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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 1.137 by root, Sun Jan 14 20:47:53 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 <stdio.h> 70/* 5.8.7 */
33#include <errno.h> 71#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
34 74
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 76# undef STACKGUARD
37#endif 77#endif
38 78
39#ifndef STACKGUARD 79#ifndef STACKGUARD
40# define STACKGUARD 0 80# define STACKGUARD 0
41#endif 81#endif
42 82
43#ifdef HAVE_MMAP 83/* prefer perl internal functions over our own? */
44# include <unistd.h> 84#ifndef PREFER_PERL_FUNCTIONS
45# include <sys/mman.h> 85# 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 86#endif
62 87
63/* 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
64 * 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
65 * and should be unique. */ 90 * and should be unique. */
66#define dSTACKLEVEL int stacklevel 91#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 92#define STACKLEVEL ((void *)&stacklevel)
68 93
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 95
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))
105
71#include "CoroAPI.h" 106#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74 107
75#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 109static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else 112#else
80# define LOCK (void)0 113# define LOCK (void)0
81# define UNLOCK (void)0 114# define UNLOCK (void)0
82#endif 115#endif
83 116
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
84static struct CoroAPI coroapi; 126static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 127static AV *main_mainstack; /* used to differentiate between $main and others */
86static HV *coro_state_stash, *coro_stash; 128static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 129static SV *coro_mortal; /* will be freed after next transfer */
88 130
131static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle;
133
89/* this is a structure representing a c-level coroutine */ 134/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 135typedef struct coro_cctx {
91 struct coro_stack *next; 136 struct coro_cctx *next;
92 137
93 /* the stack */ 138 /* the stack */
94 void *sptr; 139 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 140 long ssize; /* positive == mmap, otherwise malloc */
96 141
97 /* cpu state */ 142 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 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 */
99 JMPENV *top_env; 145 JMPENV *top_env;
100 coro_context cctx; 146 coro_context cctx;
101} coro_stack;
102 147
103/* the (fake) coro_stack representing the main program */ 148 int inuse;
104static coro_stack *main_stack; 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};
105 161
106/* this is a structure representing a perl-level coroutine */ 162/* this is a structure representing a perl-level coroutine */
107struct coro { 163struct coro {
108 /* the c coroutine allocated to this perl coroutine, if any */ 164 /* the c coroutine allocated to this perl coroutine, if any */
109 coro_stack *stack; 165 coro_cctx *cctx;
110 166
111 /* data associated with this coroutine (initial args) */ 167 /* data associated with this coroutine (initial args) */
112 AV *args; 168 AV *args;
113 int refcnt; 169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */
114 172
115 /* optionally saved, might be zero */ 173 /* optionally saved, might be zero */
116 AV *defav; 174 AV *defav; /* @_ */
117 SV *defsv; 175 SV *defsv; /* $_ */
118 SV *errsv; 176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
119 179
120 /* saved global state not related to stacks */ 180#define VAR(name,type) type name;
121 U8 dowarn; 181# include "state.h"
122 I32 in_eval; 182#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;
153 183
154 /* coro process data */ 184 /* coro process data */
155 int prio; 185 int prio;
156}; 186};
157 187
158typedef struct coro *Coro__State; 188typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 189typedef struct coro *Coro__State_or_hashref;
160 190
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
161static AV * 207static AV *
162coro_clone_padlist (pTHX_ CV *cv) 208coro_clone_padlist (CV *cv)
163{ 209{
164 AV *padlist = CvPADLIST (cv); 210 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 211 AV *newpadlist, *newpad;
166 212
167 newpadlist = newAV (); 213 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 214 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 215#if PERL_VERSION_ATLEAST (5,9,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 219#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 221 --AvFILLp (padlist);
176 222
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
179 225
180 return newpadlist; 226 return newpadlist;
181} 227}
182 228
183static void 229static void
184free_padlist (pTHX_ AV *padlist) 230free_padlist (AV *padlist)
185{ 231{
186 /* may be during global destruction */ 232 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 233 if (SvREFCNT (padlist))
188 { 234 {
