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Comparing Coro/Coro/State.xs (file contents):
Revision 1.140 by root, Sat Jan 20 19:52:15 2007 UTC vs.
Revision 1.414 by root, Wed Jun 29 16:08:31 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"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
8 18
19#include <stddef.h>
9#include <stdio.h> 20#include <stdio.h>
10#include <errno.h> 21#include <errno.h>
11#include <assert.h> 22#include <assert.h>
12 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
37
13#ifdef HAVE_MMAP 38#if HAVE_MMAP
14# include <unistd.h> 39# include <unistd.h>
15# include <sys/mman.h> 40# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON 42# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
31#else 56#else
32# define PAGESIZE 0 57# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
34#endif 59#endif
35 60
36#if USE_VALGRIND 61#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
38#endif 63#endif
39 64
40/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
42 67
43#define PERL_VERSION_ATLEAST(a,b,c) \ 68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
44 (PERL_REVISION > (a) \ 69# define HAS_SCOPESTACK_NAME 1
45 || (PERL_REVISION == (a) \ 70#endif
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48 71
49#if !PERL_VERSION_ATLEAST (5,6,0) 72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50# ifndef PL_ppaddr 73# undef CORO_STACKGUARD
51# define PL_ppaddr ppaddr 74#endif
75
76#ifndef CORO_STACKGUARD
77# define CORO_STACKGUARD 0
78#endif
79
80/* prefer perl internal functions over our own? */
81#ifndef CORO_PREFER_PERL_FUNCTIONS
82# define CORO_PREFER_PERL_FUNCTIONS 0
83#endif
84
85/* The next macros try to return the current stack pointer, in an as
86 * portable way as possible. */
87#if __GNUC__ >= 4
88# define dSTACKLEVEL int stacklevel_dummy
89# define STACKLEVEL __builtin_frame_address (0)
90#else
91# define dSTACKLEVEL volatile void *stacklevel
92# define STACKLEVEL ((void *)&stacklevel)
93#endif
94
95#define IN_DESTRUCT PL_dirty
96
97#include "CoroAPI.h"
98#define GCoroAPI (&coroapi) /* very sneaky */
99
100#ifdef USE_ITHREADS
101# if CORO_PTHREAD
102static void *coro_thx;
52# endif 103# endif
53# ifndef call_sv 104#endif
54# define call_sv perl_call_sv 105
106/* used in state.h */
107#define VAR(name,type) VARx(name, PL_ ## name, type)
108
109#ifdef __linux
110# include <time.h> /* for timespec */
111# include <syscall.h> /* for SYS_* */
112# ifdef SYS_clock_gettime
113# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
114# define CORO_CLOCK_MONOTONIC 1
115# define CORO_CLOCK_THREAD_CPUTIME_ID 3
55# endif 116# endif
56# ifndef get_sv
57# define get_sv perl_get_sv
58# endif 117#endif
59# ifndef get_cv
60# define get_cv perl_get_cv
61# endif
62# ifndef IS_PADGV
63# define IS_PADGV(v) 0
64# endif
65# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0
67# endif
68#endif
69 118
70/* 5.8.7 */ 119static double (*nvtime)(); /* so why doesn't it take void? */
71#ifndef SvRV_set 120static void (*u2time)(pTHX_ UV ret[2]);
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
74 121
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 122/* we hijack an hopefully unused CV flag for our purposes */
76# undef STACKGUARD 123#define CVf_SLF 0x4000
77#endif 124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
78 126
79#ifndef STACKGUARD 127static U32 cctx_gen;
80# define STACKGUARD 0 128static size_t cctx_stacksize = CORO_STACKSIZE;
81#endif
82
83/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0
86#endif
87
88/* The next macro should declare a variable stacklevel that contains and approximation
89 * to the current C stack pointer. Its property is that it changes with each call
90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
92#define STACKLEVEL ((void *)&stacklevel)
93
94#define IN_DESTRUCT (PL_main_cv == Nullcv)
95
96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory")
99#else
100# define attribute(x)
101# define BARRIER
102#endif
103
104#define NOINLINE attribute ((noinline))
105
106#include "CoroAPI.h"
107
108#ifdef USE_ITHREADS
109static perl_mutex coro_mutex;
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif
116
117/* helper storage struct for Coro::AIO */
118struct io_state
119{
120 int errorno;
121 I32 laststype;
122 int laststatval;
123 Stat_t statcache;
124};
125
126static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
127static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
131static JMPENV *main_top_env;
128static HV *coro_state_stash, *coro_stash; 132static HV *coro_state_stash, *coro_stash;
129static SV *coro_mortal; /* will be freed after next transfer */ 133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
134
135static AV *av_destroy; /* destruction queue */
136static SV *sv_manager; /* the manager coro */
137static SV *sv_idle; /* $Coro::idle */
138
139static GV *irsgv; /* $/ */
140static GV *stdoutgv; /* *STDOUT */
141static SV *rv_diehook;
142static SV *rv_warnhook;
143static HV *hv_sig; /* %SIG */
144
145/* async_pool helper stuff */
146static SV *sv_pool_rss;
147static SV *sv_pool_size;
148static SV *sv_async_pool_idle; /* description string */
149static AV *av_async_pool; /* idle pool */
150static SV *sv_Coro; /* class string */
151static CV *cv_pool_handler;
152
153/* Coro::AnyEvent */
154static SV *sv_activity;
155
156/* enable processtime/realtime profiling */
157static char enable_times;
158typedef U32 coro_ts[2];
159static coro_ts time_real, time_cpu;
160static char times_valid;
130 161
131static struct coro_cctx *cctx_first; 162static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 163static int cctx_count, cctx_idle;
133 164
165enum
166{
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
134/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
135typedef struct coro_cctx { 176typedef struct coro_cctx
177{
136 struct coro_cctx *next; 178 struct coro_cctx *next;
137 179
138 /* the stack */ 180 /* the stack */
139 void *sptr; 181 void *sptr;
140 long ssize; /* positive == mmap, otherwise malloc */ 182 size_t ssize;
141 183
142 /* cpu state */ 184 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env; 187 JMPENV *top_env;
146 coro_context cctx; 188 coro_context cctx;
147 189
148 int inuse; 190 U32 gen;
149
150#if USE_VALGRIND 191#if CORO_USE_VALGRIND
151 int valgrind_id; 192 int valgrind_id;
152#endif 193#endif
194 unsigned char flags;
153} coro_cctx; 195} coro_cctx;
154 196
197static coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201static MGVTBL coro_state_vtbl;
202
155enum { 203enum
204{
156 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 208 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
160}; 211};
161 212
213/* the structure where most of the perl state is stored, overlaid on the cxstack */
214typedef struct
215{
216#define VARx(name,expr,type) type name;
217# include "state.h"
218#undef VARx
219} perl_slots;
220
221/* how many context stack entries do we need for perl_slots */
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
223
162/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
163struct coro { 225struct coro
226{
164 /* the c coroutine allocated to this perl coroutine, if any */ 227 /* the C coroutine allocated to this perl coroutine, if any */
165 coro_cctx *cctx; 228 coro_cctx *cctx;
166 229
230 /* ready queue */
231 struct coro *next_ready;
232
233 /* state data */
234 struct CoroSLF slf_frame; /* saved slf frame */
235 AV *mainstack;
236 perl_slots *slot; /* basically the saved sp */
237
238 CV *startcv; /* the CV to execute */
167 /* data associated with this coroutine (initial args) */ 239 AV *args; /* data associated with this coroutine (initial args) */
168 AV *args;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */ 240 int flags; /* CF_ flags */
241 HV *hv; /* the perl hash associated with this coro, if any */
172 242
173 /* optionally saved, might be zero */ 243 /* statistics */
174 AV *defav; /* @_ */ 244 int usecount; /* number of transfers to this coro */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name;
181# include "state.h"
182#undef VAR
183 245
184 /* coro process data */ 246 /* coro process data */
185 int prio; 247 int prio;
248 SV *except; /* exception to be thrown */
249 SV *rouse_cb; /* last rouse callback */
250 AV *on_destroy; /* callbacks or coros to notify on destroy */
251 AV *status; /* the exit status list */
252
253 /* async_pool */
254 SV *saved_deffh;
255 SV *invoke_cb;
256 AV *invoke_av;
257
258 /* on_enter/on_leave */
259 AV *on_enter;
260 AV *on_leave;
261
262 /* swap_sv */
263 AV *swap_sv;
264
265 /* times */
266 coro_ts t_cpu, t_real;
267
268 /* linked list */
269 struct coro *next, *prev;
186}; 270};
187 271
188typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
189typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
190 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the main reason we don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
191/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
192 281
193#define PRIO_MAX 3 282#define CORO_PRIO_MAX 3
194#define PRIO_HIGH 1 283#define CORO_PRIO_HIGH 1
195#define PRIO_NORMAL 0 284#define CORO_PRIO_NORMAL 0
196#define PRIO_LOW -1 285#define CORO_PRIO_LOW -1
197#define PRIO_IDLE -3 286#define CORO_PRIO_IDLE -3
198#define PRIO_MIN -4 287#define CORO_PRIO_MIN -4
199 288
200/* for Coro.pm */ 289/* for Coro.pm */
201static SV *coro_current; 290static SV *coro_current;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static SV *coro_readyhook;
203static int coro_nready; 292static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
293static CV *cv_coro_run;
294static struct coro *coro_first;
295#define coro_nready coroapi.nready
296
297/** JIT *********************************************************************/
298
299#if CORO_JIT
300 /* APPLE doesn't have HAVE_MMAP though */
301 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
302 #ifndef CORO_JIT_TYPE
303 #if __x86_64 && CORO_JIT_UNIXY
304 #define CORO_JIT_TYPE "amd64-unix"
305 #elif __i386 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "x86-unix"
307 #endif
308 #endif
309#endif
310
311#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
312 #undef CORO_JIT
313#endif
314
315#if CORO_JIT
316 typedef void (*load_save_perl_slots_type)(perl_slots *);
317 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
318#endif
319
320/** Coro::Select ************************************************************/
321
322static OP *(*coro_old_pp_sselect) (pTHX);
323static SV *coro_select_select;
324
325/* horrible hack, but if it works... */
326static OP *
327coro_pp_sselect (pTHX)
328{
329 dSP;
330 PUSHMARK (SP - 4); /* fake argument list */
331 XPUSHs (coro_select_select);
332 PUTBACK;
333
334 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
335 PL_op->op_flags |= OPf_STACKED;
336 PL_op->op_private = 0;
337 return PL_ppaddr [OP_ENTERSUB](aTHX);
338}
339
340/** time stuff **************************************************************/
341
342#ifdef HAS_GETTIMEOFDAY
343
344ecb_inline void
345coro_u2time (pTHX_ UV ret[2])
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 ret [0] = tv.tv_sec;
351 ret [1] = tv.tv_usec;
352}
353
354ecb_inline double
355coro_nvtime (void)
356{
357 struct timeval tv;
358 gettimeofday (&tv, 0);
359
360 return tv.tv_sec + tv.tv_usec * 1e-6;
361}
362
363ecb_inline void
364time_init (pTHX)
365{
366 nvtime = coro_nvtime;
367 u2time = coro_u2time;
368}
369
370#else
371
372ecb_inline void
373time_init (pTHX)
374{
375 SV **svp;
376
377 require_pv ("Time/HiRes.pm");
378
379 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
380
381 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
382 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
383
384 nvtime = INT2PTR (double (*)(), SvIV (*svp));
385
386 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
387 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
388}
389
390#endif
204 391
205/** lowlevel stuff **********************************************************/ 392/** lowlevel stuff **********************************************************/
206 393
207static AV * 394static SV * ecb_noinline
395coro_get_sv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_sv (name, create);
400#endif
401 return get_sv (name, create);
402}
403
404static AV * ecb_noinline
405coro_get_av (pTHX_ const char *name, int create)
406{
407#if PERL_VERSION_ATLEAST (5,10,0)
408 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
409 get_av (name, create);
410#endif
411 return get_av (name, create);
412}
413
414static HV * ecb_noinline
415coro_get_hv (pTHX_ const char *name, int create)
416{
417#if PERL_VERSION_ATLEAST (5,10,0)
418 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
419 get_hv (name, create);
420#endif
421 return get_hv (name, create);
422}
423
424ecb_inline void
425coro_times_update (void)
426{
427#ifdef coro_clock_gettime
428 struct timespec ts;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
432 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
433
434 ts.tv_sec = ts.tv_nsec = 0;
435 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
436 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
437#else
438 dTHX;
439 UV tv[2];
440
441 u2time (aTHX_ tv);
442 time_real [0] = tv [0];
443 time_real [1] = tv [1] * 1000;
444#endif
445}
446
447ecb_inline void
448coro_times_add (struct coro *c)
449{
450 c->t_real [1] += time_real [1];
451 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
452 c->t_real [0] += time_real [0];
453
454 c->t_cpu [1] += time_cpu [1];
455 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
456 c->t_cpu [0] += time_cpu [0];
457}
458
459ecb_inline void
460coro_times_sub (struct coro *c)
461{
462 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
463 c->t_real [1] -= time_real [1];
464 c->t_real [0] -= time_real [0];
465
466 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
467 c->t_cpu [1] -= time_cpu [1];
468 c->t_cpu [0] -= time_cpu [0];
469}
470
471/*****************************************************************************/
472/* magic glue */
473
474#define CORO_MAGIC_type_cv 26
475#define CORO_MAGIC_type_state PERL_MAGIC_ext
476
477#define CORO_MAGIC_NN(sv, type) \
478 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
479 ? SvMAGIC (sv) \
480 : mg_find (sv, type))
481
482#define CORO_MAGIC(sv, type) \
483 (ecb_expect_true (SvMAGIC (sv)) \
484 ? CORO_MAGIC_NN (sv, type) \
485 : 0)
486
487#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
488#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
489
490ecb_inline MAGIC *
491SvSTATEhv_p (pTHX_ SV *coro)
492{
493 MAGIC *mg;
494
495 if (ecb_expect_true (
496 SvTYPE (coro) == SVt_PVHV
497 && (mg = CORO_MAGIC_state (coro))
498 && mg->mg_virtual == &coro_state_vtbl
499 ))
500 return mg;
501
502 return 0;
503}
504
505ecb_inline struct coro *
506SvSTATE_ (pTHX_ SV *coro)
507{
508 MAGIC *mg;
509
510 if (SvROK (coro))
511 coro = SvRV (coro);
512
513 mg = SvSTATEhv_p (aTHX_ coro);
514 if (!mg)
515 croak ("Coro::State object required");
516
517 return (struct coro *)mg->mg_ptr;
518}
519
520#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
521
522/* faster than SvSTATE, but expects a coroutine hv */
523#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
524#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
525
526/*****************************************************************************/
527/* padlist management and caching */
528
529ecb_inline AV *
208coro_clone_padlist (CV *cv) 530coro_derive_padlist (pTHX_ CV *cv)
209{ 531{
210 AV *padlist = CvPADLIST (cv); 532 AV *padlist = CvPADLIST (cv);
211 AV *newpadlist, *newpad; 533 AV *newpadlist, *newpad;
212 534
213 newpadlist = newAV (); 535 newpadlist = newAV ();
214 AvREAL_off (newpadlist); 536 AvREAL_off (newpadlist);
215#if PERL_VERSION_ATLEAST (5,9,0) 537#if PERL_VERSION_ATLEAST (5,10,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else 539#else
218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif 541#endif
220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 542 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
221 --AvFILLp (padlist); 543 --AvFILLp (padlist);
222 544
223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 545 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
224 av_store (newpadlist, 1, (SV *)newpad); 546 av_store (newpadlist, 1, (SV *)newpad);
225 547
226 return newpadlist; 548 return newpadlist;
227} 549}
228 550
229static void 551ecb_inline void
230free_padlist (AV *padlist) 552free_padlist (pTHX_ AV *padlist)
231{ 553{
232 /* may be during global destruction */ 554 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 555 if (!IN_DESTRUCT)
234 { 556 {
235 I32 i = AvFILLp (padlist); 557 I32 i = AvFILLp (padlist);
236 while (i >= 0) 558
559 while (i > 0) /* special-case index 0 */
237 { 560 {
238 SV **svp = av_fetch (padlist, i--, FALSE); 561 /* we try to be extra-careful here */
239 if (svp) 562 AV *av = (AV *)AvARRAY (padlist)[i--];
240 { 563 I32 j = AvFILLp (av);
241 SV *sv; 564
242 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 565 while (j >= 0)
566 SvREFCNT_dec (AvARRAY (av)[j--]);
567
568 AvFILLp (av) = -1;
243 SvREFCNT_dec (sv); 569 SvREFCNT_dec (av);
244
245 SvREFCNT_dec (*svp);
246 }
247 } 570 }
248 571
572 SvREFCNT_dec (AvARRAY (padlist)[0]);
573
574 AvFILLp (padlist) = -1;
249 SvREFCNT_dec ((SV*)padlist); 575 SvREFCNT_dec ((SV*)padlist);
250 } 576 }
251} 577}
252 578
253static int 579static int
254coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 580coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255{ 581{
256 AV *padlist; 582 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 583 AV *av = (AV *)mg->mg_obj;
258 584
585 /* perl manages to free our internal AV and _then_ call us */
586 if (IN_DESTRUCT)
587 return 0;
588
259 /* casting is fun. */ 589 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 590 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 591 free_padlist (aTHX_ padlist);
262 592
263 SvREFCNT_dec (av); 593 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
264 594
265 return 0; 595 return 0;
266} 596}
267 597
268#define PERL_MAGIC_coro PERL_MAGIC_ext 598static MGVTBL coro_cv_vtbl = {
269 599 0, 0, 0, 0,
270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 600 coro_cv_free
271 601};
272#define CORO_MAGIC(cv) \
273 SvMAGIC (cv) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
275 ? SvMAGIC (cv) \
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
277 : 0
278 602
279/* the next two functions merely cache the padlists */ 603/* the next two functions merely cache the padlists */
280static void 604ecb_inline void
281get_padlist (CV *cv) 605get_padlist (pTHX_ CV *cv)
282{ 606{
283 MAGIC *mg = CORO_MAGIC (cv); 607 MAGIC *mg = CORO_MAGIC_cv (cv);
284 AV *av; 608 AV *av;
285 609
286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 610 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 611 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288 else 612 else
289 { 613 {
290#if PREFER_PERL_FUNCTIONS 614#if CORO_PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */ 615 /* this is probably cleaner? but also slower! */
616 /* in practise, it seems to be less stable */
292 CV *cp = Perl_cv_clone (cv); 617 CV *cp = Perl_cv_clone (aTHX_ cv);
293 CvPADLIST (cv) = CvPADLIST (cp); 618 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0; 619 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp); 620 SvREFCNT_dec (cp);
296#else 621#else
297 CvPADLIST (cv) = coro_clone_padlist (cv); 622 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
298#endif 623#endif
299 } 624 }
300} 625}
301 626
302static void 627ecb_inline void
303put_padlist (CV *cv) 628put_padlist (pTHX_ CV *cv)
304{ 629{
305 MAGIC *mg = CORO_MAGIC (cv); 630 MAGIC *mg = CORO_MAGIC_cv (cv);
306 AV *av; 631 AV *av;
307 632
308 if (!mg) 633 if (ecb_expect_false (!mg))
309 { 634 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312 mg->mg_virtual = &vtbl_coro;
313 mg->mg_obj = (SV *)newAV ();
314 }
315 635
316 av = (AV *)mg->mg_obj; 636 av = (AV *)mg->mg_obj;
317 637
318 if (AvFILLp (av) >= AvMAX (av)) 638 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
319 av_extend (av, AvMAX (av) + 1); 639 av_extend (av, AvFILLp (av) + 1);
320 640
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 641 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322} 642}
323 643
324/** load & save, init *******************************************************/ 644/** load & save, init *******************************************************/
325 645
326#define SB do { 646/* swap sv heads, at least logically */
327#define SE } while (0)
328
329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330
331static void 647static void
648swap_svs (pTHX_ Coro__State c)
649{
650 int i;
651
652 for (i = 0; i <= AvFILLp (c->swap_sv); )
653 {
654 SV *a = AvARRAY (c->swap_sv)[i++];
655 SV *b = AvARRAY (c->swap_sv)[i++];
656
657 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
658 SV tmp;
659
660 /* swap sv_any */
661 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
662
663 /* swap sv_flags */
664 SvFLAGS (&tmp) = SvFLAGS (a);
665 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
666 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
667
668#if PERL_VERSION_ATLEAST (5,10,0)
669 /* perl 5.10 complicates this _quite_ a bit, but it also is
670 * much faster, so no quarrels here. alternatively, we could
671 * sv_upgrade to avoid this.
