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Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.129 by root, Fri Dec 22 04:34:04 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 PERL_VERSION < 6 9#include <stdio.h>
10#include <errno.h>
11#include <assert.h>
12
13#ifdef HAVE_MMAP
14# include <unistd.h>
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif
22# endif
23# include <limits.h>
24# ifndef PAGESIZE
25# define PAGESIZE pagesize
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
27static long pagesize;
28# else
29# define BOOT_PAGESIZE (void)0
30# endif
31#else
32# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0
34#endif
35
36#if USE_VALGRIND
37# include <valgrind/valgrind.h>
38#endif
39
40/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8
42
43#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48
49#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 50# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 51# define PL_ppaddr ppaddr
14# endif 52# endif
15# ifndef call_sv 53# ifndef call_sv
16# define call_sv perl_call_sv 54# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 65# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 66# define IS_PADCONST(v) 0
29# endif 67# endif
30#endif 68#endif
31 69
32#include <errno.h> 70/* 5.8.7 */
71#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
33 74
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 76# undef STACKGUARD
36#endif 77#endif
37 78
38#ifndef STACKGUARD 79#ifndef STACKGUARD
39# define STACKGUARD 0 80# define STACKGUARD 0
40#endif 81#endif
41 82
42#ifdef HAVE_MMAP 83/* prefer perl internal functions over our own? */
43# include <unistd.h> 84#ifndef PREFER_PERL_FUNCTIONS
44# include <sys/mman.h> 85# define PREFER_PERL_FUNCTIONS 0
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif 86#endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64 87
65/* The next macro should declare a variable stacklevel that contains and approximation 88/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call 89 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */ 90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
68#define dSTACKLEVEL void *stacklevel = &stacklevel 92#define STACKLEVEL ((void *)&stacklevel)
69 93
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
71 95
72#define labs(l) ((l) >= 0 ? (l) : -(l)) 96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98#else
99# define attribute(x)
100#endif
101
102#define NOINLINE attribute ((noinline))
73 103
74#include "CoroAPI.h" 104#include "CoroAPI.h"
75 105
76#ifdef USE_ITHREADS 106#ifdef USE_ITHREADS
77static perl_mutex coro_mutex; 107static perl_mutex coro_mutex;
… …
80#else 110#else
81# define LOCK (void)0 111# define LOCK (void)0
82# define UNLOCK (void)0 112# define UNLOCK (void)0
83#endif 113#endif
84 114
115struct io_state
116{
117 int errorno;
118 I32 laststype;
119 int laststatval;
120 Stat_t statcache;
121};
122
85static struct CoroAPI coroapi; 123static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 124static AV *main_mainstack; /* used to differentiate between $main and others */
87static HV *coro_state_stash; 125static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 126static SV *coro_mortal; /* will be freed after next transfer */
91 127
92/* this is actually not only the c stack but also c registers etc... */ 128static struct coro_cctx *cctx_first;
129static int cctx_count, cctx_idle;
130
131/* this is a structure representing a c-level coroutine */
93typedef struct { 132typedef struct coro_cctx {
94 int refcnt; /* pointer reference counter */ 133 struct coro_cctx *next;
95 int usecnt; /* shared by how many coroutines */
96 int gencnt; /* generation counter */
97 134
98 coro_context cctx; 135 /* the stack */
99
100 void *sptr; 136 void *sptr;
101 long ssize; /* positive == mmap, otherwise malloc */ 137 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103 138
139 /* cpu state */
140 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
141 JMPENV *top_env;
142 coro_context cctx;
143
144 int inuse;
145
146#if USE_VALGRIND
147 int valgrind_id;
148#endif
149} coro_cctx;
150
151enum {
152 CF_RUNNING = 0x0001, /* coroutine is running */
153 CF_READY = 0x0002, /* coroutine is ready */
154 CF_NEW = 0x0004, /* ahs never been switched to */
155};
156
157/* this is a structure representing a perl-level coroutine */
104struct coro { 158struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 159 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 160 coro_cctx *cctx;
107
108 /* the optional C context */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack;
126 SV **stack_sp;
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 161
153 /* data associated with this coroutine (initial args) */ 162 /* data associated with this coroutine (initial args) */
154 AV *args; 163 AV *args;
164 int refcnt;
165 int save; /* CORO_SAVE flags */
166 int flags; /* CF_ flags */
167
168 /* optionally saved, might be zero */
169 AV *defav; /* @_ */
170 SV *defsv; /* $_ */
171 SV *errsv; /* $@ */
172 SV *irssv; /* $/ */
173 SV *irssv_sv; /* real $/ cache */
174
175#define VAR(name,type) type name;
176# include "state.h"
177#undef VAR
178
179 /* coro process data */
180 int prio;
155}; 181};
156 182
157typedef struct coro *Coro__State; 183typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 184typedef struct coro *Coro__State_or_hashref;
159 185
160static AV * 186static AV *
161coro_clone_padlist (pTHX_ CV *cv) 187coro_clone_padlist (CV *cv)
162{ 188{
163 AV *padlist = CvPADLIST (cv); 189 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 190 AV *newpadlist, *newpad;
165 191
166 newpadlist = newAV (); 192 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 193 AvREAL_off (newpadlist);
168#if PERL_VERSION < 9 194#if PERL_VERSION_ATLEAST (5,9,0)
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
196#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#endif 198#endif
173 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 199 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174 --AvFILLp (padlist); 200 --AvFILLp (padlist);
175 201
176 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 202 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
178 204
179 return newpadlist; 205 return newpadlist;
180} 206}
181 207
182static void 208static void
183free_padlist (pTHX_ AV *padlist) 209free_padlist (AV *padlist)
184{ 210{
185 /* may be during global destruction */ 211 /* may be during global destruction */
186 if (SvREFCNT (padlist)) 212 if (SvREFCNT (padlist))
187 { 213 {
188 I32 i = AvFILLp (padlist); 214 I32 i = AvFILLp (padlist);
… …
209 AV *padlist; 235 AV *padlist;
210 AV *av = (AV *)mg->mg_obj; 236 AV *av = (AV *)mg->mg_obj;
211 237
212 /* casting is fun. */ 238 /* casting is fun. */
213 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 239 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214 free_padlist (aTHX_ padlist); 240 free_padlist (padlist);
215 241
216 SvREFCNT_dec (av); 242 SvREFCNT_dec (av);
217 243
218 return 0; 244 return 0;
219} 245}
220 246
221#define PERL_MAGIC_coro PERL_MAGIC_ext 247#define PERL_MAGIC_coro PERL_MAGIC_ext
222 248
223static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 249static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224 250
251#define CORO_MAGIC(cv) \
252 SvMAGIC (cv) \
253 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254 ? SvMAGIC (cv) \
255 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
256 : 0
257
225/* the next two functions merely cache the padlists */ 258/* the next two functions merely cache the padlists */
226static void 259static void
227get_padlist (pTHX_ CV *cv) 260get_padlist (CV *cv)
228{ 261{
229 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 262 MAGIC *mg = CORO_MAGIC (cv);
263 AV *av;
230 264
231 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 265 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 266 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233 else 267 else
234 { 268 {
235#if 0 269#if PREFER_PERL_FUNCTIONS
236 /* this should work - but it doesn't :( */ 270 /* this is probably cleaner, but also slower? */
237 CV *cp = Perl_cv_clone (aTHX_ cv); 271 CV *cp = Perl_cv_clone (cv);
238 CvPADLIST (cv) = CvPADLIST (cp); 272 CvPADLIST (cv) = CvPADLIST (cp);
239 CvPADLIST (cp) = 0; 273 CvPADLIST (cp) = 0;
240 SvREFCNT_dec (cp); 274 SvREFCNT_dec (cp);
241#else 275#else
242 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 276 CvPADLIST (cv) = coro_clone_padlist (cv);
243#endif 277#endif
244 } 278 }
245} 279}
246 280
247static void 281static void
248put_padlist (pTHX_ CV *cv) 282put_padlist (CV *cv)
249{ 283{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 284 MAGIC *mg = CORO_MAGIC (cv);
285 AV *av;
251 286
252 if (!mg) 287 if (!mg)
253 { 288 {
254 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 289 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 290 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256 mg->mg_virtual = &vtbl_coro; 291 mg->mg_virtual = &vtbl_coro;
257 mg->mg_obj = (SV *)newAV (); 292 mg->mg_obj = (SV *)newAV ();
258 } 293 }
259 294
260 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 295 av = (AV *)mg->mg_obj;
296
297 if (AvFILLp (av) >= AvMAX (av))
298 av_extend (av, AvMAX (av) + 1);
299
300 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261} 301}
262 302
263#define SB do { 303#define SB do {
264#define SE } while (0) 304#define SE } while (0)
265 305
266#define LOAD(state) load_state(aTHX_ (state));
267#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
268
269#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 306#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
270 307
271static void 308static void
272load_state(pTHX_ Coro__State c) 309load_perl (Coro__State c)
273{ 310{
274 PL_dowarn = c->dowarn; 311#define VAR(name,type) PL_ ## name = c->name;
275 PL_in_eval = c->in_eval; 312# include "state.h"
276 313#undef VAR
277 PL_curstackinfo = c->curstackinfo;
278 PL_curstack = c->curstack;
279 PL_mainstack = c->mainstack;
280 PL_stack_sp = c->stack_sp;
281 PL_op = c->op;
282 PL_curpad = c->curpad;
283 PL_comppad = c->comppad;
284 PL_compcv = c->compcv;
285 PL_stack_base = c->stack_base;
286 PL_stack_max = c->stack_max;
287 PL_tmps_stack = c->tmps_stack;
288 PL_tmps_floor = c->tmps_floor;
289 PL_tmps_ix = c->tmps_ix;
290 PL_tmps_max = c->tmps_max;
291 PL_markstack = c->markstack;
292 PL_markstack_ptr = c->markstack_ptr;
293 PL_markstack_max = c->markstack_max;
294 PL_scopestack = c->scopestack;
295 PL_scopestack_ix = c->scopestack_ix;
296 PL_scopestack_max = c->scopestack_max;
297 PL_savestack = c->savestack;
298 PL_savestack_ix = c->savestack_ix;
299 PL_savestack_max = c->savestack_max;
300#if PERL_VERSION < 9
301 PL_retstack = c->retstack;
302 PL_retstack_ix = c->retstack_ix;
303 PL_retstack_max = c->retstack_max;
304#endif
305 PL_curpm = c->curpm;
306 PL_curcop = c->curcop;
307 PL_top_env = c->top_env;
308 314
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318 if (c->irssv)
319 {
320 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321 SvREFCNT_dec (c->irssv);
322 else
323 {
324 REPLACE_SV (PL_rs, c->irssv);
325 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326 sv_setsv (c->irssv_sv, PL_rs);
327 }
328 }
312 329
313 { 330 {
314 dSP; 331 dSP;
315 CV *cv; 332 CV *cv;
316 333
317 /* now do the ugly restore mess */ 334 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 335 while ((cv = (CV *)POPs))
319 { 336 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 337 put_padlist (cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 338 CvDEPTH (cv) = PTR2IV (POPs);
326 } 339 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 340 }
330 341
331 PUTBACK; 342 PUTBACK;
332 } 343 }
333} 344}
334 345
335static void 346static void
336save_state(pTHX_ Coro__State c, int flags) 347save_perl (Coro__State c)
337{ 348{
338 { 349 {
339 dSP; 350 dSP;
340 I32 cxix = cxstack_ix; 351 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 352 PERL_CONTEXT *ccstk = cxstack;
… …
344 /* 355 /*
345 * the worst thing you can imagine happens first - we have to save 356 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 357 * (and reinitialize) all cv's in the whole callchain :(
347 */ 358 */
348 359
360 EXTEND (SP, 3 + 1);
349 PUSHs (Nullsv); 361 PUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 362 /* this loop was inspired by pp_caller */
351 for (;;) 363 for (;;)
352 { 364 {
353 while (cxix >= 0) 365 while (cxix >= 0)
354 { 366 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 367 PERL_CONTEXT *cx = &ccstk[cxix--];
356 368
357 if (CxTYPE(cx) == CXt_SUB) 369 if (CxTYPE (cx) == CXt_SUB)
358 { 370 {
359 CV *cv = cx->blk_sub.cv; 371 CV *cv = cx->blk_sub.cv;
372
360 if (CvDEPTH(cv)) 373 if (CvDEPTH (cv))
361 { 374 {
362 EXTEND (SP, CvDEPTH(cv)*2); 375 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 376 PUSHs ((SV *)CvPADLIST (cv));
377 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 378 PUSHs ((SV *)cv);
373 379
380 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 381 get_padlist (cv);
375 } 382 }
376 } 383 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 384 }
386 385
387 if (top_si->si_type == PERLSI_MAIN) 386 if (top_si->si_type == PERLSI_MAIN)
388 break; 387 break;
389 388
… …
393 } 392 }
394 393
395 PUTBACK; 394 PUTBACK;
396 } 395 }
397 396
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 397 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 398 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 399 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
400 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401 401
402 c->dowarn = PL_dowarn; 402#define VAR(name,type)c->name = PL_ ## name;
403 c->in_eval = PL_in_eval; 403# include "state.h"
404 404#undef VAR
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp;
409 c->op = PL_op;
410 c->curpad = PL_curpad;
411 c->comppad = PL_comppad;
412 c->compcv = PL_compcv;
413 c->stack_base = PL_stack_base;
414 c->stack_max = PL_stack_max;
415 c->tmps_stack = PL_tmps_stack;
416 c->tmps_floor = PL_tmps_floor;
417 c->tmps_ix = PL_tmps_ix;
418 c->tmps_max = PL_tmps_max;
419 c->markstack = PL_markstack;
420 c->markstack_ptr = PL_markstack_ptr;
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435 c->top_env = PL_top_env;
436} 405}
437 406
438/* 407/*
439 * allocate various perl stacks. This is an exact copy 408 * allocate various perl stacks. This is an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 409 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 410 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 411 * not usually need a lot of stackspace.
443 */ 412 */
413#if PREFER_PERL_FUNCTIONS
414# define coro_init_stacks init_stacks
415#else
444static void 416static void
445coro_init_stacks (pTHX) 417coro_init_stacks ()
446{ 418{
447 LOCK;
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 419 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450 PL_curstackinfo->si_type = PERLSI_MAIN; 420 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 421 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 422 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 423
454 PL_stack_base = AvARRAY(PL_curstack); 424 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 425 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 426 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 427
458 New(50,PL_tmps_stack,96,SV*); 428 New(50,PL_tmps_stack,128,SV*);
459 PL_tmps_floor = -1; 429 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 430 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 431 PL_tmps_max = 128;
462 432
463 New(54,PL_markstack,16,I32); 433 New(54,PL_markstack,32,I32);
464 PL_markstack_ptr = PL_markstack; 434 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 435 PL_markstack_max = PL_markstack + 32;
466 436
467#ifdef SET_MARK_OFFSET 437#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 438 SET_MARK_OFFSET;
469#endif 439#endif
470 440
471 New(54,PL_scopestack,16,I32); 441 New(54,PL_scopestack,32,I32);
472 PL_scopestack_ix = 0; 442 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 443 PL_scopestack_max = 32;
474 444
475 New(54,PL_savestack,96,ANY); 445 New(54,PL_savestack,64,ANY);
476 PL_savestack_ix = 0; 446 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 447 PL_savestack_max = 64;
478 448
479#if PERL_VERSION < 9 449#if !PERL_VERSION_ATLEAST (5,9,0)
480 New(54,PL_retstack,8,OP*); 450 New(54,PL_retstack,16,OP*);
481 PL_retstack_ix = 0; 451 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 452 PL_retstack_max = 16;
483#endif 453#endif
484
485 UNLOCK;
486} 454}
455#endif
487 456
488/* 457/*
489 * destroy the stacks, the callchain etc... 458 * destroy the stacks, the callchain etc...
490 */ 459 */
491static void 460static void
492destroy_stacks(pTHX) 461coro_destroy_stacks ()
493{ 462{
494 if (!IN_DESTRUCT) 463 if (!IN_DESTRUCT)
495 { 464 {
496 /* is this ugly, I ask? */ 465 /* restore all saved variables and stuff */
497 LEAVE_SCOPE (0); 466 LEAVE_SCOPE (0);
467 assert (PL_tmps_floor == -1);
498 468
499 /* sure it is, but more important: is it correct?? :/ */ 469 /* free all temporaries */
500 FREETMPS; 470 FREETMPS;
471 assert (PL_tmps_ix == -1);
501 472
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 473 POPSTACK_TO (PL_mainstack);
503 } 474 }
504 475
505 while (PL_curstackinfo->si_next) 476 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 477 PL_curstackinfo = PL_curstackinfo->si_next;
507 478
508 while (PL_curstackinfo) 479 while (PL_curstackinfo)
509 { 480 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 481 PERL_SI *p = PL_curstackinfo->si_prev;
511 482
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 483 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 484 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 485
524 Safefree (PL_curstackinfo->si_cxstack); 486 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 487 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 488 PL_curstackinfo = p;
527 } 489 }
528 490
529 Safefree (PL_tmps_stack); 491 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 492 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 493 Safefree (PL_scopestack);
532 Safefree (PL_savestack); 494 Safefree (PL_savestack);
533#if PERL_VERSION < 9 495#if !PERL_VERSION_ATLEAST (5,9,0)
534 Safefree (PL_retstack); 496 Safefree (PL_retstack);
535#endif 497#endif
536} 498}
537 499
538static void 500static void
539allocate_stack (Coro__State ctx, int alloc) 501setup_coro (struct coro *coro)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548
549 if (alloc)
550 {
551#if HAVE_MMAP
552 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554 if (stack->sptr != (void *)-1)
555 {
556# if STACKGUARD
557 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558# endif
559 }
560 else
561#endif
562 {
563 stack->ssize = - (STACKSIZE * (long)sizeof (long));
564 New (0, stack->sptr, STACKSIZE, long);
565 }
566 }
567 else
568 stack->sptr = 0;
569
570 ctx->stack = stack;
571}
572
573static void
574deallocate_stack (Coro__State ctx)
575{
576 coro_stack *stack = ctx->stack;
577
578 ctx->stack = 0;
579
580 if (stack)
581 {
582 if (!--stack->refcnt)
583 {
584#ifdef HAVE_MMAP
585 if (stack->ssize > 0 && stack->sptr)
586 munmap (stack->sptr, stack->ssize);
587 else
588#endif
589 Safefree (stack->sptr);
590
591 Safefree (stack);
592 }
593 else if (ctx->gencnt == stack->gencnt)
594 --stack->usecnt;
595 }
596}
597
598static void
599setup_coro (void *arg)
600{ 502{
601 /* 503 /*
602 * emulate part of the perl startup here. 504 * emulate part of the perl startup here.
