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Comparing Coro/Coro/State.xs (file contents):
Revision 1.32 by root, Sun Aug 26 17:01:54 2001 UTC vs.
Revision 1.417 by root, Sun Feb 19 11:14:45 2012 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
17#include "ecb.h"
6 18
19#include <stddef.h>
7#include <signal.h> 20#include <stdio.h>
21#include <errno.h>
22#include <assert.h>
8 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
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
37
9#ifdef HAVE_MMAP 38#if HAVE_MMAP
10# include <unistd.h> 39# include <unistd.h>
11# include <sys/mman.h> 40# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 42# ifdef MAP_ANON
43# define MAP_ANONYMOUS MAP_ANON
15# else 44# else
16# undef HAVE_MMAP 45# undef HAVE_MMAP
17# endif 46# endif
18# 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
19#endif 55# endif
56#else
57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
59#endif
20 60
21#define MAY_FLUSH /* increases codesize and is rarely used */ 61#if CORO_USE_VALGRIND
62# include <valgrind/valgrind.h>
63#endif
22 64
23#define SUB_INIT "Coro::State::initialize" 65/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 66static int cctx_max_idle = 4;
25 67
26/* The next macro should declare a variable stacklevel that contains and approximation 68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
27 * to the current C stack pointer. Its property is that it changes with each call 69# define HAS_SCOPESTACK_NAME 1
28 * and should be unique. */ 70#endif
71
72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
73# undef CORO_STACKGUARD
74#endif
75
76#ifndef CORO_STACKGUARD
77# define CORO_STACKGUARD 0
78#endif
79
80/* prefer perl internal functions over our own? */
81#ifndef CORO_PREFER_PERL_FUNCTIONS
82# define CORO_PREFER_PERL_FUNCTIONS 0
83#endif
84
85/* The next macros try to return the current stack pointer, in an as
86 * portable way as possible. */
87#if __GNUC__ >= 4
88# define dSTACKLEVEL int stacklevel_dummy
89# define STACKLEVEL __builtin_frame_address (0)
90#else
91# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 92# define STACKLEVEL ((void *)&stacklevel)
93#endif
30 94
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 95#define IN_DESTRUCT PL_dirty
32 96
33#include "CoroAPI.h" 97#include "CoroAPI.h"
98#define GCoroAPI (&coroapi) /* very sneaky */
34 99
100#ifdef USE_ITHREADS
101# if CORO_PTHREAD
102static void *coro_thx;
103# endif
104#endif
105
106/* used in state.h */
107#define VAR(name,type) VARx(name, PL_ ## name, type)
108
109#ifdef __linux
110# include <time.h> /* for timespec */
111# include <syscall.h> /* for SYS_* */
112# ifdef SYS_clock_gettime
113# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
114# define CORO_CLOCK_MONOTONIC 1
115# define CORO_CLOCK_THREAD_CPUTIME_ID 3
116# endif
117#endif
118
119static double (*nvtime)(); /* so why doesn't it take void? */
120static void (*u2time)(pTHX_ UV ret[2]);
121
122/* we hijack an hopefully unused CV flag for our purposes */
123#define CVf_SLF 0x4000
124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
126
127static U32 cctx_gen;
128static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
130static AV *main_mainstack; /* used to differentiate between $main and others */
131static JMPENV *main_top_env;
132static HV *coro_state_stash, *coro_stash;
133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 134
37/* this is actually not only the c stack but also c registers etc... */ 135static AV *av_destroy; /* destruction queue */
136static SV *sv_manager; /* the manager coro */
137static SV *sv_idle; /* $Coro::idle */
138
139static GV *irsgv; /* $/ */
140static GV *stdoutgv; /* *STDOUT */
141static SV *rv_diehook;
142static SV *rv_warnhook;
143static HV *hv_sig; /* %SIG */
144
145/* async_pool helper stuff */
146static SV *sv_pool_rss;
147static SV *sv_pool_size;
148static SV *sv_async_pool_idle; /* description string */
149static AV *av_async_pool; /* idle pool */
150static SV *sv_Coro; /* class string */
151static CV *cv_pool_handler;
152
153/* Coro::AnyEvent */
154static SV *sv_activity;
155
156/* enable processtime/realtime profiling */
157static char enable_times;
158typedef U32 coro_ts[2];
159static coro_ts time_real, time_cpu;
160static char times_valid;
161
162static struct coro_cctx *cctx_first;
163static int cctx_count, cctx_idle;
164
165enum
166{
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
175/* this is a structure representing a c-level coroutine */
38typedef struct { 176typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 177{
40 int usecnt; /* shared by how many coroutines */ 178 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 179
180 /* the stack */
181 void *sptr;
182 size_t ssize;
183
184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
189 JMPENV *top_env;
43 coro_context cctx; 190 coro_context cctx;
44 191
45 void *sptr; 192 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 193#if CORO_USE_VALGRIND
47} coro_stack; 194 int valgrind_id;
195#endif
196 unsigned char flags;
197} coro_cctx;
48 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
205enum
206{
207 CF_RUNNING = 0x0001, /* coroutine is running */
208 CF_READY = 0x0002, /* coroutine is ready */
209 CF_NEW = 0x0004, /* has never been switched to */
210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
213};
214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218#define VARx(name,expr,type) type name;
219# include "state.h"
220#undef VARx
221} perl_slots;
222
223/* how many context stack entries do we need for perl_slots */
224#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
225
226/* this is a structure representing a perl-level coroutine */
49struct coro { 227struct coro
50 /* the optional C context */ 228{
51 coro_stack *stack; 229 /* the C coroutine allocated to this perl coroutine, if any */
52 void *cursp; 230 coro_cctx *cctx;
53 int gencnt;
54 231
55 /* optionally saved, might be zero */ 232 /* ready queue */
56 AV *defav; 233 struct coro *next_ready;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63 234
64 /* the stacks and related info (callchain etc..) */ 235 /* state data */
65 PERL_SI *curstackinfo; 236 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 237 AV *mainstack;
68 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 239
240 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
244
245 /* statistics */
246 int usecount; /* number of transfers to this coro */
247
248 /* coro process data */
249 int prio;
250 SV *except; /* exception to be thrown */
251 SV *rouse_cb; /* last rouse callback */
252 AV *on_destroy; /* callbacks or coros to notify on destroy */
253 AV *status; /* the exit status list */
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
94}; 272};
95 273
96typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
98 276
99static AV *main_mainstack; /* used to differentiate between $main and others */ 277/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 278/* and get copied between struct coro and these variables */
279/* the main reason we don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** JIT *********************************************************************/
300
301#if CORO_JIT
302 /* APPLE doesn't have HAVE_MMAP though */
303 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
304 #ifndef CORO_JIT_TYPE
305 #if __x86_64 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "amd64-unix"
307 #elif __i386 && CORO_JIT_UNIXY
308 #define CORO_JIT_TYPE "x86-unix"
309 #endif
310 #endif
311#endif
312
313#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
314 #undef CORO_JIT
315#endif
316
317#if CORO_JIT
318 typedef void (*load_save_perl_slots_type)(perl_slots *);
319 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
320#endif
321
322/** Coro::Select ************************************************************/
323
324static OP *(*coro_old_pp_sselect) (pTHX);
101static SV *ucoro_state_sv; 325static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 326
105/* mostly copied from op.c:cv_clone2 */ 327/* horrible hack, but if it works... */
106STATIC AV * 328static OP *
107clone_padlist (AV *protopadlist) 329coro_pp_sselect (pTHX)
108{ 330{
109 AV *av; 331 dSP;
110 I32 ix; 332 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 333 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 334 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 335
114 SV **ppad = AvARRAY (protopad); 336 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 337 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 338 PL_op->op_private = 0;
339 return PL_ppaddr [OP_ENTERSUB](aTHX);
340}
341
342/** time stuff **************************************************************/
343
344#ifdef HAS_GETTIMEOFDAY
345
346ecb_inline void
347coro_u2time (pTHX_ UV ret[2])
348{
349 struct timeval tv;
350 gettimeofday (&tv, 0);
351
352 ret [0] = tv.tv_sec;
353 ret [1] = tv.tv_usec;
354}
355
356ecb_inline double
357coro_nvtime (void)
358{
359 struct timeval tv;
360 gettimeofday (&tv, 0);
361
362 return tv.tv_sec + tv.tv_usec * 1e-6;
363}
364
365ecb_inline void
366time_init (pTHX)
367{
368 nvtime = coro_nvtime;
369 u2time = coro_u2time;
370}
371
372#else
373
374ecb_inline void
375time_init (pTHX)
376{
377 SV **svp;
378
379 require_pv ("Time/HiRes.pm");
380
381 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
382
383 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
384 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
385
386 nvtime = INT2PTR (double (*)(), SvIV (*svp));
387
388 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
389 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
390}
391
392#endif
393
394/** lowlevel stuff **********************************************************/
395
396static SV * ecb_noinline
397coro_get_sv (pTHX_ const char *name, int create)
398{
399#if PERL_VERSION_ATLEAST (5,10,0)
400 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
401 get_sv (name, create);
402#endif
403 return get_sv (name, create);
404}
405
406static AV * ecb_noinline
407coro_get_av (pTHX_ const char *name, int create)
408{
409#if PERL_VERSION_ATLEAST (5,10,0)
410 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
411 get_av (name, create);
412#endif
413 return get_av (name, create);
414}
415
416static HV * ecb_noinline
417coro_get_hv (pTHX_ const char *name, int create)
418{
419#if PERL_VERSION_ATLEAST (5,10,0)
420 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
421 get_hv (name, create);
422#endif
423 return get_hv (name, create);
424}
425
426ecb_inline void
427coro_times_update (void)
428{
429#ifdef coro_clock_gettime
430 struct timespec ts;
431
432 ts.tv_sec = ts.tv_nsec = 0;
433 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
434 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
435
436 ts.tv_sec = ts.tv_nsec = 0;
437 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
438 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
439#else
440 dTHX;
441 UV tv[2];
442
443 u2time (aTHX_ tv);
444 time_real [0] = tv [0];
445 time_real [1] = tv [1] * 1000;
446#endif
447}
448
449ecb_inline void
450coro_times_add (struct coro *c)
451{
452 c->t_real [1] += time_real [1];
453 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
454 c->t_real [0] += time_real [0];
455
456 c->t_cpu [1] += time_cpu [1];
457 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
458 c->t_cpu [0] += time_cpu [0];
459}
460
461ecb_inline void
462coro_times_sub (struct coro *c)
463{
464 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
465 c->t_real [1] -= time_real [1];
466 c->t_real [0] -= time_real [0];
467
468 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
469 c->t_cpu [1] -= time_cpu [1];
470 c->t_cpu [0] -= time_cpu [0];
471}
472
473/*****************************************************************************/
474/* magic glue */
475
476#define CORO_MAGIC_type_cv 26
477#define CORO_MAGIC_type_state PERL_MAGIC_ext
478
479#define CORO_MAGIC_NN(sv, type) \
480 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
481 ? SvMAGIC (sv) \
482 : mg_find (sv, type))
483
484#define CORO_MAGIC(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)) \
486 ? CORO_MAGIC_NN (sv, type) \
487 : 0)
488
489#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
490#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
491
492ecb_inline MAGIC *
493SvSTATEhv_p (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (ecb_expect_true (
498 SvTYPE (coro) == SVt_PVHV
499 && (mg = CORO_MAGIC_state (coro))
500 && mg->mg_virtual == &coro_state_vtbl
501 ))
502 return mg;
503
504 return 0;
505}
506
507ecb_inline struct coro *
508SvSTATE_ (pTHX_ SV *coro)
509{
510 MAGIC *mg;
511
512 if (SvROK (coro))
513 coro = SvRV (coro);
514
515 mg = SvSTATEhv_p (aTHX_ coro);
516 if (!mg)
517 croak ("Coro::State object required");
518
519 return (struct coro *)mg->mg_ptr;
520}
521
522#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
523
524/* faster than SvSTATE, but expects a coroutine hv */
525#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
526#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
527
528/*****************************************************************************/
529/* padlist management and caching */
530
531ecb_inline AV *
532coro_derive_padlist (pTHX_ CV *cv)
533{
534 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 535 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 536
128 newpadlist = newAV (); 537 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 538 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
541#else
542 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
543#endif
544 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
545 --AvFILLp (padlist);
546
547 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 548 av_store (newpadlist, 1, (SV *)newpad);
132 549
133 av = newAV (); /* will be @_ */ 550 return newpadlist;
134 av_extend (av, 0); 551}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 552
138 for (ix = fpad; ix > 0; ix--) 553ecb_inline void
554free_padlist (pTHX_ AV *padlist)
555{
556 /* may be during global destruction */
557 if (!IN_DESTRUCT)
139 { 558 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 559 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 560
561 while (i > 0) /* special-case index 0 */
142 { 562 {
143 char *name = SvPVX (namesv); /* XXX */ 563 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 564 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 565 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 566
147 } 567 while (j >= 0)
148 else 568 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 569
150 SV *sv; 570 AvFILLp (av) = -1;
151 if (*name == '&') 571 SvREFCNT_dec (av);
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 } 572 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175 573
176#if 0 /* return -ENOTUNDERSTOOD */ 574 SvREFCNT_dec (AvARRAY (padlist)[0]);
177 /* Now that vars are all in place, clone nested closures. */
178 575
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist); 576 AvFILLp (padlist) = -1;
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist); 577 SvREFCNT_dec ((SV*)padlist);
578 }
579}
580
581static int
582coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
583{
584 AV *padlist;
585 AV *av = (AV *)mg->mg_obj;
586
587 /* perl manages to free our internal AV and _then_ call us */
588 if (IN_DESTRUCT)
589 return 0;
590
591 /* casting is fun. */
592 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
593 free_padlist (aTHX_ padlist);
594
595 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
596
597 return 0;
598}
599
600static MGVTBL coro_cv_vtbl = {
601 0, 0, 0, 0,
602 coro_cv_free
603};
604
605/* the next two functions merely cache the padlists */
606ecb_inline void
607get_padlist (pTHX_ CV *cv)
608{
609 MAGIC *mg = CORO_MAGIC_cv (cv);
610 AV *av;
611
612 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
613 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
614 else
615 {
616#if CORO_PREFER_PERL_FUNCTIONS
617 /* this is probably cleaner? but also slower! */
618 /* in practise, it seems to be less stable */
619 CV *cp = Perl_cv_clone (aTHX_ cv);
620 CvPADLIST (cv) = CvPADLIST (cp);
621 CvPADLIST (cp) = 0;
622 SvREFCNT_dec (cp);
623#else
624 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
625#endif
626 }
627}
628
629ecb_inline void
630put_padlist (pTHX_ CV *cv)
631{
632 MAGIC *mg = CORO_MAGIC_cv (cv);
633 AV *av;
634
635 if (ecb_expect_false (!mg))
636 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
637
638 av = (AV *)mg->mg_obj;
639
640 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
641 av_extend (av, AvFILLp (av) + 1);
642
643 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
644}
645
646/** load & save, init *******************************************************/
647
648ecb_inline void
649swap_sv (SV *a, SV *b)
650{
651 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
652 SV tmp;
653
654 /* swap sv_any */
655 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
656
657 /* swap sv_flags */
658 SvFLAGS (&tmp) = SvFLAGS (a);
659 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
660 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
661
662#if PERL_VERSION_ATLEAST (5,10,0)
663 /* perl 5.10 and later complicates this _quite_ a bit, but it also
664 * is much faster, so no quarrels here. alternatively, we could
665 * sv_upgrade to avoid this.
