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Comparing Coro/Coro/State.xs (file contents):
Revision 1.65 by root, Mon Dec 5 23:50:48 2005 UTC vs.
Revision 1.412 by root, Mon Jun 13 09:00:15 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
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
10 18
11#if PERL_VERSION < 6 19#include <stddef.h>
12# ifndef PL_ppaddr 20#include <stdio.h>
13# define PL_ppaddr ppaddr 21#include <errno.h>
14# endif 22#include <assert.h>
15# ifndef call_sv 23
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST 24#ifndef SVs_PADSTALE
28# define IS_PADCONST(v) 0 25# define SVs_PADSTALE 0
29# endif
30#endif 26#endif
31 27
32#include <signal.h> 28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
33 37
34#ifdef HAVE_MMAP 38#if 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
38# ifdef MAP_ANON 42# ifdef MAP_ANON
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 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 COP *curcop;
134 JMPENV *top_env;
135 233
234 CV *startcv; /* the CV to execute */
136 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
137 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;
138}; 266};
139 267
140typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
141typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
142 270
143/* mostly copied from op.c:cv_clone2 */ 271/* the following variables are effectively part of the perl context */
144STATIC AV * 272/* and get copied between struct coro and these variables */
145clone_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 /* APPLE doesn't have HAVE_MMAP though */
297 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
298 #ifndef CORO_JIT_TYPE
299 #if __x86_64 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "amd64-unix"
301 #elif __i386 && CORO_JIT_UNIXY
302 #define CORO_JIT_TYPE "x86-unix"
303 #endif
304 #endif
305#endif
306
307#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
308 #undef CORO_JIT
309#endif
310
311#if CORO_JIT
312 typedef void (*load_save_perl_slots_type)(perl_slots *);
313 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
314#endif
315
316/** Coro::Select ************************************************************/
317
318static OP *(*coro_old_pp_sselect) (pTHX);
319static SV *coro_select_select;
320
321/* horrible hack, but if it works... */
322static OP *
323coro_pp_sselect (pTHX)
146{ 324{
147 AV *av; 325 dSP;
148 I32 ix; 326 PUSHMARK (SP - 4); /* fake argument list */
149 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 327 XPUSHs (coro_select_select);
150 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 328 PUTBACK;
151 SV **pname = AvARRAY (protopad_name); 329
152 SV **ppad = AvARRAY (protopad); 330 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
153 I32 fname = AvFILLp (protopad_name); 331 PL_op->op_flags |= OPf_STACKED;
154 I32 fpad = AvFILLp (protopad); 332 PL_op->op_private = 0;
333 return PL_ppaddr [OP_ENTERSUB](aTHX);
334}
335
336/** time stuff **************************************************************/
337
338#ifdef HAS_GETTIMEOFDAY
339
340ECB_INLINE void
341coro_u2time (pTHX_ UV ret[2])
342{
343 struct timeval tv;
344 gettimeofday (&tv, 0);
345
346 ret [0] = tv.tv_sec;
347 ret [1] = tv.tv_usec;
348}
349
350ECB_INLINE double
351coro_nvtime (void)
352{
353 struct timeval tv;
354 gettimeofday (&tv, 0);
355
356 return tv.tv_sec + tv.tv_usec * 1e-6;
357}
358
359ECB_INLINE void
360time_init (pTHX)
361{
362 nvtime = coro_nvtime;
363 u2time = coro_u2time;
364}
365
366#else
367
368ECB_INLINE void
369time_init (pTHX)
370{
371 SV **svp;
372
373 require_pv ("Time/HiRes.pm");
374
375 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
376
377 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
378 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
379
380 nvtime = INT2PTR (double (*)(), SvIV (*svp));
381
382 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
383 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
384}
385
386#endif
387
388/** lowlevel stuff **********************************************************/
389
390static SV * ecb_noinline
391coro_get_sv (pTHX_ const char *name, int create)
392{
393#if PERL_VERSION_ATLEAST (5,10,0)
394 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
395 get_sv (name, create);
396#endif
397 return get_sv (name, create);
398}
399
400static AV * ecb_noinline
401coro_get_av (pTHX_ const char *name, int create)
402{
403#if PERL_VERSION_ATLEAST (5,10,0)
404 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
405 get_av (name, create);
406#endif
407 return get_av (name, create);
408}
409
410static HV * ecb_noinline
411coro_get_hv (pTHX_ const char *name, int create)
412{
413#if PERL_VERSION_ATLEAST (5,10,0)
414 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
415 get_hv (name, create);
416#endif
417 return get_hv (name, create);
418}
419
420ECB_INLINE void
421coro_times_update (void)
422{
423#ifdef coro_clock_gettime
424 struct timespec ts;
425
426 ts.tv_sec = ts.tv_nsec = 0;
427 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
428 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
432 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
433#else
434 dTHX;
435 UV tv[2];
436
437 u2time (aTHX_ tv);
438 time_real [0] = tv [0];
439 time_real [1] = tv [1] * 1000;
440#endif
441}
442
443ECB_INLINE void
444coro_times_add (struct coro *c)
445{
446 c->t_real [1] += time_real [1];
447 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
448 c->t_real [0] += time_real [0];
449
450 c->t_cpu [1] += time_cpu [1];
451 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
452 c->t_cpu [0] += time_cpu [0];
453}
454
455ECB_INLINE void
456coro_times_sub (struct coro *c)
457{
458 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
459 c->t_real [1] -= time_real [1];
460 c->t_real [0] -= time_real [0];
461
462 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
463 c->t_cpu [1] -= time_cpu [1];
464 c->t_cpu [0] -= time_cpu [0];
465}
466
467/*****************************************************************************/
468/* magic glue */
469
470#define CORO_MAGIC_type_cv 26
471#define CORO_MAGIC_type_state PERL_MAGIC_ext
472
473#define CORO_MAGIC_NN(sv, type) \
474 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
475 ? SvMAGIC (sv) \
476 : mg_find (sv, type))
477
478#define CORO_MAGIC(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)) \
480 ? CORO_MAGIC_NN (sv, type) \
481 : 0)
482
483#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
484#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
485
486ECB_INLINE MAGIC *
487SvSTATEhv_p (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (ecb_expect_true (
492 SvTYPE (coro) == SVt_PVHV
493 && (mg = CORO_MAGIC_state (coro))
494 && mg->mg_virtual == &coro_state_vtbl
495 ))
496 return mg;
497
498 return 0;
499}
500
501ECB_INLINE struct coro *
502SvSTATE_ (pTHX_ SV *coro)
503{
504 MAGIC *mg;
505
506 if (SvROK (coro))
507 coro = SvRV (coro);
508
509 mg = SvSTATEhv_p (aTHX_ coro);
510 if (!mg)
511 croak ("Coro::State object required");
512
513 return (struct coro *)mg->mg_ptr;
514}
515
516#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
517
518/* faster than SvSTATE, but expects a coroutine hv */
519#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
520#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
521
522/*****************************************************************************/
523/* padlist management and caching */
524
525ECB_INLINE AV *
526coro_derive_padlist (pTHX_ CV *cv)
527{
528 AV *padlist = CvPADLIST (cv);
155 AV *newpadlist, *newpad_name, *newpad; 529 AV *newpadlist, *newpad;
156 SV **npad;
157
158 newpad_name = newAV ();
159 for (ix = fname; ix >= 0; ix--)
160 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162 newpad = newAV ();
163 av_fill (newpad, AvFILLp (protopad));
164 npad = AvARRAY (newpad);
165 530
166 newpadlist = newAV (); 531 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 532 AvREAL_off (newpadlist);
168 av_store (newpadlist, 0, (SV *) newpad_name); 533#if PERL_VERSION_ATLEAST (5,10,0)
534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
535#else
536 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
537#endif
538 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
539 --AvFILLp (padlist);
540
541 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
169 av_store (newpadlist, 1, (SV *) newpad); 542 av_store (newpadlist, 1, (SV *)newpad);
170 543
171 av = newAV (); /* will be @_ */ 544 return newpadlist;
172 av_extend (av, 0); 545}
173 av_store (newpad, 0, (SV *) av);
174 AvFLAGS (av) = AVf_REIFY;
175 546
176 for (ix = fpad; ix > 0; ix--) 547ECB_INLINE void
548free_padlist (pTHX_ AV *padlist)
549{
550 /* may be during global destruction */
551 if (!IN_DESTRUCT)
177 { 552 {
178 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 553 I32 i = AvFILLp (padlist);
179 554
180 if (namesv && namesv != &PL_sv_undef) 555 while (i > 0) /* special-case index 0 */
181 { 556 {
182 char *name = SvPVX (namesv); /* XXX */ 557 /* we try to be extra-careful here */
558 AV *av = (AV *)AvARRAY (padlist)[i--];
559 I32 j = AvFILLp (av);
183 560
184 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 561 while (j >= 0)
185 { /* lexical from outside? */ 562 SvREFCNT_dec (AvARRAY (av)[j--]);
186 npad[ix] = SvREFCNT_inc (ppad[ix]);
187 }
188 else
189 { /* our own lexical */
190 SV *sv;
191 if (*name == '&')
192 sv = SvREFCNT_inc (ppad[ix]);
193 else if (*name == '@')
194 sv = (SV *) newAV ();
195 else if (*name == '%')
196 sv = (SV *) newHV ();
197 else
198 sv = NEWSV (0, 0);
199 563
200#ifdef SvPADBUSY 564 AvFILLp (av) = -1;
201 if (!SvPADBUSY (sv)) 565 SvREFCNT_dec (av);
202#endif
203 SvPADMY_on (sv);
204
205 npad[ix] = sv;
206 }
207 } 566 }
208 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209 {
210 npad[ix] = SvREFCNT_inc (ppad[ix]);
211 }
212 else
213 {
214 SV *sv = NEWSV (0, 0);
215 SvPADTMP_on (sv);
216 npad[ix] = sv;
217 }
218 }
219 567
220#if 0 /* return -ENOTUNDERSTOOD */ 568 SvREFCNT_dec (AvARRAY (padlist)[0]);
221 /* Now that vars are all in place, clone nested closures. */
222 569
223 for (ix = fpad; ix > 0; ix--) {
224 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225 if (namesv
226 && namesv != &PL_sv_undef
227 && !(SvFLAGS(namesv) & SVf_FAKE)
228 && *SvPVX(namesv) == '&'
229 && CvCLONE(ppad[ix]))
230 {
231 CV *kid = cv_clone((CV*)ppad[ix]);
232 SvREFCNT_dec(ppad[ix]);
233 CvCLONE_on(kid);
234 SvPADMY_on(kid);
235 npad[ix] = (SV*)kid;
236 }
237 }
238#endif
239
240 return newpadlist;
241}
242
243STATIC void
244free_padlist (pTHX_ AV *padlist)
245{
246 /* may be during global destruction */
247 if (SvREFCNT (padlist))
248 {
249 I32 i = AvFILLp (padlist); 570 AvFILLp (padlist) = -1;
250 while (i >= 0)
251 {
252 SV **svp = av_fetch (padlist, i--, FALSE);
253 if (svp)
254 {
255 SV *sv;
256 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
257 SvREFCNT_dec (sv);
258
259 SvREFCNT_dec (*svp);
260 }
261 }
262
263 SvREFCNT_dec ((SV*)padlist); 571 SvREFCNT_dec ((SV*)padlist);
264 } 572 }
265} 573}
266 574
267STATIC int 575static int
268coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 576coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269{ 577{
270 AV *padlist; 578 AV *padlist;
271 AV *av = (AV *)mg->mg_obj; 579 AV *av = (AV *)mg->mg_obj;
580
581 /* perl manages to free our internal AV and _then_ call us */
582 if (IN_DESTRUCT)
583 return 0;
272 584
273 /* casting is fun. */ 585 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 586 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (aTHX_ padlist); 587 free_padlist (aTHX_ padlist);
276 588
277 SvREFCNT_dec (av); 589 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
278}
279 590
280#define PERL_MAGIC_coro PERL_MAGIC_ext 591 return 0;
592}
281 593
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 594static MGVTBL coro_cv_vtbl = {
595 0, 0, 0, 0,
596 coro_cv_free
597};
283 598
284/* the next two functions merely cache the padlists */ 599/* the next two functions merely cache the padlists */
285STATIC void 600ECB_INLINE void
286get_padlist (pTHX_ CV *cv) 601get_padlist (pTHX_ CV *cv)
287{ 602{
288 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 603 MAGIC *mg = CORO_MAGIC_cv (cv);
604 AV *av;
289 605
290 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 606 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
291 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 607 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292 else 608 else
609 {
610#if CORO_PREFER_PERL_FUNCTIONS
611 /* this is probably cleaner? but also slower! */
612 /* in practise, it seems to be less stable */
613 CV *cp = Perl_cv_clone (aTHX_ cv);
614 CvPADLIST (cv) = CvPADLIST (cp);
615 CvPADLIST (cp) = 0;
616 SvREFCNT_dec (cp);
617#else
293 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 618 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
619#endif
620 }
294} 621}
295 622
296STATIC void 623ECB_INLINE void
297put_padlist (pTHX_ CV *cv) 624put_padlist (pTHX_ CV *cv)
298{ 625{
299 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 626 MAGIC *mg = CORO_MAGIC_cv (cv);
627 AV *av;
300 628
301 if (!mg) 629 if (ecb_expect_false (!mg))
630 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
631
632 av = (AV *)mg->mg_obj;
633
634 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
635 av_extend (av, AvFILLp (av) + 1);
636
637 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
638}
639
640/** load & save, init *******************************************************/
641
642/* swap sv heads, at least logically */
643static void
644swap_svs (pTHX_ Coro__State c)
645{
646 int i;
647
648 for (i = 0; i <= AvFILLp (c->swap_sv); )
649 {
650 SV *a = AvARRAY (c->swap_sv)[i++];
651 SV *b = AvARRAY (c->swap_sv)[i++];
652
653 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
654 SV tmp;
655
656 /* swap sv_any */
657 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
658
659 /* swap sv_flags */
660 SvFLAGS (&tmp) = SvFLAGS (a);
661 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
662 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
663
664#if PERL_VERSION_ATLEAST (5,10,0)
665 /* perl 5.10 complicates this _quite_ a bit, but it also is
666 * much faster, so no quarrels here. alternatively, we could
667 * sv_upgrade to avoid this.
668 */
302 { 669 {
303 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 670 /* swap sv_u */
304 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 671 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
305 mg->mg_virtual = &vtbl_coro; 672
306 mg->mg_obj = (SV *)newAV (); 673 /* if SvANY points to the head, we need to adjust the pointers,
674 * as the pointer for a still points to b, and maybe vice versa.
