ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC vs.
Revision 1.368 by root, Thu Aug 13 02:35:41 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
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65 226
66 /* the stacks and related info (callchain etc..) */ 227 /* state data */
67 PERL_SI *curstackinfo; 228 struct CoroSLF slf_frame; /* saved slf frame */
68 AV *curstack;
69 AV *mainstack; 229 AV *mainstack;
70 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 231
232 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
95 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;
96}; 261};
97 262
98typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
100 265
101static AV *main_mainstack; /* used to differentiate between $main and others */ 266/* the following variables are effectively part of the perl context */
102static 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);
103static SV *ucoro_state_sv; 291static SV *coro_select_select;
104static U32 ucoro_state_hash;
105static HV *padlist_cache;
106static SV *coro_mortal; /* will be freed after next transfer */
107 292
108/* mostly copied from op.c:cv_clone2 */ 293/* horrible hack, but if it works... */
109STATIC AV * 294static OP *
110clone_padlist (AV *protopadlist) 295coro_pp_sselect (aTHX)
111{ 296{
112 AV *av; 297 dSP;
113 I32 ix; 298 PUSHMARK (SP - 4); /* fake argument list */
114 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 299 XPUSHs (coro_select_select);
115 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 300 PUTBACK;
116 SV **pname = AvARRAY (protopad_name); 301
117 SV **ppad = AvARRAY (protopad); 302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
118 I32 fname = AvFILLp (protopad_name); 303 PL_op->op_flags |= OPf_STACKED;
119 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);
120 AV *newpadlist, *newpad_name, *newpad; 443 AV *newpadlist, *newpad;
121 SV **npad;
122
123 newpad_name = newAV ();
124 for (ix = fname; ix >= 0; ix--)
125 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127 newpad = newAV ();
128 av_fill (newpad, AvFILLp (protopad));
129 npad = AvARRAY (newpad);
130 444
131 newpadlist = newAV (); 445 newpadlist = newAV ();
132 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
133 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]));
134 av_store (newpadlist, 1, (SV *) newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
135 457
136 av = newAV (); /* will be @_ */ 458 return newpadlist;
137 av_extend (av, 0); 459}
138 av_store (newpad, 0, (SV *) av);
139 AvFLAGS (av) = AVf_REIFY;
140 460
141 for (ix = fpad; ix > 0; ix--) 461static void
462free_padlist (pTHX_ AV *padlist)
463{
464 /* may be during global destruction */
465 if (!IN_DESTRUCT)
142 { 466 {
143 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 467 I32 i = AvFILLp (padlist);
144 if (namesv && namesv != &PL_sv_undef) 468
469 while (i > 0) /* special-case index 0 */
145 { 470 {
146 char *name = SvPVX (namesv); /* XXX */ 471 /* we try to be extra-careful here */
147 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 472 AV *av = (AV *)AvARRAY (padlist)[i--];
148 { /* lexical from outside? */ 473 I32 j = AvFILLp (av);
149 npad[ix] = SvREFCNT_inc (ppad[ix]); 474
150 } 475 while (j >= 0)
151 else 476 SvREFCNT_dec (AvARRAY (av)[j--]);
152 { /* our own lexical */ 477
153 SV *sv; 478 AvFILLp (av) = -1;
154 if (*name == '&') 479 SvREFCNT_dec (av);
155 sv = SvREFCNT_inc (ppad[ix]);
156 else if (*name == '@')
157 sv = (SV *) newAV ();
158 else if (*name == '%')
159 sv = (SV *) newHV ();
160 else
161 sv = NEWSV (0, 0);
162 if (!SvPADBUSY (sv))
163 SvPADMY_on (sv);
164 npad[ix] = sv;
165 }
166 } 480 }
167 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 481
168 { 482 SvREFCNT_dec (AvARRAY (padlist)[0]);
169 npad[ix] = SvREFCNT_inc (ppad[ix]); 483
170 } 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)--];
171 else 522 else
172 { 523 {
173 SV *sv = NEWSV (0, 0); 524#if CORO_PREFER_PERL_FUNCTIONS
174 SvPADTMP_on (sv); 525 /* this is probably cleaner? but also slower! */
175 npad[ix] = sv; 526 /* in practise, it seems to be less stable */
176 } 527 CV *cp = Perl_cv_clone (aTHX_ cv);
177 } 528 CvPADLIST (cv) = CvPADLIST (cp);
178 529 CvPADLIST (cp) = 0;
179#if 0 /* return -ENOTUNDERSTOOD */ 530 SvREFCNT_dec (cp);
180 /* Now that vars are all in place, clone nested closures. */ 531#else
181 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
182 for (ix = fpad; ix > 0; ix--) {
183 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
184 if (namesv
185 && namesv != &PL_sv_undef
186 && !(SvFLAGS(namesv) & SVf_FAKE)
187 && *SvPVX(namesv) == '&'
188 && CvCLONE(ppad[ix]))
189 {
190 CV *kid = cv_clone((CV*)ppad[ix]);
191 SvREFCNT_dec(ppad[ix]);
192 CvCLONE_on(kid);
193 SvPADMY_on(kid);
194 npad[ix] = (SV*)kid;
195 }
196 }
197#endif 533#endif
198
199 return newpadlist;
200}
201
202#ifdef MAY_FLUSH
203STATIC void
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT(padlist))
208 {
209 I32 i = AvFILLp(padlist);
210 while (i >= 0)
211 {
212 SV **svp = av_fetch(padlist, i--, FALSE);
213 SV *sv = svp ? *svp : Nullsv;
214 if (sv)
215 SvREFCNT_dec(sv);
216 }
217
218 SvREFCNT_dec((SV*)padlist);
219 }
220}
221#endif
222
223/* the next two functions merely cache the padlists */
224STATIC void
225get_padlist (CV *cv)
226{
227 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
228
229 if (he && AvFILLp ((AV *)*he) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
231 else
232 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233}
234
235STATIC void
236put_padlist (CV *cv)
237{
238 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
239
240 if (SvTYPE (*he) != SVt_PVAV)
241 {
242 SvREFCNT_dec (*he);
243 *he = (SV *)newAV ();
244 } 534 }
245
246 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
247} 535}
248 536
249#ifdef MAY_FLUSH
250STATIC void
251flush_padlist_cache ()
252{
253 HV *hv = padlist_cache;
254 padlist_cache = newHV ();
255
256 if (hv_iterinit (hv))
257 {
258 HE *he;
259 AV *padlist;
260
261 while (!!(he = hv_iternext (hv)))
262 {
263 AV *av = (AV *)HeVAL(he);
264
265 /* casting is fun. */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267 free_padlist (padlist);
268 }
269 }
270
271 SvREFCNT_dec (hv);
272}
273#endif
274
275#define SB do {
276#define SE } while (0)
277
278#define LOAD(state) load_state(aTHX_ (state));
279#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
282
283static 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
284load_state(pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
285{ 561{
286 PL_dowarn = c->dowarn; 562 perl_slots *slot = c->slot;
287 PL_in_eval = c->in_eval; 563 c->slot = 0;
288 564
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_top_env = c->top_env;
315 566
316 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 567 GvSV (PL_defgv) = slot->defsv;
317 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 568 GvAV (PL_defgv) = slot->defav;
318 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
319 576
320 { 577 {
321 dSP; 578 dSP;
579
322 CV *cv; 580 CV *cv;
323 581
324 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
326 { 584 {
327 AV *padlist = (AV *)POPs;
328
329 if (padlist)
330 {
331 put_padlist (cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
332 CvPADLIST(cv) = padlist; 586 CvDEPTH (cv) = PTR2IV (POPs);
333#ifdef USE_THREADS 587 CvPADLIST (cv) = (AV *)POPs;
334 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
335#endif
336 }
337
338 ++CvDEPTH(cv);
339 } 588 }
340 589
341 PUTBACK; 590 PUTBACK;
342 } 591 }
343}
344 592
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
345static void 613static void
346save_state(pTHX_ Coro__State c, int flags) 614save_perl (pTHX_ Coro__State c)
347{ 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
348 { 635 {
349 dSP; 636 dSP;
350 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
351 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
352 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
354 /* 641 /*
355 * 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
356 * (and reinitialize) all cv's in the whole callchain :( 643 * (and reinitialize) all cv's in the whole callchain :(
357 */ 644 */
358 645
359 PUSHs (Nullsv); 646 XPUSHs (Nullsv);
360 /* this loop was inspired by pp_caller */ 647 /* this loop was inspired by pp_caller */
361 for (;;) 648 for (;;)
362 { 649 {
363 while (cxix >= 0) 650 while (expect_true (cxix >= 0))
364 { 651 {
365 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
366 653
367 if (CxTYPE(cx) == CXt_SUB) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
368 { 655 {
369 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
657
370 if (CvDEPTH(cv)) 658 if (expect_true (CvDEPTH (cv)))
371 { 659 {
372#ifdef USE_THREADS
373 /*XPUSHs ((SV *)CvOWNER(cv));*/
