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Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC

1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c" 1#include "libcoro/coro.c"
4 2
5#include "EXTERN.h" 3#include "EXTERN.h"
6#include "perl.h" 4#include "perl.h"
7#include "XSUB.h" 5#include "XSUB.h"
8 6
9#include "patchlevel.h" 7#include "patchlevel.h"
10 8
11#if PATCHLEVEL < 6 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)
12# ifndef PL_ppaddr 20# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 21# define PL_ppaddr ppaddr
14# endif 22# endif
15# ifndef call_sv 23# ifndef call_sv
16# define call_sv perl_call_sv 24# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 35# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 36# define IS_PADCONST(v) 0
29# endif 37# endif
30#endif 38#endif
31 39
32#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
33 50
34#ifdef HAVE_MMAP 51#ifdef HAVE_MMAP
35# include <unistd.h> 52# include <unistd.h>
36# include <sys/mman.h> 53# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 56# define MAP_ANONYMOUS MAP_ANON
40# else 57# else
41# undef HAVE_MMAP 58# undef HAVE_MMAP
42# endif 59# endif
43# 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
44#endif 68# endif
45 69#else
46#define SUB_INIT "Coro::State::initialize" 70# define PAGESIZE 0
47#define UCORO_STATE "_coro_state" 71# define BOOT_PAGESIZE (void)0
72#endif
48 73
49/* 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
50 * 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
51 * and should be unique. */ 76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 78#define STACKLEVEL ((void *)&stacklevel)
53 79
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 81
56#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))
57 89
58#include "CoroAPI.h" 90#include "CoroAPI.h"
91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59 93
60#ifdef USE_ITHREADS 94#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 95static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 98#else
65# define LOCK 0 99# define LOCK (void)0
66# define UNLOCK 0 100# define UNLOCK (void)0
67#endif 101#endif
68 102
69static struct CoroAPI coroapi; 103static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 104static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 105static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 106static SV *coro_mortal; /* will be freed after next transfer */
75 107
76/* 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 */
77typedef struct { 112typedef struct coro_cctx {
78 int refcnt; /* pointer reference counter */ 113 struct coro_cctx *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 114
82 coro_context cctx; 115 /* the stack */
83
84 void *sptr; 116 void *sptr;
85 long ssize; /* positive == mmap, otherwise malloc */ 117 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87 118
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 */
88struct coro { 130struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 131 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 132 coro_cctx *cctx;
91 133
92 /* the optional C context */ 134 /* data associated with this coroutine (initial args) */
93 coro_stack *stack; 135 AV *args;
94 void *cursp;
95 int gencnt; 136 int refcnt;
96 137
97 /* optionally saved, might be zero */ 138 /* optionally saved, might be zero */
98 AV *defav; 139 AV *defav;
99 SV *defsv; 140 SV *defsv;
100 SV *errsv; 141 SV *errsv;
101 142
102 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
103 U8 dowarn; 144# include "state.h"
104 I32 in_eval; 145#undef VAR
105 146
106 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
107 PERL_SI *curstackinfo; 148 int prio;
108 AV *curstack;
109 AV *mainstack;
110 SV **stack_sp;
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 COP *curcop;
134 JMPENV *top_env;
135
136 /* data associated with this coroutine (initial args) */
137 AV *args;
138}; 149};
139 150
140typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
141typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
142 153
143/* mostly copied from op.c:cv_clone2 */ 154static AV *
144STATIC AV * 155coro_clone_padlist (CV *cv)
145clone_padlist (pTHX_ AV *protopadlist)
146{ 156{
147 AV *av; 157 AV *padlist = CvPADLIST (cv);
148 I32 ix;
149 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151 SV **pname = AvARRAY (protopad_name);
152 SV **ppad = AvARRAY (protopad);
153 I32 fname = AvFILLp (protopad_name);
154 I32 fpad = AvFILLp (protopad);
155 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
156 SV **npad;
157
158 newpad_name = newAV ();
159 for (ix = fname; ix >= 0; ix--)
160 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162 newpad = newAV ();
163 av_fill (newpad, AvFILLp (protopad));
164 npad = AvARRAY (newpad);
165 159
166 newpadlist = newAV (); 160 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
168 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)));
169 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
170
171 av = newAV (); /* will be @_ */
172 av_extend (av, 0);
173 av_store (newpad, 0, (SV *) av);
174 AvFLAGS (av) = AVf_REIFY;
175
176 for (ix = fpad; ix > 0; ix--)
177 {
