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Comparing Coro/Coro/State.xs (file contents):
Revision 1.56 by pcg, Thu Apr 1 02:41:05 2004 UTC vs.
Revision 1.141 by root, Mon Jan 22 18:45:17 2007 UTC

1#define PERL_NO_GET_CONTEXT 1#include "libcoro/coro.c"
2 2
3#include "EXTERN.h" 3#include "EXTERN.h"
4#include "perl.h" 4#include "perl.h"
5#include "XSUB.h" 5#include "XSUB.h"
6 6
7#include "patchlevel.h" 7#include "patchlevel.h"
8 8
9#if PATCHLEVEL < 6 9#include <stdio.h>
10#include <errno.h>
11#include <assert.h>
12
13#ifdef HAVE_MMAP
14# include <unistd.h>
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif
22# endif
23# include <limits.h>
24# ifndef PAGESIZE
25# define PAGESIZE pagesize
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
27static long pagesize;
28# else
29# define BOOT_PAGESIZE (void)0
30# endif
31#else
32# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0
34#endif
35
36#if USE_VALGRIND
37# include <valgrind/valgrind.h>
38# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39#else
40# define REGISTER_STACK(cctx,start,end)
41#endif
42
43/* the maximum number of idle cctx that will be pooled */
44#define MAX_IDLE_CCTX 8
45
46#define PERL_VERSION_ATLEAST(a,b,c) \
47 (PERL_REVISION > (a) \
48 || (PERL_REVISION == (a) \
49 && (PERL_VERSION > (b) \
50 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
51
52#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 53# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 54# define PL_ppaddr ppaddr
12# endif 55# endif
13# ifndef call_sv 56# ifndef call_sv
14# define call_sv perl_call_sv 57# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 68# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 69# define IS_PADCONST(v) 0
27# endif 70# endif
28#endif 71#endif
29 72
30#include "libcoro/coro.c" 73/* 5.8.7 */
31 74#ifndef SvRV_set
32#include <signal.h> 75# define SvRV_set(s,v) SvRV(s) = (v)
33
34#ifdef HAVE_MMAP
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif
43# endif 76#endif
44#endif
45 77
46#define SUB_INIT "Coro::State::initialize" 78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47#define UCORO_STATE "_coro_state" 79# undef STACKGUARD
80#endif
81
82#ifndef STACKGUARD
83# define STACKGUARD 0
84#endif
85
86/* prefer perl internal functions over our own? */
87#ifndef PREFER_PERL_FUNCTIONS
88# define PREFER_PERL_FUNCTIONS 0
89#endif
48 90
49/* The next macro should declare a variable stacklevel that contains and approximation 91/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call 92 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */ 93 * and should be unique. */
94#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 95#define STACKLEVEL ((void *)&stacklevel)
53 96
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 97#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 98
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 99#if __GNUC__ >= 3
100# define attribute(x) __attribute__(x)
101# define BARRIER __asm__ __volatile__ ("" : : : "memory")
102#else
103# define attribute(x)
104# define BARRIER
105#endif
106
107#define NOINLINE attribute ((noinline))
57 108
58#include "CoroAPI.h" 109#include "CoroAPI.h"
59 110
60#ifdef USE_ITHREADS 111#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 112static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 115#else
65# define LOCK 0 116# define LOCK (void)0
66# define UNLOCK 0 117# define UNLOCK (void)0
67#endif 118#endif
119
120/* helper storage struct for Coro::AIO */
121struct io_state
122{
123 int errorno;
124 I32 laststype;
125 int laststatval;
126 Stat_t statcache;
127};
68 128
69static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 131static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static __thread SV *coro_mortal; /* will be freed after next transfer */ 132static SV *coro_mortal; /* will be freed after next transfer */
75 133
76/* this is actually not only the c stack but also c registers etc... */ 134static struct coro_cctx *cctx_first;
135static int cctx_count, cctx_idle;
136
137/* this is a structure representing a c-level coroutine */
77typedef struct { 138typedef struct coro_cctx {
78 int refcnt; /* pointer reference counter */ 139 struct coro_cctx *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 140
141 /* the stack */
142 void *sptr;
143 ssize_t ssize; /* positive == mmap, otherwise malloc */
144
145 /* cpu state */
146 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148 JMPENV *top_env;
82 coro_context cctx; 149 coro_context cctx;
83 150
84 void *sptr; 151 int inuse;
85 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87 152
153#if USE_VALGRIND
154 int valgrind_id;
155#endif
156} coro_cctx;
157
158enum {
159 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */
162 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163};
164
165/* this is a structure representing a perl-level coroutine */
88struct coro { 166struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 167 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 168 coro_cctx *cctx;
91
92 /* the optional C context */
93 coro_stack *stack;
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack;
110 SV **stack_sp;
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 169
135 /* data associated with this coroutine (initial args) */ 170 /* data associated with this coroutine (initial args) */
136 AV *args; 171 AV *args;
172 int refcnt;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */
175
176 /* optionally saved, might be zero */
177 AV *defav; /* @_ */
178 SV *defsv; /* $_ */
179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
182
183#define VAR(name,type) type name;
184# include "state.h"
185#undef VAR
186
187 /* coro process data */
188 int prio;
137}; 189};
138 190
139typedef struct coro *Coro__State; 191typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 192typedef struct coro *Coro__State_or_hashref;
141 193
142/* mostly copied from op.c:cv_clone2 */ 194/** Coro ********************************************************************/
143STATIC AV * 195
144clone_padlist (pTHX_ AV *protopadlist) 196#define PRIO_MAX 3
197#define PRIO_HIGH 1
198#define PRIO_NORMAL 0
199#define PRIO_LOW -1
200#define PRIO_IDLE -3
201#define PRIO_MIN -4
202
203/* for Coro.pm */
204static SV *coro_current;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206static int coro_nready;