374 /*CvOWNER(cv) = 0;*/
375 /*error must unlock this cv etc.. etc...*/
376#endif
377 EXTEND (SP, CvDEPTH(cv)*2); 660 EXTEND (SP, 3);
378
379 while (--CvDEPTH(cv))
380 {
381 /* this tells the restore code to increment CvDEPTH */
382 PUSHs (Nullsv);
383 PUSHs ((SV *)cv);
384 }
385
386 PUSHs ((SV *)CvPADLIST(cv)); 661 PUSHs ((SV *)CvPADLIST (cv));
662 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
387 PUSHs ((SV *)cv); 663 PUSHs ((SV *)cv);
388 664
389 get_padlist (cv); /* this is a monster */ 665 CvDEPTH (cv) = 0;
666 get_padlist (aTHX_ cv);
390 } 667 }
391 } 668 }
392 else if (CxTYPE(cx) == CXt_FORMAT)
393 {
394 /* I never used formats, so how should I know how these are implemented? */
395 /* my bold guess is as a simple, plain sub... */
396 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397 }
398 } 669 }
399 670
400 if (top_si->si_type == PERLSI_MAIN) 671 if (expect_true (top_si->si_type == PERLSI_MAIN))
401 break; 672 break;
402 673
403 top_si = top_si->si_prev; 674 top_si = top_si->si_prev;
404 ccstk = top_si->si_cxstack; 675 ccstk = top_si->si_cxstack;
405 cxix = top_si->si_cxix; 676 cxix = top_si->si_cxix;
406 } 677 }
407 678
408 PUTBACK; 679 PUTBACK;
409 } 680 }
410 681
411 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 682 /* allocate some space on the context stack for our purposes */
412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 683 /* we manually unroll here, as usually 2 slots is enough */
413 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 */
414 693
415 c->dowarn = PL_dowarn;
416 c->in_eval = PL_in_eval;
417
418 c->curstackinfo = PL_curstackinfo;
419 c->curstack = PL_curstack;
420 c->mainstack = PL_mainstack; 694 c->mainstack = PL_mainstack;
421 c->stack_sp = PL_stack_sp; 695
422 c->op = PL_op; 696 {
423 c->curpad = PL_curpad; 697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
424 c->stack_base = PL_stack_base; 698
425 c->stack_max = PL_stack_max; 699 slot->defav = GvAV (PL_defgv);
426 c->tmps_stack = PL_tmps_stack; 700 slot->defsv = DEFSV;
427 c->tmps_floor = PL_tmps_floor; 701 slot->errsv = ERRSV;
428 c->tmps_ix = PL_tmps_ix; 702 slot->irsgv = GvSV (irsgv);
429 c->tmps_max = PL_tmps_max; 703 slot->hinthv = GvHV (PL_hintgv);
430 c->markstack = PL_markstack; 704
431 c->markstack_ptr = PL_markstack_ptr; 705 #define VAR(name,type) slot->name = PL_ ## name;
432 c->markstack_max = PL_markstack_max; 706 # include "state.h"
433 c->scopestack = PL_scopestack; 707 #undef VAR
434 c->scopestack_ix = PL_scopestack_ix; 708 }
435 c->scopestack_max = PL_scopestack_max;
436 c->savestack = PL_savestack;
437 c->savestack_ix = PL_savestack_ix;
438 c->savestack_max = PL_savestack_max;
439 c->retstack = PL_retstack;
440 c->retstack_ix = PL_retstack_ix;
441 c->retstack_max = PL_retstack_max;
442 c->curcop = PL_curcop;
443 c->top_env = PL_top_env;
444} 709}
445 710
446/* 711/*
447 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
449 * on the assumption that coroutines do not usually need 714 * on the (sometimes correct) assumption that coroutines do
450 * a lot of stackspace. 715 * not usually need a lot of stackspace.
451 */ 716 */
452STATIC void 717#if CORO_PREFER_PERL_FUNCTIONS
718# define coro_init_stacks(thx) init_stacks ()
719#else
720static void
453coro_init_stacks (pTHX) 721coro_init_stacks (pTHX)
454{ 722{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 723 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 724 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 725 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 726 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 727
460 PL_stack_base = AvARRAY(PL_curstack); 728 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 729 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 730 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 731
464 New(50,PL_tmps_stack,96,SV*); 732 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 733 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 734 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 735 PL_tmps_max = 32;
468 736
469 New(54,PL_markstack,16,I32); 737 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 738 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 739 PL_markstack_max = PL_markstack + 16;
472 740
741#ifdef SET_MARK_OFFSET
473 SET_MARK_OFFSET; 742 SET_MARK_OFFSET;
743#endif
474 744
475 New(54,PL_scopestack,16,I32); 745 New(54,PL_scopestack,8,I32);
476 PL_scopestack_ix = 0; 746 PL_scopestack_ix = 0;
477 PL_scopestack_max = 16; 747 PL_scopestack_max = 8;
478 748
479 New(54,PL_savestack,96,ANY); 749 New(54,PL_savestack,24,ANY);
480 PL_savestack_ix = 0; 750 PL_savestack_ix = 0;
481 PL_savestack_max = 96; 751 PL_savestack_max = 24;
482 752
753#if !PERL_VERSION_ATLEAST (5,10,0)
483 New(54,PL_retstack,8,OP*); 754 New(54,PL_retstack,4,OP*);
484 PL_retstack_ix = 0; 755 PL_retstack_ix = 0;
485 PL_retstack_max = 8; 756 PL_retstack_max = 4;
757#endif
486} 758}
759#endif
487 760
488/* 761/*
489 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
490 * still there is a memleak of 128 bytes...
491 */ 763 */
492STATIC void 764static void
493destroy_stacks(pTHX) 765coro_destruct_stacks (pTHX)
494{ 766{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 while (PL_scopestack_ix)
499 LEAVE;
500
501 /* sure it is, but more important: is it correct?? :/ */
502 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503 FREETMPS;
504 }
505
506 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
508 769
509 while (PL_curstackinfo) 770 while (PL_curstackinfo)
510 { 771 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 772 PERL_SI *p = PL_curstackinfo->si_prev;
512 773
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 774 if (!IN_DESTRUCT)
520 {
521 dounwind(-1);
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 775 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 776
525 Safefree(PL_curstackinfo->si_cxstack); 777 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree(PL_curstackinfo); 778 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 779 PL_curstackinfo = p;
528 } 780 }
529 781
530 Safefree(PL_tmps_stack); 782 Safefree (PL_tmps_stack);
531 Safefree(PL_markstack); 783 Safefree (PL_markstack);
532 Safefree(PL_scopestack); 784 Safefree (PL_scopestack);
533 Safefree(PL_savestack); 785 Safefree (PL_savestack);
786#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree(PL_retstack); 787 Safefree (PL_retstack);
535}
536
537static void
538allocate_stack (Coro__State ctx, int alloc)
539{
540 coro_stack *stack;
541
542 New (0, stack, 1, coro_stack);
543
544 stack->refcnt = 1;
545 stack->usecnt = 1;
546 stack->gencnt = ctx->gencnt = 0;
547 if (alloc)
548 {
549#if HAVE_MMAP
550 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552 if (stack->sptr == (void *)-1)
553#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)
554 { 808 {
555 /*FIXME*//*D*//* reasonable stack size! */ 809 #define SYM(sym) PL_ ## sym
556 stack->ssize = -4096 * sizeof (long); 810 CORO_RSS;
557 New (0, stack->sptr, 4096, long); 811 #undef SYM
558 } 812 }
559 }
560 else 813 else
561 stack->sptr = 0;
562
563 ctx->stack = stack;
564}
565
566static void
567deallocate_stack (Coro__State ctx)
568{
569 coro_stack *stack = ctx->stack;
570
571 ctx->stack = 0;
572
573 if (stack)
574 {
575 if (!--stack->refcnt)
576 { 814 {
577#ifdef HAVE_MMAP 815 #define SYM(sym) coro->slot->sym
578 if (stack->ssize > 0 && stack->sptr) 816 CORO_RSS;
579 munmap (stack->sptr, stack->ssize); 817 #undef SYM
580 else 818 }
581#else 819 }
582 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)
583#endif 835#endif
584 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;
585 } 859 }
586 else if (ctx->gencnt == stack->gencnt) 860 }
587 --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 == '_')
588 } 871 {
589} 872 SV **svp = 0;
590 873
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
591static void 889static int
592setup_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)
593{ 936{
594 /* 937 /*
595 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
596 */ 939 */
940 coro_init_stacks (aTHX);
941
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;
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. Likewise, we cannot catch
1281 * runtime errors here, as this is just a random interpreter, not a thread.
1282 */
1283
1284 /*
1285 * If perl-run returns we assume exit() was being called or the coro
1286 * fell off the end, which seems to be the only valid (non-bug)
1287 * reason for perl_run to return. We try to exit by jumping to the
1288 * bootstrap-time "top" top_env, as we cannot restore the "main"
1289 * coroutine as Coro has no such concept.
1290 * This actually isn't valid with the pthread backend, but OSes requiring
1291 * that backend are too broken to do it in a standards-compliant way.
