ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 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 <errno.h> 70/* 5.8.7 */
71#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
33 74
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 76# undef STACKGUARD
36#endif 77#endif
37 78
38#ifndef STACKGUARD 79#ifndef STACKGUARD
39# define STACKGUARD 0 80# define STACKGUARD 0
40#endif 81#endif
41 82
42#ifdef HAVE_MMAP 83/* prefer perl internal functions over our own? */
43# include <unistd.h> 84#ifndef PREFER_PERL_FUNCTIONS
44# include <sys/mman.h> 85# define PREFER_PERL_FUNCTIONS 0
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif 86#endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64 87
65/* The next macro should declare a variable stacklevel that contains and approximation 88/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call 89 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */ 90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
68#define dSTACKLEVEL void *stacklevel = &stacklevel 92#define STACKLEVEL ((void *)&stacklevel)
69 93
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
71 95
72#define labs(l) ((l) >= 0 ? (l) : -(l)) 96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory")
99#else
100# define attribute(x)
101# define BARRIER
102#endif
103
104#define NOINLINE attribute ((noinline))
73 105
74#include "CoroAPI.h" 106#include "CoroAPI.h"
75 107
76#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
77static perl_mutex coro_mutex; 109static perl_mutex coro_mutex;
… …
80#else 112#else
81# define LOCK (void)0 113# define LOCK (void)0
82# define UNLOCK (void)0 114# define UNLOCK (void)0
83#endif 115#endif
84 116
117/* helper storage struct for Coro::AIO */
118struct io_state
119{
120 int errorno;
121 I32 laststype;
122 int laststatval;
123 Stat_t statcache;
124};
125
85static struct CoroAPI coroapi; 126static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 127static AV *main_mainstack; /* used to differentiate between $main and others */
87static HV *coro_state_stash; 128static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 129static SV *coro_mortal; /* will be freed after next transfer */
91 130
92/* this is actually not only the c stack but also c registers etc... */ 131static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle;
133
134/* this is a structure representing a c-level coroutine */
93typedef struct { 135typedef struct coro_cctx {
94 int refcnt; /* pointer reference counter */ 136 struct coro_cctx *next;
95 int usecnt; /* shared by how many coroutines */
96 int gencnt; /* generation counter */
97 137
98 coro_context cctx; 138 /* the stack */
99
100 void *sptr; 139 void *sptr;
101 long ssize; /* positive == mmap, otherwise malloc */ 140 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103 141
142 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env;
146 coro_context cctx;
147
148 int inuse;
149
150#if USE_VALGRIND
151 int valgrind_id;
152#endif
153} coro_cctx;
154
155enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160};
161
162/* this is a structure representing a perl-level coroutine */
104struct coro { 163struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 164 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 165 coro_cctx *cctx;
107
108 /* the optional C context */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack;
126 SV **stack_sp;
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 166
153 /* data associated with this coroutine (initial args) */ 167 /* data associated with this coroutine (initial args) */
154 AV *args; 168 AV *args;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */
172
173 /* optionally saved, might be zero */
174 AV *defav; /* @_ */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name;
181# include "state.h"
182#undef VAR
183
184 /* coro process data */
185 int prio;
155}; 186};
156 187
157typedef struct coro *Coro__State; 188typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 189typedef struct coro *Coro__State_or_hashref;
159 190
191/** Coro ********************************************************************/
192
193#define PRIO_MAX 3
194#define PRIO_HIGH 1
195#define PRIO_NORMAL 0
196#define PRIO_LOW -1
197#define PRIO_IDLE -3
198#define PRIO_MIN -4
199
200/* for Coro.pm */
201static SV *coro_current;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
203static int coro_nready;
204
205/** lowlevel stuff **********************************************************/
206
160static AV * 207static AV *
161coro_clone_padlist (pTHX_ CV *cv) 208coro_clone_padlist (CV *cv)
162{ 209{
163 AV *padlist = CvPADLIST (cv); 210 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 211 AV *newpadlist, *newpad;
165 212
166 newpadlist = newAV (); 213 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 214 AvREAL_off (newpadlist);
215#if PERL_VERSION_ATLEAST (5,9,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 221 --AvFILLp (padlist);
171 222
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 224 av_store (newpadlist, 1, (SV *)newpad);
174 225
175 return newpadlist; 226 return newpadlist;
176} 227}
177 228
178static void 229static void
179free_padlist (pTHX_ AV *padlist) 230free_padlist (AV *padlist)
180{ 231{
181 /* may be during global destruction */ 232 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 233 if (SvREFCNT (padlist))
183 { 234 {
184 I32 i = AvFILLp (padlist); 235 I32 i = AvFILLp (padlist);
… …
205 AV *padlist; 256 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 257 AV *av = (AV *)mg->mg_obj;
207 258
208 /* casting is fun. */ 259 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (aTHX_ padlist); 261 free_padlist (padlist);
211 262
212 SvREFCNT_dec (av); 263 SvREFCNT_dec (av);
213 264
214 return 0; 265 return 0;
215} 266}
216 267
217#define PERL_MAGIC_coro PERL_MAGIC_ext 268#define PERL_MAGIC_coro PERL_MAGIC_ext
218 269
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220 271
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
221/* the next two functions merely cache the padlists */ 279/* the next two functions merely cache the padlists */
222static void 280static void
223get_padlist (pTHX_ CV *cv) 281get_padlist (CV *cv)