178 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180 if (namesv && namesv != &PL_sv_undef)
181 {
182 char *name = SvPVX (namesv); /* XXX */
183
184 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185 { /* lexical from outside? */
186 npad[ix] = SvREFCNT_inc (ppad[ix]);
187 }
188 else
189 { /* our own lexical */
190 SV *sv;
191 if (*name == '&')
192 sv = SvREFCNT_inc (ppad[ix]);
193 else if (*name == '@')
194 sv = (SV *) newAV ();
195 else if (*name == '%')
196 sv = (SV *) newHV ();
197 else
198 sv = NEWSV (0, 0);
199
200#ifdef SvPADBUSY
201 if (!SvPADBUSY (sv))
202#endif
203 SvPADMY_on (sv);
204
205 npad[ix] = sv;
206 }
207 }
208 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209 {
210 npad[ix] = SvREFCNT_inc (ppad[ix]);
211 }
212 else
213 {
214 SV *sv = NEWSV (0, 0);
215 SvPADTMP_on (sv);
216 npad[ix] = sv;
217 }
218 }
219
220#if 0 /* return -ENOTUNDERSTOOD */
221 /* Now that vars are all in place, clone nested closures. */
222
223 for (ix = fpad; ix > 0; ix--) {
224 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225 if (namesv
226 && namesv != &PL_sv_undef
227 && !(SvFLAGS(namesv) & SVf_FAKE)
228 && *SvPVX(namesv) == '&'
229 && CvCLONE(ppad[ix]))
230 {
231 CV *kid = cv_clone((CV*)ppad[ix]);
232 SvREFCNT_dec(ppad[ix]);
233 CvCLONE_on(kid);
234 SvPADMY_on(kid);
235 npad[ix] = (SV*)kid;
236 }
237 }
238#endif
239 172
240 return newpadlist; 173 return newpadlist;
241} 174}
242 175
243STATIC void 176static void
244free_padlist (pTHX_ AV *padlist) 177free_padlist (AV *padlist)
245{ 178{
246 /* may be during global destruction */ 179 /* may be during global destruction */
247 if (SvREFCNT (padlist)) 180 if (SvREFCNT (padlist))
248 { 181 {
249 I32 i = AvFILLp (padlist); 182 I32 i = AvFILLp (padlist);
… …
262 195
263 SvREFCNT_dec ((SV*)padlist); 196 SvREFCNT_dec ((SV*)padlist);
264 } 197 }
265} 198}
266 199
267STATIC int 200static int
268coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 201coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269{ 202{
270 AV *padlist; 203 AV *padlist;
271 AV *av = (AV *)mg->mg_obj; 204 AV *av = (AV *)mg->mg_obj;
272 205
273 /* casting is fun. */ 206 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (aTHX_ padlist); 208 free_padlist (padlist);
276 209
277 SvREFCNT_dec (av); 210 SvREFCNT_dec (av);
211
212 return 0;
278} 213}
279 214
280#define PERL_MAGIC_coro PERL_MAGIC_ext 215#define PERL_MAGIC_coro PERL_MAGIC_ext
281 216
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283 218
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
284/* the next two functions merely cache the padlists */ 226/* the next two functions merely cache the padlists */
285STATIC void 227static void
286get_padlist (pTHX_ CV *cv) 228get_padlist (CV *cv)
287{ 229{
288 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 230 MAGIC *mg = CORO_MAGIC (cv);
231 AV *av;
289 232
290 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 233 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 234 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292 else 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
293 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 244 CvPADLIST (cv) = coro_clone_padlist (cv);
245#endif
246 }
294} 247}
295 248
296STATIC void 249static void
297put_padlist (pTHX_ CV *cv) 250put_padlist (CV *cv)
298{ 251{
299 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 252 MAGIC *mg = CORO_MAGIC (cv);
253 AV *av;
300 254
301 if (!mg) 255 if (!mg)
302 { 256 {
303 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 257 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 258 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305 mg->mg_virtual = &vtbl_coro; 259 mg->mg_virtual = &vtbl_coro;
306 mg->mg_obj = (SV *)newAV (); 260 mg->mg_obj = (SV *)newAV ();
307 } 261 }
308 262
309 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 263 av = (AV *)mg->mg_obj;
264
265 if (AvFILLp (av) >= AvMAX (av))
266 av_extend (av, AvMAX (av) + 1);
267
268 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310} 269}
311 270
312#define SB do { 271#define SB do {
313#define SE } while (0) 272#define SE } while (0)
314 273
315#define LOAD(state) load_state(aTHX_ (state)); 274#define LOAD(state) load_state((state));
316#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 275#define SAVE(state,flags) save_state((state),(flags));
317 276
318#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 277#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
319 278
320static void 279static void
321load_state(pTHX_ Coro__State c) 280load_state(Coro__State c)
322{ 281{
323 PL_dowarn = c->dowarn; 282#define VAR(name,type) PL_ ## name = c->name;
324 PL_in_eval = c->in_eval; 283# include "state.h"
325 284#undef VAR
326 PL_curstackinfo = c->curstackinfo;
327 PL_curstack = c->curstack;
328 PL_mainstack = c->mainstack;
329 PL_stack_sp = c->stack_sp;
330 PL_op = c->op;
331 PL_curpad = c->curpad;
332 PL_comppad = c->comppad;
333 PL_compcv = c->compcv;
334 PL_stack_base = c->stack_base;
335 PL_stack_max = c->stack_max;
336 PL_tmps_stack = c->tmps_stack;
337 PL_tmps_floor = c->tmps_floor;
338 PL_tmps_ix = c->tmps_ix;
339 PL_tmps_max = c->tmps_max;
340 PL_markstack = c->markstack;
341 PL_markstack_ptr = c->markstack_ptr;
342 PL_markstack_max = c->markstack_max;
