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Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
12
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, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
8 55
9#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
31# ifndef IS_PADCONST 78# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
33# endif 80# endif
34#endif 81#endif
35 82
36#include <stdio.h> 83/* 5.11 */
37#include <errno.h> 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
38 105
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD 107# undef CORO_STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h>
49# include <sys/mman.h>
50# ifndef MAP_ANONYMOUS
51# ifdef MAP_ANON
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif
56# endif 108#endif
57# include <limits.h> 109
58# ifndef PAGESIZE 110#ifndef CORO_STACKGUARD
59# define PAGESIZE pagesize 111# define CORO_STACKGUARD 0
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize;
62# else
63# define BOOT_PAGESIZE
64# endif 112#endif
65#endif
66 113
67/* The next macro should declare a variable stacklevel that contains and approximation 114/* prefer perl internal functions over our own? */
68 * to the current C stack pointer. Its property is that it changes with each call 115#ifndef CORO_PREFER_PERL_FUNCTIONS
69 * and should be unique. */ 116# define CORO_PREFER_PERL_FUNCTIONS 0
70#define dSTACKLEVEL int stacklevel 117#endif
71#define STACKLEVEL ((void *)&stacklevel) 118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
72 126
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
74 128
75#if __GNUC__ >= 3 129#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
77#else 133#else
78# define attribute(x) 134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
79#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
80 141
81#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
82 143
83#include "CoroAPI.h" 144#include "CoroAPI.h"
84 145
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86
87#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
88static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
91#else 155#else
156
92# define LOCK (void)0 157# define LOCK (void)0
93# define UNLOCK (void)0 158# define UNLOCK (void)0
94#endif
95 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
100 213
101/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 215typedef struct coro_cctx
216{
103 struct coro_stack *next; 217 struct coro_cctx *next;
104 218
105 /* the stack */ 219 /* the stack */
106 void *sptr; 220 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 221 size_t ssize;
108 222
109 /* cpu state */ 223 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 226 JMPENV *top_env;
112 coro_context cctx; 227 coro_context cctx;
113} coro_stack; 228
229 U32 gen;
230#if CORO_USE_VALGRIND
231 int valgrind_id;
232#endif
233 unsigned char flags;
234} coro_cctx;
235
236enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
242
243/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct
245{
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 256
115/* this is a structure representing a perl-level coroutine */ 257/* this is a structure representing a perl-level coroutine */
116struct coro { 258struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 259 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 260 coro_cctx *cctx;
119 261
120 /* data associated with this coroutine (initial args) */ 262 /* process data */
121 AV *args; 263 struct CoroSLF slf_frame; /* saved slf frame */
122 int refcnt;
123
124 /* optionally saved, might be zero */
125 AV *defav;
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 264 AV *mainstack;
137 SV **stack_sp; 265 perl_slots *slot; /* basically the saved sp */
138 OP *op; 266
139 SV **curpad; 267 AV *args; /* data associated with this coroutine (initial args) */
140 AV *comppad; 268 int refcnt; /* coroutines are refcounted, yes */
141 CV *compcv; 269 int flags; /* CF_ flags */
142 SV **stack_base; 270 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 271
144 SV **tmps_stack; 272 /* statistics */
145 I32 tmps_floor; 273 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 274
163 /* coro process data */ 275 /* coro process data */
164 int prio; 276 int prio;
277 SV *throw; /* exception to be thrown */
278
279 /* async_pool */
280 SV *saved_deffh;
281
282 /* linked list */
283 struct coro *next, *prev;
165}; 284};
166 285
167typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
169 288
289static struct CoroSLF slf_frame; /* the current slf frame */
290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
170static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
171coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
172{ 341{
173 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
175 344
176 newpadlist = newAV (); 345 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 349#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 351#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 353 --AvFILLp (padlist);
185 354
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
187 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
188 357
189 return newpadlist; 358 return newpadlist;
190} 359}
191 360
192static void 361static void
193free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
194{ 363{
195 /* may be during global destruction */ 364 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
197 { 366 {
198 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
219 AV *padlist; 388 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
221 390
222 /* casting is fun. */ 391 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
225 394
226 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 396
228 return 0; 397 return 0;
229} 398}
230 399
231#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
232 402
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234 443
235/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
236static void 445static void
237get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
238{ 447{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
240 450
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 453 else
244 { 454 {
245#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
251#else 462#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 464#endif
254 } 465 }
255} 466}
256 467
257static void 468static void
258put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
259{ 470{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
261 473
262 if (!mg) 474 if (expect_false (!mg))
263 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 }
269 476
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
271}
272 478
273#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
275 481
276#define LOAD(state) load_state((state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277#define SAVE(state,flags) save_state((state),(flags)); 483}
278 484
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
280 486
281static void 487static void
282load_state(Coro__State c) 488load_perl (pTHX_ Coro__State c)
283{ 489{
284 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 491 c->slot = 0;
286 492
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
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#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 494
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
321 503
322 { 504 {
323 dSP; 505 dSP;
506
324 CV *cv; 507 CV *cv;
325 508
326 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
328 { 511 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
335 } 514 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 515 }
339 516
340 PUTBACK; 517 PUTBACK;
341 } 518 }
342}
343 519
520 slf_frame = c->slf_frame;
521}
522
344static void 523static void
345save_state(Coro__State c, int flags) 524save_perl (pTHX_ Coro__State c)
346{ 525{
526 c->slf_frame = slf_frame;
527
347 { 528 {
348 dSP; 529 dSP;
349 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 534 /*
354 * the worst thing you can imagine happens first - we have to save 535 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
356 */ 537 */
357 538
358 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
360 for (;;) 541 for (;;)
361 { 542 {
362 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
363 { 544 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
365 546
366 if (CxTYPE(cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367 { 548 {
368 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
550
369 if (CvDEPTH(cv)) 551 if (expect_true (CvDEPTH (cv)))
370 { 552 {
371 EXTEND (SP, CvDEPTH(cv)*2); 553 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
382 557
558 CvDEPTH (cv) = 0;
383 get_padlist (cv); 559 get_padlist (aTHX_ cv);
384 } 560 }
385 } 561 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 562 }
395 563
396 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 565 break;
398 566
399 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
402 } 570 }
403 571
404 PUTBACK; 572 PUTBACK;
405 } 573 }
406 574
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
410 586
411 c->dowarn = PL_dowarn;
412 c->in_eval = PL_in_eval;
413
414 c->curstackinfo = PL_curstackinfo;
415 c->curstack = PL_curstack;
416 c->mainstack = PL_mainstack; 587 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 588
418 c->op = PL_op; 589 {
419 c->curpad = PL_curpad; 590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 591
421 c->compcv = PL_compcv; 592 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 593 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 594 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 595 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 596
426 c->tmps_ix = PL_tmps_ix; 597 #define VAR(name,type) slot->name = PL_ ## name;
427 c->tmps_max = PL_tmps_max; 598 # include "state.h"
428 c->markstack = PL_markstack; 599 #undef VAR
429 c->markstack_ptr = PL_markstack_ptr; 600 }
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 601}
445 602
446/* 603/*
447 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
451 */ 608 */
609#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks
611#else
452static void 612static void
453coro_init_stacks () 613coro_init_stacks (pTHX)
454{ 614{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 615 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 619
460 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 623
464 New(50,PL_tmps_stack,96,SV*); 624 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 627 PL_tmps_max = 32;
468 628
469 New(54,PL_markstack,16,I32); 629 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 631 PL_markstack_max = PL_markstack + 16;
472 632
473#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
475#endif 635#endif
476 636
477 New(54,PL_scopestack,16,I32); 637 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 639 PL_scopestack_max = 8;
480 640
481 New(54,PL_savestack,96,ANY); 641 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 643 PL_savestack_max = 24;
484 644
485#if !PERL_VERSION_ATLEAST (5,9,0) 645#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 646 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 648 PL_retstack_max = 4;
489#endif 649#endif
490} 650}
651#endif
491 652
492/* 653/*
493 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
494 */ 655 */
495static void 656static void
496destroy_stacks() 657coro_destruct_stacks (pTHX)
497{ 658{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
511 661
512 while (PL_curstackinfo) 662 while (PL_curstackinfo)
513 { 663 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 664 PERL_SI *p = PL_curstackinfo->si_prev;
515 665
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 666 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 667 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 668
528 Safefree (PL_curstackinfo->si_cxstack); 669 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 670 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 671 PL_curstackinfo = p;
531 } 672 }
532 673
533 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 675 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 677 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 678#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 679 Safefree (PL_retstack);
539#endif 680#endif
540} 681}
541 682
683static size_t
684coro_rss (pTHX_ struct coro *coro)
685{
686 size_t rss = sizeof (*coro);
687
688 if (coro->mainstack)
689 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING)
694 {
695 slot = &tmp_slot;
696
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
700 }
701 else
702 slot = coro->slot;
703
704 if (slot)
705 {
706 rss += sizeof (slot->curstackinfo);
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 }
718 }
719
720 return rss;
721}
722
723/** coroutine stack handling ************************************************/
724
725static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
727static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
728
729/* apparently < 5.8.8 */
730#ifndef MgPV_nolen_const
731#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
732 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
733 (const char*)(mg)->mg_ptr)
734#endif
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
542static void 745static int
543setup_coro (struct coro *coro) 746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816prepare_nop (pTHX_ struct coro_transfer_args *ta)
817{
818 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta;
820}
821
822static int
823slf_check_nop (pTHX_ struct CoroSLF *frame)
824{
825 return 0;
826}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
544{ 830{
545 /* 831 /*
546 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
547 */ 833 */
548 dTHX; 834 coro_init_stacks (aTHX);
835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882
883static void
884coro_destruct (pTHX_ struct coro *coro)
885{
886 if (!IN_DESTRUCT)
887 {
888 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0);
890 assert (PL_tmps_floor == -1);
891
892 /* free all temporaries */
893 FREETMPS;
894 assert (PL_tmps_ix == -1);
895
896 /* unwind all extra stacks */
897 POPSTACK_TO (PL_mainstack);
898
899 /* unwind main stack */
900 dounwind (-1);
901 }
902
903 SvREFCNT_dec (GvSV (PL_defgv));
904 SvREFCNT_dec (GvAV (PL_defgv));
905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
915
916 coro_destruct_stacks (aTHX);
917}
918
919INLINE void
920free_coro_mortal (pTHX)
921{
922 if (expect_true (coro_mortal))
923 {
924 SvREFCNT_dec (coro_mortal);
925 coro_mortal = 0;
926 }
927}
928
929static int
930runops_trace (pTHX)
931{
932 COP *oldcop = 0;
933 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 {
939 PERL_ASYNC_CHECK ();
940
941 if (cctx->flags & CC_TRACE_ALL)
942 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
944 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top;
947 AV *av = newAV (); /* return values */
948 SV **cb;
949 dSP;
950
951 GV *gv = CvGV (cx->blk_sub.cv);
952 SV *fullname = sv_2mortal (newSV (0));
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 bot = PL_stack_base + cx->blk_oldsp + 1;
957 top = cx->blk_gimme == G_ARRAY ? SP + 1
958 : cx->blk_gimme == G_SCALAR ? bot + 1
959 : bot;
960
961 av_extend (av, top - bot);
962 while (bot < top)
963 av_push (av, SvREFCNT_inc_NN (*bot++));
964
965 PL_runops = RUNOPS_DEFAULT;
966 ENTER;
967 SAVETMPS;
968 EXTEND (SP, 3);
969 PUSHMARK (SP);
970 PUSHs (&PL_sv_no);
971 PUSHs (fullname);
972 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
973 PUTBACK;
974 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
975 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
976 SPAGAIN;
977 FREETMPS;
978 LEAVE;
979 PL_runops = runops_trace;
980 }
981
982 if (oldcop != PL_curcop)
983 {
984 oldcop = PL_curcop;
985
986 if (PL_curcop != &PL_compiling)
987 {
988 SV **cb;
989
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
991 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 {
996 runops_proc_t old_runops = PL_runops;
997 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0));
1000
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 ENTER;
1006 SAVETMPS;
1007 EXTEND (SP, 3);
1008 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN;
1016 FREETMPS;
1017 LEAVE;
1018 PL_runops = runops_trace;
1019 }
1020
1021 oldcxix = cxstack_ix;
1022 }
1023
1024 if (cctx->flags & CC_TRACE_LINE)
1025 {
1026 dSP;
1027
1028 PL_runops = RUNOPS_DEFAULT;
1029 ENTER;
1030 SAVETMPS;
1031 EXTEND (SP, 3);
1032 PL_runops = RUNOPS_DEFAULT;
1033 PUSHMARK (SP);
1034 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1035 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
1043 }
1044 }
1045 }
1046 }
1047 }
1048
1049 TAINT_NOT;
1050 return 0;
1051}
1052
1053static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
1064static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx)
1066{
549 dSP; 1067 dSP;
