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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.362 by root, Wed Jul 1 07:58:45 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
33 114
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 116# undef CORO_STACKGUARD
36#endif 117#endif
37 118
38#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 120# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
51# endif 161# endif
52# include <limits.h> 162#endif
53# ifndef PAGESIZE 163
54# define PAGESIZE pagesize 164#ifdef __linux
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 165# include <time.h> /* for timespec */
56static long pagesize; 166# include <syscall.h> /* for SYS_* */
57# else 167# ifdef SYS_clock_gettime
58# define BOOT_PAGESIZE 168# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
169# define CORO_CLOCK_MONOTONIC 1
170# define CORO_CLOCK_THREAD_CPUTIME_ID 3
59# endif 171# endif
60#endif 172#endif
61 173
62#define SUB_INIT "Coro::State::initialize" 174static double (*nvtime)(); /* so why doesn't it take void? */
63#define UCORO_STATE "_coro_state" 175static void (*u2time)(pTHX_ UV ret[2]);
64 176
65/* The next macro should declare a variable stacklevel that contains and approximation 177/* we hijack an hopefully unused CV flag for our purposes */
66 * to the current C stack pointer. Its property is that it changes with each call 178#define CVf_SLF 0x4000
67 * and should be unique. */ 179static OP *pp_slf (pTHX);
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69 180
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 181static U32 cctx_gen;
71 182static size_t cctx_stacksize = CORO_STACKSIZE;
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 183static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 184static AV *main_mainstack; /* used to differentiate between $main and others */
185static JMPENV *main_top_env;
87static HV *coro_state_stash; 186static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 187static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 188
92/* this is actually not only the c stack but also c registers etc... */ 189static AV *av_destroy; /* destruction queue */
190static SV *sv_manager; /* the manager coro */
191static SV *sv_idle; /* $Coro::idle */
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static SV *sv_async_pool_idle; /* description string */
203static AV *av_async_pool; /* idle pool */
204static SV *sv_Coro; /* class string */
205static CV *cv_pool_handler;
206static CV *cv_coro_state_new;
207
208/* Coro::AnyEvent */
209static SV *sv_activity;
210
211/* enable processtime/realtime profiling */
212static char enable_times;
213typedef U32 coro_ts[2];
214static coro_ts time_real, time_cpu;
215static char times_valid;
216
217static struct coro_cctx *cctx_first;
218static int cctx_count, cctx_idle;
219
220enum {
221 CC_MAPPED = 0x01,
222 CC_NOREUSE = 0x02, /* throw this away after tracing */
223 CC_TRACE = 0x04,
224 CC_TRACE_SUB = 0x08, /* trace sub calls */
225 CC_TRACE_LINE = 0x10, /* trace each statement */
226 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
227};
228
229/* this is a structure representing a c-level coroutine */
93typedef struct { 230typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 231{
95 int usecnt; /* shared by how many coroutines */ 232 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 233
234 /* the stack */
235 void *sptr;
236 size_t ssize;
237
238 /* cpu state */
239 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
240 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
241 JMPENV *top_env;
98 coro_context cctx; 242 coro_context cctx;
99 243
100 void *sptr; 244 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 245#if CORO_USE_VALGRIND
102} coro_stack; 246 int valgrind_id;
247#endif
248 unsigned char flags;
249} coro_cctx;
103 250
251coro_cctx *cctx_current; /* the currently running cctx */
252
253/*****************************************************************************/
254
255enum {
256 CF_RUNNING = 0x0001, /* coroutine is running */
257 CF_READY = 0x0002, /* coroutine is ready */
258 CF_NEW = 0x0004, /* has never been switched to */
259 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
260 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
261};
262
263/* the structure where most of the perl state is stored, overlaid on the cxstack */
264typedef struct
265{
266 SV *defsv;
267 AV *defav;
268 SV *errsv;
269 SV *irsgv;
270 HV *hinthv;
271#define VAR(name,type) type name;
272# include "state.h"
273#undef VAR
274} perl_slots;
275
276#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
277
278/* this is a structure representing a perl-level coroutine */
104struct coro { 279struct coro {
105 /* the optional C context */ 280 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 281 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 282
110 /* optionally saved, might be zero */ 283 /* ready queue */
111 AV *defav; 284 struct coro *next_ready;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118 285
119 /* the stacks and related info (callchain etc..) */ 286 /* state data */
120 PERL_SI *curstackinfo; 287 struct CoroSLF slf_frame; /* saved slf frame */
121 AV *curstack;
122 AV *mainstack; 288 AV *mainstack;
123 SV **stack_sp; 289 perl_slots *slot; /* basically the saved sp */
124 OP *op; 290
125 SV **curpad; 291 CV *startcv; /* the CV to execute */
126 AV *comppad; 292 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 293 int refcnt; /* coroutines are refcounted, yes */
128 SV **stack_base; 294 int flags; /* CF_ flags */
129 SV **stack_max; 295 HV *hv; /* the perl hash associated with this coro, if any */
130 SV **tmps_stack; 296 void (*on_destroy)(pTHX_ struct coro *coro);
131 I32 tmps_floor; 297
132 I32 tmps_ix; 298 /* statistics */
133 I32 tmps_max; 299 int usecount; /* number of transfers to this coro */
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 300
150 /* coro process data */ 301 /* coro process data */
151 int prio; 302 int prio;
303 SV *except; /* exception to be thrown */
304 SV *rouse_cb;
152 305
153 /* data associated with this coroutine (initial args) */ 306 /* async_pool */
154 AV *args; 307 SV *saved_deffh;
155 int refcnt; 308 SV *invoke_cb;
309 AV *invoke_av;
310
311 /* on_enter/on_leave */
312 AV *on_enter;
313 AV *on_leave;
314
315 /* times */
316 coro_ts t_cpu, t_real;
317
318 /* linked list */
319 struct coro *next, *prev;
156}; 320};
157 321
158typedef struct coro *Coro__State; 322typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 323typedef struct coro *Coro__State_or_hashref;
160 324
325/* the following variables are effectively part of the perl context */
326/* and get copied between struct coro and these variables */
327/* the mainr easonw e don't support windows process emulation */
328static struct CoroSLF slf_frame; /* the current slf frame */
329
330/** Coro ********************************************************************/
331
332#define CORO_PRIO_MAX 3
333#define CORO_PRIO_HIGH 1
334#define CORO_PRIO_NORMAL 0
335#define CORO_PRIO_LOW -1
336#define CORO_PRIO_IDLE -3
337#define CORO_PRIO_MIN -4
338
339/* for Coro.pm */
340static SV *coro_current;
341static SV *coro_readyhook;
342static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
343static CV *cv_coro_run, *cv_coro_terminate;
344static struct coro *coro_first;
345#define coro_nready coroapi.nready
346
347/** lowlevel stuff **********************************************************/
348
349static SV *
350coro_get_sv (pTHX_ const char *name, int create)
351{
352#if PERL_VERSION_ATLEAST (5,10,0)
353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
354 get_sv (name, create);
355#endif
356 return get_sv (name, create);
357}
358
161static AV * 359static AV *
360coro_get_av (pTHX_ const char *name, int create)
361{
362#if PERL_VERSION_ATLEAST (5,10,0)
363 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
364 get_av (name, create);
365#endif
366 return get_av (name, create);
367}
368
369static HV *
370coro_get_hv (pTHX_ const char *name, int create)
371{
372#if PERL_VERSION_ATLEAST (5,10,0)
373 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
374 get_hv (name, create);
375#endif
376 return get_hv (name, create);
377}
378
379/* may croak */
380INLINE CV *
381coro_sv_2cv (pTHX_ SV *sv)
382{
383 HV *st;
384 GV *gvp;
385 CV *cv = sv_2cv (sv, &st, &gvp, 0);
386
387 if (!cv)
388 croak ("code reference expected");
389
390 return cv;
391}
392
393INLINE void
394coro_times_update ()
395{
396#ifdef coro_clock_gettime
397 struct timespec ts;
398
399 ts.tv_sec = ts.tv_nsec = 0;
400 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
401 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
402
403 ts.tv_sec = ts.tv_nsec = 0;
404 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
405 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
406#else
407 dTHX;
408 UV tv[2];
409
410 u2time (aTHX_ tv);
411 time_real [0] = tv [0];
412 time_real [1] = tv [1] * 1000;
413#endif
414}
415
416INLINE void
417coro_times_add (struct coro *c)
418{
419 c->t_real [1] += time_real [1];
420 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
421 c->t_real [0] += time_real [0];
422
423 c->t_cpu [1] += time_cpu [1];
424 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
425 c->t_cpu [0] += time_cpu [0];
426}
427
428INLINE void
429coro_times_sub (struct coro *c)
430{
431 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
432 c->t_real [1] -= time_real [1];
433 c->t_real [0] -= time_real [0];
434
435 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
436 c->t_cpu [1] -= time_cpu [1];
437 c->t_cpu [0] -= time_cpu [0];
438}
439
440/*****************************************************************************/
441/* magic glue */
442
443#define CORO_MAGIC_type_cv 26
444#define CORO_MAGIC_type_state PERL_MAGIC_ext
445
446#define CORO_MAGIC_NN(sv, type) \
447 (expect_true (SvMAGIC (sv)->mg_type == type) \
448 ? SvMAGIC (sv) \
449 : mg_find (sv, type))
450
451#define CORO_MAGIC(sv, type) \
452 (expect_true (SvMAGIC (sv)) \
453 ? CORO_MAGIC_NN (sv, type) \
454 : 0)
455
456#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
457#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
458
459INLINE struct coro *
460SvSTATE_ (pTHX_ SV *coro)
461{
462 HV *stash;
463 MAGIC *mg;
464
465 if (SvROK (coro))
466 coro = SvRV (coro);
467
468 if (expect_false (SvTYPE (coro) != SVt_PVHV))
469 croak ("Coro::State object required");
470
471 stash = SvSTASH (coro);
472 if (expect_false (stash != coro_stash && stash != coro_state_stash))
473 {
474 /* very slow, but rare, check */
475 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
476 croak ("Coro::State object required");
477 }
478
479 mg = CORO_MAGIC_state (coro);
480 return (struct coro *)mg->mg_ptr;
481}
482
483#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
484
485/* faster than SvSTATE, but expects a coroutine hv */
486#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
487#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
488
489/*****************************************************************************/
490/* padlist management and caching */
491
492static AV *
162coro_clone_padlist (pTHX_ CV *cv) 493coro_derive_padlist (pTHX_ CV *cv)
163{ 494{
164 AV *padlist = CvPADLIST (cv); 495 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 496 AV *newpadlist, *newpad;
166 497
167 newpadlist = newAV (); 498 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 499 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 500#if PERL_VERSION_ATLEAST (5,10,0)
501 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
502#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 503 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 504#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 505 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 506 --AvFILLp (padlist);
176 507
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 508 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
178 av_store (newpadlist, 1, (SV *)newpad); 509 av_store (newpadlist, 1, (SV *)newpad);
179 510
180 return newpadlist; 511 return newpadlist;
181} 512}
182 513
183static void 514static void
184free_padlist (pTHX_ AV *padlist) 515free_padlist (pTHX_ AV *padlist)
185{ 516{
186 /* may be during global destruction */ 517 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 518 if (!IN_DESTRUCT)
188 { 519 {
189 I32 i = AvFILLp (padlist); 520 I32 i = AvFILLp (padlist);
190 while (i >= 0) 521
522 while (i > 0) /* special-case index 0 */
191 { 523 {
192 SV **svp = av_fetch (padlist, i--, FALSE); 524 /* we try to be extra-careful here */
193 if (svp) 525 AV *av = (AV *)AvARRAY (padlist)[i--];
194 { 526 I32 j = AvFILLp (av);
195 SV *sv; 527
196 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 528 while (j >= 0)
529 SvREFCNT_dec (AvARRAY (av)[j--]);
530
531 AvFILLp (av) = -1;
197 SvREFCNT_dec (sv); 532 SvREFCNT_dec (av);
198
199 SvREFCNT_dec (*svp);
200 }
201 } 533 }
202 534
535 SvREFCNT_dec (AvARRAY (padlist)[0]);
536
537 AvFILLp (padlist) = -1;
203 SvREFCNT_dec ((SV*)padlist); 538 SvREFCNT_dec ((SV*)padlist);
204 } 539 }
205} 540}
206 541
207static int 542static int
208coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 543coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
209{ 544{
210 AV *padlist; 545 AV *padlist;
211 AV *av = (AV *)mg->mg_obj; 546 AV *av = (AV *)mg->mg_obj;
547
548 /* perl manages to free our internal AV and _then_ call us */
549 if (IN_DESTRUCT)
550 return 0;
212 551
213 /* casting is fun. */ 552 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 553 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 554 free_padlist (aTHX_ padlist);
216 555
217 SvREFCNT_dec (av); 556 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 557
219 return 0; 558 return 0;
220} 559}
221 560
222#define PERL_MAGIC_coro PERL_MAGIC_ext 561static MGVTBL coro_cv_vtbl = {
223 562 0, 0, 0, 0,
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 563 coro_cv_free
564};
225 565
226/* the next two functions merely cache the padlists */ 566/* the next two functions merely cache the padlists */
227static void 567static void
228get_padlist (pTHX_ CV *cv) 568get_padlist (pTHX_ CV *cv)
229{ 569{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 570 MAGIC *mg = CORO_MAGIC_cv (cv);
571 AV *av;
231 572
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 573 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 574 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 575 else
235 { 576 {
236#if 0 577#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 578 /* this is probably cleaner? but also slower! */
