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Comparing Coro/Coro/State.xs (file contents):
Revision 1.47 by pcg, Sat Nov 15 03:53:10 2003 UTC vs.
Revision 1.110 by root, Tue Nov 28 23:08:07 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 "patchlevel.h" 7#include "patchlevel.h"
6 8
7#if PATCHLEVEL < 6 9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
8# ifndef PL_ppaddr 20# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 21# define PL_ppaddr ppaddr
10# endif 22# endif
11# ifndef call_sv 23# ifndef call_sv
12# define call_sv perl_call_sv 24# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 35# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 36# define IS_PADCONST(v) 0
25# endif 37# endif
26#endif 38#endif
27 39
28#include "libcoro/coro.c"
29
30#include <signal.h> 40#include <stdio.h>
41#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
31 50
32#ifdef HAVE_MMAP 51#ifdef HAVE_MMAP
33# include <unistd.h> 52# include <unistd.h>
34# include <sys/mman.h> 53# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
… …
37# define MAP_ANONYMOUS MAP_ANON 56# define MAP_ANONYMOUS MAP_ANON
38# else 57# else
39# undef HAVE_MMAP 58# undef HAVE_MMAP
40# endif 59# endif
41# endif 60# endif
61# include <limits.h>
62# ifndef PAGESIZE
63# define PAGESIZE pagesize
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE (void)0
42#endif 68# endif
43 69#else
44#define MAY_FLUSH /* increases codesize and is rarely used */ 70# define PAGESIZE 0
45 71# define BOOT_PAGESIZE (void)0
46#define SUB_INIT "Coro::State::initialize" 72#endif
47#define UCORO_STATE "_coro_state"
48 73
49/* The next macro should declare a variable stacklevel that contains and approximation 74/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call 75 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */ 76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 78#define STACKLEVEL ((void *)&stacklevel)
53 79
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 81
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif
87
88#define NOINLINE attribute ((noinline))
57 89
58#include "CoroAPI.h" 90#include "CoroAPI.h"
59 91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS
95static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif
102
60static struct CoroAPI coroapi; 103static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */
105static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */
61 107
62/* this is actually not only the c stack but also c registers etc... */ 108static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle;
110
111/* this is a structure representing a c-level coroutine */
63typedef struct { 112typedef struct coro_cctx {
64 int refcnt; /* pointer reference counter */ 113 struct coro_cctx *next;
65 int usecnt; /* shared by how many coroutines */
66 int gencnt; /* generation counter */
67 114
68 coro_context cctx; 115 /* the stack */
69
70 void *sptr; 116 void *sptr;
71 long ssize; /* positive == mmap, otherwise malloc */ 117 long ssize; /* positive == mmap, otherwise malloc */
72} coro_stack;
73 118
119 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
121 JMPENV *top_env;
122 coro_context cctx;
123
124#if USE_VALGRIND
125 int valgrind_id;
126#endif
127} coro_cctx;
128
129/* this is a structure representing a perl-level coroutine */
74struct coro { 130struct coro {
75 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 131 /* the c coroutine allocated to this perl coroutine, if any */
76 JMPENV start_env; 132 coro_cctx *cctx;
77 133
78 /* the optional C context */ 134 /* data associated with this coroutine (initial args) */
79 coro_stack *stack; 135 AV *args;
80 void *cursp;
81 int gencnt; 136 int refcnt;
82 137
83 /* optionally saved, might be zero */ 138 /* optionally saved, might be zero */
84 AV *defav; 139 AV *defav;
85 SV *defsv; 140 SV *defsv;
86 SV *errsv; 141 SV *errsv;
87 142
88 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
89 U8 dowarn; 144# include "state.h"
90 I32 in_eval; 145#undef VAR
91 146
92 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
93 PERL_SI *curstackinfo; 148 int prio;
94 AV *curstack;
95 AV *mainstack;
96 SV **stack_sp;
97 OP *op;
98 SV **curpad;
99 AV *comppad;
100 SV **stack_base;
101 SV **stack_max;
102 SV **tmps_stack;
103 I32 tmps_floor;
104 I32 tmps_ix;
105 I32 tmps_max;
106 I32 *markstack;
107 I32 *markstack_ptr;
108 I32 *markstack_max;
109 I32 *scopestack;
110 I32 scopestack_ix;
111 I32 scopestack_max;
112 ANY *savestack;
113 I32 savestack_ix;
114 I32 savestack_max;
115 OP **retstack;
116 I32 retstack_ix;
117 I32 retstack_max;
118 COP *curcop;
119 JMPENV *top_env;
120
121 /* data associated with this coroutine (initial args) */
122 AV *args;
123}; 149};
124 150
125typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
126typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
127 153
128static AV *main_mainstack; /* used to differentiate between $main and others */ 154static AV *
129static HV *coro_state_stash; 155coro_clone_padlist (CV *cv)
130static SV *ucoro_state_sv;
131static U32 ucoro_state_hash;
132static HV *padlist_cache;
133static SV *coro_mortal; /* will be freed after next transfer */
134
135/* mostly copied from op.c:cv_clone2 */
136STATIC AV *
137clone_padlist (AV *protopadlist)
138{ 156{
139 AV *av; 157 AV *padlist = CvPADLIST (cv);
140 I32 ix;
141 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143 SV **pname = AvARRAY (protopad_name);
144 SV **ppad = AvARRAY (protopad);
145 I32 fname = AvFILLp (protopad_name);
146 I32 fpad = AvFILLp (protopad);
147 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
148 SV **npad;
149
150 newpad_name = newAV ();
151 for (ix = fname; ix >= 0; ix--)
152 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154 newpad = newAV ();
155 av_fill (newpad, AvFILLp (protopad));