1292 */
1293 PL_top_env = main_top_env;
1294 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1295 }
1296}
1297
1298static coro_cctx *
1299cctx_new ()
1300{
1301 coro_cctx *cctx;
1302
1303 ++cctx_count;
1304 New (0, cctx, 1, coro_cctx);
1305
1306 cctx->gen = cctx_gen;
1307 cctx->flags = 0;
1308 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1309
1310 return cctx;
1311}
1312
1313/* create a new cctx only suitable as source */
1314static coro_cctx *
1315cctx_new_empty ()
1316{
1317 coro_cctx *cctx = cctx_new ();
1318
1319 cctx->sptr = 0;
1320 coro_create (&cctx->cctx, 0, 0, 0, 0);
1321
1322 return cctx;
1323}
1324
1325/* create a new cctx suitable as destination/running a perl interpreter */
1326static coro_cctx *
1327cctx_new_run ()
1328{
1329 coro_cctx *cctx = cctx_new ();
1330 void *stack_start;
1331 size_t stack_size;
1332
1333#if HAVE_MMAP
1334 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1335 /* mmap supposedly does allocate-on-write for us */
1336 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1337
1338 if (cctx->sptr != (void *)-1)
1339 {
1340 #if CORO_STACKGUARD
1341 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1342 #endif
1343 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1344 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1345 cctx->flags |= CC_MAPPED;
1346 }
1347 else
1348#endif
1349 {
1350 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1351 New (0, cctx->sptr, cctx_stacksize, long);
1352
1353 if (!cctx->sptr)
1354 {
1355 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1356 _exit (EXIT_FAILURE);
1357 }
1358
1359 stack_start = cctx->sptr;
1360 stack_size = cctx->ssize;
1361 }
1362
1363 #if CORO_USE_VALGRIND
1364 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1365 #endif
1366
1367 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1368
1369 return cctx;
1370}
1371
1372static void
1373cctx_destroy (coro_cctx *cctx)
1374{
1375 if (!cctx)
1376 return;
1377
1378 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1379
1380 --cctx_count;
1381 coro_destroy (&cctx->cctx);
1382
1383 /* coro_transfer creates new, empty cctx's */
1384 if (cctx->sptr)
1385 {
1386 #if CORO_USE_VALGRIND
1387 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1388 #endif
1389
1390#if HAVE_MMAP
1391 if (cctx->flags & CC_MAPPED)
1392 munmap (cctx->sptr, cctx->ssize);
1393 else
1394#endif
1395 Safefree (cctx->sptr);
1396 }
1397
1398 Safefree (cctx);
1399}
1400
1401/* wether this cctx should be destructed */
1402#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1403
1404static coro_cctx *
1405cctx_get (pTHX)
1406{
1407 while (expect_true (cctx_first))
1408 {
1409 coro_cctx *cctx = cctx_first;
1410 cctx_first = cctx->next;
1411 --cctx_idle;
1412
1413 if (expect_true (!CCTX_EXPIRED (cctx)))
1414 return cctx;
1415
1416 cctx_destroy (cctx);
1417 }
1418
1419 return cctx_new_run ();
1420}
1421
1422static void
1423cctx_put (coro_cctx *cctx)
1424{
1425 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1426
1427 /* free another cctx if overlimit */
1428 if (expect_false (cctx_idle >= cctx_max_idle))
1429 {
1430 coro_cctx *first = cctx_first;
1431 cctx_first = first->next;
1432 --cctx_idle;
1433
1434 cctx_destroy (first);
1435 }
1436
1437 ++cctx_idle;
1438 cctx->next = cctx_first;
1439 cctx_first = cctx;
1440}
1441
1442/** coroutine switching *****************************************************/
1443
1444static void
1445transfer_check (pTHX_ struct coro *prev, struct coro *next)
1446{
1447 /* TODO: throwing up here is considered harmful */
1448
1449 if (expect_true (prev != next))
1450 {
1451 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1452 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1453
1454 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1455 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1456
1457#if !PERL_VERSION_ATLEAST (5,10,0)
1458 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1459 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1460#endif
1461 }
1462}
1463
1464/* always use the TRANSFER macro */
1465static void NOINLINE /* noinline so we have a fixed stackframe */
1466transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1467{
1468 dSTACKLEVEL;
1469
1470 /* sometimes transfer is only called to set idle_sp */
1471 if (expect_false (!prev))
1472 {
1473 cctx_current->idle_sp = STACKLEVEL;
1474 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1475 }
1476 else if (expect_true (prev != next))
1477 {
1478 coro_cctx *cctx_prev;
1479
1480 if (expect_false (prev->flags & CF_NEW))
1481 {
1482 /* create a new empty/source context */
1483 prev->flags &= ~CF_NEW;
1484 prev->flags |= CF_RUNNING;
1485 }
1486
1487 prev->flags &= ~CF_RUNNING;
1488 next->flags |= CF_RUNNING;
1489
1490 /* first get rid of the old state */
1491 save_perl (aTHX_ prev);
1492
1493 if (expect_false (next->flags & CF_NEW))
1494 {
1495 /* need to start coroutine */
1496 next->flags &= ~CF_NEW;
1497 /* setup coroutine call */
1498 coro_setup (aTHX_ next);
1499 }
1500 else
1501 load_perl (aTHX_ next);
1502
1503 /* possibly untie and reuse the cctx */
1504 if (expect_true (
1505 cctx_current->idle_sp == STACKLEVEL
1506 && !(cctx_current->flags & CC_TRACE)
1507 && !force_cctx
1508 ))
1509 {
1510 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1511 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1512
1513 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1514 /* without this the next cctx_get might destroy the running cctx while still in use */
1515 if (expect_false (CCTX_EXPIRED (cctx_current)))
1516 if (expect_true (!next->cctx))
1517 next->cctx = cctx_get (aTHX);
1518
1519 cctx_put (cctx_current);
1520 }
1521 else
1522 prev->cctx = cctx_current;
1523
1524 ++next->usecount;
1525
1526 cctx_prev = cctx_current;
1527 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1528
1529 next->cctx = 0;
1530
1531 if (expect_false (cctx_prev != cctx_current))
1532 {
1533 cctx_prev->top_env = PL_top_env;
1534 PL_top_env = cctx_current->top_env;
1535 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1536 }
1537
1538 transfer_tail (aTHX);
1539 }
1540}
1541
1542#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1543#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1544
1545/** high level stuff ********************************************************/
1546
1547static int
1548coro_state_destroy (pTHX_ struct coro *coro)
1549{
1550 if (coro->flags & CF_DESTROYED)
1551 return 0;
1552
1553 if (coro->on_destroy && !PL_dirty)
1554 coro->on_destroy (aTHX_ coro);
1555
1556 coro->flags |= CF_DESTROYED;
1557
1558 if (coro->flags & CF_READY)
1559 {
1560 /* reduce nready, as destroying a ready coro effectively unreadies it */
1561 /* alternative: look through all ready queues and remove the coro */
1562 --coro_nready;
1563 }
1564 else
1565 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1566
1567 if (coro->mainstack
1568 && coro->mainstack != main_mainstack
1569 && coro->slot
1570 && !PL_dirty)
1571 coro_destruct_perl (aTHX_ coro);
1572
1573 cctx_destroy (coro->cctx);
1574 SvREFCNT_dec (coro->startcv);
1575 SvREFCNT_dec (coro->args);
1576 SvREFCNT_dec (CORO_THROW);
1577
1578 if (coro->next) coro->next->prev = coro->prev;
1579 if (coro->prev) coro->prev->next = coro->next;
1580 if (coro == coro_first) coro_first = coro->next;
1581
1582 return 1;
1583}
1584
1585static int
1586coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1587{
1588 struct coro *coro = (struct coro *)mg->mg_ptr;
1589 mg->mg_ptr = 0;
1590
1591 coro->hv = 0;
1592
1593 if (--coro->refcnt < 0)
1594 {
1595 coro_state_destroy (aTHX_ coro);
1596 Safefree (coro);
1597 }
1598
1599 return 0;
1600}
1601
1602static int
1603coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1604{
1605 struct coro *coro = (struct coro *)mg->mg_ptr;
1606
1607 ++coro->refcnt;
1608
1609 return 0;
1610}
1611
1612static MGVTBL coro_state_vtbl = {
1613 0, 0, 0, 0,
1614 coro_state_free,
1615 0,
1616#ifdef MGf_DUP
1617 coro_state_dup,
1618#else
1619# define MGf_DUP 0
1620#endif
1621};
1622
1623static void
1624prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1625{
1626 ta->prev = SvSTATE (prev_sv);
1627 ta->next = SvSTATE (next_sv);
1628 TRANSFER_CHECK (*ta);
1629}
1630
1631static void
1632api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1633{
1634 struct coro_transfer_args ta;
1635
1636 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1637 TRANSFER (ta, 1);
1638}
1639
1640/** Coro ********************************************************************/
1641
1642INLINE void
1643coro_enq (pTHX_ struct coro *coro)
1644{
1645 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1646
1647 SvREFCNT_inc_NN (coro->hv);
1648
1649 coro->next_ready = 0;
1650 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1651 ready [1] = coro;
1652}
1653
1654INLINE struct coro *
1655coro_deq (pTHX)
1656{
1657 int prio;
1658
1659 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1660 {
1661 struct coro **ready = coro_ready [prio];
1662
1663 if (ready [0])
1664 {
1665 struct coro *coro = ready [0];
1666 ready [0] = coro->next_ready;
1667 return coro;
1668 }
1669 }
1670
1671 return 0;
1672}
1673
1674static void
1675invoke_sv_ready_hook_helper (void)
1676{
1677 dTHX;
597 dSP; 1678 dSP;
598 Coro__State ctx = (Coro__State)arg;
599 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
600 1679
601 coro_init_stacks (aTHX); 1680 ENTER;
602 /*PL_curcop = 0;*/ 1681 SAVETMPS;
603 /*PL_in_eval = PL_in_eval;*/ /* inherit */
604 SvREFCNT_dec (GvAV (PL_defgv));
605 GvAV (PL_defgv) = ctx->args;
606 1682
607 SPAGAIN;
608
609 if (ctx->stack)
610 {
611 ctx->cursp = 0;
612
613 PUSHMARK(SP); 1683 PUSHMARK (SP);
614 PUTBACK; 1684 PUTBACK;
615 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1685 call_sv (coro_readyhook, G_VOID | G_DISCARD);
616 1686
617 if (SvTRUE (ERRSV)) 1687 FREETMPS;
618 croak (NULL); 1688 LEAVE;
619 else 1689}
620 croak ("FATAL: CCTXT coroutine returned!"); 1690
1691static int
1692api_ready (pTHX_ SV *coro_sv)
1693{
1694 struct coro *coro = SvSTATE (coro_sv);
1695
1696 if (coro->flags & CF_READY)
1697 return 0;
1698
1699 coro->flags |= CF_READY;
1700
1701 coro_enq (aTHX_ coro);
1702
1703 if (!coro_nready++)
1704 if (coroapi.readyhook)
1705 coroapi.readyhook ();
1706
1707 return 1;
1708}
1709
1710static int
1711api_is_ready (pTHX_ SV *coro_sv)
1712{
1713 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1714}
1715
1716/* expects to own a reference to next->hv */
1717INLINE void
1718prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1719{
1720 SV *prev_sv = SvRV (coro_current);
1721
1722 ta->prev = SvSTATE_hv (prev_sv);
1723 ta->next = next;
1724
1725 TRANSFER_CHECK (*ta);
1726
1727 SvRV_set (coro_current, (SV *)next->hv);
1728
1729 free_coro_mortal (aTHX);
1730 coro_mortal = prev_sv;
1731}
1732
1733static void
1734prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1735{
1736 for (;;)
621 } 1737 {
622 else 1738 struct coro *next = coro_deq (aTHX);
623 {
624 UNOP myop;
625 1739
626 PL_op = (OP *)&myop; 1740 if (expect_true (next))
627
628 Zero(&myop, 1, UNOP);
629 myop.op_next = Nullop;
630 myop.op_flags = OPf_WANT_VOID;
631
632 PUSHMARK(SP);
633 XPUSHs (sub_init);
634 /*
635 * the next line is slightly wrong, as PL_op->op_next
636 * is actually being executed so we skip the first op.
