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Comparing Coro/Coro/State.xs (file contents):
Revision 1.23 by root, Tue Aug 14 04:33:58 2001 UTC vs.
Revision 1.108 by root, Mon Nov 27 18:15:47 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_ANON
13# ifdef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 55# ifdef 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
69#else
70# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0
72#endif
20 73
21#define MAY_FLUSH /* increases codesize */
22
23#define SUB_INIT "Coro::State::initialize"
24#define UCORO_STATE "_coro_state"
25
26/* The next macro should delcare a variable stacklevel that contains and approximation 74/* The next macro should declare a variable stacklevel that contains and approximation
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 labs(l) ((l) >= 0 ? (l) : -(l)) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
81
82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif
87
88#define NOINLINE attribute ((noinline))
32 89
33#include "CoroAPI.h" 90#include "CoroAPI.h"
34 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
35static 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 */
36 107
37/* this is actually not only the c stack but also c registers etc... */ 108static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle;
110
111/* this is a structure representing a c-level coroutine */
38typedef struct { 112typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 113 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 114
43 coro_context cctx; 115 /* the stack */
44
45 void *sptr; 116 void *sptr;
46 long ssize; /* positive == mmap, otherwise malloc */ 117 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack;
48 118
119 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
121 JMPENV *top_env;
122 coro_context cctx;
123
124#if USE_VALGRIND
125 int valgrind_id;
126#endif
127} coro_cctx;
128
129/* this is a structure representing a perl-level coroutine */
49struct coro { 130struct coro {
50 /* the optional C context */ 131 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 132 coro_cctx *cctx;
52 void *cursp; 133
134 /* data associated with this coroutine (initial args) */
135 AV *args;
53 int gencnt; 136 int refcnt;
54 137
55 /* optionally saved, might be zero */ 138 /* optionally saved, might be zero */
56 AV *defav; 139 AV *defav;
57 SV *defsv; 140 SV *defsv;
58 SV *errsv; 141 SV *errsv;
59 142
60 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
61 U8 dowarn; 144# include "state.h"
62 I32 in_eval; 145#undef VAR
63 146
64 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
65 PERL_SI *curstackinfo; 148 int prio;
66 AV *curstack;
67 AV *mainstack;
68 SV **stack_sp;
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91
92 /* data associated with this coroutine (initial args) */
93 AV *args;
94}; 149};
95 150
96typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
98 153
99static AV *main_mainstack; /* used to differentiate between $main and others */ 154static AV *
100static HV *coro_state_stash; 155coro_clone_padlist (CV *cv)
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{ 156{
109 AV *av; 157 AV *padlist = CvPADLIST (cv);
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 159
128 newpadlist = newAV (); 160 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 162#if PERL_VERSION_ATLEAST (5,9,0)
163 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#endif
167 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
168 --AvFILLp (padlist);
169
170 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
132 172
133 av = newAV (); /* will be @_ */ 173 return newpadlist;
134 av_extend (av, 0); 174}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 175
138 for (ix = fpad; ix > 0; ix--) 176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
139 { 181 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 182 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 183 while (i >= 0)
142 { 184 {
143 char *name = SvPVX (namesv); /* XXX */ 185 SV **svp = av_fetch (padlist, i--, FALSE);
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 186 if (svp)
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 } 187 {
148 else
149 { /* our own lexical */
150 SV *sv; 188 SV *sv;
151 if (*name == '&') 189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152 sv = SvREFCNT_inc (ppad[ix]); 190 SvREFCNT_dec (sv);
153 else if (*name == '@') 191
154 sv = (SV *) newAV (); 192 SvREFCNT_dec (*svp);
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 } 193 }
163 } 194 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 195
165 { 196 SvREFCNT_dec ((SV*)padlist);
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 } 197 }
198}
175 199
176#if 0 /* return -ENOTUNDERSTOOD */ 200static int
177 /* Now that vars are all in place, clone nested closures. */ 201coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
202{
203 AV *padlist;
204 AV *av = (AV *)mg->mg_obj;
178 205
179 for (ix = fpad; ix > 0; ix--) { 206 /* casting is fun. */
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
181 if (namesv 208 free_padlist (padlist);
182 && namesv != &PL_sv_undef 209
183 && !(SvFLAGS(namesv) & SVf_FAKE) 210 SvREFCNT_dec (av);
184 && *SvPVX(namesv) == '&' 211
185 && CvCLONE(ppad[ix])) 212 return 0;
