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Comparing Coro/Coro/State.xs (file contents):
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs.
Revision 1.415 by root, Tue Aug 30 07:48:53 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
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
17#include "ecb.h"
6 18
19#include <stddef.h>
7#include <signal.h> 20#include <stdio.h>
21#include <errno.h>
22#include <assert.h>
8 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
9#ifdef HAVE_MMAP 38#if HAVE_MMAP
10# include <unistd.h> 39# include <unistd.h>
11# include <sys/mman.h> 40# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 42# ifdef MAP_ANON
43# define MAP_ANONYMOUS MAP_ANON
15# else 44# else
16# undef HAVE_MMAP 45# undef HAVE_MMAP
17# endif 46# endif
18# endif 47# endif
48# include <limits.h>
49# ifndef PAGESIZE
50# define PAGESIZE pagesize
51# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
52static long pagesize;
53# else
54# define BOOT_PAGESIZE (void)0
19#endif 55# endif
56#else
57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
59#endif
20 60
21#define MAY_FLUSH /* increases codesize and is rarely used */ 61#if CORO_USE_VALGRIND
62# include <valgrind/valgrind.h>
63#endif
22 64
23#define SUB_INIT "Coro::State::initialize" 65/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 66static int cctx_max_idle = 4;
25 67
26/* The next macro should declare a variable stacklevel that contains and approximation 68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
27 * to the current C stack pointer. Its property is that it changes with each call 69# define HAS_SCOPESTACK_NAME 1
28 * and should be unique. */ 70#endif
71
72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
73# undef CORO_STACKGUARD
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
29#define dSTACKLEVEL void *stacklevel = &stacklevel 92# define STACKLEVEL ((void *)&stacklevel)
93#endif
30 94
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 95#define IN_DESTRUCT PL_dirty
32 96
33#include "CoroAPI.h" 97#include "CoroAPI.h"
98#define GCoroAPI (&coroapi) /* very sneaky */
34 99
100#ifdef USE_ITHREADS
101# if CORO_PTHREAD
102static void *coro_thx;
103# endif
104#endif
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
116# endif
117#endif
118
119static double (*nvtime)(); /* so why doesn't it take void? */
120static void (*u2time)(pTHX_ UV ret[2]);
121
122/* we hijack an hopefully unused CV flag for our purposes */
123#define CVf_SLF 0x4000
124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
126
127static U32 cctx_gen;
128static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
130static AV *main_mainstack; /* used to differentiate between $main and others */
131static JMPENV *main_top_env;
132static HV *coro_state_stash, *coro_stash;
133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 134
37/* this is actually not only the c stack but also c registers etc... */ 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;
161
162static struct coro_cctx *cctx_first;
163static int cctx_count, cctx_idle;
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
175/* this is a structure representing a c-level coroutine */
38typedef struct { 176typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 177{
40 int usecnt; /* shared by how many coroutines */ 178 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 179
180 /* the stack */
181 void *sptr;
182 size_t ssize;
183
184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
187 JMPENV *top_env;
43 coro_context cctx; 188 coro_context cctx;
44 189
45 void *sptr; 190 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 191#if CORO_USE_VALGRIND
47} coro_stack; 192 int valgrind_id;
193#endif
194 unsigned char flags;
195} coro_cctx;
48 196
197static coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201static MGVTBL coro_state_vtbl;
202
203enum
204{
205 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */
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) */
211};
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
224/* this is a structure representing a perl-level coroutine */
49struct coro { 225struct coro
50 /* the optional C context */ 226{
51 coro_stack *stack; 227 /* the C coroutine allocated to this perl coroutine, if any */
52 void *cursp; 228 coro_cctx *cctx;
53 int gencnt;
54 229
55 /* optionally saved, might be zero */ 230 /* ready queue */
56 AV *defav; 231 struct coro *next_ready;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63 232
64 /* the stacks and related info (callchain etc..) */ 233 /* state data */
65 PERL_SI *curstackinfo; 234 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 235 AV *mainstack;
68 SV **stack_sp; 236 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 237
238 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 239 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 240 int flags; /* CF_ flags */
241 HV *hv; /* the perl hash associated with this coro, if any */
242
243 /* statistics */
244 int usecount; /* number of transfers to this coro */
245
246 /* coro process data */
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;
94}; 270};
95 271
96typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
98 274
99static AV *main_mainstack; /* used to differentiate between $main and others */ 275/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 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
280/** Coro ********************************************************************/
281
282#define CORO_PRIO_MAX 3
283#define CORO_PRIO_HIGH 1
284#define CORO_PRIO_NORMAL 0
285#define CORO_PRIO_LOW -1
286#define CORO_PRIO_IDLE -3
287#define CORO_PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
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);
101static SV *ucoro_state_sv; 323static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 324
105/* mostly copied from op.c:cv_clone2 */ 325/* horrible hack, but if it works... */
106STATIC AV * 326static OP *
107clone_padlist (AV *protopadlist) 327coro_pp_sselect (pTHX)
108{ 328{
109 AV *av; 329 dSP;
110 I32 ix; 330 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 331 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 332 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 333
114 SV **ppad = AvARRAY (protopad); 334 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 335 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 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
391
392/** lowlevel stuff **********************************************************/
393
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 *
530coro_derive_padlist (pTHX_ CV *cv)
531{
532 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 533 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 534
128 newpadlist = newAV (); 535 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 536 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 537#if PERL_VERSION_ATLEAST (5,10,0)
538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
539#else
540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
541#endif
542 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
543 --AvFILLp (padlist);
544
545 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 546 av_store (newpadlist, 1, (SV *)newpad);
132 547
133 av = newAV (); /* will be @_ */ 548 return newpadlist;
134 av_extend (av, 0); 549}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 550
138 for (ix = fpad; ix > 0; ix--) 551ecb_inline void
552free_padlist (pTHX_ AV *padlist)
553{
554 /* may be during global destruction */
555 if (!IN_DESTRUCT)
139 { 556 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 557 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 558
559 while (i > 0) /* special-case index 0 */
142 { 560 {
143 char *name = SvPVX (namesv); /* XXX */ 561 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 562 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 563 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 564
147 } 565 while (j >= 0)
148 else 566 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 567
150 SV *sv; 568 AvFILLp (av) = -1;
151 if (*name == '&') 569 SvREFCNT_dec (av);
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 } 570 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175 571
176#if 0 /* return -ENOTUNDERSTOOD */ 572 SvREFCNT_dec (AvARRAY (padlist)[0]);
177 /* Now that vars are all in place, clone nested closures. */
178 573
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist); 574 AvFILLp (padlist) = -1;
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist); 575 SvREFCNT_dec ((SV*)padlist);
216 } 576 }
217} 577}
218#endif 578
579static int
580coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
581{
582 AV *padlist;
583 AV *av = (AV *)mg->mg_obj;
584
585 /* perl manages to free our internal AV and _then_ call us */
586 if (IN_DESTRUCT)
587 return 0;
588
589 /* casting is fun. */
590 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
591 free_padlist (aTHX_ padlist);
592
593 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
594
595 return 0;
596}
597
598static MGVTBL coro_cv_vtbl = {
599 0, 0, 0, 0,
600 coro_cv_free
601};
219 602
220/* the next two functions merely cache the padlists */ 603/* the next two functions merely cache the padlists */
221STATIC void 604ecb_inline void
222get_padlist (CV *cv) 605get_padlist (pTHX_ CV *cv)
223{ 606{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 607 MAGIC *mg = CORO_MAGIC_cv (cv);
608 AV *av;
225 609
226 if (he && AvFILLp ((AV *)*he) >= 0) 610 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 611 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
228 else 612 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 { 613 {
614#if CORO_PREFER_PERL_FUNCTIONS
615 /* this is probably cleaner? but also slower! */
616 /* in practise, it seems to be less stable */
617 CV *cp = Perl_cv_clone (aTHX_ cv);
618 CvPADLIST (cv) = CvPADLIST (cp);
619 CvPADLIST (cp) = 0;
239 SvREFCNT_dec (*he); 620 SvREFCNT_dec (cp);
240 *he = (SV *)newAV (); 621#else
622 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
623#endif
241 } 624 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 625}
245 626
246#ifdef MAY_FLUSH 627ecb_inline void
247STATIC void 628put_padlist (pTHX_ CV *cv)
248flush_padlist_cache ()
249{ 629{
250 HV *hv = padlist_cache; 630 MAGIC *mg = CORO_MAGIC_cv (cv);
251 padlist_cache = newHV (); 631 AV *av;
252 632
253 if (hv_iterinit (hv)) 633 if (ecb_expect_false (!mg))
254 { 634 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 HE *he;
256 AV *padlist;
257 635
258 while (!!(he = hv_iternext (hv))) 636 av = (AV *)mg->mg_obj;
637
638 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
639 av_extend (av, AvFILLp (av) + 1);
640
641 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
642}
643
644/** load & save, init *******************************************************/
645
646/* swap sv heads, at least logically */
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 */
259 { 673 {
260 AV *av = (AV *)HeVAL(he); 674 /* swap sv_u */
675 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
261 676
262 /* casting is fun. */ 677 /* if SvANY points to the head, we need to adjust the pointers,
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 678 * as the pointer for a still points to b, and maybe vice versa.
264 free_padlist (padlist); 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);
265 } 688 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif 689#endif
690 }
691}
271 692
272#define SB do { 693#define SWAP_SVS(coro) \
273#define SE } while (0) 694 if (ecb_expect_false ((coro)->swap_sv)) \
695 swap_svs (aTHX_ (coro))
274 696
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void 697static void
698on_enterleave_call (pTHX_ SV *cb);
699
700static void
281load_state(pTHX_ Coro__State c) 701load_perl (pTHX_ Coro__State c)
282{ 702{
283 PL_dowarn = c->dowarn; 703 perl_slots *slot = c->slot;
284 PL_in_eval = c->in_eval; 704 c->slot = 0;
285 705
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 706 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 707
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 708#if CORO_JIT
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 709 load_perl_slots (slot);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 710#else
711 #define VARx(name,expr,type) expr = slot->name;
712 # include "state.h"
713 #undef VARx
714#endif
316 715
317 { 716 {
318 dSP; 717 dSP;
718
319 CV *cv; 719 CV *cv;
320 720
321 /* now do the ugly restore mess */ 721 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 722 while (ecb_expect_true (cv = (CV *)POPs))
323 { 723 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 724 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 725 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 726 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 727 }
337 728
338 PUTBACK; 729 PUTBACK;
339 } 730 }
340}
341 731
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
342static void 754static void
343save_state(pTHX_ Coro__State c, int flags) 755save_perl (pTHX_ Coro__State c)
344{ 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
345 { 778 {
346 dSP; 779 dSP;
347 I32 cxix = cxstack_ix; 780 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 781 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 782 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 784 /*
352 * 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
353 * (and reinitialize) all cv's in the whole callchain :( 786 * (and reinitialize) all cv's in the whole callchain :(
354 */ 787 */
355 788
356 PUSHs (Nullsv); 789 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 790 /* this loop was inspired by pp_caller */
358 for (;;) 791 for (;;)
359 { 792 {
360 while (cxix >= 0) 793 while (ecb_expect_true (cxix >= 0))
361 { 794 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 795 PERL_CONTEXT *cx = &ccstk[cxix--];
363 796
364 if (CxTYPE(cx) == CXt_SUB) 797 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 798 {
366 CV *cv = cx->blk_sub.cv; 799 CV *cv = cx->blk_sub.cv;
800
367 if (CvDEPTH(cv)) 801 if (ecb_expect_true (CvDEPTH (cv)))
368 { 802 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 803 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 804 PUSHs ((SV *)CvPADLIST (cv));
805 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 806 PUSHs ((SV *)cv);
385 807
386 get_padlist (cv); /* this is a monster */ 808 CvDEPTH (cv) = 0;
809 get_padlist (aTHX_ cv);
387 } 810 }
388 } 811 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 812 }
396 813
397 if (top_si->si_type == PERLSI_MAIN) 814 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
398 break; 815 break;
399 816
400 top_si = top_si->si_prev; 817 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack; 818 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix; 819 cxix = top_si->si_cxix;
403 } 820 }
404 821
405 PUTBACK; 822 PUTBACK;
406 } 823 }
407 824
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 825 /* allocate some space on the context stack for our purposes */
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 826 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 827 {
828 unsigned int i;
411 829
412 c->dowarn = PL_dowarn; 830 for (i = 0; i < SLOT_COUNT; ++i)
413 c->in_eval = PL_in_eval; 831 CXINC;
414 832
415 c->curstackinfo = PL_curstackinfo; 833 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 c->curstack = PL_curstack; 834 }
835
417 c->mainstack = PL_mainstack; 836 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp; 837
419 c->op = PL_op; 838 {
420 c->curpad = PL_curpad; 839 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
421 c->stack_base = PL_stack_base; 840
422 c->stack_max = PL_stack_max; 841#if CORO_JIT
423 c->tmps_stack = PL_tmps_stack; 842 save_perl_slots (slot);
424 c->tmps_floor = PL_tmps_floor; 843#else
425 c->tmps_ix = PL_tmps_ix; 844 #define VARx(name,expr,type) slot->name = expr;
426 c->tmps_max = PL_tmps_max; 845 # include "state.h"
427 c->markstack = PL_markstack; 846 #undef VARx
428 c->markstack_ptr = PL_markstack_ptr; 847#endif
429 c->markstack_max = PL_markstack_max; 848 }
430 c->scopestack = PL_scopestack;
431 c->scopestack_ix = PL_scopestack_ix;
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441} 849}
442 850
443/* 851/*
444 * allocate various perl stacks. This is an exact copy 852 * allocate various perl stacks. This is almost an exact copy
445 * of perl.c:init_stacks, except that it uses less memory 853 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need 854 * on the (sometimes correct) assumption that coroutines do
447 * a lot of stackspace. 855 * not usually need a lot of stackspace.
