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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC

1#include "libcoro/coro.c"
2
1#include "EXTERN.h" 3#include "EXTERN.h"
2#include "perl.h" 4#include "perl.h"
3#include "XSUB.h" 5#include "XSUB.h"
4 6
5#include "libcoro/coro.c" 7#include "patchlevel.h"
8
9#if PERL_VERSION < 6
10# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr
12# endif
13# ifndef call_sv
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0
27# endif
28#endif
29
30#include <stdio.h>
31#include <errno.h>
32
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34# undef STACKGUARD
35#endif
36
37#ifndef STACKGUARD
38# define STACKGUARD 0
39#endif
6 40
7#ifdef HAVE_MMAP 41#ifdef HAVE_MMAP
8# include <unistd.h> 42# include <unistd.h>
9# include <sys/mman.h> 43# include <sys/mman.h>
44# ifndef MAP_ANONYMOUS
45# ifdef MAP_ANON
46# define MAP_ANONYMOUS MAP_ANON
47# else
48# undef HAVE_MMAP
49# endif
10#endif 50# endif
51# include <limits.h>
52# ifndef PAGESIZE
53# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize;
56# else
57# define BOOT_PAGESIZE
58# endif
59#endif
11 60
12#define MAY_FLUSH /* increases codesize */ 61/* The next macro should declare a variable stacklevel that contains and approximation
62 * to the current C stack pointer. Its property is that it changes with each call
63 * and should be unique. */
64#define dSTACKLEVEL int stacklevel
65#define STACKLEVEL ((void *)&stacklevel)
13 66
14#define SUB_INIT "Coro::State::initialize" 67#define IN_DESTRUCT (PL_main_cv == Nullcv)
15 68
16#define TRANSFER_SAVE_DEFAV 0x00000001 69#include "CoroAPI.h"
17#define TRANSFER_SAVE_DEFSV 0x00000002
18#define TRANSFER_SAVE_ERRSV 0x00000004
19#define TRANSFER_SAVE_CCTXT 0x00000008
20 70
21#define TRANSFER_SAVE_ALL -1 71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
22 72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif
81
82static struct CoroAPI coroapi;
83static AV *main_mainstack; /* used to differentiate between $main and others */
84static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */
86
87/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack {
89 struct coro_stack *next;
90
91 /* the stack */
92 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */
94
95 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
97 JMPENV *top_env;
98 coro_context cctx;
99} coro_stack;
100
101/* this is a structure representing a perl-level coroutine */
23struct coro { 102struct coro {
24 /* the optional C context */ 103 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 104 coro_stack *stack;
26 void *sptr; 105
27 long ssize; 106 /* data associated with this coroutine (initial args) */
107 AV *args;
108 int refcnt;
28 109
29 /* optionally saved, might be zero */ 110 /* optionally saved, might be zero */
30 AV *defav; 111 AV *defav;
31 SV *defsv; 112 SV *defsv;
32 SV *errsv; 113 SV *errsv;
33 114
34 /* saved global state not related to stacks */ 115 /* saved global state not related to stacks */
35 U8 dowarn; 116 U8 dowarn;
117 I32 in_eval;
36 118
37 /* the stacks and related info (callchain etc..) */ 119 /* the stacks and related info (callchain etc..) */
38 PERL_SI *curstackinfo; 120 PERL_SI *curstackinfo;
39 AV *curstack; 121 AV *curstack;
40 AV *mainstack; 122 AV *mainstack;
41 SV **stack_sp; 123 SV **stack_sp;
42 OP *op; 124 OP *op;
43 SV **curpad; 125 SV **curpad;
126 AV *comppad;
127 CV *compcv;
44 SV **stack_base; 128 SV **stack_base;
45 SV **stack_max; 129 SV **stack_max;
46 SV **tmps_stack; 130 SV **tmps_stack;
47 I32 tmps_floor; 131 I32 tmps_floor;
48 I32 tmps_ix; 132 I32 tmps_ix;
… …
57 I32 savestack_ix; 141 I32 savestack_ix;
58 I32 savestack_max; 142 I32 savestack_max;
59 OP **retstack; 143 OP **retstack;
60 I32 retstack_ix; 144 I32 retstack_ix;
61 I32 retstack_max; 145 I32 retstack_max;
146 PMOP *curpm;
62 COP *curcop; 147 COP *curcop;
63 JMPENV start_env;
64 JMPENV *top_env;
65 148
66 /* data associated with this coroutine (initial args) */ 149 /* coro process data */
67 AV *args; 150 int prio;
68}; 151};
69 152
70typedef struct coro *Coro__State; 153typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 154typedef struct coro *Coro__State_or_hashref;
72 155
73static AV *main_mainstack; /* used to differentiate between $main and others */ 156static AV *
74static HV *coro_state_stash; 157coro_clone_padlist (CV *cv)
75static HV *padlist_cache;
76
77/* mostly copied from op.c:cv_clone2 */
78STATIC AV *
79clone_padlist (AV *protopadlist)
80{ 158{
81 AV *av; 159 AV *padlist = CvPADLIST (cv);
82 I32 ix;
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
85 SV **pname = AvARRAY (protopad_name);