189 I32 i = AvFILLp (padlist); 235 I32 i = AvFILLp (padlist);
… …
210 AV *padlist; 256 AV *padlist;
211 AV *av = (AV *)mg->mg_obj; 257 AV *av = (AV *)mg->mg_obj;
212 258
213 /* casting is fun. */ 259 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 261 free_padlist (padlist);
216 262
217 SvREFCNT_dec (av); 263 SvREFCNT_dec (av);
218 264
219 return 0; 265 return 0;
220} 266}
221 267
222#define PERL_MAGIC_coro PERL_MAGIC_ext 268#define PERL_MAGIC_coro PERL_MAGIC_ext
223 269
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225 271
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
226/* the next two functions merely cache the padlists */ 279/* the next two functions merely cache the padlists */
227static void 280static void
228get_padlist (pTHX_ CV *cv) 281get_padlist (CV *cv)
229{ 282{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 283 MAGIC *mg = CORO_MAGIC (cv);
284 AV *av;
231 285
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 288 else
235 { 289 {
236#if 0 290#if PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 291 /* this is probably cleaner, but also slower? */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 292 CV *cp = Perl_cv_clone (cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 293 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 294 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 295 SvREFCNT_dec (cp);
242#else 296#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 297 CvPADLIST (cv) = coro_clone_padlist (cv);
244#endif 298#endif
245 } 299 }
246} 300}
247 301
248static void 302static void
249put_padlist (pTHX_ CV *cv) 303put_padlist (CV *cv)
250{ 304{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 305 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av;
252 307
253 if (!mg) 308 if (!mg)
254 { 309 {
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro; 312 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV (); 313 mg->mg_obj = (SV *)newAV ();
259 } 314 }
260 315
261 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);
262} 322}
323
324/** load & save, init *******************************************************/
263 325
264#define SB do { 326#define SB do {
265#define SE } while (0) 327#define SE } while (0)
266 328
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 329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
271 330
272static void 331static void
273load_state(pTHX_ Coro__State c) 332load_perl (Coro__State c)
274{ 333{
275 PL_dowarn = c->dowarn; 334#define VAR(name,type) PL_ ## name = c->name;
276 PL_in_eval = c->in_eval; 335# include "state.h"
277 336#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;
308 337
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} 428}
436 429
437/* 430/*
438 * allocate various perl stacks. This is an exact copy 431 * allocate various perl stacks. This is an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 432 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 433 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 434 * not usually need a lot of stackspace.
442 */ 435 */
436#if PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks
438#else
443static void 439static void
444coro_init_stacks (pTHX) 440coro_init_stacks ()
445{ 441{
446 LOCK;
447
448 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
449 PL_curstackinfo->si_type = PERLSI_MAIN; 443 PL_curstackinfo->si_type = PERLSI_MAIN;
450 PL_curstack = PL_curstackinfo->si_stack; 444 PL_curstack = PL_curstackinfo->si_stack;
451 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452 446
453 PL_stack_base = AvARRAY(PL_curstack); 447 PL_stack_base = AvARRAY(PL_curstack);
454 PL_stack_sp = PL_stack_base; 448 PL_stack_sp = PL_stack_base;
455 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456 450
457 New(50,PL_tmps_stack,96,SV*); 451 New(50,PL_tmps_stack,128,SV*);
458 PL_tmps_floor = -1; 452 PL_tmps_floor = -1;
459 PL_tmps_ix = -1; 453 PL_tmps_ix = -1;
460 PL_tmps_max = 96; 454 PL_tmps_max = 128;
461 455
462 New(54,PL_markstack,16,I32); 456 New(54,PL_markstack,32,I32);
463 PL_markstack_ptr = PL_markstack; 457 PL_markstack_ptr = PL_markstack;
464 PL_markstack_max = PL_markstack + 16; 458 PL_markstack_max = PL_markstack + 32;
465 459
466#ifdef SET_MARK_OFFSET 460#ifdef SET_MARK_OFFSET
467 SET_MARK_OFFSET; 461 SET_MARK_OFFSET;
468#endif 462#endif
469 463
470 New(54,PL_scopestack,16,I32); 464 New(54,PL_scopestack,32,I32);
471 PL_scopestack_ix = 0; 465 PL_scopestack_ix = 0;
472 PL_scopestack_max = 16; 466 PL_scopestack_max = 32;
473 467
474 New(54,PL_savestack,96,ANY); 468 New(54,PL_savestack,64,ANY);
475 PL_savestack_ix = 0; 469 PL_savestack_ix = 0;
476 PL_savestack_max = 96; 470 PL_savestack_max = 64;
477 471
478#if PERL_VERSION < 9 472#if !PERL_VERSION_ATLEAST (5,9,0)
479 New(54,PL_retstack,8,OP*); 473 New(54,PL_retstack,16,OP*);
480 PL_retstack_ix = 0; 474 PL_retstack_ix = 0;
481 PL_retstack_max = 8; 475 PL_retstack_max = 16;
482#endif 476#endif
483
484 UNLOCK;
485} 477}
478#endif
486 479
487/* 480/*
488 * destroy the stacks, the callchain etc... 481 * destroy the stacks, the callchain etc...
