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Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.406 by root, Sat Jun 11 13:49:00 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
8 18
9#if PATCHLEVEL < 6 19#include <stddef.h>
10# ifndef PL_ppaddr 20#include <stdio.h>
11# define PL_ppaddr ppaddr 21#include <errno.h>
12# endif 22#include <assert.h>
13# ifndef call_sv 23
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST 24#ifndef SVs_PADSTALE
26# define IS_PADCONST(v) 0 25# define SVs_PADSTALE 0
27# endif
28#endif 26#endif
29 27
30#include "libcoro/coro.c" 28#if defined(_WIN32)
31 29# undef HAS_GETTIMEOFDAY
32#include <signal.h> 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 */
36#endif
33 37
34#ifdef HAVE_MMAP 38#ifdef HAVE_MMAP
35# include <unistd.h> 39# include <unistd.h>
36# include <sys/mman.h> 40# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
40# else 44# else
41# undef HAVE_MMAP 45# undef HAVE_MMAP
42# endif 46# endif
43# endif 47# endif
48# include <limits.h>
49# ifndef PAGESIZE
50# define PAGESIZE pagesize
51# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
52static long pagesize;
53# else
54# define BOOT_PAGESIZE (void)0
55# endif
56#else
57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
44#endif 59#endif
45 60
46#define SUB_INIT "Coro::State::initialize" 61#if CORO_USE_VALGRIND
47#define UCORO_STATE "_coro_state" 62# include <valgrind/valgrind.h>
63#endif
48 64
49/* The next macro should declare a variable stacklevel that contains and approximation 65/* the maximum number of idle cctx that will be pooled */
50 * to the current C stack pointer. Its property is that it changes with each call 66static int cctx_max_idle = 4;
51 * and should be unique. */ 67
68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
69# undef CORO_STACKGUARD
70#endif
71
72#ifndef CORO_STACKGUARD
73# define CORO_STACKGUARD 0
74#endif
75
76/* prefer perl internal functions over our own? */
77#ifndef CORO_PREFER_PERL_FUNCTIONS
78# define CORO_PREFER_PERL_FUNCTIONS 0
79#endif
80
81/* The next macros try to return the current stack pointer, in an as
82 * portable way as possible. */
83#if __GNUC__ >= 4
84# define dSTACKLEVEL int stacklevel_dummy
85# define STACKLEVEL __builtin_frame_address (0)
86#else
87# define dSTACKLEVEL volatile void *stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 88# define STACKLEVEL ((void *)&stacklevel)
89#endif
53 90
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 91#define IN_DESTRUCT PL_dirty
55
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57 92
58#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
59 95
60#ifdef USE_ITHREADS 96#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 97# if CORO_PTHREAD
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 98static void *coro_thx;
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 99# endif
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif 100#endif
68 101
102/* used in state.h */
103#define VAR(name,type) VARx(name, PL_ ## name, type)
104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
122
123static U32 cctx_gen;
124static size_t cctx_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
127static JMPENV *main_top_env;
71static HV *coro_state_stash; 128static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 130
76/* this is actually not only the c stack but also c registers etc... */ 131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
134
135static GV *irsgv; /* $/ */
136static GV *stdoutgv; /* *STDOUT */
137static SV *rv_diehook;
138static SV *rv_warnhook;
139static HV *hv_sig; /* %SIG */
140
141/* async_pool helper stuff */
142static SV *sv_pool_rss;
143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157
158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle;
160
161enum
162{
163 CC_MAPPED = 0x01,
164 CC_NOREUSE = 0x02, /* throw this away after tracing */
165 CC_TRACE = 0x04,
166 CC_TRACE_SUB = 0x08, /* trace sub calls */
167 CC_TRACE_LINE = 0x10, /* trace each statement */
168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
169};
170
171/* this is a structure representing a c-level coroutine */
77typedef struct { 172typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 173{
79 int usecnt; /* shared by how many coroutines */ 174 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 175
176 /* the stack */
177 void *sptr;
178 size_t ssize;
179
180 /* cpu state */
181 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
182 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
183 JMPENV *top_env;
82 coro_context cctx; 184 coro_context cctx;
83 185
84 void *sptr; 186 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 187#if CORO_USE_VALGRIND
86} coro_stack; 188 int valgrind_id;
189#endif
190 unsigned char flags;
191} coro_cctx;
87 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
199enum
200{
201 CF_RUNNING = 0x0001, /* coroutine is running */
202 CF_READY = 0x0002, /* coroutine is ready */
203 CF_NEW = 0x0004, /* has never been switched to */
204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
207};
208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212#define VARx(name,expr,type) type name;
213# include "state.h"
214#undef VARx
215} perl_slots;
216
217// how many context stack entries do we need for perl_slots
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219
220/* this is a structure representing a perl-level coroutine */
88struct coro { 221struct coro
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 222{
90 JMPENV start_env; 223 /* the C coroutine allocated to this perl coroutine, if any */
224 coro_cctx *cctx;
91 225
92 /* the optional C context */ 226 /* ready queue */
93 coro_stack *stack; 227 struct coro *next_ready;
94 void *cursp;
95 int gencnt;
96 228
97 /* optionally saved, might be zero */ 229 /* state data */
98 AV *defav; 230 struct CoroSLF slf_frame; /* saved slf frame */
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 231 AV *mainstack;
110 SV **stack_sp; 232 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 233
234 CV *startcv; /* the CV to execute */
135 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
136 AV *args; 236 int flags; /* CF_ flags */
237 HV *hv; /* the perl hash associated with this coro, if any */
238
239 /* statistics */
240 int usecount; /* number of transfers to this coro */
241
242 /* coro process data */
243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
248
249 /* async_pool */
250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
263
264 /* linked list */
265 struct coro *next, *prev;
137}; 266};
138 267
139typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
141 270
142/* mostly copied from op.c:cv_clone2 */ 271/* the following variables are effectively part of the perl context */
143STATIC AV * 272/* and get copied between struct coro and these variables */
144clone_padlist (pTHX_ AV *protopadlist) 273/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275
276/** Coro ********************************************************************/
277
278#define CORO_PRIO_MAX 3
279#define CORO_PRIO_HIGH 1
280#define CORO_PRIO_NORMAL 0
281#define CORO_PRIO_LOW -1
282#define CORO_PRIO_IDLE -3
283#define CORO_PRIO_MIN -4
284
285/* for Coro.pm */
286static SV *coro_current;
287static SV *coro_readyhook;
288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 #ifndef CORO_JIT_TYPE
297 #if __x86_64 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
298 #define CORO_JIT_TYPE "amd64-unix"
299 typedef void (*load_save_perl_slots_type)(perl_slots *);
300 #else
301 #undef CORO_JIT
302 #endif
303 #endif
304#endif
305
306#if CORO_JIT
307static load_save_perl_slots_type load_perl_slots, save_perl_slots;
308#endif
309
310/** Coro::Select ************************************************************/
311
312static OP *(*coro_old_pp_sselect) (pTHX);
313static SV *coro_select_select;
314
315/* horrible hack, but if it works... */
316static OP *
317coro_pp_sselect (pTHX)
145{ 318{
146 AV *av; 319 dSP;
147 I32 ix; 320 PUSHMARK (SP - 4); /* fake argument list */
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 321 XPUSHs (coro_select_select);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 322 PUTBACK;
150 SV **pname = AvARRAY (protopad_name); 323
151 SV **ppad = AvARRAY (protopad); 324 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
152 I32 fname = AvFILLp (protopad_name); 325 PL_op->op_flags |= OPf_STACKED;
153 I32 fpad = AvFILLp (protopad); 326 PL_op->op_private = 0;
327 return PL_ppaddr [OP_ENTERSUB](aTHX);
328}
329
330/** time stuff **************************************************************/
331
332#ifdef HAS_GETTIMEOFDAY
333
334ECB_INLINE void
335coro_u2time (pTHX_ UV ret[2])
336{
337 struct timeval tv;
338 gettimeofday (&tv, 0);
339
340 ret [0] = tv.tv_sec;
341 ret [1] = tv.tv_usec;
342}
343
344ECB_INLINE double
345coro_nvtime ()
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 return tv.tv_sec + tv.tv_usec * 1e-6;
351}
352
353ECB_INLINE void
354time_init (pTHX)
355{
356 nvtime = coro_nvtime;
357 u2time = coro_u2time;
358}
359
360#else
361
362ECB_INLINE void
363time_init (pTHX)
364{
365 SV **svp;
366
367 require_pv ("Time/HiRes.pm");
368
369 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
370
371 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
372 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
373
374 nvtime = INT2PTR (double (*)(), SvIV (*svp));
375
376 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
377 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
378}
379
380#endif
381
382/** lowlevel stuff **********************************************************/
383
384static SV * ecb_noinline
385coro_get_sv (pTHX_ const char *name, int create)
386{
387#if PERL_VERSION_ATLEAST (5,10,0)
388 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
389 get_sv (name, create);
390#endif
391 return get_sv (name, create);
392}
393
394static AV * ecb_noinline
395coro_get_av (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_av (name, create);
400#endif
401 return get_av (name, create);
402}
403
404static HV * ecb_noinline
405coro_get_hv (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_hv (name, create);
410#endif
411 return get_hv (name, create);
412}
413
414ECB_INLINE void
415coro_times_update ()
416{
417#ifdef coro_clock_gettime
418 struct timespec ts;
419
420 ts.tv_sec = ts.tv_nsec = 0;
421 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
422 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
426 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
427#else
428 dTHX;
429 UV tv[2];
430
431 u2time (aTHX_ tv);
432 time_real [0] = tv [0];
433 time_real [1] = tv [1] * 1000;
434#endif
435}
436
437ECB_INLINE void
438coro_times_add (struct coro *c)
439{
440 c->t_real [1] += time_real [1];
441 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
442 c->t_real [0] += time_real [0];
443
444 c->t_cpu [1] += time_cpu [1];
445 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
446 c->t_cpu [0] += time_cpu [0];
447}
448
449ECB_INLINE void
450coro_times_sub (struct coro *c)
451{
452 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
453 c->t_real [1] -= time_real [1];
454 c->t_real [0] -= time_real [0];
455
456 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
457 c->t_cpu [1] -= time_cpu [1];
458 c->t_cpu [0] -= time_cpu [0];
459}
460
461/*****************************************************************************/
462/* magic glue */
463
464#define CORO_MAGIC_type_cv 26
465#define CORO_MAGIC_type_state PERL_MAGIC_ext
466
467#define CORO_MAGIC_NN(sv, type) \
468 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
469 ? SvMAGIC (sv) \
470 : mg_find (sv, type))
471
472#define CORO_MAGIC(sv, type) \
473 (ecb_expect_true (SvMAGIC (sv)) \
474 ? CORO_MAGIC_NN (sv, type) \
475 : 0)
476
477#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
478#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
479
480ECB_INLINE MAGIC *
481SvSTATEhv_p (pTHX_ SV *coro)
482{
483 MAGIC *mg;
484
485 if (ecb_expect_true (
486 SvTYPE (coro) == SVt_PVHV
487 && (mg = CORO_MAGIC_state (coro))
488 && mg->mg_virtual == &coro_state_vtbl
489 ))
490 return mg;
491
492 return 0;
493}
494
495ECB_INLINE struct coro *
496SvSTATE_ (pTHX_ SV *coro)
497{
498 MAGIC *mg;
499
500 if (SvROK (coro))
501 coro = SvRV (coro);
502
503 mg = SvSTATEhv_p (aTHX_ coro);
504 if (!mg)
505 croak ("Coro::State object required");
506
507 return (struct coro *)mg->mg_ptr;
508}
509
510#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
511
512/* faster than SvSTATE, but expects a coroutine hv */
513#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
514#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
515
516/*****************************************************************************/
517/* padlist management and caching */
518
519ECB_INLINE AV *
520coro_derive_padlist (pTHX_ CV *cv)
521{
522 AV *padlist = CvPADLIST (cv);
154 AV *newpadlist, *newpad_name, *newpad; 523 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 524
165 newpadlist = newAV (); 525 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 526 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 527#if PERL_VERSION_ATLEAST (5,10,0)
528 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
529#else
530 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
531#endif
532 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
533 --AvFILLp (padlist);
534
535 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
168 av_store (newpadlist, 1, (SV *) newpad); 536 av_store (newpadlist, 1, (SV *)newpad);
169 537
170 av = newAV (); /* will be @_ */ 538 return newpadlist;
171 av_extend (av, 0); 539}
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174 540
175 for (ix = fpad; ix > 0; ix--) 541ECB_INLINE void
542free_padlist (pTHX_ AV *padlist)
543{
544 /* may be during global destruction */
545 if (!IN_DESTRUCT)
176 { 546 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 547 I32 i = AvFILLp (padlist);
178 548
179 if (namesv && namesv != &PL_sv_undef) 549 while (i > 0) /* special-case index 0 */
180 { 550 {
181 char *name = SvPVX (namesv); /* XXX */ 551 /* we try to be extra-careful here */
552 AV *av = (AV *)AvARRAY (padlist)[i--];
553 I32 j = AvFILLp (av);
182 554
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 555 while (j >= 0)
184 { /* lexical from outside? */ 556 SvREFCNT_dec (AvARRAY (av)[j--]);
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198 557
199#ifdef SvPADBUSY 558 AvFILLp (av) = -1;
200 if (!SvPADBUSY (sv)) 559 SvREFCNT_dec (av);
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 } 560 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218 561
219#if 0 /* return -ENOTUNDERSTOOD */ 562 SvREFCNT_dec (AvARRAY (padlist)[0]);
220 /* Now that vars are all in place, clone nested closures. */
221 563
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238
239 return newpadlist;
240}
241
242STATIC void
243free_padlist (pTHX_ AV *padlist)
244{
245 /* may be during global destruction */
246 if (SvREFCNT (padlist))
247 {
248 I32 i = AvFILLp (padlist); 564 AvFILLp (padlist) = -1;
249 while (i >= 0)
250 {
251 SV **svp = av_fetch (padlist, i--, FALSE);
252 if (svp)
253 {
254 SV *sv;
255 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
256 SvREFCNT_dec (sv);
257
258 SvREFCNT_dec (*svp);
259 }
260 }
261
262 SvREFCNT_dec ((SV*)padlist); 565 SvREFCNT_dec ((SV*)padlist);
263 } 566 }
264} 567}
265 568
266STATIC int 569static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 570coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 571{
269 AV *padlist; 572 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 573 AV *av = (AV *)mg->mg_obj;
574
575 /* perl manages to free our internal AV and _then_ call us */
576 if (IN_DESTRUCT)
577 return 0;
271 578
272 /* casting is fun. */ 579 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 580 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 581 free_padlist (aTHX_ padlist);
275 582
276 SvREFCNT_dec (av); 583 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
277}
278 584
279#define PERL_MAGIC_coro PERL_MAGIC_ext 585 return 0;
586}
280 587
281static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 588static MGVTBL coro_cv_vtbl = {
589 0, 0, 0, 0,
590 coro_cv_free
591};
282 592
283/* the next two functions merely cache the padlists */ 593/* the next two functions merely cache the padlists */
284STATIC void 594ECB_INLINE void
285get_padlist (pTHX_ CV *cv) 595get_padlist (pTHX_ CV *cv)
286{ 596{
287 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 597 MAGIC *mg = CORO_MAGIC_cv (cv);
598 AV *av;
288 599
289 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 600 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 601 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291 else 602 else
603 {
604#if CORO_PREFER_PERL_FUNCTIONS
605 /* this is probably cleaner? but also slower! */
606 /* in practise, it seems to be less stable */
607 CV *cp = Perl_cv_clone (aTHX_ cv);
608 CvPADLIST (cv) = CvPADLIST (cp);
609 CvPADLIST (cp) = 0;
610 SvREFCNT_dec (cp);
611#else
292 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 612 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
613#endif
614 }
293} 615}
294 616
295STATIC void 617ECB_INLINE void
296put_padlist (pTHX_ CV *cv) 618put_padlist (pTHX_ CV *cv)
297{ 619{
298 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 620 MAGIC *mg = CORO_MAGIC_cv (cv);
621 AV *av;
299 622
300 if (!mg) 623 if (ecb_expect_false (!mg))
624 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
625
626 av = (AV *)mg->mg_obj;
627
628 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
629 av_extend (av, AvFILLp (av) + 1);
630
631 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
632}
633
634/** load & save, init *******************************************************/
635
636/* swap sv heads, at least logically */
637static void
638swap_svs (pTHX_ Coro__State c)
639{
640 int i;
641
642 for (i = 0; i <= AvFILLp (c->swap_sv); )
643 {
644 SV *a = AvARRAY (c->swap_sv)[i++];
645 SV *b = AvARRAY (c->swap_sv)[i++];
646
647 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
648 SV tmp;
649
650 /* swap sv_any */
651 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
652
653 /* swap sv_flags */
654 SvFLAGS (&tmp) = SvFLAGS (a);
655 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
656 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
657
658#if PERL_VERSION_ATLEAST (5,10,0)
659 /* perl 5.10 complicates this _quite_ a bit, but it also is
660 * much faster, so no quarrels here. alternatively, we could
661 * sv_upgrade to avoid this.