675 */
676 #define svany_in_head(type) \
677 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
678
679 if (svany_in_head (SvTYPE (a)))
680 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
681
682 if (svany_in_head (SvTYPE (b)))
683 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
307 } 684 }
308 685#endif
309 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 686 }
310} 687}
311 688
312#define SB do { 689#define SWAP_SVS(coro) \
313#define SE } while (0) 690 if (ecb_expect_false ((coro)->swap_sv)) \
691 swap_svs (aTHX_ (coro))
314 692
315#define LOAD(state) load_state(aTHX_ (state));
316#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
319
320static void 693static void
694on_enterleave_call (pTHX_ SV *cb);
695
696static void
321load_state(pTHX_ Coro__State c) 697load_perl (pTHX_ Coro__State c)
322{ 698{
323 PL_dowarn = c->dowarn; 699 perl_slots *slot = c->slot;
324 PL_in_eval = c->in_eval; 700 c->slot = 0;
325 701
326 PL_curstackinfo = c->curstackinfo;
327 PL_curstack = c->curstack;
328 PL_mainstack = c->mainstack; 702 PL_mainstack = c->mainstack;
329 PL_stack_sp = c->stack_sp;
330 PL_op = c->op;
331 PL_curpad = c->curpad;
332 PL_comppad = c->comppad;
333 PL_compcv = c->compcv;
334 PL_stack_base = c->stack_base;
335 PL_stack_max = c->stack_max;
336 PL_tmps_stack = c->tmps_stack;
337 PL_tmps_floor = c->tmps_floor;
338 PL_tmps_ix = c->tmps_ix;
339 PL_tmps_max = c->tmps_max;
340 PL_markstack = c->markstack;
341 PL_markstack_ptr = c->markstack_ptr;
342 PL_markstack_max = c->markstack_max;
343 PL_scopestack = c->scopestack;
344 PL_scopestack_ix = c->scopestack_ix;
345 PL_scopestack_max = c->scopestack_max;
346 PL_savestack = c->savestack;
347 PL_savestack_ix = c->savestack_ix;
348 PL_savestack_max = c->savestack_max;
349 PL_retstack = c->retstack;
350 PL_retstack_ix = c->retstack_ix;
351 PL_retstack_max = c->retstack_max;
352 PL_curcop = c->curcop;
353 PL_top_env = c->top_env;
354 703
355 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 704#if CORO_JIT
356 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 705 load_perl_slots (slot);
357 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 706#else
707 #define VARx(name,expr,type) expr = slot->name;
708 # include "state.h"
709 #undef VARx
710#endif
358 711
359 { 712 {
360 dSP; 713 dSP;
714
361 CV *cv; 715 CV *cv;
362 716
363 /* now do the ugly restore mess */ 717 /* now do the ugly restore mess */
364 while ((cv = (CV *)POPs)) 718 while (ecb_expect_true (cv = (CV *)POPs))
365 { 719 {
366 AV *padlist = (AV *)POPs;
367
368 if (padlist)
369 {
370 put_padlist (aTHX_ cv); /* mark this padlist as available */ 720 put_padlist (aTHX_ cv); /* mark this padlist as available */
371 CvPADLIST(cv) = padlist; 721 CvDEPTH (cv) = PTR2IV (POPs);
372 } 722 CvPADLIST (cv) = (AV *)POPs;
373
374 ++CvDEPTH(cv);
375 } 723 }
376 724
377 PUTBACK; 725 PUTBACK;
378 } 726 }
379}
380 727
728 slf_frame = c->slf_frame;
729 CORO_THROW = c->except;
730
731 if (ecb_expect_false (enable_times))
732 {
733 if (ecb_expect_false (!times_valid))
734 coro_times_update ();
735
736 coro_times_sub (c);
737 }
738
739 if (ecb_expect_false (c->on_enter))
740 {
741 int i;
742
743 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
744 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
745 }
746
747 SWAP_SVS (c);
748}
749
381static void 750static void
382save_state(pTHX_ Coro__State c, int flags) 751save_perl (pTHX_ Coro__State c)
383{ 752{
753 SWAP_SVS (c);
754
755 if (ecb_expect_false (c->on_leave))
756 {
757 int i;
758
759 for (i = AvFILLp (c->on_leave); i >= 0; --i)
760 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
761 }
762
763 times_valid = 0;
764
765 if (ecb_expect_false (enable_times))
766 {
767 coro_times_update (); times_valid = 1;
768 coro_times_add (c);
769 }
770
771 c->except = CORO_THROW;
772 c->slf_frame = slf_frame;
773
384 { 774 {
385 dSP; 775 dSP;
386 I32 cxix = cxstack_ix; 776 I32 cxix = cxstack_ix;
387 PERL_CONTEXT *ccstk = cxstack; 777 PERL_CONTEXT *ccstk = cxstack;
388 PERL_SI *top_si = PL_curstackinfo; 778 PERL_SI *top_si = PL_curstackinfo;
… …
390 /* 780 /*
391 * the worst thing you can imagine happens first - we have to save 781 * the worst thing you can imagine happens first - we have to save
392 * (and reinitialize) all cv's in the whole callchain :( 782 * (and reinitialize) all cv's in the whole callchain :(
393 */ 783 */
394 784
395 PUSHs (Nullsv); 785 XPUSHs (Nullsv);
396 /* this loop was inspired by pp_caller */ 786 /* this loop was inspired by pp_caller */
397 for (;;) 787 for (;;)
398 { 788 {
399 while (cxix >= 0) 789 while (ecb_expect_true (cxix >= 0))
400 { 790 {
401 PERL_CONTEXT *cx = &ccstk[cxix--]; 791 PERL_CONTEXT *cx = &ccstk[cxix--];
402 792
403 if (CxTYPE(cx) == CXt_SUB) 793 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
404 { 794 {
405 CV *cv = cx->blk_sub.cv; 795 CV *cv = cx->blk_sub.cv;
796
406 if (CvDEPTH(cv)) 797 if (ecb_expect_true (CvDEPTH (cv)))
407 { 798 {
408 EXTEND (SP, CvDEPTH(cv)*2); 799 EXTEND (SP, 3);
409
410 while (--CvDEPTH(cv))
411 {
412 /* this tells the restore code to increment CvDEPTH */
413 PUSHs (Nullsv);
414 PUSHs ((SV *)cv);
415 }
416
417 PUSHs ((SV *)CvPADLIST(cv)); 800 PUSHs ((SV *)CvPADLIST (cv));
801 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 802 PUSHs ((SV *)cv);
419 803
804 CvDEPTH (cv) = 0;
420 get_padlist (aTHX_ cv); /* this is a monster */ 805 get_padlist (aTHX_ cv);
421 } 806 }
422 } 807 }
423#ifdef CXt_FORMAT
424 else if (CxTYPE(cx) == CXt_FORMAT)
425 {
426 /* I never used formats, so how should I know how these are implemented? */
427 /* my bold guess is as a simple, plain sub... */
428 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429 }
430#endif
431 } 808 }
432 809
433 if (top_si->si_type == PERLSI_MAIN) 810 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
434 break; 811 break;
435 812
436 top_si = top_si->si_prev; 813 top_si = top_si->si_prev;
437 ccstk = top_si->si_cxstack; 814 ccstk = top_si->si_cxstack;
438 cxix = top_si->si_cxix; 815 cxix = top_si->si_cxix;
439 } 816 }
440 817
441 PUTBACK; 818 PUTBACK;
442 } 819 }
443 820
444 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 821 /* allocate some space on the context stack for our purposes */
445 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 822 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
446 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 823 {
824 unsigned int i;
447 825
448 c->dowarn = PL_dowarn; 826 for (i = 0; i < SLOT_COUNT; ++i)
449 c->in_eval = PL_in_eval; 827 CXINC;
450 828
451 c->curstackinfo = PL_curstackinfo; 829 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 c->curstack = PL_curstack; 830 }
831
453 c->mainstack = PL_mainstack; 832 c->mainstack = PL_mainstack;
454 c->stack_sp = PL_stack_sp; 833
455 c->op = PL_op; 834 {
456 c->curpad = PL_curpad; 835 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
457 c->comppad = PL_comppad; 836
458 c->compcv = PL_compcv; 837#if CORO_JIT
459 c->stack_base = PL_stack_base; 838 save_perl_slots (slot);
460 c->stack_max = PL_stack_max; 839#else
461 c->tmps_stack = PL_tmps_stack; 840 #define VARx(name,expr,type) slot->name = expr;
462 c->tmps_floor = PL_tmps_floor; 841 # include "state.h"
463 c->tmps_ix = PL_tmps_ix; 842 #undef VARx
464 c->tmps_max = PL_tmps_max; 843#endif
465 c->markstack = PL_markstack; 844 }
466 c->markstack_ptr = PL_markstack_ptr;
467 c->markstack_max = PL_markstack_max;
468 c->scopestack = PL_scopestack;
469 c->scopestack_ix = PL_scopestack_ix;
470 c->scopestack_max = PL_scopestack_max;
471 c->savestack = PL_savestack;
472 c->savestack_ix = PL_savestack_ix;
473 c->savestack_max = PL_savestack_max;
474 c->retstack = PL_retstack;
475 c->retstack_ix = PL_retstack_ix;
476 c->retstack_max = PL_retstack_max;
477 c->curcop = PL_curcop;
478 c->top_env = PL_top_env;
479} 845}
480 846
481/* 847/*
482 * allocate various perl stacks. This is an exact copy 848 * allocate various perl stacks. This is almost an exact copy
483 * of perl.c:init_stacks, except that it uses less memory 849 * of perl.c:init_stacks, except that it uses less memory
484 * on the (sometimes correct) assumption that coroutines do 850 * on the (sometimes correct) assumption that coroutines do
485 * not usually need a lot of stackspace. 851 * not usually need a lot of stackspace.
486 */ 852 */
487STATIC void 853#if CORO_PREFER_PERL_FUNCTIONS
854# define coro_init_stacks(thx) init_stacks ()
855#else
856static void
488coro_init_stacks (pTHX) 857coro_init_stacks (pTHX)
489{ 858{
490 LOCK; 859 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
491
492 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493 PL_curstackinfo->si_type = PERLSI_MAIN; 860 PL_curstackinfo->si_type = PERLSI_MAIN;
494 PL_curstack = PL_curstackinfo->si_stack; 861 PL_curstack = PL_curstackinfo->si_stack;
495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 862 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496 863
497 PL_stack_base = AvARRAY(PL_curstack); 864 PL_stack_base = AvARRAY(PL_curstack);
498 PL_stack_sp = PL_stack_base; 865 PL_stack_sp = PL_stack_base;
499 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 866 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500 867
501 New(50,PL_tmps_stack,96,SV*); 868 New(50,PL_tmps_stack,32,SV*);
502 PL_tmps_floor = -1; 869 PL_tmps_floor = -1;
503 PL_tmps_ix = -1; 870 PL_tmps_ix = -1;
504 PL_tmps_max = 96; 871 PL_tmps_max = 32;
505 872
506 New(54,PL_markstack,16,I32); 873 New(54,PL_markstack,16,I32);
507 PL_markstack_ptr = PL_markstack; 874 PL_markstack_ptr = PL_markstack;
508 PL_markstack_max = PL_markstack + 16; 875 PL_markstack_max = PL_markstack + 16;
509 876
510#ifdef SET_MARK_OFFSET 877#ifdef SET_MARK_OFFSET
511 SET_MARK_OFFSET; 878 SET_MARK_OFFSET;
512#endif 879#endif
513 880
514 New(54,PL_scopestack,16,I32); 881 New(54,PL_scopestack,8,I32);
515 PL_scopestack_ix = 0; 882 PL_scopestack_ix = 0;
516 PL_scopestack_max = 16; 883 PL_scopestack_max = 8;
517 884
518 New(54,PL_savestack,96,ANY); 885 New(54,PL_savestack,24,ANY);
519 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
520 PL_savestack_max = 96; 887 PL_savestack_max = 24;
521 888
889#if !PERL_VERSION_ATLEAST (5,10,0)
522 New(54,PL_retstack,8,OP*); 890 New(54,PL_retstack,4,OP*);
523 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
524 PL_retstack_max = 8; 892 PL_retstack_max = 4;
525 893#endif
526 UNLOCK;
527} 894}
895#endif
528 896
529/* 897/*
530 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
531 */ 899 */
532STATIC void 900static void
533destroy_stacks(pTHX) 901coro_destruct_stacks (pTHX)
534{ 902{
535 if (!IN_DESTRUCT)
536 {
537 /* is this ugly, I ask? */
538 LEAVE_SCOPE (0);
539
540 /* sure it is, but more important: is it correct?? :/ */
541 FREETMPS;
542
543 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544 }
545
546 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
547 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
548 905
549 while (PL_curstackinfo) 906 while (PL_curstackinfo)
550 { 907 {
551 PERL_SI *p = PL_curstackinfo->si_prev; 908 PERL_SI *p = PL_curstackinfo->si_prev;
552 909
553 { /*D*//*remove*/
554 dSP;
555 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556 PUTBACK; /* possibly superfluous */
557 }
558
559 if (!IN_DESTRUCT) 910 if (!IN_DESTRUCT)
560 {
561 dounwind (-1);/*D*//*remove*/
562 SvREFCNT_dec (PL_curstackinfo->si_stack); 911 SvREFCNT_dec (PL_curstackinfo->si_stack);
563 }
564 912
565 Safefree (PL_curstackinfo->si_cxstack); 913 Safefree (PL_curstackinfo->si_cxstack);
566 Safefree (PL_curstackinfo); 914 Safefree (PL_curstackinfo);
567 PL_curstackinfo = p; 915 PL_curstackinfo = p;
568 } 916 }
569 917
570 Safefree (PL_tmps_stack); 918 Safefree (PL_tmps_stack);
571 Safefree (PL_markstack); 919 Safefree (PL_markstack);
572 Safefree (PL_scopestack); 920 Safefree (PL_scopestack);
573 Safefree (PL_savestack); 921 Safefree (PL_savestack);
922#if !PERL_VERSION_ATLEAST (5,10,0)
574 Safefree (PL_retstack); 923 Safefree (PL_retstack);
575}
576
577static void
578allocate_stack (Coro__State ctx, int alloc)
579{
580 coro_stack *stack;
581
582 New (0, stack, 1, coro_stack);
583
584 stack->refcnt = 1;
585 stack->usecnt = 1;
586 stack->gencnt = ctx->gencnt = 0;
587
588 if (alloc)
589 {
590#if HAVE_MMAP
591 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593 if (stack->sptr == (void *)-1)
594#endif 924#endif
925}
926
927#define CORO_RSS \
928 rss += sizeof (SYM (curstackinfo)); \
929 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
930 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
931 rss += SYM (tmps_max) * sizeof (SV *); \
932 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
933 rss += SYM (scopestack_max) * sizeof (I32); \
934 rss += SYM (savestack_max) * sizeof (ANY);
935
936static size_t
937coro_rss (pTHX_ struct coro *coro)
938{
939 size_t rss = sizeof (*coro);
940
941 if (coro->mainstack)
942 {
943 if (coro->flags & CF_RUNNING)
595 { 944 {
596 /*FIXME*//*D*//* reasonable stack size! */ 945 #define SYM(sym) PL_ ## sym
597 stack->ssize = - (8192 * sizeof (long)); 946 CORO_RSS;
598 New (0, stack->sptr, 8192, long); 947 #undef SYM
599 } 948 }
600 }
601 else 949 else
602 stack->sptr = 0;
603
604 ctx->stack = stack;
605}
606
607static void
608deallocate_stack (Coro__State ctx)
609{
610 coro_stack *stack = ctx->stack;
611
612 ctx->stack = 0;
613
614 if (stack)
615 {
616 if (!--stack->refcnt)
617 { 950 {
618#ifdef HAVE_MMAP 951 #define SYM(sym) coro->slot->sym
619 if (stack->ssize > 0 && stack->sptr) 952 CORO_RSS;
620 munmap (stack->sptr, stack->ssize); 953 #undef SYM
621 else 954 }
955 }
956
957 return rss;
958}
959
960/** coroutine stack handling ************************************************/
961
962static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
963static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
964static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
965
966/* apparently < 5.8.8 */
967#ifndef MgPV_nolen_const
968#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
969 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
970 (const char*)(mg)->mg_ptr)
622#endif 971#endif
623 Safefree (stack->sptr);
624 972
625 Safefree (stack); 973/*
974 * This overrides the default magic get method of %SIG elements.
975 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
976 * and instead of trying to save and restore the hash elements (extremely slow),
977 * we just provide our own readback here.
978 */
979static int ecb_cold
980coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
981{
982 const char *s = MgPV_nolen_const (mg);
983
984 if (*s == '_')
985 {
986 SV **svp = 0;
987
988 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
989 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
990
991 if (svp)
992 {
993 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
994 return 0;
626 } 995 }
627 else if (ctx->gencnt == stack->gencnt) 996 }
628 --stack->usecnt; 997
998 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
999}
1000
1001static int ecb_cold
1002coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1003{
1004 const char *s = MgPV_nolen_const (mg);
1005
1006 if (*s == '_')
629 } 1007 {
630} 1008 SV **svp = 0;
631 1009
1010 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1011 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1012
1013 if (svp)
1014 {
1015 SV *old = *svp;
1016 *svp = 0;
1017 SvREFCNT_dec (old);
1018 return 0;
1019 }
1020 }
1021
1022 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1023}
1024
1025static int ecb_cold
1026coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1027{
1028 const char *s = MgPV_nolen_const (mg);
1029
1030 if (*s == '_')
1031 {
1032 SV **svp = 0;
1033
1034 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1035 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1036
1037 if (svp)
1038 {
1039 SV *old = *svp;
1040 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1041 SvREFCNT_dec (old);
1042 return 0;
1043 }
1044 }
1045
1046 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1047}
1048
1049static void
1050prepare_nop (pTHX_ struct coro_transfer_args *ta)
1051{
1052 /* kind of mega-hacky, but works */
1053 ta->next = ta->prev = (struct coro *)ta;
1054}
1055
632static void 1056static int
633setup_coro (void *arg) 1057slf_check_nop (pTHX_ struct CoroSLF *frame)
1058{
1059 return 0;
1060}
1061
1062static int
1063slf_check_repeat (pTHX_ struct CoroSLF *frame)
1064{
1065 return 1;
1066}
1067
1068static UNOP init_perl_op;
1069
1070ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1071init_perl (pTHX_ struct coro *coro)
634{ 1072{
635 /* 1073 /*
636 * emulate part of the perl startup here. 1074 * emulate part of the perl startup here.
637 */ 1075 */
1076 coro_init_stacks (aTHX);
1077
1078 PL_runops = RUNOPS_DEFAULT;
1079 PL_curcop = &PL_compiling;
1080 PL_in_eval = EVAL_NULL;
1081 PL_comppad = 0;
1082 PL_comppad_name = 0;
1083 PL_comppad_name_fill = 0;
1084 PL_comppad_name_floor = 0;
1085 PL_curpm = 0;
1086 PL_curpad = 0;
1087 PL_localizing = 0;
1088 PL_restartop = 0;
1089#if PERL_VERSION_ATLEAST (5,10,0)
1090 PL_parser = 0;
1091#endif
1092 PL_hints = 0;
1093
1094 /* recreate the die/warn hooks */
1095 PL_diehook = SvREFCNT_inc (rv_diehook);
1096 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1097
1098 GvSV (PL_defgv) = newSV (0);
1099 GvAV (PL_defgv) = coro->args; coro->args = 0;
1100 GvSV (PL_errgv) = newSV (0);
1101 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1102 GvHV (PL_hintgv) = 0;
1103 PL_rs = newSVsv (GvSV (irsgv));
1104 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1105
1106 {
1107 dSP;
1108 UNOP myop;
1109
1110 Zero (&myop, 1, UNOP);
1111 myop.op_next = Nullop;
1112 myop.op_type = OP_ENTERSUB;
1113 myop.op_flags = OPf_WANT_VOID;
1114
1115 PUSHMARK (SP);
1116 PUSHs ((SV *)coro->startcv);
1117 PUTBACK;
1118 PL_op = (OP *)&myop;
1119 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1120 }
1121
1122 /* this newly created coroutine might be run on an existing cctx which most
1123 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1124 */
1125 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1126 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1127 slf_frame.destroy = 0;
1128
1129 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1130 init_perl_op.op_next = PL_op;
1131 init_perl_op.op_type = OP_ENTERSUB;
1132 init_perl_op.op_ppaddr = pp_slf;
1133 /* no flags etc. required, as an init function won't be called */
1134
1135 PL_op = (OP *)&init_perl_op;
1136
1137 /* copy throw, in case it was set before init_perl */
1138 CORO_THROW = coro->except;
1139
1140 SWAP_SVS (coro);
1141
1142 if (ecb_expect_false (enable_times))
1143 {
1144 coro_times_update ();
1145 coro_times_sub (coro);
1146 }
1147}
1148
1149static void
1150coro_unwind_stacks (pTHX)
1151{
1152 if (!IN_DESTRUCT)
1153 {
1154 /* restore all saved variables and stuff */
1155 LEAVE_SCOPE (0);
1156 assert (PL_tmps_floor == -1);
1157
1158 /* free all temporaries */
1159 FREETMPS;
1160 assert (PL_tmps_ix == -1);
1161
1162 /* unwind all extra stacks */
1163 POPSTACK_TO (PL_mainstack);
1164
1165 /* unwind main stack */
1166 dounwind (-1);
1167 }
1168}
1169
1170static void
1171destroy_perl (pTHX_ struct coro *coro)
1172{
1173 SV *svf [9];
1174
1175 {
1176 SV *old_current = SvRV (coro_current);
1177 struct coro *current = SvSTATE (old_current);
1178
1179 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1180
1181 save_perl (aTHX_ current);
1182
1183 /* this will cause transfer_check to croak on block*/
1184 SvRV_set (coro_current, (SV *)coro->hv);
1185
1186 load_perl (aTHX_ coro);
1187
1188 coro_unwind_stacks (aTHX);
1189
1190 /* restore swapped sv's */
1191 SWAP_SVS (coro);
1192
1193 coro_destruct_stacks (aTHX);
1194
1195 /* now save some sv's to be free'd later */
1196 svf [0] = GvSV (PL_defgv);
1197 svf [1] = (SV *)GvAV (PL_defgv);
1198 svf [2] = GvSV (PL_errgv);
1199 svf [3] = (SV *)PL_defoutgv;
1200 svf [4] = PL_rs;
1201 svf [5] = GvSV (irsgv);
1202 svf [6] = (SV *)GvHV (PL_hintgv);
1203 svf [7] = PL_diehook;
1204 svf [8] = PL_warnhook;
1205 assert (9 == sizeof (svf) / sizeof (*svf));
1206
1207 SvRV_set (coro_current, old_current);
1208
1209 load_perl (aTHX_ current);
1210 }
1211
1212 {
1213 unsigned int i;
1214
1215 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1216 SvREFCNT_dec (svf [i]);
1217
1218 SvREFCNT_dec (coro->saved_deffh);
1219 SvREFCNT_dec (coro->rouse_cb);
1220 SvREFCNT_dec (coro->invoke_cb);
1221 SvREFCNT_dec (coro->invoke_av);
1222 }
1223}
1224
1225ECB_INLINE void
1226free_coro_mortal (pTHX)
1227{
1228 if (ecb_expect_true (coro_mortal))
1229 {
1230 SvREFCNT_dec ((SV *)coro_mortal);
1231 coro_mortal = 0;
1232 }
1233}
1234
1235static int
1236runops_trace (pTHX)
1237{
1238 COP *oldcop = 0;
1239 int oldcxix = -2;
1240
1241 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1242 {
1243 PERL_ASYNC_CHECK ();
1244
1245 if (cctx_current->flags & CC_TRACE_ALL)
1246 {
1247 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1248 {
1249 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1250 SV **bot, **top;
1251 AV *av = newAV (); /* return values */
1252 SV **cb;
1253 dSP;
1254
1255 GV *gv = CvGV (cx->blk_sub.cv);
1256 SV *fullname = sv_2mortal (newSV (0));
1257 if (isGV (gv))
1258 gv_efullname3 (fullname, gv, 0);
1259
1260 bot = PL_stack_base + cx->blk_oldsp + 1;
1261 top = cx->blk_gimme == G_ARRAY ? SP + 1
1262 : cx->blk_gimme == G_SCALAR ? bot + 1
1263 : bot;
1264
1265 av_extend (av, top - bot);
1266 while (bot < top)
1267 av_push (av, SvREFCNT_inc_NN (*bot++));
1268
1269 PL_runops = RUNOPS_DEFAULT;
1270 ENTER;
1271 SAVETMPS;
1272 EXTEND (SP, 3);
1273 PUSHMARK (SP);
1274 PUSHs (&PL_sv_no);
1275 PUSHs (fullname);
1276 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1277 PUTBACK;
1278 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1279 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1280 SPAGAIN;
1281 FREETMPS;
1282 LEAVE;
1283 PL_runops = runops_trace;
1284 }
1285
1286 if (oldcop != PL_curcop)
1287 {
1288 oldcop = PL_curcop;
1289
1290 if (PL_curcop != &PL_compiling)
1291 {
1292 SV **cb;
1293
1294 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1295 {
1296 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1297
1298 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1299 {
1300 dSP;
1301 GV *gv = CvGV (cx->blk_sub.cv);
1302 SV *fullname = sv_2mortal (newSV (0));
1303
1304 if (isGV (gv))
1305 gv_efullname3 (fullname, gv, 0);
1306
1307 PL_runops = RUNOPS_DEFAULT;
1308 ENTER;
1309 SAVETMPS;
1310 EXTEND (SP, 3);
1311 PUSHMARK (SP);
1312 PUSHs (&PL_sv_yes);
1313 PUSHs (fullname);
1314 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1315 PUTBACK;
1316 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1317 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1318 SPAGAIN;
1319 FREETMPS;
1320 LEAVE;
1321 PL_runops = runops_trace;
1322 }
1323
1324 oldcxix = cxstack_ix;
1325 }
1326
1327 if (cctx_current->flags & CC_TRACE_LINE)
1328 {
1329 dSP;
1330
1331 PL_runops = RUNOPS_DEFAULT;
1332 ENTER;
1333 SAVETMPS;
1334 EXTEND (SP, 3);
1335 PL_runops = RUNOPS_DEFAULT;
1336 PUSHMARK (SP);
1337 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1338 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1339 PUTBACK;
1340 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1341 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1342 SPAGAIN;
1343 FREETMPS;
1344 LEAVE;
1345 PL_runops = runops_trace;
1346 }
1347 }
1348 }
1349 }
1350 }
1351
1352 TAINT_NOT;
1353 return 0;
1354}
1355
1356static struct CoroSLF cctx_ssl_frame;
1357
1358static void
1359slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1360{
1361 ta->prev = 0;
1362}
1363
1364static int
1365slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1366{
1367 *frame = cctx_ssl_frame;
1368
1369 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1370}
1371
1372/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1373static void ecb_noinline
1374cctx_prepare (pTHX)
1375{
1376 PL_top_env = &PL_start_env;
1377
1378 if (cctx_current->flags & CC_TRACE)
1379 PL_runops = runops_trace;
1380
1381 /* we already must be executing an SLF op, there is no other valid way
1382 * that can lead to creation of a new cctx */
1383 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1384 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1385
1386 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1387 cctx_ssl_frame = slf_frame;
1388
1389 slf_frame.prepare = slf_prepare_set_stacklevel;
1390 slf_frame.check = slf_check_set_stacklevel;
1391}
1392
1393/* the tail of transfer: execute stuff we can only do after a transfer */
1394ECB_INLINE void
1395transfer_tail (pTHX)
1396{
1397 free_coro_mortal (aTHX);
1398}
1399
1400/*
1401 * this is a _very_ stripped down perl interpreter ;)
1402 */
1403static void
1404cctx_run (void *arg)
1405{
1406#ifdef USE_ITHREADS
1407# if CORO_PTHREAD
1408 PERL_SET_CONTEXT (coro_thx);
1409# endif
1410#endif
1411 {
1412 dTHX;
1413
1414 /* normally we would need to skip the entersub here */
1415 /* not doing so will re-execute it, which is exactly what we want */
1416 /* PL_nop = PL_nop->op_next */
1417
1418 /* inject a fake subroutine call to cctx_init */
1419 cctx_prepare (aTHX);
1420
1421 /* cctx_run is the alternative tail of transfer() */
1422 transfer_tail (aTHX);
1423
1424 /* somebody or something will hit me for both perl_run and PL_restartop */
1425 PL_restartop = PL_op;
1426 perl_run (PL_curinterp);
1427 /*
1428 * Unfortunately, there is no way to get at the return values of the
1429 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1430 * runtime errors here, as this is just a random interpreter, not a thread.
1431 */
1432
1433 /*
1434 * If perl-run returns we assume exit() was being called or the coro
1435 * fell off the end, which seems to be the only valid (non-bug)
1436 * reason for perl_run to return. We try to exit by jumping to the
1437 * bootstrap-time "top" top_env, as we cannot restore the "main"
1438 * coroutine as Coro has no such concept.
1439 * This actually isn't valid with the pthread backend, but OSes requiring
1440 * that backend are too broken to do it in a standards-compliant way.
