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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.437 by root, Tue Nov 5 15:13:42 2013 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 /* perl usually disables NDEBUG later */
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
6 17
7#ifdef HAVE_MMAP 18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
8# include <unistd.h> 22#include <stdio.h>
9# include <sys/mman.h> 23#include <errno.h>
10#endif 24#include <assert.h>
11 25
12#define MAY_FLUSH /* increases codesize */ 26#ifndef SVs_PADSTALE
27# define SVs_PADSTALE 0
28#endif
13 29
14/* perl-related */ 30#ifdef PadARRAY
15#define TRANSFER_SAVE_DEFAV 0x00000001 31# define NEWPADAPI 1
16#define TRANSFER_SAVE_DEFSV 0x00000002 32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
17#define TRANSFER_SAVE_ERRSV 0x00000004
18/* c-related */
19#define TRANSFER_SAVE_CCTXT 0x00000008
20#ifdef CORO_LAZY_STACK
21# define TRANSFER_LAZY_STACK 0x00000010
22#else 33#else
23# define TRANSFER_LAZY_STACK 0x00000000 34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
24#endif 38# endif
39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
40# define PadlistMAX(pl) AvFILLp (pl)
41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
42# define PadARRAY AvARRAY
43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
25 46
26#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 47/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
27 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 48/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
49#if PERL_VERSION_ATLEAST(5,19,0)
50# define SVt_BIND SVt_IV
51#endif
28 52
29#define SUB_INIT "Coro::State::initialize" 53#if defined(_WIN32)
30#define UCORO_STATE "_coro_state" 54# undef HAS_GETTIMEOFDAY
55# undef setjmp
56# undef longjmp
57# undef _exit
58# define setjmp _setjmp /* deep magic */
59#else
60# include <inttypes.h> /* most portable stdint.h */
61#endif
31 62
32/* The next macro should delcare a variable stacklevel that contains and approximation 63/* the maximum number of idle cctx that will be pooled */
33 * to the current C stack pointer. It's property is that it changes with each call 64static int cctx_max_idle = 4;
34 * and should be unique. */ 65
66#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
67# define HAS_SCOPESTACK_NAME 1
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
35#define dSTACKLEVEL void *stacklevel = &stacklevel 82# define STACKLEVEL ((void *)&stacklevel)
83#endif
36 84
37#define labs(l) ((l) >= 0 ? (l) : -(l)) 85#define IN_DESTRUCT PL_dirty
38 86
39/* this is actually not only the c stack but also c registers etc... */ 87#include "CoroAPI.h"
88#define GCoroAPI (&coroapi) /* very sneaky */
89
90#ifdef USE_ITHREADS
91# if CORO_PTHREAD
92static void *coro_thx;
93# endif
94#endif
95
96#ifdef __linux
97# include <time.h> /* for timespec */
98# include <syscall.h> /* for SYS_* */
99# ifdef SYS_clock_gettime
100# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
101# define CORO_CLOCK_MONOTONIC 1
102# define CORO_CLOCK_THREAD_CPUTIME_ID 3
103# endif
104#endif
105
106static double (*nvtime)(); /* so why doesn't it take void? */
107static void (*u2time)(pTHX_ UV ret[2]);
108
109/* we hijack an hopefully unused CV flag for our purposes */
110#define CVf_SLF 0x4000
111static OP *pp_slf (pTHX);
112static void slf_destroy (pTHX_ struct coro *coro);
113
114static U32 cctx_gen;
115static size_t cctx_stacksize = CORO_STACKSIZE;
116static struct CoroAPI coroapi;
117static AV *main_mainstack; /* used to differentiate between $main and others */
118static JMPENV *main_top_env;
119static HV *coro_state_stash, *coro_stash;
120static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
121
122static AV *av_destroy; /* destruction queue */
123static SV *sv_manager; /* the manager coro */
124static SV *sv_idle; /* $Coro::idle */
125
126static GV *irsgv; /* $/ */
127static GV *stdoutgv; /* *STDOUT */
128static SV *rv_diehook;
129static SV *rv_warnhook;
130static HV *hv_sig; /* %SIG */
131
132/* async_pool helper stuff */
133static SV *sv_pool_rss;
134static SV *sv_pool_size;
135static SV *sv_async_pool_idle; /* description string */
136static AV *av_async_pool; /* idle pool */
137static SV *sv_Coro; /* class string */
138static CV *cv_pool_handler;
139
140/* Coro::AnyEvent */
141static SV *sv_activity;
142
143/* enable processtime/realtime profiling */
144static char enable_times;
145typedef U32 coro_ts[2];
146static coro_ts time_real, time_cpu;
147static char times_valid;
148
149static struct coro_cctx *cctx_first;
150static int cctx_count, cctx_idle;
151
152enum
153{
154 CC_MAPPED = 0x01,
155 CC_NOREUSE = 0x02, /* throw this away after tracing */
156 CC_TRACE = 0x04,
157 CC_TRACE_SUB = 0x08, /* trace sub calls */
158 CC_TRACE_LINE = 0x10, /* trace each statement */
159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
160};
161
162/* this is a structure representing a c-level coroutine */
40typedef struct { 163typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 164{
42 int usecnt; /* shared by how many coroutines */ 165 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 166
167 /* the stack */
168 struct coro_stack stack;
169
170 /* cpu state */
171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172#ifndef NDEBUG
173 JMPENV *idle_te; /* same as idle_sp, but for top_env */
174#endif
175 JMPENV *top_env;
45 coro_context cctx; 176 coro_context cctx;
46 177
47 void *sptr; 178 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 179#if CORO_USE_VALGRIND
49} coro_stack; 180 int valgrind_id;
181#endif
182 unsigned char flags;
183} coro_cctx;
50 184
51static coro_stack main_stack = { 1, 0, 0 }; 185static coro_cctx *cctx_current; /* the currently running cctx */
52 186
187/*****************************************************************************/
188
189static MGVTBL coro_state_vtbl;
190
191enum
192{
193 CF_RUNNING = 0x0001, /* coroutine is running */
194 CF_READY = 0x0002, /* coroutine is ready */
195 CF_NEW = 0x0004, /* has never been switched to */
196 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
197 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
198 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
199};
200
201/* the structure where most of the perl state is stored, overlaid on the cxstack */
202typedef struct
203{
204 #define VARx(name,expr,type) type name;
205 #include "state.h"
206} perl_slots;
207
208/* how many context stack entries do we need for perl_slots */
209#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
210
211/* this is a structure representing a perl-level coroutine */
53struct coro { 212struct coro
54 /* the optional C context */ 213{
55 coro_stack *stack; 214 /* the C coroutine allocated to this perl coroutine, if any */
56 void *cursp; 215 coro_cctx *cctx;
57 int gencnt;
58 216
59 /* optionally saved, might be zero */ 217 /* ready queue */
60 AV *defav; 218 struct coro *next_ready;
61 SV *defsv;
62 SV *errsv;
63
64 /* saved global state not related to stacks */
65 U8 dowarn;
66 219
67 /* the stacks and related info (callchain etc..) */ 220 /* state data */
68 PERL_SI *curstackinfo; 221 struct CoroSLF slf_frame; /* saved slf frame */
69 AV *curstack;
70 AV *mainstack; 222 AV *mainstack;
71 SV **stack_sp; 223 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV start_env;
94 JMPENV *top_env;
95 224
225 CV *startcv; /* the CV to execute */
96 /* data associated with this coroutine (initial args) */ 226 AV *args; /* data associated with this coroutine (initial args) */
97 AV *args; 227 int flags; /* CF_ flags */
228 HV *hv; /* the perl hash associated with this coro, if any */
229
230 /* statistics */
231 int usecount; /* number of transfers to this coro */
232
233 /* coro process data */
234 int prio;
235 SV *except; /* exception to be thrown */
236 SV *rouse_cb; /* last rouse callback */
237 AV *on_destroy; /* callbacks or coros to notify on destroy */
238 AV *status; /* the exit status list */
239
240 /* async_pool */
241 SV *saved_deffh;
242 SV *invoke_cb;
243 AV *invoke_av;
244
245 /* on_enter/on_leave */
246 AV *on_enter;
247 AV *on_leave;
248
249 /* swap_sv */
250 AV *swap_sv;
251
252 /* times */
253 coro_ts t_cpu, t_real;
254
255 /* linked list */
256 struct coro *next, *prev;
98}; 257};
99 258
100typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
101typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
102 261
103static AV *main_mainstack; /* used to differentiate between $main and others */ 262/* the following variables are effectively part of the perl context */
104static HV *coro_state_stash; 263/* and get copied between struct coro and these variables */
264/* the main reason we don't support windows process emulation */
265static struct CoroSLF slf_frame; /* the current slf frame */
266
267/** Coro ********************************************************************/
268
269#define CORO_PRIO_MAX 3
270#define CORO_PRIO_HIGH 1
271#define CORO_PRIO_NORMAL 0
272#define CORO_PRIO_LOW -1
273#define CORO_PRIO_IDLE -3
274#define CORO_PRIO_MIN -4
275
276/* for Coro.pm */
277static SV *coro_current;
278static SV *coro_readyhook;
279static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
280static CV *cv_coro_run;
281static struct coro *coro_first;
282#define coro_nready coroapi.nready
283
284/** JIT *********************************************************************/
285
286#if CORO_JIT
287 /* APPLE doesn't have mmap though */
288 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
289 #ifndef CORO_JIT_TYPE
290 #if ECB_AMD64 && CORO_JIT_UNIXY
291 #define CORO_JIT_TYPE "amd64-unix"
292 #elif __i386 && CORO_JIT_UNIXY
293 #define CORO_JIT_TYPE "x86-unix"
294 #endif
295 #endif
296#endif
297
298#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
299 #undef CORO_JIT
300#endif
301
302#if CORO_JIT
303 typedef void (*load_save_perl_slots_type)(perl_slots *);
304 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
305#endif
306
307/** Coro::Select ************************************************************/
308
309static OP *(*coro_old_pp_sselect) (pTHX);
105static SV *ucoro_state_sv; 310static SV *coro_select_select;
106static U32 ucoro_state_hash;
107static HV *padlist_cache;
108 311
109/* mostly copied from op.c:cv_clone2 */ 312/* horrible hack, but if it works... */
110STATIC AV * 313static OP *
111clone_padlist (AV *protopadlist) 314coro_pp_sselect (pTHX)
112{ 315{
113 AV *av; 316 dSP;
114 I32 ix; 317 PUSHMARK (SP - 4); /* fake argument list */
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 318 XPUSHs (coro_select_select);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 319 PUTBACK;
117 SV **pname = AvARRAY (protopad_name); 320
118 SV **ppad = AvARRAY (protopad); 321 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
119 I32 fname = AvFILLp (protopad_name); 322 PL_op->op_flags |= OPf_STACKED;
120 I32 fpad = AvFILLp (protopad); 323 PL_op->op_private = 0;
121 AV *newpadlist, *newpad_name, *newpad; 324 return PL_ppaddr [OP_ENTERSUB](aTHX);
325}
326
327/** time stuff **************************************************************/
328
329#ifdef HAS_GETTIMEOFDAY
330
331ecb_inline void
332coro_u2time (pTHX_ UV ret[2])
333{
334 struct timeval tv;
335 gettimeofday (&tv, 0);
336
337 ret [0] = tv.tv_sec;
338 ret [1] = tv.tv_usec;
339}
340
341ecb_inline double
342coro_nvtime (void)
343{
344 struct timeval tv;
345 gettimeofday (&tv, 0);
346
347 return tv.tv_sec + tv.tv_usec * 1e-6;
348}
349
350ecb_inline void
351time_init (pTHX)
352{
353 nvtime = coro_nvtime;
354 u2time = coro_u2time;
355}
356
357#else
358
359ecb_inline void
360time_init (pTHX)
361{
122 SV **npad; 362 SV **svp;
123 363
124 newpad_name = newAV (); 364 require_pv ("Time/HiRes.pm");
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127 365
128 newpad = newAV (); 366 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 367
132 newpadlist = newAV (); 368 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
369 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
370
371 nvtime = INT2PTR (double (*)(), SvIV (*svp));
372
373 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
374 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
375}
376
377#endif
378
379/** lowlevel stuff **********************************************************/
380
381static SV * ecb_noinline
382coro_get_sv (pTHX_ const char *name, int create)
383{
384#if PERL_VERSION_ATLEAST (5,10,0)
385 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
386 get_sv (name, create);
387#endif
388 return get_sv (name, create);
389}
390
391static AV * ecb_noinline
392coro_get_av (pTHX_ const char *name, int create)
393{
394#if PERL_VERSION_ATLEAST (5,10,0)
395 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
396 get_av (name, create);
397#endif
398 return get_av (name, create);
399}
400
401static HV * ecb_noinline
402coro_get_hv (pTHX_ const char *name, int create)
403{
404#if PERL_VERSION_ATLEAST (5,10,0)
405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
406 get_hv (name, create);
407#endif
408 return get_hv (name, create);
409}
410
411ecb_inline void
412coro_times_update (void)
413{
414#ifdef coro_clock_gettime
415 struct timespec ts;
416
417 ts.tv_sec = ts.tv_nsec = 0;
418 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
419 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
420
421 ts.tv_sec = ts.tv_nsec = 0;
422 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
423 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
424#else
425 dTHX;
426 UV tv[2];
427
428 u2time (aTHX_ tv);
429 time_real [0] = tv [0];
430 time_real [1] = tv [1] * 1000;
431#endif
432}
433
434ecb_inline void
435coro_times_add (struct coro *c)
436{
437 c->t_real [1] += time_real [1];
438 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
439 c->t_real [0] += time_real [0];
440
441 c->t_cpu [1] += time_cpu [1];
442 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
443 c->t_cpu [0] += time_cpu [0];
444}
445
446ecb_inline void
447coro_times_sub (struct coro *c)
448{
449 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
450 c->t_real [1] -= time_real [1];
451 c->t_real [0] -= time_real [0];
452
453 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
454 c->t_cpu [1] -= time_cpu [1];
455 c->t_cpu [0] -= time_cpu [0];
456}
457
458/*****************************************************************************/
459/* magic glue */
460
461#define CORO_MAGIC_type_cv 26
462#define CORO_MAGIC_type_state PERL_MAGIC_ext
463
464#define CORO_MAGIC_NN(sv, type) \
465 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
466 ? SvMAGIC (sv) \
467 : mg_find (sv, type))
468
469#define CORO_MAGIC(sv, type) \
470 (ecb_expect_true (SvMAGIC (sv)) \
471 ? CORO_MAGIC_NN (sv, type) \
472 : 0)
473
474#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
475#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
476
477ecb_inline MAGIC *
478SvSTATEhv_p (pTHX_ SV *coro)
479{
480 MAGIC *mg;
481
482 if (ecb_expect_true (
483 SvTYPE (coro) == SVt_PVHV
484 && (mg = CORO_MAGIC_state (coro))
485 && mg->mg_virtual == &coro_state_vtbl
486 ))
487 return mg;
488
489 return 0;
490}
491
492ecb_inline struct coro *
493SvSTATE_ (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (SvROK (coro))
498 coro = SvRV (coro);
499
500 mg = SvSTATEhv_p (aTHX_ coro);
501 if (!mg)
502 croak ("Coro::State object required");
503
504 return (struct coro *)mg->mg_ptr;
505}
506