224{ 282{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 283 MAGIC *mg = CORO_MAGIC (cv);
284 AV *av;
226 285
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 288 else
230 { 289 {
231#if 0 290#if PREFER_PERL_FUNCTIONS
232 /* this should work - but it doesn't :( */ 291 /* this is probably cleaner, but also slower? */
233 CV *cp = Perl_cv_clone (aTHX_ cv); 292 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 293 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 294 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 295 SvREFCNT_dec (cp);
237#else 296#else
238 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 297 CvPADLIST (cv) = coro_clone_padlist (cv);
239#endif 298#endif
240 } 299 }
241} 300}
242 301
243static void 302static void
244put_padlist (pTHX_ CV *cv) 303put_padlist (CV *cv)
245{ 304{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 305 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av;
247 307
248 if (!mg) 308 if (!mg)
249 { 309 {
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro; 312 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV (); 313 mg->mg_obj = (SV *)newAV ();
254 } 314 }
255 315
256 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);
257} 322}
323
324/** load & save, init *******************************************************/
258 325
259#define SB do { 326#define SB do {
260#define SE } while (0) 327#define SE } while (0)
261 328
262#define LOAD(state) load_state(aTHX_ (state));
263#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
264
265#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
266 330
267static void 331static void
268load_state(pTHX_ Coro__State c) 332load_perl (Coro__State c)
269{ 333{
270 PL_dowarn = c->dowarn; 334#define VAR(name,type) PL_ ## name = c->name;
271 PL_in_eval = c->in_eval; 335# include "state.h"
272 336#undef VAR
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 PL_top_env = c->top_env;
304 337
305 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
306 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
307 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 }
308 352
309 { 353 {
310 dSP; 354 dSP;
311 CV *cv; 355 CV *cv;
312 356
313 /* now do the ugly restore mess */ 357 /* now do the ugly restore mess */
314 while ((cv = (CV *)POPs)) 358 while ((cv = (CV *)POPs))
315 { 359 {
316 AV *padlist = (AV *)POPs;
317
318 if (padlist)
319 {
320 put_padlist (aTHX_ cv); /* mark this padlist as available */ 360 put_padlist (cv); /* mark this padlist as available */
321 CvPADLIST(cv) = padlist; 361 CvDEPTH (cv) = PTR2IV (POPs);
322 } 362 CvPADLIST (cv) = (AV *)POPs;
323
324 ++CvDEPTH(cv);
325 } 363 }
326 364
327 PUTBACK; 365 PUTBACK;
328 } 366 }
329} 367}
330 368
331static void 369static void
332save_state(pTHX_ Coro__State c, int flags) 370save_perl (Coro__State c)
333{ 371{
334 { 372 {
335 dSP; 373 dSP;
336 I32 cxix = cxstack_ix; 374 I32 cxix = cxstack_ix;
337 PERL_CONTEXT *ccstk = cxstack; 375 PERL_CONTEXT *ccstk = cxstack;
… …
340 /* 378 /*
341 * 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
342 * (and reinitialize) all cv's in the whole callchain :( 380 * (and reinitialize) all cv's in the whole callchain :(
343 */ 381 */
344 382
383 EXTEND (SP, 3 + 1);
345 PUSHs (Nullsv); 384 PUSHs (Nullsv);
346 /* this loop was inspired by pp_caller */ 385 /* this loop was inspired by pp_caller */
347 for (;;) 386 for (;;)
348 { 387 {
349 while (cxix >= 0) 388 while (cxix >= 0)
350 { 389 {
351 PERL_CONTEXT *cx = &ccstk[cxix--]; 390 PERL_CONTEXT *cx = &ccstk[cxix--];
352 391
353 if (CxTYPE(cx) == CXt_SUB) 392 if (CxTYPE (cx) == CXt_SUB)
354 { 393 {
355 CV *cv = cx->blk_sub.cv; 394 CV *cv = cx->blk_sub.cv;
395
356 if (CvDEPTH(cv)) 396 if (CvDEPTH (cv))
357 { 397 {
358 EXTEND (SP, CvDEPTH(cv)*2); 398 EXTEND (SP, 3);
359
360 while (--CvDEPTH(cv))
361 {
362 /* this tells the restore code to increment CvDEPTH */
363 PUSHs (Nullsv);
364 PUSHs ((SV *)cv);
365 }
366
367 PUSHs ((SV *)CvPADLIST(cv)); 399 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
368 PUSHs ((SV *)cv); 401 PUSHs ((SV *)cv);
369 402
403 CvDEPTH (cv) = 0;
370 get_padlist (aTHX_ cv); 404 get_padlist (cv);
371 } 405 }
372 } 406 }
373#ifdef CXt_FORMAT
374 else if (CxTYPE(cx) == CXt_FORMAT)
375 {
376 /* I never used formats, so how should I know how these are implemented? */
377 /* my bold guess is as a simple, plain sub... */
378 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379 }
380#endif
381 } 407 }
382 408
383 if (top_si->si_type == PERLSI_MAIN) 409 if (top_si->si_type == PERLSI_MAIN)
384 break; 410 break;
385 411
… …
389 } 415 }
390 416
391 PUTBACK; 417 PUTBACK;
392 } 418 }
393 419
394 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;
395 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
396 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;
397 424
398 c->dowarn = PL_dowarn; 425#define VAR(name,type)c->name = PL_ ## name;
399 c->in_eval = PL_in_eval; 426# include "state.h"
400 427#undef VAR
401 c->curstackinfo = PL_curstackinfo;
402 c->curstack = PL_curstack;
403 c->mainstack = PL_mainstack;
404 c->stack_sp = PL_stack_sp;
405 c->op = PL_op;
406 c->curpad = PL_curpad;
407 c->comppad = PL_comppad;
408 c->compcv = PL_compcv;
409 c->stack_base = PL_stack_base;
410 c->stack_max = PL_stack_max;
411 c->tmps_stack = PL_tmps_stack;
412 c->tmps_floor = PL_tmps_floor;
413 c->tmps_ix = PL_tmps_ix;
414 c->tmps_max = PL_tmps_max;
415 c->markstack = PL_markstack;
416 c->markstack_ptr = PL_markstack_ptr;
417 c->markstack_max = PL_markstack_max;
418 c->scopestack = PL_scopestack;
419 c->scopestack_ix = PL_scopestack_ix;
420 c->scopestack_max = PL_scopestack_max;
421 c->savestack = PL_savestack;
422 c->savestack_ix = PL_savestack_ix;
423 c->savestack_max = PL_savestack_max;
424#if PERL_VERSION < 9
425 c->retstack = PL_retstack;
426 c->retstack_ix = PL_retstack_ix;
427 c->retstack_max = PL_retstack_max;
428#endif
429 c->curpm = PL_curpm;
430 c->curcop = PL_curcop;
431 c->top_env = PL_top_env;
432} 428}
433 429
434/* 430/*
435 * allocate various perl stacks. This is an exact copy 431 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 432 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 433 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 434 * not usually need a lot of stackspace.
