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Comparing Coro/Coro/State.xs (file contents):
Revision 1.118 by root, Fri Dec 1 19:58:53 2006 UTC vs.
Revision 1.418 by root, Mon Feb 20 00:03:07 2012 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 = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 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) */
138}; 213};
139 214
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
140/* this is a structure representing a perl-level coroutine */ 226/* this is a structure representing a perl-level coroutine */
141struct coro { 227struct coro
228{
142 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
143 coro_cctx *cctx; 230 coro_cctx *cctx;
144 231
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 */
145 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
146 AV *args; 242 int flags; /* CF_ flags */
147 int refcnt; 243 HV *hv; /* the perl hash associated with this coro, if any */
148 int flags;
149 244
150 /* optionally saved, might be zero */ 245 /* statistics */
151 AV *defav; 246 int usecount; /* number of transfers to this coro */
152 SV *defsv;
153 SV *errsv;
154
155#define VAR(name,type) type name;
156# include "state.h"
157#undef VAR
158 247
159 /* coro process data */ 248 /* coro process data */
160 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;
161}; 272};
162 273
163typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
165 276
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... */
166static 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 *
167coro_clone_padlist (CV *cv) 532coro_derive_padlist (pTHX_ CV *cv)
168{ 533{
169 AV *padlist = CvPADLIST (cv); 534 AV *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 535 AV *newpadlist, *newpad;
171 536
172 newpadlist = newAV (); 537 newpadlist = newAV ();
173 AvREAL_off (newpadlist); 538 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0) 539#if PERL_VERSION_ATLEAST (5,10,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else 541#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 542 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 543#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 544 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist); 545 --AvFILLp (padlist);
181 546
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 547 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
183 av_store (newpadlist, 1, (SV *)newpad); 548 av_store (newpadlist, 1, (SV *)newpad);
184 549
185 return newpadlist; 550 return newpadlist;
186} 551}
187 552
188static void 553ecb_inline void
189free_padlist (AV *padlist) 554free_padlist (pTHX_ AV *padlist)
190{ 555{
191 /* may be during global destruction */ 556 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 557 if (!IN_DESTRUCT)
193 { 558 {
194 I32 i = AvFILLp (padlist); 559 I32 i = AvFILLp (padlist);
195 while (i >= 0) 560
561 while (i > 0) /* special-case index 0 */
196 { 562 {
197 SV **svp = av_fetch (padlist, i--, FALSE); 563 /* we try to be extra-careful here */
198 if (svp) 564 AV *av = (AV *)AvARRAY (padlist)[i--];
199 { 565 I32 j = AvFILLp (av);
200 SV *sv; 566
201 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 567 while (j >= 0)
568 SvREFCNT_dec (AvARRAY (av)[j--]);
569
570 AvFILLp (av) = -1;
202 SvREFCNT_dec (sv); 571 SvREFCNT_dec (av);
203
204 SvREFCNT_dec (*svp);
205 }
206 } 572 }
207 573
574 SvREFCNT_dec (AvARRAY (padlist)[0]);
575
576 AvFILLp (padlist) = -1;
208 SvREFCNT_dec ((SV*)padlist); 577 SvREFCNT_dec ((SV*)padlist);
209 } 578 }
210} 579}
211 580
212static int 581static int
213coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 582coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
214{ 583{
215 AV *padlist; 584 AV *padlist;
216 AV *av = (AV *)mg->mg_obj; 585 AV *av = (AV *)mg->mg_obj;
217 586
587 /* perl manages to free our internal AV and _then_ call us */
588 if (IN_DESTRUCT)
589 return 0;
590
218 /* casting is fun. */ 591 /* casting is fun. */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 592 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220 free_padlist (padlist); 593 free_padlist (aTHX_ padlist);
221 594
222 SvREFCNT_dec (av); 595 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
223 596
224 return 0; 597 return 0;
225} 598}
226 599
227#define PERL_MAGIC_coro PERL_MAGIC_ext 600static MGVTBL coro_cv_vtbl = {
228 601 0, 0, 0, 0,
229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 602 coro_cv_free
230 603};
231#define CORO_MAGIC(cv) \
232 SvMAGIC (cv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234 ? SvMAGIC (cv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
236 : 0
237 604
238/* the next two functions merely cache the padlists */ 605/* the next two functions merely cache the padlists */
239static void 606ecb_inline void
240get_padlist (CV *cv) 607get_padlist (pTHX_ CV *cv)
241{ 608{
242 MAGIC *mg = CORO_MAGIC (cv); 609 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 610 AV *av;
244 611
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 612 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 613 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247 else 614 else
248 { 615 {
249#if 0 616#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 617 /* this is probably cleaner? but also slower! */
618 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 619 CV *cp = Perl_cv_clone (aTHX_ cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 620 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 621 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 622 SvREFCNT_dec (cp);
255#else 623#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 624 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
257#endif 625#endif
258 } 626 }
259} 627}
260 628
261static void 629ecb_inline void
262put_padlist (CV *cv) 630put_padlist (pTHX_ CV *cv)
263{ 631{
264 MAGIC *mg = CORO_MAGIC (cv); 632 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 633 AV *av;
266 634
267 if (!mg) 635 if (ecb_expect_false (!mg))
268 { 636 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 }
274 637
275 av = (AV *)mg->mg_obj; 638 av = (AV *)mg->mg_obj;
276 639
277 if (AvFILLp (av) >= AvMAX (av)) 640 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
278 av_extend (av, AvMAX (av) + 1); 641 av_extend (av, AvFILLp (av) + 1);
279 642
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 643 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 644}
282 645
283#define SB do { 646/** load & save, init *******************************************************/
284#define SE } while (0)
285 647
286#define LOAD(state) load_state ((state)) 648ecb_inline void
287#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;
288 653
289#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);
290 656
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 */
291static 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
292load_state (Coro__State c) 704load_perl (pTHX_ Coro__State c)
293{ 705{
294#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;
295# include "state.h" 715 # include "state.h"
296#undef VAR 716 #undef VARx
297 717#endif
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 718
302 { 719 {
303 dSP; 720 dSP;
721
304 CV *cv; 722 CV *cv;
305 723
306 /* now do the ugly restore mess */ 724 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 725 while (ecb_expect_true (cv = (CV *)POPs))
308 { 726 {
309 put_padlist (cv); /* mark this padlist as available */ 727 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 728 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 729 CvPADLIST (cv) = (AV *)POPs;
312 } 730 }
313 731
314 PUTBACK; 732 PUTBACK;
315 } 733 }
316}
317 734
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
318static void 757static void
319save_state (Coro__State c, int flags) 758save_perl (pTHX_ Coro__State c)
320{ 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
321 { 781 {
322 dSP; 782 dSP;
323 I32 cxix = cxstack_ix; 783 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 784 PERL_CONTEXT *ccstk = cxstack;
325 PERL_SI *top_si = PL_curstackinfo; 785 PERL_SI *top_si = PL_curstackinfo;
… …
327 /* 787 /*
328 * 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
329 * (and reinitialize) all cv's in the whole callchain :( 789 * (and reinitialize) all cv's in the whole callchain :(
330 */ 790 */
331 791
332 PUSHs (Nullsv); 792 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 793 /* this loop was inspired by pp_caller */
334 for (;;) 794 for (;;)
335 { 795 {
336 while (cxix >= 0) 796 while (ecb_expect_true (cxix >= 0))
337 { 797 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 798 PERL_CONTEXT *cx = &ccstk[cxix--];
339 799
340 if (CxTYPE (cx) == CXt_SUB) 800 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
341 { 801 {
342 CV *cv = cx->blk_sub.cv; 802 CV *cv = cx->blk_sub.cv;
343 803
344 if (CvDEPTH (cv)) 804 if (ecb_expect_true (CvDEPTH (cv)))
345 { 805 {
346 EXTEND (SP, 3); 806 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 807 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 808 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 809 PUSHs ((SV *)cv);
351 810
352 CvDEPTH (cv) = 0; 811 CvDEPTH (cv) = 0;
353 get_padlist (cv); 812 get_padlist (aTHX_ cv);
354 } 813 }
355 } 814 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 815 }
365 816
366 if (top_si->si_type == PERLSI_MAIN) 817 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 818 break;
368 819
369 top_si = top_si->si_prev; 820 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 821 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 822 cxix = top_si->si_cxix;
372 } 823 }
373 824
374 PUTBACK; 825 PUTBACK;
375 } 826 }
376 827
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 828 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 829 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 830 {
831 unsigned int i;
380 832
381#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;
382# include "state.h" 848 # include "state.h"
383#undef VAR 849 #undef VARx
850#endif
851 }
384} 852}
385 853
386/* 854/*
387 * allocate various perl stacks. This is an exact copy 855 * allocate various perl stacks. This is almost an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 856 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 857 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 858 * not usually need a lot of stackspace.
391 */ 859 */
860#if CORO_PREFER_PERL_FUNCTIONS
861# define coro_init_stacks(thx) init_stacks ()
862#else
392static void 863static void
393coro_init_stacks () 864coro_init_stacks (pTHX)
394{ 865{
395 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() */
396 PL_curstackinfo->si_type = PERLSI_MAIN; 867 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 868 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 869 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 870
400 PL_stack_base = AvARRAY(PL_curstack); 871 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 872 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 873 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 874
404 New(50,PL_tmps_stack,128,SV*); 875 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 876 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 877 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 878 PL_tmps_max = 32;
408 879
409 New(54,PL_markstack,32,I32); 880 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 881 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 882 PL_markstack_max = PL_markstack + 16;
412 883
413#ifdef SET_MARK_OFFSET 884#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 885 SET_MARK_OFFSET;
415#endif 886#endif
416 887
417 New(54,PL_scopestack,32,I32); 888 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 889 PL_scopestack_ix = 0;
419 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
420 894
421 New(54,PL_savestack,64,ANY); 895 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 896 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 897 PL_savestack_max = 24;
424 898
425#if !PERL_VERSION_ATLEAST (5,9,0) 899#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 900 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 901 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 902 PL_retstack_max = 4;
429#endif 903#endif
430} 904}
905#endif
431 906
432/* 907/*
433 * destroy the stacks, the callchain etc... 908 * destroy the stacks, the callchain etc...
434 */ 909 */
435static void 910static void
436coro_destroy_stacks () 911coro_destruct_stacks (pTHX)
437{ 912{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 913 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 914 PL_curstackinfo = PL_curstackinfo->si_next;
451 915
452 while (PL_curstackinfo) 916 while (PL_curstackinfo)
453 { 917 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 918 PERL_SI *p = PL_curstackinfo->si_prev;
455 919
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 920 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 921 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 922
468 Safefree (PL_curstackinfo->si_cxstack); 923 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 924 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 925 PL_curstackinfo = p;
471 } 926 }
472 927
473 Safefree (PL_tmps_stack); 928 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 929 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 930 Safefree (PL_scopestack);
931#if HAS_SCOPESTACK_NAME
932 Safefree (PL_scopestack_name);
933#endif
476 Safefree (PL_savestack); 934 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 935#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 936 Safefree (PL_retstack);
479#endif 937#endif
480} 938}
481 939
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
482static void 1078static int
483setup_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)
484{ 1094{
485 /* 1095 /*
486 * emulate part of the perl startup here. 1096 * emulate part of the perl startup here.
