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Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.262 by root, Mon Nov 10 20:38:19 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#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)
10# ifndef PL_ppaddr 66# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
12# endif 68# endif
13# ifndef call_sv 69# ifndef call_sv
14# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 81# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
27# endif 83# endif
28#endif 84#endif
29 85
30#include <stdio.h> 86/* 5.11 */
31#include <errno.h> 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
32 108
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34# undef STACKGUARD 110# undef CORO_STACKGUARD
35#endif 111#endif
36 112
37#ifndef STACKGUARD 113#ifndef CORO_STACKGUARD
38# define STACKGUARD 0 114# define CORO_STACKGUARD 0
39#endif
40
41#ifdef HAVE_MMAP
42# include <unistd.h>
43# include <sys/mman.h>
44# ifndef MAP_ANONYMOUS
45# ifdef MAP_ANON
46# define MAP_ANONYMOUS MAP_ANON
47# else
48# undef HAVE_MMAP
49# 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;
50# endif 153# endif
51# include <limits.h>
52# ifndef PAGESIZE
53# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize;
56# else
57# define BOOT_PAGESIZE
58# endif
59#endif
60 154
61/* The next macro should declare a variable stacklevel that contains and approximation
62 * to the current C stack pointer. Its property is that it changes with each call
63 * and should be unique. */
64#define dSTACKLEVEL int stacklevel
65#define STACKLEVEL ((void *)&stacklevel)
66
67#define IN_DESTRUCT (PL_main_cv == Nullcv)
68
69#include "CoroAPI.h"
70
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else 155#else
156
78# define LOCK (void)0 157# define LOCK (void)0
79# define UNLOCK (void)0 158# define UNLOCK (void)0
80#endif
81 159
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;
82static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
83static 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;
84static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
86 218
87/* this is a structure representing a c-level coroutine */ 219/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 220typedef struct coro_cctx {
89 struct coro_stack *next; 221 struct coro_cctx *next;
90 222
91 /* the stack */ 223 /* the stack */
92 void *sptr; 224 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 225 size_t ssize;
94 226
95 /* cpu state */ 227 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97 JMPENV *top_env; 230 JMPENV *top_env;
98 coro_context cctx; 231 coro_context cctx;
99} coro_stack; 232
233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
100 259
101/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
102struct coro { 261struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the c coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 263 coro_cctx *cctx;
105 264
106 /* data associated with this coroutine (initial args) */ 265 /* process data */
107 AV *args;
108 int refcnt;
109
110 /* optionally saved, might be zero */
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; 266 AV *mainstack;
123 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
124 OP *op; 268
125 SV **curpad; 269 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 270 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 271 int flags; /* CF_ flags */
128 SV **stack_base; 272 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 273
130 SV **tmps_stack; 274 /* statistics */
131 I32 tmps_floor; 275 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;
148 276
149 /* coro process data */ 277 /* coro process data */
150 int prio; 278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
151}; 286};
152 287
153typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
155 290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static int coro_nready;
305static struct coro *coro_first;
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
156static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
157coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
158{ 341{
159 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
161 344
162 newpadlist = newAV (); 345 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 351#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 353 --AvFILLp (padlist);
171 354
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
174 357
175 return newpadlist; 358 return newpadlist;
176} 359}
177 360
178static void 361static void
179free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
180{ 363{
181 /* may be during global destruction */ 364 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
183 { 366 {
184 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
205 AV *padlist; 388 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
207 390
208 /* casting is fun. */ 391 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
211 394
212 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 396
214 return 0; 397 return 0;
215} 398}
216 399
217#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
218 402
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418static struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
220 443
221/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
222static void 445static void
223get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
224{ 447{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
226 450
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 453 else
230 { 454 {
231#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
237#else 462#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239#endif 464#endif
240 } 465 }
241} 466}
242 467
243static void 468static void
244put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
245{ 470{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
247 473
248 if (!mg) 474 if (expect_false (!mg))
249 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 476
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
257}
258 478
259#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
261 481
262#define LOAD(state) load_state((state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 483}
264 484
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
266 486
267static void 487static void
268load_state(Coro__State c) 488load_perl (pTHX_ Coro__State c)
269{ 489{
270 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 491 c->slot = 0;
272 492
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 494
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
307 503
308 { 504 {
309 dSP; 505 dSP;
506
310 CV *cv; 507 CV *cv;
311 508
312 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
314 { 511 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
321 } 514 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 515 }
325 516
326 PUTBACK; 517 PUTBACK;
327 } 518 }
328} 519}
329 520
330static void 521static void
331save_state(Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
332{ 523{
333 { 524 {
334 dSP; 525 dSP;
335 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
339 /* 530 /*
340 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
342 */ 533 */
343 534
344 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
346 for (;;) 537 for (;;)
347 { 538 {
348 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
349 { 540 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
351 542
352 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
353 { 544 {
354 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
355 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
356 { 548 {
357 EXTEND (SP, CvDEPTH(cv)*2); 549 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
368 553
554 CvDEPTH (cv) = 0;
369 get_padlist (cv); 555 get_padlist (aTHX_ cv);
370 } 556 }
371 } 557 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 558 }
381 559
382 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 561 break;
384 562
385 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
388 } 566 }
389 567
390 PUTBACK; 568 PUTBACK;
391 } 569 }
392 570
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
396 582
397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
399
400 c->curstackinfo = PL_curstackinfo;
401 c->curstack = PL_curstack;
402 c->mainstack = PL_mainstack; 583 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 584
404 c->op = PL_op; 585 {
405 c->curpad = PL_curpad; 586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 587
407 c->compcv = PL_compcv; 588 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 589 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 590 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 591 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 592
412 c->tmps_ix = PL_tmps_ix; 593 #define VAR(name,type) slot->name = PL_ ## name;
413 c->tmps_max = PL_tmps_max; 594 # include "state.h"
414 c->markstack = PL_markstack; 595 #undef VAR
415 c->markstack_ptr = PL_markstack_ptr; 596 }
416 c->markstack_max = PL_markstack_max;
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
429 c->curcop = PL_curcop;
430} 597}
431 598
432/* 599/*
433 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
437 */ 604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
438static void 608static void
439coro_init_stacks () 609coro_init_stacks (pTHX)
440{ 610{
441 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 611 PL_curstackinfo = new_stackinfo(32, 8);
442 PL_curstackinfo->si_type = PERLSI_MAIN; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
443 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445 615
446 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
447 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449 619
450 New(50,PL_tmps_stack,96,SV*); 620 New(50,PL_tmps_stack,32,SV*);
451 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
452 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
453 PL_tmps_max = 96; 623 PL_tmps_max = 32;
454 624
455 New(54,PL_markstack,16,I32); 625 New(54,PL_markstack,16,I32);
456 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
457 PL_markstack_max = PL_markstack + 16; 627 PL_markstack_max = PL_markstack + 16;
458 628
459#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
460 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
461#endif 631#endif
462 632
463 New(54,PL_scopestack,16,I32); 633 New(54,PL_scopestack,8,I32);
464 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
465 PL_scopestack_max = 16; 635 PL_scopestack_max = 8;
466 636
467 New(54,PL_savestack,96,ANY); 637 New(54,PL_savestack,24,ANY);
468 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
469 PL_savestack_max = 96; 639 PL_savestack_max = 24;
470 640
471#if PERL_VERSION < 9 641#if !PERL_VERSION_ATLEAST (5,10,0)
472 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
473 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
474 PL_retstack_max = 8; 644 PL_retstack_max = 4;
475#endif 645#endif
476} 646}
647#endif
477 648
478/* 649/*
479 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
480 */ 651 */
481static void 652static void
482destroy_stacks() 653coro_destruct_stacks (pTHX)
483{ 654{
484 if (!IN_DESTRUCT)
485 {
486 /* is this ugly, I ask? */
487 LEAVE_SCOPE (0);
488
489 /* sure it is, but more important: is it correct?? :/ */
490 FREETMPS;
491
492 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493 }
494
495 while (PL_curstackinfo->si_next) 655 while (PL_curstackinfo->si_next)
496 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
497 657
498 while (PL_curstackinfo) 658 while (PL_curstackinfo)
499 { 659 {
500 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
501 661
502 { /*D*//*remove*/
503 dSP;
504 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505 PUTBACK; /* possibly superfluous */
506 }
507
508 if (!IN_DESTRUCT) 662 if (!IN_DESTRUCT)
509 {
510 dounwind (-1);/*D*//*remove*/
511 SvREFCNT_dec (PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
512 }
513 664
514 Safefree (PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
515 Safefree (PL_curstackinfo); 666 Safefree (PL_curstackinfo);
516 PL_curstackinfo = p; 667 PL_curstackinfo = p;
517 } 668 }
518 669
519 Safefree (PL_tmps_stack); 670 Safefree (PL_tmps_stack);
520 Safefree (PL_markstack); 671 Safefree (PL_markstack);
521 Safefree (PL_scopestack); 672 Safefree (PL_scopestack);
522 Safefree (PL_savestack); 673 Safefree (PL_savestack);
523#if PERL_VERSION < 9 674#if !PERL_VERSION_ATLEAST (5,10,0)
524 Safefree (PL_retstack); 675 Safefree (PL_retstack);
525#endif 676#endif
526} 677}
527 678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** coroutine stack handling ************************************************/
720
721static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
724
725/* apparently < 5.8.8 */
726#ifndef MgPV_nolen_const
727#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
728 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
729 (const char*)(mg)->mg_ptr)
730#endif
731
732/*
733 * This overrides the default magic get method of %SIG elements.
