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Comparing Coro/Coro/State.xs (file contents):
Revision 1.72 by root, Wed Feb 1 23:59:41 2006 UTC vs.
Revision 1.140 by root, Sat Jan 20 19:52:15 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 */
33#include <signal.h> 71#ifndef SvRV_set
34 72# define SvRV_set(s,v) SvRV(s) = (v)
35#ifdef HAVE_MMAP
36# include <unistd.h>
37# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS
39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
41# else
42# undef HAVE_MMAP
43# endif
44# endif 73#endif
45#endif
46 74
47#define SUB_INIT "Coro::State::initialize" 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48#define UCORO_STATE "_coro_state" 76# undef STACKGUARD
77#endif
78
79#ifndef STACKGUARD
80# define STACKGUARD 0
81#endif
82
83/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0
86#endif
49 87
50/* 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
51 * 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
52 * and should be unique. */ 90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
53#define dSTACKLEVEL void *stacklevel = &stacklevel 92#define STACKLEVEL ((void *)&stacklevel)
54 93
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
56 95
57#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))
58 105
59#include "CoroAPI.h" 106#include "CoroAPI.h"
60 107
61#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 109static perl_mutex coro_mutex;
… …
65#else 112#else
66# define LOCK (void)0 113# define LOCK (void)0
67# define UNLOCK (void)0 114# define UNLOCK (void)0
68#endif 115#endif
69 116
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
70static struct CoroAPI coroapi; 126static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 127static AV *main_mainstack; /* used to differentiate between $main and others */
72static HV *coro_state_stash; 128static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 129static SV *coro_mortal; /* will be freed after next transfer */
76 130
77/* 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 */
78typedef struct { 135typedef struct coro_cctx {
79 int refcnt; /* pointer reference counter */ 136 struct coro_cctx *next;
80 int usecnt; /* shared by how many coroutines */
81 int gencnt; /* generation counter */
82 137
83 coro_context cctx; 138 /* the stack */
84
85 void *sptr; 139 void *sptr;
86 long ssize; /* positive == mmap, otherwise malloc */ 140 long ssize; /* positive == mmap, otherwise malloc */
87} coro_stack;
88 141
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 */
89struct coro { 163struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 164 /* the c coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 165 coro_cctx *cctx;
92
93 /* the optional C context */
94 coro_stack *stack;
95 void *cursp;
96 int gencnt;
97
98 /* optionally saved, might be zero */
99 AV *defav;
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack;
111 SV **stack_sp;
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 166
138 /* data associated with this coroutine (initial args) */ 167 /* data associated with this coroutine (initial args) */
139 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;
140}; 186};
141 187
142typedef struct coro *Coro__State; 188typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 189typedef struct coro *Coro__State_or_hashref;
144 190
145/* mostly copied from op.c:cv_clone2 */ 191/** Coro ********************************************************************/
146STATIC AV * 192
147clone_padlist (pTHX_ AV *protopadlist) 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
207static AV *
208coro_clone_padlist (CV *cv)
148{ 209{
149 AV *av; 210 AV *padlist = CvPADLIST (cv);
150 I32 ix;
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153 SV **pname = AvARRAY (protopad_name);
154 SV **ppad = AvARRAY (protopad);
155 I32 fname = AvFILLp (protopad_name);
156 I32 fpad = AvFILLp (protopad);
157 AV *newpadlist, *newpad_name, *newpad; 211 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 212
168 newpadlist = newAV (); 213 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 214 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 215#if PERL_VERSION_ATLEAST (5,9,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else
218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif
220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
221 --AvFILLp (padlist);
222
223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *) newpad); 224 av_store (newpadlist, 1, (SV *)newpad);
172
173 av = newAV (); /* will be @_ */
174 av_extend (av, 0);
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177
178 for (ix = fpad; ix > 0; ix--)
179 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182 if (namesv && namesv != &PL_sv_undef)
183 {
184 char *name = SvPVX (namesv); /* XXX */
185
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187 { /* lexical from outside? */
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201
202#ifdef SvPADBUSY
203 if (!SvPADBUSY (sv))
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221
222#if 0 /* return -ENOTUNDERSTOOD */
223 /* Now that vars are all in place, clone nested closures. */
224
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241 225
242 return newpadlist; 226 return newpadlist;
243} 227}
244 228
245STATIC void 229static void
246free_padlist (pTHX_ AV *padlist) 230free_padlist (AV *padlist)
247{ 231{
248 /* may be during global destruction */ 232 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 233 if (SvREFCNT (padlist))
250 { 234 {
251 I32 i = AvFILLp (padlist); 235 I32 i = AvFILLp (padlist);
… …
264 248
265 SvREFCNT_dec ((SV*)padlist); 249 SvREFCNT_dec ((SV*)padlist);
266 } 250 }
267} 251}
268 252
269STATIC int 253static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 254coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 255{