1441 */
1442 PL_top_env = main_top_env;
1443 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1444 }
1445}
1446
1447static coro_cctx *
1448cctx_new (void)
1449{
1450 coro_cctx *cctx;
1451
1452 ++cctx_count;
1453 New (0, cctx, 1, coro_cctx);
1454
1455 cctx->gen = cctx_gen;
1456 cctx->flags = 0;
1457 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1458
1459 return cctx;
1460}
1461
1462/* create a new cctx only suitable as source */
1463static coro_cctx *
1464cctx_new_empty (void)
1465{
1466 coro_cctx *cctx = cctx_new ();
1467
1468 cctx->sptr = 0;
1469 coro_create (&cctx->cctx, 0, 0, 0, 0);
1470
1471 return cctx;
1472}
1473
1474/* create a new cctx suitable as destination/running a perl interpreter */
1475static coro_cctx *
1476cctx_new_run (void)
1477{
1478 coro_cctx *cctx = cctx_new ();
1479 void *stack_start;
1480 size_t stack_size;
1481
1482#if HAVE_MMAP
1483 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1484 /* mmap supposedly does allocate-on-write for us */
1485 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
1486
1487 if (cctx->sptr != (void *)-1)
1488 {
1489 #if CORO_STACKGUARD
1490 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1491 #endif
1492 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1493 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1494 cctx->flags |= CC_MAPPED;
1495 }
1496 else
1497#endif
1498 {
1499 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1500 New (0, cctx->sptr, cctx_stacksize, long);
1501
1502 if (!cctx->sptr)
1503 {
1504 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1505 _exit (EXIT_FAILURE);
1506 }
1507
1508 stack_start = cctx->sptr;
1509 stack_size = cctx->ssize;
1510 }
1511
1512 #if CORO_USE_VALGRIND
1513 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1514 #endif
1515
1516 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1517
1518 return cctx;
1519}
1520
1521static void
1522cctx_destroy (coro_cctx *cctx)
1523{
1524 if (!cctx)
1525 return;
1526
1527 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1528
1529 --cctx_count;
1530 coro_destroy (&cctx->cctx);
1531
1532 /* coro_transfer creates new, empty cctx's */
1533 if (cctx->sptr)
1534 {
1535 #if CORO_USE_VALGRIND
1536 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1537 #endif
1538
1539#if HAVE_MMAP
1540 if (cctx->flags & CC_MAPPED)
1541 munmap (cctx->sptr, cctx->ssize);
1542 else
1543#endif
1544 Safefree (cctx->sptr);
1545 }
1546
1547 Safefree (cctx);
1548}
1549
1550/* wether this cctx should be destructed */
1551#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1552
1553static coro_cctx *
1554cctx_get (pTHX)
1555{
1556 while (ecb_expect_true (cctx_first))
1557 {
1558 coro_cctx *cctx = cctx_first;
1559 cctx_first = cctx->next;
1560 --cctx_idle;
1561
1562 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1563 return cctx;
1564
1565 cctx_destroy (cctx);
1566 }
1567
1568 return cctx_new_run ();
1569}
1570
1571static void
1572cctx_put (coro_cctx *cctx)
1573{
1574 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1575
1576 /* free another cctx if overlimit */
1577 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1578 {
1579 coro_cctx *first = cctx_first;
1580 cctx_first = first->next;
1581 --cctx_idle;
1582
1583 cctx_destroy (first);
1584 }
1585
1586 ++cctx_idle;
1587 cctx->next = cctx_first;
1588 cctx_first = cctx;
1589}
1590
1591/** coroutine switching *****************************************************/
1592
1593static void
1594transfer_check (pTHX_ struct coro *prev, struct coro *next)
1595{
1596 /* TODO: throwing up here is considered harmful */
1597
1598 if (ecb_expect_true (prev != next))
1599 {
1600 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1601 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1602
1603 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1604 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1605
1606#if !PERL_VERSION_ATLEAST (5,10,0)
1607 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1608 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1609#endif
1610 }
1611}
1612
1613/* always use the TRANSFER macro */
1614static void ecb_noinline /* noinline so we have a fixed stackframe */
1615transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1616{
1617 dSTACKLEVEL;
1618
1619 /* sometimes transfer is only called to set idle_sp */
1620 if (ecb_expect_false (!prev))
1621 {
1622 cctx_current->idle_sp = STACKLEVEL;
1623 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1624 }
1625 else if (ecb_expect_true (prev != next))
1626 {
1627 coro_cctx *cctx_prev;
1628
1629 if (ecb_expect_false (prev->flags & CF_NEW))
1630 {
1631 /* create a new empty/source context */
1632 prev->flags &= ~CF_NEW;
1633 prev->flags |= CF_RUNNING;
1634 }
1635
1636 prev->flags &= ~CF_RUNNING;
1637 next->flags |= CF_RUNNING;
1638
1639 /* first get rid of the old state */
1640 save_perl (aTHX_ prev);
1641
1642 if (ecb_expect_false (next->flags & CF_NEW))
1643 {
1644 /* need to start coroutine */
1645 next->flags &= ~CF_NEW;
1646 /* setup coroutine call */
1647 init_perl (aTHX_ next);
1648 }
1649 else
1650 load_perl (aTHX_ next);
1651
1652 /* possibly untie and reuse the cctx */
1653 if (ecb_expect_true (
1654 cctx_current->idle_sp == STACKLEVEL
1655 && !(cctx_current->flags & CC_TRACE)
1656 && !force_cctx
1657 ))
1658 {
1659 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1660 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1661
1662 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1663 /* without this the next cctx_get might destroy the running cctx while still in use */
1664 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1665 if (ecb_expect_true (!next->cctx))
1666 next->cctx = cctx_get (aTHX);
1667
1668 cctx_put (cctx_current);
1669 }
1670 else
1671 prev->cctx = cctx_current;
1672
1673 ++next->usecount;
1674
1675 cctx_prev = cctx_current;
1676 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1677
1678 next->cctx = 0;
1679
1680 if (ecb_expect_false (cctx_prev != cctx_current))
1681 {
1682 cctx_prev->top_env = PL_top_env;
1683 PL_top_env = cctx_current->top_env;
1684 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1685 }
1686
1687 transfer_tail (aTHX);
1688 }
1689}
1690
1691#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1692#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1693
1694/** high level stuff ********************************************************/
1695
1696/* this function is actually Coro, not Coro::State, but we call it from here */
1697/* because it is convenient - but it hasn't been declared yet for that reason */
1698static void
1699coro_call_on_destroy (pTHX_ struct coro *coro);
1700
1701static void
1702coro_state_destroy (pTHX_ struct coro *coro)
1703{
1704 if (coro->flags & CF_ZOMBIE)
1705 return;
1706
1707 slf_destroy (aTHX_ coro);
1708
1709 coro->flags |= CF_ZOMBIE;
1710
1711 if (coro->flags & CF_READY)
1712 {
1713 /* reduce nready, as destroying a ready coro effectively unreadies it */
1714 /* alternative: look through all ready queues and remove the coro */
1715 --coro_nready;
1716 }
1717 else
1718 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1719
1720 if (coro->next) coro->next->prev = coro->prev;
1721 if (coro->prev) coro->prev->next = coro->next;
1722 if (coro == coro_first) coro_first = coro->next;
1723
1724 if (coro->mainstack
1725 && coro->mainstack != main_mainstack
1726 && coro->slot
1727 && !PL_dirty)
1728 destroy_perl (aTHX_ coro);
1729
1730 cctx_destroy (coro->cctx);
1731 SvREFCNT_dec (coro->startcv);
1732 SvREFCNT_dec (coro->args);
1733 SvREFCNT_dec (coro->swap_sv);
1734 SvREFCNT_dec (CORO_THROW);
1735
1736 coro_call_on_destroy (aTHX_ coro);
1737
1738 /* more destruction mayhem in coro_state_free */
1739}
1740
1741static int
1742coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1743{
1744 struct coro *coro = (struct coro *)mg->mg_ptr;
1745 mg->mg_ptr = 0;
1746
1747 coro_state_destroy (aTHX_ coro);
1748 SvREFCNT_dec (coro->on_destroy);
1749 SvREFCNT_dec (coro->status);
1750
1751 Safefree (coro);
1752
1753 return 0;
1754}
1755
1756static int ecb_cold
1757coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1758{
1759 /* called when perl clones the current process the slow way (windows process emulation) */
1760 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1761 mg->mg_ptr = 0;
1762 mg->mg_virtual = 0;
1763
1764 return 0;
1765}
1766
1767static MGVTBL coro_state_vtbl = {
1768 0, 0, 0, 0,
1769 coro_state_free,
1770 0,
1771#ifdef MGf_DUP
1772 coro_state_dup,
1773#else
1774# define MGf_DUP 0
1775#endif
1776};
1777
1778static void
1779prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1780{
1781 ta->prev = SvSTATE (prev_sv);
1782 ta->next = SvSTATE (next_sv);
1783 TRANSFER_CHECK (*ta);
1784}
1785
1786static void
1787api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1788{
1789 struct coro_transfer_args ta;
1790
1791 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1792 TRANSFER (ta, 1);
1793}
1794
1795/** Coro ********************************************************************/
1796
1797ECB_INLINE void
1798coro_enq (pTHX_ struct coro *coro)
1799{
1800 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1801
1802 SvREFCNT_inc_NN (coro->hv);
1803
1804 coro->next_ready = 0;
1805 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1806 ready [1] = coro;
1807}
1808
1809ECB_INLINE struct coro *
1810coro_deq (pTHX)
1811{
1812 int prio;
1813
1814 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1815 {
1816 struct coro **ready = coro_ready [prio];
1817
1818 if (ready [0])
1819 {
1820 struct coro *coro = ready [0];
1821 ready [0] = coro->next_ready;
1822 return coro;
1823 }
1824 }
1825
1826 return 0;
1827}
1828
1829static void
1830invoke_sv_ready_hook_helper (void)
1831{
638 dTHX; 1832 dTHX;
639 dSP; 1833 dSP;
640 Coro__State ctx = (Coro__State)arg;
641 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642 1834
643 coro_init_stacks (aTHX); 1835 ENTER;
644 /*PL_curcop = 0;*/ 1836 SAVETMPS;
645 /*PL_in_eval = PL_in_eval;*/ /* inherit */
646 SvREFCNT_dec (GvAV (PL_defgv));
647 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648 1837
649 SPAGAIN;
650
651 if (ctx->stack)
652 {
653 ctx->cursp = 0;
654
655 PUSHMARK(SP); 1838 PUSHMARK (SP);
656 PUTBACK; 1839 PUTBACK;
657 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1840 call_sv (coro_readyhook, G_VOID | G_DISCARD);
658 1841
659 if (SvTRUE (ERRSV)) 1842 FREETMPS;
660 croak (NULL); 1843 LEAVE;
661 else 1844}
662 croak ("FATAL: CCTXT coroutine returned!"); 1845
1846static int
1847api_ready (pTHX_ SV *coro_sv)
1848{
1849 struct coro *coro = SvSTATE (coro_sv);
1850
1851 if (coro->flags & CF_READY)
1852 return 0;
1853
1854 coro->flags |= CF_READY;
1855
1856 coro_enq (aTHX_ coro);
1857
1858 if (!coro_nready++)
1859 if (coroapi.readyhook)
1860 coroapi.readyhook ();
1861
1862 return 1;
1863}
1864
1865static int
1866api_is_ready (pTHX_ SV *coro_sv)
1867{
1868 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1869}
1870
1871/* expects to own a reference to next->hv */
1872ECB_INLINE void
1873prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1874{
1875 SV *prev_sv = SvRV (coro_current);
1876
1877 ta->prev = SvSTATE_hv (prev_sv);
1878 ta->next = next;
1879
1880 TRANSFER_CHECK (*ta);
1881
1882 SvRV_set (coro_current, (SV *)next->hv);
1883
1884 free_coro_mortal (aTHX);
1885 coro_mortal = prev_sv;
1886}
1887
1888static void
1889prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1890{
1891 for (;;)
663 } 1892 {
664 else 1893 struct coro *next = coro_deq (aTHX);
665 {
666 UNOP myop;
667 1894
668 PL_op = (OP *)&myop; 1895 if (ecb_expect_true (next))
669
670 Zero(&myop, 1, UNOP);
671 myop.op_next = Nullop;
672 myop.op_flags = OPf_WANT_VOID;
673
674 PUSHMARK(SP);
675 XPUSHs (sub_init);
676 /*
677 * the next line is slightly wrong, as PL_op->op_next
678 * is actually being executed so we skip the first op.
679 * that doesn't matter, though, since it is only
680 * pp_nextstate and we never return...
681 * ah yes, and I don't care anyways ;)
682 */
683 PUTBACK;
684 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685 SPAGAIN;
686
687 ENTER; /* necessary e.g. for dounwind */
688 }
689}
690
691static void
692continue_coro (void *arg)
693{
694 /*
695 * this is a _very_ stripped down perl interpreter ;)
696 */
697 dTHX;
698 Coro__State ctx = (Coro__State)arg;
699 JMPENV coro_start_env;
700
701 PL_top_env = &ctx->start_env;
702
703 ctx->cursp = 0;
704 PL_op = PL_op->op_next;
705 CALLRUNOPS(aTHX);
706
707 abort ();
708}
709
710STATIC void
711transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712{
713 dSTACKLEVEL;
714
715 if (prev != next)
716 {
717 if (next->mainstack)
718 { 1896 {
719 LOCK; 1897 /* cannot transfer to destroyed coros, skip and look for next */
720 SAVE (prev, flags); 1898 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
721 LOAD (next); 1899 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
722 UNLOCK; 1900 else
723
724 /* mark this state as in-use */
725 next->mainstack = 0;
726 next->tmps_ix = -2;
727
728 /* stacklevel changed? if yes, grab the stack for us! */
729 if (flags & TRANSFER_SAVE_CCTXT)
730 { 1901 {
731 if (!prev->stack) 1902 next->flags &= ~CF_READY;
732 allocate_stack (prev, 0); 1903 --coro_nready;
733 else if (prev->cursp != stacklevel 1904
734 && prev->stack->usecnt > 1) 1905 prepare_schedule_to (aTHX_ ta, next);
735 { 1906 break;
736 prev->gencnt = ++prev->stack->gencnt;
737 prev->stack->usecnt = 1;
738 }
739
740 /* has our stack been invalidated? */
741 if (next->stack && next->stack->gencnt != next->gencnt)
742 {
743 deallocate_stack (next);
744 allocate_stack (next, 1);
745 coro_create (&(next->stack->cctx),
746 continue_coro, (void *)next,
747 next->stack->sptr, labs (next->stack->ssize));
748 }
749
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 } 1907 }
754 else
755 next->cursp = stacklevel;
756 } 1908 }
757 else if (next->tmps_ix == -2)
758 croak ("tried to transfer to running coroutine");
759 else 1909 else
760 { 1910 {
761 LOCK; 1911 /* nothing to schedule: call the idle handler */
762 SAVE (prev, -1); /* first get rid of the old state */ 1912 if (SvROK (sv_idle)
763 UNLOCK; 1913 && SvOBJECT (SvRV (sv_idle)))
764
765 if (flags & TRANSFER_SAVE_CCTXT)
766 { 1914 {
767 if (!prev->stack) 1915 if (SvRV (sv_idle) == SvRV (coro_current))
768 allocate_stack (prev, 0); 1916 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
769 1917
770 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1918 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
771 { 1919 api_ready (aTHX_ SvRV (sv_idle));
772 PL_top_env = &next->start_env; 1920 --coro_nready;
773
774 setup_coro (next);
775 next->cursp = stacklevel;
776
777 prev->stack->refcnt++;
778 prev->stack->usecnt++;
779 next->stack = prev->stack;
780 next->gencnt = prev->gencnt;
781 }
782 else
783 {
784 assert (!next->stack);
785 allocate_stack (next, 1);
786 coro_create (&(next->stack->cctx),
787 setup_coro, (void *)next,
788 next->stack->sptr, labs (next->stack->ssize));
789 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790 prev->cursp = stacklevel;
791 /* don't add any code here */
792 }
793 } 1921 }
794 else 1922 else
795 { 1923 {
796 setup_coro (next); 1924 /* TODO: deprecated, remove, cannot work reliably *//*D*/
797 next->cursp = stacklevel; 1925 dSP;
1926
1927 ENTER;
1928 SAVETMPS;
1929
1930 PUSHMARK (SP);
1931 PUTBACK;
1932 call_sv (sv_idle, G_VOID | G_DISCARD);
1933
1934 FREETMPS;
1935 LEAVE;
798 } 1936 }
799 } 1937 }
800 } 1938 }
1939}
801 1940
802 LOCK; 1941ECB_INLINE void
1942prepare_cede (pTHX_ struct coro_transfer_args *ta)
1943{
1944 api_ready (aTHX_ coro_current);
1945 prepare_schedule (aTHX_ ta);
1946}
1947
1948ECB_INLINE void
1949prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1950{
1951 SV *prev = SvRV (coro_current);
1952
803 if (coro_mortal) 1953 if (coro_nready)
804 {
805 SvREFCNT_dec (coro_mortal);
806 coro_mortal = 0;
807 } 1954 {
808 UNLOCK; 1955 prepare_schedule (aTHX_ ta);
809} 1956 api_ready (aTHX_ prev);
810
811#define SV_CORO(sv,func) \
812 do { \
813 if (SvROK (sv)) \
814 sv = SvRV (sv); \
815 \
816 if (SvTYPE (sv) == SVt_PVHV) \
817 { \
818 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819 \
820 if (!he) \
821 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822 \
823 (sv) = SvRV (HeVAL(he)); \
824 } \
825 \
826 /* must also be changed inside Coro::Cont::yield */ \
827 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829 \
830 } while(0)
831
832#define SvSTATE(sv) (struct coro *)SvIV (sv)
833
834static void
835api_transfer(pTHX_ SV *prev, SV *next, int flags)
836{
837 SV_CORO (prev, "Coro::transfer");
838 SV_CORO (next, "Coro::transfer");
839
840 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
841}
842
843/** Coro ********************************************************************/
844
845#define PRIO_MAX 3
846#define PRIO_HIGH 1
847#define PRIO_NORMAL 0
848#define PRIO_LOW -1
849#define PRIO_IDLE -3
850#define PRIO_MIN -4
851
852/* for Coro.pm */
853static GV *coro_current, *coro_idle;
854static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855static int coro_nready;
856
857static void
858coro_enq (pTHX_ SV *sv)
859{
860 if (SvTYPE (sv) == SVt_PVHV)
861 { 1957 }
862 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1958 else
863 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1959 prepare_nop (aTHX_ ta);
1960}
864 1961
865 prio = prio > PRIO_MAX ? PRIO_MAX 1962static void
866 : prio < PRIO_MIN ? PRIO_MIN 1963api_schedule (pTHX)
867 : prio; 1964{
1965 struct coro_transfer_args ta;
868 1966
869 av_push (coro_ready [prio - PRIO_MIN], sv); 1967 prepare_schedule (aTHX_ &ta);
870 coro_nready++; 1968 TRANSFER (ta, 1);
1969}
871 1970
1971static void
1972api_schedule_to (pTHX_ SV *coro_sv)
1973{
1974 struct coro_transfer_args ta;
1975 struct coro *next = SvSTATE (coro_sv);
1976
1977 SvREFCNT_inc_NN (coro_sv);
1978 prepare_schedule_to (aTHX_ &ta, next);
1979}
1980
1981static int
1982api_cede (pTHX)
1983{
1984 struct coro_transfer_args ta;
1985
1986 prepare_cede (aTHX_ &ta);
1987
1988 if (ecb_expect_true (ta.prev != ta.next))
1989 {
1990 TRANSFER (ta, 1);
872 return; 1991 return 1;
1992 }
1993 else
1994 return 0;
1995}
1996
1997static int
1998api_cede_notself (pTHX)
1999{
2000 if (coro_nready)
2001 {
2002 struct coro_transfer_args ta;
2003
2004 prepare_cede_notself (aTHX_ &ta);
2005 TRANSFER (ta, 1);
2006 return 1;
2007 }
2008 else
2009 return 0;
2010}
2011
2012static void
2013api_trace (pTHX_ SV *coro_sv, int flags)
2014{
2015 struct coro *coro = SvSTATE (coro_sv);
2016
2017 if (coro->flags & CF_RUNNING)
2018 croak ("cannot enable tracing on a running coroutine, caught");
2019
2020 if (flags & CC_TRACE)
2021 {
2022 if (!coro->cctx)
2023 coro->cctx = cctx_new_run ();
2024 else if (!(coro->cctx->flags & CC_TRACE))
2025 croak ("cannot enable tracing on coroutine with custom stack, caught");
2026
2027 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2028 }
2029 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2030 {
2031 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2032
2033 if (coro->flags & CF_RUNNING)
2034 PL_runops = RUNOPS_DEFAULT;
2035 else
2036 coro->slot->runops = RUNOPS_DEFAULT;
2037 }
2038}
2039
2040static void
2041coro_push_av (pTHX_ AV *av, I32 gimme_v)
2042{
2043 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2044 {
2045 dSP;
2046
2047 if (gimme_v == G_SCALAR)
2048 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2049 else
2050 {
2051 int i;
2052 EXTEND (SP, AvFILLp (av) + 1);
2053
2054 for (i = 0; i <= AvFILLp (av); ++i)
2055 PUSHs (AvARRAY (av)[i]);
2056 }
2057
2058 PUTBACK;
2059 }
2060}
2061
2062static void
2063coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2064{
2065 if (!coro->on_destroy)
2066 coro->on_destroy = newAV ();
2067
2068 av_push (coro->on_destroy, cb);
2069}
2070
2071static void
2072slf_destroy_join (pTHX_ struct CoroSLF *frame)
2073{
2074 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2075}
2076
2077static int
2078slf_check_join (pTHX_ struct CoroSLF *frame)
2079{
2080 struct coro *coro = (struct coro *)frame->data;
2081
2082 if (!coro->status)
2083 return 1;
2084
2085 frame->destroy = 0;
2086
2087 coro_push_av (aTHX_ coro->status, GIMME_V);
2088
2089 SvREFCNT_dec ((SV *)coro->hv);
2090
2091 return 0;
2092}
2093
2094static void
2095slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2098
2099 if (items > 1)
2100 croak ("join called with too many arguments");
2101
2102 if (coro->status)
2103 frame->prepare = prepare_nop;
2104 else
2105 {
2106 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2107 frame->prepare = prepare_schedule;
2108 }
2109
2110 frame->check = slf_check_join;
2111 frame->destroy = slf_destroy_join;
2112 frame->data = (void *)coro;
2113 SvREFCNT_inc (coro->hv);
2114}
2115
2116static void
2117coro_call_on_destroy (pTHX_ struct coro *coro)
2118{
2119 AV *od = coro->on_destroy;
2120
2121 if (!od)
2122 return;
2123
2124 while (AvFILLp (od) >= 0)
2125 {
2126 SV *cb = sv_2mortal (av_pop (od));
2127
2128 /* coro hv's (and only hv's at the moment) are supported as well */
2129 if (SvSTATEhv_p (aTHX_ cb))
2130 api_ready (aTHX_ cb);
2131 else
2132 {
2133 dSP; /* don't disturb outer sp */
2134 PUSHMARK (SP);
2135
2136 if (coro->status)
2137 {
2138 PUTBACK;
2139 coro_push_av (aTHX_ coro->status, G_ARRAY);
2140 SPAGAIN;
2141 }
2142
2143 PUTBACK;
2144 call_sv (cb, G_VOID | G_DISCARD);
2145 }
2146 }
2147}
2148
2149static void
2150coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2151{
2152 AV *av;
2153
2154 if (coro->status)
2155 {
2156 av = coro->status;
2157 av_clear (av);
2158 }
2159 else
2160 av = coro->status = newAV ();
2161
2162 /* items are actually not so common, so optimise for this case */
2163 if (items)
2164 {
2165 int i;
2166
2167 av_extend (av, items - 1);
2168
2169 for (i = 0; i < items; ++i)
2170 av_push (av, SvREFCNT_inc_NN (arg [i]));
2171 }
2172}
2173
2174static void
2175slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2176{
2177 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2178 api_ready (aTHX_ sv_manager);
2179
2180 frame->prepare = prepare_schedule;
2181 frame->check = slf_check_repeat;
2182
2183 /* as a minor optimisation, we could unwind all stacks here */
2184 /* but that puts extra pressure on pp_slf, and is not worth much */
2185 /*coro_unwind_stacks (aTHX);*/
2186}
2187
2188static void
2189slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 HV *coro_hv = (HV *)SvRV (coro_current);
2192
2193 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2194 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2195}
2196
2197static void
2198slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2199{
2200 HV *coro_hv;
2201 struct coro *coro;
2202
2203 if (items <= 0)
2204 croak ("Coro::cancel called without coro object,");
2205
2206 coro = SvSTATE (arg [0]);
2207 coro_hv = coro->hv;
2208
2209 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2210
2211 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2212 {
2213 /* coro currently busy cancelling something, so just notify it */
2214 coro->slf_frame.data = (void *)coro;
2215
2216 frame->prepare = prepare_nop;
2217 frame->check = slf_check_nop;
2218 }
2219 else if (coro_hv == (HV *)SvRV (coro_current))
2220 {
2221 /* cancelling the current coro is allowed, and equals terminate */
2222 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2223 }
2224 else
2225 {
2226 struct coro *self = SvSTATE_current;
2227
2228 /* otherwise we cancel directly, purely for speed reasons
2229 * unfortunately, this requires some magic trickery, as
2230 * somebody else could cancel us, so we have to fight the cancellation.
2231 * this is ugly, and hopefully fully worth the extra speed.
2232 * besides, I can't get the slow-but-safe version working...
2233 */
2234 slf_frame.data = 0;
2235 self->flags |= CF_NOCANCEL;
2236 coro_state_destroy (aTHX_ coro);
2237 self->flags &= ~CF_NOCANCEL;
2238
2239 if (slf_frame.data)
2240 {
2241 /* while we were busy we have been cancelled, so terminate */
2242 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2243 }
2244 else
2245 {
2246 frame->prepare = prepare_nop;
2247 frame->check = slf_check_nop;
2248 }
2249 }
2250}
2251
2252static int
2253slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2254{
2255 frame->prepare = 0;
2256 coro_unwind_stacks (aTHX);
2257
2258 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2259
2260 return 1;
2261}
2262
2263static int
2264safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2265{
2266 if (coro->cctx)
2267 croak ("coro inside C callback, unable to cancel at this time, caught");
2268
2269 if (coro->flags & CF_NEW)
2270 {
2271 coro_set_status (aTHX_ coro, arg, items);
2272 coro_state_destroy (aTHX_ coro);
2273 }
2274 else
2275 {
2276 if (!coro->slf_frame.prepare)
2277 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2278
2279 slf_destroy (aTHX_ coro);
2280
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro->slf_frame.prepare = prepare_nop;
2283 coro->slf_frame.check = slf_check_safe_cancel;
2284
2285 api_ready (aTHX_ (SV *)coro->hv);
2286 }
2287
2288 return 1;
2289}
2290
2291/*****************************************************************************/
2292/* async pool handler */
2293
2294static int
2295slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2296{
2297 HV *hv = (HV *)SvRV (coro_current);
2298 struct coro *coro = (struct coro *)frame->data;
2299
2300 if (!coro->invoke_cb)
2301 return 1; /* loop till we have invoke */
2302 else
2303 {
2304 hv_store (hv, "desc", sizeof ("desc") - 1,
2305 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2306
2307 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2308
2309 {
2310 dSP;
2311 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2312 PUTBACK;
873 } 2313 }
874 2314
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2315 SvREFCNT_dec (GvAV (PL_defgv));
2316 GvAV (PL_defgv) = coro->invoke_av;
2317 coro->invoke_av = 0;
2318
2319 return 0;
2320 }
2321}
2322
2323static void
2324slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = SvSTATE_hv ((SV *)hv);
2328
2329 if (ecb_expect_true (coro->saved_deffh))
2330 {
2331 /* subsequent iteration */
2332 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2333 coro->saved_deffh = 0;
2334
2335 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2336 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2337 {
2338 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2339 return;
2340 }
2341 else
2342 {
2343 av_clear (GvAV (PL_defgv));
2344 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2345
2346 coro->prio = 0;
2347
2348 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2349 api_trace (aTHX_ coro_current, 0);
2350
2351 frame->prepare = prepare_schedule;
2352 av_push (av_async_pool, SvREFCNT_inc (hv));
2353 }
2354 }
2355 else
2356 {
2357 /* first iteration, simply fall through */
2358 frame->prepare = prepare_nop;
2359 }
2360
2361 frame->check = slf_check_pool_handler;
2362 frame->data = (void *)coro;
2363}
2364
2365/*****************************************************************************/
2366/* rouse callback */
2367
2368#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2369
2370static void
2371coro_rouse_callback (pTHX_ CV *cv)
2372{
2373 dXSARGS;
2374 SV *data = (SV *)S_GENSUB_ARG;
2375
2376 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2377 {
2378 /* first call, set args */
2379 SV *coro = SvRV (data);
2380 AV *av = newAV ();
2381
2382 SvRV_set (data, (SV *)av);
2383
2384 /* better take a full copy of the arguments */
2385 while (items--)
2386 av_store (av, items, newSVsv (ST (items)));
2387
2388 api_ready (aTHX_ coro);
2389 SvREFCNT_dec (coro);
2390 }
2391
2392 XSRETURN_EMPTY;
2393}
2394
2395static int
2396slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2397{
2398 SV *data = (SV *)frame->data;
2399
2400 if (CORO_THROW)
2401 return 0;
2402
2403 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2404 return 1;
2405
2406 /* now push all results on the stack */
2407 {
2408 dSP;
2409 AV *av = (AV *)SvRV (data);
2410 int i;
2411
2412 EXTEND (SP, AvFILLp (av) + 1);
2413 for (i = 0; i <= AvFILLp (av); ++i)
2414 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2415
2416 /* we have stolen the elements, so set length to zero and free */
2417 AvFILLp (av) = -1;
2418 av_undef (av);
2419
2420 PUTBACK;
2421 }
2422
2423 return 0;
2424}
2425
2426static void
2427slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2428{
2429 SV *cb;
2430
2431 if (items)
2432 cb = arg [0];
2433 else
2434 {
2435 struct coro *coro = SvSTATE_current;
2436
2437 if (!coro->rouse_cb)
2438 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2439
2440 cb = sv_2mortal (coro->rouse_cb);
2441 coro->rouse_cb = 0;
2442 }
2443
2444 if (!SvROK (cb)
2445 || SvTYPE (SvRV (cb)) != SVt_PVCV
2446 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2447 croak ("Coro::rouse_wait called with illegal callback argument,");
2448
2449 {
2450 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2451 SV *data = (SV *)S_GENSUB_ARG;
2452
2453 frame->data = (void *)data;
2454 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2455 frame->check = slf_check_rouse_wait;
2456 }
876} 2457}
877 2458
878static SV * 2459static SV *
879coro_deq (pTHX_ int min_prio) 2460coro_new_rouse_cb (pTHX)
880{ 2461{
881 int prio = PRIO_MAX - PRIO_MIN; 2462 HV *hv = (HV *)SvRV (coro_current);
2463 struct coro *coro = SvSTATE_hv (hv);
2464 SV *data = newRV_inc ((SV *)hv);
2465 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
882 2466
883 min_prio -= PRIO_MIN; 2467 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
884 if (min_prio < 0) 2468 SvREFCNT_dec (data); /* magicext increases the refcount */
885 min_prio = 0;
886 2469
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2470 SvREFCNT_dec (coro->rouse_cb);
888 if (av_len (coro_ready[prio]) >= 0) 2471 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2472
2473 return cb;
2474}
2475
2476/*****************************************************************************/
2477/* schedule-like-function opcode (SLF) */
2478
2479static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2480static const CV *slf_cv;
2481static SV **slf_argv;
2482static int slf_argc, slf_arga; /* count, allocated */
2483static I32 slf_ax; /* top of stack, for restore */
2484
2485/* this restores the stack in the case we patched the entersub, to */
2486/* recreate the stack frame as perl will on following calls */
2487/* since entersub cleared the stack */
2488static OP *
2489pp_restore (pTHX)
2490{
2491 int i;
2492 SV **SP = PL_stack_base + slf_ax;
2493
2494 PUSHMARK (SP);
2495
2496 EXTEND (SP, slf_argc + 1);
2497
2498 for (i = 0; i < slf_argc; ++i)
2499 PUSHs (sv_2mortal (slf_argv [i]));
2500
2501 PUSHs ((SV *)CvGV (slf_cv));
2502
2503 RETURNOP (slf_restore.op_first);
2504}
2505
2506static void
2507slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2508{
2509 SV **arg = (SV **)slf_frame.data;
2510
2511 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2512}
2513
2514static void
2515slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2516{
2517 if (items != 2)
2518 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2519
2520 frame->prepare = slf_prepare_transfer;
2521 frame->check = slf_check_nop;
2522 frame->data = (void *)arg; /* let's hope it will stay valid */
2523}
2524
2525static void
2526slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2527{
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_nop;
2530}
2531
2532static void
2533slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2534{
2535 struct coro *next = (struct coro *)slf_frame.data;
2536
2537 SvREFCNT_inc_NN (next->hv);
2538 prepare_schedule_to (aTHX_ ta, next);
2539}
2540
2541static void
2542slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2543{
2544 if (!items)
2545 croak ("Coro::schedule_to expects a coroutine argument, caught");
2546
2547 frame->data = (void *)SvSTATE (arg [0]);
2548 frame->prepare = slf_prepare_schedule_to;
2549 frame->check = slf_check_nop;
2550}
2551
2552static void
2553slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2554{
2555 api_ready (aTHX_ SvRV (coro_current));
2556
2557 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2558}
2559
2560static void
2561slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 frame->prepare = prepare_cede;
2564 frame->check = slf_check_nop;
2565}
2566
2567static void
2568slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2569{
2570 frame->prepare = prepare_cede_notself;
2571 frame->check = slf_check_nop;
2572}
2573
2574/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2575static void
2576slf_destroy (pTHX_ struct coro *coro)
2577{
2578 /* this callback is reserved for slf functions needing to do cleanup */
2579 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2580 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2581
2582 /*
2583 * The on_destroy above most likely is from an SLF call.
2584 * Since by definition the SLF call will not finish when we destroy
2585 * the coro, we will have to force-finish it here, otherwise
2586 * cleanup functions cannot call SLF functions.
2587 */
2588 coro->slf_frame.prepare = 0;
2589}
2590
2591/*
2592 * these not obviously related functions are all rolled into one
2593 * function to increase chances that they all will call transfer with the same
2594 * stack offset
2595 * SLF stands for "schedule-like-function".
2596 */
2597static OP *
2598pp_slf (pTHX)
2599{
2600 I32 checkmark; /* mark SP to see how many elements check has pushed */
2601
2602 /* set up the slf frame, unless it has already been set-up */
2603 /* the latter happens when a new coro has been started */
2604 /* or when a new cctx was attached to an existing coroutine */
2605 if (ecb_expect_true (!slf_frame.prepare))
2606 {
2607 /* first iteration */
2608 dSP;
2609 SV **arg = PL_stack_base + TOPMARK + 1;
2610 int items = SP - arg; /* args without function object */
2611 SV *gv = *sp;
2612
2613 /* do a quick consistency check on the "function" object, and if it isn't */
2614 /* for us, divert to the real entersub */
2615 if (SvTYPE (gv) != SVt_PVGV
2616 || !GvCV (gv)
2617 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2618 return PL_ppaddr[OP_ENTERSUB](aTHX);
2619
2620 if (!(PL_op->op_flags & OPf_STACKED))
889 { 2621 {
890 coro_nready--; 2622 /* ampersand-form of call, use @_ instead of stack */
891 return av_shift (coro_ready[prio]); 2623 AV *av = GvAV (PL_defgv);
2624 arg = AvARRAY (av);
2625 items = AvFILLp (av) + 1;
892 } 2626 }
2627
2628 /* now call the init function, which needs to set up slf_frame */
2629 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2630 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2631
2632 /* pop args */
2633 SP = PL_stack_base + POPMARK;
2634
2635 PUTBACK;
2636 }
2637
2638 /* now that we have a slf_frame, interpret it! */
2639 /* we use a callback system not to make the code needlessly */
2640 /* complicated, but so we can run multiple perl coros from one cctx */
2641
2642 do
2643 {
2644 struct coro_transfer_args ta;
2645
2646 slf_frame.prepare (aTHX_ &ta);
2647 TRANSFER (ta, 0);
2648
2649 checkmark = PL_stack_sp - PL_stack_base;
2650 }
2651 while (slf_frame.check (aTHX_ &slf_frame));
2652
2653 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2654
2655 /* exception handling */
2656 if (ecb_expect_false (CORO_THROW))
2657 {
2658 SV *exception = sv_2mortal (CORO_THROW);
2659
2660 CORO_THROW = 0;
2661 sv_setsv (ERRSV, exception);
2662 croak (0);
2663 }
2664
2665 /* return value handling - mostly like entersub */
2666 /* make sure we put something on the stack in scalar context */
2667 if (GIMME_V == G_SCALAR
2668 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2669 {
2670 dSP;
2671 SV **bot = PL_stack_base + checkmark;
2672
2673 if (sp == bot) /* too few, push undef */
2674 bot [1] = &PL_sv_undef;
2675 else /* too many, take last one */
2676 bot [1] = *sp;
2677
2678 SP = bot + 1;
2679
2680 PUTBACK;
2681 }
2682
2683 return NORMAL;
2684}
2685
2686static void
2687api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2688{
2689 int i;
2690 SV **arg = PL_stack_base + ax;
2691 int items = PL_stack_sp - arg + 1;
2692
2693 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2694
2695 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2696 && PL_op->op_ppaddr != pp_slf)
2697 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2698
2699 CvFLAGS (cv) |= CVf_SLF;
2700 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2701 slf_cv = cv;
2702
2703 /* we patch the op, and then re-run the whole call */
2704 /* we have to put the same argument on the stack for this to work */
2705 /* and this will be done by pp_restore */
2706 slf_restore.op_next = (OP *)&slf_restore;
2707 slf_restore.op_type = OP_CUSTOM;
2708 slf_restore.op_ppaddr = pp_restore;
2709 slf_restore.op_first = PL_op;
2710
2711 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2712
2713 if (PL_op->op_flags & OPf_STACKED)
2714 {
2715 if (items > slf_arga)
2716 {
2717 slf_arga = items;
2718 Safefree (slf_argv);
2719 New (0, slf_argv, slf_arga, SV *);
2720 }
2721
2722 slf_argc = items;
2723
2724 for (i = 0; i < items; ++i)
2725 slf_argv [i] = SvREFCNT_inc (arg [i]);
2726 }
2727 else
2728 slf_argc = 0;
2729
2730 PL_op->op_ppaddr = pp_slf;
2731 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2732
2733 PL_op = (OP *)&slf_restore;
2734}
2735
2736/*****************************************************************************/
2737/* dynamic wind */
2738
2739static void
2740on_enterleave_call (pTHX_ SV *cb)
2741{
2742 dSP;
2743
2744 PUSHSTACK;
2745
2746 PUSHMARK (SP);
2747 PUTBACK;
2748 call_sv (cb, G_VOID | G_DISCARD);
2749 SPAGAIN;
2750
2751 POPSTACK;
2752}
2753
2754static SV *
2755coro_avp_pop_and_free (pTHX_ AV **avp)
2756{
2757 AV *av = *avp;
2758 SV *res = av_pop (av);
2759
2760 if (AvFILLp (av) < 0)
2761 {
2762 *avp = 0;
2763 SvREFCNT_dec (av);
2764 }
2765
2766 return res;
2767}
2768
2769static void
2770coro_pop_on_enter (pTHX_ void *coro)
2771{
2772 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2773 SvREFCNT_dec (cb);
2774}
2775
2776static void
2777coro_pop_on_leave (pTHX_ void *coro)
2778{
2779 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2780 on_enterleave_call (aTHX_ sv_2mortal (cb));
2781}
2782
2783/*****************************************************************************/
2784/* PerlIO::cede */
2785
2786typedef struct
2787{
2788 PerlIOBuf base;
2789 NV next, every;
2790} PerlIOCede;
2791
2792static IV ecb_cold
2793PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2794{
2795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2796
2797 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2798 self->next = nvtime () + self->every;
2799
2800 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2801}
2802
2803static SV * ecb_cold
2804PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2805{
2806 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2807
2808 return newSVnv (self->every);
2809}
2810
2811static IV
2812PerlIOCede_flush (pTHX_ PerlIO *f)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815 double now = nvtime ();
2816
2817 if (now >= self->next)
2818 {
2819 api_cede (aTHX);
2820 self->next = now + self->every;
2821 }
2822
2823 return PerlIOBuf_flush (aTHX_ f);
2824}
2825
2826static PerlIO_funcs PerlIO_cede =
2827{
2828 sizeof(PerlIO_funcs),
2829 "cede",
2830 sizeof(PerlIOCede),
2831 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2832 PerlIOCede_pushed,
2833 PerlIOBuf_popped,
2834 PerlIOBuf_open,
2835 PerlIOBase_binmode,
2836 PerlIOCede_getarg,
2837 PerlIOBase_fileno,
2838 PerlIOBuf_dup,
2839 PerlIOBuf_read,
2840 PerlIOBuf_unread,
2841 PerlIOBuf_write,
2842 PerlIOBuf_seek,
2843 PerlIOBuf_tell,
2844 PerlIOBuf_close,
2845 PerlIOCede_flush,
2846 PerlIOBuf_fill,
2847 PerlIOBase_eof,
2848 PerlIOBase_error,
2849 PerlIOBase_clearerr,
2850 PerlIOBase_setlinebuf,
2851 PerlIOBuf_get_base,
2852 PerlIOBuf_bufsiz,
2853 PerlIOBuf_get_ptr,
2854 PerlIOBuf_get_cnt,
2855 PerlIOBuf_set_ptrcnt,
2856};
2857
2858/*****************************************************************************/
2859/* Coro::Semaphore & Coro::Signal */
2860
2861static SV *
2862coro_waitarray_new (pTHX_ int count)
2863{
2864 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2865 AV *av = newAV ();
2866 SV **ary;
2867
2868 /* unfortunately, building manually saves memory */
2869 Newx (ary, 2, SV *);
2870 AvALLOC (av) = ary;
2871#if PERL_VERSION_ATLEAST (5,10,0)
2872 AvARRAY (av) = ary;
2873#else
2874 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2875 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2876 SvPVX ((SV *)av) = (char *)ary;
2877#endif
2878 AvMAX (av) = 1;
2879 AvFILLp (av) = 0;
2880 ary [0] = newSViv (count);
2881
2882 return newRV_noinc ((SV *)av);
2883}
2884
2885/* semaphore */
2886
2887static void
2888coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2889{
2890 SV *count_sv = AvARRAY (av)[0];
2891 IV count = SvIVX (count_sv);
2892
2893 count += adjust;
2894 SvIVX (count_sv) = count;
2895
2896 /* now wake up as many waiters as are expected to lock */
2897 while (count > 0 && AvFILLp (av) > 0)
2898 {
2899 SV *cb;
2900
2901 /* swap first two elements so we can shift a waiter */
2902 AvARRAY (av)[0] = AvARRAY (av)[1];
2903 AvARRAY (av)[1] = count_sv;
2904 cb = av_shift (av);
2905
2906 if (SvOBJECT (cb))
2907 {
2908 api_ready (aTHX_ cb);
2909 --count;
2910 }
2911 else if (SvTYPE (cb) == SVt_PVCV)
2912 {
2913 dSP;
2914 PUSHMARK (SP);
2915 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2916 PUTBACK;
2917 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2918 }
2919
2920 SvREFCNT_dec (cb);
2921 }
2922}
2923
2924static void
2925coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2926{
2927 /* call $sem->adjust (0) to possibly wake up some other waiters */
2928 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2929}
2930
2931static int
2932slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2933{
2934 AV *av = (AV *)frame->data;
2935 SV *count_sv = AvARRAY (av)[0];
2936 SV *coro_hv = SvRV (coro_current);
2937
2938 /* if we are about to throw, don't actually acquire the lock, just throw */
2939 if (CORO_THROW)
2940 return 0;
2941 else if (SvIVX (count_sv) > 0)
2942 {
2943 frame->destroy = 0;
2944
2945 if (acquire)
2946 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2947 else
2948 coro_semaphore_adjust (aTHX_ av, 0);
2949
2950 return 0;
2951 }
2952 else
2953 {
2954 int i;
2955 /* if we were woken up but can't down, we look through the whole */
2956 /* waiters list and only add us if we aren't in there already */
2957 /* this avoids some degenerate memory usage cases */
2958 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2959 if (AvARRAY (av)[i] == coro_hv)
2960 return 1;
2961
2962 av_push (av, SvREFCNT_inc (coro_hv));
2963 return 1;
2964 }
2965}
2966
2967static int
2968slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2969{
2970 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2971}
2972
2973static int
2974slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2975{
2976 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2977}
2978
2979static void
2980slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2981{
2982 AV *av = (AV *)SvRV (arg [0]);
2983
2984 if (SvIVX (AvARRAY (av)[0]) > 0)
2985 {
2986 frame->data = (void *)av;
2987 frame->prepare = prepare_nop;
2988 }
2989 else
2990 {
2991 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2992
2993 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2994 frame->prepare = prepare_schedule;
2995 /* to avoid race conditions when a woken-up coro gets terminated */
2996 /* we arrange for a temporary on_destroy that calls adjust (0) */
2997 frame->destroy = coro_semaphore_destroy;
2998 }
2999}
3000
3001static void
3002slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3003{
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_down;
3006}
3007
3008static void
3009slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3010{
3011 if (items >= 2)
3012 {
3013 /* callback form */
3014 AV *av = (AV *)SvRV (arg [0]);
3015 SV *cb_cv = s_get_cv_croak (arg [1]);
3016
3017 av_push (av, SvREFCNT_inc_NN (cb_cv));
3018
3019 if (SvIVX (AvARRAY (av)[0]) > 0)
3020 coro_semaphore_adjust (aTHX_ av, 0);
3021
3022 frame->prepare = prepare_nop;
3023 frame->check = slf_check_nop;
3024 }
3025 else
3026 {
3027 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3028 frame->check = slf_check_semaphore_wait;
3029 }
3030}
3031
3032/* signal */
3033
3034static void
3035coro_signal_wake (pTHX_ AV *av, int count)
3036{
3037 SvIVX (AvARRAY (av)[0]) = 0;
3038
3039 /* now signal count waiters */
3040 while (count > 0 && AvFILLp (av) > 0)
3041 {
3042 SV *cb;
3043
3044 /* swap first two elements so we can shift a waiter */
3045 cb = AvARRAY (av)[0];
3046 AvARRAY (av)[0] = AvARRAY (av)[1];
3047 AvARRAY (av)[1] = cb;
3048
3049 cb = av_shift (av);
3050
3051 if (SvTYPE (cb) == SVt_PVCV)
3052 {
3053 dSP;
3054 PUSHMARK (SP);
3055 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3056 PUTBACK;
3057 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3058 }
3059 else
3060 {
3061 api_ready (aTHX_ cb);
3062 sv_setiv (cb, 0); /* signal waiter */
3063 }
3064
3065 SvREFCNT_dec (cb);
3066
3067 --count;
3068 }
3069}
3070
3071static int
3072slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3073{
3074 /* if we are about to throw, also stop waiting */
3075 return SvROK ((SV *)frame->data) && !CORO_THROW;
3076}
3077
3078static void
3079slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3080{
3081 AV *av = (AV *)SvRV (arg [0]);
3082
3083 if (items >= 2)
3084 {
3085 SV *cb_cv = s_get_cv_croak (arg [1]);
3086 av_push (av, SvREFCNT_inc_NN (cb_cv));
3087
3088 if (SvIVX (AvARRAY (av)[0]))
3089 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3090
3091 frame->prepare = prepare_nop;
3092 frame->check = slf_check_nop;
3093 }
3094 else if (SvIVX (AvARRAY (av)[0]))
3095 {
3096 SvIVX (AvARRAY (av)[0]) = 0;
3097 frame->prepare = prepare_nop;
3098 frame->check = slf_check_nop;
3099 }
3100 else
3101 {
3102 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3103
3104 av_push (av, waiter);
3105
3106 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_signal_wait;
3109 }
3110}
3111
3112/*****************************************************************************/
3113/* Coro::AIO */
3114
3115#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3116
3117/* helper storage struct */
3118struct io_state
3119{
3120 int errorno;
3121 I32 laststype; /* U16 in 5.10.0 */
3122 int laststatval;
3123 Stat_t statcache;
3124};
3125
3126static void
3127coro_aio_callback (pTHX_ CV *cv)
3128{
3129 dXSARGS;
3130 AV *state = (AV *)S_GENSUB_ARG;
3131 SV *coro = av_pop (state);
3132 SV *data_sv = newSV (sizeof (struct io_state));
3133
3134 av_extend (state, items - 1);
3135
3136 sv_upgrade (data_sv, SVt_PV);
3137 SvCUR_set (data_sv, sizeof (struct io_state));
3138 SvPOK_only (data_sv);
3139
3140 {
3141 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3142
3143 data->errorno = errno;
3144 data->laststype = PL_laststype;
3145 data->laststatval = PL_laststatval;
3146 data->statcache = PL_statcache;
3147 }
3148
3149 /* now build the result vector out of all the parameters and the data_sv */
3150 {
3151 int i;
3152
3153 for (i = 0; i < items; ++i)
3154 av_push (state, SvREFCNT_inc_NN (ST (i)));
3155 }
3156
3157 av_push (state, data_sv);
3158
3159 api_ready (aTHX_ coro);
3160 SvREFCNT_dec (coro);
3161 SvREFCNT_dec ((AV *)state);
3162}
3163
3164static int
3165slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3166{
3167 AV *state = (AV *)frame->data;
3168
3169 /* if we are about to throw, return early */
3170 /* this does not cancel the aio request, but at least */
3171 /* it quickly returns */
3172 if (CORO_THROW)
3173 return 0;
3174
3175 /* one element that is an RV? repeat! */
3176 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3177 return 1;
3178
3179 /* restore status */
3180 {
3181 SV *data_sv = av_pop (state);
3182 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3183
3184 errno = data->errorno;
3185 PL_laststype = data->laststype;
3186 PL_laststatval = data->laststatval;
3187 PL_statcache = data->statcache;
3188
3189 SvREFCNT_dec (data_sv);
3190 }
3191
3192 /* push result values */
3193 {
3194 dSP;
3195 int i;
3196
3197 EXTEND (SP, AvFILLp (state) + 1);
3198 for (i = 0; i <= AvFILLp (state); ++i)
3199 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3200
3201 PUTBACK;
3202 }
893 3203
894 return 0; 3204 return 0;
895} 3205}
896 3206
897static void 3207static void
898api_ready (SV *coro) 3208slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
899{ 3209{
900 dTHX; 3210 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
901
902 if (SvROK (coro))
903 coro = SvRV (coro);
904
905 LOCK;
906 coro_enq (aTHX_ SvREFCNT_inc (coro));
907 UNLOCK;
908}
909
910static void
911api_schedule (void)
912{
913 dTHX;
914
915 SV *prev, *next;
916
917 LOCK;
918
919 prev = SvRV (GvSV (coro_current)); 3211 SV *coro_hv = SvRV (coro_current);
920 next = coro_deq (aTHX_ PRIO_MIN); 3212 struct coro *coro = SvSTATE_hv (coro_hv);
921 3213
922 if (!next) 3214 /* put our coroutine id on the state arg */
923 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3215 av_push (state, SvREFCNT_inc_NN (coro_hv));
924 3216
925 /* free this only after the transfer */ 3217 /* first see whether we have a non-zero priority and set it as AIO prio */
926 coro_mortal = prev; 3218 if (coro->prio)
927 SV_CORO (prev, "Coro::schedule"); 3219 {
3220 dSP;
928 3221
929 SvRV (GvSV (coro_current)) = next; 3222 static SV *prio_cv;
3223 static SV *prio_sv;
930 3224
931 SV_CORO (next, "Coro::schedule"); 3225 if (ecb_expect_false (!prio_cv))
3226 {
3227 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3228 prio_sv = newSViv (0);
3229 }
932 3230
933 UNLOCK; 3231 PUSHMARK (SP);
3232 sv_setiv (prio_sv, coro->prio);
3233 XPUSHs (prio_sv);
934 3234
935 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3235 PUTBACK;
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3236 call_sv (prio_cv, G_VOID | G_DISCARD);
937} 3237 }
938 3238
939static void 3239 /* now call the original request */
940api_cede (void) 3240 {
941{ 3241 dSP;
942 dTHX; 3242 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3243 int i;
943 3244
944 LOCK; 3245 PUSHMARK (SP);
945 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946 UNLOCK;
947 3246
948 api_schedule (); 3247 /* first push all args to the stack */
949} 3248 EXTEND (SP, items + 1);
950 3249
3250 for (i = 0; i < items; ++i)
3251 PUSHs (arg [i]);
3252
3253 /* now push the callback closure */
3254 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3255
3256 /* now call the AIO function - we assume our request is uncancelable */
3257 PUTBACK;
3258 call_sv ((SV *)req, G_VOID | G_DISCARD);
3259 }
3260
3261 /* now that the request is going, we loop till we have a result */
3262 frame->data = (void *)state;
3263 frame->prepare = prepare_schedule;
3264 frame->check = slf_check_aio_req;
3265}
3266
3267static void
3268coro_aio_req_xs (pTHX_ CV *cv)
3269{
3270 dXSARGS;
3271
3272 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3273
3274 XSRETURN_EMPTY;
3275}
3276
3277/*****************************************************************************/
3278
3279#if CORO_CLONE
3280# include "clone.c"
3281#endif
3282
3283/*****************************************************************************/
3284
3285static SV *
3286coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3287{
3288 SV *coro_sv;
3289 struct coro *coro;
3290 MAGIC *mg;
3291 HV *hv;
3292 SV *cb;
3293 int i;
3294
3295 if (argc > 0)
3296 {
3297 cb = s_get_cv_croak (argv [0]);
3298
3299 if (!is_coro)
3300 {
3301 if (CvISXSUB (cb))
3302 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3303
3304 if (!CvROOT (cb))
3305 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3306 }
3307 }
3308
3309 Newz (0, coro, 1, struct coro);
3310 coro->args = newAV ();
3311 coro->flags = CF_NEW;
3312
3313 if (coro_first) coro_first->prev = coro;
3314 coro->next = coro_first;
3315 coro_first = coro;
3316
3317 coro->hv = hv = newHV ();
3318 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3319 mg->mg_flags |= MGf_DUP;
3320 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3321
3322 if (argc > 0)
3323 {
3324 av_extend (coro->args, argc + is_coro - 1);
3325
3326 if (is_coro)
3327 {
3328 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3329 cb = (SV *)cv_coro_run;
3330 }
3331
3332 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3333
3334 for (i = 1; i < argc; i++)
3335 av_push (coro->args, newSVsv (argv [i]));
3336 }
3337
3338 return coro_sv;
3339}
3340
3341#ifndef __cplusplus
3342ecb_cold XS(boot_Coro__State);
3343#endif
3344
3345#if CORO_JIT
3346
3347static void ecb_noinline ecb_cold
3348pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3349{
3350 dSP;
3351 AV *av = newAV ();
3352
3353 av_store (av, 3, newSVuv (d));
3354 av_store (av, 2, newSVuv (c));
3355 av_store (av, 1, newSVuv (b));
3356 av_store (av, 0, newSVuv (a));
3357
3358 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3359
3360 PUTBACK;
3361}
3362
3363static void ecb_noinline ecb_cold
3364jit_init (pTHX)
3365{
3366 dSP;
3367 SV *load, *save;
3368 char *map_base;
3369 char *load_ptr, *save_ptr;
3370 STRLEN load_len, save_len, map_len;
3371 int count;
3372
3373 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3374
3375 PUSHMARK (SP);
3376#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3377# include "state.h"
3378#undef VARx
3379 count = call_pv ("Coro::State::_jit", G_ARRAY);
3380 SPAGAIN;
3381
3382 save = POPs; save_ptr = SvPVbyte (save, save_len);
3383 load = POPs; load_ptr = SvPVbyte (load, load_len);
3384
3385 map_len = load_len + save_len + 16;
3386
3387 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3388
3389 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3390
3391 load_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, load_ptr, load_len);
3393
3394 map_base += (load_len + 15) & ~15;
3395
3396 save_perl_slots = (load_save_perl_slots_type)map_base;
3397 memcpy (map_base, save_ptr, save_len);
3398
3399 /* we are good citizens and try to make the page read-only, so the evil evil */
3400 /* hackers might have it a bit more difficult */
3401 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3402
3403 PUTBACK;
3404 eval_pv ("undef &Coro::State::_jit", 1);
3405}
3406
3407#endif
3408
951MODULE = Coro::State PACKAGE = Coro::State 3409MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952 3410
953PROTOTYPES: ENABLE 3411PROTOTYPES: DISABLE
954 3412
955BOOT: 3413BOOT:
956{ /* {} necessary for stoopid perl-5.6.x */ 3414{
957#ifdef USE_ITHREADS 3415#ifdef USE_ITHREADS
958 MUTEX_INIT (&coro_mutex); 3416# if CORO_PTHREAD
3417 coro_thx = PERL_GET_CONTEXT;
3418# endif
959#endif 3419#endif
3420 BOOT_PAGESIZE;
960 3421
961 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3422 /* perl defines these to check for existance first, but why it doesn't */
962 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3423 /* just create them one at init time is not clear to me, except for */
3424 /* programs trying to delete them, but... */
3425 /* anyway, we declare this as invalid and make sure they are initialised here */
3426 DEFSV;
3427 ERRSV;
3428
3429 cctx_current = cctx_new_empty ();
3430
3431 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3432 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3433
3434 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3435 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3436 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3437
3438 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3439 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3440 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3441
963 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3442 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964 3443
965 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3444 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3445 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3446 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3447 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969 3448
970 main_mainstack = PL_mainstack; 3449 main_mainstack = PL_mainstack;
3450 main_top_env = PL_top_env;
971 3451
3452 while (main_top_env->je_prev)
3453 main_top_env = main_top_env->je_prev;
3454
3455 {
3456 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3457
3458 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3459 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3460
3461 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3462 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3463 }
3464
972 coroapi.ver = CORO_API_VERSION; 3465 coroapi.ver = CORO_API_VERSION;
3466 coroapi.rev = CORO_API_REVISION;
3467
973 coroapi.transfer = api_transfer; 3468 coroapi.transfer = api_transfer;
974}
975 3469
976Coro::State 3470 coroapi.sv_state = SvSTATE_;
977_newprocess(args) 3471 coroapi.execute_slf = api_execute_slf;
978 SV * args 3472 coroapi.prepare_nop = prepare_nop;
979 PROTOTYPE: $ 3473 coroapi.prepare_schedule = prepare_schedule;
3474 coroapi.prepare_cede = prepare_cede;
3475 coroapi.prepare_cede_notself = prepare_cede_notself;
3476
3477 time_init (aTHX);
3478
3479 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3480#if CORO_JIT
3481 PUTBACK;
3482 jit_init (aTHX);
3483 SPAGAIN;
3484#endif
3485}
3486
3487SV *
3488new (SV *klass, ...)
3489 ALIAS:
3490 Coro::new = 1
980 CODE: 3491 CODE:
981 Coro__State coro; 3492 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
982 3493 OUTPUT:
983 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984 croak ("Coro::State::_newprocess expects an arrayref");
985
986 Newz (0, coro, 1, struct coro);
987
988 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
989 /*coro->mainstack = 0; *//*actual work is done inside transfer */
990 /*coro->stack = 0;*/
991
992 /* same as JMPENV_BOOTSTRAP */
993 /* we might be able to recycle start_env, but safe is safe */
994 /*Zero(&coro->start_env, 1, JMPENV);*/
995 coro->start_env.je_ret = -1;
996 coro->start_env.je_mustcatch = TRUE;
997
998 RETVAL = coro;
999 OUTPUT:
1000 RETVAL 3494 RETVAL
1001 3495
1002void 3496void
1003transfer(prev, next, flags) 3497transfer (...)
1004 SV *prev
1005 SV *next
1006 int flags
1007 PROTOTYPE: @ 3498 PROTOTYPE: $$
1008 CODE: 3499 CODE:
1009 PUTBACK; 3500 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1010 SV_CORO (next, "Coro::transfer");
1011 SV_CORO (prev, "Coro::transfer");
1012 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1013 SPAGAIN;
1014 3501
1015void 3502void
1016DESTROY(coro)
1017 Coro::State coro
1018 CODE:
1019
1020 if (coro->mainstack && coro->mainstack != main_mainstack)
1021 {
1022 struct coro temp;
1023
1024 PUTBACK;
1025 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026 LOAD (aTHX_ coro);
1027 SPAGAIN;
1028
1029 destroy_stacks (aTHX);
1030
1031 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032 SPAGAIN;
1033
1034 coro->mainstack = 0;
1035 }
1036
1037 deallocate_stack (coro);
1038 SvREFCNT_dec (coro->args);
1039 Safefree (coro);
1040
1041void
1042_exit(code) 3503_exit (int code)
1043 int code
1044 PROTOTYPE: $ 3504 PROTOTYPE: $
1045 CODE: 3505 CODE:
1046 _exit (code); 3506 _exit (code);
1047 3507
1048MODULE = Coro::State PACKAGE = Coro::Cont 3508SV *
3509clone (Coro::State coro)
3510 CODE:
3511{
3512#if CORO_CLONE
3513 struct coro *ncoro = coro_clone (aTHX_ coro);
3514 MAGIC *mg;
3515 /* TODO: too much duplication */
3516 ncoro->hv = newHV ();
3517 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3518 mg->mg_flags |= MGf_DUP;
3519 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3520#else
3521 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3522#endif
3523}
3524 OUTPUT:
3525 RETVAL
1049 3526
1050# this is slightly dirty (should expose a c-level api) 3527int
3528cctx_stacksize (int new_stacksize = 0)
3529 PROTOTYPE: ;$
3530 CODE:
3531 RETVAL = cctx_stacksize;
3532 if (new_stacksize)
3533 {
3534 cctx_stacksize = new_stacksize;
3535 ++cctx_gen;
3536 }
3537 OUTPUT:
3538 RETVAL
3539
3540int
3541cctx_max_idle (int max_idle = 0)
3542 PROTOTYPE: ;$
3543 CODE:
3544 RETVAL = cctx_max_idle;
3545 if (max_idle > 1)
3546 cctx_max_idle = max_idle;
3547 OUTPUT:
3548 RETVAL
3549
3550int
3551cctx_count ()
3552 PROTOTYPE:
3553 CODE:
3554 RETVAL = cctx_count;
3555 OUTPUT:
3556 RETVAL
3557
3558int
3559cctx_idle ()
3560 PROTOTYPE:
3561 CODE:
3562 RETVAL = cctx_idle;
3563 OUTPUT:
3564 RETVAL
1051 3565
1052void 3566void
1053yield(...) 3567list ()
1054 PROTOTYPE: @ 3568 PROTOTYPE:
3569 PPCODE:
3570{
3571 struct coro *coro;
3572 for (coro = coro_first; coro; coro = coro->next)
3573 if (coro->hv)
3574 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3575}
3576
3577void
3578call (Coro::State coro, SV *coderef)
3579 ALIAS:
3580 eval = 1
3581 CODE:
3582{
3583 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3584 {
3585 struct coro *current = SvSTATE_current;
3586 struct CoroSLF slf_save;
3587
3588 if (current != coro)
3589 {
3590 PUTBACK;
3591 save_perl (aTHX_ current);
3592 load_perl (aTHX_ coro);
3593 /* the coro is most likely in an active SLF call.
3594 * while not strictly required (the code we execute is
3595 * not allowed to call any SLF functions), it's cleaner
3596 * to reinitialise the slf_frame and restore it later.
3597 * This might one day allow us to actually do SLF calls
3598 * from code executed here.
3599 */
3600 slf_save = slf_frame;
3601 slf_frame.prepare = 0;
3602 SPAGAIN;
3603 }
3604
3605 PUSHSTACK;
3606
3607 PUSHMARK (SP);
3608 PUTBACK;
3609
3610 if (ix)
3611 eval_sv (coderef, 0);
3612 else
3613 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3614
3615 POPSTACK;
3616 SPAGAIN;
3617
3618 if (current != coro)
3619 {
3620 PUTBACK;
3621 slf_frame = slf_save;
3622 save_perl (aTHX_ coro);
3623 load_perl (aTHX_ current);
3624 SPAGAIN;
3625 }
3626 }
3627}
3628
3629SV *
3630is_ready (Coro::State coro)
3631 PROTOTYPE: $
3632 ALIAS:
3633 is_ready = CF_READY
3634 is_running = CF_RUNNING
3635 is_new = CF_NEW
3636 is_destroyed = CF_ZOMBIE
3637 is_zombie = CF_ZOMBIE
3638 is_suspended = CF_SUSPENDED
3639 CODE:
3640 RETVAL = boolSV (coro->flags & ix);
3641 OUTPUT:
3642 RETVAL
3643
3644void
3645throw (Coro::State self, SV *exception = &PL_sv_undef)
3646 PROTOTYPE: $;$
1055 CODE: 3647 CODE:
1056 SV *yieldstack; 3648{
1057 SV *sv; 3649 struct coro *current = SvSTATE_current;
1058 AV *defav = GvAV (PL_defgv); 3650 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1059 struct coro *prev, *next;
1060
1061 yieldstack = *hv_fetch (
1062 (HV *)SvRV (GvSV (coro_current)),
1063 "yieldstack", sizeof ("yieldstack") - 1,
1064 0
1065 );
1066
1067 /* set up @_ -- ugly */
1068 av_clear (defav);
1069 av_fill (defav, items - 1);
1070 while (items--)
1071 av_store (defav, items, SvREFCNT_inc (ST(items)));
1072
1073 sv = av_pop ((AV *)SvRV (yieldstack));
1074 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076 SvREFCNT_dec (sv); 3651 SvREFCNT_dec (*exceptionp);
1077 3652 SvGETMAGIC (exception);
1078 transfer (aTHX_ prev, next, 0); 3653 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1079
1080MODULE = Coro::State PACKAGE = Coro
1081
1082# this is slightly dirty (should expose a c-level api)
1083
1084BOOT:
1085{
1086 int i;
1087 HV *stash = gv_stashpv ("Coro", TRUE);
1088
1089 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095
1096 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1097 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1098
1099 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1100 coro_ready[i] = newAV ();
1101
1102 {
1103 SV *sv = perl_get_sv("Coro::API", 1);
1104
1105 coroapi.schedule = api_schedule;
1106 coroapi.cede = api_cede;
1107 coroapi.ready = api_ready;
1108 coroapi.nready = &coro_nready;
1109 coroapi.current = coro_current;
1110
1111 GCoroAPI = &coroapi;
1112 sv_setiv(sv, (IV)&coroapi);
1113 SvREADONLY_on(sv);
1114 }
1115} 3654}
1116
1117#if !PERL_MICRO
1118 3655
1119void 3656void
1120ready(self) 3657api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1121 SV * self 3658 PROTOTYPE: $;$
3659 C_ARGS: aTHX_ coro, flags
3660
3661SV *
3662has_cctx (Coro::State coro)
1122 PROTOTYPE: $ 3663 PROTOTYPE: $
1123 CODE: 3664 CODE:
1124 api_ready (self); 3665 /* maybe manage the running flag differently */
1125 3666 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1126#endif 3667 OUTPUT:
3668 RETVAL
1127 3669
1128int 3670int
3671is_traced (Coro::State coro)
3672 PROTOTYPE: $
3673 CODE:
3674 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3675 OUTPUT:
3676 RETVAL
3677
3678UV
3679rss (Coro::State coro)
3680 PROTOTYPE: $
3681 ALIAS:
3682 usecount = 1
3683 CODE:
3684 switch (ix)
3685 {
3686 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3687 case 1: RETVAL = coro->usecount; break;
3688 }
3689 OUTPUT:
3690 RETVAL
3691
3692void
3693force_cctx ()
3694 PROTOTYPE:
3695 CODE:
3696 cctx_current->idle_sp = 0;
3697
3698void
3699swap_defsv (Coro::State self)
3700 PROTOTYPE: $
3701 ALIAS:
3702 swap_defav = 1
3703 CODE:
3704 if (!self->slot)
3705 croak ("cannot swap state with coroutine that has no saved state,");
3706 else
3707 {
3708 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3709 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3710
3711 SV *tmp = *src; *src = *dst; *dst = tmp;
3712 }
3713
3714void
3715cancel (Coro::State self)
3716 CODE:
3717 coro_state_destroy (aTHX_ self);
3718
3719SV *
3720enable_times (int enabled = enable_times)
3721 CODE:
3722{
3723 RETVAL = boolSV (enable_times);
3724
3725 if (enabled != enable_times)
3726 {
3727 enable_times = enabled;
3728
3729 coro_times_update ();
3730 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3731 }
3732}
3733 OUTPUT:
3734 RETVAL
3735
3736void
3737times (Coro::State self)
3738 PPCODE:
3739{
3740 struct coro *current = SvSTATE (coro_current);
3741
3742 if (ecb_expect_false (current == self))
3743 {
3744 coro_times_update ();
3745 coro_times_add (SvSTATE (coro_current));
3746 }
3747
3748 EXTEND (SP, 2);
3749 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3750 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3751
3752 if (ecb_expect_false (current == self))
3753 coro_times_sub (SvSTATE (coro_current));
3754}
3755
3756void
3757swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3758 CODE:
3759{
3760 struct coro *current = SvSTATE_current;
3761
3762 if (current == coro)
3763 SWAP_SVS (current);
3764
3765 if (!coro->swap_sv)
3766 coro->swap_sv = newAV ();
3767
3768 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3769 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3770
3771 if (current == coro)
3772 SWAP_SVS (current);
3773}
3774
3775
3776MODULE = Coro::State PACKAGE = Coro
3777
3778BOOT:
3779{
3780 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3781 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3782 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3783 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3784 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3785 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3786 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3787 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3788
3789 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3790 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3791 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3792 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3793
3794 coro_stash = gv_stashpv ("Coro", TRUE);
3795
3796 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3797 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3798 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3799 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3800 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3801 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3802
3803 {
3804 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3805
3806 coroapi.schedule = api_schedule;
3807 coroapi.schedule_to = api_schedule_to;
3808 coroapi.cede = api_cede;
3809 coroapi.cede_notself = api_cede_notself;
3810 coroapi.ready = api_ready;
3811 coroapi.is_ready = api_is_ready;
3812 coroapi.nready = coro_nready;
3813 coroapi.current = coro_current;
3814
3815 /*GCoroAPI = &coroapi;*/
3816 sv_setiv (sv, (IV)&coroapi);
3817 SvREADONLY_on (sv);
3818 }
3819}
3820
3821SV *
3822async (...)
3823 PROTOTYPE: &@
3824 CODE:
3825 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3826 api_ready (aTHX_ RETVAL);
3827 OUTPUT:
3828 RETVAL
3829
3830void
3831_destroy (Coro::State coro)
3832 CODE:
3833 /* used by the manager thread */
3834 coro_state_destroy (aTHX_ coro);
3835
3836void
3837on_destroy (Coro::State coro, SV *cb)
3838 CODE:
3839 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3840
3841void
3842join (...)
3843 CODE:
3844 CORO_EXECUTE_SLF_XS (slf_init_join);
3845
3846void
3847terminate (...)
3848 CODE:
3849 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3850
3851void
3852cancel (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3855
3856int
3857safe_cancel (Coro::State self, ...)
3858 C_ARGS: aTHX_ self, &ST (1), items - 1
3859
3860void
3861schedule (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3864
3865void
3866schedule_to (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3869
3870void
3871cede_to (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3874
3875void
3876cede (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_cede);
3879
3880void
3881cede_notself (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3884
3885void
3886_set_current (SV *current)
3887 PROTOTYPE: $
3888 CODE:
3889 SvREFCNT_dec (SvRV (coro_current));
3890 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3891
3892void
3893_set_readyhook (SV *hook)
3894 PROTOTYPE: $
3895 CODE:
3896 SvREFCNT_dec (coro_readyhook);
3897 SvGETMAGIC (hook);
3898 if (SvOK (hook))
3899 {
3900 coro_readyhook = newSVsv (hook);
3901 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3902 }
3903 else
3904 {
3905 coro_readyhook = 0;
3906 CORO_READYHOOK = 0;
3907 }
3908
3909int
3910prio (Coro::State coro, int newprio = 0)
3911 PROTOTYPE: $;$
3912 ALIAS:
3913 nice = 1
3914 CODE:
3915{
3916 RETVAL = coro->prio;
3917
3918 if (items > 1)
3919 {
3920 if (ix)
3921 newprio = coro->prio - newprio;
3922
3923 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3924 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3925
3926 coro->prio = newprio;
3927 }
3928}
3929 OUTPUT:
3930 RETVAL
3931
3932SV *
3933ready (SV *self)
3934 PROTOTYPE: $
3935 CODE:
3936 RETVAL = boolSV (api_ready (aTHX_ self));
3937 OUTPUT:
3938 RETVAL
3939
3940int
1129nready(...) 3941nready (...)
1130 PROTOTYPE: 3942 PROTOTYPE:
1131 CODE: 3943 CODE:
1132 RETVAL = coro_nready; 3944 RETVAL = coro_nready;
1133 OUTPUT: 3945 OUTPUT:
1134 RETVAL 3946 RETVAL
1135 3947
1136void 3948void
1137schedule(...) 3949suspend (Coro::State self)
1138 PROTOTYPE: 3950 PROTOTYPE: $
1139 CODE: 3951 CODE:
1140 api_schedule (); 3952 self->flags |= CF_SUSPENDED;
1141 3953
1142void 3954void
1143cede(...) 3955resume (Coro::State self)
1144 PROTOTYPE: 3956 PROTOTYPE: $
1145 CODE: 3957 CODE:
3958 self->flags &= ~CF_SUSPENDED;
3959
3960void
3961_pool_handler (...)
3962 CODE:
3963 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3964
3965void
3966async_pool (SV *cv, ...)
3967 PROTOTYPE: &@
3968 PPCODE:
3969{
3970 HV *hv = (HV *)av_pop (av_async_pool);
3971 AV *av = newAV ();
3972 SV *cb = ST (0);
3973 int i;
3974
3975 av_extend (av, items - 2);
3976 for (i = 1; i < items; ++i)
3977 av_push (av, SvREFCNT_inc_NN (ST (i)));
3978
3979 if ((SV *)hv == &PL_sv_undef)
3980 {
3981 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3982 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3983 SvREFCNT_dec (sv);
3984 }
3985
3986 {
3987 struct coro *coro = SvSTATE_hv (hv);
3988
3989 assert (!coro->invoke_cb);
3990 assert (!coro->invoke_av);
3991 coro->invoke_cb = SvREFCNT_inc (cb);
3992 coro->invoke_av = av;
3993 }
3994
3995 api_ready (aTHX_ (SV *)hv);
3996
3997 if (GIMME_V != G_VOID)
3998 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3999 else
4000 SvREFCNT_dec (hv);
4001}
4002
4003SV *
4004rouse_cb ()
4005 PROTOTYPE:
4006 CODE:
4007 RETVAL = coro_new_rouse_cb (aTHX);
4008 OUTPUT:
4009 RETVAL
4010
4011void
4012rouse_wait (...)
4013 PROTOTYPE: ;$
4014 PPCODE:
4015 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4016
4017void
4018on_enter (SV *block)
4019 ALIAS:
4020 on_leave = 1
4021 PROTOTYPE: &
4022 CODE:
4023{
4024 struct coro *coro = SvSTATE_current;
4025 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4026
4027 block = s_get_cv_croak (block);
4028
4029 if (!*avp)
4030 *avp = newAV ();
4031
4032 av_push (*avp, SvREFCNT_inc (block));
4033
4034 if (!ix)
4035 on_enterleave_call (aTHX_ block);
4036
4037 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4038 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4039 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4040}
4041
4042
4043MODULE = Coro::State PACKAGE = PerlIO::cede
4044
4045BOOT:
4046 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4047
4048
4049MODULE = Coro::State PACKAGE = Coro::Semaphore
4050
4051SV *
4052new (SV *klass, SV *count = 0)
4053 CODE:
4054{
4055 int semcnt = 1;
4056
4057 if (count)
4058 {
4059 SvGETMAGIC (count);
4060
4061 if (SvOK (count))
4062 semcnt = SvIV (count);
4063 }
4064
4065 RETVAL = sv_bless (
4066 coro_waitarray_new (aTHX_ semcnt),
4067 GvSTASH (CvGV (cv))
4068 );
4069}
4070 OUTPUT:
4071 RETVAL
4072
4073# helper for Coro::Channel and others
4074SV *
4075_alloc (int count)
4076 CODE:
4077 RETVAL = coro_waitarray_new (aTHX_ count);
4078 OUTPUT:
4079 RETVAL
4080
4081SV *
4082count (SV *self)
4083 CODE:
4084 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4085 OUTPUT:
4086 RETVAL
4087
4088void
4089up (SV *self, int adjust = 1)
4090 ALIAS:
4091 adjust = 1
4092 CODE:
4093 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4094
4095void
4096down (...)
4097 CODE:
4098 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4099
4100void
4101wait (...)
4102 CODE:
4103 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4104
4105void
4106try (SV *self)
4107 PPCODE:
4108{
4109 AV *av = (AV *)SvRV (self);
4110 SV *count_sv = AvARRAY (av)[0];
4111 IV count = SvIVX (count_sv);
4112
4113 if (count > 0)
4114 {
4115 --count;
4116 SvIVX (count_sv) = count;
4117 XSRETURN_YES;
4118 }
4119 else
4120 XSRETURN_NO;
4121}
4122
4123void
4124waiters (SV *self)
4125 PPCODE:
4126{
4127 AV *av = (AV *)SvRV (self);
4128 int wcount = AvFILLp (av) + 1 - 1;
4129
4130 if (GIMME_V == G_SCALAR)
4131 XPUSHs (sv_2mortal (newSViv (wcount)));
4132 else
4133 {
4134 int i;
4135 EXTEND (SP, wcount);
4136 for (i = 1; i <= wcount; ++i)
4137 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4138 }
4139}
4140
4141MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4142
4143void
4144_may_delete (SV *sem, int count, unsigned int extra_refs)
4145 PPCODE:
4146{
4147 AV *av = (AV *)SvRV (sem);
4148
4149 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4150 && AvFILLp (av) == 0 /* no waiters, just count */
4151 && SvIV (AvARRAY (av)[0]) == count)
4152 XSRETURN_YES;
4153
4154 XSRETURN_NO;
4155}
4156
4157MODULE = Coro::State PACKAGE = Coro::Signal
4158
4159SV *
4160new (SV *klass)
4161 CODE:
4162 RETVAL = sv_bless (
4163 coro_waitarray_new (aTHX_ 0),
4164 GvSTASH (CvGV (cv))
4165 );
4166 OUTPUT:
4167 RETVAL
4168
4169void
4170wait (...)
4171 CODE:
4172 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4173
4174void
4175broadcast (SV *self)
4176 CODE:
4177{
4178 AV *av = (AV *)SvRV (self);
4179 coro_signal_wake (aTHX_ av, AvFILLp (av));
4180}
4181
4182void
4183send (SV *self)
4184 CODE:
4185{
4186 AV *av = (AV *)SvRV (self);
4187
4188 if (AvFILLp (av))
4189 coro_signal_wake (aTHX_ av, 1);
4190 else
4191 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4192}
4193
4194IV
4195awaited (SV *self)
4196 CODE:
4197 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4198 OUTPUT:
4199 RETVAL
4200
4201
4202MODULE = Coro::State PACKAGE = Coro::AnyEvent
4203
4204BOOT:
4205 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4206
4207void
4208_schedule (...)
4209 CODE:
4210{
4211 static int incede;
4212
1146 api_cede (); 4213 api_cede_notself (aTHX);
1147 4214
4215 ++incede;
4216 while (coro_nready >= incede && api_cede (aTHX))
4217 ;
4218
4219 sv_setsv (sv_activity, &PL_sv_undef);
4220 if (coro_nready >= incede)
4221 {
4222 PUSHMARK (SP);
4223 PUTBACK;
4224 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4225 }
4226
4227 --incede;
4228}
4229
4230
4231MODULE = Coro::State PACKAGE = Coro::AIO
4232
4233void
4234_register (char *target, char *proto, SV *req)
4235 CODE:
4236{
4237 SV *req_cv = s_get_cv_croak (req);
4238 /* newXSproto doesn't return the CV on 5.8 */
4239 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4240 sv_setpv ((SV *)slf_cv, proto);
4241 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4242}
4243
4244MODULE = Coro::State PACKAGE = Coro::Select
4245
4246void
4247patch_pp_sselect ()
4248 CODE:
4249 if (!coro_old_pp_sselect)
4250 {
4251 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4252 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4253 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4254 }
4255
4256void
4257unpatch_pp_sselect ()
4258 CODE:
4259 if (coro_old_pp_sselect)
4260 {
4261 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4262 coro_old_pp_sselect = 0;
4263 }
4264

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