579 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 580 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 581 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 582 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 583 SvREFCNT_dec (cp);
242#else 584#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 585 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
244#endif 586#endif
245 } 587 }
246} 588}
247 589
248static void 590static void
249put_padlist (pTHX_ CV *cv) 591put_padlist (pTHX_ CV *cv)
250{ 592{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 593 MAGIC *mg = CORO_MAGIC_cv (cv);
594 AV *av;
252 595
253 if (!mg) 596 if (expect_false (!mg))
254 { 597 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 598
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 599 av = (AV *)mg->mg_obj;
262}
263 600
264#define SB do { 601 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 602 av_extend (av, AvFILLp (av) + 1);
266 603
267#define LOAD(state) load_state(aTHX_ (state)); 604 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 605}
269 606
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 607/** load & save, init *******************************************************/
271 608
272static void 609static void
610on_enterleave_call (pTHX_ SV *cb);
611
612static void
273load_state(pTHX_ Coro__State c) 613load_perl (pTHX_ Coro__State c)
274{ 614{
275 PL_dowarn = c->dowarn; 615 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 616 c->slot = 0;
277 617
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 618 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 PL_top_env = c->top_env;
309 619
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 620 GvSV (PL_defgv) = slot->defsv;
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 621 GvAV (PL_defgv) = slot->defav;
312 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 622 GvSV (PL_errgv) = slot->errsv;
623 GvSV (irsgv) = slot->irsgv;
624 GvHV (PL_hintgv) = slot->hinthv;
625
626 #define VAR(name,type) PL_ ## name = slot->name;
627 # include "state.h"
628 #undef VAR
313 629
314 { 630 {
315 dSP; 631 dSP;
632
316 CV *cv; 633 CV *cv;
317 634
318 /* now do the ugly restore mess */ 635 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 636 while (expect_true (cv = (CV *)POPs))
320 { 637 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 638 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 639 CvDEPTH (cv) = PTR2IV (POPs);
327 } 640 CvPADLIST (cv) = (AV *)POPs;
328
329 ++CvDEPTH(cv);
330 } 641 }
331 642
332 PUTBACK; 643 PUTBACK;
333 } 644 }
334}
335 645
646 slf_frame = c->slf_frame;
647 CORO_THROW = c->except;
648
649 if (expect_false (enable_times))
650 {
651 if (expect_false (!times_valid))
652 coro_times_update ();
653
654 coro_times_sub (c);
655 }
656
657 if (expect_false (c->on_enter))
658 {
659 int i;
660
661 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
662 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
663 }
664}
665
336static void 666static void
337save_state(pTHX_ Coro__State c, int flags) 667save_perl (pTHX_ Coro__State c)
338{ 668{
669 if (expect_false (c->on_leave))
670 {
671 int i;
672
673 for (i = AvFILLp (c->on_leave); i >= 0; --i)
674 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
675 }
676
677 times_valid = 0;
678
679 if (expect_false (enable_times))
680 {
681 coro_times_update (); times_valid = 1;
682 coro_times_add (c);
683 }
684
685 c->except = CORO_THROW;
686 c->slf_frame = slf_frame;
687
339 { 688 {
340 dSP; 689 dSP;
341 I32 cxix = cxstack_ix; 690 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 691 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 692 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 694 /*
346 * the worst thing you can imagine happens first - we have to save 695 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :( 696 * (and reinitialize) all cv's in the whole callchain :(
348 */ 697 */
349 698
350 PUSHs (Nullsv); 699 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 700 /* this loop was inspired by pp_caller */
352 for (;;) 701 for (;;)
353 { 702 {
354 while (cxix >= 0) 703 while (expect_true (cxix >= 0))
355 { 704 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 705 PERL_CONTEXT *cx = &ccstk[cxix--];
357 706
358 if (CxTYPE(cx) == CXt_SUB) 707 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
359 { 708 {
360 CV *cv = cx->blk_sub.cv; 709 CV *cv = cx->blk_sub.cv;
710
361 if (CvDEPTH(cv)) 711 if (expect_true (CvDEPTH (cv)))
362 { 712 {
363 EXTEND (SP, CvDEPTH(cv)*2); 713 EXTEND (SP, 3);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 714 PUSHs ((SV *)CvPADLIST (cv));
715 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 716 PUSHs ((SV *)cv);
374 717
718 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 719 get_padlist (aTHX_ cv);
376 } 720 }
377 } 721 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 722 }
387 723
388 if (top_si->si_type == PERLSI_MAIN) 724 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 725 break;
390 726
391 top_si = top_si->si_prev; 727 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 728 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 729 cxix = top_si->si_cxix;
394 } 730 }
395 731
396 PUTBACK; 732 PUTBACK;
397 } 733 }
398 734
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 735 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 736 /* we manually unroll here, as usually 2 slots is enough */
401 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 737 if (SLOT_COUNT >= 1) CXINC;
738 if (SLOT_COUNT >= 2) CXINC;
739 if (SLOT_COUNT >= 3) CXINC;
740 {
741 unsigned int i;
742 for (i = 3; i < SLOT_COUNT; ++i)
743 CXINC;
744 }
745 cxstack_ix -= SLOT_COUNT; /* undo allocation */
402 746
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack; 747 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 748
410 c->op = PL_op; 749 {
411 c->curpad = PL_curpad; 750 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 751
413 c->compcv = PL_compcv; 752 slot->defav = GvAV (PL_defgv);
414 c->stack_base = PL_stack_base; 753 slot->defsv = DEFSV;
415 c->stack_max = PL_stack_max; 754 slot->errsv = ERRSV;
416 c->tmps_stack = PL_tmps_stack; 755 slot->irsgv = GvSV (irsgv);
417 c->tmps_floor = PL_tmps_floor; 756 slot->hinthv = GvHV (PL_hintgv);
418 c->tmps_ix = PL_tmps_ix; 757
419 c->tmps_max = PL_tmps_max; 758 #define VAR(name,type) slot->name = PL_ ## name;
420 c->markstack = PL_markstack; 759 # include "state.h"
421 c->markstack_ptr = PL_markstack_ptr; 760 #undef VAR
422 c->markstack_max = PL_markstack_max; 761 }
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436 c->top_env = PL_top_env;
437} 762}
438 763
439/* 764/*
440 * allocate various perl stacks. This is an exact copy 765 * allocate various perl stacks. This is almost an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 766 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 767 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 768 * not usually need a lot of stackspace.
444 */ 769 */
770#if CORO_PREFER_PERL_FUNCTIONS
771# define coro_init_stacks(thx) init_stacks ()
772#else
445static void 773static void
446coro_init_stacks (pTHX) 774coro_init_stacks (pTHX)
447{ 775{
448 LOCK; 776 PL_curstackinfo = new_stackinfo(32, 8);
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN; 777 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 778 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 779 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 780
455 PL_stack_base = AvARRAY(PL_curstack); 781 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 782 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 783 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 784
459 New(50,PL_tmps_stack,96,SV*); 785 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 786 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 787 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 788 PL_tmps_max = 32;
463 789
464 New(54,PL_markstack,16,I32); 790 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 791 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 792 PL_markstack_max = PL_markstack + 16;
467 793
468#ifdef SET_MARK_OFFSET 794#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 795 SET_MARK_OFFSET;
470#endif 796#endif
471 797
472 New(54,PL_scopestack,16,I32); 798 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 799 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 800 PL_scopestack_max = 8;
475 801
476 New(54,PL_savestack,96,ANY); 802 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 803 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 804 PL_savestack_max = 24;
479 805
480#if PERL_VERSION < 9 806#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 807 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 808 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 809 PL_retstack_max = 4;
484#endif 810#endif
485
486 UNLOCK;
487} 811}
812#endif
488 813
489/* 814/*
490 * destroy the stacks, the callchain etc... 815 * destroy the stacks, the callchain etc...
491 */ 816 */
492static void 817static void
493destroy_stacks(pTHX) 818coro_destruct_stacks (pTHX)
494{ 819{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next) 820 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 821 PL_curstackinfo = PL_curstackinfo->si_next;
508 822
509 while (PL_curstackinfo) 823 while (PL_curstackinfo)
510 { 824 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 825 PERL_SI *p = PL_curstackinfo->si_prev;
512 826
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 827 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 828 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 829
525 Safefree (PL_curstackinfo->si_cxstack); 830 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 831 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 832 PL_curstackinfo = p;
528 } 833 }
529 834
530 Safefree (PL_tmps_stack); 835 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 836 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 837 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 838 Safefree (PL_savestack);
534#if PERL_VERSION < 9 839#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 840 Safefree (PL_retstack);
536#endif 841#endif
537} 842}
538 843
539static void 844#define CORO_RSS \
540allocate_stack (Coro__State ctx, int alloc) 845 rss += sizeof (SYM (curstackinfo)); \
541{ 846 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
542 coro_stack *stack; 847 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
848 rss += SYM (tmps_max) * sizeof (SV *); \
849 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
850 rss += SYM (scopestack_max) * sizeof (I32); \
851 rss += SYM (savestack_max) * sizeof (ANY);
543 852
544 New (0, stack, 1, coro_stack); 853static size_t
854coro_rss (pTHX_ struct coro *coro)
855{
856 size_t rss = sizeof (*coro);
545 857
546 stack->refcnt = 1; 858 if (coro->mainstack)
547 stack->usecnt = 1;
548 stack->gencnt = ctx->gencnt = 0;
549
550 if (alloc)
551 { 859 {
552#if HAVE_MMAP 860 if (coro->flags & CF_RUNNING)
553 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555 if (stack->sptr != (void *)-1)
556 { 861 {
557# if STACKGUARD 862 #define SYM(sym) PL_ ## sym
558 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 863 CORO_RSS;
559# endif 864 #undef SYM
560 } 865 }
561 else 866 else
562#endif
563 { 867 {
564 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 868 #define SYM(sym) coro->slot->sym
565 New (0, stack->sptr, STACKSIZE, long); 869 CORO_RSS;
870 #undef SYM
566 } 871 }
567 } 872 }
568 else
569 stack->sptr = 0;
570 873
571 ctx->stack = stack; 874 return rss;
572} 875}
573 876
877/** coroutine stack handling ************************************************/
878
879static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
880static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
881static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
882
883/* apparently < 5.8.8 */
884#ifndef MgPV_nolen_const
885#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
886 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
887 (const char*)(mg)->mg_ptr)
888#endif
889
890/*
891 * This overrides the default magic get method of %SIG elements.
892 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
893 * and instead of trying to save and restore the hash elements, we just provide
894 * readback here.
895 */
574static void 896static int
575deallocate_stack (Coro__State ctx) 897coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
576{ 898{
577 coro_stack *stack = ctx->stack; 899 const char *s = MgPV_nolen_const (mg);
578 900
579 ctx->stack = 0; 901 if (*s == '_')
580
581 if (stack)
582 { 902 {
583 if (!--stack->refcnt) 903 SV **svp = 0;
904
905 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
906 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
907
908 if (svp)
584 { 909 {
585#ifdef HAVE_MMAP 910 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
586 if (stack->ssize > 0 && stack->sptr) 911 return 0;
587 munmap (stack->sptr, stack->ssize);
588 else
589#endif
590 Safefree (stack->sptr);
591
592 Safefree (stack);
593 } 912 }
594 else if (ctx->gencnt == stack->gencnt) 913 }
595 --stack->usecnt; 914
915 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
916}
917
918static int
919coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
920{
921 const char *s = MgPV_nolen_const (mg);
922
923 if (*s == '_')
596 } 924 {
597} 925 SV **svp = 0;
598 926
927 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
928 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
929
930 if (svp)
931 {
932 SV *old = *svp;
933 *svp = 0;
934 SvREFCNT_dec (old);
935 return 0;
936 }
937 }
938
939 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
940}
941
599static void 942static int
600setup_coro (void *arg) 943coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
944{
945 const char *s = MgPV_nolen_const (mg);
946
947 if (*s == '_')
948 {
949 SV **svp = 0;
950
951 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
952 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
953
954 if (svp)
955 {
956 SV *old = *svp;
957 *svp = SvOK (sv) ? newSVsv (sv) : 0;
958 SvREFCNT_dec (old);
959 return 0;
960 }
961 }
962
963 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
964}
965
966static void
967prepare_nop (pTHX_ struct coro_transfer_args *ta)
968{
969 /* kind of mega-hacky, but works */
970 ta->next = ta->prev = (struct coro *)ta;
971}
972
973static int
974slf_check_nop (pTHX_ struct CoroSLF *frame)
975{
976 return 0;
977}
978
979static int
980slf_check_repeat (pTHX_ struct CoroSLF *frame)
981{
982 return 1;
983}
984
985static UNOP coro_setup_op;
986
987static void NOINLINE /* noinline to keep it out of the transfer fast path */
988coro_setup (pTHX_ struct coro *coro)
601{ 989{
602 /* 990 /*
603 * emulate part of the perl startup here. 991 * emulate part of the perl startup here.