439 */ 435 */
436#if PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks
438#else
440static void 439static void
441coro_init_stacks (pTHX) 440coro_init_stacks ()
442{ 441{
443 LOCK;
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446 PL_curstackinfo->si_type = PERLSI_MAIN; 443 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 444 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 446
450 PL_stack_base = AvARRAY(PL_curstack); 447 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 448 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 450
454 New(50,PL_tmps_stack,96,SV*); 451 New(50,PL_tmps_stack,128,SV*);
455 PL_tmps_floor = -1; 452 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 453 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 454 PL_tmps_max = 128;
458 455
459 New(54,PL_markstack,16,I32); 456 New(54,PL_markstack,32,I32);
460 PL_markstack_ptr = PL_markstack; 457 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 458 PL_markstack_max = PL_markstack + 32;
462 459
463#ifdef SET_MARK_OFFSET 460#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 461 SET_MARK_OFFSET;
465#endif 462#endif
466 463
467 New(54,PL_scopestack,16,I32); 464 New(54,PL_scopestack,32,I32);
468 PL_scopestack_ix = 0; 465 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 466 PL_scopestack_max = 32;
470 467
471 New(54,PL_savestack,96,ANY); 468 New(54,PL_savestack,64,ANY);
472 PL_savestack_ix = 0; 469 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 470 PL_savestack_max = 64;
474 471
475#if PERL_VERSION < 9 472#if !PERL_VERSION_ATLEAST (5,9,0)
476 New(54,PL_retstack,8,OP*); 473 New(54,PL_retstack,16,OP*);
477 PL_retstack_ix = 0; 474 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 475 PL_retstack_max = 16;
479#endif 476#endif
480
481 UNLOCK;
482} 477}
478#endif
483 479
484/* 480/*
485 * destroy the stacks, the callchain etc... 481 * destroy the stacks, the callchain etc...
486 */ 482 */
487static void 483static void
488destroy_stacks(pTHX) 484coro_destroy_stacks ()
489{ 485{
490 if (!IN_DESTRUCT) 486 if (!IN_DESTRUCT)
491 { 487 {
492 /* is this ugly, I ask? */ 488 /* restore all saved variables and stuff */
493 LEAVE_SCOPE (0); 489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
494 491
495 /* sure it is, but more important: is it correct?? :/ */ 492 /* free all temporaries */
496 FREETMPS; 493 FREETMPS;
494 assert (PL_tmps_ix == -1);
497 495
496 /* unwind all extra stacks */
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
499 } 501 }
500 502
501 while (PL_curstackinfo->si_next) 503 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 504 PL_curstackinfo = PL_curstackinfo->si_next;
503 505
504 while (PL_curstackinfo) 506 while (PL_curstackinfo)
505 { 507 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 508 PERL_SI *p = PL_curstackinfo->si_prev;
507 509
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 510 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 511 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 512
520 Safefree (PL_curstackinfo->si_cxstack); 513 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 514 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 515 PL_curstackinfo = p;
523 } 516 }
524 517
525 Safefree (PL_tmps_stack); 518 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 519 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 520 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 521 Safefree (PL_savestack);
529#if PERL_VERSION < 9 522#if !PERL_VERSION_ATLEAST (5,9,0)
530 Safefree (PL_retstack); 523 Safefree (PL_retstack);
531#endif 524#endif
532} 525}
533 526
534static void 527/** coroutine stack handling ************************************************/
535allocate_stack (Coro__State ctx, int alloc)
536{
537 coro_stack *stack;
538 528
539 New (0, stack, 1, coro_stack);
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544
545 if (alloc)
546 {
547#if HAVE_MMAP
548 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
550 if (stack->sptr != (void *)-1)
551 {
552# if STACKGUARD
553 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
554# endif
555 }
556 else
557#endif
558 {
559 stack->ssize = - (STACKSIZE * (long)sizeof (long));
560 New (0, stack->sptr, STACKSIZE, long);
561 }
562 }
563 else
564 stack->sptr = 0;
565
566 ctx->stack = stack;
567}
568
569static void 529static void
570deallocate_stack (Coro__State ctx) 530setup_coro (struct coro *coro)
571{
572 coro_stack *stack = ctx->stack;
573
574 ctx->stack = 0;
575
576 if (stack)
577 {
578 if (!--stack->refcnt)
579 {
580#ifdef HAVE_MMAP
581 if (stack->ssize > 0 && stack->sptr)
582 munmap (stack->sptr, stack->ssize);
583 else
584#endif
585 Safefree (stack->sptr);
586
587 Safefree (stack);
588 }
589 else if (ctx->gencnt == stack->gencnt)
590 --stack->usecnt;
591 }
592}
593
594static void
595setup_coro (void *arg)
596{ 531{
597 /* 532 /*
598 * emulate part of the perl startup here. 533 * emulate part of the perl startup here.
