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Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.258 by root, Sun Nov 9 23:08:49 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, 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# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 66# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
14# endif 68# endif
15# ifndef call_sv 69# ifndef call_sv
16# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 81# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
29# endif 83# endif
30#endif 84#endif
31 85
32#include <errno.h> 86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
33 108
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 110# undef CORO_STACKGUARD
36#endif 111#endif
37 112
38#ifndef STACKGUARD 113#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 114# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel
125#define STACKLEVEL ((void *)&stacklevel)
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
51# endif 153# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61 154
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64
65/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69
70#define IN_DESTRUCT (PL_main_cv == Nullcv)
71
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else 155#else
156
81# define LOCK (void)0 157# define LOCK (void)0
82# define UNLOCK (void)0 158# define UNLOCK (void)0
83#endif
84 159
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;
85static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
86static 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;
87static HV *coro_state_stash; 184static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 186
92/* this is actually not only the c stack but also c registers etc... */ 187static GV *irsgv; /* $/ */
188static GV *stdoutgv; /* *STDOUT */
189static SV *rv_diehook;
190static SV *rv_warnhook;
191static HV *hv_sig; /* %SIG */
192
193/* async_pool helper stuff */
194static SV *sv_pool_rss;
195static SV *sv_pool_size;
196static AV *av_async_pool;
197
198/* Coro::AnyEvent */
199static SV *sv_activity;
200
201static struct coro_cctx *cctx_first;
202static int cctx_count, cctx_idle;
203
204enum {
205 CC_MAPPED = 0x01,
206 CC_NOREUSE = 0x02, /* throw this away after tracing */
207 CC_TRACE = 0x04,
208 CC_TRACE_SUB = 0x08, /* trace sub calls */
209 CC_TRACE_LINE = 0x10, /* trace each statement */
210 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211};
212
213/* this is a structure representing a c-level coroutine */
214typedef struct coro_cctx {
215 struct coro_cctx *next;
216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
225 coro_context cctx;
226
227 U32 gen;
228#if CORO_USE_VALGRIND
229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
233
234enum {
235 CF_RUNNING = 0x0001, /* coroutine is running */
236 CF_READY = 0x0002, /* coroutine is ready */
237 CF_NEW = 0x0004, /* has never been switched to */
238 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
239};
240
241/* the structure where most of the perl state is stored, overlaid on the cxstack */
93typedef struct { 242typedef struct {
94 int refcnt; /* pointer reference counter */ 243 SV *defsv;
95 int usecnt; /* shared by how many coroutines */ 244 AV *defav;
96 int gencnt; /* generation counter */ 245 SV *errsv;
246 SV *irsgv;
247#define VAR(name,type) type name;
248# include "state.h"
249#undef VAR
250} perl_slots;
97 251
98 coro_context cctx; 252#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99 253
100 void *sptr; 254/* this is a structure representing a perl-level coroutine */
101 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103
104struct coro { 255struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 256 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 257 coro_cctx *cctx;
107 258
108 /* the optional C context */ 259 /* process data */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 260 AV *mainstack;
126 SV **stack_sp; 261 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 262
153 /* data associated with this coroutine (initial args) */ 263 AV *args; /* data associated with this coroutine (initial args) */
154 AV *args; 264 int refcnt; /* coroutines are refcounted, yes */
265 int flags; /* CF_ flags */
266 HV *hv; /* the perl hash associated with this coro, if any */
267
268 /* statistics */
269 int usecount; /* number of transfers to this coro */
270
271 /* coro process data */
272 int prio;
273 SV *throw; /* exception to be thrown */
274
275 /* async_pool */
276 SV *saved_deffh;
277
278 /* linked list */
279 struct coro *next, *prev;
155}; 280};
156 281
157typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
159 284
285/** Coro ********************************************************************/
286
287#define PRIO_MAX 3
288#define PRIO_HIGH 1
289#define PRIO_NORMAL 0
290#define PRIO_LOW -1
291#define PRIO_IDLE -3
292#define PRIO_MIN -4
293
294/* for Coro.pm */
295static SV *coro_current;
296static SV *coro_readyhook;
297static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298static int coro_nready;
299static struct coro *coro_first;
300
301/** lowlevel stuff **********************************************************/
302
303static SV *
304coro_get_sv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_sv (name, create);
309#endif
310 return get_sv (name, create);
311}
312
313static AV *
314coro_get_av (pTHX_ const char *name, int create)
315{
316#if PERL_VERSION_ATLEAST (5,10,0)
317 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
318 get_av (name, create);
319#endif
320 return get_av (name, create);
321}
322
323static HV *
324coro_get_hv (pTHX_ const char *name, int create)
325{
326#if PERL_VERSION_ATLEAST (5,10,0)
327 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
328 get_hv (name, create);
329#endif
330 return get_hv (name, create);
331}
332
160static AV * 333static AV *
161coro_clone_padlist (pTHX_ CV *cv) 334coro_clone_padlist (pTHX_ CV *cv)
162{ 335{
163 AV *padlist = CvPADLIST (cv); 336 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 337 AV *newpadlist, *newpad;
165 338
166 newpadlist = newAV (); 339 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 340 AvREAL_off (newpadlist);
168#if PERL_VERSION < 9 341#if PERL_VERSION_ATLEAST (5,10,0)
342 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
343#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 344 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#endif 345#endif
173 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 346 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174 --AvFILLp (padlist); 347 --AvFILLp (padlist);
175 348
176 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 349 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
177 av_store (newpadlist, 1, (SV *)newpad); 350 av_store (newpadlist, 1, (SV *)newpad);
178 351
179 return newpadlist; 352 return newpadlist;
180} 353}
181 354
… …
211 384
212 /* casting is fun. */ 385 /* casting is fun. */
213 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 386 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214 free_padlist (aTHX_ padlist); 387 free_padlist (aTHX_ padlist);
215 388
216 SvREFCNT_dec (av); 389 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
217 390
218 return 0; 391 return 0;
219} 392}
220 393
221#define PERL_MAGIC_coro PERL_MAGIC_ext 394#define CORO_MAGIC_type_cv PERL_MAGIC_ext
395#define CORO_MAGIC_type_state PERL_MAGIC_ext
222 396
223static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 397static MGVTBL coro_cv_vtbl = {
398 0, 0, 0, 0,
399 coro_cv_free
400};
401
402#define CORO_MAGIC(sv, type) \
403 SvMAGIC (sv) \
404 ? SvMAGIC (sv)->mg_type == type \
405 ? SvMAGIC (sv) \
406 : mg_find (sv, type) \
407 : 0
408
409#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
410#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
411
412static struct coro *
413SvSTATE_ (pTHX_ SV *coro)
414{
415 HV *stash;
416 MAGIC *mg;
417
418 if (SvROK (coro))
419 coro = SvRV (coro);
420
421 if (expect_false (SvTYPE (coro) != SVt_PVHV))
422 croak ("Coro::State object required");
423
424 stash = SvSTASH (coro);
425 if (expect_false (stash != coro_stash && stash != coro_state_stash))
426 {
427 /* very slow, but rare, check */
428 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
429 croak ("Coro::State object required");
430 }
431
432 mg = CORO_MAGIC_state (coro);
433 return (struct coro *)mg->mg_ptr;
434}
435
436#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
224 437
225/* the next two functions merely cache the padlists */ 438/* the next two functions merely cache the padlists */
226static void 439static void
227get_padlist (pTHX_ CV *cv) 440get_padlist (pTHX_ CV *cv)
228{ 441{
229 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 442 MAGIC *mg = CORO_MAGIC_cv (cv);
443 AV *av;
230 444
231 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 445 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
232 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 446 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233 else 447 else
234 { 448 {
235#if 0 449#if CORO_PREFER_PERL_FUNCTIONS
236 /* this should work - but it doesn't :( */ 450 /* this is probably cleaner? but also slower! */
451 /* in practise, it seems to be less stable */
237 CV *cp = Perl_cv_clone (aTHX_ cv); 452 CV *cp = Perl_cv_clone (cv);
238 CvPADLIST (cv) = CvPADLIST (cp); 453 CvPADLIST (cv) = CvPADLIST (cp);
239 CvPADLIST (cp) = 0; 454 CvPADLIST (cp) = 0;
240 SvREFCNT_dec (cp); 455 SvREFCNT_dec (cp);
241#else 456#else
242 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 457 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
245} 460}
246 461
247static void 462static void
248put_padlist (pTHX_ CV *cv) 463put_padlist (pTHX_ CV *cv)
249{ 464{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 465 MAGIC *mg = CORO_MAGIC_cv (cv);
466 AV *av;
251 467
252 if (!mg) 468 if (expect_false (!mg))
253 { 469 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
254 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256 mg->mg_virtual = &vtbl_coro;
257 mg->mg_obj = (SV *)newAV ();
258 }
259 470
260 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 471 av = (AV *)mg->mg_obj;
261}
262 472
263#define SB do { 473 if (expect_false (AvFILLp (av) >= AvMAX (av)))
264#define SE } while (0) 474 av_extend (av, AvMAX (av) + 1);
265 475
266#define LOAD(state) load_state(aTHX_ (state)); 476 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 477}
268 478
269#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 479/** load & save, init *******************************************************/
270 480
271static void 481static void
272load_state(pTHX_ Coro__State c) 482load_perl (pTHX_ Coro__State c)
273{ 483{
274 PL_dowarn = c->dowarn; 484 perl_slots *slot = c->slot;
275 PL_in_eval = c->in_eval; 485 c->slot = 0;
276 486
277 PL_curstackinfo = c->curstackinfo;
278 PL_curstack = c->curstack;
279 PL_mainstack = c->mainstack; 487 PL_mainstack = c->mainstack;
280 PL_stack_sp = c->stack_sp;
281 PL_op = c->op;
282 PL_curpad = c->curpad;
283 PL_comppad = c->comppad;
284 PL_compcv = c->compcv;
285 PL_stack_base = c->stack_base;
286 PL_stack_max = c->stack_max;
287 PL_tmps_stack = c->tmps_stack;
288 PL_tmps_floor = c->tmps_floor;
289 PL_tmps_ix = c->tmps_ix;
290 PL_tmps_max = c->tmps_max;
291 PL_markstack = c->markstack;
292 PL_markstack_ptr = c->markstack_ptr;
293 PL_markstack_max = c->markstack_max;
294 PL_scopestack = c->scopestack;
295 PL_scopestack_ix = c->scopestack_ix;
296 PL_scopestack_max = c->scopestack_max;
297 PL_savestack = c->savestack;
298 PL_savestack_ix = c->savestack_ix;
299 PL_savestack_max = c->savestack_max;
300#if PERL_VERSION < 9
301 PL_retstack = c->retstack;
302 PL_retstack_ix = c->retstack_ix;
303 PL_retstack_max = c->retstack_max;
304#endif
305 PL_curpm = c->curpm;
306 PL_curcop = c->curcop;
307 PL_top_env = c->top_env;
308 488
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 489 GvSV (PL_defgv) = slot->defsv;
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 490 GvAV (PL_defgv) = slot->defav;
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 491 GvSV (PL_errgv) = slot->errsv;
492 GvSV (irsgv) = slot->irsgv;
493
494 #define VAR(name,type) PL_ ## name = slot->name;
495 # include "state.h"
496 #undef VAR
312 497
313 { 498 {
314 dSP; 499 dSP;
500
315 CV *cv; 501 CV *cv;
316 502
317 /* now do the ugly restore mess */ 503 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 504 while (expect_true (cv = (CV *)POPs))
319 { 505 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 506 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 507 CvDEPTH (cv) = PTR2IV (POPs);
326 } 508 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 509 }
330 510
331 PUTBACK; 511 PUTBACK;
332 } 512 }
333} 513}
334 514
335static void 515static void
336save_state(pTHX_ Coro__State c, int flags) 516save_perl (pTHX_ Coro__State c)
337{ 517{
338 { 518 {
339 dSP; 519 dSP;
340 I32 cxix = cxstack_ix; 520 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 521 PERL_CONTEXT *ccstk = cxstack;
… …
344 /* 524 /*
345 * the worst thing you can imagine happens first - we have to save 525 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 526 * (and reinitialize) all cv's in the whole callchain :(
347 */ 527 */
348 528
349 PUSHs (Nullsv); 529 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 530 /* this loop was inspired by pp_caller */
351 for (;;) 531 for (;;)
352 { 532 {
353 while (cxix >= 0) 533 while (expect_true (cxix >= 0))
354 { 534 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 535 PERL_CONTEXT *cx = &ccstk[cxix--];
356 536
357 if (CxTYPE(cx) == CXt_SUB) 537 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358 { 538 {
359 CV *cv = cx->blk_sub.cv; 539 CV *cv = cx->blk_sub.cv;
540
360 if (CvDEPTH(cv)) 541 if (expect_true (CvDEPTH (cv)))
361 { 542 {
362 EXTEND (SP, CvDEPTH(cv)*2); 543 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 544 PUSHs ((SV *)CvPADLIST (cv));
545 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 546 PUSHs ((SV *)cv);
373 547
548 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 549 get_padlist (aTHX_ cv);
375 } 550 }
376 } 551 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 552 }
386 553
387 if (top_si->si_type == PERLSI_MAIN) 554 if (expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 555 break;
389 556
390 top_si = top_si->si_prev; 557 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 558 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 559 cxix = top_si->si_cxix;
393 } 560 }
394 561
395 PUTBACK; 562 PUTBACK;
396 } 563 }
397 564
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 565 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 566 /* we manually unroll here, as usually 2 slots is enough */
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 567 if (SLOT_COUNT >= 1) CXINC;
568 if (SLOT_COUNT >= 2) CXINC;
569 if (SLOT_COUNT >= 3) CXINC;
570 {
571 int i;
572 for (i = 3; i < SLOT_COUNT; ++i)
573 CXINC;
574 }
575 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 576
402 c->dowarn = PL_dowarn;
403 c->in_eval = PL_in_eval;
404
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack; 577 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 578
409 c->op = PL_op; 579 {
410 c->curpad = PL_curpad; 580 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 581
412 c->compcv = PL_compcv; 582 slot->defav = GvAV (PL_defgv);
413 c->stack_base = PL_stack_base; 583 slot->defsv = DEFSV;
414 c->stack_max = PL_stack_max; 584 slot->errsv = ERRSV;
415 c->tmps_stack = PL_tmps_stack; 585 slot->irsgv = GvSV (irsgv);
416 c->tmps_floor = PL_tmps_floor; 586
417 c->tmps_ix = PL_tmps_ix; 587 #define VAR(name,type) slot->name = PL_ ## name;
418 c->tmps_max = PL_tmps_max; 588 # include "state.h"
419 c->markstack = PL_markstack; 589 #undef VAR
420 c->markstack_ptr = PL_markstack_ptr; 590 }
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435 c->top_env = PL_top_env;
436} 591}
437 592
438/* 593/*
439 * allocate various perl stacks. This is an exact copy 594 * allocate various perl stacks. This is an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 595 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 596 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 597 * not usually need a lot of stackspace.
443 */ 598 */
599#if CORO_PREFER_PERL_FUNCTIONS
600# define coro_init_stacks init_stacks
601#else
444static void 602static void
445coro_init_stacks (pTHX) 603coro_init_stacks (pTHX)
446{ 604{
447 LOCK; 605 PL_curstackinfo = new_stackinfo(32, 8);
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450 PL_curstackinfo->si_type = PERLSI_MAIN; 606 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 607 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 608 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 609
454 PL_stack_base = AvARRAY(PL_curstack); 610 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 611 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 612 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 613
458 New(50,PL_tmps_stack,96,SV*); 614 New(50,PL_tmps_stack,32,SV*);
459 PL_tmps_floor = -1; 615 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 616 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 617 PL_tmps_max = 32;
462 618
463 New(54,PL_markstack,16,I32); 619 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack; 620 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 621 PL_markstack_max = PL_markstack + 16;
466 622
467#ifdef SET_MARK_OFFSET 623#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 624 SET_MARK_OFFSET;
469#endif 625#endif
470 626
471 New(54,PL_scopestack,16,I32); 627 New(54,PL_scopestack,8,I32);
472 PL_scopestack_ix = 0; 628 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 629 PL_scopestack_max = 8;
474 630
475 New(54,PL_savestack,96,ANY); 631 New(54,PL_savestack,24,ANY);
476 PL_savestack_ix = 0; 632 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 633 PL_savestack_max = 24;
478 634
479#if PERL_VERSION < 9 635#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 636 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 637 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 638 PL_retstack_max = 4;
483#endif 639#endif
484
485 UNLOCK;
486} 640}
641#endif
487 642
488/* 643/*
489 * destroy the stacks, the callchain etc... 644 * destroy the stacks, the callchain etc...