603 */ 505 */
604 dTHX; 506
507 coro_init_stacks ();
508
509 PL_curcop = &PL_compiling;
510 PL_in_eval = EVAL_NULL;
511 PL_curpm = 0;
512 PL_localizing = 0;
513 PL_dirty = 0;
514 PL_restartop = 0;
515
516 {
517 dSP;
518 LOGOP myop;
519
520 SvREFCNT_dec (GvAV (PL_defgv));
521 GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523 Zero (&myop, 1, LOGOP);
524 myop.op_next = Nullop;
525 myop.op_flags = OPf_WANT_VOID;
526
527 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
529 PUTBACK;
530 PL_op = (OP *)&myop;
531 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532 SPAGAIN;
533 }
534
535 ENTER; /* necessary e.g. for dounwind */
536}
537
538static void
539free_coro_mortal ()
540{
541 if (coro_mortal)
542 {
543 SvREFCNT_dec (coro_mortal);
544 coro_mortal = 0;
545 }
546}
547
548/* inject a fake call to Coro::State::_cctx_init into the execution */
549static void NOINLINE
550prepare_cctx (coro_cctx *cctx)
551{
605 dSP; 552 dSP;
606 Coro__State ctx = (Coro__State)arg; 553 LOGOP myop;
607 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608 554
609 coro_init_stacks (aTHX); 555 Zero (&myop, 1, LOGOP);
610 /*PL_curcop = 0;*/ 556 myop.op_next = PL_op;
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 557 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
612 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614 558
559 PUSHMARK (SP);
560 EXTEND (SP, 2);
561 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
562 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
563 PUTBACK;
564 PL_op = (OP *)&myop;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 566 SPAGAIN;
616
617 if (ctx->stack)
618 {
619 ctx->cursp = 0;
620
621 PUSHMARK(SP);
622 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625 if (SvTRUE (ERRSV))
626 croak (NULL);
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 }
630 else
631 {
632 UNOP myop;
633
634 PL_op = (OP *)&myop;
635
636 Zero(&myop, 1, UNOP);
637 myop.op_next = Nullop;
638 myop.op_flags = OPf_WANT_VOID;
639
640 PUSHMARK(SP);
641 XPUSHs (sub_init);
642 /*
643 * the next line is slightly wrong, as PL_op->op_next
644 * is actually being executed so we skip the first op.
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651 SPAGAIN;
652
653 ENTER; /* necessary e.g. for dounwind */
654 }
655} 567}
656 568
657static void 569static void
658continue_coro (void *arg) 570coro_run (void *arg)
659{ 571{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */
573 UNLOCK;
574
660 /* 575 /*
661 * this is a _very_ stripped down perl interpreter ;) 576 * this is a _very_ stripped down perl interpreter ;)
662 */ 577 */
663 dTHX;
664 Coro__State ctx = (Coro__State)arg;
665
666 PL_top_env = &ctx->start_env; 578 PL_top_env = &PL_start_env;
667 579
668 ctx->cursp = 0; 580 /* inject call to cctx_init */
669 PL_op = PL_op->op_next; 581 prepare_cctx ((coro_cctx *)arg);
670 CALLRUNOPS(aTHX);
671 582
583 /* somebody will hit me for both perl_run and PL_restartop */
584 PL_restartop = PL_op;
585 perl_run (PL_curinterp);
586
587 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
672 abort (); 588 abort ();
673} 589}
674 590
591static coro_cctx *
592cctx_new ()
593{
594 coro_cctx *cctx;
595
596 ++cctx_count;
597
598 Newz (0, cctx, 1, coro_cctx);
599
600#if HAVE_MMAP
601
602 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
603 /* mmap supposedly does allocate-on-write for us */
604 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605
606 if (cctx->sptr == (void *)-1)
607 {
608 perror ("FATAL: unable to mmap stack for coroutine");
609 _exit (EXIT_FAILURE);
610 }
611
612# if STACKGUARD
613 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
614# endif
615
616#else
617
618 cctx->ssize = STACKSIZE * (long)sizeof (long);
619 New (0, cctx->sptr, STACKSIZE, long);
620
621 if (!cctx->sptr)
622 {
623 perror ("FATAL: unable to malloc stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627#endif
628
629#if USE_VALGRIND
630 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632 cctx->ssize + (char *)cctx->sptr
633 );
634#endif
635
636 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637
638 return cctx;
639}
640
675static void 641static void
642cctx_destroy (coro_cctx *cctx)
643{
644 if (!cctx)
645 return;
646
647 --cctx_count;
648
649#if USE_VALGRIND
650 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651#endif
652
653#if HAVE_MMAP
654 munmap (cctx->sptr, cctx->ssize);
655#else
656 Safefree (cctx->sptr);
657#endif
658
659 Safefree (cctx);
660}
661
662static coro_cctx *
663cctx_get ()
664{
665 coro_cctx *cctx;
666
667 if (cctx_first)
668 {
669 cctx = cctx_first;
670 cctx_first = cctx->next;
671 --cctx_idle;
672 }
673 else
674 {
675 cctx = cctx_new ();
676 PL_op = PL_op->op_next;
677 }
678
679 return cctx;
680}
681
682static void
683cctx_put (coro_cctx *cctx)
684{
685 /* free another cctx if overlimit */
686 if (cctx_idle >= MAX_IDLE_CCTX)
687 {
688 coro_cctx *first = cctx_first;
689 cctx_first = first->next;
690 --cctx_idle;
691
692 assert (!first->inuse);
693 cctx_destroy (first);
694 }
695
696 ++cctx_idle;
697 cctx->next = cctx_first;
698 cctx_first = cctx;
699}
700
701/* never call directly, always through the coro_state_transfer global variable */