207
208/** lowlevel stuff **********************************************************/
209
210static AV *
211coro_clone_padlist (CV *cv)
145{ 212{
146 AV *av; 213 AV *padlist = CvPADLIST (cv);
147 I32 ix;
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150 SV **pname = AvARRAY (protopad_name);
151 SV **ppad = AvARRAY (protopad);
152 I32 fname = AvFILLp (protopad_name);
153 I32 fpad = AvFILLp (protopad);
154 AV *newpadlist, *newpad_name, *newpad; 214 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 215
165 newpadlist = newAV (); 216 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 217 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 218#if PERL_VERSION_ATLEAST (5,9,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
222#endif
223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
224 --AvFILLp (padlist);
225
226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168 av_store (newpadlist, 1, (SV *) newpad); 227 av_store (newpadlist, 1, (SV *)newpad);
169
170 av = newAV (); /* will be @_ */
171 av_extend (av, 0);
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174
175 for (ix = fpad; ix > 0; ix--)
176 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179 if (namesv && namesv != &PL_sv_undef)
180 {
181 char *name = SvPVX (namesv); /* XXX */
182
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184 { /* lexical from outside? */
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198
199#ifdef SvPADBUSY
200 if (!SvPADBUSY (sv))
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218
219#if 0 /* return -ENOTUNDERSTOOD */
220 /* Now that vars are all in place, clone nested closures. */
221
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238 228
239 return newpadlist; 229 return newpadlist;
240} 230}
241 231
242STATIC void 232static void
243free_padlist (pTHX_ AV *padlist) 233free_padlist (AV *padlist)
244{ 234{
245 /* may be during global destruction */ 235 /* may be during global destruction */
246 if (SvREFCNT (padlist)) 236 if (SvREFCNT (padlist))
247 { 237 {
248 I32 i = AvFILLp (padlist); 238 I32 i = AvFILLp (padlist);
… …
261 251
262 SvREFCNT_dec ((SV*)padlist); 252 SvREFCNT_dec ((SV*)padlist);
263 } 253 }
264} 254}
265 255
266STATIC int 256static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 257coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 258{
269 AV *padlist; 259 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 260 AV *av = (AV *)mg->mg_obj;
271 261
272 /* casting is fun. */ 262 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 264 free_padlist (padlist);
265
266 SvREFCNT_dec (av);
267
268 return 0;
275} 269}
276 270
277#define PERL_MAGIC_coro PERL_MAGIC_ext 271#define PERL_MAGIC_coro PERL_MAGIC_ext
278 272
279static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280 274
275#define CORO_MAGIC(cv) \
276 SvMAGIC (cv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278 ? SvMAGIC (cv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
280 : 0
281
281/* the next two functions merely cache the padlists */ 282/* the next two functions merely cache the padlists */
282STATIC void 283static void
283get_padlist (pTHX_ CV *cv) 284get_padlist (CV *cv)
284{ 285{
285 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 286 MAGIC *mg = CORO_MAGIC (cv);
287 AV *av;
286 288
287 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
288 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289 else 291 else
292 {
293#if PREFER_PERL_FUNCTIONS
294 /* this is probably cleaner, but also slower? */
295 CV *cp = Perl_cv_clone (cv);
296 CvPADLIST (cv) = CvPADLIST (cp);
297 CvPADLIST (cp) = 0;
298 SvREFCNT_dec (cp);
299#else
290 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 300 CvPADLIST (cv) = coro_clone_padlist (cv);
301#endif
302 }
291} 303}
292 304
293STATIC void 305static void
294put_padlist (pTHX_ CV *cv) 306put_padlist (CV *cv)
295{ 307{
296 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 308 MAGIC *mg = CORO_MAGIC (cv);
309 AV *av;
297 310
298 if (!mg) 311 if (!mg)
299 { 312 {
300 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302 mg->mg_virtual = &vtbl_coro; 315 mg->mg_virtual = &vtbl_coro;
303 mg->mg_obj = (SV *)newAV (); 316 mg->mg_obj = (SV *)newAV ();
304 } 317 }
305 318
306 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 319 av = (AV *)mg->mg_obj;
320
321 if (AvFILLp (av) >= AvMAX (av))
322 av_extend (av, AvMAX (av) + 1);
323
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
307} 325}
326
327/** load & save, init *******************************************************/
308 328
309#define SB do { 329#define SB do {
310#define SE } while (0) 330#define SE } while (0)
311 331
312#define LOAD(state) load_state(aTHX_ (state));
313#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
314
315#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
316 333
317static void 334static void
318load_state(pTHX_ Coro__State c) 335load_perl (Coro__State c)
319{ 336{
320 PL_dowarn = c->dowarn; 337#define VAR(name,type) PL_ ## name = c->name;
321 PL_in_eval = c->in_eval; 338# include "state.h"
322 339#undef VAR
323 PL_curstackinfo = c->curstackinfo;
324 PL_curstack = c->curstack;
325 PL_mainstack = c->mainstack;
326 PL_stack_sp = c->stack_sp;
327 PL_op = c->op;
328 PL_curpad = c->curpad;
329 PL_comppad = c->comppad;
330 PL_stack_base = c->stack_base;
331 PL_stack_max = c->stack_max;
332 PL_tmps_stack = c->tmps_stack;
333 PL_tmps_floor = c->tmps_floor;
334 PL_tmps_ix = c->tmps_ix;
335 PL_tmps_max = c->tmps_max;
336 PL_markstack = c->markstack;
337 PL_markstack_ptr = c->markstack_ptr;
338 PL_markstack_max = c->markstack_max;
339 PL_scopestack = c->scopestack;
340 PL_scopestack_ix = c->scopestack_ix;
341 PL_scopestack_max = c->scopestack_max;
342 PL_savestack = c->savestack;
343 PL_savestack_ix = c->savestack_ix;
344 PL_savestack_max = c->savestack_max;
345 PL_retstack = c->retstack;
346 PL_retstack_ix = c->retstack_ix;
347 PL_retstack_max = c->retstack_max;
348 PL_curcop = c->curcop;
349 PL_top_env = c->top_env;
350 340
351 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
354 355
355 { 356 {
356 dSP; 357 dSP;
357 CV *cv; 358 CV *cv;
358 359
359 /* now do the ugly restore mess */ 360 /* now do the ugly restore mess */
360 while ((cv = (CV *)POPs)) 361 while ((cv = (CV *)POPs))
361 { 362 {
362 AV *padlist = (AV *)POPs;
363
364 if (padlist)
365 {
