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Comparing Coro/Coro/State.xs (file contents):
Revision 1.116 by root, Fri Dec 1 14:01:43 2006 UTC vs.
Revision 1.416 by root, Mon Dec 12 15:19:56 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"
17#include "ecb.h"
8 18
9#if USE_VALGRIND 19#include <stddef.h>
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42
43#include <stdio.h> 20#include <stdio.h>
44#include <errno.h> 21#include <errno.h>
22#include <assert.h>
45 23
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 24#ifndef SVs_PADSTALE
47# undef STACKGUARD 25# define SVs_PADSTALE 0
48#endif 26#endif
49 27
50#ifndef STACKGUARD 28#if defined(_WIN32)
51# define STACKGUARD 0 29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
52#endif 36#endif
53 37
54#ifdef HAVE_MMAP 38#if HAVE_MMAP
55# include <unistd.h> 39# include <unistd.h>
56# include <sys/mman.h> 40# include <sys/mman.h>
57# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
58# ifdef MAP_ANON 42# ifdef MAP_ANON
59# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
72#else 56#else
73# define PAGESIZE 0 57# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
75#endif 59#endif
76 60
77/* The next macro should declare a variable stacklevel that contains and approximation 61#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 62# include <valgrind/valgrind.h>
79 * and should be unique. */ 63#endif
80#define dSTACKLEVEL int stacklevel
81#define STACKLEVEL ((void *)&stacklevel)
82 64
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 65/* the maximum number of idle cctx that will be pooled */
66static int cctx_max_idle = 4;
84 67
68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
69# define HAS_SCOPESTACK_NAME 1
70#endif
71
72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
73# undef CORO_STACKGUARD
74#endif
75
76#ifndef CORO_STACKGUARD
77# define CORO_STACKGUARD 0
78#endif
79
80/* prefer perl internal functions over our own? */
81#ifndef CORO_PREFER_PERL_FUNCTIONS
82# define CORO_PREFER_PERL_FUNCTIONS 0
83#endif
84
85/* The next macros try to return the current stack pointer, in an as
86 * portable way as possible. */
85#if __GNUC__ >= 3 87#if __GNUC__ >= 4
86# define attribute(x) __attribute__(x) 88# define dSTACKLEVEL int stacklevel_dummy
89# define STACKLEVEL __builtin_frame_address (0)
87#else 90#else
88# define attribute(x) 91# define dSTACKLEVEL volatile void *stacklevel
92# define STACKLEVEL ((void *)&stacklevel)
89#endif 93#endif
90 94
91#define NOINLINE attribute ((noinline)) 95#define IN_DESTRUCT PL_dirty
92 96
93#include "CoroAPI.h" 97#include "CoroAPI.h"
94 98#define GCoroAPI (&coroapi) /* very sneaky */
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96 99
97#ifdef USE_ITHREADS 100#ifdef USE_ITHREADS
98static perl_mutex coro_mutex; 101# if CORO_PTHREAD
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 102static void *coro_thx;
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif 103# endif
104#endif
105 105
106/* used in state.h */
107#define VAR(name,type) VARx(name, PL_ ## name, type)
108
109#ifdef __linux
110# include <time.h> /* for timespec */
111# include <syscall.h> /* for SYS_* */
112# ifdef SYS_clock_gettime
113# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
114# define CORO_CLOCK_MONOTONIC 1
115# define CORO_CLOCK_THREAD_CPUTIME_ID 3
116# endif
117#endif
118
119static double (*nvtime)(); /* so why doesn't it take void? */
120static void (*u2time)(pTHX_ UV ret[2]);
121
122/* we hijack an hopefully unused CV flag for our purposes */
123#define CVf_SLF 0x4000
124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
126
127static U32 cctx_gen;
128static size_t cctx_stacksize = CORO_STACKSIZE;
106static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
107static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
131static JMPENV *main_top_env;
108static HV *coro_state_stash, *coro_stash; 132static HV *coro_state_stash, *coro_stash;
109static SV *coro_mortal; /* will be freed after next transfer */ 133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
134
135static AV *av_destroy; /* destruction queue */
136static SV *sv_manager; /* the manager coro */
137static SV *sv_idle; /* $Coro::idle */
138
139static GV *irsgv; /* $/ */
140static GV *stdoutgv; /* *STDOUT */
141static SV *rv_diehook;
142static SV *rv_warnhook;
143static HV *hv_sig; /* %SIG */
144
145/* async_pool helper stuff */
146static SV *sv_pool_rss;
147static SV *sv_pool_size;
148static SV *sv_async_pool_idle; /* description string */
149static AV *av_async_pool; /* idle pool */
150static SV *sv_Coro; /* class string */
151static CV *cv_pool_handler;
152
153/* Coro::AnyEvent */
154static SV *sv_activity;
155
156/* enable processtime/realtime profiling */
157static char enable_times;
158typedef U32 coro_ts[2];
159static coro_ts time_real, time_cpu;
160static char times_valid;
110 161
111static struct coro_cctx *cctx_first; 162static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 163static int cctx_count, cctx_idle;
113 164
165enum
166{
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
114/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 176typedef struct coro_cctx
177{
116 struct coro_cctx *next; 178 struct coro_cctx *next;
117 179
118 /* the stack */ 180 /* the stack */
119 void *sptr; 181 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 182 size_t ssize;
121 183
122 /* cpu state */ 184 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
124 JMPENV *top_env; 189 JMPENV *top_env;
125 coro_context cctx; 190 coro_context cctx;
126 191
127 int inuse; 192 U32 gen;
128
129#if USE_VALGRIND 193#if CORO_USE_VALGRIND
130 int valgrind_id; 194 int valgrind_id;
131#endif 195#endif
196 unsigned char flags;
132} coro_cctx; 197} coro_cctx;
133 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
134enum { 205enum
206{
135 CF_RUNNING, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
209 CF_NEW = 0x0004, /* has never been switched to */
210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
137}; 213};
138 214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218#define VARx(name,expr,type) type name;
219# include "state.h"
220#undef VARx
221} perl_slots;
222
223/* how many context stack entries do we need for perl_slots */
224#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
225
139/* this is a structure representing a perl-level coroutine */ 226/* this is a structure representing a perl-level coroutine */
140struct coro { 227struct coro
228{
141 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
142 coro_cctx *cctx; 230 coro_cctx *cctx;
143 231
232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
236 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */
239
240 CV *startcv; /* the CV to execute */
144 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
145 AV *args; 242 int flags; /* CF_ flags */
146 int refcnt; 243 HV *hv; /* the perl hash associated with this coro, if any */
147 int flags;
148 244
149 /* optionally saved, might be zero */ 245 /* statistics */
150 AV *defav; 246 int usecount; /* number of transfers to this coro */
151 SV *defsv;
152 SV *errsv;
153
154#define VAR(name,type) type name;
155# include "state.h"
156#undef VAR
157 247
158 /* coro process data */ 248 /* coro process data */
159 int prio; 249 int prio;
250 SV *except; /* exception to be thrown */
251 SV *rouse_cb; /* last rouse callback */
252 AV *on_destroy; /* callbacks or coros to notify on destroy */
253 AV *status; /* the exit status list */
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
160}; 272};
161 273
162typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
163typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
164 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the main reason we don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** JIT *********************************************************************/
300
301#if CORO_JIT
302 /* APPLE doesn't have HAVE_MMAP though */
303 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
304 #ifndef CORO_JIT_TYPE
305 #if __x86_64 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "amd64-unix"
307 #elif __i386 && CORO_JIT_UNIXY
308 #define CORO_JIT_TYPE "x86-unix"
309 #endif
310 #endif
311#endif
312
313#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
314 #undef CORO_JIT
315#endif
316
317#if CORO_JIT
318 typedef void (*load_save_perl_slots_type)(perl_slots *);
319 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
320#endif
321
322/** Coro::Select ************************************************************/
323
324static OP *(*coro_old_pp_sselect) (pTHX);
325static SV *coro_select_select;
326
327/* horrible hack, but if it works... */
165static AV * 328static OP *
329coro_pp_sselect (pTHX)
330{
331 dSP;
332 PUSHMARK (SP - 4); /* fake argument list */
333 XPUSHs (coro_select_select);
334 PUTBACK;
335
336 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
337 PL_op->op_flags |= OPf_STACKED;
338 PL_op->op_private = 0;
339 return PL_ppaddr [OP_ENTERSUB](aTHX);
340}
341
342/** time stuff **************************************************************/
343
344#ifdef HAS_GETTIMEOFDAY
345
346ecb_inline void
347coro_u2time (pTHX_ UV ret[2])
348{
349 struct timeval tv;
350 gettimeofday (&tv, 0);
351
352 ret [0] = tv.tv_sec;
353 ret [1] = tv.tv_usec;
354}
355
356ecb_inline double
357coro_nvtime (void)
358{
359 struct timeval tv;
360 gettimeofday (&tv, 0);
361
362 return tv.tv_sec + tv.tv_usec * 1e-6;
363}
364
365ecb_inline void
366time_init (pTHX)
367{
368 nvtime = coro_nvtime;
369 u2time = coro_u2time;
370}
371
372#else
373
374ecb_inline void
375time_init (pTHX)
376{
377 SV **svp;
378
379 require_pv ("Time/HiRes.pm");
380
381 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
382
383 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
384 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
385
386 nvtime = INT2PTR (double (*)(), SvIV (*svp));
387
388 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
389 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
390}
391
392#endif
393
394/** lowlevel stuff **********************************************************/
395
396static SV * ecb_noinline
397coro_get_sv (pTHX_ const char *name, int create)
398{
399#if PERL_VERSION_ATLEAST (5,10,0)
400 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
401 get_sv (name, create);
402#endif
403 return get_sv (name, create);
404}
405
406static AV * ecb_noinline
407coro_get_av (pTHX_ const char *name, int create)
408{
409#if PERL_VERSION_ATLEAST (5,10,0)
410 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
411 get_av (name, create);
412#endif
413 return get_av (name, create);
414}
415
416static HV * ecb_noinline
417coro_get_hv (pTHX_ const char *name, int create)
418{
419#if PERL_VERSION_ATLEAST (5,10,0)
420 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
421 get_hv (name, create);
422#endif
423 return get_hv (name, create);
424}
425
426ecb_inline void
427coro_times_update (void)
428{
429#ifdef coro_clock_gettime
430 struct timespec ts;
431
432 ts.tv_sec = ts.tv_nsec = 0;
433 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
434 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
435
436 ts.tv_sec = ts.tv_nsec = 0;
437 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
438 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
439#else
440 dTHX;
441 UV tv[2];
442
443 u2time (aTHX_ tv);
444 time_real [0] = tv [0];
445 time_real [1] = tv [1] * 1000;
446#endif
447}
448
449ecb_inline void
450coro_times_add (struct coro *c)
451{
452 c->t_real [1] += time_real [1];
453 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
454 c->t_real [0] += time_real [0];
455
456 c->t_cpu [1] += time_cpu [1];
457 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
458 c->t_cpu [0] += time_cpu [0];
459}
460
461ecb_inline void
462coro_times_sub (struct coro *c)
463{
464 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
465 c->t_real [1] -= time_real [1];
466 c->t_real [0] -= time_real [0];
467
468 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
469 c->t_cpu [1] -= time_cpu [1];
470 c->t_cpu [0] -= time_cpu [0];
471}
472
473/*****************************************************************************/
474/* magic glue */
475
476#define CORO_MAGIC_type_cv 26
477#define CORO_MAGIC_type_state PERL_MAGIC_ext
478
479#define CORO_MAGIC_NN(sv, type) \
480 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
481 ? SvMAGIC (sv) \
482 : mg_find (sv, type))
483
484#define CORO_MAGIC(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)) \
486 ? CORO_MAGIC_NN (sv, type) \
487 : 0)
488
489#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
490#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
491
492ecb_inline MAGIC *
493SvSTATEhv_p (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (ecb_expect_true (
498 SvTYPE (coro) == SVt_PVHV
499 && (mg = CORO_MAGIC_state (coro))
500 && mg->mg_virtual == &coro_state_vtbl
501 ))
502 return mg;
503
504 return 0;
505}
506
507ecb_inline struct coro *
508SvSTATE_ (pTHX_ SV *coro)
509{
510 MAGIC *mg;
511
512 if (SvROK (coro))
513 coro = SvRV (coro);
514
515 mg = SvSTATEhv_p (aTHX_ coro);
516 if (!mg)
517 croak ("Coro::State object required");
518
519 return (struct coro *)mg->mg_ptr;
520}
521
522#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
523
524/* faster than SvSTATE, but expects a coroutine hv */
525#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
526#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
527
528/*****************************************************************************/
529/* padlist management and caching */
530
531ecb_inline AV *
166coro_clone_padlist (CV *cv) 532coro_derive_padlist (pTHX_ CV *cv)
167{ 533{
168 AV *padlist = CvPADLIST (cv); 534 AV *padlist = CvPADLIST (cv);
169 AV *newpadlist, *newpad; 535 AV *newpadlist, *newpad;
170 536
171 newpadlist = newAV (); 537 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 538 AvREAL_off (newpadlist);
173#if PERL_VERSION_ATLEAST (5,9,0) 539#if PERL_VERSION_ATLEAST (5,10,0)
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#else 541#else
176 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 542 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
177#endif 543#endif
178 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 544 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
179 --AvFILLp (padlist); 545 --AvFILLp (padlist);
180 546
181 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 547 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
182 av_store (newpadlist, 1, (SV *)newpad); 548 av_store (newpadlist, 1, (SV *)newpad);
183 549
184 return newpadlist; 550 return newpadlist;
185} 551}
186 552
187static void 553ecb_inline void
188free_padlist (AV *padlist) 554free_padlist (pTHX_ AV *padlist)
189{ 555{
190 /* may be during global destruction */ 556 /* may be during global destruction */
191 if (SvREFCNT (padlist)) 557 if (!IN_DESTRUCT)
192 { 558 {
193 I32 i = AvFILLp (padlist); 559 I32 i = AvFILLp (padlist);
194 while (i >= 0) 560
561 while (i > 0) /* special-case index 0 */
195 { 562 {
196 SV **svp = av_fetch (padlist, i--, FALSE); 563 /* we try to be extra-careful here */
197 if (svp) 564 AV *av = (AV *)AvARRAY (padlist)[i--];
198 { 565 I32 j = AvFILLp (av);
199 SV *sv; 566
200 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 567 while (j >= 0)
568 SvREFCNT_dec (AvARRAY (av)[j--]);
569
570 AvFILLp (av) = -1;
201 SvREFCNT_dec (sv); 571 SvREFCNT_dec (av);
202
203 SvREFCNT_dec (*svp);
204 }
205 } 572 }
206 573
574 SvREFCNT_dec (AvARRAY (padlist)[0]);
575
576 AvFILLp (padlist) = -1;
207 SvREFCNT_dec ((SV*)padlist); 577 SvREFCNT_dec ((SV*)padlist);
208 } 578 }
209} 579}
210 580
211static int 581static int
212coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 582coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
213{ 583{
214 AV *padlist; 584 AV *padlist;
215 AV *av = (AV *)mg->mg_obj; 585 AV *av = (AV *)mg->mg_obj;
216 586
587 /* perl manages to free our internal AV and _then_ call us */
588 if (IN_DESTRUCT)
589 return 0;
590
217 /* casting is fun. */ 591 /* casting is fun. */
218 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 592 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219 free_padlist (padlist); 593 free_padlist (aTHX_ padlist);
220 594
221 SvREFCNT_dec (av); 595 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
222 596
223 return 0; 597 return 0;
224} 598}
225 599
226#define PERL_MAGIC_coro PERL_MAGIC_ext 600static MGVTBL coro_cv_vtbl = {
227 601 0, 0, 0, 0,
228static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 602 coro_cv_free
229 603};
230#define CORO_MAGIC(cv) \
231 SvMAGIC (cv) \
232 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
233 ? SvMAGIC (cv) \
234 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
235 : 0
236 604
237/* the next two functions merely cache the padlists */ 605/* the next two functions merely cache the padlists */
238static void 606ecb_inline void
239get_padlist (CV *cv) 607get_padlist (pTHX_ CV *cv)
240{ 608{
241 MAGIC *mg = CORO_MAGIC (cv); 609 MAGIC *mg = CORO_MAGIC_cv (cv);
242 AV *av; 610 AV *av;
243 611
244 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 612 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
245 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 613 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246 else 614 else
247 { 615 {
248#if 0 616#if CORO_PREFER_PERL_FUNCTIONS
249 /* this is probably cleaner, but also slower? */ 617 /* this is probably cleaner? but also slower! */
618 /* in practise, it seems to be less stable */
250 CV *cp = Perl_cv_clone (cv); 619 CV *cp = Perl_cv_clone (aTHX_ cv);
251 CvPADLIST (cv) = CvPADLIST (cp); 620 CvPADLIST (cv) = CvPADLIST (cp);
252 CvPADLIST (cp) = 0; 621 CvPADLIST (cp) = 0;
253 SvREFCNT_dec (cp); 622 SvREFCNT_dec (cp);
254#else 623#else
255 CvPADLIST (cv) = coro_clone_padlist (cv); 624 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
256#endif 625#endif
257 } 626 }
258} 627}
259 628
260static void 629ecb_inline void
261put_padlist (CV *cv) 630put_padlist (pTHX_ CV *cv)
262{ 631{
263 MAGIC *mg = CORO_MAGIC (cv); 632 MAGIC *mg = CORO_MAGIC_cv (cv);
264 AV *av; 633 AV *av;
265 634
266 if (!mg) 635 if (ecb_expect_false (!mg))
267 { 636 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
268 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
269 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
270 mg->mg_virtual = &vtbl_coro;
271 mg->mg_obj = (SV *)newAV ();
272 }
273 637
274 av = (AV *)mg->mg_obj; 638 av = (AV *)mg->mg_obj;
275 639
276 if (AvFILLp (av) >= AvMAX (av)) 640 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
277 av_extend (av, AvMAX (av) + 1); 641 av_extend (av, AvFILLp (av) + 1);
278 642
279 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 643 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280} 644}
281 645
282#define SB do { 646/** load & save, init *******************************************************/
283#define SE } while (0)
284 647
285#define LOAD(state) load_state((state)); 648ecb_inline void
286#define SAVE(state,flags) save_state((state),(flags)); 649swap_sv (SV *a, SV *b)
650{
651 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
652 SV tmp;
287 653
288#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 654 /* swap sv_any */
655 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
289 656
657 /* swap sv_flags */
658 SvFLAGS (&tmp) = SvFLAGS (a);
659 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
660 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
661
662#if PERL_VERSION_ATLEAST (5,10,0)
663 /* perl 5.10 and later complicates this _quite_ a bit, but it also
664 * is much faster, so no quarrels here. alternatively, we could
665 * sv_upgrade to avoid this.
666 */
667 {
668 /* swap sv_u */
669 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
670
671 /* if SvANY points to the head, we need to adjust the pointers,
672 * as the pointer for a still points to b, and maybe vice versa.
673 */
674 #define svany_in_head(type) \
675 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
676
677 if (svany_in_head (SvTYPE (a)))
678 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
679
680 if (svany_in_head (SvTYPE (b)))
681 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
682 }
683#endif
684}
685
686/* swap sv heads, at least logically */
290static void 687static void
688swap_svs (pTHX_ Coro__State c)
689{
690 int i;
691
692 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
693 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
694}
695
696#define SWAP_SVS(coro) \
697 if (ecb_expect_false ((coro)->swap_sv)) \
698 swap_svs (aTHX_ (coro))
699
700static void
701on_enterleave_call (pTHX_ SV *cb);
702
703static void
291load_state(Coro__State c) 704load_perl (pTHX_ Coro__State c)
292{ 705{
293#define VAR(name,type) PL_ ## name = c->name; 706 perl_slots *slot = c->slot;
707 c->slot = 0;
708
709 PL_mainstack = c->mainstack;
710
711#if CORO_JIT
712 load_perl_slots (slot);
713#else
714 #define VARx(name,expr,type) expr = slot->name;
294# include "state.h" 715 # include "state.h"
295#undef VAR 716 #undef VARx
296 717#endif
297 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
298 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
299 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
300 718
301 { 719 {
302 dSP; 720 dSP;
721
303 CV *cv; 722 CV *cv;
304 723
305 /* now do the ugly restore mess */ 724 /* now do the ugly restore mess */
306 while ((cv = (CV *)POPs)) 725 while (ecb_expect_true (cv = (CV *)POPs))
307 { 726 {
308 put_padlist (cv); /* mark this padlist as available */ 727 put_padlist (aTHX_ cv); /* mark this padlist as available */
309 CvDEPTH (cv) = PTR2IV (POPs); 728 CvDEPTH (cv) = PTR2IV (POPs);
310 CvPADLIST (cv) = (AV *)POPs; 729 CvPADLIST (cv) = (AV *)POPs;
311 } 730 }
312 731
313 PUTBACK; 732 PUTBACK;
314 } 733 }
315}
316 734
735 slf_frame = c->slf_frame;
736 CORO_THROW = c->except;
737
738 if (ecb_expect_false (enable_times))
739 {
740 if (ecb_expect_false (!times_valid))
741 coro_times_update ();
742
743 coro_times_sub (c);
744 }
745
746 if (ecb_expect_false (c->on_enter))
747 {
748 int i;
749
750 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
751 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
752 }
753
754 SWAP_SVS (c);
755}
756
317static void 757static void
318save_state(Coro__State c, int flags) 758save_perl (pTHX_ Coro__State c)
319{ 759{
760 SWAP_SVS (c);
761
762 if (ecb_expect_false (c->on_leave))
763 {
764 int i;
765
766 for (i = AvFILLp (c->on_leave); i >= 0; --i)
767 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
768 }
769
770 times_valid = 0;
771
772 if (ecb_expect_false (enable_times))
773 {
774 coro_times_update (); times_valid = 1;
775 coro_times_add (c);
776 }
777
778 c->except = CORO_THROW;
779 c->slf_frame = slf_frame;
780
320 { 781 {
321 dSP; 782 dSP;
322 I32 cxix = cxstack_ix; 783 I32 cxix = cxstack_ix;
323 PERL_CONTEXT *ccstk = cxstack; 784 PERL_CONTEXT *ccstk = cxstack;
324 PERL_SI *top_si = PL_curstackinfo; 785 PERL_SI *top_si = PL_curstackinfo;
… …
326 /* 787 /*
327 * the worst thing you can imagine happens first - we have to save 788 * the worst thing you can imagine happens first - we have to save
328 * (and reinitialize) all cv's in the whole callchain :( 789 * (and reinitialize) all cv's in the whole callchain :(
329 */ 790 */
330 791
331 PUSHs (Nullsv); 792 XPUSHs (Nullsv);
332 /* this loop was inspired by pp_caller */ 793 /* this loop was inspired by pp_caller */
333 for (;;) 794 for (;;)
334 { 795 {
335 while (cxix >= 0) 796 while (ecb_expect_true (cxix >= 0))
336 { 797 {
337 PERL_CONTEXT *cx = &ccstk[cxix--]; 798 PERL_CONTEXT *cx = &ccstk[cxix--];
338 799
339 if (CxTYPE(cx) == CXt_SUB) 800 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
340 { 801 {
341 CV *cv = cx->blk_sub.cv; 802 CV *cv = cx->blk_sub.cv;
342 803
343 if (CvDEPTH (cv)) 804 if (ecb_expect_true (CvDEPTH (cv)))
344 { 805 {
345 EXTEND (SP, 3); 806 EXTEND (SP, 3);
346
347 PUSHs ((SV *)CvPADLIST(cv)); 807 PUSHs ((SV *)CvPADLIST (cv));
348 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 808 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
349 PUSHs ((SV *)cv); 809 PUSHs ((SV *)cv);
350 810
351 CvDEPTH (cv) = 0; 811 CvDEPTH (cv) = 0;
352 get_padlist (cv); 812 get_padlist (aTHX_ cv);
353 } 813 }
354 } 814 }
355#ifdef CXt_FORMAT
356 else if (CxTYPE(cx) == CXt_FORMAT)
357 {
358 /* I never used formats, so how should I know how these are implemented? */
359 /* my bold guess is as a simple, plain sub... */
360 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361 }
362#endif
363 } 815 }
364 816
365 if (top_si->si_type == PERLSI_MAIN) 817 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
366 break; 818 break;
367 819
368 top_si = top_si->si_prev; 820 top_si = top_si->si_prev;
369 ccstk = top_si->si_cxstack; 821 ccstk = top_si->si_cxstack;
370 cxix = top_si->si_cxix; 822 cxix = top_si->si_cxix;
371 } 823 }
372 824
373 PUTBACK; 825 PUTBACK;
374 } 826 }
375 827
376 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 828 /* allocate some space on the context stack for our purposes */
377 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 829 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
378 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 830 {
831 unsigned int i;
379 832
380#define VAR(name,type)c->name = PL_ ## name; 833 for (i = 0; i < SLOT_COUNT; ++i)
834 CXINC;
835
836 cxstack_ix -= SLOT_COUNT; /* undo allocation */
837 }
838
839 c->mainstack = PL_mainstack;
840
841 {
842 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
843
844#if CORO_JIT
845 save_perl_slots (slot);
846#else
847 #define VARx(name,expr,type) slot->name = expr;
381# include "state.h" 848 # include "state.h"
382#undef VAR 849 #undef VARx
850#endif
851 }
383} 852}
384 853
385/* 854/*
386 * allocate various perl stacks. This is an exact copy 855 * allocate various perl stacks. This is almost an exact copy
387 * of perl.c:init_stacks, except that it uses less memory 856 * of perl.c:init_stacks, except that it uses less memory
388 * on the (sometimes correct) assumption that coroutines do 857 * on the (sometimes correct) assumption that coroutines do
389 * not usually need a lot of stackspace. 858 * not usually need a lot of stackspace.
390 */ 859 */
860#if CORO_PREFER_PERL_FUNCTIONS
861# define coro_init_stacks(thx) init_stacks ()
862#else
391static void 863static void
392coro_init_stacks () 864coro_init_stacks (pTHX)
393{ 865{
394 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 866 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
395 PL_curstackinfo->si_type = PERLSI_MAIN; 867 PL_curstackinfo->si_type = PERLSI_MAIN;
396 PL_curstack = PL_curstackinfo->si_stack; 868 PL_curstack = PL_curstackinfo->si_stack;
397 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 869 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398 870
399 PL_stack_base = AvARRAY(PL_curstack); 871 PL_stack_base = AvARRAY(PL_curstack);
400 PL_stack_sp = PL_stack_base; 872 PL_stack_sp = PL_stack_base;
401 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 873 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402 874
403 New(50,PL_tmps_stack,128,SV*); 875 New(50,PL_tmps_stack,32,SV*);
404 PL_tmps_floor = -1; 876 PL_tmps_floor = -1;
405 PL_tmps_ix = -1; 877 PL_tmps_ix = -1;
406 PL_tmps_max = 128; 878 PL_tmps_max = 32;
407 879
408 New(54,PL_markstack,32,I32); 880 New(54,PL_markstack,16,I32);
409 PL_markstack_ptr = PL_markstack; 881 PL_markstack_ptr = PL_markstack;
410 PL_markstack_max = PL_markstack + 32; 882 PL_markstack_max = PL_markstack + 16;
411 883
412#ifdef SET_MARK_OFFSET 884#ifdef SET_MARK_OFFSET
413 SET_MARK_OFFSET; 885 SET_MARK_OFFSET;
414#endif 886#endif
415 887
416 New(54,PL_scopestack,32,I32); 888 New(54,PL_scopestack,8,I32);
417 PL_scopestack_ix = 0; 889 PL_scopestack_ix = 0;
418 PL_scopestack_max = 32; 890 PL_scopestack_max = 8;
891#if HAS_SCOPESTACK_NAME
892 New(54,PL_scopestack_name,8,const char*);
893#endif
419 894
420 New(54,PL_savestack,64,ANY); 895 New(54,PL_savestack,24,ANY);
421 PL_savestack_ix = 0; 896 PL_savestack_ix = 0;
422 PL_savestack_max = 64; 897 PL_savestack_max = 24;
423 898
424#if !PERL_VERSION_ATLEAST (5,9,0) 899#if !PERL_VERSION_ATLEAST (5,10,0)
425 New(54,PL_retstack,16,OP*); 900 New(54,PL_retstack,4,OP*);
426 PL_retstack_ix = 0; 901 PL_retstack_ix = 0;
427 PL_retstack_max = 16; 902 PL_retstack_max = 4;
428#endif 903#endif
429} 904}
905#endif
430 906
431/* 907/*
432 * destroy the stacks, the callchain etc... 908 * destroy the stacks, the callchain etc...
433 */ 909 */
434static void 910static void
435coro_destroy_stacks () 911coro_destruct_stacks (pTHX)
436{ 912{
437 if (!IN_DESTRUCT)
438 {
439 /* is this ugly, I ask? */
440 LEAVE_SCOPE (0);
441
442 /* sure it is, but more important: is it correct?? :/ */
443 FREETMPS;
444
445 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
446 }
447
448 while (PL_curstackinfo->si_next) 913 while (PL_curstackinfo->si_next)
449 PL_curstackinfo = PL_curstackinfo->si_next; 914 PL_curstackinfo = PL_curstackinfo->si_next;
450 915
451 while (PL_curstackinfo) 916 while (PL_curstackinfo)
452 { 917 {
453 PERL_SI *p = PL_curstackinfo->si_prev; 918 PERL_SI *p = PL_curstackinfo->si_prev;
454 919
455 { /*D*//*remove*/
456 dSP;
457 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458 PUTBACK; /* possibly superfluous */
459 }
460
461 if (!IN_DESTRUCT) 920 if (!IN_DESTRUCT)
462 {
463 dounwind (-1);/*D*//*remove*/
464 SvREFCNT_dec (PL_curstackinfo->si_stack); 921 SvREFCNT_dec (PL_curstackinfo->si_stack);
465 }
466 922
467 Safefree (PL_curstackinfo->si_cxstack); 923 Safefree (PL_curstackinfo->si_cxstack);
468 Safefree (PL_curstackinfo); 924 Safefree (PL_curstackinfo);
469 PL_curstackinfo = p; 925 PL_curstackinfo = p;
470 } 926 }
471 927
472 Safefree (PL_tmps_stack); 928 Safefree (PL_tmps_stack);
473 Safefree (PL_markstack); 929 Safefree (PL_markstack);
474 Safefree (PL_scopestack); 930 Safefree (PL_scopestack);
931#if HAS_SCOPESTACK_NAME
932 Safefree (PL_scopestack_name);
933#endif
475 Safefree (PL_savestack); 934 Safefree (PL_savestack);
476#if !PERL_VERSION_ATLEAST (5,9,0) 935#if !PERL_VERSION_ATLEAST (5,10,0)
477 Safefree (PL_retstack); 936 Safefree (PL_retstack);
478#endif 937#endif
479} 938}
480 939
940#define CORO_RSS \
941 rss += sizeof (SYM (curstackinfo)); \
942 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
943 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
944 rss += SYM (tmps_max) * sizeof (SV *); \
945 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
946 rss += SYM (scopestack_max) * sizeof (I32); \
947 rss += SYM (savestack_max) * sizeof (ANY);
948
949static size_t
950coro_rss (pTHX_ struct coro *coro)
951{
952 size_t rss = sizeof (*coro);
953
954 if (coro->mainstack)
955 {
956 if (coro->flags & CF_RUNNING)
957 {
958 #define SYM(sym) PL_ ## sym
959 CORO_RSS;
960 #undef SYM
961 }
962 else
963 {
964 #define SYM(sym) coro->slot->sym
965 CORO_RSS;
966 #undef SYM
967 }
968 }
969
970 return rss;
971}
972
973/** coroutine stack handling ************************************************/
974
975static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
976static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
977static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
978
979/* apparently < 5.8.8 */
980#ifndef MgPV_nolen_const
981#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
982 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
983 (const char*)(mg)->mg_ptr)
984#endif
985
986/*
987 * This overrides the default magic get method of %SIG elements.
988 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
989 * and instead of trying to save and restore the hash elements (extremely slow),
990 * we just provide our own readback here.