343 PL_scopestack = c->scopestack;
344 PL_scopestack_ix = c->scopestack_ix;
345 PL_scopestack_max = c->scopestack_max;
346 PL_savestack = c->savestack;
347 PL_savestack_ix = c->savestack_ix;
348 PL_savestack_max = c->savestack_max;
349 PL_retstack = c->retstack;
350 PL_retstack_ix = c->retstack_ix;
351 PL_retstack_max = c->retstack_max;
352 PL_curcop = c->curcop;
353 PL_top_env = c->top_env;
354 285
355 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 286 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 287 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 288 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358 289
… …
361 CV *cv; 292 CV *cv;
362 293
363 /* now do the ugly restore mess */ 294 /* now do the ugly restore mess */
364 while ((cv = (CV *)POPs)) 295 while ((cv = (CV *)POPs))
365 { 296 {
366 AV *padlist = (AV *)POPs;
367
368 if (padlist)
369 {
370 put_padlist (aTHX_ cv); /* mark this padlist as available */ 297 put_padlist (cv); /* mark this padlist as available */
371 CvPADLIST(cv) = padlist; 298 CvDEPTH (cv) = PTR2IV (POPs);
372 } 299 CvPADLIST (cv) = (AV *)POPs;
373
374 ++CvDEPTH(cv);
375 } 300 }
376 301
377 PUTBACK; 302 PUTBACK;
378 } 303 }
379} 304}
380 305
381static void 306static void
382save_state(pTHX_ Coro__State c, int flags) 307save_state(Coro__State c, int flags)
383{ 308{
384 { 309 {
385 dSP; 310 dSP;
386 I32 cxix = cxstack_ix; 311 I32 cxix = cxstack_ix;
387 PERL_CONTEXT *ccstk = cxstack; 312 PERL_CONTEXT *ccstk = cxstack;
… …
401 PERL_CONTEXT *cx = &ccstk[cxix--]; 326 PERL_CONTEXT *cx = &ccstk[cxix--];
402 327
403 if (CxTYPE(cx) == CXt_SUB) 328 if (CxTYPE(cx) == CXt_SUB)
404 { 329 {
405 CV *cv = cx->blk_sub.cv; 330 CV *cv = cx->blk_sub.cv;
331
406 if (CvDEPTH(cv)) 332 if (CvDEPTH (cv))
407 { 333 {
408 EXTEND (SP, CvDEPTH(cv)*2); 334 EXTEND (SP, 3);
409
410 while (--CvDEPTH(cv))
411 {
412 /* this tells the restore code to increment CvDEPTH */
413 PUSHs (Nullsv);
414 PUSHs ((SV *)cv);
415 }
416 335
417 PUSHs ((SV *)CvPADLIST(cv)); 336 PUSHs ((SV *)CvPADLIST(cv));
337 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 338 PUSHs ((SV *)cv);
419 339
420 get_padlist (aTHX_ cv); /* this is a monster */ 340 CvDEPTH (cv) = 0;
341 get_padlist (cv);
421 } 342 }
422 } 343 }
423#ifdef CXt_FORMAT 344#ifdef CXt_FORMAT
424 else if (CxTYPE(cx) == CXt_FORMAT) 345 else if (CxTYPE(cx) == CXt_FORMAT)
425 { 346 {
… …
443 364
444 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;
445 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 366 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 367 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
447 368
448 c->dowarn = PL_dowarn; 369#define VAR(name,type)c->name = PL_ ## name;
449 c->in_eval = PL_in_eval; 370# include "state.h"
450 371#undef VAR
451 c->curstackinfo = PL_curstackinfo;
452 c->curstack = PL_curstack;
453 c->mainstack = PL_mainstack;
454 c->stack_sp = PL_stack_sp;
455 c->op = PL_op;
456 c->curpad = PL_curpad;
457 c->comppad = PL_comppad;
458 c->compcv = PL_compcv;
459 c->stack_base = PL_stack_base;
460 c->stack_max = PL_stack_max;
461 c->tmps_stack = PL_tmps_stack;
462 c->tmps_floor = PL_tmps_floor;
463 c->tmps_ix = PL_tmps_ix;
464 c->tmps_max = PL_tmps_max;
465 c->markstack = PL_markstack;
466 c->markstack_ptr = PL_markstack_ptr;
467 c->markstack_max = PL_markstack_max;
468 c->scopestack = PL_scopestack;
469 c->scopestack_ix = PL_scopestack_ix;
470 c->scopestack_max = PL_scopestack_max;
471 c->savestack = PL_savestack;
472 c->savestack_ix = PL_savestack_ix;
473 c->savestack_max = PL_savestack_max;
474 c->retstack = PL_retstack;
475 c->retstack_ix = PL_retstack_ix;
476 c->retstack_max = PL_retstack_max;
477 c->curcop = PL_curcop;
478 c->top_env = PL_top_env;
479} 372}
480 373
481/* 374/*
482 * allocate various perl stacks. This is an exact copy 375 * allocate various perl stacks. This is an exact copy
483 * of perl.c:init_stacks, except that it uses less memory 376 * of perl.c:init_stacks, except that it uses less memory
484 * on the (sometimes correct) assumption that coroutines do 377 * on the (sometimes correct) assumption that coroutines do
485 * not usually need a lot of stackspace. 378 * not usually need a lot of stackspace.
486 */ 379 */
487STATIC void 380static void
488coro_init_stacks (pTHX) 381coro_init_stacks ()
489{ 382{
490 LOCK;
491
492 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 383 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493 PL_curstackinfo->si_type = PERLSI_MAIN; 384 PL_curstackinfo->si_type = PERLSI_MAIN;
494 PL_curstack = PL_curstackinfo->si_stack; 385 PL_curstack = PL_curstackinfo->si_stack;
495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496 387
… …
517 408
518 New(54,PL_savestack,96,ANY); 409 New(54,PL_savestack,96,ANY);
519 PL_savestack_ix = 0; 410 PL_savestack_ix = 0;
520 PL_savestack_max = 96; 411 PL_savestack_max = 96;
521 412
413#if !PERL_VERSION_ATLEAST (5,9,0)
522 New(54,PL_retstack,8,OP*); 414 New(54,PL_retstack,8,OP*);
523 PL_retstack_ix = 0; 415 PL_retstack_ix = 0;
524 PL_retstack_max = 8; 416 PL_retstack_max = 8;
525 417#endif
526 UNLOCK;
527} 418}
528 419
529/* 420/*
530 * destroy the stacks, the callchain etc... 421 * destroy the stacks, the callchain etc...
531 */ 422 */
532STATIC void 423static void
533destroy_stacks(pTHX) 424coro_destroy_stacks ()
534{ 425{
535 if (!IN_DESTRUCT) 426 if (!IN_DESTRUCT)
536 { 427 {
537 /* is this ugly, I ask? */ 428 /* is this ugly, I ask? */
538 LEAVE_SCOPE (0); 429 LEAVE_SCOPE (0);
… …
569 460
570 Safefree (PL_tmps_stack); 461 Safefree (PL_tmps_stack);
571 Safefree (PL_markstack); 462 Safefree (PL_markstack);
572 Safefree (PL_scopestack); 463 Safefree (PL_scopestack);
573 Safefree (PL_savestack); 464 Safefree (PL_savestack);
465#if !PERL_VERSION_ATLEAST (5,9,0)
574 Safefree (PL_retstack); 466 Safefree (PL_retstack);
575}
576
577static void
578allocate_stack (Coro__State ctx, int alloc)
579{
580 coro_stack *stack;
581
582 New (0, stack, 1, coro_stack);
583
584 stack->refcnt = 1;
585 stack->usecnt = 1;
586 stack->gencnt = ctx->gencnt = 0;
587
588 if (alloc)
589 {
590#if HAVE_MMAP
591 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593 if (stack->sptr == (void *)-1)
594#endif 467#endif
595 {
596 /*FIXME*//*D*//* reasonable stack size! */
597 stack->ssize = - (8192 * sizeof (long));
598 New (0, stack->sptr, 8192, long);
599 }
600 }
601 else
602 stack->sptr = 0;
603
604 ctx->stack = stack;
605} 468}
606 469
607static void 470static void
608deallocate_stack (Coro__State ctx) 471setup_coro (struct coro *coro)
609{
610 coro_stack *stack = ctx->stack;
611
612 ctx->stack = 0;
613
614 if (stack)
615 {
616 if (!--stack->refcnt)
617 {
618#ifdef HAVE_MMAP
619 if (stack->ssize > 0 && stack->sptr)
620 munmap (stack->sptr, stack->ssize);
621 else
622#endif
623 Safefree (stack->sptr);
624
625 Safefree (stack);
626 }
627 else if (ctx->gencnt == stack->gencnt)
628 --stack->usecnt;
629 }
630}
631
632static void
633setup_coro (void *arg)
634{ 472{
635 /* 473 /*
636 * emulate part of the perl startup here. 474 * emulate part of the perl startup here.
637 */ 475 */
638 dTHX;
639 dSP;
640 Coro__State ctx = (Coro__State)arg;
641 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642 476
643 coro_init_stacks (aTHX); 477 coro_init_stacks ();
478
644 /*PL_curcop = 0;*/ 479 PL_curcop = 0;
645 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 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
646 SvREFCNT_dec (GvAV (PL_defgv)); 490 SvREFCNT_dec (GvAV (PL_defgv));
647 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 491 GvAV (PL_defgv) = coro->args; coro->args = 0;
648 492
649 SPAGAIN;
650
651 if (ctx->stack)
652 {
653 ctx->cursp = 0;
654
655 PUSHMARK(SP);
656 PUTBACK;
657 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659 if (SvTRUE (ERRSV))
660 croak (NULL);
661 else
662 croak ("FATAL: CCTXT coroutine returned!");
663 }
664 else
665 {
666 UNOP myop;
667
668 PL_op = (OP *)&myop;
669
670 Zero(&myop, 1, UNOP); 493 Zero (&myop, 1, LOGOP);
671 myop.op_next = Nullop; 494 myop.op_next = Nullop;
672 myop.op_flags = OPf_WANT_VOID; 495 myop.op_flags = OPf_WANT_VOID;
673 496
497 PL_op = (OP *)&myop;
498
674 PUSHMARK(SP); 499 PUSHMARK (SP);
675 XPUSHs (sub_init); 500 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
676 /*
677 * the next line is slightly wrong, as PL_op->op_next
678 * is actually being executed so we skip the first op.
679 * that doesn't matter, though, since it is only
680 * pp_nextstate and we never return...
681 * ah yes, and I don't care anyways ;)
682 */
683 PUTBACK; 501 PUTBACK;
684 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 502 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685 SPAGAIN; 503 SPAGAIN;
686 504
687 ENTER; /* necessary e.g. for dounwind */ 505 ENTER; /* necessary e.g. for dounwind */
688 } 506 }
689} 507}
690 508
691static void 509static void
692continue_coro (void *arg) 510free_coro_mortal ()
693{ 511{
694 /*
695 * this is a _very_ stripped down perl interpreter ;)
696 */
697 dTHX;
698 Coro__State ctx = (Coro__State)arg;
699 JMPENV coro_start_env;
700
701 PL_top_env = &ctx->start_env;
702
703 ctx->cursp = 0;
704 PL_op = PL_op->op_next;
705 CALLRUNOPS(aTHX);
706
707 abort ();
708}
709
710STATIC void
711transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712{
713 dSTACKLEVEL;
714
715 if (prev != next)
716 {
717 if (next->mainstack)
718 {
719 LOCK;
720 SAVE (prev, flags);
721 LOAD (next);
722 UNLOCK;
723
724 /* mark this state as in-use */
725 next->mainstack = 0;
726 next->tmps_ix = -2;
727
728 /* stacklevel changed? if yes, grab the stack for us! */
729 if (flags & TRANSFER_SAVE_CCTXT)
730 {
731 if (!prev->stack)
732 allocate_stack (prev, 0);
733 else if (prev->cursp != stacklevel
734 && prev->stack->usecnt > 1)
735 {
736 prev->gencnt = ++prev->stack->gencnt;
737 prev->stack->usecnt = 1;
738 }
739
740 /* has our stack been invalidated? */
741 if (next->stack && next->stack->gencnt != next->gencnt)
742 {
743 deallocate_stack (next);
744 allocate_stack (next, 1);
745 coro_create (&(next->stack->cctx),
746 continue_coro, (void *)next,
747 next->stack->sptr, labs (next->stack->ssize));
748 }
749
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 }
754 else
755 next->cursp = stacklevel;
756 }
757 else if (next->tmps_ix == -2)
758 croak ("tried to transfer to running coroutine");
759 else
760 {
761 LOCK;
762 SAVE (prev, -1); /* first get rid of the old state */
763 UNLOCK;
764
765 if (flags & TRANSFER_SAVE_CCTXT)
766 {
767 if (!prev->stack)
768 allocate_stack (prev, 0);
769
770 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771 {
772 PL_top_env = &next->start_env;
773
774 setup_coro (next);
775 next->cursp = stacklevel;
776
777 prev->stack->refcnt++;
778 prev->stack->usecnt++;
779 next->stack = prev->stack;
780 next->gencnt = prev->gencnt;
781 }
782 else
783 {
784 assert (!next->stack);
785 allocate_stack (next, 1);
786 coro_create (&(next->stack->cctx),
787 setup_coro, (void *)next,
788 next->stack->sptr, labs (next->stack->ssize));
789 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790 prev->cursp = stacklevel;
791 /* don't add any code here */
792 }
793 }
794 else
795 {
796 setup_coro (next);
797 next->cursp = stacklevel;
798 }
799 }
800 }
801
802 LOCK;
803 if (coro_mortal) 512 if (coro_mortal)
804 { 513 {
805 SvREFCNT_dec (coro_mortal); 514 SvREFCNT_dec (coro_mortal);
806 coro_mortal = 0; 515 coro_mortal = 0;
807 } 516 }
517}
518
519static void NOINLINE
520prepare_cctx (coro_cctx *cctx)
521{
522 dSP;
523 LOGOP myop;
524
525 Zero (&myop, 1, LOGOP);
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);
535 SPAGAIN;
536}
537
538static void
539coro_run (void *arg)
540{
541 /* coro_run is the alternative epilogue of transfer() */
808 UNLOCK; 542 UNLOCK;
809}
810 543
811#define SV_CORO(sv,func) \ 544 /*
812 do { \ 545 * this is a _very_ stripped down perl interpreter ;)
813 if (SvROK (sv)) \ 546 */
814 sv = SvRV (sv); \ 547 PL_top_env = &PL_start_env;
815 \
816 if (SvTYPE (sv) == SVt_PVHV) \
817 { \
818 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819 \
820 if (!he) \
821 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822 \
823 (sv) = SvRV (HeVAL(he)); \
824 } \
825 \
826 /* must also be changed inside Coro::Cont::yield */ \
827 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829 \
830 } while(0)
831 548
832#define SvSTATE(sv) (struct coro *)SvIV (sv) 549 /* inject call to cctx_init */
550 prepare_cctx ((coro_cctx *)arg);
833 551
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);
556 abort ();
557}
558
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
660transfer (struct coro *prev, struct coro *next, int flags)
661{
662 dSTACKLEVEL;
663
664 /* sometimes transfer is only called to set idle_sp */
665 if (flags == TRANSFER_SET_STACKLEVEL)
666 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
667 else if (prev != next)
668 {
669 coro_cctx *prev__cctx;
670
671 LOCK;
672
673 if (next->mainstack)
674 {
675 /* coroutine already started */
676 SAVE (prev, flags);
677 LOAD (next);
678 }
679 else
680 {
681 /* need to start coroutine */
682 /* first get rid of the old state */
683 SAVE (prev, -1);
684 /* setup coroutine call */
685 setup_coro (next);
686 /* need a stack */
687 next->cctx = 0;
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 cctx_put (prev__cctx);
700 prev->cctx = 0;
701 }
702
703 if (!next->cctx)
704 next->cctx = cctx_get ();
705
706 if (prev__cctx != next->cctx)
707 {
708 prev__cctx->top_env = PL_top_env;
709 PL_top_env = next->cctx->top_env;
710 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
711 }
712
713 free_coro_mortal ();
714
715 UNLOCK;
716 }
717}
718
719struct transfer_args
720{
721 struct coro *prev, *next;
722 int flags;
723};
724
725#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
726
727static void
728coro_state_destroy (struct coro *coro)
729{
730 if (coro->refcnt--)
731 return;
732
733 if (coro->mainstack && coro->mainstack != main_mainstack)
734 {
735 struct coro temp;
736
737 SAVE ((&temp), TRANSFER_SAVE_ALL);
738 LOAD (coro);
739
740 coro_destroy_stacks ();
741
742 LOAD ((&temp)); /* this will get rid of defsv etc.. */
743
744 coro->mainstack = 0;
745 }
746
747 cctx_free (coro->cctx);
748 SvREFCNT_dec (coro->args);
749 Safefree (coro);
750}
751
834static void 752static int
753coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
754{
755 struct coro *coro = (struct coro *)mg->mg_ptr;
756 mg->mg_ptr = 0;
757
758 coro_state_destroy (coro);
759
760 return 0;
761}
762
763static int
764coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
765{
766 struct coro *coro = (struct coro *)mg->mg_ptr;
767
768 ++coro->refcnt;
769
770 return 0;
771}
772
773static MGVTBL coro_state_vtbl = {
774 0, 0, 0, 0,
775 coro_state_clear,
776 0,
777#ifdef MGf_DUP
778 coro_state_dup,
779#else
780# define MGf_DUP 0
781#endif
782};
783
784static struct coro *
785SvSTATE (SV *coro)
786{
787 HV *stash;
788 MAGIC *mg;
789
790 if (SvROK (coro))
791 coro = SvRV (coro);
792
793 stash = SvSTASH (coro);
794 if (stash != coro_stash && stash != coro_state_stash)
795 {
796 /* very slow, but rare, check */
797 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
798 croak ("Coro::State object required");
799 }
800
801 mg = SvMAGIC (coro);
802 assert (mg->mg_type == PERL_MAGIC_ext);
803 return (struct coro *)mg->mg_ptr;
804}
805
806static void
807prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
808{
809 ta->prev = SvSTATE (prev);
810 ta->next = SvSTATE (next);
811 ta->flags = flags;
812}
813
814static void
835api_transfer(pTHX_ SV *prev, SV *next, int flags) 815api_transfer (SV *prev, SV *next, int flags)
836{ 816{
837 SV_CORO (prev, "Coro::transfer"); 817 dTHX;
838 SV_CORO (next, "Coro::transfer"); 818 struct transfer_args ta;
839 819
840 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 820 prepare_transfer (&ta, prev, next, flags);
821 TRANSFER (ta);
841} 822}
842 823
843/** Coro ********************************************************************/ 824/** Coro ********************************************************************/
844 825
845#define PRIO_MAX 3 826#define PRIO_MAX 3
… …
849#define PRIO_IDLE -3 830#define PRIO_IDLE -3
850#define PRIO_MIN -4 831#define PRIO_MIN -4
851 832
852/* for Coro.pm */ 833/* for Coro.pm */
853static GV *coro_current, *coro_idle; 834static GV *coro_current, *coro_idle;
854static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 835static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855static int coro_nready; 836static int coro_nready;
856 837
857static void 838static void
858coro_enq (pTHX_ SV *sv) 839coro_enq (SV *sv)
859{ 840{
841 int prio;
842
860 if (SvTYPE (sv) == SVt_PVHV) 843 if (SvTYPE (sv) != SVt_PVHV)
861 {
862 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865 prio = prio > PRIO_MAX ? PRIO_MAX
866 : prio < PRIO_MIN ? PRIO_MIN
867 : prio;
868
869 av_push (coro_ready [prio - PRIO_MIN], sv);
870 coro_nready++;
871
872 return;
873 }
874
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 844 croak ("Coro::ready tried to enqueue something that is not a coroutine");
845
846 prio = SvSTATE (sv)->prio;
847
848 av_push (coro_ready [prio - PRIO_MIN], sv);
849 coro_nready++;
876} 850}
877 851
878static SV * 852static SV *
879coro_deq (pTHX_ int min_prio) 853coro_deq (int min_prio)
880{ 854{
881 int prio = PRIO_MAX - PRIO_MIN; 855 int prio = PRIO_MAX - PRIO_MIN;
882 856
883 min_prio -= PRIO_MIN; 857 min_prio -= PRIO_MIN;
884 if (min_prio < 0) 858 if (min_prio < 0)
885 min_prio = 0; 859 min_prio = 0;
886 860
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 861 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888 if (av_len (coro_ready[prio]) >= 0) 862 if (AvFILLp (coro_ready [prio]) >= 0)
889 { 863 {
890 coro_nready--; 864 coro_nready--;
891 return av_shift (coro_ready[prio]); 865 return av_shift (coro_ready [prio]);
892 } 866 }
893 867
894 return 0; 868 return 0;
895} 869}
896 870
… …
901 875
902 if (SvROK (coro)) 876 if (SvROK (coro))
903 coro = SvRV (coro); 877 coro = SvRV (coro);
904 878
905 LOCK; 879 LOCK;
906 coro_enq (aTHX_ SvREFCNT_inc (coro)); 880 coro_enq (SvREFCNT_inc (coro));
907 UNLOCK; 881 UNLOCK;
908} 882}
909 883
910static void 884static void
885prepare_schedule (struct transfer_args *ta)
886{
887 SV *current, *prev, *next;
888
889 current = GvSV (coro_current);
890
891 for (;;)
892 {
893 LOCK;
894 next = coro_deq (PRIO_MIN);
895 UNLOCK;
896
897 if (next)
898 break;
899
900 {
901 dSP;
902
903 ENTER;
904 SAVETMPS;
905
906 PUSHMARK (SP);
907 PUTBACK;
908 call_sv (GvSV (coro_idle), G_DISCARD);
909
910 FREETMPS;
911 LEAVE;
912 }
913 }
914
915 prev = SvRV (current);
916 SvRV (current) = next;
917
918 /* free this only after the transfer */
919 LOCK;
920 free_coro_mortal ();
921 UNLOCK;
922 coro_mortal = prev;
923
924 ta->prev = SvSTATE (prev);
925 ta->next = SvSTATE (next);
926 ta->flags = TRANSFER_SAVE_ALL;
927}
928
929static void
930prepare_cede (struct transfer_args *ta)
931{
932 LOCK;
933 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
934 UNLOCK;
935
936 prepare_schedule (ta);
937}
938
939static void
911api_schedule (void) 940api_schedule (void)
912{ 941{
913 dTHX; 942 dTHX;
943 struct transfer_args ta;
914 944
915 SV *prev, *next; 945 prepare_schedule (&ta);
916 946 TRANSFER (ta);
917 LOCK;
918
919 prev = SvRV (GvSV (coro_current));
920 next = coro_deq (aTHX_ PRIO_MIN);
921
922 if (!next)
923 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925 /* free this only after the transfer */
926 coro_mortal = prev;
927 SV_CORO (prev, "Coro::schedule");
928
929 SvRV (GvSV (coro_current)) = next;
930
931 SV_CORO (next, "Coro::schedule");
932
933 UNLOCK;
934
935 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937} 947}
938 948
939static void 949static void
940api_cede (void) 950api_cede (void)
941{ 951{
942 dTHX; 952 dTHX;
953 struct transfer_args ta;
943 954
944 LOCK; 955 prepare_cede (&ta);
945 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 956 TRANSFER (ta);
946 UNLOCK;
947
948 api_schedule ();
949} 957}
950 958
951MODULE = Coro::State PACKAGE = Coro::State 959MODULE = Coro::State PACKAGE = Coro::State
952 960
953PROTOTYPES: ENABLE 961PROTOTYPES: DISABLE
954 962
955BOOT: 963BOOT:
956{ /* {} necessary for stoopid perl-5.6.x */ 964{
957#ifdef USE_ITHREADS 965#ifdef USE_ITHREADS
958 MUTEX_INIT (&coro_mutex); 966 MUTEX_INIT (&coro_mutex);
959#endif 967#endif
968 BOOT_PAGESIZE;
960 969
961 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 970 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964 971
965 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969 975
970 main_mainstack = PL_mainstack; 976 main_mainstack = PL_mainstack;
971 977
972 coroapi.ver = CORO_API_VERSION; 978 coroapi.ver = CORO_API_VERSION;
973 coroapi.transfer = api_transfer; 979 coroapi.transfer = api_transfer;
974}
975 980
976Coro::State 981 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977_newprocess(args) 982}
978 SV * args 983
979 PROTOTYPE: $ 984SV *
985new (char *klass, ...)
980 CODE: 986 CODE:
981 Coro__State coro; 987{
988 struct coro *coro;
989 HV *hv;
990 int i;
982 991
983 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984 croak ("Coro::State::_newprocess expects an arrayref");
985
986 Newz (0, coro, 1, struct coro); 992 Newz (0, coro, 1, struct coro);
993 coro->args = newAV ();
987 994
988 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 995 hv = newHV ();
989 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 996 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
990 /*coro->stack = 0;*/ 997 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991 998
992 /* same as JMPENV_BOOTSTRAP */ 999 for (i = 1; i < items; i++)
993 /* we might be able to recycle start_env, but safe is safe */ 1000 av_push (coro->args, newSVsv (ST (i)));
994 /*Zero(&coro->start_env, 1, JMPENV);*/ 1001}
995 coro->start_env.je_ret = -1;
996 coro->start_env.je_mustcatch = TRUE;
997
998 RETVAL = coro;
999 OUTPUT: 1002 OUTPUT:
1000 RETVAL 1003 RETVAL
1001 1004
1002void 1005void
1003transfer(prev, next, flags) 1006_set_stacklevel (...)
1004 SV *prev 1007 ALIAS:
1005 SV *next 1008 Coro::State::transfer = 1
1006 int flags 1009 Coro::schedule = 2
1007 PROTOTYPE: @ 1010 Coro::cede = 3
1011 Coro::Cont::yield = 4
1008 CODE: 1012 CODE:
1009 PUTBACK; 1013{
1010 SV_CORO (next, "Coro::transfer"); 1014 struct transfer_args ta;
1011 SV_CORO (prev, "Coro::transfer"); 1015
1012 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1016 switch (ix)
1013 SPAGAIN; 1017 {
1018 case 0:
1019 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1020 ta.next = 0;
1021 ta.flags = TRANSFER_SET_STACKLEVEL;
1022 break;
1023
1024 case 1:
1025 if (items != 3)
1026 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1027
1028 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1029 break;
1030
1031 case 2:
1032 prepare_schedule (&ta);
1033 break;
1034
1035 case 3:
1036 prepare_cede (&ta);
1037 break;
1038
1039 case 4:
1040 {
1041 SV *yieldstack;
1042 SV *sv;
1043 AV *defav = GvAV (PL_defgv);
1044
1045 yieldstack = *hv_fetch (
1046 (HV *)SvRV (GvSV (coro_current)),
1047 "yieldstack", sizeof ("yieldstack") - 1,
1048 0
1049 );
1050
1051 /* set up @_ -- ugly */
1052 av_clear (defav);
1053 av_fill (defav, items - 1);
1054 while (items--)
1055 av_store (defav, items, SvREFCNT_inc (ST(items)));
1056
1057 sv = av_pop ((AV *)SvRV (yieldstack));
1058 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1059 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1060 ta.flags = 0;
1061 SvREFCNT_dec (sv);
1062 }
1063 break;
1064
1065 }
1066
1067 TRANSFER (ta);
1068}
1014 1069
1015void 1070void
1016DESTROY(coro) 1071_clone_state_from (SV *dst, SV *src)
1017 Coro::State coro 1072 CODE:
1018 CODE: 1073{
1074 struct coro *coro_src = SvSTATE (src);
1019 1075
1020 if (coro->mainstack && coro->mainstack != main_mainstack) 1076 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021 {
1022 struct coro temp;
1023 1077
1024 PUTBACK; 1078 ++coro_src->refcnt;
1025 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1079 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1026 LOAD (aTHX_ coro); 1080}
1027 SPAGAIN;
1028
1029 destroy_stacks (aTHX);
1030
1031 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032 SPAGAIN;
1033
1034 coro->mainstack = 0;
1035 }
1036
1037 deallocate_stack (coro);
1038 SvREFCNT_dec (coro->args);
1039 Safefree (coro);
1040 1081
1041void 1082void
1042_exit(code) 1083_exit (code)
1043 int code 1084 int code
1044 PROTOTYPE: $ 1085 PROTOTYPE: $
1045 CODE: 1086 CODE:
1046 _exit (code); 1087 _exit (code);
1047 1088
1048MODULE = Coro::State PACKAGE = Coro::Cont 1089int
1090cctx_count ()
1091 CODE:
1092 RETVAL = cctx_count;
1093 OUTPUT:
1094 RETVAL
1049 1095
1050# this is slightly dirty (should expose a c-level api) 1096int
1051 1097cctx_idle ()
1052void 1098 CODE:
1053yield(...) 1099 RETVAL = cctx_idle;
1054 PROTOTYPE: @ 1100 OUTPUT:
1055 CODE: 1101 RETVAL
1056 static SV *returnstk;
1057 SV *sv;
1058 AV *defav = GvAV (PL_defgv);
1059 struct coro *prev, *next;
1060
1061 if (!returnstk)
1062 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064 /* set up @_ -- ugly */
1065 av_clear (defav);
1066 av_fill (defav, items - 1);
1067 while (items--)
1068 av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070 SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071 sv = av_pop ((AV *)SvRV (returnstk));
1072 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074 SvREFCNT_dec (sv);
1075
1076 transfer (aTHX_ prev, next, 0);
1077 1102
1078MODULE = Coro::State PACKAGE = Coro 1103MODULE = Coro::State PACKAGE = Coro
1079 1104
1080# this is slightly dirty (should expose a c-level api)
1081
1082BOOT: 1105BOOT:
1083{ 1106{
1084 int i; 1107 int i;
1108
1085 HV *stash = gv_stashpv ("Coro", TRUE); 1109 coro_stash = gv_stashpv ("Coro", TRUE);
1086 1110
1087 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1111 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1112 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1113 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1114 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1115 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1116 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093 1117
1094 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1118 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1119 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096 1120
1097 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1121 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
… …
1105 coroapi.ready = api_ready; 1129 coroapi.ready = api_ready;
1106 coroapi.nready = &coro_nready; 1130 coroapi.nready = &coro_nready;
1107 coroapi.current = coro_current; 1131 coroapi.current = coro_current;
1108 1132
1109 GCoroAPI = &coroapi; 1133 GCoroAPI = &coroapi;
1110 sv_setiv(sv, (IV)&coroapi); 1134 sv_setiv (sv, (IV)&coroapi);
1111 SvREADONLY_on(sv); 1135 SvREADONLY_on (sv);
1112 } 1136 }
1113} 1137}
1114 1138
1115#if !PERL_MICRO 1139int
1140prio (Coro::State coro, int newprio = 0)
1141 ALIAS:
1142 nice = 1
1143 CODE:
1144{
1145 RETVAL = coro->prio;
1146
1147 if (items > 1)
1148 {
1149 if (ix)
1150 newprio += coro->prio;
1151
1152 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1153 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1154
1155 coro->prio = newprio;
1156 }
1157}
1116 1158
1117void 1159void
1118ready(self) 1160ready (SV *self)
1119 SV * self
1120 PROTOTYPE: $ 1161 PROTOTYPE: $
1121 CODE: 1162 CODE:
1122 api_ready (self); 1163 api_ready (self);
1123 1164
1124#endif
1125
1126int 1165int
1127nready(...) 1166nready (...)
1128 PROTOTYPE: 1167 PROTOTYPE:
1129 CODE: 1168 CODE:
1130 RETVAL = coro_nready; 1169 RETVAL = coro_nready;
1131 OUTPUT: 1170 OUTPUT:
1132 RETVAL 1171 RETVAL
1133 1172
1173MODULE = Coro::State PACKAGE = Coro::AIO
1174
1175SV *
1176_get_state ()
1177 CODE:
1178{
1179 struct {
1180 int errorno;
1181 int laststype;
1182 int laststatval;
1183 Stat_t statcache;
1184 } data;
1185
1186 data.errorno = errno;
1187 data.laststype = PL_laststype;
1188 data.laststatval = PL_laststatval;
1189 data.statcache = PL_statcache;
1190
1191 RETVAL = newSVpvn ((char *)&data, sizeof data);
1192}
1193 OUTPUT:
1194 RETVAL
1195
1134void 1196void
1135schedule(...) 1197_set_state (char *data_)
1136 PROTOTYPE: 1198 PROTOTYPE: $
1137 CODE: 1199 CODE:
1138 api_schedule (); 1200{
1201 struct {
1202 int errorno;
1203 int laststype;
1204 int laststatval;
1205 Stat_t statcache;
1206 } *data = (void *)data_;
1139 1207
1140void 1208 errno = data->errorno;
1141cede(...) 1209 PL_laststype = data->laststype;
1142 PROTOTYPE: 1210 PL_laststatval = data->laststatval;
1143 CODE: 1211 PL_statcache = data->statcache;
1144 api_cede (); 1212}
1145

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