156 npad = AvARRAY (newpad);
157 159
158 newpadlist = newAV (); 160 newpadlist = newAV ();
159 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
160 av_store (newpadlist, 0, (SV *) newpad_name); 162#if PERL_VERSION_ATLEAST (5,9,0)
163 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#endif
167 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
168 --AvFILLp (padlist);
169
170 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
162 172
163 av = newAV (); /* will be @_ */ 173 return newpadlist;
164 av_extend (av, 0); 174}
165 av_store (newpad, 0, (SV *) av);
166 AvFLAGS (av) = AVf_REIFY;
167 175
168 for (ix = fpad; ix > 0; ix--) 176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
169 { 181 {
170 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 182 I32 i = AvFILLp (padlist);
171 if (namesv && namesv != &PL_sv_undef) 183 while (i >= 0)
172 { 184 {
173 char *name = SvPVX (namesv); /* XXX */ 185 SV **svp = av_fetch (padlist, i--, FALSE);
174 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 186 if (svp)
175 { /* lexical from outside? */
176 npad[ix] = SvREFCNT_inc (ppad[ix]);
177 } 187 {
178 else
179 { /* our own lexical */
180 SV *sv; 188 SV *sv;
181 if (*name == '&') 189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182 sv = SvREFCNT_inc (ppad[ix]); 190 SvREFCNT_dec (sv);
183 else if (*name == '@') 191
184 sv = (SV *) newAV (); 192 SvREFCNT_dec (*svp);
185 else if (*name == '%')
186 sv = (SV *) newHV ();
187 else
188 sv = NEWSV (0, 0);
189 if (!SvPADBUSY (sv))
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 } 193 }
193 } 194 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 195
195 { 196 SvREFCNT_dec ((SV*)padlist);
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 } 197 }
198}
205 199
206#if 0 /* return -ENOTUNDERSTOOD */ 200static int
207 /* Now that vars are all in place, clone nested closures. */ 201coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
202{
203 AV *padlist;
204 AV *av = (AV *)mg->mg_obj;
208 205
209 for (ix = fpad; ix > 0; ix--) { 206 /* casting is fun. */
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211 if (namesv 208 free_padlist (padlist);
212 && namesv != &PL_sv_undef 209
213 && !(SvFLAGS(namesv) & SVf_FAKE) 210 SvREFCNT_dec (av);
214 && *SvPVX(namesv) == '&' 211
215 && CvCLONE(ppad[ix])) 212 return 0;
216 { 213}
217 CV *kid = cv_clone((CV*)ppad[ix]); 214
218 SvREFCNT_dec(ppad[ix]); 215#define PERL_MAGIC_coro PERL_MAGIC_ext
219 CvCLONE_on(kid); 216
220 SvPADMY_on(kid); 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221 npad[ix] = (SV*)kid; 218
222 } 219#define CORO_MAGIC(cv) \
220 SvMAGIC (cv) \
221 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
222 ? SvMAGIC (cv) \
223 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
224 : 0
225
226/* the next two functions merely cache the padlists */
227static void
228get_padlist (CV *cv)
229{
230 MAGIC *mg = CORO_MAGIC (cv);
231 AV *av;
232
233 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235 else
236 {
237#if 0
238 /* this is probably cleaner, but also slower? */
239 CV *cp = Perl_cv_clone (cv);
240 CvPADLIST (cv) = CvPADLIST (cp);
241 CvPADLIST (cp) = 0;
242 SvREFCNT_dec (cp);
243#else
244 CvPADLIST (cv) = coro_clone_padlist (cv);
245#endif
246 }
247}
248
249static void
250put_padlist (CV *cv)
251{
252 MAGIC *mg = CORO_MAGIC (cv);
253 AV *av;
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 ();
223 } 261 }
224#endif
225 262
226 return newpadlist; 263 av = (AV *)mg->mg_obj;
227}
228 264
229#ifdef MAY_FLUSH 265 if (AvFILLp (av) >= AvMAX (av))
230STATIC void 266 av_extend (av, AvMAX (av) + 1);
231free_padlist (AV *padlist)
232{
233 /* may be during global destruction */
234 if (SvREFCNT(padlist))
235 {
236 I32 i = AvFILLp(padlist);
237 while (i >= 0)
238 {
239 SV **svp = av_fetch(padlist, i--, FALSE);
240 SV *sv = svp ? *svp : Nullsv;
241 if (sv)
242 SvREFCNT_dec(sv);
243 }
244 267
245 SvREFCNT_dec((SV*)padlist); 268 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
246 }
247} 269}
248#endif
249
250/* the next two functions merely cache the padlists */
251STATIC void
252get_padlist (CV *cv)
253{
254 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
255
256 if (he && AvFILLp ((AV *)*he) >= 0)
257 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
258 else
259 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260}
261
262STATIC void
263put_padlist (CV *cv)
264{
265 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
266
267 if (SvTYPE (*he) != SVt_PVAV)
268 {
269 SvREFCNT_dec (*he);
270 *he = (SV *)newAV ();
271 }
272
273 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
274}
275
276#ifdef MAY_FLUSH
277STATIC void
278flush_padlist_cache ()
279{
280 HV *hv = padlist_cache;
281 padlist_cache = newHV ();
282
283 if (hv_iterinit (hv))
284 {
285 HE *he;
286 AV *padlist;
287
288 while (!!(he = hv_iternext (hv)))
289 {
290 AV *av = (AV *)HeVAL(he);
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (padlist);
295 }
296 }
297
298 SvREFCNT_dec (hv);
299}
300#endif
301 270
302#define SB do { 271#define SB do {
303#define SE } while (0) 272#define SE } while (0)
304 273
305#define LOAD(state) load_state(aTHX_ (state)); 274#define LOAD(state) load_state((state));
306#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 275#define SAVE(state,flags) save_state((state),(flags));
307 276
308#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 277#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
309 278
310static void 279static void
311load_state(pTHX_ Coro__State c) 280load_state(Coro__State c)
312{ 281{
313 PL_dowarn = c->dowarn; 282#define VAR(name,type) PL_ ## name = c->name;
314 PL_in_eval = c->in_eval; 283# include "state.h"
315 284#undef VAR
316 PL_curstackinfo = c->curstackinfo;
317 PL_curstack = c->curstack;
318 PL_mainstack = c->mainstack;
