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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.400 by root, Thu May 12 23:55:39 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
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8
9#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14
15#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
35 17
36#include <stdio.h> 18#include <stdio.h>
37#include <errno.h> 19#include <errno.h>
20#include <assert.h>
38 21
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 22#ifndef SVs_PADSTALE
40# undef STACKGUARD 23# define SVs_PADSTALE 0
41#endif 24#endif
42 25
43#ifndef STACKGUARD 26#if defined(_WIN32)
44# define STACKGUARD 0 27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
45#endif 34#endif
46 35
47#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
48# include <unistd.h> 37# include <unistd.h>
49# include <sys/mman.h> 38# include <sys/mman.h>
… …
58# ifndef PAGESIZE 47# ifndef PAGESIZE
59# define PAGESIZE pagesize 48# define PAGESIZE pagesize
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 49# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize; 50static long pagesize;
62# else 51# else
63# define BOOT_PAGESIZE 52# define BOOT_PAGESIZE (void)0
53# endif
54#else
55# define PAGESIZE 0
56# define BOOT_PAGESIZE (void)0
57#endif
58
59#if CORO_USE_VALGRIND
60# include <valgrind/valgrind.h>
61#endif
62
63/* the maximum number of idle cctx that will be pooled */
64static int cctx_max_idle = 4;
65
66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
67# undef CORO_STACKGUARD
68#endif
69
70#ifndef CORO_STACKGUARD
71# define CORO_STACKGUARD 0
72#endif
73
74/* prefer perl internal functions over our own? */
75#ifndef CORO_PREFER_PERL_FUNCTIONS
76# define CORO_PREFER_PERL_FUNCTIONS 0
77#endif
78
79/* The next macros try to return the current stack pointer, in an as
80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
85# define dSTACKLEVEL volatile void *stacklevel
86# define STACKLEVEL ((void *)&stacklevel)
87#endif
88
89#define IN_DESTRUCT PL_dirty
90
91#if __GNUC__ >= 3
92# define attribute(x) __attribute__(x)
93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
95#else
96# define attribute(x)
97# define expect(expr,value) (expr)
98# define INLINE static
99#endif
100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
104#define NOINLINE attribute ((noinline))
105
106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
108
109#ifdef USE_ITHREADS
110# if CORO_PTHREAD
111static void *coro_thx;
64# endif 112# endif
65#endif 113#endif
66 114
67/* The next macro should declare a variable stacklevel that contains and approximation 115#ifdef __linux
68 * to the current C stack pointer. Its property is that it changes with each call 116# include <time.h> /* for timespec */
69 * and should be unique. */ 117# include <syscall.h> /* for SYS_* */
70#define dSTACKLEVEL int stacklevel 118# ifdef SYS_clock_gettime
71#define STACKLEVEL ((void *)&stacklevel) 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
72 120# define CORO_CLOCK_MONOTONIC 1
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
74 122# endif
75#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x)
77#else
78# define attribute(x)
79#endif 123#endif
80 124
81#define NOINLINE attribute ((noinline)) 125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
82 127
83#include "CoroAPI.h" 128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131static void slf_destroy (pTHX_ struct coro *coro);
84 132
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */ 133static U32 cctx_gen;
86 134static size_t cctx_stacksize = CORO_STACKSIZE;
87#ifdef USE_ITHREADS
88static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else
92# define LOCK (void)0
93# define UNLOCK (void)0
94#endif
95
96static struct CoroAPI coroapi; 135static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 136static AV *main_mainstack; /* used to differentiate between $main and others */
137static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 138static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 139static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
140
141static AV *av_destroy; /* destruction queue */
142static SV *sv_manager; /* the manager coro */
143static SV *sv_idle; /* $Coro::idle */
144
145static GV *irsgv; /* $/ */
146static GV *stdoutgv; /* *STDOUT */
147static SV *rv_diehook;
148static SV *rv_warnhook;
149static HV *hv_sig; /* %SIG */
150
151/* async_pool helper stuff */
152static SV *sv_pool_rss;
153static SV *sv_pool_size;
154static SV *sv_async_pool_idle; /* description string */
155static AV *av_async_pool; /* idle pool */
156static SV *sv_Coro; /* class string */
157static CV *cv_pool_handler;
158
159/* Coro::AnyEvent */
160static SV *sv_activity;
161
162/* enable processtime/realtime profiling */
163static char enable_times;
164typedef U32 coro_ts[2];
165static coro_ts time_real, time_cpu;
166static char times_valid;
167
168static struct coro_cctx *cctx_first;
169static int cctx_count, cctx_idle;
170
171enum
172{
173 CC_MAPPED = 0x01,
174 CC_NOREUSE = 0x02, /* throw this away after tracing */
175 CC_TRACE = 0x04,
176 CC_TRACE_SUB = 0x08, /* trace sub calls */
177 CC_TRACE_LINE = 0x10, /* trace each statement */
178 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
179};
100 180
101/* this is a structure representing a c-level coroutine */ 181/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 182typedef struct coro_cctx
183{
103 struct coro_stack *next; 184 struct coro_cctx *next;
104 185
105 /* the stack */ 186 /* the stack */
106 void *sptr; 187 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 188 size_t ssize;
108 189
109 /* cpu state */ 190 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 191 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
192 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 193 JMPENV *top_env;
112 coro_context cctx; 194 coro_context cctx;
113} coro_stack; 195
196 U32 gen;
197#if CORO_USE_VALGRIND
198 int valgrind_id;
199#endif
200 unsigned char flags;
201} coro_cctx;
202
203static coro_cctx *cctx_current; /* the currently running cctx */
204
205/*****************************************************************************/
206
207static MGVTBL coro_state_vtbl;
208
209enum
210{
211 CF_RUNNING = 0x0001, /* coroutine is running */
212 CF_READY = 0x0002, /* coroutine is ready */
213 CF_NEW = 0x0004, /* has never been switched to */
214 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
215 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
216 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
217};
218
219/* the structure where most of the perl state is stored, overlaid on the cxstack */
220typedef struct
221{
222 SV *defsv;
223 AV *defav;
224 SV *errsv;
225 SV *irsgv;
226 HV *hinthv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
231
232// how many context stack entries do we need for perl_slots
233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 234
115/* this is a structure representing a perl-level coroutine */ 235/* this is a structure representing a perl-level coroutine */
116struct coro { 236struct coro
237{
117 /* the c coroutine allocated to this perl coroutine, if any */ 238 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 239 coro_cctx *cctx;
119 240
120 /* data associated with this coroutine (initial args) */ 241 /* ready queue */
121 AV *args; 242 struct coro *next_ready;
122 int refcnt;
123 243
124 /* optionally saved, might be zero */ 244 /* state data */
125 AV *defav; 245 struct CoroSLF slf_frame; /* saved slf frame */
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 246 AV *mainstack;
137 SV **stack_sp; 247 perl_slots *slot; /* basically the saved sp */
138 OP *op; 248
139 SV **curpad; 249 CV *startcv; /* the CV to execute */
140 AV *comppad; 250 AV *args; /* data associated with this coroutine (initial args) */
141 CV *compcv; 251 int flags; /* CF_ flags */
142 SV **stack_base; 252 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 253
144 SV **tmps_stack; 254 /* statistics */
145 I32 tmps_floor; 255 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 256
163 /* coro process data */ 257 /* coro process data */
164 int prio; 258 int prio;
259 SV *except; /* exception to be thrown */
260 SV *rouse_cb; /* last rouse callback */
261 AV *on_destroy; /* callbacks or coros to notify on destroy */
262 AV *status; /* the exit status list */
263
264 /* async_pool */
265 SV *saved_deffh;
266 SV *invoke_cb;
267 AV *invoke_av;
268
269 /* on_enter/on_leave */
270 AV *on_enter;
271 AV *on_leave;
272
273 /* swap_sv */
274 AV *swap_sv;
275
276 /* times */
277 coro_ts t_cpu, t_real;
278
279 /* linked list */
280 struct coro *next, *prev;
165}; 281};
166 282
167typedef struct coro *Coro__State; 283typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 284typedef struct coro *Coro__State_or_hashref;
169 285
286/* the following variables are effectively part of the perl context */
287/* and get copied between struct coro and these variables */
288/* the main reason we don't support windows process emulation */
289static struct CoroSLF slf_frame; /* the current slf frame */
290
291/** Coro ********************************************************************/
292
293#define CORO_PRIO_MAX 3
294#define CORO_PRIO_HIGH 1
295#define CORO_PRIO_NORMAL 0
296#define CORO_PRIO_LOW -1
297#define CORO_PRIO_IDLE -3
298#define CORO_PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
304static CV *cv_coro_run;
305static struct coro *coro_first;
306#define coro_nready coroapi.nready
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332static void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342static double
343coro_nvtime ()
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351static void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360static void
361time_init (pTHX)
362{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
379
380/** lowlevel stuff **********************************************************/
381
382static SV *
383coro_get_sv (pTHX_ const char *name, int create)
384{
385#if PERL_VERSION_ATLEAST (5,10,0)
386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
387 get_sv (name, create);
388#endif
389 return get_sv (name, create);
390}
391
170static AV * 392static AV *
393coro_get_av (pTHX_ const char *name, int create)
394{
395#if PERL_VERSION_ATLEAST (5,10,0)
396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
397 get_av (name, create);
398#endif
399 return get_av (name, create);
400}
401
402static HV *
403coro_get_hv (pTHX_ const char *name, int create)
404{
405#if PERL_VERSION_ATLEAST (5,10,0)
406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
407 get_hv (name, create);
408#endif
409 return get_hv (name, create);
410}
411
412INLINE void
413coro_times_update ()
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435INLINE void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447INLINE void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478INLINE MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493INLINE struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517static AV *
171coro_clone_padlist (CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
172{ 519{
173 AV *padlist = CvPADLIST (cv); 520 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 521 AV *newpadlist, *newpad;
175 522
176 newpadlist = newAV (); 523 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 524 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 525#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 526 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 527#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 528 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 529#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 530 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 531 --AvFILLp (padlist);
185 532
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 533 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
187 av_store (newpadlist, 1, (SV *)newpad); 534 av_store (newpadlist, 1, (SV *)newpad);
188 535
189 return newpadlist; 536 return newpadlist;
190} 537}
191 538
192static void 539static void
193free_padlist (AV *padlist) 540free_padlist (pTHX_ AV *padlist)
194{ 541{
195 /* may be during global destruction */ 542 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 543 if (!IN_DESTRUCT)
197 { 544 {
198 I32 i = AvFILLp (padlist); 545 I32 i = AvFILLp (padlist);
199 while (i >= 0) 546
547 while (i > 0) /* special-case index 0 */
200 { 548 {
201 SV **svp = av_fetch (padlist, i--, FALSE); 549 /* we try to be extra-careful here */
202 if (svp) 550 AV *av = (AV *)AvARRAY (padlist)[i--];
203 { 551 I32 j = AvFILLp (av);
204 SV *sv; 552
205 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 553 while (j >= 0)
554 SvREFCNT_dec (AvARRAY (av)[j--]);
555
556 AvFILLp (av) = -1;
206 SvREFCNT_dec (sv); 557 SvREFCNT_dec (av);
207
208 SvREFCNT_dec (*svp);
209 }
210 } 558 }
211 559
560 SvREFCNT_dec (AvARRAY (padlist)[0]);
561
562 AvFILLp (padlist) = -1;
212 SvREFCNT_dec ((SV*)padlist); 563 SvREFCNT_dec ((SV*)padlist);
213 } 564 }
214} 565}
215 566
216static int 567static int
217coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 568coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
218{ 569{
219 AV *padlist; 570 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 571 AV *av = (AV *)mg->mg_obj;
221 572
573 /* perl manages to free our internal AV and _then_ call us */
574 if (IN_DESTRUCT)
575 return 0;
576
222 /* casting is fun. */ 577 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 578 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 579 free_padlist (aTHX_ padlist);
225 580
226 SvREFCNT_dec (av); 581 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 582
228 return 0; 583 return 0;
229} 584}
230 585
231#define PERL_MAGIC_coro PERL_MAGIC_ext 586static MGVTBL coro_cv_vtbl = {
232 587 0, 0, 0, 0,
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 588 coro_cv_free
589};
234 590
235/* the next two functions merely cache the padlists */ 591/* the next two functions merely cache the padlists */
236static void 592static void
237get_padlist (CV *cv) 593get_padlist (pTHX_ CV *cv)
238{ 594{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 595 MAGIC *mg = CORO_MAGIC_cv (cv);
596 AV *av;
240 597
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 598 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 599 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 600 else
244 { 601 {
245#if 0 602#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 603 /* this is probably cleaner? but also slower! */
604 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 605 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 606 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 607 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 608 SvREFCNT_dec (cp);
251#else 609#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 610 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 611#endif
254 } 612 }
255} 613}
256 614
257static void 615static void
258put_padlist (CV *cv) 616put_padlist (pTHX_ CV *cv)
259{ 617{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 618 MAGIC *mg = CORO_MAGIC_cv (cv);
619 AV *av;
261 620
262 if (!mg) 621 if (expect_false (!mg))
622 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
623
624 av = (AV *)mg->mg_obj;
625
626 if (expect_false (AvFILLp (av) >= AvMAX (av)))
627 av_extend (av, AvFILLp (av) + 1);
628
629 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
630}
631
632/** load & save, init *******************************************************/
633
634/* swap sv heads, at least logically */
635static void
636swap_svs (pTHX_ Coro__State c)
637{
638 int i;
639
640 for (i = 0; i <= AvFILLp (c->swap_sv); )
641 {
642 SV *a = AvARRAY (c->swap_sv)[i++];
643 SV *b = AvARRAY (c->swap_sv)[i++];
644
645 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
646 SV tmp;
647
648 /* swap sv_any */
649 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
650
651 /* swap sv_flags */
652 SvFLAGS (&tmp) = SvFLAGS (a);
653 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
654 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
655
656#if PERL_VERSION_ATLEAST (5,10,0)
657 /* perl 5.10 complicates this _quite_ a bit, but it also is
658 * much faster, so no quarrels here. alternatively, we could
659 * sv_upgrade to avoid this.
660 */
263 { 661 {
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 662 /* swap sv_u */
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 663 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
266 mg->mg_virtual = &vtbl_coro; 664
267 mg->mg_obj = (SV *)newAV (); 665 /* if SvANY points to the head, we need to adjust the pointers,
666 * as the pointer for a still points to b, and maybe vice versa.
