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Comparing Coro/Coro/State.xs (file contents):
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC vs.
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC

1#include "libcoro/coro.c"
2
1#include "EXTERN.h" 3#include "EXTERN.h"
2#include "perl.h" 4#include "perl.h"
3#include "XSUB.h" 5#include "XSUB.h"
4 6
5#include "libcoro/coro.c" 7#include "patchlevel.h"
6 8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
7#include <signal.h> 40#include <stdio.h>
41#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
8 50
9#ifdef HAVE_MMAP 51#ifdef HAVE_MMAP
10# include <unistd.h> 52# include <unistd.h>
11# include <sys/mman.h> 53# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 56# define MAP_ANONYMOUS MAP_ANON
15# else 57# else
16# undef HAVE_MMAP 58# undef HAVE_MMAP
17# endif 59# endif
18# endif 60# endif
61# include <limits.h>
62# ifndef PAGESIZE
63# define PAGESIZE pagesize
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE (void)0
19#endif 68# endif
20 69#else
21#define MAY_FLUSH /* increases codesize and is rarely used */ 70# define PAGESIZE 0
22 71# define BOOT_PAGESIZE (void)0
23#define SUB_INIT "Coro::State::initialize" 72#endif
24#define UCORO_STATE "_coro_state"
25 73
26/* The next macro should declare a variable stacklevel that contains and approximation 74/* The next macro should declare a variable stacklevel that contains and approximation
27 * to the current C stack pointer. Its property is that it changes with each call 75 * to the current C stack pointer. Its property is that it changes with each call
28 * and should be unique. */ 76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 78#define STACKLEVEL ((void *)&stacklevel)
30 79
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 81
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif
87
88#define NOINLINE attribute ((noinline))
34 89
35#include "CoroAPI.h" 90#include "CoroAPI.h"
36 91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS
95static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif
102
37static struct CoroAPI coroapi; 103static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */
105static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */
38 107
39/* this is actually not only the c stack but also c registers etc... */ 108/* this is a structure representing a c-level coroutine */
40typedef struct { 109typedef struct coro_cctx {
41 int refcnt; /* pointer reference counter */ 110 struct coro_cctx *next;
42 int usecnt; /* shared by how many coroutines */
43 int gencnt; /* generation counter */
44 111
45 coro_context cctx; 112 /* the stack */
46
47 void *sptr; 113 void *sptr;
48 long ssize; /* positive == mmap, otherwise malloc */ 114 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
50 115
116 /* cpu state */
117 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
118 JMPENV *top_env;
119 coro_context cctx;
120
121#if USE_VALGRIND
122 int valgrind_id;
123#endif
124} coro_cctx;
125
126/* this is a structure representing a perl-level coroutine */
51struct coro { 127struct coro {
52 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 128 /* the c coroutine allocated to this perl coroutine, if any */
53 JMPENV start_env; 129 coro_cctx *cctx;
54 130
55 /* the optional C context */ 131 /* data associated with this coroutine (initial args) */
56 coro_stack *stack; 132 AV *args;
57 void *cursp;
58 int gencnt; 133 int refcnt;
59 134
60 /* optionally saved, might be zero */ 135 /* optionally saved, might be zero */
61 AV *defav; 136 AV *defav;
62 SV *defsv; 137 SV *defsv;
63 SV *errsv; 138 SV *errsv;
… …
72 AV *mainstack; 147 AV *mainstack;
73 SV **stack_sp; 148 SV **stack_sp;
74 OP *op; 149 OP *op;
75 SV **curpad; 150 SV **curpad;
76 AV *comppad; 151 AV *comppad;
152 CV *compcv;
77 SV **stack_base; 153 SV **stack_base;
78 SV **stack_max; 154 SV **stack_max;
79 SV **tmps_stack; 155 SV **tmps_stack;
80 I32 tmps_floor; 156 I32 tmps_floor;
81 I32 tmps_ix; 157 I32 tmps_ix;
… …
90 I32 savestack_ix; 166 I32 savestack_ix;
91 I32 savestack_max; 167 I32 savestack_max;
92 OP **retstack; 168 OP **retstack;
93 I32 retstack_ix; 169 I32 retstack_ix;
94 I32 retstack_max; 170 I32 retstack_max;
171 PMOP *curpm;
95 COP *curcop; 172 COP *curcop;
96 JMPENV *top_env;
97 173
98 /* data associated with this coroutine (initial args) */ 174 /* coro process data */
99 AV *args; 175 int prio;
100}; 176};
101 177
102typedef struct coro *Coro__State; 178typedef struct coro *Coro__State;
103typedef struct coro *Coro__State_or_hashref; 179typedef struct coro *Coro__State_or_hashref;
104 180
105static AV *main_mainstack; /* used to differentiate between $main and others */ 181static AV *
106static HV *coro_state_stash; 182coro_clone_padlist (CV *cv)
107static SV *ucoro_state_sv;
108static U32 ucoro_state_hash;
109static HV *padlist_cache;
110static SV *coro_mortal; /* will be freed after next transfer */
111
112/* mostly copied from op.c:cv_clone2 */
113STATIC AV *
114clone_padlist (AV *protopadlist)
115{ 183{
116 AV *av; 184 AV *padlist = CvPADLIST (cv);
117 I32 ix;
118 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
119 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
120 SV **pname = AvARRAY (protopad_name);
121 SV **ppad = AvARRAY (protopad);
122 I32 fname = AvFILLp (protopad_name);
123 I32 fpad = AvFILLp (protopad);
124 AV *newpadlist, *newpad_name, *newpad; 185 AV *newpadlist, *newpad;
125 SV **npad;
126
127 newpad_name = newAV ();
128 for (ix = fname; ix >= 0; ix--)
129 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
130
131 newpad = newAV ();
132 av_fill (newpad, AvFILLp (protopad));
133 npad = AvARRAY (newpad);
134 186
135 newpadlist = newAV (); 187 newpadlist = newAV ();
136 AvREAL_off (newpadlist); 188 AvREAL_off (newpadlist);