186 { 213}
187 CV *kid = cv_clone((CV*)ppad[ix]); 214
188 SvREFCNT_dec(ppad[ix]); 215#define PERL_MAGIC_coro PERL_MAGIC_ext
189 CvCLONE_on(kid); 216
190 SvPADMY_on(kid); 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
191 npad[ix] = (SV*)kid; 218
192 } 219/* the next two functions merely cache the padlists */
220static void
221get_padlist (CV *cv)
222{
223 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
224
225 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
226 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
227 else
228 {
229#if 0
230 /* this is probably cleaner, but also slower? */
231 CV *cp = Perl_cv_clone (cv);
232 CvPADLIST (cv) = CvPADLIST (cp);
233 CvPADLIST (cp) = 0;
234 SvREFCNT_dec (cp);
235#else
236 CvPADLIST (cv) = coro_clone_padlist (cv);
237#endif
238 }
239}
240
241static void
242put_padlist (CV *cv)
243{
244 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
245
246 if (!mg)
247 {
248 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250 mg->mg_virtual = &vtbl_coro;
251 mg->mg_obj = (SV *)newAV ();
193 } 252 }
194#endif
195 253
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC AV *
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 254 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
244} 255}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271 256
272#define SB do { 257#define SB do {
273#define SE } while (0) 258#define SE } while (0)
274 259
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 260#define LOAD(state) load_state((state));
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 261#define SAVE(state,flags) save_state((state),(flags));
277 262
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 263#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
279 264
280static void 265static void
281load_state(pTHX_ Coro__State c) 266load_state(Coro__State c)
282{ 267{
283 PL_dowarn = c->dowarn; 268#define VAR(name,type) PL_ ## name = c->name;
284 PL_in_eval = c->in_eval; 269# include "state.h"
285 270#undef VAR
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 271
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316 275
… …
325 284
326 if (padlist) 285 if (padlist)
327 { 286 {
328 put_padlist (cv); /* mark this padlist as available */ 287 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 288 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 } 289 }
334 290
335 ++CvDEPTH(cv); 291 ++CvDEPTH(cv);
336 } 292 }
337 293
338 PUTBACK; 294 PUTBACK;
339 } 295 }
340} 296}
341 297
342static void 298static void
343save_state(pTHX_ Coro__State c, int flags) 299save_state(Coro__State c, int flags)
344{ 300{
345 { 301 {
346 dSP; 302 dSP;
347 I32 cxix = cxstack_ix; 303 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 304 PERL_CONTEXT *ccstk = cxstack;
… …
355 311
356 PUSHs (Nullsv); 312 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 313 /* this loop was inspired by pp_caller */
358 for (;;) 314 for (;;)
359 { 315 {
360 do 316 while (cxix >= 0)
361 { 317 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 318 PERL_CONTEXT *cx = &ccstk[cxix--];
363 319
364 if (CxTYPE(cx) == CXt_SUB) 320 if (CxTYPE(cx) == CXt_SUB)
365 { 321 {
366 CV *cv = cx->blk_sub.cv; 322 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv)) 323 if (CvDEPTH(cv))
368 { 324 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 325 EXTEND (SP, CvDEPTH(cv)*2);
375 326
376 while (--CvDEPTH(cv)) 327 while (--CvDEPTH(cv))
377 { 328 {
378 /* this tells the restore code to increment CvDEPTH */ 329 /* this tells the restore code to increment CvDEPTH */
… …
381 } 332 }
382 333
383 PUSHs ((SV *)CvPADLIST(cv)); 334 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv); 335 PUSHs ((SV *)cv);
385 336
386 get_padlist (cv); /* this is a monster */ 337 get_padlist (cv);
387 } 338 }
388 } 339 }
340#ifdef CXt_FORMAT
389 else if (CxTYPE(cx) == CXt_FORMAT) 341 else if (CxTYPE(cx) == CXt_FORMAT)
390 { 342 {
391 /* I never used formats, so how should I know how these are implemented? */ 343 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */ 344 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 345 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 } 346 }
347#endif
395 } 348 }
396 while (cxix >= 0);
397 349
398 if (top_si->si_type == PERLSI_MAIN) 350 if (top_si->si_type == PERLSI_MAIN)
399 break; 351 break;
400 352
401 top_si = top_si->si_prev; 353 top_si = top_si->si_prev;
… …
408 360
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 361 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 362 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 363 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412 364
413 /* I have not the slightest idea of why av_reify is necessary */ 365#define VAR(name,type)c->name = PL_ ## name;
414 /* but if it's missing the defav contents magically get replaced sometimes */ 366# include "state.h"
415 if (c->defav) 367#undef VAR
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447} 368}
448 369
449/* 370/*
450 * allocate various perl stacks. This is an exact copy 371 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 372 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 373 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 374 * not usually need a lot of stackspace.