672 */
673 {
674 /* swap sv_u */
675 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
676
677 /* if SvANY points to the head, we need to adjust the pointers,
678 * as the pointer for a still points to b, and maybe vice versa.
679 */
680 #define svany_in_head(type) \
681 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
682
683 if (svany_in_head (SvTYPE (a)))
684 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
685
686 if (svany_in_head (SvTYPE (b)))
687 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
688 }
689#endif
690 }
691}
692
693#define SWAP_SVS(coro) \
694 if (ecb_expect_false ((coro)->swap_sv)) \
695 swap_svs (aTHX_ (coro))
696
697static void
698on_enterleave_call (pTHX_ SV *cb);
699
700static void
332load_perl (Coro__State c) 701load_perl (pTHX_ Coro__State c)
333{ 702{
334#define VAR(name,type) PL_ ## name = c->name; 703 perl_slots *slot = c->slot;
704 c->slot = 0;
705
706 PL_mainstack = c->mainstack;
707
708#if CORO_JIT
709 load_perl_slots (slot);
710#else
711 #define VARx(name,expr,type) expr = slot->name;
335# include "state.h" 712 # include "state.h"
336#undef VAR 713 #undef VARx
337 714#endif
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
352 715
353 { 716 {
354 dSP; 717 dSP;
718
355 CV *cv; 719 CV *cv;
356 720
357 /* now do the ugly restore mess */ 721 /* now do the ugly restore mess */
358 while ((cv = (CV *)POPs)) 722 while (ecb_expect_true (cv = (CV *)POPs))
359 { 723 {
360 put_padlist (cv); /* mark this padlist as available */ 724 put_padlist (aTHX_ cv); /* mark this padlist as available */
361 CvDEPTH (cv) = PTR2IV (POPs); 725 CvDEPTH (cv) = PTR2IV (POPs);
362 CvPADLIST (cv) = (AV *)POPs; 726 CvPADLIST (cv) = (AV *)POPs;
363 } 727 }
364 728
365 PUTBACK; 729 PUTBACK;
366 } 730 }
367}
368 731
732 slf_frame = c->slf_frame;
733 CORO_THROW = c->except;
734
735 if (ecb_expect_false (enable_times))
736 {
737 if (ecb_expect_false (!times_valid))
738 coro_times_update ();
739
740 coro_times_sub (c);
741 }
742
743 if (ecb_expect_false (c->on_enter))
744 {
745 int i;
746
747 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
748 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
749 }
750
751 SWAP_SVS (c);
752}
753
369static void 754static void
370save_perl (Coro__State c) 755save_perl (pTHX_ Coro__State c)
371{ 756{
757 SWAP_SVS (c);
758
759 if (ecb_expect_false (c->on_leave))
760 {
761 int i;
762
763 for (i = AvFILLp (c->on_leave); i >= 0; --i)
764 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
765 }
766
767 times_valid = 0;
768
769 if (ecb_expect_false (enable_times))
770 {
771 coro_times_update (); times_valid = 1;
772 coro_times_add (c);
773 }
774
775 c->except = CORO_THROW;
776 c->slf_frame = slf_frame;
777
372 { 778 {
373 dSP; 779 dSP;
374 I32 cxix = cxstack_ix; 780 I32 cxix = cxstack_ix;
375 PERL_CONTEXT *ccstk = cxstack; 781 PERL_CONTEXT *ccstk = cxstack;
376 PERL_SI *top_si = PL_curstackinfo; 782 PERL_SI *top_si = PL_curstackinfo;
… …
378 /* 784 /*
379 * the worst thing you can imagine happens first - we have to save 785 * the worst thing you can imagine happens first - we have to save
380 * (and reinitialize) all cv's in the whole callchain :( 786 * (and reinitialize) all cv's in the whole callchain :(
381 */ 787 */
382 788
383 EXTEND (SP, 3 + 1);
384 PUSHs (Nullsv); 789 XPUSHs (Nullsv);
385 /* this loop was inspired by pp_caller */ 790 /* this loop was inspired by pp_caller */
386 for (;;) 791 for (;;)
387 { 792 {
388 while (cxix >= 0) 793 while (ecb_expect_true (cxix >= 0))
389 { 794 {
390 PERL_CONTEXT *cx = &ccstk[cxix--]; 795 PERL_CONTEXT *cx = &ccstk[cxix--];
391 796
392 if (CxTYPE (cx) == CXt_SUB) 797 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
393 { 798 {
394 CV *cv = cx->blk_sub.cv; 799 CV *cv = cx->blk_sub.cv;
395 800
396 if (CvDEPTH (cv)) 801 if (ecb_expect_true (CvDEPTH (cv)))
397 { 802 {
398 EXTEND (SP, 3); 803 EXTEND (SP, 3);
399 PUSHs ((SV *)CvPADLIST (cv)); 804 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 805 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
401 PUSHs ((SV *)cv); 806 PUSHs ((SV *)cv);
402 807
403 CvDEPTH (cv) = 0; 808 CvDEPTH (cv) = 0;
404 get_padlist (cv); 809 get_padlist (aTHX_ cv);
405 } 810 }
406 } 811 }
407 } 812 }
408 813
409 if (top_si->si_type == PERLSI_MAIN) 814 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 815 break;
411 816
412 top_si = top_si->si_prev; 817 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 818 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 819 cxix = top_si->si_cxix;
415 } 820 }
416 821
417 PUTBACK; 822 PUTBACK;
418 } 823 }
419 824
420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 825 /* allocate some space on the context stack for our purposes */
421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 826 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 827 {
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 828 unsigned int i;
424 829
425#define VAR(name,type)c->name = PL_ ## name; 830 for (i = 0; i < SLOT_COUNT; ++i)
831 CXINC;
832
833 cxstack_ix -= SLOT_COUNT; /* undo allocation */
834 }
835
836 c->mainstack = PL_mainstack;
837
838 {
839 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
840
841#if CORO_JIT
842 save_perl_slots (slot);
843#else
844 #define VARx(name,expr,type) slot->name = expr;
426# include "state.h" 845 # include "state.h"
427#undef VAR 846 #undef VARx
847#endif
848 }
428} 849}
429 850
430/* 851/*
431 * allocate various perl stacks. This is an exact copy 852 * allocate various perl stacks. This is almost an exact copy
432 * of perl.c:init_stacks, except that it uses less memory 853 * of perl.c:init_stacks, except that it uses less memory
433 * on the (sometimes correct) assumption that coroutines do 854 * on the (sometimes correct) assumption that coroutines do
434 * not usually need a lot of stackspace. 855 * not usually need a lot of stackspace.
435 */ 856 */
436#if PREFER_PERL_FUNCTIONS 857#if CORO_PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks 858# define coro_init_stacks(thx) init_stacks ()
438#else 859#else
439static void 860static void
440coro_init_stacks () 861coro_init_stacks (pTHX)
441{ 862{
442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 863 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
443 PL_curstackinfo->si_type = PERLSI_MAIN; 864 PL_curstackinfo->si_type = PERLSI_MAIN;
444 PL_curstack = PL_curstackinfo->si_stack; 865 PL_curstack = PL_curstackinfo->si_stack;
445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 866 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446 867
447 PL_stack_base = AvARRAY(PL_curstack); 868 PL_stack_base = AvARRAY(PL_curstack);
448 PL_stack_sp = PL_stack_base; 869 PL_stack_sp = PL_stack_base;
449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 870 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450 871
451 New(50,PL_tmps_stack,128,SV*); 872 New(50,PL_tmps_stack,32,SV*);
452 PL_tmps_floor = -1; 873 PL_tmps_floor = -1;
453 PL_tmps_ix = -1; 874 PL_tmps_ix = -1;
454 PL_tmps_max = 128; 875 PL_tmps_max = 32;
455 876
456 New(54,PL_markstack,32,I32); 877 New(54,PL_markstack,16,I32);
457 PL_markstack_ptr = PL_markstack; 878 PL_markstack_ptr = PL_markstack;
458 PL_markstack_max = PL_markstack + 32; 879 PL_markstack_max = PL_markstack + 16;
459 880
460#ifdef SET_MARK_OFFSET 881#ifdef SET_MARK_OFFSET
461 SET_MARK_OFFSET; 882 SET_MARK_OFFSET;
462#endif 883#endif
463 884
464 New(54,PL_scopestack,32,I32); 885 New(54,PL_scopestack,8,I32);
465 PL_scopestack_ix = 0; 886 PL_scopestack_ix = 0;
466 PL_scopestack_max = 32; 887 PL_scopestack_max = 8;
888#if HAS_SCOPESTACK_NAME
889 New(54,PL_scopestack_name,8,const char*);
890#endif
467 891
468 New(54,PL_savestack,64,ANY); 892 New(54,PL_savestack,24,ANY);
469 PL_savestack_ix = 0; 893 PL_savestack_ix = 0;
470 PL_savestack_max = 64; 894 PL_savestack_max = 24;
471 895
472#if !PERL_VERSION_ATLEAST (5,9,0) 896#if !PERL_VERSION_ATLEAST (5,10,0)
473 New(54,PL_retstack,16,OP*); 897 New(54,PL_retstack,4,OP*);
474 PL_retstack_ix = 0; 898 PL_retstack_ix = 0;
475 PL_retstack_max = 16; 899 PL_retstack_max = 4;
476#endif 900#endif
477} 901}
478#endif 902#endif
479 903
480/* 904/*
481 * destroy the stacks, the callchain etc... 905 * destroy the stacks, the callchain etc...
482 */ 906 */
483static void 907static void
484coro_destroy_stacks () 908coro_destruct_stacks (pTHX)
485{ 909{
486 if (!IN_DESTRUCT)
487 {
488 /* restore all saved variables and stuff */
489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
491
492 /* free all temporaries */
493 FREETMPS;
494 assert (PL_tmps_ix == -1);
495
496 /* unwind all extra stacks */
497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
501 }
502
503 while (PL_curstackinfo->si_next) 910 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 911 PL_curstackinfo = PL_curstackinfo->si_next;
505 912
506 while (PL_curstackinfo) 913 while (PL_curstackinfo)
507 { 914 {
… …
516 } 923 }
517 924
518 Safefree (PL_tmps_stack); 925 Safefree (PL_tmps_stack);
519 Safefree (PL_markstack); 926 Safefree (PL_markstack);
520 Safefree (PL_scopestack); 927 Safefree (PL_scopestack);
928#if HAS_SCOPESTACK_NAME
929 Safefree (PL_scopestack_name);
930#endif
521 Safefree (PL_savestack); 931 Safefree (PL_savestack);
522#if !PERL_VERSION_ATLEAST (5,9,0) 932#if !PERL_VERSION_ATLEAST (5,10,0)
523 Safefree (PL_retstack); 933 Safefree (PL_retstack);
524#endif 934#endif
525} 935}
526 936
937#define CORO_RSS \
938 rss += sizeof (SYM (curstackinfo)); \
939 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
940 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
941 rss += SYM (tmps_max) * sizeof (SV *); \
942 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
943 rss += SYM (scopestack_max) * sizeof (I32); \
944 rss += SYM (savestack_max) * sizeof (ANY);
945
946static size_t
947coro_rss (pTHX_ struct coro *coro)
948{
949 size_t rss = sizeof (*coro);
950
951 if (coro->mainstack)
952 {
953 if (coro->flags & CF_RUNNING)
954 {
955 #define SYM(sym) PL_ ## sym
956 CORO_RSS;
957 #undef SYM
958 }
959 else
960 {
961 #define SYM(sym) coro->slot->sym
962 CORO_RSS;
963 #undef SYM
964 }
965 }
966
967 return rss;
968}
969
527/** coroutine stack handling ************************************************/ 970/** coroutine stack handling ************************************************/
528 971
972static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
973static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
974static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
975
976/* apparently < 5.8.8 */
977#ifndef MgPV_nolen_const
978#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
979 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
980 (const char*)(mg)->mg_ptr)
981#endif
982
983/*
984 * This overrides the default magic get method of %SIG elements.
985 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
986 * and instead of trying to save and restore the hash elements (extremely slow),
987 * we just provide our own readback here.