487 */ 1097 */
488
489 coro_init_stacks (); 1098 coro_init_stacks (aTHX);
490 1099
1100 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 1101 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 1102 PL_in_eval = EVAL_NULL;
1103 PL_comppad = 0;
1104 PL_comppad_name = 0;
1105 PL_comppad_name_fill = 0;
1106 PL_comppad_name_floor = 0;
493 PL_curpm = 0; 1107 PL_curpm = 0;
1108 PL_curpad = 0;
494 PL_localizing = 0; 1109 PL_localizing = 0;
495 PL_dirty = 0;
496 PL_restartop = 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);
497 1127
498 { 1128 {
499 dSP; 1129 dSP;
500 LOGOP myop; 1130 UNOP myop;
501 1131
502 /* 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
503 PUSHMARK (SP); 1137 PUSHMARK (SP);
504 1138 PUSHs ((SV *)coro->startcv);
505 SvREFCNT_dec (GvAV (PL_defgv)); 1139 PUTBACK;
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP);
509 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID;
511
512 PL_op = (OP *)&myop; 1140 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1141 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN;
519 } 1142 }
520 1143
521 ENTER; /* necessary e.g. for dounwind */ 1144 /* this newly created coroutine might be run on an existing cctx which most
522} 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;
523 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
524static 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
525free_coro_mortal () 1248free_coro_mortal (pTHX)
526{ 1249{
527 if (coro_mortal) 1250 if (ecb_expect_true (coro_mortal))
528 { 1251 {
529 SvREFCNT_dec (coro_mortal); 1252 SvREFCNT_dec ((SV *)coro_mortal);
530 coro_mortal = 0; 1253 coro_mortal = 0;
531 } 1254 }
532} 1255}
533 1256
534static void NOINLINE
535prepare_cctx (coro_cctx *cctx)
536{
537 dSP;
538 LOGOP myop;
539
540 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545
546 PUSHMARK (SP);
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN;
551}
552
553static void 1257static int
554coro_run (void *arg) 1258runops_trace (pTHX)
555{ 1259{
556 /* coro_run is the alternative epilogue of transfer() */ 1260 COP *oldcop = 0;
557 UNLOCK; 1261 int oldcxix = -2;
558 1262
559 /* 1263 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
560 * this is a _very_ stripped down perl interpreter ;) 1264 {
561 */ 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{
562 PL_top_env = &PL_start_env; 1398 PL_top_env = &PL_start_env;
563 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/* try to exit the same way perl's main function would do */
1423/* we do not bother resetting the environment or other things *7
1424/* that are not, uhm, essential */
1425/* this obviously also doesn't work when perl is embedded */
1426static void ecb_noinline ecb_cold
1427perlish_exit (void)
1428{
1429 int exitstatus = perl_destruct (PL_curinterp);
1430 perl_free (PL_curinterp);
1431 exit (exitstatus);
1432}
1433
1434/*
1435 * this is a _very_ stripped down perl interpreter ;)
1436 */
1437static void
1438cctx_run (void *arg)
1439{
1440#ifdef USE_ITHREADS
1441# if CORO_PTHREAD
1442 PERL_SET_CONTEXT (coro_thx);
1443# endif
1444#endif
1445 {
1446 dTHX;
1447
1448 /* normally we would need to skip the entersub here */
1449 /* not doing so will re-execute it, which is exactly what we want */
1450 /* PL_nop = PL_nop->op_next */
1451
564 /* inject call to cctx_init */ 1452 /* inject a fake subroutine call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg); 1453 cctx_prepare (aTHX);
566 1454
1455 /* cctx_run is the alternative tail of transfer() */
1456 transfer_tail (aTHX);
1457
567 /* somebody will hit me for both perl_run and PL_restartop */ 1458 /* somebody or something will hit me for both perl_run and PL_restartop */
1459 PL_restartop = PL_op;
568 perl_run (PL_curinterp); 1460 perl_run (PL_curinterp);
1461 /*
1462 * Unfortunately, there is no way to get at the return values of the
1463 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1464 * runtime errors here, as this is just a random interpreter, not a thread.
1465 */
569 1466
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1467 /*
571 abort (); 1468 * If perl-run returns we assume exit() was being called or the coro
1469 * fell off the end, which seems to be the only valid (non-bug)
1470 * reason for perl_run to return. We try to mimic whatever perl is normally
1471 * doing in that case. YMMV.
1472 */
1473 perlish_exit ();
1474 }
572} 1475}
573 1476
574static coro_cctx * 1477static coro_cctx *
575cctx_new () 1478cctx_new (void)
576{ 1479{
577 coro_cctx *cctx; 1480 coro_cctx *cctx;
578 1481
579 ++cctx_count; 1482 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1483 New (0, cctx, 1, coro_cctx);
582 1484
1485 cctx->gen = cctx_gen;
1486 cctx->flags = 0;
1487 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1488
1489 return cctx;
1490}
1491
1492/* create a new cctx only suitable as source */
1493static coro_cctx *
1494cctx_new_empty (void)
1495{
1496 coro_cctx *cctx = cctx_new ();
1497
1498 cctx->sptr = 0;
1499 coro_create (&cctx->cctx, 0, 0, 0, 0);
1500
1501 return cctx;
1502}
1503
1504/* create a new cctx suitable as destination/running a perl interpreter */
1505static coro_cctx *
1506cctx_new_run (void)
1507{
1508 coro_cctx *cctx = cctx_new ();
1509 void *stack_start;
1510 size_t stack_size;
1511
583#if HAVE_MMAP 1512#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1513 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */ 1514 /* mmap supposedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1515 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
588 1516
589 if (cctx->sptr == (void *)-1) 1517 if (cctx->sptr != (void *)-1)
1518 {
1519 #if CORO_STACKGUARD
1520 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1521 #endif
1522 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1523 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1524 cctx->flags |= CC_MAPPED;
590 { 1525 }
1526 else
1527#endif
1528 {
1529 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1530 New (0, cctx->sptr, cctx_stacksize, long);
1531
1532 if (!cctx->sptr)
1533 {
591 perror ("FATAL: unable to mmap stack for coroutine"); 1534 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
592 _exit (EXIT_FAILURE); 1535 _exit (EXIT_FAILURE);
593 } 1536 }
594 1537
595# if STACKGUARD 1538 stack_start = cctx->sptr;
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1539 stack_size = cctx->ssize;
597# endif
598
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 { 1540 }
606 perror ("FATAL: unable to malloc stack for coroutine");
607 _exit (EXIT_FAILURE);
608 }
609 1541
1542 #if CORO_USE_VALGRIND
1543 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
610#endif 1544 #endif
611 1545
612#if USE_VALGRIND 1546 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620 1547
621 return cctx; 1548 return cctx;
622} 1549}
623 1550
624static void 1551static void
625cctx_destroy (coro_cctx *cctx) 1552cctx_destroy (coro_cctx *cctx)
626{ 1553{
627 if (!cctx) 1554 if (!cctx)
628 return; 1555 return;
629 1556
1557 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1558
630 --cctx_count; 1559 --cctx_count;
1560 coro_destroy (&cctx->cctx);
631 1561
632#if USE_VALGRIND 1562 /* coro_transfer creates new, empty cctx's */
1563 if (cctx->sptr)
1564 {
1565 #if CORO_USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1566 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif 1567 #endif
635 1568
636#if HAVE_MMAP 1569#if HAVE_MMAP
1570 if (cctx->flags & CC_MAPPED)
637 munmap (cctx->sptr, cctx->ssize); 1571 munmap (cctx->sptr, cctx->ssize);
638#else 1572 else
1573#endif
639 Safefree (cctx->sptr); 1574 Safefree (cctx->sptr);
640#endif 1575 }
641 1576
642 Safefree (cctx); 1577 Safefree (cctx);
643} 1578}
644 1579
1580/* wether this cctx should be destructed */
1581#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1582
645static coro_cctx * 1583static coro_cctx *
646cctx_get () 1584cctx_get (pTHX)
647{ 1585{
648 coro_cctx *cctx; 1586 while (ecb_expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1587 {
652 cctx = cctx_first; 1588 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1589 cctx_first = cctx->next;
654 --cctx_idle; 1590 --cctx_idle;
655 } 1591
656 else 1592 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
657 { 1593 return cctx;
658 cctx = cctx_new (); 1594
659 PL_op = PL_op->op_next; 1595 cctx_destroy (cctx);
660 } 1596 }
661 1597
662 return cctx; 1598 return cctx_new_run ();
663} 1599}
664 1600
665static void 1601static void
666cctx_put (coro_cctx *cctx) 1602cctx_put (coro_cctx *cctx)
667{ 1603{
1604 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1605
668 /* free another cctx if overlimit */ 1606 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1607 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
670 { 1608 {
671 coro_cctx *first = cctx_first; 1609 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1610 cctx_first = first->next;
673 --cctx_idle; 1611 --cctx_idle;
674 1612
675 assert (!first->inuse);
676 cctx_destroy (first); 1613 cctx_destroy (first);
677 } 1614 }
678 1615
679 ++cctx_idle; 1616 ++cctx_idle;
680 cctx->next = cctx_first; 1617 cctx->next = cctx_first;
681 cctx_first = cctx; 1618 cctx_first = cctx;
682} 1619}
683 1620
684/* never call directly, always through the coro_state_transfer global variable */ 1621/** coroutine switching *****************************************************/
685static void NOINLINE 1622
1623static void
1624transfer_check (pTHX_ struct coro *prev, struct coro *next)
1625{
1626 /* TODO: throwing up here is considered harmful */
1627
1628 if (ecb_expect_true (prev != next))
1629 {
1630 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1631 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1632
1633 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1634 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1635
1636#if !PERL_VERSION_ATLEAST (5,10,0)
1637 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1638 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1639#endif
1640 }
1641}
1642
1643/* always use the TRANSFER macro */
1644static void ecb_noinline /* noinline so we have a fixed stackframe */
686transfer (struct coro *prev, struct coro *next, int flags) 1645transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1646{
688 dSTACKLEVEL; 1647 dSTACKLEVEL;
689 1648
690 /* sometimes transfer is only called to set idle_sp */ 1649 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1650 if (ecb_expect_false (!prev))
1651 {
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1652 cctx_current->idle_sp = STACKLEVEL;
693 else if (prev != next) 1653 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
694 { 1654 }
1655 else if (ecb_expect_true (prev != next))
1656 {
695 coro_cctx *prev__cctx; 1657 coro_cctx *cctx_prev;
696 1658
697 if (prev->flags & CF_NEW) 1659 if (ecb_expect_false (prev->flags & CF_NEW))
698 { 1660 {
699 /* create a new empty context */ 1661 /* create a new empty/source context */
700 Newz (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW; 1662 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1663 prev->flags |= CF_RUNNING;
704 } 1664 }
705 1665
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1666 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1667 next->flags |= CF_RUNNING;
715 1668
716 LOCK; 1669 /* first get rid of the old state */
1670 save_perl (aTHX_ prev);
717 1671
718 if (next->flags & CF_NEW) 1672 if (ecb_expect_false (next->flags & CF_NEW))
719 { 1673 {
720 /* need to start coroutine */ 1674 /* need to start coroutine */
721 next->flags &= ~CF_NEW; 1675 next->flags &= ~CF_NEW;
722 /* first get rid of the old state */
723 SAVE (prev, -1);
724 /* setup coroutine call */ 1676 /* setup coroutine call */
725 setup_coro (next); 1677 init_perl (aTHX_ next);
726 /* need a new stack */
727 assert (!next->stack);
728 } 1678 }
729 else 1679 else
1680 load_perl (aTHX_ next);
1681
1682 /* possibly untie and reuse the cctx */
1683 if (ecb_expect_true (
1684 cctx_current->idle_sp == STACKLEVEL
1685 && !(cctx_current->flags & CC_TRACE)
1686 && !force_cctx
1687 ))
730 { 1688 {
731 /* coroutine already started */ 1689 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
732 SAVE (prev, flags); 1690 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
733 LOAD (next); 1691
1692 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1693 /* without this the next cctx_get might destroy the running cctx while still in use */
1694 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1695 if (ecb_expect_true (!next->cctx))
1696 next->cctx = cctx_get (aTHX);
1697
1698 cctx_put (cctx_current);
734 } 1699 }
1700 else
1701 prev->cctx = cctx_current;
735 1702
736 prev__cctx = prev->cctx; 1703 ++next->usecount;
737 1704
738 /* possibly "free" the cctx */ 1705 cctx_prev = cctx_current;
739 if (prev__cctx->idle_sp == STACKLEVEL && 0) 1706 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1707
1708 next->cctx = 0;
1709
1710 if (ecb_expect_false (cctx_prev != cctx_current))
740 { 1711 {
741 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1712 cctx_prev->top_env = PL_top_env;
742 assert (PL_top_env == prev__cctx->top_env); 1713 PL_top_env = cctx_current->top_env;
743 1714 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
