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Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.254 by root, Fri Nov 7 20:27:47 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# 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;
8 58
9#define PERL_VERSION_ATLEAST(a,b,c) \ 59#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \ 60 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \ 61 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \ 62 && (PERL_VERSION > (b) \
… …
31# ifndef IS_PADCONST 81# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
33# endif 83# endif
34#endif 84#endif
35 85
36#include <stdio.h> 86/* 5.11 */
37#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
38 108
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD 110# undef CORO_STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h>
49# include <sys/mman.h>
50# ifndef MAP_ANONYMOUS
51# ifdef MAP_ANON
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif
56# endif 111#endif
57# include <limits.h> 112
58# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
59# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize;
62# else
63# define BOOT_PAGESIZE
64# endif 115#endif
65#endif
66 116
67/* The next macro should declare a variable stacklevel that contains and approximation 117/* prefer perl internal functions over our own? */
68 * to the current C stack pointer. Its property is that it changes with each call 118#ifndef CORO_PREFER_PERL_FUNCTIONS
69 * 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. */
70#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
71#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
72 126
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
74 128
75#if __GNUC__ >= 3 129#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
77#else 133#else
78# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
79#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
80 141
81#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
82 143
83#include "CoroAPI.h" 144#include "CoroAPI.h"
84 145
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86
87#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
88static perl_mutex coro_mutex; 147static perl_mutex coro_lock;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
91#else 150#else
92# define LOCK (void)0 151# define LOCK (void)0
93# define UNLOCK (void)0 152# define UNLOCK (void)0
94#endif 153#endif
95 154
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype;
161 int laststatval;
162 Stat_t statcache;
163};
164
165static double (*nvtime)(); /* so why doesn't it take void? */
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static AV *av_async_pool;
185
186/* Coro::AnyEvent */
187static SV *sv_activity;
188
189static struct coro_cctx *cctx_first;
190static int cctx_count, cctx_idle;
191
192enum {
193 CC_MAPPED = 0x01,
194 CC_NOREUSE = 0x02, /* throw this away after tracing */
195 CC_TRACE = 0x04,
196 CC_TRACE_SUB = 0x08, /* trace sub calls */
197 CC_TRACE_LINE = 0x10, /* trace each statement */
198 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
199};
100 200
101/* this is a structure representing a c-level coroutine */ 201/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 202typedef struct coro_cctx {
103 struct coro_stack *next; 203 struct coro_cctx *next;
104 204
105 /* the stack */ 205 /* the stack */
106 void *sptr; 206 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 207 size_t ssize;
108 208
109 /* cpu state */ 209 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 210 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
211 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 212 JMPENV *top_env;
112 coro_context cctx; 213 coro_context cctx;
113} coro_stack; 214
215 U32 gen;
216#if CORO_USE_VALGRIND
217 int valgrind_id;
218#endif
219 unsigned char flags;
220} coro_cctx;
221
222enum {
223 CF_RUNNING = 0x0001, /* coroutine is running */
224 CF_READY = 0x0002, /* coroutine is ready */
225 CF_NEW = 0x0004, /* has never been switched to */
226 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
227};
228
229/* the structure where most of the perl state is stored, overlaid on the cxstack */
230typedef struct {
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 241
115/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
116struct coro { 243struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the c coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 245 coro_cctx *cctx;
119 246
120 /* data associated with this coroutine (initial args) */ 247 /* process data */
121 AV *args;
122 int refcnt;
123
124 /* optionally saved, might be zero */
125 AV *defav;
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 248 AV *mainstack;
137 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
138 OP *op; 250
139 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
140 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
141 CV *compcv; 253 int flags; /* CF_ flags */
142 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 255
144 SV **tmps_stack; 256 /* statistics */
145 I32 tmps_floor; 257 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 258
163 /* coro process data */ 259 /* coro process data */
164 int prio; 260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
265
266 /* linked list */
267 struct coro *next, *prev;
165}; 268};
166 269
167typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
169 272
273/** Coro ********************************************************************/
274
275#define PRIO_MAX 3
276#define PRIO_HIGH 1
277#define PRIO_NORMAL 0
278#define PRIO_LOW -1
279#define PRIO_IDLE -3
280#define PRIO_MIN -4
281
282/* for Coro.pm */
283static SV *coro_current;
284static SV *coro_readyhook;
285static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
286static int coro_nready;
287static struct coro *coro_first;
288
289/** lowlevel stuff **********************************************************/
290
291static SV *
292coro_get_sv (pTHX_ const char *name, int create)
293{
294#if PERL_VERSION_ATLEAST (5,10,0)
295 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
296 get_sv (name, create);
297#endif
298 return get_sv (name, create);
299}
300
170static AV * 301static AV *
302coro_get_av (pTHX_ const char *name, int create)
303{
304#if PERL_VERSION_ATLEAST (5,10,0)
305 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
306 get_av (name, create);
307#endif
308 return get_av (name, create);
309}
310
311static HV *
312coro_get_hv (pTHX_ const char *name, int create)
313{
314#if PERL_VERSION_ATLEAST (5,10,0)
315 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
316 get_hv (name, create);
317#endif
318 return get_hv (name, create);
319}
320
321static AV *
171coro_clone_padlist (CV *cv) 322coro_clone_padlist (pTHX_ CV *cv)
172{ 323{
173 AV *padlist = CvPADLIST (cv); 324 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 325 AV *newpadlist, *newpad;
175 326
176 newpadlist = newAV (); 327 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 328 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 329#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 331#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 333#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 335 --AvFILLp (padlist);
185 336
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
187 av_store (newpadlist, 1, (SV *)newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
188 339
189 return newpadlist; 340 return newpadlist;
190} 341}
191 342
192static void 343static void
193free_padlist (AV *padlist) 344free_padlist (pTHX_ AV *padlist)
194{ 345{
195 /* may be during global destruction */ 346 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 347 if (SvREFCNT (padlist))
197 { 348 {
198 I32 i = AvFILLp (padlist); 349 I32 i = AvFILLp (padlist);
… …
219 AV *padlist; 370 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 371 AV *av = (AV *)mg->mg_obj;
221 372
222 /* casting is fun. */ 373 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 375 free_padlist (aTHX_ padlist);
225 376
226 SvREFCNT_dec (av); 377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 378
228 return 0; 379 return 0;
229} 380}
230 381
231#define PERL_MAGIC_coro PERL_MAGIC_ext 382#define CORO_MAGIC_type_cv PERL_MAGIC_ext
383#define CORO_MAGIC_type_state PERL_MAGIC_ext
232 384
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 385static MGVTBL coro_cv_vtbl = {
386 0, 0, 0, 0,
387 coro_cv_free
388};
389
390#define CORO_MAGIC(sv, type) \
391 SvMAGIC (sv) \
392 ? SvMAGIC (sv)->mg_type == type \
393 ? SvMAGIC (sv) \
394 : mg_find (sv, type) \
395 : 0
396
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
399
400static struct coro *
401SvSTATE_ (pTHX_ SV *coro)
402{
403 HV *stash;
404 MAGIC *mg;
405
406 if (SvROK (coro))
407 coro = SvRV (coro);
408
409 if (expect_false (SvTYPE (coro) != SVt_PVHV))
410 croak ("Coro::State object required");
411
412 stash = SvSTASH (coro);
413 if (expect_false (stash != coro_stash && stash != coro_state_stash))
414 {
415 /* very slow, but rare, check */
416 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
417 croak ("Coro::State object required");
418 }
419
420 mg = CORO_MAGIC_state (coro);
421 return (struct coro *)mg->mg_ptr;
422}
423
424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234 425
235/* the next two functions merely cache the padlists */ 426/* the next two functions merely cache the padlists */
236static void 427static void
237get_padlist (CV *cv) 428get_padlist (pTHX_ CV *cv)
238{ 429{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 430 MAGIC *mg = CORO_MAGIC_cv (cv);
431 AV *av;
240 432
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 433 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 434 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 435 else
244 { 436 {
245#if 0 437#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 438 /* this is probably cleaner? but also slower! */
439 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 440 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 441 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 442 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 443 SvREFCNT_dec (cp);
251#else 444#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 445 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 446#endif
254 } 447 }
255} 448}
256 449
257static void 450static void
258put_padlist (CV *cv) 451put_padlist (pTHX_ CV *cv)