550 UNOP myop; 1068 UNOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1069
553 coro_init_stacks (); 1070 PL_top_env = &PL_start_env;
554 /*PL_curcop = 0;*/
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1071
559 SPAGAIN; 1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
560 1074
561 Zero (&myop, 1, UNOP); 1075 Zero (&myop, 1, UNOP);
562 myop.op_next = Nullop; 1076 myop.op_next = PL_op;
563 myop.op_flags = OPf_WANT_VOID; 1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564 1078
1079 PUSHMARK (SP);
1080 EXTEND (SP, 2);
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1083 PUTBACK;
565 PL_op = (OP *)&myop; 1084 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571 SPAGAIN; 1086 SPAGAIN;
572
573 ENTER; /* necessary e.g. for dounwind */
574} 1087}
575 1088
576static void 1089/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void
1091transfer_tail (pTHX)
1092{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
577free_coro_mortal () 1097 free_coro_mortal (aTHX);
578{ 1098 UNLOCK;
579 if (coro_mortal) 1099
580 { 1100 if (expect_false (next->throw))
581 SvREFCNT_dec (coro_mortal);
582 coro_mortal = 0;
583 } 1101 {
584} 1102 SV *exception = sv_2mortal (next->throw);
585 1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX);
1134
1135 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op;
1137 perl_run (PL_curinterp);
1138
1139 /*
1140 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept
1145 */
1146 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
1149}
1150
1151static coro_cctx *
1152cctx_new ()
1153{
1154 coro_cctx *cctx;
1155
1156 ++cctx_count;
1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
1185
1186#if HAVE_MMAP
1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1188 /* mmap supposedly does allocate-on-write for us */
1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1190
1191 if (cctx->sptr != (void *)-1)
1192 {
1193 #if CORO_STACKGUARD
1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1195 #endif
1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1198 cctx->flags |= CC_MAPPED;
1199 }
1200 else
1201#endif
1202 {
1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1204 New (0, cctx->sptr, cctx_stacksize, long);
1205
1206 if (!cctx->sptr)
1207 {
1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1209 _exit (EXIT_FAILURE);
1210 }
1211
1212 stack_start = cctx->sptr;
1213 stack_size = cctx->ssize;
1214 }
1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1218 #endif
1219
1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1221
1222 return cctx;
1223}
1224
1225static void
1226cctx_destroy (coro_cctx *cctx)
1227{
1228 if (!cctx)
1229 return;
1230
1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
1233
1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1239 #endif
1240
1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
1243 munmap (cctx->sptr, cctx->ssize);
1244 else
1245#endif
1246 Safefree (cctx->sptr);
1247 }
1248
1249 Safefree (cctx);
1250}
1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
1255static coro_cctx *
1256cctx_get (pTHX)
1257{
1258 while (expect_true (cctx_first))
1259 {
1260 coro_cctx *cctx = cctx_first;
1261 cctx_first = cctx->next;
1262 --cctx_idle;
1263
1264 if (expect_true (!CCTX_EXPIRED (cctx)))
1265 return cctx;
1266
1267 cctx_destroy (cctx);
1268 }
1269
1270 return cctx_new_run ();
1271}
1272
1273static void
1274cctx_put (coro_cctx *cctx)
1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
1278 /* free another cctx if overlimit */
1279 if (expect_false (cctx_idle >= cctx_max_idle))
1280 {
1281 coro_cctx *first = cctx_first;
1282 cctx_first = first->next;
1283 --cctx_idle;
1284
1285 cctx_destroy (first);
1286 }
1287
1288 ++cctx_idle;
1289 cctx->next = cctx_first;
1290 cctx_first = cctx;
1291}
1292
1293/** coroutine switching *****************************************************/
1294
1295static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{
1298 if (expect_true (prev != next))
1299 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
1313 }
1314}
1315
1316/* always use the TRANSFER macro */
586static void NOINLINE 1317static void NOINLINE
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return;
669
670#if HAVE_MMAP
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675
676 Safefree (stack);
677}
678
679static coro_stack *stack_first;
680
681static coro_stack *
682stack_get ()
683{
684 coro_stack *stack;
685
686 if (stack_first)
687 {
688 stack = stack_first;
689 stack_first = stack->next;
690 }
691 else
692 {
693 stack = stack_new ();
694 PL_op = PL_op->op_next;
695 }
696
697 return stack;
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags) 1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
710{ 1319{
711 dSTACKLEVEL; 1320 dSTACKLEVEL;
712 1321
713 /* sometimes transfer is only called to set idle_sp */ 1322 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL) 1323 if (expect_false (!next))
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1324 {
716 else if (prev != next) 1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
717 { 1327 }
1328 else if (expect_true (prev != next))
1329 {
718 coro_stack *prev__stack; 1330 coro_cctx *prev__cctx;
1331
1332 if (expect_false (prev->flags & CF_NEW))
1333 {
1334 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING;
1338 }
1339
1340 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING;
719 1342
720 LOCK; 1343 LOCK;
721 1344
722 if (next->mainstack) 1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
1348 if (expect_false (next->flags & CF_NEW))
723 { 1349 {
724 /* coroutine already started */ 1350 /* need to start coroutine */
725 SAVE (prev, flags); 1351 next->flags &= ~CF_NEW;
726 LOAD (next); 1352 /* setup coroutine call */
1353 coro_setup (aTHX_ next);
727 } 1354 }
728 else 1355 else
1356 load_perl (aTHX_ next);
1357
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */
1361 if (expect_true (
1362 prev__cctx->idle_sp == (void *)stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
729 { 1366 {
730 /* need to start coroutine */ 1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
731 /* first get rid of the old state */ 1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
732 SAVE (prev, -1); 1369
733 /* setup coroutine call */ 1370 prev->cctx = 0;
734 setup_coro (next); 1371
735 /* need a stack */ 1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
736 next->stack = 0; 1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1376 next->cctx = cctx_get (aTHX);
1377
1378 cctx_put (prev__cctx);
737 } 1379 }
738 1380
739 if (!prev->stack) 1381 ++next->usecount;
740 /* create a new empty context */
741 Newz (0, prev->stack, 1, coro_stack);
742 1382
743 prev__stack = prev->stack; 1383 if (expect_true (!next->cctx))
1384 next->cctx = cctx_get (aTHX);
744 1385
745 /* possibly "free" the stack */ 1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
746 if (prev__stack->idle_sp == STACKLEVEL) 1387 transfer_next = next;
1388
1389 if (expect_false (prev__cctx != next->cctx))
747 { 1390 {
748 stack_put (prev__stack); 1391 prev__cctx->top_env = PL_top_env;
749 prev->stack = 0; 1392 PL_top_env = next->cctx->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
750 } 1394 }
751 1395
752 if (!next->stack) 1396 transfer_tail (aTHX);
753 next->stack = stack_get (); 1397 }
1398}
754 1399
755 if (prev__stack != next->stack) 1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
756 { 1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
757 prev__stack->top_env = PL_top_env;
758 PL_top_env = next->stack->top_env;
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
760 }
761 1402
762 free_coro_mortal (); 1403/** high level stuff ********************************************************/
763 1404
1405static int
1406coro_state_destroy (pTHX_ struct coro *coro)
1407{
1408 if (coro->flags & CF_DESTROYED)
1409 return 0;
1410
1411 coro->flags |= CF_DESTROYED;
1412
1413 if (coro->flags & CF_READY)
1414 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready;
764 UNLOCK; 1419 UNLOCK;
765 } 1420 }
766} 1421 else
767 1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781 1423
782 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 1425 {
784 struct coro temp; 1426 struct coro temp;
785 1427
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
787 LOAD (coro);
788 1429
789 destroy_stacks (); 1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro);
790 1432
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1433 coro_destruct (aTHX_ coro);
792 1434
1435 load_perl (aTHX_ &temp);
1436
793 coro->mainstack = 0; 1437 coro->slot = 0;
794 } 1438 }
795 1439
796 stack_free (coro->stack); 1440 cctx_destroy (coro->cctx);
797 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
798 Safefree (coro); 1442
1443 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next;
1446
1447 return 1;
799} 1448}
800 1449
801static int 1450static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803{ 1452{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1453 struct coro *coro = (struct coro *)mg->mg_ptr;
805 mg->mg_ptr = 0; 1454 mg->mg_ptr = 0;
806 1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
807 coro_state_destroy (coro); 1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
808 1463
809 return 0; 1464 return 0;
810} 1465}
811 1466
812static int 1467static int
… …
819 return 0; 1474 return 0;
820} 1475}
821 1476
822static MGVTBL coro_state_vtbl = { 1477static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0, 1478 0, 0, 0, 0,
824 coro_state_clear, 1479 coro_state_free,
825 0, 1480 0,
826#ifdef MGf_DUP 1481#ifdef MGf_DUP
827 coro_state_dup, 1482 coro_state_dup,
1483#else
1484# define MGf_DUP 0
828#endif 1485#endif
829}; 1486};
830 1487
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void 1488static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1490{
856 ta->prev = SvSTATE (prev); 1491 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1492 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1493 TRANSFER_CHECK (*ta);
859} 1494}
860 1495
861static void 1496static void
862api_transfer (SV *prev, SV *next, int flags) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
863{ 1498{
864 dTHX;
865 struct transfer_args ta; 1499 struct coro_transfer_args ta;
866 1500
867 prepare_transfer (&ta, prev, next, flags); 1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868 TRANSFER (ta); 1502 TRANSFER (ta, 1);
869} 1503}
870 1504
871/** Coro ********************************************************************/ 1505/** Coro ********************************************************************/
872 1506
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 1507static void
886coro_enq (SV *sv) 1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
887{ 1515{
888 int prio; 1516 int prio;
889 1517
890 if (SvTYPE (sv) != SVt_PVHV) 1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
892 1521
893 prio = SvSTATE (sv)->prio; 1522 return 0;
1523}
894 1524
895 av_push (coro_ready [prio - PRIO_MIN], sv); 1525static int
1526api_ready (pTHX_ SV *coro_sv)
1527{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv);
1536
1537 if (coro->flags & CF_READY)
1538 return 0;
1539
1540 coro->flags |= CF_READY;
1541
1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
896 coro_nready++; 1548 ++coro_nready;
1549
1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570
1571 return 1;
1572}
1573
1574static int
1575api_is_ready (pTHX_ SV *coro_sv)
1576{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578}
1579
1580INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1582{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1633 LOCK;
1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1636 UNLOCK;
1637}
1638
1639INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{
1642 api_ready (aTHX_ coro_current);
1643 prepare_schedule (aTHX_ ta);
1644}
1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
1655 }
1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1667}
1668
1669static int
1670api_cede (pTHX)
1671{
1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static int
1686api_cede_notself (pTHX)
1687{
1688 if (coro_nready)
1689 {
1690 struct coro_transfer_args ta;
1691
1692 prepare_cede_notself (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694 return 1;
1695 }
1696 else
1697 return 0;
1698}
1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
1725/*****************************************************************************/
1726/* PerlIO::cede */
1727
1728typedef struct
1729{
1730 PerlIOBuf base;
1731 NV next, every;
1732} PerlIOCede;
1733
1734static IV
1735PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1736{
1737 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1738
1739 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1740 self->next = nvtime () + self->every;
1741
1742 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
897} 1743}
898 1744
899static SV * 1745static SV *
900coro_deq (int min_prio) 1746PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
901{ 1747{
902 int prio = PRIO_MAX - PRIO_MIN; 1748 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
903 1749
904 min_prio -= PRIO_MIN; 1750 return newSVnv (self->every);
905 if (min_prio < 0) 1751}
906 min_prio = 0;
907 1752
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1753static IV
909 if (AvFILLp (coro_ready [prio]) >= 0) 1754PerlIOCede_flush (pTHX_ PerlIO *f)
1755{
1756 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757 double now = nvtime ();
1758
1759 if (now >= self->next)
1760 {
1761 api_cede (aTHX);
1762 self->next = now + self->every;
1763 }
1764
1765 return PerlIOBuf_flush (aTHX_ f);
1766}
1767
1768static PerlIO_funcs PerlIO_cede =
1769{
1770 sizeof(PerlIO_funcs),
1771 "cede",
1772 sizeof(PerlIOCede),
1773 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1774 PerlIOCede_pushed,
1775 PerlIOBuf_popped,
1776 PerlIOBuf_open,
1777 PerlIOBase_binmode,
1778 PerlIOCede_getarg,
1779 PerlIOBase_fileno,
1780 PerlIOBuf_dup,
1781 PerlIOBuf_read,
1782 PerlIOBuf_unread,
1783 PerlIOBuf_write,
1784 PerlIOBuf_seek,
1785 PerlIOBuf_tell,
1786 PerlIOBuf_close,
1787 PerlIOCede_flush,
1788 PerlIOBuf_fill,
1789 PerlIOBase_eof,
1790 PerlIOBase_error,
1791 PerlIOBase_clearerr,
1792 PerlIOBase_setlinebuf,
1793 PerlIOBuf_get_base,
1794 PerlIOBuf_bufsiz,
1795 PerlIOBuf_get_ptr,
1796 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt,
1798};
1799
1800/*****************************************************************************/
1801
1802static const CV *slf_cv; /* for quick consistency check */
1803
1804static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1805static SV *slf_arg0;
1806static SV *slf_arg1;
1807static SV *slf_arg2;
1808
1809/* this restores the stack in the case we patched the entersub, to */
1810/* recreate the stack frame as perl will on following calls */
1811/* since entersub cleared the stack */
1812static OP *
1813pp_restore (pTHX)
1814{
1815 dSP;
1816
1817 PUSHMARK (SP);
1818
1819 EXTEND (SP, 3);
1820 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1821 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1822 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1823 PUSHs ((SV *)CvGV (slf_cv));
1824
1825 RETURNOP (slf_restore.op_first);
1826}
1827
1828static void
1829slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1830{
1831 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1832}
1833
1834static void
1835slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1836{
1837 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1838
1839 frame->prepare = slf_prepare_set_stacklevel;
1840 frame->check = slf_check_nop;
1841 frame->data = (void *)SvIV (arg [0]);
1842}
1843
1844static void
1845slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1846{
1847 SV **arg = (SV **)slf_frame.data;
1848
1849 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1850}
1851
1852static void
1853slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1854{
1855 if (items != 2)
1856 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1857
1858 frame->prepare = slf_prepare_transfer;
1859 frame->check = slf_check_nop;
1860 frame->data = (void *)arg; /* let's hope it will stay valid */
1861}
1862
1863static void
1864slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1865{
1866 frame->prepare = prepare_schedule;
1867 frame->check = slf_check_nop;
1868}
1869
1870static void
1871slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1872{
1873 frame->prepare = prepare_cede;
1874 frame->check = slf_check_nop;
1875}
1876
1877static void
1878slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1879{
1880 frame->prepare = prepare_cede_notself;
1881 frame->check = slf_check_nop;
1882}
1883
1884/* we hijack an hopefully unused CV flag for our purposes */
1885#define CVf_SLF 0x4000
1886
1887/*
1888 * these not obviously related functions are all rolled into one
1889 * function to increase chances that they all will call transfer with the same
1890 * stack offset
1891 * SLF stands for "schedule-like-function".
1892 */
1893static OP *
1894pp_slf (pTHX)
1895{
1896 I32 checkmark; /* mark SP to see how many elements check has pushed */
1897
1898 /* set up the slf frame, unless it has already been set-up */
1899 /* the latter happens when a new coro has been started */
1900 /* or when a new cctx was attached to an existing coroutine */
1901 if (expect_true (!slf_frame.prepare))
1902 {
1903 /* first iteration */
1904 dSP;
1905 SV **arg = PL_stack_base + TOPMARK + 1;
1906 int items = SP - arg; /* args without function object */
1907 SV *gv = *sp;
1908
1909 /* do a quick consistency check on the "function" object, and if it isn't */
1910 /* for us, divert to the real entersub */
1911 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1912 return PL_ppaddr[OP_ENTERSUB](aTHX);
1913
1914 /* pop args */
1915 SP = PL_stack_base + POPMARK;
1916
1917 if (!(PL_op->op_flags & OPf_STACKED))
1918 {
1919 /* ampersand-form of call, use @_ instead of stack */
1920 AV *av = GvAV (PL_defgv);
1921 arg = AvARRAY (av);
1922 items = AvFILLp (av) + 1;
1923 }
1924
1925 PUTBACK;
1926
1927 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, GvCV (gv), arg, items);
1928 }
1929
1930 /* now interpret the slf_frame */
1931 /* we use a callback system not to make the code needlessly */
1932 /* complicated, but so we can run multiple perl coros from one cctx */
1933
1934 do
1935 {
1936 struct coro_transfer_args ta;
1937
1938 slf_frame.prepare (aTHX_ &ta);
1939 TRANSFER (ta, 0);
1940
1941 checkmark = PL_stack_sp - PL_stack_base;
1942 }
1943 while (slf_frame.check (aTHX_ &slf_frame));
1944
1945 {
1946 dSP;
1947 SV **bot = PL_stack_base + checkmark;
1948 int gimme = GIMME_V;
1949
1950 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1951
1952 /* make sure we put something on the stack in scalar context */
1953 if (gimme == G_SCALAR)
910 { 1954 {
911 coro_nready--; 1955 if (sp == bot)
912 return av_shift (coro_ready [prio]); 1956 XPUSHs (&PL_sv_undef);
1957
1958 SP = bot + 1;
913 } 1959 }
914 1960
915 return 0;
916}
917
918static void
919api_ready (SV *coro)
920{
921 dTHX;
922
923 if (SvROK (coro))
924 coro = SvRV (coro);
925
926 LOCK;
927 coro_enq (SvREFCNT_inc (coro));
928 UNLOCK;
929}
930
931static void
932prepare_schedule (struct transfer_args *ta)
933{
934 SV *current, *prev, *next;
935
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946
947 {
948 dSP;
949
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK; 1961 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD); 1962 }
956 1963
957 FREETMPS; 1964 return NORMAL;
958 LEAVE; 1965}
1966
1967static void
1968api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1969{
1970 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1971
1972 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1973 && PL_op->op_ppaddr != pp_slf)
1974 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1975
1976 if (items > 3)
1977 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1978
1979 CvFLAGS (cv) |= CVf_SLF;
1980 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981 slf_cv = cv;
1982
1983 /* we patch the op, and then re-run the whole call */
1984 /* we have to put the same argument on the stack for this to work */
1985 /* and this will be done by pp_restore */
1986 slf_restore.op_next = (OP *)&slf_restore;
1987 slf_restore.op_type = OP_NULL;
1988 slf_restore.op_ppaddr = pp_restore;
1989 slf_restore.op_first = PL_op;
1990
1991 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1992 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1993 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1994
1995 PL_op->op_ppaddr = pp_slf;
1996
1997 PL_op = (OP *)&slf_restore;
1998}
1999
2000/*****************************************************************************/
2001
2002static int
2003slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2004{
2005 AV *av = (AV *)frame->data;
2006 SV *count_sv = AvARRAY (av)[0];
2007
2008 if (SvIVX (count_sv) > 0)
2009 {
2010 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2011 return 0;
959 } 2012 }
2013 else
960 } 2014 {
2015 int i;
2016 /* if we were woken up but can't down, we look through the whole */
2017 /* waiters list and only add us if we aren't in there already */
2018 /* this avoids some degenerate memory usage cases */
961 2019
962 prev = SvRV (current); 2020 for (i = 1; i <= AvFILLp (av); ++i)
963 SvRV (current) = next; 2021 if (AvARRAY (av)[i] == SvRV (coro_current))
2022 return 1;
964 2023
965 /* free this only after the transfer */ 2024 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
966 LOCK; 2025 return 1;
967 free_coro_mortal (); 2026 }
968 UNLOCK;
969 coro_mortal = prev;
970
971 ta->prev = SvSTATE (prev);
972 ta->next = SvSTATE (next);
973 ta->flags = TRANSFER_SAVE_ALL;
974} 2027}
975 2028
976static void 2029static void
977prepare_cede (struct transfer_args *ta) 2030slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
978{ 2031{
979 LOCK; 2032 AV *av = (AV *)SvRV (arg [0]);
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982 2033
983 prepare_schedule (ta); 2034 if (SvIVX (AvARRAY (av)[0]) > 0)
984} 2035 {
2036 frame->data = (void *)av;
2037 frame->prepare = prepare_nop;
2038 }
2039 else
2040 {
2041 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
985 2042
986static void 2043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
987api_schedule (void) 2044 frame->prepare = prepare_schedule;
988{ 2045 }
989 dTHX;
990 struct transfer_args ta;
991 2046
992 prepare_schedule (&ta); 2047 frame->check = slf_check_semaphore_down;
993 TRANSFER (ta);
994}
995 2048
996static void
997api_cede (void)
998{
999 dTHX;
1000 struct transfer_args ta;
1001
1002 prepare_cede (&ta);
1003 TRANSFER (ta);
1004} 2049}
1005 2050
2051/*****************************************************************************/
2052
2053#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2054
2055/* create a closure from XS, returns a code reference */
2056/* the arg can be accessed via GENSUB_ARG from the callback */
2057/* the callback must use dXSARGS/XSRETURN */
2058static SV *
2059gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2060{
2061 CV *cv = (CV *)NEWSV (0, 0);
2062
2063 sv_upgrade ((SV *)cv, SVt_PVCV);
2064
2065 CvANON_on (cv);
2066 CvISXSUB_on (cv);
2067 CvXSUB (cv) = xsub;
2068 GENSUB_ARG = arg;
2069
2070 return newRV_noinc ((SV *)cv);
2071}
2072
2073/*****************************************************************************/
2074
1006MODULE = Coro::State PACKAGE = Coro::State 2075MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 2076
1008PROTOTYPES: DISABLE 2077PROTOTYPES: DISABLE
1009 2078
1010BOOT: 2079BOOT:
1011{ 2080{
1012#ifdef USE_ITHREADS 2081#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 2082 MUTEX_INIT (&coro_lock);
2083# if CORO_PTHREAD
2084 coro_thx = PERL_GET_CONTEXT;
2085# endif
1014#endif 2086#endif
1015 BOOT_PAGESIZE; 2087 BOOT_PAGESIZE;
1016 2088
2089 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2090 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2091
2092 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2093 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2094 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2095
2096 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2097 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2098 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2099
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2100 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 2101
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2102 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2103 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2104 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2105 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 2106
1023 main_mainstack = PL_mainstack; 2107 main_mainstack = PL_mainstack;
2108 main_top_env = PL_top_env;
1024 2109
2110 while (main_top_env->je_prev)
2111 main_top_env = main_top_env->je_prev;
2112
1025 coroapi.ver = CORO_API_VERSION; 2113 coroapi.ver = CORO_API_VERSION;
2114 coroapi.rev = CORO_API_REVISION;
2115
1026 coroapi.transfer = api_transfer; 2116 coroapi.transfer = api_transfer;
2117
2118 coroapi.sv_state = SvSTATE_;
2119 coroapi.execute_slf = api_execute_slf;
2120 coroapi.prepare_nop = prepare_nop;
2121 coroapi.prepare_schedule = prepare_schedule;
2122 coroapi.prepare_cede = prepare_cede;
2123 coroapi.prepare_cede_notself = prepare_cede_notself;
2124
2125 {
2126 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2127
2128 if (!svp) croak ("Time::HiRes is required");
2129 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2130
2131 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2132 }
1027 2133
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2134 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1029} 2135}
1030 2136
1031SV * 2137SV *
1032new (char *klass, ...) 2138new (char *klass, ...)
1033 CODE: 2139 CODE:
1034{ 2140{
1035 struct coro *coro; 2141 struct coro *coro;
2142 MAGIC *mg;
1036 HV *hv; 2143 HV *hv;
1037 int i; 2144 int i;
1038 2145
1039 Newz (0, coro, 1, struct coro); 2146 Newz (0, coro, 1, struct coro);
1040 coro->args = newAV (); 2147 coro->args = newAV ();
2148 coro->flags = CF_NEW;
1041 2149
2150 if (coro_first) coro_first->prev = coro;
2151 coro->next = coro_first;
2152 coro_first = coro;
2153
1042 hv = newHV (); 2154 coro->hv = hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2155 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2156 mg->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2157 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045 2158
2159 av_extend (coro->args, items - 1);
1046 for (i = 1; i < items; i++) 2160 for (i = 1; i < items; i++)
1047 av_push (coro->args, newSVsv (ST (i))); 2161 av_push (coro->args, newSVsv (ST (i)));
1048
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1050 /*coro->stack = 0;*/
1051} 2162}
1052 OUTPUT: 2163 OUTPUT:
1053 RETVAL 2164 RETVAL
1054 2165
1055void 2166void
1056_set_stacklevel (...) 2167_set_stacklevel (...)
1057 ALIAS: 2168 CODE:
1058 Coro::State::transfer = 1 2169 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1059 Coro::schedule = 2
1060 Coro::cede = 3
1061 Coro::Cont::yield = 4
1062 CODE:
1063{
1064 struct transfer_args ta;
1065
1066 switch (ix)
1067 {
1068 case 0:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1070 ta.next = 0;
1071 ta.flags = TRANSFER_SET_STACKLEVEL;
1072 break;
1073
1074 case 1:
1075 if (items != 3)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1077
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1079 break;
1080
1081 case 2:
1082 prepare_schedule (&ta);
1083 break;
1084
1085 case 3:
1086 prepare_cede (&ta);
1087 break;
1088
1089 case 4:
1090 {
1091 SV *yieldstack;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break;
1114
1115 }
1116
1117 TRANSFER (ta);
1118}
1119 2170
1120void 2171void
1121_clone_state_from (SV *dst, SV *src) 2172transfer (...)
2173 PROTOTYPE: $$
1122 CODE: 2174 CODE:
1123{ 2175 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1124 struct coro *coro_src = SvSTATE (src);
1125 2176
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2177bool
1127 2178_destroy (SV *coro_sv)
1128 ++coro_src->refcnt; 2179 CODE:
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2180 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1130} 2181 OUTPUT:
2182 RETVAL
1131 2183
1132void 2184void
1133_exit (code) 2185_exit (int code)
1134 int code
1135 PROTOTYPE: $ 2186 PROTOTYPE: $
1136 CODE: 2187 CODE:
1137 _exit (code); 2188 _exit (code);
1138 2189
2190int
2191cctx_stacksize (int new_stacksize = 0)
2192 PROTOTYPE: ;$
2193 CODE:
2194 RETVAL = cctx_stacksize;
2195 if (new_stacksize)
2196 {
2197 cctx_stacksize = new_stacksize;
2198 ++cctx_gen;
2199 }
2200 OUTPUT:
2201 RETVAL
2202
2203int
2204cctx_max_idle (int max_idle = 0)
2205 PROTOTYPE: ;$
2206 CODE:
2207 RETVAL = cctx_max_idle;
2208 if (max_idle > 1)
2209 cctx_max_idle = max_idle;
2210 OUTPUT:
2211 RETVAL
2212
2213int
2214cctx_count ()
2215 PROTOTYPE:
2216 CODE:
2217 RETVAL = cctx_count;
2218 OUTPUT:
2219 RETVAL
2220
2221int
2222cctx_idle ()
2223 PROTOTYPE:
2224 CODE:
2225 RETVAL = cctx_idle;
2226 OUTPUT:
2227 RETVAL
2228
2229void
2230list ()
2231 PROTOTYPE:
2232 PPCODE:
2233{
2234 struct coro *coro;
2235 for (coro = coro_first; coro; coro = coro->next)
2236 if (coro->hv)
2237 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2238}
2239
2240void
2241call (Coro::State coro, SV *coderef)
2242 ALIAS:
2243 eval = 1
2244 CODE:
2245{
2246 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2247 {
2248 struct coro temp;
2249
2250 if (!(coro->flags & CF_RUNNING))
2251 {
2252 PUTBACK;
2253 save_perl (aTHX_ &temp);
2254 load_perl (aTHX_ coro);
2255 }
2256
2257 {
2258 dSP;
2259 ENTER;
2260 SAVETMPS;
2261 PUTBACK;
2262 PUSHSTACK;
2263 PUSHMARK (SP);
2264
2265 if (ix)
2266 eval_sv (coderef, 0);
2267 else
2268 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2269
2270 POPSTACK;
2271 SPAGAIN;
2272 FREETMPS;
2273 LEAVE;
2274 PUTBACK;
2275 }
2276
2277 if (!(coro->flags & CF_RUNNING))
2278 {
2279 save_perl (aTHX_ coro);
2280 load_perl (aTHX_ &temp);
2281 SPAGAIN;
2282 }
2283 }
2284}
2285
2286SV *
2287is_ready (Coro::State coro)
2288 PROTOTYPE: $
2289 ALIAS:
2290 is_ready = CF_READY
2291 is_running = CF_RUNNING
2292 is_new = CF_NEW
2293 is_destroyed = CF_DESTROYED
2294 CODE:
2295 RETVAL = boolSV (coro->flags & ix);
2296 OUTPUT:
2297 RETVAL
2298
2299void
2300throw (Coro::State self, SV *throw = &PL_sv_undef)
2301 PROTOTYPE: $;$
2302 CODE:
2303 SvREFCNT_dec (self->throw);
2304 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2305
2306void
2307api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2308 PROTOTYPE: $;$
2309 C_ARGS: aTHX_ coro, flags
2310
2311SV *
2312has_cctx (Coro::State coro)
2313 PROTOTYPE: $
2314 CODE:
2315 RETVAL = boolSV (!!coro->cctx);
2316 OUTPUT:
2317 RETVAL
2318
2319int
2320is_traced (Coro::State coro)
2321 PROTOTYPE: $
2322 CODE:
2323 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2324 OUTPUT:
2325 RETVAL
2326
2327UV
2328rss (Coro::State coro)
2329 PROTOTYPE: $
2330 ALIAS:
2331 usecount = 1
2332 CODE:
2333 switch (ix)
2334 {
2335 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2336 case 1: RETVAL = coro->usecount; break;
2337 }
2338 OUTPUT:
2339 RETVAL
2340
2341void
2342force_cctx ()
2343 PROTOTYPE:
2344 CODE:
2345 struct coro *coro = SvSTATE (coro_current);
2346 coro->cctx->idle_sp = 0;
2347
2348void
2349swap_defsv (Coro::State self)
2350 PROTOTYPE: $
2351 ALIAS:
2352 swap_defav = 1
2353 CODE:
2354 if (!self->slot)
2355 croak ("cannot swap state with coroutine that has no saved state,");
2356 else
2357 {
2358 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2359 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2360
2361 SV *tmp = *src; *src = *dst; *dst = tmp;
2362 }
2363
1139MODULE = Coro::State PACKAGE = Coro 2364MODULE = Coro::State PACKAGE = Coro
1140 2365
1141BOOT: 2366BOOT:
1142{ 2367{
1143 int i; 2368 int i;
1144 2369
2370 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2371 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2372 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2373
2374 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2375 SvREADONLY_on (coro_current);
2376
1145 coro_stash = gv_stashpv ("Coro", TRUE); 2377 coro_stash = gv_stashpv ("Coro", TRUE);
1146 2378
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2379 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2380 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2381 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2382 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2383 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2384 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153 2385
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2386 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV (); 2387 coro_ready[i] = newAV ();
1159 2388
1160 { 2389 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 2390 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1162 2391
1163 coroapi.schedule = api_schedule; 2392 coroapi.schedule = api_schedule;
1164 coroapi.cede = api_cede; 2393 coroapi.cede = api_cede;
2394 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 2395 coroapi.ready = api_ready;
2396 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 2397 coroapi.nready = coro_nready;
1167 coroapi.current = coro_current; 2398 coroapi.current = coro_current;
1168 2399
1169 GCoroAPI = &coroapi; 2400 GCoroAPI = &coroapi;
1170 sv_setiv (sv, (IV)&coroapi); 2401 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 2402 SvREADONLY_on (sv);
1172 } 2403 }
1173} 2404}
1174 2405
2406void
2407schedule (...)
2408 CODE:
2409 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2410
2411void
2412cede (...)
2413 CODE:
2414 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2415
2416void
2417cede_notself (...)
2418 CODE:
2419 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2420
2421void
2422_set_current (SV *current)
2423 PROTOTYPE: $
2424 CODE:
2425 SvREFCNT_dec (SvRV (coro_current));
2426 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2427
2428void
2429_set_readyhook (SV *hook)
2430 PROTOTYPE: $
2431 CODE:
2432 LOCK;
2433 SvREFCNT_dec (coro_readyhook);
2434 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2435 UNLOCK;
2436
1175int 2437int
1176prio (Coro::State coro, int newprio = 0) 2438prio (Coro::State coro, int newprio = 0)
2439 PROTOTYPE: $;$
1177 ALIAS: 2440 ALIAS:
1178 nice = 1 2441 nice = 1
1179 CODE: 2442 CODE:
1180{ 2443{
1181 RETVAL = coro->prio; 2444 RETVAL = coro->prio;
1182 2445
1183 if (items > 1) 2446 if (items > 1)
1184 { 2447 {
1185 if (ix) 2448 if (ix)
1186 newprio += coro->prio; 2449 newprio = coro->prio - newprio;
1187 2450
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2451 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2452 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190 2453
1191 coro->prio = newprio; 2454 coro->prio = newprio;
1192 } 2455 }
1193} 2456}
2457 OUTPUT:
2458 RETVAL
1194 2459
1195void 2460SV *
1196ready (SV *self) 2461ready (SV *self)
1197 PROTOTYPE: $ 2462 PROTOTYPE: $
1198 CODE: 2463 CODE:
1199 api_ready (self); 2464 RETVAL = boolSV (api_ready (aTHX_ self));
2465 OUTPUT:
2466 RETVAL
1200 2467
1201int 2468int
1202nready (...) 2469nready (...)
1203 PROTOTYPE: 2470 PROTOTYPE:
1204 CODE: 2471 CODE:
1205 RETVAL = coro_nready; 2472 RETVAL = coro_nready;
1206 OUTPUT: 2473 OUTPUT:
1207 RETVAL 2474 RETVAL
1208 2475
2476# for async_pool speedup
2477void
2478_pool_1 (SV *cb)
2479 CODE:
2480{
2481 struct coro *coro = SvSTATE (coro_current);
2482 HV *hv = (HV *)SvRV (coro_current);
2483 AV *defav = GvAV (PL_defgv);
2484 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2485 AV *invoke_av;
2486 int i, len;
2487
2488 if (!invoke)
2489 {
2490 SV *old = PL_diehook;
2491 PL_diehook = 0;
2492 SvREFCNT_dec (old);
2493 croak ("\3async_pool terminate\2\n");
2494 }
2495
2496 SvREFCNT_dec (coro->saved_deffh);
2497 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2498
2499 hv_store (hv, "desc", sizeof ("desc") - 1,
2500 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2501
2502 invoke_av = (AV *)SvRV (invoke);
2503 len = av_len (invoke_av);
2504
2505 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2506
2507 if (len > 0)
2508 {
2509 av_fill (defav, len - 1);
2510 for (i = 0; i < len; ++i)
2511 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2512 }
2513}
2514
2515void
2516_pool_2 (SV *cb)
2517 CODE:
2518{
2519 struct coro *coro = SvSTATE (coro_current);
2520
2521 sv_setsv (cb, &PL_sv_undef);
2522
2523 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2524 coro->saved_deffh = 0;
2525
2526 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2527 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 av_clear (GvAV (PL_defgv));
2536 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2537 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2538
2539 coro->prio = 0;
2540
2541 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2542 api_trace (aTHX_ coro_current, 0);
2543
2544 av_push (av_async_pool, newSVsv (coro_current));
2545}
2546
2547
1209MODULE = Coro::State PACKAGE = Coro::AIO 2548MODULE = Coro::State PACKAGE = Coro::AIO
1210 2549
2550void
2551_get_state (SV *self)
2552 PROTOTYPE: $
2553 PPCODE:
2554{
2555 AV *defav = GvAV (PL_defgv);
2556 AV *av = newAV ();
2557 int i;
2558 SV *data_sv = newSV (sizeof (struct io_state));
2559 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2560 SvCUR_set (data_sv, sizeof (struct io_state));
2561 SvPOK_only (data_sv);
2562
2563 data->errorno = errno;
2564 data->laststype = PL_laststype;
2565 data->laststatval = PL_laststatval;
2566 data->statcache = PL_statcache;
2567
2568 av_extend (av, AvFILLp (defav) + 1 + 1);
2569
2570 for (i = 0; i <= AvFILLp (defav); ++i)
2571 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2572
2573 av_push (av, data_sv);
2574
2575 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2576
2577 api_ready (aTHX_ self);
2578}
2579
2580void
2581_set_state (SV *state)
2582 PROTOTYPE: $
2583 PPCODE:
2584{
2585 AV *av = (AV *)SvRV (state);
2586 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2587 int i;
2588
2589 errno = data->errorno;
2590 PL_laststype = data->laststype;
2591 PL_laststatval = data->laststatval;
2592 PL_statcache = data->statcache;
2593
2594 EXTEND (SP, AvFILLp (av));
2595 for (i = 0; i < AvFILLp (av); ++i)
2596 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2597}
2598
2599
2600MODULE = Coro::State PACKAGE = Coro::AnyEvent
2601
2602BOOT:
2603 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2604
2605void
2606_schedule (...)
2607 CODE:
2608{
2609 static int incede;
2610
2611 api_cede_notself (aTHX);
2612
2613 ++incede;
2614 while (coro_nready >= incede && api_cede (aTHX))
2615 ;
2616
2617 sv_setsv (sv_activity, &PL_sv_undef);
2618 if (coro_nready >= incede)
2619 {
2620 PUSHMARK (SP);
2621 PUTBACK;
2622 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2623 SPAGAIN;
2624 }
2625
2626 --incede;
2627}
2628
2629
2630MODULE = Coro::State PACKAGE = PerlIO::cede
2631
2632BOOT:
2633 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2634
2635MODULE = Coro::State PACKAGE = Coro::Semaphore
2636
1211SV * 2637SV *
1212_get_state () 2638new (SV *klass, SV *count_ = 0)
1213 CODE: 2639 CODE:
1214{ 2640{
1215 struct { 2641 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1216 int errorno; 2642 AV *av = newAV ();
1217 int laststype; 2643 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1218 int laststatval; 2644 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1219 Stat_t statcache;
1220 } data;
1221
1222 data.errorno = errno;
1223 data.laststype = PL_laststype;
1224 data.laststatval = PL_laststatval;
1225 data.statcache = PL_statcache;
1226
1227 RETVAL = newSVpvn ((char *)&data, sizeof data);
1228} 2645}
1229 OUTPUT: 2646 OUTPUT:
1230 RETVAL 2647 RETVAL
1231 2648
2649SV *
2650count (SV *self)
2651 CODE:
2652 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2653 OUTPUT:
2654 RETVAL
2655
1232void 2656void
1233_set_state (char *data_) 2657up (SV *self, int adjust = 1)
1234 PROTOTYPE: $ 2658 ALIAS:
2659 adjust = 1
2660 CODE:
2661{
2662 AV *av = (AV *)SvRV (self);
2663 SV *count_sv = AvARRAY (av)[0];
2664 IV count = SvIVX (count_sv);
2665
2666 count += ix ? adjust : 1;
2667 SvIVX (count_sv) = count;
2668
2669 /* now wake up as many waiters as possible */
2670 while (count > 0 && AvFILLp (av) >= count)
2671 {
2672 SV *cb;
2673
2674 /* swap first two elements so we can shift a waiter */
2675 AvARRAY (av)[0] = AvARRAY (av)[1];
2676 AvARRAY (av)[1] = count_sv;
2677 cb = av_shift (av);
2678
2679 if (SvOBJECT (cb))
2680 api_ready (aTHX_ cb);
2681 else
2682 croak ("callbacks not yet supported");
2683
2684 SvREFCNT_dec (cb);
2685 }
2686}
2687
2688void
2689down (SV *self)
2690 CODE:
2691 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2692
2693void
2694try (SV *self)
2695 PPCODE:
2696{
2697 AV *av = (AV *)SvRV (self);
2698 SV *count_sv = AvARRAY (av)[0];
2699 IV count = SvIVX (count_sv);
2700
2701 if (count > 0)
2702 {
2703 --count;
2704 SvIVX (count_sv) = count;
2705 XSRETURN_YES;
2706 }
2707 else
2708 XSRETURN_NO;
2709}
2710
2711void
2712waiters (SV *self)
1235 CODE: 2713 CODE:
1236{ 2714{
1237 struct { 2715 AV *av = (AV *)SvRV (self);
2716
2717 if (GIMME_V == G_SCALAR)
2718 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2719 else
2720 {
1238 int errorno; 2721 int i;
1239 int laststype; 2722 EXTEND (SP, AvFILLp (av) + 1 - 1);
1240 int laststatval; 2723 for (i = 1; i <= AvFILLp (av); ++i)
1241 Stat_t statcache; 2724 PUSHs (newSVsv (AvARRAY (av)[i]));
1242 } *data = (void *)data_; 2725 }
1243
1244 errno = data->errorno;
1245 PL_laststype = data->laststype;
1246 PL_laststatval = data->laststatval;
1247 PL_statcache = data->statcache;
1248} 2726}
2727

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