599 */ 534 */
600 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{
601 dSP; 581 dSP;
602 Coro__State ctx = (Coro__State)arg; 582 LOGOP myop;
603 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604 583
605 coro_init_stacks (aTHX); 584 Zero (&myop, 1, LOGOP);
606 /*PL_curcop = 0;*/ 585 myop.op_next = PL_op;
607 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608 SvREFCNT_dec (GvAV (PL_defgv));
609 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
610 587
588 PUSHMARK (SP);
589 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK;
593 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611 SPAGAIN; 595 SPAGAIN;
612
613 if (ctx->stack)
614 {
615 ctx->cursp = 0;
616
617 PUSHMARK(SP);
618 PUTBACK;
619 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
620
621 if (SvTRUE (ERRSV))
622 croak (NULL);
623 else
624 croak ("FATAL: CCTXT coroutine returned!");
625 }
626 else
627 {
628 UNOP myop;
629
630 PL_op = (OP *)&myop;
631
632 Zero(&myop, 1, UNOP);
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 }
651} 596}
652 597
653static void 598static void
654continue_coro (void *arg) 599coro_run (void *arg)
655{ 600{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK;
603
656 /* 604 /*
657 * this is a _very_ stripped down perl interpreter ;) 605 * this is a _very_ stripped down perl interpreter ;)
658 */ 606 */
659 dTHX;
660 Coro__State ctx = (Coro__State)arg;
661
662 PL_top_env = &ctx->start_env; 607 PL_top_env = &PL_start_env;
663 608
664 ctx->cursp = 0; 609 /* inject call to cctx_init */
665 PL_op = PL_op->op_next; 610 prepare_cctx ((coro_cctx *)arg);
666 CALLRUNOPS(aTHX);
667 611
612 /* somebody will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op;
614 perl_run (PL_curinterp);
615
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
668 abort (); 617 abort ();
669} 618}
670 619
620static coro_cctx *
621cctx_new ()
622{
623 coro_cctx *cctx;
624
625 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx);
628
629#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634
635 if (cctx->sptr == (void *)-1)
636 {
637 perror ("FATAL: unable to mmap stack for coroutine");
638 _exit (EXIT_FAILURE);
639 }
640
641# if STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
643# endif
644
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 {
652 perror ("FATAL: unable to malloc stack for coroutine");
653 _exit (EXIT_FAILURE);
654 }
655
656#endif
657
658#if USE_VALGRIND
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666
667 return cctx;
668}
669
671static void 670static void
671cctx_destroy (coro_cctx *cctx)
672{
673 if (!cctx)
674 return;
675
676 --cctx_count;
677
678#if USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif
681
682#if HAVE_MMAP
683 munmap (cctx->sptr, cctx->ssize);
684#else
685 Safefree (cctx->sptr);
686#endif
687
688 Safefree (cctx);
689}
690
691static coro_cctx *
692cctx_get ()
693{
694 coro_cctx *cctx;
695
696 if (cctx_first)
697 {
698 cctx = cctx_first;
699 cctx_first = cctx->next;
700 --cctx_idle;
701 }
702 else
703 {
704 cctx = cctx_new ();
705 PL_op = PL_op->op_next;
706 }
707
708 return cctx;
709}
710
711static void
712cctx_put (coro_cctx *cctx)
713{
714 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX)
716 {
717 coro_cctx *first = cctx_first;
718 cctx_first = first->next;
719 --cctx_idle;
720
721 assert (!first->inuse);
722 cctx_destroy (first);
723 }
724
725 ++cctx_idle;
726 cctx->next = cctx_first;
727 cctx_first = cctx;
728}
729
730/** coroutine switching *****************************************************/
731
732/* never call directly, always through the coro_state_transfer global variable */
733static void NOINLINE
672transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 734transfer (struct coro *prev, struct coro *next)
673{ 735{
674 dSTACKLEVEL; 736 dSTACKLEVEL;
675 737
738 /* sometimes transfer is only called to set idle_sp */
739 if (!next)
740 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 }
676 if (prev != next) 744 else if (prev != next)
677 { 745 {
678 if (next->mainstack) 746 coro_cctx *prev__cctx;
747
748 if (prev->flags & CF_NEW)
679 { 749 {
680 LOCK; 750 /* create a new empty context */
681 SAVE (prev, flags); 751 Newz (0, prev->cctx, 1, coro_cctx);
682 LOAD (next); 752 prev->cctx->inuse = 1;
683 UNLOCK; 753 prev->flags &= ~CF_NEW;
684 754 prev->flags |= CF_RUNNING;
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 {
692 if (!prev->stack)
693 allocate_stack (prev, 0);
694 else if (prev->cursp != stacklevel
695 && prev->stack->usecnt > 1)
696 {
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 prev->cursp = stacklevel;
713 /* don't add any code here */
714 }
715 else
716 next->cursp = stacklevel;
717 } 755 }
718 else if (next->tmps_ix == -2) 756
719 croak ("tried to transfer to running coroutine"); 757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING;
769
770 LOCK;
771
772 if (next->flags & CF_NEW)
773 {
774 /* need to start coroutine */
775 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */
779 setup_coro (next);
780 /* need a new stack */
781 assert (!next->cctx);
782 }
720 else 783 else
721 { 784 {
722 LOCK; 785 /* coroutine already started */
