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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.256 by root, Sat Nov 8 13:32:18 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 optional C context */ 256 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 257 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 258
110 /* optionally saved, might be zero */ 259 /* process data */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 260 AV *mainstack;
123 SV **stack_sp; 261 perl_slots *slot; /* basically the saved sp */
124 OP *op; 262
125 SV **curpad; 263 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 264 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 265 int flags; /* CF_ flags */
128 SV **stack_base; 266 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 267
130 SV **tmps_stack; 268 /* statistics */
131 I32 tmps_floor; 269 int usecount; /* number of transfers to this coro */
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 270
150 /* coro process data */ 271 /* coro process data */
151 int prio; 272 int prio;
273 SV *throw; /* exception to be thrown */
152 274
153 /* data associated with this coroutine (initial args) */ 275 /* async_pool */
154 AV *args; 276 SV *saved_deffh;
155 int refcnt; 277
278 /* linked list */
279 struct coro *next, *prev;
156}; 280};
157 281
158typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
160 284
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
161static AV * 333static AV *
162coro_clone_padlist (pTHX_ CV *cv) 334coro_clone_padlist (pTHX_ CV *cv)
163{ 335{
164 AV *padlist = CvPADLIST (cv); 336 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 337 AV *newpadlist, *newpad;
166 338
167 newpadlist = newAV (); 339 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 340 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 341#if PERL_VERSION_ATLEAST (5,10,0)
342 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
343#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 344 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 345#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 346 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 347 --AvFILLp (padlist);
176 348
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 349 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
178 av_store (newpadlist, 1, (SV *)newpad); 350 av_store (newpadlist, 1, (SV *)newpad);
179 351
180 return newpadlist; 352 return newpadlist;
181} 353}
182 354
… …
212 384
213 /* casting is fun. */ 385 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 386 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 387 free_padlist (aTHX_ padlist);
216 388
217 SvREFCNT_dec (av); 389 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 390
219 return 0; 391 return 0;
220} 392}
221 393
222#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
223 396
224static 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))
225 437
226/* the next two functions merely cache the padlists */ 438/* the next two functions merely cache the padlists */
227static void 439static void
228get_padlist (pTHX_ CV *cv) 440get_padlist (pTHX_ CV *cv)
229{ 441{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 442 MAGIC *mg = CORO_MAGIC_cv (cv);
443 AV *av;
231 444
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 445 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 446 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 447 else
235 { 448 {
236#if 0 449#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 450 /* this is probably cleaner? but also slower! */
451 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 452 CV *cp = Perl_cv_clone (cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 453 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 454 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 455 SvREFCNT_dec (cp);
242#else 456#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 457 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
246} 460}
247 461
248static void 462static void
249put_padlist (pTHX_ CV *cv) 463put_padlist (pTHX_ CV *cv)
250{ 464{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 465 MAGIC *mg = CORO_MAGIC_cv (cv);
466 AV *av;
252 467
253 if (!mg) 468 if (expect_false (!mg))
254 { 469 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 470
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 471 av = (AV *)mg->mg_obj;
262}
263 472
264#define SB do { 473 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 474 av_extend (av, AvMAX (av) + 1);
266 475
267#define LOAD(state) load_state(aTHX_ (state)); 476 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 477}
269 478
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 479/** load & save, init *******************************************************/
271 480
272static void 481static void
273load_state(pTHX_ Coro__State c) 482load_perl (pTHX_ Coro__State c)
274{ 483{
275 PL_dowarn = c->dowarn; 484 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 485 c->slot = 0;
277 486
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 487 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 PL_top_env = c->top_env;
309 488
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 489 GvSV (PL_defgv) = slot->defsv;
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 490 GvAV (PL_defgv) = slot->defav;
312 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
313 497
314 { 498 {
315 dSP; 499 dSP;
500
316 CV *cv; 501 CV *cv;
317 502
318 /* now do the ugly restore mess */ 503 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 504 while (expect_true (cv = (CV *)POPs))
320 { 505 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 506 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 507 CvDEPTH (cv) = PTR2IV (POPs);
327 } 508 CvPADLIST (cv) = (AV *)POPs;
328
329 ++CvDEPTH(cv);
330 } 509 }
331 510
332 PUTBACK; 511 PUTBACK;
333 } 512 }
334} 513}
335 514
336static void 515static void
337save_state(pTHX_ Coro__State c, int flags) 516save_perl (pTHX_ Coro__State c)
338{ 517{
339 { 518 {
340 dSP; 519 dSP;
341 I32 cxix = cxstack_ix; 520 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 521 PERL_CONTEXT *ccstk = cxstack;
… …
345 /* 524 /*
346 * 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
347 * (and reinitialize) all cv's in the whole callchain :( 526 * (and reinitialize) all cv's in the whole callchain :(
348 */ 527 */
349 528
350 PUSHs (Nullsv); 529 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 530 /* this loop was inspired by pp_caller */
352 for (;;) 531 for (;;)
353 { 532 {
354 while (cxix >= 0) 533 while (expect_true (cxix >= 0))
355 { 534 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 535 PERL_CONTEXT *cx = &ccstk[cxix--];
357 536
358 if (CxTYPE(cx) == CXt_SUB) 537 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
359 { 538 {
360 CV *cv = cx->blk_sub.cv; 539 CV *cv = cx->blk_sub.cv;
540
361 if (CvDEPTH(cv)) 541 if (expect_true (CvDEPTH (cv)))
362 { 542 {
363 EXTEND (SP, CvDEPTH(cv)*2); 543 EXTEND (SP, 3);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 544 PUSHs ((SV *)CvPADLIST (cv));
545 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 546 PUSHs ((SV *)cv);
374 547
548 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 549 get_padlist (aTHX_ cv);
376 } 550 }
377 } 551 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 552 }
387 553
388 if (top_si->si_type == PERLSI_MAIN) 554 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 555 break;
390 556
391 top_si = top_si->si_prev; 557 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 558 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 559 cxix = top_si->si_cxix;
394 } 560 }
395 561
396 PUTBACK; 562 PUTBACK;
397 } 563 }
398 564
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 565 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 566 /* we manually unroll here, as usually 2 slots is enough */
401 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 */
402 576
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack; 577 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 578
410 c->op = PL_op; 579 {
411 c->curpad = PL_curpad; 580 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 581
413 c->compcv = PL_compcv; 582 slot->defav = GvAV (PL_defgv);
414 c->stack_base = PL_stack_base; 583 slot->defsv = DEFSV;
415 c->stack_max = PL_stack_max; 584 slot->errsv = ERRSV;
416 c->tmps_stack = PL_tmps_stack; 585 slot->irsgv = GvSV (irsgv);
417 c->tmps_floor = PL_tmps_floor; 586
418 c->tmps_ix = PL_tmps_ix; 587 #define VAR(name,type) slot->name = PL_ ## name;
419 c->tmps_max = PL_tmps_max; 588 # include "state.h"
420 c->markstack = PL_markstack; 589 #undef VAR
421 c->markstack_ptr = PL_markstack_ptr; 590 }
422 c->markstack_max = PL_markstack_max;
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436 c->top_env = PL_top_env;
437} 591}
438 592
439/* 593/*
440 * allocate various perl stacks. This is an exact copy 594 * allocate various perl stacks. This is an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 595 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 596 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 597 * not usually need a lot of stackspace.