489 */ 482 */
490static void 483static void
491destroy_stacks(pTHX) 484coro_destroy_stacks ()
492{ 485{
493 if (!IN_DESTRUCT) 486 if (!IN_DESTRUCT)
494 { 487 {
495 /* is this ugly, I ask? */ 488 /* restore all saved variables and stuff */
496 LEAVE_SCOPE (0); 489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
497 491
498 /* sure it is, but more important: is it correct?? :/ */ 492 /* free all temporaries */
499 FREETMPS; 493 FREETMPS;
494 assert (PL_tmps_ix == -1);
500 495
496 /* unwind all extra stacks */
501 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
502 } 501 }
503 502
504 while (PL_curstackinfo->si_next) 503 while (PL_curstackinfo->si_next)
505 PL_curstackinfo = PL_curstackinfo->si_next; 504 PL_curstackinfo = PL_curstackinfo->si_next;
506 505
507 while (PL_curstackinfo) 506 while (PL_curstackinfo)
508 { 507 {
509 PERL_SI *p = PL_curstackinfo->si_prev; 508 PERL_SI *p = PL_curstackinfo->si_prev;
510 509
511 { /*D*//*remove*/
512 dSP;
513 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514 PUTBACK; /* possibly superfluous */
515 }
516
517 if (!IN_DESTRUCT) 510 if (!IN_DESTRUCT)
518 {
519 dounwind (-1);/*D*//*remove*/
520 SvREFCNT_dec (PL_curstackinfo->si_stack); 511 SvREFCNT_dec (PL_curstackinfo->si_stack);
521 }
522 512
523 Safefree (PL_curstackinfo->si_cxstack); 513 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree (PL_curstackinfo); 514 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 515 PL_curstackinfo = p;
526 } 516 }
527 517
528 Safefree (PL_tmps_stack); 518 Safefree (PL_tmps_stack);
529 Safefree (PL_markstack); 519 Safefree (PL_markstack);
530 Safefree (PL_scopestack); 520 Safefree (PL_scopestack);
531 Safefree (PL_savestack); 521 Safefree (PL_savestack);
532#if PERL_VERSION < 9 522#if !PERL_VERSION_ATLEAST (5,9,0)
533 Safefree (PL_retstack); 523 Safefree (PL_retstack);
534#endif 524#endif
535} 525}
526
527/** coroutine stack handling ************************************************/
536 528
537static void 529static void
538setup_coro (struct coro *coro) 530setup_coro (struct coro *coro)
539{ 531{
540 /* 532 /*
541 * emulate part of the perl startup here. 533 * emulate part of the perl startup here.
542 */ 534 */
543 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{
544 dSP; 581 dSP;
545 UNOP myop; 582 LOGOP myop;
546 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547 583
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); 584 Zero (&myop, 1, LOGOP);
557 myop.op_next = Nullop; 585 myop.op_next = PL_op;
558 myop.op_flags = OPf_WANT_VOID; 586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559 587
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;
560 PL_op = (OP *)&myop; 593 PL_op = (OP *)&myop;
561
562 PUSHMARK(SP);
563 XPUSHs (sub_init);
564 PUTBACK;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566 SPAGAIN; 595 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} 596}
580 597
581static void 598static void
582coro_run (void *arg) 599coro_run (void *arg)
583{ 600{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK;
603
584 /* 604 /*
585 * this is a _very_ stripped down perl interpreter ;) 605 * this is a _very_ stripped down perl interpreter ;)
586 */ 606 */
587 dTHX;
588 int ret;
589
590 UNLOCK;
591
592 PL_top_env = &PL_start_env; 607 PL_top_env = &PL_start_env;
593 608
594 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 609 /* inject call to cctx_init */
595 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 610 prepare_cctx ((coro_cctx *)arg);
596
597 /* continue at cctx_init, without entersub */
598 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599 611
600 /* somebody will hit me for both perl_run and PL_restartop */ 612 /* somebody will hit me for both perl_run and PL_restartop */
601 ret = perl_run (aTHX_ PERL_GET_CONTEXT); 613 PL_restartop = PL_op;
602 printf ("ret %d\n", ret);//D 614 perl_run (PL_curinterp);
603 615
604 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
605 abort (); 617 abort ();
606} 618}
607 619
608static coro_stack * 620static coro_cctx *
609stack_new () 621cctx_new ()
610{ 622{
611 coro_stack *stack; 623 coro_cctx *cctx;
612 624
625 ++cctx_count;
626
613 New (0, stack, 1, coro_stack); 627 Newz (0, cctx, 1, coro_cctx);