744 prev->cctx = 0;
745
746 cctx_put (prev__cctx);
747 prev__cctx->inuse = 0;
748 } 1715 }
749 1716
750 if (!next->cctx) 1717 transfer_tail (aTHX);
751 {
752 next->cctx = cctx_get ();
753 assert (!next->cctx->inuse);
754 next->cctx->inuse = 1;
755 }
756
757 if (prev__cctx != next->cctx)
758 {
759 prev__cctx->top_env = PL_top_env;
760 PL_top_env = next->cctx->top_env;
761 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762 }
763
764 free_coro_mortal ();
765
766 UNLOCK;
767 } 1718 }
768} 1719}
769 1720
770struct transfer_args 1721#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
771{
772 struct coro *prev, *next;
773 int flags;
774};
775
776#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1722#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777 1723
1724/** high level stuff ********************************************************/
1725
1726/* this function is actually Coro, not Coro::State, but we call it from here */
1727/* because it is convenient - but it hasn't been declared yet for that reason */
778static void 1728static void
1729coro_call_on_destroy (pTHX_ struct coro *coro);
1730
1731static void
779coro_state_destroy (struct coro *coro) 1732coro_state_destroy (pTHX_ struct coro *coro)
780{ 1733{
781 if (coro->refcnt--) 1734 if (coro->flags & CF_ZOMBIE)
782 return; 1735 return;
783 1736
784 if (coro->mainstack && coro->mainstack != main_mainstack) 1737 slf_destroy (aTHX_ coro);
785 {
786 struct coro temp;
787 1738
1739 coro->flags |= CF_ZOMBIE;
1740
788 if (coro->flags & CF_RUNNING) 1741 if (coro->flags & CF_READY)
789 croak ("FATAL: tried to destroy currently running coroutine");
790
791 SAVE ((&temp), TRANSFER_SAVE_ALL);
792 LOAD (coro);
793
794 coro_destroy_stacks ();
795
796 LOAD ((&temp)); /* this will get rid of defsv etc.. */
797
798 coro->mainstack = 0;
799 } 1742 {
1743 /* reduce nready, as destroying a ready coro effectively unreadies it */
1744 /* alternative: look through all ready queues and remove the coro */
1745 --coro_nready;
1746 }
1747 else
1748 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1749
1750 if (coro->next) coro->next->prev = coro->prev;
1751 if (coro->prev) coro->prev->next = coro->next;
1752 if (coro == coro_first) coro_first = coro->next;
1753
1754 if (coro->mainstack
1755 && coro->mainstack != main_mainstack
1756 && coro->slot
1757 && !PL_dirty)
1758 destroy_perl (aTHX_ coro);
800 1759
801 cctx_destroy (coro->cctx); 1760 cctx_destroy (coro->cctx);
1761 SvREFCNT_dec (coro->startcv);
802 SvREFCNT_dec (coro->args); 1762 SvREFCNT_dec (coro->args);
803 Safefree (coro); 1763 SvREFCNT_dec (coro->swap_sv);
1764 SvREFCNT_dec (CORO_THROW);
1765
1766 coro_call_on_destroy (aTHX_ coro);
1767
1768 /* more destruction mayhem in coro_state_free */
804} 1769}
805 1770
806static int 1771static int
807coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1772coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808{ 1773{
809 struct coro *coro = (struct coro *)mg->mg_ptr; 1774 struct coro *coro = (struct coro *)mg->mg_ptr;
810 mg->mg_ptr = 0; 1775 mg->mg_ptr = 0;
811 1776
812 coro_state_destroy (coro); 1777 coro_state_destroy (aTHX_ coro);
1778 SvREFCNT_dec (coro->on_destroy);
1779 SvREFCNT_dec (coro->status);
1780
1781 Safefree (coro);
813 1782
814 return 0; 1783 return 0;
815} 1784}
816 1785
817static int 1786static int ecb_cold
818coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1787coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
819{ 1788{
820 struct coro *coro = (struct coro *)mg->mg_ptr; 1789 /* called when perl clones the current process the slow way (windows process emulation) */
821 1790 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
822 ++coro->refcnt; 1791 mg->mg_ptr = 0;
1792 mg->mg_virtual = 0;
823 1793
824 return 0; 1794 return 0;
825} 1795}
826 1796
827static MGVTBL coro_state_vtbl = { 1797static MGVTBL coro_state_vtbl = {
828 0, 0, 0, 0, 1798 0, 0, 0, 0,
829 coro_state_clear, 1799 coro_state_free,
830 0, 1800 0,
831#ifdef MGf_DUP 1801#ifdef MGf_DUP
832 coro_state_dup, 1802 coro_state_dup,
833#else 1803#else
834# define MGf_DUP 0 1804# define MGf_DUP 0
835#endif 1805#endif
836}; 1806};
837 1807
838static struct coro *
839SvSTATE (SV *coro)
840{
841 HV *stash;
842 MAGIC *mg;
843
844 if (SvROK (coro))
845 coro = SvRV (coro);
846
847 stash = SvSTASH (coro);
848 if (stash != coro_stash && stash != coro_state_stash)
849 {
850 /* very slow, but rare, check */
851 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852 croak ("Coro::State object required");
853 }
854
855 mg = SvMAGIC (coro);
856 assert (mg->mg_type == PERL_MAGIC_ext);
857 return (struct coro *)mg->mg_ptr;
858}
859
860static void 1808static void
861prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1809prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
862{ 1810{
863 ta->prev = SvSTATE (prev); 1811 ta->prev = SvSTATE (prev_sv);
864 ta->next = SvSTATE (next); 1812 ta->next = SvSTATE (next_sv);
865 ta->flags = flags; 1813 TRANSFER_CHECK (*ta);
866} 1814}
867 1815
868static void 1816static void
869api_transfer (SV *prev, SV *next, int flags) 1817api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
870{ 1818{
871 struct transfer_args ta; 1819 struct coro_transfer_args ta;
872 1820
873 prepare_transfer (&ta, prev, next, flags); 1821 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874 TRANSFER (ta); 1822 TRANSFER (ta, 1);
875} 1823}
876 1824
877/** Coro ********************************************************************/ 1825/** Coro ********************************************************************/
878 1826
879#define PRIO_MAX 3 1827ecb_inline void
880#define PRIO_HIGH 1 1828coro_enq (pTHX_ struct coro *coro)
881#define PRIO_NORMAL 0
882#define PRIO_LOW -1
883#define PRIO_IDLE -3
884#define PRIO_MIN -4
885
886/* for Coro.pm */
887static SV *coro_current;
888static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889static int coro_nready;
890
891static void
892coro_enq (SV *coro_sv)
893{ 1829{
894 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1830 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
895 coro_nready++;
896}
897 1831
898static SV * 1832 SvREFCNT_inc_NN (coro->hv);
899coro_deq (int min_prio)
900{
901 int prio = PRIO_MAX - PRIO_MIN;
902 1833
903 min_prio -= PRIO_MIN; 1834 coro->next_ready = 0;
904 if (min_prio < 0) 1835 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
905 min_prio = 0; 1836 ready [1] = coro;
1837}
906 1838
1839ecb_inline struct coro *
1840coro_deq (pTHX)
1841{
1842 int prio;
1843
907 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1844 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
908 if (AvFILLp (coro_ready [prio]) >= 0) 1845 {
1846 struct coro **ready = coro_ready [prio];
1847
1848 if (ready [0])
909 { 1849 {
910 coro_nready--; 1850 struct coro *coro = ready [0];
911 return av_shift (coro_ready [prio]); 1851 ready [0] = coro->next_ready;
1852 return coro;
912 } 1853 }
1854 }
913 1855
914 return 0; 1856 return 0;
915} 1857}
916 1858
1859static void
1860invoke_sv_ready_hook_helper (void)
1861{
1862 dTHX;
1863 dSP;
1864
1865 ENTER;
1866 SAVETMPS;
1867
1868 PUSHMARK (SP);
1869 PUTBACK;
1870 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1871
1872 FREETMPS;
1873 LEAVE;
1874}
1875
917static int 1876static int
918api_ready (SV *coro_sv) 1877api_ready (pTHX_ SV *coro_sv)
919{ 1878{
920 struct coro *coro;
921
922 if (SvROK (coro_sv))
923 coro_sv = SvRV (coro_sv);
924
925 coro = SvSTATE (coro_sv); 1879 struct coro *coro = SvSTATE (coro_sv);
926 1880
927 if (coro->flags & CF_READY) 1881 if (coro->flags & CF_READY)
928 return 0; 1882 return 0;
929 1883
930#if 0 /* this is actually harmless */ 1884 coro->flags |= CF_READY;
1885
1886 coro_enq (aTHX_ coro);
1887
1888 if (!coro_nready++)
1889 if (coroapi.readyhook)
1890 coroapi.readyhook ();
1891
1892 return 1;
1893}
1894
1895static int
1896api_is_ready (pTHX_ SV *coro_sv)
1897{
1898 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1899}
1900
1901/* expects to own a reference to next->hv */
1902ecb_inline void
1903prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1904{
1905 SV *prev_sv = SvRV (coro_current);
1906
1907 ta->prev = SvSTATE_hv (prev_sv);
1908 ta->next = next;
1909
1910 TRANSFER_CHECK (*ta);
1911
1912 SvRV_set (coro_current, (SV *)next->hv);
1913
1914 free_coro_mortal (aTHX);
1915 coro_mortal = prev_sv;
1916}
1917
1918static void
1919prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1920{
1921 for (;;)
1922 {
1923 struct coro *next = coro_deq (aTHX);
1924
1925 if (ecb_expect_true (next))
1926 {
1927 /* cannot transfer to destroyed coros, skip and look for next */
1928 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1929 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1930 else
1931 {
1932 next->flags &= ~CF_READY;
1933 --coro_nready;
1934
1935 prepare_schedule_to (aTHX_ ta, next);
1936 break;
1937 }
1938 }
1939 else
1940 {
1941 /* nothing to schedule: call the idle handler */
1942 if (SvROK (sv_idle)
1943 && SvOBJECT (SvRV (sv_idle)))
1944 {
1945 if (SvRV (sv_idle) == SvRV (coro_current))
1946 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1947
1948 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1949 api_ready (aTHX_ SvRV (sv_idle));
1950 --coro_nready;
1951 }
1952 else
1953 {
1954 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1955 dSP;
1956
1957 ENTER;
1958 SAVETMPS;
1959
1960 PUSHMARK (SP);
1961 PUTBACK;
1962 call_sv (sv_idle, G_VOID | G_DISCARD);
1963
1964 FREETMPS;
1965 LEAVE;
1966 }
1967 }
1968 }
1969}
1970
1971ecb_inline void
1972prepare_cede (pTHX_ struct coro_transfer_args *ta)
1973{
1974 api_ready (aTHX_ coro_current);
1975 prepare_schedule (aTHX_ ta);
1976}
1977
1978ecb_inline void
1979prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1980{
1981 SV *prev = SvRV (coro_current);
1982
1983 if (coro_nready)
1984 {
1985 prepare_schedule (aTHX_ ta);
1986 api_ready (aTHX_ prev);
1987 }
1988 else
1989 prepare_nop (aTHX_ ta);
1990}
1991
1992static void
1993api_schedule (pTHX)
1994{
1995 struct coro_transfer_args ta;
1996
1997 prepare_schedule (aTHX_ &ta);
1998 TRANSFER (ta, 1);
1999}
2000
2001static void
2002api_schedule_to (pTHX_ SV *coro_sv)
2003{
2004 struct coro_transfer_args ta;
2005 struct coro *next = SvSTATE (coro_sv);
2006
2007 SvREFCNT_inc_NN (coro_sv);
2008 prepare_schedule_to (aTHX_ &ta, next);
2009}
2010
2011static int
2012api_cede (pTHX)
2013{
2014 struct coro_transfer_args ta;
2015
2016 prepare_cede (aTHX_ &ta);
2017
2018 if (ecb_expect_true (ta.prev != ta.next))
2019 {
2020 TRANSFER (ta, 1);
2021 return 1;
2022 }
2023 else
2024 return 0;
2025}
2026
2027static int
2028api_cede_notself (pTHX)
2029{
2030 if (coro_nready)
2031 {
2032 struct coro_transfer_args ta;
2033
2034 prepare_cede_notself (aTHX_ &ta);
2035 TRANSFER (ta, 1);
2036 return 1;
2037 }
2038 else
2039 return 0;
2040}
2041
2042static void
2043api_trace (pTHX_ SV *coro_sv, int flags)
2044{
2045 struct coro *coro = SvSTATE (coro_sv);
2046
931 if (coro->flags & CF_RUNNING) 2047 if (coro->flags & CF_RUNNING)
932 croak ("Coro::ready called on currently running coroutine"); 2048 croak ("cannot enable tracing on a running coroutine, caught");
933#endif
934 2049
935 coro->flags |= CF_READY; 2050 if (flags & CC_TRACE)
2051 {
2052 if (!coro->cctx)
2053 coro->cctx = cctx_new_run ();
2054 else if (!(coro->cctx->flags & CC_TRACE))
2055 croak ("cannot enable tracing on coroutine with custom stack, caught");
936 2056
937 LOCK; 2057 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
938 coro_enq (SvREFCNT_inc (coro_sv)); 2058 }
939 UNLOCK; 2059 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2060 {
2061 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2062
2063 if (coro->flags & CF_RUNNING)
2064 PL_runops = RUNOPS_DEFAULT;
2065 else
2066 coro->slot->runops = RUNOPS_DEFAULT;
2067 }
2068}
2069
2070static void
2071coro_push_av (pTHX_ AV *av, I32 gimme_v)
2072{
2073 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2074 {
2075 dSP;
2076
2077 if (gimme_v == G_SCALAR)
2078 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2079 else
2080 {
2081 int i;
2082 EXTEND (SP, AvFILLp (av) + 1);
2083
2084 for (i = 0; i <= AvFILLp (av); ++i)
2085 PUSHs (AvARRAY (av)[i]);
2086 }
2087
2088 PUTBACK;
2089 }
2090}
2091
2092static void
2093coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2094{
2095 if (!coro->on_destroy)
2096 coro->on_destroy = newAV ();
2097
2098 av_push (coro->on_destroy, cb);
2099}
2100
2101static void
2102slf_destroy_join (pTHX_ struct CoroSLF *frame)
2103{
2104 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2105}
2106
2107static int
2108slf_check_join (pTHX_ struct CoroSLF *frame)
2109{
2110 struct coro *coro = (struct coro *)frame->data;
2111
2112 if (!coro->status)
2113 return 1;
2114
2115 frame->destroy = 0;
2116
2117 coro_push_av (aTHX_ coro->status, GIMME_V);
2118
2119 SvREFCNT_dec ((SV *)coro->hv);
2120
2121 return 0;
2122}
2123
2124static void
2125slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2126{
2127 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2128
2129 if (items > 1)
2130 croak ("join called with too many arguments");
2131
2132 if (coro->status)
2133 frame->prepare = prepare_nop;
2134 else
2135 {
2136 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2137 frame->prepare = prepare_schedule;
