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Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC

1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c"
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#if 1 9#include "patchlevel.h"
6# define CHK(x) (void *)0 10
11#if PERL_VERSION < 6
12# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr
14# endif
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31
32#include <stdio.h>
33#include <errno.h>
34
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD
37#endif
38
39#ifndef STACKGUARD
40# define STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif
52# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif
61#endif
62
63/* The next macro should declare a variable stacklevel that contains and approximation
64 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel)
68
69#define IN_DESTRUCT (PL_main_cv == Nullcv)
70
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
74
75#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76
77#ifdef USE_ITHREADS
78static perl_mutex coro_mutex;
79# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
7#else 81#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 82# define LOCK (void)0
83# define UNLOCK (void)0
9#endif 84#endif
10 85
11#define MAY_FLUSH /* increases codesize */ 86static struct CoroAPI coroapi;
87static AV *main_mainstack; /* used to differentiate between $main and others */
88static HV *coro_state_stash, *coro_stash;
89static SV *coro_mortal; /* will be freed after next transfer */
12 90
13#define SAVE_DEFAV 0x00000001 91/* this is a structure representing a c-level coroutine */
14#define SAVE_DEFSV 0x00000002 92typedef struct coro_stack {
15#define SAVE_ERRSV 0x00000004 93 struct coro_stack *next;
16 94
17#define SAVE_ALL -1 95 /* the stack */
96 void *sptr;
97 long ssize; /* positive == mmap, otherwise malloc */
18 98
99 /* cpu state */
100 void *idle_sp; /* original stacklevel when coroutine was created */
101 JMPENV *top_env;
102 coro_context cctx;
103} coro_stack;
104
105/* the (fake) coro_stack representing the main program */
106static coro_stack *main_stack;
107
108/* this is a structure representing a perl-level coroutine */
19struct coro { 109struct coro {
110 /* the c coroutine allocated to this perl coroutine, if any */
111 coro_stack *stack;
112
113 /* data associated with this coroutine (initial args) */
114 AV *args;
115 int refcnt;
116
20 /* optionally saved, might be zero */ 117 /* optionally saved, might be zero */
21 AV *defav; 118 AV *defav;
22 SV *defsv; 119 SV *defsv;
23 SV *errsv; 120 SV *errsv;
24 121
25 /* saved global state not related to stacks */ 122 /* saved global state not related to stacks */
26 U8 dowarn; 123 U8 dowarn;
124 I32 in_eval;
27 125
28 /* the stacks and related info (callchain etc..) */ 126 /* the stacks and related info (callchain etc..) */
29 PERL_SI *curstackinfo; 127 PERL_SI *curstackinfo;
30 AV *curstack; 128 AV *curstack;
31 AV *mainstack; 129 AV *mainstack;
32 SV **stack_sp; 130 SV **stack_sp;
33 OP *op; 131 OP *op;
34 SV **curpad; 132 SV **curpad;
133 AV *comppad;
134 CV *compcv;
35 SV **stack_base; 135 SV **stack_base;
36 SV **stack_max; 136 SV **stack_max;
37 SV **tmps_stack; 137 SV **tmps_stack;
38 I32 tmps_floor; 138 I32 tmps_floor;
39 I32 tmps_ix; 139 I32 tmps_ix;
… …
48 I32 savestack_ix; 148 I32 savestack_ix;
49 I32 savestack_max; 149 I32 savestack_max;
50 OP **retstack; 150 OP **retstack;
51 I32 retstack_ix; 151 I32 retstack_ix;
52 I32 retstack_max; 152 I32 retstack_max;
153 PMOP *curpm;
53 COP *curcop; 154 COP *curcop;
54 155
55 /* data associated with this coroutine (initial args) */ 156 /* coro process data */
56 AV *args; 157 int prio;
57}; 158};
58 159
59typedef struct coro *Coro__State; 160typedef struct coro *Coro__State;
60typedef struct coro *Coro__State_or_hashref; 161typedef struct coro *Coro__State_or_hashref;
61 162
62static HV *padlist_cache; 163static AV *
63 164coro_clone_padlist (pTHX_ CV *cv)
64/* mostly copied from op.c:cv_clone2 */
65STATIC AV *
66clone_padlist (AV *protopadlist)
67{ 165{
68 AV *av; 166 AV *padlist = CvPADLIST (cv);
69 I32 ix;
70 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
71 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
72 SV **pname = AvARRAY (protopad_name);
73 SV **ppad = AvARRAY (protopad);
74 I32 fname = AvFILLp (protopad_name);
75 I32 fpad = AvFILLp (protopad);
76 AV *newpadlist, *newpad_name, *newpad; 167 AV *newpadlist, *newpad;
77 SV **npad;
78
79 newpad_name = newAV ();
80 for (ix = fname; ix >= 0; ix--)
81 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
82