637 * that doesn't matter, though, since it is only
638 * pp_nextstate and we never return...
639 * ah yes, and I don't care anyways ;)
640 */
641 PUTBACK;
642 PL_op = PL_ppaddr[OP_ENTERSUB]();
643 SPAGAIN;
644
645 ENTER; /* necessary e.g. for dounwind */
646 }
647}
648
649static void
650continue_coro (void *arg)
651{
652 /*
653 * this is a _very_ stripped down perl interpreter ;)
654 */
655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
657
658 /* same as JMPENV_BOOTSTRAP */
659 Zero(&coro_start_env, 1, JMPENV);
660 coro_start_env.je_ret = -1;
661 coro_start_env.je_mustcatch = TRUE;
662 PL_top_env = &coro_start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671STATIC void
672transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675 static struct coro *xnext;
676
677 if (prev != next)
678 {
679 xnext = next;
680
681 if (next->mainstack)
682 { 1741 {
683 SAVE (prev, flags); 1742 /* cannot transfer to destroyed coros, skip and look for next */
684 LOAD (next); 1743 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
685 1744 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
686 /* mark this state as in-use */ 1745 else
687 next->mainstack = 0;
688 next->tmps_ix = -2;
689
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 { 1746 {
693 if (!prev->stack) 1747 next->flags &= ~CF_READY;
694 allocate_stack (prev, 0); 1748 --coro_nready;
695 else if (prev->cursp != stacklevel 1749
696 && prev->stack->usecnt > 1) 1750 prepare_schedule_to (aTHX_ ta, next);
697 { 1751 break;
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
714 } 1752 }
715
716 } 1753 }
717 else if (next->tmps_ix == -2)
718 croak ("tried to transfer to running coroutine");
719 else 1754 else
720 { 1755 {
721 SAVE (prev, -1); /* first get rid of the old state */ 1756 /* nothing to schedule: call the idle handler */
722 1757 if (SvROK (sv_idle)
723 if (flags & TRANSFER_SAVE_CCTXT) 1758 && SvOBJECT (SvRV (sv_idle)))
724 { 1759 {
725 if (!prev->stack) 1760 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
726 allocate_stack (prev, 0); 1761 api_ready (aTHX_ SvRV (sv_idle));
727 1762 --coro_nready;
728 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729 {
730 setup_coro (next);
731
732 prev->stack->refcnt++;
733 prev->stack->usecnt++;
734 next->stack = prev->stack;
735 next->gencnt = prev->gencnt;
736 }
737 else
738 {
739 allocate_stack (next, 1);
740 coro_create (&(next->stack->cctx),
741 setup_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
745 }
746 } 1763 }
747 else 1764 else
748 setup_coro (next); 1765 {
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
749 } 1778 }
750
751 /*
752 * xnext is now either prev or next, depending on wether
753 * we switched the c stack or not. that's why I use a global
754 * variable, that should become thread-specific at one point.
755 */
756 xnext->cursp = stacklevel;
757 }
758
759 if (coro_mortal)
760 { 1779 }
761 SvREFCNT_dec (coro_mortal); 1780}
762 coro_mortal = 0; 1781
1782INLINE void
1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
1784{
1785 api_ready (aTHX_ coro_current);
1786 prepare_schedule (aTHX_ ta);
1787}
1788
1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
1793
1794 if (coro_nready)
763 } 1795 {
764} 1796 prepare_schedule (aTHX_ ta);
765 1797 api_ready (aTHX_ prev);
766#define SV_CORO(sv,func) \
767 do { \
768 if (SvROK (sv)) \
769 sv = SvRV (sv); \
770 \
771 if (SvTYPE(sv) == SVt_PVHV) \
772 { \
773 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
774 \
775 if (!he) \
776 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
777 \
778 (sv) = SvRV (HeVAL(he)); \
779 } \
780 \
781 /* must also be changed inside Coro::Cont::yield */ \
782 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
783 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
784 \
785 } while(0)
786
787#define SvSTATE(sv) (struct coro *)SvIV (sv)
788
789static void
790api_transfer(pTHX_ SV *prev, SV *next, int flags)
791{
792 SV_CORO (prev, "Coro::transfer");
793 SV_CORO (next, "Coro::transfer");
794
795 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
796}
797
798/** Coro ********************************************************************/
799
800#define PRIO_MAX 3
801#define PRIO_HIGH 1
802#define PRIO_NORMAL 0
803#define PRIO_LOW -1
804#define PRIO_IDLE -3
805#define PRIO_MIN -4
806
807/* for Coro.pm */
808static GV *coro_current, *coro_idle;
809static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
810static int coro_nready;
811
812static void
813coro_enq (SV *sv)
814{
815 if (SvTYPE (sv) == SVt_PVHV)
816 { 1798 }
817 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1799 else
818 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1800 prepare_nop (aTHX_ ta);
1801}
819 1802
820 prio = prio > PRIO_MAX ? PRIO_MAX 1803static void
821 : prio < PRIO_MIN ? PRIO_MIN 1804api_schedule (pTHX)
822 : prio; 1805{
1806 struct coro_transfer_args ta;
823 1807
824 av_push (coro_ready [prio - PRIO_MIN], sv); 1808 prepare_schedule (aTHX_ &ta);
825 coro_nready++; 1809 TRANSFER (ta, 1);
1810}
826 1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1822static int
1823api_cede (pTHX)
1824{
1825 struct coro_transfer_args ta;
1826
1827 prepare_cede (aTHX_ &ta);
1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
827 return; 1832 return 1;
1833 }
1834 else
1835 return 0;
1836}
1837
1838static int
1839api_cede_notself (pTHX)
1840{
1841 if (coro_nready)
1842 {
1843 struct coro_transfer_args ta;
1844
1845 prepare_cede_notself (aTHX_ &ta);
1846 TRANSFER (ta, 1);
1847 return 1;
1848 }
1849 else
1850 return 0;
1851}
1852
1853static void
1854api_trace (pTHX_ SV *coro_sv, int flags)
1855{
1856 struct coro *coro = SvSTATE (coro_sv);
1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1861 if (flags & CC_TRACE)
1862 {
1863 if (!coro->cctx)
1864 coro->cctx = cctx_new_run ();
1865 else if (!(coro->cctx->flags & CC_TRACE))
1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1867
1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1869 }
1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1871 {
1872 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1873
1874 if (coro->flags & CF_RUNNING)
1875 PL_runops = RUNOPS_DEFAULT;
1876 else
1877 coro->slot->runops = RUNOPS_DEFAULT;
1878 }
1879}
1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
1892 {
1893 dSP; /* don't disturb outer sp */
1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1910 }
1911 }
1912}
1913
1914static void
1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
1920
1921 /* items are actually not so common, so optimise for this case */
1922 if (items)
1923 {
1924 av_extend (av, items - 1);
1925
1926 for (i = 0; i < items; ++i)
1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
1928 }
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
1950 struct coro *coro = (struct coro *)frame->data;
1951
1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
828 } 1965 }
829 1966
830 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)S_GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2105 SV *data = (SV *)S_GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
831} 2111}
832 2112
833static SV * 2113static SV *
834coro_deq (int min_prio) 2114coro_new_rouse_cb (pTHX)
835{ 2115{
836 int prio = PRIO_MAX - PRIO_MIN; 2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
837 2120
838 min_prio -= PRIO_MIN; 2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
839 if (min_prio < 0) 2122 SvREFCNT_dec (data); /* magicext increases the refcount */
840 min_prio = 0;
841 2123
842 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2124 SvREFCNT_dec (coro->rouse_cb);
843 if (av_len (coro_ready[prio]) >= 0) 2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
844 { 2258 {
845 coro_nready--; 2259 /* ampersand-form of call, use @_ instead of stack */
846 return av_shift (coro_ready[prio]); 2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
847 } 2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2337 slf_cv = cv;
2338
2339 /* we patch the op, and then re-run the whole call */
2340 /* we have to put the same argument on the stack for this to work */
2341 /* and this will be done by pp_restore */
2342 slf_restore.op_next = (OP *)&slf_restore;
2343 slf_restore.op_type = OP_CUSTOM;
2344 slf_restore.op_ppaddr = pp_restore;
2345 slf_restore.op_first = PL_op;
2346
2347 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2348
2349 if (PL_op->op_flags & OPf_STACKED)
2350 {
2351 if (items > slf_arga)
2352 {
2353 slf_arga = items;
2354 free (slf_argv);
2355 slf_argv = malloc (slf_arga * sizeof (SV *));
2356 }
2357
2358 slf_argc = items;
2359
2360 for (i = 0; i < items; ++i)
2361 slf_argv [i] = SvREFCNT_inc (arg [i]);
2362 }
2363 else
2364 slf_argc = 0;
2365
2366 PL_op->op_ppaddr = pp_slf;
2367 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2368
2369 PL_op = (OP *)&slf_restore;
2370}
2371
2372/*****************************************************************************/
2373/* dynamic wind */
2374
2375static void
2376on_enterleave_call (pTHX_ SV *cb)
2377{
2378 dSP;
2379
2380 PUSHSTACK;
2381
2382 PUSHMARK (SP);
2383 PUTBACK;
2384 call_sv (cb, G_VOID | G_DISCARD);
2385 SPAGAIN;
2386
2387 POPSTACK;
2388}
2389
2390static SV *
2391coro_avp_pop_and_free (pTHX_ AV **avp)
2392{
2393 AV *av = *avp;
2394 SV *res = av_pop (av);
2395
2396 if (AvFILLp (av) < 0)
2397 {
2398 *avp = 0;
2399 SvREFCNT_dec (av);
2400 }
2401
2402 return res;
2403}
2404
2405static void
2406coro_pop_on_enter (pTHX_ void *coro)
2407{
2408 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2409 SvREFCNT_dec (cb);
2410}
2411
2412static void
2413coro_pop_on_leave (pTHX_ void *coro)
2414{
2415 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2416 on_enterleave_call (aTHX_ sv_2mortal (cb));
2417}
2418
2419/*****************************************************************************/
2420/* PerlIO::cede */
2421
2422typedef struct
2423{
2424 PerlIOBuf base;
2425 NV next, every;
2426} PerlIOCede;
2427
2428static IV
2429PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432
2433 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2434 self->next = nvtime () + self->every;
2435
2436 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2437}
2438
2439static SV *
2440PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2441{
2442 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2443
2444 return newSVnv (self->every);
2445}
2446
2447static IV
2448PerlIOCede_flush (pTHX_ PerlIO *f)
2449{
2450 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2451 double now = nvtime ();
2452
2453 if (now >= self->next)
2454 {
2455 api_cede (aTHX);
2456 self->next = now + self->every;
2457 }
2458
2459 return PerlIOBuf_flush (aTHX_ f);
2460}
2461
2462static PerlIO_funcs PerlIO_cede =
2463{
2464 sizeof(PerlIO_funcs),
2465 "cede",
2466 sizeof(PerlIOCede),
2467 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2468 PerlIOCede_pushed,
2469 PerlIOBuf_popped,
2470 PerlIOBuf_open,
2471 PerlIOBase_binmode,
2472 PerlIOCede_getarg,
2473 PerlIOBase_fileno,
2474 PerlIOBuf_dup,
2475 PerlIOBuf_read,
2476 PerlIOBuf_unread,
2477 PerlIOBuf_write,
2478 PerlIOBuf_seek,
2479 PerlIOBuf_tell,
2480 PerlIOBuf_close,
2481 PerlIOCede_flush,
2482 PerlIOBuf_fill,
2483 PerlIOBase_eof,
2484 PerlIOBase_error,
2485 PerlIOBase_clearerr,
2486 PerlIOBase_setlinebuf,
2487 PerlIOBuf_get_base,
2488 PerlIOBuf_bufsiz,
2489 PerlIOBuf_get_ptr,
2490 PerlIOBuf_get_cnt,
2491 PerlIOBuf_set_ptrcnt,
2492};
2493
2494/*****************************************************************************/
2495/* Coro::Semaphore & Coro::Signal */
2496
2497static SV *
2498coro_waitarray_new (pTHX_ int count)
2499{
2500 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2501 AV *av = newAV ();
2502 SV **ary;
2503
2504 /* unfortunately, building manually saves memory */
2505 Newx (ary, 2, SV *);
2506 AvALLOC (av) = ary;
2507#if PERL_VERSION_ATLEAST (5,10,0)
2508 AvARRAY (av) = ary;
2509#else
2510 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2511 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2512 SvPVX ((SV *)av) = (char *)ary;
2513#endif
2514 AvMAX (av) = 1;
2515 AvFILLp (av) = 0;
2516 ary [0] = newSViv (count);
2517
2518 return newRV_noinc ((SV *)av);
2519}
2520
2521/* semaphore */
2522
2523static void
2524coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2525{
2526 SV *count_sv = AvARRAY (av)[0];
2527 IV count = SvIVX (count_sv);
2528
2529 count += adjust;
2530 SvIVX (count_sv) = count;
2531
2532 /* now wake up as many waiters as are expected to lock */
2533 while (count > 0 && AvFILLp (av) > 0)
2534 {
2535 SV *cb;
2536
2537 /* swap first two elements so we can shift a waiter */
2538 AvARRAY (av)[0] = AvARRAY (av)[1];
2539 AvARRAY (av)[1] = count_sv;
2540 cb = av_shift (av);
2541
2542 if (SvOBJECT (cb))
2543 {
2544 api_ready (aTHX_ cb);
2545 --count;
2546 }
2547 else if (SvTYPE (cb) == SVt_PVCV)
2548 {
2549 dSP;
2550 PUSHMARK (SP);
2551 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2554 }
2555
2556 SvREFCNT_dec (cb);
2557 }
2558}
2559
2560static void
2561coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2562{
2563 /* call $sem->adjust (0) to possibly wake up some other waiters */
2564 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2565}
2566
2567static int
2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2569{
2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
2572
2573 /* if we are about to throw, don't actually acquire the lock, just throw */
2574 if (CORO_THROW)
2575 return 0;
2576 else if (SvIVX (count_sv) > 0)
2577 {
2578 SvSTATE_current->on_destroy = 0;
2579
2580 if (acquire)
2581 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2582 else
2583 coro_semaphore_adjust (aTHX_ av, 0);
2584
2585 return 0;
2586 }
2587 else
2588 {
2589 int i;
2590 /* if we were woken up but can't down, we look through the whole */
2591 /* waiters list and only add us if we aren't in there already */
2592 /* this avoids some degenerate memory usage cases */
2593
2594 for (i = 1; i <= AvFILLp (av); ++i)
2595 if (AvARRAY (av)[i] == SvRV (coro_current))
2596 return 1;
2597
2598 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2599 return 1;
2600 }
2601}
2602
2603static int
2604slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2607}
2608
2609static int
2610slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2611{
2612 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2613}
2614
2615static void
2616slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2617{
2618 AV *av = (AV *)SvRV (arg [0]);
2619
2620 if (SvIVX (AvARRAY (av)[0]) > 0)
2621 {
2622 frame->data = (void *)av;
2623 frame->prepare = prepare_nop;
2624 }
2625 else
2626 {
2627 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2628
2629 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2630 frame->prepare = prepare_schedule;
2631
2632 /* to avoid race conditions when a woken-up coro gets terminated */
2633 /* we arrange for a temporary on_destroy that calls adjust (0) */
2634 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2635 }
2636}
2637
2638static void
2639slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2642 frame->check = slf_check_semaphore_down;
2643}
2644
2645static void
2646slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (items >= 2)
2649 {
2650 /* callback form */
2651 AV *av = (AV *)SvRV (arg [0]);
2652 SV *cb_cv = s_get_cv_croak (arg [1]);
2653
2654 av_push (av, SvREFCNT_inc_NN (cb_cv));
2655
2656 if (SvIVX (AvARRAY (av)[0]) > 0)
2657 coro_semaphore_adjust (aTHX_ av, 0);
2658
2659 frame->prepare = prepare_nop;
2660 frame->check = slf_check_nop;
2661 }
2662 else
2663 {
2664 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2665 frame->check = slf_check_semaphore_wait;
2666 }
2667}
2668
2669/* signal */
2670
2671static void
2672coro_signal_wake (pTHX_ AV *av, int count)
2673{
2674 SvIVX (AvARRAY (av)[0]) = 0;
2675
2676 /* now signal count waiters */
2677 while (count > 0 && AvFILLp (av) > 0)
2678 {
2679 SV *cb;
2680
2681 /* swap first two elements so we can shift a waiter */
2682 cb = AvARRAY (av)[0];
2683 AvARRAY (av)[0] = AvARRAY (av)[1];
2684 AvARRAY (av)[1] = cb;
2685
2686 cb = av_shift (av);
2687
2688 if (SvTYPE (cb) == SVt_PVCV)
2689 {
2690 dSP;
2691 PUSHMARK (SP);
2692 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2693 PUTBACK;
2694 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2695 }
2696 else
2697 {
2698 api_ready (aTHX_ cb);
2699 sv_setiv (cb, 0); /* signal waiter */
2700 }
2701
2702 SvREFCNT_dec (cb);
2703
2704 --count;
2705 }
2706}
2707
2708static int
2709slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2710{
2711 /* if we are about to throw, also stop waiting */
2712 return SvROK ((SV *)frame->data) && !CORO_THROW;
2713}
2714
2715static void
2716slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 AV *av = (AV *)SvRV (arg [0]);
2719
2720 if (items >= 2)
2721 {
2722 SV *cb_cv = s_get_cv_croak (arg [1]);
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]))
2726 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else if (SvIVX (AvARRAY (av)[0]))
2732 {
2733 SvIVX (AvARRAY (av)[0]) = 0;
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2740
2741 av_push (av, waiter);
2742
2743 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2744 frame->prepare = prepare_schedule;
2745 frame->check = slf_check_signal_wait;
2746 }
2747}
2748
2749/*****************************************************************************/
2750/* Coro::AIO */
2751
2752#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2753
2754/* helper storage struct */
2755struct io_state
2756{
2757 int errorno;
2758 I32 laststype; /* U16 in 5.10.0 */
2759 int laststatval;
2760 Stat_t statcache;
2761};
2762
2763static void
2764coro_aio_callback (pTHX_ CV *cv)
2765{
2766 dXSARGS;
2767 AV *state = (AV *)S_GENSUB_ARG;
2768 SV *coro = av_pop (state);
2769 SV *data_sv = newSV (sizeof (struct io_state));
2770
2771 av_extend (state, items - 1);
2772
2773 sv_upgrade (data_sv, SVt_PV);
2774 SvCUR_set (data_sv, sizeof (struct io_state));
2775 SvPOK_only (data_sv);
2776
2777 {
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 data->errorno = errno;
2781 data->laststype = PL_laststype;
2782 data->laststatval = PL_laststatval;
2783 data->statcache = PL_statcache;
2784 }
2785
2786 /* now build the result vector out of all the parameters and the data_sv */
2787 {
2788 int i;
2789
2790 for (i = 0; i < items; ++i)
2791 av_push (state, SvREFCNT_inc_NN (ST (i)));
2792 }
2793
2794 av_push (state, data_sv);
2795
2796 api_ready (aTHX_ coro);
2797 SvREFCNT_dec (coro);
2798 SvREFCNT_dec ((AV *)state);
2799}
2800
2801static int
2802slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2803{
2804 AV *state = (AV *)frame->data;
2805
2806 /* if we are about to throw, return early */
2807 /* this does not cancel the aio request, but at least */
2808 /* it quickly returns */
2809 if (CORO_THROW)
2810 return 0;
2811
2812 /* one element that is an RV? repeat! */
2813 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2814 return 1;
2815
2816 /* restore status */
2817 {
2818 SV *data_sv = av_pop (state);
2819 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2820
2821 errno = data->errorno;
2822 PL_laststype = data->laststype;
2823 PL_laststatval = data->laststatval;
2824 PL_statcache = data->statcache;
2825
2826 SvREFCNT_dec (data_sv);
2827 }
2828
2829 /* push result values */
2830 {
2831 dSP;
2832 int i;
2833
2834 EXTEND (SP, AvFILLp (state) + 1);
2835 for (i = 0; i <= AvFILLp (state); ++i)
2836 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2837
2838 PUTBACK;
2839 }
848 2840
849 return 0; 2841 return 0;
850} 2842}
851 2843
852static void 2844static void
853api_ready (SV *coro) 2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
854{ 2846{
855 if (SvROK (coro)) 2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
856 coro = SvRV (coro);
857
858 coro_enq (SvREFCNT_inc (coro));
859}
860
861static void
862api_schedule (void)
863{
864 SV *prev, *next;
865
866 prev = SvRV (GvSV (coro_current)); 2848 SV *coro_hv = SvRV (coro_current);
867 next = coro_deq (PRIO_MIN); 2849 struct coro *coro = SvSTATE_hv (coro_hv);
868 2850
869 if (!next) 2851 /* put our coroutine id on the state arg */
870 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
871 2853
872 /* free this only after the transfer */ 2854 /* first see whether we have a non-zero priority and set it as AIO prio */
873 coro_mortal = prev; 2855 if (coro->prio)
874 SV_CORO (prev, "Coro::schedule"); 2856 {
2857 dSP;
875 2858
876 SvRV (GvSV (coro_current)) = next; 2859 static SV *prio_cv;
2860 static SV *prio_sv;
877 2861
878 SV_CORO (next, "Coro::schedule"); 2862 if (expect_false (!prio_cv))
2863 {
2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2865 prio_sv = newSViv (0);
2866 }
879 2867
880 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2868 PUSHMARK (SP);
881 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2869 sv_setiv (prio_sv, coro->prio);
882} 2870 XPUSHs (prio_sv);
883 2871
884static void 2872 PUTBACK;
885api_cede (void) 2873 call_sv (prio_cv, G_VOID | G_DISCARD);
886{ 2874 }
887 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
888 2875
889 api_schedule (); 2876 /* now call the original request */
890} 2877 {
2878 dSP;
2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2880 int i;
891 2881
2882 PUSHMARK (SP);
2883
2884 /* first push all args to the stack */
2885 EXTEND (SP, items + 1);
2886
2887 for (i = 0; i < items; ++i)
2888 PUSHs (arg [i]);
2889
2890 /* now push the callback closure */
2891 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2892
2893 /* now call the AIO function - we assume our request is uncancelable */
2894 PUTBACK;
2895 call_sv ((SV *)req, G_VOID | G_DISCARD);
2896 }
2897
2898 /* now that the requets is going, we loop toll we have a result */
2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
2902}
2903
2904static void
2905coro_aio_req_xs (pTHX_ CV *cv)
2906{
2907 dXSARGS;
2908
2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2910
2911 XSRETURN_EMPTY;
2912}
2913
2914/*****************************************************************************/
2915
2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
2919
2920/*****************************************************************************/
2921
2922static SV *
2923coro_new (HV *stash, SV **argv, int argc, int is_coro)
2924{
2925 SV *coro_sv;
2926 struct coro *coro;
2927 MAGIC *mg;
2928 HV *hv;
2929 SV *cb;
2930 int i;
2931
2932 if (argc > 0)
2933 {
2934 cb = s_get_cv_croak (argv [0]);
2935
2936 if (!is_coro)
2937 {
2938 if (CvISXSUB (cb))
2939 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2940
2941 if (!CvROOT (cb))
2942 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2943 }
2944 }
2945
2946 Newz (0, coro, 1, struct coro);
2947 coro->args = newAV ();
2948 coro->flags = CF_NEW;
2949
2950 if (coro_first) coro_first->prev = coro;
2951 coro->next = coro_first;
2952 coro_first = coro;
2953
2954 coro->hv = hv = newHV ();
2955 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2956 mg->mg_flags |= MGf_DUP;
2957 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2958
2959 if (argc > 0)
2960 {
2961 av_extend (coro->args, argc + is_coro - 1);
2962
2963 if (is_coro)
2964 {
2965 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2966 cb = (SV *)cv_coro_run;
2967 }
2968
2969 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2970
2971 for (i = 1; i < argc; i++)
2972 av_push (coro->args, newSVsv (argv [i]));
2973 }
2974
2975 return coro_sv;
2976}
2977
892MODULE = Coro::State PACKAGE = Coro::State 2978MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
893 2979
894PROTOTYPES: ENABLE 2980PROTOTYPES: DISABLE
895 2981
896BOOT: 2982BOOT:
897{ /* {} necessary for stoopid perl-5.6.x */ 2983{
898 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2984#ifdef USE_ITHREADS
899 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2985# if CORO_PTHREAD
2986 coro_thx = PERL_GET_CONTEXT;
2987# endif
2988#endif
2989 BOOT_PAGESIZE;
2990
2991 cctx_current = cctx_new_empty ();
2992
2993 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2994 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2995
2996 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2997 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2998 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2999
3000 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3001 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3002 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3003
900 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3004 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901 3005
902 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3006 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
903 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3007 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
904 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3008 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
905 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3009 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
906
907 if (!padlist_cache)
908 padlist_cache = newHV ();
909 3010
910 main_mainstack = PL_mainstack; 3011 main_mainstack = PL_mainstack;
3012 main_top_env = PL_top_env;
911 3013
3014 while (main_top_env->je_prev)
3015 main_top_env = main_top_env->je_prev;
3016
3017 {
3018 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3019
3020 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3021 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3022
3023 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3024 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3025 }
3026
912 coroapi.ver = CORO_API_VERSION; 3027 coroapi.ver = CORO_API_VERSION;
3028 coroapi.rev = CORO_API_REVISION;
3029
913 coroapi.transfer = api_transfer; 3030 coroapi.transfer = api_transfer;
914}
915 3031
916Coro::State 3032 coroapi.sv_state = SvSTATE_;
917_newprocess(args) 3033 coroapi.execute_slf = api_execute_slf;
918 SV * args 3034 coroapi.prepare_nop = prepare_nop;
3035 coroapi.prepare_schedule = prepare_schedule;
3036 coroapi.prepare_cede = prepare_cede;
3037 coroapi.prepare_cede_notself = prepare_cede_notself;
3038
3039 {
3040 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3041
3042 if (!svp) croak ("Time::HiRes is required");
3043 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3044
3045 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3046
3047 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3048 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3049 }
3050
3051 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3052}
3053
3054SV *
3055new (SV *klass, ...)
3056 ALIAS:
3057 Coro::new = 1
3058 CODE:
3059 RETVAL = coro_new (ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3060 OUTPUT:
3061 RETVAL
3062
3063void
3064transfer (...)