86 SV **ppad = AvARRAY (protopad);
87 I32 fname = AvFILLp (protopad_name);
88 I32 fpad = AvFILLp (protopad);
89 AV *newpadlist, *newpad_name, *newpad; 160 AV *newpadlist, *newpad;
90 SV **npad;
91
92 newpad_name = newAV ();
93 for (ix = fname; ix >= 0; ix--)
94 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
95
96 newpad = newAV ();
97 av_fill (newpad, AvFILLp (protopad));
98 npad = AvARRAY (newpad);
99 161
100 newpadlist = newAV (); 162 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 163 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 164#if PERL_VERSION < 9
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist);
171
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 173 av_store (newpadlist, 1, (SV *)newpad);
104 174
105 av = newAV (); /* will be @_ */ 175 return newpadlist;
106 av_extend (av, 0); 176}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 177
110 for (ix = fpad; ix > 0; ix--) 178static void
179free_padlist (AV *padlist)
180{
181 /* may be during global destruction */
182 if (SvREFCNT (padlist))
111 { 183 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 184 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 185 while (i >= 0)
114 { 186 {
115 char *name = SvPVX (namesv); /* XXX */ 187 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 188 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 189 {
120 else
121 { /* our own lexical */
122 SV *sv; 190 SV *sv;
123 if (*name == '&') 191 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 192 SvREFCNT_dec (sv);
125 else if (*name == '@') 193
126 sv = (SV *) newAV (); 194 SvREFCNT_dec (*svp);
127 else if (*name == '%')
128 sv = (SV *) newHV ();
129 else
130 sv = NEWSV (0, 0);
131 if (!SvPADBUSY (sv))
132 SvPADMY_on (sv);
133 npad[ix] = sv;
134 } 195 }
135 } 196 }
136 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 197
137 { 198 SvREFCNT_dec ((SV*)padlist);
138 npad[ix] = SvREFCNT_inc (ppad[ix]);
139 }
140 else
141 {
142 SV *sv = NEWSV (0, 0);
143 SvPADTMP_on (sv);
144 npad[ix] = sv;
145 }
146 } 199 }
200}
147 201
148#if 0 /* return -ENOTUNDERSTOOD */ 202static int
149 /* Now that vars are all in place, clone nested closures. */ 203coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
204{
205 AV *padlist;
206 AV *av = (AV *)mg->mg_obj;
150 207
151 for (ix = fpad; ix > 0; ix--) { 208 /* casting is fun. */
152 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
153 if (namesv 210 free_padlist (padlist);
154 && namesv != &PL_sv_undef 211
155 && !(SvFLAGS(namesv) & SVf_FAKE) 212 SvREFCNT_dec (av);
156 && *SvPVX(namesv) == '&' 213
157 && CvCLONE(ppad[ix])) 214 return 0;
158 { 215}
159 CV *kid = cv_clone((CV*)ppad[ix]); 216
160 SvREFCNT_dec(ppad[ix]); 217#define PERL_MAGIC_coro PERL_MAGIC_ext
161 CvCLONE_on(kid); 218
162 SvPADMY_on(kid); 219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
163 npad[ix] = (SV*)kid; 220
164 } 221/* the next two functions merely cache the padlists */
222static void
223get_padlist (CV *cv)
224{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
226
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
229 else
230 {
231#if 0
232 /* this is probably cleaner, but also slower? */
233 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp);
237#else
238 CvPADLIST (cv) = coro_clone_padlist (cv);
239#endif
240 }
241}
242
243static void
244put_padlist (CV *cv)
245{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
247
248 if (!mg)
249 {
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
165 } 254 }
166#endif
167 255
168 return newpadlist;
169}
170
171#ifdef MAY_FLUSH
172STATIC AV *
173free_padlist (AV *padlist)
174{
175 /* may be during global destruction */
176 if (SvREFCNT(padlist))
177 {
178 I32 i = AvFILLp(padlist);
179 while (i >= 0)
180 {
181 SV **svp = av_fetch(padlist, i--, FALSE);
182 SV *sv = svp ? *svp : Nullsv;
183 if (sv)
184 SvREFCNT_dec(sv);
185 }
186
187 SvREFCNT_dec((SV*)padlist);
188 }
189}
190#endif
191
192/* the next two functions merely cache the padlists */
193STATIC void
194get_padlist (CV *cv)
195{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
197
198 if (he && AvFILLp ((AV *)*he) >= 0)
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
200 else
201 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
202}
203
204STATIC void
205put_padlist (CV *cv)
206{
207 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
208
209 if (SvTYPE (*he) != SVt_PVAV)
210 {
211 SvREFCNT_dec (*he);
212 *he = (SV *)newAV ();
213 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
216} 257}
217
218#ifdef MAY_FLUSH
219STATIC void
220flush_padlist_cache ()
221{
222 HV *hv = padlist_cache;
223 padlist_cache = newHV ();
