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Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.414 by root, Wed Jun 29 16:08:31 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
8 18
9#define PERL_VERSION_ATLEAST(a,b,c) \ 19#include <stddef.h>
10 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14
15#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
35
36#include <stdio.h> 20#include <stdio.h>
37#include <errno.h> 21#include <errno.h>
22#include <assert.h>
38 23
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 24#ifndef SVs_PADSTALE
40# undef STACKGUARD 25# define SVs_PADSTALE 0
41#endif 26#endif
42 27
43#ifndef STACKGUARD 28#if defined(_WIN32)
44# 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 */
45#endif 36#endif
46 37
47#ifdef HAVE_MMAP 38#if HAVE_MMAP
48# include <unistd.h> 39# include <unistd.h>
49# include <sys/mman.h> 40# include <sys/mman.h>
50# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
51# ifdef MAP_ANON 42# ifdef MAP_ANON
52# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
58# ifndef PAGESIZE 49# ifndef PAGESIZE
59# define PAGESIZE pagesize 50# define PAGESIZE pagesize
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize; 52static long pagesize;
62# else 53# else
63# define BOOT_PAGESIZE 54# define BOOT_PAGESIZE (void)0
64# endif 55# endif
65#endif
66
67/* The next macro should declare a variable stacklevel that contains and approximation
68 * to the current C stack pointer. Its property is that it changes with each call
69 * and should be unique. */
70#define dSTACKLEVEL int stacklevel
71#define STACKLEVEL ((void *)&stacklevel)
72
73#define IN_DESTRUCT (PL_main_cv == Nullcv)
74
75#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x)
77#else 56#else
78# define attribute(x) 57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
79#endif 59#endif
80 60
81#define NOINLINE attribute ((noinline)) 61#if CORO_USE_VALGRIND
62# include <valgrind/valgrind.h>
63#endif
64
65/* the maximum number of idle cctx that will be pooled */
66static int cctx_max_idle = 4;
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. */
87#if __GNUC__ >= 4
88# define dSTACKLEVEL int stacklevel_dummy
89# define STACKLEVEL __builtin_frame_address (0)
90#else
91# define dSTACKLEVEL volatile void *stacklevel
92# define STACKLEVEL ((void *)&stacklevel)
93#endif
94
95#define IN_DESTRUCT PL_dirty
82 96
83#include "CoroAPI.h" 97#include "CoroAPI.h"
84 98#define GCoroAPI (&coroapi) /* very sneaky */
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86 99
87#ifdef USE_ITHREADS 100#ifdef USE_ITHREADS
88static perl_mutex coro_mutex; 101# if CORO_PTHREAD
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 102static void *coro_thx;
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else
92# define LOCK (void)0
93# define UNLOCK (void)0
94#endif 103# endif
104#endif
95 105
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;
96static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
97static 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;
98static HV *coro_state_stash, *coro_stash; 132static HV *coro_state_stash, *coro_stash;
99static 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;
161
162static struct coro_cctx *cctx_first;
163static int cctx_count, cctx_idle;
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};
100 174
101/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 176typedef struct coro_cctx
177{
103 struct coro_stack *next; 178 struct coro_cctx *next;
104 179
105 /* the stack */ 180 /* the stack */
106 void *sptr; 181 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 182 size_t ssize;
108 183
109 /* cpu state */ 184 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 187 JMPENV *top_env;
112 coro_context cctx; 188 coro_context cctx;
113} coro_stack; 189
190 U32 gen;
191#if CORO_USE_VALGRIND
192 int valgrind_id;
193#endif
194 unsigned char flags;
195} coro_cctx;
196
197static coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201static MGVTBL coro_state_vtbl;
202
203enum
204{
205 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */
208 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
211};
212
213/* the structure where most of the perl state is stored, overlaid on the cxstack */
214typedef struct
215{
216#define VARx(name,expr,type) type name;
217# include "state.h"
218#undef VARx
219} perl_slots;
220
221/* how many context stack entries do we need for perl_slots */
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 223
115/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
116struct coro { 225struct coro
226{
117 /* the c coroutine allocated to this perl coroutine, if any */ 227 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 228 coro_cctx *cctx;
119 229
120 /* data associated with this coroutine (initial args) */ 230 /* ready queue */
121 AV *args; 231 struct coro *next_ready;
122 int refcnt;
123 232
124 /* optionally saved, might be zero */ 233 /* state data */
125 AV *defav; 234 struct CoroSLF slf_frame; /* saved slf frame */
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 235 AV *mainstack;
137 SV **stack_sp; 236 perl_slots *slot; /* basically the saved sp */
138 OP *op; 237
139 SV **curpad; 238 CV *startcv; /* the CV to execute */
140 AV *comppad; 239 AV *args; /* data associated with this coroutine (initial args) */
141 CV *compcv; 240 int flags; /* CF_ flags */
142 SV **stack_base; 241 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 242
144 SV **tmps_stack; 243 /* statistics */
145 I32 tmps_floor; 244 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 245
163 /* coro process data */ 246 /* coro process data */
164 int prio; 247 int prio;
248 SV *except; /* exception to be thrown */
249 SV *rouse_cb; /* last rouse callback */
250 AV *on_destroy; /* callbacks or coros to notify on destroy */
251 AV *status; /* the exit status list */
252
253 /* async_pool */
254 SV *saved_deffh;
255 SV *invoke_cb;
256 AV *invoke_av;
257
258 /* on_enter/on_leave */
259 AV *on_enter;
260 AV *on_leave;
261
262 /* swap_sv */
263 AV *swap_sv;
264
265 /* times */
266 coro_ts t_cpu, t_real;
267
268 /* linked list */
269 struct coro *next, *prev;
165}; 270};
166 271
167typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
169 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the main reason we don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
280/** Coro ********************************************************************/
281
282#define CORO_PRIO_MAX 3
283#define CORO_PRIO_HIGH 1
284#define CORO_PRIO_NORMAL 0
285#define CORO_PRIO_LOW -1
286#define CORO_PRIO_IDLE -3
287#define CORO_PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
293static CV *cv_coro_run;
294static struct coro *coro_first;
295#define coro_nready coroapi.nready
296
297/** JIT *********************************************************************/
298
299#if CORO_JIT
300 /* APPLE doesn't have HAVE_MMAP though */
301 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
302 #ifndef CORO_JIT_TYPE
303 #if __x86_64 && CORO_JIT_UNIXY
304 #define CORO_JIT_TYPE "amd64-unix"
305 #elif __i386 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "x86-unix"
307 #endif
308 #endif
309#endif
310
311#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
312 #undef CORO_JIT
313#endif
314
315#if CORO_JIT
316 typedef void (*load_save_perl_slots_type)(perl_slots *);
317 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
318#endif
319
320/** Coro::Select ************************************************************/
321
322static OP *(*coro_old_pp_sselect) (pTHX);
323static SV *coro_select_select;
324
325/* horrible hack, but if it works... */
170static AV * 326static OP *
327coro_pp_sselect (pTHX)
328{
329 dSP;
330 PUSHMARK (SP - 4); /* fake argument list */
331 XPUSHs (coro_select_select);
332 PUTBACK;
333
334 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
335 PL_op->op_flags |= OPf_STACKED;
336 PL_op->op_private = 0;
337 return PL_ppaddr [OP_ENTERSUB](aTHX);
338}
339
340/** time stuff **************************************************************/
341
342#ifdef HAS_GETTIMEOFDAY
343
344ecb_inline void
345coro_u2time (pTHX_ UV ret[2])
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 ret [0] = tv.tv_sec;
351 ret [1] = tv.tv_usec;
352}
353
354ecb_inline double
355coro_nvtime (void)
356{
357 struct timeval tv;
358 gettimeofday (&tv, 0);
359
360 return tv.tv_sec + tv.tv_usec * 1e-6;
361}
362
363ecb_inline void
364time_init (pTHX)
365{
366 nvtime = coro_nvtime;
367 u2time = coro_u2time;
368}
369
370#else
371
372ecb_inline void
373time_init (pTHX)
374{
375 SV **svp;
376
377 require_pv ("Time/HiRes.pm");
378
379 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
380
381 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
382 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
383
384 nvtime = INT2PTR (double (*)(), SvIV (*svp));
385
386 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
387 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
388}
389
390#endif
391
392/** lowlevel stuff **********************************************************/
393
394static SV * ecb_noinline
395coro_get_sv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_sv (name, create);
400#endif
401 return get_sv (name, create);
402}
403
404static AV * ecb_noinline
405coro_get_av (pTHX_ const char *name, int create)
406{
407#if PERL_VERSION_ATLEAST (5,10,0)
408 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
409 get_av (name, create);
410#endif
411 return get_av (name, create);
412}
413
414static HV * ecb_noinline
415coro_get_hv (pTHX_ const char *name, int create)
416{
417#if PERL_VERSION_ATLEAST (5,10,0)
418 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
419 get_hv (name, create);
420#endif
421 return get_hv (name, create);
422}
423
424ecb_inline void
425coro_times_update (void)
426{
427#ifdef coro_clock_gettime
428 struct timespec ts;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
432 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
433
434 ts.tv_sec = ts.tv_nsec = 0;
435 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
436 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
437#else
438 dTHX;
439 UV tv[2];
440
441 u2time (aTHX_ tv);
442 time_real [0] = tv [0];
443 time_real [1] = tv [1] * 1000;
444#endif
445}
446
447ecb_inline void
448coro_times_add (struct coro *c)
449{
450 c->t_real [1] += time_real [1];
451 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
452 c->t_real [0] += time_real [0];
453
454 c->t_cpu [1] += time_cpu [1];
455 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
456 c->t_cpu [0] += time_cpu [0];
457}
458
459ecb_inline void
460coro_times_sub (struct coro *c)
461{
462 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
463 c->t_real [1] -= time_real [1];
464 c->t_real [0] -= time_real [0];
465
466 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
467 c->t_cpu [1] -= time_cpu [1];
468 c->t_cpu [0] -= time_cpu [0];
469}
470
471/*****************************************************************************/
472/* magic glue */
473
474#define CORO_MAGIC_type_cv 26
475#define CORO_MAGIC_type_state PERL_MAGIC_ext
476
477#define CORO_MAGIC_NN(sv, type) \
478 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
479 ? SvMAGIC (sv) \
480 : mg_find (sv, type))
481
482#define CORO_MAGIC(sv, type) \
483 (ecb_expect_true (SvMAGIC (sv)) \
484 ? CORO_MAGIC_NN (sv, type) \
485 : 0)
486
487#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
488#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
489
490ecb_inline MAGIC *
491SvSTATEhv_p (pTHX_ SV *coro)
492{
493 MAGIC *mg;
494
495 if (ecb_expect_true (
496 SvTYPE (coro) == SVt_PVHV
497 && (mg = CORO_MAGIC_state (coro))
498 && mg->mg_virtual == &coro_state_vtbl
499 ))
500 return mg;
501
502 return 0;
503}
504
505ecb_inline struct coro *
506SvSTATE_ (pTHX_ SV *coro)
507{
508 MAGIC *mg;
509
510 if (SvROK (coro))
511 coro = SvRV (coro);
512
513 mg = SvSTATEhv_p (aTHX_ coro);
514 if (!mg)
515 croak ("Coro::State object required");
516
517 return (struct coro *)mg->mg_ptr;
518}
519
520#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
521
522/* faster than SvSTATE, but expects a coroutine hv */
523#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
524#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
525
526/*****************************************************************************/
527/* padlist management and caching */
528
529ecb_inline AV *
171coro_clone_padlist (CV *cv) 530coro_derive_padlist (pTHX_ CV *cv)
172{ 531{
173 AV *padlist = CvPADLIST (cv); 532 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 533 AV *newpadlist, *newpad;
175 534
176 newpadlist = newAV (); 535 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 536 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 537#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 539#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 541#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 542 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 543 --AvFILLp (padlist);
185 544
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 545 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
187 av_store (newpadlist, 1, (SV *)newpad); 546 av_store (newpadlist, 1, (SV *)newpad);
188 547
189 return newpadlist; 548 return newpadlist;
190} 549}
191 550
192static void 551ecb_inline void
193free_padlist (AV *padlist) 552free_padlist (pTHX_ AV *padlist)
194{ 553{
195 /* may be during global destruction */ 554 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 555 if (!IN_DESTRUCT)
197 { 556 {
198 I32 i = AvFILLp (padlist); 557 I32 i = AvFILLp (padlist);
199 while (i >= 0) 558
559 while (i > 0) /* special-case index 0 */
200 { 560 {
201 SV **svp = av_fetch (padlist, i--, FALSE); 561 /* we try to be extra-careful here */
202 if (svp) 562 AV *av = (AV *)AvARRAY (padlist)[i--];
203 { 563 I32 j = AvFILLp (av);
204 SV *sv; 564
205 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 565 while (j >= 0)
566 SvREFCNT_dec (AvARRAY (av)[j--]);
567
568 AvFILLp (av) = -1;
206 SvREFCNT_dec (sv); 569 SvREFCNT_dec (av);
207
208 SvREFCNT_dec (*svp);
209 }
210 } 570 }
211 571
572 SvREFCNT_dec (AvARRAY (padlist)[0]);
573
574 AvFILLp (padlist) = -1;
212 SvREFCNT_dec ((SV*)padlist); 575 SvREFCNT_dec ((SV*)padlist);
213 } 576 }
214} 577}
215 578
216static int 579static int
217coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 580coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
218{ 581{
219 AV *padlist; 582 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 583 AV *av = (AV *)mg->mg_obj;
221 584
585 /* perl manages to free our internal AV and _then_ call us */
586 if (IN_DESTRUCT)
587 return 0;
588
222 /* casting is fun. */ 589 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 590 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 591 free_padlist (aTHX_ padlist);
225 592
226 SvREFCNT_dec (av); 593 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 594
228 return 0; 595 return 0;
229} 596}
230 597
231#define PERL_MAGIC_coro PERL_MAGIC_ext 598static MGVTBL coro_cv_vtbl = {
232 599 0, 0, 0, 0,
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 600 coro_cv_free
601};
234 602
235/* the next two functions merely cache the padlists */ 603/* the next two functions merely cache the padlists */
236static void 604ecb_inline void
237get_padlist (CV *cv) 605get_padlist (pTHX_ CV *cv)
238{ 606{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 607 MAGIC *mg = CORO_MAGIC_cv (cv);
608 AV *av;
240 609
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 610 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 611 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 612 else
244 { 613 {
245#if 0 614#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 615 /* this is probably cleaner? but also slower! */
616 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 617 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 618 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 619 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 620 SvREFCNT_dec (cp);
251#else 621#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 622 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 623#endif
254 } 624 }
255} 625}
256 626
257static void 627ecb_inline void
258put_padlist (CV *cv) 628put_padlist (pTHX_ CV *cv)
259{ 629{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 630 MAGIC *mg = CORO_MAGIC_cv (cv);
631 AV *av;
261 632
262 if (!mg) 633 if (ecb_expect_false (!mg))
634 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
635
636 av = (AV *)mg->mg_obj;
637
638 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
639 av_extend (av, AvFILLp (av) + 1);
640
641 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
642}
643
644/** load & save, init *******************************************************/
645
646/* swap sv heads, at least logically */
647static void
648swap_svs (pTHX_ Coro__State c)
649{
650 int i;
651
652 for (i = 0; i <= AvFILLp (c->swap_sv); )
653 {
654 SV *a = AvARRAY (c->swap_sv)[i++];
655 SV *b = AvARRAY (c->swap_sv)[i++];
656
657 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
658 SV tmp;
659
660 /* swap sv_any */
661 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
662
663 /* swap sv_flags */
664 SvFLAGS (&tmp) = SvFLAGS (a);
665 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
666 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
667
668#if PERL_VERSION_ATLEAST (5,10,0)
669 /* perl 5.10 complicates this _quite_ a bit, but it also is
670 * much faster, so no quarrels here. alternatively, we could
671 * sv_upgrade to avoid this.