614 628
615#if HAVE_MMAP 629#if HAVE_MMAP
616 630
617 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
618 /* mmap suppsedly does allocate-on-write for us */ 632 /* 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); 633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620 634
621 if (stack->sptr == (void *)-1) 635 if (cctx->sptr == (void *)-1)
622 { 636 {
623 perror ("FATAL: unable to mmap stack for coroutine"); 637 perror ("FATAL: unable to mmap stack for coroutine");
624 _exit (EXIT_FAILURE); 638 _exit (EXIT_FAILURE);
625 } 639 }
626 640
627# if STACKGUARD 641# if STACKGUARD
628 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629# endif 643# endif
630 644
631#else 645#else
632 646
633 stack->ssize = STACKSIZE * (long)sizeof (long); 647 cctx->ssize = STACKSIZE * (long)sizeof (long);
634 New (0, stack->sptr, STACKSIZE, long); 648 New (0, cctx->sptr, STACKSIZE, long);
635 649
636 if (!stack->sptr) 650 if (!cctx->sptr)
637 { 651 {
638 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 652 perror ("FATAL: unable to malloc stack for coroutine");
639 _exit (EXIT_FAILURE); 653 _exit (EXIT_FAILURE);
640 } 654 }
641 655
642#endif 656#endif
643 657
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
644 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
645 666
646 return stack; 667 return cctx;
647} 668}
648 669
649static void 670static void
650stack_free (coro_stack *stack) 671cctx_destroy (coro_cctx *cctx)
651{ 672{
652 if (!stack || stack == main_stack) 673 if (!cctx)
653 return; 674 return;
654 675
676 --cctx_count;
677
678#if USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif
681
655#if HAVE_MMAP 682#if HAVE_MMAP
656 munmap (stack->sptr, stack->ssize); 683 munmap (cctx->sptr, cctx->ssize);
657#else 684#else
658 Safefree (stack->sptr); 685 Safefree (cctx->sptr);
659#endif 686#endif
660 687
661 Safefree (stack); 688 Safefree (cctx);
662} 689}
663 690
664static coro_stack *stack_first;
665
666static coro_stack * 691static coro_cctx *
667stack_get () 692cctx_get ()
668{ 693{
669 coro_stack *stack; 694 coro_cctx *cctx;
670 695
671 if (stack_first) 696 if (cctx_first)
672 { 697 {
673 stack = stack_first; 698 cctx = cctx_first;
674 stack_first = stack->next; 699 cctx_first = cctx->next;
700 --cctx_idle;
675 } 701 }
676 else 702 else
677 { 703 {
678 stack = stack_new (); 704 cctx = cctx_new ();
679 PL_op = PL_op->op_next; 705 PL_op = PL_op->op_next;
680 } 706 }
681 707
682 return stack; 708 return cctx;
683} 709}
684 710
685static void 711static void
686stack_put (coro_stack *stack) 712cctx_put (coro_cctx *cctx)
687{ 713{
688 stack->next = stack_first; 714 /* free another cctx if overlimit */
689 stack_first = stack; 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;
690} 728}
729
730/** coroutine switching *****************************************************/
691 731
692/* never call directly, always through the coro_state_transfer global variable */ 732/* never call directly, always through the coro_state_transfer global variable */
693static void 733static void NOINLINE
694transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 734transfer (struct coro *prev, struct coro *next)
695{ 735{
696 dSTACKLEVEL; 736 dSTACKLEVEL;
697 737
698 /* sometimes transfer is only called to set idle_sp */ 738 /* sometimes transfer is only called to set idle_sp */
699 if (flags == TRANSFER_SET_STACKLEVEL) 739 if (!next)
740 {
700 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 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 }
701 else if (prev != next) 744 else if (prev != next)
702 { 745 {
703 coro_stack *prev__stack; 746 coro_cctx *prev__cctx;
747
748 if (prev->flags & CF_NEW)
749 {
750 /* create a new empty context */
751 Newz (0, prev->cctx, 1, coro_cctx);
752 prev->cctx->inuse = 1;
753 prev->flags &= ~CF_NEW;
754 prev->flags |= CF_RUNNING;
755 }
756
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;
704 769
705 LOCK; 770 LOCK;
706 771
707 if (next->mainstack) 772 if (next->flags & CF_NEW)
708 { 773 {
709 /* coroutine already started */ 774 /* need to start coroutine */
710 SAVE (prev, flags); 775 next->flags &= ~CF_NEW;
711 LOAD (next); 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);
712 } 782 }
713 else 783 else
714 { 784 {
715 /* need to start coroutine */ 785 /* coroutine already started */
716 /* first get rid of the old state */ 786 save_perl (prev);
717 SAVE (prev, -1); 787 load_perl (next);
718 /* setup coroutine call */
719 setup_coro (next);
720 /* need a stack */
721 next->stack = 0;
722 } 788 }
723 789
724 prev__stack = prev->stack; 790 prev__cctx = prev->cctx;
725 791
726 /* possibly "free" the stack */ 792 /* possibly "free" the cctx */
727 if (prev__stack->idle_sp == STACKLEVEL) 793 if (prev__cctx->idle_sp == STACKLEVEL)
728 { 794 {
729 stack_put (prev__stack); 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
730 prev->stack = 0; 798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
731 } 802 }
732 803
733 if (!next->stack) 804 if (!next->cctx)
734 next->stack = stack_get ();
735
736 if (prev__stack != next->stack)
737 { 805 {
738 prev__stack->top_env = PL_top_env; 806 next->cctx = cctx_get ();
739 PL_top_env = next->stack->top_env; 807 assert (!next->cctx->inuse);
740 printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D 808 next->cctx->inuse = 1;
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 } 809 }
743 810
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
744 free_coro_mortal (); 818 free_coro_mortal ();
745
746 UNLOCK; 819 UNLOCK;
747 } 820 }
748} 821}
749 822
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 823struct transfer_args
756{ 824{
757 struct coro *prev, *next; 825 struct coro *prev, *next;
758 int flags;
759}; 826};
760 827
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags) 828#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
762 829
830/** high level stuff ********************************************************/
831
763static void 832static int
764coro_state_destroy (struct coro *coro) 833coro_state_destroy (struct coro *coro)
765{ 834{
766 if (coro->refcnt--) 835 if (coro->flags & CF_DESTROYED)
767 return; 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 it */
844 LOCK;
845 --coro_nready;
846 UNLOCK;
847 }
848 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768 850
769 if (coro->mainstack && coro->mainstack != main_mainstack) 851 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 852 {
853 assert (!(coro->flags & CF_RUNNING));
854
771 struct coro temp; 855 struct coro temp;
856 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL;
772 858
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 859 if (coro->flags & CF_RUNNING)
774 LOAD (aTHX_ coro); 860 croak ("FATAL: tried to destroy currently running coroutine");
775 861
862 save_perl (&temp);
863 load_perl (coro);
864
776 destroy_stacks (aTHX); 865 coro_destroy_stacks ();
777 866
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 867 load_perl (&temp); /* this will get rid of defsv etc.. */
779 868
780 coro->mainstack = 0; 869 coro->mainstack = 0;
781 } 870 }
782 871
783 stack_free (coro->stack); 872 cctx_destroy (coro->cctx);
784 SvREFCNT_dec (coro->args); 873 SvREFCNT_dec (coro->args);
785 Safefree (coro); 874
875 return 1;
786} 876}
787 877
788static int 878static int
789coro_state_clear (SV *sv, MAGIC *mg) 879coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790{ 880{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 881 struct coro *coro = (struct coro *)mg->mg_ptr;
792 mg->mg_ptr = 0; 882 mg->mg_ptr = 0;
793 883
884 if (--coro->refcnt < 0)
885 {
794 coro_state_destroy (coro); 886 coro_state_destroy (coro);
887 Safefree (coro);
888 }
795 889
796 return 0; 890 return 0;
797} 891}
798 892
799static int 893static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 894coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801{ 895{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 896 struct coro *coro = (struct coro *)mg->mg_ptr;
803 897
804 ++coro->refcnt; 898 ++coro->refcnt;
805 899
806 return 0; 900 return 0;
807} 901}
808 902
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 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};
810 913
811static struct coro * 914static struct coro *
812SvSTATE (SV *coro) 915SvSTATE (SV *coro)
813{ 916{
814 HV *stash; 917 HV *stash;
… …