454 */ 375 */
455STATIC void 376static void
456coro_init_stacks (pTHX) 377coro_init_stacks ()
457{ 378{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 379 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN; 380 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 381 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 382 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
471 392
472 New(54,PL_markstack,16,I32); 393 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 394 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 395 PL_markstack_max = PL_markstack + 16;
475 396
397#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 398 SET_MARK_OFFSET;
399#endif
477 400
478 New(54,PL_scopestack,16,I32); 401 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0; 402 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 403 PL_scopestack_max = 16;
481 404
482 New(54,PL_savestack,96,ANY); 405 New(54,PL_savestack,96,ANY);
483 PL_savestack_ix = 0; 406 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 407 PL_savestack_max = 96;
485 408
409#if !PERL_VERSION_ATLEAST (5,9,0)
486 New(54,PL_retstack,8,OP*); 410 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0; 411 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 412 PL_retstack_max = 8;
413#endif
489} 414}
490 415
491/* 416/*
492 * destroy the stacks, the callchain etc... 417 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 418 */
495STATIC void 419static void
496destroy_stacks(pTHX) 420coro_destroy_stacks ()
497{ 421{
422 if (!IN_DESTRUCT)
423 {
498 /* is this ugly, I ask? */ 424 /* is this ugly, I ask? */
499 while (PL_scopestack_ix) 425 LEAVE_SCOPE (0);
500 LEAVE;
501 426
502 /* sure it is, but more important: is it correct?? :/ */ 427 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS; 428 FREETMPS;
429
430 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
431 }
505 432
506 while (PL_curstackinfo->si_next) 433 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 434 PL_curstackinfo = PL_curstackinfo->si_next;
508 435
509 while (PL_curstackinfo) 436 while (PL_curstackinfo)
510 { 437 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 438 PERL_SI *p = PL_curstackinfo->si_prev;
512 439
513 { 440 { /*D*//*remove*/
514 dSP; 441 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 442 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */ 443 PUTBACK; /* possibly superfluous */
517 } 444 }
518 445
519 dounwind(-1); 446 if (!IN_DESTRUCT)
520 447 {
448 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 449 SvREFCNT_dec (PL_curstackinfo->si_stack);
450 }
451
522 Safefree(PL_curstackinfo->si_cxstack); 452 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree(PL_curstackinfo); 453 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 454 PL_curstackinfo = p;
525 } 455 }
526 456
527 Safefree(PL_tmps_stack); 457 Safefree (PL_tmps_stack);
528 Safefree(PL_markstack); 458 Safefree (PL_markstack);
529 Safefree(PL_scopestack); 459 Safefree (PL_scopestack);
530 Safefree(PL_savestack); 460 Safefree (PL_savestack);
461#if !PERL_VERSION_ATLEAST (5,9,0)
531 Safefree(PL_retstack); 462 Safefree (PL_retstack);
532}
533
534static void
535allocate_stack (Coro__State ctx, int alloc)
536{
537 coro_stack *stack;
538
539 New (0, stack, 1, coro_stack);
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544 if (alloc)
545 {
546#ifdef HAVE_MMAP
547 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
548 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
549 if (stack->sptr == (void *)-1)
550#endif 463#endif
551 {
552 /*FIXME*//*D*//* reasonable stack size! */
553 stack->ssize = -4096 * sizeof (long);
554 New (0, stack->sptr, 4096, long);
555 }
556 }
557 else
558 stack->sptr = 0;
559
560 ctx->stack = stack;
561} 464}
562 465
563static void 466static void
564deallocate_stack (Coro__State ctx) 467setup_coro (struct coro *coro)
565{
566 coro_stack *stack = ctx->stack;
567
568 ctx->stack = 0;
569
570 if (stack)
571 {
572 if (!--stack->refcnt)
573 {
574#ifdef HAVE_MMAP
575 if (stack->ssize > 0 && stack->sptr)
576 munmap (stack->sptr, stack->ssize);
577 else
578#else
579 Safefree (stack->sptr);
580#endif
581 Safefree (stack);
582 }
583 else if (ctx->gencnt == stack->gencnt)
584 --stack->usecnt;
585 }
586}
587
588static void
589setup_coro (void *arg)
590{ 468{
591 /* 469 /*
592 * emulate part of the perl startup here. 470 * emulate part of the perl startup here.
593 */ 471 */
472
473 coro_init_stacks ();
474
475 PL_curcop = 0;
476 PL_in_eval = 0;
477 PL_curpm = 0;
478
479 {
480 dSP;
481 LOGOP myop;
482
483 /* I have no idea why this is needed, but it is */
484 PUSHMARK (SP);
485
486 SvREFCNT_dec (GvAV (PL_defgv));
487 GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489 Zero (&myop, 1, LOGOP);
490 myop.op_next = Nullop;
491 myop.op_flags = OPf_WANT_VOID;
492
493 PL_op = (OP *)&myop;
494
495 PUSHMARK (SP);
496 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497 PUTBACK;
498 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499 SPAGAIN;
500
501 ENTER; /* necessary e.g. for dounwind */
502 }
503}
504
505static void
506free_coro_mortal ()
507{
508 if (coro_mortal)
509 {
510 SvREFCNT_dec (coro_mortal);
511 coro_mortal = 0;
512 }
513}
514
515static void NOINLINE
516prepare_cctx (coro_cctx *cctx)
517{
594 dSP; 518 dSP;
595 Coro__State ctx = (Coro__State)arg; 519 LOGOP myop;
596 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
597 520
598 coro_init_stacks (aTHX); 521 Zero (&myop, 1, LOGOP);
599 /*PL_curcop = 0;*/ 522 myop.op_next = PL_op;
600 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 523 myop.op_flags = OPf_WANT_VOID;
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = ctx->args;
603 524
525 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526
527 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529 PUTBACK;
530 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
604 SPAGAIN; 531 SPAGAIN;
605
606 if (ctx->stack)
607 {
608 ctx->cursp = 0;
609
610 PUSHMARK(SP);
611 PUTBACK;
612 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
613
614 if (SvTRUE (ERRSV))
615 croak (NULL);
616 else
617 croak ("FATAL: CCTXT coroutine returned!");
618 }
619 else
620 {
621 UNOP myop;
622
623 PL_op = (OP *)&myop;
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 }
644} 532}
645 533
646static void 534static void
647continue_coro (void *arg) 535coro_run (void *arg)
648{ 536{
537 /* coro_run is the alternative epilogue of transfer() */
538 UNLOCK;
539
649 /* 540 /*
650 * this is a _very_ stripped down perl interpreter ;) 541 * this is a _very_ stripped down perl interpreter ;)
651 */ 542 */
652 Coro__State ctx = (Coro__State)arg; 543 PL_top_env = &PL_start_env;
653 544
654 /*FIXME*//* must set up top_env here */ 545 /* inject call to cctx_init */
655 ctx->cursp = 0; 546 prepare_cctx ((coro_cctx *)arg);
656 PL_op = PL_op->op_next;
657 CALLRUNOPS(aTHX);
658 547
548 /* somebody will hit me for both perl_run and PL_restartop */
549 perl_run (PL_curinterp);
550
551 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
659 abort (); 552 abort ();
660} 553}
661 554
662STATIC void 555static coro_cctx *
556cctx_new ()
557{
558 coro_cctx *cctx;
559
560 ++cctx_count;
561
562 New (0, cctx, 1, coro_cctx);
563
564#if HAVE_MMAP
565
566 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
567 /* mmap suppsedly does allocate-on-write for us */
568 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
569
570 if (cctx->sptr == (void *)-1)
571 {
572 perror ("FATAL: unable to mmap stack for coroutine");
573 _exit (EXIT_FAILURE);
574 }
575
576# if STACKGUARD
577 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
578# endif
579
580#else
581
582 cctx->ssize = STACKSIZE * (long)sizeof (long);
583 New (0, cctx->sptr, STACKSIZE, long);
584
585 if (!cctx->sptr)
586 {
587 perror ("FATAL: unable to malloc stack for coroutine");
588 _exit (EXIT_FAILURE);
589 }
590
591#endif
592
593#if USE_VALGRIND
594 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
595 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596 cctx->ssize + (char *)cctx->sptr
597 );
598#endif
599
600 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
601
602 return cctx;
603}
604
605static void
606cctx_free (coro_cctx *cctx)
607{
608 if (!cctx)
609 return;
610
611 --cctx_count;
612
613#if USE_VALGRIND
614 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615#endif
616
617#if HAVE_MMAP
618 munmap (cctx->sptr, cctx->ssize);
619#else
620 Safefree (cctx->sptr);
621#endif
622
623 Safefree (cctx);
624}
625
626static coro_cctx *
627cctx_get ()
628{
629 coro_cctx *cctx;
630
631 if (cctx_first)
632 {
633 --cctx_idle;
634 cctx = cctx_first;
635 cctx_first = cctx->next;
636 }
637 else
638 {
639 cctx = cctx_new ();
640 PL_op = PL_op->op_next;
641 }
642
643 return cctx;
644}
645
646static void
647cctx_put (coro_cctx *cctx)
648{
649 ++cctx_idle;
650 cctx->next = cctx_first;
651 cctx_first = cctx;
652}
653
654/* never call directly, always through the coro_state_transfer global variable */
655static void NOINLINE
663transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 656transfer (struct coro *prev, struct coro *next, int flags)
664{ 657{
665 dSP;
666 dSTACKLEVEL; 658 dSTACKLEVEL;
667 659
660 /* sometimes transfer is only called to set idle_sp */
661 if (flags == TRANSFER_SET_STACKLEVEL)
662 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
668 if (prev != next) 663 else if (prev != next)
669 { 664 {
665 coro_cctx *prev__cctx;
666
667 LOCK;
668
670 if (next->mainstack) 669 if (next->mainstack)
671 { 670 {
671 /* coroutine already started */
672 SAVE (prev, flags); 672 SAVE (prev, flags);
673 LOAD (next); 673 LOAD (next);
674
675 /* mark this state as in-use */
676 next->mainstack = 0;
677 next->tmps_ix = -2;
678
679 /* stacklevel changed? if yes, grab the stack for us! */
680 if (flags & TRANSFER_SAVE_CCTXT)
681 {
682 if (!prev->stack)
683 allocate_stack (prev, 0);
684 else if (prev->cursp != stacklevel
685 && prev->stack->usecnt > 1)
686 {
687 prev->gencnt = ++prev->stack->gencnt;
688 prev->stack->usecnt = 1;
689 }
690
691 /* has our stack been invalidated? */
692 if (next->stack && next->stack->gencnt != next->gencnt)
693 {
694 deallocate_stack (next);
695 allocate_stack (next, 1);
696 coro_create (&(next->stack->cctx),
697 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize));
699 }
700
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
702 }
703
704 } 674 }
705 else if (next->tmps_ix == -2)
706 croak ("tried to transfer to running coroutine");
707 else 675 else
708 { 676 {
677 /* need to start coroutine */
709 SAVE (prev, -1); /* first get rid of the old state */ 678 /* first get rid of the old state */
710 679 SAVE (prev, -1);
711 if (flags & TRANSFER_SAVE_CCTXT) 680 /* setup coroutine call */
712 {
713 if (!prev->stack)
714 allocate_stack (prev, 0);
715
716 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
717 {
718 setup_coro (next);
719
720 prev->stack->refcnt++;
721 prev->stack->usecnt++;
722 next->stack = prev->stack;
723 next->gencnt = prev->gencnt;
724 }
725 else
726 {
727 allocate_stack (next, 1);
728 coro_create (&(next->stack->cctx),
729 setup_coro, (void *)next,
730 next->stack->sptr, labs (next->stack->ssize));
731 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
732 }
733 }
734 else
735 setup_coro (next); 681 setup_coro (next);
682 /* need a stack */
683 next->cctx = 0;
736 } 684 }
685
686 if (!prev->cctx)
687 /* create a new empty context */
688 Newz (0, prev->cctx, 1, coro_cctx);
689
690 prev__cctx = prev->cctx;
691
692 /* possibly "free" the cctx */
693 if (prev__cctx->idle_sp == STACKLEVEL)
694 {
695 cctx_put (prev__cctx);
696 prev->cctx = 0;
697 }
698
699 if (!next->cctx)
700 next->cctx = cctx_get ();
701
702 if (prev__cctx != next->cctx)
703 {
704 prev__cctx->top_env = PL_top_env;
705 PL_top_env = next->cctx->top_env;
706 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707 }
708
709 free_coro_mortal ();
710
711 UNLOCK;
737 } 712 }
738
739 next->cursp = stacklevel;
740} 713}
714
715struct transfer_args
716{
717 struct coro *prev, *next;
718 int flags;
719};
720
721#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
722
723static void
724coro_state_destroy (struct coro *coro)
725{
726 if (coro->refcnt--)
727 return;
728
729 if (coro->mainstack && coro->mainstack != main_mainstack)
730 {
731 struct coro temp;
732
733 SAVE ((&temp), TRANSFER_SAVE_ALL);
734 LOAD (coro);
735
736 coro_destroy_stacks ();
737
738 LOAD ((&temp)); /* this will get rid of defsv etc.. */
739
740 coro->mainstack = 0;
741 }
742
743 cctx_free (coro->cctx);
744 SvREFCNT_dec (coro->args);
745 Safefree (coro);
746}
747
748static int
749coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
750{
751 struct coro *coro = (struct coro *)mg->mg_ptr;
752 mg->mg_ptr = 0;
753
754 coro_state_destroy (coro);
755
756 return 0;
757}
758
759static int
760coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
761{
762 struct coro *coro = (struct coro *)mg->mg_ptr;
763
764 ++coro->refcnt;
765
766 return 0;
767}
768
769static MGVTBL coro_state_vtbl = {
770 0, 0, 0, 0,
771 coro_state_clear,
772 0,
773#ifdef MGf_DUP
774 coro_state_dup,
775#else
776# define MGf_DUP 0
777#endif
778};
741 779
742static struct coro * 780static struct coro *
743sv_to_coro (SV *arg, const char *funcname, const char *varname) 781SvSTATE (SV *coro)
744{ 782{
745 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 783 HV *stash;
784 MAGIC *mg;
785
786 if (SvROK (coro))
787 coro = SvRV (coro);
788
789 stash = SvSTASH (coro);
790 if (stash != coro_stash && stash != coro_state_stash)
746 { 791 {
747 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 792 /* very slow, but rare, check */
748 793 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
749 if (!he) 794 croak ("Coro::State object required");