224
225 if (hv_iterinit (hv))
226 {
227 HE *he;
228 AV *padlist;
229
230 while (!!(he = hv_iternext (hv)))
231 {
232 AV *av = (AV *)HeVAL(he);
233
234 /* casting is fun. */
235 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
236 free_padlist (padlist);
237 }
238 }
239
240 SvREFCNT_dec (hv);
241}
242#endif
243 258
244#define SB do { 259#define SB do {
245#define SE } while (0) 260#define SE } while (0)
246 261
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 262#define LOAD(state) load_state((state));
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 263#define SAVE(state,flags) save_state((state),(flags));
249 264
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
251 266
252static void 267static void
253load_state(pTHX_ Coro__State c) 268load_state(Coro__State c)
254{ 269{
255 PL_dowarn = c->dowarn; 270 PL_dowarn = c->dowarn;
271 PL_in_eval = c->in_eval;
256 272
257 PL_curstackinfo = c->curstackinfo; 273 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack; 274 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 275 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp; 276 PL_stack_sp = c->stack_sp;
261 PL_op = c->op; 277 PL_op = c->op;
262 PL_curpad = c->curpad; 278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
263 PL_stack_base = c->stack_base; 281 PL_stack_base = c->stack_base;
264 PL_stack_max = c->stack_max; 282 PL_stack_max = c->stack_max;
265 PL_tmps_stack = c->tmps_stack; 283 PL_tmps_stack = c->tmps_stack;
266 PL_tmps_floor = c->tmps_floor; 284 PL_tmps_floor = c->tmps_floor;
267 PL_tmps_ix = c->tmps_ix; 285 PL_tmps_ix = c->tmps_ix;
… …
273 PL_scopestack_ix = c->scopestack_ix; 291 PL_scopestack_ix = c->scopestack_ix;
274 PL_scopestack_max = c->scopestack_max; 292 PL_scopestack_max = c->scopestack_max;
275 PL_savestack = c->savestack; 293 PL_savestack = c->savestack;
276 PL_savestack_ix = c->savestack_ix; 294 PL_savestack_ix = c->savestack_ix;
277 PL_savestack_max = c->savestack_max; 295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
278 PL_retstack = c->retstack; 297 PL_retstack = c->retstack;
279 PL_retstack_ix = c->retstack_ix; 298 PL_retstack_ix = c->retstack_ix;
280 PL_retstack_max = c->retstack_max; 299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
281 PL_curcop = c->curcop; 302 PL_curcop = c->curcop;
282 PL_start_env = c->start_env;
283 PL_top_env = c->top_env;
284 303
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
288 307
… …
297 316
298 if (padlist) 317 if (padlist)
299 { 318 {
300 put_padlist (cv); /* mark this padlist as available */ 319 put_padlist (cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 320 CvPADLIST(cv) = padlist;
302#ifdef USE_THREADS
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 } 321 }
306 322
307 ++CvDEPTH(cv); 323 ++CvDEPTH(cv);
308 } 324 }
309 325
310 PUTBACK; 326 PUTBACK;
311 } 327 }
312} 328}
313 329
314static void 330static void
315save_state(pTHX_ Coro__State c, int flags) 331save_state(Coro__State c, int flags)
316{ 332{
317 { 333 {
318 dSP; 334 dSP;
319 I32 cxix = cxstack_ix; 335 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 336 PERL_CONTEXT *ccstk = cxstack;
… …
327 343
328 PUSHs (Nullsv); 344 PUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 345 /* this loop was inspired by pp_caller */
330 for (;;) 346 for (;;)
331 { 347 {
332 do 348 while (cxix >= 0)
333 { 349 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 350 PERL_CONTEXT *cx = &ccstk[cxix--];
335 351
336 if (CxTYPE(cx) == CXt_SUB) 352 if (CxTYPE(cx) == CXt_SUB)
337 { 353 {
338 CV *cv = cx->blk_sub.cv; 354 CV *cv = cx->blk_sub.cv;
339 if (CvDEPTH(cv)) 355 if (CvDEPTH(cv))
340 { 356 {
341#ifdef USE_THREADS
342 /*XPUSHs ((SV *)CvOWNER(cv));*/
343 /*CvOWNER(cv) = 0;*/
344 /*error must unlock this cv etc.. etc...*/
345#endif
346 EXTEND (SP, CvDEPTH(cv)*2); 357 EXTEND (SP, CvDEPTH(cv)*2);
347 358
348 while (--CvDEPTH(cv)) 359 while (--CvDEPTH(cv))
349 { 360 {
350 /* this tells the restore code to increment CvDEPTH */ 361 /* this tells the restore code to increment CvDEPTH */
… …
353 } 364 }
354 365
355 PUSHs ((SV *)CvPADLIST(cv)); 366 PUSHs ((SV *)CvPADLIST(cv));
356 PUSHs ((SV *)cv); 367 PUSHs ((SV *)cv);
357 368
358 get_padlist (cv); /* this is a monster */ 369 get_padlist (cv);
359 } 370 }
360 } 371 }
372#ifdef CXt_FORMAT
361 else if (CxTYPE(cx) == CXt_FORMAT) 373 else if (CxTYPE(cx) == CXt_FORMAT)
362 { 374 {
363 /* I never used formats, so how should I know how these are implemented? */ 375 /* I never used formats, so how should I know how these are implemented? */
364 /* my bold guess is as a simple, plain sub... */ 376 /* my bold guess is as a simple, plain sub... */
365 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366 } 378 }
379#endif
367 } 380 }
368 while (cxix >= 0);
369 381
370 if (top_si->si_type == PERLSI_MAIN) 382 if (top_si->si_type == PERLSI_MAIN)
371 break; 383 break;
372 384
373 top_si = top_si->si_prev; 385 top_si = top_si->si_prev;
… …
380 392
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
384 396
385 /* I have not the slightest idea of why av_reify is necessary */
386 /* but if it's missing the defav contents magically get replaced sometimes */
387 if (c->defav)
388 av_reify (c->defav);
389
390 c->dowarn = PL_dowarn; 397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
391 399
392 c->curstackinfo = PL_curstackinfo; 400 c->curstackinfo = PL_curstackinfo;
393 c->curstack = PL_curstack; 401 c->curstack = PL_curstack;
394 c->mainstack = PL_mainstack; 402 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp; 403 c->stack_sp = PL_stack_sp;
396 c->op = PL_op; 404 c->op = PL_op;
397 c->curpad = PL_curpad; 405 c->curpad = PL_curpad;
406 c->comppad = PL_comppad;
407 c->compcv = PL_compcv;
398 c->stack_base = PL_stack_base; 408 c->stack_base = PL_stack_base;
399 c->stack_max = PL_stack_max; 409 c->stack_max = PL_stack_max;
400 c->tmps_stack = PL_tmps_stack; 410 c->tmps_stack = PL_tmps_stack;
401 c->tmps_floor = PL_tmps_floor; 411 c->tmps_floor = PL_tmps_floor;
402 c->tmps_ix = PL_tmps_ix; 412 c->tmps_ix = PL_tmps_ix;
… …
408 c->scopestack_ix = PL_scopestack_ix; 418 c->scopestack_ix = PL_scopestack_ix;
409 c->scopestack_max = PL_scopestack_max; 419 c->scopestack_max = PL_scopestack_max;
410 c->savestack = PL_savestack; 420 c->savestack = PL_savestack;
411 c->savestack_ix = PL_savestack_ix; 421 c->savestack_ix = PL_savestack_ix;
412 c->savestack_max = PL_savestack_max; 422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
413 c->retstack = PL_retstack; 424 c->retstack = PL_retstack;
414 c->retstack_ix = PL_retstack_ix; 425 c->retstack_ix = PL_retstack_ix;
415 c->retstack_max = PL_retstack_max; 426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
416 c->curcop = PL_curcop; 429 c->curcop = PL_curcop;
417 c->start_env = PL_start_env;
418 c->top_env = PL_top_env;
419} 430}
420 431
421/* 432/*
422 * allocate various perl stacks. This is an exact copy 433 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 434 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 435 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 436 * not usually need a lot of stackspace.
426 */ 437 */
427STATIC void 438static void
428coro_init_stacks (pTHX) 439coro_init_stacks ()
429{ 440{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 441 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 442 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 443 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 445
435 PL_stack_base = AvARRAY(PL_curstack); 446 PL_stack_base = AvARRAY(PL_curstack);
436 PL_stack_sp = PL_stack_base; 447 PL_stack_sp = PL_stack_base;
437 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438 449
439 New(50,PL_tmps_stack,64,SV*); 450 New(50,PL_tmps_stack,96,SV*);
440 PL_tmps_floor = -1; 451 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 452 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 453 PL_tmps_max = 96;
443 454
444 New(54,PL_markstack,12,I32); 455 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 456 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 457 PL_markstack_max = PL_markstack + 16;
447 458
459#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 460 SET_MARK_OFFSET;
461#endif
449 462
450 New(54,PL_scopestack,12,I32); 463 New(54,PL_scopestack,16,I32);
451 PL_scopestack_ix = 0; 464 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 465 PL_scopestack_max = 16;
453 466
454 New(54,PL_savestack,64,ANY); 467 New(54,PL_savestack,96,ANY);
455 PL_savestack_ix = 0; 468 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 469 PL_savestack_max = 96;
457 470
471#if PERL_VERSION < 9
458 New(54,PL_retstack,8,OP*); 472 New(54,PL_retstack,8,OP*);
459 PL_retstack_ix = 0; 473 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 474 PL_retstack_max = 8;
475#endif
461} 476}
462 477
463/* 478/*
464 * destroy the stacks, the callchain etc... 479 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 480 */
467STATIC void 481static void
468destroy_stacks(pTHX) 482destroy_stacks()
469{ 483{
484 if (!IN_DESTRUCT)
485 {
470 /* is this ugly, I ask? */ 486 /* is this ugly, I ask? */
471 while (PL_scopestack_ix) 487 LEAVE_SCOPE (0);
472 LEAVE;
473 488
474 /* sure it is, but more important: is it correct?? :/ */ 489 /* sure it is, but more important: is it correct?? :/ */
475 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476 FREETMPS; 490 FREETMPS;
491
492 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493 }
477 494
478 while (PL_curstackinfo->si_next) 495 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 496 PL_curstackinfo = PL_curstackinfo->si_next;
480 497
481 while (PL_curstackinfo) 498 while (PL_curstackinfo)
482 { 499 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 500 PERL_SI *p = PL_curstackinfo->si_prev;
484 501
485 { 502 { /*D*//*remove*/
486 dSP; 503 dSP;
487 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 504 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488 PUTBACK; /* possibly superfluous */ 505 PUTBACK; /* possibly superfluous */
489 } 506 }
490 507
491 dounwind(-1); 508 if (!IN_DESTRUCT)
492 509 {
510 dounwind (-1);/*D*//*remove*/
493 SvREFCNT_dec(PL_curstackinfo->si_stack); 511 SvREFCNT_dec (PL_curstackinfo->si_stack);
512 }
513
494 Safefree(PL_curstackinfo->si_cxstack); 514 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 515 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 516 PL_curstackinfo = p;
497 } 517 }
498 518
499 Safefree(PL_tmps_stack); 519 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 520 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 521 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 522 Safefree (PL_savestack);
523#if PERL_VERSION < 9
503 Safefree(PL_retstack); 524 Safefree (PL_retstack);
504}
505
506static void
507allocate_stack (Coro__State ctx)
508{
509#ifdef HAVE_MMAP
510 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
511 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
512 if (ctx->sptr == (void *)-1)
513#endif 525#endif
514 {
515 /*FIXME*//*D*//* reasonable stack size! */
516 ctx->ssize = 4096 * sizeof (long);
517 New (0, ctx->sptr, 4096, long);
518 }
519} 526}
520 527
521static void 528static void
522deallocate_stack (Coro__State ctx) 529setup_coro (struct coro *coro)
523{
524#ifdef HAVE_MMAP
525 munmap (ctx->sptr, ctx->ssize);
526#else
527 Safefree (ctx->sptr);
528#endif
529}
530
531/* might go away together with optional SAVE_CCTXT */
532static void
533setup_coro (void *arg)
534{ 530{
535 /* 531 /*
536 * emulate part of the perl startup here. 532 * emulate part of the perl startup here.
537 */ 533 */
534 dTHX;
538 dSP; 535 dSP;
539 Coro__State ctx = (Coro__State)arg; 536 UNOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); 537 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
541 538
542 coro_init_stacks (aTHX); 539 coro_init_stacks ();
543 JMPENV_BOOTSTRAP; 540 /*PL_curcop = 0;*/
541 /*PL_in_eval = PL_in_eval;*/ /* inherit */
542 SvREFCNT_dec (GvAV (PL_defgv));
543 GvAV (PL_defgv) = coro->args; coro->args = 0;
544
544 SPAGAIN; 545 SPAGAIN;
545 546
546 /*PL_curcop = 0;*/ 547 Zero (&myop, 1, UNOP);
547 SvREFCNT_dec (GvAV (PL_defgv)); 548 myop.op_next = Nullop;
548 GvAV (PL_defgv) = ctx->args; 549 myop.op_flags = OPf_WANT_VOID;
549 550
550 if (ctx->sptr) 551 PL_op = (OP *)&myop;
552
553 PUSHMARK(SP);
554 XPUSHs (sub_init);
555 PUTBACK;
556 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557 SPAGAIN;
558
559 ENTER; /* necessary e.g. for dounwind */
560}
561
562static void
563free_coro_mortal ()
564{
565 if (coro_mortal)
551 { 566 {
567 SvREFCNT_dec (coro_mortal);
568 coro_mortal = 0;
569 }
570}
571
572static void
573prepare_cctx (coro_stack *cctx)
574{
575 dSP;
576 UNOP myop;
577
578 Zero (&myop, 1, UNOP);
579 myop.op_next = PL_op;
580 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581
552 PUSHMARK(SP); 582 PUSHMARK(SP);
583 EXTEND (SP, 2);
584 PUSHs (newSViv (PTR2IV (cctx)));
585 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
553 PUTBACK; 586 PUTBACK;
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 587 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
555 croak ("FATAL: CCTXT coroutine returned!"); 588 SPAGAIN;
589}
590
591static void
592coro_run (void *arg)
593{
594 /*
595 * this is a _very_ stripped down perl interpreter ;)
596 */
597 UNLOCK;
598
599 PL_top_env = &PL_start_env;
600 prepare_cctx ((coro_stack *)arg);
601
602 /* somebody will hit me for both perl_run and PL_restartop */
603 perl_run (PERL_GET_CONTEXT);
604
605 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606 abort ();
607}
608
609static coro_stack *
610stack_new ()
611{
612 coro_stack *stack;
613
614 New (0, stack, 1, coro_stack);
615
616#if HAVE_MMAP
617
618 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619 /* mmap suppsedly does allocate-on-write for us */
620 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621
622 if (stack->sptr == (void *)-1)
623 {
624 perror ("FATAL: unable to mmap stack for coroutine");
625 _exit (EXIT_FAILURE);
626 }
627
628# if STACKGUARD
629 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630# endif
631
632#else
633
634 stack->ssize = STACKSIZE * (long)sizeof (long);
635 New (0, stack->sptr, STACKSIZE, long);
636
637 if (!stack->sptr)
638 {
639 perror (stderr, "FATAL: unable to malloc stack for coroutine");
640 _exit (EXIT_FAILURE);
641 }
642
643#endif
644
645 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
646
647 return stack;
648}
649
650static void
651stack_free (coro_stack *stack)
652{
653 if (!stack)
654 return;
655
656#if HAVE_MMAP
657 munmap (stack->sptr, stack->ssize);
658#else
659 Safefree (stack->sptr);
660#endif
661
662 Safefree (stack);
663}
664
665static coro_stack *stack_first;
666
667static coro_stack *
668stack_get ()
669{
670 coro_stack *stack;
671
672 if (stack_first)
673 {
674 stack = stack_first;
675 stack_first = stack->next;
556 } 676 }
557 else 677 else
678 {
679 stack = stack_new ();
680 PL_op = PL_op->op_next;
681 }
682
683 return stack;
684}
685
686static void
687stack_put (coro_stack *stack)
688{
689 stack->next = stack_first;
690 stack_first = stack;
691}
692
693/* never call directly, always through the coro_state_transfer global variable */
694static void
695transfer_impl (struct coro *prev, struct coro *next, int flags)
696{
697 dSTACKLEVEL;
698
699 /* sometimes transfer is only called to set idle_sp */
700 if (flags == TRANSFER_SET_STACKLEVEL)
701 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
702 else if (prev != next)
558 { 703 {
559 UNOP myop; 704 coro_stack *prev__stack;
560 705
561 PL_op = (OP *)&myop; 706 LOCK;
562 707
563 Zero(&myop, 1, UNOP);
564 myop.op_next = Nullop;
565 myop.op_flags = OPf_WANT_VOID;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 /*
570 * the next line is slightly wrong, as PL_op->op_next
571 * is actually being executed so we skip the first op.
572 * that doesn't matter, though, since it is only
573 * pp_nextstate and we never return...
574 * ah yes, and I don't care anyways ;)
575 */
576 PUTBACK;
577 PL_op = pp_entersub();
578 SPAGAIN;
579
580 ENTER; /* necessary e.g. for dounwind */
581 }
582}
583
584STATIC void
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
586{
587 dSP;
588
589 if (prev != next)
590 {
591 /*
592 * this could be done in newprocess which would lead to
593 * extremely elegant and fast (basically just SAVE/LOAD)
594 * code here, but lazy allocation of stacks has also
595 * some virtues and the overhead of the if() is nil.
596 */
597 if (next->mainstack) 708 if (next->mainstack)
598 { 709 {
710 /* coroutine already started */
599 SAVE (prev, flags); 711 SAVE (prev, flags);
600 LOAD (next); 712 LOAD (next);
601
602 /* mark this state as in-use */
603 next->mainstack = 0;
604 next->tmps_ix = -2;
605
606 if (flags & TRANSFER_SAVE_CCTXT)
607 {
608 if (!next->ssize)
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611 if (!prev->ssize)
612 prev->ssize = 1; /* mark cctx as valid ;) */
613
614 coro_transfer (&(prev->cctx), &(next->cctx));
615 }
616
617 } 713 }
618 else if (next->tmps_ix == -2)
619 croak ("tried to transfer to running coroutine");
620 else 714 else
621 { 715 {
716 /* need to start coroutine */
622 SAVE (prev, -1); /* first get rid of the old state */ 717 /* first get rid of the old state */
623 718 SAVE (prev, -1);
624 if (flags & TRANSFER_SAVE_CCTXT) 719 /* setup coroutine call */
625 {
626 if (!next->ssize)
627 {
628 allocate_stack (next);
629 coro_create (&(next->cctx),
630 setup_coro, (void *)next,
631 next->sptr, next->ssize);
632 }
633
634 if (!prev->ssize)
635 prev->ssize = 1; /* mark cctx as valid ;) */
636
637 coro_transfer (&(prev->cctx), &(next->cctx));
638 }
639 else
640 setup_coro (next); 720 setup_coro (next);
721 /* need a stack */
722 next->stack = 0;
641 } 723 }
724
725 if (!prev->stack)
726 /* create a new empty context */
727 Newz (0, prev->stack, 1, coro_stack);
728
729 prev__stack = prev->stack;
730
731 /* possibly "free" the stack */
732 if (prev__stack->idle_sp == STACKLEVEL)
733 {
734 stack_put (prev__stack);
735 prev->stack = 0;
736 }
737
738 if (!next->stack)
739 next->stack = stack_get ();
740
741 if (prev__stack != next->stack)
742 {
743 prev__stack->top_env = PL_top_env;
744 PL_top_env = next->stack->top_env;
745 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
746 }
747
748 free_coro_mortal ();
749
750 UNLOCK;
642 } 751 }
643} 752}
644 753
754/* use this function pointer to call the above function */
755/* this is done to increase chances of the compiler not inlining the call */
756/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759struct transfer_args
760{
761 struct coro *prev, *next;
762 int flags;
763};
764
765#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767static void
768coro_state_destroy (struct coro *coro)
769{
770 if (coro->refcnt--)
771 return;
772
773 if (coro->mainstack && coro->mainstack != main_mainstack)
774 {
775 struct coro temp;
776
777 SAVE ((&temp), TRANSFER_SAVE_ALL);
778 LOAD (coro);
779
780 destroy_stacks ();
781
782 LOAD ((&temp)); /* this will get rid of defsv etc.. */
783
784 coro->mainstack = 0;
785 }
786
787 stack_free (coro->stack);
788 SvREFCNT_dec (coro->args);
789 Safefree (coro);
790}
791
792static int
793coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
794{
795 struct coro *coro = (struct coro *)mg->mg_ptr;
796 mg->mg_ptr = 0;
797
798 coro_state_destroy (coro);
799
800 return 0;
801}
802
803static int
804coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
805{
806 struct coro *coro = (struct coro *)mg->mg_ptr;
807
808 ++coro->refcnt;
809
810 return 0;
811}
812
813static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
814
815static struct coro *
816SvSTATE (SV *coro)
817{
818 HV *stash;
819 MAGIC *mg;
820
821 if (SvROK (coro))
822 coro = SvRV (coro);
823
824 stash = SvSTASH (coro);
825 if (stash != coro_stash && stash != coro_state_stash)
826 {
827 /* very slow, but rare, check */
828 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829 croak ("Coro::State object required");
830 }
831
832 mg = SvMAGIC (coro);
833 assert (mg->mg_type == PERL_MAGIC_ext);
834 return (struct coro *)mg->mg_ptr;
835}
836
837static void
838prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
839{
840 ta->prev = SvSTATE (prev);
841 ta->next = SvSTATE (next);
842 ta->flags = flags;
843}
844
845static void
846api_transfer (SV *prev, SV *next, int flags)
847{
848 dTHX;
849 struct transfer_args ta;
850
851 prepare_transfer (&ta, prev, next, flags);
852 TRANSFER (ta);
853}
854
855/** Coro ********************************************************************/
856
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
870coro_enq (SV *sv)
871{
872 int prio;
873
874 if (SvTYPE (sv) != SVt_PVHV)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877 prio = SvSTATE (sv)->prio;
878
879 av_push (coro_ready [prio - PRIO_MIN], sv);
880 coro_nready++;
881}
882
883static SV *
884coro_deq (int min_prio)
885{
886 int prio = PRIO_MAX - PRIO_MIN;
887
888 min_prio -= PRIO_MIN;
889 if (min_prio < 0)
890 min_prio = 0;
891
892 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893 if (AvFILLp (coro_ready [prio]) >= 0)
894 {
895 coro_nready--;
896 return av_shift (coro_ready [prio]);
897 }
898
899 return 0;
900}
901
902static void
903api_ready (SV *coro)
904{
905 dTHX;
906
907 if (SvROK (coro))
908 coro = SvRV (coro);
909
910 LOCK;
911 coro_enq (SvREFCNT_inc (coro));
912 UNLOCK;
913}
914
915static void
916prepare_schedule (struct transfer_args *ta)
917{
918 SV *current, *prev, *next;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925 next = coro_deq (PRIO_MIN);
926 UNLOCK;
927
928 if (next)
929 break;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 }
944 }
945
946 prev = SvRV (current);
947 SvRV (current) = next;
948
949 /* free this only after the transfer */
950 LOCK;
951 free_coro_mortal ();
952 UNLOCK;
953 coro_mortal = prev;
954
955 ta->prev = SvSTATE (prev);
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958}
959
960static void
961prepare_cede (struct transfer_args *ta)
962{
963 LOCK;
964 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 prepare_schedule (ta);
968}
969
970static void
971api_schedule (void)
972{
973 dTHX;
974 struct transfer_args ta;
975
976 prepare_schedule (&ta);
977 TRANSFER (ta);
978}
979
980static void
981api_cede (void)
982{
983 dTHX;
984 struct transfer_args ta;
985
986 prepare_cede (&ta);
987 TRANSFER (ta);
988}
989
645MODULE = Coro::State PACKAGE = Coro::State 990MODULE = Coro::State PACKAGE = Coro::State
646 991
647PROTOTYPES: ENABLE 992PROTOTYPES: DISABLE
648 993
649BOOT: 994BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */ 995{
996#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex);
998#endif
999 BOOT_PAGESIZE;
1000
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE); 1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652 1002
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660 1006
661 main_mainstack = PL_mainstack; 1007 main_mainstack = PL_mainstack;
662}
663 1008
664Coro::State 1009 coroapi.ver = CORO_API_VERSION;
665_newprocess(args) 1010 coroapi.transfer = api_transfer;
666 SV * args 1011
667 PROTOTYPE: $ 1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013}
1014
1015SV *
1016new (char *klass, ...)
668 CODE: 1017 CODE:
669 Coro__State coro; 1018{
1019 struct coro *coro;
1020 HV *hv;
1021 int i;
670 1022
671 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
672 croak ("Coro::State::_newprocess expects an arrayref");
673
674 New (0, coro, 1, struct coro); 1023 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV ();
675 1025
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1026 hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029
1030 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i)));
1032
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
678 coro->sptr = 0; 1034 /*coro->stack = 0;*/
679 coro->ssize = 0; 1035}
680
681 RETVAL = coro;
682 OUTPUT: 1036 OUTPUT:
683 RETVAL 1037 RETVAL
684 1038
685void 1039void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1040_set_stacklevel (...)
687 Coro::State_or_hashref prev 1041 ALIAS:
688 Coro::State_or_hashref next 1042 Coro::State::transfer = 1
689 int flags 1043 Coro::schedule = 2
690 PROTOTYPE: @ 1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
691 CODE: 1046 CODE:
692 transfer (aTHX_ prev, next, flags); 1047{
1048 struct transfer_args ta;
1049
1050 switch (ix)
1051 {
1052 case 0:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1054 ta.next = 0;
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break;
1057
1058 case 1:
1059 if (items != 3)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1061
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1063 break;
1064
1065 case 2:
1066 prepare_schedule (&ta);
1067 break;
1068
1069 case 3:
1070 prepare_cede (&ta);
1071 break;
1072
1073 case 4:
1074 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break;
1098
1099 }
1100
1101 TRANSFER (ta);
1102}
693 1103
694void 1104void
695DESTROY(coro) 1105_clone_state_from (SV *dst, SV *src)
696 Coro::State coro 1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code)
1124 int code
1125 PROTOTYPE: $
1126 CODE:
1127 _exit (code);
1128
1129MODULE = Coro::State PACKAGE = Coro
1130
1131BOOT:
1132{
1133 int i;
1134
1135 coro_stash = gv_stashpv ("Coro", TRUE);
1136
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV ();
1149
1150 {
1151 SV *sv = perl_get_sv("Coro::API", 1);
1152
1153 coroapi.schedule = api_schedule;
1154 coroapi.cede = api_cede;
1155 coroapi.ready = api_ready;
1156 coroapi.nready = &coro_nready;
1157 coroapi.current = coro_current;
1158
1159 GCoroAPI = &coroapi;
1160 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv);
1162 }
1163}
1164
1165int
1166prio (Coro::State coro, int newprio = 0)
1167 ALIAS:
1168 nice = 1
697 CODE: 1169 CODE:
1170{
1171 RETVAL = coro->prio;
698 1172
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1173 if (items > 1)
700 { 1174 {
701 struct coro temp; 1175 if (ix)
1176 newprio += coro->prio;
702 1177
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
704 LOAD(aTHX_ coro); 1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
705 1180
706 destroy_stacks (aTHX); 1181 coro->prio = newprio;
707
708 LOAD((&temp)); /* this will get rid of defsv etc.. */
709
710 coro->mainstack = 0;
711 } 1182 }
712 1183}
713 if (coro->sptr)
714 {
715 deallocate_stack (coro);
716 coro->sptr = 0;
717 }
718
719 Safefree (coro);
720 1184
721void 1185void
722flush() 1186ready (SV *self)
1187 PROTOTYPE: $
723 CODE: 1188 CODE:
724#ifdef MAY_FLUSH 1189 api_ready (self);
725 flush_padlist_cache ();
726#endif
727 1190
1191int
1192nready (...)
1193 PROTOTYPE:
1194 CODE:
1195 RETVAL = coro_nready;
1196 OUTPUT:
1197 RETVAL
1198
728MODULE = Coro::State PACKAGE = Coro::Cont 1199MODULE = Coro::State PACKAGE = Coro::AIO
729 1200
730# this is slightly dirty 1201SV *
1202_get_state ()
1203 CODE:
1204{
1205 struct {
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211
1212 data.errorno = errno;
1213 data.laststype = PL_laststype;
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218}
1219 OUTPUT:
1220 RETVAL
731 1221
732void 1222void
733yield(...) 1223_set_state (char *data_)
734 PROTOTYPE: @ 1224 PROTOTYPE: $
735 CODE: 1225 CODE:
736 static SV *returnstk; 1226{
737 SV *sv; 1227 struct {
738 AV *defav = GvAV (PL_defgv); 1228 int errorno;
739 struct coro *prev, *next; 1229 int laststype;
1230 int laststatval;
1231 Stat_t statcache;
1232 } *data = (void *)data_;
740 1233
741 if (!returnstk) 1234 errno = data->errorno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1235 PL_laststype = data->laststype;
743 1236 PL_laststatval = data->laststatval;
744 /* set up @_ -- ugly */ 1237 PL_statcache = data->statcache;
745 av_clear (defav); 1238}
746 av_fill (defav, items - 1);
747 while (items--)
748 av_store (defav, items, SvREFCNT_inc (ST(items)));
749
750 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
751 sv = av_pop ((AV *)SvRV (returnstk));
752 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
753 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
754 SvREFCNT_dec (sv);
755
756 transfer(aTHX_ prev, next, 0);
757

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