667 */
668 #define svany_in_head(type) \
669 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
670
671 if (svany_in_head (SvTYPE (a)))
672 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
673
674 if (svany_in_head (SvTYPE (b)))
675 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
268 } 676 }
269 677#endif
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 678 }
271} 679}
272 680
273#define SB do { 681#define SWAP_SVS(coro) \
274#define SE } while (0) 682 if (expect_false ((coro)->swap_sv)) \
683 swap_svs (aTHX_ (coro))
275 684
276#define LOAD(state) load_state((state));
277#define SAVE(state,flags) save_state((state),(flags));
278
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
280
281static void 685static void
686on_enterleave_call (pTHX_ SV *cb);
687
688static void
282load_state(Coro__State c) 689load_perl (pTHX_ Coro__State c)
283{ 690{
284 PL_dowarn = c->dowarn; 691 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 692 c->slot = 0;
286 693
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 694 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 695
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 696 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 697 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 698 GvSV (PL_errgv) = slot->errsv;
699 GvSV (irsgv) = slot->irsgv;
700 GvHV (PL_hintgv) = slot->hinthv;
701
702 #define VAR(name,type) PL_ ## name = slot->name;
703 # include "state.h"
704 #undef VAR
321 705
322 { 706 {
323 dSP; 707 dSP;
708
324 CV *cv; 709 CV *cv;
325 710
326 /* now do the ugly restore mess */ 711 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 712 while (expect_true (cv = (CV *)POPs))
328 { 713 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 714 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 715 CvDEPTH (cv) = PTR2IV (POPs);
335 } 716 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 717 }
339 718
340 PUTBACK; 719 PUTBACK;
341 } 720 }
342}
343 721
722 slf_frame = c->slf_frame;
723 CORO_THROW = c->except;
724
725 if (expect_false (enable_times))
726 {
727 if (expect_false (!times_valid))
728 coro_times_update ();
729
730 coro_times_sub (c);
731 }
732
733 if (expect_false (c->on_enter))
734 {
735 int i;
736
737 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
738 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
739 }
740
741 SWAP_SVS (c);
742}
743
344static void 744static void
345save_state(Coro__State c, int flags) 745save_perl (pTHX_ Coro__State c)
346{ 746{
747 SWAP_SVS (c);
748
749 if (expect_false (c->on_leave))
750 {
751 int i;
752
753 for (i = AvFILLp (c->on_leave); i >= 0; --i)
754 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
755 }
756
757 times_valid = 0;
758
759 if (expect_false (enable_times))
760 {
761 coro_times_update (); times_valid = 1;
762 coro_times_add (c);
763 }
764
765 c->except = CORO_THROW;
766 c->slf_frame = slf_frame;
767
347 { 768 {
348 dSP; 769 dSP;
349 I32 cxix = cxstack_ix; 770 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 771 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 772 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 774 /*
354 * the worst thing you can imagine happens first - we have to save 775 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 776 * (and reinitialize) all cv's in the whole callchain :(
356 */ 777 */
357 778
358 PUSHs (Nullsv); 779 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 780 /* this loop was inspired by pp_caller */
360 for (;;) 781 for (;;)
361 { 782 {
362 while (cxix >= 0) 783 while (expect_true (cxix >= 0))
363 { 784 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 785 PERL_CONTEXT *cx = &ccstk[cxix--];
365 786
366 if (CxTYPE(cx) == CXt_SUB) 787 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 788 {
368 CV *cv = cx->blk_sub.cv; 789 CV *cv = cx->blk_sub.cv;
790
369 if (CvDEPTH(cv)) 791 if (expect_true (CvDEPTH (cv)))
370 { 792 {
371 EXTEND (SP, CvDEPTH(cv)*2); 793 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 794 PUSHs ((SV *)CvPADLIST (cv));
795 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 796 PUSHs ((SV *)cv);
382 797
798 CvDEPTH (cv) = 0;
383 get_padlist (cv); 799 get_padlist (aTHX_ cv);
384 } 800 }
385 } 801 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 802 }
395 803
396 if (top_si->si_type == PERLSI_MAIN) 804 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 805 break;
398 806
399 top_si = top_si->si_prev; 807 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 808 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 809 cxix = top_si->si_cxix;
402 } 810 }
403 811
404 PUTBACK; 812 PUTBACK;
405 } 813 }
406 814
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 815 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 816 if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 817 {
818 unsigned int i;
410 819
411 c->dowarn = PL_dowarn; 820 for (i = 0; i < SLOT_COUNT; ++i)
412 c->in_eval = PL_in_eval; 821 CXINC;
413 822
414 c->curstackinfo = PL_curstackinfo; 823 cxstack_ix -= SLOT_COUNT; /* undo allocation */
415 c->curstack = PL_curstack; 824 }
825
416 c->mainstack = PL_mainstack; 826 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 827
418 c->op = PL_op; 828 {
419 c->curpad = PL_curpad; 829 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 830
421 c->compcv = PL_compcv; 831 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 832 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 833 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 834 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 835 slot->hinthv = GvHV (PL_hintgv);
426 c->tmps_ix = PL_tmps_ix; 836
427 c->tmps_max = PL_tmps_max; 837 #define VAR(name,type) slot->name = PL_ ## name;
428 c->markstack = PL_markstack; 838 # include "state.h"
429 c->markstack_ptr = PL_markstack_ptr; 839 #undef VAR
430 c->markstack_max = PL_markstack_max; 840 }
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 841}
445 842
446/* 843/*
447 * allocate various perl stacks. This is an exact copy 844 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 845 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 846 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 847 * not usually need a lot of stackspace.
451 */ 848 */
849#if CORO_PREFER_PERL_FUNCTIONS
850# define coro_init_stacks(thx) init_stacks ()
851#else
452static void 852static void
453coro_init_stacks () 853coro_init_stacks (pTHX)
454{ 854{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 855 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
456 PL_curstackinfo->si_type = PERLSI_MAIN; 856 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 857 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 858 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 859
460 PL_stack_base = AvARRAY(PL_curstack); 860 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 861 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 862 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 863
464 New(50,PL_tmps_stack,96,SV*); 864 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 865 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 866 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 867 PL_tmps_max = 32;
468 868
469 New(54,PL_markstack,16,I32); 869 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 870 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 871 PL_markstack_max = PL_markstack + 16;
472 872
473#ifdef SET_MARK_OFFSET 873#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 874 SET_MARK_OFFSET;
475#endif 875#endif
476 876
477 New(54,PL_scopestack,16,I32); 877 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 878 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 879 PL_scopestack_max = 8;
480 880
481 New(54,PL_savestack,96,ANY); 881 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 882 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 883 PL_savestack_max = 24;
484 884
485#if !PERL_VERSION_ATLEAST (5,9,0) 885#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 886 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 887 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 888 PL_retstack_max = 4;
489#endif 889#endif
490} 890}
891#endif
491 892
492/* 893/*
493 * destroy the stacks, the callchain etc... 894 * destroy the stacks, the callchain etc...
494 */ 895 */
495static void 896static void
496coro_destroy_stacks() 897coro_destruct_stacks (pTHX)
497{ 898{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 899 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 900 PL_curstackinfo = PL_curstackinfo->si_next;
511 901
512 while (PL_curstackinfo) 902 while (PL_curstackinfo)
513 { 903 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 904 PERL_SI *p = PL_curstackinfo->si_prev;
515 905
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 906 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 907 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 908
528 Safefree (PL_curstackinfo->si_cxstack); 909 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 910 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 911 PL_curstackinfo = p;
531 } 912 }
532 913
533 Safefree (PL_tmps_stack); 914 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 915 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 916 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 917 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 918#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 919 Safefree (PL_retstack);
539#endif 920#endif
540} 921}
541 922
923#define CORO_RSS \
924 rss += sizeof (SYM (curstackinfo)); \
925 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
926 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
927 rss += SYM (tmps_max) * sizeof (SV *); \
928 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
929 rss += SYM (scopestack_max) * sizeof (I32); \
930 rss += SYM (savestack_max) * sizeof (ANY);
931
932static size_t
933coro_rss (pTHX_ struct coro *coro)
934{
935 size_t rss = sizeof (*coro);
936
937 if (coro->mainstack)
938 {
939 if (coro->flags & CF_RUNNING)
940 {
941 #define SYM(sym) PL_ ## sym
942 CORO_RSS;
943 #undef SYM
944 }
945 else
946 {
947 #define SYM(sym) coro->slot->sym
948 CORO_RSS;
949 #undef SYM
950 }
951 }
952
953 return rss;
954}
955
956/** coroutine stack handling ************************************************/
957
958static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
959static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
960static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
961
962/* apparently < 5.8.8 */
963#ifndef MgPV_nolen_const
964#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
965 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
966 (const char*)(mg)->mg_ptr)
967#endif
968
969/*
970 * This overrides the default magic get method of %SIG elements.
971 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
972 * and instead of trying to save and restore the hash elements, we just provide
973 * readback here.
974 */
542static void 975static int
543setup_coro (struct coro *coro) 976coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
977{
978 const char *s = MgPV_nolen_const (mg);
979
980 if (*s == '_')
981 {
982 SV **svp = 0;
983
984 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
985 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
986
987 if (svp)
988 {
989 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
990 return 0;
991 }
992 }
993
994 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
995}
996
997static int
998coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
999{
1000 const char *s = MgPV_nolen_const (mg);
1001
1002 if (*s == '_')
1003 {
1004 SV **svp = 0;
1005
1006 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1007 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1008
1009 if (svp)
1010 {
1011 SV *old = *svp;
1012 *svp = 0;
1013 SvREFCNT_dec (old);
1014 return 0;
1015 }
1016 }
1017
1018 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1019}
1020
1021static int
1022coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1023{
1024 const char *s = MgPV_nolen_const (mg);
1025
1026 if (*s == '_')
1027 {
1028 SV **svp = 0;
1029
1030 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1031 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1032
1033 if (svp)
1034 {
1035 SV *old = *svp;
1036 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1037 SvREFCNT_dec (old);
1038 return 0;
1039 }
1040 }
1041
1042 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1043}
1044
1045static void
1046prepare_nop (pTHX_ struct coro_transfer_args *ta)
1047{
1048 /* kind of mega-hacky, but works */
1049 ta->next = ta->prev = (struct coro *)ta;
1050}
1051
1052static int
1053slf_check_nop (pTHX_ struct CoroSLF *frame)
1054{
1055 return 0;
1056}
1057
1058static int
1059slf_check_repeat (pTHX_ struct CoroSLF *frame)
1060{
1061 return 1;
1062}
1063
1064static UNOP init_perl_op;
1065
1066static void NOINLINE /* noinline to keep it out of the transfer fast path */
1067init_perl (pTHX_ struct coro *coro)
544{ 1068{
545 /* 1069 /*
546 * emulate part of the perl startup here. 1070 * emulate part of the perl startup here.
547 */ 1071 */
548
549 coro_init_stacks (); 1072 coro_init_stacks (aTHX);
550 1073
1074 PL_runops = RUNOPS_DEFAULT;
1075 PL_curcop = &PL_compiling;
1076 PL_in_eval = EVAL_NULL;
551 PL_curcop = 0; 1077 PL_comppad = 0;
552 PL_in_eval = 0; 1078 PL_comppad_name = 0;
1079 PL_comppad_name_fill = 0;
1080 PL_comppad_name_floor = 0;
553 PL_curpm = 0; 1081 PL_curpm = 0;
1082 PL_curpad = 0;
1083 PL_localizing = 0;
1084 PL_restartop = 0;
1085#if PERL_VERSION_ATLEAST (5,10,0)
1086 PL_parser = 0;
1087#endif
1088 PL_hints = 0;
1089
1090 /* recreate the die/warn hooks */
1091 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1092 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1093
1094 GvSV (PL_defgv) = newSV (0);
1095 GvAV (PL_defgv) = coro->args; coro->args = 0;
1096 GvSV (PL_errgv) = newSV (0);
1097 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1098 GvHV (PL_hintgv) = 0;
1099 PL_rs = newSVsv (GvSV (irsgv));
1100 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
554 1101
555 { 1102 {
556 dSP; 1103 dSP;
557 LOGOP myop; 1104 UNOP myop;
558 1105
559 /* I have no idea why this is needed, but it is */ 1106 Zero (&myop, 1, UNOP);
1107 myop.op_next = Nullop;
1108 myop.op_type = OP_ENTERSUB;
1109 myop.op_flags = OPf_WANT_VOID;
1110
560 PUSHMARK (SP); 1111 PUSHMARK (SP);
561 1112 PUSHs ((SV *)coro->startcv);
562 SvREFCNT_dec (GvAV (PL_defgv)); 1113 PUTBACK;
563 GvAV (PL_defgv) = coro->args; coro->args = 0;
564
565 Zero (&myop, 1, LOGOP);
566 myop.op_next = Nullop;
567 myop.op_flags = OPf_WANT_VOID;
568
569 PL_op = (OP *)&myop; 1114 PL_op = (OP *)&myop;
570
