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Comparing Coro/Coro/State.xs (file contents):
Revision 1.12 by root, Sun Jul 22 03:24:10 2001 UTC vs.
Revision 1.409 by root, Sun Jun 12 04:29:15 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#if 1 16#include "schmorp.h"
6# define CHK(x) (void *)0 17#include "ecb.h"
18
19#include <stddef.h>
20#include <stdio.h>
21#include <errno.h>
22#include <assert.h>
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 */
7#else 34#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 35# include <inttypes.h> /* most portable stdint.h */
9#endif 36#endif
10 37
11#define MAY_FLUSH /* increases codesize */ 38#ifdef HAVE_MMAP
39# include <unistd.h>
40# include <sys/mman.h>
41# ifndef MAP_ANONYMOUS
42# ifdef MAP_ANON
43# define MAP_ANONYMOUS MAP_ANON
44# else
45# undef HAVE_MMAP
46# 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
59#endif
12 60
13#define SUB_INIT "Coro::State::initialize" 61#if CORO_USE_VALGRIND
62# include <valgrind/valgrind.h>
63#endif
14 64
15#define TRANSFER_SAVE_DEFAV 0x00000001 65/* the maximum number of idle cctx that will be pooled */
16#define TRANSFER_SAVE_DEFSV 0x00000002 66static int cctx_max_idle = 4;
17#define TRANSFER_SAVE_ERRSV 0x00000004
18 67
19#define TRANSFER_SAVE_ALL -1 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
69# undef CORO_STACKGUARD
70#endif
20 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
88# define STACKLEVEL ((void *)&stacklevel)
89#endif
90
91#define IN_DESTRUCT PL_dirty
92
93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
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;
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 */
130
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 */
172typedef struct coro_cctx
173{
174 struct coro_cctx *next;
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;
184 coro_context cctx;
185
186 U32 gen;
187#if CORO_USE_VALGRIND
188 int valgrind_id;
189#endif
190 unsigned char flags;
191} coro_cctx;
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 */
21struct coro { 221struct coro
22 /* optionally saved, might be zero */ 222{
23 AV *defav; 223 /* the C coroutine allocated to this perl coroutine, if any */
24 SV *defsv; 224 coro_cctx *cctx;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 225
30 /* the stacks and related info (callchain etc..) */ 226 /* ready queue */
31 PERL_SI *curstackinfo; 227 struct coro *next_ready;
32 AV *curstack; 228
229 /* state data */
230 struct CoroSLF slf_frame; /* saved slf frame */
33 AV *mainstack; 231 AV *mainstack;
34 SV **stack_sp; 232 perl_slots *slot; /* basically the saved sp */
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 233
234 CV *startcv; /* the CV to execute */
57 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
58 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;
59}; 266};
60 267
61typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
63 270
64static AV *main_mainstack; /* used to differentiate between $main and others */ 271/* the following variables are effectively part of the perl context */
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 */
65 275
66static HV *padlist_cache; 276/** Coro ********************************************************************/
67 277
68/* mostly copied from op.c:cv_clone2 */ 278#define CORO_PRIO_MAX 3
69STATIC AV * 279#define CORO_PRIO_HIGH 1
70clone_padlist (AV *protopadlist) 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 #ifndef CORO_JIT_TYPE
297 #if __x86_64 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
298 #define CORO_JIT_TYPE "amd64-unix"
299 typedef void (*load_save_perl_slots_type)(perl_slots *);
300 #elif __i386 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
301 #define CORO_JIT_TYPE "x86-unix"
302 typedef void (*load_save_perl_slots_type)(perl_slots *);
303 #else
304 x x x x
305 #undef CORO_JIT
306 #endif
307 #endif
308#endif
309
310#if CORO_JIT
311static load_save_perl_slots_type load_perl_slots, save_perl_slots;
312#endif
313
314/** Coro::Select ************************************************************/
315
316static OP *(*coro_old_pp_sselect) (pTHX);
317static SV *coro_select_select;
318
319/* horrible hack, but if it works... */
320static OP *
321coro_pp_sselect (pTHX)
71{ 322{
72 AV *av; 323 dSP;
73 I32 ix; 324 PUSHMARK (SP - 4); /* fake argument list */
74 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 325 XPUSHs (coro_select_select);
75 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 326 PUTBACK;
76 SV **pname = AvARRAY (protopad_name); 327
77 SV **ppad = AvARRAY (protopad); 328 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
78 I32 fname = AvFILLp (protopad_name); 329 PL_op->op_flags |= OPf_STACKED;
79 I32 fpad = AvFILLp (protopad); 330 PL_op->op_private = 0;
331 return PL_ppaddr [OP_ENTERSUB](aTHX);
332}
333
334/** time stuff **************************************************************/
335
336#ifdef HAS_GETTIMEOFDAY
337
338ECB_INLINE void
339coro_u2time (pTHX_ UV ret[2])
340{
341 struct timeval tv;
342 gettimeofday (&tv, 0);
343
344 ret [0] = tv.tv_sec;
345 ret [1] = tv.tv_usec;
346}
347
348ECB_INLINE double
349coro_nvtime ()
350{
351 struct timeval tv;
352 gettimeofday (&tv, 0);
353
354 return tv.tv_sec + tv.tv_usec * 1e-6;
355}
356
357ECB_INLINE void
358time_init (pTHX)
359{
360 nvtime = coro_nvtime;
361 u2time = coro_u2time;
362}
363
364#else
365
366ECB_INLINE void
367time_init (pTHX)
368{
369 SV **svp;
370
371 require_pv ("Time/HiRes.pm");
372
373 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
374
375 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
376 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
377
378 nvtime = INT2PTR (double (*)(), SvIV (*svp));
379
380 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
381 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
382}
383
384#endif
385
386/** lowlevel stuff **********************************************************/
387
388static SV * ecb_noinline
389coro_get_sv (pTHX_ const char *name, int create)
390{
391#if PERL_VERSION_ATLEAST (5,10,0)
392 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
393 get_sv (name, create);
394#endif
395 return get_sv (name, create);
396}
397
398static AV * ecb_noinline
399coro_get_av (pTHX_ const char *name, int create)
400{
401#if PERL_VERSION_ATLEAST (5,10,0)
402 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
403 get_av (name, create);
404#endif
405 return get_av (name, create);
406}
407
408static HV * ecb_noinline
409coro_get_hv (pTHX_ const char *name, int create)
410{
411#if PERL_VERSION_ATLEAST (5,10,0)
412 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
413 get_hv (name, create);
414#endif
415 return get_hv (name, create);
416}
417
418ECB_INLINE void
419coro_times_update ()
420{
421#ifdef coro_clock_gettime
422 struct timespec ts;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
426 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
427
428 ts.tv_sec = ts.tv_nsec = 0;
429 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
430 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
431#else
432 dTHX;
433 UV tv[2];
434
435 u2time (aTHX_ tv);
436 time_real [0] = tv [0];
437 time_real [1] = tv [1] * 1000;
438#endif
439}
440
441ECB_INLINE void
442coro_times_add (struct coro *c)
443{
444 c->t_real [1] += time_real [1];
445 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
446 c->t_real [0] += time_real [0];
447
448 c->t_cpu [1] += time_cpu [1];
449 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
450 c->t_cpu [0] += time_cpu [0];
451}
452
453ECB_INLINE void
454coro_times_sub (struct coro *c)
455{
456 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
457 c->t_real [1] -= time_real [1];
458 c->t_real [0] -= time_real [0];
459
460 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
461 c->t_cpu [1] -= time_cpu [1];
462 c->t_cpu [0] -= time_cpu [0];
463}
464
465/*****************************************************************************/
466/* magic glue */
467
468#define CORO_MAGIC_type_cv 26
469#define CORO_MAGIC_type_state PERL_MAGIC_ext
470
471#define CORO_MAGIC_NN(sv, type) \
472 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
473 ? SvMAGIC (sv) \
474 : mg_find (sv, type))
475
476#define CORO_MAGIC(sv, type) \
477 (ecb_expect_true (SvMAGIC (sv)) \
478 ? CORO_MAGIC_NN (sv, type) \
479 : 0)
480
481#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
482#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
483
484ECB_INLINE MAGIC *
485SvSTATEhv_p (pTHX_ SV *coro)
486{
487 MAGIC *mg;
488
489 if (ecb_expect_true (
490 SvTYPE (coro) == SVt_PVHV
491 && (mg = CORO_MAGIC_state (coro))
492 && mg->mg_virtual == &coro_state_vtbl
493 ))
494 return mg;
495
496 return 0;
497}
498
499ECB_INLINE struct coro *
500SvSTATE_ (pTHX_ SV *coro)
501{
502 MAGIC *mg;
503
504 if (SvROK (coro))
505 coro = SvRV (coro);
506
507 mg = SvSTATEhv_p (aTHX_ coro);
508 if (!mg)
509 croak ("Coro::State object required");
510
511 return (struct coro *)mg->mg_ptr;
512}
513
514#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
515
516/* faster than SvSTATE, but expects a coroutine hv */
517#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
518#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
519
520/*****************************************************************************/
521/* padlist management and caching */
522
523ECB_INLINE AV *
524coro_derive_padlist (pTHX_ CV *cv)
525{
526 AV *padlist = CvPADLIST (cv);
80 AV *newpadlist, *newpad_name, *newpad; 527 AV *newpadlist, *newpad;
81 SV **npad;
82
83 newpad_name = newAV ();
84 for (ix = fname; ix >= 0; ix--)
85 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
86
87 newpad = newAV ();
88 av_fill (newpad, AvFILLp (protopad));
89 npad = AvARRAY (newpad);
90 528
91 newpadlist = newAV (); 529 newpadlist = newAV ();
92 AvREAL_off (newpadlist); 530 AvREAL_off (newpadlist);
93 av_store (newpadlist, 0, (SV *) newpad_name); 531#if PERL_VERSION_ATLEAST (5,10,0)
532 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
533#else
534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
535#endif
536 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
537 --AvFILLp (padlist);
538
539 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
94 av_store (newpadlist, 1, (SV *) newpad); 540 av_store (newpadlist, 1, (SV *)newpad);
95 541
96 av = newAV (); /* will be @_ */ 542 return newpadlist;
97 av_extend (av, 0); 543}
98 av_store (newpad, 0, (SV *) av);
99 AvFLAGS (av) = AVf_REIFY;
100 544
101 for (ix = fpad; ix > 0; ix--) 545ECB_INLINE void
546free_padlist (pTHX_ AV *padlist)
547{
548 /* may be during global destruction */
549 if (!IN_DESTRUCT)
102 { 550 {
103 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 551 I32 i = AvFILLp (padlist);
104 if (namesv && namesv != &PL_sv_undef) 552
553 while (i > 0) /* special-case index 0 */
105 { 554 {
106 char *name = SvPVX (namesv); /* XXX */ 555 /* we try to be extra-careful here */
107 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 556 AV *av = (AV *)AvARRAY (padlist)[i--];
108 { /* lexical from outside? */ 557 I32 j = AvFILLp (av);
109 npad[ix] = SvREFCNT_inc (ppad[ix]); 558
110 } 559 while (j >= 0)
111 else 560 SvREFCNT_dec (AvARRAY (av)[j--]);
112 { /* our own lexical */ 561
113 SV *sv; 562 AvFILLp (av) = -1;
114 if (*name == '&') 563 SvREFCNT_dec (av);
115 sv = SvREFCNT_inc (ppad[ix]);
116 else if (*name == '@')
117 sv = (SV *) newAV ();
118 else if (*name == '%')
119 sv = (SV *) newHV ();
120 else
121 sv = NEWSV (0, 0);
122 if (!SvPADBUSY (sv))
123 SvPADMY_on (sv);
124 npad[ix] = sv;
125 }
126 } 564 }
127 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 565
128 { 566 SvREFCNT_dec (AvARRAY (padlist)[0]);
129 npad[ix] = SvREFCNT_inc (ppad[ix]); 567
130 } 568 AvFILLp (padlist) = -1;
569 SvREFCNT_dec ((SV*)padlist);
570 }
571}
572
573static int
574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
575{
576 AV *padlist;
577 AV *av = (AV *)mg->mg_obj;
578
579 /* perl manages to free our internal AV and _then_ call us */
580 if (IN_DESTRUCT)
581 return 0;
582
583 /* casting is fun. */
584 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
585 free_padlist (aTHX_ padlist);
586
587 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
588
589 return 0;
590}
591
592static MGVTBL coro_cv_vtbl = {
593 0, 0, 0, 0,
594 coro_cv_free
595};
596
597/* the next two functions merely cache the padlists */
598ECB_INLINE void
599get_padlist (pTHX_ CV *cv)
600{
601 MAGIC *mg = CORO_MAGIC_cv (cv);
602 AV *av;
603
604 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
605 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
131 else 606 else
132 { 607 {
133 SV *sv = NEWSV (0, 0); 608#if CORO_PREFER_PERL_FUNCTIONS
134 SvPADTMP_on (sv); 609 /* this is probably cleaner? but also slower! */
135 npad[ix] = sv; 610 /* in practise, it seems to be less stable */
136 } 611 CV *cp = Perl_cv_clone (aTHX_ cv);
137 } 612 CvPADLIST (cv) = CvPADLIST (cp);
138 613 CvPADLIST (cp) = 0;
139#if 0 /* return -ENOTUNDERSTOOD */ 614 SvREFCNT_dec (cp);
140 /* Now that vars are all in place, clone nested closures. */ 615#else
141 616 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
142 for (ix = fpad; ix > 0; ix--) {
143 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
144 if (namesv
145 && namesv != &PL_sv_undef
146 && !(SvFLAGS(namesv) & SVf_FAKE)
147 && *SvPVX(namesv) == '&'
148 && CvCLONE(ppad[ix]))
149 {
150 CV *kid = cv_clone((CV*)ppad[ix]);
151 SvREFCNT_dec(ppad[ix]);
152 CvCLONE_on(kid);
153 SvPADMY_on(kid);
154 npad[ix] = (SV*)kid;
155 }
156 }
157#endif 617#endif
158 618 }
159 return newpadlist;
160} 619}
161 620
162#ifdef MAY_FLUSH 621ECB_INLINE void
163STATIC AV * 622put_padlist (pTHX_ CV *cv)
164free_padlist (AV *padlist)
165{ 623{
166 /* may be during global destruction */ 624 MAGIC *mg = CORO_MAGIC_cv (cv);
167 if (SvREFCNT(padlist)) 625 AV *av;
626
627 if (ecb_expect_false (!mg))
628 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
629
630 av = (AV *)mg->mg_obj;
631
632 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
633 av_extend (av, AvFILLp (av) + 1);
634
635 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
636}
637
638/** load & save, init *******************************************************/
639
640/* swap sv heads, at least logically */
641static void
642swap_svs (pTHX_ Coro__State c)
643{
644 int i;
645
646 for (i = 0; i <= AvFILLp (c->swap_sv); )
168 { 647 {
169 I32 i = AvFILLp(padlist); 648 SV *a = AvARRAY (c->swap_sv)[i++];
170 while (i >= 0) 649 SV *b = AvARRAY (c->swap_sv)[i++];
650
651 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
652 SV tmp;
653
654 /* swap sv_any */
655 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
656
657 /* swap sv_flags */
658 SvFLAGS (&tmp) = SvFLAGS (a);
659 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
660 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
661
662#if PERL_VERSION_ATLEAST (5,10,0)
663 /* perl 5.10 complicates this _quite_ a bit, but it also is
664 * much faster, so no quarrels here. alternatively, we could
665 * sv_upgrade to avoid this.
666 */
171 { 667 {
172 SV **svp = av_fetch(padlist, i--, FALSE); 668 /* swap sv_u */
173 SV *sv = svp ? *svp : Nullsv; 669 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
174 if (sv) 670
175 SvREFCNT_dec(sv); 671 /* if SvANY points to the head, we need to adjust the pointers,
672 * as the pointer for a still points to b, and maybe vice versa.
673 */
674 #define svany_in_head(type) \
675 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
676
677 if (svany_in_head (SvTYPE (a)))
678 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
679
680 if (svany_in_head (SvTYPE (b)))
681 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
176 } 682 }
177
178 SvREFCNT_dec((SV*)padlist);
179 }
180}
181#endif 683#endif
182
183/* the next two functions merely cache the padlists */
184STATIC void
185get_padlist (CV *cv)
186{
187 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
188
189 if (he && AvFILLp ((AV *)*he) >= 0)
190 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
191 else
192 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
193}
194
195STATIC void
196put_padlist (CV *cv)
197{
198 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
199
200 if (SvTYPE (*he) != SVt_PVAV)
201 { 684 }
202 SvREFCNT_dec (*he);
203 *he = (SV *)newAV ();
204 }
205
206 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
207} 685}
208 686
209#ifdef MAY_FLUSH 687#define SWAP_SVS(coro) \
210STATIC void 688 if (ecb_expect_false ((coro)->swap_sv)) \
211flush_padlist_cache () 689 swap_svs (aTHX_ (coro))
212{
213 HV *hv = padlist_cache;
214 padlist_cache = newHV ();
215 690
216 if (hv_iterinit (hv)) 691static void
217 { 692on_enterleave_call (pTHX_ SV *cb);
218 HE *he;
219 AV *padlist;
220 693
221 while (!!(he = hv_iternext (hv))) 694static void
222 { 695load_perl (pTHX_ Coro__State c)
223 AV *av = (AV *)HeVAL(he); 696{
697 perl_slots *slot = c->slot;
698 c->slot = 0;
224 699
225 /* casting is fun. */ 700 PL_mainstack = c->mainstack;
226 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
227 free_padlist (padlist);
228 }
229 }
230 701
231 SvREFCNT_dec (hv); 702#if CORO_JIT
232} 703 load_perl_slots (slot);
704#else
705 #define VARx(name,expr,type) expr = slot->name;
706 # include "state.h"
707 #undef VARx
233#endif 708#endif
234
235#define SB do {
236#define SE } while (0)
237
238#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
239#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
240
241#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
242
243static void
244load_state(pTHX_ Coro__State c)
245{
246 PL_dowarn = c->dowarn;
247
248 PL_curstackinfo = c->curstackinfo;
249 PL_curstack = c->curstack;
250 PL_mainstack = c->mainstack;
251 PL_stack_sp = c->stack_sp;
252 PL_op = c->op;
253 PL_curpad = c->curpad;
254 PL_stack_base = c->stack_base;
255 PL_stack_max = c->stack_max;
256 PL_tmps_stack = c->tmps_stack;
257 PL_tmps_floor = c->tmps_floor;
258 PL_tmps_ix = c->tmps_ix;
259 PL_tmps_max = c->tmps_max;
260 PL_markstack = c->markstack;
261 PL_markstack_ptr = c->markstack_ptr;
262 PL_markstack_max = c->markstack_max;
263 PL_scopestack = c->scopestack;
264 PL_scopestack_ix = c->scopestack_ix;
265 PL_scopestack_max = c->scopestack_max;
266 PL_savestack = c->savestack;
267 PL_savestack_ix = c->savestack_ix;
268 PL_savestack_max = c->savestack_max;
269 PL_retstack = c->retstack;
270 PL_retstack_ix = c->retstack_ix;
271 PL_retstack_max = c->retstack_max;
272 PL_curcop = c->curcop;
273
274 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
275 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
276 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
277 709
278 { 710 {
279 dSP; 711 dSP;
712
280 CV *cv; 713 CV *cv;
281 714
282 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
283 while ((cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
284 { 717 {
285 AV *padlist = (AV *)POPs;
286
287 if (padlist)
288 {
289 put_padlist (cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
290 CvPADLIST(cv) = padlist; 719 CvDEPTH (cv) = PTR2IV (POPs);
291#ifdef USE_THREADS 720 CvPADLIST (cv) = (AV *)POPs;
292 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
293#endif
294 }
295
296 ++CvDEPTH(cv);
297 } 721 }
298 722
299 PUTBACK; 723 PUTBACK;
300 } 724 }
301}
302 725
726 slf_frame = c->slf_frame;
727 CORO_THROW = c->except;
728
729 if (ecb_expect_false (enable_times))
730 {
731 if (ecb_expect_false (!times_valid))
732 coro_times_update ();
733
734 coro_times_sub (c);
735 }
736
737 if (ecb_expect_false (c->on_enter))
738 {
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
742 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
743 }
744
745 SWAP_SVS (c);
746}
747
303static void 748static void
304save_state(pTHX_ Coro__State c, int flags) 749save_perl (pTHX_ Coro__State c)
305{ 750{
751 SWAP_SVS (c);
752
753 if (ecb_expect_false (c->on_leave))
754 {
755 int i;
756
757 for (i = AvFILLp (c->on_leave); i >= 0; --i)
758 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
759 }
760
761 times_valid = 0;
762
763 if (ecb_expect_false (enable_times))
764 {
765 coro_times_update (); times_valid = 1;
766 coro_times_add (c);
767 }
768
769 c->except = CORO_THROW;
770 c->slf_frame = slf_frame;
771
306 { 772 {
307 dSP; 773 dSP;
308 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
309 PERL_CONTEXT *ccstk = cxstack; 775 PERL_CONTEXT *ccstk = cxstack;
310 PERL_SI *top_si = PL_curstackinfo; 776 PERL_SI *top_si = PL_curstackinfo;
… …
312 /* 778 /*
313 * the worst thing you can imagine happens first - we have to save 779 * the worst thing you can imagine happens first - we have to save
314 * (and reinitialize) all cv's in the whole callchain :( 780 * (and reinitialize) all cv's in the whole callchain :(
315 */ 781 */
316 782
317 PUSHs (Nullsv); 783 XPUSHs (Nullsv);
318 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
319 for (;;) 785 for (;;)
320 { 786 {
321 do 787 while (ecb_expect_true (cxix >= 0))
322 { 788 {
323 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
324 790
325 if (CxTYPE(cx) == CXt_SUB) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
326 { 792 {
327 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
794
328 if (CvDEPTH(cv)) 795 if (ecb_expect_true (CvDEPTH (cv)))
329 { 796 {
330#ifdef USE_THREADS
331 /*XPUSHs ((SV *)CvOWNER(cv));*/
332 /*CvOWNER(cv) = 0;*/
333 /*error must unlock this cv etc.. etc...*/
334#endif
335 EXTEND (SP, CvDEPTH(cv)*2); 797 EXTEND (SP, 3);
336
337 while (--CvDEPTH(cv))
338 {
339 /* this tells the restore code to increment CvDEPTH */
340 PUSHs (Nullsv);
341 PUSHs ((SV *)cv);
342 }
343
344 PUSHs ((SV *)CvPADLIST(cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
345 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
346 801
347 get_padlist (cv); /* this is a monster */ 802 CvDEPTH (cv) = 0;
803 get_padlist (aTHX_ cv);
348 } 804 }
349 } 805 }
350 else if (CxTYPE(cx) == CXt_FORMAT)
351 {
352 /* I never used formats, so how should I know how these are implemented? */
353 /* my bold guess is as a simple, plain sub... */
354 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
355 }
356 } 806 }
357 while (cxix >= 0);
358 807
359 if (top_si->si_type == PERLSI_MAIN) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
360 break; 809 break;
361 810
362 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
363 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
364 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
365 } 814 }
366 815
367 PUTBACK; 816 PUTBACK;
368 } 817 }
369 818
370 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 819 /* allocate some space on the context stack for our purposes */
371 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 820 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
372 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 821 {
822 unsigned int i;
373 823
374 /* I have not the slightest idea of why av_reify is necessary */ 824 for (i = 0; i < SLOT_COUNT; ++i)
375 /* but if it's missing the defav contents magically get replaced sometimes */ 825 CXINC;
376 if (c->defav)
377 av_reify (c->defav);
378 826
379 c->dowarn = PL_dowarn; 827 cxstack_ix -= SLOT_COUNT; /* undo allocation */
828 }
380 829
381 c->curstackinfo = PL_curstackinfo;
382 c->curstack = PL_curstack;
383 c->mainstack = PL_mainstack; 830 c->mainstack = PL_mainstack;
384 c->stack_sp = PL_stack_sp; 831
385 c->op = PL_op; 832 {
386 c->curpad = PL_curpad; 833 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
834
835#if CORO_JIT
836 save_perl_slots (slot);
837#else
838 #define VARx(name,expr,type) slot->name = expr;
839 # include "state.h"
840 #undef VARx
841#endif
842 }
843}
844
845/*
846 * allocate various perl stacks. This is almost an exact copy
847 * of perl.c:init_stacks, except that it uses less memory
848 * on the (sometimes correct) assumption that coroutines do
849 * not usually need a lot of stackspace.
850 */
851#if CORO_PREFER_PERL_FUNCTIONS
852# define coro_init_stacks(thx) init_stacks ()
853#else
854static void
855coro_init_stacks (pTHX)
856{
857 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
858 PL_curstackinfo->si_type = PERLSI_MAIN;
859 PL_curstack = PL_curstackinfo->si_stack;
860 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
861
862 PL_stack_base = AvARRAY(PL_curstack);
387 c->stack_base = PL_stack_base; 863 PL_stack_sp = PL_stack_base;
388 c->stack_max = PL_stack_max; 864 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
389 c->tmps_stack = PL_tmps_stack; 865
390 c->tmps_floor = PL_tmps_floor; 866 New(50,PL_tmps_stack,32,SV*);
391 c->tmps_ix = PL_tmps_ix; 867 PL_tmps_floor = -1;
392 c->tmps_max = PL_tmps_max; 868 PL_tmps_ix = -1;
869 PL_tmps_max = 32;
870
871 New(54,PL_markstack,16,I32);
393 c->markstack = PL_markstack; 872 PL_markstack_ptr = PL_markstack;
394 c->markstack_ptr = PL_markstack_ptr; 873 PL_markstack_max = PL_markstack + 16;
395 c->markstack_max = PL_markstack_max; 874
396 c->scopestack = PL_scopestack; 875#ifdef SET_MARK_OFFSET
397 c->scopestack_ix = PL_scopestack_ix; 876 SET_MARK_OFFSET;
398 c->scopestack_max = PL_scopestack_max; 877#endif
399 c->savestack = PL_savestack; 878
400 c->savestack_ix = PL_savestack_ix; 879 New(54,PL_scopestack,8,I32);
401 c->savestack_max = PL_savestack_max; 880 PL_scopestack_ix = 0;
402 c->retstack = PL_retstack; 881 PL_scopestack_max = 8;
403 c->retstack_ix = PL_retstack_ix; 882
404 c->retstack_max = PL_retstack_max; 883 New(54,PL_savestack,24,ANY);
405 c->curcop = PL_curcop; 884 PL_savestack_ix = 0;
885 PL_savestack_max = 24;
886
887#if !PERL_VERSION_ATLEAST (5,10,0)
888 New(54,PL_retstack,4,OP*);
889 PL_retstack_ix = 0;
890 PL_retstack_max = 4;
891#endif
406} 892}
893#endif
407 894
408/* 895/*
409 * destroy the stacks, the callchain etc... 896 * destroy the stacks, the callchain etc...
410 * still there is a memleak of 128 bytes...
411 */ 897 */
412STATIC void 898static void
413destroy_stacks(pTHX) 899coro_destruct_stacks (pTHX)
414{ 900{
415 /* is this ugly, I ask? */
416 while (PL_scopestack_ix)
417 LEAVE;
418
419 /* sure it is, but more important: is it correct?? :/ */
420 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
421 FREETMPS;
422
423 while (PL_curstackinfo->si_next) 901 while (PL_curstackinfo->si_next)
424 PL_curstackinfo = PL_curstackinfo->si_next; 902 PL_curstackinfo = PL_curstackinfo->si_next;
425 903
426 while (PL_curstackinfo) 904 while (PL_curstackinfo)
427 { 905 {
428 PERL_SI *p = PL_curstackinfo->si_prev; 906 PERL_SI *p = PL_curstackinfo->si_prev;
429 907
430 { 908 if (!IN_DESTRUCT)
431 dSP;
432 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
433 PUTBACK; /* possibly superfluous */
434 }
435
436 dounwind(-1);
437
438 SvREFCNT_dec(PL_curstackinfo->si_stack); 909 SvREFCNT_dec (PL_curstackinfo->si_stack);
910
439 Safefree(PL_curstackinfo->si_cxstack); 911 Safefree (PL_curstackinfo->si_cxstack);
440 Safefree(PL_curstackinfo); 912 Safefree (PL_curstackinfo);
441 PL_curstackinfo = p; 913 PL_curstackinfo = p;
442 } 914 }
443 915
444 Safefree(PL_tmps_stack); 916 Safefree (PL_tmps_stack);
445 Safefree(PL_markstack); 917 Safefree (PL_markstack);
446 Safefree(PL_scopestack); 918 Safefree (PL_scopestack);
447 Safefree(PL_savestack); 919 Safefree (PL_savestack);
920#if !PERL_VERSION_ATLEAST (5,10,0)
448 Safefree(PL_retstack); 921 Safefree (PL_retstack);
922#endif
449} 923}
450 924
451STATIC void 925#define CORO_RSS \
452transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 926 rss += sizeof (SYM (curstackinfo)); \
453{ 927 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
454 dSP; 928 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
929 rss += SYM (tmps_max) * sizeof (SV *); \
930 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
931 rss += SYM (scopestack_max) * sizeof (I32); \
932 rss += SYM (savestack_max) * sizeof (ANY);
455 933
456 if (prev != next) 934static size_t
457 { 935coro_rss (pTHX_ struct coro *coro)
458 /* 936{
459 * this could be done in newprocess which would lead to 937 size_t rss = sizeof (*coro);
460 * extremely elegant and fast (just SAVE/LOAD) 938
461 * code here, but lazy allocation of stacks has also
462 * some virtues and the overhead of the if() is nil.
