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Comparing Coro/Coro/State.xs (file contents):
Revision 1.23 by root, Tue Aug 14 04:33:58 2001 UTC vs.
Revision 1.119 by root, Sat Dec 2 15:41:28 2006 UTC

1#include "libcoro/coro.c"
2
1#include "EXTERN.h" 3#include "EXTERN.h"
2#include "perl.h" 4#include "perl.h"
3#include "XSUB.h" 5#include "XSUB.h"
4 6
5#include "libcoro/coro.c" 7#include "patchlevel.h"
6 8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
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)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42
7#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
8 53
9#ifdef HAVE_MMAP 54#ifdef HAVE_MMAP
10# include <unistd.h> 55# include <unistd.h>
11# include <sys/mman.h> 56# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 57# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 58# ifdef MAP_ANON
59# define MAP_ANONYMOUS MAP_ANON
15# else 60# else
16# undef HAVE_MMAP 61# undef HAVE_MMAP
17# endif 62# endif
18# 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
19#endif 71# endif
72#else
73# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0
75#endif
20 76
21#define MAY_FLUSH /* increases codesize */
22
23#define SUB_INIT "Coro::State::initialize"
24#define UCORO_STATE "_coro_state"
25
26/* The next macro should delcare a variable stacklevel that contains and approximation 77/* The next macro should declare a variable stacklevel that contains and approximation
27 * 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
28 * and should be unique. */ 79 * and should be unique. */
80#define dSTACKLEVEL int stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 81#define STACKLEVEL ((void *)&stacklevel)
30 82
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 83#define IN_DESTRUCT (PL_main_cv == Nullcv)
84
85#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x)
87#else
88# define attribute(x)
89#endif
90
91#define NOINLINE attribute ((noinline))
32 92
33#include "CoroAPI.h" 93#include "CoroAPI.h"
34 94
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96
97#ifdef USE_ITHREADS
98static perl_mutex coro_mutex;
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif
105
35static struct CoroAPI coroapi; 106static struct CoroAPI coroapi;
107static AV *main_mainstack; /* used to differentiate between $main and others */
108static HV *coro_state_stash, *coro_stash;
109static SV *coro_mortal; /* will be freed after next transfer */
36 110
37/* 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 */
38typedef struct { 115typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 116 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 117
43 coro_context cctx; 118 /* the stack */
44
45 void *sptr; 119 void *sptr;
46 long ssize; /* positive == mmap, otherwise malloc */ 120 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack;
48 121
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 */
49struct coro { 141struct coro {
50 /* the optional C context */ 142 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 143 coro_cctx *cctx;
52 void *cursp; 144
145 /* data associated with this coroutine (initial args) */
146 AV *args;
53 int gencnt; 147 int refcnt;
148 int flags;
54 149
55 /* optionally saved, might be zero */ 150 /* optionally saved, might be zero */
56 AV *defav; 151 AV *defav;
57 SV *defsv; 152 SV *defsv;
58 SV *errsv; 153 SV *errsv;
59 154
60 /* saved global state not related to stacks */ 155#define VAR(name,type) type name;
61 U8 dowarn; 156# include "state.h"
62 I32 in_eval; 157#undef VAR
63 158
64 /* the stacks and related info (callchain etc..) */ 159 /* coro process data */
65 PERL_SI *curstackinfo; 160 int prio;
66 AV *curstack;
67 AV *mainstack;
68 SV **stack_sp;
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91
92 /* data associated with this coroutine (initial args) */
93 AV *args;
94}; 161};
95 162
96typedef struct coro *Coro__State; 163typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 164typedef struct coro *Coro__State_or_hashref;
98 165
99static AV *main_mainstack; /* used to differentiate between $main and others */ 166static AV *
100static HV *coro_state_stash; 167coro_clone_padlist (CV *cv)
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{ 168{
109 AV *av; 169 AV *padlist = CvPADLIST (cv);
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad; 170 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 171
128 newpadlist = newAV (); 172 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 173 AvREAL_off (newpadlist);
130 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)));
131 av_store (newpadlist, 1, (SV *) newpad); 183 av_store (newpadlist, 1, (SV *)newpad);
132 184
133 av = newAV (); /* will be @_ */ 185 return newpadlist;
134 av_extend (av, 0); 186}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 187
138 for (ix = fpad; ix > 0; ix--) 188static void
189free_padlist (AV *padlist)
190{
191 /* may be during global destruction */
192 if (SvREFCNT (padlist))
139 { 193 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 194 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 195 while (i >= 0)
142 { 196 {
143 char *name = SvPVX (namesv); /* XXX */ 197 SV **svp = av_fetch (padlist, i--, FALSE);
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 198 if (svp)
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 } 199 {
148 else
149 { /* our own lexical */
150 SV *sv; 200 SV *sv;
151 if (*name == '&') 201 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152 sv = SvREFCNT_inc (ppad[ix]); 202 SvREFCNT_dec (sv);
153 else if (*name == '@') 203
154 sv = (SV *) newAV (); 204 SvREFCNT_dec (*svp);
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 } 205 }
