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Comparing Coro/Coro/State.xs (file contents):
Revision 1.12 by root, Sun Jul 22 03:24:10 2001 UTC vs.
Revision 1.111 by root, Thu Nov 30 18:21:14 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#if 1 7#include "patchlevel.h"
6# define CHK(x) (void *)0 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
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
50
51#ifdef HAVE_MMAP
52# include <unistd.h>
53# include <sys/mman.h>
54# ifndef MAP_ANONYMOUS
55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# 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
68# endif
7#else 69#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 70# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0
9#endif 72#endif
10 73
11#define MAY_FLUSH /* increases codesize */ 74/* The next macro should declare a variable stacklevel that contains and approximation
75 * to the current C stack pointer. Its property is that it changes with each call
76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
78#define STACKLEVEL ((void *)&stacklevel)
12 79
13#define SUB_INIT "Coro::State::initialize" 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
14 81
15#define TRANSFER_SAVE_DEFAV 0x00000001 82#if __GNUC__ >= 3
16#define TRANSFER_SAVE_DEFSV 0x00000002 83# define attribute(x) __attribute__(x)
17#define TRANSFER_SAVE_ERRSV 0x00000004 84#else
85# define attribute(x)
86#endif
18 87
19#define TRANSFER_SAVE_ALL -1 88#define NOINLINE attribute ((noinline))
20 89
90#include "CoroAPI.h"
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
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 */
107
108static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle;
110
111/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx {
113 struct coro_cctx *next;
114
115 /* the stack */
116 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */
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 int inuse;
125
126#if USE_VALGRIND
127 int valgrind_id;
128#endif
129} coro_cctx;
130
131enum {
132 CF_RUNNING, /* coroutine is running */
133 CF_READY, /* coroutine is ready */
134};
135
136/* this is a structure representing a perl-level coroutine */
21struct coro { 137struct coro {
138 /* the c coroutine allocated to this perl coroutine, if any */
139 coro_cctx *cctx;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143 int refcnt;
144 int flags;
145
22 /* optionally saved, might be zero */ 146 /* optionally saved, might be zero */
23 AV *defav; 147 AV *defav;
24 SV *defsv; 148 SV *defsv;
25 SV *errsv; 149 SV *errsv;
26 150
27 /* saved global state not related to stacks */ 151#define VAR(name,type) type name;
28 U8 dowarn; 152# include "state.h"
153#undef VAR
29 154
30 /* the stacks and related info (callchain etc..) */ 155 /* coro process data */
31 PERL_SI *curstackinfo; 156 int prio;
32 AV *curstack;
33 AV *mainstack;
34 SV **stack_sp;
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56
57 /* data associated with this coroutine (initial args) */
58 AV *args;
59}; 157};
60 158
61typedef struct coro *Coro__State; 159typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 160typedef struct coro *Coro__State_or_hashref;
63 161
64static AV *main_mainstack; /* used to differentiate between $main and others */ 162static AV *
65 163coro_clone_padlist (CV *cv)
66static HV *padlist_cache;
67
68/* mostly copied from op.c:cv_clone2 */
69STATIC AV *
70clone_padlist (AV *protopadlist)
71{ 164{
72 AV *av; 165 AV *padlist = CvPADLIST (cv);
73 I32 ix;
74 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
75 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
76 SV **pname = AvARRAY (protopad_name);
77 SV **ppad = AvARRAY (protopad);
78 I32 fname = AvFILLp (protopad_name);
79 I32 fpad = AvFILLp (protopad);
80 AV *newpadlist, *newpad_name, *newpad; 166 AV *newpadlist, *newpad;
81 SV **npad;
82
83 newpad_name = newAV ();
84 for (ix = fname; ix >= 0; ix--)
85 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
86
87 newpad = newAV ();
88 av_fill (newpad, AvFILLp (protopad));
89 npad = AvARRAY (newpad);
90 167
91 newpadlist = newAV (); 168 newpadlist = newAV ();
92 AvREAL_off (newpadlist); 169 AvREAL_off (newpadlist);
93 av_store (newpadlist, 0, (SV *) newpad_name); 170#if PERL_VERSION_ATLEAST (5,9,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist);
177
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
94 av_store (newpadlist, 1, (SV *) newpad); 179 av_store (newpadlist, 1, (SV *)newpad);
95 180
96 av = newAV (); /* will be @_ */ 181 return newpadlist;
97 av_extend (av, 0); 182}
98 av_store (newpad, 0, (SV *) av);
99 AvFLAGS (av) = AVf_REIFY;
100 183
101 for (ix = fpad; ix > 0; ix--) 184static void
185free_padlist (AV *padlist)
186{
187 /* may be during global destruction */
188 if (SvREFCNT (padlist))
102 { 189 {
103 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 190 I32 i = AvFILLp (padlist);
104 if (namesv && namesv != &PL_sv_undef) 191 while (i >= 0)
105 { 192 {
106 char *name = SvPVX (namesv); /* XXX */ 193 SV **svp = av_fetch (padlist, i--, FALSE);
107 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 194 if (svp)
108 { /* lexical from outside? */
109 npad[ix] = SvREFCNT_inc (ppad[ix]);
110 } 195 {
111 else
112 { /* our own lexical */
113 SV *sv; 196 SV *sv;
114 if (*name == '&') 197 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
115 sv = SvREFCNT_inc (ppad[ix]); 198 SvREFCNT_dec (sv);
116 else if (*name == '@') 199
117 sv = (SV *) newAV (); 200 SvREFCNT_dec (*svp);
118 else if (*name == '%')
119 sv = (SV *) newHV ();
120 else
121 sv = NEWSV (0, 0);
122 if (!SvPADBUSY (sv))
123 SvPADMY_on (sv);
124 npad[ix] = sv;
125 } 201 }
126 } 202 }
127 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 203
128 { 204 SvREFCNT_dec ((SV*)padlist);
129 npad[ix] = SvREFCNT_inc (ppad[ix]);
130 }
131 else
132 {
133 SV *sv = NEWSV (0, 0);
134 SvPADTMP_on (sv);
135 npad[ix] = sv;
136 }
137 } 205 }
206}
138 207
139#if 0 /* return -ENOTUNDERSTOOD */ 208static int
140 /* Now that vars are all in place, clone nested closures. */ 209coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
210{
211 AV *padlist;
212 AV *av = (AV *)mg->mg_obj;
141 213
142 for (ix = fpad; ix > 0; ix--) { 214 /* casting is fun. */
143 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
144 if (namesv 216 free_padlist (padlist);
145 && namesv != &PL_sv_undef 217
146 && !(SvFLAGS(namesv) & SVf_FAKE) 218 SvREFCNT_dec (av);
147 && *SvPVX(namesv) == '&' 219
148 && CvCLONE(ppad[ix])) 220 return 0;
149 { 221}
150 CV *kid = cv_clone((CV*)ppad[ix]); 222
151 SvREFCNT_dec(ppad[ix]); 223#define PERL_MAGIC_coro PERL_MAGIC_ext
152 CvCLONE_on(kid); 224
153 SvPADMY_on(kid); 225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
154 npad[ix] = (SV*)kid; 226
155 } 227#define CORO_MAGIC(cv) \
228 SvMAGIC (cv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230 ? SvMAGIC (cv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
232 : 0
233
234/* the next two functions merely cache the padlists */
235static void
236get_padlist (CV *cv)
237{
238 MAGIC *mg = CORO_MAGIC (cv);
239 AV *av;
240
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else
244 {
245#if 0
246 /* this is probably cleaner, but also slower? */
247 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp);
251#else
252 CvPADLIST (cv) = coro_clone_padlist (cv);
253#endif
254 }
255}
256
257static void
258put_padlist (CV *cv)
259{
260 MAGIC *mg = CORO_MAGIC (cv);
261 AV *av;
262
263 if (!mg)
264 {
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
156 } 269 }
157#endif
158 270
159 return newpadlist; 271 av = (AV *)mg->mg_obj;
160}
161 272
162#ifdef MAY_FLUSH 273 if (AvFILLp (av) >= AvMAX (av))
163STATIC AV * 274 av_extend (av, AvMAX (av) + 1);
164free_padlist (AV *padlist)
165{
166 /* may be during global destruction */
167 if (SvREFCNT(padlist))
168 {
169 I32 i = AvFILLp(padlist);
170 while (i >= 0)
171 {
172 SV **svp = av_fetch(padlist, i--, FALSE);
173 SV *sv = svp ? *svp : Nullsv;
174 if (sv)
175 SvREFCNT_dec(sv);
176 }
177 275
178 SvREFCNT_dec((SV*)padlist); 276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
179 }
180} 277}
181#endif
182
183/* the next two functions merely cache the padlists */
184STATIC void
185get_padlist (CV *cv)
186{
187 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
188
189 if (he && AvFILLp ((AV *)*he) >= 0)
190 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
191 else
192 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
193}
194
195STATIC void
196put_padlist (CV *cv)
197{
198 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
199
200 if (SvTYPE (*he) != SVt_PVAV)
201 {
202 SvREFCNT_dec (*he);
203 *he = (SV *)newAV ();
204 }
205
206 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
207}
208
209#ifdef MAY_FLUSH
210STATIC void
211flush_padlist_cache ()
212{
213 HV *hv = padlist_cache;
214 padlist_cache = newHV ();
215
216 if (hv_iterinit (hv))
217 {
218 HE *he;
219 AV *padlist;
220
221 while (!!(he = hv_iternext (hv)))
222 {
223 AV *av = (AV *)HeVAL(he);
224
225 /* casting is fun. */
226 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
227 free_padlist (padlist);
228 }
229 }
230
231 SvREFCNT_dec (hv);
232}
233#endif
234 278
235#define SB do { 279#define SB do {
236#define SE } while (0) 280#define SE } while (0)
237 281
238#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE 282#define LOAD(state) load_state((state));
239#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE 283#define SAVE(state,flags) save_state((state),(flags));
240 284
241#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
242 286
243static void 287static void
244load_state(pTHX_ Coro__State c) 288load_state(Coro__State c)
245{ 289{
246 PL_dowarn = c->dowarn; 290#define VAR(name,type) PL_ ## name = c->name;
247 291# include "state.h"
248 PL_curstackinfo = c->curstackinfo; 292#undef VAR
249 PL_curstack = c->curstack;
250 PL_mainstack = c->mainstack;
251 PL_stack_sp = c->stack_sp;
252 PL_op = c->op;
253 PL_curpad = c->curpad;
254 PL_stack_base = c->stack_base;
255 PL_stack_max = c->stack_max;
256 PL_tmps_stack = c->tmps_stack;
257 PL_tmps_floor = c->tmps_floor;
258 PL_tmps_ix = c->tmps_ix;
259 PL_tmps_max = c->tmps_max;
260 PL_markstack = c->markstack;
261 PL_markstack_ptr = c->markstack_ptr;
262 PL_markstack_max = c->markstack_max;
263 PL_scopestack = c->scopestack;
264 PL_scopestack_ix = c->scopestack_ix;
265 PL_scopestack_max = c->scopestack_max;
266 PL_savestack = c->savestack;
267 PL_savestack_ix = c->savestack_ix;
268 PL_savestack_max = c->savestack_max;
269 PL_retstack = c->retstack;
270 PL_retstack_ix = c->retstack_ix;
271 PL_retstack_max = c->retstack_max;
272 PL_curcop = c->curcop;
273 293
274 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
275 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
276 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
277 297
… …
280 CV *cv; 300 CV *cv;
281 301
282 /* now do the ugly restore mess */ 302 /* now do the ugly restore mess */
283 while ((cv = (CV *)POPs)) 303 while ((cv = (CV *)POPs))
284 { 304 {
285 AV *padlist = (AV *)POPs;
286
287 if (padlist)
288 {
289 put_padlist (cv); /* mark this padlist as available */ 305 put_padlist (cv); /* mark this padlist as available */
290 CvPADLIST(cv) = padlist; 306 CvDEPTH (cv) = PTR2IV (POPs);
291#ifdef USE_THREADS 307 CvPADLIST (cv) = (AV *)POPs;
292 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
293#endif
294 }
295
296 ++CvDEPTH(cv);
297 } 308 }
298 309
299 PUTBACK; 310 PUTBACK;
300 } 311 }
301} 312}
302 313
303static void 314static void
304save_state(pTHX_ Coro__State c, int flags) 315save_state(Coro__State c, int flags)
305{ 316{
306 { 317 {
307 dSP; 318 dSP;
308 I32 cxix = cxstack_ix; 319 I32 cxix = cxstack_ix;
309 PERL_CONTEXT *ccstk = cxstack; 320 PERL_CONTEXT *ccstk = cxstack;
… …
316 327
317 PUSHs (Nullsv); 328 PUSHs (Nullsv);
318 /* this loop was inspired by pp_caller */ 329 /* this loop was inspired by pp_caller */
319 for (;;) 330 for (;;)
320 { 331 {
321 do 332 while (cxix >= 0)
322 { 333 {
323 PERL_CONTEXT *cx = &ccstk[cxix--]; 334 PERL_CONTEXT *cx = &ccstk[cxix--];
324 335
325 if (CxTYPE(cx) == CXt_SUB) 336 if (CxTYPE(cx) == CXt_SUB)
326 { 337 {
327 CV *cv = cx->blk_sub.cv; 338 CV *cv = cx->blk_sub.cv;
339
328 if (CvDEPTH(cv)) 340 if (CvDEPTH (cv))
329 { 341 {
330#ifdef USE_THREADS
331 /*XPUSHs ((SV *)CvOWNER(cv));*/
332 /*CvOWNER(cv) = 0;*/
333 /*error must unlock this cv etc.. etc...*/
334#endif
335 EXTEND (SP, CvDEPTH(cv)*2); 342 EXTEND (SP, 3);
336
337 while (--CvDEPTH(cv))
338 {
339 /* this tells the restore code to increment CvDEPTH */
340 PUSHs (Nullsv);
341 PUSHs ((SV *)cv);
342 }
343 343
344 PUSHs ((SV *)CvPADLIST(cv)); 344 PUSHs ((SV *)CvPADLIST(cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
345 PUSHs ((SV *)cv); 346 PUSHs ((SV *)cv);
346 347
348 CvDEPTH (cv) = 0;
347 get_padlist (cv); /* this is a monster */ 349 get_padlist (cv);
348 } 350 }
349 } 351 }
352#ifdef CXt_FORMAT
350 else if (CxTYPE(cx) == CXt_FORMAT) 353 else if (CxTYPE(cx) == CXt_FORMAT)
351 { 354 {
352 /* I never used formats, so how should I know how these are implemented? */ 355 /* I never used formats, so how should I know how these are implemented? */
353 /* my bold guess is as a simple, plain sub... */ 356 /* my bold guess is as a simple, plain sub... */
354 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
355 } 358 }
359#endif
356 } 360 }
357 while (cxix >= 0);
358 361
359 if (top_si->si_type == PERLSI_MAIN) 362 if (top_si->si_type == PERLSI_MAIN)
360 break; 363 break;
361 364
362 top_si = top_si->si_prev; 365 top_si = top_si->si_prev;
… …
369 372
370 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
371 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
372 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
373 376
374 /* I have not the slightest idea of why av_reify is necessary */ 377#define VAR(name,type)c->name = PL_ ## name;
375 /* but if it's missing the defav contents magically get replaced sometimes */ 378# include "state.h"
376 if (c->defav) 379#undef VAR
377 av_reify (c->defav); 380}
378 381
379 c->dowarn = PL_dowarn; 382/*
383 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace.
387 */
388static void
389coro_init_stacks ()
390{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
392 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
380 395
381 c->curstackinfo = PL_curstackinfo; 396 PL_stack_base = AvARRAY(PL_curstack);
382 c->curstack = PL_curstack;
383 c->mainstack = PL_mainstack;
384 c->stack_sp = PL_stack_sp;
385 c->op = PL_op;
386 c->curpad = PL_curpad;
387 c->stack_base = PL_stack_base; 397 PL_stack_sp = PL_stack_base;
388 c->stack_max = PL_stack_max; 398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
389 c->tmps_stack = PL_tmps_stack; 399
390 c->tmps_floor = PL_tmps_floor; 400 New(50,PL_tmps_stack,96,SV*);
391 c->tmps_ix = PL_tmps_ix; 401 PL_tmps_floor = -1;
392 c->tmps_max = PL_tmps_max; 402 PL_tmps_ix = -1;
403 PL_tmps_max = 96;
404
405 New(54,PL_markstack,16,I32);
393 c->markstack = PL_markstack; 406 PL_markstack_ptr = PL_markstack;
394 c->markstack_ptr = PL_markstack_ptr; 407 PL_markstack_max = PL_markstack + 16;
395 c->markstack_max = PL_markstack_max; 408
396 c->scopestack = PL_scopestack; 409#ifdef SET_MARK_OFFSET
397 c->scopestack_ix = PL_scopestack_ix; 410 SET_MARK_OFFSET;
398 c->scopestack_max = PL_scopestack_max; 411#endif
399 c->savestack = PL_savestack; 412
400 c->savestack_ix = PL_savestack_ix; 413 New(54,PL_scopestack,16,I32);
401 c->savestack_max = PL_savestack_max; 414 PL_scopestack_ix = 0;
402 c->retstack = PL_retstack; 415 PL_scopestack_max = 16;
403 c->retstack_ix = PL_retstack_ix; 416
404 c->retstack_max = PL_retstack_max; 417 New(54,PL_savestack,96,ANY);
405 c->curcop = PL_curcop; 418 PL_savestack_ix = 0;
419 PL_savestack_max = 96;
420
421#if !PERL_VERSION_ATLEAST (5,9,0)
422 New(54,PL_retstack,8,OP*);
423 PL_retstack_ix = 0;
424 PL_retstack_max = 8;
425#endif
406} 426}
407 427
408/* 428/*
409 * destroy the stacks, the callchain etc... 429 * destroy the stacks, the callchain etc...
410 * still there is a memleak of 128 bytes...
411 */ 430 */
412STATIC void 431static void
413destroy_stacks(pTHX) 432coro_destroy_stacks ()
414{ 433{
434 if (!IN_DESTRUCT)
435 {
415 /* is this ugly, I ask? */ 436 /* is this ugly, I ask? */
416 while (PL_scopestack_ix) 437 LEAVE_SCOPE (0);
417 LEAVE;
418 438
419 /* sure it is, but more important: is it correct?? :/ */ 439 /* sure it is, but more important: is it correct?? :/ */
420 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
421 FREETMPS; 440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
422 444
423 while (PL_curstackinfo->si_next) 445 while (PL_curstackinfo->si_next)
424 PL_curstackinfo = PL_curstackinfo->si_next; 446 PL_curstackinfo = PL_curstackinfo->si_next;
425 447
426 while (PL_curstackinfo) 448 while (PL_curstackinfo)
427 { 449 {
428 PERL_SI *p = PL_curstackinfo->si_prev; 450 PERL_SI *p = PL_curstackinfo->si_prev;
429 451
430 { 452 { /*D*//*remove*/
431 dSP; 453 dSP;
432 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
433 PUTBACK; /* possibly superfluous */ 455 PUTBACK; /* possibly superfluous */
434 } 456 }
435 457
436 dounwind(-1); 458 if (!IN_DESTRUCT)
437 459 {
460 dounwind (-1);/*D*//*remove*/
438 SvREFCNT_dec(PL_curstackinfo->si_stack); 461 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463
439 Safefree(PL_curstackinfo->si_cxstack); 464 Safefree (PL_curstackinfo->si_cxstack);
440 Safefree(PL_curstackinfo); 465 Safefree (PL_curstackinfo);
441 PL_curstackinfo = p; 466 PL_curstackinfo = p;
442 } 467 }
443 468
444 Safefree(PL_tmps_stack); 469 Safefree (PL_tmps_stack);
445 Safefree(PL_markstack); 470 Safefree (PL_markstack);
446 Safefree(PL_scopestack); 471 Safefree (PL_scopestack);
447 Safefree(PL_savestack); 472 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0)
448 Safefree(PL_retstack); 474 Safefree (PL_retstack);
475#endif
449} 476}
450 477
451STATIC void 478static void
452transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 479setup_coro (struct coro *coro)
480{
481 /*
482 * emulate part of the perl startup here.
483 */
484
485 coro_init_stacks ();
486
487 PL_curcop = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0;
490
491 {
492 dSP;
493 LOGOP myop;
494
495 /* I have no idea why this is needed, but it is */
496 PUSHMARK (SP);
497
498 SvREFCNT_dec (GvAV (PL_defgv));
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID;
504
505 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 }
515}
516
517static void
518free_coro_mortal ()
519{
520 if (coro_mortal)
521 {
522 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0;
524 }
525}
526
527static void NOINLINE
528prepare_cctx (coro_cctx *cctx)
453{ 529{
454 dSP; 530 dSP;
531 LOGOP myop;
455 532
456 if (prev != next) 533 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538
539 PUSHMARK (SP);
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN;
544}
545
546static void
547coro_run (void *arg)
548{
549 /* coro_run is the alternative epilogue of transfer() */
550 UNLOCK;
551
552 /*
553 * this is a _very_ stripped down perl interpreter ;)
554 */
555 PL_top_env = &PL_start_env;
556
557 /* inject call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg);
559
560 /* somebody will hit me for both perl_run and PL_restartop */
561 perl_run (PL_curinterp);
562
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564 abort ();
565}
566
567static coro_cctx *
568cctx_new ()
569{
570 coro_cctx *cctx;
571
572 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx);
575
576#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */
580 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581
582 if (cctx->sptr == (void *)-1)
457 { 583 {
458 /* 584 perror ("FATAL: unable to mmap stack for coroutine");
459 * this could be done in newprocess which would lead to 585 _exit (EXIT_FAILURE);
460 * extremely elegant and fast (just SAVE/LOAD) 586 }
461 * code here, but lazy allocation of stacks has also 587
462 * some virtues and the overhead of the if() is nil. 588# if STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
590# endif
591
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr)
598 {
599 perror ("FATAL: unable to malloc stack for coroutine");
600 _exit (EXIT_FAILURE);
601 }
602
603#endif
604
605#if USE_VALGRIND
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif
611
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
613
614 return cctx;
615}
616
617static void
618cctx_free (coro_cctx *cctx)
619{
620 if (!cctx)
621 return;
622
623 --cctx_count;
624
625#if USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif
628
629#if HAVE_MMAP
630 munmap (cctx->sptr, cctx->ssize);
631#else
632 Safefree (cctx->sptr);
633#endif
634
635 Safefree (cctx);
636}
637
638static coro_cctx *
639cctx_get ()
640{
641 coro_cctx *cctx;
642
643 if (cctx_first)
644 {
645 --cctx_idle;
646 cctx = cctx_first;
647 cctx_first = cctx->next;
648 }
649 else
650 {
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 }
654
655 return cctx;
656}
657
658static void
659cctx_put (coro_cctx *cctx)
660{
661 ++cctx_idle;
662 cctx->next = cctx_first;
663 cctx_first = cctx;
664}
665
666/* never call directly, always through the coro_state_transfer global variable */
667static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags)
669{
670 dSTACKLEVEL;
671
672 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL)
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
675 else if (prev != next)
676 {
677 coro_cctx *prev__cctx;
678
679 if (!prev->cctx)
463 */ 680 {
681 /* create a new empty context */
682 Newz (0, prev->cctx, 1, coro_cctx);
683 prev->cctx->inuse = 1;
684 prev->flags |= CF_RUNNING;
685 }
686
687 assert ( prev->flags & CF_RUNNING);
688 assert (!next->flags & CF_RUNNING);
689
690 prev->flags &= ~CF_RUNNING;
691 next->flags |= CF_RUNNING;
692
693 LOCK;
694
464 if (next->mainstack) 695 if (next->mainstack)
465 { 696 {
697 /* coroutine already started */
466 SAVE (prev, flags); 698 SAVE (prev, flags);
467 LOAD (next); 699 LOAD (next);
468 /* mark this state as in-use */
469 next->mainstack = 0;
470 next->tmps_ix = -2;
471 }
472 else if (next->tmps_ix == -2)
473 {
474 croak ("tried to transfer to running coroutine");
475 } 700 }
476 else 701 else
477 { 702 {
478 /* 703 /* need to start coroutine */
479 * emulate part of the perl startup here.
480 */
481 UNOP myop;
482
483 SAVE (prev, -1); /* first get rid of the old state */ 704 /* first get rid of the old state */
484 705 SAVE (prev, -1);
485 init_stacks (); /* from perl.c */ 706 /* setup coroutine call */
486 SPAGAIN; 707 setup_coro (next);
487 708 /* need a stack */
488 PL_op = (OP *)&myop; 709 assert (!next->stack);
489 /*PL_curcop = 0;*/ 710 next->cctx = 0;
490 SvREFCNT_dec (GvAV (PL_defgv));
491 GvAV (PL_defgv) = next->args;
492
493 Zero(&myop, 1, UNOP);
494 myop.op_next = Nullop;
495 myop.op_flags = OPf_WANT_VOID;
496
497 PUSHMARK(SP);
498 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
499 /*
500 * the next line is slightly wrong, as PL_op->op_next
501 * is actually being executed so we skip the first op.
502 * that doesn't matter, though, since it is only
503 * pp_nextstate and we never return...
504 * ah yes, and I don't care anyways ;)
505 */
506 PUTBACK;
507 PL_op = pp_entersub(aTHX);
508 SPAGAIN;
509
510 ENTER; /* necessary e.g. for dounwind */
511 } 711 }
712
713 prev__cctx = prev->cctx;
714
715 /* possibly "free" the cctx */
716 if (prev__cctx->idle_sp == STACKLEVEL)
717 {
718 assert (PL_top_env == prev__cctx->top_env);//D
719 cctx_put (prev__cctx);
720 prev->cctx = 0;
721 }
722
723 if (!next->cctx)
724 next->cctx = cctx_get ();
725
726 if (prev__cctx != next->cctx)
727 {
728 assert ( prev__cctx->inuse);
729 assert (!next->cctx->inuse);
730
731 prev__cctx->inuse = 0;
732 next->cctx->inuse = 1;
733
734 prev__cctx->top_env = PL_top_env;
735 PL_top_env = next->cctx->top_env;
736 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737 }
738
739 free_coro_mortal ();
740
741 UNLOCK;
512 } 742 }
513} 743}
514 744
745struct transfer_args
746{
747 struct coro *prev, *next;
748 int flags;
749};
750
751#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
752
753static void
754coro_state_destroy (struct coro *coro)
755{
756 if (coro->refcnt--)
757 return;
758
759 if (coro->mainstack && coro->mainstack != main_mainstack)
760 {
761 struct coro temp;
762
763 SAVE ((&temp), TRANSFER_SAVE_ALL);
764 LOAD (coro);
765
766 coro_destroy_stacks ();
767
768 LOAD ((&temp)); /* this will get rid of defsv etc.. */
769
770 coro->mainstack = 0;
771 }
772
773 cctx_free (coro->cctx);
774 SvREFCNT_dec (coro->args);
775 Safefree (coro);
776}
777
778static int
779coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
780{
781 struct coro *coro = (struct coro *)mg->mg_ptr;
782 mg->mg_ptr = 0;
783
784 coro_state_destroy (coro);
785
786 return 0;
787}
788
789static int
790coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
791{
792 struct coro *coro = (struct coro *)mg->mg_ptr;
793
794 ++coro->refcnt;
795
796 return 0;
797}
798
799static MGVTBL coro_state_vtbl = {
800 0, 0, 0, 0,
801 coro_state_clear,
802 0,
803#ifdef MGf_DUP
804 coro_state_dup,
805#else
806# define MGf_DUP 0
807#endif
808};
809
810static struct coro *
811SvSTATE (SV *coro)
812{
813 HV *stash;
814 MAGIC *mg;
815
816 if (SvROK (coro))
817 coro = SvRV (coro);
818
819 stash = SvSTASH (coro);
820 if (stash != coro_stash && stash != coro_state_stash)
821 {
822 /* very slow, but rare, check */
823 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
824 croak ("Coro::State object required");
825 }
826
827 mg = SvMAGIC (coro);
828 assert (mg->mg_type == PERL_MAGIC_ext);
829 return (struct coro *)mg->mg_ptr;
830}
831
832static void
833prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
834{
835 ta->prev = SvSTATE (prev);
836 ta->next = SvSTATE (next);
837 ta->flags = flags;
838}
839
840static void
841api_transfer (SV *prev, SV *next, int flags)
842{
843 dTHX;
844 struct transfer_args ta;
845
846 prepare_transfer (&ta, prev, next, flags);
847 TRANSFER (ta);
848}
849
850/** Coro ********************************************************************/
851
852#define PRIO_MAX 3
853#define PRIO_HIGH 1
854#define PRIO_NORMAL 0
855#define PRIO_LOW -1
856#define PRIO_IDLE -3
857#define PRIO_MIN -4
858
859/* for Coro.pm */
860static GV *coro_current, *coro_idle;
861static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862static int coro_nready;
863
864static void
865coro_enq (SV *sv)
866{
867 int prio;
868
869 if (SvTYPE (sv) != SVt_PVHV)
870 croak ("Coro::ready tried to enqueue something that is not a coroutine");
871
872 prio = SvSTATE (sv)->prio;
873
874 av_push (coro_ready [prio - PRIO_MIN], sv);
875 coro_nready++;
876}
877
878static SV *
879coro_deq (int min_prio)
880{
881 int prio = PRIO_MAX - PRIO_MIN;
882
883 min_prio -= PRIO_MIN;
884 if (min_prio < 0)
885 min_prio = 0;
886
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]);
892 }
893
894 return 0;
895}
896
897static int
898api_ready (SV *coro_sv)
899{
900 struct coro *coro;
901
902 if (SvROK (coro_sv))
903 coro_sv = SvRV (coro_sv);
904
905 coro = SvSTATE (coro_sv);
906 if (coro->flags & CF_READY)
907 return 0;
908
909 coro->flags |= CF_READY;
910
911 LOCK;
912 coro_enq (SvREFCNT_inc (coro_sv));
913 UNLOCK;
914
915 return 1;
916}
917
918static int
919api_is_ready (SV *coro_sv)
920{
921 struct coro *coro;
922
923 return !!(SvSTATE (coro_sv)->flags & CF_READY);
924}
925
926static void
927prepare_schedule (struct transfer_args *ta)
928{
929 SV *current, *prev, *next;
930
931 current = GvSV (coro_current);
932
933 for (;;)
934 {
935 LOCK;
936 next = coro_deq (PRIO_MIN);
937 UNLOCK;
938
939 if (next)
940 break;
941
942 {
943 dSP;
944
945 ENTER;
946 SAVETMPS;
947
948 PUSHMARK (SP);
949 PUTBACK;
950 call_sv (GvSV (coro_idle), G_DISCARD);
951
952 FREETMPS;
953 LEAVE;
954 }
955 }
956
957 prev = SvRV (current);
958 SvRV (current) = next;
959
960 /* free this only after the transfer */
961 LOCK;
962 free_coro_mortal ();
963 UNLOCK;
964 coro_mortal = prev;
965
966 ta->prev = SvSTATE (prev);
967 ta->next = SvSTATE (next);
968 ta->flags = TRANSFER_SAVE_ALL;
969
970 ta->next->flags &= ~CF_READY;
971}
972
973static void
974prepare_cede (struct transfer_args *ta)
975{
976 api_ready (GvSV (coro_current));
977
978 prepare_schedule (ta);
979}
980
981static void
982api_schedule (void)
983{
984 dTHX;
985 struct transfer_args ta;
986
987 prepare_schedule (&ta);
988 TRANSFER (ta);
989}
990
991static void
992api_cede (void)
993{
994 dTHX;
995 struct transfer_args ta;
996
997 prepare_cede (&ta);
998 TRANSFER (ta);
999}
1000
515MODULE = Coro::State PACKAGE = Coro::State 1001MODULE = Coro::State PACKAGE = Coro::State
516 1002
517PROTOTYPES: ENABLE 1003PROTOTYPES: DISABLE
518 1004
519BOOT: 1005BOOT:
520{ /* {} necessary for stoopid perl-5.6.x */ 1006{
1007#ifdef USE_ITHREADS
1008 MUTEX_INIT (&coro_mutex);
1009#endif
1010 BOOT_PAGESIZE;
1011
521 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 1012 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
522 1013
523 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1014 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
524 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1015 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
525 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1016 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
526
527 if (!padlist_cache)
528 padlist_cache = newHV ();
529 1017
530 main_mainstack = PL_mainstack; 1018 main_mainstack = PL_mainstack;
531}
532 1019
533Coro::State 1020 coroapi.ver = CORO_API_VERSION;
534_newprocess(args) 1021 coroapi.transfer = api_transfer;
535 SV * args 1022
536 PROTOTYPE: $ 1023 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1024}
1025
1026SV *
1027new (char *klass, ...)
537 CODE: 1028 CODE:
538 Coro__State coro; 1029{
1030 struct coro *coro;
1031 HV *hv;
1032 int i;
539 1033
540 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
541 croak ("Coro::State::_newprocess expects an arrayref");
542
543 New (0, coro, 1, struct coro); 1034 Newz (0, coro, 1, struct coro);
1035 coro->args = newAV ();
544 1036
545 coro->mainstack = 0; /* actual work is done inside transfer */ 1037 hv = newHV ();
546 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1038 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1039 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
547 1040
548 RETVAL = coro; 1041 for (i = 1; i < items; i++)
1042 av_push (coro->args, newSVsv (ST (i)));
1043}
549 OUTPUT: 1044 OUTPUT:
550 RETVAL 1045 RETVAL
551 1046
552void 1047void
553transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1048_set_stacklevel (...)
554 Coro::State_or_hashref prev 1049 ALIAS:
555 Coro::State_or_hashref next 1050 Coro::State::transfer = 1
556 int flags 1051 Coro::schedule = 2
557 PROTOTYPE: @ 1052 Coro::cede = 3
1053 Coro::Cont::yield = 4
558 CODE: 1054 CODE:
1055{
1056 struct transfer_args ta;
559 1057
560 transfer (aTHX_ prev, next, flags); 1058 switch (ix)
1059 {
1060 case 0:
1061 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1062 ta.next = 0;
1063 ta.flags = TRANSFER_SET_STACKLEVEL;
1064 break;
1065
1066 case 1:
1067 if (items != 3)
1068 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1069
1070 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1071 break;
1072
1073 case 2:
1074 prepare_schedule (&ta);
1075 break;
1076
1077 case 3:
1078 prepare_cede (&ta);
1079 break;
1080
1081 case 4:
1082 {
1083 SV *yieldstack;
1084 SV *sv;
1085 AV *defav = GvAV (PL_defgv);
1086
1087 yieldstack = *hv_fetch (
1088 (HV *)SvRV (GvSV (coro_current)),
1089 "yieldstack", sizeof ("yieldstack") - 1,
1090 0
1091 );
1092
1093 /* set up @_ -- ugly */
1094 av_clear (defav);
1095 av_fill (defav, items - 1);
1096 while (items--)
1097 av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099 sv = av_pop ((AV *)SvRV (yieldstack));
1100 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102 ta.flags = 0;
1103 SvREFCNT_dec (sv);
1104 }
1105 break;
1106
1107 }
1108
1109 TRANSFER (ta);
1110}
561 1111
562void 1112void
563DESTROY(coro) 1113_clone_state_from (SV *dst, SV *src)
564 Coro::State coro 1114 CODE:
1115{
1116 struct coro *coro_src = SvSTATE (src);
1117
1118 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1119
1120 ++coro_src->refcnt;
1121 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1122}
1123
1124void
1125_exit (code)
1126 int code
1127 PROTOTYPE: $
1128 CODE:
1129 _exit (code);
1130
1131int
1132cctx_count ()
1133 CODE:
1134 RETVAL = cctx_count;
1135 OUTPUT:
1136 RETVAL
1137
1138int
1139cctx_idle ()
1140 CODE:
1141 RETVAL = cctx_idle;
1142 OUTPUT:
1143 RETVAL
1144
1145MODULE = Coro::State PACKAGE = Coro
1146
1147BOOT:
1148{
1149 int i;
1150
1151 coro_stash = gv_stashpv ("Coro", TRUE);
1152
1153 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1154 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1155 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1156 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1157 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1158 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1159
1160 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1161 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1162
1163 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1164 coro_ready[i] = newAV ();
1165
1166 {
1167 SV *sv = perl_get_sv("Coro::API", 1);
1168
1169 coroapi.schedule = api_schedule;
1170 coroapi.cede = api_cede;
1171 coroapi.ready = api_ready;
1172 coroapi.is_ready = api_is_ready;
1173 coroapi.nready = &coro_nready;
1174 coroapi.current = coro_current;
1175
1176 GCoroAPI = &coroapi;
1177 sv_setiv (sv, (IV)&coroapi);
1178 SvREADONLY_on (sv);
1179 }
1180}
1181
1182int
1183prio (Coro::State coro, int newprio = 0)
1184 ALIAS:
1185 nice = 1
565 CODE: 1186 CODE:
1187{
1188 RETVAL = coro->prio;
566 1189
567 if (coro->mainstack && coro->mainstack != main_mainstack) 1190 if (items > 1)
568 { 1191 {
569 struct coro temp; 1192 if (ix)
1193 newprio += coro->prio;
570 1194
571 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1195 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
572 LOAD(aTHX_ coro); 1196 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
573 1197
574 destroy_stacks (); 1198 coro->prio = newprio;
575
576 LOAD((&temp)); /* this will get rid of defsv etc.. */
577 } 1199 }
1200}
578 1201
579 Safefree (coro); 1202SV *
1203ready (SV *self)
1204 PROTOTYPE: $
1205 CODE:
1206 RETVAL = boolSV (api_ready (self));
1207 OUTPUT:
1208 RETVAL
580 1209
581 /* 1210SV *
582 * there is one problematic case left (remember _recurse?) 1211is_ready (SV *self)
583 * consider the case when we 1212 PROTOTYPE: $
584 * 1213 CODE:
585 * 1. start a coroutine 1214 RETVAL = boolSV (api_is_ready (self));
586 * 2. inside it descend into some xs functions 1215 OUTPUT:
587 * 3. xs function calls a callback 1216 RETVAL
588 * 4. callback switches to $main
589 * 5. $main ends - we will end inside the xs function
590 * 6. xs function returns and perl executes - what?
591 *
592 * to avoid this case we recurse in this function
593 * and simply call my_exit(0), skipping other xs functions
594 */
595 1217
596#if 0 1218int
1219nready (...)
1220 PROTOTYPE:
1221 CODE:
1222 RETVAL = coro_nready;
1223 OUTPUT:
1224 RETVAL
1225
1226MODULE = Coro::State PACKAGE = Coro::AIO
1227
1228SV *
1229_get_state ()
1230 CODE:
1231{
1232 struct {
1233 int errorno;
1234 int laststype;
1235 int laststatval;
1236 Stat_t statcache;
1237 } data;
1238
1239 data.errorno = errno;
1240 data.laststype = PL_laststype;
1241 data.laststatval = PL_laststatval;
1242 data.statcache = PL_statcache;
1243
1244 RETVAL = newSVpvn ((char *)&data, sizeof data);
1245}
1246 OUTPUT:
1247 RETVAL
1248
597void 1249void
598_recurse() 1250_set_state (char *data_)
1251 PROTOTYPE: $
599 CODE: 1252 CODE:
600 LEAVE; 1253{
601 PL_stack_sp = PL_stack_base + ax - 1; 1254 struct {
602 PL_op = PL_op->op_next; 1255 int errorno;
603 CALLRUNOPS(aTHX); 1256 int laststype;
604 printf ("my_exit\n"); 1257 int laststatval;
605 my_exit (0); 1258 Stat_t statcache;
1259 } *data = (void *)data_;
606 1260
607#endif 1261 errno = data->errorno;
608 1262 PL_laststype = data->laststype;
609void 1263 PL_laststatval = data->laststatval;
610flush() 1264 PL_statcache = data->statcache;
611 CODE: 1265}
612#ifdef MAY_FLUSH
613 flush_padlist_cache ();
614#endif
615
616MODULE = Coro::State PACKAGE = Coro::Cont
617
618# this is dirty (do you hear me?) and should be in it's own .xs
619
620void
621result(...)
622 PROTOTYPE: @
623 CODE:
624 static SV *returnstk;
625 SV *sv;
626 AV *defav = GvAV (PL_defgv);
627 struct coro *prev, *next;
628
629 if (!returnstk)
630 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
631
632 /* set up @_ -- ugly */
633 av_clear (defav);
634 av_fill (defav, items - 1);
635 while (items--)
636 av_store (defav, items, SvREFCNT_inc (ST(items)));
637
638 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
639 sv = av_pop ((AV *)SvRV (returnstk));
640 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
641 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
642 SvREFCNT_dec (sv);
643 transfer(prev, next, 0);
644

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