319 PL_stack_sp = c->stack_sp;
320 PL_op = c->op;
321 PL_curpad = c->curpad;
322 PL_comppad = c->comppad;
323 PL_stack_base = c->stack_base;
324 PL_stack_max = c->stack_max;
325 PL_tmps_stack = c->tmps_stack;
326 PL_tmps_floor = c->tmps_floor;
327 PL_tmps_ix = c->tmps_ix;
328 PL_tmps_max = c->tmps_max;
329 PL_markstack = c->markstack;
330 PL_markstack_ptr = c->markstack_ptr;
331 PL_markstack_max = c->markstack_max;
332 PL_scopestack = c->scopestack;
333 PL_scopestack_ix = c->scopestack_ix;
334 PL_scopestack_max = c->scopestack_max;
335 PL_savestack = c->savestack;
336 PL_savestack_ix = c->savestack_ix;
337 PL_savestack_max = c->savestack_max;
338 PL_retstack = c->retstack;
339 PL_retstack_ix = c->retstack_ix;
340 PL_retstack_max = c->retstack_max;
341 PL_curcop = c->curcop;
342 PL_top_env = c->top_env;
343 285
344 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 286 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 287 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 288 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347 289
… …
350 CV *cv; 292 CV *cv;
351 293
352 /* now do the ugly restore mess */ 294 /* now do the ugly restore mess */
353 while ((cv = (CV *)POPs)) 295 while ((cv = (CV *)POPs))
354 { 296 {
355 AV *padlist = (AV *)POPs;
356
357 if (padlist)
358 {
359 put_padlist (cv); /* mark this padlist as available */ 297 put_padlist (cv); /* mark this padlist as available */
360 CvPADLIST(cv) = padlist; 298 CvDEPTH (cv) = PTR2IV (POPs);
361#ifdef USE_THREADS 299 CvPADLIST (cv) = (AV *)POPs;
362 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363#endif
364 }
365
366 ++CvDEPTH(cv);
367 } 300 }
368 301
369 PUTBACK; 302 PUTBACK;
370 } 303 }
371} 304}
372 305
373static void 306static void
374save_state(pTHX_ Coro__State c, int flags) 307save_state(Coro__State c, int flags)
375{ 308{
376 { 309 {
377 dSP; 310 dSP;
378 I32 cxix = cxstack_ix; 311 I32 cxix = cxstack_ix;
379 PERL_CONTEXT *ccstk = cxstack; 312 PERL_CONTEXT *ccstk = cxstack;
… …
393 PERL_CONTEXT *cx = &ccstk[cxix--]; 326 PERL_CONTEXT *cx = &ccstk[cxix--];
394 327
395 if (CxTYPE(cx) == CXt_SUB) 328 if (CxTYPE(cx) == CXt_SUB)
396 { 329 {
397 CV *cv = cx->blk_sub.cv; 330 CV *cv = cx->blk_sub.cv;
331
398 if (CvDEPTH(cv)) 332 if (CvDEPTH (cv))
399 { 333 {
400#ifdef USE_THREADS
401 /*XPUSHs ((SV *)CvOWNER(cv));*/
402 /*CvOWNER(cv) = 0;*/
403 /*error must unlock this cv etc.. etc...*/
404#endif
405 EXTEND (SP, CvDEPTH(cv)*2); 334 EXTEND (SP, 3);
406
407 while (--CvDEPTH(cv))
408 {
409 /* this tells the restore code to increment CvDEPTH */
410 PUSHs (Nullsv);
411 PUSHs ((SV *)cv);
412 }
413 335
414 PUSHs ((SV *)CvPADLIST(cv)); 336 PUSHs ((SV *)CvPADLIST(cv));
337 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415 PUSHs ((SV *)cv); 338 PUSHs ((SV *)cv);
416 339
340 CvDEPTH (cv) = 0;
417 get_padlist (cv); /* this is a monster */ 341 get_padlist (cv);
418 } 342 }
419 } 343 }
420#ifdef CXt_FORMAT 344#ifdef CXt_FORMAT
421 else if (CxTYPE(cx) == CXt_FORMAT) 345 else if (CxTYPE(cx) == CXt_FORMAT)
422 { 346 {
… …
440 364
441 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 365 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 366 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 367 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
444 368
445 c->dowarn = PL_dowarn; 369#define VAR(name,type)c->name = PL_ ## name;
446 c->in_eval = PL_in_eval; 370# include "state.h"
447 371#undef VAR
448 c->curstackinfo = PL_curstackinfo;
449 c->curstack = PL_curstack;
450 c->mainstack = PL_mainstack;
451 c->stack_sp = PL_stack_sp;
452 c->op = PL_op;
453 c->curpad = PL_curpad;
454 c->comppad = PL_comppad;
455 c->stack_base = PL_stack_base;
456 c->stack_max = PL_stack_max;
457 c->tmps_stack = PL_tmps_stack;
458 c->tmps_floor = PL_tmps_floor;
459 c->tmps_ix = PL_tmps_ix;
460 c->tmps_max = PL_tmps_max;
461 c->markstack = PL_markstack;
462 c->markstack_ptr = PL_markstack_ptr;
463 c->markstack_max = PL_markstack_max;
464 c->scopestack = PL_scopestack;
465 c->scopestack_ix = PL_scopestack_ix;
466 c->scopestack_max = PL_scopestack_max;
467 c->savestack = PL_savestack;
468 c->savestack_ix = PL_savestack_ix;
469 c->savestack_max = PL_savestack_max;
470 c->retstack = PL_retstack;
471 c->retstack_ix = PL_retstack_ix;
472 c->retstack_max = PL_retstack_max;
473 c->curcop = PL_curcop;
474 c->top_env = PL_top_env;
475} 372}
476 373
477/* 374/*
478 * allocate various perl stacks. This is an exact copy 375 * allocate various perl stacks. This is an exact copy
479 * of perl.c:init_stacks, except that it uses less memory 376 * of perl.c:init_stacks, except that it uses less memory
480 * on the assumption that coroutines do not usually need 377 * on the (sometimes correct) assumption that coroutines do
481 * a lot of stackspace. 378 * not usually need a lot of stackspace.
482 */ 379 */
483STATIC void 380static void
484coro_init_stacks (pTHX) 381coro_init_stacks ()
485{ 382{
486 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 383 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487 PL_curstackinfo->si_type = PERLSI_MAIN; 384 PL_curstackinfo->si_type = PERLSI_MAIN;
488 PL_curstack = PL_curstackinfo->si_stack; 385 PL_curstack = PL_curstackinfo->si_stack;
489 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
511 408
512 New(54,PL_savestack,96,ANY); 409 New(54,PL_savestack,96,ANY);
513 PL_savestack_ix = 0; 410 PL_savestack_ix = 0;
514 PL_savestack_max = 96; 411 PL_savestack_max = 96;
515 412
413#if !PERL_VERSION_ATLEAST (5,9,0)
516 New(54,PL_retstack,8,OP*); 414 New(54,PL_retstack,8,OP*);
517 PL_retstack_ix = 0; 415 PL_retstack_ix = 0;
518 PL_retstack_max = 8; 416 PL_retstack_max = 8;
417#endif
519} 418}
520 419
521/* 420/*
522 * destroy the stacks, the callchain etc... 421 * destroy the stacks, the callchain etc...