444 */ 598 */
599#if CORO_PREFER_PERL_FUNCTIONS
600# define coro_init_stacks init_stacks
601#else
445static void 602static void
446coro_init_stacks (pTHX) 603coro_init_stacks (pTHX)
447{ 604{
448 LOCK; 605 PL_curstackinfo = new_stackinfo(32, 8);
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN; 606 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 607 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 608 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 609
455 PL_stack_base = AvARRAY(PL_curstack); 610 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 611 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 612 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 613
459 New(50,PL_tmps_stack,96,SV*); 614 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 615 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 616 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 617 PL_tmps_max = 32;
463 618
464 New(54,PL_markstack,16,I32); 619 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 620 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 621 PL_markstack_max = PL_markstack + 16;
467 622
468#ifdef SET_MARK_OFFSET 623#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 624 SET_MARK_OFFSET;
470#endif 625#endif
471 626
472 New(54,PL_scopestack,16,I32); 627 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 628 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 629 PL_scopestack_max = 8;
475 630
476 New(54,PL_savestack,96,ANY); 631 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 632 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 633 PL_savestack_max = 24;
479 634
480#if PERL_VERSION < 9 635#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 636 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 637 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 638 PL_retstack_max = 4;
484#endif 639#endif
485
486 UNLOCK;
487} 640}
641#endif
488 642
489/* 643/*
490 * destroy the stacks, the callchain etc... 644 * destroy the stacks, the callchain etc...
491 */ 645 */
492static void 646static void
493destroy_stacks(pTHX) 647coro_destruct_stacks (pTHX)
494{ 648{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next) 649 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 650 PL_curstackinfo = PL_curstackinfo->si_next;
508 651
509 while (PL_curstackinfo) 652 while (PL_curstackinfo)
510 { 653 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 654 PERL_SI *p = PL_curstackinfo->si_prev;
512 655
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 656 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 657 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 658
525 Safefree (PL_curstackinfo->si_cxstack); 659 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 660 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 661 PL_curstackinfo = p;
528 } 662 }
529 663
530 Safefree (PL_tmps_stack); 664 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 665 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 666 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 667 Safefree (PL_savestack);
534#if PERL_VERSION < 9 668#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 669 Safefree (PL_retstack);
536#endif 670#endif
537} 671}
538 672
539static void 673static size_t
540allocate_stack (Coro__State ctx, int alloc) 674coro_rss (pTHX_ struct coro *coro)
541{ 675{
542 coro_stack *stack; 676 size_t rss = sizeof (*coro);
543 677
544 New (0, stack, 1, coro_stack); 678 if (coro->mainstack)
545
546 stack->refcnt = 1;
547 stack->usecnt = 1;
548 stack->gencnt = ctx->gencnt = 0;
549
550 if (alloc)
551 { 679 {
552#if HAVE_MMAP 680 perl_slots tmp_slot;
553 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 681 perl_slots *slot;
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 682
555 if (stack->sptr != (void *)-1) 683 if (coro->flags & CF_RUNNING)
556 { 684 {
557# if STACKGUARD 685 slot = &tmp_slot;
558 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 686
559# endif 687 #define VAR(name,type) slot->name = PL_ ## name;
688 # include "state.h"
689 #undef VAR
560 } 690 }
561 else 691 else
562#endif 692 slot = coro->slot;
693
694 if (slot)
563 { 695 {
564 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 696 rss += sizeof (slot->curstackinfo);
565 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
566 } 707 }
567 } 708 }
568 else
569 stack->sptr = 0;
570 709
571 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;
572} 803}
573 804
574static void 805static void
575deallocate_stack (Coro__State ctx) 806coro_setup (pTHX_ struct coro *coro)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
583 if (!--stack->refcnt)
584 {
585#ifdef HAVE_MMAP
586 if (stack->ssize > 0 && stack->sptr)
587 munmap (stack->sptr, stack->ssize);
588 else
589#endif
590 Safefree (stack->sptr);
591
592 Safefree (stack);
593 }
594 else if (ctx->gencnt == stack->gencnt)
595 --stack->usecnt;
596 }
597}
598
599static void
600setup_coro (void *arg)
601{ 807{
602 /* 808 /*
603 * emulate part of the perl startup here. 809 * emulate part of the perl startup here.
604 */ 810 */
605 dTHX;
606 dSP;
607 Coro__State ctx = (Coro__State)arg;
608 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610 coro_init_stacks (aTHX); 811 coro_init_stacks (aTHX);
611 /*PL_curcop = 0;*/ 812
612 /*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));
613 SvREFCNT_dec (GvAV (PL_defgv)); 882 SvREFCNT_dec (GvAV (PL_defgv));
614 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));
615 887
616 SPAGAIN; 888 SvREFCNT_dec (PL_diehook);
889 SvREFCNT_dec (PL_warnhook);
890
891 SvREFCNT_dec (coro->saved_deffh);
892 SvREFCNT_dec (coro->throw);
617 893
618 if (ctx->stack) 894 coro_destruct_stacks (aTHX);
619 {
620 ctx->cursp = 0;
621
622 PUSHMARK(SP);
623 PUTBACK;
624 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
625
626 if (SvTRUE (ERRSV))
627 croak (NULL);
628 else
629 croak ("FATAL: CCTXT coroutine returned!");
630 }
631 else
632 {
633 UNOP myop;
634
635 Zero(&myop, 1, UNOP);
636 myop.op_next = Nullop;
637 myop.op_flags = OPf_WANT_VOID;
638
639 PL_op = (OP *)&myop;
640
641 PUSHMARK(SP);
642 XPUSHs (sub_init);
643 /*
644 * the next line is slightly wrong, as PL_op->op_next
645 * is actually being executed so we skip the first op.
646 * that doesn't matter, though, since it is only
647 * pp_nextstate and we never return...
