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Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.139 by root, Sun Jan 14 21:13:41 2007 UTC

1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c" 1#include "libcoro/coro.c"
4 2
5#include "EXTERN.h" 3#include "EXTERN.h"
6#include "perl.h" 4#include "perl.h"
7#include "XSUB.h" 5#include "XSUB.h"
8 6
9#include "patchlevel.h" 7#include "patchlevel.h"
10 8
11#if PERL_VERSION < 6 9#include <stdio.h>
10#include <errno.h>
11#include <assert.h>
12
13#ifdef HAVE_MMAP
14# include <unistd.h>
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif
22# endif
23# include <limits.h>
24# ifndef PAGESIZE
25# define PAGESIZE pagesize
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
27static long pagesize;
28# else
29# define BOOT_PAGESIZE (void)0
30# endif
31#else
32# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0
34#endif
35
36#if USE_VALGRIND
37# include <valgrind/valgrind.h>
38#endif
39
40/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8
42
43#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48
49#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 50# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 51# define PL_ppaddr ppaddr
14# endif 52# endif
15# ifndef call_sv 53# ifndef call_sv
16# define call_sv perl_call_sv 54# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 65# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 66# define IS_PADCONST(v) 0
29# endif 67# endif
30#endif 68#endif
31 69
32#include <errno.h> 70/* 5.8.7 */
71#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
33 74
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 76# undef STACKGUARD
36#endif 77#endif
37 78
38#ifndef STACKGUARD 79#ifndef STACKGUARD
39# define STACKGUARD 0 80# define STACKGUARD 0
40#endif 81#endif
41 82
42#ifdef HAVE_MMAP 83/* prefer perl internal functions over our own? */
43# include <unistd.h> 84#ifndef PREFER_PERL_FUNCTIONS
44# include <sys/mman.h> 85# define PREFER_PERL_FUNCTIONS 0
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif 86#endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64 87
65/* The next macro should declare a variable stacklevel that contains and approximation 88/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call 89 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */ 90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
68#define dSTACKLEVEL void *stacklevel = &stacklevel 92#define STACKLEVEL ((void *)&stacklevel)
69 93
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
71 95
72#define labs(l) ((l) >= 0 ? (l) : -(l)) 96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory")
99#else
100# define attribute(x)
101# define BARRIER
102#endif
103
104#define NOINLINE attribute ((noinline))
73 105
74#include "CoroAPI.h" 106#include "CoroAPI.h"
75 107
76#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
77static perl_mutex coro_mutex; 109static perl_mutex coro_mutex;
… …
80#else 112#else
81# define LOCK (void)0 113# define LOCK (void)0
82# define UNLOCK (void)0 114# define UNLOCK (void)0
83#endif 115#endif
84 116
117/* helper storage struct for Coro::AIO */
118struct io_state
119{
120 int errorno;
121 I32 laststype;
122 int laststatval;
123 Stat_t statcache;
124};
125
85static struct CoroAPI coroapi; 126static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 127static AV *main_mainstack; /* used to differentiate between $main and others */
87static HV *coro_state_stash; 128static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 129static SV *coro_mortal; /* will be freed after next transfer */
91 130
92/* this is actually not only the c stack but also c registers etc... */ 131static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle;
133
134/* this is a structure representing a c-level coroutine */
93typedef struct { 135typedef struct coro_cctx {
94 int refcnt; /* pointer reference counter */ 136 struct coro_cctx *next;
95 int usecnt; /* shared by how many coroutines */
96 int gencnt; /* generation counter */
97 137
98 coro_context cctx; 138 /* the stack */
99
100 void *sptr; 139 void *sptr;
101 long ssize; /* positive == mmap, otherwise malloc */ 140 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103 141
142 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env;
146 coro_context cctx;
147
148 int inuse;
149
150#if USE_VALGRIND
151 int valgrind_id;
152#endif
153} coro_cctx;
154
155enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160};
161
162/* this is a structure representing a perl-level coroutine */
104struct coro { 163struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 164 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 165 coro_cctx *cctx;
107
108 /* the optional C context */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack;
126 SV **stack_sp;
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 166
153 /* data associated with this coroutine (initial args) */ 167 /* data associated with this coroutine (initial args) */
154 AV *args; 168 AV *args;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */
172
173 /* optionally saved, might be zero */
174 AV *defav; /* @_ */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name;
181# include "state.h"
182#undef VAR
183
184 /* coro process data */
185 int prio;
155}; 186};
156 187
157typedef struct coro *Coro__State; 188typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 189typedef struct coro *Coro__State_or_hashref;
159 190
191/** Coro ********************************************************************/
192
193#define PRIO_MAX 3
194#define PRIO_HIGH 1
195#define PRIO_NORMAL 0
196#define PRIO_LOW -1
197#define PRIO_IDLE -3
198#define PRIO_MIN -4
199
200/* for Coro.pm */
201static SV *coro_current;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
203static int coro_nready;
204
205/** lowlevel stuff **********************************************************/
206
160static AV * 207static AV *
161coro_clone_padlist (pTHX_ CV *cv) 208coro_clone_padlist (CV *cv)
162{ 209{
163 AV *padlist = CvPADLIST (cv); 210 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 211 AV *newpadlist, *newpad;
165 212
166 newpadlist = newAV (); 213 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 214 AvREAL_off (newpadlist);
168#if PERL_VERSION < 9 215#if PERL_VERSION_ATLEAST (5,9,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#endif 219#endif