259{ 452{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 453 MAGIC *mg = CORO_MAGIC_cv (cv);
454 AV *av;
261 455
262 if (!mg) 456 if (expect_false (!mg))
263 { 457 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 }
269 458
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 459 av = (AV *)mg->mg_obj;
271}
272 460
273#define SB do { 461 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274#define SE } while (0) 462 av_extend (av, AvMAX (av) + 1);
275 463
276#define LOAD(state) load_state((state)); 464 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277#define SAVE(state,flags) save_state((state),(flags)); 465}
278 466
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 467/** load & save, init *******************************************************/
280 468
281static void 469static void
282load_state(Coro__State c) 470load_perl (pTHX_ Coro__State c)
283{ 471{
284 PL_dowarn = c->dowarn; 472 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 473 c->slot = 0;
286 474
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 475 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 476
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 477 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 478 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 479 GvSV (PL_errgv) = slot->errsv;
480 GvSV (irsgv) = slot->irsgv;
481
482 #define VAR(name,type) PL_ ## name = slot->name;
483 # include "state.h"
484 #undef VAR
321 485
322 { 486 {
323 dSP; 487 dSP;
488
324 CV *cv; 489 CV *cv;
325 490
326 /* now do the ugly restore mess */ 491 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 492 while (expect_true (cv = (CV *)POPs))
328 { 493 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 494 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 495 CvDEPTH (cv) = PTR2IV (POPs);
335 } 496 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 497 }
339 498
340 PUTBACK; 499 PUTBACK;
341 } 500 }
342} 501}
343 502
344static void 503static void
345save_state(Coro__State c, int flags) 504save_perl (pTHX_ Coro__State c)
346{ 505{
347 { 506 {
348 dSP; 507 dSP;
349 I32 cxix = cxstack_ix; 508 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 509 PERL_CONTEXT *ccstk = cxstack;
… …
353 /* 512 /*
354 * the worst thing you can imagine happens first - we have to save 513 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 514 * (and reinitialize) all cv's in the whole callchain :(
356 */ 515 */
357 516
358 PUSHs (Nullsv); 517 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 518 /* this loop was inspired by pp_caller */
360 for (;;) 519 for (;;)
361 { 520 {
362 while (cxix >= 0) 521 while (expect_true (cxix >= 0))
363 { 522 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 523 PERL_CONTEXT *cx = &ccstk[cxix--];
365 524
366 if (CxTYPE(cx) == CXt_SUB) 525 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367 { 526 {
368 CV *cv = cx->blk_sub.cv; 527 CV *cv = cx->blk_sub.cv;
528
369 if (CvDEPTH(cv)) 529 if (expect_true (CvDEPTH (cv)))
370 { 530 {
371 EXTEND (SP, CvDEPTH(cv)*2); 531 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 532 PUSHs ((SV *)CvPADLIST (cv));
533 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 534 PUSHs ((SV *)cv);
382 535
536 CvDEPTH (cv) = 0;
383 get_padlist (cv); 537 get_padlist (aTHX_ cv);
384 } 538 }
385 } 539 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 540 }
395 541
396 if (top_si->si_type == PERLSI_MAIN) 542 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 543 break;
398 544
399 top_si = top_si->si_prev; 545 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 546 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 547 cxix = top_si->si_cxix;
402 } 548 }
403 549
404 PUTBACK; 550 PUTBACK;
405 } 551 }
406 552
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 553 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 554 /* we manually unroll here, as usually 2 slots is enough */
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 555 if (SLOT_COUNT >= 1) CXINC;
556 if (SLOT_COUNT >= 2) CXINC;
557 if (SLOT_COUNT >= 3) CXINC;
558 {
559 int i;
560 for (i = 3; i < SLOT_COUNT; ++i)
561 CXINC;
562 }
563 cxstack_ix -= SLOT_COUNT; /* undo allocation */
410 564
411 c->dowarn = PL_dowarn;
412 c->in_eval = PL_in_eval;
413
414 c->curstackinfo = PL_curstackinfo;
415 c->curstack = PL_curstack;
416 c->mainstack = PL_mainstack; 565 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 566
418 c->op = PL_op; 567 {
419 c->curpad = PL_curpad; 568 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 569
421 c->compcv = PL_compcv; 570 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 571 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 572 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 573 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 574
426 c->tmps_ix = PL_tmps_ix; 575 #define VAR(name,type) slot->name = PL_ ## name;
427 c->tmps_max = PL_tmps_max; 576 # include "state.h"
428 c->markstack = PL_markstack; 577 #undef VAR
429 c->markstack_ptr = PL_markstack_ptr; 578 }
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 579}
445 580
446/* 581/*
447 * allocate various perl stacks. This is an exact copy 582 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 583 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 584 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 585 * not usually need a lot of stackspace.
451 */ 586 */
587#if CORO_PREFER_PERL_FUNCTIONS
588# define coro_init_stacks init_stacks
589#else
452static void 590static void
453coro_init_stacks () 591coro_init_stacks (pTHX)
454{ 592{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 593 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 594 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 595 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 596 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 597
460 PL_stack_base = AvARRAY(PL_curstack); 598 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 599 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 600 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 601
464 New(50,PL_tmps_stack,96,SV*); 602 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 603 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 604 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 605 PL_tmps_max = 32;
468 606
469 New(54,PL_markstack,16,I32); 607 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 608 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 609 PL_markstack_max = PL_markstack + 16;
472 610
473#ifdef SET_MARK_OFFSET 611#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 612 SET_MARK_OFFSET;
475#endif 613#endif
476 614
477 New(54,PL_scopestack,16,I32); 615 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 616 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 617 PL_scopestack_max = 8;
480 618
481 New(54,PL_savestack,96,ANY); 619 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 620 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 621 PL_savestack_max = 24;
484 622
485#if !PERL_VERSION_ATLEAST (5,9,0) 623#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 624 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 625 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 626 PL_retstack_max = 4;
489#endif 627#endif
490} 628}
629#endif
491 630
492/* 631/*
493 * destroy the stacks, the callchain etc... 632 * destroy the stacks, the callchain etc...
494 */ 633 */
495static void 634static void
496destroy_stacks() 635coro_destruct_stacks (pTHX)
497{ 636{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 637 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 638 PL_curstackinfo = PL_curstackinfo->si_next;
511 639
512 while (PL_curstackinfo) 640 while (PL_curstackinfo)
513 { 641 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 642 PERL_SI *p = PL_curstackinfo->si_prev;
515 643
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 644 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 645 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 646
528 Safefree (PL_curstackinfo->si_cxstack); 647 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 648 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 649 PL_curstackinfo = p;
531 } 650 }
532 651
533 Safefree (PL_tmps_stack); 652 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 653 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 654 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 655 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 656#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 657 Safefree (PL_retstack);
539#endif 658#endif
540} 659}
541 660
661static size_t
662coro_rss (pTHX_ struct coro *coro)
663{
664 size_t rss = sizeof (*coro);
665
666 if (coro->mainstack)
667 {
668 perl_slots tmp_slot;
669 perl_slots *slot;
670
671 if (coro->flags & CF_RUNNING)
672 {
673 slot = &tmp_slot;
674
675 #define VAR(name,type) slot->name = PL_ ## name;
676 # include "state.h"
677 #undef VAR
678 }
679 else
680 slot = coro->slot;
681
682 if (slot)
683 {
684 rss += sizeof (slot->curstackinfo);
685 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
686 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
687 rss += slot->tmps_max * sizeof (SV *);
688 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
689 rss += slot->scopestack_max * sizeof (I32);
690 rss += slot->savestack_max * sizeof (ANY);
691
692#if !PERL_VERSION_ATLEAST (5,10,0)
693 rss += slot->retstack_max * sizeof (OP *);
694#endif
695 }
696 }
697
698 return rss;
699}
700
701/** coroutine stack handling ************************************************/
702
703static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
704static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
705static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
706
707/* apparently < 5.8.8 */
708#ifndef MgPV_nolen_const
709#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
710 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
711 (const char*)(mg)->mg_ptr)
712#endif
713
714/*
715 * This overrides the default magic get method of %SIG elements.
716 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
717 * and instead of tryign to save and restore the hash elements, we just provide
718 * readback here.
719 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
720 * not expecting this to actually change the hook. This is a potential problem
721 * when a schedule happens then, but we ignore this.