272 AV *padlist; 256 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 257 AV *av = (AV *)mg->mg_obj;
274 258
275 /* casting is fun. */ 259 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 261 free_padlist (padlist);
278 262
279 SvREFCNT_dec (av); 263 SvREFCNT_dec (av);
264
265 return 0;
280} 266}
281 267
282#define PERL_MAGIC_coro PERL_MAGIC_ext 268#define PERL_MAGIC_coro PERL_MAGIC_ext
283 269
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285 271
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
286/* the next two functions merely cache the padlists */ 279/* the next two functions merely cache the padlists */
287STATIC void 280static void
288get_padlist (pTHX_ CV *cv) 281get_padlist (CV *cv)
289{ 282{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 283 MAGIC *mg = CORO_MAGIC (cv);
284 AV *av;
291 285
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 288 else
289 {
290#if PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */
292 CV *cp = Perl_cv_clone (cv);
293 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp);
296#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 297 CvPADLIST (cv) = coro_clone_padlist (cv);
298#endif
299 }
296} 300}
297 301
298STATIC void 302static void
299put_padlist (pTHX_ CV *cv) 303put_padlist (CV *cv)
300{ 304{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 305 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av;
302 307
303 if (!mg) 308 if (!mg)
304 { 309 {
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro; 312 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV (); 313 mg->mg_obj = (SV *)newAV ();
309 } 314 }
310 315
311 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);
312} 322}
323
324/** load & save, init *******************************************************/
313 325
314#define SB do { 326#define SB do {
315#define SE } while (0) 327#define SE } while (0)
316 328
317#define LOAD(state) load_state(aTHX_ (state));
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
319
320#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
321 330
322static void 331static void
323load_state(pTHX_ Coro__State c) 332load_perl (Coro__State c)
324{ 333{
325 PL_dowarn = c->dowarn; 334#define VAR(name,type) PL_ ## name = c->name;
326 PL_in_eval = c->in_eval; 335# include "state.h"
327 336#undef VAR
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 337
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362 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 }
363 352
364 { 353 {
365 dSP; 354 dSP;
366 CV *cv; 355 CV *cv;
367 356
368 /* now do the ugly restore mess */ 357 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 358 while ((cv = (CV *)POPs))
370 { 359 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 360 put_padlist (cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 361 CvDEPTH (cv) = PTR2IV (POPs);
377 } 362 CvPADLIST (cv) = (AV *)POPs;
378
379 ++CvDEPTH(cv);
380 } 363 }
381 364
382 PUTBACK; 365 PUTBACK;
383 } 366 }
384} 367}
385 368
386static void 369static void
387save_state(pTHX_ Coro__State c, int flags) 370save_perl (Coro__State c)
388{ 371{
389 { 372 {
390 dSP; 373 dSP;
391 I32 cxix = cxstack_ix; 374 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 375 PERL_CONTEXT *ccstk = cxstack;
… …
395 /* 378 /*
396 * 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
397 * (and reinitialize) all cv's in the whole callchain :( 380 * (and reinitialize) all cv's in the whole callchain :(
398 */ 381 */
399 382
383 EXTEND (SP, 3 + 1);
400 PUSHs (Nullsv); 384 PUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 385 /* this loop was inspired by pp_caller */
402 for (;;) 386 for (;;)
403 { 387 {
404 while (cxix >= 0) 388 while (cxix >= 0)
405 { 389 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 390 PERL_CONTEXT *cx = &ccstk[cxix--];
407 391
408 if (CxTYPE(cx) == CXt_SUB) 392 if (CxTYPE (cx) == CXt_SUB)
409 { 393 {
410 CV *cv = cx->blk_sub.cv; 394 CV *cv = cx->blk_sub.cv;
395
411 if (CvDEPTH(cv)) 396 if (CvDEPTH (cv))
412 { 397 {
413 EXTEND (SP, CvDEPTH(cv)*2); 398 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 399 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 401 PUSHs ((SV *)cv);
424 402
425 get_padlist (aTHX_ cv); /* this is a monster */ 403 CvDEPTH (cv) = 0;
404 get_padlist (cv);
426 } 405 }
427 } 406 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 407 }
437 408
438 if (top_si->si_type == PERLSI_MAIN) 409 if (top_si->si_type == PERLSI_MAIN)
439 break; 410 break;
440 411
… …
444 } 415 }
445 416
446 PUTBACK; 417 PUTBACK;
447 } 418 }
448 419
449 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;
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
451 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;
452 424
453 c->dowarn = PL_dowarn; 425#define VAR(name,type)c->name = PL_ ## name;
454 c->in_eval = PL_in_eval; 426# include "state.h"
455 427#undef VAR
456 c->curstackinfo = PL_curstackinfo;
457 c->curstack = PL_curstack;
458 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp;
460 c->op = PL_op;
461 c->curpad = PL_curpad;
462 c->comppad = PL_comppad;
463 c->compcv = PL_compcv;
464 c->stack_base = PL_stack_base;
465 c->stack_max = PL_stack_max;
466 c->tmps_stack = PL_tmps_stack;
467 c->tmps_floor = PL_tmps_floor;
468 c->tmps_ix = PL_tmps_ix;
469 c->tmps_max = PL_tmps_max;
470 c->markstack = PL_markstack;
471 c->markstack_ptr = PL_markstack_ptr;
472 c->markstack_max = PL_markstack_max;
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif
484 c->curpm = PL_curpm;
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 428}
488 429
489/* 430/*
490 * allocate various perl stacks. This is an exact copy 431 * allocate various perl stacks. This is an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 432 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 433 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 434 * not usually need a lot of stackspace.
494 */ 435 */
495STATIC void 436#if PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks
438#else
439static void
496coro_init_stacks (pTHX) 440coro_init_stacks ()
497{ 441{
498 LOCK;
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
501 PL_curstackinfo->si_type = PERLSI_MAIN; 443 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 444 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 446
505 PL_stack_base = AvARRAY(PL_curstack); 447 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 448 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 450
509 New(50,PL_tmps_stack,96,SV*); 451 New(50,PL_tmps_stack,128,SV*);
510 PL_tmps_floor = -1; 452 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 453 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 454 PL_tmps_max = 128;
513 455
514 New(54,PL_markstack,16,I32); 456 New(54,PL_markstack,32,I32);
515 PL_markstack_ptr = PL_markstack; 457 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 458 PL_markstack_max = PL_markstack + 32;
517 459
518#ifdef SET_MARK_OFFSET 460#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 461 SET_MARK_OFFSET;
520#endif 462#endif
521 463
522 New(54,PL_scopestack,16,I32); 464 New(54,PL_scopestack,32,I32);
523 PL_scopestack_ix = 0; 465 PL_scopestack_ix = 0;
524 PL_scopestack_max = 16; 466 PL_scopestack_max = 32;
525 467
526 New(54,PL_savestack,96,ANY); 468 New(54,PL_savestack,64,ANY);
527 PL_savestack_ix = 0; 469 PL_savestack_ix = 0;
528 PL_savestack_max = 96; 470 PL_savestack_max = 64;
529 471
530#if PERL_VERSION < 9 472#if !PERL_VERSION_ATLEAST (5,9,0)
531 New(54,PL_retstack,8,OP*); 473 New(54,PL_retstack,16,OP*);
532 PL_retstack_ix = 0; 474 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 475 PL_retstack_max = 16;
534#endif 476#endif
535
536 UNLOCK;
537} 477}
478#endif
538 479
539/* 480/*
540 * destroy the stacks, the callchain etc... 481 * destroy the stacks, the callchain etc...
541 */ 482 */
542STATIC void 483static void
543destroy_stacks(pTHX) 484coro_destroy_stacks ()
544{ 485{
545 if (!IN_DESTRUCT) 486 if (!IN_DESTRUCT)
546 { 487 {
547 /* is this ugly, I ask? */ 488 /* restore all saved variables and stuff */
548 LEAVE_SCOPE (0); 489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
549 491
550 /* sure it is, but more important: is it correct?? :/ */ 492 /* free all temporaries */
551 FREETMPS; 493 FREETMPS;
494 assert (PL_tmps_ix == -1);
552 495
496 /* unwind all extra stacks */
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
554 } 501 }
555 502
556 while (PL_curstackinfo->si_next) 503 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 504 PL_curstackinfo = PL_curstackinfo->si_next;
558 505
559 while (PL_curstackinfo) 506 while (PL_curstackinfo)
560 { 507 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 508 PERL_SI *p = PL_curstackinfo->si_prev;
562 509
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 510 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 511 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 512
575 Safefree (PL_curstackinfo->si_cxstack); 513 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 514 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 515 PL_curstackinfo = p;
578 } 516 }
579 517
580 Safefree (PL_tmps_stack); 518 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 519 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 520 Safefree (PL_scopestack);
583 Safefree (PL_savestack); 521 Safefree (PL_savestack);
584#if PERL_VERSION < 9 522#if !PERL_VERSION_ATLEAST (5,9,0)
585 Safefree (PL_retstack); 523 Safefree (PL_retstack);
586#endif 524#endif
587} 525}
588 526
589static void 527/** coroutine stack handling ************************************************/
590allocate_stack (Coro__State ctx, int alloc)
591{
592 coro_stack *stack;
593 528
594 New (0, stack, 1, coro_stack);
595
596 stack->refcnt = 1;
597 stack->usecnt = 1;
598 stack->gencnt = ctx->gencnt = 0;
599
600 if (alloc)
601 {
602#if HAVE_MMAP
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 if (stack->sptr == (void *)-1)
606#endif
607 {
608 /*FIXME*//*D*//* reasonable stack size! */
609 stack->ssize = - (STACKSIZE * sizeof (long));
610 New (0, stack->sptr, STACKSIZE, long);
611 }
612 }
613 else
614 stack->sptr = 0;
615
616 ctx->stack = stack;
617}
618
619static void 529static void
620deallocate_stack (Coro__State ctx) 530setup_coro (struct coro *coro)
621{
622 coro_stack *stack = ctx->stack;
623
624 ctx->stack = 0;
625
626 if (stack)
627 {
628 if (!--stack->refcnt)
629 {
630#ifdef HAVE_MMAP
631 if (stack->ssize > 0 && stack->sptr)
632 munmap (stack->sptr, stack->ssize);
633 else
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 }
639 else if (ctx->gencnt == stack->gencnt)
640 --stack->usecnt;
641 }
642}
643
644static void
645setup_coro (void *arg)
646{ 531{
647 /* 532 /*
648 * emulate part of the perl startup here. 533 * emulate part of the perl startup here.