666 */
667 {
668 /* swap sv_u */
669 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
670
671 /* if SvANY points to the head, we need to adjust the pointers,
672 * as the pointer for a still points to b, and maybe vice versa.
673 */
674 #define svany_in_head(type) \
675 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
676
677 if (svany_in_head (SvTYPE (a)))
678 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
679
680 if (svany_in_head (SvTYPE (b)))
681 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
216 } 682 }
217}
218#endif 683#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230} 684}
231 685
232STATIC void 686/* swap sv heads, at least logically */
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void 687static void
688swap_svs (pTHX_ Coro__State c)
689{
690 int i;
691
692 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
693 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
694}
695
696#define SWAP_SVS(coro) \
697 if (ecb_expect_false ((coro)->swap_sv)) \
698 swap_svs (aTHX_ (coro))
699
700static void
701on_enterleave_call (pTHX_ SV *cb);
702
703static void
281load_state(pTHX_ Coro__State c) 704load_perl (pTHX_ Coro__State c)
282{ 705{
283 PL_dowarn = c->dowarn; 706 perl_slots *slot = c->slot;
284 PL_in_eval = c->in_eval; 707 c->slot = 0;
285 708
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 709 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 710
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 711#if CORO_JIT
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 712 load_perl_slots (slot);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 713#else
714 #define VARx(name,expr,type) expr = slot->name;
715 # include "state.h"
716 #undef VARx
717#endif
316 718
317 { 719 {
318 dSP; 720 dSP;
721
319 CV *cv; 722 CV *cv;
320 723
321 /* now do the ugly restore mess */ 724 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 725 while (ecb_expect_true (cv = (CV *)POPs))
323 { 726 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 727 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 728 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 729 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 730 }
337 731
338 PUTBACK; 732 PUTBACK;
339 } 733 }
340}
341 734
735 slf_frame = c->slf_frame;
736 CORO_THROW = c->except;
737
738 if (ecb_expect_false (enable_times))
739 {
740 if (ecb_expect_false (!times_valid))
741 coro_times_update ();
742
743 coro_times_sub (c);
744 }
745
746 if (ecb_expect_false (c->on_enter))
747 {
748 int i;
749
750 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
751 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
752 }
753
754 SWAP_SVS (c);
755}
756
342static void 757static void
343save_state(pTHX_ Coro__State c, int flags) 758save_perl (pTHX_ Coro__State c)
344{ 759{
760 SWAP_SVS (c);
761
762 if (ecb_expect_false (c->on_leave))
763 {
764 int i;
765
766 for (i = AvFILLp (c->on_leave); i >= 0; --i)
767 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
768 }
769
770 times_valid = 0;
771
772 if (ecb_expect_false (enable_times))
773 {
774 coro_times_update (); times_valid = 1;
775 coro_times_add (c);
776 }
777
778 c->except = CORO_THROW;
779 c->slf_frame = slf_frame;
780
345 { 781 {
346 dSP; 782 dSP;
347 I32 cxix = cxstack_ix; 783 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 784 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 785 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 787 /*
352 * the worst thing you can imagine happens first - we have to save 788 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 789 * (and reinitialize) all cv's in the whole callchain :(
354 */ 790 */
355 791
356 PUSHs (Nullsv); 792 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 793 /* this loop was inspired by pp_caller */
358 for (;;) 794 for (;;)
359 { 795 {
360 while (cxix >= 0) 796 while (ecb_expect_true (cxix >= 0))
361 { 797 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 798 PERL_CONTEXT *cx = &ccstk[cxix--];
363 799
364 if (CxTYPE(cx) == CXt_SUB) 800 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 801 {
366 CV *cv = cx->blk_sub.cv; 802 CV *cv = cx->blk_sub.cv;
803
367 if (CvDEPTH(cv)) 804 if (ecb_expect_true (CvDEPTH (cv)))
368 { 805 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 806 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 807 PUSHs ((SV *)CvPADLIST (cv));
808 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 809 PUSHs ((SV *)cv);
385 810
386 get_padlist (cv); /* this is a monster */ 811 CvDEPTH (cv) = 0;
812 get_padlist (aTHX_ cv);
387 } 813 }
388 } 814 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 815 }
396 816
397 if (top_si->si_type == PERLSI_MAIN) 817 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
398 break; 818 break;
399 819
400 top_si = top_si->si_prev; 820 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack; 821 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix; 822 cxix = top_si->si_cxix;
403 } 823 }
404 824
405 PUTBACK; 825 PUTBACK;
406 } 826 }
407 827
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 828 /* allocate some space on the context stack for our purposes */
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 829 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 830 {
831 unsigned int i;
411 832
412 c->dowarn = PL_dowarn; 833 for (i = 0; i < SLOT_COUNT; ++i)
413 c->in_eval = PL_in_eval; 834 CXINC;
414 835
415 c->curstackinfo = PL_curstackinfo; 836 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 c->curstack = PL_curstack; 837 }
838
417 c->mainstack = PL_mainstack; 839 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp; 840
419 c->op = PL_op; 841 {
420 c->curpad = PL_curpad; 842 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
421 c->stack_base = PL_stack_base; 843
422 c->stack_max = PL_stack_max; 844#if CORO_JIT
423 c->tmps_stack = PL_tmps_stack; 845 save_perl_slots (slot);
424 c->tmps_floor = PL_tmps_floor; 846#else
425 c->tmps_ix = PL_tmps_ix; 847 #define VARx(name,expr,type) slot->name = expr;
426 c->tmps_max = PL_tmps_max; 848 # include "state.h"
427 c->markstack = PL_markstack; 849 #undef VARx
428 c->markstack_ptr = PL_markstack_ptr; 850#endif
429 c->markstack_max = PL_markstack_max; 851 }
430 c->scopestack = PL_scopestack;
431 c->scopestack_ix = PL_scopestack_ix;
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441} 852}
442 853
443/* 854/*
444 * allocate various perl stacks. This is an exact copy 855 * allocate various perl stacks. This is almost an exact copy
445 * of perl.c:init_stacks, except that it uses less memory 856 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need 857 * on the (sometimes correct) assumption that coroutines do
447 * a lot of stackspace. 858 * not usually need a lot of stackspace.
448 */ 859 */
449STATIC void 860#if CORO_PREFER_PERL_FUNCTIONS
861# define coro_init_stacks(thx) init_stacks ()
862#else
863static void
450coro_init_stacks (pTHX) 864coro_init_stacks (pTHX)
451{ 865{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 866 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
453 PL_curstackinfo->si_type = PERLSI_MAIN; 867 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack; 868 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 869 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456 870
457 PL_stack_base = AvARRAY(PL_curstack); 871 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base; 872 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 873 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460 874
461 New(50,PL_tmps_stack,96,SV*); 875 New(50,PL_tmps_stack,32,SV*);
462 PL_tmps_floor = -1; 876 PL_tmps_floor = -1;
463 PL_tmps_ix = -1; 877 PL_tmps_ix = -1;
464 PL_tmps_max = 96; 878 PL_tmps_max = 32;
465 879
466 New(54,PL_markstack,16,I32); 880 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack; 881 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16; 882 PL_markstack_max = PL_markstack + 16;
469 883
884#ifdef SET_MARK_OFFSET
470 SET_MARK_OFFSET; 885 SET_MARK_OFFSET;
886#endif
471 887
472 New(54,PL_scopestack,16,I32); 888 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 889 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 890 PL_scopestack_max = 8;
891#if HAS_SCOPESTACK_NAME
892 New(54,PL_scopestack_name,8,const char*);
893#endif
475 894
476 New(54,PL_savestack,96,ANY); 895 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 896 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 897 PL_savestack_max = 24;
479 898
899#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 900 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 901 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 902 PL_retstack_max = 4;
903#endif
483} 904}
905#endif
484 906
485/* 907/*
486 * destroy the stacks, the callchain etc... 908 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */ 909 */
489STATIC void 910static void
490destroy_stacks(pTHX) 911coro_destruct_stacks (pTHX)
491{ 912{
492 int destruct = PL_main_cv != Nullcv;
493
494 if (destruct)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next) 913 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 914 PL_curstackinfo = PL_curstackinfo->si_next;
507 915
508 while (PL_curstackinfo) 916 while (PL_curstackinfo)
509 { 917 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 918 PERL_SI *p = PL_curstackinfo->si_prev;
511 919
512 { 920 if (!IN_DESTRUCT)
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (destruct)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 921 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 922
524 Safefree(PL_curstackinfo->si_cxstack); 923 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 924 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 925 PL_curstackinfo = p;
527 } 926 }
528 927
529 Safefree(PL_tmps_stack); 928 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 929 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 930 Safefree (PL_scopestack);
931#if HAS_SCOPESTACK_NAME
932 Safefree (PL_scopestack_name);
933#endif
532 Safefree(PL_savestack); 934 Safefree (PL_savestack);
935#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree(PL_retstack); 936 Safefree (PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif 937#endif
938}
939
940#define CORO_RSS \
941 rss += sizeof (SYM (curstackinfo)); \
942 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
943 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
944 rss += SYM (tmps_max) * sizeof (SV *); \
945 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
946 rss += SYM (scopestack_max) * sizeof (I32); \
947 rss += SYM (savestack_max) * sizeof (ANY);
948
949static size_t
950coro_rss (pTHX_ struct coro *coro)
951{
952 size_t rss = sizeof (*coro);
953
954 if (coro->mainstack)
955 {
956 if (coro->flags & CF_RUNNING)
553 { 957 {
554 /*FIXME*//*D*//* reasonable stack size! */ 958 #define SYM(sym) PL_ ## sym
555 stack->ssize = -4096 * sizeof (long); 959 CORO_RSS;
556 New (0, stack->sptr, 4096, long); 960 #undef SYM
557 } 961 }
558 }
559 else 962 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 { 963 {
576#ifdef HAVE_MMAP 964 #define SYM(sym) coro->slot->sym
577 if (stack->ssize > 0 && stack->sptr) 965 CORO_RSS;
578 munmap (stack->sptr, stack->ssize); 966 #undef SYM
967 }
968 }
969
970 return rss;
971}
972
973/** coroutine stack handling ************************************************/
974
975static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
976static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
977static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
978
979/* apparently < 5.8.8 */
980#ifndef MgPV_nolen_const
981#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
982 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
983 (const char*)(mg)->mg_ptr)
984#endif
985
986/*
987 * This overrides the default magic get method of %SIG elements.
988 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
989 * and instead of trying to save and restore the hash elements (extremely slow),
990 * we just provide our own readback here.
991 */
992static int ecb_cold
993coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
994{
995 const char *s = MgPV_nolen_const (mg);
996
997 if (*s == '_')
998 {
999 SV **svp = 0;
1000
1001 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1002 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1003
1004 if (svp)
1005 {
1006 SV *ssv;
1007
1008 if (!*svp)
1009 ssv = &PL_sv_undef;
1010 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1011 ssv = sv_2mortal (newRV_inc (*svp));
579 else 1012 else
580#else 1013 ssv = *svp;
581 Safefree (stack->sptr); 1014
582#endif 1015 sv_setsv (sv, ssv);
583 Safefree (stack); 1016 return 0;
584 } 1017 }
585 else if (ctx->gencnt == stack->gencnt) 1018 }
586 --stack->usecnt; 1019
1020 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1021}
1022
1023static int ecb_cold
1024coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1025{
1026 const char *s = MgPV_nolen_const (mg);
1027
1028 if (*s == '_')
587 } 1029 {
588} 1030 SV **svp = 0;
589 1031
1032 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1033 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1034
1035 if (svp)
1036 {
1037 SV *old = *svp;
1038 *svp = 0;
1039 SvREFCNT_dec (old);
1040 return 0;
1041 }
1042 }
1043
1044 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1045}
1046
1047static int ecb_cold
1048coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1049{
1050 const char *s = MgPV_nolen_const (mg);
1051
1052 if (*s == '_')
1053 {
1054 SV **svp = 0;
1055
1056 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1057 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1058
1059 if (svp)
1060 {
1061 SV *old = *svp;
1062 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1063 SvREFCNT_dec (old);
1064 return 0;
1065 }
1066 }
1067
1068 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1069}
1070
1071static void
1072prepare_nop (pTHX_ struct coro_transfer_args *ta)
1073{
1074 /* kind of mega-hacky, but works */
1075 ta->next = ta->prev = (struct coro *)ta;
1076}
1077
590static void 1078static int
591setup_coro (void *arg) 1079slf_check_nop (pTHX_ struct CoroSLF *frame)
1080{
1081 return 0;
1082}
1083
1084static int
1085slf_check_repeat (pTHX_ struct CoroSLF *frame)
1086{
1087 return 1;
1088}
1089
1090static UNOP init_perl_op;
1091
1092ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1093init_perl (pTHX_ struct coro *coro)
592{ 1094{
593 /* 1095 /*
594 * emulate part of the perl startup here. 1096 * emulate part of the perl startup here.