448 */ 856 */
449STATIC void 857#if CORO_PREFER_PERL_FUNCTIONS
858# define coro_init_stacks(thx) init_stacks ()
859#else
860static void
450coro_init_stacks (pTHX) 861coro_init_stacks (pTHX)
451{ 862{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 863 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
453 PL_curstackinfo->si_type = PERLSI_MAIN; 864 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack; 865 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 866 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456 867
457 PL_stack_base = AvARRAY(PL_curstack); 868 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base; 869 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 870 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460 871
461 New(50,PL_tmps_stack,96,SV*); 872 New(50,PL_tmps_stack,32,SV*);
462 PL_tmps_floor = -1; 873 PL_tmps_floor = -1;
463 PL_tmps_ix = -1; 874 PL_tmps_ix = -1;
464 PL_tmps_max = 96; 875 PL_tmps_max = 32;
465 876
466 New(54,PL_markstack,16,I32); 877 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack; 878 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16; 879 PL_markstack_max = PL_markstack + 16;
469 880
881#ifdef SET_MARK_OFFSET
470 SET_MARK_OFFSET; 882 SET_MARK_OFFSET;
883#endif
471 884
472 New(54,PL_scopestack,16,I32); 885 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 886 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 887 PL_scopestack_max = 8;
888#if HAS_SCOPESTACK_NAME
889 New(54,PL_scopestack_name,8,const char*);
890#endif
475 891
476 New(54,PL_savestack,96,ANY); 892 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 893 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 894 PL_savestack_max = 24;
479 895
896#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 897 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 898 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 899 PL_retstack_max = 4;
900#endif
483} 901}
902#endif
484 903
485/* 904/*
486 * destroy the stacks, the callchain etc... 905 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */ 906 */
489STATIC void 907static void
490destroy_stacks(pTHX) 908coro_destruct_stacks (pTHX)
491{ 909{
492 /* is this ugly, I ask? */
493 while (PL_scopestack_ix)
494 LEAVE;
495
496 /* sure it is, but more important: is it correct?? :/ */
497 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
498 FREETMPS;
499
500 while (PL_curstackinfo->si_next) 910 while (PL_curstackinfo->si_next)
501 PL_curstackinfo = PL_curstackinfo->si_next; 911 PL_curstackinfo = PL_curstackinfo->si_next;
502 912
503 while (PL_curstackinfo) 913 while (PL_curstackinfo)
504 { 914 {
505 PERL_SI *p = PL_curstackinfo->si_prev; 915 PERL_SI *p = PL_curstackinfo->si_prev;
506 916
507 { 917 if (!IN_DESTRUCT)
508 dSP;
509 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
510 PUTBACK; /* possibly superfluous */
511 }
512
513 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
514 dounwind(-1);
515
516 SvREFCNT_dec(PL_curstackinfo->si_stack); 918 SvREFCNT_dec (PL_curstackinfo->si_stack);
919
517 Safefree(PL_curstackinfo->si_cxstack); 920 Safefree (PL_curstackinfo->si_cxstack);
518 Safefree(PL_curstackinfo); 921 Safefree (PL_curstackinfo);
519 PL_curstackinfo = p; 922 PL_curstackinfo = p;
520 } 923 }
521 924
522 Safefree(PL_tmps_stack); 925 Safefree (PL_tmps_stack);
523 Safefree(PL_markstack); 926 Safefree (PL_markstack);
524 Safefree(PL_scopestack); 927 Safefree (PL_scopestack);
928#if HAS_SCOPESTACK_NAME
929 Safefree (PL_scopestack_name);
930#endif
525 Safefree(PL_savestack); 931 Safefree (PL_savestack);
932#if !PERL_VERSION_ATLEAST (5,10,0)
526 Safefree(PL_retstack); 933 Safefree (PL_retstack);
527}
528
529static void
530allocate_stack (Coro__State ctx, int alloc)
531{
532 coro_stack *stack;
533
534 New (0, stack, 1, coro_stack);
535
536 stack->refcnt = 1;
537 stack->usecnt = 1;
538 stack->gencnt = ctx->gencnt = 0;
539 if (alloc)
540 {
541#ifdef HAVE_MMAP
542 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
543 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
544 if (stack->sptr == (void *)-1)
545#endif 934#endif
935}
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)
546 { 954 {
547 /*FIXME*//*D*//* reasonable stack size! */ 955 #define SYM(sym) PL_ ## sym
548 stack->ssize = -4096 * sizeof (long); 956 CORO_RSS;
549 New (0, stack->sptr, 4096, long); 957 #undef SYM
550 } 958 }
551 }
552 else 959 else
553 stack->sptr = 0;
554
555 ctx->stack = stack;
556}
557
558static void
559deallocate_stack (Coro__State ctx)
560{
561 coro_stack *stack = ctx->stack;
562
563 ctx->stack = 0;
564
565 if (stack)
566 {
567 if (!--stack->refcnt)
568 { 960 {
569#ifdef HAVE_MMAP 961 #define SYM(sym) coro->slot->sym
570 if (stack->ssize > 0 && stack->sptr) 962 CORO_RSS;
571 munmap (stack->sptr, stack->ssize); 963 #undef SYM
964 }
965 }
966
967 return rss;
968}
969
970/** coroutine stack handling ************************************************/
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 *ssv;
1004
1005 if (!*svp)
1006 ssv = &PL_sv_undef;
1007 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1008 ssv = sv_2mortal (newRV_inc (*svp));
572 else 1009 else
573#else 1010 ssv = *svp;
574 Safefree (stack->sptr); 1011
575#endif 1012 sv_setsv (sv, ssv);
576 Safefree (stack); 1013 return 0;
577 } 1014 }
578 else if (ctx->gencnt == stack->gencnt) 1015 }
579 --stack->usecnt; 1016
1017 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1018}
1019
1020static int ecb_cold
1021coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1022{
1023 const char *s = MgPV_nolen_const (mg);
1024
1025 if (*s == '_')
580 } 1026 {
581} 1027 SV **svp = 0;
582 1028
1029 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1030 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1031
1032 if (svp)
1033 {
1034 SV *old = *svp;
1035 *svp = 0;
1036 SvREFCNT_dec (old);
1037 return 0;
1038 }
1039 }
1040
1041 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1042}
1043
1044static int ecb_cold
1045coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1046{
1047 const char *s = MgPV_nolen_const (mg);
1048
1049 if (*s == '_')
1050 {
1051 SV **svp = 0;
1052
1053 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1054 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1055
1056 if (svp)
1057 {
1058 SV *old = *svp;
1059 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1060 SvREFCNT_dec (old);
1061 return 0;
1062 }
1063 }
1064
1065 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1066}
1067
1068static void
1069prepare_nop (pTHX_ struct coro_transfer_args *ta)
1070{
1071 /* kind of mega-hacky, but works */
1072 ta->next = ta->prev = (struct coro *)ta;
1073}
1074
583static void 1075static int
584setup_coro (void *arg) 1076slf_check_nop (pTHX_ struct CoroSLF *frame)
1077{
1078 return 0;
1079}
1080
1081static int
1082slf_check_repeat (pTHX_ struct CoroSLF *frame)
1083{
1084 return 1;
1085}
1086
1087static UNOP init_perl_op;
1088
1089ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1090init_perl (pTHX_ struct coro *coro)
585{ 1091{
586 /* 1092 /*
587 * emulate part of the perl startup here. 1093 * emulate part of the perl startup here.
588 */ 1094 */
1095 coro_init_stacks (aTHX);
1096
1097 PL_runops = RUNOPS_DEFAULT;
1098 PL_curcop = &PL_compiling;
1099 PL_in_eval = EVAL_NULL;
1100 PL_comppad = 0;
1101 PL_comppad_name = 0;
1102 PL_comppad_name_fill = 0;
1103 PL_comppad_name_floor = 0;
1104 PL_curpm = 0;
1105 PL_curpad = 0;
1106 PL_localizing = 0;
1107 PL_restartop = 0;
1108#if PERL_VERSION_ATLEAST (5,10,0)
1109 PL_parser = 0;
1110#endif
1111 PL_hints = 0;
1112
1113 /* recreate the die/warn hooks */
1114 PL_diehook = SvREFCNT_inc (rv_diehook);
1115 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1116
1117 GvSV (PL_defgv) = newSV (0);
1118 GvAV (PL_defgv) = coro->args; coro->args = 0;
1119 GvSV (PL_errgv) = newSV (0);
1120 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1121 GvHV (PL_hintgv) = 0;
1122 PL_rs = newSVsv (GvSV (irsgv));
1123 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1124
1125 {
1126 dSP;
1127 UNOP myop;
1128
1129 Zero (&myop, 1, UNOP);
1130 myop.op_next = Nullop;
1131 myop.op_type = OP_ENTERSUB;
1132 myop.op_flags = OPf_WANT_VOID;
1133
1134 PUSHMARK (SP);
1135 PUSHs ((SV *)coro->startcv);
1136 PUTBACK;
1137 PL_op = (OP *)&myop;
1138 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1139 }
1140
1141 /* this newly created coroutine might be run on an existing cctx which most
1142 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1143 */
1144 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1145 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1146 slf_frame.destroy = 0;
1147
1148 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1149 init_perl_op.op_next = PL_op;
1150 init_perl_op.op_type = OP_ENTERSUB;
1151 init_perl_op.op_ppaddr = pp_slf;
1152 /* no flags etc. required, as an init function won't be called */
1153
1154 PL_op = (OP *)&init_perl_op;
1155
1156 /* copy throw, in case it was set before init_perl */
1157 CORO_THROW = coro->except;
1158
1159 SWAP_SVS (coro);
1160
1161 if (ecb_expect_false (enable_times))
1162 {
1163 coro_times_update ();
1164 coro_times_sub (coro);
1165 }
1166}
1167
1168static void
1169coro_unwind_stacks (pTHX)
1170{
1171 if (!IN_DESTRUCT)
1172 {
1173 /* restore all saved variables and stuff */
1174 LEAVE_SCOPE (0);
1175 assert (PL_tmps_floor == -1);
1176
1177 /* free all temporaries */
1178 FREETMPS;
1179 assert (PL_tmps_ix == -1);
1180
1181 /* unwind all extra stacks */
1182 POPSTACK_TO (PL_mainstack);
1183
1184 /* unwind main stack */
1185 dounwind (-1);
1186 }
1187}
1188
1189static void
1190destroy_perl (pTHX_ struct coro *coro)
1191{
1192 SV *svf [9];
1193
1194 {
1195 SV *old_current = SvRV (coro_current);
1196 struct coro *current = SvSTATE (old_current);
1197
1198 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1199
1200 save_perl (aTHX_ current);
1201
1202 /* this will cause transfer_check to croak on block*/
1203 SvRV_set (coro_current, (SV *)coro->hv);
1204
1205 load_perl (aTHX_ coro);
1206
1207 coro_unwind_stacks (aTHX);
1208
1209 /* restore swapped sv's */
1210 SWAP_SVS (coro);
1211
1212 coro_destruct_stacks (aTHX);
1213
1214 /* now save some sv's to be free'd later */
1215 svf [0] = GvSV (PL_defgv);
1216 svf [1] = (SV *)GvAV (PL_defgv);
1217 svf [2] = GvSV (PL_errgv);
1218 svf [3] = (SV *)PL_defoutgv;
1219 svf [4] = PL_rs;
1220 svf [5] = GvSV (irsgv);
1221 svf [6] = (SV *)GvHV (PL_hintgv);
1222 svf [7] = PL_diehook;
1223 svf [8] = PL_warnhook;
1224 assert (9 == sizeof (svf) / sizeof (*svf));
1225
1226 SvRV_set (coro_current, old_current);
1227
1228 load_perl (aTHX_ current);
1229 }
1230
1231 {
1232 unsigned int i;
1233
1234 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1235 SvREFCNT_dec (svf [i]);
1236
1237 SvREFCNT_dec (coro->saved_deffh);
1238 SvREFCNT_dec (coro->rouse_cb);
1239 SvREFCNT_dec (coro->invoke_cb);
1240 SvREFCNT_dec (coro->invoke_av);
1241 }
1242}
1243
1244ecb_inline void
1245free_coro_mortal (pTHX)
1246{
1247 if (ecb_expect_true (coro_mortal))
1248 {
1249 SvREFCNT_dec ((SV *)coro_mortal);
1250 coro_mortal = 0;
1251 }
1252}
1253
1254static int
1255runops_trace (pTHX)
1256{
1257 COP *oldcop = 0;
1258 int oldcxix = -2;
1259
1260 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1261 {
1262 PERL_ASYNC_CHECK ();
1263
1264 if (cctx_current->flags & CC_TRACE_ALL)
1265 {
1266 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1267 {
1268 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1269 SV **bot, **top;
1270 AV *av = newAV (); /* return values */
1271 SV **cb;
1272 dSP;
1273
1274 GV *gv = CvGV (cx->blk_sub.cv);
1275 SV *fullname = sv_2mortal (newSV (0));
1276 if (isGV (gv))
1277 gv_efullname3 (fullname, gv, 0);
1278
1279 bot = PL_stack_base + cx->blk_oldsp + 1;
1280 top = cx->blk_gimme == G_ARRAY ? SP + 1
1281 : cx->blk_gimme == G_SCALAR ? bot + 1
1282 : bot;
1283
1284 av_extend (av, top - bot);
1285 while (bot < top)
1286 av_push (av, SvREFCNT_inc_NN (*bot++));
1287
1288 PL_runops = RUNOPS_DEFAULT;
1289 ENTER;
1290 SAVETMPS;
1291 EXTEND (SP, 3);
1292 PUSHMARK (SP);
1293 PUSHs (&PL_sv_no);
1294 PUSHs (fullname);
1295 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1296 PUTBACK;
1297 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1298 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1299 SPAGAIN;
1300 FREETMPS;
1301 LEAVE;
1302 PL_runops = runops_trace;
1303 }
1304
1305 if (oldcop != PL_curcop)
1306 {
1307 oldcop = PL_curcop;
1308
1309 if (PL_curcop != &PL_compiling)
1310 {
1311 SV **cb;
1312
1313 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1314 {
1315 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1316
1317 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1318 {
1319 dSP;
1320 GV *gv = CvGV (cx->blk_sub.cv);
1321 SV *fullname = sv_2mortal (newSV (0));
1322
1323 if (isGV (gv))
1324 gv_efullname3 (fullname, gv, 0);
1325
1326 PL_runops = RUNOPS_DEFAULT;
1327 ENTER;
1328 SAVETMPS;
1329 EXTEND (SP, 3);
1330 PUSHMARK (SP);
1331 PUSHs (&PL_sv_yes);
1332 PUSHs (fullname);
1333 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1334 PUTBACK;
1335 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1336 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1337 SPAGAIN;
1338 FREETMPS;
1339 LEAVE;
1340 PL_runops = runops_trace;
1341 }
1342
1343 oldcxix = cxstack_ix;
1344 }
1345
1346 if (cctx_current->flags & CC_TRACE_LINE)
1347 {
1348 dSP;
1349
1350 PL_runops = RUNOPS_DEFAULT;
1351 ENTER;
1352 SAVETMPS;
1353 EXTEND (SP, 3);
1354 PL_runops = RUNOPS_DEFAULT;
1355 PUSHMARK (SP);
1356 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1357 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1358 PUTBACK;
1359 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1360 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1361 SPAGAIN;
1362 FREETMPS;
1363 LEAVE;
1364 PL_runops = runops_trace;
1365 }
1366 }
1367 }
1368 }
1369 }
1370
1371 TAINT_NOT;
1372 return 0;
1373}
1374
1375static struct CoroSLF cctx_ssl_frame;
1376
1377static void
1378slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1379{
1380 ta->prev = 0;
1381}
1382
1383static int
1384slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1385{
1386 *frame = cctx_ssl_frame;
1387
1388 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1389}
1390
1391/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1392static void ecb_noinline
1393cctx_prepare (pTHX)
1394{
1395 PL_top_env = &PL_start_env;
1396
1397 if (cctx_current->flags & CC_TRACE)
1398 PL_runops = runops_trace;
1399
1400 /* we already must be executing an SLF op, there is no other valid way
1401 * that can lead to creation of a new cctx */
1402 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1403 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1404
1405 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1406 cctx_ssl_frame = slf_frame;
1407
1408 slf_frame.prepare = slf_prepare_set_stacklevel;
1409 slf_frame.check = slf_check_set_stacklevel;
1410}
1411
1412/* the tail of transfer: execute stuff we can only do after a transfer */
1413ecb_inline void
1414transfer_tail (pTHX)
1415{
1416 free_coro_mortal (aTHX);
1417}
1418
1419/*
1420 * this is a _very_ stripped down perl interpreter ;)
1421 */
1422static void
1423cctx_run (void *arg)
1424{
1425#ifdef USE_ITHREADS
1426# if CORO_PTHREAD
1427 PERL_SET_CONTEXT (coro_thx);
1428# endif
1429#endif
1430 {
1431 dTHX;
1432
1433 /* normally we would need to skip the entersub here */
1434 /* not doing so will re-execute it, which is exactly what we want */
1435 /* PL_nop = PL_nop->op_next */
1436
1437 /* inject a fake subroutine call to cctx_init */
1438 cctx_prepare (aTHX);
1439
1440 /* cctx_run is the alternative tail of transfer() */
1441 transfer_tail (aTHX);
1442
1443 /* somebody or something will hit me for both perl_run and PL_restartop */
1444 PL_restartop = PL_op;
1445 perl_run (PL_curinterp);
1446 /*
1447 * Unfortunately, there is no way to get at the return values of the
1448 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1449 * runtime errors here, as this is just a random interpreter, not a thread.