523 * still there is a memleak of 128 bytes...
524 */ 422 */
525STATIC void 423static void
526destroy_stacks(pTHX) 424coro_destroy_stacks ()
527{ 425{
528 if (!IN_DESTRUCT) 426 if (!IN_DESTRUCT)
529 { 427 {
530 /* is this ugly, I ask? */ 428 /* is this ugly, I ask? */
531 while (PL_scopestack_ix) 429 LEAVE_SCOPE (0);
532 LEAVE;
533 430
534 /* sure it is, but more important: is it correct?? :/ */ 431 /* sure it is, but more important: is it correct?? :/ */
535 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536 FREETMPS; 432 FREETMPS;
433
434 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537 } 435 }
538 436
539 while (PL_curstackinfo->si_next) 437 while (PL_curstackinfo->si_next)
540 PL_curstackinfo = PL_curstackinfo->si_next; 438 PL_curstackinfo = PL_curstackinfo->si_next;
541 439
542 while (PL_curstackinfo) 440 while (PL_curstackinfo)
543 { 441 {
544 PERL_SI *p = PL_curstackinfo->si_prev; 442 PERL_SI *p = PL_curstackinfo->si_prev;
545 443
546 { 444 { /*D*//*remove*/
547 dSP; 445 dSP;
548 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 446 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549 PUTBACK; /* possibly superfluous */ 447 PUTBACK; /* possibly superfluous */
550 } 448 }
551 449
552 if (!IN_DESTRUCT) 450 if (!IN_DESTRUCT)
553 { 451 {
554 dounwind(-1); 452 dounwind (-1);/*D*//*remove*/
555 SvREFCNT_dec(PL_curstackinfo->si_stack); 453 SvREFCNT_dec (PL_curstackinfo->si_stack);
556 } 454 }
557 455
558 Safefree(PL_curstackinfo->si_cxstack); 456 Safefree (PL_curstackinfo->si_cxstack);
559 Safefree(PL_curstackinfo); 457 Safefree (PL_curstackinfo);
560 PL_curstackinfo = p; 458 PL_curstackinfo = p;
561 } 459 }
562 460
563 Safefree(PL_tmps_stack); 461 Safefree (PL_tmps_stack);
564 Safefree(PL_markstack); 462 Safefree (PL_markstack);
565 Safefree(PL_scopestack); 463 Safefree (PL_scopestack);
566 Safefree(PL_savestack); 464 Safefree (PL_savestack);
465#if !PERL_VERSION_ATLEAST (5,9,0)
567 Safefree(PL_retstack); 466 Safefree (PL_retstack);
568}
569
570static void
571allocate_stack (Coro__State ctx, int alloc)
572{
573 coro_stack *stack;
574
575 New (0, stack, 1, coro_stack);
576
577 stack->refcnt = 1;
578 stack->usecnt = 1;
579 stack->gencnt = ctx->gencnt = 0;
580 if (alloc)
581 {
582#if HAVE_MMAP
583 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585 if (stack->sptr == (void *)-1)
586#endif 467#endif
587 {
588 /*FIXME*//*D*//* reasonable stack size! */
589 stack->ssize = -4096 * sizeof (long);
590 New (0, stack->sptr, 4096, long);
591 }
592 }
593 else
594 stack->sptr = 0;
595
596 ctx->stack = stack;
597} 468}
598 469
599static void 470static void
600deallocate_stack (Coro__State ctx) 471setup_coro (struct coro *coro)
601{
602 coro_stack *stack = ctx->stack;
603
604 ctx->stack = 0;
605
606 if (stack)
607 {
608 if (!--stack->refcnt)
609 {
610#ifdef HAVE_MMAP
611 if (stack->ssize > 0 && stack->sptr)
612 munmap (stack->sptr, stack->ssize);
613 else
614#endif
615 Safefree (stack->sptr);
616
617 Safefree (stack);
618 }
619 else if (ctx->gencnt == stack->gencnt)
620 --stack->usecnt;
621 }
622}
623
624static void
625setup_coro (void *arg)
626{ 472{
627 /* 473 /*
628 * emulate part of the perl startup here. 474 * emulate part of the perl startup here.
629 */ 475 */
630 dSP;
631 Coro__State ctx = (Coro__State)arg;
632 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
633 476
634 coro_init_stacks (aTHX); 477 coro_init_stacks ();
478
635 /*PL_curcop = 0;*/ 479 PL_curcop = 0;
636 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 480 PL_in_eval = 0;
481 PL_curpm = 0;
482
483 {
484 dSP;
485 LOGOP myop;
486
487 /* I have no idea why this is needed, but it is */
488 PUSHMARK (SP);
489
637 SvREFCNT_dec (GvAV (PL_defgv)); 490 SvREFCNT_dec (GvAV (PL_defgv));
638 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 491 GvAV (PL_defgv) = coro->args; coro->args = 0;
639 492
640 SPAGAIN;
641
642 if (ctx->stack)
643 {
644 ctx->cursp = 0;
645
646 PUSHMARK(SP);
647 PUTBACK;
648 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650 if (SvTRUE (ERRSV))
651 croak (NULL);
652 else
653 croak ("FATAL: CCTXT coroutine returned!");
654 }
655 else
656 {
657 UNOP myop;
658
659 PL_op = (OP *)&myop;
660
661 Zero(&myop, 1, UNOP); 493 Zero (&myop, 1, LOGOP);
662 myop.op_next = Nullop; 494 myop.op_next = Nullop;
663 myop.op_flags = OPf_WANT_VOID; 495 myop.op_flags = OPf_WANT_VOID;
664 496
497 PL_op = (OP *)&myop;
498
665 PUSHMARK(SP); 499 PUSHMARK (SP);
666 XPUSHs (sub_init); 500 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
667 /*
668 * the next line is slightly wrong, as PL_op->op_next
669 * is actually being executed so we skip the first op.
670 * that doesn't matter, though, since it is only
671 * pp_nextstate and we never return...