734 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
735 * and instead of tryign to save and restore the hash elements, we just provide
736 * readback here.
737 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
738 * not expecting this to actually change the hook. This is a potential problem
739 * when a schedule happens then, but we ignore this.
740 */
741static int
742coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
743{
744 const char *s = MgPV_nolen_const (mg);
745
746 if (*s == '_')
747 {
748 SV **svp = 0;
749
750 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
751 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
752
753 if (svp)
754 {
755 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
756 return 0;
757 }
758 }
759
760 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
761}
762
763static int
764coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
765{
766 const char *s = MgPV_nolen_const (mg);
767
768 if (*s == '_')
769 {
770 SV **svp = 0;
771
772 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
773 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
774
775 if (svp)
776 {
777 SV *old = *svp;
778 *svp = 0;
779 SvREFCNT_dec (old);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
789{
790 const char *s = MgPV_nolen_const (mg);
791
792 if (*s == '_')
793 {
794 SV **svp = 0;
795
796 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
797 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
798
799 if (svp)
800 {
801 SV *old = *svp;
802 *svp = newSVsv (sv);
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
809}
810
528static void 811static void
529setup_coro (struct coro *coro) 812coro_setup (pTHX_ struct coro *coro)
530{ 813{
531 /* 814 /*
532 * emulate part of the perl startup here. 815 * emulate part of the perl startup here.
533 */ 816 */
534 dTHX; 817 coro_init_stacks (aTHX);
818
819 PL_runops = RUNOPS_DEFAULT;
820 PL_curcop = &PL_compiling;
821 PL_in_eval = EVAL_NULL;
822 PL_comppad = 0;
823 PL_curpm = 0;
824 PL_curpad = 0;
825 PL_localizing = 0;
826 PL_dirty = 0;
827 PL_restartop = 0;
828#if PERL_VERSION_ATLEAST (5,10,0)
829 PL_parser = 0;
830#endif
831
832 /* recreate the die/warn hooks */
833 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
834 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
835
836 GvSV (PL_defgv) = newSV (0);
837 GvAV (PL_defgv) = coro->args; coro->args = 0;
838 GvSV (PL_errgv) = newSV (0);
839 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
840 PL_rs = newSVsv (GvSV (irsgv));
841 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
842
843 {
844 dSP;
845 UNOP myop;
846
847 Zero (&myop, 1, UNOP);
848 myop.op_next = Nullop;
849 myop.op_flags = OPf_WANT_VOID;
850
851 PUSHMARK (SP);
852 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
853 PUTBACK;
854 PL_op = (OP *)&myop;
855 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
856 SPAGAIN;
857 }
858
859 /* this newly created coroutine might be run on an existing cctx which most
860 * likely was suspended in set_stacklevel, called from entersub.
861 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
862 * so we ENTER here for symmetry.
863 */
864 ENTER;
865}
866
867static void
868coro_destruct (pTHX_ struct coro *coro)
869{
870 if (!IN_DESTRUCT)
871 {
872 /* restore all saved variables and stuff */
873 LEAVE_SCOPE (0);
874 assert (PL_tmps_floor == -1);
875
876 /* free all temporaries */
877 FREETMPS;
878 assert (PL_tmps_ix == -1);
879
880 /* unwind all extra stacks */
881 POPSTACK_TO (PL_mainstack);
882
883 /* unwind main stack */
884 dounwind (-1);
885 }
886
887 SvREFCNT_dec (GvSV (PL_defgv));
888 SvREFCNT_dec (GvAV (PL_defgv));
889 SvREFCNT_dec (GvSV (PL_errgv));
890 SvREFCNT_dec (PL_defoutgv);
891 SvREFCNT_dec (PL_rs);
892 SvREFCNT_dec (GvSV (irsgv));
893
894 SvREFCNT_dec (PL_diehook);
895 SvREFCNT_dec (PL_warnhook);
896
897 SvREFCNT_dec (coro->saved_deffh);
898 SvREFCNT_dec (coro->throw);
899
900 coro_destruct_stacks (aTHX);
901}
902
903static void
904free_coro_mortal (pTHX)
905{
906 if (expect_true (coro_mortal))
907 {
908 SvREFCNT_dec (coro_mortal);
909 coro_mortal = 0;
910 }
911}
912
913static int
914runops_trace (pTHX)
915{
916 COP *oldcop = 0;
917 int oldcxix = -2;
918 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
919 coro_cctx *cctx = coro->cctx;
920
921 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
922 {
923 PERL_ASYNC_CHECK ();
924
925 if (cctx->flags & CC_TRACE_ALL)
926 {
927 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
928 {
929 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
930 SV **bot, **top;
931 AV *av = newAV (); /* return values */
932 SV **cb;
933 dSP;
934
935 GV *gv = CvGV (cx->blk_sub.cv);
936 SV *fullname = sv_2mortal (newSV (0));
937 if (isGV (gv))
938 gv_efullname3 (fullname, gv, 0);
939
940 bot = PL_stack_base + cx->blk_oldsp + 1;
941 top = cx->blk_gimme == G_ARRAY ? SP + 1
942 : cx->blk_gimme == G_SCALAR ? bot + 1
943 : bot;
944
945 av_extend (av, top - bot);
946 while (bot < top)
947 av_push (av, SvREFCNT_inc_NN (*bot++));
948
949 PL_runops = RUNOPS_DEFAULT;
950 ENTER;
951 SAVETMPS;
952 EXTEND (SP, 3);
953 PUSHMARK (SP);
954 PUSHs (&PL_sv_no);
955 PUSHs (fullname);
956 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
957 PUTBACK;
958 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
959 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
960 SPAGAIN;
961 FREETMPS;
962 LEAVE;
963 PL_runops = runops_trace;
964 }
965
966 if (oldcop != PL_curcop)
967 {
968 oldcop = PL_curcop;
969
970 if (PL_curcop != &PL_compiling)
971 {
972 SV **cb;
973
974 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
975 {
976 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
977
978 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
979 {
980 runops_proc_t old_runops = PL_runops;
981 dSP;
982 GV *gv = CvGV (cx->blk_sub.cv);
983 SV *fullname = sv_2mortal (newSV (0));
984
985 if (isGV (gv))
986 gv_efullname3 (fullname, gv, 0);
987
988 PL_runops = RUNOPS_DEFAULT;
989 ENTER;
990 SAVETMPS;
991 EXTEND (SP, 3);
992 PUSHMARK (SP);
993 PUSHs (&PL_sv_yes);
994 PUSHs (fullname);
995 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
996 PUTBACK;
997 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
998 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
999 SPAGAIN;
1000 FREETMPS;
1001 LEAVE;
1002 PL_runops = runops_trace;
1003 }
1004
1005 oldcxix = cxstack_ix;
1006 }
1007
1008 if (cctx->flags & CC_TRACE_LINE)
1009 {
1010 dSP;
1011
1012 PL_runops = RUNOPS_DEFAULT;
1013 ENTER;
1014 SAVETMPS;
1015 EXTEND (SP, 3);
1016 PL_runops = RUNOPS_DEFAULT;
1017 PUSHMARK (SP);
1018 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1019 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1020 PUTBACK;
1021 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1022 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1023 SPAGAIN;
1024 FREETMPS;
1025 LEAVE;
1026 PL_runops = runops_trace;
1027 }
1028 }
1029 }
1030 }
1031 }
1032
1033 TAINT_NOT;
1034 return 0;
1035}
1036
1037static void
1038prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1039{
1040 ta->prev = (struct coro *)cctx;
1041 ta->next = 0;
1042}
1043
1044/* inject a fake call to Coro::State::_cctx_init into the execution */
1045/* _cctx_init should be careful, as it could be called at almost any time */
1046/* during execution of a perl program */
1047/* also initialises PL_top_env */
1048static void NOINLINE
1049cctx_prepare (pTHX_ coro_cctx *cctx)
1050{
535 dSP; 1051 dSP;
536 UNOP myop; 1052 UNOP myop;
537 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538 1053
539 coro_init_stacks (); 1054 PL_top_env = &PL_start_env;
540 /*PL_curcop = 0;*/
541 /*PL_in_eval = PL_in_eval;*/ /* inherit */
542 SvREFCNT_dec (GvAV (PL_defgv));
543 GvAV (PL_defgv) = coro->args; coro->args = 0;
544 1055
545 SPAGAIN; 1056 if (cctx->flags & CC_TRACE)
1057 PL_runops = runops_trace;
546 1058
547 Zero (&myop, 1, UNOP); 1059 Zero (&myop, 1, UNOP);
548 myop.op_next = Nullop; 1060 myop.op_next = PL_op;
549 myop.op_flags = OPf_WANT_VOID; 1061 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550 1062
1063 PUSHMARK (SP);
1064 EXTEND (SP, 2);
1065 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1066 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1067 PUTBACK;
551 PL_op = (OP *)&myop; 1068 PL_op = (OP *)&myop;
552
553 PUSHMARK(SP);
554 XPUSHs (sub_init);
555 PUTBACK;
556 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1069 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557 SPAGAIN; 1070 SPAGAIN;
558
559 ENTER; /* necessary e.g. for dounwind */
560} 1071}
561 1072
1073/* the tail of transfer: execute stuff we can only do after a transfer */
562static void 1074static void
1075transfer_tail (pTHX)
1076{
1077 struct coro *next = (struct coro *)transfer_next;
1078 transfer_next = 0; //D for temporary assertion in transfer
1079 assert (("FATAL ERROR: internal error 1067 in Coro module, please report", next));//D
1080
563free_coro_mortal () 1081 free_coro_mortal (aTHX);
564{ 1082 UNLOCK;
565 if (coro_mortal) 1083
566 { 1084 if (expect_false (next->throw))
567 SvREFCNT_dec (coro_mortal);
568 coro_mortal = 0;
569 } 1085 {
570} 1086 SV *exception = sv_2mortal (next->throw);
571 1087
1088 next->throw = 0;
1089 sv_setsv (ERRSV, exception);
1090 croak (0);
1091 }
1092}
1093
1094/*
1095 * this is a _very_ stripped down perl interpreter ;)
1096 */
572static void 1097static void
573prepare_cctx (coro_stack *cctx) 1098cctx_run (void *arg)
574{ 1099{
575 dSP; 1100#ifdef USE_ITHREADS
576 UNOP myop; 1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1106 dTHX;
577 1107
578 Zero (&myop, 1, UNOP); 1108 /* entersub called ENTER, but we never 'returned', undo that here */
579 myop.op_next = PL_op; 1109 LEAVE;
580 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581 1110
582 PUSHMARK(SP); 1111 /* we now skip the entersub that did lead to transfer() */
583 EXTEND (SP, 2); 1112 PL_op = PL_op->op_next;
584 PUSHs (newSViv (PTR2IV (cctx))); 1113
585 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1114 /* inject a fake subroutine call to cctx_init */
586 PUTBACK; 1115 cctx_prepare (aTHX_ (coro_cctx *)arg);
587 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1116
588 SPAGAIN; 1117 /* cctx_run is the alternative tail of transfer() */
1118 transfer_tail (aTHX);
1119
1120 /* somebody or something will hit me for both perl_run and PL_restartop */
1121 PL_restartop = PL_op;
1122 perl_run (PL_curinterp);
1123
1124 /*
1125 * If perl-run returns we assume exit() was being called or the coro
1126 * fell off the end, which seems to be the only valid (non-bug)
1127 * reason for perl_run to return. We try to exit by jumping to the
1128 * bootstrap-time "top" top_env, as we cannot restore the "main"
1129 * coroutine as Coro has no such concept
1130 */
1131 PL_top_env = main_top_env;
1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 }
1134}
1135
1136static coro_cctx *
1137cctx_new ()
1138{
1139 coro_cctx *cctx;
1140
1141 ++cctx_count;
1142 New (0, cctx, 1, coro_cctx);
1143
1144 cctx->gen = cctx_gen;
1145 cctx->flags = 0;
1146 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1147
1148 return cctx;
1149}
1150
1151/* create a new cctx only suitable as source */
1152static coro_cctx *
1153cctx_new_empty ()
1154{
1155 coro_cctx *cctx = cctx_new ();
1156
1157 cctx->sptr = 0;
1158 coro_create (&cctx->cctx, 0, 0, 0, 0);
1159
1160 return cctx;
1161}
1162
1163/* create a new cctx suitable as destination/running a perl interpreter */
1164static coro_cctx *
1165cctx_new_run ()
1166{
1167 coro_cctx *cctx = cctx_new ();
1168 void *stack_start;
1169 size_t stack_size;
1170
1171#if HAVE_MMAP
1172 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1173 /* mmap supposedly does allocate-on-write for us */
1174 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1175
1176 if (cctx->sptr != (void *)-1)
1177 {
1178# if CORO_STACKGUARD
1179 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1180# endif
1181 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1182 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1183 cctx->flags |= CC_MAPPED;
1184 }
1185 else
1186#endif
1187 {
1188 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1189 New (0, cctx->sptr, cctx_stacksize, long);
1190
1191 if (!cctx->sptr)
1192 {
1193 perror ("FATAL: unable to allocate stack for coroutine");
1194 _exit (EXIT_FAILURE);
1195 }
1196
1197 stack_start = cctx->sptr;
1198 stack_size = cctx->ssize;
1199 }
1200
1201 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1202 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1203
1204 return cctx;
589} 1205}
590 1206
591static void 1207static void
592coro_run (void *arg) 1208cctx_destroy (coro_cctx *cctx)
593{ 1209{
594 /* 1210 if (!cctx)
595 * this is a _very_ stripped down perl interpreter ;) 1211 return;
596 */
597 UNLOCK;
598 1212
599 PL_top_env = &PL_start_env; 1213 --cctx_count;
600 prepare_cctx ((coro_stack *)arg); 1214 coro_destroy (&cctx->cctx);
601 1215
602 /* somebody will hit me for both perl_run and PL_restartop */ 1216 /* coro_transfer creates new, empty cctx's */
603 perl_run (PERL_GET_CONTEXT); 1217 if (cctx->sptr)
604 1218 {
605 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1219#if CORO_USE_VALGRIND
606 abort (); 1220 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
607} 1221#endif
608
609static coro_stack *
610stack_new ()
611{
612 coro_stack *stack;
613
614 New (0, stack, 1, coro_stack);
615 1222
616#if HAVE_MMAP 1223#if HAVE_MMAP
617 1224 if (cctx->flags & CC_MAPPED)
618 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1225 munmap (cctx->sptr, cctx->ssize);
619 /* mmap suppsedly does allocate-on-write for us */ 1226 else
620 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621
622 if (stack->sptr == (void *)-1)
623 {
624 perror ("FATAL: unable to mmap stack for coroutine");
625 _exit (EXIT_FAILURE);
626 }
627
628# if STACKGUARD
629 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630# endif 1227#endif
631 1228 Safefree (cctx->sptr);
632#else
633
634 stack->ssize = STACKSIZE * (long)sizeof (long);
635 New (0, stack->sptr, STACKSIZE, long);
636
637 if (!stack->sptr)
638 { 1229 }
639 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1230
640 _exit (EXIT_FAILURE); 1231 Safefree (cctx);
1232}
1233
1234/* wether this cctx should be destructed */
1235#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1236
1237static coro_cctx *
1238cctx_get (pTHX)
1239{
1240 while (expect_true (cctx_first))
641 } 1241 {
1242 coro_cctx *cctx = cctx_first;
1243 cctx_first = cctx->next;
1244 --cctx_idle;
642 1245
643#endif 1246 if (expect_true (!CCTX_EXPIRED (cctx)))
1247 return cctx;
644 1248
645 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1249 cctx_destroy (cctx);
1250 }
646 1251
647 return stack; 1252 return cctx_new_run ();
648} 1253}
649 1254
650static void 1255static void
651stack_free (coro_stack *stack) 1256cctx_put (coro_cctx *cctx)
652{ 1257{
653 if (!stack) 1258 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
654 return;
655 1259
656#if HAVE_MMAP 1260 /* free another cctx if overlimit */
657 munmap (stack->sptr, stack->ssize); 1261 if (expect_false (cctx_idle >= cctx_max_idle))
658#else
659 Safefree (stack->sptr);
660#endif
661
662 Safefree (stack);
663}
664
665static coro_stack *stack_first;
666
667static coro_stack *
668stack_get ()
669{
670 coro_stack *stack;
671
672 if (stack_first)
673 {
674 stack = stack_first;
675 stack_first = stack->next;
676 }
677 else
678 { 1262 {
679 stack = stack_new (); 1263 coro_cctx *first = cctx_first;
680 PL_op = PL_op->op_next; 1264 cctx_first = first->next;
1265 --cctx_idle;
1266
1267 cctx_destroy (first);
681 } 1268 }
682 1269
683 return stack; 1270 ++cctx_idle;
1271 cctx->next = cctx_first;
1272 cctx_first = cctx;
684} 1273}
1274
1275/** coroutine switching *****************************************************/
685 1276
686static void 1277static void
687stack_put (coro_stack *stack) 1278transfer_check (pTHX_ struct coro *prev, struct coro *next)
688{ 1279{
689 stack->next = stack_first; 1280 if (expect_true (prev != next))
690 stack_first = stack; 1281 {
691} 1282 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1283 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
692 1284
693/* never call directly, always through the coro_state_transfer global variable */ 1285 if (expect_false (next->flags & CF_RUNNING))
694static void 1286 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1287
1288 if (expect_false (next->flags & CF_DESTROYED))
1289 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1290
1291#if !PERL_VERSION_ATLEAST (5,10,0)
1292 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1293 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1294#endif
1295 }
1296}
1297
1298/* always use the TRANSFER macro */
1299static void NOINLINE
695transfer_impl (struct coro *prev, struct coro *next, int flags) 1300transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
696{ 1301{
697 dSTACKLEVEL; 1302 dSTACKLEVEL;
698 1303
699 /* sometimes transfer is only called to set idle_sp */ 1304 /* sometimes transfer is only called to set idle_sp */
700 if (flags == TRANSFER_SET_STACKLEVEL) 1305 if (expect_false (!next))
1306 {
701 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1307 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
702 else if (prev != next) 1308 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
703 { 1309 }
1310 else if (expect_true (prev != next))
1311 {
704 coro_stack *prev__stack; 1312 coro_cctx *prev__cctx;
1313
1314 if (expect_false (prev->flags & CF_NEW))
1315 {
1316 /* create a new empty/source context */
1317 prev->cctx = cctx_new_empty ();
1318 prev->flags &= ~CF_NEW;
1319 prev->flags |= CF_RUNNING;
1320 }
1321
1322 prev->flags &= ~CF_RUNNING;
1323 next->flags |= CF_RUNNING;
705 1324
706 LOCK; 1325 LOCK;
707 1326
708 if (next->mainstack) 1327 /* first get rid of the old state */
1328 save_perl (aTHX_ prev);
1329
1330 if (expect_false (next->flags & CF_NEW))
709 { 1331 {
710 /* coroutine already started */ 1332 /* need to start coroutine */
711 SAVE (prev, flags); 1333 next->flags &= ~CF_NEW;
712 LOAD (next); 1334 /* setup coroutine call */
1335 coro_setup (aTHX_ next);
713 } 1336 }
714 else 1337 else
1338 load_perl (aTHX_ next);
1339
1340 prev__cctx = prev->cctx;
1341
1342 /* possibly untie and reuse the cctx */
1343 if (expect_true (
1344 prev__cctx->idle_sp == STACKLEVEL
1345 && !(prev__cctx->flags & CC_TRACE)
1346 && !force_cctx
1347 ))
715 { 1348 {
716 /* need to start coroutine */ 1349 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
717 /* first get rid of the old state */ 1350 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
718 SAVE (prev, -1); 1351
719 /* setup coroutine call */ 1352 prev->cctx = 0;
720 setup_coro (next); 1353
721 /* need a stack */ 1354 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
722 next->stack = 0; 1355 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1356 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1357 if (!next->cctx)
1358 next->cctx = cctx_get (aTHX);
1359
1360 cctx_put (prev__cctx);
723 } 1361 }
724 1362
725 if (!prev->stack) 1363 ++next->usecount;
726 /* create a new empty context */
727 Newz (0, prev->stack, 1, coro_stack);
728 1364
729 prev__stack = prev->stack; 1365 if (expect_true (!next->cctx))
1366 next->cctx = cctx_get (aTHX);
730 1367
731 /* possibly "free" the stack */ 1368 assert (("FATAL ERROR: internal error 1352 in Coro, please report", !transfer_next));//D
732 if (prev__stack->idle_sp == STACKLEVEL) 1369 transfer_next = next;
1370
1371 if (expect_false (prev__cctx != next->cctx))
733 { 1372 {
734 stack_put (prev__stack); 1373 prev__cctx->top_env = PL_top_env;
735 prev->stack = 0; 1374 PL_top_env = next->cctx->top_env;
1375 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
736 } 1376 }
737 1377
738 if (!next->stack) 1378 transfer_tail (aTHX);
739 next->stack = stack_get (); 1379 }
1380}
740 1381
741 if (prev__stack != next->stack) 1382#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
742 { 1383#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
743 prev__stack->top_env = PL_top_env;
744 PL_top_env = next->stack->top_env;
745 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
746 }
747 1384
748 free_coro_mortal (); 1385/** high level stuff ********************************************************/
749 1386
1387static int
1388coro_state_destroy (pTHX_ struct coro *coro)
1389{
1390 if (coro->flags & CF_DESTROYED)
1391 return 0;
1392
1393 coro->flags |= CF_DESTROYED;
1394
1395 if (coro->flags & CF_READY)
1396 {
1397 /* reduce nready, as destroying a ready coro effectively unreadies it */
1398 /* alternative: look through all ready queues and remove the coro */
1399 LOCK;
1400 --coro_nready;
750 UNLOCK; 1401 UNLOCK;
751 } 1402 }
752} 1403 else
753 1404 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
754/* use this function pointer to call the above function */
755/* this is done to increase chances of the compiler not inlining the call */
756/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759struct transfer_args
760{
761 struct coro *prev, *next;
762 int flags;
763};
764
765#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767static void
768coro_state_destroy (struct coro *coro)
769{
770 if (coro->refcnt--)
771 return;
772 1405
773 if (coro->mainstack && coro->mainstack != main_mainstack) 1406 if (coro->mainstack && coro->mainstack != main_mainstack)
774 { 1407 {
775 struct coro temp; 1408 struct coro temp;
776 1409
777 SAVE ((&temp), TRANSFER_SAVE_ALL); 1410 if (coro->flags & CF_RUNNING)
778 LOAD (coro); 1411 croak ("FATAL: tried to destroy currently running coroutine");
779 1412
780 destroy_stacks (); 1413 save_perl (aTHX_ &temp);
1414 load_perl (aTHX_ coro);
781 1415
782 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1416 coro_destruct (aTHX_ coro);
783 1417
1418 load_perl (aTHX_ &temp);
1419
784 coro->mainstack = 0; 1420 coro->slot = 0;
785 } 1421 }
786 1422
787 stack_free (coro->stack); 1423 cctx_destroy (coro->cctx);
788 SvREFCNT_dec (coro->args); 1424 SvREFCNT_dec (coro->args);
789 Safefree (coro); 1425
1426 if (coro->next) coro->next->prev = coro->prev;
1427 if (coro->prev) coro->prev->next = coro->next;
1428 if (coro == coro_first) coro_first = coro->next;
1429
1430 return 1;
790} 1431}
791 1432
792static int 1433static int
793coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1434coro_state_free (pTHX_ SV *sv, MAGIC *mg)
794{ 1435{
795 struct coro *coro = (struct coro *)mg->mg_ptr; 1436 struct coro *coro = (struct coro *)mg->mg_ptr;
796 mg->mg_ptr = 0; 1437 mg->mg_ptr = 0;
797 1438
1439 coro->hv = 0;
1440
1441 if (--coro->refcnt < 0)
1442 {
798 coro_state_destroy (coro); 1443 coro_state_destroy (aTHX_ coro);
1444 Safefree (coro);
1445 }
799 1446
800 return 0; 1447 return 0;
801} 1448}
802 1449
803static int 1450static int
… …
808 ++coro->refcnt; 1455 ++coro->refcnt;
809 1456
810 return 0; 1457 return 0;
811} 1458}
812 1459
813static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1460static MGVTBL coro_state_vtbl = {
814 1461 0, 0, 0, 0,
815static struct coro * 1462 coro_state_free,
816SvSTATE (SV *coro) 1463 0,
817{ 1464#ifdef MGf_DUP
818 HV *stash; 1465 coro_state_dup,
819 MAGIC *mg; 1466#else
820 1467# define MGf_DUP 0
821 if (SvROK (coro)) 1468#endif
822 coro = SvRV (coro); 1469};
823
824 stash = SvSTASH (coro);
825 if (stash != coro_stash && stash != coro_state_stash)
826 {
827 /* very slow, but rare, check */
828 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829 croak ("Coro::State object required");
830 }
831
832 mg = SvMAGIC (coro);
833 assert (mg->mg_type == PERL_MAGIC_ext);
834 return (struct coro *)mg->mg_ptr;
835}
836 1470
837static void 1471static void
838prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1472prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839{ 1473{
840 ta->prev = SvSTATE (prev); 1474 ta->prev = SvSTATE (prev_sv);
841 ta->next = SvSTATE (next); 1475 ta->next = SvSTATE (next_sv);
842 ta->flags = flags; 1476 TRANSFER_CHECK (*ta);
843} 1477}
844 1478
845static void 1479static void
846api_transfer (SV *prev, SV *next, int flags) 1480api_transfer (SV *prev_sv, SV *next_sv)
847{ 1481{
848 dTHX; 1482 dTHX;
849 struct transfer_args ta; 1483 struct transfer_args ta;
850 1484
851 prepare_transfer (&ta, prev, next, flags); 1485 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852 TRANSFER (ta); 1486 TRANSFER (ta, 1);
853} 1487}
854 1488
855/** Coro ********************************************************************/ 1489/** Coro ********************************************************************/
856 1490
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 1491static void
870coro_enq (SV *sv) 1492coro_enq (pTHX_ SV *coro_sv)
1493{
1494 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1495}
1496
1497static SV *
1498coro_deq (pTHX)
871{ 1499{
872 int prio; 1500 int prio;
873 1501
874 if (SvTYPE (sv) != SVt_PVHV)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877 prio = SvSTATE (sv)->prio;
878
879 av_push (coro_ready [prio - PRIO_MIN], sv);
880 coro_nready++;
881}
882
883static SV *
884coro_deq (int min_prio)
885{
886 int prio = PRIO_MAX - PRIO_MIN;
887
888 min_prio -= PRIO_MIN;
889 if (min_prio < 0)
890 min_prio = 0;
891
892 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1502 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
893 if (AvFILLp (coro_ready [prio]) >= 0) 1503 if (AvFILLp (coro_ready [prio]) >= 0)
894 {
895 coro_nready--;
896 return av_shift (coro_ready [prio]); 1504 return av_shift (coro_ready [prio]);
897 }
898 1505
899 return 0; 1506 return 0;
900} 1507}
901 1508
1509static int
1510api_ready (SV *coro_sv)
1511{
1512 dTHX;
1513 struct coro *coro;
1514 SV *sv_hook;
1515 void (*xs_hook)(void);
1516
1517 if (SvROK (coro_sv))
1518 coro_sv = SvRV (coro_sv);
1519
1520 coro = SvSTATE (coro_sv);
1521
1522 if (coro->flags & CF_READY)
1523 return 0;
1524
1525 coro->flags |= CF_READY;
1526
1527 LOCK;
1528
1529 sv_hook = coro_nready ? 0 : coro_readyhook;
1530 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1531
1532 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1533 ++coro_nready;
1534
1535 UNLOCK;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1555
1556 return 1;
1557}
1558
1559static int
1560api_is_ready (SV *coro_sv)
1561{
1562 dTHX;
1563 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1564}
1565
902static void 1566static void
903api_ready (SV *coro) 1567prepare_schedule (pTHX_ struct transfer_args *ta)
904{ 1568{
905 dTHX; 1569 SV *prev_sv, *next_sv;
906 1570
907 if (SvROK (coro)) 1571 for (;;)
908 coro = SvRV (coro); 1572 {
1573 LOCK;
1574 next_sv = coro_deq (aTHX);
1575
1576 /* nothing to schedule: call the idle handler */
1577 if (expect_false (!next_sv))
1578 {
1579 dSP;
1580 UNLOCK;
1581
1582 ENTER;
1583 SAVETMPS;
1584
1585 PUSHMARK (SP);
1586 PUTBACK;
1587 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1588 SPAGAIN;
1589
1590 FREETMPS;
1591 LEAVE;
1592 continue;
1593 }
1594
1595 ta->next = SvSTATE (next_sv);
1596
1597 /* cannot transfer to destroyed coros, skip and look for next */
1598 if (expect_false (ta->next->flags & CF_DESTROYED))
1599 {
1600 UNLOCK;
1601 SvREFCNT_dec (next_sv);
1602 /* coro_nready has already been taken care of by destroy */
1603 continue;
1604 }
1605
1606 --coro_nready;
1607 UNLOCK;
1608 break;
1609 }
1610
1611 /* free this only after the transfer */
1612 prev_sv = SvRV (coro_current);
1613 ta->prev = SvSTATE (prev_sv);
1614 TRANSFER_CHECK (*ta);
1615 assert (ta->next->flags & CF_READY);
1616 ta->next->flags &= ~CF_READY;
1617 SvRV_set (coro_current, next_sv);
909 1618
910 LOCK; 1619 LOCK;
911 coro_enq (SvREFCNT_inc (coro)); 1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
912 UNLOCK; 1622 UNLOCK;
913} 1623}
914 1624
915static void 1625static void
916prepare_schedule (struct transfer_args *ta)
917{
918 SV *current, *prev, *next;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925 next = coro_deq (PRIO_MIN);
926 UNLOCK;
927
928 if (next)
929 break;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 }
944 }
945
946 prev = SvRV (current);
947 SvRV (current) = next;
948
949 /* free this only after the transfer */
950 LOCK;
951 free_coro_mortal ();
952 UNLOCK;
953 coro_mortal = prev;
954
955 ta->prev = SvSTATE (prev);
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958}
959
960static void
961prepare_cede (struct transfer_args *ta) 1626prepare_cede (pTHX_ struct transfer_args *ta)
962{ 1627{
963 LOCK; 1628 api_ready (coro_current);
964 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 prepare_schedule (ta); 1629 prepare_schedule (aTHX_ ta);
1630}
1631
1632static int
1633prepare_cede_notself (pTHX_ struct transfer_args *ta)
1634{
1635 if (coro_nready)
1636 {
1637 SV *prev = SvRV (coro_current);
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (prev);
1640 return 1;
1641 }
1642 else
1643 return 0;
968} 1644}
969 1645
970static void 1646static void
971api_schedule (void) 1647api_schedule (void)
972{ 1648{
973 dTHX; 1649 dTHX;
974 struct transfer_args ta; 1650 struct transfer_args ta;
975 1651
976 prepare_schedule (&ta); 1652 prepare_schedule (aTHX_ &ta);
977 TRANSFER (ta); 1653 TRANSFER (ta, 1);
978} 1654}
979 1655
980static void 1656static int
981api_cede (void) 1657api_cede (void)
982{ 1658{
983 dTHX; 1659 dTHX;
984 struct transfer_args ta; 1660 struct transfer_args ta;
985 1661
986 prepare_cede (&ta); 1662 prepare_cede (aTHX_ &ta);
1663
1664 if (expect_true (ta.prev != ta.next))
1665 {
987 TRANSFER (ta); 1666 TRANSFER (ta, 1);
1667 return 1;
1668 }
1669 else
1670 return 0;
988} 1671}
989 1672
1673static int
1674api_cede_notself (void)
1675{
1676 dTHX;
1677 struct transfer_args ta;
1678
1679 if (prepare_cede_notself (aTHX_ &ta))
1680 {
1681 TRANSFER (ta, 1);
1682 return 1;
1683 }
1684 else
1685 return 0;
1686}
1687
1688static void
1689api_trace (SV *coro_sv, int flags)
1690{
1691 dTHX;
1692 struct coro *coro = SvSTATE (coro_sv);
1693
1694 if (flags & CC_TRACE)
1695 {
1696 if (!coro->cctx)
1697 coro->cctx = cctx_new_run ();
1698 else if (!(coro->cctx->flags & CC_TRACE))
1699 croak ("cannot enable tracing on coroutine with custom stack");
1700
1701 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1702 }
1703 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1704 {
1705 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1706
1707 if (coro->flags & CF_RUNNING)
1708 PL_runops = RUNOPS_DEFAULT;
1709 else
1710 coro->slot->runops = RUNOPS_DEFAULT;
1711 }
1712}
1713
1714#if 0
1715static int
1716coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1717{
1718 AV *padlist;
1719 AV *av = (AV *)mg->mg_obj;
1720
1721 abort ();
1722
1723 return 0;
1724}
1725
1726static MGVTBL coro_gensub_vtbl = {
1727 0, 0, 0, 0,
1728 coro_gensub_free
1729};
1730#endif
1731
1732/*****************************************************************************/
1733/* PerlIO::cede */
1734
1735typedef struct
1736{
1737 PerlIOBuf base;
1738 NV next, every;
1739} PerlIOCede;
1740
1741static IV
1742PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1743{
1744 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1745
1746 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1747 self->next = nvtime () + self->every;
1748
1749 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1750}
1751
1752static SV *
1753PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 return newSVnv (self->every);
1758}
1759
1760static IV
1761PerlIOCede_flush (pTHX_ PerlIO *f)
1762{
1763 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1764 double now = nvtime ();
1765
1766 if (now >= self->next)
1767 {
1768 api_cede ();
1769 self->next = now + self->every;
1770 }
1771
1772 return PerlIOBuf_flush (aTHX_ f);
1773}
1774
1775static PerlIO_funcs PerlIO_cede =
1776{
1777 sizeof(PerlIO_funcs),
1778 "cede",
1779 sizeof(PerlIOCede),
1780 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1781 PerlIOCede_pushed,
1782 PerlIOBuf_popped,
1783 PerlIOBuf_open,
1784 PerlIOBase_binmode,
1785 PerlIOCede_getarg,
1786 PerlIOBase_fileno,
1787 PerlIOBuf_dup,
1788 PerlIOBuf_read,
1789 PerlIOBuf_unread,
1790 PerlIOBuf_write,
1791 PerlIOBuf_seek,
1792 PerlIOBuf_tell,
1793 PerlIOBuf_close,
1794 PerlIOCede_flush,
1795 PerlIOBuf_fill,
1796 PerlIOBase_eof,
1797 PerlIOBase_error,
1798 PerlIOBase_clearerr,
1799 PerlIOBase_setlinebuf,
1800 PerlIOBuf_get_base,
1801 PerlIOBuf_bufsiz,
1802 PerlIOBuf_get_ptr,
1803 PerlIOBuf_get_cnt,
1804 PerlIOBuf_set_ptrcnt,
1805};
1806
1807
990MODULE = Coro::State PACKAGE = Coro::State 1808MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 1809
992PROTOTYPES: DISABLE 1810PROTOTYPES: DISABLE
993 1811
994BOOT: 1812BOOT:
995{ 1813{
996#ifdef USE_ITHREADS 1814#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 1815 MUTEX_INIT (&coro_lock);
1816# if CORO_PTHREAD
1817 coro_thx = PERL_GET_CONTEXT;
1818# endif
998#endif 1819#endif
999 BOOT_PAGESIZE; 1820 BOOT_PAGESIZE;
1000 1821
1822 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1823 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1824
1825 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1826 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1827 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1828
1829 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1830 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1831 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1832
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1833 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 1834
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1835 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1836 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1837 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1838 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 1839
1007 main_mainstack = PL_mainstack; 1840 main_mainstack = PL_mainstack;
1841 main_top_env = PL_top_env;
1008 1842
1843 while (main_top_env->je_prev)
1844 main_top_env = main_top_env->je_prev;
1845
1009 coroapi.ver = CORO_API_VERSION; 1846 coroapi.ver = CORO_API_VERSION;
1847 coroapi.rev = CORO_API_REVISION;
1010 coroapi.transfer = api_transfer; 1848 coroapi.transfer = api_transfer;
1849
1850 {
1851 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1852
1853 if (!svp) croak ("Time::HiRes is required");
1854 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1855
1856 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1857 }
1011 1858
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1859 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 1860}
1014 1861
1015SV * 1862SV *
1016new (char *klass, ...) 1863new (char *klass, ...)
1017 CODE: 1864 CODE:
1018{ 1865{
1019 struct coro *coro; 1866 struct coro *coro;
1867 MAGIC *mg;
1020 HV *hv; 1868 HV *hv;
1021 int i; 1869 int i;
1022 1870
1023 Newz (0, coro, 1, struct coro); 1871 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 1872 coro->args = newAV ();
1873 coro->flags = CF_NEW;
1025 1874
1875 if (coro_first) coro_first->prev = coro;
1876 coro->next = coro_first;
1877 coro_first = coro;
1878
1026 hv = newHV (); 1879 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1880 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1881 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1882 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 1883
1884 av_extend (coro->args, items - 1);
1030 for (i = 1; i < items; i++) 1885 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 1886 av_push (coro->args, newSVsv (ST (i)));
1032
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 1887}
1036 OUTPUT: 1888 OUTPUT:
1037 RETVAL 1889 RETVAL
1038 1890
1891# these not obviously related functions are all rolled into the same xs
1892# function to increase chances that they all will call transfer with the same
1893# stack offset
1039void 1894void
1040_set_stacklevel (...) 1895_set_stacklevel (...)
1041 ALIAS: 1896 ALIAS:
1042 Coro::State::transfer = 1 1897 Coro::State::transfer = 1
1043 Coro::schedule = 2 1898 Coro::schedule = 2
1044 Coro::cede = 3 1899 Coro::cede = 3
1045 Coro::Cont::yield = 4 1900 Coro::cede_notself = 4
1046 CODE: 1901 CODE:
1047{ 1902{
1048 struct transfer_args ta; 1903 struct transfer_args ta;
1049 1904
1905 PUTBACK;
1050 switch (ix) 1906 switch (ix)
1051 { 1907 {
1052 case 0: 1908 case 0:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1909 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1054 ta.next = 0;
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break; 1910 break;
1057 1911
1058 case 1: 1912 case 1:
1059 if (items != 3) 1913 if (items != 2)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1914 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1061 1915
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1916 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063 break; 1917 break;
1064 1918
1065 case 2: 1919 case 2:
1066 prepare_schedule (&ta); 1920 prepare_schedule (aTHX_ &ta);
1067 break; 1921 break;
1068 1922
1069 case 3: 1923 case 3:
1070 prepare_cede (&ta); 1924 prepare_cede (aTHX_ &ta);
1071 break; 1925 break;
1072 1926
1073 case 4: 1927 case 4:
1074 { 1928 if (!prepare_cede_notself (aTHX_ &ta))
1075 SV *yieldstack; 1929 XSRETURN_EMPTY;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078 1930
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break; 1931 break;
1098
1099 } 1932 }
1933 SPAGAIN;
1100 1934
1935 BARRIER;
1936 PUTBACK;
1101 TRANSFER (ta); 1937 TRANSFER (ta, 0);
1938 SPAGAIN; /* might be the sp of a different coroutine now */
1939 /* be extra careful not to ever do anything after TRANSFER */
1102} 1940}
1941
1942bool
1943_destroy (SV *coro_sv)
1944 CODE:
1945 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1946 OUTPUT:
1947 RETVAL
1103 1948
1104void 1949void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 1950_exit (int code)
1124 int code
1125 PROTOTYPE: $ 1951 PROTOTYPE: $
1126 CODE: 1952 CODE:
1127 _exit (code); 1953 _exit (code);
1128 1954
1955int
1956cctx_stacksize (int new_stacksize = 0)
1957 CODE:
1958 RETVAL = cctx_stacksize;
1959 if (new_stacksize)
1960 {
1961 cctx_stacksize = new_stacksize;
1962 ++cctx_gen;
1963 }
1964 OUTPUT:
1965 RETVAL
1966
1967int
1968cctx_max_idle (int max_idle = 0)
1969 CODE:
1970 RETVAL = cctx_max_idle;
1971 if (max_idle > 1)
1972 cctx_max_idle = max_idle;
1973 OUTPUT:
1974 RETVAL
1975
1976int
1977cctx_count ()
1978 CODE:
1979 RETVAL = cctx_count;
1980 OUTPUT:
1981 RETVAL
1982
1983int
1984cctx_idle ()
1985 CODE:
1986 RETVAL = cctx_idle;
1987 OUTPUT:
1988 RETVAL
1989
1990void
1991list ()
1992 PPCODE:
1993{
1994 struct coro *coro;
1995 for (coro = coro_first; coro; coro = coro->next)
1996 if (coro->hv)
1997 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1998}
1999
2000void
2001call (Coro::State coro, SV *coderef)
2002 ALIAS:
2003 eval = 1
2004 CODE:
2005{
2006 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2007 {
2008 struct coro temp;
2009
2010 if (!(coro->flags & CF_RUNNING))
2011 {
2012 PUTBACK;
2013 save_perl (aTHX_ &temp);
2014 load_perl (aTHX_ coro);
2015 }
2016
2017 {
2018 dSP;
2019 ENTER;
2020 SAVETMPS;
2021 PUTBACK;
2022 PUSHSTACK;
2023 PUSHMARK (SP);
2024
2025 if (ix)
2026 eval_sv (coderef, 0);
2027 else
2028 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2029
2030 POPSTACK;
2031 SPAGAIN;
2032 FREETMPS;
2033 LEAVE;
2034 PUTBACK;
2035 }
2036
2037 if (!(coro->flags & CF_RUNNING))
2038 {
2039 save_perl (aTHX_ coro);
2040 load_perl (aTHX_ &temp);
2041 SPAGAIN;
2042 }
2043 }
2044}
2045
2046SV *
2047is_ready (Coro::State coro)
2048 PROTOTYPE: $
2049 ALIAS:
2050 is_ready = CF_READY
2051 is_running = CF_RUNNING
2052 is_new = CF_NEW
2053 is_destroyed = CF_DESTROYED
2054 CODE:
2055 RETVAL = boolSV (coro->flags & ix);
2056 OUTPUT:
2057 RETVAL
2058
2059void
2060throw (Coro::State self, SV *throw = &PL_sv_undef)
2061 PROTOTYPE: $;$
2062 CODE:
2063 SvREFCNT_dec (self->throw);
2064 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2065
2066void
2067api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2068
2069SV *
2070has_cctx (Coro::State coro)
2071 PROTOTYPE: $
2072 CODE:
2073 RETVAL = boolSV (!!coro->cctx);
2074 OUTPUT:
2075 RETVAL
2076
2077int
2078is_traced (Coro::State coro)
2079 PROTOTYPE: $
2080 CODE:
2081 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2082 OUTPUT:
2083 RETVAL
2084
2085UV
2086rss (Coro::State coro)
2087 PROTOTYPE: $
2088 ALIAS:
2089 usecount = 1
2090 CODE:
2091 switch (ix)
2092 {
2093 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2094 case 1: RETVAL = coro->usecount; break;
2095 }
2096 OUTPUT:
2097 RETVAL
2098
2099void
2100force_cctx ()
2101 CODE:
2102 struct coro *coro = SvSTATE (coro_current);
2103 coro->cctx->idle_sp = 0;
2104
2105void
2106swap_defsv (Coro::State self)
2107 PROTOTYPE: $
2108 ALIAS:
2109 swap_defav = 1
2110 CODE:
2111 if (!self->slot)
2112 croak ("cannot swap state with coroutine that has no saved state");
2113 else
2114 {
2115 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2116 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2117
2118 SV *tmp = *src; *src = *dst; *dst = tmp;
2119 }
2120
1129MODULE = Coro::State PACKAGE = Coro 2121MODULE = Coro::State PACKAGE = Coro
1130 2122
1131BOOT: 2123BOOT:
1132{ 2124{
1133 int i; 2125 int i;
1134 2126
2127 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2128 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2129 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2130
2131 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2132 SvREADONLY_on (coro_current);
2133
1135 coro_stash = gv_stashpv ("Coro", TRUE); 2134 coro_stash = gv_stashpv ("Coro", TRUE);
1136 2135
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2138 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2139 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2140 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2141 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 2142
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2143 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 2144 coro_ready[i] = newAV ();
1149 2145
1150 { 2146 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 2147 SV *sv = perl_get_sv ("Coro::API", TRUE);
2148 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1152 2149
1153 coroapi.schedule = api_schedule; 2150 coroapi.schedule = api_schedule;
1154 coroapi.cede = api_cede; 2151 coroapi.cede = api_cede;
2152 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 2153 coroapi.ready = api_ready;
2154 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 2155 coroapi.nready = &coro_nready;
1157 coroapi.current = coro_current; 2156 coroapi.current = coro_current;
1158 2157
1159 GCoroAPI = &coroapi; 2158 GCoroAPI = &coroapi;
1160 sv_setiv (sv, (IV)&coroapi); 2159 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 2160 SvREADONLY_on (sv);
1162 } 2161 }
1163} 2162}
2163
2164void
2165_set_current (SV *current)
2166 PROTOTYPE: $
2167 CODE:
2168 SvREFCNT_dec (SvRV (coro_current));
2169 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2170
2171void
2172_set_readyhook (SV *hook)
2173 PROTOTYPE: $
2174 CODE:
2175 LOCK;
2176 SvREFCNT_dec (coro_readyhook);
2177 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2178 UNLOCK;
1164 2179
1165int 2180int
1166prio (Coro::State coro, int newprio = 0) 2181prio (Coro::State coro, int newprio = 0)
1167 ALIAS: 2182 ALIAS:
1168 nice = 1 2183 nice = 1
… …
1171 RETVAL = coro->prio; 2186 RETVAL = coro->prio;
1172 2187
1173 if (items > 1) 2188 if (items > 1)
1174 { 2189 {
1175 if (ix) 2190 if (ix)
1176 newprio += coro->prio; 2191 newprio = coro->prio - newprio;
1177 2192
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2193 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2194 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 2195
1181 coro->prio = newprio; 2196 coro->prio = newprio;
1182 } 2197 }
1183} 2198}
2199 OUTPUT:
2200 RETVAL
1184 2201
1185void 2202SV *
1186ready (SV *self) 2203ready (SV *self)
1187 PROTOTYPE: $ 2204 PROTOTYPE: $
1188 CODE: 2205 CODE:
1189 api_ready (self); 2206 RETVAL = boolSV (api_ready (self));
2207 OUTPUT:
2208 RETVAL
1190 2209
1191int 2210int
1192nready (...) 2211nready (...)
1193 PROTOTYPE: 2212 PROTOTYPE:
1194 CODE: 2213 CODE:
1195 RETVAL = coro_nready; 2214 RETVAL = coro_nready;
1196 OUTPUT: 2215 OUTPUT:
1197 RETVAL 2216 RETVAL
1198 2217
1199MODULE = Coro::State PACKAGE = Coro::AIO 2218# for async_pool speedup
2219void
2220_pool_1 (SV *cb)
2221 CODE:
2222{
2223 struct coro *coro = SvSTATE (coro_current);
2224 HV *hv = (HV *)SvRV (coro_current);
2225 AV *defav = GvAV (PL_defgv);
2226 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2227 AV *invoke_av;
2228 int i, len;
2229
2230 if (!invoke)
2231 {
2232 SV *old = PL_diehook;
2233 PL_diehook = 0;
2234 SvREFCNT_dec (old);
2235 croak ("\3async_pool terminate\2\n");
2236 }
2237
2238 SvREFCNT_dec (coro->saved_deffh);
2239 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2240
2241 hv_store (hv, "desc", sizeof ("desc") - 1,
2242 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2243
2244 invoke_av = (AV *)SvRV (invoke);
2245 len = av_len (invoke_av);
2246
2247 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2248
2249 if (len > 0)
2250 {
2251 av_fill (defav, len - 1);
2252 for (i = 0; i < len; ++i)
2253 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2254 }
2255
2256 SvREFCNT_dec (invoke);
2257}
2258
2259void
2260_pool_2 (SV *cb)
2261 CODE:
2262{
2263 struct coro *coro = SvSTATE (coro_current);
2264
2265 sv_setsv (cb, &PL_sv_undef);
2266
2267 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2268 coro->saved_deffh = 0;
2269
2270 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2271 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2272 {
2273 SV *old = PL_diehook;
2274 PL_diehook = 0;
2275 SvREFCNT_dec (old);
2276 croak ("\3async_pool terminate\2\n");
2277 }
2278
2279 av_clear (GvAV (PL_defgv));
2280 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2281 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2282
2283 coro->prio = 0;
2284
2285 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2286 api_trace (coro_current, 0);
2287
2288 av_push (av_async_pool, newSVsv (coro_current));
2289}
2290
2291#if 0
2292
2293void
2294_generator_call (...)
2295 PROTOTYPE: @
2296 PPCODE:
2297 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2298 xxxx
2299 abort ();
1200 2300
1201SV * 2301SV *
1202_get_state () 2302gensub (SV *sub, ...)
1203 CODE: 2303 PROTOTYPE: &;@
2304 CODE:
1204{ 2305{
1205 struct { 2306 struct coro *coro;
1206 int errorno; 2307 MAGIC *mg;
1207 int laststype; 2308 CV *xcv;
1208 int laststatval; 2309 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1209 Stat_t statcache; 2310 int i;
1210 } data;
1211 2311
1212 data.errorno = errno; 2312 CvGV (ncv) = CvGV (cv);
1213 data.laststype = PL_laststype; 2313 CvFILE (ncv) = CvFILE (cv);
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216 2314
1217 RETVAL = newSVpvn ((char *)&data, sizeof data); 2315 Newz (0, coro, 1, struct coro);
2316 coro->args = newAV ();
2317 coro->flags = CF_NEW;
2318
2319 av_extend (coro->args, items - 1);
2320 for (i = 1; i < items; i++)
2321 av_push (coro->args, newSVsv (ST (i)));
2322
2323 CvISXSUB_on (ncv);
2324 CvXSUBANY (ncv).any_ptr = (void *)coro;
2325
2326 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2327
2328 CvXSUB (ncv) = CvXSUB (xcv);
2329 CvANON_on (ncv);
2330
2331 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2332 RETVAL = newRV_noinc ((SV *)ncv);
1218} 2333}
1219 OUTPUT: 2334 OUTPUT:
1220 RETVAL 2335 RETVAL
1221 2336
2337#endif
2338
2339
2340MODULE = Coro::State PACKAGE = Coro::AIO
2341
1222void 2342void
1223_set_state (char *data_) 2343_get_state (SV *self)
2344 PPCODE:
2345{
2346 AV *defav = GvAV (PL_defgv);
2347 AV *av = newAV ();
2348 int i;
2349 SV *data_sv = newSV (sizeof (struct io_state));
2350 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2351 SvCUR_set (data_sv, sizeof (struct io_state));
2352 SvPOK_only (data_sv);
2353
2354 data->errorno = errno;
2355 data->laststype = PL_laststype;
2356 data->laststatval = PL_laststatval;
2357 data->statcache = PL_statcache;
2358
2359 av_extend (av, AvFILLp (defav) + 1 + 1);
2360
2361 for (i = 0; i <= AvFILLp (defav); ++i)
2362 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2363
2364 av_push (av, data_sv);
2365
2366 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2367
2368 api_ready (self);
2369}
2370
2371void
2372_set_state (SV *state)
1224 PROTOTYPE: $ 2373 PROTOTYPE: $
2374 PPCODE:
2375{
2376 AV *av = (AV *)SvRV (state);
2377 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2378 int i;
2379
2380 errno = data->errorno;
2381 PL_laststype = data->laststype;
2382 PL_laststatval = data->laststatval;
2383 PL_statcache = data->statcache;
2384
2385 EXTEND (SP, AvFILLp (av));
2386 for (i = 0; i < AvFILLp (av); ++i)
2387 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2388}
2389
2390
2391MODULE = Coro::State PACKAGE = Coro::AnyEvent
2392
2393BOOT:
2394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2395
2396SV *
2397_schedule (...)
2398 PROTOTYPE: @
1225 CODE: 2399 CODE:
1226{ 2400{
1227 struct { 2401 static int incede;
1228 int errorno;
1229 int laststype;
1230 int laststatval;
1231 Stat_t statcache;
1232 } *data = (void *)data_;
1233 2402
1234 errno = data->errorno; 2403 api_cede_notself ();
1235 PL_laststype = data->laststype; 2404
1236 PL_laststatval = data->laststatval; 2405 ++incede;
1237 PL_statcache = data->statcache; 2406 while (coro_nready >= incede && api_cede ())
2407 ;
2408
2409 sv_setsv (sv_activity, &PL_sv_undef);
2410 if (coro_nready >= incede)
2411 {
2412 PUSHMARK (SP);
2413 PUTBACK;
2414 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2415 SPAGAIN;
2416 }
2417
2418 --incede;
1238} 2419}
2420
2421
2422MODULE = Coro::State PACKAGE = PerlIO::cede
2423
2424BOOT:
2425 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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