672 */
263 { 673 {
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 674 /* swap sv_u */
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 675 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
266 mg->mg_virtual = &vtbl_coro; 676
267 mg->mg_obj = (SV *)newAV (); 677 /* if SvANY points to the head, we need to adjust the pointers,
678 * as the pointer for a still points to b, and maybe vice versa.
679 */
680 #define svany_in_head(type) \
681 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
682
683 if (svany_in_head (SvTYPE (a)))
684 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
685
686 if (svany_in_head (SvTYPE (b)))
687 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
268 } 688 }
269 689#endif
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 690 }
271} 691}
272 692
273#define SB do { 693#define SWAP_SVS(coro) \
274#define SE } while (0) 694 if (ecb_expect_false ((coro)->swap_sv)) \
695 swap_svs (aTHX_ (coro))
275 696
276#define LOAD(state) load_state((state));
277#define SAVE(state,flags) save_state((state),(flags));
278
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
280
281static void 697static void
698on_enterleave_call (pTHX_ SV *cb);
699
700static void
282load_state(Coro__State c) 701load_perl (pTHX_ Coro__State c)
283{ 702{
284 PL_dowarn = c->dowarn; 703 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 704 c->slot = 0;
286 705
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 706 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 707
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 708#if CORO_JIT
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 709 load_perl_slots (slot);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 710#else
711 #define VARx(name,expr,type) expr = slot->name;
712 # include "state.h"
713 #undef VARx
714#endif
321 715
322 { 716 {
323 dSP; 717 dSP;
718
324 CV *cv; 719 CV *cv;
325 720
326 /* now do the ugly restore mess */ 721 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 722 while (ecb_expect_true (cv = (CV *)POPs))
328 { 723 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 724 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 725 CvDEPTH (cv) = PTR2IV (POPs);
335 } 726 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 727 }
339 728
340 PUTBACK; 729 PUTBACK;
341 } 730 }
342}
343 731
732 slf_frame = c->slf_frame;
733 CORO_THROW = c->except;
734
735 if (ecb_expect_false (enable_times))
736 {
737 if (ecb_expect_false (!times_valid))
738 coro_times_update ();
739
740 coro_times_sub (c);
741 }
742
743 if (ecb_expect_false (c->on_enter))
744 {
745 int i;
746
747 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
748 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
749 }
750
751 SWAP_SVS (c);
752}
753
344static void 754static void
345save_state(Coro__State c, int flags) 755save_perl (pTHX_ Coro__State c)
346{ 756{
757 SWAP_SVS (c);
758
759 if (ecb_expect_false (c->on_leave))
760 {
761 int i;
762
763 for (i = AvFILLp (c->on_leave); i >= 0; --i)
764 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
765 }
766
767 times_valid = 0;
768
769 if (ecb_expect_false (enable_times))
770 {
771 coro_times_update (); times_valid = 1;
772 coro_times_add (c);
773 }
774
775 c->except = CORO_THROW;
776 c->slf_frame = slf_frame;
777
347 { 778 {
348 dSP; 779 dSP;
349 I32 cxix = cxstack_ix; 780 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 781 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 782 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 784 /*
354 * the worst thing you can imagine happens first - we have to save 785 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 786 * (and reinitialize) all cv's in the whole callchain :(
356 */ 787 */
357 788
358 PUSHs (Nullsv); 789 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 790 /* this loop was inspired by pp_caller */
360 for (;;) 791 for (;;)
361 { 792 {
362 while (cxix >= 0) 793 while (ecb_expect_true (cxix >= 0))
363 { 794 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 795 PERL_CONTEXT *cx = &ccstk[cxix--];
365 796
366 if (CxTYPE(cx) == CXt_SUB) 797 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 798 {
368 CV *cv = cx->blk_sub.cv; 799 CV *cv = cx->blk_sub.cv;
800
369 if (CvDEPTH(cv)) 801 if (ecb_expect_true (CvDEPTH (cv)))
370 { 802 {
371 EXTEND (SP, CvDEPTH(cv)*2); 803 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 804 PUSHs ((SV *)CvPADLIST (cv));
805 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 806 PUSHs ((SV *)cv);
382 807
808 CvDEPTH (cv) = 0;
383 get_padlist (cv); 809 get_padlist (aTHX_ cv);
384 } 810 }
385 } 811 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 812 }
395 813
396 if (top_si->si_type == PERLSI_MAIN) 814 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 815 break;
398 816
399 top_si = top_si->si_prev; 817 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 818 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 819 cxix = top_si->si_cxix;
402 } 820 }
403 821
404 PUTBACK; 822 PUTBACK;
405 } 823 }
406 824
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 825 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 826 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 827 {
828 unsigned int i;
410 829
411 c->dowarn = PL_dowarn; 830 for (i = 0; i < SLOT_COUNT; ++i)
412 c->in_eval = PL_in_eval; 831 CXINC;
413 832
414 c->curstackinfo = PL_curstackinfo; 833 cxstack_ix -= SLOT_COUNT; /* undo allocation */
415 c->curstack = PL_curstack; 834 }
835
416 c->mainstack = PL_mainstack; 836 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 837
418 c->op = PL_op; 838 {
419 c->curpad = PL_curpad; 839 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 840
421 c->compcv = PL_compcv; 841#if CORO_JIT
422 c->stack_base = PL_stack_base; 842 save_perl_slots (slot);
423 c->stack_max = PL_stack_max; 843#else
424 c->tmps_stack = PL_tmps_stack; 844 #define VARx(name,expr,type) slot->name = expr;
425 c->tmps_floor = PL_tmps_floor; 845 # include "state.h"
426 c->tmps_ix = PL_tmps_ix; 846 #undef VARx
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif 847#endif
442 c->curpm = PL_curpm; 848 }
443 c->curcop = PL_curcop;
444} 849}
445 850
446/* 851/*
447 * allocate various perl stacks. This is an exact copy 852 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 853 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 854 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 855 * not usually need a lot of stackspace.
451 */ 856 */
857#if CORO_PREFER_PERL_FUNCTIONS
858# define coro_init_stacks(thx) init_stacks ()
859#else
452static void 860static void
453coro_init_stacks () 861coro_init_stacks (pTHX)
454{ 862{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 863 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
456 PL_curstackinfo->si_type = PERLSI_MAIN; 864 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 865 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 866 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 867
460 PL_stack_base = AvARRAY(PL_curstack); 868 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 869 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 870 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 871
464 New(50,PL_tmps_stack,96,SV*); 872 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 873 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 874 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 875 PL_tmps_max = 32;
468 876
469 New(54,PL_markstack,16,I32); 877 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 878 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 879 PL_markstack_max = PL_markstack + 16;
472 880
473#ifdef SET_MARK_OFFSET 881#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 882 SET_MARK_OFFSET;
475#endif 883#endif
476 884
477 New(54,PL_scopestack,16,I32); 885 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 886 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 887 PL_scopestack_max = 8;
888#if HAS_SCOPESTACK_NAME
889 New(54,PL_scopestack_name,8,const char*);
890#endif
480 891
481 New(54,PL_savestack,96,ANY); 892 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 893 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 894 PL_savestack_max = 24;
484 895
485#if !PERL_VERSION_ATLEAST (5,9,0) 896#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 897 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 898 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 899 PL_retstack_max = 4;
489#endif 900#endif
490} 901}
902#endif
491 903
492/* 904/*
493 * destroy the stacks, the callchain etc... 905 * destroy the stacks, the callchain etc...
494 */ 906 */
495static void 907static void
496destroy_stacks() 908coro_destruct_stacks (pTHX)
497{ 909{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 910 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 911 PL_curstackinfo = PL_curstackinfo->si_next;
511 912
512 while (PL_curstackinfo) 913 while (PL_curstackinfo)
513 { 914 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 915 PERL_SI *p = PL_curstackinfo->si_prev;
515 916
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 917 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 918 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 919
528 Safefree (PL_curstackinfo->si_cxstack); 920 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 921 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 922 PL_curstackinfo = p;
531 } 923 }
532 924
533 Safefree (PL_tmps_stack); 925 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 926 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 927 Safefree (PL_scopestack);
928#if HAS_SCOPESTACK_NAME
929 Safefree (PL_scopestack_name);
930#endif
536 Safefree (PL_savestack); 931 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 932#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 933 Safefree (PL_retstack);
539#endif 934#endif
540} 935}
541 936
937#define CORO_RSS \
938 rss += sizeof (SYM (curstackinfo)); \
939 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
940 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
941 rss += SYM (tmps_max) * sizeof (SV *); \
942 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
943 rss += SYM (scopestack_max) * sizeof (I32); \
944 rss += SYM (savestack_max) * sizeof (ANY);
945
946static size_t
947coro_rss (pTHX_ struct coro *coro)
948{
949 size_t rss = sizeof (*coro);
950
951 if (coro->mainstack)
952 {
953 if (coro->flags & CF_RUNNING)
954 {
955 #define SYM(sym) PL_ ## sym
956 CORO_RSS;
957 #undef SYM
958 }
959 else
960 {
961 #define SYM(sym) coro->slot->sym
962 CORO_RSS;
963 #undef SYM
964 }
965 }
966
967 return rss;
968}
969
970/** coroutine stack handling ************************************************/
971
972static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
973static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
974static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
975
976/* apparently < 5.8.8 */
977#ifndef MgPV_nolen_const
978#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
979 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
980 (const char*)(mg)->mg_ptr)
981#endif
982
983/*
984 * This overrides the default magic get method of %SIG elements.
985 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
986 * and instead of trying to save and restore the hash elements (extremely slow),
987 * we just provide our own readback here.
988 */
989static int ecb_cold
990coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
991{
992 const char *s = MgPV_nolen_const (mg);
993
994 if (*s == '_')
995 {
996 SV **svp = 0;
997
998 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
999 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1000
1001 if (svp)
1002 {
1003 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
1004 return 0;
1005 }
1006 }
1007
1008 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1009}
1010
1011static int ecb_cold
1012coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *old = *svp;
1026 *svp = 0;
1027 SvREFCNT_dec (old);
1028 return 0;
1029 }
1030 }
1031
1032 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1033}
1034
1035static int ecb_cold
1036coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1037{
1038 const char *s = MgPV_nolen_const (mg);
1039
1040 if (*s == '_')
1041 {
1042 SV **svp = 0;
1043
1044 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1045 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1046
1047 if (svp)
1048 {
1049 SV *old = *svp;
1050 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1051 SvREFCNT_dec (old);
1052 return 0;
1053 }
1054 }
1055
1056 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1057}
1058
1059static void
1060prepare_nop (pTHX_ struct coro_transfer_args *ta)
1061{
1062 /* kind of mega-hacky, but works */
1063 ta->next = ta->prev = (struct coro *)ta;
1064}
1065
542static void 1066static int
543setup_coro (struct coro *coro) 1067slf_check_nop (pTHX_ struct CoroSLF *frame)
1068{
1069 return 0;
1070}
1071
1072static int
1073slf_check_repeat (pTHX_ struct CoroSLF *frame)
1074{
1075 return 1;
1076}
1077
1078static UNOP init_perl_op;
1079
1080ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1081init_perl (pTHX_ struct coro *coro)
544{ 1082{
545 /* 1083 /*
546 * emulate part of the perl startup here. 1084 * emulate part of the perl startup here.