1450 */
1451
1452 /*
1453 * If perl-run returns we assume exit() was being called or the coro
1454 * fell off the end, which seems to be the only valid (non-bug)
1455 * reason for perl_run to return. We try to exit by jumping to the
1456 * bootstrap-time "top" top_env, as we cannot restore the "main"
1457 * coroutine as Coro has no such concept.
1458 * This actually isn't valid with the pthread backend, but OSes requiring
1459 * that backend are too broken to do it in a standards-compliant way.
1460 */
1461 PL_top_env = main_top_env;
1462 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1463 }
1464}
1465
1466static coro_cctx *
1467cctx_new (void)
1468{
1469 coro_cctx *cctx;
1470
1471 ++cctx_count;
1472 New (0, cctx, 1, coro_cctx);
1473
1474 cctx->gen = cctx_gen;
1475 cctx->flags = 0;
1476 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1477
1478 return cctx;
1479}
1480
1481/* create a new cctx only suitable as source */
1482static coro_cctx *
1483cctx_new_empty (void)
1484{
1485 coro_cctx *cctx = cctx_new ();
1486
1487 cctx->sptr = 0;
1488 coro_create (&cctx->cctx, 0, 0, 0, 0);
1489
1490 return cctx;
1491}
1492
1493/* create a new cctx suitable as destination/running a perl interpreter */
1494static coro_cctx *
1495cctx_new_run (void)
1496{
1497 coro_cctx *cctx = cctx_new ();
1498 void *stack_start;
1499 size_t stack_size;
1500
1501#if HAVE_MMAP
1502 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1503 /* mmap supposedly does allocate-on-write for us */
1504 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
1505
1506 if (cctx->sptr != (void *)-1)
1507 {
1508 #if CORO_STACKGUARD
1509 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1510 #endif
1511 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1512 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1513 cctx->flags |= CC_MAPPED;
1514 }
1515 else
1516#endif
1517 {
1518 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1519 New (0, cctx->sptr, cctx_stacksize, long);
1520
1521 if (!cctx->sptr)
1522 {
1523 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1524 _exit (EXIT_FAILURE);
1525 }
1526
1527 stack_start = cctx->sptr;
1528 stack_size = cctx->ssize;
1529 }
1530
1531 #if CORO_USE_VALGRIND
1532 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1533 #endif
1534
1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1536
1537 return cctx;
1538}
1539
1540static void
1541cctx_destroy (coro_cctx *cctx)
1542{
1543 if (!cctx)
1544 return;
1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
1550
1551 /* coro_transfer creates new, empty cctx's */
1552 if (cctx->sptr)
1553 {
1554 #if CORO_USE_VALGRIND
1555 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1556 #endif
1557
1558#if HAVE_MMAP
1559 if (cctx->flags & CC_MAPPED)
1560 munmap (cctx->sptr, cctx->ssize);
1561 else
1562#endif
1563 Safefree (cctx->sptr);
1564 }
1565
1566 Safefree (cctx);
1567}
1568
1569/* wether this cctx should be destructed */
1570#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1571
1572static coro_cctx *
1573cctx_get (pTHX)
1574{
1575 while (ecb_expect_true (cctx_first))
1576 {
1577 coro_cctx *cctx = cctx_first;
1578 cctx_first = cctx->next;
1579 --cctx_idle;
1580
1581 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1582 return cctx;
1583
1584 cctx_destroy (cctx);
1585 }
1586
1587 return cctx_new_run ();
1588}
1589
1590static void
1591cctx_put (coro_cctx *cctx)
1592{
1593 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1594
1595 /* free another cctx if overlimit */
1596 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1597 {
1598 coro_cctx *first = cctx_first;
1599 cctx_first = first->next;
1600 --cctx_idle;
1601
1602 cctx_destroy (first);
1603 }
1604
1605 ++cctx_idle;
1606 cctx->next = cctx_first;
1607 cctx_first = cctx;
1608}
1609
1610/** coroutine switching *****************************************************/
1611
1612static void
1613transfer_check (pTHX_ struct coro *prev, struct coro *next)
1614{
1615 /* TODO: throwing up here is considered harmful */
1616
1617 if (ecb_expect_true (prev != next))
1618 {
1619 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1620 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1621
1622 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1623 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1624
1625#if !PERL_VERSION_ATLEAST (5,10,0)
1626 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1627 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1628#endif
1629 }
1630}
1631
1632/* always use the TRANSFER macro */
1633static void ecb_noinline /* noinline so we have a fixed stackframe */
1634transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1635{
1636 dSTACKLEVEL;
1637
1638 /* sometimes transfer is only called to set idle_sp */
1639 if (ecb_expect_false (!prev))
1640 {
1641 cctx_current->idle_sp = STACKLEVEL;
1642 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1643 }
1644 else if (ecb_expect_true (prev != next))
1645 {
1646 coro_cctx *cctx_prev;
1647
1648 if (ecb_expect_false (prev->flags & CF_NEW))
1649 {
1650 /* create a new empty/source context */
1651 prev->flags &= ~CF_NEW;
1652 prev->flags |= CF_RUNNING;
1653 }
1654
1655 prev->flags &= ~CF_RUNNING;
1656 next->flags |= CF_RUNNING;
1657
1658 /* first get rid of the old state */
1659 save_perl (aTHX_ prev);
1660
1661 if (ecb_expect_false (next->flags & CF_NEW))
1662 {
1663 /* need to start coroutine */
1664 next->flags &= ~CF_NEW;
1665 /* setup coroutine call */
1666 init_perl (aTHX_ next);
1667 }
1668 else
1669 load_perl (aTHX_ next);
1670
1671 /* possibly untie and reuse the cctx */
1672 if (ecb_expect_true (
1673 cctx_current->idle_sp == STACKLEVEL
1674 && !(cctx_current->flags & CC_TRACE)
1675 && !force_cctx
1676 ))
1677 {
1678 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1679 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1680
1681 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1682 /* without this the next cctx_get might destroy the running cctx while still in use */
1683 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1684 if (ecb_expect_true (!next->cctx))
1685 next->cctx = cctx_get (aTHX);
1686
1687 cctx_put (cctx_current);
1688 }
1689 else
1690 prev->cctx = cctx_current;
1691
1692 ++next->usecount;
1693
1694 cctx_prev = cctx_current;
1695 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1696
1697 next->cctx = 0;
1698
1699 if (ecb_expect_false (cctx_prev != cctx_current))
1700 {
1701 cctx_prev->top_env = PL_top_env;
1702 PL_top_env = cctx_current->top_env;
1703 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1704 }
1705
1706 transfer_tail (aTHX);
1707 }
1708}
1709
1710#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1711#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1712
1713/** high level stuff ********************************************************/
1714
1715/* this function is actually Coro, not Coro::State, but we call it from here */
1716/* because it is convenient - but it hasn't been declared yet for that reason */
1717static void
1718coro_call_on_destroy (pTHX_ struct coro *coro);
1719
1720static void
1721coro_state_destroy (pTHX_ struct coro *coro)
1722{
1723 if (coro->flags & CF_ZOMBIE)
1724 return;
1725
1726 slf_destroy (aTHX_ coro);
1727
1728 coro->flags |= CF_ZOMBIE;
1729
1730 if (coro->flags & CF_READY)
1731 {
1732 /* reduce nready, as destroying a ready coro effectively unreadies it */
1733 /* alternative: look through all ready queues and remove the coro */
1734 --coro_nready;
1735 }
1736 else
1737 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1738
1739 if (coro->next) coro->next->prev = coro->prev;
1740 if (coro->prev) coro->prev->next = coro->next;
1741 if (coro == coro_first) coro_first = coro->next;
1742
1743 if (coro->mainstack
1744 && coro->mainstack != main_mainstack
1745 && coro->slot
1746 && !PL_dirty)
1747 destroy_perl (aTHX_ coro);
1748
1749 cctx_destroy (coro->cctx);
1750 SvREFCNT_dec (coro->startcv);
1751 SvREFCNT_dec (coro->args);
1752 SvREFCNT_dec (coro->swap_sv);
1753 SvREFCNT_dec (CORO_THROW);
1754
1755 coro_call_on_destroy (aTHX_ coro);
1756
1757 /* more destruction mayhem in coro_state_free */
1758}
1759
1760static int
1761coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1762{
1763 struct coro *coro = (struct coro *)mg->mg_ptr;
1764 mg->mg_ptr = 0;
1765
1766 coro_state_destroy (aTHX_ coro);
1767 SvREFCNT_dec (coro->on_destroy);
1768 SvREFCNT_dec (coro->status);
1769
1770 Safefree (coro);
1771
1772 return 0;
1773}
1774
1775static int ecb_cold
1776coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1777{
1778 /* called when perl clones the current process the slow way (windows process emulation) */
1779 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1780 mg->mg_ptr = 0;
1781 mg->mg_virtual = 0;
1782
1783 return 0;
1784}
1785
1786static MGVTBL coro_state_vtbl = {
1787 0, 0, 0, 0,
1788 coro_state_free,
1789 0,
1790#ifdef MGf_DUP
1791 coro_state_dup,
1792#else
1793# define MGf_DUP 0
1794#endif
1795};
1796
1797static void
1798prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1799{
1800 ta->prev = SvSTATE (prev_sv);
1801 ta->next = SvSTATE (next_sv);
1802 TRANSFER_CHECK (*ta);
1803}
1804
1805static void
1806api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1807{
1808 struct coro_transfer_args ta;
1809
1810 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1811 TRANSFER (ta, 1);
1812}
1813
1814/** Coro ********************************************************************/
1815
1816ecb_inline void
1817coro_enq (pTHX_ struct coro *coro)
1818{
1819 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1820
1821 SvREFCNT_inc_NN (coro->hv);
1822
1823 coro->next_ready = 0;
1824 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1825 ready [1] = coro;
1826}
1827
1828ecb_inline struct coro *
1829coro_deq (pTHX)
1830{
1831 int prio;
1832
1833 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1834 {
1835 struct coro **ready = coro_ready [prio];
1836
1837 if (ready [0])
1838 {
1839 struct coro *coro = ready [0];
1840 ready [0] = coro->next_ready;
1841 return coro;
1842 }
1843 }
1844
1845 return 0;
1846}
1847
1848static void
1849invoke_sv_ready_hook_helper (void)
1850{
1851 dTHX;
589 dSP; 1852 dSP;
590 Coro__State ctx = (Coro__State)arg;
591 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
592 1853
593 coro_init_stacks (aTHX); 1854 ENTER;
594 /*PL_curcop = 0;*/ 1855 SAVETMPS;
595 /*PL_in_eval = PL_in_eval;*/ /* inherit */
596 SvREFCNT_dec (GvAV (PL_defgv));
597 GvAV (PL_defgv) = ctx->args;
598 1856
599 SPAGAIN;
600
601 if (ctx->stack)
602 {
603 ctx->cursp = 0;
604
605 PUSHMARK(SP); 1857 PUSHMARK (SP);
606 PUTBACK; 1858 PUTBACK;
607 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1859 call_sv (coro_readyhook, G_VOID | G_DISCARD);
608 1860
609 if (SvTRUE (ERRSV)) 1861 FREETMPS;
610 croak (NULL); 1862 LEAVE;
611 else 1863}
612 croak ("FATAL: CCTXT coroutine returned!"); 1864
1865static int
1866api_ready (pTHX_ SV *coro_sv)
1867{
1868 struct coro *coro = SvSTATE (coro_sv);
1869
1870 if (coro->flags & CF_READY)
1871 return 0;
1872
1873 coro->flags |= CF_READY;
1874
1875 coro_enq (aTHX_ coro);
1876
1877 if (!coro_nready++)
1878 if (coroapi.readyhook)
1879 coroapi.readyhook ();
1880
1881 return 1;
1882}
1883
1884static int
1885api_is_ready (pTHX_ SV *coro_sv)
1886{
1887 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1888}
1889
1890/* expects to own a reference to next->hv */
1891ecb_inline void
1892prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1893{
1894 SV *prev_sv = SvRV (coro_current);
1895
1896 ta->prev = SvSTATE_hv (prev_sv);
1897 ta->next = next;
1898
1899 TRANSFER_CHECK (*ta);
1900
1901 SvRV_set (coro_current, (SV *)next->hv);
1902
1903 free_coro_mortal (aTHX);
1904 coro_mortal = prev_sv;
1905}
1906
1907static void
1908prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1909{
1910 for (;;)
613 } 1911 {
614 else 1912 struct coro *next = coro_deq (aTHX);
615 {
616 UNOP myop;
617 1913
618 PL_op = (OP *)&myop; 1914 if (ecb_expect_true (next))
619
620 Zero(&myop, 1, UNOP);
621 myop.op_next = Nullop;
622 myop.op_flags = OPf_WANT_VOID;
623
624 PUSHMARK(SP);
625 XPUSHs (sub_init);
626 /*
627 * the next line is slightly wrong, as PL_op->op_next
628 * is actually being executed so we skip the first op.