829 assert (mg->mg_type == PERL_MAGIC_ext); 932 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr; 933 return (struct coro *)mg->mg_ptr;
831} 934}
832 935
833static void 936static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835{ 938{
836 ta->prev = SvSTATE (prev); 939 ta->prev = SvSTATE (prev_sv);
837 ta->next = SvSTATE (next); 940 ta->next = SvSTATE (next_sv);
838 ta->flags = flags;
839} 941}
840 942
841static void 943static void
842api_transfer (SV *prev, SV *next, int flags) 944api_transfer (SV *prev_sv, SV *next_sv)
843{ 945{
844 dTHX;
845 struct transfer_args ta; 946 struct transfer_args ta;
846 947
847 prepare_transfer (aTHX_ &ta, prev, next, flags); 948 prepare_transfer (&ta, prev_sv, next_sv);
848 TRANSFER (ta); 949 TRANSFER (ta);
849} 950}
850 951
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;
962}
963
851/** Coro ********************************************************************/ 964/** Coro ********************************************************************/
852 965
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 966static void
866coro_enq (pTHX_ SV *sv) 967coro_enq (SV *coro_sv)
867{ 968{
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); 969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876 coro_nready++;
877} 970}
878 971
879static SV * 972static SV *
880coro_deq (pTHX_ int min_prio) 973coro_deq (int min_prio)
881{ 974{
882 int prio = PRIO_MAX - PRIO_MIN; 975 int prio = PRIO_MAX - PRIO_MIN;
883 976
884 min_prio -= PRIO_MIN; 977 min_prio -= PRIO_MIN;
885 if (min_prio < 0) 978 if (min_prio < 0)
886 min_prio = 0; 979 min_prio = 0;
887 980
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 981 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0) 982 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]); 983 return av_shift (coro_ready [prio]);
893 }
894 984
895 return 0; 985 return 0;
896} 986}
897 987
898static void 988static int
899api_ready (SV *coro) 989api_ready (SV *coro_sv)
900{ 990{
901 dTHX; 991 struct coro *coro;
902 992
903 if (SvROK (coro)) 993 if (SvROK (coro_sv))
904 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;
905 1002
906 LOCK; 1003 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1004 coro_enq (SvREFCNT_inc (coro_sv));
1005 ++coro_nready;
908 UNLOCK; 1006 UNLOCK;
909}
910 1007
1008 return 1;
1009}
1010
911static void 1011static int
1012api_is_ready (SV *coro_sv)
1013{
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015}
1016
1017static void
912prepare_schedule (aTHX_ struct transfer_args *ta) 1018prepare_schedule (struct transfer_args *ta)
913{ 1019{
914 SV *current, *prev, *next; 1020 SV *prev_sv, *next_sv;
1021
1022 for (;;)
1023 {
1024 LOCK;
1025 next_sv = coro_deq (PRIO_MIN);
1026 UNLOCK;
1027
1028 /* nothing to schedule: call the idle handler */
1029 if (!next_sv)
1030 {
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 SvREFCNT_dec (next_sv);
1051 /* coro_nready is already taken care of by destroy */
1052 continue;
1053 }
1054
1055 LOCK;
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;
915 1068
916 LOCK; 1069 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 (); 1070 free_coro_mortal ();
951 coro_mortal = prev; 1071 coro_mortal = prev_sv;
952
953 ta->prev = SvSTATE (prev);
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956
957 UNLOCK; 1072 UNLOCK;
958} 1073}
959 1074
960static void 1075static void
961prepare_cede (aTHX_ struct transfer_args *ta) 1076prepare_cede (struct transfer_args *ta)
962{ 1077{
963 LOCK; 1078 api_ready (coro_current);
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 prepare_schedule (ta); 1079 prepare_schedule (ta);
968} 1080}
969 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;
1094}
1095
970static void 1096static void
971api_schedule (void) 1097api_schedule (void)
972{ 1098{
973 dTHX;
974 struct transfer_args ta; 1099 struct transfer_args ta;
975 1100
976 prepare_schedule (&ta); 1101 prepare_schedule (&ta);
977 TRANSFER (ta); 1102 TRANSFER (ta);
978} 1103}
979 1104
980static void 1105static int
981api_cede (void) 1106api_cede (void)
982{ 1107{
983 dTHX;
984 struct transfer_args ta; 1108 struct transfer_args ta;
985 1109
986 prepare_cede (&ta); 1110 prepare_cede (&ta);
1111