83 newpad = newAV ();
84 av_fill (newpad, AvFILLp (protopad));
85 npad = AvARRAY (newpad);
86 168
87 newpadlist = newAV (); 169 newpadlist = newAV ();
88 AvREAL_off (newpadlist); 170 AvREAL_off (newpadlist);
89 av_store (newpadlist, 0, (SV *) newpad_name); 171#if PERL_VERSION < 9
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173#else
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#endif
176 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177 --AvFILLp (padlist);
178
179 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
90 av_store (newpadlist, 1, (SV *) newpad); 180 av_store (newpadlist, 1, (SV *)newpad);
91 181
92 av = newAV (); /* will be @_ */ 182 return newpadlist;
93 av_extend (av, 0); 183}
94 av_store (newpad, 0, (SV *) av);
95 AvFLAGS (av) = AVf_REIFY;
96 184
97 for (ix = fpad; ix > 0; ix--) 185static void
186free_padlist (pTHX_ AV *padlist)
187{
188 /* may be during global destruction */
189 if (SvREFCNT (padlist))
98 { 190 {
99 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 191 I32 i = AvFILLp (padlist);
100 if (namesv && namesv != &PL_sv_undef) 192 while (i >= 0)
101 { 193 {
102 char *name = SvPVX (namesv); /* XXX */ 194 SV **svp = av_fetch (padlist, i--, FALSE);
103 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 195 if (svp)
104 { /* lexical from outside? */
105 npad[ix] = SvREFCNT_inc (ppad[ix]);
106 } 196 {
107 else
108 { /* our own lexical */
109 SV *sv; 197 SV *sv;
110 if (*name == '&') 198 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
111 sv = SvREFCNT_inc (ppad[ix]); 199 SvREFCNT_dec (sv);
112 else if (*name == '@') 200
113 sv = (SV *) newAV (); 201 SvREFCNT_dec (*svp);
114 else if (*name == '%')
115 sv = (SV *) newHV ();
116 else
117 sv = NEWSV (0, 0);
118 if (!SvPADBUSY (sv))
119 SvPADMY_on (sv);
120 npad[ix] = sv;
121 } 202 }
122 } 203 }
123 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 204
124 { 205 SvREFCNT_dec ((SV*)padlist);
125 npad[ix] = SvREFCNT_inc (ppad[ix]);
126 }
127 else
128 {
129 SV *sv = NEWSV (0, 0);
130 SvPADTMP_on (sv);
131 npad[ix] = sv;
132 }
133 } 206 }
207}
134 208
135#if 0 /* return -ENOTUNDERSTOOD */ 209static int
136 /* Now that vars are all in place, clone nested closures. */ 210coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
211{
212 AV *padlist;
213 AV *av = (AV *)mg->mg_obj;
137 214
138 for (ix = fpad; ix > 0; ix--) { 215 /* casting is fun. */
139 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 216 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
140 if (namesv 217 free_padlist (aTHX_ padlist);
141 && namesv != &PL_sv_undef 218
142 && !(SvFLAGS(namesv) & SVf_FAKE) 219 SvREFCNT_dec (av);
143 && *SvPVX(namesv) == '&' 220
144 && CvCLONE(ppad[ix])) 221 return 0;
145 { 222}
146 CV *kid = cv_clone((CV*)ppad[ix]); 223
147 SvREFCNT_dec(ppad[ix]); 224#define PERL_MAGIC_coro PERL_MAGIC_ext
148 CvCLONE_on(kid); 225
149 SvPADMY_on(kid); 226static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
150 npad[ix] = (SV*)kid; 227
151 } 228/* the next two functions merely cache the padlists */
229static void
230get_padlist (pTHX_ CV *cv)
231{
232 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
233
234 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
235 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
236 else
237 {
238#if 0
239 /* this should work - but it doesn't :( */
240 CV *cp = Perl_cv_clone (aTHX_ cv);
241 CvPADLIST (cv) = CvPADLIST (cp);
242 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (cp);
244#else
245 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
246#endif
247 }
248}
249
250static void
251put_padlist (pTHX_ CV *cv)
252{
253 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254
255 if (!mg)
256 {
257 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259 mg->mg_virtual = &vtbl_coro;
260 mg->mg_obj = (SV *)newAV ();
152 } 261 }
153#endif
154 262
155 return newpadlist;
156}
157
158#ifdef MAY_FLUSH
159STATIC AV *
160free_padlist (AV *padlist)
161{
162 /* may be during global destruction */
163 if (SvREFCNT(padlist))
164 {
165 I32 i = AvFILLp(padlist);
166 while (i >= 0)
167 {
168 SV **svp = av_fetch(padlist, i--, FALSE);
169 SV *sv = svp ? *svp : Nullsv;
170 if (sv)
171 SvREFCNT_dec(sv);
172 }
173
174 SvREFCNT_dec((SV*)padlist);
175 }
176}
177#endif
178
179/* the next two functions merely cache the padlists */
180STATIC void
181get_padlist (CV *cv)
182{
183 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
184
185 if (he && AvFILLp ((AV *)*he) >= 0)
186 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
187 else
188 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
189}
190
191STATIC void
192put_padlist (CV *cv)
193{
194 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
195
196 if (SvTYPE (*he) != SVt_PVAV)
197 {
198 SvREFCNT_dec (*he);
199 *he = (SV *)newAV ();
200 }
201
202 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 263 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
203} 264}
204
205#ifdef MAY_FLUSH
206STATIC void
207flush_padlist_cache ()
208{
209 HV *hv = padlist_cache;
210 padlist_cache = newHV ();
211
212 if (hv_iterinit (hv))
213 {
214 HE *he;
215 AV *padlist;
216
217 while (!!(he = hv_iternext (hv)))
218 {
219 AV *av = (AV *)HeVAL(he);
220
221 /* casting is fun. */
222 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
223 free_padlist (padlist);
224 }
225 }
226
227 SvREFCNT_dec (hv);
228}
229#endif
230 265
231#define SB do { 266#define SB do {
232#define SE } while (0) 267#define SE } while (0)
233 268
234#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE 269#define LOAD(state) load_state(aTHX_ (state));
235#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE 270#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
236 271
237#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 272#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
238 273
239static void 274static void
240load_state(pTHX_ Coro__State c) 275load_state(pTHX_ Coro__State c)
241{ 276{
242 PL_dowarn = c->dowarn; 277 PL_dowarn = c->dowarn;
278 PL_in_eval = c->in_eval;
243 279
244 PL_curstackinfo = c->curstackinfo; 280 PL_curstackinfo = c->curstackinfo;
245 PL_curstack = c->curstack; 281 PL_curstack = c->curstack;
246 PL_mainstack = c->mainstack; 282 PL_mainstack = c->mainstack;
247 PL_stack_sp = c->stack_sp; 283 PL_stack_sp = c->stack_sp;
248 PL_op = c->op; 284 PL_op = c->op;
249 PL_curpad = c->curpad; 285 PL_curpad = c->curpad;
286 PL_comppad = c->comppad;
287 PL_compcv = c->compcv;
250 PL_stack_base = c->stack_base; 288 PL_stack_base = c->stack_base;
251 PL_stack_max = c->stack_max; 289 PL_stack_max = c->stack_max;
252 PL_tmps_stack = c->tmps_stack; 290 PL_tmps_stack = c->tmps_stack;
253 PL_tmps_floor = c->tmps_floor; 291 PL_tmps_floor = c->tmps_floor;
254 PL_tmps_ix = c->tmps_ix; 292 PL_tmps_ix = c->tmps_ix;
… …
260 PL_scopestack_ix = c->scopestack_ix; 298 PL_scopestack_ix = c->scopestack_ix;
261 PL_scopestack_max = c->scopestack_max; 299 PL_scopestack_max = c->scopestack_max;
262 PL_savestack = c->savestack; 300 PL_savestack = c->savestack;
263 PL_savestack_ix = c->savestack_ix; 301 PL_savestack_ix = c->savestack_ix;
264 PL_savestack_max = c->savestack_max; 302 PL_savestack_max = c->savestack_max;
303#if PERL_VERSION < 9
265 PL_retstack = c->retstack; 304 PL_retstack = c->retstack;
266 PL_retstack_ix = c->retstack_ix; 305 PL_retstack_ix = c->retstack_ix;
267 PL_retstack_max = c->retstack_max; 306 PL_retstack_max = c->retstack_max;
307#endif
308 PL_curpm = c->curpm;
268 PL_curcop = c->curcop; 309 PL_curcop = c->curcop;
269 310
270 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 311 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
271 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 312 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
272 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 313 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
… …
280 { 321 {
281 AV *padlist = (AV *)POPs; 322 AV *padlist = (AV *)POPs;
282 323
283 if (padlist) 324 if (padlist)
284 { 325 {
285 put_padlist (cv); /* mark this padlist as available */ 326 put_padlist (aTHX_ cv); /* mark this padlist as available */
286 CvPADLIST(cv) = padlist; 327 CvPADLIST(cv) = padlist;
287#ifdef USE_THREADS
288 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
289#endif
290 } 328 }
291 329
292 ++CvDEPTH(cv); 330 ++CvDEPTH(cv);
293 } 331 }
294 332
… …
300save_state(pTHX_ Coro__State c, int flags) 338save_state(pTHX_ Coro__State c, int flags)
301{ 339{
302 { 340 {
303 dSP; 341 dSP;
304 I32 cxix = cxstack_ix; 342 I32 cxix = cxstack_ix;
343 PERL_CONTEXT *ccstk = cxstack;
305 PERL_SI *top_si = PL_curstackinfo; 344 PERL_SI *top_si = PL_curstackinfo;
306 PERL_CONTEXT *ccstk = cxstack;
307 345
308 /* 346 /*
309 * the worst thing you can imagine happens first - we have to save 347 * the worst thing you can imagine happens first - we have to save
310 * (and reinitialize) all cv's in the whole callchain :( 348 * (and reinitialize) all cv's in the whole callchain :(
311 */ 349 */
312 350
313 PUSHs (Nullsv); 351 PUSHs (Nullsv);
314 /* this loop was inspired by pp_caller */ 352 /* this loop was inspired by pp_caller */
315 for (;;) 353 for (;;)
316 { 354 {
317 do 355 while (cxix >= 0)
318 { 356 {