2138 }
2139
2140 frame->check = slf_check_join;
2141 frame->destroy = slf_destroy_join;
2142 frame->data = (void *)coro;
2143 SvREFCNT_inc (coro->hv);
2144}
2145
2146static void
2147coro_call_on_destroy (pTHX_ struct coro *coro)
2148{
2149 AV *od = coro->on_destroy;
2150
2151 if (!od)
2152 return;
2153
2154 while (AvFILLp (od) >= 0)
2155 {
2156 SV *cb = sv_2mortal (av_pop (od));
2157
2158 /* coro hv's (and only hv's at the moment) are supported as well */
2159 if (SvSTATEhv_p (aTHX_ cb))
2160 api_ready (aTHX_ cb);
2161 else
2162 {
2163 dSP; /* don't disturb outer sp */
2164 PUSHMARK (SP);
2165
2166 if (coro->status)
2167 {
2168 PUTBACK;
2169 coro_push_av (aTHX_ coro->status, G_ARRAY);
2170 SPAGAIN;
2171 }
2172
2173 PUTBACK;
2174 call_sv (cb, G_VOID | G_DISCARD);
2175 }
2176 }
2177}
2178
2179static void
2180coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2181{
2182 AV *av;
2183
2184 if (coro->status)
2185 {
2186 av = coro->status;
2187 av_clear (av);
2188 }
2189 else
2190 av = coro->status = newAV ();
2191
2192 /* items are actually not so common, so optimise for this case */
2193 if (items)
2194 {
2195 int i;
2196
2197 av_extend (av, items - 1);
2198
2199 for (i = 0; i < items; ++i)
2200 av_push (av, SvREFCNT_inc_NN (arg [i]));
2201 }
2202}
2203
2204static void
2205slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2206{
2207 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2208 api_ready (aTHX_ sv_manager);
2209
2210 frame->prepare = prepare_schedule;
2211 frame->check = slf_check_repeat;
2212
2213 /* as a minor optimisation, we could unwind all stacks here */
2214 /* but that puts extra pressure on pp_slf, and is not worth much */
2215 /*coro_unwind_stacks (aTHX);*/
2216}
2217
2218static void
2219slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2220{
2221 HV *coro_hv = (HV *)SvRV (coro_current);
2222
2223 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2224 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2225}
2226
2227static void
2228slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2229{
2230 HV *coro_hv;
2231 struct coro *coro;
2232
2233 if (items <= 0)
2234 croak ("Coro::cancel called without coro object,");
2235
2236 coro = SvSTATE (arg [0]);
2237 coro_hv = coro->hv;
2238
2239 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2240
2241 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2242 {
2243 /* coro currently busy cancelling something, so just notify it */
2244 coro->slf_frame.data = (void *)coro;
2245
2246 frame->prepare = prepare_nop;
2247 frame->check = slf_check_nop;
2248 }
2249 else if (coro_hv == (HV *)SvRV (coro_current))
2250 {
2251 /* cancelling the current coro is allowed, and equals terminate */
2252 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2253 }
2254 else
2255 {
2256 struct coro *self = SvSTATE_current;
2257
2258 /* otherwise we cancel directly, purely for speed reasons
2259 * unfortunately, this requires some magic trickery, as
2260 * somebody else could cancel us, so we have to fight the cancellation.
2261 * this is ugly, and hopefully fully worth the extra speed.
2262 * besides, I can't get the slow-but-safe version working...
2263 */
2264 slf_frame.data = 0;
2265 self->flags |= CF_NOCANCEL;
2266 coro_state_destroy (aTHX_ coro);
2267 self->flags &= ~CF_NOCANCEL;
2268
2269 if (slf_frame.data)
2270 {
2271 /* while we were busy we have been cancelled, so terminate */
2272 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2273 }
2274 else
2275 {
2276 frame->prepare = prepare_nop;
2277 frame->check = slf_check_nop;
2278 }
2279 }
2280}
2281
2282static int
2283slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2284{
2285 frame->prepare = 0;
2286 coro_unwind_stacks (aTHX);
2287
2288 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
940 2289
941 return 1; 2290 return 1;
942} 2291}
943 2292
944static int 2293static int
945api_is_ready (SV *coro_sv) 2294safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
946{ 2295{
947 return !!SvSTATE (coro_sv)->flags & CF_READY; 2296 if (coro->cctx)
948} 2297 croak ("coro inside C callback, unable to cancel at this time, caught");
949 2298
950static void 2299 if (coro->flags & CF_NEW)
951prepare_schedule (struct transfer_args *ta) 2300 {
952{ 2301 coro_set_status (aTHX_ coro, arg, items);
953 SV *prev, *next; 2302 coro_state_destroy (aTHX_ coro);
954
955 for (;;)
956 { 2303 }
957 LOCK; 2304 else
958 next = coro_deq (PRIO_MIN); 2305 {
959 UNLOCK; 2306 if (!coro->slf_frame.prepare)
2307 croak ("coro outside an SLF function, unable to cancel at this time, caught");
960 2308
961 if (next) 2309 slf_destroy (aTHX_ coro);
962 break; 2310
2311 coro_set_status (aTHX_ coro, arg, items);
2312 coro->slf_frame.prepare = prepare_nop;
2313 coro->slf_frame.check = slf_check_safe_cancel;
2314
2315 api_ready (aTHX_ (SV *)coro->hv);
2316 }
2317
2318 return 1;
2319}
2320
2321/*****************************************************************************/
2322/* async pool handler */
2323
2324static int
2325slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2326{
2327 HV *hv = (HV *)SvRV (coro_current);
2328 struct coro *coro = (struct coro *)frame->data;
2329
2330 if (!coro->invoke_cb)
2331 return 1; /* loop till we have invoke */
2332 else
2333 {
2334 hv_store (hv, "desc", sizeof ("desc") - 1,
2335 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2336
2337 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
963 2338
964 { 2339 {
965 dSP; 2340 dSP;
966 2341 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
967 ENTER;
968 SAVETMPS;
969
970 PUSHMARK (SP);
971 PUTBACK; 2342 PUTBACK;
972 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974 FREETMPS;
975 LEAVE;
976 } 2343 }
2344
2345 SvREFCNT_dec (GvAV (PL_defgv));
2346 GvAV (PL_defgv) = coro->invoke_av;
2347 coro->invoke_av = 0;
2348
2349 return 0;
2350 }
2351}
2352
2353static void
2354slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2355{
2356 HV *hv = (HV *)SvRV (coro_current);
2357 struct coro *coro = SvSTATE_hv ((SV *)hv);
2358
2359 if (ecb_expect_true (coro->saved_deffh))
977 } 2360 {
2361 /* subsequent iteration */
2362 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2363 coro->saved_deffh = 0;
978 2364
2365 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2366 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2367 {
2368 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2369 return;
2370 }
2371 else
2372 {
2373 av_clear (GvAV (PL_defgv));
2374 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2375
2376 coro->prio = 0;
2377
2378 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2379 api_trace (aTHX_ coro_current, 0);
2380
2381 frame->prepare = prepare_schedule;
2382 av_push (av_async_pool, SvREFCNT_inc (hv));
2383 }
2384 }
2385 else
2386 {
2387 /* first iteration, simply fall through */
2388 frame->prepare = prepare_nop;
2389 }
2390
2391 frame->check = slf_check_pool_handler;
2392 frame->data = (void *)coro;
2393}
2394
2395/*****************************************************************************/
2396/* rouse callback */
2397
2398#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2399
2400static void
2401coro_rouse_callback (pTHX_ CV *cv)
2402{
2403 dXSARGS;
2404 SV *data = (SV *)S_GENSUB_ARG;
2405
2406 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2407 {
2408 /* first call, set args */
2409 SV *coro = SvRV (data);
2410 AV *av = newAV ();
2411
2412 SvRV_set (data, (SV *)av);
2413
2414 /* better take a full copy of the arguments */
2415 while (items--)
2416 av_store (av, items, newSVsv (ST (items)));
2417
2418 api_ready (aTHX_ coro);
2419 SvREFCNT_dec (coro);
2420 }
2421
2422 XSRETURN_EMPTY;
2423}
2424
2425static int
2426slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2427{
2428 SV *data = (SV *)frame->data;
2429
2430 if (CORO_THROW)
2431 return 0;
2432
2433 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2434 return 1;
2435
2436 /* now push all results on the stack */
2437 {
2438 dSP;
2439 AV *av = (AV *)SvRV (data);
2440 int i;
2441
2442 EXTEND (SP, AvFILLp (av) + 1);
2443 for (i = 0; i <= AvFILLp (av); ++i)
2444 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2445
2446 /* we have stolen the elements, so set length to zero and free */
2447 AvFILLp (av) = -1;
2448 av_undef (av);
2449
2450 PUTBACK;
2451 }
2452
2453 return 0;
2454}
2455
2456static void
2457slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2458{
2459 SV *cb;
2460
2461 if (items)
2462 cb = arg [0];
2463 else
2464 {
2465 struct coro *coro = SvSTATE_current;
2466
2467 if (!coro->rouse_cb)
2468 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2469
2470 cb = sv_2mortal (coro->rouse_cb);
2471 coro->rouse_cb = 0;
2472 }
2473
2474 if (!SvROK (cb)
2475 || SvTYPE (SvRV (cb)) != SVt_PVCV
2476 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2477 croak ("Coro::rouse_wait called with illegal callback argument,");
2478
2479 {
2480 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2481 SV *data = (SV *)S_GENSUB_ARG;
2482
2483 frame->data = (void *)data;
2484 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2485 frame->check = slf_check_rouse_wait;
2486 }
2487}
2488
2489static SV *
2490coro_new_rouse_cb (pTHX)
2491{
979 prev = SvRV (coro_current); 2492 HV *hv = (HV *)SvRV (coro_current);
980 SvRV_set (coro_current, next); 2493 struct coro *coro = SvSTATE_hv (hv);
2494 SV *data = newRV_inc ((SV *)hv);
2495 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
981 2496
982 /* free this only after the transfer */ 2497 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
983 LOCK; 2498 SvREFCNT_dec (data); /* magicext increases the refcount */
984 free_coro_mortal ();
985 UNLOCK;
986 coro_mortal = prev;
987 2499
988 assert (!SvROK(prev));//D 2500 SvREFCNT_dec (coro->rouse_cb);
989 assert (!SvROK(next));//D 2501 coro->rouse_cb = SvREFCNT_inc_NN (cb);
990 2502
991 ta->prev = SvSTATE (prev); 2503 return cb;
992 ta->next = SvSTATE (next);
993 ta->flags = TRANSFER_SAVE_ALL;
994
995 assert (ta->flags & CF_READY);
996 ta->next->flags &= ~CF_READY;
997} 2504}
998 2505
2506/*****************************************************************************/
2507/* schedule-like-function opcode (SLF) */
2508
2509static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2510static const CV *slf_cv;
2511static SV **slf_argv;
2512static int slf_argc, slf_arga; /* count, allocated */
2513static I32 slf_ax; /* top of stack, for restore */
2514
2515/* this restores the stack in the case we patched the entersub, to */
2516/* recreate the stack frame as perl will on following calls */
2517/* since entersub cleared the stack */
2518static OP *
2519pp_restore (pTHX)
2520{
2521 int i;
2522 SV **SP = PL_stack_base + slf_ax;
2523
2524 PUSHMARK (SP);
2525
2526 EXTEND (SP, slf_argc + 1);
2527
2528 for (i = 0; i < slf_argc; ++i)
2529 PUSHs (sv_2mortal (slf_argv [i]));
2530
2531 PUSHs ((SV *)CvGV (slf_cv));
2532
2533 RETURNOP (slf_restore.op_first);
2534}
2535
999static void 2536static void
2537slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2538{
2539 SV **arg = (SV **)slf_frame.data;
2540
2541 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2542}
2543
2544static void
2545slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 if (items != 2)
2548 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2549
2550 frame->prepare = slf_prepare_transfer;
2551 frame->check = slf_check_nop;
2552 frame->data = (void *)arg; /* let's hope it will stay valid */
2553}
2554
2555static void
2556slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 frame->prepare = prepare_schedule;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
1000prepare_cede (struct transfer_args *ta) 2563slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1001{ 2564{
2565 struct coro *next = (struct coro *)slf_frame.data;
2566
2567 SvREFCNT_inc_NN (next->hv);
2568 prepare_schedule_to (aTHX_ ta, next);
2569}
2570
2571static void
2572slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 if (!items)
2575 croak ("Coro::schedule_to expects a coroutine argument, caught");
2576
2577 frame->data = (void *)SvSTATE (arg [0]);
2578 frame->prepare = slf_prepare_schedule_to;
2579 frame->check = slf_check_nop;
2580}
2581
2582static void
2583slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2584{
1002 api_ready (coro_current); 2585 api_ready (aTHX_ SvRV (coro_current));
1003 2586
1004 prepare_schedule (ta); 2587 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1005} 2588}
1006 2589
1007static void 2590static void
1008api_schedule (void) 2591slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1009{ 2592{
2593 frame->prepare = prepare_cede;
2594 frame->check = slf_check_nop;
2595}
2596
2597static void
2598slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 frame->prepare = prepare_cede_notself;
2601 frame->check = slf_check_nop;
2602}
2603
2604/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2605static void
2606slf_destroy (pTHX_ struct coro *coro)
2607{
2608 /* this callback is reserved for slf functions needing to do cleanup */
2609 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2610 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2611
2612 /*
2613 * The on_destroy above most likely is from an SLF call.
2614 * Since by definition the SLF call will not finish when we destroy
2615 * the coro, we will have to force-finish it here, otherwise
2616 * cleanup functions cannot call SLF functions.
2617 */
2618 coro->slf_frame.prepare = 0;
2619}
2620
2621/*
2622 * these not obviously related functions are all rolled into one
2623 * function to increase chances that they all will call transfer with the same
2624 * stack offset
2625 * SLF stands for "schedule-like-function".
2626 */
2627static OP *
2628pp_slf (pTHX)
2629{
2630 I32 checkmark; /* mark SP to see how many elements check has pushed */
2631
2632 /* set up the slf frame, unless it has already been set-up */
2633 /* the latter happens when a new coro has been started */
2634 /* or when a new cctx was attached to an existing coroutine */
2635 if (ecb_expect_true (!slf_frame.prepare))
2636 {
2637 /* first iteration */
2638 dSP;
2639 SV **arg = PL_stack_base + TOPMARK + 1;
2640 int items = SP - arg; /* args without function object */
2641 SV *gv = *sp;
2642
2643 /* do a quick consistency check on the "function" object, and if it isn't */
2644 /* for us, divert to the real entersub */
2645 if (SvTYPE (gv) != SVt_PVGV
2646 || !GvCV (gv)
2647 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2648 return PL_ppaddr[OP_ENTERSUB](aTHX);
2649
2650 if (!(PL_op->op_flags & OPf_STACKED))
2651 {
2652 /* ampersand-form of call, use @_ instead of stack */
2653 AV *av = GvAV (PL_defgv);
2654 arg = AvARRAY (av);
2655 items = AvFILLp (av) + 1;
2656 }
2657
2658 /* now call the init function, which needs to set up slf_frame */
2659 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2660 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2661
2662 /* pop args */
2663 SP = PL_stack_base + POPMARK;
2664
2665 PUTBACK;
2666 }
2667
2668 /* now that we have a slf_frame, interpret it! */
2669 /* we use a callback system not to make the code needlessly */
2670 /* complicated, but so we can run multiple perl coros from one cctx */
2671
2672 do
2673 {
1010 struct transfer_args ta; 2674 struct coro_transfer_args ta;
1011 2675
1012 prepare_schedule (&ta); 2676 slf_frame.prepare (aTHX_ &ta);
1013 TRANSFER (ta); 2677 TRANSFER (ta, 0);
1014}
1015 2678
2679 checkmark = PL_stack_sp - PL_stack_base;
2680 }
2681 while (slf_frame.check (aTHX_ &slf_frame));
2682
2683 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2684
2685 /* exception handling */
2686 if (ecb_expect_false (CORO_THROW))
2687 {
2688 SV *exception = sv_2mortal (CORO_THROW);
2689
2690 CORO_THROW = 0;
2691 sv_setsv (ERRSV, exception);
2692 croak (0);
2693 }
2694
2695 /* return value handling - mostly like entersub */
2696 /* make sure we put something on the stack in scalar context */
2697 if (GIMME_V == G_SCALAR
2698 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2699 {
2700 dSP;
2701 SV **bot = PL_stack_base + checkmark;
2702
2703 if (sp == bot) /* too few, push undef */
2704 bot [1] = &PL_sv_undef;
2705 else /* too many, take last one */
2706 bot [1] = *sp;
2707
2708 SP = bot + 1;
2709
2710 PUTBACK;
2711 }
2712
2713 return NORMAL;
2714}
2715
2716static void
2717api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2718{
2719 int i;
2720 SV **arg = PL_stack_base + ax;
2721 int items = PL_stack_sp - arg + 1;
2722
2723 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2724
2725 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2726 && PL_op->op_ppaddr != pp_slf)
2727 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2728
2729 CvFLAGS (cv) |= CVf_SLF;
2730 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2731 slf_cv = cv;
2732
2733 /* we patch the op, and then re-run the whole call */
2734 /* we have to put the same argument on the stack for this to work */
2735 /* and this will be done by pp_restore */
2736 slf_restore.op_next = (OP *)&slf_restore;
2737 slf_restore.op_type = OP_CUSTOM;
2738 slf_restore.op_ppaddr = pp_restore;
2739 slf_restore.op_first = PL_op;
2740
2741 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2742
2743 if (PL_op->op_flags & OPf_STACKED)
2744 {
2745 if (items > slf_arga)
2746 {
2747 slf_arga = items;
2748 Safefree (slf_argv);
2749 New (0, slf_argv, slf_arga, SV *);
2750 }
2751
2752 slf_argc = items;
2753
2754 for (i = 0; i < items; ++i)
2755 slf_argv [i] = SvREFCNT_inc (arg [i]);
2756 }
2757 else
2758 slf_argc = 0;
2759
2760 PL_op->op_ppaddr = pp_slf;
2761 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2762
2763 PL_op = (OP *)&slf_restore;
2764}
2765
2766/*****************************************************************************/
2767/* dynamic wind */
2768
2769static void
2770on_enterleave_call (pTHX_ SV *cb)
2771{
2772 dSP;
2773
2774 PUSHSTACK;
2775
2776 PUSHMARK (SP);
2777 PUTBACK;
2778 call_sv (cb, G_VOID | G_DISCARD);
2779 SPAGAIN;
2780
2781 POPSTACK;
2782}
2783
2784static SV *
2785coro_avp_pop_and_free (pTHX_ AV **avp)
2786{
2787 AV *av = *avp;
2788 SV *res = av_pop (av);
2789
2790 if (AvFILLp (av) < 0)
2791 {
2792 *avp = 0;
2793 SvREFCNT_dec (av);
2794 }
2795
2796 return res;
2797}
2798
2799static void
2800coro_pop_on_enter (pTHX_ void *coro)
2801{
2802 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2803 SvREFCNT_dec (cb);
2804}
2805
2806static void
2807coro_pop_on_leave (pTHX_ void *coro)
2808{
2809 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2810 on_enterleave_call (aTHX_ sv_2mortal (cb));
2811}
2812
2813/*****************************************************************************/
2814/* PerlIO::cede */
2815
2816typedef struct
2817{
2818 PerlIOBuf base;
2819 NV next, every;
2820} PerlIOCede;
2821
2822static IV ecb_cold
2823PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2824{
2825 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2826
2827 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2828 self->next = nvtime () + self->every;
2829
2830 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2831}
2832
2833static SV * ecb_cold
2834PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2835{
2836 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2837
2838 return newSVnv (self->every);
2839}
2840
2841static IV
2842PerlIOCede_flush (pTHX_ PerlIO *f)
2843{
2844 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2845 double now = nvtime ();
2846
2847 if (now >= self->next)
2848 {
2849 api_cede (aTHX);
2850 self->next = now + self->every;
2851 }
2852
2853 return PerlIOBuf_flush (aTHX_ f);
2854}
2855
2856static PerlIO_funcs PerlIO_cede =
2857{
2858 sizeof(PerlIO_funcs),
2859 "cede",
2860 sizeof(PerlIOCede),
2861 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2862 PerlIOCede_pushed,
2863 PerlIOBuf_popped,
2864 PerlIOBuf_open,
2865 PerlIOBase_binmode,
2866 PerlIOCede_getarg,
2867 PerlIOBase_fileno,
2868 PerlIOBuf_dup,
2869 PerlIOBuf_read,
2870 PerlIOBuf_unread,
2871 PerlIOBuf_write,
2872 PerlIOBuf_seek,
2873 PerlIOBuf_tell,
2874 PerlIOBuf_close,
2875 PerlIOCede_flush,
2876 PerlIOBuf_fill,
2877 PerlIOBase_eof,
2878 PerlIOBase_error,
2879 PerlIOBase_clearerr,
2880 PerlIOBase_setlinebuf,
2881 PerlIOBuf_get_base,
2882 PerlIOBuf_bufsiz,
2883 PerlIOBuf_get_ptr,
2884 PerlIOBuf_get_cnt,
2885 PerlIOBuf_set_ptrcnt,
2886};
2887
2888/*****************************************************************************/
2889/* Coro::Semaphore & Coro::Signal */
2890
2891static SV *
2892coro_waitarray_new (pTHX_ int count)
2893{
2894 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2895 AV *av = newAV ();
2896 SV **ary;
2897
2898 /* unfortunately, building manually saves memory */
2899 Newx (ary, 2, SV *);
2900 AvALLOC (av) = ary;
2901#if PERL_VERSION_ATLEAST (5,10,0)
2902 AvARRAY (av) = ary;
2903#else
2904 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2905 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2906 SvPVX ((SV *)av) = (char *)ary;
2907#endif
2908 AvMAX (av) = 1;
2909 AvFILLp (av) = 0;
2910 ary [0] = newSViv (count);
2911
2912 return newRV_noinc ((SV *)av);
2913}
2914
2915/* semaphore */
2916
2917static void
2918coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2919{
2920 SV *count_sv = AvARRAY (av)[0];
2921 IV count = SvIVX (count_sv);
2922
2923 count += adjust;
2924 SvIVX (count_sv) = count;
2925
2926 /* now wake up as many waiters as are expected to lock */
2927 while (count > 0 && AvFILLp (av) > 0)
2928 {
2929 SV *cb;
2930
2931 /* swap first two elements so we can shift a waiter */
2932 AvARRAY (av)[0] = AvARRAY (av)[1];
2933 AvARRAY (av)[1] = count_sv;
2934 cb = av_shift (av);
2935
2936 if (SvOBJECT (cb))
2937 {
2938 api_ready (aTHX_ cb);
2939 --count;
2940 }
2941 else if (SvTYPE (cb) == SVt_PVCV)
2942 {
2943 dSP;
2944 PUSHMARK (SP);
2945 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2946 PUTBACK;
2947 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2948 }
2949
2950 SvREFCNT_dec (cb);
2951 }
2952}
2953
2954static void
2955coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2956{
2957 /* call $sem->adjust (0) to possibly wake up some other waiters */
2958 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2959}
2960
1016static void 2961static int
1017api_cede (void) 2962slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1018{ 2963{
1019 struct transfer_args ta; 2964 AV *av = (AV *)frame->data;
2965 SV *count_sv = AvARRAY (av)[0];
2966 SV *coro_hv = SvRV (coro_current);
1020 2967
1021 prepare_cede (&ta); 2968 /* if we are about to throw, don't actually acquire the lock, just throw */
1022 TRANSFER (ta); 2969 if (CORO_THROW)
1023} 2970 return 0;
2971 else if (SvIVX (count_sv) > 0)
2972 {
2973 frame->destroy = 0;
1024 2974
2975 if (acquire)
2976 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2977 else
2978 coro_semaphore_adjust (aTHX_ av, 0);
2979
2980 return 0;
2981 }
2982 else
2983 {
2984 int i;
2985 /* if we were woken up but can't down, we look through the whole */
2986 /* waiters list and only add us if we aren't in there already */
2987 /* this avoids some degenerate memory usage cases */
2988 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2989 if (AvARRAY (av)[i] == coro_hv)
2990 return 1;
2991
2992 av_push (av, SvREFCNT_inc (coro_hv));
2993 return 1;
2994 }
2995}
2996
2997static int
2998slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2999{
3000 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3001}
3002
3003static int
3004slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3005{
3006 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3007}
3008
3009static void
3010slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3011{
3012 AV *av = (AV *)SvRV (arg [0]);
3013
3014 if (SvIVX (AvARRAY (av)[0]) > 0)
3015 {
3016 frame->data = (void *)av;
3017 frame->prepare = prepare_nop;
3018 }
3019 else
3020 {
3021 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3022
3023 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3024 frame->prepare = prepare_schedule;
3025 /* to avoid race conditions when a woken-up coro gets terminated */
3026 /* we arrange for a temporary on_destroy that calls adjust (0) */
3027 frame->destroy = coro_semaphore_destroy;
3028 }
3029}
3030
3031static void
3032slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3033{
3034 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3035 frame->check = slf_check_semaphore_down;
3036}
3037
3038static void
3039slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3040{
3041 if (items >= 2)
3042 {
3043 /* callback form */
3044 AV *av = (AV *)SvRV (arg [0]);
3045 SV *cb_cv = s_get_cv_croak (arg [1]);
3046
3047 av_push (av, SvREFCNT_inc_NN (cb_cv));
3048
3049 if (SvIVX (AvARRAY (av)[0]) > 0)
3050 coro_semaphore_adjust (aTHX_ av, 0);
3051
3052 frame->prepare = prepare_nop;
3053 frame->check = slf_check_nop;
3054 }
3055 else
3056 {
3057 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3058 frame->check = slf_check_semaphore_wait;
3059 }
3060}
3061
3062/* signal */
3063
3064static void
3065coro_signal_wake (pTHX_ AV *av, int count)
3066{
3067 SvIVX (AvARRAY (av)[0]) = 0;
3068
3069 /* now signal count waiters */
3070 while (count > 0 && AvFILLp (av) > 0)
3071 {
3072 SV *cb;
3073
3074 /* swap first two elements so we can shift a waiter */
3075 cb = AvARRAY (av)[0];
3076 AvARRAY (av)[0] = AvARRAY (av)[1];
3077 AvARRAY (av)[1] = cb;
3078
3079 cb = av_shift (av);
3080
3081 if (SvTYPE (cb) == SVt_PVCV)
3082 {
3083 dSP;
3084 PUSHMARK (SP);
3085 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3086 PUTBACK;
3087 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3088 }
3089 else
3090 {
3091 api_ready (aTHX_ cb);
3092 sv_setiv (cb, 0); /* signal waiter */
3093 }
3094
3095 SvREFCNT_dec (cb);
3096
3097 --count;
3098 }
3099}
3100
3101static int
3102slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3103{
3104 /* if we are about to throw, also stop waiting */
3105 return SvROK ((SV *)frame->data) && !CORO_THROW;
3106}
3107
3108static void
3109slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3110{
3111 AV *av = (AV *)SvRV (arg [0]);
3112
3113 if (items >= 2)
3114 {
3115 SV *cb_cv = s_get_cv_croak (arg [1]);
3116 av_push (av, SvREFCNT_inc_NN (cb_cv));
3117
3118 if (SvIVX (AvARRAY (av)[0]))
3119 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3120
3121 frame->prepare = prepare_nop;
3122 frame->check = slf_check_nop;
3123 }
3124 else if (SvIVX (AvARRAY (av)[0]))
3125 {
3126 SvIVX (AvARRAY (av)[0]) = 0;
3127 frame->prepare = prepare_nop;
3128 frame->check = slf_check_nop;
3129 }
3130 else
3131 {
3132 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3133
3134 av_push (av, waiter);
3135
3136 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3137 frame->prepare = prepare_schedule;
3138 frame->check = slf_check_signal_wait;
3139 }
3140}
3141
3142/*****************************************************************************/
3143/* Coro::AIO */
3144
3145#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3146
3147/* helper storage struct */
3148struct io_state
3149{
3150 int errorno;
3151 I32 laststype; /* U16 in 5.10.0 */
3152 int laststatval;
3153 Stat_t statcache;
3154};
3155
3156static void
3157coro_aio_callback (pTHX_ CV *cv)
3158{
3159 dXSARGS;
3160 AV *state = (AV *)S_GENSUB_ARG;
3161 SV *coro = av_pop (state);
3162 SV *data_sv = newSV (sizeof (struct io_state));
3163
3164 av_extend (state, items - 1);
3165
3166 sv_upgrade (data_sv, SVt_PV);
3167 SvCUR_set (data_sv, sizeof (struct io_state));
3168 SvPOK_only (data_sv);
3169
3170 {
3171 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3172
3173 data->errorno = errno;
3174 data->laststype = PL_laststype;
3175 data->laststatval = PL_laststatval;
3176 data->statcache = PL_statcache;
3177 }
3178
3179 /* now build the result vector out of all the parameters and the data_sv */
3180 {
3181 int i;
3182
3183 for (i = 0; i < items; ++i)
3184 av_push (state, SvREFCNT_inc_NN (ST (i)));
3185 }
3186
3187 av_push (state, data_sv);
3188
3189 api_ready (aTHX_ coro);
3190 SvREFCNT_dec (coro);
3191 SvREFCNT_dec ((AV *)state);
3192}
3193
3194static int
3195slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3196{
3197 AV *state = (AV *)frame->data;
3198
3199 /* if we are about to throw, return early */
3200 /* this does not cancel the aio request, but at least */
3201 /* it quickly returns */
3202 if (CORO_THROW)
3203 return 0;
3204
3205 /* one element that is an RV? repeat! */
3206 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3207 return 1;
3208
3209 /* restore status */
3210 {
3211 SV *data_sv = av_pop (state);
3212 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3213
3214 errno = data->errorno;
3215 PL_laststype = data->laststype;
3216 PL_laststatval = data->laststatval;
3217 PL_statcache = data->statcache;
3218
3219 SvREFCNT_dec (data_sv);
3220 }
3221
3222 /* push result values */
3223 {
3224 dSP;
3225 int i;
3226
3227 EXTEND (SP, AvFILLp (state) + 1);
3228 for (i = 0; i <= AvFILLp (state); ++i)
3229 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3230
3231 PUTBACK;
3232 }
3233
3234 return 0;
3235}
3236
3237static void
3238slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3239{
3240 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3241 SV *coro_hv = SvRV (coro_current);
3242 struct coro *coro = SvSTATE_hv (coro_hv);
3243
3244 /* put our coroutine id on the state arg */
3245 av_push (state, SvREFCNT_inc_NN (coro_hv));
3246
3247 /* first see whether we have a non-zero priority and set it as AIO prio */
3248 if (coro->prio)
3249 {
3250 dSP;
3251
3252 static SV *prio_cv;
3253 static SV *prio_sv;
3254
3255 if (ecb_expect_false (!prio_cv))
3256 {
3257 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3258 prio_sv = newSViv (0);
3259 }
3260
3261 PUSHMARK (SP);
3262 sv_setiv (prio_sv, coro->prio);
3263 XPUSHs (prio_sv);
3264
3265 PUTBACK;
3266 call_sv (prio_cv, G_VOID | G_DISCARD);
3267 }
3268
3269 /* now call the original request */
3270 {
3271 dSP;
3272 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3273 int i;
3274
3275 PUSHMARK (SP);
3276
3277 /* first push all args to the stack */
3278 EXTEND (SP, items + 1);
3279
3280 for (i = 0; i < items; ++i)
3281 PUSHs (arg [i]);
3282
3283 /* now push the callback closure */
3284 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3285
3286 /* now call the AIO function - we assume our request is uncancelable */
3287 PUTBACK;
3288 call_sv ((SV *)req, G_VOID | G_DISCARD);
3289 }
3290
3291 /* now that the request is going, we loop till we have a result */
3292 frame->data = (void *)state;
3293 frame->prepare = prepare_schedule;
3294 frame->check = slf_check_aio_req;
3295}
3296
3297static void
3298coro_aio_req_xs (pTHX_ CV *cv)
3299{
3300 dXSARGS;
3301
3302 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3303
3304 XSRETURN_EMPTY;
3305}
3306
3307/*****************************************************************************/
3308
3309#if CORO_CLONE
3310# include "clone.c"
3311#endif
3312
3313/*****************************************************************************/
3314
3315static SV *
3316coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3317{
3318 SV *coro_sv;
3319 struct coro *coro;
3320 MAGIC *mg;
3321 HV *hv;
3322 SV *cb;
3323 int i;
3324
3325 if (argc > 0)
3326 {
3327 cb = s_get_cv_croak (argv [0]);
3328
3329 if (!is_coro)
3330 {
3331 if (CvISXSUB (cb))
3332 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3333
3334 if (!CvROOT (cb))
3335 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3336 }
3337 }
3338
3339 Newz (0, coro, 1, struct coro);
3340 coro->args = newAV ();
3341 coro->flags = CF_NEW;
3342
3343 if (coro_first) coro_first->prev = coro;
3344 coro->next = coro_first;
3345 coro_first = coro;
3346
3347 coro->hv = hv = newHV ();
3348 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3349 mg->mg_flags |= MGf_DUP;
3350 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3351
3352 if (argc > 0)
3353 {
3354 av_extend (coro->args, argc + is_coro - 1);
3355
3356 if (is_coro)
3357 {
3358 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3359 cb = (SV *)cv_coro_run;
3360 }
3361
3362 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3363
3364 for (i = 1; i < argc; i++)
3365 av_push (coro->args, newSVsv (argv [i]));
3366 }
3367
3368 return coro_sv;
3369}
3370
3371#ifndef __cplusplus
3372ecb_cold XS(boot_Coro__State);
3373#endif
3374
3375#if CORO_JIT
3376
3377static void ecb_noinline ecb_cold
3378pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3379{
3380 dSP;
3381 AV *av = newAV ();
3382
3383 av_store (av, 3, newSVuv (d));
3384 av_store (av, 2, newSVuv (c));
3385 av_store (av, 1, newSVuv (b));
3386 av_store (av, 0, newSVuv (a));
3387
3388 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3389
3390 PUTBACK;
3391}
3392
3393static void ecb_noinline ecb_cold
3394jit_init (pTHX)
3395{
3396 dSP;
3397 SV *load, *save;
3398 char *map_base;
3399 char *load_ptr, *save_ptr;
3400 STRLEN load_len, save_len, map_len;
3401 int count;
3402
3403 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3404
3405 PUSHMARK (SP);
3406#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3407# include "state.h"
3408#undef VARx
3409 count = call_pv ("Coro::State::_jit", G_ARRAY);
3410 SPAGAIN;
3411
3412 save = POPs; save_ptr = SvPVbyte (save, save_len);
3413 load = POPs; load_ptr = SvPVbyte (load, load_len);
3414
3415 map_len = load_len + save_len + 16;
3416
3417 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3418
3419 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3420
3421 load_perl_slots = (load_save_perl_slots_type)map_base;
3422 memcpy (map_base, load_ptr, load_len);
3423
3424 map_base += (load_len + 15) & ~15;
3425
3426 save_perl_slots = (load_save_perl_slots_type)map_base;
3427 memcpy (map_base, save_ptr, save_len);
3428
3429 /* we are good citizens and try to make the page read-only, so the evil evil */
3430 /* hackers might have it a bit more difficult */
3431 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3432
3433 PUTBACK;
3434 eval_pv ("undef &Coro::State::_jit", 1);
3435}
3436
3437#endif
3438
1025MODULE = Coro::State PACKAGE = Coro::State 3439MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1026 3440
1027PROTOTYPES: DISABLE 3441PROTOTYPES: DISABLE
1028 3442
1029BOOT: 3443BOOT:
1030{ 3444{
1031#ifdef USE_ITHREADS 3445#ifdef USE_ITHREADS
1032 MUTEX_INIT (&coro_mutex); 3446# if CORO_PTHREAD
3447 coro_thx = PERL_GET_CONTEXT;
3448# endif
1033#endif 3449#endif
1034 BOOT_PAGESIZE; 3450 BOOT_PAGESIZE;
1035 3451
3452 /* perl defines these to check for existance first, but why it doesn't */
3453 /* just create them one at init time is not clear to me, except for */
3454 /* programs trying to delete them, but... */
3455 /* anyway, we declare this as invalid and make sure they are initialised here */
3456 DEFSV;
3457 ERRSV;
3458
3459 cctx_current = cctx_new_empty ();
3460
3461 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3462 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3463
3464 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3465 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3466 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3467
3468 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3469 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3470 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3471
1036 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3472 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037 3473
1038 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3474 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3475 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1040 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3476 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3477 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1041 3478
1042 main_mainstack = PL_mainstack; 3479 main_mainstack = PL_mainstack;
3480 main_top_env = PL_top_env;
1043 3481
3482 while (main_top_env->je_prev)
3483 main_top_env = main_top_env->je_prev;
3484
3485 {
3486 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3487
3488 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3489 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3490
3491 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3492 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3493 }
3494
1044 coroapi.ver = CORO_API_VERSION; 3495 coroapi.ver = CORO_API_VERSION;
3496 coroapi.rev = CORO_API_REVISION;
3497
1045 coroapi.transfer = api_transfer; 3498 coroapi.transfer = api_transfer;
1046 3499
3500 coroapi.sv_state = SvSTATE_;
3501 coroapi.execute_slf = api_execute_slf;
3502 coroapi.prepare_nop = prepare_nop;
3503 coroapi.prepare_schedule = prepare_schedule;
3504 coroapi.prepare_cede = prepare_cede;
3505 coroapi.prepare_cede_notself = prepare_cede_notself;
3506
3507 time_init (aTHX);
3508
1047 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3509 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3510#if CORO_JIT
3511 PUTBACK;
3512 jit_init (aTHX);
3513 SPAGAIN;
3514#endif
1048} 3515}
1049 3516
1050SV * 3517SV *
1051new (char *klass, ...) 3518new (SV *klass, ...)