137 av_store (newpadlist, 0, (SV *) newpad_name); 189#if PERL_VERSION_ATLEAST (5,9,0)
190 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
191#else
192 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
193#endif
194 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
195 --AvFILLp (padlist);
196
197 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
138 av_store (newpadlist, 1, (SV *) newpad); 198 av_store (newpadlist, 1, (SV *)newpad);
139 199
140 av = newAV (); /* will be @_ */ 200 return newpadlist;
141 av_extend (av, 0); 201}
142 av_store (newpad, 0, (SV *) av);
143 AvFLAGS (av) = AVf_REIFY;
144 202
145 for (ix = fpad; ix > 0; ix--) 203static void
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT (padlist))
146 { 208 {
147 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 209 I32 i = AvFILLp (padlist);
148 if (namesv && namesv != &PL_sv_undef) 210 while (i >= 0)
149 { 211 {
150 char *name = SvPVX (namesv); /* XXX */ 212 SV **svp = av_fetch (padlist, i--, FALSE);
151 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 213 if (svp)
152 { /* lexical from outside? */
153 npad[ix] = SvREFCNT_inc (ppad[ix]);
154 } 214 {
155 else
156 { /* our own lexical */
157 SV *sv; 215 SV *sv;
158 if (*name == '&') 216 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
159 sv = SvREFCNT_inc (ppad[ix]); 217 SvREFCNT_dec (sv);
160 else if (*name == '@') 218
161 sv = (SV *) newAV (); 219 SvREFCNT_dec (*svp);
162 else if (*name == '%')
163 sv = (SV *) newHV ();
164 else
165 sv = NEWSV (0, 0);
166 if (!SvPADBUSY (sv))
167 SvPADMY_on (sv);
168 npad[ix] = sv;
169 } 220 }
170 } 221 }
171 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 222
172 { 223 SvREFCNT_dec ((SV*)padlist);
173 npad[ix] = SvREFCNT_inc (ppad[ix]);
174 }
175 else
176 {
177 SV *sv = NEWSV (0, 0);
178 SvPADTMP_on (sv);
179 npad[ix] = sv;
180 }
181 } 224 }
225}
182 226
183#if 0 /* return -ENOTUNDERSTOOD */ 227static int
184 /* Now that vars are all in place, clone nested closures. */ 228coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
229{
230 AV *padlist;
231 AV *av = (AV *)mg->mg_obj;
185 232
186 for (ix = fpad; ix > 0; ix--) { 233 /* casting is fun. */
187 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 234 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
188 if (namesv 235 free_padlist (padlist);
189 && namesv != &PL_sv_undef 236
190 && !(SvFLAGS(namesv) & SVf_FAKE) 237 SvREFCNT_dec (av);
191 && *SvPVX(namesv) == '&' 238
192 && CvCLONE(ppad[ix])) 239 return 0;
193 { 240}
194 CV *kid = cv_clone((CV*)ppad[ix]); 241
195 SvREFCNT_dec(ppad[ix]); 242#define PERL_MAGIC_coro PERL_MAGIC_ext
196 CvCLONE_on(kid); 243
197 SvPADMY_on(kid); 244static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
198 npad[ix] = (SV*)kid; 245
199 } 246/* the next two functions merely cache the padlists */
247static void
248get_padlist (CV *cv)
249{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
251
252 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
253 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
254 else
255 {
256#if 0
257 /* this is probably cleaner, but also slower? */
258 CV *cp = Perl_cv_clone (cv);
259 CvPADLIST (cv) = CvPADLIST (cp);
260 CvPADLIST (cp) = 0;
261 SvREFCNT_dec (cp);
262#else
263 CvPADLIST (cv) = coro_clone_padlist (cv);
264#endif
265 }
266}
267
268static void
269put_padlist (CV *cv)
270{
271 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
272
273 if (!mg)
274 {
275 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277 mg->mg_virtual = &vtbl_coro;
278 mg->mg_obj = (SV *)newAV ();
200 } 279 }
201#endif
202 280
203 return newpadlist;
204}
205
206#ifdef MAY_FLUSH
207STATIC void
208free_padlist (AV *padlist)
209{
210 /* may be during global destruction */
211 if (SvREFCNT(padlist))
212 {
213 I32 i = AvFILLp(padlist);
214 while (i >= 0)
215 {
216 SV **svp = av_fetch(padlist, i--, FALSE);
217 SV *sv = svp ? *svp : Nullsv;
218 if (sv)
219 SvREFCNT_dec(sv);
220 }
221
222 SvREFCNT_dec((SV*)padlist);
223 }
224}
225#endif
226
227/* the next two functions merely cache the padlists */
228STATIC void
229get_padlist (CV *cv)
230{
231 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
232
233 if (he && AvFILLp ((AV *)*he) >= 0)
234 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
235 else
236 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
237}
238
239STATIC void
240put_padlist (CV *cv)
241{
242 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
243
244 if (SvTYPE (*he) != SVt_PVAV)
245 {
246 SvREFCNT_dec (*he);
247 *he = (SV *)newAV ();
248 }
249
250 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 281 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
251} 282}
252
253#ifdef MAY_FLUSH
254STATIC void
255flush_padlist_cache ()
256{
257 HV *hv = padlist_cache;
258 padlist_cache = newHV ();
259
260 if (hv_iterinit (hv))
261 {
262 HE *he;
263 AV *padlist;
264
265 while (!!(he = hv_iternext (hv)))
266 {
267 AV *av = (AV *)HeVAL(he);
268
269 /* casting is fun. */
270 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
271 free_padlist (padlist);
272 }
273 }
274
275 SvREFCNT_dec (hv);
276}
277#endif
278 283
279#define SB do { 284#define SB do {
280#define SE } while (0) 285#define SE } while (0)
281 286
282#define LOAD(state) load_state(aTHX_ (state)); 287#define LOAD(state) load_state((state));
283#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 288#define SAVE(state,flags) save_state((state),(flags));
284 289
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 290#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286 291
287static void 292static void
288load_state(pTHX_ Coro__State c) 293load_state(Coro__State c)
289{ 294{
290 PL_dowarn = c->dowarn; 295 PL_dowarn = c->dowarn;
291 PL_in_eval = c->in_eval; 296 PL_in_eval = c->in_eval;
292 297