173 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174 --AvFILLp (padlist); 221 --AvFILLp (padlist);
175 222
176 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
178 225
179 return newpadlist; 226 return newpadlist;
180} 227}
181 228
182static void 229static void
183free_padlist (pTHX_ AV *padlist) 230free_padlist (AV *padlist)
184{ 231{
185 /* may be during global destruction */ 232 /* may be during global destruction */
186 if (SvREFCNT (padlist)) 233 if (SvREFCNT (padlist))
187 { 234 {
188 I32 i = AvFILLp (padlist); 235 I32 i = AvFILLp (padlist);
… …
209 AV *padlist; 256 AV *padlist;
210 AV *av = (AV *)mg->mg_obj; 257 AV *av = (AV *)mg->mg_obj;
211 258
212 /* casting is fun. */ 259 /* casting is fun. */
213 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214 free_padlist (aTHX_ padlist); 261 free_padlist (padlist);
215 262
216 SvREFCNT_dec (av); 263 SvREFCNT_dec (av);
217 264
218 return 0; 265 return 0;
219} 266}
220 267
221#define PERL_MAGIC_coro PERL_MAGIC_ext 268#define PERL_MAGIC_coro PERL_MAGIC_ext
222 269
223static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224 271
272#define CORO_MAGIC(cv) \
273 SvMAGIC (cv) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
275 ? SvMAGIC (cv) \
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
277 : 0
278
225/* the next two functions merely cache the padlists */ 279/* the next two functions merely cache the padlists */
226static void 280static void
227get_padlist (pTHX_ CV *cv) 281get_padlist (CV *cv)
228{ 282{
229 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 283 MAGIC *mg = CORO_MAGIC (cv);
284 AV *av;
230 285
231 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233 else 288 else
234 { 289 {
235#if 0 290#if PREFER_PERL_FUNCTIONS
236 /* this should work - but it doesn't :( */ 291 /* this is probably cleaner, but also slower? */
237 CV *cp = Perl_cv_clone (aTHX_ cv); 292 CV *cp = Perl_cv_clone (cv);
238 CvPADLIST (cv) = CvPADLIST (cp); 293 CvPADLIST (cv) = CvPADLIST (cp);
239 CvPADLIST (cp) = 0; 294 CvPADLIST (cp) = 0;
240 SvREFCNT_dec (cp); 295 SvREFCNT_dec (cp);
241#else 296#else
242 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 297 CvPADLIST (cv) = coro_clone_padlist (cv);
243#endif 298#endif
244 } 299 }
245} 300}
246 301
247static void 302static void
248put_padlist (pTHX_ CV *cv) 303put_padlist (CV *cv)
249{ 304{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 305 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av;
251 307
252 if (!mg) 308 if (!mg)
253 { 309 {
254 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256 mg->mg_virtual = &vtbl_coro; 312 mg->mg_virtual = &vtbl_coro;
257 mg->mg_obj = (SV *)newAV (); 313 mg->mg_obj = (SV *)newAV ();
258 } 314 }
259 315
260 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 316 av = (AV *)mg->mg_obj;
317
318 if (AvFILLp (av) >= AvMAX (av))
319 av_extend (av, AvMAX (av) + 1);
320
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261} 322}
323
324/** load & save, init *******************************************************/
262 325
263#define SB do { 326#define SB do {
264#define SE } while (0) 327#define SE } while (0)
265 328
266#define LOAD(state) load_state(aTHX_ (state));
267#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
268
269#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
270 330
271static void 331static void
272load_state(pTHX_ Coro__State c) 332load_perl (Coro__State c)
273{ 333{
274 PL_dowarn = c->dowarn; 334#define VAR(name,type) PL_ ## name = c->name;
275 PL_in_eval = c->in_eval; 335# include "state.h"
276 336#undef VAR
277 PL_curstackinfo = c->curstackinfo;
278 PL_curstack = c->curstack;
279 PL_mainstack = c->mainstack;
280 PL_stack_sp = c->stack_sp;
281 PL_op = c->op;
282 PL_curpad = c->curpad;
283 PL_comppad = c->comppad;
284 PL_compcv = c->compcv;
285 PL_stack_base = c->stack_base;
286 PL_stack_max = c->stack_max;
287 PL_tmps_stack = c->tmps_stack;
288 PL_tmps_floor = c->tmps_floor;
289 PL_tmps_ix = c->tmps_ix;
290 PL_tmps_max = c->tmps_max;
291 PL_markstack = c->markstack;
292 PL_markstack_ptr = c->markstack_ptr;
293 PL_markstack_max = c->markstack_max;
294 PL_scopestack = c->scopestack;
295 PL_scopestack_ix = c->scopestack_ix;
296 PL_scopestack_max = c->scopestack_max;
297 PL_savestack = c->savestack;
298 PL_savestack_ix = c->savestack_ix;
299 PL_savestack_max = c->savestack_max;
300#if PERL_VERSION < 9
301 PL_retstack = c->retstack;
302 PL_retstack_ix = c->retstack_ix;
303 PL_retstack_max = c->retstack_max;
304#endif
305 PL_curpm = c->curpm;
306 PL_curcop = c->curcop;
307 PL_top_env = c->top_env;
308 337
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
312 352
313 { 353 {
314 dSP; 354 dSP;
315 CV *cv; 355 CV *cv;
316 356
317 /* now do the ugly restore mess */ 357 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 358 while ((cv = (CV *)POPs))
319 { 359 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 360 put_padlist (cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 361 CvDEPTH (cv) = PTR2IV (POPs);
326 } 362 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 363 }
330 364
331 PUTBACK; 365 PUTBACK;
332 } 366 }
333} 367}
334 368
335static void 369static void
336save_state(pTHX_ Coro__State c, int flags) 370save_perl (Coro__State c)
337{ 371{
338 { 372 {
339 dSP; 373 dSP;
340 I32 cxix = cxstack_ix; 374 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 375 PERL_CONTEXT *ccstk = cxstack;
… …
344 /* 378 /*
345 * the worst thing you can imagine happens first - we have to save 379 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 380 * (and reinitialize) all cv's in the whole callchain :(
347 */ 381 */
348 382
383 EXTEND (SP, 3 + 1);
349 PUSHs (Nullsv); 384 PUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 385 /* this loop was inspired by pp_caller */
351 for (;;) 386 for (;;)
352 { 387 {
353 while (cxix >= 0) 388 while (cxix >= 0)
354 { 389 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 390 PERL_CONTEXT *cx = &ccstk[cxix--];
356 391
357 if (CxTYPE(cx) == CXt_SUB) 392 if (CxTYPE (cx) == CXt_SUB)
358 { 393 {
359 CV *cv = cx->blk_sub.cv; 394 CV *cv = cx->blk_sub.cv;
395
360 if (CvDEPTH(cv)) 396 if (CvDEPTH (cv))
361 { 397 {
362 EXTEND (SP, CvDEPTH(cv)*2); 398 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 399 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 401 PUSHs ((SV *)cv);