3519 ALIAS:
3520 Coro::new = 1
1052 CODE: 3521 CODE:
1053{ 3522 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1054 struct coro *coro; 3523 OUTPUT:
1055 HV *hv;
1056 int i;
1057
1058 Newz (0, coro, 1, struct coro);
1059 coro->args = newAV ();
1060 coro->flags = CF_NEW;
1061
1062 hv = newHV ();
1063 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065
1066 for (i = 1; i < items; i++)
1067 av_push (coro->args, newSVsv (ST (i)));
1068}
1069 OUTPUT:
1070 RETVAL 3524 RETVAL
1071 3525
1072void 3526void
1073_set_stacklevel (...) 3527transfer (...)
1074 ALIAS: 3528 PROTOTYPE: $$
1075 Coro::State::transfer = 1 3529 CODE:
1076 Coro::schedule = 2 3530 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1077 Coro::cede = 3
1078 CODE:
1079{
1080 struct transfer_args ta;
1081
1082 switch (ix)
1083 {
1084 case 0:
1085 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086 ta.next = 0;
1087 ta.flags = TRANSFER_SET_STACKLEVEL;
1088 break;
1089
1090 case 1:
1091 if (items != 3)
1092 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1093
1094 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1095 break;
1096
1097 case 2:
1098 prepare_schedule (&ta);
1099 break;
1100
1101 case 3:
1102 prepare_cede (&ta);
1103 break;
1104 }
1105
1106 TRANSFER (ta);
1107}
1108 3531
1109void 3532void
1110_clone_state_from (SV *dst, SV *src)
1111 CODE:
1112{
1113 struct coro *coro_src = SvSTATE (src);
1114
1115 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117 ++coro_src->refcnt;
1118 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119}
1120
1121void
1122_exit (code) 3533_exit (int code)
1123 int code
1124 PROTOTYPE: $ 3534 PROTOTYPE: $
1125 CODE: 3535 CODE:
1126 _exit (code); 3536 _exit (code);
1127 3537
3538SV *
3539clone (Coro::State coro)
3540 CODE:
3541{
3542#if CORO_CLONE
3543 struct coro *ncoro = coro_clone (aTHX_ coro);
3544 MAGIC *mg;
3545 /* TODO: too much duplication */
3546 ncoro->hv = newHV ();
3547 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3548 mg->mg_flags |= MGf_DUP;
3549 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3550#else
3551 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3552#endif
3553}
3554 OUTPUT:
3555 RETVAL
3556
3557int
3558cctx_stacksize (int new_stacksize = 0)
3559 PROTOTYPE: ;$
3560 CODE:
3561 RETVAL = cctx_stacksize;
3562 if (new_stacksize)
3563 {
3564 cctx_stacksize = new_stacksize;
3565 ++cctx_gen;
3566 }
3567 OUTPUT:
3568 RETVAL
3569
3570int
3571cctx_max_idle (int max_idle = 0)
3572 PROTOTYPE: ;$
3573 CODE:
3574 RETVAL = cctx_max_idle;
3575 if (max_idle > 1)
3576 cctx_max_idle = max_idle;
3577 OUTPUT:
3578 RETVAL
3579
1128int 3580int
1129cctx_count () 3581cctx_count ()
3582 PROTOTYPE:
1130 CODE: 3583 CODE:
1131 RETVAL = cctx_count; 3584 RETVAL = cctx_count;
1132 OUTPUT: 3585 OUTPUT:
1133 RETVAL 3586 RETVAL
1134 3587
1135int 3588int
1136cctx_idle () 3589cctx_idle ()
3590 PROTOTYPE:
1137 CODE: 3591 CODE:
1138 RETVAL = cctx_idle; 3592 RETVAL = cctx_idle;
1139 OUTPUT: 3593 OUTPUT:
1140 RETVAL 3594 RETVAL
1141 3595
3596void
3597list ()
3598 PROTOTYPE:
3599 PPCODE:
3600{
3601 struct coro *coro;
3602 for (coro = coro_first; coro; coro = coro->next)
3603 if (coro->hv)
3604 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3605}
3606
3607void
3608call (Coro::State coro, SV *coderef)
3609 ALIAS:
3610 eval = 1
3611 CODE:
3612{
3613 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3614 {
3615 struct coro *current = SvSTATE_current;
3616 struct CoroSLF slf_save;
3617
3618 if (current != coro)
3619 {
3620 PUTBACK;
3621 save_perl (aTHX_ current);
3622 load_perl (aTHX_ coro);
3623 /* the coro is most likely in an active SLF call.
3624 * while not strictly required (the code we execute is
3625 * not allowed to call any SLF functions), it's cleaner
3626 * to reinitialise the slf_frame and restore it later.
3627 * This might one day allow us to actually do SLF calls
3628 * from code executed here.
3629 */
3630 slf_save = slf_frame;
3631 slf_frame.prepare = 0;
3632 SPAGAIN;
3633 }
3634
3635 PUSHSTACK;
3636
3637 PUSHMARK (SP);
3638 PUTBACK;
3639
3640 if (ix)
3641 eval_sv (coderef, 0);
3642 else
3643 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3644
3645 POPSTACK;
3646 SPAGAIN;
3647
3648 if (current != coro)
3649 {
3650 PUTBACK;
3651 slf_frame = slf_save;
3652 save_perl (aTHX_ coro);
3653 load_perl (aTHX_ current);
3654 SPAGAIN;
3655 }
3656 }
3657}
3658
3659SV *
3660is_ready (Coro::State coro)
3661 PROTOTYPE: $
3662 ALIAS:
3663 is_ready = CF_READY
3664 is_running = CF_RUNNING
3665 is_new = CF_NEW
3666 is_destroyed = CF_ZOMBIE
3667 is_zombie = CF_ZOMBIE
3668 is_suspended = CF_SUSPENDED
3669 CODE:
3670 RETVAL = boolSV (coro->flags & ix);
3671 OUTPUT:
3672 RETVAL
3673
3674void
3675throw (Coro::State self, SV *exception = &PL_sv_undef)
3676 PROTOTYPE: $;$
3677 CODE:
3678{
3679 struct coro *current = SvSTATE_current;
3680 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3681 SvREFCNT_dec (*exceptionp);
3682 SvGETMAGIC (exception);
3683 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3684}
3685
3686void
3687api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3688 PROTOTYPE: $;$
3689 C_ARGS: aTHX_ coro, flags
3690
3691SV *
3692has_cctx (Coro::State coro)
3693 PROTOTYPE: $
3694 CODE:
3695 /* maybe manage the running flag differently */
3696 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3697 OUTPUT:
3698 RETVAL
3699
3700int
3701is_traced (Coro::State coro)
3702 PROTOTYPE: $
3703 CODE:
3704 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3705 OUTPUT:
3706 RETVAL
3707
3708UV
3709rss (Coro::State coro)
3710 PROTOTYPE: $
3711 ALIAS:
3712 usecount = 1
3713 CODE:
3714 switch (ix)
3715 {
3716 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3717 case 1: RETVAL = coro->usecount; break;
3718 }
3719 OUTPUT:
3720 RETVAL
3721
3722void
3723force_cctx ()
3724 PROTOTYPE:
3725 CODE:
3726 cctx_current->idle_sp = 0;
3727
3728void
3729swap_defsv (Coro::State self)
3730 PROTOTYPE: $
3731 ALIAS:
3732 swap_defav = 1
3733 CODE:
3734 if (!self->slot)
3735 croak ("cannot swap state with coroutine that has no saved state,");
3736 else
3737 {
3738 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3739 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3740
3741 SV *tmp = *src; *src = *dst; *dst = tmp;
3742 }
3743
3744void
3745cancel (Coro::State self)
3746 CODE:
3747 coro_state_destroy (aTHX_ self);
3748
3749SV *
3750enable_times (int enabled = enable_times)
3751 CODE:
3752{
3753 RETVAL = boolSV (enable_times);
3754
3755 if (enabled != enable_times)
3756 {
3757 enable_times = enabled;
3758
3759 coro_times_update ();
3760 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3761 }
3762}
3763 OUTPUT:
3764 RETVAL
3765
3766void
3767times (Coro::State self)
3768 PPCODE:
3769{
3770 struct coro *current = SvSTATE (coro_current);
3771
3772 if (ecb_expect_false (current == self))
3773 {
3774 coro_times_update ();
3775 coro_times_add (SvSTATE (coro_current));
3776 }
3777
3778 EXTEND (SP, 2);
3779 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3780 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3781
3782 if (ecb_expect_false (current == self))
3783 coro_times_sub (SvSTATE (coro_current));
3784}
3785
3786void
3787swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3788 CODE:
3789{
3790 struct coro *current = SvSTATE_current;
3791
3792 if (current == coro)
3793 SWAP_SVS (current);
3794
3795 if (!coro->swap_sv)
3796 coro->swap_sv = newAV ();
3797
3798 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3799 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3800
3801 if (current == coro)
3802 SWAP_SVS (current);
3803}
3804
3805
1142MODULE = Coro::State PACKAGE = Coro 3806MODULE = Coro::State PACKAGE = Coro
1143 3807
1144BOOT: 3808BOOT:
1145{ 3809{
1146 int i; 3810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3812 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3813 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3815 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3816 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3817 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1147 3818
3819 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3820 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3821 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3822 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3823
1148 coro_stash = gv_stashpv ("Coro", TRUE); 3824 coro_stash = gv_stashpv ("Coro", TRUE);
1149 3825
1150 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3826 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1151 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3827 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1152 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3828 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1153 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3829 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1154 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3830 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1155 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3831 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1156
1157 coro_current = get_sv ("Coro::current", FALSE);
1158 SvREADONLY_on (coro_current);
1159
1160 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161 coro_ready[i] = newAV ();
1162 3832
1163 { 3833 {
1164 SV *sv = perl_get_sv("Coro::API", 1); 3834 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1165 3835
1166 coroapi.schedule = api_schedule; 3836 coroapi.schedule = api_schedule;
3837 coroapi.schedule_to = api_schedule_to;
1167 coroapi.cede = api_cede; 3838 coroapi.cede = api_cede;
3839 coroapi.cede_notself = api_cede_notself;
1168 coroapi.ready = api_ready; 3840 coroapi.ready = api_ready;
1169 coroapi.is_ready = api_is_ready; 3841 coroapi.is_ready = api_is_ready;
1170 coroapi.nready = &coro_nready; 3842 coroapi.nready = coro_nready;
1171 coroapi.current = coro_current; 3843 coroapi.current = coro_current;
1172 3844
1173 GCoroAPI = &coroapi; 3845 /*GCoroAPI = &coroapi;*/
1174 sv_setiv (sv, (IV)&coroapi); 3846 sv_setiv (sv, (IV)&coroapi);
1175 SvREADONLY_on (sv); 3847 SvREADONLY_on (sv);
1176 } 3848 }
1177} 3849}
1178 3850
3851SV *
3852async (...)