991 */
992static int ecb_cold
993coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
994{
995 const char *s = MgPV_nolen_const (mg);
996
997 if (*s == '_')
998 {
999 SV **svp = 0;
1000
1001 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1002 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1003
1004 if (svp)
1005 {
1006 SV *ssv;
1007
1008 if (!*svp)
1009 ssv = &PL_sv_undef;
1010 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1011 ssv = sv_2mortal (newRV_inc (*svp));
1012 else
1013 ssv = *svp;
1014
1015 sv_setsv (sv, ssv);
1016 return 0;
1017 }
1018 }
1019
1020 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1021}
1022
1023static int ecb_cold
1024coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1025{
1026 const char *s = MgPV_nolen_const (mg);
1027
1028 if (*s == '_')
1029 {
1030 SV **svp = 0;
1031
1032 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1033 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1034
1035 if (svp)
1036 {
1037 SV *old = *svp;
1038 *svp = 0;
1039 SvREFCNT_dec (old);
1040 return 0;
1041 }
1042 }
1043
1044 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1045}
1046
1047static int ecb_cold
1048coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1049{
1050 const char *s = MgPV_nolen_const (mg);
1051
1052 if (*s == '_')
1053 {
1054 SV **svp = 0;
1055
1056 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1057 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1058
1059 if (svp)
1060 {
1061 SV *old = *svp;
1062 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1063 SvREFCNT_dec (old);
1064 return 0;
1065 }
1066 }
1067
1068 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1069}
1070
1071static void
1072prepare_nop (pTHX_ struct coro_transfer_args *ta)
1073{
1074 /* kind of mega-hacky, but works */
1075 ta->next = ta->prev = (struct coro *)ta;
1076}
1077
481static void 1078static int
482setup_coro (struct coro *coro) 1079slf_check_nop (pTHX_ struct CoroSLF *frame)
1080{
1081 return 0;
1082}
1083
1084static int
1085slf_check_repeat (pTHX_ struct CoroSLF *frame)
1086{
1087 return 1;
1088}
1089
1090static UNOP init_perl_op;
1091
1092ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1093init_perl (pTHX_ struct coro *coro)
483{ 1094{
484 /* 1095 /*
485 * emulate part of the perl startup here. 1096 * emulate part of the perl startup here.
486 */ 1097 */
487
488 coro_init_stacks (); 1098 coro_init_stacks (aTHX);
489 1099
1100 PL_runops = RUNOPS_DEFAULT;
1101 PL_curcop = &PL_compiling;
1102 PL_in_eval = EVAL_NULL;
490 PL_curcop = 0; 1103 PL_comppad = 0;
491 PL_in_eval = 0; 1104 PL_comppad_name = 0;
1105 PL_comppad_name_fill = 0;
1106 PL_comppad_name_floor = 0;
492 PL_curpm = 0; 1107 PL_curpm = 0;
1108 PL_curpad = 0;
1109 PL_localizing = 0;
1110 PL_restartop = 0;
1111#if PERL_VERSION_ATLEAST (5,10,0)
1112 PL_parser = 0;
1113#endif
1114 PL_hints = 0;
1115
1116 /* recreate the die/warn hooks */
1117 PL_diehook = SvREFCNT_inc (rv_diehook);
1118 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1119
1120 GvSV (PL_defgv) = newSV (0);
1121 GvAV (PL_defgv) = coro->args; coro->args = 0;
1122 GvSV (PL_errgv) = newSV (0);
1123 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1124 GvHV (PL_hintgv) = 0;
1125 PL_rs = newSVsv (GvSV (irsgv));
1126 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
493 1127
494 { 1128 {
495 dSP; 1129 dSP;
496 LOGOP myop; 1130 UNOP myop;
497 1131
498 /* I have no idea why this is needed, but it is */ 1132 Zero (&myop, 1, UNOP);
1133 myop.op_next = Nullop;
1134 myop.op_type = OP_ENTERSUB;
1135 myop.op_flags = OPf_WANT_VOID;
1136
499 PUSHMARK (SP); 1137 PUSHMARK (SP);
500 1138 PUSHs ((SV *)coro->startcv);
501 SvREFCNT_dec (GvAV (PL_defgv)); 1139 PUTBACK;
502 GvAV (PL_defgv) = coro->args; coro->args = 0;
503
504 Zero (&myop, 1, LOGOP);
505 myop.op_next = Nullop;
506 myop.op_flags = OPf_WANT_VOID;
507
508 PL_op = (OP *)&myop; 1140 PL_op = (OP *)&myop;
509
510 PUSHMARK (SP);
511 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512 PUTBACK;
513 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1141 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514 SPAGAIN;
515
516 ENTER; /* necessary e.g. for dounwind */
517 } 1142 }
518}
519 1143
1144 /* this newly created coroutine might be run on an existing cctx which most
1145 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1146 */
1147 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1148 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1149 slf_frame.destroy = 0;
1150
1151 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1152 init_perl_op.op_next = PL_op;
1153 init_perl_op.op_type = OP_ENTERSUB;
1154 init_perl_op.op_ppaddr = pp_slf;
1155 /* no flags etc. required, as an init function won't be called */
1156
1157 PL_op = (OP *)&init_perl_op;
1158
1159 /* copy throw, in case it was set before init_perl */
1160 CORO_THROW = coro->except;
1161
1162 SWAP_SVS (coro);
1163
1164 if (ecb_expect_false (enable_times))
1165 {
1166 coro_times_update ();
1167 coro_times_sub (coro);
1168 }
1169}
1170
520static void 1171static void
1172coro_unwind_stacks (pTHX)
1173{
1174 if (!IN_DESTRUCT)
1175 {
1176 /* restore all saved variables and stuff */
1177 LEAVE_SCOPE (0);
1178 assert (PL_tmps_floor == -1);
1179
1180 /* free all temporaries */
1181 FREETMPS;
1182 assert (PL_tmps_ix == -1);
1183
1184 /* unwind all extra stacks */
1185 POPSTACK_TO (PL_mainstack);
1186
1187 /* unwind main stack */
1188 dounwind (-1);
1189 }
1190}
1191
1192static void
1193destroy_perl (pTHX_ struct coro *coro)
1194{
1195 SV *svf [9];
1196
1197 {
1198 SV *old_current = SvRV (coro_current);
1199 struct coro *current = SvSTATE (old_current);
1200
1201 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1202
1203 save_perl (aTHX_ current);
1204
1205 /* this will cause transfer_check to croak on block*/
1206 SvRV_set (coro_current, (SV *)coro->hv);
1207
1208 load_perl (aTHX_ coro);
1209
1210 coro_unwind_stacks (aTHX);
1211
1212 /* restore swapped sv's */
1213 SWAP_SVS (coro);
1214
1215 coro_destruct_stacks (aTHX);
1216
1217 /* now save some sv's to be free'd later */
1218 svf [0] = GvSV (PL_defgv);
1219 svf [1] = (SV *)GvAV (PL_defgv);
1220 svf [2] = GvSV (PL_errgv);
1221 svf [3] = (SV *)PL_defoutgv;
1222 svf [4] = PL_rs;
1223 svf [5] = GvSV (irsgv);
1224 svf [6] = (SV *)GvHV (PL_hintgv);
1225 svf [7] = PL_diehook;
1226 svf [8] = PL_warnhook;
1227 assert (9 == sizeof (svf) / sizeof (*svf));
1228
1229 SvRV_set (coro_current, old_current);
1230
1231 load_perl (aTHX_ current);
1232 }
1233
1234 {
1235 unsigned int i;
1236
1237 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1238 SvREFCNT_dec (svf [i]);
1239
1240 SvREFCNT_dec (coro->saved_deffh);
1241 SvREFCNT_dec (coro->rouse_cb);
1242 SvREFCNT_dec (coro->invoke_cb);
1243 SvREFCNT_dec (coro->invoke_av);
1244 }
1245}
1246
1247ecb_inline void
521free_coro_mortal () 1248free_coro_mortal (pTHX)
522{ 1249{
523 if (coro_mortal) 1250 if (ecb_expect_true (coro_mortal))
524 { 1251 {
525 SvREFCNT_dec (coro_mortal); 1252 SvREFCNT_dec ((SV *)coro_mortal);
526 coro_mortal = 0; 1253 coro_mortal = 0;
527 } 1254 }
528} 1255}
529 1256
530static void NOINLINE
531prepare_cctx (coro_cctx *cctx)
532{
533 dSP;
534 LOGOP myop;
535
536 Zero (&myop, 1, LOGOP);
537 myop.op_next = PL_op;
538 myop.op_flags = OPf_WANT_VOID;
539
540 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541
542 PUSHMARK (SP);
543 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544 PUTBACK;
545 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
546 SPAGAIN;
547}
548
549static void 1257static int
550coro_run (void *arg) 1258runops_trace (pTHX)
551{ 1259{
552 /* coro_run is the alternative epilogue of transfer() */ 1260 COP *oldcop = 0;
553 UNLOCK; 1261 int oldcxix = -2;
554 1262
555 /* 1263 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
556 * this is a _very_ stripped down perl interpreter ;) 1264 {
557 */ 1265 PERL_ASYNC_CHECK ();
1266
1267 if (cctx_current->flags & CC_TRACE_ALL)
1268 {
1269 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1270 {
1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1272 SV **bot, **top;
1273 AV *av = newAV (); /* return values */
1274 SV **cb;
1275 dSP;
1276
1277 GV *gv = CvGV (cx->blk_sub.cv);
1278 SV *fullname = sv_2mortal (newSV (0));
1279 if (isGV (gv))
1280 gv_efullname3 (fullname, gv, 0);
1281
1282 bot = PL_stack_base + cx->blk_oldsp + 1;
1283 top = cx->blk_gimme == G_ARRAY ? SP + 1
1284 : cx->blk_gimme == G_SCALAR ? bot + 1
1285 : bot;
1286
1287 av_extend (av, top - bot);
1288 while (bot < top)
1289 av_push (av, SvREFCNT_inc_NN (*bot++));
1290
1291 PL_runops = RUNOPS_DEFAULT;
1292 ENTER;
1293 SAVETMPS;
1294 EXTEND (SP, 3);
1295 PUSHMARK (SP);
1296 PUSHs (&PL_sv_no);
1297 PUSHs (fullname);
1298 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1299 PUTBACK;
1300 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1301 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1302 SPAGAIN;
1303 FREETMPS;
1304 LEAVE;
1305 PL_runops = runops_trace;
1306 }
1307
1308 if (oldcop != PL_curcop)
1309 {
1310 oldcop = PL_curcop;
1311
1312 if (PL_curcop != &PL_compiling)
1313 {
1314 SV **cb;
1315
1316 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1317 {
1318 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1319
1320 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1321 {
1322 dSP;
1323 GV *gv = CvGV (cx->blk_sub.cv);
1324 SV *fullname = sv_2mortal (newSV (0));
1325
1326 if (isGV (gv))
1327 gv_efullname3 (fullname, gv, 0);
1328
1329 PL_runops = RUNOPS_DEFAULT;
1330 ENTER;
1331 SAVETMPS;
1332 EXTEND (SP, 3);
1333 PUSHMARK (SP);
1334 PUSHs (&PL_sv_yes);
1335 PUSHs (fullname);
1336 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1337 PUTBACK;
1338 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1339 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1340 SPAGAIN;
1341 FREETMPS;
1342 LEAVE;
1343 PL_runops = runops_trace;
1344 }
1345
1346 oldcxix = cxstack_ix;
1347 }
1348
1349 if (cctx_current->flags & CC_TRACE_LINE)
1350 {
1351 dSP;
1352
1353 PL_runops = RUNOPS_DEFAULT;
1354 ENTER;
1355 SAVETMPS;
1356 EXTEND (SP, 3);
1357 PL_runops = RUNOPS_DEFAULT;
1358 PUSHMARK (SP);
1359 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1360 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1361 PUTBACK;
1362 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1363 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1364 SPAGAIN;
1365 FREETMPS;
1366 LEAVE;
1367 PL_runops = runops_trace;
1368 }
1369 }
1370 }
1371 }
1372 }
1373
1374 TAINT_NOT;
1375 return 0;
1376}
1377
1378static struct CoroSLF cctx_ssl_frame;
1379
1380static void
1381slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1382{
1383 ta->prev = 0;
1384}
1385
1386static int
1387slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1388{
1389 *frame = cctx_ssl_frame;
1390
1391 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1392}
1393
1394/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1395static void ecb_noinline
1396cctx_prepare (pTHX)
1397{
558 PL_top_env = &PL_start_env; 1398 PL_top_env = &PL_start_env;
559 1399
1400 if (cctx_current->flags & CC_TRACE)
1401 PL_runops = runops_trace;
1402
1403 /* we already must be executing an SLF op, there is no other valid way
1404 * that can lead to creation of a new cctx */
1405 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1406 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1407
1408 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1409 cctx_ssl_frame = slf_frame;
1410
1411 slf_frame.prepare = slf_prepare_set_stacklevel;
1412 slf_frame.check = slf_check_set_stacklevel;
1413}
1414
1415/* the tail of transfer: execute stuff we can only do after a transfer */
1416ecb_inline void
1417transfer_tail (pTHX)
1418{
1419 free_coro_mortal (aTHX);
1420}
1421
1422/*
1423 * this is a _very_ stripped down perl interpreter ;)
1424 */
1425static void
1426cctx_run (void *arg)
1427{
1428#ifdef USE_ITHREADS
1429# if CORO_PTHREAD
1430 PERL_SET_CONTEXT (coro_thx);
1431# endif
1432#endif
1433 {
1434 dTHX;
1435
1436 /* normally we would need to skip the entersub here */
1437 /* not doing so will re-execute it, which is exactly what we want */
1438 /* PL_nop = PL_nop->op_next */
1439
560 /* inject call to cctx_init */ 1440 /* inject a fake subroutine call to cctx_init */
561 prepare_cctx ((coro_cctx *)arg); 1441 cctx_prepare (aTHX);
562 1442
1443 /* cctx_run is the alternative tail of transfer() */
1444 transfer_tail (aTHX);
1445
563 /* somebody will hit me for both perl_run and PL_restartop */ 1446 /* somebody or something will hit me for both perl_run and PL_restartop */
1447 PL_restartop = PL_op;
564 perl_run (PL_curinterp); 1448 perl_run (PL_curinterp);
1449 /*
1450 * Unfortunately, there is no way to get at the return values of the
1451 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1452 * runtime errors here, as this is just a random interpreter, not a thread.
1453 */
565 1454
566 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1455 /*
567 abort (); 1456 * If perl-run returns we assume exit() was being called or the coro
1457 * fell off the end, which seems to be the only valid (non-bug)
1458 * reason for perl_run to return. We try to exit by jumping to the
1459 * bootstrap-time "top" top_env, as we cannot restore the "main"
1460 * coroutine as Coro has no such concept.
1461 * This actually isn't valid with the pthread backend, but OSes requiring
1462 * that backend are too broken to do it in a standards-compliant way.