604 */ 992 */
605 dTHX;
606 dSP;
607 Coro__State ctx = (Coro__State)arg;
608 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610 coro_init_stacks (aTHX); 993 coro_init_stacks (aTHX);
611 /*PL_curcop = 0;*/ 994
612 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 995 PL_runops = RUNOPS_DEFAULT;
613 SvREFCNT_dec (GvAV (PL_defgv)); 996 PL_curcop = &PL_compiling;
997 PL_in_eval = EVAL_NULL;
998 PL_comppad = 0;
999 PL_comppad_name = 0;
1000 PL_comppad_name_fill = 0;
1001 PL_comppad_name_floor = 0;
1002 PL_curpm = 0;
1003 PL_curpad = 0;
1004 PL_localizing = 0;
1005 PL_dirty = 0;
1006 PL_restartop = 0;
1007#if PERL_VERSION_ATLEAST (5,10,0)
1008 PL_parser = 0;
1009#endif
1010 PL_hints = 0;
1011
1012 /* recreate the die/warn hooks */
1013 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1014 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1015
1016 GvSV (PL_defgv) = newSV (0);
614 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 1017 GvAV (PL_defgv) = coro->args; coro->args = 0;
1018 GvSV (PL_errgv) = newSV (0);
1019 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1020 GvHV (PL_hintgv) = 0;
1021 PL_rs = newSVsv (GvSV (irsgv));
1022 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
615 1023
616 SPAGAIN; 1024 {
1025 dSP;
1026 UNOP myop;
617 1027
1028 Zero (&myop, 1, UNOP);
1029 myop.op_next = Nullop;
1030 myop.op_type = OP_ENTERSUB;
1031 myop.op_flags = OPf_WANT_VOID;
1032
1033 PUSHMARK (SP);
1034 PUSHs ((SV *)coro->startcv);
1035 PUTBACK;
1036 PL_op = (OP *)&myop;
1037 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1038 }
1039
1040 /* this newly created coroutine might be run on an existing cctx which most
1041 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1042 */
1043 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1044 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1045
1046 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1047 coro_setup_op.op_next = PL_op;
1048 coro_setup_op.op_type = OP_ENTERSUB;
1049 coro_setup_op.op_ppaddr = pp_slf;
1050 /* no flags etc. required, as an init function won't be called */
1051
1052 PL_op = (OP *)&coro_setup_op;
1053
1054 /* copy throw, in case it was set before coro_setup */
1055 CORO_THROW = coro->except;
1056
1057 if (expect_false (enable_times))
1058 {
1059 coro_times_update ();
1060 coro_times_sub (coro);
1061 }
1062}
1063
1064static void
1065coro_unwind_stacks (pTHX)
1066{
1067 if (!IN_DESTRUCT)
1068 {
1069 /* restore all saved variables and stuff */
1070 LEAVE_SCOPE (0);
1071 assert (PL_tmps_floor == -1);
1072
1073 /* free all temporaries */
1074 FREETMPS;
1075 assert (PL_tmps_ix == -1);
1076
1077 /* unwind all extra stacks */
1078 POPSTACK_TO (PL_mainstack);
1079
1080 /* unwind main stack */
1081 dounwind (-1);
1082 }
1083}
1084
1085static void
1086coro_destruct_perl (pTHX_ struct coro *coro)
1087{
1088 SV *svf [9];
1089
1090 {
1091 struct coro *current = SvSTATE_current;
1092
1093 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1094
1095 save_perl (aTHX_ current);
1096 load_perl (aTHX_ coro);
1097
1098 coro_unwind_stacks (aTHX);
1099 coro_destruct_stacks (aTHX);
1100
1101 // now save some sv's to be free'd later
1102 svf [0] = GvSV (PL_defgv);
1103 svf [1] = (SV *)GvAV (PL_defgv);
1104 svf [2] = GvSV (PL_errgv);
1105 svf [3] = (SV *)PL_defoutgv;
1106 svf [4] = PL_rs;
1107 svf [5] = GvSV (irsgv);
1108 svf [6] = (SV *)GvHV (PL_hintgv);
1109 svf [7] = PL_diehook;
1110 svf [8] = PL_warnhook;
1111 assert (9 == sizeof (svf) / sizeof (*svf));
1112
1113 load_perl (aTHX_ current);
1114 }
1115
1116 {
1117 unsigned int i;
1118
1119 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1120 SvREFCNT_dec (svf [i]);
1121
1122 SvREFCNT_dec (coro->saved_deffh);
1123 SvREFCNT_dec (coro->rouse_cb);
1124 SvREFCNT_dec (coro->invoke_cb);
1125 SvREFCNT_dec (coro->invoke_av);
1126 }
1127}
1128
1129INLINE void
1130free_coro_mortal (pTHX)
1131{
1132 if (expect_true (coro_mortal))
1133 {
1134 SvREFCNT_dec (coro_mortal);
1135 coro_mortal = 0;
1136 }
1137}
1138
1139static int
1140runops_trace (pTHX)
1141{
1142 COP *oldcop = 0;
1143 int oldcxix = -2;
1144
1145 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1146 {
1147 PERL_ASYNC_CHECK ();
1148
1149 if (cctx_current->flags & CC_TRACE_ALL)
1150 {
1151 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1152 {
1153 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1154 SV **bot, **top;
1155 AV *av = newAV (); /* return values */
1156 SV **cb;
1157 dSP;
1158
1159 GV *gv = CvGV (cx->blk_sub.cv);
1160 SV *fullname = sv_2mortal (newSV (0));
1161 if (isGV (gv))
1162 gv_efullname3 (fullname, gv, 0);
1163
1164 bot = PL_stack_base + cx->blk_oldsp + 1;
1165 top = cx->blk_gimme == G_ARRAY ? SP + 1
1166 : cx->blk_gimme == G_SCALAR ? bot + 1
1167 : bot;
1168
1169 av_extend (av, top - bot);
1170 while (bot < top)
1171 av_push (av, SvREFCNT_inc_NN (*bot++));
1172
1173 PL_runops = RUNOPS_DEFAULT;
1174 ENTER;
1175 SAVETMPS;
1176 EXTEND (SP, 3);
1177 PUSHMARK (SP);
1178 PUSHs (&PL_sv_no);
1179 PUSHs (fullname);
1180 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1181 PUTBACK;
1182 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1183 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1184 SPAGAIN;
1185 FREETMPS;
1186 LEAVE;
1187 PL_runops = runops_trace;
1188 }
1189
1190 if (oldcop != PL_curcop)
1191 {
1192 oldcop = PL_curcop;
1193
1194 if (PL_curcop != &PL_compiling)
1195 {
1196 SV **cb;
1197
1198 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1199 {
1200 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1201
1202 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1203 {
1204 dSP;
1205 GV *gv = CvGV (cx->blk_sub.cv);
1206 SV *fullname = sv_2mortal (newSV (0));
1207
1208 if (isGV (gv))
1209 gv_efullname3 (fullname, gv, 0);
1210
1211 PL_runops = RUNOPS_DEFAULT;
1212 ENTER;
1213 SAVETMPS;
1214 EXTEND (SP, 3);
1215 PUSHMARK (SP);
1216 PUSHs (&PL_sv_yes);
1217 PUSHs (fullname);
1218 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1219 PUTBACK;
1220 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1221 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1222 SPAGAIN;
1223 FREETMPS;
1224 LEAVE;
1225 PL_runops = runops_trace;
1226 }
1227
1228 oldcxix = cxstack_ix;
1229 }
1230
1231 if (cctx_current->flags & CC_TRACE_LINE)
1232 {
1233 dSP;
1234
1235 PL_runops = RUNOPS_DEFAULT;
1236 ENTER;
1237 SAVETMPS;
1238 EXTEND (SP, 3);
1239 PL_runops = RUNOPS_DEFAULT;
1240 PUSHMARK (SP);
1241 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1242 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1243 PUTBACK;
1244 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1245 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1246 SPAGAIN;
1247 FREETMPS;
1248 LEAVE;
1249 PL_runops = runops_trace;
1250 }
1251 }
1252 }
1253 }
1254 }
1255
1256 TAINT_NOT;
1257 return 0;
1258}
1259
1260static struct CoroSLF cctx_ssl_frame;
1261
1262static void
1263slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1264{
1265 ta->prev = 0;
1266}
1267
1268static int
1269slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1270{
1271 *frame = cctx_ssl_frame;
1272
1273 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1274}
1275
1276/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1277static void NOINLINE
1278cctx_prepare (pTHX)
1279{
1280 PL_top_env = &PL_start_env;
1281
1282 if (cctx_current->flags & CC_TRACE)
1283 PL_runops = runops_trace;
1284
1285 /* we already must be executing an SLF op, there is no other valid way
1286 * that can lead to creation of a new cctx */
1287 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1288 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1289
1290 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1291 cctx_ssl_frame = slf_frame;
1292
1293 slf_frame.prepare = slf_prepare_set_stacklevel;
1294 slf_frame.check = slf_check_set_stacklevel;
1295}
1296
1297/* the tail of transfer: execute stuff we can only do after a transfer */
1298INLINE void
1299transfer_tail (pTHX)
1300{
1301 free_coro_mortal (aTHX);
1302}
1303
1304/*
1305 * this is a _very_ stripped down perl interpreter ;)
1306 */
1307static void
1308cctx_run (void *arg)
1309{
1310#ifdef USE_ITHREADS
1311# if CORO_PTHREAD
1312 PERL_SET_CONTEXT (coro_thx);
1313# endif
1314#endif
1315 {
1316 dTHX;
1317
1318 /* normally we would need to skip the entersub here */
1319 /* not doing so will re-execute it, which is exactly what we want */
1320 /* PL_nop = PL_nop->op_next */
1321
1322 /* inject a fake subroutine call to cctx_init */
1323 cctx_prepare (aTHX);
1324
1325 /* cctx_run is the alternative tail of transfer() */
1326 transfer_tail (aTHX);
1327
1328 /* somebody or something will hit me for both perl_run and PL_restartop */
1329 PL_restartop = PL_op;
1330 perl_run (PL_curinterp);
1331 /*
1332 * Unfortunately, there is no way to get at the return values of the
1333 * coro body here, as perl_run destroys these
1334 */
1335
1336 /*
1337 * If perl-run returns we assume exit() was being called or the coro
1338 * fell off the end, which seems to be the only valid (non-bug)
1339 * reason for perl_run to return. We try to exit by jumping to the
1340 * bootstrap-time "top" top_env, as we cannot restore the "main"
1341 * coroutine as Coro has no such concept.
1342 * This actually isn't valid with the pthread backend, but OSes requiring
1343 * that backend are too broken to do it in a standards-compliant way.
1344 */
1345 PL_top_env = main_top_env;
1346 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1347 }
1348}
1349
1350static coro_cctx *
1351cctx_new ()
1352{
1353 coro_cctx *cctx;
1354
1355 ++cctx_count;
1356 New (0, cctx, 1, coro_cctx);
1357
1358 cctx->gen = cctx_gen;
1359 cctx->flags = 0;
1360 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1361
1362 return cctx;
1363}
1364
1365/* create a new cctx only suitable as source */
1366static coro_cctx *
1367cctx_new_empty ()
1368{
1369 coro_cctx *cctx = cctx_new ();
1370
1371 cctx->sptr = 0;
1372 coro_create (&cctx->cctx, 0, 0, 0, 0);
1373
1374 return cctx;
1375}
1376
1377/* create a new cctx suitable as destination/running a perl interpreter */
1378static coro_cctx *
1379cctx_new_run ()
1380{
1381 coro_cctx *cctx = cctx_new ();
1382 void *stack_start;
1383 size_t stack_size;
1384
1385#if HAVE_MMAP
1386 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1387 /* mmap supposedly does allocate-on-write for us */
1388 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1389
1390 if (cctx->sptr != (void *)-1)
1391 {
1392 #if CORO_STACKGUARD
1393 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1394 #endif
1395 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1396 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1397 cctx->flags |= CC_MAPPED;
1398 }
1399 else
1400#endif
1401 {
1402 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1403 New (0, cctx->sptr, cctx_stacksize, long);
1404
1405 if (!cctx->sptr)
1406 {
1407 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1408 _exit (EXIT_FAILURE);
1409 }
1410
1411 stack_start = cctx->sptr;
1412 stack_size = cctx->ssize;
1413 }
1414
1415 #if CORO_USE_VALGRIND
1416 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1417 #endif
1418
1419 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1420
1421 return cctx;
1422}
1423
1424static void
1425cctx_destroy (coro_cctx *cctx)
1426{
1427 if (!cctx)
1428 return;
1429
1430 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1431
1432 --cctx_count;
1433 coro_destroy (&cctx->cctx);
1434
1435 /* coro_transfer creates new, empty cctx's */
618 if (ctx->stack) 1436 if (cctx->sptr)
1437 {
1438 #if CORO_USE_VALGRIND
1439 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1440 #endif
1441
1442#if HAVE_MMAP
1443 if (cctx->flags & CC_MAPPED)
1444 munmap (cctx->sptr, cctx->ssize);
1445 else
1446#endif
1447 Safefree (cctx->sptr);
619 { 1448 }
620 ctx->cursp = 0;
621 1449
1450 Safefree (cctx);
1451}
1452
1453/* wether this cctx should be destructed */
1454#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1455
1456static coro_cctx *
1457cctx_get (pTHX)
1458{
1459 while (expect_true (cctx_first))
1460 {
1461 coro_cctx *cctx = cctx_first;
1462 cctx_first = cctx->next;
1463 --cctx_idle;
1464
1465 if (expect_true (!CCTX_EXPIRED (cctx)))
1466 return cctx;
1467
1468 cctx_destroy (cctx);
1469 }
1470
1471 return cctx_new_run ();
1472}
1473
1474static void
1475cctx_put (coro_cctx *cctx)
1476{
1477 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1478