649 */ 534 */
650 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{
651 dSP; 581 dSP;
652 Coro__State ctx = (Coro__State)arg; 582 LOGOP myop;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 583
655 coro_init_stacks (aTHX); 584 Zero (&myop, 1, LOGOP);
656 /*PL_curcop = 0;*/ 585 myop.op_next = PL_op;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 587
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);
661 SPAGAIN; 595 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP);
668 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671 if (SvTRUE (ERRSV))
672 croak (NULL);
673 else
674 croak ("FATAL: CCTXT coroutine returned!");
675 }
676 else
677 {
678 UNOP myop;
679
680 PL_op = (OP *)&myop;
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701} 596}
702 597
703static void 598static void
704continue_coro (void *arg) 599coro_run (void *arg)
705{ 600{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK;
603
706 /* 604 /*
707 * this is a _very_ stripped down perl interpreter ;) 605 * this is a _very_ stripped down perl interpreter ;)
708 */ 606 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env; 607 PL_top_env = &PL_start_env;
714 608
715 ctx->cursp = 0; 609 /* inject call to cctx_init */
716 PL_op = PL_op->op_next; 610 prepare_cctx ((coro_cctx *)arg);
717 CALLRUNOPS(aTHX);
718 611
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);
719 abort (); 617 abort ();
720} 618}
721 619
722STATIC void 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
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
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 734transfer (struct coro *prev, struct coro *next)
724{ 735{
725 dSTACKLEVEL; 736 dSTACKLEVEL;
726 737
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 }
727 if (prev != next) 744 else if (prev != next)
728 { 745 {
729 if (next->mainstack) 746 coro_cctx *prev__cctx;
747
748 if (prev->flags & CF_NEW)
730 { 749 {
731 LOCK; 750 /* create a new empty context */
732 SAVE (prev, flags); 751 Newz (0, prev->cctx, 1, coro_cctx);
733 LOAD (next); 752 prev->cctx->inuse = 1;
734 UNLOCK; 753 prev->flags &= ~CF_NEW;
735 754 prev->flags |= CF_RUNNING;
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 {
743 if (!prev->stack)
744 allocate_stack (prev, 0);
745 else if (prev->cursp != stacklevel
746 && prev->stack->usecnt > 1)
747 {
748 prev->gencnt = ++prev->stack->gencnt;
749 prev->stack->usecnt = 1;
750 }
751
752 /* has our stack been invalidated? */
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 {
755 deallocate_stack (next);
756 allocate_stack (next, 1);
757 coro_create (&(next->stack->cctx),
758 continue_coro, (void *)next,
759 next->stack->sptr, labs (next->stack->ssize));
760 }
761
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 }
766 else
767 next->cursp = stacklevel;
768 } 755 }
769 else if (next->tmps_ix == -2) 756
770 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 }
771 else 783 else
772 { 784 {
773 LOCK; 785 /* coroutine already started */
774 SAVE (prev, -1); /* first get rid of the old state */ 786 save_perl (prev);
775 UNLOCK; 787 load_perl (next);
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 {
779 if (!prev->stack)
780 allocate_stack (prev, 0);
781
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 {
784 PL_top_env = &next->start_env;
785
786 setup_coro (next);
787 next->cursp = stacklevel;
788
789 prev->stack->refcnt++;
790 prev->stack->usecnt++;
791 next->stack = prev->stack;
792 next->gencnt = prev->gencnt;
793 }
794 else
795 {
796 assert (!next->stack);
797 allocate_stack (next, 1);
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 }
805 }
806 else
807 {
808 setup_coro (next);
809 next->cursp = stacklevel;
810 }
811 } 788 }
812 }
813 789
814 LOCK; 790 prev__cctx = prev->cctx;
815 if (coro_mortal) 791
816 { 792 /* possibly "free" the cctx */
817 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
818 coro_mortal = 0; 818 free_coro_mortal ();
819 }
820 UNLOCK; 819 UNLOCK;
820 }
821} 821}
822 822
823#define SV_CORO(sv,func) \ 823struct transfer_args
824 do { \ 824{
825 if (SvROK (sv)) \ 825 struct coro *prev, *next;
826 sv = SvRV (sv); \ 826};
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843 827
844#define SvSTATE(sv) (struct coro *)SvIV (sv) 828#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
845 829
830/** high level stuff ********************************************************/
831
846static void 832static int
833coro_state_destroy (struct coro *coro)
834{
835 if (coro->flags & CF_DESTROYED)
836 return 0;
837
838 coro->flags |= CF_DESTROYED;
839
840 if (coro->flags & CF_READY)
841 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove the coro */
844 LOCK;
845 --coro_nready;
846 UNLOCK;
847 }
848 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850
851 if (coro->mainstack && coro->mainstack != main_mainstack)
852 {
853 struct coro temp;
854
855 assert (!(coro->flags & CF_RUNNING));
856
857 Zero (&temp, 1, struct coro);
858 temp.save = CORO_SAVE_ALL;
859
860 if (coro->flags & CF_RUNNING)
861 croak ("FATAL: tried to destroy currently running coroutine");
862
863 save_perl (&temp);
864 load_perl (coro);
865
866 coro_destroy_stacks ();
867
868 load_perl (&temp); /* this will get rid of defsv etc.. */
869
870 coro->mainstack = 0;
871 }
872
873 cctx_destroy (coro->cctx);
874 SvREFCNT_dec (coro->args);
875
876 return 1;
877}
878
879static int
880coro_state_free (pTHX_ SV *sv, MAGIC *mg)
881{
882 struct coro *coro = (struct coro *)mg->mg_ptr;
883 mg->mg_ptr = 0;
884
885 if (--coro->refcnt < 0)
886 {
887 coro_state_destroy (coro);
888 Safefree (coro);
889 }
890
891 return 0;
892}
893
894static int
895coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
896{
897 struct coro *coro = (struct coro *)mg->mg_ptr;
898
899 ++coro->refcnt;
900
901 return 0;
902}
903
904static MGVTBL coro_state_vtbl = {
905 0, 0, 0, 0,
906 coro_state_free,
907 0,
908#ifdef MGf_DUP
909 coro_state_dup,
910#else
911# define MGf_DUP 0
912#endif
913};
914
915static struct coro *
916SvSTATE (SV *coro)
917{
918 HV *stash;
919 MAGIC *mg;
920
921 if (SvROK (coro))
922 coro = SvRV (coro);
923
924 stash = SvSTASH (coro);
925 if (stash != coro_stash && stash != coro_state_stash)
926 {
927 /* very slow, but rare, check */
928 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
929 croak ("Coro::State object required");
930 }
931
932 mg = SvMAGIC (coro);
933 assert (mg->mg_type == PERL_MAGIC_ext);
934 return (struct coro *)mg->mg_ptr;
935}
936
937static void
938prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
939{
940 ta->prev = SvSTATE (prev_sv);
941 ta->next = SvSTATE (next_sv);
942}
943
944static void
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 945api_transfer (SV *prev_sv, SV *next_sv)
848{ 946{
849 SV_CORO (prev, "Coro::transfer"); 947 struct transfer_args ta;
850 SV_CORO (next, "Coro::transfer");
851 948
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 949 prepare_transfer (&ta, prev_sv, next_sv);
950 TRANSFER (ta);
951}
952
953static int
954api_save (SV *coro_sv, int new_save)
955{
956 struct coro *coro = SvSTATE (coro_sv);
957 int old_save = coro->save;
958
959 if (new_save >= 0)
960 coro->save = new_save;
961
962 return old_save;
853} 963}
854 964
855/** Coro ********************************************************************/ 965/** Coro ********************************************************************/
856 966
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 967static void
870coro_enq (pTHX_ SV *sv) 968coro_enq (SV *coro_sv)
871{ 969{
872 if (SvTYPE (sv) == SVt_PVHV)
873 {
874 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
875 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
876
877 prio = prio > PRIO_MAX ? PRIO_MAX
878 : prio < PRIO_MIN ? PRIO_MIN
879 : prio;
880
881 av_push (coro_ready [prio - PRIO_MIN], sv); 970 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
882 coro_nready++;
883
884 return;
885 }
886
887 croak ("Coro::ready tried to enqueue something that is not a coroutine");
888} 971}
889 972
890static SV * 973static SV *
891coro_deq (pTHX_ int min_prio) 974coro_deq (int min_prio)
892{ 975{
893 int prio = PRIO_MAX - PRIO_MIN; 976 int prio = PRIO_MAX - PRIO_MIN;
894 977
895 min_prio -= PRIO_MIN; 978 min_prio -= PRIO_MIN;
896 if (min_prio < 0) 979 if (min_prio < 0)
897 min_prio = 0; 980 min_prio = 0;
898 981
899 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 982 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
900 if (av_len (coro_ready[prio]) >= 0) 983 if (AvFILLp (coro_ready [prio]) >= 0)
901 {
902 coro_nready--;
903 return av_shift (coro_ready[prio]); 984 return av_shift (coro_ready [prio]);
904 }
905 985
906 return 0; 986 return 0;
907} 987}
908 988
909static void 989static int
910api_ready (SV *coro) 990api_ready (SV *coro_sv)
911{ 991{
912 dTHX; 992 struct coro *coro;
913 993
914 if (SvROK (coro)) 994 if (SvROK (coro_sv))
915 coro = SvRV (coro); 995 coro_sv = SvRV (coro_sv);
996
997 coro = SvSTATE (coro_sv);
998
999 if (coro->flags & CF_READY)
1000 return 0;
1001
1002 coro->flags |= CF_READY;
916 1003
917 LOCK; 1004 LOCK;
918 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1005 coro_enq (SvREFCNT_inc (coro_sv));
1006 ++coro_nready;
919 UNLOCK; 1007 UNLOCK;
1008
1009 return 1;
1010}
1011
1012static int
1013api_is_ready (SV *coro_sv)
1014{
1015 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1016}
1017
1018static void
1019prepare_schedule (struct transfer_args *ta)
1020{
1021 SV *prev_sv, *next_sv;
1022
1023 for (;;)
1024 {
1025 LOCK;
1026 next_sv = coro_deq (PRIO_MIN);
1027
1028 /* nothing to schedule: call the idle handler */
1029 if (!next_sv)
1030 {
1031 dSP;
1032 UNLOCK;
1033
1034 ENTER;
1035 SAVETMPS;
1036
1037 PUSHMARK (SP);
1038 PUTBACK;
1039 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1040
1041 FREETMPS;
1042 LEAVE;
1043 continue;
1044 }
1045
1046 ta->next = SvSTATE (next_sv);
1047
1048 /* cannot transfer to destroyed coros, skip and look for next */
1049 if (ta->next->flags & CF_DESTROYED)
1050 {
1051 UNLOCK;
1052 SvREFCNT_dec (next_sv);
1053 /* coro_nready is already taken care of by destroy */
1054 continue;
1055 }
1056
1057 --coro_nready;
1058 UNLOCK;
1059 break;
1060 }
1061
1062 /* free this only after the transfer */
1063 prev_sv = SvRV (coro_current);
1064 SvRV_set (coro_current, next_sv);
1065 ta->prev = SvSTATE (prev_sv);
1066
1067 assert (ta->next->flags & CF_READY);
1068 ta->next->flags &= ~CF_READY;
1069
1070 LOCK;
1071 free_coro_mortal ();
1072 coro_mortal = prev_sv;
1073 UNLOCK;
1074}
1075
1076static void
1077prepare_cede (struct transfer_args *ta)
1078{
1079 api_ready (coro_current);
1080 prepare_schedule (ta);
1081}
1082
1083static int
1084prepare_cede_notself (struct transfer_args *ta)
1085{
1086 if (coro_nready)
1087 {
1088 SV *prev = SvRV (coro_current);
1089 prepare_schedule (ta);
1090 api_ready (prev);
1091 return 1;
1092 }
1093 else
1094 return 0;
920} 1095}
921 1096
922static void 1097static void
923api_schedule (void) 1098api_schedule (void)
924{ 1099{
925 dTHX; 1100 struct transfer_args ta;
926 1101
927 SV *prev, *next; 1102 prepare_schedule (&ta);
928 1103 TRANSFER (ta);
929 LOCK;
930
931 prev = SvRV (GvSV (coro_current));
932 next = coro_deq (aTHX_ PRIO_MIN);
933
934 if (!next)
935 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
936
937 /* free this only after the transfer */
938 coro_mortal = prev;
939 SV_CORO (prev, "Coro::schedule");
940
941 SvRV (GvSV (coro_current)) = next;
942
943 SV_CORO (next, "Coro::schedule");
944
945 UNLOCK;
946
947 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
948 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
949} 1104}
950 1105
951static void 1106static int
952api_cede (void) 1107api_cede (void)
953{ 1108{
954 dTHX; 1109 struct transfer_args ta;
955 1110
956 LOCK; 1111 prepare_cede (&ta);
957 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
958 UNLOCK;
959 1112
960 api_schedule (); 1113 if (ta.prev != ta.next)
1114 {
1115 TRANSFER (ta);
1116 return 1;
1117 }
1118 else
1119 return 0;
1120}
1121
1122static int
1123api_cede_notself (void)
1124{
1125 struct transfer_args ta;
1126
1127 if (prepare_cede_notself (&ta))
1128 {
1129 TRANSFER (ta);
1130 return 1;
1131 }
1132 else
1133 return 0;
961} 1134}
962 1135
963MODULE = Coro::State PACKAGE = Coro::State 1136MODULE = Coro::State PACKAGE = Coro::State
964 1137
965PROTOTYPES: ENABLE 1138PROTOTYPES: DISABLE
966 1139
967BOOT: 1140BOOT:
968{ /* {} necessary for stoopid perl-5.6.x */ 1141{
969#ifdef USE_ITHREADS 1142#ifdef USE_ITHREADS
970 MUTEX_INIT (&coro_mutex); 1143 MUTEX_INIT (&coro_mutex);
971#endif 1144#endif
1145 BOOT_PAGESIZE;
972 1146
973 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
974 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
975 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1147 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976 1148
977 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1149 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
978 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1150 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
979 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1151 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1152 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
980 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1153 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
981 1154
982 main_mainstack = PL_mainstack; 1155 main_mainstack = PL_mainstack;
983 1156
984 coroapi.ver = CORO_API_VERSION; 1157 coroapi.ver = CORO_API_VERSION;
985 coroapi.transfer = api_transfer; 1158 coroapi.transfer = api_transfer;
986}
987 1159
988Coro::State 1160 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
989_newprocess(args) 1161}
990 SV * args 1162
991 PROTOTYPE: $ 1163SV *
1164new (char *klass, ...)
992 CODE: 1165 CODE:
993 Coro__State coro; 1166{
1167 struct coro *coro;
1168 HV *hv;
1169 int i;
994 1170
995 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996 croak ("Coro::State::_newprocess expects an arrayref");
997
998 Newz (0, coro, 1, struct coro); 1171 Newz (0, coro, 1, struct coro);
1172 coro->args = newAV ();
1173 coro->save = CORO_SAVE_ALL;
1174 coro->flags = CF_NEW;
999 1175
1000 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1176 hv = newHV ();
1001 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1177 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1002 /*coro->stack = 0;*/ 1178 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1003 1179
1004 /* same as JMPENV_BOOTSTRAP */ 1180 for (i = 1; i < items; i++)
1005 /* we might be able to recycle start_env, but safe is safe */ 1181 av_push (coro->args, newSVsv (ST (i)));
1006 /*Zero(&coro->start_env, 1, JMPENV);*/ 1182}
1007 coro->start_env.je_ret = -1;
1008 coro->start_env.je_mustcatch = TRUE;
1009
1010 RETVAL = coro;
1011 OUTPUT: 1183 OUTPUT:
1012 RETVAL 1184 RETVAL
1013 1185
1186int
1187save (SV *coro, int new_save = -1)
1188 CODE:
1189 RETVAL = api_save (coro, new_save);
1190 OUTPUT:
1191 RETVAL
1192
1014void 1193void
1015transfer(prev, next, flags) 1194_set_stacklevel (...)
1016 SV *prev 1195 ALIAS:
1017 SV *next 1196 Coro::State::transfer = 1
1018 int flags 1197 Coro::schedule = 2
1019 PROTOTYPE: @ 1198 Coro::cede = 3
1199 Coro::cede_notself = 4
1020 CODE: 1200 CODE:
1021 PUTBACK; 1201{
1022 SV_CORO (next, "Coro::transfer"); 1202 struct transfer_args ta;
1023 SV_CORO (prev, "Coro::transfer"); 1203
1024 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1204 switch (ix)
1025 SPAGAIN; 1205 {
1206 case 0:
1207 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1208 ta.next = 0;
1209 break;
1210
1211 case 1:
1212 if (items != 2)
1213 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1214
1215 prepare_transfer (&ta, ST (0), ST (1));
1216 break;
1217
1218 case 2:
1219 prepare_schedule (&ta);
1220 break;
1221
1222 case 3:
1223 prepare_cede (&ta);
1224 break;
1225
1226 case 4:
1227 if (!prepare_cede_notself (&ta))
1228 XSRETURN_EMPTY;
1229
1230 break;
1231 }
1232
1233 BARRIER;
1234 TRANSFER (ta);
1235
1236 if (GIMME_V != G_VOID && ta.next != ta.prev)
1237 XSRETURN_YES;
1238}
1239
1240bool
1241_destroy (SV *coro_sv)
1242 CODE:
1243 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1244 OUTPUT:
1245 RETVAL
1026 1246
1027void 1247void
1028DESTROY(coro)
1029 Coro::State coro
1030 CODE:
1031
1032 if (coro->mainstack && coro->mainstack != main_mainstack)
1033 {
1034 struct coro temp;
1035
1036 PUTBACK;
1037 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1038 LOAD (aTHX_ coro);
1039 SPAGAIN;
1040
1041 destroy_stacks (aTHX);
1042
1043 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044 SPAGAIN;
1045
1046 coro->mainstack = 0;
1047 }
1048
1049 deallocate_stack (coro);
1050 SvREFCNT_dec (coro->args);
1051 Safefree (coro);
1052
1053void
1054_exit(code) 1248_exit (code)
1055 int code 1249 int code
1056 PROTOTYPE: $ 1250 PROTOTYPE: $
1057 CODE: 1251 CODE:
1058 _exit (code); 1252 _exit (code);
1059 1253
1060MODULE = Coro::State PACKAGE = Coro::Cont 1254int
1255cctx_count ()
1256 CODE:
1257 RETVAL = cctx_count;
1258 OUTPUT:
1259 RETVAL
1061 1260
1062# this is slightly dirty (should expose a c-level api) 1261int
1063 1262cctx_idle ()
1064void 1263 CODE:
1065yield(...) 1264 RETVAL = cctx_idle;
1066 PROTOTYPE: @ 1265 OUTPUT:
1067 CODE: 1266 RETVAL
1068 SV *yieldstack;
1069 SV *sv;
1070 AV *defav = GvAV (PL_defgv);
1071 struct coro *prev, *next;
1072
1073 yieldstack = *hv_fetch (
1074 (HV *)SvRV (GvSV (coro_current)),
1075 "yieldstack", sizeof ("yieldstack") - 1,
1076 0
1077 );
1078
1079 /* set up @_ -- ugly */
1080 av_clear (defav);
1081 av_fill (defav, items - 1);
1082 while (items--)
1083 av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085 sv = av_pop ((AV *)SvRV (yieldstack));
1086 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088 SvREFCNT_dec (sv);
1089
1090 transfer (aTHX_ prev, next, 0);
1091 1267
1092MODULE = Coro::State PACKAGE = Coro 1268MODULE = Coro::State PACKAGE = Coro
1093 1269
1094# this is slightly dirty (should expose a c-level api)
1095
1096BOOT: 1270BOOT:
1097{ 1271{
1098 int i; 1272 int i;
1273
1099 HV *stash = gv_stashpv ("Coro", TRUE); 1274 coro_stash = gv_stashpv ("Coro", TRUE);
1100 1275
