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Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.259 by root, Mon Nov 10 00:02:29 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
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
9#if USE_VALGRIND 49#if CORO_USE_VALGRIND
10# include <valgrind/valgrind.h> 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)
11#endif 54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
12 58
13#define PERL_VERSION_ATLEAST(a,b,c) \ 59#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \ 60 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \ 61 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \ 62 && (PERL_VERSION > (b) \
… …
35# ifndef IS_PADCONST 81# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
37# endif 83# endif
38#endif 84#endif
39 85
40#include <stdio.h> 86/* 5.11 */
41#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
42 108
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD 110# undef CORO_STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h>
53# include <sys/mman.h>
54# ifndef MAP_ANONYMOUS
55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif
60# endif 111#endif
61# include <limits.h> 112
62# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
63# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE
68# endif 115#endif
69#endif
70 116
71/* The next macro should declare a variable stacklevel that contains and approximation 117/* prefer perl internal functions over our own? */
72 * to the current C stack pointer. Its property is that it changes with each call 118#ifndef CORO_PREFER_PERL_FUNCTIONS
73 * and should be unique. */ 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. */
74#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
75#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
76 126
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
78 128
79#if __GNUC__ >= 3 129#if __GNUC__ >= 3
80# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
81#else 133#else
82# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
83#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
84 141
85#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
86 143
87#include "CoroAPI.h" 144#include "CoroAPI.h"
88 145
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90
91#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
92static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
95#else 155#else
156
96# define LOCK (void)0 157# define LOCK (void)0
97# define UNLOCK (void)0 158# define UNLOCK (void)0
98#endif
99 159
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;
100static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
101static 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;
102static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
103static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile char next_has_throw; /* speedup flag for next->throw check */
187
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
104 213
105/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 215typedef struct coro_cctx {
107 struct coro_stack *next; 216 struct coro_cctx *next;
108 217
109 /* the stack */ 218 /* the stack */
110 void *sptr; 219 void *sptr;
111 long ssize; /* positive == mmap, otherwise malloc */ 220 size_t ssize;
112 221
113 /* cpu state */ 222 /* cpu state */
114 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
115 JMPENV *top_env; 225 JMPENV *top_env;
116 coro_context cctx; 226 coro_context cctx;
117 227
228 U32 gen;
118#if USE_VALGRIND 229#if CORO_USE_VALGRIND
119 int valgrind_id; 230 int valgrind_id;
120#endif 231#endif
121} coro_stack; 232 unsigned char flags;
233} coro_cctx;
234
235enum {
236 CF_RUNNING = 0x0001, /* coroutine is running */
237 CF_READY = 0x0002, /* coroutine is ready */
238 CF_NEW = 0x0004, /* has never been switched to */
239 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
240};
241
242/* the structure where most of the perl state is stored, overlaid on the cxstack */
243typedef struct {
244 SV *defsv;
245 AV *defav;
246 SV *errsv;
247 SV *irsgv;
248#define VAR(name,type) type name;
249# include "state.h"
250#undef VAR
251} perl_slots;
252
253#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122 254
123/* this is a structure representing a perl-level coroutine */ 255/* this is a structure representing a perl-level coroutine */
124struct coro { 256struct coro {
125 /* the c coroutine allocated to this perl coroutine, if any */ 257 /* the c coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 258 coro_cctx *cctx;
127 259
128 /* data associated with this coroutine (initial args) */ 260 /* process data */
129 AV *args;
130 int refcnt;
131
132 /* optionally saved, might be zero */
133 AV *defav;
134 SV *defsv;
135 SV *errsv;
136
137 /* saved global state not related to stacks */
138 U8 dowarn;
139 I32 in_eval;
140
141 /* the stacks and related info (callchain etc..) */
142 PERL_SI *curstackinfo;
143 AV *curstack;
144 AV *mainstack; 261 AV *mainstack;
145 SV **stack_sp; 262 perl_slots *slot; /* basically the saved sp */
146 OP *op; 263
147 SV **curpad; 264 AV *args; /* data associated with this coroutine (initial args) */
148 AV *comppad; 265 int refcnt; /* coroutines are refcounted, yes */
149 CV *compcv; 266 int flags; /* CF_ flags */
150 SV **stack_base; 267 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 268
152 SV **tmps_stack; 269 /* statistics */
153 I32 tmps_floor; 270 int usecount; /* number of transfers to this coro */
154 I32 tmps_ix;
155 I32 tmps_max;
156 I32 *markstack;
157 I32 *markstack_ptr;
158 I32 *markstack_max;
159 I32 *scopestack;
160 I32 scopestack_ix;
161 I32 scopestack_max;
162 ANY *savestack;
163 I32 savestack_ix;
164 I32 savestack_max;
165 OP **retstack;
166 I32 retstack_ix;
167 I32 retstack_max;
168 PMOP *curpm;
169 COP *curcop;
170 271
171 /* coro process data */ 272 /* coro process data */
172 int prio; 273 int prio;
274 SV *throw; /* exception to be thrown */
275
276 /* async_pool */
277 SV *saved_deffh;
278
279 /* linked list */
280 struct coro *next, *prev;
173}; 281};
174 282
175typedef struct coro *Coro__State; 283typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 284typedef struct coro *Coro__State_or_hashref;
177 285
286/** Coro ********************************************************************/
287
288#define PRIO_MAX 3
289#define PRIO_HIGH 1
290#define PRIO_NORMAL 0
291#define PRIO_LOW -1
292#define PRIO_IDLE -3
293#define PRIO_MIN -4
294
295/* for Coro.pm */
296static SV *coro_current;
297static SV *coro_readyhook;
298static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
299static int coro_nready;
300static struct coro *coro_first;
301
302/** lowlevel stuff **********************************************************/
303
304static SV *
305coro_get_sv (pTHX_ const char *name, int create)
306{
307#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_sv (name, create);
310#endif
311 return get_sv (name, create);
312}
313
178static AV * 314static AV *
315coro_get_av (pTHX_ const char *name, int create)
316{
317#if PERL_VERSION_ATLEAST (5,10,0)
318 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
319 get_av (name, create);
320#endif
321 return get_av (name, create);
322}
323
324static HV *
325coro_get_hv (pTHX_ const char *name, int create)
326{
327#if PERL_VERSION_ATLEAST (5,10,0)
328 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
329 get_hv (name, create);
330#endif
331 return get_hv (name, create);
332}
333
334static AV *
179coro_clone_padlist (CV *cv) 335coro_clone_padlist (pTHX_ CV *cv)
180{ 336{
181 AV *padlist = CvPADLIST (cv); 337 AV *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 338 AV *newpadlist, *newpad;
183 339
184 newpadlist = newAV (); 340 newpadlist = newAV ();
185 AvREAL_off (newpadlist); 341 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0) 342#if PERL_VERSION_ATLEAST (5,10,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 343 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else 344#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 346#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 347 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
192 --AvFILLp (padlist); 348 --AvFILLp (padlist);
193 349
194 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 350 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
195 av_store (newpadlist, 1, (SV *)newpad); 351 av_store (newpadlist, 1, (SV *)newpad);
196 352
197 return newpadlist; 353 return newpadlist;
198} 354}
199 355
200static void 356static void
201free_padlist (AV *padlist) 357free_padlist (pTHX_ AV *padlist)
202{ 358{
203 /* may be during global destruction */ 359 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 360 if (SvREFCNT (padlist))
205 { 361 {
206 I32 i = AvFILLp (padlist); 362 I32 i = AvFILLp (padlist);
… …
227 AV *padlist; 383 AV *padlist;
228 AV *av = (AV *)mg->mg_obj; 384 AV *av = (AV *)mg->mg_obj;
229 385
230 /* casting is fun. */ 386 /* casting is fun. */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 387 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232 free_padlist (padlist); 388 free_padlist (aTHX_ padlist);
233 389
234 SvREFCNT_dec (av); 390 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
235 391
236 return 0; 392 return 0;
237} 393}
238 394
239#define PERL_MAGIC_coro PERL_MAGIC_ext 395#define CORO_MAGIC_type_cv PERL_MAGIC_ext
396#define CORO_MAGIC_type_state PERL_MAGIC_ext
240 397
241static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 398static MGVTBL coro_cv_vtbl = {
399 0, 0, 0, 0,
400 coro_cv_free
401};
402
403#define CORO_MAGIC(sv, type) \
404 SvMAGIC (sv) \
405 ? SvMAGIC (sv)->mg_type == type \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type) \
408 : 0
409
410#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
411#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
412
413static struct coro *
414SvSTATE_ (pTHX_ SV *coro)
415{
416 HV *stash;
417 MAGIC *mg;
418
419 if (SvROK (coro))
420 coro = SvRV (coro);
421
422 if (expect_false (SvTYPE (coro) != SVt_PVHV))
423 croak ("Coro::State object required");
424
425 stash = SvSTASH (coro);
426 if (expect_false (stash != coro_stash && stash != coro_state_stash))
427 {
428 /* very slow, but rare, check */
429 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
430 croak ("Coro::State object required");
431 }
432
433 mg = CORO_MAGIC_state (coro);
434 return (struct coro *)mg->mg_ptr;
435}
436
437#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
242 438
243/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
244static void 440static void
245get_padlist (CV *cv) 441get_padlist (pTHX_ CV *cv)
246{ 442{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
248 445
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251 else 448 else
252 { 449 {
253#if 0 450#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
259#else 457#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261#endif 459#endif
262 } 460 }
263} 461}
264 462
265static void 463static void
266put_padlist (CV *cv) 464put_padlist (pTHX_ CV *cv)
267{ 465{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
269 468
270 if (!mg) 469 if (expect_false (!mg))
271 { 470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274 mg->mg_virtual = &vtbl_coro;
275 mg->mg_obj = (SV *)newAV ();
276 }
277 471
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 472 av = (AV *)mg->mg_obj;
279}
280 473
281#define SB do { 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
282#define SE } while (0) 475 av_extend (av, AvMAX (av) + 1);
283 476
284#define LOAD(state) load_state((state)); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285#define SAVE(state,flags) save_state((state),(flags)); 478}
286 479
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 480/** load & save, init *******************************************************/
288 481
289static void 482static void
290load_state(Coro__State c) 483load_perl (pTHX_ Coro__State c)
291{ 484{
292 PL_dowarn = c->dowarn; 485 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 486 c->slot = 0;
294 487
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 488 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_comppad = c->comppad;
302 PL_compcv = c->compcv;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318#if !PERL_VERSION_ATLEAST (5,9,0)
319 PL_retstack = c->retstack;
320 PL_retstack_ix = c->retstack_ix;
321 PL_retstack_max = c->retstack_max;
322#endif
323 PL_curpm = c->curpm;
324 PL_curcop = c->curcop;
325 489
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 490 GvSV (PL_defgv) = slot->defsv;
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 491 GvAV (PL_defgv) = slot->defav;
328 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
495 #define VAR(name,type) PL_ ## name = slot->name;
496 # include "state.h"
497 #undef VAR
329 498
330 { 499 {
331 dSP; 500 dSP;
501
332 CV *cv; 502 CV *cv;
333 503
334 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
336 { 506 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 508 CvDEPTH (cv) = PTR2IV (POPs);
343 } 509 CvPADLIST (cv) = (AV *)POPs;
344
345 ++CvDEPTH(cv);
346 } 510 }
347 511
348 PUTBACK; 512 PUTBACK;
349 } 513 }
350} 514}
351 515
352static void 516static void
353save_state(Coro__State c, int flags) 517save_perl (pTHX_ Coro__State c)
354{ 518{
355 { 519 {
356 dSP; 520 dSP;
357 I32 cxix = cxstack_ix; 521 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 522 PERL_CONTEXT *ccstk = cxstack;
… …
361 /* 525 /*
362 * the worst thing you can imagine happens first - we have to save 526 * the worst thing you can imagine happens first - we have to save
363 * (and reinitialize) all cv's in the whole callchain :( 527 * (and reinitialize) all cv's in the whole callchain :(
364 */ 528 */
365 529
366 PUSHs (Nullsv); 530 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 531 /* this loop was inspired by pp_caller */
368 for (;;) 532 for (;;)
369 { 533 {
370 while (cxix >= 0) 534 while (expect_true (cxix >= 0))
371 { 535 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 536 PERL_CONTEXT *cx = &ccstk[cxix--];
373 537
374 if (CxTYPE(cx) == CXt_SUB) 538 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 539 {
376 CV *cv = cx->blk_sub.cv; 540 CV *cv = cx->blk_sub.cv;
541
377 if (CvDEPTH(cv)) 542 if (expect_true (CvDEPTH (cv)))
378 { 543 {
379 EXTEND (SP, CvDEPTH(cv)*2); 544 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 545 PUSHs ((SV *)CvPADLIST (cv));
546 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 547 PUSHs ((SV *)cv);
390 548
549 CvDEPTH (cv) = 0;
391 get_padlist (cv); 550 get_padlist (aTHX_ cv);
392 } 551 }
393 } 552 }
394#ifdef CXt_FORMAT
395 else if (CxTYPE(cx) == CXt_FORMAT)
396 {
397 /* I never used formats, so how should I know how these are implemented? */
398 /* my bold guess is as a simple, plain sub... */
399 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400 }
401#endif
402 } 553 }
403 554
404 if (top_si->si_type == PERLSI_MAIN) 555 if (expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 556 break;
406 557
407 top_si = top_si->si_prev; 558 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 559 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 560 cxix = top_si->si_cxix;
410 } 561 }
411 562
412 PUTBACK; 563 PUTBACK;
413 } 564 }
414 565
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 566 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 567 /* we manually unroll here, as usually 2 slots is enough */
417 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 568 if (SLOT_COUNT >= 1) CXINC;
569 if (SLOT_COUNT >= 2) CXINC;
570 if (SLOT_COUNT >= 3) CXINC;
571 {
572 int i;
573 for (i = 3; i < SLOT_COUNT; ++i)
574 CXINC;
575 }
576 cxstack_ix -= SLOT_COUNT; /* undo allocation */
418 577
419 c->dowarn = PL_dowarn;
420 c->in_eval = PL_in_eval;
421
422 c->curstackinfo = PL_curstackinfo;
423 c->curstack = PL_curstack;
424 c->mainstack = PL_mainstack; 578 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 579
426 c->op = PL_op; 580 {
427 c->curpad = PL_curpad; 581 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 582
429 c->compcv = PL_compcv; 583 slot->defav = GvAV (PL_defgv);
430 c->stack_base = PL_stack_base; 584 slot->defsv = DEFSV;
431 c->stack_max = PL_stack_max; 585 slot->errsv = ERRSV;
432 c->tmps_stack = PL_tmps_stack; 586 slot->irsgv = GvSV (irsgv);
433 c->tmps_floor = PL_tmps_floor; 587
434 c->tmps_ix = PL_tmps_ix; 588 #define VAR(name,type) slot->name = PL_ ## name;
435 c->tmps_max = PL_tmps_max; 589 # include "state.h"
436 c->markstack = PL_markstack; 590 #undef VAR
437 c->markstack_ptr = PL_markstack_ptr; 591 }
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445#if !PERL_VERSION_ATLEAST (5,9,0)
446 c->retstack = PL_retstack;
447 c->retstack_ix = PL_retstack_ix;
448 c->retstack_max = PL_retstack_max;
449#endif
450 c->curpm = PL_curpm;
451 c->curcop = PL_curcop;
452} 592}
453 593
454/* 594/*
455 * allocate various perl stacks. This is an exact copy 595 * allocate various perl stacks. This is an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 596 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 597 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 598 * not usually need a lot of stackspace.
459 */ 599 */
600#if CORO_PREFER_PERL_FUNCTIONS
601# define coro_init_stacks init_stacks
602#else
460static void 603static void
461coro_init_stacks () 604coro_init_stacks (pTHX)
462{ 605{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 606 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 607 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 608 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 609 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 610
468 PL_stack_base = AvARRAY(PL_curstack); 611 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 612 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 613 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 614
472 New(50,PL_tmps_stack,96,SV*); 615 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 616 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 617 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 618 PL_tmps_max = 32;
476 619
477 New(54,PL_markstack,16,I32); 620 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 621 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 622 PL_markstack_max = PL_markstack + 16;
480 623
481#ifdef SET_MARK_OFFSET 624#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 625 SET_MARK_OFFSET;
483#endif 626#endif
484 627
485 New(54,PL_scopestack,16,I32); 628 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 629 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 630 PL_scopestack_max = 8;
488 631
489 New(54,PL_savestack,96,ANY); 632 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 633 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 634 PL_savestack_max = 24;
492 635
493#if !PERL_VERSION_ATLEAST (5,9,0) 636#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 637 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 638 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 639 PL_retstack_max = 4;
497#endif 640#endif
498} 641}
642#endif
499 643
500/* 644/*
501 * destroy the stacks, the callchain etc... 645 * destroy the stacks, the callchain etc...
502 */ 646 */
503static void 647static void
504coro_destroy_stacks() 648coro_destruct_stacks (pTHX)
505{ 649{
506 if (!IN_DESTRUCT)
507 {
508 /* is this ugly, I ask? */
509 LEAVE_SCOPE (0);
510
511 /* sure it is, but more important: is it correct?? :/ */
512 FREETMPS;
513
514 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515 }
516
517 while (PL_curstackinfo->si_next) 650 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 651 PL_curstackinfo = PL_curstackinfo->si_next;
519 652
520 while (PL_curstackinfo) 653 while (PL_curstackinfo)
521 { 654 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 655 PERL_SI *p = PL_curstackinfo->si_prev;
523 656
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 657 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 658 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 659
536 Safefree (PL_curstackinfo->si_cxstack); 660 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 661 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 662 PL_curstackinfo = p;
539 } 663 }
540 664
541 Safefree (PL_tmps_stack); 665 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 666 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 667 Safefree (PL_scopestack);
544 Safefree (PL_savestack); 668 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 669#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 670 Safefree (PL_retstack);
547#endif 671#endif
548} 672}
549 673
674static size_t
675coro_rss (pTHX_ struct coro *coro)
676{
677 size_t rss = sizeof (*coro);
678
679 if (coro->mainstack)
680 {
681 perl_slots tmp_slot;
682 perl_slots *slot;
683
684 if (coro->flags & CF_RUNNING)
685 {
686 slot = &tmp_slot;
687
688 #define VAR(name,type) slot->name = PL_ ## name;
689 # include "state.h"
690 #undef VAR
691 }
692 else
693 slot = coro->slot;
694
695 if (slot)
696 {
697 rss += sizeof (slot->curstackinfo);
698 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
699 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
700 rss += slot->tmps_max * sizeof (SV *);
701 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
702 rss += slot->scopestack_max * sizeof (I32);
703 rss += slot->savestack_max * sizeof (ANY);
704
705#if !PERL_VERSION_ATLEAST (5,10,0)
706 rss += slot->retstack_max * sizeof (OP *);
707#endif
708 }
709 }
710
711 return rss;
712}
713
714/** coroutine stack handling ************************************************/
715
716static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
718static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
719
720/* apparently < 5.8.8 */
721#ifndef MgPV_nolen_const
722#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
723 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
724 (const char*)(mg)->mg_ptr)
725#endif
726
727/*
728 * This overrides the default magic get method of %SIG elements.
729 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
730 * and instead of tryign to save and restore the hash elements, we just provide
731 * readback here.
732 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
733 * not expecting this to actually change the hook. This is a potential problem
734 * when a schedule happens then, but we ignore this.
735 */
736static int
737coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
738{
739 const char *s = MgPV_nolen_const (mg);
740
741 if (*s == '_')
742 {
743 SV **svp = 0;
744
745 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
746 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
747
748 if (svp)
749 {
750 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
751 return 0;
752 }
753 }
754
755 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
756}
757
758static int
759coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = 0;
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
780}
781
782static int
783coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
784{
785 const char *s = MgPV_nolen_const (mg);
786
787 if (*s == '_')
788 {
789 SV **svp = 0;
790
791 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
792 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
793
794 if (svp)
795 {
796 SV *old = *svp;
797 *svp = newSVsv (sv);
798 SvREFCNT_dec (old);
799 return 0;
800 }
801 }
802
803 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
804}
805
550static void 806static void
551setup_coro (struct coro *coro) 807coro_setup (pTHX_ struct coro *coro)
552{ 808{
553 /* 809 /*
554 * emulate part of the perl startup here. 810 * emulate part of the perl startup here.
555 */ 811 */
556
557 coro_init_stacks (); 812 coro_init_stacks (aTHX);
558 813
814 PL_runops = RUNOPS_DEFAULT;
815 PL_curcop = &PL_compiling;
816 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 817 PL_comppad = 0;
560 PL_in_eval = 0;
561 PL_curpm = 0; 818 PL_curpm = 0;
819 PL_curpad = 0;
820 PL_localizing = 0;
821 PL_dirty = 0;
822 PL_restartop = 0;
823#if PERL_VERSION_ATLEAST (5,10,0)
824 PL_parser = 0;
825#endif
826
827 /* recreate the die/warn hooks */
828 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
829 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
830
831 GvSV (PL_defgv) = newSV (0);
832 GvAV (PL_defgv) = coro->args; coro->args = 0;
833 GvSV (PL_errgv) = newSV (0);
834 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
835 PL_rs = newSVsv (GvSV (irsgv));
836 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
562 837
563 { 838 {
564 dSP; 839 dSP;
565 LOGOP myop; 840 LOGOP myop;
566 841
567 /* I have no idea why this is needed, but it is */
568 PUSHMARK (SP);
569
570 SvREFCNT_dec (GvAV (PL_defgv));
571 GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573 Zero (&myop, 1, LOGOP); 842 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop; 843 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID; 844 myop.op_flags = OPf_WANT_VOID;
576 845
846 PUSHMARK (SP);
847 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
848 PUTBACK;
577 PL_op = (OP *)&myop; 849 PL_op = (OP *)&myop;
578
579 PUSHMARK (SP);
580 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581 PUTBACK;
582 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 850 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN; 851 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 852 }
853
854 /* this newly created coroutine might be run on an existing cctx which most
855 * likely was suspended in set_stacklevel, called from entersub.
856 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
857 * so we ENTER here for symmetry
858 */
859 ENTER;
587} 860}
588 861
589static void 862static void
863coro_destruct (pTHX_ struct coro *coro)
864{
865 if (!IN_DESTRUCT)
866 {
867 /* restore all saved variables and stuff */
868 LEAVE_SCOPE (0);
869 assert (PL_tmps_floor == -1);
870
871 /* free all temporaries */
872 FREETMPS;
873 assert (PL_tmps_ix == -1);
874
875 /* unwind all extra stacks */
876 POPSTACK_TO (PL_mainstack);
877
878 /* unwind main stack */
879 dounwind (-1);
880 }
881
882 SvREFCNT_dec (GvSV (PL_defgv));
883 SvREFCNT_dec (GvAV (PL_defgv));
884 SvREFCNT_dec (GvSV (PL_errgv));
885 SvREFCNT_dec (PL_defoutgv);
886 SvREFCNT_dec (PL_rs);
887 SvREFCNT_dec (GvSV (irsgv));
888
889 SvREFCNT_dec (PL_diehook);
890 SvREFCNT_dec (PL_warnhook);
891
892 SvREFCNT_dec (coro->saved_deffh);
893 SvREFCNT_dec (coro->throw);
894
895 coro_destruct_stacks (aTHX);
896}
897
898static void
590free_coro_mortal () 899free_coro_mortal (pTHX)
591{ 900{
592 if (coro_mortal) 901 if (expect_true (coro_mortal))
593 { 902 {
594 SvREFCNT_dec (coro_mortal); 903 SvREFCNT_dec (coro_mortal);
595 coro_mortal = 0; 904 coro_mortal = 0;
596 } 905 }
597} 906}
598 907
908static int
909runops_trace (pTHX)
910{
911 COP *oldcop = 0;
912 int oldcxix = -2;
913 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
914 coro_cctx *cctx = coro->cctx;
915
916 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
917 {
918 PERL_ASYNC_CHECK ();
919
920 if (cctx->flags & CC_TRACE_ALL)
921 {
922 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
923 {
924 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
925 SV **bot, **top;
926 AV *av = newAV (); /* return values */
927 SV **cb;
928 dSP;
929
930 GV *gv = CvGV (cx->blk_sub.cv);
931 SV *fullname = sv_2mortal (newSV (0));
932 if (isGV (gv))
933 gv_efullname3 (fullname, gv, 0);
934
935 bot = PL_stack_base + cx->blk_oldsp + 1;
936 top = cx->blk_gimme == G_ARRAY ? SP + 1
937 : cx->blk_gimme == G_SCALAR ? bot + 1
938 : bot;
939
940 av_extend (av, top - bot);
941 while (bot < top)
942 av_push (av, SvREFCNT_inc_NN (*bot++));
943
944 PL_runops = RUNOPS_DEFAULT;
945 ENTER;
946 SAVETMPS;
947 EXTEND (SP, 3);
948 PUSHMARK (SP);
949 PUSHs (&PL_sv_no);
950 PUSHs (fullname);
951 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
952 PUTBACK;
953 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
954 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
955 SPAGAIN;
956 FREETMPS;
957 LEAVE;
958 PL_runops = runops_trace;
959 }
960
961 if (oldcop != PL_curcop)
962 {
963 oldcop = PL_curcop;
964
965 if (PL_curcop != &PL_compiling)
966 {
967 SV **cb;
968
969 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
970 {
971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
972
973 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
974 {
975 runops_proc_t old_runops = PL_runops;
976 dSP;
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979
980 if (isGV (gv))
981 gv_efullname3 (fullname, gv, 0);
982
983 PL_runops = RUNOPS_DEFAULT;
984 ENTER;
985 SAVETMPS;
986 EXTEND (SP, 3);
987 PUSHMARK (SP);
988 PUSHs (&PL_sv_yes);
989 PUSHs (fullname);
990 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
991 PUTBACK;
992 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
993 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
994 SPAGAIN;
995 FREETMPS;
996 LEAVE;
997 PL_runops = runops_trace;
998 }
999
1000 oldcxix = cxstack_ix;
1001 }
1002
1003 if (cctx->flags & CC_TRACE_LINE)
1004 {
1005 dSP;
1006
1007 PL_runops = RUNOPS_DEFAULT;
1008 ENTER;
1009 SAVETMPS;
1010 EXTEND (SP, 3);
1011 PL_runops = RUNOPS_DEFAULT;
1012 PUSHMARK (SP);
1013 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1014 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1015 PUTBACK;
1016 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1017 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1018 SPAGAIN;
1019 FREETMPS;
1020 LEAVE;
1021 PL_runops = runops_trace;
1022 }
1023 }
1024 }
1025 }
1026 }
1027
1028 TAINT_NOT;
1029 return 0;
1030}
1031
1032/* inject a fake call to Coro::State::_cctx_init into the execution */
1033/* _cctx_init should be careful, as it could be called at almost any time */
1034/* during execution of a perl program */
1035/* also initialises PL_top_env */
599static void NOINLINE 1036static void NOINLINE
600prepare_cctx (coro_stack *cctx) 1037cctx_prepare (pTHX_ coro_cctx *cctx)
601{ 1038{
602 dSP; 1039 dSP;
603 LOGOP myop; 1040 LOGOP myop;
604 1041
1042 PL_top_env = &PL_start_env;
1043
1044 if (cctx->flags & CC_TRACE)
1045 PL_runops = runops_trace;
1046
605 Zero (&myop, 1, LOGOP); 1047 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op; 1048 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID; 1049 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610 1050
611 PUSHMARK (SP); 1051 PUSHMARK (SP);
1052 EXTEND (SP, 2);
1053 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1054 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613 PUTBACK; 1055 PUTBACK;
1056 PL_op = (OP *)&myop;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1057 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 1058 SPAGAIN;
616} 1059}
617 1060
1061/* the tail of transfer: execute stuff we can onyl do afetr a transfer */
618static void 1062static void
619coro_run (void *arg) 1063transfer_tail (void)
620{ 1064{
621 /* coro_run is the alternative epilogue of transfer() */
622 UNLOCK; 1065 UNLOCK;
623 1066
624 /* 1067 if (expect_false (next_has_throw))
1068 {
1069 struct coro *coro = SvSTATE (coro_current);
1070
1071 if (coro->throw)
1072 {
1073 SV *exception = coro->throw;
1074 coro->throw = 0;
1075 sv_setsv (ERRSV, exception);
1076 croak (0);
1077 }
1078 }
1079}
1080
1081/*
625 * this is a _very_ stripped down perl interpreter ;) 1082 * this is a _very_ stripped down perl interpreter ;)
626 */ 1083 */
627 PL_top_env = &PL_start_env; 1084static void
1085cctx_run (void *arg)
1086{
1087#ifdef USE_ITHREADS
1088# if CORO_PTHREAD
1089 PERL_SET_CONTEXT (coro_thx);
1090# endif
1091#endif
1092 {
1093 dTHX;
1094
1095 /* we now skip the entersub that lead to transfer () */
1096 PL_op = PL_op->op_next;
1097
628 /* inject call to cctx_init */ 1098 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx ((coro_stack *)arg); 1099 cctx_prepare (aTHX_ (coro_cctx *)arg);
630 1100
1101 /* cctx_run is the alternative tail of transfer () */
1102 transfer_tail ();
1103
631 /* somebody will hit me for both perl_run and PL_restartop */ 1104 /* somebody or something will hit me for both perl_run and PL_restartop */
1105 PL_restartop = PL_op;
632 perl_run (PL_curinterp); 1106 perl_run (PL_curinterp);
633 1107
634 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1108 /*
635 abort (); 1109 * If perl-run returns we assume exit() was being called or the coro
1110 * fell off the end, which seems to be the only valid (non-bug)
1111 * reason for perl_run to return. We try to exit by jumping to the
1112 * bootstrap-time "top" top_env, as we cannot restore the "main"
1113 * coroutine as Coro has no such concept
1114 */
1115 PL_top_env = main_top_env;
1116 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1117 }
636} 1118}
637 1119
638static coro_stack * 1120static coro_cctx *
639stack_new () 1121cctx_new ()
640{ 1122{
641 coro_stack *stack; 1123 coro_cctx *cctx;
642 1124
1125 ++cctx_count;
643 New (0, stack, 1, coro_stack); 1126 New (0, cctx, 1, coro_cctx);
1127
1128 cctx->gen = cctx_gen;
1129 cctx->flags = 0;
1130 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel */
1131
1132 return cctx;
1133}
1134
1135/* create a new cctx only suitable as source */
1136static coro_cctx *
1137cctx_new_empty ()
1138{
1139 coro_cctx *cctx = cctx_new ();
1140
1141 cctx->sptr = 0;
1142 coro_create (&cctx->cctx, 0, 0, 0, 0);
1143
1144 return cctx;
1145}
1146
1147/* create a new cctx suitable as destination/running a perl interpreter */
1148static coro_cctx *
1149cctx_new_run ()
1150{
1151 coro_cctx *cctx = cctx_new ();
1152 void *stack_start;
1153 size_t stack_size;
644 1154
645#if HAVE_MMAP 1155#if HAVE_MMAP
646
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1156 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648 /* mmap suppsedly does allocate-on-write for us */ 1157 /* mmap supposedly does allocate-on-write for us */
649 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1158 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1159
651 if (stack->sptr == (void *)-1) 1160 if (cctx->sptr != (void *)-1)
652 {
653 perror ("FATAL: unable to mmap stack for coroutine");
654 _exit (EXIT_FAILURE);
655 } 1161 {
656
657# if STACKGUARD 1162# if CORO_STACKGUARD
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1163 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659# endif 1164# endif
660 1165 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
661#else 1166 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
662 1167 cctx->flags |= CC_MAPPED;
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 { 1168 }
1169 else
1170#endif
1171 {
1172 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1173 New (0, cctx->sptr, cctx_stacksize, long);
1174
1175 if (!cctx->sptr)
1176 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1177 perror ("FATAL: unable to allocate stack for coroutine");
669 _exit (EXIT_FAILURE); 1178 _exit (EXIT_FAILURE);
670 } 1179 }
671 1180
672#endif 1181 stack_start = cctx->sptr;
1182 stack_size = cctx->ssize;
1183 }
673 1184
674#if USE_VALGRIND 1185 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675 stack->valgrind_id = VALGRIND_STACK_REGISTER ( 1186 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
676 STACKGUARD * PAGESIZE + (char *)stack->sptr,
677 stack->ssize + (char *)stack->sptr
678 );
679#endif
680 1187
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1188 return cctx;
684} 1189}
685 1190
686static void 1191static void
687stack_free (coro_stack *stack) 1192cctx_destroy (coro_cctx *cctx)
688{ 1193{
689 if (!stack) 1194 if (!cctx)
690 return; 1195 return;
691 1196
1197 --cctx_count;
1198 coro_destroy (&cctx->cctx);
1199
1200 /* coro_transfer creates new, empty cctx's */
1201 if (cctx->sptr)
1202 {
692#if USE_VALGRIND 1203#if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id); 1204 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1205#endif
695 1206
696#if HAVE_MMAP 1207#if HAVE_MMAP
697 munmap (stack->sptr, stack->ssize); 1208 if (cctx->flags & CC_MAPPED)
698#else 1209 munmap (cctx->sptr, cctx->ssize);
1210 else
1211#endif
699 Safefree (stack->sptr); 1212 Safefree (cctx->sptr);
700#endif 1213 }
701 1214
702 Safefree (stack); 1215 Safefree (cctx);
703} 1216}
704 1217
705static coro_stack *stack_first; 1218/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1219#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
707 1220
708static coro_stack * 1221static coro_cctx *
709stack_get () 1222cctx_get (pTHX)
710{ 1223{
711 coro_stack *stack; 1224 while (expect_true (cctx_first))
712
713 if (stack_first)
714 { 1225 {
1226 coro_cctx *cctx = cctx_first;
1227 cctx_first = cctx->next;
715 --cctx_idle; 1228 --cctx_idle;
716 stack = stack_first; 1229
717 stack_first = stack->next; 1230 if (expect_true (!CCTX_EXPIRED (cctx)))
718 } 1231 return cctx;
719 else 1232
720 { 1233 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1234 }
725 1235
726 return stack; 1236 return cctx_new_run ();
727} 1237}
728 1238
729static void 1239static void
730stack_put (coro_stack *stack) 1240cctx_put (coro_cctx *cctx)
731{ 1241{
1242 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1243
1244 /* free another cctx if overlimit */
1245 if (expect_false (cctx_idle >= cctx_max_idle))
1246 {
1247 coro_cctx *first = cctx_first;
1248 cctx_first = first->next;
1249 --cctx_idle;
1250
1251 cctx_destroy (first);
1252 }
1253
732 ++cctx_idle; 1254 ++cctx_idle;
733 stack->next = stack_first; 1255 cctx->next = cctx_first;
734 stack_first = stack; 1256 cctx_first = cctx;
735} 1257}
736 1258
737/* never call directly, always through the coro_state_transfer global variable */ 1259/** coroutine switching *****************************************************/
1260
1261static void
1262transfer_check (pTHX_ struct coro *prev, struct coro *next)
1263{
1264 if (expect_true (prev != next))
1265 {
1266 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1267 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1268
1269 if (expect_false (next->flags & CF_RUNNING))
1270 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1271
1272 if (expect_false (next->flags & CF_DESTROYED))
1273 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1274
1275#if !PERL_VERSION_ATLEAST (5,10,0)
1276 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1277 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1278#endif
1279 }
1280}
1281
1282/* always use the TRANSFER macro */
738static void NOINLINE 1283static void NOINLINE
739transfer (struct coro *prev, struct coro *next, int flags) 1284transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1285{
741 dSTACKLEVEL; 1286 dSTACKLEVEL;
742 1287
743 /* sometimes transfer is only called to set idle_sp */ 1288 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1289 if (expect_false (!next))
1290 {
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1291 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 else if (prev != next) 1292 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1293 }
1294 else if (expect_true (prev != next))
1295 {
748 coro_stack *prev__stack; 1296 coro_cctx *prev__cctx;
1297
1298 if (expect_false (prev->flags & CF_NEW))
1299 {
1300 /* create a new empty/source context */
1301 prev->cctx = cctx_new_empty ();
1302 prev->flags &= ~CF_NEW;
1303 prev->flags |= CF_RUNNING;
1304 }
1305
1306 prev->flags &= ~CF_RUNNING;
1307 next->flags |= CF_RUNNING;
749 1308
750 LOCK; 1309 LOCK;
751 1310
752 if (next->mainstack) 1311 /* first get rid of the old state */
1312 save_perl (aTHX_ prev);
1313
1314 if (expect_false (next->flags & CF_NEW))
753 { 1315 {
754 /* coroutine already started */ 1316 /* need to start coroutine */
755 SAVE (prev, flags); 1317 next->flags &= ~CF_NEW;
756 LOAD (next); 1318 /* setup coroutine call */
1319 coro_setup (aTHX_ next);
757 } 1320 }
758 else 1321 else
1322 load_perl (aTHX_ next);
1323
1324 prev__cctx = prev->cctx;
1325
1326 if (prev__cctx->idle_sp == STACKLEVEL) asm volatile("");//D
1327
1328 /* possibly "free" the cctx */
1329 if (expect_true (
1330 prev__cctx->idle_sp == STACKLEVEL
1331 && !(prev__cctx->flags & CC_TRACE)
1332 && !force_cctx
1333 ))
759 { 1334 {
760 /* need to start coroutine */ 1335 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1336 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762 SAVE (prev, -1); 1337
763 /* setup coroutine call */ 1338 prev->cctx = 0;
764 setup_coro (next); 1339
765 /* need a stack */ 1340 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766 next->stack = 0; 1341 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1342 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1343 if (!next->cctx)
1344 next->cctx = cctx_get (aTHX);
1345
1346 cctx_put (prev__cctx);
767 } 1347 }
768 1348
769 if (!prev->stack) 1349 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1350
773 prev__stack = prev->stack; 1351 if (expect_true (!next->cctx))
1352 next->cctx = cctx_get (aTHX);
774 1353
775 /* possibly "free" the stack */ 1354 next_has_throw = !!next->throw;
776 if (prev__stack->idle_sp == STACKLEVEL) 1355
1356 if (expect_false (prev__cctx != next->cctx))
777 { 1357 {
778 stack_put (prev__stack); 1358 prev__cctx->top_env = PL_top_env;
779 prev->stack = 0; 1359 PL_top_env = next->cctx->top_env;
1360 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780 } 1361 }
781 1362
782 if (!next->stack)
783 next->stack = stack_get ();
784
785 if (prev__stack != next->stack)
786 {
787 prev__stack->top_env = PL_top_env;
788 PL_top_env = next->stack->top_env;
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
790 }
791
792 free_coro_mortal (); 1363 free_coro_mortal (aTHX);
793
794 UNLOCK; 1364 UNLOCK;
1365
1366 transfer_tail ();
795 } 1367 }
796} 1368}
797 1369
798struct transfer_args 1370struct transfer_args
799{ 1371{
800 struct coro *prev, *next; 1372 struct coro *prev, *next;
801 int flags;
802}; 1373};
803 1374
1375#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
804#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1376#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
805 1377
1378/** high level stuff ********************************************************/
1379
806static void 1380static int
807coro_state_destroy (struct coro *coro) 1381coro_state_destroy (pTHX_ struct coro *coro)
808{ 1382{
809 if (coro->refcnt--) 1383 if (coro->flags & CF_DESTROYED)
810 return; 1384 return 0;
1385
1386 coro->flags |= CF_DESTROYED;
1387
1388 if (coro->flags & CF_READY)
1389 {
1390 /* reduce nready, as destroying a ready coro effectively unreadies it */
1391 /* alternative: look through all ready queues and remove the coro */
1392 LOCK;
1393 --coro_nready;
1394 UNLOCK;
1395 }
1396 else
1397 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
811 1398
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1399 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1400 {
814 struct coro temp; 1401 struct coro temp;
815 1402
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1403 if (coro->flags & CF_RUNNING)
817 LOAD (coro); 1404 croak ("FATAL: tried to destroy currently running coroutine");
818 1405
819 coro_destroy_stacks (); 1406 save_perl (aTHX_ &temp);
1407 load_perl (aTHX_ coro);
820 1408
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1409 coro_destruct (aTHX_ coro);
822 1410
1411 load_perl (aTHX_ &temp);
1412
823 coro->mainstack = 0; 1413 coro->slot = 0;
824 } 1414 }
825 1415
826 stack_free (coro->stack); 1416 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1417 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1418
1419 if (coro->next) coro->next->prev = coro->prev;
1420 if (coro->prev) coro->prev->next = coro->next;
1421 if (coro == coro_first) coro_first = coro->next;
1422
1423 return 1;
829} 1424}
830 1425
831static int 1426static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1427coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1428{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1429 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1430 mg->mg_ptr = 0;
836 1431
1432 coro->hv = 0;
1433
1434 if (--coro->refcnt < 0)
1435 {
837 coro_state_destroy (coro); 1436 coro_state_destroy (aTHX_ coro);
1437 Safefree (coro);
1438 }
838 1439
839 return 0; 1440 return 0;
840} 1441}
841 1442
842static int 1443static int
… …
849 return 0; 1450 return 0;
850} 1451}
851 1452
852static MGVTBL coro_state_vtbl = { 1453static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1454 0, 0, 0, 0,
854 coro_state_clear, 1455 coro_state_free,
855 0, 1456 0,
856#ifdef MGf_DUP 1457#ifdef MGf_DUP
857 coro_state_dup, 1458 coro_state_dup,
858#else 1459#else
859# define MGf_DUP 0 1460# define MGf_DUP 0
860#endif 1461#endif
861}; 1462};
862 1463
863static struct coro *
864SvSTATE (SV *coro)
865{
866 HV *stash;
867 MAGIC *mg;
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 stash = SvSTASH (coro);
873 if (stash != coro_stash && stash != coro_state_stash)
874 {
875 /* very slow, but rare, check */
876 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877 croak ("Coro::State object required");
878 }
879
880 mg = SvMAGIC (coro);
881 assert (mg->mg_type == PERL_MAGIC_ext);
882 return (struct coro *)mg->mg_ptr;
883}
884
885static void 1464static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1465prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1466{
888 ta->prev = SvSTATE (prev); 1467 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1468 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1469 TRANSFER_CHECK (*ta);
891} 1470}
892 1471
893static void 1472static void
894api_transfer (SV *prev, SV *next, int flags) 1473api_transfer (SV *prev_sv, SV *next_sv)
895{ 1474{
896 dTHX; 1475 dTHX;
897 struct transfer_args ta; 1476 struct transfer_args ta;
898 1477
899 prepare_transfer (&ta, prev, next, flags); 1478 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900 TRANSFER (ta); 1479 TRANSFER (ta, 1);
901} 1480}
902 1481
903/** Coro ********************************************************************/ 1482/** Coro ********************************************************************/
904 1483
905#define PRIO_MAX 3
906#define PRIO_HIGH 1
907#define PRIO_NORMAL 0
908#define PRIO_LOW -1
909#define PRIO_IDLE -3
910#define PRIO_MIN -4
911
912/* for Coro.pm */
913static GV *coro_current, *coro_idle;
914static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915static int coro_nready;
916
917static void 1484static void
918coro_enq (SV *sv) 1485coro_enq (pTHX_ SV *coro_sv)
1486{
1487 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1488}
1489
1490static SV *
1491coro_deq (pTHX)
919{ 1492{
920 int prio; 1493 int prio;
921 1494
922 if (SvTYPE (sv) != SVt_PVHV)
923 croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925 prio = SvSTATE (sv)->prio;
926
927 av_push (coro_ready [prio - PRIO_MIN], sv);
928 coro_nready++;
929}
930
931static SV *
932coro_deq (int min_prio)
933{
934 int prio = PRIO_MAX - PRIO_MIN;
935
936 min_prio -= PRIO_MIN;
937 if (min_prio < 0)
938 min_prio = 0;
939
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1495 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941 if (AvFILLp (coro_ready [prio]) >= 0) 1496 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]); 1497 return av_shift (coro_ready [prio]);
945 }
946 1498
947 return 0; 1499 return 0;
948} 1500}
949 1501
1502static int
1503api_ready (SV *coro_sv)
1504{
1505 dTHX;
1506 struct coro *coro;
1507 SV *sv_hook;
1508 void (*xs_hook)(void);
1509
1510 if (SvROK (coro_sv))
1511 coro_sv = SvRV (coro_sv);
1512
1513 coro = SvSTATE (coro_sv);
1514
1515 if (coro->flags & CF_READY)
1516 return 0;
1517
1518 coro->flags |= CF_READY;
1519
1520 LOCK;
1521
1522 sv_hook = coro_nready ? 0 : coro_readyhook;
1523 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1524
1525 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1526 ++coro_nready;
1527
1528 UNLOCK;
1529
1530 if (sv_hook)
1531 {
1532 dSP;
1533
1534 ENTER;
1535 SAVETMPS;
1536
1537 PUSHMARK (SP);
1538 PUTBACK;
1539 call_sv (sv_hook, G_DISCARD);
1540 SPAGAIN;
1541
1542 FREETMPS;
1543 LEAVE;
1544 }
1545
1546 if (xs_hook)
1547 xs_hook ();
1548
1549 return 1;
1550}
1551
1552static int
1553api_is_ready (SV *coro_sv)
1554{
1555 dTHX;
1556 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1557}
1558
950static void 1559static void
951api_ready (SV *coro) 1560prepare_schedule (pTHX_ struct transfer_args *ta)
952{ 1561{
953 dTHX; 1562 SV *prev_sv, *next_sv;
954 1563
955 if (SvROK (coro)) 1564 for (;;)
956 coro = SvRV (coro); 1565 {
1566 LOCK;
1567 next_sv = coro_deq (aTHX);
1568
1569 /* nothing to schedule: call the idle handler */
1570 if (expect_false (!next_sv))
1571 {
1572 dSP;
1573 UNLOCK;
1574
1575 ENTER;
1576 SAVETMPS;
1577
1578 PUSHMARK (SP);
1579 PUTBACK;
1580 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1581 SPAGAIN;
1582
1583 FREETMPS;
1584 LEAVE;
1585 continue;
1586 }
1587
1588 ta->next = SvSTATE (next_sv);
1589
1590 /* cannot transfer to destroyed coros, skip and look for next */
1591 if (expect_false (ta->next->flags & CF_DESTROYED))
1592 {
1593 UNLOCK;
1594 SvREFCNT_dec (next_sv);
1595 /* coro_nready is already taken care of by destroy */
1596 continue;
1597 }
1598
1599 --coro_nready;
1600 UNLOCK;
1601 break;
1602 }
1603
1604 /* free this only after the transfer */
1605 prev_sv = SvRV (coro_current);
1606 ta->prev = SvSTATE (prev_sv);
1607 TRANSFER_CHECK (*ta);
1608 assert (ta->next->flags & CF_READY);
1609 ta->next->flags &= ~CF_READY;
1610 SvRV_set (coro_current, next_sv);
957 1611
958 LOCK; 1612 LOCK;
959 coro_enq (SvREFCNT_inc (coro)); 1613 free_coro_mortal (aTHX);
1614 coro_mortal = prev_sv;
960 UNLOCK; 1615 UNLOCK;
961} 1616}
962 1617
963static void 1618static void
964prepare_schedule (struct transfer_args *ta)
965{
966 SV *current, *prev, *next;
967
968 current = GvSV (coro_current);
969
970 for (;;)
971 {
972 LOCK;
973 next = coro_deq (PRIO_MIN);
974 UNLOCK;
975
976 if (next)
977 break;
978
979 {
980 dSP;
981
982 ENTER;
983 SAVETMPS;
984
985 PUSHMARK (SP);
986 PUTBACK;
987 call_sv (GvSV (coro_idle), G_DISCARD);
988
989 FREETMPS;
990 LEAVE;
991 }
992 }
993
994 prev = SvRV (current);
995 SvRV (current) = next;
996
997 /* free this only after the transfer */
998 LOCK;
999 free_coro_mortal ();
1000 UNLOCK;
1001 coro_mortal = prev;
1002
1003 ta->prev = SvSTATE (prev);
1004 ta->next = SvSTATE (next);
1005 ta->flags = TRANSFER_SAVE_ALL;
1006}
1007
1008static void
1009prepare_cede (struct transfer_args *ta) 1619prepare_cede (pTHX_ struct transfer_args *ta)
1010{ 1620{
1011 LOCK; 1621 api_ready (coro_current);
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014
1015 prepare_schedule (ta); 1622 prepare_schedule (aTHX_ ta);
1623}
1624
1625static int
1626prepare_cede_notself (pTHX_ struct transfer_args *ta)
1627{
1628 if (coro_nready)
1629 {
1630 SV *prev = SvRV (coro_current);
1631 prepare_schedule (aTHX_ ta);
1632 api_ready (prev);
1633 return 1;
1634 }
1635 else
1636 return 0;
1016} 1637}
1017 1638
1018static void 1639static void
1019api_schedule (void) 1640api_schedule (void)
1020{ 1641{
1021 dTHX; 1642 dTHX;
1022 struct transfer_args ta; 1643 struct transfer_args ta;
1023 1644
1024 prepare_schedule (&ta); 1645 prepare_schedule (aTHX_ &ta);
1025 TRANSFER (ta); 1646 TRANSFER (ta, 1);
1026} 1647}
1027 1648
1028static void 1649static int
1029api_cede (void) 1650api_cede (void)
1030{ 1651{
1031 dTHX; 1652 dTHX;
1032 struct transfer_args ta; 1653 struct transfer_args ta;
1033 1654
1034 prepare_cede (&ta); 1655 prepare_cede (aTHX_ &ta);
1656
1657 if (expect_true (ta.prev != ta.next))
1658 {
1035 TRANSFER (ta); 1659 TRANSFER (ta, 1);
1660 return 1;
1661 }
1662 else
1663 return 0;
1036} 1664}
1037 1665
1666static int
1667api_cede_notself (void)
1668{
1669 dTHX;
1670 struct transfer_args ta;
1671
1672 if (prepare_cede_notself (aTHX_ &ta))
1673 {
1674 TRANSFER (ta, 1);
1675 return 1;
1676 }
1677 else
1678 return 0;
1679}
1680
1681static void
1682api_trace (SV *coro_sv, int flags)
1683{
1684 dTHX;
1685 struct coro *coro = SvSTATE (coro_sv);
1686
1687 if (flags & CC_TRACE)
1688 {
1689 if (!coro->cctx)
1690 coro->cctx = cctx_new_run ();
1691 else if (!(coro->cctx->flags & CC_TRACE))
1692 croak ("cannot enable tracing on coroutine with custom stack");
1693
1694 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1695 }
1696 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1697 {
1698 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1699
1700 if (coro->flags & CF_RUNNING)
1701 PL_runops = RUNOPS_DEFAULT;
1702 else
1703 coro->slot->runops = RUNOPS_DEFAULT;
1704 }
1705}
1706
1707#if 0
1708static int
1709coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1710{
1711 AV *padlist;
1712 AV *av = (AV *)mg->mg_obj;
1713
1714 abort ();
1715
1716 return 0;
1717}
1718
1719static MGVTBL coro_gensub_vtbl = {
1720 0, 0, 0, 0,
1721 coro_gensub_free
1722};
1723#endif
1724
1725/*****************************************************************************/
1726/* PerlIO::cede */
1727
1728typedef struct
1729{
1730 PerlIOBuf base;
1731 NV next, every;
1732} PerlIOCede;
1733
1734static IV
1735PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1736{
1737 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1738
1739 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1740 self->next = nvtime () + self->every;
1741
1742 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1743}
1744
1745static SV *
1746PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1747{
1748 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1749
1750 return newSVnv (self->every);
1751}
1752
1753static IV
1754PerlIOCede_flush (pTHX_ PerlIO *f)
1755{
1756 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757 double now = nvtime ();
1758
1759 if (now >= self->next)
1760 {
1761 api_cede ();
1762 self->next = now + self->every;
1763 }
1764
1765 return PerlIOBuf_flush (aTHX_ f);
1766}
1767
1768static PerlIO_funcs PerlIO_cede =
1769{
1770 sizeof(PerlIO_funcs),
1771 "cede",
1772 sizeof(PerlIOCede),
1773 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1774 PerlIOCede_pushed,
1775 PerlIOBuf_popped,
1776 PerlIOBuf_open,
1777 PerlIOBase_binmode,
1778 PerlIOCede_getarg,
1779 PerlIOBase_fileno,
1780 PerlIOBuf_dup,
1781 PerlIOBuf_read,
1782 PerlIOBuf_unread,
1783 PerlIOBuf_write,
1784 PerlIOBuf_seek,
1785 PerlIOBuf_tell,
1786 PerlIOBuf_close,
1787 PerlIOCede_flush,
1788 PerlIOBuf_fill,
1789 PerlIOBase_eof,
1790 PerlIOBase_error,
1791 PerlIOBase_clearerr,
1792 PerlIOBase_setlinebuf,
1793 PerlIOBuf_get_base,
1794 PerlIOBuf_bufsiz,
1795 PerlIOBuf_get_ptr,
1796 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt,
1798};
1799
1800
1038MODULE = Coro::State PACKAGE = Coro::State 1801MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 1802
1040PROTOTYPES: DISABLE 1803PROTOTYPES: DISABLE
1041 1804
1042BOOT: 1805BOOT:
1043{ 1806{
1044#ifdef USE_ITHREADS 1807#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 1808 MUTEX_INIT (&coro_lock);
1809# if CORO_PTHREAD
1810 coro_thx = PERL_GET_CONTEXT;
1811# endif
1046#endif 1812#endif
1047 BOOT_PAGESIZE; 1813 BOOT_PAGESIZE;
1048 1814
1815 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1816 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1817
1818 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1819 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1820 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1821
1822 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1823 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1824 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1825
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1826 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 1827
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1828 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1829 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1830 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1831 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 1832
1055 main_mainstack = PL_mainstack; 1833 main_mainstack = PL_mainstack;
1834 main_top_env = PL_top_env;
1056 1835
1836 while (main_top_env->je_prev)
1837 main_top_env = main_top_env->je_prev;
1838
1057 coroapi.ver = CORO_API_VERSION; 1839 coroapi.ver = CORO_API_VERSION;
1840 coroapi.rev = CORO_API_REVISION;
1058 coroapi.transfer = api_transfer; 1841 coroapi.transfer = api_transfer;
1842
1843 {
1844 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1845
1846 if (!svp) croak ("Time::HiRes is required");
1847 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1848
1849 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1850 }
1059 1851
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1852 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061} 1853}
1062 1854
1063SV * 1855SV *
1064new (char *klass, ...) 1856new (char *klass, ...)
1065 CODE: 1857 CODE:
1066{ 1858{
1067 struct coro *coro; 1859 struct coro *coro;
1860 MAGIC *mg;
1068 HV *hv; 1861 HV *hv;
1069 int i; 1862 int i;
1070 1863
1071 Newz (0, coro, 1, struct coro); 1864 Newz (0, coro, 1, struct coro);
1072 coro->args = newAV (); 1865 coro->args = newAV ();
1866 coro->flags = CF_NEW;
1073 1867
1868 if (coro_first) coro_first->prev = coro;
1869 coro->next = coro_first;
1870 coro_first = coro;
1871
1074 hv = newHV (); 1872 coro->hv = hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1873 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1874 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1875 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077 1876
1877 av_extend (coro->args, items - 1);
1078 for (i = 1; i < items; i++) 1878 for (i = 1; i < items; i++)
1079 av_push (coro->args, newSVsv (ST (i))); 1879 av_push (coro->args, newSVsv (ST (i)));
1080
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1082 /*coro->stack = 0;*/
1083} 1880}
1084 OUTPUT: 1881 OUTPUT:
1085 RETVAL 1882 RETVAL
1086 1883
1884# these not obviously related functions are all rolled into the same xs
1885# function to increase chances that they all will call transfer with the same
1886# stack offset
1087void 1887void
1088_set_stacklevel (...) 1888_set_stacklevel (...)
1089 ALIAS: 1889 ALIAS:
1090 Coro::State::transfer = 1 1890 Coro::State::transfer = 1
1091 Coro::schedule = 2 1891 Coro::schedule = 2
1092 Coro::cede = 3 1892 Coro::cede = 3
1093 Coro::Cont::yield = 4 1893 Coro::cede_notself = 4
1094 CODE: 1894 CODE:
1095{ 1895{
1096 struct transfer_args ta; 1896 struct transfer_args ta;
1097 1897
1898 PUTBACK;
1098 switch (ix) 1899 switch (ix)
1099 { 1900 {
1100 case 0: 1901 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1902 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102 ta.next = 0; 1903 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break; 1904 break;
1105 1905
1106 case 1: 1906 case 1:
1107 if (items != 3) 1907 if (items != 2)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1908 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1109 1909
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1910 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111 break; 1911 break;
1112 1912
1113 case 2: 1913 case 2:
1114 prepare_schedule (&ta); 1914 prepare_schedule (aTHX_ &ta);
1115 break; 1915 break;
1116 1916
1117 case 3: 1917 case 3:
1118 prepare_cede (&ta); 1918 prepare_cede (aTHX_ &ta);
1119 break; 1919 break;
1120 1920
1121 case 4: 1921 case 4:
1122 { 1922 if (!prepare_cede_notself (aTHX_ &ta))
1123 SV *yieldstack; 1923 XSRETURN_EMPTY;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126 1924
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break; 1925 break;
1146
1147 } 1926 }
1927 SPAGAIN;
1148 1928
1929 BARRIER;
1930 PUTBACK;
1149 TRANSFER (ta); 1931 TRANSFER (ta, 0);
1932 SPAGAIN; /* might be the sp of a different coroutine now */
1933 /* be extra careful not to ever do anything after TRANSFER */
1150} 1934}
1935
1936bool
1937_destroy (SV *coro_sv)
1938 CODE:
1939 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1940 OUTPUT:
1941 RETVAL
1151 1942
1152void 1943void
1153_clone_state_from (SV *dst, SV *src)
1154 CODE:
1155{
1156 struct coro *coro_src = SvSTATE (src);
1157
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163
1164void
1165_exit (code) 1944_exit (int code)
1166 int code
1167 PROTOTYPE: $ 1945 PROTOTYPE: $
1168 CODE: 1946 CODE:
1169 _exit (code); 1947 _exit (code);
1170 1948
1949int
1950cctx_stacksize (int new_stacksize = 0)
1951 CODE:
1952 RETVAL = cctx_stacksize;
1953 if (new_stacksize)
1954 {
1955 cctx_stacksize = new_stacksize;
1956 ++cctx_gen;
1957 }
1958 OUTPUT:
1959 RETVAL
1960
1961int
1962cctx_max_idle (int max_idle = 0)
1963 CODE:
1964 RETVAL = cctx_max_idle;
1965 if (max_idle > 1)
1966 cctx_max_idle = max_idle;
1967 OUTPUT:
1968 RETVAL
1969
1970int
1971cctx_count ()
1972 CODE:
1973 RETVAL = cctx_count;
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978cctx_idle ()
1979 CODE:
1980 RETVAL = cctx_idle;
1981 OUTPUT:
1982 RETVAL
1983
1984void
1985list ()
1986 PPCODE:
1987{
1988 struct coro *coro;
1989 for (coro = coro_first; coro; coro = coro->next)
1990 if (coro->hv)
1991 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1992}
1993
1994void
1995call (Coro::State coro, SV *coderef)
1996 ALIAS:
1997 eval = 1
1998 CODE:
1999{
2000 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2001 {
2002 struct coro temp;
2003
2004 if (!(coro->flags & CF_RUNNING))
2005 {
2006 PUTBACK;
2007 save_perl (aTHX_ &temp);
2008 load_perl (aTHX_ coro);
2009 }
2010
2011 {
2012 dSP;
2013 ENTER;
2014 SAVETMPS;
2015 PUTBACK;
2016 PUSHSTACK;
2017 PUSHMARK (SP);
2018
2019 if (ix)
2020 eval_sv (coderef, 0);
2021 else
2022 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2023
2024 POPSTACK;
2025 SPAGAIN;
2026 FREETMPS;
2027 LEAVE;
2028 PUTBACK;
2029 }
2030
2031 if (!(coro->flags & CF_RUNNING))
2032 {
2033 save_perl (aTHX_ coro);
2034 load_perl (aTHX_ &temp);
2035 SPAGAIN;
2036 }
2037 }
2038}
2039
2040SV *
2041is_ready (Coro::State coro)
2042 PROTOTYPE: $
2043 ALIAS:
2044 is_ready = CF_READY
2045 is_running = CF_RUNNING
2046 is_new = CF_NEW
2047 is_destroyed = CF_DESTROYED
2048 CODE:
2049 RETVAL = boolSV (coro->flags & ix);
2050 OUTPUT:
2051 RETVAL
2052
2053void
2054api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2055
2056SV *
2057has_cctx (Coro::State coro)
2058 PROTOTYPE: $
2059 CODE:
2060 RETVAL = boolSV (!!coro->cctx);
2061 OUTPUT:
2062 RETVAL
2063
2064int
2065is_traced (Coro::State coro)
2066 PROTOTYPE: $
2067 CODE:
2068 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2069 OUTPUT:
2070 RETVAL
2071
2072UV
2073rss (Coro::State coro)
2074 PROTOTYPE: $
2075 ALIAS:
2076 usecount = 1
2077 CODE:
2078 switch (ix)
2079 {
2080 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2081 case 1: RETVAL = coro->usecount; break;
2082 }
2083 OUTPUT:
2084 RETVAL
2085
2086void
2087force_cctx ()
2088 CODE:
2089 struct coro *coro = SvSTATE (coro_current);
2090 coro->cctx->idle_sp = 0;
2091
2092void
2093swap_defsv (Coro::State self)
2094 PROTOTYPE: $
2095 ALIAS:
2096 swap_defav = 1
2097 CODE:
2098 if (!self->slot)
2099 croak ("cannot swap state with coroutine that has no saved state");
2100 else
2101 {
2102 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2103 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2104
2105 SV *tmp = *src; *src = *dst; *dst = tmp;
2106 }
2107
1171MODULE = Coro::State PACKAGE = Coro 2108MODULE = Coro::State PACKAGE = Coro
1172 2109
1173BOOT: 2110BOOT:
1174{ 2111{
1175 int i; 2112 int i;
1176 2113
2114 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2115 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2116 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2117
2118 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2119 SvREADONLY_on (coro_current);
2120
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2121 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2122
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2123 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2124 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2125 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2126 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2127 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2128 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2129
1186 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2130 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2131 coro_ready[i] = newAV ();
1191 2132
1192 { 2133 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2134 SV *sv = perl_get_sv ("Coro::API", TRUE);
2135 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 2136
1195 coroapi.schedule = api_schedule; 2137 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2138 coroapi.cede = api_cede;
2139 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2140 coroapi.ready = api_ready;
2141 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 2142 coroapi.nready = &coro_nready;
1199 coroapi.current = coro_current; 2143 coroapi.current = coro_current;
1200 2144
1201 GCoroAPI = &coroapi; 2145 GCoroAPI = &coroapi;
1202 sv_setiv (sv, (IV)&coroapi); 2146 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 2147 SvREADONLY_on (sv);
1204 } 2148 }
1205} 2149}
2150
2151void
2152_set_current (SV *current)
2153 PROTOTYPE: $
2154 CODE:
2155 SvREFCNT_dec (SvRV (coro_current));
2156 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2157
2158void
2159_set_readyhook (SV *hook)
2160 PROTOTYPE: $
2161 CODE:
2162 LOCK;
2163 SvREFCNT_dec (coro_readyhook);
2164 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2165 UNLOCK;
1206 2166
1207int 2167int
1208prio (Coro::State coro, int newprio = 0) 2168prio (Coro::State coro, int newprio = 0)
1209 ALIAS: 2169 ALIAS:
1210 nice = 1 2170 nice = 1
… …
1213 RETVAL = coro->prio; 2173 RETVAL = coro->prio;
1214 2174
1215 if (items > 1) 2175 if (items > 1)
1216 { 2176 {
1217 if (ix) 2177 if (ix)
1218 newprio += coro->prio; 2178 newprio = coro->prio - newprio;
1219 2179
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2180 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2181 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222 2182
1223 coro->prio = newprio; 2183 coro->prio = newprio;
1224 } 2184 }
1225} 2185}
2186 OUTPUT:
2187 RETVAL
1226 2188
1227void 2189SV *
1228ready (SV *self) 2190ready (SV *self)
1229 PROTOTYPE: $ 2191 PROTOTYPE: $
1230 CODE: 2192 CODE:
1231 api_ready (self); 2193 RETVAL = boolSV (api_ready (self));
2194 OUTPUT:
2195 RETVAL
1232 2196
1233int 2197int
1234nready (...) 2198nready (...)