366 put_padlist (aTHX_ cv); /* mark this padlist as available */ 363 put_padlist (cv); /* mark this padlist as available */
367 CvPADLIST(cv) = padlist; 364 CvDEPTH (cv) = PTR2IV (POPs);
368 } 365 CvPADLIST (cv) = (AV *)POPs;
369
370 ++CvDEPTH(cv);
371 } 366 }
372 367
373 PUTBACK; 368 PUTBACK;
374 } 369 }
375} 370}
376 371
377static void 372static void
378save_state(pTHX_ Coro__State c, int flags) 373save_perl (Coro__State c)
379{ 374{
380 { 375 {
381 dSP; 376 dSP;
382 I32 cxix = cxstack_ix; 377 I32 cxix = cxstack_ix;
383 PERL_CONTEXT *ccstk = cxstack; 378 PERL_CONTEXT *ccstk = cxstack;
… …
386 /* 381 /*
387 * the worst thing you can imagine happens first - we have to save 382 * the worst thing you can imagine happens first - we have to save
388 * (and reinitialize) all cv's in the whole callchain :( 383 * (and reinitialize) all cv's in the whole callchain :(
389 */ 384 */
390 385
386 EXTEND (SP, 3 + 1);
391 PUSHs (Nullsv); 387 PUSHs (Nullsv);
392 /* this loop was inspired by pp_caller */ 388 /* this loop was inspired by pp_caller */
393 for (;;) 389 for (;;)
394 { 390 {
395 while (cxix >= 0) 391 while (cxix >= 0)
396 { 392 {
397 PERL_CONTEXT *cx = &ccstk[cxix--]; 393 PERL_CONTEXT *cx = &ccstk[cxix--];
398 394
399 if (CxTYPE(cx) == CXt_SUB) 395 if (CxTYPE (cx) == CXt_SUB)
400 { 396 {
401 CV *cv = cx->blk_sub.cv; 397 CV *cv = cx->blk_sub.cv;
398
402 if (CvDEPTH(cv)) 399 if (CvDEPTH (cv))
403 { 400 {
404 EXTEND (SP, CvDEPTH(cv)*2); 401 EXTEND (SP, 3);
405
406 while (--CvDEPTH(cv))
407 {
408 /* this tells the restore code to increment CvDEPTH */
409 PUSHs (Nullsv);
410 PUSHs ((SV *)cv);
411 }
412
413 PUSHs ((SV *)CvPADLIST(cv)); 402 PUSHs ((SV *)CvPADLIST (cv));
403 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 404 PUSHs ((SV *)cv);
415 405
416 get_padlist (aTHX_ cv); /* this is a monster */ 406 CvDEPTH (cv) = 0;
407 get_padlist (cv);
417 } 408 }
418 } 409 }
419#ifdef CXt_FORMAT
420 else if (CxTYPE(cx) == CXt_FORMAT)
421 {
422 /* I never used formats, so how should I know how these are implemented? */
423 /* my bold guess is as a simple, plain sub... */
424 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425 }
426#endif
427 } 410 }
428 411
429 if (top_si->si_type == PERLSI_MAIN) 412 if (top_si->si_type == PERLSI_MAIN)
430 break; 413 break;
431 414
… …
435 } 418 }
436 419
437 PUTBACK; 420 PUTBACK;
438 } 421 }
439 422
440 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 423 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
441 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 424 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
442 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 425 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
426 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
443 427
444 c->dowarn = PL_dowarn; 428#define VAR(name,type)c->name = PL_ ## name;
445 c->in_eval = PL_in_eval; 429# include "state.h"
446 430#undef VAR
447 c->curstackinfo = PL_curstackinfo;
448 c->curstack = PL_curstack;
449 c->mainstack = PL_mainstack;
450 c->stack_sp = PL_stack_sp;
451 c->op = PL_op;
452 c->curpad = PL_curpad;
453 c->comppad = PL_comppad;
454 c->stack_base = PL_stack_base;
455 c->stack_max = PL_stack_max;
456 c->tmps_stack = PL_tmps_stack;
457 c->tmps_floor = PL_tmps_floor;
458 c->tmps_ix = PL_tmps_ix;
459 c->tmps_max = PL_tmps_max;
460 c->markstack = PL_markstack;
461 c->markstack_ptr = PL_markstack_ptr;
462 c->markstack_max = PL_markstack_max;
463 c->scopestack = PL_scopestack;
464 c->scopestack_ix = PL_scopestack_ix;
465 c->scopestack_max = PL_scopestack_max;
466 c->savestack = PL_savestack;
467 c->savestack_ix = PL_savestack_ix;
468 c->savestack_max = PL_savestack_max;
469 c->retstack = PL_retstack;
470 c->retstack_ix = PL_retstack_ix;
471 c->retstack_max = PL_retstack_max;
472 c->curcop = PL_curcop;
473 c->top_env = PL_top_env;
474} 431}
475 432
476/* 433/*
477 * allocate various perl stacks. This is an exact copy 434 * allocate various perl stacks. This is an exact copy
478 * of perl.c:init_stacks, except that it uses less memory 435 * of perl.c:init_stacks, except that it uses less memory
479 * on the (sometimes correct) assumption that coroutines do 436 * on the (sometimes correct) assumption that coroutines do
480 * not usually need a lot of stackspace. 437 * not usually need a lot of stackspace.
481 */ 438 */
482STATIC void 439#if PREFER_PERL_FUNCTIONS
440# define coro_init_stacks init_stacks
441#else
442static void
483coro_init_stacks (pTHX) 443coro_init_stacks ()
484{ 444{
485 LOCK;
486
487 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 445 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
488 PL_curstackinfo->si_type = PERLSI_MAIN; 446 PL_curstackinfo->si_type = PERLSI_MAIN;
489 PL_curstack = PL_curstackinfo->si_stack; 447 PL_curstack = PL_curstackinfo->si_stack;
490 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491 449
492 PL_stack_base = AvARRAY(PL_curstack); 450 PL_stack_base = AvARRAY(PL_curstack);
493 PL_stack_sp = PL_stack_base; 451 PL_stack_sp = PL_stack_base;
494 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495 453
496 New(50,PL_tmps_stack,96,SV*); 454 New(50,PL_tmps_stack,128,SV*);
497 PL_tmps_floor = -1; 455 PL_tmps_floor = -1;
498 PL_tmps_ix = -1; 456 PL_tmps_ix = -1;
499 PL_tmps_max = 96; 457 PL_tmps_max = 128;
500 458
501 New(54,PL_markstack,16,I32); 459 New(54,PL_markstack,32,I32);
502 PL_markstack_ptr = PL_markstack; 460 PL_markstack_ptr = PL_markstack;
503 PL_markstack_max = PL_markstack + 16; 461 PL_markstack_max = PL_markstack + 32;
504 462
505#ifdef SET_MARK_OFFSET 463#ifdef SET_MARK_OFFSET
506 SET_MARK_OFFSET; 464 SET_MARK_OFFSET;
507#endif 465#endif
508 466
509 New(54,PL_scopestack,16,I32); 467 New(54,PL_scopestack,32,I32);
510 PL_scopestack_ix = 0; 468 PL_scopestack_ix = 0;
511 PL_scopestack_max = 16; 469 PL_scopestack_max = 32;
512 470
513 New(54,PL_savestack,96,ANY); 471 New(54,PL_savestack,64,ANY);
514 PL_savestack_ix = 0; 472 PL_savestack_ix = 0;
515 PL_savestack_max = 96; 473 PL_savestack_max = 64;
516 474
475#if !PERL_VERSION_ATLEAST (5,9,0)
517 New(54,PL_retstack,8,OP*); 476 New(54,PL_retstack,16,OP*);
518 PL_retstack_ix = 0; 477 PL_retstack_ix = 0;
519 PL_retstack_max = 8; 478 PL_retstack_max = 16;
520 479#endif
521 UNLOCK;
522} 480}
481#endif
523 482
524/* 483/*
525 * destroy the stacks, the callchain etc... 484 * destroy the stacks, the callchain etc...
526 */ 485 */
527STATIC void 486static void
528destroy_stacks(pTHX) 487coro_destroy_stacks ()
529{ 488{
530 if (!IN_DESTRUCT) 489 if (!IN_DESTRUCT)
531 { 490 {
532 /* is this ugly, I ask? */ 491 /* restore all saved variables and stuff */
533 LEAVE_SCOPE (0); 492 LEAVE_SCOPE (0);
493 assert (PL_tmps_floor == -1);
534 494
535 /* sure it is, but more important: is it correct?? :/ */ 495 /* free all temporaries */
536 FREETMPS; 496 FREETMPS;
497 assert (PL_tmps_ix == -1);
498
499 /* unwind all extra stacks */
500 POPSTACK_TO (PL_mainstack);
501
502 /* unwind main stack */
503 dounwind (-1);
537 } 504 }
538 505
539 while (PL_curstackinfo->si_next) 506 while (PL_curstackinfo->si_next)
540 PL_curstackinfo = PL_curstackinfo->si_next; 507 PL_curstackinfo = PL_curstackinfo->si_next;
541 508
542 while (PL_curstackinfo) 509 while (PL_curstackinfo)
543 { 510 {
544 PERL_SI *p = PL_curstackinfo->si_prev; 511 PERL_SI *p = PL_curstackinfo->si_prev;
545 512
546 {
547 dSP;
548 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549 PUTBACK; /* possibly superfluous */
550 }
551
552 if (!IN_DESTRUCT) 513 if (!IN_DESTRUCT)
553 {
554 dounwind(-1);
555 SvREFCNT_dec(PL_curstackinfo->si_stack); 514 SvREFCNT_dec (PL_curstackinfo->si_stack);
556 }
557 515
558 Safefree(PL_curstackinfo->si_cxstack); 516 Safefree (PL_curstackinfo->si_cxstack);
559 Safefree(PL_curstackinfo); 517 Safefree (PL_curstackinfo);
560 PL_curstackinfo = p; 518 PL_curstackinfo = p;
561 } 519 }
562 520
563 Safefree(PL_tmps_stack); 521 Safefree (PL_tmps_stack);
564 Safefree(PL_markstack); 522 Safefree (PL_markstack);
565 Safefree(PL_scopestack); 523 Safefree (PL_scopestack);
566 Safefree(PL_savestack); 524 Safefree (PL_savestack);
525#if !PERL_VERSION_ATLEAST (5,9,0)
567 Safefree(PL_retstack); 526 Safefree (PL_retstack);
568}
569
570static void
571allocate_stack (Coro__State ctx, int alloc)
572{
573 coro_stack *stack;
574
575 New (0, stack, 1, coro_stack);
576
577 stack->refcnt = 1;
578 stack->usecnt = 1;
579 stack->gencnt = ctx->gencnt = 0;
580
581 if (alloc)
582 {
583#if HAVE_MMAP
584 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
585 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586 if (stack->sptr == (void *)-1)
587#endif 527#endif
588 {
589 /*FIXME*//*D*//* reasonable stack size! */
590 stack->ssize = - (8192 * sizeof (long));
591 New (0, stack->sptr, 8192, long);
592 }
593 }
594 else
595 stack->sptr = 0;
596
597 ctx->stack = stack;
598} 528}
599 529
600static void 530/** coroutine stack handling ************************************************/
601deallocate_stack (Coro__State ctx)
602{
603 coro_stack *stack = ctx->stack;
604 531
605 ctx->stack = 0;
606
607 if (stack)
608 {
609 if (!--stack->refcnt)
610 {
611#ifdef HAVE_MMAP
612 if (stack->ssize > 0 && stack->sptr)
613 munmap (stack->sptr, stack->ssize);
614 else
615#endif
616 Safefree (stack->sptr);
617
618 Safefree (stack);
619 }
620 else if (ctx->gencnt == stack->gencnt)
621 --stack->usecnt;
622 }
623}
624
625static void 532static void
626setup_coro (void *arg) 533setup_coro (struct coro *coro)
627{ 534{
628 /* 535 /*
629 * emulate part of the perl startup here. 536 * emulate part of the perl startup here.
630 */ 537 */
631 dTHX; 538
539 coro_init_stacks ();
540
541 PL_curcop = &PL_compiling;
542 PL_in_eval = EVAL_NULL;
543 PL_curpm = 0;
544 PL_localizing = 0;
545 PL_dirty = 0;
546 PL_restartop = 0;
547
548 {
549 dSP;
550 LOGOP myop;
551
552 SvREFCNT_dec (GvAV (PL_defgv));
553 GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555 Zero (&myop, 1, LOGOP);
556 myop.op_next = Nullop;
557 myop.op_flags = OPf_WANT_VOID;
558
559 PUSHMARK (SP);
560 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
561 PUTBACK;
562 PL_op = (OP *)&myop;
563 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
564 SPAGAIN;
565 }
566
567 ENTER; /* necessary e.g. for dounwind */
568}
569
570static void
571free_coro_mortal ()
572{
573 if (coro_mortal)
574 {
575 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0;
577 }
578}
579
580/* inject a fake call to Coro::State::_cctx_init into the execution */
581static void NOINLINE
582prepare_cctx (coro_cctx *cctx)
583{
632 dSP; 584 dSP;
633 Coro__State ctx = (Coro__State)arg; 585 LOGOP myop;
634 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
635 586
636 coro_init_stacks (aTHX); 587 Zero (&myop, 1, LOGOP);
637 /*PL_curcop = 0;*/ 588 myop.op_next = PL_op;
638 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 589 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
639 SvREFCNT_dec (GvAV (PL_defgv));
640 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
641 590
591 PUSHMARK (SP);
592 EXTEND (SP, 2);
593 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
594 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
595 PUTBACK;
596 PL_op = (OP *)&myop;
597 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
642 SPAGAIN; 598 SPAGAIN;
643
644 if (ctx->stack)
645 {
646 ctx->cursp = 0;
647
648 PUSHMARK(SP);
649 PUTBACK;
650 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
651
652 if (SvTRUE (ERRSV))
653 croak (NULL);
654 else
655 croak ("FATAL: CCTXT coroutine returned!");
656 }
657 else
658 {
659 UNOP myop;
660
661 PL_op = (OP *)&myop;
662
663 Zero(&myop, 1, UNOP);
664 myop.op_next = Nullop;
665 myop.op_flags = OPf_WANT_VOID;
666
667 PUSHMARK(SP);
668 XPUSHs (sub_init);
669 /*
670 * the next line is slightly wrong, as PL_op->op_next
671 * is actually being executed so we skip the first op.
672 * that doesn't matter, though, since it is only
673 * pp_nextstate and we never return...