595 */ 1097 */
1098 coro_init_stacks (aTHX);
1099
1100 PL_runops = RUNOPS_DEFAULT;
1101 PL_curcop = &PL_compiling;
1102 PL_in_eval = EVAL_NULL;
1103 PL_comppad = 0;
1104 PL_comppad_name = 0;
1105 PL_comppad_name_fill = 0;
1106 PL_comppad_name_floor = 0;
1107 PL_curpm = 0;
1108 PL_curpad = 0;
1109 PL_localizing = 0;
1110 PL_restartop = 0;
1111#if PERL_VERSION_ATLEAST (5,10,0)
1112 PL_parser = 0;
1113#endif
1114 PL_hints = 0;
1115
1116 /* recreate the die/warn hooks */
1117 PL_diehook = SvREFCNT_inc (rv_diehook);
1118 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1119
1120 GvSV (PL_defgv) = newSV (0);
1121 GvAV (PL_defgv) = coro->args; coro->args = 0;
1122 GvSV (PL_errgv) = newSV (0);
1123 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1124 GvHV (PL_hintgv) = 0;
1125 PL_rs = newSVsv (GvSV (irsgv));
1126 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1127
1128 {
1129 dSP;
1130 UNOP myop;
1131
1132 Zero (&myop, 1, UNOP);
1133 myop.op_next = Nullop;
1134 myop.op_type = OP_ENTERSUB;
1135 myop.op_flags = OPf_WANT_VOID;
1136
1137 PUSHMARK (SP);
1138 PUSHs ((SV *)coro->startcv);
1139 PUTBACK;
1140 PL_op = (OP *)&myop;
1141 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1142 }
1143
1144 /* this newly created coroutine might be run on an existing cctx which most
1145 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1146 */
1147 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1148 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1149 slf_frame.destroy = 0;
1150
1151 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1152 init_perl_op.op_next = PL_op;
1153 init_perl_op.op_type = OP_ENTERSUB;
1154 init_perl_op.op_ppaddr = pp_slf;
1155 /* no flags etc. required, as an init function won't be called */
1156
1157 PL_op = (OP *)&init_perl_op;
1158
1159 /* copy throw, in case it was set before init_perl */
1160 CORO_THROW = coro->except;
1161
1162 SWAP_SVS (coro);
1163
1164 if (ecb_expect_false (enable_times))
1165 {
1166 coro_times_update ();
1167 coro_times_sub (coro);
1168 }
1169}
1170
1171static void
1172coro_unwind_stacks (pTHX)
1173{
1174 if (!IN_DESTRUCT)
1175 {
1176 /* restore all saved variables and stuff */
1177 LEAVE_SCOPE (0);
1178 assert (PL_tmps_floor == -1);
1179
1180 /* free all temporaries */
1181 FREETMPS;
1182 assert (PL_tmps_ix == -1);
1183
1184 /* unwind all extra stacks */
1185 POPSTACK_TO (PL_mainstack);
1186
1187 /* unwind main stack */
1188 dounwind (-1);
1189 }
1190}
1191
1192static void
1193destroy_perl (pTHX_ struct coro *coro)
1194{
1195 SV *svf [9];
1196
1197 {
1198 SV *old_current = SvRV (coro_current);
1199 struct coro *current = SvSTATE (old_current);
1200
1201 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1202
1203 save_perl (aTHX_ current);
1204
1205 /* this will cause transfer_check to croak on block*/
1206 SvRV_set (coro_current, (SV *)coro->hv);
1207
1208 load_perl (aTHX_ coro);
1209
1210 coro_unwind_stacks (aTHX);
1211
1212 /* restore swapped sv's */
1213 SWAP_SVS (coro);
1214
1215 coro_destruct_stacks (aTHX);
1216
1217 /* now save some sv's to be free'd later */
1218 svf [0] = GvSV (PL_defgv);
1219 svf [1] = (SV *)GvAV (PL_defgv);
1220 svf [2] = GvSV (PL_errgv);
1221 svf [3] = (SV *)PL_defoutgv;
1222 svf [4] = PL_rs;
1223 svf [5] = GvSV (irsgv);
1224 svf [6] = (SV *)GvHV (PL_hintgv);
1225 svf [7] = PL_diehook;
1226 svf [8] = PL_warnhook;
1227 assert (9 == sizeof (svf) / sizeof (*svf));
1228
1229 SvRV_set (coro_current, old_current);
1230
1231 load_perl (aTHX_ current);
1232 }
1233
1234 {
1235 unsigned int i;
1236
1237 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1238 SvREFCNT_dec (svf [i]);
1239
1240 SvREFCNT_dec (coro->saved_deffh);
1241 SvREFCNT_dec (coro->rouse_cb);
1242 SvREFCNT_dec (coro->invoke_cb);
1243 SvREFCNT_dec (coro->invoke_av);
1244 }
1245}
1246
1247ecb_inline void
1248free_coro_mortal (pTHX)
1249{
1250 if (ecb_expect_true (coro_mortal))
1251 {
1252 SvREFCNT_dec ((SV *)coro_mortal);
1253 coro_mortal = 0;
1254 }
1255}
1256
1257static int
1258runops_trace (pTHX)
1259{
1260 COP *oldcop = 0;
1261 int oldcxix = -2;
1262
1263 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1264 {
1265 PERL_ASYNC_CHECK ();
1266
1267 if (cctx_current->flags & CC_TRACE_ALL)
1268 {
1269 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1270 {
1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1272 SV **bot, **top;
1273 AV *av = newAV (); /* return values */
1274 SV **cb;
1275 dSP;
1276
1277 GV *gv = CvGV (cx->blk_sub.cv);
1278 SV *fullname = sv_2mortal (newSV (0));
1279 if (isGV (gv))
1280 gv_efullname3 (fullname, gv, 0);
1281
1282 bot = PL_stack_base + cx->blk_oldsp + 1;
1283 top = cx->blk_gimme == G_ARRAY ? SP + 1
1284 : cx->blk_gimme == G_SCALAR ? bot + 1
1285 : bot;
1286
1287 av_extend (av, top - bot);
1288 while (bot < top)
1289 av_push (av, SvREFCNT_inc_NN (*bot++));
1290
1291 PL_runops = RUNOPS_DEFAULT;
1292 ENTER;
1293 SAVETMPS;
1294 EXTEND (SP, 3);
1295 PUSHMARK (SP);
1296 PUSHs (&PL_sv_no);
1297 PUSHs (fullname);
1298 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1299 PUTBACK;
1300 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1301 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1302 SPAGAIN;
1303 FREETMPS;
1304 LEAVE;
1305 PL_runops = runops_trace;
1306 }
1307
1308 if (oldcop != PL_curcop)
1309 {
1310 oldcop = PL_curcop;
1311
1312 if (PL_curcop != &PL_compiling)
1313 {
1314 SV **cb;
1315
1316 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1317 {
1318 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1319
1320 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1321 {
1322 dSP;
1323 GV *gv = CvGV (cx->blk_sub.cv);
1324 SV *fullname = sv_2mortal (newSV (0));
1325
1326 if (isGV (gv))
1327 gv_efullname3 (fullname, gv, 0);
1328
1329 PL_runops = RUNOPS_DEFAULT;
1330 ENTER;
1331 SAVETMPS;
1332 EXTEND (SP, 3);
1333 PUSHMARK (SP);
1334 PUSHs (&PL_sv_yes);
1335 PUSHs (fullname);
1336 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1337 PUTBACK;
1338 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1339 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1340 SPAGAIN;
1341 FREETMPS;
1342 LEAVE;
1343 PL_runops = runops_trace;
1344 }
1345
1346 oldcxix = cxstack_ix;
1347 }
1348
1349 if (cctx_current->flags & CC_TRACE_LINE)
1350 {
1351 dSP;
1352
1353 PL_runops = RUNOPS_DEFAULT;
1354 ENTER;
1355 SAVETMPS;
1356 EXTEND (SP, 3);
1357 PL_runops = RUNOPS_DEFAULT;
1358 PUSHMARK (SP);
1359 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1360 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1361 PUTBACK;
1362 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1363 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1364 SPAGAIN;
1365 FREETMPS;
1366 LEAVE;
1367 PL_runops = runops_trace;
1368 }
1369 }
1370 }
1371 }
1372 }
1373
1374 TAINT_NOT;
1375 return 0;
1376}
1377
1378static struct CoroSLF cctx_ssl_frame;
1379
1380static void
1381slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1382{
1383 ta->prev = 0;
1384}
1385
1386static int
1387slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1388{
1389 *frame = cctx_ssl_frame;
1390
1391 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1392}
1393
1394/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1395static void ecb_noinline
1396cctx_prepare (pTHX)
1397{
1398 PL_top_env = &PL_start_env;
1399
1400 if (cctx_current->flags & CC_TRACE)
1401 PL_runops = runops_trace;
1402
1403 /* we already must be executing an SLF op, there is no other valid way
1404 * that can lead to creation of a new cctx */
1405 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1406 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1407
1408 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1409 cctx_ssl_frame = slf_frame;
1410
1411 slf_frame.prepare = slf_prepare_set_stacklevel;
1412 slf_frame.check = slf_check_set_stacklevel;
1413}
1414
1415/* try to exit the same way perl's main function would do */
1416/* we do not bother resetting the environment or other things *7
1417/* that are not, uhm, essential */
1418/* this obviously also doesn't work when perl is embedded */
1419static void ecb_noinline ecb_cold
1420perlish_exit (void)
1421{
1422 int exitstatus = perl_destruct (PL_curinterp);
1423 perl_free (PL_curinterp);
1424 exit (exitstatus);
1425}
1426
1427/* the tail of transfer: execute stuff we can only do after a transfer */
1428ecb_inline void
1429transfer_tail (pTHX)
1430{
1431 free_coro_mortal (aTHX);
1432}
1433
1434/*
1435 * this is a _very_ stripped down perl interpreter ;)
1436 */
1437static void
1438cctx_run (void *arg)
1439{
1440#ifdef USE_ITHREADS
1441# if CORO_PTHREAD
1442 PERL_SET_CONTEXT (coro_thx);
1443# endif
1444#endif
1445 {
1446 dTHX;
1447
1448 /* normally we would need to skip the entersub here */
1449 /* not doing so will re-execute it, which is exactly what we want */
1450 /* PL_nop = PL_nop->op_next */
1451
1452 /* inject a fake subroutine call to cctx_init */
1453 cctx_prepare (aTHX);
1454
1455 /* cctx_run is the alternative tail of transfer() */
1456 transfer_tail (aTHX);
1457
1458 /* somebody or something will hit me for both perl_run and PL_restartop */
1459 PL_restartop = PL_op;
1460 perl_run (PL_curinterp);
1461 /*
1462 * Unfortunately, there is no way to get at the return values of the
1463 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1464 * runtime errors here, as this is just a random interpreter, not a thread.
1465 */
1466
1467 /*
1468 * If perl-run returns we assume exit() was being called or the coro
1469 * fell off the end, which seems to be the only valid (non-bug)
1470 * reason for perl_run to return. We try to mimic whatever perl is normally
1471 * doing in that case. YMMV.
1472 */
1473 perlish_exit ();
1474 }
1475}
1476
1477static coro_cctx *
1478cctx_new (void)
1479{
1480 coro_cctx *cctx;
1481
1482 ++cctx_count;
1483 New (0, cctx, 1, coro_cctx);
1484
1485 cctx->gen = cctx_gen;
1486 cctx->flags = 0;
1487 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1488
1489 return cctx;
1490}
1491
1492/* create a new cctx only suitable as source */
1493static coro_cctx *
1494cctx_new_empty (void)
1495{
1496 coro_cctx *cctx = cctx_new ();
1497
1498 cctx->sptr = 0;
1499 coro_create (&cctx->cctx, 0, 0, 0, 0);
1500
1501 return cctx;
1502}
1503
1504/* create a new cctx suitable as destination/running a perl interpreter */
1505static coro_cctx *
1506cctx_new_run (void)
1507{
1508 coro_cctx *cctx = cctx_new ();
1509 void *stack_start;
1510 size_t stack_size;
1511
1512#if HAVE_MMAP
1513 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1514 /* mmap supposedly does allocate-on-write for us */
1515 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
1516
1517 if (cctx->sptr != (void *)-1)
1518 {
1519 #if CORO_STACKGUARD
1520 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1521 #endif
1522 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1523 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1524 cctx->flags |= CC_MAPPED;
1525 }
1526 else
1527#endif
1528 {
1529 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1530 New (0, cctx->sptr, cctx_stacksize, long);
1531
1532 if (!cctx->sptr)
1533 {
1534 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1535 _exit (EXIT_FAILURE);
1536 }
1537
1538 stack_start = cctx->sptr;
1539 stack_size = cctx->ssize;
1540 }
1541
1542 #if CORO_USE_VALGRIND
1543 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1544 #endif
1545
1546 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1547
1548 return cctx;
1549}
1550
1551static void
1552cctx_destroy (coro_cctx *cctx)
1553{
1554 if (!cctx)
1555 return;
1556
1557 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1558
1559 --cctx_count;
1560 coro_destroy (&cctx->cctx);
1561
1562 /* coro_transfer creates new, empty cctx's */
1563 if (cctx->sptr)
1564 {
1565 #if CORO_USE_VALGRIND
1566 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1567 #endif
1568
1569#if HAVE_MMAP
1570 if (cctx->flags & CC_MAPPED)
1571 munmap (cctx->sptr, cctx->ssize);
1572 else
1573#endif
1574 Safefree (cctx->sptr);
1575 }
1576
1577 Safefree (cctx);
1578}
1579
1580/* wether this cctx should be destructed */
1581#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1582
1583static coro_cctx *
1584cctx_get (pTHX)
1585{
1586 while (ecb_expect_true (cctx_first))
1587 {
1588 coro_cctx *cctx = cctx_first;
1589 cctx_first = cctx->next;
1590 --cctx_idle;
1591
1592 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1593 return cctx;
1594
1595 cctx_destroy (cctx);
1596 }
1597
1598 return cctx_new_run ();
1599}
1600
1601static void
1602cctx_put (coro_cctx *cctx)
1603{
1604 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1605
1606 /* free another cctx if overlimit */
1607 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1608 {
1609 coro_cctx *first = cctx_first;
1610 cctx_first = first->next;
1611 --cctx_idle;
1612
1613 cctx_destroy (first);
1614 }
1615
1616 ++cctx_idle;
1617 cctx->next = cctx_first;
1618 cctx_first = cctx;
1619}
1620
1621/** coroutine switching *****************************************************/
1622
1623static void
1624transfer_check (pTHX_ struct coro *prev, struct coro *next)
1625{
1626 /* TODO: throwing up here is considered harmful */
1627
1628 if (ecb_expect_true (prev != next))
1629 {
1630 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1631 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1632
1633 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1634 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1635
1636#if !PERL_VERSION_ATLEAST (5,10,0)
1637 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1638 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1639#endif
1640 }
1641}
1642
1643/* always use the TRANSFER macro */
1644static void ecb_noinline /* noinline so we have a fixed stackframe */
1645transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1646{
1647 dSTACKLEVEL;
1648
1649 /* sometimes transfer is only called to set idle_sp */
1650 if (ecb_expect_false (!prev))
1651 {
1652 cctx_current->idle_sp = STACKLEVEL;
1653 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1654 }
1655 else if (ecb_expect_true (prev != next))
1656 {
1657 coro_cctx *cctx_prev;
1658
1659 if (ecb_expect_false (prev->flags & CF_NEW))
1660 {
1661 /* create a new empty/source context */
1662 prev->flags &= ~CF_NEW;
1663 prev->flags |= CF_RUNNING;
1664 }
1665
1666 prev->flags &= ~CF_RUNNING;
1667 next->flags |= CF_RUNNING;
1668
1669 /* first get rid of the old state */
1670 save_perl (aTHX_ prev);
1671
1672 if (ecb_expect_false (next->flags & CF_NEW))
1673 {
1674 /* need to start coroutine */
1675 next->flags &= ~CF_NEW;
1676 /* setup coroutine call */
1677 init_perl (aTHX_ next);
1678 }
1679 else
1680 load_perl (aTHX_ next);
1681
1682 /* possibly untie and reuse the cctx */
1683 if (ecb_expect_true (
1684 cctx_current->idle_sp == STACKLEVEL
1685 && !(cctx_current->flags & CC_TRACE)
1686 && !force_cctx
1687 ))
1688 {
1689 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1690 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1691
1692 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1693 /* without this the next cctx_get might destroy the running cctx while still in use */
1694 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1695 if (ecb_expect_true (!next->cctx))
1696 next->cctx = cctx_get (aTHX);
1697
1698 cctx_put (cctx_current);
1699 }
1700 else
1701 prev->cctx = cctx_current;
1702
1703 ++next->usecount;
1704
1705 cctx_prev = cctx_current;
1706 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1707
1708 next->cctx = 0;
1709
1710 if (ecb_expect_false (cctx_prev != cctx_current))
1711 {