1479 /* free another cctx if overlimit */
1480 if (expect_false (cctx_idle >= cctx_max_idle))
1481 {
1482 coro_cctx *first = cctx_first;
1483 cctx_first = first->next;
1484 --cctx_idle;
1485
1486 cctx_destroy (first);
1487 }
1488
1489 ++cctx_idle;
1490 cctx->next = cctx_first;
1491 cctx_first = cctx;
1492}
1493
1494/** coroutine switching *****************************************************/
1495
1496static void
1497transfer_check (pTHX_ struct coro *prev, struct coro *next)
1498{
1499 /* TODO: throwing up here is considered harmful */
1500
1501 if (expect_true (prev != next))
1502 {
1503 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1504 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1505
1506 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1507 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1508
1509#if !PERL_VERSION_ATLEAST (5,10,0)
1510 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1511 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1512#endif
1513 }
1514}
1515
1516/* always use the TRANSFER macro */
1517static void NOINLINE /* noinline so we have a fixed stackframe */
1518transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1519{
1520 dSTACKLEVEL;
1521
1522 /* sometimes transfer is only called to set idle_sp */
1523 if (expect_false (!prev))
1524 {
1525 cctx_current->idle_sp = STACKLEVEL;
1526 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1527 }
1528 else if (expect_true (prev != next))
1529 {
1530 coro_cctx *cctx_prev;
1531
1532 if (expect_false (prev->flags & CF_NEW))
1533 {
1534 /* create a new empty/source context */
1535 prev->flags &= ~CF_NEW;
1536 prev->flags |= CF_RUNNING;
1537 }
1538
1539 prev->flags &= ~CF_RUNNING;
1540 next->flags |= CF_RUNNING;
1541
1542 /* first get rid of the old state */
1543 save_perl (aTHX_ prev);
1544
1545 if (expect_false (next->flags & CF_NEW))
1546 {
1547 /* need to start coroutine */
1548 next->flags &= ~CF_NEW;
1549 /* setup coroutine call */
1550 coro_setup (aTHX_ next);
1551 }
1552 else
1553 load_perl (aTHX_ next);
1554
1555 /* possibly untie and reuse the cctx */
1556 if (expect_true (
1557 cctx_current->idle_sp == STACKLEVEL
1558 && !(cctx_current->flags & CC_TRACE)
1559 && !force_cctx
1560 ))
1561 {
1562 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1563 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1564
1565 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1566 /* without this the next cctx_get might destroy the running cctx while still in use */
1567 if (expect_false (CCTX_EXPIRED (cctx_current)))
1568 if (expect_true (!next->cctx))
1569 next->cctx = cctx_get (aTHX);
1570
1571 cctx_put (cctx_current);
1572 }
1573 else
1574 prev->cctx = cctx_current;
1575
1576 ++next->usecount;
1577
1578 cctx_prev = cctx_current;
1579 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1580
1581 next->cctx = 0;
1582
1583 if (expect_false (cctx_prev != cctx_current))
1584 {
1585 cctx_prev->top_env = PL_top_env;
1586 PL_top_env = cctx_current->top_env;
1587 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1588 }
1589
1590 transfer_tail (aTHX);
1591 }
1592}
1593
1594#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1595#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1596
1597/** high level stuff ********************************************************/
1598
1599static int
1600coro_state_destroy (pTHX_ struct coro *coro)
1601{
1602 if (coro->flags & CF_DESTROYED)
1603 return 0;
1604
1605 if (coro->on_destroy && !PL_dirty)
1606 coro->on_destroy (aTHX_ coro);
1607
1608 coro->flags |= CF_DESTROYED;
1609
1610 if (coro->flags & CF_READY)
1611 {
1612 /* reduce nready, as destroying a ready coro effectively unreadies it */
1613 /* alternative: look through all ready queues and remove the coro */
1614 --coro_nready;
1615 }
1616 else
1617 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1618
1619 if (coro->mainstack
1620 && coro->mainstack != main_mainstack
1621 && coro->slot
1622 && !PL_dirty)
1623 coro_destruct_perl (aTHX_ coro);
1624
1625 cctx_destroy (coro->cctx);
1626 SvREFCNT_dec (coro->startcv);
1627 SvREFCNT_dec (coro->args);
1628 SvREFCNT_dec (CORO_THROW);
1629
1630 if (coro->next) coro->next->prev = coro->prev;
1631 if (coro->prev) coro->prev->next = coro->next;
1632 if (coro == coro_first) coro_first = coro->next;
1633
1634 return 1;
1635}
1636
1637static int
1638coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 struct coro *coro = (struct coro *)mg->mg_ptr;
1641 mg->mg_ptr = 0;
1642
1643 coro->hv = 0;
1644
1645 if (--coro->refcnt < 0)
1646 {
1647 coro_state_destroy (aTHX_ coro);
1648 Safefree (coro);
1649 }
1650
1651 return 0;
1652}
1653
1654static int
1655coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1656{
1657 struct coro *coro = (struct coro *)mg->mg_ptr;
1658
1659 ++coro->refcnt;
1660
1661 return 0;
1662}
1663
1664static MGVTBL coro_state_vtbl = {
1665 0, 0, 0, 0,
1666 coro_state_free,
1667 0,
1668#ifdef MGf_DUP
1669 coro_state_dup,
1670#else
1671# define MGf_DUP 0
1672#endif
1673};
1674
1675static void
1676prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1677{
1678 ta->prev = SvSTATE (prev_sv);
1679 ta->next = SvSTATE (next_sv);
1680 TRANSFER_CHECK (*ta);
1681}
1682
1683static void
1684api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1685{
1686 struct coro_transfer_args ta;
1687
1688 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1689 TRANSFER (ta, 1);
1690}
1691
1692/*****************************************************************************/
1693/* gensub: simple closure generation utility */
1694
1695#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1696
1697/* create a closure from XS, returns a code reference */
1698/* the arg can be accessed via GENSUB_ARG from the callback */
1699/* the callback must use dXSARGS/XSRETURN */
1700static SV *
1701gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1702{
1703 CV *cv = (CV *)newSV (0);
1704
1705 sv_upgrade ((SV *)cv, SVt_PVCV);
1706
1707 CvANON_on (cv);
1708 CvISXSUB_on (cv);
1709 CvXSUB (cv) = xsub;
1710 GENSUB_ARG = arg;
1711
1712 return newRV_noinc ((SV *)cv);
1713}
1714
1715/** Coro ********************************************************************/
1716
1717INLINE void
1718coro_enq (pTHX_ struct coro *coro)
1719{
1720 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1721
1722 SvREFCNT_inc_NN (coro->hv);
1723
1724 coro->next_ready = 0;
1725 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1726 ready [1] = coro;
1727}
1728
1729INLINE struct coro *
1730coro_deq (pTHX)
1731{
1732 int prio;
1733
1734 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1735 {
1736 struct coro **ready = coro_ready [prio];
1737
1738 if (ready [0])
1739 {
1740 struct coro *coro = ready [0];
1741 ready [0] = coro->next_ready;
1742 return coro;
1743 }
1744 }
1745
1746 return 0;
1747}
1748
1749static int
1750api_ready (pTHX_ SV *coro_sv)
1751{
1752 struct coro *coro;
1753 SV *sv_hook;
1754 void (*xs_hook)(void);
1755
1756 coro = SvSTATE (coro_sv);
1757
1758 if (coro->flags & CF_READY)
1759 return 0;
1760
1761 coro->flags |= CF_READY;
1762
1763 sv_hook = coro_nready ? 0 : coro_readyhook;
1764 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1765
1766 coro_enq (aTHX_ coro);
1767 ++coro_nready;
1768
1769 if (sv_hook)
1770 {
1771 dSP;
1772
1773 ENTER;
1774 SAVETMPS;
1775
622 PUSHMARK(SP); 1776 PUSHMARK (SP);
623 PUTBACK; 1777 PUTBACK;
624 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1778 call_sv (sv_hook, G_VOID | G_DISCARD);
625 1779
626 if (SvTRUE (ERRSV)) 1780 FREETMPS;
627 croak (NULL); 1781 LEAVE;
628 else
629 croak ("FATAL: CCTXT coroutine returned!");
630 }
631 else
632 { 1782 }
633 UNOP myop;
634 1783
635 Zero(&myop, 1, UNOP); 1784 if (xs_hook)
636 myop.op_next = Nullop; 1785 xs_hook ();
637 myop.op_flags = OPf_WANT_VOID;
638 1786
639 PL_op = (OP *)&myop; 1787 return 1;
1788}
640 1789
641 PUSHMARK(SP); 1790static int
642 XPUSHs (sub_init); 1791api_is_ready (pTHX_ SV *coro_sv)
643 /* 1792{
644 * the next line is slightly wrong, as PL_op->op_next 1793 return !!(SvSTATE (coro_sv)->flags & CF_READY);
645 * is actually being executed so we skip the first op. 1794}
646 * that doesn't matter, though, since it is only
647 * pp_nextstate and we never return...
648 * ah yes, and I don't care anyways ;)
649 */
650 PUTBACK;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653 1795
654 ENTER; /* necessary e.g. for dounwind */ 1796/* expects to own a reference to next->hv */
1797INLINE void
1798prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1799{
1800 SV *prev_sv = SvRV (coro_current);
1801
1802 ta->prev = SvSTATE_hv (prev_sv);
1803 ta->next = next;
1804
1805 TRANSFER_CHECK (*ta);
1806
1807 SvRV_set (coro_current, (SV *)next->hv);
1808
1809 free_coro_mortal (aTHX);
1810 coro_mortal = prev_sv;
1811}
1812
1813static void
1814prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1815{
1816 for (;;)
655 } 1817 {
656} 1818 struct coro *next = coro_deq (aTHX);
657 1819
658static void 1820 if (expect_true (next))
659continue_coro (void *arg)
660{
661 /*
662 * this is a _very_ stripped down perl interpreter ;)
663 */
664 dTHX;
665 Coro__State ctx = (Coro__State)arg;
666
667 PL_top_env = &PL_start_env;
668
669 ctx->cursp = 0;
670 PL_op = PL_op->op_next;
671 CALLRUNOPS(aTHX);
672
673 abort ();
674}
675
676/* never call directly, always through the coro_state_transfer global variable */
677static void
678transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSTACKLEVEL;
681
682 if (prev != next)
683 {
684 /* has this coro been created yet? */
685 if (next->mainstack)
686 { 1821 {
687 LOCK; 1822 /* cannot transfer to destroyed coros, skip and look for next */
688 SAVE (prev, flags); 1823 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
689 LOAD (next); 1824 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
690 UNLOCK; 1825 else
691
692 /* mark this state as in-use */
693 next->mainstack = 0;
694 next->tmps_ix = -2;
695
696 /* stacklevel changed? if yes, grab the stack for us! */
697 if (flags & TRANSFER_SAVE_CCTXT)
698 { 1826 {
699 if (!prev->stack) 1827 next->flags &= ~CF_READY;
700 allocate_stack (prev, 0); 1828 --coro_nready;
701 else if (prev->cursp != stacklevel 1829
702 && prev->stack->usecnt > 1) 1830 prepare_schedule_to (aTHX_ ta, next);
703 { 1831 break;
704 prev->gencnt = ++prev->stack->gencnt;
705 prev->stack->usecnt = 1;
706 }
707
708 /* has our stack been invalidated? */
709 if (next->stack && next->stack->gencnt != next->gencnt)
710 {
711 deallocate_stack (next);
712 allocate_stack (next, 1);
713 coro_create (&(next->stack->cctx),
714 continue_coro, (void *)next,
715 next->stack->sptr, labs (next->stack->ssize));
716 }
717
718 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
719 prev->cursp = stacklevel;
720 /* don't add any code here */
721 } 1832 }
722 else
723 next->cursp = stacklevel;
724 } 1833 }
725 else if (next->tmps_ix == -2)
726 croak ("tried to transfer to running coroutine");
727 else 1834 else
728 { 1835 {
729 LOCK; 1836 /* nothing to schedule: call the idle handler */
730 SAVE (prev, -1); /* first get rid of the old state */ 1837 if (SvROK (sv_idle)
731 UNLOCK; 1838 && SvOBJECT (SvRV (sv_idle)))
732
733 /* create the coroutine for the first time */
734 if (flags & TRANSFER_SAVE_CCTXT)
735 { 1839 {
736 if (!prev->stack) 1840 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
737 allocate_stack (prev, 0); 1841 api_ready (aTHX_ SvRV (sv_idle));
738 1842 --coro_nready;
739 /* the new coroutine starts with start_env again */
740 PL_top_env = &PL_start_env;
741
742 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743 {
744 setup_coro (next);
745 next->cursp = stacklevel;
746
747 prev->stack->refcnt++;
748 prev->stack->usecnt++;
749 next->stack = prev->stack;
750 next->gencnt = prev->gencnt;
751 }
752 else
753 {
754 assert (!next->stack);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 setup_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760 prev->cursp = stacklevel;
761 /* don't add any code here */
762 }
763 } 1843 }
764 else 1844 else
765 { 1845 {
766 setup_coro (next); 1846 dSP;
767 next->cursp = stacklevel; 1847
1848 ENTER;
1849 SAVETMPS;
1850
1851 PUSHMARK (SP);
1852 PUTBACK;
1853 call_sv (sv_idle, G_VOID | G_DISCARD);
1854
1855 FREETMPS;
1856 LEAVE;
768 } 1857 }
769 } 1858 }
770 } 1859 }
1860}
771 1861
772 LOCK; 1862INLINE void
1863prepare_cede (pTHX_ struct coro_transfer_args *ta)