629 * that doesn't matter, though, since it is only
630 * pp_nextstate and we never return...
631 * ah yes, and I don't care anyways ;)
632 */
633 PUTBACK;
634 PL_op = pp_entersub();
635 SPAGAIN;
636
637 ENTER; /* necessary e.g. for dounwind */
638 }
639}
640
641static void
642continue_coro (void *arg)
643{
644 /*
645 * this is a _very_ stripped down perl interpreter ;)
646 */
647 Coro__State ctx = (Coro__State)arg;
648
649 /*FIXME*//* must set up top_env here */
650 ctx->cursp = 0;
651 PL_op = PL_op->op_next;
652 CALLRUNOPS(aTHX);
653
654 abort ();
655}
656
657STATIC void
658transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
659{
660 dSTACKLEVEL;
661 static struct coro *xnext;
662
663 if (prev != next)
664 {
665 xnext = next;
666
667 if (next->mainstack)
668 { 1915 {
669 SAVE (prev, flags); 1916 /* cannot transfer to destroyed coros, skip and look for next */
670 LOAD (next); 1917 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
671 1918 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
672 /* mark this state as in-use */ 1919 else
673 next->mainstack = 0;
674 next->tmps_ix = -2;
675
676 /* stacklevel changed? if yes, grab the stack for us! */
677 if (flags & TRANSFER_SAVE_CCTXT)
678 { 1920 {
679 if (!prev->stack) 1921 next->flags &= ~CF_READY;
680 allocate_stack (prev, 0); 1922 --coro_nready;
681 else if (prev->cursp != stacklevel 1923
682 && prev->stack->usecnt > 1) 1924 prepare_schedule_to (aTHX_ ta, next);
683 { 1925 break;
684 prev->gencnt = ++prev->stack->gencnt;
685 prev->stack->usecnt = 1;
686 }
687
688 /* has our stack been invalidated? */
689 if (next->stack && next->stack->gencnt != next->gencnt)
690 {
691 deallocate_stack (next);
692 allocate_stack (next, 1);
693 coro_create (&(next->stack->cctx),
694 continue_coro, (void *)next,
695 next->stack->sptr, labs (next->stack->ssize));
696 }
697
698 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
699 /* don't add any code here */
700 } 1926 }
701
702 } 1927 }
703 else if (next->tmps_ix == -2)
704 croak ("tried to transfer to running coroutine");
705 else 1928 else
706 { 1929 {
707 SAVE (prev, -1); /* first get rid of the old state */ 1930 /* nothing to schedule: call the idle handler */
708 1931 if (SvROK (sv_idle)
709 if (flags & TRANSFER_SAVE_CCTXT) 1932 && SvOBJECT (SvRV (sv_idle)))
710 { 1933 {
711 if (!prev->stack) 1934 if (SvRV (sv_idle) == SvRV (coro_current))
712 allocate_stack (prev, 0); 1935 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
713 1936
714 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1937 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
715 { 1938 api_ready (aTHX_ SvRV (sv_idle));
716 setup_coro (next); 1939 --coro_nready;
717
718 prev->stack->refcnt++;
719 prev->stack->usecnt++;
720 next->stack = prev->stack;
721 next->gencnt = prev->gencnt;
722 }
723 else
724 {
725 allocate_stack (next, 1);
726 coro_create (&(next->stack->cctx),
727 setup_coro, (void *)next,
728 next->stack->sptr, labs (next->stack->ssize));
729 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
730 /* don't add any code here */
731 }
732 } 1940 }
733 else 1941 else
734 setup_coro (next); 1942 {
1943 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1944 dSP;
1945
1946 ENTER;
1947 SAVETMPS;
1948
1949 PUSHMARK (SP);
1950 PUTBACK;
1951 call_sv (sv_idle, G_VOID | G_DISCARD);
1952
1953 FREETMPS;
1954 LEAVE;
1955 }
735 } 1956 }
736 } 1957 }
737
738 /*
739 * xnext is now either prev or next, depending on wether
740 * we switched the c stack or not. that's why i use a global
741 * variable, that should become thread-specific at one point.
742 */
743 xnext->cursp = stacklevel;
744} 1958}
745 1959
746static struct coro * 1960ecb_inline void
747sv_to_coro (SV *arg, const char *funcname, const char *varname) 1961prepare_cede (pTHX_ struct coro_transfer_args *ta)
748{ 1962{
749 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1963 api_ready (aTHX_ coro_current);
750 { 1964 prepare_schedule (aTHX_ ta);
751 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1965}
752 1966
753 if (!he) 1967ecb_inline void
754 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1968prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1969{
1970 SV *prev = SvRV (coro_current);
755 1971
756 arg = HeVAL(he); 1972 if (coro_nready)
757 } 1973 {
1974 prepare_schedule (aTHX_ ta);
1975 api_ready (aTHX_ prev);
758 1976 }
759 /* must also be changed inside Coro::Cont::yield */ 1977 else
760 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 1978 prepare_nop (aTHX_ ta);
761 return (struct coro *) SvIV((SV*)SvRV(arg));
762
763 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
764 /*NORETURN*/
765} 1979}
766 1980
1981static void
1982api_schedule (pTHX)
1983{
1984 struct coro_transfer_args ta;
1985
1986 prepare_schedule (aTHX_ &ta);
1987 TRANSFER (ta, 1);
1988}
1989
1990static void
1991api_schedule_to (pTHX_ SV *coro_sv)
1992{
1993 struct coro_transfer_args ta;
1994 struct coro *next = SvSTATE (coro_sv);
1995
1996 SvREFCNT_inc_NN (coro_sv);
1997 prepare_schedule_to (aTHX_ &ta, next);
1998}
1999
767static void 2000static int
768api_transfer(pTHX_ SV *prev, SV *next, int flags) 2001api_cede (pTHX)
769{ 2002{
770 transfer(aTHX_ 2003 struct coro_transfer_args ta;
771 sv_to_coro (prev, "Coro::transfer", "prev"),
772 sv_to_coro (next, "Coro::transfer", "next"),
773 flags);
774}
775 2004
776/** Coro ********************************************************************/ 2005 prepare_cede (aTHX_ &ta);
777 2006
778#define PRIO_MAX 3 2007 if (ecb_expect_true (ta.prev != ta.next))
779#define PRIO_HIGH 1 2008 {
780#define PRIO_NORMAL 0 2009 TRANSFER (ta, 1);
781#define PRIO_LOW -1 2010 return 1;
782#define PRIO_IDLE -3
783#define PRIO_MIN -4
784
785/* for Coro.pm */
786static GV *coro_current, *coro_idle;
787static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
788static int coro_nready;
789
790static void
791coro_enq (SV *sv)
792{
793 if (SvROK (sv))
794 { 2011 }
795 SV *hv = SvRV (sv); 2012 else
796 if (SvTYPE (hv) == SVt_PVHV) 2013 return 0;
2014}
2015
2016static int
2017api_cede_notself (pTHX)
2018{
2019 if (coro_nready)
2020 {
2021 struct coro_transfer_args ta;
2022
2023 prepare_cede_notself (aTHX_ &ta);
2024 TRANSFER (ta, 1);
2025 return 1;
2026 }
2027 else
2028 return 0;
2029}
2030
2031static void
2032api_trace (pTHX_ SV *coro_sv, int flags)
2033{
2034 struct coro *coro = SvSTATE (coro_sv);
2035
2036 if (coro->flags & CF_RUNNING)
2037 croak ("cannot enable tracing on a running coroutine, caught");
2038
2039 if (flags & CC_TRACE)
2040 {
2041 if (!coro->cctx)
2042 coro->cctx = cctx_new_run ();
2043 else if (!(coro->cctx->flags & CC_TRACE))
2044 croak ("cannot enable tracing on coroutine with custom stack, caught");
2045
2046 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2047 }
2048 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2049 {
2050 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2051
2052 if (coro->flags & CF_RUNNING)
2053 PL_runops = RUNOPS_DEFAULT;
2054 else
2055 coro->slot->runops = RUNOPS_DEFAULT;
2056 }
2057}
2058
2059static void
2060coro_push_av (pTHX_ AV *av, I32 gimme_v)
2061{
2062 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2063 {
2064 dSP;
2065
2066 if (gimme_v == G_SCALAR)
2067 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2068 else
797 { 2069 {
798 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2070 int i;
799 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2071 EXTEND (SP, AvFILLp (av) + 1);
800 2072
801 prio = prio > PRIO_MAX ? PRIO_MAX 2073 for (i = 0; i <= AvFILLp (av); ++i)
802 : prio < PRIO_MIN ? PRIO_MIN 2074 PUSHs (AvARRAY (av)[i]);
803 : prio; 2075 }
804 2076
805 av_push (coro_ready [prio - PRIO_MIN], sv); 2077 PUTBACK;
806 coro_nready++; 2078 }
2079}
807 2080
2081static void
2082coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2083{
2084 if (!coro->on_destroy)
2085 coro->on_destroy = newAV ();
2086
2087 av_push (coro->on_destroy, cb);
2088}
2089
2090static void
2091slf_destroy_join (pTHX_ struct CoroSLF *frame)
2092{
2093 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2094}
2095
2096static int
2097slf_check_join (pTHX_ struct CoroSLF *frame)
2098{
2099 struct coro *coro = (struct coro *)frame->data;
2100
2101 if (!coro->status)
2102 return 1;
2103
2104 frame->destroy = 0;
2105
2106 coro_push_av (aTHX_ coro->status, GIMME_V);
2107
2108 SvREFCNT_dec ((SV *)coro->hv);
2109
2110 return 0;
2111}
2112
2113static void
2114slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2115{
2116 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2117
2118 if (items > 1)
2119 croak ("join called with too many arguments");
2120
2121 if (coro->status)
2122 frame->prepare = prepare_nop;
2123 else
2124 {
2125 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2126 frame->prepare = prepare_schedule;
2127 }
2128
2129 frame->check = slf_check_join;
2130 frame->destroy = slf_destroy_join;
2131 frame->data = (void *)coro;
2132 SvREFCNT_inc (coro->hv);
2133}
2134
2135static void
2136coro_call_on_destroy (pTHX_ struct coro *coro)
2137{
2138 AV *od = coro->on_destroy;
2139
2140 if (!od)
2141 return;
2142
2143 while (AvFILLp (od) >= 0)
2144 {
2145 SV *cb = sv_2mortal (av_pop (od));
2146
2147 /* coro hv's (and only hv's at the moment) are supported as well */
2148 if (SvSTATEhv_p (aTHX_ cb))
2149 api_ready (aTHX_ cb);
2150 else
2151 {
2152 dSP; /* don't disturb outer sp */
2153 PUSHMARK (SP);
2154
2155 if (coro->status)
2156 {
2157 PUTBACK;
2158 coro_push_av (aTHX_ coro->status, G_ARRAY);
2159 SPAGAIN;
2160 }
2161
2162 PUTBACK;
2163 call_sv (cb, G_VOID | G_DISCARD);
2164 }
2165 }
2166}
2167
2168static void
2169coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2170{
2171 AV *av;
2172
2173 if (coro->status)
2174 {
2175 av = coro->status;
2176 av_clear (av);
2177 }
2178 else
2179 av = coro->status = newAV ();
2180
2181 /* items are actually not so common, so optimise for this case */
2182 if (items)
2183 {
2184 int i;
2185
2186 av_extend (av, items - 1);
2187
2188 for (i = 0; i < items; ++i)
2189 av_push (av, SvREFCNT_inc_NN (arg [i]));
2190 }
2191}
2192
2193static void
2194slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2195{
2196 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2197 api_ready (aTHX_ sv_manager);
2198
2199 frame->prepare = prepare_schedule;
2200 frame->check = slf_check_repeat;
2201
2202 /* as a minor optimisation, we could unwind all stacks here */
2203 /* but that puts extra pressure on pp_slf, and is not worth much */
2204 /*coro_unwind_stacks (aTHX);*/
2205}
2206
2207static void
2208slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 HV *coro_hv = (HV *)SvRV (coro_current);
2211
2212 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2213 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2214}
2215
2216static void
2217slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2218{
2219 HV *coro_hv;
2220 struct coro *coro;
2221
2222 if (items <= 0)
2223 croak ("Coro::cancel called without coro object,");
2224
2225 coro = SvSTATE (arg [0]);
2226 coro_hv = coro->hv;
2227
2228 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2229
2230 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2231 {
2232 /* coro currently busy cancelling something, so just notify it */
2233 coro->slf_frame.data = (void *)coro;
2234
2235 frame->prepare = prepare_nop;
2236 frame->check = slf_check_nop;
2237 }
2238 else if (coro_hv == (HV *)SvRV (coro_current))
2239 {
2240 /* cancelling the current coro is allowed, and equals terminate */
2241 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2242 }
2243 else
2244 {
2245 struct coro *self = SvSTATE_current;
2246
2247 /* otherwise we cancel directly, purely for speed reasons
2248 * unfortunately, this requires some magic trickery, as
2249 * somebody else could cancel us, so we have to fight the cancellation.