723 SAVE (prev, -1); /* first get rid of the old state */ 786 save_perl (prev);
724 UNLOCK; 787 load_perl (next);
725
726 if (flags & TRANSFER_SAVE_CCTXT)
727 {
728 if (!prev->stack)
729 allocate_stack (prev, 0);
730
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 {
733 PL_top_env = &next->start_env;
734
735 setup_coro (next);
736 next->cursp = stacklevel;
737
738 prev->stack->refcnt++;
739 prev->stack->usecnt++;
740 next->stack = prev->stack;
741 next->gencnt = prev->gencnt;
742 }
743 else
744 {
745 assert (!next->stack);
746 allocate_stack (next, 1);
747 coro_create (&(next->stack->cctx),
748 setup_coro, (void *)next,
749 next->stack->sptr, labs (next->stack->ssize));
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 }
754 }
755 else
756 {
757 setup_coro (next);
758 next->cursp = stacklevel;
759 }
760 } 788 }
761 }
762 789
763 LOCK; 790 prev__cctx = prev->cctx;
764 if (coro_mortal) 791
765 { 792 /* possibly "free" the cctx */
766 SvREFCNT_dec (coro_mortal); 793 if (prev__cctx->idle_sp == STACKLEVEL)
794 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 }
803
804 if (!next->cctx)
805 {
806 next->cctx = cctx_get ();
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810
811 if (prev__cctx != next->cctx)
812 {
813 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 }
817
767 coro_mortal = 0; 818 free_coro_mortal ();
768 }
769 UNLOCK; 819 UNLOCK;
820 }
770} 821}
771 822
772#define SV_CORO(sv,func) \ 823struct transfer_args
773 do { \ 824{
774 if (SvROK (sv)) \ 825 struct coro *prev, *next;
775 sv = SvRV (sv); \ 826};
776 \
777 if (SvTYPE (sv) == SVt_PVHV) \
778 { \
779 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780 \
781 if (!he) \
782 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783 \
784 (sv) = SvRV (HeVAL(he)); \
785 } \
786 \
787 /* must also be changed inside Coro::Cont::yield */ \
788 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790 \
791 } while(0)
792 827
793#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 828#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
794 829
830/** high level stuff ********************************************************/
831
795static void 832static int
833coro_state_destroy (struct coro *coro)
834{
835 if (coro->flags & CF_DESTROYED)
836 return 0;
837
838 coro->flags |= CF_DESTROYED;
839
840 if (coro->flags & CF_READY)
841 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove 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 */
850
851 if (coro->mainstack && coro->mainstack != main_mainstack)
852 {
853 assert (!(coro->flags & CF_RUNNING));
854
855 struct coro temp;
856 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL;
858
859 if (coro->flags & CF_RUNNING)
860 croak ("FATAL: tried to destroy currently running coroutine");
861
862 save_perl (&temp);
863 load_perl (coro);
864
865 coro_destroy_stacks ();
866
867 load_perl (&temp); /* this will get rid of defsv etc.. */
868
869 coro->mainstack = 0;
870 }
871
872 cctx_destroy (coro->cctx);
873 SvREFCNT_dec (coro->args);
874
875 return 1;
876}
877
878static int
879coro_state_free (pTHX_ SV *sv, MAGIC *mg)
880{
881 struct coro *coro = (struct coro *)mg->mg_ptr;
882 mg->mg_ptr = 0;
883
884 if (--coro->refcnt < 0)
885 {
886 coro_state_destroy (coro);
887 Safefree (coro);
888 }
889
890 return 0;
891}
892
893static int
894coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
895{
896 struct coro *coro = (struct coro *)mg->mg_ptr;
897
898 ++coro->refcnt;
899
900 return 0;
901}
902
903static MGVTBL coro_state_vtbl = {
904 0, 0, 0, 0,
905 coro_state_free,
906 0,
907#ifdef MGf_DUP
908 coro_state_dup,
909#else
910# define MGf_DUP 0
911#endif
912};
913
914static struct coro *
915SvSTATE (SV *coro)
916{
917 HV *stash;
918 MAGIC *mg;
919
920 if (SvROK (coro))
921 coro = SvRV (coro);
922
923 stash = SvSTASH (coro);
924 if (stash != coro_stash && stash != coro_state_stash)
925 {
926 /* very slow, but rare, check */
927 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928 croak ("Coro::State object required");
929 }
930
931 mg = SvMAGIC (coro);
932 assert (mg->mg_type == PERL_MAGIC_ext);
933 return (struct coro *)mg->mg_ptr;
934}
935
936static void
937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
938{
939 ta->prev = SvSTATE (prev_sv);
940 ta->next = SvSTATE (next_sv);
941}
942
943static void
796api_transfer(pTHX_ SV *prev, SV *next, int flags) 944api_transfer (SV *prev_sv, SV *next_sv)
797{ 945{
798 SV_CORO (prev, "Coro::transfer"); 946 struct transfer_args ta;
799 SV_CORO (next, "Coro::transfer");
800 947
801 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 948 prepare_transfer (&ta, prev_sv, next_sv);
949 TRANSFER (ta);
950}
951
952static int
953api_save (SV *coro_sv, int new_save)
954{
955 struct coro *coro = SvSTATE (coro_sv);
956 int old_save = coro->save;
957
958 if (new_save >= 0)
959 coro->save = new_save;
960
961 return old_save;
802} 962}
803 963
804/** Coro ********************************************************************/ 964/** Coro ********************************************************************/
805 965
806#define PRIO_MAX 3
807#define PRIO_HIGH 1
808#define PRIO_NORMAL 0
809#define PRIO_LOW -1
810#define PRIO_IDLE -3