1864{
1865 api_ready (aTHX_ coro_current);
1866 prepare_schedule (aTHX_ ta);
1867}
1868
1869INLINE void
1870prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1871{
1872 SV *prev = SvRV (coro_current);
1873
773 if (coro_mortal) 1874 if (coro_nready)
774 {
775 SvREFCNT_dec (coro_mortal);
776 coro_mortal = 0;
777 } 1875 {
778 UNLOCK; 1876 prepare_schedule (aTHX_ ta);
779} 1877 api_ready (aTHX_ prev);
780
781/* use this function pointer to call the above function */
782/* this is done to increase chances of the compiler not inlining the call */
783void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
784
785#define SV_CORO(sv,func) \
786 do { \
787 if (SvROK (sv)) \
788 sv = SvRV (sv); \
789 \
790 if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791 { \
792 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793 \
794 if (!he) \
795 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796 \
797 (sv) = SvRV (HeVAL(he)); \
798 } \
799 \
800 /* must also be changed inside Coro::Cont::yield */ \
801 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803 \
804 } while(0)
805
806static void
807coro_state_destroy (struct coro *coro)
808{
809 if (coro->refcnt--)
810 return;
811
812 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1878 }
814 struct coro temp; 1879 else
1880 prepare_nop (aTHX_ ta);
1881}
815 1882
816 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1883static void
817 LOAD (aTHX_ coro); 1884api_schedule (pTHX)
1885{
1886 struct coro_transfer_args ta;
818 1887
819 destroy_stacks (aTHX); 1888 prepare_schedule (aTHX_ &ta);
1889 TRANSFER (ta, 1);
1890}
820 1891
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1892static void
1893api_schedule_to (pTHX_ SV *coro_sv)
1894{
1895 struct coro_transfer_args ta;
1896 struct coro *next = SvSTATE (coro_sv);
822 1897
823 coro->mainstack = 0;
824 }
825
826 deallocate_stack (coro);
827 SvREFCNT_dec (coro->args); 1898 SvREFCNT_inc_NN (coro_sv);
828 Safefree (coro); 1899 prepare_schedule_to (aTHX_ &ta, next);
829} 1900}
830 1901
831static int 1902static int
832coro_state_clear (SV *sv, MAGIC *mg) 1903api_cede (pTHX)
833{ 1904{
1905 struct coro_transfer_args ta;
1906
1907 prepare_cede (aTHX_ &ta);
1908
1909 if (expect_true (ta.prev != ta.next))
1910 {
1911 TRANSFER (ta, 1);
1912 return 1;
1913 }
1914 else
1915 return 0;
1916}
1917
1918static int
1919api_cede_notself (pTHX)
1920{
1921 if (coro_nready)
1922 {
1923 struct coro_transfer_args ta;
1924
1925 prepare_cede_notself (aTHX_ &ta);
1926 TRANSFER (ta, 1);
1927 return 1;
1928 }
1929 else
1930 return 0;
1931}
1932
1933static void
1934api_trace (pTHX_ SV *coro_sv, int flags)
1935{
1936 struct coro *coro = SvSTATE (coro_sv);
1937
1938 if (coro->flags & CF_RUNNING)
1939 croak ("cannot enable tracing on a running coroutine, caught");
1940
1941 if (flags & CC_TRACE)
1942 {
1943 if (!coro->cctx)
1944 coro->cctx = cctx_new_run ();
1945 else if (!(coro->cctx->flags & CC_TRACE))
1946 croak ("cannot enable tracing on coroutine with custom stack, caught");
1947
1948 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1949 }
1950 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1951 {
1952 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1953
1954 if (coro->flags & CF_RUNNING)
1955 PL_runops = RUNOPS_DEFAULT;
1956 else
1957 coro->slot->runops = RUNOPS_DEFAULT;
1958 }
1959}
1960
1961static void
1962coro_call_on_destroy (pTHX_ struct coro *coro)
1963{
1964 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1965 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1966
1967 if (on_destroyp)
1968 {
1969 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1970
1971 while (AvFILLp (on_destroy) >= 0)
1972 {
1973 dSP; /* don't disturb outer sp */
1974 SV *cb = av_pop (on_destroy);
1975
1976 PUSHMARK (SP);
1977
1978 if (statusp)
1979 {
1980 int i;
1981 AV *status = (AV *)SvRV (*statusp);
1982 EXTEND (SP, AvFILLp (status) + 1);
1983
1984 for (i = 0; i <= AvFILLp (status); ++i)
1985 PUSHs (AvARRAY (status)[i]);
1986 }
1987
1988 PUTBACK;
1989 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1990 }
1991 }
1992}
1993
1994static void
1995slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1996{
1997 int i;
1998 HV *hv = (HV *)SvRV (coro_current);
1999 AV *av = newAV ();
2000
2001 av_extend (av, items - 1);
2002 for (i = 0; i < items; ++i)
2003 av_push (av, SvREFCNT_inc_NN (arg [i]));
2004
2005 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2006
2007 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2008 api_ready (aTHX_ sv_manager);
2009
2010 frame->prepare = prepare_schedule;
2011 frame->check = slf_check_repeat;
2012
2013 /* as a minor optimisation, we could unwind all stacks here */
2014 /* but that puts extra pressure on pp_slf, and is not worth much */
2015 /*coro_unwind_stacks (aTHX);*/
2016}
2017
2018/*****************************************************************************/
2019/* async pool handler */
2020
2021static int
2022slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2023{
2024 HV *hv = (HV *)SvRV (coro_current);
834 struct coro *coro = (struct coro *)mg->mg_ptr; 2025 struct coro *coro = (struct coro *)frame->data;
835 mg->mg_ptr = 0;
836 2026
837 coro_state_destroy (coro); 2027 if (!coro->invoke_cb)
2028 return 1; /* loop till we have invoke */
2029 else
2030 {
2031 hv_store (hv, "desc", sizeof ("desc") - 1,
2032 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2033
2034 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2035
2036 {
2037 dSP;
2038 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2039 PUTBACK;
2040 }
2041
2042 SvREFCNT_dec (GvAV (PL_defgv));
2043 GvAV (PL_defgv) = coro->invoke_av;
2044 coro->invoke_av = 0;
2045
2046 return 0;
2047 }
2048}
2049
2050static void
2051slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2052{
2053 HV *hv = (HV *)SvRV (coro_current);
2054 struct coro *coro = SvSTATE_hv ((SV *)hv);
2055
2056 if (expect_true (coro->saved_deffh))
2057 {
2058 /* subsequent iteration */
2059 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2060 coro->saved_deffh = 0;
2061
2062 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2063 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2064 {
2065 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2066 coro->invoke_av = newAV ();
2067
2068 frame->prepare = prepare_nop;
2069 }
2070 else
2071 {
2072 av_clear (GvAV (PL_defgv));
2073 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2074
2075 coro->prio = 0;
2076
2077 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2078 api_trace (aTHX_ coro_current, 0);
2079
2080 frame->prepare = prepare_schedule;
2081 av_push (av_async_pool, SvREFCNT_inc (hv));
2082 }
2083 }
2084 else
2085 {
2086 /* first iteration, simply fall through */
2087 frame->prepare = prepare_nop;
2088 }
2089
2090 frame->check = slf_check_pool_handler;
2091 frame->data = (void *)coro;
2092}
2093
2094/*****************************************************************************/
2095/* rouse callback */
2096
2097#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2098
2099static void
2100coro_rouse_callback (pTHX_ CV *cv)
2101{
2102 dXSARGS;
2103 SV *data = (SV *)GENSUB_ARG;
2104
2105 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2106 {
2107 /* first call, set args */
2108 SV *coro = SvRV (data);
2109 AV *av = newAV ();
2110
2111 SvRV_set (data, (SV *)av);
2112
2113 /* better take a full copy of the arguments */
2114 while (items--)
2115 av_store (av, items, newSVsv (ST (items)));
2116
2117 api_ready (aTHX_ coro);
2118 SvREFCNT_dec (coro);
2119 }
2120
2121 XSRETURN_EMPTY;
2122}
2123
2124static int
2125slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2126{
2127 SV *data = (SV *)frame->data;
2128
2129 if (CORO_THROW)
2130 return 0;
2131
2132 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2133 return 1;
2134
2135 /* now push all results on the stack */
2136 {
2137 dSP;
2138 AV *av = (AV *)SvRV (data);
2139 int i;
2140
2141 EXTEND (SP, AvFILLp (av) + 1);
2142 for (i = 0; i <= AvFILLp (av); ++i)
2143 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2144
2145 /* we have stolen the elements, so set length to zero and free */
2146 AvFILLp (av) = -1;
2147 av_undef (av);
2148
2149 PUTBACK;
2150 }
838 2151
839 return 0; 2152 return 0;
840} 2153}
841 2154
2155static void
2156slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2157{
2158 SV *cb;
2159
2160 if (items)
2161 cb = arg [0];
2162 else
2163 {
2164 struct coro *coro = SvSTATE_current;
2165
2166 if (!coro->rouse_cb)
2167 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2168
2169 cb = sv_2mortal (coro->rouse_cb);
2170 coro->rouse_cb = 0;
2171 }
2172
2173 if (!SvROK (cb)
2174 || SvTYPE (SvRV (cb)) != SVt_PVCV
2175 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2176 croak ("Coro::rouse_wait called with illegal callback argument,");
2177
2178 {
2179 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2180 SV *data = (SV *)GENSUB_ARG;
2181
2182 frame->data = (void *)data;
2183 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2184 frame->check = slf_check_rouse_wait;
2185 }
2186}
2187
2188static SV *
2189coro_new_rouse_cb (pTHX)
2190{
2191 HV *hv = (HV *)SvRV (coro_current);
2192 struct coro *coro = SvSTATE_hv (hv);
2193 SV *data = newRV_inc ((SV *)hv);
2194 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2195
2196 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2197 SvREFCNT_dec (data); /* magicext increases the refcount */
2198
2199 SvREFCNT_dec (coro->rouse_cb);
2200 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2201
2202 return cb;
2203}
2204
2205/*****************************************************************************/
2206/* schedule-like-function opcode (SLF) */
2207
2208static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2209static const CV *slf_cv;
2210static SV **slf_argv;
2211static int slf_argc, slf_arga; /* count, allocated */
2212static I32 slf_ax; /* top of stack, for restore */
2213
2214/* this restores the stack in the case we patched the entersub, to */
2215/* recreate the stack frame as perl will on following calls */
2216/* since entersub cleared the stack */
2217static OP *
2218pp_restore (pTHX)
2219{
2220 int i;
2221 SV **SP = PL_stack_base + slf_ax;
2222
2223 PUSHMARK (SP);
2224
2225 EXTEND (SP, slf_argc + 1);
2226
2227 for (i = 0; i < slf_argc; ++i)
2228 PUSHs (sv_2mortal (slf_argv [i]));
2229
2230 PUSHs ((SV *)CvGV (slf_cv));
2231
2232 RETURNOP (slf_restore.op_first);
2233}
2234
2235static void
2236slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2237{
2238 SV **arg = (SV **)slf_frame.data;
2239
2240 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2241}
2242
2243static void
2244slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 if (items != 2)
2247 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2248
2249 frame->prepare = slf_prepare_transfer;
2250 frame->check = slf_check_nop;
2251 frame->data = (void *)arg; /* let's hope it will stay valid */
2252}
2253
2254static void
2255slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2256{
2257 frame->prepare = prepare_schedule;
2258 frame->check = slf_check_nop;
2259}
2260
2261static void
2262slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2263{
2264 struct coro *next = (struct coro *)slf_frame.data;
2265
2266 SvREFCNT_inc_NN (next->hv);
2267 prepare_schedule_to (aTHX_ ta, next);
2268}
2269
2270static void
2271slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2272{
2273 if (!items)
2274 croak ("Coro::schedule_to expects a coroutine argument, caught");
2275
2276 frame->data = (void *)SvSTATE (arg [0]);
2277 frame->prepare = slf_prepare_schedule_to;
2278 frame->check = slf_check_nop;
2279}
2280
2281static void
2282slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 api_ready (aTHX_ SvRV (coro_current));
2285
2286 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2287}
2288
2289static void
2290slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 frame->prepare = prepare_cede;
2293 frame->check = slf_check_nop;
2294}
2295
2296static void
2297slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 frame->prepare = prepare_cede_notself;
2300 frame->check = slf_check_nop;
2301}
2302
2303/*
2304 * these not obviously related functions are all rolled into one
2305 * function to increase chances that they all will call transfer with the same
2306 * stack offset
2307 * SLF stands for "schedule-like-function".