571 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573 PUTBACK;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1115 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN;
576
577 ENTER; /* necessary e.g. for dounwind */
578 } 1116 }
579}
580 1117
1118 /* this newly created coroutine might be run on an existing cctx which most
1119 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1120 */
1121 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1122 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1123 slf_frame.destroy = 0;
1124
1125 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1126 init_perl_op.op_next = PL_op;
1127 init_perl_op.op_type = OP_ENTERSUB;
1128 init_perl_op.op_ppaddr = pp_slf;
1129 /* no flags etc. required, as an init function won't be called */
1130
1131 PL_op = (OP *)&init_perl_op;
1132
1133 /* copy throw, in case it was set before init_perl */
1134 CORO_THROW = coro->except;
1135
1136 SWAP_SVS (coro);
1137
1138 if (expect_false (enable_times))
1139 {
1140 coro_times_update ();
1141 coro_times_sub (coro);
1142 }
1143}
1144
581static void 1145static void
1146coro_unwind_stacks (pTHX)
1147{
1148 if (!IN_DESTRUCT)
1149 {
1150 /* restore all saved variables and stuff */
1151 LEAVE_SCOPE (0);
1152 assert (PL_tmps_floor == -1);
1153
1154 /* free all temporaries */
1155 FREETMPS;
1156 assert (PL_tmps_ix == -1);
1157
1158 /* unwind all extra stacks */
1159 POPSTACK_TO (PL_mainstack);
1160
1161 /* unwind main stack */
1162 dounwind (-1);
1163 }
1164}
1165
1166static void
1167destroy_perl (pTHX_ struct coro *coro)
1168{
1169 SV *svf [9];
1170
1171 {
1172 SV *old_current = SvRV (coro_current);
1173 struct coro *current = SvSTATE (old_current);
1174
1175 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1176
1177 save_perl (aTHX_ current);
1178
1179 /* this will cause transfer_check to croak on block*/
1180 SvRV_set (coro_current, (SV *)coro->hv);
1181
1182 load_perl (aTHX_ coro);
1183
1184 coro_unwind_stacks (aTHX);
1185
1186 /* restore swapped sv's */
1187 SWAP_SVS (coro);
1188
1189 coro_destruct_stacks (aTHX);
1190
1191 // now save some sv's to be free'd later
1192 svf [0] = GvSV (PL_defgv);
1193 svf [1] = (SV *)GvAV (PL_defgv);
1194 svf [2] = GvSV (PL_errgv);
1195 svf [3] = (SV *)PL_defoutgv;
1196 svf [4] = PL_rs;
1197 svf [5] = GvSV (irsgv);
1198 svf [6] = (SV *)GvHV (PL_hintgv);
1199 svf [7] = PL_diehook;
1200 svf [8] = PL_warnhook;
1201 assert (9 == sizeof (svf) / sizeof (*svf));
1202
1203 SvRV_set (coro_current, old_current);
1204
1205 load_perl (aTHX_ current);
1206 }
1207
1208 {
1209 unsigned int i;
1210
1211 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1212 SvREFCNT_dec (svf [i]);
1213
1214 SvREFCNT_dec (coro->saved_deffh);
1215 SvREFCNT_dec (coro->rouse_cb);
1216 SvREFCNT_dec (coro->invoke_cb);
1217 SvREFCNT_dec (coro->invoke_av);
1218 }
1219}
1220
1221INLINE void
582free_coro_mortal () 1222free_coro_mortal (pTHX)
583{ 1223{
584 if (coro_mortal) 1224 if (expect_true (coro_mortal))
585 { 1225 {
586 SvREFCNT_dec (coro_mortal); 1226 SvREFCNT_dec ((SV *)coro_mortal);
587 coro_mortal = 0; 1227 coro_mortal = 0;
588 } 1228 }
589} 1229}
590 1230
1231static int
1232runops_trace (pTHX)
1233{
1234 COP *oldcop = 0;
1235 int oldcxix = -2;
1236
1237 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1238 {
1239 PERL_ASYNC_CHECK ();
1240
1241 if (cctx_current->flags & CC_TRACE_ALL)
1242 {
1243 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1244 {
1245 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1246 SV **bot, **top;
1247 AV *av = newAV (); /* return values */
1248 SV **cb;
1249 dSP;
1250
1251 GV *gv = CvGV (cx->blk_sub.cv);
1252 SV *fullname = sv_2mortal (newSV (0));
1253 if (isGV (gv))
1254 gv_efullname3 (fullname, gv, 0);
1255
1256 bot = PL_stack_base + cx->blk_oldsp + 1;
1257 top = cx->blk_gimme == G_ARRAY ? SP + 1
1258 : cx->blk_gimme == G_SCALAR ? bot + 1
1259 : bot;
1260
1261 av_extend (av, top - bot);
1262 while (bot < top)
1263 av_push (av, SvREFCNT_inc_NN (*bot++));
1264
1265 PL_runops = RUNOPS_DEFAULT;
1266 ENTER;
1267 SAVETMPS;
1268 EXTEND (SP, 3);
1269 PUSHMARK (SP);
1270 PUSHs (&PL_sv_no);
1271 PUSHs (fullname);
1272 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1273 PUTBACK;
1274 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1275 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1276 SPAGAIN;
1277 FREETMPS;
1278 LEAVE;
1279 PL_runops = runops_trace;
1280 }
1281
1282 if (oldcop != PL_curcop)
1283 {
1284 oldcop = PL_curcop;
1285
1286 if (PL_curcop != &PL_compiling)
1287 {
1288 SV **cb;
1289
1290 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1291 {
1292 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1293
1294 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1295 {
1296 dSP;
1297 GV *gv = CvGV (cx->blk_sub.cv);
1298 SV *fullname = sv_2mortal (newSV (0));
1299
1300 if (isGV (gv))
1301 gv_efullname3 (fullname, gv, 0);
1302
1303 PL_runops = RUNOPS_DEFAULT;
1304 ENTER;
1305 SAVETMPS;
1306 EXTEND (SP, 3);
1307 PUSHMARK (SP);
1308 PUSHs (&PL_sv_yes);
1309 PUSHs (fullname);
1310 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1311 PUTBACK;
1312 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1313 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1314 SPAGAIN;
1315 FREETMPS;
1316 LEAVE;
1317 PL_runops = runops_trace;
1318 }
1319
1320 oldcxix = cxstack_ix;
1321 }
1322
1323 if (cctx_current->flags & CC_TRACE_LINE)
1324 {
1325 dSP;
1326
1327 PL_runops = RUNOPS_DEFAULT;
1328 ENTER;
1329 SAVETMPS;
1330 EXTEND (SP, 3);
1331 PL_runops = RUNOPS_DEFAULT;
1332 PUSHMARK (SP);
1333 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1334 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1335 PUTBACK;
1336 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1337 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1338 SPAGAIN;
1339 FREETMPS;
1340 LEAVE;
1341 PL_runops = runops_trace;
1342 }
1343 }
1344 }
1345 }
1346 }
1347
1348 TAINT_NOT;
1349 return 0;
1350}
1351
1352static struct CoroSLF cctx_ssl_frame;
1353
1354static void
1355slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1356{
1357 ta->prev = 0;
1358}
1359
1360static int
1361slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1362{
1363 *frame = cctx_ssl_frame;
1364
1365 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1366}
1367
1368/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
591static void NOINLINE 1369static void NOINLINE
592prepare_cctx (coro_stack *cctx) 1370cctx_prepare (pTHX)
593{ 1371{
594 dSP;
595 LOGOP myop;
596
597 Zero (&myop, 1, LOGOP);
598 myop.op_next = PL_op;
599 myop.op_flags = OPf_WANT_VOID;
600
601 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602
603 PUSHMARK (SP);
604 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
605 PUTBACK;
606 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
607 SPAGAIN;
608}
609
610static void
611coro_run (void *arg)
612{
613 /* coro_run is the alternative epilogue of transfer() */
614 UNLOCK;
615
616 /*
617 * this is a _very_ stripped down perl interpreter ;)
618 */
619 PL_top_env = &PL_start_env; 1372 PL_top_env = &PL_start_env;
1373
1374 if (cctx_current->flags & CC_TRACE)
1375 PL_runops = runops_trace;
1376
1377 /* we already must be executing an SLF op, there is no other valid way
1378 * that can lead to creation of a new cctx */
1379 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1380 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1381
1382 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1383 cctx_ssl_frame = slf_frame;
1384
1385 slf_frame.prepare = slf_prepare_set_stacklevel;
1386 slf_frame.check = slf_check_set_stacklevel;
1387}
1388
1389/* the tail of transfer: execute stuff we can only do after a transfer */
1390INLINE void
1391transfer_tail (pTHX)
1392{
1393 free_coro_mortal (aTHX);
1394}
1395
1396/*
1397 * this is a _very_ stripped down perl interpreter ;)
1398 */
1399static void
1400cctx_run (void *arg)
1401{
1402#ifdef USE_ITHREADS
1403# if CORO_PTHREAD
1404 PERL_SET_CONTEXT (coro_thx);
1405# endif
1406#endif
1407 {
1408 dTHX;
1409
1410 /* normally we would need to skip the entersub here */
1411 /* not doing so will re-execute it, which is exactly what we want */
1412 /* PL_nop = PL_nop->op_next */
1413
620 /* inject call to cctx_init */ 1414 /* inject a fake subroutine call to cctx_init */
621 prepare_cctx ((coro_stack *)arg); 1415 cctx_prepare (aTHX);
622 1416
1417 /* cctx_run is the alternative tail of transfer() */
1418 transfer_tail (aTHX);
1419
623 /* somebody will hit me for both perl_run and PL_restartop */ 1420 /* somebody or something will hit me for both perl_run and PL_restartop */
1421 PL_restartop = PL_op;
624 perl_run (PL_curinterp); 1422 perl_run (PL_curinterp);
1423 /*
1424 * Unfortunately, there is no way to get at the return values of the
1425 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1426 * runtime errors here, as this is just a random interpreter, not a thread.
1427 */
625 1428
626 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1429 /*
627 abort (); 1430 * If perl-run returns we assume exit() was being called or the coro
1431 * fell off the end, which seems to be the only valid (non-bug)
1432 * reason for perl_run to return. We try to exit by jumping to the
1433 * bootstrap-time "top" top_env, as we cannot restore the "main"
1434 * coroutine as Coro has no such concept.
1435 * This actually isn't valid with the pthread backend, but OSes requiring
1436 * that backend are too broken to do it in a standards-compliant way.
1437 */
1438 PL_top_env = main_top_env;
1439 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1440 }
628} 1441}
629 1442
630static coro_stack * 1443static coro_cctx *
631stack_new () 1444cctx_new ()
632{ 1445{
633 coro_stack *stack; 1446 coro_cctx *cctx;
634 1447
1448 ++cctx_count;
635 New (0, stack, 1, coro_stack); 1449 New (0, cctx, 1, coro_cctx);
1450
1451 cctx->gen = cctx_gen;
1452 cctx->flags = 0;
1453 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1454
1455 return cctx;
1456}
1457
1458/* create a new cctx only suitable as source */
1459static coro_cctx *
1460cctx_new_empty ()
1461{
1462 coro_cctx *cctx = cctx_new ();
1463
1464 cctx->sptr = 0;
1465 coro_create (&cctx->cctx, 0, 0, 0, 0);
1466
1467 return cctx;
1468}
1469
1470/* create a new cctx suitable as destination/running a perl interpreter */
1471static coro_cctx *
1472cctx_new_run ()
1473{
1474 coro_cctx *cctx = cctx_new ();
1475 void *stack_start;
1476 size_t stack_size;
636 1477
637#if HAVE_MMAP 1478#if HAVE_MMAP
638
639 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1479 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640 /* mmap suppsedly does allocate-on-write for us */ 1480 /* mmap supposedly does allocate-on-write for us */
641 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1481 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642 1482
643 if (stack->sptr == (void *)-1) 1483 if (cctx->sptr != (void *)-1)
644 {
645 perror ("FATAL: unable to mmap stack for coroutine");
646 _exit (EXIT_FAILURE);
647 } 1484 {
648 1485 #if CORO_STACKGUARD
649# if STACKGUARD
650 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1486 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651# endif 1487 #endif
652 1488 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
653#else 1489 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654 1490 cctx->flags |= CC_MAPPED;
655 stack->ssize = STACKSIZE * (long)sizeof (long);
656 New (0, stack->sptr, STACKSIZE, long);
657
658 if (!stack->sptr)
659 { 1491 }
660 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1492 else
661 _exit (EXIT_FAILURE);
662 }
663
664#endif 1493#endif
1494 {
1495 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1496 New (0, cctx->sptr, cctx_stacksize, long);
665 1497
666 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1498 if (!cctx->sptr)
1499 {
1500 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1501 _exit (EXIT_FAILURE);
1502 }
667 1503
1504 stack_start = cctx->sptr;
1505 stack_size = cctx->ssize;
1506 }
1507
1508 #if CORO_USE_VALGRIND
1509 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1510 #endif
1511
1512 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1513
668 return stack; 1514 return cctx;
669} 1515}
670 1516
671static void 1517static void
672stack_free (coro_stack *stack) 1518cctx_destroy (coro_cctx *cctx)
673{ 1519{
674 if (!stack) 1520 if (!cctx)
675 return; 1521 return;
676 1522
1523 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1524
1525 --cctx_count;
1526 coro_destroy (&cctx->cctx);
1527
1528 /* coro_transfer creates new, empty cctx's */
1529 if (cctx->sptr)
1530 {
1531 #if CORO_USE_VALGRIND
1532 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1533 #endif
1534
677#if HAVE_MMAP 1535#if HAVE_MMAP
678 munmap (stack->sptr, stack->ssize); 1536 if (cctx->flags & CC_MAPPED)
679#else 1537 munmap (cctx->sptr, cctx->ssize);
680 Safefree (stack->sptr); 1538 else
681#endif 1539#endif
1540 Safefree (cctx->sptr);
1541 }
682 1542
683 Safefree (stack); 1543 Safefree (cctx);
684} 1544}
685 1545
686static coro_stack *stack_first; 1546/* wether this cctx should be destructed */
687static int cctx_count, cctx_idle; 1547#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
688 1548
689static coro_stack * 1549static coro_cctx *
690stack_get () 1550cctx_get (pTHX)
691{ 1551{
692 coro_stack *stack; 1552 while (expect_true (cctx_first))
693
694 if (stack_first)
695 { 1553 {
1554 coro_cctx *cctx = cctx_first;
1555 cctx_first = cctx->next;
696 --cctx_idle; 1556 --cctx_idle;
697 stack = stack_first; 1557
698 stack_first = stack->next; 1558 if (expect_true (!CCTX_EXPIRED (cctx)))
699 } 1559 return cctx;
700 else 1560
701 { 1561 cctx_destroy (cctx);
702 ++cctx_count;
703 stack = stack_new ();
704 PL_op = PL_op->op_next;
705 } 1562 }
706 1563
707 return stack; 1564 return cctx_new_run ();
708} 1565}
709 1566
710static void 1567static void
711stack_put (coro_stack *stack) 1568cctx_put (coro_cctx *cctx)
712{ 1569{
1570 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1571
1572 /* free another cctx if overlimit */
1573 if (expect_false (cctx_idle >= cctx_max_idle))
1574 {
1575 coro_cctx *first = cctx_first;
1576 cctx_first = first->next;
1577 --cctx_idle;
1578
1579 cctx_destroy (first);
1580 }
1581
713 ++cctx_idle; 1582 ++cctx_idle;
714 stack->next = stack_first; 1583 cctx->next = cctx_first;
715 stack_first = stack; 1584 cctx_first = cctx;
716} 1585}
717 1586
718/* never call directly, always through the coro_state_transfer global variable */ 1587/** coroutine switching *****************************************************/
719static void NOINLINE 1588
1589static void
1590transfer_check (pTHX_ struct coro *prev, struct coro *next)
1591{
1592 /* TODO: throwing up here is considered harmful */
1593
1594 if (expect_true (prev != next))
1595 {
1596 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1597 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1598
1599 if (expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1600 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1601
1602#if !PERL_VERSION_ATLEAST (5,10,0)
1603 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1604 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1605#endif
1606 }
1607}
1608
1609/* always use the TRANSFER macro */
1610static void NOINLINE /* noinline so we have a fixed stackframe */
720transfer (struct coro *prev, struct coro *next, int flags) 1611transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
721{ 1612{
722 dSTACKLEVEL; 1613 dSTACKLEVEL;
723 1614
724 /* sometimes transfer is only called to set idle_sp */ 1615 /* sometimes transfer is only called to set idle_sp */
725 if (flags == TRANSFER_SET_STACKLEVEL) 1616 if (expect_false (!prev))
726 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1617 {
727 else if (prev != next) 1618 cctx_current->idle_sp = STACKLEVEL;
1619 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
728 { 1620 }
729 coro_stack *prev__stack; 1621 else if (expect_true (prev != next))
1622 {
1623 coro_cctx *cctx_prev;
730 1624
731 LOCK; 1625 if (expect_false (prev->flags & CF_NEW))
732
733 if (next->mainstack)
734 { 1626 {
735 /* coroutine already started */ 1627 /* create a new empty/source context */
736 SAVE (prev, flags); 1628 prev->flags &= ~CF_NEW;
737 LOAD (next); 1629 prev->flags |= CF_RUNNING;
1630 }
1631
1632 prev->flags &= ~CF_RUNNING;
1633 next->flags |= CF_RUNNING;
1634
1635 /* first get rid of the old state */
1636 save_perl (aTHX_ prev);
1637
1638 if (expect_false (next->flags & CF_NEW))
1639 {
1640 /* need to start coroutine */
1641 next->flags &= ~CF_NEW;
1642 /* setup coroutine call */
1643 init_perl (aTHX_ next);
738 } 1644 }
739 else 1645 else
1646 load_perl (aTHX_ next);
1647
1648 /* possibly untie and reuse the cctx */
1649 if (expect_true (
1650 cctx_current->idle_sp == STACKLEVEL
1651 && !(cctx_current->flags & CC_TRACE)
1652 && !force_cctx
1653 ))
740 { 1654 {
741 /* need to start coroutine */ 1655 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
742 /* first get rid of the old state */ 1656 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
743 SAVE (prev, -1); 1657
744 /* setup coroutine call */ 1658 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
745 setup_coro (next); 1659 /* without this the next cctx_get might destroy the running cctx while still in use */
746 /* need a stack */ 1660 if (expect_false (CCTX_EXPIRED (cctx_current)))
747 next->stack = 0; 1661 if (expect_true (!next->cctx))
1662 next->cctx = cctx_get (aTHX);
1663
1664 cctx_put (cctx_current);
748 } 1665 }
1666 else
1667 prev->cctx = cctx_current;
749 1668
750 if (!prev->stack) 1669 ++next->usecount;
751 /* create a new empty context */
752 Newz (0, prev->stack, 1, coro_stack);
753 1670
754 prev__stack = prev->stack; 1671 cctx_prev = cctx_current;
1672 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
755 1673
756 /* possibly "free" the stack */ 1674 next->cctx = 0;
757 if (prev__stack->idle_sp == STACKLEVEL) 1675
1676 if (expect_false (cctx_prev != cctx_current))
758 { 1677 {
759 stack_put (prev__stack); 1678 cctx_prev->top_env = PL_top_env;
760 prev->stack = 0; 1679 PL_top_env = cctx_current->top_env;
1680 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
761 } 1681 }
762 1682
763 if (!next->stack) 1683 transfer_tail (aTHX);
764 next->stack = stack_get ();
765
766 if (prev__stack != next->stack)
767 {
768 prev__stack->top_env = PL_top_env;
769 PL_top_env = next->stack->top_env;
770 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
771 }
772
773 free_coro_mortal ();
774
775 UNLOCK;
776 } 1684 }
777} 1685}
778 1686
779struct transfer_args 1687#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
780{
781 struct coro *prev, *next;
782 int flags;
783};
784
785#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1688#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
786 1689
1690/** high level stuff ********************************************************/
1691
1692/* this function is actually Coro, not Coro::State, but we call it from here */
1693/* because it is convenient - but it hasn't been declared yet for that reason */
787static void 1694static void
1695coro_call_on_destroy (pTHX_ struct coro *coro);
1696
1697static void
788coro_state_destroy (struct coro *coro) 1698coro_state_destroy (pTHX_ struct coro *coro)
789{ 1699{
790 if (coro->refcnt--) 1700 if (coro->flags & CF_ZOMBIE)
791 return; 1701 return;
792 1702
793 if (coro->mainstack && coro->mainstack != main_mainstack) 1703 slf_destroy (aTHX_ coro);
794 {
795 struct coro temp;
796 1704
797 SAVE ((&temp), TRANSFER_SAVE_ALL); 1705 coro->flags |= CF_ZOMBIE;
798 LOAD (coro); 1706
799 1707 if (coro->flags & CF_READY)
800 coro_destroy_stacks ();
801
802 LOAD ((&temp)); /* this will get rid of defsv etc.. */
803
804 coro->mainstack = 0;
805 } 1708 {
1709 /* reduce nready, as destroying a ready coro effectively unreadies it */
1710 /* alternative: look through all ready queues and remove the coro */
1711 --coro_nready;
1712 }
1713 else
1714 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
806 1715
807 stack_free (coro->stack); 1716 if (coro->next) coro->next->prev = coro->prev;
1717 if (coro->prev) coro->prev->next = coro->next;
1718 if (coro == coro_first) coro_first = coro->next;
1719
1720 if (coro->mainstack
1721 && coro->mainstack != main_mainstack
1722 && coro->slot
1723 && !PL_dirty)
1724 destroy_perl (aTHX_ coro);
1725
1726 cctx_destroy (coro->cctx);
1727 SvREFCNT_dec (coro->startcv);
808 SvREFCNT_dec (coro->args); 1728 SvREFCNT_dec (coro->args);
809 Safefree (coro); 1729 SvREFCNT_dec (coro->swap_sv);
1730 SvREFCNT_dec (CORO_THROW);
1731
1732 coro_call_on_destroy (coro);
1733
1734 /* more destruction mayhem in coro_state_free */
810} 1735}
811 1736
812static int 1737static int
813coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1738coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814{ 1739{
815 struct coro *coro = (struct coro *)mg->mg_ptr; 1740 struct coro *coro = (struct coro *)mg->mg_ptr;
816 mg->mg_ptr = 0; 1741 mg->mg_ptr = 0;
817 1742
818 coro_state_destroy (coro); 1743 coro_state_destroy (coro);
1744 SvREFCNT_dec (coro->on_destroy);
1745 SvREFCNT_dec (coro->status);
1746
1747 Safefree (coro);
819 1748
820 return 0; 1749 return 0;
821} 1750}
822 1751
823static int 1752static int
824coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1753coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
825{ 1754{
826 struct coro *coro = (struct coro *)mg->mg_ptr; 1755 /* called when perl clones the current process the slow way (windows process emulation) */
827 1756 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
828 ++coro->refcnt; 1757 mg->mg_ptr = 0;
1758 mg->mg_virtual = 0;
829 1759
830 return 0; 1760 return 0;
831} 1761}
832 1762
833static MGVTBL coro_state_vtbl = { 1763static MGVTBL coro_state_vtbl = {
834 0, 0, 0, 0, 1764 0, 0, 0, 0,
835 coro_state_clear, 1765 coro_state_free,
836 0, 1766 0,
837#ifdef MGf_DUP 1767#ifdef MGf_DUP
838 coro_state_dup, 1768 coro_state_dup,
839#else 1769#else
840# define MGf_DUP 0 1770# define MGf_DUP 0
841#endif 1771#endif
842}; 1772};
843 1773
844static struct coro *
845SvSTATE (SV *coro)
846{
847 HV *stash;
848 MAGIC *mg;
849
850 if (SvROK (coro))
851 coro = SvRV (coro);
852
853 stash = SvSTASH (coro);
854 if (stash != coro_stash && stash != coro_state_stash)
855 {
856 /* very slow, but rare, check */
857 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858 croak ("Coro::State object required");
859 }
860
861 mg = SvMAGIC (coro);
862 assert (mg->mg_type == PERL_MAGIC_ext);
863 return (struct coro *)mg->mg_ptr;
864}
865
866static void 1774static void
867prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1775prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
868{ 1776{
869 ta->prev = SvSTATE (prev); 1777 ta->prev = SvSTATE (prev_sv);
870 ta->next = SvSTATE (next); 1778 ta->next = SvSTATE (next_sv);
871 ta->flags = flags; 1779 TRANSFER_CHECK (*ta);
872} 1780}
873 1781
874static void 1782static void
875api_transfer (SV *prev, SV *next, int flags) 1783api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1784{
1785 struct coro_transfer_args ta;
1786
1787 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1788 TRANSFER (ta, 1);
1789}
1790
1791/** Coro ********************************************************************/
1792
1793INLINE void
1794coro_enq (pTHX_ struct coro *coro)
1795{
1796 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1797
1798 SvREFCNT_inc_NN (coro->hv);
1799
1800 coro->next_ready = 0;
1801 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1802 ready [1] = coro;
1803}
1804
1805INLINE struct coro *
1806coro_deq (pTHX)
1807{
1808 int prio;
1809
1810 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1811 {
1812 struct coro **ready = coro_ready [prio];
1813
1814 if (ready [0])
1815 {
1816 struct coro *coro = ready [0];
1817 ready [0] = coro->next_ready;
1818 return coro;
1819 }
1820 }
1821
1822 return 0;
1823}
1824
1825static void
1826invoke_sv_ready_hook_helper (void)
876{ 1827{
877 dTHX; 1828 dTHX;
1829 dSP;
1830
1831 ENTER;
1832 SAVETMPS;
1833
1834 PUSHMARK (SP);
1835 PUTBACK;
1836 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1837
1838 FREETMPS;
1839 LEAVE;
1840}
1841
1842static int
1843api_ready (pTHX_ SV *coro_sv)
1844{
1845 struct coro *coro = SvSTATE (coro_sv);
1846
1847 if (coro->flags & CF_READY)
1848 return 0;
1849
1850 coro->flags |= CF_READY;
1851
1852 coro_enq (aTHX_ coro);
1853
1854 if (!coro_nready++)
1855 if (coroapi.readyhook)
1856 coroapi.readyhook ();
1857
1858 return 1;
1859}
1860
1861static int
1862api_is_ready (pTHX_ SV *coro_sv)
1863{
1864 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1865}
1866
1867/* expects to own a reference to next->hv */
1868INLINE void
1869prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1870{
1871 SV *prev_sv = SvRV (coro_current);
1872
1873 ta->prev = SvSTATE_hv (prev_sv);
1874 ta->next = next;
1875
1876 TRANSFER_CHECK (*ta);
1877
1878 SvRV_set (coro_current, (SV *)next->hv);
1879
1880 free_coro_mortal (aTHX);
1881 coro_mortal = prev_sv;
1882}
1883
1884static void
1885prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1886{
1887 for (;;)
1888 {
1889 struct coro *next = coro_deq (aTHX);
1890
1891 if (expect_true (next))
1892 {
1893 /* cannot transfer to destroyed coros, skip and look for next */
1894 if (expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1895 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1896 else
1897 {
1898 next->flags &= ~CF_READY;
1899 --coro_nready;
1900
1901 prepare_schedule_to (aTHX_ ta, next);
1902 break;
1903 }
1904 }
1905 else
1906 {
1907 /* nothing to schedule: call the idle handler */
1908 if (SvROK (sv_idle)
1909 && SvOBJECT (SvRV (sv_idle)))
1910 {
1911 if (SvRV (sv_idle) == SvRV (coro_current))
1912 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1913
1914 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1915 api_ready (aTHX_ SvRV (sv_idle));
1916 --coro_nready;
1917 }
1918 else
1919 {
1920 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1921 dSP;
1922
1923 ENTER;
1924 SAVETMPS;
1925
1926 PUSHMARK (SP);
1927 PUTBACK;
1928 call_sv (sv_idle, G_VOID | G_DISCARD);
1929
1930 FREETMPS;
1931 LEAVE;
1932 }
1933 }
1934 }
1935}
1936
1937INLINE void
1938prepare_cede (pTHX_ struct coro_transfer_args *ta)
1939{
1940 api_ready (aTHX_ coro_current);
1941 prepare_schedule (aTHX_ ta);
1942}
1943
1944INLINE void
1945prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1946{
1947 SV *prev = SvRV (coro_current);
1948
1949 if (coro_nready)
1950 {
1951 prepare_schedule (aTHX_ ta);
1952 api_ready (aTHX_ prev);
1953 }
1954 else
1955 prepare_nop (aTHX_ ta);
1956}
1957
1958static void
1959api_schedule (pTHX)
1960{
878 struct transfer_args ta; 1961 struct coro_transfer_args ta;
879 1962
880 prepare_transfer (&ta, prev, next, flags); 1963 prepare_schedule (aTHX_ &ta);
881 TRANSFER (ta); 1964 TRANSFER (ta, 1);
882} 1965}
883 1966
884/** Coro ********************************************************************/ 1967static void
1968api_schedule_to (pTHX_ SV *coro_sv)
1969{
1970 struct coro_transfer_args ta;
1971 struct coro *next = SvSTATE (coro_sv);
885 1972
886#define PRIO_MAX 3 1973 SvREFCNT_inc_NN (coro_sv);
887#define PRIO_HIGH 1 1974 prepare_schedule_to (aTHX_ &ta, next);
888#define PRIO_NORMAL 0 1975}
889#define PRIO_LOW -1
890#define PRIO_IDLE -3
891#define PRIO_MIN -4
892 1976
893/* for Coro.pm */
894static GV *coro_current, *coro_idle;
895static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896static int coro_nready;
897
898static void 1977static int
899coro_enq (SV *sv) 1978api_cede (pTHX)
900{ 1979{
901 int prio; 1980 struct coro_transfer_args ta;
902 1981
903 if (SvTYPE (sv) != SVt_PVHV) 1982 prepare_cede (aTHX_ &ta);
904 croak ("Coro::ready tried to enqueue something that is not a coroutine");
905 1983
906 prio = SvSTATE (sv)->prio; 1984 if (expect_true (ta.prev != ta.next))
1985 {
1986 TRANSFER (ta, 1);
1987 return 1;
1988 }
1989 else
1990 return 0;
1991}
907 1992
908 av_push (coro_ready [prio - PRIO_MIN], sv); 1993static int
1994api_cede_notself (pTHX)
1995{
909 coro_nready++; 1996 if (coro_nready)
910} 1997 {
1998 struct coro_transfer_args ta;
911 1999
912static SV * 2000 prepare_cede_notself (aTHX_ &ta);
913coro_deq (int min_prio) 2001 TRANSFER (ta, 1);
914{ 2002 return 1;
915 int prio = PRIO_MAX - PRIO_MIN; 2003 }
2004 else
2005 return 0;
2006}
916 2007
917 min_prio -= PRIO_MIN; 2008static void
918 if (min_prio < 0) 2009api_trace (pTHX_ SV *coro_sv, int flags)
919 min_prio = 0; 2010{
2011 struct coro *coro = SvSTATE (coro_sv);
920 2012
921 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2013 if (coro->flags & CF_RUNNING)
922 if (AvFILLp (coro_ready [prio]) >= 0) 2014 croak ("cannot enable tracing on a running coroutine, caught");
2015
2016 if (flags & CC_TRACE)
2017 {
2018 if (!coro->cctx)
2019 coro->cctx = cctx_new_run ();
2020 else if (!(coro->cctx->flags & CC_TRACE))
2021 croak ("cannot enable tracing on coroutine with custom stack, caught");
2022
2023 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2024 }
2025 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2026 {
2027 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2028
2029 if (coro->flags & CF_RUNNING)
2030 PL_runops = RUNOPS_DEFAULT;
2031 else
2032 coro->slot->runops = RUNOPS_DEFAULT;
2033 }
2034}
2035
2036static void
2037coro_push_av (pTHX_ AV *av, I32 gimme_v)
2038{
2039 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2040 {
2041 dSP;
2042
2043 if (gimme_v == G_SCALAR)
2044 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2045 else
923 { 2046 {
924 coro_nready--; 2047 int i;
925 return av_shift (coro_ready [prio]); 2048 EXTEND (SP, AvFILLp (av) + 1);
2049
2050 for (i = 0; i <= AvFILLp (av); ++i)
2051 PUSHs (AvARRAY (av)[i]);
926 } 2052 }
2053
2054 PUTBACK;
2055 }
2056}
2057
2058static void
2059coro_push_on_destroy (aTHX_ struct coro *coro, SV *cb)
2060{
2061 if (!coro->on_destroy)
2062 coro->on_destroy = newAV ();
2063
2064 av_push (coro->on_destroy, cb);
2065}
2066
2067static void
2068slf_destroy_join (pTHX_ struct CoroSLF *frame)
2069{
2070 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2071}
2072
2073static int
2074slf_check_join (pTHX_ struct CoroSLF *frame)
2075{
2076 struct coro *coro = (struct coro *)frame->data;
2077
2078 if (!coro->status)
2079 return 1;
2080
2081 frame->destroy = 0;
2082
2083 coro_push_av (coro->status, GIMME_V);
2084
2085 SvREFCNT_dec ((SV *)coro->hv);
927 2086
928 return 0; 2087 return 0;
929} 2088}
930 2089
931static void 2090static void
932api_ready (SV *coro) 2091slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
933{ 2092{
934 dTHX; 2093 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
935 2094
936 if (SvROK (coro)) 2095 if (items > 1)
937 coro = SvRV (coro); 2096 croak ("join called with too many arguments");
938 2097
939 LOCK; 2098 if (coro->status)
940 coro_enq (SvREFCNT_inc (coro)); 2099 frame->prepare = prepare_nop;
941 UNLOCK; 2100 else
942} 2101 {
943 2102 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
944static void 2103 frame->prepare = prepare_schedule;
945prepare_schedule (struct transfer_args *ta)
946{
947 SV *current, *prev, *next;
948
949 current = GvSV (coro_current);
950
951 for (;;)
952 { 2104 }
953 LOCK;
954 next = coro_deq (PRIO_MIN);
955 UNLOCK;
956 2105
957 if (next) 2106 frame->check = slf_check_join;
958 break; 2107 frame->destroy = slf_destroy_join;
2108 frame->data = (void *)coro;
2109 SvREFCNT_inc (coro->hv);
2110}
2111
2112static void
2113coro_call_on_destroy (pTHX_ struct coro *coro)
2114{
2115 AV *od = coro->on_destroy;
2116
2117 if (!od)
2118 return;
2119
2120 while (AvFILLp (od) >= 0)
2121 {
2122 SV *cb = sv_2mortal (av_pop (od));
2123
2124 /* coro hv's (and only hv's at the moment) are supported as well */
2125 if (SvSTATEhv_p (aTHX_ cb))
2126 api_ready (aTHX_ cb);
2127 else
2128 {
2129 dSP; /* don't disturb outer sp */
2130 PUSHMARK (SP);
2131
2132 if (coro->status)
2133 {
2134 PUTBACK;
2135 coro_push_av (aTHX_ coro->status, G_ARRAY);
2136 SPAGAIN;
2137 }
2138
2139 PUTBACK;
2140 call_sv (cb, G_VOID | G_DISCARD);
2141 }
2142 }
2143}
2144
2145static void
2146coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2147{
2148 AV *av;
2149
2150 if (coro->status)
2151 {
2152 av = coro->status;
2153 av_clear (av);
2154 }
2155 else
2156 av = coro->status = newAV ();
2157
2158 /* items are actually not so common, so optimise for this case */
2159 if (items)
2160 {
2161 int i;
2162
2163 av_extend (av, items - 1);
2164
2165 for (i = 0; i < items; ++i)
2166 av_push (av, SvREFCNT_inc_NN (arg [i]));
2167 }
2168}
2169
2170static void
2171slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2172{
2173 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2174 api_ready (aTHX_ sv_manager);
2175
2176 frame->prepare = prepare_schedule;
2177 frame->check = slf_check_repeat;
2178
2179 /* as a minor optimisation, we could unwind all stacks here */
2180 /* but that puts extra pressure on pp_slf, and is not worth much */
2181 /*coro_unwind_stacks (aTHX);*/
2182}
2183
2184static void
2185slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *coro_hv = (HV *)SvRV (coro_current);
2188
2189 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2190 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2191}
2192
2193static void
2194slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2195{
2196 HV *coro_hv;
2197 struct coro *coro;
2198
2199 if (items <= 0)
2200 croak ("Coro::cancel called without coro object,");
2201
2202 coro = SvSTATE (arg [0]);
2203 coro_hv = coro->hv;
2204
2205 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2206
2207 if (expect_false (coro->flags & CF_NOCANCEL))
2208 {
2209 /* coro currently busy cancelling something, so just notify it */
2210 coro->slf_frame.data = (void *)coro;
2211
2212 frame->prepare = prepare_nop;
2213 frame->check = slf_check_nop;
2214 }
2215 else if (coro_hv == (HV *)SvRV (coro_current))
2216 {
2217 /* cancelling the current coro is allowed, and equals terminate */
2218 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2219 }
2220 else
2221 {
2222 struct coro *self = SvSTATE_current;
2223
2224 /* otherwise we cancel directly, purely for speed reasons
2225 * unfortunately, this requires some magic trickery, as
2226 * somebody else could cancel us, so we have to fight the cancellation.
2227 * this is ugly, and hopefully fully worth the extra speed.
2228 * besides, I can't get the slow-but-safe version working...
2229 */
2230 slf_frame.data = 0;
2231 self->flags |= CF_NOCANCEL;
2232 coro_state_destroy (aTHX_ coro);
2233 self->flags &= ~CF_NOCANCEL;
2234
2235 if (slf_frame.data)
2236 {
2237 /* while we were busy we have been cancelled, so terminate */
2238 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2239 }
2240 else
2241 {
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 }
2246}
2247
2248static int
2249slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2250{
2251 frame->prepare = 0;
2252 coro_unwind_stacks (aTHX);
2253
2254 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2255
2256 return 1;
2257}
2258
2259static int
2260safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2261{
2262 if (coro->cctx)
2263 croak ("coro inside C callback, unable to cancel at this time, caught");
2264
2265 if (coro->flags & CF_NEW)
2266 {
2267 coro_set_status (aTHX_ coro, arg, items);
2268 coro_state_destroy (aTHX_ coro);
2269 }
2270 else
2271 {
2272 if (!coro->slf_frame.prepare)
2273 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2274
2275 slf_destroy (aTHX_ coro);
2276
2277 coro_set_status (aTHX_ coro, arg, items);
2278 coro->slf_frame.prepare = prepare_nop;
2279 coro->slf_frame.check = slf_check_safe_cancel;
2280
2281 api_ready (aTHX_ (SV *)coro->hv);
2282 }
2283
2284 return 1;
2285}
2286
2287/*****************************************************************************/
2288/* async pool handler */
2289
2290static int
2291slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2292{
2293 HV *hv = (HV *)SvRV (coro_current);
2294 struct coro *coro = (struct coro *)frame->data;
2295
2296 if (!coro->invoke_cb)
2297 return 1; /* loop till we have invoke */
2298 else
2299 {
2300 hv_store (hv, "desc", sizeof ("desc") - 1,
2301 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2302
2303 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
959 2304
960 { 2305 {
961 dSP; 2306 dSP;
962 2307 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
963 ENTER;
964 SAVETMPS;
965
966 PUSHMARK (SP);
967 PUTBACK; 2308 PUTBACK;
968 call_sv (GvSV (coro_idle), G_DISCARD);
969
970 FREETMPS;
971 LEAVE;
972 } 2309 }
2310
2311 SvREFCNT_dec (GvAV (PL_defgv));
2312 GvAV (PL_defgv) = coro->invoke_av;
2313 coro->invoke_av = 0;
2314
2315 return 0;
2316 }
2317}
2318
2319static void
2320slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2321{
2322 HV *hv = (HV *)SvRV (coro_current);
2323 struct coro *coro = SvSTATE_hv ((SV *)hv);
2324
2325 if (expect_true (coro->saved_deffh))
973 } 2326 {
2327 /* subsequent iteration */
2328 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2329 coro->saved_deffh = 0;
974 2330
975 prev = SvRV (current); 2331 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
976 SvRV (current) = next; 2332 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2333 {
2334 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2335 return;
2336 }
2337 else
2338 {
2339 av_clear (GvAV (PL_defgv));
2340 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
977 2341
978 /* free this only after the transfer */ 2342 coro->prio = 0;
979 LOCK;
980 free_coro_mortal ();
981 UNLOCK;
982 coro_mortal = prev;
983 2343
984 ta->prev = SvSTATE (prev); 2344 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
985 ta->next = SvSTATE (next); 2345 api_trace (aTHX_ coro_current, 0);
986 ta->flags = TRANSFER_SAVE_ALL;
987}
988 2346
2347 frame->prepare = prepare_schedule;
2348 av_push (av_async_pool, SvREFCNT_inc (hv));
2349 }
2350 }
2351 else
2352 {
2353 /* first iteration, simply fall through */
2354 frame->prepare = prepare_nop;
2355 }
2356
2357 frame->check = slf_check_pool_handler;
2358 frame->data = (void *)coro;
2359}
2360
2361/*****************************************************************************/
2362/* rouse callback */
2363
2364#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2365
2366static void
2367coro_rouse_callback (pTHX_ CV *cv)
2368{
2369 dXSARGS;
2370 SV *data = (SV *)S_GENSUB_ARG;
2371
2372 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2373 {
2374 /* first call, set args */
2375 SV *coro = SvRV (data);
2376 AV *av = newAV ();
2377
2378 SvRV_set (data, (SV *)av);
2379
2380 /* better take a full copy of the arguments */
2381 while (items--)
2382 av_store (av, items, newSVsv (ST (items)));
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 }
2387
2388 XSRETURN_EMPTY;
2389}
2390
989static void 2391static int
2392slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2393{
2394 SV *data = (SV *)frame->data;
2395
2396 if (CORO_THROW)
2397 return 0;
2398
2399 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2400 return 1;
2401
2402 /* now push all results on the stack */
2403 {
2404 dSP;
2405 AV *av = (AV *)SvRV (data);
2406 int i;
2407
2408 EXTEND (SP, AvFILLp (av) + 1);
2409 for (i = 0; i <= AvFILLp (av); ++i)
2410 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2411
2412 /* we have stolen the elements, so set length to zero and free */
2413 AvFILLp (av) = -1;
2414 av_undef (av);
2415
2416 PUTBACK;
2417 }
2418
2419 return 0;
2420}
2421
2422static void
2423slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 SV *cb;
2426
2427 if (items)
2428 cb = arg [0];
2429 else
2430 {
2431 struct coro *coro = SvSTATE_current;
2432
2433 if (!coro->rouse_cb)
2434 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2435
2436 cb = sv_2mortal (coro->rouse_cb);
2437 coro->rouse_cb = 0;
2438 }
2439
2440 if (!SvROK (cb)
2441 || SvTYPE (SvRV (cb)) != SVt_PVCV
2442 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2443 croak ("Coro::rouse_wait called with illegal callback argument,");
2444
2445 {
2446 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2447 SV *data = (SV *)S_GENSUB_ARG;
2448
2449 frame->data = (void *)data;
2450 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2451 frame->check = slf_check_rouse_wait;
2452 }
2453}
2454
2455static SV *
2456coro_new_rouse_cb (pTHX)
2457{
2458 HV *hv = (HV *)SvRV (coro_current);
2459 struct coro *coro = SvSTATE_hv (hv);
2460 SV *data = newRV_inc ((SV *)hv);
2461 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2462
2463 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2464 SvREFCNT_dec (data); /* magicext increases the refcount */
2465
2466 SvREFCNT_dec (coro->rouse_cb);
2467 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2468
2469 return cb;
2470}
2471
2472/*****************************************************************************/
2473/* schedule-like-function opcode (SLF) */
2474
2475static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2476static const CV *slf_cv;
2477static SV **slf_argv;
2478static int slf_argc, slf_arga; /* count, allocated */
2479static I32 slf_ax; /* top of stack, for restore */
2480
2481/* this restores the stack in the case we patched the entersub, to */
2482/* recreate the stack frame as perl will on following calls */
2483/* since entersub cleared the stack */
2484static OP *
2485pp_restore (pTHX)
2486{
2487 int i;
2488 SV **SP = PL_stack_base + slf_ax;
2489
2490 PUSHMARK (SP);
2491
2492 EXTEND (SP, slf_argc + 1);
2493
2494 for (i = 0; i < slf_argc; ++i)
2495 PUSHs (sv_2mortal (slf_argv [i]));
2496
2497 PUSHs ((SV *)CvGV (slf_cv));
2498
2499 RETURNOP (slf_restore.op_first);
2500}
2501
2502static void
2503slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2504{
2505 SV **arg = (SV **)slf_frame.data;
2506
2507 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2508}
2509
2510static void
2511slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2512{
2513 if (items != 2)
2514 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2515
2516 frame->prepare = slf_prepare_transfer;
2517 frame->check = slf_check_nop;
2518 frame->data = (void *)arg; /* let's hope it will stay valid */
2519}
2520
2521static void
2522slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2523{
2524 frame->prepare = prepare_schedule;
2525 frame->check = slf_check_nop;
2526}
2527
2528static void
990prepare_cede (struct transfer_args *ta) 2529slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
991{ 2530{
992 LOCK; 2531 struct coro *next = (struct coro *)slf_frame.data;
993 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994 UNLOCK;
995 2532
2533 SvREFCNT_inc_NN (next->hv);
996 prepare_schedule (ta); 2534 prepare_schedule_to (aTHX_ ta, next);
997} 2535}
998 2536
999static void 2537static void
1000api_schedule (void) 2538slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1001{ 2539{
1002 dTHX; 2540 if (!items)
2541 croak ("Coro::schedule_to expects a coroutine argument, caught");
2542
2543 frame->data = (void *)SvSTATE (arg [0]);
2544 frame->prepare = slf_prepare_schedule_to;
2545 frame->check = slf_check_nop;
2546}
2547
2548static void
2549slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2550{
2551 api_ready (aTHX_ SvRV (coro_current));
2552
2553 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2554}
2555
2556static void
2557slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2558{
2559 frame->prepare = prepare_cede;
2560 frame->check = slf_check_nop;
2561}
2562
2563static void
2564slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2565{
2566 frame->prepare = prepare_cede_notself;
2567 frame->check = slf_check_nop;
2568}
2569
2570/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2571static void
2572slf_destroy (pTHX_ struct coro *coro)
2573{
2574 /* this callback is reserved for slf functions needing to do cleanup */
2575 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2576 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2577
2578 /*
2579 * The on_destroy above most likely is from an SLF call.
2580 * Since by definition the SLF call will not finish when we destroy
2581 * the coro, we will have to force-finish it here, otherwise
2582 * cleanup functions cannot call SLF functions.
2583 */
2584 coro->slf_frame.prepare = 0;
2585}
2586
2587/*
2588 * these not obviously related functions are all rolled into one
2589 * function to increase chances that they all will call transfer with the same
2590 * stack offset
2591 * SLF stands for "schedule-like-function".