3065 PROTOTYPE: $$
3066 CODE:
3067 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3068
3069bool
3070_destroy (SV *coro_sv)
3071 CODE:
3072 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3073 OUTPUT:
3074 RETVAL
3075
3076void
3077_exit (int code)
919 PROTOTYPE: $ 3078 PROTOTYPE: $
3079 CODE:
3080 _exit (code);
3081
3082SV *
3083clone (Coro::State coro)
3084 CODE:
3085{
3086#if CORO_CLONE
3087 struct coro *ncoro = coro_clone (aTHX_ coro);
3088 MAGIC *mg;
3089 /* TODO: too much duplication */
3090 ncoro->hv = newHV ();
3091 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3092 mg->mg_flags |= MGf_DUP;
3093 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3094#else
3095 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3096#endif
3097}
3098 OUTPUT:
3099 RETVAL
3100
3101int
3102cctx_stacksize (int new_stacksize = 0)
3103 PROTOTYPE: ;$
3104 CODE:
3105 RETVAL = cctx_stacksize;
3106 if (new_stacksize)
3107 {
3108 cctx_stacksize = new_stacksize;
3109 ++cctx_gen;
3110 }
3111 OUTPUT:
3112 RETVAL
3113
3114int
3115cctx_max_idle (int max_idle = 0)
3116 PROTOTYPE: ;$
3117 CODE:
3118 RETVAL = cctx_max_idle;
3119 if (max_idle > 1)
3120 cctx_max_idle = max_idle;
3121 OUTPUT:
3122 RETVAL
3123
3124int
3125cctx_count ()
3126 PROTOTYPE:
3127 CODE:
3128 RETVAL = cctx_count;
3129 OUTPUT:
3130 RETVAL
3131
3132int
3133cctx_idle ()
3134 PROTOTYPE:
3135 CODE:
3136 RETVAL = cctx_idle;
3137 OUTPUT:
3138 RETVAL
3139
3140void
3141list ()
3142 PROTOTYPE:
3143 PPCODE:
3144{
3145 struct coro *coro;
3146 for (coro = coro_first; coro; coro = coro->next)
3147 if (coro->hv)
3148 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3149}
3150
3151void
3152call (Coro::State coro, SV *coderef)
3153 ALIAS:
3154 eval = 1
3155 CODE:
3156{
3157 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3158 {
3159 struct coro *current = SvSTATE_current;
3160
3161 if (current != coro)
3162 {
3163 PUTBACK;
3164 save_perl (aTHX_ current);
3165 load_perl (aTHX_ coro);
3166 SPAGAIN;
3167 }
3168
3169 PUSHSTACK;
3170
3171 PUSHMARK (SP);
3172 PUTBACK;
3173
3174 if (ix)
3175 eval_sv (coderef, 0);
3176 else
3177 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3178
3179 POPSTACK;
3180 SPAGAIN;
3181
3182 if (current != coro)
3183 {
3184 PUTBACK;
3185 save_perl (aTHX_ coro);
3186 load_perl (aTHX_ current);
3187 SPAGAIN;
3188 }
3189 }
3190}
3191
3192SV *
3193is_ready (Coro::State coro)
3194 PROTOTYPE: $
3195 ALIAS:
3196 is_ready = CF_READY
3197 is_running = CF_RUNNING
3198 is_new = CF_NEW
3199 is_destroyed = CF_DESTROYED
3200 is_suspended = CF_SUSPENDED
3201 CODE:
3202 RETVAL = boolSV (coro->flags & ix);
3203 OUTPUT:
3204 RETVAL
3205
3206void
3207throw (Coro::State self, SV *throw = &PL_sv_undef)
3208 PROTOTYPE: $;$
920 CODE: 3209 CODE:
921 Coro__State coro; 3210{
3211 struct coro *current = SvSTATE_current;
3212 SV **throwp = self == current ? &CORO_THROW : &self->except;
3213 SvREFCNT_dec (*throwp);
3214 SvGETMAGIC (throw);
3215 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3216}
922 3217
923 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3218void
924 croak ("Coro::State::_newprocess expects an arrayref"); 3219api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3220 PROTOTYPE: $;$
3221 C_ARGS: aTHX_ coro, flags
3222
3223SV *
3224has_cctx (Coro::State coro)
3225 PROTOTYPE: $
3226 CODE:
3227 /* maybe manage the running flag differently */
3228 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3229 OUTPUT:
3230 RETVAL
3231
3232int
3233is_traced (Coro::State coro)
3234 PROTOTYPE: $
3235 CODE:
3236 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3237 OUTPUT:
3238 RETVAL
3239
3240UV
3241rss (Coro::State coro)
3242 PROTOTYPE: $
3243 ALIAS:
3244 usecount = 1
3245 CODE:
3246 switch (ix)
3247 {
3248 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3249 case 1: RETVAL = coro->usecount; break;
925 3250 }
926 New (0, coro, 1, struct coro); 3251 OUTPUT:
927
928 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
929 coro->mainstack = 0; /* actual work is done inside transfer */
930 coro->stack = 0;
931
932 RETVAL = coro; 3252 RETVAL
3253
3254void
3255force_cctx ()
3256 PROTOTYPE:
3257 CODE:
3258 cctx_current->idle_sp = 0;
3259
3260void
3261swap_defsv (Coro::State self)
3262 PROTOTYPE: $
3263 ALIAS:
3264 swap_defav = 1
3265 CODE:
3266 if (!self->slot)
3267 croak ("cannot swap state with coroutine that has no saved state,");
3268 else
3269 {
3270 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3271 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3272
3273 SV *tmp = *src; *src = *dst; *dst = tmp;
3274 }
3275
3276void
3277cancel (Coro::State self)
3278 CODE:
3279 coro_state_destroy (aTHX_ self);
3280 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3281
3282
3283SV *
3284enable_times (int enabled = enable_times)
3285 CODE:
3286{
3287 RETVAL = boolSV (enable_times);
3288
3289 if (enabled != enable_times)
3290 {
3291 enable_times = enabled;
3292
3293 coro_times_update ();
3294 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3295 }
3296}
933 OUTPUT: 3297 OUTPUT:
934 RETVAL 3298 RETVAL
935 3299
936void 3300void
937transfer(prev, next, flags) 3301times (Coro::State self)
938 SV *prev 3302 PPCODE:
939 SV *next 3303{
940 int flags 3304 struct coro *current = SvSTATE (coro_current);
941 PROTOTYPE: @ 3305
3306 if (expect_false (current == self))
3307 {
3308 coro_times_update ();
3309 coro_times_add (SvSTATE (coro_current));
3310 }
3311
3312 EXTEND (SP, 2);
3313 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3314 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3315
3316 if (expect_false (current == self))
3317 coro_times_sub (SvSTATE (coro_current));
3318}
3319
3320MODULE = Coro::State PACKAGE = Coro
3321
3322BOOT:
3323{
3324 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3325 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3326 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3327 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3328 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3329 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3330 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3331 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3332 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3333
3334 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3335 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3336 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3337 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3338
3339 coro_stash = gv_stashpv ("Coro", TRUE);
3340
3341 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3342 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3343 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3344 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3345 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3346 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3347
3348 {
3349 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3350
3351 coroapi.schedule = api_schedule;
3352 coroapi.schedule_to = api_schedule_to;
3353 coroapi.cede = api_cede;
3354 coroapi.cede_notself = api_cede_notself;
3355 coroapi.ready = api_ready;
3356 coroapi.is_ready = api_is_ready;
3357 coroapi.nready = coro_nready;
3358 coroapi.current = coro_current;
3359
3360 /*GCoroAPI = &coroapi;*/
3361 sv_setiv (sv, (IV)&coroapi);
3362 SvREADONLY_on (sv);
3363 }
3364}
3365
3366SV *
3367async (...)
3368 PROTOTYPE: &@
942 CODE: 3369 CODE:
943 PUTBACK; 3370 RETVAL = coro_new (coro_stash, &ST (0), items, 1);
944 SV_CORO (next, "Coro::transfer"); 3371 api_ready (RETVAL);
945 SV_CORO (prev, "Coro::transfer"); 3372 OUTPUT:
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3373 RETVAL
947 SPAGAIN;
948 3374
949void 3375void
950DESTROY(coro) 3376terminate (...)
951 Coro::State coro 3377 CODE:
952 CODE: 3378 CORO_EXECUTE_SLF_XS (slf_init_terminate);
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 3379
975void 3380void
976flush() 3381schedule (...)
977 CODE: 3382 CODE:
978#ifdef MAY_FLUSH 3383 CORO_EXECUTE_SLF_XS (slf_init_schedule);
979 flush_padlist_cache ();
980#endif
981 3384
982void 3385void
983_exit(code) 3386schedule_to (...)
984 int code 3387 CODE:
3388 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3389
3390void
3391cede_to (...)
3392 CODE:
3393 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3394
3395void
3396cede (...)
3397 CODE:
3398 CORO_EXECUTE_SLF_XS (slf_init_cede);
3399
3400void
3401cede_notself (...)
