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Comparing Coro/Coro/State.xs (file contents):
Revision 1.39 by root, Sun Nov 25 20:04:05 2001 UTC vs.
Revision 1.364 by root, Thu Jul 16 02:19:17 2009 UTC

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

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