1463 */
1464 PL_top_env = main_top_env;
1465 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1466 }
568} 1467}
569 1468
570static coro_cctx * 1469static coro_cctx *
571cctx_new () 1470cctx_new (void)
572{ 1471{
573 coro_cctx *cctx; 1472 coro_cctx *cctx;
574 1473
575 ++cctx_count; 1474 ++cctx_count;
576
577 New (0, cctx, 1, coro_cctx); 1475 New (0, cctx, 1, coro_cctx);
578 1476
1477 cctx->gen = cctx_gen;
1478 cctx->flags = 0;
1479 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1480
1481 return cctx;
1482}
1483
1484/* create a new cctx only suitable as source */
1485static coro_cctx *
1486cctx_new_empty (void)
1487{
1488 coro_cctx *cctx = cctx_new ();
1489
1490 cctx->sptr = 0;
1491 coro_create (&cctx->cctx, 0, 0, 0, 0);
1492
1493 return cctx;
1494}
1495
1496/* create a new cctx suitable as destination/running a perl interpreter */
1497static coro_cctx *
1498cctx_new_run (void)
1499{
1500 coro_cctx *cctx = cctx_new ();
1501 void *stack_start;
1502 size_t stack_size;
1503
579#if HAVE_MMAP 1504#if HAVE_MMAP
580
581 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1505 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582 /* mmap suppsedly does allocate-on-write for us */ 1506 /* mmap supposedly does allocate-on-write for us */
583 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1507 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
584 1508
585 if (cctx->sptr == (void *)-1) 1509 if (cctx->sptr != (void *)-1)
1510 {
1511 #if CORO_STACKGUARD
1512 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1513 #endif
1514 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1515 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1516 cctx->flags |= CC_MAPPED;
586 { 1517 }
1518 else
1519#endif
1520 {
1521 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1522 New (0, cctx->sptr, cctx_stacksize, long);
1523
1524 if (!cctx->sptr)
1525 {
587 perror ("FATAL: unable to mmap stack for coroutine"); 1526 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
588 _exit (EXIT_FAILURE); 1527 _exit (EXIT_FAILURE);
589 } 1528 }
590 1529
591# if STACKGUARD 1530 stack_start = cctx->sptr;
592 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1531 stack_size = cctx->ssize;
593# endif
594
595#else
596
597 cctx->ssize = STACKSIZE * (long)sizeof (long);
598 New (0, cctx->sptr, STACKSIZE, long);
599
600 if (!cctx->sptr)
601 { 1532 }
602 perror ("FATAL: unable to malloc stack for coroutine");
603 _exit (EXIT_FAILURE);
604 }
605 1533
1534 #if CORO_USE_VALGRIND
1535 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
606#endif 1536 #endif
607 1537
608#if USE_VALGRIND 1538 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
609 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
610 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611 cctx->ssize + (char *)cctx->sptr
612 );
613#endif
614
615 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
616 1539
617 return cctx; 1540 return cctx;
618} 1541}
619 1542
620static void 1543static void
621cctx_destroy (coro_cctx *cctx) 1544cctx_destroy (coro_cctx *cctx)
622{ 1545{
623 if (!cctx) 1546 if (!cctx)
624 return; 1547 return;
625 1548
1549 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1550
626 --cctx_count; 1551 --cctx_count;
1552 coro_destroy (&cctx->cctx);
627 1553
628#if USE_VALGRIND 1554 /* coro_transfer creates new, empty cctx's */
1555 if (cctx->sptr)
1556 {
1557 #if CORO_USE_VALGRIND
629 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1558 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630#endif 1559 #endif
631 1560
632#if HAVE_MMAP 1561#if HAVE_MMAP
1562 if (cctx->flags & CC_MAPPED)
633 munmap (cctx->sptr, cctx->ssize); 1563 munmap (cctx->sptr, cctx->ssize);
634#else 1564 else
1565#endif
635 Safefree (cctx->sptr); 1566 Safefree (cctx->sptr);
636#endif 1567 }
637 1568
638 Safefree (cctx); 1569 Safefree (cctx);
639} 1570}
640 1571
1572/* wether this cctx should be destructed */
1573#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1574
641static coro_cctx * 1575static coro_cctx *
642cctx_get () 1576cctx_get (pTHX)
643{ 1577{
644 coro_cctx *cctx; 1578 while (ecb_expect_true (cctx_first))
645
646 if (cctx_first)
647 { 1579 {
648 cctx = cctx_first; 1580 coro_cctx *cctx = cctx_first;
649 cctx_first = cctx->next; 1581 cctx_first = cctx->next;
650 --cctx_idle; 1582 --cctx_idle;
651 } 1583
652 else 1584 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
653 { 1585 return cctx;
654 cctx = cctx_new (); 1586
655 PL_op = PL_op->op_next; 1587 cctx_destroy (cctx);
656 } 1588 }
657 1589
658 return cctx; 1590 return cctx_new_run ();
659} 1591}
660 1592
661static void 1593static void
662cctx_put (coro_cctx *cctx) 1594cctx_put (coro_cctx *cctx)
663{ 1595{
1596 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1597
664 /* free another cctx if overlimit */ 1598 /* free another cctx if overlimit */
665 if (cctx_idle >= MAX_IDLE_CCTX) 1599 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
666 { 1600 {
667 coro_cctx *first = cctx_first; 1601 coro_cctx *first = cctx_first;
668 cctx_first = first->next; 1602 cctx_first = first->next;
669 --cctx_idle; 1603 --cctx_idle;
670 1604
671 assert (!first->inuse);
672 cctx_destroy (first); 1605 cctx_destroy (first);
673 } 1606 }
674 1607
675 ++cctx_idle; 1608 ++cctx_idle;
676 cctx->next = cctx_first; 1609 cctx->next = cctx_first;
677 cctx_first = cctx; 1610 cctx_first = cctx;
678} 1611}
679 1612
680/* never call directly, always through the coro_state_transfer global variable */ 1613/** coroutine switching *****************************************************/
681static void NOINLINE 1614
1615static void
1616transfer_check (pTHX_ struct coro *prev, struct coro *next)
1617{
1618 /* TODO: throwing up here is considered harmful */
1619
1620 if (ecb_expect_true (prev != next))
1621 {
1622 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1623 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1624
1625 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1626 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1627
1628#if !PERL_VERSION_ATLEAST (5,10,0)
1629 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1630 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1631#endif
1632 }
1633}
1634
1635/* always use the TRANSFER macro */
1636static void ecb_noinline /* noinline so we have a fixed stackframe */
682transfer (struct coro *prev, struct coro *next, int flags) 1637transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
683{ 1638{
684 dSTACKLEVEL; 1639 dSTACKLEVEL;
685 1640
686 /* sometimes transfer is only called to set idle_sp */ 1641 /* sometimes transfer is only called to set idle_sp */
687 if (flags == TRANSFER_SET_STACKLEVEL) 1642 if (ecb_expect_false (!prev))
1643 {
688 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1644 cctx_current->idle_sp = STACKLEVEL;
689 else if (prev != next) 1645 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
690 { 1646 }
1647 else if (ecb_expect_true (prev != next))
1648 {
691 coro_cctx *prev__cctx; 1649 coro_cctx *cctx_prev;
692 1650
693 if (!prev->cctx) 1651 if (ecb_expect_false (prev->flags & CF_NEW))
694 { 1652 {
695 /* create a new empty context */ 1653 /* create a new empty/source context */
696 Newz (0, prev->cctx, 1, coro_cctx); 1654 prev->flags &= ~CF_NEW;
697 prev->cctx->inuse = 1;
698 prev->flags |= CF_RUNNING; 1655 prev->flags |= CF_RUNNING;
699 } 1656 }
700
701 if (!prev->flags & CF_RUNNING)
702 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703
704 if (next->flags & CF_RUNNING)
705 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706 1657
707 prev->flags &= ~CF_RUNNING; 1658 prev->flags &= ~CF_RUNNING;
708 next->flags |= CF_RUNNING; 1659 next->flags |= CF_RUNNING;
709 1660
710 LOCK; 1661 /* first get rid of the old state */
1662 save_perl (aTHX_ prev);
711 1663
712 if (next->mainstack) 1664 if (ecb_expect_false (next->flags & CF_NEW))
713 { 1665 {
714 /* coroutine already started */ 1666 /* need to start coroutine */
715 SAVE (prev, flags); 1667 next->flags &= ~CF_NEW;
716 LOAD (next); 1668 /* setup coroutine call */
1669 init_perl (aTHX_ next);
717 } 1670 }
718 else 1671 else
1672 load_perl (aTHX_ next);
1673
1674 /* possibly untie and reuse the cctx */
1675 if (ecb_expect_true (
1676 cctx_current->idle_sp == STACKLEVEL
1677 && !(cctx_current->flags & CC_TRACE)
1678 && !force_cctx
1679 ))
719 { 1680 {
720 /* need to start coroutine */ 1681 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
721 /* first get rid of the old state */ 1682 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
722 SAVE (prev, -1); 1683
723 /* setup coroutine call */ 1684 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
724 setup_coro (next); 1685 /* without this the next cctx_get might destroy the running cctx while still in use */
725 /* need a new stack */ 1686 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
726 assert (!next->stack); 1687 if (ecb_expect_true (!next->cctx))
1688 next->cctx = cctx_get (aTHX);
1689
1690 cctx_put (cctx_current);
727 } 1691 }
1692 else
1693 prev->cctx = cctx_current;
728 1694
729 prev__cctx = prev->cctx; 1695 ++next->usecount;
730 1696
731 /* possibly "free" the cctx */ 1697 cctx_prev = cctx_current;
732 if (prev__cctx->idle_sp == STACKLEVEL) 1698 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1699
1700 next->cctx = 0;
1701
1702 if (ecb_expect_false (cctx_prev != cctx_current))
733 { 1703 {
734 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1704 cctx_prev->top_env = PL_top_env;
735 assert (PL_top_env == prev__cctx->top_env); 1705 PL_top_env = cctx_current->top_env;
736 1706 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
737 cctx_put (prev__cctx);
738 prev->cctx = 0;
739 } 1707 }
740 1708
741 if (!next->cctx) 1709 transfer_tail (aTHX);
742 next->cctx = cctx_get ();
743
744 if (prev__cctx != next->cctx)
745 {
746 assert ( prev__cctx->inuse);
747 assert (!next->cctx->inuse);
748
749 prev__cctx->inuse = 0;
750 next->cctx->inuse = 1;
751
752 prev__cctx->top_env = PL_top_env;
753 PL_top_env = next->cctx->top_env;
754 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755 }
756
757 free_coro_mortal ();
758
759 UNLOCK;
760 } 1710 }
761} 1711}
762 1712
763struct transfer_args 1713#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
764{
765 struct coro *prev, *next;
766 int flags;
767};
768
769#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1714#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
770 1715
1716/** high level stuff ********************************************************/
1717
1718/* this function is actually Coro, not Coro::State, but we call it from here */
1719/* because it is convenient - but it hasn't been declared yet for that reason */
771static void 1720static void
1721coro_call_on_destroy (pTHX_ struct coro *coro);
1722
1723static void
772coro_state_destroy (struct coro *coro) 1724coro_state_destroy (pTHX_ struct coro *coro)
773{ 1725{
774 if (coro->refcnt--) 1726 if (coro->flags & CF_ZOMBIE)
775 return; 1727 return;
776 1728
1729 slf_destroy (aTHX_ coro);
1730
1731 coro->flags |= CF_ZOMBIE;
1732
777 if (coro->flags & CF_RUNNING) 1733 if (coro->flags & CF_READY)
778 croak ("FATAL: tried to destroy currently running coroutine");
779
780 if (coro->mainstack && coro->mainstack != main_mainstack)
781 {
782 struct coro temp;
783
784 SAVE ((&temp), TRANSFER_SAVE_ALL);
785 LOAD (coro);
786
787 coro_destroy_stacks ();
788
789 LOAD ((&temp)); /* this will get rid of defsv etc.. */
790
791 coro->mainstack = 0;
792 } 1734 {
1735 /* reduce nready, as destroying a ready coro effectively unreadies it */
1736 /* alternative: look through all ready queues and remove the coro */
1737 --coro_nready;
1738 }
1739 else
1740 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1741
1742 if (coro->next) coro->next->prev = coro->prev;
1743 if (coro->prev) coro->prev->next = coro->next;
1744 if (coro == coro_first) coro_first = coro->next;
1745
1746 if (coro->mainstack
1747 && coro->mainstack != main_mainstack
1748 && coro->slot
1749 && !PL_dirty)
1750 destroy_perl (aTHX_ coro);
793 1751
794 cctx_destroy (coro->cctx); 1752 cctx_destroy (coro->cctx);
1753 SvREFCNT_dec (coro->startcv);
795 SvREFCNT_dec (coro->args); 1754 SvREFCNT_dec (coro->args);
796 Safefree (coro); 1755 SvREFCNT_dec (coro->swap_sv);
1756 SvREFCNT_dec (CORO_THROW);
1757
1758 coro_call_on_destroy (aTHX_ coro);
1759
1760 /* more destruction mayhem in coro_state_free */
797} 1761}
798 1762
799static int 1763static int
800coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1764coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801{ 1765{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1766 struct coro *coro = (struct coro *)mg->mg_ptr;
803 mg->mg_ptr = 0; 1767 mg->mg_ptr = 0;
804 1768
805 coro_state_destroy (coro); 1769 coro_state_destroy (aTHX_ coro);
1770 SvREFCNT_dec (coro->on_destroy);
1771 SvREFCNT_dec (coro->status);
1772
1773 Safefree (coro);
806 1774
807 return 0; 1775 return 0;
808} 1776}
809 1777
810static int 1778static int ecb_cold
811coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1779coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
812{ 1780{
813 struct coro *coro = (struct coro *)mg->mg_ptr; 1781 /* called when perl clones the current process the slow way (windows process emulation) */
814 1782 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
815 ++coro->refcnt; 1783 mg->mg_ptr = 0;
1784 mg->mg_virtual = 0;
816 1785
817 return 0; 1786 return 0;
818} 1787}
819 1788
820static MGVTBL coro_state_vtbl = { 1789static MGVTBL coro_state_vtbl = {
821 0, 0, 0, 0, 1790 0, 0, 0, 0,
822 coro_state_clear, 1791 coro_state_free,
823 0, 1792 0,
824#ifdef MGf_DUP 1793#ifdef MGf_DUP
825 coro_state_dup, 1794 coro_state_dup,
826#else 1795#else
827# define MGf_DUP 0 1796# define MGf_DUP 0
828#endif 1797#endif
829}; 1798};
830 1799
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void 1800static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1801prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1802{
856 ta->prev = SvSTATE (prev); 1803 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1804 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1805 TRANSFER_CHECK (*ta);
859} 1806}
860 1807
861static void 1808static void
862api_transfer (SV *prev, SV *next, int flags) 1809api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1810{
1811 struct coro_transfer_args ta;
1812
1813 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1814 TRANSFER (ta, 1);
1815}
1816
1817/** Coro ********************************************************************/
1818
1819ecb_inline void
1820coro_enq (pTHX_ struct coro *coro)
1821{
1822 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1823
1824 SvREFCNT_inc_NN (coro->hv);
1825
1826 coro->next_ready = 0;
1827 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1828 ready [1] = coro;
1829}
1830
1831ecb_inline struct coro *
1832coro_deq (pTHX)
1833{
1834 int prio;
1835
1836 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1837 {
1838 struct coro **ready = coro_ready [prio];
1839
1840 if (ready [0])
1841 {
1842 struct coro *coro = ready [0];
1843 ready [0] = coro->next_ready;
1844 return coro;
1845 }
1846 }
1847
1848 return 0;
1849}
1850
1851static void
1852invoke_sv_ready_hook_helper (void)
863{ 1853{
864 dTHX; 1854 dTHX;
865 struct transfer_args ta; 1855 dSP;
866 1856
867 prepare_transfer (&ta, prev, next, flags); 1857 ENTER;
868 TRANSFER (ta); 1858 SAVETMPS;
869}
870 1859
871/** Coro ********************************************************************/ 1860 PUSHMARK (SP);
1861 PUTBACK;
1862 call_sv (coro_readyhook, G_VOID | G_DISCARD);
872 1863
873#define PRIO_MAX 3 1864 FREETMPS;
874#define PRIO_HIGH 1 1865 LEAVE;
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void
886coro_enq (SV *coro_sv)
887{
888 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
889 coro_nready++;
890}
891
892static SV *
893coro_deq (int min_prio)
894{
895 int prio = PRIO_MAX - PRIO_MIN;
896
897 min_prio -= PRIO_MIN;
898 if (min_prio < 0)
899 min_prio = 0;
900
901 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
902 if (AvFILLp (coro_ready [prio]) >= 0)
903 {
904 coro_nready--;
905 return av_shift (coro_ready [prio]);
906 }
907
908 return 0;
909} 1866}
910 1867
911static int 1868static int
912api_ready (SV *coro_sv) 1869api_ready (pTHX_ SV *coro_sv)
913{ 1870{
914 struct coro *coro;
915
916 if (SvROK (coro_sv))
917 coro_sv = SvRV (coro_sv);
918
919 coro = SvSTATE (coro_sv); 1871 struct coro *coro = SvSTATE (coro_sv);
920 1872
921 if (coro->flags & CF_READY) 1873 if (coro->flags & CF_READY)
922 return 0; 1874 return 0;
923 1875
1876 coro->flags |= CF_READY;
1877
1878 coro_enq (aTHX_ coro);
1879
1880 if (!coro_nready++)
1881 if (coroapi.readyhook)
1882 coroapi.readyhook ();
1883
1884 return 1;
1885}
1886
1887static int
1888api_is_ready (pTHX_ SV *coro_sv)
1889{
1890 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1891}
1892
1893/* expects to own a reference to next->hv */
1894ecb_inline void
1895prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1896{
1897 SV *prev_sv = SvRV (coro_current);
1898
1899 ta->prev = SvSTATE_hv (prev_sv);
1900 ta->next = next;
1901
1902 TRANSFER_CHECK (*ta);
1903
1904 SvRV_set (coro_current, (SV *)next->hv);
1905
1906 free_coro_mortal (aTHX);
1907 coro_mortal = prev_sv;
1908}
1909
1910static void
1911prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1912{
1913 for (;;)
1914 {
1915 struct coro *next = coro_deq (aTHX);
1916
1917 if (ecb_expect_true (next))
1918 {
1919 /* cannot transfer to destroyed coros, skip and look for next */
1920 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1921 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1922 else
1923 {
1924 next->flags &= ~CF_READY;