2308 */
2309static OP *
2310pp_slf (pTHX)
2311{
2312 I32 checkmark; /* mark SP to see how many elements check has pushed */
2313
2314 /* set up the slf frame, unless it has already been set-up */
2315 /* the latter happens when a new coro has been started */
2316 /* or when a new cctx was attached to an existing coroutine */
2317 if (expect_true (!slf_frame.prepare))
2318 {
2319 /* first iteration */
2320 dSP;
2321 SV **arg = PL_stack_base + TOPMARK + 1;
2322 int items = SP - arg; /* args without function object */
2323 SV *gv = *sp;
2324
2325 /* do a quick consistency check on the "function" object, and if it isn't */
2326 /* for us, divert to the real entersub */
2327 if (SvTYPE (gv) != SVt_PVGV
2328 || !GvCV (gv)
2329 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2330 return PL_ppaddr[OP_ENTERSUB](aTHX);
2331
2332 if (!(PL_op->op_flags & OPf_STACKED))
2333 {
2334 /* ampersand-form of call, use @_ instead of stack */
2335 AV *av = GvAV (PL_defgv);
2336 arg = AvARRAY (av);
2337 items = AvFILLp (av) + 1;
2338 }
2339
2340 /* now call the init function, which needs to set up slf_frame */
2341 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2342 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2343
2344 /* pop args */
2345 SP = PL_stack_base + POPMARK;
2346
2347 PUTBACK;
2348 }
2349
2350 /* now that we have a slf_frame, interpret it! */
2351 /* we use a callback system not to make the code needlessly */
2352 /* complicated, but so we can run multiple perl coros from one cctx */
2353
2354 do
2355 {
2356 struct coro_transfer_args ta;
2357
2358 slf_frame.prepare (aTHX_ &ta);
2359 TRANSFER (ta, 0);
2360
2361 checkmark = PL_stack_sp - PL_stack_base;
2362 }
2363 while (slf_frame.check (aTHX_ &slf_frame));
2364
2365 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2366
2367 /* exception handling */
2368 if (expect_false (CORO_THROW))
2369 {
2370 SV *exception = sv_2mortal (CORO_THROW);
2371
2372 CORO_THROW = 0;
2373 sv_setsv (ERRSV, exception);
2374 croak (0);
2375 }
2376
2377 /* return value handling - mostly like entersub */
2378 /* make sure we put something on the stack in scalar context */
2379 if (GIMME_V == G_SCALAR)
2380 {
2381 dSP;
2382 SV **bot = PL_stack_base + checkmark;
2383
2384 if (sp == bot) /* too few, push undef */
2385 bot [1] = &PL_sv_undef;
2386 else if (sp != bot + 1) /* too many, take last one */
2387 bot [1] = *sp;
2388
2389 SP = bot + 1;
2390
2391 PUTBACK;
2392 }
2393
2394 return NORMAL;
2395}
2396
2397static void
2398api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2399{
2400 int i;
2401 SV **arg = PL_stack_base + ax;
2402 int items = PL_stack_sp - arg + 1;
2403
2404 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2405
2406 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2407 && PL_op->op_ppaddr != pp_slf)
2408 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2409
2410 CvFLAGS (cv) |= CVf_SLF;
2411 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2412 slf_cv = cv;
2413
2414 /* we patch the op, and then re-run the whole call */
2415 /* we have to put the same argument on the stack for this to work */
2416 /* and this will be done by pp_restore */
2417 slf_restore.op_next = (OP *)&slf_restore;
2418 slf_restore.op_type = OP_CUSTOM;
2419 slf_restore.op_ppaddr = pp_restore;
2420 slf_restore.op_first = PL_op;
2421
2422 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2423
2424 if (PL_op->op_flags & OPf_STACKED)
2425 {
2426 if (items > slf_arga)
2427 {
2428 slf_arga = items;
2429 free (slf_argv);
2430 slf_argv = malloc (slf_arga * sizeof (SV *));
2431 }
2432
2433 slf_argc = items;
2434
2435 for (i = 0; i < items; ++i)
2436 slf_argv [i] = SvREFCNT_inc (arg [i]);
2437 }
2438 else
2439 slf_argc = 0;
2440
2441 PL_op->op_ppaddr = pp_slf;
2442 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2443
2444 PL_op = (OP *)&slf_restore;
2445}
2446
2447/*****************************************************************************/
2448/* dynamic wind */
2449
2450static void
2451on_enterleave_call (pTHX_ SV *cb)
2452{
2453 dSP;
2454
2455 PUSHSTACK;
2456
2457 PUSHMARK (SP);
2458 PUTBACK;
2459 call_sv (cb, G_VOID | G_DISCARD);
2460 SPAGAIN;
2461
2462 POPSTACK;
2463}
2464
2465static SV *
2466coro_avp_pop_and_free (pTHX_ AV **avp)
2467{
2468 AV *av = *avp;
2469 SV *res = av_pop (av);
2470
2471 if (AvFILLp (av) < 0)
2472 {
2473 *avp = 0;
2474 SvREFCNT_dec (av);
2475 }
2476
2477 return res;
2478}
2479
2480static void
2481coro_pop_on_enter (pTHX_ void *coro)
2482{
2483 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2484 SvREFCNT_dec (cb);
2485}
2486
2487static void
2488coro_pop_on_leave (pTHX_ void *coro)
2489{
2490 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2491 on_enterleave_call (aTHX_ sv_2mortal (cb));
2492}
2493
2494/*****************************************************************************/
2495/* PerlIO::cede */
2496
2497typedef struct
2498{
2499 PerlIOBuf base;
2500 NV next, every;
2501} PerlIOCede;
2502
2503static IV
2504PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2505{
2506 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2507
2508 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2509 self->next = nvtime () + self->every;
2510
2511 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2512}
2513
2514static SV *
2515PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2516{
2517 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2518
2519 return newSVnv (self->every);
2520}
2521
2522static IV
2523PerlIOCede_flush (pTHX_ PerlIO *f)
2524{
2525 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2526 double now = nvtime ();
2527
2528 if (now >= self->next)
2529 {
2530 api_cede (aTHX);
2531 self->next = now + self->every;
2532 }
2533
2534 return PerlIOBuf_flush (aTHX_ f);
2535}
2536
2537static PerlIO_funcs PerlIO_cede =
2538{
2539 sizeof(PerlIO_funcs),
2540 "cede",
2541 sizeof(PerlIOCede),
2542 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2543 PerlIOCede_pushed,
2544 PerlIOBuf_popped,
2545 PerlIOBuf_open,
2546 PerlIOBase_binmode,
2547 PerlIOCede_getarg,
2548 PerlIOBase_fileno,
2549 PerlIOBuf_dup,
2550 PerlIOBuf_read,
2551 PerlIOBuf_unread,
2552 PerlIOBuf_write,
2553 PerlIOBuf_seek,
2554 PerlIOBuf_tell,
2555 PerlIOBuf_close,
2556 PerlIOCede_flush,
2557 PerlIOBuf_fill,
2558 PerlIOBase_eof,
2559 PerlIOBase_error,
2560 PerlIOBase_clearerr,
2561 PerlIOBase_setlinebuf,
2562 PerlIOBuf_get_base,
2563 PerlIOBuf_bufsiz,
2564 PerlIOBuf_get_ptr,
2565 PerlIOBuf_get_cnt,
2566 PerlIOBuf_set_ptrcnt,
2567};
2568
2569/*****************************************************************************/
2570/* Coro::Semaphore & Coro::Signal */
2571
2572static SV *
2573coro_waitarray_new (pTHX_ int count)
2574{
2575 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2576 AV *av = newAV ();
2577 SV **ary;
2578
2579 /* unfortunately, building manually saves memory */
2580 Newx (ary, 2, SV *);
2581 AvALLOC (av) = ary;
2582#if PERL_VERSION_ATLEAST (5,10,0)
2583 AvARRAY (av) = ary;
2584#else
2585 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2586 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2587 SvPVX ((SV *)av) = (char *)ary;
2588#endif
2589 AvMAX (av) = 1;
2590 AvFILLp (av) = 0;
2591 ary [0] = newSViv (count);
2592
2593 return newRV_noinc ((SV *)av);
2594}
2595
2596/* semaphore */
2597
2598static void
2599coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2600{
2601 SV *count_sv = AvARRAY (av)[0];
2602 IV count = SvIVX (count_sv);
2603
2604 count += adjust;
2605 SvIVX (count_sv) = count;
2606
2607 /* now wake up as many waiters as are expected to lock */
2608 while (count > 0 && AvFILLp (av) > 0)
2609 {
2610 SV *cb;
2611
2612 /* swap first two elements so we can shift a waiter */
2613 AvARRAY (av)[0] = AvARRAY (av)[1];
2614 AvARRAY (av)[1] = count_sv;
2615 cb = av_shift (av);
2616
2617 if (SvOBJECT (cb))
2618 {
2619 api_ready (aTHX_ cb);
2620 --count;
2621 }
2622 else if (SvTYPE (cb) == SVt_PVCV)
2623 {
2624 dSP;
2625 PUSHMARK (SP);
2626 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2627 PUTBACK;
2628 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2629 }
2630
2631 SvREFCNT_dec (cb);
2632 }
2633}
2634
2635static void
2636coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2637{
2638 /* call $sem->adjust (0) to possibly wake up some other waiters */
2639 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2640}
2641
842static int 2642static int
843coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2643slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
844{ 2644{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 2645 AV *av = (AV *)frame->data;
2646 SV *count_sv = AvARRAY (av)[0];
846 2647
847 ++coro->refcnt; 2648 /* if we are about to throw, don't actually acquire the lock, just throw */
2649 if (CORO_THROW)
2650 return 0;
2651 else if (SvIVX (count_sv) > 0)
2652 {
2653 SvSTATE_current->on_destroy = 0;
2654
2655 if (acquire)
2656 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2657 else
2658 coro_semaphore_adjust (aTHX_ av, 0);
2659
2660 return 0;
2661 }
2662 else
2663 {
2664 int i;
2665 /* if we were woken up but can't down, we look through the whole */
2666 /* waiters list and only add us if we aren't in there already */
2667 /* this avoids some degenerate memory usage cases */
2668
2669 for (i = 1; i <= AvFILLp (av); ++i)
2670 if (AvARRAY (av)[i] == SvRV (coro_current))
2671 return 1;
2672
2673 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2674 return 1;
2675 }
2676}
2677
2678static int
2679slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2680{
2681 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2682}
2683
2684static int
2685slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2686{
2687 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2688}
2689
2690static void
2691slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2692{
2693 AV *av = (AV *)SvRV (arg [0]);
2694
2695 if (SvIVX (AvARRAY (av)[0]) > 0)
2696 {
2697 frame->data = (void *)av;
2698 frame->prepare = prepare_nop;
2699 }
2700 else
2701 {
2702 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2703
2704 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2705 frame->prepare = prepare_schedule;
2706
2707 /* to avoid race conditions when a woken-up coro gets terminated */
2708 /* we arrange for a temporary on_destroy that calls adjust (0) */
2709 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2710 }
2711}
2712
2713static void
2714slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2715{
2716 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2717 frame->check = slf_check_semaphore_down;
2718}
2719
2720static void
2721slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2722{
2723 if (items >= 2)
2724 {
2725 /* callback form */
2726 AV *av = (AV *)SvRV (arg [0]);
2727 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2728
2729 av_push (av, SvREFCNT_inc_NN (cb_cv));
2730
2731 if (SvIVX (AvARRAY (av)[0]) > 0)
2732 coro_semaphore_adjust (aTHX_ av, 0);
2733
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2740 frame->check = slf_check_semaphore_wait;
2741 }
2742}
2743
2744/* signal */
2745
2746static void
2747coro_signal_wake (pTHX_ AV *av, int count)
2748{
2749 SvIVX (AvARRAY (av)[0]) = 0;
2750
2751 /* now signal count waiters */
2752 while (count > 0 && AvFILLp (av) > 0)
2753 {
2754 SV *cb;
2755
2756 /* swap first two elements so we can shift a waiter */
2757 cb = AvARRAY (av)[0];
2758 AvARRAY (av)[0] = AvARRAY (av)[1];
2759 AvARRAY (av)[1] = cb;
2760
2761 cb = av_shift (av);
2762
2763 if (SvTYPE (cb) == SVt_PVCV)
2764 {
2765 dSP;
2766 PUSHMARK (SP);
2767 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2768 PUTBACK;
2769 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2770 }
2771 else
2772 {
2773 api_ready (aTHX_ cb);
2774 sv_setiv (cb, 0); /* signal waiter */
2775 }
2776
2777 SvREFCNT_dec (cb);
2778
2779 --count;
2780 }
2781}
2782
2783static int
2784slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2785{
2786 /* if we are about to throw, also stop waiting */
2787 return SvROK ((SV *)frame->data) && !CORO_THROW;
2788}
2789
2790static void
2791slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2792{
2793 AV *av = (AV *)SvRV (arg [0]);
2794
2795 if (items >= 2)
2796 {
2797 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2798 av_push (av, SvREFCNT_inc_NN (cb_cv));
2799
2800 if (SvIVX (AvARRAY (av)[0]))
2801 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2802
2803 frame->prepare = prepare_nop;
2804 frame->check = slf_check_nop;
2805 }
2806 else if (SvIVX (AvARRAY (av)[0]))
2807 {
2808 SvIVX (AvARRAY (av)[0]) = 0;
2809 frame->prepare = prepare_nop;
2810 frame->check = slf_check_nop;
2811 }
2812 else
2813 {
2814 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2815
2816 av_push (av, waiter);
2817
2818 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2819 frame->prepare = prepare_schedule;
2820 frame->check = slf_check_signal_wait;
2821 }
2822}
2823
2824/*****************************************************************************/
2825/* Coro::AIO */
2826
2827#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2828
2829/* helper storage struct */
2830struct io_state
2831{
2832 int errorno;
2833 I32 laststype; /* U16 in 5.10.0 */
2834 int laststatval;
2835 Stat_t statcache;
2836};
2837
2838static void
2839coro_aio_callback (pTHX_ CV *cv)
2840{
2841 dXSARGS;
2842 AV *state = (AV *)GENSUB_ARG;
2843 SV *coro = av_pop (state);
2844 SV *data_sv = newSV (sizeof (struct io_state));
2845
2846 av_extend (state, items - 1);
2847
2848 sv_upgrade (data_sv, SVt_PV);
2849 SvCUR_set (data_sv, sizeof (struct io_state));
2850 SvPOK_only (data_sv);
2851
2852 {
2853 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2854
2855 data->errorno = errno;
2856 data->laststype = PL_laststype;
2857 data->laststatval = PL_laststatval;
2858 data->statcache = PL_statcache;
2859 }
2860
2861 /* now build the result vector out of all the parameters and the data_sv */
2862 {
2863 int i;
2864
2865 for (i = 0; i < items; ++i)
2866 av_push (state, SvREFCNT_inc_NN (ST (i)));
2867 }
2868
2869 av_push (state, data_sv);
2870
2871 api_ready (aTHX_ coro);
2872 SvREFCNT_dec (coro);
2873 SvREFCNT_dec ((AV *)state);
2874}
2875
2876static int
2877slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2878{
2879 AV *state = (AV *)frame->data;
2880
2881 /* if we are about to throw, return early */
2882 /* this does not cancel the aio request, but at least */
2883 /* it quickly returns */
2884 if (CORO_THROW)
2885 return 0;
2886
2887 /* one element that is an RV? repeat! */
2888 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2889 return 1;
2890
2891 /* restore status */
2892 {
2893 SV *data_sv = av_pop (state);
2894 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2895
2896 errno = data->errorno;
2897 PL_laststype = data->laststype;
2898 PL_laststatval = data->laststatval;
2899 PL_statcache = data->statcache;
2900
2901 SvREFCNT_dec (data_sv);
2902 }
2903
2904 /* push result values */
2905 {
2906 dSP;
2907 int i;
2908
2909 EXTEND (SP, AvFILLp (state) + 1);
2910 for (i = 0; i <= AvFILLp (state); ++i)
2911 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2912
2913 PUTBACK;
2914 }
848 2915
849 return 0; 2916 return 0;
850} 2917}
851 2918
852static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
853
854static struct coro *
855SvSTATE (SV *coro)
856{
857 MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);
858 assert (mg->mg_type == PERL_MAGIC_ext);
859 return (struct coro *)mg->mg_ptr;
860}
861
862static void 2919static void
863api_transfer (pTHX_ SV *prev, SV *next, int flags) 2920slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
864{ 2921{