463 */
464 if (next->mainstack) 939 if (coro->mainstack)
940 {
941 if (coro->flags & CF_RUNNING)
465 { 942 {
466 SAVE (prev, flags); 943 #define SYM(sym) PL_ ## sym
467 LOAD (next); 944 CORO_RSS;
468 /* mark this state as in-use */ 945 #undef SYM
469 next->mainstack = 0;
470 next->tmps_ix = -2;
471 }
472 else if (next->tmps_ix == -2)
473 {
474 croak ("tried to transfer to running coroutine");
475 } 946 }
476 else 947 else
477 { 948 {
949 #define SYM(sym) coro->slot->sym
950 CORO_RSS;
951 #undef SYM
478 /* 952 }
953 }
954
955 return rss;
956}
957
958/** coroutine stack handling ************************************************/
959
960static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
961static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
962static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
963
964/* apparently < 5.8.8 */
965#ifndef MgPV_nolen_const
966#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
967 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
968 (const char*)(mg)->mg_ptr)
969#endif
970
971/*
972 * This overrides the default magic get method of %SIG elements.
973 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
974 * and instead of trying to save and restore the hash elements (extremely slow),
975 * we just provide our own readback here.
976 */
977static int ecb_cold
978coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
979{
980 const char *s = MgPV_nolen_const (mg);
981
982 if (*s == '_')
983 {
984 SV **svp = 0;
985
986 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
987 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
988
989 if (svp)
990 {
991 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
992 return 0;
993 }
994 }
995
996 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
997}
998
999static int ecb_cold
1000coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1001{
1002 const char *s = MgPV_nolen_const (mg);
1003
1004 if (*s == '_')
1005 {
1006 SV **svp = 0;
1007
1008 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1009 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1010
1011 if (svp)
1012 {
1013 SV *old = *svp;
1014 *svp = 0;
1015 SvREFCNT_dec (old);
1016 return 0;
1017 }
1018 }
1019
1020 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1021}
1022
1023static int ecb_cold
1024coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1025{
1026 const char *s = MgPV_nolen_const (mg);
1027
1028 if (*s == '_')
1029 {
1030 SV **svp = 0;
1031
1032 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1033 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1034
1035 if (svp)
1036 {
1037 SV *old = *svp;
1038 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1039 SvREFCNT_dec (old);
1040 return 0;
1041 }
1042 }
1043
1044 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1045}
1046
1047static void
1048prepare_nop (pTHX_ struct coro_transfer_args *ta)
1049{
1050 /* kind of mega-hacky, but works */
1051 ta->next = ta->prev = (struct coro *)ta;
1052}
1053
1054static int
1055slf_check_nop (pTHX_ struct CoroSLF *frame)
1056{
1057 return 0;
1058}
1059
1060static int
1061slf_check_repeat (pTHX_ struct CoroSLF *frame)
1062{
1063 return 1;
1064}
1065
1066static UNOP init_perl_op;
1067
1068ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1069init_perl (pTHX_ struct coro *coro)
1070{
1071 /*
479 * emulate part of the perl startup here. 1072 * emulate part of the perl startup here.
480 */ 1073 */
1074 coro_init_stacks (aTHX);
1075
1076 PL_runops = RUNOPS_DEFAULT;
1077 PL_curcop = &PL_compiling;
1078 PL_in_eval = EVAL_NULL;
1079 PL_comppad = 0;
1080 PL_comppad_name = 0;
1081 PL_comppad_name_fill = 0;
1082 PL_comppad_name_floor = 0;
1083 PL_curpm = 0;
1084 PL_curpad = 0;
1085 PL_localizing = 0;
1086 PL_restartop = 0;
1087#if PERL_VERSION_ATLEAST (5,10,0)
1088 PL_parser = 0;
1089#endif
1090 PL_hints = 0;
1091
1092 /* recreate the die/warn hooks */
1093 PL_diehook = SvREFCNT_inc (rv_diehook);
1094 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1095
1096 GvSV (PL_defgv) = newSV (0);
1097 GvAV (PL_defgv) = coro->args; coro->args = 0;
1098 GvSV (PL_errgv) = newSV (0);
1099 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1100 GvHV (PL_hintgv) = 0;
1101 PL_rs = newSVsv (GvSV (irsgv));
1102 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1103
1104 {
1105 dSP;
481 UNOP myop; 1106 UNOP myop;
482 1107
483 SAVE (prev, -1); /* first get rid of the old state */
484
485 init_stacks (); /* from perl.c */
486 SPAGAIN;
487
488 PL_op = (OP *)&myop;
489 /*PL_curcop = 0;*/
490 SvREFCNT_dec (GvAV (PL_defgv));
491 GvAV (PL_defgv) = next->args;
492
493 Zero(&myop, 1, UNOP); 1108 Zero (&myop, 1, UNOP);
494 myop.op_next = Nullop; 1109 myop.op_next = Nullop;
1110 myop.op_type = OP_ENTERSUB;
495 myop.op_flags = OPf_WANT_VOID; 1111 myop.op_flags = OPf_WANT_VOID;
496 1112
1113 PUSHMARK (SP);
1114 PUSHs ((SV *)coro->startcv);
1115 PUTBACK;
1116 PL_op = (OP *)&myop;
1117 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1118 }
1119
1120 /* this newly created coroutine might be run on an existing cctx which most
1121 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1122 */
1123 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1124 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1125 slf_frame.destroy = 0;
1126
1127 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1128 init_perl_op.op_next = PL_op;
1129 init_perl_op.op_type = OP_ENTERSUB;
1130 init_perl_op.op_ppaddr = pp_slf;
1131 /* no flags etc. required, as an init function won't be called */
1132
1133 PL_op = (OP *)&init_perl_op;
1134
1135 /* copy throw, in case it was set before init_perl */
1136 CORO_THROW = coro->except;
1137
1138 SWAP_SVS (coro);
1139
1140 if (ecb_expect_false (enable_times))
1141 {
1142 coro_times_update ();
1143 coro_times_sub (coro);
1144 }
1145}
1146
1147static void
1148coro_unwind_stacks (pTHX)
1149{
1150 if (!IN_DESTRUCT)
1151 {
1152 /* restore all saved variables and stuff */
1153 LEAVE_SCOPE (0);
1154 assert (PL_tmps_floor == -1);
1155
1156 /* free all temporaries */
1157 FREETMPS;
1158 assert (PL_tmps_ix == -1);
1159
1160 /* unwind all extra stacks */
1161 POPSTACK_TO (PL_mainstack);
1162
1163 /* unwind main stack */
1164 dounwind (-1);
1165 }
1166}
1167
1168static void
1169destroy_perl (pTHX_ struct coro *coro)
1170{
1171 SV *svf [9];
1172
1173 {
1174 SV *old_current = SvRV (coro_current);
1175 struct coro *current = SvSTATE (old_current);
1176
1177 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1178
1179 save_perl (aTHX_ current);
1180
1181 /* this will cause transfer_check to croak on block*/
1182 SvRV_set (coro_current, (SV *)coro->hv);
1183
1184 load_perl (aTHX_ coro);
1185
1186 coro_unwind_stacks (aTHX);
1187
1188 /* restore swapped sv's */
1189 SWAP_SVS (coro);
1190
1191 coro_destruct_stacks (aTHX);
1192
1193 // now save some sv's to be free'd later
1194 svf [0] = GvSV (PL_defgv);
1195 svf [1] = (SV *)GvAV (PL_defgv);
1196 svf [2] = GvSV (PL_errgv);
1197 svf [3] = (SV *)PL_defoutgv;
1198 svf [4] = PL_rs;
1199 svf [5] = GvSV (irsgv);
1200 svf [6] = (SV *)GvHV (PL_hintgv);
1201 svf [7] = PL_diehook;
1202 svf [8] = PL_warnhook;
1203 assert (9 == sizeof (svf) / sizeof (*svf));
1204
1205 SvRV_set (coro_current, old_current);
1206
1207 load_perl (aTHX_ current);
1208 }
1209
1210 {
1211 unsigned int i;
1212
1213 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1214 SvREFCNT_dec (svf [i]);
1215
1216 SvREFCNT_dec (coro->saved_deffh);
1217 SvREFCNT_dec (coro->rouse_cb);
1218 SvREFCNT_dec (coro->invoke_cb);
1219 SvREFCNT_dec (coro->invoke_av);
1220 }
1221}
1222
1223ECB_INLINE void
1224free_coro_mortal (pTHX)
1225{
1226 if (ecb_expect_true (coro_mortal))
1227 {
1228 SvREFCNT_dec ((SV *)coro_mortal);
1229 coro_mortal = 0;
1230 }
1231}
1232
1233static int
1234runops_trace (pTHX)
1235{
1236 COP *oldcop = 0;
1237 int oldcxix = -2;
1238
1239 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1240 {
1241 PERL_ASYNC_CHECK ();
1242
1243 if (cctx_current->flags & CC_TRACE_ALL)
1244 {
1245 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1246 {
1247 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1248 SV **bot, **top;
1249 AV *av = newAV (); /* return values */
1250 SV **cb;
1251 dSP;
1252
1253 GV *gv = CvGV (cx->blk_sub.cv);
1254 SV *fullname = sv_2mortal (newSV (0));
1255 if (isGV (gv))
1256 gv_efullname3 (fullname, gv, 0);
1257
1258 bot = PL_stack_base + cx->blk_oldsp + 1;
1259 top = cx->blk_gimme == G_ARRAY ? SP + 1
1260 : cx->blk_gimme == G_SCALAR ? bot + 1
1261 : bot;
1262
1263 av_extend (av, top - bot);
1264 while (bot < top)
1265 av_push (av, SvREFCNT_inc_NN (*bot++));
1266
1267 PL_runops = RUNOPS_DEFAULT;
1268 ENTER;
1269 SAVETMPS;
1270 EXTEND (SP, 3);
1271 PUSHMARK (SP);
1272 PUSHs (&PL_sv_no);
1273 PUSHs (fullname);
1274 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1275 PUTBACK;
1276 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1277 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1278 SPAGAIN;
1279 FREETMPS;
1280 LEAVE;
1281 PL_runops = runops_trace;
1282 }
1283
1284 if (oldcop != PL_curcop)
1285 {
1286 oldcop = PL_curcop;
1287
1288 if (PL_curcop != &PL_compiling)
1289 {
1290 SV **cb;
1291
1292 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1293 {
1294 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1295
1296 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1297 {
1298 dSP;
1299 GV *gv = CvGV (cx->blk_sub.cv);
1300 SV *fullname = sv_2mortal (newSV (0));
1301
1302 if (isGV (gv))
1303 gv_efullname3 (fullname, gv, 0);
1304
1305 PL_runops = RUNOPS_DEFAULT;
1306 ENTER;
1307 SAVETMPS;
1308 EXTEND (SP, 3);
1309 PUSHMARK (SP);
1310 PUSHs (&PL_sv_yes);
1311 PUSHs (fullname);
1312 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1313 PUTBACK;
1314 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1315 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1316 SPAGAIN;
1317 FREETMPS;
1318 LEAVE;
1319 PL_runops = runops_trace;
1320 }
1321
1322 oldcxix = cxstack_ix;
1323 }
1324
1325 if (cctx_current->flags & CC_TRACE_LINE)
1326 {
1327 dSP;
1328
1329 PL_runops = RUNOPS_DEFAULT;
1330 ENTER;
1331 SAVETMPS;
1332 EXTEND (SP, 3);
1333 PL_runops = RUNOPS_DEFAULT;
1334 PUSHMARK (SP);
1335 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1336 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1337 PUTBACK;
1338 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1339 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1340 SPAGAIN;
1341 FREETMPS;
1342 LEAVE;
1343 PL_runops = runops_trace;
1344 }
1345 }
1346 }
1347 }
1348 }
1349
1350 TAINT_NOT;
1351 return 0;
1352}
1353
1354static struct CoroSLF cctx_ssl_frame;
1355
1356static void
1357slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1358{
1359 ta->prev = 0;
1360}
1361
1362static int
1363slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1364{
1365 *frame = cctx_ssl_frame;
1366
1367 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1368}
1369
1370/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1371static void ecb_noinline
1372cctx_prepare (pTHX)
1373{
1374 PL_top_env = &PL_start_env;
1375
1376 if (cctx_current->flags & CC_TRACE)
1377 PL_runops = runops_trace;
1378
1379 /* we already must be executing an SLF op, there is no other valid way
1380 * that can lead to creation of a new cctx */
1381 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1382 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1383
1384 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1385 cctx_ssl_frame = slf_frame;
1386
1387 slf_frame.prepare = slf_prepare_set_stacklevel;
1388 slf_frame.check = slf_check_set_stacklevel;
1389}
1390
1391/* the tail of transfer: execute stuff we can only do after a transfer */
1392ECB_INLINE void
1393transfer_tail (pTHX)
1394{
1395 free_coro_mortal (aTHX);
1396}
1397
1398/*
1399 * this is a _very_ stripped down perl interpreter ;)
1400 */
1401static void
1402cctx_run (void *arg)
1403{
1404#ifdef USE_ITHREADS
1405# if CORO_PTHREAD
1406 PERL_SET_CONTEXT (coro_thx);
1407# endif
1408#endif
1409 {
1410 dTHX;
1411
1412 /* normally we would need to skip the entersub here */
1413 /* not doing so will re-execute it, which is exactly what we want */
1414 /* PL_nop = PL_nop->op_next */
1415
1416 /* inject a fake subroutine call to cctx_init */
1417 cctx_prepare (aTHX);
1418
1419 /* cctx_run is the alternative tail of transfer() */
1420 transfer_tail (aTHX);
1421
1422 /* somebody or something will hit me for both perl_run and PL_restartop */
1423 PL_restartop = PL_op;
1424 perl_run (PL_curinterp);
1425 /*
1426 * Unfortunately, there is no way to get at the return values of the
1427 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1428 * runtime errors here, as this is just a random interpreter, not a thread.
1429 */
1430
1431 /*
1432 * If perl-run returns we assume exit() was being called or the coro
1433 * fell off the end, which seems to be the only valid (non-bug)
1434 * reason for perl_run to return. We try to exit by jumping to the
1435 * bootstrap-time "top" top_env, as we cannot restore the "main"
1436 * coroutine as Coro has no such concept.
1437 * This actually isn't valid with the pthread backend, but OSes requiring
1438 * that backend are too broken to do it in a standards-compliant way.
1439 */
1440 PL_top_env = main_top_env;
1441 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1442 }
1443}
1444
1445static coro_cctx *
1446cctx_new ()
1447{
1448 coro_cctx *cctx;
1449
1450 ++cctx_count;
1451 New (0, cctx, 1, coro_cctx);
1452
1453 cctx->gen = cctx_gen;
1454 cctx->flags = 0;
1455 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1456
1457 return cctx;
1458}
1459
1460/* create a new cctx only suitable as source */
1461static coro_cctx *
1462cctx_new_empty ()
1463{
1464 coro_cctx *cctx = cctx_new ();
1465
1466 cctx->sptr = 0;
1467 coro_create (&cctx->cctx, 0, 0, 0, 0);
1468
1469 return cctx;
1470}
1471
1472/* create a new cctx suitable as destination/running a perl interpreter */
1473static coro_cctx *
1474cctx_new_run ()
1475{
1476 coro_cctx *cctx = cctx_new ();
1477 void *stack_start;
1478 size_t stack_size;
1479
1480#if HAVE_MMAP
1481 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1482 /* mmap supposedly does allocate-on-write for us */
1483 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1484
1485 if (cctx->sptr != (void *)-1)
1486 {
1487 #if CORO_STACKGUARD
1488 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1489 #endif
1490 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1491 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1492 cctx->flags |= CC_MAPPED;
1493 }
1494 else
1495#endif
1496 {
1497 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1498 New (0, cctx->sptr, cctx_stacksize, long);
1499
1500 if (!cctx->sptr)
1501 {
1502 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1503 _exit (EXIT_FAILURE);
1504 }
1505
1506 stack_start = cctx->sptr;
1507 stack_size = cctx->ssize;
1508 }
1509
1510 #if CORO_USE_VALGRIND
1511 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1512 #endif
1513
1514 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1515
1516 return cctx;
1517}
1518
1519static void
1520cctx_destroy (coro_cctx *cctx)
1521{
1522 if (!cctx)
1523 return;
1524
1525 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1526
1527 --cctx_count;
1528 coro_destroy (&cctx->cctx);
1529
1530 /* coro_transfer creates new, empty cctx's */
1531 if (cctx->sptr)
1532 {
1533 #if CORO_USE_VALGRIND
1534 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1535 #endif
1536
1537#if HAVE_MMAP
1538 if (cctx->flags & CC_MAPPED)
1539 munmap (cctx->sptr, cctx->ssize);
1540 else
1541#endif
1542 Safefree (cctx->sptr);
1543 }
1544
1545 Safefree (cctx);
1546}
1547
1548/* wether this cctx should be destructed */
1549#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1550
1551static coro_cctx *
1552cctx_get (pTHX)
1553{
1554 while (ecb_expect_true (cctx_first))
1555 {
1556 coro_cctx *cctx = cctx_first;
1557 cctx_first = cctx->next;
1558 --cctx_idle;
1559
1560 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1561 return cctx;
1562
1563 cctx_destroy (cctx);
1564 }
1565
1566 return cctx_new_run ();
1567}
1568
1569static void
1570cctx_put (coro_cctx *cctx)
1571{
1572 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1573
1574 /* free another cctx if overlimit */
1575 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1576 {
1577 coro_cctx *first = cctx_first;
1578 cctx_first = first->next;
1579 --cctx_idle;
1580
1581 cctx_destroy (first);
1582 }
1583
1584 ++cctx_idle;
1585 cctx->next = cctx_first;
1586 cctx_first = cctx;
1587}
1588
1589/** coroutine switching *****************************************************/
1590
1591static void
1592transfer_check (pTHX_ struct coro *prev, struct coro *next)
1593{
1594 /* TODO: throwing up here is considered harmful */
1595
1596 if (ecb_expect_true (prev != next))
1597 {
1598 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1599 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1600
1601 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1602 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1603
1604#if !PERL_VERSION_ATLEAST (5,10,0)
1605 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1606 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1607#endif
1608 }
1609}
1610
1611/* always use the TRANSFER macro */
1612static void ecb_noinline /* noinline so we have a fixed stackframe */
1613transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1614{
1615 dSTACKLEVEL;
1616
1617 /* sometimes transfer is only called to set idle_sp */
1618 if (ecb_expect_false (!prev))
1619 {
1620 cctx_current->idle_sp = STACKLEVEL;
1621 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1622 }
1623 else if (ecb_expect_true (prev != next))
1624 {
1625 coro_cctx *cctx_prev;
1626
1627 if (ecb_expect_false (prev->flags & CF_NEW))
1628 {
1629 /* create a new empty/source context */
1630 prev->flags &= ~CF_NEW;
1631 prev->flags |= CF_RUNNING;
1632 }
1633
1634 prev->flags &= ~CF_RUNNING;
1635 next->flags |= CF_RUNNING;
1636
1637 /* first get rid of the old state */
1638 save_perl (aTHX_ prev);
1639
1640 if (ecb_expect_false (next->flags & CF_NEW))
1641 {
1642 /* need to start coroutine */
1643 next->flags &= ~CF_NEW;
1644 /* setup coroutine call */
1645 init_perl (aTHX_ next);
1646 }
1647 else
1648 load_perl (aTHX_ next);
1649
1650 /* possibly untie and reuse the cctx */
1651 if (ecb_expect_true (
1652 cctx_current->idle_sp == STACKLEVEL
1653 && !(cctx_current->flags & CC_TRACE)
1654 && !force_cctx
1655 ))
1656 {
1657 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1658 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1659
1660 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1661 /* without this the next cctx_get might destroy the running cctx while still in use */
1662 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1663 if (ecb_expect_true (!next->cctx))
1664 next->cctx = cctx_get (aTHX);
1665
1666 cctx_put (cctx_current);
1667 }
1668 else
1669 prev->cctx = cctx_current;
1670
1671 ++next->usecount;
1672
1673 cctx_prev = cctx_current;
1674 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1675
1676 next->cctx = 0;
1677
1678 if (ecb_expect_false (cctx_prev != cctx_current))
1679 {
1680 cctx_prev->top_env = PL_top_env;
1681 PL_top_env = cctx_current->top_env;
1682 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1683 }
1684
1685 transfer_tail (aTHX);
1686 }
1687}
1688
1689#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1690#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1691
1692/** high level stuff ********************************************************/
1693
1694/* this function is actually Coro, not Coro::State, but we call it from here */
1695/* because it is convenient - but it hasn't been declared yet for that reason */
1696static void
1697coro_call_on_destroy (pTHX_ struct coro *coro);
1698
1699static void
1700coro_state_destroy (pTHX_ struct coro *coro)
1701{
1702 if (coro->flags & CF_ZOMBIE)
1703 return;
1704
1705 slf_destroy (aTHX_ coro);
1706
1707 coro->flags |= CF_ZOMBIE;
1708
1709 if (coro->flags & CF_READY)
1710 {
1711 /* reduce nready, as destroying a ready coro effectively unreadies it */
1712 /* alternative: look through all ready queues and remove the coro */
1713 --coro_nready;
1714 }
1715 else
1716 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1717
1718 if (coro->next) coro->next->prev = coro->prev;
1719 if (coro->prev) coro->prev->next = coro->next;
1720 if (coro == coro_first) coro_first = coro->next;
1721
1722 if (coro->mainstack
1723 && coro->mainstack != main_mainstack
1724 && coro->slot
1725 && !PL_dirty)
1726 destroy_perl (aTHX_ coro);
1727
1728 cctx_destroy (coro->cctx);
1729 SvREFCNT_dec (coro->startcv);
1730 SvREFCNT_dec (coro->args);
1731 SvREFCNT_dec (coro->swap_sv);
1732 SvREFCNT_dec (CORO_THROW);
1733
1734 coro_call_on_destroy (aTHX_ coro);
1735
1736 /* more destruction mayhem in coro_state_free */
1737}
1738
1739static int
1740coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1741{
1742 struct coro *coro = (struct coro *)mg->mg_ptr;
1743 mg->mg_ptr = 0;
1744
1745 coro_state_destroy (aTHX_ coro);
1746 SvREFCNT_dec (coro->on_destroy);
1747 SvREFCNT_dec (coro->status);
1748
1749 Safefree (coro);
1750
1751 return 0;
1752}
1753
1754static int ecb_cold
1755coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1756{
1757 /* called when perl clones the current process the slow way (windows process emulation) */
1758 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1759 mg->mg_ptr = 0;
1760 mg->mg_virtual = 0;
1761
1762 return 0;
1763}
1764
1765static MGVTBL coro_state_vtbl = {
1766 0, 0, 0, 0,
1767 coro_state_free,
1768 0,
1769#ifdef MGf_DUP
1770 coro_state_dup,
1771#else
1772# define MGf_DUP 0
1773#endif
1774};
1775
1776static void
1777prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1778{
1779 ta->prev = SvSTATE (prev_sv);
1780 ta->next = SvSTATE (next_sv);
1781 TRANSFER_CHECK (*ta);
1782}
1783
1784static void
1785api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1786{
1787 struct coro_transfer_args ta;
1788
1789 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1790 TRANSFER (ta, 1);
1791}
1792
1793/** Coro ********************************************************************/
1794
1795ECB_INLINE void
1796coro_enq (pTHX_ struct coro *coro)
1797{
1798 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1799
1800 SvREFCNT_inc_NN (coro->hv);
1801
1802 coro->next_ready = 0;
1803 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1804 ready [1] = coro;
1805}
1806
1807ECB_INLINE struct coro *
1808coro_deq (pTHX)
1809{
1810 int prio;
1811
1812 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1813 {
1814 struct coro **ready = coro_ready [prio];
1815
1816 if (ready [0])
1817 {
1818 struct coro *coro = ready [0];
1819 ready [0] = coro->next_ready;
1820 return coro;
1821 }
1822 }
1823
1824 return 0;
1825}
1826
1827static void
1828invoke_sv_ready_hook_helper (void)
1829{
1830 dTHX;
1831 dSP;
1832
1833 ENTER;
1834 SAVETMPS;
1835
1836 PUSHMARK (SP);
1837 PUTBACK;
1838 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1839
1840 FREETMPS;
1841 LEAVE;
1842}
1843
1844static int
1845api_ready (pTHX_ SV *coro_sv)
1846{
1847 struct coro *coro = SvSTATE (coro_sv);
1848
1849 if (coro->flags & CF_READY)
1850 return 0;
1851
1852 coro->flags |= CF_READY;
1853
1854 coro_enq (aTHX_ coro);
1855
1856 if (!coro_nready++)
1857 if (coroapi.readyhook)
1858 coroapi.readyhook ();
1859
1860 return 1;
1861}
1862
1863static int
1864api_is_ready (pTHX_ SV *coro_sv)
1865{
1866 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1867}
1868
1869/* expects to own a reference to next->hv */
1870ECB_INLINE void
1871prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1872{
1873 SV *prev_sv = SvRV (coro_current);
1874
1875 ta->prev = SvSTATE_hv (prev_sv);
1876 ta->next = next;
1877
1878 TRANSFER_CHECK (*ta);
1879
1880 SvRV_set (coro_current, (SV *)next->hv);
1881
1882 free_coro_mortal (aTHX);
1883 coro_mortal = prev_sv;
1884}
1885
1886static void
1887prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1888{
1889 for (;;)
1890 {
1891 struct coro *next = coro_deq (aTHX);
1892
1893 if (ecb_expect_true (next))
1894 {
1895 /* cannot transfer to destroyed coros, skip and look for next */
1896 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1897 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1898 else
1899 {
1900 next->flags &= ~CF_READY;
1901 --coro_nready;
1902
1903 prepare_schedule_to (aTHX_ ta, next);
1904 break;
1905 }
1906 }
1907 else
1908 {
1909 /* nothing to schedule: call the idle handler */
1910 if (SvROK (sv_idle)
1911 && SvOBJECT (SvRV (sv_idle)))
1912 {
1913 if (SvRV (sv_idle) == SvRV (coro_current))
1914 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1915
1916 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1917 api_ready (aTHX_ SvRV (sv_idle));
1918 --coro_nready;
1919 }
1920 else
1921 {
1922 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1923 dSP;
1924
1925 ENTER;
1926 SAVETMPS;
1927
1928 PUSHMARK (SP);
1929 PUTBACK;
1930 call_sv (sv_idle, G_VOID | G_DISCARD);
1931
1932 FREETMPS;
1933 LEAVE;
1934 }
1935 }
1936 }
1937}
1938
1939ECB_INLINE void
1940prepare_cede (pTHX_ struct coro_transfer_args *ta)
1941{
1942 api_ready (aTHX_ coro_current);
1943 prepare_schedule (aTHX_ ta);
1944}
1945
1946ECB_INLINE void
1947prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1948{
1949 SV *prev = SvRV (coro_current);
1950
1951 if (coro_nready)
1952 {
1953 prepare_schedule (aTHX_ ta);
1954 api_ready (aTHX_ prev);
1955 }
1956 else
1957 prepare_nop (aTHX_ ta);
1958}
1959
1960static void
1961api_schedule (pTHX)
1962{
1963 struct coro_transfer_args ta;
1964
1965 prepare_schedule (aTHX_ &ta);
1966 TRANSFER (ta, 1);
1967}
1968
1969static void
1970api_schedule_to (pTHX_ SV *coro_sv)
1971{
1972 struct coro_transfer_args ta;
1973 struct coro *next = SvSTATE (coro_sv);
1974
1975 SvREFCNT_inc_NN (coro_sv);
1976 prepare_schedule_to (aTHX_ &ta, next);
1977}
1978
1979static int
1980api_cede (pTHX)
1981{
1982 struct coro_transfer_args ta;
1983
1984 prepare_cede (aTHX_ &ta);
1985
1986 if (ecb_expect_true (ta.prev != ta.next))
1987 {
1988 TRANSFER (ta, 1);
1989 return 1;
1990 }
1991 else
1992 return 0;
1993}
1994
1995static int
1996api_cede_notself (pTHX)
1997{
1998 if (coro_nready)
1999 {
2000 struct coro_transfer_args ta;
2001
2002 prepare_cede_notself (aTHX_ &ta);
2003 TRANSFER (ta, 1);
2004 return 1;
2005 }
2006 else
2007 return 0;
2008}
2009
2010static void
2011api_trace (pTHX_ SV *coro_sv, int flags)
2012{
2013 struct coro *coro = SvSTATE (coro_sv);
2014
2015 if (coro->flags & CF_RUNNING)
2016 croak ("cannot enable tracing on a running coroutine, caught");
2017
2018 if (flags & CC_TRACE)
2019 {
2020 if (!coro->cctx)
2021 coro->cctx = cctx_new_run ();
2022 else if (!(coro->cctx->flags & CC_TRACE))
2023 croak ("cannot enable tracing on coroutine with custom stack, caught");
2024
2025 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2026 }
2027 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2028 {
2029 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2030
2031 if (coro->flags & CF_RUNNING)
2032 PL_runops = RUNOPS_DEFAULT;
2033 else
2034 coro->slot->runops = RUNOPS_DEFAULT;
2035 }
2036}
2037
2038static void
2039coro_push_av (pTHX_ AV *av, I32 gimme_v)
2040{
2041 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2042 {
2043 dSP;
2044
2045 if (gimme_v == G_SCALAR)
2046 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2047 else
2048 {
2049 int i;
2050 EXTEND (SP, AvFILLp (av) + 1);
2051
2052 for (i = 0; i <= AvFILLp (av); ++i)
2053 PUSHs (AvARRAY (av)[i]);
2054 }
2055
2056 PUTBACK;
2057 }
2058}
2059
2060static void
2061coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2062{
2063 if (!coro->on_destroy)
2064 coro->on_destroy = newAV ();
2065
2066 av_push (coro->on_destroy, cb);
2067}
2068
2069static void
2070slf_destroy_join (pTHX_ struct CoroSLF *frame)
2071{
2072 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2073}
2074
2075static int
2076slf_check_join (pTHX_ struct CoroSLF *frame)
2077{
2078 struct coro *coro = (struct coro *)frame->data;
2079
2080 if (!coro->status)
2081 return 1;
2082
2083 frame->destroy = 0;
2084
2085 coro_push_av (aTHX_ coro->status, GIMME_V);
2086
2087 SvREFCNT_dec ((SV *)coro->hv);
2088
2089 return 0;
2090}
2091
2092static void
2093slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2096
2097 if (items > 1)
2098 croak ("join called with too many arguments");
2099
2100 if (coro->status)
2101 frame->prepare = prepare_nop;
2102 else
2103 {
2104 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2105 frame->prepare = prepare_schedule;
2106 }
2107
2108 frame->check = slf_check_join;
2109 frame->destroy = slf_destroy_join;
2110 frame->data = (void *)coro;
2111 SvREFCNT_inc (coro->hv);
2112}
2113
2114static void
2115coro_call_on_destroy (pTHX_ struct coro *coro)
2116{
2117 AV *od = coro->on_destroy;
2118
2119 if (!od)
2120 return;
2121
2122 while (AvFILLp (od) >= 0)
2123 {
2124 SV *cb = sv_2mortal (av_pop (od));
2125
2126 /* coro hv's (and only hv's at the moment) are supported as well */
2127 if (SvSTATEhv_p (aTHX_ cb))
2128 api_ready (aTHX_ cb);
2129 else
2130 {
2131 dSP; /* don't disturb outer sp */
497 PUSHMARK(SP); 2132 PUSHMARK (SP);
498 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); 2133
499 /* 2134 if (coro->status)
500 * the next line is slightly wrong, as PL_op->op_next
501 * is actually being executed so we skip the first op.