662 */
301 { 663 {
302 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 664 /* swap sv_u */
303 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 665 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
304 mg->mg_virtual = &vtbl_coro; 666
305 mg->mg_obj = (SV *)newAV (); 667 /* if SvANY points to the head, we need to adjust the pointers,
668 * as the pointer for a still points to b, and maybe vice versa.
669 */
670 #define svany_in_head(type) \
671 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
672
673 if (svany_in_head (SvTYPE (a)))
674 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
675
676 if (svany_in_head (SvTYPE (b)))
677 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
306 } 678 }
307 679#endif
308 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 680 }
309} 681}
310 682
311#define SB do { 683#define SWAP_SVS(coro) \
312#define SE } while (0) 684 if (ecb_expect_false ((coro)->swap_sv)) \
685 swap_svs (aTHX_ (coro))
313 686
314#define LOAD(state) load_state(aTHX_ (state));
315#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
316
317#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
318
319static void 687static void
688on_enterleave_call (pTHX_ SV *cb);
689
690static void
320load_state(pTHX_ Coro__State c) 691load_perl (pTHX_ Coro__State c)
321{ 692{
322 PL_dowarn = c->dowarn; 693 perl_slots *slot = c->slot;
323 PL_in_eval = c->in_eval; 694 c->slot = 0;
324 695
325 PL_curstackinfo = c->curstackinfo;
326 PL_curstack = c->curstack;
327 PL_mainstack = c->mainstack; 696 PL_mainstack = c->mainstack;
328 PL_stack_sp = c->stack_sp;
329 PL_op = c->op;
330 PL_curpad = c->curpad;
331 PL_comppad = c->comppad;
332 PL_stack_base = c->stack_base;
333 PL_stack_max = c->stack_max;
334 PL_tmps_stack = c->tmps_stack;
335 PL_tmps_floor = c->tmps_floor;
336 PL_tmps_ix = c->tmps_ix;
337 PL_tmps_max = c->tmps_max;
338 PL_markstack = c->markstack;
339 PL_markstack_ptr = c->markstack_ptr;
340 PL_markstack_max = c->markstack_max;
341 PL_scopestack = c->scopestack;
342 PL_scopestack_ix = c->scopestack_ix;
343 PL_scopestack_max = c->scopestack_max;
344 PL_savestack = c->savestack;
345 PL_savestack_ix = c->savestack_ix;
346 PL_savestack_max = c->savestack_max;
347 PL_retstack = c->retstack;
348 PL_retstack_ix = c->retstack_ix;
349 PL_retstack_max = c->retstack_max;
350 PL_curcop = c->curcop;
351 PL_top_env = c->top_env;
352 697
353 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 698#if CORO_JIT
354 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 699 load_perl_slots (slot);
355 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 700#else
701 #define VARx(name,expr,type) expr = slot->name;
702 # include "state.h"
703 #undef VARx
704#endif
356 705
357 { 706 {
358 dSP; 707 dSP;
708
359 CV *cv; 709 CV *cv;
360 710
361 /* now do the ugly restore mess */ 711 /* now do the ugly restore mess */
362 while ((cv = (CV *)POPs)) 712 while (ecb_expect_true (cv = (CV *)POPs))
363 { 713 {
364 AV *padlist = (AV *)POPs;
365
366 if (padlist)
367 {
368 put_padlist (aTHX_ cv); /* mark this padlist as available */ 714 put_padlist (aTHX_ cv); /* mark this padlist as available */
369 CvPADLIST(cv) = padlist; 715 CvDEPTH (cv) = PTR2IV (POPs);
370 } 716 CvPADLIST (cv) = (AV *)POPs;
371
372 ++CvDEPTH(cv);
373 } 717 }
374 718
375 PUTBACK; 719 PUTBACK;
376 } 720 }
377}
378 721
722 slf_frame = c->slf_frame;
723 CORO_THROW = c->except;
724
725 if (ecb_expect_false (enable_times))
726 {
727 if (ecb_expect_false (!times_valid))
728 coro_times_update ();
729
730 coro_times_sub (c);
731 }
732
733 if (ecb_expect_false (c->on_enter))
734 {
735 int i;
736
737 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
738 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
739 }
740
741 SWAP_SVS (c);
742}
743
379static void 744static void
380save_state(pTHX_ Coro__State c, int flags) 745save_perl (pTHX_ Coro__State c)
381{ 746{
747 SWAP_SVS (c);
748
749 if (ecb_expect_false (c->on_leave))
750 {
751 int i;
752
753 for (i = AvFILLp (c->on_leave); i >= 0; --i)
754 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
755 }
756
757 times_valid = 0;
758
759 if (ecb_expect_false (enable_times))
760 {
761 coro_times_update (); times_valid = 1;
762 coro_times_add (c);
763 }
764
765 c->except = CORO_THROW;
766 c->slf_frame = slf_frame;
767
382 { 768 {
383 dSP; 769 dSP;
384 I32 cxix = cxstack_ix; 770 I32 cxix = cxstack_ix;
385 PERL_CONTEXT *ccstk = cxstack; 771 PERL_CONTEXT *ccstk = cxstack;
386 PERL_SI *top_si = PL_curstackinfo; 772 PERL_SI *top_si = PL_curstackinfo;
… …
388 /* 774 /*
389 * the worst thing you can imagine happens first - we have to save 775 * the worst thing you can imagine happens first - we have to save
390 * (and reinitialize) all cv's in the whole callchain :( 776 * (and reinitialize) all cv's in the whole callchain :(
391 */ 777 */
392 778
393 PUSHs (Nullsv); 779 XPUSHs (Nullsv);
394 /* this loop was inspired by pp_caller */ 780 /* this loop was inspired by pp_caller */
395 for (;;) 781 for (;;)
396 { 782 {
397 while (cxix >= 0) 783 while (ecb_expect_true (cxix >= 0))
398 { 784 {
399 PERL_CONTEXT *cx = &ccstk[cxix--]; 785 PERL_CONTEXT *cx = &ccstk[cxix--];
400 786
401 if (CxTYPE(cx) == CXt_SUB) 787 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
402 { 788 {
403 CV *cv = cx->blk_sub.cv; 789 CV *cv = cx->blk_sub.cv;
790
404 if (CvDEPTH(cv)) 791 if (ecb_expect_true (CvDEPTH (cv)))
405 { 792 {
406 EXTEND (SP, CvDEPTH(cv)*2); 793 EXTEND (SP, 3);
407
408 while (--CvDEPTH(cv))
409 {
410 /* this tells the restore code to increment CvDEPTH */
411 PUSHs (Nullsv);
412 PUSHs ((SV *)cv);
413 }
414
415 PUSHs ((SV *)CvPADLIST(cv)); 794 PUSHs ((SV *)CvPADLIST (cv));
795 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
416 PUSHs ((SV *)cv); 796 PUSHs ((SV *)cv);
417 797
798 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); /* this is a monster */ 799 get_padlist (aTHX_ cv);
419 } 800 }
420 } 801 }
421#ifdef CXt_FORMAT
422 else if (CxTYPE(cx) == CXt_FORMAT)
423 {
424 /* I never used formats, so how should I know how these are implemented? */
425 /* my bold guess is as a simple, plain sub... */
426 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
427 }
428#endif
429 } 802 }
430 803
431 if (top_si->si_type == PERLSI_MAIN) 804 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
432 break; 805 break;
433 806
434 top_si = top_si->si_prev; 807 top_si = top_si->si_prev;
435 ccstk = top_si->si_cxstack; 808 ccstk = top_si->si_cxstack;
436 cxix = top_si->si_cxix; 809 cxix = top_si->si_cxix;
437 } 810 }
438 811
439 PUTBACK; 812 PUTBACK;
440 } 813 }
441 814
442 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 815 /* allocate some space on the context stack for our purposes */
443 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 816 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
444 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 817 {
818 unsigned int i;
445 819
446 c->dowarn = PL_dowarn; 820 for (i = 0; i < SLOT_COUNT; ++i)
447 c->in_eval = PL_in_eval; 821 CXINC;
448 822
449 c->curstackinfo = PL_curstackinfo; 823 cxstack_ix -= SLOT_COUNT; /* undo allocation */
450 c->curstack = PL_curstack; 824 }
825
451 c->mainstack = PL_mainstack; 826 c->mainstack = PL_mainstack;
452 c->stack_sp = PL_stack_sp; 827
453 c->op = PL_op; 828 {
454 c->curpad = PL_curpad; 829 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
455 c->comppad = PL_comppad; 830
456 c->stack_base = PL_stack_base; 831#if CORO_JIT
457 c->stack_max = PL_stack_max; 832 save_perl_slots (slot);
458 c->tmps_stack = PL_tmps_stack; 833#else
459 c->tmps_floor = PL_tmps_floor; 834 #define VARx(name,expr,type) slot->name = expr;
460 c->tmps_ix = PL_tmps_ix; 835 # include "state.h"
461 c->tmps_max = PL_tmps_max; 836 #undef VARx
462 c->markstack = PL_markstack; 837#endif
463 c->markstack_ptr = PL_markstack_ptr; 838 }
464 c->markstack_max = PL_markstack_max;
465 c->scopestack = PL_scopestack;
466 c->scopestack_ix = PL_scopestack_ix;
467 c->scopestack_max = PL_scopestack_max;
468 c->savestack = PL_savestack;
469 c->savestack_ix = PL_savestack_ix;
470 c->savestack_max = PL_savestack_max;
471 c->retstack = PL_retstack;
472 c->retstack_ix = PL_retstack_ix;
473 c->retstack_max = PL_retstack_max;
474 c->curcop = PL_curcop;
475 c->top_env = PL_top_env;
476} 839}
477 840
478/* 841/*
479 * allocate various perl stacks. This is an exact copy 842 * allocate various perl stacks. This is almost an exact copy
480 * of perl.c:init_stacks, except that it uses less memory 843 * of perl.c:init_stacks, except that it uses less memory
481 * on the (sometimes correct) assumption that coroutines do 844 * on the (sometimes correct) assumption that coroutines do
482 * not usually need a lot of stackspace. 845 * not usually need a lot of stackspace.
483 */ 846 */
484STATIC void 847#if CORO_PREFER_PERL_FUNCTIONS
848# define coro_init_stacks(thx) init_stacks ()
849#else
850static void
485coro_init_stacks (pTHX) 851coro_init_stacks (pTHX)
486{ 852{
487 LOCK; 853 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
488
489 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
490 PL_curstackinfo->si_type = PERLSI_MAIN; 854 PL_curstackinfo->si_type = PERLSI_MAIN;
491 PL_curstack = PL_curstackinfo->si_stack; 855 PL_curstack = PL_curstackinfo->si_stack;
492 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 856 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493 857
494 PL_stack_base = AvARRAY(PL_curstack); 858 PL_stack_base = AvARRAY(PL_curstack);
495 PL_stack_sp = PL_stack_base; 859 PL_stack_sp = PL_stack_base;
496 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 860 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497 861
498 New(50,PL_tmps_stack,96,SV*); 862 New(50,PL_tmps_stack,32,SV*);
499 PL_tmps_floor = -1; 863 PL_tmps_floor = -1;
500 PL_tmps_ix = -1; 864 PL_tmps_ix = -1;
501 PL_tmps_max = 96; 865 PL_tmps_max = 32;
502 866
503 New(54,PL_markstack,16,I32); 867 New(54,PL_markstack,16,I32);
504 PL_markstack_ptr = PL_markstack; 868 PL_markstack_ptr = PL_markstack;
505 PL_markstack_max = PL_markstack + 16; 869 PL_markstack_max = PL_markstack + 16;
506 870
507#ifdef SET_MARK_OFFSET 871#ifdef SET_MARK_OFFSET
508 SET_MARK_OFFSET; 872 SET_MARK_OFFSET;
509#endif 873#endif
510 874
511 New(54,PL_scopestack,16,I32); 875 New(54,PL_scopestack,8,I32);
512 PL_scopestack_ix = 0; 876 PL_scopestack_ix = 0;
513 PL_scopestack_max = 16; 877 PL_scopestack_max = 8;
514 878
515 New(54,PL_savestack,96,ANY); 879 New(54,PL_savestack,24,ANY);
516 PL_savestack_ix = 0; 880 PL_savestack_ix = 0;
517 PL_savestack_max = 96; 881 PL_savestack_max = 24;
518 882
883#if !PERL_VERSION_ATLEAST (5,10,0)
519 New(54,PL_retstack,8,OP*); 884 New(54,PL_retstack,4,OP*);
520 PL_retstack_ix = 0; 885 PL_retstack_ix = 0;
521 PL_retstack_max = 8; 886 PL_retstack_max = 4;
522 887#endif
523 UNLOCK;
524} 888}
889#endif
525 890
526/* 891/*
527 * destroy the stacks, the callchain etc... 892 * destroy the stacks, the callchain etc...
528 */ 893 */
529STATIC void 894static void
530destroy_stacks(pTHX) 895coro_destruct_stacks (pTHX)
531{ 896{
532 if (!IN_DESTRUCT)
533 {
534 /* is this ugly, I ask? */
535 LEAVE_SCOPE (0);
536
537 /* sure it is, but more important: is it correct?? :/ */
538 FREETMPS;
539
540 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
541 }
542
543 while (PL_curstackinfo->si_next) 897 while (PL_curstackinfo->si_next)
544 PL_curstackinfo = PL_curstackinfo->si_next; 898 PL_curstackinfo = PL_curstackinfo->si_next;
545 899
546 while (PL_curstackinfo) 900 while (PL_curstackinfo)
547 { 901 {
548 PERL_SI *p = PL_curstackinfo->si_prev; 902 PERL_SI *p = PL_curstackinfo->si_prev;
549 903
550 { /*D*//*remove*/
551 dSP;
552 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
553 PUTBACK; /* possibly superfluous */
554 }
555
556 if (!IN_DESTRUCT) 904 if (!IN_DESTRUCT)
557 {
558 dounwind (-1);/*D*//*remove*/
559 SvREFCNT_dec (PL_curstackinfo->si_stack); 905 SvREFCNT_dec (PL_curstackinfo->si_stack);
560 }
561 906
562 Safefree (PL_curstackinfo->si_cxstack); 907 Safefree (PL_curstackinfo->si_cxstack);
563 Safefree (PL_curstackinfo); 908 Safefree (PL_curstackinfo);
564 PL_curstackinfo = p; 909 PL_curstackinfo = p;
565 } 910 }
566 911
567 Safefree (PL_tmps_stack); 912 Safefree (PL_tmps_stack);
568 Safefree (PL_markstack); 913 Safefree (PL_markstack);
569 Safefree (PL_scopestack); 914 Safefree (PL_scopestack);
570 Safefree (PL_savestack); 915 Safefree (PL_savestack);
916#if !PERL_VERSION_ATLEAST (5,10,0)
571 Safefree (PL_retstack); 917 Safefree (PL_retstack);
572}
573
574static void
575allocate_stack (Coro__State ctx, int alloc)
576{
577 coro_stack *stack;
578
579 New (0, stack, 1, coro_stack);
580
581 stack->refcnt = 1;
582 stack->usecnt = 1;
583 stack->gencnt = ctx->gencnt = 0;
584
585 if (alloc)
586 {
587#if HAVE_MMAP
588 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590 if (stack->sptr == (void *)-1)
591#endif 918#endif
919}
920
921#define CORO_RSS \
922 rss += sizeof (SYM (curstackinfo)); \
923 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
924 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
925 rss += SYM (tmps_max) * sizeof (SV *); \
926 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
927 rss += SYM (scopestack_max) * sizeof (I32); \
928 rss += SYM (savestack_max) * sizeof (ANY);
929
930static size_t
931coro_rss (pTHX_ struct coro *coro)
932{
933 size_t rss = sizeof (*coro);
934
935 if (coro->mainstack)
936 {
937 if (coro->flags & CF_RUNNING)
592 { 938 {
593 /*FIXME*//*D*//* reasonable stack size! */ 939 #define SYM(sym) PL_ ## sym
594 stack->ssize = - (8192 * sizeof (long)); 940 CORO_RSS;
595 New (0, stack->sptr, 8192, long); 941 #undef SYM
596 } 942 }
597 }
598 else 943 else
599 stack->sptr = 0;
600
601 ctx->stack = stack;
602}
603
604static void
605deallocate_stack (Coro__State ctx)
606{
607 coro_stack *stack = ctx->stack;
608
609 ctx->stack = 0;
610
611 if (stack)
612 {
613 if (!--stack->refcnt)
614 { 944 {
615#ifdef HAVE_MMAP 945 #define SYM(sym) coro->slot->sym
616 if (stack->ssize > 0 && stack->sptr) 946 CORO_RSS;
617 munmap (stack->sptr, stack->ssize); 947 #undef SYM
618 else 948 }
949 }
950
951 return rss;
952}
953
954/** coroutine stack handling ************************************************/
955
956static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
957static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
958static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
959
960/* apparently < 5.8.8 */
961#ifndef MgPV_nolen_const
962#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
963 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
964 (const char*)(mg)->mg_ptr)
619#endif 965#endif
620 Safefree (stack->sptr);
621 966
622 Safefree (stack); 967/*
968 * This overrides the default magic get method of %SIG elements.