750 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
751
752 arg = HeVAL(he);
753 } 795 }
754
755 /* must also be changed inside Coro::Cont::yield */
756 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
757 return (struct coro *) SvIV((SV*)SvRV(arg));
758 else
759 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
760}
761 796
797 mg = SvMAGIC (coro);
798 assert (mg->mg_type == PERL_MAGIC_ext);
799 return (struct coro *)mg->mg_ptr;
800}
801
762static void 802static void
803prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
804{
805 ta->prev = SvSTATE (prev);
806 ta->next = SvSTATE (next);
807 ta->flags = flags;
808}
809
810static void
763api_transfer(pTHX_ SV *prev, SV *next, int flags) 811api_transfer (SV *prev, SV *next, int flags)
764{ 812{
765 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 813 dTHX;
766 sv_to_coro (next, "Coro::transfer", "next"), 814 struct transfer_args ta;
767 flags); 815
816 prepare_transfer (&ta, prev, next, flags);
817 TRANSFER (ta);
768} 818}
769 819
770/** Coro ********************************************************************/ 820/** Coro ********************************************************************/
771 821
772#define PRIO_MAX 3 822#define PRIO_MAX 3
… …
776#define PRIO_IDLE -3 826#define PRIO_IDLE -3
777#define PRIO_MIN -4 827#define PRIO_MIN -4
778 828
779/* for Coro.pm */ 829/* for Coro.pm */
780static GV *coro_current, *coro_idle; 830static GV *coro_current, *coro_idle;
781static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 831static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832static int coro_nready;
782 833
783static void 834static void
784coro_enq (SV *sv) 835coro_enq (SV *sv)
785{ 836{
786 if (SvROK (sv)) 837 int prio;
787 { 838
788 SV *hv = SvRV (sv);
789 if (SvTYPE (hv) == SVt_PVHV) 839 if (SvTYPE (sv) != SVt_PVHV)
790 {
791 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
792 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
793
794 prio = prio > PRIO_MAX ? PRIO_MAX
795 : prio < PRIO_MIN ? PRIO_MIN
796 : prio;
797
798 av_push (coro_ready [prio - PRIO_MIN], sv);
799
800 return;
801 }
802 }
803
804 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 840 croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842 prio = SvSTATE (sv)->prio;
843
844 av_push (coro_ready [prio - PRIO_MIN], sv);
845 coro_nready++;
805} 846}
806 847
807static SV * 848static SV *
808coro_deq (int min_prio) 849coro_deq (int min_prio)
809{ 850{
… …
812 min_prio -= PRIO_MIN; 853 min_prio -= PRIO_MIN;
813 if (min_prio < 0) 854 if (min_prio < 0)
814 min_prio = 0; 855 min_prio = 0;
815 856
816 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 857 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
817 if (av_len (coro_ready[prio]) >= 0) 858 if (AvFILLp (coro_ready [prio]) >= 0)
859 {
860 coro_nready--;
818 return av_shift (coro_ready[prio]); 861 return av_shift (coro_ready [prio]);
862 }
819 863
820 return 0; 864 return 0;
821} 865}
822 866
823static void 867static void
824api_ready (SV *coro) 868api_ready (SV *coro)
825{ 869{
870 dTHX;
871
872 if (SvROK (coro))
873 coro = SvRV (coro);
874
875 LOCK;
826 coro_enq (SvREFCNT_inc (coro)); 876 coro_enq (SvREFCNT_inc (coro));
877 UNLOCK;
827} 878}
828 879
829static void 880static void
830api_schedule (int cede) 881prepare_schedule (struct transfer_args *ta)
831{ 882{
832 SV *prev, *next; 883 SV *current, *prev, *next;
833 884
834 prev = GvSV (coro_current); 885 current = GvSV (coro_current);
835 886
836 if (cede) 887 for (;;)
837 coro_enq (SvREFCNT_inc (prev)); 888 {
838 889 LOCK;
839 next = coro_deq (PRIO_MIN); 890 next = coro_deq (PRIO_MIN);
891 UNLOCK;
840 892
841 if (!next) 893 if (next)
842 next = SvREFCNT_inc (GvSV (coro_idle)); 894 break;
843 895
844 GvSV (coro_current) = SvREFCNT_inc (next); 896 {
845 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 897 dSP;
846 sv_to_coro (next, "Coro::schedule", "next coroutine"), 898
847 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 899 ENTER;
848 SvREFCNT_dec (next); 900 SAVETMPS;
849 SvREFCNT_dec (prev); 901
902 PUSHMARK (SP);
903 PUTBACK;
904 call_sv (GvSV (coro_idle), G_DISCARD);
905
906 FREETMPS;
907 LEAVE;
908 }
909 }
910
911 prev = SvRV (current);
912 SvRV (current) = next;
913
914 /* free this only after the transfer */
915 LOCK;
916 free_coro_mortal ();
917 UNLOCK;
918 coro_mortal = prev;
919
920 ta->prev = SvSTATE (prev);
921 ta->next = SvSTATE (next);
922 ta->flags = TRANSFER_SAVE_ALL;
923}
924
925static void
926prepare_cede (struct transfer_args *ta)
927{
928 LOCK;
929 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930 UNLOCK;
931
932 prepare_schedule (ta);
933}
934
935static void