507#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
508
509/* faster than SvSTATE, but expects a coroutine hv */
510#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
511#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
512
513/*****************************************************************************/
514/* padlist management and caching */
515
516ecb_inline PADLIST *
517coro_derive_padlist (pTHX_ CV *cv)
518{
519 PADLIST *padlist = CvPADLIST (cv);
520 PADLIST *newpadlist;
521 PAD *newpad;
522 PADOFFSET off = PadlistMAX (padlist) + 1;
523
524#if NEWPADAPI
525
526 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
527 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
528 while (!PadlistARRAY (padlist)[off - 1])
529 --off;
530
531 Perl_pad_push (aTHX_ padlist, off);
532
533 newpad = PadlistARRAY (padlist)[off];
534 PadlistARRAY (padlist)[off] = 0;
535
536#else
537
538#if PERL_VERSION_ATLEAST (5,10,0)
539 Perl_pad_push (aTHX_ padlist, off);
540#else
541 Perl_pad_push (aTHX_ padlist, off, 1);
542#endif
543
544 newpad = PadlistARRAY (padlist)[off];
545 PadlistMAX (padlist) = off - 1;
546
547#endif
548
549 newPADLIST (newpadlist);
550#if !PERL_VERSION_ATLEAST(5,15,3)
551 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
133 AvREAL_off (newpadlist); 552 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 553#endif
135 av_store (newpadlist, 1, (SV *) newpad);
136 554
137 av = newAV (); /* will be @_ */ 555 /* Already extended to 2 elements by newPADLIST. */
138 av_extend (av, 0); 556 PadlistMAX (newpadlist) = 1;
139 av_store (newpad, 0, (SV *) av); 557 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
140 AvFLAGS (av) = AVf_REIFY; 558 PadlistARRAY (newpadlist)[1] = newpad;
141 559
142 for (ix = fpad; ix > 0; ix--) 560 return newpadlist;
561}
562
563ecb_inline void
564free_padlist (pTHX_ PADLIST *padlist)
565{
566 /* may be during global destruction */
567 if (!IN_DESTRUCT)
143 { 568 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 569 I32 i = PadlistMAX (padlist);
145 if (namesv && namesv != &PL_sv_undef) 570
571 while (i > 0) /* special-case index 0 */
146 { 572 {
147 char *name = SvPVX (namesv); /* XXX */ 573 /* we try to be extra-careful here */
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 574 PAD *pad = PadlistARRAY (padlist)[i--];
149 { /* lexical from outside? */ 575 I32 j = PadMAX (pad);
150 npad[ix] = SvREFCNT_inc (ppad[ix]); 576
151 } 577 while (j >= 0)
152 else 578 SvREFCNT_dec (PadARRAY (pad)[j--]);
153 { /* our own lexical */ 579
154 SV *sv; 580 PadMAX (pad) = -1;
155 if (*name == '&') 581 SvREFCNT_dec (pad);
156 sv = SvREFCNT_inc (ppad[ix]);
157 else if (*name == '@')
158 sv = (SV *) newAV ();
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 }
167 } 582 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179 583
180#if 0 /* return -ENOTUNDERSTOOD */ 584 SvREFCNT_dec (PadlistNAMES (padlist));
181 /* Now that vars are all in place, clone nested closures. */
182 585
183 for (ix = fpad; ix > 0; ix--) { 586#if NEWPADAPI
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 587 Safefree (PadlistARRAY (padlist));
185 if (namesv 588 Safefree (padlist);
186 && namesv != &PL_sv_undef 589#else
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC AV *
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist); 590 AvFILLp (padlist) = -1;
211 while (i >= 0) 591 AvREAL_off (padlist);
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist); 592 SvREFCNT_dec ((SV*)padlist);
593#endif
594 }
595}
596
597static int
598coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
599{
600 PADLIST *padlist;
601 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
602 size_t len = *(size_t *)mg->mg_ptr;
603
604 /* perl manages to free our internal AV and _then_ call us */
605 if (IN_DESTRUCT)
606 return 0;
607
608 while (len--)
609 free_padlist (aTHX_ padlists[len]);
610
611 return 0;
612}
613
614static MGVTBL coro_cv_vtbl = {
615 0, 0, 0, 0,
616 coro_cv_free
617};
618
619/* the next two functions merely cache the padlists */
620ecb_inline void
621get_padlist (pTHX_ CV *cv)
622{
623 MAGIC *mg = CORO_MAGIC_cv (cv);
624 size_t *lenp;
625
626 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
627 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
628 else
629 {
630#if CORO_PREFER_PERL_FUNCTIONS
631 /* this is probably cleaner? but also slower! */
632 /* in practise, it seems to be less stable */
633 CV *cp = Perl_cv_clone (aTHX_ cv);
634 CvPADLIST (cv) = CvPADLIST (cp);
635 CvPADLIST (cp) = 0;
636 SvREFCNT_dec (cp);
637#else
638 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
639#endif
640 }
641}
642
643ecb_inline void
644put_padlist (pTHX_ CV *cv)
645{
646 MAGIC *mg = CORO_MAGIC_cv (cv);
647
648 if (ecb_expect_false (!mg))
649 {
650 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
651 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
652 mg->mg_len = 1; /* so mg_free frees mg_ptr */
653 }
654 else
655 Renew (mg->mg_ptr,
656 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
657 char);
658
659 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
660}
661
662/** load & save, init *******************************************************/
663
664ecb_inline void
665swap_sv (SV *a, SV *b)
666{
667 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
668 SV tmp;
669
670 /* swap sv_any */
671 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
672
673 /* swap sv_flags */
674 SvFLAGS (&tmp) = SvFLAGS (a);
675 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
676 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
677
678#if PERL_VERSION_ATLEAST (5,10,0)
679 /* perl 5.10 and later complicates this _quite_ a bit, but it also
680 * is much faster, so no quarrels here. alternatively, we could
681 * sv_upgrade to avoid this.
682 */
683 {
684 /* swap sv_u */
685 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
686
687 /* if SvANY points to the head, we need to adjust the pointers,
688 * as the pointer for a still points to b, and maybe vice versa.
689 */
690 #define svany_in_head(type) \
691 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
692
693 if (svany_in_head (SvTYPE (a)))
694 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
695
696 if (svany_in_head (SvTYPE (b)))
697 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
220 } 698 }
221}
222#endif 699#endif
223
224/* the next two functions merely cache the padlists */
225STATIC void
226get_padlist (CV *cv)
227{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230 if (he && AvFILLp ((AV *)*he) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234} 700}
235 701
236STATIC void 702/* swap sv heads, at least logically */
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 {
243 SvREFCNT_dec (*he);
244 *he = (SV *)newAV ();
245 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248}
249
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
280#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void 703static void
704swap_svs (pTHX_ Coro__State c)
705{
706 int i;
707
708 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
709 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
710}
711
712#define SWAP_SVS(coro) \
713 if (ecb_expect_false ((coro)->swap_sv)) \
714 swap_svs (aTHX_ (coro))
715
716static void
717on_enterleave_call (pTHX_ SV *cb);
718
719static void
285load_state(pTHX_ Coro__State c) 720load_perl (pTHX_ Coro__State c)
286{ 721{
287 PL_dowarn = c->dowarn; 722 perl_slots *slot = c->slot;
723 c->slot = 0;
288 724
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 725 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_start_env = c->start_env;
315 PL_top_env = c->top_env;
316 726
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 727#if CORO_JIT
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 728 load_perl_slots (slot);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 729#else
730 #define VARx(name,expr,type) expr = slot->name;
731 #include "state.h"
732#endif
320 733
321 { 734 {
322 dSP; 735 dSP;
736
323 CV *cv; 737 CV *cv;
324 738
325 /* now do the ugly restore mess */ 739 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 740 while (ecb_expect_true (cv = (CV *)POPs))
327 { 741 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 742 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 743 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 744 CvPADLIST (cv) = (PADLIST *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 745 }
341 746
342 PUTBACK; 747 PUTBACK;
343 } 748 }
344}
345 749
750 slf_frame = c->slf_frame;
751 CORO_THROW = c->except;
752
753 if (ecb_expect_false (enable_times))
754 {
755 if (ecb_expect_false (!times_valid))
756 coro_times_update ();
757
758 coro_times_sub (c);
759 }
760
761 if (ecb_expect_false (c->on_enter))
762 {
763 int i;
764
765 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
766 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
767 }
768
769 SWAP_SVS (c);
770}
771
346static void 772static void
347save_state(pTHX_ Coro__State c, int flags) 773save_perl (pTHX_ Coro__State c)
348{ 774{
775 SWAP_SVS (c);
776
777 if (ecb_expect_false (c->on_leave))
778 {
779 int i;
780
781 for (i = AvFILLp (c->on_leave); i >= 0; --i)
782 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
783 }
784
785 times_valid = 0;
786
787 if (ecb_expect_false (enable_times))
788 {
789 coro_times_update (); times_valid = 1;
790 coro_times_add (c);
791 }
792
793 c->except = CORO_THROW;
794 c->slf_frame = slf_frame;
795
349 { 796 {
350 dSP; 797 dSP;
351 I32 cxix = cxstack_ix; 798 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 799 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 800 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 802 /*
356 * the worst thing you can imagine happens first - we have to save 803 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 804 * (and reinitialize) all cv's in the whole callchain :(
358 */ 805 */
359 806
360 PUSHs (Nullsv); 807 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 808 /* this loop was inspired by pp_caller */
362 for (;;) 809 for (;;)
363 { 810 {
364 do 811 while (ecb_expect_true (cxix >= 0))
365 { 812 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 813 PERL_CONTEXT *cx = &ccstk[cxix--];
367 814
368 if (CxTYPE(cx) == CXt_SUB) 815 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
369 { 816 {
370 CV *cv = cx->blk_sub.cv; 817 CV *cv = cx->blk_sub.cv;
818
371 if (CvDEPTH(cv)) 819 if (ecb_expect_true (CvDEPTH (cv)))
372 { 820 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 821 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 822 PUSHs ((SV *)CvPADLIST (cv));
823 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 824 PUSHs ((SV *)cv);
389 825
390 get_padlist (cv); /* this is a monster */ 826 CvDEPTH (cv) = 0;
827 get_padlist (aTHX_ cv);
391 } 828 }
392 } 829 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 830 }
400 while (cxix >= 0);
401 831
402 if (top_si->si_type == PERLSI_MAIN) 832 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
403 break; 833 break;
404 834
405 top_si = top_si->si_prev; 835 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 836 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 837 cxix = top_si->si_cxix;
408 } 838 }
409 839
410 PUTBACK; 840 PUTBACK;
411 } 841 }
412 842
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 843 /* allocate some space on the context stack for our purposes */
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 844 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 845 {
846 unsigned int i;
416 847
417 /* I have not the slightest idea of why av_reify is necessary */ 848 for (i = 0; i < SLOT_COUNT; ++i)
418 /* but if it's missing the defav contents magically get replaced sometimes */ 849 CXINC;
419 if (c->defav)
420 av_reify (c->defav);
421 850
422 c->dowarn = PL_dowarn; 851 cxstack_ix -= SLOT_COUNT; /* undo allocation */
852 }
423 853
424 c->curstackinfo = PL_curstackinfo;
425 c->curstack = PL_curstack;
426 c->mainstack = PL_mainstack; 854 c->mainstack = PL_mainstack;
427 c->stack_sp = PL_stack_sp; 855
428 c->op = PL_op; 856 {
429 c->curpad = PL_curpad; 857 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
430 c->stack_base = PL_stack_base; 858
431 c->stack_max = PL_stack_max; 859#if CORO_JIT
432 c->tmps_stack = PL_tmps_stack; 860 save_perl_slots (slot);
433 c->tmps_floor = PL_tmps_floor; 861#else
434 c->tmps_ix = PL_tmps_ix; 862 #define VARx(name,expr,type) slot->name = expr;
435 c->tmps_max = PL_tmps_max; 863 #include "state.h"
436 c->markstack = PL_markstack; 864#endif
437 c->markstack_ptr = PL_markstack_ptr; 865 }
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->start_env = PL_start_env;
450 c->top_env = PL_top_env;
451} 866}
452 867
453/* 868/*
454 * allocate various perl stacks. This is an exact copy 869 * allocate various perl stacks. This is almost an exact copy
455 * of perl.c:init_stacks, except that it uses less memory 870 * of perl.c:init_stacks, except that it uses less memory
456 * on the assumption that coroutines do not usually need 871 * on the (sometimes correct) assumption that coroutines do
457 * a lot of stackspace. 872 * not usually need a lot of stackspace.
458 */ 873 */
459STATIC void 874#if CORO_PREFER_PERL_FUNCTIONS
875# define coro_init_stacks(thx) init_stacks ()
876#else
877static void
460coro_init_stacks (pTHX) 878coro_init_stacks (pTHX)
461{ 879{
462 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 880 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
463 PL_curstackinfo->si_type = PERLSI_MAIN; 881 PL_curstackinfo->si_type = PERLSI_MAIN;
464 PL_curstack = PL_curstackinfo->si_stack; 882 PL_curstack = PL_curstackinfo->si_stack;
465 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 883 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466 884
467 PL_stack_base = AvARRAY(PL_curstack); 885 PL_stack_base = AvARRAY(PL_curstack);
468 PL_stack_sp = PL_stack_base; 886 PL_stack_sp = PL_stack_base;
469 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 887 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470 888
471 New(50,PL_tmps_stack,96,SV*); 889 New(50,PL_tmps_stack,32,SV*);
472 PL_tmps_floor = -1; 890 PL_tmps_floor = -1;
473 PL_tmps_ix = -1; 891 PL_tmps_ix = -1;
474 PL_tmps_max = 96; 892 PL_tmps_max = 32;
475 893
476 New(54,PL_markstack,16,I32); 894 New(54,PL_markstack,16,I32);
477 PL_markstack_ptr = PL_markstack; 895 PL_markstack_ptr = PL_markstack;
478 PL_markstack_max = PL_markstack + 16; 896 PL_markstack_max = PL_markstack + 16;
479 897
898#ifdef SET_MARK_OFFSET
480 SET_MARK_OFFSET; 899 SET_MARK_OFFSET;
900#endif
481 901
482 New(54,PL_scopestack,16,I32); 902 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 903 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 904 PL_scopestack_max = 8;
905#if HAS_SCOPESTACK_NAME
906 New(54,PL_scopestack_name,8,const char*);
907#endif
485 908
486 New(54,PL_savestack,96,ANY); 909 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 910 PL_savestack_ix = 0;
488 PL_savestack_max = 96; 911 PL_savestack_max = 24;
489 912
913#if !PERL_VERSION_ATLEAST (5,10,0)
490 New(54,PL_retstack,8,OP*); 914 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 915 PL_retstack_ix = 0;
492 PL_retstack_max = 8; 916 PL_retstack_max = 4;
917#endif
493} 918}
919#endif
494 920
495/* 921/*
496 * destroy the stacks, the callchain etc... 922 * destroy the stacks, the callchain etc...
497 * still there is a memleak of 128 bytes...