163 } 206 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 207
165 { 208 SvREFCNT_dec ((SV*)padlist);
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 } 209 }
210}
175 211
176#if 0 /* return -ENOTUNDERSTOOD */ 212static int
177 /* Now that vars are all in place, clone nested closures. */ 213coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
214{
215 AV *padlist;
216 AV *av = (AV *)mg->mg_obj;
178 217
179 for (ix = fpad; ix > 0; ix--) { 218 /* casting is fun. */
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
181 if (namesv 220 free_padlist (padlist);
182 && namesv != &PL_sv_undef 221
183 && !(SvFLAGS(namesv) & SVf_FAKE) 222 SvREFCNT_dec (av);
184 && *SvPVX(namesv) == '&' 223
185 && CvCLONE(ppad[ix])) 224 return 0;
186 { 225}
187 CV *kid = cv_clone((CV*)ppad[ix]); 226
188 SvREFCNT_dec(ppad[ix]); 227#define PERL_MAGIC_coro PERL_MAGIC_ext
189 CvCLONE_on(kid); 228
190 SvPADMY_on(kid); 229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
191 npad[ix] = (SV*)kid; 230
192 } 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
238/* the next two functions merely cache the padlists */
239static void
240get_padlist (CV *cv)
241{
242 MAGIC *mg = CORO_MAGIC (cv);
243 AV *av;
244
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
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
256 CvPADLIST (cv) = coro_clone_padlist (cv);
257#endif
258 }
259}
260
261static void
262put_padlist (CV *cv)
263{
264 MAGIC *mg = CORO_MAGIC (cv);
265 AV *av;
266
267 if (!mg)
268 {
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
193 } 273 }
194#endif
195 274
196 return newpadlist; 275 av = (AV *)mg->mg_obj;
197}
198 276
199#ifdef MAY_FLUSH 277 if (AvFILLp (av) >= AvMAX (av))
200STATIC AV * 278 av_extend (av, AvMAX (av) + 1);
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214 279
215 SvREFCNT_dec((SV*)padlist); 280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
216 }
217} 281}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271 282
272#define SB do { 283#define SB do {
273#define SE } while (0) 284#define SE } while (0)
274 285
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 286#define LOAD(state) load_state ((state))
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 287#define SAVE(state,flags) save_state ((state),(flags))
277 288
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
279 290
280static void 291static void
281load_state(pTHX_ Coro__State c) 292load_state (Coro__State c)
282{ 293{
283 PL_dowarn = c->dowarn; 294#define VAR(name,type) PL_ ## name = c->name;
284 PL_in_eval = c->in_eval; 295# include "state.h"
285 296#undef VAR
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 297
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316 301
… …
319 CV *cv; 304 CV *cv;
320 305
321 /* now do the ugly restore mess */ 306 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 307 while ((cv = (CV *)POPs))
323 { 308 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 309 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 310 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 311 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 312 }
337 313
338 PUTBACK; 314 PUTBACK;
339 } 315 }
340} 316}
341 317
342static void 318static void
343save_state(pTHX_ Coro__State c, int flags) 319save_state (Coro__State c, int flags)
344{ 320{
345 { 321 {
346 dSP; 322 dSP;
347 I32 cxix = cxstack_ix; 323 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 324 PERL_CONTEXT *ccstk = cxstack;
… …
355 331
356 PUSHs (Nullsv); 332 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 333 /* this loop was inspired by pp_caller */
358 for (;;) 334 for (;;)
359 { 335 {
360 do 336 while (cxix >= 0)
361 { 337 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 338 PERL_CONTEXT *cx = &ccstk[cxix--];
363 339
364 if (CxTYPE(cx) == CXt_SUB) 340 if (CxTYPE (cx) == CXt_SUB)
365 { 341 {
366 CV *cv = cx->blk_sub.cv; 342 CV *cv = cx->blk_sub.cv;
343
367 if (CvDEPTH(cv)) 344 if (CvDEPTH (cv))
368 { 345 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 346 EXTEND (SP, 3);
375 347
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 348 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 350 PUSHs ((SV *)cv);
385 351
352 CvDEPTH (cv) = 0;
386 get_padlist (cv); /* this is a monster */ 353 get_padlist (cv);
387 } 354 }
388 } 355 }
356#ifdef CXt_FORMAT
389 else if (CxTYPE(cx) == CXt_FORMAT) 357 else if (CxTYPE (cx) == CXt_FORMAT)
390 { 358 {
391 /* 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? */
392 /* my bold guess is as a simple, plain sub... */ 360 /* my bold guess is as a simple, plain sub... */
393 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");
394 } 362 }
363#endif
395 } 364 }
396 while (cxix >= 0);
397 365
398 if (top_si->si_type == PERLSI_MAIN) 366 if (top_si->si_type == PERLSI_MAIN)
399 break; 367 break;
400 368
401 top_si = top_si->si_prev; 369 top_si = top_si->si_prev;
… …
408 376
409 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;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412 380
413 /* I have not the slightest idea of why av_reify is necessary */ 381#define VAR(name,type)c->name = PL_ ## name;
414 /* but if it's missing the defav contents magically get replaced sometimes */ 382# include "state.h"
415 if (c->defav) 383#undef VAR
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447} 384}
448 385
449/* 386/*
450 * allocate various perl stacks. This is an exact copy 387 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 388 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 389 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 390 * not usually need a lot of stackspace.