502 * that doesn't matter, though, since it is only
503 * pp_nextstate and we never return...
504 * ah yes, and I don't care anyways ;)
505 */ 2135 {
2136 PUTBACK;
2137 coro_push_av (aTHX_ coro->status, G_ARRAY);
2138 SPAGAIN;
2139 }
2140
506 PUTBACK; 2141 PUTBACK;
507 PL_op = pp_entersub(aTHX); 2142 call_sv (cb, G_VOID | G_DISCARD);
508 SPAGAIN;
509
510 ENTER; /* necessary e.g. for dounwind */
511 } 2143 }
512 } 2144 }
513} 2145}
514 2146
2147static void
2148coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2149{
2150 AV *av;
2151
2152 if (coro->status)
2153 {
2154 av = coro->status;
2155 av_clear (av);
2156 }
2157 else
2158 av = coro->status = newAV ();
2159
2160 /* items are actually not so common, so optimise for this case */
2161 if (items)
2162 {
2163 int i;
2164
2165 av_extend (av, items - 1);
2166
2167 for (i = 0; i < items; ++i)
2168 av_push (av, SvREFCNT_inc_NN (arg [i]));
2169 }
2170}
2171
2172static void
2173slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2174{
2175 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2176 api_ready (aTHX_ sv_manager);
2177
2178 frame->prepare = prepare_schedule;
2179 frame->check = slf_check_repeat;
2180
2181 /* as a minor optimisation, we could unwind all stacks here */
2182 /* but that puts extra pressure on pp_slf, and is not worth much */
2183 /*coro_unwind_stacks (aTHX);*/
2184}
2185
2186static void
2187slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2188{
2189 HV *coro_hv = (HV *)SvRV (coro_current);
2190
2191 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2192 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2193}
2194
2195static void
2196slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 HV *coro_hv;
2199 struct coro *coro;
2200
2201 if (items <= 0)
2202 croak ("Coro::cancel called without coro object,");
2203
2204 coro = SvSTATE (arg [0]);
2205 coro_hv = coro->hv;
2206
2207 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2208
2209 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2210 {
2211 /* coro currently busy cancelling something, so just notify it */
2212 coro->slf_frame.data = (void *)coro;
2213
2214 frame->prepare = prepare_nop;
2215 frame->check = slf_check_nop;
2216 }
2217 else if (coro_hv == (HV *)SvRV (coro_current))
2218 {
2219 /* cancelling the current coro is allowed, and equals terminate */
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221 }
2222 else
2223 {
2224 struct coro *self = SvSTATE_current;
2225
2226 /* otherwise we cancel directly, purely for speed reasons
2227 * unfortunately, this requires some magic trickery, as
2228 * somebody else could cancel us, so we have to fight the cancellation.
2229 * this is ugly, and hopefully fully worth the extra speed.
2230 * besides, I can't get the slow-but-safe version working...
2231 */
2232 slf_frame.data = 0;
2233 self->flags |= CF_NOCANCEL;
2234 coro_state_destroy (aTHX_ coro);
2235 self->flags &= ~CF_NOCANCEL;
2236
2237 if (slf_frame.data)
2238 {
2239 /* while we were busy we have been cancelled, so terminate */
2240 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2241 }
2242 else
2243 {
2244 frame->prepare = prepare_nop;
2245 frame->check = slf_check_nop;
2246 }
2247 }
2248}
2249
2250static int
2251slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2252{
2253 frame->prepare = 0;
2254 coro_unwind_stacks (aTHX);
2255
2256 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2257
2258 return 1;
2259}
2260
2261static int
2262safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2263{
2264 if (coro->cctx)
2265 croak ("coro inside C callback, unable to cancel at this time, caught");
2266
2267 if (coro->flags & CF_NEW)
2268 {
2269 coro_set_status (aTHX_ coro, arg, items);
2270 coro_state_destroy (aTHX_ coro);
2271 }
2272 else
2273 {
2274 if (!coro->slf_frame.prepare)
2275 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2276
2277 slf_destroy (aTHX_ coro);
2278
2279 coro_set_status (aTHX_ coro, arg, items);
2280 coro->slf_frame.prepare = prepare_nop;
2281 coro->slf_frame.check = slf_check_safe_cancel;
2282
2283 api_ready (aTHX_ (SV *)coro->hv);
2284 }
2285
2286 return 1;
2287}
2288
2289/*****************************************************************************/
2290/* async pool handler */
2291
2292static int
2293slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2294{
2295 HV *hv = (HV *)SvRV (coro_current);
2296 struct coro *coro = (struct coro *)frame->data;
2297
2298 if (!coro->invoke_cb)
2299 return 1; /* loop till we have invoke */
2300 else
2301 {
2302 hv_store (hv, "desc", sizeof ("desc") - 1,
2303 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2304
2305 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2306
2307 {
2308 dSP;
2309 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2310 PUTBACK;
2311 }
2312
2313 SvREFCNT_dec (GvAV (PL_defgv));
2314 GvAV (PL_defgv) = coro->invoke_av;
2315 coro->invoke_av = 0;
2316
2317 return 0;
2318 }
2319}
2320
2321static void
2322slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv ((SV *)hv);
2326
2327 if (ecb_expect_true (coro->saved_deffh))
2328 {
2329 /* subsequent iteration */
2330 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2331 coro->saved_deffh = 0;
2332
2333 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2334 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2335 {
2336 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2337 return;
2338 }
2339 else
2340 {
2341 av_clear (GvAV (PL_defgv));
2342 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2343
2344 coro->prio = 0;
2345
2346 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2347 api_trace (aTHX_ coro_current, 0);
2348
2349 frame->prepare = prepare_schedule;
2350 av_push (av_async_pool, SvREFCNT_inc (hv));
2351 }
2352 }
2353 else
2354 {
2355 /* first iteration, simply fall through */
2356 frame->prepare = prepare_nop;
2357 }
2358
2359 frame->check = slf_check_pool_handler;
2360 frame->data = (void *)coro;
2361}
2362
2363/*****************************************************************************/
2364/* rouse callback */
2365
2366#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2367
2368static void
2369coro_rouse_callback (pTHX_ CV *cv)
2370{
2371 dXSARGS;
2372 SV *data = (SV *)S_GENSUB_ARG;
2373
2374 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2375 {
2376 /* first call, set args */
2377 SV *coro = SvRV (data);
2378 AV *av = newAV ();
2379
2380 SvRV_set (data, (SV *)av);
2381
2382 /* better take a full copy of the arguments */
2383 while (items--)
2384 av_store (av, items, newSVsv (ST (items)));
2385
2386 api_ready (aTHX_ coro);
2387 SvREFCNT_dec (coro);
2388 }
2389
2390 XSRETURN_EMPTY;
2391}
2392
2393static int
2394slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2395{
2396 SV *data = (SV *)frame->data;
2397
2398 if (CORO_THROW)
2399 return 0;
2400
2401 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2402 return 1;
2403
2404 /* now push all results on the stack */
2405 {
2406 dSP;
2407 AV *av = (AV *)SvRV (data);
2408 int i;
2409
2410 EXTEND (SP, AvFILLp (av) + 1);
2411 for (i = 0; i <= AvFILLp (av); ++i)
2412 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2413
2414 /* we have stolen the elements, so set length to zero and free */
2415 AvFILLp (av) = -1;
2416 av_undef (av);
2417
2418 PUTBACK;
2419 }
2420
2421 return 0;
2422}
2423
2424static void
2425slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2426{
2427 SV *cb;
2428
2429 if (items)
2430 cb = arg [0];
2431 else
2432 {
2433 struct coro *coro = SvSTATE_current;
2434
2435 if (!coro->rouse_cb)
2436 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2437
2438 cb = sv_2mortal (coro->rouse_cb);
2439 coro->rouse_cb = 0;
2440 }
2441
2442 if (!SvROK (cb)
2443 || SvTYPE (SvRV (cb)) != SVt_PVCV
2444 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2445 croak ("Coro::rouse_wait called with illegal callback argument,");
2446
2447 {
2448 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2449 SV *data = (SV *)S_GENSUB_ARG;
2450
2451 frame->data = (void *)data;
2452 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2453 frame->check = slf_check_rouse_wait;
2454 }
2455}
2456
2457static SV *
2458coro_new_rouse_cb (pTHX)
2459{
2460 HV *hv = (HV *)SvRV (coro_current);
2461 struct coro *coro = SvSTATE_hv (hv);
2462 SV *data = newRV_inc ((SV *)hv);
2463 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2464
2465 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2466 SvREFCNT_dec (data); /* magicext increases the refcount */
2467
2468 SvREFCNT_dec (coro->rouse_cb);
2469 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2470
2471 return cb;
2472}
2473
2474/*****************************************************************************/
2475/* schedule-like-function opcode (SLF) */
2476
2477static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2478static const CV *slf_cv;
2479static SV **slf_argv;
2480static int slf_argc, slf_arga; /* count, allocated */
2481static I32 slf_ax; /* top of stack, for restore */
2482
2483/* this restores the stack in the case we patched the entersub, to */
2484/* recreate the stack frame as perl will on following calls */
2485/* since entersub cleared the stack */
2486static OP *
2487pp_restore (pTHX)
2488{
2489 int i;
2490 SV **SP = PL_stack_base + slf_ax;
2491
2492 PUSHMARK (SP);
2493
2494 EXTEND (SP, slf_argc + 1);
2495
2496 for (i = 0; i < slf_argc; ++i)
2497 PUSHs (sv_2mortal (slf_argv [i]));
2498
2499 PUSHs ((SV *)CvGV (slf_cv));
2500
2501 RETURNOP (slf_restore.op_first);
2502}
2503
2504static void
2505slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2506{
2507 SV **arg = (SV **)slf_frame.data;
2508
2509 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2510}
2511
2512static void
2513slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2514{
2515 if (items != 2)
2516 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2517
2518 frame->prepare = slf_prepare_transfer;
2519 frame->check = slf_check_nop;
2520 frame->data = (void *)arg; /* let's hope it will stay valid */
2521}
2522
2523static void
2524slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 frame->prepare = prepare_schedule;
2527 frame->check = slf_check_nop;
2528}
2529
2530static void
2531slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2532{
2533 struct coro *next = (struct coro *)slf_frame.data;
2534
2535 SvREFCNT_inc_NN (next->hv);
2536 prepare_schedule_to (aTHX_ ta, next);
2537}
2538
2539static void
2540slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 if (!items)
2543 croak ("Coro::schedule_to expects a coroutine argument, caught");
2544
2545 frame->data = (void *)SvSTATE (arg [0]);
2546 frame->prepare = slf_prepare_schedule_to;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 api_ready (aTHX_ SvRV (coro_current));
2554
2555 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2556}
2557
2558static void
2559slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2560{
2561 frame->prepare = prepare_cede;
2562 frame->check = slf_check_nop;
2563}
2564
2565static void
2566slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2567{
2568 frame->prepare = prepare_cede_notself;
2569 frame->check = slf_check_nop;
2570}
2571
2572/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2573static void
2574slf_destroy (pTHX_ struct coro *coro)
2575{
2576 /* this callback is reserved for slf functions needing to do cleanup */
2577 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2578 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2579
2580 /*
2581 * The on_destroy above most likely is from an SLF call.
2582 * Since by definition the SLF call will not finish when we destroy
2583 * the coro, we will have to force-finish it here, otherwise
2584 * cleanup functions cannot call SLF functions.
2585 */
2586 coro->slf_frame.prepare = 0;
2587}
2588
2589/*
2590 * these not obviously related functions are all rolled into one
2591 * function to increase chances that they all will call transfer with the same
2592 * stack offset
2593 * SLF stands for "schedule-like-function".
2594 */
2595static OP *
2596pp_slf (pTHX)
2597{
2598 I32 checkmark; /* mark SP to see how many elements check has pushed */
2599
2600 /* set up the slf frame, unless it has already been set-up */
2601 /* the latter happens when a new coro has been started */
2602 /* or when a new cctx was attached to an existing coroutine */
2603 if (ecb_expect_true (!slf_frame.prepare))
2604 {
2605 /* first iteration */
2606 dSP;
2607 SV **arg = PL_stack_base + TOPMARK + 1;
2608 int items = SP - arg; /* args without function object */
2609 SV *gv = *sp;
2610
2611 /* do a quick consistency check on the "function" object, and if it isn't */
2612 /* for us, divert to the real entersub */
2613 if (SvTYPE (gv) != SVt_PVGV
2614 || !GvCV (gv)
2615 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2616 return PL_ppaddr[OP_ENTERSUB](aTHX);
2617
2618 if (!(PL_op->op_flags & OPf_STACKED))
2619 {
2620 /* ampersand-form of call, use @_ instead of stack */
2621 AV *av = GvAV (PL_defgv);
2622 arg = AvARRAY (av);
2623 items = AvFILLp (av) + 1;
2624 }
2625
2626 /* now call the init function, which needs to set up slf_frame */
2627 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2628 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2629
2630 /* pop args */
2631 SP = PL_stack_base + POPMARK;
2632
2633 PUTBACK;
2634 }
2635
2636 /* now that we have a slf_frame, interpret it! */
2637 /* we use a callback system not to make the code needlessly */
2638 /* complicated, but so we can run multiple perl coros from one cctx */
2639
2640 do
2641 {
2642 struct coro_transfer_args ta;
2643
2644 slf_frame.prepare (aTHX_ &ta);
2645 TRANSFER (ta, 0);
2646
2647 checkmark = PL_stack_sp - PL_stack_base;
2648 }
2649 while (slf_frame.check (aTHX_ &slf_frame));
2650
2651 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2652
2653 /* exception handling */
2654 if (ecb_expect_false (CORO_THROW))
2655 {
2656 SV *exception = sv_2mortal (CORO_THROW);
2657
2658 CORO_THROW = 0;
2659 sv_setsv (ERRSV, exception);
2660 croak (0);
2661 }
2662
2663 /* return value handling - mostly like entersub */
2664 /* make sure we put something on the stack in scalar context */
2665 if (GIMME_V == G_SCALAR
2666 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2667 {
2668 dSP;
2669 SV **bot = PL_stack_base + checkmark;
2670
2671 if (sp == bot) /* too few, push undef */
2672 bot [1] = &PL_sv_undef;
2673 else /* too many, take last one */
2674 bot [1] = *sp;
2675
2676 SP = bot + 1;
2677
2678 PUTBACK;
2679 }
2680
2681 return NORMAL;
2682}
2683
2684static void
2685api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2686{
2687 int i;
2688 SV **arg = PL_stack_base + ax;
2689 int items = PL_stack_sp - arg + 1;
2690
2691 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2692
2693 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2694 && PL_op->op_ppaddr != pp_slf)
2695 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2696
2697 CvFLAGS (cv) |= CVf_SLF;
2698 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2699 slf_cv = cv;
2700
2701 /* we patch the op, and then re-run the whole call */
2702 /* we have to put the same argument on the stack for this to work */
2703 /* and this will be done by pp_restore */
2704 slf_restore.op_next = (OP *)&slf_restore;
2705 slf_restore.op_type = OP_CUSTOM;
2706 slf_restore.op_ppaddr = pp_restore;
2707 slf_restore.op_first = PL_op;
2708
2709 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2710
2711 if (PL_op->op_flags & OPf_STACKED)
2712 {
2713 if (items > slf_arga)
2714 {
2715 slf_arga = items;
2716 Safefree (slf_argv);
2717 New (0, slf_argv, slf_arga, SV *);
2718 }
2719
2720 slf_argc = items;
2721
2722 for (i = 0; i < items; ++i)
2723 slf_argv [i] = SvREFCNT_inc (arg [i]);
2724 }
2725 else
2726 slf_argc = 0;
2727
2728 PL_op->op_ppaddr = pp_slf;
2729 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2730
2731 PL_op = (OP *)&slf_restore;
2732}
2733
2734/*****************************************************************************/
2735/* dynamic wind */
2736
2737static void
2738on_enterleave_call (pTHX_ SV *cb)
2739{
2740 dSP;
2741
2742 PUSHSTACK;
2743
2744 PUSHMARK (SP);
2745 PUTBACK;
2746 call_sv (cb, G_VOID | G_DISCARD);
2747 SPAGAIN;
2748
2749 POPSTACK;
2750}
2751
2752static SV *
2753coro_avp_pop_and_free (pTHX_ AV **avp)
2754{
2755 AV *av = *avp;
2756 SV *res = av_pop (av);
2757
2758 if (AvFILLp (av) < 0)
2759 {
2760 *avp = 0;
2761 SvREFCNT_dec (av);
2762 }
2763
2764 return res;
2765}
2766
2767static void
2768coro_pop_on_enter (pTHX_ void *coro)
2769{
2770 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2771 SvREFCNT_dec (cb);
2772}
2773
2774static void
2775coro_pop_on_leave (pTHX_ void *coro)
2776{
2777 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2778 on_enterleave_call (aTHX_ sv_2mortal (cb));
2779}
2780
2781/*****************************************************************************/
2782/* PerlIO::cede */
2783
2784typedef struct
2785{
2786 PerlIOBuf base;
2787 NV next, every;
2788} PerlIOCede;
2789
2790static IV ecb_cold
2791PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2792{
2793 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2794
2795 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2796 self->next = nvtime () + self->every;
2797
2798 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2799}
2800
2801static SV * ecb_cold
2802PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2803{
2804 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2805
2806 return newSVnv (self->every);
2807}
2808
2809static IV
2810PerlIOCede_flush (pTHX_ PerlIO *f)
2811{
2812 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2813 double now = nvtime ();
2814
2815 if (now >= self->next)
2816 {
2817 api_cede (aTHX);
2818 self->next = now + self->every;
2819 }
2820
2821 return PerlIOBuf_flush (aTHX_ f);
2822}
2823
2824static PerlIO_funcs PerlIO_cede =
2825{
2826 sizeof(PerlIO_funcs),
2827 "cede",
2828 sizeof(PerlIOCede),
2829 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2830 PerlIOCede_pushed,
2831 PerlIOBuf_popped,
2832 PerlIOBuf_open,
2833 PerlIOBase_binmode,
2834 PerlIOCede_getarg,
2835 PerlIOBase_fileno,
2836 PerlIOBuf_dup,
2837 PerlIOBuf_read,
2838 PerlIOBuf_unread,
2839 PerlIOBuf_write,
2840 PerlIOBuf_seek,
2841 PerlIOBuf_tell,
2842 PerlIOBuf_close,
2843 PerlIOCede_flush,
2844 PerlIOBuf_fill,
2845 PerlIOBase_eof,
2846 PerlIOBase_error,
2847 PerlIOBase_clearerr,
2848 PerlIOBase_setlinebuf,
2849 PerlIOBuf_get_base,
2850 PerlIOBuf_bufsiz,
2851 PerlIOBuf_get_ptr,
2852 PerlIOBuf_get_cnt,
2853 PerlIOBuf_set_ptrcnt,
2854};
2855
2856/*****************************************************************************/
2857/* Coro::Semaphore & Coro::Signal */
2858
2859static SV *
2860coro_waitarray_new (pTHX_ int count)
2861{
2862 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2863 AV *av = newAV ();
2864 SV **ary;
2865
2866 /* unfortunately, building manually saves memory */
2867 Newx (ary, 2, SV *);
2868 AvALLOC (av) = ary;
2869#if PERL_VERSION_ATLEAST (5,10,0)
2870 AvARRAY (av) = ary;
2871#else
2872 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2873 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2874 SvPVX ((SV *)av) = (char *)ary;
2875#endif
2876 AvMAX (av) = 1;
2877 AvFILLp (av) = 0;
2878 ary [0] = newSViv (count);
2879
2880 return newRV_noinc ((SV *)av);
2881}
2882
2883/* semaphore */
2884
2885static void
2886coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2887{
2888 SV *count_sv = AvARRAY (av)[0];
2889 IV count = SvIVX (count_sv);
2890
2891 count += adjust;
2892 SvIVX (count_sv) = count;
2893
2894 /* now wake up as many waiters as are expected to lock */
2895 while (count > 0 && AvFILLp (av) > 0)
2896 {
2897 SV *cb;
2898
2899 /* swap first two elements so we can shift a waiter */
2900 AvARRAY (av)[0] = AvARRAY (av)[1];
2901 AvARRAY (av)[1] = count_sv;
2902 cb = av_shift (av);
2903
2904 if (SvOBJECT (cb))
2905 {
2906 api_ready (aTHX_ cb);
2907 --count;
2908 }
2909 else if (SvTYPE (cb) == SVt_PVCV)
2910 {
2911 dSP;
2912 PUSHMARK (SP);
2913 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2914 PUTBACK;
2915 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2916 }
2917
2918 SvREFCNT_dec (cb);
2919 }
2920}
2921
2922static void
2923coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2924{
2925 /* call $sem->adjust (0) to possibly wake up some other waiters */
2926 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2927}
2928
2929static int
2930slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2931{
2932 AV *av = (AV *)frame->data;
2933 SV *count_sv = AvARRAY (av)[0];
2934 SV *coro_hv = SvRV (coro_current);
2935
2936 /* if we are about to throw, don't actually acquire the lock, just throw */
2937 if (CORO_THROW)
2938 return 0;
2939 else if (SvIVX (count_sv) > 0)
2940 {
2941 frame->destroy = 0;
2942
2943 if (acquire)
2944 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2945 else
2946 coro_semaphore_adjust (aTHX_ av, 0);
2947
2948 return 0;
2949 }
2950 else
2951 {
2952 int i;
2953 /* if we were woken up but can't down, we look through the whole */
2954 /* waiters list and only add us if we aren't in there already */
2955 /* this avoids some degenerate memory usage cases */
2956 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2957 if (AvARRAY (av)[i] == coro_hv)
2958 return 1;
2959
2960 av_push (av, SvREFCNT_inc (coro_hv));
2961 return 1;
2962 }
2963}
2964
2965static int
2966slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2967{
2968 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2969}
2970
2971static int
2972slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2975}
2976
2977static void
2978slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2979{
2980 AV *av = (AV *)SvRV (arg [0]);
2981
2982 if (SvIVX (AvARRAY (av)[0]) > 0)
2983 {
2984 frame->data = (void *)av;
2985 frame->prepare = prepare_nop;
2986 }
2987 else
2988 {
2989 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2990
2991 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2992 frame->prepare = prepare_schedule;
2993 /* to avoid race conditions when a woken-up coro gets terminated */
2994 /* we arrange for a temporary on_destroy that calls adjust (0) */
2995 frame->destroy = coro_semaphore_destroy;
2996 }
2997}
2998
2999static void
3000slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3001{
3002 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3003 frame->check = slf_check_semaphore_down;
3004}
3005
3006static void
3007slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3008{
3009 if (items >= 2)
3010 {
3011 /* callback form */
3012 AV *av = (AV *)SvRV (arg [0]);
3013 SV *cb_cv = s_get_cv_croak (arg [1]);
3014
3015 av_push (av, SvREFCNT_inc_NN (cb_cv));
3016
3017 if (SvIVX (AvARRAY (av)[0]) > 0)
3018 coro_semaphore_adjust (aTHX_ av, 0);
3019
3020 frame->prepare = prepare_nop;
3021 frame->check = slf_check_nop;
3022 }
3023 else
3024 {
3025 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3026 frame->check = slf_check_semaphore_wait;
3027 }
3028}
3029
3030/* signal */
3031
3032static void
3033coro_signal_wake (pTHX_ AV *av, int count)
3034{
3035 SvIVX (AvARRAY (av)[0]) = 0;
3036
3037 /* now signal count waiters */
3038 while (count > 0 && AvFILLp (av) > 0)
3039 {
3040 SV *cb;
3041
3042 /* swap first two elements so we can shift a waiter */
3043 cb = AvARRAY (av)[0];
3044 AvARRAY (av)[0] = AvARRAY (av)[1];
3045 AvARRAY (av)[1] = cb;
3046
3047 cb = av_shift (av);
3048
3049 if (SvTYPE (cb) == SVt_PVCV)
3050 {
3051 dSP;
3052 PUSHMARK (SP);
3053 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3054 PUTBACK;
3055 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3056 }
3057 else
3058 {
3059 api_ready (aTHX_ cb);
3060 sv_setiv (cb, 0); /* signal waiter */
3061 }
3062
3063 SvREFCNT_dec (cb);
3064
3065 --count;
3066 }
3067}
3068
3069static int
3070slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3071{
3072 /* if we are about to throw, also stop waiting */
3073 return SvROK ((SV *)frame->data) && !CORO_THROW;
3074}
3075
3076static void
3077slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3078{
3079 AV *av = (AV *)SvRV (arg [0]);
3080
3081 if (items >= 2)
3082 {
3083 SV *cb_cv = s_get_cv_croak (arg [1]);
3084 av_push (av, SvREFCNT_inc_NN (cb_cv));
3085
3086 if (SvIVX (AvARRAY (av)[0]))
3087 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3088
3089 frame->prepare = prepare_nop;
3090 frame->check = slf_check_nop;
3091 }
3092 else if (SvIVX (AvARRAY (av)[0]))
3093 {
3094 SvIVX (AvARRAY (av)[0]) = 0;
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else
3099 {
3100 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3101
3102 av_push (av, waiter);
3103
3104 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3105 frame->prepare = prepare_schedule;
3106 frame->check = slf_check_signal_wait;
3107 }
3108}
3109
3110/*****************************************************************************/
3111/* Coro::AIO */
3112
3113#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3114
3115/* helper storage struct */
3116struct io_state
3117{
3118 int errorno;
3119 I32 laststype; /* U16 in 5.10.0 */
3120 int laststatval;
3121 Stat_t statcache;
3122};
3123
3124static void
3125coro_aio_callback (pTHX_ CV *cv)
3126{
3127 dXSARGS;
3128 AV *state = (AV *)S_GENSUB_ARG;
3129 SV *coro = av_pop (state);
3130 SV *data_sv = newSV (sizeof (struct io_state));
3131
3132 av_extend (state, items - 1);
3133
3134 sv_upgrade (data_sv, SVt_PV);
3135 SvCUR_set (data_sv, sizeof (struct io_state));
3136 SvPOK_only (data_sv);
3137
3138 {
3139 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3140
3141 data->errorno = errno;
3142 data->laststype = PL_laststype;
3143 data->laststatval = PL_laststatval;
3144 data->statcache = PL_statcache;
3145 }
3146
3147 /* now build the result vector out of all the parameters and the data_sv */
3148 {
3149 int i;
3150
3151 for (i = 0; i < items; ++i)
3152 av_push (state, SvREFCNT_inc_NN (ST (i)));
3153 }
3154
3155 av_push (state, data_sv);
3156
3157 api_ready (aTHX_ coro);
3158 SvREFCNT_dec (coro);
3159 SvREFCNT_dec ((AV *)state);
3160}
3161
3162static int
3163slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3164{
3165 AV *state = (AV *)frame->data;
3166
3167 /* if we are about to throw, return early */
3168 /* this does not cancel the aio request, but at least */
3169 /* it quickly returns */
3170 if (CORO_THROW)
3171 return 0;
3172
3173 /* one element that is an RV? repeat! */
3174 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3175 return 1;
3176
3177 /* restore status */
3178 {
3179 SV *data_sv = av_pop (state);
3180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3181
3182 errno = data->errorno;
3183 PL_laststype = data->laststype;
3184 PL_laststatval = data->laststatval;
3185 PL_statcache = data->statcache;
3186
3187 SvREFCNT_dec (data_sv);
3188 }
3189
3190 /* push result values */
3191 {
3192 dSP;
3193 int i;
3194
3195 EXTEND (SP, AvFILLp (state) + 1);
3196 for (i = 0; i <= AvFILLp (state); ++i)
3197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3198
3199 PUTBACK;
3200 }
3201
3202 return 0;
3203}
3204
3205static void
3206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3207{
3208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3209 SV *coro_hv = SvRV (coro_current);
3210 struct coro *coro = SvSTATE_hv (coro_hv);
3211
3212 /* put our coroutine id on the state arg */
3213 av_push (state, SvREFCNT_inc_NN (coro_hv));
3214
3215 /* first see whether we have a non-zero priority and set it as AIO prio */
3216 if (coro->prio)
3217 {
3218 dSP;
3219
3220 static SV *prio_cv;
3221 static SV *prio_sv;
3222
3223 if (ecb_expect_false (!prio_cv))
3224 {
3225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3226 prio_sv = newSViv (0);
3227 }
3228
3229 PUSHMARK (SP);
3230 sv_setiv (prio_sv, coro->prio);
3231 XPUSHs (prio_sv);
3232
3233 PUTBACK;
3234 call_sv (prio_cv, G_VOID | G_DISCARD);
3235 }
3236
3237 /* now call the original request */
3238 {
3239 dSP;
3240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3241 int i;
3242
3243 PUSHMARK (SP);
3244
3245 /* first push all args to the stack */
3246 EXTEND (SP, items + 1);
3247
3248 for (i = 0; i < items; ++i)
3249 PUSHs (arg [i]);
3250
3251 /* now push the callback closure */
3252 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3253
3254 /* now call the AIO function - we assume our request is uncancelable */
3255 PUTBACK;
3256 call_sv ((SV *)req, G_VOID | G_DISCARD);
3257 }
3258
3259 /* now that the request is going, we loop till we have a result */
3260 frame->data = (void *)state;
3261 frame->prepare = prepare_schedule;
3262 frame->check = slf_check_aio_req;
3263}
3264
3265static void
3266coro_aio_req_xs (pTHX_ CV *cv)
3267{
3268 dXSARGS;
3269
3270 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3271
3272 XSRETURN_EMPTY;
3273}
3274
3275/*****************************************************************************/
3276
3277#if CORO_CLONE
3278# include "clone.c"
3279#endif
3280
3281/*****************************************************************************/
3282
3283static SV *
3284coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3285{
3286 SV *coro_sv;
3287 struct coro *coro;
3288 MAGIC *mg;
3289 HV *hv;
3290 SV *cb;
3291 int i;
3292
3293 if (argc > 0)
3294 {
3295 cb = s_get_cv_croak (argv [0]);
3296
3297 if (!is_coro)
3298 {
3299 if (CvISXSUB (cb))
3300 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3301
3302 if (!CvROOT (cb))
3303 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3304 }
3305 }
3306
3307 Newz (0, coro, 1, struct coro);
3308 coro->args = newAV ();
3309 coro->flags = CF_NEW;
3310
3311 if (coro_first) coro_first->prev = coro;
3312 coro->next = coro_first;
3313 coro_first = coro;
3314
3315 coro->hv = hv = newHV ();
3316 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3317 mg->mg_flags |= MGf_DUP;
3318 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3319
3320 if (argc > 0)
3321 {
3322 av_extend (coro->args, argc + is_coro - 1);
3323
3324 if (is_coro)
3325 {
3326 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3327 cb = (SV *)cv_coro_run;
3328 }
3329
3330 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3331
3332 for (i = 1; i < argc; i++)
3333 av_push (coro->args, newSVsv (argv [i]));
3334 }
3335
3336 return coro_sv;
3337}
3338
3339#ifndef __cplusplus
3340ecb_cold XS(boot_Coro__State);
3341#endif
3342
3343#if CORO_JIT
3344
3345static void ecb_noinline ecb_cold
3346pushav_3uv (pTHX_ UV a, UV b, UV c)
3347{
3348 dSP;
3349 AV *av = newAV ();
3350
3351 av_store (av, 2, newSVuv (c));
3352 av_store (av, 1, newSVuv (b));
3353 av_store (av, 0, newSVuv (a));
3354
3355 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3356
3357 PUTBACK;
3358}
3359
3360static void ecb_noinline ecb_cold
3361jit_init (pTHX)
3362{
3363 dSP;
3364 SV *load, *save;
3365 char *map_base;
3366 char *load_ptr, *save_ptr;
3367 STRLEN load_len, save_len;
3368 int count;
3369
3370 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3371
3372 PUSHMARK (SP);
3373#define VARx(name,expr,type) pushav_3uv (aTHX_ (UV)&(expr), offsetof (perl_slots, name), sizeof (type));
3374# include "state.h"
3375#undef VARx
3376 count = call_pv ("Coro::State::_jit", G_ARRAY);
3377 SPAGAIN;
3378
3379 save = POPs; save_ptr = SvPVbyte (save, save_len);
3380 load = POPs; load_ptr = SvPVbyte (load, load_len);
3381
3382 map_base = mmap (0, load_len + save_len + 16, PROT_EXEC | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3383
3384 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3385
3386 load_perl_slots = (load_save_perl_slots_type)map_base;
3387 memcpy (map_base, load_ptr, load_len);
3388
3389 map_base += (load_len + 15) & ~15;
3390
3391 save_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, save_ptr, save_len);
3393
3394 PUTBACK;
3395 eval_pv ("undef &Coro::State::_jit", 1);
3396}
3397
3398#endif
3399
515MODULE = Coro::State PACKAGE = Coro::State 3400MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
516 3401
517PROTOTYPES: ENABLE 3402PROTOTYPES: DISABLE
518 3403
519BOOT: 3404BOOT:
520{ /* {} necessary for stoopid perl-5.6.x */ 3405{
3406#ifdef USE_ITHREADS
3407# if CORO_PTHREAD
3408 coro_thx = PERL_GET_CONTEXT;
3409# endif
3410#endif
3411 BOOT_PAGESIZE;
3412
3413 /* perl defines these to check for existance first, but why it doesn't */
3414 /* just create them one at init time is not clear to me, except for */
3415 /* programs trying to delete them, but... */
3416 /* anyway, we declare this as invalid and make sure they are initialised here */
3417 DEFSV;
3418 ERRSV;
3419
3420 cctx_current = cctx_new_empty ();
3421
3422 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3423 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3424
3425 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3426 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3427 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3428
3429 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3430 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3431 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3432
521 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 3433 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
522 3434
523 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3435 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
524 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3436 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
525 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3437 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
526 3438 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
527 if (!padlist_cache)
528 padlist_cache = newHV ();
529 3439
530 main_mainstack = PL_mainstack; 3440 main_mainstack = PL_mainstack;
531} 3441 main_top_env = PL_top_env;
532 3442
533Coro::State 3443 while (main_top_env->je_prev)
534_newprocess(args) 3444 main_top_env = main_top_env->je_prev;
535 SV * args 3445
3446 {
3447 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3448
3449 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3450 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3451
3452 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3453 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3454 }
3455
3456 coroapi.ver = CORO_API_VERSION;
3457 coroapi.rev = CORO_API_REVISION;
3458
3459 coroapi.transfer = api_transfer;
3460
3461 coroapi.sv_state = SvSTATE_;
3462 coroapi.execute_slf = api_execute_slf;
3463 coroapi.prepare_nop = prepare_nop;
3464 coroapi.prepare_schedule = prepare_schedule;
3465 coroapi.prepare_cede = prepare_cede;
3466 coroapi.prepare_cede_notself = prepare_cede_notself;
3467
3468 time_init (aTHX);
3469
3470 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3471#if CORO_JIT
3472 PUTBACK;
3473 jit_init (aTHX);
3474 SPAGAIN;
3475#endif
3476}
3477
3478SV *
3479new (SV *klass, ...)
3480 ALIAS:
3481 Coro::new = 1
3482 CODE:
3483 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3484 OUTPUT:
3485 RETVAL
3486
3487void
3488transfer (...)
3489 PROTOTYPE: $$
3490 CODE:
3491 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3492
3493void
3494_exit (int code)
536 PROTOTYPE: $ 3495 PROTOTYPE: $
3496 CODE:
3497 _exit (code);
3498
3499SV *
3500clone (Coro::State coro)
3501 CODE:
3502{
3503#if CORO_CLONE
3504 struct coro *ncoro = coro_clone (aTHX_ coro);
3505 MAGIC *mg;
3506 /* TODO: too much duplication */
3507 ncoro->hv = newHV ();
3508 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3509 mg->mg_flags |= MGf_DUP;
3510 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3511#else
3512 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3513#endif
3514}
3515 OUTPUT:
3516 RETVAL
3517
3518int
3519cctx_stacksize (int new_stacksize = 0)
3520 PROTOTYPE: ;$
3521 CODE:
3522 RETVAL = cctx_stacksize;
3523 if (new_stacksize)
3524 {
3525 cctx_stacksize = new_stacksize;
3526 ++cctx_gen;
3527 }
3528 OUTPUT:
3529 RETVAL
3530
3531int
3532cctx_max_idle (int max_idle = 0)
3533 PROTOTYPE: ;$
3534 CODE:
3535 RETVAL = cctx_max_idle;
3536 if (max_idle > 1)
3537 cctx_max_idle = max_idle;
3538 OUTPUT:
3539 RETVAL
3540
3541int
3542cctx_count ()
3543 PROTOTYPE:
3544 CODE:
3545 RETVAL = cctx_count;
3546 OUTPUT:
3547 RETVAL
3548
3549int
3550cctx_idle ()
3551 PROTOTYPE:
3552 CODE:
3553 RETVAL = cctx_idle;
3554 OUTPUT:
3555 RETVAL
3556
3557void
3558list ()
3559 PROTOTYPE:
3560 PPCODE:
3561{
3562 struct coro *coro;
3563 for (coro = coro_first; coro; coro = coro->next)
3564 if (coro->hv)
3565 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3566}
3567
3568void
3569call (Coro::State coro, SV *coderef)
3570 ALIAS:
3571 eval = 1
3572 CODE:
3573{
3574 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3575 {
3576 struct coro *current = SvSTATE_current;
3577 struct CoroSLF slf_save;
3578
3579 if (current != coro)
3580 {
3581 PUTBACK;
3582 save_perl (aTHX_ current);
3583 load_perl (aTHX_ coro);
3584 /* the coro is most likely in an active SLF call.
3585 * while not strictly required (the code we execute is
3586 * not allowed to call any SLF functions), it's cleaner
3587 * to reinitialise the slf_frame and restore it later.
3588 * This might one day allow us to actually do SLF calls
3589 * from code executed here.
3590 */
3591 slf_save = slf_frame;
3592 slf_frame.prepare = 0;
3593 SPAGAIN;
3594 }
3595
3596 PUSHSTACK;
3597
3598 PUSHMARK (SP);
3599 PUTBACK;
3600
3601 if (ix)
3602 eval_sv (coderef, 0);
3603 else
3604 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3605
3606 POPSTACK;
3607 SPAGAIN;
3608
3609 if (current != coro)
3610 {
3611 PUTBACK;
3612 slf_frame = slf_save;
3613 save_perl (aTHX_ coro);
3614 load_perl (aTHX_ current);
3615 SPAGAIN;
3616 }
3617 }
3618}
3619
3620SV *
3621is_ready (Coro::State coro)
3622 PROTOTYPE: $
3623 ALIAS:
3624 is_ready = CF_READY
3625 is_running = CF_RUNNING
3626 is_new = CF_NEW
3627 is_destroyed = CF_ZOMBIE
3628 is_zombie = CF_ZOMBIE
3629 is_suspended = CF_SUSPENDED
3630 CODE:
3631 RETVAL = boolSV (coro->flags & ix);
3632 OUTPUT:
3633 RETVAL
3634
3635void
3636throw (Coro::State self, SV *exception = &PL_sv_undef)
3637 PROTOTYPE: $;$
537 CODE: 3638 CODE:
538 Coro__State coro; 3639{
3640 struct coro *current = SvSTATE_current;
3641 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3642 SvREFCNT_dec (*exceptionp);
3643 SvGETMAGIC (exception);
3644 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3645}
539 3646
540 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3647void
541 croak ("Coro::State::_newprocess expects an arrayref"); 3648api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3649 PROTOTYPE: $;$
3650 C_ARGS: aTHX_ coro, flags
3651
3652SV *
3653has_cctx (Coro::State coro)
3654 PROTOTYPE: $
3655 CODE:
3656 /* maybe manage the running flag differently */
3657 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3658 OUTPUT:
3659 RETVAL
3660
3661int
3662is_traced (Coro::State coro)
3663 PROTOTYPE: $
3664 CODE:
3665 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3666 OUTPUT:
3667 RETVAL
3668
3669UV
3670rss (Coro::State coro)
3671 PROTOTYPE: $
3672 ALIAS:
3673 usecount = 1
3674 CODE:
3675 switch (ix)
3676 {
3677 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3678 case 1: RETVAL = coro->usecount; break;
542 3679 }
543 New (0, coro, 1, struct coro); 3680 OUTPUT:
544
545 coro->mainstack = 0; /* actual work is done inside transfer */
546 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
547
548 RETVAL = coro; 3681 RETVAL
3682
3683void
3684force_cctx ()
3685 PROTOTYPE:
3686 CODE:
3687 cctx_current->idle_sp = 0;
3688
3689void
3690swap_defsv (Coro::State self)
3691 PROTOTYPE: $
3692 ALIAS:
3693 swap_defav = 1
3694 CODE:
3695 if (!self->slot)
3696 croak ("cannot swap state with coroutine that has no saved state,");
3697 else
3698 {
3699 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3700 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3701
3702 SV *tmp = *src; *src = *dst; *dst = tmp;
3703 }
3704
3705void
3706cancel (Coro::State self)
3707 CODE:
3708 coro_state_destroy (aTHX_ self);
3709
3710SV *
3711enable_times (int enabled = enable_times)
3712 CODE:
3713{
3714 RETVAL = boolSV (enable_times);
3715
3716 if (enabled != enable_times)
3717 {
3718 enable_times = enabled;
3719
3720 coro_times_update ();
3721 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3722 }
3723}
549 OUTPUT: 3724 OUTPUT:
550 RETVAL 3725 RETVAL
551 3726
552void 3727void
553transfer(prev, next, flags = TRANSFER_SAVE_ALL) 3728times (Coro::State self)
554 Coro::State_or_hashref prev 3729 PPCODE:
555 Coro::State_or_hashref next 3730{
556 int flags 3731 struct coro *current = SvSTATE (coro_current);
557 PROTOTYPE: @ 3732
3733 if (ecb_expect_false (current == self))
3734 {
3735 coro_times_update ();
3736 coro_times_add (SvSTATE (coro_current));
3737 }
3738
3739 EXTEND (SP, 2);
3740 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3741 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3742
3743 if (ecb_expect_false (current == self))
3744 coro_times_sub (SvSTATE (coro_current));
3745}
3746
3747void
3748swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3749 CODE:
3750{
3751 struct coro *current = SvSTATE_current;
3752
3753 if (current == coro)
3754 SWAP_SVS (current);
3755
3756 if (!coro->swap_sv)
3757 coro->swap_sv = newAV ();
3758
3759 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3760 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3761
3762 if (current == coro)
3763 SWAP_SVS (current);
3764}
3765
3766
3767MODULE = Coro::State PACKAGE = Coro
3768
3769BOOT:
3770{
3771 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3772 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3773 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3774 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3775 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3776 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3777 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3778 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3779
3780 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3781 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3782 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3783 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3784
3785 coro_stash = gv_stashpv ("Coro", TRUE);
3786
3787 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3788 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3789 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3790 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3791 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3792 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3793
3794 {
3795 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3796
3797 coroapi.schedule = api_schedule;
3798 coroapi.schedule_to = api_schedule_to;
3799 coroapi.cede = api_cede;
3800 coroapi.cede_notself = api_cede_notself;
3801 coroapi.ready = api_ready;
3802 coroapi.is_ready = api_is_ready;
3803 coroapi.nready = coro_nready;
3804 coroapi.current = coro_current;
3805
3806 /*GCoroAPI = &coroapi;*/
3807 sv_setiv (sv, (IV)&coroapi);
3808 SvREADONLY_on (sv);
3809 }
3810}
3811
3812SV *
3813async (...)
3814 PROTOTYPE: &@
558 CODE: 3815 CODE:
559 3816 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
560 transfer (aTHX_ prev, next, flags); 3817 api_ready (aTHX_ RETVAL);
3818 OUTPUT:
3819 RETVAL
561 3820
562void 3821void
563DESTROY(coro) 3822_destroy (Coro::State coro)
564 Coro::State coro 3823 CODE:
3824 /* used by the manager thread */
3825 coro_state_destroy (aTHX_ coro);
3826
3827void
3828on_destroy (Coro::State coro, SV *cb)
3829 CODE:
3830 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3831
3832void
3833join (...)
3834 CODE:
3835 CORO_EXECUTE_SLF_XS (slf_init_join);
3836
3837void
3838terminate (...)
3839 CODE:
3840 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3841
3842void
3843cancel (...)
3844 CODE:
3845 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3846
3847int
3848safe_cancel (Coro::State self, ...)
3849 C_ARGS: aTHX_ self, &ST (1), items - 1
3850
3851void
3852schedule (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3855
3856void
3857schedule_to (...)
3858 CODE:
3859 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3860
3861void
3862cede_to (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3865
3866void
3867cede (...)
3868 CODE:
3869 CORO_EXECUTE_SLF_XS (slf_init_cede);
3870
3871void
3872cede_notself (...)
3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3875
3876void
3877_set_current (SV *current)
3878 PROTOTYPE: $
3879 CODE:
3880 SvREFCNT_dec (SvRV (coro_current));
3881 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3882
3883void
3884_set_readyhook (SV *hook)
3885 PROTOTYPE: $
565 CODE: 3886 CODE:
566 3887 SvREFCNT_dec (coro_readyhook);
567 if (coro->mainstack && coro->mainstack != main_mainstack) 3888 SvGETMAGIC (hook);
3889 if (SvOK (hook))
3890 {
3891 coro_readyhook = newSVsv (hook);
3892 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3893 }
3894 else
568 { 3895 {
569 struct coro temp; 3896 coro_readyhook = 0;
570 3897 CORO_READYHOOK = 0;
571 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
572 LOAD(aTHX_ coro);
573
574 destroy_stacks ();
575
576 LOAD((&temp)); /* this will get rid of defsv etc.. */
577 } 3898 }
578 3899
579 Safefree (coro); 3900int
3901prio (Coro::State coro, int newprio = 0)
3902 PROTOTYPE: $;$
3903 ALIAS:
3904 nice = 1
3905 CODE:
3906{
3907 RETVAL = coro->prio;
580 3908
581 /* 3909 if (items > 1)
582 * there is one problematic case left (remember _recurse?)
583 * consider the case when we
584 * 3910 {
585 * 1. start a coroutine 3911 if (ix)
586 * 2. inside it descend into some xs functions 3912 newprio = coro->prio - newprio;
587 * 3. xs function calls a callback 3913
588 * 4. callback switches to $main 3914 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
589 * 5. $main ends - we will end inside the xs function 3915 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
590 * 6. xs function returns and perl executes - what? 3916
3917 coro->prio = newprio;
591 * 3918 }
592 * to avoid this case we recurse in this function 3919}
593 * and simply call my_exit(0), skipping other xs functions 3920 OUTPUT:
594 */ 3921 RETVAL
595 3922
596#if 0 3923SV *
3924ready (SV *self)
3925 PROTOTYPE: $
3926 CODE:
3927 RETVAL = boolSV (api_ready (aTHX_ self));
3928 OUTPUT:
3929 RETVAL
3930
3931int
3932nready (...)
3933 PROTOTYPE:
3934 CODE:
3935 RETVAL = coro_nready;
3936 OUTPUT:
3937 RETVAL
3938
597void 3939void
598_recurse() 3940suspend (Coro::State self)
3941 PROTOTYPE: $
599 CODE: 3942 CODE:
600 LEAVE; 3943 self->flags |= CF_SUSPENDED;
601 PL_stack_sp = PL_stack_base + ax - 1;
602 PL_op = PL_op->op_next;
603 CALLRUNOPS(aTHX);
604 printf ("my_exit\n");
605 my_exit (0);
606
607#endif
608 3944
609void 3945void
610flush() 3946resume (Coro::State self)
3947 PROTOTYPE: $
611 CODE: 3948 CODE:
612#ifdef MAY_FLUSH 3949 self->flags &= ~CF_SUSPENDED;
613 flush_padlist_cache ();
614#endif
615
616MODULE = Coro::State PACKAGE = Coro::Cont
617
618# this is dirty (do you hear me?) and should be in it's own .xs
619 3950
620void 3951void
621result(...) 3952_pool_handler (...)
3953 CODE:
3954 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3955
3956void
3957async_pool (SV *cv, ...)
622 PROTOTYPE: @ 3958 PROTOTYPE: &@
3959 PPCODE:
3960{
3961 HV *hv = (HV *)av_pop (av_async_pool);
3962 AV *av = newAV ();
3963 SV *cb = ST (0);
3964 int i;
3965
3966 av_extend (av, items - 2);
3967 for (i = 1; i < items; ++i)
3968 av_push (av, SvREFCNT_inc_NN (ST (i)));
3969
3970 if ((SV *)hv == &PL_sv_undef)
3971 {
3972 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3973 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3974 SvREFCNT_dec (sv);
3975 }
3976
3977 {
3978 struct coro *coro = SvSTATE_hv (hv);
3979
3980 assert (!coro->invoke_cb);
3981 assert (!coro->invoke_av);
3982 coro->invoke_cb = SvREFCNT_inc (cb);
3983 coro->invoke_av = av;
3984 }
3985
3986 api_ready (aTHX_ (SV *)hv);
3987
3988 if (GIMME_V != G_VOID)
3989 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3990 else
3991 SvREFCNT_dec (hv);
3992}
3993
3994SV *
3995rouse_cb ()
3996 PROTOTYPE:
3997 CODE:
3998 RETVAL = coro_new_rouse_cb (aTHX);
3999 OUTPUT:
4000 RETVAL
4001
4002void
4003rouse_wait (...)
4004 PROTOTYPE: ;$
4005 PPCODE:
4006 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4007
4008void
4009on_enter (SV *block)
4010 ALIAS:
4011 on_leave = 1
4012 PROTOTYPE: &
4013 CODE:
4014{
4015 struct coro *coro = SvSTATE_current;
4016 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4017
4018 block = s_get_cv_croak (block);
4019
4020 if (!*avp)
4021 *avp = newAV ();
4022
4023 av_push (*avp, SvREFCNT_inc (block));
4024
4025 if (!ix)
4026 on_enterleave_call (aTHX_ block);
4027
4028 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4029 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4030 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4031}
4032
4033
4034MODULE = Coro::State PACKAGE = PerlIO::cede
4035
4036BOOT:
4037 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4038
4039
4040MODULE = Coro::State PACKAGE = Coro::Semaphore
4041
4042SV *
4043new (SV *klass, SV *count = 0)
4044 CODE:
4045{
4046 int semcnt = 1;
4047
4048 if (count)
4049 {
4050 SvGETMAGIC (count);
4051
4052 if (SvOK (count))
4053 semcnt = SvIV (count);
4054 }
4055
4056 RETVAL = sv_bless (
4057 coro_waitarray_new (aTHX_ semcnt),
4058 GvSTASH (CvGV (cv))
4059 );
4060}
4061 OUTPUT:
4062 RETVAL
4063
4064# helper for Coro::Channel and others
4065SV *
4066_alloc (int count)
4067 CODE:
4068 RETVAL = coro_waitarray_new (aTHX_ count);
4069 OUTPUT:
4070 RETVAL
4071
4072SV *
4073count (SV *self)
4074 CODE:
4075 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4076 OUTPUT:
4077 RETVAL
4078
4079void
4080up (SV *self, int adjust = 1)
4081 ALIAS:
4082 adjust = 1
623 CODE: 4083 CODE:
624 static SV *returnstk; 4084 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
625 SV *sv;
626 AV *defav = GvAV (PL_defgv);
627 struct coro *prev, *next;
628 4085
629 if (!returnstk) 4086void
630 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 4087down (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
631 4090
632 /* set up @_ -- ugly */ 4091void
633 av_clear (defav); 4092wait (...)
634 av_fill (defav, items - 1); 4093 CODE:
635 while (items--) 4094 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
636 av_store (defav, items, SvREFCNT_inc (ST(items)));
637 4095
638 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 4096void
639 sv = av_pop ((AV *)SvRV (returnstk)); 4097try (SV *self)
640 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 4098 PPCODE:
641 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 4099{
642 SvREFCNT_dec (sv); 4100 AV *av = (AV *)SvRV (self);
643 transfer(prev, next, 0); 4101 SV *count_sv = AvARRAY (av)[0];
4102 IV count = SvIVX (count_sv);
644 4103
4104 if (count > 0)
4105 {
4106 --count;
4107 SvIVX (count_sv) = count;
4108 XSRETURN_YES;
4109 }
4110 else
4111 XSRETURN_NO;
4112}
4113
4114void
4115waiters (SV *self)
4116 PPCODE:
4117{
4118 AV *av = (AV *)SvRV (self);
4119 int wcount = AvFILLp (av) + 1 - 1;
4120
4121 if (GIMME_V == G_SCALAR)
4122 XPUSHs (sv_2mortal (newSViv (wcount)));
4123 else
4124 {
4125 int i;
4126 EXTEND (SP, wcount);
4127 for (i = 1; i <= wcount; ++i)
4128 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4129 }
4130}
4131
4132MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4133
4134void
4135_may_delete (SV *sem, int count, int extra_refs)
4136 PPCODE:
4137{
4138 AV *av = (AV *)SvRV (sem);
4139
4140 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4141 && AvFILLp (av) == 0 /* no waiters, just count */
4142 && SvIV (AvARRAY (av)[0]) == count)
4143 XSRETURN_YES;
4144
4145 XSRETURN_NO;
4146}
4147
4148MODULE = Coro::State PACKAGE = Coro::Signal
4149
4150SV *
4151new (SV *klass)
4152 CODE:
4153 RETVAL = sv_bless (
4154 coro_waitarray_new (aTHX_ 0),
4155 GvSTASH (CvGV (cv))
4156 );
4157 OUTPUT:
4158 RETVAL
4159
4160void
4161wait (...)
4162 CODE:
4163 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4164
4165void
4166broadcast (SV *self)
4167 CODE:
4168{
4169 AV *av = (AV *)SvRV (self);
4170 coro_signal_wake (aTHX_ av, AvFILLp (av));
4171}
4172
4173void
4174send (SV *self)
4175 CODE:
4176{
4177 AV *av = (AV *)SvRV (self);
4178
4179 if (AvFILLp (av))
4180 coro_signal_wake (aTHX_ av, 1);
4181 else
4182 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4183}
4184
4185IV
4186awaited (SV *self)
4187 CODE:
4188 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4189 OUTPUT:
4190 RETVAL
4191
4192
4193MODULE = Coro::State PACKAGE = Coro::AnyEvent
4194
4195BOOT:
4196 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4197
4198void
4199_schedule (...)
4200 CODE:
4201{
4202 static int incede;
4203
4204 api_cede_notself (aTHX);
4205
4206 ++incede;
4207 while (coro_nready >= incede && api_cede (aTHX))
4208 ;
4209
4210 sv_setsv (sv_activity, &PL_sv_undef);
4211 if (coro_nready >= incede)
4212 {
4213 PUSHMARK (SP);
4214 PUTBACK;
4215 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4216 }
4217
4218 --incede;
4219}
4220
4221
4222MODULE = Coro::State PACKAGE = Coro::AIO
4223
4224void
4225_register (char *target, char *proto, SV *req)
4226 CODE:
4227{
4228 SV *req_cv = s_get_cv_croak (req);
4229 /* newXSproto doesn't return the CV on 5.8 */
4230 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4231 sv_setpv ((SV *)slf_cv, proto);
4232 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4233}
4234
4235MODULE = Coro::State PACKAGE = Coro::Select
4236
4237void
4238patch_pp_sselect ()
4239 CODE:
4240 if (!coro_old_pp_sselect)
4241 {
4242 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4243 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4244 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4245 }
4246
4247void
4248unpatch_pp_sselect ()
4249 CODE:
4250 if (coro_old_pp_sselect)
4251 {
4252 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4253 coro_old_pp_sselect = 0;
4254 }
4255

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