936api_schedule (void)
937{
938 dTHX;
939 struct transfer_args ta;
940
941 prepare_schedule (&ta);
942 TRANSFER (ta);
943}
944
945static void
946api_cede (void)
947{
948 dTHX;
949 struct transfer_args ta;
950
951 prepare_cede (&ta);
952 TRANSFER (ta);
850} 953}
851 954
852MODULE = Coro::State PACKAGE = Coro::State 955MODULE = Coro::State PACKAGE = Coro::State
853 956
854PROTOTYPES: ENABLE 957PROTOTYPES: DISABLE
855 958
856BOOT: 959BOOT:
857{ /* {} necessary for stoopid perl-5.6.x */ 960{
858 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 961#ifdef USE_ITHREADS
859 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 962 MUTEX_INIT (&coro_mutex);
963#endif
964 BOOT_PAGESIZE;
965
860 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 966 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
861 967
862 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
863 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
864 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
865 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
866
867 if (!padlist_cache)
868 padlist_cache = newHV ();
869 971
870 main_mainstack = PL_mainstack; 972 main_mainstack = PL_mainstack;
871 973
872 {
873 SV *sv = perl_get_sv("Coro::API", 1);
874
875 coroapi.ver = CORO_API_VERSION - 1; 974 coroapi.ver = CORO_API_VERSION;
876 coroapi.transfer = api_transfer; 975 coroapi.transfer = api_transfer;
877 coroapi.schedule = api_schedule;
878 coroapi.ready = api_ready;
879 976
880 GCoroAPI = &coroapi; 977 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
881 sv_setiv(sv, (IV)&coroapi);
882 SvREADONLY_on(sv);
883 }
884} 978}
885 979
886Coro::State 980SV *
887_newprocess(args) 981new (char *klass, ...)
888 SV * args
889 PROTOTYPE: $
890 CODE: 982 CODE:
891 Coro__State coro; 983{
984 struct coro *coro;
985 HV *hv;
986 int i;
892 987
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
894 croak ("Coro::State::_newprocess expects an arrayref");
895
896 New (0, coro, 1, struct coro); 988 Newz (0, coro, 1, struct coro);
989 coro->args = newAV ();
897 990
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 991 hv = newHV ();
899 coro->mainstack = 0; /* actual work is done inside transfer */ 992 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
900 coro->stack = 0; 993 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
901 994
902 RETVAL = coro; 995 for (i = 1; i < items; i++)
996 av_push (coro->args, newSVsv (ST (i)));
997}
903 OUTPUT: 998 OUTPUT:
904 RETVAL 999 RETVAL
905 1000
906void 1001void
907transfer(prev, next, flags) 1002_set_stacklevel (...)
908 Coro::State_or_hashref prev 1003 ALIAS:
909 Coro::State_or_hashref next 1004 Coro::State::transfer = 1
910 int flags 1005 Coro::schedule = 2
911 PROTOTYPE: @ 1006 Coro::cede = 3
1007 Coro::Cont::yield = 4
912 CODE: 1008 CODE:
913 PUTBACK; 1009{
914 transfer (aTHX_ prev, next, flags); 1010 struct transfer_args ta;
915 SPAGAIN; 1011
1012 switch (ix)
1013 {
1014 case 0:
1015 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1016 ta.next = 0;
1017 ta.flags = TRANSFER_SET_STACKLEVEL;
1018 break;
1019
1020 case 1:
1021 if (items != 3)
1022 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1023
1024 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1025 break;
1026
1027 case 2:
1028 prepare_schedule (&ta);
1029 break;
1030
1031 case 3:
1032 prepare_cede (&ta);
1033 break;
1034
1035 case 4:
1036 {
1037 SV *yieldstack;
1038 SV *sv;
1039 AV *defav = GvAV (PL_defgv);
1040
1041 yieldstack = *hv_fetch (
1042 (HV *)SvRV (GvSV (coro_current)),
1043 "yieldstack", sizeof ("yieldstack") - 1,
1044 0
1045 );
1046
1047 /* set up @_ -- ugly */
1048 av_clear (defav);
1049 av_fill (defav, items - 1);
1050 while (items--)
1051 av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053 sv = av_pop ((AV *)SvRV (yieldstack));
1054 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056 ta.flags = 0;
1057 SvREFCNT_dec (sv);
1058 }
1059 break;
1060
1061 }
1062
1063 TRANSFER (ta);
1064}
916 1065
917void 1066void
918DESTROY(coro) 1067_clone_state_from (SV *dst, SV *src)
919 Coro::State coro 1068 CODE:
920 CODE: 1069{
1070 struct coro *coro_src = SvSTATE (src);
921 1071
922 if (coro->mainstack && coro->mainstack != main_mainstack) 1072 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
923 {
924 struct coro temp;
925 1073
926 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1074 ++coro_src->refcnt;
927 LOAD(aTHX_ coro); 1075 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
928 1076}
929 destroy_stacks (aTHX);
930
931 LOAD((&temp)); /* this will get rid of defsv etc.. */
932
933 coro->mainstack = 0;
934 }
935
936 deallocate_stack (coro);
937
938 Safefree (coro);
939 1077
940void 1078void
941flush()
942 CODE:
943#ifdef MAY_FLUSH
944 flush_padlist_cache ();
945#endif
946
947void
948_exit(code) 1079_exit (code)
949 int code 1080 int code
950 PROTOTYPE: $ 1081 PROTOTYPE: $
951 CODE: 1082 CODE:
952#if defined(__GLIBC__) || _POSIX_C_SOURCE
953 _exit (code); 1083 _exit (code);
954#else
955 signal (SIGTERM, SIG_DFL);
956 raise (SIGTERM);
957 exit (code);
958#endif
959 1084
960MODULE = Coro::State PACKAGE = Coro::Cont 1085int
1086cctx_count ()
1087 CODE:
1088 RETVAL = cctx_count;
1089 OUTPUT:
1090 RETVAL
961 1091
962# this is slightly dirty (should expose a c-level api) 1092int
963 1093cctx_idle ()
964void 1094 CODE:
965yield(...) 1095 RETVAL = cctx_idle;
966 PROTOTYPE: @ 1096 OUTPUT:
967 CODE: 1097 RETVAL
968 static SV *returnstk;
969 SV *sv;
970 AV *defav = GvAV (PL_defgv);
971 struct coro *prev, *next;
972
973 if (!returnstk)
974 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
975
976 /* set up @_ -- ugly */
977 av_clear (defav);
978 av_fill (defav, items - 1);
979 while (items--)
980 av_store (defav, items, SvREFCNT_inc (ST(items)));
981
982 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
983 sv = av_pop ((AV *)SvRV (returnstk));
984 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
985 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
986 SvREFCNT_dec (sv);
987
988 transfer(aTHX_ prev, next, 0);
989 1098
990MODULE = Coro::State PACKAGE = Coro 1099MODULE = Coro::State PACKAGE = Coro
991 1100
992# this is slightly dirty (should expose a c-level api)
993
994BOOT: 1101BOOT:
995{ 1102{
996 int i; 1103 int i;
1104
997 HV *stash = gv_stashpv ("Coro", TRUE); 1105 coro_stash = gv_stashpv ("Coro", TRUE);
998 1106
999 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1107 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1000 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1108 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1001 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1109 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1002 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1110 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1003 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1111 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1004 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1112 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1005 1113
1006 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1114 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1007 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1115 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1008 1116
1009 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1117 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1010 coro_ready[i] = newAV (); 1118 coro_ready[i] = newAV ();
1119
1120 {
1121 SV *sv = perl_get_sv("Coro::API", 1);
1122
1123 coroapi.schedule = api_schedule;
1124 coroapi.cede = api_cede;
1125 coroapi.ready = api_ready;
1126 coroapi.nready = &coro_nready;
1127 coroapi.current = coro_current;
1128
1129 GCoroAPI = &coroapi;
1130 sv_setiv (sv, (IV)&coroapi);
1131 SvREADONLY_on (sv);
1132 }
1133}
1134
1135int
1136prio (Coro::State coro, int newprio = 0)
1137 ALIAS:
1138 nice = 1
1139 CODE:
1140{
1141 RETVAL = coro->prio;
1142
1143 if (items > 1)
1144 {
1145 if (ix)
1146 newprio += coro->prio;
1147
1148 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150
1151 coro->prio = newprio;
1152 }
1011} 1153}
1012 1154
1013void 1155void
1014ready(self) 1156ready (SV *self)
1015 SV * self 1157 PROTOTYPE: $
1016 CODE: 1158 CODE:
1017 api_ready (self); 1159 api_ready (self);
1018 1160
1161int
1162nready (...)
1163 PROTOTYPE:
1164 CODE:
1165 RETVAL = coro_nready;
1166 OUTPUT:
1167 RETVAL
1168
1169MODULE = Coro::State PACKAGE = Coro::AIO
1170
1171SV *
1172_get_state ()
1173 CODE:
1174{
1175 struct {
1176 int errorno;
1177 int laststype;
1178 int laststatval;
1179 Stat_t statcache;
1180 } data;
1181
1182 data.errorno = errno;
1183 data.laststype = PL_laststype;
1184 data.laststatval = PL_laststatval;
1185 data.statcache = PL_statcache;
1186
1187 RETVAL = newSVpvn ((char *)&data, sizeof data);
1188}
1189 OUTPUT:
1190 RETVAL
1191
1019void 1192void
1020schedule(...) 1193_set_state (char *data_)
1021 ALIAS: 1194 PROTOTYPE: $
1022 cede = 1
1023 CODE: 1195 CODE:
1024 api_schedule (ix); 1196{
1197 struct {
1198 int errorno;
1199 int laststype;
1200 int laststatval;
1201 Stat_t statcache;
1202 } *data = (void *)data_;
1025 1203
1204 errno = data->errorno;
1205 PL_laststype = data->laststype;
1206 PL_laststatval = data->laststatval;
1207 PL_statcache = data->statcache;
1208}

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