722 */
723static int
724coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
725{
726 const char *s = MgPV_nolen_const (mg);
727
728 if (*s == '_')
729 {
730 SV **svp = 0;
731
732 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
733 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
734
735 if (svp)
736 {
737 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
738 return 0;
739 }
740 }
741
742 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
743}
744
745static int
746coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 SV *old = *svp;
760 *svp = 0;
761 SvREFCNT_dec (old);
762 return 0;
763 }
764 }
765
766 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
767}
768
769static int
770coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
771{
772 const char *s = MgPV_nolen_const (mg);
773
774 if (*s == '_')
775 {
776 SV **svp = 0;
777
778 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
779 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
780
781 if (svp)
782 {
783 SV *old = *svp;
784 *svp = newSVsv (sv);
785 SvREFCNT_dec (old);
786 return 0;
787 }
788 }
789
790 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
791}
792
542static void 793static void
543setup_coro (struct coro *coro) 794coro_setup (pTHX_ struct coro *coro)
544{ 795{
545 /* 796 /*
546 * emulate part of the perl startup here. 797 * emulate part of the perl startup here.
547 */ 798 */
548 dTHX; 799 coro_init_stacks (aTHX);
800
801 PL_runops = RUNOPS_DEFAULT;
802 PL_curcop = &PL_compiling;
803 PL_in_eval = EVAL_NULL;
804 PL_comppad = 0;
805 PL_curpm = 0;
806 PL_curpad = 0;
807 PL_localizing = 0;
808 PL_dirty = 0;
809 PL_restartop = 0;
810#if PERL_VERSION_ATLEAST (5,10,0)
811 PL_parser = 0;
812#endif
813
814 /* recreate the die/warn hooks */
815 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
816 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
817
818 GvSV (PL_defgv) = newSV (0);
819 GvAV (PL_defgv) = coro->args; coro->args = 0;
820 GvSV (PL_errgv) = newSV (0);
821 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
822 PL_rs = newSVsv (GvSV (irsgv));
823 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
824
825 {
826 dSP;
827 LOGOP myop;
828
829 Zero (&myop, 1, LOGOP);
830 myop.op_next = Nullop;
831 myop.op_flags = OPf_WANT_VOID;
832
833 PUSHMARK (SP);
834 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
835 PUTBACK;
836 PL_op = (OP *)&myop;
837 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
838 SPAGAIN;
839 }
840
841 /* this newly created coroutine might be run on an existing cctx which most
842 * likely was suspended in set_stacklevel, called from entersub.
843 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
844 * so we ENTER here for symmetry
845 */
846 ENTER;
847}
848
849static void
850coro_destruct (pTHX_ struct coro *coro)
851{
852 if (!IN_DESTRUCT)
853 {
854 /* restore all saved variables and stuff */
855 LEAVE_SCOPE (0);
856 assert (PL_tmps_floor == -1);
857
858 /* free all temporaries */
859 FREETMPS;
860 assert (PL_tmps_ix == -1);
861
862 /* unwind all extra stacks */
863 POPSTACK_TO (PL_mainstack);
864
865 /* unwind main stack */
866 dounwind (-1);
867 }
868
869 SvREFCNT_dec (GvSV (PL_defgv));
870 SvREFCNT_dec (GvAV (PL_defgv));
871 SvREFCNT_dec (GvSV (PL_errgv));
872 SvREFCNT_dec (PL_defoutgv);
873 SvREFCNT_dec (PL_rs);
874 SvREFCNT_dec (GvSV (irsgv));
875
876 SvREFCNT_dec (PL_diehook);
877 SvREFCNT_dec (PL_warnhook);
878
879 SvREFCNT_dec (coro->saved_deffh);
880 SvREFCNT_dec (coro->throw);
881
882 coro_destruct_stacks (aTHX);
883}
884
885static void
886free_coro_mortal (pTHX)
887{
888 if (expect_true (coro_mortal))
889 {
890 SvREFCNT_dec (coro_mortal);
891 coro_mortal = 0;
892 }
893}
894
895static int
896runops_trace (pTHX)
897{
898 COP *oldcop = 0;
899 int oldcxix = -2;
900 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
901 coro_cctx *cctx = coro->cctx;
902
903 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
904 {
905 PERL_ASYNC_CHECK ();
906
907 if (cctx->flags & CC_TRACE_ALL)
908 {
909 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
910 {
911 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
912 SV **bot, **top;
913 AV *av = newAV (); /* return values */
914 SV **cb;
915 dSP;
916
917 GV *gv = CvGV (cx->blk_sub.cv);
918 SV *fullname = sv_2mortal (newSV (0));
919 if (isGV (gv))
920 gv_efullname3 (fullname, gv, 0);
921
922 bot = PL_stack_base + cx->blk_oldsp + 1;
923 top = cx->blk_gimme == G_ARRAY ? SP + 1
924 : cx->blk_gimme == G_SCALAR ? bot + 1
925 : bot;
926
927 av_extend (av, top - bot);
928 while (bot < top)
929 av_push (av, SvREFCNT_inc_NN (*bot++));
930
931 PL_runops = RUNOPS_DEFAULT;
932 ENTER;
933 SAVETMPS;
934 EXTEND (SP, 3);
935 PUSHMARK (SP);
936 PUSHs (&PL_sv_no);
937 PUSHs (fullname);
938 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
939 PUTBACK;
940 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
941 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
942 SPAGAIN;
943 FREETMPS;
944 LEAVE;
945 PL_runops = runops_trace;
946 }
947
948 if (oldcop != PL_curcop)
949 {
950 oldcop = PL_curcop;
951
952 if (PL_curcop != &PL_compiling)
953 {
954 SV **cb;
955
956 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
957 {
958 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
959
960 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
961 {
962 runops_proc_t old_runops = PL_runops;
963 dSP;
964 GV *gv = CvGV (cx->blk_sub.cv);
965 SV *fullname = sv_2mortal (newSV (0));
966
967 if (isGV (gv))
968 gv_efullname3 (fullname, gv, 0);
969
970 PL_runops = RUNOPS_DEFAULT;
971 ENTER;
972 SAVETMPS;
973 EXTEND (SP, 3);
974 PUSHMARK (SP);
975 PUSHs (&PL_sv_yes);
976 PUSHs (fullname);
977 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
978 PUTBACK;
979 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
980 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
981 SPAGAIN;
982 FREETMPS;
983 LEAVE;
984 PL_runops = runops_trace;
985 }
986
987 oldcxix = cxstack_ix;
988 }
989
990 if (cctx->flags & CC_TRACE_LINE)
991 {
992 dSP;
993
994 PL_runops = RUNOPS_DEFAULT;
995 ENTER;
996 SAVETMPS;
997 EXTEND (SP, 3);
998 PL_runops = RUNOPS_DEFAULT;
999 PUSHMARK (SP);
1000 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1001 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1002 PUTBACK;
1003 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1004 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1005 SPAGAIN;
1006 FREETMPS;
1007 LEAVE;
1008 PL_runops = runops_trace;
1009 }
1010 }
1011 }
1012 }
1013 }
1014
1015 TAINT_NOT;
1016 return 0;
1017}
1018
1019/* inject a fake call to Coro::State::_cctx_init into the execution */
1020/* _cctx_init should be careful, as it could be called at almost any time */
1021/* during execution of a perl program */
1022static void NOINLINE
1023cctx_prepare (pTHX_ coro_cctx *cctx)
1024{
549 dSP; 1025 dSP;
550 UNOP myop; 1026 LOGOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1027
553 coro_init_stacks (); 1028 PL_top_env = &PL_start_env;
554 /*PL_curcop = 0;*/
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1029
559 SPAGAIN; 1030 if (cctx->flags & CC_TRACE)
1031 PL_runops = runops_trace;
560 1032
561 Zero (&myop, 1, UNOP); 1033 Zero (&myop, 1, LOGOP);
562 myop.op_next = Nullop; 1034 myop.op_next = PL_op;
563 myop.op_flags = OPf_WANT_VOID; 1035 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564 1036
1037 PUSHMARK (SP);
1038 EXTEND (SP, 2);
1039 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1040 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1041 PUTBACK;
565 PL_op = (OP *)&myop; 1042 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1043 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571 SPAGAIN; 1044 SPAGAIN;
572
573 ENTER; /* necessary e.g. for dounwind */
574} 1045}
575 1046
1047/*
1048 * this is a _very_ stripped down perl interpreter ;)
1049 */
576static void 1050static void
577free_coro_mortal () 1051cctx_run (void *arg)
578{ 1052{
579 if (coro_mortal) 1053 dTHX;
580 { 1054
581 SvREFCNT_dec (coro_mortal); 1055 /* cctx_run is the alternative tail of transfer(), so unlock here. */
582 coro_mortal = 0; 1056 UNLOCK;
1057
1058 /* we now skip the entersub that lead to transfer() */
1059 PL_op = PL_op->op_next;
1060
1061 /* inject a fake subroutine call to cctx_init */
1062 cctx_prepare (aTHX_ (coro_cctx *)arg);
1063
1064 /* somebody or something will hit me for both perl_run and PL_restartop */
1065 PL_restartop = PL_op;
1066 perl_run (PL_curinterp);
1067
1068 /*
1069 * If perl-run returns we assume exit() was being called or the coro
1070 * fell off the end, which seems to be the only valid (non-bug)
1071 * reason for perl_run to return. We try to exit by jumping to the
1072 * bootstrap-time "top" top_env, as we cannot restore the "main"
1073 * coroutine as Coro has no such concept
1074 */
1075 PL_top_env = main_top_env;
1076 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1077}
1078
1079static coro_cctx *
1080cctx_new ()
1081{
1082 coro_cctx *cctx;
1083 void *stack_start;
1084 size_t stack_size;
1085
1086 ++cctx_count;
1087 Newz (0, cctx, 1, coro_cctx);
1088
1089 cctx->gen = cctx_gen;
1090
1091#if HAVE_MMAP
1092 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1093 /* mmap supposedly does allocate-on-write for us */
1094 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1095
1096 if (cctx->sptr != (void *)-1)
583 } 1097 {
584} 1098# if CORO_STACKGUARD
1099 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1100# endif
1101 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1102 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1103 cctx->flags |= CC_MAPPED;
1104 }
1105 else
1106#endif
1107 {
1108 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1109 New (0, cctx->sptr, cctx_stacksize, long);
585 1110
1111 if (!cctx->sptr)
1112 {
1113 perror ("FATAL: unable to allocate stack for coroutine");
1114 _exit (EXIT_FAILURE);
1115 }
1116
1117 stack_start = cctx->sptr;
1118 stack_size = cctx->ssize;
1119 }
1120
1121 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1122 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1123
1124 return cctx;
1125}
1126
1127static void
1128cctx_destroy (coro_cctx *cctx)
1129{
1130 if (!cctx)
1131 return;
1132
1133 --cctx_count;
1134 coro_destroy (&cctx->cctx);
1135
1136 /* coro_transfer creates new, empty cctx's */
1137 if (cctx->sptr)
1138 {
1139#if CORO_USE_VALGRIND
1140 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1141#endif
1142
1143#if HAVE_MMAP
1144 if (cctx->flags & CC_MAPPED)
1145 munmap (cctx->sptr, cctx->ssize);
1146 else
1147#endif
1148 Safefree (cctx->sptr);
1149 }
1150
1151 Safefree (cctx);
1152}
1153
1154/* wether this cctx should be destructed */
1155#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1156
1157static coro_cctx *
1158cctx_get (pTHX)
1159{
1160 while (expect_true (cctx_first))
1161 {
1162 coro_cctx *cctx = cctx_first;
1163 cctx_first = cctx->next;
1164 --cctx_idle;
1165
1166 if (expect_true (!CCTX_EXPIRED (cctx)))
1167 return cctx;
1168
1169 cctx_destroy (cctx);
1170 }
1171
1172 return cctx_new ();
1173}
1174
1175static void
1176cctx_put (coro_cctx *cctx)
1177{
1178 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1179
1180 /* free another cctx if overlimit */
1181 if (expect_false (cctx_idle >= cctx_max_idle))
1182 {
1183 coro_cctx *first = cctx_first;
1184 cctx_first = first->next;
1185 --cctx_idle;
1186
1187 cctx_destroy (first);
1188 }
1189
1190 ++cctx_idle;
1191 cctx->next = cctx_first;
1192 cctx_first = cctx;
1193}
1194
1195/** coroutine switching *****************************************************/
1196
1197static void
1198transfer_check (pTHX_ struct coro *prev, struct coro *next)
1199{
1200 if (expect_true (prev != next))
1201 {
1202 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1203 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1204
1205 if (expect_false (next->flags & CF_RUNNING))
1206 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1207
1208 if (expect_false (next->flags & CF_DESTROYED))
1209 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1210
1211#if !PERL_VERSION_ATLEAST (5,10,0)
1212 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1213 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1214#endif
1215 }
1216}
1217
1218/* always use the TRANSFER macro */
586static void NOINLINE 1219static void NOINLINE
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return;
669
670#if HAVE_MMAP
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675
676 Safefree (stack);
677}
678
679static coro_stack *stack_first;
680
681static coro_stack *
682stack_get ()
683{
684 coro_stack *stack;
685
686 if (stack_first)
687 {
688 stack = stack_first;
689 stack_first = stack->next;
690 }
691 else
692 {
693 stack = stack_new ();
694 PL_op = PL_op->op_next;
695 }
696
697 return stack;
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags) 1220transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
710{ 1221{
711 dSTACKLEVEL; 1222 dSTACKLEVEL;
712 1223
713 /* sometimes transfer is only called to set idle_sp */ 1224 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL) 1225 if (expect_false (!next))
1226 {
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1227 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
716 else if (prev != next) 1228 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
717 { 1229 }
1230 else if (expect_true (prev != next))
1231 {
1232 static volatile int has_throw;
718 coro_stack *prev__stack; 1233 coro_cctx *prev__cctx;
1234
1235 if (expect_false (prev->flags & CF_NEW))
1236 {
1237 /* create a new empty/source context */
1238 ++cctx_count;
1239 New (0, prev->cctx, 1, coro_cctx);
1240 prev->cctx->sptr = 0;
1241 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1242
1243 prev->flags &= ~CF_NEW;
1244 prev->flags |= CF_RUNNING;
1245 }
1246
1247 prev->flags &= ~CF_RUNNING;
1248 next->flags |= CF_RUNNING;
719 1249
720 LOCK; 1250 LOCK;
721 1251
722 if (next->mainstack) 1252 /* first get rid of the old state */
1253 save_perl (aTHX_ prev);
1254
1255 if (expect_false (next->flags & CF_NEW))
723 { 1256 {
724 /* coroutine already started */ 1257 /* need to start coroutine */
725 SAVE (prev, flags); 1258 next->flags &= ~CF_NEW;
726 LOAD (next); 1259 /* setup coroutine call */
1260 coro_setup (aTHX_ next);
727 } 1261 }
728 else 1262 else
1263 load_perl (aTHX_ next);
1264
1265 prev__cctx = prev->cctx;
1266
1267 /* possibly "free" the cctx */
1268 if (expect_true (
1269 prev__cctx->idle_sp == STACKLEVEL
1270 && !(prev__cctx->flags & CC_TRACE)
1271 && !force_cctx
1272 ))
729 { 1273 {
730 /* need to start coroutine */ 1274 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
731 /* first get rid of the old state */ 1275 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
732 SAVE (prev, -1); 1276
733 /* setup coroutine call */ 1277 prev->cctx = 0;
734 setup_coro (next); 1278
735 /* need a stack */ 1279 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
736 next->stack = 0; 1280 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1281 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1282 if (!next->cctx)
1283 next->cctx = cctx_get (aTHX);
1284
1285 cctx_put (prev__cctx);
737 } 1286 }
738 1287
739 if (!prev->stack) 1288 ++next->usecount;
740 /* create a new empty context */
741 Newz (0, prev->stack, 1, coro_stack);
742 1289
743 prev__stack = prev->stack; 1290 if (expect_true (!next->cctx))
1291 next->cctx = cctx_get (aTHX);
744 1292
745 /* possibly "free" the stack */ 1293 has_throw = !!next->throw;
746 if (prev__stack->idle_sp == STACKLEVEL) 1294
1295 if (expect_false (prev__cctx != next->cctx))
747 { 1296 {
748 stack_put (prev__stack); 1297 prev__cctx->top_env = PL_top_env;
749 prev->stack = 0; 1298 PL_top_env = next->cctx->top_env;
1299 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
750 } 1300 }
751 1301
752 if (!next->stack) 1302 free_coro_mortal (aTHX);
753 next->stack = stack_get (); 1303 UNLOCK;
754 1304
755 if (prev__stack != next->stack) 1305 if (expect_false (has_throw))
756 { 1306 {
757 prev__stack->top_env = PL_top_env; 1307 struct coro *coro = SvSTATE (coro_current);
758 PL_top_env = next->stack->top_env; 1308
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1309 if (coro->throw)
1310 {
1311 SV *exception = coro->throw;
1312 coro->throw = 0;
1313 sv_setsv (ERRSV, exception);
1314 croak (0);
1315 }
760 } 1316 }
1317 }
1318}
761 1319
762 free_coro_mortal (); 1320struct transfer_args
1321{
1322 struct coro *prev, *next;
1323};
763 1324
1325#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1326#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1327
1328/** high level stuff ********************************************************/
1329
1330static int
1331coro_state_destroy (pTHX_ struct coro *coro)
1332{
1333 if (coro->flags & CF_DESTROYED)
1334 return 0;
1335
1336 coro->flags |= CF_DESTROYED;
1337
1338 if (coro->flags & CF_READY)
1339 {
1340 /* reduce nready, as destroying a ready coro effectively unreadies it */
1341 /* alternative: look through all ready queues and remove the coro */
1342 LOCK;
1343 --coro_nready;
764 UNLOCK; 1344 UNLOCK;
765 } 1345 }
766} 1346 else
767 1347 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781 1348
782 if (coro->mainstack && coro->mainstack != main_mainstack) 1349 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 1350 {
784 struct coro temp; 1351 struct coro temp;
785 1352
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 1353 if (coro->flags & CF_RUNNING)
787 LOAD (coro); 1354 croak ("FATAL: tried to destroy currently running coroutine");
788 1355
789 destroy_stacks (); 1356 save_perl (aTHX_ &temp);
1357 load_perl (aTHX_ coro);
790 1358
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1359 coro_destruct (aTHX_ coro);
792 1360
1361 load_perl (aTHX_ &temp);
1362
793 coro->mainstack = 0; 1363 coro->slot = 0;
794 } 1364 }
795 1365
796 stack_free (coro->stack); 1366 cctx_destroy (coro->cctx);
797 SvREFCNT_dec (coro->args); 1367 SvREFCNT_dec (coro->args);
798 Safefree (coro); 1368
1369 if (coro->next) coro->next->prev = coro->prev;
1370 if (coro->prev) coro->prev->next = coro->next;
1371 if (coro == coro_first) coro_first = coro->next;
1372
1373 return 1;
799} 1374}
800 1375
801static int 1376static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1377coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803{ 1378{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1379 struct coro *coro = (struct coro *)mg->mg_ptr;
805 mg->mg_ptr = 0; 1380 mg->mg_ptr = 0;
806 1381
1382 coro->hv = 0;
1383
1384 if (--coro->refcnt < 0)
1385 {
807 coro_state_destroy (coro); 1386 coro_state_destroy (aTHX_ coro);
1387 Safefree (coro);
1388 }
808 1389
809 return 0; 1390 return 0;
810} 1391}
811 1392
812static int 1393static int
… …
819 return 0; 1400 return 0;
820} 1401}
821 1402
822static MGVTBL coro_state_vtbl = { 1403static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0, 1404 0, 0, 0, 0,
824 coro_state_clear, 1405 coro_state_free,
825 0, 1406 0,
826#ifdef MGf_DUP 1407#ifdef MGf_DUP
827 coro_state_dup, 1408 coro_state_dup,
1409#else
1410# define MGf_DUP 0
828#endif 1411#endif
829}; 1412};
830 1413
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void 1414static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1415prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1416{
856 ta->prev = SvSTATE (prev); 1417 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1418 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1419 TRANSFER_CHECK (*ta);
859} 1420}
860 1421
861static void 1422static void
862api_transfer (SV *prev, SV *next, int flags) 1423api_transfer (SV *prev_sv, SV *next_sv)
863{ 1424{
864 dTHX; 1425 dTHX;
865 struct transfer_args ta; 1426 struct transfer_args ta;
866 1427
867 prepare_transfer (&ta, prev, next, flags); 1428 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868 TRANSFER (ta); 1429 TRANSFER (ta, 1);
869} 1430}
870 1431
871/** Coro ********************************************************************/ 1432/** Coro ********************************************************************/
872 1433
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 1434static void
886coro_enq (SV *sv) 1435coro_enq (pTHX_ SV *coro_sv)
1436{
1437 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1438}
1439
1440static SV *
1441coro_deq (pTHX)
887{ 1442{
888 int prio; 1443 int prio;
889 1444
890 if (SvTYPE (sv) != SVt_PVHV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893 prio = SvSTATE (sv)->prio;
894
895 av_push (coro_ready [prio - PRIO_MIN], sv);
896 coro_nready++;
897}
898
899static SV *
900coro_deq (int min_prio)
901{
902 int prio = PRIO_MAX - PRIO_MIN;
903
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1445 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
909 if (AvFILLp (coro_ready [prio]) >= 0) 1446 if (AvFILLp (coro_ready [prio]) >= 0)
910 {
911 coro_nready--;
912 return av_shift (coro_ready [prio]); 1447 return av_shift (coro_ready [prio]);
913 }
914 1448
915 return 0; 1449 return 0;
916} 1450}
917 1451
1452static int
1453api_ready (SV *coro_sv)
1454{
1455 dTHX;
1456 struct coro *coro;
1457 SV *sv_hook;
1458 void (*xs_hook)(void);
1459
1460 if (SvROK (coro_sv))
1461 coro_sv = SvRV (coro_sv);
1462
1463 coro = SvSTATE (coro_sv);
1464
1465 if (coro->flags & CF_READY)
1466 return 0;
1467
1468 coro->flags |= CF_READY;
1469
1470 LOCK;
1471
1472 sv_hook = coro_nready ? 0 : coro_readyhook;
1473 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1474
1475 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1476 ++coro_nready;
1477
1478 UNLOCK;
1479
1480 if (sv_hook)
1481 {
1482 dSP;
1483
1484 ENTER;
1485 SAVETMPS;
1486
1487 PUSHMARK (SP);
1488 PUTBACK;
1489 call_sv (sv_hook, G_DISCARD);
1490 SPAGAIN;
1491
1492 FREETMPS;
1493 LEAVE;
1494 }
1495
1496 if (xs_hook)
1497 xs_hook ();
1498
1499 return 1;
1500}
1501
1502static int
1503api_is_ready (SV *coro_sv)
1504{
1505 dTHX;
1506 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1507}
1508
918static void 1509static void
919api_ready (SV *coro) 1510prepare_schedule (pTHX_ struct transfer_args *ta)
920{ 1511{
921 dTHX; 1512 SV *prev_sv, *next_sv;
922 1513
923 if (SvROK (coro)) 1514 for (;;)
924 coro = SvRV (coro); 1515 {
1516 LOCK;
1517 next_sv = coro_deq (aTHX);
1518
1519 /* nothing to schedule: call the idle handler */
1520 if (expect_false (!next_sv))
1521 {
1522 dSP;
1523 UNLOCK;
1524
1525 ENTER;
1526 SAVETMPS;
1527
1528 PUSHMARK (SP);
1529 PUTBACK;
1530 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1531 SPAGAIN;
1532
1533 FREETMPS;
1534 LEAVE;
1535 continue;
1536 }
1537
1538 ta->next = SvSTATE (next_sv);
1539
1540 /* cannot transfer to destroyed coros, skip and look for next */
1541 if (expect_false (ta->next->flags & CF_DESTROYED))
1542 {
1543 UNLOCK;
1544 SvREFCNT_dec (next_sv);
1545 /* coro_nready is already taken care of by destroy */
1546 continue;
1547 }
1548
1549 --coro_nready;
1550 UNLOCK;
1551 break;
1552 }
1553
1554 /* free this only after the transfer */
1555 prev_sv = SvRV (coro_current);
1556 ta->prev = SvSTATE (prev_sv);
1557 TRANSFER_CHECK (*ta);
1558 assert (ta->next->flags & CF_READY);
1559 ta->next->flags &= ~CF_READY;
1560 SvRV_set (coro_current, next_sv);
925 1561
926 LOCK; 1562 LOCK;
927 coro_enq (SvREFCNT_inc (coro)); 1563 free_coro_mortal (aTHX);
1564 coro_mortal = prev_sv;
928 UNLOCK; 1565 UNLOCK;
929} 1566}
930 1567
931static void 1568static void
932prepare_schedule (struct transfer_args *ta)
933{
934 SV *current, *prev, *next;
935
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946
947 {
948 dSP;
949
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 }
960 }
961