319 PERL_CONTEXT *cx = &ccstk[cxix--]; 357 PERL_CONTEXT *cx = &ccstk[cxix--];
320 358
321 if (CxTYPE(cx) == CXt_SUB) 359 if (CxTYPE(cx) == CXt_SUB)
322 { 360 {
323 CV *cv = cx->blk_sub.cv; 361 CV *cv = cx->blk_sub.cv;
324 if (CvDEPTH(cv)) 362 if (CvDEPTH(cv))
325 { 363 {
326#ifdef USE_THREADS
327 /*XPUSHs ((SV *)CvOWNER(cv));*/
328 /*CvOWNER(cv) = 0;*/
329 /*error must unlock this cv etc.. etc...*/
330#endif
331 EXTEND (SP, CvDEPTH(cv)*2); 364 EXTEND (SP, CvDEPTH(cv)*2);
332 365
333 while (--CvDEPTH(cv)) 366 while (--CvDEPTH(cv))
334 { 367 {
335 /* this tells the restore code to increment CvDEPTH */ 368 /* this tells the restore code to increment CvDEPTH */
… …
338 } 371 }
339 372
340 PUSHs ((SV *)CvPADLIST(cv)); 373 PUSHs ((SV *)CvPADLIST(cv));
341 PUSHs ((SV *)cv); 374 PUSHs ((SV *)cv);
342 375
343 get_padlist (cv); /* this is a monster */ 376 get_padlist (aTHX_ cv);
344 } 377 }
345 } 378 }
379#ifdef CXt_FORMAT
346 else if (CxTYPE(cx) == CXt_FORMAT) 380 else if (CxTYPE(cx) == CXt_FORMAT)
347 { 381 {
348 /* I never used formats, so how should I know how these are implemented? */ 382 /* I never used formats, so how should I know how these are implemented? */
349 /* my bold guess is as a simple, plain sub... */ 383 /* my bold guess is as a simple, plain sub... */
350 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 384 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
351 } 385 }
386#endif
352 } 387 }
353 while (cxix >= 0);
354 388
355 if (top_si->si_type == PERLSI_MAIN) 389 if (top_si->si_type == PERLSI_MAIN)
356 break; 390 break;
357 391
358 top_si = top_si->si_prev; 392 top_si = top_si->si_prev;
… …
361 } 395 }
362 396
363 PUTBACK; 397 PUTBACK;
364 } 398 }
365 399
366 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 400 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
367 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 401 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 402 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
369 403
370 c->dowarn = PL_dowarn; 404 c->dowarn = PL_dowarn;
405 c->in_eval = PL_in_eval;
371 406
372 c->curstackinfo = PL_curstackinfo; 407 c->curstackinfo = PL_curstackinfo;
373 c->curstack = PL_curstack; 408 c->curstack = PL_curstack;
374 c->mainstack = PL_mainstack; 409 c->mainstack = PL_mainstack;
375 c->stack_sp = PL_stack_sp; 410 c->stack_sp = PL_stack_sp;
376 c->op = PL_op; 411 c->op = PL_op;
377 c->curpad = PL_curpad; 412 c->curpad = PL_curpad;
413 c->comppad = PL_comppad;
414 c->compcv = PL_compcv;
378 c->stack_base = PL_stack_base; 415 c->stack_base = PL_stack_base;
379 c->stack_max = PL_stack_max; 416 c->stack_max = PL_stack_max;
380 c->tmps_stack = PL_tmps_stack; 417 c->tmps_stack = PL_tmps_stack;
381 c->tmps_floor = PL_tmps_floor; 418 c->tmps_floor = PL_tmps_floor;
382 c->tmps_ix = PL_tmps_ix; 419 c->tmps_ix = PL_tmps_ix;
… …
388 c->scopestack_ix = PL_scopestack_ix; 425 c->scopestack_ix = PL_scopestack_ix;
389 c->scopestack_max = PL_scopestack_max; 426 c->scopestack_max = PL_scopestack_max;
390 c->savestack = PL_savestack; 427 c->savestack = PL_savestack;
391 c->savestack_ix = PL_savestack_ix; 428 c->savestack_ix = PL_savestack_ix;
392 c->savestack_max = PL_savestack_max; 429 c->savestack_max = PL_savestack_max;
430#if PERL_VERSION < 9
393 c->retstack = PL_retstack; 431 c->retstack = PL_retstack;
394 c->retstack_ix = PL_retstack_ix; 432 c->retstack_ix = PL_retstack_ix;
395 c->retstack_max = PL_retstack_max; 433 c->retstack_max = PL_retstack_max;
434#endif
435 c->curpm = PL_curpm;
396 c->curcop = PL_curcop; 436 c->curcop = PL_curcop;
437}
438
439/*
440 * allocate various perl stacks. This is an exact copy
441 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace.
444 */
445static void
446coro_init_stacks (pTHX)
447{
448 LOCK;
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454
455 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458
459 New(50,PL_tmps_stack,96,SV*);
460 PL_tmps_floor = -1;
461 PL_tmps_ix = -1;
462 PL_tmps_max = 96;
463
464 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16;
467
468#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET;
470#endif
471
472 New(54,PL_scopestack,16,I32);
473 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16;
475
476 New(54,PL_savestack,96,ANY);
477 PL_savestack_ix = 0;
478 PL_savestack_max = 96;
479
480#if PERL_VERSION < 9
481 New(54,PL_retstack,8,OP*);
482 PL_retstack_ix = 0;
483 PL_retstack_max = 8;
484#endif
485
486 UNLOCK;
397} 487}
398 488
399/* 489/*
400 * destroy the stacks, the callchain etc... 490 * destroy the stacks, the callchain etc...
401 * still there is a memleak of 128 bytes...
402 */ 491 */
403STATIC void 492static void
404destroy_stacks(pTHX) 493destroy_stacks(pTHX)
405{ 494{
495 if (!IN_DESTRUCT)
496 {
406 /* is this ugly, I ask? */ 497 /* is this ugly, I ask? */
407 while (PL_scopestack_ix) 498 LEAVE_SCOPE (0);
408 LEAVE;
409 499
410 /* sure it is, but more important: is it correct?? :/ */ 500 /* sure it is, but more important: is it correct?? :/ */
411 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
412 FREETMPS; 501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
413 505
414 while (PL_curstackinfo->si_next) 506 while (PL_curstackinfo->si_next)
415 PL_curstackinfo = PL_curstackinfo->si_next; 507 PL_curstackinfo = PL_curstackinfo->si_next;
416 508
417 while (PL_curstackinfo) 509 while (PL_curstackinfo)
418 { 510 {
419 PERL_SI *p = PL_curstackinfo->si_prev; 511 PERL_SI *p = PL_curstackinfo->si_prev;
420 512
421 { 513 { /*D*//*remove*/
422 dSP; 514 dSP;
423 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
424 PUTBACK; /* possibly superfluous */ 516 PUTBACK; /* possibly superfluous */
425 } 517 }
426 518
427 dounwind(-1); 519 if (!IN_DESTRUCT)
428 520 {
521 dounwind (-1);/*D*//*remove*/
429 SvREFCNT_dec(PL_curstackinfo->si_stack); 522 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524
430 Safefree(PL_curstackinfo->si_cxstack); 525 Safefree (PL_curstackinfo->si_cxstack);
431 Safefree(PL_curstackinfo); 526 Safefree (PL_curstackinfo);
432 PL_curstackinfo = p; 527 PL_curstackinfo = p;
433 } 528 }
434 529
435 Safefree(PL_tmps_stack); 530 Safefree (PL_tmps_stack);
436 Safefree(PL_markstack); 531 Safefree (PL_markstack);
437 Safefree(PL_scopestack); 532 Safefree (PL_scopestack);
438 Safefree(PL_savestack); 533 Safefree (PL_savestack);
534#if PERL_VERSION < 9
439 Safefree(PL_retstack); 535 Safefree (PL_retstack);
536#endif
440} 537}
441 538
442#define SUB_INIT "Coro::State::_newcoro" 539static void
540setup_coro (struct coro *coro)
541{
542 /*
543 * emulate part of the perl startup here.
544 */
545 dTHX;
546 dSP;
547 UNOP myop;
548 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549
550 coro_init_stacks (aTHX);
551 /*PL_curcop = 0;*/
552 /*PL_in_eval = PL_in_eval;*/ /* inherit */
553 SvREFCNT_dec (GvAV (PL_defgv));
554 GvAV (PL_defgv) = coro->args; coro->args = 0;
555
556 SPAGAIN;
557
558 Zero (&myop, 1, UNOP);
559 myop.op_next = Nullop;
560 myop.op_flags = OPf_WANT_VOID;
561
562 PL_op = (OP *)&myop;
563
564 PUSHMARK(SP);
565 XPUSHs (sub_init);
566 PUTBACK;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN;
569
570 ENTER; /* necessary e.g. for dounwind */
571}
572
573static void
574free_coro_mortal ()
575{
576 if (coro_mortal)
577 {
578 SvREFCNT_dec (coro_mortal);
579 coro_mortal = 0;
580 }
581}
582
583static void
584coro_run (void *arg)
585{
586 /*
587 * this is a _very_ stripped down perl interpreter ;)
588 */
589 dTHX;
590
591 UNLOCK;
592
593 PL_top_env = &PL_start_env;
594
595 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598 /* continue at cctx_init, without entersub */
599 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601 /* somebody will hit me for both perl_run and PL_restart_op */
602 perl_run (aTHX_ PERL_GET_CONTEXT);
603
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613
614#if HAVE_MMAP
615
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
617 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
618
619 if (stack->sptr == (void *)-1)
620 {
621 perror ("FATAL: unable to mmap stack for coroutine");
622 _exit (EXIT_FAILURE);
623 }
624
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
626
627#else
628
629 stack->ssize = STACKSIZE * (long)sizeof (long);
630 New (0, stack->sptr, STACKSIZE, long);
631
632 if (!stack->sptr)
633 {
634 perror (stderr, "FATAL: unable to malloc stack for coroutine");
635 _exit (EXIT_FAILURE);
636 }
637
638#endif
639
640 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
641
642 return stack;
643}
644
645static void
646stack_free (coro_stack *stack)
647{
648 if (!stack || stack == main_stack)
649 return;
650
651#if HAVE_MMAP
652 munmap (stack->sptr, stack->ssize);
653#else
654 Safefree (stack->sptr);
655#endif
656
657 Safefree (stack);
658}
659
660static coro_stack *stack_first;
661
662static coro_stack *
663stack_get ()
664{
665 coro_stack *stack;
666
667 if (stack_first)
668 {
669 stack = stack_first;
670 stack_first = stack->next;
671 }
672 else
673 {
674 stack = stack_new ();
675 PL_op = PL_op->op_next;
676 }
677
678 return stack;
679}
680
681static void
682stack_put (coro_stack *stack)
683{
684 stack->next = stack_first;
685 stack_first = stack;
686}
687
688/* never call directly, always through the coro_state_transfer global variable */
689static void
690transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
691{
692 dSTACKLEVEL;
693
694 /* sometimes transfer is only called to set idle_sp */
695 if (flags == TRANSFER_SET_STACKLEVEL)
696 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
697 else if (prev != next)
698 {
699 coro_stack *prev__stack;
700
701 LOCK;
702
703 if (next->mainstack)
704 {
705 /* coroutine already started */
706 SAVE (prev, flags);
707 LOAD (next);
708 }
709 else
710 {
711 /* need to start coroutine */
712 /* first get rid of the old state */
713 SAVE (prev, -1);
714 /* setup coroutine call */
715 setup_coro (next);
716 /* need a stack */
717 next->stack = 0;
718 }
719
720 prev__stack = prev->stack;
721
722 /* possibly "free" the stack */
723 if (prev__stack->idle_sp == STACKLEVEL)
724 {
725 stack_put (prev__stack);
726 prev->stack = 0;
727 }
728
729 if (!next->stack)
730 next->stack = stack_get ();
731
732 if (prev__stack != next->stack)
733 {
734 prev__stack->top_env = PL_top_env;
735 PL_top_env = next->stack->top_env;
736 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
737 }
738
739 free_coro_mortal ();
740
741 UNLOCK;
742 }
743}
744
745/* use this function pointer to call the above function */
746/* this is done to increase chances of the compiler not inlining the call */
747/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750struct transfer_args
751{
752 struct coro *prev, *next;
753 int flags;
754};
755
756#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
757
758static void
759coro_state_destroy (struct coro *coro)
760{
761 if (coro->refcnt--)
762 return;
763
764 if (coro->mainstack && coro->mainstack != main_mainstack)
765 {
766 struct coro temp;
767
768 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
769 LOAD (aTHX_ coro);
770
771 destroy_stacks (aTHX);
772
773 LOAD ((&temp)); /* this will get rid of defsv etc.. */
774
775 coro->mainstack = 0;
776 }
777
778 stack_free (coro->stack);
779 SvREFCNT_dec (coro->args);
780 Safefree (coro);
781}
782
783static int
784coro_state_clear (SV *sv, MAGIC *mg)
785{
786 struct coro *coro = (struct coro *)mg->mg_ptr;
787 mg->mg_ptr = 0;
788
789 coro_state_destroy (coro);
790
791 return 0;
792}
793
794static int
795coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
796{
797 struct coro *coro = (struct coro *)mg->mg_ptr;
798
799 ++coro->refcnt;
800
801 return 0;
802}
803
804static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
805
806static struct coro *
807SvSTATE (SV *coro)
808{
809 HV *stash;
810 MAGIC *mg;
811
812 if (SvROK (coro))
813 coro = SvRV (coro);
814
815 stash = SvSTASH (coro);
816 if (stash != coro_stash && stash != coro_state_stash)
817 {
818 /* very slow, but rare, check */
819 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820 croak ("Coro::State object required");
821 }
822
823 mg = SvMAGIC (coro);
824 assert (mg->mg_type == PERL_MAGIC_ext);
825 return (struct coro *)mg->mg_ptr;
826}
827
828static void
829prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
830{
831 ta->prev = SvSTATE (prev);
832 ta->next = SvSTATE (next);
833 ta->flags = flags;
834}
835
836static void
837api_transfer (SV *prev, SV *next, int flags)
838{
839 dTHX;
840 struct transfer_args ta;
841
842 prepare_transfer (aTHX_ &ta, prev, next, flags);
843 TRANSFER (ta);
844}
845
846/** Coro ********************************************************************/
847
848#define PRIO_MAX 3
849#define PRIO_HIGH 1
850#define PRIO_NORMAL 0
851#define PRIO_LOW -1
852#define PRIO_IDLE -3
853#define PRIO_MIN -4
854
855/* for Coro.pm */
856static GV *coro_current, *coro_idle;
857static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858static int coro_nready;
859
860static void
861coro_enq (pTHX_ SV *sv)
862{
863 int prio;
864
865 if (SvTYPE (sv) != SVt_PVHV)
866 croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868 prio = SvSTATE (sv)->prio;
869
870 av_push (coro_ready [prio - PRIO_MIN], sv);
871 coro_nready++;
872}
873
874static SV *
875coro_deq (pTHX_ int min_prio)
876{
877 int prio = PRIO_MAX - PRIO_MIN;
878
879 min_prio -= PRIO_MIN;
880 if (min_prio < 0)
881 min_prio = 0;
882
883 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
884 if (AvFILLp (coro_ready [prio]) >= 0)
885 {
886 coro_nready--;
887 return av_shift (coro_ready [prio]);
888 }
889
890 return 0;
891}
892
893static void
894api_ready (SV *coro)
895{
896 dTHX;
897
898 if (SvROK (coro))
899 coro = SvRV (coro);
900
901 LOCK;
902 coro_enq (aTHX_ SvREFCNT_inc (coro));
903 UNLOCK;
904}
905
906static void
907prepare_schedule (aTHX_ struct transfer_args *ta)
908{
909 SV *current, *prev, *next;
910
911 LOCK;
912
913 current = GvSV (coro_current);
914
915 for (;;)
916 {
917 LOCK;
918
919 next = coro_deq (aTHX_ PRIO_MIN);
920
921 if (next)
922 break;
923
924 UNLOCK;
925
926 {
927 dSP;
928
929 ENTER;
930 SAVETMPS;
931
932 PUSHMARK (SP);
933 PUTBACK;
934 call_sv (GvSV (coro_idle), G_DISCARD);
935
936 FREETMPS;
937 LEAVE;
938 }
939 }
940
941 prev = SvRV (current);
942 SvRV (current) = next;
943
944 /* free this only after the transfer */
945 free_coro_mortal ();
946 coro_mortal = prev;
947
948 ta->prev = SvSTATE (prev);
949 ta->next = SvSTATE (next);
950 ta->flags = TRANSFER_SAVE_ALL;
951
952 UNLOCK;
953}
954
955static void
956prepare_cede (aTHX_ struct transfer_args *ta)
957{
958 LOCK;
959 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960 UNLOCK;
961
962 prepare_schedule (ta);
963}
964
965static void
966api_schedule (void)
967{
968 dTHX;
969 struct transfer_args ta;
970
971 prepare_schedule (&ta);
972 TRANSFER (ta);
973}
974
975static void
976api_cede (void)
977{
978 dTHX;
979 struct transfer_args ta;
980
981 prepare_cede (&ta);
982 TRANSFER (ta);
983}
443 984
444MODULE = Coro::State PACKAGE = Coro::State 985MODULE = Coro::State PACKAGE = Coro::State
445 986
446PROTOTYPES: ENABLE 987PROTOTYPES: DISABLE
447 988
448BOOT: 989BOOT:
990{
991#ifdef USE_ITHREADS
992 MUTEX_INIT (&coro_mutex);
993#endif
994 BOOT_PAGESIZE;
995
449 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 996 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450 997
451 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 998 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 999 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 1000 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
454 1001
455 if (!padlist_cache) 1002 main_mainstack = PL_mainstack;
456 padlist_cache = newHV ();
457 1003
458Coro::State 1004 coroapi.ver = CORO_API_VERSION;
459_newprocess(args) 1005 coroapi.transfer = api_transfer;
460 SV * args 1006
461 PROTOTYPE: $ 1007 Newz (0, main_stack, 1, coro_stack);
1008 main_stack->idle_sp = (void *)-1;
1009
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011}
1012
1013SV *
1014new (char *klass, ...)
462 CODE: 1015 CODE:
463 Coro__State coro; 1016{
1017 struct coro *coro;
1018 HV *hv;
1019 int i;
464 1020
465 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
466 croak ("Coro::State::_newprocess expects an arrayref");
467
468 New (0, coro, 1, struct coro); 1021 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV ();
469 1023
1024 hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027
1028 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i)));
1030
1031 coro->stack = main_stack;
470 coro->mainstack = 0; /* actual work is done inside transfer */ 1032 /*coro->mainstack = 0; *//*actual work is done inside transfer */
471 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1033 /*coro->stack = 0;*/
472 1034}
473 RETVAL = coro;
474 OUTPUT: 1035 OUTPUT:
475 RETVAL 1036 RETVAL
476 1037
477void 1038void
478transfer(prev, next, flags = SAVE_DEFAV) 1039transfer (...)
479 Coro::State_or_hashref prev 1040 ALIAS:
480 Coro::State_or_hashref next 1041 Coro::schedule = 1
481 int flags 1042 Coro::cede = 2
1043 _set_stacklevel = 3
482 CODE: 1044 CODE:
1045{
1046 struct transfer_args ta;
483 1047
484 if (prev != next) 1048 switch (ix)
485 { 1049 {
486 /*
487 * this could be done in newprocess which would lead to
488 * extremely elegant and fast (just SAVE/LOAD)
489 * code here, but lazy allocation of stacks has also
490 * some virtues and the overhead of the if() is nil.
491 */
492 if (next->mainstack)
493 {
494 SAVE (prev, flags);
495 LOAD (next);
496 /* mark this state as in-use */
497 next->mainstack = 0;
498 next->tmps_ix = -2;
499 }
500 else if (next->tmps_ix == -2)
501 {
502 croak ("tried to transfer to running coroutine");
503 }
504 else 1050 case 0:
1051 if (items != 3)
1052 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1053
1054 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
505 { 1055 break;
506 /*
507 * emulate part of the perl startup here.
508 */
509 UNOP myop;
510 1056
511 SAVE (prev, -1); /* first get rid of the old state */ 1057 case 1:
512 1058 prepare_schedule (&ta);
513 init_stacks (); /* from perl.c */
514 SPAGAIN;
515
516 PL_op = (OP *)&myop;
517 /*PL_curcop = 0;*/
518 SvREFCNT_dec (GvAV (PL_defgv));
519 GvAV (PL_defgv) = next->args;
520
521 Zero(&myop, 1, UNOP);
522 myop.op_next = Nullop;
523 myop.op_flags = OPf_WANT_VOID;
524
525 PUSHMARK(SP);
526 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
527 /*
528 * the next line is slightly wrong, as PL_op->op_next
529 * is actually being executed so we skip the first op.