674 * ah yes, and I don't care anyways ;)
675 */
676 PUTBACK;
677 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
678 SPAGAIN;
679
680 ENTER; /* necessary e.g. for dounwind */
681 }
682} 599}
683 600
684static void 601static void
685continue_coro (void *arg) 602coro_run (void *arg)
686{ 603{
604 /* coro_run is the alternative tail of transfer(), so unlock here. */
605 UNLOCK;
606
687 /* 607 /*
688 * this is a _very_ stripped down perl interpreter ;) 608 * this is a _very_ stripped down perl interpreter ;)
689 */ 609 */
690 dTHX;
691 Coro__State ctx = (Coro__State)arg;
692 JMPENV coro_start_env;
693
694 PL_top_env = &ctx->start_env; 610 PL_top_env = &PL_start_env;
695 611
696 ctx->cursp = 0; 612 /* inject call to cctx_init */
697 PL_op = PL_op->op_next; 613 prepare_cctx ((coro_cctx *)arg);
698 CALLRUNOPS(aTHX);
699 614
615 /* somebody will hit me for both perl_run and PL_restartop */
616 PL_restartop = PL_op;
617 perl_run (PL_curinterp);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
700 abort (); 620 abort ();
701} 621}
702 622
703STATIC void 623static coro_cctx *
624cctx_new ()
625{
626 coro_cctx *cctx;
627
628 ++cctx_count;
629
630 Newz (0, cctx, 1, coro_cctx);
631
632#if HAVE_MMAP
633
634 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
635 /* mmap supposedly does allocate-on-write for us */
636 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
637
638 if (cctx->sptr != (void *)-1)
639 {
640# if STACKGUARD
641 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
642# endif
643 REGISTER_STACK (
644 cctx,
645 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
646 cctx->ssize + (char *)cctx->sptr
647 );
648
649 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
650 }
651 else
652#endif
653 {
654 cctx->ssize = -STACKSIZE * (long)sizeof (long);
655 New (0, cctx->sptr, STACKSIZE, long);
656
657 if (!cctx->sptr)
658 {
659 perror ("FATAL: unable to allocate stack for coroutine");
660 _exit (EXIT_FAILURE);
661 }
662
663 REGISTER_STACK (
664 cctx,
665 (char *)cctx->sptr,
666 (char *)cctx->sptr - cctx->ssize
667 );
668
669 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
670 }
671
672 return cctx;
673}
674
675static void
676cctx_destroy (coro_cctx *cctx)
677{
678 if (!cctx)
679 return;
680
681 --cctx_count;
682
683#if USE_VALGRIND
684 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
685#endif
686
687#if HAVE_MMAP
688 if (cctx->ssize > 0)
689 munmap (cctx->sptr, cctx->ssize);
690 else
691#endif
692 Safefree (cctx->sptr);
693
694 Safefree (cctx);
695}
696
697static coro_cctx *
698cctx_get ()
699{
700 coro_cctx *cctx;
701
702 if (cctx_first)
703 {
704 cctx = cctx_first;
705 cctx_first = cctx->next;
706 --cctx_idle;
707 }
708 else
709 {
710 cctx = cctx_new ();
711 PL_op = PL_op->op_next;
712 }
713
714 return cctx;
715}
716
717static void
718cctx_put (coro_cctx *cctx)
719{
720 /* free another cctx if overlimit */
721 if (cctx_idle >= MAX_IDLE_CCTX)
722 {
723 coro_cctx *first = cctx_first;
724 cctx_first = first->next;
725 --cctx_idle;
726
727 assert (!first->inuse);
728 cctx_destroy (first);
729 }
730
731 ++cctx_idle;
732 cctx->next = cctx_first;
733 cctx_first = cctx;
734}
735
736/** coroutine switching *****************************************************/
737
738/* never call directly, always through the coro_state_transfer global variable */
739static void NOINLINE
704transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 740transfer (struct coro *prev, struct coro *next)
705{ 741{
706 dSTACKLEVEL; 742 dSTACKLEVEL;
707 743
744 /* sometimes transfer is only called to set idle_sp */
745 if (!next)
746 {
747 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
748 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
749 }
708 if (prev != next) 750 else if (prev != next)
709 { 751 {
710 if (next->mainstack) 752 coro_cctx *prev__cctx;
753
754 if (prev->flags & CF_NEW)
711 { 755 {
712 LOCK; 756 /* create a new empty context */
713 SAVE (prev, flags); 757 Newz (0, prev->cctx, 1, coro_cctx);
714 LOAD (next); 758 prev->cctx->inuse = 1;
715 UNLOCK; 759 prev->flags &= ~CF_NEW;
716 760 prev->flags |= CF_RUNNING;
717 /* mark this state as in-use */
718 next->mainstack = 0;
719 next->tmps_ix = -2;
720
721 /* stacklevel changed? if yes, grab the stack for us! */
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726 else if (prev->cursp != stacklevel
727 && prev->stack->usecnt > 1)
728 {
729 prev->gencnt = ++prev->stack->gencnt;
730 prev->stack->usecnt = 1;
731 }
732
733 /* has our stack been invalidated? */
734 if (next->stack && next->stack->gencnt != next->gencnt)
735 {
736 deallocate_stack (next);
737 allocate_stack (next, 1);
738 coro_create (&(next->stack->cctx),
739 continue_coro, (void *)next,
740 next->stack->sptr, labs (next->stack->ssize));
741 }
742
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 prev->cursp = stacklevel;
745 /* don't add any code here */
746 }
747 else
748 next->cursp = stacklevel;
749 } 761 }
750 else if (next->tmps_ix == -2) 762
751 croak ("tried to transfer to running coroutine"); 763 /*TODO: must not croak here */
764 if (!prev->flags & CF_RUNNING)
765 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
766
767 if (next->flags & CF_RUNNING)
768 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
769
770 if (next->flags & CF_DESTROYED)
771 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
772
773 prev->flags &= ~CF_RUNNING;
774 next->flags |= CF_RUNNING;
775
776 LOCK;
777
778 if (next->flags & CF_NEW)
779 {
780 /* need to start coroutine */
781 next->flags &= ~CF_NEW;
782 /* first get rid of the old state */
783 save_perl (prev);
784 /* setup coroutine call */
785 setup_coro (next);
786 /* need a new stack */
787 assert (!next->cctx);
788 }
752 else 789 else
753 { 790 {
754 LOCK; 791 /* coroutine already started */
755 SAVE (prev, -1); /* first get rid of the old state */ 792 save_perl (prev);
756 UNLOCK; 793 load_perl (next);
757
758 if (flags & TRANSFER_SAVE_CCTXT)
759 {
760 if (!prev->stack)
761 allocate_stack (prev, 0);
762
763 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
764 {
765 PL_top_env = &next->start_env;
766
767 setup_coro (next);
768 next->cursp = stacklevel;
769
770 prev->stack->refcnt++;
771 prev->stack->usecnt++;
772 next->stack = prev->stack;
773 next->gencnt = prev->gencnt;
774 }
775 else
776 {
777 assert (!next->stack);
778 allocate_stack (next, 1);
779 coro_create (&(next->stack->cctx),
780 setup_coro, (void *)next,