648 * ah yes, and I don't care anyways ;)
649 */
650 PUTBACK;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653
654 ENTER; /* necessary e.g. for dounwind */
655 }
656} 895}
657 896
658static void 897static void
659continue_coro (void *arg) 898free_coro_mortal (pTHX)
660{ 899{
661 /* 900 if (expect_true (coro_mortal))
662 * this is a _very_ stripped down perl interpreter ;) 901 {
663 */ 902 SvREFCNT_dec (coro_mortal);
664 dTHX; 903 coro_mortal = 0;
665 Coro__State ctx = (Coro__State)arg;
666
667 PL_top_env = &PL_start_env;
668
669 ctx->cursp = 0;
670 PL_op = PL_op->op_next;
671 CALLRUNOPS(aTHX);
672
673 abort ();
674}
675
676/* never call directly, always through the coro_state_transfer global variable */
677static void
678transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSTACKLEVEL;
681
682 if (prev != next)
683 { 904 }
684 /* has this coro been created yet? */ 905}
685 if (next->mainstack) 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)
686 { 920 {
687 LOCK; 921 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
688 SAVE (prev, flags);
689 LOAD (next);
690 UNLOCK;
691
692 /* mark this state as in-use */
693 next->mainstack = 0;
694 next->tmps_ix = -2;
695
696 /* stacklevel changed? if yes, grab the stack for us! */
697 if (flags & TRANSFER_SAVE_CCTXT)
698 { 922 {
699 if (!prev->stack) 923 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
700 allocate_stack (prev, 0); 924 SV **bot, **top;
701 else if (prev->cursp != stacklevel 925 AV *av = newAV (); /* return values */
702 && 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)
703 { 965 {
704 prev->gencnt = ++prev->stack->gencnt; 966 SV **cb;
705 prev->stack->usecnt = 1;
706 }
707 967
708 /* has our stack been invalidated? */ 968 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
709 if (next->stack && next->stack->gencnt != next->gencnt)
710 { 969 {
711 deallocate_stack (next); 970 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
712 allocate_stack (next, 1); 971
713 coro_create (&(next->stack->cctx), 972 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
714 continue_coro, (void *)next, 973 {
715 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;
716 } 1000 }
717 1001
718 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1002 if (cctx->flags & CC_TRACE_LINE)
719 prev->cursp = stacklevel;
720 /* don't add any code here */
721 }
722 else
723 next->cursp = stacklevel;
724 }
725 else if (next->tmps_ix == -2)
726 croak ("tried to transfer to running coroutine");
727 else
728 {
729 LOCK;
730 SAVE (prev, -1); /* first get rid of the old state */
731 UNLOCK;
732
733 /* create the coroutine for the first time */
734 if (flags & TRANSFER_SAVE_CCTXT)
735 {
736 if (!prev->stack)
737 allocate_stack (prev, 0);
738
739 /* the new coroutine starts with start_env again */
740 PL_top_env = &PL_start_env;
741
742 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743 { 1003 {
744 setup_coro (next); 1004 dSP;
745 next->cursp = stacklevel;
746 1005
747 prev->stack->refcnt++; 1006 PL_runops = RUNOPS_DEFAULT;
748 prev->stack->usecnt++; 1007 ENTER;
749 next->stack = prev->stack; 1008 SAVETMPS;
750 next->gencnt = prev->gencnt; 1009 EXTEND (SP, 3);
1010 PL_runops = RUNOPS_DEFAULT;
1011 PUSHMARK (SP);
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;
751 } 1021 }
752 else
753 {
754 assert (!next->stack);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 setup_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760 prev->cursp = stacklevel;
761 /* don't add any code here */
762 } 1022 }
763 } 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 void *stack_start;
1103 size_t stack_size;
1104
1105 ++cctx_count;
1106 Newz (0, cctx, 1, coro_cctx);
1107
1108 cctx->gen = cctx_gen;
1109
1110#if HAVE_MMAP
1111 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1112 /* mmap supposedly does allocate-on-write for us */
1113 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1114
1115 if (cctx->sptr != (void *)-1)
1116 {
1117# if CORO_STACKGUARD
1118 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1119# endif
1120 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1121 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122 cctx->flags |= CC_MAPPED;
1123 }
1124 else
1125#endif
1126 {
1127 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128 New (0, cctx->sptr, cctx_stacksize, long);
1129
1130 if (!cctx->sptr)
1131 {
1132 perror ("FATAL: unable to allocate stack for coroutine");
1133 _exit (EXIT_FAILURE);
1134 }
1135
1136 stack_start = cctx->sptr;
1137 stack_size = cctx->ssize;
1138 }
1139
1140 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1141 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1142
1143 return cctx;
1144}
1145
1146static void
1147cctx_destroy (coro_cctx *cctx)
1148{
1149 if (!cctx)
1150 return;
1151
1152 --cctx_count;
1153 coro_destroy (&cctx->cctx);
1154
1155 /* coro_transfer creates new, empty cctx's */
1156 if (cctx->sptr)
1157 {
1158#if CORO_USE_VALGRIND
1159 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1160#endif
1161
1162#if HAVE_MMAP
1163 if (cctx->flags & CC_MAPPED)
1164 munmap (cctx->sptr, cctx->ssize);
764 else 1165 else
1166#endif
1167 Safefree (cctx->sptr);
1168 }
1169
1170 Safefree (cctx);
1171}
1172
1173/* wether this cctx should be destructed */
1174#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1175
1176static coro_cctx *
1177cctx_get (pTHX)
1178{
1179 while (expect_true (cctx_first))
1180 {
1181 coro_cctx *cctx = cctx_first;
1182 cctx_first = cctx->next;
1183 --cctx_idle;
1184
1185 if (expect_true (!CCTX_EXPIRED (cctx)))
1186 return cctx;
1187
1188 cctx_destroy (cctx);
1189 }
1190
1191 return cctx_new ();
1192}
1193
1194static void
1195cctx_put (coro_cctx *cctx)
1196{
1197 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1198
1199 /* free another cctx if overlimit */
1200 if (expect_false (cctx_idle >= cctx_max_idle))
1201 {
1202 coro_cctx *first = cctx_first;
1203 cctx_first = first->next;
1204 --cctx_idle;
1205
1206 cctx_destroy (first);
1207 }
1208
1209 ++cctx_idle;
1210 cctx->next = cctx_first;
1211 cctx_first = cctx;
1212}
1213
1214/** coroutine switching *****************************************************/
1215
1216static void
1217transfer_check (pTHX_ struct coro *prev, struct coro *next)
1218{
1219 if (expect_true (prev != next))
1220 {
1221 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1222 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1223
1224 if (expect_false (next->flags & CF_RUNNING))
1225 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1226
1227 if (expect_false (next->flags & CF_DESTROYED))
1228 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1229
1230#if !PERL_VERSION_ATLEAST (5,10,0)
1231 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1232 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1233#endif
