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Comparing Coro/Coro/State.xs (file contents):
Revision 1.190 by root, Fri Oct 5 20:39:39 2007 UTC vs.
Revision 1.387 by root, Mon Feb 21 13:38:04 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#ifdef WIN32
27# undef setjmp
28# undef longjmp
29# undef _exit
30# define setjmp _setjmp /* deep magic */
31#else
32# include <inttypes.h> /* most portable stdint.h */
33#endif
14 34
15#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
16# include <unistd.h> 36# include <unistd.h>
17# include <sys/mman.h> 37# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 38# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 55# define BOOT_PAGESIZE (void)0
36#endif 56#endif
37 57
38#if CORO_USE_VALGRIND 58#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 59# 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 60#endif
44 61
45/* the maximum number of idle cctx that will be pooled */ 62/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 63static 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
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84 64
85#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
86# undef CORO_STACKGUARD 66# undef CORO_STACKGUARD
87#endif 67#endif
88 68
… …
95# define CORO_PREFER_PERL_FUNCTIONS 0 75# define CORO_PREFER_PERL_FUNCTIONS 0
96#endif 76#endif
97 77
98/* The next macros try to return the current stack pointer, in an as 78/* The next macros try to return the current stack pointer, in an as
99 * portable way as possible. */ 79 * portable way as possible. */
80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
82# define STACKLEVEL __builtin_frame_address (0)
83#else
100#define dSTACKLEVEL volatile char stacklevel 84# define dSTACKLEVEL volatile void *stacklevel
101#define STACKLEVEL ((void *)&stacklevel) 85# define STACKLEVEL ((void *)&stacklevel)
86#endif
102 87
103#define IN_DESTRUCT (PL_main_cv == Nullcv) 88#define IN_DESTRUCT PL_dirty
104 89
105#if __GNUC__ >= 3 90#if __GNUC__ >= 3
106# define attribute(x) __attribute__(x) 91# define attribute(x) __attribute__(x)
107# define BARRIER __asm__ __volatile__ ("" : : : "memory") 92# define expect(expr,value) __builtin_expect ((expr), (value))
93# define INLINE static inline
108#else 94#else
109# define attribute(x) 95# define attribute(x)
110# define BARRIER 96# define expect(expr,value) (expr)
97# define INLINE static
111#endif 98#endif
112 99
100#define expect_false(expr) expect ((expr) != 0, 0)
101#define expect_true(expr) expect ((expr) != 0, 1)
102
113#define NOINLINE attribute ((noinline)) 103#define NOINLINE attribute ((noinline))
114 104
115#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
116 107
117#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
118static perl_mutex coro_mutex; 109# if CORO_PTHREAD
119# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 110static void *coro_thx;
120# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 111# endif
121#else
122# define LOCK (void)0
123# define UNLOCK (void)0
124#endif 112#endif
125 113
126/* helper storage struct for Coro::AIO */ 114#ifdef __linux
127struct io_state 115# include <time.h> /* for timespec */
128{ 116# include <syscall.h> /* for SYS_* */
129 int errorno; 117# ifdef SYS_clock_gettime
130 I32 laststype; 118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
131 int laststatval; 119# define CORO_CLOCK_MONOTONIC 1
132 Stat_t statcache; 120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
133}; 121# endif
122#endif
134 123
124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
130
131static U32 cctx_gen;
135static size_t coro_stacksize = CORO_STACKSIZE; 132static size_t cctx_stacksize = CORO_STACKSIZE;
136static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
137static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
138static JMPENV *main_top_env; 135static JMPENV *main_top_env;
139static HV *coro_state_stash, *coro_stash; 136static HV *coro_state_stash, *coro_stash;
140static SV *coro_mortal; /* will be freed after next transfer */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
138
139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
141 142
142static GV *irsgv; /* $/ */ 143static GV *irsgv; /* $/ */
143static GV *stdoutgv; /* *STDOUT */ 144static GV *stdoutgv; /* *STDOUT */
145static SV *rv_diehook;
146static SV *rv_warnhook;
147static HV *hv_sig; /* %SIG */
144 148
145/* async_pool helper stuff */ 149/* async_pool helper stuff */
146static SV *sv_pool_rss; 150static SV *sv_pool_rss;
147static SV *sv_pool_size; 151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
148static AV *av_async_pool; 153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
156
157/* Coro::AnyEvent */
158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
149 165
150static struct coro_cctx *cctx_first; 166static struct coro_cctx *cctx_first;
151static int cctx_count, cctx_idle; 167static int cctx_count, cctx_idle;
152 168
153enum { 169enum {
… …
158 CC_TRACE_LINE = 0x10, /* trace each statement */ 174 CC_TRACE_LINE = 0x10, /* trace each statement */
159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
160}; 176};
161 177
162/* this is a structure representing a c-level coroutine */ 178/* this is a structure representing a c-level coroutine */
163typedef struct coro_cctx { 179typedef struct coro_cctx
180{
164 struct coro_cctx *next; 181 struct coro_cctx *next;
165 182
166 /* the stack */ 183 /* the stack */
167 void *sptr; 184 void *sptr;
168 size_t ssize; 185 size_t ssize;
… …
171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 188 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 189 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
173 JMPENV *top_env; 190 JMPENV *top_env;
174 coro_context cctx; 191 coro_context cctx;
175 192
193 U32 gen;
176#if CORO_USE_VALGRIND 194#if CORO_USE_VALGRIND
177 int valgrind_id; 195 int valgrind_id;
178#endif 196#endif
179 unsigned char flags; 197 unsigned char flags;
180} coro_cctx; 198} coro_cctx;
181 199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
182enum { 204enum {
183 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
184 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
185 CF_NEW = 0x0004, /* has never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
186 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
187}; 210};
188 211
189/* this is a structure representing a perl-level coroutine */ 212/* the structure where most of the perl state is stored, overlaid on the cxstack */
190struct coro { 213typedef struct
191 /* the c coroutine allocated to this perl coroutine, if any */ 214{
192 coro_cctx *cctx; 215 SV *defsv;
193 216 AV *defav;
194 /* data associated with this coroutine (initial args) */ 217 SV *errsv;
195 AV *args; 218 SV *irsgv;
196 int refcnt; 219 HV *hinthv;
197 int flags; /* CF_ flags */
198
199 /* optionally saved, might be zero */
200 AV *defav; /* @_ */
201 SV *defsv; /* $_ */
202 SV *errsv; /* $@ */
203 SV *deffh; /* default filehandle */
204 SV *irssv; /* $/ */
205 SV *irssv_sv; /* real $/ cache */
206
207#define VAR(name,type) type name; 220#define VAR(name,type) type name;
208# include "state.h" 221# include "state.h"
209#undef VAR 222#undef VAR
223} perl_slots;
224
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
226
227/* this is a structure representing a perl-level coroutine */
228struct coro {
229 /* the C coroutine allocated to this perl coroutine, if any */
230 coro_cctx *cctx;
231
232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
236 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */
239
240 CV *startcv; /* the CV to execute */
241 AV *args; /* data associated with this coroutine (initial args) */
242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
210 246
211 /* statistics */ 247 /* statistics */
212 int usecount; /* number of transfers to this coro */ 248 int usecount; /* number of transfers to this coro */
213 249
214 /* coro process data */ 250 /* coro process data */
215 int prio; 251 int prio;
216 //SV *throw; 252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
217 254
218 /* async_pool */ 255 /* async_pool */
219 SV *saved_deffh; 256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
220 269
221 /* linked list */ 270 /* linked list */
222 struct coro *next, *prev; 271 struct coro *next, *prev;
223 HV *hv; /* the perl hash associated with this coro, if any */
224}; 272};
225 273
226typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
227typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
228 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
229/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
230 283
231#define PRIO_MAX 3 284#define CORO_PRIO_MAX 3
232#define PRIO_HIGH 1 285#define CORO_PRIO_HIGH 1
233#define PRIO_NORMAL 0 286#define CORO_PRIO_NORMAL 0
234#define PRIO_LOW -1 287#define CORO_PRIO_LOW -1
235#define PRIO_IDLE -3 288#define CORO_PRIO_IDLE -3
236#define PRIO_MIN -4 289#define CORO_PRIO_MIN -4
237 290
238/* for Coro.pm */ 291/* for Coro.pm */
239static SV *coro_current; 292static SV *coro_current;
240static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static SV *coro_readyhook;
241static int coro_nready; 294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
242static struct coro *coro_first; 296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
307{
308 dSP;
309 PUSHMARK (SP - 4); /* fake argument list */
310 XPUSHs (coro_select_select);
311 PUTBACK;
312
313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
314 PL_op->op_flags |= OPf_STACKED;
315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
318
319/** time stuff **************************************************************/
320
321#ifdef HAS_GETTIMEOFDAY
322
323static void
324coro_u2time (pTHX_ UV ret[2])
325{
326 struct timeval tv;
327 gettimeofday (&tv, 0);
328
329 ret [0] = tv.tv_sec;
330 ret [1] = tv.tv_usec;
331}
332
333static double
334coro_nvtime ()
335{
336 struct timeval tv;
337 gettimeofday (&tv, 0);
338
339 return tv.tv_sec + tv.tv_usec * 1e-6;
340}
341
342static void
343time_init (void)
344{
345 nvtime = coro_nvtime;
346 u2time = coro_u2time;
347}
348
349#else
350
351static void
352time_init (void)
353{
354 SV **svp;
355
356 require_pv ("Time::HiRes");
357
358 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
359
360 if (!svp) croak ("Time::HiRes is required");
361 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
362
363 nvtime = INT2PTR (double (*)(), SvIV (*svp));
364
365 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
366 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
367}
368
369#endif
243 370
244/** lowlevel stuff **********************************************************/ 371/** lowlevel stuff **********************************************************/
245 372
373static SV *
374coro_get_sv (pTHX_ const char *name, int create)
375{
376#if PERL_VERSION_ATLEAST (5,10,0)
377 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
378 get_sv (name, create);
379#endif
380 return get_sv (name, create);
381}
382
246static AV * 383static AV *
384coro_get_av (pTHX_ const char *name, int create)
385{
386#if PERL_VERSION_ATLEAST (5,10,0)
387 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
388 get_av (name, create);
389#endif
390 return get_av (name, create);
391}
392
393static HV *
394coro_get_hv (pTHX_ const char *name, int create)
395{
396#if PERL_VERSION_ATLEAST (5,10,0)
397 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
398 get_hv (name, create);
399#endif
400 return get_hv (name, create);
401}
402
403INLINE void
404coro_times_update ()
405{
406#ifdef coro_clock_gettime
407 struct timespec ts;
408
409 ts.tv_sec = ts.tv_nsec = 0;
410 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
411 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
412
413 ts.tv_sec = ts.tv_nsec = 0;
414 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
415 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
416#else
417 dTHX;
418 UV tv[2];
419
420 u2time (aTHX_ tv);
421 time_real [0] = tv [0];
422 time_real [1] = tv [1] * 1000;
423#endif
424}
425
426INLINE void
427coro_times_add (struct coro *c)
428{
429 c->t_real [1] += time_real [1];
430 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
431 c->t_real [0] += time_real [0];
432
433 c->t_cpu [1] += time_cpu [1];
434 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
435 c->t_cpu [0] += time_cpu [0];
436}
437
438INLINE void
439coro_times_sub (struct coro *c)
440{
441 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
442 c->t_real [1] -= time_real [1];
443 c->t_real [0] -= time_real [0];
444
445 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
446 c->t_cpu [1] -= time_cpu [1];
447 c->t_cpu [0] -= time_cpu [0];
448}
449
450/*****************************************************************************/
451/* magic glue */
452
453#define CORO_MAGIC_type_cv 26
454#define CORO_MAGIC_type_state PERL_MAGIC_ext
455
456#define CORO_MAGIC_NN(sv, type) \
457 (expect_true (SvMAGIC (sv)->mg_type == type) \
458 ? SvMAGIC (sv) \
459 : mg_find (sv, type))
460
461#define CORO_MAGIC(sv, type) \
462 (expect_true (SvMAGIC (sv)) \
463 ? CORO_MAGIC_NN (sv, type) \
464 : 0)
465
466#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
467#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
468
469INLINE struct coro *
470SvSTATE_ (pTHX_ SV *coro)
471{
472 HV *stash;
473 MAGIC *mg;
474
475 if (SvROK (coro))
476 coro = SvRV (coro);
477
478 if (expect_false (SvTYPE (coro) != SVt_PVHV))
479 croak ("Coro::State object required");
480
481 stash = SvSTASH (coro);
482 if (expect_false (stash != coro_stash && stash != coro_state_stash))
483 {
484 /* very slow, but rare, check */
485 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
486 croak ("Coro::State object required");
487 }
488
489 mg = CORO_MAGIC_state (coro);
490 return (struct coro *)mg->mg_ptr;
491}
492
493#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
494
495/* faster than SvSTATE, but expects a coroutine hv */
496#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
497#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
498
499/*****************************************************************************/
500/* padlist management and caching */
501
502static AV *
247coro_clone_padlist (pTHX_ CV *cv) 503coro_derive_padlist (pTHX_ CV *cv)
248{ 504{
249 AV *padlist = CvPADLIST (cv); 505 AV *padlist = CvPADLIST (cv);
250 AV *newpadlist, *newpad; 506 AV *newpadlist, *newpad;
251 507
252 newpadlist = newAV (); 508 newpadlist = newAV ();
253 AvREAL_off (newpadlist); 509 AvREAL_off (newpadlist);
254#if PERL_VERSION_ATLEAST (5,9,0) 510#if PERL_VERSION_ATLEAST (5,10,0)
255 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 511 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
256#else 512#else
257 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
258#endif 514#endif
259 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 515 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
260 --AvFILLp (padlist); 516 --AvFILLp (padlist);
261 517
262 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 518 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
263 av_store (newpadlist, 1, (SV *)newpad); 519 av_store (newpadlist, 1, (SV *)newpad);
264 520
265 return newpadlist; 521 return newpadlist;
266} 522}
267 523
268static void 524static void
269free_padlist (pTHX_ AV *padlist) 525free_padlist (pTHX_ AV *padlist)
270{ 526{
271 /* may be during global destruction */ 527 /* may be during global destruction */
272 if (SvREFCNT (padlist)) 528 if (!IN_DESTRUCT)
273 { 529 {
274 I32 i = AvFILLp (padlist); 530 I32 i = AvFILLp (padlist);
275 while (i >= 0) 531
532 while (i > 0) /* special-case index 0 */
276 { 533 {
277 SV **svp = av_fetch (padlist, i--, FALSE); 534 /* we try to be extra-careful here */
278 if (svp) 535 AV *av = (AV *)AvARRAY (padlist)[i--];
279 { 536 I32 j = AvFILLp (av);
280 SV *sv; 537
281 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 538 while (j >= 0)
539 SvREFCNT_dec (AvARRAY (av)[j--]);
540
541 AvFILLp (av) = -1;
282 SvREFCNT_dec (sv); 542 SvREFCNT_dec (av);
283
284 SvREFCNT_dec (*svp);
285 }
286 } 543 }
287 544
545 SvREFCNT_dec (AvARRAY (padlist)[0]);
546
547 AvFILLp (padlist) = -1;
288 SvREFCNT_dec ((SV*)padlist); 548 SvREFCNT_dec ((SV*)padlist);
289 } 549 }
290} 550}
291 551
292static int 552static int
293coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 553coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
294{ 554{
295 AV *padlist; 555 AV *padlist;
296 AV *av = (AV *)mg->mg_obj; 556 AV *av = (AV *)mg->mg_obj;
557
558 /* perl manages to free our internal AV and _then_ call us */
559 if (IN_DESTRUCT)
560 return 0;
297 561
298 /* casting is fun. */ 562 /* casting is fun. */
299 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 563 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
300 free_padlist (aTHX_ padlist); 564 free_padlist (aTHX_ padlist);
301 565
302 SvREFCNT_dec (av); 566 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
303 567
304 return 0; 568 return 0;
305} 569}
306 570
307#define PERL_MAGIC_coro PERL_MAGIC_ext 571static MGVTBL coro_cv_vtbl = {
308 572 0, 0, 0, 0,
309static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 573 coro_cv_free
310 574};
311#define CORO_MAGIC(cv) \
312 SvMAGIC (cv) \
313 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
314 ? SvMAGIC (cv) \
315 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
316 : 0
317
318static struct coro *
319SvSTATE_ (pTHX_ SV *coro)
320{
321 HV *stash;
322 MAGIC *mg;
323
324 if (SvROK (coro))
325 coro = SvRV (coro);
326
327 if (SvTYPE (coro) != SVt_PVHV)
328 croak ("Coro::State object required");
329
330 stash = SvSTASH (coro);
331 if (stash != coro_stash && stash != coro_state_stash)
332 {
333 /* very slow, but rare, check */
334 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
335 croak ("Coro::State object required");
336 }
337
338 mg = CORO_MAGIC (coro);
339 return (struct coro *)mg->mg_ptr;
340}
341
342#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
343 575
344/* the next two functions merely cache the padlists */ 576/* the next two functions merely cache the padlists */
345static void 577static void
346get_padlist (pTHX_ CV *cv) 578get_padlist (pTHX_ CV *cv)
347{ 579{
348 MAGIC *mg = CORO_MAGIC (cv); 580 MAGIC *mg = CORO_MAGIC_cv (cv);
349 AV *av; 581 AV *av;
350 582
351 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 583 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
352 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 584 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
353 else 585 else
354 { 586 {
355#if CORO_PREFER_PERL_FUNCTIONS 587#if CORO_PREFER_PERL_FUNCTIONS
356 /* this is probably cleaner, but also slower? */ 588 /* this is probably cleaner? but also slower! */
589 /* in practise, it seems to be less stable */
357 CV *cp = Perl_cv_clone (cv); 590 CV *cp = Perl_cv_clone (aTHX_ cv);
358 CvPADLIST (cv) = CvPADLIST (cp); 591 CvPADLIST (cv) = CvPADLIST (cp);
359 CvPADLIST (cp) = 0; 592 CvPADLIST (cp) = 0;
360 SvREFCNT_dec (cp); 593 SvREFCNT_dec (cp);
361#else 594#else
362 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 595 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
363#endif 596#endif
364 } 597 }
365} 598}
366 599
367static void 600static void
368put_padlist (pTHX_ CV *cv) 601put_padlist (pTHX_ CV *cv)
369{ 602{
370 MAGIC *mg = CORO_MAGIC (cv); 603 MAGIC *mg = CORO_MAGIC_cv (cv);
371 AV *av; 604 AV *av;
372 605
373 if (!mg) 606 if (expect_false (!mg))
374 { 607 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
375 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
376 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
377 mg->mg_virtual = &vtbl_coro;
378 mg->mg_obj = (SV *)newAV ();
379 }
380 608
381 av = (AV *)mg->mg_obj; 609 av = (AV *)mg->mg_obj;
382 610
383 if (AvFILLp (av) >= AvMAX (av)) 611 if (expect_false (AvFILLp (av) >= AvMAX (av)))
384 av_extend (av, AvMAX (av) + 1); 612 av_extend (av, AvFILLp (av) + 1);
385 613
386 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 614 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
387} 615}
388 616
389/** load & save, init *******************************************************/ 617/** load & save, init *******************************************************/
390 618
619/* swap sv heads, at least logically */
620static void
621swap_svs (pTHX_ Coro__State c)
622{
623 int i;
624
625 for (i = 0; i <= AvFILLp (c->swap_sv); )
626 {
627 SV *a = AvARRAY (c->swap_sv)[i++];
628 SV *b = AvARRAY (c->swap_sv)[i++];
629
630 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
631 SV tmp;
632
633 /* swap sv_any */
634 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
635
636 /* swap sv_flags */
637 SvFLAGS (&tmp) = SvFLAGS (a);
638 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
639 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
640
641#if PERL_VERSION_ATLEAST (5,10,0)
642 /* perl 5.10 complicates this _quite_ a bit, but it also is
643 * much faster, so no quarrels here. alternatively, we could
644 * sv_upgrade to avoid this.
645 */
646 {
647 /* swap sv_u */
648 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
649
650 /* if SvANY points to the head, we need to adjust the pointers,
651 * as the pointer for a still points to b, and maybe vice versa.
652 */
653 #define svany_in_head(type) \
654 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
655
656 if (svany_in_head (SvTYPE (a)))
657 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
658
659 if (svany_in_head (SvTYPE (b)))
660 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
661 }
662#endif
663 }
664}
665
666#define SWAP_SVS(coro) \
667 if (expect_false ((coro)->swap_sv)) \
668 swap_svs (aTHX_ (coro))
669
670static void
671on_enterleave_call (pTHX_ SV *cb);
672
391static void 673static void
392load_perl (pTHX_ Coro__State c) 674load_perl (pTHX_ Coro__State c)
393{ 675{
676 perl_slots *slot = c->slot;
677 c->slot = 0;
678
679 PL_mainstack = c->mainstack;
680
681 GvSV (PL_defgv) = slot->defsv;
682 GvAV (PL_defgv) = slot->defav;
683 GvSV (PL_errgv) = slot->errsv;
684 GvSV (irsgv) = slot->irsgv;
685 GvHV (PL_hintgv) = slot->hinthv;
686
394#define VAR(name,type) PL_ ## name = c->name; 687 #define VAR(name,type) PL_ ## name = slot->name;
395# include "state.h" 688 # include "state.h"
396#undef VAR 689 #undef VAR
397
398 GvSV (PL_defgv) = c->defsv;
399 GvAV (PL_defgv) = c->defav;
400 GvSV (PL_errgv) = c->errsv;
401 GvSV (irsgv) = c->irssv_sv;
402 690
403 { 691 {
404 dSP; 692 dSP;
693
405 CV *cv; 694 CV *cv;
406 695
407 /* now do the ugly restore mess */ 696 /* now do the ugly restore mess */
408 while ((cv = (CV *)POPs)) 697 while (expect_true (cv = (CV *)POPs))
409 { 698 {
410 put_padlist (aTHX_ cv); /* mark this padlist as available */ 699 put_padlist (aTHX_ cv); /* mark this padlist as available */
411 CvDEPTH (cv) = PTR2IV (POPs); 700 CvDEPTH (cv) = PTR2IV (POPs);
412 CvPADLIST (cv) = (AV *)POPs; 701 CvPADLIST (cv) = (AV *)POPs;
413 } 702 }
414 703
415 PUTBACK; 704 PUTBACK;
416 } 705 }
706
707 slf_frame = c->slf_frame;
708 CORO_THROW = c->except;
709
710 if (expect_false (enable_times))
711 {
712 if (expect_false (!times_valid))
713 coro_times_update ();
714
715 coro_times_sub (c);
716 }
717
718 if (expect_false (c->on_enter))
719 {
720 int i;
721
722 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
723 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
724 }
725
726 SWAP_SVS (c);
417} 727}
418 728
419static void 729static void
420save_perl (pTHX_ Coro__State c) 730save_perl (pTHX_ Coro__State c)
421{ 731{
732 SWAP_SVS (c);
733
734 if (expect_false (c->on_leave))
735 {
736 int i;
737
738 for (i = AvFILLp (c->on_leave); i >= 0; --i)
739 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
740 }
741
742 times_valid = 0;
743
744 if (expect_false (enable_times))
745 {
746 coro_times_update (); times_valid = 1;
747 coro_times_add (c);
748 }
749
750 c->except = CORO_THROW;
751 c->slf_frame = slf_frame;
752
422 { 753 {
423 dSP; 754 dSP;
424 I32 cxix = cxstack_ix; 755 I32 cxix = cxstack_ix;
425 PERL_CONTEXT *ccstk = cxstack; 756 PERL_CONTEXT *ccstk = cxstack;
426 PERL_SI *top_si = PL_curstackinfo; 757 PERL_SI *top_si = PL_curstackinfo;
… …
432 763
433 XPUSHs (Nullsv); 764 XPUSHs (Nullsv);
434 /* this loop was inspired by pp_caller */ 765 /* this loop was inspired by pp_caller */
435 for (;;) 766 for (;;)
436 { 767 {
437 while (cxix >= 0) 768 while (expect_true (cxix >= 0))
438 { 769 {
439 PERL_CONTEXT *cx = &ccstk[cxix--]; 770 PERL_CONTEXT *cx = &ccstk[cxix--];
440 771
441 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 772 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
442 { 773 {
443 CV *cv = cx->blk_sub.cv; 774 CV *cv = cx->blk_sub.cv;
444 775
445 if (CvDEPTH (cv)) 776 if (expect_true (CvDEPTH (cv)))
446 { 777 {
447 EXTEND (SP, 3); 778 EXTEND (SP, 3);
448 PUSHs ((SV *)CvPADLIST (cv)); 779 PUSHs ((SV *)CvPADLIST (cv));
449 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 780 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
450 PUSHs ((SV *)cv); 781 PUSHs ((SV *)cv);
451 782
452 CvDEPTH (cv) = 0; 783 CvDEPTH (cv) = 0;
453 get_padlist (aTHX_ cv); 784 get_padlist (aTHX_ cv);
454 } 785 }
455 } 786 }
456 } 787 }
457 788
458 if (top_si->si_type == PERLSI_MAIN) 789 if (expect_true (top_si->si_type == PERLSI_MAIN))
459 break; 790 break;
460 791
461 top_si = top_si->si_prev; 792 top_si = top_si->si_prev;
462 ccstk = top_si->si_cxstack; 793 ccstk = top_si->si_cxstack;
463 cxix = top_si->si_cxix; 794 cxix = top_si->si_cxix;
464 } 795 }
465 796
466 PUTBACK; 797 PUTBACK;
467 } 798 }
468 799
800 /* allocate some space on the context stack for our purposes */
801 /* we manually unroll here, as usually 2 slots is enough */
802 if (SLOT_COUNT >= 1) CXINC;
803 if (SLOT_COUNT >= 2) CXINC;
804 if (SLOT_COUNT >= 3) CXINC;
805 {
806 unsigned int i;
807 for (i = 3; i < SLOT_COUNT; ++i)
808 CXINC;
809 }
810 cxstack_ix -= SLOT_COUNT; /* undo allocation */
811
812 c->mainstack = PL_mainstack;
813
814 {
815 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
816
469 c->defav = GvAV (PL_defgv); 817 slot->defav = GvAV (PL_defgv);
470 c->defsv = DEFSV; 818 slot->defsv = DEFSV;
471 c->errsv = ERRSV; 819 slot->errsv = ERRSV;
472 c->irssv_sv = GvSV (irsgv); 820 slot->irsgv = GvSV (irsgv);
821 slot->hinthv = GvHV (PL_hintgv);
473 822
474#define VAR(name,type)c->name = PL_ ## name; 823 #define VAR(name,type) slot->name = PL_ ## name;
475# include "state.h" 824 # include "state.h"
476#undef VAR 825 #undef VAR
826 }
477} 827}
478 828
479/* 829/*
480 * allocate various perl stacks. This is an exact copy 830 * allocate various perl stacks. This is almost an exact copy
481 * of perl.c:init_stacks, except that it uses less memory 831 * of perl.c:init_stacks, except that it uses less memory
482 * on the (sometimes correct) assumption that coroutines do 832 * on the (sometimes correct) assumption that coroutines do
483 * not usually need a lot of stackspace. 833 * not usually need a lot of stackspace.
484 */ 834 */
485#if CORO_PREFER_PERL_FUNCTIONS 835#if CORO_PREFER_PERL_FUNCTIONS
486# define coro_init_stacks init_stacks 836# define coro_init_stacks(thx) init_stacks ()
487#else 837#else
488static void 838static void
489coro_init_stacks (pTHX) 839coro_init_stacks (pTHX)
490{ 840{
491 PL_curstackinfo = new_stackinfo(64, 6); 841 PL_curstackinfo = new_stackinfo(32, 8);
492 PL_curstackinfo->si_type = PERLSI_MAIN; 842 PL_curstackinfo->si_type = PERLSI_MAIN;
493 PL_curstack = PL_curstackinfo->si_stack; 843 PL_curstack = PL_curstackinfo->si_stack;
494 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 844 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
495 845
496 PL_stack_base = AvARRAY(PL_curstack); 846 PL_stack_base = AvARRAY(PL_curstack);
497 PL_stack_sp = PL_stack_base; 847 PL_stack_sp = PL_stack_base;
498 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 848 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
499 849
500 New(50,PL_tmps_stack,64,SV*); 850 New(50,PL_tmps_stack,32,SV*);
501 PL_tmps_floor = -1; 851 PL_tmps_floor = -1;
502 PL_tmps_ix = -1; 852 PL_tmps_ix = -1;
503 PL_tmps_max = 64; 853 PL_tmps_max = 32;
504 854
505 New(54,PL_markstack,16,I32); 855 New(54,PL_markstack,16,I32);
506 PL_markstack_ptr = PL_markstack; 856 PL_markstack_ptr = PL_markstack;
507 PL_markstack_max = PL_markstack + 16; 857 PL_markstack_max = PL_markstack + 16;
508 858
509#ifdef SET_MARK_OFFSET 859#ifdef SET_MARK_OFFSET
510 SET_MARK_OFFSET; 860 SET_MARK_OFFSET;
511#endif 861#endif
512 862
513 New(54,PL_scopestack,16,I32); 863 New(54,PL_scopestack,8,I32);
514 PL_scopestack_ix = 0; 864 PL_scopestack_ix = 0;
515 PL_scopestack_max = 16; 865 PL_scopestack_max = 8;
516 866
517 New(54,PL_savestack,64,ANY); 867 New(54,PL_savestack,24,ANY);
518 PL_savestack_ix = 0; 868 PL_savestack_ix = 0;
519 PL_savestack_max = 64; 869 PL_savestack_max = 24;
520 870
521#if !PERL_VERSION_ATLEAST (5,9,0) 871#if !PERL_VERSION_ATLEAST (5,10,0)
522 New(54,PL_retstack,4,OP*); 872 New(54,PL_retstack,4,OP*);
523 PL_retstack_ix = 0; 873 PL_retstack_ix = 0;
524 PL_retstack_max = 4; 874 PL_retstack_max = 4;
525#endif 875#endif
526} 876}
… …
528 878
529/* 879/*
530 * destroy the stacks, the callchain etc... 880 * destroy the stacks, the callchain etc...
531 */ 881 */
532static void 882static void
533coro_destroy_stacks (pTHX) 883coro_destruct_stacks (pTHX)
534{ 884{
535 while (PL_curstackinfo->si_next) 885 while (PL_curstackinfo->si_next)
536 PL_curstackinfo = PL_curstackinfo->si_next; 886 PL_curstackinfo = PL_curstackinfo->si_next;
537 887
538 while (PL_curstackinfo) 888 while (PL_curstackinfo)
… …
549 899
550 Safefree (PL_tmps_stack); 900 Safefree (PL_tmps_stack);
551 Safefree (PL_markstack); 901 Safefree (PL_markstack);
552 Safefree (PL_scopestack); 902 Safefree (PL_scopestack);
553 Safefree (PL_savestack); 903 Safefree (PL_savestack);
554#if !PERL_VERSION_ATLEAST (5,9,0) 904#if !PERL_VERSION_ATLEAST (5,10,0)
555 Safefree (PL_retstack); 905 Safefree (PL_retstack);
556#endif 906#endif
557} 907}
558 908
909#define CORO_RSS \
910 rss += sizeof (SYM (curstackinfo)); \
911 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
912 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
913 rss += SYM (tmps_max) * sizeof (SV *); \
914 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
915 rss += SYM (scopestack_max) * sizeof (I32); \
916 rss += SYM (savestack_max) * sizeof (ANY);
917
559static size_t 918static size_t
560coro_rss (pTHX_ struct coro *coro) 919coro_rss (pTHX_ struct coro *coro)
561{ 920{
562 size_t rss = sizeof (*coro); 921 size_t rss = sizeof (*coro);
563 922
564 if (coro->mainstack) 923 if (coro->mainstack)
565 { 924 {
566 if (coro->flags & CF_RUNNING) 925 if (coro->flags & CF_RUNNING)
567 { 926 {
568 #define VAR(name,type)coro->name = PL_ ## name; 927 #define SYM(sym) PL_ ## sym
569 # include "state.h" 928 CORO_RSS;
570 #undef VAR 929 #undef SYM
571 } 930 }
931 else
932 {
933 #define SYM(sym) coro->slot->sym
934 CORO_RSS;
935 #undef SYM
936 }
937 }
572 938
573 rss += sizeof (coro->curstackinfo); 939 return rss;
574 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 940}
575 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
576 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
577 rss += coro->tmps_max * sizeof (SV *);
578 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
579 rss += coro->scopestack_max * sizeof (I32);
580 rss += coro->savestack_max * sizeof (ANY);
581 941
582#if !PERL_VERSION_ATLEAST (5,9,0) 942/** coroutine stack handling ************************************************/
583 rss += coro->retstack_max * sizeof (OP *); 943
944static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
945static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
947
948/* apparently < 5.8.8 */
949#ifndef MgPV_nolen_const
950#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
951 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
952 (const char*)(mg)->mg_ptr)
584#endif 953#endif
954
955/*
956 * This overrides the default magic get method of %SIG elements.
957 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
958 * and instead of trying to save and restore the hash elements, we just provide
959 * readback here.
960 */
961static int
962coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
963{
964 const char *s = MgPV_nolen_const (mg);
965
966 if (*s == '_')
585 } 967 {
968 SV **svp = 0;
586 969
970 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
971 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
972
973 if (svp)
974 {
975 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
976 return 0;
977 }
978 }
979
980 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
981}
982
983static int
984coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
985{
986 const char *s = MgPV_nolen_const (mg);
987
988 if (*s == '_')
989 {
990 SV **svp = 0;
991
992 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
993 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
994
995 if (svp)
996 {
997 SV *old = *svp;
998 *svp = 0;
999 SvREFCNT_dec (old);
1000 return 0;
1001 }
1002 }
1003
1004 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1005}
1006
1007static int
1008coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1009{
1010 const char *s = MgPV_nolen_const (mg);
1011
1012 if (*s == '_')
1013 {
1014 SV **svp = 0;
1015
1016 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1017 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1018
1019 if (svp)
1020 {
1021 SV *old = *svp;
1022 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1023 SvREFCNT_dec (old);
1024 return 0;
1025 }
1026 }
1027
1028 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1029}
1030
1031static void
1032prepare_nop (pTHX_ struct coro_transfer_args *ta)
1033{
1034 /* kind of mega-hacky, but works */
1035 ta->next = ta->prev = (struct coro *)ta;
1036}
1037
1038static int
1039slf_check_nop (pTHX_ struct CoroSLF *frame)
1040{
587 return rss; 1041 return 0;
588} 1042}
589 1043
590/** coroutine stack handling ************************************************/
591
592static void 1044static int
1045slf_check_repeat (pTHX_ struct CoroSLF *frame)
1046{
1047 return 1;
1048}
1049
1050static UNOP init_perl_op;
1051
1052static void NOINLINE /* noinline to keep it out of the transfer fast path */
593coro_setup (pTHX_ struct coro *coro) 1053init_perl (pTHX_ struct coro *coro)
594{ 1054{
595 /* 1055 /*
596 * emulate part of the perl startup here. 1056 * emulate part of the perl startup here.
597 */ 1057 */
598 coro_init_stacks (aTHX); 1058 coro_init_stacks (aTHX);
599 1059
600 PL_runops = RUNOPS_DEFAULT; 1060 PL_runops = RUNOPS_DEFAULT;
601 PL_curcop = &PL_compiling; 1061 PL_curcop = &PL_compiling;
602 PL_in_eval = EVAL_NULL; 1062 PL_in_eval = EVAL_NULL;
603 PL_comppad = 0; 1063 PL_comppad = 0;
1064 PL_comppad_name = 0;
1065 PL_comppad_name_fill = 0;
1066 PL_comppad_name_floor = 0;
604 PL_curpm = 0; 1067 PL_curpm = 0;
1068 PL_curpad = 0;
605 PL_localizing = 0; 1069 PL_localizing = 0;
606 PL_dirty = 0;
607 PL_restartop = 0; 1070 PL_restartop = 0;
1071#if PERL_VERSION_ATLEAST (5,10,0)
1072 PL_parser = 0;
1073#endif
1074 PL_hints = 0;
1075
1076 /* recreate the die/warn hooks */
1077 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1078 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
608 1079
609 GvSV (PL_defgv) = NEWSV (0, 0); 1080 GvSV (PL_defgv) = newSV (0);
610 GvAV (PL_defgv) = coro->args; coro->args = 0; 1081 GvAV (PL_defgv) = coro->args; coro->args = 0;
611 GvSV (PL_errgv) = NEWSV (0, 0); 1082 GvSV (PL_errgv) = newSV (0);
612 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1083 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1084 GvHV (PL_hintgv) = 0;
613 PL_rs = newSVsv (GvSV (irsgv)); 1085 PL_rs = newSVsv (GvSV (irsgv));
614 PL_defoutgv = SvREFCNT_inc (stdoutgv); 1086 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
615 1087
616 { 1088 {
617 dSP; 1089 dSP;
618 LOGOP myop; 1090 UNOP myop;
619 1091
620 Zero (&myop, 1, LOGOP); 1092 Zero (&myop, 1, UNOP);
621 myop.op_next = Nullop; 1093 myop.op_next = Nullop;
1094 myop.op_type = OP_ENTERSUB;
622 myop.op_flags = OPf_WANT_VOID; 1095 myop.op_flags = OPf_WANT_VOID;
623 1096
624 PUSHMARK (SP); 1097 PUSHMARK (SP);
625 XPUSHs (av_shift (GvAV (PL_defgv))); 1098 PUSHs ((SV *)coro->startcv);
626 PUTBACK; 1099 PUTBACK;
627 PL_op = (OP *)&myop; 1100 PL_op = (OP *)&myop;
628 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1101 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
629 SPAGAIN;
630 } 1102 }
631 1103
632 ENTER; /* necessary e.g. for dounwind */ 1104 /* this newly created coroutine might be run on an existing cctx which most
633} 1105 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1106 */
1107 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1108 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
634 1109
1110 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1111 init_perl_op.op_next = PL_op;
1112 init_perl_op.op_type = OP_ENTERSUB;
1113 init_perl_op.op_ppaddr = pp_slf;
1114 /* no flags etc. required, as an init function won't be called */
1115
1116 PL_op = (OP *)&init_perl_op;
1117
1118 /* copy throw, in case it was set before init_perl */
1119 CORO_THROW = coro->except;
1120
1121 SWAP_SVS (coro);
1122
1123 if (expect_false (enable_times))
1124 {
1125 coro_times_update ();
1126 coro_times_sub (coro);
1127 }
1128}
1129
635static void 1130static void
636coro_destroy (pTHX_ struct coro *coro) 1131coro_unwind_stacks (pTHX)
637{ 1132{
638 if (!IN_DESTRUCT) 1133 if (!IN_DESTRUCT)
639 { 1134 {
640 /* restore all saved variables and stuff */ 1135 /* restore all saved variables and stuff */
641 LEAVE_SCOPE (0); 1136 LEAVE_SCOPE (0);
… …
649 POPSTACK_TO (PL_mainstack); 1144 POPSTACK_TO (PL_mainstack);
650 1145
651 /* unwind main stack */ 1146 /* unwind main stack */
652 dounwind (-1); 1147 dounwind (-1);
653 } 1148 }
1149}
654 1150
655 SvREFCNT_dec (GvSV (PL_defgv)); 1151static void
656 SvREFCNT_dec (GvAV (PL_defgv)); 1152destroy_perl (pTHX_ struct coro *coro)
657 SvREFCNT_dec (GvSV (PL_errgv)); 1153{
658 SvREFCNT_dec (PL_defoutgv); 1154 SV *svf [9];
659 SvREFCNT_dec (PL_rs);
660 SvREFCNT_dec (GvSV (irsgv));
661 1155
1156 {
1157 struct coro *current = SvSTATE_current;
1158
1159 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1160
1161 save_perl (aTHX_ current);
1162 load_perl (aTHX_ coro);
1163
1164 coro_unwind_stacks (aTHX);
1165 coro_destruct_stacks (aTHX);
1166
1167 /* restore swapped sv's */
1168 SWAP_SVS (coro);
1169
1170 // now save some sv's to be free'd later
1171 svf [0] = GvSV (PL_defgv);
1172 svf [1] = (SV *)GvAV (PL_defgv);
1173 svf [2] = GvSV (PL_errgv);
1174 svf [3] = (SV *)PL_defoutgv;
1175 svf [4] = PL_rs;
1176 svf [5] = GvSV (irsgv);
1177 svf [6] = (SV *)GvHV (PL_hintgv);
1178 svf [7] = PL_diehook;
1179 svf [8] = PL_warnhook;
1180 assert (9 == sizeof (svf) / sizeof (*svf));
1181
1182 load_perl (aTHX_ current);
1183 }
1184
1185 {
1186 unsigned int i;
1187
1188 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1189 SvREFCNT_dec (svf [i]);
1190
662 SvREFCNT_dec (coro->saved_deffh); 1191 SvREFCNT_dec (coro->saved_deffh);
663 //SvREFCNT_dec (coro->throw); 1192 SvREFCNT_dec (coro->rouse_cb);
664 1193 SvREFCNT_dec (coro->invoke_cb);
665 coro_destroy_stacks (aTHX); 1194 SvREFCNT_dec (coro->invoke_av);
1195 }
666} 1196}
667 1197
668static void 1198INLINE void
669free_coro_mortal (pTHX) 1199free_coro_mortal (pTHX)
670{ 1200{
671 if (coro_mortal) 1201 if (expect_true (coro_mortal))
672 { 1202 {
673 SvREFCNT_dec (coro_mortal); 1203 SvREFCNT_dec (coro_mortal);
674 coro_mortal = 0; 1204 coro_mortal = 0;
675 } 1205 }
676} 1206}
… …
678static int 1208static int
679runops_trace (pTHX) 1209runops_trace (pTHX)
680{ 1210{
681 COP *oldcop = 0; 1211 COP *oldcop = 0;
682 int oldcxix = -2; 1212 int oldcxix = -2;
683 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
684 coro_cctx *cctx = coro->cctx;
685 1213
686 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1214 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
687 { 1215 {
688 PERL_ASYNC_CHECK (); 1216 PERL_ASYNC_CHECK ();
689 1217
690 if (cctx->flags & CC_TRACE_ALL) 1218 if (cctx_current->flags & CC_TRACE_ALL)
691 { 1219 {
692 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1220 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
693 { 1221 {
694 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1222 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
695 SV **bot, **top; 1223 SV **bot, **top;
696 AV *av = newAV (); /* return values */ 1224 AV *av = newAV (); /* return values */
697 SV **cb; 1225 SV **cb;
… …
705 bot = PL_stack_base + cx->blk_oldsp + 1; 1233 bot = PL_stack_base + cx->blk_oldsp + 1;
706 top = cx->blk_gimme == G_ARRAY ? SP + 1 1234 top = cx->blk_gimme == G_ARRAY ? SP + 1
707 : cx->blk_gimme == G_SCALAR ? bot + 1 1235 : cx->blk_gimme == G_SCALAR ? bot + 1
708 : bot; 1236 : bot;
709 1237
1238 av_extend (av, top - bot);
710 while (bot < top) 1239 while (bot < top)
711 av_push (av, SvREFCNT_inc (*bot++)); 1240 av_push (av, SvREFCNT_inc_NN (*bot++));
712 1241
713 PL_runops = RUNOPS_DEFAULT; 1242 PL_runops = RUNOPS_DEFAULT;
714 ENTER; 1243 ENTER;
715 SAVETMPS; 1244 SAVETMPS;
716 EXTEND (SP, 3); 1245 EXTEND (SP, 3);
… …
733 1262
734 if (PL_curcop != &PL_compiling) 1263 if (PL_curcop != &PL_compiling)
735 { 1264 {
736 SV **cb; 1265 SV **cb;
737 1266
738 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1267 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
739 { 1268 {
740 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1269 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
741 1270
742 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1271 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
743 { 1272 {
744 runops_proc_t old_runops = PL_runops;
745 dSP; 1273 dSP;
746 GV *gv = CvGV (cx->blk_sub.cv); 1274 GV *gv = CvGV (cx->blk_sub.cv);
747 SV *fullname = sv_2mortal (newSV (0)); 1275 SV *fullname = sv_2mortal (newSV (0));
748 1276
749 if (isGV (gv)) 1277 if (isGV (gv))
… …
754 SAVETMPS; 1282 SAVETMPS;
755 EXTEND (SP, 3); 1283 EXTEND (SP, 3);
756 PUSHMARK (SP); 1284 PUSHMARK (SP);
757 PUSHs (&PL_sv_yes); 1285 PUSHs (&PL_sv_yes);
758 PUSHs (fullname); 1286 PUSHs (fullname);
759 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1287 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
760 PUTBACK; 1288 PUTBACK;
761 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1289 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
762 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1290 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
763 SPAGAIN; 1291 SPAGAIN;
764 FREETMPS; 1292 FREETMPS;
… …
767 } 1295 }
768 1296
769 oldcxix = cxstack_ix; 1297 oldcxix = cxstack_ix;
770 } 1298 }
771 1299
772 if (cctx->flags & CC_TRACE_LINE) 1300 if (cctx_current->flags & CC_TRACE_LINE)
773 { 1301 {
774 dSP; 1302 dSP;
775 1303
776 PL_runops = RUNOPS_DEFAULT; 1304 PL_runops = RUNOPS_DEFAULT;
777 ENTER; 1305 ENTER;
… …
796 1324
797 TAINT_NOT; 1325 TAINT_NOT;
798 return 0; 1326 return 0;
799} 1327}
800 1328
801/* inject a fake call to Coro::State::_cctx_init into the execution */ 1329static struct CoroSLF cctx_ssl_frame;
802/* _cctx_init should be careful, as it could be called at almost any time */ 1330
803/* during execution of a perl program */ 1331static void
1332slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1333{
1334 ta->prev = 0;
1335}
1336
1337static int
1338slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1339{
1340 *frame = cctx_ssl_frame;
1341
1342 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1343}
1344
1345/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
804static void NOINLINE 1346static void NOINLINE
805prepare_cctx (pTHX_ coro_cctx *cctx) 1347cctx_prepare (pTHX)
806{ 1348{
807 dSP;
808 LOGOP myop;
809
810 PL_top_env = &PL_start_env; 1349 PL_top_env = &PL_start_env;
811 1350
812 if (cctx->flags & CC_TRACE) 1351 if (cctx_current->flags & CC_TRACE)
813 PL_runops = runops_trace; 1352 PL_runops = runops_trace;
814 1353
815 Zero (&myop, 1, LOGOP); 1354 /* we already must be executing an SLF op, there is no other valid way
816 myop.op_next = PL_op; 1355 * that can lead to creation of a new cctx */
817 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1356 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1357 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
818 1358
819 PUSHMARK (SP); 1359 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
820 EXTEND (SP, 2); 1360 cctx_ssl_frame = slf_frame;
821 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1361
822 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1362 slf_frame.prepare = slf_prepare_set_stacklevel;
823 PUTBACK; 1363 slf_frame.check = slf_check_set_stacklevel;
824 PL_op = (OP *)&myop; 1364}
825 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1365
826 SPAGAIN; 1366/* the tail of transfer: execute stuff we can only do after a transfer */
1367INLINE void
1368transfer_tail (pTHX)
1369{
1370 free_coro_mortal (aTHX);
827} 1371}
828 1372
829/* 1373/*
830 * this is a _very_ stripped down perl interpreter ;) 1374 * this is a _very_ stripped down perl interpreter ;)
831 */ 1375 */
832static void 1376static void
833coro_run (void *arg) 1377cctx_run (void *arg)
834{ 1378{
1379#ifdef USE_ITHREADS
1380# if CORO_PTHREAD
1381 PERL_SET_CONTEXT (coro_thx);
1382# endif
1383#endif
1384 {
835 dTHX; 1385 dTHX;
836 1386
837 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1387 /* normally we would need to skip the entersub here */
838 UNLOCK; 1388 /* not doing so will re-execute it, which is exactly what we want */
839
840 /* we now skip the entersub that lead to transfer() */
841 PL_op = PL_op->op_next; 1389 /* PL_nop = PL_nop->op_next */
842 1390
843 /* inject a fake subroutine call to cctx_init */ 1391 /* inject a fake subroutine call to cctx_init */
844 prepare_cctx (aTHX_ (coro_cctx *)arg); 1392 cctx_prepare (aTHX);
845 1393
1394 /* cctx_run is the alternative tail of transfer() */
1395 transfer_tail (aTHX);
1396
846 /* somebody or something will hit me for both perl_run and PL_restartop */ 1397 /* somebody or something will hit me for both perl_run and PL_restartop */
847 PL_restartop = PL_op; 1398 PL_restartop = PL_op;
848 perl_run (PL_curinterp); 1399 perl_run (PL_curinterp);
849
850 /* 1400 /*
1401 * Unfortunately, there is no way to get at the return values of the
1402 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1403 * runtime errors here, as this is just a random interpreter, not a thread.
1404 */
1405
1406 /*
851 * If perl-run returns we assume exit() was being called or the coro 1407 * If perl-run returns we assume exit() was being called or the coro
852 * fell off the end, which seems to be the only valid (non-bug) 1408 * fell off the end, which seems to be the only valid (non-bug)
853 * reason for perl_run to return. We try to exit by jumping to the 1409 * reason for perl_run to return. We try to exit by jumping to the
854 * bootstrap-time "top" top_env, as we cannot restore the "main" 1410 * bootstrap-time "top" top_env, as we cannot restore the "main"
855 * coroutine as Coro has no such concept 1411 * coroutine as Coro has no such concept.
1412 * This actually isn't valid with the pthread backend, but OSes requiring
1413 * that backend are too broken to do it in a standards-compliant way.
856 */ 1414 */
857 PL_top_env = main_top_env; 1415 PL_top_env = main_top_env;
858 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1416 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1417 }
859} 1418}
860 1419
861static coro_cctx * 1420static coro_cctx *
862cctx_new () 1421cctx_new ()
863{ 1422{
864 coro_cctx *cctx; 1423 coro_cctx *cctx;
1424
1425 ++cctx_count;
1426 New (0, cctx, 1, coro_cctx);
1427
1428 cctx->gen = cctx_gen;
1429 cctx->flags = 0;
1430 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1431
1432 return cctx;
1433}
1434
1435/* create a new cctx only suitable as source */
1436static coro_cctx *
1437cctx_new_empty ()
1438{
1439 coro_cctx *cctx = cctx_new ();
1440
1441 cctx->sptr = 0;
1442 coro_create (&cctx->cctx, 0, 0, 0, 0);
1443
1444 return cctx;
1445}
1446
1447/* create a new cctx suitable as destination/running a perl interpreter */
1448static coro_cctx *
1449cctx_new_run ()
1450{
1451 coro_cctx *cctx = cctx_new ();
865 void *stack_start; 1452 void *stack_start;
866 size_t stack_size; 1453 size_t stack_size;
867 1454
868 ++cctx_count;
869
870 Newz (0, cctx, 1, coro_cctx);
871
872#if HAVE_MMAP 1455#if HAVE_MMAP
873
874 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1456 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
875 /* mmap supposedly does allocate-on-write for us */ 1457 /* mmap supposedly does allocate-on-write for us */
876 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1458 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
877 1459
878 if (cctx->sptr != (void *)-1) 1460 if (cctx->sptr != (void *)-1)
879 { 1461 {
880# if CORO_STACKGUARD 1462 #if CORO_STACKGUARD
881 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1463 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
882# endif 1464 #endif
883 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1465 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
884 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1466 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
885 cctx->flags |= CC_MAPPED; 1467 cctx->flags |= CC_MAPPED;
886 } 1468 }
887 else 1469 else
888#endif 1470#endif
889 { 1471 {
890 cctx->ssize = coro_stacksize * (long)sizeof (long); 1472 cctx->ssize = cctx_stacksize * (long)sizeof (long);
891 New (0, cctx->sptr, coro_stacksize, long); 1473 New (0, cctx->sptr, cctx_stacksize, long);
892 1474
893 if (!cctx->sptr) 1475 if (!cctx->sptr)
894 { 1476 {
895 perror ("FATAL: unable to allocate stack for coroutine"); 1477 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
896 _exit (EXIT_FAILURE); 1478 _exit (EXIT_FAILURE);
897 } 1479 }
898 1480
899 stack_start = cctx->sptr; 1481 stack_start = cctx->sptr;
900 stack_size = cctx->ssize; 1482 stack_size = cctx->ssize;
901 } 1483 }
902 1484
903 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1485 #if CORO_USE_VALGRIND
1486 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1487 #endif
1488
904 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1489 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
905 1490
906 return cctx; 1491 return cctx;
907} 1492}
908 1493
909static void 1494static void
910cctx_destroy (coro_cctx *cctx) 1495cctx_destroy (coro_cctx *cctx)
911{ 1496{
912 if (!cctx) 1497 if (!cctx)
913 return; 1498 return;
914 1499
1500 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1501
915 --cctx_count; 1502 --cctx_count;
1503 coro_destroy (&cctx->cctx);
916 1504
1505 /* coro_transfer creates new, empty cctx's */
1506 if (cctx->sptr)
1507 {
917#if CORO_USE_VALGRIND 1508 #if CORO_USE_VALGRIND
918 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1509 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1510 #endif
1511
1512#if HAVE_MMAP
1513 if (cctx->flags & CC_MAPPED)
1514 munmap (cctx->sptr, cctx->ssize);
1515 else
919#endif 1516#endif
920
921#if HAVE_MMAP
922 if (cctx->flags & CC_MAPPED)
923 munmap (cctx->sptr, cctx->ssize);
924 else
925#endif
926 Safefree (cctx->sptr); 1517 Safefree (cctx->sptr);
1518 }
927 1519
928 Safefree (cctx); 1520 Safefree (cctx);
929} 1521}
1522
1523/* wether this cctx should be destructed */
1524#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
930 1525
931static coro_cctx * 1526static coro_cctx *
932cctx_get (pTHX) 1527cctx_get (pTHX)
933{ 1528{
934 while (cctx_first) 1529 while (expect_true (cctx_first))
935 { 1530 {
936 coro_cctx *cctx = cctx_first; 1531 coro_cctx *cctx = cctx_first;
937 cctx_first = cctx->next; 1532 cctx_first = cctx->next;
938 --cctx_idle; 1533 --cctx_idle;
939 1534
940 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1535 if (expect_true (!CCTX_EXPIRED (cctx)))
941 return cctx; 1536 return cctx;
942 1537
943 cctx_destroy (cctx); 1538 cctx_destroy (cctx);
944 } 1539 }
945 1540
946 return cctx_new (); 1541 return cctx_new_run ();
947} 1542}
948 1543
949static void 1544static void
950cctx_put (coro_cctx *cctx) 1545cctx_put (coro_cctx *cctx)
951{ 1546{
1547 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1548
952 /* free another cctx if overlimit */ 1549 /* free another cctx if overlimit */
953 if (cctx_idle >= MAX_IDLE_CCTX) 1550 if (expect_false (cctx_idle >= cctx_max_idle))
954 { 1551 {
955 coro_cctx *first = cctx_first; 1552 coro_cctx *first = cctx_first;
956 cctx_first = first->next; 1553 cctx_first = first->next;
957 --cctx_idle; 1554 --cctx_idle;
958 1555
… …
964 cctx_first = cctx; 1561 cctx_first = cctx;
965} 1562}
966 1563
967/** coroutine switching *****************************************************/ 1564/** coroutine switching *****************************************************/
968 1565
969static void NOINLINE 1566static void
970transfer_check (pTHX_ struct coro *prev, struct coro *next) 1567transfer_check (pTHX_ struct coro *prev, struct coro *next)
971{ 1568{
972 if (prev != next) 1569 /* TODO: throwing up here is considered harmful */
1570
1571 if (expect_true (prev != next))
973 { 1572 {
974 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1573 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
975 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1574 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
976 1575
977 if (next->flags & CF_RUNNING) 1576 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
978 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
979
980 if (next->flags & CF_DESTROYED)
981 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1577 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
982 1578
1579#if !PERL_VERSION_ATLEAST (5,10,0)
983 if (PL_lex_state != LEX_NOTPARSING) 1580 if (expect_false (PL_lex_state != LEX_NOTPARSING))
984 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1581 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1582#endif
985 } 1583 }
986} 1584}
987 1585
988/* always use the TRANSFER macro */ 1586/* always use the TRANSFER macro */
989static void NOINLINE 1587static void NOINLINE /* noinline so we have a fixed stackframe */
990transfer (pTHX_ struct coro *prev, struct coro *next) 1588transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
991{ 1589{
992 dSTACKLEVEL; 1590 dSTACKLEVEL;
993 1591
994 /* sometimes transfer is only called to set idle_sp */ 1592 /* sometimes transfer is only called to set idle_sp */
995 if (!next) 1593 if (expect_false (!prev))
996 { 1594 {
997 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1595 cctx_current->idle_sp = STACKLEVEL;
998 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1596 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
999 }
1000 else if (prev != next)
1001 { 1597 }
1598 else if (expect_true (prev != next))
1599 {
1002 coro_cctx *prev__cctx; 1600 coro_cctx *cctx_prev;
1003 1601
1004 if (prev->flags & CF_NEW) 1602 if (expect_false (prev->flags & CF_NEW))
1005 { 1603 {
1006 /* create a new empty context */ 1604 /* create a new empty/source context */
1007 Newz (0, prev->cctx, 1, coro_cctx);
1008 prev->flags &= ~CF_NEW; 1605 prev->flags &= ~CF_NEW;
1009 prev->flags |= CF_RUNNING; 1606 prev->flags |= CF_RUNNING;
1010 } 1607 }
1011 1608
1012 prev->flags &= ~CF_RUNNING; 1609 prev->flags &= ~CF_RUNNING;
1013 next->flags |= CF_RUNNING; 1610 next->flags |= CF_RUNNING;
1014 1611
1015 LOCK; 1612 /* first get rid of the old state */
1613 save_perl (aTHX_ prev);
1016 1614
1017 if (next->flags & CF_NEW) 1615 if (expect_false (next->flags & CF_NEW))
1018 { 1616 {
1019 /* need to start coroutine */ 1617 /* need to start coroutine */
1020 next->flags &= ~CF_NEW; 1618 next->flags &= ~CF_NEW;
1021 /* first get rid of the old state */
1022 save_perl (aTHX_ prev);
1023 /* setup coroutine call */ 1619 /* setup coroutine call */
1024 coro_setup (aTHX_ next); 1620 init_perl (aTHX_ next);
1025 } 1621 }
1026 else 1622 else
1623 load_perl (aTHX_ next);
1624
1625 /* possibly untie and reuse the cctx */
1626 if (expect_true (
1627 cctx_current->idle_sp == STACKLEVEL
1628 && !(cctx_current->flags & CC_TRACE)
1629 && !force_cctx
1630 ))
1027 { 1631 {
1028 /* coroutine already started */ 1632 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1029 save_perl (aTHX_ prev); 1633 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1030 load_perl (aTHX_ next); 1634
1635 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1636 /* without this the next cctx_get might destroy the running cctx while still in use */
1637 if (expect_false (CCTX_EXPIRED (cctx_current)))
1638 if (expect_true (!next->cctx))
1639 next->cctx = cctx_get (aTHX);
1640
1641 cctx_put (cctx_current);
1031 } 1642 }
1643 else
1644 prev->cctx = cctx_current;
1032 1645
1033 prev__cctx = prev->cctx; 1646 ++next->usecount;
1034 1647
1035 /* possibly "free" the cctx */ 1648 cctx_prev = cctx_current;
1036 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1649 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1650
1651 next->cctx = 0;
1652
1653 if (expect_false (cctx_prev != cctx_current))
1037 { 1654 {
1038 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1655 cctx_prev->top_env = PL_top_env;
1039 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1656 PL_top_env = cctx_current->top_env;
1040 1657 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1041 prev->cctx = 0;
1042
1043 cctx_put (prev__cctx);
1044 } 1658 }
1045 1659
1046 ++next->usecount; 1660 transfer_tail (aTHX);
1047
1048 if (!next->cctx)
1049 next->cctx = cctx_get (aTHX);
1050
1051 if (prev__cctx != next->cctx)
1052 {
1053 prev__cctx->top_env = PL_top_env;
1054 PL_top_env = next->cctx->top_env;
1055 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1056 }
1057
1058 free_coro_mortal (aTHX);
1059 UNLOCK;
1060 } 1661 }
1061} 1662}
1062 1663
1063struct transfer_args
1064{
1065 struct coro *prev, *next;
1066};
1067
1068#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1664#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1069#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1665#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1070 1666
1071/** high level stuff ********************************************************/ 1667/** high level stuff ********************************************************/
1072 1668
1073static int 1669static int
1074coro_state_destroy (pTHX_ struct coro *coro) 1670coro_state_destroy (pTHX_ struct coro *coro)
1075{ 1671{
1076 if (coro->flags & CF_DESTROYED) 1672 if (coro->flags & CF_DESTROYED)
1077 return 0; 1673 return 0;
1674
1675 if (coro->on_destroy && !PL_dirty)
1676 coro->on_destroy (aTHX_ coro);
1078 1677
1079 coro->flags |= CF_DESTROYED; 1678 coro->flags |= CF_DESTROYED;
1080 1679
1081 if (coro->flags & CF_READY) 1680 if (coro->flags & CF_READY)
1082 { 1681 {
1083 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1682 /* reduce nready, as destroying a ready coro effectively unreadies it */
1084 /* alternative: look through all ready queues and remove the coro */ 1683 /* alternative: look through all ready queues and remove the coro */
1085 LOCK;
1086 --coro_nready; 1684 --coro_nready;
1087 UNLOCK;
1088 } 1685 }
1089 else 1686 else
1090 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1687 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1091 1688
1092 if (coro->mainstack && coro->mainstack != main_mainstack) 1689 if (coro->mainstack
1093 { 1690 && coro->mainstack != main_mainstack
1094 struct coro temp; 1691 && coro->slot
1095 1692 && !PL_dirty)
1096 if (coro->flags & CF_RUNNING)
1097 croak ("FATAL: tried to destroy currently running coroutine");
1098
1099 save_perl (aTHX_ &temp);
1100 load_perl (aTHX_ coro); 1693 destroy_perl (aTHX_ coro);
1101
1102 coro_destroy (aTHX_ coro);
1103
1104 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1105
1106 coro->mainstack = 0;
1107 }
1108
1109 cctx_destroy (coro->cctx);
1110 SvREFCNT_dec (coro->args);
1111 1694
1112 if (coro->next) coro->next->prev = coro->prev; 1695 if (coro->next) coro->next->prev = coro->prev;
1113 if (coro->prev) coro->prev->next = coro->next; 1696 if (coro->prev) coro->prev->next = coro->next;
1114 if (coro == coro_first) coro_first = coro->next; 1697 if (coro == coro_first) coro_first = coro->next;
1698
1699 cctx_destroy (coro->cctx);
1700 SvREFCNT_dec (coro->startcv);
1701 SvREFCNT_dec (coro->args);
1702 SvREFCNT_dec (coro->swap_sv);
1703 SvREFCNT_dec (CORO_THROW);
1115 1704
1116 return 1; 1705 return 1;
1117} 1706}
1118 1707
1119static int 1708static int
… …
1153# define MGf_DUP 0 1742# define MGf_DUP 0
1154#endif 1743#endif
1155}; 1744};
1156 1745
1157static void 1746static void
1158prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1747prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1159{ 1748{
1160 ta->prev = SvSTATE (prev_sv); 1749 ta->prev = SvSTATE (prev_sv);
1161 ta->next = SvSTATE (next_sv); 1750 ta->next = SvSTATE (next_sv);
1162 TRANSFER_CHECK (*ta); 1751 TRANSFER_CHECK (*ta);
1163} 1752}
1164 1753
1165static void 1754static void
1166api_transfer (SV *prev_sv, SV *next_sv) 1755api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1756{
1757 struct coro_transfer_args ta;
1758
1759 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1760 TRANSFER (ta, 1);
1761}
1762
1763/** Coro ********************************************************************/
1764
1765INLINE void
1766coro_enq (pTHX_ struct coro *coro)
1767{
1768 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1769
1770 SvREFCNT_inc_NN (coro->hv);
1771
1772 coro->next_ready = 0;
1773 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1774 ready [1] = coro;
1775}
1776
1777INLINE struct coro *
1778coro_deq (pTHX)
1779{
1780 int prio;
1781
1782 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1783 {
1784 struct coro **ready = coro_ready [prio];
1785
1786 if (ready [0])
1787 {
1788 struct coro *coro = ready [0];
1789 ready [0] = coro->next_ready;
1790 return coro;
1791 }
1792 }
1793
1794 return 0;
1795}
1796
1797static void
1798invoke_sv_ready_hook_helper (void)
1167{ 1799{
1168 dTHX; 1800 dTHX;
1169 struct transfer_args ta; 1801 dSP;
1170 1802
1171 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1803 ENTER;
1172 TRANSFER (ta); 1804 SAVETMPS;
1173}
1174 1805
1175/** Coro ********************************************************************/ 1806 PUSHMARK (SP);
1807 PUTBACK;
1808 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1176 1809
1177static void 1810 FREETMPS;
1178coro_enq (pTHX_ SV *coro_sv) 1811 LEAVE;
1179{
1180 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1181}
1182
1183static SV *
1184coro_deq (pTHX_ int min_prio)
1185{
1186 int prio = PRIO_MAX - PRIO_MIN;
1187
1188 min_prio -= PRIO_MIN;
1189 if (min_prio < 0)
1190 min_prio = 0;
1191
1192 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1193 if (AvFILLp (coro_ready [prio]) >= 0)
1194 return av_shift (coro_ready [prio]);
1195
1196 return 0;
1197} 1812}
1198 1813
1199static int 1814static int
1200api_ready (SV *coro_sv) 1815api_ready (pTHX_ SV *coro_sv)
1201{ 1816{
1202 dTHX;
1203 struct coro *coro;
1204
1205 if (SvROK (coro_sv))
1206 coro_sv = SvRV (coro_sv);
1207
1208 coro = SvSTATE (coro_sv); 1817 struct coro *coro = SvSTATE (coro_sv);
1209 1818
1210 if (coro->flags & CF_READY) 1819 if (coro->flags & CF_READY)
1211 return 0; 1820 return 0;
1212 1821
1213 coro->flags |= CF_READY; 1822 coro->flags |= CF_READY;
1214 1823
1215 LOCK; 1824 coro_enq (aTHX_ coro);
1216 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1825
1217 ++coro_nready; 1826 if (!coro_nready++)
1218 UNLOCK; 1827 if (coroapi.readyhook)
1828 coroapi.readyhook ();
1219 1829
1220 return 1; 1830 return 1;
1221} 1831}
1222 1832
1223static int 1833static int
1224api_is_ready (SV *coro_sv) 1834api_is_ready (pTHX_ SV *coro_sv)
1225{ 1835{
1226 dTHX;
1227 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1836 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1228} 1837}
1229 1838
1230static void 1839/* expects to own a reference to next->hv */
1840INLINE void
1231prepare_schedule (pTHX_ struct transfer_args *ta) 1841prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1232{ 1842{
1233 SV *prev_sv, *next_sv;
1234
1235 for (;;)
1236 {
1237 LOCK;
1238 next_sv = coro_deq (aTHX_ PRIO_MIN);
1239
1240 /* nothing to schedule: call the idle handler */
1241 if (!next_sv)
1242 {
1243 dSP;
1244 UNLOCK;
1245
1246 ENTER;
1247 SAVETMPS;
1248
1249 PUSHMARK (SP);
1250 PUTBACK;
1251 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1252
1253 FREETMPS;
1254 LEAVE;
1255 continue;
1256 }
1257
1258 ta->next = SvSTATE (next_sv);
1259
1260 /* cannot transfer to destroyed coros, skip and look for next */
1261 if (ta->next->flags & CF_DESTROYED)
1262 {
1263 UNLOCK;
1264 SvREFCNT_dec (next_sv);
1265 /* coro_nready is already taken care of by destroy */
1266 continue;
1267 }
1268
1269 --coro_nready;
1270 UNLOCK;
1271 break;
1272 }
1273
1274 /* free this only after the transfer */
1275 prev_sv = SvRV (coro_current); 1843 SV *prev_sv = SvRV (coro_current);
1844
1276 ta->prev = SvSTATE (prev_sv); 1845 ta->prev = SvSTATE_hv (prev_sv);
1846 ta->next = next;
1847
1277 TRANSFER_CHECK (*ta); 1848 TRANSFER_CHECK (*ta);
1278 assert (ta->next->flags & CF_READY); 1849
1279 ta->next->flags &= ~CF_READY;
1280 SvRV_set (coro_current, next_sv); 1850 SvRV_set (coro_current, (SV *)next->hv);
1281 1851
1282 LOCK;
1283 free_coro_mortal (aTHX); 1852 free_coro_mortal (aTHX);
1284 coro_mortal = prev_sv; 1853 coro_mortal = prev_sv;
1285 UNLOCK;
1286} 1854}
1287 1855
1288static void 1856static void
1857prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1858{
1859 for (;;)
1860 {
1861 struct coro *next = coro_deq (aTHX);
1862
1863 if (expect_true (next))
1864 {
1865 /* cannot transfer to destroyed coros, skip and look for next */
1866 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1867 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1868 else
1869 {
1870 next->flags &= ~CF_READY;
1871 --coro_nready;
1872
1873 prepare_schedule_to (aTHX_ ta, next);
1874 break;
1875 }
1876 }
1877 else
1878 {
1879 /* nothing to schedule: call the idle handler */
1880 if (SvROK (sv_idle)
1881 && SvOBJECT (SvRV (sv_idle)))
1882 {
1883 if (SvRV (sv_idle) == SvRV (coro_current))
1884 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1885
1886 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1887 api_ready (aTHX_ SvRV (sv_idle));
1888 --coro_nready;
1889 }
1890 else
1891 {
1892 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1893 dSP;
1894
1895 ENTER;
1896 SAVETMPS;
1897
1898 PUSHMARK (SP);
1899 PUTBACK;
1900 call_sv (sv_idle, G_VOID | G_DISCARD);
1901
1902 FREETMPS;
1903 LEAVE;
1904 }
1905 }
1906 }
1907}
1908
1909INLINE void
1289prepare_cede (pTHX_ struct transfer_args *ta) 1910prepare_cede (pTHX_ struct coro_transfer_args *ta)
1290{ 1911{
1291 api_ready (coro_current); 1912 api_ready (aTHX_ coro_current);
1292 prepare_schedule (aTHX_ ta); 1913 prepare_schedule (aTHX_ ta);
1293} 1914}
1294 1915
1916INLINE void
1917prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1918{
1919 SV *prev = SvRV (coro_current);
1920
1921 if (coro_nready)
1922 {
1923 prepare_schedule (aTHX_ ta);
1924 api_ready (aTHX_ prev);
1925 }
1926 else
1927 prepare_nop (aTHX_ ta);
1928}
1929
1930static void
1931api_schedule (pTHX)
1932{
1933 struct coro_transfer_args ta;
1934
1935 prepare_schedule (aTHX_ &ta);
1936 TRANSFER (ta, 1);
1937}
1938
1939static void
1940api_schedule_to (pTHX_ SV *coro_sv)
1941{
1942 struct coro_transfer_args ta;
1943 struct coro *next = SvSTATE (coro_sv);
1944
1945 SvREFCNT_inc_NN (coro_sv);
1946 prepare_schedule_to (aTHX_ &ta, next);
1947}
1948
1295static int 1949static int
1296prepare_cede_notself (pTHX_ struct transfer_args *ta) 1950api_cede (pTHX)
1297{ 1951{
1298 if (coro_nready) 1952 struct coro_transfer_args ta;
1299 { 1953
1300 SV *prev = SvRV (coro_current);
1301 prepare_schedule (aTHX_ ta); 1954 prepare_cede (aTHX_ &ta);
1302 api_ready (prev); 1955
1956 if (expect_true (ta.prev != ta.next))
1957 {
1958 TRANSFER (ta, 1);
1303 return 1; 1959 return 1;
1304 } 1960 }
1305 else 1961 else
1306 return 0; 1962 return 0;
1307} 1963}
1308 1964
1309static void
1310api_schedule (void)
1311{
1312 dTHX;
1313 struct transfer_args ta;
1314
1315 prepare_schedule (aTHX_ &ta);
1316 TRANSFER (ta);
1317}
1318
1319static int 1965static int
1320api_cede (void) 1966api_cede_notself (pTHX)
1321{ 1967{
1322 dTHX; 1968 if (coro_nready)
1969 {
1323 struct transfer_args ta; 1970 struct coro_transfer_args ta;
1324 1971
1325 prepare_cede (aTHX_ &ta); 1972 prepare_cede_notself (aTHX_ &ta);
1326
1327 if (ta.prev != ta.next)
1328 {
1329 TRANSFER (ta); 1973 TRANSFER (ta, 1);
1330 return 1; 1974 return 1;
1331 } 1975 }
1332 else 1976 else
1333 return 0; 1977 return 0;
1334} 1978}
1335 1979
1336static int 1980static void
1337api_cede_notself (void)
1338{
1339 dTHX;
1340 struct transfer_args ta;
1341
1342 if (prepare_cede_notself (aTHX_ &ta))
1343 {
1344 TRANSFER (ta);
1345 return 1;
1346 }
1347 else
1348 return 0;
1349}
1350
1351static void
1352api_trace (SV *coro_sv, int flags) 1981api_trace (pTHX_ SV *coro_sv, int flags)
1353{ 1982{
1354 dTHX;
1355 struct coro *coro = SvSTATE (coro_sv); 1983 struct coro *coro = SvSTATE (coro_sv);
1356 1984
1985 if (coro->flags & CF_RUNNING)
1986 croak ("cannot enable tracing on a running coroutine, caught");
1987
1357 if (flags & CC_TRACE) 1988 if (flags & CC_TRACE)
1358 { 1989 {
1359 if (!coro->cctx) 1990 if (!coro->cctx)
1360 coro->cctx = cctx_new (); 1991 coro->cctx = cctx_new_run ();
1361 else if (!(coro->cctx->flags & CC_TRACE)) 1992 else if (!(coro->cctx->flags & CC_TRACE))
1362 croak ("cannot enable tracing on coroutine with custom stack"); 1993 croak ("cannot enable tracing on coroutine with custom stack, caught");
1363 1994
1364 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1995 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1365 } 1996 }
1366 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1997 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1367 { 1998 {
1368 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1999 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1369 2000
1370 if (coro->flags & CF_RUNNING) 2001 if (coro->flags & CF_RUNNING)
1371 PL_runops = RUNOPS_DEFAULT; 2002 PL_runops = RUNOPS_DEFAULT;
1372 else 2003 else
1373 coro->runops = RUNOPS_DEFAULT; 2004 coro->slot->runops = RUNOPS_DEFAULT;
2005 }
2006}
2007
2008static void
2009coro_call_on_destroy (pTHX_ struct coro *coro)
2010{
2011 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2012 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2013
2014 if (on_destroyp)
2015 {
2016 AV *on_destroy = (AV *)SvRV (*on_destroyp);
2017
2018 while (AvFILLp (on_destroy) >= 0)
2019 {
2020 dSP; /* don't disturb outer sp */
2021 SV *cb = av_pop (on_destroy);
2022
2023 PUSHMARK (SP);
2024
2025 if (statusp)
2026 {
2027 int i;
2028 AV *status = (AV *)SvRV (*statusp);
2029 EXTEND (SP, AvFILLp (status) + 1);
2030
2031 for (i = 0; i <= AvFILLp (status); ++i)
2032 PUSHs (AvARRAY (status)[i]);
2033 }
2034
2035 PUTBACK;
2036 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2037 }
2038 }
2039}
2040
2041static void
2042slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2043{
2044 int i;
2045 HV *hv = (HV *)SvRV (coro_current);
2046 AV *av = newAV ();
2047
2048 /* items are actually not so common, so optimise for this case */
2049 if (items)
2050 {
2051 av_extend (av, items - 1);
2052
2053 for (i = 0; i < items; ++i)
2054 av_push (av, SvREFCNT_inc_NN (arg [i]));
2055 }
2056
2057 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2058
2059 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2060 api_ready (aTHX_ sv_manager);
2061
2062 frame->prepare = prepare_schedule;
2063 frame->check = slf_check_repeat;
2064
2065 /* as a minor optimisation, we could unwind all stacks here */
2066 /* but that puts extra pressure on pp_slf, and is not worth much */
2067 /*coro_unwind_stacks (aTHX);*/
2068}
2069
2070/*****************************************************************************/
2071/* async pool handler */
2072
2073static int
2074slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2075{
2076 HV *hv = (HV *)SvRV (coro_current);
2077 struct coro *coro = (struct coro *)frame->data;
2078
2079 if (!coro->invoke_cb)
2080 return 1; /* loop till we have invoke */
2081 else
2082 {
2083 hv_store (hv, "desc", sizeof ("desc") - 1,
2084 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2085
2086 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2087
2088 {
2089 dSP;
2090 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2091 PUTBACK;
1374 } 2092 }
2093
2094 SvREFCNT_dec (GvAV (PL_defgv));
2095 GvAV (PL_defgv) = coro->invoke_av;
2096 coro->invoke_av = 0;
2097
2098 return 0;
2099 }
2100}
2101
2102static void
2103slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 HV *hv = (HV *)SvRV (coro_current);
2106 struct coro *coro = SvSTATE_hv ((SV *)hv);
2107
2108 if (expect_true (coro->saved_deffh))
2109 {
2110 /* subsequent iteration */
2111 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2112 coro->saved_deffh = 0;
2113
2114 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2115 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2116 {
2117 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2118 coro->invoke_av = newAV ();
2119
2120 frame->prepare = prepare_nop;
2121 }
2122 else
2123 {
2124 av_clear (GvAV (PL_defgv));
2125 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2126
2127 coro->prio = 0;
2128
2129 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2130 api_trace (aTHX_ coro_current, 0);
2131
2132 frame->prepare = prepare_schedule;
2133 av_push (av_async_pool, SvREFCNT_inc (hv));
2134 }
2135 }
2136 else
2137 {
2138 /* first iteration, simply fall through */
2139 frame->prepare = prepare_nop;
2140 }
2141
2142 frame->check = slf_check_pool_handler;
2143 frame->data = (void *)coro;
2144}
2145
2146/*****************************************************************************/
2147/* rouse callback */
2148
2149#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2150
2151static void
2152coro_rouse_callback (pTHX_ CV *cv)
2153{
2154 dXSARGS;
2155 SV *data = (SV *)S_GENSUB_ARG;
2156
2157 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2158 {
2159 /* first call, set args */
2160 SV *coro = SvRV (data);
2161 AV *av = newAV ();
2162
2163 SvRV_set (data, (SV *)av);
2164
2165 /* better take a full copy of the arguments */
2166 while (items--)
2167 av_store (av, items, newSVsv (ST (items)));
2168
2169 api_ready (aTHX_ coro);
2170 SvREFCNT_dec (coro);
2171 }
2172
2173 XSRETURN_EMPTY;
2174}
2175
2176static int
2177slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2178{
2179 SV *data = (SV *)frame->data;
2180
2181 if (CORO_THROW)
2182 return 0;
2183
2184 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2185 return 1;
2186
2187 /* now push all results on the stack */
2188 {
2189 dSP;
2190 AV *av = (AV *)SvRV (data);
2191 int i;
2192
2193 EXTEND (SP, AvFILLp (av) + 1);
2194 for (i = 0; i <= AvFILLp (av); ++i)
2195 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2196
2197 /* we have stolen the elements, so set length to zero and free */
2198 AvFILLp (av) = -1;
2199 av_undef (av);
2200
2201 PUTBACK;
2202 }
2203
2204 return 0;
2205}
2206
2207static void
2208slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 SV *cb;
2211
2212 if (items)
2213 cb = arg [0];
2214 else
2215 {
2216 struct coro *coro = SvSTATE_current;
2217
2218 if (!coro->rouse_cb)
2219 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2220
2221 cb = sv_2mortal (coro->rouse_cb);
2222 coro->rouse_cb = 0;
2223 }
2224
2225 if (!SvROK (cb)
2226 || SvTYPE (SvRV (cb)) != SVt_PVCV
2227 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2228 croak ("Coro::rouse_wait called with illegal callback argument,");
2229
2230 {
2231 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2232 SV *data = (SV *)S_GENSUB_ARG;
2233
2234 frame->data = (void *)data;
2235 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2236 frame->check = slf_check_rouse_wait;
2237 }
2238}
2239
2240static SV *
2241coro_new_rouse_cb (pTHX)
2242{
2243 HV *hv = (HV *)SvRV (coro_current);
2244 struct coro *coro = SvSTATE_hv (hv);
2245 SV *data = newRV_inc ((SV *)hv);
2246 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2247
2248 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2249 SvREFCNT_dec (data); /* magicext increases the refcount */
2250
2251 SvREFCNT_dec (coro->rouse_cb);
2252 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2253
2254 return cb;
2255}
2256
2257/*****************************************************************************/
2258/* schedule-like-function opcode (SLF) */
2259
2260static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2261static const CV *slf_cv;
2262static SV **slf_argv;
2263static int slf_argc, slf_arga; /* count, allocated */
2264static I32 slf_ax; /* top of stack, for restore */
2265
2266/* this restores the stack in the case we patched the entersub, to */
2267/* recreate the stack frame as perl will on following calls */
2268/* since entersub cleared the stack */
2269static OP *
2270pp_restore (pTHX)
2271{
2272 int i;
2273 SV **SP = PL_stack_base + slf_ax;
2274
2275 PUSHMARK (SP);
2276
2277 EXTEND (SP, slf_argc + 1);
2278
2279 for (i = 0; i < slf_argc; ++i)
2280 PUSHs (sv_2mortal (slf_argv [i]));
2281
2282 PUSHs ((SV *)CvGV (slf_cv));
2283
2284 RETURNOP (slf_restore.op_first);
2285}
2286
2287static void
2288slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2289{
2290 SV **arg = (SV **)slf_frame.data;
2291
2292 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2293}
2294
2295static void
2296slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2297{
2298 if (items != 2)
2299 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2300
2301 frame->prepare = slf_prepare_transfer;
2302 frame->check = slf_check_nop;
2303 frame->data = (void *)arg; /* let's hope it will stay valid */
2304}
2305
2306static void
2307slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2308{
2309 frame->prepare = prepare_schedule;
2310 frame->check = slf_check_nop;
2311}
2312
2313static void
2314slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2315{
2316 struct coro *next = (struct coro *)slf_frame.data;
2317
2318 SvREFCNT_inc_NN (next->hv);
2319 prepare_schedule_to (aTHX_ ta, next);
2320}
2321
2322static void
2323slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2324{
2325 if (!items)
2326 croak ("Coro::schedule_to expects a coroutine argument, caught");
2327
2328 frame->data = (void *)SvSTATE (arg [0]);
2329 frame->prepare = slf_prepare_schedule_to;
2330 frame->check = slf_check_nop;
2331}
2332
2333static void
2334slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2335{
2336 api_ready (aTHX_ SvRV (coro_current));
2337
2338 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2339}
2340
2341static void
2342slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2343{
2344 frame->prepare = prepare_cede;
2345 frame->check = slf_check_nop;
2346}
2347
2348static void
2349slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 frame->prepare = prepare_cede_notself;
2352 frame->check = slf_check_nop;
2353}
2354
2355/*
2356 * these not obviously related functions are all rolled into one
2357 * function to increase chances that they all will call transfer with the same
2358 * stack offset
2359 * SLF stands for "schedule-like-function".
2360 */
2361static OP *
2362pp_slf (pTHX)
2363{
2364 I32 checkmark; /* mark SP to see how many elements check has pushed */
2365
2366 /* set up the slf frame, unless it has already been set-up */
2367 /* the latter happens when a new coro has been started */
2368 /* or when a new cctx was attached to an existing coroutine */
2369 if (expect_true (!slf_frame.prepare))
2370 {
2371 /* first iteration */
2372 dSP;
2373 SV **arg = PL_stack_base + TOPMARK + 1;
2374 int items = SP - arg; /* args without function object */
2375 SV *gv = *sp;
2376
2377 /* do a quick consistency check on the "function" object, and if it isn't */
2378 /* for us, divert to the real entersub */
2379 if (SvTYPE (gv) != SVt_PVGV
2380 || !GvCV (gv)
2381 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2382 return PL_ppaddr[OP_ENTERSUB](aTHX);
2383
2384 if (!(PL_op->op_flags & OPf_STACKED))
2385 {
2386 /* ampersand-form of call, use @_ instead of stack */
2387 AV *av = GvAV (PL_defgv);
2388 arg = AvARRAY (av);
2389 items = AvFILLp (av) + 1;
2390 }
2391
2392 /* now call the init function, which needs to set up slf_frame */
2393 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2394 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2395
2396 /* pop args */
2397 SP = PL_stack_base + POPMARK;
2398
2399 PUTBACK;
2400 }
2401
2402 /* now that we have a slf_frame, interpret it! */
2403 /* we use a callback system not to make the code needlessly */
2404 /* complicated, but so we can run multiple perl coros from one cctx */
2405
2406 do
2407 {
2408 struct coro_transfer_args ta;
2409
2410 slf_frame.prepare (aTHX_ &ta);
2411 TRANSFER (ta, 0);
2412
2413 checkmark = PL_stack_sp - PL_stack_base;
2414 }
2415 while (slf_frame.check (aTHX_ &slf_frame));
2416
2417 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2418
2419 /* exception handling */
2420 if (expect_false (CORO_THROW))
2421 {
2422 SV *exception = sv_2mortal (CORO_THROW);
2423
2424 CORO_THROW = 0;
2425 sv_setsv (ERRSV, exception);
2426 croak (0);
2427 }
2428
2429 /* return value handling - mostly like entersub */
2430 /* make sure we put something on the stack in scalar context */
2431 if (GIMME_V == G_SCALAR)
2432 {
2433 dSP;
2434 SV **bot = PL_stack_base + checkmark;
2435
2436 if (sp == bot) /* too few, push undef */
2437 bot [1] = &PL_sv_undef;
2438 else if (sp != bot + 1) /* too many, take last one */
2439 bot [1] = *sp;
2440
2441 SP = bot + 1;
2442
2443 PUTBACK;
2444 }
2445
2446 return NORMAL;
2447}
2448
2449static void
2450api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2451{
2452 int i;
2453 SV **arg = PL_stack_base + ax;
2454 int items = PL_stack_sp - arg + 1;
2455
2456 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2457
2458 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2459 && PL_op->op_ppaddr != pp_slf)
2460 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2461
2462 CvFLAGS (cv) |= CVf_SLF;
2463 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2464 slf_cv = cv;
2465
2466 /* we patch the op, and then re-run the whole call */
2467 /* we have to put the same argument on the stack for this to work */
2468 /* and this will be done by pp_restore */
2469 slf_restore.op_next = (OP *)&slf_restore;
2470 slf_restore.op_type = OP_CUSTOM;
2471 slf_restore.op_ppaddr = pp_restore;
2472 slf_restore.op_first = PL_op;
2473
2474 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2475
2476 if (PL_op->op_flags & OPf_STACKED)
2477 {
2478 if (items > slf_arga)
2479 {
2480 slf_arga = items;
2481 Safefree (slf_argv);
2482 New (0, slf_argv, slf_arga, SV *);
2483 }
2484
2485 slf_argc = items;
2486
2487 for (i = 0; i < items; ++i)
2488 slf_argv [i] = SvREFCNT_inc (arg [i]);
2489 }
2490 else
2491 slf_argc = 0;
2492
2493 PL_op->op_ppaddr = pp_slf;
2494 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2495
2496 PL_op = (OP *)&slf_restore;
2497}
2498
2499/*****************************************************************************/
2500/* dynamic wind */
2501
2502static void
2503on_enterleave_call (pTHX_ SV *cb)
2504{
2505 dSP;
2506
2507 PUSHSTACK;
2508
2509 PUSHMARK (SP);
2510 PUTBACK;
2511 call_sv (cb, G_VOID | G_DISCARD);
2512 SPAGAIN;
2513
2514 POPSTACK;
2515}
2516
2517static SV *
2518coro_avp_pop_and_free (pTHX_ AV **avp)
2519{
2520 AV *av = *avp;
2521 SV *res = av_pop (av);
2522
2523 if (AvFILLp (av) < 0)
2524 {
2525 *avp = 0;
2526 SvREFCNT_dec (av);
2527 }
2528
2529 return res;
2530}
2531
2532static void
2533coro_pop_on_enter (pTHX_ void *coro)
2534{
2535 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2536 SvREFCNT_dec (cb);
2537}
2538
2539static void
2540coro_pop_on_leave (pTHX_ void *coro)
2541{
2542 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2543 on_enterleave_call (aTHX_ sv_2mortal (cb));
2544}
2545
2546/*****************************************************************************/
2547/* PerlIO::cede */
2548
2549typedef struct
2550{
2551 PerlIOBuf base;
2552 NV next, every;
2553} PerlIOCede;
2554
2555static IV
2556PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2557{
2558 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2559
2560 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2561 self->next = nvtime () + self->every;
2562
2563 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2564}
2565
2566static SV *
2567PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2568{
2569 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2570
2571 return newSVnv (self->every);
2572}
2573
2574static IV
2575PerlIOCede_flush (pTHX_ PerlIO *f)
2576{
2577 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2578 double now = nvtime ();
2579
2580 if (now >= self->next)
2581 {
2582 api_cede (aTHX);
2583 self->next = now + self->every;
2584 }
2585
2586 return PerlIOBuf_flush (aTHX_ f);
2587}
2588
2589static PerlIO_funcs PerlIO_cede =
2590{
2591 sizeof(PerlIO_funcs),
2592 "cede",
2593 sizeof(PerlIOCede),
2594 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2595 PerlIOCede_pushed,
2596 PerlIOBuf_popped,
2597 PerlIOBuf_open,
2598 PerlIOBase_binmode,
2599 PerlIOCede_getarg,
2600 PerlIOBase_fileno,
2601 PerlIOBuf_dup,
2602 PerlIOBuf_read,
2603 PerlIOBuf_unread,
2604 PerlIOBuf_write,
2605 PerlIOBuf_seek,
2606 PerlIOBuf_tell,
2607 PerlIOBuf_close,
2608 PerlIOCede_flush,
2609 PerlIOBuf_fill,
2610 PerlIOBase_eof,
2611 PerlIOBase_error,
2612 PerlIOBase_clearerr,
2613 PerlIOBase_setlinebuf,
2614 PerlIOBuf_get_base,
2615 PerlIOBuf_bufsiz,
2616 PerlIOBuf_get_ptr,
2617 PerlIOBuf_get_cnt,
2618 PerlIOBuf_set_ptrcnt,
2619};
2620
2621/*****************************************************************************/
2622/* Coro::Semaphore & Coro::Signal */
2623
2624static SV *
2625coro_waitarray_new (pTHX_ int count)
2626{
2627 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2628 AV *av = newAV ();
2629 SV **ary;
2630
2631 /* unfortunately, building manually saves memory */
2632 Newx (ary, 2, SV *);
2633 AvALLOC (av) = ary;
2634#if PERL_VERSION_ATLEAST (5,10,0)
2635 AvARRAY (av) = ary;
2636#else
2637 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2638 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2639 SvPVX ((SV *)av) = (char *)ary;
2640#endif
2641 AvMAX (av) = 1;
2642 AvFILLp (av) = 0;
2643 ary [0] = newSViv (count);
2644
2645 return newRV_noinc ((SV *)av);
2646}
2647
2648/* semaphore */
2649
2650static void
2651coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2652{
2653 SV *count_sv = AvARRAY (av)[0];
2654 IV count = SvIVX (count_sv);
2655
2656 count += adjust;
2657 SvIVX (count_sv) = count;
2658
2659 /* now wake up as many waiters as are expected to lock */
2660 while (count > 0 && AvFILLp (av) > 0)
2661 {
2662 SV *cb;
2663
2664 /* swap first two elements so we can shift a waiter */
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = count_sv;
2667 cb = av_shift (av);
2668
2669 if (SvOBJECT (cb))
2670 {
2671 api_ready (aTHX_ cb);
2672 --count;
2673 }
2674 else if (SvTYPE (cb) == SVt_PVCV)
2675 {
2676 dSP;
2677 PUSHMARK (SP);
2678 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2679 PUTBACK;
2680 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2681 }
2682
2683 SvREFCNT_dec (cb);
2684 }
2685}
2686
2687static void
2688coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2689{
2690 /* call $sem->adjust (0) to possibly wake up some other waiters */
2691 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2692}
2693
2694static int
2695slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2696{
2697 AV *av = (AV *)frame->data;
2698 SV *count_sv = AvARRAY (av)[0];
2699
2700 /* if we are about to throw, don't actually acquire the lock, just throw */
2701 if (CORO_THROW)
2702 return 0;
2703 else if (SvIVX (count_sv) > 0)
2704 {
2705 SvSTATE_current->on_destroy = 0;
2706
2707 if (acquire)
2708 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2709 else
2710 coro_semaphore_adjust (aTHX_ av, 0);
2711
2712 return 0;
2713 }
2714 else
2715 {
2716 int i;
2717 /* if we were woken up but can't down, we look through the whole */
2718 /* waiters list and only add us if we aren't in there already */
2719 /* this avoids some degenerate memory usage cases */
2720
2721 for (i = 1; i <= AvFILLp (av); ++i)
2722 if (AvARRAY (av)[i] == SvRV (coro_current))
2723 return 1;
2724
2725 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2726 return 1;
2727 }
2728}
2729
2730static int
2731slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2732{
2733 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2734}
2735
2736static int
2737slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2738{
2739 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2740}
2741
2742static void
2743slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2744{
2745 AV *av = (AV *)SvRV (arg [0]);
2746
2747 if (SvIVX (AvARRAY (av)[0]) > 0)
2748 {
2749 frame->data = (void *)av;
2750 frame->prepare = prepare_nop;
2751 }
2752 else
2753 {
2754 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2755
2756 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2757 frame->prepare = prepare_schedule;
2758
2759 /* to avoid race conditions when a woken-up coro gets terminated */
2760 /* we arrange for a temporary on_destroy that calls adjust (0) */
2761 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2762 }
2763}
2764
2765static void
2766slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2767{
2768 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2769 frame->check = slf_check_semaphore_down;
2770}
2771
2772static void
2773slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2774{
2775 if (items >= 2)
2776 {
2777 /* callback form */
2778 AV *av = (AV *)SvRV (arg [0]);
2779 SV *cb_cv = s_get_cv_croak (arg [1]);
2780
2781 av_push (av, SvREFCNT_inc_NN (cb_cv));
2782
2783 if (SvIVX (AvARRAY (av)[0]) > 0)
2784 coro_semaphore_adjust (aTHX_ av, 0);
2785
2786 frame->prepare = prepare_nop;
2787 frame->check = slf_check_nop;
2788 }
2789 else
2790 {
2791 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2792 frame->check = slf_check_semaphore_wait;
2793 }
2794}
2795
2796/* signal */
2797
2798static void
2799coro_signal_wake (pTHX_ AV *av, int count)
2800{
2801 SvIVX (AvARRAY (av)[0]) = 0;
2802
2803 /* now signal count waiters */
2804 while (count > 0 && AvFILLp (av) > 0)
2805 {
2806 SV *cb;
2807
2808 /* swap first two elements so we can shift a waiter */
2809 cb = AvARRAY (av)[0];
2810 AvARRAY (av)[0] = AvARRAY (av)[1];
2811 AvARRAY (av)[1] = cb;
2812
2813 cb = av_shift (av);
2814
2815 if (SvTYPE (cb) == SVt_PVCV)
2816 {
2817 dSP;
2818 PUSHMARK (SP);
2819 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2820 PUTBACK;
2821 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2822 }
2823 else
2824 {
2825 api_ready (aTHX_ cb);
2826 sv_setiv (cb, 0); /* signal waiter */
2827 }
2828
2829 SvREFCNT_dec (cb);
2830
2831 --count;
2832 }
2833}
2834
2835static int
2836slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2837{
2838 /* if we are about to throw, also stop waiting */
2839 return SvROK ((SV *)frame->data) && !CORO_THROW;
2840}
2841
2842static void
2843slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2844{
2845 AV *av = (AV *)SvRV (arg [0]);
2846
2847 if (items >= 2)
2848 {
2849 SV *cb_cv = s_get_cv_croak (arg [1]);
2850 av_push (av, SvREFCNT_inc_NN (cb_cv));
2851
2852 if (SvIVX (AvARRAY (av)[0]))
2853 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2854
2855 frame->prepare = prepare_nop;
2856 frame->check = slf_check_nop;
2857 }
2858 else if (SvIVX (AvARRAY (av)[0]))
2859 {
2860 SvIVX (AvARRAY (av)[0]) = 0;
2861 frame->prepare = prepare_nop;
2862 frame->check = slf_check_nop;
2863 }
2864 else
2865 {
2866 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2867
2868 av_push (av, waiter);
2869
2870 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2871 frame->prepare = prepare_schedule;
2872 frame->check = slf_check_signal_wait;
2873 }
2874}
2875
2876/*****************************************************************************/
2877/* Coro::AIO */
2878
2879#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2880
2881/* helper storage struct */
2882struct io_state
2883{
2884 int errorno;
2885 I32 laststype; /* U16 in 5.10.0 */
2886 int laststatval;
2887 Stat_t statcache;
2888};
2889
2890static void
2891coro_aio_callback (pTHX_ CV *cv)
2892{
2893 dXSARGS;
2894 AV *state = (AV *)S_GENSUB_ARG;
2895 SV *coro = av_pop (state);
2896 SV *data_sv = newSV (sizeof (struct io_state));
2897
2898 av_extend (state, items - 1);
2899
2900 sv_upgrade (data_sv, SVt_PV);
2901 SvCUR_set (data_sv, sizeof (struct io_state));
2902 SvPOK_only (data_sv);
2903
2904 {
2905 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2906
2907 data->errorno = errno;
2908 data->laststype = PL_laststype;
2909 data->laststatval = PL_laststatval;
2910 data->statcache = PL_statcache;
2911 }
2912
2913 /* now build the result vector out of all the parameters and the data_sv */
2914 {
2915 int i;
2916
2917 for (i = 0; i < items; ++i)
2918 av_push (state, SvREFCNT_inc_NN (ST (i)));
2919 }
2920
2921 av_push (state, data_sv);
2922
2923 api_ready (aTHX_ coro);
2924 SvREFCNT_dec (coro);
2925 SvREFCNT_dec ((AV *)state);
2926}
2927
2928static int
2929slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2930{
2931 AV *state = (AV *)frame->data;
2932
2933 /* if we are about to throw, return early */
2934 /* this does not cancel the aio request, but at least */
2935 /* it quickly returns */
2936 if (CORO_THROW)
2937 return 0;
2938
2939 /* one element that is an RV? repeat! */
2940 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2941 return 1;
2942
2943 /* restore status */
2944 {
2945 SV *data_sv = av_pop (state);
2946 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2947
2948 errno = data->errorno;
2949 PL_laststype = data->laststype;
2950 PL_laststatval = data->laststatval;
2951 PL_statcache = data->statcache;
2952
2953 SvREFCNT_dec (data_sv);
2954 }
2955
2956 /* push result values */
2957 {
2958 dSP;
2959 int i;
2960
2961 EXTEND (SP, AvFILLp (state) + 1);
2962 for (i = 0; i <= AvFILLp (state); ++i)
2963 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2964
2965 PUTBACK;
2966 }
2967
2968 return 0;
2969}
2970
2971static void
2972slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2973{
2974 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2975 SV *coro_hv = SvRV (coro_current);
2976 struct coro *coro = SvSTATE_hv (coro_hv);
2977
2978 /* put our coroutine id on the state arg */
2979 av_push (state, SvREFCNT_inc_NN (coro_hv));
2980
2981 /* first see whether we have a non-zero priority and set it as AIO prio */
2982 if (coro->prio)
2983 {
2984 dSP;
2985
2986 static SV *prio_cv;
2987 static SV *prio_sv;
2988
2989 if (expect_false (!prio_cv))
2990 {
2991 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2992 prio_sv = newSViv (0);
2993 }
2994
2995 PUSHMARK (SP);
2996 sv_setiv (prio_sv, coro->prio);
2997 XPUSHs (prio_sv);
2998
2999 PUTBACK;
3000 call_sv (prio_cv, G_VOID | G_DISCARD);
3001 }
3002
3003 /* now call the original request */
3004 {
3005 dSP;
3006 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3007 int i;
3008
3009 PUSHMARK (SP);
3010
3011 /* first push all args to the stack */
3012 EXTEND (SP, items + 1);
3013
3014 for (i = 0; i < items; ++i)
3015 PUSHs (arg [i]);
3016
3017 /* now push the callback closure */
3018 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3019
3020 /* now call the AIO function - we assume our request is uncancelable */
3021 PUTBACK;
3022 call_sv ((SV *)req, G_VOID | G_DISCARD);
3023 }
3024
3025 /* now that the request is going, we loop till we have a result */
3026 frame->data = (void *)state;
3027 frame->prepare = prepare_schedule;
3028 frame->check = slf_check_aio_req;
3029}
3030
3031static void
3032coro_aio_req_xs (pTHX_ CV *cv)
3033{
3034 dXSARGS;
3035
3036 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3037
3038 XSRETURN_EMPTY;
3039}
3040
3041/*****************************************************************************/
3042
3043#if CORO_CLONE
3044# include "clone.c"
3045#endif
3046
3047/*****************************************************************************/
3048
3049static SV *
3050coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3051{
3052 SV *coro_sv;
3053 struct coro *coro;
3054 MAGIC *mg;
3055 HV *hv;
3056 SV *cb;
3057 int i;
3058
3059 if (argc > 0)
3060 {
3061 cb = s_get_cv_croak (argv [0]);
3062
3063 if (!is_coro)
3064 {
3065 if (CvISXSUB (cb))
3066 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3067
3068 if (!CvROOT (cb))
3069 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3070 }
3071 }
3072
3073 Newz (0, coro, 1, struct coro);
3074 coro->args = newAV ();
3075 coro->flags = CF_NEW;
3076
3077 if (coro_first) coro_first->prev = coro;
3078 coro->next = coro_first;
3079 coro_first = coro;
3080
3081 coro->hv = hv = newHV ();
3082 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3083 mg->mg_flags |= MGf_DUP;
3084 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3085
3086 if (argc > 0)
3087 {
3088 av_extend (coro->args, argc + is_coro - 1);
3089
3090 if (is_coro)
3091 {
3092 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3093 cb = (SV *)cv_coro_run;
3094 }
3095
3096 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3097
3098 for (i = 1; i < argc; i++)
3099 av_push (coro->args, newSVsv (argv [i]));
3100 }
3101
3102 return coro_sv;
1375} 3103}
1376 3104
1377MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3105MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1378 3106
1379PROTOTYPES: DISABLE 3107PROTOTYPES: DISABLE
1380 3108
1381BOOT: 3109BOOT:
1382{ 3110{
1383#ifdef USE_ITHREADS 3111#ifdef USE_ITHREADS
1384 MUTEX_INIT (&coro_mutex); 3112# if CORO_PTHREAD
3113 coro_thx = PERL_GET_CONTEXT;
3114# endif
1385#endif 3115#endif
1386 BOOT_PAGESIZE; 3116 BOOT_PAGESIZE;
1387 3117
3118 cctx_current = cctx_new_empty ();
3119
1388 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3120 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1389 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3121 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3122
3123 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3124 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3125 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3126
3127 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3128 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3129 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1390 3130
1391 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3131 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1392 3132
1393 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3133 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1394 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3134 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1399 main_top_env = PL_top_env; 3139 main_top_env = PL_top_env;
1400 3140
1401 while (main_top_env->je_prev) 3141 while (main_top_env->je_prev)
1402 main_top_env = main_top_env->je_prev; 3142 main_top_env = main_top_env->je_prev;
1403 3143
3144 {
3145 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3146
3147 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3148 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3149
3150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3151 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3152 }
3153
1404 coroapi.ver = CORO_API_VERSION; 3154 coroapi.ver = CORO_API_VERSION;
3155 coroapi.rev = CORO_API_REVISION;
3156
1405 coroapi.transfer = api_transfer; 3157 coroapi.transfer = api_transfer;
1406 3158
3159 coroapi.sv_state = SvSTATE_;
3160 coroapi.execute_slf = api_execute_slf;
3161 coroapi.prepare_nop = prepare_nop;
3162 coroapi.prepare_schedule = prepare_schedule;
3163 coroapi.prepare_cede = prepare_cede;
3164 coroapi.prepare_cede_notself = prepare_cede_notself;
3165
3166 time_init ();
3167
1407 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3168 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1408} 3169}
1409 3170
1410SV * 3171SV *
1411new (char *klass, ...) 3172new (SV *klass, ...)
3173 ALIAS:
3174 Coro::new = 1
1412 CODE: 3175 CODE:
1413{ 3176 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1414 struct coro *coro; 3177 OUTPUT:
1415 HV *hv;
1416 int i;
1417
1418 Newz (0, coro, 1, struct coro);
1419 coro->args = newAV ();
1420 coro->flags = CF_NEW;
1421
1422 if (coro_first) coro_first->prev = coro;
1423 coro->next = coro_first;
1424 coro_first = coro;
1425
1426 coro->hv = hv = newHV ();
1427 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1428 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1429
1430 for (i = 1; i < items; i++)
1431 av_push (coro->args, newSVsv (ST (i)));
1432}
1433 OUTPUT:
1434 RETVAL 3178 RETVAL
1435 3179
1436# these not obviously related functions are all rolled into the same xs
1437# function to increase chances that they all will call transfer with the same
1438# stack offset
1439void 3180void
1440_set_stacklevel (...) 3181transfer (...)
1441 ALIAS: 3182 PROTOTYPE: $$
1442 Coro::State::transfer = 1 3183 CODE:
1443 Coro::schedule = 2 3184 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1444 Coro::cede = 3
1445 Coro::cede_notself = 4
1446 CODE:
1447{
1448 struct transfer_args ta;
1449
1450 switch (ix)
1451 {
1452 case 0:
1453 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1454 ta.next = 0;
1455 break;
1456
1457 case 1:
1458 if (items != 2)
1459 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1460
1461 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1462 break;
1463
1464 case 2:
1465 prepare_schedule (aTHX_ &ta);
1466 break;
1467
1468 case 3:
1469 prepare_cede (aTHX_ &ta);
1470 break;
1471
1472 case 4:
1473 if (!prepare_cede_notself (aTHX_ &ta))
1474 XSRETURN_EMPTY;
1475
1476 break;
1477 }
1478
1479 BARRIER;
1480 TRANSFER (ta);
1481
1482 if (GIMME_V != G_VOID && ta.next != ta.prev)
1483 XSRETURN_YES;
1484}
1485 3185
1486bool 3186bool
1487_destroy (SV *coro_sv) 3187_destroy (SV *coro_sv)
1488 CODE: 3188 CODE:
1489 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3189 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1490 OUTPUT: 3190 OUTPUT:
1491 RETVAL 3191 RETVAL
1492 3192
1493void 3193void
1494_exit (code) 3194_exit (int code)
1495 int code
1496 PROTOTYPE: $ 3195 PROTOTYPE: $
1497 CODE: 3196 CODE:
1498 _exit (code); 3197 _exit (code);
1499 3198
3199SV *
3200clone (Coro::State coro)
3201 CODE:
3202{
3203#if CORO_CLONE
3204 struct coro *ncoro = coro_clone (aTHX_ coro);
3205 MAGIC *mg;
3206 /* TODO: too much duplication */
3207 ncoro->hv = newHV ();
3208 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3209 mg->mg_flags |= MGf_DUP;
3210 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3211#else
3212 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3213#endif
3214}
3215 OUTPUT:
3216 RETVAL
3217
1500int 3218int
1501cctx_stacksize (int new_stacksize = 0) 3219cctx_stacksize (int new_stacksize = 0)
3220 PROTOTYPE: ;$
1502 CODE: 3221 CODE:
1503 RETVAL = coro_stacksize; 3222 RETVAL = cctx_stacksize;
1504 if (new_stacksize) 3223 if (new_stacksize)
3224 {
1505 coro_stacksize = new_stacksize; 3225 cctx_stacksize = new_stacksize;
3226 ++cctx_gen;
3227 }
1506 OUTPUT: 3228 OUTPUT:
1507 RETVAL 3229 RETVAL
1508 3230
1509int 3231int
3232cctx_max_idle (int max_idle = 0)
3233 PROTOTYPE: ;$
3234 CODE:
3235 RETVAL = cctx_max_idle;
3236 if (max_idle > 1)
3237 cctx_max_idle = max_idle;
3238 OUTPUT:
3239 RETVAL
3240
3241int
1510cctx_count () 3242cctx_count ()
3243 PROTOTYPE:
1511 CODE: 3244 CODE:
1512 RETVAL = cctx_count; 3245 RETVAL = cctx_count;
1513 OUTPUT: 3246 OUTPUT:
1514 RETVAL 3247 RETVAL
1515 3248
1516int 3249int
1517cctx_idle () 3250cctx_idle ()
3251 PROTOTYPE:
1518 CODE: 3252 CODE:
1519 RETVAL = cctx_idle; 3253 RETVAL = cctx_idle;
1520 OUTPUT: 3254 OUTPUT:
1521 RETVAL 3255 RETVAL
1522 3256
1523void 3257void
1524list () 3258list ()
3259 PROTOTYPE:
1525 PPCODE: 3260 PPCODE:
1526{ 3261{
1527 struct coro *coro; 3262 struct coro *coro;
1528 for (coro = coro_first; coro; coro = coro->next) 3263 for (coro = coro_first; coro; coro = coro->next)
1529 if (coro->hv) 3264 if (coro->hv)
… …
1534call (Coro::State coro, SV *coderef) 3269call (Coro::State coro, SV *coderef)
1535 ALIAS: 3270 ALIAS:
1536 eval = 1 3271 eval = 1
1537 CODE: 3272 CODE:
1538{ 3273{
1539 if (coro->mainstack) 3274 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1540 { 3275 {
1541 struct coro temp; 3276 struct coro *current = SvSTATE_current;
1542 Zero (&temp, 1, struct coro);
1543 3277
1544 if (!(coro->flags & CF_RUNNING)) 3278 if (current != coro)
1545 { 3279 {
3280 PUTBACK;
1546 save_perl (aTHX_ &temp); 3281 save_perl (aTHX_ current);
1547 load_perl (aTHX_ coro); 3282 load_perl (aTHX_ coro);
3283 SPAGAIN;
1548 } 3284 }
1549 3285
1550 { 3286 PUSHSTACK;
1551 dSP; 3287
1552 ENTER;
1553 SAVETMPS;
1554 PUSHMARK (SP); 3288 PUSHMARK (SP);
1555 PUTBACK; 3289 PUTBACK;
3290
1556 if (ix) 3291 if (ix)
1557 eval_sv (coderef, 0); 3292 eval_sv (coderef, 0);
1558 else 3293 else
1559 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3294 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3295
3296 POPSTACK;
1560 SPAGAIN; 3297 SPAGAIN;
1561 FREETMPS;
1562 LEAVE;
1563 PUTBACK;
1564 }
1565 3298
1566 if (!(coro->flags & CF_RUNNING)) 3299 if (current != coro)
1567 { 3300 {
3301 PUTBACK;
1568 save_perl (aTHX_ coro); 3302 save_perl (aTHX_ coro);
1569 load_perl (aTHX_ &temp); 3303 load_perl (aTHX_ current);
3304 SPAGAIN;
1570 } 3305 }
1571 } 3306 }
1572} 3307}
1573 3308
1574SV * 3309SV *
… …
1577 ALIAS: 3312 ALIAS:
1578 is_ready = CF_READY 3313 is_ready = CF_READY
1579 is_running = CF_RUNNING 3314 is_running = CF_RUNNING
1580 is_new = CF_NEW 3315 is_new = CF_NEW
1581 is_destroyed = CF_DESTROYED 3316 is_destroyed = CF_DESTROYED
3317 is_suspended = CF_SUSPENDED
1582 CODE: 3318 CODE:
1583 RETVAL = boolSV (coro->flags & ix); 3319 RETVAL = boolSV (coro->flags & ix);
1584 OUTPUT: 3320 OUTPUT:
1585 RETVAL 3321 RETVAL
1586 3322
1587void 3323void
3324throw (Coro::State self, SV *exception = &PL_sv_undef)
3325 PROTOTYPE: $;$
3326 CODE:
3327{
3328 struct coro *current = SvSTATE_current;
3329 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3330 SvREFCNT_dec (*exceptionp);
3331 SvGETMAGIC (exception);
3332 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3333}
3334
3335void
1588api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3336api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3337 PROTOTYPE: $;$
3338 C_ARGS: aTHX_ coro, flags
1589 3339
1590SV * 3340SV *
1591has_stack (Coro::State coro) 3341has_cctx (Coro::State coro)
1592 PROTOTYPE: $ 3342 PROTOTYPE: $
1593 CODE: 3343 CODE:
1594 RETVAL = boolSV (!!coro->cctx); 3344 /* maybe manage the running flag differently */
3345 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1595 OUTPUT: 3346 OUTPUT:
1596 RETVAL 3347 RETVAL
1597 3348
1598int 3349int
1599is_traced (Coro::State coro) 3350is_traced (Coro::State coro)
… …
1601 CODE: 3352 CODE:
1602 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3353 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1603 OUTPUT: 3354 OUTPUT:
1604 RETVAL 3355 RETVAL
1605 3356
1606IV 3357UV
1607rss (Coro::State coro) 3358rss (Coro::State coro)
1608 PROTOTYPE: $ 3359 PROTOTYPE: $
1609 ALIAS: 3360 ALIAS:
1610 usecount = 1 3361 usecount = 1
1611 CODE: 3362 CODE:
… …
1615 case 1: RETVAL = coro->usecount; break; 3366 case 1: RETVAL = coro->usecount; break;
1616 } 3367 }
1617 OUTPUT: 3368 OUTPUT:
1618 RETVAL 3369 RETVAL
1619 3370
3371void
3372force_cctx ()
3373 PROTOTYPE:
3374 CODE:
3375 cctx_current->idle_sp = 0;
3376
3377void
3378swap_defsv (Coro::State self)
3379 PROTOTYPE: $
3380 ALIAS:
3381 swap_defav = 1
3382 CODE:
3383 if (!self->slot)
3384 croak ("cannot swap state with coroutine that has no saved state,");
3385 else
3386 {
3387 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3388 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3389
3390 SV *tmp = *src; *src = *dst; *dst = tmp;
3391 }
3392
3393void
3394cancel (Coro::State self)
3395 CODE:
3396 coro_state_destroy (aTHX_ self);
3397 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3398
3399
3400SV *
3401enable_times (int enabled = enable_times)
3402 CODE:
3403{
3404 RETVAL = boolSV (enable_times);
3405
3406 if (enabled != enable_times)
3407 {
3408 enable_times = enabled;
3409
3410 coro_times_update ();
3411 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3412 }
3413}
3414 OUTPUT:
3415 RETVAL
3416
3417void
3418times (Coro::State self)
3419 PPCODE:
3420{
3421 struct coro *current = SvSTATE (coro_current);
3422
3423 if (expect_false (current == self))
3424 {
3425 coro_times_update ();
3426 coro_times_add (SvSTATE (coro_current));
3427 }
3428
3429 EXTEND (SP, 2);
3430 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3431 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3432
3433 if (expect_false (current == self))
3434 coro_times_sub (SvSTATE (coro_current));
3435}
3436
3437void
3438swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3439 CODE:
3440{
3441 struct coro *current = SvSTATE_current;
3442
3443 if (current == coro)
3444 SWAP_SVS (current);
3445
3446 if (!coro->swap_sv)
3447 coro->swap_sv = newAV ();
3448
3449 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3450 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3451
3452 if (current == coro)
3453 SWAP_SVS (current);
3454}
3455
1620 3456
1621MODULE = Coro::State PACKAGE = Coro 3457MODULE = Coro::State PACKAGE = Coro
1622 3458
1623BOOT: 3459BOOT:
1624{ 3460{
1625 int i;
1626
1627 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3461 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1628 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3462 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3463 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3464 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3465 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1629 av_async_pool = get_av ("Coro::async_pool", TRUE); 3466 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3467 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3468 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3469 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1630 3470
1631 coro_current = get_sv ("Coro::current", FALSE); 3471 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1632 SvREADONLY_on (coro_current); 3472 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1633 3473 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3474 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3475
1634 coro_stash = gv_stashpv ("Coro", TRUE); 3476 coro_stash = gv_stashpv ("Coro", TRUE);
1635 3477
1636 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3478 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1637 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3479 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1638 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3480 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1639 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3481 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1640 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3482 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1641 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3483 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1642
1643 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1644 coro_ready[i] = newAV ();
1645 3484
1646 { 3485 {
1647 SV *sv = perl_get_sv("Coro::API", 1); 3486 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1648 3487
1649 coroapi.schedule = api_schedule; 3488 coroapi.schedule = api_schedule;
3489 coroapi.schedule_to = api_schedule_to;
1650 coroapi.cede = api_cede; 3490 coroapi.cede = api_cede;
1651 coroapi.cede_notself = api_cede_notself; 3491 coroapi.cede_notself = api_cede_notself;
1652 coroapi.ready = api_ready; 3492 coroapi.ready = api_ready;
1653 coroapi.is_ready = api_is_ready; 3493 coroapi.is_ready = api_is_ready;
1654 coroapi.nready = &coro_nready; 3494 coroapi.nready = coro_nready;
1655 coroapi.current = coro_current; 3495 coroapi.current = coro_current;
1656 3496
1657 GCoroAPI = &coroapi; 3497 /*GCoroAPI = &coroapi;*/
1658 sv_setiv (sv, (IV)&coroapi); 3498 sv_setiv (sv, (IV)&coroapi);
1659 SvREADONLY_on (sv); 3499 SvREADONLY_on (sv);
1660 } 3500 }
1661} 3501}
3502
3503SV *
3504async (...)
3505 PROTOTYPE: &@
3506 CODE:
3507 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3508 api_ready (aTHX_ RETVAL);
3509 OUTPUT:
3510 RETVAL
3511
3512void
3513terminate (...)
3514 CODE:
3515 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3516
3517void
3518schedule (...)
3519 CODE:
3520 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3521
3522void
3523schedule_to (...)
3524 CODE:
3525 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3526
3527void
3528cede_to (...)
3529 CODE:
3530 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3531
3532void
3533cede (...)
3534 CODE:
3535 CORO_EXECUTE_SLF_XS (slf_init_cede);
3536
3537void
3538cede_notself (...)
3539 CODE:
3540 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1662 3541
1663void 3542void
1664_set_current (SV *current) 3543_set_current (SV *current)
1665 PROTOTYPE: $ 3544 PROTOTYPE: $
1666 CODE: 3545 CODE:
1667 SvREFCNT_dec (SvRV (coro_current)); 3546 SvREFCNT_dec (SvRV (coro_current));
1668 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3547 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3548
3549void
3550_set_readyhook (SV *hook)
3551 PROTOTYPE: $
3552 CODE:
3553 SvREFCNT_dec (coro_readyhook);
3554 SvGETMAGIC (hook);
3555 if (SvOK (hook))
3556 {
3557 coro_readyhook = newSVsv (hook);
3558 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3559 }
3560 else
3561 {
3562 coro_readyhook = 0;
3563 CORO_READYHOOK = 0;
3564 }
1669 3565
1670int 3566int
1671prio (Coro::State coro, int newprio = 0) 3567prio (Coro::State coro, int newprio = 0)
3568 PROTOTYPE: $;$
1672 ALIAS: 3569 ALIAS:
1673 nice = 1 3570 nice = 1
1674 CODE: 3571 CODE:
1675{ 3572{
1676 RETVAL = coro->prio; 3573 RETVAL = coro->prio;
… …
1678 if (items > 1) 3575 if (items > 1)
1679 { 3576 {
1680 if (ix) 3577 if (ix)
1681 newprio = coro->prio - newprio; 3578 newprio = coro->prio - newprio;
1682 3579
1683 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3580 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1684 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3581 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1685 3582
1686 coro->prio = newprio; 3583 coro->prio = newprio;
1687 } 3584 }
1688} 3585}
1689 OUTPUT: 3586 OUTPUT:
… …
1691 3588
1692SV * 3589SV *
1693ready (SV *self) 3590ready (SV *self)
1694 PROTOTYPE: $ 3591 PROTOTYPE: $
1695 CODE: 3592 CODE:
1696 RETVAL = boolSV (api_ready (self)); 3593 RETVAL = boolSV (api_ready (aTHX_ self));
1697 OUTPUT: 3594 OUTPUT:
1698 RETVAL 3595 RETVAL
1699 3596
1700int 3597int
1701nready (...) 3598nready (...)
… …
1703 CODE: 3600 CODE:
1704 RETVAL = coro_nready; 3601 RETVAL = coro_nready;
1705 OUTPUT: 3602 OUTPUT:
1706 RETVAL 3603 RETVAL
1707 3604
1708# for async_pool speedup
1709void 3605void
1710_pool_1 (SV *cb) 3606suspend (Coro::State self)
3607 PROTOTYPE: $
1711 CODE: 3608 CODE:
1712{ 3609 self->flags |= CF_SUSPENDED;
1713 struct coro *coro = SvSTATE (coro_current);
1714 HV *hv = (HV *)SvRV (coro_current);
1715 AV *defav = GvAV (PL_defgv);
1716 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1717 AV *invoke_av;
1718 int i, len;
1719 3610
1720 if (!invoke) 3611void
1721 croak ("\3terminate\2\n"); 3612resume (Coro::State self)
3613 PROTOTYPE: $
3614 CODE:
3615 self->flags &= ~CF_SUSPENDED;
1722 3616
1723 SvREFCNT_dec (coro->saved_deffh); 3617void
1724 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3618_pool_handler (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1725 3621
1726 hv_store (hv, "desc", sizeof ("desc") - 1, 3622void
1727 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3623async_pool (SV *cv, ...)
3624 PROTOTYPE: &@
3625 PPCODE:
3626{
3627 HV *hv = (HV *)av_pop (av_async_pool);
3628 AV *av = newAV ();
3629 SV *cb = ST (0);
3630 int i;
1728 3631
1729 invoke_av = (AV *)SvRV (invoke); 3632 av_extend (av, items - 2);
1730 len = av_len (invoke_av); 3633 for (i = 1; i < items; ++i)
3634 av_push (av, SvREFCNT_inc_NN (ST (i)));
1731 3635
1732 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3636 if ((SV *)hv == &PL_sv_undef)
1733
1734 if (len > 0)
1735 { 3637 {
1736 av_fill (defav, len - 1); 3638 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1737 for (i = 0; i < len; ++i) 3639 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1738 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3640 SvREFCNT_dec (sv);
1739 } 3641 }
1740 3642
3643 {
3644 struct coro *coro = SvSTATE_hv (hv);
3645
3646 assert (!coro->invoke_cb);
3647 assert (!coro->invoke_av);
3648 coro->invoke_cb = SvREFCNT_inc (cb);
3649 coro->invoke_av = av;
3650 }
3651
3652 api_ready (aTHX_ (SV *)hv);
3653
3654 if (GIMME_V != G_VOID)
3655 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3656 else
1741 SvREFCNT_dec (invoke); 3657 SvREFCNT_dec (hv);
1742} 3658}
1743 3659
1744void 3660SV *
1745_pool_2 (SV *cb) 3661rouse_cb ()
3662 PROTOTYPE:
1746 CODE: 3663 CODE:
1747{ 3664 RETVAL = coro_new_rouse_cb (aTHX);
1748 struct coro *coro = SvSTATE (coro_current);
1749
1750 sv_setsv (cb, &PL_sv_undef);
1751
1752 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1753 coro->saved_deffh = 0;
1754
1755 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1756 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1757 croak ("\3terminate\2\n");
1758
1759 av_clear (GvAV (PL_defgv));
1760 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1761 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1762
1763 coro->prio = 0;
1764
1765 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1766 api_trace (coro_current, 0);
1767
1768 av_push (av_async_pool, newSVsv (coro_current));
1769}
1770
1771
1772MODULE = Coro::State PACKAGE = Coro::AIO
1773
1774SV *
1775_get_state ()
1776 CODE:
1777{
1778 struct io_state *data;
1779
1780 RETVAL = newSV (sizeof (struct io_state));
1781 data = (struct io_state *)SvPVX (RETVAL);
1782 SvCUR_set (RETVAL, sizeof (struct io_state));
1783 SvPOK_only (RETVAL);
1784
1785 data->errorno = errno;
1786 data->laststype = PL_laststype;
1787 data->laststatval = PL_laststatval;
1788 data->statcache = PL_statcache;
1789}
1790 OUTPUT: 3665 OUTPUT:
1791 RETVAL 3666 RETVAL
1792 3667
1793void 3668void
1794_set_state (char *data_) 3669rouse_wait (...)
3670 PROTOTYPE: ;$
3671 PPCODE:
3672 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3673
3674void
3675on_enter (SV *block)
3676 ALIAS:
3677 on_leave = 1
1795 PROTOTYPE: $ 3678 PROTOTYPE: &
1796 CODE: 3679 CODE:
1797{ 3680{
1798 struct io_state *data = (void *)data_; 3681 struct coro *coro = SvSTATE_current;
3682 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1799 3683
1800 errno = data->errorno; 3684 block = s_get_cv_croak (block);
1801 PL_laststype = data->laststype;
1802 PL_laststatval = data->laststatval;
1803 PL_statcache = data->statcache;
1804}
1805 3685
3686 if (!*avp)
3687 *avp = newAV ();
3688
3689 av_push (*avp, SvREFCNT_inc (block));
3690
3691 if (!ix)
3692 on_enterleave_call (aTHX_ block);
3693
3694 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3695 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3696 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3697}
3698
3699
3700MODULE = Coro::State PACKAGE = PerlIO::cede
3701
3702BOOT:
3703 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3704
3705
3706MODULE = Coro::State PACKAGE = Coro::Semaphore
3707
3708SV *
3709new (SV *klass, SV *count = 0)
3710 CODE:
3711{
3712 int semcnt = 1;
3713
3714 if (count)
3715 {
3716 SvGETMAGIC (count);
3717
3718 if (SvOK (count))
3719 semcnt = SvIV (count);
3720 }
3721
3722 RETVAL = sv_bless (
3723 coro_waitarray_new (aTHX_ semcnt),
3724 GvSTASH (CvGV (cv))
3725 );
3726}
3727 OUTPUT:
3728 RETVAL
3729
3730# helper for Coro::Channel and others
3731SV *
3732_alloc (int count)
3733 CODE:
3734 RETVAL = coro_waitarray_new (aTHX_ count);
3735 OUTPUT:
3736 RETVAL
3737
3738SV *
3739count (SV *self)
3740 CODE:
3741 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3742 OUTPUT:
3743 RETVAL
3744
3745void
3746up (SV *self, int adjust = 1)
3747 ALIAS:
3748 adjust = 1
3749 CODE:
3750 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3751
3752void
3753down (...)
3754 CODE:
3755 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3756
3757void
3758wait (...)
3759 CODE:
3760 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3761
3762void
3763try (SV *self)
3764 PPCODE:
3765{
3766 AV *av = (AV *)SvRV (self);
3767 SV *count_sv = AvARRAY (av)[0];
3768 IV count = SvIVX (count_sv);
3769
3770 if (count > 0)
3771 {
3772 --count;
3773 SvIVX (count_sv) = count;
3774 XSRETURN_YES;
3775 }
3776 else
3777 XSRETURN_NO;
3778}
3779
3780void
3781waiters (SV *self)
3782 PPCODE:
3783{
3784 AV *av = (AV *)SvRV (self);
3785 int wcount = AvFILLp (av) + 1 - 1;
3786
3787 if (GIMME_V == G_SCALAR)
3788 XPUSHs (sv_2mortal (newSViv (wcount)));
3789 else
3790 {
3791 int i;
3792 EXTEND (SP, wcount);
3793 for (i = 1; i <= wcount; ++i)
3794 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3795 }
3796}
3797
3798MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3799
3800void
3801_may_delete (SV *sem, int count, int extra_refs)
3802 PPCODE:
3803{
3804 AV *av = (AV *)SvRV (sem);
3805
3806 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3807 && AvFILLp (av) == 0 /* no waiters, just count */
3808 && SvIV (AvARRAY (av)[0]) == count)
3809 XSRETURN_YES;
3810
3811 XSRETURN_NO;
3812}
3813
3814MODULE = Coro::State PACKAGE = Coro::Signal
3815
3816SV *
3817new (SV *klass)
3818 CODE:
3819 RETVAL = sv_bless (
3820 coro_waitarray_new (aTHX_ 0),
3821 GvSTASH (CvGV (cv))
3822 );
3823 OUTPUT:
3824 RETVAL
3825
3826void
3827wait (...)
3828 CODE:
3829 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3830
3831void
3832broadcast (SV *self)
3833 CODE:
3834{
3835 AV *av = (AV *)SvRV (self);
3836 coro_signal_wake (aTHX_ av, AvFILLp (av));
3837}
3838
3839void
3840send (SV *self)
3841 CODE:
3842{
3843 AV *av = (AV *)SvRV (self);
3844
3845 if (AvFILLp (av))
3846 coro_signal_wake (aTHX_ av, 1);
3847 else
3848 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3849}
3850
3851IV
3852awaited (SV *self)
3853 CODE:
3854 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3855 OUTPUT:
3856 RETVAL
3857
3858
3859MODULE = Coro::State PACKAGE = Coro::AnyEvent
3860
3861BOOT:
3862 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3863
3864void
3865_schedule (...)
3866 CODE:
3867{
3868 static int incede;
3869
3870 api_cede_notself (aTHX);
3871
3872 ++incede;
3873 while (coro_nready >= incede && api_cede (aTHX))
3874 ;
3875
3876 sv_setsv (sv_activity, &PL_sv_undef);
3877 if (coro_nready >= incede)
3878 {
3879 PUSHMARK (SP);
3880 PUTBACK;
3881 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3882 }
3883
3884 --incede;
3885}
3886
3887
3888MODULE = Coro::State PACKAGE = Coro::AIO
3889
3890void
3891_register (char *target, char *proto, SV *req)
3892 CODE:
3893{
3894 SV *req_cv = s_get_cv_croak (req);
3895 /* newXSproto doesn't return the CV on 5.8 */
3896 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3897 sv_setpv ((SV *)slf_cv, proto);
3898 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3899}
3900
3901MODULE = Coro::State PACKAGE = Coro::Select
3902
3903void
3904patch_pp_sselect ()
3905 CODE:
3906 if (!coro_old_pp_sselect)
3907 {
3908 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3909 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3910 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3911 }
3912
3913void
3914unpatch_pp_sselect ()
3915 CODE:
3916 if (coro_old_pp_sselect)
3917 {
3918 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3919 coro_old_pp_sselect = 0;
3920 }
3921

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