672 * ah yes, and I don't care anyways ;)
673 */
674 PUTBACK; 501 PUTBACK;
675 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 502 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676 SPAGAIN; 503 SPAGAIN;
677 504
678 ENTER; /* necessary e.g. for dounwind */ 505 ENTER; /* necessary e.g. for dounwind */
679 } 506 }
680} 507}
681 508
682static void 509static void
683continue_coro (void *arg) 510free_coro_mortal ()
684{ 511{
685 /*
686 * this is a _very_ stripped down perl interpreter ;)
687 */
688 Coro__State ctx = (Coro__State)arg;
689 JMPENV coro_start_env;
690
691 PL_top_env = &ctx->start_env;
692
693 ctx->cursp = 0;
694 PL_op = PL_op->op_next;
695 CALLRUNOPS(aTHX);
696
697 abort ();
698}
699
700STATIC void
701transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
702{
703 dSTACKLEVEL;
704 static struct coro *xnext;
705
706 if (prev != next)
707 {
708 xnext = next;
709
710 if (next->mainstack)
711 {
712 SAVE (prev, flags);
713 LOAD (next);
714
715 /* mark this state as in-use */
716 next->mainstack = 0;
717 next->tmps_ix = -2;
718
719 /* stacklevel changed? if yes, grab the stack for us! */
720 if (flags & TRANSFER_SAVE_CCTXT)
721 {
722 if (!prev->stack)
723 allocate_stack (prev, 0);
724 else if (prev->cursp != stacklevel
725 && prev->stack->usecnt > 1)
726 {
727 prev->gencnt = ++prev->stack->gencnt;
728 prev->stack->usecnt = 1;
729 }
730
731 /* has our stack been invalidated? */
732 if (next->stack && next->stack->gencnt != next->gencnt)
733 {
734 deallocate_stack (next);
735 allocate_stack (next, 1);
736 coro_create (&(next->stack->cctx),
737 continue_coro, (void *)next,
738 next->stack->sptr, labs (next->stack->ssize));
739 }
740
741 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742 /* don't add any code here */
743 }
744
745 }
746 else if (next->tmps_ix == -2)
747 croak ("tried to transfer to running coroutine");
748 else
749 {
750 SAVE (prev, -1); /* first get rid of the old state */
751
752 if (flags & TRANSFER_SAVE_CCTXT)
753 {
754 if (!prev->stack)
755 allocate_stack (prev, 0);
756
757 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758 {
759 PL_top_env = &next->start_env;
760
761 setup_coro (next);
762
763 prev->stack->refcnt++;
764 prev->stack->usecnt++;
765 next->stack = prev->stack;
766 next->gencnt = prev->gencnt;
767 }
768 else
769 {
770 assert (!next->stack);
771 allocate_stack (next, 1);
772 coro_create (&(next->stack->cctx),
773 setup_coro, (void *)next,
774 next->stack->sptr, labs (next->stack->ssize));
775 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
776 /* don't add any code here */
777 }
778 }
779 else
780 setup_coro (next);
781 }
782
783 /*
784 * xnext is now either prev or next, depending on wether
785 * we switched the c stack or not. that's why I use a global
786 * variable, that should become thread-specific at one point.
787 */
788 xnext->cursp = stacklevel;
789 }
790
791 if (coro_mortal) 512 if (coro_mortal)
792 { 513 {
793 SvREFCNT_dec (coro_mortal); 514 SvREFCNT_dec (coro_mortal);
794 coro_mortal = 0; 515 coro_mortal = 0;
795 } 516 }
796} 517}
797 518
798#define SV_CORO(sv,func) \ 519static void NOINLINE
799 do { \ 520prepare_cctx (coro_cctx *cctx)
800 if (SvROK (sv)) \ 521{
801 sv = SvRV (sv); \ 522 dSP;
802 \ 523 LOGOP myop;
803 if (SvTYPE(sv) == SVt_PVHV) \
804 { \
805 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
806 \
807 if (!he) \
808 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
809 \
810 (sv) = SvRV (HeVAL(he)); \
811 } \
812 \
813 /* must also be changed inside Coro::Cont::yield */ \
814 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
815 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
816 \
817 } while(0)
818 524
819#define SvSTATE(sv) (struct coro *)SvIV (sv) 525 Zero (&myop, 1, LOGOP);
526 myop.op_next = PL_op;
527 myop.op_flags = OPf_WANT_VOID;
820 528
529 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530
531 PUSHMARK (SP);
532 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533 PUTBACK;
534 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
535 SPAGAIN;
536}
537
538static void
539coro_run (void *arg)
540{
541 /* coro_run is the alternative epilogue of transfer() */
542 UNLOCK;
543
544 /*
545 * this is a _very_ stripped down perl interpreter ;)
546 */
547 PL_top_env = &PL_start_env;
548
549 /* inject call to cctx_init */
550 prepare_cctx ((coro_cctx *)arg);
551
552 /* somebody will hit me for both perl_run and PL_restartop */
553 perl_run (PL_curinterp);
554
555 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556 abort ();
557}
558
559static coro_cctx *
560cctx_new ()
561{
562 coro_cctx *cctx;
563
564 ++cctx_count;
565
566 New (0, cctx, 1, coro_cctx);
567
568#if HAVE_MMAP
569
570 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
571 /* mmap suppsedly does allocate-on-write for us */
572 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573
574 if (cctx->sptr == (void *)-1)
575 {
576 perror ("FATAL: unable to mmap stack for coroutine");
577 _exit (EXIT_FAILURE);
578 }
579
580# if STACKGUARD
581 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
582# endif
583
584#else
585
586 cctx->ssize = STACKSIZE * (long)sizeof (long);
587 New (0, cctx->sptr, STACKSIZE, long);
588
589 if (!cctx->sptr)
590 {
591 perror ("FATAL: unable to malloc stack for coroutine");
592 _exit (EXIT_FAILURE);
593 }
594
595#endif
596
597#if USE_VALGRIND
598 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600 cctx->ssize + (char *)cctx->sptr
601 );
602#endif