865 SV_CORO (prev, "Coro::transfer"); 2922 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
866 SV_CORO (next, "Coro::transfer"); 2923 SV *coro_hv = SvRV (coro_current);
2924 struct coro *coro = SvSTATE_hv (coro_hv);
867 2925
868 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2926 /* put our coroutine id on the state arg */
869} 2927 av_push (state, SvREFCNT_inc_NN (coro_hv));
870 2928
871/** Coro ********************************************************************/ 2929 /* first see whether we have a non-zero priority and set it as AIO prio */
2930 if (coro->prio)
2931 {
2932 dSP;
872 2933
873#define PRIO_MAX 3 2934 static SV *prio_cv;
874#define PRIO_HIGH 1 2935 static SV *prio_sv;
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879 2936
880/* for Coro.pm */ 2937 if (expect_false (!prio_cv))
881static GV *coro_current, *coro_idle; 2938 {
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 2939 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
883static int coro_nready; 2940 prio_sv = newSViv (0);
2941 }
884 2942
885static void 2943 PUSHMARK (SP);
886coro_enq (pTHX_ SV *sv) 2944 sv_setiv (prio_sv, coro->prio);
887{ 2945 XPUSHs (prio_sv);
888 int prio;
889 2946
890 if (SvTYPE (sv) != SVt_PVHV) 2947 PUTBACK;
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2948 call_sv (prio_cv, G_VOID | G_DISCARD);
2949 }
892 2950
2951 /* now call the original request */
893 { 2952 {
894 SV *coro = sv; 2953 dSP;
895 SV_CORO (coro, "omg"); 2954 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
896 prio = SvSTATE (coro)->prio; 2955 int i;
2956
2957 PUSHMARK (SP);
2958
2959 /* first push all args to the stack */
2960 EXTEND (SP, items + 1);
2961
2962 for (i = 0; i < items; ++i)
2963 PUSHs (arg [i]);
2964
2965 /* now push the callback closure */
2966 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2967
2968 /* now call the AIO function - we assume our request is uncancelable */
2969 PUTBACK;
2970 call_sv ((SV *)req, G_VOID | G_DISCARD);
897 } 2971 }
898 2972
899 av_push (coro_ready [prio - PRIO_MIN], sv); 2973 /* now that the requets is going, we loop toll we have a result */
900 coro_nready++; 2974 frame->data = (void *)state;
2975 frame->prepare = prepare_schedule;
2976 frame->check = slf_check_aio_req;
901} 2977}
902 2978
903static SV *
904coro_deq (pTHX_ int min_prio)
905{
906 int prio = PRIO_MAX - PRIO_MIN;
907
908 min_prio -= PRIO_MIN;
909 if (min_prio < 0)
910 min_prio = 0;
911
912 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
913 if (AvFILLp (coro_ready [prio]) >= 0)
914 {
915 coro_nready--;
916 return av_shift (coro_ready [prio]);
917 }
918
919 return 0;
920}
921
922static void 2979static void
923api_ready (SV *coro) 2980coro_aio_req_xs (pTHX_ CV *cv)
924{ 2981{
925 dTHX; 2982 dXSARGS;
926 2983
927 if (SvROK (coro)) 2984 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
928 coro = SvRV (coro);
929 2985
930 LOCK; 2986 XSRETURN_EMPTY;
931 coro_enq (aTHX_ SvREFCNT_inc (coro));
932 UNLOCK;
933} 2987}
934 2988
935static void 2989/*****************************************************************************/
936api_schedule (void)
937{
938 dTHX;
939 2990
940 SV *prev, *next; 2991#if CORO_CLONE
2992# include "clone.c"
2993#endif
941 2994
942 LOCK;
943
944 prev = SvRV (GvSV (coro_current));
945 next = coro_deq (aTHX_ PRIO_MIN);
946
947 if (!next)
948 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
949
950 /* free this only after the transfer */
951 coro_mortal = prev;
952 SV_CORO (prev, "Coro::schedule");
953
954 SvRV (GvSV (coro_current)) = next;
955
956 SV_CORO (next, "Coro::schedule");
957
958 UNLOCK;
959
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962}
963
964static void
965api_cede (void)
966{
967 dTHX;
968
969 LOCK;
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971 UNLOCK;
972
973 api_schedule ();
974}
975
976MODULE = Coro::State PACKAGE = Coro::State 2995MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 2996
978PROTOTYPES: DISABLE 2997PROTOTYPES: DISABLE
979 2998
980BOOT: 2999BOOT:
981{ /* {} necessary for stoopid perl-5.6.x */ 3000{
982#ifdef USE_ITHREADS 3001#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 3002# if CORO_PTHREAD
3003 coro_thx = PERL_GET_CONTEXT;
3004# endif
984#endif 3005#endif
985 BOOT_PAGESIZE; 3006 BOOT_PAGESIZE;
986 3007
987 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3008 cctx_current = cctx_new_empty ();
988 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3009
3010 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3011 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3012
3013 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3014 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3015 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3016
3017 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3018 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3019 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3020
989 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3021 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990 3022
991 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3023 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3024 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3025 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3026 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995 3027
996 main_mainstack = PL_mainstack; 3028 main_mainstack = PL_mainstack;
3029 main_top_env = PL_top_env;
997 3030
3031 while (main_top_env->je_prev)
3032 main_top_env = main_top_env->je_prev;
3033
3034 {
3035 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3036
3037 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3038 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3039
3040 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3041 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3042 }
3043
998 coroapi.ver = CORO_API_VERSION; 3044 coroapi.ver = CORO_API_VERSION;
3045 coroapi.rev = CORO_API_REVISION;
3046
999 coroapi.transfer = api_transfer; 3047 coroapi.transfer = api_transfer;
1000 3048
3049 coroapi.sv_state = SvSTATE_;
3050 coroapi.execute_slf = api_execute_slf;
3051 coroapi.prepare_nop = prepare_nop;
3052 coroapi.prepare_schedule = prepare_schedule;
3053 coroapi.prepare_cede = prepare_cede;
3054 coroapi.prepare_cede_notself = prepare_cede_notself;
3055
3056 {
3057 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3058
3059 if (!svp) croak ("Time::HiRes is required");
3060 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3061
3062 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3063
3064 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3065 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3066 }
3067
1001 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3068 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1002} 3069}
1003 3070
1004SV * 3071SV *
1005new (char *klass, ...) 3072new (char *klass, ...)
3073 ALIAS:
3074 Coro::new = 1
1006 CODE: 3075 CODE:
1007{ 3076{
1008 struct coro *coro; 3077 struct coro *coro;
3078 MAGIC *mg;
1009 HV *hv; 3079 HV *hv;
3080 CV *cb;
1010 int i; 3081 int i;
1011 3082
3083 if (items > 1)
3084 {
3085 cb = coro_sv_2cv (aTHX_ ST (1));
3086
3087 if (!ix)
3088 {
3089 if (CvISXSUB (cb))
3090 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3091
3092 if (!CvROOT (cb))
3093 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3094 }
3095 }
3096
1012 Newz (0, coro, 1, struct coro); 3097 Newz (0, coro, 1, struct coro);
1013 coro->args = newAV (); 3098 coro->args = newAV ();
3099 coro->flags = CF_NEW;
1014 3100
1015 for (i = 1; i < items; i++) 3101 if (coro_first) coro_first->prev = coro;
1016 av_push (coro->args, newSVsv (ST (i))); 3102 coro->next = coro_first;
3103 coro_first = coro;
1017 3104
1018 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1019 /*coro->stack = 0;*/
1020
1021 hv = newHV (); 3105 coro->hv = hv = newHV ();
1022 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3106 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3107 mg->mg_flags |= MGf_DUP;
1023 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3108 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
3109
3110 if (items > 1)
3111 {
3112 av_extend (coro->args, items - 1 + ix - 1);
3113
3114 if (ix)
3115 {
3116 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3117 cb = cv_coro_run;
3118 }
3119
3120 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3121
3122 for (i = 2; i < items; i++)
3123 av_push (coro->args, newSVsv (ST (i)));
3124 }
1024} 3125}
1025 OUTPUT: 3126 OUTPUT:
1026 RETVAL 3127 RETVAL
1027 3128
1028void 3129void
1029transfer(prev, next, flags) 3130transfer (...)
1030 SV *prev 3131 PROTOTYPE: $$
1031 SV *next 3132 CODE:
1032 int flags 3133 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3134
3135bool
3136_destroy (SV *coro_sv)
3137 CODE:
3138 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3139 OUTPUT:
3140 RETVAL
3141
3142void
3143_exit (int code)
3144 PROTOTYPE: $
3145 CODE:
3146 _exit (code);
3147
3148SV *
3149clone (Coro::State coro)
3150 CODE:
3151{
3152#if CORO_CLONE
3153 struct coro *ncoro = coro_clone (aTHX_ coro);
3154 MAGIC *mg;
3155 /* TODO: too much duplication */
3156 ncoro->hv = newHV ();
3157 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3158 mg->mg_flags |= MGf_DUP;
3159 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3160#else
3161 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3162#endif
3163}
3164 OUTPUT:
3165 RETVAL
3166
3167int
3168cctx_stacksize (int new_stacksize = 0)
3169 PROTOTYPE: ;$
3170 CODE:
3171 RETVAL = cctx_stacksize;
3172 if (new_stacksize)
3173 {
3174 cctx_stacksize = new_stacksize;
3175 ++cctx_gen;
3176 }
3177 OUTPUT:
3178 RETVAL
3179
3180int
3181cctx_max_idle (int max_idle = 0)
3182 PROTOTYPE: ;$
3183 CODE:
3184 RETVAL = cctx_max_idle;
3185 if (max_idle > 1)
3186 cctx_max_idle = max_idle;
3187 OUTPUT:
3188 RETVAL
3189
3190int
3191cctx_count ()
3192 PROTOTYPE:
3193 CODE:
3194 RETVAL = cctx_count;
3195 OUTPUT:
3196 RETVAL
3197
3198int
3199cctx_idle ()
3200 PROTOTYPE:
3201 CODE:
3202 RETVAL = cctx_idle;
3203 OUTPUT:
3204 RETVAL
3205
3206void
3207list ()
3208 PROTOTYPE:
3209 PPCODE:
3210{
3211 struct coro *coro;
3212 for (coro = coro_first; coro; coro = coro->next)
3213 if (coro->hv)
3214 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3215}
3216
3217void
3218call (Coro::State coro, SV *coderef)
3219 ALIAS:
3220 eval = 1
3221 CODE:
3222{
3223 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3224 {
3225 struct coro *current = SvSTATE_current;
3226
3227 if (current != coro)
3228 {
3229 PUTBACK;
3230 save_perl (aTHX_ current);
3231 load_perl (aTHX_ coro);
3232 SPAGAIN;
3233 }
3234
3235 PUSHSTACK;
3236
3237 PUSHMARK (SP);
3238 PUTBACK;
3239
3240 if (ix)
3241 eval_sv (coderef, 0);
3242 else
3243 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3244
3245 POPSTACK;
3246 SPAGAIN;
3247
3248 if (current != coro)
3249 {
3250 PUTBACK;
3251 save_perl (aTHX_ coro);
3252 load_perl (aTHX_ current);
3253 SPAGAIN;
3254 }
3255 }
3256}
3257
3258SV *
3259is_ready (Coro::State coro)
3260 PROTOTYPE: $
3261 ALIAS:
3262 is_ready = CF_READY
3263 is_running = CF_RUNNING
3264 is_new = CF_NEW
3265 is_destroyed = CF_DESTROYED
3266 is_suspended = CF_SUSPENDED
3267 CODE:
3268 RETVAL = boolSV (coro->flags & ix);
3269 OUTPUT:
3270 RETVAL
3271
3272void
3273throw (Coro::State self, SV *throw = &PL_sv_undef)
3274 PROTOTYPE: $;$
1033 CODE: 3275 CODE:
1034 PUTBACK; 3276{
1035 SV_CORO (next, "Coro::transfer"); 3277 struct coro *current = SvSTATE_current;
1036 SV_CORO (prev, "Coro::transfer"); 3278 SV **throwp = self == current ? &CORO_THROW : &self->except;
1037 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3279 SvREFCNT_dec (*throwp);
1038 SPAGAIN; 3280 SvGETMAGIC (throw);
3281 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3282}
3283
3284void
3285api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3286 PROTOTYPE: $;$
3287 C_ARGS: aTHX_ coro, flags
3288
3289SV *
3290has_cctx (Coro::State coro)
3291 PROTOTYPE: $
3292 CODE:
3293 /* maybe manage the running flag differently */
3294 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3295 OUTPUT:
3296 RETVAL
3297
3298int
3299is_traced (Coro::State coro)
3300 PROTOTYPE: $
3301 CODE:
3302 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3303 OUTPUT:
3304 RETVAL
3305
3306UV
3307rss (Coro::State coro)
3308 PROTOTYPE: $
3309 ALIAS:
3310 usecount = 1
3311 CODE:
3312 switch (ix)
3313 {
3314 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3315 case 1: RETVAL = coro->usecount; break;
3316 }
3317 OUTPUT:
3318 RETVAL
3319
3320void
3321force_cctx ()
3322 PROTOTYPE:
3323 CODE:
3324 cctx_current->idle_sp = 0;
3325
3326void
3327swap_defsv (Coro::State self)
3328 PROTOTYPE: $
3329 ALIAS:
3330 swap_defav = 1
3331 CODE:
3332 if (!self->slot)
3333 croak ("cannot swap state with coroutine that has no saved state,");
3334 else
3335 {
3336 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3337 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3338
3339 SV *tmp = *src; *src = *dst; *dst = tmp;
3340 }
3341
3342void
3343cancel (Coro::State self)
3344 CODE:
3345 coro_state_destroy (aTHX_ self);
3346 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3347
3348
3349SV *
3350enable_times (int enabled = enable_times)
3351 CODE:
3352{
3353 RETVAL = boolSV (enable_times);
3354
3355 if (enabled != enable_times)
3356 {
3357 enable_times = enabled;
3358
3359 coro_times_update ();
3360 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3361 }
3362}
3363 OUTPUT:
3364 RETVAL
3365
3366void
3367times (Coro::State self)
3368 PPCODE:
3369{
3370 struct coro *current = SvSTATE (coro_current);
3371
3372 if (expect_false (current == self))
3373 {
3374 coro_times_update ();
3375 coro_times_add (SvSTATE (coro_current));
3376 }
3377
3378 EXTEND (SP, 2);
3379 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3380 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3381
3382 if (expect_false (current == self))
3383 coro_times_sub (SvSTATE (coro_current));
3384}
3385
3386MODULE = Coro::State PACKAGE = Coro
3387
3388BOOT:
3389{
3390 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3391 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3392 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3393 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3394 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3395 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3396 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3397 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3398 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3399
3400 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3401 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3402 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3403 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3404
3405 coro_stash = gv_stashpv ("Coro", TRUE);
3406
3407 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3408 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3409 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3410 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3411 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3412 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3413
3414 {
3415 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3416
3417 coroapi.schedule = api_schedule;
3418 coroapi.schedule_to = api_schedule_to;
3419 coroapi.cede = api_cede;
3420 coroapi.cede_notself = api_cede_notself;
3421 coroapi.ready = api_ready;
3422 coroapi.is_ready = api_is_ready;
3423 coroapi.nready = coro_nready;
3424 coroapi.current = coro_current;
3425
3426 /*GCoroAPI = &coroapi;*/
3427 sv_setiv (sv, (IV)&coroapi);
3428 SvREADONLY_on (sv);
3429 }
3430}
3431
3432void
3433terminate (...)
