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Comparing Coro/Coro/State.xs (file contents):
Revision 1.68 by root, Mon Dec 12 20:28:30 2005 UTC vs.
Revision 1.403 by root, Sun May 22 20:13:33 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#include <stddef.h>
12# ifndef PL_ppaddr 19#include <stdio.h>
13# define PL_ppaddr ppaddr 20#include <errno.h>
14# endif 21#include <assert.h>
15# ifndef call_sv 22
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST 23#ifndef SVs_PADSTALE
28# define IS_PADCONST(v) 0 24# define SVs_PADSTALE 0
29# endif
30#endif 25#endif
31 26
32#include <signal.h> 27#if defined(_WIN32)
28# undef HAS_GETTIMEOFDAY
29# undef setjmp
30# undef longjmp
31# undef _exit
32# define setjmp _setjmp /* deep magic */
33#else
34# include <inttypes.h> /* most portable stdint.h */
35#endif
33 36
34#ifdef HAVE_MMAP 37#ifdef HAVE_MMAP
35# include <unistd.h> 38# include <unistd.h>
36# include <sys/mman.h> 39# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 40# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 42# define MAP_ANONYMOUS MAP_ANON
40# else 43# else
41# undef HAVE_MMAP 44# undef HAVE_MMAP
42# endif 45# endif
43# endif 46# endif
47# include <limits.h>
48# ifndef PAGESIZE
49# define PAGESIZE pagesize
50# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
51static long pagesize;
52# else
53# define BOOT_PAGESIZE (void)0
54# endif
55#else
56# define PAGESIZE 0
57# define BOOT_PAGESIZE (void)0
44#endif 58#endif
45 59
46#define SUB_INIT "Coro::State::initialize" 60#if CORO_USE_VALGRIND
47#define UCORO_STATE "_coro_state" 61# include <valgrind/valgrind.h>
62#endif
48 63
49/* The next macro should declare a variable stacklevel that contains and approximation 64/* the maximum number of idle cctx that will be pooled */
50 * to the current C stack pointer. Its property is that it changes with each call 65static int cctx_max_idle = 4;
51 * and should be unique. */ 66
67#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
68# undef CORO_STACKGUARD
69#endif
70
71#ifndef CORO_STACKGUARD
72# define CORO_STACKGUARD 0
73#endif
74
75/* prefer perl internal functions over our own? */
76#ifndef CORO_PREFER_PERL_FUNCTIONS
77# define CORO_PREFER_PERL_FUNCTIONS 0
78#endif
79
80/* The next macros try to return the current stack pointer, in an as
81 * portable way as possible. */
82#if __GNUC__ >= 4
83# define dSTACKLEVEL int stacklevel_dummy
84# define STACKLEVEL __builtin_frame_address (0)
85#else
86# define dSTACKLEVEL volatile void *stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 87# define STACKLEVEL ((void *)&stacklevel)
88#endif
53 89
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 90#define IN_DESTRUCT PL_dirty
55 91
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 92#if __GNUC__ >= 3
93# define attribute(x) __attribute__(x)
94# define expect(expr,value) __builtin_expect ((expr), (value))
95# define INLINE static inline
96#else
97# define attribute(x)
98# define expect(expr,value) (expr)
99# define INLINE static
100#endif
101
102#define expect_false(expr) expect ((expr) != 0, 0)
103#define expect_true(expr) expect ((expr) != 0, 1)
104
105#define NOINLINE attribute ((noinline))
57 106
58#include "CoroAPI.h" 107#include "CoroAPI.h"
108#define GCoroAPI (&coroapi) /* very sneaky */
59 109
60#ifdef USE_ITHREADS 110#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 111# if CORO_PTHREAD
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 112static void *coro_thx;
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 113# endif
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif 114#endif
68 115
116#ifdef __linux
117# include <time.h> /* for timespec */
118# include <syscall.h> /* for SYS_* */
119# ifdef SYS_clock_gettime
120# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
121# define CORO_CLOCK_MONOTONIC 1
122# define CORO_CLOCK_THREAD_CPUTIME_ID 3
123# endif
124#endif
125
126static double (*nvtime)(); /* so why doesn't it take void? */
127static void (*u2time)(pTHX_ UV ret[2]);
128
129/* we hijack an hopefully unused CV flag for our purposes */
130#define CVf_SLF 0x4000
131static OP *pp_slf (pTHX);
132static void slf_destroy (pTHX_ struct coro *coro);
133
134static U32 cctx_gen;
135static size_t cctx_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 136static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 137static AV *main_mainstack; /* used to differentiate between $main and others */
138static JMPENV *main_top_env;
71static HV *coro_state_stash; 139static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 140static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 141
76/* this is actually not only the c stack but also c registers etc... */ 142static AV *av_destroy; /* destruction queue */
143static SV *sv_manager; /* the manager coro */
144static SV *sv_idle; /* $Coro::idle */
145
146static GV *irsgv; /* $/ */
147static GV *stdoutgv; /* *STDOUT */
148static SV *rv_diehook;
149static SV *rv_warnhook;
150static HV *hv_sig; /* %SIG */
151
152/* async_pool helper stuff */
153static SV *sv_pool_rss;
154static SV *sv_pool_size;
155static SV *sv_async_pool_idle; /* description string */
156static AV *av_async_pool; /* idle pool */
157static SV *sv_Coro; /* class string */
158static CV *cv_pool_handler;
159
160/* Coro::AnyEvent */
161static SV *sv_activity;
162
163/* enable processtime/realtime profiling */
164static char enable_times;
165typedef U32 coro_ts[2];
166static coro_ts time_real, time_cpu;
167static char times_valid;
168
169static struct coro_cctx *cctx_first;
170static int cctx_count, cctx_idle;
171
172enum
173{
174 CC_MAPPED = 0x01,
175 CC_NOREUSE = 0x02, /* throw this away after tracing */
176 CC_TRACE = 0x04,
177 CC_TRACE_SUB = 0x08, /* trace sub calls */
178 CC_TRACE_LINE = 0x10, /* trace each statement */
179 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
180};
181
182/* this is a structure representing a c-level coroutine */
77typedef struct { 183typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 184{
79 int usecnt; /* shared by how many coroutines */ 185 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 186
187 /* the stack */
188 void *sptr;
189 size_t ssize;
190
191 /* cpu state */
192 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
193 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
194 JMPENV *top_env;
82 coro_context cctx; 195 coro_context cctx;
83 196
84 void *sptr; 197 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 198#if CORO_USE_VALGRIND
86} coro_stack; 199 int valgrind_id;
200#endif
201 unsigned char flags;
202} coro_cctx;
87 203
88struct coro { 204static coro_cctx *cctx_current; /* the currently running cctx */
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */
90 JMPENV start_env;
91 205
92 /* the optional C context */ 206/*****************************************************************************/
93 coro_stack *stack;
94 void *cursp;
95 int gencnt;
96 207
97 /* optionally saved, might be zero */ 208static MGVTBL coro_state_vtbl;
209
210enum
211{
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
216 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
217 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
218};
219
220/* the structure where most of the perl state is stored, overlaid on the cxstack */
221typedef struct
222{
223 SV *defsv;
98 AV *defav; 224 AV *defav;
99 SV *defsv;
100 SV *errsv; 225 SV *errsv;
101 226 SV *irsgv;
102 /* saved global state not related to stacks */ 227 HV *hinthv;
103 U8 dowarn; 228#define VAR(name,type) type name;
104 I32 in_eval; 229# include "state.h"
230#undef VAR
231} perl_slots;
105 232
106 /* the stacks and related info (callchain etc..) */ 233// how many context stack entries do we need for perl_slots
107 PERL_SI *curstackinfo; 234#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
108 AV *curstack; 235
236/* this is a structure representing a perl-level coroutine */
237struct coro
238{
239 /* the C coroutine allocated to this perl coroutine, if any */
240 coro_cctx *cctx;
241
242 /* ready queue */
243 struct coro *next_ready;
244
245 /* state data */
246 struct CoroSLF slf_frame; /* saved slf frame */
109 AV *mainstack; 247 AV *mainstack;
110 SV **stack_sp; 248 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 249
250 CV *startcv; /* the CV to execute */
137 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
138 AV *args; 252 int flags; /* CF_ flags */
253 HV *hv; /* the perl hash associated with this coro, if any */
254
255 /* statistics */
256 int usecount; /* number of transfers to this coro */
257
258 /* coro process data */
259 int prio;
260 SV *except; /* exception to be thrown */
261 SV *rouse_cb; /* last rouse callback */
262 AV *on_destroy; /* callbacks or coros to notify on destroy */
263 AV *status; /* the exit status list */
264
265 /* async_pool */
266 SV *saved_deffh;
267 SV *invoke_cb;
268 AV *invoke_av;
269
270 /* on_enter/on_leave */
271 AV *on_enter;
272 AV *on_leave;
273
274 /* swap_sv */
275 AV *swap_sv;
276
277 /* times */
278 coro_ts t_cpu, t_real;
279
280 /* linked list */
281 struct coro *next, *prev;
139}; 282};
140 283
141typedef struct coro *Coro__State; 284typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 285typedef struct coro *Coro__State_or_hashref;
143 286
144/* mostly copied from op.c:cv_clone2 */ 287/* the following variables are effectively part of the perl context */
145STATIC AV * 288/* and get copied between struct coro and these variables */
146clone_padlist (pTHX_ AV *protopadlist) 289/* the main reason we don't support windows process emulation */
290static struct CoroSLF slf_frame; /* the current slf frame */
291
292/** Coro ********************************************************************/
293
294#define CORO_PRIO_MAX 3
295#define CORO_PRIO_HIGH 1
296#define CORO_PRIO_NORMAL 0
297#define CORO_PRIO_LOW -1
298#define CORO_PRIO_IDLE -3
299#define CORO_PRIO_MIN -4
300
301/* for Coro.pm */
302static SV *coro_current;
303static SV *coro_readyhook;
304static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
305static CV *cv_coro_run;
306static struct coro *coro_first;
307#define coro_nready coroapi.nready
308
309/** Coro::Select ************************************************************/
310
311static OP *(*coro_old_pp_sselect) (pTHX);
312static SV *coro_select_select;
313
314/* horrible hack, but if it works... */
315static OP *
316coro_pp_sselect (pTHX)
147{ 317{
148 AV *av; 318 dSP;
149 I32 ix; 319 PUSHMARK (SP - 4); /* fake argument list */
150 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 320 XPUSHs (coro_select_select);
151 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 321 PUTBACK;
152 SV **pname = AvARRAY (protopad_name); 322
153 SV **ppad = AvARRAY (protopad); 323 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
154 I32 fname = AvFILLp (protopad_name); 324 PL_op->op_flags |= OPf_STACKED;
155 I32 fpad = AvFILLp (protopad); 325 PL_op->op_private = 0;
326 return PL_ppaddr [OP_ENTERSUB](aTHX);
327}
328
329/** time stuff **************************************************************/
330
331#ifdef HAS_GETTIMEOFDAY
332
333static void
334coro_u2time (pTHX_ UV ret[2])
335{
336 struct timeval tv;
337 gettimeofday (&tv, 0);
338
339 ret [0] = tv.tv_sec;
340 ret [1] = tv.tv_usec;
341}
342
343static double
344coro_nvtime ()
345{
346 struct timeval tv;
347 gettimeofday (&tv, 0);
348
349 return tv.tv_sec + tv.tv_usec * 1e-6;
350}
351
352static void
353time_init (pTHX)
354{
355 nvtime = coro_nvtime;
356 u2time = coro_u2time;
357}
358
359#else
360
361static void
362time_init (pTHX)
363{
364 SV **svp;
365
366 require_pv ("Time/HiRes.pm");
367
368 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
369
370 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
371 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
372
373 nvtime = INT2PTR (double (*)(), SvIV (*svp));
374
375 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
376 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
377}
378
379#endif
380
381/** lowlevel stuff **********************************************************/
382
383static SV *
384coro_get_sv (pTHX_ const char *name, int create)
385{
386#if PERL_VERSION_ATLEAST (5,10,0)
387 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
388 get_sv (name, create);
389#endif
390 return get_sv (name, create);
391}
392
393static AV *
394coro_get_av (pTHX_ const char *name, int create)
395{
396#if PERL_VERSION_ATLEAST (5,10,0)
397 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
398 get_av (name, create);
399#endif
400 return get_av (name, create);
401}
402
403static HV *
404coro_get_hv (pTHX_ const char *name, int create)
405{
406#if PERL_VERSION_ATLEAST (5,10,0)
407 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
408 get_hv (name, create);
409#endif
410 return get_hv (name, create);
411}
412
413INLINE void
414coro_times_update ()
415{
416#ifdef coro_clock_gettime
417 struct timespec ts;
418
419 ts.tv_sec = ts.tv_nsec = 0;
420 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
421 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
422
423 ts.tv_sec = ts.tv_nsec = 0;
424 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
425 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
426#else
427 dTHX;
428 UV tv[2];
429
430 u2time (aTHX_ tv);
431 time_real [0] = tv [0];
432 time_real [1] = tv [1] * 1000;
433#endif
434}
435
436INLINE void
437coro_times_add (struct coro *c)
438{
439 c->t_real [1] += time_real [1];
440 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
441 c->t_real [0] += time_real [0];
442
443 c->t_cpu [1] += time_cpu [1];
444 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
445 c->t_cpu [0] += time_cpu [0];
446}
447
448INLINE void
449coro_times_sub (struct coro *c)
450{
451 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
452 c->t_real [1] -= time_real [1];
453 c->t_real [0] -= time_real [0];
454
455 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
456 c->t_cpu [1] -= time_cpu [1];
457 c->t_cpu [0] -= time_cpu [0];
458}
459
460/*****************************************************************************/
461/* magic glue */
462
463#define CORO_MAGIC_type_cv 26
464#define CORO_MAGIC_type_state PERL_MAGIC_ext
465
466#define CORO_MAGIC_NN(sv, type) \
467 (expect_true (SvMAGIC (sv)->mg_type == type) \
468 ? SvMAGIC (sv) \
469 : mg_find (sv, type))
470
471#define CORO_MAGIC(sv, type) \
472 (expect_true (SvMAGIC (sv)) \
473 ? CORO_MAGIC_NN (sv, type) \
474 : 0)
475
476#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
477#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
478
479INLINE MAGIC *
480SvSTATEhv_p (pTHX_ SV *coro)
481{
482 MAGIC *mg;
483
484 if (expect_true (
485 SvTYPE (coro) == SVt_PVHV
486 && (mg = CORO_MAGIC_state (coro))
487 && mg->mg_virtual == &coro_state_vtbl
488 ))
489 return mg;
490
491 return 0;
492}
493
494INLINE struct coro *
495SvSTATE_ (pTHX_ SV *coro)
496{
497 MAGIC *mg;
498
499 if (SvROK (coro))
500 coro = SvRV (coro);
501
502 mg = SvSTATEhv_p (aTHX_ coro);
503 if (!mg)
504 croak ("Coro::State object required");
505
506 return (struct coro *)mg->mg_ptr;
507}
508
509#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
510
511/* faster than SvSTATE, but expects a coroutine hv */
512#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
513#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
514
515/*****************************************************************************/
516/* padlist management and caching */
517
518static AV *
519coro_derive_padlist (pTHX_ CV *cv)
520{
521 AV *padlist = CvPADLIST (cv);
156 AV *newpadlist, *newpad_name, *newpad; 522 AV *newpadlist, *newpad;
157 SV **npad;
158
159 newpad_name = newAV ();
160 for (ix = fname; ix >= 0; ix--)
161 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163 newpad = newAV ();
164 av_fill (newpad, AvFILLp (protopad));
165 npad = AvARRAY (newpad);
166 523
167 newpadlist = newAV (); 524 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 525 AvREAL_off (newpadlist);
169 av_store (newpadlist, 0, (SV *) newpad_name); 526#if PERL_VERSION_ATLEAST (5,10,0)
527 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
528#else
529 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
530#endif
531 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
532 --AvFILLp (padlist);
533
534 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
170 av_store (newpadlist, 1, (SV *) newpad); 535 av_store (newpadlist, 1, (SV *)newpad);
171 536
172 av = newAV (); /* will be @_ */ 537 return newpadlist;
173 av_extend (av, 0); 538}
174 av_store (newpad, 0, (SV *) av);
175 AvFLAGS (av) = AVf_REIFY;
176 539
177 for (ix = fpad; ix > 0; ix--) 540static void
541free_padlist (pTHX_ AV *padlist)
542{
543 /* may be during global destruction */
544 if (!IN_DESTRUCT)
178 { 545 {
179 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 546 I32 i = AvFILLp (padlist);
180 547
181 if (namesv && namesv != &PL_sv_undef) 548 while (i > 0) /* special-case index 0 */
182 { 549 {
183 char *name = SvPVX (namesv); /* XXX */ 550 /* we try to be extra-careful here */
551 AV *av = (AV *)AvARRAY (padlist)[i--];
552 I32 j = AvFILLp (av);
184 553
185 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 554 while (j >= 0)
186 { /* lexical from outside? */ 555 SvREFCNT_dec (AvARRAY (av)[j--]);
187 npad[ix] = SvREFCNT_inc (ppad[ix]);
188 }
189 else
190 { /* our own lexical */
191 SV *sv;
192 if (*name == '&')
193 sv = SvREFCNT_inc (ppad[ix]);
194 else if (*name == '@')
195 sv = (SV *) newAV ();
196 else if (*name == '%')
197 sv = (SV *) newHV ();
198 else
199 sv = NEWSV (0, 0);
200 556
201#ifdef SvPADBUSY 557 AvFILLp (av) = -1;
202 if (!SvPADBUSY (sv)) 558 SvREFCNT_dec (av);
203#endif
204 SvPADMY_on (sv);
205
206 npad[ix] = sv;
207 }
208 } 559 }
209 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210 {
211 npad[ix] = SvREFCNT_inc (ppad[ix]);
212 }
213 else
214 {
215 SV *sv = NEWSV (0, 0);
216 SvPADTMP_on (sv);
217 npad[ix] = sv;
218 }
219 }
220 560
221#if 0 /* return -ENOTUNDERSTOOD */ 561 SvREFCNT_dec (AvARRAY (padlist)[0]);
222 /* Now that vars are all in place, clone nested closures. */
223 562
224 for (ix = fpad; ix > 0; ix--) {
225 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226 if (namesv
227 && namesv != &PL_sv_undef
228 && !(SvFLAGS(namesv) & SVf_FAKE)
229 && *SvPVX(namesv) == '&'
230 && CvCLONE(ppad[ix]))
231 {
232 CV *kid = cv_clone((CV*)ppad[ix]);
233 SvREFCNT_dec(ppad[ix]);
234 CvCLONE_on(kid);
235 SvPADMY_on(kid);
236 npad[ix] = (SV*)kid;
237 }
238 }
239#endif
240
241 return newpadlist;
242}
243
244STATIC void
245free_padlist (pTHX_ AV *padlist)
246{
247 /* may be during global destruction */
248 if (SvREFCNT (padlist))
249 {
250 I32 i = AvFILLp (padlist); 563 AvFILLp (padlist) = -1;
251 while (i >= 0)
252 {
253 SV **svp = av_fetch (padlist, i--, FALSE);
254 if (svp)
255 {
256 SV *sv;
257 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
258 SvREFCNT_dec (sv);
259
260 SvREFCNT_dec (*svp);
261 }
262 }
263
264 SvREFCNT_dec ((SV*)padlist); 564 SvREFCNT_dec ((SV*)padlist);
265 } 565 }
266} 566}
267 567
268STATIC int 568static int
269coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 569coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270{ 570{
271 AV *padlist; 571 AV *padlist;
272 AV *av = (AV *)mg->mg_obj; 572 AV *av = (AV *)mg->mg_obj;
573
574 /* perl manages to free our internal AV and _then_ call us */
575 if (IN_DESTRUCT)
576 return 0;
273 577
274 /* casting is fun. */ 578 /* casting is fun. */
275 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 579 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276 free_padlist (aTHX_ padlist); 580 free_padlist (aTHX_ padlist);
277 581
278 SvREFCNT_dec (av); 582 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
279}
280 583
281#define PERL_MAGIC_coro PERL_MAGIC_ext 584 return 0;
585}
282 586
283static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 587static MGVTBL coro_cv_vtbl = {
588 0, 0, 0, 0,
589 coro_cv_free
590};
284 591
285/* the next two functions merely cache the padlists */ 592/* the next two functions merely cache the padlists */
286STATIC void 593static void
287get_padlist (pTHX_ CV *cv) 594get_padlist (pTHX_ CV *cv)
288{ 595{
289 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 596 MAGIC *mg = CORO_MAGIC_cv (cv);
597 AV *av;
290 598
291 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 599 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 600 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293 else 601 else
602 {
603#if CORO_PREFER_PERL_FUNCTIONS
604 /* this is probably cleaner? but also slower! */
605 /* in practise, it seems to be less stable */
606 CV *cp = Perl_cv_clone (aTHX_ cv);
607 CvPADLIST (cv) = CvPADLIST (cp);
608 CvPADLIST (cp) = 0;
609 SvREFCNT_dec (cp);
610#else
294 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 611 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
612#endif
613 }
295} 614}
296 615
297STATIC void 616static void
298put_padlist (pTHX_ CV *cv) 617put_padlist (pTHX_ CV *cv)
299{ 618{
300 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 619 MAGIC *mg = CORO_MAGIC_cv (cv);
620 AV *av;
301 621
302 if (!mg) 622 if (expect_false (!mg))
623 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
624
625 av = (AV *)mg->mg_obj;
626
627 if (expect_false (AvFILLp (av) >= AvMAX (av)))
628 av_extend (av, AvFILLp (av) + 1);
629
630 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
631}
632
633/** load & save, init *******************************************************/
634
635/* swap sv heads, at least logically */
636static void
637swap_svs (pTHX_ Coro__State c)
638{
639 int i;
640
641 for (i = 0; i <= AvFILLp (c->swap_sv); )
642 {
643 SV *a = AvARRAY (c->swap_sv)[i++];
644 SV *b = AvARRAY (c->swap_sv)[i++];
645
646 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
647 SV tmp;
648
649 /* swap sv_any */
650 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
651
652 /* swap sv_flags */
653 SvFLAGS (&tmp) = SvFLAGS (a);
654 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
655 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
656
657#if PERL_VERSION_ATLEAST (5,10,0)
658 /* perl 5.10 complicates this _quite_ a bit, but it also is
659 * much faster, so no quarrels here. alternatively, we could
660 * sv_upgrade to avoid this.
661 */
303 { 662 {
304 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 663 /* swap sv_u */
305 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 664 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
306 mg->mg_virtual = &vtbl_coro; 665
307 mg->mg_obj = (SV *)newAV (); 666 /* if SvANY points to the head, we need to adjust the pointers,
667 * as the pointer for a still points to b, and maybe vice versa.
668 */
669 #define svany_in_head(type) \
670 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
671
672 if (svany_in_head (SvTYPE (a)))
673 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
674
675 if (svany_in_head (SvTYPE (b)))
676 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
308 } 677 }
309 678#endif
310 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 679 }
311} 680}
312 681
313#define SB do { 682#define SWAP_SVS(coro) \
314#define SE } while (0) 683 if (expect_false ((coro)->swap_sv)) \
684 swap_svs (aTHX_ (coro))
315 685
316#define LOAD(state) load_state(aTHX_ (state));
317#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
318
319#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
320
321static void 686static void
687on_enterleave_call (pTHX_ SV *cb);
688
689static void
322load_state(pTHX_ Coro__State c) 690load_perl (pTHX_ Coro__State c)
323{ 691{
324 PL_dowarn = c->dowarn; 692 perl_slots *slot = c->slot;
325 PL_in_eval = c->in_eval; 693 c->slot = 0;
326 694
327 PL_curstackinfo = c->curstackinfo;
328 PL_curstack = c->curstack;
329 PL_mainstack = c->mainstack; 695 PL_mainstack = c->mainstack;
330 PL_stack_sp = c->stack_sp;
331 PL_op = c->op;
332 PL_curpad = c->curpad;
333 PL_comppad = c->comppad;
334 PL_compcv = c->compcv;
335 PL_stack_base = c->stack_base;
336 PL_stack_max = c->stack_max;
337 PL_tmps_stack = c->tmps_stack;
338 PL_tmps_floor = c->tmps_floor;
339 PL_tmps_ix = c->tmps_ix;
340 PL_tmps_max = c->tmps_max;
341 PL_markstack = c->markstack;
342 PL_markstack_ptr = c->markstack_ptr;
343 PL_markstack_max = c->markstack_max;
344 PL_scopestack = c->scopestack;
345 PL_scopestack_ix = c->scopestack_ix;
346 PL_scopestack_max = c->scopestack_max;
347 PL_savestack = c->savestack;
348 PL_savestack_ix = c->savestack_ix;
349 PL_savestack_max = c->savestack_max;
350 PL_retstack = c->retstack;
351 PL_retstack_ix = c->retstack_ix;
352 PL_retstack_max = c->retstack_max;
353 PL_curpm = c->curpm;
354 PL_curcop = c->curcop;
355 PL_top_env = c->top_env;
356 696
357 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 697 GvSV (PL_defgv) = slot->defsv;
358 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 698 GvAV (PL_defgv) = slot->defav;
359 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 699 GvSV (PL_errgv) = slot->errsv;
700 GvSV (irsgv) = slot->irsgv;
701 GvHV (PL_hintgv) = slot->hinthv;
702
703 #define VAR(name,type) PL_ ## name = slot->name;
704 # include "state.h"
705 #undef VAR
360 706
361 { 707 {
362 dSP; 708 dSP;
709
363 CV *cv; 710 CV *cv;
364 711
365 /* now do the ugly restore mess */ 712 /* now do the ugly restore mess */
366 while ((cv = (CV *)POPs)) 713 while (expect_true (cv = (CV *)POPs))
367 { 714 {
368 AV *padlist = (AV *)POPs;
369
370 if (padlist)
371 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */ 715 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvPADLIST(cv) = padlist; 716 CvDEPTH (cv) = PTR2IV (POPs);
374 } 717 CvPADLIST (cv) = (AV *)POPs;
375
376 ++CvDEPTH(cv);
377 } 718 }
378 719
379 PUTBACK; 720 PUTBACK;
380 } 721 }
381}
382 722
723 slf_frame = c->slf_frame;
724 CORO_THROW = c->except;
725
726 if (expect_false (enable_times))
727 {
728 if (expect_false (!times_valid))
729 coro_times_update ();
730
731 coro_times_sub (c);
732 }
733
734 if (expect_false (c->on_enter))
735 {
736 int i;
737
738 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
739 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
740 }
741
742 SWAP_SVS (c);
743}
744
383static void 745static void
384save_state(pTHX_ Coro__State c, int flags) 746save_perl (pTHX_ Coro__State c)
385{ 747{
748 SWAP_SVS (c);
749
750 if (expect_false (c->on_leave))
751 {
752 int i;
753
754 for (i = AvFILLp (c->on_leave); i >= 0; --i)
755 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
756 }
757
758 times_valid = 0;
759
760 if (expect_false (enable_times))
761 {
762 coro_times_update (); times_valid = 1;
763 coro_times_add (c);
764 }
765
766 c->except = CORO_THROW;
767 c->slf_frame = slf_frame;
768
386 { 769 {
387 dSP; 770 dSP;
388 I32 cxix = cxstack_ix; 771 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack; 772 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo; 773 PERL_SI *top_si = PL_curstackinfo;
… …
392 /* 775 /*
393 * the worst thing you can imagine happens first - we have to save 776 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :( 777 * (and reinitialize) all cv's in the whole callchain :(
395 */ 778 */
396 779
397 PUSHs (Nullsv); 780 XPUSHs (Nullsv);
398 /* this loop was inspired by pp_caller */ 781 /* this loop was inspired by pp_caller */
399 for (;;) 782 for (;;)
400 { 783 {
401 while (cxix >= 0) 784 while (expect_true (cxix >= 0))
402 { 785 {
403 PERL_CONTEXT *cx = &ccstk[cxix--]; 786 PERL_CONTEXT *cx = &ccstk[cxix--];
404 787
405 if (CxTYPE(cx) == CXt_SUB) 788 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
406 { 789 {
407 CV *cv = cx->blk_sub.cv; 790 CV *cv = cx->blk_sub.cv;
791
408 if (CvDEPTH(cv)) 792 if (expect_true (CvDEPTH (cv)))
409 { 793 {
410 EXTEND (SP, CvDEPTH(cv)*2); 794 EXTEND (SP, 3);
411
412 while (--CvDEPTH(cv))
413 {
414 /* this tells the restore code to increment CvDEPTH */
415 PUSHs (Nullsv);
416 PUSHs ((SV *)cv);
417 }
418
419 PUSHs ((SV *)CvPADLIST(cv)); 795 PUSHs ((SV *)CvPADLIST (cv));
796 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
420 PUSHs ((SV *)cv); 797 PUSHs ((SV *)cv);
421 798
799 CvDEPTH (cv) = 0;
422 get_padlist (aTHX_ cv); /* this is a monster */ 800 get_padlist (aTHX_ cv);
423 } 801 }
424 } 802 }
425#ifdef CXt_FORMAT
426 else if (CxTYPE(cx) == CXt_FORMAT)
427 {
428 /* I never used formats, so how should I know how these are implemented? */
429 /* my bold guess is as a simple, plain sub... */
430 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
431 }
432#endif
433 } 803 }
434 804
435 if (top_si->si_type == PERLSI_MAIN) 805 if (expect_true (top_si->si_type == PERLSI_MAIN))
436 break; 806 break;
437 807
438 top_si = top_si->si_prev; 808 top_si = top_si->si_prev;
439 ccstk = top_si->si_cxstack; 809 ccstk = top_si->si_cxstack;
440 cxix = top_si->si_cxix; 810 cxix = top_si->si_cxix;
441 } 811 }
442 812
443 PUTBACK; 813 PUTBACK;
444 } 814 }
445 815
446 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 816 /* allocate some space on the context stack for our purposes */
447 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 817 if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
448 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 818 {
819 unsigned int i;
449 820
450 c->dowarn = PL_dowarn; 821 for (i = 0; i < SLOT_COUNT; ++i)
451 c->in_eval = PL_in_eval; 822 CXINC;
452 823
453 c->curstackinfo = PL_curstackinfo; 824 cxstack_ix -= SLOT_COUNT; /* undo allocation */
454 c->curstack = PL_curstack; 825 }
826
455 c->mainstack = PL_mainstack; 827 c->mainstack = PL_mainstack;
456 c->stack_sp = PL_stack_sp; 828
457 c->op = PL_op; 829 {
458 c->curpad = PL_curpad; 830 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
459 c->comppad = PL_comppad; 831
460 c->compcv = PL_compcv; 832 slot->defav = GvAV (PL_defgv);
461 c->stack_base = PL_stack_base; 833 slot->defsv = DEFSV;
462 c->stack_max = PL_stack_max; 834 slot->errsv = ERRSV;
463 c->tmps_stack = PL_tmps_stack; 835 slot->irsgv = GvSV (irsgv);
464 c->tmps_floor = PL_tmps_floor; 836 slot->hinthv = GvHV (PL_hintgv);
465 c->tmps_ix = PL_tmps_ix; 837
466 c->tmps_max = PL_tmps_max; 838 #define VAR(name,type) slot->name = PL_ ## name;
467 c->markstack = PL_markstack; 839 # include "state.h"
468 c->markstack_ptr = PL_markstack_ptr; 840 #undef VAR
469 c->markstack_max = PL_markstack_max; 841 }
470 c->scopestack = PL_scopestack;
471 c->scopestack_ix = PL_scopestack_ix;
472 c->scopestack_max = PL_scopestack_max;
473 c->savestack = PL_savestack;
474 c->savestack_ix = PL_savestack_ix;
475 c->savestack_max = PL_savestack_max;
476 c->retstack = PL_retstack;
477 c->retstack_ix = PL_retstack_ix;
478 c->retstack_max = PL_retstack_max;
479 c->curpm = PL_curpm;
480 c->curcop = PL_curcop;
481 c->top_env = PL_top_env;
482} 842}
483 843
484/* 844/*
485 * allocate various perl stacks. This is an exact copy 845 * allocate various perl stacks. This is almost an exact copy
486 * of perl.c:init_stacks, except that it uses less memory 846 * of perl.c:init_stacks, except that it uses less memory
487 * on the (sometimes correct) assumption that coroutines do 847 * on the (sometimes correct) assumption that coroutines do
488 * not usually need a lot of stackspace. 848 * not usually need a lot of stackspace.
