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Comparing Coro/Coro/State.xs (file contents):
Revision 1.38 by root, Wed Nov 7 00:21:06 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 /* TODO: PL_pmop might be nice && effortless to save. */
62 142
63 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
64 U8 dowarn; 144# include "state.h"
65 I32 in_eval; 145#undef VAR
66 146
67 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
68 PERL_SI *curstackinfo; 148 int prio;
69 AV *curstack;
70 AV *mainstack;
71 SV **stack_sp;
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV *top_env;
94
95 /* data associated with this coroutine (initial args) */
96 AV *args;
97}; 149};
98 150
99typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
101 153
102static AV *main_mainstack; /* used to differentiate between $main and others */ 154static AV *
103static HV *coro_state_stash; 155coro_clone_padlist (CV *cv)
104static SV *ucoro_state_sv;
105static U32 ucoro_state_hash;
106static HV *padlist_cache;
107
108/* mostly copied from op.c:cv_clone2 */
109STATIC AV *
110clone_padlist (AV *protopadlist)
111{ 156{
112 AV *av; 157 AV *padlist = CvPADLIST (cv);
113 I32 ix;
114 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
115 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
116 SV **pname = AvARRAY (protopad_name);
117 SV **ppad = AvARRAY (protopad);
118 I32 fname = AvFILLp (protopad_name);
119 I32 fpad = AvFILLp (protopad);
120 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
121 SV **npad;
122
123 newpad_name = newAV ();
124 for (ix = fname; ix >= 0; ix--)
125 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127 newpad = newAV ();
128 av_fill (newpad, AvFILLp (protopad));
129 npad = AvARRAY (newpad);
130 159
131 newpadlist = newAV (); 160 newpadlist = newAV ();
132 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
133 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)));
134 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
135 172
136 av = newAV (); /* will be @_ */ 173 return newpadlist;
137 av_extend (av, 0); 174}
138 av_store (newpad, 0, (SV *) av);
139 AvFLAGS (av) = AVf_REIFY;
140 175
141 for (ix = fpad; ix > 0; ix--) 176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
142 { 181 {
143 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 182 I32 i = AvFILLp (padlist);
144 if (namesv && namesv != &PL_sv_undef) 183 while (i >= 0)
145 { 184 {
146 char *name = SvPVX (namesv); /* XXX */ 185 SV **svp = av_fetch (padlist, i--, FALSE);
147 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 186 if (svp)
148 { /* lexical from outside? */
149 npad[ix] = SvREFCNT_inc (ppad[ix]);
150 } 187 {
151 else
152 { /* our own lexical */
153 SV *sv; 188 SV *sv;
154 if (*name == '&') 189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
155 sv = SvREFCNT_inc (ppad[ix]); 190 SvREFCNT_dec (sv);
156 else if (*name == '@') 191
157 sv = (SV *) newAV (); 192 SvREFCNT_dec (*svp);
158 else if (*name == '%')
159 sv = (SV *) newHV ();
160 else
161 sv = NEWSV (0, 0);
162 if (!SvPADBUSY (sv))
163 SvPADMY_on (sv);
164 npad[ix] = sv;
165 } 193 }
166 } 194 }
167 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 195
168 { 196 SvREFCNT_dec ((SV*)padlist);
169 npad[ix] = SvREFCNT_inc (ppad[ix]);
170 }
171 else
172 {
173 SV *sv = NEWSV (0, 0);
174 SvPADTMP_on (sv);
175 npad[ix] = sv;
176 }
177 } 197 }
198}
178 199
179#if 0 /* return -ENOTUNDERSTOOD */ 200static int
180 /* 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;
181 205
182 for (ix = fpad; ix > 0; ix--) { 206 /* casting is fun. */
183 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
184 if (namesv 208 free_padlist (padlist);
185 && namesv != &PL_sv_undef 209
186 && !(SvFLAGS(namesv) & SVf_FAKE) 210 SvREFCNT_dec (av);
187 && *SvPVX(namesv) == '&' 211
188 && CvCLONE(ppad[ix])) 212 return 0;
189 { 213}
190 CV *kid = cv_clone((CV*)ppad[ix]); 214
191 SvREFCNT_dec(ppad[ix]); 215#define PERL_MAGIC_coro PERL_MAGIC_ext
192 CvCLONE_on(kid); 216
193 SvPADMY_on(kid); 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
194 npad[ix] = (SV*)kid; 218
195 } 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 ();
196 } 261 }
197#endif
198 262
199 return newpadlist; 263 av = (AV *)mg->mg_obj;
200}
201 264
202#ifdef MAY_FLUSH 265 if (AvFILLp (av) >= AvMAX (av))
203STATIC void 266 av_extend (av, AvMAX (av) + 1);
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT(padlist))
208 {
209 I32 i = AvFILLp(padlist);
210 while (i >= 0)
211 {
212 SV **svp = av_fetch(padlist, i--, FALSE);
213 SV *sv = svp ? *svp : Nullsv;
214 if (sv)
215 SvREFCNT_dec(sv);
216 }
217 267
218 SvREFCNT_dec((SV*)padlist); 268 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
219 }
220} 269}
221#endif
222
223/* the next two functions merely cache the padlists */
224STATIC void
225get_padlist (CV *cv)
226{
227 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
228
229 if (he && AvFILLp ((AV *)*he) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
231 else
232 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233}
234
235STATIC void
236put_padlist (CV *cv)
237{
238 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
239
240 if (SvTYPE (*he) != SVt_PVAV)
241 {
242 SvREFCNT_dec (*he);
243 *he = (SV *)newAV ();
244 }
245
246 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
247}
248
249#ifdef MAY_FLUSH
250STATIC void
251flush_padlist_cache ()
252{
253 HV *hv = padlist_cache;
254 padlist_cache = newHV ();
255
256 if (hv_iterinit (hv))
257 {
258 HE *he;
259 AV *padlist;
260
261 while (!!(he = hv_iternext (hv)))
262 {
263 AV *av = (AV *)HeVAL(he);
264
265 /* casting is fun. */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267 free_padlist (padlist);
268 }
269 }
270
271 SvREFCNT_dec (hv);
272}
273#endif
274 270
275#define SB do { 271#define SB do {
276#define SE } while (0) 272#define SE } while (0)
277 273
278#define LOAD(state) load_state(aTHX_ (state)); 274#define LOAD(state) load_state((state));
279#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 275#define SAVE(state,flags) save_state((state),(flags));
280 276
281#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
282 278
283static void 279static void
284load_state(pTHX_ Coro__State c) 280load_state(Coro__State c)
285{ 281{
286 PL_dowarn = c->dowarn; 282#define VAR(name,type) PL_ ## name = c->name;
287 PL_in_eval = c->in_eval; 283# include "state.h"
288 284#undef VAR
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_top_env = c->top_env;
315 285
316 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 286 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
317 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 287 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
318 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 288 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
319 289
… …
322 CV *cv; 292 CV *cv;
323 293
324 /* now do the ugly restore mess */ 294 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs)) 295 while ((cv = (CV *)POPs))
326 { 296 {
327 AV *padlist = (AV *)POPs;
328
329 if (padlist)
330 {
331 put_padlist (cv); /* mark this padlist as available */ 297 put_padlist (cv); /* mark this padlist as available */
332 CvPADLIST(cv) = padlist; 298 CvDEPTH (cv) = PTR2IV (POPs);
333#ifdef USE_THREADS 299 CvPADLIST (cv) = (AV *)POPs;
334 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
335#endif
336 }
337
338 ++CvDEPTH(cv);
339 } 300 }
340 301
341 PUTBACK; 302 PUTBACK;
342 } 303 }
343} 304}
344 305
345static void 306static void
346save_state(pTHX_ Coro__State c, int flags) 307save_state(Coro__State c, int flags)
347{ 308{
348 { 309 {
349 dSP; 310 dSP;
350 I32 cxix = cxstack_ix; 311 I32 cxix = cxstack_ix;
351 PERL_CONTEXT *ccstk = cxstack; 312 PERL_CONTEXT *ccstk = cxstack;
… …
365 PERL_CONTEXT *cx = &ccstk[cxix--]; 326 PERL_CONTEXT *cx = &ccstk[cxix--];
366 327
367 if (CxTYPE(cx) == CXt_SUB) 328 if (CxTYPE(cx) == CXt_SUB)
368 { 329 {
369 CV *cv = cx->blk_sub.cv; 330 CV *cv = cx->blk_sub.cv;
331
370 if (CvDEPTH(cv)) 332 if (CvDEPTH (cv))
371 { 333 {
372#ifdef USE_THREADS
373 /*XPUSHs ((SV *)CvOWNER(cv));*/
374 /*CvOWNER(cv) = 0;*/
375 /*error must unlock this cv etc.. etc...*/
376#endif
377 EXTEND (SP, CvDEPTH(cv)*2); 334 EXTEND (SP, 3);
378
379 while (--CvDEPTH(cv))
380 {
381 /* this tells the restore code to increment CvDEPTH */
382 PUSHs (Nullsv);
383 PUSHs ((SV *)cv);
384 }
385 335
386 PUSHs ((SV *)CvPADLIST(cv)); 336 PUSHs ((SV *)CvPADLIST(cv));
337 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
387 PUSHs ((SV *)cv); 338 PUSHs ((SV *)cv);
388 339
340 CvDEPTH (cv) = 0;
389 get_padlist (cv); /* this is a monster */ 341 get_padlist (cv);
390 } 342 }
391 } 343 }
344#ifdef CXt_FORMAT
392 else if (CxTYPE(cx) == CXt_FORMAT) 345 else if (CxTYPE(cx) == CXt_FORMAT)
393 { 346 {
394 /* 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? */
395 /* my bold guess is as a simple, plain sub... */ 348 /* my bold guess is as a simple, plain sub... */
396 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");
397 } 350 }
351#endif
398 } 352 }
399 353
400 if (top_si->si_type == PERLSI_MAIN) 354 if (top_si->si_type == PERLSI_MAIN)
401 break; 355 break;
402 356
… …
410 364
411 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;
412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 366 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
413 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 367 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
414 368
415 c->dowarn = PL_dowarn; 369#define VAR(name,type)c->name = PL_ ## name;
416 c->in_eval = PL_in_eval; 370# include "state.h"
417 371#undef VAR
418 c->curstackinfo = PL_curstackinfo;
419 c->curstack = PL_curstack;
420 c->mainstack = PL_mainstack;
421 c->stack_sp = PL_stack_sp;
422 c->op = PL_op;
423 c->curpad = PL_curpad;
424 c->stack_base = PL_stack_base;
425 c->stack_max = PL_stack_max;
426 c->tmps_stack = PL_tmps_stack;
427 c->tmps_floor = PL_tmps_floor;
428 c->tmps_ix = PL_tmps_ix;
429 c->tmps_max = PL_tmps_max;
430 c->markstack = PL_markstack;
431 c->markstack_ptr = PL_markstack_ptr;
432 c->markstack_max = PL_markstack_max;
433 c->scopestack = PL_scopestack;
434 c->scopestack_ix = PL_scopestack_ix;
435 c->scopestack_max = PL_scopestack_max;
436 c->savestack = PL_savestack;
437 c->savestack_ix = PL_savestack_ix;
438 c->savestack_max = PL_savestack_max;
439 c->retstack = PL_retstack;
440 c->retstack_ix = PL_retstack_ix;
441 c->retstack_max = PL_retstack_max;
442 c->curcop = PL_curcop;
443 c->top_env = PL_top_env;
444} 372}
445 373
446/* 374/*
447 * allocate various perl stacks. This is an exact copy 375 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 376 * of perl.c:init_stacks, except that it uses less memory
449 * on the assumption that coroutines do not usually need 377 * on the (sometimes correct) assumption that coroutines do
450 * a lot of stackspace. 378 * not usually need a lot of stackspace.
451 */ 379 */
452STATIC void 380static void
453coro_init_stacks (pTHX) 381coro_init_stacks ()
454{ 382{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 383 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 384 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 385 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
468 396
469 New(54,PL_markstack,16,I32); 397 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 398 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 399 PL_markstack_max = PL_markstack + 16;
472 400
401#ifdef SET_MARK_OFFSET
473 SET_MARK_OFFSET; 402 SET_MARK_OFFSET;
403#endif
474 404
475 New(54,PL_scopestack,16,I32); 405 New(54,PL_scopestack,16,I32);
476 PL_scopestack_ix = 0; 406 PL_scopestack_ix = 0;
477 PL_scopestack_max = 16; 407 PL_scopestack_max = 16;
478 408
479 New(54,PL_savestack,96,ANY); 409 New(54,PL_savestack,96,ANY);
480 PL_savestack_ix = 0; 410 PL_savestack_ix = 0;
481 PL_savestack_max = 96; 411 PL_savestack_max = 96;
482 412
413#if !PERL_VERSION_ATLEAST (5,9,0)
483 New(54,PL_retstack,8,OP*); 414 New(54,PL_retstack,8,OP*);
484 PL_retstack_ix = 0; 415 PL_retstack_ix = 0;
485 PL_retstack_max = 8; 416 PL_retstack_max = 8;
417#endif
486} 418}
487 419
488/* 420/*
489 * destroy the stacks, the callchain etc... 421 * destroy the stacks, the callchain etc...
490 * still there is a memleak of 128 bytes...
491 */ 422 */
492STATIC void 423static void
493destroy_stacks(pTHX) 424coro_destroy_stacks ()
494{ 425{
495 if (!IN_DESTRUCT) 426 if (!IN_DESTRUCT)
496 { 427 {
497 /* is this ugly, I ask? */ 428 /* is this ugly, I ask? */
498 while (PL_scopestack_ix) 429 LEAVE_SCOPE (0);
499 LEAVE;
500 430
501 /* sure it is, but more important: is it correct?? :/ */ 431 /* sure it is, but more important: is it correct?? :/ */
502 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503 FREETMPS; 432 FREETMPS;
433
434 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 } 435 }
505 436
506 while (PL_curstackinfo->si_next) 437 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 438 PL_curstackinfo = PL_curstackinfo->si_next;
508 439
509 while (PL_curstackinfo) 440 while (PL_curstackinfo)
510 { 441 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 442 PERL_SI *p = PL_curstackinfo->si_prev;
512 443
513 { 444 { /*D*//*remove*/
514 dSP; 445 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 446 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */ 447 PUTBACK; /* possibly superfluous */
517 } 448 }
518 449
519 if (!IN_DESTRUCT) 450 if (!IN_DESTRUCT)
520 { 451 {
521 dounwind(-1); 452 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 453 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 } 454 }
524 455
525 Safefree(PL_curstackinfo->si_cxstack); 456 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree(PL_curstackinfo); 457 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 458 PL_curstackinfo = p;
528 } 459 }
529 460
530 Safefree(PL_tmps_stack); 461 Safefree (PL_tmps_stack);
531 Safefree(PL_markstack); 462 Safefree (PL_markstack);
532 Safefree(PL_scopestack); 463 Safefree (PL_scopestack);
533 Safefree(PL_savestack); 464 Safefree (PL_savestack);
465#if !PERL_VERSION_ATLEAST (5,9,0)
534 Safefree(PL_retstack); 466 Safefree (PL_retstack);
535}
536
537static void
538allocate_stack (Coro__State ctx, int alloc)
539{
540 coro_stack *stack;
541
542 New (0, stack, 1, coro_stack);
543
544 stack->refcnt = 1;
545 stack->usecnt = 1;
546 stack->gencnt = ctx->gencnt = 0;
547 if (alloc)
548 {
549#if HAVE_MMAP
550 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552 if (stack->sptr == (void *)-1)
553#endif 467#endif
554 {
555 /*FIXME*//*D*//* reasonable stack size! */
556 stack->ssize = -4096 * sizeof (long);
557 New (0, stack->sptr, 4096, long);
558 }
559 }
560 else
561 stack->sptr = 0;
562
563 ctx->stack = stack;
564} 468}
565 469
566static void 470static void
567deallocate_stack (Coro__State ctx) 471setup_coro (struct coro *coro)
568{
569 coro_stack *stack = ctx->stack;
570
571 ctx->stack = 0;
572
573 if (stack)
574 {
575 if (!--stack->refcnt)
576 {
577#ifdef HAVE_MMAP
578 if (stack->ssize > 0 && stack->sptr)
579 munmap (stack->sptr, stack->ssize);
580 else
581#else
582 Safefree (stack->sptr);
583#endif
584 Safefree (stack);
585 }
586 else if (ctx->gencnt == stack->gencnt)
587 --stack->usecnt;
588 }
589}
590
591static void
592setup_coro (void *arg)
593{ 472{
594 /* 473 /*
595 * emulate part of the perl startup here. 474 * emulate part of the perl startup here.
596 */ 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{
597 dSP; 522 dSP;
598 Coro__State ctx = (Coro__State)arg; 523 LOGOP myop;
599 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
600 524
601 coro_init_stacks (aTHX); 525 Zero (&myop, 1, LOGOP);
602 /*PL_curcop = 0;*/ 526 myop.op_next = PL_op;
603 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 527 myop.op_flags = OPf_WANT_VOID;
604 SvREFCNT_dec (GvAV (PL_defgv));
605 GvAV (PL_defgv) = ctx->args;
606 528
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);
607 SPAGAIN; 535 SPAGAIN;
608
609 if (ctx->stack)
610 {
611 ctx->cursp = 0;
612
613 PUSHMARK(SP);
614 PUTBACK;
615 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
616
617 if (SvTRUE (ERRSV))
618 croak (NULL);
619 else
620 croak ("FATAL: CCTXT coroutine returned!");
621 }
622 else
623 {
624 UNOP myop;
625
626 PL_op = (OP *)&myop;
627
628 Zero(&myop, 1, UNOP);
629 myop.op_next = Nullop;
630 myop.op_flags = OPf_WANT_VOID;
631
632 PUSHMARK(SP);
633 XPUSHs (sub_init);
634 /*
635 * the next line is slightly wrong, as PL_op->op_next
636 * is actually being executed so we skip the first op.
637 * that doesn't matter, though, since it is only
638 * pp_nextstate and we never return...
639 * ah yes, and I don't care anyways ;)
640 */
641 PUTBACK;
642 PL_op = pp_entersub();
643 SPAGAIN;
644
645 ENTER; /* necessary e.g. for dounwind */
646 }
647} 536}
648 537
649static void 538static void
650continue_coro (void *arg) 539coro_run (void *arg)
651{ 540{
541 /* coro_run is the alternative epilogue of transfer() */
542 UNLOCK;
543
652 /* 544 /*
653 * this is a _very_ stripped down perl interpreter ;) 545 * this is a _very_ stripped down perl interpreter ;)
654 */ 546 */
655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
657
658 /* same as JMPENV_BOOTSTRAP */
659 Zero(&coro_start_env, 1, JMPENV);
660 coro_start_env.je_ret = -1;
661 coro_start_env.je_mustcatch = TRUE;
662 PL_top_env = &coro_start_env; 547 PL_top_env = &PL_start_env;
663 548
664 ctx->cursp = 0; 549 /* inject call to cctx_init */
665 PL_op = PL_op->op_next; 550 prepare_cctx ((coro_cctx *)arg);
666 CALLRUNOPS(aTHX);
667 551
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);
668 abort (); 556 abort ();
669} 557}
670 558
671STATIC 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
672transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 660transfer (struct coro *prev, struct coro *next, int flags)
673{ 661{
674 dSTACKLEVEL; 662 dSTACKLEVEL;
675 static struct coro *xnext;
676 663
664 /* sometimes transfer is only called to set idle_sp */
665 if (flags == TRANSFER_SET_STACKLEVEL)
666 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
677 if (prev != next) 667 else if (prev != next)
678 { 668 {
679 xnext = next; 669 coro_cctx *prev__cctx;
670
671 LOCK;
680 672
681 if (next->mainstack) 673 if (next->mainstack)
682 { 674 {
675 /* coroutine already started */
683 SAVE (prev, flags); 676 SAVE (prev, flags);
684 LOAD (next); 677 LOAD (next);
685
686 /* mark this state as in-use */
687 next->mainstack = 0;
688 next->tmps_ix = -2;
689
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 {
693 if (!prev->stack)
694 allocate_stack (prev, 0);
695 else if (prev->cursp != stacklevel
696 && prev->stack->usecnt > 1)
697 {
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
714 }
715
716 } 678 }
717 else if (next->tmps_ix == -2)
718 croak ("tried to transfer to running coroutine");
719 else 679 else
720 { 680 {
681 /* need to start coroutine */
721 SAVE (prev, -1); /* first get rid of the old state */ 682 /* first get rid of the old state */
722 683 SAVE (prev, -1);
723 if (flags & TRANSFER_SAVE_CCTXT) 684 /* setup coroutine call */
724 {
725 if (!prev->stack)
726 allocate_stack (prev, 0);
727
728 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729 {
730 setup_coro (next);
731
732 prev->stack->refcnt++;
733 prev->stack->usecnt++;
734 next->stack = prev->stack;
735 next->gencnt = prev->gencnt;
736 }
737 else
738 {
739 allocate_stack (next, 1);
740 coro_create (&(next->stack->cctx),
741 setup_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
745 }
746 }
747 else
748 setup_coro (next); 685 setup_coro (next);
686 /* need a stack */
687 next->cctx = 0;
749 } 688 }
750 689
751 /* 690 if (!prev->cctx)
752 * xnext is now either prev or next, depending on wether 691 /* create a new empty context */
753 * we switched the c stack or not. that's why i use a global 692 Newz (0, prev->cctx, 1, coro_cctx);
754 * 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)
755 */ 698 {
756 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;
757 } 717 }
758} 718}
759 719
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
760static struct coro * 785static struct coro *
761sv_to_coro (SV *arg, const char *funcname, const char *varname) 786SvSTATE (SV *coro)
762{ 787{
763 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)
764 { 796 {
765 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 797 /* very slow, but rare, check */
766 798 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
767 if (!he) 799 croak ("Coro::State object required");
768 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
769
770 arg = HeVAL(he);
771 } 800 }
772
773 /* must also be changed inside Coro::Cont::yield */
774 if (SvROK(arg) && SvOBJECT(SvRV(arg))
775 && SvSTASH(SvRV(arg)) == coro_state_stash)
776 return (struct coro *) SvIV((SV*)SvRV(arg));
777 801
778 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 802 mg = SvMAGIC (coro);
779 /*NORETURN*/ 803 assert (mg->mg_type == PERL_MAGIC_ext);
804 return (struct coro *)mg->mg_ptr;
780} 805}
781 806
782static 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
783api_transfer(pTHX_ SV *prev, SV *next, int flags) 816api_transfer (SV *prev, SV *next, int flags)
784{ 817{
785 transfer(aTHX_ 818 dTHX;
786 sv_to_coro (prev, "Coro::transfer", "prev"), 819 struct transfer_args ta;
787 sv_to_coro (next, "Coro::transfer", "next"), 820
788 flags); 821 prepare_transfer (&ta, prev, next, flags);
822 TRANSFER (ta);
789} 823}
790 824
791/** Coro ********************************************************************/ 825/** Coro ********************************************************************/
792 826
793#define PRIO_MAX 3 827#define PRIO_MAX 3
… …
797#define PRIO_IDLE -3 831#define PRIO_IDLE -3
798#define PRIO_MIN -4 832#define PRIO_MIN -4
799 833
800/* for Coro.pm */ 834/* for Coro.pm */
801static GV *coro_current, *coro_idle; 835static GV *coro_current, *coro_idle;
802static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 836static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
803static int coro_nready; 837static int coro_nready;
804 838
805static void 839static void
806coro_enq (SV *sv) 840coro_enq (SV *sv)
807{ 841{
808 if (SvROK (sv)) 842 int prio;
809 { 843
810 SV *hv = SvRV (sv);
811 if (SvTYPE (hv) == SVt_PVHV) 844 if (SvTYPE (sv) != SVt_PVHV)
812 {
813 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
814 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
815
816 prio = prio > PRIO_MAX ? PRIO_MAX
817 : prio < PRIO_MIN ? PRIO_MIN
818 : prio;
819
820 av_push (coro_ready [prio - PRIO_MIN], sv);
821 coro_nready++;
822
823 return;
824 }
825 }
826
827 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++;
828} 851}
829 852
830static SV * 853static SV *
831coro_deq (int min_prio) 854coro_deq (int min_prio)
832{ 855{
… …
835 min_prio -= PRIO_MIN; 858 min_prio -= PRIO_MIN;
836 if (min_prio < 0) 859 if (min_prio < 0)
837 min_prio = 0; 860 min_prio = 0;
838 861
839 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 862 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
840 if (av_len (coro_ready[prio]) >= 0) 863 if (AvFILLp (coro_ready [prio]) >= 0)
841 { 864 {
842 coro_nready--; 865 coro_nready--;
843 return av_shift (coro_ready[prio]); 866 return av_shift (coro_ready [prio]);
844 } 867 }
845 868
846 return 0; 869 return 0;
847} 870}
848 871
849static void 872static void
850api_ready (SV *coro) 873api_ready (SV *coro)
851{ 874{
875 dTHX;
876
877 if (SvROK (coro))
878 coro = SvRV (coro);
879
880 LOCK;
852 coro_enq (SvREFCNT_inc (coro)); 881 coro_enq (SvREFCNT_inc (coro));
882 UNLOCK;
853} 883}
854 884
855static void 885static void
856api_schedule (int cede) 886prepare_schedule (struct transfer_args *ta)
857{ 887{
858 SV *prev, *next; 888 SV *current, *prev, *next;
859 889
860 prev = GvSV (coro_current); 890 current = GvSV (coro_current);
861 891
862 if (cede) 892 for (;;)
863 coro_enq (SvREFCNT_inc (prev)); 893 {
864 894 LOCK;
865 next = coro_deq (PRIO_MIN); 895 next = coro_deq (PRIO_MIN);
896 UNLOCK;
866 897
867 if (!next) 898 if (next)
868 next = SvREFCNT_inc (GvSV (coro_idle)); 899 break;
869 900
870 GvSV (coro_current) = SvREFCNT_inc (next); 901 {
871 transfer (aTHX_ 902 dSP;
872 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 903
873 sv_to_coro (next, "Coro::schedule", "next coroutine"), 904 ENTER;
874 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 905 SAVETMPS;
875 SvREFCNT_dec (next); 906
876 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);
877} 958}
878 959
879MODULE = Coro::State PACKAGE = Coro::State 960MODULE = Coro::State PACKAGE = Coro::State
880 961
881PROTOTYPES: ENABLE 962PROTOTYPES: DISABLE
882 963
883BOOT: 964BOOT:
884{ /* {} necessary for stoopid perl-5.6.x */ 965{
885 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 966#ifdef USE_ITHREADS
886 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 967 MUTEX_INIT (&coro_mutex);
968#endif
969 BOOT_PAGESIZE;
970
887 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 971 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
888 972
889 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
890 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
891 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
892 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
893
894 if (!padlist_cache)
895 padlist_cache = newHV ();
896 976
897 main_mainstack = PL_mainstack; 977 main_mainstack = PL_mainstack;
898 978
899 coroapi.ver = CORO_API_VERSION; 979 coroapi.ver = CORO_API_VERSION;
900 coroapi.transfer = api_transfer; 980 coroapi.transfer = api_transfer;
901}
902 981
903Coro::State 982 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
904_newprocess(args) 983}
905 SV * args 984
906 PROTOTYPE: $ 985SV *
986new (char *klass, ...)
907 CODE: 987 CODE:
908 Coro__State coro; 988{
989 struct coro *coro;
990 HV *hv;
991 int i;
909 992
910 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
911 croak ("Coro::State::_newprocess expects an arrayref");
912
913 New (0, coro, 1, struct coro); 993 Newz (0, coro, 1, struct coro);
994 coro->args = newAV ();
914 995
915 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 996 hv = newHV ();
916 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;
917 coro->stack = 0; 998 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
918 999
919 RETVAL = coro; 1000 for (i = 1; i < items; i++)
1001 av_push (coro->args, newSVsv (ST (i)));
1002}
920 OUTPUT: 1003 OUTPUT:
921 RETVAL 1004 RETVAL
922 1005
923void 1006void
924transfer(prev, next, flags) 1007_set_stacklevel (...)
925 Coro::State_or_hashref prev 1008 ALIAS:
926 Coro::State_or_hashref next 1009 Coro::State::transfer = 1
927 int flags 1010 Coro::schedule = 2
928 PROTOTYPE: @ 1011 Coro::cede = 3
1012 Coro::Cont::yield = 4
929 CODE: 1013 CODE:
930 PUTBACK; 1014{
931 transfer (aTHX_ prev, next, flags); 1015 struct transfer_args ta;
932 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}
933 1070
934void 1071void
935DESTROY(coro) 1072_clone_state_from (SV *dst, SV *src)
936 Coro::State coro 1073 CODE:
937 CODE: 1074{
1075 struct coro *coro_src = SvSTATE (src);
938 1076
939 if (coro->mainstack && coro->mainstack != main_mainstack) 1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
940 {
941 struct coro temp;
942 1078
943 PUTBACK; 1079 ++coro_src->refcnt;
944 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;
945 LOAD(aTHX_ coro); 1081}
946 SPAGAIN;
947
948 destroy_stacks (aTHX);
949
950 LOAD((&temp)); /* this will get rid of defsv etc.. */
951 SPAGAIN;
952
953 coro->mainstack = 0;
954 }
955
956 deallocate_stack (coro);
957
958 Safefree (coro);
959 1082
960void 1083void
961flush()
962 CODE:
963#ifdef MAY_FLUSH
964 flush_padlist_cache ();
965#endif
966
967void
968_exit(code) 1084_exit (code)
969 int code 1085 int code
970 PROTOTYPE: $ 1086 PROTOTYPE: $
971 CODE: 1087 CODE:
972#if defined(__GLIBC__) || _POSIX_C_SOURCE
973 _exit (code); 1088 _exit (code);
974#else
975 signal (SIGTERM, SIG_DFL);
976 raise (SIGTERM);
977 exit (code);
978#endif
979 1089
980MODULE = Coro::State PACKAGE = Coro::Cont 1090int
1091cctx_count ()
1092 CODE:
1093 RETVAL = cctx_count;
1094 OUTPUT:
1095 RETVAL
981 1096
982# this is slightly dirty (should expose a c-level api) 1097int
983 1098cctx_idle ()
984void 1099 CODE:
985yield(...) 1100 RETVAL = cctx_idle;
986 PROTOTYPE: @ 1101 OUTPUT:
987 CODE: 1102 RETVAL
988 static SV *returnstk;
989 SV *sv;
990 AV *defav = GvAV (PL_defgv);
991 struct coro *prev, *next;
992
993 if (!returnstk)
994 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
995
996 /* set up @_ -- ugly */
997 av_clear (defav);
998 av_fill (defav, items - 1);
999 while (items--)
1000 av_store (defav, items, SvREFCNT_inc (ST(items)));
1001
1002 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1003 sv = av_pop ((AV *)SvRV (returnstk));
1004 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1005 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1006 SvREFCNT_dec (sv);
1007
1008 transfer(aTHX_ prev, next, 0);
1009 1103
1010MODULE = Coro::State PACKAGE = Coro 1104MODULE = Coro::State PACKAGE = Coro
1011 1105
1012# this is slightly dirty (should expose a c-level api)
1013
1014BOOT: 1106BOOT:
1015{ 1107{
1016 int i; 1108 int i;
1109
1017 HV *stash = gv_stashpv ("Coro", TRUE); 1110 coro_stash = gv_stashpv ("Coro", TRUE);
1018 1111
1019 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1112 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1020 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1113 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1021 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1114 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1022 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1115 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1023 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1116 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1024 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1117 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1025 1118
1026 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1119 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1027 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1120 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1028 1121
1029 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1122 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
… …
1031 1124
1032 { 1125 {
1033 SV *sv = perl_get_sv("Coro::API", 1); 1126 SV *sv = perl_get_sv("Coro::API", 1);
1034 1127
1035 coroapi.schedule = api_schedule; 1128 coroapi.schedule = api_schedule;
1129 coroapi.cede = api_cede;
1036 coroapi.ready = api_ready; 1130 coroapi.ready = api_ready;
1037 coroapi.nready = &coro_nready; 1131 coroapi.nready = &coro_nready;
1038 coroapi.current = coro_current; 1132 coroapi.current = coro_current;
1039 1133
1040 GCoroAPI = &coroapi; 1134 GCoroAPI = &coroapi;
1041 sv_setiv(sv, (IV)&coroapi); 1135 sv_setiv (sv, (IV)&coroapi);
1042 SvREADONLY_on(sv); 1136 SvREADONLY_on (sv);
1043 } 1137 }
1044} 1138}
1045 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
1046void 1160void
1047ready(self) 1161ready (SV *self)
1048 SV * self
1049 PROTOTYPE: $ 1162 PROTOTYPE: $
1050 CODE: 1163 CODE:
1051 api_ready (self); 1164 api_ready (self);
1052 1165
1053int 1166int
1054nready(...) 1167nready (...)
1055 PROTOTYPE: 1168 PROTOTYPE:
1056 CODE: 1169 CODE:
1057 RETVAL = coro_nready; 1170 RETVAL = coro_nready;
1058 OUTPUT: 1171 OUTPUT:
1059 RETVAL 1172 RETVAL
1060 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
1061void 1197void
1062schedule(...) 1198_set_state (char *data_)
1063 PROTOTYPE: 1199 PROTOTYPE: $
1064 ALIAS:
1065 cede = 1
1066 CODE: 1200 CODE:
1067 api_schedule (ix); 1201{
1202 struct {
1203 int errorno;
1204 int laststype;
1205 int laststatval;
1206 Stat_t statcache;
1207 } *data = (void *)data_;
1068 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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