547 */ 1085 */
1086 coro_init_stacks (aTHX);
1087
1088 PL_runops = RUNOPS_DEFAULT;
1089 PL_curcop = &PL_compiling;
1090 PL_in_eval = EVAL_NULL;
1091 PL_comppad = 0;
1092 PL_comppad_name = 0;
1093 PL_comppad_name_fill = 0;
1094 PL_comppad_name_floor = 0;
1095 PL_curpm = 0;
1096 PL_curpad = 0;
1097 PL_localizing = 0;
1098 PL_restartop = 0;
1099#if PERL_VERSION_ATLEAST (5,10,0)
1100 PL_parser = 0;
1101#endif
1102 PL_hints = 0;
1103
1104 /* recreate the die/warn hooks */
1105 PL_diehook = SvREFCNT_inc (rv_diehook);
1106 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1107
1108 GvSV (PL_defgv) = newSV (0);
1109 GvAV (PL_defgv) = coro->args; coro->args = 0;
1110 GvSV (PL_errgv) = newSV (0);
1111 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1112 GvHV (PL_hintgv) = 0;
1113 PL_rs = newSVsv (GvSV (irsgv));
1114 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1115
1116 {
1117 dSP;
1118 UNOP myop;
1119
1120 Zero (&myop, 1, UNOP);
1121 myop.op_next = Nullop;
1122 myop.op_type = OP_ENTERSUB;
1123 myop.op_flags = OPf_WANT_VOID;
1124
1125 PUSHMARK (SP);
1126 PUSHs ((SV *)coro->startcv);
1127 PUTBACK;
1128 PL_op = (OP *)&myop;
1129 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1130 }
1131
1132 /* this newly created coroutine might be run on an existing cctx which most
1133 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1134 */
1135 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1136 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1137 slf_frame.destroy = 0;
1138
1139 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1140 init_perl_op.op_next = PL_op;
1141 init_perl_op.op_type = OP_ENTERSUB;
1142 init_perl_op.op_ppaddr = pp_slf;
1143 /* no flags etc. required, as an init function won't be called */
1144
1145 PL_op = (OP *)&init_perl_op;
1146
1147 /* copy throw, in case it was set before init_perl */
1148 CORO_THROW = coro->except;
1149
1150 SWAP_SVS (coro);
1151
1152 if (ecb_expect_false (enable_times))
1153 {
1154 coro_times_update ();
1155 coro_times_sub (coro);
1156 }
1157}
1158
1159static void
1160coro_unwind_stacks (pTHX)
1161{
1162 if (!IN_DESTRUCT)
1163 {
1164 /* restore all saved variables and stuff */
1165 LEAVE_SCOPE (0);
1166 assert (PL_tmps_floor == -1);
1167
1168 /* free all temporaries */
1169 FREETMPS;
1170 assert (PL_tmps_ix == -1);
1171
1172 /* unwind all extra stacks */
1173 POPSTACK_TO (PL_mainstack);
1174
1175 /* unwind main stack */
1176 dounwind (-1);
1177 }
1178}
1179
1180static void
1181destroy_perl (pTHX_ struct coro *coro)
1182{
1183 SV *svf [9];
1184
1185 {
1186 SV *old_current = SvRV (coro_current);
1187 struct coro *current = SvSTATE (old_current);
1188
1189 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1190
1191 save_perl (aTHX_ current);
1192
1193 /* this will cause transfer_check to croak on block*/
1194 SvRV_set (coro_current, (SV *)coro->hv);
1195
1196 load_perl (aTHX_ coro);
1197
1198 coro_unwind_stacks (aTHX);
1199
1200 /* restore swapped sv's */
1201 SWAP_SVS (coro);
1202
1203 coro_destruct_stacks (aTHX);
1204
1205 /* now save some sv's to be free'd later */
1206 svf [0] = GvSV (PL_defgv);
1207 svf [1] = (SV *)GvAV (PL_defgv);
1208 svf [2] = GvSV (PL_errgv);
1209 svf [3] = (SV *)PL_defoutgv;
1210 svf [4] = PL_rs;
1211 svf [5] = GvSV (irsgv);
1212 svf [6] = (SV *)GvHV (PL_hintgv);
1213 svf [7] = PL_diehook;
1214 svf [8] = PL_warnhook;
1215 assert (9 == sizeof (svf) / sizeof (*svf));
1216
1217 SvRV_set (coro_current, old_current);
1218
1219 load_perl (aTHX_ current);
1220 }
1221
1222 {
1223 unsigned int i;
1224
1225 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1226 SvREFCNT_dec (svf [i]);
1227
1228 SvREFCNT_dec (coro->saved_deffh);
1229 SvREFCNT_dec (coro->rouse_cb);
1230 SvREFCNT_dec (coro->invoke_cb);
1231 SvREFCNT_dec (coro->invoke_av);
1232 }
1233}
1234
1235ecb_inline void
1236free_coro_mortal (pTHX)
1237{
1238 if (ecb_expect_true (coro_mortal))
1239 {
1240 SvREFCNT_dec ((SV *)coro_mortal);
1241 coro_mortal = 0;
1242 }
1243}
1244
1245static int
1246runops_trace (pTHX)
1247{
1248 COP *oldcop = 0;
1249 int oldcxix = -2;
1250
1251 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1252 {
1253 PERL_ASYNC_CHECK ();
1254
1255 if (cctx_current->flags & CC_TRACE_ALL)
1256 {
1257 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1258 {
1259 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1260 SV **bot, **top;
1261 AV *av = newAV (); /* return values */
1262 SV **cb;
1263 dSP;
1264
1265 GV *gv = CvGV (cx->blk_sub.cv);
1266 SV *fullname = sv_2mortal (newSV (0));
1267 if (isGV (gv))
1268 gv_efullname3 (fullname, gv, 0);
1269
1270 bot = PL_stack_base + cx->blk_oldsp + 1;
1271 top = cx->blk_gimme == G_ARRAY ? SP + 1
1272 : cx->blk_gimme == G_SCALAR ? bot + 1
1273 : bot;
1274
1275 av_extend (av, top - bot);
1276 while (bot < top)
1277 av_push (av, SvREFCNT_inc_NN (*bot++));
1278
1279 PL_runops = RUNOPS_DEFAULT;
1280 ENTER;
1281 SAVETMPS;
1282 EXTEND (SP, 3);
1283 PUSHMARK (SP);
1284 PUSHs (&PL_sv_no);
1285 PUSHs (fullname);
1286 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1287 PUTBACK;
1288 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1289 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1290 SPAGAIN;
1291 FREETMPS;
1292 LEAVE;
1293 PL_runops = runops_trace;
1294 }
1295
1296 if (oldcop != PL_curcop)
1297 {
1298 oldcop = PL_curcop;
1299
1300 if (PL_curcop != &PL_compiling)
1301 {
1302 SV **cb;
1303
1304 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1305 {
1306 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1307
1308 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1309 {
1310 dSP;
1311 GV *gv = CvGV (cx->blk_sub.cv);
1312 SV *fullname = sv_2mortal (newSV (0));
1313
1314 if (isGV (gv))
1315 gv_efullname3 (fullname, gv, 0);
1316
1317 PL_runops = RUNOPS_DEFAULT;
1318 ENTER;
1319 SAVETMPS;
1320 EXTEND (SP, 3);
1321 PUSHMARK (SP);
1322 PUSHs (&PL_sv_yes);
1323 PUSHs (fullname);
1324 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1325 PUTBACK;
1326 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1327 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1328 SPAGAIN;
1329 FREETMPS;
1330 LEAVE;
1331 PL_runops = runops_trace;
1332 }
1333
1334 oldcxix = cxstack_ix;
1335 }
1336
1337 if (cctx_current->flags & CC_TRACE_LINE)
1338 {
1339 dSP;
1340
1341 PL_runops = RUNOPS_DEFAULT;
1342 ENTER;
1343 SAVETMPS;
1344 EXTEND (SP, 3);
1345 PL_runops = RUNOPS_DEFAULT;
1346 PUSHMARK (SP);
1347 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1348 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1349 PUTBACK;
1350 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1351 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1352 SPAGAIN;
1353 FREETMPS;
1354 LEAVE;
1355 PL_runops = runops_trace;
1356 }
1357 }
1358 }
1359 }
1360 }
1361
1362 TAINT_NOT;
1363 return 0;
1364}
1365
1366static struct CoroSLF cctx_ssl_frame;
1367
1368static void
1369slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1370{
1371 ta->prev = 0;
1372}
1373
1374static int
1375slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1376{
1377 *frame = cctx_ssl_frame;
1378
1379 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1380}
1381
1382/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1383static void ecb_noinline
1384cctx_prepare (pTHX)
1385{
1386 PL_top_env = &PL_start_env;
1387
1388 if (cctx_current->flags & CC_TRACE)
1389 PL_runops = runops_trace;
1390
1391 /* we already must be executing an SLF op, there is no other valid way
1392 * that can lead to creation of a new cctx */
1393 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1394 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1395
1396 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1397 cctx_ssl_frame = slf_frame;
1398
1399 slf_frame.prepare = slf_prepare_set_stacklevel;
1400 slf_frame.check = slf_check_set_stacklevel;
1401}
1402
1403/* the tail of transfer: execute stuff we can only do after a transfer */
1404ecb_inline void
1405transfer_tail (pTHX)
1406{
1407 free_coro_mortal (aTHX);
1408}
1409
1410/*
1411 * this is a _very_ stripped down perl interpreter ;)
1412 */
1413static void
1414cctx_run (void *arg)
1415{
1416#ifdef USE_ITHREADS
1417# if CORO_PTHREAD
1418 PERL_SET_CONTEXT (coro_thx);
1419# endif
1420#endif
1421 {
1422 dTHX;
1423
1424 /* normally we would need to skip the entersub here */
1425 /* not doing so will re-execute it, which is exactly what we want */
1426 /* PL_nop = PL_nop->op_next */
1427
1428 /* inject a fake subroutine call to cctx_init */
1429 cctx_prepare (aTHX);
1430
1431 /* cctx_run is the alternative tail of transfer() */
1432 transfer_tail (aTHX);
1433
1434 /* somebody or something will hit me for both perl_run and PL_restartop */
1435 PL_restartop = PL_op;
1436 perl_run (PL_curinterp);
1437 /*
1438 * Unfortunately, there is no way to get at the return values of the
1439 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1440 * runtime errors here, as this is just a random interpreter, not a thread.
1441 */
1442
1443 /*
1444 * If perl-run returns we assume exit() was being called or the coro
1445 * fell off the end, which seems to be the only valid (non-bug)
1446 * reason for perl_run to return. We try to exit by jumping to the
1447 * bootstrap-time "top" top_env, as we cannot restore the "main"
1448 * coroutine as Coro has no such concept.
1449 * This actually isn't valid with the pthread backend, but OSes requiring
1450 * that backend are too broken to do it in a standards-compliant way.
1451 */
1452 PL_top_env = main_top_env;
1453 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1454 }
1455}
1456
1457static coro_cctx *
1458cctx_new (void)
1459{
1460 coro_cctx *cctx;
1461
1462 ++cctx_count;
1463 New (0, cctx, 1, coro_cctx);
1464
1465 cctx->gen = cctx_gen;
1466 cctx->flags = 0;
1467 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1468
1469 return cctx;
1470}
1471
1472/* create a new cctx only suitable as source */
1473static coro_cctx *
1474cctx_new_empty (void)
1475{
1476 coro_cctx *cctx = cctx_new ();
1477
1478 cctx->sptr = 0;
1479 coro_create (&cctx->cctx, 0, 0, 0, 0);
1480
1481 return cctx;
1482}
1483
1484/* create a new cctx suitable as destination/running a perl interpreter */
1485static coro_cctx *
1486cctx_new_run (void)
1487{
1488 coro_cctx *cctx = cctx_new ();
1489 void *stack_start;
1490 size_t stack_size;
1491
1492#if HAVE_MMAP
1493 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1494 /* mmap supposedly does allocate-on-write for us */
1495 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
1496
1497 if (cctx->sptr != (void *)-1)
1498 {
1499 #if CORO_STACKGUARD
1500 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1501 #endif
1502 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1503 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1504 cctx->flags |= CC_MAPPED;
1505 }
1506 else
1507#endif
1508 {
1509 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1510 New (0, cctx->sptr, cctx_stacksize, long);
1511
1512 if (!cctx->sptr)
1513 {
1514 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1515 _exit (EXIT_FAILURE);
1516 }
1517
1518 stack_start = cctx->sptr;
1519 stack_size = cctx->ssize;
1520 }
1521
1522 #if CORO_USE_VALGRIND
1523 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1524 #endif
1525
1526 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1527
1528 return cctx;
1529}
1530
1531static void
1532cctx_destroy (coro_cctx *cctx)
1533{
1534 if (!cctx)
1535 return;
1536
1537 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1538
1539 --cctx_count;
1540 coro_destroy (&cctx->cctx);
1541
1542 /* coro_transfer creates new, empty cctx's */
1543 if (cctx->sptr)
1544 {
1545 #if CORO_USE_VALGRIND
1546 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1547 #endif
1548
1549#if HAVE_MMAP
1550 if (cctx->flags & CC_MAPPED)
1551 munmap (cctx->sptr, cctx->ssize);
1552 else
1553#endif
1554 Safefree (cctx->sptr);
1555 }
1556
1557 Safefree (cctx);
1558}
1559
1560/* wether this cctx should be destructed */
1561#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1562
1563static coro_cctx *
1564cctx_get (pTHX)
1565{
1566 while (ecb_expect_true (cctx_first))
1567 {
1568 coro_cctx *cctx = cctx_first;
1569 cctx_first = cctx->next;
1570 --cctx_idle;
1571
1572 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1573 return cctx;
1574
1575 cctx_destroy (cctx);
1576 }
1577
1578 return cctx_new_run ();
1579}
1580
1581static void
1582cctx_put (coro_cctx *cctx)
1583{
1584 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1585
1586 /* free another cctx if overlimit */
1587 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1588 {
1589 coro_cctx *first = cctx_first;
1590 cctx_first = first->next;
1591 --cctx_idle;
1592
1593 cctx_destroy (first);
1594 }
1595
1596 ++cctx_idle;
1597 cctx->next = cctx_first;
1598 cctx_first = cctx;
1599}
1600
1601/** coroutine switching *****************************************************/
1602
1603static void
1604transfer_check (pTHX_ struct coro *prev, struct coro *next)
1605{
1606 /* TODO: throwing up here is considered harmful */
1607
1608 if (ecb_expect_true (prev != next))
1609 {
1610 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1611 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1612
1613 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1614 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1615
1616#if !PERL_VERSION_ATLEAST (5,10,0)
1617 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1618 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1619#endif
1620 }
1621}
1622
1623/* always use the TRANSFER macro */
1624static void ecb_noinline /* noinline so we have a fixed stackframe */
1625transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1626{
1627 dSTACKLEVEL;
1628
1629 /* sometimes transfer is only called to set idle_sp */
1630 if (ecb_expect_false (!prev))
1631 {
1632 cctx_current->idle_sp = STACKLEVEL;
1633 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1634 }
1635 else if (ecb_expect_true (prev != next))
1636 {
1637 coro_cctx *cctx_prev;
1638
1639 if (ecb_expect_false (prev->flags & CF_NEW))
1640 {
1641 /* create a new empty/source context */
1642 prev->flags &= ~CF_NEW;
1643 prev->flags |= CF_RUNNING;
1644 }
1645
1646 prev->flags &= ~CF_RUNNING;
1647 next->flags |= CF_RUNNING;
1648
1649 /* first get rid of the old state */
1650 save_perl (aTHX_ prev);
1651
1652 if (ecb_expect_false (next->flags & CF_NEW))
1653 {
1654 /* need to start coroutine */
1655 next->flags &= ~CF_NEW;
1656 /* setup coroutine call */
1657 init_perl (aTHX_ next);
1658 }
1659 else
1660 load_perl (aTHX_ next);
1661
1662 /* possibly untie and reuse the cctx */
1663 if (ecb_expect_true (
1664 cctx_current->idle_sp == STACKLEVEL
1665 && !(cctx_current->flags & CC_TRACE)
1666 && !force_cctx
1667 ))
1668 {
1669 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1670 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1671
1672 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1673 /* without this the next cctx_get might destroy the running cctx while still in use */
1674 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1675 if (ecb_expect_true (!next->cctx))
1676 next->cctx = cctx_get (aTHX);
1677
1678 cctx_put (cctx_current);
1679 }
1680 else
1681 prev->cctx = cctx_current;
1682
1683 ++next->usecount;
1684
1685 cctx_prev = cctx_current;