1234 }
1235}
1236
1237/* always use the TRANSFER macro */
1238static void NOINLINE
1239transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1240{
1241 dSTACKLEVEL;
1242
1243 /* sometimes transfer is only called to set idle_sp */
1244 if (expect_false (!next))
1245 {
1246 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1247 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1248 }
1249 else if (expect_true (prev != next))
1250 {
1251 static volatile int has_throw;
1252 coro_cctx *prev__cctx;
1253
1254 if (expect_false (prev->flags & CF_NEW))
1255 {
1256 /* create a new empty/source context */
1257 ++cctx_count;
1258 New (0, prev->cctx, 1, coro_cctx);
1259 prev->cctx->sptr = 0;
1260 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1261
1262 prev->flags &= ~CF_NEW;
1263 prev->flags |= CF_RUNNING;
1264 }
1265
1266 prev->flags &= ~CF_RUNNING;
1267 next->flags |= CF_RUNNING;
1268
1269 LOCK;
1270
1271 /* first get rid of the old state */
1272 save_perl (aTHX_ prev);
1273
1274 if (expect_false (next->flags & CF_NEW))
1275 {
1276 /* need to start coroutine */
1277 next->flags &= ~CF_NEW;
1278 /* setup coroutine call */
1279 coro_setup (aTHX_ next);
1280 }
1281 else
1282 load_perl (aTHX_ next);
1283
1284 prev__cctx = prev->cctx;
1285
1286 /* possibly "free" the cctx */
1287 if (expect_true (
1288 prev__cctx->idle_sp == STACKLEVEL
1289 && !(prev__cctx->flags & CC_TRACE)
1290 && !force_cctx
1291 ))
1292 {
1293 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1294 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1295
1296 prev->cctx = 0;
1297
1298 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1299 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1300 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1301 if (!next->cctx)
1302 next->cctx = cctx_get (aTHX);
1303
1304 cctx_put (prev__cctx);
1305 }
1306
1307 ++next->usecount;
1308
1309 if (expect_true (!next->cctx))
1310 next->cctx = cctx_get (aTHX);
1311
1312 has_throw = !!next->throw;
1313
1314 if (expect_false (prev__cctx != next->cctx))
1315 {
1316 prev__cctx->top_env = PL_top_env;
1317 PL_top_env = next->cctx->top_env;
1318 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1319 }
1320
1321 free_coro_mortal (aTHX);
1322 UNLOCK;
1323
1324 if (expect_false (has_throw))
1325 {
1326 struct coro *coro = SvSTATE (coro_current);
1327
1328 if (coro->throw)
765 { 1329 {
1330 SV *exception = coro->throw;
1331 coro->throw = 0;
1332 sv_setsv (ERRSV, exception);
766 setup_coro (next); 1333 croak (0);
767 next->cursp = stacklevel;
768 } 1334 }
769 } 1335 }
770 } 1336 }
771
772 LOCK;
773 if (coro_mortal)
774 {
775 SvREFCNT_dec (coro_mortal);
776 coro_mortal = 0;
777 }
778 UNLOCK;
779} 1337}
780 1338
781/* use this function pointer to call the above function */ 1339struct transfer_args
782/* this is done to increase chances of the compiler not inlining the call */ 1340{
783void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1341 struct coro *prev, *next;
1342};
784 1343
785#define SV_CORO(sv,func) \ 1344#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
786 do { \ 1345#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
787 if (SvROK (sv)) \
788 sv = SvRV (sv); \
789 \
790 if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791 { \
792 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793 \
794 if (!he) \
795 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796 \
797 (sv) = SvRV (HeVAL(he)); \
798 } \
799 \
800 /* must also be changed inside Coro::Cont::yield */ \
801 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803 \
804 } while(0)
805 1346
1347/** high level stuff ********************************************************/
1348
806static void 1349static int
807coro_state_destroy (struct coro *coro) 1350coro_state_destroy (pTHX_ struct coro *coro)
808{ 1351{
809 if (coro->refcnt--) 1352 if (coro->flags & CF_DESTROYED)
810 return; 1353 return 0;
1354
1355 coro->flags |= CF_DESTROYED;
1356
1357 if (coro->flags & CF_READY)
1358 {
1359 /* reduce nready, as destroying a ready coro effectively unreadies it */
1360 /* alternative: look through all ready queues and remove the coro */
1361 LOCK;
1362 --coro_nready;
1363 UNLOCK;
1364 }
1365 else
1366 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
811 1367
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1368 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1369 {
814 struct coro temp; 1370 struct coro temp;
815 1371
816 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1372 if (coro->flags & CF_RUNNING)
1373 croak ("FATAL: tried to destroy currently running coroutine");
1374
1375 save_perl (aTHX_ &temp);
817 LOAD (aTHX_ coro); 1376 load_perl (aTHX_ coro);
818 1377
819 destroy_stacks (aTHX); 1378 coro_destruct (aTHX_ coro);
820 1379
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1380 load_perl (aTHX_ &temp);
822 1381
823 coro->mainstack = 0; 1382 coro->slot = 0;
824 } 1383 }
825 1384
826 deallocate_stack (coro); 1385 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1386 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1387
1388 if (coro->next) coro->next->prev = coro->prev;
1389 if (coro->prev) coro->prev->next = coro->next;
1390 if (coro == coro_first) coro_first = coro->next;
1391
1392 return 1;
829} 1393}
830 1394
831static int 1395static int
832coro_state_clear (SV *sv, MAGIC *mg) 1396coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1397{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1398 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1399 mg->mg_ptr = 0;
836 1400
1401 coro->hv = 0;
1402
1403 if (--coro->refcnt < 0)
1404 {
837 coro_state_destroy (coro); 1405 coro_state_destroy (aTHX_ coro);
1406 Safefree (coro);
1407 }
838 1408
839 return 0; 1409 return 0;
840} 1410}
841 1411
842static int 1412static int
843coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1413coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844{ 1414{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 1415 struct coro *coro = (struct coro *)mg->mg_ptr;
846 1416
847 ++coro->refcnt; 1417 ++coro->refcnt;
848 1418
849 return 0; 1419 return 0;
850} 1420}
851 1421
852static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1422static MGVTBL coro_state_vtbl = {
853 1423 0, 0, 0, 0,
854static struct coro * 1424 coro_state_free,
855SvSTATE (SV *coro) 1425 0,
856{ 1426#ifdef MGf_DUP
857 MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro); 1427 coro_state_dup,
858 assert (mg->mg_type == PERL_MAGIC_ext); 1428#else
859 return (struct coro *)mg->mg_ptr; 1429# define MGf_DUP 0
860} 1430#endif
1431};
861 1432
862static void 1433static void
1434prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1435{
1436 ta->prev = SvSTATE (prev_sv);
1437 ta->next = SvSTATE (next_sv);
1438 TRANSFER_CHECK (*ta);
1439}
1440
1441static void