603
604 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
605
606 return cctx;
607}
608
609static void
610cctx_free (coro_cctx *cctx)
611{
612 if (!cctx)
613 return;
614
615 --cctx_count;
616
617#if USE_VALGRIND
618 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619#endif
620
621#if HAVE_MMAP
622 munmap (cctx->sptr, cctx->ssize);
623#else
624 Safefree (cctx->sptr);
625#endif
626
627 Safefree (cctx);
628}
629
630static coro_cctx *
631cctx_get ()
632{
633 coro_cctx *cctx;
634
635 if (cctx_first)
636 {
637 --cctx_idle;
638 cctx = cctx_first;
639 cctx_first = cctx->next;
640 }
641 else
642 {
643 cctx = cctx_new ();
644 PL_op = PL_op->op_next;
645 }
646
647 return cctx;
648}
649
650static void
651cctx_put (coro_cctx *cctx)
652{
653 ++cctx_idle;
654 cctx->next = cctx_first;
655 cctx_first = cctx;
656}
657
658/* never call directly, always through the coro_state_transfer global variable */
659static void NOINLINE
660transfer (struct coro *prev, struct coro *next, int flags)
661{
662 dSTACKLEVEL;
663
664 /* sometimes transfer is only called to set idle_sp */
665 if (flags == TRANSFER_SET_STACKLEVEL)
666 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
667 else if (prev != next)
668 {
669 coro_cctx *prev__cctx;
670
671 LOCK;
672
673 if (next->mainstack)
674 {
675 /* coroutine already started */
676 SAVE (prev, flags);
677 LOAD (next);
678 }
679 else
680 {
681 /* need to start coroutine */
682 /* first get rid of the old state */
683 SAVE (prev, -1);
684 /* setup coroutine call */
685 setup_coro (next);
686 /* need a stack */
687 next->cctx = 0;
688 }
689
690 if (!prev->cctx)
691 /* create a new empty context */
692 Newz (0, prev->cctx, 1, coro_cctx);
693
694 prev__cctx = prev->cctx;
695
696 /* possibly "free" the cctx */
697 if (prev__cctx->idle_sp == STACKLEVEL)
698 {
699 assert (PL_top_env == prev__cctx->top_env);//D
700 cctx_put (prev__cctx);
701 prev->cctx = 0;
702 }
703
704 if (!next->cctx)
705 next->cctx = cctx_get ();
706
707 if (prev__cctx != next->cctx)
708 {
709 prev__cctx->top_env = PL_top_env;
710 PL_top_env = next->cctx->top_env;
711 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712 }
713
714 free_coro_mortal ();
715
716 UNLOCK;
717 }
718}
719
720struct transfer_args
721{
722 struct coro *prev, *next;
723 int flags;
724};
725
726#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
727
728static void
729coro_state_destroy (struct coro *coro)
730{
731 if (coro->refcnt--)
732 return;
733
734 if (coro->mainstack && coro->mainstack != main_mainstack)
735 {
736 struct coro temp;
737
738 SAVE ((&temp), TRANSFER_SAVE_ALL);
739 LOAD (coro);
740
741 coro_destroy_stacks ();
742
743 LOAD ((&temp)); /* this will get rid of defsv etc.. */
744
745 coro->mainstack = 0;
746 }
747
748 cctx_free (coro->cctx);
749 SvREFCNT_dec (coro->args);
750 Safefree (coro);
751}
752
821static void 753static int
754coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
755{
756 struct coro *coro = (struct coro *)mg->mg_ptr;
757 mg->mg_ptr = 0;
758
759 coro_state_destroy (coro);
760
761 return 0;
762}
763
764static int
765coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766{
767 struct coro *coro = (struct coro *)mg->mg_ptr;
768
769 ++coro->refcnt;
770
771 return 0;
772}
773
774static MGVTBL coro_state_vtbl = {
775 0, 0, 0, 0,
776 coro_state_clear,
777 0,
778#ifdef MGf_DUP
779 coro_state_dup,
780#else
781# define MGf_DUP 0
782#endif
783};
784
785static struct coro *
786SvSTATE (SV *coro)
787{
788 HV *stash;
789 MAGIC *mg;
790
791 if (SvROK (coro))
792 coro = SvRV (coro);
793
794 stash = SvSTASH (coro);
795 if (stash != coro_stash && stash != coro_state_stash)
796 {
797 /* very slow, but rare, check */
798 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799 croak ("Coro::State object required");
800 }
801
802 mg = SvMAGIC (coro);
803 assert (mg->mg_type == PERL_MAGIC_ext);
804 return (struct coro *)mg->mg_ptr;
805}
806
807static void
808prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
809{
810 ta->prev = SvSTATE (prev);
811 ta->next = SvSTATE (next);
812 ta->flags = flags;
813}
814
815static void
822api_transfer(pTHX_ SV *prev, SV *next, int flags) 816api_transfer (SV *prev, SV *next, int flags)
823{ 817{
824 SV_CORO (prev, "Coro::transfer"); 818 dTHX;
825 SV_CORO (next, "Coro::transfer"); 819 struct transfer_args ta;
826 820
827 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 821 prepare_transfer (&ta, prev, next, flags);
822 TRANSFER (ta);
828} 823}
829 824
830/** Coro ********************************************************************/ 825/** Coro ********************************************************************/
831 826
832#define PRIO_MAX 3 827#define PRIO_MAX 3
… …
836#define PRIO_IDLE -3 831#define PRIO_IDLE -3
837#define PRIO_MIN -4 832#define PRIO_MIN -4
838 833
839/* for Coro.pm */ 834/* for Coro.pm */
840static GV *coro_current, *coro_idle; 835static GV *coro_current, *coro_idle;
841static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 836static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
842static int coro_nready; 837static int coro_nready;
843 838
844static void 839static void
845coro_enq (SV *sv) 840coro_enq (SV *sv)
846{ 841{
842 int prio;
843
847 if (SvTYPE (sv) == SVt_PVHV) 844 if (SvTYPE (sv) != SVt_PVHV)
848 {
849 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
850 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
851
852 prio = prio > PRIO_MAX ? PRIO_MAX
853 : prio < PRIO_MIN ? PRIO_MIN
854 : prio;
855
856 av_push (coro_ready [prio - PRIO_MIN], sv);
857 coro_nready++;
858
859 return;
860 }
861
862 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 845 croak ("Coro::ready tried to enqueue something that is not a coroutine");
846
847 prio = SvSTATE (sv)->prio;
848
849 av_push (coro_ready [prio - PRIO_MIN], sv);
850 coro_nready++;
863} 851}
864 852
865static SV * 853static SV *
866coro_deq (int min_prio) 854coro_deq (int min_prio)
867{ 855{
… …
870 min_prio -= PRIO_MIN; 858 min_prio -= PRIO_MIN;
871 if (min_prio < 0) 859 if (min_prio < 0)
872 min_prio = 0; 860 min_prio = 0;
873 861
874 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 862 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
875 if (av_len (coro_ready[prio]) >= 0) 863 if (AvFILLp (coro_ready [prio]) >= 0)
876 { 864 {
877 coro_nready--; 865 coro_nready--;
878 return av_shift (coro_ready[prio]); 866 return av_shift (coro_ready [prio]);
879 } 867 }
880 868
881 return 0; 869 return 0;
882} 870}
883 871
884static void 872static void
885api_ready (SV *coro) 873api_ready (SV *coro)
886{ 874{
875 dTHX;
876
887 if (SvROK (coro)) 877 if (SvROK (coro))
888 coro = SvRV (coro); 878 coro = SvRV (coro);
889 879
880 LOCK;
890 coro_enq (SvREFCNT_inc (coro)); 881 coro_enq (SvREFCNT_inc (coro));
882 UNLOCK;
883}
884
885static void
886prepare_schedule (struct transfer_args *ta)
887{
888 SV *current, *prev, *next;
889
890 current = GvSV (coro_current);
891
892 for (;;)
893 {
894 LOCK;
895 next = coro_deq (PRIO_MIN);
896 UNLOCK;
897
898 if (next)
899 break;
900
901 {
902 dSP;
903
904 ENTER;
905 SAVETMPS;
906
907 PUSHMARK (SP);
908 PUTBACK;
909 call_sv (GvSV (coro_idle), G_DISCARD);
910
911 FREETMPS;
912 LEAVE;
913 }
914 }
915
916 prev = SvRV (current);
917 SvRV (current) = next;
918
919 /* free this only after the transfer */
920 LOCK;
921 free_coro_mortal ();
922 UNLOCK;
923 coro_mortal = prev;
924
925 ta->prev = SvSTATE (prev);
926 ta->next = SvSTATE (next);
927 ta->flags = TRANSFER_SAVE_ALL;
928}
929
930static void
931prepare_cede (struct transfer_args *ta)
932{
933 LOCK;
934 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935 UNLOCK;
936
937 prepare_schedule (ta);
891} 938}
892 939
893static void 940static void
894api_schedule (void) 941api_schedule (void)
895{ 942{
896 SV *prev, *next; 943 dTHX;
944 struct transfer_args ta;
897 945
898 prev = SvRV (GvSV (coro_current)); 946 prepare_schedule (&ta);
899 next = coro_deq (PRIO_MIN); 947 TRANSFER (ta);
900
901 if (!next)
902 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
903
904 /* free this only after the transfer */
905 coro_mortal = prev;
906 SV_CORO (prev, "Coro::schedule");
907
908 SvRV (GvSV (coro_current)) = next;
909
910 SV_CORO (next, "Coro::schedule");
911
912 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
913 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
914} 948}
915 949
916static void 950static void
917api_cede (void) 951api_cede (void)
918{ 952{
919 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 953 dTHX;
954 struct transfer_args ta;
920 955
921 api_schedule (); 956 prepare_cede (&ta);
957 TRANSFER (ta);
922} 958}
923 959
924MODULE = Coro::State PACKAGE = Coro::State 960MODULE = Coro::State PACKAGE = Coro::State
925 961
926PROTOTYPES: ENABLE 962PROTOTYPES: DISABLE
927 963
928BOOT: 964BOOT:
929{ /* {} necessary for stoopid perl-5.6.x */ 965{
930 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 966#ifdef USE_ITHREADS
931 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 967 MUTEX_INIT (&coro_mutex);
968#endif
969 BOOT_PAGESIZE;
970
932 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 971 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
933 972
934 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
935 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
936 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
937 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
938
939 if (!padlist_cache)
940 padlist_cache = newHV ();
941 976
942 main_mainstack = PL_mainstack; 977 main_mainstack = PL_mainstack;
943 978
944 coroapi.ver = CORO_API_VERSION; 979 coroapi.ver = CORO_API_VERSION;
945 coroapi.transfer = api_transfer; 980 coroapi.transfer = api_transfer;
946}
947 981
948Coro::State 982 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
949_newprocess(args) 983}
950 SV * args 984
951 PROTOTYPE: $ 985SV *
986new (char *klass, ...)
952 CODE: 987 CODE:
953 Coro__State coro; 988{
989 struct coro *coro;
990 HV *hv;
991 int i;
954 992
955 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
956 croak ("Coro::State::_newprocess expects an arrayref");
957
958 Newz (0, coro, 1, struct coro); 993 Newz (0, coro, 1, struct coro);
994 coro->args = newAV ();
959 995
960 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 996 hv = newHV ();
961 coro->mainstack = 0; /* actual work is done inside transfer */ 997 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
962 coro->stack = 0; 998 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
963 999
964 /* same as JMPENV_BOOTSTRAP */ 1000 for (i = 1; i < items; i++)
965 /* we might be able to recycle start_env, but safe is safe */ 1001 av_push (coro->args, newSVsv (ST (i)));
966 //Zero(&coro->start_env, 1, JMPENV); 1002}
967 coro->start_env.je_ret = -1;
968 coro->start_env.je_mustcatch = TRUE;
969
970 RETVAL = coro;
971 OUTPUT: 1003 OUTPUT:
972 RETVAL 1004 RETVAL
973 1005
974void 1006void
975transfer(prev, next, flags) 1007_set_stacklevel (...)