1712 cctx_prev->top_env = PL_top_env;
1713 PL_top_env = cctx_current->top_env;
1714 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1715 }
1716
1717 transfer_tail (aTHX);
1718 }
1719}
1720
1721#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1722#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1723
1724/** high level stuff ********************************************************/
1725
1726/* this function is actually Coro, not Coro::State, but we call it from here */
1727/* because it is convenient - but it hasn't been declared yet for that reason */
1728static void
1729coro_call_on_destroy (pTHX_ struct coro *coro);
1730
1731static void
1732coro_state_destroy (pTHX_ struct coro *coro)
1733{
1734 if (coro->flags & CF_ZOMBIE)
1735 return;
1736
1737 slf_destroy (aTHX_ coro);
1738
1739 coro->flags |= CF_ZOMBIE;
1740
1741 if (coro->flags & CF_READY)
1742 {
1743 /* reduce nready, as destroying a ready coro effectively unreadies it */
1744 /* alternative: look through all ready queues and remove the coro */
1745 --coro_nready;
1746 }
1747 else
1748 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1749
1750 if (coro->next) coro->next->prev = coro->prev;
1751 if (coro->prev) coro->prev->next = coro->next;
1752 if (coro == coro_first) coro_first = coro->next;
1753
1754 if (coro->mainstack
1755 && coro->mainstack != main_mainstack
1756 && coro->slot
1757 && !PL_dirty)
1758 destroy_perl (aTHX_ coro);
1759
1760 cctx_destroy (coro->cctx);
1761 SvREFCNT_dec (coro->startcv);
1762 SvREFCNT_dec (coro->args);
1763 SvREFCNT_dec (coro->swap_sv);
1764 SvREFCNT_dec (CORO_THROW);
1765
1766 coro_call_on_destroy (aTHX_ coro);
1767
1768 /* more destruction mayhem in coro_state_free */
1769}
1770
1771static int
1772coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1773{
1774 struct coro *coro = (struct coro *)mg->mg_ptr;
1775 mg->mg_ptr = 0;
1776
1777 coro_state_destroy (aTHX_ coro);
1778 SvREFCNT_dec (coro->on_destroy);
1779 SvREFCNT_dec (coro->status);
1780
1781 Safefree (coro);
1782
1783 return 0;
1784}
1785
1786static int ecb_cold
1787coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1788{
1789 /* called when perl clones the current process the slow way (windows process emulation) */
1790 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1791 mg->mg_ptr = 0;
1792 mg->mg_virtual = 0;
1793
1794 return 0;
1795}
1796
1797static MGVTBL coro_state_vtbl = {
1798 0, 0, 0, 0,
1799 coro_state_free,
1800 0,
1801#ifdef MGf_DUP
1802 coro_state_dup,
1803#else
1804# define MGf_DUP 0
1805#endif
1806};
1807
1808static void
1809prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1810{
1811 ta->prev = SvSTATE (prev_sv);
1812 ta->next = SvSTATE (next_sv);
1813 TRANSFER_CHECK (*ta);
1814}
1815
1816static void
1817api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1818{
1819 struct coro_transfer_args ta;
1820
1821 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1822 TRANSFER (ta, 1);
1823}
1824
1825/** Coro ********************************************************************/
1826
1827ecb_inline void
1828coro_enq (pTHX_ struct coro *coro)
1829{
1830 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1831
1832 SvREFCNT_inc_NN (coro->hv);
1833
1834 coro->next_ready = 0;
1835 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1836 ready [1] = coro;
1837}
1838
1839ecb_inline struct coro *
1840coro_deq (pTHX)
1841{
1842 int prio;
1843
1844 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1845 {
1846 struct coro **ready = coro_ready [prio];
1847
1848 if (ready [0])
1849 {
1850 struct coro *coro = ready [0];
1851 ready [0] = coro->next_ready;
1852 return coro;
1853 }
1854 }
1855
1856 return 0;
1857}
1858
1859static void
1860invoke_sv_ready_hook_helper (void)
1861{
1862 dTHX;
596 dSP; 1863 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 1864
600 coro_init_stacks (aTHX); 1865 ENTER;
601 /*PL_curcop = 0;*/ 1866 SAVETMPS;
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 1867
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP); 1868 PUSHMARK (SP);
613 PUTBACK; 1869 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1870 call_sv (coro_readyhook, G_VOID | G_DISCARD);
615 1871
616 if (SvTRUE (ERRSV)) 1872 FREETMPS;
617 croak (NULL); 1873 LEAVE;
618 else 1874}
619 croak ("FATAL: CCTXT coroutine returned!"); 1875
1876static int
1877api_ready (pTHX_ SV *coro_sv)
1878{
1879 struct coro *coro = SvSTATE (coro_sv);
1880
1881 if (coro->flags & CF_READY)
1882 return 0;
1883
1884 coro->flags |= CF_READY;
1885
1886 coro_enq (aTHX_ coro);
1887
1888 if (!coro_nready++)
1889 if (coroapi.readyhook)
1890 coroapi.readyhook ();
1891
1892 return 1;
1893}
1894
1895static int
1896api_is_ready (pTHX_ SV *coro_sv)
1897{
1898 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1899}
1900
1901/* expects to own a reference to next->hv */
1902ecb_inline void
1903prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1904{
1905 SV *prev_sv = SvRV (coro_current);
1906
1907 ta->prev = SvSTATE_hv (prev_sv);
1908 ta->next = next;
1909
1910 TRANSFER_CHECK (*ta);
1911
1912 SvRV_set (coro_current, (SV *)next->hv);
1913
1914 free_coro_mortal (aTHX);
1915 coro_mortal = prev_sv;
1916}
1917
1918static void
1919prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1920{
1921 for (;;)
620 } 1922 {
621 else 1923 struct coro *next = coro_deq (aTHX);
622 {
623 UNOP myop;
624 1924
625 PL_op = (OP *)&myop; 1925 if (ecb_expect_true (next))
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 { 1926 {
682 SAVE (prev, flags); 1927 /* cannot transfer to destroyed coros, skip and look for next */
683 LOAD (next); 1928 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
684 1929 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
685 /* mark this state as in-use */ 1930 else
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 1931 {
692 if (!prev->stack) 1932 next->flags &= ~CF_READY;
693 allocate_stack (prev, 0); 1933 --coro_nready;
694 else if (prev->cursp != stacklevel 1934
695 && prev->stack->usecnt > 1) 1935 prepare_schedule_to (aTHX_ ta, next);
696 { 1936 break;
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 } 1937 }
714
715 } 1938 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else 1939 else
719 { 1940 {
720 SAVE (prev, -1); /* first get rid of the old state */ 1941 /* nothing to schedule: call the idle handler */
721 1942 if (SvROK (sv_idle)
722 if (flags & TRANSFER_SAVE_CCTXT) 1943 && SvOBJECT (SvRV (sv_idle)))
723 { 1944 {
724 if (!prev->stack) 1945 if (SvRV (sv_idle) == SvRV (coro_current))
725 allocate_stack (prev, 0); 1946 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
726 1947
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1948 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
728 { 1949 api_ready (aTHX_ SvRV (sv_idle));
729 setup_coro (next); 1950 --coro_nready;
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 } 1951 }
746 else 1952 else
747 setup_coro (next); 1953 {
1954 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1955 dSP;
1956
1957 ENTER;
1958 SAVETMPS;
1959
1960 PUSHMARK (SP);
1961 PUTBACK;
1962 call_sv (sv_idle, G_VOID | G_DISCARD);
1963
1964 FREETMPS;
1965 LEAVE;
1966 }
748 } 1967 }
749 } 1968 }
750
751 /*
752 * xnext is now either prev or next, depending on wether
753 * we switched the c stack or not. that's why i use a global
754 * variable, that should become thread-specific at one point.
755 */
756 xnext->cursp = stacklevel;
757} 1969}
758 1970
759static struct coro * 1971ecb_inline void
760sv_to_coro (SV *arg, const char *funcname, const char *varname) 1972prepare_cede (pTHX_ struct coro_transfer_args *ta)
761{ 1973{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1974 api_ready (aTHX_ coro_current);
763 { 1975 prepare_schedule (aTHX_ ta);
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1976}
765 1977
766 if (!he) 1978ecb_inline void
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1979prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1980{
1981 SV *prev = SvRV (coro_current);
768 1982
769 arg = HeVAL(he); 1983 if (coro_nready)
770 } 1984 {
1985 prepare_schedule (aTHX_ ta);
1986 api_ready (aTHX_ prev);
771 1987 }
772 /* must also be changed inside Coro::Cont::yield */ 1988 else
773 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 1989 prepare_nop (aTHX_ ta);
774 return (struct coro *) SvIV((SV*)SvRV(arg));
775
776 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
777 /*NORETURN*/
778} 1990}
779 1991
1992static void
1993api_schedule (pTHX)
1994{
1995 struct coro_transfer_args ta;
1996
1997 prepare_schedule (aTHX_ &ta);
1998 TRANSFER (ta, 1);
1999}
2000
2001static void
2002api_schedule_to (pTHX_ SV *coro_sv)
2003{
2004 struct coro_transfer_args ta;
2005 struct coro *next = SvSTATE (coro_sv);
2006
2007 SvREFCNT_inc_NN (coro_sv);
2008 prepare_schedule_to (aTHX_ &ta, next);
2009}
2010
780static void 2011static int
781api_transfer(pTHX_ SV *prev, SV *next, int flags) 2012api_cede (pTHX)
782{ 2013{
783 transfer(aTHX_ 2014 struct coro_transfer_args ta;
784 sv_to_coro (prev, "Coro::transfer", "prev"),
785 sv_to_coro (next, "Coro::transfer", "next"),
786 flags);
787}
788 2015
789/** Coro ********************************************************************/ 2016 prepare_cede (aTHX_ &ta);
790 2017
791#define PRIO_MAX 3 2018 if (ecb_expect_true (ta.prev != ta.next))
792#define PRIO_HIGH 1 2019 {
793#define PRIO_NORMAL 0 2020 TRANSFER (ta, 1);
794#define PRIO_LOW -1 2021 return 1;
795#define PRIO_IDLE -3
796#define PRIO_MIN -4
797
798/* for Coro.pm */
799static GV *coro_current, *coro_idle;
800static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
801static int coro_nready;
802
803static void
804coro_enq (SV *sv)
805{
806 if (SvROK (sv))
807 { 2022 }
808 SV *hv = SvRV (sv); 2023 else
809 if (SvTYPE (hv) == SVt_PVHV) 2024 return 0;
2025}
2026
2027static int
2028api_cede_notself (pTHX)
2029{
2030 if (coro_nready)
2031 {
2032 struct coro_transfer_args ta;
2033
2034 prepare_cede_notself (aTHX_ &ta);
2035 TRANSFER (ta, 1);
2036 return 1;
2037 }
2038 else
2039 return 0;
2040}
2041
2042static void
2043api_trace (pTHX_ SV *coro_sv, int flags)
2044{
2045 struct coro *coro = SvSTATE (coro_sv);
2046
2047 if (coro->flags & CF_RUNNING)
2048 croak ("cannot enable tracing on a running coroutine, caught");
2049
2050 if (flags & CC_TRACE)
2051 {
2052 if (!coro->cctx)
2053 coro->cctx = cctx_new_run ();
2054 else if (!(coro->cctx->flags & CC_TRACE))
2055 croak ("cannot enable tracing on coroutine with custom stack, caught");
2056
2057 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2058 }
2059 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2060 {
2061 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2062
2063 if (coro->flags & CF_RUNNING)
2064 PL_runops = RUNOPS_DEFAULT;
2065 else
2066 coro->slot->runops = RUNOPS_DEFAULT;
2067 }
2068}
2069
2070static void
2071coro_push_av (pTHX_ AV *av, I32 gimme_v)
2072{
2073 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2074 {
2075 dSP;
2076
2077 if (gimme_v == G_SCALAR)
2078 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2079 else
810 { 2080 {
811 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2081 int i;
812 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2082 EXTEND (SP, AvFILLp (av) + 1);
813 2083
814 prio = prio > PRIO_MAX ? PRIO_MAX 2084 for (i = 0; i <= AvFILLp (av); ++i)
815 : prio < PRIO_MIN ? PRIO_MIN 2085 PUSHs (AvARRAY (av)[i]);
816 : prio; 2086 }
817 2087
818 av_push (coro_ready [prio - PRIO_MIN], sv); 2088 PUTBACK;
819 coro_nready++; 2089 }
2090}
820 2091
2092static void
2093coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2094{
2095 if (!coro->on_destroy)
2096 coro->on_destroy = newAV ();
2097
2098 av_push (coro->on_destroy, cb);
2099}
2100
2101static void
2102slf_destroy_join (pTHX_ struct CoroSLF *frame)
2103{
2104 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2105}
2106
2107static int
2108slf_check_join (pTHX_ struct CoroSLF *frame)
2109{
2110 struct coro *coro = (struct coro *)frame->data;
2111
2112 if (!coro->status)
2113 return 1;
2114
2115 frame->destroy = 0;
2116
2117 coro_push_av (aTHX_ coro->status, GIMME_V);
2118
2119 SvREFCNT_dec ((SV *)coro->hv);
2120
2121 return 0;
2122}
2123
2124static void
2125slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2126{
2127 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2128
2129 if (items > 1)
2130 croak ("join called with too many arguments");
2131
2132 if (coro->status)
2133 frame->prepare = prepare_nop;
2134 else
2135 {
2136 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2137 frame->prepare = prepare_schedule;
2138 }
2139
2140 frame->check = slf_check_join;
2141 frame->destroy = slf_destroy_join;
2142 frame->data = (void *)coro;
2143 SvREFCNT_inc (coro->hv);
2144}
2145
2146static void
2147coro_call_on_destroy (pTHX_ struct coro *coro)
2148{
2149 AV *od = coro->on_destroy;
2150
2151 if (!od)
2152 return;
2153
2154 while (AvFILLp (od) >= 0)
2155 {
2156 SV *cb = sv_2mortal (av_pop (od));
2157
2158 /* coro hv's (and only hv's at the moment) are supported as well */
2159 if (SvSTATEhv_p (aTHX_ cb))
2160 api_ready (aTHX_ cb);
2161 else
2162 {
2163 dSP; /* don't disturb outer sp */
2164 PUSHMARK (SP);
2165
2166 if (coro->status)
2167 {
2168 PUTBACK;
2169 coro_push_av (aTHX_ coro->status, G_ARRAY);
2170 SPAGAIN;
2171 }
2172
2173 PUTBACK;
2174 call_sv (cb, G_VOID | G_DISCARD);
2175 }
2176 }
2177}
2178
2179static void
2180coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2181{
2182 AV *av;
2183
2184 if (coro->status)
2185 {
2186 av = coro->status;
2187 av_clear (av);
2188 }
2189 else
2190 av = coro->status = newAV ();
2191
2192 /* items are actually not so common, so optimise for this case */
2193 if (items)
2194 {
2195 int i;
2196
2197 av_extend (av, items - 1);
2198
2199 for (i = 0; i < items; ++i)
2200 av_push (av, SvREFCNT_inc_NN (arg [i]));
2201 }
2202}
2203
2204static void
2205slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2206{
2207 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2208 api_ready (aTHX_ sv_manager);
2209
2210 frame->prepare = prepare_schedule;
2211 frame->check = slf_check_repeat;
2212
2213 /* as a minor optimisation, we could unwind all stacks here */
2214 /* but that puts extra pressure on pp_slf, and is not worth much */
2215 /*coro_unwind_stacks (aTHX);*/
2216}
2217
2218static void
2219slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2220{
2221 HV *coro_hv = (HV *)SvRV (coro_current);
2222
2223 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2224 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2225}
2226
2227static void
2228slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2229{
2230 HV *coro_hv;
2231 struct coro *coro;
2232
2233 if (items <= 0)
2234 croak ("Coro::cancel called without coro object,");
2235
2236 coro = SvSTATE (arg [0]);
2237 coro_hv = coro->hv;
2238
2239 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2240
2241 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2242 {
2243 /* coro currently busy cancelling something, so just notify it */
2244 coro->slf_frame.data = (void *)coro;
2245
2246 frame->prepare = prepare_nop;
2247 frame->check = slf_check_nop;
2248 }
2249 else if (coro_hv == (HV *)SvRV (coro_current))
2250 {
2251 /* cancelling the current coro is allowed, and equals terminate */
2252 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2253 }
2254 else
2255 {
2256 struct coro *self = SvSTATE_current;
2257
2258 /* otherwise we cancel directly, purely for speed reasons
2259 * unfortunately, this requires some magic trickery, as
2260 * somebody else could cancel us, so we have to fight the cancellation.
2261 * this is ugly, and hopefully fully worth the extra speed.
2262 * besides, I can't get the slow-but-safe version working...
2263 */
2264 slf_frame.data = 0;
2265 self->flags |= CF_NOCANCEL;
2266 coro_state_destroy (aTHX_ coro);
2267 self->flags &= ~CF_NOCANCEL;
2268
2269 if (slf_frame.data)
2270 {
2271 /* while we were busy we have been cancelled, so terminate */
2272 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2273 }
2274 else
2275 {
2276 frame->prepare = prepare_nop;
2277 frame->check = slf_check_nop;
2278 }
2279 }
2280}
2281
2282static int
2283slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2284{
2285 frame->prepare = 0;
2286 coro_unwind_stacks (aTHX);
2287
2288 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2289
2290 return 1;
2291}
2292
2293static int
2294safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2295{
2296 if (coro->cctx)
2297 croak ("coro inside C callback, unable to cancel at this time, caught");
2298
2299 if (coro->flags & CF_NEW)
2300 {
2301 coro_set_status (aTHX_ coro, arg, items);
2302 coro_state_destroy (aTHX_ coro);
2303 }
2304 else
2305 {
2306 if (!coro->slf_frame.prepare)
2307 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2308
2309 slf_destroy (aTHX_ coro);
2310
2311 coro_set_status (aTHX_ coro, arg, items);
2312 coro->slf_frame.prepare = prepare_nop;
2313 coro->slf_frame.check = slf_check_safe_cancel;
2314
2315 api_ready (aTHX_ (SV *)coro->hv);
2316 }
2317
2318 return 1;
2319}
2320
2321/*****************************************************************************/
2322/* async pool handler */
2323
2324static int
2325slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2326{
2327 HV *hv = (HV *)SvRV (coro_current);
2328 struct coro *coro = (struct coro *)frame->data;
2329
2330 if (!coro->invoke_cb)
2331 return 1; /* loop till we have invoke */
2332 else
2333 {
2334 hv_store (hv, "desc", sizeof ("desc") - 1,
2335 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2336
2337 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2338
2339 {
2340 dSP;
2341 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2342 PUTBACK;
2343 }
2344
2345 SvREFCNT_dec (GvAV (PL_defgv));
2346 GvAV (PL_defgv) = coro->invoke_av;
2347 coro->invoke_av = 0;
2348
2349 return 0;
2350 }
2351}
2352
2353static void
2354slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2355{
2356 HV *hv = (HV *)SvRV (coro_current);
2357 struct coro *coro = SvSTATE_hv ((SV *)hv);
2358
2359 if (ecb_expect_true (coro->saved_deffh))
2360 {
2361 /* subsequent iteration */
2362 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2363 coro->saved_deffh = 0;
2364
2365 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2366 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2367 {
2368 slf_init_terminate_cancel_common (aTHX_ frame, hv);
821 return; 2369 return;
822 } 2370 }
2371 else
2372 {
2373 av_clear (GvAV (PL_defgv));
2374 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2375
2376 coro->prio = 0;
2377
2378 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2379 api_trace (aTHX_ coro_current, 0);
2380
2381 frame->prepare = prepare_schedule;
2382 av_push (av_async_pool, SvREFCNT_inc (hv));
2383 }
2384 }
2385 else
823 } 2386 {
2387 /* first iteration, simply fall through */
2388 frame->prepare = prepare_nop;
2389 }
824 2390
825 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2391 frame->check = slf_check_pool_handler;
2392 frame->data = (void *)coro;
2393}
2394
2395/*****************************************************************************/
2396/* rouse callback */
2397
2398#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2399
2400static void
2401coro_rouse_callback (pTHX_ CV *cv)
2402{
2403 dXSARGS;
2404 SV *data = (SV *)S_GENSUB_ARG;
2405
2406 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2407 {
2408 /* first call, set args */
2409 SV *coro = SvRV (data);
2410 AV *av = newAV ();
2411
2412 SvRV_set (data, (SV *)av);
2413
2414 /* better take a full copy of the arguments */
2415 while (items--)
2416 av_store (av, items, newSVsv (ST (items)));
2417
2418 api_ready (aTHX_ coro);
2419 SvREFCNT_dec (coro);
2420 }
2421
2422 XSRETURN_EMPTY;
2423}
2424
2425static int
2426slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2427{
2428 SV *data = (SV *)frame->data;
2429
2430 if (CORO_THROW)
2431 return 0;
2432
2433 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2434 return 1;
2435
2436 /* now push all results on the stack */
2437 {
2438 dSP;
2439 AV *av = (AV *)SvRV (data);
2440 int i;
2441
2442 EXTEND (SP, AvFILLp (av) + 1);
2443 for (i = 0; i <= AvFILLp (av); ++i)
2444 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2445
2446 /* we have stolen the elements, so set length to zero and free */
2447 AvFILLp (av) = -1;
2448 av_undef (av);
2449
2450 PUTBACK;
2451 }
2452
2453 return 0;
2454}
2455
2456static void
2457slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2458{
2459 SV *cb;
2460
2461 if (items)
2462 cb = arg [0];
2463 else
2464 {
2465 struct coro *coro = SvSTATE_current;
2466
2467 if (!coro->rouse_cb)
2468 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2469
2470 cb = sv_2mortal (coro->rouse_cb);
2471 coro->rouse_cb = 0;
2472 }
2473
2474 if (!SvROK (cb)
2475 || SvTYPE (SvRV (cb)) != SVt_PVCV
2476 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2477 croak ("Coro::rouse_wait called with illegal callback argument,");
2478
2479 {
2480 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2481 SV *data = (SV *)S_GENSUB_ARG;
2482
2483 frame->data = (void *)data;
2484 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2485 frame->check = slf_check_rouse_wait;
2486 }
826} 2487}
827 2488
828static SV * 2489static SV *
829coro_deq (int min_prio) 2490coro_new_rouse_cb (pTHX)
830{ 2491{
831 int prio = PRIO_MAX - PRIO_MIN; 2492 HV *hv = (HV *)SvRV (coro_current);
2493 struct coro *coro = SvSTATE_hv (hv);
2494 SV *data = newRV_inc ((SV *)hv);
2495 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
832 2496
833 min_prio -= PRIO_MIN; 2497 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
834 if (min_prio < 0) 2498 SvREFCNT_dec (data); /* magicext increases the refcount */
835 min_prio = 0;
836 2499
837 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2500 SvREFCNT_dec (coro->rouse_cb);
838 if (av_len (coro_ready[prio]) >= 0) 2501 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2502
2503 return cb;
2504}
2505
2506/*****************************************************************************/
2507/* schedule-like-function opcode (SLF) */
2508
2509static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2510static const CV *slf_cv;
2511static SV **slf_argv;
2512static int slf_argc, slf_arga; /* count, allocated */
2513static I32 slf_ax; /* top of stack, for restore */
2514
2515/* this restores the stack in the case we patched the entersub, to */
2516/* recreate the stack frame as perl will on following calls */
2517/* since entersub cleared the stack */
2518static OP *
2519pp_restore (pTHX)
2520{
2521 int i;
2522 SV **SP = PL_stack_base + slf_ax;
2523
2524 PUSHMARK (SP);
2525
2526 EXTEND (SP, slf_argc + 1);
2527
2528 for (i = 0; i < slf_argc; ++i)
2529 PUSHs (sv_2mortal (slf_argv [i]));
2530
2531 PUSHs ((SV *)CvGV (slf_cv));
2532
2533 RETURNOP (slf_restore.op_first);
2534}
2535
2536static void
2537slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2538{
2539 SV **arg = (SV **)slf_frame.data;
2540
2541 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2542}
2543
2544static void
2545slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 if (items != 2)
2548 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2549
2550 frame->prepare = slf_prepare_transfer;
2551 frame->check = slf_check_nop;
2552 frame->data = (void *)arg; /* let's hope it will stay valid */
2553}
2554
2555static void
2556slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 frame->prepare = prepare_schedule;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2564{
2565 struct coro *next = (struct coro *)slf_frame.data;
2566
2567 SvREFCNT_inc_NN (next->hv);
2568 prepare_schedule_to (aTHX_ ta, next);
2569}
2570
2571static void
2572slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 if (!items)
2575 croak ("Coro::schedule_to expects a coroutine argument, caught");
2576
2577 frame->data = (void *)SvSTATE (arg [0]);
2578 frame->prepare = slf_prepare_schedule_to;
2579 frame->check = slf_check_nop;
2580}
2581
2582static void
2583slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2584{
2585 api_ready (aTHX_ SvRV (coro_current));
2586
2587 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2588}
2589
2590static void
2591slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2592{
2593 frame->prepare = prepare_cede;
2594 frame->check = slf_check_nop;
2595}
2596
2597static void
2598slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 frame->prepare = prepare_cede_notself;
2601 frame->check = slf_check_nop;
2602}
2603
2604/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2605static void
2606slf_destroy (pTHX_ struct coro *coro)
2607{
2608 /* this callback is reserved for slf functions needing to do cleanup */
2609 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2610 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2611
2612 /*
2613 * The on_destroy above most likely is from an SLF call.
2614 * Since by definition the SLF call will not finish when we destroy
2615 * the coro, we will have to force-finish it here, otherwise
2616 * cleanup functions cannot call SLF functions.
2617 */
2618 coro->slf_frame.prepare = 0;
2619}
2620
2621/*
2622 * these not obviously related functions are all rolled into one
2623 * function to increase chances that they all will call transfer with the same
2624 * stack offset
2625 * SLF stands for "schedule-like-function".