498 */ 923 */
499STATIC void 924static void
500destroy_stacks(pTHX) 925coro_destruct_stacks (pTHX)
501{ 926{
502 /* is this ugly, I ask? */
503 while (PL_scopestack_ix)
504 LEAVE;
505
506 /* sure it is, but more important: is it correct?? :/ */
507 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508 FREETMPS;
509
510 while (PL_curstackinfo->si_next) 927 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 928 PL_curstackinfo = PL_curstackinfo->si_next;
512 929
513 while (PL_curstackinfo) 930 while (PL_curstackinfo)
514 { 931 {
515 PERL_SI *p = PL_curstackinfo->si_prev; 932 PERL_SI *p = PL_curstackinfo->si_prev;
516 933
517 { 934 if (!IN_DESTRUCT)
518 dSP;
519 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520 PUTBACK; /* possibly superfluous */
521 }
522
523 dounwind(-1);
524
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 935 SvREFCNT_dec (PL_curstackinfo->si_stack);
936
526 Safefree(PL_curstackinfo->si_cxstack); 937 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 938 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 939 PL_curstackinfo = p;
529 } 940 }
530 941
531 Safefree(PL_tmps_stack); 942 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 943 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 944 Safefree (PL_scopestack);
945#if HAS_SCOPESTACK_NAME
946 Safefree (PL_scopestack_name);
947#endif
534 Safefree(PL_savestack); 948 Safefree (PL_savestack);
949#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree(PL_retstack); 950 Safefree (PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#ifdef HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif 951#endif
952}
953
954#define CORO_RSS \
955 rss += sizeof (SYM (curstackinfo)); \
956 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
957 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
958 rss += SYM (tmps_max) * sizeof (SV *); \
959 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
960 rss += SYM (scopestack_max) * sizeof (I32); \
961 rss += SYM (savestack_max) * sizeof (ANY);
962
963static size_t
964coro_rss (pTHX_ struct coro *coro)
965{
966 size_t rss = sizeof (*coro);
967
968 if (coro->mainstack)
969 {
970 if (coro->flags & CF_RUNNING)
555 { 971 {
556 /*FIXME*//*D*//* reasonable stack size! */ 972 #define SYM(sym) PL_ ## sym
557 stack->ssize = -4096 * sizeof (long); 973 CORO_RSS;
558 New (0, stack->sptr, 4096, long); 974 #undef SYM
559 } 975 }
560 }
561 else 976 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 { 977 {
578#ifdef HAVE_MMAP 978 #define SYM(sym) coro->slot->sym
579 if (stack->ssize > 0 && stack->sptr) 979 CORO_RSS;
580 munmap (stack->sptr, stack->ssize); 980 #undef SYM
981 }
982 }
983
984 return rss;
985}
986
987/** coroutine stack handling ************************************************/
988
989static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
990static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
991static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
992
993/* apparently < 5.8.8 */
994#ifndef MgPV_nolen_const
995#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
996 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
997 (const char*)(mg)->mg_ptr)
998#endif
999
1000/*
1001 * This overrides the default magic get method of %SIG elements.
1002 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1003 * and instead of trying to save and restore the hash elements (extremely slow),
1004 * we just provide our own readback here.
1005 */
1006static int ecb_cold
1007coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1008{
1009 const char *s = MgPV_nolen_const (mg);
1010
1011 if (*s == '_')
1012 {
1013 SV **svp = 0;
1014
1015 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1016 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1017
1018 if (svp)
1019 {
1020 SV *ssv;
1021
1022 if (!*svp)
1023 ssv = &PL_sv_undef;
1024 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1025 ssv = sv_2mortal (newRV_inc (*svp));
581 else 1026 else
582#else 1027 ssv = *svp;
583 Safefree (stack->sptr); 1028
584#endif 1029 sv_setsv (sv, ssv);
585 Safefree (stack); 1030 return 0;
586 } 1031 }
587 else if (ctx->gencnt == stack->gencnt) 1032 }
588 --stack->usecnt; 1033
1034 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1035}
1036
1037static int ecb_cold
1038coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1039{
1040 const char *s = MgPV_nolen_const (mg);
1041
1042 if (*s == '_')
589 } 1043 {
590} 1044 SV **svp = 0;
591 1045
1046 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1047 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1048
1049 if (svp)
1050 {
1051 SV *old = *svp;
1052 *svp = 0;
1053 SvREFCNT_dec (old);
1054 return 0;
1055 }
1056 }
1057
1058 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1059}
1060
1061static int ecb_cold
1062coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1063{
1064 const char *s = MgPV_nolen_const (mg);
1065
1066 if (*s == '_')
1067 {
1068 SV **svp = 0;
1069
1070 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1071 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1072
1073 if (svp)
1074 {
1075 SV *old = *svp;
1076 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1077 SvREFCNT_dec (old);
1078 return 0;
1079 }
1080 }
1081
1082 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1083}
1084
1085static void
1086prepare_nop (pTHX_ struct coro_transfer_args *ta)
1087{
1088 /* kind of mega-hacky, but works */
1089 ta->next = ta->prev = (struct coro *)ta;
1090}
1091
592static void 1092static int
593setup_coro (void *arg) 1093slf_check_nop (pTHX_ struct CoroSLF *frame)
1094{
1095 return 0;
1096}
1097
1098static int
1099slf_check_repeat (pTHX_ struct CoroSLF *frame)
1100{
1101 return 1;
1102}
1103
1104static UNOP init_perl_op;
1105
1106ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1107init_perl (pTHX_ struct coro *coro)
594{ 1108{
595 /* 1109 /*
596 * emulate part of the perl startup here. 1110 * emulate part of the perl startup here.
597 */ 1111 */
1112 coro_init_stacks (aTHX);
1113
1114 PL_runops = RUNOPS_DEFAULT;
1115 PL_curcop = &PL_compiling;
1116 PL_in_eval = EVAL_NULL;
1117 PL_comppad = 0;
1118 PL_comppad_name = 0;
1119 PL_comppad_name_fill = 0;
1120 PL_comppad_name_floor = 0;
1121 PL_curpm = 0;
1122 PL_curpad = 0;
1123 PL_localizing = 0;
1124 PL_restartop = 0;
1125#if PERL_VERSION_ATLEAST (5,10,0)
1126 PL_parser = 0;
1127#endif
1128 PL_hints = 0;
1129
1130 /* recreate the die/warn hooks */
1131 PL_diehook = SvREFCNT_inc (rv_diehook);
1132 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1133
1134 GvSV (PL_defgv) = newSV (0);
1135 GvAV (PL_defgv) = coro->args; coro->args = 0;
1136 GvSV (PL_errgv) = newSV (0);
1137 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1138 GvHV (PL_hintgv) = 0;
1139 PL_rs = newSVsv (GvSV (irsgv));
1140 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1141
1142 {
1143 dSP;
1144 UNOP myop;
1145
1146 Zero (&myop, 1, UNOP);
1147 myop.op_next = Nullop;
1148 myop.op_type = OP_ENTERSUB;
1149 myop.op_flags = OPf_WANT_VOID;
1150
1151 PUSHMARK (SP);
1152 PUSHs ((SV *)coro->startcv);
1153 PUTBACK;
1154 PL_op = (OP *)&myop;
1155 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1156 }
1157
1158 /* this newly created coroutine might be run on an existing cctx which most
1159 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1160 */
1161 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1162 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1163 slf_frame.destroy = 0;
1164
1165 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1166 init_perl_op.op_next = PL_op;
1167 init_perl_op.op_type = OP_ENTERSUB;
1168 init_perl_op.op_ppaddr = pp_slf;
1169 /* no flags etc. required, as an init function won't be called */
1170
1171 PL_op = (OP *)&init_perl_op;
1172
1173 /* copy throw, in case it was set before init_perl */
1174 CORO_THROW = coro->except;
1175
1176 SWAP_SVS (coro);
1177
1178 if (ecb_expect_false (enable_times))
1179 {
1180 coro_times_update ();
1181 coro_times_sub (coro);
1182 }
1183}
1184
1185static void
1186coro_unwind_stacks (pTHX)
1187{
1188 if (!IN_DESTRUCT)
1189 {
1190 /* restore all saved variables and stuff */
1191 LEAVE_SCOPE (0);
1192 assert (PL_tmps_floor == -1);
1193
1194 /* free all temporaries */
1195 FREETMPS;
1196 assert (PL_tmps_ix == -1);
1197
1198 /* unwind all extra stacks */
1199 POPSTACK_TO (PL_mainstack);
1200
1201 /* unwind main stack */
1202 dounwind (-1);
1203 }
1204}
1205
1206static void
1207destroy_perl (pTHX_ struct coro *coro)
1208{
1209 SV *svf [9];
1210
1211 {
1212 SV *old_current = SvRV (coro_current);
1213 struct coro *current = SvSTATE (old_current);
1214
1215 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1216
1217 save_perl (aTHX_ current);
1218
1219 /* this will cause transfer_check to croak on block*/
1220 SvRV_set (coro_current, (SV *)coro->hv);
1221
1222 load_perl (aTHX_ coro);
1223
1224 coro_unwind_stacks (aTHX);
1225
1226 /* restore swapped sv's */
1227 SWAP_SVS (coro);
1228
1229 coro_destruct_stacks (aTHX);
1230
1231 /* now save some sv's to be free'd later */
1232 svf [0] = GvSV (PL_defgv);
1233 svf [1] = (SV *)GvAV (PL_defgv);
1234 svf [2] = GvSV (PL_errgv);
1235 svf [3] = (SV *)PL_defoutgv;
1236 svf [4] = PL_rs;
1237 svf [5] = GvSV (irsgv);
1238 svf [6] = (SV *)GvHV (PL_hintgv);
1239 svf [7] = PL_diehook;
1240 svf [8] = PL_warnhook;
1241 assert (9 == sizeof (svf) / sizeof (*svf));
1242
1243 SvRV_set (coro_current, old_current);
1244
1245 load_perl (aTHX_ current);
1246 }
1247
1248 {
1249 unsigned int i;
1250
1251 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1252 SvREFCNT_dec (svf [i]);
1253
1254 SvREFCNT_dec (coro->saved_deffh);
1255 SvREFCNT_dec (coro->rouse_cb);
1256 SvREFCNT_dec (coro->invoke_cb);
1257 SvREFCNT_dec (coro->invoke_av);
1258 }
1259}
1260
1261ecb_inline void
1262free_coro_mortal (pTHX)
1263{
1264 if (ecb_expect_true (coro_mortal))
1265 {
1266 SvREFCNT_dec ((SV *)coro_mortal);
1267 coro_mortal = 0;
1268 }
1269}
1270
1271static int
1272runops_trace (pTHX)
1273{
1274 COP *oldcop = 0;
1275 int oldcxix = -2;
1276
1277 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1278 {
1279 PERL_ASYNC_CHECK ();
1280
1281 if (cctx_current->flags & CC_TRACE_ALL)
1282 {
1283 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1284 {
1285 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1286 SV **bot, **top;
1287 AV *av = newAV (); /* return values */
1288 SV **cb;
1289 dSP;
1290
1291 GV *gv = CvGV (cx->blk_sub.cv);
1292 SV *fullname = sv_2mortal (newSV (0));
1293 if (isGV (gv))
1294 gv_efullname3 (fullname, gv, 0);
1295
1296 bot = PL_stack_base + cx->blk_oldsp + 1;
1297 top = cx->blk_gimme == G_ARRAY ? SP + 1
1298 : cx->blk_gimme == G_SCALAR ? bot + 1
1299 : bot;
1300
1301 av_extend (av, top - bot);
1302 while (bot < top)
1303 av_push (av, SvREFCNT_inc_NN (*bot++));
1304
1305 PL_runops = RUNOPS_DEFAULT;
1306 ENTER;
1307 SAVETMPS;
1308 EXTEND (SP, 3);
1309 PUSHMARK (SP);
1310 PUSHs (&PL_sv_no);
1311 PUSHs (fullname);
1312 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
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 if (oldcop != PL_curcop)
1323 {
1324 oldcop = PL_curcop;
1325
1326 if (PL_curcop != &PL_compiling)
1327 {
1328 SV **cb;
1329
1330 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1331 {
1332 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1333
1334 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1335 {
1336 dSP;
1337 GV *gv = CvGV (cx->blk_sub.cv);
1338 SV *fullname = sv_2mortal (newSV (0));
1339
1340 if (isGV (gv))
1341 gv_efullname3 (fullname, gv, 0);
1342
1343 PL_runops = RUNOPS_DEFAULT;
1344 ENTER;
1345 SAVETMPS;
1346 EXTEND (SP, 3);
1347 PUSHMARK (SP);
1348 PUSHs (&PL_sv_yes);
1349 PUSHs (fullname);
1350 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1351 PUTBACK;
1352 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1353 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1354 SPAGAIN;
1355 FREETMPS;
1356 LEAVE;
1357 PL_runops = runops_trace;
1358 }
1359
1360 oldcxix = cxstack_ix;
1361 }
1362
1363 if (cctx_current->flags & CC_TRACE_LINE)
1364 {
1365 dSP;
1366
1367 PL_runops = RUNOPS_DEFAULT;
1368 ENTER;
1369 SAVETMPS;
1370 EXTEND (SP, 3);
1371 PL_runops = RUNOPS_DEFAULT;
1372 PUSHMARK (SP);
1373 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1374 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1375 PUTBACK;
1376 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1377 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1378 SPAGAIN;
1379 FREETMPS;
1380 LEAVE;
1381 PL_runops = runops_trace;
1382 }
1383 }
1384 }
1385 }
1386 }
1387
1388 TAINT_NOT;
1389 return 0;
1390}
1391
1392static struct CoroSLF cctx_ssl_frame;
1393
1394static void
1395slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1396{
1397 ta->prev = 0;
1398}
1399
1400static int
1401slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1402{
1403 *frame = cctx_ssl_frame;
1404
1405 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1406}
1407
1408/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1409static void ecb_noinline
1410cctx_prepare (pTHX)
1411{
1412 PL_top_env = &PL_start_env;
1413
1414 if (cctx_current->flags & CC_TRACE)
1415 PL_runops = runops_trace;
1416
1417 /* we already must be executing an SLF op, there is no other valid way
1418 * that can lead to creation of a new cctx */
1419 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1420 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1421
1422 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1423 cctx_ssl_frame = slf_frame;
1424
1425 slf_frame.prepare = slf_prepare_set_stacklevel;
1426 slf_frame.check = slf_check_set_stacklevel;
1427}
1428
1429/* the tail of transfer: execute stuff we can only do after a transfer */
1430ecb_inline void
1431transfer_tail (pTHX)
1432{
1433 free_coro_mortal (aTHX);
1434}
1435
1436/* try to exit the same way perl's main function would do */
1437/* we do not bother resetting the environment or other things *7
1438/* that are not, uhm, essential */
1439/* this obviously also doesn't work when perl is embedded */
1440static void ecb_noinline ecb_cold
1441perlish_exit (pTHX)
1442{
1443 int exitstatus = perl_destruct (PL_curinterp);
1444 perl_free (PL_curinterp);
1445 exit (exitstatus);
1446}
1447
1448/*
1449 * this is a _very_ stripped down perl interpreter ;)
1450 */
1451static void
1452cctx_run (void *arg)
1453{
1454#ifdef USE_ITHREADS
1455# if CORO_PTHREAD
1456 PERL_SET_CONTEXT (coro_thx);
1457# endif
1458#endif
1459 {
1460 dTHX;
1461
1462 /* normally we would need to skip the entersub here */
1463 /* not doing so will re-execute it, which is exactly what we want */
1464 /* PL_nop = PL_nop->op_next */
1465
1466 /* inject a fake subroutine call to cctx_init */
1467 cctx_prepare (aTHX);
1468
1469 /* cctx_run is the alternative tail of transfer() */
1470 transfer_tail (aTHX);
1471
1472 /* somebody or something will hit me for both perl_run and PL_restartop */
1473 PL_restartop = PL_op;
1474 perl_run (PL_curinterp);
1475 /*
1476 * Unfortunately, there is no way to get at the return values of the
1477 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1478 * runtime errors here, as this is just a random interpreter, not a thread.
1479 */
1480
1481 /*
1482 * If perl-run returns we assume exit() was being called or the coro
1483 * fell off the end, which seems to be the only valid (non-bug)
1484 * reason for perl_run to return. We try to mimic whatever perl is normally
1485 * doing in that case. YMMV.
1486 */
1487 perlish_exit (aTHX);
1488 }
1489}
1490
1491static coro_cctx *
1492cctx_new (void)
1493{
1494 coro_cctx *cctx;
1495
1496 ++cctx_count;
1497 New (0, cctx, 1, coro_cctx);
1498
1499 cctx->gen = cctx_gen;
1500 cctx->flags = 0;
1501 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1502
1503 return cctx;
1504}
1505
1506/* create a new cctx only suitable as source */
1507static coro_cctx *
1508cctx_new_empty (void)
1509{
1510 coro_cctx *cctx = cctx_new ();
1511
1512 cctx->stack.sptr = 0;
1513 coro_create (&cctx->cctx, 0, 0, 0, 0);
1514
1515 return cctx;
1516}
1517
1518/* create a new cctx suitable as destination/running a perl interpreter */
1519static coro_cctx *
1520cctx_new_run (void)
1521{
1522 coro_cctx *cctx = cctx_new ();
1523
1524 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1525 {
1526 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1527 _exit (EXIT_FAILURE);
1528 }
1529
1530 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1531
1532 return cctx;
1533}
1534
1535static void
1536cctx_destroy (coro_cctx *cctx)
1537{
1538 if (!cctx)
1539 return;
1540
1541 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1542
1543 --cctx_count;
1544 coro_destroy (&cctx->cctx);
1545
1546 coro_stack_free (&cctx->stack);
1547
1548 Safefree (cctx);
1549}
1550
1551/* wether this cctx should be destructed */
1552#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1553
1554static coro_cctx *
1555cctx_get (pTHX)
1556{
1557 while (ecb_expect_true (cctx_first))
1558 {
1559 coro_cctx *cctx = cctx_first;
1560 cctx_first = cctx->next;
1561 --cctx_idle;
1562
1563 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1564 return cctx;
1565
1566 cctx_destroy (cctx);
1567 }
1568
1569 return cctx_new_run ();
1570}
1571
1572static void
1573cctx_put (coro_cctx *cctx)
1574{
1575 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1576
1577 /* free another cctx if overlimit */
1578 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1579 {
1580 coro_cctx *first = cctx_first;
1581 cctx_first = first->next;
1582 --cctx_idle;
1583
1584 cctx_destroy (first);
1585 }
1586
1587 ++cctx_idle;
1588 cctx->next = cctx_first;
1589 cctx_first = cctx;
1590}
1591
1592/** coroutine switching *****************************************************/
1593
1594static void
1595transfer_check (pTHX_ struct coro *prev, struct coro *next)
1596{
1597 /* TODO: throwing up here is considered harmful */
1598
1599 if (ecb_expect_true (prev != next))
1600 {
1601 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1602 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1603
1604 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1605 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1606
1607#if !PERL_VERSION_ATLEAST (5,10,0)
1608 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1609 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1610#endif
1611 }
1612}
1613
1614/* always use the TRANSFER macro */
1615static void ecb_noinline /* noinline so we have a fixed stackframe */
1616transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1617{
1618 dSTACKLEVEL;
1619
1620 /* sometimes transfer is only called to set idle_sp */
1621 if (ecb_expect_false (!prev))
1622 {
1623 cctx_current->idle_sp = STACKLEVEL;
1624 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1625 }
1626 else if (ecb_expect_true (prev != next))
1627 {
1628 coro_cctx *cctx_prev;
1629
1630 if (ecb_expect_false (prev->flags & CF_NEW))
1631 {
1632 /* create a new empty/source context */
1633 prev->flags &= ~CF_NEW;
1634 prev->flags |= CF_RUNNING;
1635 }
1636
1637 prev->flags &= ~CF_RUNNING;
1638 next->flags |= CF_RUNNING;
1639
1640 /* first get rid of the old state */
1641 save_perl (aTHX_ prev);
1642
1643 if (ecb_expect_false (next->flags & CF_NEW))
1644 {
1645 /* need to start coroutine */
1646 next->flags &= ~CF_NEW;
1647 /* setup coroutine call */
1648 init_perl (aTHX_ next);
1649 }
1650 else
1651 load_perl (aTHX_ next);
1652
1653 /* possibly untie and reuse the cctx */
1654 if (ecb_expect_true (
1655 cctx_current->idle_sp == STACKLEVEL
1656 && !(cctx_current->flags & CC_TRACE)
1657 && !force_cctx
1658 ))
1659 {
1660 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1661 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1662
1663 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1664 /* without this the next cctx_get might destroy the running cctx while still in use */
1665 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1666 if (ecb_expect_true (!next->cctx))
1667 next->cctx = cctx_get (aTHX);
1668
1669 cctx_put (cctx_current);
1670 }
1671 else
1672 prev->cctx = cctx_current;
1673
1674 ++next->usecount;
1675
1676 cctx_prev = cctx_current;
1677 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1678
1679 next->cctx = 0;
1680
1681 if (ecb_expect_false (cctx_prev != cctx_current))
1682 {
1683 cctx_prev->top_env = PL_top_env;
1684 PL_top_env = cctx_current->top_env;
1685 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1686 }
1687
1688 transfer_tail (aTHX);
1689 }
1690}
1691
1692#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1693#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1694
1695/** high level stuff ********************************************************/
1696
1697/* this function is actually Coro, not Coro::State, but we call it from here */
1698/* because it is convenient - but it hasn't been declared yet for that reason */
1699static void
1700coro_call_on_destroy (pTHX_ struct coro *coro);
1701
1702static void
1703coro_state_destroy (pTHX_ struct coro *coro)
1704{
1705 if (coro->flags & CF_ZOMBIE)
1706 return;
1707
1708 slf_destroy (aTHX_ coro);
1709
1710 coro->flags |= CF_ZOMBIE;
1711
1712 if (coro->flags & CF_READY)
1713 {
1714 /* reduce nready, as destroying a ready coro effectively unreadies it */
1715 /* alternative: look through all ready queues and remove the coro */
1716 --coro_nready;
1717 }
1718 else
1719 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1720
1721 if (coro->next) coro->next->prev = coro->prev;
1722 if (coro->prev) coro->prev->next = coro->next;
1723 if (coro == coro_first) coro_first = coro->next;
1724
1725 if (coro->mainstack
1726 && coro->mainstack != main_mainstack
1727 && coro->slot
1728 && !PL_dirty)
1729 destroy_perl (aTHX_ coro);
1730
1731 cctx_destroy (coro->cctx);
1732 SvREFCNT_dec (coro->startcv);
1733 SvREFCNT_dec (coro->args);
1734 SvREFCNT_dec (coro->swap_sv);
1735 SvREFCNT_dec (CORO_THROW);
1736
1737 coro_call_on_destroy (aTHX_ coro);
1738
1739 /* more destruction mayhem in coro_state_free */
1740}
1741
1742static int
1743coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1744{
1745 struct coro *coro = (struct coro *)mg->mg_ptr;
1746 mg->mg_ptr = 0;
1747
1748 coro_state_destroy (aTHX_ coro);
1749 SvREFCNT_dec (coro->on_destroy);
1750 SvREFCNT_dec (coro->status);
1751
1752 Safefree (coro);
1753
1754 return 0;
1755}
1756
1757static int ecb_cold
1758coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1759{
1760 /* called when perl clones the current process the slow way (windows process emulation) */
1761 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1762 mg->mg_ptr = 0;
1763 mg->mg_virtual = 0;
1764
1765 return 0;
1766}
1767
1768static MGVTBL coro_state_vtbl = {
1769 0, 0, 0, 0,
1770 coro_state_free,
1771 0,
1772#ifdef MGf_DUP
1773 coro_state_dup,
1774#else
1775# define MGf_DUP 0
1776#endif
1777};
1778
1779static void
1780prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1781{
1782 ta->prev = SvSTATE (prev_sv);
1783 ta->next = SvSTATE (next_sv);
1784 TRANSFER_CHECK (*ta);
1785}
1786
1787static void
1788api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1789{
1790 struct coro_transfer_args ta;
1791
1792 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1793 TRANSFER (ta, 1);
1794}
1795
1796/** Coro ********************************************************************/
1797
1798ecb_inline void
1799coro_enq (pTHX_ struct coro *coro)
1800{
1801 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1802
1803 SvREFCNT_inc_NN (coro->hv);
1804
1805 coro->next_ready = 0;
1806 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1807 ready [1] = coro;
1808}
1809
1810ecb_inline struct coro *
1811coro_deq (pTHX)
1812{
1813 int prio;
1814
1815 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1816 {
1817 struct coro **ready = coro_ready [prio];
1818
1819 if (ready [0])
1820 {
1821 struct coro *coro = ready [0];
1822 ready [0] = coro->next_ready;
1823 return coro;
1824 }
1825 }
1826
1827 return 0;
1828}
1829
1830static void
1831invoke_sv_ready_hook_helper (void)
1832{
1833 dTHX;
598 dSP; 1834 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601 1835
602 coro_init_stacks (aTHX); 1836 ENTER;
603 JMPENV_BOOTSTRAP; 1837 SAVETMPS;
604 SPAGAIN;
605 1838
606 /*PL_curcop = 0;*/
607 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args;
609
610 if (ctx->stack)
611 {
612 ctx->cursp = 0;
613
614 PUSHMARK(SP); 1839 PUSHMARK (SP);
615 PUTBACK; 1840 PUTBACK;
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1841 call_sv (coro_readyhook, G_VOID | G_DISCARD);
617 croak ("FATAL: CCTXT coroutine returned!"); 1842
1843 FREETMPS;
1844 LEAVE;
1845}
1846
1847static int
1848api_ready (pTHX_ SV *coro_sv)
1849{
1850 struct coro *coro = SvSTATE (coro_sv);
1851
1852 if (coro->flags & CF_READY)
1853 return 0;
1854
1855 coro->flags |= CF_READY;
1856
1857 coro_enq (aTHX_ coro);
1858
1859 if (!coro_nready++)
1860 if (coroapi.readyhook)
1861 coroapi.readyhook ();
1862
1863 return 1;
1864}
1865
1866static int
1867api_is_ready (pTHX_ SV *coro_sv)
1868{
1869 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1870}
1871
1872/* expects to own a reference to next->hv */
1873ecb_inline void
1874prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1875{
1876 SV *prev_sv = SvRV (coro_current);
1877
1878 ta->prev = SvSTATE_hv (prev_sv);
1879 ta->next = next;
1880
1881 TRANSFER_CHECK (*ta);
1882
1883 SvRV_set (coro_current, (SV *)next->hv);
1884
1885 free_coro_mortal (aTHX);
1886 coro_mortal = prev_sv;
1887}
1888
1889static void
1890prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1891{
1892 for (;;)
618 } 1893 {
619 else 1894 struct coro *next = coro_deq (aTHX);
620 {
621 UNOP myop;
622 1895
623 PL_op = (OP *)&myop; 1896 if (ecb_expect_true (next))
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 }
644}
645
646static void
647continue_coro (void *arg)
648{
649 /*
650 * this is a _very_ stripped down perl interpreter ;)
651 */
652 Coro__State ctx = (Coro__State)arg;
653
654 ctx->cursp = 0;
655 PL_op = PL_op->op_next;
656 CALLRUNOPS(aTHX);
657 /*NORETURN*/
658 abort ();
659}
660
661STATIC void
662transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
663{
664 dSP;
665 dSTACKLEVEL;
666
667 if (prev != next)
668 {
669 if (next->mainstack)
670 { 1897 {
671 SAVE (prev, flags); 1898 /* cannot transfer to destroyed coros, skip and look for next */
672 LOAD (next); 1899 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
673 1900 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
674 /* mark this state as in-use */ 1901 else
675 next->mainstack = 0;
676 next->tmps_ix = -2;
677
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 { 1902 {
681 if (!prev->stack) 1903 next->flags &= ~CF_READY;
682 allocate_stack (prev, 0); 1904 --coro_nready;
683 else if (prev->cursp != stacklevel 1905
684 && prev->stack->usecnt > 1) 1906 prepare_schedule_to (aTHX_ ta, next);
685 { 1907 break;
686 prev->gencnt = ++prev->stack->gencnt;
687 prev->stack->usecnt = 1;
688 }
689
690 /* has our stack been invalidated? */
691 if (next->stack && next->stack->gencnt != next->gencnt)
692 {
693 deallocate_stack (next);
694 allocate_stack (next, 1);
695 coro_create (&(next->stack->cctx),
696 continue_coro, (void *)next,
697 next->stack->sptr, labs (next->stack->ssize));
698 }
699
700 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
701 } 1908 }
702
703 } 1909 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else 1910 else
707 { 1911 {
708 SAVE (prev, -1); /* first get rid of the old state */ 1912 /* nothing to schedule: call the idle handler */
709 1913 if (SvROK (sv_idle)
710 if (flags & TRANSFER_SAVE_CCTXT) 1914 && SvOBJECT (SvRV (sv_idle)))
711 { 1915 {
712 if (!prev->stack) 1916 if (SvRV (sv_idle) == SvRV (coro_current))
713 allocate_stack (prev, 0); 1917 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
714 1918
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1919 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
716 { 1920 api_ready (aTHX_ SvRV (sv_idle));
717 setup_coro (next); 1921 --coro_nready;
718
719 prev->stack->refcnt++;
720 prev->stack->usecnt++;
721 next->stack = prev->stack;
722 next->gencnt = prev->gencnt;
723 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 }
732 } 1922 }
733 else 1923 else
734 setup_coro (next); 1924 {
1925 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1926 dSP;
1927
1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 PUTBACK;
1933 call_sv (sv_idle, G_VOID | G_DISCARD);
1934
1935 FREETMPS;
1936 LEAVE;
1937 }
735 } 1938 }
736 } 1939 }
737
738 next->cursp = stacklevel;
739} 1940}
740 1941
1942ecb_inline void
1943prepare_cede (pTHX_ struct coro_transfer_args *ta)
1944{
1945 api_ready (aTHX_ coro_current);
1946 prepare_schedule (aTHX_ ta);
1947}
1948
1949ecb_inline void
1950prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1951{
1952 SV *prev = SvRV (coro_current);
1953
1954 if (coro_nready)
1955 {
1956 prepare_schedule (aTHX_ ta);
1957 api_ready (aTHX_ prev);
1958 }
1959 else
1960 prepare_nop (aTHX_ ta);
1961}
1962
1963static void
1964api_schedule (pTHX)
1965{
1966 struct coro_transfer_args ta;
1967
1968 prepare_schedule (aTHX_ &ta);
1969 TRANSFER (ta, 1);
1970}
1971
1972static void
1973api_schedule_to (pTHX_ SV *coro_sv)
1974{
1975 struct coro_transfer_args ta;
1976 struct coro *next = SvSTATE (coro_sv);
1977
1978 SvREFCNT_inc_NN (coro_sv);
1979 prepare_schedule_to (aTHX_ &ta, next);
1980}
1981
1982static int
1983api_cede (pTHX)
1984{
1985 struct coro_transfer_args ta;
1986
1987 prepare_cede (aTHX_ &ta);
1988
1989 if (ecb_expect_true (ta.prev != ta.next))
1990 {
1991 TRANSFER (ta, 1);
1992 return 1;
1993 }
1994 else
1995 return 0;
1996}
1997
1998static int
1999api_cede_notself (pTHX)
2000{
2001 if (coro_nready)
2002 {
2003 struct coro_transfer_args ta;
2004
2005 prepare_cede_notself (aTHX_ &ta);
2006 TRANSFER (ta, 1);
2007 return 1;
2008 }
2009 else
2010 return 0;
2011}
2012
2013static void
2014api_trace (pTHX_ SV *coro_sv, int flags)
2015{
2016 struct coro *coro = SvSTATE (coro_sv);
2017
2018 if (coro->flags & CF_RUNNING)
2019 croak ("cannot enable tracing on a running coroutine, caught");
2020
2021 if (flags & CC_TRACE)
2022 {
2023 if (!coro->cctx)
2024 coro->cctx = cctx_new_run ();
2025 else if (!(coro->cctx->flags & CC_TRACE))
2026 croak ("cannot enable tracing on coroutine with custom stack, caught");
2027
2028 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2029 }
2030 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2031 {
2032 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2033
2034 if (coro->flags & CF_RUNNING)
2035 PL_runops = RUNOPS_DEFAULT;
2036 else
2037 coro->slot->runops = RUNOPS_DEFAULT;
2038 }
2039}
2040
2041static void
2042coro_push_av (pTHX_ AV *av, I32 gimme_v)
2043{
2044 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2045 {
2046 dSP;
2047
2048 if (gimme_v == G_SCALAR)
2049 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2050 else
2051 {
2052 int i;
2053 EXTEND (SP, AvFILLp (av) + 1);
2054
2055 for (i = 0; i <= AvFILLp (av); ++i)
2056 PUSHs (AvARRAY (av)[i]);
2057 }
2058
2059 PUTBACK;
2060 }
2061}
2062
2063static void
2064coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2065{
2066 if (!coro->on_destroy)
2067 coro->on_destroy = newAV ();
2068
2069 av_push (coro->on_destroy, cb);
2070}
2071
2072static void
2073slf_destroy_join (pTHX_ struct CoroSLF *frame)
2074{
2075 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2076}
2077
2078static int
2079slf_check_join (pTHX_ struct CoroSLF *frame)
2080{
2081 struct coro *coro = (struct coro *)frame->data;
2082
2083 if (!coro->status)
2084 return 1;
2085
2086 frame->destroy = 0;
2087
2088 coro_push_av (aTHX_ coro->status, GIMME_V);
2089
2090 SvREFCNT_dec ((SV *)coro->hv);
2091
2092 return 0;
2093}
2094
2095static void
2096slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2097{
2098 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2099
2100 if (items > 1)
2101 croak ("join called with too many arguments");
2102
2103 if (coro->status)
2104 frame->prepare = prepare_nop;
2105 else
2106 {
2107 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2108 frame->prepare = prepare_schedule;
2109 }
2110
2111 frame->check = slf_check_join;
2112 frame->destroy = slf_destroy_join;
2113 frame->data = (void *)coro;
2114 SvREFCNT_inc (coro->hv);
2115}
2116
2117static void
2118coro_call_on_destroy (pTHX_ struct coro *coro)
2119{
2120 AV *od = coro->on_destroy;
2121
2122 if (!od)
2123 return;
2124
2125 coro->on_destroy = 0;
2126 sv_2mortal ((SV *)od);
2127
2128 while (AvFILLp (od) >= 0)
2129 {
2130 SV *cb = sv_2mortal (av_pop (od));
2131
2132 /* coro hv's (and only hv's at the moment) are supported as well */
2133 if (SvSTATEhv_p (aTHX_ cb))
2134 api_ready (aTHX_ cb);
2135 else
2136 {
2137 dSP; /* don't disturb outer sp */
2138 PUSHMARK (SP);
2139
2140 if (coro->status)
2141 {
2142 PUTBACK;
2143 coro_push_av (aTHX_ coro->status, G_ARRAY);
2144 SPAGAIN;
2145 }
2146
2147 PUTBACK;
2148 call_sv (cb, G_VOID | G_DISCARD);
2149 }
2150 }
2151}
2152
2153static void
2154coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2155{
2156 AV *av;
2157
2158 if (coro->status)
2159 {
2160 av = coro->status;
2161 av_clear (av);
2162 }
2163 else
2164 av = coro->status = newAV ();
2165
2166 /* items are actually not so common, so optimise for this case */
2167 if (items)
2168 {
2169 int i;
2170
2171 av_extend (av, items - 1);
2172
2173 for (i = 0; i < items; ++i)
2174 av_push (av, SvREFCNT_inc_NN (arg [i]));
2175 }
2176}
2177
2178static void
2179slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2180{
2181 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2182 api_ready (aTHX_ sv_manager);
2183
2184 frame->prepare = prepare_schedule;
2185 frame->check = slf_check_repeat;
2186
2187 /* as a minor optimisation, we could unwind all stacks here */
2188 /* but that puts extra pressure on pp_slf, and is not worth much */
2189 /*coro_unwind_stacks (aTHX);*/
2190}
2191
2192static void
2193slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2194{
2195 HV *coro_hv = (HV *)SvRV (coro_current);
2196
2197 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2198 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2199}
2200
2201static void
2202slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2203{
2204 HV *coro_hv;
2205 struct coro *coro;
2206
2207 if (items <= 0)
2208 croak ("Coro::cancel called without coro object,");
2209
2210 coro = SvSTATE (arg [0]);
2211 coro_hv = coro->hv;
2212
2213 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2214
2215 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2216 {
2217 /* coro currently busy cancelling something, so just notify it */
2218 coro->slf_frame.data = (void *)coro;
2219
2220 frame->prepare = prepare_nop;
2221 frame->check = slf_check_nop;
2222 }
2223 else if (coro_hv == (HV *)SvRV (coro_current))
2224 {
2225 /* cancelling the current coro is allowed, and equals terminate */
2226 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2227 }
2228 else
2229 {
2230 struct coro *self = SvSTATE_current;
2231
2232 /* otherwise we cancel directly, purely for speed reasons
2233 * unfortunately, this requires some magic trickery, as
2234 * somebody else could cancel us, so we have to fight the cancellation.
2235 * this is ugly, and hopefully fully worth the extra speed.
2236 * besides, I can't get the slow-but-safe version working...
2237 */
2238 slf_frame.data = 0;
2239 self->flags |= CF_NOCANCEL;
2240 coro_state_destroy (aTHX_ coro);
2241 self->flags &= ~CF_NOCANCEL;
2242
2243 if (slf_frame.data)
2244 {
2245 /* while we were busy we have been cancelled, so terminate */
2246 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2247 }
2248 else
2249 {
2250 frame->prepare = prepare_nop;
2251 frame->check = slf_check_nop;
2252 }
2253 }
2254}
2255
2256static int
2257slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2258{
2259 frame->prepare = 0;
2260 coro_unwind_stacks (aTHX);
2261
2262 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2263
2264 return 1;
2265}
2266
2267static int
2268safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2269{
2270 if (coro->cctx)
2271 croak ("coro inside C callback, unable to cancel at this time, caught");
2272
2273 if (coro->flags & CF_NEW)
2274 {
2275 coro_set_status (aTHX_ coro, arg, items);
2276 coro_state_destroy (aTHX_ coro);
2277 }
2278 else
2279 {
2280 if (!coro->slf_frame.prepare)
2281 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2282
2283 slf_destroy (aTHX_ coro);
2284
2285 coro_set_status (aTHX_ coro, arg, items);
2286 coro->slf_frame.prepare = prepare_nop;
2287 coro->slf_frame.check = slf_check_safe_cancel;
2288
2289 api_ready (aTHX_ (SV *)coro->hv);
2290 }
2291
2292 return 1;
2293}
2294
2295/*****************************************************************************/
2296/* async pool handler */
2297
2298static int
2299slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2300{
2301 HV *hv = (HV *)SvRV (coro_current);
2302 struct coro *coro = (struct coro *)frame->data;
2303
2304 if (!coro->invoke_cb)
2305 return 1; /* loop till we have invoke */
2306 else
2307 {
2308 hv_store (hv, "desc", sizeof ("desc") - 1,
2309 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2310
2311 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2312
2313 {
2314 dSP;
2315 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2316 PUTBACK;
2317 }
2318
2319 SvREFCNT_dec (GvAV (PL_defgv));
2320 GvAV (PL_defgv) = coro->invoke_av;
2321 coro->invoke_av = 0;
2322
2323 return 0;
2324 }
2325}
2326
2327static void
2328slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2329{
2330 HV *hv = (HV *)SvRV (coro_current);
2331 struct coro *coro = SvSTATE_hv ((SV *)hv);
2332
2333 if (ecb_expect_true (coro->saved_deffh))
2334 {
2335 /* subsequent iteration */
2336 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2337 coro->saved_deffh = 0;
2338
2339 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2340 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2341 {
2342 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2343 return;
2344 }
2345 else
2346 {
2347 av_clear (GvAV (PL_defgv));
2348 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2349
2350 coro->prio = 0;
2351
2352 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2353 api_trace (aTHX_ coro_current, 0);
2354
2355 frame->prepare = prepare_schedule;
2356 av_push (av_async_pool, SvREFCNT_inc (hv));
2357 }
2358 }
2359 else
2360 {
2361 /* first iteration, simply fall through */
2362 frame->prepare = prepare_nop;
2363 }
2364
2365 frame->check = slf_check_pool_handler;
2366 frame->data = (void *)coro;
2367}
2368
2369/*****************************************************************************/
2370/* rouse callback */
2371
2372#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2373
2374static void
2375coro_rouse_callback (pTHX_ CV *cv)
2376{
2377 dXSARGS;
2378 SV *data = (SV *)S_GENSUB_ARG;
2379
2380 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2381 {
2382 /* first call, set args */
2383 SV *coro = SvRV (data);
2384 AV *av = newAV ();
2385
2386 SvRV_set (data, (SV *)av);
2387
2388 /* better take a full copy of the arguments */
2389 while (items--)
2390 av_store (av, items, newSVsv (ST (items)));
2391
2392 api_ready (aTHX_ coro);
2393 SvREFCNT_dec (coro);
2394 }
2395
2396 XSRETURN_EMPTY;
2397}
2398
2399static int
2400slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2401{
2402 SV *data = (SV *)frame->data;
2403
2404 if (CORO_THROW)
2405 return 0;
2406
2407 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2408 return 1;
2409
2410 /* now push all results on the stack */
2411 {
2412 dSP;
2413 AV *av = (AV *)SvRV (data);
2414 int i;
2415
2416 EXTEND (SP, AvFILLp (av) + 1);
2417 for (i = 0; i <= AvFILLp (av); ++i)
2418 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2419
2420 /* we have stolen the elements, so set length to zero and free */
2421 AvFILLp (av) = -1;
2422 av_undef (av);
2423
2424 PUTBACK;
2425 }
2426
2427 return 0;
2428}
2429
2430static void
2431slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 SV *cb;
2434
2435 if (items)
2436 cb = arg [0];
2437 else
2438 {
2439 struct coro *coro = SvSTATE_current;
2440
2441 if (!coro->rouse_cb)
2442 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2443
2444 cb = sv_2mortal (coro->rouse_cb);
2445 coro->rouse_cb = 0;
2446 }
2447
2448 if (!SvROK (cb)
2449 || SvTYPE (SvRV (cb)) != SVt_PVCV
2450 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2451 croak ("Coro::rouse_wait called with illegal callback argument,");
2452
2453 {
2454 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2455 SV *data = (SV *)S_GENSUB_ARG;
2456
2457 frame->data = (void *)data;
2458 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2459 frame->check = slf_check_rouse_wait;
2460 }
2461}
2462
2463static SV *
2464coro_new_rouse_cb (pTHX)
2465{
2466 HV *hv = (HV *)SvRV (coro_current);
2467 struct coro *coro = SvSTATE_hv (hv);
2468 SV *data = newRV_inc ((SV *)hv);
2469 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2470
2471 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2472 SvREFCNT_dec (data); /* magicext increases the refcount */
2473
2474 SvREFCNT_dec (coro->rouse_cb);
2475 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2476
2477 return cb;
2478}
2479
2480/*****************************************************************************/
2481/* schedule-like-function opcode (SLF) */
2482
2483static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2484static const CV *slf_cv;
2485static SV **slf_argv;
2486static int slf_argc, slf_arga; /* count, allocated */
2487static I32 slf_ax; /* top of stack, for restore */
2488
2489/* this restores the stack in the case we patched the entersub, to */
2490/* recreate the stack frame as perl will on following calls */
2491/* since entersub cleared the stack */
2492static OP *
2493pp_restore (pTHX)
2494{
2495 int i;
2496 SV **SP = PL_stack_base + slf_ax;
2497
2498 PUSHMARK (SP);
2499
2500 EXTEND (SP, slf_argc + 1);
2501
2502 for (i = 0; i < slf_argc; ++i)
2503 PUSHs (sv_2mortal (slf_argv [i]));
2504
2505 PUSHs ((SV *)CvGV (slf_cv));
2506
2507 RETURNOP (slf_restore.op_first);
2508}
2509
2510static void
2511slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2512{
2513 SV **arg = (SV **)slf_frame.data;
2514
2515 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2516}
2517
2518static void
2519slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 if (items != 2)
2522 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2523
2524 frame->prepare = slf_prepare_transfer;
2525 frame->check = slf_check_nop;
2526 frame->data = (void *)arg; /* let's hope it will stay valid */
2527}
2528
2529static void
2530slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 frame->prepare = prepare_schedule;
2533 frame->check = slf_check_nop;
2534}
2535
2536static void
2537slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2538{
2539 struct coro *next = (struct coro *)slf_frame.data;
2540
2541 SvREFCNT_inc_NN (next->hv);
2542 prepare_schedule_to (aTHX_ ta, next);
2543}
2544
2545static void
2546slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2547{
2548 if (!items)
2549 croak ("Coro::schedule_to expects a coroutine argument, caught");
2550
2551 frame->data = (void *)SvSTATE (arg [0]);
2552 frame->prepare = slf_prepare_schedule_to;
2553 frame->check = slf_check_nop;
2554}
2555
2556static void
2557slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2558{
2559 api_ready (aTHX_ SvRV (coro_current));
2560
2561 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2562}
2563
2564static void
2565slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2566{
2567 frame->prepare = prepare_cede;
2568 frame->check = slf_check_nop;
2569}
2570
2571static void
2572slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 frame->prepare = prepare_cede_notself;
2575 frame->check = slf_check_nop;
2576}
2577
2578/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2579static void
2580slf_destroy (pTHX_ struct coro *coro)
2581{
2582 /* this callback is reserved for slf functions needing to do cleanup */
2583 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2584 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2585
2586 /*
2587 * The on_destroy above most likely is from an SLF call.