490 */ 645 */
491static void 646static void
492destroy_stacks(pTHX) 647coro_destruct_stacks (pTHX)
493{ 648{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 LEAVE_SCOPE (0);
498
499 /* sure it is, but more important: is it correct?? :/ */
500 FREETMPS;
501
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 }
504
505 while (PL_curstackinfo->si_next) 649 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 650 PL_curstackinfo = PL_curstackinfo->si_next;
507 651
508 while (PL_curstackinfo) 652 while (PL_curstackinfo)
509 { 653 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 654 PERL_SI *p = PL_curstackinfo->si_prev;
511 655
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 656 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 657 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 658
524 Safefree (PL_curstackinfo->si_cxstack); 659 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 660 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 661 PL_curstackinfo = p;
527 } 662 }
528 663
529 Safefree (PL_tmps_stack); 664 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 665 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 666 Safefree (PL_scopestack);
532 Safefree (PL_savestack); 667 Safefree (PL_savestack);
533#if PERL_VERSION < 9 668#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree (PL_retstack); 669 Safefree (PL_retstack);
535#endif 670#endif
536} 671}
537 672
538static void 673static size_t
539allocate_stack (Coro__State ctx, int alloc) 674coro_rss (pTHX_ struct coro *coro)
540{ 675{
541 coro_stack *stack; 676 size_t rss = sizeof (*coro);
542 677
543 New (0, stack, 1, coro_stack); 678 if (coro->mainstack)
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548
549 if (alloc)
550 { 679 {
551#if HAVE_MMAP 680 perl_slots tmp_slot;
552 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 681 perl_slots *slot;
553 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 682
554 if (stack->sptr != (void *)-1) 683 if (coro->flags & CF_RUNNING)
555 { 684 {
556# if STACKGUARD 685 slot = &tmp_slot;
557 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 686
558# endif 687 #define VAR(name,type) slot->name = PL_ ## name;
688 # include "state.h"
689 #undef VAR
559 } 690 }
560 else 691 else
561#endif 692 slot = coro->slot;
693
694 if (slot)
562 { 695 {
563 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 696 rss += sizeof (slot->curstackinfo);
564 New (0, stack->sptr, STACKSIZE, long); 697 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
698 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
699 rss += slot->tmps_max * sizeof (SV *);
700 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
701 rss += slot->scopestack_max * sizeof (I32);
702 rss += slot->savestack_max * sizeof (ANY);
703
704#if !PERL_VERSION_ATLEAST (5,10,0)
705 rss += slot->retstack_max * sizeof (OP *);
706#endif
565 } 707 }
566 } 708 }
567 else
568 stack->sptr = 0;
569 709
570 ctx->stack = stack; 710 return rss;
711}
712
713/** coroutine stack handling ************************************************/
714
715static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
716static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
718
719/* apparently < 5.8.8 */
720#ifndef MgPV_nolen_const
721#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
722 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
723 (const char*)(mg)->mg_ptr)
724#endif
725
726/*
727 * This overrides the default magic get method of %SIG elements.
728 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
729 * and instead of tryign to save and restore the hash elements, we just provide
730 * readback here.
731 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
732 * not expecting this to actually change the hook. This is a potential problem
733 * when a schedule happens then, but we ignore this.
734 */
735static int
736coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
737{
738 const char *s = MgPV_nolen_const (mg);
739
740 if (*s == '_')
741 {
742 SV **svp = 0;
743
744 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
745 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
746
747 if (svp)
748 {
749 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
750 return 0;
751 }
752 }
753
754 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
755}
756
757static int
758coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
759{
760 const char *s = MgPV_nolen_const (mg);
761
762 if (*s == '_')
763 {
764 SV **svp = 0;
765
766 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
767 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
768
769 if (svp)
770 {
771 SV *old = *svp;
772 *svp = 0;
773 SvREFCNT_dec (old);
774 return 0;
775 }
776 }
777
778 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = newSVsv (sv);
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
571} 803}
572 804
573static void 805static void
574deallocate_stack (Coro__State ctx) 806coro_setup (pTHX_ struct coro *coro)
575{
576 coro_stack *stack = ctx->stack;
577
578 ctx->stack = 0;
579
580 if (stack)
581 {
582 if (!--stack->refcnt)
583 {
584#ifdef HAVE_MMAP
585 if (stack->ssize > 0 && stack->sptr)
586 munmap (stack->sptr, stack->ssize);
587 else
588#endif
589 Safefree (stack->sptr);
590
591 Safefree (stack);
592 }
593 else if (ctx->gencnt == stack->gencnt)
594 --stack->usecnt;
595 }
596}
597
598static void
599setup_coro (void *arg)
600{ 807{
601 /* 808 /*
602 * emulate part of the perl startup here. 809 * emulate part of the perl startup here.
603 */ 810 */
604 dTHX;
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 811 coro_init_stacks (aTHX);
610 /*PL_curcop = 0;*/ 812
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 813 PL_runops = RUNOPS_DEFAULT;
814 PL_curcop = &PL_compiling;
815 PL_in_eval = EVAL_NULL;
816 PL_comppad = 0;
817 PL_curpm = 0;
818 PL_curpad = 0;
819 PL_localizing = 0;
820 PL_dirty = 0;
821 PL_restartop = 0;
822#if PERL_VERSION_ATLEAST (5,10,0)
823 PL_parser = 0;
824#endif
825
826 /* recreate the die/warn hooks */
827 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
828 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
829
830 GvSV (PL_defgv) = newSV (0);
831 GvAV (PL_defgv) = coro->args; coro->args = 0;
832 GvSV (PL_errgv) = newSV (0);
833 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
834 PL_rs = newSVsv (GvSV (irsgv));
835 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
836
837 {
838 dSP;
839 LOGOP myop;
840
841 Zero (&myop, 1, LOGOP);
842 myop.op_next = Nullop;
843 myop.op_flags = OPf_WANT_VOID;
844
845 PUSHMARK (SP);
846 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
847 PUTBACK;
848 PL_op = (OP *)&myop;
849 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
850 SPAGAIN;
851 }
852
853 /* this newly created coroutine might be run on an existing cctx which most
854 * likely was suspended in set_stacklevel, called from entersub.
855 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
856 * so we ENTER here for symmetry
857 */
858 ENTER;
859}
860
861static void
862coro_destruct (pTHX_ struct coro *coro)
863{
864 if (!IN_DESTRUCT)
865 {
866 /* restore all saved variables and stuff */
867 LEAVE_SCOPE (0);
868 assert (PL_tmps_floor == -1);
869
870 /* free all temporaries */
871 FREETMPS;
872 assert (PL_tmps_ix == -1);
873
874 /* unwind all extra stacks */
875 POPSTACK_TO (PL_mainstack);
876
877 /* unwind main stack */
878 dounwind (-1);
879 }
880
881 SvREFCNT_dec (GvSV (PL_defgv));
612 SvREFCNT_dec (GvAV (PL_defgv)); 882 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 883 SvREFCNT_dec (GvSV (PL_errgv));
884 SvREFCNT_dec (PL_defoutgv);
885 SvREFCNT_dec (PL_rs);
886 SvREFCNT_dec (GvSV (irsgv));
614 887
615 SPAGAIN; 888 SvREFCNT_dec (PL_diehook);
889 SvREFCNT_dec (PL_warnhook);
890
891 SvREFCNT_dec (coro->saved_deffh);
892 SvREFCNT_dec (coro->throw);
616 893
617 if (ctx->stack) 894 coro_destruct_stacks (aTHX);
618 {
619 ctx->cursp = 0;
620
621 PUSHMARK(SP);
622 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625 if (SvTRUE (ERRSV))
626 croak (NULL);
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 }
630 else
631 {
632 UNOP myop;
633
634 Zero(&myop, 1, UNOP);
635 myop.op_next = Nullop;
636 myop.op_flags = OPf_WANT_VOID;
637
638 PL_op = (OP *)&myop;
639
640 PUSHMARK(SP);
641 XPUSHs (sub_init);
642 /*
643 * the next line is slightly wrong, as PL_op->op_next
644 * is actually being executed so we skip the first op.
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651 SPAGAIN;
652
653 ENTER; /* necessary e.g. for dounwind */
654 }
655} 895}
656 896
657static void 897static void
658continue_coro (void *arg) 898free_coro_mortal (pTHX)
659{ 899{
660 /* 900 if (expect_true (coro_mortal))
661 * this is a _very_ stripped down perl interpreter ;) 901 {
662 */ 902 SvREFCNT_dec (coro_mortal);
663 dTHX; 903 coro_mortal = 0;
664 Coro__State ctx = (Coro__State)arg;
665
666 PL_top_env = &ctx->start_env;
667
668 ctx->cursp = 0;
669 PL_op = PL_op->op_next;
670 CALLRUNOPS(aTHX);
671
672 abort ();
673}
674
675static void
676transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677{
678 dSTACKLEVEL;
679
680 if (prev != next)
681 { 904 }
682 if (next->mainstack) 905}
906
907static int
908runops_trace (pTHX)
909{
910 COP *oldcop = 0;
911 int oldcxix = -2;
912 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
913 coro_cctx *cctx = coro->cctx;
914
915 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916 {
917 PERL_ASYNC_CHECK ();
918
919 if (cctx->flags & CC_TRACE_ALL)
683 { 920 {
684 LOCK; 921 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
685 SAVE (prev, flags);
686 LOAD (next);
687 UNLOCK;
688
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 { 922 {
696 if (!prev->stack) 923 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 allocate_stack (prev, 0); 924 SV **bot, **top;
698 else if (prev->cursp != stacklevel 925 AV *av = newAV (); /* return values */
699 && prev->stack->usecnt > 1) 926 SV **cb;
927 dSP;
928
929 GV *gv = CvGV (cx->blk_sub.cv);
930 SV *fullname = sv_2mortal (newSV (0));
931 if (isGV (gv))
932 gv_efullname3 (fullname, gv, 0);
933
934 bot = PL_stack_base + cx->blk_oldsp + 1;
935 top = cx->blk_gimme == G_ARRAY ? SP + 1
936 : cx->blk_gimme == G_SCALAR ? bot + 1
937 : bot;
938
939 av_extend (av, top - bot);
940 while (bot < top)
941 av_push (av, SvREFCNT_inc_NN (*bot++));
942
943 PL_runops = RUNOPS_DEFAULT;
944 ENTER;
945 SAVETMPS;
946 EXTEND (SP, 3);
947 PUSHMARK (SP);
948 PUSHs (&PL_sv_no);
949 PUSHs (fullname);
950 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
951 PUTBACK;
952 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
953 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
954 SPAGAIN;
955 FREETMPS;
956 LEAVE;
957 PL_runops = runops_trace;
958 }
959
960 if (oldcop != PL_curcop)
961 {
962 oldcop = PL_curcop;
963
964 if (PL_curcop != &PL_compiling)
700 { 965 {
701 prev->gencnt = ++prev->stack->gencnt; 966 SV **cb;
702 prev->stack->usecnt = 1;
703 }
704 967
705 /* has our stack been invalidated? */ 968 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 { 969 {
708 deallocate_stack (next); 970 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
709 allocate_stack (next, 1); 971
710 coro_create (&(next->stack->cctx), 972 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
711 continue_coro, (void *)next, 973 {
712 next->stack->sptr, labs (next->stack->ssize)); 974 runops_proc_t old_runops = PL_runops;
975 dSP;
976 GV *gv = CvGV (cx->blk_sub.cv);
977 SV *fullname = sv_2mortal (newSV (0));
978
979 if (isGV (gv))
980 gv_efullname3 (fullname, gv, 0);
981
982 PL_runops = RUNOPS_DEFAULT;
983 ENTER;
984 SAVETMPS;
985 EXTEND (SP, 3);
986 PUSHMARK (SP);
987 PUSHs (&PL_sv_yes);
988 PUSHs (fullname);
989 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
990 PUTBACK;
991 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
992 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
993 SPAGAIN;
994 FREETMPS;
995 LEAVE;
996 PL_runops = runops_trace;
997 }
998
999 oldcxix = cxstack_ix;
713 } 1000 }
714 1001
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1002 if (cctx->flags & CC_TRACE_LINE)
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else
725 {
726 LOCK;
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729
730 if (flags & TRANSFER_SAVE_CCTXT)
731 {
732 if (!prev->stack)
733 allocate_stack (prev, 0);
734
735 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736 { 1003 {
737 PL_top_env = &next->start_env; 1004 dSP;
738 1005
739 setup_coro (next); 1006 PL_runops = RUNOPS_DEFAULT;
740 next->cursp = stacklevel; 1007 ENTER;
741 1008 SAVETMPS;
742 prev->stack->refcnt++; 1009 EXTEND (SP, 3);
743 prev->stack->usecnt++; 1010 PL_runops = RUNOPS_DEFAULT;
744 next->stack = prev->stack; 1011 PUSHMARK (SP);
745 next->gencnt = prev->gencnt; 1012 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1013 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1014 PUTBACK;
1015 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1016 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1017 SPAGAIN;
1018 FREETMPS;
1019 LEAVE;
1020 PL_runops = runops_trace;
746 } 1021 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 } 1022 }
758 } 1023 }
1024 }
1025 }
1026
1027 TAINT_NOT;
1028 return 0;
1029}
1030
1031/* inject a fake call to Coro::State::_cctx_init into the execution */
1032/* _cctx_init should be careful, as it could be called at almost any time */
1033/* during execution of a perl program */
1034static void NOINLINE
1035cctx_prepare (pTHX_ coro_cctx *cctx)
1036{
1037 dSP;
1038 LOGOP myop;
1039
1040 PL_top_env = &PL_start_env;
1041
1042 if (cctx->flags & CC_TRACE)
1043 PL_runops = runops_trace;
1044
1045 Zero (&myop, 1, LOGOP);
1046 myop.op_next = PL_op;
1047 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1048
1049 PUSHMARK (SP);
1050 EXTEND (SP, 2);
1051 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1052 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1053 PUTBACK;
1054 PL_op = (OP *)&myop;
1055 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1056 SPAGAIN;
1057}
1058
1059/*
1060 * this is a _very_ stripped down perl interpreter ;)
1061 */
1062static void
1063cctx_run (void *arg)
1064{
1065#ifdef USE_ITHREADS
1066# if CORO_PTHREAD
1067 PERL_SET_CONTEXT (coro_thx);
1068# endif
1069#endif
1070 {
1071 dTHX;
1072
1073 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1074 UNLOCK;
1075
1076 /* we now skip the entersub that lead to transfer() */
1077 PL_op = PL_op->op_next;
1078
1079 /* inject a fake subroutine call to cctx_init */
1080 cctx_prepare (aTHX_ (coro_cctx *)arg);
1081
1082 /* somebody or something will hit me for both perl_run and PL_restartop */
1083 PL_restartop = PL_op;
1084 perl_run (PL_curinterp);
1085
1086 /*
1087 * If perl-run returns we assume exit() was being called or the coro
1088 * fell off the end, which seems to be the only valid (non-bug)
1089 * reason for perl_run to return. We try to exit by jumping to the
1090 * bootstrap-time "top" top_env, as we cannot restore the "main"
1091 * coroutine as Coro has no such concept
1092 */
1093 PL_top_env = main_top_env;
1094 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1095 }
1096}
1097
1098static coro_cctx *
1099cctx_new ()
1100{
1101 coro_cctx *cctx;
1102
1103 ++cctx_count;
1104 New (0, cctx, 1, coro_cctx);
1105
1106 cctx->gen = cctx_gen;
1107 cctx->flags = 0;
1108
1109 return cctx;
1110}
1111
1112/* create a new cctx only suitable as source */
1113static coro_cctx *
1114cctx_new_empty ()
1115{
1116 coro_cctx *cctx = cctx_new ();
1117
1118 cctx->sptr = 0;
1119 cctx->idle_sp = 0; /* should never be a valid address */
1120 coro_create (&cctx->cctx, 0, 0, 0, 0);
1121
1122 return cctx;
1123}
1124
1125/* create a new cctx suitable as destination/running a perl interpreter */
1126static coro_cctx *
1127cctx_new_run ()
1128{
1129 coro_cctx *cctx = cctx_new ();
1130 void *stack_start;
1131 size_t stack_size;
1132
1133#if HAVE_MMAP
1134 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1135 /* mmap supposedly does allocate-on-write for us */
1136 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1137
1138 if (cctx->sptr != (void *)-1)
1139 {
1140# if CORO_STACKGUARD
1141 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1142# endif
1143 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1144 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1145 cctx->flags |= CC_MAPPED;
1146 }
1147 else
1148#endif
1149 {
1150 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1151 New (0, cctx->sptr, cctx_stacksize, long);
1152
1153 if (!cctx->sptr)
1154 {
1155 perror ("FATAL: unable to allocate stack for coroutine");
1156 _exit (EXIT_FAILURE);
1157 }
1158
1159 stack_start = cctx->sptr;
1160 stack_size = cctx->ssize;
1161 }
1162
1163 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1164 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1165
1166 return cctx;
1167}
1168
1169static void
1170cctx_destroy (coro_cctx *cctx)
1171{
1172 if (!cctx)
1173 return;
1174
1175 --cctx_count;
1176 coro_destroy (&cctx->cctx);
1177
1178 /* coro_transfer creates new, empty cctx's */
1179 if (cctx->sptr)
1180 {
1181#if CORO_USE_VALGRIND
1182 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1183#endif
1184
1185#if HAVE_MMAP
1186 if (cctx->flags & CC_MAPPED)
1187 munmap (cctx->sptr, cctx->ssize);
759 else 1188 else
1189#endif
1190 Safefree (cctx->sptr);
1191 }
1192
1193 Safefree (cctx);
1194}
1195
1196/* wether this cctx should be destructed */
1197#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1198
1199static coro_cctx *
1200cctx_get (pTHX)
1201{
1202 while (expect_true (cctx_first))
1203 {
1204 coro_cctx *cctx = cctx_first;
1205 cctx_first = cctx->next;
1206 --cctx_idle;
1207
1208 if (expect_true (!CCTX_EXPIRED (cctx)))
1209 return cctx;
1210
1211 cctx_destroy (cctx);
1212 }
1213
1214 return cctx_new_run ();
1215}
1216
1217static void
1218cctx_put (coro_cctx *cctx)
1219{
1220 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1221
1222 /* free another cctx if overlimit */
1223 if (expect_false (cctx_idle >= cctx_max_idle))
1224 {
1225 coro_cctx *first = cctx_first;
1226 cctx_first = first->next;
1227 --cctx_idle;
1228
1229 cctx_destroy (first);
1230 }
1231
1232 ++cctx_idle;
1233 cctx->next = cctx_first;
1234 cctx_first = cctx;
1235}
1236
1237/** coroutine switching *****************************************************/
1238
1239static void
1240transfer_check (pTHX_ struct coro *prev, struct coro *next)
1241{
1242 if (expect_true (prev != next))
1243 {
1244 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1245 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1246
1247 if (expect_false (next->flags & CF_RUNNING))
1248 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1249
1250 if (expect_false (next->flags & CF_DESTROYED))
1251 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1252
1253#if !PERL_VERSION_ATLEAST (5,10,0)
1254 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1255 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1256#endif
1257 }
1258}
1259
1260/* always use the TRANSFER macro */
1261static void NOINLINE
1262transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1263{
1264 dSTACKLEVEL;
1265
1266 /* sometimes transfer is only called to set idle_sp */
1267 if (expect_false (!next))
1268 {
1269 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1270 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1271 }
1272 else if (expect_true (prev != next))
1273 {
1274 static volatile int has_throw;
1275 coro_cctx *prev__cctx;
1276
1277 if (expect_false (prev->flags & CF_NEW))
1278 {
1279 /* create a new empty/source context */
1280 prev->cctx = cctx_new_empty ();
1281 prev->flags &= ~CF_NEW;
1282 prev->flags |= CF_RUNNING;
1283 }
1284
1285 prev->flags &= ~CF_RUNNING;
1286 next->flags |= CF_RUNNING;
1287
1288 LOCK;
1289
1290 /* first get rid of the old state */
1291 save_perl (aTHX_ prev);
1292
1293 if (expect_false (next->flags & CF_NEW))
1294 {
1295 /* need to start coroutine */
1296 next->flags &= ~CF_NEW;
1297 /* setup coroutine call */
1298 coro_setup (aTHX_ next);
1299 }
1300 else
1301 load_perl (aTHX_ next);
1302
1303 prev__cctx = prev->cctx;
1304
1305 /* possibly "free" the cctx */
1306 if (expect_true (
1307 prev__cctx->idle_sp == STACKLEVEL
1308 && !(prev__cctx->flags & CC_TRACE)
1309 && !force_cctx
1310 ))
1311 {
1312 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1313 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1314
1315 prev->cctx = 0;
1316
1317 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1318 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1319 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1320 if (!next->cctx)
1321 next->cctx = cctx_get (aTHX);
1322
1323 cctx_put (prev__cctx);
1324 }
1325
1326 ++next->usecount;
1327
1328 if (expect_true (!next->cctx))
1329 next->cctx = cctx_get (aTHX);
1330
1331 has_throw = !!next->throw;
1332
1333 if (expect_false (prev__cctx != next->cctx))
1334 {
1335 prev__cctx->top_env = PL_top_env;
1336 PL_top_env = next->cctx->top_env;
1337 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1338 }
1339
1340 free_coro_mortal (aTHX);
1341 UNLOCK;
1342
1343 if (expect_false (has_throw))
1344 {
1345 struct coro *coro = SvSTATE (coro_current);
1346
1347 if (coro->throw)
760 { 1348 {
1349 SV *exception = coro->throw;
1350 coro->throw = 0;
1351 sv_setsv (ERRSV, exception);
761 setup_coro (next); 1352 croak (0);
762 next->cursp = stacklevel;
763 } 1353 }
764 } 1354 }
765 } 1355 }
1356}
1357
1358struct transfer_args
1359{
1360 struct coro *prev, *next;
1361};
1362
1363#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1364#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1365
1366/** high level stuff ********************************************************/
1367
1368static int
1369coro_state_destroy (pTHX_ struct coro *coro)
1370{
1371 if (coro->flags & CF_DESTROYED)
1372 return 0;
1373
1374 coro->flags |= CF_DESTROYED;
1375
1376 if (coro->flags & CF_READY)
1377 {
1378 /* reduce nready, as destroying a ready coro effectively unreadies it */
1379 /* alternative: look through all ready queues and remove the coro */
1380 LOCK;
1381 --coro_nready;
1382 UNLOCK;
1383 }
1384 else
1385 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1386
1387 if (coro->mainstack && coro->mainstack != main_mainstack)
1388 {
1389 struct coro temp;
1390
1391 if (coro->flags & CF_RUNNING)
1392 croak ("FATAL: tried to destroy currently running coroutine");
1393
1394 save_perl (aTHX_ &temp);
1395 load_perl (aTHX_ coro);
1396
1397 coro_destruct (aTHX_ coro);
1398
1399 load_perl (aTHX_ &temp);
1400
1401 coro->slot = 0;
1402 }
1403
1404 cctx_destroy (coro->cctx);
1405 SvREFCNT_dec (coro->args);
1406
1407 if (coro->next) coro->next->prev = coro->prev;
1408 if (coro->prev) coro->prev->next = coro->next;
1409 if (coro == coro_first) coro_first = coro->next;
1410
1411 return 1;
1412}
1413
1414static int
1415coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1416{
1417 struct coro *coro = (struct coro *)mg->mg_ptr;
1418 mg->mg_ptr = 0;
1419
1420 coro->hv = 0;
1421
1422 if (--coro->refcnt < 0)
1423 {
1424 coro_state_destroy (aTHX_ coro);
1425 Safefree (coro);
1426 }
1427
1428 return 0;
1429}
1430
1431static int
1432coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1433{
1434 struct coro *coro = (struct coro *)mg->mg_ptr;
1435
1436 ++coro->refcnt;
1437
1438 return 0;
1439}
1440
1441static MGVTBL coro_state_vtbl = {
1442 0, 0, 0, 0,
1443 coro_state_free,
1444 0,
1445#ifdef MGf_DUP
1446 coro_state_dup,
1447#else
1448# define MGf_DUP 0
1449#endif
1450};
1451
1452static void
1453prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1454{
1455 ta->prev = SvSTATE (prev_sv);
1456 ta->next = SvSTATE (next_sv);
1457 TRANSFER_CHECK (*ta);
1458}
1459
1460static void
1461api_transfer (SV *prev_sv, SV *next_sv)
1462{
1463 dTHX;
1464 struct transfer_args ta;
1465
1466 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1467 TRANSFER (ta, 1);
1468}
1469
1470/** Coro ********************************************************************/
1471
1472static void
1473coro_enq (pTHX_ SV *coro_sv)
1474{
1475 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1476}
1477
1478static SV *
1479coro_deq (pTHX)
1480{
1481 int prio;
1482
1483 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1484 if (AvFILLp (coro_ready [prio]) >= 0)
1485 return av_shift (coro_ready [prio]);
1486
1487 return 0;
1488}
1489
1490static int
1491api_ready (SV *coro_sv)
1492{
1493 dTHX;
1494 struct coro *coro;
1495 SV *sv_hook;
1496 void (*xs_hook)(void);
1497
1498 if (SvROK (coro_sv))
1499 coro_sv = SvRV (coro_sv);
1500
1501 coro = SvSTATE (coro_sv);
1502
1503 if (coro->flags & CF_READY)
1504 return 0;
1505
1506 coro->flags |= CF_READY;
766 1507
767 LOCK; 1508 LOCK;
768 if (coro_mortal) 1509
769 { 1510 sv_hook = coro_nready ? 0 : coro_readyhook;
770 SvREFCNT_dec (coro_mortal); 1511 xs_hook = coro_nready ? 0 : coroapi.readyhook;
771 coro_mortal = 0; 1512
772 } 1513 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1514 ++coro_nready;
1515
773 UNLOCK; 1516 UNLOCK;
774} 1517
1518 if (sv_hook)
1519 {
1520 dSP;
775 1521
776#define SV_CORO(sv,func) \ 1522 ENTER;
777 do { \ 1523 SAVETMPS;
778 if (SvROK (sv)) \
779 sv = SvRV (sv); \
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796 1524
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1525 PUSHMARK (SP);
1526 PUTBACK;
1527 call_sv (sv_hook, G_DISCARD);
1528 SPAGAIN;
1529
1530 FREETMPS;
1531 LEAVE;
1532 }
1533
1534 if (xs_hook)
1535 xs_hook ();
1536
1537 return 1;
1538}
1539
1540static int
1541api_is_ready (SV *coro_sv)
1542{
1543 dTHX;
1544 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1545}
798 1546
799static void 1547static void
800api_transfer(pTHX_ SV *prev, SV *next, int flags) 1548prepare_schedule (pTHX_ struct transfer_args *ta)
801{ 1549{
802 SV_CORO (prev, "Coro::transfer"); 1550 SV *prev_sv, *next_sv;
803 SV_CORO (next, "Coro::transfer");
804 1551
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1552 for (;;)
806} 1553 {
1554 LOCK;
1555 next_sv = coro_deq (aTHX);
807 1556
808/** Coro ********************************************************************/ 1557 /* nothing to schedule: call the idle handler */
1558 if (expect_false (!next_sv))
1559 {
1560 dSP;
1561 UNLOCK;
809 1562
810#define PRIO_MAX 3 1563 ENTER;
811#define PRIO_HIGH 1 1564 SAVETMPS;
812#define PRIO_NORMAL 0
813#define PRIO_LOW -1
814#define PRIO_IDLE -3
815#define PRIO_MIN -4
816 1565
817/* for Coro.pm */ 1566 PUSHMARK (SP);
818static GV *coro_current, *coro_idle; 1567 PUTBACK;
819static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1568 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
820static int coro_nready; 1569 SPAGAIN;
1570
1571 FREETMPS;
1572 LEAVE;
1573 continue;
1574 }
1575
1576 ta->next = SvSTATE (next_sv);
1577
1578 /* cannot transfer to destroyed coros, skip and look for next */
1579 if (expect_false (ta->next->flags & CF_DESTROYED))
1580 {
1581 UNLOCK;
1582 SvREFCNT_dec (next_sv);
1583 /* coro_nready is already taken care of by destroy */
1584 continue;
1585 }
1586
1587 --coro_nready;
1588 UNLOCK;
1589 break;
1590 }
1591
1592 /* free this only after the transfer */
1593 prev_sv = SvRV (coro_current);
1594 ta->prev = SvSTATE (prev_sv);
1595 TRANSFER_CHECK (*ta);
1596 assert (ta->next->flags & CF_READY);
1597 ta->next->flags &= ~CF_READY;
1598 SvRV_set (coro_current, next_sv);
1599
1600 LOCK;
1601 free_coro_mortal (aTHX);
1602 coro_mortal = prev_sv;
1603 UNLOCK;
1604}
821 1605
822static void 1606static void
823coro_enq (pTHX_ SV *sv) 1607prepare_cede (pTHX_ struct transfer_args *ta)
824{ 1608{
825 SV **xprio; 1609 api_ready (coro_current);
826 int prio; 1610 prepare_schedule (aTHX_ ta);
1611}
827 1612
828 if (SvTYPE (sv) != SVt_PVHV) 1613static int
829 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1614prepare_cede_notself (pTHX_ struct transfer_args *ta)
830 1615{
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834 prio = prio > PRIO_MAX ? PRIO_MAX
835 : prio < PRIO_MIN ? PRIO_MIN
836 : prio;
837
838 av_push (coro_ready [prio - PRIO_MIN], sv);
839 coro_nready++; 1616 if (coro_nready)
840}
841
842static SV *
843coro_deq (pTHX_ int min_prio)
844{
845 int prio = PRIO_MAX - PRIO_MIN;
846
847 min_prio -= PRIO_MIN;
848 if (min_prio < 0)
849 min_prio = 0;
850
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852 if (av_len (coro_ready[prio]) >= 0)
853 { 1617 {
854 coro_nready--; 1618 SV *prev = SvRV (coro_current);
855 return av_shift (coro_ready[prio]); 1619 prepare_schedule (aTHX_ ta);
1620 api_ready (prev);
1621 return 1;
856 } 1622 }
857 1623 else
858 return 0; 1624 return 0;
859}
860
861static void
862api_ready (SV *coro)
863{
864 dTHX;
865
866 if (SvROK (coro))
867 coro = SvRV (coro);
868
869 LOCK;
870 coro_enq (aTHX_ SvREFCNT_inc (coro));
871 UNLOCK;
872} 1625}
873 1626
874static void 1627static void
875api_schedule (void) 1628api_schedule (void)
876{ 1629{
877 dTHX; 1630 dTHX;
1631 struct transfer_args ta;
878 1632
879 SV *prev, *next; 1633 prepare_schedule (aTHX_ &ta);
1634 TRANSFER (ta, 1);
1635}
880 1636
881 LOCK; 1637static int
1638api_cede (void)
1639{
1640 dTHX;
1641 struct transfer_args ta;
882 1642
883 prev = SvRV (GvSV (coro_current)); 1643 prepare_cede (aTHX_ &ta);
884 next = coro_deq (aTHX_ PRIO_MIN);
885 1644
886 if (!next) 1645 if (expect_true (ta.prev != ta.next))
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1646 {
1647 TRANSFER (ta, 1);
1648 return 1;
1649 }
1650 else
1651 return 0;
1652}
888 1653
889 /* free this only after the transfer */ 1654static int
890 coro_mortal = prev; 1655api_cede_notself (void)
891 SV_CORO (prev, "Coro::schedule"); 1656{
1657 dTHX;
1658 struct transfer_args ta;
892 1659
893 SvRV (GvSV (coro_current)) = next; 1660 if (prepare_cede_notself (aTHX_ &ta))
894 1661 {
895 SV_CORO (next, "Coro::schedule"); 1662 TRANSFER (ta, 1);
896 1663 return 1;
897 UNLOCK; 1664 }
898 1665 else
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1666 return 0;
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901} 1667}
902 1668
903static void 1669static void
904api_cede (void) 1670api_trace (SV *coro_sv, int flags)
905{ 1671{
906 dTHX; 1672 dTHX;
1673 struct coro *coro = SvSTATE (coro_sv);
907 1674
908 LOCK; 1675 if (flags & CC_TRACE)
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1676 {
910 UNLOCK; 1677 if (!coro->cctx)
1678 coro->cctx = cctx_new_run ();
1679 else if (!(coro->cctx->flags & CC_TRACE))
1680 croak ("cannot enable tracing on coroutine with custom stack");
911 1681
1682 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1683 }
1684 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1685 {
1686 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1687
1688 if (coro->flags & CF_RUNNING)
1689 PL_runops = RUNOPS_DEFAULT;
1690 else
1691 coro->slot->runops = RUNOPS_DEFAULT;
1692 }
1693}
1694
1695#if 0
1696static int
1697coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1698{
1699 AV *padlist;
1700 AV *av = (AV *)mg->mg_obj;
1701
1702 abort ();
1703
1704 return 0;
1705}
1706
1707static MGVTBL coro_gensub_vtbl = {
1708 0, 0, 0, 0,
1709 coro_gensub_free
1710};
1711#endif
1712
1713/*****************************************************************************/
1714/* PerlIO::cede */
1715
1716typedef struct
1717{
1718 PerlIOBuf base;
1719 NV next, every;
1720} PerlIOCede;
1721
1722static IV
1723PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1724{
1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726
1727 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1728 self->next = nvtime () + self->every;
1729
1730 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1731}
1732
1733static SV *
1734PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1735{
1736 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1737
1738 return newSVnv (self->every);
1739}
1740
1741static IV
1742PerlIOCede_flush (pTHX_ PerlIO *f)
1743{
1744 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1745 double now = nvtime ();
1746
1747 if (now >= self->next)
1748 {
912 api_schedule (); 1749 api_cede ();
913} 1750 self->next = now + self->every;
1751 }
914 1752
1753 return PerlIOBuf_flush (aTHX_ f);
1754}
1755
1756static PerlIO_funcs PerlIO_cede =
1757{
1758 sizeof(PerlIO_funcs),
1759 "cede",
1760 sizeof(PerlIOCede),
1761 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1762 PerlIOCede_pushed,
1763 PerlIOBuf_popped,
1764 PerlIOBuf_open,
1765 PerlIOBase_binmode,
1766 PerlIOCede_getarg,
1767 PerlIOBase_fileno,
1768 PerlIOBuf_dup,
1769 PerlIOBuf_read,
1770 PerlIOBuf_unread,
1771 PerlIOBuf_write,
1772 PerlIOBuf_seek,
1773 PerlIOBuf_tell,
1774 PerlIOBuf_close,
1775 PerlIOCede_flush,
1776 PerlIOBuf_fill,
1777 PerlIOBase_eof,
1778 PerlIOBase_error,
1779 PerlIOBase_clearerr,
1780 PerlIOBase_setlinebuf,
1781 PerlIOBuf_get_base,
1782 PerlIOBuf_bufsiz,
1783 PerlIOBuf_get_ptr,
1784 PerlIOBuf_get_cnt,
1785 PerlIOBuf_set_ptrcnt,
1786};
1787
1788
915MODULE = Coro::State PACKAGE = Coro::State 1789MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 1790
917PROTOTYPES: ENABLE 1791PROTOTYPES: DISABLE
918 1792
919BOOT: 1793BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 1794{
921#ifdef USE_ITHREADS 1795#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 1796 MUTEX_INIT (&coro_lock);
1797# if CORO_PTHREAD
1798 coro_thx = PERL_GET_CONTEXT;
1799# endif
923#endif 1800#endif
924 BOOT_PAGESIZE; 1801 BOOT_PAGESIZE;
925 1802
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1803 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1804 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1805
1806 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1807 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1808 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1809
1810 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1811 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1812 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1813
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1814 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 1815
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1816 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1817 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1818 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1819 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934 1820
935 main_mainstack = PL_mainstack; 1821 main_mainstack = PL_mainstack;
1822 main_top_env = PL_top_env;
936 1823
1824 while (main_top_env->je_prev)
1825 main_top_env = main_top_env->je_prev;
1826
937 coroapi.ver = CORO_API_VERSION; 1827 coroapi.ver = CORO_API_VERSION;
1828 coroapi.rev = CORO_API_REVISION;
938 coroapi.transfer = api_transfer; 1829 coroapi.transfer = api_transfer;
939}
940 1830
941Coro::State 1831 {
942_newprocess(args) 1832 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
943 SV * args 1833
944 PROTOTYPE: $ 1834 if (!svp) croak ("Time::HiRes is required");
1835 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1836
1837 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1838 }
1839
1840 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1841}
1842
1843SV *
1844new (char *klass, ...)
945 CODE: 1845 CODE:
946 Coro__State coro; 1846{
1847 struct coro *coro;
1848 MAGIC *mg;
1849 HV *hv;
1850 int i;
947 1851
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949 croak ("Coro::State::_newprocess expects an arrayref");
950
951 Newz (0, coro, 1, struct coro); 1852 Newz (0, coro, 1, struct coro);
1853 coro->args = newAV ();
1854 coro->flags = CF_NEW;
952 1855
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1856 if (coro_first) coro_first->prev = coro;
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1857 coro->next = coro_first;
955 /*coro->stack = 0;*/ 1858 coro_first = coro;
956 1859
957 /* same as JMPENV_BOOTSTRAP */ 1860 coro->hv = hv = newHV ();
958 /* we might be able to recycle start_env, but safe is safe */ 1861 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
959 /*Zero (&coro->start_env, 1, JMPENV);*/ 1862 mg->mg_flags |= MGf_DUP;
960 coro->start_env.je_ret = -1; 1863 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961 coro->start_env.je_mustcatch = TRUE;
962 1864
963 RETVAL = coro; 1865 av_extend (coro->args, items - 1);
1866 for (i = 1; i < items; i++)
1867 av_push (coro->args, newSVsv (ST (i)));
1868}
964 OUTPUT: 1869 OUTPUT:
965 RETVAL 1870 RETVAL
966 1871
1872# these not obviously related functions are all rolled into the same xs
1873# function to increase chances that they all will call transfer with the same
1874# stack offset
967void 1875void
968transfer(prev, next, flags) 1876_set_stacklevel (...)
969 SV *prev 1877 ALIAS:
970 SV *next 1878 Coro::State::transfer = 1
971 int flags 1879 Coro::schedule = 2
972 PROTOTYPE: @ 1880 Coro::cede = 3
1881 Coro::cede_notself = 4
973 CODE: 1882 CODE:
1883{
1884 struct transfer_args ta;
1885
974 PUTBACK; 1886 PUTBACK;
975 SV_CORO (next, "Coro::transfer"); 1887 switch (ix)
976 SV_CORO (prev, "Coro::transfer"); 1888 {
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1889 case 0:
1890 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1891 ta.next = 0;
1892 break;
1893
1894 case 1:
1895 if (items != 2)
1896 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1897
1898 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1899 break;
1900
1901 case 2:
1902 prepare_schedule (aTHX_ &ta);
1903 break;
1904
1905 case 3:
1906 prepare_cede (aTHX_ &ta);
1907 break;
1908
1909 case 4:
1910 if (!prepare_cede_notself (aTHX_ &ta))
1911 XSRETURN_EMPTY;
1912
1913 break;
1914 }
978 SPAGAIN; 1915 SPAGAIN;
979 1916
1917 BARRIER;
1918 PUTBACK;
1919 TRANSFER (ta, 0);
1920 SPAGAIN; /* might be the sp of a different coroutine now */
1921 /* be extra careful not to ever do anything after TRANSFER */
1922}
1923
1924bool
1925_destroy (SV *coro_sv)
1926 CODE:
1927 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1928 OUTPUT:
1929 RETVAL
1930
980void 1931void
981DESTROY(coro)
982 Coro::State coro
983 CODE:
984
985 if (coro->mainstack && coro->mainstack != main_mainstack)
986 {
987 struct coro temp;
988
989 PUTBACK;
990 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991 LOAD (aTHX_ coro);
992 SPAGAIN;
993
994 destroy_stacks (aTHX);
995
996 LOAD ((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
998
999 coro->mainstack = 0;
1000 }
1001
1002 deallocate_stack (coro);
1003 SvREFCNT_dec (coro->args);
1004 Safefree (coro);
1005
1006void
1007_exit(code) 1932_exit (int code)
1008 int code
1009 PROTOTYPE: $ 1933 PROTOTYPE: $
1010 CODE: 1934 CODE:
1011 _exit (code); 1935 _exit (code);
1012 1936
1013MODULE = Coro::State PACKAGE = Coro::Cont 1937int
1938cctx_stacksize (int new_stacksize = 0)
1939 CODE:
1940 RETVAL = cctx_stacksize;
1941 if (new_stacksize)
1942 {
1943 cctx_stacksize = new_stacksize;
1944 ++cctx_gen;
1945 }
1946 OUTPUT:
1947 RETVAL
1014 1948
1015# this is slightly dirty (should expose a c-level api) 1949int
1950cctx_max_idle (int max_idle = 0)
1951 CODE:
1952 RETVAL = cctx_max_idle;
1953 if (max_idle > 1)
1954 cctx_max_idle = max_idle;
1955 OUTPUT:
1956 RETVAL
1957
1958int
1959cctx_count ()
1960 CODE:
1961 RETVAL = cctx_count;
1962 OUTPUT:
1963 RETVAL
1964
1965int
1966cctx_idle ()
1967 CODE:
1968 RETVAL = cctx_idle;
1969 OUTPUT:
1970 RETVAL
1016 1971
1017void 1972void
1018yield(...) 1973list ()
1019 PROTOTYPE: @ 1974 PPCODE:
1975{
1976 struct coro *coro;
1977 for (coro = coro_first; coro; coro = coro->next)
1978 if (coro->hv)
1979 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1980}
1981
1982void
1983call (Coro::State coro, SV *coderef)
1984 ALIAS:
1985 eval = 1
1986 CODE:
1987{
1988 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1989 {
1990 struct coro temp;
1991
1992 if (!(coro->flags & CF_RUNNING))
1993 {
1994 PUTBACK;
1995 save_perl (aTHX_ &temp);
1996 load_perl (aTHX_ coro);
1997 }
1998
1999 {
2000 dSP;
2001 ENTER;
2002 SAVETMPS;
2003 PUTBACK;
2004 PUSHSTACK;
2005 PUSHMARK (SP);
2006
2007 if (ix)
2008 eval_sv (coderef, 0);
2009 else
2010 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2011
2012 POPSTACK;
2013 SPAGAIN;
2014 FREETMPS;
2015 LEAVE;
2016 PUTBACK;
2017 }
2018
2019 if (!(coro->flags & CF_RUNNING))
2020 {
2021 save_perl (aTHX_ coro);
2022 load_perl (aTHX_ &temp);
2023 SPAGAIN;
2024 }
2025 }
2026}
2027
2028SV *
2029is_ready (Coro::State coro)
2030 PROTOTYPE: $
2031 ALIAS:
2032 is_ready = CF_READY
2033 is_running = CF_RUNNING
2034 is_new = CF_NEW
2035 is_destroyed = CF_DESTROYED
2036 CODE:
2037 RETVAL = boolSV (coro->flags & ix);
2038 OUTPUT:
2039 RETVAL
2040
2041void
2042api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2043
2044SV *
2045has_cctx (Coro::State coro)
2046 PROTOTYPE: $
2047 CODE:
2048 RETVAL = boolSV (!!coro->cctx);
2049 OUTPUT:
2050 RETVAL
2051
2052int
2053is_traced (Coro::State coro)
2054 PROTOTYPE: $
2055 CODE:
2056 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2057 OUTPUT:
2058 RETVAL
2059
2060UV
2061rss (Coro::State coro)
2062 PROTOTYPE: $
2063 ALIAS:
2064 usecount = 1
1020 CODE: 2065 CODE:
1021 SV *yieldstack; 2066 switch (ix)
1022 SV *sv; 2067 {
1023 AV *defav = GvAV (PL_defgv); 2068 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1024 struct coro *prev, *next; 2069 case 1: RETVAL = coro->usecount; break;
1025
1026 yieldstack = *hv_fetch (
1027 (HV *)SvRV (GvSV (coro_current)),
1028 "yieldstack", sizeof ("yieldstack") - 1,
1029 0 2070 }
2071 OUTPUT:
2072 RETVAL
2073
2074void
2075force_cctx ()
2076 CODE:
2077 struct coro *coro = SvSTATE (coro_current);
2078 coro->cctx->idle_sp = 0;
2079
2080void
2081swap_defsv (Coro::State self)
2082 PROTOTYPE: $
2083 ALIAS:
2084 swap_defav = 1
2085 CODE:
2086 if (!self->slot)
2087 croak ("cannot swap state with coroutine that has no saved state");
2088 else
1030 ); 2089 {
2090 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2091 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1031 2092
1032 /* set up @_ -- ugly */ 2093 SV *tmp = *src; *src = *dst; *dst = tmp;
1033 av_clear (defav); 2094 }
1034 av_fill (defav, items - 1);
1035 while (items--)
1036 av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038 sv = av_pop ((AV *)SvRV (yieldstack));
1039 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041 SvREFCNT_dec (sv);
1042
1043 transfer (aTHX_ prev, next, 0);
1044 2095
1045MODULE = Coro::State PACKAGE = Coro 2096MODULE = Coro::State PACKAGE = Coro
1046 2097
1047# this is slightly dirty (should expose a c-level api)
1048
1049BOOT: 2098BOOT:
1050{ 2099{
1051 int i; 2100 int i;
2101
2102 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2103 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2104 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2105
2106 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2107 SvREADONLY_on (coro_current);
2108
1052 HV *stash = gv_stashpv ("Coro", TRUE); 2109 coro_stash = gv_stashpv ("Coro", TRUE);
1053 2110
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2111 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2112 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2113 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2114 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2115 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2116 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063 2117
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2118 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV (); 2119 coro_ready[i] = newAV ();
1066 2120
1067 { 2121 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 2122 SV *sv = perl_get_sv ("Coro::API", TRUE);
2123 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1069 2124
1070 coroapi.schedule = api_schedule; 2125 coroapi.schedule = api_schedule;
1071 coroapi.cede = api_cede; 2126 coroapi.cede = api_cede;
2127 coroapi.cede_notself = api_cede_notself;
1072 coroapi.ready = api_ready; 2128 coroapi.ready = api_ready;
2129 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 2130 coroapi.nready = &coro_nready;
1074 coroapi.current = coro_current; 2131 coroapi.current = coro_current;
1075 2132
1076 GCoroAPI = &coroapi; 2133 GCoroAPI = &coroapi;
1077 sv_setiv(sv, (IV)&coroapi); 2134 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on(sv); 2135 SvREADONLY_on (sv);
1079 } 2136 }
1080} 2137}
1081 2138
1082#if !PERL_MICRO
1083
1084void 2139void
1085ready(self) 2140_set_current (SV *current)
1086 SV * self
1087 PROTOTYPE: $ 2141 PROTOTYPE: $
1088 CODE: 2142 CODE:
1089 api_ready (self); 2143 SvREFCNT_dec (SvRV (coro_current));
2144 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1090 2145
1091#endif 2146void
2147_set_readyhook (SV *hook)
2148 PROTOTYPE: $
2149 CODE:
2150 LOCK;
2151 SvREFCNT_dec (coro_readyhook);
2152 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2153 UNLOCK;
1092 2154
1093int 2155int
2156prio (Coro::State coro, int newprio = 0)
2157 ALIAS:
2158 nice = 1
2159 CODE:
2160{
2161 RETVAL = coro->prio;
2162
2163 if (items > 1)
2164 {
2165 if (ix)
2166 newprio = coro->prio - newprio;
2167
2168 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2169 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2170
2171 coro->prio = newprio;
2172 }
2173}
2174 OUTPUT:
2175 RETVAL
2176
2177SV *
2178ready (SV *self)
2179 PROTOTYPE: $
2180 CODE:
2181 RETVAL = boolSV (api_ready (self));
2182 OUTPUT:
2183 RETVAL
2184
2185int
1094nready(...) 2186nready (...)
1095 PROTOTYPE: 2187 PROTOTYPE:
1096 CODE: 2188 CODE:
1097 RETVAL = coro_nready; 2189 RETVAL = coro_nready;
1098 OUTPUT: 2190 OUTPUT:
1099 RETVAL 2191 RETVAL
1100 2192
1101void 2193void
1102schedule(...) 2194throw (Coro::State self, SV *throw = &PL_sv_undef)
1103 PROTOTYPE: 2195 PROTOTYPE: $;$
2196 CODE:
2197 SvREFCNT_dec (self->throw);
2198 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2199
2200# for async_pool speedup
2201void
2202_pool_1 (SV *cb)
1104 CODE: 2203 CODE:
1105 api_schedule (); 2204{
2205 struct coro *coro = SvSTATE (coro_current);
2206 HV *hv = (HV *)SvRV (coro_current);
2207 AV *defav = GvAV (PL_defgv);
2208 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2209 AV *invoke_av;
2210 int i, len;
2211
2212 if (!invoke)
2213 {
2214 SV *old = PL_diehook;
2215 PL_diehook = 0;
2216 SvREFCNT_dec (old);
2217 croak ("\3async_pool terminate\2\n");
2218 }
2219
2220 SvREFCNT_dec (coro->saved_deffh);
2221 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2222
2223 hv_store (hv, "desc", sizeof ("desc") - 1,
2224 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2225
2226 invoke_av = (AV *)SvRV (invoke);
2227 len = av_len (invoke_av);
2228
2229 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2230
2231 if (len > 0)
2232 {
2233 av_fill (defav, len - 1);
2234 for (i = 0; i < len; ++i)
2235 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2236 }
2237
2238 SvREFCNT_dec (invoke);
2239}
1106 2240
1107void 2241void
1108cede(...) 2242_pool_2 (SV *cb)
1109 PROTOTYPE:
1110 CODE: 2243 CODE:
1111 api_cede (); 2244{
2245 struct coro *coro = SvSTATE (coro_current);
1112 2246
1113# and these are hacks 2247 sv_setsv (cb, &PL_sv_undef);
2248
2249 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2250 coro->saved_deffh = 0;
2251
2252 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2253 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2254 {
2255 SV *old = PL_diehook;
2256 PL_diehook = 0;
2257 SvREFCNT_dec (old);
2258 croak ("\3async_pool terminate\2\n");
2259 }
2260
2261 av_clear (GvAV (PL_defgv));
2262 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2263 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2264
2265 coro->prio = 0;
2266
2267 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2268 api_trace (coro_current, 0);
2269
2270 av_push (av_async_pool, newSVsv (coro_current));
2271}
2272
2273#if 0
2274
2275void
2276_generator_call (...)
2277 PROTOTYPE: @
2278 PPCODE:
2279 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2280 xxxx
2281 abort ();
2282
1114SV * 2283SV *
1115_aio_get_state () 2284gensub (SV *sub, ...)
1116 CODE: 2285 PROTOTYPE: &;@
2286 CODE:
1117{ 2287{
1118 struct { 2288 struct coro *coro;
1119 int errorno; 2289 MAGIC *mg;
1120 int laststype; 2290 CV *xcv;
1121 int laststatval; 2291 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1122 Stat_t statcache; 2292 int i;
1123 } data;
1124 2293
1125 data.errorno = errno; 2294 CvGV (ncv) = CvGV (cv);
1126 data.laststype = PL_laststype; 2295 CvFILE (ncv) = CvFILE (cv);
1127 data.laststatval = PL_laststatval;
1128 data.statcache = PL_statcache;
1129 2296
1130 RETVAL = newSVpvn ((char *)&data, sizeof data); 2297 Newz (0, coro, 1, struct coro);
2298 coro->args = newAV ();
2299 coro->flags = CF_NEW;
2300
2301 av_extend (coro->args, items - 1);
2302 for (i = 1; i < items; i++)
2303 av_push (coro->args, newSVsv (ST (i)));
2304
2305 CvISXSUB_on (ncv);
2306 CvXSUBANY (ncv).any_ptr = (void *)coro;
2307
2308 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2309
2310 CvXSUB (ncv) = CvXSUB (xcv);
2311 CvANON_on (ncv);
2312
2313 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2314 RETVAL = newRV_noinc ((SV *)ncv);
1131} 2315}
1132 OUTPUT: 2316 OUTPUT:
1133 RETVAL 2317 RETVAL
1134 2318
2319#endif
2320
2321
2322MODULE = Coro::State PACKAGE = Coro::AIO
2323
1135void 2324void
1136_aio_set_state (char *data_) 2325_get_state (SV *self)
2326 PPCODE:
2327{
2328 AV *defav = GvAV (PL_defgv);
2329 AV *av = newAV ();
2330 int i;
2331 SV *data_sv = newSV (sizeof (struct io_state));
2332 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2333 SvCUR_set (data_sv, sizeof (struct io_state));
2334 SvPOK_only (data_sv);
2335
2336 data->errorno = errno;
2337 data->laststype = PL_laststype;
2338 data->laststatval = PL_laststatval;
2339 data->statcache = PL_statcache;
2340
2341 av_extend (av, AvFILLp (defav) + 1 + 1);
2342
2343 for (i = 0; i <= AvFILLp (defav); ++i)
2344 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2345
2346 av_push (av, data_sv);
2347
2348 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2349
2350 api_ready (self);
2351}
2352
2353void
2354_set_state (SV *state)
1137 PROTOTYPE: $ 2355 PROTOTYPE: $
2356 PPCODE:
2357{
2358 AV *av = (AV *)SvRV (state);
2359 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2360 int i;
2361
2362 errno = data->errorno;
2363 PL_laststype = data->laststype;
2364 PL_laststatval = data->laststatval;
2365 PL_statcache = data->statcache;
2366
2367 EXTEND (SP, AvFILLp (av));
2368 for (i = 0; i < AvFILLp (av); ++i)
2369 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2370}
2371
2372
2373MODULE = Coro::State PACKAGE = Coro::AnyEvent
2374
2375BOOT:
2376 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2377
2378SV *
2379_schedule (...)
2380 PROTOTYPE: @
1138 CODE: 2381 CODE:
1139{ 2382{
1140 struct { 2383 static int incede;
1141 int errorno;
1142 int laststype;
1143 int laststatval;
1144 Stat_t statcache;
1145 } *data = (void *)data_;
1146 2384
1147 errno = data->errorno; 2385 api_cede_notself ();
1148 PL_laststype = data->laststype; 2386
1149 PL_laststatval = data->laststatval; 2387 ++incede;
1150 PL_statcache = data->statcache; 2388 while (coro_nready >= incede && api_cede ())
2389 ;
2390
2391 sv_setsv (sv_activity, &PL_sv_undef);
2392 if (coro_nready >= incede)
2393 {
2394 PUSHMARK (SP);
2395 PUTBACK;
2396 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2397 SPAGAIN;
2398 }
2399
2400 --incede;
1151} 2401}
2402
2403
2404MODULE = Coro::State PACKAGE = PerlIO::cede
2405
2406BOOT:
2407 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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