2626 */
2627static OP *
2628pp_slf (pTHX)
2629{
2630 I32 checkmark; /* mark SP to see how many elements check has pushed */
2631
2632 /* set up the slf frame, unless it has already been set-up */
2633 /* the latter happens when a new coro has been started */
2634 /* or when a new cctx was attached to an existing coroutine */
2635 if (ecb_expect_true (!slf_frame.prepare))
2636 {
2637 /* first iteration */
2638 dSP;
2639 SV **arg = PL_stack_base + TOPMARK + 1;
2640 int items = SP - arg; /* args without function object */
2641 SV *gv = *sp;
2642
2643 /* do a quick consistency check on the "function" object, and if it isn't */
2644 /* for us, divert to the real entersub */
2645 if (SvTYPE (gv) != SVt_PVGV
2646 || !GvCV (gv)
2647 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2648 return PL_ppaddr[OP_ENTERSUB](aTHX);
2649
2650 if (!(PL_op->op_flags & OPf_STACKED))
839 { 2651 {
840 coro_nready--; 2652 /* ampersand-form of call, use @_ instead of stack */
841 return av_shift (coro_ready[prio]); 2653 AV *av = GvAV (PL_defgv);
2654 arg = AvARRAY (av);
2655 items = AvFILLp (av) + 1;
842 } 2656 }
2657
2658 /* now call the init function, which needs to set up slf_frame */
2659 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2660 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2661
2662 /* pop args */
2663 SP = PL_stack_base + POPMARK;
2664
2665 PUTBACK;
2666 }
2667
2668 /* now that we have a slf_frame, interpret it! */
2669 /* we use a callback system not to make the code needlessly */
2670 /* complicated, but so we can run multiple perl coros from one cctx */
2671
2672 do
2673 {
2674 struct coro_transfer_args ta;
2675
2676 slf_frame.prepare (aTHX_ &ta);
2677 TRANSFER (ta, 0);
2678
2679 checkmark = PL_stack_sp - PL_stack_base;
2680 }
2681 while (slf_frame.check (aTHX_ &slf_frame));
2682
2683 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2684
2685 /* exception handling */
2686 if (ecb_expect_false (CORO_THROW))
2687 {
2688 SV *exception = sv_2mortal (CORO_THROW);
2689
2690 CORO_THROW = 0;
2691 sv_setsv (ERRSV, exception);
2692 croak (0);
2693 }
2694
2695 /* return value handling - mostly like entersub */
2696 /* make sure we put something on the stack in scalar context */
2697 if (GIMME_V == G_SCALAR
2698 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2699 {
2700 dSP;
2701 SV **bot = PL_stack_base + checkmark;
2702
2703 if (sp == bot) /* too few, push undef */
2704 bot [1] = &PL_sv_undef;
2705 else /* too many, take last one */
2706 bot [1] = *sp;
2707
2708 SP = bot + 1;
2709
2710 PUTBACK;
2711 }
2712
2713 return NORMAL;
2714}
2715
2716static void
2717api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2718{
2719 int i;
2720 SV **arg = PL_stack_base + ax;
2721 int items = PL_stack_sp - arg + 1;
2722
2723 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2724
2725 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2726 && PL_op->op_ppaddr != pp_slf)
2727 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2728
2729 CvFLAGS (cv) |= CVf_SLF;
2730 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2731 slf_cv = cv;
2732
2733 /* we patch the op, and then re-run the whole call */
2734 /* we have to put the same argument on the stack for this to work */
2735 /* and this will be done by pp_restore */
2736 slf_restore.op_next = (OP *)&slf_restore;
2737 slf_restore.op_type = OP_CUSTOM;
2738 slf_restore.op_ppaddr = pp_restore;
2739 slf_restore.op_first = PL_op;
2740
2741 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2742
2743 if (PL_op->op_flags & OPf_STACKED)
2744 {
2745 if (items > slf_arga)
2746 {
2747 slf_arga = items;
2748 Safefree (slf_argv);
2749 New (0, slf_argv, slf_arga, SV *);
2750 }
2751
2752 slf_argc = items;
2753
2754 for (i = 0; i < items; ++i)
2755 slf_argv [i] = SvREFCNT_inc (arg [i]);
2756 }
2757 else
2758 slf_argc = 0;
2759
2760 PL_op->op_ppaddr = pp_slf;
2761 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2762
2763 PL_op = (OP *)&slf_restore;
2764}
2765
2766/*****************************************************************************/
2767/* dynamic wind */
2768
2769static void
2770on_enterleave_call (pTHX_ SV *cb)
2771{
2772 dSP;
2773
2774 PUSHSTACK;
2775
2776 PUSHMARK (SP);
2777 PUTBACK;
2778 call_sv (cb, G_VOID | G_DISCARD);
2779 SPAGAIN;
2780
2781 POPSTACK;
2782}
2783
2784static SV *
2785coro_avp_pop_and_free (pTHX_ AV **avp)
2786{
2787 AV *av = *avp;
2788 SV *res = av_pop (av);
2789
2790 if (AvFILLp (av) < 0)
2791 {
2792 *avp = 0;
2793 SvREFCNT_dec (av);
2794 }
2795
2796 return res;
2797}
2798
2799static void
2800coro_pop_on_enter (pTHX_ void *coro)
2801{
2802 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2803 SvREFCNT_dec (cb);
2804}
2805
2806static void
2807coro_pop_on_leave (pTHX_ void *coro)
2808{
2809 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2810 on_enterleave_call (aTHX_ sv_2mortal (cb));
2811}
2812
2813/*****************************************************************************/
2814/* PerlIO::cede */
2815
2816typedef struct
2817{
2818 PerlIOBuf base;
2819 NV next, every;
2820} PerlIOCede;
2821
2822static IV ecb_cold
2823PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2824{
2825 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2826
2827 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2828 self->next = nvtime () + self->every;
2829
2830 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2831}
2832
2833static SV * ecb_cold
2834PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2835{
2836 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2837
2838 return newSVnv (self->every);
2839}
2840
2841static IV
2842PerlIOCede_flush (pTHX_ PerlIO *f)
2843{
2844 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2845 double now = nvtime ();
2846
2847 if (now >= self->next)
2848 {
2849 api_cede (aTHX);
2850 self->next = now + self->every;
2851 }
2852
2853 return PerlIOBuf_flush (aTHX_ f);
2854}
2855
2856static PerlIO_funcs PerlIO_cede =
2857{
2858 sizeof(PerlIO_funcs),
2859 "cede",
2860 sizeof(PerlIOCede),
2861 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2862 PerlIOCede_pushed,
2863 PerlIOBuf_popped,
2864 PerlIOBuf_open,
2865 PerlIOBase_binmode,
2866 PerlIOCede_getarg,
2867 PerlIOBase_fileno,
2868 PerlIOBuf_dup,
2869 PerlIOBuf_read,
2870 PerlIOBuf_unread,
2871 PerlIOBuf_write,
2872 PerlIOBuf_seek,
2873 PerlIOBuf_tell,
2874 PerlIOBuf_close,
2875 PerlIOCede_flush,
2876 PerlIOBuf_fill,
2877 PerlIOBase_eof,
2878 PerlIOBase_error,
2879 PerlIOBase_clearerr,
2880 PerlIOBase_setlinebuf,
2881 PerlIOBuf_get_base,
2882 PerlIOBuf_bufsiz,
2883 PerlIOBuf_get_ptr,
2884 PerlIOBuf_get_cnt,
2885 PerlIOBuf_set_ptrcnt,
2886};
2887
2888/*****************************************************************************/
2889/* Coro::Semaphore & Coro::Signal */
2890
2891static SV *
2892coro_waitarray_new (pTHX_ int count)
2893{
2894 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2895 AV *av = newAV ();
2896 SV **ary;
2897
2898 /* unfortunately, building manually saves memory */
2899 Newx (ary, 2, SV *);
2900 AvALLOC (av) = ary;
2901#if PERL_VERSION_ATLEAST (5,10,0)
2902 AvARRAY (av) = ary;
2903#else
2904 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2905 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2906 SvPVX ((SV *)av) = (char *)ary;
2907#endif
2908 AvMAX (av) = 1;
2909 AvFILLp (av) = 0;
2910 ary [0] = newSViv (count);
2911
2912 return newRV_noinc ((SV *)av);
2913}
2914
2915/* semaphore */
2916
2917static void
2918coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2919{
2920 SV *count_sv = AvARRAY (av)[0];
2921 IV count = SvIVX (count_sv);
2922
2923 count += adjust;
2924 SvIVX (count_sv) = count;
2925
2926 /* now wake up as many waiters as are expected to lock */
2927 while (count > 0 && AvFILLp (av) > 0)
2928 {
2929 SV *cb;
2930
2931 /* swap first two elements so we can shift a waiter */
2932 AvARRAY (av)[0] = AvARRAY (av)[1];
2933 AvARRAY (av)[1] = count_sv;
2934 cb = av_shift (av);
2935
2936 if (SvOBJECT (cb))
2937 {
2938 api_ready (aTHX_ cb);
2939 --count;
2940 }
2941 else if (SvTYPE (cb) == SVt_PVCV)
2942 {
2943 dSP;
2944 PUSHMARK (SP);
2945 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2946 PUTBACK;
2947 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2948 }
2949
2950 SvREFCNT_dec (cb);
2951 }
2952}
2953
2954static void
2955coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2956{
2957 /* call $sem->adjust (0) to possibly wake up some other waiters */
2958 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2959}
2960
2961static int
2962slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2963{
2964 AV *av = (AV *)frame->data;
2965 SV *count_sv = AvARRAY (av)[0];
2966 SV *coro_hv = SvRV (coro_current);
2967
2968 /* if we are about to throw, don't actually acquire the lock, just throw */
2969 if (CORO_THROW)
2970 return 0;
2971 else if (SvIVX (count_sv) > 0)
2972 {
2973 frame->destroy = 0;
2974
2975 if (acquire)
2976 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2977 else
2978 coro_semaphore_adjust (aTHX_ av, 0);
2979
2980 return 0;
2981 }
2982 else
2983 {
2984 int i;
2985 /* if we were woken up but can't down, we look through the whole */
2986 /* waiters list and only add us if we aren't in there already */
2987 /* this avoids some degenerate memory usage cases */
2988 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2989 if (AvARRAY (av)[i] == coro_hv)
2990 return 1;
2991
2992 av_push (av, SvREFCNT_inc (coro_hv));
2993 return 1;
2994 }
2995}
2996
2997static int
2998slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2999{
3000 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3001}
3002
3003static int
3004slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3005{
3006 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3007}
3008
3009static void
3010slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3011{
3012 AV *av = (AV *)SvRV (arg [0]);
3013
3014 if (SvIVX (AvARRAY (av)[0]) > 0)
3015 {
3016 frame->data = (void *)av;
3017 frame->prepare = prepare_nop;
3018 }
3019 else
3020 {
3021 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3022
3023 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3024 frame->prepare = prepare_schedule;
3025 /* to avoid race conditions when a woken-up coro gets terminated */
3026 /* we arrange for a temporary on_destroy that calls adjust (0) */
3027 frame->destroy = coro_semaphore_destroy;
3028 }
3029}
3030
3031static void
3032slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3033{
3034 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3035 frame->check = slf_check_semaphore_down;
3036}
3037
3038static void
3039slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3040{
3041 if (items >= 2)
3042 {
3043 /* callback form */
3044 AV *av = (AV *)SvRV (arg [0]);
3045 SV *cb_cv = s_get_cv_croak (arg [1]);
3046
3047 av_push (av, SvREFCNT_inc_NN (cb_cv));
3048
3049 if (SvIVX (AvARRAY (av)[0]) > 0)
3050 coro_semaphore_adjust (aTHX_ av, 0);
3051
3052 frame->prepare = prepare_nop;
3053 frame->check = slf_check_nop;
3054 }
3055 else
3056 {
3057 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3058 frame->check = slf_check_semaphore_wait;
3059 }
3060}
3061
3062/* signal */
3063
3064static void
3065coro_signal_wake (pTHX_ AV *av, int count)
3066{
3067 SvIVX (AvARRAY (av)[0]) = 0;
3068
3069 /* now signal count waiters */
3070 while (count > 0 && AvFILLp (av) > 0)
3071 {
3072 SV *cb;
3073
3074 /* swap first two elements so we can shift a waiter */
3075 cb = AvARRAY (av)[0];
3076 AvARRAY (av)[0] = AvARRAY (av)[1];
3077 AvARRAY (av)[1] = cb;
3078
3079 cb = av_shift (av);
3080
3081 if (SvTYPE (cb) == SVt_PVCV)
3082 {
3083 dSP;
3084 PUSHMARK (SP);
3085 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3086 PUTBACK;
3087 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3088 }
3089 else
3090 {
3091 api_ready (aTHX_ cb);
3092 sv_setiv (cb, 0); /* signal waiter */
3093 }
3094
3095 SvREFCNT_dec (cb);
3096
3097 --count;
3098 }
3099}
3100
3101static int
3102slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3103{
3104 /* if we are about to throw, also stop waiting */
3105 return SvROK ((SV *)frame->data) && !CORO_THROW;
3106}
3107
3108static void
3109slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3110{
3111 AV *av = (AV *)SvRV (arg [0]);
3112
3113 if (items >= 2)
3114 {
3115 SV *cb_cv = s_get_cv_croak (arg [1]);
3116 av_push (av, SvREFCNT_inc_NN (cb_cv));
3117
3118 if (SvIVX (AvARRAY (av)[0]))
3119 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3120
3121 frame->prepare = prepare_nop;
3122 frame->check = slf_check_nop;
3123 }
3124 else if (SvIVX (AvARRAY (av)[0]))
3125 {
3126 SvIVX (AvARRAY (av)[0]) = 0;
3127 frame->prepare = prepare_nop;
3128 frame->check = slf_check_nop;
3129 }
3130 else
3131 {
3132 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3133
3134 av_push (av, waiter);
3135
3136 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3137 frame->prepare = prepare_schedule;
3138 frame->check = slf_check_signal_wait;
3139 }
3140}
3141
3142/*****************************************************************************/
3143/* Coro::AIO */
3144
3145#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3146
3147/* helper storage struct */
3148struct io_state
3149{
3150 int errorno;
3151 I32 laststype; /* U16 in 5.10.0 */
3152 int laststatval;
3153 Stat_t statcache;
3154};
3155
3156static void
3157coro_aio_callback (pTHX_ CV *cv)
3158{
3159 dXSARGS;
3160 AV *state = (AV *)S_GENSUB_ARG;
3161 SV *coro = av_pop (state);
3162 SV *data_sv = newSV (sizeof (struct io_state));
3163
3164 av_extend (state, items - 1);
3165
3166 sv_upgrade (data_sv, SVt_PV);
3167 SvCUR_set (data_sv, sizeof (struct io_state));
3168 SvPOK_only (data_sv);
3169
3170 {
3171 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3172
3173 data->errorno = errno;
3174 data->laststype = PL_laststype;
3175 data->laststatval = PL_laststatval;
3176 data->statcache = PL_statcache;
3177 }
3178
3179 /* now build the result vector out of all the parameters and the data_sv */
3180 {
3181 int i;
3182
3183 for (i = 0; i < items; ++i)
3184 av_push (state, SvREFCNT_inc_NN (ST (i)));
3185 }
3186
3187 av_push (state, data_sv);
3188
3189 api_ready (aTHX_ coro);
3190 SvREFCNT_dec (coro);
3191 SvREFCNT_dec ((AV *)state);
3192}
3193
3194static int
3195slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3196{
3197 AV *state = (AV *)frame->data;
3198
3199 /* if we are about to throw, return early */
3200 /* this does not cancel the aio request, but at least */
3201 /* it quickly returns */
3202 if (CORO_THROW)
3203 return 0;
3204
3205 /* one element that is an RV? repeat! */
3206 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3207 return 1;
3208
3209 /* restore status */
3210 {
3211 SV *data_sv = av_pop (state);
3212 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3213
3214 errno = data->errorno;
3215 PL_laststype = data->laststype;
3216 PL_laststatval = data->laststatval;
3217 PL_statcache = data->statcache;
3218
3219 SvREFCNT_dec (data_sv);
3220 }
3221
3222 /* push result values */
3223 {
3224 dSP;
3225 int i;
3226
3227 EXTEND (SP, AvFILLp (state) + 1);
3228 for (i = 0; i <= AvFILLp (state); ++i)
3229 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3230
3231 PUTBACK;
3232 }
843 3233
844 return 0; 3234 return 0;
845} 3235}
846 3236
847static void 3237static void
848api_ready (SV *coro) 3238slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
849{ 3239{
850 coro_enq (SvREFCNT_inc (coro)); 3240 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
851} 3241 SV *coro_hv = SvRV (coro_current);
3242 struct coro *coro = SvSTATE_hv (coro_hv);
852 3243
853static void 3244 /* put our coroutine id on the state arg */
854api_schedule (int cede) 3245 av_push (state, SvREFCNT_inc_NN (coro_hv));
855{
856 SV *prev, *next;
857 3246
858 prev = GvSV (coro_current); 3247 /* first see whether we have a non-zero priority and set it as AIO prio */
3248 if (coro->prio)
3249 {
3250 dSP;
859 3251
860 if (cede) 3252 static SV *prio_cv;
861 coro_enq (SvREFCNT_inc (prev)); 3253 static SV *prio_sv;
862 3254
863 next = coro_deq (PRIO_MIN); 3255 if (ecb_expect_false (!prio_cv))
3256 {