2250 * this is ugly, and hopefully fully worth the extra speed.
2251 * besides, I can't get the slow-but-safe version working...
2252 */
2253 slf_frame.data = 0;
2254 self->flags |= CF_NOCANCEL;
2255 coro_state_destroy (aTHX_ coro);
2256 self->flags &= ~CF_NOCANCEL;
2257
2258 if (slf_frame.data)
2259 {
2260 /* while we were busy we have been cancelled, so terminate */
2261 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2262 }
2263 else
2264 {
2265 frame->prepare = prepare_nop;
2266 frame->check = slf_check_nop;
2267 }
2268 }
2269}
2270
2271static int
2272slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2273{
2274 frame->prepare = 0;
2275 coro_unwind_stacks (aTHX);
2276
2277 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2278
2279 return 1;
2280}
2281
2282static int
2283safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2284{
2285 if (coro->cctx)
2286 croak ("coro inside C callback, unable to cancel at this time, caught");
2287
2288 if (coro->flags & CF_NEW)
2289 {
2290 coro_set_status (aTHX_ coro, arg, items);
2291 coro_state_destroy (aTHX_ coro);
2292 }
2293 else
2294 {
2295 if (!coro->slf_frame.prepare)
2296 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2297
2298 slf_destroy (aTHX_ coro);
2299
2300 coro_set_status (aTHX_ coro, arg, items);
2301 coro->slf_frame.prepare = prepare_nop;
2302 coro->slf_frame.check = slf_check_safe_cancel;
2303
2304 api_ready (aTHX_ (SV *)coro->hv);
2305 }
2306
2307 return 1;
2308}
2309
2310/*****************************************************************************/
2311/* async pool handler */
2312
2313static int
2314slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2315{
2316 HV *hv = (HV *)SvRV (coro_current);
2317 struct coro *coro = (struct coro *)frame->data;
2318
2319 if (!coro->invoke_cb)
2320 return 1; /* loop till we have invoke */
2321 else
2322 {
2323 hv_store (hv, "desc", sizeof ("desc") - 1,
2324 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2325
2326 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2327
2328 {
2329 dSP;
2330 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2331 PUTBACK;
2332 }
2333
2334 SvREFCNT_dec (GvAV (PL_defgv));
2335 GvAV (PL_defgv) = coro->invoke_av;
2336 coro->invoke_av = 0;
2337
2338 return 0;
2339 }
2340}
2341
2342static void
2343slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2344{
2345 HV *hv = (HV *)SvRV (coro_current);
2346 struct coro *coro = SvSTATE_hv ((SV *)hv);
2347
2348 if (ecb_expect_true (coro->saved_deffh))
2349 {
2350 /* subsequent iteration */
2351 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2352 coro->saved_deffh = 0;
2353
2354 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2355 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2356 {
2357 slf_init_terminate_cancel_common (aTHX_ frame, hv);
808 return; 2358 return;
809 } 2359 }
2360 else
2361 {
2362 av_clear (GvAV (PL_defgv));
2363 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2364
2365 coro->prio = 0;
2366
2367 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2368 api_trace (aTHX_ coro_current, 0);
2369
2370 frame->prepare = prepare_schedule;
2371 av_push (av_async_pool, SvREFCNT_inc (hv));
2372 }
2373 }
2374 else
810 } 2375 {
2376 /* first iteration, simply fall through */
2377 frame->prepare = prepare_nop;
2378 }
811 2379
812 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2380 frame->check = slf_check_pool_handler;
2381 frame->data = (void *)coro;
2382}
2383
2384/*****************************************************************************/
2385/* rouse callback */
2386
2387#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2388
2389static void
2390coro_rouse_callback (pTHX_ CV *cv)
2391{
2392 dXSARGS;
2393 SV *data = (SV *)S_GENSUB_ARG;
2394
2395 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2396 {
2397 /* first call, set args */
2398 SV *coro = SvRV (data);
2399 AV *av = newAV ();
2400
2401 SvRV_set (data, (SV *)av);
2402
2403 /* better take a full copy of the arguments */
2404 while (items--)
2405 av_store (av, items, newSVsv (ST (items)));
2406
2407 api_ready (aTHX_ coro);
2408 SvREFCNT_dec (coro);
2409 }
2410
2411 XSRETURN_EMPTY;
2412}
2413
2414static int
2415slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2416{
2417 SV *data = (SV *)frame->data;
2418
2419 if (CORO_THROW)
2420 return 0;
2421
2422 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2423 return 1;
2424
2425 /* now push all results on the stack */
2426 {
2427 dSP;
2428 AV *av = (AV *)SvRV (data);
2429 int i;
2430
2431 EXTEND (SP, AvFILLp (av) + 1);
2432 for (i = 0; i <= AvFILLp (av); ++i)
2433 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2434
2435 /* we have stolen the elements, so set length to zero and free */
2436 AvFILLp (av) = -1;
2437 av_undef (av);
2438
2439 PUTBACK;
2440 }
2441
2442 return 0;
2443}
2444
2445static void
2446slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2447{
2448 SV *cb;
2449
2450 if (items)
2451 cb = arg [0];
2452 else
2453 {
2454 struct coro *coro = SvSTATE_current;
2455
2456 if (!coro->rouse_cb)
2457 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2458
2459 cb = sv_2mortal (coro->rouse_cb);
2460 coro->rouse_cb = 0;
2461 }
2462
2463 if (!SvROK (cb)
2464 || SvTYPE (SvRV (cb)) != SVt_PVCV
2465 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2466 croak ("Coro::rouse_wait called with illegal callback argument,");
2467
2468 {
2469 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2470 SV *data = (SV *)S_GENSUB_ARG;
2471
2472 frame->data = (void *)data;
2473 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2474 frame->check = slf_check_rouse_wait;
2475 }
813} 2476}
814 2477
815static SV * 2478static SV *
816coro_deq (int min_prio) 2479coro_new_rouse_cb (pTHX)
817{ 2480{
818 int prio = PRIO_MAX - PRIO_MIN; 2481 HV *hv = (HV *)SvRV (coro_current);
2482 struct coro *coro = SvSTATE_hv (hv);
2483 SV *data = newRV_inc ((SV *)hv);
2484 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
819 2485
820 min_prio -= PRIO_MIN; 2486 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
821 if (min_prio < 0) 2487 SvREFCNT_dec (data); /* magicext increases the refcount */
822 min_prio = 0;
823 2488
824 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2489 SvREFCNT_dec (coro->rouse_cb);
825 if (av_len (coro_ready[prio]) >= 0) 2490 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2491
2492 return cb;
2493}
2494
2495/*****************************************************************************/
2496/* schedule-like-function opcode (SLF) */
2497
2498static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2499static const CV *slf_cv;
2500static SV **slf_argv;
2501static int slf_argc, slf_arga; /* count, allocated */
2502static I32 slf_ax; /* top of stack, for restore */
2503
2504/* this restores the stack in the case we patched the entersub, to */
2505/* recreate the stack frame as perl will on following calls */
2506/* since entersub cleared the stack */
2507static OP *
2508pp_restore (pTHX)
2509{
2510 int i;
2511 SV **SP = PL_stack_base + slf_ax;
2512
2513 PUSHMARK (SP);
2514
2515 EXTEND (SP, slf_argc + 1);
2516
2517 for (i = 0; i < slf_argc; ++i)
2518 PUSHs (sv_2mortal (slf_argv [i]));
2519
2520 PUSHs ((SV *)CvGV (slf_cv));
2521
2522 RETURNOP (slf_restore.op_first);
2523}
2524
2525static void
2526slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2527{
2528 SV **arg = (SV **)slf_frame.data;
2529
2530 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2531}
2532
2533static void
2534slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2535{
2536 if (items != 2)
2537 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2538
2539 frame->prepare = slf_prepare_transfer;
2540 frame->check = slf_check_nop;
2541 frame->data = (void *)arg; /* let's hope it will stay valid */
2542}
2543
2544static void
2545slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 frame->prepare = prepare_schedule;
2548 frame->check = slf_check_nop;
2549}
2550
2551static void
2552slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2553{
2554 struct coro *next = (struct coro *)slf_frame.data;
2555
2556 SvREFCNT_inc_NN (next->hv);
2557 prepare_schedule_to (aTHX_ ta, next);
2558}
2559
2560static void
2561slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 if (!items)
2564 croak ("Coro::schedule_to expects a coroutine argument, caught");
2565
2566 frame->data = (void *)SvSTATE (arg [0]);
2567 frame->prepare = slf_prepare_schedule_to;
2568 frame->check = slf_check_nop;
2569}
2570
2571static void
2572slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 api_ready (aTHX_ SvRV (coro_current));
2575
2576 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2577}
2578
2579static void
2580slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2581{
2582 frame->prepare = prepare_cede;
2583 frame->check = slf_check_nop;
2584}
2585
2586static void
2587slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_cede_notself;
2590 frame->check = slf_check_nop;
2591}
2592
2593/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2594static void
2595slf_destroy (pTHX_ struct coro *coro)
2596{
2597 /* this callback is reserved for slf functions needing to do cleanup */
2598 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2599 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2600
2601 /*
2602 * The on_destroy above most likely is from an SLF call.
2603 * Since by definition the SLF call will not finish when we destroy
2604 * the coro, we will have to force-finish it here, otherwise
2605 * cleanup functions cannot call SLF functions.
2606 */
2607 coro->slf_frame.prepare = 0;
2608}
2609
2610/*
2611 * these not obviously related functions are all rolled into one
2612 * function to increase chances that they all will call transfer with the same
2613 * stack offset
2614 * SLF stands for "schedule-like-function".
