAL = coro_new_rouse_cb (aTHX);
1743 struct coro *coro = SvSTATE (coro_current);
1744
1745 sv_setsv (cb, &PL_sv_undef);
1746
1747 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1748 coro->saved_deffh = 0;
1749
1750 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1751 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1752 croak ("\3terminate\2\n");
1753
1754 av_clear (GvAV (PL_defgv));
1755 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1756 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1757
1758 coro->prio = 0;
1759
1760 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1761 api_trace (coro_current, 0);
1762
1763 av_push (av_async_pool, newSVsv (coro_current));
1764}
1765
1766
1767MODULE = Coro::State PACKAGE = Coro::AIO
1768
1769SV *
1770_get_state ()
1771 CODE:
1772{
1773 struct io_state *data;
1774
1775 RETVAL = newSV (sizeof (struct io_state));
1776 data = (struct io_state *)SvPVX (RETVAL);
1777 SvCUR_set (RETVAL, sizeof (struct io_state));
1778 SvPOK_only (RETVAL);
1779
1780 data->errorno = errno;
1781 data->laststype = PL_laststype;
1782 data->laststatval = PL_laststatval;
1783 data->statcache = PL_statcache;
1784}
1785 OUTPUT: 3760 OUTPUT:
1786 RETVAL 3761 RETVAL
1787 3762
1788void 3763void
1789_set_state (char *data_) 3764rouse_wait (...)
3765 PROTOTYPE: ;$
3766 PPCODE:
3767 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3768
3769void
3770on_enter (SV *block)
3771 ALIAS:
3772 on_leave = 1
1790 PROTOTYPE: $ 3773 PROTOTYPE: &
1791 CODE: 3774 CODE:
1792{ 3775{
1793 struct io_state *data = (void *)data_; 3776 struct coro *coro = SvSTATE_current;
3777 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1794 3778
1795 errno = data->errorno; 3779 block = s_get_cv_croak (block);
1796 PL_laststype = data->laststype;
1797 PL_laststatval = data->laststatval;
1798 PL_statcache = data->statcache;
1799}
1800 3780
3781 if (!*avp)
3782 *avp = newAV ();
3783
3784 av_push (*avp, SvREFCNT_inc (block));
3785
3786 if (!ix)
3787 on_enterleave_call (aTHX_ block);
3788
3789 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3790 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3791 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3792}
3793
3794
3795MODULE = Coro::State PACKAGE = PerlIO::cede
3796
3797BOOT:
3798 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3799
3800
3801MODULE = Coro::State PACKAGE = Coro::Semaphore
3802
3803SV *
3804new (SV *klass, SV *count = 0)
3805 CODE:
3806{
3807 int semcnt = 1;
3808
3809 if (count)
3810 {
3811 SvGETMAGIC (count);
3812
3813 if (SvOK (count))
3814 semcnt = SvIV (count);
3815 }
3816
3817 RETVAL = sv_bless (
3818 coro_waitarray_new (aTHX_ semcnt),
3819 GvSTASH (CvGV (cv))
3820 );
3821}
3822 OUTPUT:
3823 RETVAL
3824
3825# helper for Coro::Channel and others
3826SV *
3827_alloc (int count)
3828 CODE:
3829 RETVAL = coro_waitarray_new (aTHX_ count);
3830 OUTPUT:
3831 RETVAL
3832
3833SV *
3834count (SV *self)
3835 CODE:
3836 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3837 OUTPUT:
3838 RETVAL
3839
3840void
3841up (SV *self, int adjust = 1)
3842 ALIAS:
3843 adjust = 1
3844 CODE:
3845 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3846
3847void
3848down (...)
3849 CODE:
3850 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3851
3852void
3853wait (...)
3854 CODE:
3855 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3856
3857void
3858try (SV *self)
3859 PPCODE:
3860{
3861 AV *av = (AV *)SvRV (self);
3862 SV *count_sv = AvARRAY (av)[0];
3863 IV count = SvIVX (count_sv);
3864
3865 if (count > 0)
3866 {
3867 --count;
3868 SvIVX (count_sv) = count;
3869 XSRETURN_YES;
3870 }
3871 else
3872 XSRETURN_NO;
3873}
3874
3875void
3876waiters (SV *self)
3877 PPCODE:
3878{
3879 AV *av = (AV *)SvRV (self);
3880 int wcount = AvFILLp (av) + 1 - 1;
3881
3882 if (GIMME_V == G_SCALAR)
3883 XPUSHs (sv_2mortal (newSViv (wcount)));
3884 else
3885 {
3886 int i;
3887 EXTEND (SP, wcount);
3888 for (i = 1; i <= wcount; ++i)
3889 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3890 }
3891}
3892
3893MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3894
3895void
3896_may_delete (SV *sem, int count, int extra_refs)
3897 PPCODE:
3898{
3899 AV *av = (AV *)SvRV (sem);
3900
3901 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3902 && AvFILLp (av) == 0 /* no waiters, just count */
3903 && SvIV (AvARRAY (av)[0]) == count)
3904 XSRETURN_YES;
3905
3906 XSRETURN_NO;
3907}
3908
3909MODULE = Coro::State PACKAGE = Coro::Signal
3910
3911SV *
3912new (SV *klass)
3913 CODE:
3914 RETVAL = sv_bless (
3915 coro_waitarray_new (aTHX_ 0),
3916 GvSTASH (CvGV (cv))
3917 );
3918 OUTPUT:
3919 RETVAL
3920
3921void
3922wait (...)
3923 CODE:
3924 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3925
3926void
3927broadcast (SV *self)
3928 CODE:
3929{
3930 AV *av = (AV *)SvRV (self);
3931 coro_signal_wake (aTHX_ av, AvFILLp (av));
3932}
3933
3934void
3935send (SV *self)
3936 CODE:
3937{
3938 AV *av = (AV *)SvRV (self);
3939
3940 if (AvFILLp (av))
3941 coro_signal_wake (aTHX_ av, 1);
3942 else
3943 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3944}
3945
3946IV
3947awaited (SV *self)
3948 CODE:
3949 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3950 OUTPUT:
3951 RETVAL
3952
3953
3954MODULE = Coro::State PACKAGE = Coro::AnyEvent
3955
3956BOOT:
3957 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3958
3959void
3960_schedule (...)
3961 CODE:
3962{
3963 static int incede;
3964
3965 api_cede_notself (aTHX);
3966
3967 ++incede;
3968 while (coro_nready >= incede && api_cede (aTHX))
3969 ;
3970
3971 sv_setsv (sv_activity, &PL_sv_undef);
3972 if (coro_nready >= incede)
3973 {
3974 PUSHMARK (SP);
3975 PUTBACK;
3976 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3977 }
3978
3979 --incede;
3980}
3981
3982
3983MODULE = Coro::State PACKAGE = Coro::AIO
3984
3985void
3986_register (char *target, char *proto, SV *req)
3987 CODE:
3988{
3989 SV *req_cv = s_get_cv_croak (req);
3990 /* newXSproto doesn't return the CV on 5.8 */
3991 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3992 sv_setpv ((SV *)slf_cv, proto);
3993 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3994}
3995
3996MODULE = Coro::State PACKAGE = Coro::Select
3997
3998void
3999patch_pp_sselect ()
4000 CODE:
4001 if (!coro_old_pp_sselect)
4002 {
4003 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4004 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4005 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4006 }
4007
4008void
4009unpatch_pp_sselect ()
4010 CODE:
4011 if (coro_old_pp_sselect)
4012 {
4013 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4014 coro_old_pp_sselect = 0;
4015 }
4016

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