988 */
989static int ecb_cold
990coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
991{
992 const char *s = MgPV_nolen_const (mg);
993
994 if (*s == '_')
995 {
996 SV **svp = 0;
997
998 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
999 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1000
1001 if (svp)
1002 {
1003 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
1004 return 0;
1005 }
1006 }
1007
1008 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1009}
1010
1011static int ecb_cold
1012coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *old = *svp;
1026 *svp = 0;
1027 SvREFCNT_dec (old);
1028 return 0;
1029 }
1030 }
1031
1032 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1033}
1034
1035static int ecb_cold
1036coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1037{
1038 const char *s = MgPV_nolen_const (mg);
1039
1040 if (*s == '_')
1041 {
1042 SV **svp = 0;
1043
1044 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1045 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1046
1047 if (svp)
1048 {
1049 SV *old = *svp;
1050 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1051 SvREFCNT_dec (old);
1052 return 0;
1053 }
1054 }
1055
1056 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1057}
1058
1059static void
1060prepare_nop (pTHX_ struct coro_transfer_args *ta)
1061{
1062 /* kind of mega-hacky, but works */
1063 ta->next = ta->prev = (struct coro *)ta;
1064}
1065
529static void 1066static int
530setup_coro (struct coro *coro) 1067slf_check_nop (pTHX_ struct CoroSLF *frame)
1068{
1069 return 0;
1070}
1071
1072static int
1073slf_check_repeat (pTHX_ struct CoroSLF *frame)
1074{
1075 return 1;
1076}
1077
1078static UNOP init_perl_op;
1079
1080ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1081init_perl (pTHX_ struct coro *coro)
531{ 1082{
532 /* 1083 /*
533 * emulate part of the perl startup here. 1084 * emulate part of the perl startup here.
534 */ 1085 */
535
536 coro_init_stacks (); 1086 coro_init_stacks (aTHX);
537 1087
1088 PL_runops = RUNOPS_DEFAULT;
538 PL_curcop = &PL_compiling; 1089 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL; 1090 PL_in_eval = EVAL_NULL;
1091 PL_comppad = 0;
1092 PL_comppad_name = 0;
1093 PL_comppad_name_fill = 0;
1094 PL_comppad_name_floor = 0;
540 PL_curpm = 0; 1095 PL_curpm = 0;
1096 PL_curpad = 0;
541 PL_localizing = 0; 1097 PL_localizing = 0;
542 PL_dirty = 0;
543 PL_restartop = 0; 1098 PL_restartop = 0;
1099#if PERL_VERSION_ATLEAST (5,10,0)
1100 PL_parser = 0;
1101#endif
1102 PL_hints = 0;
1103
1104 /* recreate the die/warn hooks */
1105 PL_diehook = SvREFCNT_inc (rv_diehook);
1106 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1107
1108 GvSV (PL_defgv) = newSV (0);
1109 GvAV (PL_defgv) = coro->args; coro->args = 0;
1110 GvSV (PL_errgv) = newSV (0);
1111 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1112 GvHV (PL_hintgv) = 0;
1113 PL_rs = newSVsv (GvSV (irsgv));
1114 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
544 1115
545 { 1116 {
546 dSP; 1117 dSP;
547 LOGOP myop; 1118 UNOP myop;
548 1119
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP); 1120 Zero (&myop, 1, UNOP);
553 myop.op_next = Nullop; 1121 myop.op_next = Nullop;
1122 myop.op_type = OP_ENTERSUB;
554 myop.op_flags = OPf_WANT_VOID; 1123 myop.op_flags = OPf_WANT_VOID;
555 1124
556 PUSHMARK (SP); 1125 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1126 PUSHs ((SV *)coro->startcv);
558 PUTBACK; 1127 PUTBACK;
559 PL_op = (OP *)&myop; 1128 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1129 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN;
562 } 1130 }
563 1131
564 ENTER; /* necessary e.g. for dounwind */ 1132 /* this newly created coroutine might be run on an existing cctx which most
565} 1133 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1134 */
1135 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1136 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1137 slf_frame.destroy = 0;
566 1138
1139 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1140 init_perl_op.op_next = PL_op;
1141 init_perl_op.op_type = OP_ENTERSUB;
1142 init_perl_op.op_ppaddr = pp_slf;
1143 /* no flags etc. required, as an init function won't be called */
1144
1145 PL_op = (OP *)&init_perl_op;
1146
1147 /* copy throw, in case it was set before init_perl */
1148 CORO_THROW = coro->except;
1149
1150 SWAP_SVS (coro);
1151
1152 if (ecb_expect_false (enable_times))
1153 {
1154 coro_times_update ();
1155 coro_times_sub (coro);
1156 }
1157}
1158
567static void 1159static void
1160coro_unwind_stacks (pTHX)
1161{
1162 if (!IN_DESTRUCT)
1163 {
1164 /* restore all saved variables and stuff */
1165 LEAVE_SCOPE (0);
1166 assert (PL_tmps_floor == -1);
1167
1168 /* free all temporaries */
1169 FREETMPS;
1170 assert (PL_tmps_ix == -1);
1171
1172 /* unwind all extra stacks */
1173 POPSTACK_TO (PL_mainstack);
1174
1175 /* unwind main stack */
1176 dounwind (-1);
1177 }
1178}
1179
1180static void
1181destroy_perl (pTHX_ struct coro *coro)
1182{
1183 SV *svf [9];
1184
1185 {
1186 SV *old_current = SvRV (coro_current);
1187 struct coro *current = SvSTATE (old_current);
1188
1189 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1190
1191 save_perl (aTHX_ current);
1192
1193 /* this will cause transfer_check to croak on block*/
1194 SvRV_set (coro_current, (SV *)coro->hv);
1195
1196 load_perl (aTHX_ coro);
1197
1198 coro_unwind_stacks (aTHX);
1199
1200 /* restore swapped sv's */
1201 SWAP_SVS (coro);
1202
1203 coro_destruct_stacks (aTHX);
1204
1205 /* now save some sv's to be free'd later */
1206 svf [0] = GvSV (PL_defgv);
1207 svf [1] = (SV *)GvAV (PL_defgv);
1208 svf [2] = GvSV (PL_errgv);
1209 svf [3] = (SV *)PL_defoutgv;
1210 svf [4] = PL_rs;
1211 svf [5] = GvSV (irsgv);
1212 svf [6] = (SV *)GvHV (PL_hintgv);
1213 svf [7] = PL_diehook;
1214 svf [8] = PL_warnhook;
1215 assert (9 == sizeof (svf) / sizeof (*svf));
1216
1217 SvRV_set (coro_current, old_current);
1218
1219 load_perl (aTHX_ current);
1220 }
1221
1222 {
1223 unsigned int i;
1224
1225 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1226 SvREFCNT_dec (svf [i]);
1227
1228 SvREFCNT_dec (coro->saved_deffh);
1229 SvREFCNT_dec (coro->rouse_cb);
1230 SvREFCNT_dec (coro->invoke_cb);
1231 SvREFCNT_dec (coro->invoke_av);
1232 }
1233}
1234
1235ecb_inline void
568free_coro_mortal () 1236free_coro_mortal (pTHX)
569{ 1237{
570 if (coro_mortal) 1238 if (ecb_expect_true (coro_mortal))
571 { 1239 {
572 SvREFCNT_dec (coro_mortal); 1240 SvREFCNT_dec ((SV *)coro_mortal);
573 coro_mortal = 0; 1241 coro_mortal = 0;
574 } 1242 }
575} 1243}
576 1244
577/* inject a fake call to Coro::State::_cctx_init into the execution */
578static void NOINLINE
579prepare_cctx (coro_cctx *cctx)
580{
581 dSP;
582 LOGOP myop;
583
584 Zero (&myop, 1, LOGOP);
585 myop.op_next = PL_op;
586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
587
588 PUSHMARK (SP);
589 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK;
593 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595 SPAGAIN;
596}
597
598static void 1245static int
599coro_run (void *arg) 1246runops_trace (pTHX)
600{ 1247{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1248 COP *oldcop = 0;
602 UNLOCK; 1249 int oldcxix = -2;
603 1250
604 /* 1251 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
605 * this is a _very_ stripped down perl interpreter ;) 1252 {
606 */ 1253 PERL_ASYNC_CHECK ();
1254
1255 if (cctx_current->flags & CC_TRACE_ALL)
1256 {
1257 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1258 {
1259 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1260 SV **bot, **top;
1261 AV *av = newAV (); /* return values */
1262 SV **cb;
1263 dSP;
1264
1265 GV *gv = CvGV (cx->blk_sub.cv);
1266 SV *fullname = sv_2mortal (newSV (0));
1267 if (isGV (gv))
1268 gv_efullname3 (fullname, gv, 0);
1269
1270 bot = PL_stack_base + cx->blk_oldsp + 1;
1271 top = cx->blk_gimme == G_ARRAY ? SP + 1
1272 : cx->blk_gimme == G_SCALAR ? bot + 1
1273 : bot;
1274
1275 av_extend (av, top - bot);
1276 while (bot < top)
1277 av_push (av, SvREFCNT_inc_NN (*bot++));
1278
1279 PL_runops = RUNOPS_DEFAULT;
1280 ENTER;
1281 SAVETMPS;
1282 EXTEND (SP, 3);
1283 PUSHMARK (SP);
1284 PUSHs (&PL_sv_no);
1285 PUSHs (fullname);
1286 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1287 PUTBACK;
1288 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1289 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1290 SPAGAIN;
1291 FREETMPS;
1292 LEAVE;
1293 PL_runops = runops_trace;
1294 }
1295
1296 if (oldcop != PL_curcop)
1297 {
1298 oldcop = PL_curcop;
1299
1300 if (PL_curcop != &PL_compiling)
1301 {
1302 SV **cb;
1303
1304 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1305 {
1306 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1307
1308 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1309 {
1310 dSP;
1311 GV *gv = CvGV (cx->blk_sub.cv);
1312 SV *fullname = sv_2mortal (newSV (0));
1313
1314 if (isGV (gv))
1315 gv_efullname3 (fullname, gv, 0);
1316
1317 PL_runops = RUNOPS_DEFAULT;
1318 ENTER;
1319 SAVETMPS;
1320 EXTEND (SP, 3);
1321 PUSHMARK (SP);
1322 PUSHs (&PL_sv_yes);
1323 PUSHs (fullname);
1324 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1325 PUTBACK;
1326 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1327 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1328 SPAGAIN;
1329 FREETMPS;
1330 LEAVE;
1331 PL_runops = runops_trace;
1332 }
1333
1334 oldcxix = cxstack_ix;
1335 }
1336
1337 if (cctx_current->flags & CC_TRACE_LINE)
1338 {
1339 dSP;
1340
1341 PL_runops = RUNOPS_DEFAULT;
1342 ENTER;
1343 SAVETMPS;
1344 EXTEND (SP, 3);
1345 PL_runops = RUNOPS_DEFAULT;
1346 PUSHMARK (SP);
1347 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1348 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1349 PUTBACK;
1350 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1351 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1352 SPAGAIN;
1353 FREETMPS;
1354 LEAVE;
1355 PL_runops = runops_trace;
1356 }
1357 }
1358 }
1359 }
1360 }
1361
1362 TAINT_NOT;
1363 return 0;
1364}
1365
1366static struct CoroSLF cctx_ssl_frame;
1367
1368static void
1369slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1370{
1371 ta->prev = 0;
1372}
1373
1374static int
1375slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1376{
1377 *frame = cctx_ssl_frame;
1378
1379 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1380}
1381
1382/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1383static void ecb_noinline
1384cctx_prepare (pTHX)
1385{
607 PL_top_env = &PL_start_env; 1386 PL_top_env = &PL_start_env;
608 1387
1388 if (cctx_current->flags & CC_TRACE)
1389 PL_runops = runops_trace;
1390
1391 /* we already must be executing an SLF op, there is no other valid way
1392 * that can lead to creation of a new cctx */
1393 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1394 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1395
1396 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1397 cctx_ssl_frame = slf_frame;
1398
1399 slf_frame.prepare = slf_prepare_set_stacklevel;
1400 slf_frame.check = slf_check_set_stacklevel;
1401}
1402
1403/* the tail of transfer: execute stuff we can only do after a transfer */
1404ecb_inline void
1405transfer_tail (pTHX)
1406{
1407 free_coro_mortal (aTHX);
1408}
1409
1410/*
1411 * this is a _very_ stripped down perl interpreter ;)
1412 */
1413static void
1414cctx_run (void *arg)
1415{
1416#ifdef USE_ITHREADS
1417# if CORO_PTHREAD
1418 PERL_SET_CONTEXT (coro_thx);
1419# endif
1420#endif
1421 {
1422 dTHX;
1423
1424 /* normally we would need to skip the entersub here */
1425 /* not doing so will re-execute it, which is exactly what we want */
1426 /* PL_nop = PL_nop->op_next */
1427
609 /* inject call to cctx_init */ 1428 /* inject a fake subroutine call to cctx_init */
610 prepare_cctx ((coro_cctx *)arg); 1429 cctx_prepare (aTHX);
611 1430
1431 /* cctx_run is the alternative tail of transfer() */
1432 transfer_tail (aTHX);
1433
612 /* somebody will hit me for both perl_run and PL_restartop */ 1434 /* somebody or something will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op; 1435 PL_restartop = PL_op;
614 perl_run (PL_curinterp); 1436 perl_run (PL_curinterp);
1437 /*
1438 * Unfortunately, there is no way to get at the return values of the
1439 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1440 * runtime errors here, as this is just a random interpreter, not a thread.
1441 */
615 1442
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1443 /*
617 abort (); 1444 * If perl-run returns we assume exit() was being called or the coro
1445 * fell off the end, which seems to be the only valid (non-bug)
1446 * reason for perl_run to return. We try to exit by jumping to the
1447 * bootstrap-time "top" top_env, as we cannot restore the "main"
1448 * coroutine as Coro has no such concept.
1449 * This actually isn't valid with the pthread backend, but OSes requiring
1450 * that backend are too broken to do it in a standards-compliant way.
1451 */
1452 PL_top_env = main_top_env;
1453 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1454 }
618} 1455}
619 1456
620static coro_cctx * 1457static coro_cctx *
621cctx_new () 1458cctx_new (void)
622{ 1459{
623 coro_cctx *cctx; 1460 coro_cctx *cctx;
624 1461
625 ++cctx_count; 1462 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx); 1463 New (0, cctx, 1, coro_cctx);
1464
1465 cctx->gen = cctx_gen;
1466 cctx->flags = 0;
1467 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1468
1469 return cctx;
1470}
1471
1472/* create a new cctx only suitable as source */
1473static coro_cctx *
1474cctx_new_empty (void)
1475{
1476 coro_cctx *cctx = cctx_new ();
1477
1478 cctx->sptr = 0;
1479 coro_create (&cctx->cctx, 0, 0, 0, 0);
1480
1481 return cctx;
1482}
1483
1484/* create a new cctx suitable as destination/running a perl interpreter */
1485static coro_cctx *
1486cctx_new_run (void)
1487{
1488 coro_cctx *cctx = cctx_new ();
1489 void *stack_start;
1490 size_t stack_size;
628 1491
629#if HAVE_MMAP 1492#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1493 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */ 1494 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1495 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
634 1496
635 if (cctx->sptr == (void *)-1) 1497 if (cctx->sptr != (void *)-1)
1498 {
1499 #if CORO_STACKGUARD
1500 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1501 #endif
1502 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1503 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1504 cctx->flags |= CC_MAPPED;
636 { 1505 }
1506 else
1507#endif
1508 {
1509 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1510 New (0, cctx->sptr, cctx_stacksize, long);
1511
1512 if (!cctx->sptr)
1513 {
637 perror ("FATAL: unable to mmap stack for coroutine"); 1514 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
638 _exit (EXIT_FAILURE); 1515 _exit (EXIT_FAILURE);
639 } 1516 }
640 1517
641# if STACKGUARD 1518 stack_start = cctx->sptr;
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1519 stack_size = cctx->ssize;
643# endif
644
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 { 1520 }
652 perror ("FATAL: unable to malloc stack for coroutine");
653 _exit (EXIT_FAILURE);
654 }
655 1521
1522 #if CORO_USE_VALGRIND
1523 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
656#endif 1524 #endif
657 1525
658#if USE_VALGRIND 1526 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666 1527
667 return cctx; 1528 return cctx;
668} 1529}
669 1530
670static void 1531static void
671cctx_destroy (coro_cctx *cctx) 1532cctx_destroy (coro_cctx *cctx)
672{ 1533{
673 if (!cctx) 1534 if (!cctx)
674 return; 1535 return;
675 1536
1537 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1538
676 --cctx_count; 1539 --cctx_count;
1540 coro_destroy (&cctx->cctx);
677 1541
678#if USE_VALGRIND 1542 /* coro_transfer creates new, empty cctx's */
1543 if (cctx->sptr)
1544 {
1545 #if CORO_USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1546 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif 1547 #endif
681 1548
682#if HAVE_MMAP 1549#if HAVE_MMAP
1550 if (cctx->flags & CC_MAPPED)
683 munmap (cctx->sptr, cctx->ssize); 1551 munmap (cctx->sptr, cctx->ssize);
684#else 1552 else
1553#endif
685 Safefree (cctx->sptr); 1554 Safefree (cctx->sptr);
686#endif 1555 }
687 1556
688 Safefree (cctx); 1557 Safefree (cctx);
689} 1558}
690 1559
1560/* wether this cctx should be destructed */
1561#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1562
691static coro_cctx * 1563static coro_cctx *
692cctx_get () 1564cctx_get (pTHX)
693{ 1565{
694 coro_cctx *cctx; 1566 while (ecb_expect_true (cctx_first))
695
696 if (cctx_first)
697 { 1567 {
698 cctx = cctx_first; 1568 coro_cctx *cctx = cctx_first;
699 cctx_first = cctx->next; 1569 cctx_first = cctx->next;
700 --cctx_idle; 1570 --cctx_idle;
701 } 1571
702 else 1572 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
703 { 1573 return cctx;
704 cctx = cctx_new (); 1574
705 PL_op = PL_op->op_next; 1575 cctx_destroy (cctx);
706 } 1576 }
707 1577
708 return cctx; 1578 return cctx_new_run ();
709} 1579}
710 1580
711static void 1581static void
712cctx_put (coro_cctx *cctx) 1582cctx_put (coro_cctx *cctx)
713{ 1583{
1584 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1585
714 /* free another cctx if overlimit */ 1586 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX) 1587 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
716 { 1588 {
717 coro_cctx *first = cctx_first; 1589 coro_cctx *first = cctx_first;
718 cctx_first = first->next; 1590 cctx_first = first->next;
719 --cctx_idle; 1591 --cctx_idle;
720 1592
721 assert (!first->inuse);
722 cctx_destroy (first); 1593 cctx_destroy (first);
723 } 1594 }
724 1595
725 ++cctx_idle; 1596 ++cctx_idle;
726 cctx->next = cctx_first; 1597 cctx->next = cctx_first;
727 cctx_first = cctx; 1598 cctx_first = cctx;
728} 1599}
729 1600
730/** coroutine switching *****************************************************/ 1601/** coroutine switching *****************************************************/
731 1602
732/* never call directly, always through the coro_state_transfer global variable */ 1603static void
733static void NOINLINE
734transfer (struct coro *prev, struct coro *next) 1604transfer_check (pTHX_ struct coro *prev, struct coro *next)
1605{
1606 /* TODO: throwing up here is considered harmful */
1607
1608 if (ecb_expect_true (prev != next))
1609 {
1610 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1611 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1612
1613 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1614 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1615
1616#if !PERL_VERSION_ATLEAST (5,10,0)
1617 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1618 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1619#endif
1620 }
1621}
1622
1623/* always use the TRANSFER macro */
1624static void ecb_noinline /* noinline so we have a fixed stackframe */
1625transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
735{ 1626{
736 dSTACKLEVEL; 1627 dSTACKLEVEL;
737 1628
738 /* sometimes transfer is only called to set idle_sp */ 1629 /* sometimes transfer is only called to set idle_sp */
739 if (!next) 1630 if (ecb_expect_false (!prev))
740 { 1631 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1632 cctx_current->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1633 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 }
744 else if (prev != next)
745 { 1634 }
1635 else if (ecb_expect_true (prev != next))
1636 {
746 coro_cctx *prev__cctx; 1637 coro_cctx *cctx_prev;
747 1638
748 if (prev->flags & CF_NEW) 1639 if (ecb_expect_false (prev->flags & CF_NEW))
749 { 1640 {
750 /* create a new empty context */ 1641 /* create a new empty/source context */
751 Newz (0, prev->cctx, 1, coro_cctx);
752 prev->cctx->inuse = 1;
753 prev->flags &= ~CF_NEW; 1642 prev->flags &= ~CF_NEW;
754 prev->flags |= CF_RUNNING; 1643 prev->flags |= CF_RUNNING;
755 } 1644 }
756 1645
757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING; 1646 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING; 1647 next->flags |= CF_RUNNING;
769 1648
770 LOCK; 1649 /* first get rid of the old state */
1650 save_perl (aTHX_ prev);
771 1651
772 if (next->flags & CF_NEW) 1652 if (ecb_expect_false (next->flags & CF_NEW))
773 { 1653 {
774 /* need to start coroutine */ 1654 /* need to start coroutine */
775 next->flags &= ~CF_NEW; 1655 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */ 1656 /* setup coroutine call */
779 setup_coro (next); 1657 init_perl (aTHX_ next);
780 /* need a new stack */
781 assert (!next->cctx);
782 } 1658 }
783 else 1659 else
1660 load_perl (aTHX_ next);
1661
1662 /* possibly untie and reuse the cctx */
1663 if (ecb_expect_true (
1664 cctx_current->idle_sp == STACKLEVEL
1665 && !(cctx_current->flags & CC_TRACE)
1666 && !force_cctx
1667 ))
784 { 1668 {
785 /* coroutine already started */ 1669 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
786 save_perl (prev); 1670 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
787 load_perl (next); 1671
1672 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1673 /* without this the next cctx_get might destroy the running cctx while still in use */
1674 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1675 if (ecb_expect_true (!next->cctx))
1676 next->cctx = cctx_get (aTHX);
1677
1678 cctx_put (cctx_current);
788 } 1679 }
1680 else
1681 prev->cctx = cctx_current;
789 1682
790 prev__cctx = prev->cctx; 1683 ++next->usecount;
791 1684
792 /* possibly "free" the cctx */ 1685 cctx_prev = cctx_current;
793 if (prev__cctx->idle_sp == STACKLEVEL) 1686 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1687
1688 next->cctx = 0;
1689
1690 if (ecb_expect_false (cctx_prev != cctx_current))
794 { 1691 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1692 cctx_prev->top_env = PL_top_env;
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1693 PL_top_env = cctx_current->top_env;
797 1694 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 } 1695 }
803 1696
804 if (!next->cctx) 1697 transfer_tail (aTHX);
805 {
806 next->cctx = cctx_get ();
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810
811 if (prev__cctx != next->cctx)
812 {
813 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 }
817
818 free_coro_mortal ();
819 UNLOCK;
820 } 1698 }
821} 1699}
822 1700
823struct transfer_args 1701#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
824{
825 struct coro *prev, *next;
826};
827
828#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1702#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829 1703
830/** high level stuff ********************************************************/ 1704/** high level stuff ********************************************************/
831 1705
1706/* this function is actually Coro, not Coro::State, but we call it from here */
1707/* because it is convenient - but it hasn't been declared yet for that reason */
832static int 1708static void
1709coro_call_on_destroy (pTHX_ struct coro *coro);
1710
1711static void
833coro_state_destroy (struct coro *coro) 1712coro_state_destroy (pTHX_ struct coro *coro)
834{ 1713{
835 if (coro->flags & CF_DESTROYED) 1714 if (coro->flags & CF_ZOMBIE)
836 return 0; 1715 return;
837 1716
1717 slf_destroy (aTHX_ coro);
1718
838 coro->flags |= CF_DESTROYED; 1719 coro->flags |= CF_ZOMBIE;
839 1720
840 if (coro->flags & CF_READY) 1721 if (coro->flags & CF_READY)
841 { 1722 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1723 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove the coro */ 1724 /* alternative: look through all ready queues and remove the coro */
844 LOCK;
845 --coro_nready; 1725 --coro_nready;
846 UNLOCK;
847 } 1726 }
848 else 1727 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1728 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850 1729
851 if (coro->mainstack && coro->mainstack != main_mainstack) 1730 if (coro->next) coro->next->prev = coro->prev;
852 { 1731 if (coro->prev) coro->prev->next = coro->next;
853 struct coro temp; 1732 if (coro == coro_first) coro_first = coro->next;
854 1733
855 assert (!(coro->flags & CF_RUNNING)); 1734 if (coro->mainstack
856 1735 && coro->mainstack != main_mainstack
857 Zero (&temp, 1, struct coro); 1736 && coro->slot
858 temp.save = CORO_SAVE_ALL; 1737 && !PL_dirty)
859 1738 destroy_perl (aTHX_ coro);
860 if (coro->flags & CF_RUNNING)
861 croak ("FATAL: tried to destroy currently running coroutine");
862
863 save_perl (&temp);
864 load_perl (coro);
865
866 coro_destroy_stacks ();
867
868 load_perl (&temp); /* this will get rid of defsv etc.. */
869
870 coro->mainstack = 0;
871 }
872 1739
873 cctx_destroy (coro->cctx); 1740 cctx_destroy (coro->cctx);
1741 SvREFCNT_dec (coro->startcv);
874 SvREFCNT_dec (coro->args); 1742 SvREFCNT_dec (coro->args);
1743 SvREFCNT_dec (coro->swap_sv);
1744 SvREFCNT_dec (CORO_THROW);
875 1745
876 return 1; 1746 coro_call_on_destroy (aTHX_ coro);
1747
1748 /* more destruction mayhem in coro_state_free */
877} 1749}
878 1750
879static int 1751static int
880coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1752coro_state_free (pTHX_ SV *sv, MAGIC *mg)
881{ 1753{
882 struct coro *coro = (struct coro *)mg->mg_ptr; 1754 struct coro *coro = (struct coro *)mg->mg_ptr;
883 mg->mg_ptr = 0; 1755 mg->mg_ptr = 0;
884 1756
885 if (--coro->refcnt < 0)
886 {
887 coro_state_destroy (coro); 1757 coro_state_destroy (aTHX_ coro);
1758 SvREFCNT_dec (coro->on_destroy);
1759 SvREFCNT_dec (coro->status);
1760
888 Safefree (coro); 1761 Safefree (coro);
889 }
890 1762
891 return 0; 1763 return 0;
892} 1764}
893 1765
894static int 1766static int ecb_cold
895coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1767coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
896{ 1768{
897 struct coro *coro = (struct coro *)mg->mg_ptr; 1769 /* called when perl clones the current process the slow way (windows process emulation) */
898 1770 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
899 ++coro->refcnt; 1771 mg->mg_ptr = 0;
1772 mg->mg_virtual = 0;
900 1773
901 return 0; 1774 return 0;
902} 1775}
903 1776
904static MGVTBL coro_state_vtbl = { 1777static MGVTBL coro_state_vtbl = {
… …
910#else 1783#else
911# define MGf_DUP 0 1784# define MGf_DUP 0
912#endif 1785#endif
913}; 1786};
914 1787
915static struct coro *
916SvSTATE (SV *coro)
917{
918 HV *stash;
919 MAGIC *mg;
920
921 if (SvROK (coro))
922 coro = SvRV (coro);
923
924 stash = SvSTASH (coro);
925 if (stash != coro_stash && stash != coro_state_stash)
926 {
927 /* very slow, but rare, check */
928 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
929 croak ("Coro::State object required");
930 }
931
932 mg = SvMAGIC (coro);
933 assert (mg->mg_type == PERL_MAGIC_ext);
934 return (struct coro *)mg->mg_ptr;
935}
936
937static void 1788static void
938prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1789prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
939{ 1790{
940 ta->prev = SvSTATE (prev_sv); 1791 ta->prev = SvSTATE (prev_sv);
941 ta->next = SvSTATE (next_sv); 1792 ta->next = SvSTATE (next_sv);
1793 TRANSFER_CHECK (*ta);
942} 1794}
943 1795
944static void 1796static void
945api_transfer (SV *prev_sv, SV *next_sv) 1797api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
946{ 1798{
947 struct transfer_args ta; 1799 struct coro_transfer_args ta;
948 1800
949 prepare_transfer (&ta, prev_sv, next_sv); 1801 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
950 TRANSFER (ta); 1802 TRANSFER (ta, 1);
1803}
1804
1805/** Coro ********************************************************************/
1806
1807ecb_inline void
1808coro_enq (pTHX_ struct coro *coro)
1809{
1810 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1811
1812 SvREFCNT_inc_NN (coro->hv);
1813
1814 coro->next_ready = 0;
1815 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1816 ready [1] = coro;
1817}
1818
1819ecb_inline struct coro *
1820coro_deq (pTHX)
1821{
1822 int prio;
1823
1824 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1825 {
1826 struct coro **ready = coro_ready [prio];
1827
1828 if (ready [0])
1829 {
1830 struct coro *coro = ready [0];
1831 ready [0] = coro->next_ready;
1832 return coro;
1833 }
1834 }
1835
1836 return 0;
1837}
1838
1839static void
1840invoke_sv_ready_hook_helper (void)
1841{
1842 dTHX;
1843 dSP;
1844
1845 ENTER;
1846 SAVETMPS;
1847
1848 PUSHMARK (SP);
1849 PUTBACK;
1850 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1851
1852 FREETMPS;
1853 LEAVE;
951} 1854}
952 1855
953static int 1856static int
954api_save (SV *coro_sv, int new_save) 1857api_ready (pTHX_ SV *coro_sv)
955{ 1858{
956 struct coro *coro = SvSTATE (coro_sv); 1859 struct coro *coro = SvSTATE (coro_sv);
957 int old_save = coro->save;
958
959 if (new_save >= 0)
960 coro->save = new_save;
961
962 return old_save;
963}
964
965/** Coro ********************************************************************/
966
967static void
968coro_enq (SV *coro_sv)
969{
970 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
971}
972
973static SV *
974coro_deq (int min_prio)
975{
976 int prio = PRIO_MAX - PRIO_MIN;
977
978 min_prio -= PRIO_MIN;
979 if (min_prio < 0)
980 min_prio = 0;
981
982 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
983 if (AvFILLp (coro_ready [prio]) >= 0)
984 return av_shift (coro_ready [prio]);
985
986 return 0;
987}
988
989static int
990api_ready (SV *coro_sv)
991{
992 struct coro *coro;
993
994 if (SvROK (coro_sv))
995 coro_sv = SvRV (coro_sv);
996
997 coro = SvSTATE (coro_sv);
998 1860
999 if (coro->flags & CF_READY) 1861 if (coro->flags & CF_READY)
1000 return 0; 1862 return 0;
1001 1863
1002 coro->flags |= CF_READY; 1864 coro->flags |= CF_READY;
1003 1865
1004 LOCK; 1866 coro_enq (aTHX_ coro);
1005 coro_enq (SvREFCNT_inc (coro_sv)); 1867
1006 ++coro_nready; 1868 if (!coro_nready++)
1007 UNLOCK; 1869 if (coroapi.readyhook)
1870 coroapi.readyhook ();
1008 1871
1009 return 1; 1872 return 1;
1010} 1873}
1011 1874
1012static int 1875static int
1013api_is_ready (SV *coro_sv) 1876api_is_ready (pTHX_ SV *coro_sv)
1014{ 1877{
1015 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1878 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1016} 1879}
1017 1880
1881/* expects to own a reference to next->hv */
1882ecb_inline void
1883prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1884{
1885 SV *prev_sv = SvRV (coro_current);
1886
1887 ta->prev = SvSTATE_hv (prev_sv);
1888 ta->next = next;
1889
1890 TRANSFER_CHECK (*ta);
1891
1892 SvRV_set (coro_current, (SV *)next->hv);
1893
1894 free_coro_mortal (aTHX);
1895 coro_mortal = prev_sv;
1896}
1897
1018static void 1898static void
1019prepare_schedule (struct transfer_args *ta) 1899prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1020{ 1900{
1021 SV *prev_sv, *next_sv;
1022
1023 for (;;) 1901 for (;;)
1024 { 1902 {
1025 LOCK; 1903 struct coro *next = coro_deq (aTHX);
1026 next_sv = coro_deq (PRIO_MIN);
1027 1904
1905 if (ecb_expect_true (next))
1906 {
1907 /* cannot transfer to destroyed coros, skip and look for next */
1908 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1909 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1910 else
1911 {
1912 next->flags &= ~CF_READY;
1913 --coro_nready;
1914
1915 prepare_schedule_to (aTHX_ ta, next);
1916 break;
1917 }
1918 }
1919 else
1920 {
1028 /* nothing to schedule: call the idle handler */ 1921 /* nothing to schedule: call the idle handler */
1029 if (!next_sv) 1922 if (SvROK (sv_idle)
1923 && SvOBJECT (SvRV (sv_idle)))
1924 {
1925 if (SvRV (sv_idle) == SvRV (coro_current))
1926 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1927
1928 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1929 api_ready (aTHX_ SvRV (sv_idle));
1930 --coro_nready;
1931 }
1932 else
1933 {
1934 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1935 dSP;
1936
1937 ENTER;
1938 SAVETMPS;
1939
1940 PUSHMARK (SP);
1941 PUTBACK;
1942 call_sv (sv_idle, G_VOID | G_DISCARD);
1943
1944 FREETMPS;
1945 LEAVE;
1946 }
1947 }
1948 }
1949}
1950
1951ecb_inline void
1952prepare_cede (pTHX_ struct coro_transfer_args *ta)
1953{
1954 api_ready (aTHX_ coro_current);
1955 prepare_schedule (aTHX_ ta);
1956}
1957
1958ecb_inline void
1959prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1960{
1961 SV *prev = SvRV (coro_current);
1962
1963 if (coro_nready)
1964 {
1965 prepare_schedule (aTHX_ ta);
1966 api_ready (aTHX_ prev);
1967 }
1968 else
1969 prepare_nop (aTHX_ ta);
1970}
1971
1972static void
1973api_schedule (pTHX)
1974{
1975 struct coro_transfer_args ta;
1976
1977 prepare_schedule (aTHX_ &ta);
1978 TRANSFER (ta, 1);
1979}
1980
1981static void
1982api_schedule_to (pTHX_ SV *coro_sv)
1983{
1984 struct coro_transfer_args ta;
1985 struct coro *next = SvSTATE (coro_sv);
1986
1987 SvREFCNT_inc_NN (coro_sv);
1988 prepare_schedule_to (aTHX_ &ta, next);
1989}
1990
1991static int
1992api_cede (pTHX)
1993{
1994 struct coro_transfer_args ta;
1995
1996 prepare_cede (aTHX_ &ta);
1997
1998 if (ecb_expect_true (ta.prev != ta.next))
1999 {
2000 TRANSFER (ta, 1);
2001 return 1;
2002 }
2003 else
2004 return 0;
2005}
2006
2007static int
2008api_cede_notself (pTHX)
2009{
2010 if (coro_nready)
2011 {
2012 struct coro_transfer_args ta;
2013
2014 prepare_cede_notself (aTHX_ &ta);
2015 TRANSFER (ta, 1);
2016 return 1;
2017 }
2018 else
2019 return 0;
2020}
2021
2022static void
2023api_trace (pTHX_ SV *coro_sv, int flags)
2024{
2025 struct coro *coro = SvSTATE (coro_sv);
2026
2027 if (coro->flags & CF_RUNNING)
2028 croak ("cannot enable tracing on a running coroutine, caught");
2029
2030 if (flags & CC_TRACE)
2031 {
2032 if (!coro->cctx)
2033 coro->cctx = cctx_new_run ();
2034 else if (!(coro->cctx->flags & CC_TRACE))
2035 croak ("cannot enable tracing on coroutine with custom stack, caught");
2036
2037 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2038 }
2039 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2040 {
2041 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2042
2043 if (coro->flags & CF_RUNNING)
2044 PL_runops = RUNOPS_DEFAULT;
2045 else
2046 coro->slot->runops = RUNOPS_DEFAULT;
2047 }
2048}
2049
2050static void
2051coro_push_av (pTHX_ AV *av, I32 gimme_v)
2052{
2053 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2054 {
2055 dSP;
2056
2057 if (gimme_v == G_SCALAR)
2058 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2059 else
2060 {
2061 int i;
2062 EXTEND (SP, AvFILLp (av) + 1);
2063
2064 for (i = 0; i <= AvFILLp (av); ++i)
2065 PUSHs (AvARRAY (av)[i]);
2066 }
2067
2068 PUTBACK;
2069 }
2070}
2071
2072static void
2073coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2074{
2075 if (!coro->on_destroy)
2076 coro->on_destroy = newAV ();
2077
2078 av_push (coro->on_destroy, cb);
2079}
2080
2081static void
2082slf_destroy_join (pTHX_ struct CoroSLF *frame)
2083{
2084 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2085}
2086
2087static int
2088slf_check_join (pTHX_ struct CoroSLF *frame)
2089{
2090 struct coro *coro = (struct coro *)frame->data;
2091
2092 if (!coro->status)
2093 return 1;
2094
2095 frame->destroy = 0;
2096
2097 coro_push_av (aTHX_ coro->status, GIMME_V);
2098
2099 SvREFCNT_dec ((SV *)coro->hv);
2100
2101 return 0;
2102}
2103
2104static void
2105slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2108
2109 if (items > 1)
2110 croak ("join called with too many arguments");
2111
2112 if (coro->status)
2113 frame->prepare = prepare_nop;
2114 else
2115 {
2116 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2117 frame->prepare = prepare_schedule;
2118 }
2119
2120 frame->check = slf_check_join;
2121 frame->destroy = slf_destroy_join;
2122 frame->data = (void *)coro;
2123 SvREFCNT_inc (coro->hv);
2124}
2125
2126static void
2127coro_call_on_destroy (pTHX_ struct coro *coro)
2128{
2129 AV *od = coro->on_destroy;
2130
2131 if (!od)
2132 return;
2133
2134 while (AvFILLp (od) >= 0)
2135 {
2136 SV *cb = sv_2mortal (av_pop (od));
2137
2138 /* coro hv's (and only hv's at the moment) are supported as well */
2139 if (SvSTATEhv_p (aTHX_ cb))
2140 api_ready (aTHX_ cb);
2141 else
2142 {
2143 dSP; /* don't disturb outer sp */
2144 PUSHMARK (SP);
2145
2146 if (coro->status)
2147 {
2148 PUTBACK;
2149 coro_push_av (aTHX_ coro->status, G_ARRAY);
2150 SPAGAIN;
2151 }
2152
2153 PUTBACK;
2154 call_sv (cb, G_VOID | G_DISCARD);
2155 }
2156 }
2157}
2158
2159static void
2160coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2161{
2162 AV *av;
2163
2164 if (coro->status)
2165 {
2166 av = coro->status;
2167 av_clear (av);
2168 }
2169 else
2170 av = coro->status = newAV ();
2171
2172 /* items are actually not so common, so optimise for this case */
2173 if (items)
2174 {
2175 int i;
2176
2177 av_extend (av, items - 1);
2178
2179 for (i = 0; i < items; ++i)
2180 av_push (av, SvREFCNT_inc_NN (arg [i]));
2181 }
2182}
2183
2184static void
2185slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2186{
2187 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2188 api_ready (aTHX_ sv_manager);
2189
2190 frame->prepare = prepare_schedule;
2191 frame->check = slf_check_repeat;
2192
2193 /* as a minor optimisation, we could unwind all stacks here */
2194 /* but that puts extra pressure on pp_slf, and is not worth much */
2195 /*coro_unwind_stacks (aTHX);*/
2196}
2197
2198static void
2199slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2200{
2201 HV *coro_hv = (HV *)SvRV (coro_current);
2202
2203 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2204 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2205}
2206
2207static void
2208slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 HV *coro_hv;
2211 struct coro *coro;
2212
2213 if (items <= 0)
2214 croak ("Coro::cancel called without coro object,");
2215
2216 coro = SvSTATE (arg [0]);
2217 coro_hv = coro->hv;
2218
2219 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2220
2221 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2222 {
2223 /* coro currently busy cancelling something, so just notify it */
2224 coro->slf_frame.data = (void *)coro;
2225
2226 frame->prepare = prepare_nop;
2227 frame->check = slf_check_nop;
2228 }
2229 else if (coro_hv == (HV *)SvRV (coro_current))
2230 {
2231 /* cancelling the current coro is allowed, and equals terminate */
2232 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2233 }
2234 else
2235 {
2236 struct coro *self = SvSTATE_current;
2237
2238 /* otherwise we cancel directly, purely for speed reasons
2239 * unfortunately, this requires some magic trickery, as
2240 * somebody else could cancel us, so we have to fight the cancellation.
2241 * this is ugly, and hopefully fully worth the extra speed.
2242 * besides, I can't get the slow-but-safe version working...
2243 */
2244 slf_frame.data = 0;
2245 self->flags |= CF_NOCANCEL;
2246 coro_state_destroy (aTHX_ coro);
2247 self->flags &= ~CF_NOCANCEL;
2248
2249 if (slf_frame.data)
2250 {
2251 /* while we were busy we have been cancelled, so terminate */
2252 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2253 }
2254 else
2255 {
2256 frame->prepare = prepare_nop;
2257 frame->check = slf_check_nop;
2258 }
2259 }
2260}
2261
2262static int
2263slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2264{
2265 frame->prepare = 0;
2266 coro_unwind_stacks (aTHX);
2267
2268 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2269
2270 return 1;
2271}
2272
2273static int
2274safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2275{
2276 if (coro->cctx)
2277 croak ("coro inside C callback, unable to cancel at this time, caught");
2278
2279 if (coro->flags & CF_NEW)
2280 {
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro_state_destroy (aTHX_ coro);
2283 }
2284 else
2285 {
2286 if (!coro->slf_frame.prepare)
2287 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2288
2289 slf_destroy (aTHX_ coro);
2290
2291 coro_set_status (aTHX_ coro, arg, items);
2292 coro->slf_frame.prepare = prepare_nop;
2293 coro->slf_frame.check = slf_check_safe_cancel;
2294
2295 api_ready (aTHX_ (SV *)coro->hv);
2296 }
2297
2298 return 1;
2299}
2300
2301/*****************************************************************************/
2302/* async pool handler */
2303
2304static int
2305slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2306{
2307 HV *hv = (HV *)SvRV (coro_current);
2308 struct coro *coro = (struct coro *)frame->data;
2309
2310 if (!coro->invoke_cb)
2311 return 1; /* loop till we have invoke */
2312 else
2313 {
2314 hv_store (hv, "desc", sizeof ("desc") - 1,
2315 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2316
2317 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2318
2319 {
2320 dSP;
2321 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2322 PUTBACK;
2323 }
2324
2325 SvREFCNT_dec (GvAV (PL_defgv));
2326 GvAV (PL_defgv) = coro->invoke_av;
2327 coro->invoke_av = 0;
2328
2329 return 0;
2330 }
2331}
2332
2333static void
2334slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2335{
2336 HV *hv = (HV *)SvRV (coro_current);
2337 struct coro *coro = SvSTATE_hv ((SV *)hv);
2338
2339 if (ecb_expect_true (coro->saved_deffh))
2340 {
2341 /* subsequent iteration */
2342 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2343 coro->saved_deffh = 0;
2344
2345 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2346 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2347 {
2348 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2349 return;
2350 }
2351 else
2352 {
2353 av_clear (GvAV (PL_defgv));
2354 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2355
2356 coro->prio = 0;
2357
2358 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2359 api_trace (aTHX_ coro_current, 0);
2360
2361 frame->prepare = prepare_schedule;
2362 av_push (av_async_pool, SvREFCNT_inc (hv));
2363 }
2364 }
2365 else
2366 {
2367 /* first iteration, simply fall through */
2368 frame->prepare = prepare_nop;
2369 }
2370
2371 frame->check = slf_check_pool_handler;
2372 frame->data = (void *)coro;
2373}
2374
2375/*****************************************************************************/
2376/* rouse callback */
2377
2378#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2379
2380static void
2381coro_rouse_callback (pTHX_ CV *cv)
2382{
2383 dXSARGS;
2384 SV *data = (SV *)S_GENSUB_ARG;
2385
2386 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2387 {
2388 /* first call, set args */
2389 SV *coro = SvRV (data);
2390 AV *av = newAV ();
2391
2392 SvRV_set (data, (SV *)av);
2393
2394 /* better take a full copy of the arguments */
2395 while (items--)
2396 av_store (av, items, newSVsv (ST (items)));
2397
2398 api_ready (aTHX_ coro);
2399 SvREFCNT_dec (coro);
2400 }
2401
2402 XSRETURN_EMPTY;
2403}
2404
2405static int
2406slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2407{
2408 SV *data = (SV *)frame->data;
2409
2410 if (CORO_THROW)
2411 return 0;
2412
2413 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2414 return 1;
2415
2416 /* now push all results on the stack */
2417 {
2418 dSP;
2419 AV *av = (AV *)SvRV (data);
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (av) + 1);
2423 for (i = 0; i <= AvFILLp (av); ++i)
2424 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2425
2426 /* we have stolen the elements, so set length to zero and free */
2427 AvFILLp (av) = -1;
2428 av_undef (av);
2429
2430 PUTBACK;
2431 }
2432
2433 return 0;
2434}
2435
2436static void
2437slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2438{
2439 SV *cb;
2440
2441 if (items)
2442 cb = arg [0];
2443 else
2444 {
2445 struct coro *coro = SvSTATE_current;
2446
2447 if (!coro->rouse_cb)
2448 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2449
2450 cb = sv_2mortal (coro->rouse_cb);
2451 coro->rouse_cb = 0;
2452 }
2453
2454 if (!SvROK (cb)
2455 || SvTYPE (SvRV (cb)) != SVt_PVCV
2456 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2457 croak ("Coro::rouse_wait called with illegal callback argument,");
2458
2459 {
2460 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2461 SV *data = (SV *)S_GENSUB_ARG;
2462
2463 frame->data = (void *)data;
2464 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2465 frame->check = slf_check_rouse_wait;
2466 }
2467}
2468
2469static SV *
2470coro_new_rouse_cb (pTHX)
2471{
2472 HV *hv = (HV *)SvRV (coro_current);
2473 struct coro *coro = SvSTATE_hv (hv);
2474 SV *data = newRV_inc ((SV *)hv);
2475 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2476
2477 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2478 SvREFCNT_dec (data); /* magicext increases the refcount */
2479
2480 SvREFCNT_dec (coro->rouse_cb);
2481 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2482
2483 return cb;
2484}
2485
2486/*****************************************************************************/
2487/* schedule-like-function opcode (SLF) */
2488
2489static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2490static const CV *slf_cv;
2491static SV **slf_argv;
2492static int slf_argc, slf_arga; /* count, allocated */
2493static I32 slf_ax; /* top of stack, for restore */
2494
2495/* this restores the stack in the case we patched the entersub, to */
2496/* recreate the stack frame as perl will on following calls */
2497/* since entersub cleared the stack */
2498static OP *
2499pp_restore (pTHX)
2500{
2501 int i;
2502 SV **SP = PL_stack_base + slf_ax;
2503
2504 PUSHMARK (SP);
2505
2506 EXTEND (SP, slf_argc + 1);
2507
2508 for (i = 0; i < slf_argc; ++i)
2509 PUSHs (sv_2mortal (slf_argv [i]));
2510
2511 PUSHs ((SV *)CvGV (slf_cv));
2512
2513 RETURNOP (slf_restore.op_first);
2514}
2515
2516static void
2517slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2518{
2519 SV **arg = (SV **)slf_frame.data;
2520
2521 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2522}
2523
2524static void
2525slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (items != 2)
2528 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2529
2530 frame->prepare = slf_prepare_transfer;
2531 frame->check = slf_check_nop;
2532 frame->data = (void *)arg; /* let's hope it will stay valid */
2533}
2534
2535static void
2536slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 frame->prepare = prepare_schedule;
2539 frame->check = slf_check_nop;
2540}
2541
2542static void
2543slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2544{
2545 struct coro *next = (struct coro *)slf_frame.data;
2546
2547 SvREFCNT_inc_NN (next->hv);
2548 prepare_schedule_to (aTHX_ ta, next);
2549}
2550
2551static void
2552slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2553{
2554 if (!items)
2555 croak ("Coro::schedule_to expects a coroutine argument, caught");
2556
2557 frame->data = (void *)SvSTATE (arg [0]);
2558 frame->prepare = slf_prepare_schedule_to;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2564{
2565 api_ready (aTHX_ SvRV (coro_current));
2566
2567 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2568}
2569
2570static void
2571slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 frame->prepare = prepare_cede;
2574 frame->check = slf_check_nop;
2575}
2576
2577static void
2578slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2579{
2580 frame->prepare = prepare_cede_notself;
2581 frame->check = slf_check_nop;
2582}
2583
2584/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2585static void
2586slf_destroy (pTHX_ struct coro *coro)
2587{
2588 /* this callback is reserved for slf functions needing to do cleanup */
2589 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2590 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2591
2592 /*
2593 * The on_destroy above most likely is from an SLF call.
2594 * Since by definition the SLF call will not finish when we destroy
2595 * the coro, we will have to force-finish it here, otherwise
2596 * cleanup functions cannot call SLF functions.
2597 */
2598 coro->slf_frame.prepare = 0;
2599}
2600
2601/*
2602 * these not obviously related functions are all rolled into one
2603 * function to increase chances that they all will call transfer with the same
2604 * stack offset
2605 * SLF stands for "schedule-like-function".
2606 */
2607static OP *
2608pp_slf (pTHX)
2609{
2610 I32 checkmark; /* mark SP to see how many elements check has pushed */
2611
2612 /* set up the slf frame, unless it has already been set-up */
2613 /* the latter happens when a new coro has been started */
2614 /* or when a new cctx was attached to an existing coroutine */
2615 if (ecb_expect_true (!slf_frame.prepare))
2616 {
2617 /* first iteration */
2618 dSP;
2619 SV **arg = PL_stack_base + TOPMARK + 1;
2620 int items = SP - arg; /* args without function object */
2621 SV *gv = *sp;
2622
2623 /* do a quick consistency check on the "function" object, and if it isn't */
2624 /* for us, divert to the real entersub */
2625 if (SvTYPE (gv) != SVt_PVGV
2626 || !GvCV (gv)
2627 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2628 return PL_ppaddr[OP_ENTERSUB](aTHX);
2629
2630 if (!(PL_op->op_flags & OPf_STACKED))
2631 {
2632 /* ampersand-form of call, use @_ instead of stack */
2633 AV *av = GvAV (PL_defgv);
2634 arg = AvARRAY (av);
2635 items = AvFILLp (av) + 1;
2636 }
2637
2638 /* now call the init function, which needs to set up slf_frame */
2639 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2640 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2641
2642 /* pop args */
2643 SP = PL_stack_base + POPMARK;
2644
2645 PUTBACK;
2646 }
2647
2648 /* now that we have a slf_frame, interpret it! */
2649 /* we use a callback system not to make the code needlessly */
2650 /* complicated, but so we can run multiple perl coros from one cctx */
2651
2652 do
2653 {
2654 struct coro_transfer_args ta;
2655
2656 slf_frame.prepare (aTHX_ &ta);
2657 TRANSFER (ta, 0);
2658
2659 checkmark = PL_stack_sp - PL_stack_base;
2660 }
2661 while (slf_frame.check (aTHX_ &slf_frame));
2662
2663 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2664
2665 /* exception handling */
2666 if (ecb_expect_false (CORO_THROW))
2667 {
2668 SV *exception = sv_2mortal (CORO_THROW);
2669
2670 CORO_THROW = 0;
2671 sv_setsv (ERRSV, exception);
2672 croak (0);
2673 }
2674
2675 /* return value handling - mostly like entersub */
2676 /* make sure we put something on the stack in scalar context */
2677 if (GIMME_V == G_SCALAR
2678 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2679 {
2680 dSP;
2681 SV **bot = PL_stack_base + checkmark;
2682
2683 if (sp == bot) /* too few, push undef */
2684 bot [1] = &PL_sv_undef;
2685 else /* too many, take last one */
2686 bot [1] = *sp;
2687
2688 SP = bot + 1;
2689
2690 PUTBACK;
2691 }
2692
2693 return NORMAL;
2694}
2695
2696static void
2697api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2698{
2699 int i;
2700 SV **arg = PL_stack_base + ax;
2701 int items = PL_stack_sp - arg + 1;
2702
2703 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2704
2705 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2706 && PL_op->op_ppaddr != pp_slf)
2707 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2708
2709 CvFLAGS (cv) |= CVf_SLF;
2710 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2711 slf_cv = cv;
2712
2713 /* we patch the op, and then re-run the whole call */
2714 /* we have to put the same argument on the stack for this to work */
2715 /* and this will be done by pp_restore */
2716 slf_restore.op_next = (OP *)&slf_restore;
2717 slf_restore.op_type = OP_CUSTOM;
2718 slf_restore.op_ppaddr = pp_restore;
2719 slf_restore.op_first = PL_op;
2720
2721 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2722
2723 if (PL_op->op_flags & OPf_STACKED)
2724 {
2725 if (items > slf_arga)
2726 {
2727 slf_arga = items;
2728 Safefree (slf_argv);
2729 New (0, slf_argv, slf_arga, SV *);
2730 }
2731
2732 slf_argc = items;
2733
2734 for (i = 0; i < items; ++i)
2735 slf_argv [i] = SvREFCNT_inc (arg [i]);
2736 }
2737 else
2738 slf_argc = 0;
2739
2740 PL_op->op_ppaddr = pp_slf;
2741 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2742
2743 PL_op = (OP *)&slf_restore;
2744}
2745
2746/*****************************************************************************/
2747/* dynamic wind */
2748
2749static void
2750on_enterleave_call (pTHX_ SV *cb)
2751{
2752 dSP;
2753
2754 PUSHSTACK;
2755
2756 PUSHMARK (SP);
2757 PUTBACK;
2758 call_sv (cb, G_VOID | G_DISCARD);
2759 SPAGAIN;
2760
2761 POPSTACK;
2762}
2763
2764static SV *
2765coro_avp_pop_and_free (pTHX_ AV **avp)
2766{
2767 AV *av = *avp;
2768 SV *res = av_pop (av);
2769
2770 if (AvFILLp (av) < 0)
2771 {
2772 *avp = 0;
2773 SvREFCNT_dec (av);
2774 }
2775
2776 return res;
2777}
2778
2779static void
2780coro_pop_on_enter (pTHX_ void *coro)
2781{
2782 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2783 SvREFCNT_dec (cb);
2784}
2785
2786static void
2787coro_pop_on_leave (pTHX_ void *coro)
2788{
2789 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2790 on_enterleave_call (aTHX_ sv_2mortal (cb));
2791}
2792
2793/*****************************************************************************/
2794/* PerlIO::cede */
2795
2796typedef struct
2797{
2798 PerlIOBuf base;
2799 NV next, every;
2800} PerlIOCede;
2801
2802static IV ecb_cold
2803PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2804{
2805 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2806
2807 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2808 self->next = nvtime () + self->every;
2809
2810 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2811}
2812
2813static SV * ecb_cold
2814PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2815{
2816 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2817
2818 return newSVnv (self->every);
2819}
2820
2821static IV
2822PerlIOCede_flush (pTHX_ PerlIO *f)
2823{
2824 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2825 double now = nvtime ();
2826
2827 if (now >= self->next)
2828 {
2829 api_cede (aTHX);
2830 self->next = now + self->every;
2831 }
2832
2833 return PerlIOBuf_flush (aTHX_ f);
2834}
2835
2836static PerlIO_funcs PerlIO_cede =
2837{
2838 sizeof(PerlIO_funcs),
2839 "cede",
2840 sizeof(PerlIOCede),
2841 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2842 PerlIOCede_pushed,
2843 PerlIOBuf_popped,
2844 PerlIOBuf_open,
2845 PerlIOBase_binmode,
2846 PerlIOCede_getarg,
2847 PerlIOBase_fileno,
2848 PerlIOBuf_dup,
2849 PerlIOBuf_read,
2850 PerlIOBuf_unread,
2851 PerlIOBuf_write,
2852 PerlIOBuf_seek,
2853 PerlIOBuf_tell,
2854 PerlIOBuf_close,
2855 PerlIOCede_flush,
2856 PerlIOBuf_fill,
2857 PerlIOBase_eof,
2858 PerlIOBase_error,
2859 PerlIOBase_clearerr,
2860 PerlIOBase_setlinebuf,
2861 PerlIOBuf_get_base,
2862 PerlIOBuf_bufsiz,
2863 PerlIOBuf_get_ptr,
2864 PerlIOBuf_get_cnt,
2865 PerlIOBuf_set_ptrcnt,
2866};
2867
2868/*****************************************************************************/
2869/* Coro::Semaphore & Coro::Signal */
2870
2871static SV *
2872coro_waitarray_new (pTHX_ int count)
2873{
2874 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2875 AV *av = newAV ();
2876 SV **ary;
2877
2878 /* unfortunately, building manually saves memory */
2879 Newx (ary, 2, SV *);
2880 AvALLOC (av) = ary;
2881#if PERL_VERSION_ATLEAST (5,10,0)
2882 AvARRAY (av) = ary;
2883#else
2884 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2885 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2886 SvPVX ((SV *)av) = (char *)ary;
2887#endif
2888 AvMAX (av) = 1;
2889 AvFILLp (av) = 0;
2890 ary [0] = newSViv (count);
2891
2892 return newRV_noinc ((SV *)av);
2893}
2894
2895/* semaphore */
2896
2897static void
2898coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2899{
2900 SV *count_sv = AvARRAY (av)[0];
2901 IV count = SvIVX (count_sv);
2902
2903 count += adjust;
2904 SvIVX (count_sv) = count;
2905
2906 /* now wake up as many waiters as are expected to lock */
2907 while (count > 0 && AvFILLp (av) > 0)
2908 {
2909 SV *cb;
2910
2911 /* swap first two elements so we can shift a waiter */
2912 AvARRAY (av)[0] = AvARRAY (av)[1];
2913 AvARRAY (av)[1] = count_sv;
2914 cb = av_shift (av);
2915
2916 if (SvOBJECT (cb))
2917 {
2918 api_ready (aTHX_ cb);
2919 --count;
2920 }
2921 else if (SvTYPE (cb) == SVt_PVCV)
1030 { 2922 {
1031 dSP; 2923 dSP;
1032 UNLOCK;
1033
1034 ENTER;
1035 SAVETMPS;
1036
1037 PUSHMARK (SP); 2924 PUSHMARK (SP);
2925 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1038 PUTBACK; 2926 PUTBACK;
1039 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2927 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1040
1041 FREETMPS;
1042 LEAVE;
1043 continue;
1044 } 2928 }
1045 2929
1046 ta->next = SvSTATE (next_sv); 2930 SvREFCNT_dec (cb);
2931 }
2932}
1047 2933
1048 /* cannot transfer to destroyed coros, skip and look for next */ 2934static void
1049 if (ta->next->flags & CF_DESTROYED) 2935coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2936{
2937 /* call $sem->adjust (0) to possibly wake up some other waiters */
2938 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2939}
2940
2941static int
2942slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2943{
2944 AV *av = (AV *)frame->data;
2945 SV *count_sv = AvARRAY (av)[0];
2946 SV *coro_hv = SvRV (coro_current);
2947
2948 /* if we are about to throw, don't actually acquire the lock, just throw */
2949 if (CORO_THROW)
2950 return 0;
2951 else if (SvIVX (count_sv) > 0)
2952 {
2953 frame->destroy = 0;
2954
2955 if (acquire)
2956 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2957 else
2958 coro_semaphore_adjust (aTHX_ av, 0);
2959
2960 return 0;
2961 }
2962 else
2963 {
2964 int i;
2965 /* if we were woken up but can't down, we look through the whole */
2966 /* waiters list and only add us if we aren't in there already */
2967 /* this avoids some degenerate memory usage cases */
2968 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2969 if (AvARRAY (av)[i] == coro_hv)
2970 return 1;
2971
2972 av_push (av, SvREFCNT_inc (coro_hv));
2973 return 1;
2974 }
2975}
2976
2977static int
2978slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2979{
2980 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2981}
2982
2983static int
2984slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2985{
2986 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2987}
2988
2989static void
2990slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2991{
2992 AV *av = (AV *)SvRV (arg [0]);
2993
2994 if (SvIVX (AvARRAY (av)[0]) > 0)
2995 {
2996 frame->data = (void *)av;
2997 frame->prepare = prepare_nop;
2998 }
2999 else
3000 {
3001 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3002
3003 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3004 frame->prepare = prepare_schedule;
3005 /* to avoid race conditions when a woken-up coro gets terminated */
3006 /* we arrange for a temporary on_destroy that calls adjust (0) */
3007 frame->destroy = coro_semaphore_destroy;
3008 }
3009}
3010
3011static void
3012slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3013{
3014 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3015 frame->check = slf_check_semaphore_down;
3016}
3017
3018static void
3019slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3020{
3021 if (items >= 2)
3022 {
3023 /* callback form */
3024 AV *av = (AV *)SvRV (arg [0]);
3025 SV *cb_cv = s_get_cv_croak (arg [1]);
3026
3027 av_push (av, SvREFCNT_inc_NN (cb_cv));
3028
3029 if (SvIVX (AvARRAY (av)[0]) > 0)
3030 coro_semaphore_adjust (aTHX_ av, 0);
3031
3032 frame->prepare = prepare_nop;
3033 frame->check = slf_check_nop;
3034 }
3035 else
3036 {
3037 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3038 frame->check = slf_check_semaphore_wait;
3039 }
3040}
3041
3042/* signal */
3043
3044static void
3045coro_signal_wake (pTHX_ AV *av, int count)
3046{
3047 SvIVX (AvARRAY (av)[0]) = 0;
3048
3049 /* now signal count waiters */
3050 while (count > 0 && AvFILLp (av) > 0)
3051 {
3052 SV *cb;
3053
3054 /* swap first two elements so we can shift a waiter */
3055 cb = AvARRAY (av)[0];
3056 AvARRAY (av)[0] = AvARRAY (av)[1];
3057 AvARRAY (av)[1] = cb;
3058
3059 cb = av_shift (av);
3060
3061 if (SvTYPE (cb) == SVt_PVCV)
1050 { 3062 {
3063 dSP;
3064 PUSHMARK (SP);
3065 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1051 UNLOCK; 3066 PUTBACK;
1052 SvREFCNT_dec (next_sv); 3067 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1053 /* coro_nready is already taken care of by destroy */
1054 continue;
1055 } 3068 }
3069 else
3070 {
3071 api_ready (aTHX_ cb);
3072 sv_setiv (cb, 0); /* signal waiter */
3073 }
1056 3074
1057 --coro_nready; 3075 SvREFCNT_dec (cb);
1058 UNLOCK;
1059 break;
1060 }
1061 3076
1062 /* free this only after the transfer */ 3077 --count;
1063 prev_sv = SvRV (coro_current); 3078 }
1064 SvRV_set (coro_current, next_sv);
1065 ta->prev = SvSTATE (prev_sv);
1066
1067 assert (ta->next->flags & CF_READY);
1068 ta->next->flags &= ~CF_READY;
1069
1070 LOCK;
1071 free_coro_mortal ();
1072 coro_mortal = prev_sv;
1073 UNLOCK;
1074}
1075
1076static void
1077prepare_cede (struct transfer_args *ta)
1078{
1079 api_ready (coro_current);
1080 prepare_schedule (ta);
1081} 3079}
1082 3080
1083static int 3081static int
1084prepare_cede_notself (struct transfer_args *ta) 3082slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1085{ 3083{
1086 if (coro_nready) 3084 /* if we are about to throw, also stop waiting */
3085 return SvROK ((SV *)frame->data) && !CORO_THROW;
3086}
3087
3088static void
3089slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3090{
3091 AV *av = (AV *)SvRV (arg [0]);
3092
3093 if (items >= 2)
3094 {
3095 SV *cb_cv = s_get_cv_croak (arg [1]);
3096 av_push (av, SvREFCNT_inc_NN (cb_cv));
3097
3098 if (SvIVX (AvARRAY (av)[0]))
3099 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3100
3101 frame->prepare = prepare_nop;
3102 frame->check = slf_check_nop;
1087 { 3103 }
1088 SV *prev = SvRV (coro_current); 3104 else if (SvIVX (AvARRAY (av)[0]))
1089 prepare_schedule (ta); 3105 {
1090 api_ready (prev); 3106 SvIVX (AvARRAY (av)[0]) = 0;
1091 return 1; 3107 frame->prepare = prepare_nop;
3108 frame->check = slf_check_nop;
1092 } 3109 }
1093 else 3110 else
3111 {
3112 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3113
3114 av_push (av, waiter);
3115
3116 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3117 frame->prepare = prepare_schedule;
3118 frame->check = slf_check_signal_wait;
3119 }
3120}
3121
3122/*****************************************************************************/
3123/* Coro::AIO */
3124
3125#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3126
3127/* helper storage struct */
3128struct io_state
3129{
3130 int errorno;
3131 I32 laststype; /* U16 in 5.10.0 */
3132 int laststatval;
3133 Stat_t statcache;
3134};
3135
3136static void
3137coro_aio_callback (pTHX_ CV *cv)
3138{
3139 dXSARGS;
3140 AV *state = (AV *)S_GENSUB_ARG;
3141 SV *coro = av_pop (state);
3142 SV *data_sv = newSV (sizeof (struct io_state));
3143
3144 av_extend (state, items - 1);
3145
3146 sv_upgrade (data_sv, SVt_PV);
3147 SvCUR_set (data_sv, sizeof (struct io_state));
3148 SvPOK_only (data_sv);
3149
3150 {
3151 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3152
3153 data->errorno = errno;
3154 data->laststype = PL_laststype;
3155 data->laststatval = PL_laststatval;
3156 data->statcache = PL_statcache;
3157 }
3158
3159 /* now build the result vector out of all the parameters and the data_sv */
3160 {
3161 int i;
3162
3163 for (i = 0; i < items; ++i)
3164 av_push (state, SvREFCNT_inc_NN (ST (i)));
3165 }
3166
3167 av_push (state, data_sv);
3168
3169 api_ready (aTHX_ coro);
3170 SvREFCNT_dec (coro);
3171 SvREFCNT_dec ((AV *)state);
3172}
3173
3174static int
3175slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3176{
3177 AV *state = (AV *)frame->data;
3178
3179 /* if we are about to throw, return early */
3180 /* this does not cancel the aio request, but at least */
3181 /* it quickly returns */
3182 if (CORO_THROW)
1094 return 0; 3183 return 0;
1095}
1096 3184
1097static void 3185 /* one element that is an RV? repeat! */
1098api_schedule (void) 3186 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1099{
1100 struct transfer_args ta;
1101
1102 prepare_schedule (&ta);
1103 TRANSFER (ta);
1104}
1105
1106static int
1107api_cede (void)
1108{
1109 struct transfer_args ta;
1110
1111 prepare_cede (&ta);
1112
1113 if (ta.prev != ta.next)
1114 {
1115 TRANSFER (ta);
1116 return 1; 3187 return 1;
3188
3189 /* restore status */
3190 {
3191 SV *data_sv = av_pop (state);
3192 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3193
3194 errno = data->errorno;
3195 PL_laststype = data->laststype;
3196 PL_laststatval = data->laststatval;
3197 PL_statcache = data->statcache;
3198
3199 SvREFCNT_dec (data_sv);
1117 } 3200 }
1118 else 3201
3202 /* push result values */
3203 {
3204 dSP;
3205 int i;
3206
3207 EXTEND (SP, AvFILLp (state) + 1);
3208 for (i = 0; i <= AvFILLp (state); ++i)
3209 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3210
3211 PUTBACK;
3212 }
3213
1119 return 0; 3214 return 0;
1120} 3215}
1121 3216
1122static int 3217static void
1123api_cede_notself (void) 3218slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1124{ 3219{
1125 struct transfer_args ta; 3220 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3221 SV *coro_hv = SvRV (coro_current);
3222 struct coro *coro = SvSTATE_hv (coro_hv);
1126 3223
1127 if (prepare_cede_notself (&ta)) 3224 /* put our coroutine id on the state arg */
1128 { 3225 av_push (state, SvREFCNT_inc_NN (coro_hv));
1129 TRANSFER (ta); 3226
1130 return 1; 3227 /* first see whether we have a non-zero priority and set it as AIO prio */
3228 if (coro->prio)
1131 } 3229 {
1132 else 3230 dSP;
1133 return 0;
1134}
1135 3231
3232 static SV *prio_cv;
3233 static SV *prio_sv;
3234
3235 if (ecb_expect_false (!prio_cv))
3236 {
3237 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3238 prio_sv = newSViv (0);
3239 }
3240
3241 PUSHMARK (SP);
3242 sv_setiv (prio_sv, coro->prio);
3243 XPUSHs (prio_sv);
3244
3245 PUTBACK;
3246 call_sv (prio_cv, G_VOID | G_DISCARD);
3247 }
3248
3249 /* now call the original request */
3250 {
3251 dSP;
3252 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3253 int i;
3254
3255 PUSHMARK (SP);
3256
3257 /* first push all args to the stack */
3258 EXTEND (SP, items + 1);
3259
3260 for (i = 0; i < items; ++i)
3261 PUSHs (arg [i]);
3262
3263 /* now push the callback closure */
3264 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3265
3266 /* now call the AIO function - we assume our request is uncancelable */
3267 PUTBACK;
3268 call_sv ((SV *)req, G_VOID | G_DISCARD);
3269 }
3270
3271 /* now that the request is going, we loop till we have a result */
3272 frame->data = (void *)state;
3273 frame->prepare = prepare_schedule;
3274 frame->check = slf_check_aio_req;
3275}
3276
3277static void
3278coro_aio_req_xs (pTHX_ CV *cv)
3279{
3280 dXSARGS;
3281
3282 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3283
3284 XSRETURN_EMPTY;
3285}
3286
3287/*****************************************************************************/
3288
3289#if CORO_CLONE
3290# include "clone.c"
3291#endif
3292
3293/*****************************************************************************/
3294
3295static SV *
3296coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3297{
3298 SV *coro_sv;
3299 struct coro *coro;
3300 MAGIC *mg;
3301 HV *hv;
3302 SV *cb;
3303 int i;
3304
3305 if (argc > 0)
3306 {
3307 cb = s_get_cv_croak (argv [0]);
3308
3309 if (!is_coro)
3310 {
3311 if (CvISXSUB (cb))
3312 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3313
3314 if (!CvROOT (cb))
3315 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3316 }
3317 }
3318
3319 Newz (0, coro, 1, struct coro);
3320 coro->args = newAV ();
3321 coro->flags = CF_NEW;
3322
3323 if (coro_first) coro_first->prev = coro;
3324 coro->next = coro_first;
3325 coro_first = coro;
3326
3327 coro->hv = hv = newHV ();
3328 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3329 mg->mg_flags |= MGf_DUP;
3330 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3331
3332 if (argc > 0)
3333 {
3334 av_extend (coro->args, argc + is_coro - 1);
3335
3336 if (is_coro)
3337 {
3338 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3339 cb = (SV *)cv_coro_run;
3340 }
3341
3342 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3343
3344 for (i = 1; i < argc; i++)
3345 av_push (coro->args, newSVsv (argv [i]));
3346 }
3347
3348 return coro_sv;
3349}
3350
3351#ifndef __cplusplus
3352ecb_cold XS(boot_Coro__State);
3353#endif
3354
3355#if CORO_JIT
3356
3357static void ecb_noinline ecb_cold
3358pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3359{
3360 dSP;
3361 AV *av = newAV ();
3362
3363 av_store (av, 3, newSVuv (d));
3364 av_store (av, 2, newSVuv (c));
3365 av_store (av, 1, newSVuv (b));
3366 av_store (av, 0, newSVuv (a));
3367
3368 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3369
3370 PUTBACK;
3371}
3372
3373static void ecb_noinline ecb_cold
3374jit_init (pTHX)
3375{
3376 dSP;
3377 SV *load, *save;
3378 char *map_base;
3379 char *load_ptr, *save_ptr;
3380 STRLEN load_len, save_len, map_len;
3381 int count;
3382
3383 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3384
3385 PUSHMARK (SP);
3386#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3387# include "state.h"
3388#undef VARx
3389 count = call_pv ("Coro::State::_jit", G_ARRAY);
3390 SPAGAIN;
3391
3392 save = POPs; save_ptr = SvPVbyte (save, save_len);
3393 load = POPs; load_ptr = SvPVbyte (load, load_len);
3394
3395 map_len = load_len + save_len + 16;
3396
3397 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3398
3399 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3400
3401 load_perl_slots = (load_save_perl_slots_type)map_base;
3402 memcpy (map_base, load_ptr, load_len);
3403
3404 map_base += (load_len + 15) & ~15;
3405
3406 save_perl_slots = (load_save_perl_slots_type)map_base;
3407 memcpy (map_base, save_ptr, save_len);
3408
3409 /* we are good citizens and try to make the page read-only, so the evil evil */
3410 /* hackers might have it a bit more difficult */
3411 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3412
3413 PUTBACK;
3414 eval_pv ("undef &Coro::State::_jit", 1);
3415}
3416
3417#endif
3418
1136MODULE = Coro::State PACKAGE = Coro::State 3419MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1137 3420
1138PROTOTYPES: DISABLE 3421PROTOTYPES: DISABLE
1139 3422
1140BOOT: 3423BOOT:
1141{ 3424{
1142#ifdef USE_ITHREADS 3425#ifdef USE_ITHREADS
1143 MUTEX_INIT (&coro_mutex); 3426# if CORO_PTHREAD
3427 coro_thx = PERL_GET_CONTEXT;
3428# endif
1144#endif 3429#endif
1145 BOOT_PAGESIZE; 3430 BOOT_PAGESIZE;
1146 3431
3432 /* perl defines these to check for existance first, but why it doesn't */
3433 /* just create them one at init time is not clear to me, except for */
3434 /* programs trying to delete them, but... */
3435 /* anyway, we declare this as invalid and make sure they are initialised here */
3436 DEFSV;
3437 ERRSV;
3438
3439 cctx_current = cctx_new_empty ();
3440
3441 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3442 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3443
3444 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3445 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3446 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3447
3448 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3449 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3450 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3451
1147 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3452 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1148 3453
3454 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3455 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1149 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3456 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1150 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1152 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1153 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3457 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1154 3458
1155 main_mainstack = PL_mainstack; 3459 main_mainstack = PL_mainstack;
3460 main_top_env = PL_top_env;
1156 3461
3462 while (main_top_env->je_prev)
3463 main_top_env = main_top_env->je_prev;
3464
3465 {
3466 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3467
3468 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3469 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3470
3471 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3472 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3473 }
3474
1157 coroapi.ver = CORO_API_VERSION; 3475 coroapi.ver = CORO_API_VERSION;
3476 coroapi.rev = CORO_API_REVISION;
3477
1158 coroapi.transfer = api_transfer; 3478 coroapi.transfer = api_transfer;
1159 3479
3480 coroapi.sv_state = SvSTATE_;
3481 coroapi.execute_slf = api_execute_slf;
3482 coroapi.prepare_nop = prepare_nop;
3483 coroapi.prepare_schedule = prepare_schedule;
3484 coroapi.prepare_cede = prepare_cede;
3485 coroapi.prepare_cede_notself = prepare_cede_notself;
3486
3487 time_init (aTHX);
3488
1160 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3489 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3490#if CORO_JIT
3491 PUTBACK;
3492 jit_init (aTHX);
3493 SPAGAIN;
3494#endif
1161} 3495}
1162 3496
1163SV * 3497SV *
1164new (char *klass, ...) 3498new (SV *klass, ...)
3499 ALIAS:
3500 Coro::new = 1
1165 CODE: 3501 CODE:
1166{ 3502 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1167 struct coro *coro;
1168 HV *hv;
1169 int i;
1170
1171 Newz (0, coro, 1, struct coro);
1172 coro->args = newAV ();
1173 coro->save = CORO_SAVE_ALL;
1174 coro->flags = CF_NEW;
1175
1176 hv = newHV ();
1177 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1178 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1179
1180 for (i = 1; i < items; i++)
1181 av_push (coro->args, newSVsv (ST (i)));
1182}
1183 OUTPUT:
1184 RETVAL
1185
1186int
1187save (SV *coro, int new_save = -1)
1188 CODE:
1189 RETVAL = api_save (coro, new_save);
1190 OUTPUT: 3503 OUTPUT:
1191 RETVAL 3504 RETVAL
1192 3505
1193void 3506void
1194_set_stacklevel (...) 3507transfer (...)
1195 ALIAS: 3508 PROTOTYPE: $$
1196 Coro::State::transfer = 1
1197 Coro::schedule = 2
1198 Coro::cede = 3
1199 Coro::cede_notself = 4
1200 CODE:
1201{
1202 struct transfer_args ta;
1203
1204 switch (ix)
1205 {
1206 case 0:
1207 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1208 ta.next = 0;
1209 break;
1210
1211 case 1:
1212 if (items != 2)
1213 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1214
1215 prepare_transfer (&ta, ST (0), ST (1));
1216 break;
1217
1218 case 2:
1219 prepare_schedule (&ta);
1220 break;
1221
1222 case 3:
1223 prepare_cede (&ta);
1224 break;
1225
1226 case 4:
1227 if (!prepare_cede_notself (&ta))
1228 XSRETURN_EMPTY;
1229
1230 break;
1231 }
1232
1233 BARRIER;
1234 TRANSFER (ta);
1235
1236 if (GIMME_V != G_VOID && ta.next != ta.prev)
1237 XSRETURN_YES;
1238}
1239
1240bool
1241_destroy (SV *coro_sv)
1242 CODE: 3509 CODE:
1243 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 3510 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1244 OUTPUT:
1245 RETVAL
1246 3511
1247void 3512void
1248_exit (code) 3513_exit (int code)
1249 int code
1250 PROTOTYPE: $ 3514 PROTOTYPE: $
1251 CODE: 3515 CODE:
1252 _exit (code); 3516 _exit (code);
1253 3517
3518SV *
3519clone (Coro::State coro)
3520 CODE:
3521{
3522#if CORO_CLONE
3523 struct coro *ncoro = coro_clone (aTHX_ coro);
3524 MAGIC *mg;
3525 /* TODO: too much duplication */
3526 ncoro->hv = newHV ();
3527 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3528 mg->mg_flags |= MGf_DUP;
3529 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3530#else
3531 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3532#endif
3533}
3534 OUTPUT:
3535 RETVAL
3536
3537int
3538cctx_stacksize (int new_stacksize = 0)
3539 PROTOTYPE: ;$
3540 CODE:
3541 RETVAL = cctx_stacksize;
3542 if (new_stacksize)
3543 {
3544 cctx_stacksize = new_stacksize;
3545 ++cctx_gen;
3546 }
3547 OUTPUT:
3548 RETVAL
3549
3550int
3551cctx_max_idle (int max_idle = 0)
3552 PROTOTYPE: ;$
3553 CODE:
3554 RETVAL = cctx_max_idle;
3555 if (max_idle > 1)
3556 cctx_max_idle = max_idle;
3557 OUTPUT:
3558 RETVAL
3559
1254int 3560int
1255cctx_count () 3561cctx_count ()
3562 PROTOTYPE:
1256 CODE: 3563 CODE:
1257 RETVAL = cctx_count; 3564 RETVAL = cctx_count;
1258 OUTPUT: 3565 OUTPUT:
1259 RETVAL 3566 RETVAL
1260 3567
1261int 3568int
1262cctx_idle () 3569cctx_idle ()
3570 PROTOTYPE:
1263 CODE: 3571 CODE:
1264 RETVAL = cctx_idle; 3572 RETVAL = cctx_idle;
1265 OUTPUT: 3573 OUTPUT:
1266 RETVAL 3574 RETVAL
1267 3575
3576void
3577list ()
3578 PROTOTYPE:
3579 PPCODE:
3580{
3581 struct coro *coro;
3582 for (coro = coro_first; coro; coro = coro->next)
3583 if (coro->hv)
3584 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3585}
3586
3587void
3588call (Coro::State coro, SV *coderef)
3589 ALIAS:
3590 eval = 1
3591 CODE:
3592{
3593 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3594 {
3595 struct coro *current = SvSTATE_current;
3596 struct CoroSLF slf_save;
3597
3598 if (current != coro)
3599 {
3600 PUTBACK;
3601 save_perl (aTHX_ current);
3602 load_perl (aTHX_ coro);
3603 /* the coro is most likely in an active SLF call.
3604 * while not strictly required (the code we execute is
3605 * not allowed to call any SLF functions), it's cleaner
3606 * to reinitialise the slf_frame and restore it later.
3607 * This might one day allow us to actually do SLF calls
3608 * from code executed here.
