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Comparing Coro/Coro/State.xs (file contents):
Revision 1.37 by root, Tue Oct 9 00:39:11 2001 UTC vs.
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC

1#include "libcoro/coro.c"
2
1#include "EXTERN.h" 3#include "EXTERN.h"
2#include "perl.h" 4#include "perl.h"
3#include "XSUB.h" 5#include "XSUB.h"
4 6
5#include "libcoro/coro.c" 7#include "patchlevel.h"
6 8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
7#include <signal.h> 40#include <stdio.h>
41#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
8 50
9#ifdef HAVE_MMAP 51#ifdef HAVE_MMAP
10# include <unistd.h> 52# include <unistd.h>
11# include <sys/mman.h> 53# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 56# define MAP_ANONYMOUS MAP_ANON
15# else 57# else
16# undef HAVE_MMAP 58# undef HAVE_MMAP
17# endif 59# endif
18# endif 60# endif
61# include <limits.h>
62# ifndef PAGESIZE
63# define PAGESIZE pagesize
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE (void)0
19#endif 68# endif
20 69#else
21#define MAY_FLUSH /* increases codesize and is rarely used */ 70# define PAGESIZE 0
22 71# define BOOT_PAGESIZE (void)0
23#define SUB_INIT "Coro::State::initialize" 72#endif
24#define UCORO_STATE "_coro_state"
25 73
26/* The next macro should declare a variable stacklevel that contains and approximation 74/* The next macro should declare a variable stacklevel that contains and approximation
27 * to the current C stack pointer. Its property is that it changes with each call 75 * to the current C stack pointer. Its property is that it changes with each call
28 * and should be unique. */ 76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 78#define STACKLEVEL ((void *)&stacklevel)
30 79
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 81
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif
87
88#define NOINLINE attribute ((noinline))
34 89
35#include "CoroAPI.h" 90#include "CoroAPI.h"
36 91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS
95static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif
102
37static struct CoroAPI coroapi; 103static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */
105static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */
38 107
39/* this is actually not only the c stack but also c registers etc... */ 108static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle;
110
111/* this is a structure representing a c-level coroutine */
40typedef struct { 112typedef struct coro_cctx {
41 int refcnt; /* pointer reference counter */ 113 struct coro_cctx *next;
42 int usecnt; /* shared by how many coroutines */
43 int gencnt; /* generation counter */
44 114
45 coro_context cctx; 115 /* the stack */
46
47 void *sptr; 116 void *sptr;
48 long ssize; /* positive == mmap, otherwise malloc */ 117 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
50 118
119 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
121 JMPENV *top_env;
122 coro_context cctx;
123
124#if USE_VALGRIND
125 int valgrind_id;
126#endif
127} coro_cctx;
128
129/* this is a structure representing a perl-level coroutine */
51struct coro { 130struct coro {
52 /* the optional C context */ 131 /* the c coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 132 coro_cctx *cctx;
54 void *cursp; 133
134 /* data associated with this coroutine (initial args) */
135 AV *args;
55 int gencnt; 136 int refcnt;
56 137
57 /* optionally saved, might be zero */ 138 /* optionally saved, might be zero */
58 AV *defav; 139 AV *defav;
59 SV *defsv; 140 SV *defsv;
60 SV *errsv; 141 SV *errsv;
61 142
62 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
63 U8 dowarn; 144# include "state.h"
64 I32 in_eval; 145#undef VAR
65 146
66 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
67 PERL_SI *curstackinfo; 148 int prio;
68 AV *curstack;
69 AV *mainstack;
70 SV **stack_sp;
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93
94 /* data associated with this coroutine (initial args) */
95 AV *args;
96}; 149};
97 150
98typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
100 153
101static AV *main_mainstack; /* used to differentiate between $main and others */ 154static AV *
102static HV *coro_state_stash; 155coro_clone_padlist (CV *cv)
103static SV *ucoro_state_sv;
104static U32 ucoro_state_hash;
105static HV *padlist_cache;
106
107/* mostly copied from op.c:cv_clone2 */
108STATIC AV *
109clone_padlist (AV *protopadlist)
110{ 156{
111 AV *av; 157 AV *padlist = CvPADLIST (cv);
112 I32 ix;
113 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115 SV **pname = AvARRAY (protopad_name);
116 SV **ppad = AvARRAY (protopad);
117 I32 fname = AvFILLp (protopad_name);
118 I32 fpad = AvFILLp (protopad);
119 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
120 SV **npad;
121
122 newpad_name = newAV ();
123 for (ix = fname; ix >= 0; ix--)
124 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126 newpad = newAV ();
127 av_fill (newpad, AvFILLp (protopad));
128 npad = AvARRAY (newpad);
129 159
130 newpadlist = newAV (); 160 newpadlist = newAV ();
131 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
132 av_store (newpadlist, 0, (SV *) newpad_name); 162#if PERL_VERSION_ATLEAST (5,9,0)
163 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#endif
167 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
168 --AvFILLp (padlist);
169
170 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
133 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
134 172
135 av = newAV (); /* will be @_ */ 173 return newpadlist;
136 av_extend (av, 0); 174}
137 av_store (newpad, 0, (SV *) av);
138 AvFLAGS (av) = AVf_REIFY;
139 175
140 for (ix = fpad; ix > 0; ix--) 176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
141 { 181 {
142 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 182 I32 i = AvFILLp (padlist);
143 if (namesv && namesv != &PL_sv_undef) 183 while (i >= 0)
144 { 184 {
145 char *name = SvPVX (namesv); /* XXX */ 185 SV **svp = av_fetch (padlist, i--, FALSE);
146 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 186 if (svp)
147 { /* lexical from outside? */
148 npad[ix] = SvREFCNT_inc (ppad[ix]);
149 } 187 {
150 else
151 { /* our own lexical */
152 SV *sv; 188 SV *sv;
153 if (*name == '&') 189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154 sv = SvREFCNT_inc (ppad[ix]); 190 SvREFCNT_dec (sv);
155 else if (*name == '@') 191
156 sv = (SV *) newAV (); 192 SvREFCNT_dec (*svp);
157 else if (*name == '%')
158 sv = (SV *) newHV ();
159 else
160 sv = NEWSV (0, 0);
161 if (!SvPADBUSY (sv))
162 SvPADMY_on (sv);
163 npad[ix] = sv;
164 } 193 }
165 } 194 }
166 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 195
167 { 196 SvREFCNT_dec ((SV*)padlist);
168 npad[ix] = SvREFCNT_inc (ppad[ix]);
169 }
170 else
171 {
172 SV *sv = NEWSV (0, 0);
173 SvPADTMP_on (sv);
174 npad[ix] = sv;
175 }
176 } 197 }
198}
177 199
178#if 0 /* return -ENOTUNDERSTOOD */ 200static int
179 /* Now that vars are all in place, clone nested closures. */ 201coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
202{
203 AV *padlist;
204 AV *av = (AV *)mg->mg_obj;
180 205
181 for (ix = fpad; ix > 0; ix--) { 206 /* casting is fun. */
182 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
183 if (namesv 208 free_padlist (padlist);
184 && namesv != &PL_sv_undef 209
185 && !(SvFLAGS(namesv) & SVf_FAKE) 210 SvREFCNT_dec (av);
186 && *SvPVX(namesv) == '&' 211
187 && CvCLONE(ppad[ix])) 212 return 0;
188 { 213}
189 CV *kid = cv_clone((CV*)ppad[ix]); 214
190 SvREFCNT_dec(ppad[ix]); 215#define PERL_MAGIC_coro PERL_MAGIC_ext
191 CvCLONE_on(kid); 216
192 SvPADMY_on(kid); 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
193 npad[ix] = (SV*)kid; 218
194 } 219#define CORO_MAGIC(cv) \
220 SvMAGIC (cv) \
221 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
222 ? SvMAGIC (cv) \
223 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
224 : 0
225
226/* the next two functions merely cache the padlists */
227static void
228get_padlist (CV *cv)
229{
230 MAGIC *mg = CORO_MAGIC (cv);
231 AV *av;
232
233 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235 else
236 {
237#if 0
238 /* this is probably cleaner, but also slower? */
239 CV *cp = Perl_cv_clone (cv);
240 CvPADLIST (cv) = CvPADLIST (cp);
241 CvPADLIST (cp) = 0;
242 SvREFCNT_dec (cp);
243#else
244 CvPADLIST (cv) = coro_clone_padlist (cv);
245#endif
246 }
247}
248
249static void
250put_padlist (CV *cv)
251{
252 MAGIC *mg = CORO_MAGIC (cv);
253 AV *av;
254
255 if (!mg)
256 {
257 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259 mg->mg_virtual = &vtbl_coro;
260 mg->mg_obj = (SV *)newAV ();
195 } 261 }
196#endif
197 262
198 return newpadlist; 263 av = (AV *)mg->mg_obj;
199}
200 264
201#ifdef MAY_FLUSH 265 if (AvFILLp (av) >= AvMAX (av))
202STATIC void 266 av_extend (av, AvMAX (av) + 1);
203free_padlist (AV *padlist)
204{
205 /* may be during global destruction */
206 if (SvREFCNT(padlist))
207 {
208 I32 i = AvFILLp(padlist);
209 while (i >= 0)
210 {
211 SV **svp = av_fetch(padlist, i--, FALSE);
212 SV *sv = svp ? *svp : Nullsv;
213 if (sv)
214 SvREFCNT_dec(sv);
215 }
216 267
217 SvREFCNT_dec((SV*)padlist); 268 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
218 }
219} 269}
220#endif
221
222/* the next two functions merely cache the padlists */
223STATIC void
224get_padlist (CV *cv)
225{
226 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228 if (he && AvFILLp ((AV *)*he) >= 0)
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230 else
231 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232}
233
234STATIC void
235put_padlist (CV *cv)
236{
237 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239 if (SvTYPE (*he) != SVt_PVAV)
240 {
241 SvREFCNT_dec (*he);
242 *he = (SV *)newAV ();
243 }
244
245 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246}
247
248#ifdef MAY_FLUSH
249STATIC void
250flush_padlist_cache ()
251{
252 HV *hv = padlist_cache;
253 padlist_cache = newHV ();
254
255 if (hv_iterinit (hv))
256 {
257 HE *he;
258 AV *padlist;
259
260 while (!!(he = hv_iternext (hv)))
261 {
262 AV *av = (AV *)HeVAL(he);
263
264 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (padlist);
267 }
268 }
269
270 SvREFCNT_dec (hv);
271}
272#endif
273 270
274#define SB do { 271#define SB do {
275#define SE } while (0) 272#define SE } while (0)
276 273
277#define LOAD(state) load_state(aTHX_ (state)); 274#define LOAD(state) load_state((state));
278#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 275#define SAVE(state,flags) save_state((state),(flags));
279 276
280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 277#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
281 278
282static void 279static void
283load_state(pTHX_ Coro__State c) 280load_state(Coro__State c)
284{ 281{
285 PL_dowarn = c->dowarn; 282#define VAR(name,type) PL_ ## name = c->name;
286 PL_in_eval = c->in_eval; 283# include "state.h"
287 284#undef VAR
288 PL_curstackinfo = c->curstackinfo;
289 PL_curstack = c->curstack;
290 PL_mainstack = c->mainstack;
291 PL_stack_sp = c->stack_sp;
292 PL_op = c->op;
293 PL_curpad = c->curpad;
294 PL_stack_base = c->stack_base;
295 PL_stack_max = c->stack_max;
296 PL_tmps_stack = c->tmps_stack;
297 PL_tmps_floor = c->tmps_floor;
298 PL_tmps_ix = c->tmps_ix;
299 PL_tmps_max = c->tmps_max;
300 PL_markstack = c->markstack;
301 PL_markstack_ptr = c->markstack_ptr;
302 PL_markstack_max = c->markstack_max;
303 PL_scopestack = c->scopestack;
304 PL_scopestack_ix = c->scopestack_ix;
305 PL_scopestack_max = c->scopestack_max;
306 PL_savestack = c->savestack;
307 PL_savestack_ix = c->savestack_ix;
308 PL_savestack_max = c->savestack_max;
309 PL_retstack = c->retstack;
310 PL_retstack_ix = c->retstack_ix;
311 PL_retstack_max = c->retstack_max;
312 PL_curcop = c->curcop;
313 PL_top_env = c->top_env;
314 285
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 286 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 287 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 288 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318 289
… …
321 CV *cv; 292 CV *cv;
322 293
323 /* now do the ugly restore mess */ 294 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs)) 295 while ((cv = (CV *)POPs))
325 { 296 {
326 AV *padlist = (AV *)POPs;
327
328 if (padlist)
329 {
330 put_padlist (cv); /* mark this padlist as available */ 297 put_padlist (cv); /* mark this padlist as available */
331 CvPADLIST(cv) = padlist; 298 CvDEPTH (cv) = PTR2IV (POPs);
332#ifdef USE_THREADS 299 CvPADLIST (cv) = (AV *)POPs;
333 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334#endif
335 }
336
337 ++CvDEPTH(cv);
338 } 300 }
339 301
340 PUTBACK; 302 PUTBACK;
341 } 303 }
342} 304}
343 305
344static void 306static void
345save_state(pTHX_ Coro__State c, int flags) 307save_state(Coro__State c, int flags)
346{ 308{
347 { 309 {
348 dSP; 310 dSP;
349 I32 cxix = cxstack_ix; 311 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 312 PERL_CONTEXT *ccstk = cxstack;
… …
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 326 PERL_CONTEXT *cx = &ccstk[cxix--];
365 327
366 if (CxTYPE(cx) == CXt_SUB) 328 if (CxTYPE(cx) == CXt_SUB)
367 { 329 {
368 CV *cv = cx->blk_sub.cv; 330 CV *cv = cx->blk_sub.cv;
331
369 if (CvDEPTH(cv)) 332 if (CvDEPTH (cv))
370 { 333 {
371#ifdef USE_THREADS
372 /*XPUSHs ((SV *)CvOWNER(cv));*/
373 /*CvOWNER(cv) = 0;*/
374 /*error must unlock this cv etc.. etc...*/
375#endif
376 EXTEND (SP, CvDEPTH(cv)*2); 334 EXTEND (SP, 3);
377
378 while (--CvDEPTH(cv))
379 {
380 /* this tells the restore code to increment CvDEPTH */
381 PUSHs (Nullsv);
382 PUSHs ((SV *)cv);
383 }
384 335
385 PUSHs ((SV *)CvPADLIST(cv)); 336 PUSHs ((SV *)CvPADLIST(cv));
337 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
386 PUSHs ((SV *)cv); 338 PUSHs ((SV *)cv);
387 339
340 CvDEPTH (cv) = 0;
388 get_padlist (cv); /* this is a monster */ 341 get_padlist (cv);
389 } 342 }
390 } 343 }
344#ifdef CXt_FORMAT
391 else if (CxTYPE(cx) == CXt_FORMAT) 345 else if (CxTYPE(cx) == CXt_FORMAT)
392 { 346 {
393 /* I never used formats, so how should I know how these are implemented? */ 347 /* I never used formats, so how should I know how these are implemented? */
394 /* my bold guess is as a simple, plain sub... */ 348 /* my bold guess is as a simple, plain sub... */
395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 349 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396 } 350 }
351#endif
397 } 352 }
398 353
399 if (top_si->si_type == PERLSI_MAIN) 354 if (top_si->si_type == PERLSI_MAIN)
400 break; 355 break;
401 356
… …
409 364
410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 365 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 366 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 367 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413 368
414 c->dowarn = PL_dowarn; 369#define VAR(name,type)c->name = PL_ ## name;
415 c->in_eval = PL_in_eval; 370# include "state.h"
416 371#undef VAR
417 c->curstackinfo = PL_curstackinfo;
418 c->curstack = PL_curstack;
419 c->mainstack = PL_mainstack;
420 c->stack_sp = PL_stack_sp;
421 c->op = PL_op;
422 c->curpad = PL_curpad;
423 c->stack_base = PL_stack_base;
424 c->stack_max = PL_stack_max;
425 c->tmps_stack = PL_tmps_stack;
426 c->tmps_floor = PL_tmps_floor;
427 c->tmps_ix = PL_tmps_ix;
428 c->tmps_max = PL_tmps_max;
429 c->markstack = PL_markstack;
430 c->markstack_ptr = PL_markstack_ptr;
431 c->markstack_max = PL_markstack_max;
432 c->scopestack = PL_scopestack;
433 c->scopestack_ix = PL_scopestack_ix;
434 c->scopestack_max = PL_scopestack_max;
435 c->savestack = PL_savestack;
436 c->savestack_ix = PL_savestack_ix;
437 c->savestack_max = PL_savestack_max;
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441 c->curcop = PL_curcop;
442 c->top_env = PL_top_env;
443} 372}
444 373
445/* 374/*
446 * allocate various perl stacks. This is an exact copy 375 * allocate various perl stacks. This is an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 376 * of perl.c:init_stacks, except that it uses less memory
448 * on the assumption that coroutines do not usually need 377 * on the (sometimes correct) assumption that coroutines do
449 * a lot of stackspace. 378 * not usually need a lot of stackspace.
450 */ 379 */
451STATIC void 380static void
452coro_init_stacks (pTHX) 381coro_init_stacks ()
453{ 382{
454 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 383 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455 PL_curstackinfo->si_type = PERLSI_MAIN; 384 PL_curstackinfo->si_type = PERLSI_MAIN;
456 PL_curstack = PL_curstackinfo->si_stack; 385 PL_curstack = PL_curstackinfo->si_stack;
457 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
467 396
468 New(54,PL_markstack,16,I32); 397 New(54,PL_markstack,16,I32);
469 PL_markstack_ptr = PL_markstack; 398 PL_markstack_ptr = PL_markstack;
470 PL_markstack_max = PL_markstack + 16; 399 PL_markstack_max = PL_markstack + 16;
471 400
401#ifdef SET_MARK_OFFSET
472 SET_MARK_OFFSET; 402 SET_MARK_OFFSET;
403#endif
473 404
474 New(54,PL_scopestack,16,I32); 405 New(54,PL_scopestack,16,I32);
475 PL_scopestack_ix = 0; 406 PL_scopestack_ix = 0;
476 PL_scopestack_max = 16; 407 PL_scopestack_max = 16;
477 408
478 New(54,PL_savestack,96,ANY); 409 New(54,PL_savestack,96,ANY);
479 PL_savestack_ix = 0; 410 PL_savestack_ix = 0;
480 PL_savestack_max = 96; 411 PL_savestack_max = 96;
481 412
413#if !PERL_VERSION_ATLEAST (5,9,0)
482 New(54,PL_retstack,8,OP*); 414 New(54,PL_retstack,8,OP*);
483 PL_retstack_ix = 0; 415 PL_retstack_ix = 0;
484 PL_retstack_max = 8; 416 PL_retstack_max = 8;
417#endif
485} 418}
486 419
487/* 420/*
488 * destroy the stacks, the callchain etc... 421 * destroy the stacks, the callchain etc...
489 * still there is a memleak of 128 bytes...
490 */ 422 */
491STATIC void 423static void
492destroy_stacks(pTHX) 424coro_destroy_stacks ()
493{ 425{
494 if (!IN_DESTRUCT) 426 if (!IN_DESTRUCT)
495 { 427 {
496 /* is this ugly, I ask? */ 428 /* is this ugly, I ask? */
497 while (PL_scopestack_ix) 429 LEAVE_SCOPE (0);
498 LEAVE;
499 430
500 /* sure it is, but more important: is it correct?? :/ */ 431 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS; 432 FREETMPS;
433
434 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 } 435 }
504 436
505 while (PL_curstackinfo->si_next) 437 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 438 PL_curstackinfo = PL_curstackinfo->si_next;
507 439
508 while (PL_curstackinfo) 440 while (PL_curstackinfo)
509 { 441 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 442 PERL_SI *p = PL_curstackinfo->si_prev;
511 443
512 { 444 { /*D*//*remove*/
513 dSP; 445 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 446 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */ 447 PUTBACK; /* possibly superfluous */
516 } 448 }
517 449
518 if (!IN_DESTRUCT) 450 if (!IN_DESTRUCT)
519 { 451 {
520 dounwind(-1); 452 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 453 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 } 454 }
523 455
524 Safefree(PL_curstackinfo->si_cxstack); 456 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 457 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 458 PL_curstackinfo = p;
527 } 459 }
528 460
529 Safefree(PL_tmps_stack); 461 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 462 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 463 Safefree (PL_scopestack);
532 Safefree(PL_savestack); 464 Safefree (PL_savestack);
465#if !PERL_VERSION_ATLEAST (5,9,0)
533 Safefree(PL_retstack); 466 Safefree (PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#if HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif 467#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563} 468}
564 469
565static void 470static void
566deallocate_stack (Coro__State ctx) 471setup_coro (struct coro *coro)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{ 472{
593 /* 473 /*
594 * emulate part of the perl startup here. 474 * emulate part of the perl startup here.
595 */ 475 */
476
477 coro_init_stacks ();
478
479 PL_curcop = 0;
480 PL_in_eval = 0;
481 PL_curpm = 0;
482
483 {
484 dSP;
485 LOGOP myop;
486
487 /* I have no idea why this is needed, but it is */
488 PUSHMARK (SP);
489
490 SvREFCNT_dec (GvAV (PL_defgv));
491 GvAV (PL_defgv) = coro->args; coro->args = 0;
492
493 Zero (&myop, 1, LOGOP);
494 myop.op_next = Nullop;
495 myop.op_flags = OPf_WANT_VOID;
496
497 PL_op = (OP *)&myop;
498
499 PUSHMARK (SP);
500 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501 PUTBACK;
502 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503 SPAGAIN;
504
505 ENTER; /* necessary e.g. for dounwind */
506 }
507}
508
509static void
510free_coro_mortal ()
511{
512 if (coro_mortal)
513 {
514 SvREFCNT_dec (coro_mortal);
515 coro_mortal = 0;
516 }
517}
518
519static void NOINLINE
520prepare_cctx (coro_cctx *cctx)
521{
596 dSP; 522 dSP;
597 Coro__State ctx = (Coro__State)arg; 523 LOGOP myop;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 524
600 coro_init_stacks (aTHX); 525 Zero (&myop, 1, LOGOP);
601 /*PL_curcop = 0;*/ 526 myop.op_next = PL_op;
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 527 myop.op_flags = OPf_WANT_VOID;
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 528
529 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530
531 PUSHMARK (SP);
532 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533 PUTBACK;
534 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
606 SPAGAIN; 535 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP);
613 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616 if (SvTRUE (ERRSV))
617 croak (NULL);
618 else
619 croak ("FATAL: CCTXT coroutine returned!");
620 }
621 else
622 {
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646} 536}
647 537
648static void 538static void
649continue_coro (void *arg) 539coro_run (void *arg)
650{ 540{
541 /* coro_run is the alternative epilogue of transfer() */
542 UNLOCK;
543
651 /* 544 /*
652 * this is a _very_ stripped down perl interpreter ;) 545 * this is a _very_ stripped down perl interpreter ;)
653 */ 546 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env; 547 PL_top_env = &PL_start_env;
662 548
663 ctx->cursp = 0; 549 /* inject call to cctx_init */
664 PL_op = PL_op->op_next; 550 prepare_cctx ((coro_cctx *)arg);
665 CALLRUNOPS(aTHX);
666 551
552 /* somebody will hit me for both perl_run and PL_restartop */
553 perl_run (PL_curinterp);
554
555 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
667 abort (); 556 abort ();
668} 557}
669 558
670STATIC void 559static coro_cctx *
560cctx_new ()
561{
562 coro_cctx *cctx;
563
564 ++cctx_count;
565
566 New (0, cctx, 1, coro_cctx);
567
568#if HAVE_MMAP
569
570 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
571 /* mmap suppsedly does allocate-on-write for us */
572 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573
574 if (cctx->sptr == (void *)-1)
575 {
576 perror ("FATAL: unable to mmap stack for coroutine");
577 _exit (EXIT_FAILURE);
578 }
579
580# if STACKGUARD
581 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
582# endif
583
584#else
585
586 cctx->ssize = STACKSIZE * (long)sizeof (long);
587 New (0, cctx->sptr, STACKSIZE, long);
588
589 if (!cctx->sptr)
590 {
591 perror ("FATAL: unable to malloc stack for coroutine");
592 _exit (EXIT_FAILURE);
593 }
594
595#endif
596
597#if USE_VALGRIND
598 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600 cctx->ssize + (char *)cctx->sptr
601 );
602#endif
603
604 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
605
606 return cctx;
607}
608
609static void
610cctx_free (coro_cctx *cctx)
611{
612 if (!cctx)
613 return;
614
615 --cctx_count;
616
617#if USE_VALGRIND
618 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619#endif
620
621#if HAVE_MMAP
622 munmap (cctx->sptr, cctx->ssize);
623#else
624 Safefree (cctx->sptr);
625#endif
626
627 Safefree (cctx);
628}
629
630static coro_cctx *
631cctx_get ()
632{
633 coro_cctx *cctx;
634
635 if (cctx_first)
636 {
637 --cctx_idle;
638 cctx = cctx_first;
639 cctx_first = cctx->next;
640 }
641 else
642 {
643 cctx = cctx_new ();
644 PL_op = PL_op->op_next;
645 }
646
647 return cctx;
648}
649
650static void
651cctx_put (coro_cctx *cctx)
652{
653 ++cctx_idle;
654 cctx->next = cctx_first;
655 cctx_first = cctx;
656}
657
658/* never call directly, always through the coro_state_transfer global variable */
659static void NOINLINE
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 660transfer (struct coro *prev, struct coro *next, int flags)
672{ 661{
673 dSTACKLEVEL; 662 dSTACKLEVEL;
674 static struct coro *xnext;
675 663
664 /* sometimes transfer is only called to set idle_sp */
665 if (flags == TRANSFER_SET_STACKLEVEL)
666 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
676 if (prev != next) 667 else if (prev != next)
677 { 668 {
678 xnext = next; 669 coro_cctx *prev__cctx;
670
671 LOCK;
679 672
680 if (next->mainstack) 673 if (next->mainstack)
681 { 674 {
675 /* coroutine already started */
682 SAVE (prev, flags); 676 SAVE (prev, flags);
683 LOAD (next); 677 LOAD (next);
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 {
692 if (!prev->stack)
693 allocate_stack (prev, 0);
694 else if (prev->cursp != stacklevel
695 && prev->stack->usecnt > 1)
696 {
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 }
714
715 } 678 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else 679 else
719 { 680 {
681 /* need to start coroutine */
720 SAVE (prev, -1); /* first get rid of the old state */ 682 /* first get rid of the old state */
721 683 SAVE (prev, -1);
722 if (flags & TRANSFER_SAVE_CCTXT) 684 /* setup coroutine call */
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 {
729 setup_coro (next);
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 }
746 else
747 setup_coro (next); 685 setup_coro (next);
686 /* need a stack */
687 next->cctx = 0;
748 } 688 }
749 689
750 /* 690 if (!prev->cctx)
751 * xnext is now either prev or next, depending on wether 691 /* create a new empty context */
752 * we switched the c stack or not. that's why i use a global 692 Newz (0, prev->cctx, 1, coro_cctx);
753 * variable, that should become thread-specific at one point. 693
694 prev__cctx = prev->cctx;
695
696 /* possibly "free" the cctx */
697 if (prev__cctx->idle_sp == STACKLEVEL)
754 */ 698 {
755 xnext->cursp = stacklevel; 699 assert (PL_top_env == prev__cctx->top_env);//D
700 cctx_put (prev__cctx);
701 prev->cctx = 0;
702 }
703
704 if (!next->cctx)
705 next->cctx = cctx_get ();
706
707 if (prev__cctx != next->cctx)
708 {
709 prev__cctx->top_env = PL_top_env;
710 PL_top_env = next->cctx->top_env;
711 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712 }
713
714 free_coro_mortal ();
715
716 UNLOCK;
756 } 717 }
757} 718}
758 719
720struct transfer_args
721{
722 struct coro *prev, *next;
723 int flags;
724};
725
726#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
727
728static void
729coro_state_destroy (struct coro *coro)
730{
731 if (coro->refcnt--)
732 return;
733
734 if (coro->mainstack && coro->mainstack != main_mainstack)
735 {
736 struct coro temp;
737
738 SAVE ((&temp), TRANSFER_SAVE_ALL);
739 LOAD (coro);
740
741 coro_destroy_stacks ();
742
743 LOAD ((&temp)); /* this will get rid of defsv etc.. */
744
745 coro->mainstack = 0;
746 }
747
748 cctx_free (coro->cctx);
749 SvREFCNT_dec (coro->args);
750 Safefree (coro);
751}
752
753static int
754coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
755{
756 struct coro *coro = (struct coro *)mg->mg_ptr;
757 mg->mg_ptr = 0;
758
759 coro_state_destroy (coro);
760
761 return 0;
762}
763
764static int
765coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766{
767 struct coro *coro = (struct coro *)mg->mg_ptr;
768
769 ++coro->refcnt;
770
771 return 0;
772}
773
774static MGVTBL coro_state_vtbl = {
775 0, 0, 0, 0,
776 coro_state_clear,
777 0,
778#ifdef MGf_DUP
779 coro_state_dup,
780#else
781# define MGf_DUP 0
782#endif
783};
784
759static struct coro * 785static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname) 786SvSTATE (SV *coro)
761{ 787{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 788 HV *stash;
789 MAGIC *mg;
790
791 if (SvROK (coro))
792 coro = SvRV (coro);
793
794 stash = SvSTASH (coro);
795 if (stash != coro_stash && stash != coro_state_stash)
763 { 796 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 797 /* very slow, but rare, check */
765 798 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
766 if (!he) 799 croak ("Coro::State object required");
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 } 800 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776 801
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 802 mg = SvMAGIC (coro);
778 /*NORETURN*/ 803 assert (mg->mg_type == PERL_MAGIC_ext);
804 return (struct coro *)mg->mg_ptr;
779} 805}
780 806
781static void 807static void
808prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
809{
810 ta->prev = SvSTATE (prev);
811 ta->next = SvSTATE (next);
812 ta->flags = flags;
813}
814
815static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags) 816api_transfer (SV *prev, SV *next, int flags)
783{ 817{
784 transfer(aTHX_ 818 dTHX;
785 sv_to_coro (prev, "Coro::transfer", "prev"), 819 struct transfer_args ta;
786 sv_to_coro (next, "Coro::transfer", "next"), 820
787 flags); 821 prepare_transfer (&ta, prev, next, flags);
822 TRANSFER (ta);
788} 823}
789 824
790/** Coro ********************************************************************/ 825/** Coro ********************************************************************/
791 826
792#define PRIO_MAX 3 827#define PRIO_MAX 3
… …
796#define PRIO_IDLE -3 831#define PRIO_IDLE -3
797#define PRIO_MIN -4 832#define PRIO_MIN -4
798 833
799/* for Coro.pm */ 834/* for Coro.pm */
800static GV *coro_current, *coro_idle; 835static GV *coro_current, *coro_idle;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 836static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802static int coro_nready; 837static int coro_nready;
803 838
804static void 839static void
805coro_enq (SV *sv) 840coro_enq (SV *sv)
806{ 841{
807 if (SvROK (sv)) 842 int prio;
808 { 843
809 SV *hv = SvRV (sv);
810 if (SvTYPE (hv) == SVt_PVHV) 844 if (SvTYPE (sv) != SVt_PVHV)
811 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815 prio = prio > PRIO_MAX ? PRIO_MAX
816 : prio < PRIO_MIN ? PRIO_MIN
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 }
824 }
825
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 845 croak ("Coro::ready tried to enqueue something that is not a coroutine");
846
847 prio = SvSTATE (sv)->prio;
848
849 av_push (coro_ready [prio - PRIO_MIN], sv);
850 coro_nready++;
827} 851}
828 852
829static SV * 853static SV *
830coro_deq (int min_prio) 854coro_deq (int min_prio)
831{ 855{
… …
834 min_prio -= PRIO_MIN; 858 min_prio -= PRIO_MIN;
835 if (min_prio < 0) 859 if (min_prio < 0)
836 min_prio = 0; 860 min_prio = 0;
837 861
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 862 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839 if (av_len (coro_ready[prio]) >= 0) 863 if (AvFILLp (coro_ready [prio]) >= 0)
840 { 864 {
841 coro_nready--; 865 coro_nready--;
842 return av_shift (coro_ready[prio]); 866 return av_shift (coro_ready [prio]);
843 } 867 }
844 868
845 return 0; 869 return 0;
846} 870}
847 871
848static void 872static void
849api_ready (SV *coro) 873api_ready (SV *coro)
850{ 874{
875 dTHX;
876
877 if (SvROK (coro))
878 coro = SvRV (coro);
879
880 LOCK;
851 coro_enq (SvREFCNT_inc (coro)); 881 coro_enq (SvREFCNT_inc (coro));
882 UNLOCK;
852} 883}
853 884
854static void 885static void
855api_schedule (int cede) 886prepare_schedule (struct transfer_args *ta)
856{ 887{
857 SV *prev, *next; 888 SV *current, *prev, *next;
858 889
859 prev = GvSV (coro_current); 890 current = GvSV (coro_current);
860 891
861 if (cede) 892 for (;;)
862 coro_enq (SvREFCNT_inc (prev)); 893 {
863 894 LOCK;
864 next = coro_deq (PRIO_MIN); 895 next = coro_deq (PRIO_MIN);
896 UNLOCK;
865 897
866 if (!next) 898 if (next)
867 next = SvREFCNT_inc (GvSV (coro_idle)); 899 break;
868 900
869 GvSV (coro_current) = SvREFCNT_inc (next); 901 {
870 transfer (aTHX_ 902 dSP;
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 903
872 sv_to_coro (next, "Coro::schedule", "next coroutine"), 904 ENTER;
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 905 SAVETMPS;
874 SvREFCNT_dec (next); 906
875 SvREFCNT_dec (prev); 907 PUSHMARK (SP);
908 PUTBACK;
909 call_sv (GvSV (coro_idle), G_DISCARD);
910
911 FREETMPS;
912 LEAVE;
913 }
914 }
915
916 prev = SvRV (current);
917 SvRV (current) = next;
918
919 /* free this only after the transfer */
920 LOCK;
921 free_coro_mortal ();
922 UNLOCK;
923 coro_mortal = prev;
924
925 ta->prev = SvSTATE (prev);
926 ta->next = SvSTATE (next);
927 ta->flags = TRANSFER_SAVE_ALL;
928}
929
930static void
931prepare_cede (struct transfer_args *ta)
932{
933 LOCK;
934 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935 UNLOCK;
936
937 prepare_schedule (ta);
938}
939
940static void
941api_schedule (void)
942{
943 dTHX;
944 struct transfer_args ta;
945
946 prepare_schedule (&ta);
947 TRANSFER (ta);
948}
949
950static void
951api_cede (void)
952{
953 dTHX;
954 struct transfer_args ta;
955
956 prepare_cede (&ta);
957 TRANSFER (ta);
876} 958}
877 959
878MODULE = Coro::State PACKAGE = Coro::State 960MODULE = Coro::State PACKAGE = Coro::State
879 961
880PROTOTYPES: ENABLE 962PROTOTYPES: DISABLE
881 963
882BOOT: 964BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 965{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 966#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 967 MUTEX_INIT (&coro_mutex);
968#endif
969 BOOT_PAGESIZE;
970
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 971 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 972
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 976
896 main_mainstack = PL_mainstack; 977 main_mainstack = PL_mainstack;
897 978
898 coroapi.ver = CORO_API_VERSION; 979 coroapi.ver = CORO_API_VERSION;
899 coroapi.transfer = api_transfer; 980 coroapi.transfer = api_transfer;
900}
901 981
902Coro::State 982 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903_newprocess(args) 983}
904 SV * args 984
905 PROTOTYPE: $ 985SV *
986new (char *klass, ...)
906 CODE: 987 CODE:
907 Coro__State coro; 988{
989 struct coro *coro;
990 HV *hv;
991 int i;
908 992
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910 croak ("Coro::State::_newprocess expects an arrayref");
911
912 New (0, coro, 1, struct coro); 993 Newz (0, coro, 1, struct coro);
994 coro->args = newAV ();
913 995
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 996 hv = newHV ();
915 coro->mainstack = 0; /* actual work is done inside transfer */ 997 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
916 coro->stack = 0; 998 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
917 999
918 RETVAL = coro; 1000 for (i = 1; i < items; i++)
1001 av_push (coro->args, newSVsv (ST (i)));
1002}
919 OUTPUT: 1003 OUTPUT:
920 RETVAL 1004 RETVAL
921 1005
922void 1006void
923transfer(prev, next, flags) 1007_set_stacklevel (...)
924 Coro::State_or_hashref prev 1008 ALIAS:
925 Coro::State_or_hashref next 1009 Coro::State::transfer = 1
926 int flags 1010 Coro::schedule = 2
927 PROTOTYPE: @ 1011 Coro::cede = 3
1012 Coro::Cont::yield = 4
928 CODE: 1013 CODE:
929 PUTBACK; 1014{
930 transfer (aTHX_ prev, next, flags); 1015 struct transfer_args ta;
931 SPAGAIN; 1016
1017 switch (ix)
1018 {
1019 case 0:
1020 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1021 ta.next = 0;
1022 ta.flags = TRANSFER_SET_STACKLEVEL;
1023 break;
1024
1025 case 1:
1026 if (items != 3)
1027 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1028
1029 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1030 break;
1031
1032 case 2:
1033 prepare_schedule (&ta);
1034 break;
1035
1036 case 3:
1037 prepare_cede (&ta);
1038 break;
1039
1040 case 4:
1041 {
1042 SV *yieldstack;
1043 SV *sv;
1044 AV *defav = GvAV (PL_defgv);
1045
1046 yieldstack = *hv_fetch (
1047 (HV *)SvRV (GvSV (coro_current)),
1048 "yieldstack", sizeof ("yieldstack") - 1,
1049 0
1050 );
1051
1052 /* set up @_ -- ugly */
1053 av_clear (defav);
1054 av_fill (defav, items - 1);
1055 while (items--)
1056 av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058 sv = av_pop ((AV *)SvRV (yieldstack));
1059 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1060 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1061 ta.flags = 0;
1062 SvREFCNT_dec (sv);
1063 }
1064 break;
1065
1066 }
1067
1068 TRANSFER (ta);
1069}
932 1070
933void 1071void
934DESTROY(coro) 1072_clone_state_from (SV *dst, SV *src)
935 Coro::State coro 1073 CODE:
936 CODE: 1074{
1075 struct coro *coro_src = SvSTATE (src);
937 1076
938 if (coro->mainstack && coro->mainstack != main_mainstack) 1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
939 {
940 struct coro temp;
941 1078
942 PUTBACK; 1079 ++coro_src->refcnt;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1080 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
944 LOAD(aTHX_ coro); 1081}
945 SPAGAIN;
946
947 destroy_stacks (aTHX);
948
949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
951
952 coro->mainstack = 0;
953 }
954
955 deallocate_stack (coro);
956
957 Safefree (coro);
958 1082
959void 1083void
960flush()
961 CODE:
962#ifdef MAY_FLUSH
963 flush_padlist_cache ();
964#endif
965
966void
967_exit(code) 1084_exit (code)
968 int code 1085 int code
969 PROTOTYPE: $ 1086 PROTOTYPE: $
970 CODE: 1087 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE
972 _exit (code); 1088 _exit (code);
973#else
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 1089
979MODULE = Coro::State PACKAGE = Coro::Cont 1090int
1091cctx_count ()
1092 CODE:
1093 RETVAL = cctx_count;
1094 OUTPUT:
1095 RETVAL
980 1096
981# this is slightly dirty (should expose a c-level api) 1097int
982 1098cctx_idle ()
983void 1099 CODE:
984yield(...) 1100 RETVAL = cctx_idle;
985 PROTOTYPE: @ 1101 OUTPUT:
986 CODE: 1102 RETVAL
987 static SV *returnstk;
988 SV *sv;
989 AV *defav = GvAV (PL_defgv);
990 struct coro *prev, *next;
991
992 if (!returnstk)
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv);
1006
1007 transfer(aTHX_ prev, next, 0);
1008 1103
1009MODULE = Coro::State PACKAGE = Coro 1104MODULE = Coro::State PACKAGE = Coro
1010 1105
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 1106BOOT:
1014{ 1107{
1015 int i; 1108 int i;
1109
1016 HV *stash = gv_stashpv ("Coro", TRUE); 1110 coro_stash = gv_stashpv ("Coro", TRUE);
1017 1111
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1112 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1113 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1114 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1115 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1116 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1117 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024 1118
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1119 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1120 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027 1121
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1122 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
… …
1030 1124
1031 { 1125 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 1126 SV *sv = perl_get_sv("Coro::API", 1);
1033 1127
1034 coroapi.schedule = api_schedule; 1128 coroapi.schedule = api_schedule;
1129 coroapi.cede = api_cede;
1035 coroapi.ready = api_ready; 1130 coroapi.ready = api_ready;
1036 coroapi.nready = &coro_nready; 1131 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current; 1132 coroapi.current = coro_current;
1038 1133
1039 GCoroAPI = &coroapi; 1134 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi); 1135 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 1136 SvREADONLY_on (sv);
1042 } 1137 }
1043} 1138}
1044 1139
1140int
1141prio (Coro::State coro, int newprio = 0)
1142 ALIAS:
1143 nice = 1
1144 CODE:
1145{
1146 RETVAL = coro->prio;
1147
1148 if (items > 1)
1149 {
1150 if (ix)
1151 newprio += coro->prio;
1152
1153 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155
1156 coro->prio = newprio;
1157 }
1158}
1159
1045void 1160void
1046ready(self) 1161ready (SV *self)
1047 SV * self
1048 PROTOTYPE: $ 1162 PROTOTYPE: $
1049 CODE: 1163 CODE:
1050 api_ready (self); 1164 api_ready (self);
1051 1165
1052int 1166int
1053nready(...) 1167nready (...)
1054 PROTOTYPE: 1168 PROTOTYPE:
1055 CODE: 1169 CODE:
1056 RETVAL = coro_nready; 1170 RETVAL = coro_nready;
1057 OUTPUT: 1171 OUTPUT:
1058 RETVAL 1172 RETVAL
1059 1173
1174MODULE = Coro::State PACKAGE = Coro::AIO
1175
1176SV *
1177_get_state ()
1178 CODE:
1179{
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT:
1195 RETVAL
1196
1060void 1197void
1061schedule(...) 1198_set_state (char *data_)
1062 PROTOTYPE: 1199 PROTOTYPE: $
1063 ALIAS:
1064 cede = 1
1065 CODE: 1200 CODE:
1066 api_schedule (ix); 1201{
1202 struct {
1203 int errorno;
1204 int laststype;
1205 int laststatval;
1206 Stat_t statcache;
1207 } *data = (void *)data_;
1067 1208
1209 errno = data->errorno;
1210 PL_laststype = data->laststype;
1211 PL_laststatval = data->laststatval;
1212 PL_statcache = data->statcache;
1213}

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