1112 if (ta.prev != ta.next)
1113 {
987 TRANSFER (ta); 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;
988} 1133}
989 1134
990MODULE = Coro::State PACKAGE = Coro::State 1135MODULE = Coro::State PACKAGE = Coro::State
991 1136
992PROTOTYPES: DISABLE 1137PROTOTYPES: DISABLE
… …
998#endif 1143#endif
999 BOOT_PAGESIZE; 1144 BOOT_PAGESIZE;
1000 1145
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1146 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 1147
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005 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));
1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006 1153
1007 main_mainstack = PL_mainstack; 1154 main_mainstack = PL_mainstack;
1008 1155
1009 coroapi.ver = CORO_API_VERSION; 1156 coroapi.ver = CORO_API_VERSION;
1010 coroapi.transfer = api_transfer; 1157 coroapi.transfer = api_transfer;
1011
1012 Newz (0, main_stack, 1, coro_stack);
1013 main_stack->idle_sp = (void *)-1;
1014 1158
1015 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016} 1160}
1017 1161
1018SV * 1162SV *
… …
1023 HV *hv; 1167 HV *hv;
1024 int i; 1168 int i;
1025 1169
1026 Newz (0, coro, 1, struct coro); 1170 Newz (0, coro, 1, struct coro);
1027 coro->args = newAV (); 1171 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL;
1173 coro->flags = CF_NEW;
1028 1174
1029 hv = newHV (); 1175 hv = newHV ();
1030 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1176 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)); 1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032 1178
1033 for (i = 1; i < items; i++) 1179 for (i = 1; i < items; i++)
1034 av_push (coro->args, newSVsv (ST (i))); 1180 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} 1181}
1040 OUTPUT: 1182 OUTPUT:
1183 RETVAL
1184
1185int
1186save (SV *coro, int new_save = -1)
1187 CODE:
1188 RETVAL = api_save (coro, new_save);
1189 OUTPUT:
1041 RETVAL 1190 RETVAL
1042 1191
1043void 1192void
1044_set_stacklevel (...) 1193_set_stacklevel (...)
1045 ALIAS: 1194 ALIAS:
1046 Coro::State::transfer = 1 1195 Coro::State::transfer = 1
1047 Coro::schedule = 2 1196 Coro::schedule = 2
1048 Coro::cede = 3 1197 Coro::cede = 3
1049 Coro::Cont::yield = 4 1198 Coro::cede_notself = 4
1050 CODE: 1199 CODE:
1051{ 1200{
1052 struct transfer_args ta; 1201 struct transfer_args ta;
1053 1202
1054 switch (ix) 1203 switch (ix)
1055 { 1204 {
1056 case 0: 1205 case 0:
1057 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1206 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058 ta.next = 0; 1207 ta.next = 0;
1059 ta.flags = TRANSFER_SET_STACKLEVEL;
1060 break; 1208 break;
1061 1209
1062 case 1: 1210 case 1:
1063 if (items != 3) 1211 if (items != 2)
1064 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065 1213
1066 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1214 prepare_transfer (&ta, ST (0), ST (1));
1067 break; 1215 break;
1068 1216
1069 case 2: 1217 case 2:
1070 prepare_schedule (&ta); 1218 prepare_schedule (&ta);
1071 break; 1219 break;
… …
1073 case 3: 1221 case 3:
1074 prepare_cede (&ta); 1222 prepare_cede (&ta);
1075 break; 1223 break;
1076 1224
1077 case 4: 1225 case 4:
1078 { 1226 if (!prepare_cede_notself (&ta))
1079 SV *yieldstack; 1227 XSRETURN_EMPTY;
1080 SV *sv;
1081 AV *defav = GvAV (PL_defgv);
1082 1228
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; 1229 break;
1102
1103 } 1230 }
1104 1231
1232 BARRIER;
1105 TRANSFER (ta); 1233 TRANSFER (ta);
1106}
1107 1234
1108void 1235 if (GIMME_V != G_VOID && ta.next != ta.prev)
1109_clone_state_from (SV *dst, SV *src) 1236 XSRETURN_YES;
1237}
1238
1239bool
1240_destroy (SV *coro_sv)
1110 CODE: 1241 CODE:
1111{ 1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1112 struct coro *coro_src = SvSTATE (src); 1243 OUTPUT:
1113 1244 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 1245
1126void 1246void
1127_exit (code) 1247_exit (code)
1128 int code 1248 int code
1129 PROTOTYPE: $ 1249 PROTOTYPE: $
1130 CODE: 1250 CODE:
1131 _exit (code); 1251 _exit (code);
1132 1252
1253int
1254cctx_count ()
1255 CODE:
1256 RETVAL = cctx_count;
1257 OUTPUT:
1258 RETVAL
1259
1260int
1261cctx_idle ()
1262 CODE:
1263 RETVAL = cctx_idle;
1264 OUTPUT:
1265 RETVAL
1266
1133MODULE = Coro::State PACKAGE = Coro 1267MODULE = Coro::State PACKAGE = Coro
1134 1268
1135BOOT: 1269BOOT:
1136{ 1270{
1137 int i; 1271 int i;
… …
1143 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1277 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1278 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1279 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1280 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147 1281
1148 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1282 coro_current = get_sv ("Coro::current", FALSE);
1149 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1283 SvREADONLY_on (coro_current);
1150 1284
1151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1285 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152 coro_ready[i] = newAV (); 1286 coro_ready[i] = newAV ();
1153 1287
1154 { 1288 {
1155 SV *sv = perl_get_sv("Coro::API", 1); 1289 SV *sv = perl_get_sv("Coro::API", 1);
1156 1290
1157 coroapi.schedule = api_schedule; 1291 coroapi.schedule = api_schedule;
1292 coroapi.save = api_save;
1158 coroapi.cede = api_cede; 1293 coroapi.cede = api_cede;
1294 coroapi.cede_notself = api_cede_notself;
1159 coroapi.ready = api_ready; 1295 coroapi.ready = api_ready;
1296 coroapi.is_ready = api_is_ready;
1160 coroapi.nready = &coro_nready; 1297 coroapi.nready = &coro_nready;
1161 coroapi.current = coro_current; 1298 coroapi.current = coro_current;
1162 1299
1163 GCoroAPI = &coroapi; 1300 GCoroAPI = &coroapi;
1164 sv_setiv (sv, (IV)&coroapi); 1301 sv_setiv (sv, (IV)&coroapi);
1165 SvREADONLY_on (sv); 1302 SvREADONLY_on (sv);
1166 } 1303 }
1167} 1304}
1305
1306void
1307_set_current (SV *current)
1308 PROTOTYPE: $
1309 CODE:
1310 SvREFCNT_dec (SvRV (coro_current));
1311 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168 1312
1169int 1313int
1170prio (Coro::State coro, int newprio = 0) 1314prio (Coro::State coro, int newprio = 0)
1171 ALIAS: 1315 ALIAS:
1172 nice = 1 1316 nice = 1
… …
1175 RETVAL = coro->prio; 1319 RETVAL = coro->prio;
1176 1320
1177 if (items > 1) 1321 if (items > 1)
1178 { 1322 {
1179 if (ix) 1323 if (ix)
1180 newprio += coro->prio; 1324 newprio = coro->prio - newprio;
1181 1325
1182 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1326 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1327 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184 1328
1185 coro->prio = newprio; 1329 coro->prio = newprio;
1186 } 1330 }
1187} 1331}
1332 OUTPUT:
1333 RETVAL
1188 1334
1189void 1335SV *
1190ready (SV *self) 1336ready (SV *self)
1191 PROTOTYPE: $ 1337 PROTOTYPE: $
1192 CODE: 1338 CODE:
1193 api_ready (self); 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
1194 1350
1195int 1351int
1196nready (...) 1352nready (...)
1197 PROTOTYPE: 1353 PROTOTYPE:
1198 CODE: 1354 CODE:
… …
1204 1360
1205SV * 1361SV *
1206_get_state () 1362_get_state ()
1207 CODE: 1363 CODE:
1208{ 1364{
1209 struct { 1365 struct io_state *data;
1210 int errorno;
1211 int laststype;
1212 int laststatval;
1213 Stat_t statcache;
1214 } data;
1215 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
1216 data.errorno = errno; 1372 data->errorno = errno;
1217 data.laststype = PL_laststype; 1373 data->laststype = PL_laststype;
1218 data.laststatval = PL_laststatval; 1374 data->laststatval = PL_laststatval;
1219 data.statcache = PL_statcache; 1375 data->statcache = PL_statcache;
1220
1221 RETVAL = newSVpvn ((char *)&data, sizeof data);
1222} 1376}
1223 OUTPUT: 1377 OUTPUT:
1224 RETVAL 1378 RETVAL
1225 1379
1226void 1380void
1227_set_state (char *data_) 1381_set_state (char *data_)
1228 PROTOTYPE: $ 1382 PROTOTYPE: $
1229 CODE: 1383 CODE:
1230{ 1384{
1231 struct { 1385 struct io_state *data = (void *)data_;
1232 int errorno;
1233 int laststype;
1234 int laststatval;
1235 Stat_t statcache;
1236 } *data = (void *)data_;
1237 1386
1238 errno = data->errorno; 1387 errno = data->errorno;
1239 PL_laststype = data->laststype; 1388 PL_laststype = data->laststype;
1240 PL_laststatval = data->laststatval; 1389 PL_laststatval = data->laststatval;
1241 PL_statcache = data->statcache; 1390 PL_statcache = data->statcache;
1242} 1391}
1392

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