1235 PROTOTYPE: 2199 PROTOTYPE:
1236 CODE: 2200 CODE:
1237 RETVAL = coro_nready; 2201 RETVAL = coro_nready;
1238 OUTPUT: 2202 OUTPUT:
1239 RETVAL 2203 RETVAL
1240 2204
1241MODULE = Coro::State PACKAGE = Coro::AIO 2205void
2206throw (Coro::State self, SV *throw = &PL_sv_undef)
2207 PROTOTYPE: $;$
2208 CODE:
2209 SvREFCNT_dec (self->throw);
2210 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2211
2212# for async_pool speedup
2213void
2214_pool_1 (SV *cb)
2215 CODE:
2216{
2217 struct coro *coro = SvSTATE (coro_current);
2218 HV *hv = (HV *)SvRV (coro_current);
2219 AV *defav = GvAV (PL_defgv);
2220 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2221 AV *invoke_av;
2222 int i, len;
2223
2224 if (!invoke)
2225 {
2226 SV *old = PL_diehook;
2227 PL_diehook = 0;
2228 SvREFCNT_dec (old);
2229 croak ("\3async_pool terminate\2\n");
2230 }
2231
2232 SvREFCNT_dec (coro->saved_deffh);
2233 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2234
2235 hv_store (hv, "desc", sizeof ("desc") - 1,
2236 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2237
2238 invoke_av = (AV *)SvRV (invoke);
2239 len = av_len (invoke_av);
2240
2241 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2242
2243 if (len > 0)
2244 {
2245 av_fill (defav, len - 1);
2246 for (i = 0; i < len; ++i)
2247 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2248 }
2249
2250 SvREFCNT_dec (invoke);
2251}
2252
2253void
2254_pool_2 (SV *cb)
2255 CODE:
2256{
2257 struct coro *coro = SvSTATE (coro_current);
2258
2259 sv_setsv (cb, &PL_sv_undef);
2260
2261 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2262 coro->saved_deffh = 0;
2263
2264 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2265 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2266 {
2267 SV *old = PL_diehook;
2268 PL_diehook = 0;
2269 SvREFCNT_dec (old);
2270 croak ("\3async_pool terminate\2\n");
2271 }
2272
2273 av_clear (GvAV (PL_defgv));
2274 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2275 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2276
2277 coro->prio = 0;
2278
2279 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2280 api_trace (coro_current, 0);
2281
2282 av_push (av_async_pool, newSVsv (coro_current));
2283}
2284
2285#if 0
2286
2287void
2288_generator_call (...)
2289 PROTOTYPE: @
2290 PPCODE:
2291 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2292 xxxx
2293 abort ();
1242 2294
1243SV * 2295SV *
1244_get_state () 2296gensub (SV *sub, ...)
1245 CODE: 2297 PROTOTYPE: &;@
2298 CODE:
1246{ 2299{
1247 struct { 2300 struct coro *coro;
1248 int errorno; 2301 MAGIC *mg;
1249 int laststype; 2302 CV *xcv;
1250 int laststatval; 2303 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1251 Stat_t statcache; 2304 int i;
1252 } data;
1253 2305
1254 data.errorno = errno; 2306 CvGV (ncv) = CvGV (cv);
1255 data.laststype = PL_laststype; 2307 CvFILE (ncv) = CvFILE (cv);
1256 data.laststatval = PL_laststatval;
1257 data.statcache = PL_statcache;
1258 2308
1259 RETVAL = newSVpvn ((char *)&data, sizeof data); 2309 Newz (0, coro, 1, struct coro);
2310 coro->args = newAV ();
2311 coro->flags = CF_NEW;
2312
2313 av_extend (coro->args, items - 1);
2314 for (i = 1; i < items; i++)
2315 av_push (coro->args, newSVsv (ST (i)));
2316
2317 CvISXSUB_on (ncv);
2318 CvXSUBANY (ncv).any_ptr = (void *)coro;
2319
2320 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2321
2322 CvXSUB (ncv) = CvXSUB (xcv);
2323 CvANON_on (ncv);
2324
2325 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2326 RETVAL = newRV_noinc ((SV *)ncv);
1260} 2327}
1261 OUTPUT: 2328 OUTPUT:
1262 RETVAL 2329 RETVAL
1263 2330
2331#endif
2332
2333
2334MODULE = Coro::State PACKAGE = Coro::AIO
2335
1264void 2336void
1265_set_state (char *data_) 2337_get_state (SV *self)
2338 PPCODE:
2339{
2340 AV *defav = GvAV (PL_defgv);
2341 AV *av = newAV ();
2342 int i;
2343 SV *data_sv = newSV (sizeof (struct io_state));
2344 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2345 SvCUR_set (data_sv, sizeof (struct io_state));
2346 SvPOK_only (data_sv);
2347
2348 data->errorno = errno;
2349 data->laststype = PL_laststype;
2350 data->laststatval = PL_laststatval;
2351 data->statcache = PL_statcache;
2352
2353 av_extend (av, AvFILLp (defav) + 1 + 1);
2354
2355 for (i = 0; i <= AvFILLp (defav); ++i)
2356 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2357
2358 av_push (av, data_sv);
2359
2360 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2361
2362 api_ready (self);
2363}
2364
2365void
2366_set_state (SV *state)
1266 PROTOTYPE: $ 2367 PROTOTYPE: $
2368 PPCODE:
2369{
2370 AV *av = (AV *)SvRV (state);
2371 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2372 int i;
2373
2374 errno = data->errorno;
2375 PL_laststype = data->laststype;
2376 PL_laststatval = data->laststatval;
2377 PL_statcache = data->statcache;
2378
2379 EXTEND (SP, AvFILLp (av));
2380 for (i = 0; i < AvFILLp (av); ++i)
2381 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2382}
2383
2384
2385MODULE = Coro::State PACKAGE = Coro::AnyEvent
2386
2387BOOT:
2388 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2389
2390SV *
2391_schedule (...)
2392 PROTOTYPE: @
1267 CODE: 2393 CODE:
1268{ 2394{
1269 struct { 2395 static int incede;
1270 int errorno;
1271 int laststype;
1272 int laststatval;
1273 Stat_t statcache;
1274 } *data = (void *)data_;
1275 2396
1276 errno = data->errorno; 2397 api_cede_notself ();
1277 PL_laststype = data->laststype; 2398
1278 PL_laststatval = data->laststatval; 2399 ++incede;
1279 PL_statcache = data->statcache; 2400 while (coro_nready >= incede && api_cede ())
2401 ;
2402
2403 sv_setsv (sv_activity, &PL_sv_undef);
2404 if (coro_nready >= incede)
2405 {
2406 PUSHMARK (SP);
2407 PUTBACK;
2408 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2409 SPAGAIN;
2410 }
2411
2412 --incede;
1280} 2413}
2414
2415
2416MODULE = Coro::State PACKAGE = PerlIO::cede
2417
2418BOOT:
2419 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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