ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC

1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c" 1#include "libcoro/coro.c"
4 2
5#include "EXTERN.h" 3#include "EXTERN.h"
6#include "perl.h" 4#include "perl.h"
7#include "XSUB.h" 5#include "XSUB.h"
8 6
9#include "patchlevel.h" 7#include "patchlevel.h"
10 8
11// threaded perls might need much more, 65536 or more, 9#if USE_VALGRIND
12// which is 0.5 to 1MB 10# include <valgrind/valgrind.h>
13#define STACKSIZE 16384 11#endif
14 12
15#if PERL_VERSION < 6 13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr 23# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr 24# define PL_ppaddr ppaddr
18# endif 25# endif
19# ifndef call_sv 26# ifndef call_sv
20# define call_sv perl_call_sv 27# define call_sv perl_call_sv
… …
31# ifndef IS_PADCONST 38# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 39# define IS_PADCONST(v) 0
33# endif 40# endif
34#endif 41#endif
35 42
36#include <signal.h> 43#include <stdio.h>
44#include <errno.h>
45
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47# undef STACKGUARD
48#endif
49
50#ifndef STACKGUARD
51# define STACKGUARD 0
52#endif
37 53
38#ifdef HAVE_MMAP 54#ifdef HAVE_MMAP
39# include <unistd.h> 55# include <unistd.h>
40# include <sys/mman.h> 56# include <sys/mman.h>
41# ifndef MAP_ANONYMOUS 57# ifndef MAP_ANONYMOUS
… …
43# define MAP_ANONYMOUS MAP_ANON 59# define MAP_ANONYMOUS MAP_ANON
44# else 60# else
45# undef HAVE_MMAP 61# undef HAVE_MMAP
46# endif 62# endif
47# endif 63# endif
64# include <limits.h>
65# ifndef PAGESIZE
66# define PAGESIZE pagesize
67# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
68static long pagesize;
69# else
70# define BOOT_PAGESIZE (void)0
48#endif 71# endif
49 72#else
50#define SUB_INIT "Coro::State::initialize" 73# define PAGESIZE 0
51#define UCORO_STATE "_coro_state" 74# define BOOT_PAGESIZE (void)0
75#endif
52 76
53/* The next macro should declare a variable stacklevel that contains and approximation 77/* The next macro should declare a variable stacklevel that contains and approximation
54 * to the current C stack pointer. Its property is that it changes with each call 78 * to the current C stack pointer. Its property is that it changes with each call
55 * and should be unique. */ 79 * and should be unique. */
80#define dSTACKLEVEL int stacklevel
56#define dSTACKLEVEL void *stacklevel = &stacklevel 81#define STACKLEVEL ((void *)&stacklevel)
57 82
58#define IN_DESTRUCT (PL_main_cv == Nullcv) 83#define IN_DESTRUCT (PL_main_cv == Nullcv)
59 84
60#define labs(l) ((l) >= 0 ? (l) : -(l)) 85#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x)
87#else
88# define attribute(x)
89#endif
90
91#define NOINLINE attribute ((noinline))
61 92
62#include "CoroAPI.h" 93#include "CoroAPI.h"
94
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
63 96
64#ifdef USE_ITHREADS 97#ifdef USE_ITHREADS
65static perl_mutex coro_mutex; 98static perl_mutex coro_mutex;
66# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68#else 101#else
69# define LOCK 0 102# define LOCK (void)0
70# define UNLOCK 0 103# define UNLOCK (void)0
71#endif 104#endif
72 105
73static struct CoroAPI coroapi; 106static struct CoroAPI coroapi;
74static AV *main_mainstack; /* used to differentiate between $main and others */ 107static AV *main_mainstack; /* used to differentiate between $main and others */
75static HV *coro_state_stash; 108static HV *coro_state_stash, *coro_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static SV *coro_mortal; /* will be freed after next transfer */ 109static SV *coro_mortal; /* will be freed after next transfer */
79 110
80/* this is actually not only the c stack but also c registers etc... */ 111static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle;
113
114/* this is a structure representing a c-level coroutine */
81typedef struct { 115typedef struct coro_cctx {
82 int refcnt; /* pointer reference counter */ 116 struct coro_cctx *next;
83 int usecnt; /* shared by how many coroutines */
84 int gencnt; /* generation counter */
85 117
86 coro_context cctx; 118 /* the stack */
87
88 void *sptr; 119 void *sptr;
89 long ssize; /* positive == mmap, otherwise malloc */ 120 long ssize; /* positive == mmap, otherwise malloc */
90} coro_stack;
91 121
122 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
124 JMPENV *top_env;
125 coro_context cctx;
126
127 int inuse;
128
129#if USE_VALGRIND
130 int valgrind_id;
131#endif
132} coro_cctx;
133
134enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */
138};
139
140/* this is a structure representing a perl-level coroutine */
92struct coro { 141struct coro {
93 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 142 /* the c coroutine allocated to this perl coroutine, if any */
94 JMPENV start_env; 143 coro_cctx *cctx;
95 144
96 /* the optional C context */ 145 /* data associated with this coroutine (initial args) */
97 coro_stack *stack; 146 AV *args;
98 void *cursp;
99 int gencnt; 147 int refcnt;
148 int flags;
100 149
101 /* optionally saved, might be zero */ 150 /* optionally saved, might be zero */
102 AV *defav; 151 AV *defav;
103 SV *defsv; 152 SV *defsv;
104 SV *errsv; 153 SV *errsv;
105 154
106 /* saved global state not related to stacks */ 155#define VAR(name,type) type name;
107 U8 dowarn; 156# include "state.h"
108 I32 in_eval; 157#undef VAR
109 158
110 /* the stacks and related info (callchain etc..) */ 159 /* coro process data */
111 PERL_SI *curstackinfo; 160 int prio;
112 AV *curstack;
113 AV *mainstack;
114 SV **stack_sp;
115 OP *op;
116 SV **curpad;
117 AV *comppad;
118 CV *compcv;
119 SV **stack_base;
120 SV **stack_max;
121 SV **tmps_stack;
122 I32 tmps_floor;
123 I32 tmps_ix;
124 I32 tmps_max;
125 I32 *markstack;
126 I32 *markstack_ptr;
127 I32 *markstack_max;
128 I32 *scopestack;