962 prev = SvRV (current);
963 SvRV (current) = next;
964
965 /* free this only after the transfer */
966 LOCK;
967 free_coro_mortal ();
968 UNLOCK;
969 coro_mortal = prev;
970
971 ta->prev = SvSTATE (prev);
972 ta->next = SvSTATE (next);
973 ta->flags = TRANSFER_SAVE_ALL;
974}
975
976static void
977prepare_cede (struct transfer_args *ta) 1569prepare_cede (pTHX_ struct transfer_args *ta)
978{ 1570{
979 LOCK; 1571 api_ready (coro_current);
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982
983 prepare_schedule (ta); 1572 prepare_schedule (aTHX_ ta);
1573}
1574
1575static int
1576prepare_cede_notself (pTHX_ struct transfer_args *ta)
1577{
1578 if (coro_nready)
1579 {
1580 SV *prev = SvRV (coro_current);
1581 prepare_schedule (aTHX_ ta);
1582 api_ready (prev);
1583 return 1;
1584 }
1585 else
1586 return 0;
984} 1587}
985 1588
986static void 1589static void
987api_schedule (void) 1590api_schedule (void)
988{ 1591{
989 dTHX; 1592 dTHX;
990 struct transfer_args ta; 1593 struct transfer_args ta;
991 1594
992 prepare_schedule (&ta); 1595 prepare_schedule (aTHX_ &ta);
993 TRANSFER (ta); 1596 TRANSFER (ta, 1);
994} 1597}
995 1598
996static void 1599static int
997api_cede (void) 1600api_cede (void)
998{ 1601{
999 dTHX; 1602 dTHX;
1000 struct transfer_args ta; 1603 struct transfer_args ta;
1001 1604
1002 prepare_cede (&ta); 1605 prepare_cede (aTHX_ &ta);
1606
1607 if (expect_true (ta.prev != ta.next))
1608 {
1003 TRANSFER (ta); 1609 TRANSFER (ta, 1);
1610 return 1;
1611 }
1612 else
1613 return 0;
1004} 1614}
1005 1615
1616static int
1617api_cede_notself (void)
1618{
1619 dTHX;
1620 struct transfer_args ta;
1621
1622 if (prepare_cede_notself (aTHX_ &ta))
1623 {
1624 TRANSFER (ta, 1);
1625 return 1;
1626 }
1627 else
1628 return 0;
1629}
1630
1631static void
1632api_trace (SV *coro_sv, int flags)
1633{
1634 dTHX;
1635 struct coro *coro = SvSTATE (coro_sv);
1636
1637 if (flags & CC_TRACE)
1638 {
1639 if (!coro->cctx)
1640 coro->cctx = cctx_new ();
1641 else if (!(coro->cctx->flags & CC_TRACE))
1642 croak ("cannot enable tracing on coroutine with custom stack");
1643
1644 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1645 }
1646 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1647 {
1648 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1649
1650 if (coro->flags & CF_RUNNING)
1651 PL_runops = RUNOPS_DEFAULT;
1652 else
1653 coro->slot->runops = RUNOPS_DEFAULT;
1654 }
1655}
1656
1657static int
1658coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1659{
1660 AV *padlist;
1661 AV *av = (AV *)mg->mg_obj;
1662
1663 abort ();
1664
1665 return 0;
1666}
1667
1668static MGVTBL coro_gensub_vtbl = {
1669 0, 0, 0, 0,
1670 coro_gensub_free
1671};
1672
1673/*****************************************************************************/
1674/* PerlIO::cede */
1675
1676typedef struct
1677{
1678 PerlIOBuf base;
1679 NV next, every;
1680} PerlIOCede;
1681
1682static IV
1683PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1684{
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686
1687 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1688 self->next = nvtime () + self->every;
1689
1690 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1691}
1692
1693static SV *
1694PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1695{
1696 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1697
1698 return newSVnv (self->every);
1699}
1700
1701static IV
1702PerlIOCede_flush (pTHX_ PerlIO *f)
1703{
1704 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1705 double now = nvtime ();
1706
1707 if (now >= self->next)
1708 {
1709 api_cede ();
1710 self->next = now + self->every;
1711 }
1712
1713 return PerlIOBuf_flush (aTHX_ f);
1714}
1715
1716static PerlIO_funcs PerlIO_cede =
1717{
1718 sizeof(PerlIO_funcs),
1719 "cede",
1720 sizeof(PerlIOCede),
1721 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1722 PerlIOCede_pushed,
1723 PerlIOBuf_popped,
1724 PerlIOBuf_open,
1725 PerlIOBase_binmode,
1726 PerlIOCede_getarg,
1727 PerlIOBase_fileno,
1728 PerlIOBuf_dup,
1729 PerlIOBuf_read,
1730 PerlIOBuf_unread,
1731 PerlIOBuf_write,
1732 PerlIOBuf_seek,
1733 PerlIOBuf_tell,
1734 PerlIOBuf_close,
1735 PerlIOCede_flush,
1736 PerlIOBuf_fill,
1737 PerlIOBase_eof,
1738 PerlIOBase_error,
1739 PerlIOBase_clearerr,
1740 PerlIOBase_setlinebuf,
1741 PerlIOBuf_get_base,
1742 PerlIOBuf_bufsiz,
1743 PerlIOBuf_get_ptr,
1744 PerlIOBuf_get_cnt,
1745 PerlIOBuf_set_ptrcnt,
1746};
1747
1748
1006MODULE = Coro::State PACKAGE = Coro::State 1749MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 1750
1008PROTOTYPES: DISABLE 1751PROTOTYPES: DISABLE
1009 1752
1010BOOT: 1753BOOT:
1011{ 1754{
1012#ifdef USE_ITHREADS 1755#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 1756 MUTEX_INIT (&coro_lock);
1014#endif 1757#endif
1015 BOOT_PAGESIZE; 1758 BOOT_PAGESIZE;
1016 1759
1760 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1761 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1762
1763 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1764 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1765 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1766
1767 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1768 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1769 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1770
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1771 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 1772
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1773 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1774 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1775 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1776 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 1777
1023 main_mainstack = PL_mainstack; 1778 main_mainstack = PL_mainstack;
1779 main_top_env = PL_top_env;
1024 1780
1781 while (main_top_env->je_prev)
1782 main_top_env = main_top_env->je_prev;
1783
1025 coroapi.ver = CORO_API_VERSION; 1784 coroapi.ver = CORO_API_VERSION;
1785 coroapi.rev = CORO_API_REVISION;
1026 coroapi.transfer = api_transfer; 1786 coroapi.transfer = api_transfer;
1787
1788 {
1789 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1790
1791 if (!svp) croak ("Time::HiRes is required");
1792 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1793
1794 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1795 }
1027 1796
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1797 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1029} 1798}
1030 1799
1031SV * 1800SV *
1032new (char *klass, ...) 1801new (char *klass, ...)
1033 CODE: 1802 CODE:
1034{ 1803{
1035 struct coro *coro; 1804 struct coro *coro;
1805 MAGIC *mg;
1036 HV *hv; 1806 HV *hv;
1037 int i; 1807 int i;
1038 1808
1039 Newz (0, coro, 1, struct coro); 1809 Newz (0, coro, 1, struct coro);
1040 coro->args = newAV (); 1810 coro->args = newAV ();
1811 coro->flags = CF_NEW;
1041 1812
1813 if (coro_first) coro_first->prev = coro;
1814 coro->next = coro_first;
1815 coro_first = coro;
1816
1042 hv = newHV (); 1817 coro->hv = hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1818 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1819 mg->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1820 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045 1821
1822 av_extend (coro->args, items - 1);
1046 for (i = 1; i < items; i++) 1823 for (i = 1; i < items; i++)
1047 av_push (coro->args, newSVsv (ST (i))); 1824 av_push (coro->args, newSVsv (ST (i)));
1048
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1050 /*coro->stack = 0;*/
1051} 1825}
1052 OUTPUT: 1826 OUTPUT:
1053 RETVAL 1827 RETVAL
1054 1828
1829# these not obviously related functions are all rolled into the same xs
1830# function to increase chances that they all will call transfer with the same
1831# stack offset
1055void 1832void
1056_set_stacklevel (...) 1833_set_stacklevel (...)