454 */ 391 */
455STATIC void 392static void
456coro_init_stacks (pTHX) 393coro_init_stacks ()
457{ 394{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
459 PL_curstackinfo->si_type = PERLSI_MAIN; 396 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 397 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 399
463 PL_stack_base = AvARRAY(PL_curstack); 400 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base; 401 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466 403
467 New(50,PL_tmps_stack,96,SV*); 404 New(50,PL_tmps_stack,128,SV*);
468 PL_tmps_floor = -1; 405 PL_tmps_floor = -1;
469 PL_tmps_ix = -1; 406 PL_tmps_ix = -1;
470 PL_tmps_max = 96; 407 PL_tmps_max = 128;
471 408
472 New(54,PL_markstack,16,I32); 409 New(54,PL_markstack,32,I32);
473 PL_markstack_ptr = PL_markstack; 410 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 411 PL_markstack_max = PL_markstack + 32;
475 412
413#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 414 SET_MARK_OFFSET;
415#endif
477 416
478 New(54,PL_scopestack,16,I32); 417 New(54,PL_scopestack,32,I32);
479 PL_scopestack_ix = 0; 418 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 419 PL_scopestack_max = 32;
481 420
482 New(54,PL_savestack,96,ANY); 421 New(54,PL_savestack,64,ANY);
483 PL_savestack_ix = 0; 422 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 423 PL_savestack_max = 64;
485 424
425#if !PERL_VERSION_ATLEAST (5,9,0)
486 New(54,PL_retstack,8,OP*); 426 New(54,PL_retstack,16,OP*);
487 PL_retstack_ix = 0; 427 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 428 PL_retstack_max = 16;
429#endif
489} 430}
490 431
491/* 432/*
492 * destroy the stacks, the callchain etc... 433 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 434 */
495STATIC void 435static void
496destroy_stacks(pTHX) 436coro_destroy_stacks ()
497{ 437{
438 if (!IN_DESTRUCT)
439 {
498 /* is this ugly, I ask? */ 440 /* is this ugly, I ask? */
499 while (PL_scopestack_ix) 441 LEAVE_SCOPE (0);
500 LEAVE;
501 442
502 /* sure it is, but more important: is it correct?? :/ */ 443 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS; 444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
505 448
506 while (PL_curstackinfo->si_next) 449 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 450 PL_curstackinfo = PL_curstackinfo->si_next;
508 451
509 while (PL_curstackinfo) 452 while (PL_curstackinfo)
510 { 453 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 454 PERL_SI *p = PL_curstackinfo->si_prev;
512 455
513 { 456 { /*D*//*remove*/
514 dSP; 457 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */ 459 PUTBACK; /* possibly superfluous */
517 } 460 }
518 461
519 dounwind(-1); 462 if (!IN_DESTRUCT)
520 463 {
464 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 465 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467
522 Safefree(PL_curstackinfo->si_cxstack); 468 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree(PL_curstackinfo); 469 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 470 PL_curstackinfo = p;
525 } 471 }
526 472
527 Safefree(PL_tmps_stack); 473 Safefree (PL_tmps_stack);
528 Safefree(PL_markstack); 474 Safefree (PL_markstack);
529 Safefree(PL_scopestack); 475 Safefree (PL_scopestack);
530 Safefree(PL_savestack); 476 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0)
531 Safefree(PL_retstack); 478 Safefree (PL_retstack);
532}
533
534static void
535allocate_stack (Coro__State ctx, int alloc)
536{
537 coro_stack *stack;
538
539 New (0, stack, 1, coro_stack);
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544 if (alloc)
545 {
546#ifdef HAVE_MMAP
547 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
548 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
549 if (stack->sptr == (void *)-1)
550#endif 479#endif
551 {
552 /*FIXME*//*D*//* reasonable stack size! */
553 stack->ssize = -4096 * sizeof (long);
554 New (0, stack->sptr, 4096, long);
555 }
556 }
557 else
558 stack->sptr = 0;
559
560 ctx->stack = stack;
561} 480}
562 481
563static void 482static void
564deallocate_stack (Coro__State ctx) 483setup_coro (struct coro *coro)
565{
566 coro_stack *stack = ctx->stack;
567
568 ctx->stack = 0;
569
570 if (stack)
571 {
572 if (!--stack->refcnt)
573 {
574#ifdef HAVE_MMAP
575 if (stack->ssize > 0 && stack->sptr)
576 munmap (stack->sptr, stack->ssize);
577 else
578#else
579 Safefree (stack->sptr);
580#endif
581 Safefree (stack);
582 }
583 else if (ctx->gencnt == stack->gencnt)
584 --stack->usecnt;
585 }
586}
587
588static void
589setup_coro (void *arg)
590{ 484{
591 /* 485 /*
592 * emulate part of the perl startup here. 486 * emulate part of the perl startup here.
593 */ 487 */
488
489 coro_init_stacks ();
490
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
505 SvREFCNT_dec (GvAV (PL_defgv));
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP);
509 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID;
511
512 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN;
519 }
520
521 ENTER; /* necessary e.g. for dounwind */
522}
523
524static void
525free_coro_mortal ()
526{
527 if (coro_mortal)
528 {
529 SvREFCNT_dec (coro_mortal);
530 coro_mortal = 0;
531 }
532}
533
534static void NOINLINE
535prepare_cctx (coro_cctx *cctx)
536{
594 dSP; 537 dSP;
595 Coro__State ctx = (Coro__State)arg; 538 LOGOP myop;
596 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
597 539
598 coro_init_stacks (aTHX); 540 Zero (&myop, 1, LOGOP);
599 /*PL_curcop = 0;*/ 541 myop.op_next = PL_op;
600 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 542 myop.op_flags = OPf_WANT_VOID;
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = ctx->args;
603 543
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);
604 SPAGAIN; 550 SPAGAIN;
605
606 if (ctx->stack)
607 {
608 ctx->cursp = 0;
609
610 PUSHMARK(SP);
611 PUTBACK;
612 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
613
614 if (SvTRUE (ERRSV))
615 croak (NULL);
616 else
617 croak ("FATAL: CCTXT coroutine returned!");
618 }
619 else
620 {
621 UNOP myop;
622
623 PL_op = (OP *)&myop;
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 }
644} 551}
645 552
646static void 553static void
647continue_coro (void *arg) 554coro_run (void *arg)
648{ 555{
556 /* coro_run is the alternative epilogue of transfer() */
557 UNLOCK;
558
649 /* 559 /*
650 * this is a _very_ stripped down perl interpreter ;) 560 * this is a _very_ stripped down perl interpreter ;)
651 */ 561 */
652 Coro__State ctx = (Coro__State)arg; 562 PL_top_env = &PL_start_env;
653 563
654 /*FIXME*//* must set up top_env here */ 564 /* inject call to cctx_init */
655 ctx->cursp = 0; 565 prepare_cctx ((coro_cctx *)arg);
656 PL_op = PL_op->op_next;
657 CALLRUNOPS(aTHX);
658 566
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);
659 abort (); 571 abort ();
660} 572}
661 573
662STATIC void 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
663transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 686transfer (struct coro *prev, struct coro *next, int flags)
664{ 687{
665 dSP;
666 dSTACKLEVEL; 688 dSTACKLEVEL;
667 689
690 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL)
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
668 if (prev != next) 693 else if (prev != next)
669 { 694 {
670 if (next->mainstack) 695 coro_cctx *prev__cctx;
696
697 if (prev->flags & CF_NEW)
671 { 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->flags & CF_NEW)
719 {
720 /* need to start coroutine */
721 next->flags &= ~CF_NEW;
722 /* first get rid of the old state */
723 SAVE (prev, -1);
724 /* setup coroutine call */
725 setup_coro (next);
726 /* need a new stack */
727 assert (!next->stack);
728 }
729 else
730 {
731 /* coroutine already started */
672 SAVE (prev, flags); 732 SAVE (prev, flags);
673 LOAD (next); 733 LOAD (next);
674
675 /* mark this state as in-use */
676 next->mainstack = 0;
677 next->tmps_ix = -2;
678
679 /* stacklevel changed? if yes, grab the stack for us! */
680 if (flags & TRANSFER_SAVE_CCTXT)
681 {
682 if (!prev->stack)
683 allocate_stack (prev, 0);
684 else if (prev->cursp != stacklevel
685 && prev->stack->usecnt > 1)
686 {
687 prev->gencnt = ++prev->stack->gencnt;
688 prev->stack->usecnt = 1;
689 }
690
691 /* has our stack been invalidated? */
692 if (next->stack && next->stack->gencnt != next->gencnt)
693 {
694 deallocate_stack (next);
695 allocate_stack (next, 1);
696 coro_create (&(next->stack->cctx),
697 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize));
699 }
700
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
702 }
703
704 } 734 }
705 else if (next->tmps_ix == -2) 735
706 croak ("tried to transfer to running coroutine"); 736 prev__cctx = prev->cctx;
707 else 737
738 /* possibly "free" the cctx */
739 if (prev__cctx->idle_sp == STACKLEVEL)
708 { 740 {
709 SAVE (prev, -1); /* first get rid of the old state */ 741 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742 assert (PL_top_env == prev__cctx->top_env);
710 743
711 if (flags & TRANSFER_SAVE_CCTXT) 744 prev->cctx = 0;
712 {
713 if (!prev->stack)
714 allocate_stack (prev, 0);
715 745
716 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 746 cctx_put (prev__cctx);
717 { 747 prev__cctx->inuse = 0;
718 setup_coro (next);
719
720 prev->stack->refcnt++;
721 prev->stack->usecnt++;
722 next->stack = prev->stack;
723 next->gencnt = prev->gencnt;
724 }
725 else
726 {
727 allocate_stack (next, 1);
728 coro_create (&(next->stack->cctx),
729 setup_coro, (void *)next,
730 next->stack->sptr, labs (next->stack->ssize));
731 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
732 }
733 }
734 else
735 setup_coro (next);
736 } 748 }
749
750 if (!next->cctx)
751 {
752 next->cctx = cctx_get ();
753 assert (!next->cctx->inuse);
754 next->cctx->inuse = 1;
755 }
756
757 if (prev__cctx != next->cctx)
758 {
759 prev__cctx->top_env = PL_top_env;
760 PL_top_env = next->cctx->top_env;
761 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762 }
763
764 free_coro_mortal ();
765
766 UNLOCK;
737 } 767 }
738
739 next->cursp = stacklevel;
740} 768}
769
770struct transfer_args
771{
772 struct coro *prev, *next;
773 int flags;
774};
775
776#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
777
778static void
779coro_state_destroy (struct coro *coro)
780{
781 if (coro->refcnt--)
782 return;
783
784 if (coro->mainstack && coro->mainstack != main_mainstack)
785 {
786 struct coro temp;
787
788 if (coro->flags & CF_RUNNING)
789 croak ("FATAL: tried to destroy currently running coroutine");
790
791 SAVE ((&temp), TRANSFER_SAVE_ALL);
792 LOAD (coro);
793
794 coro_destroy_stacks ();
795
796 LOAD ((&temp)); /* this will get rid of defsv etc.. */
797
798 coro->mainstack = 0;
799 }
800
801 cctx_destroy (coro->cctx);
802 SvREFCNT_dec (coro->args);
803 Safefree (coro);
804}
805
806static int
807coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
808{
809 struct coro *coro = (struct coro *)mg->mg_ptr;
810 mg->mg_ptr = 0;
811
812 coro_state_destroy (coro);
813
814 return 0;
815}
816
817static int
818coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
819{
820 struct coro *coro = (struct coro *)mg->mg_ptr;
821
822 ++coro->refcnt;
823
824 return 0;
825}
826
827static MGVTBL coro_state_vtbl = {
828 0, 0, 0, 0,
829 coro_state_clear,
830 0,
831#ifdef MGf_DUP
832 coro_state_dup,
833#else
834# define MGf_DUP 0
835#endif
836};
741 837
742static struct coro * 838static struct coro *
743sv_to_coro (SV *arg, const char *funcname, const char *varname) 839SvSTATE (SV *coro)
744{ 840{
745 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 841 HV *stash;
842 MAGIC *mg;
843
844 if (SvROK (coro))
845 coro = SvRV (coro);
846
847 stash = SvSTASH (coro);
848 if (stash != coro_stash && stash != coro_state_stash)
746 { 849 {
747 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 850 /* very slow, but rare, check */
748 851 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
749 if (!he) 852 croak ("Coro::State object required");
750 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
751
752 arg = HeVAL(he);
753 } 853 }
754
755 /* must also be changed inside Coro::Cont::yield */
756 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
757 return (struct coro *) SvIV((SV*)SvRV(arg));
758 else
759 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
760}
761 854
855 mg = SvMAGIC (coro);
856 assert (mg->mg_type == PERL_MAGIC_ext);
857 return (struct coro *)mg->mg_ptr;
858}
859
762static void 860static void
861prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
862{
863 ta->prev = SvSTATE (prev);
864 ta->next = SvSTATE (next);
865 ta->flags = flags;
866}
867
868static void
763api_transfer(pTHX_ SV *prev, SV *next, int flags) 869api_transfer (SV *prev, SV *next, int flags)
764{ 870{
765 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 871 struct transfer_args ta;
766 sv_to_coro (next, "Coro::transfer", "next"), 872
767 flags); 873 prepare_transfer (&ta, prev, next, flags);
874 TRANSFER (ta);
768} 875}
769 876
770/** Coro ********************************************************************/ 877/** Coro ********************************************************************/
771 878
772#define PRIO_MAX 3 879#define PRIO_MAX 3
… …
775#define PRIO_LOW -1 882#define PRIO_LOW -1
776#define PRIO_IDLE -3 883#define PRIO_IDLE -3
777#define PRIO_MIN -4 884#define PRIO_MIN -4
778 885
779/* for Coro.pm */ 886/* for Coro.pm */
780static GV *coro_current, *coro_idle; 887static SV *coro_current;
781static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 888static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889static int coro_nready;
782 890
783static void 891static void
784coro_enq (SV *sv) 892coro_enq (SV *coro_sv)
785{ 893{
786 if (SvROK (sv)) 894 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
787 { 895 coro_nready++;
788 SV *hv = SvRV (sv);
789 if (SvTYPE (hv) == SVt_PVHV)
790 {
791 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
792 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
793
794 prio = prio > PRIO_MAX ? PRIO_MAX
795 : prio < PRIO_MIN ? PRIO_MIN
796 : prio;
797
798 av_push (coro_ready [prio - PRIO_MIN], sv);
799
800 return;
801 }
802 }
803
804 croak ("Coro::ready tried to enqueue something that is not a coroutine");
805} 896}
806 897
807static SV * 898static SV *
808coro_deq (int min_prio) 899coro_deq (int min_prio)
809{ 900{
… …
812 min_prio -= PRIO_MIN; 903 min_prio -= PRIO_MIN;
813 if (min_prio < 0) 904 if (min_prio < 0)
814 min_prio = 0; 905 min_prio = 0;
815 906
816 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 907 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
817 if (av_len (coro_ready[prio]) >= 0) 908 if (AvFILLp (coro_ready [prio]) >= 0)
909 {
910 coro_nready--;
818 return av_shift (coro_ready[prio]); 911 return av_shift (coro_ready [prio]);
912 }
819 913
820 return 0; 914 return 0;
821} 915}
822 916
823static void 917static int
824api_ready (SV *coro) 918api_ready (SV *coro_sv)
825{ 919{
920 struct coro *coro;
921
922 if (SvROK (coro_sv))
923 coro_sv = SvRV (coro_sv);
924
925 coro = SvSTATE (coro_sv);
926
927 if (coro->flags & CF_READY)
928 return 0;
929
930#if 0 /* this is actually harmless */
931 if (coro->flags & CF_RUNNING)
932 croak ("Coro::ready called on currently running coroutine");
933#endif
934
935 coro->flags |= CF_READY;
936
937 LOCK;
826 coro_enq (SvREFCNT_inc (coro)); 938 coro_enq (SvREFCNT_inc (coro_sv));
827} 939 UNLOCK;
828 940
941 return 1;
942}
943
829static void 944static int
830api_schedule (int cede) 945api_is_ready (SV *coro_sv)
946{
947 return !!SvSTATE (coro_sv)->flags & CF_READY;
948}
949
950static void
951prepare_schedule (struct transfer_args *ta)
831{ 952{
832 SV *prev, *next; 953 SV *prev, *next;
833 954
834 prev = GvSV (coro_current); 955 for (;;)
835 956 {
836 if (cede) 957 LOCK;
837 coro_enq (SvREFCNT_inc (prev));
838
839 next = coro_deq (PRIO_MIN); 958 next = coro_deq (PRIO_MIN);
959 UNLOCK;
840 960
841 if (!next) 961 if (next)
842 next = SvREFCNT_inc (GvSV (coro_idle)); 962 break;
843 963
844 GvSV (coro_current) = SvREFCNT_inc (next); 964 {
845 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 965 dSP;
846 sv_to_coro (next, "Coro::schedule", "next coroutine"), 966
847 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 967 ENTER;
848 SvREFCNT_dec (next); 968 SAVETMPS;
849 SvREFCNT_dec (prev); 969
970 PUSHMARK (SP);
971 PUTBACK;
972 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974 FREETMPS;
975 LEAVE;
976 }
977 }
978
979 prev = SvRV (coro_current);
980 SvRV_set (coro_current, next);
981
982 /* free this only after the transfer */
983 LOCK;
984 free_coro_mortal ();
985 UNLOCK;
986 coro_mortal = prev;
987
988 assert (!SvROK(prev));//D
989 assert (!SvROK(next));//D
990
991 ta->prev = SvSTATE (prev);
992 ta->next = SvSTATE (next);
993 ta->flags = TRANSFER_SAVE_ALL;
994
995 assert (ta->flags & CF_READY);
996 ta->next->flags &= ~CF_READY;
997}
998
999static void
1000prepare_cede (struct transfer_args *ta)
1001{
1002 api_ready (coro_current);
1003
1004 prepare_schedule (ta);
1005}
1006
1007static void
1008api_schedule (void)
1009{
1010 struct transfer_args ta;
1011
1012 prepare_schedule (&ta);
1013 TRANSFER (ta);
1014}
1015
1016static void
1017api_cede (void)
1018{
1019 struct transfer_args ta;
1020
1021 prepare_cede (&ta);
1022 TRANSFER (ta);
850} 1023}
851 1024
852MODULE = Coro::State PACKAGE = Coro::State 1025MODULE = Coro::State PACKAGE = Coro::State
853 1026
854PROTOTYPES: ENABLE 1027PROTOTYPES: DISABLE
855 1028
856BOOT: 1029BOOT:
857{ /* {} necessary for stoopid perl-5.6.x */ 1030{
858 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1031#ifdef USE_ITHREADS
859 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1032 MUTEX_INIT (&coro_mutex);
1033#endif
1034 BOOT_PAGESIZE;
1035
860 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1036 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
861 1037
862 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1038 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
863 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1039 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
864 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1040 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
865 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
866
867 if (!padlist_cache)
868 padlist_cache = newHV ();
869 1041
870 main_mainstack = PL_mainstack; 1042 main_mainstack = PL_mainstack;
871 1043
872 {
873 SV *sv = perl_get_sv("Coro::API", 1);
874
875 coroapi.ver = CORO_API_VERSION - 1; 1044 coroapi.ver = CORO_API_VERSION;
876 coroapi.transfer = api_transfer; 1045 coroapi.transfer = api_transfer;
877 coroapi.schedule = api_schedule;
878 coroapi.ready = api_ready;
879 1046
880 GCoroAPI = &coroapi; 1047 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
881 sv_setiv(sv, (IV)&coroapi);
882 SvREADONLY_on(sv);
883 }
884} 1048}
885 1049
886Coro::State 1050SV *
887_newprocess(args) 1051new (char *klass, ...)
888 SV * args
889 PROTOTYPE: $
890 CODE: 1052 CODE:
891 Coro__State coro; 1053{
1054 struct coro *coro;
1055 HV *hv;
1056 int i;
892 1057
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
894 croak ("Coro::State::_newprocess expects an arrayref");
895
896 New (0, coro, 1, struct coro); 1058 Newz (0, coro, 1, struct coro);
1059 coro->args = newAV ();
1060 coro->flags = CF_NEW;
897 1061
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1062 hv = newHV ();
899 coro->mainstack = 0; /* actual work is done inside transfer */ 1063 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
900 coro->stack = 0; 1064 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
901 1065
902 RETVAL = coro; 1066 for (i = 1; i < items; i++)
1067 av_push (coro->args, newSVsv (ST (i)));
1068}
903 OUTPUT: 1069 OUTPUT:
904 RETVAL 1070 RETVAL
905 1071
906void 1072void
907transfer(prev, next, flags) 1073_set_stacklevel (...)
908 Coro::State_or_hashref prev 1074 ALIAS:
909 Coro::State_or_hashref next 1075 Coro::State::transfer = 1
910 int flags 1076 Coro::schedule = 2
911 PROTOTYPE: @ 1077 Coro::cede = 3
912 CODE: 1078 CODE:
913 PUTBACK; 1079{
914 transfer (aTHX_ prev, next, flags); 1080 struct transfer_args ta;
915 SPAGAIN; 1081
1082 switch (ix)
1083 {
1084 case 0:
1085 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086 ta.next = 0;
1087 ta.flags = TRANSFER_SET_STACKLEVEL;
1088 break;
1089
1090 case 1:
1091 if (items != 3)
1092 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1093
1094 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1095 break;
1096
1097 case 2:
1098 prepare_schedule (&ta);
1099 break;
1100
1101 case 3:
1102 prepare_cede (&ta);
1103 break;
1104 }
1105
1106 TRANSFER (ta);
1107}
916 1108
917void 1109void
918DESTROY(coro) 1110_clone_state_from (SV *dst, SV *src)
919 Coro::State coro 1111 CODE:
920 CODE: 1112{
1113 struct coro *coro_src = SvSTATE (src);
921 1114
922 if (coro->mainstack && coro->mainstack != main_mainstack) 1115 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
923 {
924 struct coro temp;
925 1116
926 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1117 ++coro_src->refcnt;
927 LOAD(aTHX_ coro); 1118 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
928 1119}
929 destroy_stacks (aTHX);
930
931 LOAD((&temp)); /* this will get rid of defsv etc.. */
932
933 coro->mainstack = 0;
934 }
935
936 deallocate_stack (coro);
937
938 Safefree (coro);
939 1120
940void 1121void
941flush()
942 CODE:
943#ifdef MAY_FLUSH
944 flush_padlist_cache ();
945#endif
946
947void
948_exit(code) 1122_exit (code)
949 int code 1123 int code
950 PROTOTYPE: $ 1124 PROTOTYPE: $
951 CODE: 1125 CODE:
952#if defined(__GLIBC__) || _POSIX_C_SOURCE
953 _exit (code); 1126 _exit (code);
954#else
955 signal (SIGTERM, SIG_DFL);
956 raise (SIGTERM);
957 exit (code);
958#endif
959 1127
960MODULE = Coro::State PACKAGE = Coro::Cont 1128int
1129cctx_count ()
1130 CODE:
1131 RETVAL = cctx_count;
1132 OUTPUT:
1133 RETVAL
961 1134
962# this is slightly dirty (should expose a c-level api) 1135int
963 1136cctx_idle ()
964void 1137 CODE:
965yield(...) 1138 RETVAL = cctx_idle;
966 PROTOTYPE: @ 1139 OUTPUT:
967 CODE: 1140 RETVAL
968 static SV *returnstk;
969 SV *sv;
970 AV *defav = GvAV (PL_defgv);
971 struct coro *prev, *next;
972
973 if (!returnstk)
974 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
975
976 /* set up @_ -- ugly */
977 av_clear (defav);
978 av_fill (defav, items - 1);
979 while (items--)
980 av_store (defav, items, SvREFCNT_inc (ST(items)));
981
982 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
983 sv = av_pop ((AV *)SvRV (returnstk));
984 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
985 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
986 SvREFCNT_dec (sv);
987
988 transfer(aTHX_ prev, next, 0);
989 1141
990MODULE = Coro::State PACKAGE = Coro 1142MODULE = Coro::State PACKAGE = Coro
991 1143
992# this is slightly dirty (should expose a c-level api)
993
994BOOT: 1144BOOT:
995{ 1145{
996 int i; 1146 int i;
1147
997 HV *stash = gv_stashpv ("Coro", TRUE); 1148 coro_stash = gv_stashpv ("Coro", TRUE);
998 1149
999 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1150 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1000 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1151 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1001 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1152 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1002 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1153 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1003 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1154 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1004 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1155 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1005 1156
1006 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1157 coro_current = get_sv ("Coro::current", FALSE);
1007 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1158 SvREADONLY_on (coro_current);
1008 1159
1009 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1160 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1010 coro_ready[i] = newAV (); 1161 coro_ready[i] = newAV ();
1162
1163 {
1164 SV *sv = perl_get_sv("Coro::API", 1);
1165
1166 coroapi.schedule = api_schedule;
1167 coroapi.cede = api_cede;
1168 coroapi.ready = api_ready;
1169 coroapi.is_ready = api_is_ready;
1170 coroapi.nready = &coro_nready;
1171 coroapi.current = coro_current;
1172
1173 GCoroAPI = &coroapi;
1174 sv_setiv (sv, (IV)&coroapi);
1175 SvREADONLY_on (sv);
1176 }
1011} 1177}
1178
1179int
1180prio (Coro::State coro, int newprio = 0)
1181 ALIAS:
1182 nice = 1
1183 CODE:
1184{
1185 RETVAL = coro->prio;
1186
1187 if (items > 1)
1188 {
1189 if (ix)
1190 newprio += coro->prio;
1191
1192 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194
1195 coro->prio = newprio;
1196 }
1197}
1198
1199SV *
1200ready (SV *self)
1201 PROTOTYPE: $
1202 CODE:
1203 RETVAL = boolSV (api_ready (self));
1204 OUTPUT:
1205 RETVAL
1206
1207SV *
1208is_ready (SV *self)
1209 PROTOTYPE: $
1210 CODE:
1211 RETVAL = boolSV (api_is_ready (self));
1212 OUTPUT:
1213 RETVAL
1214
1215int
1216nready (...)
1217 PROTOTYPE:
1218 CODE:
1219 RETVAL = coro_nready;
1220 OUTPUT:
1221 RETVAL
1012 1222
1013void 1223void
1014ready(self) 1224_set_current (SV *current)
1015 SV * self 1225 PROTOTYPE: $
1016 CODE: 1226 CODE:
1017 api_ready (self); 1227 SvREFCNT_dec (SvRV (coro_current));
1228 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1229
1230MODULE = Coro::State PACKAGE = Coro::AIO
1231
1232SV *
1233_get_state ()
1234 CODE:
1235{
1236 struct {
1237 int errorno;
1238 int laststype;
1239 int laststatval;
1240 Stat_t statcache;
1241 } data;
1242
1243 data.errorno = errno;
1244 data.laststype = PL_laststype;
1245 data.laststatval = PL_laststatval;
1246 data.statcache = PL_statcache;
1247
1248 RETVAL = newSVpvn ((char *)&data, sizeof data);
1249}
1250 OUTPUT:
1251 RETVAL
1018 1252
1019void 1253void
1020schedule(...) 1254_set_state (char *data_)
1021 ALIAS: 1255 PROTOTYPE: $
1022 cede = 1
1023 CODE: 1256 CODE:
1024 api_schedule (ix); 1257{
1258 struct {
1259 int errorno;
1260 int laststype;
1261 int laststatval;
1262 Stat_t statcache;
1263 } *data = (void *)data_;
1025 1264
1265 errno = data->errorno;
1266 PL_laststype = data->laststype;
1267 PL_laststatval = data->laststatval;
1268 PL_statcache = data->statcache;
1269}

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