3434 CODE:
3435 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3436
3437void
3438schedule (...)
3439 CODE:
3440 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3441
3442void
3443schedule_to (...)
3444 CODE:
3445 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3446
3447void
3448cede_to (...)
3449 CODE:
3450 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3451
3452void
3453cede (...)
3454 CODE:
3455 CORO_EXECUTE_SLF_XS (slf_init_cede);
3456
3457void
3458cede_notself (...)
3459 CODE:
3460 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3461
3462void
3463_set_current (SV *current)
3464 PROTOTYPE: $
3465 CODE:
3466 SvREFCNT_dec (SvRV (coro_current));
3467 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3468
3469void
3470_set_readyhook (SV *hook)
3471 PROTOTYPE: $
3472 CODE:
3473 SvREFCNT_dec (coro_readyhook);
3474 SvGETMAGIC (hook);
3475 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1039 3476
1040int 3477int
1041prio (Coro::State coro, int newprio = 0) 3478prio (Coro::State coro, int newprio = 0)
3479 PROTOTYPE: $;$
1042 ALIAS: 3480 ALIAS:
1043 nice = 1 3481 nice = 1
1044 CODE: 3482 CODE:
1045{ 3483{
1046 RETVAL = coro->prio; 3484 RETVAL = coro->prio;
1047 3485
1048 if (items > 1) 3486 if (items > 1)
1049 { 3487 {
1050 if (ix) 3488 if (ix)
1051 newprio += coro->prio; 3489 newprio = coro->prio - newprio;
1052 3490
1053 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3491 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1054 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3492 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1055 3493
1056 coro->prio = newprio; 3494 coro->prio = newprio;
1057 } 3495 }
1058} 3496}
3497 OUTPUT:
3498 RETVAL
1059 3499
1060void 3500SV *
1061_clone_state_from (SV *dst, SV *src) 3501ready (SV *self)
1062 CODE:
1063{
1064 struct coro *coro_src = SvSTATE (src);
1065
1066 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068 ++coro_src->refcnt;
1069 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070}
1071
1072void
1073_exit (code)
1074 int code
1075 PROTOTYPE: $ 3502 PROTOTYPE: $
1076 CODE: 3503 CODE:
1077 _exit (code); 3504 RETVAL = boolSV (api_ready (aTHX_ self));
1078 3505 OUTPUT:
1079MODULE = Coro::State PACKAGE = Coro::Cont 3506 RETVAL
1080
1081void
1082yield (...)
1083 PROTOTYPE: @
1084 CODE:
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 struct coro *prev, *next;
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105 SvREFCNT_dec (sv);
1106
1107 coro_state_transfer (aTHX_ prev, next, 0);
1108
1109MODULE = Coro::State PACKAGE = Coro
1110
1111BOOT:
1112{
1113 int i;
1114 HV *stash = gv_stashpv ("Coro", TRUE);
1115
1116 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125
1126 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127 coro_ready[i] = newAV ();
1128
1129 {
1130 SV *sv = perl_get_sv("Coro::API", 1);
1131
1132 coroapi.schedule = api_schedule;
1133 coroapi.cede = api_cede;
1134 coroapi.ready = api_ready;
1135 coroapi.nready = &coro_nready;
1136 coroapi.current = coro_current;
1137
1138 GCoroAPI = &coroapi;
1139 sv_setiv (sv, (IV)&coroapi);
1140 SvREADONLY_on (sv);
1141 }
1142}
1143
1144#if !PERL_MICRO
1145
1146void
1147ready (self)
1148 SV * self
1149 PROTOTYPE: $
1150 CODE:
1151 api_ready (self);
1152
1153#endif
1154 3507
1155int 3508int
1156nready (...) 3509nready (...)
1157 PROTOTYPE: 3510 PROTOTYPE:
1158 CODE: 3511 CODE:
1159 RETVAL = coro_nready; 3512 RETVAL = coro_nready;
1160 OUTPUT: 3513 OUTPUT:
1161 RETVAL 3514 RETVAL
1162 3515
1163void 3516void
1164schedule (...) 3517suspend (Coro::State self)
1165 PROTOTYPE: 3518 PROTOTYPE: $
1166 CODE: 3519 CODE:
1167 api_schedule (); 3520 self->flags |= CF_SUSPENDED;
1168 3521
1169void 3522void
1170cede (...) 3523resume (Coro::State self)
1171 PROTOTYPE: 3524 PROTOTYPE: $
1172 CODE: 3525 CODE:
1173 api_cede (); 3526 self->flags &= ~CF_SUSPENDED;
1174 3527
1175# and these are hacks 3528void
3529_pool_handler (...)
3530 CODE:
3531 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3532
3533void
3534async_pool (SV *cv, ...)
3535 PROTOTYPE: &@
3536 PPCODE:
3537{
3538 HV *hv = (HV *)av_pop (av_async_pool);
3539 AV *av = newAV ();
3540 SV *cb = ST (0);
3541 int i;
3542
3543 av_extend (av, items - 2);
3544 for (i = 1; i < items; ++i)
3545 av_push (av, SvREFCNT_inc_NN (ST (i)));
3546
3547 if ((SV *)hv == &PL_sv_undef)
3548 {
3549 PUSHMARK (SP);
3550 EXTEND (SP, 2);
3551 PUSHs (sv_Coro);
3552 PUSHs ((SV *)cv_pool_handler);
3553 PUTBACK;
3554 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3555 SPAGAIN;
3556
3557 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3558 }
3559
3560 {
3561 struct coro *coro = SvSTATE_hv (hv);
3562
3563 assert (!coro->invoke_cb);
3564 assert (!coro->invoke_av);
3565 coro->invoke_cb = SvREFCNT_inc (cb);
3566 coro->invoke_av = av;
3567 }
3568
3569 api_ready (aTHX_ (SV *)hv);
3570
3571 if (GIMME_V != G_VOID)
3572 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3573 else
3574 SvREFCNT_dec (hv);
3575}
3576
1176SV * 3577SV *
1177_aio_get_state () 3578rouse_cb ()
3579 PROTOTYPE:
1178 CODE: 3580 CODE:
1179{ 3581 RETVAL = coro_new_rouse_cb (aTHX);
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT: 3582 OUTPUT:
1195 RETVAL 3583 RETVAL
1196 3584
1197void 3585void
1198_aio_set_state (char *data_) 3586rouse_wait (...)
3587 PROTOTYPE: ;$
3588 PPCODE:
3589 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3590
3591void
3592on_enter (SV *block)
3593 ALIAS:
3594 on_leave = 1
1199 PROTOTYPE: $ 3595 PROTOTYPE: &
1200 CODE: 3596 CODE:
1201{ 3597{
1202 struct { 3598 struct coro *coro = SvSTATE_current;
3599 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3600
3601 block = (SV *)coro_sv_2cv (aTHX_ block);
3602
3603 if (!*avp)
3604 *avp = newAV ();
3605
3606 av_push (*avp, SvREFCNT_inc (block));
3607
3608 if (!ix)
3609 on_enterleave_call (aTHX_ block);
3610
3611 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3612 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3613 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3614}
3615
3616
3617MODULE = Coro::State PACKAGE = PerlIO::cede
3618
3619BOOT:
3620 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3621
3622
3623MODULE = Coro::State PACKAGE = Coro::Semaphore
3624
3625SV *
3626new (SV *klass, SV *count = 0)
3627 CODE:
3628{
3629 int semcnt = 1;
3630
3631 if (count)
3632 {
3633 SvGETMAGIC (count);
3634
3635 if (SvOK (count))
3636 semcnt = SvIV (count);
3637 }
3638
3639 RETVAL = sv_bless (
3640 coro_waitarray_new (aTHX_ semcnt),
3641 GvSTASH (CvGV (cv))
3642 );
3643}
3644 OUTPUT:
3645 RETVAL
3646
3647# helper for Coro::Channel and others
3648SV *
3649_alloc (int count)
3650 CODE:
3651 RETVAL = coro_waitarray_new (aTHX_ count);
3652 OUTPUT:
3653 RETVAL
3654
3655SV *
3656count (SV *self)
3657 CODE:
3658 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3659 OUTPUT:
3660 RETVAL
3661
3662void
3663up (SV *self, int adjust = 1)
3664 ALIAS:
3665 adjust = 1
3666 CODE:
3667 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3668
3669void
3670down (...)
3671 CODE:
3672 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3673
3674void
3675wait (...)
3676 CODE:
3677 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3678
3679void
3680try (SV *self)
3681 PPCODE:
3682{
3683 AV *av = (AV *)SvRV (self);
3684 SV *count_sv = AvARRAY (av)[0];
3685 IV count = SvIVX (count_sv);
3686
3687 if (count > 0)
3688 {
3689 --count;
3690 SvIVX (count_sv) = count;
3691 XSRETURN_YES;
3692 }
3693 else
3694 XSRETURN_NO;
3695}
3696
3697void
3698waiters (SV *self)
3699 PPCODE:
3700{
3701 AV *av = (AV *)SvRV (self);
3702 int wcount = AvFILLp (av) + 1 - 1;
3703
3704 if (GIMME_V == G_SCALAR)
3705 XPUSHs (sv_2mortal (newSViv (wcount)));
3706 else
3707 {
1203 int errorno; 3708 int i;
1204 int laststype; 3709 EXTEND (SP, wcount);
1205 int laststatval; 3710 for (i = 1; i <= wcount; ++i)
1206 Stat_t statcache; 3711 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1207 } *data = (void *)data_; 3712 }
1208
1209 errno = data->errorno;
1210 PL_laststype = data->laststype;
1211 PL_laststatval = data->laststatval;
1212 PL_statcache = data->statcache;
1213} 3713}
3714
3715MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3716
3717void
3718_may_delete (SV *sem, int count, int extra_refs)
3719 PPCODE:
3720{
3721 AV *av = (AV *)SvRV (sem);
3722
3723 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3724 && AvFILLp (av) == 0 /* no waiters, just count */
3725 && SvIV (AvARRAY (av)[0]) == count)
3726 XSRETURN_YES;
3727
3728 XSRETURN_NO;
3729}
3730
3731MODULE = Coro::State PACKAGE = Coro::Signal
3732
3733SV *
3734new (SV *klass)
3735 CODE:
3736 RETVAL = sv_bless (
3737 coro_waitarray_new (aTHX_ 0),
3738 GvSTASH (CvGV (cv))
3739 );
3740 OUTPUT:
3741 RETVAL
3742
3743void
3744wait (...)
3745 CODE:
3746 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3747
3748void
3749broadcast (SV *self)
3750 CODE:
3751{
3752 AV *av = (AV *)SvRV (self);
3753 coro_signal_wake (aTHX_ av, AvFILLp (av));
3754}
3755
3756void
3757send (SV *self)
3758 CODE:
3759{
3760 AV *av = (AV *)SvRV (self);
3761
3762 if (AvFILLp (av))
3763 coro_signal_wake (aTHX_ av, 1);
3764 else
3765 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3766}
3767
3768IV
3769awaited (SV *self)
3770 CODE:
3771 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3772 OUTPUT:
3773 RETVAL
3774
3775
3776MODULE = Coro::State PACKAGE = Coro::AnyEvent
3777
3778BOOT:
3779 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3780
3781void
3782_schedule (...)
3783 CODE:
3784{
3785 static int incede;
3786
3787 api_cede_notself (aTHX);
3788
3789 ++incede;
3790 while (coro_nready >= incede && api_cede (aTHX))
3791 ;
3792
3793 sv_setsv (sv_activity, &PL_sv_undef);
3794 if (coro_nready >= incede)
3795 {
3796 PUSHMARK (SP);
3797 PUTBACK;
3798 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3799 }
3800
3801 --incede;
3802}
3803
3804
3805MODULE = Coro::State PACKAGE = Coro::AIO
3806
3807void
3808_register (char *target, char *proto, SV *req)
3809 CODE:
3810{
3811 CV *req_cv = coro_sv_2cv (aTHX_ req);
3812 /* newXSproto doesn't return the CV on 5.8 */
3813 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3814 sv_setpv ((SV *)slf_cv, proto);
3815 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3816}
3817

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