530 * that doesn't matter, though, since it is only
531 * pp_nextstate and we never return...
532 * ah yes, and I don't care anyways ;)
533 */
534 PUTBACK;
535 PL_op = pp_entersub(aTHX);
536 SPAGAIN;
537
538 ENTER; /* necessary e.g. for dounwind */
539 } 1059 break;
1060
1061 case 2:
1062 prepare_cede (&ta);
1063 break;
1064
1065 case 3:
1066 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1067 ta.next = 0;
1068 ta.flags = TRANSFER_SET_STACKLEVEL;
1069 break;
540 } 1070 }
541 1071
1072 TRANSFER (ta);
1073}
1074
542void 1075void
543DESTROY(coro) 1076_clone_state_from (SV *dst, SV *src)
544 Coro::State coro 1077 CODE:
1078{
1079 struct coro *coro_src = SvSTATE (src);
1080
1081 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083 ++coro_src->refcnt;
1084 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085}
1086
1087void
1088_nonlocal_goto (IV nextop)
1089 CODE:
1090 /* uuh, somebody will kill me again for this */
1091 PL_op->op_next = INT2PTR (OP *, nextop);
1092
1093void
1094_exit (code)
1095 int code
1096 PROTOTYPE: $
1097 CODE:
1098 _exit (code);
1099
1100MODULE = Coro::State PACKAGE = Coro::Cont
1101
1102void
1103yield (...)
1104 PROTOTYPE: @
545 CODE: 1105 CODE:
1106{
1107 SV *yieldstack;
1108 SV *sv;
1109 AV *defav = GvAV (PL_defgv);
1110 struct coro *prev, *next;
546 1111
547 if (coro->mainstack) 1112 yieldstack = *hv_fetch (
1113 (HV *)SvRV (GvSV (coro_current)),
1114 "yieldstack", sizeof ("yieldstack") - 1,
1115 0
1116 );
1117
1118 /* set up @_ -- ugly */
1119 av_clear (defav);
1120 av_fill (defav, items - 1);
1121 while (items--)
1122 av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124 sv = av_pop ((AV *)SvRV (yieldstack));
1125 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127 SvREFCNT_dec (sv);
1128
1129 coro_state_transfer (aTHX_ prev, next, 0);
1130}
1131
1132MODULE = Coro::State PACKAGE = Coro
1133
1134BOOT:
1135{
1136 int i;
1137
1138 coro_stash = gv_stashpv ("Coro", TRUE);
1139
1140 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146
1147 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151 coro_ready[i] = newAV ();
1152
1153 {
1154 SV *sv = perl_get_sv("Coro::API", 1);
1155
1156 coroapi.schedule = api_schedule;
1157 coroapi.cede = api_cede;
1158 coroapi.ready = api_ready;
1159 coroapi.nready = &coro_nready;
1160 coroapi.current = coro_current;
1161
1162 GCoroAPI = &coroapi;
1163 sv_setiv (sv, (IV)&coroapi);
1164 SvREADONLY_on (sv);
1165 }
1166}
1167
1168int
1169prio (Coro::State coro, int newprio = 0)
1170 ALIAS:
1171 nice = 1
1172 CODE:
1173{
1174 RETVAL = coro->prio;
1175
1176 if (items > 1)
548 { 1177 {
549 struct coro temp; 1178 if (ix)
1179 newprio += coro->prio;
550 1180
551 SAVE(aTHX_ (&temp), SAVE_ALL); 1181 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
552 LOAD(aTHX_ coro); 1182 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
553 1183
554 destroy_stacks (); 1184 coro->prio = newprio;
555
556 LOAD((&temp)); /* this will get rid of defsv etc.. */
557 } 1185 }
558 1186}
559 Safefree (coro);
560 1187
561void 1188void
562flush() 1189ready (SV *self)
1190 PROTOTYPE: $
563 CODE: 1191 CODE:
564#ifdef MAY_FLUSH 1192 api_ready (self);
565 flush_padlist_cache ();
566#endif
567 1193
1194int
1195nready (...)
1196 PROTOTYPE:
1197 CODE:
1198 RETVAL = coro_nready;
1199 OUTPUT:
1200 RETVAL
568 1201
1202MODULE = Coro::State PACKAGE = Coro::AIO
1203
1204SV *
1205_get_state ()
1206 CODE:
1207{
1208 struct {
1209 int errorno;
1210 int laststype;
1211 int laststatval;
1212 Stat_t statcache;
1213 } data;
1214
1215 data.errorno = errno;
1216 data.laststype = PL_laststype;
1217 data.laststatval = PL_laststatval;
1218 data.statcache = PL_statcache;
1219
1220 RETVAL = newSVpvn ((char *)&data, sizeof data);
1221}
1222 OUTPUT:
1223 RETVAL
1224
1225void
1226_set_state (char *data_)
1227 PROTOTYPE: $
1228 CODE:
1229{
1230 struct {
1231 int errorno;
1232 int laststype;
1233 int laststatval;
1234 Stat_t statcache;
1235 } *data = (void *)data_;
1236
1237 errno = data->errorno;
1238 PL_laststype = data->laststype;
1239 PL_laststatval = data->laststatval;
1240 PL_statcache = data->statcache;
1241}

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