1101 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1276 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1277 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1278 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1279 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1280 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1281 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107 1282
1108 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1283 coro_current = get_sv ("Coro::current", FALSE);
1109 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1284 SvREADONLY_on (coro_current);
1110 1285
1111 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1286 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1112 coro_ready[i] = newAV (); 1287 coro_ready[i] = newAV ();
1113 1288
1114 { 1289 {
1115 SV *sv = perl_get_sv("Coro::API", 1); 1290 SV *sv = perl_get_sv("Coro::API", 1);
1116 1291
1117 coroapi.schedule = api_schedule; 1292 coroapi.schedule = api_schedule;
1293 coroapi.save = api_save;
1118 coroapi.cede = api_cede; 1294 coroapi.cede = api_cede;
1295 coroapi.cede_notself = api_cede_notself;
1119 coroapi.ready = api_ready; 1296 coroapi.ready = api_ready;
1297 coroapi.is_ready = api_is_ready;
1120 coroapi.nready = &coro_nready; 1298 coroapi.nready = &coro_nready;
1121 coroapi.current = coro_current; 1299 coroapi.current = coro_current;
1122 1300
1123 GCoroAPI = &coroapi; 1301 GCoroAPI = &coroapi;
1124 sv_setiv(sv, (IV)&coroapi); 1302 sv_setiv (sv, (IV)&coroapi);
1125 SvREADONLY_on(sv); 1303 SvREADONLY_on (sv);
1126 } 1304 }
1127} 1305}
1128 1306
1129#if !PERL_MICRO
1130
1131void 1307void
1132ready(self) 1308_set_current (SV *current)
1133 SV * self
1134 PROTOTYPE: $ 1309 PROTOTYPE: $
1135 CODE: 1310 CODE:
1136 api_ready (self); 1311 SvREFCNT_dec (SvRV (coro_current));
1137 1312 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1138#endif
1139 1313
1140int 1314int
1315prio (Coro::State coro, int newprio = 0)
1316 ALIAS:
1317 nice = 1
1318 CODE:
1319{
1320 RETVAL = coro->prio;
1321
1322 if (items > 1)
1323 {
1324 if (ix)
1325 newprio = coro->prio - newprio;
1326
1327 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1328 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1329
1330 coro->prio = newprio;
1331 }
1332}
1333 OUTPUT:
1334 RETVAL
1335
1336SV *
1337ready (SV *self)
1338 PROTOTYPE: $
1339 CODE:
1340 RETVAL = boolSV (api_ready (self));
1341 OUTPUT:
1342 RETVAL
1343
1344SV *
1345is_ready (SV *self)
1346 PROTOTYPE: $
1347 CODE:
1348 RETVAL = boolSV (api_is_ready (self));
1349 OUTPUT:
1350 RETVAL
1351
1352int
1141nready(...) 1353nready (...)
1142 PROTOTYPE: 1354 PROTOTYPE:
1143 CODE: 1355 CODE:
1144 RETVAL = coro_nready; 1356 RETVAL = coro_nready;
1145 OUTPUT: 1357 OUTPUT:
1146 RETVAL 1358 RETVAL
1147 1359
1148void 1360MODULE = Coro::State PACKAGE = Coro::AIO
1149schedule(...) 1361
1150 PROTOTYPE: 1362SV *
1363_get_state ()
1151 CODE: 1364 CODE:
1152 api_schedule ();
1153
1154void
1155cede(...)
1156 PROTOTYPE:
1157 CODE:
1158 api_cede ();
1159
1160# and these are hacks
1161SV *
1162_aio_get_state ()
1163 CODE:
1164{ 1365{
1165 struct { 1366 struct io_state *data;
1166 int errorno;
1167 int laststype;
1168 int laststatval;
1169 Stat_t statcache;
1170 } data;
1171 1367
1368 RETVAL = newSV (sizeof (struct io_state));
1369 data = (struct io_state *)SvPVX (RETVAL);
1370 SvCUR_set (RETVAL, sizeof (struct io_state));
1371 SvPOK_only (RETVAL);
1372
1172 data.errorno = errno; 1373 data->errorno = errno;
1173 data.laststype = PL_laststype; 1374 data->laststype = PL_laststype;
1174 data.laststatval = PL_laststatval; 1375 data->laststatval = PL_laststatval;
1175 data.statcache = PL_statcache; 1376 data->statcache = PL_statcache;
1176
1177 RETVAL = newSVpvn ((char *)&data, sizeof data);
1178} 1377}
1179 OUTPUT: 1378 OUTPUT:
1180 RETVAL 1379 RETVAL
1181 1380
1182void 1381void
1183_aio_set_state (char *data_) 1382_set_state (char *data_)
1184 PROTOTYPE: $ 1383 PROTOTYPE: $
1185 CODE: 1384 CODE:
1186{ 1385{
1187 struct { 1386 struct io_state *data = (void *)data_;
1188 int errorno;
1189 int laststype;
1190 int laststatval;
1191 Stat_t statcache;
1192 } *data = (void *)data_;
1193 1387
1194 errno = data->errorno; 1388 errno = data->errorno;
1195 PL_laststype = data->laststype; 1389 PL_laststype = data->laststype;
1196 PL_laststatval = data->laststatval; 1390 PL_laststatval = data->laststatval;
1197 PL_statcache = data->statcache; 1391 PL_statcache = data->statcache;
1198} 1392}
1393

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