129 I32 scopestack_ix;
130 I32 scopestack_max;
131 ANY *savestack;
132 I32 savestack_ix;
133 I32 savestack_max;
134 OP **retstack;
135 I32 retstack_ix;
136 I32 retstack_max;
137 PMOP *curpm;
138 COP *curcop;
139 JMPENV *top_env;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143}; 161};
144 162
145typedef struct coro *Coro__State; 163typedef struct coro *Coro__State;
146typedef struct coro *Coro__State_or_hashref; 164typedef struct coro *Coro__State_or_hashref;
147 165
148/* mostly copied from op.c:cv_clone2 */ 166static AV *
149STATIC AV * 167coro_clone_padlist (CV *cv)
150clone_padlist (pTHX_ AV *protopadlist)
151{ 168{
152 AV *av; 169 AV *padlist = CvPADLIST (cv);
153 I32 ix;
154 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
155 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
156 SV **pname = AvARRAY (protopad_name);
157 SV **ppad = AvARRAY (protopad);
158 I32 fname = AvFILLp (protopad_name);
159 I32 fpad = AvFILLp (protopad);
160 AV *newpadlist, *newpad_name, *newpad; 170 AV *newpadlist, *newpad;
161 SV **npad;
162
163 newpad_name = newAV ();
164 for (ix = fname; ix >= 0; ix--)
165 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167 newpad = newAV ();
168 av_fill (newpad, AvFILLp (protopad));
169 npad = AvARRAY (newpad);
170 171
171 newpadlist = newAV (); 172 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 173 AvREAL_off (newpadlist);
173 av_store (newpadlist, 0, (SV *) newpad_name); 174#if PERL_VERSION_ATLEAST (5,9,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist);
181
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
174 av_store (newpadlist, 1, (SV *) newpad); 183 av_store (newpadlist, 1, (SV *)newpad);
175
176 av = newAV (); /* will be @_ */
177 av_extend (av, 0);
178 av_store (newpad, 0, (SV *) av);
179 AvFLAGS (av) = AVf_REIFY;
180
181 for (ix = fpad; ix > 0; ix--)
182 {
183 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
185 if (namesv && namesv != &PL_sv_undef)
186 {
187 char *name = SvPVX (namesv); /* XXX */
188
189 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
190 { /* lexical from outside? */
191 npad[ix] = SvREFCNT_inc (ppad[ix]);
192 }
193 else
194 { /* our own lexical */
195 SV *sv;
196 if (*name == '&')
197 sv = SvREFCNT_inc (ppad[ix]);
198 else if (*name == '@')
199 sv = (SV *) newAV ();
200 else if (*name == '%')
201 sv = (SV *) newHV ();
202 else
203 sv = NEWSV (0, 0);
204
205#ifdef SvPADBUSY
206 if (!SvPADBUSY (sv))
207#endif
208 SvPADMY_on (sv);
209
210 npad[ix] = sv;
211 }
212 }
213 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214 {
215 npad[ix] = SvREFCNT_inc (ppad[ix]);
216 }
217 else
218 {
219 SV *sv = NEWSV (0, 0);
220 SvPADTMP_on (sv);
221 npad[ix] = sv;
222 }
223 }
224
225#if 0 /* return -ENOTUNDERSTOOD */
226 /* Now that vars are all in place, clone nested closures. */
227
228 for (ix = fpad; ix > 0; ix--) {
229 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230 if (namesv
231 && namesv != &PL_sv_undef
232 && !(SvFLAGS(namesv) & SVf_FAKE)
233 && *SvPVX(namesv) == '&'
234 && CvCLONE(ppad[ix]))
235 {
236 CV *kid = cv_clone((CV*)ppad[ix]);
237 SvREFCNT_dec(ppad[ix]);
238 CvCLONE_on(kid);
239 SvPADMY_on(kid);
240 npad[ix] = (SV*)kid;
241 }
242 }
243#endif
244 184
245 return newpadlist; 185 return newpadlist;
246} 186}
247 187
248STATIC void 188static void
249free_padlist (pTHX_ AV *padlist) 189free_padlist (AV *padlist)
250{ 190{
251 /* may be during global destruction */ 191 /* may be during global destruction */
252 if (SvREFCNT (padlist)) 192 if (SvREFCNT (padlist))
253 { 193 {
254 I32 i = AvFILLp (padlist); 194 I32 i = AvFILLp (padlist);
… …
267 207
268 SvREFCNT_dec ((SV*)padlist); 208 SvREFCNT_dec ((SV*)padlist);
269 } 209 }
270} 210}
271 211
272STATIC int 212static int
273coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 213coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274{ 214{
275 AV *padlist; 215 AV *padlist;
276 AV *av = (AV *)mg->mg_obj; 216 AV *av = (AV *)mg->mg_obj;
277 217
278 /* casting is fun. */ 218 /* casting is fun. */
279 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280 free_padlist (aTHX_ padlist); 220 free_padlist (padlist);
281 221
282 SvREFCNT_dec (av); 222 SvREFCNT_dec (av);
223
224 return 0;
283} 225}
284 226
285#define PERL_MAGIC_coro PERL_MAGIC_ext 227#define PERL_MAGIC_coro PERL_MAGIC_ext
286 228
287static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
288 230
231#define CORO_MAGIC(cv) \
232 SvMAGIC (cv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234 ? SvMAGIC (cv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
236 : 0
237
289/* the next two functions merely cache the padlists */ 238/* the next two functions merely cache the padlists */
290STATIC void 239static void
291get_padlist (pTHX_ CV *cv) 240get_padlist (CV *cv)
292{ 241{
293 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 242 MAGIC *mg = CORO_MAGIC (cv);
243 AV *av;
294 244
295 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
296 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
297 else 247 else
248 {
249#if 0
250 /* this is probably cleaner, but also slower? */
251 CV *cp = Perl_cv_clone (cv);
252 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp);
255#else
298 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 256 CvPADLIST (cv) = coro_clone_padlist (cv);
257#endif
258 }
299} 259}
300 260
301STATIC void 261static void
302put_padlist (pTHX_ CV *cv) 262put_padlist (CV *cv)
303{ 263{
304 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 264 MAGIC *mg = CORO_MAGIC (cv);
265 AV *av;
305 266
306 if (!mg) 267 if (!mg)
307 { 268 {
308 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310 mg->mg_virtual = &vtbl_coro; 271 mg->mg_virtual = &vtbl_coro;
311 mg->mg_obj = (SV *)newAV (); 272 mg->mg_obj = (SV *)newAV ();
312 } 273 }