3257 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3258 prio_sv = newSViv (0);
3259 }
864 3260
865 if (!next) 3261 PUSHMARK (SP);
866 next = SvREFCNT_inc (GvSV (coro_idle)); 3262 sv_setiv (prio_sv, coro->prio);
3263 XPUSHs (prio_sv);
867 3264
868 GvSV (coro_current) = SvREFCNT_inc (next); 3265 PUTBACK;
869 transfer (aTHX_ 3266 call_sv (prio_cv, G_VOID | G_DISCARD);
870 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3267 }
871 sv_to_coro (next, "Coro::schedule", "next coroutine"),
872 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
873 SvREFCNT_dec (next);
874 SvREFCNT_dec (prev);
875}
876 3268
3269 /* now call the original request */
3270 {
3271 dSP;
3272 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3273 int i;
3274
3275 PUSHMARK (SP);
3276
3277 /* first push all args to the stack */
3278 EXTEND (SP, items + 1);
3279
3280 for (i = 0; i < items; ++i)
3281 PUSHs (arg [i]);
3282
3283 /* now push the callback closure */
3284 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3285
3286 /* now call the AIO function - we assume our request is uncancelable */
3287 PUTBACK;
3288 call_sv ((SV *)req, G_VOID | G_DISCARD);
3289 }
3290
3291 /* now that the request is going, we loop till we have a result */
3292 frame->data = (void *)state;
3293 frame->prepare = prepare_schedule;
3294 frame->check = slf_check_aio_req;
3295}
3296
3297static void
3298coro_aio_req_xs (pTHX_ CV *cv)
3299{
3300 dXSARGS;
3301
3302 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3303
3304 XSRETURN_EMPTY;
3305}
3306
3307/*****************************************************************************/
3308
3309#if CORO_CLONE
3310# include "clone.c"
3311#endif
3312
3313/*****************************************************************************/
3314
3315static SV *
3316coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3317{
3318 SV *coro_sv;
3319 struct coro *coro;
3320 MAGIC *mg;
3321 HV *hv;
3322 SV *cb;
3323 int i;
3324
3325 if (argc > 0)
3326 {
3327 cb = s_get_cv_croak (argv [0]);
3328
3329 if (!is_coro)
3330 {
3331 if (CvISXSUB (cb))
3332 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3333
3334 if (!CvROOT (cb))
3335 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3336 }
3337 }
3338
3339 Newz (0, coro, 1, struct coro);
3340 coro->args = newAV ();
3341 coro->flags = CF_NEW;
3342
3343 if (coro_first) coro_first->prev = coro;
3344 coro->next = coro_first;
3345 coro_first = coro;
3346
3347 coro->hv = hv = newHV ();
3348 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3349 mg->mg_flags |= MGf_DUP;
3350 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3351
3352 if (argc > 0)
3353 {
3354 av_extend (coro->args, argc + is_coro - 1);
3355
3356 if (is_coro)
3357 {
3358 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3359 cb = (SV *)cv_coro_run;
3360 }
3361
3362 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3363
3364 for (i = 1; i < argc; i++)
3365 av_push (coro->args, newSVsv (argv [i]));
3366 }
3367
3368 return coro_sv;
3369}
3370
3371#ifndef __cplusplus
3372ecb_cold XS(boot_Coro__State);
3373#endif
3374
3375#if CORO_JIT
3376
3377static void ecb_noinline ecb_cold
3378pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3379{
3380 dSP;
3381 AV *av = newAV ();
3382
3383 av_store (av, 3, newSVuv (d));
3384 av_store (av, 2, newSVuv (c));
3385 av_store (av, 1, newSVuv (b));
3386 av_store (av, 0, newSVuv (a));
3387
3388 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3389
3390 PUTBACK;
3391}
3392
3393static void ecb_noinline ecb_cold
3394jit_init (pTHX)
3395{
3396 dSP;
3397 SV *load, *save;
3398 char *map_base;
3399 char *load_ptr, *save_ptr;
3400 STRLEN load_len, save_len, map_len;
3401 int count;
3402
3403 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3404
3405 PUSHMARK (SP);
3406#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3407# include "state.h"
3408#undef VARx
3409 count = call_pv ("Coro::State::_jit", G_ARRAY);
3410 SPAGAIN;
3411
3412 save = POPs; save_ptr = SvPVbyte (save, save_len);
3413 load = POPs; load_ptr = SvPVbyte (load, load_len);
3414
3415 map_len = load_len + save_len + 16;
3416
3417 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3418
3419 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3420
3421 load_perl_slots = (load_save_perl_slots_type)map_base;
3422 memcpy (map_base, load_ptr, load_len);
3423
3424 map_base += (load_len + 15) & ~15;
3425
3426 save_perl_slots = (load_save_perl_slots_type)map_base;
3427 memcpy (map_base, save_ptr, save_len);
3428
3429 /* we are good citizens and try to make the page read-only, so the evil evil */
3430 /* hackers might have it a bit more difficult */
3431 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3432
3433 PUTBACK;
3434 eval_pv ("undef &Coro::State::_jit", 1);
3435}
3436
3437#endif
3438
877MODULE = Coro::State PACKAGE = Coro::State 3439MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
878 3440
879PROTOTYPES: ENABLE 3441PROTOTYPES: DISABLE
880 3442
881BOOT: 3443BOOT:
882{ /* {} necessary for stoopid perl-5.6.x */ 3444{
883 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3445#ifdef USE_ITHREADS
884 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3446# if CORO_PTHREAD
3447 coro_thx = PERL_GET_CONTEXT;
3448# endif
3449#endif
3450 BOOT_PAGESIZE;
3451
3452 /* perl defines these to check for existance first, but why it doesn't */
3453 /* just create them one at init time is not clear to me, except for */
3454 /* programs trying to delete them, but... */
3455 /* anyway, we declare this as invalid and make sure they are initialised here */
3456 DEFSV;
3457 ERRSV;
3458
3459 cctx_current = cctx_new_empty ();
3460
3461 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3462 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3463
3464 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3465 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3466 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3467
3468 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3469 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3470 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3471
885 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3472 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
886 3473
887 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3474 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
888 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3475 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
889 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3476 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
890 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3477 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
891
892 if (!padlist_cache)
893 padlist_cache = newHV ();
894 3478
895 main_mainstack = PL_mainstack; 3479 main_mainstack = PL_mainstack;
3480 main_top_env = PL_top_env;
896 3481
3482 while (main_top_env->je_prev)
3483 main_top_env = main_top_env->je_prev;
3484
3485 {
3486 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3487
3488 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3489 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3490
3491 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3492 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3493 }
3494
897 coroapi.ver = CORO_API_VERSION; 3495 coroapi.ver = CORO_API_VERSION;
3496 coroapi.rev = CORO_API_REVISION;
3497
898 coroapi.transfer = api_transfer; 3498 coroapi.transfer = api_transfer;
899}
900 3499
901Coro::State 3500 coroapi.sv_state = SvSTATE_;
902_newprocess(args) 3501 coroapi.execute_slf = api_execute_slf;
903 SV * args 3502 coroapi.prepare_nop = prepare_nop;
3503 coroapi.prepare_schedule = prepare_schedule;
3504 coroapi.prepare_cede = prepare_cede;
3505 coroapi.prepare_cede_notself = prepare_cede_notself;
3506
3507 time_init (aTHX);
3508
3509 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3510#if CORO_JIT
3511 PUTBACK;
3512 jit_init (aTHX);
3513 SPAGAIN;
3514#endif
3515}
3516
3517SV *
3518new (SV *klass, ...)
3519 ALIAS:
3520 Coro::new = 1
3521 CODE:
3522 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3523 OUTPUT:
3524 RETVAL
3525
3526void
3527transfer (...)
3528 PROTOTYPE: $$
3529 CODE:
3530 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3531
3532void
3533_exit (int code)
904 PROTOTYPE: $ 3534 PROTOTYPE: $
3535 CODE:
3536 _exit (code);
3537
3538SV *
3539clone (Coro::State coro)
3540 CODE:
3541{
3542#if CORO_CLONE
3543 struct coro *ncoro = coro_clone (aTHX_ coro);
3544 MAGIC *mg;
3545 /* TODO: too much duplication */
3546 ncoro->hv = newHV ();
3547 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3548 mg->mg_flags |= MGf_DUP;
3549 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3550#else
3551 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3552#endif
3553}
3554 OUTPUT:
3555 RETVAL
3556
3557int
3558cctx_stacksize (int new_stacksize = 0)
3559 PROTOTYPE: ;$
3560 CODE:
3561 RETVAL = cctx_stacksize;
3562 if (new_stacksize)
3563 {
3564 cctx_stacksize = new_stacksize;
3565 ++cctx_gen;
3566 }
3567 OUTPUT:
3568 RETVAL
3569
3570int
3571cctx_max_idle (int max_idle = 0)
3572 PROTOTYPE: ;$
3573 CODE:
3574 RETVAL = cctx_max_idle;
3575 if (max_idle > 1)
3576 cctx_max_idle = max_idle;
3577 OUTPUT:
3578 RETVAL
3579
3580int
3581cctx_count ()
3582 PROTOTYPE:
3583 CODE:
3584 RETVAL = cctx_count;
3585 OUTPUT:
3586 RETVAL
3587
3588int
3589cctx_idle ()
3590 PROTOTYPE:
3591 CODE:
3592 RETVAL = cctx_idle;
3593 OUTPUT:
3594 RETVAL
3595
3596void
3597list ()
3598 PROTOTYPE:
3599 PPCODE:
3600{
3601 struct coro *coro;
3602 for (coro = coro_first; coro; coro = coro->next)
3603 if (coro->hv)
3604 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3605}
3606
3607void
3608call (Coro::State coro, SV *coderef)
3609 ALIAS:
3610 eval = 1
3611 CODE:
3612{
3613 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3614 {
3615 struct coro *current = SvSTATE_current;
3616 struct CoroSLF slf_save;
3617
3618 if (current != coro)
3619 {
3620 PUTBACK;
3621 save_perl (aTHX_ current);
3622 load_perl (aTHX_ coro);
3623 /* the coro is most likely in an active SLF call.
3624 * while not strictly required (the code we execute is
3625 * not allowed to call any SLF functions), it's cleaner
3626 * to reinitialise the slf_frame and restore it later.
3627 * This might one day allow us to actually do SLF calls
3628 * from code executed here.
3629 */
3630 slf_save = slf_frame;
3631 slf_frame.prepare = 0;
3632 SPAGAIN;
3633 }
3634
3635 PUSHSTACK;
3636
3637 PUSHMARK (SP);
3638 PUTBACK;
3639
3640 if (ix)
3641 eval_sv (coderef, 0);
3642 else
3643 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3644
3645 POPSTACK;
3646 SPAGAIN;
3647
3648 if (current != coro)
3649 {
3650 PUTBACK;
3651 slf_frame = slf_save;
3652 save_perl (aTHX_ coro);
3653 load_perl (aTHX_ current);
3654 SPAGAIN;
3655 }
3656 }
3657}
3658
3659SV *
3660is_ready (Coro::State coro)
3661 PROTOTYPE: $
3662 ALIAS:
3663 is_ready = CF_READY
3664 is_running = CF_RUNNING
3665 is_new = CF_NEW
3666 is_destroyed = CF_ZOMBIE
3667 is_zombie = CF_ZOMBIE
3668 is_suspended = CF_SUSPENDED
3669 CODE:
3670 RETVAL = boolSV (coro->flags & ix);
3671 OUTPUT:
3672 RETVAL
3673
3674void
3675throw (Coro::State self, SV *exception = &PL_sv_undef)
3676 PROTOTYPE: $;$
905 CODE: 3677 CODE:
906 Coro__State coro; 3678{
3679 struct coro *current = SvSTATE_current;
3680 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3681 SvREFCNT_dec (*exceptionp);
3682 SvGETMAGIC (exception);
3683 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3684}
907 3685
908 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3686void
909 croak ("Coro::State::_newprocess expects an arrayref"); 3687api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3688 PROTOTYPE: $;$
3689 C_ARGS: aTHX_ coro, flags
3690
3691SV *
3692has_cctx (Coro::State coro)
3693 PROTOTYPE: $
3694 CODE:
3695 /* maybe manage the running flag differently */
3696 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3697 OUTPUT:
3698 RETVAL
3699
3700int
3701is_traced (Coro::State coro)
3702 PROTOTYPE: $
3703 CODE:
3704 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3705 OUTPUT:
3706 RETVAL
3707
3708UV
3709rss (Coro::State coro)
3710 PROTOTYPE: $
3711 ALIAS:
3712 usecount = 1
3713 CODE:
3714 switch (ix)
3715 {
3716 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3717 case 1: RETVAL = coro->usecount; break;
910 3718 }
911 New (0, coro, 1, struct coro); 3719 OUTPUT:
912
913 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
914 coro->mainstack = 0; /* actual work is done inside transfer */
915 coro->stack = 0;
916
917 RETVAL = coro; 3720 RETVAL
3721
3722void
3723force_cctx ()
3724 PROTOTYPE:
3725 CODE:
3726 cctx_current->idle_sp = 0;
3727
3728void
3729swap_defsv (Coro::State self)
3730 PROTOTYPE: $
3731 ALIAS:
3732 swap_defav = 1
3733 CODE:
3734 if (!self->slot)
3735 croak ("cannot swap state with coroutine that has no saved state,");
3736 else
3737 {
3738 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3739 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3740
3741 SV *tmp = *src; *src = *dst; *dst = tmp;
3742 }
3743
3744void
3745cancel (Coro::State self)
3746 CODE:
3747 coro_state_destroy (aTHX_ self);
3748
3749SV *
3750enable_times (int enabled = enable_times)
3751 CODE:
3752{
3753 RETVAL = boolSV (enable_times);
3754
3755 if (enabled != enable_times)
3756 {
3757 enable_times = enabled;
3758
3759 coro_times_update ();
3760 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3761 }
3762}
918 OUTPUT: 3763 OUTPUT:
919 RETVAL 3764 RETVAL
920 3765
921void 3766void
922transfer(prev, next, flags) 3767times (Coro::State self)
923 Coro::State_or_hashref prev 3768 PPCODE:
924 Coro::State_or_hashref next 3769{
925 int flags 3770 struct coro *current = SvSTATE (coro_current);
926 PROTOTYPE: @ 3771
3772 if (ecb_expect_false (current == self))
3773 {
3774 coro_times_update ();
3775 coro_times_add (SvSTATE (coro_current));
3776 }
3777
3778 EXTEND (SP, 2);
3779 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3780 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3781
3782 if (ecb_expect_false (current == self))
3783 coro_times_sub (SvSTATE (coro_current));
3784}
3785
3786void
3787swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3788 CODE:
3789{
3790 struct coro *current = SvSTATE_current;
3791
3792 if (current == coro)
3793 SWAP_SVS (current);
3794
3795 if (!coro->swap_sv)
3796 coro->swap_sv = newAV ();
3797
3798 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3799 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3800
3801 if (current == coro)
3802 SWAP_SVS (current);
3803}
3804
3805
3806MODULE = Coro::State PACKAGE = Coro
3807
3808BOOT:
3809{
3810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3812 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3813 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3815 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3816 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3817 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3818
3819 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3820 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3821 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3822 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3823
3824 coro_stash = gv_stashpv ("Coro", TRUE);
3825
3826 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3827 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3828 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3829 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3830 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3831 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3832
3833 {
3834 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3835
3836 coroapi.schedule = api_schedule;
3837 coroapi.schedule_to = api_schedule_to;
3838 coroapi.cede = api_cede;
3839 coroapi.cede_notself = api_cede_notself;
3840 coroapi.ready = api_ready;
3841 coroapi.is_ready = api_is_ready;
3842 coroapi.nready = coro_nready;
3843 coroapi.current = coro_current;
3844
3845 /*GCoroAPI = &coroapi;*/
3846 sv_setiv (sv, (IV)&coroapi);
3847 SvREADONLY_on (sv);
3848 }
3849}
3850
3851SV *
3852async (...)