863api_transfer (pTHX_ SV *prev, SV *next, int flags) 1442api_transfer (SV *prev_sv, SV *next_sv)
864{ 1443{
865 SV_CORO (prev, "Coro::transfer"); 1444 dTHX;
866 SV_CORO (next, "Coro::transfer"); 1445 struct transfer_args ta;
867 1446
868 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1447 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1448 TRANSFER (ta, 1);
869} 1449}
870 1450
871/** Coro ********************************************************************/ 1451/** Coro ********************************************************************/
872 1452
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 1453static void
886coro_enq (pTHX_ SV *sv) 1454coro_enq (pTHX_ SV *coro_sv)
1455{
1456 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1457}
1458
1459static SV *
1460coro_deq (pTHX)
887{ 1461{
888 int prio; 1462 int prio;
889 1463
890 if (SvTYPE (sv) != SVt_PVHV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893 {
894 SV *coro = sv;
895 SV_CORO (coro, "omg");
896 prio = SvSTATE (coro)->prio;
897 }
898
899 av_push (coro_ready [prio - PRIO_MIN], sv);
900 coro_nready++;
901}
902
903static SV *
904coro_deq (pTHX_ int min_prio)
905{
906 int prio = PRIO_MAX - PRIO_MIN;
907
908 min_prio -= PRIO_MIN;
909 if (min_prio < 0)
910 min_prio = 0;
911
912 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1464 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
913 if (AvFILLp (coro_ready [prio]) >= 0) 1465 if (AvFILLp (coro_ready [prio]) >= 0)
914 {
915 coro_nready--;
916 return av_shift (coro_ready [prio]); 1466 return av_shift (coro_ready [prio]);
917 }
918 1467
919 return 0; 1468 return 0;
920} 1469}
921 1470
1471static int
1472api_ready (SV *coro_sv)
1473{
1474 dTHX;
1475 struct coro *coro;
1476 SV *sv_hook;
1477 void (*xs_hook)(void);
1478
1479 if (SvROK (coro_sv))
1480 coro_sv = SvRV (coro_sv);
1481
1482 coro = SvSTATE (coro_sv);
1483
1484 if (coro->flags & CF_READY)
1485 return 0;
1486
1487 coro->flags |= CF_READY;
1488
1489 LOCK;
1490
1491 sv_hook = coro_nready ? 0 : coro_readyhook;
1492 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1493
1494 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1495 ++coro_nready;
1496
1497 UNLOCK;
1498
1499 if (sv_hook)
1500 {
1501 dSP;
1502
1503 ENTER;
1504 SAVETMPS;
1505
1506 PUSHMARK (SP);
1507 PUTBACK;
1508 call_sv (sv_hook, G_DISCARD);
1509 SPAGAIN;
1510
1511 FREETMPS;
1512 LEAVE;
1513 }
1514
1515 if (xs_hook)
1516 xs_hook ();
1517
1518 return 1;
1519}
1520
1521static int
1522api_is_ready (SV *coro_sv)
1523{
1524 dTHX;
1525 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1526}
1527
922static void 1528static void
923api_ready (SV *coro) 1529prepare_schedule (pTHX_ struct transfer_args *ta)
924{ 1530{
925 dTHX; 1531 SV *prev_sv, *next_sv;
926 1532
927 if (SvROK (coro)) 1533 for (;;)
928 coro = SvRV (coro); 1534 {
1535 LOCK;
1536 next_sv = coro_deq (aTHX);
1537
1538 /* nothing to schedule: call the idle handler */
1539 if (expect_false (!next_sv))
1540 {
1541 dSP;
1542 UNLOCK;
1543
1544 ENTER;
1545 SAVETMPS;
1546
1547 PUSHMARK (SP);
1548 PUTBACK;
1549 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1550 SPAGAIN;
1551
1552 FREETMPS;
1553 LEAVE;
1554 continue;
1555 }
1556
1557 ta->next = SvSTATE (next_sv);
1558
1559 /* cannot transfer to destroyed coros, skip and look for next */
1560 if (expect_false (ta->next->flags & CF_DESTROYED))
1561 {
1562 UNLOCK;
1563 SvREFCNT_dec (next_sv);
1564 /* coro_nready is already taken care of by destroy */
1565 continue;
1566 }
1567
1568 --coro_nready;
1569 UNLOCK;
1570 break;
1571 }
1572
1573 /* free this only after the transfer */
1574 prev_sv = SvRV (coro_current);
1575 ta->prev = SvSTATE (prev_sv);
1576 TRANSFER_CHECK (*ta);
1577 assert (ta->next->flags & CF_READY);
1578 ta->next->flags &= ~CF_READY;
1579 SvRV_set (coro_current, next_sv);
929 1580
930 LOCK; 1581 LOCK;
931 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1582 free_coro_mortal (aTHX);
1583 coro_mortal = prev_sv;
932 UNLOCK; 1584 UNLOCK;
1585}
1586
1587static void
1588prepare_cede (pTHX_ struct transfer_args *ta)
1589{
1590 api_ready (coro_current);
1591 prepare_schedule (aTHX_ ta);
1592}
1593
1594static int
1595prepare_cede_notself (pTHX_ struct transfer_args *ta)
1596{
1597 if (coro_nready)
1598 {
1599 SV *prev = SvRV (coro_current);
1600 prepare_schedule (aTHX_ ta);
1601 api_ready (prev);
1602 return 1;
1603 }
1604 else
1605 return 0;
933} 1606}
934 1607
935static void 1608static void
936api_schedule (void) 1609api_schedule (void)
937{ 1610{
938 dTHX; 1611 dTHX;
1612 struct transfer_args ta;
939 1613
940 SV *prev, *next; 1614 prepare_schedule (aTHX_ &ta);
1615 TRANSFER (ta, 1);
1616}
941 1617
942 LOCK; 1618static int
1619api_cede (void)
1620{
1621 dTHX;
1622 struct transfer_args ta;
943 1623
944 prev = SvRV (GvSV (coro_current)); 1624 prepare_cede (aTHX_ &ta);
945 next = coro_deq (aTHX_ PRIO_MIN);
946 1625
947 if (!next) 1626 if (expect_true (ta.prev != ta.next))
948 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1627 {
1628 TRANSFER (ta, 1);
1629 return 1;
1630 }
1631 else
1632 return 0;
1633}
949 1634
950 /* free this only after the transfer */ 1635static int
951 coro_mortal = prev; 1636api_cede_notself (void)
952 SV_CORO (prev, "Coro::schedule"); 1637{
1638 dTHX;
1639 struct transfer_args ta;
953 1640
954 SvRV (GvSV (coro_current)) = next; 1641 if (prepare_cede_notself (aTHX_ &ta))
955 1642 {
956 SV_CORO (next, "Coro::schedule"); 1643 TRANSFER (ta, 1);
957 1644 return 1;
958 UNLOCK; 1645 }
959 1646 else
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1647 return 0;
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962} 1648}
963 1649
964static void 1650static void
965api_cede (void) 1651api_trace (SV *coro_sv, int flags)
966{ 1652{
967 dTHX; 1653 dTHX;
1654 struct coro *coro = SvSTATE (coro_sv);
968 1655
969 LOCK; 1656 if (flags & CC_TRACE)
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1657 {
971 UNLOCK; 1658 if (!coro->cctx)
1659 coro->cctx = cctx_new ();
1660 else if (!(coro->cctx->flags & CC_TRACE))
1661 croak ("cannot enable tracing on coroutine with custom stack");
972 1662
1663 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1664 }
1665 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666 {
1667 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1668
1669 if (coro->flags & CF_RUNNING)
1670 PL_runops = RUNOPS_DEFAULT;
1671 else
1672 coro->slot->runops = RUNOPS_DEFAULT;
1673 }
1674}
1675
1676#if 0
1677static int
1678coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1679{
1680 AV *padlist;
1681 AV *av = (AV *)mg->mg_obj;
1682
1683 abort ();
1684
1685 return 0;
1686}
1687
1688static MGVTBL coro_gensub_vtbl = {
1689 0, 0, 0, 0,
1690 coro_gensub_free
1691};
1692#endif
1693
1694/*****************************************************************************/
1695/* PerlIO::cede */
1696
1697typedef struct
1698{
1699 PerlIOBuf base;
1700 NV next, every;
1701} PerlIOCede;
1702
1703static IV
1704PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1705{
1706 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1707
1708 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1709 self->next = nvtime () + self->every;
1710
1711 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1712}
1713
1714static SV *
1715PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1716{
1717 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1718
1719 return newSVnv (self->every);
1720}
1721
1722static IV
1723PerlIOCede_flush (pTHX_ PerlIO *f)
1724{
1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726 double now = nvtime ();
1727
1728 if (now >= self->next)
1729 {
973 api_schedule (); 1730 api_cede ();
974} 1731 self->next = now + self->every;
1732 }
975 1733
1734 return PerlIOBuf_flush (aTHX_ f);
1735}
1736
1737static PerlIO_funcs PerlIO_cede =
1738{
1739 sizeof(PerlIO_funcs),
1740 "cede",
1741 sizeof(PerlIOCede),
1742 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1743 PerlIOCede_pushed,
1744 PerlIOBuf_popped,
1745 PerlIOBuf_open,
1746 PerlIOBase_binmode,
1747 PerlIOCede_getarg,
1748 PerlIOBase_fileno,
1749 PerlIOBuf_dup,
1750 PerlIOBuf_read,
1751 PerlIOBuf_unread,
1752 PerlIOBuf_write,
1753 PerlIOBuf_seek,
1754 PerlIOBuf_tell,
1755 PerlIOBuf_close,
1756 PerlIOCede_flush,
1757 PerlIOBuf_fill,
1758 PerlIOBase_eof,
1759 PerlIOBase_error,
1760 PerlIOBase_clearerr,
1761 PerlIOBase_setlinebuf,
1762 PerlIOBuf_get_base,
1763 PerlIOBuf_bufsiz,
1764 PerlIOBuf_get_ptr,
1765 PerlIOBuf_get_cnt,
1766 PerlIOBuf_set_ptrcnt,
1767};
1768
1769
976MODULE = Coro::State PACKAGE = Coro::State 1770MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 1771
978PROTOTYPES: DISABLE 1772PROTOTYPES: DISABLE
979 1773
980BOOT: 1774BOOT:
981{ /* {} necessary for stoopid perl-5.6.x */ 1775{
982#ifdef USE_ITHREADS 1776#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 1777 MUTEX_INIT (&coro_lock);
1778# if CORO_PTHREAD
1779 coro_thx = PERL_GET_CONTEXT;
1780# endif
984#endif 1781#endif
985 BOOT_PAGESIZE; 1782 BOOT_PAGESIZE;
986 1783
987 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1784 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
988 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1785 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1786
1787 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1788 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1789 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1790
1791 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1792 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1793 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1794
989 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1795 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990 1796
991 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1797 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1798 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1799 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1800 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995 1801
996 main_mainstack = PL_mainstack; 1802 main_mainstack = PL_mainstack;
1803 main_top_env = PL_top_env;
997 1804
1805 while (main_top_env->je_prev)
1806 main_top_env = main_top_env->je_prev;
1807
998 coroapi.ver = CORO_API_VERSION; 1808 coroapi.ver = CORO_API_VERSION;
1809 coroapi.rev = CORO_API_REVISION;
999 coroapi.transfer = api_transfer; 1810 coroapi.transfer = api_transfer;
1811
1812 {
1813 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814
1815 if (!svp) croak ("Time::HiRes is required");
1816 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1817
1818 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1819 }
1000 1820
1001 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1821 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1002} 1822}
1003 1823
1004SV * 1824SV *
1005new (char *klass, ...) 1825new (char *klass, ...)
1006 CODE: 1826 CODE:
1007{ 1827{
1008 struct coro *coro; 1828 struct coro *coro;
1829 MAGIC *mg;
1009 HV *hv; 1830 HV *hv;
1010 int i; 1831 int i;
1011 1832
1012 Newz (0, coro, 1, struct coro); 1833 Newz (0, coro, 1, struct coro);
1013 coro->args = newAV (); 1834 coro->args = newAV ();
1835 coro->flags = CF_NEW;
1014 1836
1837 if (coro_first) coro_first->prev = coro;
1838 coro->next = coro_first;
1839 coro_first = coro;
1840
1841 coro->hv = hv = newHV ();
1842 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1843 mg->mg_flags |= MGf_DUP;
1844 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1845
1846 av_extend (coro->args, items - 1);
1015 for (i = 1; i < items; i++) 1847 for (i = 1; i < items; i++)
1016 av_push (coro->args, newSVsv (ST (i))); 1848 av_push (coro->args, newSVsv (ST (i)));
1017
1018 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1019 /*coro->stack = 0;*/
1020
1021 hv = newHV ();
1022 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1023 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1024} 1849}
1025 OUTPUT: 1850 OUTPUT:
1026 RETVAL 1851 RETVAL
1027 1852
1853# these not obviously related functions are all rolled into the same xs
1854# function to increase chances that they all will call transfer with the same
1855# stack offset
1028void 1856void
1029transfer(prev, next, flags) 1857_set_stacklevel (...)
1030 SV *prev 1858 ALIAS:
1031 SV *next 1859 Coro::State::transfer = 1
1032 int flags 1860 Coro::schedule = 2
1861 Coro::cede = 3
1862 Coro::cede_notself = 4
1033 CODE: 1863 CODE:
1864{
1865 struct transfer_args ta;
1866
1034 PUTBACK; 1867 PUTBACK;
1035 SV_CORO (next, "Coro::transfer"); 1868 switch (ix)
1036 SV_CORO (prev, "Coro::transfer"); 1869 {
1037 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1870 case 0:
1871 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1872 ta.next = 0;
1873 break;
1874
1875 case 1:
1876 if (items != 2)
1877 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1878
1879 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1880 break;
1881
1882 case 2:
1883 prepare_schedule (aTHX_ &ta);
1884 break;
1885
1886 case 3:
1887 prepare_cede (aTHX_ &ta);
1888 break;
1889
1890 case 4:
1891 if (!prepare_cede_notself (aTHX_ &ta))
1892 XSRETURN_EMPTY;
1893
1894 break;
1895 }
1038 SPAGAIN; 1896 SPAGAIN;
1897
1898 BARRIER;
1899 PUTBACK;
1900 TRANSFER (ta, 0);
1901 SPAGAIN; /* might be the sp of a different coroutine now */
1902 /* be extra careful not to ever do anything after TRANSFER */
1903}
1904
1905bool
1906_destroy (SV *coro_sv)
1907 CODE:
1908 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1909 OUTPUT:
1910 RETVAL
1911
1912void
1913_exit (int code)
1914 PROTOTYPE: $
1915 CODE:
1916 _exit (code);
1917
1918int
1919cctx_stacksize (int new_stacksize = 0)
1920 CODE:
1921 RETVAL = cctx_stacksize;
1922 if (new_stacksize)
1923 {
1924 cctx_stacksize = new_stacksize;
1925 ++cctx_gen;
1926 }
1927 OUTPUT:
1928 RETVAL
1929
1930int
1931cctx_max_idle (int max_idle = 0)
1932 CODE:
1933 RETVAL = cctx_max_idle;
1934 if (max_idle > 1)
1935 cctx_max_idle = max_idle;
1936 OUTPUT:
1937 RETVAL
1938
1939int
1940cctx_count ()
1941 CODE:
1942 RETVAL = cctx_count;
1943 OUTPUT:
1944 RETVAL
1945
1946int
1947cctx_idle ()
1948 CODE:
1949 RETVAL = cctx_idle;
1950 OUTPUT:
1951 RETVAL
1952
1953void
1954list ()
1955 PPCODE:
1956{
1957 struct coro *coro;
1958 for (coro = coro_first; coro; coro = coro->next)
1959 if (coro->hv)
1960 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1961}
1962
1963void
1964call (Coro::State coro, SV *coderef)
1965 ALIAS:
1966 eval = 1
1967 CODE:
1968{
1969 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1970 {
1971 struct coro temp;
1972
1973 if (!(coro->flags & CF_RUNNING))
1974 {
1975 PUTBACK;
1976 save_perl (aTHX_ &temp);
1977 load_perl (aTHX_ coro);
1978 }
1979
1980 {
1981 dSP;
1982 ENTER;
1983 SAVETMPS;
1984 PUTBACK;
1985 PUSHSTACK;
1986 PUSHMARK (SP);
1987
1988 if (ix)
1989 eval_sv (coderef, 0);
1990 else
1991 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1992
1993 POPSTACK;
1994 SPAGAIN;
1995 FREETMPS;
1996 LEAVE;
1997 PUTBACK;
1998 }
1999
2000 if (!(coro->flags & CF_RUNNING))
2001 {
2002 save_perl (aTHX_ coro);
2003 load_perl (aTHX_ &temp);
2004 SPAGAIN;
2005 }
2006 }
2007}
2008
2009SV *
2010is_ready (Coro::State coro)
2011 PROTOTYPE: $
2012 ALIAS:
2013 is_ready = CF_READY
2014 is_running = CF_RUNNING
2015 is_new = CF_NEW
2016 is_destroyed = CF_DESTROYED
2017 CODE:
2018 RETVAL = boolSV (coro->flags & ix);
2019 OUTPUT:
2020 RETVAL
2021
2022void
2023api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2024
2025SV *
2026has_cctx (Coro::State coro)
2027 PROTOTYPE: $
2028 CODE:
2029 RETVAL = boolSV (!!coro->cctx);
2030 OUTPUT:
2031 RETVAL
2032
2033int
2034is_traced (Coro::State coro)
2035 PROTOTYPE: $
2036 CODE:
2037 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2038 OUTPUT:
2039 RETVAL
2040
2041UV
2042rss (Coro::State coro)
2043 PROTOTYPE: $
2044 ALIAS:
2045 usecount = 1
2046 CODE:
2047 switch (ix)
2048 {
2049 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2050 case 1: RETVAL = coro->usecount; break;
2051 }
2052 OUTPUT:
2053 RETVAL
2054
2055void
2056force_cctx ()
2057 CODE:
2058 struct coro *coro = SvSTATE (coro_current);
2059 coro->cctx->idle_sp = 0;
2060
2061void
2062swap_defsv (Coro::State self)
2063 PROTOTYPE: $
2064 ALIAS:
2065 swap_defav = 1
2066 CODE:
2067 if (!self->slot)
2068 croak ("cannot swap state with coroutine that has no saved state");
2069 else
2070 {
2071 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2073
2074 SV *tmp = *src; *src = *dst; *dst = tmp;
2075 }
2076
2077MODULE = Coro::State PACKAGE = Coro
2078
2079BOOT:
2080{
2081 int i;
2082
2083 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2084 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2085 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2086
2087 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2088 SvREADONLY_on (coro_current);
2089
2090 coro_stash = gv_stashpv ("Coro", TRUE);
2091
2092 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2093 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2094 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2095 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2096 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2097 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2098
2099 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2100 coro_ready[i] = newAV ();
2101
2102 {
2103 SV *sv = perl_get_sv ("Coro::API", TRUE);
2104 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2105
2106 coroapi.schedule = api_schedule;
2107 coroapi.cede = api_cede;
2108 coroapi.cede_notself = api_cede_notself;
2109 coroapi.ready = api_ready;
2110 coroapi.is_ready = api_is_ready;
2111 coroapi.nready = &coro_nready;
2112 coroapi.current = coro_current;
2113
2114 GCoroAPI = &coroapi;
2115 sv_setiv (sv, (IV)&coroapi);
2116 SvREADONLY_on (sv);
2117 }
2118}
2119
2120void
2121_set_current (SV *current)
2122 PROTOTYPE: $
2123 CODE:
2124 SvREFCNT_dec (SvRV (coro_current));
2125 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2126
2127void
2128_set_readyhook (SV *hook)
2129 PROTOTYPE: $
2130 CODE:
2131 LOCK;
2132 SvREFCNT_dec (coro_readyhook);
2133 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2134 UNLOCK;
1039 2135
1040int 2136int
1041prio (Coro::State coro, int newprio = 0) 2137prio (Coro::State coro, int newprio = 0)
1042 ALIAS: 2138 ALIAS:
1043 nice = 1 2139 nice = 1
… …
1046 RETVAL = coro->prio; 2142 RETVAL = coro->prio;
1047 2143
1048 if (items > 1) 2144 if (items > 1)
1049 { 2145 {
1050 if (ix) 2146 if (ix)
1051 newprio += coro->prio; 2147 newprio = coro->prio - newprio;
1052 2148
1053 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2149 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1054 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2150 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1055 2151
1056 coro->prio = newprio; 2152 coro->prio = newprio;
1057 } 2153 }
1058} 2154}
2155 OUTPUT:
2156 RETVAL
1059 2157
1060void 2158SV *
1061_clone_state_from (SV *dst, SV *src) 2159ready (SV *self)
1062 CODE:
1063{
1064 struct coro *coro_src = SvSTATE (src);
1065
1066 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068 ++coro_src->refcnt;
1069 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070}
1071
1072void
1073_exit (code)
1074 int code
1075 PROTOTYPE: $ 2160 PROTOTYPE: $
1076 CODE: 2161 CODE:
1077 _exit (code); 2162 RETVAL = boolSV (api_ready (self));
1078 2163 OUTPUT:
1079MODULE = Coro::State PACKAGE = Coro::Cont 2164 RETVAL
1080
1081void
1082yield (...)
1083 PROTOTYPE: @
1084 CODE:
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 struct coro *prev, *next;
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105 SvREFCNT_dec (sv);
1106
1107 coro_state_transfer (aTHX_ prev, next, 0);
1108
1109MODULE = Coro::State PACKAGE = Coro
1110
1111BOOT:
1112{
1113 int i;
1114 HV *stash = gv_stashpv ("Coro", TRUE);
1115
1116 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125
1126 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127 coro_ready[i] = newAV ();
1128
1129 {
1130 SV *sv = perl_get_sv("Coro::API", 1);
1131
1132 coroapi.schedule = api_schedule;
1133 coroapi.cede = api_cede;
1134 coroapi.ready = api_ready;
1135 coroapi.nready = &coro_nready;
1136 coroapi.current = coro_current;
1137
1138 GCoroAPI = &coroapi;
1139 sv_setiv (sv, (IV)&coroapi);
1140 SvREADONLY_on (sv);
1141 }
1142}
1143
1144#if !PERL_MICRO
1145
1146void
1147ready (self)
1148 SV * self
1149 PROTOTYPE: $
1150 CODE:
1151 api_ready (self);
1152
1153#endif
1154 2165
1155int 2166int
1156nready (...) 2167nready (...)