781 next->stack->sptr, labs (next->stack->ssize));
782 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
783 prev->cursp = stacklevel;
784 /* don't add any code here */
785 }
786 }
787 else
788 {
789 setup_coro (next);
790 next->cursp = stacklevel;
791 }
792 } 794 }
793 }
794 795
795 LOCK; 796 prev__cctx = prev->cctx;
796 if (coro_mortal) 797
797 { 798 /* possibly "free" the cctx */
798 SvREFCNT_dec (coro_mortal); 799 if (prev__cctx->idle_sp == STACKLEVEL)
800 {
801 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
802 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
803
804 prev->cctx = 0;
805
806 cctx_put (prev__cctx);
807 prev__cctx->inuse = 0;
808 }
809
810 if (!next->cctx)
811 {
812 next->cctx = cctx_get ();
813 assert (!next->cctx->inuse);
814 next->cctx->inuse = 1;
815 }
816
817 if (prev__cctx != next->cctx)
818 {
819 prev__cctx->top_env = PL_top_env;
820 PL_top_env = next->cctx->top_env;
821 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
822 }
823
799 coro_mortal = 0; 824 free_coro_mortal ();
800 }
801 UNLOCK; 825 UNLOCK;
826 }
802} 827}
803 828
804#define SV_CORO(sv,func) \ 829struct transfer_args
805 do { \ 830{
806 if (SvROK (sv)) \ 831 struct coro *prev, *next;
807 sv = SvRV (sv); \ 832};
808 \
809 if (SvTYPE (sv) == SVt_PVHV) \
810 { \
811 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
812 \
813 if (!he) \
814 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
815 \
816 (sv) = SvRV (HeVAL(he)); \
817 } \
818 \
819 /* must also be changed inside Coro::Cont::yield */ \
820 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
821 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
822 \
823 } while(0)
824 833
825#define SvSTATE(sv) (struct coro *)SvIV (sv) 834#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
826 835
836/** high level stuff ********************************************************/
837
827static void 838static int
839coro_state_destroy (struct coro *coro)
840{
841 if (coro->flags & CF_DESTROYED)
842 return 0;
843
844 coro->flags |= CF_DESTROYED;
845
846 if (coro->flags & CF_READY)
847 {
848 /* reduce nready, as destroying a ready coro effectively unreadies it */
849 /* alternative: look through all ready queues and remove the coro */
850 LOCK;
851 --coro_nready;
852 UNLOCK;
853 }
854 else
855 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
856
857 if (coro->mainstack && coro->mainstack != main_mainstack)
858 {
859 struct coro temp;
860
861 assert (!(coro->flags & CF_RUNNING));
862
863 Zero (&temp, 1, struct coro);
864 temp.save = CORO_SAVE_ALL;
865
866 if (coro->flags & CF_RUNNING)
867 croak ("FATAL: tried to destroy currently running coroutine");
868
869 save_perl (&temp);
870 load_perl (coro);
871
872 coro_destroy_stacks ();
873
874 load_perl (&temp); /* this will get rid of defsv etc.. */
875
876 coro->mainstack = 0;
877 }
878
879 cctx_destroy (coro->cctx);
880 SvREFCNT_dec (coro->args);
881
882 return 1;
883}
884
885static int
886coro_state_free (pTHX_ SV *sv, MAGIC *mg)
887{
888 struct coro *coro = (struct coro *)mg->mg_ptr;
889 mg->mg_ptr = 0;
890
891 if (--coro->refcnt < 0)
892 {
893 coro_state_destroy (coro);
894 Safefree (coro);
895 }
896
897 return 0;
898}
899
900static int
901coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
902{
903 struct coro *coro = (struct coro *)mg->mg_ptr;
904
905 ++coro->refcnt;
906
907 return 0;
908}
909
910static MGVTBL coro_state_vtbl = {
911 0, 0, 0, 0,
912 coro_state_free,
913 0,
914#ifdef MGf_DUP
915 coro_state_dup,
916#else
917# define MGf_DUP 0
918#endif
919};
920
921static struct coro *
922SvSTATE (SV *coro)
923{
924 HV *stash;
925 MAGIC *mg;
926
927 if (SvROK (coro))
928 coro = SvRV (coro);
929
930 stash = SvSTASH (coro);
931 if (stash != coro_stash && stash != coro_state_stash)
932 {
933 /* very slow, but rare, check */
934 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
935 croak ("Coro::State object required");
936 }
937
938 mg = SvMAGIC (coro);
939 assert (mg->mg_type == PERL_MAGIC_ext);
940 return (struct coro *)mg->mg_ptr;
941}
942
943static void
944prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
945{
946 ta->prev = SvSTATE (prev_sv);
947 ta->next = SvSTATE (next_sv);
948}
949
950static void
828api_transfer(pTHX_ SV *prev, SV *next, int flags) 951api_transfer (SV *prev_sv, SV *next_sv)
829{ 952{
830 SV_CORO (prev, "Coro::transfer"); 953 struct transfer_args ta;
831 SV_CORO (next, "Coro::transfer");
832 954
833 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 955 prepare_transfer (&ta, prev_sv, next_sv);
956 TRANSFER (ta);
957}
958
959static int
960api_save (SV *coro_sv, int new_save)
961{
962 struct coro *coro = SvSTATE (coro_sv);
963 int old_save = coro->save;
964
965 if (new_save >= 0)
966 coro->save = new_save;
967
968 return old_save;
834} 969}
835 970
836/** Coro ********************************************************************/ 971/** Coro ********************************************************************/
837 972
838#define PRIO_MAX 3
839#define PRIO_HIGH 1
840#define PRIO_NORMAL 0
841#define PRIO_LOW -1
842#define PRIO_IDLE -3
843#define PRIO_MIN -4
844
845/* for Coro.pm */
846static GV *coro_current, *coro_idle;
847static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
848static int coro_nready;
849
850static void 973static void
851coro_enq (pTHX_ SV *sv) 974coro_enq (SV *coro_sv)
852{ 975{
853 if (SvTYPE (sv) == SVt_PVHV)
854 {
855 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
856 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
857
858 prio = prio > PRIO_MAX ? PRIO_MAX
859 : prio < PRIO_MIN ? PRIO_MIN
860 : prio;
861
862 av_push (coro_ready [prio - PRIO_MIN], sv); 976 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
863 coro_nready++;
864
865 return;
866 }
867
868 croak ("Coro::ready tried to enqueue something that is not a coroutine");
869} 977}
870 978
871static SV * 979static SV *
872coro_deq (pTHX_ int min_prio) 980coro_deq (int min_prio)
873{ 981{
874 int prio = PRIO_MAX - PRIO_MIN; 982 int prio = PRIO_MAX - PRIO_MIN;
875 983
876 min_prio -= PRIO_MIN; 984 min_prio -= PRIO_MIN;
877 if (min_prio < 0) 985 if (min_prio < 0)
878 min_prio = 0; 986 min_prio = 0;
879 987
880 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 988 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
881 if (av_len (coro_ready[prio]) >= 0) 989 if (AvFILLp (coro_ready [prio]) >= 0)
882 {
883 coro_nready--;
884 return av_shift (coro_ready[prio]); 990 return av_shift (coro_ready [prio]);
885 }
886 991
887 return 0; 992 return 0;
888} 993}
889 994
890static void 995static int
891api_ready (SV *coro) 996api_ready (SV *coro_sv)
892{ 997{
893 dTHX; 998 struct coro *coro;
894 999
895 if (SvROK (coro)) 1000 if (SvROK (coro_sv))
896 coro = SvRV (coro); 1001 coro_sv = SvRV (coro_sv);
1002
1003 coro = SvSTATE (coro_sv);
1004
1005 if (coro->flags & CF_READY)
1006 return 0;
1007
1008 coro->flags |= CF_READY;
897 1009
898 LOCK; 1010 LOCK;
899 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1011 coro_enq (SvREFCNT_inc (coro_sv));
1012 ++coro_nready;
900 UNLOCK; 1013 UNLOCK;
1014
1015 return 1;
1016}
1017
1018static int
1019api_is_ready (SV *coro_sv)
1020{
1021 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1022}
1023
1024static void
1025prepare_schedule (struct transfer_args *ta)
1026{
1027 SV *prev_sv, *next_sv;
1028
1029 for (;;)
1030 {
1031 LOCK;
1032 next_sv = coro_deq (PRIO_MIN);
1033
1034 /* nothing to schedule: call the idle handler */
1035 if (!next_sv)
1036 {
1037 dSP;
1038 UNLOCK;
1039
1040 ENTER;
1041 SAVETMPS;
1042
1043 PUSHMARK (SP);
1044 PUTBACK;
1045 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1046
1047 FREETMPS;
1048 LEAVE;
1049 continue;
1050 }
1051
1052 ta->next = SvSTATE (next_sv);
1053
1054 /* cannot transfer to destroyed coros, skip and look for next */
1055 if (ta->next->flags & CF_DESTROYED)
1056 {
1057 UNLOCK;
1058 SvREFCNT_dec (next_sv);
1059 /* coro_nready is already taken care of by destroy */
1060 continue;
1061 }
1062
1063 --coro_nready;
1064 UNLOCK;
1065 break;
1066 }
1067
1068 /* free this only after the transfer */
1069 prev_sv = SvRV (coro_current);
1070 SvRV_set (coro_current, next_sv);
1071 ta->prev = SvSTATE (prev_sv);
1072
1073 assert (ta->next->flags & CF_READY);
1074 ta->next->flags &= ~CF_READY;
1075
1076 LOCK;
1077 free_coro_mortal ();
1078 coro_mortal = prev_sv;
1079 UNLOCK;
1080}
1081
1082static void
1083prepare_cede (struct transfer_args *ta)
1084{
1085 api_ready (coro_current);
1086 prepare_schedule (ta);
1087}
1088
1089static int
1090prepare_cede_notself (struct transfer_args *ta)
1091{
1092 if (coro_nready)
1093 {
1094 SV *prev = SvRV (coro_current);
1095 prepare_schedule (ta);
1096 api_ready (prev);
1097 return 1;
1098 }
1099 else
1100 return 0;
901} 1101}
902 1102
903static void 1103static void
904api_schedule (void) 1104api_schedule (void)
905{ 1105{
906 dTHX; 1106 struct transfer_args ta;
907 1107
908 SV *prev, *next; 1108 prepare_schedule (&ta);
909 1109 TRANSFER (ta);
910 LOCK;
911
912 prev = SvRV (GvSV (coro_current));
913 next = coro_deq (aTHX_ PRIO_MIN);
914
915 if (!next)
916 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
917
918 /* free this only after the transfer */
919 coro_mortal = prev;
920 SV_CORO (prev, "Coro::schedule");
921
922 SvRV (GvSV (coro_current)) = next;
923
924 SV_CORO (next, "Coro::schedule");
925
926 UNLOCK;
927
928 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
929 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
930} 1110}
931 1111
932static void 1112static int
933api_cede (void) 1113api_cede (void)
934{ 1114{
935 dTHX; 1115 struct transfer_args ta;
936 1116
937 LOCK; 1117 prepare_cede (&ta);
938 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
939 UNLOCK;
940 1118
941 api_schedule (); 1119 if (ta.prev != ta.next)
1120 {
1121 TRANSFER (ta);
1122 return 1;
1123 }
1124 else
1125 return 0;
1126}
1127
1128static int
1129api_cede_notself (void)
1130{
1131 struct transfer_args ta;
1132
1133 if (prepare_cede_notself (&ta))
1134 {
1135 TRANSFER (ta);
1136 return 1;
1137 }
1138 else
1139 return 0;
942} 1140}
943 1141
944MODULE = Coro::State PACKAGE = Coro::State 1142MODULE = Coro::State PACKAGE = Coro::State
945 1143
946PROTOTYPES: ENABLE 1144PROTOTYPES: DISABLE
947 1145
948BOOT: 1146BOOT:
949{ /* {} necessary for stoopid perl-5.6.x */ 1147{
950#ifdef USE_ITHREADS 1148#ifdef USE_ITHREADS
951 MUTEX_INIT (&coro_mutex); 1149 MUTEX_INIT (&coro_mutex);
952#endif 1150#endif
1151 BOOT_PAGESIZE;
953 1152
954 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
955 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
956 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1153 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
957 1154
958 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1155 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
959 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1156 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
960 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1157 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1158 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
961 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1159 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
962 1160
963 main_mainstack = PL_mainstack; 1161 main_mainstack = PL_mainstack;
964 1162
965 coroapi.ver = CORO_API_VERSION; 1163 coroapi.ver = CORO_API_VERSION;
966 coroapi.transfer = api_transfer; 1164 coroapi.transfer = api_transfer;
967}
968 1165
969Coro::State 1166 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
970_newprocess(args) 1167}
971 SV * args 1168
972 PROTOTYPE: $ 1169SV *
1170new (char *klass, ...)
973 CODE: 1171 CODE:
974 Coro__State coro; 1172{
1173 struct coro *coro;
1174 HV *hv;
1175 int i;
975 1176
976 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
977 croak ("Coro::State::_newprocess expects an arrayref");
978
979 Newz (0, coro, 1, struct coro); 1177 Newz (0, coro, 1, struct coro);
1178 coro->args = newAV ();
1179 coro->save = CORO_SAVE_ALL;
1180 coro->flags = CF_NEW;
980 1181
981 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1182 hv = newHV ();
982 coro->mainstack = 0; /* actual work is done inside transfer */ 1183 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
983 coro->stack = 0; 1184 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984 1185
985 /* same as JMPENV_BOOTSTRAP */ 1186 for (i = 1; i < items; i++)
986 /* we might be able to recycle start_env, but safe is safe */ 1187 av_push (coro->args, newSVsv (ST (i)));
987 //Zero(&coro->start_env, 1, JMPENV); 1188}
988 coro->start_env.je_ret = -1;
989 coro->start_env.je_mustcatch = TRUE;
990
991 RETVAL = coro;
992 OUTPUT: 1189 OUTPUT:
993 RETVAL 1190 RETVAL
994 1191
1192int
1193save (SV *coro, int new_save = -1)
1194 CODE:
1195 RETVAL = api_save (coro, new_save);
1196 OUTPUT:
1197 RETVAL
1198
995void 1199void
996transfer(prev, next, flags) 1200_set_stacklevel (...)
997 SV *prev 1201 ALIAS:
998 SV *next 1202 Coro::State::transfer = 1
999 int flags 1203 Coro::schedule = 2
1000 PROTOTYPE: @ 1204 Coro::cede = 3
1205 Coro::cede_notself = 4
1001 CODE: 1206 CODE:
1002 PUTBACK; 1207{
1003 SV_CORO (next, "Coro::transfer"); 1208 struct transfer_args ta;
1004 SV_CORO (prev, "Coro::transfer"); 1209
1005 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1210 switch (ix)
1006 SPAGAIN; 1211 {
1212 case 0:
1213 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1214 ta.next = 0;
1215 break;
1216
1217 case 1:
1218 if (items != 2)
1219 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1220
1221 prepare_transfer (&ta, ST (0), ST (1));
1222 break;
1223
1224 case 2:
1225 prepare_schedule (&ta);
1226 break;
1227
1228 case 3:
1229 prepare_cede (&ta);
1230 break;
1231
1232 case 4:
1233 if (!prepare_cede_notself (&ta))
1234 XSRETURN_EMPTY;
1235
1236 break;
1237 }
1238
1239 BARRIER;
1240 TRANSFER (ta);
1241
1242 if (GIMME_V != G_VOID && ta.next != ta.prev)
1243 XSRETURN_YES;
1244}
1245
1246bool
1247_destroy (SV *coro_sv)
1248 CODE:
1249 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1250 OUTPUT:
1251 RETVAL
1007 1252
1008void 1253void
1009DESTROY(coro)
1010 Coro::State coro
1011 CODE:
1012
1013 if (coro->mainstack && coro->mainstack != main_mainstack)
1014 {
1015 struct coro temp;
1016
1017 PUTBACK;
1018 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1019 LOAD(aTHX_ coro);
1020 SPAGAIN;
1021
1022 destroy_stacks (aTHX);
1023
1024 LOAD((&temp)); /* this will get rid of defsv etc.. */
1025 SPAGAIN;
1026
1027 coro->mainstack = 0;
1028 }
1029
1030 deallocate_stack (coro);
1031 SvREFCNT_dec (coro->args);
1032 Safefree (coro);
1033
1034void
1035_exit(code) 1254_exit (code)
1036 int code 1255 int code
1037 PROTOTYPE: $ 1256 PROTOTYPE: $
1038 CODE: 1257 CODE:
1039 _exit (code); 1258 _exit (code);
1040 1259
1041MODULE = Coro::State PACKAGE = Coro::Cont 1260int
1261cctx_count ()
1262 CODE:
1263 RETVAL = cctx_count;
1264 OUTPUT:
1265 RETVAL
1042 1266
1043# this is slightly dirty (should expose a c-level api) 1267int
1044 1268cctx_idle ()
1045void 1269 CODE:
1046yield(...) 1270 RETVAL = cctx_idle;
1047 PROTOTYPE: @ 1271 OUTPUT:
1048 CODE: 1272 RETVAL
1049 static SV *returnstk;
1050 SV *sv;
1051 AV *defav = GvAV (PL_defgv);
1052 struct coro *prev, *next;
1053
1054 if (!returnstk)
1055 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1056
1057 /* set up @_ -- ugly */
1058 av_clear (defav);
1059 av_fill (defav, items - 1);
1060 while (items--)
1061 av_store (defav, items, SvREFCNT_inc (ST(items)));
1062
1063 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1064 sv = av_pop ((AV *)SvRV (returnstk));
1065 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1066 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1067 SvREFCNT_dec (sv);
1068
1069 transfer(aTHX_ prev, next, 0);
1070 1273
1071MODULE = Coro::State PACKAGE = Coro 1274MODULE = Coro::State PACKAGE = Coro
1072 1275
1073# this is slightly dirty (should expose a c-level api)
1074
1075BOOT: 1276BOOT:
1076{ 1277{
1077 int i; 1278 int i;
1279
1078 HV *stash = gv_stashpv ("Coro", TRUE); 1280 coro_stash = gv_stashpv ("Coro", TRUE);
1079 1281
1080 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1282 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1283 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1284 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1285 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1286 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1287 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086 1288
1087 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1289 coro_current = get_sv ("Coro::current", FALSE);
1088 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1290 SvREADONLY_on (coro_current);
1089 1291
1090 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1292 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091 coro_ready[i] = newAV (); 1293 coro_ready[i] = newAV ();
1092 1294
1093 { 1295 {
1094 SV *sv = perl_get_sv("Coro::API", 1); 1296 SV *sv = perl_get_sv("Coro::API", 1);
1095 1297
1096 coroapi.schedule = api_schedule; 1298 coroapi.schedule = api_schedule;
1299 coroapi.save = api_save;
1097 coroapi.cede = api_cede; 1300 coroapi.cede = api_cede;
1301 coroapi.cede_notself = api_cede_notself;
1098 coroapi.ready = api_ready; 1302 coroapi.ready = api_ready;
1303 coroapi.is_ready = api_is_ready;
1099 coroapi.nready = &coro_nready; 1304 coroapi.nready = &coro_nready;
1100 coroapi.current = coro_current; 1305 coroapi.current = coro_current;
1101 1306
1102 GCoroAPI = &coroapi; 1307 GCoroAPI = &coroapi;
1103 sv_setiv(sv, (IV)&coroapi); 1308 sv_setiv (sv, (IV)&coroapi);
1104 SvREADONLY_on(sv); 1309 SvREADONLY_on (sv);
1105 } 1310 }
1106} 1311}
1107 1312
1108#if !PERL_MICRO
1109
1110void 1313void
1111ready(self) 1314_set_current (SV *current)
1112 SV * self
1113 PROTOTYPE: $ 1315 PROTOTYPE: $
1114 CODE: 1316 CODE:
1115 api_ready (self); 1317 SvREFCNT_dec (SvRV (coro_current));
1116 1318 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1117#endif
1118 1319
1119int 1320int
1321prio (Coro::State coro, int newprio = 0)
1322 ALIAS:
1323 nice = 1
1324 CODE:
1325{
1326 RETVAL = coro->prio;
1327
1328 if (items > 1)
1329 {
1330 if (ix)
1331 newprio = coro->prio - newprio;
1332
1333 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1334 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1335
1336 coro->prio = newprio;
1337 }
1338}
1339 OUTPUT:
1340 RETVAL
1341
1342SV *
1343ready (SV *self)
1344 PROTOTYPE: $
1345 CODE:
1346 RETVAL = boolSV (api_ready (self));
1347 OUTPUT:
1348 RETVAL
1349
1350SV *
1351is_ready (SV *self)
1352 PROTOTYPE: $
1353 CODE:
1354 RETVAL = boolSV (api_is_ready (self));
1355 OUTPUT:
1356 RETVAL
1357
1358int
1120nready(...) 1359nready (...)
1121 PROTOTYPE: 1360 PROTOTYPE:
1122 CODE: 1361 CODE:
1123 RETVAL = coro_nready; 1362 RETVAL = coro_nready;
1124 OUTPUT: 1363 OUTPUT:
1125 RETVAL 1364 RETVAL
1126 1365
1366MODULE = Coro::State PACKAGE = Coro::AIO
1367
1368SV *
1369_get_state ()
1370 CODE:
1371{
1372 struct io_state *data;
1373
1374 RETVAL = newSV (sizeof (struct io_state));
1375 data = (struct io_state *)SvPVX (RETVAL);
1376 SvCUR_set (RETVAL, sizeof (struct io_state));
1377 SvPOK_only (RETVAL);
1378
1379 data->errorno = errno;
1380 data->laststype = PL_laststype;
1381 data->laststatval = PL_laststatval;
1382 data->statcache = PL_statcache;
1383}
1384 OUTPUT:
1385 RETVAL
1386
1127void 1387void
1128schedule(...) 1388_set_state (char *data_)
1129 PROTOTYPE: 1389 PROTOTYPE: $
1130 CODE: 1390 CODE:
1131 api_schedule (); 1391{
1392 struct io_state *data = (void *)data_;
1132 1393
1133void 1394 errno = data->errorno;
1134cede(...) 1395 PL_laststype = data->laststype;
1135 PROTOTYPE: 1396 PL_laststatval = data->laststatval;
1136 CODE: 1397 PL_statcache = data->statcache;
1137 api_cede (); 1398}
1138 1399

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