2588 * Since by definition the SLF call will not finish when we destroy
2589 * the coro, we will have to force-finish it here, otherwise
2590 * cleanup functions cannot call SLF functions.
2591 */
2592 coro->slf_frame.prepare = 0;
2593}
2594
2595/*
2596 * these not obviously related functions are all rolled into one
2597 * function to increase chances that they all will call transfer with the same
2598 * stack offset
2599 * SLF stands for "schedule-like-function".
2600 */
2601static OP *
2602pp_slf (pTHX)
2603{
2604 I32 checkmark; /* mark SP to see how many elements check has pushed */
2605
2606 /* set up the slf frame, unless it has already been set-up */
2607 /* the latter happens when a new coro has been started */
2608 /* or when a new cctx was attached to an existing coroutine */
2609 if (ecb_expect_true (!slf_frame.prepare))
2610 {
2611 /* first iteration */
2612 dSP;
2613 SV **arg = PL_stack_base + TOPMARK + 1;
2614 int items = SP - arg; /* args without function object */
2615 SV *gv = *sp;
2616
2617 /* do a quick consistency check on the "function" object, and if it isn't */
2618 /* for us, divert to the real entersub */
2619 if (SvTYPE (gv) != SVt_PVGV
2620 || !GvCV (gv)
2621 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2622 return PL_ppaddr[OP_ENTERSUB](aTHX);
2623
2624 if (!(PL_op->op_flags & OPf_STACKED))
2625 {
2626 /* ampersand-form of call, use @_ instead of stack */
2627 AV *av = GvAV (PL_defgv);
2628 arg = AvARRAY (av);
2629 items = AvFILLp (av) + 1;
2630 }
2631
2632 /* now call the init function, which needs to set up slf_frame */
2633 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2634 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2635
2636 /* pop args */
2637 SP = PL_stack_base + POPMARK;
2638
2639 PUTBACK;
2640 }
2641
2642 /* now that we have a slf_frame, interpret it! */
2643 /* we use a callback system not to make the code needlessly */
2644 /* complicated, but so we can run multiple perl coros from one cctx */
2645
2646 do
2647 {
2648 struct coro_transfer_args ta;
2649
2650 slf_frame.prepare (aTHX_ &ta);
2651 TRANSFER (ta, 0);
2652
2653 checkmark = PL_stack_sp - PL_stack_base;
2654 }
2655 while (slf_frame.check (aTHX_ &slf_frame));
2656
2657 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2658
2659 /* exception handling */
2660 if (ecb_expect_false (CORO_THROW))
2661 {
2662 SV *exception = sv_2mortal (CORO_THROW);
2663
2664 CORO_THROW = 0;
2665 sv_setsv (ERRSV, exception);
2666 croak (0);
2667 }
2668
2669 /* return value handling - mostly like entersub */
2670 /* make sure we put something on the stack in scalar context */
2671 if (GIMME_V == G_SCALAR
2672 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2673 {
2674 dSP;
2675 SV **bot = PL_stack_base + checkmark;
2676
2677 if (sp == bot) /* too few, push undef */
2678 bot [1] = &PL_sv_undef;
2679 else /* too many, take last one */
2680 bot [1] = *sp;
2681
2682 SP = bot + 1;
2683
2684 PUTBACK;
2685 }
2686
2687 return NORMAL;
2688}
2689
2690static void
2691api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2692{
2693 int i;
2694 SV **arg = PL_stack_base + ax;
2695 int items = PL_stack_sp - arg + 1;
2696
2697 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2698
2699 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2700 && PL_op->op_ppaddr != pp_slf)
2701 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2702
2703 CvFLAGS (cv) |= CVf_SLF;
2704 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2705 slf_cv = cv;
2706
2707 /* we patch the op, and then re-run the whole call */
2708 /* we have to put the same argument on the stack for this to work */
2709 /* and this will be done by pp_restore */
2710 slf_restore.op_next = (OP *)&slf_restore;
2711 slf_restore.op_type = OP_CUSTOM;
2712 slf_restore.op_ppaddr = pp_restore;
2713 slf_restore.op_first = PL_op;
2714
2715 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2716
2717 if (PL_op->op_flags & OPf_STACKED)
2718 {
2719 if (items > slf_arga)
2720 {
2721 slf_arga = items;
2722 Safefree (slf_argv);
2723 New (0, slf_argv, slf_arga, SV *);
2724 }
2725
2726 slf_argc = items;
2727
2728 for (i = 0; i < items; ++i)
2729 slf_argv [i] = SvREFCNT_inc (arg [i]);
2730 }
2731 else
2732 slf_argc = 0;
2733
2734 PL_op->op_ppaddr = pp_slf;
2735 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2736
2737 PL_op = (OP *)&slf_restore;
2738}
2739
2740/*****************************************************************************/
2741/* dynamic wind */
2742
2743static void
2744on_enterleave_call (pTHX_ SV *cb)
2745{
2746 dSP;
2747
2748 PUSHSTACK;
2749
2750 PUSHMARK (SP);
2751 PUTBACK;
2752 call_sv (cb, G_VOID | G_DISCARD);
2753 SPAGAIN;
2754
2755 POPSTACK;
2756}
2757
2758static SV *
2759coro_avp_pop_and_free (pTHX_ AV **avp)
2760{
2761 AV *av = *avp;
2762 SV *res = av_pop (av);
2763
2764 if (AvFILLp (av) < 0)
2765 {
2766 *avp = 0;
2767 SvREFCNT_dec (av);
2768 }
2769
2770 return res;
2771}
2772
2773static void
2774coro_pop_on_enter (pTHX_ void *coro)
2775{
2776 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2777 SvREFCNT_dec (cb);
2778}
2779
2780static void
2781coro_pop_on_leave (pTHX_ void *coro)
2782{
2783 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2784 on_enterleave_call (aTHX_ sv_2mortal (cb));
2785}
2786
2787/*****************************************************************************/
2788/* PerlIO::cede */
2789
2790typedef struct
2791{
2792 PerlIOBuf base;
2793 NV next, every;
2794} PerlIOCede;
2795
2796static IV ecb_cold
2797PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2798{
2799 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2800
2801 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2802 self->next = nvtime () + self->every;
2803
2804 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2805}
2806
2807static SV * ecb_cold
2808PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2809{
2810 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2811
2812 return newSVnv (self->every);
2813}
2814
2815static IV
2816PerlIOCede_flush (pTHX_ PerlIO *f)
2817{
2818 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2819 double now = nvtime ();
2820
2821 if (now >= self->next)
2822 {
2823 api_cede (aTHX);
2824 self->next = now + self->every;
2825 }
2826
2827 return PerlIOBuf_flush (aTHX_ f);
2828}
2829
2830static PerlIO_funcs PerlIO_cede =
2831{
2832 sizeof(PerlIO_funcs),
2833 "cede",
2834 sizeof(PerlIOCede),
2835 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2836 PerlIOCede_pushed,
2837 PerlIOBuf_popped,
2838 PerlIOBuf_open,
2839 PerlIOBase_binmode,
2840 PerlIOCede_getarg,
2841 PerlIOBase_fileno,
2842 PerlIOBuf_dup,
2843 PerlIOBuf_read,
2844 PerlIOBuf_unread,
2845 PerlIOBuf_write,
2846 PerlIOBuf_seek,
2847 PerlIOBuf_tell,
2848 PerlIOBuf_close,
2849 PerlIOCede_flush,
2850 PerlIOBuf_fill,
2851 PerlIOBase_eof,
2852 PerlIOBase_error,
2853 PerlIOBase_clearerr,
2854 PerlIOBase_setlinebuf,
2855 PerlIOBuf_get_base,
2856 PerlIOBuf_bufsiz,
2857 PerlIOBuf_get_ptr,
2858 PerlIOBuf_get_cnt,
2859 PerlIOBuf_set_ptrcnt,
2860};
2861
2862/*****************************************************************************/
2863/* Coro::Semaphore & Coro::Signal */
2864
2865static SV *
2866coro_waitarray_new (pTHX_ int count)
2867{
2868 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2869 AV *av = newAV ();
2870 SV **ary;
2871
2872 /* unfortunately, building manually saves memory */
2873 Newx (ary, 2, SV *);
2874 AvALLOC (av) = ary;
2875#if PERL_VERSION_ATLEAST (5,10,0)
2876 AvARRAY (av) = ary;
2877#else
2878 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2879 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2880 SvPVX ((SV *)av) = (char *)ary;
2881#endif
2882 AvMAX (av) = 1;
2883 AvFILLp (av) = 0;
2884 ary [0] = newSViv (count);
2885
2886 return newRV_noinc ((SV *)av);
2887}
2888
2889/* semaphore */
2890
2891static void
2892coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2893{
2894 SV *count_sv = AvARRAY (av)[0];
2895 IV count = SvIVX (count_sv);
2896
2897 count += adjust;
2898 SvIVX (count_sv) = count;
2899
2900 /* now wake up as many waiters as are expected to lock */
2901 while (count > 0 && AvFILLp (av) > 0)
2902 {
2903 SV *cb;
2904
2905 /* swap first two elements so we can shift a waiter */
2906 AvARRAY (av)[0] = AvARRAY (av)[1];
2907 AvARRAY (av)[1] = count_sv;
2908 cb = av_shift (av);
2909
2910 if (SvOBJECT (cb))
2911 {
2912 api_ready (aTHX_ cb);
2913 --count;
2914 }
2915 else if (SvTYPE (cb) == SVt_PVCV)
2916 {
2917 dSP;
2918 PUSHMARK (SP);
2919 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2920 PUTBACK;
2921 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2922 }
2923
2924 SvREFCNT_dec (cb);
2925 }
2926}
2927
2928static void
2929coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2930{
2931 /* call $sem->adjust (0) to possibly wake up some other waiters */
2932 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2933}
2934
2935static int
2936slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2937{
2938 AV *av = (AV *)frame->data;
2939 SV *count_sv = AvARRAY (av)[0];
2940 SV *coro_hv = SvRV (coro_current);
2941
2942 /* if we are about to throw, don't actually acquire the lock, just throw */
2943 if (CORO_THROW)
2944 return 0;
2945 else if (SvIVX (count_sv) > 0)
2946 {
2947 frame->destroy = 0;
2948
2949 if (acquire)
2950 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2951 else
2952 coro_semaphore_adjust (aTHX_ av, 0);
2953
2954 return 0;
2955 }
2956 else
2957 {
2958 int i;
2959 /* if we were woken up but can't down, we look through the whole */
2960 /* waiters list and only add us if we aren't in there already */
2961 /* this avoids some degenerate memory usage cases */
2962 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2963 if (AvARRAY (av)[i] == coro_hv)
2964 return 1;
2965
2966 av_push (av, SvREFCNT_inc (coro_hv));
2967 return 1;
2968 }
2969}
2970
2971static int
2972slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2975}
2976
2977static int
2978slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2979{
2980 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2981}
2982
2983static void
2984slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2985{
2986 AV *av = (AV *)SvRV (arg [0]);
2987
2988 if (SvIVX (AvARRAY (av)[0]) > 0)
2989 {
2990 frame->data = (void *)av;
2991 frame->prepare = prepare_nop;
2992 }
2993 else
2994 {
2995 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2996
2997 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2998 frame->prepare = prepare_schedule;
2999 /* to avoid race conditions when a woken-up coro gets terminated */
3000 /* we arrange for a temporary on_destroy that calls adjust (0) */
3001 frame->destroy = coro_semaphore_destroy;
3002 }
3003}
3004
3005static void
3006slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3009 frame->check = slf_check_semaphore_down;
3010}
3011
3012static void
3013slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3014{
3015 if (items >= 2)
3016 {
3017 /* callback form */
3018 AV *av = (AV *)SvRV (arg [0]);
3019 SV *cb_cv = s_get_cv_croak (arg [1]);
3020
3021 av_push (av, SvREFCNT_inc_NN (cb_cv));
3022
3023 if (SvIVX (AvARRAY (av)[0]) > 0)
3024 coro_semaphore_adjust (aTHX_ av, 0);
3025
3026 frame->prepare = prepare_nop;
3027 frame->check = slf_check_nop;
3028 }
3029 else
3030 {
3031 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3032 frame->check = slf_check_semaphore_wait;
3033 }
3034}
3035
3036/* signal */
3037
3038static void
3039coro_signal_wake (pTHX_ AV *av, int count)
3040{
3041 SvIVX (AvARRAY (av)[0]) = 0;
3042
3043 /* now signal count waiters */
3044 while (count > 0 && AvFILLp (av) > 0)
3045 {
3046 SV *cb;
3047
3048 /* swap first two elements so we can shift a waiter */
3049 cb = AvARRAY (av)[0];
3050 AvARRAY (av)[0] = AvARRAY (av)[1];
3051 AvARRAY (av)[1] = cb;
3052
3053 cb = av_shift (av);
3054
3055 if (SvTYPE (cb) == SVt_PVCV)
3056 {
3057 dSP;
3058 PUSHMARK (SP);
3059 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3060 PUTBACK;
3061 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3062 }
3063 else
3064 {
3065 api_ready (aTHX_ cb);
3066 sv_setiv (cb, 0); /* signal waiter */
3067 }
3068
3069 SvREFCNT_dec (cb);
3070
3071 --count;
3072 }
3073}
3074
3075static int
3076slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3077{
3078 /* if we are about to throw, also stop waiting */
3079 return SvROK ((SV *)frame->data) && !CORO_THROW;
3080}
3081
3082static void
3083slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3084{
3085 AV *av = (AV *)SvRV (arg [0]);
3086
3087 if (items >= 2)
3088 {
3089 SV *cb_cv = s_get_cv_croak (arg [1]);
3090 av_push (av, SvREFCNT_inc_NN (cb_cv));
3091
3092 if (SvIVX (AvARRAY (av)[0]))
3093 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3094
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else if (SvIVX (AvARRAY (av)[0]))
3099 {
3100 SvIVX (AvARRAY (av)[0]) = 0;
3101 frame->prepare = prepare_nop;
3102 frame->check = slf_check_nop;
3103 }
3104 else
3105 {
3106 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3107
3108 av_push (av, waiter);
3109
3110 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3111 frame->prepare = prepare_schedule;
3112 frame->check = slf_check_signal_wait;
3113 }
3114}
3115
3116/*****************************************************************************/
3117/* Coro::AIO */
3118
3119#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3120
3121/* helper storage struct */
3122struct io_state
3123{
3124 int errorno;
3125 I32 laststype; /* U16 in 5.10.0 */
3126 int laststatval;
3127 Stat_t statcache;
3128};
3129
3130static void
3131coro_aio_callback (pTHX_ CV *cv)
3132{
3133 dXSARGS;
3134 AV *state = (AV *)S_GENSUB_ARG;
3135 SV *coro = av_pop (state);
3136 SV *data_sv = newSV (sizeof (struct io_state));
3137
3138 av_extend (state, items - 1);
3139
3140 sv_upgrade (data_sv, SVt_PV);
3141 SvCUR_set (data_sv, sizeof (struct io_state));
3142 SvPOK_only (data_sv);
3143
3144 {
3145 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3146
3147 data->errorno = errno;
3148 data->laststype = PL_laststype;
3149 data->laststatval = PL_laststatval;
3150 data->statcache = PL_statcache;
3151 }
3152
3153 /* now build the result vector out of all the parameters and the data_sv */
3154 {
3155 int i;
3156
3157 for (i = 0; i < items; ++i)
3158 av_push (state, SvREFCNT_inc_NN (ST (i)));
3159 }
3160
3161 av_push (state, data_sv);
3162
3163 api_ready (aTHX_ coro);
3164 SvREFCNT_dec (coro);
3165 SvREFCNT_dec ((AV *)state);
3166}
3167
3168static int
3169slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3170{
3171 AV *state = (AV *)frame->data;
3172
3173 /* if we are about to throw, return early */
3174 /* this does not cancel the aio request, but at least */
3175 /* it quickly returns */
3176 if (CORO_THROW)
3177 return 0;
3178
3179 /* one element that is an RV? repeat! */
3180 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3181 return 1;
3182
3183 /* restore status */
3184 {
3185 SV *data_sv = av_pop (state);
3186 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3187
3188 errno = data->errorno;
3189 PL_laststype = data->laststype;
3190 PL_laststatval = data->laststatval;
3191 PL_statcache = data->statcache;
3192
3193 SvREFCNT_dec (data_sv);
3194 }
3195
3196 /* push result values */
3197 {
3198 dSP;
3199 int i;
3200
3201 EXTEND (SP, AvFILLp (state) + 1);
3202 for (i = 0; i <= AvFILLp (state); ++i)
3203 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3204
3205 PUTBACK;
3206 }
3207
3208 return 0;
3209}
3210
3211static void
3212slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3213{
3214 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3215 SV *coro_hv = SvRV (coro_current);
3216 struct coro *coro = SvSTATE_hv (coro_hv);
3217
3218 /* put our coroutine id on the state arg */
3219 av_push (state, SvREFCNT_inc_NN (coro_hv));
3220
3221 /* first see whether we have a non-zero priority and set it as AIO prio */
3222 if (coro->prio)
3223 {
3224 dSP;
3225
3226 static SV *prio_cv;
3227 static SV *prio_sv;
3228
3229 if (ecb_expect_false (!prio_cv))
3230 {
3231 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3232 prio_sv = newSViv (0);
3233 }
3234
3235 PUSHMARK (SP);
3236 sv_setiv (prio_sv, coro->prio);
3237 XPUSHs (prio_sv);
3238
3239 PUTBACK;
3240 call_sv (prio_cv, G_VOID | G_DISCARD);
3241 }
3242
3243 /* now call the original request */
3244 {
3245 dSP;
3246 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3247 int i;
3248
3249 PUSHMARK (SP);
3250
3251 /* first push all args to the stack */
3252 EXTEND (SP, items + 1);
3253
3254 for (i = 0; i < items; ++i)
3255 PUSHs (arg [i]);
3256
3257 /* now push the callback closure */
3258 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3259
3260 /* now call the AIO function - we assume our request is uncancelable */
3261 PUTBACK;
3262 call_sv ((SV *)req, G_VOID | G_DISCARD);
3263 }
3264
3265 /* now that the request is going, we loop till we have a result */
3266 frame->data = (void *)state;
3267 frame->prepare = prepare_schedule;
3268 frame->check = slf_check_aio_req;
3269}
3270
3271static void
3272coro_aio_req_xs (pTHX_ CV *cv)
3273{
3274 dXSARGS;
3275
3276 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3277
3278 XSRETURN_EMPTY;
3279}
3280
3281/*****************************************************************************/
3282
3283#if CORO_CLONE
3284# include "clone.c"
3285#endif
3286
3287/*****************************************************************************/
3288
3289static SV *
3290coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3291{
3292 SV *coro_sv;
3293 struct coro *coro;
3294 MAGIC *mg;
3295 HV *hv;
3296 SV *cb;
3297 int i;
3298
3299 if (argc > 0)
3300 {
3301 cb = s_get_cv_croak (argv [0]);
3302
3303 if (!is_coro)
3304 {
3305 if (CvISXSUB (cb))
3306 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3307
3308 if (!CvROOT (cb))
3309 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3310 }
3311 }
3312
3313 Newz (0, coro, 1, struct coro);
3314 coro->args = newAV ();
3315 coro->flags = CF_NEW;
3316
3317 if (coro_first) coro_first->prev = coro;
3318 coro->next = coro_first;
3319 coro_first = coro;
3320
3321 coro->hv = hv = newHV ();
3322 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3323 mg->mg_flags |= MGf_DUP;
3324 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3325
3326 if (argc > 0)
3327 {
3328 av_extend (coro->args, argc + is_coro - 1);
3329
3330 if (is_coro)
3331 {
3332 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3333 cb = (SV *)cv_coro_run;
3334 }
3335
3336 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3337
3338 for (i = 1; i < argc; i++)
3339 av_push (coro->args, newSVsv (argv [i]));
3340 }
3341
3342 return coro_sv;
3343}
3344
3345#ifndef __cplusplus
3346ecb_cold XS(boot_Coro__State);
3347#endif
3348
3349#if CORO_JIT
3350
3351static void ecb_noinline ecb_cold
3352pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3353{
3354 dSP;
3355 AV *av = newAV ();
3356
3357 av_store (av, 3, newSVuv (d));
3358 av_store (av, 2, newSVuv (c));
3359 av_store (av, 1, newSVuv (b));
3360 av_store (av, 0, newSVuv (a));
3361
3362 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3363
3364 PUTBACK;
3365}
3366
3367static void ecb_noinline ecb_cold
3368jit_init (pTHX)
3369{
3370 dSP;
3371 SV *load, *save;
3372 char *map_base;
3373 char *load_ptr, *save_ptr;
3374 STRLEN load_len, save_len, map_len;
3375 int count;
3376
3377 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3378
3379 PUSHMARK (SP);
3380 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3381 #include "state.h"
3382 count = call_pv ("Coro::State::_jit", G_ARRAY);
3383 SPAGAIN;
3384
3385 save = POPs; save_ptr = SvPVbyte (save, save_len);
3386 load = POPs; load_ptr = SvPVbyte (load, load_len);
3387
3388 map_len = load_len + save_len + 16;
3389
3390 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3391
3392 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3393
3394 load_perl_slots = (load_save_perl_slots_type)map_base;
3395 memcpy (map_base, load_ptr, load_len);
3396
3397 map_base += (load_len + 15) & ~15;
3398
3399 save_perl_slots = (load_save_perl_slots_type)map_base;
3400 memcpy (map_base, save_ptr, save_len);
3401
3402 /* we are good citizens and try to make the page read-only, so the evil evil */
3403 /* hackers might have it a bit more difficult */
3404 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3405
3406 PUTBACK;
3407 eval_pv ("undef &Coro::State::_jit", 1);
3408}
3409
3410#endif
3411
741MODULE = Coro::State PACKAGE = Coro::State 3412MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 3413
743PROTOTYPES: ENABLE 3414PROTOTYPES: DISABLE
744 3415
745BOOT: 3416BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 3417{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3418#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3419# if CORO_PTHREAD
3420 coro_thx = PERL_GET_CONTEXT;
3421# endif
3422#endif
3423 /* perl defines these to check for existance first, but why it doesn't */
3424 /* just create them one at init time is not clear to me, except for */
3425 /* programs trying to delete them, but... */
3426 /* anyway, we declare this as invalid and make sure they are initialised here */
3427 DEFSV;
3428 ERRSV;
3429
3430 cctx_current = cctx_new_empty ();
3431
3432 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3433 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3434
3435 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3436 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3437 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3438
3439 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3440 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3441 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3442
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3443 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 3444
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3445 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3446 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3447 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3448 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 3449
759 main_mainstack = PL_mainstack; 3450 main_mainstack = PL_mainstack;
760} 3451 main_top_env = PL_top_env;
761 3452
762Coro::State 3453 while (main_top_env->je_prev)
763_newprocess(args) 3454 main_top_env = main_top_env->je_prev;
764 SV * args 3455
3456 {
3457 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3458
3459 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3460 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3461
3462 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3463 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3464 }
3465
3466 coroapi.ver = CORO_API_VERSION;
3467 coroapi.rev = CORO_API_REVISION;
3468
3469 coroapi.transfer = api_transfer;
3470
3471 coroapi.sv_state = SvSTATE_;
3472 coroapi.execute_slf = api_execute_slf;
3473 coroapi.prepare_nop = prepare_nop;
3474 coroapi.prepare_schedule = prepare_schedule;
3475 coroapi.prepare_cede = prepare_cede;
3476 coroapi.prepare_cede_notself = prepare_cede_notself;
3477
3478 time_init (aTHX);
3479
3480 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3481#if CORO_JIT
3482 PUTBACK;
3483 jit_init (aTHX);
3484 SPAGAIN;
3485#endif
3486}
3487
3488SV *
3489new (SV *klass, ...)
3490 ALIAS:
3491 Coro::new = 1
3492 CODE:
3493 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3494 OUTPUT:
3495 RETVAL
3496
3497void
3498transfer (...)
3499 PROTOTYPE: $$
3500 CODE:
3501 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3502
3503SV *
3504clone (Coro::State coro)
3505 CODE:
3506{
3507#if CORO_CLONE
3508 struct coro *ncoro = coro_clone (aTHX_ coro);
3509 MAGIC *mg;
3510 /* TODO: too much duplication */
3511 ncoro->hv = newHV ();
3512 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3513 mg->mg_flags |= MGf_DUP;
3514 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3515#else
3516 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3517#endif
3518}
3519 OUTPUT:
3520 RETVAL
3521
3522int
3523cctx_stacksize (int new_stacksize = 0)
3524 PROTOTYPE: ;$
3525 CODE:
3526 RETVAL = cctx_stacksize;
3527 if (new_stacksize)
3528 {
3529 cctx_stacksize = new_stacksize;
3530 ++cctx_gen;
3531 }
3532 OUTPUT:
3533 RETVAL
3534
3535int
3536cctx_max_idle (int max_idle = 0)
3537 PROTOTYPE: ;$
3538 CODE:
3539 RETVAL = cctx_max_idle;
3540 if (max_idle > 1)
3541 cctx_max_idle = max_idle;
3542 OUTPUT:
3543 RETVAL
3544
3545int
3546cctx_count ()
3547 PROTOTYPE:
3548 CODE:
3549 RETVAL = cctx_count;
3550 OUTPUT:
3551 RETVAL
3552
3553int
3554cctx_idle ()
3555 PROTOTYPE:
3556 CODE:
3557 RETVAL = cctx_idle;
3558 OUTPUT:
3559 RETVAL
3560
3561void
3562list ()
3563 PROTOTYPE:
3564 PPCODE:
3565{
3566 struct coro *coro;
3567 for (coro = coro_first; coro; coro = coro->next)
3568 if (coro->hv)
3569 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3570}
3571
3572void
3573call (Coro::State coro, SV *coderef)
3574 ALIAS:
3575 eval = 1
3576 CODE:
3577{
3578 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3579 {
3580 struct coro *current = SvSTATE_current;
3581 struct CoroSLF slf_save;
3582
3583 if (current != coro)
3584 {
3585 PUTBACK;
3586 save_perl (aTHX_ current);
3587 load_perl (aTHX_ coro);
3588 /* the coro is most likely in an active SLF call.
3589 * while not strictly required (the code we execute is
3590 * not allowed to call any SLF functions), it's cleaner
3591 * to reinitialise the slf_frame and restore it later.
3592 * This might one day allow us to actually do SLF calls
3593 * from code executed here.
3594 */
3595 slf_save = slf_frame;
3596 slf_frame.prepare = 0;
3597 SPAGAIN;
3598 }
3599
3600 PUSHSTACK;
3601
3602 PUSHMARK (SP);
3603 PUTBACK;
3604
3605 if (ix)
3606 eval_sv (coderef, 0);
3607 else
3608 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3609
3610 POPSTACK;
3611 SPAGAIN;
3612
3613 if (current != coro)
3614 {
3615 PUTBACK;
3616 slf_frame = slf_save;
3617 save_perl (aTHX_ coro);
3618 load_perl (aTHX_ current);
3619 SPAGAIN;
3620 }
3621 }
3622}
3623
3624SV *
3625is_ready (Coro::State coro)
765 PROTOTYPE: $ 3626 PROTOTYPE: $
3627 ALIAS:
3628 is_ready = CF_READY
3629 is_running = CF_RUNNING
3630 is_new = CF_NEW
3631 is_destroyed = CF_ZOMBIE
3632 is_zombie = CF_ZOMBIE
3633 is_suspended = CF_SUSPENDED
3634 CODE:
3635 RETVAL = boolSV (coro->flags & ix);
3636 OUTPUT:
3637 RETVAL
3638
3639void
3640throw (SV *self, SV *exception = &PL_sv_undef)
3641 PROTOTYPE: $;$
766 CODE: 3642 CODE:
767 Coro__State coro; 3643{
3644 struct coro *coro = SvSTATE (self);
3645 struct coro *current = SvSTATE_current;
3646 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3647 SvREFCNT_dec (*exceptionp);
3648 SvGETMAGIC (exception);
3649 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
768 3650
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3651 api_ready (aTHX_ self);
770 croak ("Coro::State::_newprocess expects an arrayref"); 3652}
3653
3654void
3655api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3656 PROTOTYPE: $;$
3657 C_ARGS: aTHX_ coro, flags
3658
3659SV *
3660has_cctx (Coro::State coro)
3661 PROTOTYPE: $
3662 CODE:
3663 /* maybe manage the running flag differently */
3664 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3665 OUTPUT:
3666 RETVAL
3667
3668int
3669is_traced (Coro::State coro)
3670 PROTOTYPE: $
3671 CODE:
3672 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3673 OUTPUT:
3674 RETVAL
3675
3676UV
3677rss (Coro::State coro)
3678 PROTOTYPE: $
3679 ALIAS:
3680 usecount = 1
3681 CODE:
3682 switch (ix)
3683 {
3684 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3685 case 1: RETVAL = coro->usecount; break;
771 3686 }
772 New (0, coro, 1, struct coro); 3687 OUTPUT:
773
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
775 coro->mainstack = 0; /* actual work is done inside transfer */
776 coro->stack = 0;
777
778 RETVAL = coro; 3688 RETVAL
3689
3690void
3691force_cctx ()
3692 PROTOTYPE:
3693 CODE:
3694 cctx_current->idle_sp = 0;
3695
3696void
3697swap_defsv (Coro::State self)
3698 PROTOTYPE: $
3699 ALIAS:
3700 swap_defav = 1
3701 CODE:
3702 if (!self->slot)
3703 croak ("cannot swap state with coroutine that has no saved state,");
3704 else
3705 {
3706 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3707 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3708
3709 SV *tmp = *src; *src = *dst; *dst = tmp;
3710 }
3711
3712void
3713cancel (Coro::State self)
3714 CODE:
3715 coro_state_destroy (aTHX_ self);
3716
3717SV *
3718enable_times (int enabled = enable_times)
3719 CODE:
3720{
3721 RETVAL = boolSV (enable_times);
3722
3723 if (enabled != enable_times)
3724 {
3725 enable_times = enabled;
3726
3727 coro_times_update ();
3728 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3729 }
3730}
779 OUTPUT: 3731 OUTPUT:
780 RETVAL 3732 RETVAL
781 3733
782void 3734void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 3735times (Coro::State self)
784 Coro::State_or_hashref prev 3736 PPCODE:
785 Coro::State_or_hashref next 3737{
786 int flags 3738 struct coro *current = SvSTATE (coro_current);
787 PROTOTYPE: @ 3739
3740 if (ecb_expect_false (current == self))
3741 {
3742 coro_times_update ();
3743 coro_times_add (SvSTATE (coro_current));
3744 }
3745
3746 EXTEND (SP, 2);
3747 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3748 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3749
3750 if (ecb_expect_false (current == self))
3751 coro_times_sub (SvSTATE (coro_current));
3752}
3753
3754void
3755swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3756 CODE:
3757{
3758 struct coro *current = SvSTATE_current;
3759
3760 if (current == coro)
3761 SWAP_SVS (current);
3762
3763 if (!coro->swap_sv)
3764 coro->swap_sv = newAV ();
3765
3766 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3767 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3768
3769 if (current == coro)
3770 SWAP_SVS (current);
3771}
3772
3773
3774MODULE = Coro::State PACKAGE = Coro
3775
3776BOOT:
3777{
3778 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3779 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3780 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3781 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3782 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3783 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3784 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3785 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3786
3787 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3788 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3789 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3790 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3791
3792 coro_stash = gv_stashpv ("Coro", TRUE);
3793
3794 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3795 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3796 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3797 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3798 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3799 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3800
3801 {
3802 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3803
3804 coroapi.schedule = api_schedule;
3805 coroapi.schedule_to = api_schedule_to;
3806 coroapi.cede = api_cede;
3807 coroapi.cede_notself = api_cede_notself;
3808 coroapi.ready = api_ready;
3809 coroapi.is_ready = api_is_ready;
3810 coroapi.nready = coro_nready;
3811 coroapi.current = coro_current;
3812
3813 /*GCoroAPI = &coroapi;*/
3814 sv_setiv (sv, (IV)&coroapi);
3815 SvREADONLY_on (sv);
3816 }
3817}
3818
3819SV *
3820async (...)