293 PL_curstackinfo = c->curstackinfo; 298 PL_curstackinfo = c->curstackinfo;
… …
295 PL_mainstack = c->mainstack; 300 PL_mainstack = c->mainstack;
296 PL_stack_sp = c->stack_sp; 301 PL_stack_sp = c->stack_sp;
297 PL_op = c->op; 302 PL_op = c->op;
298 PL_curpad = c->curpad; 303 PL_curpad = c->curpad;
299 PL_comppad = c->comppad; 304 PL_comppad = c->comppad;
305 PL_compcv = c->compcv;
300 PL_stack_base = c->stack_base; 306 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max; 307 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack; 308 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor; 309 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix; 310 PL_tmps_ix = c->tmps_ix;
… …
310 PL_scopestack_ix = c->scopestack_ix; 316 PL_scopestack_ix = c->scopestack_ix;
311 PL_scopestack_max = c->scopestack_max; 317 PL_scopestack_max = c->scopestack_max;
312 PL_savestack = c->savestack; 318 PL_savestack = c->savestack;
313 PL_savestack_ix = c->savestack_ix; 319 PL_savestack_ix = c->savestack_ix;
314 PL_savestack_max = c->savestack_max; 320 PL_savestack_max = c->savestack_max;
321#if !PERL_VERSION_ATLEAST (5,9,0)
315 PL_retstack = c->retstack; 322 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix; 323 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max; 324 PL_retstack_max = c->retstack_max;
325#endif
326 PL_curpm = c->curpm;
318 PL_curcop = c->curcop; 327 PL_curcop = c->curcop;
319 PL_top_env = c->top_env;
320 328
321 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 329 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
322 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 330 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
323 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 331 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
324 332
… …
333 341
334 if (padlist) 342 if (padlist)
335 { 343 {
336 put_padlist (cv); /* mark this padlist as available */ 344 put_padlist (cv); /* mark this padlist as available */
337 CvPADLIST(cv) = padlist; 345 CvPADLIST(cv) = padlist;
338#ifdef USE_THREADS
339 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
340#endif
341 } 346 }
342 347
343 ++CvDEPTH(cv); 348 ++CvDEPTH(cv);
344 } 349 }
345 350
346 PUTBACK; 351 PUTBACK;
347 } 352 }
348} 353}
349 354
350static void 355static void
351save_state(pTHX_ Coro__State c, int flags) 356save_state(Coro__State c, int flags)
352{ 357{
353 { 358 {
354 dSP; 359 dSP;
355 I32 cxix = cxstack_ix; 360 I32 cxix = cxstack_ix;
356 PERL_CONTEXT *ccstk = cxstack; 361 PERL_CONTEXT *ccstk = cxstack;
… …
372 if (CxTYPE(cx) == CXt_SUB) 377 if (CxTYPE(cx) == CXt_SUB)
373 { 378 {
374 CV *cv = cx->blk_sub.cv; 379 CV *cv = cx->blk_sub.cv;
375 if (CvDEPTH(cv)) 380 if (CvDEPTH(cv))
376 { 381 {
377#ifdef USE_THREADS
378 /*XPUSHs ((SV *)CvOWNER(cv));*/
379 /*CvOWNER(cv) = 0;*/
380 /*error must unlock this cv etc.. etc...*/
381#endif
382 EXTEND (SP, CvDEPTH(cv)*2); 382 EXTEND (SP, CvDEPTH(cv)*2);
383 383
384 while (--CvDEPTH(cv)) 384 while (--CvDEPTH(cv))
385 { 385 {
386 /* this tells the restore code to increment CvDEPTH */ 386 /* this tells the restore code to increment CvDEPTH */
… …
389 } 389 }
390 390
391 PUSHs ((SV *)CvPADLIST(cv)); 391 PUSHs ((SV *)CvPADLIST(cv));
392 PUSHs ((SV *)cv); 392 PUSHs ((SV *)cv);
393 393
394 get_padlist (cv); /* this is a monster */ 394 get_padlist (cv);
395 } 395 }
396 } 396 }
397#ifdef CXt_FORMAT
397 else if (CxTYPE(cx) == CXt_FORMAT) 398 else if (CxTYPE(cx) == CXt_FORMAT)
398 { 399 {
399 /* I never used formats, so how should I know how these are implemented? */ 400 /* I never used formats, so how should I know how these are implemented? */
400 /* my bold guess is as a simple, plain sub... */ 401 /* my bold guess is as a simple, plain sub... */
401 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 402 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
402 } 403 }
404#endif
403 } 405 }
404 406
405 if (top_si->si_type == PERLSI_MAIN) 407 if (top_si->si_type == PERLSI_MAIN)
406 break; 408 break;
407 409
… …
425 c->mainstack = PL_mainstack; 427 c->mainstack = PL_mainstack;
426 c->stack_sp = PL_stack_sp; 428 c->stack_sp = PL_stack_sp;
427 c->op = PL_op; 429 c->op = PL_op;
428 c->curpad = PL_curpad; 430 c->curpad = PL_curpad;
429 c->comppad = PL_comppad; 431 c->comppad = PL_comppad;
432 c->compcv = PL_compcv;
430 c->stack_base = PL_stack_base; 433 c->stack_base = PL_stack_base;
431 c->stack_max = PL_stack_max; 434 c->stack_max = PL_stack_max;
432 c->tmps_stack = PL_tmps_stack; 435 c->tmps_stack = PL_tmps_stack;
433 c->tmps_floor = PL_tmps_floor; 436 c->tmps_floor = PL_tmps_floor;
434 c->tmps_ix = PL_tmps_ix; 437 c->tmps_ix = PL_tmps_ix;
… …
440 c->scopestack_ix = PL_scopestack_ix; 443 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max; 444 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack; 445 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix; 446 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max; 447 c->savestack_max = PL_savestack_max;
448#if !PERL_VERSION_ATLEAST (5,9,0)
445 c->retstack = PL_retstack; 449 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix; 450 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max; 451 c->retstack_max = PL_retstack_max;
452#endif
453 c->curpm = PL_curpm;
448 c->curcop = PL_curcop; 454 c->curcop = PL_curcop;
449 c->top_env = PL_top_env;
450} 455}
451 456
452/* 457/*
453 * allocate various perl stacks. This is an exact copy 458 * allocate various perl stacks. This is an exact copy
454 * of perl.c:init_stacks, except that it uses less memory 459 * of perl.c:init_stacks, except that it uses less memory
455 * on the assumption that coroutines do not usually need 460 * on the (sometimes correct) assumption that coroutines do
456 * a lot of stackspace. 461 * not usually need a lot of stackspace.
457 */ 462 */
458STATIC void 463static void
459coro_init_stacks (pTHX) 464coro_init_stacks ()
460{ 465{
461 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 466 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
462 PL_curstackinfo->si_type = PERLSI_MAIN; 467 PL_curstackinfo->si_type = PERLSI_MAIN;
463 PL_curstack = PL_curstackinfo->si_stack; 468 PL_curstack = PL_curstackinfo->si_stack;
464 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 469 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
474 479
475 New(54,PL_markstack,16,I32); 480 New(54,PL_markstack,16,I32);
476 PL_markstack_ptr = PL_markstack; 481 PL_markstack_ptr = PL_markstack;
477 PL_markstack_max = PL_markstack + 16; 482 PL_markstack_max = PL_markstack + 16;
478 483
484#ifdef SET_MARK_OFFSET
479 SET_MARK_OFFSET; 485 SET_MARK_OFFSET;
486#endif
480 487
481 New(54,PL_scopestack,16,I32); 488 New(54,PL_scopestack,16,I32);
482 PL_scopestack_ix = 0; 489 PL_scopestack_ix = 0;
483 PL_scopestack_max = 16; 490 PL_scopestack_max = 16;
484 491
485 New(54,PL_savestack,96,ANY); 492 New(54,PL_savestack,96,ANY);
486 PL_savestack_ix = 0; 493 PL_savestack_ix = 0;
487 PL_savestack_max = 96; 494 PL_savestack_max = 96;
488 495
496#if !PERL_VERSION_ATLEAST (5,9,0)
489 New(54,PL_retstack,8,OP*); 497 New(54,PL_retstack,8,OP*);
490 PL_retstack_ix = 0; 498 PL_retstack_ix = 0;
491 PL_retstack_max = 8; 499 PL_retstack_max = 8;
500#endif
492} 501}
493 502
494/* 503/*
495 * destroy the stacks, the callchain etc... 504 * destroy the stacks, the callchain etc...
496 * still there is a memleak of 128 bytes...
497 */ 505 */
498STATIC void 506static void
499destroy_stacks(pTHX) 507coro_destroy_stacks ()
500{ 508{
501 if (!IN_DESTRUCT) 509 if (!IN_DESTRUCT)
502 { 510 {
503 /* is this ugly, I ask? */ 511 /* is this ugly, I ask? */
504 while (PL_scopestack_ix) 512 LEAVE_SCOPE (0);
505 LEAVE;
506 513
507 /* sure it is, but more important: is it correct?? :/ */ 514 /* sure it is, but more important: is it correct?? :/ */
508 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
509 FREETMPS; 515 FREETMPS;
516
517 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
510 } 518 }
511 519
512 while (PL_curstackinfo->si_next) 520 while (PL_curstackinfo->si_next)
513 PL_curstackinfo = PL_curstackinfo->si_next; 521 PL_curstackinfo = PL_curstackinfo->si_next;
514 522
515 while (PL_curstackinfo) 523 while (PL_curstackinfo)
516 { 524 {
517 PERL_SI *p = PL_curstackinfo->si_prev; 525 PERL_SI *p = PL_curstackinfo->si_prev;
518 526
519 { 527 { /*D*//*remove*/
520 dSP; 528 dSP;
521 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 529 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
522 PUTBACK; /* possibly superfluous */ 530 PUTBACK; /* possibly superfluous */
523 } 531 }
524 532
525 if (!IN_DESTRUCT) 533 if (!IN_DESTRUCT)
526 { 534 {
527 dounwind(-1); 535 dounwind (-1);/*D*//*remove*/
528 SvREFCNT_dec(PL_curstackinfo->si_stack); 536 SvREFCNT_dec (PL_curstackinfo->si_stack);
529 } 537 }
530 538
531 Safefree(PL_curstackinfo->si_cxstack); 539 Safefree (PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo); 540 Safefree (PL_curstackinfo);
533 PL_curstackinfo = p; 541 PL_curstackinfo = p;
534 } 542 }
535 543
536 Safefree(PL_tmps_stack); 544 Safefree (PL_tmps_stack);
537 Safefree(PL_markstack); 545 Safefree (PL_markstack);
538 Safefree(PL_scopestack); 546 Safefree (PL_scopestack);
539 Safefree(PL_savestack); 547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
540 Safefree(PL_retstack); 549 Safefree (PL_retstack);
541}
542
543static void
544allocate_stack (Coro__State ctx, int alloc)
545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
555#if HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif 550#endif
560 {
561 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long);
563 New (0, stack->sptr, 4096, long);
564 }
565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
570} 551}
571 552
572static void 553static void
573deallocate_stack (Coro__State ctx) 554setup_coro (struct coro *coro)
574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
583#ifdef HAVE_MMAP
584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
587#else
588 Safefree (stack->sptr);
589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
595}
596
597static void
598setup_coro (void *arg)
599{ 555{
600 /* 556 /*
601 * emulate part of the perl startup here. 557 * emulate part of the perl startup here.
602 */ 558 */
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606 559
607 coro_init_stacks (aTHX); 560 coro_init_stacks ();
561
608 /*PL_curcop = 0;*/ 562 PL_curcop = 0;
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 563 PL_in_eval = 0;
564 PL_curpm = 0;
565
566 {
567 dSP;
568 LOGOP myop;
569
570 /* I have no idea why this is needed, but it is */
571 PUSHMARK (SP);
572
610 SvREFCNT_dec (GvAV (PL_defgv)); 573 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args; 574 GvAV (PL_defgv) = coro->args; coro->args = 0;
612 575
613 SPAGAIN;
614
615 if (ctx->stack)
616 {
617 ctx->cursp = 0;
618
619 PUSHMARK(SP);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
626 croak ("FATAL: CCTXT coroutine returned!");
627 }
628 else
629 {
630 UNOP myop;
631
632 PL_op = (OP *)&myop;
633
634 Zero(&myop, 1, UNOP); 576 Zero (&myop, 1, LOGOP);
635 myop.op_next = Nullop; 577 myop.op_next = Nullop;
636 myop.op_flags = OPf_WANT_VOID; 578 myop.op_flags = OPf_WANT_VOID;
637 579
580 PL_op = (OP *)&myop;
581
638 PUSHMARK(SP); 582 PUSHMARK (SP);
639 XPUSHs (sub_init); 583 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
640 /*
641 * the next line is slightly wrong, as PL_op->op_next
642 * is actually being executed so we skip the first op.
643 * that doesn't matter, though, since it is only
644 * pp_nextstate and we never return...
645 * ah yes, and I don't care anyways ;)
646 */
647 PUTBACK; 584 PUTBACK;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 585 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN; 586 SPAGAIN;
650 587
651 ENTER; /* necessary e.g. for dounwind */ 588 ENTER; /* necessary e.g. for dounwind */
652 } 589 }
653} 590}
654 591
655static void 592static void
656continue_coro (void *arg) 593free_coro_mortal ()
657{ 594{
658 /*
659 * this is a _very_ stripped down perl interpreter ;)
660 */
661 Coro__State ctx = (Coro__State)arg;
662 JMPENV coro_start_env;
663
664 PL_top_env = &ctx->start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677 static struct coro *xnext;
678
679 if (prev != next)
680 {
681 xnext = next;
682
683 if (next->mainstack)
684 {
685 SAVE (prev, flags);
686 LOAD (next);
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 {
695 if (!prev->stack)
696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
716 }
717
718 }
719 else if (next->tmps_ix == -2)
720 croak ("tried to transfer to running coroutine");
721 else
722 {
723 SAVE (prev, -1); /* first get rid of the old state */
724
725 if (flags & TRANSFER_SAVE_CCTXT)
726 {
727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731 {
732 PL_top_env = &next->start_env;
733
734 setup_coro (next);
735
736 prev->stack->refcnt++;
737 prev->stack->usecnt++;
738 next->stack = prev->stack;
739 next->gencnt = prev->gencnt;
740 }
741 else
742 {
743 allocate_stack (next, 1);
744 coro_create (&(next->stack->cctx),
745 setup_coro, (void *)next,
746 next->stack->sptr, labs (next->stack->ssize));
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 /* don't add any code here */
749 }
750 }
751 else
752 setup_coro (next);
753 }
754
755 /*
756 * xnext is now either prev or next, depending on wether
757 * we switched the c stack or not. that's why I use a global
758 * variable, that should become thread-specific at one point.
759 */
760 xnext->cursp = stacklevel;
761 }
762
763 if (coro_mortal) 595 if (coro_mortal)
764 { 596 {
765 SvREFCNT_dec (coro_mortal); 597 SvREFCNT_dec (coro_mortal);
766 coro_mortal = 0; 598 coro_mortal = 0;
767 } 599 }
768} 600}
769 601
770#define SV_CORO(sv,func) \ 602static void NOINLINE
771 do { \ 603prepare_cctx (coro_cctx *cctx)
772 if (SvROK (sv)) \ 604{
773 sv = SvRV (sv); \ 605 dSP;
774 \ 606 LOGOP myop;
775 if (SvTYPE(sv) == SVt_PVHV) \
776 { \
777 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778 \
779 if (!he) \
780 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781 \
782 (sv) = SvRV (HeVAL(he)); \
783 } \
784 \
785 /* must also be changed inside Coro::Cont::yield */ \
786 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788 \
789 } while(0)
790 607
791#define SvSTATE(sv) (struct coro *)SvIV (sv) 608 Zero (&myop, 1, LOGOP);
609 myop.op_next = PL_op;
610 myop.op_flags = OPf_WANT_VOID;
792 611
612 sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613
614 PUSHMARK (SP);
615 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
616 PUTBACK;
617 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
618 SPAGAIN;
619}
620
621static void
622coro_run (void *arg)
623{
624 /* coro_run is the alternative epilogue of transfer() */
625 UNLOCK;
626
627 /*
628 * this is a _very_ stripped down perl interpreter ;)
629 */
630 PL_top_env = &PL_start_env;
631 /* inject call to cctx_init */
632 prepare_cctx ((coro_cctx *)arg);
633
634 /* somebody will hit me for both perl_run and PL_restartop */
635 perl_run (PL_curinterp);
636
637 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638 abort ();
639}
640
641static coro_cctx *
642cctx_new ()
643{
644 coro_cctx *cctx;
645
646 New (0, cctx, 1, coro_cctx);
647
648#if HAVE_MMAP
649
650 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
651 /* mmap suppsedly does allocate-on-write for us */
652 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
653
654 if (cctx->sptr == (void *)-1)
655 {
656 perror ("FATAL: unable to mmap stack for coroutine");
657 _exit (EXIT_FAILURE);
658 }
659
660# if STACKGUARD
661 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
662# endif
663
664#else
665
666 cctx->ssize = STACKSIZE * (long)sizeof (long);
667 New (0, cctx->sptr, STACKSIZE, long);
668
669 if (!cctx->sptr)
670 {
671 perror ("FATAL: unable to malloc stack for coroutine");
672 _exit (EXIT_FAILURE);
673 }
674
675#endif
676
677#if USE_VALGRIND
678 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
679 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680 cctx->ssize + (char *)cctx->sptr
681 );
682#endif
683
684 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
685
686 return cctx;
687}
688
689static void
690cctx_free (coro_cctx *cctx)
691{
692 if (!cctx)
693 return;
694
695#if USE_VALGRIND
696 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697#endif
698
699#if HAVE_MMAP
700 munmap (cctx->sptr, cctx->ssize);
701#else
702 Safefree (cctx->sptr);
703#endif
704
705 Safefree (cctx);
706}
707
708static coro_cctx *cctx_first;
709static int cctx_count, cctx_idle;
710
711static coro_cctx *
712cctx_get ()
713{
714 coro_cctx *cctx;
715
716 if (cctx_first)
717 {
718 --cctx_idle;
719 cctx = cctx_first;
720 cctx_first = cctx->next;
721 }
722 else
723 {
724 ++cctx_count;
725 cctx = cctx_new ();
726 PL_op = PL_op->op_next;
727 }
728
729 return cctx;
730}
731
732static void
733cctx_put (coro_cctx *cctx)
734{
735 ++cctx_idle;
736 cctx->next = cctx_first;
737 cctx_first = cctx;
738}
739
740/* never call directly, always through the coro_state_transfer global variable */
741static void NOINLINE
742transfer (struct coro *prev, struct coro *next, int flags)
743{
744 dSTACKLEVEL;
745
746 /* sometimes transfer is only called to set idle_sp */
747 if (flags == TRANSFER_SET_STACKLEVEL)
748 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
749 else if (prev != next)
750 {
751 coro_cctx *prev__cctx;
752
753 LOCK;
754
755 if (next->mainstack)
756 {
757 /* coroutine already started */
758 SAVE (prev, flags);
759 LOAD (next);
760 }
761 else
762 {
763 /* need to start coroutine */
764 /* first get rid of the old state */
765 SAVE (prev, -1);
766 /* setup coroutine call */
767 setup_coro (next);
768 /* need a stack */
769 next->cctx = 0;
770 }
771
772 if (!prev->cctx)
773 /* create a new empty context */
774 Newz (0, prev->cctx, 1, coro_cctx);
775
776 prev__cctx = prev->cctx;
777
778 /* possibly "free" the cctx */
779 if (prev__cctx->idle_sp == STACKLEVEL)
780 {
781 cctx_put (prev__cctx);
782 prev->cctx = 0;
783 }
784
785 if (!next->cctx)
786 next->cctx = cctx_get ();
787
788 if (prev__cctx != next->cctx)
789 {
790 prev__cctx->top_env = PL_top_env;
791 PL_top_env = next->cctx->top_env;
792 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793 }
794
795 free_coro_mortal ();
796
797 UNLOCK;
798 }
799}
800
801struct transfer_args
802{
803 struct coro *prev, *next;
804 int flags;
805};
806
807#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
808
809static void
810coro_state_destroy (struct coro *coro)
811{
812 if (coro->refcnt--)
813 return;
814
815 if (coro->mainstack && coro->mainstack != main_mainstack)
816 {
817 struct coro temp;
818
819 SAVE ((&temp), TRANSFER_SAVE_ALL);
820 LOAD (coro);
821
822 coro_destroy_stacks ();
823
824 LOAD ((&temp)); /* this will get rid of defsv etc.. */
825
826 coro->mainstack = 0;
827 }
828
829 cctx_free (coro->cctx);
830 SvREFCNT_dec (coro->args);
831 Safefree (coro);
832}
833
793static void 834static int
835coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
836{
837 struct coro *coro = (struct coro *)mg->mg_ptr;
838 mg->mg_ptr = 0;
839
840 coro_state_destroy (coro);
841
842 return 0;
843}
844
845static int
846coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
847{
848 struct coro *coro = (struct coro *)mg->mg_ptr;
849
850 ++coro->refcnt;
851
852 return 0;
853}
854
855static MGVTBL coro_state_vtbl = {
856 0, 0, 0, 0,
857 coro_state_clear,
858 0,
859#ifdef MGf_DUP
860 coro_state_dup,
861#else
862# define MGf_DUP 0
863#endif
864};
865
866static struct coro *
867SvSTATE (SV *coro)
868{
869 HV *stash;
870 MAGIC *mg;
871
872 if (SvROK (coro))
873 coro = SvRV (coro);
874
875 stash = SvSTASH (coro);
876 if (stash != coro_stash && stash != coro_state_stash)
877 {
878 /* very slow, but rare, check */
879 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880 croak ("Coro::State object required");
881 }
882
883 mg = SvMAGIC (coro);
884 assert (mg->mg_type == PERL_MAGIC_ext);
885 return (struct coro *)mg->mg_ptr;
886}
887
888static void
889prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
890{
891 ta->prev = SvSTATE (prev);
892 ta->next = SvSTATE (next);
893 ta->flags = flags;
894}
895
896static void
794api_transfer(pTHX_ SV *prev, SV *next, int flags) 897api_transfer (SV *prev, SV *next, int flags)
795{ 898{
796 SV_CORO (prev, "Coro::transfer"); 899 dTHX;
797 SV_CORO (next, "Coro::transfer"); 900 struct transfer_args ta;
798 901
799 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 902 prepare_transfer (&ta, prev, next, flags);
903 TRANSFER (ta);
800} 904}
801 905
802/** Coro ********************************************************************/ 906/** Coro ********************************************************************/
803 907
804#define PRIO_MAX 3 908#define PRIO_MAX 3
… …
808#define PRIO_IDLE -3 912#define PRIO_IDLE -3
809#define PRIO_MIN -4 913#define PRIO_MIN -4
810 914
811/* for Coro.pm */ 915/* for Coro.pm */
812static GV *coro_current, *coro_idle; 916static GV *coro_current, *coro_idle;
813static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 917static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
814static int coro_nready; 918static int coro_nready;
815 919
816static void 920static void
817coro_enq (SV *sv) 921coro_enq (SV *sv)
818{ 922{
923 int prio;
924
819 if (SvTYPE (sv) == SVt_PVHV) 925 if (SvTYPE (sv) != SVt_PVHV)
820 {
821 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824 prio = prio > PRIO_MAX ? PRIO_MAX
825 : prio < PRIO_MIN ? PRIO_MIN
826 : prio;
827
828 av_push (coro_ready [prio - PRIO_MIN], sv);
829 coro_nready++;
830
831 return;
832 }
833
834 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 926 croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928 prio = SvSTATE (sv)->prio;
929
930 av_push (coro_ready [prio - PRIO_MIN], sv);
931 coro_nready++;
835} 932}
836 933
837static SV * 934static SV *
838coro_deq (int min_prio) 935coro_deq (int min_prio)
839{ 936{
… …
842 min_prio -= PRIO_MIN; 939 min_prio -= PRIO_MIN;
843 if (min_prio < 0) 940 if (min_prio < 0)
844 min_prio = 0; 941 min_prio = 0;
845 942
846 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 943 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
847 if (av_len (coro_ready[prio]) >= 0) 944 if (AvFILLp (coro_ready [prio]) >= 0)
848 { 945 {
849 coro_nready--; 946 coro_nready--;
850 return av_shift (coro_ready[prio]); 947 return av_shift (coro_ready [prio]);
851 } 948 }
852 949
853 return 0; 950 return 0;
854} 951}
855 952
856static void 953static void
857api_ready (SV *coro) 954api_ready (SV *coro)
858{ 955{
956 dTHX;
957
859 if (SvROK (coro)) 958 if (SvROK (coro))
860 coro = SvRV (coro); 959 coro = SvRV (coro);
861 960
961 LOCK;
862 coro_enq (SvREFCNT_inc (coro)); 962 coro_enq (SvREFCNT_inc (coro));
963 UNLOCK;
964}
965
966static void
967prepare_schedule (struct transfer_args *ta)
968{
969 SV *current, *prev, *next;
970
971 current = GvSV (coro_current);
972
973 for (;;)
974 {
975 LOCK;
976 next = coro_deq (PRIO_MIN);
977 UNLOCK;
978
979 if (next)
980 break;
981
982 {
983 dSP;
984
985 ENTER;
986 SAVETMPS;
987
988 PUSHMARK (SP);
989 PUTBACK;
990 call_sv (GvSV (coro_idle), G_DISCARD);
991
992 FREETMPS;
993 LEAVE;
994 }
995 }
996
997 prev = SvRV (current);
998 SvRV (current) = next;
999
1000 /* free this only after the transfer */
1001 LOCK;
1002 free_coro_mortal ();
1003 UNLOCK;
1004 coro_mortal = prev;
1005
1006 ta->prev = SvSTATE (prev);
1007 ta->next = SvSTATE (next);
1008 ta->flags = TRANSFER_SAVE_ALL;
1009}
1010
1011static void
1012prepare_cede (struct transfer_args *ta)
1013{
1014 LOCK;
1015 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016 UNLOCK;
1017
1018 prepare_schedule (ta);
863} 1019}
864 1020
865static void 1021static void
866api_schedule (void) 1022api_schedule (void)
867{ 1023{
868 SV *prev, *next; 1024 dTHX;
1025 struct transfer_args ta;
869 1026
870 prev = SvRV (GvSV (coro_current)); 1027 prepare_schedule (&ta);
871 next = coro_deq (PRIO_MIN); 1028 TRANSFER (ta);
872
873 if (!next)
874 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
875
876 /* free this only after the transfer */
877 coro_mortal = prev;
878 SV_CORO (prev, "Coro::schedule");
879
880 SvRV (GvSV (coro_current)) = next;
881
882 SV_CORO (next, "Coro::schedule");
883
884 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
885 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
886} 1029}
887 1030
888static void 1031static void
889api_cede (void) 1032api_cede (void)
890{ 1033{
891 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1034 dTHX;
1035 struct transfer_args ta;
892 1036
893 api_schedule (); 1037 prepare_cede (&ta);
1038 TRANSFER (ta);
894} 1039}
895 1040
896MODULE = Coro::State PACKAGE = Coro::State 1041MODULE = Coro::State PACKAGE = Coro::State
897 1042
898PROTOTYPES: ENABLE 1043PROTOTYPES: DISABLE
899 1044
900BOOT: 1045BOOT:
901{ /* {} necessary for stoopid perl-5.6.x */ 1046{
902 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1047#ifdef USE_ITHREADS
903 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1048 MUTEX_INIT (&coro_mutex);
1049#endif
1050 BOOT_PAGESIZE;
1051
904 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1052 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
905 1053
906 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1054 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
907 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1055 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
908 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1056 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
909 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
910
911 if (!padlist_cache)
912 padlist_cache = newHV ();
913 1057
914 main_mainstack = PL_mainstack; 1058 main_mainstack = PL_mainstack;
915 1059
916 coroapi.ver = CORO_API_VERSION; 1060 coroapi.ver = CORO_API_VERSION;
917 coroapi.transfer = api_transfer; 1061 coroapi.transfer = api_transfer;
918}
919 1062
920Coro::State 1063 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
921_newprocess(args) 1064}
922 SV * args 1065
923 PROTOTYPE: $ 1066SV *
1067new (char *klass, ...)
924 CODE: 1068 CODE:
925 Coro__State coro; 1069{
1070 struct coro *coro;
1071 HV *hv;
1072 int i;
926 1073
927 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
928 croak ("Coro::State::_newprocess expects an arrayref");
929
930 New (0, coro, 1, struct coro); 1074 Newz (0, coro, 1, struct coro);
1075 coro->args = newAV ();
931 1076
932 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1077 hv = newHV ();
933 coro->mainstack = 0; /* actual work is done inside transfer */ 1078 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
934 coro->stack = 0; 1079 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
935 1080
936 /* same as JMPENV_BOOTSTRAP */ 1081 for (i = 1; i < items; i++)
937 /* we might be able to recycle start_env, but safe is safe */ 1082 av_push (coro->args, newSVsv (ST (i)));
938 Zero(&coro->start_env, 1, JMPENV); 1083}
939 coro->start_env.je_ret = -1;
940 coro->start_env.je_mustcatch = TRUE;
941
942 RETVAL = coro;
943 OUTPUT: 1084 OUTPUT:
944 RETVAL 1085 RETVAL
945 1086
946void 1087void
947transfer(prev, next, flags) 1088_set_stacklevel (...)
948 SV *prev 1089 ALIAS:
949 SV *next 1090 Coro::State::transfer = 1
950 int flags 1091 Coro::schedule = 2
951 PROTOTYPE: @ 1092 Coro::cede = 3
1093 Coro::Cont::yield = 4
952 CODE: 1094 CODE:
953 PUTBACK; 1095{
954 SV_CORO (next, "Coro::transfer"); 1096 struct transfer_args ta;
955 SV_CORO (prev, "Coro::transfer"); 1097
956 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1098 switch (ix)
957 SPAGAIN; 1099 {
1100 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break;
1105
1106 case 1:
1107 if (items != 3)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1109
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1111 break;
1112
1113 case 2:
1114 prepare_schedule (&ta);
1115 break;
1116
1117 case 3:
1118 prepare_cede (&ta);
1119 break;
1120
1121 case 4:
1122 {
1123 SV *yieldstack;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break;
1146
1147 }
1148
1149 TRANSFER (ta);
1150}
958 1151
959void 1152void
960DESTROY(coro) 1153_clone_state_from (SV *dst, SV *src)
961 Coro::State coro 1154 CODE:
962 CODE: 1155{
1156 struct coro *coro_src = SvSTATE (src);
963 1157
964 if (coro->mainstack && coro->mainstack != main_mainstack) 1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
965 {
966 struct coro temp;
967 1159
968 PUTBACK; 1160 ++coro_src->refcnt;
969 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
970 LOAD(aTHX_ coro); 1162}
971 SPAGAIN;
972
973 destroy_stacks (aTHX);
974
975 LOAD((&temp)); /* this will get rid of defsv etc.. */
976 SPAGAIN;
977
978 coro->mainstack = 0;
979 }
980
981 deallocate_stack (coro);
982
983 Safefree (coro);
984 1163
985void 1164void
986flush()
987 CODE:
988#ifdef MAY_FLUSH
989 flush_padlist_cache ();
990#endif
991
992void
993_exit(code) 1165_exit (code)
994 int code 1166 int code
995 PROTOTYPE: $ 1167 PROTOTYPE: $
996 CODE: 1168 CODE:
997#if defined(__GLIBC__) || _POSIX_C_SOURCE
998 _exit (code); 1169 _exit (code);
999#else
1000 signal (SIGTERM, SIG_DFL);
1001 raise (SIGTERM);
1002 exit (code);
1003#endif
1004 1170
1005MODULE = Coro::State PACKAGE = Coro::Cont 1171int
1172cctx_count ()
1173 CODE:
1174 RETVAL = cctx_count;
1175 OUTPUT:
1176 RETVAL
1006 1177
1007# this is slightly dirty (should expose a c-level api) 1178int
1008 1179cctx_idle ()
1009void 1180 CODE:
1010yield(...) 1181 RETVAL = cctx_idle;
1011 PROTOTYPE: @ 1182 OUTPUT:
1012 CODE: 1183 RETVAL
1013 static SV *returnstk;
1014 SV *sv;
1015 AV *defav = GvAV (PL_defgv);
1016 struct coro *prev, *next;
1017
1018 if (!returnstk)
1019 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1020
1021 /* set up @_ -- ugly */
1022 av_clear (defav);
1023 av_fill (defav, items - 1);
1024 while (items--)
1025 av_store (defav, items, SvREFCNT_inc (ST(items)));
1026
1027 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1028 sv = av_pop ((AV *)SvRV (returnstk));
1029 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1030 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1031 SvREFCNT_dec (sv);
1032
1033 transfer(aTHX_ prev, next, 0);
1034 1184
1035MODULE = Coro::State PACKAGE = Coro 1185MODULE = Coro::State PACKAGE = Coro
1036 1186
1037# this is slightly dirty (should expose a c-level api)
1038
1039BOOT: 1187BOOT:
1040{ 1188{
1041 int i; 1189 int i;
1190
1042 HV *stash = gv_stashpv ("Coro", TRUE); 1191 coro_stash = gv_stashpv ("Coro", TRUE);
1043 1192
1044 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1193 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1194 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1195 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1196 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1197 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1198 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050 1199
1051 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1200 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1201 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053 1202
1054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1203 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
… …
1062 coroapi.ready = api_ready; 1211 coroapi.ready = api_ready;
1063 coroapi.nready = &coro_nready; 1212 coroapi.nready = &coro_nready;
1064 coroapi.current = coro_current; 1213 coroapi.current = coro_current;
1065 1214
1066 GCoroAPI = &coroapi; 1215 GCoroAPI = &coroapi;
1067 sv_setiv(sv, (IV)&coroapi); 1216 sv_setiv (sv, (IV)&coroapi);
1068 SvREADONLY_on(sv); 1217 SvREADONLY_on (sv);
1069 } 1218 }
1070} 1219}
1071 1220
1221int
1222prio (Coro::State coro, int newprio = 0)
1223 ALIAS:
1224 nice = 1
1225 CODE:
1226{
1227 RETVAL = coro->prio;
1228
1229 if (items > 1)
1230 {
1231 if (ix)
1232 newprio += coro->prio;
1233
1234 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236
1237 coro->prio = newprio;
1238 }
1239}
1240
1072void 1241void
1073ready(self) 1242ready (SV *self)
1074 SV * self
1075 PROTOTYPE: $ 1243 PROTOTYPE: $
1076 CODE: 1244 CODE:
1077 api_ready (self); 1245 api_ready (self);
1078 1246
1079int 1247int
1080nready(...) 1248nready (...)
1081 PROTOTYPE: 1249 PROTOTYPE:
1082 CODE: 1250 CODE:
1083 RETVAL = coro_nready; 1251 RETVAL = coro_nready;
1084 OUTPUT: 1252 OUTPUT:
1085 RETVAL 1253 RETVAL
1086 1254
1255MODULE = Coro::State PACKAGE = Coro::AIO
1256
1257SV *
1258_get_state ()
1259 CODE:
1260{
1261 struct {
1262 int errorno;
1263 int laststype;
1264 int laststatval;
1265 Stat_t statcache;
1266 } data;
1267
1268 data.errorno = errno;
1269 data.laststype = PL_laststype;
1270 data.laststatval = PL_laststatval;
1271 data.statcache = PL_statcache;
1272
1273 RETVAL = newSVpvn ((char *)&data, sizeof data);
1274}
1275 OUTPUT:
1276 RETVAL
1277
1087void 1278void
1088schedule(...) 1279_set_state (char *data_)
1089 PROTOTYPE: 1280 PROTOTYPE: $
1090 CODE: 1281 CODE:
1091 api_schedule (); 1282{
1283 struct {
1284 int errorno;
1285 int laststype;
1286 int laststatval;
1287 Stat_t statcache;
1288 } *data = (void *)data_;
1092 1289
1093void 1290 errno = data->errorno;
1094cede(...) 1291 PL_laststype = data->laststype;
1095 PROTOTYPE: 1292 PL_laststatval = data->laststatval;
1096 CODE: 1293 PL_statcache = data->statcache;
1097 api_cede (); 1294}
1098

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