3609 */
3610 slf_save = slf_frame;
3611 slf_frame.prepare = 0;
3612 SPAGAIN;
3613 }
3614
3615 PUSHSTACK;
3616
3617 PUSHMARK (SP);
3618 PUTBACK;
3619
3620 if (ix)
3621 eval_sv (coderef, 0);
3622 else
3623 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3624
3625 POPSTACK;
3626 SPAGAIN;
3627
3628 if (current != coro)
3629 {
3630 PUTBACK;
3631 slf_frame = slf_save;
3632 save_perl (aTHX_ coro);
3633 load_perl (aTHX_ current);
3634 SPAGAIN;
3635 }
3636 }
3637}
3638
3639SV *
3640is_ready (Coro::State coro)
3641 PROTOTYPE: $
3642 ALIAS:
3643 is_ready = CF_READY
3644 is_running = CF_RUNNING
3645 is_new = CF_NEW
3646 is_destroyed = CF_ZOMBIE
3647 is_zombie = CF_ZOMBIE
3648 is_suspended = CF_SUSPENDED
3649 CODE:
3650 RETVAL = boolSV (coro->flags & ix);
3651 OUTPUT:
3652 RETVAL
3653
3654void
3655throw (Coro::State self, SV *exception = &PL_sv_undef)
3656 PROTOTYPE: $;$
3657 CODE:
3658{
3659 struct coro *current = SvSTATE_current;
3660 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3661 SvREFCNT_dec (*exceptionp);
3662 SvGETMAGIC (exception);
3663 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3664}
3665
3666void
3667api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3668 PROTOTYPE: $;$
3669 C_ARGS: aTHX_ coro, flags
3670
3671SV *
3672has_cctx (Coro::State coro)
3673 PROTOTYPE: $
3674 CODE:
3675 /* maybe manage the running flag differently */
3676 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3677 OUTPUT:
3678 RETVAL
3679
3680int
3681is_traced (Coro::State coro)
3682 PROTOTYPE: $
3683 CODE:
3684 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3685 OUTPUT:
3686 RETVAL
3687
3688UV
3689rss (Coro::State coro)
3690 PROTOTYPE: $
3691 ALIAS:
3692 usecount = 1
3693 CODE:
3694 switch (ix)
3695 {
3696 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3697 case 1: RETVAL = coro->usecount; break;
3698 }
3699 OUTPUT:
3700 RETVAL
3701
3702void
3703force_cctx ()
3704 PROTOTYPE:
3705 CODE:
3706 cctx_current->idle_sp = 0;
3707
3708void
3709swap_defsv (Coro::State self)
3710 PROTOTYPE: $
3711 ALIAS:
3712 swap_defav = 1
3713 CODE:
3714 if (!self->slot)
3715 croak ("cannot swap state with coroutine that has no saved state,");
3716 else
3717 {
3718 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3719 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3720
3721 SV *tmp = *src; *src = *dst; *dst = tmp;
3722 }
3723
3724void
3725cancel (Coro::State self)
3726 CODE:
3727 coro_state_destroy (aTHX_ self);
3728
3729SV *
3730enable_times (int enabled = enable_times)
3731 CODE:
3732{
3733 RETVAL = boolSV (enable_times);
3734
3735 if (enabled != enable_times)
3736 {
3737 enable_times = enabled;
3738
3739 coro_times_update ();
3740 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3741 }
3742}
3743 OUTPUT:
3744 RETVAL
3745
3746void
3747times (Coro::State self)
3748 PPCODE:
3749{
3750 struct coro *current = SvSTATE (coro_current);
3751
3752 if (ecb_expect_false (current == self))
3753 {
3754 coro_times_update ();
3755 coro_times_add (SvSTATE (coro_current));
3756 }
3757
3758 EXTEND (SP, 2);
3759 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3760 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3761
3762 if (ecb_expect_false (current == self))
3763 coro_times_sub (SvSTATE (coro_current));
3764}
3765
3766void
3767swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3768 CODE:
3769{
3770 struct coro *current = SvSTATE_current;
3771
3772 if (current == coro)
3773 SWAP_SVS (current);
3774
3775 if (!coro->swap_sv)
3776 coro->swap_sv = newAV ();
3777
3778 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3779 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3780
3781 if (current == coro)
3782 SWAP_SVS (current);
3783}
3784
3785
1268MODULE = Coro::State PACKAGE = Coro 3786MODULE = Coro::State PACKAGE = Coro
1269 3787
1270BOOT: 3788BOOT:
1271{ 3789{
1272 int i; 3790 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3791 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3792 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3793 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3794 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3795 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3796 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3797 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1273 3798
3799 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3800 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3801 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3802 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3803
1274 coro_stash = gv_stashpv ("Coro", TRUE); 3804 coro_stash = gv_stashpv ("Coro", TRUE);
1275 3805
1276 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3806 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1277 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3807 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1278 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3808 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1279 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3809 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1280 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3810 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1281 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3811 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1282
1283 coro_current = get_sv ("Coro::current", FALSE);
1284 SvREADONLY_on (coro_current);
1285
1286 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1287 coro_ready[i] = newAV ();
1288 3812
1289 { 3813 {
1290 SV *sv = perl_get_sv("Coro::API", 1); 3814 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1291 3815
1292 coroapi.schedule = api_schedule; 3816 coroapi.schedule = api_schedule;
1293 coroapi.save = api_save; 3817 coroapi.schedule_to = api_schedule_to;
1294 coroapi.cede = api_cede; 3818 coroapi.cede = api_cede;
1295 coroapi.cede_notself = api_cede_notself; 3819 coroapi.cede_notself = api_cede_notself;
1296 coroapi.ready = api_ready; 3820 coroapi.ready = api_ready;
1297 coroapi.is_ready = api_is_ready; 3821 coroapi.is_ready = api_is_ready;
1298 coroapi.nready = &coro_nready; 3822 coroapi.nready = coro_nready;
1299 coroapi.current = coro_current; 3823 coroapi.current = coro_current;
1300 3824
1301 GCoroAPI = &coroapi; 3825 /*GCoroAPI = &coroapi;*/
1302 sv_setiv (sv, (IV)&coroapi); 3826 sv_setiv (sv, (IV)&coroapi);
1303 SvREADONLY_on (sv); 3827 SvREADONLY_on (sv);
1304 } 3828 }
1305} 3829}
3830
3831SV *
3832async (...)
3833 PROTOTYPE: &@
3834 CODE:
3835 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3836 api_ready (aTHX_ RETVAL);
3837 OUTPUT:
3838 RETVAL
3839
3840void
3841_destroy (Coro::State coro)
3842 CODE:
3843 /* used by the manager thread */
3844 coro_state_destroy (aTHX_ coro);
3845
3846void
3847on_destroy (Coro::State coro, SV *cb)
3848 CODE:
3849 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3850
3851void
3852join (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_join);
3855
3856void
3857terminate (...)
3858 CODE:
3859 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3860
3861void
3862cancel (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3865
3866int
3867safe_cancel (Coro::State self, ...)
3868 C_ARGS: aTHX_ self, &ST (1), items - 1
3869
3870void
3871schedule (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3874
3875void
3876schedule_to (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3879
3880void
3881cede_to (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3884
3885void
3886cede (...)
3887 CODE:
3888 CORO_EXECUTE_SLF_XS (slf_init_cede);
3889
3890void
3891cede_notself (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1306 3894
1307void 3895void
1308_set_current (SV *current) 3896_set_current (SV *current)
1309 PROTOTYPE: $ 3897 PROTOTYPE: $
1310 CODE: 3898 CODE:
1311 SvREFCNT_dec (SvRV (coro_current)); 3899 SvREFCNT_dec (SvRV (coro_current));
1312 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3900 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3901
3902void
3903_set_readyhook (SV *hook)
3904 PROTOTYPE: $
3905 CODE:
3906 SvREFCNT_dec (coro_readyhook);
3907 SvGETMAGIC (hook);
3908 if (SvOK (hook))
3909 {
3910 coro_readyhook = newSVsv (hook);
3911 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3912 }
3913 else
3914 {
3915 coro_readyhook = 0;
3916 CORO_READYHOOK = 0;
3917 }
1313 3918
1314int 3919int
1315prio (Coro::State coro, int newprio = 0) 3920prio (Coro::State coro, int newprio = 0)
3921 PROTOTYPE: $;$
1316 ALIAS: 3922 ALIAS:
1317 nice = 1 3923 nice = 1
1318 CODE: 3924 CODE:
1319{ 3925{
1320 RETVAL = coro->prio; 3926 RETVAL = coro->prio;
… …
1322 if (items > 1) 3928 if (items > 1)
1323 { 3929 {
1324 if (ix) 3930 if (ix)
1325 newprio = coro->prio - newprio; 3931 newprio = coro->prio - newprio;
1326 3932
1327 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3933 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1328 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3934 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1329 3935
1330 coro->prio = newprio; 3936 coro->prio = newprio;
1331 } 3937 }
1332} 3938}
1333 OUTPUT: 3939 OUTPUT:
… …
1335 3941
1336SV * 3942SV *
1337ready (SV *self) 3943ready (SV *self)
1338 PROTOTYPE: $ 3944 PROTOTYPE: $
1339 CODE: 3945 CODE:
1340 RETVAL = boolSV (api_ready (self)); 3946 RETVAL = boolSV (api_ready (aTHX_ self));
1341 OUTPUT:
1342 RETVAL
1343
1344SV *
1345is_ready (SV *self)
1346 PROTOTYPE: $
1347 CODE:
1348 RETVAL = boolSV (api_is_ready (self));
1349 OUTPUT: 3947 OUTPUT:
1350 RETVAL 3948 RETVAL
1351 3949
1352int 3950int
1353nready (...) 3951nready (...)
… …
1355 CODE: 3953 CODE:
1356 RETVAL = coro_nready; 3954 RETVAL = coro_nready;
1357 OUTPUT: 3955 OUTPUT:
1358 RETVAL 3956 RETVAL
1359 3957
1360MODULE = Coro::State PACKAGE = Coro::AIO 3958void
3959suspend (Coro::State self)
3960 PROTOTYPE: $
3961 CODE:
3962 self->flags |= CF_SUSPENDED;
3963
3964void
3965resume (Coro::State self)
3966 PROTOTYPE: $
3967 CODE:
3968 self->flags &= ~CF_SUSPENDED;
3969
3970void
3971_pool_handler (...)
3972 CODE:
3973 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3974
3975void
3976async_pool (SV *cv, ...)
3977 PROTOTYPE: &@
3978 PPCODE:
3979{
3980 HV *hv = (HV *)av_pop (av_async_pool);
3981 AV *av = newAV ();
3982 SV *cb = ST (0);
3983 int i;
3984
3985 av_extend (av, items - 2);
3986 for (i = 1; i < items; ++i)
3987 av_push (av, SvREFCNT_inc_NN (ST (i)));
3988
3989 if ((SV *)hv == &PL_sv_undef)
3990 {
3991 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3992 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3993 SvREFCNT_dec (sv);
3994 }
3995
3996 {
3997 struct coro *coro = SvSTATE_hv (hv);
3998
3999 assert (!coro->invoke_cb);
4000 assert (!coro->invoke_av);
4001 coro->invoke_cb = SvREFCNT_inc (cb);
4002 coro->invoke_av = av;
4003 }
4004
4005 api_ready (aTHX_ (SV *)hv);
4006
4007 if (GIMME_V != G_VOID)
4008 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4009 else
4010 SvREFCNT_dec (hv);
4011}
1361 4012
1362SV * 4013SV *
1363_get_state () 4014rouse_cb ()
4015 PROTOTYPE:
1364 CODE: 4016 CODE:
1365{ 4017 RETVAL = coro_new_rouse_cb (aTHX);
1366 struct io_state *data;
1367
1368 RETVAL = newSV (sizeof (struct io_state));
1369 data = (struct io_state *)SvPVX (RETVAL);
1370 SvCUR_set (RETVAL, sizeof (struct io_state));
1371 SvPOK_only (RETVAL);
1372
1373 data->errorno = errno;
1374 data->laststype = PL_laststype;
1375 data->laststatval = PL_laststatval;
1376 data->statcache = PL_statcache;
1377}
1378 OUTPUT: 4018 OUTPUT:
1379 RETVAL 4019 RETVAL
1380 4020
1381void 4021void
1382_set_state (char *data_) 4022rouse_wait (...)
4023 PROTOTYPE: ;$
4024 PPCODE:
4025 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4026
4027void
4028on_enter (SV *block)
4029 ALIAS:
4030 on_leave = 1
1383 PROTOTYPE: $ 4031 PROTOTYPE: &
1384 CODE: 4032 CODE:
1385{ 4033{
1386 struct io_state *data = (void *)data_; 4034 struct coro *coro = SvSTATE_current;
4035 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1387 4036
1388 errno = data->errorno; 4037 block = s_get_cv_croak (block);
1389 PL_laststype = data->laststype;
1390 PL_laststatval = data->laststatval;
1391 PL_statcache = data->statcache;
1392}
1393 4038
4039 if (!*avp)
4040 *avp = newAV ();
4041
4042 av_push (*avp, SvREFCNT_inc (block));
4043
4044 if (!ix)
4045 on_enterleave_call (aTHX_ block);
4046
4047 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4048 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4049 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4050}
4051
4052
4053MODULE = Coro::State PACKAGE = PerlIO::cede
4054
4055BOOT:
4056 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4057
4058
4059MODULE = Coro::State PACKAGE = Coro::Semaphore
4060
4061SV *
4062new (SV *klass, SV *count = 0)
4063 CODE:
4064{
4065 int semcnt = 1;
4066
4067 if (count)
4068 {
4069 SvGETMAGIC (count);
4070
4071 if (SvOK (count))
4072 semcnt = SvIV (count);
4073 }
4074
4075 RETVAL = sv_bless (
4076 coro_waitarray_new (aTHX_ semcnt),
4077 GvSTASH (CvGV (cv))
4078 );
4079}
4080 OUTPUT:
4081 RETVAL
4082
4083# helper for Coro::Channel and others
4084SV *
4085_alloc (int count)
4086 CODE:
4087 RETVAL = coro_waitarray_new (aTHX_ count);
4088 OUTPUT:
4089 RETVAL
4090
4091SV *
4092count (SV *self)
4093 CODE:
4094 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4095 OUTPUT:
4096 RETVAL
4097
4098void
4099up (SV *self, int adjust = 1)
4100 ALIAS:
4101 adjust = 1
4102 CODE:
4103 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4104
4105void
4106down (...)
4107 CODE:
4108 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4109
4110void
4111wait (...)
4112 CODE:
4113 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4114
4115void
4116try (SV *self)
4117 PPCODE:
4118{
4119 AV *av = (AV *)SvRV (self);
4120 SV *count_sv = AvARRAY (av)[0];
4121 IV count = SvIVX (count_sv);
4122
4123 if (count > 0)
4124 {
4125 --count;
4126 SvIVX (count_sv) = count;
4127 XSRETURN_YES;
4128 }
4129 else
4130 XSRETURN_NO;
4131}
4132
4133void
4134waiters (SV *self)
4135 PPCODE:
4136{
4137 AV *av = (AV *)SvRV (self);
4138 int wcount = AvFILLp (av) + 1 - 1;
4139
4140 if (GIMME_V == G_SCALAR)
4141 XPUSHs (sv_2mortal (newSViv (wcount)));
4142 else
4143 {
4144 int i;
4145 EXTEND (SP, wcount);
4146 for (i = 1; i <= wcount; ++i)
4147 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4148 }
4149}
4150
4151MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4152
4153void
4154_may_delete (SV *sem, int count, unsigned int extra_refs)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (sem);
4158
4159 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4160 && AvFILLp (av) == 0 /* no waiters, just count */
4161 && SvIV (AvARRAY (av)[0]) == count)
4162 XSRETURN_YES;
4163
4164 XSRETURN_NO;
4165}
4166
4167MODULE = Coro::State PACKAGE = Coro::Signal
4168
4169SV *
4170new (SV *klass)
4171 CODE:
4172 RETVAL = sv_bless (
4173 coro_waitarray_new (aTHX_ 0),
4174 GvSTASH (CvGV (cv))
4175 );
4176 OUTPUT:
4177 RETVAL
4178
4179void
4180wait (...)
4181 CODE:
4182 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4183
4184void
4185broadcast (SV *self)
4186 CODE:
4187{
4188 AV *av = (AV *)SvRV (self);
4189 coro_signal_wake (aTHX_ av, AvFILLp (av));
4190}
4191
4192void
4193send (SV *self)
4194 CODE:
4195{
4196 AV *av = (AV *)SvRV (self);
4197
4198 if (AvFILLp (av))
4199 coro_signal_wake (aTHX_ av, 1);
4200 else
4201 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4202}
4203
4204IV
4205awaited (SV *self)
4206 CODE:
4207 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4208 OUTPUT:
4209 RETVAL
4210
4211
4212MODULE = Coro::State PACKAGE = Coro::AnyEvent
4213
4214BOOT:
4215 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4216
4217void
4218_schedule (...)
4219 CODE:
4220{
4221 static int incede;
4222
4223 api_cede_notself (aTHX);
4224
4225 ++incede;
4226 while (coro_nready >= incede && api_cede (aTHX))
4227 ;
4228
4229 sv_setsv (sv_activity, &PL_sv_undef);
4230 if (coro_nready >= incede)
4231 {
4232 PUSHMARK (SP);
4233 PUTBACK;
4234 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4235 }
4236
4237 --incede;
4238}
4239
4240
4241MODULE = Coro::State PACKAGE = Coro::AIO
4242
4243void
4244_register (char *target, char *proto, SV *req)
4245 CODE:
4246{
4247 SV *req_cv = s_get_cv_croak (req);
4248 /* newXSproto doesn't return the CV on 5.8 */
4249 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4250 sv_setpv ((SV *)slf_cv, proto);
4251 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4252}
4253
4254MODULE = Coro::State PACKAGE = Coro::Select
4255
4256void
4257patch_pp_sselect ()
4258 CODE:
4259 if (!coro_old_pp_sselect)
4260 {
4261 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4262 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4263 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4264 }
4265
4266void
4267unpatch_pp_sselect ()
4268 CODE:
4269 if (coro_old_pp_sselect)
4270 {
4271 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4272 coro_old_pp_sselect = 0;
4273 }
4274

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