3853 PROTOTYPE: &@
3854 CODE:
3855 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3856 api_ready (aTHX_ RETVAL);
3857 OUTPUT:
3858 RETVAL
3859
3860void
3861_destroy (Coro::State coro)
3862 CODE:
3863 /* used by the manager thread */
3864 coro_state_destroy (aTHX_ coro);
3865
3866void
3867on_destroy (Coro::State coro, SV *cb)
3868 CODE:
3869 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3870
3871void
3872join (...)
3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_join);
3875
3876void
3877terminate (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3880
3881void
3882cancel (...)
3883 CODE:
3884 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3885
3886int
3887safe_cancel (Coro::State self, ...)
3888 C_ARGS: aTHX_ self, &ST (1), items - 1
3889
3890void
3891schedule (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3894
3895void
3896schedule_to (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3899
3900void
3901cede_to (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3904
3905void
3906cede (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_cede);
3909
3910void
3911cede_notself (...)
3912 CODE:
3913 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3914
3915void
3916_set_current (SV *current)
3917 PROTOTYPE: $
3918 CODE:
3919 SvREFCNT_dec (SvRV (coro_current));
3920 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3921
3922void
3923_set_readyhook (SV *hook)
3924 PROTOTYPE: $
3925 CODE:
3926 SvREFCNT_dec (coro_readyhook);
3927 SvGETMAGIC (hook);
3928 if (SvOK (hook))
3929 {
3930 coro_readyhook = newSVsv (hook);
3931 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3932 }
3933 else
3934 {
3935 coro_readyhook = 0;
3936 CORO_READYHOOK = 0;
3937 }
3938
1179int 3939int
1180prio (Coro::State coro, int newprio = 0) 3940prio (Coro::State coro, int newprio = 0)
3941 PROTOTYPE: $;$
1181 ALIAS: 3942 ALIAS:
1182 nice = 1 3943 nice = 1
1183 CODE: 3944 CODE:
1184{ 3945{
1185 RETVAL = coro->prio; 3946 RETVAL = coro->prio;
1186 3947
1187 if (items > 1) 3948 if (items > 1)
1188 { 3949 {
1189 if (ix) 3950 if (ix)
1190 newprio += coro->prio; 3951 newprio = coro->prio - newprio;
1191 3952
1192 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3953 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1193 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3954 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1194 3955
1195 coro->prio = newprio; 3956 coro->prio = newprio;
1196 } 3957 }
1197} 3958}
3959 OUTPUT:
3960 RETVAL
1198 3961
1199SV * 3962SV *
1200ready (SV *self) 3963ready (SV *self)
1201 PROTOTYPE: $ 3964 PROTOTYPE: $
1202 CODE: 3965 CODE:
1203 RETVAL = boolSV (api_ready (self)); 3966 RETVAL = boolSV (api_ready (aTHX_ self));
1204 OUTPUT:
1205 RETVAL
1206
1207SV *
1208is_ready (SV *self)
1209 PROTOTYPE: $
1210 CODE:
1211 RETVAL = boolSV (api_is_ready (self));
1212 OUTPUT: 3967 OUTPUT:
1213 RETVAL 3968 RETVAL
1214 3969
1215int 3970int
1216nready (...) 3971nready (...)
… …
1219 RETVAL = coro_nready; 3974 RETVAL = coro_nready;
1220 OUTPUT: 3975 OUTPUT:
1221 RETVAL 3976 RETVAL
1222 3977
1223void 3978void
1224_set_current (SV *current) 3979suspend (Coro::State self)
1225 PROTOTYPE: $ 3980 PROTOTYPE: $
1226 CODE: 3981 CODE:
1227 SvREFCNT_dec (SvRV (coro_current)); 3982 self->flags |= CF_SUSPENDED;
1228 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1229 3983
1230MODULE = Coro::State PACKAGE = Coro::AIO 3984void
3985resume (Coro::State self)
3986 PROTOTYPE: $
3987 CODE:
3988 self->flags &= ~CF_SUSPENDED;
3989
3990void
3991_pool_handler (...)
3992 CODE:
3993 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3994
3995void
3996async_pool (SV *cv, ...)
3997 PROTOTYPE: &@
3998 PPCODE:
3999{
4000 HV *hv = (HV *)av_pop (av_async_pool);
4001 AV *av = newAV ();
4002 SV *cb = ST (0);
4003 int i;
4004
4005 av_extend (av, items - 2);
4006 for (i = 1; i < items; ++i)
4007 av_push (av, SvREFCNT_inc_NN (ST (i)));
4008
4009 if ((SV *)hv == &PL_sv_undef)
4010 {
4011 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4012 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4013 SvREFCNT_dec (sv);
4014 }
4015
4016 {
4017 struct coro *coro = SvSTATE_hv (hv);
4018
4019 assert (!coro->invoke_cb);
4020 assert (!coro->invoke_av);
4021 coro->invoke_cb = SvREFCNT_inc (cb);
4022 coro->invoke_av = av;
4023 }
4024
4025 api_ready (aTHX_ (SV *)hv);
4026
4027 if (GIMME_V != G_VOID)
4028 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4029 else
4030 SvREFCNT_dec (hv);
4031}
1231 4032
1232SV * 4033SV *
1233_get_state () 4034rouse_cb ()
4035 PROTOTYPE:
1234 CODE: 4036 CODE:
1235{ 4037 RETVAL = coro_new_rouse_cb (aTHX);
1236 struct {
1237 int errorno;
1238 int laststype;
1239 int laststatval;
1240 Stat_t statcache;
1241 } data;
1242
1243 data.errorno = errno;
1244 data.laststype = PL_laststype;
1245 data.laststatval = PL_laststatval;
1246 data.statcache = PL_statcache;
1247
1248 RETVAL = newSVpvn ((char *)&data, sizeof data);
1249}
1250 OUTPUT: 4038 OUTPUT:
1251 RETVAL 4039 RETVAL
1252 4040
1253void 4041void
1254_set_state (char *data_) 4042rouse_wait (...)
4043 PROTOTYPE: ;$
4044 PPCODE:
4045 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4046
4047void
4048on_enter (SV *block)
4049 ALIAS:
4050 on_leave = 1
1255 PROTOTYPE: $ 4051 PROTOTYPE: &
1256 CODE: 4052 CODE:
1257{ 4053{
1258 struct { 4054 struct coro *coro = SvSTATE_current;
4055 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4056
4057 block = s_get_cv_croak (block);
4058
4059 if (!*avp)
4060 *avp = newAV ();
4061
4062 av_push (*avp, SvREFCNT_inc (block));
4063
4064 if (!ix)
4065 on_enterleave_call (aTHX_ block);
4066
4067 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4068 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4069 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4070}
4071
4072
4073MODULE = Coro::State PACKAGE = PerlIO::cede
4074
4075BOOT:
4076 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4077
4078
4079MODULE = Coro::State PACKAGE = Coro::Semaphore
4080
4081SV *
4082new (SV *klass, SV *count = 0)
4083 CODE:
4084{
4085 int semcnt = 1;
4086
4087 if (count)
4088 {
4089 SvGETMAGIC (count);
4090
4091 if (SvOK (count))
4092 semcnt = SvIV (count);
4093 }
4094
4095 RETVAL = sv_bless (
4096 coro_waitarray_new (aTHX_ semcnt),
4097 GvSTASH (CvGV (cv))
4098 );
4099}
4100 OUTPUT:
4101 RETVAL
4102
4103# helper for Coro::Channel and others
4104SV *
4105_alloc (int count)
4106 CODE:
4107 RETVAL = coro_waitarray_new (aTHX_ count);
4108 OUTPUT:
4109 RETVAL
4110
4111SV *
4112count (SV *self)
4113 CODE:
4114 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4115 OUTPUT:
4116 RETVAL
4117
4118void
4119up (SV *self, int adjust = 1)
4120 ALIAS:
4121 adjust = 1
4122 CODE:
4123 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4124
4125void
4126down (...)
4127 CODE:
4128 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4129
4130void
4131wait (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4134
4135void
4136try (SV *self)
4137 PPCODE:
4138{
4139 AV *av = (AV *)SvRV (self);
4140 SV *count_sv = AvARRAY (av)[0];
4141 IV count = SvIVX (count_sv);
4142
4143 if (count > 0)
4144 {
4145 --count;
4146 SvIVX (count_sv) = count;
4147 XSRETURN_YES;
4148 }
4149 else
4150 XSRETURN_NO;
4151}
4152
4153void
4154waiters (SV *self)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (self);
4158 int wcount = AvFILLp (av) + 1 - 1;
4159
4160 if (GIMME_V == G_SCALAR)
4161 XPUSHs (sv_2mortal (newSViv (wcount)));
4162 else
4163 {
1259 int errorno; 4164 int i;
1260 int laststype; 4165 EXTEND (SP, wcount);
1261 int laststatval; 4166 for (i = 1; i <= wcount; ++i)
1262 Stat_t statcache; 4167 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1263 } *data = (void *)data_; 4168 }
1264
1265 errno = data->errorno;
1266 PL_laststype = data->laststype;
1267 PL_laststatval = data->laststatval;
1268 PL_statcache = data->statcache;
1269} 4169}
4170
4171MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4172
4173void
4174_may_delete (SV *sem, int count, unsigned int extra_refs)
4175 PPCODE:
4176{
4177 AV *av = (AV *)SvRV (sem);
4178
4179 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4180 && AvFILLp (av) == 0 /* no waiters, just count */
4181 && SvIV (AvARRAY (av)[0]) == count)
4182 XSRETURN_YES;
4183
4184 XSRETURN_NO;
4185}
4186
4187MODULE = Coro::State PACKAGE = Coro::Signal
4188
4189SV *
4190new (SV *klass)
4191 CODE:
4192 RETVAL = sv_bless (
4193 coro_waitarray_new (aTHX_ 0),
4194 GvSTASH (CvGV (cv))
4195 );
4196 OUTPUT:
4197 RETVAL
4198
4199void
4200wait (...)
4201 CODE:
4202 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4203
4204void
4205broadcast (SV *self)
4206 CODE:
4207{
4208 AV *av = (AV *)SvRV (self);
4209 coro_signal_wake (aTHX_ av, AvFILLp (av));
4210}
4211
4212void
4213send (SV *self)
4214 CODE:
4215{
4216 AV *av = (AV *)SvRV (self);
4217
4218 if (AvFILLp (av))
4219 coro_signal_wake (aTHX_ av, 1);
4220 else
4221 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4222}
4223
4224IV
4225awaited (SV *self)
4226 CODE:
4227 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4228 OUTPUT:
4229 RETVAL
4230
4231
4232MODULE = Coro::State PACKAGE = Coro::AnyEvent
4233
4234BOOT:
4235 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4236
4237void
4238_schedule (...)
4239 CODE:
4240{
4241 static int incede;
4242
4243 api_cede_notself (aTHX);
4244
4245 ++incede;
4246 while (coro_nready >= incede && api_cede (aTHX))
4247 ;
4248
4249 sv_setsv (sv_activity, &PL_sv_undef);
4250 if (coro_nready >= incede)
4251 {
4252 PUSHMARK (SP);
4253 PUTBACK;
4254 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4255 }
4256
4257 --incede;
4258}
4259
4260
4261MODULE = Coro::State PACKAGE = Coro::AIO
4262
4263void
4264_register (char *target, char *proto, SV *req)
4265 CODE:
4266{
4267 SV *req_cv = s_get_cv_croak (req);
4268 /* newXSproto doesn't return the CV on 5.8 */
4269 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4270 sv_setpv ((SV *)slf_cv, proto);
4271 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4272}
4273
4274MODULE = Coro::State PACKAGE = Coro::Select
4275
4276void
4277patch_pp_sselect ()
4278 CODE:
4279 if (!coro_old_pp_sselect)
4280 {
4281 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4282 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4283 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4284 }
4285
4286void
4287unpatch_pp_sselect ()
4288 CODE:
4289 if (coro_old_pp_sselect)
4290 {
4291 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4292 coro_old_pp_sselect = 0;
4293 }
4294

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