969 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
970 * and instead of trying to save and restore the hash elements (extremely slow),
971 * we just provide our own readback here.
972 */
973static int ecb_cold
974coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
975{
976 const char *s = MgPV_nolen_const (mg);
977
978 if (*s == '_')
979 {
980 SV **svp = 0;
981
982 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
983 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
984
985 if (svp)
986 {
987 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
988 return 0;
623 } 989 }
624 else if (ctx->gencnt == stack->gencnt) 990 }
625 --stack->usecnt; 991
992 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
993}
994
995static int ecb_cold
996coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
997{
998 const char *s = MgPV_nolen_const (mg);
999
1000 if (*s == '_')
626 } 1001 {
627} 1002 SV **svp = 0;
628 1003
1004 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1005 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1006
1007 if (svp)
1008 {
1009 SV *old = *svp;
1010 *svp = 0;
1011 SvREFCNT_dec (old);
1012 return 0;
1013 }
1014 }
1015
1016 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1017}
1018
1019static int ecb_cold
1020coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1021{
1022 const char *s = MgPV_nolen_const (mg);
1023
1024 if (*s == '_')
1025 {
1026 SV **svp = 0;
1027
1028 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1029 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1030
1031 if (svp)
1032 {
1033 SV *old = *svp;
1034 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1035 SvREFCNT_dec (old);
1036 return 0;
1037 }
1038 }
1039
1040 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1041}
1042
1043static void
1044prepare_nop (pTHX_ struct coro_transfer_args *ta)
1045{
1046 /* kind of mega-hacky, but works */
1047 ta->next = ta->prev = (struct coro *)ta;
1048}
1049
629static void 1050static int
630setup_coro (void *arg) 1051slf_check_nop (pTHX_ struct CoroSLF *frame)
1052{
1053 return 0;
1054}
1055
1056static int
1057slf_check_repeat (pTHX_ struct CoroSLF *frame)
1058{
1059 return 1;
1060}
1061
1062static UNOP init_perl_op;
1063
1064ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1065init_perl (pTHX_ struct coro *coro)
631{ 1066{
632 /* 1067 /*
633 * emulate part of the perl startup here. 1068 * emulate part of the perl startup here.
634 */ 1069 */
1070 coro_init_stacks (aTHX);
1071
1072 PL_runops = RUNOPS_DEFAULT;
1073 PL_curcop = &PL_compiling;
1074 PL_in_eval = EVAL_NULL;
1075 PL_comppad = 0;
1076 PL_comppad_name = 0;
1077 PL_comppad_name_fill = 0;
1078 PL_comppad_name_floor = 0;
1079 PL_curpm = 0;
1080 PL_curpad = 0;
1081 PL_localizing = 0;
1082 PL_restartop = 0;
1083#if PERL_VERSION_ATLEAST (5,10,0)
1084 PL_parser = 0;
1085#endif
1086 PL_hints = 0;
1087
1088 /* recreate the die/warn hooks */
1089 PL_diehook = SvREFCNT_inc (rv_diehook);
1090 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1091
1092 GvSV (PL_defgv) = newSV (0);
1093 GvAV (PL_defgv) = coro->args; coro->args = 0;
1094 GvSV (PL_errgv) = newSV (0);
1095 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1096 GvHV (PL_hintgv) = 0;
1097 PL_rs = newSVsv (GvSV (irsgv));
1098 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1099
1100 {
1101 dSP;
1102 UNOP myop;
1103
1104 Zero (&myop, 1, UNOP);
1105 myop.op_next = Nullop;
1106 myop.op_type = OP_ENTERSUB;
1107 myop.op_flags = OPf_WANT_VOID;
1108
1109 PUSHMARK (SP);
1110 PUSHs ((SV *)coro->startcv);
1111 PUTBACK;
1112 PL_op = (OP *)&myop;
1113 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1114 }
1115
1116 /* this newly created coroutine might be run on an existing cctx which most
1117 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1118 */
1119 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1120 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1121 slf_frame.destroy = 0;
1122
1123 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1124 init_perl_op.op_next = PL_op;
1125 init_perl_op.op_type = OP_ENTERSUB;
1126 init_perl_op.op_ppaddr = pp_slf;
1127 /* no flags etc. required, as an init function won't be called */
1128
1129 PL_op = (OP *)&init_perl_op;
1130
1131 /* copy throw, in case it was set before init_perl */
1132 CORO_THROW = coro->except;
1133
1134 SWAP_SVS (coro);
1135
1136 if (ecb_expect_false (enable_times))
1137 {
1138 coro_times_update ();
1139 coro_times_sub (coro);
1140 }
1141}
1142
1143static void
1144coro_unwind_stacks (pTHX)
1145{
1146 if (!IN_DESTRUCT)
1147 {
1148 /* restore all saved variables and stuff */
1149 LEAVE_SCOPE (0);
1150 assert (PL_tmps_floor == -1);
1151
1152 /* free all temporaries */
1153 FREETMPS;
1154 assert (PL_tmps_ix == -1);
1155
1156 /* unwind all extra stacks */
1157 POPSTACK_TO (PL_mainstack);
1158
1159 /* unwind main stack */
1160 dounwind (-1);
1161 }
1162}
1163
1164static void
1165destroy_perl (pTHX_ struct coro *coro)
1166{
1167 SV *svf [9];
1168
1169 {
1170 SV *old_current = SvRV (coro_current);
1171 struct coro *current = SvSTATE (old_current);
1172
1173 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1174
1175 save_perl (aTHX_ current);
1176
1177 /* this will cause transfer_check to croak on block*/
1178 SvRV_set (coro_current, (SV *)coro->hv);
1179
1180 load_perl (aTHX_ coro);
1181
1182 coro_unwind_stacks (aTHX);
1183
1184 /* restore swapped sv's */
1185 SWAP_SVS (coro);
1186
1187 coro_destruct_stacks (aTHX);
1188
1189 // now save some sv's to be free'd later
1190 svf [0] = GvSV (PL_defgv);
1191 svf [1] = (SV *)GvAV (PL_defgv);
1192 svf [2] = GvSV (PL_errgv);
1193 svf [3] = (SV *)PL_defoutgv;
1194 svf [4] = PL_rs;
1195 svf [5] = GvSV (irsgv);
1196 svf [6] = (SV *)GvHV (PL_hintgv);
1197 svf [7] = PL_diehook;
1198 svf [8] = PL_warnhook;
1199 assert (9 == sizeof (svf) / sizeof (*svf));
1200
1201 SvRV_set (coro_current, old_current);
1202
1203 load_perl (aTHX_ current);
1204 }
1205
1206 {
1207 unsigned int i;
1208
1209 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1210 SvREFCNT_dec (svf [i]);
1211
1212 SvREFCNT_dec (coro->saved_deffh);
1213 SvREFCNT_dec (coro->rouse_cb);
1214 SvREFCNT_dec (coro->invoke_cb);
1215 SvREFCNT_dec (coro->invoke_av);
1216 }
1217}
1218
1219ECB_INLINE void
1220free_coro_mortal (pTHX)
1221{
1222 if (ecb_expect_true (coro_mortal))
1223 {
1224 SvREFCNT_dec ((SV *)coro_mortal);
1225 coro_mortal = 0;
1226 }
1227}
1228
1229static int
1230runops_trace (pTHX)
1231{
1232 COP *oldcop = 0;
1233 int oldcxix = -2;
1234
1235 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1236 {
1237 PERL_ASYNC_CHECK ();
1238
1239 if (cctx_current->flags & CC_TRACE_ALL)
1240 {
1241 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1242 {
1243 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1244 SV **bot, **top;
1245 AV *av = newAV (); /* return values */
1246 SV **cb;
1247 dSP;
1248
1249 GV *gv = CvGV (cx->blk_sub.cv);
1250 SV *fullname = sv_2mortal (newSV (0));
1251 if (isGV (gv))
1252 gv_efullname3 (fullname, gv, 0);
1253
1254 bot = PL_stack_base + cx->blk_oldsp + 1;
1255 top = cx->blk_gimme == G_ARRAY ? SP + 1
1256 : cx->blk_gimme == G_SCALAR ? bot + 1
1257 : bot;
1258
1259 av_extend (av, top - bot);
1260 while (bot < top)
1261 av_push (av, SvREFCNT_inc_NN (*bot++));
1262
1263 PL_runops = RUNOPS_DEFAULT;
1264 ENTER;
1265 SAVETMPS;
1266 EXTEND (SP, 3);
1267 PUSHMARK (SP);
1268 PUSHs (&PL_sv_no);
1269 PUSHs (fullname);
1270 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1271 PUTBACK;
1272 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1273 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1274 SPAGAIN;
1275 FREETMPS;
1276 LEAVE;
1277 PL_runops = runops_trace;
1278 }
1279
1280 if (oldcop != PL_curcop)
1281 {
1282 oldcop = PL_curcop;
1283
1284 if (PL_curcop != &PL_compiling)
1285 {
1286 SV **cb;
1287
1288 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1289 {
1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1291
1292 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1293 {
1294 dSP;
1295 GV *gv = CvGV (cx->blk_sub.cv);
1296 SV *fullname = sv_2mortal (newSV (0));
1297
1298 if (isGV (gv))
1299 gv_efullname3 (fullname, gv, 0);
1300
1301 PL_runops = RUNOPS_DEFAULT;
1302 ENTER;
1303 SAVETMPS;
1304 EXTEND (SP, 3);
1305 PUSHMARK (SP);
1306 PUSHs (&PL_sv_yes);
1307 PUSHs (fullname);
1308 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1309 PUTBACK;
1310 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1311 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1312 SPAGAIN;
1313 FREETMPS;
1314 LEAVE;
1315 PL_runops = runops_trace;
1316 }
1317
1318 oldcxix = cxstack_ix;
1319 }
1320
1321 if (cctx_current->flags & CC_TRACE_LINE)
1322 {
1323 dSP;
1324
1325 PL_runops = RUNOPS_DEFAULT;
1326 ENTER;
1327 SAVETMPS;
1328 EXTEND (SP, 3);
1329 PL_runops = RUNOPS_DEFAULT;
1330 PUSHMARK (SP);
1331 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1332 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1333 PUTBACK;
1334 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1335 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1336 SPAGAIN;
1337 FREETMPS;
1338 LEAVE;
1339 PL_runops = runops_trace;
1340 }
1341 }
1342 }
1343 }
1344 }
1345
1346 TAINT_NOT;
1347 return 0;
1348}
1349
1350static struct CoroSLF cctx_ssl_frame;
1351
1352static void
1353slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1354{
1355 ta->prev = 0;
1356}
1357
1358static int
1359slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1360{
1361 *frame = cctx_ssl_frame;
1362
1363 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1364}
1365
1366/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1367static void ecb_noinline
1368cctx_prepare (pTHX)
1369{
1370 PL_top_env = &PL_start_env;
1371
1372 if (cctx_current->flags & CC_TRACE)
1373 PL_runops = runops_trace;
1374
1375 /* we already must be executing an SLF op, there is no other valid way
1376 * that can lead to creation of a new cctx */
1377 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1378 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1379
1380 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1381 cctx_ssl_frame = slf_frame;
1382
1383 slf_frame.prepare = slf_prepare_set_stacklevel;
1384 slf_frame.check = slf_check_set_stacklevel;
1385}
1386
1387/* the tail of transfer: execute stuff we can only do after a transfer */
1388ECB_INLINE void
1389transfer_tail (pTHX)
1390{
1391 free_coro_mortal (aTHX);
1392}
1393
1394/*
1395 * this is a _very_ stripped down perl interpreter ;)
1396 */
1397static void
1398cctx_run (void *arg)
1399{
1400#ifdef USE_ITHREADS
1401# if CORO_PTHREAD
1402 PERL_SET_CONTEXT (coro_thx);
1403# endif
1404#endif
1405 {
1406 dTHX;
1407
1408 /* normally we would need to skip the entersub here */
1409 /* not doing so will re-execute it, which is exactly what we want */
1410 /* PL_nop = PL_nop->op_next */
1411
1412 /* inject a fake subroutine call to cctx_init */
1413 cctx_prepare (aTHX);
1414
1415 /* cctx_run is the alternative tail of transfer() */
1416 transfer_tail (aTHX);
1417
1418 /* somebody or something will hit me for both perl_run and PL_restartop */
1419 PL_restartop = PL_op;
1420 perl_run (PL_curinterp);
1421 /*
1422 * Unfortunately, there is no way to get at the return values of the
1423 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1424 * runtime errors here, as this is just a random interpreter, not a thread.
1425 */
1426
1427 /*
1428 * If perl-run returns we assume exit() was being called or the coro
1429 * fell off the end, which seems to be the only valid (non-bug)
1430 * reason for perl_run to return. We try to exit by jumping to the
1431 * bootstrap-time "top" top_env, as we cannot restore the "main"
1432 * coroutine as Coro has no such concept.
1433 * This actually isn't valid with the pthread backend, but OSes requiring
1434 * that backend are too broken to do it in a standards-compliant way.
1435 */
1436 PL_top_env = main_top_env;
1437 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1438 }
1439}
1440
1441static coro_cctx *
1442cctx_new ()
1443{
1444 coro_cctx *cctx;
1445
1446 ++cctx_count;
1447 New (0, cctx, 1, coro_cctx);
1448
1449 cctx->gen = cctx_gen;
1450 cctx->flags = 0;
1451 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1452
1453 return cctx;
1454}
1455
1456/* create a new cctx only suitable as source */
1457static coro_cctx *
1458cctx_new_empty ()
1459{
1460 coro_cctx *cctx = cctx_new ();
1461
1462 cctx->sptr = 0;
1463 coro_create (&cctx->cctx, 0, 0, 0, 0);
1464
1465 return cctx;
1466}
1467
1468/* create a new cctx suitable as destination/running a perl interpreter */
1469static coro_cctx *
1470cctx_new_run ()
1471{
1472 coro_cctx *cctx = cctx_new ();
1473 void *stack_start;
1474 size_t stack_size;
1475
1476#if HAVE_MMAP
1477 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1478 /* mmap supposedly does allocate-on-write for us */
1479 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1480
1481 if (cctx->sptr != (void *)-1)
1482 {
1483 #if CORO_STACKGUARD
1484 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1485 #endif
1486 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1487 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1488 cctx->flags |= CC_MAPPED;
1489 }
1490 else
1491#endif
1492 {
1493 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1494 New (0, cctx->sptr, cctx_stacksize, long);
1495
1496 if (!cctx->sptr)
1497 {
1498 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1499 _exit (EXIT_FAILURE);
1500 }
1501
1502 stack_start = cctx->sptr;
1503 stack_size = cctx->ssize;
1504 }
1505
1506 #if CORO_USE_VALGRIND
1507 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1508 #endif
1509
1510 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1511
1512 return cctx;
1513}
1514
1515static void
1516cctx_destroy (coro_cctx *cctx)
1517{
1518 if (!cctx)
1519 return;
1520
1521 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1522
1523 --cctx_count;
1524 coro_destroy (&cctx->cctx);
1525
1526 /* coro_transfer creates new, empty cctx's */
1527 if (cctx->sptr)
1528 {
1529 #if CORO_USE_VALGRIND
1530 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1531 #endif
1532
1533#if HAVE_MMAP
1534 if (cctx->flags & CC_MAPPED)
1535 munmap (cctx->sptr, cctx->ssize);
1536 else
1537#endif
1538 Safefree (cctx->sptr);
1539 }
1540
1541 Safefree (cctx);
1542}
1543
1544/* wether this cctx should be destructed */
1545#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1546
1547static coro_cctx *
1548cctx_get (pTHX)
1549{
1550 while (ecb_expect_true (cctx_first))
1551 {
1552 coro_cctx *cctx = cctx_first;
1553 cctx_first = cctx->next;
1554 --cctx_idle;
1555
1556 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1557 return cctx;
1558
1559 cctx_destroy (cctx);
1560 }
1561
1562 return cctx_new_run ();
1563}
1564
1565static void
1566cctx_put (coro_cctx *cctx)
1567{
1568 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1569
1570 /* free another cctx if overlimit */
1571 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1572 {
1573 coro_cctx *first = cctx_first;
1574 cctx_first = first->next;
1575 --cctx_idle;
1576
1577 cctx_destroy (first);
1578 }
1579
1580 ++cctx_idle;
1581 cctx->next = cctx_first;
1582 cctx_first = cctx;
1583}
1584
1585/** coroutine switching *****************************************************/
1586
1587static void
1588transfer_check (pTHX_ struct coro *prev, struct coro *next)
1589{
1590 /* TODO: throwing up here is considered harmful */
1591
1592 if (ecb_expect_true (prev != next))
1593 {
1594 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1595 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1596
1597 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1598 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1599
1600#if !PERL_VERSION_ATLEAST (5,10,0)
1601 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1602 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1603#endif
1604 }
1605}
1606
1607/* always use the TRANSFER macro */
1608static void ecb_noinline /* noinline so we have a fixed stackframe */
1609transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1610{
1611 dSTACKLEVEL;
1612
1613 /* sometimes transfer is only called to set idle_sp */
1614 if (ecb_expect_false (!prev))
1615 {
1616 cctx_current->idle_sp = STACKLEVEL;
1617 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1618 }
1619 else if (ecb_expect_true (prev != next))
1620 {
1621 coro_cctx *cctx_prev;
1622
1623 if (ecb_expect_false (prev->flags & CF_NEW))
1624 {
1625 /* create a new empty/source context */
1626 prev->flags &= ~CF_NEW;
1627 prev->flags |= CF_RUNNING;
1628 }
1629
1630 prev->flags &= ~CF_RUNNING;
1631 next->flags |= CF_RUNNING;
1632
1633 /* first get rid of the old state */
1634 save_perl (aTHX_ prev);
1635
1636 if (ecb_expect_false (next->flags & CF_NEW))
1637 {
1638 /* need to start coroutine */
1639 next->flags &= ~CF_NEW;
1640 /* setup coroutine call */
1641 init_perl (aTHX_ next);
1642 }
1643 else
1644 load_perl (aTHX_ next);
1645
1646 /* possibly untie and reuse the cctx */
1647 if (ecb_expect_true (
1648 cctx_current->idle_sp == STACKLEVEL
1649 && !(cctx_current->flags & CC_TRACE)
1650 && !force_cctx
1651 ))
1652 {
1653 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1654 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1655
1656 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1657 /* without this the next cctx_get might destroy the running cctx while still in use */
1658 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1659 if (ecb_expect_true (!next->cctx))
1660 next->cctx = cctx_get (aTHX);
1661
1662 cctx_put (cctx_current);
1663 }
1664 else
1665 prev->cctx = cctx_current;
1666
1667 ++next->usecount;
1668
1669 cctx_prev = cctx_current;
1670 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1671
1672 next->cctx = 0;
1673
1674 if (ecb_expect_false (cctx_prev != cctx_current))
1675 {
1676 cctx_prev->top_env = PL_top_env;
1677 PL_top_env = cctx_current->top_env;
1678 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1679 }
1680
1681 transfer_tail (aTHX);
1682 }
1683}
1684
1685#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1686#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1687
1688/** high level stuff ********************************************************/
1689
1690/* this function is actually Coro, not Coro::State, but we call it from here */
1691/* because it is convenient - but it hasn't been declared yet for that reason */
1692static void
1693coro_call_on_destroy (pTHX_ struct coro *coro);
1694
1695static void
1696coro_state_destroy (pTHX_ struct coro *coro)
1697{
1698 if (coro->flags & CF_ZOMBIE)
1699 return;
1700
1701 slf_destroy (aTHX_ coro);
1702
1703 coro->flags |= CF_ZOMBIE;
1704
1705 if (coro->flags & CF_READY)
1706 {
1707 /* reduce nready, as destroying a ready coro effectively unreadies it */
1708 /* alternative: look through all ready queues and remove the coro */
1709 --coro_nready;
1710 }
1711 else
1712 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1713
1714 if (coro->next) coro->next->prev = coro->prev;
1715 if (coro->prev) coro->prev->next = coro->next;
1716 if (coro == coro_first) coro_first = coro->next;
1717
1718 if (coro->mainstack
1719 && coro->mainstack != main_mainstack
1720 && coro->slot
1721 && !PL_dirty)
1722 destroy_perl (aTHX_ coro);
1723
1724 cctx_destroy (coro->cctx);
1725 SvREFCNT_dec (coro->startcv);
1726 SvREFCNT_dec (coro->args);
1727 SvREFCNT_dec (coro->swap_sv);
1728 SvREFCNT_dec (CORO_THROW);
1729
1730 coro_call_on_destroy (aTHX_ coro);
1731
1732 /* more destruction mayhem in coro_state_free */
1733}
1734
1735static int
1736coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1737{
1738 struct coro *coro = (struct coro *)mg->mg_ptr;
1739 mg->mg_ptr = 0;
1740
1741 coro_state_destroy (aTHX_ coro);
1742 SvREFCNT_dec (coro->on_destroy);
1743 SvREFCNT_dec (coro->status);
1744
1745 Safefree (coro);
1746
1747 return 0;
1748}
1749
1750static int ecb_cold
1751coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1752{
1753 /* called when perl clones the current process the slow way (windows process emulation) */
1754 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1755 mg->mg_ptr = 0;
1756 mg->mg_virtual = 0;
1757
1758 return 0;
1759}
1760
1761static MGVTBL coro_state_vtbl = {
1762 0, 0, 0, 0,
1763 coro_state_free,
1764 0,
1765#ifdef MGf_DUP
1766 coro_state_dup,
1767#else
1768# define MGf_DUP 0
1769#endif
1770};
1771
1772static void
1773prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1774{
1775 ta->prev = SvSTATE (prev_sv);
1776 ta->next = SvSTATE (next_sv);
1777 TRANSFER_CHECK (*ta);
1778}
1779
1780static void
1781api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1782{
1783 struct coro_transfer_args ta;
1784
1785 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1786 TRANSFER (ta, 1);
1787}
1788
1789/** Coro ********************************************************************/
1790
1791ECB_INLINE void
1792coro_enq (pTHX_ struct coro *coro)
1793{
1794 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1795
1796 SvREFCNT_inc_NN (coro->hv);
1797
1798 coro->next_ready = 0;
1799 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1800 ready [1] = coro;
1801}
1802
1803ECB_INLINE struct coro *
1804coro_deq (pTHX)
1805{
1806 int prio;
1807
1808 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1809 {
1810 struct coro **ready = coro_ready [prio];
1811
1812 if (ready [0])
1813 {
1814 struct coro *coro = ready [0];
1815 ready [0] = coro->next_ready;
1816 return coro;
1817 }
1818 }
1819
1820 return 0;
1821}
1822
1823static void
1824invoke_sv_ready_hook_helper (void)
1825{
635 dTHX; 1826 dTHX;
636 dSP; 1827 dSP;
637 Coro__State ctx = (Coro__State)arg;
638 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639 1828
640 coro_init_stacks (aTHX); 1829 ENTER;
641 /*PL_curcop = 0;*/ 1830 SAVETMPS;
642 /*PL_in_eval = PL_in_eval;*/ /* inherit */
643 SvREFCNT_dec (GvAV (PL_defgv));
644 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
645 1831
646 SPAGAIN;
647
648 if (ctx->stack)
649 {
650 ctx->cursp = 0;
651
652 PUSHMARK(SP); 1832 PUSHMARK (SP);
653 PUTBACK; 1833 PUTBACK;
654 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1834 call_sv (coro_readyhook, G_VOID | G_DISCARD);
655 1835
656 if (SvTRUE (ERRSV)) 1836 FREETMPS;
657 croak (NULL); 1837 LEAVE;
658 else 1838}
659 croak ("FATAL: CCTXT coroutine returned!"); 1839
1840static int
1841api_ready (pTHX_ SV *coro_sv)
1842{
1843 struct coro *coro = SvSTATE (coro_sv);
1844
1845 if (coro->flags & CF_READY)
1846 return 0;
1847
1848 coro->flags |= CF_READY;
1849
1850 coro_enq (aTHX_ coro);
1851
1852 if (!coro_nready++)
1853 if (coroapi.readyhook)
1854 coroapi.readyhook ();
1855
1856 return 1;
1857}
1858
1859static int
1860api_is_ready (pTHX_ SV *coro_sv)
1861{
1862 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1863}
1864
1865/* expects to own a reference to next->hv */
1866ECB_INLINE void
1867prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1868{
1869 SV *prev_sv = SvRV (coro_current);
1870
1871 ta->prev = SvSTATE_hv (prev_sv);
1872 ta->next = next;
1873
1874 TRANSFER_CHECK (*ta);
1875
1876 SvRV_set (coro_current, (SV *)next->hv);
1877
1878 free_coro_mortal (aTHX);
1879 coro_mortal = prev_sv;
1880}
1881
1882static void
1883prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1884{
1885 for (;;)
660 } 1886 {
661 else 1887 struct coro *next = coro_deq (aTHX);
662 {
663 UNOP myop;
664 1888
665 PL_op = (OP *)&myop; 1889 if (ecb_expect_true (next))
666
667 Zero(&myop, 1, UNOP);
668 myop.op_next = Nullop;
669 myop.op_flags = OPf_WANT_VOID;
670
671 PUSHMARK(SP);
672 XPUSHs (sub_init);
673 /*
674 * the next line is slightly wrong, as PL_op->op_next
675 * is actually being executed so we skip the first op.
676 * that doesn't matter, though, since it is only
677 * pp_nextstate and we never return...
678 * ah yes, and I don't care anyways ;)
679 */
680 PUTBACK;
681 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682 SPAGAIN;
683
684 ENTER; /* necessary e.g. for dounwind */
685 }
686}
687
688static void
689continue_coro (void *arg)
690{
691 /*
692 * this is a _very_ stripped down perl interpreter ;)
693 */
694 dTHX;
695 Coro__State ctx = (Coro__State)arg;
696 JMPENV coro_start_env;
697
698 PL_top_env = &ctx->start_env;
699
700 ctx->cursp = 0;
701 PL_op = PL_op->op_next;
702 CALLRUNOPS(aTHX);
703
704 abort ();
705}
706
707STATIC void
708transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
709{
710 dSTACKLEVEL;
711
712 if (prev != next)
713 {
714 if (next->mainstack)
715 { 1890 {
716 LOCK; 1891 /* cannot transfer to destroyed coros, skip and look for next */
717 SAVE (prev, flags); 1892 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
718 LOAD (next); 1893 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
719 UNLOCK; 1894 else
720
721 /* mark this state as in-use */
722 next->mainstack = 0;
723 next->tmps_ix = -2;
724
725 /* stacklevel changed? if yes, grab the stack for us! */
726 if (flags & TRANSFER_SAVE_CCTXT)
727 { 1895 {
728 if (!prev->stack) 1896 next->flags &= ~CF_READY;
729 allocate_stack (prev, 0); 1897 --coro_nready;
730 else if (prev->cursp != stacklevel 1898
731 && prev->stack->usecnt > 1) 1899 prepare_schedule_to (aTHX_ ta, next);
732 { 1900 break;
733 prev->gencnt = ++prev->stack->gencnt;
734 prev->stack->usecnt = 1;
735 }
736
737 /* has our stack been invalidated? */
738 if (next->stack && next->stack->gencnt != next->gencnt)
739 {
740 deallocate_stack (next);
741 allocate_stack (next, 1);
742 coro_create (&(next->stack->cctx),
743 continue_coro, (void *)next,
744 next->stack->sptr, labs (next->stack->ssize));
745 }
746
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 prev->cursp = stacklevel;
749 /* don't add any code here */
750 } 1901 }
751 else
752 next->cursp = stacklevel;
753 } 1902 }
754 else if (next->tmps_ix == -2)
755 croak ("tried to transfer to running coroutine");
756 else 1903 else
757 { 1904 {
758 LOCK; 1905 /* nothing to schedule: call the idle handler */
759 SAVE (prev, -1); /* first get rid of the old state */ 1906 if (SvROK (sv_idle)
760 UNLOCK; 1907 && SvOBJECT (SvRV (sv_idle)))
761
762 if (flags & TRANSFER_SAVE_CCTXT)
763 { 1908 {
764 if (!prev->stack) 1909 if (SvRV (sv_idle) == SvRV (coro_current))
765 allocate_stack (prev, 0); 1910 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
766 1911
767 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1912 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
768 { 1913 api_ready (aTHX_ SvRV (sv_idle));
769 PL_top_env = &next->start_env; 1914 --coro_nready;
770
771 setup_coro (next);
772 next->cursp = stacklevel;
773
774 prev->stack->refcnt++;
775 prev->stack->usecnt++;
776 next->stack = prev->stack;
777 next->gencnt = prev->gencnt;
778 }
779 else
780 {
781 assert (!next->stack);
782 allocate_stack (next, 1);
783 coro_create (&(next->stack->cctx),
784 setup_coro, (void *)next,
785 next->stack->sptr, labs (next->stack->ssize));
786 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787 prev->cursp = stacklevel;
788 /* don't add any code here */
789 }
790 } 1915 }
791 else 1916 else
792 { 1917 {
793 setup_coro (next); 1918 /* TODO: deprecated, remove, cannot work reliably *//*D*/
794 next->cursp = stacklevel; 1919 dSP;
1920
1921 ENTER;
1922 SAVETMPS;
1923
1924 PUSHMARK (SP);
1925 PUTBACK;
1926 call_sv (sv_idle, G_VOID | G_DISCARD);
1927
1928 FREETMPS;
1929 LEAVE;
795 } 1930 }
796 } 1931 }
797 } 1932 }
1933}
798 1934
799 LOCK; 1935ECB_INLINE void
1936prepare_cede (pTHX_ struct coro_transfer_args *ta)
1937{
1938 api_ready (aTHX_ coro_current);
1939 prepare_schedule (aTHX_ ta);
1940}
1941
1942ECB_INLINE void
1943prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1944{
1945 SV *prev = SvRV (coro_current);
1946
800 if (coro_mortal) 1947 if (coro_nready)
801 {
802 SvREFCNT_dec (coro_mortal);
803 coro_mortal = 0;
804 } 1948 {
805 UNLOCK; 1949 prepare_schedule (aTHX_ ta);
806} 1950 api_ready (aTHX_ prev);
807
808#define SV_CORO(sv,func) \
809 do { \
810 if (SvROK (sv)) \
811 sv = SvRV (sv); \
812 \
813 if (SvTYPE (sv) == SVt_PVHV) \
814 { \
815 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816 \
817 if (!he) \
818 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819 \
820 (sv) = SvRV (HeVAL(he)); \
821 } \
822 \
823 /* must also be changed inside Coro::Cont::yield */ \
824 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826 \
827 } while(0)
828
829#define SvSTATE(sv) (struct coro *)SvIV (sv)
830
831static void
832api_transfer(pTHX_ SV *prev, SV *next, int flags)
833{
834 SV_CORO (prev, "Coro::transfer");
835 SV_CORO (next, "Coro::transfer");
836
837 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
838}
839
840/** Coro ********************************************************************/
841
842#define PRIO_MAX 3
843#define PRIO_HIGH 1
844#define PRIO_NORMAL 0
845#define PRIO_LOW -1
846#define PRIO_IDLE -3
847#define PRIO_MIN -4
848
849/* for Coro.pm */
850static GV *coro_current, *coro_idle;
851static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
852static int coro_nready;
853
854static void
855coro_enq (pTHX_ SV *sv)
856{
857 if (SvTYPE (sv) == SVt_PVHV)
858 { 1951 }
859 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1952 else
860 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1953 prepare_nop (aTHX_ ta);
1954}
861 1955
862 prio = prio > PRIO_MAX ? PRIO_MAX 1956static void
863 : prio < PRIO_MIN ? PRIO_MIN 1957api_schedule (pTHX)
864 : prio; 1958{
1959 struct coro_transfer_args ta;
865 1960
866 av_push (coro_ready [prio - PRIO_MIN], sv); 1961 prepare_schedule (aTHX_ &ta);
867 coro_nready++; 1962 TRANSFER (ta, 1);
1963}
868 1964
1965static void
1966api_schedule_to (pTHX_ SV *coro_sv)
1967{
1968 struct coro_transfer_args ta;
1969 struct coro *next = SvSTATE (coro_sv);
1970
1971 SvREFCNT_inc_NN (coro_sv);
1972 prepare_schedule_to (aTHX_ &ta, next);
1973}
1974
1975static int
1976api_cede (pTHX)
1977{
1978 struct coro_transfer_args ta;
1979
1980 prepare_cede (aTHX_ &ta);
1981
1982 if (ecb_expect_true (ta.prev != ta.next))
1983 {
1984 TRANSFER (ta, 1);
869 return; 1985 return 1;
1986 }
1987 else
1988 return 0;
1989}
1990
1991static int
1992api_cede_notself (pTHX)
1993{
1994 if (coro_nready)
1995 {
1996 struct coro_transfer_args ta;
1997
1998 prepare_cede_notself (aTHX_ &ta);
1999 TRANSFER (ta, 1);
2000 return 1;
2001 }
2002 else
2003 return 0;
2004}
2005
2006static void
2007api_trace (pTHX_ SV *coro_sv, int flags)
2008{
2009 struct coro *coro = SvSTATE (coro_sv);
2010
2011 if (coro->flags & CF_RUNNING)
2012 croak ("cannot enable tracing on a running coroutine, caught");
2013
2014 if (flags & CC_TRACE)
2015 {
2016 if (!coro->cctx)
2017 coro->cctx = cctx_new_run ();
2018 else if (!(coro->cctx->flags & CC_TRACE))
2019 croak ("cannot enable tracing on coroutine with custom stack, caught");
2020
2021 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2022 }
2023 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2024 {
2025 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2026
2027 if (coro->flags & CF_RUNNING)
2028 PL_runops = RUNOPS_DEFAULT;
2029 else
2030 coro->slot->runops = RUNOPS_DEFAULT;
2031 }
2032}
2033
2034static void
2035coro_push_av (pTHX_ AV *av, I32 gimme_v)
2036{
2037 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2038 {
2039 dSP;
2040
2041 if (gimme_v == G_SCALAR)
2042 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2043 else
2044 {
2045 int i;
2046 EXTEND (SP, AvFILLp (av) + 1);
2047
2048 for (i = 0; i <= AvFILLp (av); ++i)
2049 PUSHs (AvARRAY (av)[i]);
2050 }
2051
2052 PUTBACK;
2053 }
2054}
2055
2056static void
2057coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2058{
2059 if (!coro->on_destroy)
2060 coro->on_destroy = newAV ();
2061
2062 av_push (coro->on_destroy, cb);
2063}
2064
2065static void
2066slf_destroy_join (pTHX_ struct CoroSLF *frame)
2067{
2068 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2069}
2070
2071static int
2072slf_check_join (pTHX_ struct CoroSLF *frame)
2073{
2074 struct coro *coro = (struct coro *)frame->data;
2075
2076 if (!coro->status)
2077 return 1;
2078
2079 frame->destroy = 0;
2080
2081 coro_push_av (aTHX_ coro->status, GIMME_V);
2082
2083 SvREFCNT_dec ((SV *)coro->hv);
2084
2085 return 0;
2086}
2087
2088static void
2089slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2090{
2091 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2092
2093 if (items > 1)
2094 croak ("join called with too many arguments");
2095
2096 if (coro->status)
2097 frame->prepare = prepare_nop;
2098 else
2099 {
2100 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2101 frame->prepare = prepare_schedule;
2102 }
2103
2104 frame->check = slf_check_join;
2105 frame->destroy = slf_destroy_join;
2106 frame->data = (void *)coro;
2107 SvREFCNT_inc (coro->hv);
2108}
2109
2110static void
2111coro_call_on_destroy (pTHX_ struct coro *coro)
2112{
2113 AV *od = coro->on_destroy;
2114
2115 if (!od)
2116 return;
2117
2118 while (AvFILLp (od) >= 0)
2119 {
2120 SV *cb = sv_2mortal (av_pop (od));
2121
2122 /* coro hv's (and only hv's at the moment) are supported as well */
2123 if (SvSTATEhv_p (aTHX_ cb))
2124 api_ready (aTHX_ cb);
2125 else
2126 {
2127 dSP; /* don't disturb outer sp */
2128 PUSHMARK (SP);
2129
2130 if (coro->status)
2131 {
2132 PUTBACK;
2133 coro_push_av (aTHX_ coro->status, G_ARRAY);
2134 SPAGAIN;
2135 }
2136
2137 PUTBACK;
2138 call_sv (cb, G_VOID | G_DISCARD);
2139 }
2140 }
2141}
2142
2143static void
2144coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2145{
2146 AV *av;
2147
2148 if (coro->status)
2149 {
2150 av = coro->status;
2151 av_clear (av);
2152 }
2153 else
2154 av = coro->status = newAV ();
2155
2156 /* items are actually not so common, so optimise for this case */
2157 if (items)
2158 {
2159 int i;
2160
2161 av_extend (av, items - 1);
2162
2163 for (i = 0; i < items; ++i)
2164 av_push (av, SvREFCNT_inc_NN (arg [i]));
2165 }
2166}
2167
2168static void
2169slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2170{
2171 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2172 api_ready (aTHX_ sv_manager);
2173
2174 frame->prepare = prepare_schedule;
2175 frame->check = slf_check_repeat;
2176
2177 /* as a minor optimisation, we could unwind all stacks here */
2178 /* but that puts extra pressure on pp_slf, and is not worth much */
2179 /*coro_unwind_stacks (aTHX);*/
2180}
2181
2182static void
2183slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 HV *coro_hv = (HV *)SvRV (coro_current);
2186
2187 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2188 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2189}
2190
2191static void
2192slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2193{
2194 HV *coro_hv;
2195 struct coro *coro;
2196
2197 if (items <= 0)
2198 croak ("Coro::cancel called without coro object,");
2199
2200 coro = SvSTATE (arg [0]);
2201 coro_hv = coro->hv;
2202
2203 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2204
2205 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2206 {
2207 /* coro currently busy cancelling something, so just notify it */
2208 coro->slf_frame.data = (void *)coro;
2209
2210 frame->prepare = prepare_nop;
2211 frame->check = slf_check_nop;
2212 }
2213 else if (coro_hv == (HV *)SvRV (coro_current))
2214 {
2215 /* cancelling the current coro is allowed, and equals terminate */
2216 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2217 }
2218 else
2219 {
2220 struct coro *self = SvSTATE_current;
2221
2222 /* otherwise we cancel directly, purely for speed reasons
2223 * unfortunately, this requires some magic trickery, as
2224 * somebody else could cancel us, so we have to fight the cancellation.
2225 * this is ugly, and hopefully fully worth the extra speed.
2226 * besides, I can't get the slow-but-safe version working...
2227 */
2228 slf_frame.data = 0;
2229 self->flags |= CF_NOCANCEL;
2230 coro_state_destroy (aTHX_ coro);
2231 self->flags &= ~CF_NOCANCEL;
2232
2233 if (slf_frame.data)
2234 {
2235 /* while we were busy we have been cancelled, so terminate */
2236 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2237 }
2238 else
2239 {
2240 frame->prepare = prepare_nop;
2241 frame->check = slf_check_nop;
2242 }
2243 }
2244}
2245
2246static int
2247slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2248{
2249 frame->prepare = 0;
2250 coro_unwind_stacks (aTHX);
2251
2252 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2253
2254 return 1;
2255}
2256
2257static int
2258safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2259{
2260 if (coro->cctx)
2261 croak ("coro inside C callback, unable to cancel at this time, caught");
2262
2263 if (coro->flags & CF_NEW)
2264 {
2265 coro_set_status (aTHX_ coro, arg, items);
2266 coro_state_destroy (aTHX_ coro);
2267 }
2268 else
2269 {
2270 if (!coro->slf_frame.prepare)
2271 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2272
2273 slf_destroy (aTHX_ coro);
2274
2275 coro_set_status (aTHX_ coro, arg, items);
2276 coro->slf_frame.prepare = prepare_nop;
2277 coro->slf_frame.check = slf_check_safe_cancel;
2278
2279 api_ready (aTHX_ (SV *)coro->hv);
2280 }
2281
2282 return 1;
2283}
2284
2285/*****************************************************************************/
2286/* async pool handler */
2287
2288static int
2289slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2290{
2291 HV *hv = (HV *)SvRV (coro_current);
2292 struct coro *coro = (struct coro *)frame->data;
2293
2294 if (!coro->invoke_cb)
2295 return 1; /* loop till we have invoke */
2296 else
2297 {
2298 hv_store (hv, "desc", sizeof ("desc") - 1,
2299 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2300
2301 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2302
2303 {
2304 dSP;
2305 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2306 PUTBACK;
870 } 2307 }
871 2308
872 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2309 SvREFCNT_dec (GvAV (PL_defgv));
2310 GvAV (PL_defgv) = coro->invoke_av;
2311 coro->invoke_av = 0;
2312
2313 return 0;
2314 }
2315}
2316
2317static void
2318slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2319{
2320 HV *hv = (HV *)SvRV (coro_current);
2321 struct coro *coro = SvSTATE_hv ((SV *)hv);
2322
2323 if (ecb_expect_true (coro->saved_deffh))
2324 {
2325 /* subsequent iteration */
2326 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2327 coro->saved_deffh = 0;
2328
2329 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2330 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2331 {
2332 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2333 return;
2334 }
2335 else
2336 {
2337 av_clear (GvAV (PL_defgv));
2338 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2339
2340 coro->prio = 0;
2341
2342 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2343 api_trace (aTHX_ coro_current, 0);
2344
2345 frame->prepare = prepare_schedule;
2346 av_push (av_async_pool, SvREFCNT_inc (hv));
2347 }
2348 }
2349 else
2350 {
2351 /* first iteration, simply fall through */
2352 frame->prepare = prepare_nop;
2353 }
2354
2355 frame->check = slf_check_pool_handler;
2356 frame->data = (void *)coro;
2357}
2358
2359/*****************************************************************************/
2360/* rouse callback */
2361
2362#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2363
2364static void
2365coro_rouse_callback (pTHX_ CV *cv)
2366{
2367 dXSARGS;
2368 SV *data = (SV *)S_GENSUB_ARG;
2369
2370 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2371 {
2372 /* first call, set args */
2373 SV *coro = SvRV (data);
2374 AV *av = newAV ();
2375
2376 SvRV_set (data, (SV *)av);
2377
2378 /* better take a full copy of the arguments */
2379 while (items--)
2380 av_store (av, items, newSVsv (ST (items)));
2381
2382 api_ready (aTHX_ coro);
2383 SvREFCNT_dec (coro);
2384 }
2385
2386 XSRETURN_EMPTY;
2387}
2388
2389static int
2390slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2391{
2392 SV *data = (SV *)frame->data;
2393
2394 if (CORO_THROW)
2395 return 0;
2396
2397 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2398 return 1;
2399
2400 /* now push all results on the stack */
2401 {
2402 dSP;
2403 AV *av = (AV *)SvRV (data);
2404 int i;
2405
2406 EXTEND (SP, AvFILLp (av) + 1);
2407 for (i = 0; i <= AvFILLp (av); ++i)
2408 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2409
2410 /* we have stolen the elements, so set length to zero and free */
2411 AvFILLp (av) = -1;
2412 av_undef (av);
2413
2414 PUTBACK;
2415 }
2416
2417 return 0;
2418}
2419
2420static void
2421slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2422{
2423 SV *cb;
2424
2425 if (items)
2426 cb = arg [0];
2427 else
2428 {
2429 struct coro *coro = SvSTATE_current;
2430
2431 if (!coro->rouse_cb)
2432 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2433
2434 cb = sv_2mortal (coro->rouse_cb);
2435 coro->rouse_cb = 0;
2436 }
2437
2438 if (!SvROK (cb)
2439 || SvTYPE (SvRV (cb)) != SVt_PVCV
2440 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2441 croak ("Coro::rouse_wait called with illegal callback argument,");
2442
2443 {
2444 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2445 SV *data = (SV *)S_GENSUB_ARG;
2446
2447 frame->data = (void *)data;
2448 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2449 frame->check = slf_check_rouse_wait;
2450 }
873} 2451}
874 2452
875static SV * 2453static SV *
876coro_deq (pTHX_ int min_prio) 2454coro_new_rouse_cb (pTHX)
877{ 2455{
878 int prio = PRIO_MAX - PRIO_MIN; 2456 HV *hv = (HV *)SvRV (coro_current);
2457 struct coro *coro = SvSTATE_hv (hv);
2458 SV *data = newRV_inc ((SV *)hv);
2459 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
879 2460
880 min_prio -= PRIO_MIN; 2461 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
881 if (min_prio < 0) 2462 SvREFCNT_dec (data); /* magicext increases the refcount */
882 min_prio = 0;
883 2463
884 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2464 SvREFCNT_dec (coro->rouse_cb);
885 if (av_len (coro_ready[prio]) >= 0) 2465 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2466
2467 return cb;
2468}
2469
2470/*****************************************************************************/
2471/* schedule-like-function opcode (SLF) */
2472
2473static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2474static const CV *slf_cv;
2475static SV **slf_argv;
2476static int slf_argc, slf_arga; /* count, allocated */
2477static I32 slf_ax; /* top of stack, for restore */
2478
2479/* this restores the stack in the case we patched the entersub, to */
2480/* recreate the stack frame as perl will on following calls */
2481/* since entersub cleared the stack */
2482static OP *
2483pp_restore (pTHX)
2484{
2485 int i;
2486 SV **SP = PL_stack_base + slf_ax;
2487
2488 PUSHMARK (SP);
2489
2490 EXTEND (SP, slf_argc + 1);
2491
2492 for (i = 0; i < slf_argc; ++i)
2493 PUSHs (sv_2mortal (slf_argv [i]));
2494
2495 PUSHs ((SV *)CvGV (slf_cv));
2496
2497 RETURNOP (slf_restore.op_first);
2498}
2499
2500static void
2501slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2502{
2503 SV **arg = (SV **)slf_frame.data;
2504
2505 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2506}
2507
2508static void
2509slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2510{
2511 if (items != 2)
2512 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2513
2514 frame->prepare = slf_prepare_transfer;
2515 frame->check = slf_check_nop;
2516 frame->data = (void *)arg; /* let's hope it will stay valid */
2517}
2518
2519static void
2520slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2521{
2522 frame->prepare = prepare_schedule;
2523 frame->check = slf_check_nop;
2524}
2525
2526static void
2527slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2528{
2529 struct coro *next = (struct coro *)slf_frame.data;
2530
2531 SvREFCNT_inc_NN (next->hv);
2532 prepare_schedule_to (aTHX_ ta, next);
2533}
2534
2535static void
2536slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 if (!items)
2539 croak ("Coro::schedule_to expects a coroutine argument, caught");
2540
2541 frame->data = (void *)SvSTATE (arg [0]);
2542 frame->prepare = slf_prepare_schedule_to;
2543 frame->check = slf_check_nop;
2544}
2545
2546static void
2547slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2548{
2549 api_ready (aTHX_ SvRV (coro_current));
2550
2551 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2552}
2553
2554static void
2555slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2556{
2557 frame->prepare = prepare_cede;
2558 frame->check = slf_check_nop;
2559}
2560
2561static void
2562slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2563{
2564 frame->prepare = prepare_cede_notself;
2565 frame->check = slf_check_nop;
2566}
2567
2568/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2569static void
2570slf_destroy (pTHX_ struct coro *coro)
2571{
2572 /* this callback is reserved for slf functions needing to do cleanup */
2573 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2574 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2575
2576 /*
2577 * The on_destroy above most likely is from an SLF call.
2578 * Since by definition the SLF call will not finish when we destroy
2579 * the coro, we will have to force-finish it here, otherwise
2580 * cleanup functions cannot call SLF functions.
2581 */
2582 coro->slf_frame.prepare = 0;
2583}
2584
2585/*
2586 * these not obviously related functions are all rolled into one
2587 * function to increase chances that they all will call transfer with the same
2588 * stack offset
2589 * SLF stands for "schedule-like-function".
2590 */
2591static OP *
2592pp_slf (pTHX)
2593{
2594 I32 checkmark; /* mark SP to see how many elements check has pushed */
2595
2596 /* set up the slf frame, unless it has already been set-up */
2597 /* the latter happens when a new coro has been started */
2598 /* or when a new cctx was attached to an existing coroutine */
2599 if (ecb_expect_true (!slf_frame.prepare))
2600 {
2601 /* first iteration */
2602 dSP;
2603 SV **arg = PL_stack_base + TOPMARK + 1;
2604 int items = SP - arg; /* args without function object */
2605 SV *gv = *sp;
2606
2607 /* do a quick consistency check on the "function" object, and if it isn't */
2608 /* for us, divert to the real entersub */
2609 if (SvTYPE (gv) != SVt_PVGV
2610 || !GvCV (gv)
2611 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2612 return PL_ppaddr[OP_ENTERSUB](aTHX);
2613
2614 if (!(PL_op->op_flags & OPf_STACKED))
886 { 2615 {
887 coro_nready--; 2616 /* ampersand-form of call, use @_ instead of stack */
888 return av_shift (coro_ready[prio]); 2617 AV *av = GvAV (PL_defgv);
2618 arg = AvARRAY (av);
2619 items = AvFILLp (av) + 1;
889 } 2620 }
2621
2622 /* now call the init function, which needs to set up slf_frame */
2623 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2624 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2625
2626 /* pop args */
2627 SP = PL_stack_base + POPMARK;
2628
2629 PUTBACK;
2630 }
2631
2632 /* now that we have a slf_frame, interpret it! */
2633 /* we use a callback system not to make the code needlessly */
2634 /* complicated, but so we can run multiple perl coros from one cctx */
2635
2636 do
2637 {
2638 struct coro_transfer_args ta;
2639
2640 slf_frame.prepare (aTHX_ &ta);
2641 TRANSFER (ta, 0);
2642
2643 checkmark = PL_stack_sp - PL_stack_base;
2644 }
2645 while (slf_frame.check (aTHX_ &slf_frame));
2646
2647 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2648
2649 /* exception handling */
2650 if (ecb_expect_false (CORO_THROW))
2651 {
2652 SV *exception = sv_2mortal (CORO_THROW);
2653
2654 CORO_THROW = 0;
2655 sv_setsv (ERRSV, exception);
2656 croak (0);
2657 }
2658
2659 /* return value handling - mostly like entersub */
2660 /* make sure we put something on the stack in scalar context */
2661 if (GIMME_V == G_SCALAR
2662 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2663 {
2664 dSP;
2665 SV **bot = PL_stack_base + checkmark;
2666
2667 if (sp == bot) /* too few, push undef */
2668 bot [1] = &PL_sv_undef;
2669 else /* too many, take last one */
2670 bot [1] = *sp;
2671
2672 SP = bot + 1;
2673
2674 PUTBACK;
2675 }
2676
2677 return NORMAL;
2678}
2679
2680static void
2681api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2682{
2683 int i;
2684 SV **arg = PL_stack_base + ax;
2685 int items = PL_stack_sp - arg + 1;
2686
2687 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2688
2689 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2690 && PL_op->op_ppaddr != pp_slf)
2691 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2692
2693 CvFLAGS (cv) |= CVf_SLF;
2694 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2695 slf_cv = cv;
2696
2697 /* we patch the op, and then re-run the whole call */
2698 /* we have to put the same argument on the stack for this to work */
2699 /* and this will be done by pp_restore */
2700 slf_restore.op_next = (OP *)&slf_restore;
2701 slf_restore.op_type = OP_CUSTOM;
2702 slf_restore.op_ppaddr = pp_restore;
2703 slf_restore.op_first = PL_op;
2704
2705 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2706
2707 if (PL_op->op_flags & OPf_STACKED)
2708 {
2709 if (items > slf_arga)
2710 {
2711 slf_arga = items;
2712 Safefree (slf_argv);
2713 New (0, slf_argv, slf_arga, SV *);
2714 }
2715
2716 slf_argc = items;
2717
2718 for (i = 0; i < items; ++i)
2719 slf_argv [i] = SvREFCNT_inc (arg [i]);
2720 }
2721 else
2722 slf_argc = 0;
2723
2724 PL_op->op_ppaddr = pp_slf;
2725 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2726
2727 PL_op = (OP *)&slf_restore;
2728}
2729
2730/*****************************************************************************/
2731/* dynamic wind */
2732
2733static void
2734on_enterleave_call (pTHX_ SV *cb)
2735{
2736 dSP;
2737
2738 PUSHSTACK;
2739
2740 PUSHMARK (SP);
2741 PUTBACK;
2742 call_sv (cb, G_VOID | G_DISCARD);
2743 SPAGAIN;
2744
2745 POPSTACK;
2746}
2747
2748static SV *
2749coro_avp_pop_and_free (pTHX_ AV **avp)
2750{
2751 AV *av = *avp;
2752 SV *res = av_pop (av);
2753
2754 if (AvFILLp (av) < 0)
2755 {
2756 *avp = 0;
2757 SvREFCNT_dec (av);
2758 }
2759
2760 return res;
2761}
2762
2763static void
2764coro_pop_on_enter (pTHX_ void *coro)
2765{
2766 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2767 SvREFCNT_dec (cb);
2768}
2769
2770static void
2771coro_pop_on_leave (pTHX_ void *coro)
2772{
2773 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2774 on_enterleave_call (aTHX_ sv_2mortal (cb));
2775}
2776
2777/*****************************************************************************/
2778/* PerlIO::cede */
2779
2780typedef struct
2781{
2782 PerlIOBuf base;
2783 NV next, every;
2784} PerlIOCede;
2785
2786static IV ecb_cold
2787PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2788{
2789 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2790
2791 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2792 self->next = nvtime () + self->every;
2793
2794 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2795}
2796
2797static SV * ecb_cold
2798PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2799{
2800 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2801
2802 return newSVnv (self->every);
2803}
2804
2805static IV
2806PerlIOCede_flush (pTHX_ PerlIO *f)
2807{
2808 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2809 double now = nvtime ();
2810
2811 if (now >= self->next)
2812 {
2813 api_cede (aTHX);
2814 self->next = now + self->every;
2815 }
2816
2817 return PerlIOBuf_flush (aTHX_ f);
2818}
2819
2820static PerlIO_funcs PerlIO_cede =
2821{
2822 sizeof(PerlIO_funcs),
2823 "cede",
2824 sizeof(PerlIOCede),
2825 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2826 PerlIOCede_pushed,
2827 PerlIOBuf_popped,
2828 PerlIOBuf_open,
2829 PerlIOBase_binmode,
2830 PerlIOCede_getarg,
2831 PerlIOBase_fileno,
2832 PerlIOBuf_dup,
2833 PerlIOBuf_read,
2834 PerlIOBuf_unread,
2835 PerlIOBuf_write,
2836 PerlIOBuf_seek,
2837 PerlIOBuf_tell,
2838 PerlIOBuf_close,
2839 PerlIOCede_flush,
2840 PerlIOBuf_fill,
2841 PerlIOBase_eof,
2842 PerlIOBase_error,
2843 PerlIOBase_clearerr,
2844 PerlIOBase_setlinebuf,
2845 PerlIOBuf_get_base,
2846 PerlIOBuf_bufsiz,
2847 PerlIOBuf_get_ptr,
2848 PerlIOBuf_get_cnt,
2849 PerlIOBuf_set_ptrcnt,
2850};
2851
2852/*****************************************************************************/
2853/* Coro::Semaphore & Coro::Signal */
2854
2855static SV *
2856coro_waitarray_new (pTHX_ int count)
2857{
2858 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2859 AV *av = newAV ();
2860 SV **ary;
2861
2862 /* unfortunately, building manually saves memory */
2863 Newx (ary, 2, SV *);
2864 AvALLOC (av) = ary;
2865#if PERL_VERSION_ATLEAST (5,10,0)
2866 AvARRAY (av) = ary;
2867#else
2868 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2869 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2870 SvPVX ((SV *)av) = (char *)ary;
2871#endif
2872 AvMAX (av) = 1;
2873 AvFILLp (av) = 0;
2874 ary [0] = newSViv (count);
2875
2876 return newRV_noinc ((SV *)av);
2877}
2878
2879/* semaphore */
2880
2881static void
2882coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2883{
2884 SV *count_sv = AvARRAY (av)[0];
2885 IV count = SvIVX (count_sv);
2886
2887 count += adjust;
2888 SvIVX (count_sv) = count;
2889
2890 /* now wake up as many waiters as are expected to lock */
2891 while (count > 0 && AvFILLp (av) > 0)
2892 {
2893 SV *cb;
2894
2895 /* swap first two elements so we can shift a waiter */
2896 AvARRAY (av)[0] = AvARRAY (av)[1];
2897 AvARRAY (av)[1] = count_sv;
2898 cb = av_shift (av);
2899
2900 if (SvOBJECT (cb))
2901 {
2902 api_ready (aTHX_ cb);
2903 --count;
2904 }
2905 else if (SvTYPE (cb) == SVt_PVCV)
2906 {
2907 dSP;
2908 PUSHMARK (SP);
2909 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2910 PUTBACK;
2911 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2912 }
2913
2914 SvREFCNT_dec (cb);
2915 }
2916}
2917
2918static void
2919coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2920{
2921 /* call $sem->adjust (0) to possibly wake up some other waiters */
2922 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2923}
2924
2925static int
2926slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2927{
2928 AV *av = (AV *)frame->data;
2929 SV *count_sv = AvARRAY (av)[0];
2930 SV *coro_hv = SvRV (coro_current);
2931
2932 /* if we are about to throw, don't actually acquire the lock, just throw */
2933 if (CORO_THROW)
2934 return 0;
2935 else if (SvIVX (count_sv) > 0)
2936 {
2937 frame->destroy = 0;
2938
2939 if (acquire)
2940 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2941 else
2942 coro_semaphore_adjust (aTHX_ av, 0);
2943
2944 return 0;
2945 }
2946 else
2947 {
2948 int i;
2949 /* if we were woken up but can't down, we look through the whole */
2950 /* waiters list and only add us if we aren't in there already */
2951 /* this avoids some degenerate memory usage cases */
2952 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2953 if (AvARRAY (av)[i] == coro_hv)
2954 return 1;
2955
2956 av_push (av, SvREFCNT_inc (coro_hv));
2957 return 1;
2958 }
2959}
2960
2961static int
2962slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2963{
2964 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2965}
2966
2967static int
2968slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2969{
2970 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2971}
2972
2973static void
2974slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2975{
2976 AV *av = (AV *)SvRV (arg [0]);
2977
2978 if (SvIVX (AvARRAY (av)[0]) > 0)
2979 {
2980 frame->data = (void *)av;
2981 frame->prepare = prepare_nop;
2982 }
2983 else
2984 {
2985 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2986
2987 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2988 frame->prepare = prepare_schedule;
2989 /* to avoid race conditions when a woken-up coro gets terminated */
2990 /* we arrange for a temporary on_destroy that calls adjust (0) */
2991 frame->destroy = coro_semaphore_destroy;
2992 }
2993}
2994
2995static void
2996slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2997{
2998 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2999 frame->check = slf_check_semaphore_down;
3000}
3001
3002static void
3003slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3004{
3005 if (items >= 2)
3006 {
3007 /* callback form */
3008 AV *av = (AV *)SvRV (arg [0]);
3009 SV *cb_cv = s_get_cv_croak (arg [1]);
3010
3011 av_push (av, SvREFCNT_inc_NN (cb_cv));
3012
3013 if (SvIVX (AvARRAY (av)[0]) > 0)
3014 coro_semaphore_adjust (aTHX_ av, 0);
3015
3016 frame->prepare = prepare_nop;
3017 frame->check = slf_check_nop;
3018 }
3019 else
3020 {
3021 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3022 frame->check = slf_check_semaphore_wait;
3023 }
3024}
3025
3026/* signal */
3027
3028static void
3029coro_signal_wake (pTHX_ AV *av, int count)
3030{
3031 SvIVX (AvARRAY (av)[0]) = 0;
3032
3033 /* now signal count waiters */
3034 while (count > 0 && AvFILLp (av) > 0)
3035 {
3036 SV *cb;
3037
3038 /* swap first two elements so we can shift a waiter */
3039 cb = AvARRAY (av)[0];
3040 AvARRAY (av)[0] = AvARRAY (av)[1];
3041 AvARRAY (av)[1] = cb;
3042
3043 cb = av_shift (av);
3044
3045 if (SvTYPE (cb) == SVt_PVCV)
3046 {
3047 dSP;
3048 PUSHMARK (SP);
3049 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3050 PUTBACK;
3051 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3052 }
3053 else
3054 {
3055 api_ready (aTHX_ cb);
3056 sv_setiv (cb, 0); /* signal waiter */
3057 }
3058
3059 SvREFCNT_dec (cb);
3060
3061 --count;
3062 }
3063}
3064
3065static int
3066slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3067{
3068 /* if we are about to throw, also stop waiting */
3069 return SvROK ((SV *)frame->data) && !CORO_THROW;
3070}
3071
3072static void
3073slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3074{
3075 AV *av = (AV *)SvRV (arg [0]);
3076
3077 if (items >= 2)
3078 {
3079 SV *cb_cv = s_get_cv_croak (arg [1]);
3080 av_push (av, SvREFCNT_inc_NN (cb_cv));
3081
3082 if (SvIVX (AvARRAY (av)[0]))
3083 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3084
3085 frame->prepare = prepare_nop;
3086 frame->check = slf_check_nop;
3087 }
3088 else if (SvIVX (AvARRAY (av)[0]))
3089 {
3090 SvIVX (AvARRAY (av)[0]) = 0;
3091 frame->prepare = prepare_nop;
3092 frame->check = slf_check_nop;
3093 }
3094 else
3095 {
3096 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3097
3098 av_push (av, waiter);
3099
3100 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3101 frame->prepare = prepare_schedule;
3102 frame->check = slf_check_signal_wait;
3103 }
3104}
3105
3106/*****************************************************************************/
3107/* Coro::AIO */
3108
3109#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3110
3111/* helper storage struct */
3112struct io_state
3113{
3114 int errorno;
3115 I32 laststype; /* U16 in 5.10.0 */
3116 int laststatval;
3117 Stat_t statcache;
3118};
3119
3120static void
3121coro_aio_callback (pTHX_ CV *cv)
3122{
3123 dXSARGS;
3124 AV *state = (AV *)S_GENSUB_ARG;
3125 SV *coro = av_pop (state);
3126 SV *data_sv = newSV (sizeof (struct io_state));
3127
3128 av_extend (state, items - 1);
3129
3130 sv_upgrade (data_sv, SVt_PV);
3131 SvCUR_set (data_sv, sizeof (struct io_state));
3132 SvPOK_only (data_sv);
3133
3134 {
3135 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3136
3137 data->errorno = errno;
3138 data->laststype = PL_laststype;
3139 data->laststatval = PL_laststatval;
3140 data->statcache = PL_statcache;
3141 }
3142
3143 /* now build the result vector out of all the parameters and the data_sv */
3144 {
3145 int i;
3146
3147 for (i = 0; i < items; ++i)
3148 av_push (state, SvREFCNT_inc_NN (ST (i)));
3149 }
3150
3151 av_push (state, data_sv);
3152
3153 api_ready (aTHX_ coro);
3154 SvREFCNT_dec (coro);
3155 SvREFCNT_dec ((AV *)state);
3156}
3157
3158static int
3159slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3160{
3161 AV *state = (AV *)frame->data;
3162
3163 /* if we are about to throw, return early */
3164 /* this does not cancel the aio request, but at least */
3165 /* it quickly returns */
3166 if (CORO_THROW)
3167 return 0;
3168
3169 /* one element that is an RV? repeat! */
3170 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3171 return 1;
3172
3173 /* restore status */
3174 {
3175 SV *data_sv = av_pop (state);
3176 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3177
3178 errno = data->errorno;
3179 PL_laststype = data->laststype;
3180 PL_laststatval = data->laststatval;
3181 PL_statcache = data->statcache;
3182
3183 SvREFCNT_dec (data_sv);
3184 }
3185
3186 /* push result values */
3187 {
3188 dSP;
3189 int i;
3190
3191 EXTEND (SP, AvFILLp (state) + 1);
3192 for (i = 0; i <= AvFILLp (state); ++i)
3193 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3194
3195 PUTBACK;
3196 }
890 3197
891 return 0; 3198 return 0;
892} 3199}
893 3200
894static void 3201static void
895api_ready (SV *coro) 3202slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
896{ 3203{
897 dTHX; 3204 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
898
899 if (SvROK (coro))
900 coro = SvRV (coro);
901
902 LOCK;
903 coro_enq (aTHX_ SvREFCNT_inc (coro));
904 UNLOCK;
905}
906
907static void
908api_schedule (void)
909{
910 dTHX;
911
912 SV *prev, *next;
913
914 LOCK;
915
916 prev = SvRV (GvSV (coro_current)); 3205 SV *coro_hv = SvRV (coro_current);
917 next = coro_deq (aTHX_ PRIO_MIN); 3206 struct coro *coro = SvSTATE_hv (coro_hv);
918 3207
919 if (!next) 3208 /* put our coroutine id on the state arg */
920 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3209 av_push (state, SvREFCNT_inc_NN (coro_hv));
921 3210
922 /* free this only after the transfer */ 3211 /* first see whether we have a non-zero priority and set it as AIO prio */
923 coro_mortal = prev; 3212 if (coro->prio)
924 SV_CORO (prev, "Coro::schedule"); 3213 {
3214 dSP;
925 3215
926 SvRV (GvSV (coro_current)) = next; 3216 static SV *prio_cv;
3217 static SV *prio_sv;
927 3218
928 SV_CORO (next, "Coro::schedule"); 3219 if (ecb_expect_false (!prio_cv))
3220 {
3221 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3222 prio_sv = newSViv (0);
3223 }
929 3224
930 UNLOCK; 3225 PUSHMARK (SP);
3226 sv_setiv (prio_sv, coro->prio);
3227 XPUSHs (prio_sv);
931 3228
932 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3229 PUTBACK;
933 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3230 call_sv (prio_cv, G_VOID | G_DISCARD);
934} 3231 }
935 3232
936static void 3233 /* now call the original request */
937api_cede (void) 3234 {
938{ 3235 dSP;
939 dTHX; 3236 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3237 int i;
940 3238
941 LOCK; 3239 PUSHMARK (SP);
942 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943 UNLOCK;
944 3240
945 api_schedule (); 3241 /* first push all args to the stack */
946} 3242 EXTEND (SP, items + 1);
947 3243
3244 for (i = 0; i < items; ++i)
3245 PUSHs (arg [i]);
3246
3247 /* now push the callback closure */
3248 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3249
3250 /* now call the AIO function - we assume our request is uncancelable */
3251 PUTBACK;
3252 call_sv ((SV *)req, G_VOID | G_DISCARD);
3253 }
3254
3255 /* now that the request is going, we loop till we have a result */
3256 frame->data = (void *)state;
3257 frame->prepare = prepare_schedule;
3258 frame->check = slf_check_aio_req;
3259}
3260
3261static void
3262coro_aio_req_xs (pTHX_ CV *cv)
3263{
3264 dXSARGS;
3265
3266 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3267
3268 XSRETURN_EMPTY;
3269}
3270
3271/*****************************************************************************/
3272
3273#if CORO_CLONE
3274# include "clone.c"
3275#endif
3276
3277/*****************************************************************************/
3278
3279static SV *
3280coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3281{
3282 SV *coro_sv;
3283 struct coro *coro;
3284 MAGIC *mg;
3285 HV *hv;
3286 SV *cb;
3287 int i;
3288
3289 if (argc > 0)
3290 {
3291 cb = s_get_cv_croak (argv [0]);
3292
3293 if (!is_coro)
3294 {
3295 if (CvISXSUB (cb))
3296 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3297
3298 if (!CvROOT (cb))
3299 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3300 }
3301 }
3302
3303 Newz (0, coro, 1, struct coro);
3304 coro->args = newAV ();
3305 coro->flags = CF_NEW;
3306
3307 if (coro_first) coro_first->prev = coro;
3308 coro->next = coro_first;
3309 coro_first = coro;
3310
3311 coro->hv = hv = newHV ();
3312 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3313 mg->mg_flags |= MGf_DUP;
3314 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3315
3316 if (argc > 0)
3317 {
3318 av_extend (coro->args, argc + is_coro - 1);
3319
3320 if (is_coro)
3321 {
3322 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3323 cb = (SV *)cv_coro_run;
3324 }
3325
3326 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3327
3328 for (i = 1; i < argc; i++)
3329 av_push (coro->args, newSVsv (argv [i]));
3330 }
3331
3332 return coro_sv;
3333}
3334
3335#ifndef __cplusplus
3336ecb_cold XS(boot_Coro__State);
3337#endif
3338
3339#if CORO_JIT
3340
3341static void ecb_noinline ecb_cold
3342pushav_3uv (pTHX_ UV a, UV b, UV c)
3343{
3344 dSP;
3345 AV *av = newAV ();
3346
3347 av_store (av, 2, newSVuv (c));
3348 av_store (av, 1, newSVuv (b));
3349 av_store (av, 0, newSVuv (a));
3350
3351 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3352
3353 PUTBACK;
3354}
3355
3356static void ecb_noinline ecb_cold
3357jit_init (pTHX)
3358{
3359 dSP;
3360 SV *load, *save;
3361 char *map_base;
3362 char *load_ptr, *save_ptr;
3363 STRLEN load_len, save_len;
3364 int count;
3365
3366 PUSHMARK (SP);
3367 PUTBACK;
3368#define VARx(name,expr,type) pushav_3uv (aTHX_ (UV)&(expr), offsetof (perl_slots, name), sizeof (type));
3369# include "state.h"
3370#undef VARx
3371 count = call_pv ("Coro::State::_jit", G_ARRAY);
3372 SPAGAIN;
3373
3374 save = POPs; save_ptr = SvPVbyte (save, save_len);
3375 load = POPs; load_ptr = SvPVbyte (load, load_len);
3376
3377 map_base = mmap (0, load_len + save_len + 16, PROT_EXEC | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3378
3379 assert (("Coro: unable mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3380
3381 load_perl_slots = (load_save_perl_slots_type)map_base;
3382 memcpy (map_base, load_ptr, load_len);
3383
3384 map_base += (load_len + 15) & ~15;
3385
3386 save_perl_slots = (load_save_perl_slots_type)map_base;
3387 memcpy (map_base, save_ptr, save_len);
3388}
3389
3390#endif
3391
948MODULE = Coro::State PACKAGE = Coro::State 3392MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
949 3393
950PROTOTYPES: ENABLE 3394PROTOTYPES: DISABLE
951 3395
952BOOT: 3396BOOT:
953{ /* {} necessary for stoopid perl-5.6.x */ 3397{
954#ifdef USE_ITHREADS 3398#ifdef USE_ITHREADS
955 MUTEX_INIT (&coro_mutex); 3399# if CORO_PTHREAD
3400 coro_thx = PERL_GET_CONTEXT;
3401# endif
956#endif 3402#endif
3403 BOOT_PAGESIZE;
957 3404
958 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3405 /* perl defines these to check for existance first, but why it doesn't */
959 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3406 /* just create them one at init time is not clear to me, except for */
3407 /* programs trying to delete them, but... */
3408 /* anyway, we declare this as invalid and make sure they are initialised here */
3409 DEFSV;
3410 ERRSV;
3411
3412 cctx_current = cctx_new_empty ();
3413
3414 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3415 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3416
3417 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3418 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3419 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3420
3421 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3422 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3423 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3424
960 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3425 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961 3426
962 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3427 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
963 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3428 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
964 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3429 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
965 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3430 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
966 3431
967 main_mainstack = PL_mainstack; 3432 main_mainstack = PL_mainstack;
3433 main_top_env = PL_top_env;
968 3434
3435 while (main_top_env->je_prev)
3436 main_top_env = main_top_env->je_prev;
3437
3438 {
3439 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3440
3441 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3442 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3443
3444 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3445 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3446 }
3447
969 coroapi.ver = CORO_API_VERSION; 3448 coroapi.ver = CORO_API_VERSION;
3449 coroapi.rev = CORO_API_REVISION;
3450
970 coroapi.transfer = api_transfer; 3451 coroapi.transfer = api_transfer;
971}
972 3452
973Coro::State 3453 coroapi.sv_state = SvSTATE_;
974_newprocess(args) 3454 coroapi.execute_slf = api_execute_slf;
975 SV * args 3455 coroapi.prepare_nop = prepare_nop;
976 PROTOTYPE: $ 3456 coroapi.prepare_schedule = prepare_schedule;
3457 coroapi.prepare_cede = prepare_cede;
3458 coroapi.prepare_cede_notself = prepare_cede_notself;
3459
3460 time_init (aTHX);
3461
3462 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3463#if CORO_JIT
3464 PUTBACK;
3465 require_pv ("Coro/jit-" CORO_JIT_TYPE ".pl");
3466 jit_init (aTHX);
3467 perl_eval_pv ("undef &Coro::State::_jit", 1);
3468 SPAGAIN;
3469#endif
3470}
3471
3472SV *
3473new (SV *klass, ...)
3474 ALIAS:
3475 Coro::new = 1
977 CODE: 3476 CODE:
978 Coro__State coro; 3477 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
979 3478 OUTPUT:
980 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981 croak ("Coro::State::_newprocess expects an arrayref");
982
983 Newz (0, coro, 1, struct coro);
984
985 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
986 /*coro->mainstack = 0; *//*actual work is done inside transfer */
987 /*coro->stack = 0;*/
988
989 /* same as JMPENV_BOOTSTRAP */
990 /* we might be able to recycle start_env, but safe is safe */
991 /*Zero(&coro->start_env, 1, JMPENV);*/
992 coro->start_env.je_ret = -1;
993 coro->start_env.je_mustcatch = TRUE;
994
995 RETVAL = coro;
996 OUTPUT:
997 RETVAL 3479 RETVAL
998 3480
999void 3481void
1000transfer(prev, next, flags) 3482transfer (...)
1001 SV *prev
1002 SV *next
1003 int flags
1004 PROTOTYPE: @ 3483 PROTOTYPE: $$
1005 CODE: 3484 CODE:
1006 PUTBACK; 3485 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1007 SV_CORO (next, "Coro::transfer");
1008 SV_CORO (prev, "Coro::transfer");
1009 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1010 SPAGAIN;
1011 3486
1012void 3487void
1013DESTROY(coro)
1014 Coro::State coro
1015 CODE:
1016
1017 if (coro->mainstack && coro->mainstack != main_mainstack)
1018 {
1019 struct coro temp;
1020
1021 PUTBACK;
1022 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1023 LOAD (aTHX_ coro);
1024 SPAGAIN;
1025
1026 destroy_stacks (aTHX);
1027
1028 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029 SPAGAIN;
1030
1031 coro->mainstack = 0;
1032 }
1033
1034 deallocate_stack (coro);
1035 SvREFCNT_dec (coro->args);
1036 Safefree (coro);
1037
1038void
1039_exit(code) 3488_exit (int code)
1040 int code
1041 PROTOTYPE: $ 3489 PROTOTYPE: $
1042 CODE: 3490 CODE:
1043 _exit (code); 3491 _exit (code);
1044 3492
1045MODULE = Coro::State PACKAGE = Coro::Cont 3493SV *
3494clone (Coro::State coro)
3495 CODE:
3496{
3497#if CORO_CLONE
3498 struct coro *ncoro = coro_clone (aTHX_ coro);
3499 MAGIC *mg;
3500 /* TODO: too much duplication */
3501 ncoro->hv = newHV ();
3502 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3503 mg->mg_flags |= MGf_DUP;
3504 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3505#else
3506 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3507#endif
3508}
3509 OUTPUT:
3510 RETVAL
1046 3511
1047# this is slightly dirty (should expose a c-level api) 3512int
3513cctx_stacksize (int new_stacksize = 0)
3514 PROTOTYPE: ;$
3515 CODE:
3516 RETVAL = cctx_stacksize;
3517 if (new_stacksize)
3518 {
3519 cctx_stacksize = new_stacksize;
3520 ++cctx_gen;
3521 }
3522 OUTPUT:
3523 RETVAL
3524
3525int
3526cctx_max_idle (int max_idle = 0)
3527 PROTOTYPE: ;$
3528 CODE:
3529 RETVAL = cctx_max_idle;
3530 if (max_idle > 1)
3531 cctx_max_idle = max_idle;
3532 OUTPUT:
3533 RETVAL
3534
3535int
3536cctx_count ()
3537 PROTOTYPE:
3538 CODE:
3539 RETVAL = cctx_count;
3540 OUTPUT:
3541 RETVAL
3542
3543int
3544cctx_idle ()
3545 PROTOTYPE:
3546 CODE:
3547 RETVAL = cctx_idle;
3548 OUTPUT:
3549 RETVAL
1048 3550
1049void 3551void
1050yield(...) 3552list ()
1051 PROTOTYPE: @ 3553 PROTOTYPE:
3554 PPCODE:
3555{
3556 struct coro *coro;
3557 for (coro = coro_first; coro; coro = coro->next)
3558 if (coro->hv)
3559 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3560}
3561
3562void
3563call (Coro::State coro, SV *coderef)
3564 ALIAS:
3565 eval = 1
3566 CODE:
3567{
3568 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3569 {
3570 struct coro *current = SvSTATE_current;
3571 struct CoroSLF slf_save;
3572
3573 if (current != coro)
3574 {
3575 PUTBACK;
3576 save_perl (aTHX_ current);
3577 load_perl (aTHX_ coro);
3578 /* the coro is most likely in an active SLF call.
3579 * while not strictly required (the code we execute is
3580 * not allowed to call any SLF functions), it's cleaner
3581 * to reinitialise the slf_frame and restore it later.
3582 * This might one day allow us to actually do SLF calls
3583 * from code executed here.
3584 */
3585 slf_save = slf_frame;
3586 slf_frame.prepare = 0;
3587 SPAGAIN;
3588 }
3589
3590 PUSHSTACK;
3591
3592 PUSHMARK (SP);
3593 PUTBACK;
3594
3595 if (ix)
3596 eval_sv (coderef, 0);
3597 else
3598 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3599
3600 POPSTACK;
3601 SPAGAIN;
3602
3603 if (current != coro)
3604 {
3605 PUTBACK;
3606 slf_frame = slf_save;
3607 save_perl (aTHX_ coro);
3608 load_perl (aTHX_ current);
3609 SPAGAIN;
3610 }
3611 }
3612}
3613
3614SV *
3615is_ready (Coro::State coro)
3616 PROTOTYPE: $
3617 ALIAS:
3618 is_ready = CF_READY
3619 is_running = CF_RUNNING
3620 is_new = CF_NEW
3621 is_destroyed = CF_ZOMBIE
3622 is_zombie = CF_ZOMBIE
3623 is_suspended = CF_SUSPENDED
3624 CODE:
3625 RETVAL = boolSV (coro->flags & ix);
3626 OUTPUT:
3627 RETVAL
3628
3629void
3630throw (Coro::State self, SV *exception = &PL_sv_undef)
3631 PROTOTYPE: $;$
1052 CODE: 3632 CODE:
1053 static SV *returnstk; 3633{
1054 SV *sv; 3634 struct coro *current = SvSTATE_current;
1055 AV *defav = GvAV (PL_defgv); 3635 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1056 struct coro *prev, *next;
1057
1058 if (!returnstk)
1059 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061 /* set up @_ -- ugly */
1062 av_clear (defav);
1063 av_fill (defav, items - 1);
1064 while (items--)
1065 av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067 SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068 sv = av_pop ((AV *)SvRV (returnstk));
1069 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071 SvREFCNT_dec (sv); 3636 SvREFCNT_dec (*exceptionp);
1072 3637 SvGETMAGIC (exception);
1073 transfer (aTHX_ prev, next, 0); 3638 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1074
1075MODULE = Coro::State PACKAGE = Coro
1076
1077# this is slightly dirty (should expose a c-level api)
1078
1079BOOT:
1080{
1081 int i;
1082 HV *stash = gv_stashpv ("Coro", TRUE);
1083
1084 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090
1091 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093
1094 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1095 coro_ready[i] = newAV ();
1096
1097 {
1098 SV *sv = perl_get_sv("Coro::API", 1);
1099
1100 coroapi.schedule = api_schedule;
1101 coroapi.cede = api_cede;
1102 coroapi.ready = api_ready;
1103 coroapi.nready = &coro_nready;
1104 coroapi.current = coro_current;
1105
1106 GCoroAPI = &coroapi;
1107 sv_setiv(sv, (IV)&coroapi);
1108 SvREADONLY_on(sv);
1109 }
1110} 3639}
1111
1112#if !PERL_MICRO
1113 3640
1114void 3641void
1115ready(self) 3642api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1116 SV * self 3643 PROTOTYPE: $;$
3644 C_ARGS: aTHX_ coro, flags
3645
3646SV *
3647has_cctx (Coro::State coro)
1117 PROTOTYPE: $ 3648 PROTOTYPE: $
1118 CODE: 3649 CODE:
1119 api_ready (self); 3650 /* maybe manage the running flag differently */
1120 3651 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1121#endif 3652 OUTPUT:
3653 RETVAL
1122 3654
1123int 3655int
3656is_traced (Coro::State coro)
3657 PROTOTYPE: $
3658 CODE:
3659 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3660 OUTPUT:
3661 RETVAL
3662
3663UV
3664rss (Coro::State coro)
3665 PROTOTYPE: $
3666 ALIAS:
3667 usecount = 1
3668 CODE:
3669 switch (ix)
3670 {
3671 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3672 case 1: RETVAL = coro->usecount; break;
3673 }
3674 OUTPUT:
3675 RETVAL
3676
3677void
3678force_cctx ()
3679 PROTOTYPE:
3680 CODE:
3681 cctx_current->idle_sp = 0;
3682
3683void
3684swap_defsv (Coro::State self)
3685 PROTOTYPE: $
3686 ALIAS:
3687 swap_defav = 1
3688 CODE:
3689 if (!self->slot)
3690 croak ("cannot swap state with coroutine that has no saved state,");
3691 else
3692 {
3693 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3694 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3695
3696 SV *tmp = *src; *src = *dst; *dst = tmp;
3697 }
3698
3699void
3700cancel (Coro::State self)
3701 CODE:
3702 coro_state_destroy (aTHX_ self);
3703
3704SV *
3705enable_times (int enabled = enable_times)
3706 CODE:
3707{
3708 RETVAL = boolSV (enable_times);
3709
3710 if (enabled != enable_times)
3711 {
3712 enable_times = enabled;
3713
3714 coro_times_update ();
3715 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3716 }
3717}
3718 OUTPUT:
3719 RETVAL
3720
3721void
3722times (Coro::State self)
3723 PPCODE:
3724{
3725 struct coro *current = SvSTATE (coro_current);
3726
3727 if (ecb_expect_false (current == self))
3728 {
3729 coro_times_update ();
3730 coro_times_add (SvSTATE (coro_current));
3731 }
3732
3733 EXTEND (SP, 2);
3734 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3735 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3736
3737 if (ecb_expect_false (current == self))
3738 coro_times_sub (SvSTATE (coro_current));
3739}
3740
3741void
3742swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3743 CODE:
3744{
3745 struct coro *current = SvSTATE_current;
3746
3747 if (current == coro)
3748 SWAP_SVS (current);
3749
3750 if (!coro->swap_sv)
3751 coro->swap_sv = newAV ();
3752
3753 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3754 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3755
3756 if (current == coro)
3757 SWAP_SVS (current);
3758}
3759
3760
3761MODULE = Coro::State PACKAGE = Coro
3762
3763BOOT:
3764{
3765 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3766 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3767 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3768 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3769 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3770 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3771 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3772 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3773
3774 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3775 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3776 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3777 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3778
3779 coro_stash = gv_stashpv ("Coro", TRUE);
3780
3781 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3782 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3783 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3784 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3785 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3786 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3787
3788 {
3789 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3790
3791 coroapi.schedule = api_schedule;
3792 coroapi.schedule_to = api_schedule_to;
3793 coroapi.cede = api_cede;
3794 coroapi.cede_notself = api_cede_notself;
3795 coroapi.ready = api_ready;
3796 coroapi.is_ready = api_is_ready;
3797 coroapi.nready = coro_nready;
3798 coroapi.current = coro_current;
3799
3800 /*GCoroAPI = &coroapi;*/
3801 sv_setiv (sv, (IV)&coroapi);
3802 SvREADONLY_on (sv);
3803 }
3804}
3805
3806SV *
3807async (...)
3808 PROTOTYPE: &@
3809 CODE:
3810 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3811 api_ready (aTHX_ RETVAL);
3812 OUTPUT:
3813 RETVAL
3814
3815void
3816_destroy (Coro::State coro)
3817 CODE:
3818 /* used by the manager thread */
3819 coro_state_destroy (aTHX_ coro);
3820
3821void
3822on_destroy (Coro::State coro, SV *cb)
3823 CODE:
3824 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3825
3826void
3827join (...)
3828 CODE:
3829 CORO_EXECUTE_SLF_XS (slf_init_join);
3830
3831void
3832terminate (...)
3833 CODE:
3834 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3835
3836void
3837cancel (...)
3838 CODE:
3839 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3840
3841int
3842safe_cancel (Coro::State self, ...)
3843 C_ARGS: aTHX_ self, &ST (1), items - 1
3844
3845void
3846schedule (...)
3847 CODE:
3848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3849
3850void
3851schedule_to (...)
3852 CODE:
3853 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3854
3855void
3856cede_to (...)
3857 CODE:
3858 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3859
3860void
3861cede (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_cede);
3864
3865void
3866cede_notself (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3869
3870void
3871_set_current (SV *current)
3872 PROTOTYPE: $
3873 CODE:
3874 SvREFCNT_dec (SvRV (coro_current));
3875 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3876
3877void
3878_set_readyhook (SV *hook)
3879 PROTOTYPE: $
3880 CODE:
3881 SvREFCNT_dec (coro_readyhook);
3882 SvGETMAGIC (hook);
3883 if (SvOK (hook))
3884 {
3885 coro_readyhook = newSVsv (hook);
3886 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3887 }
3888 else
3889 {
3890 coro_readyhook = 0;
3891 CORO_READYHOOK = 0;
3892 }
3893
3894int
3895prio (Coro::State coro, int newprio = 0)
3896 PROTOTYPE: $;$
3897 ALIAS:
3898 nice = 1
3899 CODE:
3900{
3901 RETVAL = coro->prio;
3902
3903 if (items > 1)
3904 {
3905 if (ix)
3906 newprio = coro->prio - newprio;
3907
3908 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3909 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3910
3911 coro->prio = newprio;
3912 }
3913}
3914 OUTPUT:
3915 RETVAL
3916
3917SV *
3918ready (SV *self)
3919 PROTOTYPE: $
3920 CODE:
3921 RETVAL = boolSV (api_ready (aTHX_ self));
3922 OUTPUT:
3923 RETVAL
3924
3925int
1124nready(...) 3926nready (...)
1125 PROTOTYPE: 3927 PROTOTYPE:
1126 CODE: 3928 CODE:
1127 RETVAL = coro_nready; 3929 RETVAL = coro_nready;
1128 OUTPUT: 3930 OUTPUT:
1129 RETVAL 3931 RETVAL
1130 3932
1131void 3933void
1132schedule(...) 3934suspend (Coro::State self)
1133 PROTOTYPE: 3935 PROTOTYPE: $
1134 CODE: 3936 CODE:
1135 api_schedule (); 3937 self->flags |= CF_SUSPENDED;
1136 3938
1137void 3939void
1138cede(...) 3940resume (Coro::State self)
1139 PROTOTYPE: 3941 PROTOTYPE: $
1140 CODE: 3942 CODE:
3943 self->flags &= ~CF_SUSPENDED;
3944
3945void
3946_pool_handler (...)
3947 CODE:
3948 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3949
3950void
3951async_pool (SV *cv, ...)
3952 PROTOTYPE: &@
3953 PPCODE:
3954{
3955 HV *hv = (HV *)av_pop (av_async_pool);
3956 AV *av = newAV ();
3957 SV *cb = ST (0);
3958 int i;
3959
3960 av_extend (av, items - 2);
3961 for (i = 1; i < items; ++i)
3962 av_push (av, SvREFCNT_inc_NN (ST (i)));
3963
3964 if ((SV *)hv == &PL_sv_undef)
3965 {
3966 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3967 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3968 SvREFCNT_dec (sv);
3969 }
3970
3971 {
3972 struct coro *coro = SvSTATE_hv (hv);
3973
3974 assert (!coro->invoke_cb);
3975 assert (!coro->invoke_av);
3976 coro->invoke_cb = SvREFCNT_inc (cb);
3977 coro->invoke_av = av;
3978 }
3979
3980 api_ready (aTHX_ (SV *)hv);
3981
3982 if (GIMME_V != G_VOID)
3983 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3984 else
3985 SvREFCNT_dec (hv);
3986}
3987
3988SV *
3989rouse_cb ()
3990 PROTOTYPE:
3991 CODE:
3992 RETVAL = coro_new_rouse_cb (aTHX);
3993 OUTPUT:
3994 RETVAL
3995
3996void
3997rouse_wait (...)
3998 PROTOTYPE: ;$
3999 PPCODE:
4000 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4001
4002void
4003on_enter (SV *block)
4004 ALIAS:
4005 on_leave = 1
4006 PROTOTYPE: &
4007 CODE:
4008{
4009 struct coro *coro = SvSTATE_current;
4010 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4011
4012 block = s_get_cv_croak (block);
4013
4014 if (!*avp)
4015 *avp = newAV ();
4016
4017 av_push (*avp, SvREFCNT_inc (block));
4018
4019 if (!ix)
4020 on_enterleave_call (aTHX_ block);
4021
4022 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4023 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4024 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4025}
4026
4027
4028MODULE = Coro::State PACKAGE = PerlIO::cede
4029
4030BOOT:
4031 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4032
4033
4034MODULE = Coro::State PACKAGE = Coro::Semaphore
4035
4036SV *
4037new (SV *klass, SV *count = 0)
4038 CODE:
4039{
4040 int semcnt = 1;
4041
4042 if (count)
4043 {
4044 SvGETMAGIC (count);
4045
4046 if (SvOK (count))
4047 semcnt = SvIV (count);
4048 }
4049
4050 RETVAL = sv_bless (
4051 coro_waitarray_new (aTHX_ semcnt),
4052 GvSTASH (CvGV (cv))
4053 );
4054}
4055 OUTPUT:
4056 RETVAL
4057
4058# helper for Coro::Channel and others
4059SV *
4060_alloc (int count)
4061 CODE:
4062 RETVAL = coro_waitarray_new (aTHX_ count);
4063 OUTPUT:
4064 RETVAL
4065
4066SV *
4067count (SV *self)
4068 CODE:
4069 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4070 OUTPUT:
4071 RETVAL
4072
4073void
4074up (SV *self, int adjust = 1)
4075 ALIAS:
4076 adjust = 1
4077 CODE:
4078 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4079
4080void
4081down (...)
4082 CODE:
4083 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4084
4085void
4086wait (...)
4087 CODE:
4088 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4089
4090void
4091try (SV *self)
4092 PPCODE:
4093{
4094 AV *av = (AV *)SvRV (self);
4095 SV *count_sv = AvARRAY (av)[0];
4096 IV count = SvIVX (count_sv);
4097
4098 if (count > 0)
4099 {
4100 --count;
4101 SvIVX (count_sv) = count;
4102 XSRETURN_YES;
4103 }
4104 else
4105 XSRETURN_NO;
4106}
4107
4108void
4109waiters (SV *self)
4110 PPCODE:
4111{
4112 AV *av = (AV *)SvRV (self);
4113 int wcount = AvFILLp (av) + 1 - 1;
4114
4115 if (GIMME_V == G_SCALAR)
4116 XPUSHs (sv_2mortal (newSViv (wcount)));
4117 else
4118 {
4119 int i;
4120 EXTEND (SP, wcount);
4121 for (i = 1; i <= wcount; ++i)
4122 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4123 }
4124}
4125
4126MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4127
4128void
4129_may_delete (SV *sem, int count, int extra_refs)
4130 PPCODE:
4131{
4132 AV *av = (AV *)SvRV (sem);
4133
4134 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4135 && AvFILLp (av) == 0 /* no waiters, just count */
4136 && SvIV (AvARRAY (av)[0]) == count)
4137 XSRETURN_YES;
4138
4139 XSRETURN_NO;
4140}
4141
4142MODULE = Coro::State PACKAGE = Coro::Signal
4143
4144SV *
4145new (SV *klass)
4146 CODE:
4147 RETVAL = sv_bless (
4148 coro_waitarray_new (aTHX_ 0),
4149 GvSTASH (CvGV (cv))
4150 );
4151 OUTPUT:
4152 RETVAL
4153
4154void
4155wait (...)
4156 CODE:
4157 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4158
4159void
4160broadcast (SV *self)
4161 CODE:
4162{
4163 AV *av = (AV *)SvRV (self);
4164 coro_signal_wake (aTHX_ av, AvFILLp (av));
4165}
4166
4167void
4168send (SV *self)
4169 CODE:
4170{
4171 AV *av = (AV *)SvRV (self);
4172
4173 if (AvFILLp (av))
4174 coro_signal_wake (aTHX_ av, 1);
4175 else
4176 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4177}
4178
4179IV
4180awaited (SV *self)
4181 CODE:
4182 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4183 OUTPUT:
4184 RETVAL
4185
4186
4187MODULE = Coro::State PACKAGE = Coro::AnyEvent
4188
4189BOOT:
4190 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4191
4192void
4193_schedule (...)
4194 CODE:
4195{
4196 static int incede;
4197
1141 api_cede (); 4198 api_cede_notself (aTHX);
1142 4199
4200 ++incede;
4201 while (coro_nready >= incede && api_cede (aTHX))
4202 ;
4203
4204 sv_setsv (sv_activity, &PL_sv_undef);
4205 if (coro_nready >= incede)
4206 {
4207 PUSHMARK (SP);
4208 PUTBACK;
4209 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4210 }
4211
4212 --incede;
4213}
4214
4215
4216MODULE = Coro::State PACKAGE = Coro::AIO
4217
4218void
4219_register (char *target, char *proto, SV *req)
4220 CODE:
4221{
4222 SV *req_cv = s_get_cv_croak (req);
4223 /* newXSproto doesn't return the CV on 5.8 */
4224 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4225 sv_setpv ((SV *)slf_cv, proto);
4226 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4227}
4228
4229MODULE = Coro::State PACKAGE = Coro::Select
4230
4231void
4232patch_pp_sselect ()
4233 CODE:
4234 if (!coro_old_pp_sselect)
4235 {
4236 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4237 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4238 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4239 }
4240
4241void
4242unpatch_pp_sselect ()
4243 CODE:
4244 if (coro_old_pp_sselect)
4245 {
4246 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4247 coro_old_pp_sselect = 0;
4248 }
4249

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