1057 ALIAS: 1834 ALIAS:
1058 Coro::State::transfer = 1 1835 Coro::State::transfer = 1
1059 Coro::schedule = 2 1836 Coro::schedule = 2
1060 Coro::cede = 3 1837 Coro::cede = 3
1061 Coro::Cont::yield = 4 1838 Coro::cede_notself = 4
1062 CODE: 1839 CODE:
1063{ 1840{
1064 struct transfer_args ta; 1841 struct transfer_args ta;
1065 1842
1843 PUTBACK;
1066 switch (ix) 1844 switch (ix)
1067 { 1845 {
1068 case 0: 1846 case 0:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1847 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1070 ta.next = 0; 1848 ta.next = 0;
1071 ta.flags = TRANSFER_SET_STACKLEVEL;
1072 break; 1849 break;
1073 1850
1074 case 1: 1851 case 1:
1075 if (items != 3) 1852 if (items != 2)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1853 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1077 1854
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1855 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079 break; 1856 break;
1080 1857
1081 case 2: 1858 case 2:
1082 prepare_schedule (&ta); 1859 prepare_schedule (aTHX_ &ta);
1083 break; 1860 break;
1084 1861
1085 case 3: 1862 case 3:
1086 prepare_cede (&ta); 1863 prepare_cede (aTHX_ &ta);
1087 break; 1864 break;
1088 1865
1089 case 4: 1866 case 4:
1090 { 1867 if (!prepare_cede_notself (aTHX_ &ta))
1091 SV *yieldstack; 1868 XSRETURN_EMPTY;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094 1869
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break; 1870 break;
1114
1115 } 1871 }
1872 SPAGAIN;
1116 1873
1874 BARRIER;
1875 PUTBACK;
1117 TRANSFER (ta); 1876 TRANSFER (ta, 0);
1877 SPAGAIN; /* might be the sp of a different coroutine now */
1878 /* be extra careful not to ever do anything after TRANSFER */
1118} 1879}
1880
1881bool
1882_destroy (SV *coro_sv)
1883 CODE:
1884 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1885 OUTPUT:
1886 RETVAL
1119 1887
1120void 1888void
1121_clone_state_from (SV *dst, SV *src)
1122 CODE:
1123{
1124 struct coro *coro_src = SvSTATE (src);
1125
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128 ++coro_src->refcnt;
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130}
1131
1132void
1133_exit (code) 1889_exit (int code)
1134 int code
1135 PROTOTYPE: $ 1890 PROTOTYPE: $
1136 CODE: 1891 CODE:
1137 _exit (code); 1892 _exit (code);
1138 1893
1894int
1895cctx_stacksize (int new_stacksize = 0)
1896 CODE:
1897 RETVAL = cctx_stacksize;
1898 if (new_stacksize)
1899 {
1900 cctx_stacksize = new_stacksize;
1901 ++cctx_gen;
1902 }
1903 OUTPUT:
1904 RETVAL
1905
1906int
1907cctx_max_idle (int max_idle = 0)
1908 CODE:
1909 RETVAL = cctx_max_idle;
1910 if (max_idle > 1)
1911 cctx_max_idle = max_idle;
1912 OUTPUT:
1913 RETVAL
1914
1915int
1916cctx_count ()
1917 CODE:
1918 RETVAL = cctx_count;
1919 OUTPUT:
1920 RETVAL
1921
1922int
1923cctx_idle ()
1924 CODE:
1925 RETVAL = cctx_idle;
1926 OUTPUT:
1927 RETVAL
1928
1929void
1930list ()
1931 PPCODE:
1932{
1933 struct coro *coro;
1934 for (coro = coro_first; coro; coro = coro->next)
1935 if (coro->hv)
1936 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1937}
1938
1939void
1940call (Coro::State coro, SV *coderef)
1941 ALIAS:
1942 eval = 1
1943 CODE:
1944{
1945 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1946 {
1947 struct coro temp;
1948
1949 if (!(coro->flags & CF_RUNNING))
1950 {
1951 PUTBACK;
1952 save_perl (aTHX_ &temp);
1953 load_perl (aTHX_ coro);
1954 }
1955
1956 {
1957 dSP;
1958 ENTER;
1959 SAVETMPS;
1960 PUTBACK;
1961 PUSHSTACK;
1962 PUSHMARK (SP);
1963
1964 if (ix)
1965 eval_sv (coderef, 0);
1966 else
1967 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1968
1969 POPSTACK;
1970 SPAGAIN;
1971 FREETMPS;
1972 LEAVE;
1973 PUTBACK;
1974 }
1975
1976 if (!(coro->flags & CF_RUNNING))
1977 {
1978 save_perl (aTHX_ coro);
1979 load_perl (aTHX_ &temp);
1980 SPAGAIN;
1981 }
1982 }
1983}
1984
1985SV *
1986is_ready (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 is_ready = CF_READY
1990 is_running = CF_RUNNING
1991 is_new = CF_NEW
1992 is_destroyed = CF_DESTROYED
1993 CODE:
1994 RETVAL = boolSV (coro->flags & ix);
1995 OUTPUT:
1996 RETVAL
1997
1998void
1999api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2000
2001SV *
2002has_cctx (Coro::State coro)
2003 PROTOTYPE: $
2004 CODE:
2005 RETVAL = boolSV (!!coro->cctx);
2006 OUTPUT:
2007 RETVAL
2008
2009int
2010is_traced (Coro::State coro)
2011 PROTOTYPE: $
2012 CODE:
2013 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2014 OUTPUT:
2015 RETVAL
2016
2017IV
2018rss (Coro::State coro)
2019 PROTOTYPE: $
2020 ALIAS:
2021 usecount = 1
2022 CODE:
2023 switch (ix)
2024 {
2025 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2026 case 1: RETVAL = coro->usecount; break;
2027 }
2028 OUTPUT:
2029 RETVAL
2030
2031void
2032force_cctx ()
2033 CODE:
2034 struct coro *coro = SvSTATE (coro_current);
2035 coro->cctx->idle_sp = 0;
2036
2037void
2038swap_defsv (Coro::State self)
2039 PROTOTYPE: $
2040 ALIAS:
2041 swap_defav = 1
2042 CODE:
2043 if (!self->slot)
2044 croak ("cannot swap state with coroutine that has no saved state");
2045 else
2046 {
2047 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2048 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2049
2050 SV *tmp = *src; *src = *dst; *dst = tmp;
2051 }
2052
1139MODULE = Coro::State PACKAGE = Coro 2053MODULE = Coro::State PACKAGE = Coro
1140 2054
1141BOOT: 2055BOOT:
1142{ 2056{
1143 int i; 2057 int i;
1144 2058
2059 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2060 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2061 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2062
2063 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2064 SvREADONLY_on (coro_current);
2065
1145 coro_stash = gv_stashpv ("Coro", TRUE); 2066 coro_stash = gv_stashpv ("Coro", TRUE);
1146 2067
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2068 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2069 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2070 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2071 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2072 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2073 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153 2074
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2075 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV (); 2076 coro_ready[i] = newAV ();
1159 2077
1160 { 2078 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 2079 SV *sv = perl_get_sv ("Coro::API", TRUE);
2080 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1162 2081
1163 coroapi.schedule = api_schedule; 2082 coroapi.schedule = api_schedule;
1164 coroapi.cede = api_cede; 2083 coroapi.cede = api_cede;
2084 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 2085 coroapi.ready = api_ready;
2086 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 2087 coroapi.nready = &coro_nready;
1167 coroapi.current = coro_current; 2088 coroapi.current = coro_current;
1168 2089
1169 GCoroAPI = &coroapi; 2090 GCoroAPI = &coroapi;
1170 sv_setiv (sv, (IV)&coroapi); 2091 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 2092 SvREADONLY_on (sv);
1172 } 2093 }
1173} 2094}
2095
2096void
2097_set_current (SV *current)
2098 PROTOTYPE: $
2099 CODE:
2100 SvREFCNT_dec (SvRV (coro_current));
2101 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2102
2103void
2104_set_readyhook (SV *hook)
2105 PROTOTYPE: $
2106 CODE:
2107 LOCK;
2108 SvREFCNT_dec (coro_readyhook);
2109 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2110 UNLOCK;
1174 2111
1175int 2112int
1176prio (Coro::State coro, int newprio = 0) 2113prio (Coro::State coro, int newprio = 0)
1177 ALIAS: 2114 ALIAS:
1178 nice = 1 2115 nice = 1
… …
1181 RETVAL = coro->prio; 2118 RETVAL = coro->prio;
1182 2119
1183 if (items > 1) 2120 if (items > 1)
1184 { 2121 {
1185 if (ix) 2122 if (ix)
1186 newprio += coro->prio; 2123 newprio = coro->prio - newprio;
1187 2124
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2125 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2126 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190 2127
1191 coro->prio = newprio; 2128 coro->prio = newprio;
1192 } 2129 }
1193} 2130}
2131 OUTPUT:
2132 RETVAL
1194 2133
1195void 2134SV *
1196ready (SV *self) 2135ready (SV *self)
1197 PROTOTYPE: $ 2136 PROTOTYPE: $
1198 CODE: 2137 CODE:
1199 api_ready (self); 2138 RETVAL = boolSV (api_ready (self));
2139 OUTPUT:
2140 RETVAL
1200 2141
1201int 2142int
1202nready (...) 2143nready (...)
1203 PROTOTYPE: 2144 PROTOTYPE:
1204 CODE: 2145 CODE:
1205 RETVAL = coro_nready; 2146 RETVAL = coro_nready;
1206 OUTPUT: 2147 OUTPUT:
1207 RETVAL 2148 RETVAL
1208 2149
1209MODULE = Coro::State PACKAGE = Coro::AIO 2150void
2151throw (Coro::State self, SV *throw = &PL_sv_undef)
2152 PROTOTYPE: $;$
2153 CODE:
2154 SvREFCNT_dec (self->throw);
2155 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2156
2157# for async_pool speedup
2158void
2159_pool_1 (SV *cb)
2160 CODE:
2161{
2162 struct coro *coro = SvSTATE (coro_current);
2163 HV *hv = (HV *)SvRV (coro_current);
2164 AV *defav = GvAV (PL_defgv);
2165 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2166 AV *invoke_av;
2167 int i, len;
2168
2169 if (!invoke)
2170 {
2171 SV *old = PL_diehook;
2172 PL_diehook = 0;
2173 SvREFCNT_dec (old);
2174 croak ("\3async_pool terminate\2\n");
2175 }
2176
2177 SvREFCNT_dec (coro->saved_deffh);
2178 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2179
2180 hv_store (hv, "desc", sizeof ("desc") - 1,
2181 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2182
2183 invoke_av = (AV *)SvRV (invoke);
2184 len = av_len (invoke_av);
2185
2186 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2187
2188 if (len > 0)
2189 {
2190 av_fill (defav, len - 1);
2191 for (i = 0; i < len; ++i)
2192 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2193 }
2194
2195 SvREFCNT_dec (invoke);
2196}
2197
2198void
2199_pool_2 (SV *cb)
2200 CODE:
2201{
2202 struct coro *coro = SvSTATE (coro_current);
2203
2204 sv_setsv (cb, &PL_sv_undef);
2205
2206 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2207 coro->saved_deffh = 0;
2208
2209 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2210 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2211 {
2212 SV *old = PL_diehook;
2213 PL_diehook = 0;
2214 SvREFCNT_dec (old);
2215 croak ("\3async_pool terminate\2\n");
2216 }
2217
2218 av_clear (GvAV (PL_defgv));
2219 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2220 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2221
2222 coro->prio = 0;
2223
2224 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2225 api_trace (coro_current, 0);
2226
2227 av_push (av_async_pool, newSVsv (coro_current));
2228}
2229
2230#if 0
2231
2232void
2233_generator_call (...)
2234 PROTOTYPE: @
2235 PPCODE:
2236 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2237 xxxx
2238 abort ();
1210 2239
1211SV * 2240SV *
1212_get_state () 2241gensub (SV *sub, ...)
1213 CODE: 2242 PROTOTYPE: &;@
2243 CODE:
1214{ 2244{
1215 struct { 2245 struct coro *coro;
1216 int errorno; 2246 MAGIC *mg;
1217 int laststype; 2247 CV *xcv;
1218 int laststatval; 2248 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1219 Stat_t statcache; 2249 int i;
1220 } data;
1221 2250
1222 data.errorno = errno; 2251 CvGV (ncv) = CvGV (cv);
1223 data.laststype = PL_laststype; 2252 CvFILE (ncv) = CvFILE (cv);
1224 data.laststatval = PL_laststatval;
1225 data.statcache = PL_statcache;
1226 2253
1227 RETVAL = newSVpvn ((char *)&data, sizeof data); 2254 Newz (0, coro, 1, struct coro);
2255 coro->args = newAV ();
2256 coro->flags = CF_NEW;
2257
2258 av_extend (coro->args, items - 1);
2259 for (i = 1; i < items; i++)
2260 av_push (coro->args, newSVsv (ST (i)));
2261
2262 CvISXSUB_on (ncv);
2263 CvXSUBANY (ncv).any_ptr = (void *)coro;
2264
2265 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2266
2267 CvXSUB (ncv) = CvXSUB (xcv);
2268 CvANON_on (ncv);
2269
2270 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2271 RETVAL = newRV_noinc ((SV *)ncv);
1228} 2272}
1229 OUTPUT: 2273 OUTPUT:
1230 RETVAL 2274 RETVAL
1231 2275
2276#endif
2277
2278
2279MODULE = Coro::State PACKAGE = Coro::AIO
2280
1232void 2281void
1233_set_state (char *data_) 2282_get_state (SV *self)
2283 PPCODE:
2284{
2285 AV *defav = GvAV (PL_defgv);
2286 AV *av = newAV ();
2287 int i;
2288 SV *data_sv = newSV (sizeof (struct io_state));
2289 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2290 SvCUR_set (data_sv, sizeof (struct io_state));
2291 SvPOK_only (data_sv);
2292
2293 data->errorno = errno;
2294 data->laststype = PL_laststype;
2295 data->laststatval = PL_laststatval;
2296 data->statcache = PL_statcache;
2297
2298 av_extend (av, AvFILLp (defav) + 1 + 1);
2299
2300 for (i = 0; i <= AvFILLp (defav); ++i)
2301 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2302
2303 av_push (av, data_sv);
2304
2305 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2306
2307 api_ready (self);
2308}
2309
2310void
2311_set_state (SV *state)
1234 PROTOTYPE: $ 2312 PROTOTYPE: $
2313 PPCODE:
2314{
2315 AV *av = (AV *)SvRV (state);
2316 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2317 int i;
2318
2319 errno = data->errorno;
2320 PL_laststype = data->laststype;
2321 PL_laststatval = data->laststatval;
2322 PL_statcache = data->statcache;
2323
2324 EXTEND (SP, AvFILLp (av));
2325 for (i = 0; i < AvFILLp (av); ++i)
2326 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2327}
2328
2329
2330MODULE = Coro::State PACKAGE = Coro::AnyEvent
2331
2332BOOT:
2333 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2334
2335SV *
2336_schedule (...)
2337 PROTOTYPE: @
1235 CODE: 2338 CODE:
1236{ 2339{
1237 struct { 2340 static int incede;
1238 int errorno;
1239 int laststype;
1240 int laststatval;
1241 Stat_t statcache;
1242 } *data = (void *)data_;
1243 2341
1244 errno = data->errorno; 2342 api_cede_notself ();
1245 PL_laststype = data->laststype; 2343
1246 PL_laststatval = data->laststatval; 2344 ++incede;
1247 PL_statcache = data->statcache; 2345 while (coro_nready >= incede && api_cede ())
2346 ;
2347
2348 sv_setsv (sv_activity, &PL_sv_undef);
2349 if (coro_nready >= incede)
2350 {
2351 PUSHMARK (SP);
2352 PUTBACK;
2353 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2354 SPAGAIN;
2355 }
2356
2357 --incede;
1248} 2358}
2359
2360
2361MODULE = Coro::State PACKAGE = PerlIO::cede
2362
2363BOOT:
2364 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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