976 SV *prev 1008 ALIAS:
977 SV *next 1009 Coro::State::transfer = 1
978 int flags 1010 Coro::schedule = 2
979 PROTOTYPE: @ 1011 Coro::cede = 3
1012 Coro::Cont::yield = 4
980 CODE: 1013 CODE:
981 PUTBACK; 1014{
982 SV_CORO (next, "Coro::transfer"); 1015 struct transfer_args ta;
983 SV_CORO (prev, "Coro::transfer"); 1016
984 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1017 switch (ix)
985 SPAGAIN; 1018 {
1019 case 0:
1020 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1021 ta.next = 0;
1022 ta.flags = TRANSFER_SET_STACKLEVEL;
1023 break;
1024
1025 case 1:
1026 if (items != 3)
1027 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1028
1029 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1030 break;
1031
1032 case 2:
1033 prepare_schedule (&ta);
1034 break;
1035
1036 case 3:
1037 prepare_cede (&ta);
1038 break;
1039
1040 case 4:
1041 {
1042 SV *yieldstack;
1043 SV *sv;
1044 AV *defav = GvAV (PL_defgv);
1045
1046 yieldstack = *hv_fetch (
1047 (HV *)SvRV (GvSV (coro_current)),
1048 "yieldstack", sizeof ("yieldstack") - 1,
1049 0
1050 );
1051
1052 /* set up @_ -- ugly */
1053 av_clear (defav);
1054 av_fill (defav, items - 1);
1055 while (items--)
1056 av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058 sv = av_pop ((AV *)SvRV (yieldstack));
1059 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1060 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1061 ta.flags = 0;
1062 SvREFCNT_dec (sv);
1063 }
1064 break;
1065
1066 }
1067
1068 TRANSFER (ta);
1069}
986 1070
987void 1071void
988DESTROY(coro) 1072_clone_state_from (SV *dst, SV *src)
989 Coro::State coro 1073 CODE:
990 CODE: 1074{
1075 struct coro *coro_src = SvSTATE (src);
991 1076
992 if (coro->mainstack && coro->mainstack != main_mainstack) 1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
993 {
994 struct coro temp;
995 1078
996 PUTBACK; 1079 ++coro_src->refcnt;
997 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1080 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
998 LOAD(aTHX_ coro); 1081}
999 SPAGAIN;
1000
1001 destroy_stacks (aTHX);
1002
1003 LOAD((&temp)); /* this will get rid of defsv etc.. */
1004 SPAGAIN;
1005
1006 coro->mainstack = 0;
1007 }
1008
1009 deallocate_stack (coro);
1010 SvREFCNT_dec (coro->args);
1011 Safefree (coro);
1012 1082
1013void 1083void
1014flush()
1015 CODE:
1016#ifdef MAY_FLUSH
1017 flush_padlist_cache ();
1018#endif
1019
1020void
1021_exit(code) 1084_exit (code)
1022 int code 1085 int code
1023 PROTOTYPE: $ 1086 PROTOTYPE: $
1024 CODE: 1087 CODE:
1025#if defined(__GLIBC__) || _POSIX_C_SOURCE
1026 _exit (code); 1088 _exit (code);
1027#else
1028 signal (SIGTERM, SIG_DFL);
1029 raise (SIGTERM);
1030 exit (code);
1031#endif
1032 1089
1033MODULE = Coro::State PACKAGE = Coro::Cont 1090int
1091cctx_count ()
1092 CODE:
1093 RETVAL = cctx_count;
1094 OUTPUT:
1095 RETVAL
1034 1096
1035# this is slightly dirty (should expose a c-level api) 1097int
1036 1098cctx_idle ()
1037void 1099 CODE:
1038yield(...) 1100 RETVAL = cctx_idle;
1039 PROTOTYPE: @ 1101 OUTPUT:
1040 CODE: 1102 RETVAL
1041 static SV *returnstk;
1042 SV *sv;
1043 AV *defav = GvAV (PL_defgv);
1044 struct coro *prev, *next;
1045
1046 if (!returnstk)
1047 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1048
1049 /* set up @_ -- ugly */
1050 av_clear (defav);
1051 av_fill (defav, items - 1);
1052 while (items--)
1053 av_store (defav, items, SvREFCNT_inc (ST(items)));
1054
1055 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1056 sv = av_pop ((AV *)SvRV (returnstk));
1057 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1058 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1059 SvREFCNT_dec (sv);
1060
1061 transfer(aTHX_ prev, next, 0);
1062 1103
1063MODULE = Coro::State PACKAGE = Coro 1104MODULE = Coro::State PACKAGE = Coro
1064 1105
1065# this is slightly dirty (should expose a c-level api)
1066
1067BOOT: 1106BOOT:
1068{ 1107{
1069 int i; 1108 int i;
1109
1070 HV *stash = gv_stashpv ("Coro", TRUE); 1110 coro_stash = gv_stashpv ("Coro", TRUE);
1071 1111
1072 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1112 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1073 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1113 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1074 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1114 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1075 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1115 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1076 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1116 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1077 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1117 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1078 1118
1079 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1119 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1080 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1120 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1081 1121
1082 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1122 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
… …
1090 coroapi.ready = api_ready; 1130 coroapi.ready = api_ready;
1091 coroapi.nready = &coro_nready; 1131 coroapi.nready = &coro_nready;
1092 coroapi.current = coro_current; 1132 coroapi.current = coro_current;
1093 1133
1094 GCoroAPI = &coroapi; 1134 GCoroAPI = &coroapi;
1095 sv_setiv(sv, (IV)&coroapi); 1135 sv_setiv (sv, (IV)&coroapi);
1096 SvREADONLY_on(sv); 1136 SvREADONLY_on (sv);
1097 } 1137 }
1098} 1138}
1099 1139
1140int
1141prio (Coro::State coro, int newprio = 0)
1142 ALIAS:
1143 nice = 1
1144 CODE:
1145{
1146 RETVAL = coro->prio;
1147
1148 if (items > 1)
1149 {
1150 if (ix)
1151 newprio += coro->prio;
1152
1153 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155
1156 coro->prio = newprio;
1157 }
1158}
1159
1100void 1160void
1101ready(self) 1161ready (SV *self)
1102 SV * self
1103 PROTOTYPE: $ 1162 PROTOTYPE: $
1104 CODE: 1163 CODE:
1105 api_ready (self); 1164 api_ready (self);
1106 1165
1107int 1166int
1108nready(...) 1167nready (...)
1109 PROTOTYPE: 1168 PROTOTYPE:
1110 CODE: 1169 CODE:
1111 RETVAL = coro_nready; 1170 RETVAL = coro_nready;
1112 OUTPUT: 1171 OUTPUT:
1113 RETVAL 1172 RETVAL
1114 1173
1174MODULE = Coro::State PACKAGE = Coro::AIO
1175
1176SV *
1177_get_state ()
1178 CODE:
1179{
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT:
1195 RETVAL
1196
1115void 1197void
1116schedule(...) 1198_set_state (char *data_)
1117 PROTOTYPE: 1199 PROTOTYPE: $
1118 CODE: 1200 CODE:
1119 api_schedule (); 1201{
1202 struct {
1203 int errorno;
1204 int laststype;
1205 int laststatval;
1206 Stat_t statcache;
1207 } *data = (void *)data_;
1120 1208
1121void 1209 errno = data->errorno;
1122cede(...) 1210 PL_laststype = data->laststype;
1123 PROTOTYPE: 1211 PL_laststatval = data->laststatval;
1124 CODE: 1212 PL_statcache = data->statcache;
1125 api_cede (); 1213}
1126

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