811#define PRIO_MIN -4
812
813/* for Coro.pm */
814static GV *coro_current, *coro_idle;
815static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
816static int coro_nready;
817
818static void 966static void
819coro_enq (pTHX_ SV *sv) 967coro_enq (SV *coro_sv)
820{ 968{
821 SV **xprio;
822 int prio;
823
824 if (SvTYPE (sv) != SVt_PVHV)
825 croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830 prio = prio > PRIO_MAX ? PRIO_MAX
831 : prio < PRIO_MIN ? PRIO_MIN
832 : prio;
833
834 av_push (coro_ready [prio - PRIO_MIN], sv); 969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
835 coro_nready++;
836} 970}
837 971
838static SV * 972static SV *
839coro_deq (pTHX_ int min_prio) 973coro_deq (int min_prio)
840{ 974{
841 int prio = PRIO_MAX - PRIO_MIN; 975 int prio = PRIO_MAX - PRIO_MIN;
842 976
843 min_prio -= PRIO_MIN; 977 min_prio -= PRIO_MIN;
844 if (min_prio < 0) 978 if (min_prio < 0)
845 min_prio = 0; 979 min_prio = 0;
846 980
847 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 981 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848 if (av_len (coro_ready[prio]) >= 0) 982 if (AvFILLp (coro_ready [prio]) >= 0)
849 {
850 coro_nready--;
851 return av_shift (coro_ready[prio]); 983 return av_shift (coro_ready [prio]);
852 }
853 984
854 return 0; 985 return 0;
855} 986}
856 987
857static void 988static int
858api_ready (SV *coro) 989api_ready (SV *coro_sv)
859{ 990{
860 dTHX; 991 struct coro *coro;
861 992
862 if (SvROK (coro)) 993 if (SvROK (coro_sv))
863 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;
864 1002
865 LOCK; 1003 LOCK;
866 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1004 coro_enq (SvREFCNT_inc (coro_sv));
1005 ++coro_nready;
867 UNLOCK; 1006 UNLOCK;
1007
1008 return 1;
1009}
1010
1011static int
1012api_is_ready (SV *coro_sv)
1013{
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015}
1016
1017static void
1018prepare_schedule (struct transfer_args *ta)
1019{
1020 SV *prev_sv, *next_sv;
1021
1022 for (;;)
1023 {
1024 LOCK;
1025 next_sv = coro_deq (PRIO_MIN);
1026 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;
1068
1069 LOCK;
1070 free_coro_mortal ();
1071 coro_mortal = prev_sv;
1072 UNLOCK;
1073}
1074
1075static void
1076prepare_cede (struct transfer_args *ta)
1077{
1078 api_ready (coro_current);
1079 prepare_schedule (ta);
1080}
1081
1082static int
1083prepare_cede_notself (struct transfer_args *ta)
1084{
1085 if (coro_nready)
1086 {
1087 SV *prev = SvRV (coro_current);
1088 prepare_schedule (ta);
1089 api_ready (prev);
1090 return 1;
1091 }
1092 else
1093 return 0;
868} 1094}
869 1095
870static void 1096static void
871api_schedule (void) 1097api_schedule (void)
872{ 1098{
873 dTHX; 1099 struct transfer_args ta;
874 1100
875 SV *prev, *next; 1101 prepare_schedule (&ta);
876 1102 TRANSFER (ta);
877 LOCK;
878
879 prev = SvRV (GvSV (coro_current));
880 next = coro_deq (aTHX_ PRIO_MIN);
881
882 if (!next)
883 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
884
885 /* free this only after the transfer */
886 coro_mortal = prev;
887 SV_CORO (prev, "Coro::schedule");
888
889 SvRV (GvSV (coro_current)) = next;
890
891 SV_CORO (next, "Coro::schedule");
892
893 UNLOCK;
894
895 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897} 1103}
898 1104
899static void 1105static int
900api_cede (void) 1106api_cede (void)
901{ 1107{
902 dTHX; 1108 struct transfer_args ta;
903 1109
904 LOCK; 1110 prepare_cede (&ta);
905 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
906 UNLOCK;
907 1111
908 api_schedule (); 1112 if (ta.prev != ta.next)
1113 {
1114 TRANSFER (ta);
1115 return 1;
1116 }
1117 else
1118 return 0;
1119}
1120
1121static int
1122api_cede_notself (void)
1123{
1124 struct transfer_args ta;
1125
1126 if (prepare_cede_notself (&ta))
1127 {
1128 TRANSFER (ta);
1129 return 1;
1130 }
1131 else
1132 return 0;
909} 1133}
910 1134
911MODULE = Coro::State PACKAGE = Coro::State 1135MODULE = Coro::State PACKAGE = Coro::State
912 1136
913PROTOTYPES: ENABLE 1137PROTOTYPES: DISABLE
914 1138
915BOOT: 1139BOOT:
916{ /* {} necessary for stoopid perl-5.6.x */ 1140{
917#ifdef USE_ITHREADS 1141#ifdef USE_ITHREADS
918 MUTEX_INIT (&coro_mutex); 1142 MUTEX_INIT (&coro_mutex);
919#endif 1143#endif
920 BOOT_PAGESIZE; 1144 BOOT_PAGESIZE;
921 1145
922 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
923 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
924 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1146 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925 1147
926 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
927 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
928 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));
929 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
930 1153
931 main_mainstack = PL_mainstack; 1154 main_mainstack = PL_mainstack;
932 1155
933 coroapi.ver = CORO_API_VERSION; 1156 coroapi.ver = CORO_API_VERSION;
934 coroapi.transfer = api_transfer; 1157 coroapi.transfer = api_transfer;
935}
936 1158
937Coro::State 1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
938_newprocess(args) 1160}
939 SV * args 1161
940 PROTOTYPE: $ 1162SV *
1163new (char *klass, ...)
941 CODE: 1164 CODE:
942 Coro__State coro; 1165{
1166 struct coro *coro;
1167 HV *hv;
1168 int i;
943 1169
944 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945 croak ("Coro::State::_newprocess expects an arrayref");
946
947 Newz (0, coro, 1, struct coro); 1170 Newz (0, coro, 1, struct coro);
1171 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL;
1173 coro->flags = CF_NEW;
948 1174
949 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1175 hv = newHV ();
950 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1176 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
951 /*coro->stack = 0;*/ 1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
952 1178
953 /* same as JMPENV_BOOTSTRAP */ 1179 for (i = 1; i < items; i++)
954 /* we might be able to recycle start_env, but safe is safe */ 1180 av_push (coro->args, newSVsv (ST (i)));
955 /*Zero(&coro->start_env, 1, JMPENV);*/ 1181}
956 coro->start_env.je_ret = -1;
957 coro->start_env.je_mustcatch = TRUE;
958
959 RETVAL = coro;
960 OUTPUT: 1182 OUTPUT:
961 RETVAL 1183 RETVAL
962 1184
1185int
1186save (SV *coro, int new_save = -1)
1187 CODE:
1188 RETVAL = api_save (coro, new_save);
1189 OUTPUT:
1190 RETVAL
1191
963void 1192void
964transfer(prev, next, flags) 1193_set_stacklevel (...)
965 SV *prev 1194 ALIAS:
966 SV *next 1195 Coro::State::transfer = 1
967 int flags 1196 Coro::schedule = 2
968 PROTOTYPE: @ 1197 Coro::cede = 3
1198 Coro::cede_notself = 4
969 CODE: 1199 CODE:
970 PUTBACK; 1200{
971 SV_CORO (next, "Coro::transfer"); 1201 struct transfer_args ta;
972 SV_CORO (prev, "Coro::transfer"); 1202
973 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1203 switch (ix)
974 SPAGAIN; 1204 {
1205 case 0:
1206 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1207 ta.next = 0;
1208 break;
1209
1210 case 1:
1211 if (items != 2)
1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213
1214 prepare_transfer (&ta, ST (0), ST (1));
1215 break;
1216
1217 case 2:
1218 prepare_schedule (&ta);
1219 break;
1220
1221 case 3:
1222 prepare_cede (&ta);
1223 break;
1224
1225 case 4:
1226 if (!prepare_cede_notself (&ta))
1227 XSRETURN_EMPTY;
1228
1229 break;
1230 }
1231
1232 BARRIER;
1233 TRANSFER (ta);
1234
1235 if (GIMME_V != G_VOID && ta.next != ta.prev)
1236 XSRETURN_YES;
1237}
1238
1239bool
1240_destroy (SV *coro_sv)
1241 CODE:
1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1243 OUTPUT:
1244 RETVAL
975 1245
976void 1246void
977DESTROY(coro)
978 Coro::State coro
979 CODE:
980
981 if (coro->mainstack && coro->mainstack != main_mainstack)
982 {
983 struct coro temp;
984
985 PUTBACK;
986 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
987 LOAD (aTHX_ coro);
988 SPAGAIN;
989
990 destroy_stacks (aTHX);
991
992 LOAD ((&temp)); /* this will get rid of defsv etc.. */
993 SPAGAIN;
994
995 coro->mainstack = 0;
996 }
997
998 deallocate_stack (coro);
999 SvREFCNT_dec (coro->args);
1000 Safefree (coro);
1001
1002void
1003_exit(code) 1247_exit (code)
1004 int code 1248 int code
1005 PROTOTYPE: $ 1249 PROTOTYPE: $
1006 CODE: 1250 CODE:
1007 _exit (code); 1251 _exit (code);
1008 1252
1009MODULE = Coro::State PACKAGE = Coro::Cont 1253int
1254cctx_count ()
1255 CODE:
1256 RETVAL = cctx_count;
1257 OUTPUT:
1258 RETVAL
1010 1259
1011# this is slightly dirty (should expose a c-level api) 1260int
1012 1261cctx_idle ()
1013void 1262 CODE:
1014yield(...) 1263 RETVAL = cctx_idle;
1015 PROTOTYPE: @ 1264 OUTPUT:
1016 CODE: 1265 RETVAL
1017 SV *yieldstack;
1018 SV *sv;
1019 AV *defav = GvAV (PL_defgv);
1020 struct coro *prev, *next;
1021
1022 yieldstack = *hv_fetch (
1023 (HV *)SvRV (GvSV (coro_current)),
1024 "yieldstack", sizeof ("yieldstack") - 1,
1025 0
1026 );
1027
1028 /* set up @_ -- ugly */
1029 av_clear (defav);
1030 av_fill (defav, items - 1);
1031 while (items--)
1032 av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034 sv = av_pop ((AV *)SvRV (yieldstack));
1035 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037 SvREFCNT_dec (sv);
1038
1039 transfer (aTHX_ prev, next, 0);
1040 1266
1041MODULE = Coro::State PACKAGE = Coro 1267MODULE = Coro::State PACKAGE = Coro
1042 1268
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 1269BOOT:
1046{ 1270{
1047 int i; 1271 int i;
1272
1048 HV *stash = gv_stashpv ("Coro", TRUE); 1273 coro_stash = gv_stashpv ("Coro", TRUE);
1049 1274