313 274
314 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 275 av = (AV *)mg->mg_obj;
276
277 if (AvFILLp (av) >= AvMAX (av))
278 av_extend (av, AvMAX (av) + 1);
279
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
315} 281}
316 282
317#define SB do { 283#define SB do {
318#define SE } while (0) 284#define SE } while (0)
319 285
320#define LOAD(state) load_state(aTHX_ (state)); 286#define LOAD(state) load_state ((state))
321#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 287#define SAVE(state,flags) save_state ((state),(flags))
322 288
323#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
324 290
325static void 291static void
326load_state(pTHX_ Coro__State c) 292load_state (Coro__State c)
327{ 293{
328 PL_dowarn = c->dowarn; 294#define VAR(name,type) PL_ ## name = c->name;
329 PL_in_eval = c->in_eval; 295# include "state.h"
330 296#undef VAR
331 PL_curstackinfo = c->curstackinfo;
332 PL_curstack = c->curstack;
333 PL_mainstack = c->mainstack;
334 PL_stack_sp = c->stack_sp;
335 PL_op = c->op;
336 PL_curpad = c->curpad;
337 PL_comppad = c->comppad;
338 PL_compcv = c->compcv;
339 PL_stack_base = c->stack_base;
340 PL_stack_max = c->stack_max;
341 PL_tmps_stack = c->tmps_stack;
342 PL_tmps_floor = c->tmps_floor;
343 PL_tmps_ix = c->tmps_ix;
344 PL_tmps_max = c->tmps_max;
345 PL_markstack = c->markstack;
346 PL_markstack_ptr = c->markstack_ptr;
347 PL_markstack_max = c->markstack_max;
348 PL_scopestack = c->scopestack;
349 PL_scopestack_ix = c->scopestack_ix;
350 PL_scopestack_max = c->scopestack_max;
351 PL_savestack = c->savestack;
352 PL_savestack_ix = c->savestack_ix;
353 PL_savestack_max = c->savestack_max;
354 PL_retstack = c->retstack;
355 PL_retstack_ix = c->retstack_ix;
356 PL_retstack_max = c->retstack_max;
357 PL_curpm = c->curpm;
358 PL_curcop = c->curcop;
359 PL_top_env = c->top_env;
360 297
361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
364 301
… …
367 CV *cv; 304 CV *cv;
368 305
369 /* now do the ugly restore mess */ 306 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 307 while ((cv = (CV *)POPs))
371 { 308 {
372 AV *padlist = (AV *)POPs;
373
374 if (padlist)
375 {
376 put_padlist (aTHX_ cv); /* mark this padlist as available */ 309 put_padlist (cv); /* mark this padlist as available */
377 CvPADLIST(cv) = padlist; 310 CvDEPTH (cv) = PTR2IV (POPs);
378 } 311 CvPADLIST (cv) = (AV *)POPs;
379
380 ++CvDEPTH(cv);
381 } 312 }
382 313
383 PUTBACK; 314 PUTBACK;
384 } 315 }
385} 316}
386 317
387static void 318static void
388save_state(pTHX_ Coro__State c, int flags) 319save_state (Coro__State c, int flags)
389{ 320{
390 { 321 {
391 dSP; 322 dSP;
392 I32 cxix = cxstack_ix; 323 I32 cxix = cxstack_ix;
393 PERL_CONTEXT *ccstk = cxstack; 324 PERL_CONTEXT *ccstk = cxstack;
… …
404 { 335 {
405 while (cxix >= 0) 336 while (cxix >= 0)
406 { 337 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 338 PERL_CONTEXT *cx = &ccstk[cxix--];
408 339
409 if (CxTYPE(cx) == CXt_SUB) 340 if (CxTYPE (cx) == CXt_SUB)
410 { 341 {
411 CV *cv = cx->blk_sub.cv; 342 CV *cv = cx->blk_sub.cv;
343
412 if (CvDEPTH(cv)) 344 if (CvDEPTH (cv))
413 { 345 {
414 EXTEND (SP, CvDEPTH(cv)*2); 346 EXTEND (SP, 3);
415 347
416 while (--CvDEPTH(cv))
417 {
418 /* this tells the restore code to increment CvDEPTH */
419 PUSHs (Nullsv);
420 PUSHs ((SV *)cv);
421 }
422
423 PUSHs ((SV *)CvPADLIST(cv)); 348 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424 PUSHs ((SV *)cv); 350 PUSHs ((SV *)cv);
425 351
426 get_padlist (aTHX_ cv); /* this is a monster */ 352 CvDEPTH (cv) = 0;
353 get_padlist (cv);
427 } 354 }
428 } 355 }
429#ifdef CXt_FORMAT 356#ifdef CXt_FORMAT
430 else if (CxTYPE(cx) == CXt_FORMAT) 357 else if (CxTYPE (cx) == CXt_FORMAT)
431 { 358 {
432 /* I never used formats, so how should I know how these are implemented? */ 359 /* I never used formats, so how should I know how these are implemented? */
433 /* my bold guess is as a simple, plain sub... */ 360 /* my bold guess is as a simple, plain sub... */
434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435 } 362 }
… …
449 376
450 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
451 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
452 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
453 380
454 c->dowarn = PL_dowarn; 381#define VAR(name,type)c->name = PL_ ## name;
455 c->in_eval = PL_in_eval; 382# include "state.h"
456 383#undef VAR
457 c->curstackinfo = PL_curstackinfo;
458 c->curstack = PL_curstack;
459 c->mainstack = PL_mainstack;
460 c->stack_sp = PL_stack_sp;
461 c->op = PL_op;
462 c->curpad = PL_curpad;
463 c->comppad = PL_comppad;
464 c->compcv = PL_compcv;
465 c->stack_base = PL_stack_base;
466 c->stack_max = PL_stack_max;
467 c->tmps_stack = PL_tmps_stack;
468 c->tmps_floor = PL_tmps_floor;
469 c->tmps_ix = PL_tmps_ix;
470 c->tmps_max = PL_tmps_max;
471 c->markstack = PL_markstack;
472 c->markstack_ptr = PL_markstack_ptr;
473 c->markstack_max = PL_markstack_max;
474 c->scopestack = PL_scopestack;
475 c->scopestack_ix = PL_scopestack_ix;
476 c->scopestack_max = PL_scopestack_max;
477 c->savestack = PL_savestack;
478 c->savestack_ix = PL_savestack_ix;
479 c->savestack_max = PL_savestack_max;
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483 c->curpm = PL_curpm;
484 c->curcop = PL_curcop;
485 c->top_env = PL_top_env;
486} 384}
487 385
488/* 386/*
489 * allocate various perl stacks. This is an exact copy 387 * allocate various perl stacks. This is an exact copy
490 * of perl.c:init_stacks, except that it uses less memory 388 * of perl.c:init_stacks, except that it uses less memory
491 * on the (sometimes correct) assumption that coroutines do 389 * on the (sometimes correct) assumption that coroutines do
492 * not usually need a lot of stackspace. 390 * not usually need a lot of stackspace.
493 */ 391 */
494STATIC void 392static void
495coro_init_stacks (pTHX) 393coro_init_stacks ()
496{ 394{
497 LOCK;
498
499 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
500 PL_curstackinfo->si_type = PERLSI_MAIN; 396 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 397 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 399
504 PL_stack_base = AvARRAY(PL_curstack); 400 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 401 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 403
508 New(50,PL_tmps_stack,96,SV*); 404 New(50,PL_tmps_stack,128,SV*);
509 PL_tmps_floor = -1; 405 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 406 PL_tmps_ix = -1;
511 PL_tmps_max = 96; 407 PL_tmps_max = 128;
512 408
513 New(54,PL_markstack,16,I32); 409 New(54,PL_markstack,32,I32);
514 PL_markstack_ptr = PL_markstack; 410 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 411 PL_markstack_max = PL_markstack + 32;
516 412
517#ifdef SET_MARK_OFFSET 413#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 414 SET_MARK_OFFSET;
519#endif 415#endif
520 416
521 New(54,PL_scopestack,16,I32); 417 New(54,PL_scopestack,32,I32);
522 PL_scopestack_ix = 0; 418 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 419 PL_scopestack_max = 32;
524 420
525 New(54,PL_savestack,96,ANY); 421 New(54,PL_savestack,64,ANY);
526 PL_savestack_ix = 0; 422 PL_savestack_ix = 0;
527 PL_savestack_max = 96; 423 PL_savestack_max = 64;
528 424
425#if !PERL_VERSION_ATLEAST (5,9,0)
529 New(54,PL_retstack,8,OP*); 426 New(54,PL_retstack,16,OP*);
530 PL_retstack_ix = 0; 427 PL_retstack_ix = 0;
531 PL_retstack_max = 8; 428 PL_retstack_max = 16;
532 429#endif
533 UNLOCK;
534} 430}
535 431
536/* 432/*
537 * destroy the stacks, the callchain etc... 433 * destroy the stacks, the callchain etc...
538 */ 434 */
539STATIC void 435static void
540destroy_stacks(pTHX) 436coro_destroy_stacks ()
541{ 437{
542 if (!IN_DESTRUCT) 438 if (!IN_DESTRUCT)
543 { 439 {
544 /* is this ugly, I ask? */ 440 /* is this ugly, I ask? */
545 LEAVE_SCOPE (0); 441 LEAVE_SCOPE (0);
… …
576 472
577 Safefree (PL_tmps_stack); 473 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 474 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 475 Safefree (PL_scopestack);
580 Safefree (PL_savestack); 476 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0)
581 Safefree (PL_retstack); 478 Safefree (PL_retstack);
582}
583
584static void
585allocate_stack (Coro__State ctx, int alloc)
586{
587 coro_stack *stack;
588
589 New (0, stack, 1, coro_stack);
590
591 stack->refcnt = 1;
592 stack->usecnt = 1;
593 stack->gencnt = ctx->gencnt = 0;
594
595 if (alloc)
596 {
597#if HAVE_MMAP
598 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600 if (stack->sptr == (void *)-1)
601#endif 479#endif
602 {
603 /*FIXME*//*D*//* reasonable stack size! */
604 stack->ssize = - (STACKSIZE * sizeof (long));
605 New (0, stack->sptr, STACKSIZE, long);
606 }
607 }
608 else
609 stack->sptr = 0;
610
611 ctx->stack = stack;
612} 480}
613 481
614static void 482static void
615deallocate_stack (Coro__State ctx) 483setup_coro (struct coro *coro)
616{
617 coro_stack *stack = ctx->stack;
618
619 ctx->stack = 0;
620
621 if (stack)
622 {
623 if (!--stack->refcnt)
624 {
625#ifdef HAVE_MMAP
626 if (stack->ssize > 0 && stack->sptr)
627 munmap (stack->sptr, stack->ssize);
628 else
629#endif
630 Safefree (stack->sptr);
631
632 Safefree (stack);
633 }
634 else if (ctx->gencnt == stack->gencnt)
635 --stack->usecnt;
636 }
637}
638
639static void
640setup_coro (void *arg)
641{ 484{
642 /* 485 /*
643 * emulate part of the perl startup here. 486 * emulate part of the perl startup here.
644 */ 487 */
645 dTHX;
646 dSP;
647 Coro__State ctx = (Coro__State)arg;
648 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649 488
650 coro_init_stacks (aTHX); 489 coro_init_stacks ();
651 /*PL_curcop = 0;*/ 490
652 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 491 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL;
493 PL_curpm = 0;
494 PL_localizing = 0;
495 PL_dirty = 0;
496 PL_restartop = 0;
497
498 {
499 dSP;
500 LOGOP myop;
501
502 /* I have no idea why this is needed, but it is */
503 PUSHMARK (SP);
504
653 SvREFCNT_dec (GvAV (PL_defgv)); 505 SvREFCNT_dec (GvAV (PL_defgv));
654 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 506 GvAV (PL_defgv) = coro->args; coro->args = 0;
655 507
656 SPAGAIN;
657
658 if (ctx->stack)
659 {
660 ctx->cursp = 0;
661
662 PUSHMARK(SP);
663 PUTBACK;
664 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
665
666 if (SvTRUE (ERRSV))
667 croak (NULL);
668 else
669 croak ("FATAL: CCTXT coroutine returned!");
670 }
671 else
672 {
673 UNOP myop;
674
675 PL_op = (OP *)&myop;
676
677 Zero(&myop, 1, UNOP); 508 Zero (&myop, 1, LOGOP);
678 myop.op_next = Nullop; 509 myop.op_next = Nullop;
679 myop.op_flags = OPf_WANT_VOID; 510 myop.op_flags = OPf_WANT_VOID;
680 511
512 PL_op = (OP *)&myop;
513
681 PUSHMARK(SP); 514 PUSHMARK (SP);
682 XPUSHs (sub_init); 515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
683 /*
684 * the next line is slightly wrong, as PL_op->op_next
685 * is actually being executed so we skip the first op.
686 * that doesn't matter, though, since it is only
687 * pp_nextstate and we never return...
688 * ah yes, and I don't care anyways ;)
689 */
690 PUTBACK; 516 PUTBACK;
691 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692 SPAGAIN; 518 SPAGAIN;
519 }
693 520
694 ENTER; /* necessary e.g. for dounwind */ 521 ENTER; /* necessary e.g. for dounwind */
695 }
696} 522}
697 523
698static void 524static void
699continue_coro (void *arg) 525free_coro_mortal ()
700{ 526{
701 /*
702 * this is a _very_ stripped down perl interpreter ;)
703 */
704 dTHX;
705 Coro__State ctx = (Coro__State)arg;
706 JMPENV coro_start_env;
707
708 PL_top_env = &ctx->start_env;
709
710 ctx->cursp = 0;
711 PL_op = PL_op->op_next;
712 CALLRUNOPS(aTHX);
713
714 abort ();
715}
716
717STATIC void
718transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
719{
720 dSTACKLEVEL;
721
722 if (prev != next)
723 {
724 if (next->mainstack)
725 {
726 LOCK;
727 SAVE (prev, flags);
728 LOAD (next);
729 UNLOCK;
730
731 /* mark this state as in-use */
732 next->mainstack = 0;
733 next->tmps_ix = -2;
734
735 /* stacklevel changed? if yes, grab the stack for us! */
736 if (flags & TRANSFER_SAVE_CCTXT)
737 {
738 if (!prev->stack)
739 allocate_stack (prev, 0);
740 else if (prev->cursp != stacklevel
741 && prev->stack->usecnt > 1)
742 {
743 prev->gencnt = ++prev->stack->gencnt;
744 prev->stack->usecnt = 1;
745 }
746
747 /* has our stack been invalidated? */
748 if (next->stack && next->stack->gencnt != next->gencnt)
749 {
750 deallocate_stack (next);
751 allocate_stack (next, 1);
752 coro_create (&(next->stack->cctx),
753 continue_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 }
756
757 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758 prev->cursp = stacklevel;
759 /* don't add any code here */
760 }
761 else
762 next->cursp = stacklevel;
763 }
764 else if (next->tmps_ix == -2)
765 croak ("tried to transfer to running coroutine");
766 else
767 {
768 LOCK;
769 SAVE (prev, -1); /* first get rid of the old state */
770 UNLOCK;
771
772 if (flags & TRANSFER_SAVE_CCTXT)
773 {
774 if (!prev->stack)
775 allocate_stack (prev, 0);
776
777 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778 {
779 PL_top_env = &next->start_env;
780
781 setup_coro (next);
782 next->cursp = stacklevel;
783
784 prev->stack->refcnt++;
785 prev->stack->usecnt++;
786 next->stack = prev->stack;
787 next->gencnt = prev->gencnt;
788 }
789 else
790 {
791 assert (!next->stack);
792 allocate_stack (next, 1);
793 coro_create (&(next->stack->cctx),
794 setup_coro, (void *)next,
795 next->stack->sptr, labs (next->stack->ssize));
796 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797 prev->cursp = stacklevel;
798 /* don't add any code here */
799 }
800 }
801 else
802 {
803 setup_coro (next);
804 next->cursp = stacklevel;
805 }
806 }
807 }
808
809 LOCK;
810 if (coro_mortal) 527 if (coro_mortal)
811 { 528 {
812 SvREFCNT_dec (coro_mortal); 529 SvREFCNT_dec (coro_mortal);
813 coro_mortal = 0; 530 coro_mortal = 0;
814 } 531 }
532}
533
534static void NOINLINE
535prepare_cctx (coro_cctx *cctx)
536{
537 dSP;
538 LOGOP myop;
539
540 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545
546 PUSHMARK (SP);
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN;
551}
552
553static void
554coro_run (void *arg)
555{
556 /* coro_run is the alternative epilogue of transfer() */
815 UNLOCK; 557 UNLOCK;
816}
817 558
818#define SV_CORO(sv,func) \ 559 /*
819 do { \ 560 * this is a _very_ stripped down perl interpreter ;)
820 if (SvROK (sv)) \ 561 */
821 sv = SvRV (sv); \ 562 PL_top_env = &PL_start_env;
822 \
823 if (SvTYPE (sv) == SVt_PVHV) \
824 { \
825 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826 \
827 if (!he) \
828 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829 \
830 (sv) = SvRV (HeVAL(he)); \
831 } \
832 \
833 /* must also be changed inside Coro::Cont::yield */ \
834 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836 \
837 } while(0)
838 563
839#define SvSTATE(sv) (struct coro *)SvIV (sv) 564 /* inject call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg);
840 566
567 /* somebody will hit me for both perl_run and PL_restartop */
568 perl_run (PL_curinterp);
569
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571 abort ();
572}
573
574static coro_cctx *
575cctx_new ()
576{
577 coro_cctx *cctx;
578
579 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx);
582
583#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588
589 if (cctx->sptr == (void *)-1)
590 {
591 perror ("FATAL: unable to mmap stack for coroutine");
592 _exit (EXIT_FAILURE);
593 }
594
595# if STACKGUARD
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
597# endif
598
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 {
606 perror ("FATAL: unable to malloc stack for coroutine");
607 _exit (EXIT_FAILURE);
608 }
609
610#endif
611
612#if USE_VALGRIND
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620
621 return cctx;
622}
623
624static void
625cctx_destroy (coro_cctx *cctx)
626{
627 if (!cctx)
628 return;
629
630 --cctx_count;
631
632#if USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif
635
636#if HAVE_MMAP
637 munmap (cctx->sptr, cctx->ssize);
638#else
639 Safefree (cctx->sptr);
640#endif
641
642 Safefree (cctx);
643}
644
645static coro_cctx *
646cctx_get ()
647{
648 coro_cctx *cctx;
649
650 if (cctx_first)
651 {
652 cctx = cctx_first;
653 cctx_first = cctx->next;
654 --cctx_idle;
655 }
656 else
657 {
658 cctx = cctx_new ();
659 PL_op = PL_op->op_next;
660 }
661
662 return cctx;
663}
664
665static void
666cctx_put (coro_cctx *cctx)
667{
668 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX)
670 {
671 coro_cctx *first = cctx_first;
672 cctx_first = first->next;
673 --cctx_idle;
674
675 assert (!first->inuse);
676 cctx_destroy (first);
677 }
678
679 ++cctx_idle;
680 cctx->next = cctx_first;
681 cctx_first = cctx;
682}
683
684/* never call directly, always through the coro_state_transfer global variable */
685static void NOINLINE
686transfer (struct coro *prev, struct coro *next, int flags)
687{
688 dSTACKLEVEL;
689
690 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL)
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
693 else if (prev != next)
694 {
695 coro_cctx *prev__cctx;
696
697 if (prev->flags & CF_NEW)
698 {
699 /* create a new empty context */
700 Newz (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING;
704 }
705
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING;
715
716 LOCK;
717
718 if (next->mainstack)
719 {
720 /* coroutine already started */
721 SAVE (prev, flags);
722 LOAD (next);
723 }
724 else
725 {
726 /* need to start coroutine */
727 assert (next->flags & CF_NEW);
728 next->flags &= ~CF_NEW;
729 /* first get rid of the old state */
730 SAVE (prev, -1);
731 /* setup coroutine call */
732 setup_coro (next);
733 /* need a new stack */
734 assert (!next->stack);
735 }
736
737 prev__cctx = prev->cctx;
738
739 /* possibly "free" the cctx */
740 if (prev__cctx->idle_sp == STACKLEVEL && 0)
741 {
742 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743 assert (PL_top_env == prev__cctx->top_env);
744
745 prev->cctx = 0;
746
747 cctx_put (prev__cctx);
748 prev__cctx->inuse = 0;
749 }
750
751 if (!next->cctx)
752 {
753 next->cctx = cctx_get ();
754 assert (!next->cctx->inuse);
755 next->cctx->inuse = 1;
756 }
757
758 if (prev__cctx != next->cctx)
759 {
760 prev__cctx->top_env = PL_top_env;
761 PL_top_env = next->cctx->top_env;
762 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763 }
764
765 free_coro_mortal ();
766
767 UNLOCK;
768 }
769}
770
771struct transfer_args
772{
773 struct coro *prev, *next;
774 int flags;
775};
776
777#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
778
779static void
780coro_state_destroy (struct coro *coro)
781{
782 if (coro->refcnt--)
783 return;
784
785 if (coro->mainstack && coro->mainstack != main_mainstack)
786 {
787 struct coro temp;
788
789 if (coro->flags & CF_RUNNING)
790 croak ("FATAL: tried to destroy currently running coroutine");
791
792 SAVE ((&temp), TRANSFER_SAVE_ALL);
793 LOAD (coro);
794
795 coro_destroy_stacks ();
796
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */
798
799 coro->mainstack = 0;
800 }
801
802 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args);
804 Safefree (coro);
805}
806
841static void 807static int
808coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
809{
810 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0;
812
813 coro_state_destroy (coro);
814
815 return 0;
816}
817
818static int
819coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820{
821 struct coro *coro = (struct coro *)mg->mg_ptr;
822
823 ++coro->refcnt;
824
825 return 0;
826}
827
828static MGVTBL coro_state_vtbl = {
829 0, 0, 0, 0,
830 coro_state_clear,
831 0,
832#ifdef MGf_DUP
833 coro_state_dup,
834#else
835# define MGf_DUP 0
836#endif
837};
838
839static struct coro *
840SvSTATE (SV *coro)
841{
842 HV *stash;
843 MAGIC *mg;
844
845 if (SvROK (coro))
846 coro = SvRV (coro);
847
848 stash = SvSTASH (coro);
849 if (stash != coro_stash && stash != coro_state_stash)
850 {
851 /* very slow, but rare, check */
852 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853 croak ("Coro::State object required");
854 }
855
856 mg = SvMAGIC (coro);
857 assert (mg->mg_type == PERL_MAGIC_ext);
858 return (struct coro *)mg->mg_ptr;
859}
860
861static void
862prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
863{
864 ta->prev = SvSTATE (prev);
865 ta->next = SvSTATE (next);
866 ta->flags = flags;
867}
868
869static void
842api_transfer(pTHX_ SV *prev, SV *next, int flags) 870api_transfer (SV *prev, SV *next, int flags)
843{ 871{
844 SV_CORO (prev, "Coro::transfer"); 872 struct transfer_args ta;
845 SV_CORO (next, "Coro::transfer");
846 873
847 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 874 prepare_transfer (&ta, prev, next, flags);
875 TRANSFER (ta);
848} 876}
849 877
850/** Coro ********************************************************************/ 878/** Coro ********************************************************************/
851 879
852#define PRIO_MAX 3 880#define PRIO_MAX 3
… …
855#define PRIO_LOW -1 883#define PRIO_LOW -1
856#define PRIO_IDLE -3 884#define PRIO_IDLE -3
857#define PRIO_MIN -4 885#define PRIO_MIN -4
858 886
859/* for Coro.pm */ 887/* for Coro.pm */
860static GV *coro_current, *coro_idle; 888static SV *coro_current;
861static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 889static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862static int coro_nready; 890static int coro_nready;
863 891
864static void 892static void
865coro_enq (pTHX_ SV *sv) 893coro_enq (SV *coro_sv)
866{ 894{
867 if (SvTYPE (sv) == SVt_PVHV)
868 {
869 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
870 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
871
872 prio = prio > PRIO_MAX ? PRIO_MAX
873 : prio < PRIO_MIN ? PRIO_MIN
874 : prio;
875
876 av_push (coro_ready [prio - PRIO_MIN], sv); 895 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
877 coro_nready++; 896 coro_nready++;
878
879 return;
880 }
881
882 croak ("Coro::ready tried to enqueue something that is not a coroutine");
883} 897}
884 898
885static SV * 899static SV *
886coro_deq (pTHX_ int min_prio) 900coro_deq (int min_prio)
887{ 901{
888 int prio = PRIO_MAX - PRIO_MIN; 902 int prio = PRIO_MAX - PRIO_MIN;
889 903
890 min_prio -= PRIO_MIN; 904 min_prio -= PRIO_MIN;
891 if (min_prio < 0) 905 if (min_prio < 0)
892 min_prio = 0; 906 min_prio = 0;
893 907
894 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
895 if (av_len (coro_ready[prio]) >= 0) 909 if (AvFILLp (coro_ready [prio]) >= 0)
896 { 910 {
897 coro_nready--; 911 coro_nready--;
898 return av_shift (coro_ready[prio]); 912 return av_shift (coro_ready [prio]);
899 } 913 }
900 914
901 return 0; 915 return 0;
902} 916}
903 917
904static void 918static int
905api_ready (SV *coro) 919api_ready (SV *coro_sv)
906{ 920{
907 dTHX; 921 struct coro *coro;
908 922
909 if (SvROK (coro)) 923 if (SvROK (coro_sv))
910 coro = SvRV (coro); 924 coro_sv = SvRV (coro_sv);
925
926 coro = SvSTATE (coro_sv);
927
928 if (coro->flags & CF_READY)
929 return 0;
930
931#if 0 /* this is actually harmless */
932 if (coro->flags & CF_RUNNING)
933 croak ("Coro::ready called on currently running coroutine");
934#endif
935
936 coro->flags |= CF_READY;
911 937
912 LOCK; 938 LOCK;
913 coro_enq (aTHX_ SvREFCNT_inc (coro)); 939 coro_enq (SvREFCNT_inc (coro_sv));
914 UNLOCK; 940 UNLOCK;
941
942 return 1;
943}
944
945static int
946api_is_ready (SV *coro_sv)
947{
948 return !!SvSTATE (coro_sv)->flags & CF_READY;
949}
950
951static void
952prepare_schedule (struct transfer_args *ta)
953{
954 SV *prev, *next;
955
956 for (;;)
957 {
958 LOCK;
959 next = coro_deq (PRIO_MIN);
960 UNLOCK;
961
962 if (next)
963 break;
964
965 {
966 dSP;
967
968 ENTER;
969 SAVETMPS;
970
971 PUSHMARK (SP);
972 PUTBACK;
973 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975 FREETMPS;
976 LEAVE;
977 }
978 }
979
980 prev = SvRV (coro_current);
981 SvRV_set (coro_current, next);
982
983 /* free this only after the transfer */
984 LOCK;
985 free_coro_mortal ();
986 UNLOCK;
987 coro_mortal = prev;
988
989 assert (!SvROK(prev));//D
990 assert (!SvROK(next));//D
991
992 ta->prev = SvSTATE (prev);
993 ta->next = SvSTATE (next);
994 ta->flags = TRANSFER_SAVE_ALL;
995
996 assert (ta->flags & CF_READY);
997 ta->next->flags &= ~CF_READY;
998}
999
1000static void
1001prepare_cede (struct transfer_args *ta)
1002{
1003 api_ready (coro_current);
1004
1005 prepare_schedule (ta);
915} 1006}
916 1007
917static void 1008static void
918api_schedule (void) 1009api_schedule (void)
919{ 1010{
920 dTHX; 1011 struct transfer_args ta;
921 1012
922 SV *prev, *next; 1013 prepare_schedule (&ta);
923 1014 TRANSFER (ta);
924 LOCK;
925
926 prev = SvRV (GvSV (coro_current));
927 next = coro_deq (aTHX_ PRIO_MIN);
928
929 if (!next)
930 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
931
932 /* free this only after the transfer */
933 coro_mortal = prev;
934 SV_CORO (prev, "Coro::schedule");
935
936 SvRV (GvSV (coro_current)) = next;
937
938 SV_CORO (next, "Coro::schedule");
939
940 UNLOCK;
941
942 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
943 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
944} 1015}
945 1016
946static void 1017static void
947api_cede (void) 1018api_cede (void)
948{ 1019{
949 dTHX; 1020 struct transfer_args ta;
950 1021
951 LOCK; 1022 prepare_cede (&ta);
952 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1023 TRANSFER (ta);
953 UNLOCK;
954
955 api_schedule ();
956} 1024}
957 1025
958MODULE = Coro::State PACKAGE = Coro::State 1026MODULE = Coro::State PACKAGE = Coro::State
959 1027
960PROTOTYPES: ENABLE 1028PROTOTYPES: DISABLE
961 1029
962BOOT: 1030BOOT:
963{ /* {} necessary for stoopid perl-5.6.x */ 1031{
964#ifdef USE_ITHREADS 1032#ifdef USE_ITHREADS
965 MUTEX_INIT (&coro_mutex); 1033 MUTEX_INIT (&coro_mutex);
966#endif 1034#endif
1035 BOOT_PAGESIZE;
967 1036
968 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
969 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
970 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1037 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971 1038
972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1039 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1040 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1041 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
975 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
976 1042
977 main_mainstack = PL_mainstack; 1043 main_mainstack = PL_mainstack;
978 1044
979 coroapi.ver = CORO_API_VERSION; 1045 coroapi.ver = CORO_API_VERSION;
980 coroapi.transfer = api_transfer; 1046 coroapi.transfer = api_transfer;
981}
982 1047
983Coro::State 1048 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
984_newprocess(args) 1049}
985 SV * args 1050
986 PROTOTYPE: $ 1051SV *
1052new (char *klass, ...)
987 CODE: 1053 CODE:
988 Coro__State coro; 1054{
1055 struct coro *coro;
1056 HV *hv;
1057 int i;
989 1058
990 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991 croak ("Coro::State::_newprocess expects an arrayref");
992
993 Newz (0, coro, 1, struct coro); 1059 Newz (0, coro, 1, struct coro);
1060 coro->args = newAV ();
1061 coro->flags = CF_NEW;
994 1062
995 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1063 hv = newHV ();
996 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1064 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
997 /*coro->stack = 0;*/ 1065 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
998 1066
999 /* same as JMPENV_BOOTSTRAP */ 1067 for (i = 1; i < items; i++)
1000 /* we might be able to recycle start_env, but safe is safe */ 1068 av_push (coro->args, newSVsv (ST (i)));
1001 /*Zero(&coro->start_env, 1, JMPENV);*/ 1069}
1002 coro->start_env.je_ret = -1;
1003 coro->start_env.je_mustcatch = TRUE;
1004
1005 RETVAL = coro;
1006 OUTPUT: 1070 OUTPUT:
1007 RETVAL 1071 RETVAL
1008 1072
1009void 1073void
1010transfer(prev, next, flags) 1074_set_stacklevel (...)
1011 SV *prev 1075 ALIAS:
1012 SV *next 1076 Coro::State::transfer = 1
1013 int flags 1077 Coro::schedule = 2
1014 PROTOTYPE: @ 1078 Coro::cede = 3
1079 Coro::Cont::yield = 4
1015 CODE: 1080 CODE:
1016 PUTBACK; 1081{
1017 SV_CORO (next, "Coro::transfer"); 1082 struct transfer_args ta;
1018 SV_CORO (prev, "Coro::transfer"); 1083
1019 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1084 switch (ix)
1020 SPAGAIN; 1085 {
1086 case 0:
1087 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088 ta.next = 0;
1089 ta.flags = TRANSFER_SET_STACKLEVEL;
1090 break;
1091
1092 case 1:
1093 if (items != 3)
1094 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1095
1096 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1097 break;
1098
1099 case 2:
1100 prepare_schedule (&ta);
1101 break;
1102
1103 case 3:
1104 prepare_cede (&ta);
1105 break;
1106
1107 case 4:
1108 {
1109 SV *yieldstack;
1110 SV *sv;
1111 AV *defav = GvAV (PL_defgv);
1112
1113 yieldstack = *hv_fetch (
1114 (HV *)SvRV (coro_current),
1115 "yieldstack", sizeof ("yieldstack") - 1,
1116 0
1117 );
1118
1119 /* set up @_ -- ugly */
1120 av_clear (defav);
1121 av_fill (defav, items - 1);
1122 while (items--)
1123 av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125 sv = av_pop ((AV *)SvRV (yieldstack));
1126 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128 ta.flags = 0;
1129 SvREFCNT_dec (sv);
1130 }
1131 break;
1132
1133 }
1134
1135 TRANSFER (ta);
1136}
1021 1137
1022void 1138void
1023DESTROY(coro) 1139_clone_state_from (SV *dst, SV *src)
1024 Coro::State coro 1140 CODE:
1025 CODE: 1141{
1142 struct coro *coro_src = SvSTATE (src);
1026 1143
1027 if (coro->mainstack && coro->mainstack != main_mainstack) 1144 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028 {
1029 struct coro temp;
1030 1145
1031 PUTBACK; 1146 ++coro_src->refcnt;
1032 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1147 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1033 LOAD (aTHX_ coro); 1148}
1034 SPAGAIN;
1035
1036 destroy_stacks (aTHX);
1037
1038 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039 SPAGAIN;
1040
1041 coro->mainstack = 0;
1042 }
1043
1044 deallocate_stack (coro);
1045 SvREFCNT_dec (coro->args);
1046 Safefree (coro);
1047 1149
1048void 1150void
1049_exit(code) 1151_exit (code)
1050 int code 1152 int code
1051 PROTOTYPE: $ 1153 PROTOTYPE: $
1052 CODE: 1154 CODE:
1053 _exit (code); 1155 _exit (code);
1054 1156
1055MODULE = Coro::State PACKAGE = Coro::Cont 1157int
1158cctx_count ()
1159 CODE:
1160 RETVAL = cctx_count;
1161 OUTPUT:
1162 RETVAL
1056 1163
1057# this is slightly dirty (should expose a c-level api) 1164int
1058 1165cctx_idle ()
1059void 1166 CODE:
1060yield(...) 1167 RETVAL = cctx_idle;
1061 PROTOTYPE: @ 1168 OUTPUT:
1062 CODE: 1169 RETVAL
1063 SV *yieldstack;
1064 SV *sv;
1065 AV *defav = GvAV (PL_defgv);
1066 struct coro *prev, *next;
1067
1068 yieldstack = *hv_fetch (
1069 (HV *)SvRV (GvSV (coro_current)),
1070 "yieldstack", sizeof ("yieldstack") - 1,
1071 0
1072 );
1073
1074 /* set up @_ -- ugly */
1075 av_clear (defav);
1076 av_fill (defav, items - 1);
1077 while (items--)
1078 av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080 sv = av_pop ((AV *)SvRV (yieldstack));
1081 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083 SvREFCNT_dec (sv);
1084
1085 transfer (aTHX_ prev, next, 0);
1086 1170
1087MODULE = Coro::State PACKAGE = Coro 1171MODULE = Coro::State PACKAGE = Coro
1088 1172
1089# this is slightly dirty (should expose a c-level api)
1090
1091BOOT: 1173BOOT:
1092{ 1174{
1093 int i; 1175 int i;
1176
1094 HV *stash = gv_stashpv ("Coro", TRUE); 1177 coro_stash = gv_stashpv ("Coro", TRUE);
1095 1178
1096 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102 1185
1103 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1186 coro_current = get_sv ("Coro::current", FALSE);
1104 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1187 SvREADONLY_on (coro_current);
1105 1188
1106 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107 coro_ready[i] = newAV (); 1190 coro_ready[i] = newAV ();
1108 1191
1109 { 1192 {
1110 SV *sv = perl_get_sv("Coro::API", 1); 1193 SV *sv = perl_get_sv("Coro::API", 1);
1111 1194
1112 coroapi.schedule = api_schedule; 1195 coroapi.schedule = api_schedule;
1113 coroapi.cede = api_cede; 1196 coroapi.cede = api_cede;
1114 coroapi.ready = api_ready; 1197 coroapi.ready = api_ready;
1198 coroapi.is_ready = api_is_ready;
1115 coroapi.nready = &coro_nready; 1199 coroapi.nready = &coro_nready;
1116 coroapi.current = coro_current; 1200 coroapi.current = coro_current;
1117 1201
1118 GCoroAPI = &coroapi; 1202 GCoroAPI = &coroapi;
1119 sv_setiv(sv, (IV)&coroapi); 1203 sv_setiv (sv, (IV)&coroapi);
1120 SvREADONLY_on(sv); 1204 SvREADONLY_on (sv);
1121 } 1205 }
1122} 1206}
1123 1207
1124#if !PERL_MICRO 1208int
1209prio (Coro::State coro, int newprio = 0)
1210 ALIAS:
1211 nice = 1
1212 CODE:
1213{
1214 RETVAL = coro->prio;
1125 1215
1126void 1216 if (items > 1)
1217 {
1218 if (ix)
1219 newprio += coro->prio;
1220
1221 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223
1224 coro->prio = newprio;
1225 }
1226}
1227
1228SV *
1127ready(self) 1229ready (SV *self)
1128 SV * self
1129 PROTOTYPE: $ 1230 PROTOTYPE: $
1130 CODE: 1231 CODE:
1131 api_ready (self); 1232 RETVAL = boolSV (api_ready (self));
1233 OUTPUT:
1234 RETVAL
1132 1235
1133#endif 1236SV *
1237is_ready (SV *self)
1238 PROTOTYPE: $
1239 CODE:
1240 RETVAL = boolSV (api_is_ready (self));
1241 OUTPUT:
1242 RETVAL
1134 1243
1135int 1244int
1136nready(...) 1245nready (...)
1137 PROTOTYPE: 1246 PROTOTYPE:
1138 CODE: 1247 CODE:
1139 RETVAL = coro_nready; 1248 RETVAL = coro_nready;
1140 OUTPUT: 1249 OUTPUT:
1141 RETVAL 1250 RETVAL
1142 1251
1143void 1252void
1144schedule(...) 1253_set_current (SV *current)
1145 PROTOTYPE: 1254 PROTOTYPE: $
1146 CODE: 1255 CODE:
1147 api_schedule (); 1256 SvREFCNT_dec (SvRV (coro_current));
1257 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1258
1259MODULE = Coro::State PACKAGE = Coro::AIO
1260
1261SV *
1262_get_state ()
1263 CODE:
1264{
1265 struct {
1266 int errorno;
1267 int laststype;
1268 int laststatval;
1269 Stat_t statcache;
1270 } data;
1271
1272 data.errorno = errno;
1273 data.laststype = PL_laststype;
1274 data.laststatval = PL_laststatval;
1275 data.statcache = PL_statcache;
1276
1277 RETVAL = newSVpvn ((char *)&data, sizeof data);
1278}
1279 OUTPUT:
1280 RETVAL
1148 1281
1149void 1282void
1150cede(...) 1283_set_state (char *data_)
1151 PROTOTYPE: 1284 PROTOTYPE: $
1152 CODE: 1285 CODE:
1153 api_cede (); 1286{
1287 struct {
1288 int errorno;
1289 int laststype;
1290 int laststatval;
1291 Stat_t statcache;
1292 } *data = (void *)data_;
1154 1293
1294 errno = data->errorno;
1295 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache;
1298}

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines