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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 1.117 by root, Fri Dec 1 19:41:06 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/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 23# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 24# define PL_ppaddr ppaddr
14# endif 25# endif
15# ifndef call_sv 26# ifndef call_sv
16# define call_sv perl_call_sv 27# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 38# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 39# define IS_PADCONST(v) 0
29# endif 40# endif
30#endif 41#endif
31 42
32#include <signal.h> 43#include <stdio.h>
44#include <errno.h>
45
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47# undef STACKGUARD
48#endif
49
50#ifndef STACKGUARD
51# define STACKGUARD 0
52#endif
33 53
34#ifdef HAVE_MMAP 54#ifdef HAVE_MMAP
35# include <unistd.h> 55# include <unistd.h>
36# include <sys/mman.h> 56# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 57# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 59# define MAP_ANONYMOUS MAP_ANON
40# else 60# else
41# undef HAVE_MMAP 61# undef HAVE_MMAP
42# endif 62# endif
43# endif 63# endif
64# include <limits.h>
65# ifndef PAGESIZE
66# define PAGESIZE pagesize
67# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
68static long pagesize;
69# else
70# define BOOT_PAGESIZE (void)0
44#endif 71# endif
45 72#else
46#define SUB_INIT "Coro::State::initialize" 73# define PAGESIZE 0
47#define UCORO_STATE "_coro_state" 74# define BOOT_PAGESIZE (void)0
75#endif
48 76
49/* The next macro should declare a variable stacklevel that contains and approximation 77/* 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 78 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */ 79 * and should be unique. */
80#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 81#define STACKLEVEL ((void *)&stacklevel)
53 82
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 83#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 84
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 85#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x)
87#else
88# define attribute(x)
89#endif
90
91#define NOINLINE attribute ((noinline))
57 92
58#include "CoroAPI.h" 93#include "CoroAPI.h"
94
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59 96
60#ifdef USE_ITHREADS 97#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 98static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 101#else
65# define LOCK 0 102# define LOCK (void)0
66# define UNLOCK 0 103# define UNLOCK (void)0
67#endif 104#endif
68 105
69static struct CoroAPI coroapi; 106static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 107static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 108static 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 */ 109static SV *coro_mortal; /* will be freed after next transfer */
75 110
76/* this is actually not only the c stack but also c registers etc... */ 111static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle;
113
114/* this is a structure representing a c-level coroutine */
77typedef struct { 115typedef struct coro_cctx {
78 int refcnt; /* pointer reference counter */ 116 struct coro_cctx *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 117
82 coro_context cctx; 118 /* the stack */
83
84 void *sptr; 119 void *sptr;
85 long ssize; /* positive == mmap, otherwise malloc */ 120 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87 121
122 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
124 JMPENV *top_env;
125 coro_context cctx;
126
127 int inuse;
128
129#if USE_VALGRIND
130 int valgrind_id;
131#endif
132} coro_cctx;
133
134enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */
138};
139
140/* this is a structure representing a perl-level coroutine */
88struct coro { 141struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 142 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 143 coro_cctx *cctx;
91 144
92 /* the optional C context */ 145 /* data associated with this coroutine (initial args) */
93 coro_stack *stack; 146 AV *args;
94 void *cursp;
95 int gencnt; 147 int refcnt;
148 int flags;
96 149
97 /* optionally saved, might be zero */ 150 /* optionally saved, might be zero */
98 AV *defav; 151 AV *defav;
99 SV *defsv; 152 SV *defsv;
100 SV *errsv; 153 SV *errsv;
101 154
102 /* saved global state not related to stacks */ 155#define VAR(name,type) type name;
103 U8 dowarn; 156# include "state.h"
104 I32 in_eval; 157#undef VAR
105 158
106 /* the stacks and related info (callchain etc..) */ 159 /* coro process data */
107 PERL_SI *curstackinfo; 160 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}; 161};
139 162
140typedef struct coro *Coro__State; 163typedef struct coro *Coro__State;
141typedef struct coro *Coro__State_or_hashref; 164typedef struct coro *Coro__State_or_hashref;
142 165
143/* mostly copied from op.c:cv_clone2 */ 166static AV *
144STATIC AV * 167coro_clone_padlist (CV *cv)
145clone_padlist (pTHX_ AV *protopadlist)
146{ 168{
147 AV *av; 169 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; 170 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);
165 171
166 newpadlist = newAV (); 172 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 173 AvREAL_off (newpadlist);
168 av_store (newpadlist, 0, (SV *) newpad_name); 174#if PERL_VERSION_ATLEAST (5,9,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist);
181
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169 av_store (newpadlist, 1, (SV *) newpad); 183 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
239 184
240 return newpadlist; 185 return newpadlist;
241} 186}
242 187
243STATIC void 188static void
244free_padlist (pTHX_ AV *padlist) 189free_padlist (AV *padlist)
245{ 190{
246 /* may be during global destruction */ 191 /* may be during global destruction */
247 if (SvREFCNT (padlist)) 192 if (SvREFCNT (padlist))
248 { 193 {
249 I32 i = AvFILLp (padlist); 194 I32 i = AvFILLp (padlist);
… …
262 207
263 SvREFCNT_dec ((SV*)padlist); 208 SvREFCNT_dec ((SV*)padlist);
264 } 209 }
265} 210}
266 211
267STATIC int 212static int
268coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 213coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269{ 214{
270 AV *padlist; 215 AV *padlist;
271 AV *av = (AV *)mg->mg_obj; 216 AV *av = (AV *)mg->mg_obj;
272 217
273 /* casting is fun. */ 218 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (aTHX_ padlist); 220 free_padlist (padlist);
276 221
277 SvREFCNT_dec (av); 222 SvREFCNT_dec (av);
223
224 return 0;
278} 225}
279 226
280#define PERL_MAGIC_coro PERL_MAGIC_ext 227#define PERL_MAGIC_coro PERL_MAGIC_ext
281 228
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283 230
231#define CORO_MAGIC(cv) \
232 SvMAGIC (cv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234 ? SvMAGIC (cv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
236 : 0
237
284/* the next two functions merely cache the padlists */ 238/* the next two functions merely cache the padlists */
285STATIC void 239static void
286get_padlist (pTHX_ CV *cv) 240get_padlist (CV *cv)
287{ 241{
288 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 242 MAGIC *mg = CORO_MAGIC (cv);
243 AV *av;
289 244
290 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292 else 247 else
248 {
249#if 0
250 /* this is probably cleaner, but also slower? */
251 CV *cp = Perl_cv_clone (cv);
252 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp);
255#else
293 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 256 CvPADLIST (cv) = coro_clone_padlist (cv);
257#endif
258 }
294} 259}
295 260
296STATIC void 261static void
297put_padlist (pTHX_ CV *cv) 262put_padlist (CV *cv)
298{ 263{
299 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 264 MAGIC *mg = CORO_MAGIC (cv);
265 AV *av;
300 266
301 if (!mg) 267 if (!mg)
302 { 268 {
303 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305 mg->mg_virtual = &vtbl_coro; 271 mg->mg_virtual = &vtbl_coro;
306 mg->mg_obj = (SV *)newAV (); 272 mg->mg_obj = (SV *)newAV ();
307 } 273 }
308 274
309 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 275 av = (AV *)mg->mg_obj;
276
277 if (AvFILLp (av) >= AvMAX (av))
278 av_extend (av, AvMAX (av) + 1);
279
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310} 281}
311 282
312#define SB do { 283#define SB do {
313#define SE } while (0) 284#define SE } while (0)
314 285
315#define LOAD(state) load_state(aTHX_ (state)); 286#define LOAD(state) load_state ((state))
316#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 287#define SAVE(state,flags) save_state ((state),(flags))
317 288
318#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319 290
320static void 291static void
321load_state(pTHX_ Coro__State c) 292load_state (Coro__State c)
322{ 293{
323 PL_dowarn = c->dowarn; 294#define VAR(name,type) PL_ ## name = c->name;
324 PL_in_eval = c->in_eval; 295# include "state.h"
325 296#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;
354 297
355 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358 301
… …
361 CV *cv; 304 CV *cv;
362 305
363 /* now do the ugly restore mess */ 306 /* now do the ugly restore mess */
364 while ((cv = (CV *)POPs)) 307 while ((cv = (CV *)POPs))
365 { 308 {
366 AV *padlist = (AV *)POPs;
367
368 if (padlist)
369 {
370 put_padlist (aTHX_ cv); /* mark this padlist as available */ 309 put_padlist (cv); /* mark this padlist as available */
371 CvPADLIST(cv) = padlist; 310 CvDEPTH (cv) = PTR2IV (POPs);
372 } 311 CvPADLIST (cv) = (AV *)POPs;
373
374 ++CvDEPTH(cv);
375 } 312 }
376 313
377 PUTBACK; 314 PUTBACK;
378 } 315 }
379} 316}
380 317
381static void 318static void
382save_state(pTHX_ Coro__State c, int flags) 319save_state (Coro__State c, int flags)
383{ 320{
384 { 321 {
385 dSP; 322 dSP;
386 I32 cxix = cxstack_ix; 323 I32 cxix = cxstack_ix;
387 PERL_CONTEXT *ccstk = cxstack; 324 PERL_CONTEXT *ccstk = cxstack;
… …
398 { 335 {
399 while (cxix >= 0) 336 while (cxix >= 0)
400 { 337 {
401 PERL_CONTEXT *cx = &ccstk[cxix--]; 338 PERL_CONTEXT *cx = &ccstk[cxix--];
402 339
403 if (CxTYPE(cx) == CXt_SUB) 340 if (CxTYPE (cx) == CXt_SUB)
404 { 341 {
405 CV *cv = cx->blk_sub.cv; 342 CV *cv = cx->blk_sub.cv;
343
406 if (CvDEPTH(cv)) 344 if (CvDEPTH (cv))
407 { 345 {
408 EXTEND (SP, CvDEPTH(cv)*2); 346 EXTEND (SP, 3);
409 347
410 while (--CvDEPTH(cv))
411 {
412 /* this tells the restore code to increment CvDEPTH */
413 PUSHs (Nullsv);
414 PUSHs ((SV *)cv);
415 }
416
417 PUSHs ((SV *)CvPADLIST(cv)); 348 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 350 PUSHs ((SV *)cv);
419 351
420 get_padlist (aTHX_ cv); /* this is a monster */ 352 CvDEPTH (cv) = 0;
353 get_padlist (cv);
421 } 354 }
422 } 355 }
423#ifdef CXt_FORMAT 356#ifdef CXt_FORMAT
424 else if (CxTYPE(cx) == CXt_FORMAT) 357 else if (CxTYPE (cx) == CXt_FORMAT)
425 { 358 {
426 /* I never used formats, so how should I know how these are implemented? */ 359 /* I never used formats, so how should I know how these are implemented? */
427 /* my bold guess is as a simple, plain sub... */ 360 /* my bold guess is as a simple, plain sub... */
428 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429 } 362 }
… …
443 376
444 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
445 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
447 380
448 c->dowarn = PL_dowarn; 381#define VAR(name,type)c->name = PL_ ## name;
449 c->in_eval = PL_in_eval; 382# include "state.h"
450 383#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} 384}
480 385
481/* 386/*
482 * allocate various perl stacks. This is an exact copy 387 * allocate various perl stacks. This is an exact copy
483 * of perl.c:init_stacks, except that it uses less memory 388 * of perl.c:init_stacks, except that it uses less memory
484 * on the (sometimes correct) assumption that coroutines do 389 * on the (sometimes correct) assumption that coroutines do
485 * not usually need a lot of stackspace. 390 * not usually need a lot of stackspace.
486 */ 391 */
487STATIC void 392static void
488coro_init_stacks (pTHX) 393coro_init_stacks ()
489{ 394{
490 LOCK;
491
492 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493 PL_curstackinfo->si_type = PERLSI_MAIN; 396 PL_curstackinfo->si_type = PERLSI_MAIN;
494 PL_curstack = PL_curstackinfo->si_stack; 397 PL_curstack = PL_curstackinfo->si_stack;
495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496 399
497 PL_stack_base = AvARRAY(PL_curstack); 400 PL_stack_base = AvARRAY(PL_curstack);
498 PL_stack_sp = PL_stack_base; 401 PL_stack_sp = PL_stack_base;
499 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500 403
501 New(50,PL_tmps_stack,96,SV*); 404 New(50,PL_tmps_stack,128,SV*);
502 PL_tmps_floor = -1; 405 PL_tmps_floor = -1;
503 PL_tmps_ix = -1; 406 PL_tmps_ix = -1;
504 PL_tmps_max = 96; 407 PL_tmps_max = 128;
505 408
506 New(54,PL_markstack,16,I32); 409 New(54,PL_markstack,32,I32);
507 PL_markstack_ptr = PL_markstack; 410 PL_markstack_ptr = PL_markstack;
508 PL_markstack_max = PL_markstack + 16; 411 PL_markstack_max = PL_markstack + 32;
509 412
510#ifdef SET_MARK_OFFSET 413#ifdef SET_MARK_OFFSET
511 SET_MARK_OFFSET; 414 SET_MARK_OFFSET;
512#endif 415#endif
513 416
514 New(54,PL_scopestack,16,I32); 417 New(54,PL_scopestack,32,I32);
515 PL_scopestack_ix = 0; 418 PL_scopestack_ix = 0;
516 PL_scopestack_max = 16; 419 PL_scopestack_max = 32;
517 420
518 New(54,PL_savestack,96,ANY); 421 New(54,PL_savestack,64,ANY);
519 PL_savestack_ix = 0; 422 PL_savestack_ix = 0;
520 PL_savestack_max = 96; 423 PL_savestack_max = 64;
521 424
425#if !PERL_VERSION_ATLEAST (5,9,0)
522 New(54,PL_retstack,8,OP*); 426 New(54,PL_retstack,16,OP*);
523 PL_retstack_ix = 0; 427 PL_retstack_ix = 0;
524 PL_retstack_max = 8; 428 PL_retstack_max = 16;
525 429#endif
526 UNLOCK;
527} 430}
528 431
529/* 432/*
530 * destroy the stacks, the callchain etc... 433 * destroy the stacks, the callchain etc...
531 */ 434 */
532STATIC void 435static void
533destroy_stacks(pTHX) 436coro_destroy_stacks ()
534{ 437{
535 if (!IN_DESTRUCT) 438 if (!IN_DESTRUCT)
536 { 439 {
537 /* is this ugly, I ask? */ 440 /* is this ugly, I ask? */
538 LEAVE_SCOPE (0); 441 LEAVE_SCOPE (0);
… …
569 472
570 Safefree (PL_tmps_stack); 473 Safefree (PL_tmps_stack);
571 Safefree (PL_markstack); 474 Safefree (PL_markstack);
572 Safefree (PL_scopestack); 475 Safefree (PL_scopestack);
573 Safefree (PL_savestack); 476 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0)
574 Safefree (PL_retstack); 478 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 479#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} 480}
606 481
607static void 482static void
608deallocate_stack (Coro__State ctx) 483setup_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{ 484{
635 /* 485 /*
636 * emulate part of the perl startup here. 486 * emulate part of the perl startup here.
637 */ 487 */
638 dTHX;
639 dSP;
640 Coro__State ctx = (Coro__State)arg;
641 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642 488
643 coro_init_stacks (aTHX); 489 coro_init_stacks ();
644 /*PL_curcop = 0;*/ 490
645 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 491 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL;
493 PL_curpm = 0;
494 PL_localizing = 0;
495 PL_dirty = 0;
496 PL_restartop = 0;
497
498 {
499 dSP;
500 LOGOP myop;
501
502 /* I have no idea why this is needed, but it is */
503 PUSHMARK (SP);
504
646 SvREFCNT_dec (GvAV (PL_defgv)); 505 SvREFCNT_dec (GvAV (PL_defgv));
647 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 506 GvAV (PL_defgv) = coro->args; coro->args = 0;
648 507
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); 508 Zero (&myop, 1, LOGOP);
671 myop.op_next = Nullop; 509 myop.op_next = Nullop;
672 myop.op_flags = OPf_WANT_VOID; 510 myop.op_flags = OPf_WANT_VOID;
673 511
512 PL_op = (OP *)&myop;
513
674 PUSHMARK(SP); 514 PUSHMARK (SP);
675 XPUSHs (sub_init); 515 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; 516 PUTBACK;
684 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685 SPAGAIN; 518 SPAGAIN;
519 }
686 520
687 ENTER; /* necessary e.g. for dounwind */ 521 ENTER; /* necessary e.g. for dounwind */
688 }
689} 522}
690 523
691static void 524static void
692continue_coro (void *arg) 525free_coro_mortal ()
693{ 526{
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) 527 if (coro_mortal)
804 { 528 {
805 SvREFCNT_dec (coro_mortal); 529 SvREFCNT_dec (coro_mortal);
806 coro_mortal = 0; 530 coro_mortal = 0;
807 } 531 }
532}
533
534static void NOINLINE
535prepare_cctx (coro_cctx *cctx)
536{
537 dSP;
538 LOGOP myop;
539
540 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545
546 PUSHMARK (SP);
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN;
551}
552
553static void
554coro_run (void *arg)
555{
556 /* coro_run is the alternative epilogue of transfer() */
808 UNLOCK; 557 UNLOCK;
809}
810 558
811#define SV_CORO(sv,func) \ 559 /*
812 do { \ 560 * this is a _very_ stripped down perl interpreter ;)
813 if (SvROK (sv)) \ 561 */
814 sv = SvRV (sv); \ 562 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)
831 563
832#define SvSTATE(sv) (struct coro *)SvIV (sv) 564 /* inject call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg);
833 566
567 /* somebody will hit me for both perl_run and PL_restartop */
568 perl_run (PL_curinterp);
569
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571 abort ();
572}
573
574static coro_cctx *
575cctx_new ()
576{
577 coro_cctx *cctx;
578
579 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx);
582
583#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588
589 if (cctx->sptr == (void *)-1)
590 {
591 perror ("FATAL: unable to mmap stack for coroutine");
592 _exit (EXIT_FAILURE);
593 }
594
595# if STACKGUARD
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
597# endif
598
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 {
606 perror ("FATAL: unable to malloc stack for coroutine");
607 _exit (EXIT_FAILURE);
608 }
609
610#endif
611
612#if USE_VALGRIND
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620
621 return cctx;
622}
623
624static void
625cctx_destroy (coro_cctx *cctx)
626{
627 if (!cctx)
628 return;
629
630 --cctx_count;
631
632#if USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif
635
636#if HAVE_MMAP
637 munmap (cctx->sptr, cctx->ssize);
638#else
639 Safefree (cctx->sptr);
640#endif
641
642 Safefree (cctx);
643}
644
645static coro_cctx *
646cctx_get ()
647{
648 coro_cctx *cctx;
649
650 if (cctx_first)
651 {
652 cctx = cctx_first;
653 cctx_first = cctx->next;
654 --cctx_idle;
655 }
656 else
657 {
658 cctx = cctx_new ();
659 PL_op = PL_op->op_next;
660 }
661
662 return cctx;
663}
664
665static void
666cctx_put (coro_cctx *cctx)
667{
668 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX)
670 {
671 coro_cctx *first = cctx_first;
672 cctx_first = first->next;
673 --cctx_idle;
674
675 assert (!first->inuse);
676 cctx_destroy (first);
677 }
678
679 ++cctx_idle;
680 cctx->next = cctx_first;
681 cctx_first = cctx;
682}
683
684/* never call directly, always through the coro_state_transfer global variable */
685static void NOINLINE
686transfer (struct coro *prev, struct coro *next, int flags)
687{
688 dSTACKLEVEL;
689
690 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL)
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
693 else if (prev != next)
694 {
695 coro_cctx *prev__cctx;
696
697 if (prev->flags & CF_NEW)
698 {
699 /* create a new empty context */
700 Newz (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING;
704 }
705
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING;
715
716 LOCK;
717
718 if (next->mainstack)
719 {
720 /* coroutine already started */
721 SAVE (prev, flags);
722 LOAD (next);
723 }
724 else
725 {
726 /* need to start coroutine */
727 assert (next->flags & CF_NEW);
728 next->flags &= ~CF_NEW;
729 /* first get rid of the old state */
730 SAVE (prev, -1);
731 /* setup coroutine call */
732 setup_coro (next);
733 /* need a new stack */
734 assert (!next->stack);
735 }
736
737 prev__cctx = prev->cctx;
738
739 /* possibly "free" the cctx */
740 if (prev__cctx->idle_sp == STACKLEVEL && 0)
741 {
742 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743 assert (PL_top_env == prev__cctx->top_env);
744
745 prev->cctx = 0;
746
747 cctx_put (prev__cctx);
748 prev__cctx->inuse = 0;
749 }
750
751 if (!next->cctx)
752 {
753 next->cctx = cctx_get ();
754 assert (!next->cctx->inuse);
755 next->cctx->inuse = 1;
756 }
757
758 if (prev__cctx != next->cctx)
759 {
760 prev__cctx->top_env = PL_top_env;
761 PL_top_env = next->cctx->top_env;
762 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763 }
764
765 free_coro_mortal ();
766
767 UNLOCK;
768 }
769}
770
771struct transfer_args
772{
773 struct coro *prev, *next;
774 int flags;
775};
776
777#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
778
779static void
780coro_state_destroy (struct coro *coro)
781{
782 if (coro->refcnt--)
783 return;
784
785 if (coro->mainstack && coro->mainstack != main_mainstack)
786 {
787 struct coro temp;
788
789 if (coro->flags & CF_RUNNING)
790 croak ("FATAL: tried to destroy currently running coroutine");
791
792 SAVE ((&temp), TRANSFER_SAVE_ALL);
793 LOAD (coro);
794
795 coro_destroy_stacks ();
796
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */
798
799 coro->mainstack = 0;
800 }
801
802 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args);
804 Safefree (coro);
805}
806
834static void 807static int
808coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
809{
810 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0;
812
813 coro_state_destroy (coro);
814
815 return 0;
816}
817
818static int
819coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820{
821 struct coro *coro = (struct coro *)mg->mg_ptr;
822
823 ++coro->refcnt;
824
825 return 0;
826}
827
828static MGVTBL coro_state_vtbl = {
829 0, 0, 0, 0,
830 coro_state_clear,
831 0,
832#ifdef MGf_DUP
833 coro_state_dup,
834#else
835# define MGf_DUP 0
836#endif
837};
838
839static struct coro *
840SvSTATE (SV *coro)
841{
842 HV *stash;
843 MAGIC *mg;
844
845 if (SvROK (coro))
846 coro = SvRV (coro);
847
848 stash = SvSTASH (coro);
849 if (stash != coro_stash && stash != coro_state_stash)
850 {
851 /* very slow, but rare, check */
852 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853 croak ("Coro::State object required");
854 }
855
856 mg = SvMAGIC (coro);
857 assert (mg->mg_type == PERL_MAGIC_ext);
858 return (struct coro *)mg->mg_ptr;
859}
860
861static void
862prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
863{
864 ta->prev = SvSTATE (prev);
865 ta->next = SvSTATE (next);
866 ta->flags = flags;
867}
868
869static void
835api_transfer(pTHX_ SV *prev, SV *next, int flags) 870api_transfer (SV *prev, SV *next, int flags)
836{ 871{
837 SV_CORO (prev, "Coro::transfer"); 872 struct transfer_args ta;
838 SV_CORO (next, "Coro::transfer");
839 873
840 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 874 prepare_transfer (&ta, prev, next, flags);
875 TRANSFER (ta);
841} 876}
842 877
843/** Coro ********************************************************************/ 878/** Coro ********************************************************************/
844 879
845#define PRIO_MAX 3 880#define PRIO_MAX 3
… …
848#define PRIO_LOW -1 883#define PRIO_LOW -1
849#define PRIO_IDLE -3 884#define PRIO_IDLE -3
850#define PRIO_MIN -4 885#define PRIO_MIN -4
851 886
852/* for Coro.pm */ 887/* for Coro.pm */
853static GV *coro_current, *coro_idle; 888static SV *coro_current;
854static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 889static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855static int coro_nready; 890static int coro_nready;
856 891
857static void 892static void
858coro_enq (pTHX_ SV *sv) 893coro_enq (SV *coro_sv)
859{ 894{
860 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); 895 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870 coro_nready++; 896 coro_nready++;
871
872 return;
873 }
874
875 croak ("Coro::ready tried to enqueue something that is not a coroutine");
876} 897}
877 898
878static SV * 899static SV *
879coro_deq (pTHX_ int min_prio) 900coro_deq (int min_prio)
880{ 901{
881 int prio = PRIO_MAX - PRIO_MIN; 902 int prio = PRIO_MAX - PRIO_MIN;
882 903
883 min_prio -= PRIO_MIN; 904 min_prio -= PRIO_MIN;
884 if (min_prio < 0) 905 if (min_prio < 0)
885 min_prio = 0; 906 min_prio = 0;
886 907
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888 if (av_len (coro_ready[prio]) >= 0) 909 if (AvFILLp (coro_ready [prio]) >= 0)
889 { 910 {
890 coro_nready--; 911 coro_nready--;
891 return av_shift (coro_ready[prio]); 912 return av_shift (coro_ready [prio]);
892 } 913 }
893 914
894 return 0; 915 return 0;
895} 916}
896 917
897static void 918static int
898api_ready (SV *coro) 919api_ready (SV *coro_sv)
899{ 920{
900 dTHX; 921 struct coro *coro;
901 922
902 if (SvROK (coro)) 923 if (SvROK (coro_sv))
903 coro = SvRV (coro); 924 coro_sv = SvRV (coro_sv);
925
926 coro = SvSTATE (coro_sv);
927
928 if (coro->flags & CF_READY)
929 return 0;
930
931#if 0 /* this is actually harmless */
932 if (coro->flags & CF_RUNNING)
933 croak ("Coro::ready called on currently running coroutine");
934#endif
935
936 coro->flags |= CF_READY;
904 937
905 LOCK; 938 LOCK;
906 coro_enq (aTHX_ SvREFCNT_inc (coro)); 939 coro_enq (SvREFCNT_inc (coro_sv));
907 UNLOCK; 940 UNLOCK;
941
942 return 1;
943}
944
945static int
946api_is_ready (SV *coro_sv)
947{
948 return !!SvSTATE (coro_sv)->flags & CF_READY;
949}
950
951static void
952prepare_schedule (struct transfer_args *ta)
953{
954 SV *prev, *next;
955
956 for (;;)
957 {
958 LOCK;
959 next = coro_deq (PRIO_MIN);
960 UNLOCK;
961
962 if (next)
963 break;
964
965 {
966 dSP;
967
968 ENTER;
969 SAVETMPS;
970
971 PUSHMARK (SP);
972 PUTBACK;
973 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975 FREETMPS;
976 LEAVE;
977 }
978 }
979
980 prev = SvRV (coro_current);
981 SvRV_set (coro_current, next);
982
983 /* free this only after the transfer */
984 LOCK;
985 free_coro_mortal ();
986 UNLOCK;
987 coro_mortal = prev;
988
989 assert (!SvROK(prev));//D
990 assert (!SvROK(next));//D
991
992 ta->prev = SvSTATE (prev);
993 ta->next = SvSTATE (next);
994 ta->flags = TRANSFER_SAVE_ALL;
995
996 assert (ta->flags & CF_READY);
997 ta->next->flags &= ~CF_READY;
998}
999
1000static void
1001prepare_cede (struct transfer_args *ta)
1002{
1003 api_ready (coro_current);
1004
1005 prepare_schedule (ta);
908} 1006}
909 1007
910static void 1008static void
911api_schedule (void) 1009api_schedule (void)
912{ 1010{
913 dTHX; 1011 struct transfer_args ta;
914 1012
915 SV *prev, *next; 1013 prepare_schedule (&ta);
916 1014 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} 1015}
938 1016
939static void 1017static void
940api_cede (void) 1018api_cede (void)
941{ 1019{
942 dTHX; 1020 struct transfer_args ta;
943 1021
944 LOCK; 1022 prepare_cede (&ta);
945 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1023 TRANSFER (ta);
946 UNLOCK;
947
948 api_schedule ();
949} 1024}
950 1025
951MODULE = Coro::State PACKAGE = Coro::State 1026MODULE = Coro::State PACKAGE = Coro::State
952 1027
953PROTOTYPES: ENABLE 1028PROTOTYPES: DISABLE
954 1029
955BOOT: 1030BOOT:
956{ /* {} necessary for stoopid perl-5.6.x */ 1031{
957#ifdef USE_ITHREADS 1032#ifdef USE_ITHREADS
958 MUTEX_INIT (&coro_mutex); 1033 MUTEX_INIT (&coro_mutex);
959#endif 1034#endif
1035 BOOT_PAGESIZE;
960 1036
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); 1037 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964 1038
965 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1039 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1040 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1041 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969 1042
970 main_mainstack = PL_mainstack; 1043 main_mainstack = PL_mainstack;
971 1044
972 coroapi.ver = CORO_API_VERSION; 1045 coroapi.ver = CORO_API_VERSION;
973 coroapi.transfer = api_transfer; 1046 coroapi.transfer = api_transfer;
974}
975 1047
976Coro::State 1048 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977_newprocess(args) 1049}
978 SV * args 1050
979 PROTOTYPE: $ 1051SV *
1052new (char *klass, ...)
980 CODE: 1053 CODE:
981 Coro__State coro; 1054{
1055 struct coro *coro;
1056 HV *hv;
1057 int i;
982 1058
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); 1059 Newz (0, coro, 1, struct coro);
1060 coro->args = newAV ();
1061 coro->flags = CF_NEW;
987 1062
988 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1063 hv = newHV ();
989 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1064 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
990 /*coro->stack = 0;*/ 1065 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991 1066
992 /* same as JMPENV_BOOTSTRAP */ 1067 for (i = 1; i < items; i++)
993 /* we might be able to recycle start_env, but safe is safe */ 1068 av_push (coro->args, newSVsv (ST (i)));
994 /*Zero(&coro->start_env, 1, JMPENV);*/ 1069}
995 coro->start_env.je_ret = -1;
996 coro->start_env.je_mustcatch = TRUE;
997
998 RETVAL = coro;
999 OUTPUT: 1070 OUTPUT:
1000 RETVAL 1071 RETVAL
1001 1072
1002void 1073void
1003transfer(prev, next, flags) 1074_set_stacklevel (...)
1004 SV *prev 1075 ALIAS:
1005 SV *next 1076 Coro::State::transfer = 1
1006 int flags 1077 Coro::schedule = 2
1007 PROTOTYPE: @ 1078 Coro::cede = 3
1079 Coro::Cont::yield = 4
1008 CODE: 1080 CODE:
1009 PUTBACK; 1081{
1010 SV_CORO (next, "Coro::transfer"); 1082 struct transfer_args ta;
1011 SV_CORO (prev, "Coro::transfer"); 1083
1012 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1084 switch (ix)
1013 SPAGAIN; 1085 {
1086 case 0:
1087 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088 ta.next = 0;
1089 ta.flags = TRANSFER_SET_STACKLEVEL;
1090 break;
1091
1092 case 1:
1093 if (items != 3)
1094 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1095
1096 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1097 break;
1098
1099 case 2:
1100 prepare_schedule (&ta);
1101 break;
1102
1103 case 3:
1104 prepare_cede (&ta);
1105 break;
1106
1107 case 4:
1108 {
1109 SV *yieldstack;
1110 SV *sv;
1111 AV *defav = GvAV (PL_defgv);
1112
1113 yieldstack = *hv_fetch (
1114 (HV *)SvRV (coro_current),
1115 "yieldstack", sizeof ("yieldstack") - 1,
1116 0
1117 );
1118
1119 /* set up @_ -- ugly */
1120 av_clear (defav);
1121 av_fill (defav, items - 1);
1122 while (items--)
1123 av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125 sv = av_pop ((AV *)SvRV (yieldstack));
1126 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128 ta.flags = 0;
1129 SvREFCNT_dec (sv);
1130 }
1131 break;
1132
1133 }
1134
1135 TRANSFER (ta);
1136}
1014 1137
1015void 1138void
1016DESTROY(coro) 1139_clone_state_from (SV *dst, SV *src)
1017 Coro::State coro 1140 CODE:
1018 CODE: 1141{
1142 struct coro *coro_src = SvSTATE (src);
1019 1143
1020 if (coro->mainstack && coro->mainstack != main_mainstack) 1144 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021 {
1022 struct coro temp;
1023 1145
1024 PUTBACK; 1146 ++coro_src->refcnt;
1025 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1147 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1026 LOAD (aTHX_ coro); 1148}
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 1149
1041void 1150void
1042_exit(code) 1151_exit (code)
1043 int code 1152 int code
1044 PROTOTYPE: $ 1153 PROTOTYPE: $
1045 CODE: 1154 CODE:
1046 _exit (code); 1155 _exit (code);
1047 1156
1048MODULE = Coro::State PACKAGE = Coro::Cont 1157int
1158cctx_count ()
1159 CODE:
1160 RETVAL = cctx_count;
1161 OUTPUT:
1162 RETVAL
1049 1163
1050# this is slightly dirty (should expose a c-level api) 1164int
1051 1165cctx_idle ()
1052void 1166 CODE:
1053yield(...) 1167 RETVAL = cctx_idle;
1054 PROTOTYPE: @ 1168 OUTPUT:
1055 CODE: 1169 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 1170
1078MODULE = Coro::State PACKAGE = Coro 1171MODULE = Coro::State PACKAGE = Coro
1079 1172
1080# this is slightly dirty (should expose a c-level api)
1081
1082BOOT: 1173BOOT:
1083{ 1174{
1084 int i; 1175 int i;
1176
1085 HV *stash = gv_stashpv ("Coro", TRUE); 1177 coro_stash = gv_stashpv ("Coro", TRUE);
1086 1178
1087 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093 1185
1094 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1186 coro_current = get_sv ("Coro::current", FALSE);
1095 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1187 SvREADONLY_on (coro_current);
1096 1188
1097 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098 coro_ready[i] = newAV (); 1190 coro_ready[i] = newAV ();
1099 1191
1100 { 1192 {
1101 SV *sv = perl_get_sv("Coro::API", 1); 1193 SV *sv = perl_get_sv("Coro::API", 1);
1102 1194
1103 coroapi.schedule = api_schedule; 1195 coroapi.schedule = api_schedule;
1104 coroapi.cede = api_cede; 1196 coroapi.cede = api_cede;
1105 coroapi.ready = api_ready; 1197 coroapi.ready = api_ready;
1198 coroapi.is_ready = api_is_ready;
1106 coroapi.nready = &coro_nready; 1199 coroapi.nready = &coro_nready;
1107 coroapi.current = coro_current; 1200 coroapi.current = coro_current;
1108 1201
1109 GCoroAPI = &coroapi; 1202 GCoroAPI = &coroapi;
1110 sv_setiv(sv, (IV)&coroapi); 1203 sv_setiv (sv, (IV)&coroapi);
1111 SvREADONLY_on(sv); 1204 SvREADONLY_on (sv);
1112 } 1205 }
1113} 1206}
1114 1207
1115#if !PERL_MICRO 1208int
1209prio (Coro::State coro, int newprio = 0)
1210 ALIAS:
1211 nice = 1
1212 CODE:
1213{
1214 RETVAL = coro->prio;
1116 1215
1117void 1216 if (items > 1)
1217 {
1218 if (ix)
1219 newprio += coro->prio;
1220
1221 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223
1224 coro->prio = newprio;
1225 }
1226}
1227
1228SV *
1118ready(self) 1229ready (SV *self)
1119 SV * self
1120 PROTOTYPE: $ 1230 PROTOTYPE: $
1121 CODE: 1231 CODE:
1122 api_ready (self); 1232 RETVAL = boolSV (api_ready (self));
1233 OUTPUT:
1234 RETVAL
1123 1235
1124#endif 1236SV *
1237is_ready (SV *self)
1238 PROTOTYPE: $
1239 CODE:
1240 RETVAL = boolSV (api_is_ready (self));
1241 OUTPUT:
1242 RETVAL
1125 1243
1126int 1244int
1127nready(...) 1245nready (...)
1128 PROTOTYPE: 1246 PROTOTYPE:
1129 CODE: 1247 CODE:
1130 RETVAL = coro_nready; 1248 RETVAL = coro_nready;
1131 OUTPUT: 1249 OUTPUT:
1132 RETVAL 1250 RETVAL
1133 1251
1134void 1252void
1135schedule(...) 1253_set_current (SV *current)
1136 PROTOTYPE: 1254 PROTOTYPE: $
1137 CODE: 1255 CODE:
1138 api_schedule (); 1256 SvREFCNT_dec (SvRV (coro_current));
1257 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1258
1259MODULE = Coro::State PACKAGE = Coro::AIO
1260
1261SV *
1262_get_state ()
1263 CODE:
1264{
1265 struct {
1266 int errorno;
1267 int laststype;
1268 int laststatval;
1269 Stat_t statcache;
1270 } data;
1271
1272 data.errorno = errno;
1273 data.laststype = PL_laststype;
1274 data.laststatval = PL_laststatval;
1275 data.statcache = PL_statcache;
1276
1277 RETVAL = newSVpvn ((char *)&data, sizeof data);
1278}
1279 OUTPUT:
1280 RETVAL
1139 1281
1140void 1282void
1141cede(...) 1283_set_state (char *data_)
1142 PROTOTYPE: 1284 PROTOTYPE: $
1143 CODE: 1285 CODE:
1144 api_cede (); 1286{
1287 struct {
1288 int errorno;
1289 int laststype;
1290 int laststatval;
1291 Stat_t statcache;
1292 } *data = (void *)data_;
1145 1293
1294 errno = data->errorno;
1295 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache;
1298}

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