489 */ 849 */
490STATIC void 850#if CORO_PREFER_PERL_FUNCTIONS
851# define coro_init_stacks(thx) init_stacks ()
852#else
853static void
491coro_init_stacks (pTHX) 854coro_init_stacks (pTHX)
492{ 855{
493 LOCK; 856 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
494
495 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496 PL_curstackinfo->si_type = PERLSI_MAIN; 857 PL_curstackinfo->si_type = PERLSI_MAIN;
497 PL_curstack = PL_curstackinfo->si_stack; 858 PL_curstack = PL_curstackinfo->si_stack;
498 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 859 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499 860
500 PL_stack_base = AvARRAY(PL_curstack); 861 PL_stack_base = AvARRAY(PL_curstack);
501 PL_stack_sp = PL_stack_base; 862 PL_stack_sp = PL_stack_base;
502 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 863 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503 864
504 New(50,PL_tmps_stack,96,SV*); 865 New(50,PL_tmps_stack,32,SV*);
505 PL_tmps_floor = -1; 866 PL_tmps_floor = -1;
506 PL_tmps_ix = -1; 867 PL_tmps_ix = -1;
507 PL_tmps_max = 96; 868 PL_tmps_max = 32;
508 869
509 New(54,PL_markstack,16,I32); 870 New(54,PL_markstack,16,I32);
510 PL_markstack_ptr = PL_markstack; 871 PL_markstack_ptr = PL_markstack;
511 PL_markstack_max = PL_markstack + 16; 872 PL_markstack_max = PL_markstack + 16;
512 873
513#ifdef SET_MARK_OFFSET 874#ifdef SET_MARK_OFFSET
514 SET_MARK_OFFSET; 875 SET_MARK_OFFSET;
515#endif 876#endif
516 877
517 New(54,PL_scopestack,16,I32); 878 New(54,PL_scopestack,8,I32);
518 PL_scopestack_ix = 0; 879 PL_scopestack_ix = 0;
519 PL_scopestack_max = 16; 880 PL_scopestack_max = 8;
520 881
521 New(54,PL_savestack,96,ANY); 882 New(54,PL_savestack,24,ANY);
522 PL_savestack_ix = 0; 883 PL_savestack_ix = 0;
523 PL_savestack_max = 96; 884 PL_savestack_max = 24;
524 885
886#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,8,OP*); 887 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 888 PL_retstack_ix = 0;
527 PL_retstack_max = 8; 889 PL_retstack_max = 4;
528 890#endif
529 UNLOCK;
530} 891}
892#endif
531 893
532/* 894/*
533 * destroy the stacks, the callchain etc... 895 * destroy the stacks, the callchain etc...
534 */ 896 */
535STATIC void 897static void
536destroy_stacks(pTHX) 898coro_destruct_stacks (pTHX)
537{ 899{
538 if (!IN_DESTRUCT)
539 {
540 /* is this ugly, I ask? */
541 LEAVE_SCOPE (0);
542
543 /* sure it is, but more important: is it correct?? :/ */
544 FREETMPS;
545
546 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
547 }
548
549 while (PL_curstackinfo->si_next) 900 while (PL_curstackinfo->si_next)
550 PL_curstackinfo = PL_curstackinfo->si_next; 901 PL_curstackinfo = PL_curstackinfo->si_next;
551 902
552 while (PL_curstackinfo) 903 while (PL_curstackinfo)
553 { 904 {
554 PERL_SI *p = PL_curstackinfo->si_prev; 905 PERL_SI *p = PL_curstackinfo->si_prev;
555 906
556 { /*D*//*remove*/
557 dSP;
558 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
559 PUTBACK; /* possibly superfluous */
560 }
561
562 if (!IN_DESTRUCT) 907 if (!IN_DESTRUCT)
563 {
564 dounwind (-1);/*D*//*remove*/
565 SvREFCNT_dec (PL_curstackinfo->si_stack); 908 SvREFCNT_dec (PL_curstackinfo->si_stack);
566 }
567 909
568 Safefree (PL_curstackinfo->si_cxstack); 910 Safefree (PL_curstackinfo->si_cxstack);
569 Safefree (PL_curstackinfo); 911 Safefree (PL_curstackinfo);
570 PL_curstackinfo = p; 912 PL_curstackinfo = p;
571 } 913 }
572 914
573 Safefree (PL_tmps_stack); 915 Safefree (PL_tmps_stack);
574 Safefree (PL_markstack); 916 Safefree (PL_markstack);
575 Safefree (PL_scopestack); 917 Safefree (PL_scopestack);
576 Safefree (PL_savestack); 918 Safefree (PL_savestack);
919#if !PERL_VERSION_ATLEAST (5,10,0)
577 Safefree (PL_retstack); 920 Safefree (PL_retstack);
578}
579
580static void
581allocate_stack (Coro__State ctx, int alloc)
582{
583 coro_stack *stack;
584
585 New (0, stack, 1, coro_stack);
586
587 stack->refcnt = 1;
588 stack->usecnt = 1;
589 stack->gencnt = ctx->gencnt = 0;
590
591 if (alloc)
592 {
593#if HAVE_MMAP
594 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
595 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596 if (stack->sptr == (void *)-1)
597#endif 921#endif
922}
923
924#define CORO_RSS \
925 rss += sizeof (SYM (curstackinfo)); \
926 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
927 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
928 rss += SYM (tmps_max) * sizeof (SV *); \
929 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
930 rss += SYM (scopestack_max) * sizeof (I32); \
931 rss += SYM (savestack_max) * sizeof (ANY);
932
933static size_t
934coro_rss (pTHX_ struct coro *coro)
935{
936 size_t rss = sizeof (*coro);
937
938 if (coro->mainstack)
939 {
940 if (coro->flags & CF_RUNNING)
598 { 941 {
599 /*FIXME*//*D*//* reasonable stack size! */ 942 #define SYM(sym) PL_ ## sym
600 stack->ssize = - (STACKSIZE * sizeof (long)); 943 CORO_RSS;
601 New (0, stack->sptr, STACKSIZE, long); 944 #undef SYM
602 } 945 }
603 }
604 else 946 else
605 stack->sptr = 0;
606
607 ctx->stack = stack;
608}
609
610static void
611deallocate_stack (Coro__State ctx)
612{
613 coro_stack *stack = ctx->stack;
614
615 ctx->stack = 0;
616
617 if (stack)
618 {
619 if (!--stack->refcnt)
620 { 947 {
621#ifdef HAVE_MMAP 948 #define SYM(sym) coro->slot->sym
622 if (stack->ssize > 0 && stack->sptr) 949 CORO_RSS;
623 munmap (stack->sptr, stack->ssize); 950 #undef SYM
624 else 951 }
952 }
953
954 return rss;
955}
956
957/** coroutine stack handling ************************************************/
958
959static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
960static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
961static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
962
963/* apparently < 5.8.8 */
964#ifndef MgPV_nolen_const
965#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
966 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
967 (const char*)(mg)->mg_ptr)
625#endif 968#endif
626 Safefree (stack->sptr);
627 969
628 Safefree (stack); 970/*
971 * This overrides the default magic get method of %SIG elements.
972 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
973 * and instead of trying to save and restore the hash elements (extremely slow),
974 * we just provide our own readback here.
975 */
976static int
977coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
978{
979 const char *s = MgPV_nolen_const (mg);
980
981 if (*s == '_')
982 {
983 SV **svp = 0;
984
985 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
986 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
987
988 if (svp)
989 {
990 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
991 return 0;
629 } 992 }
630 else if (ctx->gencnt == stack->gencnt) 993 }
631 --stack->usecnt; 994
995 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
996}
997
998static int
999coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1000{
1001 const char *s = MgPV_nolen_const (mg);
1002
1003 if (*s == '_')
632 } 1004 {
633} 1005 SV **svp = 0;
634 1006
1007 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1008 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1009
1010 if (svp)
1011 {
1012 SV *old = *svp;
1013 *svp = 0;
1014 SvREFCNT_dec (old);
1015 return 0;
1016 }
1017 }
1018
1019 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1020}
1021
635static void 1022static int
636setup_coro (void *arg) 1023coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1024{
1025 const char *s = MgPV_nolen_const (mg);
1026
1027 if (*s == '_')
1028 {
1029 SV **svp = 0;
1030
1031 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1032 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1033
1034 if (svp)
1035 {
1036 SV *old = *svp;
1037 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1038 SvREFCNT_dec (old);
1039 return 0;
1040 }
1041 }
1042
1043 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1044}
1045
1046static void
1047prepare_nop (pTHX_ struct coro_transfer_args *ta)
1048{
1049 /* kind of mega-hacky, but works */
1050 ta->next = ta->prev = (struct coro *)ta;
1051}
1052
1053static int
1054slf_check_nop (pTHX_ struct CoroSLF *frame)
1055{
1056 return 0;
1057}
1058
1059static int
1060slf_check_repeat (pTHX_ struct CoroSLF *frame)
1061{
1062 return 1;
1063}
1064
1065static UNOP init_perl_op;
1066
1067static void NOINLINE /* noinline to keep it out of the transfer fast path */
1068init_perl (pTHX_ struct coro *coro)
637{ 1069{
638 /* 1070 /*
639 * emulate part of the perl startup here. 1071 * emulate part of the perl startup here.
640 */ 1072 */
1073 coro_init_stacks (aTHX);
1074
1075 PL_runops = RUNOPS_DEFAULT;
1076 PL_curcop = &PL_compiling;
1077 PL_in_eval = EVAL_NULL;
1078 PL_comppad = 0;
1079 PL_comppad_name = 0;
1080 PL_comppad_name_fill = 0;
1081 PL_comppad_name_floor = 0;
1082 PL_curpm = 0;
1083 PL_curpad = 0;
1084 PL_localizing = 0;
1085 PL_restartop = 0;
1086#if PERL_VERSION_ATLEAST (5,10,0)
1087 PL_parser = 0;
1088#endif
1089 PL_hints = 0;
1090
1091 /* recreate the die/warn hooks */
1092 PL_diehook = SvREFCNT_inc (rv_diehook);
1093 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1094
1095 GvSV (PL_defgv) = newSV (0);
1096 GvAV (PL_defgv) = coro->args; coro->args = 0;
1097 GvSV (PL_errgv) = newSV (0);
1098 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1099 GvHV (PL_hintgv) = 0;
1100 PL_rs = newSVsv (GvSV (irsgv));
1101 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1102
1103 {
1104 dSP;
1105 UNOP myop;
1106
1107 Zero (&myop, 1, UNOP);
1108 myop.op_next = Nullop;
1109 myop.op_type = OP_ENTERSUB;
1110 myop.op_flags = OPf_WANT_VOID;
1111
1112 PUSHMARK (SP);
1113 PUSHs ((SV *)coro->startcv);
1114 PUTBACK;
1115 PL_op = (OP *)&myop;
1116 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1117 }
1118
1119 /* this newly created coroutine might be run on an existing cctx which most
1120 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1121 */
1122 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1123 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1124 slf_frame.destroy = 0;
1125
1126 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1127 init_perl_op.op_next = PL_op;
1128 init_perl_op.op_type = OP_ENTERSUB;
1129 init_perl_op.op_ppaddr = pp_slf;
1130 /* no flags etc. required, as an init function won't be called */
1131
1132 PL_op = (OP *)&init_perl_op;
1133
1134 /* copy throw, in case it was set before init_perl */
1135 CORO_THROW = coro->except;
1136
1137 SWAP_SVS (coro);
1138
1139 if (expect_false (enable_times))
1140 {
1141 coro_times_update ();
1142 coro_times_sub (coro);
1143 }
1144}
1145
1146static void
1147coro_unwind_stacks (pTHX)
1148{
1149 if (!IN_DESTRUCT)
1150 {
1151 /* restore all saved variables and stuff */
1152 LEAVE_SCOPE (0);
1153 assert (PL_tmps_floor == -1);
1154
1155 /* free all temporaries */
1156 FREETMPS;
1157 assert (PL_tmps_ix == -1);
1158
1159 /* unwind all extra stacks */
1160 POPSTACK_TO (PL_mainstack);
1161
1162 /* unwind main stack */
1163 dounwind (-1);
1164 }
1165}
1166
1167static void
1168destroy_perl (pTHX_ struct coro *coro)
1169{
1170 SV *svf [9];
1171
1172 {
1173 SV *old_current = SvRV (coro_current);
1174 struct coro *current = SvSTATE (old_current);
1175
1176 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1177
1178 save_perl (aTHX_ current);
1179
1180 /* this will cause transfer_check to croak on block*/
1181 SvRV_set (coro_current, (SV *)coro->hv);
1182
1183 load_perl (aTHX_ coro);
1184
1185 coro_unwind_stacks (aTHX);
1186
1187 /* restore swapped sv's */
1188 SWAP_SVS (coro);
1189
1190 coro_destruct_stacks (aTHX);
1191
1192 // now save some sv's to be free'd later
1193 svf [0] = GvSV (PL_defgv);
1194 svf [1] = (SV *)GvAV (PL_defgv);
1195 svf [2] = GvSV (PL_errgv);
1196 svf [3] = (SV *)PL_defoutgv;
1197 svf [4] = PL_rs;
1198 svf [5] = GvSV (irsgv);
1199 svf [6] = (SV *)GvHV (PL_hintgv);
1200 svf [7] = PL_diehook;
1201 svf [8] = PL_warnhook;
1202 assert (9 == sizeof (svf) / sizeof (*svf));
1203
1204 SvRV_set (coro_current, old_current);
1205
1206 load_perl (aTHX_ current);
1207 }
1208
1209 {
1210 unsigned int i;
1211
1212 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1213 SvREFCNT_dec (svf [i]);
1214
1215 SvREFCNT_dec (coro->saved_deffh);
1216 SvREFCNT_dec (coro->rouse_cb);
1217 SvREFCNT_dec (coro->invoke_cb);
1218 SvREFCNT_dec (coro->invoke_av);
1219 }
1220}
1221
1222INLINE void
1223free_coro_mortal (pTHX)
1224{
1225 if (expect_true (coro_mortal))
1226 {
1227 SvREFCNT_dec ((SV *)coro_mortal);
1228 coro_mortal = 0;
1229 }
1230}
1231
1232static int
1233runops_trace (pTHX)
1234{
1235 COP *oldcop = 0;
1236 int oldcxix = -2;
1237
1238 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1239 {
1240 PERL_ASYNC_CHECK ();
1241
1242 if (cctx_current->flags & CC_TRACE_ALL)
1243 {
1244 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1245 {
1246 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1247 SV **bot, **top;
1248 AV *av = newAV (); /* return values */
1249 SV **cb;
1250 dSP;
1251
1252 GV *gv = CvGV (cx->blk_sub.cv);
1253 SV *fullname = sv_2mortal (newSV (0));
1254 if (isGV (gv))
1255 gv_efullname3 (fullname, gv, 0);
1256
1257 bot = PL_stack_base + cx->blk_oldsp + 1;
1258 top = cx->blk_gimme == G_ARRAY ? SP + 1
1259 : cx->blk_gimme == G_SCALAR ? bot + 1
1260 : bot;
1261
1262 av_extend (av, top - bot);
1263 while (bot < top)
1264 av_push (av, SvREFCNT_inc_NN (*bot++));
1265
1266 PL_runops = RUNOPS_DEFAULT;
1267 ENTER;
1268 SAVETMPS;
1269 EXTEND (SP, 3);
1270 PUSHMARK (SP);
1271 PUSHs (&PL_sv_no);
1272 PUSHs (fullname);
1273 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1274 PUTBACK;
1275 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1276 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1277 SPAGAIN;
1278 FREETMPS;
1279 LEAVE;
1280 PL_runops = runops_trace;
1281 }
1282
1283 if (oldcop != PL_curcop)
1284 {
1285 oldcop = PL_curcop;
1286
1287 if (PL_curcop != &PL_compiling)
1288 {
1289 SV **cb;
1290
1291 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1292 {
1293 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1294
1295 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1296 {
1297 dSP;
1298 GV *gv = CvGV (cx->blk_sub.cv);
1299 SV *fullname = sv_2mortal (newSV (0));
1300
1301 if (isGV (gv))
1302 gv_efullname3 (fullname, gv, 0);
1303
1304 PL_runops = RUNOPS_DEFAULT;
1305 ENTER;
1306 SAVETMPS;
1307 EXTEND (SP, 3);
1308 PUSHMARK (SP);
1309 PUSHs (&PL_sv_yes);
1310 PUSHs (fullname);
1311 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1312 PUTBACK;
1313 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1314 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1315 SPAGAIN;
1316 FREETMPS;
1317 LEAVE;
1318 PL_runops = runops_trace;
1319 }
1320
1321 oldcxix = cxstack_ix;
1322 }
1323
1324 if (cctx_current->flags & CC_TRACE_LINE)
1325 {
1326 dSP;
1327
1328 PL_runops = RUNOPS_DEFAULT;
1329 ENTER;
1330 SAVETMPS;
1331 EXTEND (SP, 3);
1332 PL_runops = RUNOPS_DEFAULT;
1333 PUSHMARK (SP);
1334 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1335 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1336 PUTBACK;
1337 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1338 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1339 SPAGAIN;
1340 FREETMPS;
1341 LEAVE;
1342 PL_runops = runops_trace;
1343 }
1344 }
1345 }
1346 }
1347 }
1348
1349 TAINT_NOT;
1350 return 0;
1351}
1352
1353static struct CoroSLF cctx_ssl_frame;
1354
1355static void
1356slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1357{
1358 ta->prev = 0;
1359}
1360
1361static int
1362slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1363{
1364 *frame = cctx_ssl_frame;
1365
1366 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1367}
1368
1369/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1370static void NOINLINE
1371cctx_prepare (pTHX)
1372{
1373 PL_top_env = &PL_start_env;
1374
1375 if (cctx_current->flags & CC_TRACE)
1376 PL_runops = runops_trace;
1377
1378 /* we already must be executing an SLF op, there is no other valid way
1379 * that can lead to creation of a new cctx */
1380 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1381 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1382
1383 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1384 cctx_ssl_frame = slf_frame;
1385
1386 slf_frame.prepare = slf_prepare_set_stacklevel;
1387 slf_frame.check = slf_check_set_stacklevel;
1388}
1389
1390/* the tail of transfer: execute stuff we can only do after a transfer */
1391INLINE void
1392transfer_tail (pTHX)
1393{
1394 free_coro_mortal (aTHX);
1395}
1396
1397/*
1398 * this is a _very_ stripped down perl interpreter ;)
1399 */
1400static void
1401cctx_run (void *arg)
1402{
1403#ifdef USE_ITHREADS
1404# if CORO_PTHREAD
1405 PERL_SET_CONTEXT (coro_thx);
1406# endif
1407#endif
1408 {
1409 dTHX;
1410
1411 /* normally we would need to skip the entersub here */
1412 /* not doing so will re-execute it, which is exactly what we want */
1413 /* PL_nop = PL_nop->op_next */
1414
1415 /* inject a fake subroutine call to cctx_init */
1416 cctx_prepare (aTHX);
1417
1418 /* cctx_run is the alternative tail of transfer() */
1419 transfer_tail (aTHX);
1420
1421 /* somebody or something will hit me for both perl_run and PL_restartop */
1422 PL_restartop = PL_op;
1423 perl_run (PL_curinterp);
1424 /*
1425 * Unfortunately, there is no way to get at the return values of the
1426 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1427 * runtime errors here, as this is just a random interpreter, not a thread.
1428 */
1429
1430 /*
1431 * If perl-run returns we assume exit() was being called or the coro
1432 * fell off the end, which seems to be the only valid (non-bug)
1433 * reason for perl_run to return. We try to exit by jumping to the
1434 * bootstrap-time "top" top_env, as we cannot restore the "main"
1435 * coroutine as Coro has no such concept.
1436 * This actually isn't valid with the pthread backend, but OSes requiring
1437 * that backend are too broken to do it in a standards-compliant way.
1438 */
1439 PL_top_env = main_top_env;
1440 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1441 }
1442}
1443
1444static coro_cctx *
1445cctx_new ()
1446{
1447 coro_cctx *cctx;
1448
1449 ++cctx_count;
1450 New (0, cctx, 1, coro_cctx);
1451
1452 cctx->gen = cctx_gen;
1453 cctx->flags = 0;
1454 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1455
1456 return cctx;
1457}
1458
1459/* create a new cctx only suitable as source */
1460static coro_cctx *
1461cctx_new_empty ()
1462{
1463 coro_cctx *cctx = cctx_new ();
1464
1465 cctx->sptr = 0;
1466 coro_create (&cctx->cctx, 0, 0, 0, 0);
1467
1468 return cctx;
1469}
1470
1471/* create a new cctx suitable as destination/running a perl interpreter */
1472static coro_cctx *
1473cctx_new_run ()
1474{
1475 coro_cctx *cctx = cctx_new ();
1476 void *stack_start;
1477 size_t stack_size;
1478
1479#if HAVE_MMAP
1480 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1481 /* mmap supposedly does allocate-on-write for us */
1482 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1483
1484 if (cctx->sptr != (void *)-1)
1485 {
1486 #if CORO_STACKGUARD
1487 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1488 #endif
1489 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1490 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1491 cctx->flags |= CC_MAPPED;
1492 }
1493 else
1494#endif
1495 {
1496 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1497 New (0, cctx->sptr, cctx_stacksize, long);
1498
1499 if (!cctx->sptr)
1500 {
1501 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1502 _exit (EXIT_FAILURE);
1503 }
1504
1505 stack_start = cctx->sptr;
1506 stack_size = cctx->ssize;
1507 }
1508
1509 #if CORO_USE_VALGRIND
1510 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1511 #endif
1512
1513 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1514
1515 return cctx;
1516}
1517
1518static void
1519cctx_destroy (coro_cctx *cctx)
1520{
1521 if (!cctx)
1522 return;
1523
1524 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1525
1526 --cctx_count;
1527 coro_destroy (&cctx->cctx);
1528
1529 /* coro_transfer creates new, empty cctx's */
1530 if (cctx->sptr)
1531 {
1532 #if CORO_USE_VALGRIND
1533 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1534 #endif
1535
1536#if HAVE_MMAP
1537 if (cctx->flags & CC_MAPPED)
1538 munmap (cctx->sptr, cctx->ssize);
1539 else
1540#endif
1541 Safefree (cctx->sptr);
1542 }
1543
1544 Safefree (cctx);
1545}
1546
1547/* wether this cctx should be destructed */
1548#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1549
1550static coro_cctx *
1551cctx_get (pTHX)
1552{
1553 while (expect_true (cctx_first))
1554 {
1555 coro_cctx *cctx = cctx_first;
1556 cctx_first = cctx->next;
1557 --cctx_idle;
1558
1559 if (expect_true (!CCTX_EXPIRED (cctx)))
1560 return cctx;
1561
1562 cctx_destroy (cctx);
1563 }
1564
1565 return cctx_new_run ();
1566}
1567
1568static void
1569cctx_put (coro_cctx *cctx)
1570{
1571 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1572
1573 /* free another cctx if overlimit */
1574 if (expect_false (cctx_idle >= cctx_max_idle))
1575 {
1576 coro_cctx *first = cctx_first;
1577 cctx_first = first->next;
1578 --cctx_idle;
1579
1580 cctx_destroy (first);
1581 }
1582
1583 ++cctx_idle;
1584 cctx->next = cctx_first;
1585 cctx_first = cctx;
1586}
1587
1588/** coroutine switching *****************************************************/
1589
1590static void
1591transfer_check (pTHX_ struct coro *prev, struct coro *next)
1592{
1593 /* TODO: throwing up here is considered harmful */
1594
1595 if (expect_true (prev != next))
1596 {
1597 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1598 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1599
1600 if (expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1601 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1602
1603#if !PERL_VERSION_ATLEAST (5,10,0)
1604 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1605 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1606#endif
1607 }
1608}
1609
1610/* always use the TRANSFER macro */
1611static void NOINLINE /* noinline so we have a fixed stackframe */
1612transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1613{
1614 dSTACKLEVEL;
1615
1616 /* sometimes transfer is only called to set idle_sp */
1617 if (expect_false (!prev))
1618 {
1619 cctx_current->idle_sp = STACKLEVEL;
1620 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1621 }
1622 else if (expect_true (prev != next))
1623 {
1624 coro_cctx *cctx_prev;
1625
1626 if (expect_false (prev->flags & CF_NEW))
1627 {
1628 /* create a new empty/source context */
1629 prev->flags &= ~CF_NEW;
1630 prev->flags |= CF_RUNNING;
1631 }
1632
1633 prev->flags &= ~CF_RUNNING;
1634 next->flags |= CF_RUNNING;
1635
1636 /* first get rid of the old state */
1637 save_perl (aTHX_ prev);
1638
1639 if (expect_false (next->flags & CF_NEW))
1640 {
1641 /* need to start coroutine */
1642 next->flags &= ~CF_NEW;
1643 /* setup coroutine call */
1644 init_perl (aTHX_ next);
1645 }
1646 else
1647 load_perl (aTHX_ next);
1648
1649 /* possibly untie and reuse the cctx */
1650 if (expect_true (
1651 cctx_current->idle_sp == STACKLEVEL
1652 && !(cctx_current->flags & CC_TRACE)
1653 && !force_cctx
1654 ))
1655 {
1656 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1657 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1658
1659 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1660 /* without this the next cctx_get might destroy the running cctx while still in use */
1661 if (expect_false (CCTX_EXPIRED (cctx_current)))
1662 if (expect_true (!next->cctx))
1663 next->cctx = cctx_get (aTHX);
1664
1665 cctx_put (cctx_current);
1666 }
1667 else
1668 prev->cctx = cctx_current;
1669
1670 ++next->usecount;
1671
1672 cctx_prev = cctx_current;
1673 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1674
1675 next->cctx = 0;
1676
1677 if (expect_false (cctx_prev != cctx_current))
1678 {
1679 cctx_prev->top_env = PL_top_env;
1680 PL_top_env = cctx_current->top_env;
1681 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1682 }
1683
1684 transfer_tail (aTHX);
1685 }
1686}
1687
1688#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1689#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1690
1691/** high level stuff ********************************************************/
1692
1693/* this function is actually Coro, not Coro::State, but we call it from here */
1694/* because it is convenient - but it hasn't been declared yet for that reason */
1695static void
1696coro_call_on_destroy (pTHX_ struct coro *coro);
1697
1698static void
1699coro_state_destroy (pTHX_ struct coro *coro)
1700{
1701 if (coro->flags & CF_ZOMBIE)
1702 return;
1703
1704 slf_destroy (aTHX_ coro);
1705
1706 coro->flags |= CF_ZOMBIE;
1707
1708 if (coro->flags & CF_READY)
1709 {
1710 /* reduce nready, as destroying a ready coro effectively unreadies it */
1711 /* alternative: look through all ready queues and remove the coro */
1712 --coro_nready;
1713 }
1714 else
1715 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1716
1717 if (coro->next) coro->next->prev = coro->prev;
1718 if (coro->prev) coro->prev->next = coro->next;
1719 if (coro == coro_first) coro_first = coro->next;
1720
1721 if (coro->mainstack
1722 && coro->mainstack != main_mainstack
1723 && coro->slot
1724 && !PL_dirty)
1725 destroy_perl (aTHX_ coro);
1726
1727 cctx_destroy (coro->cctx);
1728 SvREFCNT_dec (coro->startcv);
1729 SvREFCNT_dec (coro->args);
1730 SvREFCNT_dec (coro->swap_sv);
1731 SvREFCNT_dec (CORO_THROW);
1732
1733 coro_call_on_destroy (aTHX_ coro);
1734
1735 /* more destruction mayhem in coro_state_free */
1736}
1737
1738static int
1739coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1740{
1741 struct coro *coro = (struct coro *)mg->mg_ptr;
1742 mg->mg_ptr = 0;
1743
1744 coro_state_destroy (aTHX_ coro);
1745 SvREFCNT_dec (coro->on_destroy);
1746 SvREFCNT_dec (coro->status);
1747
1748 Safefree (coro);
1749
1750 return 0;
1751}
1752
1753static int
1754coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1755{
1756 /* called when perl clones the current process the slow way (windows process emulation) */
1757 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1758 mg->mg_ptr = 0;
1759 mg->mg_virtual = 0;
1760
1761 return 0;
1762}
1763
1764static MGVTBL coro_state_vtbl = {
1765 0, 0, 0, 0,
1766 coro_state_free,
1767 0,
1768#ifdef MGf_DUP
1769 coro_state_dup,
1770#else
1771# define MGf_DUP 0
1772#endif
1773};
1774
1775static void
1776prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1777{
1778 ta->prev = SvSTATE (prev_sv);
1779 ta->next = SvSTATE (next_sv);
1780 TRANSFER_CHECK (*ta);
1781}
1782
1783static void
1784api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1785{
1786 struct coro_transfer_args ta;
1787
1788 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1789 TRANSFER (ta, 1);
1790}
1791
1792/** Coro ********************************************************************/
1793
1794INLINE void
1795coro_enq (pTHX_ struct coro *coro)
1796{
1797 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1798
1799 SvREFCNT_inc_NN (coro->hv);
1800
1801 coro->next_ready = 0;
1802 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1803 ready [1] = coro;
1804}
1805
1806INLINE struct coro *
1807coro_deq (pTHX)
1808{
1809 int prio;
1810
1811 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1812 {
1813 struct coro **ready = coro_ready [prio];
1814
1815 if (ready [0])
1816 {
1817 struct coro *coro = ready [0];
1818 ready [0] = coro->next_ready;
1819 return coro;
1820 }
1821 }
1822
1823 return 0;
1824}
1825
1826static void
1827invoke_sv_ready_hook_helper (void)
1828{
641 dTHX; 1829 dTHX;
642 dSP; 1830 dSP;
643 Coro__State ctx = (Coro__State)arg;
644 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645 1831
646 coro_init_stacks (aTHX); 1832 ENTER;
647 /*PL_curcop = 0;*/ 1833 SAVETMPS;
648 /*PL_in_eval = PL_in_eval;*/ /* inherit */
649 SvREFCNT_dec (GvAV (PL_defgv));
650 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
651 1834
652 SPAGAIN;
653
654 if (ctx->stack)
655 {
656 ctx->cursp = 0;
657
658 PUSHMARK(SP); 1835 PUSHMARK (SP);
659 PUTBACK; 1836 PUTBACK;
660 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1837 call_sv (coro_readyhook, G_VOID | G_DISCARD);
661 1838
662 if (SvTRUE (ERRSV)) 1839 FREETMPS;
663 croak (NULL); 1840 LEAVE;
664 else 1841}
665 croak ("FATAL: CCTXT coroutine returned!"); 1842
1843static int
1844api_ready (pTHX_ SV *coro_sv)
1845{
1846 struct coro *coro = SvSTATE (coro_sv);
1847
1848 if (coro->flags & CF_READY)
1849 return 0;
1850
1851 coro->flags |= CF_READY;
1852
1853 coro_enq (aTHX_ coro);
1854
1855 if (!coro_nready++)
1856 if (coroapi.readyhook)
1857 coroapi.readyhook ();
1858
1859 return 1;
1860}
1861
1862static int
1863api_is_ready (pTHX_ SV *coro_sv)
1864{
1865 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1866}
1867
1868/* expects to own a reference to next->hv */
1869INLINE void
1870prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1871{
1872 SV *prev_sv = SvRV (coro_current);
1873
1874 ta->prev = SvSTATE_hv (prev_sv);
1875 ta->next = next;
1876
1877 TRANSFER_CHECK (*ta);
1878
1879 SvRV_set (coro_current, (SV *)next->hv);
1880
1881 free_coro_mortal (aTHX);
1882 coro_mortal = prev_sv;
1883}
1884
1885static void
1886prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1887{
1888 for (;;)
666 } 1889 {
667 else 1890 struct coro *next = coro_deq (aTHX);
668 {
669 UNOP myop;
670 1891
671 PL_op = (OP *)&myop; 1892 if (expect_true (next))
672
673 Zero(&myop, 1, UNOP);
674 myop.op_next = Nullop;
675 myop.op_flags = OPf_WANT_VOID;
676
677 PUSHMARK(SP);
678 XPUSHs (sub_init);
679 /*
680 * the next line is slightly wrong, as PL_op->op_next
681 * is actually being executed so we skip the first op.
682 * that doesn't matter, though, since it is only
683 * pp_nextstate and we never return...
684 * ah yes, and I don't care anyways ;)
685 */
686 PUTBACK;
687 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688 SPAGAIN;
689
690 ENTER; /* necessary e.g. for dounwind */
691 }
692}
693
694static void
695continue_coro (void *arg)
696{
697 /*
698 * this is a _very_ stripped down perl interpreter ;)
699 */
700 dTHX;
701 Coro__State ctx = (Coro__State)arg;
702 JMPENV coro_start_env;
703
704 PL_top_env = &ctx->start_env;
705
706 ctx->cursp = 0;
707 PL_op = PL_op->op_next;
708 CALLRUNOPS(aTHX);
709
710 abort ();
711}
712
713STATIC void
714transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
715{
716 dSTACKLEVEL;
717
718 if (prev != next)
719 {
720 if (next->mainstack)
721 { 1893 {
722 LOCK; 1894 /* cannot transfer to destroyed coros, skip and look for next */
723 SAVE (prev, flags); 1895 if (expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
724 LOAD (next); 1896 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
725 UNLOCK; 1897 else
726
727 /* mark this state as in-use */
728 next->mainstack = 0;
729 next->tmps_ix = -2;
730
731 /* stacklevel changed? if yes, grab the stack for us! */
732 if (flags & TRANSFER_SAVE_CCTXT)
733 { 1898 {
734 if (!prev->stack) 1899 next->flags &= ~CF_READY;
735 allocate_stack (prev, 0); 1900 --coro_nready;
736 else if (prev->cursp != stacklevel 1901
737 && prev->stack->usecnt > 1) 1902 prepare_schedule_to (aTHX_ ta, next);
738 { 1903 break;
739 prev->gencnt = ++prev->stack->gencnt;
740 prev->stack->usecnt = 1;
741 }
742
743 /* has our stack been invalidated? */
744 if (next->stack && next->stack->gencnt != next->gencnt)
745 {
746 deallocate_stack (next);
747 allocate_stack (next, 1);
748 coro_create (&(next->stack->cctx),
749 continue_coro, (void *)next,
750 next->stack->sptr, labs (next->stack->ssize));
751 }
752
753 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
754 prev->cursp = stacklevel;
755 /* don't add any code here */
756 } 1904 }
757 else
758 next->cursp = stacklevel;
759 } 1905 }
760 else if (next->tmps_ix == -2)
761 croak ("tried to transfer to running coroutine");
762 else 1906 else
763 { 1907 {
764 LOCK; 1908 /* nothing to schedule: call the idle handler */
765 SAVE (prev, -1); /* first get rid of the old state */ 1909 if (SvROK (sv_idle)
766 UNLOCK; 1910 && SvOBJECT (SvRV (sv_idle)))
767
768 if (flags & TRANSFER_SAVE_CCTXT)
769 { 1911 {
770 if (!prev->stack) 1912 if (SvRV (sv_idle) == SvRV (coro_current))
771 allocate_stack (prev, 0); 1913 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
772 1914
773 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1915 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
774 { 1916 api_ready (aTHX_ SvRV (sv_idle));
775 PL_top_env = &next->start_env; 1917 --coro_nready;
776
777 setup_coro (next);
778 next->cursp = stacklevel;
779
780 prev->stack->refcnt++;
781 prev->stack->usecnt++;
782 next->stack = prev->stack;
783 next->gencnt = prev->gencnt;
784 }
785 else
786 {
787 assert (!next->stack);
788 allocate_stack (next, 1);
789 coro_create (&(next->stack->cctx),
790 setup_coro, (void *)next,
791 next->stack->sptr, labs (next->stack->ssize));
792 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793 prev->cursp = stacklevel;
794 /* don't add any code here */
795 }
796 } 1918 }
797 else 1919 else
798 { 1920 {
799 setup_coro (next); 1921 /* TODO: deprecated, remove, cannot work reliably *//*D*/
800 next->cursp = stacklevel; 1922 dSP;
1923
1924 ENTER;
1925 SAVETMPS;
1926
1927 PUSHMARK (SP);
1928 PUTBACK;
1929 call_sv (sv_idle, G_VOID | G_DISCARD);
1930
1931 FREETMPS;
1932 LEAVE;
801 } 1933 }
802 } 1934 }
803 } 1935 }
1936}
804 1937
805 LOCK; 1938INLINE void
1939prepare_cede (pTHX_ struct coro_transfer_args *ta)
1940{
1941 api_ready (aTHX_ coro_current);
1942 prepare_schedule (aTHX_ ta);
1943}
1944
1945INLINE void
1946prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1947{
1948 SV *prev = SvRV (coro_current);
1949
806 if (coro_mortal) 1950 if (coro_nready)
807 {
808 SvREFCNT_dec (coro_mortal);
809 coro_mortal = 0;
810 } 1951 {
811 UNLOCK; 1952 prepare_schedule (aTHX_ ta);
812} 1953 api_ready (aTHX_ prev);
813
814#define SV_CORO(sv,func) \
815 do { \
816 if (SvROK (sv)) \
817 sv = SvRV (sv); \
818 \
819 if (SvTYPE (sv) == SVt_PVHV) \
820 { \
821 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822 \
823 if (!he) \
824 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825 \
826 (sv) = SvRV (HeVAL(he)); \
827 } \
828 \
829 /* must also be changed inside Coro::Cont::yield */ \
830 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832 \
833 } while(0)
834
835#define SvSTATE(sv) (struct coro *)SvIV (sv)
836
837static void
838api_transfer(pTHX_ SV *prev, SV *next, int flags)
839{
840 SV_CORO (prev, "Coro::transfer");
841 SV_CORO (next, "Coro::transfer");
842
843 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
844}
845
846/** Coro ********************************************************************/
847
848#define PRIO_MAX 3
849#define PRIO_HIGH 1
850#define PRIO_NORMAL 0
851#define PRIO_LOW -1
852#define PRIO_IDLE -3
853#define PRIO_MIN -4
854
855/* for Coro.pm */
856static GV *coro_current, *coro_idle;
857static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
858static int coro_nready;
859
860static void
861coro_enq (pTHX_ SV *sv)
862{
863 if (SvTYPE (sv) == SVt_PVHV)
864 { 1954 }
865 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1955 else
866 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1956 prepare_nop (aTHX_ ta);
1957}
867 1958
868 prio = prio > PRIO_MAX ? PRIO_MAX 1959static void
869 : prio < PRIO_MIN ? PRIO_MIN 1960api_schedule (pTHX)
870 : prio; 1961{
1962 struct coro_transfer_args ta;
871 1963
872 av_push (coro_ready [prio - PRIO_MIN], sv); 1964 prepare_schedule (aTHX_ &ta);
873 coro_nready++; 1965 TRANSFER (ta, 1);
1966}
874 1967
1968static void
1969api_schedule_to (pTHX_ SV *coro_sv)
1970{
1971 struct coro_transfer_args ta;
1972 struct coro *next = SvSTATE (coro_sv);
1973
1974 SvREFCNT_inc_NN (coro_sv);
1975 prepare_schedule_to (aTHX_ &ta, next);
1976}
1977
1978static int
1979api_cede (pTHX)
1980{
1981 struct coro_transfer_args ta;
1982
1983 prepare_cede (aTHX_ &ta);
1984
1985 if (expect_true (ta.prev != ta.next))
1986 {
1987 TRANSFER (ta, 1);
875 return; 1988 return 1;
1989 }
1990 else
1991 return 0;
1992}
1993
1994static int
1995api_cede_notself (pTHX)
1996{
1997 if (coro_nready)
1998 {
1999 struct coro_transfer_args ta;
2000
2001 prepare_cede_notself (aTHX_ &ta);
2002 TRANSFER (ta, 1);
2003 return 1;
2004 }
2005 else
2006 return 0;
2007}
2008
2009static void
2010api_trace (pTHX_ SV *coro_sv, int flags)
2011{
2012 struct coro *coro = SvSTATE (coro_sv);
2013
2014 if (coro->flags & CF_RUNNING)
2015 croak ("cannot enable tracing on a running coroutine, caught");
2016
2017 if (flags & CC_TRACE)
2018 {
2019 if (!coro->cctx)
2020 coro->cctx = cctx_new_run ();
2021 else if (!(coro->cctx->flags & CC_TRACE))
2022 croak ("cannot enable tracing on coroutine with custom stack, caught");
2023
2024 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2025 }
2026 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2027 {
2028 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2029
2030 if (coro->flags & CF_RUNNING)
2031 PL_runops = RUNOPS_DEFAULT;
2032 else
2033 coro->slot->runops = RUNOPS_DEFAULT;
2034 }
2035}
2036
2037static void
2038coro_push_av (pTHX_ AV *av, I32 gimme_v)
2039{
2040 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2041 {
2042 dSP;
2043
2044 if (gimme_v == G_SCALAR)
2045 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2046 else
2047 {
2048 int i;
2049 EXTEND (SP, AvFILLp (av) + 1);
2050
2051 for (i = 0; i <= AvFILLp (av); ++i)
2052 PUSHs (AvARRAY (av)[i]);
2053 }
2054
2055 PUTBACK;
2056 }
2057}
2058
2059static void
2060coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2061{
2062 if (!coro->on_destroy)
2063 coro->on_destroy = newAV ();
2064
2065 av_push (coro->on_destroy, cb);
2066}
2067
2068static void
2069slf_destroy_join (pTHX_ struct CoroSLF *frame)
2070{
2071 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2072}
2073
2074static int
2075slf_check_join (pTHX_ struct CoroSLF *frame)
2076{
2077 struct coro *coro = (struct coro *)frame->data;
2078
2079 if (!coro->status)
2080 return 1;
2081
2082 frame->destroy = 0;
2083
2084 coro_push_av (aTHX_ coro->status, GIMME_V);
2085
2086 SvREFCNT_dec ((SV *)coro->hv);
2087
2088 return 0;
2089}
2090
2091static void
2092slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2093{
2094 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2095
2096 if (items > 1)
2097 croak ("join called with too many arguments");
2098
2099 if (coro->status)
2100 frame->prepare = prepare_nop;
2101 else
2102 {
2103 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2104 frame->prepare = prepare_schedule;
2105 }
2106
2107 frame->check = slf_check_join;
2108 frame->destroy = slf_destroy_join;
2109 frame->data = (void *)coro;
2110 SvREFCNT_inc (coro->hv);
2111}
2112
2113static void
2114coro_call_on_destroy (pTHX_ struct coro *coro)
2115{
2116 AV *od = coro->on_destroy;
2117
2118 if (!od)
2119 return;
2120
2121 while (AvFILLp (od) >= 0)
2122 {
2123 SV *cb = sv_2mortal (av_pop (od));
2124
2125 /* coro hv's (and only hv's at the moment) are supported as well */
2126 if (SvSTATEhv_p (aTHX_ cb))
2127 api_ready (aTHX_ cb);
2128 else
2129 {
2130 dSP; /* don't disturb outer sp */
2131 PUSHMARK (SP);
2132
2133 if (coro->status)
2134 {
2135 PUTBACK;
2136 coro_push_av (aTHX_ coro->status, G_ARRAY);
2137 SPAGAIN;
2138 }
2139
2140 PUTBACK;
2141 call_sv (cb, G_VOID | G_DISCARD);
2142 }
2143 }
2144}
2145
2146static void
2147coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2148{
2149 AV *av;
2150
2151 if (coro->status)
2152 {
2153 av = coro->status;
2154 av_clear (av);
2155 }
2156 else
2157 av = coro->status = newAV ();
2158
2159 /* items are actually not so common, so optimise for this case */
2160 if (items)
2161 {
2162 int i;
2163
2164 av_extend (av, items - 1);
2165
2166 for (i = 0; i < items; ++i)
2167 av_push (av, SvREFCNT_inc_NN (arg [i]));
2168 }
2169}
2170
2171static void
2172slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2173{
2174 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2175 api_ready (aTHX_ sv_manager);
2176
2177 frame->prepare = prepare_schedule;
2178 frame->check = slf_check_repeat;
2179
2180 /* as a minor optimisation, we could unwind all stacks here */
2181 /* but that puts extra pressure on pp_slf, and is not worth much */
2182 /*coro_unwind_stacks (aTHX);*/
2183}
2184
2185static void
2186slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2187{
2188 HV *coro_hv = (HV *)SvRV (coro_current);
2189
2190 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2191 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2192}
2193
2194static void
2195slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 HV *coro_hv;
2198 struct coro *coro;
2199
2200 if (items <= 0)
2201 croak ("Coro::cancel called without coro object,");
2202
2203 coro = SvSTATE (arg [0]);
2204 coro_hv = coro->hv;
2205
2206 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2207
2208 if (expect_false (coro->flags & CF_NOCANCEL))
2209 {
2210 /* coro currently busy cancelling something, so just notify it */
2211 coro->slf_frame.data = (void *)coro;
2212
2213 frame->prepare = prepare_nop;
2214 frame->check = slf_check_nop;
2215 }
2216 else if (coro_hv == (HV *)SvRV (coro_current))
2217 {
2218 /* cancelling the current coro is allowed, and equals terminate */
2219 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2220 }
2221 else
2222 {
2223 struct coro *self = SvSTATE_current;
2224
2225 /* otherwise we cancel directly, purely for speed reasons
2226 * unfortunately, this requires some magic trickery, as
2227 * somebody else could cancel us, so we have to fight the cancellation.
2228 * this is ugly, and hopefully fully worth the extra speed.
2229 * besides, I can't get the slow-but-safe version working...
2230 */
2231 slf_frame.data = 0;
2232 self->flags |= CF_NOCANCEL;
2233 coro_state_destroy (aTHX_ coro);
2234 self->flags &= ~CF_NOCANCEL;
2235
2236 if (slf_frame.data)
2237 {
2238 /* while we were busy we have been cancelled, so terminate */
2239 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2240 }
2241 else
2242 {
2243 frame->prepare = prepare_nop;
2244 frame->check = slf_check_nop;
2245 }
2246 }
2247}
2248
2249static int
2250slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2251{
2252 frame->prepare = 0;
2253 coro_unwind_stacks (aTHX);
2254
2255 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2256
2257 return 1;
2258}
2259
2260static int
2261safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2262{
2263 if (coro->cctx)
2264 croak ("coro inside C callback, unable to cancel at this time, caught");
2265
2266 if (coro->flags & CF_NEW)
2267 {
2268 coro_set_status (aTHX_ coro, arg, items);
2269 coro_state_destroy (aTHX_ coro);
2270 }
2271 else
2272 {
2273 if (!coro->slf_frame.prepare)
2274 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2275
2276 slf_destroy (aTHX_ coro);
2277
2278 coro_set_status (aTHX_ coro, arg, items);
2279 coro->slf_frame.prepare = prepare_nop;
2280 coro->slf_frame.check = slf_check_safe_cancel;
2281
2282 api_ready (aTHX_ (SV *)coro->hv);
2283 }
2284
2285 return 1;
2286}
2287
2288/*****************************************************************************/
2289/* async pool handler */
2290
2291static int
2292slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2293{
2294 HV *hv = (HV *)SvRV (coro_current);
2295 struct coro *coro = (struct coro *)frame->data;
2296
2297 if (!coro->invoke_cb)
2298 return 1; /* loop till we have invoke */
2299 else
2300 {
2301 hv_store (hv, "desc", sizeof ("desc") - 1,
2302 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2303
2304 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2305
2306 {
2307 dSP;
2308 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2309 PUTBACK;
876 } 2310 }
877 2311
878 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2312 SvREFCNT_dec (GvAV (PL_defgv));
2313 GvAV (PL_defgv) = coro->invoke_av;
2314 coro->invoke_av = 0;
2315
2316 return 0;
2317 }
2318}
2319
2320static void
2321slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2322{
2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv ((SV *)hv);
2325
2326 if (expect_true (coro->saved_deffh))
2327 {
2328 /* subsequent iteration */
2329 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2330 coro->saved_deffh = 0;
2331
2332 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2333 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2334 {
2335 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2336 return;
2337 }
2338 else
2339 {
2340 av_clear (GvAV (PL_defgv));
2341 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2342
2343 coro->prio = 0;
2344
2345 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2346 api_trace (aTHX_ coro_current, 0);
2347
2348 frame->prepare = prepare_schedule;
2349 av_push (av_async_pool, SvREFCNT_inc (hv));
2350 }
2351 }
2352 else
2353 {
2354 /* first iteration, simply fall through */
2355 frame->prepare = prepare_nop;
2356 }
2357
2358 frame->check = slf_check_pool_handler;
2359 frame->data = (void *)coro;
2360}
2361
2362/*****************************************************************************/
2363/* rouse callback */
2364
2365#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2366
2367static void
2368coro_rouse_callback (pTHX_ CV *cv)
2369{
2370 dXSARGS;
2371 SV *data = (SV *)S_GENSUB_ARG;
2372
2373 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2374 {
2375 /* first call, set args */
2376 SV *coro = SvRV (data);
2377 AV *av = newAV ();
2378
2379 SvRV_set (data, (SV *)av);
2380
2381 /* better take a full copy of the arguments */
2382 while (items--)
2383 av_store (av, items, newSVsv (ST (items)));
2384
2385 api_ready (aTHX_ coro);
2386 SvREFCNT_dec (coro);
2387 }
2388
2389 XSRETURN_EMPTY;
2390}
2391
2392static int
2393slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2394{
2395 SV *data = (SV *)frame->data;
2396
2397 if (CORO_THROW)
2398 return 0;
2399
2400 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2401 return 1;
2402
2403 /* now push all results on the stack */
2404 {
2405 dSP;
2406 AV *av = (AV *)SvRV (data);
2407 int i;
2408
2409 EXTEND (SP, AvFILLp (av) + 1);
2410 for (i = 0; i <= AvFILLp (av); ++i)
2411 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2412
2413 /* we have stolen the elements, so set length to zero and free */
2414 AvFILLp (av) = -1;
2415 av_undef (av);
2416
2417 PUTBACK;
2418 }
2419
2420 return 0;
2421}
2422
2423static void
2424slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2425{
2426 SV *cb;
2427
2428 if (items)
2429 cb = arg [0];
2430 else
2431 {
2432 struct coro *coro = SvSTATE_current;
2433
2434 if (!coro->rouse_cb)
2435 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2436
2437 cb = sv_2mortal (coro->rouse_cb);
2438 coro->rouse_cb = 0;
2439 }
2440
2441 if (!SvROK (cb)
2442 || SvTYPE (SvRV (cb)) != SVt_PVCV
2443 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2444 croak ("Coro::rouse_wait called with illegal callback argument,");
2445
2446 {
2447 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2448 SV *data = (SV *)S_GENSUB_ARG;
2449
2450 frame->data = (void *)data;
2451 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2452 frame->check = slf_check_rouse_wait;
2453 }
879} 2454}
880 2455
881static SV * 2456static SV *
882coro_deq (pTHX_ int min_prio) 2457coro_new_rouse_cb (pTHX)
883{ 2458{
884 int prio = PRIO_MAX - PRIO_MIN; 2459 HV *hv = (HV *)SvRV (coro_current);
2460 struct coro *coro = SvSTATE_hv (hv);
2461 SV *data = newRV_inc ((SV *)hv);
2462 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
885 2463
886 min_prio -= PRIO_MIN; 2464 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
887 if (min_prio < 0) 2465 SvREFCNT_dec (data); /* magicext increases the refcount */
888 min_prio = 0;
889 2466
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2467 SvREFCNT_dec (coro->rouse_cb);
891 if (av_len (coro_ready[prio]) >= 0) 2468 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2469
2470 return cb;
2471}
2472
2473/*****************************************************************************/
2474/* schedule-like-function opcode (SLF) */
2475
2476static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2477static const CV *slf_cv;
2478static SV **slf_argv;
2479static int slf_argc, slf_arga; /* count, allocated */
2480static I32 slf_ax; /* top of stack, for restore */
2481
2482/* this restores the stack in the case we patched the entersub, to */
2483/* recreate the stack frame as perl will on following calls */
2484/* since entersub cleared the stack */
2485static OP *
2486pp_restore (pTHX)
2487{
2488 int i;
2489 SV **SP = PL_stack_base + slf_ax;
2490
2491 PUSHMARK (SP);
2492
2493 EXTEND (SP, slf_argc + 1);
2494
2495 for (i = 0; i < slf_argc; ++i)
2496 PUSHs (sv_2mortal (slf_argv [i]));
2497
2498 PUSHs ((SV *)CvGV (slf_cv));
2499
2500 RETURNOP (slf_restore.op_first);
2501}
2502
2503static void
2504slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2505{
2506 SV **arg = (SV **)slf_frame.data;
2507
2508 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2509}
2510
2511static void
2512slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2513{
2514 if (items != 2)
2515 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2516
2517 frame->prepare = slf_prepare_transfer;
2518 frame->check = slf_check_nop;
2519 frame->data = (void *)arg; /* let's hope it will stay valid */
2520}
2521
2522static void
2523slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2524{
2525 frame->prepare = prepare_schedule;
2526 frame->check = slf_check_nop;
2527}
2528
2529static void
2530slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2531{
2532 struct coro *next = (struct coro *)slf_frame.data;
2533
2534 SvREFCNT_inc_NN (next->hv);
2535 prepare_schedule_to (aTHX_ ta, next);
2536}
2537
2538static void
2539slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2540{
2541 if (!items)
2542 croak ("Coro::schedule_to expects a coroutine argument, caught");
2543
2544 frame->data = (void *)SvSTATE (arg [0]);
2545 frame->prepare = slf_prepare_schedule_to;
2546 frame->check = slf_check_nop;
2547}
2548
2549static void
2550slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2551{
2552 api_ready (aTHX_ SvRV (coro_current));
2553
2554 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2555}
2556
2557static void
2558slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2559{
2560 frame->prepare = prepare_cede;
2561 frame->check = slf_check_nop;
2562}
2563
2564static void
2565slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2566{
2567 frame->prepare = prepare_cede_notself;
2568 frame->check = slf_check_nop;
2569}
2570
2571/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2572static void
2573slf_destroy (pTHX_ struct coro *coro)
2574{
2575 /* this callback is reserved for slf functions needing to do cleanup */
2576 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2577 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2578
2579 /*
2580 * The on_destroy above most likely is from an SLF call.
2581 * Since by definition the SLF call will not finish when we destroy
2582 * the coro, we will have to force-finish it here, otherwise
2583 * cleanup functions cannot call SLF functions.
2584 */
2585 coro->slf_frame.prepare = 0;
2586}
2587
2588/*
2589 * these not obviously related functions are all rolled into one
2590 * function to increase chances that they all will call transfer with the same
2591 * stack offset
2592 * SLF stands for "schedule-like-function".
2593 */
2594static OP *
2595pp_slf (pTHX)
2596{
2597 I32 checkmark; /* mark SP to see how many elements check has pushed */
2598
2599 /* set up the slf frame, unless it has already been set-up */
2600 /* the latter happens when a new coro has been started */
2601 /* or when a new cctx was attached to an existing coroutine */
2602 if (expect_true (!slf_frame.prepare))
2603 {
2604 /* first iteration */
2605 dSP;
2606 SV **arg = PL_stack_base + TOPMARK + 1;
2607 int items = SP - arg; /* args without function object */
2608 SV *gv = *sp;
2609
2610 /* do a quick consistency check on the "function" object, and if it isn't */
2611 /* for us, divert to the real entersub */
2612 if (SvTYPE (gv) != SVt_PVGV
2613 || !GvCV (gv)
2614 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2615 return PL_ppaddr[OP_ENTERSUB](aTHX);
2616
2617 if (!(PL_op->op_flags & OPf_STACKED))
892 { 2618 {
893 coro_nready--; 2619 /* ampersand-form of call, use @_ instead of stack */
894 return av_shift (coro_ready[prio]); 2620 AV *av = GvAV (PL_defgv);
2621 arg = AvARRAY (av);
2622 items = AvFILLp (av) + 1;
895 } 2623 }
2624
2625 /* now call the init function, which needs to set up slf_frame */
2626 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2627 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2628
2629 /* pop args */
2630 SP = PL_stack_base + POPMARK;
2631
2632 PUTBACK;
2633 }
2634
2635 /* now that we have a slf_frame, interpret it! */
2636 /* we use a callback system not to make the code needlessly */
2637 /* complicated, but so we can run multiple perl coros from one cctx */
2638
2639 do
2640 {
2641 struct coro_transfer_args ta;
2642
2643 slf_frame.prepare (aTHX_ &ta);
2644 TRANSFER (ta, 0);
2645
2646 checkmark = PL_stack_sp - PL_stack_base;
2647 }
2648 while (slf_frame.check (aTHX_ &slf_frame));
2649
2650 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2651
2652 /* exception handling */
2653 if (expect_false (CORO_THROW))
2654 {
2655 SV *exception = sv_2mortal (CORO_THROW);
2656
2657 CORO_THROW = 0;
2658 sv_setsv (ERRSV, exception);
2659 croak (0);
2660 }
2661
2662 /* return value handling - mostly like entersub */
2663 /* make sure we put something on the stack in scalar context */
2664 if (GIMME_V == G_SCALAR
2665 && expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2666 {
2667 dSP;
2668 SV **bot = PL_stack_base + checkmark;
2669
2670 if (sp == bot) /* too few, push undef */
2671 bot [1] = &PL_sv_undef;
2672 else /* too many, take last one */
2673 bot [1] = *sp;
2674
2675 SP = bot + 1;
2676
2677 PUTBACK;
2678 }
2679
2680 return NORMAL;
2681}
2682
2683static void
2684api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2685{
2686 int i;
2687 SV **arg = PL_stack_base + ax;
2688 int items = PL_stack_sp - arg + 1;
2689
2690 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2691
2692 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2693 && PL_op->op_ppaddr != pp_slf)
2694 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2695
2696 CvFLAGS (cv) |= CVf_SLF;
2697 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2698 slf_cv = cv;
2699
2700 /* we patch the op, and then re-run the whole call */
2701 /* we have to put the same argument on the stack for this to work */
2702 /* and this will be done by pp_restore */
2703 slf_restore.op_next = (OP *)&slf_restore;
2704 slf_restore.op_type = OP_CUSTOM;
2705 slf_restore.op_ppaddr = pp_restore;
2706 slf_restore.op_first = PL_op;
2707
2708 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2709
2710 if (PL_op->op_flags & OPf_STACKED)
2711 {
2712 if (items > slf_arga)
2713 {
2714 slf_arga = items;
2715 Safefree (slf_argv);
2716 New (0, slf_argv, slf_arga, SV *);
2717 }
2718
2719 slf_argc = items;
2720
2721 for (i = 0; i < items; ++i)
2722 slf_argv [i] = SvREFCNT_inc (arg [i]);
2723 }
2724 else
2725 slf_argc = 0;
2726
2727 PL_op->op_ppaddr = pp_slf;
2728 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2729
2730 PL_op = (OP *)&slf_restore;
2731}
2732
2733/*****************************************************************************/
2734/* dynamic wind */
2735
2736static void
2737on_enterleave_call (pTHX_ SV *cb)
2738{
2739 dSP;
2740
2741 PUSHSTACK;
2742
2743 PUSHMARK (SP);
2744 PUTBACK;
2745 call_sv (cb, G_VOID | G_DISCARD);
2746 SPAGAIN;
2747
2748 POPSTACK;
2749}
2750
2751static SV *
2752coro_avp_pop_and_free (pTHX_ AV **avp)
2753{
2754 AV *av = *avp;
2755 SV *res = av_pop (av);
2756
2757 if (AvFILLp (av) < 0)
2758 {
2759 *avp = 0;
2760 SvREFCNT_dec (av);
2761 }
2762
2763 return res;
2764}
2765
2766static void
2767coro_pop_on_enter (pTHX_ void *coro)
2768{
2769 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2770 SvREFCNT_dec (cb);
2771}
2772
2773static void
2774coro_pop_on_leave (pTHX_ void *coro)
2775{
2776 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2777 on_enterleave_call (aTHX_ sv_2mortal (cb));
2778}
2779
2780/*****************************************************************************/
2781/* PerlIO::cede */
2782
2783typedef struct
2784{
2785 PerlIOBuf base;
2786 NV next, every;
2787} PerlIOCede;
2788
2789static IV
2790PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2791{
2792 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2793
2794 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2795 self->next = nvtime () + self->every;
2796
2797 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2798}
2799
2800static SV *
2801PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2802{
2803 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2804
2805 return newSVnv (self->every);
2806}
2807
2808static IV
2809PerlIOCede_flush (pTHX_ PerlIO *f)
2810{
2811 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2812 double now = nvtime ();
2813
2814 if (now >= self->next)
2815 {
2816 api_cede (aTHX);
2817 self->next = now + self->every;
2818 }
2819
2820 return PerlIOBuf_flush (aTHX_ f);
2821}
2822
2823static PerlIO_funcs PerlIO_cede =
2824{
2825 sizeof(PerlIO_funcs),
2826 "cede",
2827 sizeof(PerlIOCede),
2828 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2829 PerlIOCede_pushed,
2830 PerlIOBuf_popped,
2831 PerlIOBuf_open,
2832 PerlIOBase_binmode,
2833 PerlIOCede_getarg,
2834 PerlIOBase_fileno,
2835 PerlIOBuf_dup,
2836 PerlIOBuf_read,
2837 PerlIOBuf_unread,
2838 PerlIOBuf_write,
2839 PerlIOBuf_seek,
2840 PerlIOBuf_tell,
2841 PerlIOBuf_close,
2842 PerlIOCede_flush,
2843 PerlIOBuf_fill,
2844 PerlIOBase_eof,
2845 PerlIOBase_error,
2846 PerlIOBase_clearerr,
2847 PerlIOBase_setlinebuf,
2848 PerlIOBuf_get_base,
2849 PerlIOBuf_bufsiz,
2850 PerlIOBuf_get_ptr,
2851 PerlIOBuf_get_cnt,
2852 PerlIOBuf_set_ptrcnt,
2853};
2854
2855/*****************************************************************************/
2856/* Coro::Semaphore & Coro::Signal */
2857
2858static SV *
2859coro_waitarray_new (pTHX_ int count)
2860{
2861 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2862 AV *av = newAV ();
2863 SV **ary;
2864
2865 /* unfortunately, building manually saves memory */
2866 Newx (ary, 2, SV *);
2867 AvALLOC (av) = ary;
2868#if PERL_VERSION_ATLEAST (5,10,0)
2869 AvARRAY (av) = ary;
2870#else
2871 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2872 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2873 SvPVX ((SV *)av) = (char *)ary;
2874#endif
2875 AvMAX (av) = 1;
2876 AvFILLp (av) = 0;
2877 ary [0] = newSViv (count);
2878
2879 return newRV_noinc ((SV *)av);
2880}
2881
2882/* semaphore */
2883
2884static void
2885coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2886{
2887 SV *count_sv = AvARRAY (av)[0];
2888 IV count = SvIVX (count_sv);
2889
2890 count += adjust;
2891 SvIVX (count_sv) = count;
2892
2893 /* now wake up as many waiters as are expected to lock */
2894 while (count > 0 && AvFILLp (av) > 0)
2895 {
2896 SV *cb;
2897
2898 /* swap first two elements so we can shift a waiter */
2899 AvARRAY (av)[0] = AvARRAY (av)[1];
2900 AvARRAY (av)[1] = count_sv;
2901 cb = av_shift (av);
2902
2903 if (SvOBJECT (cb))
2904 {
2905 api_ready (aTHX_ cb);
2906 --count;
2907 }
2908 else if (SvTYPE (cb) == SVt_PVCV)
2909 {
2910 dSP;
2911 PUSHMARK (SP);
2912 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2913 PUTBACK;
2914 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2915 }
2916
2917 SvREFCNT_dec (cb);
2918 }
2919}
2920
2921static void
2922coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2923{
2924 /* call $sem->adjust (0) to possibly wake up some other waiters */
2925 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2926}
2927
2928static int
2929slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2930{
2931 AV *av = (AV *)frame->data;
2932 SV *count_sv = AvARRAY (av)[0];
2933 SV *coro_hv = SvRV (coro_current);
2934
2935 /* if we are about to throw, don't actually acquire the lock, just throw */
2936 if (CORO_THROW)
2937 return 0;
2938 else if (SvIVX (count_sv) > 0)
2939 {
2940 frame->destroy = 0;
2941
2942 if (acquire)
2943 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2944 else
2945 coro_semaphore_adjust (aTHX_ av, 0);
2946
2947 return 0;
2948 }
2949 else
2950 {
2951 int i;
2952 /* if we were woken up but can't down, we look through the whole */
2953 /* waiters list and only add us if we aren't in there already */
2954 /* this avoids some degenerate memory usage cases */
2955 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2956 if (AvARRAY (av)[i] == coro_hv)
2957 return 1;
2958
2959 av_push (av, SvREFCNT_inc (coro_hv));
2960 return 1;
2961 }
2962}
2963
2964static int
2965slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2966{
2967 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2968}
2969
2970static int
2971slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2972{
2973 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2974}
2975
2976static void
2977slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2978{
2979 AV *av = (AV *)SvRV (arg [0]);
2980
2981 if (SvIVX (AvARRAY (av)[0]) > 0)
2982 {
2983 frame->data = (void *)av;
2984 frame->prepare = prepare_nop;
2985 }
2986 else
2987 {
2988 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2989
2990 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2991 frame->prepare = prepare_schedule;
2992 /* to avoid race conditions when a woken-up coro gets terminated */
2993 /* we arrange for a temporary on_destroy that calls adjust (0) */
2994 frame->destroy = coro_semaphore_destroy;
2995 }
2996}
2997
2998static void
2999slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3000{
3001 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3002 frame->check = slf_check_semaphore_down;
3003}
3004
3005static void
3006slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 if (items >= 2)
3009 {
3010 /* callback form */
3011 AV *av = (AV *)SvRV (arg [0]);
3012 SV *cb_cv = s_get_cv_croak (arg [1]);
3013
3014 av_push (av, SvREFCNT_inc_NN (cb_cv));
3015
3016 if (SvIVX (AvARRAY (av)[0]) > 0)
3017 coro_semaphore_adjust (aTHX_ av, 0);
3018
3019 frame->prepare = prepare_nop;
3020 frame->check = slf_check_nop;
3021 }
3022 else
3023 {
3024 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3025 frame->check = slf_check_semaphore_wait;
3026 }
3027}
3028
3029/* signal */
3030
3031static void
3032coro_signal_wake (pTHX_ AV *av, int count)
3033{
3034 SvIVX (AvARRAY (av)[0]) = 0;
3035
3036 /* now signal count waiters */
3037 while (count > 0 && AvFILLp (av) > 0)
3038 {
3039 SV *cb;
3040
3041 /* swap first two elements so we can shift a waiter */
3042 cb = AvARRAY (av)[0];
3043 AvARRAY (av)[0] = AvARRAY (av)[1];
3044 AvARRAY (av)[1] = cb;
3045
3046 cb = av_shift (av);
3047
3048 if (SvTYPE (cb) == SVt_PVCV)
3049 {
3050 dSP;
3051 PUSHMARK (SP);
3052 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3053 PUTBACK;
3054 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3055 }
3056 else
3057 {
3058 api_ready (aTHX_ cb);
3059 sv_setiv (cb, 0); /* signal waiter */
3060 }
3061
3062 SvREFCNT_dec (cb);
3063
3064 --count;
3065 }
3066}
3067
3068static int
3069slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3070{
3071 /* if we are about to throw, also stop waiting */
3072 return SvROK ((SV *)frame->data) && !CORO_THROW;
3073}
3074
3075static void
3076slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3077{
3078 AV *av = (AV *)SvRV (arg [0]);
3079
3080 if (items >= 2)
3081 {
3082 SV *cb_cv = s_get_cv_croak (arg [1]);
3083 av_push (av, SvREFCNT_inc_NN (cb_cv));
3084
3085 if (SvIVX (AvARRAY (av)[0]))
3086 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3087
3088 frame->prepare = prepare_nop;
3089 frame->check = slf_check_nop;
3090 }
3091 else if (SvIVX (AvARRAY (av)[0]))
3092 {
3093 SvIVX (AvARRAY (av)[0]) = 0;
3094 frame->prepare = prepare_nop;
3095 frame->check = slf_check_nop;
3096 }
3097 else
3098 {
3099 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3100
3101 av_push (av, waiter);
3102
3103 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3104 frame->prepare = prepare_schedule;
3105 frame->check = slf_check_signal_wait;
3106 }
3107}
3108
3109/*****************************************************************************/
3110/* Coro::AIO */
3111
3112#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3113
3114/* helper storage struct */
3115struct io_state
3116{
3117 int errorno;
3118 I32 laststype; /* U16 in 5.10.0 */
3119 int laststatval;
3120 Stat_t statcache;
3121};
3122
3123static void
3124coro_aio_callback (pTHX_ CV *cv)
3125{
3126 dXSARGS;
3127 AV *state = (AV *)S_GENSUB_ARG;
3128 SV *coro = av_pop (state);
3129 SV *data_sv = newSV (sizeof (struct io_state));
3130
3131 av_extend (state, items - 1);
3132
3133 sv_upgrade (data_sv, SVt_PV);
3134 SvCUR_set (data_sv, sizeof (struct io_state));
3135 SvPOK_only (data_sv);
3136
3137 {
3138 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3139
3140 data->errorno = errno;
3141 data->laststype = PL_laststype;
3142 data->laststatval = PL_laststatval;
3143 data->statcache = PL_statcache;
3144 }
3145
3146 /* now build the result vector out of all the parameters and the data_sv */
3147 {
3148 int i;
3149
3150 for (i = 0; i < items; ++i)
3151 av_push (state, SvREFCNT_inc_NN (ST (i)));
3152 }
3153
3154 av_push (state, data_sv);
3155
3156 api_ready (aTHX_ coro);
3157 SvREFCNT_dec (coro);
3158 SvREFCNT_dec ((AV *)state);
3159}
3160
3161static int
3162slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3163{
3164 AV *state = (AV *)frame->data;
3165
3166 /* if we are about to throw, return early */
3167 /* this does not cancel the aio request, but at least */
3168 /* it quickly returns */
3169 if (CORO_THROW)
3170 return 0;
3171
3172 /* one element that is an RV? repeat! */
3173 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3174 return 1;
3175
3176 /* restore status */
3177 {
3178 SV *data_sv = av_pop (state);
3179 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3180
3181 errno = data->errorno;
3182 PL_laststype = data->laststype;
3183 PL_laststatval = data->laststatval;
3184 PL_statcache = data->statcache;
3185
3186 SvREFCNT_dec (data_sv);
3187 }
3188
3189 /* push result values */
3190 {
3191 dSP;
3192 int i;
3193
3194 EXTEND (SP, AvFILLp (state) + 1);
3195 for (i = 0; i <= AvFILLp (state); ++i)
3196 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3197
3198 PUTBACK;
3199 }
896 3200
897 return 0; 3201 return 0;
898} 3202}
899 3203
900static void 3204static void
901api_ready (SV *coro) 3205slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
902{ 3206{
903 dTHX; 3207 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
904
905 if (SvROK (coro))
906 coro = SvRV (coro);
907
908 LOCK;
909 coro_enq (aTHX_ SvREFCNT_inc (coro));
910 UNLOCK;
911}
912
913static void
914api_schedule (void)
915{
916 dTHX;
917
918 SV *prev, *next;
919
920 LOCK;
921
922 prev = SvRV (GvSV (coro_current)); 3208 SV *coro_hv = SvRV (coro_current);
923 next = coro_deq (aTHX_ PRIO_MIN); 3209 struct coro *coro = SvSTATE_hv (coro_hv);
924 3210
925 if (!next) 3211 /* put our coroutine id on the state arg */
926 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3212 av_push (state, SvREFCNT_inc_NN (coro_hv));
927 3213
928 /* free this only after the transfer */ 3214 /* first see whether we have a non-zero priority and set it as AIO prio */
929 coro_mortal = prev; 3215 if (coro->prio)
930 SV_CORO (prev, "Coro::schedule"); 3216 {
3217 dSP;
931 3218
932 SvRV (GvSV (coro_current)) = next; 3219 static SV *prio_cv;
3220 static SV *prio_sv;
933 3221
934 SV_CORO (next, "Coro::schedule"); 3222 if (expect_false (!prio_cv))
3223 {
3224 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3225 prio_sv = newSViv (0);
3226 }
935 3227
936 UNLOCK; 3228 PUSHMARK (SP);
3229 sv_setiv (prio_sv, coro->prio);
3230 XPUSHs (prio_sv);
937 3231
938 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3232 PUTBACK;
939 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3233 call_sv (prio_cv, G_VOID | G_DISCARD);
940} 3234 }
941 3235
942static void 3236 /* now call the original request */
943api_cede (void) 3237 {
944{ 3238 dSP;
945 dTHX; 3239 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3240 int i;
946 3241
947 LOCK; 3242 PUSHMARK (SP);
948 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
949 UNLOCK;
950 3243
951 api_schedule (); 3244 /* first push all args to the stack */
952} 3245 EXTEND (SP, items + 1);
953 3246
3247 for (i = 0; i < items; ++i)
3248 PUSHs (arg [i]);
3249
3250 /* now push the callback closure */
3251 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3252
3253 /* now call the AIO function - we assume our request is uncancelable */
3254 PUTBACK;
3255 call_sv ((SV *)req, G_VOID | G_DISCARD);
3256 }
3257
3258 /* now that the request is going, we loop till we have a result */
3259 frame->data = (void *)state;
3260 frame->prepare = prepare_schedule;
3261 frame->check = slf_check_aio_req;
3262}
3263
3264static void
3265coro_aio_req_xs (pTHX_ CV *cv)
3266{
3267 dXSARGS;
3268
3269 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3270
3271 XSRETURN_EMPTY;
3272}
3273
3274/*****************************************************************************/
3275
3276#if CORO_CLONE
3277# include "clone.c"
3278#endif
3279
3280/*****************************************************************************/
3281
3282static SV *
3283coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3284{
3285 SV *coro_sv;
3286 struct coro *coro;
3287 MAGIC *mg;
3288 HV *hv;
3289 SV *cb;
3290 int i;
3291
3292 if (argc > 0)
3293 {
3294 cb = s_get_cv_croak (argv [0]);
3295
3296 if (!is_coro)
3297 {
3298 if (CvISXSUB (cb))
3299 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3300
3301 if (!CvROOT (cb))
3302 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3303 }
3304 }
3305
3306 Newz (0, coro, 1, struct coro);
3307 coro->args = newAV ();
3308 coro->flags = CF_NEW;
3309
3310 if (coro_first) coro_first->prev = coro;
3311 coro->next = coro_first;
3312 coro_first = coro;
3313
3314 coro->hv = hv = newHV ();
3315 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3316 mg->mg_flags |= MGf_DUP;
3317 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3318
3319 if (argc > 0)
3320 {
3321 av_extend (coro->args, argc + is_coro - 1);
3322
3323 if (is_coro)
3324 {
3325 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3326 cb = (SV *)cv_coro_run;
3327 }
3328
3329 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3330
3331 for (i = 1; i < argc; i++)
3332 av_push (coro->args, newSVsv (argv [i]));
3333 }
3334
3335 return coro_sv;
3336}
3337
954MODULE = Coro::State PACKAGE = Coro::State 3338MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
955 3339
956PROTOTYPES: ENABLE 3340PROTOTYPES: DISABLE
957 3341
958BOOT: 3342BOOT:
959{ /* {} necessary for stoopid perl-5.6.x */ 3343{
960#ifdef USE_ITHREADS 3344#ifdef USE_ITHREADS
961 MUTEX_INIT (&coro_mutex); 3345# if CORO_PTHREAD
3346 coro_thx = PERL_GET_CONTEXT;
3347# endif
962#endif 3348#endif
3349 BOOT_PAGESIZE;
963 3350
964 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3351 cctx_current = cctx_new_empty ();
965 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3352
3353 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3354 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3355
3356 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3357 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3358 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3359
3360 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3361 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3362 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3363
966 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3364 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967 3365
968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3366 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3367 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3368 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
971 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3369 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
972 3370
973 main_mainstack = PL_mainstack; 3371 main_mainstack = PL_mainstack;
3372 main_top_env = PL_top_env;
974 3373
3374 while (main_top_env->je_prev)
3375 main_top_env = main_top_env->je_prev;
3376
3377 {
3378 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3379
3380 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3381 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3382
3383 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3384 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3385 }
3386
975 coroapi.ver = CORO_API_VERSION; 3387 coroapi.ver = CORO_API_VERSION;
3388 coroapi.rev = CORO_API_REVISION;
3389
976 coroapi.transfer = api_transfer; 3390 coroapi.transfer = api_transfer;
977}
978 3391
979Coro::State 3392 coroapi.sv_state = SvSTATE_;
980_newprocess(args) 3393 coroapi.execute_slf = api_execute_slf;
981 SV * args 3394 coroapi.prepare_nop = prepare_nop;
982 PROTOTYPE: $ 3395 coroapi.prepare_schedule = prepare_schedule;
3396 coroapi.prepare_cede = prepare_cede;
3397 coroapi.prepare_cede_notself = prepare_cede_notself;
3398
3399 time_init (aTHX);
3400
3401 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3402}
3403
3404SV *
3405new (SV *klass, ...)
3406 ALIAS:
3407 Coro::new = 1
983 CODE: 3408 CODE:
984 Coro__State coro; 3409 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
985 3410 OUTPUT:
986 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
987 croak ("Coro::State::_newprocess expects an arrayref");
988
989 Newz (0, coro, 1, struct coro);
990
991 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
992 /*coro->mainstack = 0; *//*actual work is done inside transfer */
993 /*coro->stack = 0;*/
994
995 /* same as JMPENV_BOOTSTRAP */
996 /* we might be able to recycle start_env, but safe is safe */
997 /*Zero(&coro->start_env, 1, JMPENV);*/
998 coro->start_env.je_ret = -1;
999 coro->start_env.je_mustcatch = TRUE;
1000
1001 RETVAL = coro;
1002 OUTPUT:
1003 RETVAL 3411 RETVAL
1004 3412
1005void 3413void
1006transfer(prev, next, flags) 3414transfer (...)
1007 SV *prev
1008 SV *next
1009 int flags
1010 PROTOTYPE: @ 3415 PROTOTYPE: $$
1011 CODE: 3416 CODE:
1012 PUTBACK; 3417 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1013 SV_CORO (next, "Coro::transfer");
1014 SV_CORO (prev, "Coro::transfer");
1015 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1016 SPAGAIN;
1017 3418
1018void 3419void
1019DESTROY(coro)
1020 Coro::State coro
1021 CODE:
1022
1023 if (coro->mainstack && coro->mainstack != main_mainstack)
1024 {
1025 struct coro temp;
1026
1027 PUTBACK;
1028 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1029 LOAD (aTHX_ coro);
1030 SPAGAIN;
1031
1032 destroy_stacks (aTHX);
1033
1034 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035 SPAGAIN;
1036
1037 coro->mainstack = 0;
1038 }
1039
1040 deallocate_stack (coro);
1041 SvREFCNT_dec (coro->args);
1042 Safefree (coro);
1043
1044void
1045_exit(code) 3420_exit (int code)
1046 int code
1047 PROTOTYPE: $ 3421 PROTOTYPE: $
1048 CODE: 3422 CODE:
1049 _exit (code); 3423 _exit (code);
1050 3424
1051MODULE = Coro::State PACKAGE = Coro::Cont 3425SV *
3426clone (Coro::State coro)
3427 CODE:
3428{
3429#if CORO_CLONE
3430 struct coro *ncoro = coro_clone (aTHX_ coro);
3431 MAGIC *mg;
3432 /* TODO: too much duplication */
3433 ncoro->hv = newHV ();
3434 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3435 mg->mg_flags |= MGf_DUP;
3436 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3437#else
3438 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3439#endif
3440}
3441 OUTPUT:
3442 RETVAL
1052 3443
1053# this is slightly dirty (should expose a c-level api) 3444int
3445cctx_stacksize (int new_stacksize = 0)
3446 PROTOTYPE: ;$
3447 CODE:
3448 RETVAL = cctx_stacksize;
3449 if (new_stacksize)
3450 {
3451 cctx_stacksize = new_stacksize;
3452 ++cctx_gen;
3453 }
3454 OUTPUT:
3455 RETVAL
3456
3457int
3458cctx_max_idle (int max_idle = 0)
3459 PROTOTYPE: ;$
3460 CODE:
3461 RETVAL = cctx_max_idle;
3462 if (max_idle > 1)
3463 cctx_max_idle = max_idle;
3464 OUTPUT:
3465 RETVAL
3466
3467int
3468cctx_count ()
3469 PROTOTYPE:
3470 CODE:
3471 RETVAL = cctx_count;
3472 OUTPUT:
3473 RETVAL
3474
3475int
3476cctx_idle ()
3477 PROTOTYPE:
3478 CODE:
3479 RETVAL = cctx_idle;
3480 OUTPUT:
3481 RETVAL
1054 3482
1055void 3483void
1056yield(...) 3484list ()
1057 PROTOTYPE: @ 3485 PROTOTYPE:
3486 PPCODE:
3487{
3488 struct coro *coro;
3489 for (coro = coro_first; coro; coro = coro->next)
3490 if (coro->hv)
3491 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3492}
3493
3494void
3495call (Coro::State coro, SV *coderef)
3496 ALIAS:
3497 eval = 1
3498 CODE:
3499{
3500 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3501 {
3502 struct coro *current = SvSTATE_current;
3503 struct CoroSLF slf_save;
3504
3505 if (current != coro)
3506 {
3507 PUTBACK;
3508 save_perl (aTHX_ current);
3509 load_perl (aTHX_ coro);
3510 /* the coro is most likely in an active SLF call.
3511 * while not strictly required (the code we execute is
3512 * not allowed to call any SLF functions), it's cleaner
3513 * to reinitialise the slf_frame and restore it later.
3514 * This might one day allow us to actually do SLF calls
3515 * from code executed here.
3516 */
3517 slf_save = slf_frame;
3518 slf_frame.prepare = 0;
3519 SPAGAIN;
3520 }
3521
3522 PUSHSTACK;
3523
3524 PUSHMARK (SP);
3525 PUTBACK;
3526
3527 if (ix)
3528 eval_sv (coderef, 0);
3529 else
3530 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3531
3532 POPSTACK;
3533 SPAGAIN;
3534
3535 if (current != coro)
3536 {
3537 PUTBACK;
3538 slf_frame = slf_save;
3539 save_perl (aTHX_ coro);
3540 load_perl (aTHX_ current);
3541 SPAGAIN;
3542 }
3543 }
3544}
3545
3546SV *
3547is_ready (Coro::State coro)
3548 PROTOTYPE: $
3549 ALIAS:
3550 is_ready = CF_READY
3551 is_running = CF_RUNNING
3552 is_new = CF_NEW
3553 is_destroyed = CF_ZOMBIE
3554 is_zombie = CF_ZOMBIE
3555 is_suspended = CF_SUSPENDED
3556 CODE:
3557 RETVAL = boolSV (coro->flags & ix);
3558 OUTPUT:
3559 RETVAL
3560
3561void
3562throw (Coro::State self, SV *exception = &PL_sv_undef)
3563 PROTOTYPE: $;$
1058 CODE: 3564 CODE:
1059 SV *yieldstack; 3565{
1060 SV *sv; 3566 struct coro *current = SvSTATE_current;
1061 AV *defav = GvAV (PL_defgv); 3567 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1062 struct coro *prev, *next;
1063
1064 yieldstack = *hv_fetch (
1065 (HV *)SvRV (GvSV (coro_current)),
1066 "yieldstack", sizeof ("yieldstack") - 1,
1067 0
1068 );
1069
1070 /* set up @_ -- ugly */
1071 av_clear (defav);
1072 av_fill (defav, items - 1);
1073 while (items--)
1074 av_store (defav, items, SvREFCNT_inc (ST(items)));
1075
1076 sv = av_pop ((AV *)SvRV (yieldstack));
1077 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079 SvREFCNT_dec (sv); 3568 SvREFCNT_dec (*exceptionp);
1080 3569 SvGETMAGIC (exception);
1081 transfer (aTHX_ prev, next, 0); 3570 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1082
1083MODULE = Coro::State PACKAGE = Coro
1084
1085# this is slightly dirty (should expose a c-level api)
1086
1087BOOT:
1088{
1089 int i;
1090 HV *stash = gv_stashpv ("Coro", TRUE);
1091
1092 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098
1099 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101
1102 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1103 coro_ready[i] = newAV ();
1104
1105 {
1106 SV *sv = perl_get_sv("Coro::API", 1);
1107
1108 coroapi.schedule = api_schedule;
1109 coroapi.cede = api_cede;
1110 coroapi.ready = api_ready;
1111 coroapi.nready = &coro_nready;
1112 coroapi.current = coro_current;
1113
1114 GCoroAPI = &coroapi;
1115 sv_setiv(sv, (IV)&coroapi);
1116 SvREADONLY_on(sv);
1117 }
1118} 3571}
1119
1120#if !PERL_MICRO
1121 3572
1122void 3573void
1123ready(self) 3574api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1124 SV * self 3575 PROTOTYPE: $;$
3576 C_ARGS: aTHX_ coro, flags
3577
3578SV *
3579has_cctx (Coro::State coro)
1125 PROTOTYPE: $ 3580 PROTOTYPE: $
1126 CODE: 3581 CODE:
1127 api_ready (self); 3582 /* maybe manage the running flag differently */
1128 3583 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1129#endif 3584 OUTPUT:
3585 RETVAL
1130 3586
1131int 3587int
3588is_traced (Coro::State coro)
3589 PROTOTYPE: $
3590 CODE:
3591 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3592 OUTPUT:
3593 RETVAL
3594
3595UV
3596rss (Coro::State coro)
3597 PROTOTYPE: $
3598 ALIAS:
3599 usecount = 1
3600 CODE:
3601 switch (ix)
3602 {
3603 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3604 case 1: RETVAL = coro->usecount; break;
3605 }
3606 OUTPUT:
3607 RETVAL
3608
3609void
3610force_cctx ()
3611 PROTOTYPE:
3612 CODE:
3613 cctx_current->idle_sp = 0;
3614
3615void
3616swap_defsv (Coro::State self)
3617 PROTOTYPE: $
3618 ALIAS:
3619 swap_defav = 1
3620 CODE:
3621 if (!self->slot)
3622 croak ("cannot swap state with coroutine that has no saved state,");
3623 else
3624 {
3625 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3626 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3627
3628 SV *tmp = *src; *src = *dst; *dst = tmp;
3629 }
3630
3631void
3632cancel (Coro::State self)
3633 CODE:
3634 coro_state_destroy (aTHX_ self);
3635
3636SV *
3637enable_times (int enabled = enable_times)
3638 CODE:
3639{
3640 RETVAL = boolSV (enable_times);
3641
3642 if (enabled != enable_times)
3643 {
3644 enable_times = enabled;
3645
3646 coro_times_update ();
3647 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3648 }
3649}
3650 OUTPUT:
3651 RETVAL
3652
3653void
3654times (Coro::State self)
3655 PPCODE:
3656{
3657 struct coro *current = SvSTATE (coro_current);
3658
3659 if (expect_false (current == self))
3660 {
3661 coro_times_update ();
3662 coro_times_add (SvSTATE (coro_current));
3663 }
3664
3665 EXTEND (SP, 2);
3666 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3667 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3668
3669 if (expect_false (current == self))
3670 coro_times_sub (SvSTATE (coro_current));
3671}
3672
3673void
3674swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3675 CODE:
3676{
3677 struct coro *current = SvSTATE_current;
3678
3679 if (current == coro)
3680 SWAP_SVS (current);
3681
3682 if (!coro->swap_sv)
3683 coro->swap_sv = newAV ();
3684
3685 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3686 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3687
3688 if (current == coro)
3689 SWAP_SVS (current);
3690}
3691
3692
3693MODULE = Coro::State PACKAGE = Coro
3694
3695BOOT:
3696{
3697 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3698 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3699 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3700 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3701 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3702 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3703 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3704 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3705
3706 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3707 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3708 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3709 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3710
3711 coro_stash = gv_stashpv ("Coro", TRUE);
3712
3713 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3714 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3715 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3716 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3717 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3718 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3719
3720 {
3721 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3722
3723 coroapi.schedule = api_schedule;
3724 coroapi.schedule_to = api_schedule_to;
3725 coroapi.cede = api_cede;
3726 coroapi.cede_notself = api_cede_notself;
3727 coroapi.ready = api_ready;
3728 coroapi.is_ready = api_is_ready;
3729 coroapi.nready = coro_nready;
3730 coroapi.current = coro_current;
3731
3732 /*GCoroAPI = &coroapi;*/
3733 sv_setiv (sv, (IV)&coroapi);
3734 SvREADONLY_on (sv);
3735 }
3736}
3737
3738SV *
3739async (...)
3740 PROTOTYPE: &@
3741 CODE:
3742 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3743 api_ready (aTHX_ RETVAL);
3744 OUTPUT:
3745 RETVAL
3746
3747void
3748_destroy (Coro::State coro)
3749 CODE:
3750 /* used by the manager thread */
3751 coro_state_destroy (aTHX_ coro);
3752
3753void
3754on_destroy (Coro::State coro, SV *cb)
3755 CODE:
3756 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3757
3758void
3759join (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_join);
3762
3763void
3764terminate (...)
3765 CODE:
3766 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3767
3768void
3769cancel (...)
3770 CODE:
3771 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3772
3773int
3774safe_cancel (Coro::State self, ...)
3775 C_ARGS: aTHX_ self, &ST (1), items - 1
3776
3777void
3778schedule (...)
3779 CODE:
3780 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3781
3782void
3783schedule_to (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3786
3787void
3788cede_to (...)
3789 CODE:
3790 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3791
3792void
3793cede (...)
3794 CODE:
3795 CORO_EXECUTE_SLF_XS (slf_init_cede);
3796
3797void
3798cede_notself (...)
3799 CODE:
3800 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3801
3802void
3803_set_current (SV *current)
3804 PROTOTYPE: $
3805 CODE:
3806 SvREFCNT_dec (SvRV (coro_current));
3807 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3808
3809void
3810_set_readyhook (SV *hook)
3811 PROTOTYPE: $
3812 CODE:
3813 SvREFCNT_dec (coro_readyhook);
3814 SvGETMAGIC (hook);
3815 if (SvOK (hook))
3816 {
3817 coro_readyhook = newSVsv (hook);
3818 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3819 }
3820 else
3821 {
3822 coro_readyhook = 0;
3823 CORO_READYHOOK = 0;
3824 }
3825
3826int
3827prio (Coro::State coro, int newprio = 0)
3828 PROTOTYPE: $;$
3829 ALIAS:
3830 nice = 1
3831 CODE:
3832{
3833 RETVAL = coro->prio;
3834
3835 if (items > 1)
3836 {
3837 if (ix)
3838 newprio = coro->prio - newprio;
3839
3840 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3841 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3842
3843 coro->prio = newprio;
3844 }
3845}
3846 OUTPUT:
3847 RETVAL
3848
3849SV *
3850ready (SV *self)
3851 PROTOTYPE: $
3852 CODE:
3853 RETVAL = boolSV (api_ready (aTHX_ self));
3854 OUTPUT:
3855 RETVAL
3856
3857int
1132nready(...) 3858nready (...)
1133 PROTOTYPE: 3859 PROTOTYPE:
1134 CODE: 3860 CODE:
1135 RETVAL = coro_nready; 3861 RETVAL = coro_nready;
1136 OUTPUT: 3862 OUTPUT:
1137 RETVAL 3863 RETVAL
1138 3864
1139void 3865void
1140schedule(...) 3866suspend (Coro::State self)
1141 PROTOTYPE: 3867 PROTOTYPE: $
1142 CODE: 3868 CODE:
1143 api_schedule (); 3869 self->flags |= CF_SUSPENDED;
1144 3870
1145void 3871void
1146cede(...) 3872resume (Coro::State self)
1147 PROTOTYPE: 3873 PROTOTYPE: $
1148 CODE: 3874 CODE:
3875 self->flags &= ~CF_SUSPENDED;
3876
3877void
3878_pool_handler (...)
3879 CODE:
3880 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3881
3882void
3883async_pool (SV *cv, ...)
3884 PROTOTYPE: &@
3885 PPCODE:
3886{
3887 HV *hv = (HV *)av_pop (av_async_pool);
3888 AV *av = newAV ();
3889 SV *cb = ST (0);
3890 int i;
3891
3892 av_extend (av, items - 2);
3893 for (i = 1; i < items; ++i)
3894 av_push (av, SvREFCNT_inc_NN (ST (i)));
3895
3896 if ((SV *)hv == &PL_sv_undef)
3897 {
3898 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3899 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3900 SvREFCNT_dec (sv);
3901 }
3902
3903 {
3904 struct coro *coro = SvSTATE_hv (hv);
3905
3906 assert (!coro->invoke_cb);
3907 assert (!coro->invoke_av);
3908 coro->invoke_cb = SvREFCNT_inc (cb);
3909 coro->invoke_av = av;
3910 }
3911
3912 api_ready (aTHX_ (SV *)hv);
3913
3914 if (GIMME_V != G_VOID)
3915 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3916 else
3917 SvREFCNT_dec (hv);
3918}
3919
3920SV *
3921rouse_cb ()
3922 PROTOTYPE:
3923 CODE:
3924 RETVAL = coro_new_rouse_cb (aTHX);
3925 OUTPUT:
3926 RETVAL
3927
3928void
3929rouse_wait (...)
3930 PROTOTYPE: ;$
3931 PPCODE:
3932 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3933
3934void
3935on_enter (SV *block)
3936 ALIAS:
3937 on_leave = 1
3938 PROTOTYPE: &
3939 CODE:
3940{
3941 struct coro *coro = SvSTATE_current;
3942 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3943
3944 block = s_get_cv_croak (block);
3945
3946 if (!*avp)
3947 *avp = newAV ();
3948
3949 av_push (*avp, SvREFCNT_inc (block));
3950
3951 if (!ix)
3952 on_enterleave_call (aTHX_ block);
3953
3954 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3955 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3956 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3957}
3958
3959
3960MODULE = Coro::State PACKAGE = PerlIO::cede
3961
3962BOOT:
3963 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3964
3965
3966MODULE = Coro::State PACKAGE = Coro::Semaphore
3967
3968SV *
3969new (SV *klass, SV *count = 0)
3970 CODE:
3971{
3972 int semcnt = 1;
3973
3974 if (count)
3975 {
3976 SvGETMAGIC (count);
3977
3978 if (SvOK (count))
3979 semcnt = SvIV (count);
3980 }
3981
3982 RETVAL = sv_bless (
3983 coro_waitarray_new (aTHX_ semcnt),
3984 GvSTASH (CvGV (cv))
3985 );
3986}
3987 OUTPUT:
3988 RETVAL
3989
3990# helper for Coro::Channel and others
3991SV *
3992_alloc (int count)
3993 CODE:
3994 RETVAL = coro_waitarray_new (aTHX_ count);
3995 OUTPUT:
3996 RETVAL
3997
3998SV *
3999count (SV *self)
4000 CODE:
4001 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4002 OUTPUT:
4003 RETVAL
4004
4005void
4006up (SV *self, int adjust = 1)
4007 ALIAS:
4008 adjust = 1
4009 CODE:
4010 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4011
4012void
4013down (...)
4014 CODE:
4015 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4016
4017void
4018wait (...)
4019 CODE:
4020 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4021
4022void
4023try (SV *self)
4024 PPCODE:
4025{
4026 AV *av = (AV *)SvRV (self);
4027 SV *count_sv = AvARRAY (av)[0];
4028 IV count = SvIVX (count_sv);
4029
4030 if (count > 0)
4031 {
4032 --count;
4033 SvIVX (count_sv) = count;
4034 XSRETURN_YES;
4035 }
4036 else
4037 XSRETURN_NO;
4038}
4039
4040void
4041waiters (SV *self)
4042 PPCODE:
4043{
4044 AV *av = (AV *)SvRV (self);
4045 int wcount = AvFILLp (av) + 1 - 1;
4046
4047 if (GIMME_V == G_SCALAR)
4048 XPUSHs (sv_2mortal (newSViv (wcount)));
4049 else
4050 {
4051 int i;
4052 EXTEND (SP, wcount);
4053 for (i = 1; i <= wcount; ++i)
4054 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4055 }
4056}
4057
4058MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4059
4060void
4061_may_delete (SV *sem, int count, int extra_refs)
4062 PPCODE:
4063{
4064 AV *av = (AV *)SvRV (sem);
4065
4066 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4067 && AvFILLp (av) == 0 /* no waiters, just count */
4068 && SvIV (AvARRAY (av)[0]) == count)
4069 XSRETURN_YES;
4070
4071 XSRETURN_NO;
4072}
4073
4074MODULE = Coro::State PACKAGE = Coro::Signal
4075
4076SV *
4077new (SV *klass)
4078 CODE:
4079 RETVAL = sv_bless (
4080 coro_waitarray_new (aTHX_ 0),
4081 GvSTASH (CvGV (cv))
4082 );
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087wait (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4090
4091void
4092broadcast (SV *self)
4093 CODE:
4094{
4095 AV *av = (AV *)SvRV (self);
4096 coro_signal_wake (aTHX_ av, AvFILLp (av));
4097}
4098
4099void
4100send (SV *self)
4101 CODE:
4102{
4103 AV *av = (AV *)SvRV (self);
4104
4105 if (AvFILLp (av))
4106 coro_signal_wake (aTHX_ av, 1);
4107 else
4108 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4109}
4110
4111IV
4112awaited (SV *self)
4113 CODE:
4114 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4115 OUTPUT:
4116 RETVAL
4117
4118
4119MODULE = Coro::State PACKAGE = Coro::AnyEvent
4120
4121BOOT:
4122 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4123
4124void
4125_schedule (...)
4126 CODE:
4127{
4128 static int incede;
4129
1149 api_cede (); 4130 api_cede_notself (aTHX);
1150 4131
4132 ++incede;
4133 while (coro_nready >= incede && api_cede (aTHX))
4134 ;
4135
4136 sv_setsv (sv_activity, &PL_sv_undef);
4137 if (coro_nready >= incede)
4138 {
4139 PUSHMARK (SP);
4140 PUTBACK;
4141 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4142 }
4143
4144 --incede;
4145}
4146
4147
4148MODULE = Coro::State PACKAGE = Coro::AIO
4149
4150void
4151_register (char *target, char *proto, SV *req)
4152 CODE:
4153{
4154 SV *req_cv = s_get_cv_croak (req);
4155 /* newXSproto doesn't return the CV on 5.8 */
4156 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4157 sv_setpv ((SV *)slf_cv, proto);
4158 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4159}
4160
4161MODULE = Coro::State PACKAGE = Coro::Select
4162
4163void
4164patch_pp_sselect ()
4165 CODE:
4166 if (!coro_old_pp_sselect)
4167 {
4168 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4169 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4170 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4171 }
4172
4173void
4174unpatch_pp_sselect ()
4175 CODE:
4176 if (coro_old_pp_sselect)
4177 {
4178 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4179 coro_old_pp_sselect = 0;
4180 }
4181

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