2615 */
2616static OP *
2617pp_slf (pTHX)
2618{
2619 I32 checkmark; /* mark SP to see how many elements check has pushed */
2620
2621 /* set up the slf frame, unless it has already been set-up */
2622 /* the latter happens when a new coro has been started */
2623 /* or when a new cctx was attached to an existing coroutine */
2624 if (ecb_expect_true (!slf_frame.prepare))
2625 {
2626 /* first iteration */
2627 dSP;
2628 SV **arg = PL_stack_base + TOPMARK + 1;
2629 int items = SP - arg; /* args without function object */
2630 SV *gv = *sp;
2631
2632 /* do a quick consistency check on the "function" object, and if it isn't */
2633 /* for us, divert to the real entersub */
2634 if (SvTYPE (gv) != SVt_PVGV
2635 || !GvCV (gv)
2636 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2637 return PL_ppaddr[OP_ENTERSUB](aTHX);
2638
2639 if (!(PL_op->op_flags & OPf_STACKED))
826 { 2640 {
827 coro_nready--; 2641 /* ampersand-form of call, use @_ instead of stack */
828 return av_shift (coro_ready[prio]); 2642 AV *av = GvAV (PL_defgv);
2643 arg = AvARRAY (av);
2644 items = AvFILLp (av) + 1;
829 } 2645 }
2646
2647 /* now call the init function, which needs to set up slf_frame */
2648 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2649 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2650
2651 /* pop args */
2652 SP = PL_stack_base + POPMARK;
2653
2654 PUTBACK;
2655 }
2656
2657 /* now that we have a slf_frame, interpret it! */
2658 /* we use a callback system not to make the code needlessly */
2659 /* complicated, but so we can run multiple perl coros from one cctx */
2660
2661 do
2662 {
2663 struct coro_transfer_args ta;
2664
2665 slf_frame.prepare (aTHX_ &ta);
2666 TRANSFER (ta, 0);
2667
2668 checkmark = PL_stack_sp - PL_stack_base;
2669 }
2670 while (slf_frame.check (aTHX_ &slf_frame));
2671
2672 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2673
2674 /* exception handling */
2675 if (ecb_expect_false (CORO_THROW))
2676 {
2677 SV *exception = sv_2mortal (CORO_THROW);
2678
2679 CORO_THROW = 0;
2680 sv_setsv (ERRSV, exception);
2681 croak (0);
2682 }
2683
2684 /* return value handling - mostly like entersub */
2685 /* make sure we put something on the stack in scalar context */
2686 if (GIMME_V == G_SCALAR
2687 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2688 {
2689 dSP;
2690 SV **bot = PL_stack_base + checkmark;
2691
2692 if (sp == bot) /* too few, push undef */
2693 bot [1] = &PL_sv_undef;
2694 else /* too many, take last one */
2695 bot [1] = *sp;
2696
2697 SP = bot + 1;
2698
2699 PUTBACK;
2700 }
2701
2702 return NORMAL;
2703}
2704
2705static void
2706api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2707{
2708 int i;
2709 SV **arg = PL_stack_base + ax;
2710 int items = PL_stack_sp - arg + 1;
2711
2712 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2713
2714 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2715 && PL_op->op_ppaddr != pp_slf)
2716 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2717
2718 CvFLAGS (cv) |= CVf_SLF;
2719 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2720 slf_cv = cv;
2721
2722 /* we patch the op, and then re-run the whole call */
2723 /* we have to put the same argument on the stack for this to work */
2724 /* and this will be done by pp_restore */
2725 slf_restore.op_next = (OP *)&slf_restore;
2726 slf_restore.op_type = OP_CUSTOM;
2727 slf_restore.op_ppaddr = pp_restore;
2728 slf_restore.op_first = PL_op;
2729
2730 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2731
2732 if (PL_op->op_flags & OPf_STACKED)
2733 {
2734 if (items > slf_arga)
2735 {
2736 slf_arga = items;
2737 Safefree (slf_argv);
2738 New (0, slf_argv, slf_arga, SV *);
2739 }
2740
2741 slf_argc = items;
2742
2743 for (i = 0; i < items; ++i)
2744 slf_argv [i] = SvREFCNT_inc (arg [i]);
2745 }
2746 else
2747 slf_argc = 0;
2748
2749 PL_op->op_ppaddr = pp_slf;
2750 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2751
2752 PL_op = (OP *)&slf_restore;
2753}
2754
2755/*****************************************************************************/
2756/* dynamic wind */
2757
2758static void
2759on_enterleave_call (pTHX_ SV *cb)
2760{
2761 dSP;
2762
2763 PUSHSTACK;
2764
2765 PUSHMARK (SP);
2766 PUTBACK;
2767 call_sv (cb, G_VOID | G_DISCARD);
2768 SPAGAIN;
2769
2770 POPSTACK;
2771}
2772
2773static SV *
2774coro_avp_pop_and_free (pTHX_ AV **avp)
2775{
2776 AV *av = *avp;
2777 SV *res = av_pop (av);
2778
2779 if (AvFILLp (av) < 0)
2780 {
2781 *avp = 0;
2782 SvREFCNT_dec (av);
2783 }
2784
2785 return res;
2786}
2787
2788static void
2789coro_pop_on_enter (pTHX_ void *coro)
2790{
2791 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2792 SvREFCNT_dec (cb);
2793}
2794
2795static void
2796coro_pop_on_leave (pTHX_ void *coro)
2797{
2798 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2799 on_enterleave_call (aTHX_ sv_2mortal (cb));
2800}
2801
2802/*****************************************************************************/
2803/* PerlIO::cede */
2804
2805typedef struct
2806{
2807 PerlIOBuf base;
2808 NV next, every;
2809} PerlIOCede;
2810
2811static IV ecb_cold
2812PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815
2816 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2817 self->next = nvtime () + self->every;
2818
2819 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2820}
2821
2822static SV * ecb_cold
2823PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2824{
2825 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2826
2827 return newSVnv (self->every);
2828}
2829
2830static IV
2831PerlIOCede_flush (pTHX_ PerlIO *f)
2832{
2833 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2834 double now = nvtime ();
2835
2836 if (now >= self->next)
2837 {
2838 api_cede (aTHX);
2839 self->next = now + self->every;
2840 }
2841
2842 return PerlIOBuf_flush (aTHX_ f);
2843}
2844
2845static PerlIO_funcs PerlIO_cede =
2846{
2847 sizeof(PerlIO_funcs),
2848 "cede",
2849 sizeof(PerlIOCede),
2850 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2851 PerlIOCede_pushed,
2852 PerlIOBuf_popped,
2853 PerlIOBuf_open,
2854 PerlIOBase_binmode,
2855 PerlIOCede_getarg,
2856 PerlIOBase_fileno,
2857 PerlIOBuf_dup,
2858 PerlIOBuf_read,
2859 PerlIOBuf_unread,
2860 PerlIOBuf_write,
2861 PerlIOBuf_seek,
2862 PerlIOBuf_tell,
2863 PerlIOBuf_close,
2864 PerlIOCede_flush,
2865 PerlIOBuf_fill,
2866 PerlIOBase_eof,
2867 PerlIOBase_error,
2868 PerlIOBase_clearerr,
2869 PerlIOBase_setlinebuf,
2870 PerlIOBuf_get_base,
2871 PerlIOBuf_bufsiz,
2872 PerlIOBuf_get_ptr,
2873 PerlIOBuf_get_cnt,
2874 PerlIOBuf_set_ptrcnt,
2875};
2876
2877/*****************************************************************************/
2878/* Coro::Semaphore & Coro::Signal */
2879
2880static SV *
2881coro_waitarray_new (pTHX_ int count)
2882{
2883 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2884 AV *av = newAV ();
2885 SV **ary;
2886
2887 /* unfortunately, building manually saves memory */
2888 Newx (ary, 2, SV *);
2889 AvALLOC (av) = ary;
2890#if PERL_VERSION_ATLEAST (5,10,0)
2891 AvARRAY (av) = ary;
2892#else
2893 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2894 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2895 SvPVX ((SV *)av) = (char *)ary;
2896#endif
2897 AvMAX (av) = 1;
2898 AvFILLp (av) = 0;
2899 ary [0] = newSViv (count);
2900
2901 return newRV_noinc ((SV *)av);
2902}
2903
2904/* semaphore */
2905
2906static void
2907coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2908{
2909 SV *count_sv = AvARRAY (av)[0];
2910 IV count = SvIVX (count_sv);
2911
2912 count += adjust;
2913 SvIVX (count_sv) = count;
2914
2915 /* now wake up as many waiters as are expected to lock */
2916 while (count > 0 && AvFILLp (av) > 0)
2917 {
2918 SV *cb;
2919
2920 /* swap first two elements so we can shift a waiter */
2921 AvARRAY (av)[0] = AvARRAY (av)[1];
2922 AvARRAY (av)[1] = count_sv;
2923 cb = av_shift (av);
2924
2925 if (SvOBJECT (cb))
2926 {
2927 api_ready (aTHX_ cb);
2928 --count;
2929 }
2930 else if (SvTYPE (cb) == SVt_PVCV)
2931 {
2932 dSP;
2933 PUSHMARK (SP);
2934 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2935 PUTBACK;
2936 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2937 }
2938
2939 SvREFCNT_dec (cb);
2940 }
2941}
2942
2943static void
2944coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2945{
2946 /* call $sem->adjust (0) to possibly wake up some other waiters */
2947 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2948}
2949
2950static int
2951slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2952{
2953 AV *av = (AV *)frame->data;
2954 SV *count_sv = AvARRAY (av)[0];
2955 SV *coro_hv = SvRV (coro_current);
2956
2957 /* if we are about to throw, don't actually acquire the lock, just throw */
2958 if (CORO_THROW)
2959 return 0;
2960 else if (SvIVX (count_sv) > 0)
2961 {
2962 frame->destroy = 0;
2963
2964 if (acquire)
2965 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2966 else
2967 coro_semaphore_adjust (aTHX_ av, 0);
2968
2969 return 0;
2970 }
2971 else
2972 {
2973 int i;
2974 /* if we were woken up but can't down, we look through the whole */
2975 /* waiters list and only add us if we aren't in there already */
2976 /* this avoids some degenerate memory usage cases */
2977 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2978 if (AvARRAY (av)[i] == coro_hv)
2979 return 1;
2980
2981 av_push (av, SvREFCNT_inc (coro_hv));
2982 return 1;
2983 }
2984}
2985
2986static int
2987slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2988{
2989 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2990}
2991
2992static int
2993slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2994{
2995 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2996}
2997
2998static void
2999slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3000{
3001 AV *av = (AV *)SvRV (arg [0]);
3002
3003 if (SvIVX (AvARRAY (av)[0]) > 0)
3004 {
3005 frame->data = (void *)av;
3006 frame->prepare = prepare_nop;
3007 }
3008 else
3009 {
3010 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3011
3012 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3013 frame->prepare = prepare_schedule;
3014 /* to avoid race conditions when a woken-up coro gets terminated */
3015 /* we arrange for a temporary on_destroy that calls adjust (0) */
3016 frame->destroy = coro_semaphore_destroy;
3017 }
3018}
3019
3020static void
3021slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3022{
3023 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3024 frame->check = slf_check_semaphore_down;
3025}
3026
3027static void
3028slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3029{
3030 if (items >= 2)
3031 {
3032 /* callback form */
3033 AV *av = (AV *)SvRV (arg [0]);
3034 SV *cb_cv = s_get_cv_croak (arg [1]);
3035
3036 av_push (av, SvREFCNT_inc_NN (cb_cv));
3037
3038 if (SvIVX (AvARRAY (av)[0]) > 0)
3039 coro_semaphore_adjust (aTHX_ av, 0);
3040
3041 frame->prepare = prepare_nop;
3042 frame->check = slf_check_nop;
3043 }
3044 else
3045 {
3046 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3047 frame->check = slf_check_semaphore_wait;
3048 }
3049}
3050
3051/* signal */
3052
3053static void
3054coro_signal_wake (pTHX_ AV *av, int count)
3055{
3056 SvIVX (AvARRAY (av)[0]) = 0;
3057
3058 /* now signal count waiters */
3059 while (count > 0 && AvFILLp (av) > 0)
3060 {
3061 SV *cb;
3062
3063 /* swap first two elements so we can shift a waiter */
3064 cb = AvARRAY (av)[0];
3065 AvARRAY (av)[0] = AvARRAY (av)[1];
3066 AvARRAY (av)[1] = cb;
3067
3068 cb = av_shift (av);
3069
3070 if (SvTYPE (cb) == SVt_PVCV)
3071 {
3072 dSP;
3073 PUSHMARK (SP);
3074 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3075 PUTBACK;
3076 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3077 }
3078 else
3079 {
3080 api_ready (aTHX_ cb);
3081 sv_setiv (cb, 0); /* signal waiter */
3082 }
3083
3084 SvREFCNT_dec (cb);
3085
3086 --count;
3087 }
3088}
3089
3090static int
3091slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3092{
3093 /* if we are about to throw, also stop waiting */
3094 return SvROK ((SV *)frame->data) && !CORO_THROW;
3095}
3096
3097static void
3098slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3099{
3100 AV *av = (AV *)SvRV (arg [0]);
3101
3102 if (items >= 2)
3103 {
3104 SV *cb_cv = s_get_cv_croak (arg [1]);
3105 av_push (av, SvREFCNT_inc_NN (cb_cv));
3106
3107 if (SvIVX (AvARRAY (av)[0]))
3108 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3109
3110 frame->prepare = prepare_nop;
3111 frame->check = slf_check_nop;
3112 }
3113 else if (SvIVX (AvARRAY (av)[0]))
3114 {
3115 SvIVX (AvARRAY (av)[0]) = 0;
3116 frame->prepare = prepare_nop;
3117 frame->check = slf_check_nop;
3118 }
3119 else
3120 {
3121 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3122
3123 av_push (av, waiter);
3124
3125 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3126 frame->prepare = prepare_schedule;
3127 frame->check = slf_check_signal_wait;
3128 }
3129}
3130
3131/*****************************************************************************/
3132/* Coro::AIO */
3133
3134#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3135
3136/* helper storage struct */
3137struct io_state
3138{
3139 int errorno;
3140 I32 laststype; /* U16 in 5.10.0 */
3141 int laststatval;
3142 Stat_t statcache;
3143};
3144
3145static void
3146coro_aio_callback (pTHX_ CV *cv)
3147{
3148 dXSARGS;
3149 AV *state = (AV *)S_GENSUB_ARG;
3150 SV *coro = av_pop (state);
3151 SV *data_sv = newSV (sizeof (struct io_state));
3152
3153 av_extend (state, items - 1);
3154
3155 sv_upgrade (data_sv, SVt_PV);
3156 SvCUR_set (data_sv, sizeof (struct io_state));
3157 SvPOK_only (data_sv);
3158
3159 {
3160 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3161
3162 data->errorno = errno;
3163 data->laststype = PL_laststype;
3164 data->laststatval = PL_laststatval;
3165 data->statcache = PL_statcache;
3166 }
3167
3168 /* now build the result vector out of all the parameters and the data_sv */
3169 {
3170 int i;
3171
3172 for (i = 0; i < items; ++i)
3173 av_push (state, SvREFCNT_inc_NN (ST (i)));
3174 }
3175
3176 av_push (state, data_sv);
3177
3178 api_ready (aTHX_ coro);
3179 SvREFCNT_dec (coro);
3180 SvREFCNT_dec ((AV *)state);
3181}
3182
3183static int
3184slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3185{
3186 AV *state = (AV *)frame->data;
3187
3188 /* if we are about to throw, return early */
3189 /* this does not cancel the aio request, but at least */
3190 /* it quickly returns */
3191 if (CORO_THROW)
3192 return 0;
3193
3194 /* one element that is an RV? repeat! */
3195 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3196 return 1;
3197
3198 /* restore status */
3199 {
3200 SV *data_sv = av_pop (state);
3201 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3202
3203 errno = data->errorno;
3204 PL_laststype = data->laststype;
3205 PL_laststatval = data->laststatval;
3206 PL_statcache = data->statcache;
3207
3208 SvREFCNT_dec (data_sv);
3209 }
3210
3211 /* push result values */
3212 {
3213 dSP;
3214 int i;
3215
3216 EXTEND (SP, AvFILLp (state) + 1);
3217 for (i = 0; i <= AvFILLp (state); ++i)
3218 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3219
3220 PUTBACK;
3221 }
830 3222
831 return 0; 3223 return 0;
832} 3224}
833 3225
834static void 3226static void
835api_ready (SV *coro) 3227slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
836{ 3228{
837 coro_enq (SvREFCNT_inc (coro)); 3229 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
838} 3230 SV *coro_hv = SvRV (coro_current);
3231 struct coro *coro = SvSTATE_hv (coro_hv);
839 3232
840static void 3233 /* put our coroutine id on the state arg */
841api_schedule (int cede) 3234 av_push (state, SvREFCNT_inc_NN (coro_hv));
842{
843 SV *prev, *next;
844 3235
845 prev = GvSV (coro_current); 3236 /* first see whether we have a non-zero priority and set it as AIO prio */
3237 if (coro->prio)
3238 {
3239 dSP;
846 3240
847 if (cede) 3241 static SV *prio_cv;
848 coro_enq (SvREFCNT_inc (prev)); 3242 static SV *prio_sv;
849 3243
850 next = coro_deq (PRIO_MIN); 3244 if (ecb_expect_false (!prio_cv))
3245 {
3246 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3247 prio_sv = newSViv (0);
3248 }
851 3249
852 if (!next) 3250 PUSHMARK (SP);
853 next = SvREFCNT_inc (GvSV (coro_idle)); 3251 sv_setiv (prio_sv, coro->prio);
3252 XPUSHs (prio_sv);
854 3253
855 GvSV (coro_current) = SvREFCNT_inc (next); 3254 PUTBACK;
856 transfer (aTHX_ 3255 call_sv (prio_cv, G_VOID | G_DISCARD);
857 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3256 }
858 sv_to_coro (next, "Coro::schedule", "next coroutine"),
859 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
860 SvREFCNT_dec (next);
861 SvREFCNT_dec (prev);
862}
863 3257
3258 /* now call the original request */
3259 {
3260 dSP;
3261 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3262 int i;
3263
3264 PUSHMARK (SP);
3265
3266 /* first push all args to the stack */
3267 EXTEND (SP, items + 1);
3268
3269 for (i = 0; i < items; ++i)
3270 PUSHs (arg [i]);
3271
3272 /* now push the callback closure */
3273 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3274
3275 /* now call the AIO function - we assume our request is uncancelable */
3276 PUTBACK;
3277 call_sv ((SV *)req, G_VOID | G_DISCARD);
3278 }
3279
3280 /* now that the request is going, we loop till we have a result */
3281 frame->data = (void *)state;
3282 frame->prepare = prepare_schedule;
3283 frame->check = slf_check_aio_req;
3284}
3285
3286static void
3287coro_aio_req_xs (pTHX_ CV *cv)
3288{
3289 dXSARGS;
3290
3291 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3292
3293 XSRETURN_EMPTY;
3294}
3295
3296/*****************************************************************************/
3297
3298#if CORO_CLONE
3299# include "clone.c"
3300#endif
3301
3302/*****************************************************************************/
3303
3304static SV *
3305coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3306{
3307 SV *coro_sv;
3308 struct coro *coro;
3309 MAGIC *mg;
3310 HV *hv;
3311 SV *cb;
3312 int i;
3313
3314 if (argc > 0)
3315 {
3316 cb = s_get_cv_croak (argv [0]);
3317
3318 if (!is_coro)
3319 {
3320 if (CvISXSUB (cb))
3321 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3322
3323 if (!CvROOT (cb))
3324 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3325 }
3326 }
3327
3328 Newz (0, coro, 1, struct coro);
3329 coro->args = newAV ();
3330 coro->flags = CF_NEW;
3331
3332 if (coro_first) coro_first->prev = coro;
3333 coro->next = coro_first;
3334 coro_first = coro;
3335
3336 coro->hv = hv = newHV ();
3337 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3338 mg->mg_flags |= MGf_DUP;
3339 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3340
3341 if (argc > 0)
3342 {
3343 av_extend (coro->args, argc + is_coro - 1);
3344
3345 if (is_coro)
3346 {
3347 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3348 cb = (SV *)cv_coro_run;
3349 }
3350
3351 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3352
3353 for (i = 1; i < argc; i++)
3354 av_push (coro->args, newSVsv (argv [i]));
3355 }
3356
3357 return coro_sv;
3358}
3359
3360#ifndef __cplusplus
3361ecb_cold XS(boot_Coro__State);
3362#endif
3363
3364#if CORO_JIT
3365
3366static void ecb_noinline ecb_cold
3367pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3368{
3369 dSP;
3370 AV *av = newAV ();
3371
3372 av_store (av, 3, newSVuv (d));
3373 av_store (av, 2, newSVuv (c));
3374 av_store (av, 1, newSVuv (b));
3375 av_store (av, 0, newSVuv (a));
3376
3377 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3378
3379 PUTBACK;
3380}
3381
3382static void ecb_noinline ecb_cold
3383jit_init (pTHX)
3384{
3385 dSP;
3386 SV *load, *save;
3387 char *map_base;
3388 char *load_ptr, *save_ptr;
3389 STRLEN load_len, save_len, map_len;
3390 int count;
3391
3392 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3393
3394 PUSHMARK (SP);
3395#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3396# include "state.h"
3397#undef VARx
3398 count = call_pv ("Coro::State::_jit", G_ARRAY);
3399 SPAGAIN;
3400
3401 save = POPs; save_ptr = SvPVbyte (save, save_len);
3402 load = POPs; load_ptr = SvPVbyte (load, load_len);
3403
3404 map_len = load_len + save_len + 16;
3405
3406 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3407
3408 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3409
3410 load_perl_slots = (load_save_perl_slots_type)map_base;
3411 memcpy (map_base, load_ptr, load_len);
3412
3413 map_base += (load_len + 15) & ~15;
3414
3415 save_perl_slots = (load_save_perl_slots_type)map_base;
3416 memcpy (map_base, save_ptr, save_len);
3417
3418 /* we are good citizens and try to make the page read-only, so the evil evil */
3419 /* hackers might have it a bit more difficult */
3420 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3421
3422 PUTBACK;
3423 eval_pv ("undef &Coro::State::_jit", 1);
3424}
3425
3426#endif
3427
864MODULE = Coro::State PACKAGE = Coro::State 3428MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
865 3429
866PROTOTYPES: ENABLE 3430PROTOTYPES: DISABLE
867 3431
868BOOT: 3432BOOT:
869{ /* {} necessary for stoopid perl-5.6.x */ 3433{
870 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3434#ifdef USE_ITHREADS
871 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3435# if CORO_PTHREAD
3436 coro_thx = PERL_GET_CONTEXT;
3437# endif
3438#endif
3439 BOOT_PAGESIZE;
3440
3441 /* perl defines these to check for existance first, but why it doesn't */
3442 /* just create them one at init time is not clear to me, except for */
3443 /* programs trying to delete them, but... */
3444 /* anyway, we declare this as invalid and make sure they are initialised here */
3445 DEFSV;
3446 ERRSV;
3447
3448 cctx_current = cctx_new_empty ();
3449
3450 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3451 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3452
3453 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3454 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3455 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3456
3457 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3458 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3459 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3460
872 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3461 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
873 3462
874 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3463 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
875 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3464 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
876 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3465 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
877 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3466 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
878
879 if (!padlist_cache)
880 padlist_cache = newHV ();
881 3467
882 main_mainstack = PL_mainstack; 3468 main_mainstack = PL_mainstack;
3469 main_top_env = PL_top_env;
883 3470
3471 while (main_top_env->je_prev)
3472 main_top_env = main_top_env->je_prev;
3473
3474 {
3475 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3476
3477 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3478 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3479
3480 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3481 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3482 }
3483
884 coroapi.ver = CORO_API_VERSION; 3484 coroapi.ver = CORO_API_VERSION;
3485 coroapi.rev = CORO_API_REVISION;
3486
885 coroapi.transfer = api_transfer; 3487 coroapi.transfer = api_transfer;
886}
887 3488
888Coro::State 3489 coroapi.sv_state = SvSTATE_;
889_newprocess(args) 3490 coroapi.execute_slf = api_execute_slf;
890 SV * args 3491 coroapi.prepare_nop = prepare_nop;
3492 coroapi.prepare_schedule = prepare_schedule;
3493 coroapi.prepare_cede = prepare_cede;
3494 coroapi.prepare_cede_notself = prepare_cede_notself;
3495
3496 time_init (aTHX);
3497
3498 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3499#if CORO_JIT
3500 PUTBACK;
3501 jit_init (aTHX);
3502 SPAGAIN;
3503#endif
3504}
3505
3506SV *
3507new (SV *klass, ...)
3508 ALIAS:
3509 Coro::new = 1
3510 CODE:
3511 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3512 OUTPUT:
3513 RETVAL
3514
3515void
3516transfer (...)
3517 PROTOTYPE: $$
3518 CODE:
3519 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3520
3521void
3522_exit (int code)
891 PROTOTYPE: $ 3523 PROTOTYPE: $
3524 CODE:
3525 _exit (code);
3526
3527SV *
3528clone (Coro::State coro)
3529 CODE:
3530{
3531#if CORO_CLONE
3532 struct coro *ncoro = coro_clone (aTHX_ coro);
3533 MAGIC *mg;
3534 /* TODO: too much duplication */
3535 ncoro->hv = newHV ();
3536 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3537 mg->mg_flags |= MGf_DUP;
3538 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3539#else
3540 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3541#endif
3542}
3543 OUTPUT:
3544 RETVAL
3545
3546int
3547cctx_stacksize (int new_stacksize = 0)
3548 PROTOTYPE: ;$
3549 CODE:
3550 RETVAL = cctx_stacksize;
3551 if (new_stacksize)
3552 {
3553 cctx_stacksize = new_stacksize;
3554 ++cctx_gen;
3555 }
3556 OUTPUT:
3557 RETVAL
3558
3559int
3560cctx_max_idle (int max_idle = 0)
3561 PROTOTYPE: ;$
3562 CODE:
3563 RETVAL = cctx_max_idle;
3564 if (max_idle > 1)
3565 cctx_max_idle = max_idle;
3566 OUTPUT:
3567 RETVAL
3568
3569int
3570cctx_count ()
3571 PROTOTYPE:
3572 CODE:
3573 RETVAL = cctx_count;
3574 OUTPUT:
3575 RETVAL
3576
3577int
3578cctx_idle ()
3579 PROTOTYPE:
3580 CODE:
3581 RETVAL = cctx_idle;
3582 OUTPUT:
3583 RETVAL
3584
3585void
3586list ()
3587 PROTOTYPE:
3588 PPCODE:
3589{
3590 struct coro *coro;
3591 for (coro = coro_first; coro; coro = coro->next)
3592 if (coro->hv)
3593 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3594}
3595
3596void
3597call (Coro::State coro, SV *coderef)
3598 ALIAS:
3599 eval = 1
3600 CODE:
3601{
3602 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3603 {
3604 struct coro *current = SvSTATE_current;
3605 struct CoroSLF slf_save;
3606
3607 if (current != coro)
3608 {
3609 PUTBACK;
3610 save_perl (aTHX_ current);
3611 load_perl (aTHX_ coro);
3612 /* the coro is most likely in an active SLF call.
3613 * while not strictly required (the code we execute is
3614 * not allowed to call any SLF functions), it's cleaner
3615 * to reinitialise the slf_frame and restore it later.
3616 * This might one day allow us to actually do SLF calls
3617 * from code executed here.
3618 */
3619 slf_save = slf_frame;
3620 slf_frame.prepare = 0;
3621 SPAGAIN;
3622 }
3623
3624 PUSHSTACK;
3625
3626 PUSHMARK (SP);
3627 PUTBACK;
3628
3629 if (ix)
3630 eval_sv (coderef, 0);
3631 else
3632 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3633
3634 POPSTACK;
3635 SPAGAIN;
3636
3637 if (current != coro)
3638 {
3639 PUTBACK;
3640 slf_frame = slf_save;
3641 save_perl (aTHX_ coro);
3642 load_perl (aTHX_ current);
3643 SPAGAIN;
3644 }
3645 }
3646}
3647
3648SV *
3649is_ready (Coro::State coro)
3650 PROTOTYPE: $
3651 ALIAS:
3652 is_ready = CF_READY
3653 is_running = CF_RUNNING
3654 is_new = CF_NEW
3655 is_destroyed = CF_ZOMBIE
3656 is_zombie = CF_ZOMBIE
3657 is_suspended = CF_SUSPENDED
3658 CODE:
3659 RETVAL = boolSV (coro->flags & ix);
3660 OUTPUT:
3661 RETVAL
3662
3663void
3664throw (Coro::State self, SV *exception = &PL_sv_undef)
3665 PROTOTYPE: $;$
892 CODE: 3666 CODE:
893 Coro__State coro; 3667{
3668 struct coro *current = SvSTATE_current;
3669 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3670 SvREFCNT_dec (*exceptionp);
3671 SvGETMAGIC (exception);
3672 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3673}
894 3674
895 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3675void
896 croak ("Coro::State::_newprocess expects an arrayref"); 3676api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3677 PROTOTYPE: $;$
3678 C_ARGS: aTHX_ coro, flags
3679
3680SV *
3681has_cctx (Coro::State coro)
3682 PROTOTYPE: $
3683 CODE:
3684 /* maybe manage the running flag differently */
3685 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3686 OUTPUT:
3687 RETVAL
3688
3689int
3690is_traced (Coro::State coro)
3691 PROTOTYPE: $
3692 CODE:
3693 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3694 OUTPUT:
3695 RETVAL
3696
3697UV
3698rss (Coro::State coro)
3699 PROTOTYPE: $
3700 ALIAS:
3701 usecount = 1
3702 CODE:
3703 switch (ix)
3704 {
3705 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3706 case 1: RETVAL = coro->usecount; break;
897 3707 }
898 New (0, coro, 1, struct coro); 3708 OUTPUT:
899
900 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
901 coro->mainstack = 0; /* actual work is done inside transfer */
902 coro->stack = 0;
903
904 RETVAL = coro; 3709 RETVAL
3710
3711void
3712force_cctx ()
3713 PROTOTYPE:
3714 CODE:
3715 cctx_current->idle_sp = 0;
3716
3717void
3718swap_defsv (Coro::State self)
3719 PROTOTYPE: $
3720 ALIAS:
3721 swap_defav = 1
3722 CODE:
3723 if (!self->slot)
3724 croak ("cannot swap state with coroutine that has no saved state,");
3725 else
3726 {
3727 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3728 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3729
3730 SV *tmp = *src; *src = *dst; *dst = tmp;
3731 }
3732
3733void
3734cancel (Coro::State self)
3735 CODE:
3736 coro_state_destroy (aTHX_ self);
3737
3738SV *
3739enable_times (int enabled = enable_times)
3740 CODE:
3741{
3742 RETVAL = boolSV (enable_times);
3743
3744 if (enabled != enable_times)
3745 {
3746 enable_times = enabled;
3747
3748 coro_times_update ();
3749 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3750 }
3751}
905 OUTPUT: 3752 OUTPUT:
906 RETVAL 3753 RETVAL
907 3754
908void 3755void
909transfer(prev, next, flags) 3756times (Coro::State self)
910 Coro::State_or_hashref prev 3757 PPCODE:
911 Coro::State_or_hashref next 3758{
912 int flags 3759 struct coro *current = SvSTATE (coro_current);
913 PROTOTYPE: @ 3760
3761 if (ecb_expect_false (current == self))
3762 {
3763 coro_times_update ();
3764 coro_times_add (SvSTATE (coro_current));
3765 }
3766
3767 EXTEND (SP, 2);
3768 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3769 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3770
3771 if (ecb_expect_false (current == self))
3772 coro_times_sub (SvSTATE (coro_current));
3773}
3774
3775void
3776swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3777 CODE:
3778{
3779 struct coro *current = SvSTATE_current;
3780
3781 if (current == coro)
3782 SWAP_SVS (current);
3783
3784 if (!coro->swap_sv)
3785 coro->swap_sv = newAV ();
3786
3787 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3788 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3789
3790 if (current == coro)
3791 SWAP_SVS (current);
3792}
3793
3794
3795MODULE = Coro::State PACKAGE = Coro
3796
3797BOOT:
3798{
3799 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3800 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3801 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3802 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3803 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3804 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3805 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3806 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3807
3808 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3809 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3810 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3811 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3812
3813 coro_stash = gv_stashpv ("Coro", TRUE);
3814
3815 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3816 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3817 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3818 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3819 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3820 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3821
3822 {
3823 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3824
3825 coroapi.schedule = api_schedule;
3826 coroapi.schedule_to = api_schedule_to;
3827 coroapi.cede = api_cede;
3828 coroapi.cede_notself = api_cede_notself;
3829 coroapi.ready = api_ready;
3830 coroapi.is_ready = api_is_ready;
3831 coroapi.nready = coro_nready;
3832 coroapi.current = coro_current;
3833
3834 /*GCoroAPI = &coroapi;*/
3835 sv_setiv (sv, (IV)&coroapi);
3836 SvREADONLY_on (sv);
3837 }
3838}
3839
3840SV *
3841async (...)
3842 PROTOTYPE: &@
914 CODE: 3843 CODE:
915 PUTBACK; 3844 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
916 transfer (aTHX_ prev, next, flags); 3845 api_ready (aTHX_ RETVAL);
917 SPAGAIN; 3846 OUTPUT:
3847 RETVAL
918 3848
919void 3849void
920DESTROY(coro) 3850_destroy (Coro::State coro)
921 Coro::State coro 3851 CODE:
922 CODE: 3852 /* used by the manager thread */
923 3853 coro_state_destroy (aTHX_ coro);
924 if (coro->mainstack && coro->mainstack != main_mainstack)
925 {
926 struct coro temp;
927
928 PUTBACK;
929 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
930 LOAD(aTHX_ coro);
931 SPAGAIN;
932
933 destroy_stacks (aTHX);
934
935 LOAD((&temp)); /* this will get rid of defsv etc.. */
936 SPAGAIN;
937
938 coro->mainstack = 0;
939 }
940
941 deallocate_stack (coro);
942
943 Safefree (coro);
944 3854
945void 3855void
946flush() 3856on_destroy (Coro::State coro, SV *cb)
947 CODE: 3857 CODE:
948#ifdef MAY_FLUSH 3858 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
949 flush_padlist_cache ();
950#endif
951 3859
952void 3860void
953_exit(code) 3861join (...)
954 int code 3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_join);
3864
3865void
3866terminate (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3869
3870void
3871cancel (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3874
3875int
3876safe_cancel (Coro::State self, ...)
3877 C_ARGS: aTHX_ self, &ST (1), items - 1
3878
3879void
3880schedule (...)
3881 CODE:
3882 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3883
3884void
3885schedule_to (...)
3886 CODE:
3887 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3888
3889void
3890cede_to (...)
3891 CODE:
3892 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3893
3894void
3895cede (...)
3896 CODE:
3897 CORO_EXECUTE_SLF_XS (slf_init_cede);
3898
3899void
3900cede_notself (...)
3901 CODE:
3902 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3903
3904void
3905_set_current (SV *current)
955 PROTOTYPE: $ 3906 PROTOTYPE: $
956 CODE: 3907 CODE:
957#if defined(__GLIBC__) || _POSIX_C_SOURCE 3908 SvREFCNT_dec (SvRV (coro_current));
958 _exit (code); 3909 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
959#else
960 signal (SIGTERM, SIG_DFL);
961 raise (SIGTERM);
962 exit (code);
963#endif
964
965MODULE = Coro::State PACKAGE = Coro::Cont
966
967# this is slightly dirty (should expose a c-level api)
968 3910
969void 3911void
970yield(...) 3912_set_readyhook (SV *hook)
971 PROTOTYPE: @ 3913 PROTOTYPE: $
972 CODE: 3914 CODE:
973 static SV *returnstk;
974 SV *sv;
975 AV *defav = GvAV (PL_defgv);
976 struct coro *prev, *next;
977
978 if (!returnstk)
979 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
980
981 /* set up @_ -- ugly */
982 av_clear (defav);
983 av_fill (defav, items - 1);
984 while (items--)
985 av_store (defav, items, SvREFCNT_inc (ST(items)));
986
987 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
988 sv = av_pop ((AV *)SvRV (returnstk));
989 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
990 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
991 SvREFCNT_dec (sv); 3915 SvREFCNT_dec (coro_readyhook);
992 3916 SvGETMAGIC (hook);
993 transfer(aTHX_ prev, next, 0); 3917 if (SvOK (hook))
994 3918 {
995MODULE = Coro::State PACKAGE = Coro
996
997# this is slightly dirty (should expose a c-level api)
998
999BOOT:
1000{
1001 int i;
1002 HV *stash = gv_stashpv ("Coro", TRUE);
1003
1004 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1005 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1006 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1007 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1008 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1009 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1010
1011 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1012 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1013
1014 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1015 coro_ready[i] = newAV (); 3919 coro_readyhook = newSVsv (hook);
1016 3920 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1017 {
1018 SV *sv = perl_get_sv("Coro::API", 1);
1019
1020 coroapi.schedule = api_schedule;
1021 coroapi.ready = api_ready;
1022 coroapi.nready = &coro_nready;
1023 coroapi.current = coro_current;
1024
1025 GCoroAPI = &coroapi;
1026 sv_setiv(sv, (IV)&coroapi);
1027 SvREADONLY_on(sv);
1028 } 3921 }
1029} 3922 else
3923 {
3924 coro_readyhook = 0;
3925 CORO_READYHOOK = 0;
3926 }
1030 3927
1031void 3928int
3929prio (Coro::State coro, int newprio = 0)
3930 PROTOTYPE: $;$
3931 ALIAS:
3932 nice = 1
3933 CODE:
3934{
3935 RETVAL = coro->prio;
3936
3937 if (items > 1)
3938 {
3939 if (ix)
3940 newprio = coro->prio - newprio;
3941
3942 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3943 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3944
3945 coro->prio = newprio;
3946 }
3947}
3948 OUTPUT:
3949 RETVAL
3950
3951SV *
1032ready(self) 3952ready (SV *self)
1033 SV * self 3953 PROTOTYPE: $
1034 CODE: 3954 CODE:
1035 api_ready (self); 3955 RETVAL = boolSV (api_ready (aTHX_ self));
3956 OUTPUT:
3957 RETVAL
1036 3958
1037int 3959int
1038nready(...) 3960nready (...)
1039 PROTOTYPE: 3961 PROTOTYPE:
1040 CODE: 3962 CODE:
1041 RETVAL = coro_nready; 3963 RETVAL = coro_nready;
1042 OUTPUT: 3964 OUTPUT:
1043 RETVAL 3965 RETVAL
1044 3966
1045void 3967void
1046schedule(...) 3968suspend (Coro::State self)
1047 PROTOTYPE: 3969 PROTOTYPE: $
1048 ALIAS:
1049 cede = 1
1050 CODE: 3970 CODE:
1051 api_schedule (ix); 3971 self->flags |= CF_SUSPENDED;
1052 3972
3973void
3974resume (Coro::State self)
3975 PROTOTYPE: $
3976 CODE:
3977 self->flags &= ~CF_SUSPENDED;
3978
3979void
3980_pool_handler (...)
3981 CODE:
3982 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3983
3984void
3985async_pool (SV *cv, ...)
3986 PROTOTYPE: &@
3987 PPCODE:
3988{
3989 HV *hv = (HV *)av_pop (av_async_pool);
3990 AV *av = newAV ();
3991 SV *cb = ST (0);
3992 int i;
3993
3994 av_extend (av, items - 2);
3995 for (i = 1; i < items; ++i)
3996 av_push (av, SvREFCNT_inc_NN (ST (i)));
3997
3998 if ((SV *)hv == &PL_sv_undef)
3999 {
4000 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4001 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4002 SvREFCNT_dec (sv);
4003 }
4004
4005 {
4006 struct coro *coro = SvSTATE_hv (hv);
4007
4008 assert (!coro->invoke_cb);
4009 assert (!coro->invoke_av);
4010 coro->invoke_cb = SvREFCNT_inc (cb);
4011 coro->invoke_av = av;
4012 }
4013
4014 api_ready (aTHX_ (SV *)hv);
4015
4016 if (GIMME_V != G_VOID)
4017 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4018 else
4019 SvREFCNT_dec (hv);
4020}
4021
4022SV *
4023rouse_cb ()
4024 PROTOTYPE:
4025 CODE:
4026 RETVAL = coro_new_rouse_cb (aTHX);
4027 OUTPUT:
4028 RETVAL
4029
4030void
4031rouse_wait (...)
4032 PROTOTYPE: ;$
4033 PPCODE:
4034 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4035
4036void
4037on_enter (SV *block)
4038 ALIAS:
4039 on_leave = 1
4040 PROTOTYPE: &
4041 CODE:
4042{
4043 struct coro *coro = SvSTATE_current;
4044 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4045
4046 block = s_get_cv_croak (block);
4047
4048 if (!*avp)
4049 *avp = newAV ();
4050
4051 av_push (*avp, SvREFCNT_inc (block));
4052
4053 if (!ix)
4054 on_enterleave_call (aTHX_ block);
4055
4056 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4057 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4058 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4059}
4060
4061
4062MODULE = Coro::State PACKAGE = PerlIO::cede
4063
4064BOOT:
4065 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4066
4067
4068MODULE = Coro::State PACKAGE = Coro::Semaphore
4069
4070SV *
4071new (SV *klass, SV *count = 0)
4072 CODE:
4073{
4074 int semcnt = 1;
4075
4076 if (count)
4077 {
4078 SvGETMAGIC (count);
4079
4080 if (SvOK (count))
4081 semcnt = SvIV (count);
4082 }
4083
4084 RETVAL = sv_bless (
4085 coro_waitarray_new (aTHX_ semcnt),
4086 GvSTASH (CvGV (cv))
4087 );
4088}
4089 OUTPUT:
4090 RETVAL
4091
4092# helper for Coro::Channel and others
4093SV *
4094_alloc (int count)
4095 CODE:
4096 RETVAL = coro_waitarray_new (aTHX_ count);
4097 OUTPUT:
4098 RETVAL
4099
4100SV *
4101count (SV *self)
4102 CODE:
4103 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4104 OUTPUT:
4105 RETVAL
4106
4107void
4108up (SV *self, int adjust = 1)
4109 ALIAS:
4110 adjust = 1
4111 CODE:
4112 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4113
4114void
4115down (...)
4116 CODE:
4117 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4118
4119void
4120wait (...)
4121 CODE:
4122 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4123
4124void
4125try (SV *self)
4126 PPCODE:
4127{
4128 AV *av = (AV *)SvRV (self);
4129 SV *count_sv = AvARRAY (av)[0];
4130 IV count = SvIVX (count_sv);
4131
4132 if (count > 0)
4133 {
4134 --count;
4135 SvIVX (count_sv) = count;
4136 XSRETURN_YES;
4137 }
4138 else
4139 XSRETURN_NO;
4140}
4141
4142void
4143waiters (SV *self)
4144 PPCODE:
4145{
4146 AV *av = (AV *)SvRV (self);
4147 int wcount = AvFILLp (av) + 1 - 1;
4148
4149 if (GIMME_V == G_SCALAR)
4150 XPUSHs (sv_2mortal (newSViv (wcount)));
4151 else
4152 {
4153 int i;
4154 EXTEND (SP, wcount);
4155 for (i = 1; i <= wcount; ++i)
4156 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4157 }
4158}
4159
4160MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4161
4162void
4163_may_delete (SV *sem, int count, unsigned int extra_refs)
4164 PPCODE:
4165{
4166 AV *av = (AV *)SvRV (sem);
4167
4168 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4169 && AvFILLp (av) == 0 /* no waiters, just count */
4170 && SvIV (AvARRAY (av)[0]) == count)
4171 XSRETURN_YES;
4172
4173 XSRETURN_NO;
4174}
4175
4176MODULE = Coro::State PACKAGE = Coro::Signal
4177
4178SV *
4179new (SV *klass)
4180 CODE:
4181 RETVAL = sv_bless (
4182 coro_waitarray_new (aTHX_ 0),
4183 GvSTASH (CvGV (cv))
4184 );
4185 OUTPUT:
4186 RETVAL
4187
4188void
4189wait (...)
4190 CODE:
4191 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4192
4193void
4194broadcast (SV *self)
4195 CODE:
4196{
4197 AV *av = (AV *)SvRV (self);
4198 coro_signal_wake (aTHX_ av, AvFILLp (av));
4199}
4200
4201void
4202send (SV *self)
4203 CODE:
4204{
4205 AV *av = (AV *)SvRV (self);
4206
4207 if (AvFILLp (av))
4208 coro_signal_wake (aTHX_ av, 1);
4209 else
4210 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4211}
4212
4213IV
4214awaited (SV *self)
4215 CODE:
4216 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4217 OUTPUT:
4218 RETVAL
4219
4220
4221MODULE = Coro::State PACKAGE = Coro::AnyEvent
4222
4223BOOT:
4224 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4225
4226void
4227_schedule (...)
4228 CODE:
4229{
4230 static int incede;
4231
4232 api_cede_notself (aTHX);
4233
4234 ++incede;
4235 while (coro_nready >= incede && api_cede (aTHX))
4236 ;
4237
4238 sv_setsv (sv_activity, &PL_sv_undef);
4239 if (coro_nready >= incede)
4240 {
4241 PUSHMARK (SP);
4242 PUTBACK;
4243 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4244 }
4245
4246 --incede;
4247}
4248
4249
4250MODULE = Coro::State PACKAGE = Coro::AIO
4251
4252void
4253_register (char *target, char *proto, SV *req)
4254 CODE:
4255{
4256 SV *req_cv = s_get_cv_croak (req);
4257 /* newXSproto doesn't return the CV on 5.8 */
4258 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4259 sv_setpv ((SV *)slf_cv, proto);
4260 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4261}
4262
4263MODULE = Coro::State PACKAGE = Coro::Select
4264
4265void
4266patch_pp_sselect ()
4267 CODE:
4268 if (!coro_old_pp_sselect)
4269 {
4270 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4271 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4272 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4273 }
4274
4275void
4276unpatch_pp_sselect ()
4277 CODE:
4278 if (coro_old_pp_sselect)
4279 {
4280 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4281 coro_old_pp_sselect = 0;
4282 }
4283

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