3402 CODE:
3403 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3404
3405void
3406_set_current (SV *current)
985 PROTOTYPE: $ 3407 PROTOTYPE: $
986 CODE: 3408 CODE:
987#if defined(__GLIBC__) || _POSIX_C_SOURCE 3409 SvREFCNT_dec (SvRV (coro_current));
988 _exit (code); 3410 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
989#else
990 signal (SIGTERM, SIG_DFL);
991 raise (SIGTERM);
992 exit (code);
993#endif
994
995MODULE = Coro::State PACKAGE = Coro::Cont
996
997# this is slightly dirty (should expose a c-level api)
998 3411
999void 3412void
1000yield(...) 3413_set_readyhook (SV *hook)
1001 PROTOTYPE: @ 3414 PROTOTYPE: $
1002 CODE: 3415 CODE:
1003 static SV *returnstk;
1004 SV *sv;
1005 AV *defav = GvAV (PL_defgv);
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); 3416 SvREFCNT_dec (coro_readyhook);
1022 3417 SvGETMAGIC (hook);
1023 transfer(aTHX_ prev, next, 0); 3418 if (SvOK (hook))
1024 3419 {
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 (); 3420 coro_readyhook = newSVsv (hook);
1046 3421 CORO_READYHOOK = invoke_sv_ready_hook_helper;
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 } 3422 }
1060} 3423 else
3424 {
3425 coro_readyhook = 0;
3426 CORO_READYHOOK = 0;
3427 }
1061 3428
1062void 3429int
3430prio (Coro::State coro, int newprio = 0)
3431 PROTOTYPE: $;$
3432 ALIAS:
3433 nice = 1
3434 CODE:
3435{
3436 RETVAL = coro->prio;
3437
3438 if (items > 1)
3439 {
3440 if (ix)
3441 newprio = coro->prio - newprio;
3442
3443 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3444 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3445
3446 coro->prio = newprio;
3447 }
3448}
3449 OUTPUT:
3450 RETVAL
3451
3452SV *
1063ready(self) 3453ready (SV *self)
1064 SV * self
1065 PROTOTYPE: $ 3454 PROTOTYPE: $
1066 CODE: 3455 CODE:
1067 api_ready (self); 3456 RETVAL = boolSV (api_ready (aTHX_ self));
3457 OUTPUT:
3458 RETVAL
1068 3459
1069int 3460int
1070nready(...) 3461nready (...)
1071 PROTOTYPE: 3462 PROTOTYPE:
1072 CODE: 3463 CODE:
1073 RETVAL = coro_nready; 3464 RETVAL = coro_nready;
1074 OUTPUT: 3465 OUTPUT:
1075 RETVAL 3466 RETVAL
1076 3467
1077void 3468void
1078schedule(...) 3469suspend (Coro::State self)
1079 PROTOTYPE: 3470 PROTOTYPE: $
1080 CODE: 3471 CODE:
1081 api_schedule (); 3472 self->flags |= CF_SUSPENDED;
1082 3473
1083void 3474void
1084cede(...) 3475resume (Coro::State self)
1085 PROTOTYPE: 3476 PROTOTYPE: $
1086 CODE: 3477 CODE:
3478 self->flags &= ~CF_SUSPENDED;
3479
3480void
3481_pool_handler (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3484
3485void
3486async_pool (SV *cv, ...)
3487 PROTOTYPE: &@
3488 PPCODE:
3489{
3490 HV *hv = (HV *)av_pop (av_async_pool);
3491 AV *av = newAV ();
3492 SV *cb = ST (0);
3493 int i;
3494
3495 av_extend (av, items - 2);
3496 for (i = 1; i < items; ++i)
3497 av_push (av, SvREFCNT_inc_NN (ST (i)));
3498
3499 if ((SV *)hv == &PL_sv_undef)
3500 {
3501 PUSHMARK (SP);
3502 EXTEND (SP, 2);
3503 PUSHs (sv_Coro);
3504 PUSHs ((SV *)cv_pool_handler);
3505 PUTBACK;
3506 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3507 SPAGAIN;
3508
3509 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3510 }
3511
3512 {
3513 struct coro *coro = SvSTATE_hv (hv);
3514
3515 assert (!coro->invoke_cb);
3516 assert (!coro->invoke_av);
3517 coro->invoke_cb = SvREFCNT_inc (cb);
3518 coro->invoke_av = av;
3519 }
3520
3521 api_ready (aTHX_ (SV *)hv);
3522
3523 if (GIMME_V != G_VOID)
3524 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3525 else
3526 SvREFCNT_dec (hv);
3527}
3528
3529SV *
3530rouse_cb ()
3531 PROTOTYPE:
3532 CODE:
3533 RETVAL = coro_new_rouse_cb (aTHX);
3534 OUTPUT:
3535 RETVAL
3536
3537void
3538rouse_wait (...)
3539 PROTOTYPE: ;$
3540 PPCODE:
3541 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3542
3543void
3544on_enter (SV *block)
3545 ALIAS:
3546 on_leave = 1
3547 PROTOTYPE: &
3548 CODE:
3549{
3550 struct coro *coro = SvSTATE_current;
3551 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3552
3553 block = s_get_cv_croak (block);
3554
3555 if (!*avp)
3556 *avp = newAV ();
3557
3558 av_push (*avp, SvREFCNT_inc (block));
3559
3560 if (!ix)
3561 on_enterleave_call (aTHX_ block);
3562
3563 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3564 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3565 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3566}
3567
3568
3569MODULE = Coro::State PACKAGE = PerlIO::cede
3570
3571BOOT:
3572 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3573
3574
3575MODULE = Coro::State PACKAGE = Coro::Semaphore
3576
3577SV *
3578new (SV *klass, SV *count = 0)
3579 CODE:
3580{
3581 int semcnt = 1;
3582
3583 if (count)
3584 {
3585 SvGETMAGIC (count);
3586
3587 if (SvOK (count))
3588 semcnt = SvIV (count);
3589 }
3590
3591 RETVAL = sv_bless (
3592 coro_waitarray_new (aTHX_ semcnt),
3593 GvSTASH (CvGV (cv))
3594 );
3595}
3596 OUTPUT:
3597 RETVAL
3598
3599# helper for Coro::Channel and others
3600SV *
3601_alloc (int count)
3602 CODE:
3603 RETVAL = coro_waitarray_new (aTHX_ count);
3604 OUTPUT:
3605 RETVAL
3606
3607SV *
3608count (SV *self)
3609 CODE:
3610 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3611 OUTPUT:
3612 RETVAL
3613
3614void
3615up (SV *self, int adjust = 1)
3616 ALIAS:
3617 adjust = 1
3618 CODE:
3619 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3620
3621void
3622down (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3625
3626void
3627wait (...)
3628 CODE:
3629 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3630
3631void
3632try (SV *self)
3633 PPCODE:
3634{
3635 AV *av = (AV *)SvRV (self);
3636 SV *count_sv = AvARRAY (av)[0];
3637 IV count = SvIVX (count_sv);
3638
3639 if (count > 0)
3640 {
3641 --count;
3642 SvIVX (count_sv) = count;
3643 XSRETURN_YES;
3644 }
3645 else
3646 XSRETURN_NO;
3647}
3648
3649void
3650waiters (SV *self)
3651 PPCODE:
3652{
3653 AV *av = (AV *)SvRV (self);
3654 int wcount = AvFILLp (av) + 1 - 1;
3655
3656 if (GIMME_V == G_SCALAR)
3657 XPUSHs (sv_2mortal (newSViv (wcount)));
3658 else
3659 {
3660 int i;
3661 EXTEND (SP, wcount);
3662 for (i = 1; i <= wcount; ++i)
3663 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3664 }
3665}
3666
3667MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3668
3669void
3670_may_delete (SV *sem, int count, int extra_refs)
3671 PPCODE:
3672{
3673 AV *av = (AV *)SvRV (sem);
3674
3675 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3676 && AvFILLp (av) == 0 /* no waiters, just count */
3677 && SvIV (AvARRAY (av)[0]) == count)
3678 XSRETURN_YES;
3679
3680 XSRETURN_NO;
3681}
3682
3683MODULE = Coro::State PACKAGE = Coro::Signal
3684
3685SV *
3686new (SV *klass)
3687 CODE:
3688 RETVAL = sv_bless (
3689 coro_waitarray_new (aTHX_ 0),
3690 GvSTASH (CvGV (cv))
3691 );
3692 OUTPUT:
3693 RETVAL
3694
3695void
3696wait (...)
3697 CODE:
3698 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3699
3700void
3701broadcast (SV *self)
3702 CODE:
3703{
3704 AV *av = (AV *)SvRV (self);
3705 coro_signal_wake (aTHX_ av, AvFILLp (av));
3706}
3707
3708void
3709send (SV *self)
3710 CODE:
3711{
3712 AV *av = (AV *)SvRV (self);
3713
3714 if (AvFILLp (av))
3715 coro_signal_wake (aTHX_ av, 1);
3716 else
3717 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3718}
3719
3720IV
3721awaited (SV *self)
3722 CODE:
3723 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3724 OUTPUT:
3725 RETVAL
3726
3727
3728MODULE = Coro::State PACKAGE = Coro::AnyEvent
3729
3730BOOT:
3731 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3732
3733void
3734_schedule (...)
3735 CODE:
3736{
3737 static int incede;
3738
1087 api_cede (); 3739 api_cede_notself (aTHX);
1088 3740
3741 ++incede;
3742 while (coro_nready >= incede && api_cede (aTHX))
3743 ;
3744
3745 sv_setsv (sv_activity, &PL_sv_undef);
3746 if (coro_nready >= incede)
3747 {
3748 PUSHMARK (SP);
3749 PUTBACK;
3750 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3751 }
3752
3753 --incede;
3754}
3755
3756
3757MODULE = Coro::State PACKAGE = Coro::AIO
3758
3759void
3760_register (char *target, char *proto, SV *req)
3761 CODE:
3762{
3763 SV *req_cv = s_get_cv_croak (req);
3764 /* newXSproto doesn't return the CV on 5.8 */
3765 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3766 sv_setpv ((SV *)slf_cv, proto);
3767 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3768}
3769
3770MODULE = Coro::State PACKAGE = Coro::Select
3771
3772void
3773patch_pp_sselect ()
3774 CODE:
3775 if (!coro_old_pp_sselect)
3776 {
3777 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3778 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3779 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3780 }
3781
3782void
3783unpatch_pp_sselect ()
3784 CODE:
3785 if (coro_old_pp_sselect)
3786 {
3787 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3788 coro_old_pp_sselect = 0;
3789 }
3790
3791

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines