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Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 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"
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
6 50
7#ifdef HAVE_MMAP 51#ifdef HAVE_MMAP
8# include <unistd.h> 52# include <unistd.h>
9# include <sys/mman.h> 53# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
13# else 57# else
14# undef HAVE_MMAP 58# undef HAVE_MMAP
15# endif 59# endif
16# 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
17#endif 68# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 69#else
30# define TRANSFER_LAZY_STACK 0x00000000 70# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0
31#endif 72#endif
32 73
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)
35
36#define SUB_INIT "Coro::State::initialize"
37#define UCORO_STATE "_coro_state"
38
39/* The next macro should delcare a variable stacklevel that contains and approximation 74/* The next macro should declare a variable stacklevel that contains and approximation
40 * to the current C stack pointer. It's property is that it changes with each call 75 * to the current C stack pointer. Its property is that it changes with each call
41 * and should be unique. */ 76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
42#define dSTACKLEVEL void *stacklevel = &stacklevel 78#define STACKLEVEL ((void *)&stacklevel)
43 79
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 81
46/* this is actually not only the c stack but also c registers etc... */ 82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif
87
88#define NOINLINE attribute ((noinline))
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 */
47typedef struct { 112typedef struct coro_cctx {
48 int refcnt; /* pointer reference counter */ 113 struct coro_cctx *next;
49 int usecnt; /* shared by how many coroutines */
50 int gencnt; /* generation counter */
51 114
52 coro_context cctx; 115 /* the stack */
53
54 void *sptr; 116 void *sptr;
55 long ssize; /* positive == mmap, otherwise malloc */ 117 long ssize; /* positive == mmap, otherwise malloc */
56} coro_stack;
57 118
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 */
58struct coro { 130struct coro {
59 /* the optional C context */ 131 /* the c coroutine allocated to this perl coroutine, if any */
60 coro_stack *stack; 132 coro_cctx *cctx;
61 void *cursp; 133
134 /* data associated with this coroutine (initial args) */
135 AV *args;
62 int gencnt; 136 int refcnt;
63 137
64 /* optionally saved, might be zero */ 138 /* optionally saved, might be zero */
65 AV *defav; 139 AV *defav;
66 SV *defsv; 140 SV *defsv;
67 SV *errsv; 141 SV *errsv;
68 142
69 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
70 U8 dowarn; 144# include "state.h"
145#undef VAR
71 146
72 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
73 PERL_SI *curstackinfo; 148 int prio;
74 AV *curstack;
75 AV *mainstack;
76 SV **stack_sp;
77 OP *op;
78 SV **curpad;
79 SV **stack_base;
80 SV **stack_max;
81 SV **tmps_stack;
82 I32 tmps_floor;
83 I32 tmps_ix;
84 I32 tmps_max;
85 I32 *markstack;
86 I32 *markstack_ptr;
87 I32 *markstack_max;
88 I32 *scopestack;
89 I32 scopestack_ix;
90 I32 scopestack_max;
91 ANY *savestack;
92 I32 savestack_ix;
93 I32 savestack_max;
94 OP **retstack;
95 I32 retstack_ix;
96 I32 retstack_max;
97 COP *curcop;
98 JMPENV start_env;
99 JMPENV *top_env;
100
101 /* data associated with this coroutine (initial args) */
102 AV *args;
103}; 149};
104 150
105typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
106typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
107 153
108static AV *main_mainstack; /* used to differentiate between $main and others */ 154static AV *
109static HV *coro_state_stash; 155coro_clone_padlist (CV *cv)
110static SV *ucoro_state_sv;
111static U32 ucoro_state_hash;
112static HV *padlist_cache;
113
114/* mostly copied from op.c:cv_clone2 */
115STATIC AV *
116clone_padlist (AV *protopadlist)
117{ 156{
118 AV *av; 157 AV *padlist = CvPADLIST (cv);
119 I32 ix;
120 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
121 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
122 SV **pname = AvARRAY (protopad_name);
123 SV **ppad = AvARRAY (protopad);
124 I32 fname = AvFILLp (protopad_name);
125 I32 fpad = AvFILLp (protopad);
126 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
127 SV **npad;
128
129 newpad_name = newAV ();
130 for (ix = fname; ix >= 0; ix--)
131 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133 newpad = newAV ();
134 av_fill (newpad, AvFILLp (protopad));
135 npad = AvARRAY (newpad);
136 159
137 newpadlist = newAV (); 160 newpadlist = newAV ();
138 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
139 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)));
140 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
141 172
142 av = newAV (); /* will be @_ */ 173 return newpadlist;
143 av_extend (av, 0); 174}
144 av_store (newpad, 0, (SV *) av);
145 AvFLAGS (av) = AVf_REIFY;
146 175
147 for (ix = fpad; ix > 0; ix--) 176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
148 { 181 {
149 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 182 I32 i = AvFILLp (padlist);
150 if (namesv && namesv != &PL_sv_undef) 183 while (i >= 0)
151 { 184 {
152 char *name = SvPVX (namesv); /* XXX */ 185 SV **svp = av_fetch (padlist, i--, FALSE);
153 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 186 if (svp)
154 { /* lexical from outside? */
155 npad[ix] = SvREFCNT_inc (ppad[ix]);
156 } 187 {
157 else
158 { /* our own lexical */
159 SV *sv; 188 SV *sv;
160 if (*name == '&') 189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
161 sv = SvREFCNT_inc (ppad[ix]); 190 SvREFCNT_dec (sv);
162 else if (*name == '@') 191
163 sv = (SV *) newAV (); 192 SvREFCNT_dec (*svp);
164 else if (*name == '%')
165 sv = (SV *) newHV ();
166 else
167 sv = NEWSV (0, 0);
168 if (!SvPADBUSY (sv))
169 SvPADMY_on (sv);
170 npad[ix] = sv;
171 } 193 }
172 } 194 }
173 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 195
174 { 196 SvREFCNT_dec ((SV*)padlist);
175 npad[ix] = SvREFCNT_inc (ppad[ix]);
176 }
177 else
178 {
179 SV *sv = NEWSV (0, 0);
180 SvPADTMP_on (sv);
181 npad[ix] = sv;
182 }
183 } 197 }
198}
184 199
185#if 0 /* return -ENOTUNDERSTOOD */ 200static int
186 /* 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;
187 205
188 for (ix = fpad; ix > 0; ix--) { 206 /* casting is fun. */
189 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
190 if (namesv 208 free_padlist (padlist);
191 && namesv != &PL_sv_undef 209
192 && !(SvFLAGS(namesv) & SVf_FAKE) 210 SvREFCNT_dec (av);
193 && *SvPVX(namesv) == '&' 211
194 && CvCLONE(ppad[ix])) 212 return 0;
195 { 213}
196 CV *kid = cv_clone((CV*)ppad[ix]); 214
197 SvREFCNT_dec(ppad[ix]); 215#define PERL_MAGIC_coro PERL_MAGIC_ext
198 CvCLONE_on(kid); 216
199 SvPADMY_on(kid); 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
200 npad[ix] = (SV*)kid; 218
201 } 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 ();
202 } 261 }
203#endif
204 262
205 return newpadlist; 263 av = (AV *)mg->mg_obj;
206}
207 264
208#ifdef MAY_FLUSH 265 if (AvFILLp (av) >= AvMAX (av))
209STATIC AV * 266 av_extend (av, AvMAX (av) + 1);
210free_padlist (AV *padlist)
211{
212 /* may be during global destruction */
213 if (SvREFCNT(padlist))
214 {
215 I32 i = AvFILLp(padlist);
216 while (i >= 0)
217 {
218 SV **svp = av_fetch(padlist, i--, FALSE);
219 SV *sv = svp ? *svp : Nullsv;
220 if (sv)
221 SvREFCNT_dec(sv);
222 }
223 267
224 SvREFCNT_dec((SV*)padlist); 268 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
225 }
226} 269}
227#endif
228
229/* the next two functions merely cache the padlists */
230STATIC void
231get_padlist (CV *cv)
232{
233 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
234
235 if (he && AvFILLp ((AV *)*he) >= 0)
236 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
237 else
238 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239}
240
241STATIC void
242put_padlist (CV *cv)
243{
244 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
245
246 if (SvTYPE (*he) != SVt_PVAV)
247 {
248 SvREFCNT_dec (*he);
249 *he = (SV *)newAV ();
250 }
251
252 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
253}
254
255#ifdef MAY_FLUSH
256STATIC void
257flush_padlist_cache ()
258{
259 HV *hv = padlist_cache;
260 padlist_cache = newHV ();
261
262 if (hv_iterinit (hv))
263 {
264 HE *he;
265 AV *padlist;
266
267 while (!!(he = hv_iternext (hv)))
268 {
269 AV *av = (AV *)HeVAL(he);
270
271 /* casting is fun. */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273 free_padlist (padlist);
274 }
275 }
276
277 SvREFCNT_dec (hv);
278}
279#endif
280 270
281#define SB do { 271#define SB do {
282#define SE } while (0) 272#define SE } while (0)
283 273
284#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 274#define LOAD(state) load_state((state));
285#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 275#define SAVE(state,flags) save_state((state),(flags));
286 276
287#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
288 278
289static void 279static void
290load_state(pTHX_ Coro__State c) 280load_state(Coro__State c)
291{ 281{
292 PL_dowarn = c->dowarn; 282#define VAR(name,type) PL_ ## name = c->name;
293 283# include "state.h"
294 PL_curstackinfo = c->curstackinfo; 284#undef VAR
295 PL_curstack = c->curstack;
296 PL_mainstack = c->mainstack;
297 PL_stack_sp = c->stack_sp;
298 PL_op = c->op;
299 PL_curpad = c->curpad;
300 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix;
305 PL_tmps_max = c->tmps_max;
306 PL_markstack = c->markstack;
307 PL_markstack_ptr = c->markstack_ptr;
308 PL_markstack_max = c->markstack_max;
309 PL_scopestack = c->scopestack;
310 PL_scopestack_ix = c->scopestack_ix;
311 PL_scopestack_max = c->scopestack_max;
312 PL_savestack = c->savestack;
313 PL_savestack_ix = c->savestack_ix;
314 PL_savestack_max = c->savestack_max;
315 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max;
318 PL_curcop = c->curcop;
319 PL_start_env = c->start_env;
320 PL_top_env = c->top_env;
321 285
322 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 286 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
323 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 287 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
324 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 288 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
325 289
… …
328 CV *cv; 292 CV *cv;
329 293
330 /* now do the ugly restore mess */ 294 /* now do the ugly restore mess */
331 while ((cv = (CV *)POPs)) 295 while ((cv = (CV *)POPs))
332 { 296 {
333 AV *padlist = (AV *)POPs;
334
335 if (padlist)
336 {
337 put_padlist (cv); /* mark this padlist as available */ 297 put_padlist (cv); /* mark this padlist as available */
338 CvPADLIST(cv) = padlist; 298 CvDEPTH (cv) = PTR2IV (POPs);
339#ifdef USE_THREADS 299 CvPADLIST (cv) = (AV *)POPs;
340 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
341#endif
342 }
343
344 ++CvDEPTH(cv);
345 } 300 }
346 301
347 PUTBACK; 302 PUTBACK;
348 } 303 }
349} 304}
350 305
351static void 306static void
352save_state(pTHX_ Coro__State c, int flags) 307save_state(Coro__State c, int flags)
353{ 308{
354 { 309 {
355 dSP; 310 dSP;
356 I32 cxix = cxstack_ix; 311 I32 cxix = cxstack_ix;
357 PERL_CONTEXT *ccstk = cxstack; 312 PERL_CONTEXT *ccstk = cxstack;
… …
364 319
365 PUSHs (Nullsv); 320 PUSHs (Nullsv);
366 /* this loop was inspired by pp_caller */ 321 /* this loop was inspired by pp_caller */
367 for (;;) 322 for (;;)
368 { 323 {
369 do 324 while (cxix >= 0)
370 { 325 {
371 PERL_CONTEXT *cx = &ccstk[cxix--]; 326 PERL_CONTEXT *cx = &ccstk[cxix--];
372 327
373 if (CxTYPE(cx) == CXt_SUB) 328 if (CxTYPE(cx) == CXt_SUB)
374 { 329 {
375 CV *cv = cx->blk_sub.cv; 330 CV *cv = cx->blk_sub.cv;
331
376 if (CvDEPTH(cv)) 332 if (CvDEPTH (cv))
377 { 333 {
378#ifdef USE_THREADS
379 /*XPUSHs ((SV *)CvOWNER(cv));*/
380 /*CvOWNER(cv) = 0;*/
381 /*error must unlock this cv etc.. etc...*/
382#endif
383 EXTEND (SP, CvDEPTH(cv)*2); 334 EXTEND (SP, 3);
384
385 while (--CvDEPTH(cv))
386 {
387 /* this tells the restore code to increment CvDEPTH */
388 PUSHs (Nullsv);
389 PUSHs ((SV *)cv);
390 }
391 335
392 PUSHs ((SV *)CvPADLIST(cv)); 336 PUSHs ((SV *)CvPADLIST(cv));
337 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
393 PUSHs ((SV *)cv); 338 PUSHs ((SV *)cv);
394 339
340 CvDEPTH (cv) = 0;
395 get_padlist (cv); /* this is a monster */ 341 get_padlist (cv);
396 } 342 }
397 } 343 }
344#ifdef CXt_FORMAT
398 else if (CxTYPE(cx) == CXt_FORMAT) 345 else if (CxTYPE(cx) == CXt_FORMAT)
399 { 346 {
400 /* 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? */
401 /* my bold guess is as a simple, plain sub... */ 348 /* my bold guess is as a simple, plain sub... */
402 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");
403 } 350 }
351#endif
404 } 352 }
405 while (cxix >= 0);
406 353
407 if (top_si->si_type == PERLSI_MAIN) 354 if (top_si->si_type == PERLSI_MAIN)
408 break; 355 break;
409 356
410 top_si = top_si->si_prev; 357 top_si = top_si->si_prev;
… …
417 364
418 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;
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 366 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 367 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
421 368
422 /* I have not the slightest idea of why av_reify is necessary */ 369#define VAR(name,type)c->name = PL_ ## name;
423 /* but if it's missing the defav contents magically get replaced sometimes */ 370# include "state.h"
424 if (c->defav) 371#undef VAR
425 av_reify (c->defav);
426
427 c->dowarn = PL_dowarn;
428
429 c->curstackinfo = PL_curstackinfo;
430 c->curstack = PL_curstack;
431 c->mainstack = PL_mainstack;
432 c->stack_sp = PL_stack_sp;
433 c->op = PL_op;
434 c->curpad = PL_curpad;
435 c->stack_base = PL_stack_base;
436 c->stack_max = PL_stack_max;
437 c->tmps_stack = PL_tmps_stack;
438 c->tmps_floor = PL_tmps_floor;
439 c->tmps_ix = PL_tmps_ix;
440 c->tmps_max = PL_tmps_max;
441 c->markstack = PL_markstack;
442 c->markstack_ptr = PL_markstack_ptr;
443 c->markstack_max = PL_markstack_max;
444 c->scopestack = PL_scopestack;
445 c->scopestack_ix = PL_scopestack_ix;
446 c->scopestack_max = PL_scopestack_max;
447 c->savestack = PL_savestack;
448 c->savestack_ix = PL_savestack_ix;
449 c->savestack_max = PL_savestack_max;
450 c->retstack = PL_retstack;
451 c->retstack_ix = PL_retstack_ix;
452 c->retstack_max = PL_retstack_max;
453 c->curcop = PL_curcop;
454 c->start_env = PL_start_env;
455 c->top_env = PL_top_env;
456} 372}
457 373
458/* 374/*
459 * allocate various perl stacks. This is an exact copy 375 * allocate various perl stacks. This is an exact copy
460 * of perl.c:init_stacks, except that it uses less memory 376 * of perl.c:init_stacks, except that it uses less memory
461 * on the assumption that coroutines do not usually need 377 * on the (sometimes correct) assumption that coroutines do
462 * a lot of stackspace. 378 * not usually need a lot of stackspace.
463 */ 379 */
464STATIC void 380static void
465coro_init_stacks (pTHX) 381coro_init_stacks ()
466{ 382{
467 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 383 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
468 PL_curstackinfo->si_type = PERLSI_MAIN; 384 PL_curstackinfo->si_type = PERLSI_MAIN;
469 PL_curstack = PL_curstackinfo->si_stack; 385 PL_curstack = PL_curstackinfo->si_stack;
470 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
480 396
481 New(54,PL_markstack,16,I32); 397 New(54,PL_markstack,16,I32);
482 PL_markstack_ptr = PL_markstack; 398 PL_markstack_ptr = PL_markstack;
483 PL_markstack_max = PL_markstack + 16; 399 PL_markstack_max = PL_markstack + 16;
484 400
401#ifdef SET_MARK_OFFSET
485 SET_MARK_OFFSET; 402 SET_MARK_OFFSET;
403#endif
486 404
487 New(54,PL_scopestack,16,I32); 405 New(54,PL_scopestack,16,I32);
488 PL_scopestack_ix = 0; 406 PL_scopestack_ix = 0;
489 PL_scopestack_max = 16; 407 PL_scopestack_max = 16;
490 408
491 New(54,PL_savestack,96,ANY); 409 New(54,PL_savestack,96,ANY);
492 PL_savestack_ix = 0; 410 PL_savestack_ix = 0;
493 PL_savestack_max = 96; 411 PL_savestack_max = 96;
494 412
413#if !PERL_VERSION_ATLEAST (5,9,0)
495 New(54,PL_retstack,8,OP*); 414 New(54,PL_retstack,8,OP*);
496 PL_retstack_ix = 0; 415 PL_retstack_ix = 0;
497 PL_retstack_max = 8; 416 PL_retstack_max = 8;
417#endif
498} 418}
499 419
500/* 420/*
501 * destroy the stacks, the callchain etc... 421 * destroy the stacks, the callchain etc...
502 * still there is a memleak of 128 bytes...
503 */ 422 */
504STATIC void 423static void
505destroy_stacks(pTHX) 424coro_destroy_stacks ()
506{ 425{
426 if (!IN_DESTRUCT)
427 {
507 /* is this ugly, I ask? */ 428 /* is this ugly, I ask? */
508 while (PL_scopestack_ix) 429 LEAVE_SCOPE (0);
509 LEAVE;
510 430
511 /* sure it is, but more important: is it correct?? :/ */ 431 /* sure it is, but more important: is it correct?? :/ */
512 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513 FREETMPS; 432 FREETMPS;
433
434 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
435 }
514 436
515 while (PL_curstackinfo->si_next) 437 while (PL_curstackinfo->si_next)
516 PL_curstackinfo = PL_curstackinfo->si_next; 438 PL_curstackinfo = PL_curstackinfo->si_next;
517 439
518 while (PL_curstackinfo) 440 while (PL_curstackinfo)
519 { 441 {
520 PERL_SI *p = PL_curstackinfo->si_prev; 442 PERL_SI *p = PL_curstackinfo->si_prev;
521 443
522 { 444 { /*D*//*remove*/
523 dSP; 445 dSP;
524 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 446 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525 PUTBACK; /* possibly superfluous */ 447 PUTBACK; /* possibly superfluous */
526 } 448 }
527 449
528 dounwind(-1); 450 if (!IN_DESTRUCT)
529 451 {
452 dounwind (-1);/*D*//*remove*/
530 SvREFCNT_dec(PL_curstackinfo->si_stack); 453 SvREFCNT_dec (PL_curstackinfo->si_stack);
454 }
455
531 Safefree(PL_curstackinfo->si_cxstack); 456 Safefree (PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo); 457 Safefree (PL_curstackinfo);
533 PL_curstackinfo = p; 458 PL_curstackinfo = p;
534 } 459 }
535 460
536 Safefree(PL_tmps_stack); 461 Safefree (PL_tmps_stack);
537 Safefree(PL_markstack); 462 Safefree (PL_markstack);
538 Safefree(PL_scopestack); 463 Safefree (PL_scopestack);
539 Safefree(PL_savestack); 464 Safefree (PL_savestack);
465#if !PERL_VERSION_ATLEAST (5,9,0)
540 Safefree(PL_retstack); 466 Safefree (PL_retstack);
541}
542
543static void
544allocate_stack (Coro__State ctx, int alloc)
545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
555#ifdef HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif 467#endif
560 {
561 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long);
563 New (0, stack->sptr, 4096, long);
564 }
565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
570} 468}
571 469
572static void 470static void
573deallocate_stack (Coro__State ctx) 471setup_coro (struct coro *coro)
574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
583#ifdef HAVE_MMAP
584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
587#else
588 Safefree (stack->sptr);
589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
595}
596
597static void
598setup_coro (void *arg)
599{ 472{
600 /* 473 /*
601 * emulate part of the perl startup here. 474 * emulate part of the perl startup here.
602 */ 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{
603 dSP; 522 dSP;
604 Coro__State ctx = (Coro__State)arg; 523 LOGOP myop;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606 524
607 coro_init_stacks (aTHX); 525 Zero (&myop, 1, LOGOP);
608 JMPENV_BOOTSTRAP; 526 myop.op_next = PL_op;
527 myop.op_flags = OPf_WANT_VOID;
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);
609 SPAGAIN; 535 SPAGAIN;
610
611 /*PL_curcop = 0;*/
612 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args;
614
615 if (ctx->stack)
616 {
617 ctx->cursp = 0;
618
619 PUSHMARK(SP);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS);
622 croak ("FATAL: CCTXT coroutine returned!");
623 }
624 else
625 {
626 UNOP myop;
627
628 PL_op = (OP *)&myop;
629
630 Zero(&myop, 1, UNOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK(SP);
635 XPUSHs (sub_init);
636 /*
637 * the next line is slightly wrong, as PL_op->op_next
638 * is actually being executed so we skip the first op.
639 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;)
642 */
643 PUTBACK;
644 PL_op = pp_entersub();
645 SPAGAIN;
646
647 ENTER; /* necessary e.g. for dounwind */
648 }
649} 536}
650 537
651static void 538static void
652continue_coro (void *arg) 539coro_run (void *arg)
653{ 540{
541 /* coro_run is the alternative epilogue of transfer() */
542 UNLOCK;
543
654 /* 544 /*
655 * this is a _very_ stripped down perl interpreter ;) 545 * this is a _very_ stripped down perl interpreter ;)
656 */ 546 */
657 Coro__State ctx = (Coro__State)arg; 547 PL_top_env = &PL_start_env;
658 548
659 ctx->cursp = 0; 549 /* inject call to cctx_init */
660 PL_op = PL_op->op_next; 550 prepare_cctx ((coro_cctx *)arg);
661 CALLRUNOPS(aTHX); 551
662 /*NORETURN*/ 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);
663 abort (); 556 abort ();
664} 557}
665 558
666STATIC 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
667transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 660transfer (struct coro *prev, struct coro *next, int flags)
668{ 661{
669 dSP;
670 dSTACKLEVEL; 662 dSTACKLEVEL;
671 663
664 /* sometimes transfer is only called to set idle_sp */
665 if (flags == TRANSFER_SET_STACKLEVEL)
666 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
672 if (prev != next) 667 else if (prev != next)
673 { 668 {
669 coro_cctx *prev__cctx;
670
671 LOCK;
672
674 if (next->mainstack) 673 if (next->mainstack)
675 { 674 {
675 /* coroutine already started */
676 SAVE (prev, flags); 676 SAVE (prev, flags);
677 LOAD (next); 677 LOAD (next);
678
679 /* mark this state as in-use */
680 next->mainstack = 0;
681 next->tmps_ix = -2;
682
683 /* stacklevel changed? if yes, grab the stack for us! */
684 if (flags & TRANSFER_SAVE_CCTXT)
685 {
686 if (!prev->stack)
687 allocate_stack (prev, 0);
688 else if (prev->cursp != stacklevel
689 && prev->stack->usecnt > 1)
690 {
691 prev->gencnt = ++prev->stack->gencnt;
692 prev->stack->usecnt = 1;
693 }
694
695 /* has our stack been invalidated? */
696 if (next->stack && next->stack->gencnt != next->gencnt)
697 {
698 deallocate_stack (next);
699 allocate_stack (next, 1);
700 coro_create (&(next->stack->cctx),
701 continue_coro, (void *)next,
702 next->stack->sptr, labs (next->stack->ssize));
703 }
704
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706 }
707
708 } 678 }
709 else if (next->tmps_ix == -2)
710 croak ("tried to transfer to running coroutine");
711 else 679 else
712 { 680 {
681 /* need to start coroutine */
713 SAVE (prev, -1); /* first get rid of the old state */ 682 /* first get rid of the old state */
714 683 SAVE (prev, -1);
715 if (flags & TRANSFER_SAVE_CCTXT) 684 /* setup coroutine call */
716 {
717 if (!prev->stack)
718 allocate_stack (prev, 0);
719
720 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
721 {
722 setup_coro (next);
723
724 prev->stack->refcnt++;
725 prev->stack->usecnt++;
726 next->stack = prev->stack;
727 next->gencnt = prev->gencnt;
728 }
729 else
730 {
731 allocate_stack (next, 1);
732 coro_create (&(next->stack->cctx),
733 setup_coro, (void *)next,
734 next->stack->sptr, labs (next->stack->ssize));
735 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
736 }
737 }
738 else
739 setup_coro (next); 685 setup_coro (next);
686 /* need a stack */
687 next->cctx = 0;
740 } 688 }
689
690 if (!prev->cctx)
691 /* create a new empty context */
692 Newz (0, prev->cctx, 1, coro_cctx);
693
694 prev__cctx = prev->cctx;
695
696 /* possibly "free" the cctx */
697 if (prev__cctx->idle_sp == STACKLEVEL)
698 {
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;
741 } 717 }
718}
742 719
743 next->cursp = stacklevel; 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
785static struct coro *
786SvSTATE (SV *coro)
787{
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)
796 {
797 /* very slow, but rare, check */
798 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799 croak ("Coro::State object required");
800 }
801
802 mg = SvMAGIC (coro);
803 assert (mg->mg_type == PERL_MAGIC_ext);
804 return (struct coro *)mg->mg_ptr;
805}
806
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
816api_transfer (SV *prev, SV *next, int flags)
817{
818 dTHX;
819 struct transfer_args ta;
820
821 prepare_transfer (&ta, prev, next, flags);
822 TRANSFER (ta);
823}
824
825/** Coro ********************************************************************/
826
827#define PRIO_MAX 3
828#define PRIO_HIGH 1
829#define PRIO_NORMAL 0
830#define PRIO_LOW -1
831#define PRIO_IDLE -3
832#define PRIO_MIN -4
833
834/* for Coro.pm */
835static GV *coro_current, *coro_idle;
836static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
837static int coro_nready;
838
839static void
840coro_enq (SV *sv)
841{
842 int prio;
843
844 if (SvTYPE (sv) != SVt_PVHV)
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++;
851}
852
853static SV *
854coro_deq (int min_prio)
855{
856 int prio = PRIO_MAX - PRIO_MIN;
857
858 min_prio -= PRIO_MIN;
859 if (min_prio < 0)
860 min_prio = 0;
861
862 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
863 if (AvFILLp (coro_ready [prio]) >= 0)
864 {
865 coro_nready--;
866 return av_shift (coro_ready [prio]);
867 }
868
869 return 0;
870}
871
872static void
873api_ready (SV *coro)
874{
875 dTHX;
876
877 if (SvROK (coro))
878 coro = SvRV (coro);
879
880 LOCK;
881 coro_enq (SvREFCNT_inc (coro));
882 UNLOCK;
883}
884
885static void
886prepare_schedule (struct transfer_args *ta)
887{
888 SV *current, *prev, *next;
889
890 current = GvSV (coro_current);
891
892 for (;;)
893 {
894 LOCK;
895 next = coro_deq (PRIO_MIN);
896 UNLOCK;
897
898 if (next)
899 break;
900
901 {
902 dSP;
903
904 ENTER;
905 SAVETMPS;
906
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);
744} 958}
745 959
746MODULE = Coro::State PACKAGE = Coro::State 960MODULE = Coro::State PACKAGE = Coro::State
747 961
748PROTOTYPES: ENABLE 962PROTOTYPES: DISABLE
749 963
750BOOT: 964BOOT:
751{ /* {} necessary for stoopid perl-5.6.x */ 965{
752 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 966#ifdef USE_ITHREADS
753 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 967 MUTEX_INIT (&coro_mutex);
968#endif
969 BOOT_PAGESIZE;
970
754 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 971 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
755 972
756 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
757 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
758 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
759 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
760
761 if (!padlist_cache)
762 padlist_cache = newHV ();
763 976
764 main_mainstack = PL_mainstack; 977 main_mainstack = PL_mainstack;
765}
766 978
767Coro::State 979 coroapi.ver = CORO_API_VERSION;
768_newprocess(args) 980 coroapi.transfer = api_transfer;
769 SV * args 981
770 PROTOTYPE: $ 982 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
983}
984
985SV *
986new (char *klass, ...)
771 CODE: 987 CODE:
772 Coro__State coro; 988{
989 struct coro *coro;
990 HV *hv;
991 int i;
773 992
774 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
775 croak ("Coro::State::_newprocess expects an arrayref");
776
777 New (0, coro, 1, struct coro); 993 Newz (0, coro, 1, struct coro);
994 coro->args = newAV ();
778 995
779 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 996 hv = newHV ();
780 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;
781 coro->stack = 0; 998 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
782 999
783 RETVAL = coro; 1000 for (i = 1; i < items; i++)
1001 av_push (coro->args, newSVsv (ST (i)));
1002}
784 OUTPUT: 1003 OUTPUT:
785 RETVAL 1004 RETVAL
786 1005
787void 1006void
788transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1007_set_stacklevel (...)
789 Coro::State_or_hashref prev 1008 ALIAS:
790 Coro::State_or_hashref next 1009 Coro::State::transfer = 1
791 int flags 1010 Coro::schedule = 2
792 PROTOTYPE: @ 1011 Coro::cede = 3
1012 Coro::Cont::yield = 4
793 CODE: 1013 CODE:
794 transfer (aTHX_ prev, next, flags); 1014{
1015 struct transfer_args ta;
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}
795 1070
796void 1071void
797DESTROY(coro) 1072_clone_state_from (SV *dst, SV *src)
798 Coro::State coro 1073 CODE:
1074{
1075 struct coro *coro_src = SvSTATE (src);
1076
1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079 ++coro_src->refcnt;
1080 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081}
1082
1083void
1084_exit (code)
1085 int code
1086 PROTOTYPE: $
1087 CODE:
1088 _exit (code);
1089
1090int
1091cctx_count ()
1092 CODE:
1093 RETVAL = cctx_count;
1094 OUTPUT:
1095 RETVAL
1096
1097int
1098cctx_idle ()
1099 CODE:
1100 RETVAL = cctx_idle;
1101 OUTPUT:
1102 RETVAL
1103
1104MODULE = Coro::State PACKAGE = Coro
1105
1106BOOT:
1107{
1108 int i;
1109
1110 coro_stash = gv_stashpv ("Coro", TRUE);
1111
1112 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1113 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1114 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1115 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1116 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1117 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1118
1119 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1120 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1121
1122 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123 coro_ready[i] = newAV ();
1124
1125 {
1126 SV *sv = perl_get_sv("Coro::API", 1);
1127
1128 coroapi.schedule = api_schedule;
1129 coroapi.cede = api_cede;
1130 coroapi.ready = api_ready;
1131 coroapi.nready = &coro_nready;
1132 coroapi.current = coro_current;
1133
1134 GCoroAPI = &coroapi;
1135 sv_setiv (sv, (IV)&coroapi);
1136 SvREADONLY_on (sv);
1137 }
1138}
1139
1140int
1141prio (Coro::State coro, int newprio = 0)
1142 ALIAS:
1143 nice = 1
799 CODE: 1144 CODE:
1145{
1146 RETVAL = coro->prio;
800 1147
801 if (coro->mainstack && coro->mainstack != main_mainstack) 1148 if (items > 1)
802 { 1149 {
803 struct coro temp; 1150 if (ix)
1151 newprio += coro->prio;
804 1152
805 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1153 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
806 LOAD(aTHX_ coro); 1154 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
807 1155
808 destroy_stacks (aTHX); 1156 coro->prio = newprio;
809
810 LOAD((&temp)); /* this will get rid of defsv etc.. */
811
812 coro->mainstack = 0;
813 } 1157 }
814 1158}
815 deallocate_stack (coro);
816
817 Safefree (coro);
818 1159
819void 1160void
820flush() 1161ready (SV *self)
1162 PROTOTYPE: $
821 CODE: 1163 CODE:
822#ifdef MAY_FLUSH 1164 api_ready (self);
823 flush_padlist_cache ();
824#endif
825 1165
1166int
1167nready (...)
1168 PROTOTYPE:
1169 CODE:
1170 RETVAL = coro_nready;
1171 OUTPUT:
1172 RETVAL
1173
826MODULE = Coro::State PACKAGE = Coro::Cont 1174MODULE = Coro::State PACKAGE = Coro::AIO
827 1175
828# this is slightly dirty 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
829 1196
830void 1197void
831yield(...) 1198_set_state (char *data_)
832 PROTOTYPE: @ 1199 PROTOTYPE: $
833 CODE: 1200 CODE:
834 static SV *returnstk; 1201{
835 SV *sv; 1202 struct {
836 AV *defav = GvAV (PL_defgv); 1203 int errorno;
837 struct coro *prev, *next; 1204 int laststype;
1205 int laststatval;
1206 Stat_t statcache;
1207 } *data = (void *)data_;
838 1208
839 if (!returnstk) 1209 errno = data->errorno;
840 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1210 PL_laststype = data->laststype;
841 1211 PL_laststatval = data->laststatval;
842 /* set up @_ -- ugly */ 1212 PL_statcache = data->statcache;
843 av_clear (defav); 1213}
844 av_fill (defav, items - 1);
845 while (items--)
846 av_store (defav, items, SvREFCNT_inc (ST(items)));
847
848 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
849 sv = av_pop ((AV *)SvRV (returnstk));
850 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
851 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
852 SvREFCNT_dec (sv);
853
854 transfer(aTHX_ prev, next, 0);
855

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