1925 --coro_nready;
1926
1927 prepare_schedule_to (aTHX_ ta, next);
1928 break;
1929 }
1930 }
1931 else
1932 {
1933 /* nothing to schedule: call the idle handler */
1934 if (SvROK (sv_idle)
1935 && SvOBJECT (SvRV (sv_idle)))
1936 {
1937 if (SvRV (sv_idle) == SvRV (coro_current))
1938 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1939
1940 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1941 api_ready (aTHX_ SvRV (sv_idle));
1942 --coro_nready;
1943 }
1944 else
1945 {
1946 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1947 dSP;
1948
1949 ENTER;
1950 SAVETMPS;
1951
1952 PUSHMARK (SP);
1953 PUTBACK;
1954 call_sv (sv_idle, G_VOID | G_DISCARD);
1955
1956 FREETMPS;
1957 LEAVE;
1958 }
1959 }
1960 }
1961}
1962
1963ecb_inline void
1964prepare_cede (pTHX_ struct coro_transfer_args *ta)
1965{
1966 api_ready (aTHX_ coro_current);
1967 prepare_schedule (aTHX_ ta);
1968}
1969
1970ecb_inline void
1971prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1972{
1973 SV *prev = SvRV (coro_current);
1974
1975 if (coro_nready)
1976 {
1977 prepare_schedule (aTHX_ ta);
1978 api_ready (aTHX_ prev);
1979 }
1980 else
1981 prepare_nop (aTHX_ ta);
1982}
1983
1984static void
1985api_schedule (pTHX)
1986{
1987 struct coro_transfer_args ta;
1988
1989 prepare_schedule (aTHX_ &ta);
1990 TRANSFER (ta, 1);
1991}
1992
1993static void
1994api_schedule_to (pTHX_ SV *coro_sv)
1995{
1996 struct coro_transfer_args ta;
1997 struct coro *next = SvSTATE (coro_sv);
1998
1999 SvREFCNT_inc_NN (coro_sv);
2000 prepare_schedule_to (aTHX_ &ta, next);
2001}
2002
2003static int
2004api_cede (pTHX)
2005{
2006 struct coro_transfer_args ta;
2007
2008 prepare_cede (aTHX_ &ta);
2009
2010 if (ecb_expect_true (ta.prev != ta.next))
2011 {
2012 TRANSFER (ta, 1);
2013 return 1;
2014 }
2015 else
2016 return 0;
2017}
2018
2019static int
2020api_cede_notself (pTHX)
2021{
2022 if (coro_nready)
2023 {
2024 struct coro_transfer_args ta;
2025
2026 prepare_cede_notself (aTHX_ &ta);
2027 TRANSFER (ta, 1);
2028 return 1;
2029 }
2030 else
2031 return 0;
2032}
2033
2034static void
2035api_trace (pTHX_ SV *coro_sv, int flags)
2036{
2037 struct coro *coro = SvSTATE (coro_sv);
2038
924 if (coro->flags & CF_RUNNING) 2039 if (coro->flags & CF_RUNNING)
925 croak ("Coro::ready called on currently running coroutine"); 2040 croak ("cannot enable tracing on a running coroutine, caught");
926 2041
927 coro->flags |= CF_READY; 2042 if (flags & CC_TRACE)
2043 {
2044 if (!coro->cctx)
2045 coro->cctx = cctx_new_run ();
2046 else if (!(coro->cctx->flags & CC_TRACE))
2047 croak ("cannot enable tracing on coroutine with custom stack, caught");
928 2048
929 LOCK; 2049 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
930 coro_enq (SvREFCNT_inc (coro_sv)); 2050 }
931 UNLOCK; 2051 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2052 {
2053 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2054
2055 if (coro->flags & CF_RUNNING)
2056 PL_runops = RUNOPS_DEFAULT;
2057 else
2058 coro->slot->runops = RUNOPS_DEFAULT;
2059 }
2060}
2061
2062static void
2063coro_push_av (pTHX_ AV *av, I32 gimme_v)
2064{
2065 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2066 {
2067 dSP;
2068
2069 if (gimme_v == G_SCALAR)
2070 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2071 else
2072 {
2073 int i;
2074 EXTEND (SP, AvFILLp (av) + 1);
2075
2076 for (i = 0; i <= AvFILLp (av); ++i)
2077 PUSHs (AvARRAY (av)[i]);
2078 }
2079
2080 PUTBACK;
2081 }
2082}
2083
2084static void
2085coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2086{
2087 if (!coro->on_destroy)
2088 coro->on_destroy = newAV ();
2089
2090 av_push (coro->on_destroy, cb);
2091}
2092
2093static void
2094slf_destroy_join (pTHX_ struct CoroSLF *frame)
2095{
2096 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2097}
2098
2099static int
2100slf_check_join (pTHX_ struct CoroSLF *frame)
2101{
2102 struct coro *coro = (struct coro *)frame->data;
2103
2104 if (!coro->status)
2105 return 1;
2106
2107 frame->destroy = 0;
2108
2109 coro_push_av (aTHX_ coro->status, GIMME_V);
2110
2111 SvREFCNT_dec ((SV *)coro->hv);
2112
2113 return 0;
2114}
2115
2116static void
2117slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2118{
2119 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2120
2121 if (items > 1)
2122 croak ("join called with too many arguments");
2123
2124 if (coro->status)
2125 frame->prepare = prepare_nop;
2126 else
2127 {
2128 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2129 frame->prepare = prepare_schedule;
2130 }
2131
2132 frame->check = slf_check_join;
2133 frame->destroy = slf_destroy_join;
2134 frame->data = (void *)coro;
2135 SvREFCNT_inc (coro->hv);
2136}
2137
2138static void
2139coro_call_on_destroy (pTHX_ struct coro *coro)
2140{
2141 AV *od = coro->on_destroy;
2142
2143 if (!od)
2144 return;
2145
2146 while (AvFILLp (od) >= 0)
2147 {
2148 SV *cb = sv_2mortal (av_pop (od));
2149
2150 /* coro hv's (and only hv's at the moment) are supported as well */
2151 if (SvSTATEhv_p (aTHX_ cb))
2152 api_ready (aTHX_ cb);
2153 else
2154 {
2155 dSP; /* don't disturb outer sp */
2156 PUSHMARK (SP);
2157
2158 if (coro->status)
2159 {
2160 PUTBACK;
2161 coro_push_av (aTHX_ coro->status, G_ARRAY);
2162 SPAGAIN;
2163 }
2164
2165 PUTBACK;
2166 call_sv (cb, G_VOID | G_DISCARD);
2167 }
2168 }
2169}
2170
2171static void
2172coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2173{
2174 AV *av;
2175
2176 if (coro->status)
2177 {
2178 av = coro->status;
2179 av_clear (av);
2180 }
2181 else
2182 av = coro->status = newAV ();
2183
2184 /* items are actually not so common, so optimise for this case */
2185 if (items)
2186 {
2187 int i;
2188
2189 av_extend (av, items - 1);
2190
2191 for (i = 0; i < items; ++i)
2192 av_push (av, SvREFCNT_inc_NN (arg [i]));
2193 }
2194}
2195
2196static void
2197slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2198{
2199 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2200 api_ready (aTHX_ sv_manager);
2201
2202 frame->prepare = prepare_schedule;
2203 frame->check = slf_check_repeat;
2204
2205 /* as a minor optimisation, we could unwind all stacks here */
2206 /* but that puts extra pressure on pp_slf, and is not worth much */
2207 /*coro_unwind_stacks (aTHX);*/
2208}
2209
2210static void
2211slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2212{
2213 HV *coro_hv = (HV *)SvRV (coro_current);
2214
2215 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2216 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2217}
2218
2219static void
2220slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2221{
2222 HV *coro_hv;
2223 struct coro *coro;
2224
2225 if (items <= 0)
2226 croak ("Coro::cancel called without coro object,");
2227
2228 coro = SvSTATE (arg [0]);
2229 coro_hv = coro->hv;
2230
2231 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2232
2233 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2234 {
2235 /* coro currently busy cancelling something, so just notify it */
2236 coro->slf_frame.data = (void *)coro;
2237
2238 frame->prepare = prepare_nop;
2239 frame->check = slf_check_nop;
2240 }
2241 else if (coro_hv == (HV *)SvRV (coro_current))
2242 {
2243 /* cancelling the current coro is allowed, and equals terminate */
2244 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2245 }
2246 else
2247 {
2248 struct coro *self = SvSTATE_current;
2249
2250 /* otherwise we cancel directly, purely for speed reasons
2251 * unfortunately, this requires some magic trickery, as
2252 * somebody else could cancel us, so we have to fight the cancellation.
2253 * this is ugly, and hopefully fully worth the extra speed.
2254 * besides, I can't get the slow-but-safe version working...
2255 */
2256 slf_frame.data = 0;
2257 self->flags |= CF_NOCANCEL;
2258 coro_state_destroy (aTHX_ coro);
2259 self->flags &= ~CF_NOCANCEL;
2260
2261 if (slf_frame.data)
2262 {
2263 /* while we were busy we have been cancelled, so terminate */
2264 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2265 }
2266 else
2267 {
2268 frame->prepare = prepare_nop;
2269 frame->check = slf_check_nop;
2270 }
2271 }
2272}
2273
2274static int
2275slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2276{
2277 frame->prepare = 0;
2278 coro_unwind_stacks (aTHX);
2279
2280 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
932 2281
933 return 1; 2282 return 1;
934} 2283}
935 2284
936static int 2285static int
937api_is_ready (SV *coro_sv) 2286safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
938{ 2287{
939 return !!SvSTATE (coro_sv)->flags & CF_READY; 2288 if (coro->cctx)
940} 2289 croak ("coro inside C callback, unable to cancel at this time, caught");
941 2290
942static void 2291 if (coro->flags & CF_NEW)
943prepare_schedule (struct transfer_args *ta) 2292 {
944{ 2293 coro_set_status (aTHX_ coro, arg, items);
945 SV *current, *prev, *next; 2294 coro_state_destroy (aTHX_ coro);
946
947 current = GvSV (coro_current);
948
949 for (;;)
950 { 2295 }
951 LOCK; 2296 else
952 next = coro_deq (PRIO_MIN); 2297 {
953 UNLOCK; 2298 if (!coro->slf_frame.prepare)
2299 croak ("coro outside an SLF function, unable to cancel at this time, caught");
954 2300
955 if (next) 2301 slf_destroy (aTHX_ coro);
956 break; 2302
2303 coro_set_status (aTHX_ coro, arg, items);
2304 coro->slf_frame.prepare = prepare_nop;
2305 coro->slf_frame.check = slf_check_safe_cancel;
2306
2307 api_ready (aTHX_ (SV *)coro->hv);
2308 }
2309
2310 return 1;
2311}
2312
2313/*****************************************************************************/
2314/* async pool handler */
2315
2316static int
2317slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2318{
2319 HV *hv = (HV *)SvRV (coro_current);
2320 struct coro *coro = (struct coro *)frame->data;
2321
2322 if (!coro->invoke_cb)
2323 return 1; /* loop till we have invoke */
2324 else
2325 {
2326 hv_store (hv, "desc", sizeof ("desc") - 1,
2327 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2328
2329 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
957 2330
958 { 2331 {
959 dSP; 2332 dSP;
960 2333 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
961 ENTER;
962 SAVETMPS;
963
964 PUSHMARK (SP);
965 PUTBACK; 2334 PUTBACK;
966 call_sv (GvSV (coro_idle), G_DISCARD);
967
968 FREETMPS;
969 LEAVE;
970 } 2335 }
2336
2337 SvREFCNT_dec (GvAV (PL_defgv));
2338 GvAV (PL_defgv) = coro->invoke_av;
2339 coro->invoke_av = 0;
2340
2341 return 0;
2342 }
2343}
2344
2345static void
2346slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2347{
2348 HV *hv = (HV *)SvRV (coro_current);
2349 struct coro *coro = SvSTATE_hv ((SV *)hv);
2350
2351 if (ecb_expect_true (coro->saved_deffh))
971 } 2352 {
2353 /* subsequent iteration */
2354 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2355 coro->saved_deffh = 0;
972 2356
973 prev = SvRV (current); 2357 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
974 SvRV (current) = next; 2358 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2359 {
2360 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2361 return;
2362 }
2363 else
2364 {
2365 av_clear (GvAV (PL_defgv));
2366 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
975 2367
976 /* free this only after the transfer */ 2368 coro->prio = 0;
977 LOCK;
978 free_coro_mortal ();
979 UNLOCK;
980 coro_mortal = prev;
981 2369
982 ta->prev = SvSTATE (prev); 2370 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
983 ta->next = SvSTATE (next); 2371 api_trace (aTHX_ coro_current, 0);
984 ta->flags = TRANSFER_SAVE_ALL;
985 2372
986 ta->next->flags &= ~CF_READY; 2373 frame->prepare = prepare_schedule;
987} 2374 av_push (av_async_pool, SvREFCNT_inc (hv));
2375 }
2376 }
2377 else
2378 {
2379 /* first iteration, simply fall through */
2380 frame->prepare = prepare_nop;
2381 }
988 2382
2383 frame->check = slf_check_pool_handler;
2384 frame->data = (void *)coro;
2385}
2386
2387/*****************************************************************************/
2388/* rouse callback */
2389
2390#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2391
2392static void
2393coro_rouse_callback (pTHX_ CV *cv)
2394{
2395 dXSARGS;
2396 SV *data = (SV *)S_GENSUB_ARG;
2397
2398 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2399 {
2400 /* first call, set args */
2401 SV *coro = SvRV (data);
2402 AV *av = newAV ();
2403
2404 SvRV_set (data, (SV *)av);
2405
2406 /* better take a full copy of the arguments */
2407 while (items--)
2408 av_store (av, items, newSVsv (ST (items)));
2409
2410 api_ready (aTHX_ coro);
2411 SvREFCNT_dec (coro);
2412 }
2413
2414 XSRETURN_EMPTY;
2415}
2416
989static void 2417static int
2418slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2419{
2420 SV *data = (SV *)frame->data;
2421
2422 if (CORO_THROW)
2423 return 0;
2424
2425 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2426 return 1;
2427
2428 /* now push all results on the stack */
2429 {
2430 dSP;
2431 AV *av = (AV *)SvRV (data);
2432 int i;
2433
2434 EXTEND (SP, AvFILLp (av) + 1);
2435 for (i = 0; i <= AvFILLp (av); ++i)
2436 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2437
2438 /* we have stolen the elements, so set length to zero and free */
2439 AvFILLp (av) = -1;
2440 av_undef (av);
2441
2442 PUTBACK;
2443 }
2444
2445 return 0;
2446}
2447
2448static void
2449slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2450{
2451 SV *cb;
2452
2453 if (items)
2454 cb = arg [0];
2455 else
2456 {
2457 struct coro *coro = SvSTATE_current;
2458
2459 if (!coro->rouse_cb)
2460 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2461
2462 cb = sv_2mortal (coro->rouse_cb);
2463 coro->rouse_cb = 0;
2464 }
2465
2466 if (!SvROK (cb)
2467 || SvTYPE (SvRV (cb)) != SVt_PVCV
2468 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2469 croak ("Coro::rouse_wait called with illegal callback argument,");
2470
2471 {
2472 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2473 SV *data = (SV *)S_GENSUB_ARG;
2474
2475 frame->data = (void *)data;
2476 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2477 frame->check = slf_check_rouse_wait;
2478 }
2479}
2480
2481static SV *
2482coro_new_rouse_cb (pTHX)
2483{
2484 HV *hv = (HV *)SvRV (coro_current);
2485 struct coro *coro = SvSTATE_hv (hv);
2486 SV *data = newRV_inc ((SV *)hv);
2487 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2488
2489 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2490 SvREFCNT_dec (data); /* magicext increases the refcount */
2491
2492 SvREFCNT_dec (coro->rouse_cb);
2493 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2494
2495 return cb;
2496}
2497
2498/*****************************************************************************/
2499/* schedule-like-function opcode (SLF) */
2500
2501static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2502static const CV *slf_cv;
2503static SV **slf_argv;
2504static int slf_argc, slf_arga; /* count, allocated */
2505static I32 slf_ax; /* top of stack, for restore */
2506
2507/* this restores the stack in the case we patched the entersub, to */
2508/* recreate the stack frame as perl will on following calls */
2509/* since entersub cleared the stack */
2510static OP *
2511pp_restore (pTHX)
2512{
2513 int i;
2514 SV **SP = PL_stack_base + slf_ax;
2515
2516 PUSHMARK (SP);
2517
2518 EXTEND (SP, slf_argc + 1);
2519
2520 for (i = 0; i < slf_argc; ++i)
2521 PUSHs (sv_2mortal (slf_argv [i]));
2522
2523 PUSHs ((SV *)CvGV (slf_cv));
2524
2525 RETURNOP (slf_restore.op_first);
2526}
2527
2528static void
2529slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2530{
2531 SV **arg = (SV **)slf_frame.data;
2532
2533 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2534}
2535
2536static void
2537slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2538{
2539 if (items != 2)
2540 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2541
2542 frame->prepare = slf_prepare_transfer;
2543 frame->check = slf_check_nop;
2544 frame->data = (void *)arg; /* let's hope it will stay valid */
2545}
2546
2547static void
2548slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 frame->prepare = prepare_schedule;
2551 frame->check = slf_check_nop;
2552}
2553
2554static void
990prepare_cede (struct transfer_args *ta) 2555slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
991{ 2556{
2557 struct coro *next = (struct coro *)slf_frame.data;
2558
2559 SvREFCNT_inc_NN (next->hv);
2560 prepare_schedule_to (aTHX_ ta, next);
2561}
2562
2563static void
2564slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2565{
2566 if (!items)
2567 croak ("Coro::schedule_to expects a coroutine argument, caught");
2568
2569 frame->data = (void *)SvSTATE (arg [0]);
2570 frame->prepare = slf_prepare_schedule_to;
2571 frame->check = slf_check_nop;
2572}
2573
2574static void
2575slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2576{
992 api_ready (GvSV (coro_current)); 2577 api_ready (aTHX_ SvRV (coro_current));
993 2578
994 prepare_schedule (ta); 2579 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
995} 2580}
996 2581
997static void 2582static void
998api_schedule (void) 2583slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
999{ 2584{
1000 dTHX; 2585 frame->prepare = prepare_cede;
2586 frame->check = slf_check_nop;
2587}
2588
2589static void
2590slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 frame->prepare = prepare_cede_notself;
2593 frame->check = slf_check_nop;
2594}
2595
2596/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2597static void
2598slf_destroy (pTHX_ struct coro *coro)
2599{
2600 /* this callback is reserved for slf functions needing to do cleanup */
2601 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2602 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2603
2604 /*
2605 * The on_destroy above most likely is from an SLF call.