2592 */
2593static OP *
2594pp_slf (pTHX)
2595{
2596 I32 checkmark; /* mark SP to see how many elements check has pushed */
2597
2598 /* set up the slf frame, unless it has already been set-up */
2599 /* the latter happens when a new coro has been started */
2600 /* or when a new cctx was attached to an existing coroutine */
2601 if (expect_true (!slf_frame.prepare))
2602 {
2603 /* first iteration */
2604 dSP;
2605 SV **arg = PL_stack_base + TOPMARK + 1;
2606 int items = SP - arg; /* args without function object */
2607 SV *gv = *sp;
2608
2609 /* do a quick consistency check on the "function" object, and if it isn't */
2610 /* for us, divert to the real entersub */
2611 if (SvTYPE (gv) != SVt_PVGV
2612 || !GvCV (gv)
2613 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2614 return PL_ppaddr[OP_ENTERSUB](aTHX);
2615
2616 if (!(PL_op->op_flags & OPf_STACKED))
2617 {
2618 /* ampersand-form of call, use @_ instead of stack */
2619 AV *av = GvAV (PL_defgv);
2620 arg = AvARRAY (av);
2621 items = AvFILLp (av) + 1;
2622 }
2623
2624 /* now call the init function, which needs to set up slf_frame */
2625 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2626 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2627
2628 /* pop args */
2629 SP = PL_stack_base + POPMARK;
2630
2631 PUTBACK;
2632 }
2633
2634 /* now that we have a slf_frame, interpret it! */
2635 /* we use a callback system not to make the code needlessly */
2636 /* complicated, but so we can run multiple perl coros from one cctx */
2637
2638 do
2639 {
1003 struct transfer_args ta; 2640 struct coro_transfer_args ta;
1004 2641
1005 prepare_schedule (&ta); 2642 slf_frame.prepare (aTHX_ &ta);
1006 TRANSFER (ta); 2643 TRANSFER (ta, 0);
1007}
1008 2644
2645 checkmark = PL_stack_sp - PL_stack_base;
2646 }
2647 while (slf_frame.check (aTHX_ &slf_frame));
2648
2649 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2650
2651 /* exception handling */
2652 if (expect_false (CORO_THROW))
2653 {
2654 SV *exception = sv_2mortal (CORO_THROW);
2655
2656 CORO_THROW = 0;
2657 sv_setsv (ERRSV, exception);
2658 croak (0);
2659 }
2660
2661 /* return value handling - mostly like entersub */
2662 /* make sure we put something on the stack in scalar context */
2663 if (GIMME_V == G_SCALAR
2664 && expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2665 {
2666 dSP;
2667 SV **bot = PL_stack_base + checkmark;
2668
2669 if (sp == bot) /* too few, push undef */
2670 bot [1] = &PL_sv_undef;
2671 else /* too many, take last one */
2672 bot [1] = *sp;
2673
2674 SP = bot + 1;
2675
2676 PUTBACK;
2677 }
2678
2679 return NORMAL;
2680}
2681
2682static void
2683api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2684{
2685 int i;
2686 SV **arg = PL_stack_base + ax;
2687 int items = PL_stack_sp - arg + 1;
2688
2689 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2690
2691 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2692 && PL_op->op_ppaddr != pp_slf)
2693 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2694
2695 CvFLAGS (cv) |= CVf_SLF;
2696 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2697 slf_cv = cv;
2698
2699 /* we patch the op, and then re-run the whole call */
2700 /* we have to put the same argument on the stack for this to work */
2701 /* and this will be done by pp_restore */
2702 slf_restore.op_next = (OP *)&slf_restore;
2703 slf_restore.op_type = OP_CUSTOM;
2704 slf_restore.op_ppaddr = pp_restore;
2705 slf_restore.op_first = PL_op;
2706
2707 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2708
2709 if (PL_op->op_flags & OPf_STACKED)
2710 {
2711 if (items > slf_arga)
2712 {
2713 slf_arga = items;
2714 Safefree (slf_argv);
2715 New (0, slf_argv, slf_arga, SV *);
2716 }
2717
2718 slf_argc = items;
2719
2720 for (i = 0; i < items; ++i)
2721 slf_argv [i] = SvREFCNT_inc (arg [i]);
2722 }
2723 else
2724 slf_argc = 0;
2725
2726 PL_op->op_ppaddr = pp_slf;
2727 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2728
2729 PL_op = (OP *)&slf_restore;
2730}
2731
2732/*****************************************************************************/
2733/* dynamic wind */
2734
2735static void
2736on_enterleave_call (pTHX_ SV *cb)
2737{
2738 dSP;
2739
2740 PUSHSTACK;
2741
2742 PUSHMARK (SP);
2743 PUTBACK;
2744 call_sv (cb, G_VOID | G_DISCARD);
2745 SPAGAIN;
2746
2747 POPSTACK;
2748}
2749
2750static SV *
2751coro_avp_pop_and_free (pTHX_ AV **avp)
2752{
2753 AV *av = *avp;
2754 SV *res = av_pop (av);
2755
2756 if (AvFILLp (av) < 0)
2757 {
2758 *avp = 0;
2759 SvREFCNT_dec (av);
2760 }
2761
2762 return res;
2763}
2764
2765static void
2766coro_pop_on_enter (pTHX_ void *coro)
2767{
2768 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2769 SvREFCNT_dec (cb);
2770}
2771
2772static void
2773coro_pop_on_leave (pTHX_ void *coro)
2774{
2775 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2776 on_enterleave_call (aTHX_ sv_2mortal (cb));
2777}
2778
2779/*****************************************************************************/
2780/* PerlIO::cede */
2781
2782typedef struct
2783{
2784 PerlIOBuf base;
2785 NV next, every;
2786} PerlIOCede;
2787
2788static IV
2789PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2790{
2791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2792
2793 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2794 self->next = nvtime () + self->every;
2795
2796 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2797}
2798
2799static SV *
2800PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2801{
2802 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2803
2804 return newSVnv (self->every);
2805}
2806
2807static IV
2808PerlIOCede_flush (pTHX_ PerlIO *f)
2809{
2810 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2811 double now = nvtime ();
2812
2813 if (now >= self->next)
2814 {
2815 api_cede (aTHX);
2816 self->next = now + self->every;
2817 }
2818
2819 return PerlIOBuf_flush (aTHX_ f);
2820}
2821
2822static PerlIO_funcs PerlIO_cede =
2823{
2824 sizeof(PerlIO_funcs),
2825 "cede",
2826 sizeof(PerlIOCede),
2827 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2828 PerlIOCede_pushed,
2829 PerlIOBuf_popped,
2830 PerlIOBuf_open,
2831 PerlIOBase_binmode,
2832 PerlIOCede_getarg,
2833 PerlIOBase_fileno,
2834 PerlIOBuf_dup,
2835 PerlIOBuf_read,
2836 PerlIOBuf_unread,
2837 PerlIOBuf_write,
2838 PerlIOBuf_seek,
2839 PerlIOBuf_tell,
2840 PerlIOBuf_close,
2841 PerlIOCede_flush,
2842 PerlIOBuf_fill,
2843 PerlIOBase_eof,
2844 PerlIOBase_error,
2845 PerlIOBase_clearerr,
2846 PerlIOBase_setlinebuf,
2847 PerlIOBuf_get_base,
2848 PerlIOBuf_bufsiz,
2849 PerlIOBuf_get_ptr,
2850 PerlIOBuf_get_cnt,
2851 PerlIOBuf_set_ptrcnt,
2852};
2853
2854/*****************************************************************************/
2855/* Coro::Semaphore & Coro::Signal */
2856
2857static SV *
2858coro_waitarray_new (pTHX_ int count)
2859{
2860 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2861 AV *av = newAV ();
2862 SV **ary;
2863
2864 /* unfortunately, building manually saves memory */
2865 Newx (ary, 2, SV *);
2866 AvALLOC (av) = ary;
2867#if PERL_VERSION_ATLEAST (5,10,0)
2868 AvARRAY (av) = ary;
2869#else
2870 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2871 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2872 SvPVX ((SV *)av) = (char *)ary;
2873#endif
2874 AvMAX (av) = 1;
2875 AvFILLp (av) = 0;
2876 ary [0] = newSViv (count);
2877
2878 return newRV_noinc ((SV *)av);
2879}
2880
2881/* semaphore */
2882
2883static void
2884coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2885{
2886 SV *count_sv = AvARRAY (av)[0];
2887 IV count = SvIVX (count_sv);
2888
2889 count += adjust;
2890 SvIVX (count_sv) = count;
2891
2892 /* now wake up as many waiters as are expected to lock */
2893 while (count > 0 && AvFILLp (av) > 0)
2894 {
2895 SV *cb;
2896
2897 /* swap first two elements so we can shift a waiter */
2898 AvARRAY (av)[0] = AvARRAY (av)[1];
2899 AvARRAY (av)[1] = count_sv;
2900 cb = av_shift (av);
2901
2902 if (SvOBJECT (cb))
2903 {
2904 api_ready (aTHX_ cb);
2905 --count;
2906 }
2907 else if (SvTYPE (cb) == SVt_PVCV)
2908 {
2909 dSP;
2910 PUSHMARK (SP);
2911 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2912 PUTBACK;
2913 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2914 }
2915
2916 SvREFCNT_dec (cb);
2917 }
2918}
2919
2920static void
2921coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2922{
2923 /* call $sem->adjust (0) to possibly wake up some other waiters */
2924 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2925}
2926
1009static void 2927static int
1010api_cede (void) 2928slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1011{ 2929{
1012 dTHX; 2930 AV *av = (AV *)frame->data;
1013 struct transfer_args ta; 2931 SV *count_sv = AvARRAY (av)[0];
2932 SV *coro_hv = SvRV (coro_current);
1014 2933
1015 prepare_cede (&ta); 2934 /* if we are about to throw, don't actually acquire the lock, just throw */
1016 TRANSFER (ta); 2935 if (CORO_THROW)
1017} 2936 return 0;
2937 else if (SvIVX (count_sv) > 0)
2938 {
2939 frame->destroy = 0;
1018 2940
2941 if (acquire)
2942 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2943 else
2944 coro_semaphore_adjust (aTHX_ av, 0);
2945
2946 return 0;
2947 }
2948 else
2949 {
2950 int i;
2951 /* if we were woken up but can't down, we look through the whole */
2952 /* waiters list and only add us if we aren't in there already */
2953 /* this avoids some degenerate memory usage cases */
2954 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2955 if (AvARRAY (av)[i] == coro_hv)
2956 return 1;
2957
2958 av_push (av, SvREFCNT_inc (coro_hv));
2959 return 1;
2960 }
2961}
2962
2963static int
2964slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2965{
2966 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2967}
2968
2969static int
2970slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2971{
2972 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2973}
2974
2975static void
2976slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2977{
2978 AV *av = (AV *)SvRV (arg [0]);
2979
2980 if (SvIVX (AvARRAY (av)[0]) > 0)
2981 {
2982 frame->data = (void *)av;
2983 frame->prepare = prepare_nop;
2984 }
2985 else
2986 {
2987 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2988
2989 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2990 frame->prepare = prepare_schedule;
2991 /* to avoid race conditions when a woken-up coro gets terminated */
2992 /* we arrange for a temporary on_destroy that calls adjust (0) */
2993 frame->destroy = coro_semaphore_destroy;
2994 }
2995}
2996
2997static void
2998slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2999{
3000 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3001 frame->check = slf_check_semaphore_down;
3002}
3003
3004static void
3005slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3006{
3007 if (items >= 2)
3008 {
3009 /* callback form */
3010 AV *av = (AV *)SvRV (arg [0]);
3011 SV *cb_cv = s_get_cv_croak (arg [1]);
3012
3013 av_push (av, SvREFCNT_inc_NN (cb_cv));
3014
3015 if (SvIVX (AvARRAY (av)[0]) > 0)
3016 coro_semaphore_adjust (aTHX_ av, 0);
3017
3018 frame->prepare = prepare_nop;
3019 frame->check = slf_check_nop;
3020 }
3021 else
3022 {
3023 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3024 frame->check = slf_check_semaphore_wait;
3025 }
3026}
3027
3028/* signal */
3029
3030static void
3031coro_signal_wake (pTHX_ AV *av, int count)
3032{
3033 SvIVX (AvARRAY (av)[0]) = 0;
3034
3035 /* now signal count waiters */
3036 while (count > 0 && AvFILLp (av) > 0)
3037 {
3038 SV *cb;
3039
3040 /* swap first two elements so we can shift a waiter */
3041 cb = AvARRAY (av)[0];
3042 AvARRAY (av)[0] = AvARRAY (av)[1];
3043 AvARRAY (av)[1] = cb;
3044
3045 cb = av_shift (av);
3046
3047 if (SvTYPE (cb) == SVt_PVCV)
3048 {
3049 dSP;
3050 PUSHMARK (SP);
3051 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3052 PUTBACK;
3053 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3054 }
3055 else
3056 {
3057 api_ready (aTHX_ cb);
3058 sv_setiv (cb, 0); /* signal waiter */
3059 }
3060
3061 SvREFCNT_dec (cb);
3062
3063 --count;
3064 }
3065}
3066
3067static int
3068slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3069{
3070 /* if we are about to throw, also stop waiting */
3071 return SvROK ((SV *)frame->data) && !CORO_THROW;
3072}
3073
3074static void
3075slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3076{
3077 AV *av = (AV *)SvRV (arg [0]);
3078
3079 if (items >= 2)
3080 {
3081 SV *cb_cv = s_get_cv_croak (arg [1]);
3082 av_push (av, SvREFCNT_inc_NN (cb_cv));
3083
3084 if (SvIVX (AvARRAY (av)[0]))
3085 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3086
3087 frame->prepare = prepare_nop;
3088 frame->check = slf_check_nop;
3089 }
3090 else if (SvIVX (AvARRAY (av)[0]))
3091 {
3092 SvIVX (AvARRAY (av)[0]) = 0;
3093 frame->prepare = prepare_nop;