373 402
403 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 404 get_padlist (cv);
375 } 405 }
376 } 406 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 407 }
386 408
387 if (top_si->si_type == PERLSI_MAIN) 409 if (top_si->si_type == PERLSI_MAIN)
388 break; 410 break;
389 411
… …
393 } 415 }
394 416
395 PUTBACK; 417 PUTBACK;
396 } 418 }
397 419
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401 424
402 c->dowarn = PL_dowarn; 425#define VAR(name,type)c->name = PL_ ## name;
403 c->in_eval = PL_in_eval; 426# include "state.h"
404 427#undef VAR
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp;
409 c->op = PL_op;
410 c->curpad = PL_curpad;
411 c->comppad = PL_comppad;
412 c->compcv = PL_compcv;
413 c->stack_base = PL_stack_base;
414 c->stack_max = PL_stack_max;
415 c->tmps_stack = PL_tmps_stack;
416 c->tmps_floor = PL_tmps_floor;
417 c->tmps_ix = PL_tmps_ix;
418 c->tmps_max = PL_tmps_max;
419 c->markstack = PL_markstack;
420 c->markstack_ptr = PL_markstack_ptr;
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435 c->top_env = PL_top_env;
436} 428}
437 429
438/* 430/*
439 * allocate various perl stacks. This is an exact copy 431 * allocate various perl stacks. This is an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 432 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 433 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 434 * not usually need a lot of stackspace.
443 */ 435 */
436#if PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks
438#else
444static void 439static void
445coro_init_stacks (pTHX) 440coro_init_stacks ()
446{ 441{
447 LOCK;
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450 PL_curstackinfo->si_type = PERLSI_MAIN; 443 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 444 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 446
454 PL_stack_base = AvARRAY(PL_curstack); 447 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 448 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 450
458 New(50,PL_tmps_stack,96,SV*); 451 New(50,PL_tmps_stack,128,SV*);
459 PL_tmps_floor = -1; 452 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 453 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 454 PL_tmps_max = 128;
462 455
463 New(54,PL_markstack,16,I32); 456 New(54,PL_markstack,32,I32);
464 PL_markstack_ptr = PL_markstack; 457 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 458 PL_markstack_max = PL_markstack + 32;
466 459
467#ifdef SET_MARK_OFFSET 460#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 461 SET_MARK_OFFSET;
469#endif 462#endif
470 463
471 New(54,PL_scopestack,16,I32); 464 New(54,PL_scopestack,32,I32);
472 PL_scopestack_ix = 0; 465 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 466 PL_scopestack_max = 32;
474 467
475 New(54,PL_savestack,96,ANY); 468 New(54,PL_savestack,64,ANY);
476 PL_savestack_ix = 0; 469 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 470 PL_savestack_max = 64;
478 471
479#if PERL_VERSION < 9 472#if !PERL_VERSION_ATLEAST (5,9,0)
480 New(54,PL_retstack,8,OP*); 473 New(54,PL_retstack,16,OP*);
481 PL_retstack_ix = 0; 474 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 475 PL_retstack_max = 16;
483#endif 476#endif
484
485 UNLOCK;
486} 477}
478#endif
487 479
488/* 480/*
489 * destroy the stacks, the callchain etc... 481 * destroy the stacks, the callchain etc...
490 */ 482 */
491static void 483static void
492destroy_stacks(pTHX) 484coro_destroy_stacks ()
493{ 485{
494 if (!IN_DESTRUCT) 486 if (!IN_DESTRUCT)
495 { 487 {
496 /* is this ugly, I ask? */ 488 /* restore all saved variables and stuff */
497 LEAVE_SCOPE (0); 489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
498 491
499 /* sure it is, but more important: is it correct?? :/ */ 492 /* free all temporaries */
500 FREETMPS; 493 FREETMPS;
494 assert (PL_tmps_ix == -1);
501 495
496 /* unwind all extra stacks */
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
503 } 501 }
504 502
505 while (PL_curstackinfo->si_next) 503 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 504 PL_curstackinfo = PL_curstackinfo->si_next;
507 505
508 while (PL_curstackinfo) 506 while (PL_curstackinfo)
509 { 507 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 508 PERL_SI *p = PL_curstackinfo->si_prev;
511 509
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 510 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 511 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 512
524 Safefree (PL_curstackinfo->si_cxstack); 513 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 514 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 515 PL_curstackinfo = p;
527 } 516 }
528 517
529 Safefree (PL_tmps_stack); 518 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 519 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 520 Safefree (PL_scopestack);
532 Safefree (PL_savestack); 521 Safefree (PL_savestack);
533#if PERL_VERSION < 9 522#if !PERL_VERSION_ATLEAST (5,9,0)
534 Safefree (PL_retstack); 523 Safefree (PL_retstack);
535#endif 524#endif
536} 525}
537 526
538static void 527/** coroutine stack handling ************************************************/
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542 528
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548
549 if (alloc)
550 {
551#if HAVE_MMAP
552 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554 if (stack->sptr != (void *)-1)
555 {
556# if STACKGUARD
557 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558# endif
559 }
560 else
561#endif
562 {
563 stack->ssize = - (STACKSIZE * (long)sizeof (long));
564 New (0, stack->sptr, STACKSIZE, long);
565 }
566 }
567 else
568 stack->sptr = 0;
569
570 ctx->stack = stack;
571}
572
573static void 529static void
574deallocate_stack (Coro__State ctx) 530setup_coro (struct coro *coro)
575{
576 coro_stack *stack = ctx->stack;
577
578 ctx->stack = 0;
579
580 if (stack)
581 {
582 if (!--stack->refcnt)
583 {
584#ifdef HAVE_MMAP
585 if (stack->ssize > 0 && stack->sptr)
586 munmap (stack->sptr, stack->ssize);
587 else
588#endif
589 Safefree (stack->sptr);
590
591 Safefree (stack);
592 }
593 else if (ctx->gencnt == stack->gencnt)
594 --stack->usecnt;
595 }
596}
597
598static void
599setup_coro (void *arg)
600{ 531{
601 /* 532 /*
602 * emulate part of the perl startup here. 533 * emulate part of the perl startup here.
603 */ 534 */
604 dTHX; 535
536 coro_init_stacks ();
537
538 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL;
540 PL_curpm = 0;
541 PL_localizing = 0;
542 PL_dirty = 0;
543 PL_restartop = 0;
544
545 {
546 dSP;
547 LOGOP myop;
548
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP);
553 myop.op_next = Nullop;
554 myop.op_flags = OPf_WANT_VOID;
555
556 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
558 PUTBACK;
559 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN;
562 }
563
564 ENTER; /* necessary e.g. for dounwind */
565}
566
567static void
568free_coro_mortal ()
569{
570 if (coro_mortal)
571 {
572 SvREFCNT_dec (coro_mortal);
573 coro_mortal = 0;
574 }
575}
576
577/* inject a fake call to Coro::State::_cctx_init into the execution */
578static void NOINLINE
579prepare_cctx (coro_cctx *cctx)
580{
605 dSP; 581 dSP;
606 Coro__State ctx = (Coro__State)arg; 582 LOGOP myop;
607 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608 583
609 coro_init_stacks (aTHX); 584 Zero (&myop, 1, LOGOP);
610 /*PL_curcop = 0;*/ 585 myop.op_next = PL_op;
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
612 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614 587
588 PUSHMARK (SP);
589 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK;
593 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 595 SPAGAIN;
616
617 if (ctx->stack)
618 {
619 ctx->cursp = 0;
620
621 PUSHMARK(SP);
622 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625 if (SvTRUE (ERRSV))
626 croak (NULL);
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 }
630 else
631 {
632 UNOP myop;
633
634 Zero(&myop, 1, UNOP);
635 myop.op_next = Nullop;
636 myop.op_flags = OPf_WANT_VOID;
637
638 PL_op = (OP *)&myop;
639
640 PUSHMARK(SP);
641 XPUSHs (sub_init);
642 /*
643 * the next line is slightly wrong, as PL_op->op_next
644 * is actually being executed so we skip the first op.
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651 SPAGAIN;
652
653 ENTER; /* necessary e.g. for dounwind */
654 }
655} 596}
656 597
657static void 598static void
658continue_coro (void *arg) 599coro_run (void *arg)
659{ 600{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK;
603
660 /* 604 /*
661 * this is a _very_ stripped down perl interpreter ;) 605 * this is a _very_ stripped down perl interpreter ;)
662 */ 606 */
663 dTHX;
664 Coro__State ctx = (Coro__State)arg;
665
666 PL_top_env = &ctx->start_env; 607 PL_top_env = &PL_start_env;
667 608
668 ctx->cursp = 0; 609 /* inject call to cctx_init */
669 PL_op = PL_op->op_next; 610 prepare_cctx ((coro_cctx *)arg);
670 CALLRUNOPS(aTHX);
671 611
612 /* somebody will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op;
614 perl_run (PL_curinterp);
615
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
672 abort (); 617 abort ();
673} 618}
674 619
620static coro_cctx *
621cctx_new ()
622{
623 coro_cctx *cctx;
624
625 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx);
628
629#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634
635 if (cctx->sptr == (void *)-1)
636 {
637 perror ("FATAL: unable to mmap stack for coroutine");
638 _exit (EXIT_FAILURE);
639 }
640
641# if STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
643# endif
644
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 {
652 perror ("FATAL: unable to malloc stack for coroutine");
653 _exit (EXIT_FAILURE);
654 }
655
656#endif
657
658#if USE_VALGRIND
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666
667 return cctx;
668}
669
675static void 670static void
671cctx_destroy (coro_cctx *cctx)
672{
673 if (!cctx)
674 return;
675
676 --cctx_count;
677
678#if USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif
681
682#if HAVE_MMAP
683 munmap (cctx->sptr, cctx->ssize);
684#else
685 Safefree (cctx->sptr);
686#endif
687
688 Safefree (cctx);
689}
690
691static coro_cctx *
692cctx_get ()
693{
694 coro_cctx *cctx;
695
696 if (cctx_first)
697 {
698 cctx = cctx_first;
699 cctx_first = cctx->next;
700 --cctx_idle;
701 }
702 else
703 {
704 cctx = cctx_new ();
705 PL_op = PL_op->op_next;
706 }
707
708 return cctx;
709}
710
711static void
712cctx_put (coro_cctx *cctx)
713{
714 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX)
716 {
717 coro_cctx *first = cctx_first;
718 cctx_first = first->next;
719 --cctx_idle;
720
721 assert (!first->inuse);
722 cctx_destroy (first);
723 }
724
725 ++cctx_idle;
726 cctx->next = cctx_first;
727 cctx_first = cctx;
728}
729
730/** coroutine switching *****************************************************/
731
732/* never call directly, always through the coro_state_transfer global variable */
733static void NOINLINE
676transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 734transfer (struct coro *prev, struct coro *next)
677{ 735{
678 dSTACKLEVEL; 736 dSTACKLEVEL;
679 737
738 /* sometimes transfer is only called to set idle_sp */
739 if (!next)
740 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 }
680 if (prev != next) 744 else if (prev != next)
681 { 745 {
682 if (next->mainstack) 746 coro_cctx *prev__cctx;
747
748 if (prev->flags & CF_NEW)
683 { 749 {
684 LOCK; 750 /* create a new empty context */
685 SAVE (prev, flags); 751 Newz (0, prev->cctx, 1, coro_cctx);
686 LOAD (next); 752 prev->cctx->inuse = 1;
687 UNLOCK; 753 prev->flags &= ~CF_NEW;
688 754 prev->flags |= CF_RUNNING;
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 {
696 if (!prev->stack)
697 allocate_stack (prev, 0);
698 else if (prev->cursp != stacklevel
699 && prev->stack->usecnt > 1)
700 {
701 prev->gencnt = ++prev->stack->gencnt;
702 prev->stack->usecnt = 1;
703 }
704
705 /* has our stack been invalidated? */
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 {
708 deallocate_stack (next);
709 allocate_stack (next, 1);
710 coro_create (&(next->stack->cctx),
711 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize));
713 }
714
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 } 755 }
722 else if (next->tmps_ix == -2) 756
723 croak ("tried to transfer to running coroutine"); 757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING;
769
770 LOCK;
771
772 if (next->flags & CF_NEW)
773 {
774 /* need to start coroutine */
775 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */
779 setup_coro (next);
780 /* need a new stack */
781 assert (!next->cctx);
782 }
724 else 783 else
725 { 784 {
726 LOCK; 785 /* coroutine already started */
727 SAVE (prev, -1); /* first get rid of the old state */ 786 save_perl (prev);
728 UNLOCK; 787 load_perl (next);
729
730 if (flags & TRANSFER_SAVE_CCTXT)
731 {
732 if (!prev->stack)
733 allocate_stack (prev, 0);
734
735 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736 {
737 PL_top_env = &next->start_env;
738
739 setup_coro (next);
740 next->cursp = stacklevel;
741
742 prev->stack->refcnt++;
743 prev->stack->usecnt++;
744 next->stack = prev->stack;
745 next->gencnt = prev->gencnt;
746 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 }
759 else
760 {
761 setup_coro (next);
762 next->cursp = stacklevel;
763 }
764 } 788 }
765 }
766 789
767 LOCK; 790 prev__cctx = prev->cctx;
768 if (coro_mortal) 791
769 { 792 /* possibly "free" the cctx */
770 SvREFCNT_dec (coro_mortal); 793 if (prev__cctx->idle_sp == STACKLEVEL)
794 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 }
803
804 if (!next->cctx)
805 {
806 next->cctx = cctx_get ();
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810
811 if (prev__cctx != next->cctx)
812 {
813 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 }
817
771 coro_mortal = 0; 818 free_coro_mortal ();
772 }
773 UNLOCK; 819 UNLOCK;
820 }
774} 821}
775 822
776#define SV_CORO(sv,func) \ 823struct transfer_args
777 do { \ 824{
778 if (SvROK (sv)) \ 825 struct coro *prev, *next;
779 sv = SvRV (sv); \ 826};
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796 827
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 828#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
798 829
830/** high level stuff ********************************************************/
831
799static void 832static int
833coro_state_destroy (struct coro *coro)
834{
835 if (coro->flags & CF_DESTROYED)
836 return 0;
837
838 coro->flags |= CF_DESTROYED;
839
840 if (coro->flags & CF_READY)
841 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove the coro */
844 LOCK;
845 --coro_nready;
846 UNLOCK;
847 }
848 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850
851 if (coro->mainstack && coro->mainstack != main_mainstack)
852 {
853 assert (!(coro->flags & CF_RUNNING));
854
855 struct coro temp;
856 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL;
858
859 if (coro->flags & CF_RUNNING)
860 croak ("FATAL: tried to destroy currently running coroutine");
861
862 save_perl (&temp);
863 load_perl (coro);
864
865 coro_destroy_stacks ();
866
867 load_perl (&temp); /* this will get rid of defsv etc.. */
868
869 coro->mainstack = 0;
870 }
871
872 cctx_destroy (coro->cctx);
873 SvREFCNT_dec (coro->args);
874
875 return 1;
876}
877
878static int
879coro_state_free (pTHX_ SV *sv, MAGIC *mg)
880{
881 struct coro *coro = (struct coro *)mg->mg_ptr;
882 mg->mg_ptr = 0;
883
884 if (--coro->refcnt < 0)
885 {
886 coro_state_destroy (coro);
887 Safefree (coro);
888 }
889
890 return 0;
891}
892
893static int
894coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
895{
896 struct coro *coro = (struct coro *)mg->mg_ptr;
897
898 ++coro->refcnt;
899
900 return 0;
901}
902
903static MGVTBL coro_state_vtbl = {
904 0, 0, 0, 0,
905 coro_state_free,
906 0,
907#ifdef MGf_DUP
908 coro_state_dup,
909#else
910# define MGf_DUP 0
911#endif
912};
913
914static struct coro *
915SvSTATE (SV *coro)
916{
917 HV *stash;
918 MAGIC *mg;
919
920 if (SvROK (coro))
921 coro = SvRV (coro);
922
923 stash = SvSTASH (coro);
924 if (stash != coro_stash && stash != coro_state_stash)
925 {
926 /* very slow, but rare, check */
927 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928 croak ("Coro::State object required");
929 }
930
931 mg = SvMAGIC (coro);
932 assert (mg->mg_type == PERL_MAGIC_ext);
933 return (struct coro *)mg->mg_ptr;
934}
935
936static void
937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
938{
939 ta->prev = SvSTATE (prev_sv);
940 ta->next = SvSTATE (next_sv);
941}
942
943static void
800api_transfer(pTHX_ SV *prev, SV *next, int flags) 944api_transfer (SV *prev_sv, SV *next_sv)
801{ 945{
802 SV_CORO (prev, "Coro::transfer"); 946 struct transfer_args ta;
803 SV_CORO (next, "Coro::transfer");
804 947
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 948 prepare_transfer (&ta, prev_sv, next_sv);
949 TRANSFER (ta);
950}
951
952static int
953api_save (SV *coro_sv, int new_save)
954{
955 struct coro *coro = SvSTATE (coro_sv);
956 int old_save = coro->save;
957
958 if (new_save >= 0)
959 coro->save = new_save;
960
961 return old_save;
806} 962}
807 963
808/** Coro ********************************************************************/ 964/** Coro ********************************************************************/
809 965
810#define PRIO_MAX 3
811#define PRIO_HIGH 1
812#define PRIO_NORMAL 0
813#define PRIO_LOW -1
814#define PRIO_IDLE -3
815#define PRIO_MIN -4
816
817/* for Coro.pm */
818static GV *coro_current, *coro_idle;
819static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820static int coro_nready;
821
822static void 966static void
823coro_enq (pTHX_ SV *sv) 967coro_enq (SV *coro_sv)
824{ 968{
825 SV **xprio;
826 int prio;
827
828 if (SvTYPE (sv) != SVt_PVHV)
829 croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834 prio = prio > PRIO_MAX ? PRIO_MAX
835 : prio < PRIO_MIN ? PRIO_MIN
836 : prio;
837
838 av_push (coro_ready [prio - PRIO_MIN], sv); 969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839 coro_nready++;
840} 970}
841 971
842static SV * 972static SV *
843coro_deq (pTHX_ int min_prio) 973coro_deq (int min_prio)
844{ 974{
845 int prio = PRIO_MAX - PRIO_MIN; 975 int prio = PRIO_MAX - PRIO_MIN;
846 976
847 min_prio -= PRIO_MIN; 977 min_prio -= PRIO_MIN;
848 if (min_prio < 0) 978 if (min_prio < 0)
849 min_prio = 0; 979 min_prio = 0;
850 980
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 981 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852 if (av_len (coro_ready[prio]) >= 0) 982 if (AvFILLp (coro_ready [prio]) >= 0)
853 {
854 coro_nready--;
855 return av_shift (coro_ready[prio]); 983 return av_shift (coro_ready [prio]);
856 }
857 984
858 return 0; 985 return 0;
859} 986}
860 987
861static void 988static int
862api_ready (SV *coro) 989api_ready (SV *coro_sv)
863{ 990{
864 dTHX; 991 struct coro *coro;
865 992
866 if (SvROK (coro)) 993 if (SvROK (coro_sv))
867 coro = SvRV (coro); 994 coro_sv = SvRV (coro_sv);
995
996 coro = SvSTATE (coro_sv);
997
998 if (coro->flags & CF_READY)
999 return 0;
1000
1001 coro->flags |= CF_READY;
868 1002
869 LOCK; 1003 LOCK;
870 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1004 coro_enq (SvREFCNT_inc (coro_sv));
1005 ++coro_nready;
871 UNLOCK; 1006 UNLOCK;
1007
1008 return 1;
1009}
1010
1011static int
1012api_is_ready (SV *coro_sv)
1013{
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015}
1016
1017static void
1018prepare_schedule (struct transfer_args *ta)
1019{
1020 SV *prev_sv, *next_sv;
1021
1022 for (;;)
1023 {
1024 LOCK;
1025 next_sv = coro_deq (PRIO_MIN);
1026
1027 /* nothing to schedule: call the idle handler */
1028 if (!next_sv)
1029 {
1030 UNLOCK;
1031 dSP;
1032
1033 ENTER;
1034 SAVETMPS;
1035
1036 PUSHMARK (SP);
1037 PUTBACK;
1038 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1039
1040 FREETMPS;
1041 LEAVE;
1042 continue;
1043 }
1044
1045 ta->next = SvSTATE (next_sv);
1046
1047 /* cannot transfer to destroyed coros, skip and look for next */
1048 if (ta->next->flags & CF_DESTROYED)
1049 {
1050 UNLOCK;
1051 SvREFCNT_dec (next_sv);
1052 /* coro_nready is already taken care of by destroy */
1053 continue;
1054 }
1055
1056 --coro_nready;
1057 UNLOCK;
1058 break;
1059 }
1060
1061 /* free this only after the transfer */
1062 prev_sv = SvRV (coro_current);
1063 SvRV_set (coro_current, next_sv);
1064 ta->prev = SvSTATE (prev_sv);
1065
1066 assert (ta->next->flags & CF_READY);
1067 ta->next->flags &= ~CF_READY;
1068
1069 LOCK;
1070 free_coro_mortal ();
1071 coro_mortal = prev_sv;
1072 UNLOCK;
1073}
1074
1075static void
1076prepare_cede (struct transfer_args *ta)
1077{
1078 api_ready (coro_current);
1079 prepare_schedule (ta);
1080}
1081
1082static int
1083prepare_cede_notself (struct transfer_args *ta)
1084{
1085 if (coro_nready)
1086 {
1087 SV *prev = SvRV (coro_current);
1088 prepare_schedule (ta);
1089 api_ready (prev);
1090 return 1;
1091 }
1092 else
1093 return 0;
872} 1094}
873 1095
874static void 1096static void
875api_schedule (void) 1097api_schedule (void)
876{ 1098{
877 dTHX; 1099 struct transfer_args ta;
878 1100
879 SV *prev, *next; 1101 prepare_schedule (&ta);
880 1102 TRANSFER (ta);
881 LOCK;
882
883 prev = SvRV (GvSV (coro_current));
884 next = coro_deq (aTHX_ PRIO_MIN);
885
886 if (!next)
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889 /* free this only after the transfer */
890 coro_mortal = prev;
891 SV_CORO (prev, "Coro::schedule");
892
893 SvRV (GvSV (coro_current)) = next;
894
895 SV_CORO (next, "Coro::schedule");
896
897 UNLOCK;
898
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901} 1103}
902 1104
903static void 1105static int
904api_cede (void) 1106api_cede (void)
905{ 1107{
906 dTHX; 1108 struct transfer_args ta;
907 1109
908 LOCK; 1110 prepare_cede (&ta);
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910 UNLOCK;
911 1111
912 api_schedule (); 1112 if (ta.prev != ta.next)
1113 {
1114 TRANSFER (ta);
1115 return 1;
1116 }
1117 else
1118 return 0;
1119}
1120
1121static int
1122api_cede_notself (void)
1123{
1124 struct transfer_args ta;
1125
1126 if (prepare_cede_notself (&ta))
1127 {
1128 TRANSFER (ta);
1129 return 1;
1130 }
1131 else
1132 return 0;
913} 1133}
914 1134
915MODULE = Coro::State PACKAGE = Coro::State 1135MODULE = Coro::State PACKAGE = Coro::State
916 1136
917PROTOTYPES: ENABLE 1137PROTOTYPES: DISABLE
918 1138
919BOOT: 1139BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 1140{
921#ifdef USE_ITHREADS 1141#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 1142 MUTEX_INIT (&coro_mutex);
923#endif 1143#endif
924 BOOT_PAGESIZE; 1144 BOOT_PAGESIZE;
925 1145
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1146 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 1147
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1150 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934 1153
935 main_mainstack = PL_mainstack; 1154 main_mainstack = PL_mainstack;
936 1155
937 coroapi.ver = CORO_API_VERSION; 1156 coroapi.ver = CORO_API_VERSION;
938 coroapi.transfer = api_transfer; 1157 coroapi.transfer = api_transfer;
939}
940 1158
941Coro::State 1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942_newprocess(args) 1160}
943 SV * args 1161
944 PROTOTYPE: $ 1162SV *
1163new (char *klass, ...)
945 CODE: 1164 CODE:
946 Coro__State coro; 1165{
1166 struct coro *coro;
1167 HV *hv;
1168 int i;
947 1169
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949 croak ("Coro::State::_newprocess expects an arrayref");
950
951 Newz (0, coro, 1, struct coro); 1170 Newz (0, coro, 1, struct coro);
1171 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL;
1173 coro->flags = CF_NEW;
952 1174
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1175 hv = newHV ();
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1176 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955 /*coro->stack = 0;*/ 1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956 1178
957 /* same as JMPENV_BOOTSTRAP */ 1179 for (i = 1; i < items; i++)
958 /* we might be able to recycle start_env, but safe is safe */ 1180 av_push (coro->args, newSVsv (ST (i)));
959 /*Zero (&coro->start_env, 1, JMPENV);*/ 1181}
960 coro->start_env.je_ret = -1;
961 coro->start_env.je_mustcatch = TRUE;
962
963 RETVAL = coro;
964 OUTPUT: 1182 OUTPUT:
965 RETVAL 1183 RETVAL
966 1184
1185int
1186save (SV *coro, int new_save = -1)
1187 CODE:
1188 RETVAL = api_save (coro, new_save);
1189 OUTPUT:
1190 RETVAL
1191
967void 1192void
968transfer(prev, next, flags) 1193_set_stacklevel (...)
969 SV *prev 1194 ALIAS:
970 SV *next 1195 Coro::State::transfer = 1
971 int flags 1196 Coro::schedule = 2
972 PROTOTYPE: @ 1197 Coro::cede = 3
1198 Coro::cede_notself = 4
973 CODE: 1199 CODE:
974 PUTBACK; 1200{
975 SV_CORO (next, "Coro::transfer"); 1201 struct transfer_args ta;
976 SV_CORO (prev, "Coro::transfer"); 1202
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1203 switch (ix)
978 SPAGAIN; 1204 {
1205 case 0:
1206 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1207 ta.next = 0;
1208 break;
1209
1210 case 1:
1211 if (items != 2)
1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213
1214 prepare_transfer (&ta, ST (0), ST (1));
1215 break;
1216
1217 case 2:
1218 prepare_schedule (&ta);
1219 break;
1220
1221 case 3:
1222 prepare_cede (&ta);
1223 break;
1224
1225 case 4:
1226 if (!prepare_cede_notself (&ta))
1227 XSRETURN_EMPTY;
1228
1229 break;
1230 }
1231
1232 BARRIER;
1233 TRANSFER (ta);
1234
1235 if (GIMME_V != G_VOID && ta.next != ta.prev)
1236 XSRETURN_YES;
1237}
1238
1239bool
1240_destroy (SV *coro_sv)
1241 CODE:
1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1243 OUTPUT:
1244 RETVAL
979 1245
980void 1246void
981DESTROY(coro)
982 Coro::State coro
983 CODE:
984
985 if (coro->mainstack && coro->mainstack != main_mainstack)
986 {
987 struct coro temp;
988
989 PUTBACK;
990 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991 LOAD (aTHX_ coro);
992 SPAGAIN;
993
994 destroy_stacks (aTHX);
995
996 LOAD ((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
998
999 coro->mainstack = 0;
1000 }
1001
1002 deallocate_stack (coro);
1003 SvREFCNT_dec (coro->args);
1004 Safefree (coro);
1005
1006void
1007_exit(code) 1247_exit (code)
1008 int code 1248 int code
1009 PROTOTYPE: $ 1249 PROTOTYPE: $
1010 CODE: 1250 CODE:
1011 _exit (code); 1251 _exit (code);
1012 1252
1013MODULE = Coro::State PACKAGE = Coro::Cont 1253int
1254cctx_count ()
1255 CODE:
1256 RETVAL = cctx_count;
1257 OUTPUT:
1258 RETVAL
1014 1259
1015# this is slightly dirty (should expose a c-level api) 1260int
1016 1261cctx_idle ()
1017void 1262 CODE:
1018yield(...) 1263 RETVAL = cctx_idle;
1019 PROTOTYPE: @ 1264 OUTPUT:
1020 CODE: 1265 RETVAL
1021 SV *yieldstack;
1022 SV *sv;
1023 AV *defav = GvAV (PL_defgv);
1024 struct coro *prev, *next;
1025
1026 yieldstack = *hv_fetch (
1027 (HV *)SvRV (GvSV (coro_current)),
1028 "yieldstack", sizeof ("yieldstack") - 1,
1029 0
1030 );
1031
1032 /* set up @_ -- ugly */
1033 av_clear (defav);
1034 av_fill (defav, items - 1);
1035 while (items--)
1036 av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038 sv = av_pop ((AV *)SvRV (yieldstack));
1039 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041 SvREFCNT_dec (sv);
1042
1043 transfer (aTHX_ prev, next, 0);
1044 1266
1045MODULE = Coro::State PACKAGE = Coro 1267MODULE = Coro::State PACKAGE = Coro
1046 1268
1047# this is slightly dirty (should expose a c-level api)
1048
1049BOOT: 1269BOOT:
1050{ 1270{
1051 int i; 1271 int i;
1272
1052 HV *stash = gv_stashpv ("Coro", TRUE); 1273 coro_stash = gv_stashpv ("Coro", TRUE);
1053 1274
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1275 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1276 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1277 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1278 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1279 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1280 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060 1281
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1282 coro_current = get_sv ("Coro::current", FALSE);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1283 SvREADONLY_on (coro_current);
1063 1284
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1285 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV (); 1286 coro_ready[i] = newAV ();
1066 1287
1067 { 1288 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 1289 SV *sv = perl_get_sv("Coro::API", 1);
1069 1290
1070 coroapi.schedule = api_schedule; 1291 coroapi.schedule = api_schedule;
1292 coroapi.save = api_save;
1071 coroapi.cede = api_cede; 1293 coroapi.cede = api_cede;
1294 coroapi.cede_notself = api_cede_notself;
1072 coroapi.ready = api_ready; 1295 coroapi.ready = api_ready;
1296 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 1297 coroapi.nready = &coro_nready;
1074 coroapi.current = coro_current; 1298 coroapi.current = coro_current;
1075 1299
1076 GCoroAPI = &coroapi; 1300 GCoroAPI = &coroapi;
1077 sv_setiv(sv, (IV)&coroapi); 1301 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on(sv); 1302 SvREADONLY_on (sv);
1079 } 1303 }
1080} 1304}
1081 1305
1082#if !PERL_MICRO
1083
1084void 1306void
1085ready(self) 1307_set_current (SV *current)
1086 SV * self
1087 PROTOTYPE: $ 1308 PROTOTYPE: $
1088 CODE: 1309 CODE:
1089 api_ready (self); 1310 SvREFCNT_dec (SvRV (coro_current));
1090 1311 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091#endif
1092 1312
1093int 1313int
1314prio (Coro::State coro, int newprio = 0)
1315 ALIAS:
1316 nice = 1
1317 CODE:
1318{
1319 RETVAL = coro->prio;
1320
1321 if (items > 1)
1322 {
1323 if (ix)
1324 newprio = coro->prio - newprio;
1325
1326 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1327 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1328
1329 coro->prio = newprio;
1330 }
1331}
1332 OUTPUT:
1333 RETVAL
1334
1335SV *
1336ready (SV *self)
1337 PROTOTYPE: $
1338 CODE:
1339 RETVAL = boolSV (api_ready (self));
1340 OUTPUT:
1341 RETVAL
1342
1343SV *
1344is_ready (SV *self)
1345 PROTOTYPE: $
1346 CODE:
1347 RETVAL = boolSV (api_is_ready (self));
1348 OUTPUT:
1349 RETVAL
1350
1351int
1094nready(...) 1352nready (...)
1095 PROTOTYPE: 1353 PROTOTYPE:
1096 CODE: 1354 CODE:
1097 RETVAL = coro_nready; 1355 RETVAL = coro_nready;
1098 OUTPUT: 1356 OUTPUT:
1099 RETVAL 1357 RETVAL
1100 1358
1101void 1359MODULE = Coro::State PACKAGE = Coro::AIO
1102schedule(...) 1360
1103 PROTOTYPE: 1361SV *
1362_get_state ()
1104 CODE: 1363 CODE:
1105 api_schedule ();
1106
1107void
1108cede(...)
1109 PROTOTYPE:
1110 CODE:
1111 api_cede ();
1112
1113# and these are hacks
1114SV *
1115_aio_get_state ()
1116 CODE:
1117{ 1364{
1118 struct { 1365 struct io_state *data;
1119 int errorno;
1120 int laststype;
1121 int laststatval;
1122 Stat_t statcache;
1123 } data;
1124 1366
1367 RETVAL = newSV (sizeof (struct io_state));
1368 data = (struct io_state *)SvPVX (RETVAL);
1369 SvCUR_set (RETVAL, sizeof (struct io_state));
1370 SvPOK_only (RETVAL);
1371
1125 data.errorno = errno; 1372 data->errorno = errno;
1126 data.laststype = PL_laststype; 1373 data->laststype = PL_laststype;
1127 data.laststatval = PL_laststatval; 1374 data->laststatval = PL_laststatval;
1128 data.statcache = PL_statcache; 1375 data->statcache = PL_statcache;
1129
1130 RETVAL = newSVpvn ((char *)&data, sizeof data);
1131} 1376}
1132 OUTPUT: 1377 OUTPUT:
1133 RETVAL 1378 RETVAL
1134 1379
1135void 1380void
1136_aio_set_state (char *data_) 1381_set_state (char *data_)
1137 PROTOTYPE: $ 1382 PROTOTYPE: $
1138 CODE: 1383 CODE:
1139{ 1384{
1140 struct { 1385 struct io_state *data = (void *)data_;
1141 int errorno;
1142 int laststype;
1143 int laststatval;
1144 Stat_t statcache;
1145 } *data = (void *)data_;
1146 1386
1147 errno = data->errorno; 1387 errno = data->errorno;
1148 PL_laststype = data->laststype; 1388 PL_laststype = data->laststype;
1149 PL_laststatval = data->laststatval; 1389 PL_laststatval = data->laststatval;
1150 PL_statcache = data->statcache; 1390 PL_statcache = data->statcache;
1151} 1391}
1392

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