2606 * Since by definition the SLF call will not finish when we destroy
2607 * the coro, we will have to force-finish it here, otherwise
2608 * cleanup functions cannot call SLF functions.
2609 */
2610 coro->slf_frame.prepare = 0;
2611}
2612
2613/*
2614 * these not obviously related functions are all rolled into one
2615 * function to increase chances that they all will call transfer with the same
2616 * stack offset
2617 * SLF stands for "schedule-like-function".
2618 */
2619static OP *
2620pp_slf (pTHX)
2621{
2622 I32 checkmark; /* mark SP to see how many elements check has pushed */
2623
2624 /* set up the slf frame, unless it has already been set-up */
2625 /* the latter happens when a new coro has been started */
2626 /* or when a new cctx was attached to an existing coroutine */
2627 if (ecb_expect_true (!slf_frame.prepare))
2628 {
2629 /* first iteration */
2630 dSP;
2631 SV **arg = PL_stack_base + TOPMARK + 1;
2632 int items = SP - arg; /* args without function object */
2633 SV *gv = *sp;
2634
2635 /* do a quick consistency check on the "function" object, and if it isn't */
2636 /* for us, divert to the real entersub */
2637 if (SvTYPE (gv) != SVt_PVGV
2638 || !GvCV (gv)
2639 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2640 return PL_ppaddr[OP_ENTERSUB](aTHX);
2641
2642 if (!(PL_op->op_flags & OPf_STACKED))
2643 {
2644 /* ampersand-form of call, use @_ instead of stack */
2645 AV *av = GvAV (PL_defgv);
2646 arg = AvARRAY (av);
2647 items = AvFILLp (av) + 1;
2648 }
2649
2650 /* now call the init function, which needs to set up slf_frame */
2651 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2652 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2653
2654 /* pop args */
2655 SP = PL_stack_base + POPMARK;
2656
2657 PUTBACK;
2658 }
2659
2660 /* now that we have a slf_frame, interpret it! */
2661 /* we use a callback system not to make the code needlessly */
2662 /* complicated, but so we can run multiple perl coros from one cctx */
2663
2664 do
2665 {
1001 struct transfer_args ta; 2666 struct coro_transfer_args ta;
1002 2667
1003 prepare_schedule (&ta); 2668 slf_frame.prepare (aTHX_ &ta);
1004 TRANSFER (ta); 2669 TRANSFER (ta, 0);
1005}
1006 2670
2671 checkmark = PL_stack_sp - PL_stack_base;
2672 }
2673 while (slf_frame.check (aTHX_ &slf_frame));
2674
2675 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2676
2677 /* exception handling */
2678 if (ecb_expect_false (CORO_THROW))
2679 {
2680 SV *exception = sv_2mortal (CORO_THROW);
2681
2682 CORO_THROW = 0;
2683 sv_setsv (ERRSV, exception);
2684 croak (0);
2685 }
2686
2687 /* return value handling - mostly like entersub */
2688 /* make sure we put something on the stack in scalar context */
2689 if (GIMME_V == G_SCALAR
2690 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2691 {
2692 dSP;
2693 SV **bot = PL_stack_base + checkmark;
2694
2695 if (sp == bot) /* too few, push undef */
2696 bot [1] = &PL_sv_undef;
2697 else /* too many, take last one */
2698 bot [1] = *sp;
2699
2700 SP = bot + 1;
2701
2702 PUTBACK;
2703 }
2704
2705 return NORMAL;
2706}
2707
2708static void
2709api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2710{
2711 int i;
2712 SV **arg = PL_stack_base + ax;
2713 int items = PL_stack_sp - arg + 1;
2714
2715 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2716
2717 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2718 && PL_op->op_ppaddr != pp_slf)
2719 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2720
2721 CvFLAGS (cv) |= CVf_SLF;
2722 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2723 slf_cv = cv;
2724
2725 /* we patch the op, and then re-run the whole call */
2726 /* we have to put the same argument on the stack for this to work */
2727 /* and this will be done by pp_restore */
2728 slf_restore.op_next = (OP *)&slf_restore;
2729 slf_restore.op_type = OP_CUSTOM;
2730 slf_restore.op_ppaddr = pp_restore;
2731 slf_restore.op_first = PL_op;
2732
2733 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2734
2735 if (PL_op->op_flags & OPf_STACKED)
2736 {
2737 if (items > slf_arga)
2738 {
2739 slf_arga = items;
2740 Safefree (slf_argv);
2741 New (0, slf_argv, slf_arga, SV *);
2742 }
2743
2744 slf_argc = items;
2745
2746 for (i = 0; i < items; ++i)
2747 slf_argv [i] = SvREFCNT_inc (arg [i]);
2748 }
2749 else
2750 slf_argc = 0;
2751
2752 PL_op->op_ppaddr = pp_slf;
2753 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2754
2755 PL_op = (OP *)&slf_restore;
2756}
2757
2758/*****************************************************************************/
2759/* dynamic wind */
2760
2761static void
2762on_enterleave_call (pTHX_ SV *cb)
2763{
2764 dSP;
2765
2766 PUSHSTACK;
2767
2768 PUSHMARK (SP);
2769 PUTBACK;
2770 call_sv (cb, G_VOID | G_DISCARD);
2771 SPAGAIN;
2772
2773 POPSTACK;
2774}
2775
2776static SV *
2777coro_avp_pop_and_free (pTHX_ AV **avp)
2778{
2779 AV *av = *avp;
2780 SV *res = av_pop (av);
2781
2782 if (AvFILLp (av) < 0)
2783 {
2784 *avp = 0;
2785 SvREFCNT_dec (av);
2786 }
2787
2788 return res;
2789}
2790
2791static void
2792coro_pop_on_enter (pTHX_ void *coro)
2793{
2794 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2795 SvREFCNT_dec (cb);
2796}
2797
2798static void
2799coro_pop_on_leave (pTHX_ void *coro)
2800{
2801 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2802 on_enterleave_call (aTHX_ sv_2mortal (cb));
2803}
2804
2805/*****************************************************************************/
2806/* PerlIO::cede */
2807
2808typedef struct
2809{
2810 PerlIOBuf base;
2811 NV next, every;
2812} PerlIOCede;
2813
2814static IV ecb_cold
2815PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2816{
2817 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2818
2819 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2820 self->next = nvtime () + self->every;
2821
2822 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2823}
2824
2825static SV * ecb_cold
2826PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2827{
2828 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2829
2830 return newSVnv (self->every);
2831}
2832
2833static IV
2834PerlIOCede_flush (pTHX_ PerlIO *f)
2835{
2836 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2837 double now = nvtime ();
2838
2839 if (now >= self->next)
2840 {
2841 api_cede (aTHX);
2842 self->next = now + self->every;
2843 }
2844
2845 return PerlIOBuf_flush (aTHX_ f);
2846}
2847
2848static PerlIO_funcs PerlIO_cede =
2849{
2850 sizeof(PerlIO_funcs),
2851 "cede",
2852 sizeof(PerlIOCede),
2853 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2854 PerlIOCede_pushed,
2855 PerlIOBuf_popped,
2856 PerlIOBuf_open,
2857 PerlIOBase_binmode,
2858 PerlIOCede_getarg,
2859 PerlIOBase_fileno,
2860 PerlIOBuf_dup,
2861 PerlIOBuf_read,
2862 PerlIOBuf_unread,
2863 PerlIOBuf_write,
2864 PerlIOBuf_seek,
2865 PerlIOBuf_tell,
2866 PerlIOBuf_close,
2867 PerlIOCede_flush,
2868 PerlIOBuf_fill,
2869 PerlIOBase_eof,
2870 PerlIOBase_error,
2871 PerlIOBase_clearerr,
2872 PerlIOBase_setlinebuf,
2873 PerlIOBuf_get_base,
2874 PerlIOBuf_bufsiz,
2875 PerlIOBuf_get_ptr,
2876 PerlIOBuf_get_cnt,
2877 PerlIOBuf_set_ptrcnt,
2878};
2879
2880/*****************************************************************************/
2881/* Coro::Semaphore & Coro::Signal */
2882
2883static SV *
2884coro_waitarray_new (pTHX_ int count)
2885{
2886 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2887 AV *av = newAV ();
2888 SV **ary;
2889
2890 /* unfortunately, building manually saves memory */
2891 Newx (ary, 2, SV *);
2892 AvALLOC (av) = ary;
2893#if PERL_VERSION_ATLEAST (5,10,0)
2894 AvARRAY (av) = ary;
2895#else
2896 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2897 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2898 SvPVX ((SV *)av) = (char *)ary;
2899#endif
2900 AvMAX (av) = 1;
2901 AvFILLp (av) = 0;
2902 ary [0] = newSViv (count);
2903
2904 return newRV_noinc ((SV *)av);
2905}
2906
2907/* semaphore */
2908
2909static void
2910coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2911{
2912 SV *count_sv = AvARRAY (av)[0];
2913 IV count = SvIVX (count_sv);
2914
2915 count += adjust;
2916 SvIVX (count_sv) = count;
2917
2918 /* now wake up as many waiters as are expected to lock */
2919 while (count > 0 && AvFILLp (av) > 0)
2920 {
2921 SV *cb;
2922
2923 /* swap first two elements so we can shift a waiter */
2924 AvARRAY (av)[0] = AvARRAY (av)[1];
2925 AvARRAY (av)[1] = count_sv;
2926 cb = av_shift (av);
2927
2928 if (SvOBJECT (cb))
2929 {
2930 api_ready (aTHX_ cb);
2931 --count;
2932 }
2933 else if (SvTYPE (cb) == SVt_PVCV)
2934 {
2935 dSP;
2936 PUSHMARK (SP);
2937 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2938 PUTBACK;
2939 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2940 }
2941
2942 SvREFCNT_dec (cb);
2943 }
2944}
2945
2946static void
2947coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2948{
2949 /* call $sem->adjust (0) to possibly wake up some other waiters */
2950 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2951}
2952
1007static void 2953static int
1008api_cede (void) 2954slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1009{ 2955{
1010 dTHX; 2956 AV *av = (AV *)frame->data;
1011 struct transfer_args ta; 2957 SV *count_sv = AvARRAY (av)[0];
2958 SV *coro_hv = SvRV (coro_current);
1012 2959
1013 prepare_cede (&ta); 2960 /* if we are about to throw, don't actually acquire the lock, just throw */
1014 TRANSFER (ta); 2961 if (CORO_THROW)
1015} 2962 return 0;
2963 else if (SvIVX (count_sv) > 0)
2964 {
2965 frame->destroy = 0;
1016 2966
2967 if (acquire)
2968 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2969 else
2970 coro_semaphore_adjust (aTHX_ av, 0);
2971
2972 return 0;
2973 }
2974 else
2975 {
2976 int i;
2977 /* if we were woken up but can't down, we look through the whole */
2978 /* waiters list and only add us if we aren't in there already */
2979 /* this avoids some degenerate memory usage cases */
2980 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2981 if (AvARRAY (av)[i] == coro_hv)
2982 return 1;
2983
2984 av_push (av, SvREFCNT_inc (coro_hv));
2985 return 1;
2986 }
2987}
2988
2989static int
2990slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2991{
2992 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2993}
2994
2995static int
2996slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2997{
2998 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2999}
3000
3001static void
3002slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3003{
3004 AV *av = (AV *)SvRV (arg [0]);
3005
3006 if (SvIVX (AvARRAY (av)[0]) > 0)
3007 {
3008 frame->data = (void *)av;
3009 frame->prepare = prepare_nop;
3010 }
3011 else
3012 {
3013 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3014
3015 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3016 frame->prepare = prepare_schedule;
3017 /* to avoid race conditions when a woken-up coro gets terminated */
3018 /* we arrange for a temporary on_destroy that calls adjust (0) */
3019 frame->destroy = coro_semaphore_destroy;
3020 }
3021}
3022
3023static void
3024slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3025{
3026 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3027 frame->check = slf_check_semaphore_down;
3028}
3029
3030static void
3031slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3032{
3033 if (items >= 2)
3034 {
3035 /* callback form */
3036 AV *av = (AV *)SvRV (arg [0]);
3037 SV *cb_cv = s_get_cv_croak (arg [1]);
3038
3039 av_push (av, SvREFCNT_inc_NN (cb_cv));
3040
3041 if (SvIVX (AvARRAY (av)[0]) > 0)
3042 coro_semaphore_adjust (aTHX_ av, 0);
3043
3044 frame->prepare = prepare_nop;
3045 frame->check = slf_check_nop;
3046 }
3047 else
3048 {
3049 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3050 frame->check = slf_check_semaphore_wait;
3051 }
3052}
3053
3054/* signal */
3055
3056static void
3057coro_signal_wake (pTHX_ AV *av, int count)
3058{
3059 SvIVX (AvARRAY (av)[0]) = 0;
3060
3061 /* now signal count waiters */
3062 while (count > 0 && AvFILLp (av) > 0)
3063 {
3064 SV *cb;
3065
3066 /* swap first two elements so we can shift a waiter */
3067 cb = AvARRAY (av)[0];
3068 AvARRAY (av)[0] = AvARRAY (av)[1];
3069 AvARRAY (av)[1] = cb;
3070
3071 cb = av_shift (av);
3072
3073 if (SvTYPE (cb) == SVt_PVCV)
3074 {
3075 dSP;
3076 PUSHMARK (SP);
3077 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3078 PUTBACK;
3079 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3080 }
3081 else
3082 {
3083 api_ready (aTHX_ cb);
3084 sv_setiv (cb, 0); /* signal waiter */
3085 }
3086
3087 SvREFCNT_dec (cb);
3088
3089 --count;
3090 }
3091}
3092
3093static int
3094slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3095{
3096 /* if we are about to throw, also stop waiting */
3097 return SvROK ((SV *)frame->data) && !CORO_THROW;
3098}
3099
3100static void
3101slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3102{
3103 AV *av = (AV *)SvRV (arg [0]);
3104
3105 if (items >= 2)
3106 {
3107 SV *cb_cv = s_get_cv_croak (arg [1]);
3108 av_push (av, SvREFCNT_inc_NN (cb_cv));
3109
3110 if (SvIVX (AvARRAY (av)[0]))
3111 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3112
3113 frame->prepare = prepare_nop;
3114 frame->check = slf_check_nop;
3115 }
3116 else if (SvIVX (AvARRAY (av)[0]))
3117 {
3118 SvIVX (AvARRAY (av)[0]) = 0;
3119 frame->prepare = prepare_nop;
3120 frame->check = slf_check_nop;
3121 }
3122 else
3123 {
3124 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3125
3126 av_push (av, waiter);
3127
3128 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3129 frame->prepare = prepare_schedule;
3130 frame->check = slf_check_signal_wait;
3131 }
3132}
3133
3134/*****************************************************************************/
3135/* Coro::AIO */
3136
3137#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3138
3139/* helper storage struct */
3140struct io_state
3141{
3142 int errorno;
3143 I32 laststype; /* U16 in 5.10.0 */
3144 int laststatval;
3145 Stat_t statcache;
3146};
3147
3148static void
3149coro_aio_callback (pTHX_ CV *cv)
3150{
3151 dXSARGS;
3152 AV *state = (AV *)S_GENSUB_ARG;
3153 SV *coro = av_pop (state);
3154 SV *data_sv = newSV (sizeof (struct io_state));
3155
3156 av_extend (state, items - 1);
3157
3158 sv_upgrade (data_sv, SVt_PV);
3159 SvCUR_set (data_sv, sizeof (struct io_state));
3160 SvPOK_only (data_sv);
3161
3162 {
3163 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3164
3165 data->errorno = errno;
3166 data->laststype = PL_laststype;
3167 data->laststatval = PL_laststatval;
3168 data->statcache = PL_statcache;
3169 }
3170
3171 /* now build the result vector out of all the parameters and the data_sv */
3172 {
3173 int i;
3174
3175 for (i = 0; i < items; ++i)
3176 av_push (state, SvREFCNT_inc_NN (ST (i)));
3177 }
3178
3179 av_push (state, data_sv);
3180
3181 api_ready (aTHX_ coro);
3182 SvREFCNT_dec (coro);
3183 SvREFCNT_dec ((AV *)state);
3184}
3185
3186static int
3187slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3188{
3189 AV *state = (AV *)frame->data;
3190
3191 /* if we are about to throw, return early */
3192 /* this does not cancel the aio request, but at least */
3193 /* it quickly returns */
3194 if (CORO_THROW)
3195 return 0;
3196
3197 /* one element that is an RV? repeat! */
3198 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3199 return 1;
3200
3201 /* restore status */
3202 {
3203 SV *data_sv = av_pop (state);
3204 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3205
3206 errno = data->errorno;
3207 PL_laststype = data->laststype;
3208 PL_laststatval = data->laststatval;
3209 PL_statcache = data->statcache;
3210
3211 SvREFCNT_dec (data_sv);
3212 }
3213
3214 /* push result values */
3215 {
3216 dSP;
3217 int i;
3218
3219 EXTEND (SP, AvFILLp (state) + 1);
3220 for (i = 0; i <= AvFILLp (state); ++i)
3221 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3222
3223 PUTBACK;
3224 }
3225
3226 return 0;
3227}
3228
3229static void
3230slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3231{
3232 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3233 SV *coro_hv = SvRV (coro_current);
3234 struct coro *coro = SvSTATE_hv (coro_hv);
3235
3236 /* put our coroutine id on the state arg */
3237 av_push (state, SvREFCNT_inc_NN (coro_hv));
3238
3239 /* first see whether we have a non-zero priority and set it as AIO prio */
3240 if (coro->prio)
3241 {
3242 dSP;
3243
3244 static SV *prio_cv;
3245 static SV *prio_sv;
3246
3247 if (ecb_expect_false (!prio_cv))
3248 {
3249 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3250 prio_sv = newSViv (0);
3251 }
3252
3253 PUSHMARK (SP);
3254 sv_setiv (prio_sv, coro->prio);
3255 XPUSHs (prio_sv);
3256
3257 PUTBACK;
3258 call_sv (prio_cv, G_VOID | G_DISCARD);
3259 }
3260
3261 /* now call the original request */
3262 {
3263 dSP;
3264 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3265 int i;
3266
3267 PUSHMARK (SP);
3268
3269 /* first push all args to the stack */
3270 EXTEND (SP, items + 1);
3271
3272 for (i = 0; i < items; ++i)
3273 PUSHs (arg [i]);
3274
3275 /* now push the callback closure */
3276 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3277
3278 /* now call the AIO function - we assume our request is uncancelable */
3279 PUTBACK;
3280 call_sv ((SV *)req, G_VOID | G_DISCARD);
3281 }
3282
3283 /* now that the request is going, we loop till we have a result */
3284 frame->data = (void *)state;
3285 frame->prepare = prepare_schedule;
3286 frame->check = slf_check_aio_req;
3287}
3288
3289static void
3290coro_aio_req_xs (pTHX_ CV *cv)
3291{
3292 dXSARGS;
3293
3294 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3295
3296 XSRETURN_EMPTY;
3297}
3298
3299/*****************************************************************************/
3300
3301#if CORO_CLONE
3302# include "clone.c"
3303#endif
3304
3305/*****************************************************************************/
3306
3307static SV *
3308coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3309{
3310 SV *coro_sv;
3311 struct coro *coro;
3312 MAGIC *mg;
3313 HV *hv;
3314 SV *cb;
3315 int i;
3316
3317 if (argc > 0)
3318 {
3319 cb = s_get_cv_croak (argv [0]);
3320
3321 if (!is_coro)
3322 {
3323 if (CvISXSUB (cb))
3324 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3325
3326 if (!CvROOT (cb))
3327 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3328 }
3329 }
3330
3331 Newz (0, coro, 1, struct coro);
3332 coro->args = newAV ();
3333 coro->flags = CF_NEW;
3334
3335 if (coro_first) coro_first->prev = coro;
3336 coro->next = coro_first;
3337 coro_first = coro;
3338
3339 coro->hv = hv = newHV ();
3340 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3341 mg->mg_flags |= MGf_DUP;
3342 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3343
3344 if (argc > 0)
3345 {
3346 av_extend (coro->args, argc + is_coro - 1);
3347
3348 if (is_coro)
3349 {
3350 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3351 cb = (SV *)cv_coro_run;
3352 }
3353
3354 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3355
3356 for (i = 1; i < argc; i++)
3357 av_push (coro->args, newSVsv (argv [i]));
3358 }
3359
3360 return coro_sv;
3361}
3362
3363#ifndef __cplusplus
3364ecb_cold XS(boot_Coro__State);
3365#endif
3366
3367#if CORO_JIT
3368
3369static void ecb_noinline ecb_cold
3370pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3371{
3372 dSP;
3373 AV *av = newAV ();
3374
3375 av_store (av, 3, newSVuv (d));
3376 av_store (av, 2, newSVuv (c));
3377 av_store (av, 1, newSVuv (b));
3378 av_store (av, 0, newSVuv (a));
3379
3380 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3381
3382 PUTBACK;
3383}
3384
3385static void ecb_noinline ecb_cold
3386jit_init (pTHX)
3387{
3388 dSP;
3389 SV *load, *save;
3390 char *map_base;
3391 char *load_ptr, *save_ptr;
3392 STRLEN load_len, save_len, map_len;
3393 int count;
3394
3395 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3396
3397 PUSHMARK (SP);
3398#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3399# include "state.h"
3400#undef VARx
3401 count = call_pv ("Coro::State::_jit", G_ARRAY);
3402 SPAGAIN;
3403
3404 save = POPs; save_ptr = SvPVbyte (save, save_len);
3405 load = POPs; load_ptr = SvPVbyte (load, load_len);
3406
3407 map_len = load_len + save_len + 16;
3408
3409 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3410
3411 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3412
3413 load_perl_slots = (load_save_perl_slots_type)map_base;
3414 memcpy (map_base, load_ptr, load_len);
3415
3416 map_base += (load_len + 15) & ~15;
3417
3418 save_perl_slots = (load_save_perl_slots_type)map_base;
3419 memcpy (map_base, save_ptr, save_len);
3420
3421 /* we are good citizens and try to make the page read-only, so the evil evil */
3422 /* hackers might have it a bit more difficult */
3423 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3424
3425 PUTBACK;
3426 eval_pv ("undef &Coro::State::_jit", 1);
3427}
3428
3429#endif
3430
1017MODULE = Coro::State PACKAGE = Coro::State 3431MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018 3432
1019PROTOTYPES: DISABLE 3433PROTOTYPES: DISABLE
1020 3434
1021BOOT: 3435BOOT:
1022{ 3436{
1023#ifdef USE_ITHREADS 3437#ifdef USE_ITHREADS
1024 MUTEX_INIT (&coro_mutex); 3438# if CORO_PTHREAD
3439 coro_thx = PERL_GET_CONTEXT;
3440# endif
1025#endif 3441#endif
1026 BOOT_PAGESIZE; 3442 BOOT_PAGESIZE;
1027 3443
3444 /* perl defines these to check for existance first, but why it doesn't */
3445 /* just create them one at init time is not clear to me, except for */
3446 /* programs trying to delete them, but... */
3447 /* anyway, we declare this as invalid and make sure they are initialised here */
3448 DEFSV;
3449 ERRSV;
3450
3451 cctx_current = cctx_new_empty ();
3452
3453 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3454 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3455
3456 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3457 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3458 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3459
3460 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3461 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3462 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3463
1028 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3464 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029 3465
1030 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3466 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3467 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3468 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3469 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1033 3470
1034 main_mainstack = PL_mainstack; 3471 main_mainstack = PL_mainstack;
3472 main_top_env = PL_top_env;
1035 3473
3474 while (main_top_env->je_prev)
3475 main_top_env = main_top_env->je_prev;
3476
3477 {
3478 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3479
3480 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3481 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3482
3483 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3484 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3485 }
3486
1036 coroapi.ver = CORO_API_VERSION; 3487 coroapi.ver = CORO_API_VERSION;
3488 coroapi.rev = CORO_API_REVISION;
3489
1037 coroapi.transfer = api_transfer; 3490 coroapi.transfer = api_transfer;
1038 3491
3492 coroapi.sv_state = SvSTATE_;
3493 coroapi.execute_slf = api_execute_slf;
3494 coroapi.prepare_nop = prepare_nop;
3495 coroapi.prepare_schedule = prepare_schedule;
3496 coroapi.prepare_cede = prepare_cede;
3497 coroapi.prepare_cede_notself = prepare_cede_notself;
3498
3499 time_init (aTHX);
3500
1039 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3501 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3502#if CORO_JIT
3503 PUTBACK;
3504 jit_init (aTHX);
3505 SPAGAIN;
3506#endif
1040} 3507}
1041 3508
1042SV * 3509SV *
1043new (char *klass, ...) 3510new (SV *klass, ...)
3511 ALIAS:
3512 Coro::new = 1
1044 CODE: 3513 CODE:
1045{ 3514 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1046 struct coro *coro; 3515 OUTPUT:
1047 HV *hv;
1048 int i;
1049
1050 Newz (0, coro, 1, struct coro);
1051 coro->args = newAV ();
1052
1053 hv = newHV ();
1054 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1055 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056
1057 for (i = 1; i < items; i++)
1058 av_push (coro->args, newSVsv (ST (i)));
1059}
1060 OUTPUT:
1061 RETVAL 3516 RETVAL
1062 3517
1063void 3518void
1064_set_stacklevel (...) 3519transfer (...)
1065 ALIAS: 3520 PROTOTYPE: $$
1066 Coro::State::transfer = 1 3521 CODE:
1067 Coro::schedule = 2 3522 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1068 Coro::cede = 3
1069 Coro::Cont::yield = 4
1070 CODE:
1071{
1072 struct transfer_args ta;
1073
1074 switch (ix)
1075 {
1076 case 0:
1077 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1078 ta.next = 0;
1079 ta.flags = TRANSFER_SET_STACKLEVEL;
1080 break;
1081
1082 case 1:
1083 if (items != 3)
1084 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1085
1086 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1087 break;
1088
1089 case 2:
1090 prepare_schedule (&ta);
1091 break;
1092
1093 case 3:
1094 prepare_cede (&ta);
1095 break;
1096
1097 case 4:
1098 {
1099 SV *yieldstack;
1100 SV *sv;
1101 AV *defav = GvAV (PL_defgv);
1102
1103 yieldstack = *hv_fetch (
1104 (HV *)SvRV (GvSV (coro_current)),
1105 "yieldstack", sizeof ("yieldstack") - 1,
1106 0
1107 );
1108
1109 /* set up @_ -- ugly */
1110 av_clear (defav);
1111 av_fill (defav, items - 1);
1112 while (items--)
1113 av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115 sv = av_pop ((AV *)SvRV (yieldstack));
1116 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1117 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1118 ta.flags = 0;
1119 SvREFCNT_dec (sv);
1120 }
1121 break;
1122
1123 }
1124
1125 TRANSFER (ta);
1126}
1127 3523
1128void 3524void
1129_clone_state_from (SV *dst, SV *src)
1130 CODE:
1131{
1132 struct coro *coro_src = SvSTATE (src);
1133
1134 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136 ++coro_src->refcnt;
1137 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1138}
1139
1140void
1141_exit (code) 3525_exit (int code)
1142 int code
1143 PROTOTYPE: $ 3526 PROTOTYPE: $
1144 CODE: 3527 CODE:
1145 _exit (code); 3528 _exit (code);
1146 3529
3530SV *
3531clone (Coro::State coro)
3532 CODE:
3533{
3534#if CORO_CLONE
3535 struct coro *ncoro = coro_clone (aTHX_ coro);
3536 MAGIC *mg;
3537 /* TODO: too much duplication */
3538 ncoro->hv = newHV ();
3539 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3540 mg->mg_flags |= MGf_DUP;
3541 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3542#else
3543 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3544#endif
3545}
3546 OUTPUT:
3547 RETVAL
3548
3549int
3550cctx_stacksize (int new_stacksize = 0)
3551 PROTOTYPE: ;$
3552 CODE:
3553 RETVAL = cctx_stacksize;
3554 if (new_stacksize)
3555 {
3556 cctx_stacksize = new_stacksize;
3557 ++cctx_gen;
3558 }
3559 OUTPUT:
3560 RETVAL
3561
3562int
3563cctx_max_idle (int max_idle = 0)
3564 PROTOTYPE: ;$
3565 CODE:
3566 RETVAL = cctx_max_idle;
3567 if (max_idle > 1)
3568 cctx_max_idle = max_idle;
3569 OUTPUT:
3570 RETVAL
3571
1147int 3572int
1148cctx_count () 3573cctx_count ()
3574 PROTOTYPE:
1149 CODE: 3575 CODE:
1150 RETVAL = cctx_count; 3576 RETVAL = cctx_count;
1151 OUTPUT: 3577 OUTPUT:
1152 RETVAL 3578 RETVAL
1153 3579
1154int 3580int
1155cctx_idle () 3581cctx_idle ()
3582 PROTOTYPE:
1156 CODE: 3583 CODE:
1157 RETVAL = cctx_idle; 3584 RETVAL = cctx_idle;
1158 OUTPUT: 3585 OUTPUT:
1159 RETVAL 3586 RETVAL
1160 3587
3588void
3589list ()
3590 PROTOTYPE:
3591 PPCODE:
3592{
3593 struct coro *coro;
3594 for (coro = coro_first; coro; coro = coro->next)
3595 if (coro->hv)
3596 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3597}
3598
3599void
3600call (Coro::State coro, SV *coderef)
3601 ALIAS:
3602 eval = 1
3603 CODE:
3604{
3605 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3606 {
3607 struct coro *current = SvSTATE_current;
3608 struct CoroSLF slf_save;
3609
3610 if (current != coro)
3611 {
3612 PUTBACK;
3613 save_perl (aTHX_ current);
3614 load_perl (aTHX_ coro);
3615 /* the coro is most likely in an active SLF call.
3616 * while not strictly required (the code we execute is
3617 * not allowed to call any SLF functions), it's cleaner
3618 * to reinitialise the slf_frame and restore it later.
3619 * This might one day allow us to actually do SLF calls
3620 * from code executed here.
3621 */
3622 slf_save = slf_frame;
3623 slf_frame.prepare = 0;
3624 SPAGAIN;
3625 }
3626
3627 PUSHSTACK;
3628
3629 PUSHMARK (SP);
3630 PUTBACK;
3631
3632 if (ix)
3633 eval_sv (coderef, 0);
3634 else
3635 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3636
3637 POPSTACK;
3638 SPAGAIN;
3639
3640 if (current != coro)
3641 {
3642 PUTBACK;
3643 slf_frame = slf_save;
3644 save_perl (aTHX_ coro);
3645 load_perl (aTHX_ current);
3646 SPAGAIN;
3647 }
3648 }
3649}
3650
3651SV *
3652is_ready (Coro::State coro)
3653 PROTOTYPE: $
3654 ALIAS:
3655 is_ready = CF_READY
3656 is_running = CF_RUNNING
3657 is_new = CF_NEW
3658 is_destroyed = CF_ZOMBIE
3659 is_zombie = CF_ZOMBIE
3660 is_suspended = CF_SUSPENDED
3661 CODE:
3662 RETVAL = boolSV (coro->flags & ix);
3663 OUTPUT:
3664 RETVAL
3665
3666void
3667throw (Coro::State self, SV *exception = &PL_sv_undef)
3668 PROTOTYPE: $;$
3669 CODE:
3670{
3671 struct coro *current = SvSTATE_current;
3672 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3673 SvREFCNT_dec (*exceptionp);
3674 SvGETMAGIC (exception);
3675 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3676}
3677
3678void
3679api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3680 PROTOTYPE: $;$
3681 C_ARGS: aTHX_ coro, flags
3682
3683SV *
3684has_cctx (Coro::State coro)
3685 PROTOTYPE: $
3686 CODE:
3687 /* maybe manage the running flag differently */
3688 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3689 OUTPUT:
3690 RETVAL
3691
3692int
3693is_traced (Coro::State coro)
3694 PROTOTYPE: $
3695 CODE:
3696 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3697 OUTPUT:
3698 RETVAL
3699
3700UV
3701rss (Coro::State coro)
3702 PROTOTYPE: $
3703 ALIAS:
3704 usecount = 1
3705 CODE:
3706 switch (ix)
3707 {
3708 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3709 case 1: RETVAL = coro->usecount; break;
3710 }
3711 OUTPUT:
3712 RETVAL
3713
3714void
3715force_cctx ()
3716 PROTOTYPE:
3717 CODE:
3718 cctx_current->idle_sp = 0;
3719
3720void
3721swap_defsv (Coro::State self)
3722 PROTOTYPE: $
3723 ALIAS:
3724 swap_defav = 1
3725 CODE:
3726 if (!self->slot)
3727 croak ("cannot swap state with coroutine that has no saved state,");
3728 else
3729 {
3730 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3731 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3732
3733 SV *tmp = *src; *src = *dst; *dst = tmp;
3734 }
3735
3736void
3737cancel (Coro::State self)
3738 CODE:
3739 coro_state_destroy (aTHX_ self);
3740
3741SV *
3742enable_times (int enabled = enable_times)
3743 CODE:
3744{
3745 RETVAL = boolSV (enable_times);
3746
3747 if (enabled != enable_times)
3748 {
3749 enable_times = enabled;
3750
3751 coro_times_update ();
3752 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3753 }
3754}
3755 OUTPUT:
3756 RETVAL
3757
3758void
3759times (Coro::State self)
3760 PPCODE:
3761{
3762 struct coro *current = SvSTATE (coro_current);
3763
3764 if (ecb_expect_false (current == self))
3765 {
3766 coro_times_update ();
3767 coro_times_add (SvSTATE (coro_current));
3768 }
3769
3770 EXTEND (SP, 2);
3771 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3772 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3773
3774 if (ecb_expect_false (current == self))
3775 coro_times_sub (SvSTATE (coro_current));
3776}
3777
3778void
3779swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3780 CODE:
3781{
3782 struct coro *current = SvSTATE_current;
3783
3784 if (current == coro)
3785 SWAP_SVS (current);
3786
3787 if (!coro->swap_sv)
3788 coro->swap_sv = newAV ();
3789
3790 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3791 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3792
3793 if (current == coro)
3794 SWAP_SVS (current);
3795}
3796
3797
1161MODULE = Coro::State PACKAGE = Coro 3798MODULE = Coro::State PACKAGE = Coro
1162 3799
1163BOOT: 3800BOOT:
1164{ 3801{
1165 int i; 3802 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3803 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3804 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3805 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3806 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3807 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3808 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3809 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1166 3810
3811 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3812 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3813 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3814 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3815
1167 coro_stash = gv_stashpv ("Coro", TRUE); 3816 coro_stash = gv_stashpv ("Coro", TRUE);
1168 3817
1169 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3818 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1170 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3819 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1171 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3820 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1172 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3821 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1173 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3822 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1174 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3823 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1175
1176 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1177 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1178
1179 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180 coro_ready[i] = newAV ();
1181 3824
1182 { 3825 {
1183 SV *sv = perl_get_sv("Coro::API", 1); 3826 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1184 3827
1185 coroapi.schedule = api_schedule; 3828 coroapi.schedule = api_schedule;
3829 coroapi.schedule_to = api_schedule_to;
1186 coroapi.cede = api_cede; 3830 coroapi.cede = api_cede;
3831 coroapi.cede_notself = api_cede_notself;
1187 coroapi.ready = api_ready; 3832 coroapi.ready = api_ready;
1188 coroapi.is_ready = api_is_ready; 3833 coroapi.is_ready = api_is_ready;
1189 coroapi.nready = &coro_nready; 3834 coroapi.nready = coro_nready;
1190 coroapi.current = coro_current; 3835 coroapi.current = coro_current;
1191 3836
1192 GCoroAPI = &coroapi; 3837 /*GCoroAPI = &coroapi;*/
1193 sv_setiv (sv, (IV)&coroapi); 3838 sv_setiv (sv, (IV)&coroapi);
1194 SvREADONLY_on (sv); 3839 SvREADONLY_on (sv);
1195 } 3840 }
1196} 3841}
1197 3842
3843SV *
3844async (...)
3845 PROTOTYPE: &@
3846 CODE:
3847 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3848 api_ready (aTHX_ RETVAL);
3849 OUTPUT:
3850 RETVAL
3851
3852void
3853_destroy (Coro::State coro)
3854 CODE:
3855 /* used by the manager thread */
3856 coro_state_destroy (aTHX_ coro);
3857
3858void
3859on_destroy (Coro::State coro, SV *cb)
3860 CODE:
3861 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3862
3863void
3864join (...)
3865 CODE:
3866 CORO_EXECUTE_SLF_XS (slf_init_join);
3867
3868void
3869terminate (...)
3870 CODE:
3871 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3872
3873void
3874cancel (...)
3875 CODE:
3876 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3877
3878int
3879safe_cancel (Coro::State self, ...)
3880 C_ARGS: aTHX_ self, &ST (1), items - 1
3881
3882void
3883schedule (...)
3884 CODE:
3885 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3886
3887void
3888schedule_to (...)
3889 CODE:
3890 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3891
3892void
3893cede_to (...)
3894 CODE:
3895 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3896
3897void
3898cede (...)
3899 CODE:
3900 CORO_EXECUTE_SLF_XS (slf_init_cede);
3901
3902void
3903cede_notself (...)
3904 CODE:
3905 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3906
3907void
3908_set_current (SV *current)
3909 PROTOTYPE: $
3910 CODE:
3911 SvREFCNT_dec (SvRV (coro_current));
3912 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3913
3914void
3915_set_readyhook (SV *hook)
3916 PROTOTYPE: $
3917 CODE:
3918 SvREFCNT_dec (coro_readyhook);
3919 SvGETMAGIC (hook);
3920 if (SvOK (hook))
3921 {
3922 coro_readyhook = newSVsv (hook);
3923 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3924 }
3925 else
3926 {
3927 coro_readyhook = 0;
3928 CORO_READYHOOK = 0;
3929 }
3930
1198int 3931int
1199prio (Coro::State coro, int newprio = 0) 3932prio (Coro::State coro, int newprio = 0)
3933 PROTOTYPE: $;$
1200 ALIAS: 3934 ALIAS:
1201 nice = 1 3935 nice = 1
1202 CODE: 3936 CODE:
1203{ 3937{
1204 RETVAL = coro->prio; 3938 RETVAL = coro->prio;
1205 3939
1206 if (items > 1) 3940 if (items > 1)
1207 { 3941 {
1208 if (ix) 3942 if (ix)
1209 newprio += coro->prio; 3943 newprio = coro->prio - newprio;
1210 3944
1211 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3945 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1212 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3946 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1213 3947
1214 coro->prio = newprio; 3948 coro->prio = newprio;
1215 } 3949 }
1216} 3950}
3951 OUTPUT:
3952 RETVAL
1217 3953
1218SV * 3954SV *
1219ready (SV *self) 3955ready (SV *self)
1220 PROTOTYPE: $ 3956 PROTOTYPE: $
1221 CODE: 3957 CODE:
1222 RETVAL = boolSV (api_ready (self)); 3958 RETVAL = boolSV (api_ready (aTHX_ self));
1223 OUTPUT:
1224 RETVAL
1225
1226SV *
1227is_ready (SV *self)
1228 PROTOTYPE: $
1229 CODE:
1230 RETVAL = boolSV (api_is_ready (self));
1231 OUTPUT: 3959 OUTPUT:
1232 RETVAL 3960 RETVAL
1233 3961
1234int 3962int
1235nready (...) 3963nready (...)
… …
1237 CODE: 3965 CODE:
1238 RETVAL = coro_nready; 3966 RETVAL = coro_nready;
1239 OUTPUT: 3967 OUTPUT:
1240 RETVAL 3968 RETVAL
1241 3969
1242MODULE = Coro::State PACKAGE = Coro::AIO 3970void
3971suspend (Coro::State self)
3972 PROTOTYPE: $
3973 CODE:
3974 self->flags |= CF_SUSPENDED;
3975
3976void
3977resume (Coro::State self)
3978 PROTOTYPE: $
3979 CODE:
3980 self->flags &= ~CF_SUSPENDED;
3981
3982void
3983_pool_handler (...)
3984 CODE:
3985 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3986
3987void
3988async_pool (SV *cv, ...)
3989 PROTOTYPE: &@
3990 PPCODE:
3991{
3992 HV *hv = (HV *)av_pop (av_async_pool);
3993 AV *av = newAV ();
3994 SV *cb = ST (0);
3995 int i;
3996
3997 av_extend (av, items - 2);
3998 for (i = 1; i < items; ++i)
3999 av_push (av, SvREFCNT_inc_NN (ST (i)));
4000
4001 if ((SV *)hv == &PL_sv_undef)
4002 {
4003 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4004 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4005 SvREFCNT_dec (sv);
4006 }
4007
4008 {
4009 struct coro *coro = SvSTATE_hv (hv);
4010
4011 assert (!coro->invoke_cb);
4012 assert (!coro->invoke_av);
4013 coro->invoke_cb = SvREFCNT_inc (cb);
4014 coro->invoke_av = av;
4015 }
4016
4017 api_ready (aTHX_ (SV *)hv);
4018
4019 if (GIMME_V != G_VOID)
4020 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4021 else
4022 SvREFCNT_dec (hv);
4023}
1243 4024
1244SV * 4025SV *
1245_get_state () 4026rouse_cb ()
4027 PROTOTYPE:
1246 CODE: 4028 CODE:
1247{ 4029 RETVAL = coro_new_rouse_cb (aTHX);
1248 struct {
1249 int errorno;
1250 int laststype;
1251 int laststatval;
1252 Stat_t statcache;
1253 } data;
1254
1255 data.errorno = errno;
1256 data.laststype = PL_laststype;
1257 data.laststatval = PL_laststatval;
1258 data.statcache = PL_statcache;
1259
1260 RETVAL = newSVpvn ((char *)&data, sizeof data);
1261}
1262 OUTPUT: 4030 OUTPUT:
1263 RETVAL 4031 RETVAL
1264 4032
1265void 4033void
1266_set_state (char *data_) 4034rouse_wait (...)
4035 PROTOTYPE: ;$
4036 PPCODE:
4037 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4038
4039void
4040on_enter (SV *block)
4041 ALIAS:
4042 on_leave = 1
1267 PROTOTYPE: $ 4043 PROTOTYPE: &
1268 CODE: 4044 CODE:
1269{ 4045{
1270 struct { 4046 struct coro *coro = SvSTATE_current;
4047 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4048
4049 block = s_get_cv_croak (block);
4050
4051 if (!*avp)
4052 *avp = newAV ();
4053
4054 av_push (*avp, SvREFCNT_inc (block));
4055
4056 if (!ix)
4057 on_enterleave_call (aTHX_ block);
4058
4059 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4060 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4061 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4062}
4063
4064
4065MODULE = Coro::State PACKAGE = PerlIO::cede
4066
4067BOOT:
4068 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4069
4070
4071MODULE = Coro::State PACKAGE = Coro::Semaphore
4072
4073SV *
4074new (SV *klass, SV *count = 0)
4075 CODE:
4076{
4077 int semcnt = 1;
4078
4079 if (count)
4080 {
4081 SvGETMAGIC (count);
4082
4083 if (SvOK (count))
4084 semcnt = SvIV (count);
4085 }
4086
4087 RETVAL = sv_bless (
4088 coro_waitarray_new (aTHX_ semcnt),
4089 GvSTASH (CvGV (cv))
4090 );
4091}
4092 OUTPUT:
4093 RETVAL
4094
4095# helper for Coro::Channel and others
4096SV *
4097_alloc (int count)
4098 CODE:
4099 RETVAL = coro_waitarray_new (aTHX_ count);
4100 OUTPUT:
4101 RETVAL
4102
4103SV *
4104count (SV *self)
4105 CODE:
4106 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4107 OUTPUT:
4108 RETVAL
4109
4110void
4111up (SV *self, int adjust = 1)
4112 ALIAS:
4113 adjust = 1
4114 CODE:
4115 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4116
4117void
4118down (...)
4119 CODE:
4120 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4121
4122void
4123wait (...)
4124 CODE:
4125 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4126
4127void
4128try (SV *self)
4129 PPCODE:
4130{
4131 AV *av = (AV *)SvRV (self);
4132 SV *count_sv = AvARRAY (av)[0];
4133 IV count = SvIVX (count_sv);
4134
4135 if (count > 0)
4136 {
4137 --count;
4138 SvIVX (count_sv) = count;
4139 XSRETURN_YES;
4140 }
4141 else
4142 XSRETURN_NO;
4143}
4144
4145void
4146waiters (SV *self)
4147 PPCODE:
4148{
4149 AV *av = (AV *)SvRV (self);
4150 int wcount = AvFILLp (av) + 1 - 1;
4151
4152 if (GIMME_V == G_SCALAR)
4153 XPUSHs (sv_2mortal (newSViv (wcount)));
4154 else
4155 {
1271 int errorno; 4156 int i;
1272 int laststype; 4157 EXTEND (SP, wcount);
1273 int laststatval; 4158 for (i = 1; i <= wcount; ++i)
1274 Stat_t statcache; 4159 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1275 } *data = (void *)data_; 4160 }
1276
1277 errno = data->errorno;
1278 PL_laststype = data->laststype;
1279 PL_laststatval = data->laststatval;
1280 PL_statcache = data->statcache;
1281} 4161}
4162
4163MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4164
4165void
4166_may_delete (SV *sem, int count, unsigned int extra_refs)
4167 PPCODE:
4168{
4169 AV *av = (AV *)SvRV (sem);
4170
4171 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4172 && AvFILLp (av) == 0 /* no waiters, just count */
4173 && SvIV (AvARRAY (av)[0]) == count)
4174 XSRETURN_YES;
4175
4176 XSRETURN_NO;
4177}
4178
4179MODULE = Coro::State PACKAGE = Coro::Signal
4180
4181SV *
4182new (SV *klass)
4183 CODE:
4184 RETVAL = sv_bless (
4185 coro_waitarray_new (aTHX_ 0),
4186 GvSTASH (CvGV (cv))
4187 );
4188 OUTPUT:
4189 RETVAL
4190
4191void
4192wait (...)
4193 CODE:
4194 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4195
4196void
4197broadcast (SV *self)
4198 CODE:
4199{
4200 AV *av = (AV *)SvRV (self);
4201 coro_signal_wake (aTHX_ av, AvFILLp (av));
4202}
4203
4204void
4205send (SV *self)
4206 CODE:
4207{
4208 AV *av = (AV *)SvRV (self);
4209
4210 if (AvFILLp (av))
4211 coro_signal_wake (aTHX_ av, 1);
4212 else
4213 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4214}
4215
4216IV
4217awaited (SV *self)
4218 CODE:
4219 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4220 OUTPUT:
4221 RETVAL
4222
4223
4224MODULE = Coro::State PACKAGE = Coro::AnyEvent
4225
4226BOOT:
4227 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4228
4229void
4230_schedule (...)
4231 CODE:
4232{
4233 static int incede;
4234
4235 api_cede_notself (aTHX);
4236
4237 ++incede;
4238 while (coro_nready >= incede && api_cede (aTHX))
4239 ;
4240
4241 sv_setsv (sv_activity, &PL_sv_undef);
4242 if (coro_nready >= incede)
4243 {
4244 PUSHMARK (SP);
4245 PUTBACK;
4246 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4247 }
4248
4249 --incede;
4250}
4251
4252
4253MODULE = Coro::State PACKAGE = Coro::AIO
4254
4255void
4256_register (char *target, char *proto, SV *req)
4257 CODE:
4258{
4259 SV *req_cv = s_get_cv_croak (req);
4260 /* newXSproto doesn't return the CV on 5.8 */
4261 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4262 sv_setpv ((SV *)slf_cv, proto);
4263 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4264}
4265
4266MODULE = Coro::State PACKAGE = Coro::Select
4267
4268void
4269patch_pp_sselect ()
4270 CODE:
4271 if (!coro_old_pp_sselect)
4272 {
4273 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4274 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4275 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4276 }
4277
4278void
4279unpatch_pp_sselect ()
4280 CODE:
4281 if (coro_old_pp_sselect)
4282 {
4283 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4284 coro_old_pp_sselect = 0;
4285 }
4286

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