3821 PROTOTYPE: &@
788 CODE: 3822 CODE:
789 transfer (aTHX_ prev, next, flags); 3823 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3824 api_ready (aTHX_ RETVAL);
3825 OUTPUT:
3826 RETVAL
790 3827
791void 3828void
792DESTROY(coro) 3829_destroy (Coro::State coro)
793 Coro::State coro 3830 CODE:
3831 /* used by the manager thread */
3832 coro_state_destroy (aTHX_ coro);
3833
3834void
3835on_destroy (Coro::State coro, SV *cb)
3836 CODE:
3837 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3838
3839void
3840join (...)
3841 CODE:
3842 CORO_EXECUTE_SLF_XS (slf_init_join);
3843
3844void
3845terminate (...)
3846 CODE:
3847 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3848
3849void
3850cancel (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3853
3854int
3855safe_cancel (Coro::State self, ...)
3856 C_ARGS: aTHX_ self, &ST (1), items - 1
3857
3858void
3859schedule (...)
3860 CODE:
3861 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3862
3863void
3864schedule_to (...)
3865 CODE:
3866 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3867
3868void
3869cede_to (...)
3870 CODE:
3871 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3872
3873void
3874cede (...)
3875 CODE:
3876 CORO_EXECUTE_SLF_XS (slf_init_cede);
3877
3878void
3879cede_notself (...)
3880 CODE:
3881 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3882
3883void
3884_set_current (SV *current)
3885 PROTOTYPE: $
3886 CODE:
3887 SvREFCNT_dec (SvRV (coro_current));
3888 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3889
3890void
3891_set_readyhook (SV *hook)
3892 PROTOTYPE: $
794 CODE: 3893 CODE:
795 3894 SvREFCNT_dec (coro_readyhook);
796 if (coro->mainstack && coro->mainstack != main_mainstack) 3895 SvGETMAGIC (hook);
3896 if (SvOK (hook))
3897 {
3898 coro_readyhook = newSVsv (hook);
3899 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3900 }
3901 else
797 { 3902 {
798 struct coro temp; 3903 coro_readyhook = 0;
799 3904 CORO_READYHOOK = 0;
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
801 LOAD(aTHX_ coro);
802
803 destroy_stacks (aTHX);
804
805 LOAD((&temp)); /* this will get rid of defsv etc.. */
806
807 coro->mainstack = 0;
808 } 3905 }
809 3906
810 deallocate_stack (coro); 3907int
3908prio (Coro::State coro, int newprio = 0)
3909 PROTOTYPE: $;$
3910 ALIAS:
3911 nice = 1
3912 CODE:
3913{
3914 RETVAL = coro->prio;
811 3915
812 Safefree (coro); 3916 if (items > 1)
3917 {
3918 if (ix)
3919 newprio = coro->prio - newprio;
3920
3921 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3922 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3923
3924 coro->prio = newprio;
3925 }
3926}
3927 OUTPUT:
3928 RETVAL
3929
3930SV *
3931ready (SV *self)
3932 PROTOTYPE: $
3933 CODE:
3934 RETVAL = boolSV (api_ready (aTHX_ self));
3935 OUTPUT:
3936 RETVAL
3937
3938int
3939nready (...)
3940 PROTOTYPE:
3941 CODE:
3942 RETVAL = coro_nready;
3943 OUTPUT:
3944 RETVAL
813 3945
814void 3946void
815flush() 3947suspend (Coro::State self)
3948 PROTOTYPE: $
816 CODE: 3949 CODE:
817#ifdef MAY_FLUSH 3950 self->flags |= CF_SUSPENDED;
818 flush_padlist_cache ();
819#endif
820
821MODULE = Coro::State PACKAGE = Coro::Cont
822
823# this is slightly dirty
824 3951
825void 3952void
826yield(...) 3953resume (Coro::State self)
3954 PROTOTYPE: $
3955 CODE:
3956 self->flags &= ~CF_SUSPENDED;
3957
3958void
3959_pool_handler (...)
3960 CODE:
3961 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3962
3963void
3964async_pool (SV *cv, ...)
827 PROTOTYPE: @ 3965 PROTOTYPE: &@
3966 PPCODE:
3967{
3968 HV *hv = (HV *)av_pop (av_async_pool);
3969 AV *av = newAV ();
3970 SV *cb = ST (0);
3971 int i;
3972
3973 av_extend (av, items - 2);
3974 for (i = 1; i < items; ++i)
3975 av_push (av, SvREFCNT_inc_NN (ST (i)));
3976
3977 if ((SV *)hv == &PL_sv_undef)
3978 {
3979 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3980 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3981 SvREFCNT_dec (sv);
3982 }
3983
3984 {
3985 struct coro *coro = SvSTATE_hv (hv);
3986
3987 assert (!coro->invoke_cb);
3988 assert (!coro->invoke_av);
3989 coro->invoke_cb = SvREFCNT_inc (cb);
3990 coro->invoke_av = av;
3991 }
3992
3993 api_ready (aTHX_ (SV *)hv);
3994
3995 if (GIMME_V != G_VOID)
3996 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3997 else
3998 SvREFCNT_dec (hv);
3999}
4000
4001SV *
4002rouse_cb ()
4003 PROTOTYPE:
4004 CODE:
4005 RETVAL = coro_new_rouse_cb (aTHX);
4006 OUTPUT:
4007 RETVAL
4008
4009void
4010rouse_wait (...)
4011 PROTOTYPE: ;$
4012 PPCODE:
4013 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4014
4015void
4016on_enter (SV *block)
4017 ALIAS:
4018 on_leave = 1
4019 PROTOTYPE: &
4020 CODE:
4021{
4022 struct coro *coro = SvSTATE_current;
4023 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4024
4025 block = s_get_cv_croak (block);
4026
4027 if (!*avp)
4028 *avp = newAV ();
4029
4030 av_push (*avp, SvREFCNT_inc (block));
4031
4032 if (!ix)
4033 on_enterleave_call (aTHX_ block);
4034
4035 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4036 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4037 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4038}
4039
4040
4041MODULE = Coro::State PACKAGE = PerlIO::cede
4042
4043BOOT:
4044 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4045
4046
4047MODULE = Coro::State PACKAGE = Coro::Semaphore
4048
4049SV *
4050new (SV *klass, SV *count = 0)
4051 CODE:
4052{
4053 int semcnt = 1;
4054
4055 if (count)
4056 {
4057 SvGETMAGIC (count);
4058
4059 if (SvOK (count))
4060 semcnt = SvIV (count);
4061 }
4062
4063 RETVAL = sv_bless (
4064 coro_waitarray_new (aTHX_ semcnt),
4065 GvSTASH (CvGV (cv))
4066 );
4067}
4068 OUTPUT:
4069 RETVAL
4070
4071# helper for Coro::Channel and others
4072SV *
4073_alloc (int count)
4074 CODE:
4075 RETVAL = coro_waitarray_new (aTHX_ count);
4076 OUTPUT:
4077 RETVAL
4078
4079SV *
4080count (SV *self)
4081 CODE:
4082 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087up (SV *self, int adjust = 1)
4088 ALIAS:
4089 adjust = 1
828 CODE: 4090 CODE:
829 static SV *returnstk; 4091 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
830 SV *sv;
831 AV *defav = GvAV (PL_defgv);
832 struct coro *prev, *next;
833 4092
834 if (!returnstk) 4093void
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 4094down (...)
4095 CODE:
4096 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
836 4097
837 /* set up @_ -- ugly */ 4098void
838 av_clear (defav); 4099wait (...)
839 av_fill (defav, items - 1); 4100 CODE:
840 while (items--) 4101 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
841 av_store (defav, items, SvREFCNT_inc (ST(items)));
842 4102
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 4103void
844 sv = av_pop ((AV *)SvRV (returnstk)); 4104try (SV *self)
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 4105 PPCODE:
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 4106{
847 SvREFCNT_dec (sv); 4107 AV *av = (AV *)SvRV (self);
4108 SV *count_sv = AvARRAY (av)[0];
4109 IV count = SvIVX (count_sv);
848 4110
849 transfer(aTHX_ prev, next, 0); 4111 if (count > 0)
4112 {
4113 --count;
4114 SvIVX (count_sv) = count;
4115 XSRETURN_YES;
4116 }
4117 else
4118 XSRETURN_NO;
4119}
850 4120
4121void
4122waiters (SV *self)
4123 PPCODE:
4124{
4125 AV *av = (AV *)SvRV (self);
4126 int wcount = AvFILLp (av) + 1 - 1;
4127
4128 if (GIMME_V == G_SCALAR)
4129 XPUSHs (sv_2mortal (newSViv (wcount)));
4130 else
4131 {
4132 int i;
4133 EXTEND (SP, wcount);
4134 for (i = 1; i <= wcount; ++i)
4135 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4136 }
4137}
4138
4139MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4140
4141void
4142_may_delete (SV *sem, int count, unsigned int extra_refs)
4143 PPCODE:
4144{
4145 AV *av = (AV *)SvRV (sem);
4146
4147 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4148 && AvFILLp (av) == 0 /* no waiters, just count */
4149 && SvIV (AvARRAY (av)[0]) == count)
4150 XSRETURN_YES;
4151
4152 XSRETURN_NO;
4153}
4154
4155MODULE = Coro::State PACKAGE = Coro::Signal
4156
4157SV *
4158new (SV *klass)
4159 CODE:
4160 RETVAL = sv_bless (
4161 coro_waitarray_new (aTHX_ 0),
4162 GvSTASH (CvGV (cv))
4163 );
4164 OUTPUT:
4165 RETVAL
4166
4167void
4168wait (...)
4169 CODE:
4170 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4171
4172void
4173broadcast (SV *self)
4174 CODE:
4175{
4176 AV *av = (AV *)SvRV (self);
4177 coro_signal_wake (aTHX_ av, AvFILLp (av));
4178}
4179
4180void
4181send (SV *self)
4182 CODE:
4183{
4184 AV *av = (AV *)SvRV (self);
4185
4186 if (AvFILLp (av))
4187 coro_signal_wake (aTHX_ av, 1);
4188 else
4189 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4190}
4191
4192IV
4193awaited (SV *self)
4194 CODE:
4195 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4196 OUTPUT:
4197 RETVAL
4198
4199
4200MODULE = Coro::State PACKAGE = Coro::AnyEvent
4201
4202BOOT:
4203 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4204
4205void
4206_schedule (...)
4207 CODE:
4208{
4209 static int incede;
4210
4211 api_cede_notself (aTHX);
4212
4213 ++incede;
4214 while (coro_nready >= incede && api_cede (aTHX))
4215 ;
4216
4217 sv_setsv (sv_activity, &PL_sv_undef);
4218 if (coro_nready >= incede)
4219 {
4220 PUSHMARK (SP);
4221 PUTBACK;
4222 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4223 }
4224
4225 --incede;
4226}
4227
4228
4229MODULE = Coro::State PACKAGE = Coro::AIO
4230
4231void
4232_register (char *target, char *proto, SV *req)
4233 CODE:
4234{
4235 SV *req_cv = s_get_cv_croak (req);
4236 /* newXSproto doesn't return the CV on 5.8 */
4237 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4238 sv_setpv ((SV *)slf_cv, proto);
4239 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4240}
4241
4242MODULE = Coro::State PACKAGE = Coro::Select
4243
4244void
4245patch_pp_sselect ()
4246 CODE:
4247 if (!coro_old_pp_sselect)
4248 {
4249 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4250 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4251 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4252 }
4253
4254void
4255unpatch_pp_sselect ()
4256 CODE:
4257 if (coro_old_pp_sselect)
4258 {
4259 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4260 coro_old_pp_sselect = 0;
4261 }
4262
4263MODULE = Coro::State PACKAGE = Coro::Util
4264
4265void
4266_exit (int code)
4267 CODE:
4268 _exit (code);
4269
4270NV
4271time ()
4272 CODE:
4273 RETVAL = nvtime (aTHX);
4274 OUTPUT:
4275 RETVAL
4276
4277NV
4278gettimeofday ()
4279 PPCODE:
4280{
4281 UV tv [2];
4282 u2time (aTHX_ tv);
4283 EXTEND (SP, 2);
4284 PUSHs (sv_2mortal (newSVuv (tv [0])));
4285 PUSHs (sv_2mortal (newSVuv (tv [1])));
4286}
4287

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