1157 PROTOTYPE: 2168 PROTOTYPE:
1158 CODE: 2169 CODE:
1159 RETVAL = coro_nready; 2170 RETVAL = coro_nready;
1160 OUTPUT: 2171 OUTPUT:
1161 RETVAL 2172 RETVAL
1162 2173
1163void 2174void
1164schedule (...) 2175throw (Coro::State self, SV *throw = &PL_sv_undef)
1165 PROTOTYPE: 2176 PROTOTYPE: $;$
2177 CODE:
2178 SvREFCNT_dec (self->throw);
2179 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2180
2181# for async_pool speedup
2182void
2183_pool_1 (SV *cb)
1166 CODE: 2184 CODE:
1167 api_schedule (); 2185{
2186 struct coro *coro = SvSTATE (coro_current);
2187 HV *hv = (HV *)SvRV (coro_current);
2188 AV *defav = GvAV (PL_defgv);
2189 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2190 AV *invoke_av;
2191 int i, len;
2192
2193 if (!invoke)
2194 {
2195 SV *old = PL_diehook;
2196 PL_diehook = 0;
2197 SvREFCNT_dec (old);
2198 croak ("\3async_pool terminate\2\n");
2199 }
2200
2201 SvREFCNT_dec (coro->saved_deffh);
2202 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2203
2204 hv_store (hv, "desc", sizeof ("desc") - 1,
2205 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2206
2207 invoke_av = (AV *)SvRV (invoke);
2208 len = av_len (invoke_av);
2209
2210 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2211
2212 if (len > 0)
2213 {
2214 av_fill (defav, len - 1);
2215 for (i = 0; i < len; ++i)
2216 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2217 }
2218
2219 SvREFCNT_dec (invoke);
2220}
1168 2221
1169void 2222void
1170cede (...) 2223_pool_2 (SV *cb)
1171 PROTOTYPE:
1172 CODE: 2224 CODE:
1173 api_cede (); 2225{
2226 struct coro *coro = SvSTATE (coro_current);
1174 2227
1175# and these are hacks 2228 sv_setsv (cb, &PL_sv_undef);
2229
2230 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2231 coro->saved_deffh = 0;
2232
2233 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2234 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2235 {
2236 SV *old = PL_diehook;
2237 PL_diehook = 0;
2238 SvREFCNT_dec (old);
2239 croak ("\3async_pool terminate\2\n");
2240 }
2241
2242 av_clear (GvAV (PL_defgv));
2243 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2244 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245
2246 coro->prio = 0;
2247
2248 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249 api_trace (coro_current, 0);
2250
2251 av_push (av_async_pool, newSVsv (coro_current));
2252}
2253
2254#if 0
2255
2256void
2257_generator_call (...)
2258 PROTOTYPE: @
2259 PPCODE:
2260 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2261 xxxx
2262 abort ();
2263
1176SV * 2264SV *
1177_aio_get_state () 2265gensub (SV *sub, ...)
1178 CODE: 2266 PROTOTYPE: &;@
2267 CODE:
1179{ 2268{
1180 struct { 2269 struct coro *coro;
1181 int errorno; 2270 MAGIC *mg;
1182 int laststype; 2271 CV *xcv;
1183 int laststatval; 2272 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1184 Stat_t statcache; 2273 int i;
1185 } data;
1186 2274
1187 data.errorno = errno; 2275 CvGV (ncv) = CvGV (cv);
1188 data.laststype = PL_laststype; 2276 CvFILE (ncv) = CvFILE (cv);
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191 2277
1192 RETVAL = newSVpvn ((char *)&data, sizeof data); 2278 Newz (0, coro, 1, struct coro);
2279 coro->args = newAV ();
2280 coro->flags = CF_NEW;
2281
2282 av_extend (coro->args, items - 1);
2283 for (i = 1; i < items; i++)
2284 av_push (coro->args, newSVsv (ST (i)));
2285
2286 CvISXSUB_on (ncv);
2287 CvXSUBANY (ncv).any_ptr = (void *)coro;
2288
2289 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2290
2291 CvXSUB (ncv) = CvXSUB (xcv);
2292 CvANON_on (ncv);
2293
2294 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2295 RETVAL = newRV_noinc ((SV *)ncv);
1193} 2296}
1194 OUTPUT: 2297 OUTPUT:
1195 RETVAL 2298 RETVAL
1196 2299
2300#endif
2301
2302
2303MODULE = Coro::State PACKAGE = Coro::AIO
2304
1197void 2305void
1198_aio_set_state (char *data_) 2306_get_state (SV *self)
2307 PPCODE:
2308{
2309 AV *defav = GvAV (PL_defgv);
2310 AV *av = newAV ();
2311 int i;
2312 SV *data_sv = newSV (sizeof (struct io_state));
2313 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2314 SvCUR_set (data_sv, sizeof (struct io_state));
2315 SvPOK_only (data_sv);
2316
2317 data->errorno = errno;
2318 data->laststype = PL_laststype;
2319 data->laststatval = PL_laststatval;
2320 data->statcache = PL_statcache;
2321
2322 av_extend (av, AvFILLp (defav) + 1 + 1);
2323
2324 for (i = 0; i <= AvFILLp (defav); ++i)
2325 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2326
2327 av_push (av, data_sv);
2328
2329 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2330
2331 api_ready (self);
2332}
2333
2334void
2335_set_state (SV *state)
1199 PROTOTYPE: $ 2336 PROTOTYPE: $
2337 PPCODE:
2338{
2339 AV *av = (AV *)SvRV (state);
2340 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2341 int i;
2342
2343 errno = data->errorno;
2344 PL_laststype = data->laststype;
2345 PL_laststatval = data->laststatval;
2346 PL_statcache = data->statcache;
2347
2348 EXTEND (SP, AvFILLp (av));
2349 for (i = 0; i < AvFILLp (av); ++i)
2350 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2351}
2352
2353
2354MODULE = Coro::State PACKAGE = Coro::AnyEvent
2355
2356BOOT:
2357 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2358
2359SV *
2360_schedule (...)
2361 PROTOTYPE: @
1200 CODE: 2362 CODE:
1201{ 2363{
1202 struct { 2364 static int incede;
1203 int errorno;
1204 int laststype;
1205 int laststatval;
1206 Stat_t statcache;
1207 } *data = (void *)data_;
1208 2365
1209 errno = data->errorno; 2366 api_cede_notself ();
1210 PL_laststype = data->laststype; 2367
1211 PL_laststatval = data->laststatval; 2368 ++incede;
1212 PL_statcache = data->statcache; 2369 while (coro_nready >= incede && api_cede ())
2370 ;
2371
2372 sv_setsv (sv_activity, &PL_sv_undef);
2373 if (coro_nready >= incede)
2374 {
2375 PUSHMARK (SP);
2376 PUTBACK;
2377 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2378 SPAGAIN;
2379 }
2380
2381 --incede;
1213} 2382}
2383
2384
2385MODULE = Coro::State PACKAGE = PerlIO::cede
2386
2387BOOT:
2388 PerlIO_define_layer (aTHX_ &PerlIO_cede);

Diff Legend

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