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1275 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1276 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1277 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1278 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1279 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1280 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056 1281
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1282 coro_current = get_sv ("Coro::current", FALSE);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1283 SvREADONLY_on (coro_current);
1059 1284
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1285 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 1286 coro_ready[i] = newAV ();
1062 1287
1063 { 1288 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 1289 SV *sv = perl_get_sv("Coro::API", 1);
1065 1290
1066 coroapi.schedule = api_schedule; 1291 coroapi.schedule = api_schedule;
1292 coroapi.save = api_save;
1067 coroapi.cede = api_cede; 1293 coroapi.cede = api_cede;
1294 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 1295 coroapi.ready = api_ready;
1296 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 1297 coroapi.nready = &coro_nready;
1070 coroapi.current = coro_current; 1298 coroapi.current = coro_current;
1071 1299
1072 GCoroAPI = &coroapi; 1300 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 1301 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 1302 SvREADONLY_on (sv);
1075 } 1303 }
1076} 1304}
1077 1305
1078#if !PERL_MICRO
1079
1080void 1306void
1081ready(self) 1307_set_current (SV *current)
1082 SV * self
1083 PROTOTYPE: $ 1308 PROTOTYPE: $
1084 CODE: 1309 CODE:
1085 api_ready (self); 1310 SvREFCNT_dec (SvRV (coro_current));
1086 1311 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087#endif
1088 1312
1089int 1313int
1314prio (Coro::State coro, int newprio = 0)
1315 ALIAS:
1316 nice = 1
1317 CODE:
1318{
1319 RETVAL = coro->prio;
1320
1321 if (items > 1)
1322 {
1323 if (ix)
1324 newprio = coro->prio - newprio;
1325
1326 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1327 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1328
1329 coro->prio = newprio;
1330 }
1331}
1332 OUTPUT:
1333 RETVAL
1334
1335SV *
1336ready (SV *self)
1337 PROTOTYPE: $
1338 CODE:
1339 RETVAL = boolSV (api_ready (self));
1340 OUTPUT:
1341 RETVAL
1342
1343SV *
1344is_ready (SV *self)
1345 PROTOTYPE: $
1346 CODE:
1347 RETVAL = boolSV (api_is_ready (self));
1348 OUTPUT:
1349 RETVAL
1350
1351int
1090nready(...) 1352nready (...)
1091 PROTOTYPE: 1353 PROTOTYPE:
1092 CODE: 1354 CODE:
1093 RETVAL = coro_nready; 1355 RETVAL = coro_nready;
1094 OUTPUT: 1356 OUTPUT:
1095 RETVAL 1357 RETVAL
1096 1358
1097void 1359MODULE = Coro::State PACKAGE = Coro::AIO
1098schedule(...) 1360
1099 PROTOTYPE: 1361SV *
1362_get_state ()
1100 CODE: 1363 CODE:
1101 api_schedule ();
1102
1103void
1104cede(...)
1105 PROTOTYPE:
1106 CODE:
1107 api_cede ();
1108
1109# and these are hacks
1110SV *
1111_aio_get_state ()
1112 CODE:
1113{ 1364{
1114 struct { 1365 struct io_state *data;
1115 int errorno;
1116 int laststype;
1117 int laststatval;
1118 Stat_t statcache;
1119 } data;
1120 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
1121 data.errorno = errno; 1372 data->errorno = errno;
1122 data.laststype = PL_laststype; 1373 data->laststype = PL_laststype;
1123 data.laststatval = PL_laststatval; 1374 data->laststatval = PL_laststatval;
1124 data.statcache = PL_statcache; 1375 data->statcache = PL_statcache;
1125
1126 RETVAL = newSVpvn ((char *)&data, sizeof data);
1127} 1376}
1128 OUTPUT: 1377 OUTPUT:
1129 RETVAL 1378 RETVAL
1130 1379
1131void 1380void
1132_aio_set_state (char *data_) 1381_set_state (char *data_)
1133 PROTOTYPE: $ 1382 PROTOTYPE: $
1134 CODE: 1383 CODE:
1135{ 1384{
1136 struct { 1385 struct io_state *data = (void *)data_;
1137 int errorno;
1138 int laststype;
1139 int laststatval;
1140 Stat_t statcache;
1141 } *data = (void *)data_;
1142 1386
1143 errno = data->errorno; 1387 errno = data->errorno;
1144 PL_laststype = data->laststype; 1388 PL_laststype = data->laststype;
1145 PL_laststatval = data->laststatval; 1389 PL_laststatval = data->laststatval;
1146 PL_statcache = data->statcache; 1390 PL_statcache = data->statcache;
1147} 1391}
1392

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines