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Comparing Coro/Coro/State.xs (file contents):
Revision 1.33 by root, Sun Aug 26 21:44:20 2001 UTC vs.
Revision 1.410 by root, Sun Jun 12 08:14:12 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
55# endif
56#else
57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
19#endif 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 !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
27 * to the current C stack pointer. Its property is that it changes with each call 69# undef CORO_STACKGUARD
28 * and should be unique. */ 70#endif
71
72#ifndef CORO_STACKGUARD
73# define CORO_STACKGUARD 0
74#endif
75
76/* prefer perl internal functions over our own? */
77#ifndef CORO_PREFER_PERL_FUNCTIONS
78# define CORO_PREFER_PERL_FUNCTIONS 0
79#endif
80
81/* The next macros try to return the current stack pointer, in an as
82 * portable way as possible. */
83#if __GNUC__ >= 4
84# define dSTACKLEVEL int stacklevel_dummy
85# define STACKLEVEL __builtin_frame_address (0)
86#else
87# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 88# define STACKLEVEL ((void *)&stacklevel)
89#endif
30 90
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 91#define IN_DESTRUCT PL_dirty
32 92
33#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
34 95
96#ifdef USE_ITHREADS
97# if CORO_PTHREAD
98static void *coro_thx;
99# endif
100#endif
101
102/* used in state.h */
103#define VAR(name,type) VARx(name, PL_ ## name, type)
104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
122
123static U32 cctx_gen;
124static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
126static AV *main_mainstack; /* used to differentiate between $main and others */
127static JMPENV *main_top_env;
128static HV *coro_state_stash, *coro_stash;
129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 130
37/* this is actually not only the c stack but also c registers etc... */ 131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
134
135static GV *irsgv; /* $/ */
136static GV *stdoutgv; /* *STDOUT */
137static SV *rv_diehook;
138static SV *rv_warnhook;
139static HV *hv_sig; /* %SIG */
140
141/* async_pool helper stuff */
142static SV *sv_pool_rss;
143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157
158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle;
160
161enum
162{
163 CC_MAPPED = 0x01,
164 CC_NOREUSE = 0x02, /* throw this away after tracing */
165 CC_TRACE = 0x04,
166 CC_TRACE_SUB = 0x08, /* trace sub calls */
167 CC_TRACE_LINE = 0x10, /* trace each statement */
168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
169};
170
171/* this is a structure representing a c-level coroutine */
38typedef struct { 172typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 173{
40 int usecnt; /* shared by how many coroutines */ 174 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 175
176 /* the stack */
177 void *sptr;
178 size_t ssize;
179
180 /* cpu state */
181 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
182 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
183 JMPENV *top_env;
43 coro_context cctx; 184 coro_context cctx;
44 185
45 void *sptr; 186 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 187#if CORO_USE_VALGRIND
47} coro_stack; 188 int valgrind_id;
189#endif
190 unsigned char flags;
191} coro_cctx;
48 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
199enum
200{
201 CF_RUNNING = 0x0001, /* coroutine is running */
202 CF_READY = 0x0002, /* coroutine is ready */
203 CF_NEW = 0x0004, /* has never been switched to */
204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
207};
208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212#define VARx(name,expr,type) type name;
213# include "state.h"
214#undef VARx
215} perl_slots;
216
217/* how many context stack entries do we need for perl_slots */
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219
220/* this is a structure representing a perl-level coroutine */
49struct coro { 221struct coro
50 /* the optional C context */ 222{
51 coro_stack *stack; 223 /* the C coroutine allocated to this perl coroutine, if any */
52 void *cursp; 224 coro_cctx *cctx;
53 int gencnt;
54 225
55 /* optionally saved, might be zero */ 226 /* ready queue */
56 AV *defav; 227 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;
63 228
64 /* the stacks and related info (callchain etc..) */ 229 /* state data */
65 PERL_SI *curstackinfo; 230 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 231 AV *mainstack;
68 SV **stack_sp; 232 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;
91 233
234 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 236 int flags; /* CF_ flags */
237 HV *hv; /* the perl hash associated with this coro, if any */
238
239 /* statistics */
240 int usecount; /* number of transfers to this coro */
241
242 /* coro process data */
243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
248
249 /* async_pool */
250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
263
264 /* linked list */
265 struct coro *next, *prev;
94}; 266};
95 267
96typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
98 270
99static AV *main_mainstack; /* used to differentiate between $main and others */ 271/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 272/* and get copied between struct coro and these variables */
273/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275
276/** Coro ********************************************************************/
277
278#define CORO_PRIO_MAX 3
279#define CORO_PRIO_HIGH 1
280#define CORO_PRIO_NORMAL 0
281#define CORO_PRIO_LOW -1
282#define CORO_PRIO_IDLE -3
283#define CORO_PRIO_MIN -4
284
285/* for Coro.pm */
286static SV *coro_current;
287static SV *coro_readyhook;
288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 /* APPLE doesn't have HAVE_MMAP though */
297 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
298 #ifndef CORO_JIT_TYPE
299 #if __x86_64 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "amd64-unix"
301 #elif __i386 && CORO_JIT_UNIXY
302 #define CORO_JIT_TYPE "x86-unix"
303 #endif
304 #endif
305#endif
306
307#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
308 #undef CORO_JIT
309#endif
310
311#if CORO_JIT
312 typedef void (*load_save_perl_slots_type)(perl_slots *);
313 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
314#endif
315
316/** Coro::Select ************************************************************/
317
318static OP *(*coro_old_pp_sselect) (pTHX);
101static SV *ucoro_state_sv; 319static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 320
105/* mostly copied from op.c:cv_clone2 */ 321/* horrible hack, but if it works... */
106STATIC AV * 322static OP *
107clone_padlist (AV *protopadlist) 323coro_pp_sselect (pTHX)
108{ 324{
109 AV *av; 325 dSP;
110 I32 ix; 326 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 327 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 328 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 329
114 SV **ppad = AvARRAY (protopad); 330 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 331 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 332 PL_op->op_private = 0;
333 return PL_ppaddr [OP_ENTERSUB](aTHX);
334}
335
336/** time stuff **************************************************************/
337
338#ifdef HAS_GETTIMEOFDAY
339
340ECB_INLINE void
341coro_u2time (pTHX_ UV ret[2])
342{
343 struct timeval tv;
344 gettimeofday (&tv, 0);
345
346 ret [0] = tv.tv_sec;
347 ret [1] = tv.tv_usec;
348}
349
350ECB_INLINE double
351coro_nvtime (void)
352{
353 struct timeval tv;
354 gettimeofday (&tv, 0);
355
356 return tv.tv_sec + tv.tv_usec * 1e-6;
357}
358
359ECB_INLINE void
360time_init (pTHX)
361{
362 nvtime = coro_nvtime;
363 u2time = coro_u2time;
364}
365
366#else
367
368ECB_INLINE void
369time_init (pTHX)
370{
371 SV **svp;
372
373 require_pv ("Time/HiRes.pm");
374
375 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
376
377 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
378 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
379
380 nvtime = INT2PTR (double (*)(), SvIV (*svp));
381
382 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
383 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
384}
385
386#endif
387
388/** lowlevel stuff **********************************************************/
389
390static SV * ecb_noinline
391coro_get_sv (pTHX_ const char *name, int create)
392{
393#if PERL_VERSION_ATLEAST (5,10,0)
394 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
395 get_sv (name, create);
396#endif
397 return get_sv (name, create);
398}
399
400static AV * ecb_noinline
401coro_get_av (pTHX_ const char *name, int create)
402{
403#if PERL_VERSION_ATLEAST (5,10,0)
404 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
405 get_av (name, create);
406#endif
407 return get_av (name, create);
408}
409
410static HV * ecb_noinline
411coro_get_hv (pTHX_ const char *name, int create)
412{
413#if PERL_VERSION_ATLEAST (5,10,0)
414 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
415 get_hv (name, create);
416#endif
417 return get_hv (name, create);
418}
419
420ECB_INLINE void
421coro_times_update (void)
422{
423#ifdef coro_clock_gettime
424 struct timespec ts;
425
426 ts.tv_sec = ts.tv_nsec = 0;
427 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
428 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
432 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
433#else
434 dTHX;
435 UV tv[2];
436
437 u2time (aTHX_ tv);
438 time_real [0] = tv [0];
439 time_real [1] = tv [1] * 1000;
440#endif
441}
442
443ECB_INLINE void
444coro_times_add (struct coro *c)
445{
446 c->t_real [1] += time_real [1];
447 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
448 c->t_real [0] += time_real [0];
449
450 c->t_cpu [1] += time_cpu [1];
451 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
452 c->t_cpu [0] += time_cpu [0];
453}
454
455ECB_INLINE void
456coro_times_sub (struct coro *c)
457{
458 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
459 c->t_real [1] -= time_real [1];
460 c->t_real [0] -= time_real [0];
461
462 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
463 c->t_cpu [1] -= time_cpu [1];
464 c->t_cpu [0] -= time_cpu [0];
465}
466
467/*****************************************************************************/
468/* magic glue */
469
470#define CORO_MAGIC_type_cv 26
471#define CORO_MAGIC_type_state PERL_MAGIC_ext
472
473#define CORO_MAGIC_NN(sv, type) \
474 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
475 ? SvMAGIC (sv) \
476 : mg_find (sv, type))
477
478#define CORO_MAGIC(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)) \
480 ? CORO_MAGIC_NN (sv, type) \
481 : 0)
482
483#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
484#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
485
486ECB_INLINE MAGIC *
487SvSTATEhv_p (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (ecb_expect_true (
492 SvTYPE (coro) == SVt_PVHV
493 && (mg = CORO_MAGIC_state (coro))
494 && mg->mg_virtual == &coro_state_vtbl
495 ))
496 return mg;
497
498 return 0;
499}
500
501ECB_INLINE struct coro *
502SvSTATE_ (pTHX_ SV *coro)
503{
504 MAGIC *mg;
505
506 if (SvROK (coro))
507 coro = SvRV (coro);
508
509 mg = SvSTATEhv_p (aTHX_ coro);
510 if (!mg)
511 croak ("Coro::State object required");
512
513 return (struct coro *)mg->mg_ptr;
514}
515
516#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
517
518/* faster than SvSTATE, but expects a coroutine hv */
519#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
520#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
521
522/*****************************************************************************/
523/* padlist management and caching */
524
525ECB_INLINE AV *
526coro_derive_padlist (pTHX_ CV *cv)
527{
528 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 529 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);
127 530
128 newpadlist = newAV (); 531 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 532 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 533#if PERL_VERSION_ATLEAST (5,10,0)
534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
535#else
536 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
537#endif
538 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
539 --AvFILLp (padlist);
540
541 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 542 av_store (newpadlist, 1, (SV *)newpad);
132 543
133 av = newAV (); /* will be @_ */ 544 return newpadlist;
134 av_extend (av, 0); 545}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 546
138 for (ix = fpad; ix > 0; ix--) 547ECB_INLINE void
548free_padlist (pTHX_ AV *padlist)
549{
550 /* may be during global destruction */
551 if (!IN_DESTRUCT)
139 { 552 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 553 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 554
555 while (i > 0) /* special-case index 0 */
142 { 556 {
143 char *name = SvPVX (namesv); /* XXX */ 557 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 558 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 559 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 560
147 } 561 while (j >= 0)
148 else 562 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 563
150 SV *sv; 564 AvFILLp (av) = -1;
151 if (*name == '&') 565 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 } 566 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 567
165 { 568 SvREFCNT_dec (AvARRAY (padlist)[0]);
166 npad[ix] = SvREFCNT_inc (ppad[ix]); 569
167 } 570 AvFILLp (padlist) = -1;
571 SvREFCNT_dec ((SV*)padlist);
572 }
573}
574
575static int
576coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
577{
578 AV *padlist;
579 AV *av = (AV *)mg->mg_obj;
580
581 /* perl manages to free our internal AV and _then_ call us */
582 if (IN_DESTRUCT)
583 return 0;
584
585 /* casting is fun. */
586 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
587 free_padlist (aTHX_ padlist);
588
589 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
590
591 return 0;
592}
593
594static MGVTBL coro_cv_vtbl = {
595 0, 0, 0, 0,
596 coro_cv_free
597};
598
599/* the next two functions merely cache the padlists */
600ECB_INLINE void
601get_padlist (pTHX_ CV *cv)
602{
603 MAGIC *mg = CORO_MAGIC_cv (cv);
604 AV *av;
605
606 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
607 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
168 else 608 else
169 { 609 {
170 SV *sv = NEWSV (0, 0); 610#if CORO_PREFER_PERL_FUNCTIONS
171 SvPADTMP_on (sv); 611 /* this is probably cleaner? but also slower! */
172 npad[ix] = sv; 612 /* in practise, it seems to be less stable */
173 } 613 CV *cp = Perl_cv_clone (aTHX_ cv);
174 } 614 CvPADLIST (cv) = CvPADLIST (cp);
175 615 CvPADLIST (cp) = 0;
176#if 0 /* return -ENOTUNDERSTOOD */ 616 SvREFCNT_dec (cp);
177 /* Now that vars are all in place, clone nested closures. */ 617#else
178 618 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
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 619#endif
195 620 }
196 return newpadlist;
197} 621}
198 622
199#ifdef MAY_FLUSH 623ECB_INLINE void
200STATIC void 624put_padlist (pTHX_ CV *cv)
201free_padlist (AV *padlist)
202{ 625{
203 /* may be during global destruction */ 626 MAGIC *mg = CORO_MAGIC_cv (cv);
204 if (SvREFCNT(padlist)) 627 AV *av;
628
629 if (ecb_expect_false (!mg))
630 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
631
632 av = (AV *)mg->mg_obj;
633
634 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
635 av_extend (av, AvFILLp (av) + 1);
636
637 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
638}
639
640/** load & save, init *******************************************************/
641
642/* swap sv heads, at least logically */
643static void
644swap_svs (pTHX_ Coro__State c)
645{
646 int i;
647
648 for (i = 0; i <= AvFILLp (c->swap_sv); )
205 { 649 {
206 I32 i = AvFILLp(padlist); 650 SV *a = AvARRAY (c->swap_sv)[i++];
207 while (i >= 0) 651 SV *b = AvARRAY (c->swap_sv)[i++];
652
653 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
654 SV tmp;
655
656 /* swap sv_any */
657 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
658
659 /* swap sv_flags */
660 SvFLAGS (&tmp) = SvFLAGS (a);
661 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
662 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
663
664#if PERL_VERSION_ATLEAST (5,10,0)
665 /* perl 5.10 complicates this _quite_ a bit, but it also is
666 * much faster, so no quarrels here. alternatively, we could
667 * sv_upgrade to avoid this.
668 */
208 { 669 {
209 SV **svp = av_fetch(padlist, i--, FALSE); 670 /* swap sv_u */
210 SV *sv = svp ? *svp : Nullsv; 671 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
211 if (sv) 672
212 SvREFCNT_dec(sv); 673 /* if SvANY points to the head, we need to adjust the pointers,
674 * as the pointer for a still points to b, and maybe vice versa.
675 */
676 #define svany_in_head(type) \
677 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
678
679 if (svany_in_head (SvTYPE (a)))
680 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
681
682 if (svany_in_head (SvTYPE (b)))
683 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
213 } 684 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif 685#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 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 { 686 }
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 687}
245 688
246#ifdef MAY_FLUSH 689#define SWAP_SVS(coro) \
247STATIC void 690 if (ecb_expect_false ((coro)->swap_sv)) \
248flush_padlist_cache () 691 swap_svs (aTHX_ (coro))
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252 692
253 if (hv_iterinit (hv)) 693static void
254 { 694on_enterleave_call (pTHX_ SV *cb);
255 HE *he;
256 AV *padlist;
257 695
258 while (!!(he = hv_iternext (hv))) 696static void
259 { 697load_perl (pTHX_ Coro__State c)
260 AV *av = (AV *)HeVAL(he); 698{
699 perl_slots *slot = c->slot;
700 c->slot = 0;
261 701
262 /* casting is fun. */ 702 PL_mainstack = c->mainstack;
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267 703
268 SvREFCNT_dec (hv); 704#if CORO_JIT
269} 705 load_perl_slots (slot);
706#else
707 #define VARx(name,expr,type) expr = slot->name;
708 # include "state.h"
709 #undef VARx
270#endif 710#endif
271
272#define SB do {
273#define SE } while (0)
274
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
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 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
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316 711
317 { 712 {
318 dSP; 713 dSP;
714
319 CV *cv; 715 CV *cv;
320 716
321 /* now do the ugly restore mess */ 717 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 718 while (ecb_expect_true (cv = (CV *)POPs))
323 { 719 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 720 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 721 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 722 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 723 }
337 724
338 PUTBACK; 725 PUTBACK;
339 } 726 }
340}
341 727
728 slf_frame = c->slf_frame;
729 CORO_THROW = c->except;
730
731 if (ecb_expect_false (enable_times))
732 {
733 if (ecb_expect_false (!times_valid))
734 coro_times_update ();
735
736 coro_times_sub (c);
737 }
738
739 if (ecb_expect_false (c->on_enter))
740 {
741 int i;
742
743 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
744 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
745 }
746
747 SWAP_SVS (c);
748}
749
342static void 750static void
343save_state(pTHX_ Coro__State c, int flags) 751save_perl (pTHX_ Coro__State c)
344{ 752{
753 SWAP_SVS (c);
754
755 if (ecb_expect_false (c->on_leave))
756 {
757 int i;
758
759 for (i = AvFILLp (c->on_leave); i >= 0; --i)
760 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
761 }
762
763 times_valid = 0;
764
765 if (ecb_expect_false (enable_times))
766 {
767 coro_times_update (); times_valid = 1;
768 coro_times_add (c);
769 }
770
771 c->except = CORO_THROW;
772 c->slf_frame = slf_frame;
773
345 { 774 {
346 dSP; 775 dSP;
347 I32 cxix = cxstack_ix; 776 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 777 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 778 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 780 /*
352 * the worst thing you can imagine happens first - we have to save 781 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 782 * (and reinitialize) all cv's in the whole callchain :(
354 */ 783 */
355 784
356 PUSHs (Nullsv); 785 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 786 /* this loop was inspired by pp_caller */
358 for (;;) 787 for (;;)
359 { 788 {
360 while (cxix >= 0) 789 while (ecb_expect_true (cxix >= 0))
361 { 790 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 791 PERL_CONTEXT *cx = &ccstk[cxix--];
363 792
364 if (CxTYPE(cx) == CXt_SUB) 793 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 794 {
366 CV *cv = cx->blk_sub.cv; 795 CV *cv = cx->blk_sub.cv;
796
367 if (CvDEPTH(cv)) 797 if (ecb_expect_true (CvDEPTH (cv)))
368 { 798 {
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); 799 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)); 800 PUSHs ((SV *)CvPADLIST (cv));
801 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 802 PUSHs ((SV *)cv);
385 803
386 get_padlist (cv); /* this is a monster */ 804 CvDEPTH (cv) = 0;
805 get_padlist (aTHX_ cv);
387 } 806 }
388 } 807 }
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 } 808 }
396 809
397 if (top_si->si_type == PERLSI_MAIN) 810 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
398 break; 811 break;
399 812
400 top_si = top_si->si_prev; 813 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack; 814 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix; 815 cxix = top_si->si_cxix;
403 } 816 }
404 817
405 PUTBACK; 818 PUTBACK;
406 } 819 }
407 820
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 821 /* allocate some space on the context stack for our purposes */
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 822 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 823 {
824 unsigned int i;
411 825
412 c->dowarn = PL_dowarn; 826 for (i = 0; i < SLOT_COUNT; ++i)
413 c->in_eval = PL_in_eval; 827 CXINC;
414 828
415 c->curstackinfo = PL_curstackinfo; 829 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 c->curstack = PL_curstack; 830 }
831
417 c->mainstack = PL_mainstack; 832 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp; 833
419 c->op = PL_op; 834 {
420 c->curpad = PL_curpad; 835 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
421 c->stack_base = PL_stack_base; 836
422 c->stack_max = PL_stack_max; 837#if CORO_JIT
423 c->tmps_stack = PL_tmps_stack; 838 save_perl_slots (slot);
424 c->tmps_floor = PL_tmps_floor; 839#else
425 c->tmps_ix = PL_tmps_ix; 840 #define VARx(name,expr,type) slot->name = expr;
426 c->tmps_max = PL_tmps_max; 841 # include "state.h"
427 c->markstack = PL_markstack; 842 #undef VARx
428 c->markstack_ptr = PL_markstack_ptr; 843#endif
429 c->markstack_max = PL_markstack_max; 844 }
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} 845}
442 846
443/* 847/*
444 * allocate various perl stacks. This is an exact copy 848 * allocate various perl stacks. This is almost an exact copy
445 * of perl.c:init_stacks, except that it uses less memory 849 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need 850 * on the (sometimes correct) assumption that coroutines do
447 * a lot of stackspace. 851 * not usually need a lot of stackspace.
448 */ 852 */
449STATIC void 853#if CORO_PREFER_PERL_FUNCTIONS
854# define coro_init_stacks(thx) init_stacks ()
855#else
856static void
450coro_init_stacks (pTHX) 857coro_init_stacks (pTHX)
451{ 858{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 859 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; 860 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack; 861 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 862 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456 863
457 PL_stack_base = AvARRAY(PL_curstack); 864 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base; 865 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 866 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460 867
461 New(50,PL_tmps_stack,96,SV*); 868 New(50,PL_tmps_stack,32,SV*);
462 PL_tmps_floor = -1; 869 PL_tmps_floor = -1;
463 PL_tmps_ix = -1; 870 PL_tmps_ix = -1;
464 PL_tmps_max = 96; 871 PL_tmps_max = 32;
465 872
466 New(54,PL_markstack,16,I32); 873 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack; 874 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16; 875 PL_markstack_max = PL_markstack + 16;
469 876
877#ifdef SET_MARK_OFFSET
470 SET_MARK_OFFSET; 878 SET_MARK_OFFSET;
879#endif
471 880
472 New(54,PL_scopestack,16,I32); 881 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 882 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 883 PL_scopestack_max = 8;
475 884
476 New(54,PL_savestack,96,ANY); 885 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 887 PL_savestack_max = 24;
479 888
889#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 890 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 892 PL_retstack_max = 4;
893#endif
483} 894}
895#endif
484 896
485/* 897/*
486 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */ 899 */
489STATIC void 900static void
490destroy_stacks(pTHX) 901coro_destruct_stacks (pTHX)
491{ 902{
492 int destruct = PL_main_cv != Nullcv;
493
494 if (destruct)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
507 905
508 while (PL_curstackinfo) 906 while (PL_curstackinfo)
509 { 907 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 908 PERL_SI *p = PL_curstackinfo->si_prev;
511 909
512 { 910 if (!IN_DESTRUCT)
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (destruct)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 911 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 912
524 Safefree(PL_curstackinfo->si_cxstack); 913 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 914 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 915 PL_curstackinfo = p;
527 } 916 }
528 917
529 Safefree(PL_tmps_stack); 918 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 919 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 920 Safefree (PL_scopestack);
532 Safefree(PL_savestack); 921 Safefree (PL_savestack);
922#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree(PL_retstack); 923 Safefree (PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif 924#endif
925}
926
927#define CORO_RSS \
928 rss += sizeof (SYM (curstackinfo)); \
929 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
930 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
931 rss += SYM (tmps_max) * sizeof (SV *); \
932 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
933 rss += SYM (scopestack_max) * sizeof (I32); \
934 rss += SYM (savestack_max) * sizeof (ANY);
935
936static size_t
937coro_rss (pTHX_ struct coro *coro)
938{
939 size_t rss = sizeof (*coro);
940
941 if (coro->mainstack)
942 {
943 if (coro->flags & CF_RUNNING)
553 { 944 {
554 /*FIXME*//*D*//* reasonable stack size! */ 945 #define SYM(sym) PL_ ## sym
555 stack->ssize = -4096 * sizeof (long); 946 CORO_RSS;
556 New (0, stack->sptr, 4096, long); 947 #undef SYM
557 } 948 }
558 }
559 else 949 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 { 950 {
576#ifdef HAVE_MMAP 951 #define SYM(sym) coro->slot->sym
577 if (stack->ssize > 0 && stack->sptr) 952 CORO_RSS;
578 munmap (stack->sptr, stack->ssize); 953 #undef SYM
579 else 954 }
580#else 955 }
581 Safefree (stack->sptr); 956
957 return rss;
958}
959
960/** coroutine stack handling ************************************************/
961
962static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
963static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
964static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
965
966/* apparently < 5.8.8 */
967#ifndef MgPV_nolen_const
968#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
969 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
970 (const char*)(mg)->mg_ptr)
582#endif 971#endif
583 Safefree (stack); 972
973/*
974 * This overrides the default magic get method of %SIG elements.
975 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
976 * and instead of trying to save and restore the hash elements (extremely slow),
977 * we just provide our own readback here.
978 */
979static int ecb_cold
980coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
981{
982 const char *s = MgPV_nolen_const (mg);
983
984 if (*s == '_')
985 {
986 SV **svp = 0;
987
988 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
989 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
990
991 if (svp)
992 {
993 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
994 return 0;
584 } 995 }
585 else if (ctx->gencnt == stack->gencnt) 996 }
586 --stack->usecnt; 997
998 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
999}
1000
1001static int ecb_cold
1002coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1003{
1004 const char *s = MgPV_nolen_const (mg);
1005
1006 if (*s == '_')
587 } 1007 {
588} 1008 SV **svp = 0;
589 1009
1010 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1011 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1012
1013 if (svp)
1014 {
1015 SV *old = *svp;
1016 *svp = 0;
1017 SvREFCNT_dec (old);
1018 return 0;
1019 }
1020 }
1021
1022 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1023}
1024
1025static int ecb_cold
1026coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1027{
1028 const char *s = MgPV_nolen_const (mg);
1029
1030 if (*s == '_')
1031 {
1032 SV **svp = 0;
1033
1034 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1035 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1036
1037 if (svp)
1038 {
1039 SV *old = *svp;
1040 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1041 SvREFCNT_dec (old);
1042 return 0;
1043 }
1044 }
1045
1046 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1047}
1048
1049static void
1050prepare_nop (pTHX_ struct coro_transfer_args *ta)
1051{
1052 /* kind of mega-hacky, but works */
1053 ta->next = ta->prev = (struct coro *)ta;
1054}
1055
590static void 1056static int
591setup_coro (void *arg) 1057slf_check_nop (pTHX_ struct CoroSLF *frame)
1058{
1059 return 0;
1060}
1061
1062static int
1063slf_check_repeat (pTHX_ struct CoroSLF *frame)
1064{
1065 return 1;
1066}
1067
1068static UNOP init_perl_op;
1069
1070ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1071init_perl (pTHX_ struct coro *coro)
592{ 1072{
593 /* 1073 /*
594 * emulate part of the perl startup here. 1074 * emulate part of the perl startup here.
595 */ 1075 */
1076 coro_init_stacks (aTHX);
1077
1078 PL_runops = RUNOPS_DEFAULT;
1079 PL_curcop = &PL_compiling;
1080 PL_in_eval = EVAL_NULL;
1081 PL_comppad = 0;
1082 PL_comppad_name = 0;
1083 PL_comppad_name_fill = 0;
1084 PL_comppad_name_floor = 0;
1085 PL_curpm = 0;
1086 PL_curpad = 0;
1087 PL_localizing = 0;
1088 PL_restartop = 0;
1089#if PERL_VERSION_ATLEAST (5,10,0)
1090 PL_parser = 0;
1091#endif
1092 PL_hints = 0;
1093
1094 /* recreate the die/warn hooks */
1095 PL_diehook = SvREFCNT_inc (rv_diehook);
1096 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1097
1098 GvSV (PL_defgv) = newSV (0);
1099 GvAV (PL_defgv) = coro->args; coro->args = 0;
1100 GvSV (PL_errgv) = newSV (0);
1101 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1102 GvHV (PL_hintgv) = 0;
1103 PL_rs = newSVsv (GvSV (irsgv));
1104 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1105
1106 {
1107 dSP;
1108 UNOP myop;
1109
1110 Zero (&myop, 1, UNOP);
1111 myop.op_next = Nullop;
1112 myop.op_type = OP_ENTERSUB;
1113 myop.op_flags = OPf_WANT_VOID;
1114
1115 PUSHMARK (SP);
1116 PUSHs ((SV *)coro->startcv);
1117 PUTBACK;
1118 PL_op = (OP *)&myop;
1119 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1120 }
1121
1122 /* this newly created coroutine might be run on an existing cctx which most
1123 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1124 */
1125 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1126 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1127 slf_frame.destroy = 0;
1128
1129 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1130 init_perl_op.op_next = PL_op;
1131 init_perl_op.op_type = OP_ENTERSUB;
1132 init_perl_op.op_ppaddr = pp_slf;
1133 /* no flags etc. required, as an init function won't be called */
1134
1135 PL_op = (OP *)&init_perl_op;
1136
1137 /* copy throw, in case it was set before init_perl */
1138 CORO_THROW = coro->except;
1139
1140 SWAP_SVS (coro);
1141
1142 if (ecb_expect_false (enable_times))
1143 {
1144 coro_times_update ();
1145 coro_times_sub (coro);
1146 }
1147}
1148
1149static void
1150coro_unwind_stacks (pTHX)
1151{
1152 if (!IN_DESTRUCT)
1153 {
1154 /* restore all saved variables and stuff */
1155 LEAVE_SCOPE (0);
1156 assert (PL_tmps_floor == -1);
1157
1158 /* free all temporaries */
1159 FREETMPS;
1160 assert (PL_tmps_ix == -1);
1161
1162 /* unwind all extra stacks */
1163 POPSTACK_TO (PL_mainstack);
1164
1165 /* unwind main stack */
1166 dounwind (-1);
1167 }
1168}
1169
1170static void
1171destroy_perl (pTHX_ struct coro *coro)
1172{
1173 SV *svf [9];
1174
1175 {
1176 SV *old_current = SvRV (coro_current);
1177 struct coro *current = SvSTATE (old_current);
1178
1179 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1180
1181 save_perl (aTHX_ current);
1182
1183 /* this will cause transfer_check to croak on block*/
1184 SvRV_set (coro_current, (SV *)coro->hv);
1185
1186 load_perl (aTHX_ coro);
1187
1188 coro_unwind_stacks (aTHX);
1189
1190 /* restore swapped sv's */
1191 SWAP_SVS (coro);
1192
1193 coro_destruct_stacks (aTHX);
1194
1195 /* now save some sv's to be free'd later */
1196 svf [0] = GvSV (PL_defgv);
1197 svf [1] = (SV *)GvAV (PL_defgv);
1198 svf [2] = GvSV (PL_errgv);
1199 svf [3] = (SV *)PL_defoutgv;
1200 svf [4] = PL_rs;
1201 svf [5] = GvSV (irsgv);
1202 svf [6] = (SV *)GvHV (PL_hintgv);
1203 svf [7] = PL_diehook;
1204 svf [8] = PL_warnhook;
1205 assert (9 == sizeof (svf) / sizeof (*svf));
1206
1207 SvRV_set (coro_current, old_current);
1208
1209 load_perl (aTHX_ current);
1210 }
1211
1212 {
1213 unsigned int i;
1214
1215 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1216 SvREFCNT_dec (svf [i]);
1217
1218 SvREFCNT_dec (coro->saved_deffh);
1219 SvREFCNT_dec (coro->rouse_cb);
1220 SvREFCNT_dec (coro->invoke_cb);
1221 SvREFCNT_dec (coro->invoke_av);
1222 }
1223}
1224
1225ECB_INLINE void
1226free_coro_mortal (pTHX)
1227{
1228 if (ecb_expect_true (coro_mortal))
1229 {
1230 SvREFCNT_dec ((SV *)coro_mortal);
1231 coro_mortal = 0;
1232 }
1233}
1234
1235static int
1236runops_trace (pTHX)
1237{
1238 COP *oldcop = 0;
1239 int oldcxix = -2;
1240
1241 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1242 {
1243 PERL_ASYNC_CHECK ();
1244
1245 if (cctx_current->flags & CC_TRACE_ALL)
1246 {
1247 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1248 {
1249 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1250 SV **bot, **top;
1251 AV *av = newAV (); /* return values */
1252 SV **cb;
1253 dSP;
1254
1255 GV *gv = CvGV (cx->blk_sub.cv);
1256 SV *fullname = sv_2mortal (newSV (0));
1257 if (isGV (gv))
1258 gv_efullname3 (fullname, gv, 0);
1259
1260 bot = PL_stack_base + cx->blk_oldsp + 1;
1261 top = cx->blk_gimme == G_ARRAY ? SP + 1
1262 : cx->blk_gimme == G_SCALAR ? bot + 1
1263 : bot;
1264
1265 av_extend (av, top - bot);
1266 while (bot < top)
1267 av_push (av, SvREFCNT_inc_NN (*bot++));
1268
1269 PL_runops = RUNOPS_DEFAULT;
1270 ENTER;
1271 SAVETMPS;
1272 EXTEND (SP, 3);
1273 PUSHMARK (SP);
1274 PUSHs (&PL_sv_no);
1275 PUSHs (fullname);
1276 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1277 PUTBACK;
1278 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1279 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1280 SPAGAIN;
1281 FREETMPS;
1282 LEAVE;
1283 PL_runops = runops_trace;
1284 }
1285
1286 if (oldcop != PL_curcop)
1287 {
1288 oldcop = PL_curcop;
1289
1290 if (PL_curcop != &PL_compiling)
1291 {
1292 SV **cb;
1293
1294 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1295 {
1296 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1297
1298 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1299 {
1300 dSP;
1301 GV *gv = CvGV (cx->blk_sub.cv);
1302 SV *fullname = sv_2mortal (newSV (0));
1303
1304 if (isGV (gv))
1305 gv_efullname3 (fullname, gv, 0);
1306
1307 PL_runops = RUNOPS_DEFAULT;
1308 ENTER;
1309 SAVETMPS;
1310 EXTEND (SP, 3);
1311 PUSHMARK (SP);
1312 PUSHs (&PL_sv_yes);
1313 PUSHs (fullname);
1314 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1315 PUTBACK;
1316 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1317 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1318 SPAGAIN;
1319 FREETMPS;
1320 LEAVE;
1321 PL_runops = runops_trace;
1322 }
1323
1324 oldcxix = cxstack_ix;
1325 }
1326
1327 if (cctx_current->flags & CC_TRACE_LINE)
1328 {
1329 dSP;
1330
1331 PL_runops = RUNOPS_DEFAULT;
1332 ENTER;
1333 SAVETMPS;
1334 EXTEND (SP, 3);
1335 PL_runops = RUNOPS_DEFAULT;
1336 PUSHMARK (SP);
1337 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1338 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1339 PUTBACK;
1340 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1341 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1342 SPAGAIN;
1343 FREETMPS;
1344 LEAVE;
1345 PL_runops = runops_trace;
1346 }
1347 }
1348 }
1349 }
1350 }
1351
1352 TAINT_NOT;
1353 return 0;
1354}
1355
1356static struct CoroSLF cctx_ssl_frame;
1357
1358static void
1359slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1360{
1361 ta->prev = 0;
1362}
1363
1364static int
1365slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1366{
1367 *frame = cctx_ssl_frame;
1368
1369 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1370}
1371
1372/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1373static void ecb_noinline
1374cctx_prepare (pTHX)
1375{
1376 PL_top_env = &PL_start_env;
1377
1378 if (cctx_current->flags & CC_TRACE)
1379 PL_runops = runops_trace;
1380
1381 /* we already must be executing an SLF op, there is no other valid way
1382 * that can lead to creation of a new cctx */
1383 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1384 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1385
1386 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1387 cctx_ssl_frame = slf_frame;
1388
1389 slf_frame.prepare = slf_prepare_set_stacklevel;
1390 slf_frame.check = slf_check_set_stacklevel;
1391}
1392
1393/* the tail of transfer: execute stuff we can only do after a transfer */
1394ECB_INLINE void
1395transfer_tail (pTHX)
1396{
1397 free_coro_mortal (aTHX);
1398}
1399
1400/*
1401 * this is a _very_ stripped down perl interpreter ;)
1402 */
1403static void
1404cctx_run (void *arg)
1405{
1406#ifdef USE_ITHREADS
1407# if CORO_PTHREAD
1408 PERL_SET_CONTEXT (coro_thx);
1409# endif
1410#endif
1411 {
1412 dTHX;
1413
1414 /* normally we would need to skip the entersub here */
1415 /* not doing so will re-execute it, which is exactly what we want */
1416 /* PL_nop = PL_nop->op_next */
1417
1418 /* inject a fake subroutine call to cctx_init */
1419 cctx_prepare (aTHX);
1420
1421 /* cctx_run is the alternative tail of transfer() */
1422 transfer_tail (aTHX);
1423
1424 /* somebody or something will hit me for both perl_run and PL_restartop */
1425 PL_restartop = PL_op;
1426 perl_run (PL_curinterp);
1427 /*
1428 * Unfortunately, there is no way to get at the return values of the
1429 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1430 * runtime errors here, as this is just a random interpreter, not a thread.
1431 */
1432
1433 /*
1434 * If perl-run returns we assume exit() was being called or the coro
1435 * fell off the end, which seems to be the only valid (non-bug)
1436 * reason for perl_run to return. We try to exit by jumping to the
1437 * bootstrap-time "top" top_env, as we cannot restore the "main"
1438 * coroutine as Coro has no such concept.
1439 * This actually isn't valid with the pthread backend, but OSes requiring
1440 * that backend are too broken to do it in a standards-compliant way.
1441 */
1442 PL_top_env = main_top_env;
1443 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1444 }
1445}
1446
1447static coro_cctx *
1448cctx_new (void)
1449{
1450 coro_cctx *cctx;
1451
1452 ++cctx_count;
1453 New (0, cctx, 1, coro_cctx);
1454
1455 cctx->gen = cctx_gen;
1456 cctx->flags = 0;
1457 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1458
1459 return cctx;
1460}
1461
1462/* create a new cctx only suitable as source */
1463static coro_cctx *
1464cctx_new_empty (void)
1465{
1466 coro_cctx *cctx = cctx_new ();
1467
1468 cctx->sptr = 0;
1469 coro_create (&cctx->cctx, 0, 0, 0, 0);
1470
1471 return cctx;
1472}
1473
1474/* create a new cctx suitable as destination/running a perl interpreter */
1475static coro_cctx *
1476cctx_new_run (void)
1477{
1478 coro_cctx *cctx = cctx_new ();
1479 void *stack_start;
1480 size_t stack_size;
1481
1482#if HAVE_MMAP
1483 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1484 /* mmap supposedly does allocate-on-write for us */
1485 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
1486
1487 if (cctx->sptr != (void *)-1)
1488 {
1489 #if CORO_STACKGUARD
1490 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1491 #endif
1492 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1493 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1494 cctx->flags |= CC_MAPPED;
1495 }
1496 else
1497#endif
1498 {
1499 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1500 New (0, cctx->sptr, cctx_stacksize, long);
1501
1502 if (!cctx->sptr)
1503 {
1504 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1505 _exit (EXIT_FAILURE);
1506 }
1507
1508 stack_start = cctx->sptr;
1509 stack_size = cctx->ssize;
1510 }
1511
1512 #if CORO_USE_VALGRIND
1513 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1514 #endif
1515
1516 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1517
1518 return cctx;
1519}
1520
1521static void
1522cctx_destroy (coro_cctx *cctx)
1523{
1524 if (!cctx)
1525 return;
1526
1527 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1528
1529 --cctx_count;
1530 coro_destroy (&cctx->cctx);
1531
1532 /* coro_transfer creates new, empty cctx's */
1533 if (cctx->sptr)
1534 {
1535 #if CORO_USE_VALGRIND
1536 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1537 #endif
1538
1539#if HAVE_MMAP
1540 if (cctx->flags & CC_MAPPED)
1541 munmap (cctx->sptr, cctx->ssize);
1542 else
1543#endif
1544 Safefree (cctx->sptr);
1545 }
1546
1547 Safefree (cctx);
1548}
1549
1550/* wether this cctx should be destructed */
1551#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1552
1553static coro_cctx *
1554cctx_get (pTHX)
1555{
1556 while (ecb_expect_true (cctx_first))
1557 {
1558 coro_cctx *cctx = cctx_first;
1559 cctx_first = cctx->next;
1560 --cctx_idle;
1561
1562 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1563 return cctx;
1564
1565 cctx_destroy (cctx);
1566 }
1567
1568 return cctx_new_run ();
1569}
1570
1571static void
1572cctx_put (coro_cctx *cctx)
1573{
1574 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1575
1576 /* free another cctx if overlimit */
1577 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1578 {
1579 coro_cctx *first = cctx_first;
1580 cctx_first = first->next;
1581 --cctx_idle;
1582
1583 cctx_destroy (first);
1584 }
1585
1586 ++cctx_idle;
1587 cctx->next = cctx_first;
1588 cctx_first = cctx;
1589}
1590
1591/** coroutine switching *****************************************************/
1592
1593static void
1594transfer_check (pTHX_ struct coro *prev, struct coro *next)
1595{
1596 /* TODO: throwing up here is considered harmful */
1597
1598 if (ecb_expect_true (prev != next))
1599 {
1600 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1601 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1602
1603 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1604 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1605
1606#if !PERL_VERSION_ATLEAST (5,10,0)
1607 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1608 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1609#endif
1610 }
1611}
1612
1613/* always use the TRANSFER macro */
1614static void ecb_noinline /* noinline so we have a fixed stackframe */
1615transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1616{
1617 dSTACKLEVEL;
1618
1619 /* sometimes transfer is only called to set idle_sp */
1620 if (ecb_expect_false (!prev))
1621 {
1622 cctx_current->idle_sp = STACKLEVEL;
1623 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1624 }
1625 else if (ecb_expect_true (prev != next))
1626 {
1627 coro_cctx *cctx_prev;
1628
1629 if (ecb_expect_false (prev->flags & CF_NEW))
1630 {
1631 /* create a new empty/source context */
1632 prev->flags &= ~CF_NEW;
1633 prev->flags |= CF_RUNNING;
1634 }
1635
1636 prev->flags &= ~CF_RUNNING;
1637 next->flags |= CF_RUNNING;
1638
1639 /* first get rid of the old state */
1640 save_perl (aTHX_ prev);
1641
1642 if (ecb_expect_false (next->flags & CF_NEW))
1643 {
1644 /* need to start coroutine */
1645 next->flags &= ~CF_NEW;
1646 /* setup coroutine call */
1647 init_perl (aTHX_ next);
1648 }
1649 else
1650 load_perl (aTHX_ next);
1651
1652 /* possibly untie and reuse the cctx */
1653 if (ecb_expect_true (
1654 cctx_current->idle_sp == STACKLEVEL
1655 && !(cctx_current->flags & CC_TRACE)
1656 && !force_cctx
1657 ))
1658 {
1659 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1660 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1661
1662 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1663 /* without this the next cctx_get might destroy the running cctx while still in use */
1664 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1665 if (ecb_expect_true (!next->cctx))
1666 next->cctx = cctx_get (aTHX);
1667
1668 cctx_put (cctx_current);
1669 }
1670 else
1671 prev->cctx = cctx_current;
1672
1673 ++next->usecount;
1674
1675 cctx_prev = cctx_current;
1676 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1677
1678 next->cctx = 0;
1679
1680 if (ecb_expect_false (cctx_prev != cctx_current))
1681 {
1682 cctx_prev->top_env = PL_top_env;
1683 PL_top_env = cctx_current->top_env;
1684 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1685 }
1686
1687 transfer_tail (aTHX);
1688 }
1689}
1690
1691#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1692#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1693
1694/** high level stuff ********************************************************/
1695
1696/* this function is actually Coro, not Coro::State, but we call it from here */
1697/* because it is convenient - but it hasn't been declared yet for that reason */
1698static void
1699coro_call_on_destroy (pTHX_ struct coro *coro);
1700
1701static void
1702coro_state_destroy (pTHX_ struct coro *coro)
1703{
1704 if (coro->flags & CF_ZOMBIE)
1705 return;
1706
1707 slf_destroy (aTHX_ coro);
1708
1709 coro->flags |= CF_ZOMBIE;
1710
1711 if (coro->flags & CF_READY)
1712 {
1713 /* reduce nready, as destroying a ready coro effectively unreadies it */
1714 /* alternative: look through all ready queues and remove the coro */
1715 --coro_nready;
1716 }
1717 else
1718 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1719
1720 if (coro->next) coro->next->prev = coro->prev;
1721 if (coro->prev) coro->prev->next = coro->next;
1722 if (coro == coro_first) coro_first = coro->next;
1723
1724 if (coro->mainstack
1725 && coro->mainstack != main_mainstack
1726 && coro->slot
1727 && !PL_dirty)
1728 destroy_perl (aTHX_ coro);
1729
1730 cctx_destroy (coro->cctx);
1731 SvREFCNT_dec (coro->startcv);
1732 SvREFCNT_dec (coro->args);
1733 SvREFCNT_dec (coro->swap_sv);
1734 SvREFCNT_dec (CORO_THROW);
1735
1736 coro_call_on_destroy (aTHX_ coro);
1737
1738 /* more destruction mayhem in coro_state_free */
1739}
1740
1741static int
1742coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1743{
1744 struct coro *coro = (struct coro *)mg->mg_ptr;
1745 mg->mg_ptr = 0;
1746
1747 coro_state_destroy (aTHX_ coro);
1748 SvREFCNT_dec (coro->on_destroy);
1749 SvREFCNT_dec (coro->status);
1750
1751 Safefree (coro);
1752
1753 return 0;
1754}
1755
1756static int ecb_cold
1757coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1758{
1759 /* called when perl clones the current process the slow way (windows process emulation) */
1760 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1761 mg->mg_ptr = 0;
1762 mg->mg_virtual = 0;
1763
1764 return 0;
1765}
1766
1767static MGVTBL coro_state_vtbl = {
1768 0, 0, 0, 0,
1769 coro_state_free,
1770 0,
1771#ifdef MGf_DUP
1772 coro_state_dup,
1773#else
1774# define MGf_DUP 0
1775#endif
1776};
1777
1778static void
1779prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1780{
1781 ta->prev = SvSTATE (prev_sv);
1782 ta->next = SvSTATE (next_sv);
1783 TRANSFER_CHECK (*ta);
1784}
1785
1786static void
1787api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1788{
1789 struct coro_transfer_args ta;
1790
1791 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1792 TRANSFER (ta, 1);
1793}
1794
1795/** Coro ********************************************************************/
1796
1797ECB_INLINE void
1798coro_enq (pTHX_ struct coro *coro)
1799{
1800 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1801
1802 SvREFCNT_inc_NN (coro->hv);
1803
1804 coro->next_ready = 0;
1805 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1806 ready [1] = coro;
1807}
1808
1809ECB_INLINE struct coro *
1810coro_deq (pTHX)
1811{
1812 int prio;
1813
1814 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1815 {
1816 struct coro **ready = coro_ready [prio];
1817
1818 if (ready [0])
1819 {
1820 struct coro *coro = ready [0];
1821 ready [0] = coro->next_ready;
1822 return coro;
1823 }
1824 }
1825
1826 return 0;
1827}
1828
1829static void
1830invoke_sv_ready_hook_helper (void)
1831{
1832 dTHX;
596 dSP; 1833 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 1834
600 coro_init_stacks (aTHX); 1835 ENTER;
601 /*PL_curcop = 0;*/ 1836 SAVETMPS;
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 1837
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP); 1838 PUSHMARK (SP);
613 PUTBACK; 1839 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1840 call_sv (coro_readyhook, G_VOID | G_DISCARD);
615 1841
616 if (SvTRUE (ERRSV)) 1842 FREETMPS;
617 croak (NULL); 1843 LEAVE;
618 else 1844}
619 croak ("FATAL: CCTXT coroutine returned!"); 1845
1846static int
1847api_ready (pTHX_ SV *coro_sv)
1848{
1849 struct coro *coro = SvSTATE (coro_sv);
1850
1851 if (coro->flags & CF_READY)
1852 return 0;
1853
1854 coro->flags |= CF_READY;
1855
1856 coro_enq (aTHX_ coro);
1857
1858 if (!coro_nready++)
1859 if (coroapi.readyhook)
1860 coroapi.readyhook ();
1861
1862 return 1;
1863}
1864
1865static int
1866api_is_ready (pTHX_ SV *coro_sv)
1867{
1868 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1869}
1870
1871/* expects to own a reference to next->hv */
1872ECB_INLINE void
1873prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1874{
1875 SV *prev_sv = SvRV (coro_current);
1876
1877 ta->prev = SvSTATE_hv (prev_sv);
1878 ta->next = next;
1879
1880 TRANSFER_CHECK (*ta);
1881
1882 SvRV_set (coro_current, (SV *)next->hv);
1883
1884 free_coro_mortal (aTHX);
1885 coro_mortal = prev_sv;
1886}
1887
1888static void
1889prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1890{
1891 for (;;)
620 } 1892 {
621 else 1893 struct coro *next = coro_deq (aTHX);
622 {
623 UNOP myop;
624 1894
625 PL_op = (OP *)&myop; 1895 if (ecb_expect_true (next))
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 { 1896 {
682 SAVE (prev, flags); 1897 /* cannot transfer to destroyed coros, skip and look for next */
683 LOAD (next); 1898 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
684 1899 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
685 /* mark this state as in-use */ 1900 else
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 1901 {
692 if (!prev->stack) 1902 next->flags &= ~CF_READY;
693 allocate_stack (prev, 0); 1903 --coro_nready;
694 else if (prev->cursp != stacklevel 1904
695 && prev->stack->usecnt > 1) 1905 prepare_schedule_to (aTHX_ ta, next);
696 { 1906 break;
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 } 1907 }
714
715 } 1908 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else 1909 else
719 { 1910 {
720 SAVE (prev, -1); /* first get rid of the old state */ 1911 /* nothing to schedule: call the idle handler */
721 1912 if (SvROK (sv_idle)
722 if (flags & TRANSFER_SAVE_CCTXT) 1913 && SvOBJECT (SvRV (sv_idle)))
723 { 1914 {
724 if (!prev->stack) 1915 if (SvRV (sv_idle) == SvRV (coro_current))
725 allocate_stack (prev, 0); 1916 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
726 1917
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1918 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
728 { 1919 api_ready (aTHX_ SvRV (sv_idle));
729 setup_coro (next); 1920 --coro_nready;
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 } 1921 }
746 else 1922 else
747 setup_coro (next); 1923 {
1924 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1925 dSP;
1926
1927 ENTER;
1928 SAVETMPS;
1929
1930 PUSHMARK (SP);
1931 PUTBACK;
1932 call_sv (sv_idle, G_VOID | G_DISCARD);
1933
1934 FREETMPS;
1935 LEAVE;
1936 }
748 } 1937 }
749 } 1938 }
750
751 /*
752 * xnext is now either prev or next, depending on wether
753 * we switched the c stack or not. that's why i use a global
754 * variable, that should become thread-specific at one point.
755 */
756 xnext->cursp = stacklevel;
757} 1939}
758 1940
759static struct coro * 1941ECB_INLINE void
760sv_to_coro (SV *arg, const char *funcname, const char *varname) 1942prepare_cede (pTHX_ struct coro_transfer_args *ta)
761{ 1943{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1944 api_ready (aTHX_ coro_current);
763 { 1945 prepare_schedule (aTHX_ ta);
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1946}
765 1947
766 if (!he) 1948ECB_INLINE void
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1949prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1950{
1951 SV *prev = SvRV (coro_current);
768 1952
769 arg = HeVAL(he); 1953 if (coro_nready)
770 } 1954 {
1955 prepare_schedule (aTHX_ ta);
1956 api_ready (aTHX_ prev);
771 1957 }
772 /* must also be changed inside Coro::Cont::yield */ 1958 else
773 if (SvROK(arg) && SvOBJECT(SvRV(arg)) 1959 prepare_nop (aTHX_ ta);
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779} 1960}
780 1961
1962static void
1963api_schedule (pTHX)
1964{
1965 struct coro_transfer_args ta;
1966
1967 prepare_schedule (aTHX_ &ta);
1968 TRANSFER (ta, 1);
1969}
1970
1971static void
1972api_schedule_to (pTHX_ SV *coro_sv)
1973{
1974 struct coro_transfer_args ta;
1975 struct coro *next = SvSTATE (coro_sv);
1976
1977 SvREFCNT_inc_NN (coro_sv);
1978 prepare_schedule_to (aTHX_ &ta, next);
1979}
1980
781static void 1981static int
782api_transfer(pTHX_ SV *prev, SV *next, int flags) 1982api_cede (pTHX)
783{ 1983{
784 transfer(aTHX_ 1984 struct coro_transfer_args ta;
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789 1985
790/** Coro ********************************************************************/ 1986 prepare_cede (aTHX_ &ta);
791 1987
792#define PRIO_MAX 3 1988 if (ecb_expect_true (ta.prev != ta.next))
793#define PRIO_HIGH 1 1989 {
794#define PRIO_NORMAL 0 1990 TRANSFER (ta, 1);
795#define PRIO_LOW -1 1991 return 1;
796#define PRIO_IDLE -3
797#define PRIO_MIN -4
798
799/* for Coro.pm */
800static GV *coro_current, *coro_idle;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802static int coro_nready;
803
804static void
805coro_enq (SV *sv)
806{
807 if (SvROK (sv))
808 { 1992 }
809 SV *hv = SvRV (sv); 1993 else
810 if (SvTYPE (hv) == SVt_PVHV) 1994 return 0;
1995}
1996
1997static int
1998api_cede_notself (pTHX)
1999{
2000 if (coro_nready)
2001 {
2002 struct coro_transfer_args ta;
2003
2004 prepare_cede_notself (aTHX_ &ta);
2005 TRANSFER (ta, 1);
2006 return 1;
2007 }
2008 else
2009 return 0;
2010}
2011
2012static void
2013api_trace (pTHX_ SV *coro_sv, int flags)
2014{
2015 struct coro *coro = SvSTATE (coro_sv);
2016
2017 if (coro->flags & CF_RUNNING)
2018 croak ("cannot enable tracing on a running coroutine, caught");
2019
2020 if (flags & CC_TRACE)
2021 {
2022 if (!coro->cctx)
2023 coro->cctx = cctx_new_run ();
2024 else if (!(coro->cctx->flags & CC_TRACE))
2025 croak ("cannot enable tracing on coroutine with custom stack, caught");
2026
2027 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2028 }
2029 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2030 {
2031 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2032
2033 if (coro->flags & CF_RUNNING)
2034 PL_runops = RUNOPS_DEFAULT;
2035 else
2036 coro->slot->runops = RUNOPS_DEFAULT;
2037 }
2038}
2039
2040static void
2041coro_push_av (pTHX_ AV *av, I32 gimme_v)
2042{
2043 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2044 {
2045 dSP;
2046
2047 if (gimme_v == G_SCALAR)
2048 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2049 else
811 { 2050 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2051 int i;
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2052 EXTEND (SP, AvFILLp (av) + 1);
814 2053
815 prio = prio > PRIO_MAX ? PRIO_MAX 2054 for (i = 0; i <= AvFILLp (av); ++i)
816 : prio < PRIO_MIN ? PRIO_MIN 2055 PUSHs (AvARRAY (av)[i]);
817 : prio; 2056 }
818 2057
819 av_push (coro_ready [prio - PRIO_MIN], sv); 2058 PUTBACK;
820 coro_nready++; 2059 }
2060}
821 2061
2062static void
2063coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2064{
2065 if (!coro->on_destroy)
2066 coro->on_destroy = newAV ();
2067
2068 av_push (coro->on_destroy, cb);
2069}
2070
2071static void
2072slf_destroy_join (pTHX_ struct CoroSLF *frame)
2073{
2074 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2075}
2076
2077static int
2078slf_check_join (pTHX_ struct CoroSLF *frame)
2079{
2080 struct coro *coro = (struct coro *)frame->data;
2081
2082 if (!coro->status)
2083 return 1;
2084
2085 frame->destroy = 0;
2086
2087 coro_push_av (aTHX_ coro->status, GIMME_V);
2088
2089 SvREFCNT_dec ((SV *)coro->hv);
2090
2091 return 0;
2092}
2093
2094static void
2095slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2098
2099 if (items > 1)
2100 croak ("join called with too many arguments");
2101
2102 if (coro->status)
2103 frame->prepare = prepare_nop;
2104 else
2105 {
2106 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2107 frame->prepare = prepare_schedule;
2108 }
2109
2110 frame->check = slf_check_join;
2111 frame->destroy = slf_destroy_join;
2112 frame->data = (void *)coro;
2113 SvREFCNT_inc (coro->hv);
2114}
2115
2116static void
2117coro_call_on_destroy (pTHX_ struct coro *coro)
2118{
2119 AV *od = coro->on_destroy;
2120
2121 if (!od)
2122 return;
2123
2124 while (AvFILLp (od) >= 0)
2125 {
2126 SV *cb = sv_2mortal (av_pop (od));
2127
2128 /* coro hv's (and only hv's at the moment) are supported as well */
2129 if (SvSTATEhv_p (aTHX_ cb))
2130 api_ready (aTHX_ cb);
2131 else
2132 {
2133 dSP; /* don't disturb outer sp */
2134 PUSHMARK (SP);
2135
2136 if (coro->status)
2137 {
2138 PUTBACK;
2139 coro_push_av (aTHX_ coro->status, G_ARRAY);
2140 SPAGAIN;
2141 }
2142
2143 PUTBACK;
2144 call_sv (cb, G_VOID | G_DISCARD);
2145 }
2146 }
2147}
2148
2149static void
2150coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2151{
2152 AV *av;
2153
2154 if (coro->status)
2155 {
2156 av = coro->status;
2157 av_clear (av);
2158 }
2159 else
2160 av = coro->status = newAV ();
2161
2162 /* items are actually not so common, so optimise for this case */
2163 if (items)
2164 {
2165 int i;
2166
2167 av_extend (av, items - 1);
2168
2169 for (i = 0; i < items; ++i)
2170 av_push (av, SvREFCNT_inc_NN (arg [i]));
2171 }
2172}
2173
2174static void
2175slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2176{
2177 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2178 api_ready (aTHX_ sv_manager);
2179
2180 frame->prepare = prepare_schedule;
2181 frame->check = slf_check_repeat;
2182
2183 /* as a minor optimisation, we could unwind all stacks here */
2184 /* but that puts extra pressure on pp_slf, and is not worth much */
2185 /*coro_unwind_stacks (aTHX);*/
2186}
2187
2188static void
2189slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 HV *coro_hv = (HV *)SvRV (coro_current);
2192
2193 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2194 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2195}
2196
2197static void
2198slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2199{
2200 HV *coro_hv;
2201 struct coro *coro;
2202
2203 if (items <= 0)
2204 croak ("Coro::cancel called without coro object,");
2205
2206 coro = SvSTATE (arg [0]);
2207 coro_hv = coro->hv;
2208
2209 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2210
2211 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2212 {
2213 /* coro currently busy cancelling something, so just notify it */
2214 coro->slf_frame.data = (void *)coro;
2215
2216 frame->prepare = prepare_nop;
2217 frame->check = slf_check_nop;
2218 }
2219 else if (coro_hv == (HV *)SvRV (coro_current))
2220 {
2221 /* cancelling the current coro is allowed, and equals terminate */
2222 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2223 }
2224 else
2225 {
2226 struct coro *self = SvSTATE_current;
2227
2228 /* otherwise we cancel directly, purely for speed reasons
2229 * unfortunately, this requires some magic trickery, as
2230 * somebody else could cancel us, so we have to fight the cancellation.
2231 * this is ugly, and hopefully fully worth the extra speed.
2232 * besides, I can't get the slow-but-safe version working...
2233 */
2234 slf_frame.data = 0;
2235 self->flags |= CF_NOCANCEL;
2236 coro_state_destroy (aTHX_ coro);
2237 self->flags &= ~CF_NOCANCEL;
2238
2239 if (slf_frame.data)
2240 {
2241 /* while we were busy we have been cancelled, so terminate */
2242 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2243 }
2244 else
2245 {
2246 frame->prepare = prepare_nop;
2247 frame->check = slf_check_nop;
2248 }
2249 }
2250}
2251
2252static int
2253slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2254{
2255 frame->prepare = 0;
2256 coro_unwind_stacks (aTHX);
2257
2258 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2259
2260 return 1;
2261}
2262
2263static int
2264safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2265{
2266 if (coro->cctx)
2267 croak ("coro inside C callback, unable to cancel at this time, caught");
2268
2269 if (coro->flags & CF_NEW)
2270 {
2271 coro_set_status (aTHX_ coro, arg, items);
2272 coro_state_destroy (aTHX_ coro);
2273 }
2274 else
2275 {
2276 if (!coro->slf_frame.prepare)
2277 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2278
2279 slf_destroy (aTHX_ coro);
2280
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro->slf_frame.prepare = prepare_nop;
2283 coro->slf_frame.check = slf_check_safe_cancel;
2284
2285 api_ready (aTHX_ (SV *)coro->hv);
2286 }
2287
2288 return 1;
2289}
2290
2291/*****************************************************************************/
2292/* async pool handler */
2293
2294static int
2295slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2296{
2297 HV *hv = (HV *)SvRV (coro_current);
2298 struct coro *coro = (struct coro *)frame->data;
2299
2300 if (!coro->invoke_cb)
2301 return 1; /* loop till we have invoke */
2302 else
2303 {
2304 hv_store (hv, "desc", sizeof ("desc") - 1,
2305 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2306
2307 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2308
2309 {
2310 dSP;
2311 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2312 PUTBACK;
2313 }
2314
2315 SvREFCNT_dec (GvAV (PL_defgv));
2316 GvAV (PL_defgv) = coro->invoke_av;
2317 coro->invoke_av = 0;
2318
2319 return 0;
2320 }
2321}
2322
2323static void
2324slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = SvSTATE_hv ((SV *)hv);
2328
2329 if (ecb_expect_true (coro->saved_deffh))
2330 {
2331 /* subsequent iteration */
2332 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2333 coro->saved_deffh = 0;
2334
2335 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2336 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2337 {
2338 slf_init_terminate_cancel_common (aTHX_ frame, hv);
822 return; 2339 return;
823 } 2340 }
2341 else
2342 {
2343 av_clear (GvAV (PL_defgv));
2344 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2345
2346 coro->prio = 0;
2347
2348 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2349 api_trace (aTHX_ coro_current, 0);
2350
2351 frame->prepare = prepare_schedule;
2352 av_push (av_async_pool, SvREFCNT_inc (hv));
2353 }
2354 }
2355 else
824 } 2356 {
2357 /* first iteration, simply fall through */
2358 frame->prepare = prepare_nop;
2359 }
825 2360
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2361 frame->check = slf_check_pool_handler;
2362 frame->data = (void *)coro;
2363}
2364
2365/*****************************************************************************/
2366/* rouse callback */
2367
2368#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2369
2370static void
2371coro_rouse_callback (pTHX_ CV *cv)
2372{
2373 dXSARGS;
2374 SV *data = (SV *)S_GENSUB_ARG;
2375
2376 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2377 {
2378 /* first call, set args */
2379 SV *coro = SvRV (data);
2380 AV *av = newAV ();
2381
2382 SvRV_set (data, (SV *)av);
2383
2384 /* better take a full copy of the arguments */
2385 while (items--)
2386 av_store (av, items, newSVsv (ST (items)));
2387
2388 api_ready (aTHX_ coro);
2389 SvREFCNT_dec (coro);
2390 }
2391
2392 XSRETURN_EMPTY;
2393}
2394
2395static int
2396slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2397{
2398 SV *data = (SV *)frame->data;
2399
2400 if (CORO_THROW)
2401 return 0;
2402
2403 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2404 return 1;
2405
2406 /* now push all results on the stack */
2407 {
2408 dSP;
2409 AV *av = (AV *)SvRV (data);
2410 int i;
2411
2412 EXTEND (SP, AvFILLp (av) + 1);
2413 for (i = 0; i <= AvFILLp (av); ++i)
2414 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2415
2416 /* we have stolen the elements, so set length to zero and free */
2417 AvFILLp (av) = -1;
2418 av_undef (av);
2419
2420 PUTBACK;
2421 }
2422
2423 return 0;
2424}
2425
2426static void
2427slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2428{
2429 SV *cb;
2430
2431 if (items)
2432 cb = arg [0];
2433 else
2434 {
2435 struct coro *coro = SvSTATE_current;
2436
2437 if (!coro->rouse_cb)
2438 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2439
2440 cb = sv_2mortal (coro->rouse_cb);
2441 coro->rouse_cb = 0;
2442 }
2443
2444 if (!SvROK (cb)
2445 || SvTYPE (SvRV (cb)) != SVt_PVCV
2446 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2447 croak ("Coro::rouse_wait called with illegal callback argument,");
2448
2449 {
2450 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2451 SV *data = (SV *)S_GENSUB_ARG;
2452
2453 frame->data = (void *)data;
2454 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2455 frame->check = slf_check_rouse_wait;
2456 }
827} 2457}
828 2458
829static SV * 2459static SV *
830coro_deq (int min_prio) 2460coro_new_rouse_cb (pTHX)
831{ 2461{
832 int prio = PRIO_MAX - PRIO_MIN; 2462 HV *hv = (HV *)SvRV (coro_current);
2463 struct coro *coro = SvSTATE_hv (hv);
2464 SV *data = newRV_inc ((SV *)hv);
2465 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
833 2466
834 min_prio -= PRIO_MIN; 2467 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
835 if (min_prio < 0) 2468 SvREFCNT_dec (data); /* magicext increases the refcount */
836 min_prio = 0;
837 2469
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2470 SvREFCNT_dec (coro->rouse_cb);
839 if (av_len (coro_ready[prio]) >= 0) 2471 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2472
2473 return cb;
2474}
2475
2476/*****************************************************************************/
2477/* schedule-like-function opcode (SLF) */
2478
2479static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2480static const CV *slf_cv;
2481static SV **slf_argv;
2482static int slf_argc, slf_arga; /* count, allocated */
2483static I32 slf_ax; /* top of stack, for restore */
2484
2485/* this restores the stack in the case we patched the entersub, to */
2486/* recreate the stack frame as perl will on following calls */
2487/* since entersub cleared the stack */
2488static OP *
2489pp_restore (pTHX)
2490{
2491 int i;
2492 SV **SP = PL_stack_base + slf_ax;
2493
2494 PUSHMARK (SP);
2495
2496 EXTEND (SP, slf_argc + 1);
2497
2498 for (i = 0; i < slf_argc; ++i)
2499 PUSHs (sv_2mortal (slf_argv [i]));
2500
2501 PUSHs ((SV *)CvGV (slf_cv));
2502
2503 RETURNOP (slf_restore.op_first);
2504}
2505
2506static void
2507slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2508{
2509 SV **arg = (SV **)slf_frame.data;
2510
2511 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2512}
2513
2514static void
2515slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2516{
2517 if (items != 2)
2518 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2519
2520 frame->prepare = slf_prepare_transfer;
2521 frame->check = slf_check_nop;
2522 frame->data = (void *)arg; /* let's hope it will stay valid */
2523}
2524
2525static void
2526slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2527{
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_nop;
2530}
2531
2532static void
2533slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2534{
2535 struct coro *next = (struct coro *)slf_frame.data;
2536
2537 SvREFCNT_inc_NN (next->hv);
2538 prepare_schedule_to (aTHX_ ta, next);
2539}
2540
2541static void
2542slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2543{
2544 if (!items)
2545 croak ("Coro::schedule_to expects a coroutine argument, caught");
2546
2547 frame->data = (void *)SvSTATE (arg [0]);
2548 frame->prepare = slf_prepare_schedule_to;
2549 frame->check = slf_check_nop;
2550}
2551
2552static void
2553slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2554{
2555 api_ready (aTHX_ SvRV (coro_current));
2556
2557 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2558}
2559
2560static void
2561slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 frame->prepare = prepare_cede;
2564 frame->check = slf_check_nop;
2565}
2566
2567static void
2568slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2569{
2570 frame->prepare = prepare_cede_notself;
2571 frame->check = slf_check_nop;
2572}
2573
2574/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2575static void
2576slf_destroy (pTHX_ struct coro *coro)
2577{
2578 /* this callback is reserved for slf functions needing to do cleanup */
2579 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2580 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2581
2582 /*
2583 * The on_destroy above most likely is from an SLF call.
2584 * Since by definition the SLF call will not finish when we destroy
2585 * the coro, we will have to force-finish it here, otherwise
2586 * cleanup functions cannot call SLF functions.
2587 */
2588 coro->slf_frame.prepare = 0;
2589}
2590
2591/*
2592 * these not obviously related functions are all rolled into one
2593 * function to increase chances that they all will call transfer with the same
2594 * stack offset
2595 * SLF stands for "schedule-like-function".
2596 */
2597static OP *
2598pp_slf (pTHX)
2599{
2600 I32 checkmark; /* mark SP to see how many elements check has pushed */
2601
2602 /* set up the slf frame, unless it has already been set-up */
2603 /* the latter happens when a new coro has been started */
2604 /* or when a new cctx was attached to an existing coroutine */
2605 if (ecb_expect_true (!slf_frame.prepare))
2606 {
2607 /* first iteration */
2608 dSP;
2609 SV **arg = PL_stack_base + TOPMARK + 1;
2610 int items = SP - arg; /* args without function object */
2611 SV *gv = *sp;
2612
2613 /* do a quick consistency check on the "function" object, and if it isn't */
2614 /* for us, divert to the real entersub */
2615 if (SvTYPE (gv) != SVt_PVGV
2616 || !GvCV (gv)
2617 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2618 return PL_ppaddr[OP_ENTERSUB](aTHX);
2619
2620 if (!(PL_op->op_flags & OPf_STACKED))
840 { 2621 {
841 coro_nready--; 2622 /* ampersand-form of call, use @_ instead of stack */
842 return av_shift (coro_ready[prio]); 2623 AV *av = GvAV (PL_defgv);
2624 arg = AvARRAY (av);
2625 items = AvFILLp (av) + 1;
843 } 2626 }
2627
2628 /* now call the init function, which needs to set up slf_frame */
2629 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2630 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2631
2632 /* pop args */
2633 SP = PL_stack_base + POPMARK;
2634
2635 PUTBACK;
2636 }
2637
2638 /* now that we have a slf_frame, interpret it! */
2639 /* we use a callback system not to make the code needlessly */
2640 /* complicated, but so we can run multiple perl coros from one cctx */
2641
2642 do
2643 {
2644 struct coro_transfer_args ta;
2645
2646 slf_frame.prepare (aTHX_ &ta);
2647 TRANSFER (ta, 0);
2648
2649 checkmark = PL_stack_sp - PL_stack_base;
2650 }
2651 while (slf_frame.check (aTHX_ &slf_frame));
2652
2653 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2654
2655 /* exception handling */
2656 if (ecb_expect_false (CORO_THROW))
2657 {
2658 SV *exception = sv_2mortal (CORO_THROW);
2659
2660 CORO_THROW = 0;
2661 sv_setsv (ERRSV, exception);
2662 croak (0);
2663 }
2664
2665 /* return value handling - mostly like entersub */
2666 /* make sure we put something on the stack in scalar context */
2667 if (GIMME_V == G_SCALAR
2668 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2669 {
2670 dSP;
2671 SV **bot = PL_stack_base + checkmark;
2672
2673 if (sp == bot) /* too few, push undef */
2674 bot [1] = &PL_sv_undef;
2675 else /* too many, take last one */
2676 bot [1] = *sp;
2677
2678 SP = bot + 1;
2679
2680 PUTBACK;
2681 }
2682
2683 return NORMAL;
2684}
2685
2686static void
2687api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2688{
2689 int i;
2690 SV **arg = PL_stack_base + ax;
2691 int items = PL_stack_sp - arg + 1;
2692
2693 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2694
2695 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2696 && PL_op->op_ppaddr != pp_slf)
2697 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2698
2699 CvFLAGS (cv) |= CVf_SLF;
2700 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2701 slf_cv = cv;
2702
2703 /* we patch the op, and then re-run the whole call */
2704 /* we have to put the same argument on the stack for this to work */
2705 /* and this will be done by pp_restore */
2706 slf_restore.op_next = (OP *)&slf_restore;
2707 slf_restore.op_type = OP_CUSTOM;
2708 slf_restore.op_ppaddr = pp_restore;
2709 slf_restore.op_first = PL_op;
2710
2711 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2712
2713 if (PL_op->op_flags & OPf_STACKED)
2714 {
2715 if (items > slf_arga)
2716 {
2717 slf_arga = items;
2718 Safefree (slf_argv);
2719 New (0, slf_argv, slf_arga, SV *);
2720 }
2721
2722 slf_argc = items;
2723
2724 for (i = 0; i < items; ++i)
2725 slf_argv [i] = SvREFCNT_inc (arg [i]);
2726 }
2727 else
2728 slf_argc = 0;
2729
2730 PL_op->op_ppaddr = pp_slf;
2731 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2732
2733 PL_op = (OP *)&slf_restore;
2734}
2735
2736/*****************************************************************************/
2737/* dynamic wind */
2738
2739static void
2740on_enterleave_call (pTHX_ SV *cb)
2741{
2742 dSP;
2743
2744 PUSHSTACK;
2745
2746 PUSHMARK (SP);
2747 PUTBACK;
2748 call_sv (cb, G_VOID | G_DISCARD);
2749 SPAGAIN;
2750
2751 POPSTACK;
2752}
2753
2754static SV *
2755coro_avp_pop_and_free (pTHX_ AV **avp)
2756{
2757 AV *av = *avp;
2758 SV *res = av_pop (av);
2759
2760 if (AvFILLp (av) < 0)
2761 {
2762 *avp = 0;
2763 SvREFCNT_dec (av);
2764 }
2765
2766 return res;
2767}
2768
2769static void
2770coro_pop_on_enter (pTHX_ void *coro)
2771{
2772 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2773 SvREFCNT_dec (cb);
2774}
2775
2776static void
2777coro_pop_on_leave (pTHX_ void *coro)
2778{
2779 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2780 on_enterleave_call (aTHX_ sv_2mortal (cb));
2781}
2782
2783/*****************************************************************************/
2784/* PerlIO::cede */
2785
2786typedef struct
2787{
2788 PerlIOBuf base;
2789 NV next, every;
2790} PerlIOCede;
2791
2792static IV ecb_cold
2793PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2794{
2795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2796
2797 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2798 self->next = nvtime () + self->every;
2799
2800 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2801}
2802
2803static SV * ecb_cold
2804PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2805{
2806 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2807
2808 return newSVnv (self->every);
2809}
2810
2811static IV
2812PerlIOCede_flush (pTHX_ PerlIO *f)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815 double now = nvtime ();
2816
2817 if (now >= self->next)
2818 {
2819 api_cede (aTHX);
2820 self->next = now + self->every;
2821 }
2822
2823 return PerlIOBuf_flush (aTHX_ f);
2824}
2825
2826static PerlIO_funcs PerlIO_cede =
2827{
2828 sizeof(PerlIO_funcs),
2829 "cede",
2830 sizeof(PerlIOCede),
2831 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2832 PerlIOCede_pushed,
2833 PerlIOBuf_popped,
2834 PerlIOBuf_open,
2835 PerlIOBase_binmode,
2836 PerlIOCede_getarg,
2837 PerlIOBase_fileno,
2838 PerlIOBuf_dup,
2839 PerlIOBuf_read,
2840 PerlIOBuf_unread,
2841 PerlIOBuf_write,
2842 PerlIOBuf_seek,
2843 PerlIOBuf_tell,
2844 PerlIOBuf_close,
2845 PerlIOCede_flush,
2846 PerlIOBuf_fill,
2847 PerlIOBase_eof,
2848 PerlIOBase_error,
2849 PerlIOBase_clearerr,
2850 PerlIOBase_setlinebuf,
2851 PerlIOBuf_get_base,
2852 PerlIOBuf_bufsiz,
2853 PerlIOBuf_get_ptr,
2854 PerlIOBuf_get_cnt,
2855 PerlIOBuf_set_ptrcnt,
2856};
2857
2858/*****************************************************************************/
2859/* Coro::Semaphore & Coro::Signal */
2860
2861static SV *
2862coro_waitarray_new (pTHX_ int count)
2863{
2864 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2865 AV *av = newAV ();
2866 SV **ary;
2867
2868 /* unfortunately, building manually saves memory */
2869 Newx (ary, 2, SV *);
2870 AvALLOC (av) = ary;
2871#if PERL_VERSION_ATLEAST (5,10,0)
2872 AvARRAY (av) = ary;
2873#else
2874 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2875 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2876 SvPVX ((SV *)av) = (char *)ary;
2877#endif
2878 AvMAX (av) = 1;
2879 AvFILLp (av) = 0;
2880 ary [0] = newSViv (count);
2881
2882 return newRV_noinc ((SV *)av);
2883}
2884
2885/* semaphore */
2886
2887static void
2888coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2889{
2890 SV *count_sv = AvARRAY (av)[0];
2891 IV count = SvIVX (count_sv);
2892
2893 count += adjust;
2894 SvIVX (count_sv) = count;
2895
2896 /* now wake up as many waiters as are expected to lock */
2897 while (count > 0 && AvFILLp (av) > 0)
2898 {
2899 SV *cb;
2900
2901 /* swap first two elements so we can shift a waiter */
2902 AvARRAY (av)[0] = AvARRAY (av)[1];
2903 AvARRAY (av)[1] = count_sv;
2904 cb = av_shift (av);
2905
2906 if (SvOBJECT (cb))
2907 {
2908 api_ready (aTHX_ cb);
2909 --count;
2910 }
2911 else if (SvTYPE (cb) == SVt_PVCV)
2912 {
2913 dSP;
2914 PUSHMARK (SP);
2915 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2916 PUTBACK;
2917 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2918 }
2919
2920 SvREFCNT_dec (cb);
2921 }
2922}
2923
2924static void
2925coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2926{
2927 /* call $sem->adjust (0) to possibly wake up some other waiters */
2928 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2929}
2930
2931static int
2932slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2933{
2934 AV *av = (AV *)frame->data;
2935 SV *count_sv = AvARRAY (av)[0];
2936 SV *coro_hv = SvRV (coro_current);
2937
2938 /* if we are about to throw, don't actually acquire the lock, just throw */
2939 if (CORO_THROW)
2940 return 0;
2941 else if (SvIVX (count_sv) > 0)
2942 {
2943 frame->destroy = 0;
2944
2945 if (acquire)
2946 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2947 else
2948 coro_semaphore_adjust (aTHX_ av, 0);
2949
2950 return 0;
2951 }
2952 else
2953 {
2954 int i;
2955 /* if we were woken up but can't down, we look through the whole */
2956 /* waiters list and only add us if we aren't in there already */
2957 /* this avoids some degenerate memory usage cases */
2958 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2959 if (AvARRAY (av)[i] == coro_hv)
2960 return 1;
2961
2962 av_push (av, SvREFCNT_inc (coro_hv));
2963 return 1;
2964 }
2965}
2966
2967static int
2968slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2969{
2970 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2971}
2972
2973static int
2974slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2975{
2976 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2977}
2978
2979static void
2980slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2981{
2982 AV *av = (AV *)SvRV (arg [0]);
2983
2984 if (SvIVX (AvARRAY (av)[0]) > 0)
2985 {
2986 frame->data = (void *)av;
2987 frame->prepare = prepare_nop;
2988 }
2989 else
2990 {
2991 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2992
2993 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2994 frame->prepare = prepare_schedule;
2995 /* to avoid race conditions when a woken-up coro gets terminated */
2996 /* we arrange for a temporary on_destroy that calls adjust (0) */
2997 frame->destroy = coro_semaphore_destroy;
2998 }
2999}
3000
3001static void
3002slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3003{
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_down;
3006}
3007
3008static void
3009slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3010{
3011 if (items >= 2)
3012 {
3013 /* callback form */
3014 AV *av = (AV *)SvRV (arg [0]);
3015 SV *cb_cv = s_get_cv_croak (arg [1]);
3016
3017 av_push (av, SvREFCNT_inc_NN (cb_cv));
3018
3019 if (SvIVX (AvARRAY (av)[0]) > 0)
3020 coro_semaphore_adjust (aTHX_ av, 0);
3021
3022 frame->prepare = prepare_nop;
3023 frame->check = slf_check_nop;
3024 }
3025 else
3026 {
3027 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3028 frame->check = slf_check_semaphore_wait;
3029 }
3030}
3031
3032/* signal */
3033
3034static void
3035coro_signal_wake (pTHX_ AV *av, int count)
3036{
3037 SvIVX (AvARRAY (av)[0]) = 0;
3038
3039 /* now signal count waiters */
3040 while (count > 0 && AvFILLp (av) > 0)
3041 {
3042 SV *cb;
3043
3044 /* swap first two elements so we can shift a waiter */
3045 cb = AvARRAY (av)[0];
3046 AvARRAY (av)[0] = AvARRAY (av)[1];
3047 AvARRAY (av)[1] = cb;
3048
3049 cb = av_shift (av);
3050
3051 if (SvTYPE (cb) == SVt_PVCV)
3052 {
3053 dSP;
3054 PUSHMARK (SP);
3055 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3056 PUTBACK;
3057 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3058 }
3059 else
3060 {
3061 api_ready (aTHX_ cb);
3062 sv_setiv (cb, 0); /* signal waiter */
3063 }
3064
3065 SvREFCNT_dec (cb);
3066
3067 --count;
3068 }
3069}
3070
3071static int
3072slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3073{
3074 /* if we are about to throw, also stop waiting */
3075 return SvROK ((SV *)frame->data) && !CORO_THROW;
3076}
3077
3078static void
3079slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3080{
3081 AV *av = (AV *)SvRV (arg [0]);
3082
3083 if (items >= 2)
3084 {
3085 SV *cb_cv = s_get_cv_croak (arg [1]);
3086 av_push (av, SvREFCNT_inc_NN (cb_cv));
3087
3088 if (SvIVX (AvARRAY (av)[0]))
3089 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3090
3091 frame->prepare = prepare_nop;
3092 frame->check = slf_check_nop;
3093 }
3094 else if (SvIVX (AvARRAY (av)[0]))
3095 {
3096 SvIVX (AvARRAY (av)[0]) = 0;
3097 frame->prepare = prepare_nop;
3098 frame->check = slf_check_nop;
3099 }
3100 else
3101 {
3102 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3103
3104 av_push (av, waiter);
3105
3106 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_signal_wait;
3109 }
3110}
3111
3112/*****************************************************************************/
3113/* Coro::AIO */
3114
3115#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3116
3117/* helper storage struct */
3118struct io_state
3119{
3120 int errorno;
3121 I32 laststype; /* U16 in 5.10.0 */
3122 int laststatval;
3123 Stat_t statcache;
3124};
3125
3126static void
3127coro_aio_callback (pTHX_ CV *cv)
3128{
3129 dXSARGS;
3130 AV *state = (AV *)S_GENSUB_ARG;
3131 SV *coro = av_pop (state);
3132 SV *data_sv = newSV (sizeof (struct io_state));
3133
3134 av_extend (state, items - 1);
3135
3136 sv_upgrade (data_sv, SVt_PV);
3137 SvCUR_set (data_sv, sizeof (struct io_state));
3138 SvPOK_only (data_sv);
3139
3140 {
3141 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3142
3143 data->errorno = errno;
3144 data->laststype = PL_laststype;
3145 data->laststatval = PL_laststatval;
3146 data->statcache = PL_statcache;
3147 }
3148
3149 /* now build the result vector out of all the parameters and the data_sv */
3150 {
3151 int i;
3152
3153 for (i = 0; i < items; ++i)
3154 av_push (state, SvREFCNT_inc_NN (ST (i)));
3155 }
3156
3157 av_push (state, data_sv);
3158
3159 api_ready (aTHX_ coro);
3160 SvREFCNT_dec (coro);
3161 SvREFCNT_dec ((AV *)state);
3162}
3163
3164static int
3165slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3166{
3167 AV *state = (AV *)frame->data;
3168
3169 /* if we are about to throw, return early */
3170 /* this does not cancel the aio request, but at least */
3171 /* it quickly returns */
3172 if (CORO_THROW)
3173 return 0;
3174
3175 /* one element that is an RV? repeat! */
3176 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3177 return 1;
3178
3179 /* restore status */
3180 {
3181 SV *data_sv = av_pop (state);
3182 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3183
3184 errno = data->errorno;
3185 PL_laststype = data->laststype;
3186 PL_laststatval = data->laststatval;
3187 PL_statcache = data->statcache;
3188
3189 SvREFCNT_dec (data_sv);
3190 }
3191
3192 /* push result values */
3193 {
3194 dSP;
3195 int i;
3196
3197 EXTEND (SP, AvFILLp (state) + 1);
3198 for (i = 0; i <= AvFILLp (state); ++i)
3199 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3200
3201 PUTBACK;
3202 }
844 3203
845 return 0; 3204 return 0;
846} 3205}
847 3206
848static void 3207static void
849api_ready (SV *coro) 3208slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
850{ 3209{
851 coro_enq (SvREFCNT_inc (coro)); 3210 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
852} 3211 SV *coro_hv = SvRV (coro_current);
3212 struct coro *coro = SvSTATE_hv (coro_hv);
853 3213
854static void 3214 /* put our coroutine id on the state arg */
855api_schedule (int cede) 3215 av_push (state, SvREFCNT_inc_NN (coro_hv));
856{
857 SV *prev, *next;
858 3216
859 prev = GvSV (coro_current); 3217 /* first see whether we have a non-zero priority and set it as AIO prio */
3218 if (coro->prio)
3219 {
3220 dSP;
860 3221
861 if (cede) 3222 static SV *prio_cv;
862 coro_enq (SvREFCNT_inc (prev)); 3223 static SV *prio_sv;
863 3224
864 next = coro_deq (PRIO_MIN); 3225 if (ecb_expect_false (!prio_cv))
3226 {
3227 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3228 prio_sv = newSViv (0);
3229 }
865 3230
866 if (!next) 3231 PUSHMARK (SP);
867 next = SvREFCNT_inc (GvSV (coro_idle)); 3232 sv_setiv (prio_sv, coro->prio);
3233 XPUSHs (prio_sv);
868 3234
869 GvSV (coro_current) = SvREFCNT_inc (next); 3235 PUTBACK;
870 transfer (aTHX_ 3236 call_sv (prio_cv, G_VOID | G_DISCARD);
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3237 }
872 sv_to_coro (next, "Coro::schedule", "next coroutine"),
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
874 SvREFCNT_dec (next);
875 SvREFCNT_dec (prev);
876}
877 3238
3239 /* now call the original request */
3240 {
3241 dSP;
3242 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3243 int i;
3244
3245 PUSHMARK (SP);
3246
3247 /* first push all args to the stack */
3248 EXTEND (SP, items + 1);
3249
3250 for (i = 0; i < items; ++i)
3251 PUSHs (arg [i]);
3252
3253 /* now push the callback closure */
3254 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3255
3256 /* now call the AIO function - we assume our request is uncancelable */
3257 PUTBACK;
3258 call_sv ((SV *)req, G_VOID | G_DISCARD);
3259 }
3260
3261 /* now that the request is going, we loop till we have a result */
3262 frame->data = (void *)state;
3263 frame->prepare = prepare_schedule;
3264 frame->check = slf_check_aio_req;
3265}
3266
3267static void
3268coro_aio_req_xs (pTHX_ CV *cv)
3269{
3270 dXSARGS;
3271
3272 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3273
3274 XSRETURN_EMPTY;
3275}
3276
3277/*****************************************************************************/
3278
3279#if CORO_CLONE
3280# include "clone.c"
3281#endif
3282
3283/*****************************************************************************/
3284
3285static SV *
3286coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3287{
3288 SV *coro_sv;
3289 struct coro *coro;
3290 MAGIC *mg;
3291 HV *hv;
3292 SV *cb;
3293 int i;
3294
3295 if (argc > 0)
3296 {
3297 cb = s_get_cv_croak (argv [0]);
3298
3299 if (!is_coro)
3300 {
3301 if (CvISXSUB (cb))
3302 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3303
3304 if (!CvROOT (cb))
3305 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3306 }
3307 }
3308
3309 Newz (0, coro, 1, struct coro);
3310 coro->args = newAV ();
3311 coro->flags = CF_NEW;
3312
3313 if (coro_first) coro_first->prev = coro;
3314 coro->next = coro_first;
3315 coro_first = coro;
3316
3317 coro->hv = hv = newHV ();
3318 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3319 mg->mg_flags |= MGf_DUP;
3320 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3321
3322 if (argc > 0)
3323 {
3324 av_extend (coro->args, argc + is_coro - 1);
3325
3326 if (is_coro)
3327 {
3328 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3329 cb = (SV *)cv_coro_run;
3330 }
3331
3332 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3333
3334 for (i = 1; i < argc; i++)
3335 av_push (coro->args, newSVsv (argv [i]));
3336 }
3337
3338 return coro_sv;
3339}
3340
3341#ifndef __cplusplus
3342ecb_cold XS(boot_Coro__State);
3343#endif
3344
3345#if CORO_JIT
3346
3347static void ecb_noinline ecb_cold
3348pushav_3uv (pTHX_ UV a, UV b, UV c)
3349{
3350 dSP;
3351 AV *av = newAV ();
3352
3353 av_store (av, 2, newSVuv (c));
3354 av_store (av, 1, newSVuv (b));
3355 av_store (av, 0, newSVuv (a));
3356
3357 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3358
3359 PUTBACK;
3360}
3361
3362static void ecb_noinline ecb_cold
3363jit_init (pTHX)
3364{
3365 dSP;
3366 SV *load, *save;
3367 char *map_base;
3368 char *load_ptr, *save_ptr;
3369 STRLEN load_len, save_len, map_len;
3370 int count;
3371
3372 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3373
3374 PUSHMARK (SP);
3375#define VARx(name,expr,type) pushav_3uv (aTHX_ (UV)&(expr), offsetof (perl_slots, name), sizeof (type));
3376# include "state.h"
3377#undef VARx
3378 count = call_pv ("Coro::State::_jit", G_ARRAY);
3379 SPAGAIN;
3380
3381 save = POPs; save_ptr = SvPVbyte (save, save_len);
3382 load = POPs; load_ptr = SvPVbyte (load, load_len);
3383
3384 map_len = load_len + save_len + 16;
3385
3386 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3387
3388 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3389
3390 load_perl_slots = (load_save_perl_slots_type)map_base;
3391 memcpy (map_base, load_ptr, load_len);
3392
3393 map_base += (load_len + 15) & ~15;
3394
3395 save_perl_slots = (load_save_perl_slots_type)map_base;
3396 memcpy (map_base, save_ptr, save_len);
3397
3398 /* we are good citizens and try to make the page read-only, so the evil evil */
3399 /* hackers might have it a bit more difficult */
3400 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3401
3402 PUTBACK;
3403 eval_pv ("undef &Coro::State::_jit", 1);
3404}
3405
3406#endif
3407
878MODULE = Coro::State PACKAGE = Coro::State 3408MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 3409
880PROTOTYPES: ENABLE 3410PROTOTYPES: DISABLE
881 3411
882BOOT: 3412BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 3413{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3414#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3415# if CORO_PTHREAD
3416 coro_thx = PERL_GET_CONTEXT;
3417# endif
3418#endif
3419 BOOT_PAGESIZE;
3420
3421 /* perl defines these to check for existance first, but why it doesn't */
3422 /* just create them one at init time is not clear to me, except for */
3423 /* programs trying to delete them, but... */
3424 /* anyway, we declare this as invalid and make sure they are initialised here */
3425 DEFSV;
3426 ERRSV;
3427
3428 cctx_current = cctx_new_empty ();
3429
3430 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3431 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3432
3433 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3434 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3435 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3436
3437 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3438 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3439 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3440
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3441 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 3442
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3443 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3444 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3445 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3446 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 3447
896 main_mainstack = PL_mainstack; 3448 main_mainstack = PL_mainstack;
3449 main_top_env = PL_top_env;
897 3450
3451 while (main_top_env->je_prev)
3452 main_top_env = main_top_env->je_prev;
3453
3454 {
3455 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3456
3457 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3458 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3459
3460 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3461 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3462 }
3463
898 coroapi.ver = CORO_API_VERSION; 3464 coroapi.ver = CORO_API_VERSION;
3465 coroapi.rev = CORO_API_REVISION;
3466
899 coroapi.transfer = api_transfer; 3467 coroapi.transfer = api_transfer;
900}
901 3468
902Coro::State 3469 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 3470 coroapi.execute_slf = api_execute_slf;
904 SV * args 3471 coroapi.prepare_nop = prepare_nop;
3472 coroapi.prepare_schedule = prepare_schedule;
3473 coroapi.prepare_cede = prepare_cede;
3474 coroapi.prepare_cede_notself = prepare_cede_notself;
3475
3476 time_init (aTHX);
3477
3478 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3479#if CORO_JIT
3480 PUTBACK;
3481 jit_init (aTHX);
3482 SPAGAIN;
3483#endif
3484}
3485
3486SV *
3487new (SV *klass, ...)
3488 ALIAS:
3489 Coro::new = 1
3490 CODE:
3491 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3492 OUTPUT:
3493 RETVAL
3494
3495void
3496transfer (...)
3497 PROTOTYPE: $$
3498 CODE:
3499 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3500
3501void
3502_exit (int code)
905 PROTOTYPE: $ 3503 PROTOTYPE: $
3504 CODE:
3505 _exit (code);
3506
3507SV *
3508clone (Coro::State coro)
3509 CODE:
3510{
3511#if CORO_CLONE
3512 struct coro *ncoro = coro_clone (aTHX_ coro);
3513 MAGIC *mg;
3514 /* TODO: too much duplication */
3515 ncoro->hv = newHV ();
3516 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3517 mg->mg_flags |= MGf_DUP;
3518 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3519#else
3520 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3521#endif
3522}
3523 OUTPUT:
3524 RETVAL
3525
3526int
3527cctx_stacksize (int new_stacksize = 0)
3528 PROTOTYPE: ;$
3529 CODE:
3530 RETVAL = cctx_stacksize;
3531 if (new_stacksize)
3532 {
3533 cctx_stacksize = new_stacksize;
3534 ++cctx_gen;
3535 }
3536 OUTPUT:
3537 RETVAL
3538
3539int
3540cctx_max_idle (int max_idle = 0)
3541 PROTOTYPE: ;$
3542 CODE:
3543 RETVAL = cctx_max_idle;
3544 if (max_idle > 1)
3545 cctx_max_idle = max_idle;
3546 OUTPUT:
3547 RETVAL
3548
3549int
3550cctx_count ()
3551 PROTOTYPE:
3552 CODE:
3553 RETVAL = cctx_count;
3554 OUTPUT:
3555 RETVAL
3556
3557int
3558cctx_idle ()
3559 PROTOTYPE:
3560 CODE:
3561 RETVAL = cctx_idle;
3562 OUTPUT:
3563 RETVAL
3564
3565void
3566list ()
3567 PROTOTYPE:
3568 PPCODE:
3569{
3570 struct coro *coro;
3571 for (coro = coro_first; coro; coro = coro->next)
3572 if (coro->hv)
3573 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3574}
3575
3576void
3577call (Coro::State coro, SV *coderef)
3578 ALIAS:
3579 eval = 1
3580 CODE:
3581{
3582 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3583 {
3584 struct coro *current = SvSTATE_current;
3585 struct CoroSLF slf_save;
3586
3587 if (current != coro)
3588 {
3589 PUTBACK;
3590 save_perl (aTHX_ current);
3591 load_perl (aTHX_ coro);
3592 /* the coro is most likely in an active SLF call.
3593 * while not strictly required (the code we execute is
3594 * not allowed to call any SLF functions), it's cleaner
3595 * to reinitialise the slf_frame and restore it later.
3596 * This might one day allow us to actually do SLF calls
3597 * from code executed here.
3598 */
3599 slf_save = slf_frame;
3600 slf_frame.prepare = 0;
3601 SPAGAIN;
3602 }
3603
3604 PUSHSTACK;
3605
3606 PUSHMARK (SP);
3607 PUTBACK;
3608
3609 if (ix)
3610 eval_sv (coderef, 0);
3611 else
3612 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3613
3614 POPSTACK;
3615 SPAGAIN;
3616
3617 if (current != coro)
3618 {
3619 PUTBACK;
3620 slf_frame = slf_save;
3621 save_perl (aTHX_ coro);
3622 load_perl (aTHX_ current);
3623 SPAGAIN;
3624 }
3625 }
3626}
3627
3628SV *
3629is_ready (Coro::State coro)
3630 PROTOTYPE: $
3631 ALIAS:
3632 is_ready = CF_READY
3633 is_running = CF_RUNNING
3634 is_new = CF_NEW
3635 is_destroyed = CF_ZOMBIE
3636 is_zombie = CF_ZOMBIE
3637 is_suspended = CF_SUSPENDED
3638 CODE:
3639 RETVAL = boolSV (coro->flags & ix);
3640 OUTPUT:
3641 RETVAL
3642
3643void
3644throw (Coro::State self, SV *exception = &PL_sv_undef)
3645 PROTOTYPE: $;$
906 CODE: 3646 CODE:
907 Coro__State coro; 3647{
3648 struct coro *current = SvSTATE_current;
3649 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3650 SvREFCNT_dec (*exceptionp);
3651 SvGETMAGIC (exception);
3652 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3653}
908 3654
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3655void
910 croak ("Coro::State::_newprocess expects an arrayref"); 3656api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3657 PROTOTYPE: $;$
3658 C_ARGS: aTHX_ coro, flags
3659
3660SV *
3661has_cctx (Coro::State coro)
3662 PROTOTYPE: $
3663 CODE:
3664 /* maybe manage the running flag differently */
3665 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3666 OUTPUT:
3667 RETVAL
3668
3669int
3670is_traced (Coro::State coro)
3671 PROTOTYPE: $
3672 CODE:
3673 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3674 OUTPUT:
3675 RETVAL
3676
3677UV
3678rss (Coro::State coro)
3679 PROTOTYPE: $
3680 ALIAS:
3681 usecount = 1
3682 CODE:
3683 switch (ix)
3684 {
3685 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3686 case 1: RETVAL = coro->usecount; break;
911 3687 }
912 New (0, coro, 1, struct coro); 3688 OUTPUT:
913
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
915 coro->mainstack = 0; /* actual work is done inside transfer */
916 coro->stack = 0;
917
918 RETVAL = coro; 3689 RETVAL
3690
3691void
3692force_cctx ()
3693 PROTOTYPE:
3694 CODE:
3695 cctx_current->idle_sp = 0;
3696
3697void
3698swap_defsv (Coro::State self)
3699 PROTOTYPE: $
3700 ALIAS:
3701 swap_defav = 1
3702 CODE:
3703 if (!self->slot)
3704 croak ("cannot swap state with coroutine that has no saved state,");
3705 else
3706 {
3707 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3708 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3709
3710 SV *tmp = *src; *src = *dst; *dst = tmp;
3711 }
3712
3713void
3714cancel (Coro::State self)
3715 CODE:
3716 coro_state_destroy (aTHX_ self);
3717
3718SV *
3719enable_times (int enabled = enable_times)
3720 CODE:
3721{
3722 RETVAL = boolSV (enable_times);
3723
3724 if (enabled != enable_times)
3725 {
3726 enable_times = enabled;
3727
3728 coro_times_update ();
3729 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3730 }
3731}
919 OUTPUT: 3732 OUTPUT:
920 RETVAL 3733 RETVAL
921 3734
922void 3735void
923transfer(prev, next, flags) 3736times (Coro::State self)
924 Coro::State_or_hashref prev 3737 PPCODE:
925 Coro::State_or_hashref next 3738{
926 int flags 3739 struct coro *current = SvSTATE (coro_current);
927 PROTOTYPE: @ 3740
3741 if (ecb_expect_false (current == self))
3742 {
3743 coro_times_update ();
3744 coro_times_add (SvSTATE (coro_current));
3745 }
3746
3747 EXTEND (SP, 2);
3748 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3749 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3750
3751 if (ecb_expect_false (current == self))
3752 coro_times_sub (SvSTATE (coro_current));
3753}
3754
3755void
3756swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3757 CODE:
3758{
3759 struct coro *current = SvSTATE_current;
3760
3761 if (current == coro)
3762 SWAP_SVS (current);
3763
3764 if (!coro->swap_sv)
3765 coro->swap_sv = newAV ();
3766
3767 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3768 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3769
3770 if (current == coro)
3771 SWAP_SVS (current);
3772}
3773
3774
3775MODULE = Coro::State PACKAGE = Coro
3776
3777BOOT:
3778{
3779 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3780 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3781 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3782 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3783 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3784 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3785 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3786 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3787
3788 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3789 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3790 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3791 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3792
3793 coro_stash = gv_stashpv ("Coro", TRUE);
3794
3795 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3796 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3797 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3798 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3799 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3800 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3801
3802 {
3803 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3804
3805 coroapi.schedule = api_schedule;
3806 coroapi.schedule_to = api_schedule_to;
3807 coroapi.cede = api_cede;
3808 coroapi.cede_notself = api_cede_notself;
3809 coroapi.ready = api_ready;
3810 coroapi.is_ready = api_is_ready;
3811 coroapi.nready = coro_nready;
3812 coroapi.current = coro_current;
3813
3814 /*GCoroAPI = &coroapi;*/
3815 sv_setiv (sv, (IV)&coroapi);
3816 SvREADONLY_on (sv);
3817 }
3818}
3819
3820SV *
3821async (...)
3822 PROTOTYPE: &@
928 CODE: 3823 CODE:
929 PUTBACK; 3824 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
930 transfer (aTHX_ prev, next, flags); 3825 api_ready (aTHX_ RETVAL);
931 SPAGAIN; 3826 OUTPUT:
3827 RETVAL
932 3828
933void 3829void
934DESTROY(coro) 3830_destroy (Coro::State coro)
935 Coro::State coro 3831 CODE:
936 CODE: 3832 /* used by the manager thread */
937 3833 coro_state_destroy (aTHX_ coro);
938 if (coro->mainstack && coro->mainstack != main_mainstack)
939 {
940 struct coro temp;
941
942 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944 LOAD(aTHX_ coro);
945 SPAGAIN;
946
947 destroy_stacks (aTHX);
948
949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
951
952 coro->mainstack = 0;
953 }
954
955 deallocate_stack (coro);
956
957 Safefree (coro);
958 3834
959void 3835void
960flush() 3836on_destroy (Coro::State coro, SV *cb)
961 CODE: 3837 CODE:
962#ifdef MAY_FLUSH 3838 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
963 flush_padlist_cache ();
964#endif
965 3839
966void 3840void
967_exit(code) 3841join (...)
968 int code 3842 CODE:
3843 CORO_EXECUTE_SLF_XS (slf_init_join);
3844
3845void
3846terminate (...)
3847 CODE:
3848 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3849
3850void
3851cancel (...)
3852 CODE:
3853 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3854
3855int
3856safe_cancel (Coro::State self, ...)
3857 C_ARGS: aTHX_ self, &ST (1), items - 1
3858
3859void
3860schedule (...)
3861 CODE:
3862 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3863
3864void
3865schedule_to (...)
3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3868
3869void
3870cede_to (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3873
3874void
3875cede (...)
3876 CODE:
3877 CORO_EXECUTE_SLF_XS (slf_init_cede);
3878
3879void
3880cede_notself (...)
3881 CODE:
3882 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3883
3884void
3885_set_current (SV *current)
969 PROTOTYPE: $ 3886 PROTOTYPE: $
970 CODE: 3887 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 3888 SvREFCNT_dec (SvRV (coro_current));
972 _exit (code); 3889 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
973#else
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978
979MODULE = Coro::State PACKAGE = Coro::Cont
980
981# this is slightly dirty (should expose a c-level api)
982 3890
983void 3891void
984yield(...) 3892_set_readyhook (SV *hook)
985 PROTOTYPE: @ 3893 PROTOTYPE: $
986 CODE: 3894 CODE:
987 static SV *returnstk;
988 SV *sv;
989 AV *defav = GvAV (PL_defgv);
990 struct coro *prev, *next;
991
992 if (!returnstk)
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv); 3895 SvREFCNT_dec (coro_readyhook);
1006 3896 SvGETMAGIC (hook);
1007 transfer(aTHX_ prev, next, 0); 3897 if (SvOK (hook))
1008 3898 {
1009MODULE = Coro::State PACKAGE = Coro
1010
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT:
1014{
1015 int i;
1016 HV *stash = gv_stashpv ("Coro", TRUE);
1017
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 3899 coro_readyhook = newSVsv (hook);
1030 3900 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1031 {
1032 SV *sv = perl_get_sv("Coro::API", 1);
1033
1034 coroapi.schedule = api_schedule;
1035 coroapi.ready = api_ready;
1036 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current;
1038
1039 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi);
1041 SvREADONLY_on(sv);
1042 } 3901 }
1043} 3902 else
3903 {
3904 coro_readyhook = 0;
3905 CORO_READYHOOK = 0;
3906 }
1044 3907
1045void 3908int
3909prio (Coro::State coro, int newprio = 0)
3910 PROTOTYPE: $;$
3911 ALIAS:
3912 nice = 1
3913 CODE:
3914{
3915 RETVAL = coro->prio;
3916
3917 if (items > 1)
3918 {
3919 if (ix)
3920 newprio = coro->prio - newprio;
3921
3922 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3923 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3924
3925 coro->prio = newprio;
3926 }
3927}
3928 OUTPUT:
3929 RETVAL
3930
3931SV *
1046ready(self) 3932ready (SV *self)
1047 SV * self 3933 PROTOTYPE: $
1048 CODE: 3934 CODE:
1049 api_ready (self); 3935 RETVAL = boolSV (api_ready (aTHX_ self));
3936 OUTPUT:
3937 RETVAL
1050 3938
1051int 3939int
1052nready(...) 3940nready (...)
1053 PROTOTYPE: 3941 PROTOTYPE:
1054 CODE: 3942 CODE:
1055 RETVAL = coro_nready; 3943 RETVAL = coro_nready;
1056 OUTPUT: 3944 OUTPUT:
1057 RETVAL 3945 RETVAL
1058 3946
1059void 3947void
1060schedule(...) 3948suspend (Coro::State self)
1061 PROTOTYPE: 3949 PROTOTYPE: $
1062 ALIAS:
1063 cede = 1
1064 CODE: 3950 CODE:
1065 api_schedule (ix); 3951 self->flags |= CF_SUSPENDED;
1066 3952
3953void
3954resume (Coro::State self)
3955 PROTOTYPE: $
3956 CODE:
3957 self->flags &= ~CF_SUSPENDED;
3958
3959void
3960_pool_handler (...)
3961 CODE:
3962 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3963
3964void
3965async_pool (SV *cv, ...)
3966 PROTOTYPE: &@
3967 PPCODE:
3968{
3969 HV *hv = (HV *)av_pop (av_async_pool);
3970 AV *av = newAV ();
3971 SV *cb = ST (0);
3972 int i;
3973
3974 av_extend (av, items - 2);
3975 for (i = 1; i < items; ++i)
3976 av_push (av, SvREFCNT_inc_NN (ST (i)));
3977
3978 if ((SV *)hv == &PL_sv_undef)
3979 {
3980 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3981 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3982 SvREFCNT_dec (sv);
3983 }
3984
3985 {
3986 struct coro *coro = SvSTATE_hv (hv);
3987
3988 assert (!coro->invoke_cb);
3989 assert (!coro->invoke_av);
3990 coro->invoke_cb = SvREFCNT_inc (cb);
3991 coro->invoke_av = av;
3992 }
3993
3994 api_ready (aTHX_ (SV *)hv);
3995
3996 if (GIMME_V != G_VOID)
3997 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3998 else
3999 SvREFCNT_dec (hv);
4000}
4001
4002SV *
4003rouse_cb ()
4004 PROTOTYPE:
4005 CODE:
4006 RETVAL = coro_new_rouse_cb (aTHX);
4007 OUTPUT:
4008 RETVAL
4009
4010void
4011rouse_wait (...)
4012 PROTOTYPE: ;$
4013 PPCODE:
4014 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4015
4016void
4017on_enter (SV *block)
4018 ALIAS:
4019 on_leave = 1
4020 PROTOTYPE: &
4021 CODE:
4022{
4023 struct coro *coro = SvSTATE_current;
4024 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4025
4026 block = s_get_cv_croak (block);
4027
4028 if (!*avp)
4029 *avp = newAV ();
4030
4031 av_push (*avp, SvREFCNT_inc (block));
4032
4033 if (!ix)
4034 on_enterleave_call (aTHX_ block);
4035
4036 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4037 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4038 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4039}
4040
4041
4042MODULE = Coro::State PACKAGE = PerlIO::cede
4043
4044BOOT:
4045 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4046
4047
4048MODULE = Coro::State PACKAGE = Coro::Semaphore
4049
4050SV *
4051new (SV *klass, SV *count = 0)
4052 CODE:
4053{
4054 int semcnt = 1;
4055
4056 if (count)
4057 {
4058 SvGETMAGIC (count);
4059
4060 if (SvOK (count))
4061 semcnt = SvIV (count);
4062 }
4063
4064 RETVAL = sv_bless (
4065 coro_waitarray_new (aTHX_ semcnt),
4066 GvSTASH (CvGV (cv))
4067 );
4068}
4069 OUTPUT:
4070 RETVAL
4071
4072# helper for Coro::Channel and others
4073SV *
4074_alloc (int count)
4075 CODE:
4076 RETVAL = coro_waitarray_new (aTHX_ count);
4077 OUTPUT:
4078 RETVAL
4079
4080SV *
4081count (SV *self)
4082 CODE:
4083 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4084 OUTPUT:
4085 RETVAL
4086
4087void
4088up (SV *self, int adjust = 1)
4089 ALIAS:
4090 adjust = 1
4091 CODE:
4092 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4093
4094void
4095down (...)
4096 CODE:
4097 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4098
4099void
4100wait (...)
4101 CODE:
4102 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4103
4104void
4105try (SV *self)
4106 PPCODE:
4107{
4108 AV *av = (AV *)SvRV (self);
4109 SV *count_sv = AvARRAY (av)[0];
4110 IV count = SvIVX (count_sv);
4111
4112 if (count > 0)
4113 {
4114 --count;
4115 SvIVX (count_sv) = count;
4116 XSRETURN_YES;
4117 }
4118 else
4119 XSRETURN_NO;
4120}
4121
4122void
4123waiters (SV *self)
4124 PPCODE:
4125{
4126 AV *av = (AV *)SvRV (self);
4127 int wcount = AvFILLp (av) + 1 - 1;
4128
4129 if (GIMME_V == G_SCALAR)
4130 XPUSHs (sv_2mortal (newSViv (wcount)));
4131 else
4132 {
4133 int i;
4134 EXTEND (SP, wcount);
4135 for (i = 1; i <= wcount; ++i)
4136 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4137 }
4138}
4139
4140MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4141
4142void
4143_may_delete (SV *sem, int count, int extra_refs)
4144 PPCODE:
4145{
4146 AV *av = (AV *)SvRV (sem);
4147
4148 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4149 && AvFILLp (av) == 0 /* no waiters, just count */
4150 && SvIV (AvARRAY (av)[0]) == count)
4151 XSRETURN_YES;
4152
4153 XSRETURN_NO;
4154}
4155
4156MODULE = Coro::State PACKAGE = Coro::Signal
4157
4158SV *
4159new (SV *klass)
4160 CODE:
4161 RETVAL = sv_bless (
4162 coro_waitarray_new (aTHX_ 0),
4163 GvSTASH (CvGV (cv))
4164 );
4165 OUTPUT:
4166 RETVAL
4167
4168void
4169wait (...)
4170 CODE:
4171 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4172
4173void
4174broadcast (SV *self)
4175 CODE:
4176{
4177 AV *av = (AV *)SvRV (self);
4178 coro_signal_wake (aTHX_ av, AvFILLp (av));
4179}
4180
4181void
4182send (SV *self)
4183 CODE:
4184{
4185 AV *av = (AV *)SvRV (self);
4186
4187 if (AvFILLp (av))
4188 coro_signal_wake (aTHX_ av, 1);
4189 else
4190 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4191}
4192
4193IV
4194awaited (SV *self)
4195 CODE:
4196 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4197 OUTPUT:
4198 RETVAL
4199
4200
4201MODULE = Coro::State PACKAGE = Coro::AnyEvent
4202
4203BOOT:
4204 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4205
4206void
4207_schedule (...)
4208 CODE:
4209{
4210 static int incede;
4211
4212 api_cede_notself (aTHX);
4213
4214 ++incede;
4215 while (coro_nready >= incede && api_cede (aTHX))
4216 ;
4217
4218 sv_setsv (sv_activity, &PL_sv_undef);
4219 if (coro_nready >= incede)
4220 {
4221 PUSHMARK (SP);
4222 PUTBACK;
4223 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4224 }
4225
4226 --incede;
4227}
4228
4229
4230MODULE = Coro::State PACKAGE = Coro::AIO
4231
4232void
4233_register (char *target, char *proto, SV *req)
4234 CODE:
4235{
4236 SV *req_cv = s_get_cv_croak (req);
4237 /* newXSproto doesn't return the CV on 5.8 */
4238 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4239 sv_setpv ((SV *)slf_cv, proto);
4240 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4241}
4242
4243MODULE = Coro::State PACKAGE = Coro::Select
4244
4245void
4246patch_pp_sselect ()
4247 CODE:
4248 if (!coro_old_pp_sselect)
4249 {
4250 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4251 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4252 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4253 }
4254
4255void
4256unpatch_pp_sselect ()
4257 CODE:
4258 if (coro_old_pp_sselect)
4259 {
4260 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4261 coro_old_pp_sselect = 0;
4262 }
4263

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