3853 PROTOTYPE: &@
927 CODE: 3854 CODE:
928 PUTBACK; 3855 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
929 transfer (aTHX_ prev, next, flags); 3856 api_ready (aTHX_ RETVAL);
930 SPAGAIN; 3857 OUTPUT:
3858 RETVAL
931 3859
932void 3860void
933DESTROY(coro) 3861_destroy (Coro::State coro)
934 Coro::State coro 3862 CODE:
935 CODE: 3863 /* used by the manager thread */
936 3864 coro_state_destroy (aTHX_ coro);
937 if (coro->mainstack && coro->mainstack != main_mainstack)
938 {
939 struct coro temp;
940
941 PUTBACK;
942 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
943 LOAD(aTHX_ coro);
944 SPAGAIN;
945
946 destroy_stacks (aTHX);
947
948 LOAD((&temp)); /* this will get rid of defsv etc.. */
949 SPAGAIN;
950
951 coro->mainstack = 0;
952 }
953
954 deallocate_stack (coro);
955
956 Safefree (coro);
957 3865
958void 3866void
959flush() 3867on_destroy (Coro::State coro, SV *cb)
960 CODE: 3868 CODE:
961#ifdef MAY_FLUSH 3869 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
962 flush_padlist_cache ();
963#endif
964 3870
965void 3871void
966_exit(code) 3872join (...)
967 int code 3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_join);
3875
3876void
3877terminate (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3880
3881void
3882cancel (...)
3883 CODE:
3884 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3885
3886int
3887safe_cancel (Coro::State self, ...)
3888 C_ARGS: aTHX_ self, &ST (1), items - 1
3889
3890void
3891schedule (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3894
3895void
3896schedule_to (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3899
3900void
3901cede_to (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3904
3905void
3906cede (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_cede);
3909
3910void
3911cede_notself (...)
3912 CODE:
3913 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3914
3915void
3916_set_current (SV *current)
968 PROTOTYPE: $ 3917 PROTOTYPE: $
969 CODE: 3918 CODE:
970#if defined(__GLIBC__) || _POSIX_C_SOURCE 3919 SvREFCNT_dec (SvRV (coro_current));
971 _exit (code); 3920 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
972#else
973 signal (SIGTERM, SIG_DFL);
974 raise (SIGTERM);
975 exit (code);
976#endif
977
978MODULE = Coro::State PACKAGE = Coro::Cont
979
980# this is slightly dirty (should expose a c-level api)
981 3921
982void 3922void
983yield(...) 3923_set_readyhook (SV *hook)
984 PROTOTYPE: @ 3924 PROTOTYPE: $
985 CODE: 3925 CODE:
986 static SV *returnstk;
987 SV *sv;
988 AV *defav = GvAV (PL_defgv);
989 struct coro *prev, *next;
990
991 if (!returnstk)
992 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
993
994 /* set up @_ -- ugly */
995 av_clear (defav);
996 av_fill (defav, items - 1);
997 while (items--)
998 av_store (defav, items, SvREFCNT_inc (ST(items)));
999
1000 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1001 sv = av_pop ((AV *)SvRV (returnstk));
1002 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1003 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1004 SvREFCNT_dec (sv); 3926 SvREFCNT_dec (coro_readyhook);
1005 3927 SvGETMAGIC (hook);
1006 transfer(aTHX_ prev, next, 0); 3928 if (SvOK (hook))
1007 3929 {
1008MODULE = Coro::State PACKAGE = Coro
1009
1010# this is slightly dirty (should expose a c-level api)
1011
1012BOOT:
1013{
1014 int i;
1015 HV *stash = gv_stashpv ("Coro", TRUE);
1016
1017 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1018 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1019 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1020 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1021 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1022 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1023
1024 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1025 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1026
1027 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1028 coro_ready[i] = newAV (); 3930 coro_readyhook = newSVsv (hook);
1029 3931 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1030 {
1031 SV *sv = perl_get_sv("Coro::API", 1);
1032
1033 coroapi.schedule = api_schedule;
1034 coroapi.ready = api_ready;
1035 coroapi.nready = &coro_nready;
1036 coroapi.current = coro_current;
1037
1038 GCoroAPI = &coroapi;
1039 sv_setiv(sv, (IV)&coroapi);
1040 SvREADONLY_on(sv);
1041 } 3932 }
1042} 3933 else
3934 {
3935 coro_readyhook = 0;
3936 CORO_READYHOOK = 0;
3937 }
1043 3938
1044void 3939int
3940prio (Coro::State coro, int newprio = 0)
3941 PROTOTYPE: $;$
3942 ALIAS:
3943 nice = 1
3944 CODE:
3945{
3946 RETVAL = coro->prio;
3947
3948 if (items > 1)
3949 {
3950 if (ix)
3951 newprio = coro->prio - newprio;
3952
3953 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3954 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3955
3956 coro->prio = newprio;
3957 }
3958}
3959 OUTPUT:
3960 RETVAL
3961
3962SV *
1045ready(self) 3963ready (SV *self)
1046 SV * self 3964 PROTOTYPE: $
1047 CODE: 3965 CODE:
1048 api_ready (self); 3966 RETVAL = boolSV (api_ready (aTHX_ self));
3967 OUTPUT:
3968 RETVAL
1049 3969
1050int 3970int
1051nready(...) 3971nready (...)
1052 PROTOTYPE: 3972 PROTOTYPE:
1053 CODE: 3973 CODE:
1054 RETVAL = coro_nready; 3974 RETVAL = coro_nready;
1055 OUTPUT: 3975 OUTPUT:
1056 RETVAL 3976 RETVAL
1057 3977
1058void 3978void
1059schedule(...) 3979suspend (Coro::State self)
1060 PROTOTYPE: 3980 PROTOTYPE: $
1061 ALIAS:
1062 cede = 1
1063 CODE: 3981 CODE:
1064 api_schedule (ix); 3982 self->flags |= CF_SUSPENDED;
1065 3983
3984void
3985resume (Coro::State self)
3986 PROTOTYPE: $
3987 CODE:
3988 self->flags &= ~CF_SUSPENDED;
3989
3990void
3991_pool_handler (...)
3992 CODE:
3993 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3994
3995void
3996async_pool (SV *cv, ...)
3997 PROTOTYPE: &@
3998 PPCODE:
3999{
4000 HV *hv = (HV *)av_pop (av_async_pool);
4001 AV *av = newAV ();
4002 SV *cb = ST (0);
4003 int i;
4004
4005 av_extend (av, items - 2);
4006 for (i = 1; i < items; ++i)
4007 av_push (av, SvREFCNT_inc_NN (ST (i)));
4008
4009 if ((SV *)hv == &PL_sv_undef)
4010 {
4011 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4012 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4013 SvREFCNT_dec (sv);
4014 }
4015
4016 {
4017 struct coro *coro = SvSTATE_hv (hv);
4018
4019 assert (!coro->invoke_cb);
4020 assert (!coro->invoke_av);
4021 coro->invoke_cb = SvREFCNT_inc (cb);
4022 coro->invoke_av = av;
4023 }
4024
4025 api_ready (aTHX_ (SV *)hv);
4026
4027 if (GIMME_V != G_VOID)
4028 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4029 else
4030 SvREFCNT_dec (hv);
4031}
4032
4033SV *
4034rouse_cb ()
4035 PROTOTYPE:
4036 CODE:
4037 RETVAL = coro_new_rouse_cb (aTHX);
4038 OUTPUT:
4039 RETVAL
4040
4041void
4042rouse_wait (...)
4043 PROTOTYPE: ;$
4044 PPCODE:
4045 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4046
4047void
4048on_enter (SV *block)
4049 ALIAS:
4050 on_leave = 1
4051 PROTOTYPE: &
4052 CODE:
4053{
4054 struct coro *coro = SvSTATE_current;
4055 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4056
4057 block = s_get_cv_croak (block);
4058
4059 if (!*avp)
4060 *avp = newAV ();
4061
4062 av_push (*avp, SvREFCNT_inc (block));
4063
4064 if (!ix)
4065 on_enterleave_call (aTHX_ block);
4066
4067 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4068 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4069 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4070}
4071
4072
4073MODULE = Coro::State PACKAGE = PerlIO::cede
4074
4075BOOT:
4076 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4077
4078
4079MODULE = Coro::State PACKAGE = Coro::Semaphore
4080
4081SV *
4082new (SV *klass, SV *count = 0)
4083 CODE:
4084{
4085 int semcnt = 1;
4086
4087 if (count)
4088 {
4089 SvGETMAGIC (count);
4090
4091 if (SvOK (count))
4092 semcnt = SvIV (count);
4093 }
4094
4095 RETVAL = sv_bless (
4096 coro_waitarray_new (aTHX_ semcnt),
4097 GvSTASH (CvGV (cv))
4098 );
4099}
4100 OUTPUT:
4101 RETVAL
4102
4103# helper for Coro::Channel and others
4104SV *
4105_alloc (int count)
4106 CODE:
4107 RETVAL = coro_waitarray_new (aTHX_ count);
4108 OUTPUT:
4109 RETVAL
4110
4111SV *
4112count (SV *self)
4113 CODE:
4114 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4115 OUTPUT:
4116 RETVAL
4117
4118void
4119up (SV *self, int adjust = 1)
4120 ALIAS:
4121 adjust = 1
4122 CODE:
4123 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4124
4125void
4126down (...)
4127 CODE:
4128 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4129
4130void
4131wait (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4134
4135void
4136try (SV *self)
4137 PPCODE:
4138{
4139 AV *av = (AV *)SvRV (self);
4140 SV *count_sv = AvARRAY (av)[0];
4141 IV count = SvIVX (count_sv);
4142
4143 if (count > 0)
4144 {
4145 --count;
4146 SvIVX (count_sv) = count;
4147 XSRETURN_YES;
4148 }
4149 else
4150 XSRETURN_NO;
4151}
4152
4153void
4154waiters (SV *self)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (self);
4158 int wcount = AvFILLp (av) + 1 - 1;
4159
4160 if (GIMME_V == G_SCALAR)
4161 XPUSHs (sv_2mortal (newSViv (wcount)));
4162 else
4163 {
4164 int i;
4165 EXTEND (SP, wcount);
4166 for (i = 1; i <= wcount; ++i)
4167 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4168 }
4169}
4170
4171MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4172
4173void
4174_may_delete (SV *sem, int count, unsigned int extra_refs)
4175 PPCODE:
4176{
4177 AV *av = (AV *)SvRV (sem);
4178
4179 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4180 && AvFILLp (av) == 0 /* no waiters, just count */
4181 && SvIV (AvARRAY (av)[0]) == count)
4182 XSRETURN_YES;
4183
4184 XSRETURN_NO;
4185}
4186
4187MODULE = Coro::State PACKAGE = Coro::Signal
4188
4189SV *
4190new (SV *klass)
4191 CODE:
4192 RETVAL = sv_bless (
4193 coro_waitarray_new (aTHX_ 0),
4194 GvSTASH (CvGV (cv))
4195 );
4196 OUTPUT:
4197 RETVAL
4198
4199void
4200wait (...)
4201 CODE:
4202 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4203
4204void
4205broadcast (SV *self)
4206 CODE:
4207{
4208 AV *av = (AV *)SvRV (self);
4209 coro_signal_wake (aTHX_ av, AvFILLp (av));
4210}
4211
4212void
4213send (SV *self)
4214 CODE:
4215{
4216 AV *av = (AV *)SvRV (self);
4217
4218 if (AvFILLp (av))
4219 coro_signal_wake (aTHX_ av, 1);
4220 else
4221 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4222}
4223
4224IV
4225awaited (SV *self)
4226 CODE:
4227 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4228 OUTPUT:
4229 RETVAL
4230
4231
4232MODULE = Coro::State PACKAGE = Coro::AnyEvent
4233
4234BOOT:
4235 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4236
4237void
4238_schedule (...)
4239 CODE:
4240{
4241 static int incede;
4242
4243 api_cede_notself (aTHX);
4244
4245 ++incede;
4246 while (coro_nready >= incede && api_cede (aTHX))
4247 ;
4248
4249 sv_setsv (sv_activity, &PL_sv_undef);
4250 if (coro_nready >= incede)
4251 {
4252 PUSHMARK (SP);
4253 PUTBACK;
4254 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4255 }
4256
4257 --incede;
4258}
4259
4260
4261MODULE = Coro::State PACKAGE = Coro::AIO
4262
4263void
4264_register (char *target, char *proto, SV *req)
4265 CODE:
4266{
4267 SV *req_cv = s_get_cv_croak (req);
4268 /* newXSproto doesn't return the CV on 5.8 */
4269 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4270 sv_setpv ((SV *)slf_cv, proto);
4271 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4272}
4273
4274MODULE = Coro::State PACKAGE = Coro::Select
4275
4276void
4277patch_pp_sselect ()
4278 CODE:
4279 if (!coro_old_pp_sselect)
4280 {
4281 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4282 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4283 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4284 }
4285
4286void
4287unpatch_pp_sselect ()
4288 CODE:
4289 if (coro_old_pp_sselect)
4290 {
4291 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4292 coro_old_pp_sselect = 0;
4293 }
4294

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