1686 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1687
1688 next->cctx = 0;
1689
1690 if (ecb_expect_false (cctx_prev != cctx_current))
1691 {
1692 cctx_prev->top_env = PL_top_env;
1693 PL_top_env = cctx_current->top_env;
1694 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1695 }
1696
1697 transfer_tail (aTHX);
1698 }
1699}
1700
1701#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1702#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1703
1704/** high level stuff ********************************************************/
1705
1706/* this function is actually Coro, not Coro::State, but we call it from here */
1707/* because it is convenient - but it hasn't been declared yet for that reason */
1708static void
1709coro_call_on_destroy (pTHX_ struct coro *coro);
1710
1711static void
1712coro_state_destroy (pTHX_ struct coro *coro)
1713{
1714 if (coro->flags & CF_ZOMBIE)
1715 return;
1716
1717 slf_destroy (aTHX_ coro);
1718
1719 coro->flags |= CF_ZOMBIE;
1720
1721 if (coro->flags & CF_READY)
1722 {
1723 /* reduce nready, as destroying a ready coro effectively unreadies it */
1724 /* alternative: look through all ready queues and remove the coro */
1725 --coro_nready;
1726 }
1727 else
1728 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1729
1730 if (coro->next) coro->next->prev = coro->prev;
1731 if (coro->prev) coro->prev->next = coro->next;
1732 if (coro == coro_first) coro_first = coro->next;
1733
1734 if (coro->mainstack
1735 && coro->mainstack != main_mainstack
1736 && coro->slot
1737 && !PL_dirty)
1738 destroy_perl (aTHX_ coro);
1739
1740 cctx_destroy (coro->cctx);
1741 SvREFCNT_dec (coro->startcv);
1742 SvREFCNT_dec (coro->args);
1743 SvREFCNT_dec (coro->swap_sv);
1744 SvREFCNT_dec (CORO_THROW);
1745
1746 coro_call_on_destroy (aTHX_ coro);
1747
1748 /* more destruction mayhem in coro_state_free */
1749}
1750
1751static int
1752coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1753{
1754 struct coro *coro = (struct coro *)mg->mg_ptr;
1755 mg->mg_ptr = 0;
1756
1757 coro_state_destroy (aTHX_ coro);
1758 SvREFCNT_dec (coro->on_destroy);
1759 SvREFCNT_dec (coro->status);
1760
1761 Safefree (coro);
1762
1763 return 0;
1764}
1765
1766static int ecb_cold
1767coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1768{
1769 /* called when perl clones the current process the slow way (windows process emulation) */
1770 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1771 mg->mg_ptr = 0;
1772 mg->mg_virtual = 0;
1773
1774 return 0;
1775}
1776
1777static MGVTBL coro_state_vtbl = {
1778 0, 0, 0, 0,
1779 coro_state_free,
1780 0,
1781#ifdef MGf_DUP
1782 coro_state_dup,
1783#else
1784# define MGf_DUP 0
1785#endif
1786};
1787
1788static void
1789prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1790{
1791 ta->prev = SvSTATE (prev_sv);
1792 ta->next = SvSTATE (next_sv);
1793 TRANSFER_CHECK (*ta);
1794}
1795
1796static void
1797api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1798{
1799 struct coro_transfer_args ta;
1800
1801 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1802 TRANSFER (ta, 1);
1803}
1804
1805/** Coro ********************************************************************/
1806
1807ecb_inline void
1808coro_enq (pTHX_ struct coro *coro)
1809{
1810 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1811
1812 SvREFCNT_inc_NN (coro->hv);
1813
1814 coro->next_ready = 0;
1815 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1816 ready [1] = coro;
1817}
1818
1819ecb_inline struct coro *
1820coro_deq (pTHX)
1821{
1822 int prio;
1823
1824 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1825 {
1826 struct coro **ready = coro_ready [prio];
1827
1828 if (ready [0])
1829 {
1830 struct coro *coro = ready [0];
1831 ready [0] = coro->next_ready;
1832 return coro;
1833 }
1834 }
1835
1836 return 0;
1837}
1838
1839static void
1840invoke_sv_ready_hook_helper (void)
1841{
548 dTHX; 1842 dTHX;
549 dSP; 1843 dSP;
550 UNOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1844
553 coro_init_stacks (); 1845 ENTER;
554 /*PL_curcop = 0;*/ 1846 SAVETMPS;
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1847
559 SPAGAIN;
560
561 Zero (&myop, 1, UNOP);
562 myop.op_next = Nullop;
563 myop.op_flags = OPf_WANT_VOID;
564
565 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP); 1848 PUSHMARK (SP);
568 XPUSHs (sub_init);
569 PUTBACK; 1849 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1850 call_sv (coro_readyhook, G_VOID | G_DISCARD);
571 SPAGAIN;
572 1851
573 ENTER; /* necessary e.g. for dounwind */ 1852 FREETMPS;
1853 LEAVE;
574} 1854}
575 1855
576static void 1856static int
577free_coro_mortal () 1857api_ready (pTHX_ SV *coro_sv)
578{ 1858{
579 if (coro_mortal) 1859 struct coro *coro = SvSTATE (coro_sv);
580 {
581 SvREFCNT_dec (coro_mortal);
582 coro_mortal = 0;
583 }
584}
585 1860
586static void NOINLINE 1861 if (coro->flags & CF_READY)
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return; 1862 return 0;
669 1863
670#if HAVE_MMAP 1864 coro->flags |= CF_READY;
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675 1865
676 Safefree (stack); 1866 coro_enq (aTHX_ coro);
677}
678 1867
679static coro_stack *stack_first; 1868 if (!coro_nready++)
1869 if (coroapi.readyhook)
1870 coroapi.readyhook ();
680 1871
681static coro_stack * 1872 return 1;
682stack_get () 1873}
683{
684 coro_stack *stack;
685 1874
686 if (stack_first) 1875static int
687 { 1876api_is_ready (pTHX_ SV *coro_sv)
688 stack = stack_first; 1877{
689 stack_first = stack->next; 1878 return !!(SvSTATE (coro_sv)->flags & CF_READY);
690 } 1879}
691 else 1880
1881/* expects to own a reference to next->hv */
1882ecb_inline void
1883prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1884{
1885 SV *prev_sv = SvRV (coro_current);
1886
1887 ta->prev = SvSTATE_hv (prev_sv);
1888 ta->next = next;
1889
1890 TRANSFER_CHECK (*ta);
1891
1892 SvRV_set (coro_current, (SV *)next->hv);
1893
1894 free_coro_mortal (aTHX);
1895 coro_mortal = prev_sv;
1896}
1897
1898static void
1899prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1900{
1901 for (;;)
692 { 1902 {
693 stack = stack_new (); 1903 struct coro *next = coro_deq (aTHX);
694 PL_op = PL_op->op_next;
695 }
696 1904
697 return stack; 1905 if (ecb_expect_true (next))
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags)
710{
711 dSTACKLEVEL;
712
713 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL)
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
716 else if (prev != next)
717 {
718 coro_stack *prev__stack;
719
720 LOCK;
721
722 if (next->mainstack)
723 { 1906 {
724 /* coroutine already started */ 1907 /* cannot transfer to destroyed coros, skip and look for next */
725 SAVE (prev, flags); 1908 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
726 LOAD (next); 1909 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1910 else
1911 {
1912 next->flags &= ~CF_READY;
1913 --coro_nready;
1914
1915 prepare_schedule_to (aTHX_ ta, next);
1916 break;
1917 }
727 } 1918 }
728 else 1919 else
729 { 1920 {
730 /* need to start coroutine */ 1921 /* nothing to schedule: call the idle handler */
731 /* first get rid of the old state */ 1922 if (SvROK (sv_idle)
732 SAVE (prev, -1); 1923 && SvOBJECT (SvRV (sv_idle)))
733 /* setup coroutine call */ 1924 {
734 setup_coro (next); 1925 if (SvRV (sv_idle) == SvRV (coro_current))
735 /* need a stack */ 1926 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
736 next->stack = 0; 1927
1928 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1929 api_ready (aTHX_ SvRV (sv_idle));
1930 --coro_nready;
1931 }
1932 else
1933 {
1934 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1935 dSP;
1936
1937 ENTER;
1938 SAVETMPS;
1939
1940 PUSHMARK (SP);
1941 PUTBACK;
1942 call_sv (sv_idle, G_VOID | G_DISCARD);
1943
1944 FREETMPS;
1945 LEAVE;
1946 }
737 } 1947 }
1948 }
1949}
738 1950
739 if (!prev->stack) 1951ecb_inline void
740 /* create a new empty context */ 1952prepare_cede (pTHX_ struct coro_transfer_args *ta)
741 Newz (0, prev->stack, 1, coro_stack); 1953{
1954 api_ready (aTHX_ coro_current);
1955 prepare_schedule (aTHX_ ta);
1956}
742 1957
743 prev__stack = prev->stack; 1958ecb_inline void
1959prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1960{
1961 SV *prev = SvRV (coro_current);
744 1962
745 /* possibly "free" the stack */ 1963 if (coro_nready)
746 if (prev__stack->idle_sp == STACKLEVEL) 1964 {
1965 prepare_schedule (aTHX_ ta);
1966 api_ready (aTHX_ prev);
1967 }
1968 else
1969 prepare_nop (aTHX_ ta);
1970}
1971
1972static void
1973api_schedule (pTHX)
1974{
1975 struct coro_transfer_args ta;
1976
1977 prepare_schedule (aTHX_ &ta);
1978 TRANSFER (ta, 1);
1979}
1980
1981static void
1982api_schedule_to (pTHX_ SV *coro_sv)
1983{
1984 struct coro_transfer_args ta;
1985 struct coro *next = SvSTATE (coro_sv);
1986
1987 SvREFCNT_inc_NN (coro_sv);
1988 prepare_schedule_to (aTHX_ &ta, next);
1989}
1990
1991static int
1992api_cede (pTHX)
1993{
1994 struct coro_transfer_args ta;
1995
1996 prepare_cede (aTHX_ &ta);
1997
1998 if (ecb_expect_true (ta.prev != ta.next))
1999 {
2000 TRANSFER (ta, 1);
2001 return 1;
2002 }
2003 else
2004 return 0;
2005}
2006
2007static int
2008api_cede_notself (pTHX)
2009{
2010 if (coro_nready)
2011 {
2012 struct coro_transfer_args ta;
2013
2014 prepare_cede_notself (aTHX_ &ta);
2015 TRANSFER (ta, 1);
2016 return 1;
2017 }
2018 else
2019 return 0;
2020}
2021
2022static void
2023api_trace (pTHX_ SV *coro_sv, int flags)
2024{
2025 struct coro *coro = SvSTATE (coro_sv);
2026
2027 if (coro->flags & CF_RUNNING)
2028 croak ("cannot enable tracing on a running coroutine, caught");
2029
2030 if (flags & CC_TRACE)
2031 {
2032 if (!coro->cctx)
2033 coro->cctx = cctx_new_run ();
2034 else if (!(coro->cctx->flags & CC_TRACE))
2035 croak ("cannot enable tracing on coroutine with custom stack, caught");
2036
2037 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2038 }
2039 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2040 {
2041 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2042
2043 if (coro->flags & CF_RUNNING)
2044 PL_runops = RUNOPS_DEFAULT;
2045 else
2046 coro->slot->runops = RUNOPS_DEFAULT;
2047 }
2048}
2049
2050static void
2051coro_push_av (pTHX_ AV *av, I32 gimme_v)
2052{
2053 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2054 {
2055 dSP;
2056
2057 if (gimme_v == G_SCALAR)
2058 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2059 else
747 { 2060 {
748 stack_put (prev__stack); 2061 int i;
749 prev->stack = 0; 2062 EXTEND (SP, AvFILLp (av) + 1);
2063
2064 for (i = 0; i <= AvFILLp (av); ++i)
2065 PUSHs (AvARRAY (av)[i]);
750 } 2066 }
751 2067
752 if (!next->stack) 2068 PUTBACK;
753 next->stack = stack_get (); 2069 }
2070}
754 2071
755 if (prev__stack != next->stack) 2072static void
2073coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2074{
2075 if (!coro->on_destroy)
2076 coro->on_destroy = newAV ();
2077
2078 av_push (coro->on_destroy, cb);
2079}
2080
2081static void
2082slf_destroy_join (pTHX_ struct CoroSLF *frame)
2083{
2084 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2085}
2086
2087static int
2088slf_check_join (pTHX_ struct CoroSLF *frame)
2089{
2090 struct coro *coro = (struct coro *)frame->data;
2091
2092 if (!coro->status)
2093 return 1;
2094
2095 frame->destroy = 0;
2096
2097 coro_push_av (aTHX_ coro->status, GIMME_V);
2098
2099 SvREFCNT_dec ((SV *)coro->hv);
2100
2101 return 0;
2102}
2103
2104static void
2105slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2108
2109 if (items > 1)
2110 croak ("join called with too many arguments");
2111
2112 if (coro->status)
2113 frame->prepare = prepare_nop;
2114 else
2115 {
2116 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2117 frame->prepare = prepare_schedule;
2118 }
2119
2120 frame->check = slf_check_join;
2121 frame->destroy = slf_destroy_join;
2122 frame->data = (void *)coro;
2123 SvREFCNT_inc (coro->hv);
2124}
2125
2126static void
2127coro_call_on_destroy (pTHX_ struct coro *coro)
2128{
2129 AV *od = coro->on_destroy;
2130
2131 if (!od)
2132 return;
2133
2134 while (AvFILLp (od) >= 0)
2135 {
2136 SV *cb = sv_2mortal (av_pop (od));
2137
2138 /* coro hv's (and only hv's at the moment) are supported as well */
2139 if (SvSTATEhv_p (aTHX_ cb))
2140 api_ready (aTHX_ cb);
2141 else
756 { 2142 {
757 prev__stack->top_env = PL_top_env; 2143 dSP; /* don't disturb outer sp */
758 PL_top_env = next->stack->top_env; 2144 PUSHMARK (SP);
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2145
2146 if (coro->status)
2147 {
2148 PUTBACK;
2149 coro_push_av (aTHX_ coro->status, G_ARRAY);
2150 SPAGAIN;
2151 }
2152
2153 PUTBACK;
2154 call_sv (cb, G_VOID | G_DISCARD);
760 } 2155 }
761
762 free_coro_mortal ();
763
764 UNLOCK;
765 }
766}
767
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781
782 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 2156 }
784 struct coro temp; 2157}
785 2158
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 2159static void
787 LOAD (coro); 2160coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
788 2161{
789 destroy_stacks (); 2162 AV *av;
790 2163
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2164 if (coro->status)
792
793 coro->mainstack = 0;
794 } 2165 {
2166 av = coro->status;
2167 av_clear (av);
2168 }
2169 else
2170 av = coro->status = newAV ();
795 2171
796 stack_free (coro->stack); 2172 /* items are actually not so common, so optimise for this case */
797 SvREFCNT_dec (coro->args); 2173 if (items)
798 Safefree (coro); 2174 {
2175 int i;
2176
2177 av_extend (av, items - 1);
2178
2179 for (i = 0; i < items; ++i)
2180 av_push (av, SvREFCNT_inc_NN (arg [i]));
2181 }
2182}
2183
2184static void
2185slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2186{
2187 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2188 api_ready (aTHX_ sv_manager);
2189
2190 frame->prepare = prepare_schedule;
2191 frame->check = slf_check_repeat;
2192
2193 /* as a minor optimisation, we could unwind all stacks here */
2194 /* but that puts extra pressure on pp_slf, and is not worth much */
2195 /*coro_unwind_stacks (aTHX);*/
2196}
2197
2198static void
2199slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2200{
2201 HV *coro_hv = (HV *)SvRV (coro_current);
2202
2203 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2204 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2205}
2206
2207static void
2208slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 HV *coro_hv;
2211 struct coro *coro;
2212
2213 if (items <= 0)
2214 croak ("Coro::cancel called without coro object,");
2215
2216 coro = SvSTATE (arg [0]);
2217 coro_hv = coro->hv;
2218
2219 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2220
2221 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2222 {
2223 /* coro currently busy cancelling something, so just notify it */
2224 coro->slf_frame.data = (void *)coro;
2225
2226 frame->prepare = prepare_nop;
2227 frame->check = slf_check_nop;
2228 }
2229 else if (coro_hv == (HV *)SvRV (coro_current))
2230 {
2231 /* cancelling the current coro is allowed, and equals terminate */
2232 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2233 }
2234 else
2235 {
2236 struct coro *self = SvSTATE_current;
2237
2238 /* otherwise we cancel directly, purely for speed reasons
2239 * unfortunately, this requires some magic trickery, as
2240 * somebody else could cancel us, so we have to fight the cancellation.
2241 * this is ugly, and hopefully fully worth the extra speed.
2242 * besides, I can't get the slow-but-safe version working...
2243 */
2244 slf_frame.data = 0;
2245 self->flags |= CF_NOCANCEL;
2246 coro_state_destroy (aTHX_ coro);
2247 self->flags &= ~CF_NOCANCEL;
2248
2249 if (slf_frame.data)
2250 {
2251 /* while we were busy we have been cancelled, so terminate */
2252 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2253 }
2254 else
2255 {
2256 frame->prepare = prepare_nop;
2257 frame->check = slf_check_nop;
2258 }
2259 }
799} 2260}
800 2261
801static int 2262static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 2263slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
803{ 2264{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 2265 frame->prepare = 0;
805 mg->mg_ptr = 0; 2266 coro_unwind_stacks (aTHX);
806 2267
807 coro_state_destroy (coro); 2268 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
808 2269
809 return 0; 2270 return 1;
810} 2271}
811 2272
812static int 2273static int
813coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 2274safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
814{ 2275{
815 struct coro *coro = (struct coro *)mg->mg_ptr; 2276 if (coro->cctx)
2277 croak ("coro inside C callback, unable to cancel at this time, caught");
816 2278
817 ++coro->refcnt; 2279 if (coro->flags & CF_NEW)
2280 {
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro_state_destroy (aTHX_ coro);
2283 }
2284 else
2285 {
2286 if (!coro->slf_frame.prepare)
2287 croak ("coro outside an SLF function, unable to cancel at this time, caught");
818 2288
2289 slf_destroy (aTHX_ coro);
2290
2291 coro_set_status (aTHX_ coro, arg, items);
2292 coro->slf_frame.prepare = prepare_nop;
2293 coro->slf_frame.check = slf_check_safe_cancel;
2294
2295 api_ready (aTHX_ (SV *)coro->hv);
2296 }
2297
819 return 0; 2298 return 1;
820} 2299}
821 2300
822static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0,
824 coro_state_clear,
825 0,
826#ifdef MGf_DUP
827 coro_state_dup,
828#endif
829};
830
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
855{
856 ta->prev = SvSTATE (prev);
857 ta->next = SvSTATE (next);
858 ta->flags = flags;
859}
860
861static void
862api_transfer (SV *prev, SV *next, int flags)
863{
864 dTHX;
865 struct transfer_args ta;
866
867 prepare_transfer (&ta, prev, next, flags);
868 TRANSFER (ta);
869}
870
871/** Coro ********************************************************************/ 2301/*****************************************************************************/
2302/* async pool handler */
872 2303
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 2304static int
886coro_enq (SV *sv) 2305slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
887{ 2306{
888 int prio; 2307 HV *hv = (HV *)SvRV (coro_current);
2308 struct coro *coro = (struct coro *)frame->data;
889 2309
890 if (SvTYPE (sv) != SVt_PVHV) 2310 if (!coro->invoke_cb)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2311 return 1; /* loop till we have invoke */
892 2312 else
893 prio = SvSTATE (sv)->prio;
894
895 av_push (coro_ready [prio - PRIO_MIN], sv);
896 coro_nready++;
897}
898
899static SV *
900coro_deq (int min_prio)
901{
902 int prio = PRIO_MAX - PRIO_MIN;
903
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909 if (AvFILLp (coro_ready [prio]) >= 0)
910 { 2313 {
911 coro_nready--; 2314 hv_store (hv, "desc", sizeof ("desc") - 1,
912 return av_shift (coro_ready [prio]); 2315 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
913 }
914 2316
915 return 0; 2317 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
916}
917
918static void
919api_ready (SV *coro)
920{
921 dTHX;
922
923 if (SvROK (coro))
924 coro = SvRV (coro);
925
926 LOCK;
927 coro_enq (SvREFCNT_inc (coro));
928 UNLOCK;
929}
930
931static void
932prepare_schedule (struct transfer_args *ta)
933{
934 SV *current, *prev, *next;
935
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946 2318
947 { 2319 {
948 dSP; 2320 dSP;
949 2321 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK; 2322 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 } 2323 }
2324
2325 SvREFCNT_dec (GvAV (PL_defgv));
2326 GvAV (PL_defgv) = coro->invoke_av;
2327 coro->invoke_av = 0;
2328
2329 return 0;
2330 }
2331}
2332
2333static void
2334slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2335{
2336 HV *hv = (HV *)SvRV (coro_current);
2337 struct coro *coro = SvSTATE_hv ((SV *)hv);
2338
2339 if (ecb_expect_true (coro->saved_deffh))
960 } 2340 {
2341 /* subsequent iteration */
2342 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2343 coro->saved_deffh = 0;
961 2344
962 prev = SvRV (current); 2345 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
963 SvRV (current) = next; 2346 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2347 {
2348 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2349 return;
2350 }
2351 else
2352 {
2353 av_clear (GvAV (PL_defgv));
2354 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
964 2355
965 /* free this only after the transfer */ 2356 coro->prio = 0;
966 LOCK;
967 free_coro_mortal ();
968 UNLOCK;
969 coro_mortal = prev;
970 2357
971 ta->prev = SvSTATE (prev); 2358 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
972 ta->next = SvSTATE (next); 2359 api_trace (aTHX_ coro_current, 0);
973 ta->flags = TRANSFER_SAVE_ALL;
974}
975 2360
2361 frame->prepare = prepare_schedule;
2362 av_push (av_async_pool, SvREFCNT_inc (hv));
2363 }
2364 }
2365 else
2366 {
2367 /* first iteration, simply fall through */
2368 frame->prepare = prepare_nop;
2369 }
2370
2371 frame->check = slf_check_pool_handler;
2372 frame->data = (void *)coro;
2373}
2374
2375/*****************************************************************************/
2376/* rouse callback */
2377
2378#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2379
2380static void
2381coro_rouse_callback (pTHX_ CV *cv)
2382{
2383 dXSARGS;
2384 SV *data = (SV *)S_GENSUB_ARG;
2385
2386 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2387 {
2388 /* first call, set args */
2389 SV *coro = SvRV (data);
2390 AV *av = newAV ();
2391
2392 SvRV_set (data, (SV *)av);
2393
2394 /* better take a full copy of the arguments */
2395 while (items--)
2396 av_store (av, items, newSVsv (ST (items)));
2397
2398 api_ready (aTHX_ coro);
2399 SvREFCNT_dec (coro);
2400 }
2401
2402 XSRETURN_EMPTY;
2403}
2404
976static void 2405static int
2406slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2407{
2408 SV *data = (SV *)frame->data;
2409
2410 if (CORO_THROW)
2411 return 0;
2412
2413 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2414 return 1;
2415
2416 /* now push all results on the stack */
2417 {
2418 dSP;
2419 AV *av = (AV *)SvRV (data);
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (av) + 1);
2423 for (i = 0; i <= AvFILLp (av); ++i)
2424 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2425
2426 /* we have stolen the elements, so set length to zero and free */
2427 AvFILLp (av) = -1;
2428 av_undef (av);
2429
2430 PUTBACK;
2431 }
2432
2433 return 0;
2434}
2435
2436static void
2437slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2438{
2439 SV *cb;
2440
2441 if (items)
2442 cb = arg [0];
2443 else
2444 {
2445 struct coro *coro = SvSTATE_current;
2446
2447 if (!coro->rouse_cb)
2448 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2449
2450 cb = sv_2mortal (coro->rouse_cb);
2451 coro->rouse_cb = 0;
2452 }
2453
2454 if (!SvROK (cb)
2455 || SvTYPE (SvRV (cb)) != SVt_PVCV
2456 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2457 croak ("Coro::rouse_wait called with illegal callback argument,");
2458
2459 {
2460 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2461 SV *data = (SV *)S_GENSUB_ARG;
2462
2463 frame->data = (void *)data;
2464 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2465 frame->check = slf_check_rouse_wait;
2466 }
2467}
2468
2469static SV *
2470coro_new_rouse_cb (pTHX)
2471{
2472 HV *hv = (HV *)SvRV (coro_current);
2473 struct coro *coro = SvSTATE_hv (hv);
2474 SV *data = newRV_inc ((SV *)hv);
2475 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2476
2477 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2478 SvREFCNT_dec (data); /* magicext increases the refcount */
2479
2480 SvREFCNT_dec (coro->rouse_cb);
2481 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2482
2483 return cb;
2484}
2485
2486/*****************************************************************************/
2487/* schedule-like-function opcode (SLF) */
2488
2489static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2490static const CV *slf_cv;
2491static SV **slf_argv;
2492static int slf_argc, slf_arga; /* count, allocated */
2493static I32 slf_ax; /* top of stack, for restore */
2494
2495/* this restores the stack in the case we patched the entersub, to */
2496/* recreate the stack frame as perl will on following calls */
2497/* since entersub cleared the stack */
2498static OP *
2499pp_restore (pTHX)
2500{
2501 int i;
2502 SV **SP = PL_stack_base + slf_ax;
2503
2504 PUSHMARK (SP);
2505
2506 EXTEND (SP, slf_argc + 1);
2507
2508 for (i = 0; i < slf_argc; ++i)
2509 PUSHs (sv_2mortal (slf_argv [i]));
2510
2511 PUSHs ((SV *)CvGV (slf_cv));
2512
2513 RETURNOP (slf_restore.op_first);
2514}
2515
2516static void
2517slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2518{
2519 SV **arg = (SV **)slf_frame.data;
2520
2521 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2522}
2523
2524static void
2525slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (items != 2)
2528 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2529
2530 frame->prepare = slf_prepare_transfer;
2531 frame->check = slf_check_nop;
2532 frame->data = (void *)arg; /* let's hope it will stay valid */
2533}
2534
2535static void
2536slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 frame->prepare = prepare_schedule;
2539 frame->check = slf_check_nop;
2540}
2541
2542static void
977prepare_cede (struct transfer_args *ta) 2543slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
978{ 2544{
979 LOCK; 2545 struct coro *next = (struct coro *)slf_frame.data;
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982 2546
2547 SvREFCNT_inc_NN (next->hv);
983 prepare_schedule (ta); 2548 prepare_schedule_to (aTHX_ ta, next);
984} 2549}
985 2550
986static void 2551static void
987api_schedule (void) 2552slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
988{ 2553{
989 dTHX; 2554 if (!items)
2555 croak ("Coro::schedule_to expects a coroutine argument, caught");
2556
2557 frame->data = (void *)SvSTATE (arg [0]);
2558 frame->prepare = slf_prepare_schedule_to;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2564{
2565 api_ready (aTHX_ SvRV (coro_current));
2566
2567 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2568}
2569
2570static void
2571slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 frame->prepare = prepare_cede;
2574 frame->check = slf_check_nop;
2575}
2576
2577static void
2578slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2579{
2580 frame->prepare = prepare_cede_notself;
2581 frame->check = slf_check_nop;
2582}
2583
2584/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2585static void
2586slf_destroy (pTHX_ struct coro *coro)
2587{
2588 /* this callback is reserved for slf functions needing to do cleanup */
2589 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2590 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2591
2592 /*
2593 * The on_destroy above most likely is from an SLF call.
2594 * Since by definition the SLF call will not finish when we destroy
2595 * the coro, we will have to force-finish it here, otherwise
2596 * cleanup functions cannot call SLF functions.
2597 */
2598 coro->slf_frame.prepare = 0;
2599}
2600
2601/*
2602 * these not obviously related functions are all rolled into one
2603 * function to increase chances that they all will call transfer with the same
2604 * stack offset
2605 * SLF stands for "schedule-like-function".
2606 */
2607static OP *
2608pp_slf (pTHX)
2609{
2610 I32 checkmark; /* mark SP to see how many elements check has pushed */
2611
2612 /* set up the slf frame, unless it has already been set-up */
2613 /* the latter happens when a new coro has been started */
2614 /* or when a new cctx was attached to an existing coroutine */
2615 if (ecb_expect_true (!slf_frame.prepare))
2616 {
2617 /* first iteration */
2618 dSP;
2619 SV **arg = PL_stack_base + TOPMARK + 1;
2620 int items = SP - arg; /* args without function object */
2621 SV *gv = *sp;
2622
2623 /* do a quick consistency check on the "function" object, and if it isn't */
2624 /* for us, divert to the real entersub */
2625 if (SvTYPE (gv) != SVt_PVGV
2626 || !GvCV (gv)
2627 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2628 return PL_ppaddr[OP_ENTERSUB](aTHX);
2629
2630 if (!(PL_op->op_flags & OPf_STACKED))
2631 {
2632 /* ampersand-form of call, use @_ instead of stack */
2633 AV *av = GvAV (PL_defgv);
2634 arg = AvARRAY (av);
2635 items = AvFILLp (av) + 1;
2636 }
2637
2638 /* now call the init function, which needs to set up slf_frame */
2639 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2640 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2641
2642 /* pop args */
2643 SP = PL_stack_base + POPMARK;
2644
2645 PUTBACK;
2646 }
2647
2648 /* now that we have a slf_frame, interpret it! */
2649 /* we use a callback system not to make the code needlessly */
2650 /* complicated, but so we can run multiple perl coros from one cctx */
2651
2652 do
2653 {
990 struct transfer_args ta; 2654 struct coro_transfer_args ta;
991 2655
992 prepare_schedule (&ta); 2656 slf_frame.prepare (aTHX_ &ta);
993 TRANSFER (ta); 2657 TRANSFER (ta, 0);
994}
995 2658
2659 checkmark = PL_stack_sp - PL_stack_base;
2660 }
2661 while (slf_frame.check (aTHX_ &slf_frame));
2662
2663 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2664
2665 /* exception handling */
2666 if (ecb_expect_false (CORO_THROW))
2667 {
2668 SV *exception = sv_2mortal (CORO_THROW);
2669
2670 CORO_THROW = 0;
2671 sv_setsv (ERRSV, exception);
2672 croak (0);
2673 }
2674
2675 /* return value handling - mostly like entersub */
2676 /* make sure we put something on the stack in scalar context */
2677 if (GIMME_V == G_SCALAR
2678 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2679 {
2680 dSP;
2681 SV **bot = PL_stack_base + checkmark;
2682
2683 if (sp == bot) /* too few, push undef */
2684 bot [1] = &PL_sv_undef;
2685 else /* too many, take last one */
2686 bot [1] = *sp;
2687
2688 SP = bot + 1;
2689
2690 PUTBACK;
2691 }
2692
2693 return NORMAL;
2694}
2695
2696static void
2697api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2698{
2699 int i;
2700 SV **arg = PL_stack_base + ax;
2701 int items = PL_stack_sp - arg + 1;
2702
2703 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2704
2705 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2706 && PL_op->op_ppaddr != pp_slf)
2707 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2708
2709 CvFLAGS (cv) |= CVf_SLF;
2710 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2711 slf_cv = cv;
2712
2713 /* we patch the op, and then re-run the whole call */
2714 /* we have to put the same argument on the stack for this to work */
2715 /* and this will be done by pp_restore */
2716 slf_restore.op_next = (OP *)&slf_restore;
2717 slf_restore.op_type = OP_CUSTOM;
2718 slf_restore.op_ppaddr = pp_restore;
2719 slf_restore.op_first = PL_op;
2720
2721 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2722
2723 if (PL_op->op_flags & OPf_STACKED)
2724 {
2725 if (items > slf_arga)
2726 {
2727 slf_arga = items;
2728 Safefree (slf_argv);
2729 New (0, slf_argv, slf_arga, SV *);
2730 }
2731
2732 slf_argc = items;
2733
2734 for (i = 0; i < items; ++i)
2735 slf_argv [i] = SvREFCNT_inc (arg [i]);
2736 }
2737 else
2738 slf_argc = 0;
2739
2740 PL_op->op_ppaddr = pp_slf;
2741 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2742
2743 PL_op = (OP *)&slf_restore;
2744}
2745
2746/*****************************************************************************/
2747/* dynamic wind */
2748
2749static void
2750on_enterleave_call (pTHX_ SV *cb)
2751{
2752 dSP;
2753
2754 PUSHSTACK;
2755
2756 PUSHMARK (SP);
2757 PUTBACK;
2758 call_sv (cb, G_VOID | G_DISCARD);
2759 SPAGAIN;
2760
2761 POPSTACK;
2762}
2763
2764static SV *
2765coro_avp_pop_and_free (pTHX_ AV **avp)
2766{
2767 AV *av = *avp;
2768 SV *res = av_pop (av);
2769
2770 if (AvFILLp (av) < 0)
2771 {
2772 *avp = 0;
2773 SvREFCNT_dec (av);
2774 }
2775
2776 return res;
2777}
2778
2779static void
2780coro_pop_on_enter (pTHX_ void *coro)
2781{
2782 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2783 SvREFCNT_dec (cb);
2784}
2785
2786static void
2787coro_pop_on_leave (pTHX_ void *coro)
2788{
2789 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2790 on_enterleave_call (aTHX_ sv_2mortal (cb));
2791}
2792
2793/*****************************************************************************/
2794/* PerlIO::cede */
2795
2796typedef struct
2797{
2798 PerlIOBuf base;
2799 NV next, every;
2800} PerlIOCede;
2801
2802static IV ecb_cold
2803PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2804{
2805 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2806
2807 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2808 self->next = nvtime () + self->every;
2809
2810 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2811}
2812
2813static SV * ecb_cold
2814PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2815{
2816 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2817
2818 return newSVnv (self->every);
2819}
2820
2821static IV
2822PerlIOCede_flush (pTHX_ PerlIO *f)
2823{
2824 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2825 double now = nvtime ();
2826
2827 if (now >= self->next)
2828 {
2829 api_cede (aTHX);
2830 self->next = now + self->every;
2831 }
2832
2833 return PerlIOBuf_flush (aTHX_ f);
2834}
2835
2836static PerlIO_funcs PerlIO_cede =
2837{
2838 sizeof(PerlIO_funcs),
2839 "cede",
2840 sizeof(PerlIOCede),
2841 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2842 PerlIOCede_pushed,
2843 PerlIOBuf_popped,
2844 PerlIOBuf_open,
2845 PerlIOBase_binmode,
2846 PerlIOCede_getarg,
2847 PerlIOBase_fileno,
2848 PerlIOBuf_dup,
2849 PerlIOBuf_read,
2850 PerlIOBuf_unread,
2851 PerlIOBuf_write,
2852 PerlIOBuf_seek,
2853 PerlIOBuf_tell,
2854 PerlIOBuf_close,
2855 PerlIOCede_flush,
2856 PerlIOBuf_fill,
2857 PerlIOBase_eof,
2858 PerlIOBase_error,
2859 PerlIOBase_clearerr,
2860 PerlIOBase_setlinebuf,
2861 PerlIOBuf_get_base,
2862 PerlIOBuf_bufsiz,
2863 PerlIOBuf_get_ptr,
2864 PerlIOBuf_get_cnt,
2865 PerlIOBuf_set_ptrcnt,
2866};
2867
2868/*****************************************************************************/
2869/* Coro::Semaphore & Coro::Signal */
2870
2871static SV *
2872coro_waitarray_new (pTHX_ int count)
2873{
2874 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2875 AV *av = newAV ();
2876 SV **ary;
2877
2878 /* unfortunately, building manually saves memory */
2879 Newx (ary, 2, SV *);
2880 AvALLOC (av) = ary;
2881#if PERL_VERSION_ATLEAST (5,10,0)
2882 AvARRAY (av) = ary;
2883#else
2884 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2885 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2886 SvPVX ((SV *)av) = (char *)ary;
2887#endif
2888 AvMAX (av) = 1;
2889 AvFILLp (av) = 0;
2890 ary [0] = newSViv (count);
2891
2892 return newRV_noinc ((SV *)av);
2893}
2894
2895/* semaphore */
2896
2897static void
2898coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2899{
2900 SV *count_sv = AvARRAY (av)[0];
2901 IV count = SvIVX (count_sv);
2902
2903 count += adjust;
2904 SvIVX (count_sv) = count;
2905
2906 /* now wake up as many waiters as are expected to lock */
2907 while (count > 0 && AvFILLp (av) > 0)
2908 {
2909 SV *cb;
2910
2911 /* swap first two elements so we can shift a waiter */
2912 AvARRAY (av)[0] = AvARRAY (av)[1];
2913 AvARRAY (av)[1] = count_sv;
2914 cb = av_shift (av);
2915
2916 if (SvOBJECT (cb))
2917 {
2918 api_ready (aTHX_ cb);
2919 --count;
2920 }
2921 else if (SvTYPE (cb) == SVt_PVCV)
2922 {
2923 dSP;
2924 PUSHMARK (SP);
2925 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2926 PUTBACK;
2927 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2928 }
2929
2930 SvREFCNT_dec (cb);
2931 }
2932}
2933
2934static void
2935coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2936{
2937 /* call $sem->adjust (0) to possibly wake up some other waiters */
2938 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2939}
2940
996static void 2941static int
997api_cede (void) 2942slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
998{ 2943{
999 dTHX; 2944 AV *av = (AV *)frame->data;
1000 struct transfer_args ta; 2945 SV *count_sv = AvARRAY (av)[0];
2946 SV *coro_hv = SvRV (coro_current);
1001 2947
1002 prepare_cede (&ta); 2948 /* if we are about to throw, don't actually acquire the lock, just throw */
1003 TRANSFER (ta); 2949 if (CORO_THROW)
1004} 2950 return 0;
2951 else if (SvIVX (count_sv) > 0)
2952 {
2953 frame->destroy = 0;
1005 2954
2955 if (acquire)
2956 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2957 else
2958 coro_semaphore_adjust (aTHX_ av, 0);
2959
2960 return 0;
2961 }
2962 else
2963 {
2964 int i;
2965 /* if we were woken up but can't down, we look through the whole */
2966 /* waiters list and only add us if we aren't in there already */
2967 /* this avoids some degenerate memory usage cases */
2968 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2969 if (AvARRAY (av)[i] == coro_hv)
2970 return 1;
2971
2972 av_push (av, SvREFCNT_inc (coro_hv));
2973 return 1;
2974 }
2975}
2976
2977static int
2978slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2979{
2980 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2981}
2982
2983static int
2984slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2985{
2986 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2987}
2988
2989static void
2990slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2991{
2992 AV *av = (AV *)SvRV (arg [0]);
2993
2994 if (SvIVX (AvARRAY (av)[0]) > 0)
2995 {
2996 frame->data = (void *)av;
2997 frame->prepare = prepare_nop;
2998 }
2999 else
3000 {
3001 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3002
3003 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3004 frame->prepare = prepare_schedule;
3005 /* to avoid race conditions when a woken-up coro gets terminated */
3006 /* we arrange for a temporary on_destroy that calls adjust (0) */
3007 frame->destroy = coro_semaphore_destroy;
3008 }
3009}
3010
3011static void
3012slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3013{
3014 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3015 frame->check = slf_check_semaphore_down;
3016}
3017
3018static void
3019slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3020{
3021 if (items >= 2)
3022 {
3023 /* callback form */
3024 AV *av = (AV *)SvRV (arg [0]);
3025 SV *cb_cv = s_get_cv_croak (arg [1]);
3026
3027 av_push (av, SvREFCNT_inc_NN (cb_cv));
3028
3029 if (SvIVX (AvARRAY (av)[0]) > 0)
3030 coro_semaphore_adjust (aTHX_ av, 0);
3031
3032 frame->prepare = prepare_nop;
3033 frame->check = slf_check_nop;
3034 }
3035 else
3036 {
3037 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3038 frame->check = slf_check_semaphore_wait;
3039 }
3040}
3041
3042/* signal */
3043
3044static void
3045coro_signal_wake (pTHX_ AV *av, int count)
3046{
3047 SvIVX (AvARRAY (av)[0]) = 0;
3048
3049 /* now signal count waiters */
3050 while (count > 0 && AvFILLp (av) > 0)
3051 {
3052 SV *cb;
3053
3054 /* swap first two elements so we can shift a waiter */
3055 cb = AvARRAY (av)[0];
3056 AvARRAY (av)[0] = AvARRAY (av)[1];
3057 AvARRAY (av)[1] = cb;
3058
3059 cb = av_shift (av);
3060
3061 if (SvTYPE (cb) == SVt_PVCV)
3062 {
3063 dSP;
3064 PUSHMARK (SP);
3065 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3066 PUTBACK;
3067 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3068 }
3069 else
3070 {
3071 api_ready (aTHX_ cb);
3072 sv_setiv (cb, 0); /* signal waiter */
3073 }
3074
3075 SvREFCNT_dec (cb);
3076
3077 --count;
3078 }
3079}
3080
3081static int
3082slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3083{
3084 /* if we are about to throw, also stop waiting */
3085 return SvROK ((SV *)frame->data) && !CORO_THROW;
3086}
3087
3088static void
3089slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3090{
3091 AV *av = (AV *)SvRV (arg [0]);
3092
3093 if (items >= 2)
3094 {
3095 SV *cb_cv = s_get_cv_croak (arg [1]);
3096 av_push (av, SvREFCNT_inc_NN (cb_cv));
3097
3098 if (SvIVX (AvARRAY (av)[0]))
3099 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3100
3101 frame->prepare = prepare_nop;
3102 frame->check = slf_check_nop;
3103 }
3104 else if (SvIVX (AvARRAY (av)[0]))
3105 {
3106 SvIVX (AvARRAY (av)[0]) = 0;
3107 frame->prepare = prepare_nop;
3108 frame->check = slf_check_nop;
3109 }
3110 else
3111 {
3112 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3113
3114 av_push (av, waiter);
3115
3116 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3117 frame->prepare = prepare_schedule;
3118 frame->check = slf_check_signal_wait;
3119 }
3120}
3121
3122/*****************************************************************************/
3123/* Coro::AIO */
3124
3125#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3126
3127/* helper storage struct */
3128struct io_state
3129{
3130 int errorno;
3131 I32 laststype; /* U16 in 5.10.0 */
3132 int laststatval;
3133 Stat_t statcache;
3134};
3135
3136static void
3137coro_aio_callback (pTHX_ CV *cv)
3138{
3139 dXSARGS;
3140 AV *state = (AV *)S_GENSUB_ARG;
3141 SV *coro = av_pop (state);
3142 SV *data_sv = newSV (sizeof (struct io_state));
3143
3144 av_extend (state, items - 1);
3145
3146 sv_upgrade (data_sv, SVt_PV);
3147 SvCUR_set (data_sv, sizeof (struct io_state));
3148 SvPOK_only (data_sv);
3149
3150 {
3151 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3152
3153 data->errorno = errno;
3154 data->laststype = PL_laststype;
3155 data->laststatval = PL_laststatval;
3156 data->statcache = PL_statcache;
3157 }
3158
3159 /* now build the result vector out of all the parameters and the data_sv */
3160 {
3161 int i;
3162
3163 for (i = 0; i < items; ++i)
3164 av_push (state, SvREFCNT_inc_NN (ST (i)));
3165 }
3166
3167 av_push (state, data_sv);
3168
3169 api_ready (aTHX_ coro);
3170 SvREFCNT_dec (coro);
3171 SvREFCNT_dec ((AV *)state);
3172}
3173
3174static int
3175slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3176{
3177 AV *state = (AV *)frame->data;
3178
3179 /* if we are about to throw, return early */
3180 /* this does not cancel the aio request, but at least */
3181 /* it quickly returns */
3182 if (CORO_THROW)
3183 return 0;
3184
3185 /* one element that is an RV? repeat! */
3186 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3187 return 1;
3188
3189 /* restore status */
3190 {
3191 SV *data_sv = av_pop (state);
3192 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3193
3194 errno = data->errorno;
3195 PL_laststype = data->laststype;
3196 PL_laststatval = data->laststatval;
3197 PL_statcache = data->statcache;
3198
3199 SvREFCNT_dec (data_sv);
3200 }
3201
3202 /* push result values */
3203 {
3204 dSP;
3205 int i;
3206
3207 EXTEND (SP, AvFILLp (state) + 1);
3208 for (i = 0; i <= AvFILLp (state); ++i)
3209 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3210
3211 PUTBACK;
3212 }
3213
3214 return 0;
3215}
3216
3217static void
3218slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3219{
3220 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3221 SV *coro_hv = SvRV (coro_current);
3222 struct coro *coro = SvSTATE_hv (coro_hv);
3223
3224 /* put our coroutine id on the state arg */
3225 av_push (state, SvREFCNT_inc_NN (coro_hv));
3226
3227 /* first see whether we have a non-zero priority and set it as AIO prio */
3228 if (coro->prio)
3229 {
3230 dSP;
3231
3232 static SV *prio_cv;
3233 static SV *prio_sv;
3234
3235 if (ecb_expect_false (!prio_cv))
3236 {
3237 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3238 prio_sv = newSViv (0);
3239 }
3240
3241 PUSHMARK (SP);
3242 sv_setiv (prio_sv, coro->prio);
3243 XPUSHs (prio_sv);
3244
3245 PUTBACK;
3246 call_sv (prio_cv, G_VOID | G_DISCARD);
3247 }
3248
3249 /* now call the original request */
3250 {
3251 dSP;
3252 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3253 int i;
3254
3255 PUSHMARK (SP);
3256
3257 /* first push all args to the stack */
3258 EXTEND (SP, items + 1);
3259
3260 for (i = 0; i < items; ++i)
3261 PUSHs (arg [i]);
3262
3263 /* now push the callback closure */
3264 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3265
3266 /* now call the AIO function - we assume our request is uncancelable */
3267 PUTBACK;
3268 call_sv ((SV *)req, G_VOID | G_DISCARD);
3269 }
3270
3271 /* now that the request is going, we loop till we have a result */
3272 frame->data = (void *)state;
3273 frame->prepare = prepare_schedule;
3274 frame->check = slf_check_aio_req;
3275}
3276
3277static void
3278coro_aio_req_xs (pTHX_ CV *cv)
3279{
3280 dXSARGS;
3281
3282 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3283
3284 XSRETURN_EMPTY;
3285}
3286
3287/*****************************************************************************/
3288
3289#if CORO_CLONE
3290# include "clone.c"
3291#endif
3292
3293/*****************************************************************************/
3294
3295static SV *
3296coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3297{
3298 SV *coro_sv;
3299 struct coro *coro;
3300 MAGIC *mg;
3301 HV *hv;
3302 SV *cb;
3303 int i;
3304
3305 if (argc > 0)
3306 {
3307 cb = s_get_cv_croak (argv [0]);
3308
3309 if (!is_coro)
3310 {
3311 if (CvISXSUB (cb))
3312 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3313
3314 if (!CvROOT (cb))
3315 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3316 }
3317 }
3318
3319 Newz (0, coro, 1, struct coro);
3320 coro->args = newAV ();
3321 coro->flags = CF_NEW;
3322
3323 if (coro_first) coro_first->prev = coro;
3324 coro->next = coro_first;
3325 coro_first = coro;
3326
3327 coro->hv = hv = newHV ();
3328 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3329 mg->mg_flags |= MGf_DUP;
3330 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3331
3332 if (argc > 0)
3333 {
3334 av_extend (coro->args, argc + is_coro - 1);
3335
3336 if (is_coro)
3337 {
3338 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3339 cb = (SV *)cv_coro_run;
3340 }
3341
3342 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3343
3344 for (i = 1; i < argc; i++)
3345 av_push (coro->args, newSVsv (argv [i]));
3346 }
3347
3348 return coro_sv;
3349}
3350
3351#ifndef __cplusplus
3352ecb_cold XS(boot_Coro__State);
3353#endif
3354
3355#if CORO_JIT
3356
3357static void ecb_noinline ecb_cold
3358pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3359{
3360 dSP;
3361 AV *av = newAV ();
3362
3363 av_store (av, 3, newSVuv (d));
3364 av_store (av, 2, newSVuv (c));
3365 av_store (av, 1, newSVuv (b));
3366 av_store (av, 0, newSVuv (a));
3367
3368 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3369
3370 PUTBACK;
3371}
3372
3373static void ecb_noinline ecb_cold
3374jit_init (pTHX)
3375{
3376 dSP;
3377 SV *load, *save;
3378 char *map_base;
3379 char *load_ptr, *save_ptr;
3380 STRLEN load_len, save_len, map_len;
3381 int count;
3382
3383 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3384
3385 PUSHMARK (SP);
3386#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3387# include "state.h"
3388#undef VARx
3389 count = call_pv ("Coro::State::_jit", G_ARRAY);
3390 SPAGAIN;
3391
3392 save = POPs; save_ptr = SvPVbyte (save, save_len);
3393 load = POPs; load_ptr = SvPVbyte (load, load_len);
3394
3395 map_len = load_len + save_len + 16;
3396
3397 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3398
3399 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3400
3401 load_perl_slots = (load_save_perl_slots_type)map_base;
3402 memcpy (map_base, load_ptr, load_len);
3403
3404 map_base += (load_len + 15) & ~15;
3405
3406 save_perl_slots = (load_save_perl_slots_type)map_base;
3407 memcpy (map_base, save_ptr, save_len);
3408
3409 /* we are good citizens and try to make the page read-only, so the evil evil */
3410 /* hackers might have it a bit more difficult */
3411 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3412
3413 PUTBACK;
3414 eval_pv ("undef &Coro::State::_jit", 1);
3415}
3416
3417#endif
3418
1006MODULE = Coro::State PACKAGE = Coro::State 3419MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 3420
1008PROTOTYPES: DISABLE 3421PROTOTYPES: DISABLE
1009 3422
1010BOOT: 3423BOOT:
1011{ 3424{
1012#ifdef USE_ITHREADS 3425#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 3426# if CORO_PTHREAD
3427 coro_thx = PERL_GET_CONTEXT;
3428# endif
1014#endif 3429#endif
1015 BOOT_PAGESIZE; 3430 BOOT_PAGESIZE;
1016 3431
3432 /* perl defines these to check for existance first, but why it doesn't */
3433 /* just create them one at init time is not clear to me, except for */
3434 /* programs trying to delete them, but... */
3435 /* anyway, we declare this as invalid and make sure they are initialised here */
3436 DEFSV;
3437 ERRSV;
3438
3439 cctx_current = cctx_new_empty ();
3440
3441 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3442 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3443
3444 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3445 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3446 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3447
3448 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3449 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3450 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3451
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3452 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 3453
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3454 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3455 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3456 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3457 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 3458
1023 main_mainstack = PL_mainstack; 3459 main_mainstack = PL_mainstack;
3460 main_top_env = PL_top_env;
1024 3461
3462 while (main_top_env->je_prev)
3463 main_top_env = main_top_env->je_prev;
3464
3465 {
3466 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3467
3468 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3469 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3470
3471 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3472 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3473 }
3474
1025 coroapi.ver = CORO_API_VERSION; 3475 coroapi.ver = CORO_API_VERSION;
3476 coroapi.rev = CORO_API_REVISION;
3477
1026 coroapi.transfer = api_transfer; 3478 coroapi.transfer = api_transfer;
1027 3479
3480 coroapi.sv_state = SvSTATE_;
3481 coroapi.execute_slf = api_execute_slf;
3482 coroapi.prepare_nop = prepare_nop;
3483 coroapi.prepare_schedule = prepare_schedule;
3484 coroapi.prepare_cede = prepare_cede;
3485 coroapi.prepare_cede_notself = prepare_cede_notself;
3486
3487 time_init (aTHX);
3488
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3489 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3490#if CORO_JIT
3491 PUTBACK;
3492 jit_init (aTHX);
3493 SPAGAIN;
3494#endif
1029} 3495}
1030 3496
1031SV * 3497SV *
1032new (char *klass, ...) 3498new (SV *klass, ...)
3499 ALIAS:
3500 Coro::new = 1
1033 CODE: 3501 CODE:
1034{ 3502 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1035 struct coro *coro; 3503 OUTPUT:
1036 HV *hv;
1037 int i;
1038
1039 Newz (0, coro, 1, struct coro);
1040 coro->args = newAV ();
1041
1042 hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045
1046 for (i = 1; i < items; i++)
1047 av_push (coro->args, newSVsv (ST (i)));
1048
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1050 /*coro->stack = 0;*/
1051}
1052 OUTPUT:
1053 RETVAL 3504 RETVAL
1054 3505
1055void 3506void
1056_set_stacklevel (...) 3507transfer (...)
1057 ALIAS: 3508 PROTOTYPE: $$
1058 Coro::State::transfer = 1 3509 CODE:
1059 Coro::schedule = 2 3510 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1060 Coro::cede = 3
1061 Coro::Cont::yield = 4
1062 CODE:
1063{
1064 struct transfer_args ta;
1065
1066 switch (ix)
1067 {
1068 case 0:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1070 ta.next = 0;
1071 ta.flags = TRANSFER_SET_STACKLEVEL;
1072 break;
1073
1074 case 1:
1075 if (items != 3)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1077
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1079 break;
1080
1081 case 2:
1082 prepare_schedule (&ta);
1083 break;
1084
1085 case 3:
1086 prepare_cede (&ta);
1087 break;
1088
1089 case 4:
1090 {
1091 SV *yieldstack;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break;
1114
1115 }
1116
1117 TRANSFER (ta);
1118}
1119 3511
1120void 3512void
1121_clone_state_from (SV *dst, SV *src)
1122 CODE:
1123{
1124 struct coro *coro_src = SvSTATE (src);
1125
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128 ++coro_src->refcnt;
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130}
1131
1132void
1133_exit (code) 3513_exit (int code)
1134 int code
1135 PROTOTYPE: $ 3514 PROTOTYPE: $
1136 CODE: 3515 CODE:
1137 _exit (code); 3516 _exit (code);
1138 3517
3518SV *
3519clone (Coro::State coro)
3520 CODE:
3521{
3522#if CORO_CLONE
3523 struct coro *ncoro = coro_clone (aTHX_ coro);
3524 MAGIC *mg;
3525 /* TODO: too much duplication */
3526 ncoro->hv = newHV ();
3527 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3528 mg->mg_flags |= MGf_DUP;
3529 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3530#else
3531 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3532#endif
3533}
3534 OUTPUT:
3535 RETVAL
3536
3537int
3538cctx_stacksize (int new_stacksize = 0)
3539 PROTOTYPE: ;$
3540 CODE:
3541 RETVAL = cctx_stacksize;
3542 if (new_stacksize)
3543 {
3544 cctx_stacksize = new_stacksize;
3545 ++cctx_gen;
3546 }
3547 OUTPUT:
3548 RETVAL
3549
3550int
3551cctx_max_idle (int max_idle = 0)
3552 PROTOTYPE: ;$
3553 CODE:
3554 RETVAL = cctx_max_idle;
3555 if (max_idle > 1)
3556 cctx_max_idle = max_idle;
3557 OUTPUT:
3558 RETVAL
3559
3560int
3561cctx_count ()
3562 PROTOTYPE:
3563 CODE:
3564 RETVAL = cctx_count;
3565 OUTPUT:
3566 RETVAL
3567
3568int
3569cctx_idle ()
3570 PROTOTYPE:
3571 CODE:
3572 RETVAL = cctx_idle;
3573 OUTPUT:
3574 RETVAL
3575
3576void
3577list ()
3578 PROTOTYPE:
3579 PPCODE:
3580{
3581 struct coro *coro;
3582 for (coro = coro_first; coro; coro = coro->next)
3583 if (coro->hv)
3584 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3585}
3586
3587void
3588call (Coro::State coro, SV *coderef)
3589 ALIAS:
3590 eval = 1
3591 CODE:
3592{
3593 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3594 {
3595 struct coro *current = SvSTATE_current;
3596 struct CoroSLF slf_save;
3597
3598 if (current != coro)
3599 {
3600 PUTBACK;
3601 save_perl (aTHX_ current);
3602 load_perl (aTHX_ coro);
3603 /* the coro is most likely in an active SLF call.
3604 * while not strictly required (the code we execute is
3605 * not allowed to call any SLF functions), it's cleaner
3606 * to reinitialise the slf_frame and restore it later.
3607 * This might one day allow us to actually do SLF calls
3608 * from code executed here.
3609 */
3610 slf_save = slf_frame;
3611 slf_frame.prepare = 0;
3612 SPAGAIN;
3613 }
3614
3615 PUSHSTACK;
3616
3617 PUSHMARK (SP);
3618 PUTBACK;
3619
3620 if (ix)
3621 eval_sv (coderef, 0);
3622 else
3623 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3624
3625 POPSTACK;
3626 SPAGAIN;
3627
3628 if (current != coro)
3629 {
3630 PUTBACK;
3631 slf_frame = slf_save;
3632 save_perl (aTHX_ coro);
3633 load_perl (aTHX_ current);
3634 SPAGAIN;
3635 }
3636 }
3637}
3638
3639SV *
3640is_ready (Coro::State coro)
3641 PROTOTYPE: $
3642 ALIAS:
3643 is_ready = CF_READY
3644 is_running = CF_RUNNING
3645 is_new = CF_NEW
3646 is_destroyed = CF_ZOMBIE
3647 is_zombie = CF_ZOMBIE
3648 is_suspended = CF_SUSPENDED
3649 CODE:
3650 RETVAL = boolSV (coro->flags & ix);
3651 OUTPUT:
3652 RETVAL
3653
3654void
3655throw (Coro::State self, SV *exception = &PL_sv_undef)
3656 PROTOTYPE: $;$
3657 CODE:
3658{
3659 struct coro *current = SvSTATE_current;
3660 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3661 SvREFCNT_dec (*exceptionp);
3662 SvGETMAGIC (exception);
3663 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3664}
3665
3666void
3667api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3668 PROTOTYPE: $;$
3669 C_ARGS: aTHX_ coro, flags
3670
3671SV *
3672has_cctx (Coro::State coro)
3673 PROTOTYPE: $
3674 CODE:
3675 /* maybe manage the running flag differently */
3676 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3677 OUTPUT:
3678 RETVAL
3679
3680int
3681is_traced (Coro::State coro)
3682 PROTOTYPE: $
3683 CODE:
3684 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3685 OUTPUT:
3686 RETVAL
3687
3688UV
3689rss (Coro::State coro)
3690 PROTOTYPE: $
3691 ALIAS:
3692 usecount = 1
3693 CODE:
3694 switch (ix)
3695 {
3696 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3697 case 1: RETVAL = coro->usecount; break;
3698 }
3699 OUTPUT:
3700 RETVAL
3701
3702void
3703force_cctx ()
3704 PROTOTYPE:
3705 CODE:
3706 cctx_current->idle_sp = 0;
3707
3708void
3709swap_defsv (Coro::State self)
3710 PROTOTYPE: $
3711 ALIAS:
3712 swap_defav = 1
3713 CODE:
3714 if (!self->slot)
3715 croak ("cannot swap state with coroutine that has no saved state,");
3716 else
3717 {
3718 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3719 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3720
3721 SV *tmp = *src; *src = *dst; *dst = tmp;
3722 }
3723
3724void
3725cancel (Coro::State self)
3726 CODE:
3727 coro_state_destroy (aTHX_ self);
3728
3729SV *
3730enable_times (int enabled = enable_times)
3731 CODE:
3732{
3733 RETVAL = boolSV (enable_times);
3734
3735 if (enabled != enable_times)
3736 {
3737 enable_times = enabled;
3738
3739 coro_times_update ();
3740 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3741 }
3742}
3743 OUTPUT:
3744 RETVAL
3745
3746void
3747times (Coro::State self)
3748 PPCODE:
3749{
3750 struct coro *current = SvSTATE (coro_current);
3751
3752 if (ecb_expect_false (current == self))
3753 {
3754 coro_times_update ();
3755 coro_times_add (SvSTATE (coro_current));
3756 }
3757
3758 EXTEND (SP, 2);
3759 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3760 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3761
3762 if (ecb_expect_false (current == self))
3763 coro_times_sub (SvSTATE (coro_current));
3764}
3765
3766void
3767swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3768 CODE:
3769{
3770 struct coro *current = SvSTATE_current;
3771
3772 if (current == coro)
3773 SWAP_SVS (current);
3774
3775 if (!coro->swap_sv)
3776 coro->swap_sv = newAV ();
3777
3778 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3779 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3780
3781 if (current == coro)
3782 SWAP_SVS (current);
3783}
3784
3785
1139MODULE = Coro::State PACKAGE = Coro 3786MODULE = Coro::State PACKAGE = Coro
1140 3787
1141BOOT: 3788BOOT:
1142{ 3789{
1143 int i; 3790 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3791 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3792 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3793 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3794 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3795 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3796 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3797 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1144 3798
3799 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3800 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3801 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3802 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3803
1145 coro_stash = gv_stashpv ("Coro", TRUE); 3804 coro_stash = gv_stashpv ("Coro", TRUE);
1146 3805
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3806 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3807 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3808 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3809 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3810 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3811 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1153
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV ();
1159 3812
1160 { 3813 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 3814 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1162 3815
1163 coroapi.schedule = api_schedule; 3816 coroapi.schedule = api_schedule;
3817 coroapi.schedule_to = api_schedule_to;
1164 coroapi.cede = api_cede; 3818 coroapi.cede = api_cede;
3819 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 3820 coroapi.ready = api_ready;
3821 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 3822 coroapi.nready = coro_nready;
1167 coroapi.current = coro_current; 3823 coroapi.current = coro_current;
1168 3824
1169 GCoroAPI = &coroapi; 3825 /*GCoroAPI = &coroapi;*/
1170 sv_setiv (sv, (IV)&coroapi); 3826 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 3827 SvREADONLY_on (sv);
1172 } 3828 }
1173} 3829}
1174 3830
3831SV *
3832async (...)
3833 PROTOTYPE: &@
3834 CODE:
3835 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3836 api_ready (aTHX_ RETVAL);
3837 OUTPUT:
3838 RETVAL
3839
3840void
3841_destroy (Coro::State coro)
3842 CODE:
3843 /* used by the manager thread */
3844 coro_state_destroy (aTHX_ coro);
3845
3846void
3847on_destroy (Coro::State coro, SV *cb)
3848 CODE:
3849 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3850
3851void
3852join (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_join);
3855
3856void
3857terminate (...)
3858 CODE:
3859 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3860
3861void
3862cancel (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3865
3866int
3867safe_cancel (Coro::State self, ...)
3868 C_ARGS: aTHX_ self, &ST (1), items - 1
3869
3870void
3871schedule (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3874
3875void
3876schedule_to (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3879
3880void
3881cede_to (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3884
3885void
3886cede (...)
3887 CODE:
3888 CORO_EXECUTE_SLF_XS (slf_init_cede);
3889
3890void
3891cede_notself (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3894
3895void
3896_set_current (SV *current)
3897 PROTOTYPE: $
3898 CODE:
3899 SvREFCNT_dec (SvRV (coro_current));
3900 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3901
3902void
3903_set_readyhook (SV *hook)
3904 PROTOTYPE: $
3905 CODE:
3906 SvREFCNT_dec (coro_readyhook);
3907 SvGETMAGIC (hook);
3908 if (SvOK (hook))
3909 {
3910 coro_readyhook = newSVsv (hook);
3911 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3912 }
3913 else
3914 {
3915 coro_readyhook = 0;
3916 CORO_READYHOOK = 0;
3917 }
3918
1175int 3919int
1176prio (Coro::State coro, int newprio = 0) 3920prio (Coro::State coro, int newprio = 0)
3921 PROTOTYPE: $;$
1177 ALIAS: 3922 ALIAS:
1178 nice = 1 3923 nice = 1
1179 CODE: 3924 CODE:
1180{ 3925{
1181 RETVAL = coro->prio; 3926 RETVAL = coro->prio;
1182 3927
1183 if (items > 1) 3928 if (items > 1)
1184 { 3929 {
1185 if (ix) 3930 if (ix)
1186 newprio += coro->prio; 3931 newprio = coro->prio - newprio;
1187 3932
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3933 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3934 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1190 3935
1191 coro->prio = newprio; 3936 coro->prio = newprio;
1192 } 3937 }
1193} 3938}
3939 OUTPUT:
3940 RETVAL
1194 3941
1195void 3942SV *
1196ready (SV *self) 3943ready (SV *self)
1197 PROTOTYPE: $ 3944 PROTOTYPE: $
1198 CODE: 3945 CODE:
1199 api_ready (self); 3946 RETVAL = boolSV (api_ready (aTHX_ self));
3947 OUTPUT:
3948 RETVAL
1200 3949
1201int 3950int
1202nready (...) 3951nready (...)
1203 PROTOTYPE: 3952 PROTOTYPE:
1204 CODE: 3953 CODE:
1205 RETVAL = coro_nready; 3954 RETVAL = coro_nready;
1206 OUTPUT: 3955 OUTPUT:
1207 RETVAL 3956 RETVAL
1208 3957
1209MODULE = Coro::State PACKAGE = Coro::AIO 3958void
3959suspend (Coro::State self)
3960 PROTOTYPE: $
3961 CODE:
3962 self->flags |= CF_SUSPENDED;
3963
3964void
3965resume (Coro::State self)
3966 PROTOTYPE: $
3967 CODE:
3968 self->flags &= ~CF_SUSPENDED;
3969
3970void
3971_pool_handler (...)
3972 CODE:
3973 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3974
3975void
3976async_pool (SV *cv, ...)
3977 PROTOTYPE: &@
3978 PPCODE:
3979{
3980 HV *hv = (HV *)av_pop (av_async_pool);
3981 AV *av = newAV ();
3982 SV *cb = ST (0);
3983 int i;
3984
3985 av_extend (av, items - 2);
3986 for (i = 1; i < items; ++i)
3987 av_push (av, SvREFCNT_inc_NN (ST (i)));
3988
3989 if ((SV *)hv == &PL_sv_undef)
3990 {
3991 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3992 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3993 SvREFCNT_dec (sv);
3994 }
3995
3996 {
3997 struct coro *coro = SvSTATE_hv (hv);
3998
3999 assert (!coro->invoke_cb);
4000 assert (!coro->invoke_av);
4001 coro->invoke_cb = SvREFCNT_inc (cb);
4002 coro->invoke_av = av;
4003 }
4004
4005 api_ready (aTHX_ (SV *)hv);
4006
4007 if (GIMME_V != G_VOID)
4008 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4009 else
4010 SvREFCNT_dec (hv);
4011}
1210 4012
1211SV * 4013SV *
1212_get_state () 4014rouse_cb ()
4015 PROTOTYPE:
1213 CODE: 4016 CODE:
1214{ 4017 RETVAL = coro_new_rouse_cb (aTHX);
1215 struct {
1216 int errorno;
1217 int laststype;
1218 int laststatval;
1219 Stat_t statcache;
1220 } data;
1221
1222 data.errorno = errno;
1223 data.laststype = PL_laststype;
1224 data.laststatval = PL_laststatval;
1225 data.statcache = PL_statcache;
1226
1227 RETVAL = newSVpvn ((char *)&data, sizeof data);
1228}
1229 OUTPUT: 4018 OUTPUT:
1230 RETVAL 4019 RETVAL
1231 4020
1232void 4021void
1233_set_state (char *data_) 4022rouse_wait (...)
4023 PROTOTYPE: ;$
4024 PPCODE:
4025 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4026
4027void
4028on_enter (SV *block)
4029 ALIAS:
4030 on_leave = 1
1234 PROTOTYPE: $ 4031 PROTOTYPE: &
1235 CODE: 4032 CODE:
1236{ 4033{
1237 struct { 4034 struct coro *coro = SvSTATE_current;
4035 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4036
4037 block = s_get_cv_croak (block);
4038
4039 if (!*avp)
4040 *avp = newAV ();
4041
4042 av_push (*avp, SvREFCNT_inc (block));
4043
4044 if (!ix)
4045 on_enterleave_call (aTHX_ block);
4046
4047 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4048 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4049 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4050}
4051
4052
4053MODULE = Coro::State PACKAGE = PerlIO::cede
4054
4055BOOT:
4056 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4057
4058
4059MODULE = Coro::State PACKAGE = Coro::Semaphore
4060
4061SV *
4062new (SV *klass, SV *count = 0)
4063 CODE:
4064{
4065 int semcnt = 1;
4066
4067 if (count)
4068 {
4069 SvGETMAGIC (count);
4070
4071 if (SvOK (count))
4072 semcnt = SvIV (count);
4073 }
4074
4075 RETVAL = sv_bless (
4076 coro_waitarray_new (aTHX_ semcnt),
4077 GvSTASH (CvGV (cv))
4078 );
4079}
4080 OUTPUT:
4081 RETVAL
4082
4083# helper for Coro::Channel and others
4084SV *
4085_alloc (int count)
4086 CODE:
4087 RETVAL = coro_waitarray_new (aTHX_ count);
4088 OUTPUT:
4089 RETVAL
4090
4091SV *
4092count (SV *self)
4093 CODE:
4094 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4095 OUTPUT:
4096 RETVAL
4097
4098void
4099up (SV *self, int adjust = 1)
4100 ALIAS:
4101 adjust = 1
4102 CODE:
4103 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4104
4105void
4106down (...)
4107 CODE:
4108 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4109
4110void
4111wait (...)
4112 CODE:
4113 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4114
4115void
4116try (SV *self)
4117 PPCODE:
4118{
4119 AV *av = (AV *)SvRV (self);
4120 SV *count_sv = AvARRAY (av)[0];
4121 IV count = SvIVX (count_sv);
4122
4123 if (count > 0)
4124 {
4125 --count;
4126 SvIVX (count_sv) = count;
4127 XSRETURN_YES;
4128 }
4129 else
4130 XSRETURN_NO;
4131}
4132
4133void
4134waiters (SV *self)
4135 PPCODE:
4136{
4137 AV *av = (AV *)SvRV (self);
4138 int wcount = AvFILLp (av) + 1 - 1;
4139
4140 if (GIMME_V == G_SCALAR)
4141 XPUSHs (sv_2mortal (newSViv (wcount)));
4142 else
4143 {
1238 int errorno; 4144 int i;
1239 int laststype; 4145 EXTEND (SP, wcount);
1240 int laststatval; 4146 for (i = 1; i <= wcount; ++i)
1241 Stat_t statcache; 4147 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1242 } *data = (void *)data_; 4148 }
1243
1244 errno = data->errorno;
1245 PL_laststype = data->laststype;
1246 PL_laststatval = data->laststatval;
1247 PL_statcache = data->statcache;
1248} 4149}
4150
4151MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4152
4153void
4154_may_delete (SV *sem, int count, unsigned int extra_refs)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (sem);
4158
4159 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4160 && AvFILLp (av) == 0 /* no waiters, just count */
4161 && SvIV (AvARRAY (av)[0]) == count)
4162 XSRETURN_YES;
4163
4164 XSRETURN_NO;
4165}
4166
4167MODULE = Coro::State PACKAGE = Coro::Signal
4168
4169SV *
4170new (SV *klass)
4171 CODE:
4172 RETVAL = sv_bless (
4173 coro_waitarray_new (aTHX_ 0),
4174 GvSTASH (CvGV (cv))
4175 );
4176 OUTPUT:
4177 RETVAL
4178
4179void
4180wait (...)
4181 CODE:
4182 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4183
4184void
4185broadcast (SV *self)
4186 CODE:
4187{
4188 AV *av = (AV *)SvRV (self);
4189 coro_signal_wake (aTHX_ av, AvFILLp (av));
4190}
4191
4192void
4193send (SV *self)
4194 CODE:
4195{
4196 AV *av = (AV *)SvRV (self);
4197
4198 if (AvFILLp (av))
4199 coro_signal_wake (aTHX_ av, 1);
4200 else
4201 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4202}
4203
4204IV
4205awaited (SV *self)
4206 CODE:
4207 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4208 OUTPUT:
4209 RETVAL
4210
4211
4212MODULE = Coro::State PACKAGE = Coro::AnyEvent
4213
4214BOOT:
4215 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4216
4217void
4218_schedule (...)
4219 CODE:
4220{
4221 static int incede;
4222
4223 api_cede_notself (aTHX);
4224
4225 ++incede;
4226 while (coro_nready >= incede && api_cede (aTHX))
4227 ;
4228
4229 sv_setsv (sv_activity, &PL_sv_undef);
4230 if (coro_nready >= incede)
4231 {
4232 PUSHMARK (SP);
4233 PUTBACK;
4234 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4235 }
4236
4237 --incede;
4238}
4239
4240
4241MODULE = Coro::State PACKAGE = Coro::AIO
4242
4243void
4244_register (char *target, char *proto, SV *req)
4245 CODE:
4246{
4247 SV *req_cv = s_get_cv_croak (req);
4248 /* newXSproto doesn't return the CV on 5.8 */
4249 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4250 sv_setpv ((SV *)slf_cv, proto);
4251 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4252}
4253
4254MODULE = Coro::State PACKAGE = Coro::Select
4255
4256void
4257patch_pp_sselect ()
4258 CODE:
4259 if (!coro_old_pp_sselect)
4260 {
4261 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4262 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4263 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4264 }
4265
4266void
4267unpatch_pp_sselect ()
4268 CODE:
4269 if (coro_old_pp_sselect)
4270 {
4271 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4272 coro_old_pp_sselect = 0;
4273 }
4274

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