702static void NOINLINE
676transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 703transfer (struct coro *prev, struct coro *next)
677{ 704{
678 dSTACKLEVEL; 705 dSTACKLEVEL;
679 706
707 /* sometimes transfer is only called to set idle_sp */
708 if (!next)
709 {
710 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
711 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
712 }
680 if (prev != next) 713 else if (prev != next)
681 { 714 {
682 if (next->mainstack) 715 coro_cctx *prev__cctx;
716
717 if (prev->flags & CF_NEW)
683 { 718 {
684 LOCK; 719 /* create a new empty context */
685 SAVE (prev, flags); 720 Newz (0, prev->cctx, 1, coro_cctx);
686 LOAD (next); 721 prev->cctx->inuse = 1;
687 UNLOCK; 722 prev->flags &= ~CF_NEW;
688 723 prev->flags |= CF_RUNNING;
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 {
696 if (!prev->stack)
697 allocate_stack (prev, 0);
698 else if (prev->cursp != stacklevel
699 && prev->stack->usecnt > 1)
700 {
701 prev->gencnt = ++prev->stack->gencnt;
702 prev->stack->usecnt = 1;
703 }
704
705 /* has our stack been invalidated? */
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 {
708 deallocate_stack (next);
709 allocate_stack (next, 1);
710 coro_create (&(next->stack->cctx),
711 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize));
713 }
714
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 } 724 }
722 else if (next->tmps_ix == -2) 725
723 croak ("tried to transfer to running coroutine"); 726 /*TODO: must not croak here */
727 if (!prev->flags & CF_RUNNING)
728 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730 if (next->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733 prev->flags &= ~CF_RUNNING;
734 next->flags |= CF_RUNNING;
735
736 LOCK;
737
738 if (next->flags & CF_NEW)
739 {
740 /* need to start coroutine */
741 next->flags &= ~CF_NEW;
742 /* first get rid of the old state */
743 save_perl (prev);
744 /* setup coroutine call */
745 setup_coro (next);
746 /* need a new stack */
747 assert (!next->cctx);
748 }
724 else 749 else
725 { 750 {
726 LOCK; 751 /* coroutine already started */
727 SAVE (prev, -1); /* first get rid of the old state */ 752 save_perl (prev);
728 UNLOCK; 753 load_perl (next);
729
730 if (flags & TRANSFER_SAVE_CCTXT)
731 {
732 if (!prev->stack)
733 allocate_stack (prev, 0);
734
735 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736 {
737 PL_top_env = &next->start_env;
738
739 setup_coro (next);
740 next->cursp = stacklevel;
741
742 prev->stack->refcnt++;
743 prev->stack->usecnt++;
744 next->stack = prev->stack;
745 next->gencnt = prev->gencnt;
746 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 }
759 else
760 {
761 setup_coro (next);
762 next->cursp = stacklevel;
763 }
764 } 754 }
765 }
766 755
767 LOCK; 756 prev__cctx = prev->cctx;
768 if (coro_mortal) 757
769 { 758 /* possibly "free" the cctx */
770 SvREFCNT_dec (coro_mortal); 759 if (prev__cctx->idle_sp == STACKLEVEL)
760 {
761 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
762 assert (PL_top_env == prev__cctx->top_env);
763
764 prev->cctx = 0;
765
766 cctx_put (prev__cctx);
767 prev__cctx->inuse = 0;
768 }
769
770 if (!next->cctx)
771 {
772 next->cctx = cctx_get ();
773 assert (!next->cctx->inuse);
774 next->cctx->inuse = 1;
775 }
776
777 if (prev__cctx != next->cctx)
778 {
779 prev__cctx->top_env = PL_top_env;
780 PL_top_env = next->cctx->top_env;
781 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782 }
783
771 coro_mortal = 0; 784 free_coro_mortal ();
772 } 785
773 UNLOCK; 786 UNLOCK;
787 }
774} 788}
775 789
776#define SV_CORO(sv,func) \ 790struct transfer_args
777 do { \ 791{
778 if (SvROK (sv)) \ 792 struct coro *prev, *next;
779 sv = SvRV (sv); \ 793};
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796 794
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 795#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
798 796
797static void
798coro_state_destroy (struct coro *coro)
799{
800 if (coro->refcnt--)
801 return;
802
803 if (coro->mainstack && coro->mainstack != main_mainstack)
804 {
805 struct coro temp;
806 Zero (&temp, 1, struct coro);
807 temp.save = CORO_SAVE_ALL;
808
809 if (coro->flags & CF_RUNNING)
810 croak ("FATAL: tried to destroy currently running coroutine");
811
812 save_perl (&temp);
813 load_perl (coro);
814
815 coro_destroy_stacks ();
816
817 load_perl (&temp); /* this will get rid of defsv etc.. */
818
819 coro->mainstack = 0;
820 }
821
822 cctx_destroy (coro->cctx);
823 SvREFCNT_dec (coro->args);
824 Safefree (coro);
825}
826
799static void 827static int
828coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
829{
830 struct coro *coro = (struct coro *)mg->mg_ptr;
831 mg->mg_ptr = 0;
832
833 coro_state_destroy (coro);
834
835 return 0;
836}
837
838static int
839coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
840{
841 struct coro *coro = (struct coro *)mg->mg_ptr;
842
843 ++coro->refcnt;
844
845 return 0;
846}
847
848static MGVTBL coro_state_vtbl = {
849 0, 0, 0, 0,
850 coro_state_clear,
851 0,
852#ifdef MGf_DUP
853 coro_state_dup,
854#else
855# define MGf_DUP 0
856#endif
857};
858
859static struct coro *
860SvSTATE (SV *coro)
861{
862 HV *stash;
863 MAGIC *mg;
864
865 if (SvROK (coro))
866 coro = SvRV (coro);
867
868 stash = SvSTASH (coro);
869 if (stash != coro_stash && stash != coro_state_stash)
870 {
871 /* very slow, but rare, check */
872 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873 croak ("Coro::State object required");
874 }
875
876 mg = SvMAGIC (coro);
877 assert (mg->mg_type == PERL_MAGIC_ext);
878 return (struct coro *)mg->mg_ptr;
879}
880
881static void
882prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
883{
884 ta->prev = SvSTATE (prev_sv);
885 ta->next = SvSTATE (next_sv);
886}
887
888static void
800api_transfer(pTHX_ SV *prev, SV *next, int flags) 889api_transfer (SV *prev_sv, SV *next_sv)
801{ 890{
802 SV_CORO (prev, "Coro::transfer"); 891 struct transfer_args ta;
803 SV_CORO (next, "Coro::transfer");
804 892
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 893 prepare_transfer (&ta, prev_sv, next_sv);
894 TRANSFER (ta);
895}
896
897static int
898api_save (SV *coro_sv, int new_save)
899{
900 struct coro *coro = SvSTATE (coro_sv);
901 int old_save = coro->save;
902
903 if (new_save >= 0)
904 coro->save = new_save;
905
906 return old_save;
806} 907}
807 908
808/** Coro ********************************************************************/ 909/** Coro ********************************************************************/
809 910
810#define PRIO_MAX 3 911#define PRIO_MAX 3
… …
813#define PRIO_LOW -1 914#define PRIO_LOW -1
814#define PRIO_IDLE -3 915#define PRIO_IDLE -3
815#define PRIO_MIN -4 916#define PRIO_MIN -4
816 917
817/* for Coro.pm */ 918/* for Coro.pm */
818static GV *coro_current, *coro_idle; 919static SV *coro_current;
819static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 920static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820static int coro_nready; 921static int coro_nready;
821 922
822static void 923static void
823coro_enq (pTHX_ SV *sv) 924coro_enq (SV *coro_sv)
824{ 925{
825 SV **xprio;
826 int prio;
827
828 if (SvTYPE (sv) != SVt_PVHV)
829 croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834 prio = prio > PRIO_MAX ? PRIO_MAX
835 : prio < PRIO_MIN ? PRIO_MIN
836 : prio;
837
838 av_push (coro_ready [prio - PRIO_MIN], sv); 926 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839 coro_nready++; 927 coro_nready++;
840} 928}
841 929
842static SV * 930static SV *
843coro_deq (pTHX_ int min_prio) 931coro_deq (int min_prio)
844{ 932{
845 int prio = PRIO_MAX - PRIO_MIN; 933 int prio = PRIO_MAX - PRIO_MIN;
846 934
847 min_prio -= PRIO_MIN; 935 min_prio -= PRIO_MIN;
848 if (min_prio < 0) 936 if (min_prio < 0)
849 min_prio = 0; 937 min_prio = 0;
850 938
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 939 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852 if (av_len (coro_ready[prio]) >= 0) 940 if (AvFILLp (coro_ready [prio]) >= 0)
853 { 941 {
854 coro_nready--; 942 coro_nready--;
855 return av_shift (coro_ready[prio]); 943 return av_shift (coro_ready [prio]);
856 } 944 }
857 945
858 return 0; 946 return 0;
859} 947}
860 948
861static void 949static int
862api_ready (SV *coro) 950api_ready (SV *coro_sv)
863{ 951{
864 dTHX; 952 struct coro *coro;
865 953
866 if (SvROK (coro)) 954 if (SvROK (coro_sv))
867 coro = SvRV (coro); 955 coro_sv = SvRV (coro_sv);
956
957 coro = SvSTATE (coro_sv);
958
959 if (coro->flags & CF_READY)
960 return 0;
961
962 coro->flags |= CF_READY;
868 963
869 LOCK; 964 LOCK;
870 coro_enq (aTHX_ SvREFCNT_inc (coro)); 965 coro_enq (SvREFCNT_inc (coro_sv));
871 UNLOCK; 966 UNLOCK;
967
968 return 1;
969}
970
971static int
972api_is_ready (SV *coro_sv)
973{
974 return !!SvSTATE (coro_sv)->flags & CF_READY;
975}
976
977static void
978prepare_schedule (struct transfer_args *ta)
979{
980 SV *prev, *next;
981
982 for (;;)
983 {
984 LOCK;
985 next = coro_deq (PRIO_MIN);
986 UNLOCK;
987
988 if (next)
989 break;
990
991 {
992 dSP;
993
994 ENTER;
995 SAVETMPS;
996
997 PUSHMARK (SP);
998 PUTBACK;
999 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001 FREETMPS;
1002 LEAVE;
1003 }
1004 }
1005
1006 prev = SvRV (coro_current);
1007 SvRV_set (coro_current, next);
1008
1009 /* free this only after the transfer */
1010 LOCK;
1011 free_coro_mortal ();
1012 UNLOCK;
1013 coro_mortal = prev;
1014
1015 assert (!SvROK(prev));//D
1016 assert (!SvROK(next));//D
1017
1018 ta->prev = SvSTATE (prev);
1019 ta->next = SvSTATE (next);
1020
1021 assert (ta->next->flags & CF_READY);
1022 ta->next->flags &= ~CF_READY;
1023}
1024
1025static void
1026prepare_cede (struct transfer_args *ta)
1027{
1028 api_ready (coro_current);
1029
1030 prepare_schedule (ta);
872} 1031}
873 1032
874static void 1033static void
875api_schedule (void) 1034api_schedule (void)
876{ 1035{
877 dTHX; 1036 struct transfer_args ta;
878 1037
879 SV *prev, *next; 1038 prepare_schedule (&ta);
880 1039 TRANSFER (ta);
881 LOCK;
882
883 prev = SvRV (GvSV (coro_current));
884 next = coro_deq (aTHX_ PRIO_MIN);
885
886 if (!next)
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889 /* free this only after the transfer */
890 coro_mortal = prev;
891 SV_CORO (prev, "Coro::schedule");
892
893 SvRV (GvSV (coro_current)) = next;
894
895 SV_CORO (next, "Coro::schedule");
896
897 UNLOCK;
898
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901} 1040}
902 1041
903static void 1042static void
904api_cede (void) 1043api_cede (void)
905{ 1044{
906 dTHX; 1045 struct transfer_args ta;
907 1046
908 LOCK; 1047 prepare_cede (&ta);
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1048 TRANSFER (ta);
910 UNLOCK;
911
912 api_schedule ();
913} 1049}
914 1050
915MODULE = Coro::State PACKAGE = Coro::State 1051MODULE = Coro::State PACKAGE = Coro::State
916 1052
917PROTOTYPES: ENABLE 1053PROTOTYPES: DISABLE
918 1054
919BOOT: 1055BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 1056{
921#ifdef USE_ITHREADS 1057#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 1058 MUTEX_INIT (&coro_mutex);
923#endif 1059#endif
924 BOOT_PAGESIZE; 1060 BOOT_PAGESIZE;
925 1061
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1062 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 1063
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1064 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1065 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1066 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1068 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934 1069
935 main_mainstack = PL_mainstack; 1070 main_mainstack = PL_mainstack;
936 1071
937 coroapi.ver = CORO_API_VERSION; 1072 coroapi.ver = CORO_API_VERSION;
938 coroapi.transfer = api_transfer; 1073 coroapi.transfer = api_transfer;
939}
940 1074
941Coro::State 1075 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942_newprocess(args) 1076}
943 SV * args 1077
944 PROTOTYPE: $ 1078SV *
1079new (char *klass, ...)
945 CODE: 1080 CODE:
946 Coro__State coro; 1081{
1082 struct coro *coro;
1083 HV *hv;
1084 int i;
947 1085
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949 croak ("Coro::State::_newprocess expects an arrayref");
950
951 Newz (0, coro, 1, struct coro); 1086 Newz (0, coro, 1, struct coro);
1087 coro->args = newAV ();
1088 coro->save = CORO_SAVE_ALL;
1089 coro->flags = CF_NEW;
952 1090
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1091 hv = newHV ();
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1092 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955 /*coro->stack = 0;*/ 1093 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956 1094
957 /* same as JMPENV_BOOTSTRAP */ 1095 for (i = 1; i < items; i++)
958 /* we might be able to recycle start_env, but safe is safe */ 1096 av_push (coro->args, newSVsv (ST (i)));
959 /*Zero(&coro->start_env, 1, JMPENV);*/ 1097}
960 coro->start_env.je_ret = -1;
961 coro->start_env.je_mustcatch = TRUE;
962
963 RETVAL = coro;
964 OUTPUT: 1098 OUTPUT:
965 RETVAL 1099 RETVAL
966 1100
1101int
1102save (SV *coro, int new_save = -1)
1103 CODE:
1104 RETVAL = api_save (coro, new_save);
1105 OUTPUT:
1106 RETVAL
1107
967void 1108void
968transfer(prev, next, flags) 1109_set_stacklevel (...)
969 SV *prev 1110 ALIAS:
970 SV *next 1111 Coro::State::transfer = 1
971 int flags 1112 Coro::schedule = 2
972 PROTOTYPE: @ 1113 Coro::cede = 3
973 CODE: 1114 CODE:
974 PUTBACK; 1115{
975 SV_CORO (next, "Coro::transfer"); 1116 struct transfer_args ta;
976 SV_CORO (prev, "Coro::transfer"); 1117
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1118 switch (ix)
978 SPAGAIN; 1119 {
1120 case 0:
1121 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1122 ta.next = 0;
1123 break;
1124
1125 case 1:
1126 if (items != 2)
1127 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1128
1129 prepare_transfer (&ta, ST (0), ST (1));
1130 break;
1131
1132 case 2:
1133 prepare_schedule (&ta);
1134 break;
1135
1136 case 3:
1137 prepare_cede (&ta);
1138 break;
1139 }
1140
1141 TRANSFER (ta);
1142}
979 1143
980void 1144void
981DESTROY(coro) 1145_clone_state_from (SV *dst, SV *src)
982 Coro::State coro 1146 CODE:
983 CODE: 1147{
1148 struct coro *coro_src = SvSTATE (src);
984 1149
985 if (coro->mainstack && coro->mainstack != main_mainstack) 1150 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986 {
987 struct coro temp;
988 1151
989 PUTBACK; 1152 ++coro_src->refcnt;
990 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1153 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
991 LOAD (aTHX_ coro); 1154}
992 SPAGAIN;
993
994 destroy_stacks (aTHX);
995
996 LOAD ((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
998
999 coro->mainstack = 0;
1000 }
1001
1002 deallocate_stack (coro);
1003 SvREFCNT_dec (coro->args);
1004 Safefree (coro);
1005 1155
1006void 1156void
1007_exit(code) 1157_exit (code)
1008 int code 1158 int code
1009 PROTOTYPE: $ 1159 PROTOTYPE: $
1010 CODE: 1160 CODE:
1011 _exit (code); 1161 _exit (code);
1012 1162
1013MODULE = Coro::State PACKAGE = Coro::Cont 1163int
1164cctx_count ()
1165 CODE:
1166 RETVAL = cctx_count;
1167 OUTPUT:
1168 RETVAL
1014 1169
1015# this is slightly dirty (should expose a c-level api) 1170int
1016 1171cctx_idle ()
1017void 1172 CODE:
1018yield(...) 1173 RETVAL = cctx_idle;
1019 PROTOTYPE: @ 1174 OUTPUT:
1020 CODE: 1175 RETVAL
1021 SV *yieldstack;
1022 SV *sv;
1023 AV *defav = GvAV (PL_defgv);
1024 struct coro *prev, *next;
1025
1026 yieldstack = *hv_fetch (
1027 (HV *)SvRV (GvSV (coro_current)),
1028 "yieldstack", sizeof ("yieldstack") - 1,
1029 0
1030 );
1031
1032 /* set up @_ -- ugly */
1033 av_clear (defav);
1034 av_fill (defav, items - 1);
1035 while (items--)
1036 av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038 sv = av_pop ((AV *)SvRV (yieldstack));
1039 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041 SvREFCNT_dec (sv);
1042
1043 transfer (aTHX_ prev, next, 0);
1044 1176
1045MODULE = Coro::State PACKAGE = Coro 1177MODULE = Coro::State PACKAGE = Coro
1046 1178
1047# this is slightly dirty (should expose a c-level api)
1048
1049BOOT: 1179BOOT:
1050{ 1180{
1051 int i; 1181 int i;
1182
1052 HV *stash = gv_stashpv ("Coro", TRUE); 1183 coro_stash = gv_stashpv ("Coro", TRUE);
1053 1184
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1185 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1186 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1187 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1188 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1189 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1190 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060 1191
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1192 coro_current = get_sv ("Coro::current", FALSE);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1193 SvREADONLY_on (coro_current);
1063 1194
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1195 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV (); 1196 coro_ready[i] = newAV ();
1066 1197
1067 { 1198 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 1199 SV *sv = perl_get_sv("Coro::API", 1);
1069 1200
1070 coroapi.schedule = api_schedule; 1201 coroapi.schedule = api_schedule;
1202 coroapi.save = api_save;
1071 coroapi.cede = api_cede; 1203 coroapi.cede = api_cede;
1072 coroapi.ready = api_ready; 1204 coroapi.ready = api_ready;
1205 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 1206 coroapi.nready = &coro_nready;
1074 coroapi.current = coro_current; 1207 coroapi.current = coro_current;
1075 1208
1076 GCoroAPI = &coroapi; 1209 GCoroAPI = &coroapi;
1077 sv_setiv(sv, (IV)&coroapi); 1210 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on(sv); 1211 SvREADONLY_on (sv);
1079 } 1212 }
1080} 1213}
1081 1214
1082#if !PERL_MICRO
1083
1084void 1215void
1085ready(self) 1216_set_current (SV *current)
1086 SV * self
1087 PROTOTYPE: $ 1217 PROTOTYPE: $
1088 CODE: 1218 CODE:
1089 api_ready (self); 1219 SvREFCNT_dec (SvRV (coro_current));
1090 1220 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091#endif
1092 1221
1093int 1222int
1223prio (Coro::State coro, int newprio = 0)
1224 ALIAS:
1225 nice = 1
1226 CODE:
1227{
1228 RETVAL = coro->prio;
1229
1230 if (items > 1)
1231 {
1232 if (ix)
1233 newprio = coro->prio - newprio;
1234
1235 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1236 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1237
1238 coro->prio = newprio;
1239 }
1240}
1241
1242SV *
1243ready (SV *self)
1244 PROTOTYPE: $
1245 CODE:
1246 RETVAL = boolSV (api_ready (self));
1247 OUTPUT:
1248 RETVAL
1249
1250SV *
1251is_ready (SV *self)
1252 PROTOTYPE: $
1253 CODE:
1254 RETVAL = boolSV (api_is_ready (self));
1255 OUTPUT:
1256 RETVAL
1257
1258int
1094nready(...) 1259nready (...)
1095 PROTOTYPE: 1260 PROTOTYPE:
1096 CODE: 1261 CODE:
1097 RETVAL = coro_nready; 1262 RETVAL = coro_nready;
1098 OUTPUT: 1263 OUTPUT:
1099 RETVAL 1264 RETVAL
1100 1265
1101void 1266MODULE = Coro::State PACKAGE = Coro::AIO
1102schedule(...) 1267
1103 PROTOTYPE: 1268SV *
1269_get_state ()
1104 CODE: 1270 CODE:
1105 api_schedule ();
1106
1107void
1108cede(...)
1109 PROTOTYPE:
1110 CODE:
1111 api_cede ();
1112
1113# and these are hacks
1114SV *
1115_aio_get_state ()
1116 CODE:
1117{ 1271{
1118 struct { 1272 struct io_state *data;
1119 int errorno;
1120 int laststype;
1121 int laststatval;
1122 Stat_t statcache;
1123 } data;
1124 1273
1274 RETVAL = newSV (sizeof (struct io_state));
1275 data = (struct io_state *)SvPVX (RETVAL);
1276 SvCUR_set (RETVAL, sizeof (struct io_state));
1277 SvPOK_only (RETVAL);
1278
1125 data.errorno = errno; 1279 data->errorno = errno;
1126 data.laststype = PL_laststype; 1280 data->laststype = PL_laststype;
1127 data.laststatval = PL_laststatval; 1281 data->laststatval = PL_laststatval;
1128 data.statcache = PL_statcache; 1282 data->statcache = PL_statcache;
1129
1130 RETVAL = newSVpvn ((char *)&data, sizeof data);
1131} 1283}
1132 OUTPUT: 1284 OUTPUT:
1133 RETVAL 1285 RETVAL
1134 1286
1135void 1287void
1136_aio_set_state (char *data_) 1288_set_state (char *data_)
1137 PROTOTYPE: $ 1289 PROTOTYPE: $
1138 CODE: 1290 CODE:
1139{ 1291{
1140 struct { 1292 struct io_state *data = (void *)data_;
1141 int errorno;
1142 int laststype;
1143 int laststatval;
1144 Stat_t statcache;
1145 } *data = (void *)data_;
1146 1293
1147 errno = data->errorno; 1294 errno = data->errorno;
1148 PL_laststype = data->laststype; 1295 PL_laststype = data->laststype;
1149 PL_laststatval = data->laststatval; 1296 PL_laststatval = data->laststatval;
1150 PL_statcache = data->statcache; 1297 PL_statcache = data->statcache;
1151} 1298}
1299

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