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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.141 by root, Mon Jan 22 18:45:17 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# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39#else
40# define REGISTER_STACK(cctx,start,end)
41#endif
42
43/* the maximum number of idle cctx that will be pooled */
44#define MAX_IDLE_CCTX 8
45
46#define PERL_VERSION_ATLEAST(a,b,c) \
47 (PERL_REVISION > (a) \
48 || (PERL_REVISION == (a) \
49 && (PERL_VERSION > (b) \
50 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
51
52#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 53# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 54# define PL_ppaddr ppaddr
14# endif 55# endif
15# ifndef call_sv 56# ifndef call_sv
16# define call_sv perl_call_sv 57# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 68# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 69# define IS_PADCONST(v) 0
29# endif 70# endif
30#endif 71#endif
31 72
32#include <stdio.h> 73/* 5.8.7 */
33#include <errno.h> 74#ifndef SvRV_set
75# define SvRV_set(s,v) SvRV(s) = (v)
76#endif
34 77
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 79# undef STACKGUARD
37#endif 80#endif
38 81
39#ifndef STACKGUARD 82#ifndef STACKGUARD
40# define STACKGUARD 0 83# define STACKGUARD 0
41#endif 84#endif
42 85
43#ifdef HAVE_MMAP 86/* prefer perl internal functions over our own? */
44# include <unistd.h> 87#ifndef PREFER_PERL_FUNCTIONS
45# include <sys/mman.h> 88# define PREFER_PERL_FUNCTIONS 0
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif
52# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif
61#endif 89#endif
62 90
63/* The next macro should declare a variable stacklevel that contains and approximation 91/* The next macro should declare a variable stacklevel that contains and approximation
64 * to the current C stack pointer. Its property is that it changes with each call 92 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */ 93 * and should be unique. */
66#define dSTACKLEVEL int stacklevel 94#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 95#define STACKLEVEL ((void *)&stacklevel)
68 96
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 97#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 98
99#if __GNUC__ >= 3
100# define attribute(x) __attribute__(x)
101# define BARRIER __asm__ __volatile__ ("" : : : "memory")
102#else
103# define attribute(x)
104# define BARRIER
105#endif
106
107#define NOINLINE attribute ((noinline))
108
71#include "CoroAPI.h" 109#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74 110
75#ifdef USE_ITHREADS 111#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 112static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else 115#else
80# define LOCK (void)0 116# define LOCK (void)0
81# define UNLOCK (void)0 117# define UNLOCK (void)0
82#endif 118#endif
83 119
120/* helper storage struct for Coro::AIO */
121struct io_state
122{
123 int errorno;
124 I32 laststype;
125 int laststatval;
126 Stat_t statcache;
127};
128
84static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
86static HV *coro_state_stash, *coro_stash; 131static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 132static SV *coro_mortal; /* will be freed after next transfer */
88 133
134static struct coro_cctx *cctx_first;
135static int cctx_count, cctx_idle;
136
89/* this is a structure representing a c-level coroutine */ 137/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 138typedef struct coro_cctx {
91 struct coro_stack *next; 139 struct coro_cctx *next;
92 140
93 /* the stack */ 141 /* the stack */
94 void *sptr; 142 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 143 ssize_t ssize; /* positive == mmap, otherwise malloc */
96 144
97 /* cpu state */ 145 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 146 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 148 JMPENV *top_env;
100 coro_context cctx; 149 coro_context cctx;
101} coro_stack;
102 150
103/* the (fake) coro_stack representing the main program */ 151 int inuse;
104static coro_stack *main_stack; 152
153#if USE_VALGRIND
154 int valgrind_id;
155#endif
156} coro_cctx;
157
158enum {
159 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */
162 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163};
105 164
106/* this is a structure representing a perl-level coroutine */ 165/* this is a structure representing a perl-level coroutine */
107struct coro { 166struct coro {
108 /* the c coroutine allocated to this perl coroutine, if any */ 167 /* the c coroutine allocated to this perl coroutine, if any */
109 coro_stack *stack; 168 coro_cctx *cctx;
110 169
111 /* data associated with this coroutine (initial args) */ 170 /* data associated with this coroutine (initial args) */
112 AV *args; 171 AV *args;
113 int refcnt; 172 int refcnt;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */
114 175
115 /* optionally saved, might be zero */ 176 /* optionally saved, might be zero */
116 AV *defav; 177 AV *defav; /* @_ */
117 SV *defsv; 178 SV *defsv; /* $_ */
118 SV *errsv; 179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
119 182
120 /* saved global state not related to stacks */ 183#define VAR(name,type) type name;
121 U8 dowarn; 184# include "state.h"
122 I32 in_eval; 185#undef VAR
123
124 /* the stacks and related info (callchain etc..) */
125 PERL_SI *curstackinfo;
126 AV *curstack;
127 AV *mainstack;
128 SV **stack_sp;
129 OP *op;
130 SV **curpad;
131 AV *comppad;
132 CV *compcv;
133 SV **stack_base;
134 SV **stack_max;
135 SV **tmps_stack;
136 I32 tmps_floor;
137 I32 tmps_ix;
138 I32 tmps_max;
139 I32 *markstack;
140 I32 *markstack_ptr;
141 I32 *markstack_max;
142 I32 *scopestack;
143 I32 scopestack_ix;
144 I32 scopestack_max;
145 ANY *savestack;
146 I32 savestack_ix;
147 I32 savestack_max;
148 OP **retstack;
149 I32 retstack_ix;
150 I32 retstack_max;
151 PMOP *curpm;
152 COP *curcop;
153 186
154 /* coro process data */ 187 /* coro process data */
155 int prio; 188 int prio;
156}; 189};
157 190
158typedef struct coro *Coro__State; 191typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 192typedef struct coro *Coro__State_or_hashref;
160 193
194/** Coro ********************************************************************/
195
196#define PRIO_MAX 3
197#define PRIO_HIGH 1
198#define PRIO_NORMAL 0
199#define PRIO_LOW -1
200#define PRIO_IDLE -3
201#define PRIO_MIN -4
202
203/* for Coro.pm */
204static SV *coro_current;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206static int coro_nready;
207
208/** lowlevel stuff **********************************************************/
209
161static AV * 210static AV *
162coro_clone_padlist (pTHX_ CV *cv) 211coro_clone_padlist (CV *cv)
163{ 212{
164 AV *padlist = CvPADLIST (cv); 213 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 214 AV *newpadlist, *newpad;
166 215
167 newpadlist = newAV (); 216 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 217 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 218#if PERL_VERSION_ATLEAST (5,9,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 222#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 224 --AvFILLp (padlist);
176 225
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
179 228
180 return newpadlist; 229 return newpadlist;
181} 230}
182 231
183static void 232static void
184free_padlist (pTHX_ AV *padlist) 233free_padlist (AV *padlist)
185{ 234{
186 /* may be during global destruction */ 235 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 236 if (SvREFCNT (padlist))
188 { 237 {
189 I32 i = AvFILLp (padlist); 238 I32 i = AvFILLp (padlist);
… …
210 AV *padlist; 259 AV *padlist;
211 AV *av = (AV *)mg->mg_obj; 260 AV *av = (AV *)mg->mg_obj;
212 261
213 /* casting is fun. */ 262 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 264 free_padlist (padlist);
216 265
217 SvREFCNT_dec (av); 266 SvREFCNT_dec (av);
218 267
219 return 0; 268 return 0;
220} 269}
221 270
222#define PERL_MAGIC_coro PERL_MAGIC_ext 271#define PERL_MAGIC_coro PERL_MAGIC_ext
223 272
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225 274
275#define CORO_MAGIC(cv) \
276 SvMAGIC (cv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278 ? SvMAGIC (cv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
280 : 0
281
226/* the next two functions merely cache the padlists */ 282/* the next two functions merely cache the padlists */
227static void 283static void
228get_padlist (pTHX_ CV *cv) 284get_padlist (CV *cv)
229{ 285{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 286 MAGIC *mg = CORO_MAGIC (cv);
287 AV *av;
231 288
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 291 else
235 { 292 {
236#if 0 293#if PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 294 /* this is probably cleaner, but also slower? */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 295 CV *cp = Perl_cv_clone (cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 296 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 297 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 298 SvREFCNT_dec (cp);
242#else 299#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 300 CvPADLIST (cv) = coro_clone_padlist (cv);
244#endif 301#endif
245 } 302 }
246} 303}
247 304
248static void 305static void
249put_padlist (pTHX_ CV *cv) 306put_padlist (CV *cv)
250{ 307{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 308 MAGIC *mg = CORO_MAGIC (cv);
309 AV *av;
252 310
253 if (!mg) 311 if (!mg)
254 { 312 {
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro; 315 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV (); 316 mg->mg_obj = (SV *)newAV ();
259 } 317 }
260 318
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 319 av = (AV *)mg->mg_obj;
320
321 if (AvFILLp (av) >= AvMAX (av))
322 av_extend (av, AvMAX (av) + 1);
323
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
262} 325}
326
327/** load & save, init *******************************************************/
263 328
264#define SB do { 329#define SB do {
265#define SE } while (0) 330#define SE } while (0)
266 331
267#define LOAD(state) load_state(aTHX_ (state));
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
271 333
272static void 334static void
273load_state(pTHX_ Coro__State c) 335load_perl (Coro__State c)
274{ 336{
275 PL_dowarn = c->dowarn; 337#define VAR(name,type) PL_ ## name = c->name;
276 PL_in_eval = c->in_eval; 338# include "state.h"
277 339#undef VAR
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 340
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
312 355
313 { 356 {
314 dSP; 357 dSP;
315 CV *cv; 358 CV *cv;
316 359
317 /* now do the ugly restore mess */ 360 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 361 while ((cv = (CV *)POPs))
319 { 362 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 363 put_padlist (cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 364 CvDEPTH (cv) = PTR2IV (POPs);
326 } 365 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 366 }
330 367
331 PUTBACK; 368 PUTBACK;
332 } 369 }
333} 370}
334 371
335static void 372static void
336save_state(pTHX_ Coro__State c, int flags) 373save_perl (Coro__State c)
337{ 374{
338 { 375 {
339 dSP; 376 dSP;
340 I32 cxix = cxstack_ix; 377 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 378 PERL_CONTEXT *ccstk = cxstack;
… …
344 /* 381 /*
345 * the worst thing you can imagine happens first - we have to save 382 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 383 * (and reinitialize) all cv's in the whole callchain :(
347 */ 384 */
348 385
386 EXTEND (SP, 3 + 1);
349 PUSHs (Nullsv); 387 PUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 388 /* this loop was inspired by pp_caller */
351 for (;;) 389 for (;;)
352 { 390 {
353 while (cxix >= 0) 391 while (cxix >= 0)
354 { 392 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 393 PERL_CONTEXT *cx = &ccstk[cxix--];
356 394
357 if (CxTYPE(cx) == CXt_SUB) 395 if (CxTYPE (cx) == CXt_SUB)
358 { 396 {
359 CV *cv = cx->blk_sub.cv; 397 CV *cv = cx->blk_sub.cv;
398
360 if (CvDEPTH(cv)) 399 if (CvDEPTH (cv))
361 { 400 {
362 EXTEND (SP, CvDEPTH(cv)*2); 401 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)); 402 PUSHs ((SV *)CvPADLIST (cv));
403 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 404 PUSHs ((SV *)cv);
373 405
406 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 407 get_padlist (cv);
375 } 408 }
376 } 409 }
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 } 410 }
386 411
387 if (top_si->si_type == PERLSI_MAIN) 412 if (top_si->si_type == PERLSI_MAIN)
388 break; 413 break;
389 414
… …
393 } 418 }
394 419
395 PUTBACK; 420 PUTBACK;
396 } 421 }
397 422
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 423 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; 424 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 425 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
426 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401 427
402 c->dowarn = PL_dowarn; 428#define VAR(name,type)c->name = PL_ ## name;
403 c->in_eval = PL_in_eval; 429# include "state.h"
404 430#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} 431}
436 432
437/* 433/*
438 * allocate various perl stacks. This is an exact copy 434 * allocate various perl stacks. This is an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 435 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 436 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 437 * not usually need a lot of stackspace.
442 */ 438 */
439#if PREFER_PERL_FUNCTIONS
440# define coro_init_stacks init_stacks
441#else
443static void 442static void
444coro_init_stacks (pTHX) 443coro_init_stacks ()
445{ 444{
446 LOCK;
447
448 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 445 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
449 PL_curstackinfo->si_type = PERLSI_MAIN; 446 PL_curstackinfo->si_type = PERLSI_MAIN;
450 PL_curstack = PL_curstackinfo->si_stack; 447 PL_curstack = PL_curstackinfo->si_stack;
451 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452 449
453 PL_stack_base = AvARRAY(PL_curstack); 450 PL_stack_base = AvARRAY(PL_curstack);
454 PL_stack_sp = PL_stack_base; 451 PL_stack_sp = PL_stack_base;
455 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456 453
457 New(50,PL_tmps_stack,96,SV*); 454 New(50,PL_tmps_stack,128,SV*);
458 PL_tmps_floor = -1; 455 PL_tmps_floor = -1;
459 PL_tmps_ix = -1; 456 PL_tmps_ix = -1;
460 PL_tmps_max = 96; 457 PL_tmps_max = 128;
461 458
462 New(54,PL_markstack,16,I32); 459 New(54,PL_markstack,32,I32);
463 PL_markstack_ptr = PL_markstack; 460 PL_markstack_ptr = PL_markstack;
464 PL_markstack_max = PL_markstack + 16; 461 PL_markstack_max = PL_markstack + 32;
465 462
466#ifdef SET_MARK_OFFSET 463#ifdef SET_MARK_OFFSET
467 SET_MARK_OFFSET; 464 SET_MARK_OFFSET;
468#endif 465#endif
469 466
470 New(54,PL_scopestack,16,I32); 467 New(54,PL_scopestack,32,I32);
471 PL_scopestack_ix = 0; 468 PL_scopestack_ix = 0;
472 PL_scopestack_max = 16; 469 PL_scopestack_max = 32;
473 470
474 New(54,PL_savestack,96,ANY); 471 New(54,PL_savestack,64,ANY);
475 PL_savestack_ix = 0; 472 PL_savestack_ix = 0;
476 PL_savestack_max = 96; 473 PL_savestack_max = 64;
477 474
478#if PERL_VERSION < 9 475#if !PERL_VERSION_ATLEAST (5,9,0)
479 New(54,PL_retstack,8,OP*); 476 New(54,PL_retstack,16,OP*);
480 PL_retstack_ix = 0; 477 PL_retstack_ix = 0;
481 PL_retstack_max = 8; 478 PL_retstack_max = 16;
482#endif 479#endif
483
484 UNLOCK;
485} 480}
481#endif
486 482
487/* 483/*
488 * destroy the stacks, the callchain etc... 484 * destroy the stacks, the callchain etc...
489 */ 485 */
490static void 486static void
491destroy_stacks(pTHX) 487coro_destroy_stacks ()
492{ 488{
493 if (!IN_DESTRUCT) 489 if (!IN_DESTRUCT)
494 { 490 {
495 /* is this ugly, I ask? */ 491 /* restore all saved variables and stuff */
496 LEAVE_SCOPE (0); 492 LEAVE_SCOPE (0);
493 assert (PL_tmps_floor == -1);
497 494
498 /* sure it is, but more important: is it correct?? :/ */ 495 /* free all temporaries */
499 FREETMPS; 496 FREETMPS;
497 assert (PL_tmps_ix == -1);
500 498
499 /* unwind all extra stacks */
501 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 500 POPSTACK_TO (PL_mainstack);
501
502 /* unwind main stack */
503 dounwind (-1);
502 } 504 }
503 505
504 while (PL_curstackinfo->si_next) 506 while (PL_curstackinfo->si_next)
505 PL_curstackinfo = PL_curstackinfo->si_next; 507 PL_curstackinfo = PL_curstackinfo->si_next;
506 508
507 while (PL_curstackinfo) 509 while (PL_curstackinfo)
508 { 510 {
509 PERL_SI *p = PL_curstackinfo->si_prev; 511 PERL_SI *p = PL_curstackinfo->si_prev;
510 512
511 { /*D*//*remove*/
512 dSP;
513 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514 PUTBACK; /* possibly superfluous */
515 }
516
517 if (!IN_DESTRUCT) 513 if (!IN_DESTRUCT)
518 {
519 dounwind (-1);/*D*//*remove*/
520 SvREFCNT_dec (PL_curstackinfo->si_stack); 514 SvREFCNT_dec (PL_curstackinfo->si_stack);
521 }
522 515
523 Safefree (PL_curstackinfo->si_cxstack); 516 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree (PL_curstackinfo); 517 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 518 PL_curstackinfo = p;
526 } 519 }
527 520
528 Safefree (PL_tmps_stack); 521 Safefree (PL_tmps_stack);
529 Safefree (PL_markstack); 522 Safefree (PL_markstack);
530 Safefree (PL_scopestack); 523 Safefree (PL_scopestack);
531 Safefree (PL_savestack); 524 Safefree (PL_savestack);
532#if PERL_VERSION < 9 525#if !PERL_VERSION_ATLEAST (5,9,0)
533 Safefree (PL_retstack); 526 Safefree (PL_retstack);
534#endif 527#endif
535} 528}
529
530/** coroutine stack handling ************************************************/
536 531
537static void 532static void
538setup_coro (struct coro *coro) 533setup_coro (struct coro *coro)
539{ 534{
540 /* 535 /*
541 * emulate part of the perl startup here. 536 * emulate part of the perl startup here.
542 */ 537 */
543 dTHX; 538
539 coro_init_stacks ();
540
541 PL_curcop = &PL_compiling;
542 PL_in_eval = EVAL_NULL;
543 PL_curpm = 0;
544 PL_localizing = 0;
545 PL_dirty = 0;
546 PL_restartop = 0;
547
548 {
549 dSP;
550 LOGOP myop;
551
552 SvREFCNT_dec (GvAV (PL_defgv));
553 GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555 Zero (&myop, 1, LOGOP);
556 myop.op_next = Nullop;
557 myop.op_flags = OPf_WANT_VOID;
558
559 PUSHMARK (SP);
560 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
561 PUTBACK;
562 PL_op = (OP *)&myop;
563 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
564 SPAGAIN;
565 }
566
567 ENTER; /* necessary e.g. for dounwind */
568}
569
570static void
571free_coro_mortal ()
572{
573 if (coro_mortal)
574 {
575 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0;
577 }
578}
579
580/* inject a fake call to Coro::State::_cctx_init into the execution */
581static void NOINLINE
582prepare_cctx (coro_cctx *cctx)
583{
544 dSP; 584 dSP;
545 UNOP myop; 585 LOGOP myop;
546 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547 586
548 coro_init_stacks (aTHX);
549 /*PL_curcop = 0;*/
550 /*PL_in_eval = PL_in_eval;*/ /* inherit */
551 SvREFCNT_dec (GvAV (PL_defgv));
552 GvAV (PL_defgv) = coro->args; coro->args = 0;
553
554 SPAGAIN;
555
556 Zero (&myop, 1, UNOP); 587 Zero (&myop, 1, LOGOP);
557 myop.op_next = Nullop; 588 myop.op_next = PL_op;
558 myop.op_flags = OPf_WANT_VOID; 589 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559 590
591 PUSHMARK (SP);
592 EXTEND (SP, 2);
593 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
594 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
595 PUTBACK;
560 PL_op = (OP *)&myop; 596 PL_op = (OP *)&myop;
561
562 PUSHMARK(SP);
563 XPUSHs (sub_init);
564 PUTBACK;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 597 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566 SPAGAIN; 598 SPAGAIN;
567
568 ENTER; /* necessary e.g. for dounwind */
569}
570
571static void
572free_coro_mortal ()
573{
574 if (coro_mortal)
575 {
576 SvREFCNT_dec (coro_mortal);
577 coro_mortal = 0;
578 }
579} 599}
580 600
581static void 601static void
582coro_run (void *arg) 602coro_run (void *arg)
583{ 603{
604 /* coro_run is the alternative tail of transfer(), so unlock here. */
605 UNLOCK;
606
584 /* 607 /*
585 * this is a _very_ stripped down perl interpreter ;) 608 * this is a _very_ stripped down perl interpreter ;)
586 */ 609 */
587 dTHX;
588 int ret;
589
590 UNLOCK;
591
592 PL_top_env = &PL_start_env; 610 PL_top_env = &PL_start_env;
593 611
594 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 612 /* inject call to cctx_init */
595 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 613 prepare_cctx ((coro_cctx *)arg);
596
597 /* continue at cctx_init, without entersub */
598 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599 614
600 /* somebody will hit me for both perl_run and PL_restartop */ 615 /* somebody will hit me for both perl_run and PL_restartop */
601 ret = perl_run (aTHX_ PERL_GET_CONTEXT); 616 PL_restartop = PL_op;
602 printf ("ret %d\n", ret);//D 617 perl_run (PL_curinterp);
603 618
604 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
605 abort (); 620 abort ();
606} 621}
607 622
608static coro_stack * 623static coro_cctx *
609stack_new () 624cctx_new ()
610{ 625{
611 coro_stack *stack; 626 coro_cctx *cctx;
612 627
628 ++cctx_count;
629
613 New (0, stack, 1, coro_stack); 630 Newz (0, cctx, 1, coro_cctx);
614 631
615#if HAVE_MMAP 632#if HAVE_MMAP
616 633
617 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 634 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
618 /* mmap suppsedly does allocate-on-write for us */ 635 /* mmap supposedly does allocate-on-write for us */
619 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 636 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620 637
621 if (stack->sptr == (void *)-1) 638 if (cctx->sptr != (void *)-1)
622 {
623 perror ("FATAL: unable to mmap stack for coroutine");
624 _exit (EXIT_FAILURE);
625 } 639 {
626
627# if STACKGUARD 640# if STACKGUARD
628 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 641 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629# endif 642# endif
643 REGISTER_STACK (
644 cctx,
645 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
646 cctx->ssize + (char *)cctx->sptr
647 );
630 648
631#else 649 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
632 650 }
651 else
652#endif
653 {
633 stack->ssize = STACKSIZE * (long)sizeof (long); 654 cctx->ssize = -STACKSIZE * (long)sizeof (long);
634 New (0, stack->sptr, STACKSIZE, long); 655 New (0, cctx->sptr, STACKSIZE, long);
635 656
636 if (!stack->sptr) 657 if (!cctx->sptr)
637 { 658 {
638 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 659 perror ("FATAL: unable to allocate stack for coroutine");
639 _exit (EXIT_FAILURE); 660 _exit (EXIT_FAILURE);
640 } 661 }
641 662
642#endif 663 REGISTER_STACK (
664 cctx,
665 (char *)cctx->sptr,
666 (char *)cctx->sptr - cctx->ssize
667 );
643 668
644 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 669 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
670 }
645 671
646 return stack; 672 return cctx;
647} 673}
648 674
649static void 675static void
650stack_free (coro_stack *stack) 676cctx_destroy (coro_cctx *cctx)
651{ 677{
652 if (!stack || stack == main_stack) 678 if (!cctx)
653 return; 679 return;
654 680
681 --cctx_count;
682
683#if USE_VALGRIND
684 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
685#endif
686
655#if HAVE_MMAP 687#if HAVE_MMAP
688 if (cctx->ssize > 0)
656 munmap (stack->sptr, stack->ssize); 689 munmap (cctx->sptr, cctx->ssize);
657#else 690 else
691#endif
658 Safefree (stack->sptr); 692 Safefree (cctx->sptr);
659#endif
660 693
661 Safefree (stack); 694 Safefree (cctx);
662} 695}
663 696
664static coro_stack *stack_first;
665
666static coro_stack * 697static coro_cctx *
667stack_get () 698cctx_get ()
668{ 699{
669 coro_stack *stack; 700 coro_cctx *cctx;
670 701
671 if (stack_first) 702 if (cctx_first)
672 { 703 {
673 stack = stack_first; 704 cctx = cctx_first;
674 stack_first = stack->next; 705 cctx_first = cctx->next;
706 --cctx_idle;
675 } 707 }
676 else 708 else
677 { 709 {
678 stack = stack_new (); 710 cctx = cctx_new ();
679 PL_op = PL_op->op_next; 711 PL_op = PL_op->op_next;
680 } 712 }
681 713
682 return stack; 714 return cctx;
683} 715}
684 716
685static void 717static void
686stack_put (coro_stack *stack) 718cctx_put (coro_cctx *cctx)
687{ 719{
688 stack->next = stack_first; 720 /* free another cctx if overlimit */
689 stack_first = stack; 721 if (cctx_idle >= MAX_IDLE_CCTX)
722 {
723 coro_cctx *first = cctx_first;
724 cctx_first = first->next;
725 --cctx_idle;
726
727 assert (!first->inuse);
728 cctx_destroy (first);
729 }
730
731 ++cctx_idle;
732 cctx->next = cctx_first;
733 cctx_first = cctx;
690} 734}
735
736/** coroutine switching *****************************************************/
691 737
692/* never call directly, always through the coro_state_transfer global variable */ 738/* never call directly, always through the coro_state_transfer global variable */
693static void 739static void NOINLINE
694transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 740transfer (struct coro *prev, struct coro *next)
695{ 741{
696 dSTACKLEVEL; 742 dSTACKLEVEL;
697 743
698 /* sometimes transfer is only called to set idle_sp */ 744 /* sometimes transfer is only called to set idle_sp */
699 if (flags == TRANSFER_SET_STACKLEVEL) 745 if (!next)
746 {
700 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 747 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
748 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
749 }
701 else if (prev != next) 750 else if (prev != next)
702 { 751 {
703 coro_stack *prev__stack; 752 coro_cctx *prev__cctx;
753
754 if (prev->flags & CF_NEW)
755 {
756 /* create a new empty context */
757 Newz (0, prev->cctx, 1, coro_cctx);
758 prev->cctx->inuse = 1;
759 prev->flags &= ~CF_NEW;
760 prev->flags |= CF_RUNNING;
761 }
762
763 /*TODO: must not croak here */
764 if (!prev->flags & CF_RUNNING)
765 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
766
767 if (next->flags & CF_RUNNING)
768 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
769
770 if (next->flags & CF_DESTROYED)
771 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
772
773 prev->flags &= ~CF_RUNNING;
774 next->flags |= CF_RUNNING;
704 775
705 LOCK; 776 LOCK;
706 777
707 if (next->mainstack) 778 if (next->flags & CF_NEW)
708 { 779 {
709 /* coroutine already started */ 780 /* need to start coroutine */
710 SAVE (prev, flags); 781 next->flags &= ~CF_NEW;
711 LOAD (next); 782 /* first get rid of the old state */
783 save_perl (prev);
784 /* setup coroutine call */
785 setup_coro (next);
786 /* need a new stack */
787 assert (!next->cctx);
712 } 788 }
713 else 789 else
714 { 790 {
715 /* need to start coroutine */ 791 /* coroutine already started */
716 /* first get rid of the old state */ 792 save_perl (prev);
717 SAVE (prev, -1); 793 load_perl (next);
718 /* setup coroutine call */
719 setup_coro (next);
720 /* need a stack */
721 next->stack = 0;
722 } 794 }
723 795
724 prev__stack = prev->stack; 796 prev__cctx = prev->cctx;
725 797
726 /* possibly "free" the stack */ 798 /* possibly "free" the cctx */
727 if (prev__stack->idle_sp == STACKLEVEL) 799 if (prev__cctx->idle_sp == STACKLEVEL)
728 { 800 {
729 stack_put (prev__stack); 801 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
802 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
803
730 prev->stack = 0; 804 prev->cctx = 0;
805
806 cctx_put (prev__cctx);
807 prev__cctx->inuse = 0;
731 } 808 }
732 809
733 if (!next->stack) 810 if (!next->cctx)
734 next->stack = stack_get ();
735
736 if (prev__stack != next->stack)
737 { 811 {
738 prev__stack->top_env = PL_top_env; 812 next->cctx = cctx_get ();
739 PL_top_env = next->stack->top_env; 813 assert (!next->cctx->inuse);
740 printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D 814 next->cctx->inuse = 1;
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 } 815 }
743 816
817 if (prev__cctx != next->cctx)
818 {
819 prev__cctx->top_env = PL_top_env;
820 PL_top_env = next->cctx->top_env;
821 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
822 }
823
744 free_coro_mortal (); 824 free_coro_mortal ();
745
746 UNLOCK; 825 UNLOCK;
747 } 826 }
748} 827}
749 828
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args 829struct transfer_args
756{ 830{
757 struct coro *prev, *next; 831 struct coro *prev, *next;
758 int flags;
759}; 832};
760 833
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags) 834#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
762 835
836/** high level stuff ********************************************************/
837
763static void 838static int
764coro_state_destroy (struct coro *coro) 839coro_state_destroy (struct coro *coro)
765{ 840{
766 if (coro->refcnt--) 841 if (coro->flags & CF_DESTROYED)
767 return; 842 return 0;
843
844 coro->flags |= CF_DESTROYED;
845
846 if (coro->flags & CF_READY)
847 {
848 /* reduce nready, as destroying a ready coro effectively unreadies it */
849 /* alternative: look through all ready queues and remove the coro */
850 LOCK;
851 --coro_nready;
852 UNLOCK;
853 }
854 else
855 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768 856
769 if (coro->mainstack && coro->mainstack != main_mainstack) 857 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 858 {
771 struct coro temp; 859 struct coro temp;
772 860
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 861 assert (!(coro->flags & CF_RUNNING));
774 LOAD (aTHX_ coro);
775 862
863 Zero (&temp, 1, struct coro);
864 temp.save = CORO_SAVE_ALL;
865
866 if (coro->flags & CF_RUNNING)
867 croak ("FATAL: tried to destroy currently running coroutine");
868
869 save_perl (&temp);
870 load_perl (coro);
871
776 destroy_stacks (aTHX); 872 coro_destroy_stacks ();
777 873
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 874 load_perl (&temp); /* this will get rid of defsv etc.. */
779 875
780 coro->mainstack = 0; 876 coro->mainstack = 0;
781 } 877 }
782 878
783 stack_free (coro->stack); 879 cctx_destroy (coro->cctx);
784 SvREFCNT_dec (coro->args); 880 SvREFCNT_dec (coro->args);
785 Safefree (coro); 881
882 return 1;
786} 883}
787 884
788static int 885static int
789coro_state_clear (SV *sv, MAGIC *mg) 886coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790{ 887{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 888 struct coro *coro = (struct coro *)mg->mg_ptr;
792 mg->mg_ptr = 0; 889 mg->mg_ptr = 0;
793 890
891 if (--coro->refcnt < 0)
892 {
794 coro_state_destroy (coro); 893 coro_state_destroy (coro);
894 Safefree (coro);
895 }
795 896
796 return 0; 897 return 0;
797} 898}
798 899
799static int 900static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 901coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801{ 902{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 903 struct coro *coro = (struct coro *)mg->mg_ptr;
803 904
804 ++coro->refcnt; 905 ++coro->refcnt;
805 906
806 return 0; 907 return 0;
807} 908}
808 909
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 910static MGVTBL coro_state_vtbl = {
911 0, 0, 0, 0,
912 coro_state_free,
913 0,
914#ifdef MGf_DUP
915 coro_state_dup,
916#else
917# define MGf_DUP 0
918#endif
919};
810 920
811static struct coro * 921static struct coro *
812SvSTATE (SV *coro) 922SvSTATE (SV *coro)
813{ 923{
814 HV *stash; 924 HV *stash;
… …
829 assert (mg->mg_type == PERL_MAGIC_ext); 939 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr; 940 return (struct coro *)mg->mg_ptr;
831} 941}
832 942
833static void 943static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 944prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835{ 945{
836 ta->prev = SvSTATE (prev); 946 ta->prev = SvSTATE (prev_sv);
837 ta->next = SvSTATE (next); 947 ta->next = SvSTATE (next_sv);
838 ta->flags = flags;
839} 948}
840 949
841static void 950static void
842api_transfer (SV *prev, SV *next, int flags) 951api_transfer (SV *prev_sv, SV *next_sv)
843{ 952{
844 dTHX;
845 struct transfer_args ta; 953 struct transfer_args ta;
846 954
847 prepare_transfer (aTHX_ &ta, prev, next, flags); 955 prepare_transfer (&ta, prev_sv, next_sv);
848 TRANSFER (ta); 956 TRANSFER (ta);
849} 957}
850 958
959static int
960api_save (SV *coro_sv, int new_save)
961{
962 struct coro *coro = SvSTATE (coro_sv);
963 int old_save = coro->save;
964
965 if (new_save >= 0)
966 coro->save = new_save;
967
968 return old_save;
969}
970
851/** Coro ********************************************************************/ 971/** Coro ********************************************************************/
852 972
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void 973static void
866coro_enq (pTHX_ SV *sv) 974coro_enq (SV *coro_sv)
867{ 975{
868 int prio;
869
870 if (SvTYPE (sv) != SVt_PVHV)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv); 976 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876 coro_nready++;
877} 977}
878 978
879static SV * 979static SV *
880coro_deq (pTHX_ int min_prio) 980coro_deq (int min_prio)
881{ 981{
882 int prio = PRIO_MAX - PRIO_MIN; 982 int prio = PRIO_MAX - PRIO_MIN;
883 983
884 min_prio -= PRIO_MIN; 984 min_prio -= PRIO_MIN;
885 if (min_prio < 0) 985 if (min_prio < 0)
886 min_prio = 0; 986 min_prio = 0;
887 987
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 988 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0) 989 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]); 990 return av_shift (coro_ready [prio]);
893 }
894 991
895 return 0; 992 return 0;
896} 993}
897 994
898static void 995static int
899api_ready (SV *coro) 996api_ready (SV *coro_sv)
900{ 997{
901 dTHX; 998 struct coro *coro;
902 999
903 if (SvROK (coro)) 1000 if (SvROK (coro_sv))
904 coro = SvRV (coro); 1001 coro_sv = SvRV (coro_sv);
1002
1003 coro = SvSTATE (coro_sv);
1004
1005 if (coro->flags & CF_READY)
1006 return 0;
1007
1008 coro->flags |= CF_READY;
905 1009
906 LOCK; 1010 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1011 coro_enq (SvREFCNT_inc (coro_sv));
1012 ++coro_nready;
908 UNLOCK; 1013 UNLOCK;
909}
910 1014
1015 return 1;
1016}
1017
911static void 1018static int
1019api_is_ready (SV *coro_sv)
1020{
1021 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1022}
1023
1024static void
912prepare_schedule (aTHX_ struct transfer_args *ta) 1025prepare_schedule (struct transfer_args *ta)
913{ 1026{
914 SV *current, *prev, *next; 1027 SV *prev_sv, *next_sv;
1028
1029 for (;;)
1030 {
1031 LOCK;
1032 next_sv = coro_deq (PRIO_MIN);
1033
1034 /* nothing to schedule: call the idle handler */
1035 if (!next_sv)
1036 {
1037 dSP;
1038 UNLOCK;
1039
1040 ENTER;
1041 SAVETMPS;
1042
1043 PUSHMARK (SP);
1044 PUTBACK;
1045 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1046
1047 FREETMPS;
1048 LEAVE;
1049 continue;
1050 }
1051
1052 ta->next = SvSTATE (next_sv);
1053
1054 /* cannot transfer to destroyed coros, skip and look for next */
1055 if (ta->next->flags & CF_DESTROYED)
1056 {
1057 UNLOCK;
1058 SvREFCNT_dec (next_sv);
1059 /* coro_nready is already taken care of by destroy */
1060 continue;
1061 }
1062
1063 --coro_nready;
1064 UNLOCK;
1065 break;
1066 }
1067
1068 /* free this only after the transfer */
1069 prev_sv = SvRV (coro_current);
1070 SvRV_set (coro_current, next_sv);
1071 ta->prev = SvSTATE (prev_sv);
1072
1073 assert (ta->next->flags & CF_READY);
1074 ta->next->flags &= ~CF_READY;
915 1075
916 LOCK; 1076 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 }
944 }
945
946 prev = SvRV (current);
947 SvRV (current) = next;
948
949 /* free this only after the transfer */
950 free_coro_mortal (); 1077 free_coro_mortal ();
951 coro_mortal = prev; 1078 coro_mortal = prev_sv;
952
953 ta->prev = SvSTATE (prev);
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956
957 UNLOCK; 1079 UNLOCK;
958} 1080}
959 1081
960static void 1082static void
961prepare_cede (aTHX_ struct transfer_args *ta) 1083prepare_cede (struct transfer_args *ta)
962{ 1084{
963 LOCK; 1085 api_ready (coro_current);
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 prepare_schedule (ta); 1086 prepare_schedule (ta);
968} 1087}
969 1088
1089static int
1090prepare_cede_notself (struct transfer_args *ta)
1091{
1092 if (coro_nready)
1093 {
1094 SV *prev = SvRV (coro_current);
1095 prepare_schedule (ta);
1096 api_ready (prev);
1097 return 1;
1098 }
1099 else
1100 return 0;
1101}
1102
970static void 1103static void
971api_schedule (void) 1104api_schedule (void)
972{ 1105{
973 dTHX;
974 struct transfer_args ta; 1106 struct transfer_args ta;
975 1107
976 prepare_schedule (&ta); 1108 prepare_schedule (&ta);
977 TRANSFER (ta); 1109 TRANSFER (ta);
978} 1110}
979 1111
980static void 1112static int
981api_cede (void) 1113api_cede (void)
982{ 1114{
983 dTHX;
984 struct transfer_args ta; 1115 struct transfer_args ta;
985 1116
986 prepare_cede (&ta); 1117 prepare_cede (&ta);
1118
1119 if (ta.prev != ta.next)
1120 {
987 TRANSFER (ta); 1121 TRANSFER (ta);
1122 return 1;
1123 }
1124 else
1125 return 0;
1126}
1127
1128static int
1129api_cede_notself (void)
1130{
1131 struct transfer_args ta;
1132
1133 if (prepare_cede_notself (&ta))
1134 {
1135 TRANSFER (ta);
1136 return 1;
1137 }
1138 else
1139 return 0;
988} 1140}
989 1141
990MODULE = Coro::State PACKAGE = Coro::State 1142MODULE = Coro::State PACKAGE = Coro::State
991 1143
992PROTOTYPES: DISABLE 1144PROTOTYPES: DISABLE
… …
998#endif 1150#endif
999 BOOT_PAGESIZE; 1151 BOOT_PAGESIZE;
1000 1152
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1153 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 1154
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1155 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1156 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1157 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1158 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1159 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006 1160
1007 main_mainstack = PL_mainstack; 1161 main_mainstack = PL_mainstack;
1008 1162
1009 coroapi.ver = CORO_API_VERSION; 1163 coroapi.ver = CORO_API_VERSION;
1010 coroapi.transfer = api_transfer; 1164 coroapi.transfer = api_transfer;
1011
1012 Newz (0, main_stack, 1, coro_stack);
1013 main_stack->idle_sp = (void *)-1;
1014 1165
1015 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1166 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016} 1167}
1017 1168
1018SV * 1169SV *
… …
1023 HV *hv; 1174 HV *hv;
1024 int i; 1175 int i;
1025 1176
1026 Newz (0, coro, 1, struct coro); 1177 Newz (0, coro, 1, struct coro);
1027 coro->args = newAV (); 1178 coro->args = newAV ();
1179 coro->save = CORO_SAVE_ALL;
1180 coro->flags = CF_NEW;
1028 1181
1029 hv = newHV (); 1182 hv = newHV ();
1030 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1183 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1184 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032 1185
1033 for (i = 1; i < items; i++) 1186 for (i = 1; i < items; i++)
1034 av_push (coro->args, newSVsv (ST (i))); 1187 av_push (coro->args, newSVsv (ST (i)));
1035
1036 coro->stack = main_stack;
1037 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1038 /*coro->stack = 0;*/
1039} 1188}
1040 OUTPUT: 1189 OUTPUT:
1190 RETVAL
1191
1192int
1193save (SV *coro, int new_save = -1)
1194 CODE:
1195 RETVAL = api_save (coro, new_save);
1196 OUTPUT:
1041 RETVAL 1197 RETVAL
1042 1198
1043void 1199void
1044_set_stacklevel (...) 1200_set_stacklevel (...)
1045 ALIAS: 1201 ALIAS:
1046 Coro::State::transfer = 1 1202 Coro::State::transfer = 1
1047 Coro::schedule = 2 1203 Coro::schedule = 2
1048 Coro::cede = 3 1204 Coro::cede = 3
1049 Coro::Cont::yield = 4 1205 Coro::cede_notself = 4
1050 CODE: 1206 CODE:
1051{ 1207{
1052 struct transfer_args ta; 1208 struct transfer_args ta;
1053 1209
1054 switch (ix) 1210 switch (ix)
1055 { 1211 {
1056 case 0: 1212 case 0:
1057 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1213 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058 ta.next = 0; 1214 ta.next = 0;
1059 ta.flags = TRANSFER_SET_STACKLEVEL;
1060 break; 1215 break;
1061 1216
1062 case 1: 1217 case 1:
1063 if (items != 3) 1218 if (items != 2)
1064 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1219 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065 1220
1066 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1221 prepare_transfer (&ta, ST (0), ST (1));
1067 break; 1222 break;
1068 1223
1069 case 2: 1224 case 2:
1070 prepare_schedule (&ta); 1225 prepare_schedule (&ta);
1071 break; 1226 break;
… …
1073 case 3: 1228 case 3:
1074 prepare_cede (&ta); 1229 prepare_cede (&ta);
1075 break; 1230 break;
1076 1231
1077 case 4: 1232 case 4:
1078 { 1233 if (!prepare_cede_notself (&ta))
1079 SV *yieldstack; 1234 XSRETURN_EMPTY;
1080 SV *sv;
1081 AV *defav = GvAV (PL_defgv);
1082 1235
1083 yieldstack = *hv_fetch (
1084 (HV *)SvRV (GvSV (coro_current)),
1085 "yieldstack", sizeof ("yieldstack") - 1,
1086 0
1087 );
1088
1089 /* set up @_ -- ugly */
1090 av_clear (defav);
1091 av_fill (defav, items - 1);
1092 while (items--)
1093 av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095 sv = av_pop ((AV *)SvRV (yieldstack));
1096 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098 ta.flags = 0;
1099 SvREFCNT_dec (sv);
1100 }
1101 break; 1236 break;
1102
1103 } 1237 }
1104 1238
1239 BARRIER;
1105 TRANSFER (ta); 1240 TRANSFER (ta);
1106}
1107 1241
1108void 1242 if (GIMME_V != G_VOID && ta.next != ta.prev)
1109_clone_state_from (SV *dst, SV *src) 1243 XSRETURN_YES;
1244}
1245
1246bool
1247_destroy (SV *coro_sv)
1110 CODE: 1248 CODE:
1111{ 1249 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1112 struct coro *coro_src = SvSTATE (src); 1250 OUTPUT:
1113 1251 RETVAL
1114 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116 ++coro_src->refcnt;
1117 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118}
1119
1120void
1121_nonlocal_goto (IV nextop)
1122 CODE:
1123 /* uuh, somebody will kill me again for this */
1124 PL_op->op_next = INT2PTR (OP *, nextop);
1125 1252
1126void 1253void
1127_exit (code) 1254_exit (code)
1128 int code 1255 int code
1129 PROTOTYPE: $ 1256 PROTOTYPE: $
1130 CODE: 1257 CODE:
1131 _exit (code); 1258 _exit (code);
1132 1259
1260int
1261cctx_count ()
1262 CODE:
1263 RETVAL = cctx_count;
1264 OUTPUT:
1265 RETVAL
1266
1267int
1268cctx_idle ()
1269 CODE:
1270 RETVAL = cctx_idle;
1271 OUTPUT:
1272 RETVAL
1273
1133MODULE = Coro::State PACKAGE = Coro 1274MODULE = Coro::State PACKAGE = Coro
1134 1275
1135BOOT: 1276BOOT:
1136{ 1277{
1137 int i; 1278 int i;
… …
1143 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1284 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1285 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1286 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1287 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147 1288
1148 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1289 coro_current = get_sv ("Coro::current", FALSE);
1149 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1290 SvREADONLY_on (coro_current);
1150 1291
1151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1292 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152 coro_ready[i] = newAV (); 1293 coro_ready[i] = newAV ();
1153 1294
1154 { 1295 {
1155 SV *sv = perl_get_sv("Coro::API", 1); 1296 SV *sv = perl_get_sv("Coro::API", 1);
1156 1297
1157 coroapi.schedule = api_schedule; 1298 coroapi.schedule = api_schedule;
1299 coroapi.save = api_save;
1158 coroapi.cede = api_cede; 1300 coroapi.cede = api_cede;
1301 coroapi.cede_notself = api_cede_notself;
1159 coroapi.ready = api_ready; 1302 coroapi.ready = api_ready;
1303 coroapi.is_ready = api_is_ready;
1160 coroapi.nready = &coro_nready; 1304 coroapi.nready = &coro_nready;
1161 coroapi.current = coro_current; 1305 coroapi.current = coro_current;
1162 1306
1163 GCoroAPI = &coroapi; 1307 GCoroAPI = &coroapi;
1164 sv_setiv (sv, (IV)&coroapi); 1308 sv_setiv (sv, (IV)&coroapi);
1165 SvREADONLY_on (sv); 1309 SvREADONLY_on (sv);
1166 } 1310 }
1167} 1311}
1312
1313void
1314_set_current (SV *current)
1315 PROTOTYPE: $
1316 CODE:
1317 SvREFCNT_dec (SvRV (coro_current));
1318 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168 1319
1169int 1320int
1170prio (Coro::State coro, int newprio = 0) 1321prio (Coro::State coro, int newprio = 0)
1171 ALIAS: 1322 ALIAS:
1172 nice = 1 1323 nice = 1
… …
1175 RETVAL = coro->prio; 1326 RETVAL = coro->prio;
1176 1327
1177 if (items > 1) 1328 if (items > 1)
1178 { 1329 {
1179 if (ix) 1330 if (ix)
1180 newprio += coro->prio; 1331 newprio = coro->prio - newprio;
1181 1332
1182 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1333 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1334 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184 1335
1185 coro->prio = newprio; 1336 coro->prio = newprio;
1186 } 1337 }
1187} 1338}
1339 OUTPUT:
1340 RETVAL
1188 1341
1189void 1342SV *
1190ready (SV *self) 1343ready (SV *self)
1191 PROTOTYPE: $ 1344 PROTOTYPE: $
1192 CODE: 1345 CODE:
1193 api_ready (self); 1346 RETVAL = boolSV (api_ready (self));
1347 OUTPUT:
1348 RETVAL
1349
1350SV *
1351is_ready (SV *self)
1352 PROTOTYPE: $
1353 CODE:
1354 RETVAL = boolSV (api_is_ready (self));
1355 OUTPUT:
1356 RETVAL
1194 1357
1195int 1358int
1196nready (...) 1359nready (...)
1197 PROTOTYPE: 1360 PROTOTYPE:
1198 CODE: 1361 CODE:
… …
1204 1367
1205SV * 1368SV *
1206_get_state () 1369_get_state ()
1207 CODE: 1370 CODE:
1208{ 1371{
1209 struct { 1372 struct io_state *data;
1210 int errorno;
1211 int laststype;
1212 int laststatval;
1213 Stat_t statcache;
1214 } data;
1215 1373
1374 RETVAL = newSV (sizeof (struct io_state));
1375 data = (struct io_state *)SvPVX (RETVAL);
1376 SvCUR_set (RETVAL, sizeof (struct io_state));
1377 SvPOK_only (RETVAL);
1378
1216 data.errorno = errno; 1379 data->errorno = errno;
1217 data.laststype = PL_laststype; 1380 data->laststype = PL_laststype;
1218 data.laststatval = PL_laststatval; 1381 data->laststatval = PL_laststatval;
1219 data.statcache = PL_statcache; 1382 data->statcache = PL_statcache;
1220
1221 RETVAL = newSVpvn ((char *)&data, sizeof data);
1222} 1383}
1223 OUTPUT: 1384 OUTPUT:
1224 RETVAL 1385 RETVAL
1225 1386
1226void 1387void
1227_set_state (char *data_) 1388_set_state (char *data_)
1228 PROTOTYPE: $ 1389 PROTOTYPE: $
1229 CODE: 1390 CODE:
1230{ 1391{
1231 struct { 1392 struct io_state *data = (void *)data_;
1232 int errorno;
1233 int laststype;
1234 int laststatval;
1235 Stat_t statcache;
1236 } *data = (void *)data_;
1237 1393
1238 errno = data->errorno; 1394 errno = data->errorno;
1239 PL_laststype = data->laststype; 1395 PL_laststype = data->laststype;
1240 PL_laststatval = data->laststatval; 1396 PL_laststatval = data->laststatval;
1241 PL_statcache = data->statcache; 1397 PL_statcache = data->statcache;
1242} 1398}
1399

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