3094 frame->check = slf_check_nop;
3095 }
3096 else
3097 {
3098 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3099
3100 av_push (av, waiter);
3101
3102 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3103 frame->prepare = prepare_schedule;
3104 frame->check = slf_check_signal_wait;
3105 }
3106}
3107
3108/*****************************************************************************/
3109/* Coro::AIO */
3110
3111#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3112
3113/* helper storage struct */
3114struct io_state
3115{
3116 int errorno;
3117 I32 laststype; /* U16 in 5.10.0 */
3118 int laststatval;
3119 Stat_t statcache;
3120};
3121
3122static void
3123coro_aio_callback (pTHX_ CV *cv)
3124{
3125 dXSARGS;
3126 AV *state = (AV *)S_GENSUB_ARG;
3127 SV *coro = av_pop (state);
3128 SV *data_sv = newSV (sizeof (struct io_state));
3129
3130 av_extend (state, items - 1);
3131
3132 sv_upgrade (data_sv, SVt_PV);
3133 SvCUR_set (data_sv, sizeof (struct io_state));
3134 SvPOK_only (data_sv);
3135
3136 {
3137 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3138
3139 data->errorno = errno;
3140 data->laststype = PL_laststype;
3141 data->laststatval = PL_laststatval;
3142 data->statcache = PL_statcache;
3143 }
3144
3145 /* now build the result vector out of all the parameters and the data_sv */
3146 {
3147 int i;
3148
3149 for (i = 0; i < items; ++i)
3150 av_push (state, SvREFCNT_inc_NN (ST (i)));
3151 }
3152
3153 av_push (state, data_sv);
3154
3155 api_ready (aTHX_ coro);
3156 SvREFCNT_dec (coro);
3157 SvREFCNT_dec ((AV *)state);
3158}
3159
3160static int
3161slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3162{
3163 AV *state = (AV *)frame->data;
3164
3165 /* if we are about to throw, return early */
3166 /* this does not cancel the aio request, but at least */
3167 /* it quickly returns */
3168 if (CORO_THROW)
3169 return 0;
3170
3171 /* one element that is an RV? repeat! */
3172 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3173 return 1;
3174
3175 /* restore status */
3176 {
3177 SV *data_sv = av_pop (state);
3178 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3179
3180 errno = data->errorno;
3181 PL_laststype = data->laststype;
3182 PL_laststatval = data->laststatval;
3183 PL_statcache = data->statcache;
3184
3185 SvREFCNT_dec (data_sv);
3186 }
3187
3188 /* push result values */
3189 {
3190 dSP;
3191 int i;
3192
3193 EXTEND (SP, AvFILLp (state) + 1);
3194 for (i = 0; i <= AvFILLp (state); ++i)
3195 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3196
3197 PUTBACK;
3198 }
3199
3200 return 0;
3201}
3202
3203static void
3204slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3205{
3206 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3207 SV *coro_hv = SvRV (coro_current);
3208 struct coro *coro = SvSTATE_hv (coro_hv);
3209
3210 /* put our coroutine id on the state arg */
3211 av_push (state, SvREFCNT_inc_NN (coro_hv));
3212
3213 /* first see whether we have a non-zero priority and set it as AIO prio */
3214 if (coro->prio)
3215 {
3216 dSP;
3217
3218 static SV *prio_cv;
3219 static SV *prio_sv;
3220
3221 if (expect_false (!prio_cv))
3222 {
3223 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3224 prio_sv = newSViv (0);
3225 }
3226
3227 PUSHMARK (SP);
3228 sv_setiv (prio_sv, coro->prio);
3229 XPUSHs (prio_sv);
3230
3231 PUTBACK;
3232 call_sv (prio_cv, G_VOID | G_DISCARD);
3233 }
3234
3235 /* now call the original request */
3236 {
3237 dSP;
3238 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3239 int i;
3240
3241 PUSHMARK (SP);
3242
3243 /* first push all args to the stack */
3244 EXTEND (SP, items + 1);
3245
3246 for (i = 0; i < items; ++i)
3247 PUSHs (arg [i]);
3248
3249 /* now push the callback closure */
3250 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3251
3252 /* now call the AIO function - we assume our request is uncancelable */
3253 PUTBACK;
3254 call_sv ((SV *)req, G_VOID | G_DISCARD);
3255 }
3256
3257 /* now that the request is going, we loop till we have a result */
3258 frame->data = (void *)state;
3259 frame->prepare = prepare_schedule;
3260 frame->check = slf_check_aio_req;
3261}
3262
3263static void
3264coro_aio_req_xs (pTHX_ CV *cv)
3265{
3266 dXSARGS;
3267
3268 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3269
3270 XSRETURN_EMPTY;
3271}
3272
3273/*****************************************************************************/
3274
3275#if CORO_CLONE
3276# include "clone.c"
3277#endif
3278
3279/*****************************************************************************/
3280
3281static SV *
3282coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3283{
3284 SV *coro_sv;
3285 struct coro *coro;
3286 MAGIC *mg;
3287 HV *hv;
3288 SV *cb;
3289 int i;
3290
3291 if (argc > 0)
3292 {
3293 cb = s_get_cv_croak (argv [0]);
3294
3295 if (!is_coro)
3296 {
3297 if (CvISXSUB (cb))
3298 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3299
3300 if (!CvROOT (cb))
3301 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3302 }
3303 }
3304
3305 Newz (0, coro, 1, struct coro);
3306 coro->args = newAV ();
3307 coro->flags = CF_NEW;
3308
3309 if (coro_first) coro_first->prev = coro;
3310 coro->next = coro_first;
3311 coro_first = coro;
3312
3313 coro->hv = hv = newHV ();
3314 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3315 mg->mg_flags |= MGf_DUP;
3316 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3317
3318 if (argc > 0)
3319 {
3320 av_extend (coro->args, argc + is_coro - 1);
3321
3322 if (is_coro)
3323 {
3324 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3325 cb = (SV *)cv_coro_run;
3326 }
3327
3328 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3329
3330 for (i = 1; i < argc; i++)
3331 av_push (coro->args, newSVsv (argv [i]));
3332 }
3333
3334 return coro_sv;
3335}
3336
1019MODULE = Coro::State PACKAGE = Coro::State 3337MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020 3338
1021PROTOTYPES: DISABLE 3339PROTOTYPES: DISABLE
1022 3340
1023BOOT: 3341BOOT:
1024{ 3342{
1025#ifdef USE_ITHREADS 3343#ifdef USE_ITHREADS
1026 MUTEX_INIT (&coro_mutex); 3344# if CORO_PTHREAD
3345 coro_thx = PERL_GET_CONTEXT;
3346# endif
1027#endif 3347#endif
1028 BOOT_PAGESIZE; 3348 BOOT_PAGESIZE;
1029 3349
3350 cctx_current = cctx_new_empty ();
3351
3352 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3353 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3354
3355 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3356 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3357 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3358
3359 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3360 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3361 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3362
1030 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3363 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031 3364
1032 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3365 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3366 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3367 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3368 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1035 3369
1036 main_mainstack = PL_mainstack; 3370 main_mainstack = PL_mainstack;
3371 main_top_env = PL_top_env;
1037 3372
3373 while (main_top_env->je_prev)
3374 main_top_env = main_top_env->je_prev;
3375
3376 {
3377 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3378
3379 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3380 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3381
3382 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3383 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3384 }
3385
1038 coroapi.ver = CORO_API_VERSION; 3386 coroapi.ver = CORO_API_VERSION;
3387 coroapi.rev = CORO_API_REVISION;
3388
1039 coroapi.transfer = api_transfer; 3389 coroapi.transfer = api_transfer;
1040 3390
3391 coroapi.sv_state = SvSTATE_;
3392 coroapi.execute_slf = api_execute_slf;
3393 coroapi.prepare_nop = prepare_nop;
3394 coroapi.prepare_schedule = prepare_schedule;
3395 coroapi.prepare_cede = prepare_cede;
3396 coroapi.prepare_cede_notself = prepare_cede_notself;
3397
3398 time_init (aTHX);
3399
1041 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3400 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1042} 3401}
1043 3402
1044SV * 3403SV *
1045new (char *klass, ...) 3404new (SV *klass, ...)
3405 ALIAS:
3406 Coro::new = 1
1046 CODE: 3407 CODE:
1047{ 3408 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1048 struct coro *coro; 3409 OUTPUT:
1049 HV *hv;
1050 int i;
1051
1052 Newz (0, coro, 1, struct coro);
1053 coro->args = newAV ();
1054
1055 hv = newHV ();
1056 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1057 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058
1059 for (i = 1; i < items; i++)
1060 av_push (coro->args, newSVsv (ST (i)));
1061
1062 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1063 /*coro->stack = 0;*/
1064}
1065 OUTPUT:
1066 RETVAL 3410 RETVAL
1067 3411
1068void 3412void
1069_set_stacklevel (...) 3413transfer (...)
1070 ALIAS: 3414 PROTOTYPE: $$
1071 Coro::State::transfer = 1 3415 CODE:
1072 Coro::schedule = 2 3416 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1073 Coro::cede = 3
1074 Coro::Cont::yield = 4
1075 CODE:
1076{
1077 struct transfer_args ta;
1078
1079 switch (ix)
1080 {
1081 case 0:
1082 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1083 ta.next = 0;
1084 ta.flags = TRANSFER_SET_STACKLEVEL;
1085 break;
1086
1087 case 1:
1088 if (items != 3)
1089 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1090
1091 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1092 break;
1093
1094 case 2:
1095 prepare_schedule (&ta);
1096 break;
1097
1098 case 3:
1099 prepare_cede (&ta);
1100 break;
1101
1102 case 4:
1103 {
1104 SV *yieldstack;
1105 SV *sv;
1106 AV *defav = GvAV (PL_defgv);
1107
1108 yieldstack = *hv_fetch (
1109 (HV *)SvRV (GvSV (coro_current)),
1110 "yieldstack", sizeof ("yieldstack") - 1,
1111 0
1112 );
1113
1114 /* set up @_ -- ugly */
1115 av_clear (defav);
1116 av_fill (defav, items - 1);
1117 while (items--)
1118 av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120 sv = av_pop ((AV *)SvRV (yieldstack));
1121 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123 ta.flags = 0;
1124 SvREFCNT_dec (sv);
1125 }
1126 break;
1127
1128 }
1129
1130 TRANSFER (ta);
1131}
1132 3417
1133void 3418void
1134_clone_state_from (SV *dst, SV *src)
1135 CODE:
1136{
1137 struct coro *coro_src = SvSTATE (src);
1138
1139 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141 ++coro_src->refcnt;
1142 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143}
1144
1145void
1146_exit (code) 3419_exit (int code)
1147 int code
1148 PROTOTYPE: $ 3420 PROTOTYPE: $
1149 CODE: 3421 CODE:
1150 _exit (code); 3422 _exit (code);
1151 3423
3424SV *
3425clone (Coro::State coro)
3426 CODE:
3427{
3428#if CORO_CLONE
3429 struct coro *ncoro = coro_clone (aTHX_ coro);
3430 MAGIC *mg;
3431 /* TODO: too much duplication */
3432 ncoro->hv = newHV ();
3433 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3434 mg->mg_flags |= MGf_DUP;
3435 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3436#else
3437 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3438#endif
3439}
3440 OUTPUT:
3441 RETVAL
3442
3443int
3444cctx_stacksize (int new_stacksize = 0)
3445 PROTOTYPE: ;$
3446 CODE:
3447 RETVAL = cctx_stacksize;
3448 if (new_stacksize)
3449 {
3450 cctx_stacksize = new_stacksize;
3451 ++cctx_gen;
3452 }
3453 OUTPUT:
3454 RETVAL
3455
3456int
3457cctx_max_idle (int max_idle = 0)
3458 PROTOTYPE: ;$
3459 CODE:
3460 RETVAL = cctx_max_idle;
3461 if (max_idle > 1)
3462 cctx_max_idle = max_idle;
3463 OUTPUT:
3464 RETVAL
3465
3466int
3467cctx_count ()
3468 PROTOTYPE:
3469 CODE:
3470 RETVAL = cctx_count;
3471 OUTPUT:
3472 RETVAL
3473
3474int
3475cctx_idle ()
3476 PROTOTYPE:
3477 CODE:
3478 RETVAL = cctx_idle;
3479 OUTPUT:
3480 RETVAL
3481
3482void
3483list ()
3484 PROTOTYPE:
3485 PPCODE:
3486{
3487 struct coro *coro;
3488 for (coro = coro_first; coro; coro = coro->next)
3489 if (coro->hv)
3490 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3491}
3492
3493void
3494call (Coro::State coro, SV *coderef)
3495 ALIAS:
3496 eval = 1
3497 CODE:
3498{
3499 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3500 {
3501 struct coro *current = SvSTATE_current;
3502 struct CoroSLF slf_save;
3503
3504 if (current != coro)
3505 {
3506 PUTBACK;
3507 save_perl (aTHX_ current);
3508 load_perl (aTHX_ coro);
3509 /* the coro is most likely in an active SLF call.
3510 * while not strictly required (the code we execute is
3511 * not allowed to call any SLF functions), it's cleaner
3512 * to reinitialise the slf_frame and restore it later.
3513 * This might one day allow us to actually do SLF calls
3514 * from code executed here.
3515 */
3516 slf_save = slf_frame;
3517 slf_frame.prepare = 0;
3518 SPAGAIN;
3519 }
3520
3521 PUSHSTACK;
3522
3523 PUSHMARK (SP);
3524 PUTBACK;
3525
3526 if (ix)
3527 eval_sv (coderef, 0);
3528 else
3529 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3530
3531 POPSTACK;
3532 SPAGAIN;
3533
3534 if (current != coro)
3535 {
3536 PUTBACK;
3537 slf_frame = slf_save;
3538 save_perl (aTHX_ coro);
3539 load_perl (aTHX_ current);
3540 SPAGAIN;
3541 }
3542 }
3543}
3544
3545SV *
3546is_ready (Coro::State coro)
3547 PROTOTYPE: $
3548 ALIAS:
3549 is_ready = CF_READY
3550 is_running = CF_RUNNING
3551 is_new = CF_NEW
3552 is_destroyed = CF_ZOMBIE
3553 is_zombie = CF_ZOMBIE
3554 is_suspended = CF_SUSPENDED
3555 CODE:
3556 RETVAL = boolSV (coro->flags & ix);
3557 OUTPUT:
3558 RETVAL
3559
3560void
3561throw (Coro::State self, SV *exception = &PL_sv_undef)
3562 PROTOTYPE: $;$
3563 CODE:
3564{
3565 struct coro *current = SvSTATE_current;
3566 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3567 SvREFCNT_dec (*exceptionp);
3568 SvGETMAGIC (exception);
3569 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3570}
3571
3572void
3573api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3574 PROTOTYPE: $;$
3575 C_ARGS: aTHX_ coro, flags
3576
3577SV *
3578has_cctx (Coro::State coro)
3579 PROTOTYPE: $
3580 CODE:
3581 /* maybe manage the running flag differently */
3582 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3583 OUTPUT:
3584 RETVAL
3585
3586int
3587is_traced (Coro::State coro)
3588 PROTOTYPE: $
3589 CODE:
3590 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3591 OUTPUT:
3592 RETVAL
3593
3594UV
3595rss (Coro::State coro)
3596 PROTOTYPE: $
3597 ALIAS:
3598 usecount = 1
3599 CODE:
3600 switch (ix)
3601 {
3602 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3603 case 1: RETVAL = coro->usecount; break;
3604 }
3605 OUTPUT:
3606 RETVAL
3607
3608void
3609force_cctx ()
3610 PROTOTYPE:
3611 CODE:
3612 cctx_current->idle_sp = 0;
3613
3614void
3615swap_defsv (Coro::State self)
3616 PROTOTYPE: $
3617 ALIAS:
3618 swap_defav = 1
3619 CODE:
3620 if (!self->slot)
3621 croak ("cannot swap state with coroutine that has no saved state,");
3622 else
3623 {
3624 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3625 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3626
3627 SV *tmp = *src; *src = *dst; *dst = tmp;
3628 }
3629
3630void
3631cancel (Coro::State self)
3632 CODE:
3633 coro_state_destroy (aTHX_ self);
3634
3635SV *
3636enable_times (int enabled = enable_times)
3637 CODE:
3638{
3639 RETVAL = boolSV (enable_times);
3640
3641 if (enabled != enable_times)
3642 {
3643 enable_times = enabled;
3644
3645 coro_times_update ();
3646 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3647 }
3648}
3649 OUTPUT:
3650 RETVAL
3651
3652void
3653times (Coro::State self)
3654 PPCODE:
3655{
3656 struct coro *current = SvSTATE (coro_current);
3657
3658 if (expect_false (current == self))
3659 {
3660 coro_times_update ();
3661 coro_times_add (SvSTATE (coro_current));
3662 }
3663
3664 EXTEND (SP, 2);
3665 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3666 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3667
3668 if (expect_false (current == self))
3669 coro_times_sub (SvSTATE (coro_current));
3670}
3671
3672void
3673swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3674 CODE:
3675{
3676 struct coro *current = SvSTATE_current;
3677
3678 if (current == coro)
3679 SWAP_SVS (current);
3680
3681 if (!coro->swap_sv)
3682 coro->swap_sv = newAV ();
3683
3684 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3685 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3686
3687 if (current == coro)
3688 SWAP_SVS (current);
3689}
3690
3691
1152MODULE = Coro::State PACKAGE = Coro 3692MODULE = Coro::State PACKAGE = Coro
1153 3693
1154BOOT: 3694BOOT:
1155{ 3695{
1156 int i; 3696 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3697 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3698 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3699 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3700 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3701 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3702 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3703 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1157 3704
3705 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3706 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3707 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3708 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3709
1158 coro_stash = gv_stashpv ("Coro", TRUE); 3710 coro_stash = gv_stashpv ("Coro", TRUE);
1159 3711
1160 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3712 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1161 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3713 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1162 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3714 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1163 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3715 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1164 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3716 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1165 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3717 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1166
1167 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1168 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1169
1170 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171 coro_ready[i] = newAV ();
1172 3718
1173 { 3719 {
1174 SV *sv = perl_get_sv("Coro::API", 1); 3720 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1175 3721
1176 coroapi.schedule = api_schedule; 3722 coroapi.schedule = api_schedule;
3723 coroapi.schedule_to = api_schedule_to;
1177 coroapi.cede = api_cede; 3724 coroapi.cede = api_cede;
3725 coroapi.cede_notself = api_cede_notself;
1178 coroapi.ready = api_ready; 3726 coroapi.ready = api_ready;
3727 coroapi.is_ready = api_is_ready;
1179 coroapi.nready = &coro_nready; 3728 coroapi.nready = coro_nready;
1180 coroapi.current = coro_current; 3729 coroapi.current = coro_current;
1181 3730
1182 GCoroAPI = &coroapi; 3731 /*GCoroAPI = &coroapi;*/
1183 sv_setiv (sv, (IV)&coroapi); 3732 sv_setiv (sv, (IV)&coroapi);
1184 SvREADONLY_on (sv); 3733 SvREADONLY_on (sv);
1185 } 3734 }
1186} 3735}
1187 3736
3737SV *
3738async (...)
3739 PROTOTYPE: &@
3740 CODE:
3741 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3742 api_ready (aTHX_ RETVAL);
3743 OUTPUT:
3744 RETVAL
3745
3746void
3747_destroy (Coro::State coro)
3748 CODE:
3749 /* used by the manager thread */
3750 coro_state_destroy (aTHX_ coro);
3751
3752void
3753on_destroy (Coro::State coro, SV *cb)
3754 CODE:
3755 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3756
3757void
3758join (...)
3759 CODE:
3760 CORO_EXECUTE_SLF_XS (slf_init_join);
3761
3762void
3763terminate (...)
3764 CODE:
3765 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3766
3767void
3768cancel (...)
3769 CODE:
3770 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3771
3772int
3773safe_cancel (Coro::State self, ...)
3774 C_ARGS: aTHX_ self, &ST (1), items - 1
3775
3776void
3777schedule (...)
3778 CODE:
3779 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3780
3781void
3782schedule_to (...)
3783 CODE:
3784 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3785
3786void
3787cede_to (...)
3788 CODE:
3789 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3790
3791void
3792cede (...)
3793 CODE:
3794 CORO_EXECUTE_SLF_XS (slf_init_cede);
3795
3796void
3797cede_notself (...)
3798 CODE:
3799 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3800
3801void
3802_set_current (SV *current)
3803 PROTOTYPE: $
3804 CODE:
3805 SvREFCNT_dec (SvRV (coro_current));
3806 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3807
3808void
3809_set_readyhook (SV *hook)
3810 PROTOTYPE: $
3811 CODE:
3812 SvREFCNT_dec (coro_readyhook);
3813 SvGETMAGIC (hook);
3814 if (SvOK (hook))
3815 {
3816 coro_readyhook = newSVsv (hook);
3817 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3818 }
3819 else
3820 {
3821 coro_readyhook = 0;
3822 CORO_READYHOOK = 0;
3823 }
3824
1188int 3825int
1189prio (Coro::State coro, int newprio = 0) 3826prio (Coro::State coro, int newprio = 0)
3827 PROTOTYPE: $;$
1190 ALIAS: 3828 ALIAS:
1191 nice = 1 3829 nice = 1
1192 CODE: 3830 CODE:
1193{ 3831{
1194 RETVAL = coro->prio; 3832 RETVAL = coro->prio;
1195 3833
1196 if (items > 1) 3834 if (items > 1)
1197 { 3835 {
1198 if (ix) 3836 if (ix)
1199 newprio += coro->prio; 3837 newprio = coro->prio - newprio;
1200 3838
1201 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3839 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1202 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3840 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1203 3841
1204 coro->prio = newprio; 3842 coro->prio = newprio;
1205 } 3843 }
1206} 3844}
3845 OUTPUT:
3846 RETVAL
1207 3847
1208void 3848SV *
1209ready (SV *self) 3849ready (SV *self)
1210 PROTOTYPE: $ 3850 PROTOTYPE: $
1211 CODE: 3851 CODE:
1212 api_ready (self); 3852 RETVAL = boolSV (api_ready (aTHX_ self));
3853 OUTPUT:
3854 RETVAL
1213 3855
1214int 3856int
1215nready (...) 3857nready (...)
1216 PROTOTYPE: 3858 PROTOTYPE:
1217 CODE: 3859 CODE:
1218 RETVAL = coro_nready; 3860 RETVAL = coro_nready;
1219 OUTPUT: 3861 OUTPUT:
1220 RETVAL 3862 RETVAL
1221 3863
1222MODULE = Coro::State PACKAGE = Coro::AIO 3864void
3865suspend (Coro::State self)
3866 PROTOTYPE: $
3867 CODE:
3868 self->flags |= CF_SUSPENDED;
3869
3870void
3871resume (Coro::State self)
3872 PROTOTYPE: $
3873 CODE:
3874 self->flags &= ~CF_SUSPENDED;
3875
3876void
3877_pool_handler (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3880
3881void
3882async_pool (SV *cv, ...)
3883 PROTOTYPE: &@
3884 PPCODE:
3885{
3886 HV *hv = (HV *)av_pop (av_async_pool);
3887 AV *av = newAV ();
3888 SV *cb = ST (0);
3889 int i;
3890
3891 av_extend (av, items - 2);
3892 for (i = 1; i < items; ++i)
3893 av_push (av, SvREFCNT_inc_NN (ST (i)));
3894
3895 if ((SV *)hv == &PL_sv_undef)
3896 {
3897 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3898 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3899 SvREFCNT_dec (sv);
3900 }
3901
3902 {
3903 struct coro *coro = SvSTATE_hv (hv);
3904
3905 assert (!coro->invoke_cb);
3906 assert (!coro->invoke_av);
3907 coro->invoke_cb = SvREFCNT_inc (cb);
3908 coro->invoke_av = av;
3909 }
3910
3911 api_ready (aTHX_ (SV *)hv);
3912
3913 if (GIMME_V != G_VOID)
3914 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3915 else
3916 SvREFCNT_dec (hv);
3917}
1223 3918
1224SV * 3919SV *
1225_get_state () 3920rouse_cb ()
3921 PROTOTYPE:
1226 CODE: 3922 CODE:
1227{ 3923 RETVAL = coro_new_rouse_cb (aTHX);
1228 struct {
1229 int errorno;
1230 int laststype;
1231 int laststatval;
1232 Stat_t statcache;
1233 } data;
1234
1235 data.errorno = errno;
1236 data.laststype = PL_laststype;
1237 data.laststatval = PL_laststatval;
1238 data.statcache = PL_statcache;
1239
1240 RETVAL = newSVpvn ((char *)&data, sizeof data);
1241}
1242 OUTPUT: 3924 OUTPUT:
1243 RETVAL 3925 RETVAL
1244 3926
1245void 3927void
1246_set_state (char *data_) 3928rouse_wait (...)
3929 PROTOTYPE: ;$
3930 PPCODE:
3931 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3932
3933void
3934on_enter (SV *block)
3935 ALIAS:
3936 on_leave = 1
1247 PROTOTYPE: $ 3937 PROTOTYPE: &
1248 CODE: 3938 CODE:
1249{ 3939{
1250 struct { 3940 struct coro *coro = SvSTATE_current;
3941 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3942
3943 block = s_get_cv_croak (block);
3944
3945 if (!*avp)
3946 *avp = newAV ();
3947
3948 av_push (*avp, SvREFCNT_inc (block));
3949
3950 if (!ix)
3951 on_enterleave_call (aTHX_ block);
3952
3953 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3954 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3955 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3956}
3957
3958
3959MODULE = Coro::State PACKAGE = PerlIO::cede
3960
3961BOOT:
3962 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3963
3964
3965MODULE = Coro::State PACKAGE = Coro::Semaphore
3966
3967SV *
3968new (SV *klass, SV *count = 0)
3969 CODE:
3970{
3971 int semcnt = 1;
3972
3973 if (count)
3974 {
3975 SvGETMAGIC (count);
3976
3977 if (SvOK (count))
3978 semcnt = SvIV (count);
3979 }
3980
3981 RETVAL = sv_bless (
3982 coro_waitarray_new (aTHX_ semcnt),
3983 GvSTASH (CvGV (cv))
3984 );
3985}
3986 OUTPUT:
3987 RETVAL
3988
3989# helper for Coro::Channel and others
3990SV *
3991_alloc (int count)
3992 CODE:
3993 RETVAL = coro_waitarray_new (aTHX_ count);
3994 OUTPUT:
3995 RETVAL
3996
3997SV *
3998count (SV *self)
3999 CODE:
4000 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4001 OUTPUT:
4002 RETVAL
4003
4004void
4005up (SV *self, int adjust = 1)
4006 ALIAS:
4007 adjust = 1
4008 CODE:
4009 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4010
4011void
4012down (...)
4013 CODE:
4014 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4015
4016void
4017wait (...)
4018 CODE:
4019 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4020
4021void
4022try (SV *self)
4023 PPCODE:
4024{
4025 AV *av = (AV *)SvRV (self);
4026 SV *count_sv = AvARRAY (av)[0];
4027 IV count = SvIVX (count_sv);
4028
4029 if (count > 0)
4030 {
4031 --count;
4032 SvIVX (count_sv) = count;
4033 XSRETURN_YES;
4034 }
4035 else
4036 XSRETURN_NO;
4037}
4038
4039void
4040waiters (SV *self)
4041 PPCODE:
4042{
4043 AV *av = (AV *)SvRV (self);
4044 int wcount = AvFILLp (av) + 1 - 1;
4045
4046 if (GIMME_V == G_SCALAR)
4047 XPUSHs (sv_2mortal (newSViv (wcount)));
4048 else
4049 {
1251 int errorno; 4050 int i;
1252 int laststype; 4051 EXTEND (SP, wcount);
1253 int laststatval; 4052 for (i = 1; i <= wcount; ++i)
1254 Stat_t statcache; 4053 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1255 } *data = (void *)data_; 4054 }
1256
1257 errno = data->errorno;
1258 PL_laststype = data->laststype;
1259 PL_laststatval = data->laststatval;
1260 PL_statcache = data->statcache;
1261} 4055}
4056
4057MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4058
4059void
4060_may_delete (SV *sem, int count, int extra_refs)
4061 PPCODE:
4062{
4063 AV *av = (AV *)SvRV (sem);
4064
4065 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4066 && AvFILLp (av) == 0 /* no waiters, just count */
4067 && SvIV (AvARRAY (av)[0]) == count)
4068 XSRETURN_YES;
4069
4070 XSRETURN_NO;
4071}
4072
4073MODULE = Coro::State PACKAGE = Coro::Signal
4074
4075SV *
4076new (SV *klass)
4077 CODE:
4078 RETVAL = sv_bless (
4079 coro_waitarray_new (aTHX_ 0),
4080 GvSTASH (CvGV (cv))
4081 );
4082 OUTPUT:
4083 RETVAL
4084
4085void
4086wait (...)
4087 CODE:
4088 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4089
4090void
4091broadcast (SV *self)
4092 CODE:
4093{
4094 AV *av = (AV *)SvRV (self);
4095 coro_signal_wake (aTHX_ av, AvFILLp (av));
4096}
4097
4098void
4099send (SV *self)
4100 CODE:
4101{
4102 AV *av = (AV *)SvRV (self);
4103
4104 if (AvFILLp (av))
4105 coro_signal_wake (aTHX_ av, 1);
4106 else
4107 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4108}
4109
4110IV
4111awaited (SV *self)
4112 CODE:
4113 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4114 OUTPUT:
4115 RETVAL
4116
4117
4118MODULE = Coro::State PACKAGE = Coro::AnyEvent
4119
4120BOOT:
4121 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4122
4123void
4124_schedule (...)
4125 CODE:
4126{
4127 static int incede;
4128
4129 api_cede_notself (aTHX);
4130
4131 ++incede;
4132 while (coro_nready >= incede && api_cede (aTHX))
4133 ;
4134
4135 sv_setsv (sv_activity, &PL_sv_undef);
4136 if (coro_nready >= incede)
4137 {
4138 PUSHMARK (SP);
4139 PUTBACK;
4140 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4141 }
4142
4143 --incede;
4144}
4145
4146
4147MODULE = Coro::State PACKAGE = Coro::AIO
4148
4149void
4150_register (char *target, char *proto, SV *req)
4151 CODE:
4152{
4153 SV *req_cv = s_get_cv_croak (req);
4154 /* newXSproto doesn't return the CV on 5.8 */
4155 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4156 sv_setpv ((SV *)slf_cv, proto);
4157 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4158}
4159
4160MODULE = Coro::State PACKAGE = Coro::Select
4161
4162void
4163patch_pp_sselect ()
4164 CODE:
4165 if (!coro_old_pp_sselect)
4166 {
4167 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4168 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4169 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4170 }
4171
4172void
4173unpatch_pp_sselect ()
4174 CODE:
4175 if (coro_old_pp_sselect)
4176 {
4177 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4178 coro_old_pp_sselect = 0;
4179 }
4180

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